Abstract: Various embodiments of the present disclosure provide a combustion-powered fastener driving tool fuel cell adapter for a fuel cell for a combustion-powered fastener driving tool, wherein the adapter is configured to reduce the chance of the adapter popping off of a sealing member attached to a fuel cell, wherein the adapter is configured to reduce the chance of the adapter untwisting from the sealing member.

Abstract: This driving tool includes: a pressure accumulator (26) in which a compressible gas is accumulated; a striking part which operates in a first direction to strike a fastener with a pressure of the compressible gas; and a driving part which causes the striking part to operate in a second direction opposite to the first direction and to increase the pressure of the pressure accumulator (26). The driving tool further includes: a cylinder chamber (98) in which the compressible gas to be supplied to the pressure accumulator (26) can be contained; a holder (44) forming the pressure accumulator (26) and the cylinder chamber (98); a piston (97) which is disposed in the holder (44) and is operable to reduce the volume of the cylinder chamber (98); and a switching valve (92) capable of connecting and disconnecting the cylinder chamber (98) and the pressure accumulator (26).

Abstract: A fastener driver includes a housing, a cylinder supported by the housing, and a moveable piston positioned within the cylinder. A driver blade is attached to the piston and movable therewith between a top-dead-center position and a driven or bottom-dead-center position. The driver blade includes a body having a first side and an opposite, second side with the driving axis passing therebetween, a plurality of teeth extending from the first side of the body, and a plurality of projections extending from the second side of the body. The body and the projections are bisected by a common plane. The teeth extend at an oblique angle from the first side of the body relative to the common plane.

Abstract: A driving tool includes a tool body, a flywheel, a driver, a pressing mechanism and a solenoid. The solenoid has an actuation part configured to linearly move in a specified direction from an initial position when the solenoid is activated. The pressing mechanism includes a holder turnably supported around a rotation axis relative to the tool body, and a roller rotatably supported by the holder. The holder is turnable between a first position in which the roller is apart from the driver and a second position in which the roller abuts on the driver and presses the driver toward the flywheel to thereby enable transmission of the rotational energy to the driver. The actuation part is configured to turn the holder from the first position to the second position while moving from the initial position.

Abstract: A driving tool includes a tool body, a flywheel, a driver and a pressing mechanism. The pressing mechanism is disposed on a side opposite to the flywheel across the driver in a facing direction in which the flywheel and the driver face each other. The pressing mechanism includes a spring mechanism and a pressing roller. The spring mechanism includes a first spring part and a second spring part and is configured to be displaced along with forward movement of the driver. The pressing roller is configured to press the driver toward the flywheel in the facing direction by a biasing force of the spring mechanism in a process of the forward movement of the driver, to thereby enable transmission of the rotational energy to the driver. A spring constant of the whole spring mechanism varies according to an amount of displacement of the whole spring mechanism.

Abstract: An aircraft panel production method has: a step in which a holding jig holds a body panel, which has a plurality of plate-like members having a curved cross-sectional shape, such that the cross section of the body panel has an upwardly bulging curved shape; a step in which the plate-like members of the body panel held by the holding jig are overlapped with each other and the overlapping portions are joined by a rivet; a step in which the holding jig, which is holding the body panel of which the plate-like members have been joined to each other, is moved; and a step in which a frame that follows the curved shape of the body panel is joined, by a rivet, to the plate-like members of the body panel which is held by the holding jig which has been moved.

Abstract: A three-dimensional mini-plate with an oblique orientation for use in immobilizing fractures in facial bones such as the mandible. The plate's oblique orientation permits it to be better matched to oblique fractures such that its edges do not interfere with tooth roots or the inferior margin of the mandible.

Abstract: To facilitate mounting of a second member on a first member having a plate shape while the first member is supported in a state of being deformable due to gravity. A method for manufacturing a component includes: a step (S13) where a supporting robot supports a skin having a plate shape in a state where the skin is deformable due to gravity, and a support state of the skin is changed based on teaching data based on a deformed shape of the skin, which is recorded in advance in a storage unit and which is obtained at the time of mounting a frame on the skin; and a step (S15) where a mounting robot makes the frame overlap with the skin where a support state is changed.

Abstract: A processing device for the assembly of an aircraft encompasses a positioning frame, a guide device and a movable tool arm. The positioning frame can be attached to a segment of a hall floor. The guide device is movably guided on the positioning frame. The movable tool arm is attached to the guide device, and its free end exhibits a tool holder. The processing method for the assembly of aircraft encompasses the steps of providing a positioning frame on a segment of the hall floor, and guiding a guide device on the positioning arm. The guide device here exhibits a movable tool arm, and a free end of the tool arm exhibits a tool holder.

Abstract: A staple cartridge is disclosed. The staple cartridge comprises a cartridge body including staple cavities and staples removably stored in the staple cavities. The staple cartridge further comprises a firing member configured to eject the staples from the staple cavities. The staples and staple cavities include features which reduce friction forces between the staples and the staple cavities when the firing member ejects the staples from the staple cavities. Each of the staples comprises a base including a drive portion and staple legs extending from the base and, in at least one instance, each of the staple cavities includes a proximal guide and a distal guide configured to guide the staple legs of the staple positioned therein as it is ejected from the staple cavity. In certain instances, each of the staple cavities further includes an intermediate guide offset from the proximal guide and the distal guide.

Abstract: A staple cartridge is disclosed. The staple cartridge comprises a cartridge body, staples removably stored in the cartridge body, and a firing member. The firing member is configured to directly engage the staples to eject the staples from the staple cavities. The firing member includes one or more channels and/or rails configured to orient the staples before, during, and/or after the staples contact an anvil positioned opposite the staple cartridge.

Abstract: A circular stapler and a staple head assembly thereof are disclosed. The staple head assembly comprises a staple barrel assembly and an anvil assembly. The anvil assembly includes an anvil ring and an anvil shaft which are fixedly connected to each other, where the anvil shaft is capable of sliding along the longitudinal direction in an anti-expansion tube. The staple barrel assembly includes a staple barrel, a staple pusher piece arranged within the staple barrel and a staple cartridge fixed at a distal end of the staple barrel.

Abstract: A loading unit (100) including a shipping member (200) is provided. The shipping member (200) is receivable on a distal end of the loading unit (100) in a first orientation to prevent movement of a pusher assembly (130) from a first to a second position and in a second orientation to effect separation of the loading unit (100) from a surgical stapling device (10).

Abstract: Surgical methods for closing a gastrotomy. The surgical method for closing an opening in an organ wall comprises positioning a distal end portion of a steerable overtube adjacent a portion of the organ wall through which the opening extends. The surgical method further comprises inserting a flexible clip magazine into the steerable overtube. The surgical method comprises grasping tissue through which the opening extends and drawing a portion of the grasped tissue into a clamping position between upper and lower clip arms of a distal-most tissue apposition clip supported within a distal end of the clip magazine. The surgical method further comprises advancing the distal-most tissue apposition clip onto the portion of grasped tissue.

Abstract: A calibration device is used for calibrating a position of a cutting tool relative to a machine rotation axis, such as for setting the position of the small boring tool for a CNC machine. The device includes a body with a machine contact surface, a tool contact surface, a machine rotation axis locating surface and a worm access opening. An anti-backlash worm gear assembly is mounted in the body and includes a worm in contact with the wheel. A bubble level is attached to rotate with the wheel with respect to the body responsive to rotation of the worm. At least one anti-backlash wedge is biased into contact with the worm.

Abstract: An apparatus for securing a vertebra during healing of a fracture within a pars area of the vertebra is described. In certain embodiments, the apparatus is a plate that has an outer shape similar to a shape of a pedicle and/or lamina of the vertebra, and an inner section that facilitates access to the pars area when the plate is secured to the vertebra.

Abstract: A uterine manipulator includes a shaft configured to be inserted into a cervix and a colpotomizer assembly configured to move along the shaft. The shaft includes multiple ruler markings printed along a portion of the shaft. The colpotomizer assembly includes a sleeve that includes a rotatable locking member configured to compress the shaft in a manner that locks the colpotomizer assembly in position along the shaft when the rotatable locking member is depressed against the shaft. The rotatable locking member includes a cam roller configured to compress the shaft when the rotatable locking member is depressed towards the shaft.

Abstract: A fixation device and method for the subcutaneous fixation of bone fragments. A fixation mesh is formed by the intersection of a plurality of linear legs that are interconnected in sagittal planes to form linear sagittal lines and a plurality of crimped legs that are interconnected in transverse planes to form transverse lines. The mesh resists expansive forces that are created in the linear sagittal lines and a compressive stress is created in the transverse lines when tensile loads are applied to the linear sagittal lines resulting in a device that minimizes the gap distance between bone fragments.

Abstract: Systems and methods are provided herein that provide for remote leveling and positioning. An embodiment includes a leveling device assembly. Another embodiment provides a system including a leveling device assembly and a plurality of audio devices. Further embodiments provide for systems having a plurality of leveling device assemblies and appliances that are configured to couple with the leveling device assembly.

Abstract: According to one aspect of the application, a device for driving a fastening element into a substrate has an energy-transfer element for transferring energy to the fastening element. The energy-transfer element can move preferably between a starting position and a setting position, wherein the energy-transfer element is located, before a driving-in procedure, in the starting position and, after the driving-in procedure, in the setting position. According to another aspect of the application, the device comprises a mechanical-energy storage device for storing mechanical energy. The energy-transfer element is then suitable preferably for transferring energy from the mechanical-energy storage device to the fastening element.

Abstract: The invention provides, in one aspect, a pneumatic fastener driver including a cylinder and a piston positioned within the cylinder. The piston is moveable between a top-dead-center position and a bottom-dead-center position. The driver also includes a magnetic latch emitting a magnetic field that magnetically attracts the piston and is capable of holding the piston in the top-dead-center position with a magnetic force. The magnetic latch is adjustable to vary the magnetic force acting on the piston for driving fasteners into a workpiece at different depths.

Abstract: A fastener actuation system for driving fasteners into a work surface separated a significant distance from a user, the system comprising a fastener actuation tool coupled to a pole assembly, the assembly including a lockout mechanism disposed within the tool. The tool may have a firing pin assembly configured such that depression of the barrel assembly against the work surface loads a firing pin into a ready-to-fire position. In addition, the tool may have a trigger sleeve slidable within the tool housing and having a ramp surface such that forward motion of the trigger sleeve may cause a trigger sear to move along the ramp surface until a point where the sear disengages and the firing pin fires. The lockout mechanism may include a ball and a receptacle, where the receptacle receives the ball if the tool is in an acceptable orientation and does not receive the ball otherwise.

Abstract: An anvil assembly having a sliding sleeve is provided. The anvil assembly includes an anvil center rod assembly, a head assembly pivotally secured to the anvil center rod assembly, and a sleeve member slidably disposed about the anvil center rod assembly. The sleeve member is configured to slide relative to the anvil center rod assembly as the head assembly pivots relative to the anvil center rod assembly.

Abstract: In an electric power tool in which a metal front housing that accommodates a driving mechanism is assembled to the front of a main housing that accommodates a motor, an output shaft is protruded from the distal end of the front housing, and the outer periphery of the front housing is protected by a cylindrical transparent cover made of synthetic resin, a decorative pattern is formed on the inner surface of the transparent cover. The decorative pattern is formed of bumps and dips formed on the inner surface.

Abstract: According to one aspect of the application, a device for driving a fastening element into a substrate has an energy-transfer element for transferring energy to the fastening element. The energy-transfer element can move preferably between a starting position and a setting position, wherein the energy-transfer element is located, before a driving-in procedure, in the starting position and, after the driving-in procedure, in the setting position. According to another aspect of the application, the device comprises a mechanical-energy storage device for storing mechanical energy. The energy-transfer element is then suitable preferably for transferring energy from the mechanical-energy storage device to the fastening element.

Abstract: A fuel delivery system for use with a combustion fastener driver including a cylinder head frame, the system includes a fuel cell with an outer shell having a closed lower end and an open upper end, a closure crimped over the upper end and defining an opening for accommodating a reciprocating valve stem, a fuel cell adapter frictionally engaging the closure and including a flange configured for suspending the fuel cell in a tool fuel cell chamber. The adapter includes a collar configured for receiving the valve stem and being suspended for restricted vertical movement relative to the flange. A stem receiver block is connectable to the cylinder head frame and includes a stem engagement portion configured for directly and sealingly engaging an end of the valve stem, the stem engagement portion being in fluid communication with an internal receiver passage constructed and arranged for delivering fuel to a combustion chamber.

Abstract: A fuel cell adapter to be received in a combustion tool fuel cell cavity, the cavity having a predetermined diameter, and the adapter having a post extending longitudinally along an axis. First and second platforms are positioned at a first and second end of the post and they extend laterally outwardly from the post to occupy a distance slightly less than the predetermined diameter of the fuel cell cavity. A flange extends from the post between the first and second ends of the post and has at least one portion extending laterally outwardly from the post to occupy a distance, when combined with the post, slightly greater than the predetermined diameter of the fuel cell cavity. The flange is formed of a resilient material and a thickness so as to permit the flange to be deformed as the adapter is inserted into the fuel cell cavity.

Abstract: A blind guide work contact tip for mounting to a drive probe of a fastening tool is shaped in a manner which allows for an angled nail placement, such as 45 degree into a workpiece. The blind guide work contact is a one-piece attachment which is fitted around the existing drive probe and includes a body and two wings which extend therefrom forming a channel through which a fastener passes into the workpiece. The body has a work surface with a peak and sloped slides adjacent each side of the peak at approximately 45 degrees. The sloped surfaces allows the blind guide work contact tip to better access corners and angled spaces than previous work contact tips. The work contact tip also has a flat portion at the peak of the work surface so as to not inhibit face nailing.

Abstract: A driver which strikes a fastener to drive it into a target object has a cylinder and a driver blade which is reciprocably housed in the cylinder and is driven to reciprocate by pressure of fluid supplied into the cylinder to strike the fastener, and the driver blade is made up of a shaft part and a piston provided at one end of the shaft part and a damping member is incorporated in the shaft part.

Abstract: Disclosed is a stapling apparatus having an improved structure capable of smoothly rotating a stapler at both lateral sides of the stapling apparatus. The stapling apparatus includes a base frame including a horizontal slot, branch slots branching from the horizontal slot, rotation restricting plates protruding from a branch portion between the branch slots and the horizontal slot, respectively, and a movement guide shaft provided in parallel to the horizontal slot, a movable frame movable to a left or a right on the base frame, and a bucket for rotating a stapler, in which a pair of first guide rollers fitted into the horizontal slot and a second guide roller protruding to an outside of the horizontal slot are fixed to a lower portion of the bucket, and one of the first guide rollers is guided to move to the branch slot from the horizontal slot.

Abstract: A stapler (1) by which a workpiece (11), preferably a sheaf of papers, is stapled together with a staple, which stapler (5) comprises a stapling head (2) accommodating staples and a driver (6) and connected pivotably by a pivot pin (4) to a bottom part (3) which comprises a lower element (9) and an upper element (8) which are connected to one another in such a way that they can be moved towards and away from one another (P) and which in an initial state are held in a locking position at a distance from one another by a locking device (17), with forming means (14, 15) arranged between the upper and lower elements, which forming means, when the staple has been fully driven into the workpiece at its insertion area (26) by the driver, are activated to bend the staple legs towards the workpiece as a result of the upper and lower elements moving towards one another when the locking device is released by an activating means (22) which is part of the locking device (17) being acted upon by an unlocking means (7) disp

Abstract: An adjustable exhaust assembly for a pneumatic fastening tool having body and a handle extending from the body, the handle defining an inlet channel for receiving input of pressurized gas and an outlet channel for outputting exhaust. The adjustable exhaust assembly includes a base non-rotatably attachable to an end of the handle opposite the body. The base has a plate and a boss extending from the plate. The boss is configured to receive an air hose and defining an inlet opening configured to direct compressed air to the inlet channel. The plate has an outlet opening in communication with the outlet channel. A substantially annular and cap is rotatably received about the boss. The cap defines a substantially annular channel in communication with the outlet opening of the base and an outlet port defined in a portion of a circumferential wall of the annular cap and in communication with the annular channel.

Abstract: An oscillation reducing suspension device for a fan motor of a combustion-powered tool includes a holding web member mounted on a cylinder head and having a central opening to be sleeved on the motor, first and second retaining members disposed to hoop around the motor, and first and second damping members each disposed between the holding web member and a respective one of the first and second retaining members so as to counteract an axial vibration force, thereby minimizing the impact of the axial vibration force.

Abstract: A stapler includes a base and a stapler remover. The base defines a receiving room. The receiving room receives backup staples. The stapler remover is rotatably mounted on the base. The staple remover includes a tilting portion, which is located out of the base. The tilting portion is configured to be arranged in different positions with respect to the base.

Abstract: A blind guide work contact tip for mounting to a drive probe of a fastening tool is shaped in a manner which allows for an angled nail placement, such as 45 degree into a workpiece. The blind guide work contact is a one-piece attachment which is fitted around the existing drive probe and includes a body and two wings which extend therefrom forming a channel through which a fastener passes into the workpiece. The body has a work surface with a peak and sloped slides adjacent each side of the peak at approximately 45 degrees. The sloped surfaces allows the blind guide work contact tip to better access corners and angled spaces than previous work contact tips. The work contact tip also has a flat portion at the peak of the work surface so as to not inhibit face nailing.

Abstract: A staple refill including a refill body accommodating sheet-type connected staples. The refill body includes a bottom wall, a right wall provided on a right side of the bottom wall and formed with a vertically extending right guide slot, and a left wall provided on a left side of the bottom wall and formed with a vertically extending left guide slot. A pressing member is provided in the refill body in a movable manner to press the sheet-type connected staples. The pressing member includes a guide shaft guided along the right and left guide slots. The guide shaft includes a right end portion protruding outside the right wall through the right guide slot, and a left end portion protruding outside the left wall through the left guide slot.

Abstract: An electromagnetic nail gun with a lever, comprising a handle for holding the nail gun and triggering the operation of the nail gun, an electromagnetic lever driving device for driving nails with variable speeds through the movement of the lever, wherein electromagnetism is used as driving force, a firing pin slideway for allowing the lever to move therein, and a muzzle magazine assembly for loading nails inside. The present invention uses the magnetism as driving force directly and then applies the lever and variable speed drive to launch nails. Therefore, the structure of the present invention is very simple, light, the manufacture cost is decreased drastically, vibration and noise when used are quite little, very convenient to operate, dispense with the air compressor, easy to carry around.

Abstract: A fastening machine 1 is provided, which prevents the tip member 131 from wear and improve its durability as well as align a material into which a fastener is to be driven. The fastening machine 1 is provided with a housing 2, a handle 2A extended from the housing 2, a nose 3 extended from the housing 2 and comprising an ejecting mouth 6 to fire a fastener 25 and a tip member 131 arranged at the tip of nose 3 in the direction of ejecting the fastener 25. The tip member 131 is characterized by comprising a super-hard material member 19 in the side facing a material into which a fastener is to be driven and in the side opposite to the direction of extending the handle 2A.

Abstract: A method for replacing a tag tool needle includes securing at least a portion of a tag tool needle coupled to a tag tool in a needle container; and removing the tag tool needle from the tag tool with the needle container. A tag tool needle container includes a first tubular aperture adapted to receive at least a portion of a first tag tool needle therein, where the first tubular aperture has a compression-fit adapted to securely enclose the portion of the first tag tool needle when urged over the first tag tool needle; and a second tubular aperture coupled to the first tubular aperture and adapted to receive at least a portion of a second tag tool needle therein, where the second tubular aperture has a compression-fit adapted to adapted to securely enclose the portion of the second tag tool needle when urged over the second tag tool needle.

Abstract: A refill for staples, which can not be removed from a cartridge unless all sheet-type connected staples in a stapler body are delivered. A refill for staples is installed in a detachable manner in a stapler body, and includes a refill body which holds the sheet-type connected staples, and a pressing member which presses the sheet-type connected staples. A delivery port delivering the sheet-type connected staples and a locking plate provided with a locking section which locks a locked section in the stapler body are formed in the refill body. When the sheet-type connected staples are pressed, the pressing member is engaged with the locking plate not to allow rotation of the locking plate, and, when the sheet-type connected staples are not pressed, the pressing member is disengaged from the locking plate to allow rotation of the locking plate. Thereby, the locking section of the locking plate can be removed from the locked section in the stapler body.

Abstract: A system and method for positioning a tool. The system includes a base member configured to contact a first decking member and a second decking member; at least one base guide including a first end and an opposing second end, the first end coupled to the base member, the at least one base guide configured to position the base member relative to the first decking member and the second decking member; and an adjustable section coupled to the base member, the adjustable section configured to allow adjustment of at least one of a position and an angle of the tool relative to the base member.

Abstract: A staple refill includes a refill body accommodating sheet-type connected staples. The refill body includes a bottom wall, a right wall provided on a right side of the bottom wall, a left wall provided on a left side of the bottom wall, and a front wall provided on front sides of the right and left walls. A pressing member is provided in the refill body in a movable manner to press the sheet-type connected staples, the pressing member including a first guide projection at a front end of the pressing member configured to contact an inner surface of the front wall.

Abstract: A setting tool for driving in fastening elements includes a setting piston (20) axially displaceable in a piston guide (13) which is adjoined by a bolt guide (12), and a piston stop device (30) for the setting piston (20) and arranged at an end region of the piston guide (13) adjacent to the bolt guide (12) and having a damping element (31) supported against a stop (15), and a stop member (32) for the setting piston (20) and adjoining the damping element (31) in a direction toward the piston guide (13), with the damping element (31), the stop member (32) and the stop (15) having respective surfaces (33, 34; 35, 36) arranged axially opposite each other at least one of which is formed as an inclined surface (S) forming with a respective opposite surface an angle of from 2° to 20°.

Abstract: A blind guide work contact tip for mounting to a drive probe of a fastening tool is shaped in a manner which allows for an angled nail placement, such as 45 degree into a workpiece. The blind guide work contact is a one-piece attachment which is fitted around the existing drive probe and includes a body and two wings which extend therefrom forming a channel through which a fastener passes into the workpiece. The body has a work surface with a peak and sloped slides adjacent each side of the peak at approximately 45 degrees. The sloped surfaces allows the blind guide work contact tip to better access corners and angled spaces than previous work contact tips. The work contact tip also has a flat portion at the peak of the work surface so as to not inhibit face nailing.

Abstract: It is an object of the invention to provide a technique that contributes to improved gripping characteristics in a hand-held power tool. A power tool for performing a predetermined operation by driving a tool bit includes a tool body 101 and a handgrip 103 formed on the tool body 101. The handgrip 103 has a plurality of ribs 117 formed in parallel on a grip face which is held by user's fingers and protruding from the grip face. The ribs 117 extend along a contour of the grip face in a longitudinal direction of the handgrip, and in the circumferential direction of the handgrip 103, each of the ribs 117 has a ridged shape which is engaged in one direction but not engaged in the other direction with balls of fingertips of at least third to fifth fingers of the user's hand.

Abstract: An apparatus for installing a hidden fastener in the course of attaching a plank to a joist includes a power tool with a retainer for holding the hidden fastener. The hidden fastener is placed on the retainer so that an attachment opening formed through the hidden fastener is in registration with a bore formed in the retainer for receiving a securing member. The power tool is used to position the hidden fastener in engagement with the plank, and to drive a securing member from the bore of the retainer through the attachment opening of the hidden fastener.

Abstract: A staple refill includes a refill body accommodating sheet-type connected staples. The refill body includes a bottom wall, a right wall provided on a right side of the bottom wall, a left wall provided on a left side of the bottom wall, a front wall provided on front sides of the right and left walls. A locking plate is provided on rear sides of the right and left walls. A pressing member is provided in the refill body in a movable manner to press the sheet-type connected staples. The front wall includes a first locking section protruding forward from a lower portion of the front wall. The locking plate includes a second locking section.

Abstract: A staple refill includes a refill body accommodating sheet-type connected staples. The refill body includes a bottom wall, a right wall provided on a right side of the bottom wall and formed with a vertically extending right guide slot, and a left wall provided on a left side of the bottom wall and formed with a vertically extending left guide slot. A pressing member is provided in the refill body in a movable manner to press the sheet-type connected staples, the pressing member including a guide shaft guided along the right and left guide slots. The guide shaft includes a right end portion protruding outside the right wall through the right guide slot, and left end portion protruding outside the left wall through the left guide slot.

Abstract: An auto hammer having a housing having a grip portion defining a central axis and a head assembly including a striking device which has a striking rod defining a central axis. The striking device is pivotable relative to the grip portion and the angle between the central axis of the grip and the central axis of the striking rod can range between 60° and 180°. The auto hammer thus provides a pivotable striking device and is thereby suitable for different working circumstances.

Abstract: A nailer device is carried within a housing having a nozzle portion wherein the nozzle portion is connected with the housing via a head portion of the housing. The nozzle portion includes a sleeve, a fixing member, and a magnetic member located between the sleeve and the fixing member. The fixing member is mounted on the sleeve and the fixing member has a groove in which the magnetic member is arranged.