Electric nail gun and its operation method

Abstract

To provide an electric nail-driving machine and an operation method thereof, in which a nail-driving mechanism can be indirectly moved to a position of performing nail-driving operation.SOLUTION: An electric nail-driving machine 1 comprises a main body 100, a limitation mechanism, a passive mechanism, a magnetic suction mechanism, an active mechanism, a nail-driving mechanism, a safety mechanism, and a lithium battery case 104. The main body includes a housing part 110, a handle part 120, a gunstock part 130, and a nail magazine part 140. The handle part connects the housing part and the gunstock part. The handle part contains a hand-held area 121 and a trigger area 122 adjacent to each other. The hand-held area has a motor switch 101. The trigger area has a trigger switch 102. Inside the housing part, frame plates are provided by being mutually spaced apart. At one end of the housing part, a head assembly 150 is attached. The nail magazine part connects the head assembly and the gunstock part. The gunstock part has a power supply switch 103.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a nail gun, and more particularly to an electric nail gun and a method of operating the same. [Background technology]

[0002] Conventional electric nail guns use AC cords or rechargeable lithium batteries. Conventional drive systems include flywheel drive, compression springs, and built-in high-pressure gas. In conventional flywheel drive mechanisms, the rotational kinetic energy of the flywheel is transferred to the slide seat at the moment the flywheel and slide seat come into contact, causing the striker to push the nail into the target. However, this process results in energy loss when transferring kinetic energy, and requires waiting for the flywheel to reach its operating speed. The friction generated by the momentary contact can adversely affect durability. Summary of the Invention [Problem to be solved by the invention]

[0003] The main object of the present invention is to provide an electric nail gun and an operating method thereof, which, when used by a user, grips the main body and turns on the motor switch, causing the motor to rotate the wheel at a predetermined rotation speed, and when the trigger switch is turned on, magnetic force is generated in the electromagnet, attracting and swinging the cam, which is pushed by the wheel's drive block, causing the pulley and wheel to rotate synchronously and the pulley to mesh synchronously with the belt, thereby indirectly moving the nailing mechanism to a position where the nailing operation will be performed. [Means for solving the problem]

[0004] In order to solve the above problems, according to a first aspect of the present invention, there is provided an electric nail gun comprising a main body, a limiting mechanism, a passive mechanism, a magnetic attraction mechanism, an active mechanism, a nail driving mechanism, a safety mechanism, and a lithium battery case, wherein the main body comprises a housing portion, a handle portion, a stock portion, and a nail magazine portion, the handle portion is connected to the housing portion and the stock portion, the handle portion comprises a hand-held area and a trigger area adjacent to each other, the hand-held area comprises a motor switch, the trigger area comprises a trigger switch, frame plates are provided within the housing portion and arranged at intervals from each other, a head assembly is attached to one end of the housing portion, the nail magazine portion is connected to the head assembly and the stock portion, and the stock portion comprises a power switch, the limiting mechanism comprises an initial rod and a terminal rod arranged at intervals from each other between the frame plates, the terminal rod is closer to the head assembly than the initial rod, the passive mechanism is located between the frame plates, and comprises a pulley, a direction-changing wheel, and a belt, the belt is connected to the direction-changing wheel and and wound around the pulley, the belt is in meshing contact with the pulley, the magnetic attraction mechanism includes an electromagnet and a cam, the electromagnet is attached to the outside of the frame plate and is located in a plate hole of the frame plate, the cam is swayably disposed in a trough portion of the pulley, a trough bottom of the trough portion is formed with a wheel hole corresponding to the plate hole of the frame plate and the magnetic attraction end of the cam, the electromagnet is activated to generate a magnetic force, the magnetic attraction end of the cam is attracted and swung toward the plate hole, and the cam a part of a protruding end of the pulley protrudes outside the tank portion; the active mechanism is located within the housing portion of the main body and includes a motor and a wheel rotated by the motor, the wheel has a drive block facing the pulley, and a drive surface of the drive block contacts the protruding end protruding outside the tank portion, causing the wheel to drive the pulley and start rotation from an initial state; the nail driving mechanism includes a fixed seat and a striker, the fixed seat is fixed on the belt and located between the initial rod and the terminal rod;The striker has one end fixed to the fixed seat and the other end facing the head assembly, the fixed seat of the nail driving mechanism moves from the initial position of the initial rod to the nail driving position of the terminal rod, the safety mechanism is disposed on the head assembly and includes a safety switch and a safety slider, and the lithium battery case is detachably connected to the stock and electrically connected to the motor, the electromagnet, the power switch, the motor switch, the safety switch and the trigger switch.

[0005] In order to solve the above problems, according to a second aspect of the present invention, there is provided a method for operating an electric nail gun, comprising the steps of: first turning on a power switch located in the butt section of the main body; gripping the hand-held area of ​​the main body and simultaneously turning on a motor switch located in the hand-held area, thereby causing the motor to continue rotating the wheel; moving the electric nail gun to a target, and then bringing a safety slider into contact with the target, causing it to slide with the head assembly and trigger the safety switch; and turning on a trigger switch in the trigger area of ​​the handle, which generates magnetic force in the electromagnet, attracting and swinging the cam, causing a portion of the protruding end of the cam to protrude outside the recess of the pulley, and when the protruding end is pushed by the drive block of the wheel, the wheel begins to rotate the pulley from its initial position, the pulley synchronously meshes with the belt, and the nail driving mechanism moves from the initial position to the nail driving position. [Effects of the Invention]

[0006] When using the electric nail gun and its operating method according to the present invention, a user holds the main body and turns on the motor switch, which causes the motor to rotate the wheel at a predetermined rotation speed. When the trigger switch is turned on, magnetic force is generated in the electromagnet, attracting and swinging the cam, which is then pushed by the wheel's drive block, causing the pulley and wheel to rotate synchronously and the pulley to mesh synchronously with the belt, thereby indirectly moving the nailing mechanism to a position where the nailing operation will be performed. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is an assembled perspective view showing an electric nail gun according to an embodiment of the present invention. [Figure 2] 1 is a partially enlarged view showing a part of a main body of an electric nail gun according to an embodiment of the present invention. [Figure 3] FIG. 3 is a perspective view showing a state in which a part of a frame plate in FIG. 2 is omitted. [Figure 4] 1 is an exploded perspective view showing a part of an electric nail gun according to an embodiment of the present invention. [Figure 5] 1 is an explanatory diagram showing a state in which the power switch and motor switch of the electric nail gun according to one embodiment of the present invention are turned on and the wheel rotates. FIG. [Figure 6] 1 is a perspective view showing the arrangement of a passive mechanism and a magnetic attraction mechanism of an electric nail gun according to an embodiment of the present invention. FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6. [Figure 8] 1 is an explanatory diagram showing the displacement of a safety slider of an electric nail gun according to one embodiment of the present invention and the state when a trigger switch is turned on. FIG. [Figure 9] 10 is an explanatory diagram of a state in which the protruding end of the cam of the electric nail gun according to one embodiment of the present invention protrudes outside the groove portion. FIG. [Figure 10] FIG. 10 is a cross-sectional view taken along line XX in FIG. 9. [Figure 11] 1 is an explanatory diagram showing a state in which a nail driving mechanism of an electric nail gun according to an embodiment of the present invention is displaced toward a head assembly by a belt. FIG. [Figure 12] 1 is an explanatory diagram showing a state in which the nail driving mechanism of the electric nail gun according to one embodiment of the present invention is displaced to the position of the terminal rod. FIG. [Figure 13] 1 is a circuit diagram showing an electric nail gun according to an embodiment of the present invention. [Figure 14] FIG. 10 is an exploded perspective view showing a part of an electric nail gun according to another embodiment of the present invention. [Figure 15] FIG. 10 is an assembled perspective view showing a part of an electric nail gun according to another embodiment of the present invention. [Figure 16] 3 is a flow chart illustrating the operation of an electric nail gun according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the accompanying drawings, in which the same reference numerals denote the same or similar components.

[0009] 1 to 12, an electric nail gun 1 according to one embodiment of the present invention includes a main body 100, a limiting mechanism, a passive mechanism, a magnetic attraction mechanism, an active mechanism, a nail driving mechanism, a safety mechanism, and a lithium battery case 104.

[0010] The main body 100 has a housing portion 110, a handle portion 120, a stock portion 130, and a nail magazine portion 140. The handle portion 120 is connected to the housing portion 110 and the stock portion. The handle portion 120 includes a grip area 121 and a trigger area 122 that are adjacent to each other at different levels. The grip area 121 has a motor switch 101. The trigger area 122 has a trigger switch 102. Frame plates 111 are provided within the housing portion 110 and are spaced apart from each other. A head assembly 150 is attached to one end of the housing portion 110. The nail magazine portion 140 is connected to the head assembly 150 and the stock portion 130. The stock portion 130 has a power switch 103. The main body 100 described above consists of two housings that are combined with each other on both sides, but does not include the nail magazine portion 140.

[0011] The limiting mechanism includes an initial rod 210 and a terminal rod 220 that are installed with a gap between them between the frame plates 111. The terminal rod 220 is closer to the head assembly 150 than the initial rod 210. The outer peripheries of the initial rod 210 and the terminal rod 220 are covered with an elastic body (e.g., rubber or foam), and when the needle driving mechanism is displaced and collides, the elastic body deforms to absorb the impact force, preventing direct damage to the structure.

[0012] The passive mechanism is located between the frame plates 111 and includes a pulley 310, a diverting wheel 320, and a belt 330. The belt 330 is wound around the diverting wheel 320 and the pulley 310. The belt 330 is in meshing contact with the pulley 310. The belt 330 is, for example, a timing belt, and meshes with the outer periphery of the pulley 310. The number of diverting wheels 320 is, for example, two.

[0013] The magnetic attraction mechanism includes an electromagnet 410 and a cam 420. The electromagnet 410 is attached to the outside of the frame plate 111 and is positioned in the plate hole 112 of the frame plate 111. The cam 420 is arranged to be swingable in the tank portion 311 of the pulley 310. A wheel hole 312 corresponding to the plate hole 112 of the frame plate 111 and the magnetic attraction end 421 of the cam 420 is formed in the tank bottom of the tank portion 311. The cam 420 is made of a highly magnetic permeable material. The cam 420 has a shaft member inserted into the tank portion 311. The cam 420 is swingable relative to the shaft member.

[0014] The active mechanism is located within the housing portion 110 of the main body 100. The active mechanism includes a motor 510 and a wheel 520 that is rotated by the motor 510. The wheel 520 has a drive block 530 that faces the pulley 310. Take the example of the motor 510 mentioned above, which can reach 8000 rpm or more.

[0015] The nailing mechanism includes a fixed seat 610 and a striker 620. The fixed seat 610 is fixed on the belt 330 and is located between the initial rod 210 and the terminal rod 220. The striker 620 has one end fixed to the fixed seat 610 and the other end facing the head assembly 150.

[0016] The safety mechanism is disposed on the head assembly 150. The safety mechanism includes a safety switch 710 and a safety slider 720.

[0017] The lithium battery case 104 is detachably connected to the stock 130. The lithium battery case 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 Figure 13. The power switch 103, the motor switch 101, the safety switch 710, and the trigger switch 102 are connected to the negative terminal of the lithium battery case 104.

[0018] In actual use, when the power switch 103 and the motor switch 101 are turned on in sequence, the motor 510 starts to rotate the wheel 520. Because the motor switch 101 is located in the hand-holding area 121, when a user picks up the electric nail gun 1, they habitually grip the hand-holding area 121, which action presses the motor switch 101, so that with the power switch 103 turned on, the motor 510 can be quickly started and the wheel 520 can be operated. When the electric nail gun 1 is moved and the safety slider 720 is pressed against a target to slide the head assembly 150, the safety switch 710 is triggered. When the trigger switch 102 is pressed, a magnetic force is generated in the electromagnet 410, which attracts the magnetically attracted end 421 of the cam 420 and swings it toward the plate hole 112, causing a part of the protruding end 422 of the cam 420 to protrude outside the trough portion 311 until it reaches the rotating wheel 520, and the driving surface 531 of the driving block 530 comes into contact with and pushes it, causing the wheel 520 to drive the pulley 310, which begins to rotate from its initial state, the pulley 310 synchronously meshes with the belt 330, and the fixed seat 610 of the nailing mechanism moves from the initial position of the initial rod 210 to the nailing position of the terminal rod 220.

[0019] The following describes the detailed features of the electric nail gun 1 according to the present invention and the effects achieved by combining its operations. The frame plate 111 has a slide rail 113 formed therethrough from the inner surface to the outer surface. The extension directions of both ends of the slide rail 113 are oriented toward the initial rod 210 and the terminal rod 220. The fixed seat 610 is fitted with a slide rod 611 and slides on the slide rail 113. The fixed seat 610 forms a displacement trajectory along the slide rail 113 via the slide rod 611.

[0020] In this embodiment, a pressure plate 114 is disposed within the housing 110. One end of the pressure plate 114 extends between the frame plates 111. The wheel 520 contacts the protruding end 422 extending outside the tank 311 via the driving surface 531. The wheel 520 indirectly drives the pulley 310 to the position of the pressure plate 114. When the wheel 520 reaches the position of the pressure plate 114, the protruding end 422 of the cam 420 is restricted by the pressure plate 114, causing the protruding end 422 to retract and displace into the tank 311 without being exposed. This puts the wheel 520 in a disengaged state, where it does not drive the pulley 310. During the process of the pulley 310 moving from the initial state to the disengaged state, the pulley 310 does not rotate more than one full rotation.

[0021] In this embodiment, one end of a spring 105 is attached to the outer surface of the frame plate 111. The other end of the spring 105 is attached to the slide rod 611. When driving a nail, the spring 105 is pulled to generate a biasing force, and after the nail driving is completed, the restoring force of the spring 105 resets the nail driving mechanism, and simultaneously, the pulley 310 is reset by the belt 330.

[0022] The frame plate 111 of this embodiment has a through hole formed from the inner surface to the outer surface. Long hole for tension adjustment 115. Some of the turning wheels 320 have Long hole for tension adjustment 115 is displaceably disposed. Long hole for tension adjustment The extension directions of both ends of 115 are toward and away from the head assembly 150. By using the above-described arrangement, the tension of the belt 330 is adjusted, the pulley 310 is accurately positioned at its initial state, the cam 420 is installed at an appropriate position, and the accurate swing position is obtained in advance by the magnetic attraction of the electromagnet 410.

[0023] In this embodiment, the fixing seat 610 and the fixing piece 630 fix both ends of the belt 330 without overlapping. The fixing seat 610 and the fixing piece 630 are respectively located on the upper and lower surfaces of the belt 330 and are fastened with bolts. In the above-described arrangement, in addition to connecting and fixing the nailing mechanism to the belt 330, the connection at both ends of the belt 330 is formed into a ring shape and smoothly wound between the diverting wheel 320 and the pulley 310.

[0024] In this embodiment, pulley 310 has shielding plate 340 attached to one side facing electromagnet 410. Shielding plate 340 has shielding holes 341 corresponding to wheel holes 312. Shielding plate 340 is made of a low-magnetic-permeability material (e.g., aluminum). Due to the above-described arrangement, when electromagnet 410 is activated, shielding plate 340 limits or blocks the direction of magnetic force, thereby reducing the direct effect of electromagnet 410 on pulley 310. Furthermore, cam 420, which passes through shielding hole 341 and is attracted to pulley 310, swings within tank 311, and a portion of protruding end 422 moves smoothly outside tank 311.

[0025] In this embodiment, the drive surface 531 widens from the direction toward the wheel 520 (defined as the inward end) toward the direction away from the wheel 520 (defined as the outward end). The angle between the inward end and the outward end is 7 degrees. With the above-described arrangement, when the drive block 530 contacts the cam 420 and rotates accordingly, the drive block 530 momentarily contacts the surface of the protruding end 422 located on the outside of the trough portion 311 via the inclined drive surface 531. The two contact each other in a planar manner, rather than directly, and the drive block 530 can withstand a large reaction force generated when the drive block 530 momentarily contacts the cam 420. Therefore, the arrangement employed in the above-described technology can enhance the durability of the drive block 530 of the wheel 520.

[0026] In this embodiment, the cam 420 has a receding surface 423 and a rising surface 424, and faces substantially toward the bottom of the tub portion 311. The receding surface 423 and the rising surface 424 are not formed on the same surface. When the cam 420, the magnetically attracted end 421, and the protruding end 422 are positioned within the tub portion 311, the cam 420 contacts the bottom of the tub portion 311 via the receding surface 423. When a portion of the protruding end 422 of the cam 420 protrudes outside the tub portion 311, the cam 420 contacts the bottom of the tub portion 311 via the rising surface 424. This arrangement, particularly when the rising surface 424 contacts the bottom of the tub portion 311, transmits a portion of the force of the drive block 530 that the cam 420 receives to the bottom of the tub portion 311, preventing the force from being concentrated on the cam 420 and the shaft member, resulting in high durability of the product.

[0027] In the electric nail gun 1 according to the present invention, the method of transmitting power by meshing the belt 330 and pulley 310 as in the above-described embodiment may be replaced by a chain 350 and a gear 360. FIGS. 14 and 15 show a state in which the method of transmitting power by meshing the gear 360 and the chain 350 replaces the original method of driving the belt 330 with the pulley 310.

[0028] Please refer to Fig. 16. As shown in Fig. 16, the method for operating the electric nail gun according to the present invention includes the following steps (S10) to (S40).

[0029] Step of turning on the power switch (S10): First, the power switch 103 located on the stock 130 of the main body 100 is turned on.

[0030] Step of turning on the motor switch (S20): When the hand-held area 121 of the main body 100 is gripped and the motor switch 101 located in the hand-held area 121 is turned on, the motor 510 continues to rotate the wheel 520.

[0031] Step of turning on the safety switch (S30): After the electric nail gun 1 is moved to the target, the safety slider 720 is brought into contact with the target, whereby the head assembly 150 slides to trigger the safety switch 710.

[0032] Step of turning on the trigger switch (S40): When the trigger switch 102 in the trigger area 122 of the handle portion 120 is turned on, a magnetic force is generated in the electromagnet, which attracts and swings the cam 420, causing a part of the protruding end 422 of the cam 420 to protrude outside the trough portion 311 of the pulley 310. When the protruding end 422 is pushed by the drive block 530 of the wheel 520, the wheel 520 starts to rotate the pulley 310 from the initial position, and the pulley 310 synchronously engages with the belt 330, allowing the nail driving mechanism to move from the initial position to the nail driving position. [Explanation of symbols]

[0033] 1. Electric nail gun 100 units 101 Motor switch 102 Trigger switch 103 Power switch 104 Lithium Battery Case 105 Spring 110 Housing section 111 Frame Plate 112 Plate Hall 113 Slide Rail 114 Pressure plate 115 Long hole for tension adjustment 120 Handle 121 On-hand area 122 Trigger Area 130 Buttstock 140 Nail Magazine 150 Head Assembly 210 Initial Rod 220 Terminal rod 310 Pulley 311 Tank section 312 Wheel Hall 320 Turning Wheel 330 Belt 340 Shielding plate 341 Shield hole 350 Chain 360 Gear 410 Electromagnet 420 Cam 421 Magnetic attraction end 422 Projecting end 423 Recessed surface 424 Raised Surface 510 Motor 520 wheels 530 Drive Block 531 Drive Surface 610 Fixed seat 611 Slide Rod 620 Striker 630 Fixed piece 710 Safety Switch 720 Safety Slider

Claims

1. An electric nail gun comprising a main body, a limiting mechanism, a passive mechanism, a magnetic attraction mechanism, an active mechanism, a nail driving mechanism, a safety mechanism, and a lithium battery case, the main body has a housing portion, a handle portion, a stock portion, and a nail magazine portion, the handle portion is connected to the housing portion and the stock portion, the handle portion includes a hand-holding area and a trigger area adjacent to each other, the hand-holding area has a motor switch, the trigger area has a trigger switch, frame plates are provided within the housing portion and arranged at intervals from each other, a head assembly is attached to one end of the housing portion, the nail magazine portion is connected to the head assembly and the stock portion, and the stock portion has a power switch, the limiting mechanism includes an initial rod and a terminal rod spaced apart from each other between the frame plates, the terminal rod being closer to the head assembly than the initial rod; the passive mechanism is located between the frame plates and includes a pulley, a diverting wheel, and a belt, the belt being wound around the diverting wheel and the pulley, and the belt being in meshing contact with the pulley; The magnetic attraction mechanism includes an electromagnet and a cam, the electromagnet is attached to the outside of the frame plate and is located in a plate hole of the frame plate, the cam is swayably disposed in the trough portion of the pulley, the trough bottom is formed with a wheel hole corresponding to the plate hole of the frame plate and the magnetic attraction end of the cam, the electromagnet is activated to generate a magnetic force, the magnetic attraction end of the cam is attracted and swung toward the plate hole, and a part of the protruding end of the cam protrudes outside the trough portion, the active mechanism is located within the housing of the main body and includes a motor and a wheel rotated by the motor, the wheel having a drive block facing the pulley, a drive surface of the drive block contacting the protruding end protruding outside the tank, and the wheel drives the pulley to start rotating from an initial state; The nail driving mechanism includes a fixed seat and a striker, the fixed seat is fixed on the belt and is positioned between the initial rod and the terminal rod, the striker has one end fixed to the fixed seat and the other end facing the head assembly, and the fixed seat of the nail driving mechanism moves from an initial position of the initial rod to a nail driving position of the terminal rod, the safety mechanism is disposed on the head assembly and includes a safety switch and a safety slider; The lithium battery case is detachably connected to the stock and electrically connected to the motor, the electromagnet, the power switch, the motor switch, the safety switch, and the trigger switch.

2. The frame plate has a slide rail formed therethrough from the inner surface to the outer surface, and the extending direction of both ends of the slide rail is oriented toward the initial rod and the terminal rod; 2. The electric nail gun according to claim 1, wherein a slide rod is attached to the fixed seat and slides on the slide rail.

3. One end of a spring is attached to the outer surface of the frame plate; 3. The electric nail gun according to claim 2, wherein the other end of the spring is attached to the slide rod.

4. A pressure plate is disposed within the housing portion, The electric nail gun of claim 1, wherein one end of the pressure plate extends between the frame plates, and the wheel contacts the protruding end extending outside the trough portion via the drive surface, and when the pulley is indirectly driven between the wheels to reach the position of the pressure plate, the protruding end of the cam is restricted by the pressure plate, and the protruding end retracts, displaces into the trough portion and is not exposed, and the wheel enters a disengaged state in which it does not drive the pulley.

5. 2. The electric nail gun according to claim 1, wherein the frame plate has a tension adjustment slot formed through it from the inner surface to the outer surface, and some of the direction-changing wheels are displaceably disposed in the tension adjustment slot, and both ends of the tension adjustment slot extend in a direction toward the head assembly and a direction away from the head assembly.

6. The fixing seat and the fixing piece are fixed in a state where both ends of the belt do not overlap, 2. The electric nail gun according to claim 1, wherein the fixing seat and the fixing piece are respectively positioned on the upper and lower surfaces of the belt and are fastened by bolts.

7. The pulley has a shielding plate attached to one side facing the electromagnet, 2. The electric nail gun according to claim 1, wherein the shielding plate has shielding holes corresponding to the wheel holes and is made of aluminum.

8. the drive surface widens from a direction toward the wheel (defined as the inboard end) to a direction away from the wheel (defined as the outboard end); 2. The electric nail gun according to claim 1, wherein the angle between the inward end and the outward end is 7 degrees.

9. the cam has a receding surface and an ascending surface; The recessed surface and the raised surface are not formed on the same surface, 2. The electric nail gun according to claim 1, wherein when the cam, the magnetically attracted end, and the protruding end are positioned within the tub portion, the cam contacts the bottom surface of the tub portion via the retracted surface, and when a portion of the protruding end of the cam protrudes outside the tub portion, the cam contacts the bottom surface of the tub portion via the raised surface.

10. First, a power switch located on the butt of the main body is turned on. a step of turning on a motor switch located in the hand-held area of ​​the main body while gripping the hand-held area of ​​the main body, the motor continuing to rotate the wheel; After moving the electric nail gun to the target, when the safety slider abuts against the target, the head assembly slides to trigger the safety switch, and the safety switch is turned on; a step of turning on a trigger switch in the trigger area of ​​the handle, which generates a magnetic force in the electromagnet to attract and swing the cam, causing a part of the protruding end of the cam to protrude outside the trough portion of the pulley, and when the protruding end is pushed by the drive block of the wheel, the wheel starts to rotate the pulley from its initial position, the pulley synchronously engages with the belt, and the nail driving mechanism moves from the initial position to the nail driving position.

Images