Firing mechanism and nail shooting device

Abstract

The utility model discloses a percussion mechanism which comprises a main sleeve, a percussion sleeve and a driving hammer, a top spring and a percussion pin are installed on the driving hammer, and a through groove is formed in the percussion sleeve. A through hole is formed in the rear end of the through groove; a percussion surface is arranged in the main sleeve. The percussion mechanism is characterized in that the outer diameter of the upper part of the percussion pin is gradually reduced upwards; the width of the through groove is smaller than the outer diameter of the lower end of the upper part and larger than the outer diameter of the upper end of the upper part; the inner diameter of the through hole is greater than the outer diameter of the lower end of the upper part; a limiting groove is formed in the main sleeve; the percussion surface is positioned at the rear end of the limiting groove; the width of the limiting groove is smaller than the outer diameter of the lower end of the upper portion and larger than the outer diameter of the upper end of the upper portion. According to the utility model, the percussion pin is in smooth transition when sliding back to the position of the through hole from the through groove, is not clamped at the position of the through hole, can be automatically reset upwards under the ejection action, and meanwhile, the precision requirements of the through groove and the through hole are reduced, so that the processing difficulty is reduced. The utility model further discloses a nail shooting device.

Description

Technical Field

[0001] The utility model relates to a firing mechanism and a nail shooter. Background Art

[0002] A nail shooter (also called a nail gun or nail gun or integrated nail fastener, etc.) uses blank cartridges, gas or compressed air as power to drive nails into a building. The firing mechanism is the core component of the nail shooter.

[0003] The prior art that is currently the closest to the present application is a firing release device (CN206527705U) applied to an axial nail shooter, which includes a firing sleeve, a hammer and a main sleeve. The firing sleeve has a through slot, and the end of the through slot is a through hole; a brake pin is installed on the hammer, and a top spring is installed under the brake pin; a firing pin is installed at the front end of the hammer. The key point is that the brake pin (or "firing pin") includes a thick part at the bottom, a middle and thin part above the thick part, a thin part above the middle and thin part, and the thin part and the middle and thin part form an upper step, and the middle and thin part and the thick part form a lower step; the width of the through slot is smaller than the diameter of the middle and thin part and larger than the diameter of the thin part; the diameter of the through hole is smaller than the diameter of the thick part and larger than the diameter of the middle and thin part; the main sleeve has a firing surface, etc. By changing the brake pin structure, the original thin part is decomposed into a thin-middle-fine structure, so that the middle-fine part completes the front and rear limit functions, the thin part only completes the compression function, and the thick part still completes the upper limit function. In this way, the brake pin can be released with a reduced downward movement (the detail is located in the through groove), which reduces the difficulty of processing and assembly and reduces the manufacturing cost. However, compared with the present application, it still has the following shortcomings and is analyzed as follows:

[0004] First, since the thin part and the middle thin part of the existing brake pin (CN206527705U) form an upper step, and the middle thin part and the thick part form a lower step, when the brake pin slides back from the through groove to the through hole, due to the step structure, the transition is poor, and it is particularly easy to get stuck at the through hole and cannot be reset upward under the action of the top spring; at the same time, the center of the through hole must be on the symmetrical center line of the groove sliding, which requires high processing accuracy, is difficult to process, and has high cost;

[0005] Second, since the existing (CN206527705U) reset pin slides with the reset guide groove on the firing sleeve, and the brake pin slides with the through groove, the fitting error is increased due to the separate guide sliding fit. At the same time, the relative position and parallelism of the reset guide groove and the through groove will be affected by the processing accuracy, thereby reducing the movement precision and stability.

[0006] Third, since there is only one firing surface in the main sleeve of the existing (CN206527705U), it will be worn and deformed due to long-term impact, resulting in a short service life and high overall replacement cost;

[0007] Fourth, since there is only one set of through grooves, through grooves and reset guide grooves on the existing (CN206527705U) firing sleeve, there is wear and deformation due to long-term impact, which leads to a short service life and high overall replacement cost;

[0008] Fifth, since the existing (CN206527705U) reset pin and brake pin are perpendicular to each other, the reset pin must be set horizontally, and the lower side of the firing sleeve has no designed groove and cannot be automatically cut (such as waste dropped from the nail), resulting in a problem of jamming failure. Utility Model Content

[0009] The utility model provides a firing mechanism to at least solve the problem in the prior art that when a firing pin (or "brake pin") slides back from a through slot to a through hole position, it has a step structure with poor transition and is easily stuck in the through hole and cannot be reset upward.

[0010] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is: a firing mechanism, including a main sleeve, a firing sleeve and a hammer, the hammer is equipped with a top spring and a firing pin, the firing sleeve is provided with a through slot; the rear end of the through slot is provided with a through hole; the main sleeve is provided with a firing surface, characterized in that: the upper outer diameter of the firing pin gradually decreases upward; the width of the through slot is smaller than the outer diameter of the lower end of the upper part and larger than the outer diameter of the upper end of the upper part; the inner diameter of the through hole is larger than the outer diameter of the lower end of the upper part; the main sleeve is provided with a limiting groove; the firing surface is located at the rear end of the limiting groove; the width of the limiting groove is smaller than the outer diameter of the lower end of the upper part and larger than the outer diameter of the upper end of the upper part.

[0011] By adopting the above scheme, since the outer diameter of the upper part of the firing pin gradually decreases (not suddenly) without a step structure, during the reset stage, when the upper part of the firing pin moves from the through groove of the firing sleeve to the through hole, it can smoothly transition and pop up and reset more smoothly under the action of the top spring, and will not get stuck at the through hole, thereby overcoming the problem that the existing firing pin adopts a step structure with poor transition, is easy to get stuck at the through hole and cannot be reset upward when it is ejected.

[0012] Since the width of the limiting groove is smaller than the outer diameter of the lower end of the upper part and larger than the outer diameter of the upper part of the firing pin; during the power storage stage, the upper part of the firing pin is located in the through hole, and the middle of the upper part of the firing pin is inserted into the limiting groove and can slide axially, but is radially limited by the limiting groove and the position is highly stable; at this time, the firing sleeve, hammer and firing pin of the nail shooter can move backward as a whole relative to the main sleeve and compress the firing spring to continuously store energy, thereby meeting normal work during the power storage stage.

[0013] Since the width of the through slot is smaller than the outer diameter of the lower end of the upper part and larger than the outer diameter of the upper end of the firing pin; after the firing process is completed, the upper middle part of the firing pin is inserted into the through slot of the firing sleeve and can slide axially, but is radially limited by the through slot and the position is highly stable; it can ensure that when the firing pin moves back to the through hole position, it will pop up again under the action of the top spring to complete the reset, so as to meet the normal working conditions during the reset stage.

[0014] At the same time, since the upper outer diameter of the firing pin in this solution gradually decreases upward and has a smooth surface, it can automatically guide the transition into the through hole. In this way, a small deviation of the through hole on the symmetrical center line of the groove can meet the requirements. Therefore, the processing accuracy requirements are lower and the processing difficulty is also small.

[0015] Furthermore, a reset pin is installed on the hammer; the reset pin is slidably matched with the through slot and the limiting slot at the same time.

[0016] Furthermore, the reset pin is detachably mounted on the hammer.

[0017] Preferably, the upper portion is conical, ellipsoidal or spherical.

[0018] Furthermore, a plurality of through slots are provided on the firing sleeve along the circumferential direction, and through holes are provided at the rear ends of at least two of the through slots.

[0019] Furthermore, a plurality of the limiting grooves are provided in the main sleeve; and the firing surface is provided at the rear ends of at least two of the limiting grooves.

[0020] Furthermore, a firing pin mounting hole is provided on the hammer; a spring lower end positioning hole is provided at the lower end of the firing pin mounting hole; a spring upper end positioning hole is provided at the lower end of the firing pin; and both ends of the top spring are respectively inserted into the spring lower end positioning hole and the spring upper end positioning hole.

[0021] Furthermore, the main sleeve comprises a main body sleeve and an inner sleeve; the inner sleeve is detachably mounted in the main body sleeve; the limiting groove and the firing surface are arranged on the inner sleeve.

[0022] Furthermore, the inner sleeve is inserted into the body sleeve and the inner wall of the body sleeve is provided with a step stop surface for limiting the rearward displacement of the inner sleeve.

[0023] Another object of the utility model is to disclose a nail shooter, characterized in that it has a firing mechanism according to any one of the above technical solutions.

[0024] Beneficial effects of the utility model:

[0025] First, the utility model adopts a different structural design from the existing one, and can also meet the various functional and technical requirements of the charging stage, the firing stage, and the resetting stage;

[0026] Secondly, the outer diameter of the upper part of the firing pin of the utility model gradually decreases upward; in the reset stage, when the upper part of the firing pin moves from the through groove of the firing sleeve to the through hole, it can smoothly transition and more smoothly pop up and reset under the action of the top spring, and will not get stuck at the through hole, thus overcoming the problem that the existing firing pin adopts a step structure and has poor transition, is easy to get stuck at the through hole and cannot be reset upward by the top spring;

[0027] Third, in the utility model, since the outer diameter of the upper part of the firing pin gradually decreases upward, it automatically guides the transition and enters the through hole, so that the through hole can be allowed to have a small deviation on the symmetrical center line of the groove slide, which can meet the requirements, so the processing accuracy requirements are lower and the processing difficulty is small;

[0028] Fourth, the utility model provides a plurality of through slots along the circumferential direction on the firing sleeve, and provides through holes at the rear ends of at least two of the through slots. When the through holes at the rear ends of the original through slots are worn or deformed after being used for a period of time, the firing pin can be reversibly assembled to match the through holes at the rear ends of another through slot. Then, the firing sleeve can continue to be used normally, and the service life can be doubled without the need to replace the firing sleeve, and the maintenance cost can be reduced.

[0029] Fifth, the utility model provides a plurality of limit grooves on the main sleeve; and provides the firing surface at the rear end of at least two of the limit grooves; when the firing surface at the rear end of the original limit groove is worn or deformed after being used for a period of time, it can be reversibly assembled and then can continue to be used normally, which can extend the service life by multiples without the need to replace the main sleeve, and reduce the maintenance cost;

[0030] Sixth, the main sleeve of the utility model is detachably connected through the main body sleeve and the inner sleeve. After the firing surface of the main sleeve is worn or deformed, only the inner sleeve needs to be replaced, and the main body sleeve is retained without the need for overall replacement, which can reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional diagram of a firing mechanism in Embodiment 1 of the present utility model.

[0032] Figure 2 It is a three-dimensional half-section diagram of a firing mechanism in Embodiment 1 of the present utility model.

[0033] Figure 3 yes Figure 1 Cross-section view at AA in the middle.

[0034] Figure 4 yes Figure 1Cross-section diagram at the middle BB.

[0035] Figure 5 It is a three-dimensional diagram of a firing mechanism in Embodiment 1 of the present utility model when the main sleeve is not assembled.

[0036] Figure 6 It is a structural schematic diagram of a specific embodiment of a firing pin.

[0037] Figure 7 This is a comparison diagram when the upper portion of the firing pin is in a conical shape, an ellipsoidal shape, or a spherical arc shape.

[0038] Figure 8-9 It is a structural schematic diagram of a first specific implementation mode of the main sleeve.

[0039] Figure 10-11 It is a schematic structural diagram of a first specific embodiment of the firing sleeve.

[0040] Fig.12 This is a working state diagram of a firing mechanism in the first embodiment of the utility model during the power storage stage.

[0041] Fig.13 This is a working state diagram of a firing mechanism in Embodiment 1 of the utility model when the firing pin is retracted into the through hole in the firing stage.

[0042] Fig.14 This is a working state diagram of a firing mechanism in the first embodiment of the present utility model at the beginning of the resetting stage.

[0043] Fig.15 It is a structural schematic diagram of a second specific embodiment of the main sleeve.

[0044] Figure 16-17 It is a schematic structural diagram of a second specific embodiment of the firing sleeve.

[0045] Fig.18 It is a structural schematic diagram of a firing mechanism in Embodiment 3 of the present utility model when the main sleeve is not assembled.

[0046] Fig.19 It is a structural schematic diagram of a specific implementation method of the main set in the fourth embodiment.

[0047] Fig. 20 It is a structural schematic diagram of a specific implementation method of the inner sleeve in Example 4.

[0048] Fig.21 It is a structural schematic diagram of a nail shooter in Embodiment 5 of the present utility model. DETAILED DESCRIPTION

[0049] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0050] Example 1: See Figure 1-11 A firing mechanism comprises a main sleeve 1, a firing sleeve 2 and a hammer 3, wherein a top spring 4 and a firing pin 5 are installed on the hammer 3.

[0051] In this embodiment, see Figure 2 The hammer 3 is provided with a firing pin mounting hole 3-1, and the top spring 4 is located in the firing pin mounting hole 3-1; the lower part of the firing pin 5 is inserted into the firing pin mounting hole 3-1 and supported by the top spring 4. In this embodiment, the matching manner of mounting the top spring 4 and the firing pin 5 on the hammer 3 adopts the existing structure, so it is not repeated.

[0052] See also Fig.12 When in use, a firing pin 7 is installed at the front end of the hammer 3.

[0053] The firing sleeve 2 is provided with a through slot 2-1; the rear end of the through slot 2-1 is provided with a through hole 2-2; and the main sleeve 1 is provided with a firing surface 1-2. In this embodiment, the firing surface 1-2 is an inclined surface. In other embodiments, the specific shape of the firing surface 1-2 can adopt an existing known structure.

[0054] The difference between this embodiment and the prior art is that: Figure 6-7 The outer diameter of the upper portion 5 - 1 of the firing pin 5 gradually decreases upward.

[0055] Combination Figure 2-3 and Figure 6-7 The width S1 of the through groove 2-1 is smaller than the outer diameter (i.e., outer diameter) D1 of the lower end of the upper part 5-1 and larger than the outer diameter (i.e., outer diameter) D2 of the upper end of the upper part 5-1; the inner diameter (i.e., inner diameter) D3 of the through hole 2-2 is larger than the outer diameter D1 of the lower end of the upper part 5-1; a limiting groove 1-1 is provided on the main sleeve 1; the firing surface 1-2 is located at the rear end of the limiting groove 1-1; the width S2 of the limiting groove 1-1 is smaller than the outer diameter D1 of the lower end of the upper part 5-1 and larger than the outer diameter D2 of the upper end of the upper part 5-1.

[0056] For example, see Figure 7 The upper portion 5-1 may be in the shape of a cone, an ellipsoid, a spherical arc, or other structure that can satisfy the requirement of gradually decreasing outer diameter.

[0057] In this embodiment, see Figure 6 Preferably, the upper portion 5-1 is conical.

[0058] Preferably, the inner diameter D3 of the through hole 2-2 is slightly larger than the outer diameter D1 of the lower end of the upper portion 5-1 (optimally, the fitting clearance is less than 1 mm).

[0059] Can be combined Fig.21 , the working stages of this embodiment are as follows:

[0060] In the first stage (energy storage stage): The firing pin 5 is located in the through hole 2-2, and under the action of the top spring 4, the middle part of its upper part 5-1 is stuck by the limiting groove 1-1. At this time, the upper part of the firing pin 5 can slide axially and is radially (stable in position height) limited on the limiting groove 1-1 in the main sleeve 1 (since D2 < S2 < D1); at the same time, since the outer diameter D1 of the lower end of the upper part 5-1 is greater than the width S1 of the through groove 2-1, it cannot move back and forth relative to the firing sleeve 2. At this time, the firing sleeve 2, the hammer 3 and the firing pin 5 of the nail gun move backward as a whole relative to the main sleeve 1 and continuously store energy by compressing the firing spring 8 (which can be combined with Fig.12 and Fig.19 );

[0061] In the second stage (firing stage): During the movement, when the top end of the upper part of the firing pin 5 contacts the firing surface 1-2 in the main sleeve 1, the firing pin 5 is pressed downward and compressed. Finally, the firing pin 5 moves downward until its top end retracts into the through hole 2-2 of the firing sleeve and no longer protrudes (which can be combined with Fig.13 ); At this time, the hammer 3 is no longer restricted, and then it moves forward rapidly under the action of the firing spring 8;

[0062] In the third stage (reset stage): After the firing process is completed, under the action of the reset spring 9, the hammer 3 and the firing pin 5 move backward relative to the firing sleeve 2, and the middle part of the upper part 5-1 of the firing pin 5 is inserted into the through groove 2-1 of the firing sleeve and can slide axially and is radially (stable in position height) limited (since D2 < S1 < D1, which can be combined with Fig.14 ); When the firing pin 5 moves backward to the position of the through hole 2-2, it will pop up again under the action of the top spring 4 to complete the reset.

[0063] This embodiment has the following characteristics and explanations are as follows:

[0064] First, this embodiment adopts a different structural design from the existing one (the core difference: the outer shape structure of the upper part 5-1 of the firing pin 5 in this application is different from the double-step structure used in the prior art; at the same time, this application adds a limiting groove 1-1 on the main sleeve 1, which is different from the prior art where there is no design of a limiting groove on the main sleeve 1), and can also meet the various functions and technical requirements of the energy storage stage, the firing stage, and the reset stage;

[0065] Second, compared with the prior art, the outer diameter of the upper portion 5-1 of the firing pin 5 of this embodiment gradually decreases upward; in the reset stage, when the upper portion 5-1 of the firing pin 5 moves from the through slot 2-1 of the firing sleeve 2 to the through hole 2-2, it can smoothly transition and more smoothly pop up and reset under the action of the top spring 4, and will not get stuck at the through hole, thus overcoming the problem that the existing firing pin 5 adopts a step structure and has poor transition, is easy to get stuck at the through hole and cannot be reset upward when it is pushed up. In addition, since the through hole 2-2 of this embodiment can be allowed to have a small amount of deviation on the symmetrical center line of the slot slide 1-1, it can meet the requirements, so the processing accuracy requirements are lower and the processing difficulty is small.

[0066] Furthermore, a reset pin 6 is installed on the hammer 3; the reset pin 6 is slidably matched with the through slot 2-1 and the limit slot 1-1 (jointly guided). In this way, in the power accumulation stage, the reset pin 6 and the firing pin 5 of this embodiment are simultaneously guided and slid with the limit slot 1-1, which can prevent the main sleeve 1, the firing sleeve 2 and the hammer 3 from rotating relative to each other. Compared with the separate guidance in the prior art (i.e., the second problem in the background technology), this embodiment can reduce the matching error and improve the precision, stability and reliability of the movement. In the reset stage, the reset pin 6 of this embodiment is guided and slid with the limit slot 1-1, and the reset pin 6 and the firing pin 5 are simultaneously slidably matched with the slot slide 1-1, which can also prevent the main sleeve 1, the firing sleeve 2 and the hammer 3 from rotating relative to each other. Compared with the prior art, the matching error can be reduced and the precision, stability and reliability of the movement can be improved.

[0067] Furthermore, the reset pin 6 is detachably mounted on the hammer 3. In this embodiment, the reset pin 6 is inserted on the hammer 3 and is perpendicular to each other, and both ends of the reset pin 6 extend out of the side wall of the hammer 3.

[0068] In this embodiment, two through slots 2-1 are provided on the firing sleeve 2 along the circumferential direction, and a through hole 2-2 is provided at the rear end of one of the through slots 2-1. The upper and lower ends of the reset pin 6 are respectively inserted into the two through slots 2-1. Preferably, the outer diameter D4 of the reset pin 6 is slightly smaller than the width S1 of the through slot 2-1 (for example, the matching clearance is preferably less than 1 mm).

[0069] In this embodiment, two limiting grooves 1-1 are provided in the main sleeve 1; and the firing surface 1-2 is provided at the rear end of one of the limiting grooves 1-1. The upper and lower ends of the reset pin 6 are respectively inserted into the two limiting grooves 1-1. Preferably, the outer diameter D4 of the reset pin 6 is slightly smaller than the width S2 of the limiting groove 1-1 (for example, the matching clearance is preferably less than 1 mm).

[0070] In order to reduce the friction and impact generated when contacting the firing surface 1-2, the top surface 5-11 of the upper part 5-1 is mushroom-shaped or spherical arc-shaped.

[0071] The reset pin 6 of this embodiment is arranged parallel to the firing pin 3 and distributed along the center line direction of the firing sleeve 2. When in use, the waste materials dropped from the nails can be discharged downward from the through groove 2-1 located at the lower position and the limit groove 1-1 located at the lower position on the firing sleeve 2, thereby avoiding malfunctions caused by the waste materials getting stuck.

[0072] Embodiment 2: This embodiment is basically the same as Embodiment 1, except that:

[0073] Furthermore, a plurality of through slots 2 - 1 are provided on the firing sleeve 2 along the circumferential direction, and through holes 2 - 2 are provided at the rear ends of at least two of the through slots 2 - 1 .

[0074] See also Figure 16-17 In this embodiment, two through slots 2-1 are symmetrically arranged along the circumferential direction on the firing sleeve 2, and through holes 2-2 are arranged at the rear ends of the two through slots 2-1. When the through hole 2-2 at the rear end of the original through slot 2-1 is worn or deformed after being used for a period of time, the firing pin 5 can be reversibly assembled to match the through hole 2-2 at the rear end of another through slot 2-1; then the firing sleeve 2 can continue to be used normally, and the service life is doubled without the need to replace the firing sleeve 2, and the maintenance cost is reduced.

[0075] Furthermore, a plurality of the limiting grooves 1 - 1 are provided on the main sleeve 1 ; and the firing surface 1 - 2 is provided at the rear ends of at least two of the limiting grooves 1 - 1 .

[0076] See also Fig.15 In this embodiment, two limit grooves 1-1 are symmetrically arranged on the main sleeve 1; and the firing surface 1-2 is arranged at the rear end of the two limit grooves 1-1. When the firing surface 1-2 at the rear end of the original limit groove 1-1 is worn or deformed after being used for a period of time, it can be reversibly assembled and then can continue to be used normally, which doubles the service life without the need to replace the main sleeve 1 and reduces the maintenance cost.

[0077] In other embodiments, four through slots 2-1 may be evenly arranged on the firing sleeve 2 along the circumferential direction, and through holes 2-2 are arranged at the rear ends of the four through slots 2-1 so that the four through slots 2-1 can be replaced at four locations.

[0078] In other embodiments, the main sleeve 1 may be provided with four limiting grooves 1-1 evenly arranged along the circumferential direction; and the firing surfaces 1-2 are provided at the rear ends of the four limiting grooves 1-1, which can be replaced at four locations.

[0079] Embodiment 3: This embodiment is basically the same as Embodiment 1 or 2, except that:

[0080] See also Fig.18Furthermore, the hammer 3 is provided with a firing pin mounting hole 3-1; the lower end of the firing pin mounting hole 3-1 is provided with a spring lower end positioning hole 3-2; the lower end of the firing pin 5 is provided with a spring upper end positioning hole 5-2; the two ends of the top spring 4 are respectively inserted into the spring lower end positioning hole 3-2 and the spring upper end positioning hole 5-3. The upper and lower ends of the top spring 4 are positioned to ensure that the upper and lower parts of the top spring 4 will not bend when the top spring 4 is compressed and extended, and can maintain linear compression and linear extension, thereby ensuring that the force of the firing pin 5 is stable.

[0081] Embodiment 4: This embodiment is basically the same as Embodiment 1, 2 or 3, except that:

[0082] See also Figure 19-20 Furthermore, the main sleeve 1 includes a main body sleeve 1a and an inner sleeve 1b; the inner sleeve 1b is detachably installed in the main body sleeve 1a; and the firing surface 1-2 is arranged on the inner sleeve 1b.

[0083] In this embodiment, the inner sleeve 1b is inserted into the main body sleeve 1a and the inner wall of the main body sleeve 1a is provided with a step stopper surface 1a-1 for limiting the rearward displacement of the inner sleeve 1b. During operation, since the firing surface 1-2 of the main sleeve 1 is the main force-bearing part, and the main body sleeve 1a and the inner sleeve 1b are separably connected in this embodiment, when the firing surface 1-2 of the main sleeve 1 is worn or deformed, only the inner sleeve 1b needs to be replaced, and the main body sleeve 1a is retained without the need for overall replacement, which can reduce maintenance costs.

[0084] In other embodiments, the inner sleeve 1b can be fixed in the main body sleeve 1a by threaded engagement.

[0085] Example 5: See Fig.21 , a nail shooter having a firing mechanism as described in any one of the above embodiments one to four.

[0086] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A firing mechanism, comprising a main sleeve (1), a firing sleeve (2) and a hammer (3), wherein a top spring (4) and a firing pin (5) are mounted on the hammer (3), a through slot (2-1) is provided on the firing sleeve (2); a through hole (2-2) is provided at the rear end of the through slot (2-1); a firing surface (1-2) is provided in the main sleeve (1), characterized in that: The outer diameter of the upper portion (5-1) of the firing pin (5) gradually decreases upward; The width of the through groove (2-1) is smaller than the outer diameter of the lower end of the upper part (5-1) and larger than the outer diameter of the upper end of the upper part (5-1); The inner diameter of the through hole (2-2) is greater than the outer diameter of the lower end of the upper part (5-1); The main sleeve (1) is provided with a limiting groove (1-1); the firing surface (1-2) is located at the rear end of the limiting groove (1-1); The width of the limiting groove (1-1) is smaller than the outer diameter of the lower end of the upper part (5-1) and larger than the outer diameter of the upper end of the upper part (5-1).

2. A firing mechanism according to claim 1, characterized in that: A reset pin (6) is installed on the hammer (3); the reset pin (6) is slidably matched with the through slot (2-1) and the limiting slot (1-1) at the same time.

3. A firing mechanism according to claim 2, characterized in that: The reset pin (6) is detachably mounted on the hammer (3).

4. A firing mechanism according to claim 1, characterized in that: The upper part (5-1) is in the shape of a cone, an ellipsoid or a spherical arc.

5. A firing mechanism according to claim 1, characterized in that: A plurality of through slots (2-1) are provided on the firing sleeve (2) along the circumferential direction, and through holes (2-2) are provided at the rear ends of at least two of the through slots (2-1).

6. A firing mechanism according to claim 1, characterized in that: A plurality of limiting grooves (1-1) are provided in the main sleeve (1) along the circumferential direction; and the firing surface (1-2) is provided at the rear ends of at least two of the limiting grooves (1-1).

7. A firing mechanism according to claim 1, characterized in that: The hammer (3) is provided with a firing pin mounting hole (3-1); the lower end of the firing pin mounting hole (3-1) is provided with a spring lower end positioning hole (3-2); the lower end of the firing pin (5) is provided with a spring upper end positioning hole (5-2); The two ends of the top spring (4) are respectively inserted into the spring lower end positioning hole (3-2) and the spring upper end positioning hole (5-2).

8. A firing mechanism according to any one of claims 1 to 7, characterized in that: The main sleeve (1) comprises a main body sleeve (1a) and an inner sleeve (1b); the inner sleeve (1b) is detachably mounted in the main body sleeve (1a); the limiting groove (1-1) and the firing surface (1-2) are arranged on the inner sleeve (1b).

9. A firing mechanism according to claim 8, characterized in that: The inner sleeve (1b) is inserted into the main body sleeve (1a), and the inner wall of the main body sleeve (1a) is provided with a step stop surface (1a-1) for limiting the rearward displacement of the inner sleeve (1b).

10. A nail shooter, characterized in that: A firing mechanism according to any one of claims 1 to 9.

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