Electric nail gun and operation method thereof

Abstract

An electric nail gun comprises a body, a limiting mechanism, a driving mechanism, a driven mechanism, a magnetic attraction mechanism, a firing pin mechanism, a safety mechanism and a lithium battery box. When a user holds the body in use, the motor switch of the driving mechanism can be turned on, the rotating wheel driven by the motor is operated in advance to reach a preset rotating speed, once the trigger switch is turned on, the electromagnet can generate magnetic force to attract the shifting block to swing so as to be pushed by the driving block of the rotating wheel, and a synchronous rotating state of the belt pulley and the rotating wheel is temporarily formed; and the belt wheel is meshed to drive the belt to indirectly drive the striker mechanism to move so as to strike nails.

Description

Technical Field

[0001] The present invention relates to a nail gun, in particular to an electric nail gun and an operating method thereof. Background Art

[0002] Electric nail guns are available in plug-in and rechargeable lithium batteries. Other driving methods for electric nail guns include flywheel drive, compression spring, and internal storage of high-pressure gas. The currently known flywheel drive mechanism is to transfer the rotational kinetic energy of the flywheel to the slide seat at the moment of contact between the flywheel and the slide seat, thereby driving the firing pin to fire the nail and drive it into the target object. In the above process, in addition to energy loss when kinetic energy is transferred, it is also necessary to wait for the flywheel to reach the working speed, and the friction of the instantaneous contact also affects durability. Summary of the invention

[0003] The main technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide an electric nail gun and an operating method thereof, so that when a user uses it, the motor switch can be turned on when holding the main body, and the rotating wheel driven by the earlier operating motor can reach a preset speed. Once the trigger switch is turned on, the electromagnet can generate a magnetic force to attract the shift block to swing and be pushed by the driving block of the rotating wheel, temporarily forming a synchronous rotation state between the pulley and the rotating wheel, and the engagement of the pulley drives the belt to indirectly drive the striker mechanism to move to achieve the nailing action.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] An electric nail gun comprises a body, a limiting mechanism, an active mechanism, a passive mechanism, a magnetic mechanism, a firing pin mechanism, a safety mechanism and a lithium battery box, wherein: the body comprises a gun body, a grip, a butt and a nail box, the grip connects the gun body and the butt, the grip comprises a hand-holding area and a trigger area and are adjacent to each other, and the hand-holding area and the trigger area are respectively provided with a motor switch and a trigger switch; the gun body is provided with frame plates arranged at intervals; a gun head group is connected to one end of the gun body; the nail box connects the gun head group and the butt; the butt is provided with a power switch; the limiting mechanism comprises an initial rod and a final rod and are spaced apart between the frame, the final rod is closer to the gun head group than the initial rod; the passive mechanism is located between the frame and comprises a pulley, a steering wheel and a belt; the belt is wound around the steering wheel and the pulley, and the belt is in meshing contact with the pulley; the magnetic mechanism comprises an initial rod and a final rod and are spaced apart between the frame, the final rod is closer to the gun head group than the initial rod; the passive mechanism comprises a pulley, a steering wheel and a belt; the belt is wound around the steering wheel and the pulley, and the belt is in meshing contact with the pulley; the magnetic mechanism comprises an initial rod and a final rod and are spaced apart between the frame The suction mechanism includes an electromagnet and a shift block; the electromagnet is assembled on the outside of the frame plate and located in the plate hole of the frame plate, the shift block can be swingably arranged in the shift groove of the pulley, and the bottom of the shift groove is provided with a wheel hole corresponding to the plate hole of the frame plate and the magnetic suction end of the shift block; the active mechanism is located in the gun body part of the main body, the active mechanism includes a motor and a rotating wheel driven by the motor to rotate; the rotating wheel has a driving block facing the direction of the pulley; the firing pin mechanism includes a fixed seat and a firing pin, the fixed seat is fixed on the belt and located between the initial rod and the final rod, one end of the firing pin is fixed to the fixed seat, and the other end of the firing pin faces the direction of the gun head group; the safety mechanism is configured on the gun head group, the safety mechanism includes a safety switch and a safety slide bar; the lithium battery box is movably connected to the butt portion, and the lithium battery box is electrically connected to the motor, the electromagnet, the power switch, the motor switch, the safety switch and the trigger switch.

[0006] The operating method of the electric nail gun of the present invention comprises the following steps: a power switch turning on step, first turning on the power switch located at the butt portion of the main body; a motor switch turning on step, holding the hand-held area of ​​the main body and turning on the motor switch located at the hand-held area at the same time, so that the motor drives the rotating wheel and keeps rotating; a safety switch turning on step, after the electric nail gun is moved to the target object, the safety slide bar is abutted against the target object and synchronously slides on the gun head group to trigger the safety switch; and a trigger switch turning on step, turning on the trigger switch in the trigger area of ​​the grip portion, so that the electromagnet generates magnetic force to attract the shift block to swing, so that the protruding end portion of the shift block protrudes out of the shift groove of the pulley, and the protruding end is pushed by the driving block of the rotating wheel, so that the rotating wheel drives the pulley to rotate from the initial state, and the pulley synchronously engages to drive the belt, so that the firing pin mechanism moves from the initial position to the nailing position.

[0007] The beneficial effect of the present invention is that when the user uses it, the motor switch can be turned on when holding the main body, and the rotating wheel driven by the previously operated motor can reach a preset speed. Once the trigger switch is turned on, the electromagnet can generate a magnetic force to attract the shifting block to swing and be pushed by the driving block of the rotating wheel, temporarily forming a synchronous rotation state between the pulley and the rotating wheel, and the engagement of the pulley drives the belt to indirectly drive the firing pin mechanism to move to achieve the nail driving action. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0009] Figure 1 It is a combined stereogram of the present invention.

[0010] Figure 2 It is a partial enlarged view of the present invention with part of the main body omitted.

[0011] Figure 3 yes Figure 2 Part of the frame plate is omitted in the three-dimensional diagram.

[0012] Figure 4 It is a partial stereogram of the present invention.

[0013] Figure 5 It is a schematic diagram of turning on the power switch, the motor switch and the rotation of the wheel of the present invention.

[0014] Figure 6 It is a schematic diagram of the configuration of the passive mechanism and the magnetic attraction mechanism of the present invention.

[0015] Figure 7 yes Figure 6 The schematic diagram of the cross section of line segment VIIVII is shown.

[0016] Figure 8 It is a schematic diagram of the displacement of the safety slide bar and the opening of the trigger switch of the present invention.

[0017] Fig. 9 The schematic diagram is a diagram showing that the extended end of the shift block of the present invention protrudes out of the shift slot.

[0018] Fig.10 yes Fig. 9 Schematic diagram of the cross section of line segment XX shown.

[0019] Fig.11 This is a schematic diagram of the firing pin mechanism being moved toward the gun head assembly by the belt.

[0020] Fig.12 It is a schematic diagram of the position of the striker mechanism when it is displaced to the end-stroke rod.

[0021] Fig.13 It is a circuit configuration diagram of an electric nail gun.

[0022] Fig.14It is a partially exploded three-dimensional schematic diagram of another embodiment of the present invention.

[0023] Fig.15 It is a partial combined stereoscopic schematic diagram of another embodiment of the present invention.

[0024] Fig.16 It is an operation flow chart of an electric nail gun.

[0025] Description of the numbers in the figure:

[0026] Electric nail gun 1 body 100 motor switch 101 trigger switch 102 power switch 103 lithium battery box 104 spring 105 gun body 110 frame plate 111 plate hole 112 slide rail 113 pressure plate 114 tension rail 115 grip 120 hand holding area 121 trigger area 122 buttstock 130 nail magazine 140 gun head assembly 150 initial rod 210 final rod 220 pulley 310 shifting groove 311 wheel hole 312 steering wheel 320 belt 330 shield plate 340 shielding hole 341 chain 350 gear 360 electromagnet 410 shifting block 420 magnetic end 421 extending end 422 retracted surface 423 tilting surface 424 motor 510 rotating wheel 520 driving block 530 driving surface 531 fixing seat 610 Slide bar 611 striker 620 fixing plate 630 safety switch 710 safety slide bar 720

[0027] Turn on the power switch step S10

[0028] Turn on the motor switch step S20

[0029] Open the safety switch step S30

[0030] Turn on the trigger switch step S40 DETAILED DESCRIPTION

[0031] See also Figures 1 to 12 As shown, the figure discloses an electric nail gun 1, including a body 100, a limit mechanism, a passive mechanism, a magnetic attraction mechanism, an active mechanism, a striker mechanism, a safety mechanism and a lithium battery box 104, wherein:

[0032] The main body 100 includes a gun body 110, a handle 120, a buttstock 130 and a nail magazine 140. The handle 120 connects the gun body 110 and the buttstock. The handle 120 includes a hand-holding area 121 and a trigger area 122 which are adjacent to each other with a height difference. The hand-holding area 121 and the trigger area 122 are respectively provided with a motor switch 101 and a trigger switch 102. The gun body 110 is provided with frame plates 111 arranged at intervals. One end of the gun body 110 is connected with a gun head group 150. The nail magazine 140 connects the gun head group 150 and the buttstock 130. The buttstock 130 is provided with a power switch 103. The aforementioned main body 100 is generally composed of two shells combined with each other in two sides but does not include the nail magazine 140.

[0033] The limiting mechanism includes an initial rod 210 and a final rod 220 which are spaced apart from each other between the frame plate 111, and the final rod 220 is closer to the gun head assembly 150 than the initial rod 210; the periphery of the initial rod 210 and the final rod 220 is coated with an elastic body such as rubber or foam, so that the firing pin mechanism can be deformed and absorb the collision force under displacement collision to avoid direct structural damage.

[0034] The passive mechanism is located between the frame plates 111 and includes a pulley 310, a steering wheel 320 and a belt 330; the belt 330 is wound around the steering wheel 320 and the pulley 310, and the belt 330 is in meshing contact with the pulley 310; the belt 330 is a timing belt for example and can mesh with the outer peripheral side of the pulley 310, and the steering wheels 320 are two for example.

[0035] The magnetic attraction mechanism includes an electromagnet 410 and a shift block 420; the electromagnet 410 is assembled on the outside of the frame plate 111 and located in the plate hole 112 of the frame plate 111, the shift block 420 can be swingably set in the shift groove 311 of the pulley 310, and the bottom of the shift groove 311 is provided with a wheel hole 312 corresponding to the plate hole 112 of the frame plate 111 and the magnetic attraction end 421 of the shift block 420; the aforementioned shift block 420 is made of magnetic conductive material, and the shift block 420 is installed in the shift groove 311 position by a shaft, and the shift block 420 can rotate and swing relative to the shaft.

[0036] The active mechanism is located in the gun body 110 of the main body 100, and includes a motor 510 and a rotating wheel 520 driven by the motor 510 to rotate; the rotating wheel 520 has a driving block 530 facing the pulley 310; the aforementioned motor 510 is taken as an example of a motor that can reach more than 8000 revolutions (RPM).

[0037] The firing pin mechanism includes a fixing seat 610 and a firing pin 620 . The fixing seat 610 is fixed on the belt 330 and located between the initial rod 210 and the final rod 220 . One end of the firing pin 620 is fixed to the fixing seat 610 , and the other end of the firing pin 620 faces the direction of the gun head assembly 150 .

[0038] The safety mechanism is disposed on the gun head assembly 150 , and includes a safety switch 710 and a safety slide bar 720 .

[0039] The lithium battery box 104 is movably connected to the butt portion 130, and the lithium battery box 104 is electrically connected to the motor 510, the electromagnet 410, the power switch 103, the motor switch 101, the safety switch 710 and the trigger switch 102, see Fig.13 As shown, the power switch 103 , the motor switch 101 , the safety switch 710 and the trigger switch 102 are connected to the negative pole of the lithium battery box 104 .

[0040] In actual use, when the power switch 103 and the motor switch 101 are turned on in sequence, the motor 510 starts and drives the rotating wheel 520 to rotate; since the motor switch 101 is set in the hand-held area 121, the user will habitually grasp the hand-held area 121 when picking up the electric nail gun 1, and by this action, the motor switch 101 will be pressed, so as long as the power switch 103 is turned on, the motor 510 can be started as soon as possible and the rotating wheel 520 can be driven to operate. Move the electric nail gun 1 and press the safety slide bar 720 against the target object, and the safety switch 710 is triggered when the gun head assembly 150 slides. The trigger switch 102 is pressed to operate the electromagnet 410 to generate a magnetic force to attract the magnetic end 421 of the shift block 420 to swing toward the plate hole 112, so that the protruding end 422 of the shift block 420 partially protrudes out of the shift slot 311 until the rotating wheel 520 drives the driving surface 531 of the block 530 to contact and push, so that the wheel 520 drives the pulley 310 to rotate from the initial state, and the pulley 310 synchronously engages to drive the belt 330, so that the firing pin mechanism fixing seat 610 moves from the initial position of the initial rod 210 to the nailing position of the final rod 220.

[0041] The detailed features of the electric nail gun 1 of the present invention and the effects achieved by the combination of the two operations are further described. The frame plate 111 is provided with a slide rail 113 penetrating the inner surface and the outer surface, and the two ends of the slide rail 113 extend in the direction of the initial rod 210 and the final rod 220; and the fixed seat 610 is provided with a slide rod 611 and slides on the slide rail 113; so that the fixed seat 610 forms a displacement track along the slide rail 113 with the slide rod 611.

[0042] In this embodiment, a pressure plate 114 is disposed in the gun body 110 and one end of the pressure plate 114 extends into the frame plate 111; when the rotating wheel 520 contacts the protruding end 422 protruding out of the shifting groove 311 with the driving surface 531 so that the rotating wheel 520 indirectly drives the pulley 310 and reaches the position of the pressure plate 114, the protruding end 422 of the shifting block 420 is restricted by the pressure plate 114 so that the protruding end 422 is retracted and displaced into the shifting groove 311 without being exposed, so that the pulley 310 cannot be continuously driven by the rotating wheel 520 to be in a disengaged state, and the pulley 310 rotates no more than one circle from the initial state to the disengaged state.

[0043] In this embodiment, one end of the spring 105 is arranged on the outer surface of the frame plate 111, and the other end of the spring 105 is arranged on the slide bar 611. The spring 105 is stretched and stored when firing, and after firing, the restoring force of the spring 105 drives the striker mechanism to reset, and the belt 330 drives the pulley 310 to reset synchronously.

[0044] In this embodiment, the frame plate 111 is provided with a tension rail 115 penetrating the inner surface and the outer surface, and part of the steering wheel 320 is displaceably disposed on the tension rail 115, and the two ends of the tension rail 115 extend in a direction toward the gun head assembly 150 and away from the gun head assembly 150. Through the above structural configuration, the tension of the belt 330 can be adjusted, and the pulley 310 can be accurately located in the initial state position, and the shifting block 420 can be prepared at a suitable position to be magnetically attracted by the electromagnet 410 to reach an accurate swing position.

[0045] In this embodiment, the fixing seat 610 and the fixing plate 630 fix the two ends of the belt 330 in a non-overlapping state, and the fixing seat 610 and the fixing plate 630 are respectively located on the upper surface and the lower surface of the belt 330 and are fixed by bolts. Through the above structural configuration, not only can the striker mechanism and the belt 330 be fixedly combined, but also the connection between the two ends of the belt 330 is completed in a loop shape, so that it can be smoothly wound between the steering wheel 320 and the pulley 310.

[0046] In this embodiment, a shield plate 340 is arranged on the side of the pulley 310 facing the electromagnet 410, and the shield plate 340 is provided with a shield hole 341 corresponding to the wheel hole 312, and the shield plate 340 is made of a poor magnetic conductive material (aluminum material). Through the above configuration, when the electromagnet 410 is in operation, the shield plate 340 forms a magnetic force direction restriction and obstruction, reducing the direct impact of the electromagnet 410 on the pulley 310 during operation, and roughly passes through the position of the shield hole 341 to swing the attraction block 420 in the pull groove 311, so that the extended end 422 part smoothly swings to the outer position of the pull groove 311.

[0047] In this embodiment, the driving surface 531 gradually expands from the direction of the rotating wheel 520 (defined as the inner end) toward the direction away from the rotating wheel 520 (defined as the outer end), and the angle between the inner end and the outer end is 7 degrees. With the above-mentioned structural configuration, when the driving block 530 is about to contact with the shifting block 420 and rotate with it, the driving block 530 will instantly contact the surface of the extended end 422 located outside the shifting groove 311 with the driving surface 531 in the form of an inclined surface. Through the non-direct plane contact between the two, the driving block 530 can indeed provide a better ability to withstand the reaction force of the instantaneous contact with the shifting block 420. Therefore, the structural configuration adopted by the aforementioned technology can enhance the product durability of the driving block 530 of the rotating wheel 520.

[0048] In this embodiment, the shift block 420 has a retracted surface 423 and a tilted surface 424 and is generally oriented toward the bottom surface of the shift slot 311, and the retracted surface 423 and the tilted surface 424 are not the same surface; when the shift block 420, the magnetic end 421, and the extended end 422 are located in the shift slot 311, the shift block 420 contacts the bottom surface of the shift slot 311 with the retracted surface 423; and when the extended end 422 of the shift block 420 partially protrudes out of the shift slot 311, the shift block 420 contacts the bottom surface of the shift slot 311 with the tilted surface 424. Through the above-mentioned structural configuration, especially when the tilted surface 424 contacts the bottom surface of the shift slot 311, the force exerted by the driving block 530 on the shift block 420 can be partially transmitted to the bottom surface of the shift slot 311, thereby avoiding the concentrated force on the shift block 420 and the shaft, thereby obtaining better product durability.

[0049] In the above-mentioned embodiment, the electric nail gun 1 of the present invention adopts the meshing transmission mode of the belt 330 and the pulley 310, but the chain 350 and the gear 360 can be used to replace them respectively, and the meshing transmission mode of the gear 360 and the chain 350 can replace the original pulley 310 driving the belt 330, such as Fig.14 , Fig.15 shown.

[0050] See also Fig.16 The operation method of the electric nail gun is shown, including the following steps:

[0051] Turn on the power switch step S10, first turn on the power switch 103 located at the butt portion 130 of the body 100;

[0052] Turn on the motor switch step S20, holding the hand-held area 121 of the body 100 and turning on the motor switch 101 located in the hand-held area 121 at the same time, so that the motor 510 drives the rotating wheel 520 to rotate continuously;

[0053] In step S30 of turning on the safety switch, after the electric nail gun 1 is moved to the target object, the safety slide bar 720 is pressed against the target object and synchronously slides on the gun head assembly 150 to trigger the safety switch 710;

[0054] And the trigger switch opening step S40 is to open the trigger switch 102 of the trigger area 122 of the handle portion 120, so that the electromagnet generates magnetic force to attract the shift block 420 to swing, so that the protruding end 422 of the shift block 420 partially protrudes out of the shift groove 311 of the pulley 310, and the protruding end 422 is pushed by the driving block 530 of the rotating wheel 520, so that the rotating wheel 520 drives the pulley 310 to rotate from the initial state, and the pulley 310 synchronously engages and drives the belt 330, so that the firing pin mechanism moves from the initial position to the nailing position.

[0055] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An electric nail gun, comprising a body, a limit mechanism, an active mechanism, a passive mechanism, a magnetic attraction mechanism, a striker mechanism, a safety mechanism and a lithium battery box, characterized in that: The main body includes a gun body, a grip, a butt and a nail magazine. The grip is connected to the gun body and the butt. The grip includes a hand-holding area and a trigger area which are adjacent to each other. The hand-holding area and the trigger area are respectively provided with a motor switch and a trigger switch. The gun body is provided with frame plates arranged at intervals. One end of the gun body is connected with a gun head group. The nail magazine connects the gun head group and the butt. The butt is provided with a power switch. The limiting mechanism includes an initial rod and a final rod which are spaced apart from each other between the frame plates, and the final rod is closer to the gun head assembly than the initial rod; The passive mechanism is located between the frame plates and includes a pulley, a steering wheel and a belt; the belt is wound around the steering wheel and the pulley, and the belt is in meshing contact with the pulley; The magnetic attraction mechanism includes an electromagnet and a shift block; the electromagnet is assembled on the outside of the frame plate and located in the plate hole of the frame plate, the shift block can be swingably arranged in the shift groove of the pulley, and the bottom of the shift groove is provided with a wheel hole corresponding to the plate hole of the frame plate and the magnetic attraction end of the shift block; the electromagnet generates magnetic force and attracts the magnetic attraction end of the shift block to swing toward the plate hole, so that the extended end portion of the shift block protrudes out of the shift groove; The active mechanism is located in the gun body of the main body, and includes a motor and a rotating wheel driven by the motor to rotate; the rotating wheel has a driving block facing the direction of the belt pulley; the driving surface of the driving block contacts the protruding end protruding out of the pulley slot, so that the rotating wheel drives the belt pulley to rotate from an initial state; The firing pin mechanism includes a fixing seat and a firing pin, wherein the fixing seat is fixed on the belt and is located between the initial rod and the final rod, one end of the firing pin is fixed to the fixing seat, and the other end of the firing pin faces the direction of the gun head assembly; the fixing seat of the firing pin mechanism moves from the initial position of the initial rod to the nailing position of the final rod; The safety mechanism is disposed on the gun head assembly, and the safety mechanism includes a safety switch and a safety slide bar; The lithium battery box is movably connected to the butt portion, and the lithium battery box is electrically connected to the motor, the electromagnet, the power switch, the motor switch, the safety switch and the trigger switch.

2. The electric nail gun according to claim 1, characterized in that: The frame plate is provided with a slide rail penetrating the inner surface and the outer surface, and the extension direction of the two ends of the slide rail is toward the initial rod and the final rod; and the fixed seat assembly is provided with a slide rod and slides on the slide rail.

3. The electric nail gun according to claim 2, characterized in that: One end of a spring is arranged on the outer surface of the frame plate, and the other end of the spring is arranged on the slide bar.

4. The electric nail gun according to claim 1, characterized in that: A pressure plate is arranged in the gun body and one end of the pressure plate extends into between the frame plates; when the rotating wheel contacts the protruding end protruding out of the shifting groove with the driving surface so that the rotating wheel indirectly drives the pulley and reaches the pressure plate position, the protruding end of the shifting block is restricted by the pressure plate so that the protruding end is retracted and displaced into the shifting groove without being exposed, so that the pulley cannot be driven by the rotating wheel to be in a disengaged state.

5. The electric nail gun according to claim 1, characterized in that: The frame plate is provided with a tension rail penetrating the inner surface and the outer surface, a part of the steering wheel is displaceably arranged on the tension rail, and the two ends of the tension rail extend in a direction toward the gun head group and away from the gun head group.

6. The electric nail gun according to claim 1, characterized in that: The fixing seat and the fixing plate fix the two ends of the belt in a non-overlapping state, and the fixing seat and the fixing plate are respectively located on the upper surface and the lower surface of the belt and are fixed by bolts.

7. The electric nail gun according to claim 1, characterized in that: A shield is arranged on one side of the belt pulley facing the electromagnet, and the shield is provided with shield holes corresponding to the wheel holes, and the shield is made of poor magnetic conductive material (aluminum material).

8. The electric nail gun according to claim 1, characterized in that: The driving surface gradually expands from the direction of the rotating wheel (defined as the inner end) toward the direction away from the rotating wheel (defined as the outer end), and the included angle between the inner end and the outer end is 7 degrees.

9. The electric nail gun according to claim 1, characterized in that: The shift block has a retracted surface and a tilted surface, and the retracted surface and the tilted surface are not the same surface; when the shift block, the magnetic end and the extended end are located in the shift slot, the shift block contacts the bottom surface of the shift slot with the retracted surface; when the extended end portion of the shift block protrudes out of the shift slot, the shift block contacts the bottom surface of the shift slot with the tilted surface.

10. A method for operating an electric nail gun, characterized in that: The following steps are involved: To turn on the power switch, first turn on the power switch located on the butt of the gun body; The step of turning on the motor switch is to hold the hand-held area of ​​the body and turn on the motor switch located in the hand-held area at the same time, so that the motor drives the rotating wheel to rotate continuously; In the step of opening the safety switch, after the electric nail gun is moved to the target object, the safety slide bar is pressed against the target object and synchronously slides on the gun head assembly to trigger the safety switch; And the step of turning on the trigger switch, turning on the trigger switch in the trigger area of ​​the handle, so that the electromagnet generates magnetic force to attract the shift block to swing, so that the extended end of the shift block protrudes out of the shift groove of the pulley, and the extended end is pushed by the driving block of the rotating wheel, so that the rotating wheel drives the pulley to rotate from the initial state, and the pulley synchronously engages to drive the belt, so that the firing pin mechanism moves from the initial position to the nailing position.

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