FIXED-ANGLE CUTTING IMPLEMENT SHARPENER

Abstract

A fixed-angle cutting implement sharpener is disclosed, including a guide support, adjustment mechanisms, a cutting implement holder mechanism, and a sharpening mechanism. Two sets or one set of adjustment mechanisms are provided. The adjustment mechanisms each include an adjustment base mounted on the guide support, and the sharpening mechanism is mounted on the adjustment mechanism. During sharpening by the fixed-angle cutting implement sharpener, the adjustment base is movable along the guide support or the adjustment base is movable with the guide support to adjust a distance between the adjustment base and the cutting implement holder mechanism. The adjustment mechanism adjusts a first inclination angle of the sharpening mechanism by one or a combination of multi-angle adjustment and stepless adjustment, and the first inclination angle remains fixed after being adjusted. During the sharpening by the fixed-angle cutting implement sharpener, the sharpening mechanism is rotatable relative to the adjustment base to achieve a sharpening action.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of PCT/CN2025/143537, filed on Dec. 18, 2025, which claims priority to priority to Chinese application CN 202520092975.5, filed on Jan. 15, 2025, and Chinese application CN 202522576507.8, filed on Dec. 4, 2025. The contents of these applications are incorporated herein by reference in their entirety.

TECHNICAL FIELD

The present disclosure relates to the technical field of cutting implement sharpeners, and in particular, to a fixed-angle cutting implement sharpener.

BACKGROUND

During sharpening, an angle adjustment structure between a sharpening stone of a conventional horizontal double-sided fixed-angle cutting implement sharpener and a cutting implement is typically implemented by adjusting a distance between a pivot point of a sharpening rod and a point at which the sharpening rod is in contact with a cutting implement edge. This makes precise angle adjustment difficult. Furthermore, during sharpening by a conventional product, it is difficult to achieve more flexible sharpening effects and it is even more difficult to maintain a sharpening angle at all times.

SUMMARY

An objective of the present disclosure is to provide a fixed-angle cutting implement sharpener that can conveniently adjust a distance between a sharpening tool such as a sharpening stone or sandpaper and a cutting implement, thereby solving the problem of low flexibility during sharpening by a fixed-angle cutting implement sharpener at the present stage.

In order to solve the above problem, the present disclosure provides a fixed-angle cutting implement sharpener, including a guide support, adjustment mechanisms, a cutting implement holder mechanism, and a sharpening mechanism, where one or two adjustment mechanisms are provided, the two adjustment mechanisms are arranged on two sides of the cutting implement holder mechanism respectively or the one adjustment mechanisms is arranged on one side of the cutting implement holder mechanism, the adjustment mechanisms each include an adjustment base mounted on the guide support, and the sharpening mechanism is mounted on the adjustment mechanism; during sharpening by the fixed-angle cutting implement sharpener, the adjustment base is movable along the guide support or the adjustment base is movable with the guide support to adjust a distance between the adjustment base and the cutting implement holder mechanism; the adjustment mechanisms adjust a first inclination angle of the sharpening mechanism by one or a combination of multi-angle adjustment and stepless adjustment, and the first inclination angle remains fixed after being adjusted; and during the sharpening by the fixed-angle cutting implement sharpener, the sharpening mechanism is rotatable relative to the adjustment base to achieve a sharpening action.

The multi-angle adjustment here includes adjustment at a single or two or more angles. This can be implemented by replacement or adjustment, and the adjustment may be implemented by using an insertion hole, or the like. The stepless adjustment may be rotational adjustment.

Optionally, the cutting implement may be a knife.

Optionally, the sharpening mechanism includes a sharpening rod and a sharpening component, and the sharpening component is movably mounted on the sharpening rod. The sharpening component includes a sharpening tool, which may be a sharpening stone or sandpaper and is typically arranged on a side edge of the sharpening rod. The sharpening component may be an integrated or replaceable sharpening tool. During the sharpening, the sharpening component may move along the sharpening rod to achieve a sharpening action. Further optionally, the sharpening component is rotatable around the sharpening rod. Optionally, there may be one sharpening tool, or two sharpening tools that are arranged on two opposite sides of the sharpening rod respectively.

Optionally, the sharpening mechanism further includes a first rotating shaft connected to the sharpening rod. Optionally, the first rotating shaft is perpendicular to the sharpening rod.

Optionally, the sum of the first inclination angle and an angle formed between a plane in which the sharpening mechanism rotates relative to the adjustment base and a straight line on which the adjustment base moves is 90°, or an angle by which the sharpening mechanism deviates from a vertical plane of the adjustment base is equal to the first inclination angle, and the vertical plane is perpendicular to the guide support or a base.

Optionally, the adjustment mechanism further includes one or more angle replacement blocks; in a case where a plurality of angle replacement blocks are provided, the plurality of angle replacement blocks with rotary slots are detachably mounted on the adjustment base, the first rotating shaft is rotatably and detachably mounted in the rotary slot, and second inclination angles of the rotary slots of the plurality of angle replacement blocks are all different or partially different; in a case where one angle replacement block is provided, the angle replacement block with a rotary slot is detachably or non-detachably mounted on the adjustment base, and the first rotating shaft is rotatably and detachably mounted in the rotary slot.

Optionally, a projection of the rotary slot in a plane in which the adjustment base is located extends in a same direction as the guide support.

Optionally, the angle replacement block and the adjustment base are provided with a protrusion and a groove that mutually mate and are mutually slidable.

Optionally, one side of the angle replacement block that faces away from the rotary slot is provided with one or more countersunk holes for placing a magnetic element.

Optionally, the adjustment mechanism further includes an angle block rotating shaft and an angle positioning pin, one end of the one or more angle replacement blocks is rotatably arranged around the angle block rotating shaft, the one or more angle replacement blocks and a side wall of the adjustment base are each provided in advance with one or more mutually mating first mounting holes and second mounting holes for mounting the angle positioning pin, and in a case where the angle positioning pin is inserted into different second mounting holes, the second inclination angles are different.

Optionally, the plurality of first mounting holes are arranged linearly along an arc, while the second mounting holes are arranged along a straight line.

Optionally, the adjustment mechanism further includes a stepless adjustment shaft, the side wall of the adjustment base is provided with a waist-shaped hole, the stepless adjustment shaft is arranged in the waist-shaped hole and abuts against the bottom of the one or more angle replacement blocks, and in a case where the stepless adjustment shaft is positioned at different locations within the waist-shaped hole, the second inclination angles are different.

Optionally, the adjustment mechanism further includes an adjustment member, such as a screw or bolt, connected to the stepless adjustment shaft. By adjusting the adjustment member, e.g., through rotation, the position of the stepless adjustment shaft within the waist-shaped hole is adjusted. The adjustment member and the stepless adjustment shaft may be separate or integrated, or an end of the adjustment member may be inserted into the stepless adjustment shaft, so that the position of the stepless adjustment shaft is changed by rotating the adjustment member.

Optionally, the adjustment mechanism further includes a press-fit screw, the side wall of the adjustment base is further provided with a third mounting hole, and the press-fit screw is inserted into the third mounting hole to abut against the angle replacement block.

Optionally, the cutting implement holder mechanism may be fixed (non-rotating) relative to the guide support, but remains detachable, and may be configured to flip the cutting implement. Alternatively, the cutting implement held by the cutting implement holder mechanism is rotatable relative to the base, making it particularly suitable for sharpening a curved knife such as an inwardly curved knife. This allows for fixed-angle sharpening even on the curved knife, offering greater flexibility in cutting implement sharpening.

Optionally, the guide support is one or more shaft bodies, and the adjustment mechanism is connected to the shaft body through a linear bearing. In another solution, the guide support is a slide rail, and the adjustment mechanism is slidably mounted on the slide rail.

Optionally, the fixed-angle cutting implement sharpener may further include a base, on which a lug plate for supporting the guide support is arranged, and the cutting implement holder mechanism is mounted on the base.

Any of the above-mentioned guide support, adjustment mechanisms, cutting implement holder mechanism, and sharpening mechanism in the present disclosure may be used in cooperation with one another. For example, any adjustment mechanism for multi-angle adjustment may be matched with a fixed or rotatable cutting implement holder mechanism; and any adjustment mechanism for multi-angle adjustment may be matched with either a guide support that is a shaft body or guide support that is a slide rail, or the like.

The present disclosure has the following beneficial effects: By the arrangement of the guide support, the adjustment mechanism is movable on the guide support to adjust the distance between the adjustment mechanism and the cutting implement holder mechanism, so that the distance between the sharpening mechanism and the cutting implement can be flexibly adjusted at any time in the sharpening process. In addition, the adjustment mechanism is rotatable, and the adjustment process is smooth. This facilitates maintenance of a fixed sharpening angle α at all times and facilitates the sharpening process, thereby achieving more flexible sharpening effects. Furthermore, in this solution, a plurality of structures for adjusting the angle of the sharpening mechanism are further provided, and all the structures can achieve precise angle adjustment effects to further ensure sharpening effects. Notably, it allows for convenient sharpening angle setting and maintenance of the same angle at all times.

In a conventional cutting implement sharpener that performs adjustment by adjusting a distance between a pivot point of a sharpening rod and a point at which the sharpening rod is in contact with a cutting implement edge, an angle needs to be reset if a sharpening tool is replaced with a sharpening tool with a different thickness. For example, if a 1 mm-thick sharpening tool is set at 20° for cutting implement sharpening, and the sharpening tool is replaced with a thicker sharpening tool, the angle becomes smaller than 20° because the position of the pivot point remains unchanged. Therefore, the sharpening tools need to be used in conjunction with a digital protractor for use, and the angle needs to be readjusted during the sharpening. However, the angle α in this application is consistent at all times.

Furthermore, the multi-angle adjustment methods in this application do not require the use of a protractor.

BRIEF DESCRIPTION OF THE DRAWINGS

The following further describes the present disclosure with reference to the accompanying drawings and embodiments.

FIG. 1 is a schematic diagram of an overall structure of a fixed-angle cutting implement sharpener in this embodiment;

FIG. 2 is a schematic structural diagram of the fixed-angle cutting implement sharpener in FIG. 1 from another perspective;

FIG. 3 is a schematic structural diagram of another fixed-angle cutting implement sharpener;

FIG. 4 is a schematic structural diagram of a fixed-angle cutting implement sharpener with a slide rail structure;

FIG. 5 is a schematic structural diagram of an adjustment structure during multi-angle adjustment;

FIG. 6 is a schematic structural diagram of an adjustment structure during stepless adjustment;

FIG. 7 is a schematic diagram of the cooperation among an angle block rotating shaft, an angle positioning pin, and an angle replacement block;

FIG. 8 is a schematic diagram of the cooperation between an adjustment base and a stepless adjustment shaft;

FIG. 9 is a schematic diagram of the cooperation among an adjustment base, a stepless adjustment shaft, and an adjustment member;

FIG. 10 is another schematic diagram of the cooperation between a sharpening rod and an adjustment mechanism;

FIG. 11 is a schematic diagram of a multi-angle adjustment mechanism;

FIG. 12 is a schematic diagram of an angle replacement block;

FIG. 13 is a schematic rear view of FIG. 12;

FIG. 14 is a schematic diagram of an adjustment base in FIG. 11;

FIG. 15 is a cross-sectional view of a cutting implement holder mechanism;

FIG. 16 is another cross-sectional view of a cutting implement holder mechanism;

FIG. 17 is a schematic diagram of different states of a curved cutting implement during sharpening;

FIG. 18 is a cross-sectional view of a cutting implement; and

FIG. 19 is a schematic diagram of a first inclination angle.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The following description is provided solely to disclose the present disclosure, so that those skilled in the art can practice the present disclosure. The embodiments described below are merely illustrative, and those skilled in the art may conceive other obvious variations. The fundamental principles of the present disclosure as defined in the following description may be applied to other implementations, variations, improvements, equivalents, and other solutions that do not depart from the spirit and scope of the present disclosure.

As shown in FIG. 1 to FIG. 4, a fixed-angle cutting implement sharpener 100 includes a base 1, a guide support 3, an adjustment mechanism 4, a cutting implement holder mechanism 5, and a sharpening mechanism 6. The cutting implement holder mechanism 5 is configured to hold a to-be-sharpened cutting implement 7 for sharpening in cooperation with a sharpening stone of the sharpening mechanism. The guide support 3 and the adjustment mechanism 4 cooperate with each other to achieve fixed-angle cutting implement sharpening.

The cutting implement sharpener in this solution can be used either horizontally or vertically during operation, with no restrictions on a usage posture.

The fixed-angle of the fixed-angle cutting implement sharpener may refer to that a first inclination angle remains unchanged once it has been adjusted by adjusting the second inclination angle. Movement and rotation of the adjustment mechanism are adjusted during sharpening. However, the movement and rotation of the adjustment mechanism do not affect the first inclination angle, thereby achieving a fixed-angle. The first inclination angle here may be equal to or close to α mentioned later, which is an angle by which the sharpening mechanism deviates from a vertical line.

The second inclination angle may be the same as the first inclination angle, or the sum of the first inclination angle and the second inclination angle may be 90°.

A lug plate 2 configured to support the guide support 3 is arranged on the base 1. A direction in which the guide support 3 extends may be parallel or substantially parallel to a direction in which the base extends. Typically, the base 1 is mounted on a working surface, that is, the direction in which the guide support 3 extends is generally parallel to the working surface. There may be one, two, or more lug plates 2.

The cutting implement holder mechanism 5 is mounted on the base 1. The adjustment mechanism 4 is movably or slidably mounted on the guide support 3, or the adjustment mechanism 4 moves as the guide support 3 moves, to adjust the distance between the adjustment mechanism and the cutting implement holder mechanism. One end of the sharpening mechanism 6 is rotatably mounted on the adjustment mechanism 4 to achieve a back-and-forth sharpening action. The adjustment mechanism 4 adjusts the first inclination angle of the sharpening mechanism 6 by one or a combination of multi-angle adjustment and stepless adjustment, and the first inclination angle remains fixed after being adjusted, thereby achieving fixed-angle sharpening.

Optionally, the guide support 3 may be configured as a shaft body, which may be a round shaft, a double-sided-milled cylinder, a single-sided-milled cylinder, a prism, or the like. The double-sided-milled cylinder is implemented by cutting two opposite sides of a cylinder to separately form one parallel plane, resulting in an overall cross-section resembling a “runway”. The single-sided-milled cylinder is implemented by cutting a single side to form a parallel plane. There may be one or two guide support bodies. In this embodiment, the guide support bodies are two parallel shaft bodies.

The bottom of the adjustment base 46 is provided with a sliding hole, and the shaft body passes through the sliding hole (without bearings here). The guide support 3 is mounted on the lug plate 2 through a sliding bearing and penetrates through the lug plate. The guide support 3 is relatively long, and achieves movement or sliding effects through the sliding of the shaft.

In another solution, as shown in FIG. 4, the guide support 3 may alternatively be configured as a slide rail 49. The bottom of the adjustment base 46 may be provided with a matching slider 48, which is slidably mounted on the slide rail to achieve sliding.

In another solution, as shown in FIG. 3, the bottom of the adjustment base 46 is provided with a sliding hole, and a linear bearing is arranged in the sliding hole. The linear bearing 47 is connected to the guide support which is a shaft body, so that the adjustment mechanism 4 can slide on the guide support 3 through the linear bearing 47. Compared to the structures shown in FIG. 1 and FIG. 2, the guide support 3 is relatively short in this case.

In addition to the above-mentioned several structures, any structure on the market may be employed to achieve sliding or movement.

One adjustment mechanisms 4 is provided in FIG. 1 to FIG. 4, and is arranged on a single side of the cutting implement holder mechanism 5. In this case, the cutting implement holder mechanism may be configured as being either detachable or rotatable, or both, to achieve double-sided cutting implement sharpening. Two adjustment mechanisms 4 may alternatively be provided, allowing simultaneous machining of both sides of the cutting implement.

The adjustment mechanism 4 can move or slide along the guide support 3, to adjust the distance between the adjustment mechanism 4 and the cutting implement holder mechanism 5. The movement enables sharpening of all parts of the cutting implement edge at a consistent angle, thereby providing more flexible sharpening effects. One end of the sharpening mechanism 6 is mounted on the adjustment mechanism 4 which is configured to flexibly adjust the sharpening angle and position of the sharpening mechanism 6 in the sharpening process.

The sharpening mechanism 6 includes a sharpening rod 61 and a sharpening component. The sharpening component includes a sharpening stone typically positioned on a side edge of the sharpening rod. The sharpening component may be an integrated or replaceable sharpening stone. In this embodiment a replaceable sharpening stone is employed. The sharpening mechanism may alternatively utilize an existing structure on the market, provided that the sharpening mechanism includes a sharpening rod for connection to the adjustment mechanism 4.

The sharpening component is fixed or movably mounted on the sharpening rod 61. In the embodiments shown in FIG. 1 to FIG. 4, a movable mounting manner is used. The sharpening component includes a first sharpening stone frame 62 and one or two sharpening stones. The sharpening stone is magnetically attracted to the first sharpening stone frame. If two sharpening stones are provided, the two sharpening stones are clamped on two opposite sides of the first sharpening stone frame, and the first sharpening stone frame 62 is sleeved on the sharpening rod 61, which can achieve sliding and rotational adjustment. During the sharpening, the sharpening component may move along the sharpening rod and may also be configured to rotate around the sharpening rod to achieve a sharpening action.

The two sharpening stones may be a flat sharpening stone 631 and an arc sharpening stone 632, respectively. The arc may be outwardly convex, allowing the arc sharpening stone to more conveniently sharpern a curved cutting implement such as an inwardly curved cutting implement. Alternatively, the sharpening stone may alternatively be a narrower flat sharpening stone.

The sharpening mechanism further includes a first rotating shaft 64, which is connected to the sharpening rod. Optionally, the first rotating shaft is perpendicular to the sharpening rod.

An included angle formed between a plane in which the sharpening mechanism rotates relative to the adjustment base and a straight line on which the adjustment base moves is equal to the first inclination angle.

The above-mentioned sharpening stone may alternatively be replaced with sandpaper, or the like.

The cutting implement holder mechanism 5 may be of a commonly used structure on the market or be of the structures shown in FIG. 1 to FIG. 4. The cutting implement holder mechanism may rotate in a first direction, and a plane in which the cutting implement holder mechanism 5 rotates is perpendicular to the plane in which the base is located. This is particularly suitable for sharpening a curved cutting implement (FIG. 17), and a true fixed sharpening angle β (FIG. 18) can be achieved even if the curved cutting implement is sharpened, thereby enhancing sharpening flexibility. FIG. 18 is a cross-sectional view of the cutting implement 7. If the sharpening rod is rotated only, it is a little inconvenient to operate in places where a bending degree of the to-be-sharpened cutting implement changes sharply (such as the two ends of the curved cutting implement, a cutting implement holder, and a position close to a cutting implement handle). If both the sharpening rod and the cutting implement holder mechanism can rotate simultaneously, it allows for significant convenience. FIG. 17 is a schematic diagram of different states of simultaneous rotation of the sharpening rod and the cutting implement.

In other embodiments, the cutting implement holder mechanism 5 is fixed (non-rotating) relative to the guide support 3 but can still be detachable. Removal can facilitate cutting implement clamping before mounting and make it easy to remove the cutting implement for inspection during sharpening.

Furthermore, unlike FIG. 1 and FIG. 2, as shown in FIG. 3 and FIG. 4, to facilitate flipping, in a single-sided sharpening structure, the cutting implement holder mechanism may be configured as being either detachable or rotatable or detachable and rotatable to implement double-sided cutting implement sharpening. The rotation here is to facilitate cutting implement flipping and is performed in a second direction, and the rotation direction here is parallel to the plane in which the base is located.

In this case, the cutting implement holder mechanism 5 may include a cutting implement holder base 51, a support rod 52, and a cutting implement holder component 53. FIG. 15 and FIG. 16 are two cross-sectional views of the cutting implement holder mechanism in FIG. 3 along an axial cross-section of the support rod 52. The two cross-sections are mutually parallel. The cutting implement holder base 51 is divided into an upper cutting implement holder base 511 and a lower cutting implement holder base 512 which is mounted on the base. The upper cutting implement holder base and the lower cutting implement holder base are connected internally by a shaft body 513. A spring 514 is sleeved outside the shaft body. A rotary rod 515 is inserted into the bottom end of the shaft body 513. One or more balls or rollers 54 are arranged between contact surfaces of the upper cutting implement holder base and the lower cutting implement holder base. To fit with the ball and roller, corresponding grooves are provided in the upper cutting implement holder base and the lower cutting implement holder base. One side of the ball or roller is provided with a spring 55. During rotation, the ball or roller is pressed downward. After rotation is completed, the spring pushes the ball or roller out to for snap-fit in position, to enable the upper cutting implement holder base to rotate relative to the lower cutting implement holder base, thereby achieving cutting implement flipping.

In addition to the cutting implement holder mechanism shown in FIG. 15 and FIG. 16, other rotatable cutting implement holder mechanisms may alternatively be employed.

The cutting implement holder component 53 may include a cutting implement holder base 531 with a groove and at least one gripping jaw 532 for gripping the cutting implement. The gripping jaw is slidable and fixed in the groove. A rotating shaft 533 may be positioned in the middle of the slide rail of the cutting implement holder component. The cutting implement holder base is rotatable about the rotating shaft to adjust the angle of the cutting implement. The rotation here refers to the rotation in the first direction mentioned above.

Optionally, the adjustment mechanism performs stepless angle adjustment, multi-angle adjustment (non-stepless adjustment), or a combination of both. Stepless angle adjustment offers a wider range of adjustable angles, while multi-angle adjustment enables rapid angle positioning.

One type of multi-angle adjustment, as shown in FIG. 11 to FIG. 14, may be replaceable.

The adjustment mechanism includes an adjustment base 46 and a plurality of angle replacement blocks 41. Each angle replacement block is provided with a rotary slot 411 for mounting the first rotating shaft. The plurality of angle replacement blocks are detachably mounted on the adjustment base, and the first rotating shaft is rotatably and detachably mounted in the rotary slot. Second inclination angles γ of the rotary slots of the plurality of angle replacement blocks are all different; in other solutions, they may be partially different. As an extreme example, the adjustment mechanism may alternatively include an adjustment base and only one angle replacement block. The adjustment base 46 has a platform 43 for mounting the replacement block, and both sides of the platform 43 have side walls.

Optionally, a projection of the rotary slot in a plane in which the adjustment base is located or a plane in which the base 1 is located extends in a same direction as the guide support. For example, if the guide support extends in a left-right direction, the projection of the rotary slot in the plane in which the adjustment base is located also extends in a left-right direction. The extension direction of the rotary slot and the extension direction of the guide support are not parallel and form an included angle, which can be determined by the second inclination angle γ. Optionally, the angle replacement block and the adjustment base are provided with a protrusion and a groove that mutually mate and are mutually slidable to achieve sliding replacement. Two sets of mutually slidable protrusions and grooves may be configured, and arranged on both side walls, respectively. Additionally, fasteners such as bolts or screws may be arranged on the side walls to fix the angle replacement block and the adjustment base. Alternatively, the angle replacement block is directly placed in the adjustment base and then locked by a fastener, without providing a protrusion and a groove that mutually mate and are mutually slidable.

Optionally, one side of the angle replacement block that faces away from the rotary slot is provided with one or more countersunk holes 42 for placing a magnetic element. The magnetic element can enhance the secure connection of the first rotating shaft in the rotary slot and are close to the rotary slot. The magnetic element may be a magnet or the like.

Based on the above-mentioned multi-angle adjustment, the multi-angle adjustment may alternatively be combined with stepless adjustment, as shown in FIG. 1 to FIG. 9.

In addition to the above-mentioned structures, the adjustment mechanism further includes an angle block rotating shaft 441 and an angle positioning pin 442. One end of the angle replacement block is rotatably arranged around the angle block rotating shaft. The angle replacement block and a side wall of the adjustment base are each provided in advance with mutually mating first mounting hole 412 and second mounting hole 462 for mounting the angle positioning pin. In a case where the angle positioning pin is inserted into different second mounting holes, the second inclination angles are different.

Optionally, a rotation hole 464 configured to mate with the angle block rotating shaft 441 is further provided on the side wall of the adjustment base. A size of the rotation hole 464 may be slightly larger than that of the second mounting hole 462.

Optionally, a plurality of first mounting holes are arranged linearly along an arc, while the second mounting holes are arranged along a straight line. The rotation hole may not be aligned with the second mounting hole 462 on a same horizontal line; instead, a position of the rotation hole may be slightly lower than that of the second mounting hole 462, or in other words, disposed closer to the base 1.

Optionally, the adjustment mechanism further includes a stepless adjustment shaft 451. The side wall of the adjustment base is provided with a waist-shaped hole 461, or a long hole in another shape. The waist-shaped hole 461 may be provided in the side of the second mounting hole close to the adjustment base. The stepless adjustment shaft is arranged in the waist-shaped hole and abuts against the bottom of the one or more angle replacement blocks. In a case where the stepless adjustment shaft is positioned at different locations within the waist-shaped hole, the second inclination angles are different.

Optionally, the adjustment mechanism further includes a screw 452 connected to the stepless adjustment shaft. The position of the stepless adjustment shaft within the waist-shaped hole is controlled by adjusting the screw, so as to adjust the second inclination angle. A extending direction of the screw may be consistent with that of the guide support.

Optionally, the adjustment mechanism further includes a press-fit screw. The side wall of the adjustment base is further provided with a third mounting hole 463, and the press-fit screw is inserted into the third mounting hole to abut against the angle replacement block. The third mounting hole may be positioned in the side of the second mounting hole away from the adjustment base.

Optionally, one side of the angle replacement block that faces away from the rotary slot is provided with one or more countersunk holes 42 for placing a magnetic element. Magnetic element may enhance the secure connection of the first rotating shaft in the rotary slot.

In this case, multi-angle adjustment may be performed using the method shown in FIG. 5, primarily through the insertion hole, to cause the angle replacement block to rotate around the angle block rotating shaft 441, thereby changing the inclination angle. Stepless adjustment may be performed using the method shown in FIG. 6, and the position of the stepless adjustment shaft within the waist-shaped hole is controlled by rotating the screw to adjust the second inclination angle. Both multi-angle adjustment and stepless adjustment are feasible.

In another optional solution, if machining precision is sufficient, the press-fit screw 453 may be omitted.

The first inclination angle α ranges from 8° to 35°. Six inclination angles may be preset, and may be, for example, 15°, 17°, 18°, 20°, 25°, and 30°.

Further optionally, as shown in FIG. 10, a fixing member 454 may alternatively be arranged in the rotary slot to fix the first rotating shaft, which is detachably connected by threaded members such as screws. The first rotating shaft is rotatably arranged in a space enclosed by the fixing member and the rotary slot, and this structure does not require additional magnetic element. Further optionally, a sleeve or a bearing 455 is sleeved outside the first rotating shaft 64, and the sleeve or the bearing 455 is located in the space enclosed by the fixing member and the rotating groove.

During use, whether using the multi-angle adjustment, stepless adjustment, or a combination of both as described above, sharpening can be performed after the first inclination angle is adjusted well. During the sharpening, one end of the sharpening rod displaces as the adjustment mechanism slides or moves, thereby adjusting the distance between the end of the sharpening rod and the cutting implement holder mechanism. In addition, the contact position between the sharpening stone and the cutting implement is adjusted through rotation, allowing flexible adjustment to achieve a fixed-angle.

A small angle, such as 10°, is suitable for an extremely sharp blade such as a razor blade. A common angle, such as 20°, is suitable for most kitchen knives and outdoor knives. A large angle, such as 30°, is suitable for knives requiring durability, such as a chopper.

Those skilled in the art should understand that the embodiments of the present disclosure described above and shown in the accompanying drawings are provided merely as examples and do not limit the present disclosure. The objectives of the present disclosure have been fully and effectively achieved. The functional and structural principles of the present disclosure have been demonstrated and explained in the embodiments. Without departing from the principles, the implementations of the present disclosure may undergo any variations and modifications.

Claims

1. A fixed-angle cutting implement sharpener, comprising a guide support, an adjustment mechanism a cutting implement holder mechanism, and a sharpening mechanism, wherein the adjusting mechanism is provided in one or two, the two adjustment mechanisms are arranged on two sides of the cutting implement holder mechanism respectively or the on adjustment mechanisms is arranged on one side of the cutting implement holder mechanism, the adjustment mechanism comprise an adjustment base mounted on the guide support, and the sharpening mechanism is mounted on the adjustment mechanism;

during sharpening by the fixed-angle cutting implement sharpener, the adjustment base is movable along the guide support or the adjustment base is movable with the guide support to adjust a distance between the adjustment base and the cutting implement holder mechanism; and

the adjustment mechanism adjusts a first inclination angle of the sharpening mechanism by one or a combination of multi-angle adjustment and stepless adjustment, and the first inclination angle remains fixed after being adjusted; during the sharpening by the fixed-angle cutting implement sharpener, the sharpening mechanism is rotatable relative to the adjustment base to achieve a sharpening action.

2. The fixed-angle cutting implement sharpener according to claim 1, wherein the sharpening mechanism comprises a sharpening rod, a first rotating shaft, and a sharpening component, the sharpening component is movably mounted on the sharpening rod, and the first rotating shaft is connected to the sharpening rod.

3. The fixed-angle cutting implement sharpener according to claim 2, wherein the first rotating shaft is perpendicular to the sharpening rod.

4. The fixed-angle cutting implement sharpener according to claim 2, wherein an angle by which the sharpening mechanism deviates from a vertical plane of the adjustment base is equal to the first inclination angle, and the vertical plane is perpendicular to the guide support.

5. The fixed-angle cutting implement sharpener according to claim 3, wherein the adjustment mechanism further comprises one or more angle replacement blocks; in a case where a plurality of angle replacement blocks are provided, the plurality of angle replacement blocks with rotary slots are detachably mounted on the adjustment base, the first rotating shaft is rotatably and detachably mounted in the rotary slot, and second inclination angles of the rotary slots of the plurality of angle replacement blocks are all different or partially different; in a case where one angle replacement block is provided, the angle replacement block with a rotary slot is detachably or non-detachably mounted on the adjustment base, and the first rotating shaft is rotatably and detachably mounted in the rotary slot.

6. The fixed-angle cutting implement sharpener according to claim 5, wherein a projection of the rotary slot in a plane in which the adjustment base is located extends in a same direction as the guide support.

7. The fixed-angle cutting implement sharpener according to claim 6, wherein the angle replacement block and the adjustment base are provided with a protrusion and a groove that mutually mate and are mutually slidable.

8. The fixed-angle cutting implement sharpener according to claim 6, wherein the adjustment mechanism further comprises an angle block rotating shaft and an angle positioning pin, one end of the one or more angle replacement blocks is rotatably arranged around the angle block rotating shaft, the one or more angle replacement blocks and a side wall of the adjustment base are each provided in advance with one or more mutually mating first mounting holes and second mounting holes for mounting the angle positioning pin, and in a case where the angle positioning pin is inserted into different second mounting holes, the second inclination angles are different.

9. The fixed-angle cutting implement sharpener according to claim 7, wherein one side of the angle replacement block that faces away from the rotary slot is provided with one or more countersunk holes for placing a magnetic element.

10. The fixed-angle cutting implement sharpener according to claim 8, wherein the plurality of first mounting holes are arranged linearly along an arc, while the second mounting holes are arranged along a straight line.

11. The fixed-angle cutting implement sharpener according to claim 8, wherein the adjustment mechanism further comprises a stepless adjustment shaft, the side wall of the adjustment base is provided with a waist-shaped hole, the stepless adjustment shaft is arranged in the waist-shaped hole and abuts against the bottom of the one or more angle replacement blocks, and in a case where the stepless adjustment shaft is positioned at different locations within the waist-shaped hole, the second inclination angles are different.

12. The fixed-angle cutting implement sharpener according to claim 11, wherein the adjustment mechanism further comprises an adjustment member connected to the stepless adjustment shaft.

13. The fixed-angle cutting implement sharpener according to claim 12, wherein the adjustment mechanism further comprises a press-fit screw, the side wall of the adjustment base is further provided with a third mounting hole, and the press-fit screw is inserted into the third mounting hole to abut against the angle replacement block.

14. The fixed-angle cutting implement sharpener according to claim 5, wherein the guide support is one or more shaft bodies, and the adjustment mechanism is connected to the shaft body through a linear bearing to enable the adjustment base to move along the guide support.

15. The fixed-angle cutting implement sharpener according to claim 5, wherein the guide support is a slide rail, and the adjustment base is slidably mounted on the slide rail.