Nail shooting device

Abstract

The utility model discloses a shoot nail firing device, which relates to the technical field of shoot nail fastening, and comprises a main sleeve and a firing pin sleeve, a firing guide groove on the firing pin sleeve is arranged along the axis direction of the firing pin sleeve, and a brake pin groove is arranged on one side of the rear end of the firing pin sleeve and is communicated with the firing guide groove; a limiting hole is formed in the main sleeve, a reset side edge matched with the brake pin located in the brake pin groove is arranged on one side of the front end of the limiting hole, and an unlocking side edge matched with the brake pin located in the brake pin groove is arranged on one side of the rear end of the limiting hole. According to the utility model, the long-term stable and reliable use can be ensured on the basis of simplifying the structure, and the technical problems of shortened service life, reduced use safety, tedious manufacturing process, higher cost, complicated structure and high processing difficulty of the existing percussion part caused by a percussion pin spring are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of nail fastening, in particular to a nail firing device. Background Art

[0002] A nail shooter is a fastening tool that uses a firing pin to fire an integrated nail and uses the thrust generated by the explosion of the integrated nail to quickly drive the nail into the base. It has the advantages of being easy to carry, reliable fastening, and easy to construct. It has become an indispensable tool for carpentry and construction at this stage.

[0003] At present, nail shooters on the market are usually dominated by axial structures. For example, the patent document with the announcement number CN219806047U discloses an integrated nail fastener, which includes: an outer shell part for inserting an integrated nail; a handle part connected to the outer shell part and for human hand to hold, and relative displacement can occur between the handle part and the outer shell part; a firing part arranged in the outer shell part and used to fire the integrated nail, the firing part includes a firing sleeve and a firing pin and a hammer movably arranged on the inner side of the firing sleeve, one end of the firing sleeve penetrates into the inner side of the launch tube, and the other end thereof penetrates into the inner side of the outer sleeve; the firing pin is connected to the hammer, and the firing pin can pass through the firing sleeve to the launch tube, and a firing pin spring and a firing pin body are arranged radially inside the hammer, and the firing pin body partially passes through the hammer to the outside of the firing sleeve under the pressure of the firing pin spring. The firing pin of this type of nail shooter is arranged on the hammer through the firing pin spring. When in use, the restriction of the firing pin is released by the release block or the step structure to achieve the firing of the nail bullet. However, the firing part adopting this structure still has the following technical problems:

[0004] 1. Although the firing pin body and the firing pin spring can limit the hammer to ensure the safe use of the firing part, the firing pin spring will inevitably have unexpected factors such as material fatigue, deformation, brittle fracture, etc. that lead to weakening or failure of elastic force during long-term use. This not only shortens the service life of the firing part, but also affects the safety of the use of the nail shooter.

[0005] 2. The firing part needs to have limit holes on the outer sleeve and the hammer to facilitate the limiting by the limit pin. At the same time, the firing pin spring needs to be manufactured and assembled separately, which not only makes the manufacturing process of the firing part cumbersome and costly, but also makes the structure complicated.

[0006] 3. The firing part requires that the firing pin body and the hammer be in sliding fit, which requires that the outer diameter of the firing pin and the radial pin hole of the hammer be processed more precisely. If there is a slight deviation, the firing pin body will become stuck or unable to fire, so there is a technical problem of great processing difficulty.

[0007] Therefore, it is necessary to improve the existing firing unit to solve the above-mentioned technical problems. Utility Model Content

[0008] The utility model provides a nail shooting firing device. Compared with the prior art, the utility model eliminates the firing pin spring, can ensure long-term stable and reliable use on the basis of a simplified structure, and solves the technical problems of the prior firing part caused by the firing pin spring, such as shortened service life, reduced safety of use, complicated manufacturing process, high cost, complex structure and great processing difficulty.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0010] A nail firing device comprises a main sleeve and a firing pin sleeve, wherein the firing guide groove on the firing pin sleeve is arranged along the axial direction of the firing pin sleeve, and a brake pin groove is arranged on one side of the rear end thereof and the brake pin groove is connected with the firing guide groove; a limiting hole is arranged on the main sleeve, and a reset side matching the brake pin in the brake pin groove is arranged on the front end side of the limiting hole, and an unlocking side matching the brake pin in the brake pin groove is arranged on the rear end side of the limiting hole.

[0011] One end of the brake pin is arranged in the radial pin hole of the hammer, and the other end is located in the limiting hole after passing through the brake pin groove.

[0012] When the main sleeve is moved forward by external force, the brake pin slides from the brake pin groove into the firing guide groove under the action of the unlocking side, and releases the brake pin from locking the hammer, thus entering the firing state; when the main sleeve loses external force, the brake pin located in the firing guide groove is reset to the brake pin groove under the joint action of the reset side and the reset spring located between the main sleeve and the firing pin sleeve, and restores the brake pin from locking the hammer, thus entering the locked state.

[0013] The two ends of the unlocking side are respectively the unlocking starting point and the firing point. Under the action of the unlocking side, the brake pin releases the lock on the hammer by moving from the unlocking starting point to the firing point; the two ends of the reset side are respectively the reset starting point and the locking end point. Under the action of the reset side, the brake pin restores the lock on the hammer by moving from the reset starting point to the locking end point.

[0014] The limiting hole has a quadrilateral structure, and the reset side and the unlocking side are respectively obliquely arranged at the front end and the rear end of the limiting hole, and an upper side and a lower side are provided between the reset side and the unlocking side. The locking end point is formed by an arc transition between the reset side and the lower side, the unlocking starting point is formed by an arc transition between the lower side and the unlocking side, the firing point is formed by an arc transition between the unlocking side and the upper side, and the reset starting point is formed by an arc transition between the upper side and the reset side.

[0015] The upper side and the lower side are both arranged along the axial direction of the main sleeve, and the upper side and the lower side are parallel.

[0016] The width of the limiting hole is greater than or equal to the sum of the widths of the firing guide groove and the brake pin groove.

[0017] The firing guide groove and the brake pin groove are connected via an arc transition.

[0018] The firing pin sleeve is provided with an axial guide groove for radial positioning, and the main sleeve is provided with a positioning pin with an end extending into the axial guide groove.

[0019] The axial guide groove is located on the opposite side of the firing guide groove, and the positioning pin is located on the opposite side of the limiting hole.

[0020] The advantages of adopting the utility model are:

[0021] 1. The key innovation of the utility model is to control the brake pin by cooperating with the reset side and unlocking side provided at both ends of the limiting hole of the main sleeve and the brake pin groove provided on the firing pin sleeve to achieve the locking and unlocking of the hammer. Compared with the prior art, the utility model eliminates the firing pin spring. It only needs to place the brake pin in the radial pin hole of the hammer and the brake pin groove of the firing pin sleeve, and then use the limiting hole to cooperate. On the one hand, it can completely avoid the occurrence of unexpected factors such as the weakening or failure of the elastic force of the firing pin spring due to material fatigue, deformation, brittle fracture, etc. during long-term use, and effectively improve the safety, stability, reliability and service life of the firing device. On the other hand, since there is no need to produce and assemble the firing pin spring separately, it is also conducive to simplifying the structure and manufacturing process of the firing device and reducing the production cost. On the other hand, the brake pin does not need to slide in the radial pin hole, thereby reducing the processing difficulty of the brake pin and the radial pin hole.

[0022] In summary, the utility model can ensure long-term stable and reliable use on the basis of simplified structure, and has the technical effects of increasing service life, improving safety of use, simplifying manufacturing processes, reducing costs, simplifying structure and reducing processing difficulty.

[0023] 2. The limit hole of the utility model adopts a quadrilateral structure including a locking end point, an unlocking starting point, a firing point and a reset starting point. It has the advantages of simple structure, convenient and accurate control of the brake pin and effective locking and unlocking of the hammer, which further improves the stability and reliability of the firing device.

[0024] 3. The utility model sets the locking end point, unlocking starting point, firing point and reset starting point to be arc-shaped, which is convenient for manufacturing and accurate switching of the brake pin between various points.

[0025] 4. The utility model sets an arc-shaped transition between the firing guide groove and the brake pin groove, which is conducive to the brake pin sliding in or out between the firing guide groove and the brake pin groove in a balanced and stable manner, thereby ensuring the accuracy and reliability of firing.

[0026] 5. The utility model adopts an axial guide groove and a positioning pin installed on the main sleeve to achieve radial positioning of the firing pin sleeve, which has the advantages of simple structure and good positioning effect, and is conducive to simplifying the manufacturing process and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the planar assembly structure of the utility model;

[0028] Figure 2 for Figure 1 Schematic diagram of the axial cross-sectional structure;

[0029] Figure 3 for Figure 2 AA cross-sectional structural diagram;

[0030] Figure 4 for Figure 1 Schematic diagram of the planar device structure after flipping 90 degrees;

[0031] Figure 5 for Figure 1 A rear view structural diagram of ;

[0032] Figure 6 This is a schematic diagram of the three-dimensional assembly structure of the utility model (I);

[0033] Figure 7 This is a schematic diagram of the three-dimensional assembly structure of the utility model (II);

[0034] Figure 8 It is a schematic diagram of the planar assembly structure when the utility model is applied to a nail shooter;

[0035] Fig. 9 for Figure 8 Schematic diagram of the axial cross-sectional structure;

[0036] Fig.10 for Figure 8 Schematic diagram of the planar structure;

[0037] Fig.11 for Fig.10 Schematic diagram of the axial cross-sectional structure;

[0038] Fig.12 for Fig.11 Schematic diagram of CC cross-sectional structure;

[0039] Fig.13 for Figure 8 Schematic diagram of the three-dimensional structure;

[0040] Fig.14 It is a schematic diagram of the three-dimensional structure of the nail shooter in a natural state;

[0041] Fig.15 for Fig.14 DD cross-sectional structure diagram;

[0042] Fig.16 It is a schematic diagram of the three-dimensional structure of the nail shooter when it is in a compressed energy storage state;

[0043] Fig.17 for Fig.16 EE cross-sectional structure diagram;

[0044] Fig.18 It is a schematic diagram of the three-dimensional structure of the nail shooter when it is unlocked;

[0045] Fig.19 for Fig.18 FF cross-sectional structure diagram;

[0046] Fig. 20 It is a three-dimensional structural schematic diagram of the nail shooter in the firing position;

[0047] Fig.21 for Fig. 20 Schematic diagram of the GG cross-sectional structure;

[0048] Fig. 22 It is a three-dimensional structural schematic diagram of the nail shooter in a reset preparation state;

[0049] Fig.23 for Fig. 22 Schematic diagram of the HH cross-sectional structure.

[0050] Markings in the figure are: 1. main sleeve, 2. firing pin sleeve, 3. movable sleeve, 4. return spring, 5. firing pin, 6. hammer, 7. radial pin hole, 8. brake pin, 9. firing guide groove, 10. brake pin groove, 11. limit hole, 12. locking end point, 13. unlocking starting point, 14. firing point, 15. reset starting point, 16. upper side, 17. lower side, 18. reset side, 19. unlocking side, 20. axial guide groove, 21. positioning pin, 22. nail tube, 23. sound-absorbing and heat-insulating sleeve, 24. protective sleeve, 25. firing spring, 26. grip, 27. integrated nail. DETAILED DESCRIPTION

[0051] Example 1

[0052] like Figure 1-7As shown, a nail firing device comprises a main sleeve 1 and a firing pin sleeve 2, wherein the firing pin sleeve 2 is movably arranged inside the front half of the main sleeve 1, and a movable sleeve 3 is arranged at the front end of the main sleeve 1 through the firing pin sleeve 2, and a movable firing pin 5 and a hammer 6 are arranged inside the firing pin sleeve 2, and the firing pin 5 is mounted on the hammer 6, and the hammer 6 is provided with a radial pin hole 7 for mounting a brake pin 8. Among them, the structures and connection relationship of the above-mentioned main sleeve 1, firing pin sleeve 2, movable sleeve 3, return spring 4, firing pin 5 and hammer 6 are all existing conventional technologies, and the details can be referred to the references cited in the background technology, and no further description is given.

[0053] The key is to press Figure 1 In the direction shown, a firing guide groove 9 is provided on the firing pin sleeve 2, and the firing guide groove 9 is arranged along the axial direction of the firing pin sleeve 2. A brake pin groove 10 for locking the brake pin 8 is provided on one side of the rear end thereof, and the brake pin groove 10 is connected to the firing guide groove 9.

[0054] Furthermore, in order to facilitate the brake pin groove 10 to play a stable and reliable locking role on the brake pin 8, the axis of the brake pin groove 10 is preferably perpendicular to the axis of the firing guide groove 9. In order to facilitate the brake pin 8 to slide smoothly between the firing guide groove 9 and the brake pin groove 10, it is preferred that the firing guide groove 9 and the brake pin groove 10 have an arc transition.

[0055] In addition, a limiting hole 11 is provided on the wall of the rear half of the main sleeve 1. The limiting hole 11 corresponds to the firing guide groove 9 in the axial direction, and the width of the limiting hole 11 is greater than or equal to the sum of the widths of the firing guide groove 9 and the brake pin groove 10. One end of the brake pin 8 is arranged in the radial pin hole 7 of the hammer 6, and the other end is arranged in the limiting hole 11 after passing through the brake pin groove 10. A reset side edge 18 matching the brake pin 8 in the brake pin groove 10 is provided on one side of the front end of the limiting hole 11, and an unlocking side edge 19 matching the brake pin 8 in the brake pin groove 10 is provided on one side of the rear end of the limiting hole 11.

[0056] The brake pin 8 and the hammer 6 are rigidly connected. When the firing device is in a natural state, the brake pin 8 is locked in the brake pin groove 10 under the cooperation of the return spring 4 and the limiting hole 11, thereby playing the role of locking the hammer 6 by the brake pin 8.

[0057] In actual use, when the main sleeve 1 moves forward under the action of external force, the brake pin 8 slides from the brake pin groove 10 into the firing guide groove 9 under the action of the unlocking side 19, and releases the lock of the brake pin 8 on the hammer 6, and the firing device enters the firing state; when the main sleeve 1 loses the external force, the brake pin 8 located in the firing guide groove 9 is reset to the brake pin groove 10 under the joint action of the reset side 18 and the reset spring 4 located between the main sleeve 1 and the firing pin sleeve 2, and restores the lock of the brake pin 8 on the hammer 6, and the firing device enters the locked state.

[0058] It should be noted that the other end of the brake pin 8 passes through the brake pin slot 10 and is located in the limiting hole 11, which includes two structures: one is that the end face of the brake pin 8 extends out of the limiting hole 11, and the other is that the end face of the brake pin 8 is at the same height as the outer surface of the limiting hole 11 or is slightly lower than the outer surface of the limiting hole 11. Of course, in order to ensure a more accurate control effect, it is preferred that the end face of the brake pin 8 is at the same height as the outer surface of the limiting hole 11 or extends out of the limiting hole 11.

[0059] According to a preferred implementation of this embodiment, Figure 1 As shown, the limiting hole 11 is a quadrilateral structure, the reset side 18 and the unlocking side 19 are respectively arranged obliquely at the front end and the rear end of the limiting hole 11, and there is an upper side 16 and a lower side 17 between the reset side 18 and the unlocking side 19, and the two ends of the unlocking side 19 are respectively the unlocking starting point 13 and the firing point 14, and the two ends of the reset side 18 are respectively the reset starting point 15 and the locking end point 12. Specifically, the locking end point 12, the unlocking starting point 13, the firing point 14 and the reset starting point 15 are respectively located at the four corners of the limiting hole 11, and the locking end point 12 is formed by an arc transition between the reset side 18 and the lower side 17, the unlocking starting point 13 is formed by an arc transition between the lower side 17 and the unlocking side 19, the firing point 14 is formed by an arc transition between the unlocking side 19 and the upper side 16, and the reset starting point 15 is formed by an arc transition between the upper side 16 and the reset side 18. When the main sleeve 1 moves forward under the action of external force, the brake pin 8 releases the lock on the hammer 6 by moving from the unlocking starting point 13 to the firing point 14 under the action of the unlocking side 19; when the main sleeve 1 loses the external force, the brake pin 8 restores the lock on the hammer 6 by moving from the reset starting point 15 to the locking end point 12 under the action of the reset side 18.

[0060] Furthermore, the locking end point 12, the unlocking starting point 13, the firing point 14 and the reset starting point 15 are all arc-shaped, and the specific arc is preferably such that the brake pin 8 can be flexibly and accurately switched between the various points. The arc-shaped structures of the locking end point 12, the unlocking starting point 13, the firing point 14 and the reset starting point 15 can be directly cut when preparing the limiting hole 11.

[0061] The matching relationship between the limiting hole 11 and the brake pin 8 is further described in detail below:

[0062] When the main sleeve 1 is moved forward by an external force, the brake pin 8 located in the brake pin groove 10 of the firing pin sleeve 2 moves relatively backward, specifically, first moves from the locking end point 12 along the lower side 17 to the unlocking starting point 13, and then moves to the firing point 14 through the unlocking side 19. During the movement of the brake pin 8 from the locking end point 12 along the lower side 17 to the unlocking starting point 13, the firing device performs compression energy storage. During the movement of the brake pin 8 from the unlocking side 19 to the firing point 14, the brake pin 8 will slide from the brake pin groove 10 to the firing guide groove 9 under the action of the unlocking side 19, and the nail shooter continues to compress and store energy. When the brake pin 8 reaches the firing point 14, the brake pin 8 just slides out of the brake pin groove 10 and enters the rear end of the firing guide groove 9, and the firing device completes the compression energy storage, and at the same time releases the brake pin 8 from locking the hammer 6.

[0063] After the locking of the brake pin 8 and the hammer 6 is released, the hammer 6 will push the firing pin 5 to move forward rapidly under the thrust of the nail shooter firing spring 25 to detonate and fire the integrated nail 27. During the firing process, the brake pin 8 will enter the reset starting point 15 from the firing point 14 along the upper side 16.

[0064] After the firing is completed, the external force applied to the main sleeve 1 is removed. After the main sleeve 1 loses the external force, the brake pin 8 will move from the reset starting point 15 to the locking end point 12 under the joint action of the reset spring 4 and the reset side 18 (the reset spring 4 will be compressed when subjected to the external force). During this movement, the brake pin 8 will slide from the firing guide groove 9 to the brake pin groove 10. When the brake pin 8 reaches the locking end point 12, the brake pin 8 just slides out of the firing guide groove 9 and enters the brake pin groove 10, and the brake pin 8 is locked to the hammer 6 again.

[0065] It should be noted that the above-mentioned reset starting point 15 is also equivalent to the end point of firing, that is, when the brake pin 8 moves to the reset starting point 15 (or is about to reach the reset starting point 15), it indicates that the firing pin 5 is fired and the brake pin 8 will start to reset. However, in order to prevent the brake pin 8 from hitting the edge of the reset starting point 15 when the firing pin 5 is fired, it is preferred that there is a 1-5mm gap between the end point of firing and the reset starting point 15. Specifically, the gap between the end point of firing and the reset starting point 15 is 3mm.

[0066] According to another optional implementation of this embodiment, Figure 1 As shown, the upper side 16 and the lower side 17 are both arranged along the axial direction of the main sleeve 1, and the upper side 16 and the lower side 17 are parallel, so as to ensure effective control of the brake pin 8 on the basis of simplifying the structure of the limiting hole 11.

[0067] This embodiment also provides a nail shooting device using the above nail shooting device, such as Figure 8-13As shown, the nail shooter also includes a nail tube 22, a sound-absorbing and heat-insulating sleeve 23, a protective sleeve 24, a firing spring 25 and a grip 26. The nail tube 22 is fixed to the front end of the movable sleeve 3 through the sound-absorbing and heat-insulating sleeve 23, and the front end of the firing pin sleeve 2 extends into the nail tube 22. The grip 26 is fixed to the rear end of the main sleeve 1, and the protective sleeve 24 is fixedly sleeved on the rear section of the main sleeve 1 through the grip 26, and the limiting hole 11 is located in the protective sleeve 24. One end of the firing spring 25 is sleeved on the rear end of the hammer 6, and the other end abuts against the inside of the grip 26.

[0068] In order to ensure the stability and reliability of the firing pin sleeve 2 during axial movement, the present embodiment may adopt the existing conventional structure to limit its radial position, which will not be described in detail.

[0069] The above-mentioned nail shooter using the firing device of this embodiment is in a natural state. Fig.14 , 15 As shown, at this time, the brake pin 8 is located in the brake pin groove 10 and at the locking end point 12 of the limit hole 11, and the hammer 6 is locked by the brake pin 8 and cannot move. The specific working principle is as follows:

[0070] Step A: Compression Energy Storage

[0071] An integral nail 27 is installed in the nail tube 22. The integral nail 27 is usually a structure in which the nail and the nail bullet are fixed as one body, but a separate structure of nail and nail bullet can also be used. Then the nail tube 22 is pressed against the base, and the grip 26 is pushed forward, pressing the main sleeve 1 to move forward, compressing the reset spring 4 in the main sleeve 1 and the firing spring 25 between the hammer 6 and the grip 26, so that the brake pin 8 installed in the radial pin hole 7 of the hammer 6 moves from the locking point at one end of the reset side 18 on the main sleeve 1 to the unlocking starting point 13 at one end of the unlocking side 19 at the rear, and compresses and stores energy, so as to achieve the following effect: Fig.16 , 17 The compressed energy storage state is shown.

[0072] Step B: Unlock

[0073] Continue to press the main sleeve 1 forward, the firing pin sleeve 2 causes the brake pin 8 to move from the unlocking starting point 13 of the unlocking side 19 on the main sleeve 1 to the firing point 14 at the other end of the unlocking side 19 on the main sleeve 1. When the brake pin 8 reaches the firing point 14, the brake pin 8 slides out of the brake pin groove 10 on the firing pin sleeve 2 and enters the firing guide groove 9, completing the compression energy storage. At the same time, the brake pin 8 releases the lock of the hammer 6, and the result is as follows: Fig.18 , 19 Unlocked state shown.

[0074] Step C: Controlled Firing

[0075] Under the action of the firing spring 25, the hammer 6 drives the firing pin 5 to move forward, and at the same time, the brake pin 8 located in the firing guide groove 9 moves from the firing point 14 to the reset starting point 15 at the other end of the reset side 18 on the front main sleeve 1. When the brake pin 8 reaches or is about to reach the reset starting point 15, the tip of the firing pin 5 extends out of the firing pin sleeve 2 and enters the nail tube 22 to complete the firing of the integrated nail 27, achieving the following effect. Fig. 20 , 21 Shown is the fired state.

[0076] Step D: Reset the lock

[0077] Control the nail tube 22 to leave the substrate to achieve Fig. 22 , 23 In the reset state shown, under the joint action of the reset spring 4 and the reset side 18 in the main sleeve 1, the brake pin 8 located in the firing guide groove 9 moves from the reset starting point 15 to the locking point. When the brake pin 8 reaches the locking point, the brake pin 8 slides out of the firing guide groove 9 and enters the brake pin groove 10 to re-lock the hammer 6.

[0078] Step E: Repeat steps A, B, C, and D.

[0079] Example 2

[0080] This embodiment further optimizes the radial limiting structure of the firing pin sleeve 2 based on the embodiment 1.

[0081] like Figure 1-7 As shown, in this embodiment, a radial limiting structure is provided between the main sleeve 1 and the firing pin sleeve 2. The radial limiting structure includes an axial guide groove 20, a positioning hole and a positioning pin 21. The axial guide groove 20 is provided on the firing pin sleeve 2, the positioning hole is provided on the main sleeve 1, the positioning pin 21 is installed in the positioning hole, and the end of the positioning pin 21 extends into the axial guide groove 20 to play a role in radially limiting the firing pin sleeve 2.

[0082] Further, for the convenience of assembly, the axial guide groove 20 is preferably located at the other side opposite to the firing guide groove 9, and the positioning hole is located at the other side opposite to the limiting hole 11. Of course, according to actual needs, the axial guide groove 20 can also be set at any position relative to the firing guide groove 9, and correspondingly, the positioning hole can also be set at any position relative to the main sleeve 1. After adopting this radial limiting structure, not only the structure of the firing device is simple and easy to assemble, but also it has the advantage of good radial limiting effect.

[0083] The above description is only a specific implementation method of the present utility model. Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes; all disclosed features, or all methods or steps in the process, except for mutually exclusive features and / or steps, can be combined in any way.

Claims

1. A nail firing device, comprising a main sleeve (1) and a firing pin sleeve (2), characterized in that: The firing guide groove (9) on the firing pin sleeve (2) is arranged along the axial direction of the firing pin sleeve (2), and a brake pin groove (10) is arranged on the rear end side thereof and the brake pin groove (10) is connected with the firing guide groove (9); a limiting hole (11) is provided on the main sleeve (1), and a reset side edge (18) matching with the brake pin (8) located in the brake pin groove (10) is arranged on the front end side of the limiting hole (11), and an unlocking side edge (19) matching with the brake pin (8) located in the brake pin groove (10) is arranged on the rear end side of the limiting hole (11).

2. A nail firing device according to claim 1, characterized in that: One end of the brake pin (8) is arranged in the radial pin hole (7) of the hammer (6), and the other end passes through the brake pin groove (10) and is located in the limiting hole (11).

3. A nail firing device according to claim 1 or 2, characterized in that: When the main sleeve (1) moves forward under the action of an external force, the brake pin (8) slides from the brake pin groove (10) into the firing guide groove (9) under the action of the unlocking side (19), and releases the lock of the brake pin (8) on the hammer (6), entering the firing state; when the main sleeve (1) loses the external force, the brake pin (8) located in the firing guide groove (9) is reset to the brake pin groove (10) under the joint action of the reset side (18) and the reset spring (4) located between the main sleeve (1) and the firing pin sleeve (2), and restores the lock of the brake pin (8) on the hammer (6), entering the locked state.

4. A nail firing device according to claim 3, characterized in that: The two ends of the unlocking side (19) are respectively an unlocking starting point (13) and a firing point (14); under the action of the unlocking side (19), the brake pin (8) releases the lock on the hammer (6) by moving from the unlocking starting point (13) to the firing point (14); the two ends of the reset side (18) are respectively a reset starting point (15) and a locking end point (12); under the action of the reset side (18), the brake pin (8) restores the lock on the hammer (6) by moving from the reset starting point (15) to the locking end point (12).

5. A nail firing device according to claim 4, characterized in that: The limiting hole (11) is in a quadrilateral structure, the reset side edge (18) and the unlocking side edge (19) are respectively arranged obliquely at the front end and the rear end of the limiting hole (11), an upper side edge (16) and a lower side edge (17) are provided between the reset side edge (18) and the unlocking side edge (19), and an arc-shaped transition is formed between the reset side edge (18) and the lower side edge (17) to form a locking end point (12), an arc-shaped transition is formed between the lower side edge (17) and the unlocking side edge (19) to form an unlocking starting point (13), an arc-shaped transition is formed between the unlocking side edge (19) and the upper side edge (16) to form a firing point (14), and an arc-shaped transition is formed between the upper side edge (16) and the reset side edge (18) to form a reset starting point (15).

6. A nail firing device according to claim 5, characterized in that: The upper side edge (16) and the lower side edge (17) are both arranged along the axial direction of the main sleeve (1), and the upper side edge (16) and the lower side edge (17) are parallel.

7. A nail firing device according to claim 1, characterized in that: The width of the limiting hole (11) is greater than or equal to the sum of the widths of the firing guide groove (9) and the brake pin groove (10).

8. The nail firing device according to claim 1, characterized in that: The firing guide groove (9) and the brake pin groove (10) are connected via an arc transition.

9. A nail firing device according to any one of claims 1-2 and 4-8, characterized in that: The firing pin sleeve (2) is provided with an axial guide groove (20) for radial positioning, and the main sleeve (1) is provided with a positioning pin (21) whose end extends into the axial guide groove (20).

10. A nail firing device according to claim 9, characterized in that: The axial guide groove (20) is located on the opposite side of the firing guide groove (9), and the positioning pin (21) is located on the opposite side of the limiting hole (11).

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