Fastener driver

Abstract

A fastener driver, wherein a striker is connected to a piston; a driving member drives a striking assembly to move backward to the top-dead-center position; an energy storage device drives the striking assembly to move forward to the bottom-dead-center position to output a striking force; and the distance L3 between the top-dead-center position and the bottom-dead-center position is defined as the stroke of the striking assembly. The fastener driver is configured to drive a fastener to move within a preset length L4, and the ratio of the stroke of the striking assembly to the preset length is less than or equal to 1.5.

Description

Fastener Drivers

[0001] This application claims the priority of Chinese patent application No. 202311252952.8 filed with the China Patent Office on September 26, 2023, the priority of Chinese patent application No. 202311253589.1 filed with the China Patent Office on September 26, 2023, the priority of Chinese patent application No. 202322626766.8 filed with the China Patent Office on September 26, 2023, the priority of Chinese patent application No. 202311253890.2 filed with the China Patent Office on September 26, 2023, and the priority of Chinese patent application No. 202311253890.2 filed with the China Patent Office on September 26, 2023. The present application claims priority of the Chinese patent application No. 202311253522.8 filed with the China Patent Office on September 6, 2023, the Chinese patent application No. 202311246522.5 filed with the China Patent Office on September 26, 2023, the Chinese patent application No. 202322624189.9 filed with the China Patent Office on September 26, 2023, and the Chinese patent application No. 202421115920.3 filed with the China Patent Office on May 21, 2024. The entire contents of the above applications are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of power tools, for example, to a fastener driver. Background Art

[0003] A fastener driver in the related art is generally used to secure a workpiece. A user injects a fastener into the workpiece to secure the workpiece. In the fastener driver in the related art, the fastener driver injects a fastener in each injection cycle.

[0004] In the related art, when a user uses a fastener driver, he needs to carry or lift the fastener driver by hand. The fastener driver in the related art is large in size, has low operating comfort, and is inconvenient to use.

[0005] This section provides background information related to the present application which is not necessarily prior art.

[0006] Summary of the Invention

[0007] An object of the present application is to solve or at least alleviate a part or all of the above problems. To this end, an object of the present application is to provide a fastener driver that is easy and comfortable to use.

[0008] To achieve the above objectives, this application adopts the following technical solutions:

[0009] In the first aspect, an embodiment of the present application provides a fastener driver, comprising: a striking assembly, comprising a piston and a firing pin, the firing pin being connected to the piston; a transmission mechanism, comprising a driving member configured to drive the striking assembly to move backward to a top dead center position; an energy storage device, configured to drive the striking assembly to move forward to a bottom dead center position to output a striking force; the distance L3 between the top dead center position and the bottom dead center position is defined as the stroke of the striking assembly, the fastener driver is configured to drive the fastener within a preset length L4, and the ratio of the stroke of the striking assembly to the preset length is less than or equal to 1.5.

[0010] In some embodiments, the stroke is less than or equal to 80 mm.

[0011] In some embodiments, the length of the firing pin is less than or equal to 165 mm.

[0012] In some embodiments, the firing pin includes a toothed portion, and a ratio of a length of the toothed portion to a predetermined length is less than or equal to 1.21.

[0013] In some embodiments, the driving member drives the striker to move from a bottom dead center position, sequentially through a switching position and a parking position to a top dead center position.

[0014] In some embodiments, a ratio of a travel distance of the striker from the rest position to the top dead center position to a travel distance of the striker from the shift position to the top dead center position is less than 1.

[0015] In some embodiments, the travel distance of the striker from the transition position to the top dead center position is greater than or equal to 3.7 mm and less than or equal to 4.8 mm.

[0016] In some embodiments, the travel distance of the striker from the rest position to the top dead center position is greater than or equal to 1.6 mm and less than or equal to 2.6 mm.

[0017] In some embodiments, a ratio of a travel distance of the striker from the rest position to the top dead center position to a travel distance of the striker from the transition position to the top dead center position is greater than or equal to 0.5 and less than or equal to 0.9.

[0018] In some embodiments, the firing pin includes a main body extending along a first straight line direction and a plurality of engaging teeth arranged on the main body, the driving member includes a plurality of driving teeth arranged to engage with the firing pin to drive the firing pin, and the plurality of engaging teeth include a first engaging tooth that stops the firing pin in a stop position.

[0019] In some embodiments, the first meshing tooth contacts the driving tooth at a contact point and generates a force perpendicular to the tangent of the contact point. When the striker moves from the conversion position to the top dead center position, the angle between the direction of the force and the direction of the first straight line gradually increases.

[0020] In some embodiments, the fastener driver includes a guide assembly configured to guide movement of the fastener, the guide assembly having a length less than or equal to 108 mm.

[0021] In some embodiments, the fastener driver has a length in the front-to-back direction of less than or equal to 295 mm.

[0022] In some embodiments, the energy storage device includes a first cylinder that accommodates at least a portion of the piston, the first cylinder includes a first inner wall that contacts the piston, the first inner wall has a circular first cross-section, and the ratio of the stroke of the striker to the diameter of the first cross-section is greater than or equal to 1.7 and less than or equal to 2.8.

[0023] In some embodiments, the product of the first cross section and the stroke is defined as the gas displacement, and the ratio of the striking energy output by the fastener driver to the gas displacement is greater than or equal to 0.3 J / cm 3 and less than or equal to 0.7J / cm 3 .

[0024] In the second aspect, an embodiment of the present application provides a fastener driver, comprising: a striking assembly, comprising a piston and a firing pin, the firing pin being connected to the piston; a transmission mechanism, comprising a driving member configured to drive the striking assembly to move backward to a top dead center position; an energy storage device, configured to drive the striking assembly to move forward to a bottom dead center position to output a striking force; the length of the fastener driver in the front-to-back direction is less than or equal to 295 mm.

[0025] In a third aspect, an embodiment of the present application provides a fastener driver, comprising: a striking assembly, comprising a piston and a firing pin, the firing pin being connected to the piston; a transmission mechanism, comprising a driving member configured to drive the striking assembly to move backward to a top dead center position; an energy storage device, configured to drive the striking assembly to move forward to a bottom dead center position to output a striking force, the energy storage device comprising a first cylinder accommodating at least a portion of the piston, the first cylinder comprising a first inner wall in contact with the piston, the first inner wall having a circular first cross-section; the distance between the top dead center position and the bottom dead center position is defined as the stroke of the striking assembly, and the ratio of the stroke of the firing pin to the diameter of the first cross-section is greater than or equal to 1.7 and less than or equal to 2.8.

[0026] In some embodiments, the energy storage device includes a second cylinder, at least a portion of the first cylinder is accommodated in the second cylinder, the second cylinder includes a second inner wall, the second inner wall has a circular second cross-section, and the ratio of the diameter of the first cross-section to the diameter of the second cross-section is greater than or equal to 0.6 and less than or equal to 0.7.

[0027] In some embodiments, the diameter of the first cross section is greater than or equal to 28 mm and less than or equal to 36 mm.

[0028] In some embodiments, the product of the first cross section and the stroke is defined as the gas displacement, and the ratio of the striking energy output by the fastener driver to the gas displacement is greater than or equal to 0.3 J / cm 3 and less than or equal to 0.7J / cm 3 .

[0029] In a fourth aspect, an embodiment of the present application provides a fastener driver, comprising: a striker, configured to output striking force to drive the fastener into a workpiece; a transmission mechanism, configured to drive the striker to move backward at least to a stop position; a motor, configured to drive at least the transmission mechanism; a controller, connected to the motor; a detection mechanism, connected to the controller, the detection mechanism being configured to detect the position of a moving part, and to send a detection signal when the moving part is in a first preset position range to allow the controller to send a control signal; when the moving part reaches a second preset position before the stop position, or at a first preset time before the moving part reaches the stop position, the controller sends a control signal to control the motor to rotate a preset number of circles or to brake after the second preset time.

[0030] In some embodiments, the transmission mechanism includes a driving member including a plurality of driving teeth configured to engage with the striker to drive the striker.

[0031] In some embodiments, the first preset position range has a first boundary position, which defines that when the center point of the moving part is at the stop position and the first boundary position, the angle formed by the rotation point of the driving part as the vertex is greater than or equal to 10 degrees and less than or equal to 60 degrees.

[0032] In some embodiments, the striker includes a main body extending along a first straight line direction and a plurality of meshing teeth arranged on the main body, the plurality of meshing teeth include a first meshing tooth that stops the striker in a stop position, the plurality of driving teeth include a first driving tooth that is arranged to engage with at least the first meshing tooth, and the angle between the center point of the moving part and the center point of the first driving tooth with the rotation center of the driving part as the vertex is greater than or equal to 5 degrees and less than or equal to 30 degrees.

[0033] In some embodiments, the moving member is a magnetic element.

[0034] In some embodiments, the surface magnetic field strength of the magnetic element is greater than or equal to 2800 Gs and less than or equal to 3600 Gs.

[0035] In some embodiments, the first preset time is greater than or equal to 20 ms and less than or equal to 30 ms.

[0036] In some embodiments, the preset number of turns is greater than or equal to 1 turn and less than or equal to 5 turns.

[0037] In some embodiments, the second preset time is greater than or equal to 4 ms and less than or equal to 20 ms.

[0038] In some embodiments, the travel distance of the striker from reaching the first preset position range to the stop position is greater than or equal to 4 mm and less than or equal to 10 mm.

[0039] In a fifth aspect, an embodiment of the present application provides a fastener driver, comprising: a striking assembly, comprising a firing pin configured to output striking force to drive the fastener into a workpiece; an energy storage device, configured to drive the firing pin to move forward to output striking force; a main shell, supporting at least part of the energy storage device; a grip, connected to the main shell; a transmission mechanism, configured to drive the firing pin to move backward; and a motor, configured to at least drive the transmission mechanism; wherein the center line of the grip is at least partially disposed between the center line of the energy storage device and the center line of the motor.

[0040] In some embodiments, the fastener driver has a center of gravity, and the centerline of the grip portion is at least partially disposed between the centerline of the energy storage device and the center of gravity.

[0041] In some embodiments, the fastener driver includes a coupling portion configured to removably mount a battery pack that provides energy to the motor, wherein a centerline of the coupling portion is at least partially disposed between a centerline of the energy storage device and a centerline of the motor.

[0042] In some embodiments, the center line of the coupling portion and the center line of the gripping portion are in the same plane.

[0043] In some embodiments, the striking assembly further includes a piston, the energy storage device includes a first cylinder accommodating at least a portion of the piston, and the centerline of the grip is at least partially disposed between the centerline of the first cylinder and the centerline of the motor.

[0044] In some embodiments, the centerline of the grip is at least partially disposed between the centerline of the striker and the centerline of the motor.

[0045] In some embodiments, the center line of the grip portion is parallel to the center line of the energy storage device, and the distance between the center line of the grip portion and the center line of the energy storage device is greater than or equal to 0.5 mm and less than or equal to 10 mm.

[0046] In some embodiments, the main shell includes a first shell and a second shell that are joined along a joining surface, and the joining surface of the first shell and the second shell passes through the center line of the grip portion and the center line of the energy storage device.

[0047] In some embodiments, the fastener driver includes a trigger configured to activate the fastener driver, with a centerline of the trigger being disposed at least partially between a centerline of the energy storage device and a centerline of the motor.

[0048] In some embodiments, the motor is disposed in front of the handle.

[0049] In a sixth aspect, an embodiment of the present application provides a fastener driver, comprising: a firing pin, configured to output striking force to drive a U-shaped fastener into a workpiece; an energy storage device, configured to drive the firing pin to move to output striking force; a guide assembly, configured to at least guide the fastener into the workpiece; the guide assembly comprises: a first guide structure, preventing at least two legs of the fastener from approaching each other.

[0050] In some embodiments, the guide assembly includes a second guide structure that prevents at least two legs of the fastener from moving away from each other.

[0051] In some embodiments, the guide assembly includes a guide surface configured to contact the at least two legs, and the first guide structure is raised relative to the guide surface.

[0052] In some embodiments, the fastener further includes a connecting portion connecting the at least two legs, wherein the connecting portion is configured to contact the first guide structure.

[0053] In some embodiments, the guide assembly includes a first guide member and a second guide member disposed facing the first guide member, and the first guide structure and the second guide structure are disposed on the first guide member.

[0054] In some embodiments, at least a portion of the first guide member is located above the second guide member.

[0055] In some embodiments, the first guide structure is configured to guide the movement of the striker.

[0056] In some embodiments, the striker includes a guide groove configured to engage with the first guide structure, and a ratio of the guide groove to a length of the striker in the front-to-rear direction is greater than or equal to 0.5 and less than or equal to 0.7.

[0057] In some embodiments, the guide assembly extends substantially along a first straight direction, and after contacting the guide assembly, the fastener extends in a direction inclined relative to the first straight direction at an angle greater than or equal to 0 degrees and less than or equal to 8 degrees.

[0058] In some embodiments, the guide assembly extends substantially along a first linear direction, the guide assembly includes an input port for the fastener to pass through, and the fastener driver includes a lifting member configured to move the fastener through the input port, the lifting member being inclined relative to the first linear direction.

[0059] In the seventh aspect, an embodiment of the present application provides a fastener driver, comprising: a firing pin, which is configured to output a striking force; a transmission mechanism, comprising a driving member configured to drive the firing pin to move; the firing pin comprises: a main body, extending along a first straight line direction; a plurality of meshing teeth, arranged on the main body, the plurality of meshing teeth including a first meshing tooth that stops the firing pin at a stop position; the driving member comprises: a driving tooth, which is configured to engage with the plurality of meshing teeth to drive the firing pin from a lower stop position, through a conversion position and a stop position to an upper stop position in sequence; the first meshing tooth contacts the driving tooth at a contact point, and generates a force perpendicular to a tangent of the contact point, and when the firing pin moves from the conversion position to the upper stop position, the angle between the direction of the force and the first straight line direction gradually increases; the ratio of the travel distance of the firing pin from the stop position to the upper stop position to the travel distance of the firing pin from the conversion position to the upper stop position is less than 1.

[0060] In some embodiments, the first engaging tooth has an outer contour for engagement with the driving tooth, the outer contour having a straight portion and an arcuate portion, and in the switching position, the driving tooth transitions from engagement with the straight portion to engagement with the arcuate portion.

[0061] In some embodiments, the angle between the straight portion and the first straight direction is greater than or equal to 87 degrees and less than or equal to 105 degrees.

[0062] In some embodiments, the driving member is configured to rotate around a second straight line, and the distance from the second straight line to the direction of the force is the force arm of the force. When the striker moves from the conversion position to the top dead center position, the force arm relative to the second straight line gradually shortens.

[0063] In some embodiments, the travel distance of the striker from the bottom dead center position to the top dead center position is greater than or equal to 70 mm and less than or equal to 86 mm.

[0064] In some embodiments, the travel distance of the striker from the transition position to the top dead center position is greater than or equal to 3.7 mm and less than or equal to 4.8 mm.

[0065] In some embodiments, the travel distance of the striker from the rest position to the top dead center position is greater than or equal to 1.6 mm and less than or equal to 2.6 mm.

[0066] In some embodiments, a ratio of a travel distance of the striker from the rest position to the top dead center position to a travel distance of the striker from the transition position to the top dead center position is greater than or equal to 0.5 and less than or equal to 0.9.

[0067] In some embodiments, from the switching position to the parking position, the torque of the driving member is greater than or equal to 2.5 N·m and less than or equal to 8.5 N·m.

[0068] In the eighth aspect, an embodiment of the present application provides a fastener driver, comprising: a firing pin, configured to output striking force; a transmission mechanism, comprising a driving member configured to drive the firing pin to move; the firing pin comprises: a main body, extending along a first straight line direction; a plurality of engaging teeth, arranged on the main body, the plurality of engaging teeth including a first engaging tooth for stopping the firing pin in a stop position; the driving member comprises: a driving tooth, configured to engage with the plurality of engaging teeth to drive the firing pin to move; when the firing pin is in the stop position, the first engaging tooth contacts the driving tooth at a contact point, and generates a force perpendicular to the tangent of the contact point, and the angle between the direction of the force and the first straight line direction is greater than or equal to 0 degrees and less than or equal to 40 degrees.

[0069] In the ninth aspect, an embodiment of the present application provides a fastener driver, comprising: a striking assembly, comprising a piston and a firing pin, the firing pin being connected to the piston; a transmission mechanism, comprising a driving member configured to drive the striking assembly to move backward to the top dead center position; an energy storage device, configured to drive the striking assembly to move forward to the bottom dead center position to output striking force, the energy storage device comprising a vent for inflating and deflating the energy storage device; a control device, configured to control the firing pin to be in a stop position, the stop position being between the top dead center position and the bottom dead center position; the striking assembly is configured to move backward to and remain in a preparation position beyond the stop position to approach the top dead center position, or move backward to and remain in an inflation position that reaches or exceeds the top dead center position before the energy storage device is inflated.

[0070] In some embodiments, the striking assembly is configured to move forward toward a bottom dead center position when the energy storage device is charged.

[0071] In some embodiments, the striking assembly is configured to move forward to a bottom dead center position when the energy storage device is charged.

[0072] In some embodiments, before the energy storage device is inflated, the transmission mechanism drives the striking assembly to move backward to and remain in the inflated position.

[0073] In some embodiments, the striking assembly is configured to move rearwardly to and remain in the inflated position when the energy storage device is deflated through the vent.

[0074] In some embodiments, the energy storage device includes a first cylinder, and at least a portion of the striking assembly is configured to move in the first cylinder.

[0075] In some embodiments, the transmission mechanism includes a motor configured to brake to stop the rearward movement of the striking assembly. When the motor brakes, the motor is configured to rotate a first number of braking revolutions from the start of braking to the end of braking before the energy storage device is charged, and to rotate a second number of braking revolutions from the start of braking to the end of braking after the energy storage device is charged. The difference between the first number of braking revolutions and the second number of braking revolutions is greater than or equal to 6 revolutions and less than or equal to 12 revolutions.

[0076] In some embodiments, the fastener driver includes a detection assembly that detects the position of the striking assembly relative to the inflation position.

[0077] In some embodiments, the fastener driver includes a display device that displays the position of the striking assembly.

[0078] In some embodiments, the transmission mechanism includes a clutch assembly that limits the forward movement of the striking assembly when the striking assembly and the driving member are engaged.

[0079] In the tenth aspect, an embodiment of the present application provides an inflation adapter suitable for a fastener driver, comprising: a first connection end, configured to connect to an air source, the first connection end being provided with an air inlet; a second connection end, configured to be connected to a vent portion of the fastener driver, and configured to move toward the vent portion to an extreme position; an air outlet, connected to the vent portion; a drive assembly, configured to open a valve at the vent portion; the drive assembly having at least a first position in which the valve is opened and a second position in which the valve is not opened; the drive assembly is configured to be in the second position at least when the second connection end is in the extreme position.

[0080] In some embodiments, the inflation adapter further includes an operating portion configured to be operated by a user to drive the drive assembly to move.

[0081] In some embodiments, the driving assembly includes a first driving member and a second driving member, the operating portion is configured to drive the first driving member, and the first driving member is configured to drive the second driving member.

[0082] In some embodiments, the first connecting end is rotatable relative to the second connecting end.

[0083] In some embodiments, the inflation adapter further comprises a filter configured to filter air, the filter being connected to the air inlet so that filtered air enters the air inlet.

[0084] In some embodiments, the second connecting end includes an engaging portion configured to engage with the vent portion so that the second connecting end can at least stay in the limit position.

[0085] In some embodiments, the vent portion and the engaging portion are formed with threads.

[0086] In some embodiments, the inflation adapter further includes a first inflation chamber for accommodating the first elastic member and a second inflation chamber for accommodating the second elastic member.

[0087] In some embodiments, the inflation adapter further includes a first seal configured to seal the first inflation cavity relative to the second inflation cavity.

[0088] In some embodiments, the inflation adapter further comprises a second sealing member configured to seal the second connecting end from the vent.

[0089] In some embodiments, the drive assembly is configured to move to the first position at least after the second connection end reaches the limit position.

[0090] An inflation adapter for inflating a device to be inflated, the device to be inflated comprising an air storage space and a vent portion connected to the air storage space, the inflation adapter comprising: a first connection end, configured to be connected to an air source, the first connection end being provided with an air inlet; a second connection end, configured to be connected to the vent portion of the device to be inflated, and configured to move toward the vent portion to an extreme position, defining an airflow path from the air inlet to the air storage space as an inflation channel; a drive assembly, comprising at least a first position which opens the inflation channel to allow airflow and a second position which closes the inflation channel to prevent airflow; the drive assembly being configured to be in the second position at least when the second connection end is in the extreme position.

[0091] In some embodiments, the inflation adapter further includes an operating portion configured to be operated by a user to drive the drive assembly to move.

[0092] In some embodiments, the drive assembly is configured to move to the first position at least after the second connection end reaches the limit position. BRIEF DESCRIPTION OF THE DRAWINGS

[0093] FIG1 is a perspective view of a fastener driver according to one embodiment of the present application;

[0094] FIG2 is a left side view of the fastener driver of FIG1 ;

[0095] FIG3 is a front view of the fastener driver of FIG1 ;

[0096] FIG4 is a cross-sectional view of the fastener driver in FIG3 taken along plane x1;

[0097] FIG5 is a front view of the transmission mechanism and housing of the fastener driver of FIG1 ;

[0098] FIG6 is a cross-sectional view of the transmission mechanism and the housing along plane x2 in FIG5 ;

[0099] FIG7 is a cross-sectional view of the transmission mechanism and the housing along plane x3 in FIG5 ;

[0100] FIG8 is a top view of the striking assembly and driving member of the fastener driver of FIG1;

[0101] FIG9 is a front view of the striking assembly and driving member of the fastener driver of FIG1 ;

[0102] 10 is a cross-sectional view of the striking assembly and the driving member of the fastener driver in FIG. 9 taken along plane x4 at the bottom dead center position;

[0103] 11 is a cross-sectional view of the striking assembly and the driving member of the fastener driver of FIG. 9 taken along plane x4 at the top dead center position;

[0104] 12 is a schematic diagram of the first engaging tooth and the first driving tooth of the fastener driver of FIG. 1 at the top dead center position, the parking position, the switching position and the bottom dead center position;

[0105] FIG13 is a schematic diagram showing the relationship between the travel distance of the striker of the fastener driver of FIG1 from the bottom dead center position to the top dead center position and the driving member torque, angle a, lever arm and force F;

[0106] FIG14 is a perspective view of the transmission mechanism, moving member, detection mechanism and guide assembly of the fastener driver in FIG1 ;

[0107] FIG15 is a top view of the transmission mechanism, moving member, detection mechanism and guide assembly of the fastener driver in FIG1 ;

[0108] FIG16 is a top view of the striking assembly and the driving member of the fastener driver of FIG1 at the top dead center position;

[0109] FIG17 is a side view of the transmission mechanism, moving member, detection mechanism and guide assembly of the fastener driver of FIG1;

[0110] FIG18 is a schematic diagram of the moving member, the detection mechanism and the driving member of the fastener driver of FIG1 within a first preset position range;

[0111] FIG19 is a perspective view of a support frame and an energy storage device of the fastener driver of FIG1 ;

[0112] FIG20 is a perspective view of the support frame, energy storage device and second guide member of the fastener driver of FIG1 ;

[0113] 21 is a bottom view of the support frame, energy storage device and second guide member of the fastener driver of FIG. 1 ;

[0114] FIG22 is a perspective view of a support frame of one embodiment of the fastener driver of FIG1 ;

[0115] FIG23 is a perspective view of a support frame, an energy storage device, and a guide assembly of one embodiment of the fastener driver of FIG1 ;

[0116] FIG24 is a bottom view of a support frame, an energy storage device, and a guide assembly of one embodiment of the fastener driver of FIG1 ;

[0117] FIG25 is a cross-sectional view of the energy storage device of the fastener driver of FIG1 at the top dead center position and the bottom dead center position;

[0118] FIG26 is a top view of the striker assembly of the fastener driver of FIG1 ;

[0119] FIG27 is a top view of the energy storage device and striking assembly of the fastener driver of FIG1 ;

[0120] FIG28 is a cross-sectional view of the energy storage device of the fastener driver of FIG1 taken along plane x5;

[0121] FIG29 is a perspective view of the magazine and runaway protection assembly of the fastener driver of FIG1;

[0122] FIG30 is a side view of the magazine and runaway protection assembly of the fastener driver of FIG1 ;

[0123] FIG31 is a cross-sectional view of the anti-runaway assembly and portion of the magazine of the fastener driver of FIG1 ;

[0124] FIG32 is a front elevational view of a portion of the runaway prevention assembly of the fastener driver of FIG1;

[0125] FIG33 is an exploded view of the magazine and anti-runaway assembly of the fastener driver of FIG1 at an angle;

[0126] FIG34 is an exploded view of the magazine and anti-runaway assembly of the fastener driver of FIG1 at another angle;

[0127] FIG35 is a top view of the fastener driver of FIG1;

[0128] FIG36 is a partial enlarged view of the vent portion of the fastener driver of FIG1;

[0129] FIG37 is a schematic diagram of the striking assembly of the fastener driver of FIG1 in the inflated position, the ready position, the parked position, and the bottom dead center position;

[0130] FIG38 is a flow chart of the energy storage device of the fastener driver of FIG1 during charging;

[0131] FIG39 is a perspective view of an inflatable adapter and filter suitable for use with the fastener driver of FIG1;

[0132] FIG40 is a cross-sectional view along one plane of an inflatable adapter and a filter to which the fastener driver of FIG1 is applicable;

[0133] FIG41 is an exploded view of an inflatable adapter and filter suitable for use with the fastener driver of FIG1 ;

[0134] FIG42 is a side view of the valve of the fastener driver of FIG1;

[0135] FIG43 is a cross-sectional view of the valve of the fastener driver of FIG1;

[0136] 44 is a cross-sectional view of the fastener driver of FIG. 1 along another plane of the inflation adapter;

[0137] FIG45 is a plan view of an inflatable adapter and a gauge suitable for use with the fastener driver of FIG1;

[0138] FIG46 is a perspective view of the housing and magazine of the fastener driver of FIG1;

[0139] FIG47 is a left side elevational view of the housing and magazine of the fastener driver of FIG1;

[0140] FIG48 is a cross-sectional view of the housing and magazine of the fastener driver of FIG1 taken along plane x6;

[0141] FIG49 is an enlarged fragmentary view of the housing and magazine of the fastener driver of FIG48;

[0142] FIG50 is a rear view of a fastener driver according to one embodiment of the present application;

[0143] FIG51 is a left side view of the fastener driver of FIG50;

[0144] FIG52 is a cross-sectional view of the fastener driver of FIG51 taken along plane x7;

[0145] FIG53 is a cross-sectional view of the fastener driver of FIG51 taken along plane x8;

[0146] FIG54 is a rear elevational view of the energy storage device, gearbox, motor, trigger, and coupling of the fastener driver of FIG50;

[0147] FIG55 is a partial enlarged view of the first housing and the second housing of the fastener driver of FIG50;

[0148] FIG56 is a left side view of a fastener driver according to one embodiment of the present application;

[0149] FIG57 is an exploded view of the magazine of the fastener driver of FIG56 at an angle;

[0150] FIG58 is an exploded view of the magazine of the fastener driver of FIG56 at another angle;

[0151] FIG59 is a perspective view of a fastener driver according to one embodiment of the present application;

[0152] FIG60 is an exploded view of the guide assembly, firing pin, and fastener of the fastener driver of FIG59 at an angle;

[0153] FIG61 is an enlarged fragmentary view of the first guide member of the fastener driver of FIG59;

[0154] 62 is a perspective view of the first guide, striker and fastener of the fastener driver of FIG. 59 ;

[0155] FIG63 is a schematic diagram of the guide assembly, firing pin, and fastener of the fastener driver of FIG59;

[0156] FIG64 is an exploded view of the guide assembly, firing pin and fastener of the fastener driver of FIG59 from another angle;

[0157] FIG65 is a left side view of the guide assembly, fastener and lift member of the fastener driver of FIG59;

[0158] FIG66 is an enlarged fragmentary view of the guide assembly and fastener of the fastener driver of FIG65;

[0159] FIG67 is a schematic diagram of a partial structure of the interior of a fastener driver according to one embodiment of the present application;

[0160] FIG68 is a schematic structural diagram of some components of the fastener driver of FIG67 , wherein the striking member is in a striking position;

[0161] FIG69 is a schematic structural diagram of FIG68 from another perspective;

[0162] FIG70 is a half-sectional view of FIG68 , wherein the striking member is in a striking position;

[0163] FIG71 is a half-sectional view of FIG68 , wherein the striking member is in a parked position;

[0164] FIG72 is a schematic diagram of the outer envelope of the rotation trajectory of the striking member and the first pin;

[0165] Figure 73 is a partially enlarged view of part J in Figure 72. DETAILED DESCRIPTION

[0166] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0167] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0168] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0169] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0170] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0171] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0172] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0173] In this application, the terms "controller," "processor," "central processing unit," "CPU," and "MCU" are used interchangeably. Where a unit "controller," "processor," "central processing unit," "CPU," or "MCU" is used to perform a particular function, unless otherwise specified, the function may be performed by a single unit or multiple units.

[0174] In this application, the terms "device", "module" or "unit" can be implemented in the form of hardware or software to achieve specific functions.

[0175] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0176] The technical solution of the present application will be further explained below with reference to the accompanying drawings and through specific implementation methods.

[0177] As shown in Figures 1 and 2, this embodiment provides a fastener driver 100. The fastener driver 100 provided in this embodiment is a pre-inflated dual-cylinder fastener driver. For example, the fastener driver may also be a single-cylinder fastener driver, a dual-cylinder fastener driver, a pre-inflated fastener driver, a non-pre-inflated fastener driver, a spring-loaded fastener driver, etc., without limitation herein. The fastener driver 100 is capable of generating an impact force on a fastener 10, thereby driving the fastener 10 into a workpiece.

[0178] The fastener driver 100 includes a housing 110 and a magazine 120. The housing 110 includes a main housing 111, a transmission portion 112, and a grip portion 113 for the user to hold. The magazine 120 is configured to accommodate the fastener 10, and at least a portion of the magazine 120 is disposed outside the housing 110. The fastener 10 provided in this embodiment is a nail. The size of the nail can be 15Ga, 16Ga, 18Ga, 23Ga, 25Ga, etc., which are not limited here. The use angle of the nail can be 0 degrees, 5 degrees, 10 degrees, 15 degrees, 20 degrees, 25 degrees, 30 degrees, etc., which are not limited here. The nail can be a straight nail, a U-shaped nail, etc., which are not limited here.

[0179] One end of the grip 113 is connected to the main housing 111. A trigger 1131 is provided on the grip 113 and is connected to a main switch. The user activates the main switch by triggering 1131 to start and stop the fastener driver 100. The fastener driver 100 includes a coupling 114. The other end of the grip 113 is connected to the coupling 114, which is configured to receive a DC or AC power source. In this embodiment, the coupling 114 removably mounts a battery pack 115, the specifications and power of which are not limited herein.

[0180] As shown in Figures 3 and 4, the fastener driver 100 further includes a striking assembly 130, a transmission mechanism 140, an energy storage device 150, and a motor 160. The striking assembly 130 includes a striker 131. The striker 131 delivers striking force to the fastener 10, driving the fastener 10 into the workpiece. The energy storage device 150 drives the striker 131 forward to deliver the striking force. The transmission mechanism 140 drives the striker 131 backward to store energy in the energy storage device 150. A storage space is formed inside the main housing 111 to accommodate at least a portion of the energy storage device 150 and the striking assembly 130. The main housing 111 supports at least a portion of the energy storage device 150. The motor 160 drives at least the transmission mechanism. The battery pack 115 provides energy for the motor 160. A storage space is formed inside the transmission unit 112. At least a portion of the motor 160 and the transmission mechanism 140 are housed within the transmission unit 112. The transmission portion 112 supports at least a portion of the motor 160 and the transmission mechanism 140 .

[0181] As shown in Figures 3 to 7, in this embodiment, the motor 160 is an electric motor. The motor 160 includes a motor output shaft 161. The transmission mechanism 140 includes a gear set 141 and a driving member 142. The motor output shaft 161 drives the gear set 141 to rotate. The gear set 141 includes a gear set output shaft 1411. The gear set output shaft 1411 drives the driving member 142 to move. The driving member 142 drives the striker 131 to move. The gear set 141 includes a multi-stage planetary gear, and the multi-stage planetary gear includes at least two stages of planetary gears. Each stage of the planetary gears uses the same number of teeth, module, size, and transmission ratio to reduce manufacturing costs.

[0182] Transmission unit 112 is secured by screws 112a. Within transmission unit 112, the vertical spacing between gear set 141 and motor 160 is relatively large, allowing screws 112a to retract radially inward along the transmission unit 112. Part of screw 112a is located between gear set 141 and motor 160, fully utilizing the space between them. This reduces the radial dimension of transmission unit 112 and prevents the outer surface from protruding due to the installation of screws 112a, resulting in an aesthetically pleasing, simple, and cost-effective design.

[0183] The fastener driver 100 includes an air inlet 1121. There can be multiple air inlets 1121. In this embodiment, the air inlet 1121 is arranged between the transmission part 112 and the coupling part 114. The air inlet 1121 is arranged between the motor 160 and the PCB board, making full use of the space of the shell 110 and improving the heat dissipation efficiency of the motor 10. The air inlet 1121 is a hole, and the hole is strip-shaped. The shell 110 is formed with a dust-proof structure at the air inlet 1121 that bends into the shell 110 to prevent dust from entering the fastener driver 100. In some embodiments, the air inlet 1121 can also be set to be an air outlet.

[0184] The fastener driver 100 includes a trigger lever 121. The trigger lever 121 is connected to a safety switch. When the trigger lever 121 is triggered, the safety switch is released. With the safety switch released, when the user presses the trigger 1131, the firing pin 131 fires a fastener 10. After firing, the firing pin 131 remains in a rest position, awaiting the next press of the trigger 1131 to fire the next fastener 10. In some embodiments, when the trigger 1131 is pressed, the firing pin 131 fires a fastener 10 each time the safety switch is released. After the firing pin 131 fires a fastener 10, the fasteners 10 in the magazine 120 are replenished at the front end of the firing pin 131, awaiting ejection by the firing pin 131. Driven by the transmission mechanism 140 and the energy storage device 150, the firing assembly 130 reciprocates to continuously fire the fasteners 10 one by one. During each firing cycle, the fastener driver 100 ejects a fastener 10.

[0185] The striking assembly 130 also includes a piston 122. A striker 131 is mounted on the piston 122, and the piston 122 is substantially located behind the striker 131. The energy storage device 150 includes a first cylinder 151. The first cylinder 151 accommodates at least a portion of the piston 122 and allows the piston 122 and a portion of the striker 131 to reciprocate within the first cylinder 151. When the transmission mechanism 140 drives the striking assembly 130 to move backward, the air within the first cylinder 151 is compressed, and the energy storage device 150 stores energy. When the energy storage device 150 drives the striking assembly 130 to move forward, the elastic potential energy of the compressed air is converted into kinetic potential energy, and the striking assembly 130 outputs a striking force.

[0186] The main housing 111 includes a heat dissipation area 1111, which is a hollowed-out area on the main housing 111. The outer surface of the first cylinder 151 exchanges heat with the air through the heat dissipation area 1111, thereby improving heat dissipation efficiency. There can be multiple heat dissipation areas 1111. The heat dissipation area 1111 is located in the rear half of the main housing 111. In this embodiment, at least 80% of the area of ​​the heat dissipation area 1111 allows the outer surface of the rear half of the first cylinder 151 to be in contact with the air, dissipating heat from the portion of the first cylinder 151 that generates more significant heat. There are two heat dissipation areas 1111, located on the left and right sides of the main housing 111, and having substantially the same shape and position.

[0187] As shown in Figures 8 to 12, the striker 131 includes a main body 132 and a plurality of meshing teeth 133. The plurality of meshing teeth 133 are provided on the main body 132. The main body 132 is configured to extend along the direction of the first straight line 101. The striker 131 moves along the first straight line 101 to output a striking force to the fastener 10. It should be noted that the first straight line 101 is a virtual line, and the direction of the first straight line 101 is the front-to-back direction indicated by the first straight line 101. The direction of the first straight line 101 is the direction in which the fastener 10 is shot into the workpiece.

[0188] A plurality of meshing teeth 133 are arranged on the striker 131 at substantially equal intervals along the length direction of the striker 131. The plurality of meshing teeth 133 protrude from the main body 132 and are wavy in shape as a whole. The plurality of meshing teeth 133 include a first meshing tooth 134. The first meshing tooth 134 stops the striker 131 in the parking position. The striker 131 includes a tip 1311 and an end 1312 along the length direction. The end 1312 is mounted to the piston 122, and the tip 1311 contacts the fastener 10 when the striker 131 strikes the fastener 10. The first meshing tooth 134 is the tip 1311 closest to the striker 131 among the plurality of meshing teeth 133. In some embodiments, at least one of the plurality of meshing teeth 133 is shark fin-shaped. The first meshing tooth 134 is thicker than the remaining plurality of meshing teeth 133. The first meshing tooth 134 may also be coated or plated.

[0189] The driving member 142 includes a driving tooth 143. There are a plurality of driving teeth 143, and the plurality of driving teeth 143 engage with the plurality of meshing teeth 133 to drive the striker 131 to move backward. The driving member 142 includes a first fixed layer 144 and a second fixed layer 145 that are arranged substantially in parallel. The plurality of driving teeth 143 are arranged substantially equidistantly between the first fixed layer 144 and the second fixed layer 145 along the circumferential direction. The first fixed layer 144 and the second fixed layer 145 are plates with a certain thickness. The plurality of driving teeth 143 are cylindrical, and the two ends of the cylinder are respectively fixed to the first fixed layer 144 and the second fixed layer 145. In some embodiments, the driving teeth 143 are movable or rotatable to reduce the friction between the driving teeth 143 and the meshing teeth 133. In some embodiments, a movable or rotatable pin sleeve is provided on the driving teeth 143.

[0190] As shown in Figure 12 , the driving member 142 rotates about the second straight line 102, which is defined as a rotation point C when viewed from above. The different locations of the rotation point C are denoted by C1, C2, and C3 in the accompanying drawings. The driving member 142 is a drive wheel that rotates about the second straight line 102, or, more specifically, about the rotation point C when viewed from above. In some embodiments, when viewing the driving member 142 from above, the outer contours of the plurality of driving teeth 143 are tangent to the circumference of a common circle.

[0191] When the driving member 142 drives the striker 131 to move backward, the circumferential outer contours 135 of the plurality of meshing teeth 133 contact the circumferential outer contours 135 of the plurality of driving teeth 143. In this embodiment, there are seven driving teeth 143 and seven meshing teeth 133. The seven driving teeth 143 mesh with the seven meshing teeth 133 in sequence in a one-to-one correspondence. In some embodiments, the driving teeth 143 and the meshing teeth 133 may also have other numbers. Since the front and rear positions of the driving member 142 remain unchanged and it only rotates in place around the rotation point C, when the driving member 142 rotates, the striker 131 is able to move backward under the drive of the driving member 142. The driving member 142 includes a notch 146, which is an arc-shaped notch that is basically concave toward the rotation point C.

[0192] As shown in Figures 9 and 10, the driving member 142 and the striker 131 are viewed from directly above the fastener driver 100. When the notch 146 is rotated to open substantially upward, the first driving tooth 143 on the left side of the notch 146 is designated as the first driving tooth 147, and the first driving tooth 143 on the right side of the notch 146 is designated as the seventh driving tooth 148. The plurality of meshing teeth 133 also includes a seventh meshing tooth 136. The first driving tooth 147 meshes with the first meshing tooth 134 during rotation, and the seventh driving tooth 148 meshes with the seventh meshing tooth 136 during rotation. Each driving tooth 143 meshes with its corresponding meshing tooth 133 once for each rotation of the driving member 142.

[0193] The firing pin 131 can move to multiple positions. As shown in FIG4 , the fastener driver 100 includes a buffer 123. When the firing pin 131 is at the bottom dead center position, the piston 122 contacts the buffer 123, the striking assembly 130 stops moving forward, and the firing pin 131 moves substantially to the forwardmost position it can move to. The fastener 10 is ejected by the firing pin 131. The seventh drive tooth 148 engages with the seventh engagement tooth 136, and the motor 160 drives the transmission mechanism 140 to drive the driving member 142 to rotate counterclockwise. As shown in FIG6 , the transmission mechanism 140 includes a clutch assembly 149, which prevents the driving member 142 from rotating clockwise.

[0194] As shown in Figures 8 to 12, during the counterclockwise rotation of the driving member 142, the multiple drive teeth 143 sequentially engage with the multiple meshing teeth 133. Driven by the driving member 142, the striking assembly 130 overcomes atmospheric pressure and moves backward from the bottom dead center position, causing the first drive tooth 147 to mesh with the first meshing tooth 134. The first meshing tooth 134 and the first drive tooth 147 contact at contact point B, generating a force F perpendicular to the tangent of contact point B. The different positions of contact point B are denoted by B1, B2, and B3 in the drawings. The different positions of the force F are denoted by F1, F2, and F3 in the drawings. After the driving teeth 143 begin to mesh with the first meshing teeth 134, the angle a between the direction of the force F and the first linear direction gradually decreases or remains constant. The striker 131 gradually moves to the transition position. The angle a between the direction of the force F and the first linear direction is substantially zero. As the striker 131 continues to move backward from the switching position, the angle a between the direction of the force F and the direction of the first straight line gradually increases. The angle a at different positions is indicated by a1 (not shown), a2, and a3 in the drawings.

[0195] The firing pin 131 continues to move backward, the energy storage device 150 continues to store energy, and the firing pin 131 reaches the stop position. At the stop position, the fastener driver 100 stops. When the user presses the trigger 1131, the driving member 142 continues to drive the firing pin 131 to move backward to the top dead center position. The air in the first cylinder 151 is basically compressed to the limit, and the elastic potential energy stored in the energy storage device 150 basically reaches the peak value. The striking assembly 130 stops moving backward, and the firing pin 131 basically moves to the rearmost position it can move to. When the firing pin 131 just passes the top dead center position, the driving tooth 143 disengages from the meshing tooth 133. At this time, the driving member 142 rotates to a position where the notch 146 opens upward, the firing pin 131 is not engaged with the driving member 142, and the firing pin 131 can move forward. Driven by the energy storage device 150, the elastic potential energy is converted into kinetic potential energy, and the compressed air causes the striker 131 to move forward, the striker 131 outputs striking force, and the fastener 10 is struck out by the striker 131. The striker 131 moves to the bottom dead center position again.

[0196] From a distance perspective, one firing cycle is when the firing pin 131 returns from the top dead center position to the top dead center position, or from the bottom dead center position to the bottom dead center position. From a user's perspective, one firing cycle is when the firing pin 131 returns to the rest position. In this embodiment, one firing cycle is when the firing pin 131 returns to the rest position.

[0197] As shown in FIG12 , the ratio of the travel distance L1 of the striker 131 from the rest position to the top dead center position to the travel distance L2 of the striker 131 from the transition position to the top dead center position is less than or equal to 1. In some embodiments, the ratio of the travel distance L1 of the striker 131 from the rest position to the top dead center position to the travel distance L2 of the striker 131 from the transition position to the top dead center position is greater than or equal to 0.4 and less than or equal to 0.9. In some embodiments, the ratio of the travel distance L1 of the striker 131 from the rest position to the top dead center position to the travel distance L2 of the striker 131 from the transition position to the top dead center position is greater than or equal to 0.5 and less than or equal to 0.9. In some embodiments, the ratio of the travel distance L1 of the striker 131 from the rest position to the top dead center position to the travel distance L2 of the striker 131 from the transition position to the top dead center position is greater than or equal to 0.6 and less than or equal to 0.8. In some embodiments, the ratio of the travel distance L1 of the striker 131 from the parking position to the top dead center position to the travel distance L2 of the striker 131 from the conversion position to the top dead center position is equal to 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, or 0.85.

[0198] When the firing pin 131 is in the parked position, the angle a between the direction of the force F and the direction of the first straight line 101 is greater than or equal to 0 degrees and less than or equal to 40 degrees. In some embodiments, the angle a between the direction of the force F and the direction of the first straight line 101 is greater than or equal to 0 degrees and less than or equal to 12 degrees. In some embodiments, the angle a between the direction of the force F and the direction of the first straight line 101 is greater than or equal to 2 degrees and less than or equal to 10 degrees. In some embodiments, the angle a between the direction of the force F and the direction of the first straight line 101 is greater than or equal to 3 degrees and less than or equal to 8 degrees. In some embodiments, the angle a between the direction of the force F and the direction of the first straight line 101 is equal to 39 degrees, 38 degrees, 37 degrees, 35 degrees, 30 degrees, 25 degrees, 20 degrees, 15 degrees, 13 degrees, 12.5 degrees, 12.4 degrees, or 12.3 degrees.

[0199] The ratio of the travel distance L1 of the striker 131 from the stop position to the top dead center position to the travel distance L2 of the striker 131 from the conversion position to the top dead center position is greater than or equal to 0.5 and less than or equal to 1. When the striker 131 is in the stop position, the angle a between the direction of the force F and the direction of the first straight line 101 is greater than or equal to 0 degrees and less than or equal to 12 degrees. In this way, the stop position is close to the top dead center position, so that when the fastener driver 100 is started, the starting load of the motor 160 is small, energy consumption is saved, the working efficiency is high, and the degree of heat generation of the motor 160 is low. The stop position is not too close to the top dead center position, which is safe and prevents the fastener driver 100 from accidentally ejecting the fastener 10. The stop position is adjusted by the travel distance of the striker 131, the establishment of a suitable stop position can be quantified, and the stop position accuracy is high.

[0200] The striker 131 has a travel distance from the bottom dead center position to the top dead center position of greater than or equal to 70 mm and less than or equal to 86 mm. In some embodiments, the striker 131 has a travel distance from the bottom dead center position to the top dead center position of greater than or equal to 75 mm and less than or equal to 81 mm. In some embodiments, the striker 131 has a travel distance from the bottom dead center position to the top dead center position of greater than or equal to 77 mm and less than or equal to 79 mm. In some embodiments, the striker 131 has a travel distance from the bottom dead center position to the top dead center position of equal to 78 mm.

[0201] The stroke distance L1 of the striker 131 from the stop position to the top dead center position is greater than or equal to 1.6 mm and less than or equal to 2.6 mm. In some embodiments, the stroke distance L1 of the striker 131 from the stop position to the top dead center position is greater than or equal to 1.8 mm and less than or equal to 2.4 mm. The stroke distance L2 of the striker 131 from the transition position to the top dead center position is greater than or equal to 3.6 mm and less than or equal to 4.4 mm. In some embodiments, the stroke distance L2 of the striker 131 from the transition position to the top dead center position is greater than or equal to 3.8 mm and less than or equal to 4.2 mm. In some embodiments, the stroke distance L2 of the striker 131 from the transition position to the top dead center position is equal to 4 mm. The stroke distance L1 of the striker from the stop position to the top dead center position is less than the stroke distance L2 of the striker 131 from the transition position to the top dead center position, the stop position is between the transition position and the top dead center position, and the stop position is close to the top dead center position.

[0202] Continuing with reference to FIG12 , the outer contour 135 of the first engaging tooth 134 has a straight portion 1351 and an arcuate portion 1352. In the conversion position, the first drive tooth 147 transitions from being engaged with the straight portion 1351 to being engaged with the arcuate portion 1352. The angle b between the straight portion 1351 and the first straight direction is greater than or equal to 87 degrees and less than or equal to 105 degrees. In some embodiments, the angle b between the straight portion 1351 and the first straight direction is greater than or equal to 89 degrees and less than or equal to 99 degrees. In some embodiments, the angle b between the straight portion 1351 and the first straight direction is greater than or equal to 90 degrees and less than or equal to 97 degrees. In some embodiments, the angle b between the straight portion 1351 and the first straight direction is approximately equal to 90 degrees. The straight portion 1351 is connected to the main body 132 of the striker 131 by a section of an arcuate connecting line that is recessed toward the main body 132. Due to the presence of the arcuate connecting line and the straight portion 1351, the first drive tooth 147 first contacts the arcuate connecting line and then contacts the straight portion 1351. After the angle a between the direction of the force F and the first straight direction gradually decreases, it remains unchanged in the straight portion 1351. In the straight portion 1351, the angle a between the direction of the force F and the first straight direction is 0 degrees. In some embodiments, the straight portion 1351 is directly connected to the main body 132 of the striker 131, and the first drive tooth 147 directly contacts the straight portion 1351. The angle a between the direction of the force F and the first straight direction remains unchanged at 0 degrees before the striker 131 passes the transition position. The arcuate portion 1352 connected to the straight portion 1351 protrudes in a direction away from the main body 132 of the striker 131. When the striker 131 passes the transition position, the first drive tooth 147 moves along the arcuate portion 1352, and the angle a between the direction of the force F and the first straight direction gradually increases. The arcuate portion 1352 has a center A. The center of the circle A at different positions is indicated by A1, A2, and A3 in the accompanying drawings. The first drive tooth has a center point H. At the top dead center position, the center of the circle A, the contact point B, the center point H of the first drive tooth, and the rotation point C can be connected into a straight line. The outer contour 135 of the first meshing tooth 134 has a straight portion 1351 and an arc portion 1352. In this way, the first drive tooth 147 can first apply a force to the first meshing tooth 134 through the straight portion 1351 to drive the striker 131 to move backward, and the force loss is small. The first drive tooth 147 then passes through the arc portion 1352, using a gentler arc to accurately stop the striker 131 at a stop position close to the top dead center position, with high control accuracy.

[0203] When the striker 131 moves backward, the pressure exerted on the striker 131 by the compressed air in the first cylinder 151 gradually increases. The pressure acts on the drive tooth 143, which is equivalent to applying a torque to the drive member 142. This torque is the force F generated at the contact point B and perpendicular to the tangent of the contact point B. The distance from the second straight line 102 to the direction of the force F is the lever arm FD of the force F. The lever arm FD is labeled FD1, FD2, FD3 (not shown), etc. at different positions in the accompanying drawings. In other words, when viewed from above, the perpendicular line from the force F to the rotation point C is the lever arm FD. When the striker 131 moves from the conversion position to the top dead center position, the distance from the force F to the rotation point C gradually shortens, the lever arm FD gradually shortens, and the load on the motor 160 gradually decreases.

[0204] The torque of motor 160 can be regarded as the load of motor 160. When the transmission ratio of gear set 141 is fixed, the torque of driving member 142 is positively correlated with the torque of motor 160. From the conversion position to the stop position, the torque of driving member 142 is greater than or equal to 2.5N·m and less than or equal to 8.5N·m. In some embodiments, from the conversion position to the stop position, the torque of driving member 142 is greater than or equal to 3N·m and less than or equal to 8N·m. In some embodiments, from the conversion position to the stop position, the torque of driving member 142 is greater than or equal to 4N·m and less than or equal to 7N·m. In the stop position, the torque of driving member 142 is small, and the torque of motor 160 to start again is small, saving energy. The fastener driver 100 can work for a long time, has high working efficiency, and the temperature rise of motor 160 is low.

[0205] As shown in Figure 13, as the striker moves from the bottom dead center position to the top dead center position, the force F gradually increases as the piston 122 moves backward in the first cylinder 151 and compresses air. In this embodiment, the force F increases linearly. The torque of the driving member 142 is the product of the force F and the lever arm FD. The changing trend of the torque of the motor 160 is consistent with the changing trend of the torque of the driving member 142. After the striker 131 passes the switching position, although the force F continues to increase, the lever arm FD decreases rapidly. Therefore, the torque of the driving member 142 decreases, and the torque of the motor 160 decreases. The ratio of the travel distance L1 of the striker 131 from the parking position to the top dead center position to the travel distance L2 of the striker 131 from the switching position to the top dead center position is less than or equal to 1. The parking position of the striker 131 is close to the top dead center position, and the starting load of the motor 160 is low. When the striker 131 is in the stop position, the angle a between the direction of the applied force F and the direction of the first straight line 101 is greater than or equal to 0 degrees and less than or equal to 40 degrees. The stop position of the striker 131 is close to the top dead center position, and the starting load of the motor is low. It should be noted that the stop position marked in Figure 13 is not the only possible stop position. As long as the starting load of the motor 160 is low in the stop position, the specific stop position is not limited here.

[0206] As shown in Figures 6 and 14 to 17, the fastener driver 100 includes a control device. The control device includes a controller 172. The controller 172 is connected to the motor 160 and the detection mechanism 170. The controller 172 is connected to the motor 160 and the detection mechanism 170, respectively, so that signals can be sent and received between the controller 172, the motor 160, and the detection mechanism 170. The detection mechanism 170 is configured to detect the position of a moving member 171. After the moving member 171 reaches a first preset position range and remains within the first preset position range, the detection mechanism 170 can continuously emit a detection signal until the moving member 171 is outside the first preset position range. The detection mechanism 170 emits a detection signal to allow the controller to issue a control signal. In this embodiment, the detection mechanism 170 includes a Hall effect sensor. The moving member 171 is a magnetic element 1711, specifically a cylindrical magnet. In some embodiments, the detection mechanism 170 can also be a potentiometer or other mechanism capable of detecting the position of the moving member 171, or the moving member 171 can be another component that can be detected by the detection mechanism 170.

[0207] As shown in Figure 18, the striker 131 can move to a stop position. When the striker 131 is in the stop position, the movable member 171 also moves to a corresponding position. The position to which the movable member 171 moves when the striker 131 is in the stop position is also collectively referred to as the stop position. Before reaching the stop position, the movable member 171 first reaches a second preset position. In other words, the second preset position is between the bottom dead center and the stop position. When the movable member 171 reaches the second preset position, the controller 172 issues a control signal. Alternatively, the striker 131 moves backward from the bottom dead center. At a first preset time before the movable member 171 reaches the stop position, the controller 172 issues a control signal. After the movable member 171 reaches the first preset position range, the detection mechanism 170 can sense the movable member 171. The detection mechanism 170 is capable of issuing a detection signal, allowing the controller 172 to issue a control signal. When the movable member 171 reaches the second preset position or the first preset time before reaching the stop position, the controller 172 issues a control signal to control the motor. The first preset position range has a first boundary position and a second boundary position, and the first boundary position is on the side of the second boundary position close to the bottom dead center position. The first boundary position and the second boundary position define the first preset position range. The first boundary position can be considered as an extreme detection position of the detection mechanism 170. The second preset position can coincide with the first boundary position of the first preset position, or it can be within the first preset position range. At the first preset time before the moving part 171 reaches the stop position, the controller 172 sends a control signal. The position at which the moving part 171 is located at the first preset time before reaching the stop position can coincide with the first boundary position of the first preset position range, or it can be within the first preset position range.

[0208] When moving member 171 reaches the first preset position range, detection mechanism 170 is capable of detecting moving member 171 and transmitting a detection signal. If the position of detection mechanism 170 remains unchanged, the farther the first boundary position is from detection mechanism 170, the larger the first preset position range, the stronger the detection capability of detection mechanism 170, or the stronger the ability of moving member 171 to be detected by detection mechanism 170. When moving member 171 reaches the second preset position, controller 172 transmits a control signal to control motor 160 to brake after a preset number of rotations, or to brake after a second preset time.

[0209] The detection mechanism 170 is capable of detecting the moving member 171 after it reaches a first preset position range. The detection mechanism 170 is capable of continuously detecting the moving member 171 within the first preset position range. When the moving member 171 reaches the first preset position range, the detection mechanism 170 begins to detect the moving member 171 and begins allowing the controller 172 to issue a control signal. At the second preset position, the controller 172 issues a control signal to control the motor 160. Because the second preset position is before the stop position, if the detection mechanism 170 allows the controller 172 to issue a signal, the controller 172 can control the motor 160 to delay braking after certain preset conditions are met, ultimately stopping the striker 131 at the stop position. This allows ample time for the controller 172 to brake the motor 160. The controller 172 can brake the motor 160 within a relatively long position or time range before stopping. Once the preset conditions are met, the controller 172 ultimately and precisely brakes the motor 160, ensuring that the stop position of the motor 160 is accurate and controllable.

[0210] As shown in Figures 15 and 18, the moving part 171 has a center point E. The angle formed by the center point E of the moving part 171 with the rotation point C of the driving part 142 as the vertex when the center point E of the moving part 171 is respectively at the stop position and the first boundary position is defined as angle g. In Figure 18, E1 and E2 represent the center point E at the first boundary position and the center point E at the stop position, respectively. Angle g is greater than or equal to 10 degrees and less than or equal to 60 degrees. In some embodiments, angle g is greater than or equal to 15 degrees and less than or equal to 50 degrees. In some embodiments, angle g is greater than or equal to 20 degrees and less than or equal to 40 degrees. In some embodiments, angle g is greater than or equal to 30 degrees and less than or equal to 35 degrees.

[0211] When the first preset time passes before the moving part 171 reaches the stop position, the controller 172 sends a control signal. Counting back the first preset time from the time when the moving part 171 reaches the stop position, the moving part 171 is within the first preset position range, or has just reached the first boundary position. In some embodiments, the first preset time is greater than or equal to 20ms and less than or equal to 30ms. In some embodiments, the first preset time is greater than or equal to 22ms and less than or equal to 28ms. In some embodiments, the first preset time is greater than or equal to 24ms and less than or equal to 26ms. In some embodiments, the first preset time is greater than or equal to 10ms and less than or equal to 50ms. In some embodiments, the first preset time is greater than or equal to 15ms and less than or equal to 40ms.

[0212] During use, the fastener driver 100 frequently stops. The first drive teeth 147 and the first meshing teeth 134 wear out after repeated stops. When the angle g is greater than or equal to 10 degrees and less than or equal to 60 degrees, or when the first preset time is greater than or equal to 20 ms and less than or equal to 30 ms, the detection mechanism 170 can allow the controller 172 to issue a control signal. This increases the detection range of the detection mechanism 170. When the detection mechanism 170 is capable of detecting the moving part 171 and issuing a detection signal, the striker 131 is far from the stop position. Before the striker 131 stops at the stop position, in other words, before the motor 160 stops rotating, the detection mechanism 170 has ample time to issue a detection signal. The controller 172 also has ample time to brake the motor 160. The controller 172 can control the motor 160 in advance when the striking assembly 130 is far from the stop position, extending the time the controller 172 controls the motor 160. In this way, even if the first drive teeth 147 and the first meshing teeth 134 wear and the stop position changes from the initial stop position, the controller 172 can dynamically adjust the stop position so that the stop position is always in an ideal position. After the first drive teeth 147 and the first meshing teeth 134 wear and tear, the stop position will be closer to the top dead center position, making the fastener driver 100 prone to double strikes, posing a safety hazard and inconvenient to use. The detection mechanism 170 allows the controller 172 to send the control signal in advance. When the striking assembly 130 moves away from the stop position, the controller 172 can dynamically control the motor 160 in advance, ensuring that the stop position is always ideal, making the fastener driver 100 convenient and safe to use.

[0213] The first drive tooth 147 has a center point H. An angle i between a center point E of the moving member 171 and a center point H of the first drive tooth 147, with the rotation center point C of the drive member 142 as a vertex, is greater than or equal to 5 degrees and less than or equal to 30 degrees. In some embodiments, the angle i is greater than or equal to 7 degrees and less than or equal to 27 degrees. In some embodiments, the angle i is greater than or equal to 10 degrees and less than or equal to 25 degrees. The angle i is greater than or equal to 5 degrees and less than or equal to 30 degrees, and the moving member 171 is farther away from the first drive tooth 147, so that there is sufficient distance between the first preset position and the stop position. The first preset position is farther away from the stop position, allowing the controller 172 to perform other controls on the motor 160 before controlling the motor 160 to brake, such as the number of rotations, rotation time, deceleration, soft braking, etc., so that the motor 160 stops at the ideal position.

[0214] In this embodiment, the Hall sensor can detect the magnetic flux lines of the magnetic element 1711 at the first preset position. The surface magnetic field strength of the magnetic element 1711 is greater than or equal to 2800Gs and less than or equal to 3600Gs. In some embodiments, the surface magnetic field strength of the magnetic element 1711 is greater than or equal to 3000Gs and less than or equal to 3400Gs. In some embodiments, the surface magnetic field strength of the magnetic element 1711 is greater than or equal to 3100Gs and less than or equal to 3300Gs. The surface magnetic field strength of the magnetic element 1711 is strong, and the magnetic flux lines cover a large range and a long distance. The detection mechanism 170 can detect the moving part 171 earlier, and the controller 172 also has time to dynamically adjust the stop position so that the stop position is always in an ideal position.

[0215] The striker 131 travels a distance greater than or equal to 4 mm and less than or equal to 10 mm from reaching the first preset position range to the stop position. In some embodiments, the striker 131 travels a distance greater than or equal to 5 mm and less than or equal to 9 mm from reaching the first preset position range to the stop position. In some embodiments, the striker 131 travels a distance greater than or equal to 6 mm and less than or equal to 8 mm from reaching the first preset position range to the stop position. The longer the striker 131 travels from reaching the first preset position range to the stop position, the greater the detection range of the detection mechanism 170.

[0216] After controller 172 issues a control signal, it controls motor 160 to rotate a preset number of times before braking. In some embodiments, the preset number of times is greater than or equal to 1 and less than or equal to 5. In some embodiments, the preset number of times is greater than or equal to 2 and less than or equal to 4. In some embodiments, the preset number of times is greater than or equal to 2 and less than or equal to 3. Controller 172 can adjust the preset number of times based on actual conditions so that after motor 160 rotates the preset number of times, controller 172 brakes motor 160 again. During the braking process, motor 160 continues to rotate a certain number of times before stopping, achieving an ideal parking position.

[0217] After the controller 172 sends a control signal, braking is performed after a second preset time. The second preset time is greater than or equal to 4ms and less than or equal to 20ms. In some embodiments, the second preset time is greater than or equal to 6ms and less than or equal to 18ms. In some embodiments, the second preset time is greater than or equal to 8ms and less than or equal to 16ms. In some embodiments, the second preset time is greater than or equal to 10ms and less than or equal to 14ms. The controller 172 can adjust the second preset time according to actual conditions, so that after the motor 160 rotates for the second preset time, the controller 172 brakes the motor 160 again, and the motor 160 stops after continuing to rotate for a certain period of time, and the parking position is ideal.

[0218] As shown in Figures 17, 19, and 21, the driver 142 includes a moving member fixing layer 173, which is fixedly mounted on the first fixing layer 144 and rotates synchronously with the first fixing layer 144 and the second fixing layer 145. The moving member 171 is fixedly mounted on the moving member fixing layer 173 and rotates synchronously with the moving member fixing layer 173. The fastener driver 100 includes a guide assembly that guides the fastener 10 along the first straight line 101. The fastener 10 is in communication with at least a portion of the magazine 120, allowing the fastener 10 to move from the magazine 120 to the input port.

[0219] The fastener driver 100 includes a support frame 174. The support frame 174 connects the energy storage device 150 and the guide assembly 180. The support frame 174 is fixedly connected to the energy storage device 150, and the guide assembly 180 is fixedly connected to the support frame 174. The support frame 174 fixedly connects the energy storage device 150 and the guide assembly 180, ensuring high coaxiality between the energy storage device 150 and the guide assembly 180. The guide assembly 180 includes a first guide member 181 and a second guide member 182. The second guide member 182 includes an input port 1821. The input port 1821 communicates with at least a portion of the magazine 120. The support frame 174 includes a through hole 1741 through which the firing pin 131 passes, allowing it to move from the energy storage device 150 to the guide assembly 180 and, guided by the guide assembly 180, eject the fastener 10. The support frame 174 includes a first mounting portion 1742. The guide assembly 180 is mounted on the support frame 174 through the first mounting portion 1742. The first mounting portion 1742 is configured as a fixing screw. The screw passes through the guide assembly 180 and is fixed to the first mounting portion 1742. There can be multiple first mounting portions 1742. By having a center. At least part of the through-holes 1741 and at least one of the multiple first mounting portions 1742 are located on the first straight line 101. In this embodiment, there are three first mounting portions 1742, and the center of the through-hole 1741 and the two first mounting portions 1742 are all located on the first straight line 101. In this way, the energy storage device 150, the striker 131 and the guide assembly 180 are simple to assemble, low in cost, and high in process precision. When the striker 131 is in the energy storage device 150 and on the guide assembly 180, it always moves along the first straight line 101, and the guidance is more accurate.

[0220] In this embodiment, the guide assembly 180 includes a second mounting portion 1811, which is configured to mount the detection mechanism 170. The second mounting portion 1811 includes a protrusion formed on the first guide member 181. The detection mechanism 170 is fixedly mounted to the second mounting portion 1811 via screws. The support frame 174 includes a third mounting portion 1743. This third mounting portion 1743 is configured to mount the gear set 141 and the driver 142. The driver 142 is rotatably fixed to the third mounting portion 1743 via a bearing. The third mounting portion 1743 includes a tooth-shaped protrusion formed on the support frame 174. The detection mechanism 170 is mounted to the guide assembly 180, which is fixedly connected to the support frame 174. The driver 142 is mounted to the support frame 174, and the moving member 171 is fixedly mounted to the driver 142. This ensures a fixed positional relationship between the rotation axes of the detection mechanism 170 and the driver 142, enabling the detection mechanism 170 to accurately identify the position of the moving member 171 and minimizing errors.

[0221] As shown in Figures 22 to 24, in some embodiments, the detection mechanism 170 is not mounted on the guide assembly 180, but is instead mounted directly on the support frame 174. The support frame 174 includes a fourth mounting portion 1744, which is configured to mount the detection mechanism 170. The fourth mounting portion 1744 includes a protrusion formed on the support frame 174. The detection mechanism 170 is fixed to the fourth mounting portion 1744 by screws. The detection mechanism 170 and the driving member 142 are both mounted on the support frame 174. The positional relationship between the detection mechanism 170 and the rotation axis of the driving member 142 is fixed, allowing the detection mechanism 170 to accurately identify the position of the moving member 171 and reduce errors. The energy storage device 150, guide assembly 180, detection mechanism 170, and driving member 142 are all positioned by the support frame 174, resulting in simple assembly, compact structure, precise positioning, and high coaxiality between the energy storage device 150 and the guide assembly 180.

[0222] As shown in FIG. 25 , the distance between the top dead center position and the bottom dead center position is defined as the stroke L3 of the striking assembly 130. The fastener driver 100 can drive the fastener 10 within a preset length L4. The ratio of the stroke L3 of the striking assembly 130 to the preset length L4 is less than or equal to 1.5. In some embodiments, the ratio of the stroke L3 of the striking assembly 130 to the preset length L4 is less than or equal to 1.49, 1.48, 1.47, 1.46, 1.45, 1.44, 1.43, 1.42, 1.41, or 1.4. In some embodiments, the ratio of the stroke L3 of the striking assembly 130 to the preset length L4 is greater than or equal to 1.4 and less than or equal to 1.49. In some embodiments, the ratio of the stroke L3 of the striking assembly 130 to the preset length L4 is greater than or equal to 1.41 and less than or equal to 1.46. In some embodiments, the ratio of the stroke L3 of the striking assembly 130 to the preset length L4 is greater than or equal to 1.42 and less than or equal to 1.45. The ratio of the preset length L4 of the fastener 10 to the stroke L3 of the striking assembly 130 is small. The stroke L3 of the striking assembly 130 is short, but the fastener driver 100 can drive out longer fasteners 10. The length of the fastener driver 100 is short.

[0223] Stroke L3 is less than or equal to 80 mm. In some embodiments, stroke L3 is less than or equal to 85 mm, 84 mm, 83 mm, 82 mm, 81 mm, 79 mm, 78 mm, 77 mm, 76 mm, 75 mm, 74 mm, 73 mm, or 72 mm. In some embodiments, stroke L3 is greater than or equal to 74 mm and less than or equal to 82 mm. In some embodiments, stroke L3 is greater than or equal to 76 mm and less than or equal to 80 mm. A shorter stroke L3 allows the fastener driver 100 to have a shorter length.

[0224] The preset length L4 is greater than or equal to 50 mm. In some embodiments, the preset length L4 is greater than or equal to 51 mm, 52 mm, 53 mm, 54 mm, 55 mm, 56 mm, 57 mm, or 58 mm. In some embodiments, the preset length L4 is greater than 50 mm and less than or equal to 58 mm. In some embodiments, the preset length L4 is greater than or equal to 51 mm and less than or equal to 56 mm. The longer the preset length L4, the longer the fastener driver 100 can drive out fasteners 10.

[0225] As shown in FIG26 , the length L5 of the firing pin 131 is less than or equal to 165 mm. In some embodiments, the length L5 of the firing pin 131 is less than or equal to 164 mm, 163 mm, 162 mm, 161 mm, 160 mm, 159 mm, 158 mm, 157 mm, 156 mm, or 155 mm. In some embodiments, the length L5 of the firing pin 131 is greater than or equal to 155 mm and less than or equal to 165 mm. In some embodiments, the length L5 of the firing pin 131 is greater than or equal to 156 mm and less than or equal to 162 mm. The short length L5 of the firing pin 131 allows the fastener driver 100 to be shorter.

[0226] The striker 131 includes a toothed portion 137. The toothed portion of the main body 132 is the toothed portion 137. The portion of the main body 132 from the first meshing tooth 134 to the seventh meshing tooth 136 that contacts the driving member 142 is the toothed portion 137. The ratio of the length L6 of the toothed portion 137 to the preset length L4 is less than or equal to 1.21. In some embodiments, the ratio of the length L6 of the toothed portion 137 to the preset length L4 is less than or equal to 1.23, 1.22, 1.2, or 1.19. In some embodiments, the ratio of the length L6 of the toothed portion 137 to the preset length L4 is greater than or equal to 1.19 and less than or equal to 1.23. In some embodiments, the ratio of the length L6 of the toothed portion 137 to the preset length L4 is greater than or equal to 1.2 and less than or equal to 1.22. The shorter length L6 of the toothed portion 137 makes the length L5 of the striker 131 shorter.

[0227] As shown in FIG4 , the length L7 of guide assembly 180 is less than or equal to 108 mm. In some embodiments, the length L7 of guide assembly 180 is less than or equal to 113 mm, 112 mm, 111 mm, 110 mm, 109 mm, 107 mm, 106 mm, 105 mm, 104 mm, or 103 mm. In some embodiments, the length L7 of guide assembly 180 is greater than or equal to 103 mm and less than or equal to 113 mm. In some embodiments, the length L7 of guide assembly 180 is greater than or equal to 104 mm and less than or equal to 110 mm. A shorter guide assembly 180 allows the length of fastener driver 100 to be shorter.

[0228] As shown in Figures 25, 27, and 28, the first cylinder 151 includes a first inner wall 152. When the piston 122 moves within the first cylinder 151, the first inner wall 152 contacts the piston 122. The first inner wall 152 has a circular first cross-section 1521. The ratio of the stroke L3 of the striker 131 to the diameter d1 of the first cross-section 1521 is greater than or equal to 1.7 and less than or equal to 2.8. In some embodiments, the ratio of the stroke L3 of the striker 131 to the diameter d1 of the first cross-section 1521 is greater than or equal to 1.9 and less than or equal to 2.7. In some embodiments, the ratio of the stroke L3 of the striker 131 to the diameter d1 of the first cross-section 1521 is greater than or equal to 2.1 and less than or equal to 2.6. In some embodiments, the ratio of the stroke L3 of the striker 131 to the diameter d1 of the first cross-section 1521 is less than or equal to 2.5, 2.45, 2.4, 2.35, 2.3, 2.25, 2.2, 2.1, 2, 1.9, or 1.8. The ratio of the stroke L3 of the striker 131 to the diameter d1 of the first cross-section 1521 is small, and the diameter d1 is longer than the stroke L3.

[0229] The diameter of the driving member 142 is defined as the diameter of the circle formed by the centers of the multiple driving teeth 143. The ratio of the diameter d1 of the first cross-section 1521 to the diameter of the driving member 142 is greater than or equal to 0.9 and less than or equal to 1. In some embodiments, the ratio of the diameter d1 of the first cross-section 1521 to the diameter of the driving member 142 is greater than or equal to 1 and less than or equal to 1.1. The ratio of the diameter of the driving member 142 to the stroke L3 of the striker 131 is greater than or equal to 0.37 and less than or equal to 0.41. In some embodiments, the ratio of the diameter of the driving member 142 to the stroke L3 of the striker 131 is greater than or equal to 0.38 and less than or equal to 0.4.

[0230] The energy storage device includes a second cylinder 153. At least a portion of the first cylinder 151 is housed within the second cylinder 153. The second cylinder 153 includes a second inner wall 154. The second inner wall 154 has a circular second cross-section 1541. The ratio of the diameter d1 of the first cross-section 1521 to the diameter d2 of the second cross-section 1541 is greater than or equal to 0.6 and less than or equal to 0.7. In some embodiments, the ratio of the diameter d1 of the first cross-section 1521 to the diameter d2 of the second cross-section 1541 is greater than or equal to 0.6 and less than or equal to 0.65. In some embodiments, the ratio of the diameter d1 of the first cross-section 1521 to the diameter d2 of the second cross-section 1541 is greater than or equal to 0.5 and less than or equal to 0.7. In some embodiments, the ratio of the diameter d1 of the first cross-section 1521 to the diameter d2 of the second cross-section 1541 is greater than or equal to 0.53 and less than or equal to 0.63.

[0231] The diameter d1 of the first cross-section 1521 is greater than or equal to 28 mm and less than or equal to 36 mm. In some embodiments, the diameter d1 of the first cross-section 1521 is greater than or equal to 29 mm and less than or equal to 35 mm. In some embodiments, the diameter d1 of the first cross-section 1521 is greater than or equal to 30 mm and less than or equal to 34 mm. The product of the first cross-section 1521 of the first cylinder 151 and the stroke L3 is the gas displacement when the piston 122 moves from the bottom dead center position to the top dead center position within the first cylinder 151. The larger the diameter d1 of the first cross-section 1521, the greater the gas displacement.

[0232] The ratio of the striking energy output by the fastener driver 100 to the gas displacement is greater than or equal to 0.3 J / cm 3 and less than or equal to 0.7J / cm 3 In some embodiments, the ratio of the striking energy output by the fastener driver 100 to the gas displacement is greater than or equal to 0.35 J / cm 3 and less than or equal to 0.65J / cm 3 In some embodiments, the ratio of the striking energy output by the fastener driver 100 to the gas displacement is greater than or equal to 0.4 J / cm 3 and less than or equal to 0.6J / cm 3 In some embodiments, the ratio of the striking energy output by the fastener driver 100 to the gas displacement is greater than or equal to 0.45 J / cm 3 and less than or equal to 0.55J / cm 3 The striking energy corresponding to each unit of gas displacement is large, and the fastener driver 100 has high working efficiency.

[0233] Gas displacement greater than or equal to 54cm 3 and less than or equal to 71cm 3 In some embodiments, the gas displacement is greater than or equal to 58 cm 3 and less than or equal to 68cm 3 In some embodiments, the gas displacement is greater than or equal to 60 cm 3 and less than or equal to 66cm 3 .

[0234] The diameter d2 of the second cross-section 1541 is greater than or equal to 47 mm and less than or equal to 57 mm. In some embodiments, the diameter d2 of the second cross-section 1541 is greater than or equal to 50 mm and less than or equal to 54 mm. In some embodiments, the diameter d2 of the second cross-section 1541 is greater than or equal to 51 mm and less than or equal to 53 mm. In some embodiments, the diameter d2 of the second cross-section 1541 is greater than or equal to 45 mm and less than or equal to 60 mm.

[0235] The second cylinder 153 has a volume greater than or equal to 152 cm 3 and less than or equal to 186cm 3 In some embodiments, the volume is greater than or equal to 157 cm 3 and less than or equal to 181cm 3 In some embodiments, the volume is greater than or equal to 160 cm 3 and less than or equal to 178cm 3 In some embodiments, the volume is greater than or equal to 165 cm 3 and less than or equal to 173cm 3 .

[0236] The volume to gas displacement ratio is greater than or equal to 1.5 and less than or equal to 1.83. In some embodiments, the volume to gas displacement ratio is greater than or equal to 1.6 and less than or equal to 1.73. In some embodiments, the volume to gas displacement ratio is greater than or equal to 1.65 and less than or equal to 1.68.

[0237] As shown in FIG2 , the length L8 of the fastener driver 100 in the front-to-back direction is less than or equal to 295 mm. In some embodiments, the length L8 of the fastener driver 100 in the front-to-back direction is less than or equal to 294 mm, 293 mm, 292 mm, 291 mm, 290 mm, 289 mm, 288 mm, 287 mm, or 286 mm. The short length of the fastener driver 100 makes it compact and lightweight, making it easy to use and labor-saving.

[0238] Without the battery pack 115 installed, the fastener driver 100 weighs less than or equal to 2.3 kg. In some embodiments, the fastener driver 100 weighs less than or equal to 2.29 kg, 2.28 kg, 2.27 kg, 2.26 kg, 2.25 kg, 2.24 kg, 2.23 kg, or 2.22 kg. When the battery pack 115 is installed, the fastener driver 100 with the battery pack 115 installed weighs less than or equal to 2.9 kg. In some embodiments, the fastener driver 100 with the battery pack 115 installed weighs less than or equal to 2.91 kg, 2.89 kg, 2.88 kg, 2.87 kg, or 2.86 kg. The light weight of the fastener driver 100 makes it easy and comfortable for the user to use.

[0239] Without the battery pack 115 installed, the ratio of the weight of the fastener driver 100 to its front-to-back length L8 is less than or equal to 0.078 kg / cm. In some embodiments, the ratio of the weight of the fastener driver 100 to its front-to-back length L8 is less than or equal to 0.077 kg / cm, 0.076 kg / cm, 0.075 kg / cm, or 0.074 kg / cm. The fastener driver 100 has high output power, a short length, and a compact size, making it easy to use.

[0240] When the battery pack 115 is not installed, the ratio of the output power of the fastener driver 100 to its front-to-back length L8 is greater than or equal to 11.3 W / cm. In some embodiments, the ratio of the output power of the fastener driver 100 to its front-to-back length L8 is greater than or equal to 11.6 W / cm, 11.5 W / cm, 11.4 W / cm, 11.2 W / cm, or 11.1 W / cm. The ratio of the output power of the fastener driver 100 to its weight is greater than or equal to 150 W / kg. In some embodiments, the ratio of the output power of the fastener driver 100 to its weight is greater than or equal to 160 W / kg, 157 W / kg, 155 W / kg, 152 W / kg, 147 W / kg, 145 W / kg, 142 W / kg, or 140 W / kg. The fastener driver 100 has high output power and is lightweight, making it convenient for the user to hold the fastener driver 100 for extended periods of time.

[0241] As shown in Figures 29 to 34, the fastener driver 100 includes a runaway prevention assembly 183. This assembly 183 is configured to prevent the firing pin 131 from firing empty fasteners 10, potentially creating a dangerous situation. The fastener driver 100 includes a lifting member 124. The lifting member 124 uses a spring force to tightly arrange a row of fasteners 10 vertically within the magazine 120. The spring force is generated by an elastic member, such as a spring or coil spring. The lifting member 124 is configured to move the fasteners 10 so that they pass through the input port. After a fastener 10 is ejected, the fastener 10 is subjected to the force of the lifting member 124 and is lifted upward. The top fastener 10 in the row passes through the input port, awaiting ejection by the firing pin 131. The runaway prevention assembly 183 achieves this function by changing the position of the lifting member 124.

[0242] The magazine 120 is arranged adjacent to the main housing 111. The anti-flyback assembly 183 is arranged on the upper and outward side of the magazine 120, so interference from external objects can easily cause the anti-flyback assembly 183 to fail. The anti-flyback assembly 183 includes an anti-flyback assembly housing 1831. At least part of the anti-flyback assembly housing 1831 is arranged on the outside of the anti-flyback assembly 183 to prevent the anti-flyback assembly 183 from being interfered with by external objects. In the present embodiment, the anti-flyback assembly housing 1831 basically seals the anti-flyback assembly 183, effectively preventing the anti-flyback assembly 183 from being interfered with by external objects or being infiltrated with dust, thereby extending the service life of the fastener driver 100.

[0243] As shown in Figures 32 to 34, the fastener driver 100 includes a depth adjustment assembly 184. The depth adjustment assembly 184 includes a stopper 1841, a push rod 1842, and a trigger 1843. The trigger rod 121 is connected to the push rod 1842. The trigger rod 121 can be attached to the push rod 1842 using a retaining spring, a protrusion and recess, or a magnetic element, facilitating quick replacement and installation of the trigger rod 121 if damaged. When the trigger rod 121 abuts against the workpiece and moves, the push rod 1842 moves with the trigger rod 121. The push rod 1842 is configured to abut the stopper 1841. The trigger 1843 allows the user to adjust the position of the push rod 1842 against the stopper 1841 to adjust the nailing depth. The stopper 1841 includes a stepped structure for the push rod 1842 to abut. The push rod 1842 is rotatably connected to the stopper 1841. When push rod 1842 moves forward and backward along with trigger lever 121, it contacts and drives stopper 1841 forward and backward. Stopper 1841 is mounted with a magnet. Safety Hall effect sensor 185 is located within anti-runaway assembly 183. When safety Hall effect sensor 185 detects the magnet, the safety switch is activated, allowing the user to operate fastener driver 100 to strike fastener 10.

[0244] Anti-runaway assembly 183 includes a stopper 1832. Stopper 1832 is rotatable about third straight line 103. Lifting member 124 includes a pusher 1241. Pusher 1241 is a protrusion formed on lifting member 124 and protruding toward stopper 1832. When the fasteners 10 are used up, pusher 1241 moves with lifting member 124 to the upper side of magazine 120 and pushes stopper 1832 to rotate about third straight line 103. Stopper 1832 includes a first stopper 1833. Stopper 1841 includes a second stopper 1844. When lifting member 124 pushes stopper 1832 to rotate, first stopper 1833 abuts second stopper 1844, preventing stopper 1832 from moving backward. The stopper 1841 cannot move backward, the push rod 1842 and the trigger rod 121 cannot move backward, and the safety switch cannot be opened. The fastener driver 100 cannot work when the fasteners 10 are consumed, and the firing pin 131 cannot be ejected when the fasteners 10 are consumed.

[0245] As shown in Figures 3 and 33, fastener driver 100 includes a light-emitting mechanism 190. Multiple light-emitting mechanisms 190 may be provided. In some embodiments, a runaway prevention Hall effect sensor 186 is also provided within anti-runaway assembly 183. When anti-runaway Hall effect sensor 186 detects the magnet on shift member 1841, while safety Hall effect sensor 185 does not, light-emitting mechanism 190 changes color or frequency to alert the user, providing convenience and safety.

[0246] As shown in Figures 3, 4, and 35, at least one light-emitting mechanism 190 is mounted directly above the guide assembly 180. The at least one light-emitting mechanism 190, located directly above the guide assembly 180, is mounted on the main housing 111. The main housing 111 includes a protective structure 191. The light-emitting mechanism 190 is mounted on the protective structure 191. In this embodiment, the protective structure 191 is formed on the main housing 11. The protective structure 191 has a horn-shaped, upward-pointing protrusion to protect the light-emitting mechanism 190 from damage caused by impact when the fastener driver 100 is dropped. The horn-shaped protrusion of the protective structure 191 is formed as a V-shaped groove when viewed from the front. The light emitted by the light-emitting mechanism 190 is reflected by the V-shaped groove and can project a V-shaped, arrow-shaped, or triangular light spot on the workpiece to indicate the nailing position, providing convenience for the user. In some embodiments, the protective structure 191 can also allow the light-emitting mechanism 190 to project any projection shape, such as a line or circle, on the workpiece to indicate the nailing position.

[0247] In this embodiment, fastener driver 100 is a pre-inflated fastener driver, requiring it to be pre-inflated in energy storage device 150 before use. The air pressure in energy storage device 150 is higher than atmospheric pressure, thereby enhancing the striking force of fastener driver 100. Fastener driver 100 is typically pre-inflated by the manufacturer before purchase. During use, energy storage device 150 may gradually leak air, necessitating re-inflating of energy storage device 150.

[0248] As shown in Figures 36 to 38, the energy storage device 150 includes a vent 155. The energy storage device 150 is inflated and deflated through the vent 155. The vent 155 is located at the rear of the second cylinder 153. The vent 155 includes a hole connected to the interior of the energy storage device 150. The controller 172 controls the motor 160 to brake and controls the striker 131 to stop at the stop position. The stop position is between the top dead center position and the bottom dead center position. In the stop position, the striking assembly 130 is still engaged with the driving member 142. When the striking assembly 130 reaches the top dead center position, or when the striking assembly 130 moves backward past the top dead center position, the striking assembly 130 is decoupled from the driving member 142. The striking assembly 130 and the driving member 142 do not form a force interaction relationship, and the movement of the striking assembly 130 is not affected by the driving member 142.

[0249] The fastener driver 100 has an operating state and a maintenance state. In the operating state, the vent 155 is not connected to the atmosphere. During use of the fastener driver 100, due to prolonged vibration, unavoidable manufacturing tolerances, and factors such as the storage environment, a small amount of gas may escape from the energy storage device 150 into the atmosphere through the vent 155, causing the striking force of the fastener driver 100 to decrease. When the fastener driver 100 is not being used for nailing, the striking assembly 130 remains in the parked position, with the striking assembly 130 engaged with the driver 142. As shown in Figure 6, the transmission mechanism 140 includes a clutch assembly 149. When the striking assembly 130 and the driver 142 are engaged, the clutch assembly 149 restricts forward movement of the striking assembly 130. The clutch assembly 149 includes a one-way clutch. When the fastener driver 100 is viewed from above, the driver 142 rotates counterclockwise to drive the striking assembly 130 backward. The one-way clutch prevents the drive member 142 from rotating clockwise to prevent the striking assembly 130 from moving forward. In the rest position, the force applied by the compressed gas to the striking assembly 130, which tends to move the striking assembly 130 forward, is balanced by the force applied by the clutch assembly 149 to the striking assembly 130, which tends to move the striking assembly 130 backward.

[0250] As shown in FIG37 , in the maintenance mode, the vent 155 can be connected to the atmosphere in response to user operation to allow the energy storage device 150 to be inflated and deflated. The user or maintenance personnel can re-inflate the fastener driver 100. Before inflation, the energy storage device 150 is first deflated. Some of the gas in the energy storage device 150 is discharged to the atmosphere through the vent 155. The air pressure in the energy storage device 150 decreases from above atmospheric pressure to substantially equal to atmospheric pressure. The force exerted by the compressed gas on the striking assembly 130 decreases. As the compressed gas gradually converts to atmospheric gas, the atmospheric gas in the energy storage device 150 no longer exerts a force on the striking assembly 130. As the force exerted by the gas on the striking assembly 130, which tends to move it forward, gradually decreases to zero, the position of the striking assembly 130 moves from the rest position toward the top dead center. Before the energy storage device 150 is inflated, the striking assembly 130 moves rearward to and remains in a ready position, past the rest position and close to the top dead center. Alternatively, the striking assembly 130 moves backward to and remains at the inflation position that reaches or exceeds the top dead center position. Deflation before the energy storage device 150 is inflated reduces the air pressure in the energy storage device 150, thereby providing the possibility for safely inflating the energy storage device 150.

[0251] If the energy storage device 150 is inflated while the striking assembly 130 is engaged with the driver 142, even if the energy storage device 150 is already fully inflated, the striking assembly 130 will not move forward due to the stop provided by the clutch assembly 149. While the user can continue to add air to the energy storage device 150, excessive pressure within the energy storage device 150 could easily create a danger during nailing. By deflating the energy storage device 150 before inflating, the striking assembly 130 can directly reach or exceed the top dead center position and disengage from the driver 142 after the energy storage device 150 is deflated. This allows the user or maintenance personnel to inflate the energy storage device 150 without overinflation or the danger of firing the firing pin 131.

[0252] In some embodiments, when the energy storage device 150 is deflated through the vent 155, the striking assembly 130 moves rearward to and remains in the charging position. After the energy storage device 150 is deflated, the striking assembly 130 directly reaches or passes the top dead center position, which facilitates use and conserves energy. In some embodiments, after the energy storage device 150 is deflated, the striking assembly 130 moves to the ready position. The transmission mechanism 140 drives the striking assembly 130 from the ready position to and remains in the charging position. After the energy storage device 150 is deflated, the user presses the trigger to cause the fastener driver 100 to dry fire. The user may press the trigger once or multiple times. The motor 160 rotates, driving the driver 142 to rotate. Because the air pressure within the energy storage device 150 is atmospheric pressure, there is no potential reaction force behind the striking assembly 130, allowing the driver 142 to propel the striking assembly from the ready position to the charging position. The striking assembly 130 is decoupled from the driver 142, allowing the energy storage device 150 to be safely inflated.

[0253] When the energy storage device 150 is inflated, when the air pressure in the energy storage device 150 gradually increases to exceed the atmospheric pressure, the striking assembly 130 moves forward toward the bottom dead center position. As the energy storage device 150 continues to inflate, the striking assembly 130 moves forward to the bottom dead center position. When the energy storage device 150 is fully inflated, the striking assembly 130 stays at the bottom dead center position. The striking assembly 130 moves toward the bottom dead center as the energy storage device 150 is inflated. The striking assembly 130 moves slowly, the moving distance is controllable, and the inflation process is safe and reliable. When the energy storage device 150 is fully inflated, the striking assembly 130 stays at the bottom dead center position. After the user presses the trigger again, the firing pin 131 retracts backward and does not shoot out directly, which is not likely to cause danger and is safe to use.

[0254] The motor 160 brakes to stop the rearward movement of the striking assembly 130. When the motor 160 brakes, it is configured to rotate a first number of braking revolutions between the start and end of braking, before the energy storage device 150 is charged (i.e., in a maintenance state). After the energy storage device 150 is charged (i.e., in an operating state), the motor 160 rotates a second number of braking revolutions between the start and end of braking. The difference between the first and second number of braking revolutions is greater than or equal to 5 revolutions and less than or equal to 15 revolutions. In some embodiments, the difference between the first and second number of braking revolutions is greater than or equal to 6 revolutions and less than or equal to 12 revolutions. In some embodiments, the difference between the first and second number of braking revolutions is greater than or equal to 7 revolutions and less than or equal to 11 revolutions. In some embodiments, the difference between the first and second number of braking revolutions is approximately 9 revolutions. In some embodiments, the first number of braking revolutions is greater than or equal to 11 revolutions and less than or equal to 13 revolutions. In some embodiments, the first number of braking revolutions is approximately 12 revolutions. In some embodiments, the second number of braking revolutions is greater than or equal to 1 revolution and less than or equal to 5 revolutions. In some embodiments, the second number of braking turns is greater than or equal to 2 turns and less than or equal to 4 turns. In some embodiments, the second number of braking turns is approximately 3 turns.

[0255] The difference between the first and second braking revolutions is controlled within a certain range. This ensures that the driver 142 is properly positioned when the motor 160 completes braking. In the maintenance state, the motor 160 drives the driver 142 to rotate a number of revolutions sufficient to prevent the driver 142 from engaging with the striking assembly 130 due to too few revolutions, nor from engaging with the striking assembly 130 due to too many revolutions. The striking assembly 130 can move toward bottom dead center during inflation without being hindered by the driver 142.

[0256] In some embodiments, the fastener driver 100 includes a detection assembly that detects the position of the striking assembly 130 relative to the inflation position. Thus, the controller 172 can control the inflation level of the energy storage device 150. The fastener driver 100 also includes a display that displays the position of the striking assembly 130. Thus, the user can accurately determine the inflation level of the energy storage device 150.

[0257] As shown in Figure 38, the process of charging the fastener driver 100 is as follows: at S1, the energy storage device 150 is deflated. The striking assembly 130 moves backward from the parking position. At S2, if the striking assembly 130 moves to the charging position, the process proceeds to S3 and the energy storage device 150 is inflated. At S4, the striking assembly 130 moves to the bottom dead center, and the energy storage device 150 is completely inflated. After the energy storage device 150 is deflated at S1, at S5, if the striking assembly 130 moves to the ready position, the process proceeds to S6, the user presses the trigger, and the transmission mechanism 140 drives the striking assembly 130 to the charging position. Thereafter, the process proceeds to S3 and the energy storage device 150 is inflated. Finally, at S4, the striking assembly 130 moves to the bottom dead center, and the energy storage device 150 is completely inflated.

[0258] As shown in Figures 25 and 39 to 41, the fastener driver 100 requires the use of an inflation adapter 200 for inflation. The inflation adapter 200 is configured to inflate a device to be inflated, such as the fastener driver 100. If the energy storage device 150 leaks, the performance of the fastener driver 100 may be reduced. By inflating the fastener driver 100 with the inflation adapter 200, the performance of the fastener driver 100 can be restored. As shown in Figure 25, the device to be inflated includes an air storage space 201. The air storage space 201 of the fastener driver 100 is formed by the first cylinder 151, the second cylinder 153, and the piston 122 when they are at bottom dead center, forming a space capable of storing gas. The inflation adapter 200 includes a first connection end 210 and a second connection end 220. The first connection end 210 is configured to connect to a gas source, such as pressurized or unpressurized air, nitrogen, helium, etc. The first connection end 210 is provided with an air inlet 211. The air source enters the inflation adapter 200 through the air inlet 211. The second connection end 220 is configured to connect to the vent 155. When the second connection end 220 is connected to the vent 155, the inflation adapter 200 is connected to the fastener driver 100.

[0259] The inflation adapter 200 includes an air outlet 221. In this embodiment, the air outlet 221 is provided on the second connection end 220. The air outlet 221 is connected to the vent portion 155 so that gas from the gas source flows from the air inlet 211 into the inflation adapter 200, flows through the inflation adapter 200, and then flows out from the air outlet 221 to the vent portion 155. The vent portion 155 is connected to the gas storage space 201, and the gas is ultimately stored in the gas storage space 201. There is at least one air flow path for gas flow between the air inlet 211 and the gas storage space 201. The air flow path from the air inlet 211 to the gas storage space 201 is defined as the inflation channel 230.

[0260] The second connecting end 220 can move toward the vent 155 to an extreme position. As the second connecting end 220 moves to the extreme position, the distance between the second connecting end 220 and the vent 155 gradually decreases. The second connecting end 220 includes an engaging portion 222. The engaging portion 222 engages with the vent 155 to connect the inflation adapter 200 to the fastener driver 100. When the second connecting end 220 initially engages with the vent 155, the second connecting end 220 and the vent 155 begin to establish a connection. When the second connecting end 220 moves to the extreme position, the second connecting end 220 and the vent 155 establish a tight connection. The engaging portion 222 allows the second connecting end 220 to remain at least at the extreme position. Thus, when the second connecting end 220 moves to the extreme position, the engaging portion 222 maintains the second connecting end 220 in the extreme position, establishing a continuous and tight connection between the second connecting end 220 and the vent 155.

[0261] The meshing portion 222 is formed with threads. The vent portion 155 is also formed with threads. The meshing portion 222 is meshed with the vent portion 155 through threads, and the second connecting end 220 is maintained in an extreme position relative to the vent portion 155 through the meshing of the threads. The connection between the inflation adapter 200 and the fastener driver 100 is tight and reliable. In some embodiments, the vent portion 155 and the meshing portion 222 can also be meshed by other means such as grooves and protrusions, magnetic elements, etc. In some embodiments, the inflation adapter 200 is provided with a knurled structure to facilitate the user to easily and comfortably tighten the inflation adapter 200 to the fastener driver 100 by hand.

[0262] As shown in Figure 42, a valve 156 is provided at the vent portion 155. When the valve 156 is open, the vent portion 155 allows gas to enter the gas storage space 201. When the valve 156 is not open, the vent portion 155 does not allow gas to enter the gas storage space 201. As shown in Figure 41, the inflation adapter 200 includes a drive assembly 240. The drive assembly 240 is configured to open the valve 156 of the vent portion 155. The drive assembly 240 has at least a first position and a second position. In the first position, the drive assembly 240 opens the valve 156. In the second position, the drive assembly 240 does not open the valve 156. That is, in the first position, the inflation channel 230 is opened to allow airflow. In the second position, the inflation channel 230 is closed to prevent airflow.

[0263] When the second connecting end 220 is in the extreme position, the drive assembly 240 can at least be in the second position. When the second connecting end 220 is in the extreme position, the drive assembly 240 can at least be in the second position in which the valve 156 is not open and the inflation channel 230 is closed. When the second connecting end 220 moves toward the vent 155, including after the second connecting end 220 moves toward the vent 155 to the extreme position, the drive assembly 240 will not immediately open the valve 156 or the inflation channel 230. The drive assembly 240 does not open the valve 156 as the second connecting end 220 reaches the extreme position. Before inflation begins, the gas storage space 201 will not be connected to the atmosphere. The gas in the gas storage space 201 will not escape into the atmosphere, and thus will not reduce the air pressure in the energy storage device 150, thereby reducing the inflation efficiency and quality.

[0264] After the second connection end 220 reaches the limit position, the drive assembly 240 can at least move to the first position. After the second connection end 220 reaches the limit position, the drive assembly 240 can at least move to the first position in which the valve 156 is open and the inflation channel 230 is open. The drive assembly 240 can move to the first position to open the valve 156 after the second connection end 220 is tightly connected to the vent portion 155. The inflation adapter 200 and the gas storage space 201 are connected after the second connection end 220 is tightly connected to the vent portion 155. The gas in the gas storage space 201 will not leak into the atmosphere, the inflation efficiency and quality are improved, and the use is convenient and reliable.

[0265] As shown in Figures 39 to 44, the inflation adapter 200 includes an operating portion 250. The operating portion 250 is for the user to operate to drive the drive assembly 240 to move. The operating portion 250 is configured to move along the fourth direction 104 under the user's operation. The drive assembly 240 is configured to be driven by the operating portion 250 to move along the fourth direction 104. The drive assembly 240 and the operating portion 250 have the same movement direction. When the user operates the operating portion 250 to move along the fourth direction 104, the operating portion 250 drives the drive assembly 240 to move along the fourth direction 104, resulting in a simple structure and convenient and comfortable use. In some embodiments, the operating portion 250 and the drive assembly 240 have different movement directions. The operating portion 250 can also rotate to drive the drive assembly 240 to move, and the drive assembly 240 can also be driven to rotate by the operating portion 250. The operating portion 250 includes a handle 251. The handle 251 includes a nearly spherical portion and a flat portion. The user grasps the nearly spherical portion with fingers and places the palm on the flat portion, pressing the operating portion 250 along the fourth direction 104 for comfortable use. In some embodiments, the handle 251 may also be in other shapes, such as a plate or column.

[0266] The inflation adapter 200 includes a housing 260 and a stopper 270. The stopper 270 is disposed on the housing 260. The second connection end 220 is located at one end of the housing 260, and the stopper 270 is located at the end of the housing 260 away from the second connection end 220. The operating portion 250 is located at the end away from the second connection end 220, and the stopper 270 is located between the operating portion 250 and the second connection end 220. The first connection end 210 is disposed on the operating portion 250. The stopper 270 is configured to limit the movement of the operating portion 250. When the operating portion 250 abuts the stopper 270, the stopper 270 prevents the operating portion 250 from further movement in the fourth direction 104. In some embodiments, the inflation adapter 200 includes a retaining portion. After the operating portion 250 moves a certain distance, the retaining portion holds the operating portion 250 in place and prevents further movement. The retaining portion may include threads, grooves and protrusions, magnetic elements, etc.

[0267] The drive assembly 240 includes a first drive member 241 and a second drive member 242. The operating portion 250 drives the first drive member 241. The first drive member 241 drives the second drive member 242. The first drive member 241 is located between the operating portion 250 and the second drive member 242. One end of the first drive member 241 abuts against the operating portion 250 and has an interference fit with the operating portion 250, and the other end of the first drive member 241 abuts against the second drive member 242. The first drive member 241 extends basically along the fourth direction 104 and is basically cylindrical. The first drive member 241 includes a through hole 243 connected to the air inlet 211. The through hole 243 extends along the fourth direction 104 and constitutes a part of the inflation channel 230. A connecting hole 244 is formed at one end of the first drive member 241 close to the second drive member 242, and the connecting hole 244 allows the airflow flowing through the through hole 243 to flow out from the first drive member 241.

[0268] The inflation adapter 200 includes a first inflation chamber 281 and a second inflation chamber 282. The first inflation chamber 281 accommodates a portion of the first driving member 241 and the first elastic member 283. The second inflation chamber 282 accommodates a portion of the second driving member 242 and the second elastic member 284. The first elastic member 283 is sleeved onto the first driving member 241. The second elastic member 284 is sleeved onto the second driving member 242. The first driving member 241 includes a first pushing portion 245. The first pushing portion 245 is a circumferential protrusion formed on the first driving member 241. One end of the first pushing portion 245 abuts the limit member, and the other end abuts the first elastic member 283. The second elastic member 284 includes a second pushing portion 246. The second pushing portion 246 is a circumferential protrusion formed on the second driving member 242. One end of the second pushing portion 246 abuts the first driving member 241, and the other end abuts the second elastic member 284. When the user presses the operating portion 250 to drive the drive assembly 240 to move, the first pushing portion 245 and the second pushing portion 246 respectively abut against the first elastic member 283 and the second elastic member 284, and bias the first elastic member 283 and the second elastic member 284 in the pressing direction. The first elastic member 283 and the second elastic member 284 are deformed and accumulate elastic potential energy. When the user releases the operating portion 250, the first elastic member 283 and the second elastic member 284 respectively restore their shapes in the direction opposite to the pressing direction, and abut against the first pushing portion 245 and the second pushing portion 246 respectively, driving the drive assembly 240 to move in the direction opposite to the pressing direction, and the drive assembly 240 is reset. The second driving member 242 and the first driving member 241 are two separate parts, which is convenient for manufacturing and saves costs. The second driving member 242 and the first driving member 241 can be driven by the first elastic member 283 and the second elastic member 284 respectively, and the movement of the drive assembly 240 is stable and reliable. The driving assembly 240 can be reset immediately after the inflation is completed, thereby preventing gas leakage when the inflation adapter 200 is disassembled.

[0269] The inflation adapter 200 includes a first sealing member 285. The first sealing member 285 seals the first inflation chamber 281 relative to the second inflation chamber 282. The housing 260 has a first inner wall 261. The first sealing member 285 is positioned over one end of the first driver 241 near the second driver 242 and forms an interference fit with the first inner wall 261. This ensures that when air flows out of the first driver 241 through the connection hole 244 and into the second inflation chamber 282, it does not return to the first inflation chamber 281, resulting in improved inflation efficiency. The second inflation chamber 282 forms part of the inflation channel 230.

[0270] The second driving member 242 extends substantially along the fourth direction 104 and is substantially cylindrical. The housing 260 has a second inner wall 262. A portion of the second driving member 242 is accommodated within the second inner wall 262 and has a clearance fit therewith. After passing through the second plenum chamber 282, the airflow passes through the gap 263 between the second driving member 242 and the second inner wall 262, ultimately flowing into the air storage space 201. The gap 263 between the second driving member 242 and the second inner wall 262 constitutes the final portion of the plenum passage 230.

[0271] The inflation adapter 200 includes a second sealing member 286. The second sealing member 286 is sleeved onto the engagement portion 222. The second sealing member 286 seals the second connecting end 220 relative to the vent 155. When the second connecting end 220 moves to its limit position, the engagement portion 222 maintains the second connecting end 220 in that position, and the second sealing member 286 forms a sealed space between the inflation passage 230 and the gas storage space 201.

[0272] The second driving member 242 includes a trigger portion 247. The trigger portion 247 can be operated by a user to open the valve 156. The trigger portion 247 protrudes from the air outlet 221 or retracts into the air outlet 221 as the second driving member 242 moves. When the second connecting end 220 moves to the extreme position, the trigger portion 247 protrudes from the air outlet 221 to open the valve 156.

[0273] The threads of the vent 155 are provided on the valve 156. The valve 156 includes a trigger rod 1561. When the user operates the operating portion 250, the trigger portion 247 of the second driving member 242 abuts against the trigger rod 1561 to drive the trigger rod 1561 to move. The trigger rod 1561 moves to open and close the valve 156.

[0274] The process of inflating the gas adapter 200 using the gas adapter is as follows: the user first connects the gas adapter 200 to the fastener driver 100 via the engagement portion 222. The second connection end 220 moves to its limit position, at which point the drive assembly 240 is in the second position, which does not open the valve 156. After the gas adapter 200 is tightly connected to the fastener driver 100, when the user operates the operating portion 250 for the first time, the drive assembly 240 moves from the second position to the first position, opening the valve 156. After the valve 156 is opened, the user can inflate the energy storage device 150. When the user operates the operating portion 250 again, the drive assembly 240 returns from the first position to the second position, closing the valve 156, and inflation is complete. The user then disconnects the gas adapter 200 from the fastener driver 100 via the engagement portion 222. Leakage does not occur throughout the inflation process. Inflation only begins after the user operates the operating portion 250, allowing the user to control the timing of inflation, making it convenient to use.

[0275] The air source is connected to the air inlet 211 via the air inlet pipe 212. In some embodiments, a quick connector is provided between the air inlet pipe 212 and the air inlet 211 to facilitate connection of the inflation adapter 200 to the air source. The air inlet 211 extends substantially perpendicular to the fourth direction 104. In this way, the longer air inlet pipe 212 is connected to the air inlet 211 substantially perpendicular to the first direction, and the air inlet pipe 212 does not hinder the user from operating the operating portion 250 along the fourth direction 104, making it comfortable and convenient to use. In some embodiments, the air inlet 211 may also extend in other directions, such as parallel to the fourth direction 104. The first connecting end 210 is rotatable relative to the second connecting end 220, making it convenient for the user to inflate the fastener driver 100 from different directions. In this embodiment, the operating portion 250 and the air inlet 211 are rotatable relative to the housing 260.

[0276] In this embodiment, the inflation adapter 200 further includes a filter 290. The filter 290 can filter the air, thereby improving the purity of the gas charged into the energy storage device 150, preventing dust from entering the energy storage device 150, and improving the striking force and service life of the fastener driver 100. The filter 290 is connected to the air inlet 211 to allow filtered air to enter the air inlet 211. The air inlet pipe 212 is connected to the filter 290 via a quick connector. The filter 290 is connected to the air inlet 211 and moves with the movement of the operating part 250. The gas in the air source enters the filter 290 from the air inlet pipe 212, is filtered by the filter 290, and then enters the inflation channel 230 from the air inlet 211, thereby preventing dust from entering the energy storage device 150 and reducing the friction resistance during the movement of the piston 122.

[0277] As shown in Figure 45, in some embodiments, the inflation adapter 200 may also be equipped with a meter 291. During inflation, the air pressure in the inflation channel 230 and the air storage space 201 is the same. The meter 291 measures the air pressure in both the inflation channel 230 and the air storage space 201. The meter 291 includes a display and buttons. The display shows the measured air pressure value, making it easy for the user to see the measured air pressure. The buttons allow the user to operate the meter 291, such as powering on, zeroing, and calibrating it. The use of the meter 291 is similar to the inflation process. The user first moves the second connecting end 220 to the limit position to establish a seal between the inflation adapter 200 and the fastener driver 100. Then, the user operates the operating unit 250 to open the valve 156 to measure the air pressure. After measuring the air pressure, the user operates the operating unit 250 to close the valve 156, breaking the seal between the inflation adapter 200 and the fastener driver 100. The user does not need to re-inflate the fastener driver 100 to measure the air pressure, making it convenient and quick to use. After valve 156 opens, a small amount of gas within gas storage space 201 diffuses into the charging adapter 200 and meter 291, causing a slight decrease in the air pressure within energy storage device 150. The internal volume of meter 291 containing gas is less than or equal to 5% of the internal volume of gas storage space 201. This minimizes the amount of gas contained within meter 291 compared to the internal volume of gas storage space 201, ensuring minimal pressure drop within energy storage device 150 and accurate pressure measurement by meter 291. In some embodiments, meter 291 can utilize a calibration function to compensate for any pressure drop within energy storage device 150, ensuring accurate pressure measurement.

[0278] As shown in Figures 46 to 49, a portion of the magazine 120 is enclosed by the housing 110. The magazine 120 is secured to the main housing 111. The main housing 111 includes a securing rib 125. The securing rib 125 defines the mounting position of the magazine 120. The securing rib 125 is formed with a positioning slot 126. The positioning slot 126 secures the magazine 120 to the main housing 111 along its length. The magazine 120 includes a magazine shell 127. The magazine shell 127 is confined within the positioning slot 126. The ratio of the length L9 of the securing rib 125 to the length L10 of the magazine 120 is greater than or equal to 0.3. In some embodiments, the ratio of the length L9 of the securing rib 125 to the length L10 of the magazine 120 is greater than or equal to 0.4. In some embodiments, the ratio of the length L9 of the securing rib 125 to the length L10 of the magazine 120 is greater than or equal to 0.5. In this way, most of the length of the magazine 120 can be fixed by the positioning groove 126 and wrapped by the main shell 111. The magazine 120 is easy to install, stable, and not easy to shake.

[0279] As shown in FIG. 50 to FIG. 55 , the present application further provides a fastener driver 300 according to another embodiment. The structure of the fastener driver 300 is substantially the same as that of the fastener driver 100 .

[0280] The fastener driver 300 includes a housing 310. The housing 310 includes a main housing 311, a transmission portion 312, and a grip portion 313 for the user to hold. The transmission portion 312 houses the motor 160. The transmission portion 312 is disposed in front of the grip portion 313. The motor 160 is disposed in front of the grip portion 313. When the fastener driver 300 is viewed from the front-to-back direction, the grip portion 313, the energy storage device 150, and the motor 160 have a center line. The center line of the energy storage device 150 when viewed from the front-to-back direction is designated as Y1, the center line of the grip portion 313 when viewed from the front-to-back direction is designated as Y2, and the center line of the motor 160 when viewed from the front-to-back direction is designated as Y3. It should be noted that the center line refers to a characteristic line formed by sequentially connecting the center points of the grip portion 313, the energy storage device 150, and the motor 160 in the width direction when viewed from the front-to-back direction. When the holding portion 313, the energy storage device 150 or the motor 160 is tilted, the inclination of the center line changes with the inclination of the holding portion 313, the energy storage device 150 or the motor 160, but the center line is still located in the middle position in the width direction of the holding portion 313, the energy storage device 150 or the motor 160.

[0281] The centerline Y2 of the grip 313 is at least partially positioned between the centerline Y1 of the energy storage device 150 and the centerline Y3 of the motor 160. Because the driver 142 drives the striker 131 from the side of the striker 131, when viewing the fastener driver 300 from the front-to-back direction, the striker 131 and the driver 142 are offset from each other. The energy storage device 150, which houses the striker 131, and the motor 160, which drives the driver 142, are also offset from each other. The motor 160 is located on the right side of the energy storage device 150. The motor 160 is relatively heavy. The motor 160 is connected to the gearbox 1401, which houses the gear train 141. The gearbox 1401 and the gear train 141 are also relatively heavy. Therefore, when a user grips the grip 313 to operate the fastener driver 300, the right side of the user's hand bears more weight. This makes it easy for the user's hand to flip to the right when using the fastener driver 300. The centerline Y2 of the grip 313 is at least partially positioned between the centerline Y1 of the energy storage device 150 and the centerline Y3 of the motor 160. Specifically, the centerline Y2 of the grip 313 is positioned between the centerline Y1 of the main housing 311 and the centerline Y3 of the transmission unit 312. The centerline Y2 of the grip 313 is to the right of the centerline Y1 of the energy storage device 150 and to the left of the centerline Y3 of the motor 160. This allows the user's grip to be offset from the centerline Y1 of the energy storage device 150, with the grip positioned closer to the centerline Y3 of the motor 160. In the left-right direction, the user's hand is positioned closer to the heavier motor 160 and transmission mechanism, making the fastener driver 300 comfortable to use and evenly weighted, preventing the user's hand from tipping over. In this embodiment, the centerline Y2 of the grip 313 is positioned between the centerline Y1 of the energy storage device 150 and the centerline Y3 of the motor 160. The centerline Y2 of the grip 313 is substantially parallel to the centerline Y1 of the energy storage device 150. The center line Y2 of the grip portion 313 is substantially parallel to the center line Y3 of the motor 160. The center line Y3 of the motor 160 is substantially coincident with the rotation axis of the motor 160.

[0282] The fastener driver 300 has a center of gravity G. The center of gravity G of the fastener driver 300 is located on the side of the energy storage device 150 close to the motor 160. The center line Y2 of the gripping portion 313 is at least partially disposed between the center line Y1 of the energy storage device 150 and the center of gravity G. In the left-right direction, the user's gripping position is closer to the center of gravity G of the fastener driver 300, and the downward force exerted by the weight of the motor 160 and the gear box 1401 can act more on the user's hand and be supported by the wrist and arm, rather than being concentrated on one side of the user's hand. The user's hand is not easily flipped left or right, and the use is comfortable, safe, and weight-balanced. When the user uses the fastener driver 300 for a long time, it is not easy to feel tired.

[0283] As shown in Figures 53 and 54, the fastener driver 300 includes a coupling portion 314. The centerline of the coupling portion 314 when viewed from the front-to-back direction is designated as Y4. The centerline Y4 of the coupling portion 314 is at least partially positioned between the centerline Y1 of the energy storage device 150 and the centerline Y3 of the motor 160. The centerline Y4 of the coupling portion 314 and the centerline Y2 of the grip portion 313 are coplanar. The centerline Y4 of the coupling portion 314 is close to the center of gravity G of the fastener driver 300, making the fastener driver 300 stable when placed vertically and less likely to fall over. The coplanarity of the centerline Y4 of the coupling portion 314 and the centerline Y2 of the grip portion 313 contributes to the low manufacturing cost of the fastener driver 300. As shown in Figure 55, the main housing 311 includes a first housing 3112 and a second housing 3113. The first housing 3112 and the second housing 3113 are bonded along a bonding surface. The mating surface of the first housing 3112 and the second housing 3113 passes through the centerline Y2 of the grip 313 and the centerline Y1 of the energy storage device 150. During manufacturing of the fastener driver 300, the first housing 3112 and the second housing 3113 are aligned along the mating surface. This causes the centerline Y2 of the grip 313 and the centerline Y1 of the energy storage device 150 to be offset relative to the centerline Y1 of the energy storage device 150. This simplifies manufacturing, ensures precision, and reduces costs.

[0284] In some embodiments, the centerline Y4 of the coupling portion 314 is at least partially positioned on the side of the centerline Y1 of the energy storage device 150 that is away from the centerline Y3 of the motor 160. Thus, when the battery pack 115 is mounted on the coupling portion 314, the center of gravity G of the fastener driver 300 shifts to the left due to the heavy weight of the battery pack 115. The centerline Y2 of the grip portion 313, or the user's gripping position, is closer to the center of gravity G, making the fastener driver 300 more comfortable to use.

[0285] Because the direction of the first straight line 101 from which the fastener 10 is ejected substantially coincides with the centerline Y1 of the energy storage device 150, the grip portion 313 is typically at least partially positioned below the energy storage device 150, aligning the user's grip position with the position where the fastener 10 is ejected in the left-right direction. The energy storage device 150 includes a first cylinder 151. The centerline Y2 of the grip portion 313 is at least partially positioned between the centerline Y1 of the first cylinder 151 and the centerline Y3 of the motor 160. The first cylinder 151 accommodates at least a portion of the firing pin 131. The centerline Y2 of the grip portion 313 is at least partially positioned between the centerline Y1 of the firing pin 131 and the centerline Y3 of the motor 160. The centerlines Y1 of the energy storage device 150, the first cylinder 151, and the firing pin 131 substantially coincide. The centerline of the trigger 3131 is at least partially positioned between the centerline Y1 of the energy storage device 150 and the centerline Y3 of the motor 160. The center line of the trigger 3131 and the center line Y2 of the grip portion 313 substantially coincide with each other.

[0286] The centerline Y2 of the grip portion 313 and the centerline Y1 of the energy storage device 150 are substantially parallel. The distance L11a between the centerline Y2 of the grip portion 313 and the centerline Y1 of the energy storage device 150 is greater than or equal to 0.5 mm and less than or equal to 10 mm. In some embodiments, the distance L11a between the centerline Y2 of the grip portion 313 and the centerline Y1 of the energy storage device 150 is greater than or equal to 2 mm and less than or equal to 8 mm. In some embodiments, the distance L11a between the centerline Y2 of the grip portion 313 and the centerline Y1 of the energy storage device 150 is greater than or equal to 4 mm and less than or equal to 6 mm. The distance L11a between the centerline Y2 of the grip portion 313 and the centerline Y1 of the energy storage device 150 is small, and the user's grip position is relatively close to the position where the fastener 10 is ejected in the left-right direction, making it easier for the user to align the fastener 10 with the ejection position, and convenient use. The center line Y2 of the grip portion 313 is within 0.5 to 10 mm to the right of the center line Y1 of the energy storage device 150, balancing the user's needs for weight balance and shooting position alignment. The user feels that the fastener driver 300 is balanced in weight and is not easy to flip over, while also feeling that the shooting position is easy to align. The fastener driver 300 is comfortable and convenient to use, and the fastener driver 300 has an aesthetically pleasing appearance.

[0287] The ratio of the distance L11a between the center line Y1 of the energy storage device 150 and the center line Y2 of the grip portion 313 to the distance L11b between the center line Y1 of the energy storage device 150 and the center line Y3 of the motor 160 is less than or equal to 0.5. In some embodiments, the ratio of the distance L11a between the center line Y1 of the energy storage device 150 and the center line Y2 of the grip portion 313 to the distance L11b between the center line Y1 of the energy storage device 150 and the center line Y3 of the motor 160 is less than or equal to 0.4, 0.3, 0.2, or 0.1.

[0288] As shown in Figures 56 to 58 , the present application also provides another embodiment of a fastener driver 400. The structure of fastener driver 400 is substantially the same as that of fastener driver 100. Fastener driver 400 includes a magazine 420 and a guide assembly 480. Magazine 420 comprises an upper magazine 421, a lower magazine 422, and a guide rail 423. Guide rail 423 is configured to guide the movement of fasteners 10 within the magazine. Guide rail 423 is fixed to upper magazine 421. Upper magazine 421 is located in front of lower magazine 422. Upper magazine 421 includes a guide assembly fixing portion 424 and a guide rail fixing portion 425. The length of upper magazine 421 is defined by the top and bottom portions of upper magazine 421. Guide assembly fixing portion 424 is located at the top of upper magazine 421, while guide rail fixing portion 425 is located at the bottom of upper magazine 421. Upper magazine 421 is fixed to guide assembly 480 via guide assembly fixing portion 424. The guide assembly fixing portion 424 includes a hole through which a screw passes to fix the magazine to the guide assembly 480 .

[0289] The guide rail 423 is fixed to the upper magazine 421 via the guide rail fixing portion 425. Thus, because the upper magazine 421 is fixed to the guide assembly 480, the guide rail 423 is fixed to the upper magazine 421, and the guide rail 423 is fixed relative to the guide assembly 480. When the guide rail 423 guides the movement of the fastener 10, the position of the fastener 10 relative to the guide assembly 480 is stable and not easily shaken, thereby improving the nailing quality.

[0290] The guide rail fixing portion 425 includes a first strip-shaped hole 426. The shape of the first strip-shaped hole 426 matches that of the fastener 10, allowing the fastener 10 to pass through. The first strip-shaped hole 426 has a guide rail fixing end 4261. The guide rail fixing end 4261 matches the shape of the guide rail 423, allowing one end of the guide rail 423 to be inserted into the guide rail fixing end 4261. The upper magazine 421 includes a guide rail abutment portion 427. The other end of the guide rail 423 abuts against the guide rail abutment portion 427 and the guide assembly 480. This ensures that the guide rail 423 is stably fixed to the upper magazine 421, simplifying installation.

[0291] The lower magazine 422 is fixed to the upper magazine 421. The lower magazine 422 includes a second slot 428. The shape of the second slot 428 matches the shape of the fastener 10, allowing the fastener 10 to pass through. The guide rail 423 includes a mounting slot 429. The shape of the mounting slot 429 matches the shape of the tail end of the fastener 10 to guide the movement of the fastener 10. When loading the magazine 420 with the fastener 10, the fastener 10 first passes through the second slot 428, then through the first slot 426, and finally through the mounting slot 429. Once loaded into the magazine 420, the fastener 10 is not affected by the lower magazine 422. This allows for lower precision in the installation of the lower magazine 422 during manufacturing. Even if the lower magazine 422 becomes loose or misaligned with the upper magazine 421, it will not affect the movement of the fastener 10.

[0292] As shown in Figures 59 to 66, the present application also provides another embodiment of a fastener driver 500. The structure of fastener driver 500 is substantially the same as that of fastener driver 100. Fastener driver 500 includes a magazine 520, a firing pin 531, a fastener 50, and a guide assembly 580. The fastener 50 is U-shaped. The fastener 50 includes at least two legs 51 and a connecting portion 52 connecting the at least two legs 51. In this embodiment, the fastener 50 has two legs 51 and a connecting portion 52. The two legs 51 are the two straight sections of the U-shape, and the connecting portion 52 is the bent portion of the U-shape. The guide assembly 580 guides the fastener 50 into the workpiece. Due to the U-shape of the fastener 50, there is a gap between the at least two legs 51, which makes the fastener 50 easily deformed at the at least two legs 51 after contact with the workpiece.

[0293] As shown in Figures 60 to 63, the guide assembly 580 extends substantially along the first straight line 101. The guide assembly 580 includes a first guide structure 581. The first guide structure 581 prevents at least two legs 51 of the fastener 50 from approaching each other. When the fastener 50 contacts some workpieces, the two legs 51 of the fastener 50 are subjected to the force of the workpiece and move closer to each other under the action of the force. The shape of the fastener 50 changes, resulting in problems such as the fastener 50 not being able to be driven into the workpiece or the fastener 50 being skewed, resulting in poor work quality. The first guide structure 581 prevents at least two legs 51 of the fastener 50 from approaching each other, so that the at least two legs 51 of the fastener 50 do not shrink inward after contacting the workpiece, thereby improving work quality and efficiency.

[0294] The guide assembly 580 includes a second guide structure 582. The second guide structure 582 prevents the at least two legs 51 of the fastener 50 from moving away from each other. Depending on the workpiece material, when the fastener 50 contacts some workpieces, the two legs 51 of the fastener 50 may be subjected to the force of the workpiece and move away from each other. This can cause the shape of the fastener 50 to change, resulting in problems such as the fastener 50 not being able to penetrate the workpiece or the fastener 50 being skewed, leading to poor work quality. The second guide structure 582 prevents the at least two legs 51 of the fastener 50 from moving away from each other, preventing them from expanding outward after contact with the workpiece, thereby improving work quality and efficiency.

[0295] The guide assembly 580 includes a first guide structure 581 and a second guide structure 582 that prevent the shape of the fastener 50 from changing, preventing at least two legs 51 from shrinking inward or expanding outward when contacting a workpiece. When encountering different workpieces or different working conditions, the shape of the fastener 50 can remain unchanged, and the work quality and efficiency are high.

[0296] The guide assembly 580 includes a guide surface 583. After the fastener 50 moves to its uppermost position relative to the guide assembly 580, the guide surface 583 contacts the at least two legs 51. The guide surface 583 extends generally along the direction of the first straight line 101. When the striker 531 drives the fastener 50 to move, the upper sides of the at least two legs 51 abut against the guide surface 583 and move along the guide surface 583. The first guide structure 581 protrudes relative to the guide surface 583. When the fastener driver 500 is placed vertically, the first guide structure 581 protrudes downward relative to the guide surface 583. The first guide structure 581 is a strip-shaped rib that protrudes relative to the guide surface 583. The first guide structure 581 is located in the middle of the guide surface 583, and the direction in which the first guide structure 581 extends is consistent with the direction of the first straight line 101. The at least two legs 51 abut against the guide surface 583, sandwiching the first guide structure 581 between the at least two legs 51. The first guide structure 581 includes at least two first abutment surfaces 588. The at least two first abutment surfaces 588 are located on either side of the first guide structure 581, facing outward along its length. When the fastener 50 is subjected to an external force and the at least two legs 51 tend to retract inward, the at least two first abutment surfaces 588 respectively abut against the at least two legs 51, preventing the at least two legs 51 from moving toward each other.

[0297] The first guide structure 581 includes a slideway 586 located between at least two first abutment surfaces 588. Because there is a gap between at least two legs 51, at least two legs 51 can abut against the guide surface 583 when they move to their highest position. The connecting portion 52 is continuous in shape, so when the connecting portion 52 moves to its highest position, it abuts against the slideway 586 of the first guide structure 581. The slideway 586 extends along the first straight line 101. When the striker 531 drives the fastener 50, the upper side of the connecting portion 52 abuts against the slideway 586 and moves along it.

[0298] The second guide structure 582 protrudes relative to the guide surface 583. When the fastener driver 500 is placed vertically, the second guide structure 582 protrudes downward relative to the guide surface 583. The second guide structure 582 is two strip-shaped ribs protruding relative to the guide surface 583. The second guide structure 582 is located on both sides of the guide surface 583, and the extension direction of the second guide structure 582 is consistent with the direction of the first straight line 101. The second guide structure 582 includes at least two second abutment surfaces 589. The at least two second abutment surfaces 589 are located on both sides of the second guide structure 582 facing inward in the longitudinal direction. When the fastener 50 is subjected to external force and the at least two legs 51 tend to expand outward, the at least two second abutment surfaces 589 respectively abut against the at least two legs 51 and prevent the at least two legs 51 from moving away from each other.

[0299] The guide assembly 580 includes a first guide member 584 and a second guide member 585. The first guide member 584 and the second guide member 585 are arranged facing each other. At least a portion of the first guide member 584 is located above the second guide member 585. The first guide structure 581 and the second guide structure 582 are both disposed on the first guide member 584, resulting in a simple structure and easy processing. Both the first guide structure 581 and the second guide structure 582 protrude downward, making manufacturing easier and more cost-effective. At least a portion of the second guide member 585 supports the movement of the fastener 50. The first guide member 584 and the second guide member 585 are secured together by screws or other fastening means. A movable channel 587 is formed between the first guide member 584 and the second guide member 585. The movable channel 587 accommodates a portion of the striker 531 and the fastener 50. When the striker 531 pushes the fastener 50, at least a portion of the fastener 50 moves within the movable channel 587. When the fastener 50 moves, at least two legs 51 abut against the first guide structure 581. The upper side of the connecting portion 52 abuts against the first guide 584, and the lower side of the connecting portion 52 abuts against the second guide 585. The first guide 584 mainly guides the fastener 50, and the second guide 585 mainly supports the movement of the fastener 50. The structure is effective and simple.

[0300] As shown in Figure 64, the first guide structure 581 also guides the movement of the striker 531. The striker 531 includes a guide slot 532. The guide slot 532 extends in the direction of the first straight line 101. When the striker 531 moves, the guide slot 532 engages with at least a portion of the first guide structure 581. The first guide structure 581 cooperates with the guide slot 532 to guide the movement of the striker 531. In this way, the striker 531 with a longer length is less likely to shake, and the working quality of the fastener driver 500 is improved. In the front-to-back direction, the ratio of the length L12 of the guide slot 532 to the length L5 of the striker 531 is greater than or equal to 0.4 and less than or equal to 0.8. In some embodiments, the ratio of the length L12 of the guide slot 532 to the length L5 of the striker 531 is greater than or equal to 0.5 and less than or equal to 0.7. In some embodiments, the ratio of the length L12 of the guide slot 532 to the length L5 of the striker 531 is approximately 0.6. The length L12 of the guide groove 532 is longer than the length L5 of the striker 531. Thus, even when the striker 531 reaches a top dead center position farther from the guide assembly 580, a portion of the guide groove 532 engages with the first guide structure 581. Throughout the striker's movement, the striker 531 is guided by the guide assembly 580, which prevents it from shaking and improves the operating quality of the fastener driver 500.

[0301] As shown in FIG63 , after contact with the guide assembly 580, at least two legs 51 contact the guide surface 583, and the connecting portion 52 contacts the slide 586, resulting in a height difference between the at least two legs 51 and the connecting portion 52. The extension direction of the fastener 50 is inclined relative to the direction of the first straight line 101. The angle c at which the extension direction of the fastener 50 is inclined relative to the direction of the first straight line 101 is greater than or equal to 0 degrees and less than or equal to 8 degrees. In some embodiments, the angle c at which the extension direction of the fastener 50 is inclined relative to the direction of the first straight line 101 is greater than or equal to 1 degree and less than or equal to 7 degrees. In some embodiments, the angle c at which the extension direction of the fastener 50 is inclined relative to the direction of the first straight line 101 is greater than or equal to 2 degrees and less than or equal to 6 degrees. A small angle c at which the extension direction of the fastener 50 is inclined relative to the direction of the first straight line 101 does not affect the workpiece quality when the fastener 50 is injected into the workpiece.

[0302] As shown in Figures 65 and 66, the fastener driver 500 includes a lifting member 524. The second guide member 585 includes an input port 5851. The input port 5851 is connected to at least a portion of the magazine 520. The lifting member 524 uses elastic force to tightly align a row of fasteners 50 vertically within the magazine 520. The elastic force is generated by an elastic member, such as a spring or coil spring. The lifting member 524 is configured to move the fasteners 50 so that they pass through the input port 5851. After a fastener 50 is ejected, the fastener 50 is subjected to the force of the lifting member 524 and is lifted upward. The topmost fastener 50 in the row passes through the input port 5851 to await ejection by the firing pin 531. In this embodiment, the elastic member is a lifting spring 525. The upper end of the lifting spring 525 is fixedly connected to the guide assembly 580. The lower end of the lifting spring 525 is fixedly connected to the left side of the lifting member 524. When the user installs the fastener 50, he first overcomes the elastic force of the lifting spring 525 and moves the lifting member 524 downward. The lifting spring 525 deforms and becomes longer. After reserving enough space for a row of fasteners 50, the user lets go, and the lifting spring 525 drives the lifting member 524 to clamp the fasteners 50 in the magazine 520. The lower end of the lifting spring 525 is fixedly connected to the left side of the lifting member 524. In this way, the force on the left side of the lifting member 524 is greater than the force on the right side of the lifting member 524. The left side of the lifting member 524 is higher than the right side of the lifting member 524. The lifting member 524 is tilted relative to the direction of the first straight line 101, so that the extension direction of the fastener 50 is tilted relative to the direction of the first straight line 101. The angle at which the lifting member 524 is inclined relative to the first straight line 101 is consistent with the angle c at which the extending direction of the fastener 50 is inclined relative to the first straight line 101 .

[0303] As shown in FIG. 67 to FIG. 71 , the present application also provides a fastener driver 600 according to another embodiment.

[0304] As shown in Figures 67 and 68, the fastener driver 600 includes a housing 61, a striking assembly 62, a power mechanism 70, and a motor 64. The housing 61 is configured to support the striking assembly 62, the power mechanism 70, and the motor 64. The striking assembly 62 includes a striking member 621 for driving the fastener. Optionally, the striking member 621 is configured to drive the fastener into the working surface along a striking line 601. The striking member 621 is a sheet-like element extending along a plane parallel to the striking line 601, and the axis defined by the striking member 621 coincides with the striking line 601. The power mechanism 70 is configured to drive the striking member 621 to move along the striking line 601, thereby impacting the fastener and causing it to be shot into the working surface 200 along the striking line 601.

[0305] The power mechanism 70 includes a drive assembly 71, an energy storage assembly 72, and a firing assembly 73. The drive assembly 71 is configured to drive the energy storage assembly 72 to store energy. The firing assembly 73 forms or is connected to the striking member 621. The firing assembly 73 is configured to move relative to the housing 61 along the second straight line 602 and, when moving along the second straight line 602, drives the striking member 621 to move along the striking straight line 601. The energy storage assembly 72 stores energy for driving the firing assembly 73 and, when releasing the energy, drives the firing assembly 73 to move along the second straight line 602, thereby driving the striking member 621 to move along the striking straight line 601.

[0306] The energy storage assembly 72 includes a gas spring mechanism or a mechanical spring mechanism, wherein the mechanical spring mechanism utilizes a drive assembly to compress the helical elasticity, thereby causing the spring to store energy when compressed and release energy when extended. The spring drives the striking member to move when releasing energy.

[0307] As shown in Figures 67 to 69, in the present embodiment, the energy storage assembly 72 is, for example, a gas spring mechanism. The energy storage assembly 72 includes a cylinder 721, which also includes an air filling nozzle 724 configured to pre-fill the cylinder 721 with gas. The firing assembly 73 is at least partially disposed within the cylinder 721. The firing assembly 73 performs work on the gas within the cylinder 721, which pushes the firing assembly 73 to move, thereby driving the fasteners (e.g., nails, tacks, staples, etc.) held within the magazine 191 into the workpiece. The firing assembly 73 includes a piston 731, and the striking member 621 and the piston 731 are fixedly connected. The piston 731 is driven to reciprocate within the cylinder 721 in the direction of the second straight line 602. In the present embodiment, the second straight line 602 overlaps with the striking straight line 601. In certain embodiments, the second straight line 602 is parallel to the striking straight line 601 but does not overlap. In some embodiments, the second straight line 602 is arranged at a certain angle to the striking straight line 601 .

[0308] As shown in Figures 68 to 73, the drive assembly 71 includes a drive wheel 711, which is mounted on the output shaft 6511. During a striking cycle, the motor 64 rotates, driving the drive wheel 711, which in turn drives the striking member 621 from the bottom dead center, or striking position, to the top dead center, or rest position. The firing assembly 73 compresses the gas within the cylinder 721. As shown in Figure 6, when in the rest position, the firing assembly 73 and the drive wheel 711 are held in place. The compressed gas continuously pushes the firing assembly 73, or piston 731, causing it to accelerate. This continues until a trigger command is received, indicating that the user is starting to drive the nail, at which point the retaining force of the firing assembly 73 is released. As shown in Figure 5, after the retaining force is released, the gas compressed by the firing assembly 73 drives the firing assembly 73 and the striking member 621 to the striking position, thereby driving the nail into the workpiece.

[0309] In this embodiment, a striking cycle is defined as including a lifting cycle and a striking cycle. The lifting cycle is defined as starting when the rotation of the driving wheel 711 drives the striking member 621 to move toward the top dead center or the rest position, as shown in FIG5 . The striking cycle is defined as starting when the holding force is released and the gas compressed by the firing assembly 73 drives the firing assembly 73 and the striking member 621 to move toward the bottom dead center or the striking position.

[0310] In this embodiment, a wheel pin 712 is provided on the driving wheel 711, and a lifting tooth 622 engaged with the wheel pin 712 is provided on the striking member 621. The wheel pin 712 engages with the lifting tooth 622 to drive the striking member 621 to move. The lifting tooth 622 is configured as an engaging surface 6221 engaged with the wheel pin 712 and a non-engaging surface 6222 opposite to the engaging surface 6221. The wheel pin 712 engaged with the lifting tooth 622 at the beginning of a lifting cycle is defined as the first pin 712a, and the lifting tooth 622 closest to the first pin 712a at the beginning of the lifting cycle is defined as the target lifting tooth 622b. It should be explained that the lifting tooth 622 closest to the first pin 712a can be any lifting tooth 622 downstream of the first lifting tooth 622a engaged with the first pin 712a.

[0311] As shown in Figures 72 and 73, at the beginning of the lifting cycle, the outer envelope E of the rotational trajectory of the wheel pin 712 does not interfere with at least the non-meshing surface 6222 of the target lifting tooth 622b. The outer envelope E of the rotational trajectory of the wheel pin 712 is a curve that is tangent to every line of the rotational trajectory of the wheel pin 712 at least at one point. In the related art, due to some reasons, the striking member 621 may not fully move to the theoretical stop position. In this case, during the rotation of the drive wheel 711, the wheel pin, such as the first pin 712a, may collide with the downstream lifting tooth (e.g., the target lifting tooth 622b) of the meshing lifting tooth (e.g., the first lifting tooth 622a). In this embodiment, by rationally designing the shape of the lifting tooth 622, the wheel pin 712 on the drive wheel 711 is prevented from colliding with the lifting tooth 622 during the striking cycle, thereby ensuring the service life and operational safety of the fastener driver.

[0312] In this embodiment, the wheel pin 712 and the lifting tooth 622 are configured as mutually meshing protrusions and recesses. Optionally, the recess may be a groove, a blind hole, or a through hole structure.

[0313] As shown in Figures 68 and 69, the drive wheel 711 includes a first fixed layer 713 and a second fixed layer 714 arranged substantially in parallel. A plurality of wheel pins 712 are circumferentially arranged between the first fixed layer 713 and the second fixed layer 714. The first fixed layer 713 and the second fixed layer 714 are plates of a certain thickness. The plurality of wheel pins 712 are cylindrical, with the ends of the cylinders respectively disposed on the first fixed layer 713 and the second fixed layer 714. In some embodiments, the wheel pins 712 are movable or rotatable to reduce friction between the wheel pins 712 and the lifting teeth 622. In some embodiments, the wheel pins 712 are provided with movable or rotatable pin sleeves.

[0314] As shown in Figures 70 and 71, the striking member 621 is provided with a striking end 623 for striking the fastener and a fixed end 624 remote from the striking end 623. In this embodiment, the fixed end 624 is fixedly connected to the piston 731. It should be noted that the fixed connection between the fixed end 624 and the piston 731 means that a user or non-professional cannot disassemble the fixed end 624 and the piston 731 of the striking member 621 without using tools. Professionals can non-destructively disassemble the fixed end 624 and the piston 731 of the striking member 621 with the help of tools to facilitate maintenance. In this embodiment, the striking end 623 is located downstream of the fixed end 624, and a plurality of lifting teeth 622 are provided between the fixed end 624 and the striking end 623. The plurality of lifting teeth 622 are arranged on the striking member 621 along the length direction of the striking member 621. The plurality of lifting teeth 622 are protruding and have a wavy shape as a whole.

[0315] Exemplarily, the second lifting tooth 622 starting from the fixed end 624 is the target lifting tooth 622b. Exemplarily, the third lifting tooth 622 starting from the fixed end 624 is the target lifting tooth 622b (marked in the figure). In some embodiments, the lifting tooth 622 at the upstream end of the target lifting tooth 622b has the same tooth profile structure as the target lifting tooth 622b. In some embodiments, the lifting teeth 622 at the upstream and downstream ends of the target lifting tooth 622b have the same tooth profile structure as the target lifting tooth 622b. In some embodiments, the first lifting tooth 622a that should be engaged with the first pin 712a in theoretical design and normal operation of the machine is different from the tooth profile structure of the target lifting tooth 622b. In some embodiments, in the theoretical design and when the machine is working normally, when in the park position, the lifting tooth that engages with the wheel pin 712 when the firing assembly 73 and the drive wheel 711 are held in place is defined as a retaining lifting tooth 622c, and the tooth structure of the retaining lifting tooth 622c is different from that of the target lifting tooth 622b.

[0316] As shown in Figures 72 and 73, in this embodiment, the non-meshing surface 6222 of the lifting tooth is provided with a relief portion 6223 that is recessed toward the meshing surface 6221. The relief portion 6223 is generally arc-shaped and has a radius of curvature R'. The radius of curvature R' of the outer envelope E of the rotational trajectory of the wheel pin 712 is greater than or equal to the radius of curvature R of the outer envelope E of the rotational trajectory of the wheel pin 712. This reduces the risk of collision between the wheel pin 712 and the lifting tooth 622 during operation.

[0317] As shown in Figure 69, the driving wheel 711 rotates around the third straight line 603. In this embodiment, the third straight line 603 coincides with the motor axis 604, and the third straight line 603 intersects with the striking straight line 601. Exemplarily, the third straight line 603 is perpendicular to the striking straight line 601. A plurality of wheel pins 712 are distributed along the circumference of the driving wheel 711. Each wheel pin 712 on the driving wheel 711 is respectively engaged with the lifting teeth 622 on the striking member 621. As shown in Figure 70, during the lifting cycle, starting from the engagement of the first pin 712a with the first lifting tooth 622a, the wheel pins 712 arranged in sequence along the rotation direction are engaged with the corresponding lifting teeth 622 in sequence. When the wheel pin is engaged with the tooth 622c that keeps lifting (as shown in Figure 71), the striking member 621 and the piston 731 move to the parking position (top dead center).

[0318] The above shows and describes the basic principles, main features and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of this application.

Claims

1. A fastener driver comprising: a striking assembly including a piston and a striker, the striker being connected to the piston; A transmission mechanism, comprising a driving member configured to drive the striking assembly to move backward to a top dead center position; An energy storage device, configured to drive the striking assembly to move forward to a bottom dead center position to output striking force; The distance L3 between the top dead center position and the bottom dead center position is defined as the stroke of the striking assembly, the fastener driver is configured to drive the fastener movement within a preset length L4, and the ratio of the stroke of the striking assembly to the preset length is less than or equal to 1.

5.

2. The fastener driver of claim 1, wherein: The stroke is less than or equal to 80 mm.

3. The fastener driver of claim 1, wherein: The length of the striker is less than or equal to 165 mm.

4. The fastener driver of claim 1, wherein: The striker includes a toothed portion, and a ratio of a length of the toothed portion to the preset length is less than or equal to 1.

21.

5. The fastener driver of claim 1, wherein: The driving member drives the striker to move from the bottom dead center position, sequentially through the conversion position and the stop position to the top dead center position.

6. The fastener driver of claim 5, wherein: A ratio of a travel distance of the striker from the parking position to the top dead center position to a travel distance of the striker from the switching position to the top dead center position is less than 1.

7. The fastener driver of claim 5, wherein: The stroke distance of the striker from the conversion position to the top dead center position is greater than or equal to 3.7 mm and less than or equal to 4.8 mm.

8. The fastener driver of claim 5, wherein: The stroke distance of the striker from the stop position to the top dead center position is greater than or equal to 1.6 mm and less than or equal to 2.6 mm.

9. The fastener driver of claim 5, wherein: A ratio of a stroke distance of the striker from the parking position to the top dead center position to a stroke distance of the striker from the switching position to the top dead center position is greater than or equal to 0.5 and less than or equal to 0.

9.

10. The fastener driver of claim 5, wherein: The striker includes a main body extending along a first straight line direction and a plurality of meshing teeth arranged on the main body, the driving member includes a plurality of driving teeth arranged to engage with the striker to drive the striker, and the plurality of meshing teeth include a first meshing tooth that stops the striker at the stop position.

11. The fastener driver of claim 10, wherein: The first meshing tooth contacts the driving tooth at a contact point and generates a force perpendicular to the tangent of the contact point. When the striker moves from the conversion position to the top dead center position, the angle between the direction of the force and the direction of the first straight line gradually increases.

12. The fastener driver of claim 1, wherein: The fastener driver includes a guide assembly configured to guide movement of the fastener, wherein the length of the guide assembly is less than or equal to 108 mm.

13. The fastener driver of claim 1, wherein: The length of the fastener driver in the front-to-back direction is less than or equal to 295 mm.

14. The fastener driver of claim 1, wherein: The energy storage device includes a first cylinder that accommodates at least a portion of the piston, the first cylinder includes a first inner wall that contacts the piston, the first inner wall has a circular first cross-section, and the ratio of the stroke of the striker to the diameter of the first cross-section is greater than or equal to 1.7 and less than or equal to 2.

8.

15. The fastener driver of claim 14, wherein: The product of the first cross section and the stroke is defined as the gas displacement, and the ratio of the striking energy output by the fastener driver to the gas displacement is greater than or equal to 0.3 J / cm 3 And less than or equal to 0.7J / cm 3 .

16. A fastener driver comprising: a striking assembly including a piston and a striker, the striker being connected to the piston; A transmission mechanism, comprising a driving member configured to drive the striking assembly to move backward to a top dead center position; An energy storage device, configured to drive the striking assembly to move forward to a bottom dead center position to output striking force; Wherein, the length of the fastener driver in the front-to-back direction is less than or equal to 295 mm.

17. A fastener driver comprising: a striking assembly including a piston and a striker, the striker being connected to the piston; A transmission mechanism, comprising a driving member configured to drive the striking assembly to move backward to a top dead center position; an energy storage device, configured to drive the striking assembly to move forward to a bottom dead center position to output striking force, the energy storage device comprising a first cylinder accommodating at least a portion of the piston, the first cylinder comprising a first inner wall in contact with the piston, the first inner wall having a circular first cross section; The distance between the top dead center position and the bottom dead center position is defined as the stroke of the striking assembly, and the ratio of the stroke of the striker to the diameter of the first cross section is greater than or equal to 1.7 and less than or equal to 2.

8.

18. The fastener driver of claim 17, wherein: The energy storage device includes a second cylinder, at least a portion of the first cylinder is accommodated in the second cylinder, the second cylinder includes a second inner wall, the second inner wall has a circular second cross-section, and the ratio of the diameter of the first cross-section to the diameter of the second cross-section is greater than or equal to 0.6 and less than or equal to 0.

7.

19. The fastener driver of claim 17, wherein: A diameter of the first cross section is greater than or equal to 28 mm and less than or equal to 36 mm.

20. The fastener driver of claim 17, wherein: The product of the first cross section and the stroke is defined as the gas displacement, and the ratio of the striking energy output by the fastener driver to the gas displacement is greater than or equal to 0.3 J / cm 3 And less than or equal to 0.7J / cm3.

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