Hand-held stapler

Abstract

The present disclosure relates to the technical field of stapler, and particularly relates to a hand-held stapler, which comprises a handle, a nail channel, a nail seat and a trigger, the handle has a first end and a second end; the nail channel has a first end and a second end, the first end of the nail channel is hinged with the handle through a first hinging shaft, the first hinging shaft is located between the first end and the second end of the handle, the second end of the nail channel has a nail outlet; one end of the nail seat is hinged with the nail channel through the first hinging shaft, the other end of the nail seat is provided with a lower nail groove, the lower nail groove is opposite to the nail outlet; the trigger can drive the nail seat to move towards the nail channel; in a set plane perpendicular to the first hinging shaft, the projection of the end point of the second end of the nail channel in the set plane is taken as a pole point, the projection of the axis of the nail channel in the set plane is taken as a polar axis, the direction from the second end to the first end of the nail channel is taken as the positive direction of the polar axis, and the polar angle of the projection of the end point of the second end of the handle in the set plane is less than 0 DEG.

Description

Technical Field

[0001] This disclosure relates to the field of stapler technology, and in particular to a handheld stapler. Background Technology

[0002] A handheld stapler is a type of stapler that does not need to be placed on a table and can be held and operated with one hand while suspended in the air. In daily use, in addition to traditional horizontal binding scenarios (the staple exit point points straight ahead), there are increasingly more scenarios involving diagonal or even vertical binding (the staple exit point points diagonally or directly downwards), such as sealing takeout bags or sealing fruit hanging on trees with paper protective bags. When using a regular handheld stapler to handle these diagonal or vertical binding scenarios, prolonged use can easily cause wrist fatigue. Utility Model Content

[0003] The purpose of this disclosure is to provide a handheld stapler to improve wrist comfort in oblique and even vertical binding scenarios.

[0004] For the purposes described above, this disclosure provides a handheld stapler, comprising: A grip having a first end and a second end; The nail track has a first end and a second end. The first end of the nail track is hinged to the handle via a first hinge axis located between the first end and the second end of the handle. The second end of the nail track has a nail outlet. A nail holder, one end of which is hinged to the nail track via a first hinge shaft, and the other end of which is provided with a lower nail groove opposite to the nail outlet; and A trigger that can move toward the grip to move the pin holder toward the pin track; Specifically, in a set plane perpendicular to the first hinge axis, the projection of the endpoint of the second end of the nail track in the set plane is the pole, the projection of the axis of the nail track in the set plane is the polar axis, the direction from the second end of the nail track to the first end is the positive direction of the polar axis, and the polar angle of the projection of the endpoint of the second end of the handle in the set plane relative to the polar axis is less than 0°.

[0005] In some embodiments of this disclosure, the position of the first hinge axis divides the grip into a first grip segment and a second grip segment, with a smooth transition between the first grip segment and the second grip segment.

[0006] In some embodiments of this disclosure, the angle between the extension direction of the nail track and the line connecting the first hinge shaft and the second end of the handle is an obtuse angle.

[0007] In some embodiments of this disclosure, the polar angle ranges from -25° to -15°.

[0008] In some embodiments of this disclosure, one end of the trigger is hinged to the grip via a second hinge axis, the second hinge axis being located between a first end of the grip and the first hinge axis; The pin holder is provided with a limiting part, and the trigger is provided with a limiting engagement part. The limiting engagement part cooperates with the limiting part to limit the maximum stroke of the trigger under no-load conditions.

[0009] In some embodiments of this disclosure, the limiting portion includes a pin, the limiting mating portion is a limiting hole, and the hole wall of the limiting hole includes a first hole wall, a second hole wall, and a third hole wall. The first hole wall is located on the side of the second hole wall away from the second hinge axis, and the third hole wall is connected between the first hole wall and the second hole wall, and the third hole wall is located on the side of the pin away from the first hinge axis. The pin passes through the limiting hole. In the free state, the pin abuts against the first hole wall. In the no-load condition and when the trigger is gripped, the pin abuts against the second hole wall. The third hole wall is configured to contact the pin when the trigger moves toward the grip, and drive the pin seat toward the pin track through the pin.

[0010] In some embodiments of this disclosure, a first stop and a second stop are also included. The first stop is connected to the grip, and the second stop is connected to the trigger. Under no-load conditions and when the trigger is gripped, the first stop can restrict the movement of the second stop so that there is a set safe distance between the grip and the trigger.

[0011] In some embodiments of this disclosure, one of the first stop portion and the second stop portion is a plug-in portion, and the other is a plug-in mating portion; the plug-in portion is provided with a socket; at least a portion of the plug-in mating portion can be inserted into the socket.

[0012] In some embodiments of this disclosure, the plug-in mating part is provided with a boss, which can abut against the end face of the plug-in part when the device is unloaded and the trigger is gripped.

[0013] In some embodiments of this disclosure, the surface of the grip away from the trigger is a convex curved surface.

[0014] In some embodiments of this disclosure, the surface of the grip away from the trigger is provided with a protective layer, and / or the surface of the trigger away from the grip is provided with a protective layer.

[0015] Through long-term observation, experimentation, and research, the inventors discovered that the main reason why conventional handheld staplers in existing technologies easily cause wrist fatigue during prolonged use in oblique or even vertical binding scenarios is that... (See also...) Figure 1 As shown, the existing grip 01 is generally parallel to the staple track 02 or at a certain angle along the staple track. This configuration forces the wrist to twist significantly relative to the forearm when binding diagonally or vertically, resulting in excessive ulnar deviation of the wrist.

[0016] The main beneficial effects of this disclosure are: The handheld stapler disclosed herein features a design where the projection of the second end of the handle onto the set plane has a polar angle of less than 0° relative to the polar axis. The handle's orientation, originating from the first hinge axis, tends to curve generally downwards from the second end, rather than extending along the staple path axis or curving upwards to the side of the staple path away from the trigger. This design allows the user to maintain a relatively natural wrist flexion angle even when the staple exit point is angled downwards, after holding the handle and trigger. This effectively reduces excessive ulnar deviation or unnatural twisting of the wrist caused by traditional upward-curving or flat handles, significantly improving comfort during long-term stapleping and reducing wrist fatigue. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this disclosure or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a handheld stapler in the prior art in a handheld state (the staple outlet is angled downwards). Figure 2 This is a structural diagram of the handheld stapler provided in the embodiment of the present disclosure in a handheld state (the staple outlet is angled downward). Figure 3 A top view of a handheld stapler provided in an embodiment of this disclosure in a free state; Figure 4 for Figure 3 A sectional view along line AA; Figure 5 A front view of a handheld stapler provided in an embodiment of this disclosure in a free state; Figure 6 A schematic diagram of the handheld stapler provided in the embodiment of this disclosure in a free state (partial cross-section of the handle to show the first hinge axis). Figure 7A schematic diagram of the handheld stapler provided in this embodiment of the present disclosure under no-load conditions and with the trigger in a gripped state; Figure 8 Another structural schematic diagram of the handheld stapler provided in the embodiments of this disclosure (in a free state); Figure 9 A schematic diagram of another structure of the handheld stapler provided in the embodiments of this disclosure from another perspective (in a free state). Figure 10 for Figure 8 The diagram shows a handheld stapler in an unloaded state with the trigger in a gripped position.

[0019] The annotations in the attached figures are explained as follows: 01. Grip; 02. Spike track; 04. Trigger; 10. Handle; 11. First handle section; 12. Second handle section; 20. Nail track; 21. Nail outlet; 30. Nail seat; 31. Lower nail groove; 32. Pin; 40. Trigger; 41. Connecting part; 411. Connecting plate; 4111. Limiting hole; 41111. First hole wall; 41112. Second hole wall; 41113. Third hole wall; 412. Bending section; 42. Hand grip; 50. First hinge shaft; 60. Second hinge shaft; 70. Nail clamping plate; 81. Insertion part; 811. Insertion hole; 82. Insertion mating part; 821. Rib plate; 8211. Boss; 90. Protective layer. Detailed Implementation

[0020] The technical solutions of this disclosure will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this disclosure, not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0021] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0023] See Figures 2 to 10 As shown, this embodiment of the present disclosure provides a handheld stapler, including a handle 10, staple path 20, staple holder 30, and trigger 40. The handle 10 has a first end and a second end; the staple path 20 has a first end and a second end, the first end of the staple path 20 is hinged to the handle 10 via a first hinge shaft 50, the first hinge shaft 50 being located between the first end and the second end of the handle 10, and the second end of the staple path 20 has a staple outlet 21; one end of the staple holder 30 is hinged to the staple path 20 via the first hinge shaft 50, and the other end of the staple holder 30 is provided with a lower staple groove 31. The lower nail slot 31 is opposite to the nail outlet 21; the trigger 40 can move towards the handle 10 to drive the nail seat 30 towards the nail path 20; wherein, in the setting plane perpendicular to the first hinge axis 50, the projection of the endpoint of the second end of the nail path 20 in the setting plane is the pole point, the projection of the axis of the nail path 20 in the setting plane is the polar axis, and the direction from the second end of the nail path 20 to the first end is the positive direction of the polar axis, and the polar angle of the projection of the endpoint of the second end of the handle 10 in the setting plane relative to the polar axis is less than 0°.

[0024] The handheld stapler provided in this embodiment has a generally downward curving trend from the first hinge axis 50 toward the second end of the handle 10, because the polar angle of the projection of the second end of the handle 10 onto the set plane is less than 0° relative to the polar axis. Instead, it extends along the axis of the staple path 20 or curves upward to the side of the staple path 20 away from the trigger 40. See [reference needed]. Figure 2 As shown, even with the bolt exit 21 angled downwards, the wrist can maintain a relatively natural bending angle after the user holds the grip 10 and trigger 40. This design effectively reduces excessive ulnar deviation of the wrist caused by traditional upturned or flat grips (such as...). Figure 1 This significantly improves comfort during long-term binding and reduces wrist fatigue, preventing unnatural twisting or distortion. Specifically, it combines... Figure 1 and Figure 2 It can be seen that, with the same inclination angle at the nail outlet 21, Figure 1 In existing handheld staplers, the angle between the little finger side of the hand and the forearm is close to 90°, which is significantly smaller than that of the handheld stapler. Figure 2The angle between the little finger side of the palm of the hand holding the handheld stapler provided in this embodiment of the present disclosure and the forearm (this angle is significantly greater than 90°).

[0025] Meanwhile, the downward curvature of the handle 10 makes the direction of the binding force line more closely match the natural downward pressing direction of the user's arm, enhancing the stability and directional accuracy of the operation.

[0026] In addition, compared to the upward-curving handle 10 design, this downward-curving trend helps maintain the compactness of the overall structure of the stapler, ensuring binding force while avoiding unnecessary space occupation, making it convenient for storage and carrying.

[0027] The handheld stapler provided in this embodiment offers a more ergonomic grip, improves binding efficiency, and provides users with a more comfortable and effortless user experience.

[0028] It should be understood that the second end of the pin track 20 has a pin outlet 21, and the end face of the second end is generally flat; the endpoint of the second end of the grip 10 refers to the farthest point of the second end that can contact the palm, for example, the endpoint is located on the surface of the grip 10 away from the trigger 40, and the vertical distance between the endpoint and the end face of the pin track 20 with the pin outlet 21 is the greatest.

[0029] In some embodiments, the setting plane is located on one side of the handheld stapler. In other embodiments, the setting plane may also intersect with the handheld stapler. For example, see... Figure 3 and Figure 4 As shown, the setting plane is a cross section along line AA. When the axis of the nail track 20 and the farthest point of the second end of the handle 10 are located in the setting plane, the polar axis Ox is the axis of the nail track 20 itself, and the projection of the endpoint of the second end of the handle 10 in the setting plane is the farthest point M of the second end of the handle 10 that can contact the palm. The polar angle θ of this farthest point relative to the polar axis is less than 0°.

[0030] In some embodiments, the polar angle θ ranges from -25° to -15°.

[0031] It should be noted that the polar angle θ can be, but is not limited to, -25°, -24°, -22°, -20°, -18°, -16°, or -15°.

[0032] In some embodiments, see Figure 6 As shown, the position of the first hinge shaft 50 divides the handle 10 into a first handle segment 11 and a second handle segment 12, with a smooth transition between the first handle segment 11 and the second handle segment 12.

[0033] In use, the user's palm primarily grips the second handle section 12, while the thumb typically rests on the first handle section 11. The handle 10 has a cavity, with a portion of the pin track 20 and pin seat 30 located within the cavity, and another portion of the pin track 20 and pin seat 30 located outside the cavity. For example, the length of the portion of the pin seat 30 located outside the cavity is greater than the length of the portion of the pin seat 30 located inside the cavity. This increases the distance between the second handle section 12 and the hand grip section in the free state, and prevents the hand grip 42 from overlapping with the handle 10 when gripped.

[0034] In some embodiments, see Figure 5 As shown, there is a smooth transition between the first grip section 11 and the second grip section 12, and the surface of the grip 10 away from the trigger 40 is a convex curved surface, which can increase grip comfort.

[0035] In some embodiments, see Figure 6 As shown, the angle α between the extension direction of the pin track 20 (indicated by the dashed line) and the line connecting the first hinge axis 50 and the second end of the handle 10 (indicated by the dashed line) is an obtuse angle. It should be understood that the extension direction of the projection of the axis of the pin track 20 onto the setting plane is consistent with the extension direction of the pin track 20. The line connecting the first hinge axis 50 and the second end of the handle 10 can be the line connecting the intersection of the axis of the first hinge axis 50 and the setting plane with the projection of the farthest point of the second end of the handle 10 onto the setting plane.

[0036] From the first hinge axis 50 toward the second end of the handle 10, the handle 10 has a tendency to bend toward the trigger 40. When the user holds the stapler to operate it, even if the staple outlet 21 is angled downward, for example when sealing a bag (such as a takeout bag), the wrist can still maintain a natural bending angle, which can reduce wrist fatigue during long-term use.

[0037] In some embodiments, see Figure 5 As shown, one end of the trigger 40 is hinged to the grip 10 via a second hinge shaft 60, which is located between the first end of the grip 10 and the first hinge shaft 50. The pin seat 30 is provided with a limiting part, and the trigger 40 is provided with a limiting engagement part. The limiting engagement part cooperates with the limiting part to limit the maximum stroke of the trigger 40 under no-load conditions. The maximum stroke of the trigger 40 under no-load conditions refers to the maximum angle of rotation of the trigger 40 around the second hinge shaft 60 when the trigger 40 moves from a free state to a gripped state under no-load conditions.

[0038] In some embodiments, see Figure 4 As shown, the trigger 40 includes a connecting part 41 and a grip part 42 that partially covers the outside of the connecting plate 411. The connecting part 41 can be made of metal, such as stainless steel; the grip part 42 can be made of plastic.

[0039] In some embodiments, see Figure 6 and Figure 7 As shown, the limiting part includes a pin 32, and the limiting fitting part is a limiting hole 4111. The hole wall of the limiting hole 4111 includes a first hole wall 41111, a second hole wall 41112, and a third hole wall 41113. The first hole wall 41111 is located on the side of the second hole wall 41112 away from the second hinge shaft 60. The third hole wall 41113 connects the first hole wall 41111 and the second hole wall 41112, and the third hole wall 41113 is located on the pin 32. On the side away from the first hinge axis 50, the pin 32 passes through the limiting hole 4111; in the free state, the pin 32 abuts against the first hole wall 41111; in the no-load condition and when the trigger 40 is gripped, the pin 32 abuts against the second hole wall 41112; the third hole wall 41113 is configured to contact the pin 32 when the trigger 40 moves toward the grip 10, and drive the pin seat 30 to move toward the pin track 20 through the pin 32.

[0040] For example, the connecting part 41 includes two connecting plates 411, which are located on both sides of the pin seat 30. The two connecting plates 411 are also located on both sides of the handle 10. A second hinge shaft 60 passes through the handle 10, and its two ends are riveted to the two connecting plates 411. The connecting plates 411 are rotatable relative to the handle 10 around the axis of the second hinge shaft 60. Both connecting plates 411 have bent sections 412, the distance between which is less than the width of the pin seat 30. In no-load operation and when the trigger 40 is gripped, the bent sections 412 abut against the pin seat 30. Both connecting plates 411 are provided with limiting holes 4111. Limiting portions are provided on both sides of the pin seat 30, i.e., pins 32 are provided on both sides of the pin seat 30. The pins 32 on the same side cooperate with the limiting holes 4111, and the pins 32 pass through the limiting holes 4111. The wall of the limiting hole 4111 also includes a third hole wall 41113. The first hole wall 41111 is located on the side of the second hole wall 41112 away from the second hinge axis 60. The third hole wall 41113 is connected between the first hole wall 41111 and the second hole wall 41112, and the third hole wall 41113 is located on the side of the pin 32 away from the first hinge axis 50. In the free state, the pin 32 abuts against the first hole wall 41111. In the no-load condition and when the trigger 40 is gripped, the pin 32 abuts against the second hole wall 41112. The third hole wall 41113 is configured to contact the pin 32 when the trigger 40 moves toward the grip 10, and drive the pin seat 30 to move toward the pin track 20 through the pin 32.

[0041] During the movement of the trigger 40 towards the grip 10 by driving the trigger 40 with a finger, the third hole wall 41113 can always be in contact with the pin 32 and apply a force to the pin 32. The pin 32 drives the pin seat 30 to rotate around the axis of the first hinge shaft 50 to move towards the pin track 20 until the pin 32 abuts against the second hole wall 41112.

[0042] It should be understood that, see Figure 5 and Figure 8 As shown, the handheld stapler also includes a staple pressing plate 70, which is connected to the first end of the handle 10. The staple pressing plate 70 is aligned with the staple outlet 21 and is used to press the staples located in the staple outlet 21 into the staple groove 31.

[0043] It should be noted that the structure of the stapler 70 and the working principle of the handheld stapler are things that those skilled in the art should be able to understand, and are well known and easy to implement for those skilled in the art. Therefore, this embodiment will not describe them in detail.

[0044] In some embodiments, see Figures 8 to 10 As shown, the handheld stapler also includes a first stop and a second stop. The first stop is connected to the handle 10, and the second stop is connected to the trigger 40. In an unloaded state and with the trigger 40 in a gripped position, the first stop restricts the movement of the second stop, ensuring a safe distance d1 between the handle 10 and the trigger 40 to reduce the risk of hand injury during use. For example, the second stop abuts against the first stop, thereby stopping the trigger 40 from moving.

[0045] In some embodiments, when the second stop portion abuts against the first stop portion, the pressure pin 70 abuts against the bottom of the lower nail groove 31, the pin 32 abuts against the second hole wall 41112, and the bent section 412 abuts against the nail seat 30.

[0046] During normal use, the item to be bound is placed between the lower staple slot 31 and the staple outlet 21. When gripped, the staple clamp 70 engages with the lower staple slot 31 to complete the binding. However, due to the presence of the item to be bound, the staple clamp 70 does not contact the bottom of the lower staple slot 31. Simultaneously, the pin 32 does not abut against the second hole wall 41112, and the bent section 412 does not abut against the staple holder 30. Therefore, the trigger 40 cannot reach its maximum stroke. The distance between the grip 42 and the handle 10 is greater than the set safety distance, thereby reducing the risk of pinching injuries.

[0047] In some embodiments, one of the first stop portion and the second stop portion is a plug-in portion 81, and the other is a plug-in mating portion 82; the plug-in portion 81 is provided with a socket 811; at least a portion of the plug-in mating portion 82 can be inserted into the socket 811.

[0048] The insertion and engagement between the insertion and engagement part 82 and the insertion part 81 can play a certain guiding role, which helps to prevent the grip 10 and the trigger 40 from being accidentally deformed by other external forces. The insertion and engagement part 82 can still engage with the insertion part 81 to maintain the set safe distance between the grip 10 and the trigger 40.

[0049] In some embodiments, see Figure 9 As shown, the first stop is a plug-in part 81, which is provided with a plug hole 811; the second stop is a plug-in mating part 82, at least a portion of which can be inserted into the plug hole 811.

[0050] In one specific embodiment, the insertion mating part 82 includes two cross-arranged stiffeners 821, for example, the two stiffeners 821 can be perpendicular.

[0051] In other embodiments, the insertion mating part 82 may also be a columnar structure.

[0052] It should be noted that the form of the plug-in mating part 82 is not limited to the above two. Other forms of plug-in mating parts 82 can be selected according to actual needs, as long as they can be inserted into the socket 811 to achieve the limiting function.

[0053] Of course, the mating part 82 can also be fully inserted into the socket 811.

[0054] In other embodiments, the first stop may be a plug-in mating part 82 and the second stop may be a plug-in part 81.

[0055] In some embodiments, the insertion mating part 82 is provided with a boss 8211, which can abut against the end face of the insertion part 81 when the no-load condition is underway and the trigger 40 is in the gripped state.

[0056] For example, see Figure 9 As shown, the stiffener 821 can be convex in shape to form a boss 8211.

[0057] In some embodiments, see Figure 5 and Figure 8 As shown, a protective layer 90 is provided on the surface of the handle 10 away from the hand grip 42, and a protective layer 90 is provided on the surface of the hand grip 42 away from the handle 10.

[0058] In some embodiments, the protective layer 90 can be made of an elastomeric material, such as thermoplastic elastomer (TPE), liquid silicone rubber, or vulcanized silicone rubber. Taking TPE as an example, TPE can be double-injected with the plastic grip portion 42 and handle 10. The softness of TPE can distribute pressure, reducing the impact of direct contact between the user's hand and the hard handle 10 or trigger 40, making the grip 10 and trigger 40 more comfortable to the touch, thus making prolonged holding and operation more comfortable and reducing hand fatigue.

[0059] At the same time, TPE has an excellent coefficient of friction, which allows it to maintain a high level of friction even when the palms are sweaty or in a wet environment, providing sufficient grip and enhancing operational stability.

[0060] Furthermore, TPE has a low thermal conductivity, making it an excellent heat insulation material. In summer, when temperatures are high, it effectively blocks ambient heat (such as from direct sunlight) from being conducted to the hand, keeping the grip 10 and trigger 40 at a relatively constant and comfortable temperature, preventing burns. In winter, when temperatures are low, it prevents heat from the hand from quickly dissipating to the cold metal or plastic, keeping it from feeling cold and enhancing the user experience.

[0061] Of course, the material of the protective layer 90 can also be other soft rubber materials with high coefficient of friction and low specific heat capacity.

[0062] In other embodiments, the protective layer 90 may be provided only on the surface of the handle 10 away from the grip portion 42, or only on the surface of the grip portion 42 away from the handle 10.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A handheld stapler, characterized in that, include: A grip having a first end and a second end; The nail track has a first end and a second end. The first end of the nail track is hinged to the handle via a first hinge axis located between the first end and the second end of the handle. The second end of the nail track has a nail outlet. The nail holder has one end hinged to the nail track via the first hinge shaft, and the other end of the nail holder is provided with a lower nail groove, which is opposite to the nail outlet. as well as A trigger that can move toward the grip to move the pin holder toward the pin track; Specifically, in a set plane perpendicular to the first hinge axis, the projection of the endpoint of the second end of the nail track in the set plane is the pole, the projection of the axis of the nail track in the set plane is the polar axis, the direction from the second end of the nail track to the first end is the positive direction of the polar axis, and the polar angle of the projection of the endpoint of the second end of the handle in the set plane relative to the polar axis is less than 0°.

2. The handheld stapler according to claim 1, characterized in that, The position of the first hinge axis divides the handle into a first handle segment and a second handle segment, with a smooth transition between the first handle segment and the second handle segment.

3. The handheld stapler according to claim 1, characterized in that, The angle between the extension direction of the nail track and the line connecting the first hinge shaft and the second end of the handle is an obtuse angle.

4. The handheld stapler according to claim 1, characterized in that, The polar angle range is -25° to -15°.

5. The handheld stapler according to claim 1, characterized in that, One end of the trigger is hinged to the grip via a second hinge axis, the second hinge axis being located between the first end of the grip and the first hinge axis; The pin holder is provided with a limiting part, and the trigger is provided with a limiting engagement part. The limiting engagement part cooperates with the limiting part to limit the maximum stroke of the trigger under no-load conditions.

6. The handheld stapler according to claim 5, characterized in that, The limiting part includes a pin, and the limiting mating part is a limiting hole. The wall of the limiting hole includes a first hole wall, a second hole wall, and a third hole wall. The first hole wall is located on the side of the second hole wall away from the second hinge axis. The third hole wall is connected between the first hole wall and the second hole wall, and the third hole wall is located on the side of the pin away from the first hinge axis. The pin passes through the limiting hole. In the free state, the pin abuts against the first hole wall. In the no-load condition and when the trigger is gripped, the pin abuts against the second hole wall. The third hole wall is configured to contact the pin when the trigger moves toward the grip, and drive the pin seat to move toward the pin track through the pin.

7. The handheld stapler according to claim 1, characterized in that, It also includes a first stop and a second stop. The first stop is connected to the grip and the second stop is connected to the trigger. In no-load conditions and when the trigger is gripped, the first stop can restrict the movement of the second stop so that there is a set safe distance between the grip and the trigger.

8. The handheld stapler according to claim 7, characterized in that, One of the first stop portion and the second stop portion is a plug-in portion, and the other is a plug-in mating portion; the plug-in portion is provided with a plug hole; at least a portion of the plug-in mating portion can be inserted into the plug hole.

9. The handheld stapler according to claim 8, characterized in that, The insertion mating part is provided with a boss, which can abut against the end face of the insertion part when the machine is unloaded and the trigger is gripped.

10. The handheld stapler according to claim 1, characterized in that, The surface of the grip away from the trigger is a convex curved surface.

11. The handheld stapler according to any one of claims 1 to 10, characterized in that, The surface of the grip away from the trigger is provided with a protective layer, and / or the surface of the trigger away from the grip is provided with a protective layer.

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