A nail gun cartridge anti-firing safety protection device and nail gun

Abstract

The application discloses a nail gun cartridge anti-firing safety protection device, which comprises a striker, a lifting driving wheel, an anti-firing one-way ratchet and a pawl. The striker is provided with a rack, the lifting driving wheel comprises a lifting section and a release section, the lifting section is provided with a plurality of lifting pins capable of being sequentially engaged with the rack and used for driving the striker to move in a force storage direction; after the lifting pins are disengaged from the rack, the striker is released and moves in a firing direction. The anti-firing one-way ratchet is coaxially and drivingly connected with the lifting driving wheel and cooperates with the pawl to allow the lifting driving wheel to rotate in the lifting direction and restrict reverse rotation thereof. When the striker does not complete the firing stroke due to the cartridge, the lifting driving wheel continues to rotate, so that the lifting pins are re-engaged with the rack; after the cartridge is removed, the anti-firing one-way ratchet and the pawl restrict reverse rotation of the lifting driving wheel, thereby restricting the striker from continuously moving in the firing direction. The application can reduce the risk of accidental firing of the striker when the cartridge is removed and improve the use safety of the nail gun.

Description

Technical Field

[0001] This invention relates to nail guns, and more particularly to a nail gun jamming and anti-firing safety protection device. Background Technology

[0002] A nail gun is a tool that uses a firing pin to strike nails, driving them into wood, walls, or other workpieces. It is widely used in construction, furniture manufacturing, decoration, and wood processing. Depending on the power source, nail guns can be classified as pneumatic nail guns, electric nail guns, and gas-powered nail guns.

[0003] One type of existing nail gun is equipped with a drive mechanism, an energy storage mechanism, a firing pin, a nail feeding mechanism, and a nail feeding channel. When the nail gun is working, the drive mechanism drives the firing pin to move in the energy storage direction, causing the energy storage mechanism such as the spring and compressed gas to store energy; after the firing pin reaches the predetermined position, it is released and moves rapidly in the firing direction under the action of the energy storage mechanism, thereby striking the nail that has entered the nail feeding channel and ejecting the nail from the nail gun's exit position.

[0004] As the power of nail guns increases, the kinetic energy of the firing pin during firing and the energy stored in the energy storage mechanism also increase accordingly, which places higher demands on safety protection during the use of nail guns.

[0005] In actual use, factors such as nail misalignment, nail deformation, abnormal nail feeding posture, mismatch between the nail and the nail feeding channel, or the presence of foreign objects in the nail feeding channel can cause the nail to become stuck in the nail feeding channel. When this happens, the stuck nail will prevent the firing pin from continuing to move in the firing direction, preventing it from reaching the end of its normal firing stroke. At this time, the accumulator mechanism may still contain energy, and the firing pin may still have a tendency to continue moving in the firing direction.

[0006] To restore the nail gun to normal operation, the user typically needs to open the relevant part of the nail gun and remove the nail stuck in the nail feed channel. When nail jamming occurs before the firing pin has completed its firing stroke and the accumulator is still in a high-energy state, the jammed nail effectively obstructs the firing pin. Once the user removes the nail, the firing pin may suddenly lose its obstruction and continue to move rapidly in the firing direction, driven by the remaining energy of the accumulator. This sudden movement of the firing pin may eject nails, broken nails, or other foreign objects in the nail feed channel, potentially causing injury to the user performing troubleshooting operations or nearby personnel.

[0007] The trigger safety and pressure plate safety mechanisms used in existing nail guns are typically designed to prevent the nail gun from being triggered when it is not in contact with a workpiece or when the trigger is not operated. Their primary function is to ensure the normal firing process of the nail gun. However, if the nail gun has already executed the firing action and the firing pin is stuck in the middle of its firing stroke due to nail jamming, these safety mechanisms are usually insufficient to prevent the firing pin from completing the remaining firing stroke after the nail is removed.

[0008] Especially for high-powered nail guns with high firing pin energy, the safety risk posed by the firing pin continuing to fire unexpectedly when the jammed nail is removed is even more prominent. Therefore, how to prevent the firing pin from continuing to move in the firing direction due to the sudden loss of obstruction after the nail jams, especially during the user's removal of the jammed nail, is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0009] In view of the aforementioned deficiencies in the prior art, one object of this application is to provide a nail gun jamming prevention safety protection device, which, in the event of nail jamming and the firing pin not completing its firing stroke, restricts the firing pin from continuing to move in the firing direction after the jammed nail is removed, reducing the risk that the firing pin may accidentally complete the remaining firing stroke due to the sudden loss of the jammed nail's obstruction, thereby improving the safety of the nail gun when troubleshooting jammed nails. Another object of this application is to provide a nail gun equipped with the aforementioned nail jamming prevention safety protection device.

[0010] To achieve the above objectives, the first aspect of this application provides a nail gun anti-firing safety protection device, including a firing pin, a lifting drive wheel, an anti-firing one-way ratchet, and a pawl.

[0011] The firing pin is equipped with a rack.

[0012] The lifting drive wheel includes a lifting section and a releasing section arranged along its rotation direction. The lifting section is provided with a plurality of lifting pins for sequentially engaging with the rack. When the lifting drive wheel rotates along the lifting direction, the lifting pins drive the firing pin to move along the power storage direction through the rack, and allow the firing pin to move along the firing direction after the lifting pins disengage from the rack.

[0013] The anti-firing one-way ratchet is coaxially connected to the lifting drive wheel, and the pawl engages with the anti-firing one-way ratchet. The anti-firing one-way ratchet and the pawl are configured to allow the lifting drive wheel to rotate in the lifting direction and restrict the lifting drive wheel from rotating in the opposite direction to the lifting direction, so as to restrict the movement of the firing pin in the firing direction when the firing stroke of the firing pin is not completed due to jamming and the lifting pin re-engages with the rack.

[0014] Using the above technical solution, when the nail gun is working normally, the lifting drive wheel rotates in the lifting direction, and multiple lifting pins located in the lifting section engage sequentially with the rack on the firing pin, thereby driving the firing pin to move in the power storage direction. As the lifting drive wheel continues to rotate, the lifting pins in the lifting section disengage from the rack, and when the release section rotates to the side where the rack is located, the firing pin is released and moves in the firing direction.

[0015] When a nail gets stuck in the nail feed channel of the nail gun, the firing pin is blocked by the stuck nail and cannot complete the firing stroke. As the lifting drive wheel continues to rotate in the lifting direction, the lifting section of the lifting drive wheel rotates again to the side where the rack is located, and at least one lifting pin re-engages with the rack on the firing pin.

[0016] At the moment the user removes the bolt, the firing pin, due to its remaining stored energy, tends to continue moving in the firing direction. This tendency is transmitted to the lifting drive wheel via the rack and pin, causing it to rotate in the opposite direction. At this point, the anti-firing one-way ratchet and pawl engage, preventing the lifting drive wheel from rotating in the opposite direction. This, in turn, restricts the firing pin's movement in the firing direction via the meshing lifting pin and rack, thus preventing the firing pin from completing the remaining firing stroke immediately after the bolt is removed.

[0017] In some embodiments, a plurality of lifting pins are spaced apart circumferentially along the lifting drive wheel and are each capable of meshing with teeth on the rack. When the lifting drive wheel rotates in the lifting direction, the plurality of lifting pins sequentially push the rack, enabling the striking pin to move continuously in the power storage direction.

[0018] In some embodiments, the release section is not provided with a lifting pin for engaging the rack. When the release section rotates to the side where the rack is located, the lifting drive wheel releases the lifting constraint on the firing pin, allowing the firing pin to move in the firing direction under the action of the stored energy.

[0019] In some embodiments, the lifting section and the releasing section each correspond to a half-circumferential region of the lifting drive wheel. The lifting section constitutes a lifting half-circumference, and the releasing section constitutes a releasing half-circumference.

[0020] In other embodiments, the central angles corresponding to the lifting section and the releasing section can be set according to the charging stroke of the firing pin, the length of the rack, the number of lifting pins and the distribution position of the lifting pins, and are not limited to occupying half a circle of the circumference of the lifting drive wheel respectively.

[0021] In some embodiments, the anti-firing one-way ratchet is fixedly connected to the lifting drive wheel, or the anti-firing one-way ratchet is integrally formed with the lifting drive wheel, so that the anti-firing one-way ratchet and the lifting drive wheel rotate synchronously.

[0022] In some embodiments, the pawl is elastically pressed against the anti-firing one-way ratchet. When the anti-firing one-way ratchet rotates in the lifting direction, the ratchet teeth of the anti-firing one-way ratchet can sequentially pass over the pawl; when the anti-firing one-way ratchet has a tendency to rotate in the opposite direction to the lifting direction, its ratchet teeth and pawl form a stop engagement.

[0023] In some embodiments, the anti-firing safety protection device for the bolt also includes an energy storage mechanism that drives the firing pin. When the lifting drive wheel drives the firing pin to move in the energy storage direction, the firing pin causes the energy storage mechanism to store energy; after the lifting pin disengages from the rack, the energy storage mechanism releases the stored energy to drive the firing pin to move in the firing direction.

[0024] In some embodiments, the energy storage mechanism includes a spring and / or a gas storage chamber. As the firing pin moves in the storage direction, it compresses the gas in the spring and / or the gas storage chamber to store energy for driving the firing pin in the firing direction.

[0025] The second aspect of this application provides a nail gun, including a housing, a nail feeding mechanism, a nail feeding channel, a drive mechanism, and any one of the aforementioned nail jamming and anti-firing safety protection devices.

[0026] The firing pin is movably disposed within the housing for firing nails that enter the nail feeding channel. The lifting drive wheel is tractively connected to the drive mechanism to rotate in the lifting direction under the drive of the drive mechanism.

[0027] When the firing stroke of the firing pin is not completed due to the jamming pin, the lifting drive wheel continues to rotate in the lifting direction, causing at least one lifting pin in the lifting section to re-engage with the rack on the firing pin. The anti-firing one-way ratchet and the pawl restrict the movement of the firing pin in the firing direction after the jamming pin is removed by limiting the reverse rotation of the lifting drive wheel.

[0028] In some embodiments, the drive mechanism includes a motor that directly drives the lifting drive wheel to rotate, or drives the lifting drive wheel to rotate through an intermediate transmission structure such as a gear transmission mechanism.

[0029] This application utilizes the cooperation of an anti-firing one-way ratchet and a pawl to restrict the reverse rotation of the lifting drive wheel after a nail jams and the lifting pin re-engages with the firing pin's rack. This restricts the firing pin from continuing to move in the firing direction when removing the jammed nail, preventing the firing pin from suddenly completing the remaining firing stroke and reducing the risk of accidental firing and injury. At the same time, it does not affect the normal charging and firing of the nail gun, and has the advantages of simple structure and high safety.

[0030] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the nail gun jamming anti-firing safety protection device in the embodiments of this application; Figure 2 This is a schematic diagram of the structure when the lifting pin of the lifting drive wheel meshes with the rack of the impact pin in an embodiment of this application; Figure 3 This is a schematic diagram of the structure when the lifting pin of the lifting drive wheel disengages from the rack of the impact pin in an embodiment of this application; Figure 4 This is a schematic diagram of the engagement structure of the anti-firing one-way ratchet and pawl in an embodiment of this application.

[0032] Figure label: 1. Firing pin; 11. Gear rack; 2. Lift the drive wheel; 21. Lift the pin; 3. Anti-shot one-way ratchet; 4. Claws. Detailed Implementation

[0033] The following description, with reference to the accompanying drawings, illustrates several preferred embodiments of the present invention to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0034] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and the present invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0035] The technical solution of this application will be further described in detail below with reference to the accompanying drawings. It should be noted that the following embodiments are only used to illustrate this application and are not intended to limit the scope of protection of this application. Conventional changes or substitutions in structural form, connection method, or positional relationship made by those skilled in the art based on the following embodiments without departing from the concept of this application should all fall within the scope of protection of this application.

[0036] In the description of this application, terms such as "front," "back," "up," "down," "clockwise," and "counterclockwise" are used to describe the orientation or movement direction of the components shown in the accompanying drawings. They are only for the purpose of explaining this application and simplifying the description, and are not intended to indicate or imply that the device or component involved must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] like Figures 1 to 4As shown, this embodiment provides a nail gun jamming anti-firing safety protection device, which includes a firing pin 1, a lifting drive wheel 2, an anti-firing one-way ratchet 3, and a pawl 4.

[0038] The firing pin 1 can reciprocate along the charging direction and the firing direction opposite to the charging direction. The firing pin 1 is used to strike the nail located in the nail feed channel of the nail gun during the firing stroke, causing the nail to be ejected from the nail exit position of the nail gun. The firing pin 1 is provided with a rack 11, which includes multiple teeth arranged sequentially along the movement direction of the firing pin 1. The rack 11 is used to cooperate with the lifting drive wheel 2, enabling the lifting drive wheel 2 to drive the firing pin 1 to move along the charging direction.

[0039] The firing pin 1 also engages with the energy storage mechanism of the nail gun. The energy storage mechanism stores energy as the firing pin 1 moves in the charging direction and drives it to move in the firing direction after the firing pin 1 is released. In one embodiment, the energy storage mechanism may include a spring. When the firing pin 1 moves in the charging direction, the spring is compressed, causing elastic deformation and storing elastic potential energy. When the firing pin 1 is released, the spring releases the stored elastic potential energy, thereby driving the firing pin 1 to move rapidly in the firing direction. In another embodiment, the energy storage mechanism may also include a gas storage chamber. When the firing pin 1 moves in the charging direction, the gas in the gas storage chamber is directly or indirectly compressed to store energy. When the firing pin 1 is released, the compressed gas in the gas storage chamber expands and drives the firing pin 1 to move in the firing direction. The energy storage mechanism may also be a combination of a spring and a gas storage chamber.

[0040] The lifting drive wheel 2 is rotatably mounted inside the nail gun and is connected to the nail gun's drive mechanism. The drive mechanism may include a motor, which directly or through an intermediate transmission structure such as a gear transmission mechanism drives the lifting drive wheel 2 to rotate. In the embodiment shown in the accompanying drawings, the motor drives the lifting drive wheel 2 to rotate counterclockwise, which is the lifting direction of the lifting drive wheel 2.

[0041] like Figure 2 and Figure 3 As shown, the lifting drive wheel 2 includes a lifting section and a releasing section along its circumference. In this embodiment, the lifting section is a half-turn of lifting the lifting drive wheel 2 in the circumferential direction, and the releasing section is a half-turn of releasing the lifting drive wheel 2 in the circumferential direction. Multiple lifting pins 21 are provided within the lifting section, and these multiple lifting pins 21 are distributed at intervals along the circumference of the lifting drive wheel 2. Each lifting pin 21 can move along an arc trajectory with the lifting drive wheel 2 and can sequentially engage with the rack 11 on the firing pin 1.

[0042] When the lifting drive wheel 2 rotates counterclockwise, causing its lifting section to rotate to the side where the rack 11 is located, multiple lifting pins 21 sequentially engage with the rack 11. As the lifting drive wheel 2 continues to rotate, the engaged lifting pins 21 push the corresponding teeth on the rack 11 along an arc trajectory, thereby driving the striker 1 to move in the energy storage direction via the rack 11. During the movement of the striker 1 in the energy storage direction, the energy storage mechanism that is driven and coordinated with the striker 1 gradually stores energy.

[0043] Multiple lifting pins 21 are arranged circumferentially along the lifting drive wheel 2 to match multiple teeth on the rack 11, so that adjacent lifting pins 21 can sequentially push the rack 11. When one lifting pin 21 gradually disengages from the rack 11, another lifting pin 21 located behind it can engage with the rack 11, thereby enabling the striker 1 to continuously move in the power storage direction within the lifting section.

[0044] No lifting pin 21 for engaging with rack 11 is provided in the release section. As the lifting drive wheel 2 continues to rotate counterclockwise until the last lifting pin 21 in the lifting section disengages from rack 11, the release section rotates to the side where rack 11 is located. At this point, the lifting drive wheel 2 no longer constrains rack 11 through lifting pin 21, and the firing pin 1 is thus released. The energy storage mechanism releases the previously stored energy, driving the firing pin 1 to move rapidly in the firing direction, causing the firing pin 1 to enter the firing stroke and strike the nail located in the nail feeding channel.

[0045] The anti-firing one-way ratchet 3 is coaxially arranged with the lifting drive wheel 2 and is connected to the lifting drive wheel 2 for transmission, so that the anti-firing one-way ratchet 3 can rotate synchronously with the lifting drive wheel 2. The anti-firing one-way ratchet 3 can be fixedly mounted on the rotating shaft of the lifting drive wheel 2, or it can be fixedly connected to the lifting drive wheel 2 or integrally formed. As long as the anti-firing one-way ratchet 3 and the lifting drive wheel 2 can maintain synchronous rotation, the corresponding function of this application can be realized.

[0046] Pawl 4 is located on one side of the anti-firing one-way ratchet 3 and engages with the ratchet teeth of the anti-firing one-way ratchet 3. Pawl 4 can abut against the outer periphery of the anti-firing one-way ratchet 3 under the action of the elastic element. The anti-firing one-way ratchet 3 and pawl 4 together constitute a one-way anti-reverse mechanism, which allows the lifting drive wheel 2 to rotate in the lifting direction and restricts the lifting drive wheel 2 from rotating in the opposite direction to the lifting direction.

[0047] Specifically, such as Figure 4As shown, when the lifting drive wheel 2 rotates counterclockwise under the drive mechanism, the anti-firing one-way ratchet 3 rotates counterclockwise along with the lifting drive wheel 2. Each ratchet tooth of the anti-firing one-way ratchet 3 sequentially pushes away the pawl 4, allowing the anti-firing one-way ratchet 3 to override the pawl 4. After the pawl 4 passes one ratchet tooth, it re-abuts against the anti-firing one-way ratchet 3 under elastic action. Therefore, the pawl 4 does not hinder the normal rotation of the lifting drive wheel 2 in the lifting direction, nor does it affect the lifting drive wheel 2's ability to drive the firing pin 1 through the lifting pin 21 to complete the power accumulation process.

[0048] When the lifting drive wheel 2 tends to rotate clockwise, the anti-firing one-way ratchet 3 also tends to rotate clockwise. At this time, the corresponding ratchet teeth of the anti-firing one-way ratchet 3 and the pawl 4 form a stop engagement, and the pawl 4 prevents the anti-firing one-way ratchet 3 from continuing to rotate clockwise. Since the anti-firing one-way ratchet 3 rotates synchronously with the lifting drive wheel 2, the clockwise rotation of the lifting drive wheel 2 is also correspondingly restricted.

[0049] The normal firing process of this embodiment will be described below.

[0050] When the nail gun is working normally, the motor drives the lifting drive wheel 2 to rotate counterclockwise. When the lifting section of the lifting drive wheel 2 rotates to the side where the rack 11 of the firing pin 1 is located, multiple lifting pins 21 set in the lifting section engage with the rack 11 in sequence, and push the firing pin 1 to move in the energy storage direction. During this process, the firing pin 1 causes the energy storage mechanism to gradually store energy.

[0051] When the lifting drive wheel 2 continues to rotate until the last lifting pin 21 in the lifting section disengages from the rack 11, the release section of the lifting drive wheel 2 enters the side where the rack 11 is located. Since there is no lifting pin 21 in the release section, the firing pin 1 is no longer subject to the lifting constraint of the lifting drive wheel 2. The energy storage mechanism releases energy and drives the firing pin 1 to move rapidly along the firing direction. The firing pin 1 strikes the nail in the nail feeding channel, causing the nail to be fired normally. After completing its firing stroke, the firing pin 1 reaches the end position of its firing stroke.

[0052] During normal operation, the anti-firing one-way ratchet 3 rotates counterclockwise with the lifting drive wheel 2 and overrides the pawl 4. Therefore, the anti-firing one-way ratchet 3 and the pawl 4 do not obstruct the rotation of the lifting drive wheel 2 in the normal lifting direction.

[0053] The following explains the safety protection process when a jamming occurs.

[0054] During the use of a nail gun, nails may become stuck in the nail feeding channel due to improper positioning, abnormal nail feeding posture, or foreign objects within the feeding channel. When the firing pin 1 strikes the stuck nail in the firing direction, the stuck nail hinders the firing pin 1 from continuing to move, preventing the firing pin 1 from reaching the end of its firing stroke; that is, the firing stroke of the firing pin 1 is not fully completed. At this time, the energy storage mechanism may still contain a large amount of energy, and the firing pin 1 still has the tendency to continue moving in the firing direction.

[0055] With the firing pin 1 stuck in the middle position due to the jamming pin, the lifting drive wheel 2 continues to rotate counterclockwise under the action of the drive mechanism. After the lifting drive wheel 2 passes the release section, its lifting section rotates again to the side where the rack 11 is located, and at least one lifting pin 21 in the lifting section re-engages with the rack 11 on the firing pin 1.

[0056] After the lifting pin 21 re-engages with the rack 11, the transmission relationship is re-established between the firing pin 1, the rack 11, and the lifting drive wheel 2. At this time, if the user removes the nail stuck in the nail supply channel, although the firing pin 1 has a tendency to move in the firing direction due to the remaining energy in the energy storage mechanism, the movement of the firing pin 1 in the firing direction will push the lifting pin 21, which is engaged with it, through the rack 11, and cause the lifting drive wheel 2 to rotate in a clockwise direction.

[0057] When the lifting drive wheel 2 begins to rotate clockwise, the anti-firing one-way ratchet 3, which is synchronously configured with the lifting drive wheel 2, also begins to rotate clockwise. The ratchet teeth of the anti-firing one-way ratchet 3 then engage with the pawl 4 to stop it, and the pawl 4 restricts the anti-firing one-way ratchet 3 from continuing to rotate clockwise, thereby restricting the lifting drive wheel 2 from rotating clockwise. Since the lifting pin 21 on the lifting drive wheel 2 remains engaged with the rack 11 of the firing pin 1, the reverse rotation restriction on the lifting drive wheel 2 is further transmitted to the firing pin 1, thereby restricting the firing pin 1 from continuing to move in the firing direction.

[0058] The anti-firing one-way ratchet 3 moves at most to the position where the adjacent ratchet tooth and pawl 4 form a stop during reverse rotation. Therefore, even if the firing pin 1 undergoes a certain degree of displacement when removing the catch pin, its displacement along the firing direction is limited, and it cannot complete the entire firing stroke under the drive of the energy storage mechanism. This prevents the firing pin 1 from suddenly losing its obstruction and moving directly to the end of the firing stroke the moment the user removes the catch pin, and also prevents the firing pin 1 from accidentally ejecting the catch pin or other foreign objects.

[0059] This embodiment uses a lifting pin 21 on the lifting drive wheel 2 that engages with the rack 11 of the firing pin 1. A one-way anti-reverse mechanism is formed by a ratchet 3 and a pawl 4 that rotate synchronously with the lifting drive wheel 2. This allows the lifting drive wheel 2 to rotate in the normal lifting direction while restricting its rotation in the opposite direction. When a nail jams and the lifting pin 21 re-engages with the rack 11, the one-way anti-reverse mechanism utilizes the existing transmission relationship between the lifting drive wheel 2 and the firing pin 1 to restrict the movement of the firing pin 1 in the firing direction. Therefore, regardless of the nail's position in the nail feeding channel, as long as the lifting pin 21 and rack 11 re-engage, the firing displacement of the firing pin 1 can be restricted when the user removes the jammed nail, improving the safety of the nail gun when troubleshooting nail jams.

[0060] In other embodiments, the lifting section and the release section do not necessarily each occupy half a circle of the lifting drive wheel upwards. The central angles corresponding to the lifting section and the release section can be adjusted according to factors such as the charging stroke of the firing pin 1, the length of the rack 11, and the number and distribution of the lifting pins 21. As long as the lifting pins 21 in the lifting section can drive the firing pin 1 to complete the required charging stroke, and the release section can provide the necessary firing space for the firing pin 1 after the lifting pins 21 disengage from the rack 11.

[0061] In other embodiments, the number of lifting pins 21, the spacing between adjacent lifting pins 21, and the mounting method of the lifting pins 21 on the lifting drive wheel 2 can also be set according to the tooth pitch of the rack 11, the charging stroke of the firing pin 1, and the output power of the nail gun. The lifting pins 21 can be integrally formed with the lifting drive wheel 2, or they can be fixedly mounted on the lifting drive wheel 2 as independent parts.

[0062] In other embodiments, the anti-firing one-way ratchet 3 is not limited to being directly mounted on the lifting drive wheel 2, as long as the anti-firing one-way ratchet 3 can rotate synchronously with the lifting drive wheel 2 or form a transmission relationship that cannot be reversed. The pawl 4 can also be a rotating pawl, a sliding pawl, or other structures that can form a one-way anti-reverse engagement with the anti-firing one-way ratchet 3.

[0063] This embodiment also provides a nail gun, which includes a housing, a nail feeding mechanism, a nail feeding channel, a driving mechanism, an energy storage mechanism, and the aforementioned nail jamming and anti-firing safety protection device.

[0064] The nail feeding mechanism is used to feed nails to be fired into the nail feeding channel. The firing pin 1 is reciprocally mounted within the housing and corresponds to the position of the nail feeding channel, so that when the firing pin 1 moves in the firing direction, it can strike the nails that have entered the nail feeding channel. The drive mechanism is connected to the lifting drive wheel 2 and is used to drive the lifting drive wheel 2 to rotate in the lifting direction. The lifting drive wheel 2 drives the firing pin 1 to store force through the lifting pin 21 and the rack 11, and releases the firing pin 1 after the lifting pin 21 disengages from the rack 11.

[0065] When the nail gun is working normally, the drive mechanism drives the lifting drive wheel 2 to rotate in the lifting direction, causing the firing pin 1 to complete the charging and firing process. When a nail gets stuck in the nail feeding channel and prevents the firing pin 1 from completing its firing stroke, the lifting drive wheel 2 continues to rotate, causing the lifting pin 21 in its lifting section to re-engage with the rack 11 of the firing pin 1. Afterwards, when removing the stuck nail, the anti-firing one-way ratchet 3 and pawl 4 restrict the lifting drive wheel 2 from rotating in the opposite direction, thereby restricting the movement of the firing pin 1 in the firing direction and preventing the firing pin 1 from suddenly completing the remaining firing stroke after the stuck nail is removed.

[0066] Therefore, nail guns equipped with the aforementioned nail anti-firing safety protection device can provide safety protection for the nail removal process without significantly affecting normal charging and firing actions, reducing the risk of accidental firing when removing nails.

[0067] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A nail gun anti-firing safety protection device, characterized in that, The device includes a firing pin, a lifting drive wheel, a one-way anti-firing ratchet, and a pawl. The firing pin is equipped with a rack. The lifting drive wheel includes a lifting section and a releasing section arranged along its rotation direction. The lifting section is equipped with multiple lifting pins that sequentially mesh with the rack. When the lifting drive wheel rotates in the lifting direction, the lifting pins drive the firing pin to move in the power storage direction via the rack, and allow the firing pin to move in the firing direction after the lifting pins disengage from the rack. The one-way anti-firing ratchet is coaxially connected to the lifting drive wheel. The pawl engages with the one-way anti-firing ratchet and is configured to allow the one-way anti-firing ratchet to rotate with the lifting drive wheel in the lifting direction, and to restrict the one-way anti-firing ratchet from rotating in the opposite direction to the lifting direction. This restricts the firing pin's movement in the firing direction when the firing stroke of the firing pin is not completed due to a jamming pin and the lifting pin re-engages with the rack.

2. The nail gun anti-firing safety protection device according to claim 1, characterized in that, The plurality of lifting pins are spaced apart circumferentially along the lifting drive wheel and are each capable of meshing with the teeth on the rack.

3. The nail gun anti-firing safety protection device according to claim 1, characterized in that, The release section is not provided with a lifting pin for engaging with the rack, so that when the release section rotates to the side where the rack is located, the firing pin can disengage from the lifting drive wheel and move in the firing direction.

4. The nail gun anti-firing safety protection device according to claim 1, characterized in that, The lifting section and the releasing section each correspond to a half-circle area on the circumference of the lifting drive wheel.

5. The nail gun anti-firing safety protection device according to claim 1, characterized in that, The anti-firing one-way ratchet is fixedly connected to the lifting drive wheel, or is integrally formed with the lifting drive wheel so that the two rotate synchronously.

6. The nail gun anti-firing safety protection device according to claim 1, characterized in that, The pawl is elastically pressed against the anti-firing one-way ratchet; when the anti-firing one-way ratchet rotates in the lifting direction, it passes over the pawl, and when it rotates in the opposite direction to the lifting direction, it engages with the pawl to stop.

7. The nail gun anti-firing safety protection device according to claim 1, characterized in that, It also includes an energy storage mechanism that works in conjunction with the firing pin drive. When the lifting drive wheel drives the firing pin to move in the energy storage direction, the energy storage mechanism stores energy for driving the firing pin to move in the firing direction.

8. The nail gun anti-firing safety protection device according to claim 7, characterized in that, The energy storage mechanism includes a spring and / or a gas storage chamber, and the striking pin compresses the gas in the spring and / or the gas storage chamber when it moves in the energy storage direction.

9. A nail gun, comprising a housing, a nail feeding mechanism, a nail feeding channel, a drive mechanism, and a nail jamming and anti-firing safety protection device, characterized in that, The anti-sparking safety protection device for nail jamming includes a firing pin, a lifting drive wheel, an anti-sparking one-way ratchet, and a pawl. The firing pin is movably disposed within the housing and is used to fire nails entering the nail supply channel. The firing pin is equipped with a rack. The lifting drive wheel is driven by the driving mechanism and includes a lifting section and a releasing section. The lifting section is provided with multiple lifting pins that can sequentially mesh with the rack to drive the firing pin to store force. The releasing section is used to allow the firing pin to move in the firing direction. The anti-sparking one-way ratchet is coaxially driven by the lifting drive wheel. The pawl cooperates with the anti-sparking one-way ratchet and is configured to allow the lifting drive wheel to rotate in the lifting direction and restrict the lifting drive wheel from rotating in the opposite direction, so as to restrict the movement of the firing pin in the firing direction when nail jamming occurs and the lifting pin re-engages with the rack.

10. The nail gun according to claim 9, characterized in that, The drive mechanism includes a motor for driving the lifting drive wheel to rotate along the lifting direction; when the firing stroke of the firing pin is not completed due to jamming, the lifting drive wheel continues to rotate along the lifting direction so that at least one lifting pin in the lifting section re-engages with the rack.

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