A pneumatic pressure discharge type nail gun

Abstract

The utility model discloses a kind of pneumatic pressure deslagging type nail gun, belong to handheld nail tool technical field, including heat insulation component, be located at the front end of nail gun, there is nail pipe with firing pipeline in, for accommodating and firing nail;Firing component is connected to the end of heat insulation component, there is firing pin that can be inserted into firing pipeline, for firing the bottom powder of nail;Deslagging passage is connected with external space, is formed in heat insulation component and firing component, inlet is connected with firing pipeline, outlet is at the tail of nail gun.Nail in firing pin impact firing pipeline, the gas pressure and powder residue generated are discharged through deslagging passage, realize powder residue real-time cleaning, eliminate the cumbersome step of traditional nail gun periodic disassembly and clean residue.The integrated design improves the continuous operation performance of nail gun, and brings efficient use experience for operator.

Description

Technical Field

[0001] This utility model relates to the field of handheld nailing tools, and more specifically, to a pneumatic slag-discharging nail gun. Background Technology

[0002] Traditional nail guns produce a large amount of high-temperature residue and gas when firing nails, due to the combustion of gunpowder at the base of the nail. Currently, the slag removal structure of nail guns on the market is relatively simple, often using a single axial vent for slag removal. This results in gunpowder residue accumulating in the gap between the inner ring of the cap and the outer ring of the nail tube. Periodically, the nail gun must be disassembled to clean the residue. Therefore, designing a system that can efficiently remove firing residue and improve the user experience has become a pressing technical problem in this field. Utility Model Content

[0003] To address the lack of efficient slag-discharging nail guns in existing technologies, this invention proposes a pneumatic slag-discharging nail gun, aiming to achieve rapid slag discharge by optimizing the slag discharge channel structure layout, thereby solving the technical problems existing in the prior art.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows: A pneumatic slag discharge type nail gun, including A heat-insulating component is located at the front end of the nail gun and has a nail tube with a firing channel inside, the channel being used to receive and fire the nail; A firing assembly is connected to the end of the heat insulation assembly and has a firing pin inside that can extend into the firing tube. The firing pin is used to fire the gunpowder at the bottom of the nail. And a slag discharge channel connecting the firing pipe to the external space, the slag discharge channel being formed inside the heat insulation component and the firing component, the inlet of which is connected to the firing pipe, and the outlet is located at the tail of the nail gun.

[0005] The pneumatic slag-discharge nail gun proposed in this invention uses a firing pin to strike a nail inside a firing tube. The resulting air pressure and gunpowder residue are discharged through a slag-discharge channel connecting the firing tube to the external space, achieving real-time cleaning of gunpowder residue. This eliminates the cumbersome steps of periodically disassembling traditional nail guns for residue cleaning. This integrated design not only significantly improves the continuous operation performance of the nail gun but also provides operators with a more efficient user experience.

[0006] In a pneumatic slag-discharge nail gun provided in this application, the slag discharge channel further includes a first channel, which is defined between the outer ring of the nail tube and the inner ring of the cover fitted on the outer ring; wherein, the inlet end of the first channel is connected to the firing channel through an exhaust hole opened on the wall of the nail tube.

[0007] In a pneumatic slag-discharging nail gun provided in this application, the firing assembly further includes a guide tube and an upper protective sleeve fitted on the outer ring of the second tube body. The gap between the outer ring of the second tube body and the inner ring of the upper protective sleeve forms a second channel of the slag discharge channel, and the inlet of the second channel is connected to the outlet of the first channel.

[0008] In a pneumatic slag-discharge nail gun provided in this application, the first channel and the second channel are further connected by a first clearance groove formed at the bottom of the nail tube. The first clearance groove structure not only reduces the difficulty of processing and manufacturing, but also effectively forms a gas flow channel with a larger cross-sectional size, preventing the residue generated after the gunpowder combustion from gradually accumulating in the channel, thereby completely avoiding the blockage problem caused by residue accumulation.

[0009] In a pneumatic slag-discharging nail gun provided in this application, the first channel and the second channel are further connected by a first clearance groove formed on the inner ring of the support base or by a through hole formed on the support base.

[0010] In a pneumatic slag-discharge type nail gun provided in this application, a sealing ring is further provided around the outer ring of the nail tube. This sealing ring is located at the entrance of the first clearance groove and is used to seal the entrance of the first clearance groove. When the gunpowder used for firing the nail is nitrate-containing gunpowder, it is necessary to prohibit the use of the slag discharge channel for slag discharge to prevent nitrate-containing gunpowder residue from entering the nail gun body and corroding the firing assembly. Therefore, the sealing ring can seal the first clearance groove, preventing nitrate-containing gunpowder residue from entering the nail gun body.

[0011] In a pneumatic slag-discharging nail gun provided in this application, the firing assembly further includes a lower protective sleeve, the inner ring of which fits onto the outer ring of the first tube body of the guide tube, and the gap between the two forms a third channel of the slag discharge channel, the inlet of which is connected to the outlet of the second channel.

[0012] In a pneumatic slag discharge nail gun provided in this application, the third channel and the second channel are further connected by a second clearance groove formed on the first tube body.

[0013] In a pneumatic slag-discharge nail gun provided in this application, the second clearance groove is a channel with a "D"-shaped cross-section, which is jointly defined by the milled edge surrounding the outer ring of the first tube and the lower inner ring of the upper protective sleeve. Similar to the first clearance groove, the "D"-shaped cross-section reduces the difficulty of manufacturing and effectively forms a gas flow channel with a larger cross-sectional size, preventing the gradual accumulation of residue generated after gunpowder combustion within the channel, thereby completely avoiding blockage problems caused by residue accumulation.

[0014] In a pneumatic slag-discharging nail gun provided in this application, the firing assembly further includes a base tube, the inner channel of which is a fourth channel of the slag-discharging channel, the inlet of which is connected to the outlet of which is connected to the outlet of which is connected to the external space.

[0015] The pneumatic slag-discharge nail gun proposed in this invention uses a firing pin to strike a nail inside a firing tube. The resulting air pressure and gunpowder residue are discharged through a slag-discharge channel connecting the firing tube to the external space, achieving real-time cleaning of gunpowder residue. This eliminates the cumbersome steps of periodically disassembling traditional nail guns for residue cleaning. This integrated design not only significantly improves the continuous operation performance of the nail gun but also provides operators with a more efficient user experience. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall cross-sectional structure of the pneumatic slag discharge nail gun of this application; Figure 2 This is a schematic diagram of the cross-sectional structure of the firing assembly of this application; Figure 3 This is a schematic diagram of the cross-sectional structure of the thermal insulation component of this application; Figure 4 This is a schematic diagram of the cross-sectional structure of the nail tube in this application; Figure 5 This is a schematic diagram of the cross-sectional structure of the guide tube in this application; Figure 6 This is a schematic diagram of the cross-sectional structure of the bottom tube in this application; Figure 7 This is a schematic diagram of the cross-sectional structure of the firing seat in this application; Label Explanation: 100. Thermal insulation component; 110. Nail tube; 111. Firing tube; 112. Third truncated cone; 113. Vent hole; 114. Exhaust hole; 120. Cover; 130. Protective tube; 140. Corner plate positioning seat; 200. Firing assembly; 210. Base tube; 211. First outer frustum; 212. First external thread; 213. First inner frustum; 214. First internal thread; 220. Lower protective sleeve; 221. Heat insulation pipe; 230. Firing seat; 231. First guide ramp; 232. Second guide ramp; 233. Second inner frustum; 240. The first spring; 250. Firing pin device; 251. Pin holder; 2511. First groove; 252. Firing pin; 253. Guide tube; 2531. First tube body; 2532. Second tube body; 2533. Pin hole; 254. Safety device; 2541. Second groove; 2542. Safety spring; 2543. Safety pin; 260. Put on a protective cover; 270. Support base; 280. Limiting device; 281. Limiting pin; 282. Limiting slot; 300. Slag Discharge Channel; 310. First Channel; 320. Second Channel; 330. Third Channel; 340. Fourth Channel; 350, First clearance groove; 360, Sealing ring; 370, Second clearance groove; 400. Nails. Detailed Implementation

[0017] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal," etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. Example 1

[0018] like Figure 1As shown, this application provides a pneumatic slag-discharge nail gun, including a heat insulation component 100, a firing component 200, and a slag discharge channel 300 connecting a firing pipe 111 to the external space. The heat insulation component 100 is located at the front end of the nail gun and has a nail tube 110 with a firing pipe 111 inside, which is used to accommodate and fire nails 400. The firing component 200 is connected to the end of the heat insulation component 100 and has a firing pin 252 inside that can extend into the firing pipe 111. The firing pin 252 is used to fire the gunpowder at the bottom of the nail 400. The slag discharge channel 300 is formed inside the heat insulation component 100 and the firing component 200, with its inlet connected to the firing pipe 111 and its outlet located at the tail end of the nail gun. The firing pin 252 strikes the nail 400 inside the firing tube 111. The resulting air pressure and gunpowder residue are discharged through the slag discharge channel 300, which connects the firing tube 111 to the external space. This achieves real-time cleaning of gunpowder residue, eliminating the cumbersome steps of periodically disassembling traditional nail guns for residue removal. This integrated design not only significantly improves the continuous operation performance of the nail gun but also provides operators with a more efficient user experience.

[0019] like Figure 2 As shown, the firing assembly 200 includes a base tube 210, a lower protective sleeve 220, a firing seat 230, a first spring 240, a firing pin device 250, an upper protective sleeve 260, a support seat 270, and a limiting device 280.

[0020] like Figure 6 As shown, a first outer frustum 211 is connected to the outer ring of the bottom tube 210, and a first external thread 212 is provided on the upper outer ring portion of the first outer frustum 211. A first inner frustum 213 is connected to the bottom of the inner ring of the bottom tube 210, and a first internal thread 214 is provided at the bottom of the first inner frustum 213.

[0021] like Figure 2 As shown, the lower protective sleeve 220 is a tube body. One end of the lower protective sleeve 220 is threaded to the first external thread 212 of the bottom tube 210, and its end abuts against the first outer frustum 211. A heat insulation tube 221 is fitted onto the outer ring of the lower protective sleeve 220. The lower part of the inner tube wall of the lower protective sleeve 220 adopts a smooth structure design.

[0022] like Figure 7 As shown, the firing seat 230 has a tubular structure, with its outer ring fitting against the bottom of the inner ring of the lower protective sleeve 220. One end of the firing seat 230 abuts against the end face of the bottom tube 210. The firing seat 230 has a second inner frustum 233 inside, and the upper surface of the second inner frustum 233 is a pressure-bearing surface. From top to bottom, the inner ring of the firing seat 230 has a first guide slope 231 and a second guide slope 232. The first guide slope 231 is located at the upper end face of the firing seat 230, and the second guide slope 232 is located between the first guide slope 231 and the second inner frustum 233.

[0023] The first spring 240 is coaxially connected to the bottom tube 210 and the lower protective sleeve 220. One end of its bottom abuts against the first inner truncated cone 213, and the other end is located inside the lower protective sleeve 220.

[0024] like Figure 2 and Figure 5 As shown, the firing pin device 250 includes a needle holder 251, a firing pin 252, a guide tube 253, and a safety device 254. The bottom of the needle holder 251 abuts against one end of the first spring 240, and its top has a first groove 2511, within which the firing pin 252 is fixed. The guide tube 253 includes a first tube body 2531 and a second tube body 2532, with their ends coaxially connected. The inner diameter of the first tube body 2531 is adapted to the outer diameter of the needle holder 251, and the first tube body 2531 fits onto the outer ring of the needle holder 251, allowing the needle holder 251 to slide axially along the first tube body 2531. The inner diameter of the second tube body 2532 is adapted to the outer diameter of the firing pin 252, and the second tube body 2532 fits onto the outer ring of the firing pin 252, allowing the firing pin 252 to slide axially along the second tube body 2532. The lower part of the needle holder 251 has a second groove 2541 for accommodating a safety device 254. The safety device 254 includes a safety spring 2542 and a safety pin 2543. The safety spring 2542 is located in the second groove 2541, with one end abutting against the bottom of the second groove 2541 and the other end supported on the safety pin 2543. One end of the safety pin 2543 extends into the second groove 2541 and slides along the axial direction of the second groove 2541. The other end of the safety pin 2543 passes through a pin hole 2533 opened on the first tube body 2531 of the guide tube 253 and abuts against the inner ring of the protective sleeve.

[0025] like Figure 2 As shown, the upper protective sleeve 260 is a tubular structure. One end of the upper protective sleeve 260 fits inside the lower protective sleeve 220, and its outer diameter matches the inner diameter of the lower protective sleeve 220, sliding axially along the inner ring of the lower protective sleeve 220. The lower outer ring of the upper protective sleeve 260 is recessed to form a step that mutually limits the upper flange of the guide tube 253. The second spring is located inside the lower protective sleeve 220 and fits on the outer ring of the guide tube 253. One end of the second spring abuts against the step formed on the inner ring of the lower protective sleeve 220, and the other end abuts against the end of the upper protective sleeve 260 that extends into the lower protective sleeve 220. The support 270 is connected to the end of the tubular structure for connecting the heat insulation assembly 100.

[0026] like Figure 2As shown, the limiting device 280 includes a limiting pin 281 connected at one end to the needle holder 251. The limiting pin 281 extends from the needle holder 251 toward the inner ring of the protective sleeve and inserts into a limiting groove 282 formed on the guide tube 253. The limiting pin 281 slides along the limiting groove 282. The limiting device 280 can limit the displacement distance of the firing pin device 250 within the protective sleeve and prevent the firing pin device 250 from disengaging from the protective sleeve.

[0027] S1: Assembly steps for firing assembly 200: S11: Fit the heat insulation tube 221 onto the outer ring of the protective sleeve, and thread the lower end of the protective sleeve onto the first external thread 212 of the bottom tube 210.

[0028] S12: Insert the firing pin 230 into the protective sleeve so that the bottom of the firing pin 230 abuts against the upper end of the base tube 210.

[0029] S13: The upper protective sleeve 260 is fitted onto the guide tube 253 from bottom to top, so that the upper end flange of the guide tube 253 abuts against the step of the upper protective sleeve 260.

[0030] S14: Fix one end of the firing pin 252 into the first groove 2511 of the needle holder 251, and then insert the firing pin 252 and the needle holder 251 into the first tube 2531 and the second tube 2532 of the guide tube 253, respectively. Then install the safety spring 2542 and the safety pin 2543 into the second groove 2541, respectively, with the safety pin 2543 passing through the pin hole 2533 opened on the first tube 2531.

[0031] S15: Insert the second spring into the protective sleeve; S16: After the first spring 240 is installed into the bottom of the needle holder 251, the needle holder 251 is inserted into the protective sleeve, so that the safety pin 2543 abuts against the inner ring of the protective sleeve, and the limiting pin 281 is inserted into the limiting long groove 282. S17: Cover the end of the upper protective sleeve 260 with the support base 270.

[0032] When the nail 400 needs to be fired, hold the heat insulation tube 221 outside the lower protective sleeve 220 and push the lower protective sleeve 220. Under the pushing force, the first spring 240 and the second spring deform successively. The safety pin 2543 in the safety device 254 moves closer to the firing seat 230. When the safety pin 2543 is pushed into the second groove 2541 by the first guide slope 231 and the second guide slope 232 of the firing seat 230, the first spring 240 releases its stored energy, pushing the needle seat 251 and the firing pin 252 quickly into the nail tube 110 and striking the gunpowder at the bottom of the nail 400, thus firing the nail 400.

[0033] like Figure 3As shown, the thermal insulation component 100 includes a nail tube 110, a cover 120, a protective tube 130, and a corner positioning seat 140.

[0034] like Figure 4 As shown, the nail tube 110 has a tube structure with a protruding third truncated cone 112 on its outer periphery. Several through holes are also provided on the third tube. These through holes include an outlet hole 113 and an exhaust hole 114. The outlet hole 113 and exhaust hole 114 are located on opposite sides of the third truncated cone 112. The outlet hole 113 is inclined and connected to the inner channel of the nail tube 110, allowing the propellant gas after firing to exit the nail tube 110 through the outlet hole 113. The exhaust hole 114 is inclined or vertically connected to the inner channel of the nail tube 110. An adjusting ring is connected to the exhaust hole 114, which can be used to control the opening and closing of the corresponding exhaust hole 114, thereby changing the propellant firing power. The upper section of the inner channel of the nail tube 110 is used to hold the nail 400 to be fired. The lower section is used to accommodate the needle tube of the firing assembly 200, allowing the firing pin 252 emitted from the needle tube to directly strike the bottom shell of the nail 400. The sleeve 120 is cylindrical, with one end overlapping the third frustum 112 of the nail tube 110, and the cylinder fits onto the outer ring of the nail tube 110. The protective tube 130 is cylindrical, with one end threaded onto the sleeve 120, and part of the tube fits onto the outer ring of the sleeve 120. The corner plate positioning seat 140 is threaded onto the nail tube 110 and is used to fix and position the nail 400.

[0035] S2: Assembly steps for thermal insulation component 100: S21: Pass the cap 120 through the upper end of the nail tube 110 and fit it on the outer ring of the nail tube 110, with its end overlapping the third frustum 112 of the nail tube 110. S22: Fit the protective tube 130 onto the outer ring of the cover 120, and thread its end onto the outer ring of the cover 120; S23: Thread the corner plate positioning seat 140 onto the end of the nail tube 110.

[0036] Assembly of firing assembly 200 and heat insulation assembly 100: S24: Pass the bottom of the nail tube 110 of the heat insulation component 100 through the center hole of the support base 270 and insert it into the upper protective sleeve 260. Rotate the cover 120 so that the bottom of the cover 120 is threadedly connected to the thread at the upper end of the upper protective sleeve 260. Example 2

[0037] like Figure 1As shown, based on Embodiment 1, in the pneumatic slag-discharge nail gun provided in this application, the slag discharge channel 300 includes a first channel 310, a second channel 320, a third channel 330, and a fourth channel 340. The first channel 310 is defined between the outer ring of the nail tube 110 and the inner ring of the cover 120 fitted onto the outer ring; wherein, the inlet end of the first channel 310 is connected to the firing channel 111 through an exhaust hole 114 opened on the wall of the nail tube 110.

[0038] The second channel 320 is defined in the gap between the outer ring of the second tube 2532 and the inner ring of the upper protective sleeve 260, and the inlet of the second channel 320 is connected to the outlet of the first channel 310. Furthermore, the first channel 310 and the second channel 320 are connected by a first clearance groove 350 formed at the bottom of the nail tube 110. The structure of the first clearance groove 350 not only reduces the difficulty of processing and manufacturing, but also effectively forms a gas flow channel with a larger cross-sectional size, preventing the gradual accumulation of residue generated after gunpowder combustion within the channel, thereby completely avoiding the blockage problem caused by residue accumulation.

[0039] Furthermore, in this application, the first clearance groove 350 may be formed on the inner ring of the support 270. The first channel 310 and the second channel 320 are connected through a channel formed on the inner ring of the support 270. In addition, the first channel 310 and the second channel 320 may also be connected through a through hole formed on the support 270.

[0040] The inner ring of the lower protective sleeve 220 fits onto the outer ring of the first tube body 2531 of the guide tube 253, and the gap between the two forms the third channel 330 of the slag discharge channel 300. The inlet of the third channel 330 is connected to the outlet of the second channel 320. The third channel 330 and the second channel 320 are connected by a second clearance groove 370 formed on the first tube body 2531. Preferably, the second clearance groove 370 is a channel with a "D" shaped cross-section, which is defined by the milled edge surrounding the outer ring of the first tube body 2531 and the lower inner ring of the upper protective sleeve 260. Similar to the first clearance groove 350, the "D" shaped cross-section can reduce the difficulty of processing and manufacturing, and can effectively form a gas flow channel with a larger cross-sectional size, preventing the residue generated after the gunpowder combustion from gradually accumulating in the channel, thereby completely avoiding the blockage problem caused by residue accumulation.

[0041] The inner channel of the bottom pipe 210 is the fourth channel 340 of the slag discharge channel 300. The inlet of the fourth channel 340 is connected to the outlet of the third channel 330, and the outlet of the fourth channel 340 is connected to the external space. Example 3

[0042] like Figure 1As shown, based on Embodiment 2, a sealing ring 360 is fitted around the outer ring of the nail tube 110. The sealing ring 360 is located at the entrance of the first clearance groove 350 and is used to seal the entrance of the first clearance groove 350. When the gunpowder used for firing the nail 400 is nitrate-containing gunpowder, it is necessary to prohibit the use of the slag discharge channel 300 for slag discharge to prevent nitrate-containing gunpowder residue from entering the nail gun body and corroding the firing assembly 200. Therefore, the sealing ring 360 can seal the first clearance groove 350, preventing nitrate-containing gunpowder residue from entering the nail gun body.

[0043] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A pneumatic slag discharge type nail gun, characterized in that, include A heat insulation component (100) is provided at the front end of the nail gun and has a nail tube (110) with a firing channel (111) inside, the channel being used to receive and fire the nail (400). The firing assembly (200) is connected to the end of the heat insulation assembly (100) and has a firing pin (252) that can extend into the firing tube (111). The firing pin (252) is used to fire the gunpowder at the bottom of the nail (400). And a slag discharge channel (300) connecting the firing pipe (111) to the external space, the slag discharge channel (300) being formed inside the heat insulation component (100) and the firing component (200), with its inlet connected to the firing pipe (111) and its outlet located at the tail of the nail gun.

2. The pneumatic slag discharge type nail gun according to claim 1, characterized in that, The slag discharge channel (300) includes a first channel (310) which is defined between the outer ring of the nail tube (110) and the inner ring of the cover (120) fitted on the outer ring; wherein, the inlet end of the first channel (310) is connected to the firing pipe (111) through an exhaust hole (114) opened on the wall of the nail tube (110).

3. The pneumatic slag discharge type nail gun according to claim 2, characterized in that, The firing assembly (200) includes a guide tube (253) and an upper protective sleeve (260) fitted on the outer ring of the second tube body (2532) of the guide tube (253). The gap between the outer ring of the second tube body (2532) and the inner ring of the upper protective sleeve (260) forms the second channel (320) of the slag discharge channel (300). The inlet of the second channel (320) is connected to the outlet of the first channel (310).

4. The pneumatic slag discharge type nail gun according to claim 3, characterized in that, The first channel (310) and the second channel (320) are connected by a first clearance groove (350) formed at the bottom of the nail tube (110).

5. The pneumatic slag discharge type nail gun according to claim 3, characterized in that, The first channel (310) and the second channel (320) are connected by a first clearance groove (350) formed on the inner ring of the support (270) or by a through hole formed on the support (270).

6. The pneumatic slag discharge type nail gun according to claim 4, characterized in that, The outer ring of the nail tube (110) is fitted with a sealing ring (360), which is located at the entrance of the first relief groove (350) and is used to block the entrance of the first relief groove (350).

7. The pneumatic slag discharge type nail gun according to claim 3, characterized in that, The firing assembly (200) also includes a lower protective sleeve (220), the inner ring of which fits onto the outer ring of the first tube body (2531) of the guide tube (253), and the gap between the two forms the third channel (330) of the slag discharge channel (300), the inlet of which is connected to the outlet of the second channel (320).

8. The pneumatic slag discharge type nail gun according to claim 7, characterized in that, The third channel (330) and the second channel (320) are connected by a second clearance groove (370) formed on the first tube (2531).

9. The pneumatic slag discharge type nail gun according to claim 8, characterized in that, The second clearance groove (370) is a channel with a "D" shaped cross section, which is defined by the milled edge surrounding the outer ring of the first tube body (2531) and the lower inner ring of the upper protective sleeve (260).

10. The pneumatic slag discharge type nail gun according to claim 7, characterized in that, The firing assembly (200) includes a bottom tube (210), the inner channel of which is the fourth channel (340) of the slag discharge channel (300). The inlet of the fourth channel (340) is connected to the outlet of the third channel (330), and the outlet of the fourth channel (340) is connected to the external space.

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