Nail clamping eliminating structure of anti-idle nailing gun

Abstract

The utility model relates to the technical field of pneumatic nailing, in particular to a nail clamping eliminating structure of an anti-empty nailing gun, and aims to solve the problems that when the last nail is nailed by an existing anti-empty nailing gun, the nail is sometimes clamped, a user needs to repeatedly detach a gun head to clean the clamped nail, and the gun loses positive effects. When the last nail is hit, the trigger is pressed, the trigger collides with the inserting plate, the front end of the inserting plate is made to abut against the nail pushing plate to obliquely fall downwards, meanwhile, the nail obliquely falls downwards, and a nail cap does not correspond to a firing pin in a nail groove, so that the nail is clamped; according to the utility model, when the trigger is pressed by a hand, a nail is arranged in the gun, and a gap of 0.5-2 millimeters is kept between the inserting plate and the trigger. When the trigger is unlocked, separated from the hand and reset forwards, the distance between the rear portion of the trigger and the air valve column is kept to be 2-4 mm, the gap between the inserting plate and the trigger can be stabilized to be unchanged for a long time, and mutual collision is avoided all the time. And the effect that the nail is not clamped when the last nail is nailed by the air-defense nailing gun is achieved. The component is subjected to high quenching and hardening treatment, so that the wear resistance is enhanced, the component is simple, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to an air defense nail gun, in particular to a structure for eliminating nail jams in an air defense nail gun. Background Art

[0002] Pneumatic nail guns are widely used in industries such as home decoration and wood furniture manufacturing. Currently, there is an air defense nail gun on the market. After the nails in the nail magazine are used up, the trigger automatically locks to prevent dry firing. Although it is convenient for users, it can reduce nail gun wear and prevent dry firing holes on the board surface, which is beneficial to the beauty of furniture. However, the sales volume of the air defense nail gun is limited and not smooth because users say that nail jams occur, especially when quickly firing continuously until the last nail, sometimes getting jammed. The so-called nail jam means that the nail is blocked in the gun head and the striker cannot hit it out. One has to first remove the screw rod on the gun head with a wrench, then disassemble the upper cover of the gun head and use a sharp cone or pliers to remove the jammed nail, which is time-consuming, laborious, very troublesome, and hinders labor efficiency. Moreover, it is easy to damage the striker. Therefore, in order to avoid nail jams, a design has been developed that intentionally retains several nails in the nail magazine after the trigger is locked. This design is described in Chinese patent document CN202021834058·3, with a publication date of May 7, 2021, which discloses an air defense mechanism for a nail gun, including a housing. The front inner part of the housing is provided with a gun head. In front of the handle of the housing, a trigger handle is hinged. Behind the trigger handle, there is a trigger handle compression spring assembly for resetting the trigger handle. Above the gun head, there is a gun cover. Below the gun head, there is a fixed magazine. Inside the fixed magazine, there is a movable magazine. A guide block is clamped in a groove below the gun head. One side of the guide block is provided with a protrusion, which is clamped inside the top head above the movable magazine. The bottom of the top head is connected to a spring seat inside the movable magazine. Inside the guide block, there is a slot for inserting the front end of a limit block. The limit block is provided with a limit groove, and the limit groove is directly opposite the spring seat below. After the rear end of the limit block is bent downward, it abuts against the rear of the trigger handle. The limit block includes a vertical insertion part inserted into the slot of the guide block. The middle part of the vertical insertion part is provided with the limit groove. The rear of the vertical insertion part is connected to a horizontal part. The horizontal part passes through two limit posts on the housing and then bends downward to form a bent part. The bent part is inserted behind the trigger handle to limit the pressing of the trigger handle after the number of nails in the magazine is less than the specified number. The literature shows that several nails are retained in the nail magazine after the trigger is locked. Additionally, the structure is complex and increases the manufacturing cost.

[0003] Although leaving several nails in the nail box overcomes the problem of nail jamming, there are still drawbacks: when the gun body is in the vertical position to open the box and load nails, the remaining several nails may fall out, causing waste. If the nails are standing upright in the box, it will also hinder the loading of nails. In addition, there is an unsafe factor that accidentally pulling the trigger may fire the nails and cause injury. For example, if a bullet remains in a police pistol and cannot be fired, it is very unsafe. In short, both the nail-jamming gun and the gun with remaining nails are disliked by users and have no positive effects. Summary of the Invention

[0004] In view of the drawback that the anti-aircraft nail gun sometimes jams when firing the last nail in the prior art, the inventor has long studied and found that the reason for nail jamming is as follows: the pusher plate is pushed down obliquely by the insertion plate, and the last nail also falls obliquely downward accordingly. The nail cap disengages from the nail groove and is misaligned with the firing pin, so that the firing pin cannot hit the nail cap and the nail is stuck in the nail groove together with the nail cap. When the user fires the last nail and presses the trigger with the hand, the trigger collides with the rear end of the insertion plate, pushing the front end of the insertion plate to push the pusher plate down obliquely, causing the nail to fall obliquely accordingly. Especially when the gun body is in the vertical position to fire nails, the nail cap is more likely to fall obliquely out of the nail groove.

[0005] Regarding the insertion plate locking the trigger, technicians usually believe that the closer the insertion plate is to the trigger, the longer it inserts into the trigger when the nails are fired, the more firmly the trigger is locked, and the more stable the anti-aircraft firing function is, and it will not get out of control after long-term use. The inventor has found that the nail jamming of the anti-aircraft nail gun is also related to the above-mentioned common belief, conventional setting and technical prejudice.

[0006] The technical problem to be solved by the present utility model is to overcome the technical prejudice and the drawback that the existing anti-aircraft nail gun sometimes jams when firing the last nail, and to provide an anti-aircraft nail gun that does not jam, has the simplest structure, is more convenient to install, and the components are wear-resistant and not easily deformed after being subjected to high-temperature quenching and hardening treatment.

[0007] The technical solution proposed by the present utility model to solve the above problems is as follows: when there is only the last nail left in the gun head and not fired in the row of nails in the nail box, and the user holds and presses the trigger made of high-temperature quenched and hardened steel backward tightly to retract the air valve column into the housing, there is a gap between the rear end of the insertion plate made of high-temperature quenched and hardened steel and the trigger, and the width of the gap is 0.5-2 mm, so as to ensure that the trigger does not touch the insertion plate when firing the last nail and does not cause nail jamming due to the touch. The width of the gap is 0.5-2 mm. It is also necessary to combine the fact that after the trigger is released from the hand of the user, the spring pushes the trigger forward to reset, and the distance between the rear of the trigger and the air valve column is set to be 2-4 mm, so as to limit the effect of keeping the gap value between the trigger and the insertion plate stable. The rear end of the insertion plate passes through the fixing block and extends towards the trigger, and the fixing block is provided with a square hole for inserting the insertion plate. The trigger, pin shaft, and insertion plate are made wear-resistant and hard and not deformed after being subjected to high-temperature quenching and hardening treatment.

[0008] The slope angle of the nail pushing plate should be small. Using a small slope to push the plug board to shift can increase the shifting length, which is beneficial for the length of the plug board inserted into the trigger to firmly lock the trigger after the last nail is driven out.

[0009] The beneficial effects of the present utility model are as follows: By overcoming the unreasonable design that the plug board and the trigger of the existing anti-aircraft nail gun are in mutual contact without a proper gap, resulting in component collisions when driving the last nail and finally causing nail jams. The present utility model selects a gap of 0.5 - 2 mm between the plug board and the trigger, and a spacing of 2 - 4 mm between the trigger and the air valve column. The plug board is pushed with a small slope to increase the shifting distance of the plug board and firmly lock the trigger. The technical means adopted by the present utility model eliminates the drawback of nail jams sometimes when driving the last nail, provides convenience for users, reduces the wear of the nail gun, etc., and has a non-nail-jamming anti-aircraft nail gun with positive effects such as improving the working speed, increasing labor efficiency, and avoiding damage to the firing pin. The components are strengthened in hardness and wear resistance through high-temperature quenching and hardening treatment. Compared with related technologies, the present utility model also has the characteristics of the simplest structure, more convenient installation, and lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 、 Figure 2 is a schematic structural diagram of an anti-aircraft nail gun for eliminating nail jams.

[0011] In the figure, 1 is the finger in the state of pressing the trigger.

[0012] In the figure, 2 is the side view of the trigger.

[0013] In the figure, 3 is the air valve column behind the trigger.

[0014] In the figure, 4 is the housing around the air valve column.

[0015] In the figure, 5 is the plug board for locking the trigger.

[0016] In the figure, 6 is the distance gap of 0.5 - 2 mm from the plug board to the trigger.

[0017] In the figure, 7 is the trigger return spring.

[0018] In the figure, 8 is the spacing of 2 - 4 mm from the trigger to the air valve column.

[0019] In the figure, 9 is the fixed block cast-connected to the housing.

[0020] In the figure, 10 is the square opening of the fixed block for the plug board to pass through. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0021] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] Embodiment 1

[0023] As shown Figure 1-2 in the figure, a structure for eliminating nail jams in an air defense nail gun. When the row of nails in the nail magazine is driven until only the last one remains in the gun head and not driven, and when a person holds and presses the trigger 2 made of highly quenched and hardened steel backward, tightly pressing the air valve column 3 to retract into the housing 4, there is a gap 6 between the rear end of the plug plate 5 made of highly quenched and hardened steel and the trigger 2. The width of the gap 6 is set to 0.5 - 2 mm, so that when driving the last nail, the trigger 2 does not touch the rear end of the plug plate 5, eliminating the nail jam caused by the touch. The width of the gap 6 is 0.5 - 2 mm. It is also necessary to combine with the situation that after the trigger 2 is released from the human hand 1, the spring 7 pushes the trigger 2 forward to reset, and the distance between the rear of the trigger 2 and the top of the air valve column 3 is set to a spacing 8 of 2 - 4 mm in length, which is used to keep the width of the gap 6 between the plug plate 5 and the trigger stable and unchanged. The plug plate 5 passes through the fixed block 9 and can move towards the trigger 2. The fixed block 9 is connected to the housing 4, and a square hole 10 is drilled in the fixed block 9. A row of straight nails in the nail magazine is pushed towards the gun head. When pressing the trigger 2 with the hand to compress the air valve column 3 to retract before driving the last nail, the striker head exposes the gun head nozzle, and the last nail is located at the edge of the nail groove in the gun head. In this state, determine the appropriate distance between the rear end of the plug plate 5 and the trigger 2, with the gap 6 of 0.5 - 2 mm as the standard, and determine the appropriate distance between the rear of the trigger 2 and the top of the air valve column 3 with 2 - 4 mm as the standard. Determine the position of the contact point between the front end of the plug plate 5 and the slope angle of the nail pushing plate; determine the position of the hole drilled for the trigger 2 on the housing; only when these components are coordinated with each other can it be achieved that there is no nail jam when driving the last nail. Since the hole for the trigger 2 will be worn larger during the nail driving operation over time, and the corresponding pin shaft of the trigger 2 will also be worn thinner, it is easy for the upper end of the trigger 2 to shift forward during pressing, shortening the distance between the trigger 2 and the plug plate 5. To prevent the shortening of the distance, it is necessary to perform a highly quenched and hardened treatment on the components to increase the hardness and enhance the wear resistance. The fixed block 9 is integrally connected to the housing by casting, and a square hole 10 is drilled during processing in the workshop for the plug plate to pass through the fixed block and align with the trigger 2.

[0024] Figure 1 、 Figure 2 The rear end of the plug plate 5. The front end has a bent right angle upwards; the front end of the plug plate leans against the gun head. When the nail pushing plate approaches the gun head as the nails are driven, the slope angle of the nail pushing plate contacts and slides with the front end of the plug plate. The front end is well-known to those of ordinary skill in the art, so the specification does not show unnecessary drawings.

[0025] A slope angle is provided at the upper corner of the nail pushing plate located in the nail magazine towards the trigger 2. The slope angle cooperates with the front end of the plug plate 5, and the slope angle of the nail pushing plate pushes the plug plate 5 to shift and lock the trigger 2. The slope of the slope angle of the nail pushing plate should be small. Using a small slope to push the plug plate 5 to move can increase the displacement length, which is beneficial for the plug plate 5 to extend sufficiently into the trigger 2 after the last nail is driven out, so as to firmly lock the trigger 2.

[0026] The contact point and function between the staple pushing plate and the front end of the inserting plate 5 in preventing misfiring are well-known to those of ordinary skill in the art. Therefore, it is not necessary to repeat the description in this embodiment. Other structures not described in the specification are well-known to those of ordinary skill in the art. Therefore, it is not necessary to repeat the description for this utility model.

[0027] The above has schematically described the present utility model and its implementation manners. The actual description and structure are not limited thereto. Therefore, any modifications and improvements made by those of ordinary skill in the art inspired thereby shall be included within the protection scope of the present utility model.

Claims

1. A structure for eliminating stuck nails in an anti-air nail gun, comprising a plug plate and a trigger, characterized in that: When only the last nail in the nail box is driven in and remains in the gun head, and a person holds the highly quenched and hardened trigger and presses the valve column backward to retract the valve column into the shell, there is a gap between the rear end of the highly quenched and hardened plug plate and the trigger, and the width of the gap is 0.5 to 2 mm to ensure that the trigger does not touch the plug plate when the last nail is driven in, thereby preventing the nail from getting stuck.

2. The structure for eliminating stuck nails of an anti-air nail gun according to claim 1, characterized in that: The width of the gap is 0.5 to 2 mm. After the trigger is released from the hand, the spring pushes the trigger forward to reset. The distance between the back of the trigger and the valve column is set to 2 to 4 mm to limit the gap value between the trigger and the plug plate to remain stable.

3. The structure for eliminating stuck nails of an anti-air nail gun according to claim 1, characterized in that: The rear end of the plugging plate passes through the fixing block and extends toward the trigger, and the fixing block has a square opening for passing the plugging plate.

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