Handle sleeve assembly for nail shooting device and nail shooting device

Abstract

The handle sleeve assembly comprises a middle sleeve and a rear sleeve, the front end of the rear sleeve is arranged at the rear end of the middle sleeve in a sleeved mode, and the rear sleeve can slide front and back and be positioned relative to the middle sleeve; the nail shooting device comprises a handle sleeve assembly, a percussion bolt, a locking mechanism and an unlocking ejection mechanism. The percussion bolt in the nail shooting device and components connected with the percussion bolt can be directly taken out from the rear portion of the middle casing pipe, meanwhile, the middle casing pipe and the rear casing pipe are connected in a sleeved mode, connection and disassembly can be rapidly achieved, and then the maintenance efficiency of the nail shooting device can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nail gun processing and manufacturing, in particular to a grip assembly for a nail gun and a nail gun. Background Art

[0002] A nail gun is a nail shooting tool powered by gunpowder. Since the nail cartridge in the integrated nail contains explosive gunpowder, after the gunpowder explodes at the front end of the nail gun, the steel nail is directly shot out, so that components to be fixed, such as doors and windows, insulation boards, sound insulation layers, decorations, pipelines, steel parts, wood products, etc. can be firmly connected to the base body.

[0003] The applicant filed an application for a utility model patent named: an internal push type firing mechanism for a nail gun and a new type of protective nail gun on February 26, 2024. The application number of this utility model patent is: 2024203538053. During the trial production and experiment of the actual product according to the technical solution of the above-mentioned utility model, the applicant found that although the effective blockage of impurities is achieved by using the tapered transition part on the firing bolt, the service life of the nail gun and the number of repairs or maintenance are extended. However, when it is necessary to perform maintenance or repair on the nail gun, the tapered transition part is provided at the front of the firing bolt, resulting in the firing bolt being unable to be taken out from the rear of the second inner sleeve, and it can only be taken out from its front. Taking out the firing bolt from the front requires removing all the components in front of the firing bolt, and taking out the components at the rear of the firing bolt requires removing the rear pressing sleeve. This leads to the need to disassemble the entire component when performing maintenance or replacement of the internal components of the nail gun, and then the maintenance and repair of the nail gun are more cumbersome. In some cases, due to the cumbersome maintenance or repair of the nail gun, some staff directly choose to discard it, resulting in waste of resources. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a grip assembly for a nail gun and a nail gun. The firing bolt and the components connected to the firing bolt in the nail gun can be directly taken out from the rear of the middle sleeve. At the same time, the middle sleeve and the rear sleeve are connected in a sleeved manner, and their connection and disassembly can be quickly realized, thus greatly improving the maintenance and repair efficiency of the nail gun.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a grip assembly for a nail gun, including a middle sleeve and a rear sleeve. The front end of the rear sleeve is sleeved on the rear end of the middle sleeve in a sleeved manner, and the rear sleeve can slide back and forth and be positioned relative to the middle sleeve.

[0006] Preferably, at least one set of chute groups is arranged on the outer side wall of the rear end of the middle casing. The chute group includes a socket guiding groove and a sliding guiding limiting groove. Both the socket guiding groove and the sliding guiding limiting groove are distributed along the axial direction of the middle casing. The front end and the rear end of the sliding guiding limiting groove are in a closed state. The rear end of the socket guiding groove communicates with the outside. The front end of the socket guiding groove communicates with a position in front of the rear end of the sliding guiding limiting groove. A semi-circular protrusion is arranged on the inner side wall of the front end of the rear casing. The semi-circular protrusion can be clamped into the sliding guiding limiting groove through the guiding of the socket guiding groove. The semi-circular protrusion can slide back and forth in the sliding guiding limiting groove and can be positioned at the front end or the rear end of the sliding guiding limiting groove.

[0007] Further, two sets of the chute groups are arranged on the outer side wall of the rear end of the middle casing, and the two sets of the chute groups are equally spaced along the circumferential direction of the middle casing.

[0008] Further, a first limiting step is arranged at a position close to the rear in the middle casing.

[0009] Further, a positioning sink is arranged at the front end inside the middle casing, and an inner snap ring installation groove is arranged on the inner side wall of the positioning sink.

[0010] A nail gun, comprising a grip assembly for a nail gun as described above, the nail gun further comprising a firing and locking assembly, the firing and locking assembly including a firing bolt, a locking mechanism, and an unlocking and ejecting mechanism. The firing bolt is slidably sleeved in the middle sleeve. The locking mechanism includes a locking block and a locking spring. A strip-shaped groove extending forward is provided at the rear end of the firing bolt. The lower part of the front end of the strip-shaped groove communicates with the outside. A guiding groove is provided at the rear end of the strip-shaped groove. The middle part of the locking block is hingedly arranged in the strip-shaped groove. The locking spring is clamped between the upper side wall of the strip-shaped groove and the upper part of the front end of the locking block. The locking spring is used to push the front end of the locking block to swing downward. A first convex block is provided at the upper part of the rear end of the locking block, and a first groove is provided on the front side of the first convex block. The unlocking and ejecting mechanism includes an unlocking shaft, a T-shaped connecting rod, a pressing sleeve, and a firing spring. A second convex block is provided at the lower part of the front end of the unlocking shaft, and a second groove is provided on the rear side of the second convex block. The front end of the unlocking shaft is sleeved in the guiding groove, and the second convex block is buckled in the first groove, and the first convex block is buckled in the second groove. The forward movement of the unlocking shaft can cause the rear end of the locking block to swing downward. The locking spring can push the front end of the locking block to swing downward and abut against the rear side of the first limiting step. The forward movement of the unlocking shaft to push the rear end of the locking block to swing downward can make the height of the front lower end of the locking block higher than the inner side wall height of the first limiting step. During the up-and-down swinging process of the front end of the locking block, the first convex block is always located in the second groove. The straight rod end of the T-shaped connecting rod is connected to the front end of the unlocking shaft. The pressing sleeve is slidably sleeved on the rear end of the T-shaped connecting rod, and the rear end of the pressing sleeve is fixedly connected to the inner rear side of the rear sleeve. The firing spring is sleeved outside the T-shaped connecting rod and the pressing sleeve, and the firing spring is clamped between the rear end of the firing bolt and the inner rear side of the rear sleeve.

[0011] Further, a second limiting step is provided at a position close to the inner rear side of the rear sleeve. A return spring is clamped between the rear end of the middle sleeve and the second limiting step, and the return spring is sleeved outside the firing spring.

[0012] Further, a firing pin guiding seat is installed in the positioning sunk groove, and an inner circlip for positioning the firing pin guiding seat in the positioning sunk groove is provided in the inner circlip installation annular groove.

[0013] Further, a firing pin is provided at the front part of the firing bolt, and the front part of the firing pin is sleeved in the firing pin guiding seat.

[0014] The beneficial effects of the present utility model are as follows: The structure of the present utility model is simple and convenient for processing and manufacturing; the semi-circular protrusion can be slid out and slid into the sliding guiding and limiting groove by using the socket guiding groove, so as to quickly realize the quick docking and disassembly of the middle sleeve and the rear sleeve. After quickly disassembling the rear sleeve and the middle sleeve, the firing bolt and the components connected to the firing bolt can be directly taken out from the rear part of the middle sleeve, and then it is convenient to carry out subsequent component repair and maintenance, greatly improving the repair and maintenance efficiency and convenience of the nail gun; further, the firing pin guiding seat is directly clamped and fixed in the positioning sinking groove by an internal circlip, and its installation operation is convenient. At the same time, during the frequent use of the nail gun, the firing pin guiding seat will not loosen, and then the use stability of the nail gun can be improved; in practical applications, by using the pushing action of the return spring on the rear sleeve, after the firing action is completed, the rear sleeve can smoothly return to the initial position, and then it is convenient to realize the reset of the firing bolt, so as to facilitate the next firing action of the nail gun. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some preferred embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the nail gun of the present utility model;

[0017] Figure 2 It is a schematic diagram of the distribution of the chute group on the outer side wall of the middle sleeve;

[0018] Figure 3 It is a partial longitudinal sectional view after the middle sleeve and the rear sleeve are sleeved;

[0019] Figure 4 It is a partial longitudinal sectional view of the front end of the nail gun;

[0020] Figure 5 It is a partial longitudinal sectional view of the rear end of the nail gun;

[0021] In the figure: 1 intermediate casing, 11 sliding guiding and limiting groove, 12 socket guiding groove, 13 first limiting step, 14 positioning sink, 15 internal snap ring mounting groove, 2 rear casing, 21 semi-circular protrusion, 22 second limiting step, 3 firing bolt, 31 strip groove, 32 guiding groove, 41 locking block, 411 first protrusion, 412 first groove, 42 locking spring, 51 unlocking shaft, 511 second protrusion, 512 second groove, 52 T-shaped connecting rod, 53 pressing sleeve, 54 firing spring, 6 return spring, 7 firing pin guiding seat, 8 firing pin, 9 front casing. Specific embodiments

[0022] The following will combine specific embodiments and the attached Figures 1-5 , and clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some preferred embodiments of the present invention, rather than all embodiments. Those skilled in the art can make similar deformations without violating the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0023] The present invention provides a grip assembly for a nail gun (such as Figure 1As shown in the figure, it includes an intermediate sleeve 1 and a rear sleeve 2. Both the intermediate sleeve 1 and the rear sleeve 2 are tubular structures that penetrate through from front to back. In actual applications, tubular profiles can be directly used for further processing and forming. The front end of the rear sleeve 2 is sleeved on the rear end of the intermediate sleeve 1 in a socketing manner, and the rear sleeve 2 can slide back and forth and be positioned relative to the intermediate sleeve 1. In actual applications, to facilitate the relatively stable back-and-forth sliding movement between the intermediate sleeve 1 and the rear sleeve 2, the inner side wall of the rear sleeve 2 can be made to fit the outer side wall of the intermediate sleeve 1. The specific implementation of the socketing, sliding, and positioning of the rear sleeve 2 and the intermediate sleeve 1 is as follows: At least one set of chute groups is provided on the outer side wall of the rear end of the intermediate sleeve 1. The chute group includes a socketing guiding groove 12 and a sliding guiding limiting groove 11. The cross-sections of both the socketing guiding groove 12 and the sliding guiding limiting groove 11 are semi-circular structures. Both the socketing guiding groove 12 and the sliding guiding limiting groove 11 are distributed along the axial direction of the intermediate sleeve 11. The socketing guiding groove 12 is L-shaped, and the sliding guiding limiting groove 11 is linear. The front end and the rear end of the sliding guiding limiting groove 11 are in a closed state. The rear end of the socketing guiding groove 12 communicates with the outside, and the front end of the socketing guiding groove 12 communicates with a position in front of the rear end of the sliding guiding limiting groove 11. A semi-circular protrusion 21 is provided on the inner side wall of the front end of the rear sleeve 2. The semi-circular protrusion 21 can be inserted into the sliding guiding limiting groove 11 through the guiding of the socketing guiding groove 12. The semi-circular protrusion 21 can slide back and forth in the sliding guiding limiting groove 11 and can be positioned at the front end or the rear end of the sliding guiding limiting groove 11. To facilitate the stable docking and back-and-forth sliding movement between the intermediate sleeve 1 and the rear sleeve 2, here, the outer side wall of the semi-circular protrusion 21 can be made to fit the outer side walls of the socketing guiding groove 12 and the sliding guiding limiting groove 11. When docking the intermediate sleeve 1 and the rear sleeve 2, align the semi-circular protrusion 21 with the rear port of the socketing guiding groove 12 front and back. Then, push the rear sleeve 2 along the axis of the intermediate sleeve 1. As the rear sleeve 2 is continuously pushed, the semi-circular protrusion 21 is inserted into the socketing guiding groove 12. After the semi-circular protrusion 21 slides to the corner of the socketing guiding groove 12, stop pushing the rear sleeve 2. Then, rotate the rear sleeve 2 clockwise so that the semi-circular protrusion 21 enters the sliding guiding limiting groove 11. After the semi-circular protrusion 21 enters the sliding guiding limiting groove 11, by pushing the rear sleeve 2, the rear sleeve 2 realizes stable back-and-forth sliding under the cooperation of the semi-circular protrusion 21 and the sliding guiding limiting groove 11. When the semi-circular protrusion 21 moves to the front end of the sliding guiding limiting groove 11, the forward movement positioning of the rear sleeve 2 on the intermediate sleeve 1 is realized by the blocking of the sliding guiding limiting groove 11 on the semi-circular protrusion 21. When the semi-circular protrusion 21 moves to the rear end of the sliding guiding limiting groove 11, the blocking of the sliding guiding limiting groove 11 on the semi-circular protrusion 21,After the rear sleeve 2 is rearwardly positioned on the middle sleeve 1 and it is necessary to disassemble the rear sleeve 2 and the middle sleeve 1, the semi-circular protrusion 21 is moved to the through intersection of the socket guiding groove 12 and the sliding guiding limiting groove 11. Then, the rear sleeve 2 is rotated counterclockwise so that the semi-circular protrusion 21 enters the socket guiding groove 12. When the semi-circular protrusion 21 reaches the corner of the socket guiding groove 12, the rear sleeve 2 is pulled backward, thus realizing the disassembly and separation of the rear sleeve 2 and the middle sleeve 1. In practical applications, to further improve the forward and backward sliding stability of the middle sleeve 1 and the rear sleeve 2, two sets of chute groups are provided on the rear side wall of the middle sleeve 1. The two sets of chute groups are equidistantly distributed along the circumferential direction of the middle sleeve 1. By using the guiding and sliding and limiting of the rear sleeve 2 by the two semi-circular protrusions 21, the sliding stability of the rear sleeve 2 is improved.

[0024] On the basis of the above embodiments, to facilitate the middle sleeve 1 to limit the firing bolt in the nail gun assembly, a first limiting step 13 is provided at a position near the rear inside the middle sleeve 2. Further, in practical applications, to facilitate the installation and fixation of the firing pin guiding seat of the nail gun at the front end of the middle sleeve 1, a positioning sink 14 is provided at the front end inside the middle sleeve 2. An inner snap ring installation annular groove 15 is provided on the inner side wall of the positioning sink 14. Specifically, a firing pin guiding seat 7 is installed in the positioning sink 14, and an inner snap ring for positioning the firing pin guiding seat 7 in the positioning sink 14 is provided in the inner snap ring installation annular groove 15.

[0025] The present utility model also provides a nail shooter, which includes a grip assembly for a nail shooter described above. The nail shooter further includes a firing and locking assembly. The firing and locking assembly includes a firing bolt 3, a locking mechanism, and an unlocking and ejecting mechanism. The firing bolt 3 is slidably sleeved in the middle sleeve 1. The firing bolt 3 can freely slide in the middle sleeve 1 and can be smoothly taken out from the front or rear of the middle sleeve 1. The locking mechanism includes a locking block 41 and a locking spring 42. A strip-shaped groove 31 extending forward is provided at the rear end of the firing bolt 3. The lower part of the front end of the strip-shaped groove 31 communicates with the outside. A guiding groove 32 is provided at the rear end of the strip-shaped groove 31. In this specific embodiment, the guiding groove 32 is a circular hole structure. The middle part of the locking block 41 is hingedly arranged in the strip-shaped groove 31. Specifically, a hinge shaft is arranged in the strip-shaped groove 31, and the hinge shaft penetrates through the middle part of the locking block 41, so as to realize the rotational movement of the locking block 41 in the strip-shaped groove 31 under the guidance of the strip-shaped groove 31. The locking spring 42 is clamped between the upper side wall of the strip-shaped groove 31 and the upper part of the front end of the locking block 41. Specifically, a sink groove is provided on the upper side wall of the strip-shaped groove 31 and the upper side wall of the left end of the locking block 41, and the upper and lower ends of the locking spring 42 are clamped in the corresponding sink grooves. The locking spring 42 is used to push the front end of the locking block 41 to swing downward. A first convex block 411 is provided on the upper part of the rear end of the locking block 41, and a first groove 412 is provided on the front side of the first convex block 411;The unlocking and ejecting mechanism includes an unlocking shaft 51, a T-shaped connecting rod 52, a pressing sleeve 53, and a firing spring 54. A second convex block 511 is provided at the lower part of the front end of the unlocking shaft 51, and a second groove 512 is provided at the rear side of the second convex block 511. The front end of the unlocking shaft 51 is sleeved in the guiding groove 32, and the second convex block 511 is buckled in the first groove 412, and the first convex block 411 is buckled in the second groove 512. When the unlocking shaft 51 moves forward, the rear end of the locking block 41 can swing downward. The locking spring 42 can push the front end of the locking block 41 to swing downward and abut against the rear side of the first limiting step 13. At this time, pushing the firing bolt 3 forward with force cannot achieve the forward movement of the firing bolt 3, which is equivalent to locking the firing bolt 3 in the middle sleeve 1. When the unlocking shaft 51 moves forward to push the rear end of the locking block 41 to swing downward, the height of the front lower end of the locking block 41 can be higher than the inner wall height of the first limiting step 13. At this time, pushing the firing bolt 3 forward with force can achieve the forward movement of the firing bolt 3, which is equivalent to unlocking the firing bolt 3 in the middle sleeve 1. During the up-and-down swinging process of the front end of the locking block 41, the first convex block 411 is always located in the second groove 512, and the first convex block 411 is always located in the second groove 512, which is equivalent to ensuring an effective hooking relationship between the first convex block 411 and the second convex block 511 all the time. Subsequently, it can be ensured that the left end of the unlocking shaft 51 will not slide out of the guiding groove 32, ensuring a stable cooperation relationship between the firing bolt 3 and the unlocking shaft 51 during the operation of the nail gun. The straight rod end of the T-shaped connecting rod 52 is connected to the front end of the unlocking shaft 51. The pressing sleeve 53 is slidably sleeved on the rear end of the T-shaped connecting rod 52, and the rear end of the pressing sleeve 53 is fixedly connected to the inner rear side of the rear sleeve 2. Specifically, an external thread is provided on the straight rod end of the T-shaped connecting rod 52, and a threaded hole is provided at the right end of the unlocking shaft 51. The straight rod end is tightened in the threaded hole to realize the fixed connection between the T-shaped connecting rod 52 and the unlocking shaft 51. The cross bar at the right end of the T-shaped connecting rod 52 is sleeved in the pressing sleeve 53. During the forward movement of the T-shaped connecting rod 52, when the rear cross bar of the T-shaped connecting rod 52 abuts against the inner front side wall of the pressing sleeve 53, the pressing sleeve 53 limits the forward movement of the T-shaped connecting rod 52. The firing spring 54 is sleeved outside the T-shaped connecting rod 52 and the pressing sleeve 53, and the firing spring 54 is clamped between the rear end of the firing bolt 3 and the inner rear side of the rear sleeve 2. By pressing the rear sleeve, the firing spring 54 can be compressed, and then the firing spring 54 applies a certain thrust to the firing bolt 3. As the firing spring 54 is further compressed, the pressing sleeve 53 will push the unlocking shaft 51. The forward movement of the unlocking shaft 51 realizes the limiting of the firing bolt 3 by the locking block 51, thereby realizing the ejection of the firing bolt 3 by the firing spring 54.;

[0026] On the basis of the above embodiments, the specific implementation manner in which the unlocking shaft 51 realizes the swinging of the locking block 41 is as follows: An arc surface is provided at the upper part of the rear end of the first convex block 411, and a guiding inclined surface with a front-high and rear-low shape opposite to the arc surface is provided at the lower part of the rear side of the second groove 512. As the guiding inclined surface continuously moves forward and comes into contact with the arc surface, after the contact, as the guiding inclined surface continues to move forward, the guiding inclined surface will press against the arc surface and swing downward, thereby realizing the upward swing of the front end of the locking block 41.

[0027] In practical applications, after the firing is completed, in order to facilitate the smooth reset of the rear sleeve 2, a second limiting step 22 is provided at a position close to the front of the inner rear side of the rear sleeve 2. A reset spring 6 is clamped between the rear end of the middle sleeve 1 and the second limiting step 22, and the reset spring 6 is sleeved outside the firing spring 54. During the firing process, the rear sleeve 2 moves forward to compress the reset spring 6. After the firing is completed, the middle sleeve 1 and the rear sleeve 2 slide to the initial relative position under the pushing action of the reset spring 6.

[0028] Generally, a nail gun uses a firing pin to fire the gunpowder at the rear part of an integrated nail. In this specific embodiment, a firing pin 8 is provided at the front part of the firing bolt 3, and the front part of the firing pin 8 is sleeved in the firing pin guide seat 7. In order to facilitate the installation of the integrated nail, a front sleeve 9 is sleeved at the front part of the middle sleeve 1, and the front end of the front sleeve 9 is used to install the integrated nail mounting seat.

[0029] In the present utility model, "upper", "lower", "front", "rear", "left", and "right" are all relative positions used for conveniently describing the positional relationship, and thus cannot be understood as absolute positions to limit the protection scope.

[0030] Except for the technical features described in the specification, they are all known technologies to those skilled in the art.

[0031] The above describes in detail the preferred embodiments and examples of the present utility model in conjunction with the drawings. However, the present utility model is not limited to the above embodiments and examples. For those of ordinary skill in the art in this technical field, without departing from the concept of the present utility model, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A grip assembly for a nail gun, comprising a middle sleeve and a rear sleeve, characterized in that, The front end of the rear sleeve is sleeved on the rear end of the middle sleeve in a socketing manner, and the rear sleeve can slide back and forth and be positioned relative to the middle sleeve; at least one set of chute groups is arranged on the outer side wall of the rear end of the middle sleeve, and each chute group includes a socketing guiding groove and a sliding guiding limiting groove. Both the socketing guiding groove and the sliding guiding limiting groove are distributed along the axial direction of the middle sleeve. The front end and the rear end of the sliding guiding limiting groove are in a closed state. The rear end of the socketing guiding groove communicates with the outside, and the front end of the socketing guiding groove communicates with a position in front of the rear end of the sliding guiding limiting groove. A semi-circular protrusion is arranged on the inner side wall of the front end of the rear sleeve. The semi-circular protrusion can be clamped into the sliding guiding limiting groove through the guiding of the socketing guiding groove, and the semi-circular protrusion can slide back and forth in the sliding guiding limiting groove and can be positioned at the front end or the rear end of the sliding guiding limiting groove.

2. The handle sleeve assembly for a nail gun according to claim 1, characterized in that, Two sets of the chute groups are arranged on the outer side wall of the rear end of the middle sleeve, and the two sets of chute groups are equidistantly distributed along the circumferential direction of the middle sleeve.

3. The handle sleeve assembly for a nail gun according to claim 1 or 2, characterized in that, A first limiting step is arranged at a position close to the rear in the middle sleeve.

4. The handle sleeve assembly for a nail gun according to claim 3, characterized in that, A positioning sink is arranged at the front end inside the middle sleeve, and an inner snap ring mounting groove is arranged on the inner side wall of the positioning sink.

5. A nail gun, characterized in that, A grip assembly for a nail gun according to claim 4, the nail gun further comprising a firing lock assembly, the firing lock assembly including a firing bolt, a locking mechanism, and an unlocking and ejecting mechanism. The firing bolt is slidably sleeved in the middle sleeve. The locking mechanism includes a locking block and a locking spring. A strip-shaped groove extending forward is provided at the rear end of the firing bolt. The lower front end of the strip-shaped groove communicates with the outside. A guiding groove is provided at the rear end of the strip-shaped groove. The middle of the locking block is hingedly arranged in the strip-shaped groove. The locking spring is clamped between the upper side wall of the strip-shaped groove and the upper front end of the locking block. The locking spring is used to push the front end of the locking block to swing downward. A first convex block is provided at the upper rear end of the locking block, and a first concave groove is provided on the front side of the first convex block. The unlocking and ejecting mechanism includes an unlocking shaft, a T-shaped connecting rod, a pressing sleeve, and a firing spring. A second convex block is provided at the lower front end of the unlocking shaft, and a second concave groove is provided on the rear side of the second convex block. The front end of the unlocking shaft is sleeved in the guiding groove, and the second convex block is buckled in the first concave groove, and the first convex block is buckled in the second concave groove. When the unlocking shaft moves forward, the rear end of the locking block can be swung downward. The locking spring can push the front end of the locking block to swing downward and abut against the rear side of the first limiting step. When the unlocking shaft moves forward to push the rear end of the locking block to swing downward, the height of the lower front end of the locking block can be higher than the inner wall height of the first limiting step. During the up-and-down swing of the front end of the locking block, the first convex block is always located in the second concave groove. The straight rod end of the T-shaped connecting rod is connected to the front end of the unlocking shaft. The pressing sleeve is slidably sleeved on the rear end of the T-shaped connecting rod, and the rear end of the pressing sleeve is fixedly connected to the inner rear side of the rear sleeve. The firing spring is sleeved outside the T-shaped connecting rod and the pressing sleeve, and the firing spring is clamped between the rear end of the firing bolt and the inner rear side of the rear sleeve.

6. A nail gun according to claim 5, characterized in that, in A second limiting step is provided at a position near the inner rear side of the rear sleeve. A return spring is clamped between the rear end of the middle sleeve and the second limiting step, and the return spring is sleeved outside the firing spring.

7. A nail gun according to claim 6, characterized in that, in A firing pin guiding seat is installed in the positioning sink. An inner circlip for positioning the firing pin guiding seat in the positioning sink is provided in the inner circlip installation annular groove.

8. A nail gun according to claim 7, characterized in that, A firing pin is provided at the front part of the firing bolt, and the front part of the firing pin is sleeved in the firing pin guiding seat.

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