Abstract: The present invention provides a retractable cutting tool, which includes: a cutting tool housing, the interior thereof forming a cavity; a blade exit portal, penetrating through the cutting tool housing and communicating with the cavity; a blade holder, moved or locked in the cutting tool housing; a blade, mounted to the blade holder and disposed opposite the blade exit portal; when the blade holder is moved, the front end of the blade protrudes out of the cutting tool housing or retracts into the cutting tool housing through the blade exit portal; a blade holder moving device, for moving the blade holder in the cutting tool housing; and a protrusion length control device, for controlling the protrusion length of the blade outside the cutting tool housing.

Abstract: The present utility model discloses a utility knife with dual blades, comprising a housing having an opening at both ends, a blade carrier which is mounted and is movable within the housing, a movement assembly connected to the blade carrier for driving the blade carrier to respectively move in a direction towards both ends of the housing, wherein it further comprises a stop member. The blade carrier is provided with an abutment portion thereon, and the stop member has a stop portion being able to change its position with respect to the abutment portion, so that the blade carrier can move in a single direction so as to prevent the blade carrier from accidentally sliding and pushing the blade out to injure a user.

Abstract: Disclosed are a ceramic tile leveling bracket, pushing and clamping pliers and a ceramic tile leveling and laying system. The ceramic tile leveling and laying system comprises: a ceramic tile leveling bracket (1), an insertion block (2) and pushing and clamping pliers (3), wherein the ceramic tile leveling bracket (1) is provided at the junction between two adjacent ceramic tiles (4), one end of the insertion block (2) is inserted into an insertion block through hole (16) of the ceramic tile leveling bracket (1), and the pushing and clamping pliers (3) push and clamp the insertion block (2) into the insertion block through hole (16), so that an insertion block bottom surface (21) is tangent to upper surfaces of the two ceramic tiles (4). The ceramic tile leveling and laying system is easy to operate, and helps to improve the laying efficiency and laying quality.

Abstract: Disclosed are a ceramic tile leveling bracket, pushing and clamping pliers, and a ceramic tile leveling and laying system. The ceramic tile leveling and laying system comprises: a ceramic tile leveling bracket, an insertion block, and pushing and clamping pliers, wherein the ceramic tile leveling bracket is disposed at a junction of at least two adjacent ceramic tiles, one end of the insertion block is inserted into an insertion block receiving portion of the ceramic tile leveling bracket, and the pushing and clamping pliers push and clamp the insertion block into a ceramic tile leveling bracket such that a bottom face of the insertion block is tangent to upper surfaces of the ceramic tiles. The ceramic tile leveling and laying system is easy to operate, and improves the laying efficiency and laying quality.

Abstract: A hand tool provided with a first handle, a second handle, a first working portion, a second working portion and a working portion connecting mechanism. The first handle is fixedly connected to the first working portion, the second handle is pivotably connected to the second working portion, and the second working portion is connected to the first working portion through the working portion connecting mechanism, the second working portion has a first position and a second position, and the working portion connecting mechanism causes the second working portion to be moved from the first position to the second position when the second handle is moved from away from the first handle to closer to the first handle. The first position is the position where the second working portion is located away from the first working portion, and the second working portion is rotated and translated relative to the first working portion when the second working portion is in the second position.

Abstract: The present invention provides an opening-closing device including a first component, a second component and a third component. The second component is rotatably connected with the first component, and the third component is rotatably connected with the second component. The present invention further includes a mode switching device for switching operating modes of the opening-closing device. The operating modes include a conventional mode and a labor-saving mode. When the opening-closing device is in the conventional mode, the third component is fixed relative to the second component. When the opening-closing device is in the labor-saving mode, the third component is rotated in the opening direction relative to the second component during opening of the opening-closing device, and the third component is rotated in the closing direction relative to the second component during closing of the opening-closing device.

Abstract: The present invention provides a lighting equipment, which successively includes a lamp head portion, a connecting portion and a tail portion; the lighting equipment further includes a short distance light source, a long distance light source, a power supply and a control switch. The short distance light source and the long distance light source are arranged inside the lamp head portion, and the light emitting direction of the short distance light source is consistent with that of the long distance light source. The power supply is provided inside the connecting portion, a positive electrode and a negative electrode of which are electrically connected to two ends of the short distance light source and two ends of the long distance light source respectively. The control switch is used for controlling a light and shade state of the short distance light source and the long distance light source.

Abstract: The present invention provides a power-assisted folding knife, comprising a handle, a blade, a locking mechanism, an assisting mechanism and a second assisting mechanism. The blade is rotatably connected to the handle. The locking mechanism and the second assisting mechanism are provided inside the handle. The assisting mechanism is connected to the handle and the blade respectively. When the blade is in a folded position, the assisting mechanism and the second assisting mechanism are used for locking or unlocking the blade. When the blade is in an unfolded position, the locking mechanism is used for locking or unlocking the blade. When the power-assisted folding knife is unfolded, the assisting mechanism and the second assisting mechanism provide assisting force for the blade and/or the handle.

Abstract: The present invention provides an open-close device, including a first member, a second member, a third member and a fourth member; the second member is rotatably connected to the first member, the third member is rotatably connected to the first member, the fourth member is rotatably connected to the second member and rotatably connected to the third member, the open-close device further includes an angle adjusting device which is provided at a joint between the third member and the first member, for adjusting the bending angle of the third member with respect to the first member.

Abstract: The present invention provides an open-close device, including a first member, a second member, a third member and a fourth member; the second member is rotatably connected to the first member, the third member is rotatably connected to the first member, the fourth member is rotatably connected to the second member and rotatably connected to the third member; the open-close device further includes an angle adjusting device which is provided at a joint between the third member and the first member, for adjusting the bending angle of the third member with respect to the first member.

Abstract: The present invention discloses a manual tool having a retractable tool member, which further comprises a handle and a linkage member. The tool member is configured to be retractably moveable relative to the handle between an operating state and a retracting state under the driving of the handle and the linkage member.

Abstract: The present invention discloses a connecting structure, a connecting method and an article containing the connecting structure. The connecting structure includes a fastener, a first connecting member adjacent to the trailing end of the fastener and a second connecting member away from the trailing end of the fastener. The second connecting member is provided with a threaded connecting hole, which in the axial direction thereof is provided with thread matching with the form of thread of the fastener and having a central angle of at least 180 degrees. The first connecting member is provided with a connecting hole, and the fastener connects the two connecting members through the threaded connecting hole and the connecting hole. The connecting method achieves quick connecting with the connecting hole of the first connecting member by preloading the fastener to the threaded connecting hole, without being affected by the assembly space.

Abstract: The present invention discloses a ratchet clamp comprising a first clamping arm and a second clamping arm which are pivotally connected with each other via a connecting shaft so as to be opened and closed relative to each other, a ratchet assembly, a swing assembly and a control assembly provided between the first clamping arm and the second clamping arm; the ratchet toothed assembly has a plurality of first ratchet teeth and a plurality of second ratchet teeth which are juxtaposed and are misaligned with each other; the swing assembly and the ratchet toothed assembly are moved away from or towards each other with the connecting shaft as the axial center of rotation; a latch member of the control assembly has at least a first pawl and at least a second pawl, a wrench member of the control assembly is used for toggling the latch member to be moved, the first pawls and the second pawls are respectively engaged with the corresponding first ratchet teeth and second ratchet teeth when the latch member is moved to

Abstract: The invention discloses a storage shelf, comprising upright posts (1) and transverse beams (2), and further comprising shelf boards (3), wherein first reinforcement ribs (4) are provided on the transverse beams; and the first reinforcement ribs can both reinforce the transverse beams and serve as supporting parts for the shelf boards, having a simple structure without reducing the strength of the transverse beams. The transverse beams and the upright posts are directly connected by way of clamping, and can be assembled and disassembled conveniently.

Abstract: Disclosed is a wrench, which is used for wrenching a workpiece and comprises a unidirectional transmission mechanism. The unidirectional transmission mechanism comprises rollers, a first member and a second member at least partially sheathed in the first member. The first member is fixedly provided at a wrenching portion of the wrench, and the second member is used for mating with the workpiece. The directions of the rotating torque from the wrenching portion are a first direction and a second direction along the axis of rotation of the first member. With regard to one of the rotating torque of the first direction and the rotating torque of the second direction, the second member is stationary relative to the first member so as to output the rotating torque to the workpiece; and with regard to the other one thereof, the second member rotates relative to the first member without outputting the rotating torque to the workpiece.