A bottom tube of a nailer, a firing assembly of the nailer, and the nailer

Abstract

The utility model discloses a bottom pipe of nail gun, firing assembly and nail gun belong to handheld nail tool technical field, including seat and firing part. The application is through setting up firing part on seat part, and the both are designed as split structure, makes seat part and firing part can be through end portion abutment and realizes combination assembly. The advantage of this split type design is that when the firing part appears wear, deformation and other damage conditions because of long -term bearing safety device trigger's guiding collision or firing recoil, only needs to replace firing part alone, need not to discard whole bottom pipe, greatly reduces use cost and maintenance difficulty. Meanwhile, the guiding surface on the firing part can provide accurate guidance for the trigger action of the safety device, ensuring that the safety device works stably and reliably during the use of the nail gun. The anti-collision circular table set below the guiding surface can concentrate the impact force on the firing part, without damaging the seat of the bottom pipe.

Description

Technical Field

[0001] This utility model relates to the field of handheld nailing tools, and more specifically, to a base tube, firing assembly, and nail gun of a nail gun. Background Technology

[0002] Nail guns are common decoration and construction tools, widely used in construction, furniture manufacturing, and other fields. They drive nails into the substrate quickly by striking the gunpowder at the base of the nail. In traditional nail guns, the base tube, as a key load-bearing structure of the firing mechanism, often suffers localized wear or structural deformation due to factors such as guiding impacts when the safety device is triggered and recoil after firing, affecting firing accuracy and service life. For example, Chinese utility model patent, publication number CN219170799U, entitled "A Novel Ceiling Nail Gun for Construction Use," discloses a firing tailstock (base tube) where the firing part and base are integrally formed. During firing, the bottom of the second firing pin seat impacts the inner step of the firing tailstock, causing deformation of the inner step and rendering the entire firing tailstock unusable. Utility Model Content

[0003] In view of the problem of easy wear of the bottom tube in the prior art, this utility model proposes a bottom tube, firing assembly and nail gun of a nail gun, which aims to solve the technical problems existing in the prior art by setting the seat and firing part of the nail tube separately.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows: A base tube for a nail gun, comprising Seat; The firing part is coaxially connected to one end of the base. The base and the firing part are separately disposed and their ends abut against each other. The firing part is provided with a guide surface for triggering the safety device of the nail gun, and an anti-collision platform is provided below the guide surface.

[0005] This application incorporates a firing mechanism on the base, designing both as separate units. The base and firing mechanism can be assembled by end-to-end contact. The advantage of this separate design is that when the firing mechanism suffers wear, deformation, or other damage due to prolonged exposure to the guiding impact of the safety device or the recoil after firing, only the firing mechanism needs to be replaced, eliminating the need to discard the entire base tube. This significantly reduces usage costs and maintenance difficulty. Simultaneously, the guide surface on the firing mechanism provides precise guidance for the safety device's triggering action, ensuring stable and reliable operation of the safety device during nail gun use. Furthermore, the anti-collision platform below the guide surface concentrates the impact force onto the firing mechanism, preventing damage to the base tube's base.

[0006] In the base tube of the nail gun provided in this application, the surface hardness of the anti-collision pedestal is greater than the hardness of the seat portion. The entire firing part or the anti-collision pedestal can be heat-treated individually, which can significantly increase the hardness of the firing part and thus slow down the damage rate of the firing part.

[0007] In the base tube of a nail gun provided in this application, the thickness of the anti-collision truncated cone is greater than or equal to the wall thickness of the seat at the junction of the two.

[0008] This design ensures that the anti-collision platform has sufficient structural strength to withstand the impact force during firing, preventing deformation or breakage due to insufficient thickness. Furthermore, it significantly reduces the risk of impact deformation of the base at the bottom of the anti-collision platform, extending the overall service life of the base tube.

[0009] In the bottom tube of the nail gun provided in this application, further, s=h, where s is the distance between the firing point on the guide surface and the upper surface of the anti-collision cylinder; h is the distance from the center of the pin hole of the guide tube to the bottom end of the guide tube. This dimensional design, by setting the distances from the firing point and the center of the pin hole to the bottom end of the guide tube to be equal, ensures that the guide tube contacts the anti-collision cylinder precisely at the moment the safety pin disengages from the inner wall of the lower protective sleeve, avoiding additional impact on the anti-collision cylinder due to excessive falling distance of the guide tube, thereby further reducing wear on the anti-collision cylinder.

[0010] In the base tube of a nail gun provided in this application, the guide surface further includes a first guide ramp and a second guide ramp. The first guide ramp is located at the port, and the second guide ramp is located between the first guide ramp and the anti-collision truncated cone. The first guide ramp can smoothly guide the end of the safety pin to the inner ring position of the firing part, and the second guide ramp can further guide the safety pin to disengage from the pin hole to achieve firing.

[0011] This application provides a firing assembly for a nail gun, including... Bottom pipe; Lower protective sleeve, one end of which is connected to the bottom tube; The first spring is coaxially housed within the bottom tube and the lower protective sleeve, with one end abutting against the first inner circular platform and the other end located within the lower protective sleeve. A firing pin device is located inside the lower protective sleeve, with one end abutting against one end of the first spring, for firing the nail; A limiting device, connected to the firing pin device, is used to control the firing of the firing pin device; The upper protective sleeve fits inside the lower protective sleeve; The second spring has one end abutting against the inner wall of the upper protective sleeve and the other end abutting against the end of the lower protective sleeve; A support base is attached to the end of the upper protective sleeve.

[0012] In a firing assembly of a nail gun provided in this application, the firing pin device further includes... The needle holder has its bottom abutting against one end of the first spring and its top having a first groove; The firing pin has one end connected to the first groove; The guide tube includes a first tube body and a second tube body coaxially connected. The inner diameter of the first tube body is adapted to the outer diameter of the needle seat, and the needle seat is slidably sleeved in the first tube body. The inner diameter of the second tube body is adapted to the outer diameter of the firing pin, and the firing pin is slidably inserted into the second tube body. The safety device includes a safety spring and a safety pin. The safety spring is housed in a second groove, with one end abutting against the bottom of the second groove and the other end supporting the safety pin. One end of the safety pin extends into the second groove and can slide along its axial direction, while the other end passes through a pin hole provided on the first tube and can abut against the inner wall of the lower protective sleeve.

[0013] This application provides a nail gun, including a firing assembly, and A heat insulation component is connected to the end of the firing component, and the interior of the heat insulation component is provided with a nail tube for receiving and firing the nail.

[0014] In a nail gun provided in this application, a slag discharge channel is further included. The slag discharge channel is located inside the nail gun, with one end connected to the firing channel of the nail tube and the other end extending to the tail of the nail gun and communicating with the external space.

[0015] The beneficial effects of this application are:

[0016] This application incorporates a firing mechanism on the base, designing both as separate units. The base and firing mechanism can be assembled by end-to-end contact. The advantage of this separate design is that when the firing mechanism suffers wear, deformation, or other damage due to prolonged exposure to the guiding impact of the safety device or the recoil after firing, only the firing mechanism needs to be replaced, eliminating the need to discard the entire base tube. This significantly reduces usage costs and maintenance difficulty. Simultaneously, the guide surface on the firing mechanism provides precise guidance for the safety device's triggering action, ensuring stable and reliable operation of the safety device during nail gun use. Furthermore, the anti-collision platform below the guide surface concentrates the impact force onto the firing mechanism, preventing damage to the base tube's base. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cross-sectional structure of the firing assembly during compression in this application; Figure 2This is a schematic diagram of the cross-sectional structure of the firing section of the nail tube in this application; Figure 3 This is a schematic diagram of the cross-sectional structure of the seat portion of the nail tube in this application; Figure 4 This is a schematic diagram of the overall cross-sectional structure of the nail gun in this application; Figure 5 This is a schematic diagram of the cross-sectional structure of the firing assembly when it is stretched. Figure 6 This is a schematic diagram of the cross-sectional structure of the guide tube in this application; Figure 7 This is a schematic diagram of the cross-sectional structure of the thermal insulation component of this application; Figure 8 This is a schematic diagram of the cross-sectional structure of the nail tube 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. Seat; 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 mechanism; 231. First guide ramp; 232. Second guide ramp; 233. Anti-collision truncated cone; 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

[0018] 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

[0019] like Figure 1-3 As shown, this application provides a base tube for a nail gun, including a seat portion 210 and a firing portion 230.

[0020] A first outer frustum 211 is connected to the outer ring of the seat 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 seat 210, and a first internal thread 214 is provided at the bottom of the first inner frustum 213.

[0021] The firing part 230 is coaxially connected to one end of the base 210. The base 210 and the firing part 230 are separate units, with their ends abutting against each other. The firing part 230 has a guide surface for triggering the safety device 254 of the nail launcher, and a shock-absorbing truncated cone 233 is provided below the guide surface. This application, by setting the firing part 230 on the base 210 and designing the two as separate structures, allows the base 210 and the firing part 230 to be assembled by abutting their ends. The advantage of this separate design is that when the firing part 230 suffers wear, deformation, or other damage due to long-term exposure to the guide impact of the safety device 254 or the recoil force after firing, only the firing part 230 needs to be replaced, without discarding the entire base tube, significantly reducing usage costs and maintenance difficulty. Meanwhile, the guide surface on the firing part 230 can provide precise guidance for the triggering action of the safety device 254, ensuring that the safety device 254 works stably and reliably during the use of the nail gun. The anti-collision platform 233 set below the guide surface can concentrate the impact force on the firing part 230, so as not to damage the seat 210 of the base tube. Example 2

[0022] like Figure 4 Figure 6 As shown, the firing assembly 200 includes a lower protective sleeve 220, a first spring 240, a firing pin device 250, an upper protective sleeve 260, a support base 270, and a limiting device 280. Figure 2 Specifically, the lower protective sleeve 220 is a tubular structure, with one end threadedly connected to the first external thread 212 of the seat 210, and the end tightly abutting against the first outer frustum 211. The outer ring of the lower protective sleeve 220 is fitted with a heat insulation tube 221, and the lower part of its inner tube wall is designed to be smooth.

[0023] The first spring 240 is coaxially mounted between the seat 210 and the lower protective sleeve 220, with one end of its bottom contacting the first inner truncated cone 213 and the other end located inside the lower protective sleeve 220.

[0024] The firing pin device 250 consists of a needle holder 251, a firing pin 252, a guide tube 253, and a safety device 254. The bottom of the needle holder 251 is connected to one end of a first spring 240, and the top has a first groove 2511 in which the firing pin 252 is fixed. The guide tube 253 includes a first tube body 2531 and a second tube body 2532, whose ends are coaxially connected. The inner diameter of the first tube body 2531 is adapted to the outer diameter of the needle holder 251, and the needle holder 251 is fitted inside and slides axially. The inner diameter of the second tube body 2532 is adapted to the outer diameter of the firing pin 252, and the firing pin 252 slides within it. The lower part of the needle holder 251 has a second groove 2541 for accommodating the safety device 254. The safety device 254 includes a safety spring 2542 and a safety pin 2543. One end of the safety spring 2542 abuts against the bottom of the groove, and the other end supports the safety pin 2543. One end of the safety pin 2543 extends into the groove and slides axially, while the other end passes through the pin hole 2533 of the first tube 2531 and abuts against the inner ring of the protective sleeve. The pin hole 2543 consists of a circular hole with a diameter of 9.5 mm and an elongated hole with a width of 6 mm, connected at both ends. In this application, the center of the pin hole 2543 is the center of its circular hole.

[0025] In this application, s = h, where s is the distance between the firing point on the guide surface and the upper surface of the anti-collision truncated cone 233; h is the distance from the center of the pin hole 2533 of the guide tube to the bottom end of the guide tube 253. This dimensional design, by setting the distances from the firing point and the center of the pin hole 2533 to the bottom end of the guide tube 253 to be equal, ensures that the bottom end of the guide tube 253 contacts the anti-collision truncated cone 233 precisely at the moment the safety pin 2543 disengages from the inner wall of the lower protective sleeve 230. This avoids additional impact on the anti-collision truncated cone 233 due to excessive falling distance of the guide tube 253, thereby further reducing the wear of the anti-collision truncated cone 233.

[0026] The upper protective sleeve 260 is also a tubular structure, with one end fitted into the lower protective sleeve 220. Its outer diameter matches the inner diameter, allowing it to slide axially along the inner ring. Its lower outer ring is recessed, forming a step that mutually limits its movement with the upper flange of the guide tube 253. The second spring is located inside the lower protective sleeve 220, fitted onto the outer ring of the guide tube 253. One end abuts against the inner ring step of the lower protective sleeve, and the other end abuts against the portion of the upper protective sleeve 260 that extends into it. The support 270 is connected to the end of the tube body for connecting the heat insulation assembly 100.

[0027] The limiting device 280 includes a limiting pin 281 connected to the needle holder 251. The limiting pin 281 extends into the inner ring of the protective sleeve and is inserted into the limiting groove 282 of the guide tube 253. It slides along the groove to limit the displacement of the firing pin device 250 within the protective sleeve and prevent it from detaching.

[0028] The assembly steps for the firing assembly 200 are as follows: S11: Fit the heat insulation tube 221 onto the outer ring of the lower protective sleeve, and connect the lower end of the lower protective sleeve to the first external thread 212 of the seat 210.

[0029] S12: Insert the firing part 230 into the protective cover, with its bottom abutting against the upper end of the base 210.

[0030] S13: Place the upper protective sleeve 260 onto the guide tube 253 from bottom to top, so that the flange abuts against the step.

[0031] S14: Fix one end of the firing pin 252 to 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. Install the safety spring 2542 and the safety pin 2543 into the second groove 2541, with the safety pin 2543 passing through the pin hole 2533.

[0032] S15: Install the second spring into the protective sleeve.

[0033] S16: Insert the first spring 240 into the bottom of the needle seat 251, insert the protective sleeve, so that the safety pin 2543 abuts against the inner ring, and the limit pin 281 is inserted into the limit slot 282.

[0034] S17: Cover the end of the upper protective sleeve 260 with the support base 270.

[0035] When the nail 400 needs to be fired, hold the heat insulation tube 221 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 approaches the firing part 230 and enters the second groove 2541 under the push of the first guide slope 231 and the second guide slope 232. At this time, the first spring 240 releases energy, pushing the needle seat 251 and the firing pin 252 to quickly enter the nail tube 110, striking the gunpowder at the bottom of the nail 400, thus achieving firing.

[0036] like Figure 7 Figure 8 As shown, the heat insulation component 100 includes a nail tube 110, a cover 120, a protective tube 130, and a corner positioning seat 140.

[0037] like Figure 8 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 impact 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.

[0038] 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.

[0039] 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 3

[0040] like Figure 4As shown, in this embodiment, the nail gun is provided with a slag discharge channel 300, which 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 a vent hole 114 opened on the wall of the nail tube 110.

[0041] 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.

[0042] 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 by a structure formed on the inner ring of the support 270. In addition, the first channel 310 and the second channel 320 may also be connected by a through hole formed on the support 270.

[0043] 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.

[0044] The inner channel of the seat 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.

[0045] The foregoing illustrative description of the present invention and its embodiments is not restrictive, and the accompanying drawings 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 base tube for a nail gun, characterized in that, include Seat (210); The firing part (230) is coaxially connected to one end of the base (210). The base (210) and the firing part (230) are separately provided, with their ends abutting each other. The firing part (230) is provided with a guide surface for triggering the safety device (254) of the nail gun, and a collision-resistant platform (233) is provided below the guide surface.

2. The base tube of the nail gun according to claim 1, characterized in that, The surface hardness of the anti-collision truncated cone (233) is greater than the hardness of the seat (210).

3. The base tube of the nail gun according to claim 2, characterized in that, The thickness of the anti-collision truncated cone (233) is the same as the wall thickness of the seat (210) at the connection between the two.

4. The base tube of the nail gun according to claim 1, characterized in that, s=h, where s is the distance between the firing point on the guide surface and the upper surface of the anti-collision truncated cone (233); h is the distance from the center of the pin hole (2533) of the guide tube (253) to the bottom end of the guide tube (253).

5. The base tube of the nail gun according to claim 1, characterized in that, The guide surface includes a first guide slope (231) and a second guide slope (232). The first guide slope (231) is located at the port, and the second guide slope (232) is located between the first guide slope (231) and the anti-collision truncated cone (233).

6. A firing assembly (200) for a nail gun, characterized in that, include The bottom tube as described in any one of claims 1 to 5; The lower protective sleeve (220) is connected at one end to the bottom tube; The first spring (240) is coaxially housed within the bottom tube and the lower protective sleeve (220), with one end abutting against the first inner truncated cone (213) and the other end located within the lower protective sleeve (220); A firing pin device (250) is provided inside the lower protective sleeve (220), one end of which abuts against one end of the first spring (240) for firing the nail; A limiting device (280) is connected to the firing pin device (250) and is used to control the firing of the firing pin device (250); The upper protective sleeve (260) fits inside the lower protective sleeve (220); The second spring has one end abutting against the inner wall of the upper protective sleeve (260) and the other end abutting against the end of the lower protective sleeve (220); Support base (270) is connected to the end of the upper protective sleeve (260).

7. The firing assembly (200) according to claim 6, characterized in that, The firing pin device (250) includes The needle holder (251) has its bottom abutting against one end of the first spring (240) and its top is provided with a first groove (2511). The firing pin (252) has one end connected to the first groove (2511); The guide tube (253) includes a first tube body (2531) and a second tube body (2532) coaxially connected. The inner diameter of the first tube body (2531) is adapted to the outer diameter of the needle seat (251), and the needle seat (251) is slidably sleeved inside 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 firing pin (252) is slidably inserted inside the second tube body (2532). The safety device (254) includes a safety spring (2542) and a safety pin (2543). The safety spring (2542) is housed in a second groove (2541), with one end abutting against the bottom of the second groove (2541) and the other end supporting the safety pin (2543). One end of the safety pin (2543) extends into the second groove (2541) and can slide along its axial direction, while the other end passes through a pin hole (2533) provided on the first tube body (2531) and can abut against the inner wall of the lower protective sleeve (220).

8. A nail gun, characterized in that, Including the firing assembly (200) as described in claim 7, and A heat insulation assembly (100) is connected to the end of the firing assembly (200), and the interior of the heat insulation assembly (100) is provided with a nail tube (110) for receiving and firing a nail.

9. The nail gun according to claim 8, characterized in that, It also includes a slag discharge channel (300), which is located inside the nail gun. One end of the slag discharge channel (300) is connected to the firing channel (111) of the nail tube (110), and the other end extends to the tail of the nail gun and communicates with the external space.

10. The nail gun according to claim 9, 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 to 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); 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). 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 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); 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). 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); The third channel (330) and the second channel (320) are connected by a second clearance groove (370) formed on the first tube (2531).

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