Firing pin drive mechanism for electric nail gun

Abstract

The present invention discloses a firing pin drive mechanism for an electric nail gun, including a firing pin, a drive motor, a transmission, a drive cam, and a relay device. The firing pin has drive teeth only on the drive cam side, which mesh with multiple cam pin shafts on the drive cam. A nail groove is provided at the center of the top surface of the front end of the firing pin, and a locking hole is provided at the end of the nail groove. The locking hole has a triangular protrusion on the front bottom surface of the firing pin. The relay device includes a mounting seat, and a firing pin support block is provided in the mounting seat. One end of the firing pin support block is movably hinged to the mounting seat, and the other free end has an upward-facing arc-shaped tab protrusion. A return spring is provided at the bottom of the arc-shaped tab protrusion. The return spring is pre-compressed so that the arc-shaped tab protrusion is always pressed against the bottom of the firing pin. The firing pin of the firing pin drive mechanism employs a one-sided tooth structure, and a passive relay device is designed, which not only simplifies the structure but also improves the operational stability of the nail gun.

Description

[Technical Field]

[0001] The present invention relates to an electric nail gun, and more particularly to a firing pin drive mechanism for an electric nail gun. [Background technology]

[0002] Electric nailers do not require a high-pressure gas source during operation, making them more convenient to use than pneumatic nailers and more widely applicable, and have become popular in recent years.

[0003] Existing electric nail guns mainly include a main body, a charging mechanism, a firing pin drive mechanism, and a magazine mechanism. The charging mechanism is located at the top rear of the main body, the firing pin drive mechanism is located in the middle of the main body, and the magazine mechanism is located at the front end of the main body.

[0004] The sealed internal space of the firing pin accumulator is filled with a pre-pressurized inert gas. The firing pin drive mechanism primarily includes a firing pin, a drive motor, a transmission, a drive cam, a Hall sensor for detecting the rotational position of the drive cam, a relay device located on the other side of the firing pin opposite the drive cam, and a firing pin middle slide guide block located on the top and bottom of the firing pin. The magazine mechanism has the functions of storing, feeding, and ejecting nails, and has a nail ejection port, a firing pin front slide guide protrusion, and a nail ejection groove. During operation, the magazine feeds stored nails one by one into the nail ejection groove. The rear end of the firing pin enters the firing pin accumulator and is movably hingedly connected to the piston of the accumulator, linking the two. The middle section of the firing pin slides back and forth along the firing pin middle slide guide block located on the top and bottom of the firing pin. The front end of the firing pin enters the magazine mechanism and slides back and forth along the slide guide protrusion of the magazine mechanism. After assembly, the centerline of the firing mechanism, the centerline of the firing pin, and the nail ejection groove of the magazine mechanism are aligned in a straight line.

[0005] During operation, the drive motor rotates the drive cam via the transmission, causing the firing pin to move backward toward the firing mechanism and return to its original position. At the same time, the sealed inert gas within the firing mechanism is compressed, thereby priming the firing mechanism. After the firing operation is completed, the drive cam separates from the firing pin. The firing pin is then rapidly ejected forward by the explosive force of the expanding compressed gas within the firing mechanism, striking a nail fed into the nail ejection slot of the magazine mechanism and ejecting the nail from the slot, completing the nail-driving operation.

[0006] The firing pin in the above structure has a double-toothed structure, with a drive cam and a relay device on each side. The firing pin has drive teeth on the side facing the drive cam. These drive teeth engage with multiple cam pin shafts spaced apart on the drive cam. During operation, the cam pin shaft of the drive cam engages with the drive teeth to retract the firing pin from its forward end at the end of the nailing operation and return it to its fully charged position at the rear end. In practice, to achieve a better firing effect, the drive cam typically requires two rotations to complete one full retraction and charging operation. Therefore, relay teeth are provided on the side of the firing pin facing the relay device. When the drive cam rotates once, the pin shaft of the drive cam separates from the drive teeth. At this time, the relay device must extend its relay pawl to engage and lock with the relay teeth on the firing pin, maintaining the firing pin's position and preventing the firing pin from being ejected while it is not fully charged. When the pin shaft of the driving cam rotates until it again engages with the driving teeth, the relay pawl of the relay device simultaneously retracts, ensuring that the firing pin continues to retract and perform the return charging operation.

[0007] In the above structure, the relay device is an active operating mechanism with a more complex structure and operation. The extension and retraction of its relay pawl is controlled by a Hall sensor located near the drive cam. During operation, the Hall sensor detects the rotation angle of the drive cam in real time. After the drive cam rotates once, it detects that its pin shaft is about to separate from the firing pin drive tooth and sends a signal to activate the relay device, extending the relay pawl to engage and lock with the relay tooth of the firing pin. After the drive cam continues to rotate a certain angle, the pin shaft of the drive cam again engages with the firing pin drive tooth, activating the relay device and retracting the relay pawl, separating it from the relay tooth of the firing pin.

[0008] After many years of use, it was discovered that there was a certain error in the accuracy of the detection of the rotational position of the drive cam by the Hall sensor. If the signal was sent too early or too late, the timing of the relay claw extension of the relay device would be too early or too late, causing the relay to fail, which would ultimately affect the normal operation of the nail gun. Summary of the Invention [Problem to be solved by the invention]

[0009] To address the above-mentioned issues, the present invention designs a firing pin drive mechanism for an electric nail gun, in which the firing pin adopts a one-sided tooth structure, and further designs a passive relay device, which not only simplifies the structure but also improves the operational stability of the nail gun. [Means for solving the problem]

[0010] To achieve the above object, the present invention adopts the following technical solutions.

[0011] It mainly includes a firing pin, a driving motor, a transmission, a driving cam, and a relay device. The rear end of the firing pin enters the charging mechanism of the nail gun and is movably hingedly connected to the piston of the charging mechanism to maintain the linkage, and the front end of the firing pin enters the magazine mechanism of the nail gun; The driving motor rotates a driving cam through a transmission, and the driving motor is a firing pin driving mechanism of an electric nail gun, The firing pin has drive teeth only on the drive cam side, which engage with multiple cam pin shafts on the drive cam. When the drive cam rotates, the firing pin moves back and forth to charge the gun. A nail groove is provided at the center of the top surface of the front end of the firing pin, extending from the front end to the middle of the firing pin, and a locking hole is provided at the end of the nail groove, penetrating the top and bottom surfaces of the firing pin, and the locking hole has a triangular protrusion at the front of the bottom surface of the firing pin. The relay device includes a mounting seat provided between the firing pin drive mechanism and the accumulator mechanism, and a firing pin support block is provided on the mounting seat at a position directly opposite the center of the firing pin, one end of which is movably hinged to the mounting seat and the other free end of which is provided with an upwardly facing arc-shaped tab protrusion, and a return spring is provided at the bottom of the arc-shaped tab protrusion, the return spring having a pre-compressed amount so that the arc-shaped tab protrusion always has a tendency to rotate upward and is pressed against the bottom of the firing pin, During the firing pin's return process, after the driving cam has rotated once, the arc-shaped tab protrusion enters the locking hole of the firing pin just after the pin shaft separates from the driving teeth. Firing pin drive mechanism for electric nail gun.

[0012] The inclination of the front side of the arc-shaped tab protrusion is smaller than that of the rear side, and at the same time, the inclination of the front side of the triangular protrusion is also smaller than that of the rear side. After the arc-shaped tab protrusion enters the locking hole, its rear side is pressed against the rear of the locking hole, restricting the forward movement of the firing pin. As the firing pin continues to retract, the edge of the apex angle of the triangular protrusion slides against the gentle front side of the arc-shaped tab protrusion, causing the arc-shaped tab protrusion to rotate in the opposite direction and quickly separate from the locking hole.

[0013] A linear slide groove is provided parallel to the nail groove on the other side of the middle of the top surface of the firing pin, opposite the drive tooth. The mounting seat is provided with a firing pin middle stage slide guide block that is parallel to the nail groove of the firing pin, and the guide block is fixed to the mounting seat via a connecting arm. The linear slide groove of the firing pin slides back and forth along the firing pin middle slide guide block of the mounting seat.

[0014] The magazine mechanism is composed of an upper case, a lower case, and a nail clip that stores and supplies nails. A nail injection groove is provided in the center of the bottom surface of the upper case, and guide protrusions are provided on both sides of the nail injection groove. The center line of the firing pin and the center line of the firing mechanism are aligned in a straight line coaxial with the nail ejection groove of the magazine mechanism. A nail outlet hole is provided in the center of the lower case, penetrating the upper and lower surfaces thereof, and the nail outlet hole communicates with a nail clip located below the lower case.

[0015] The nail-driving groove at the front end of the firing pin slides back and forth along guide protrusions on either side of a nail-ejecting groove in the center of the bottom surface of the top case of the magazine mechanism.

[0016] The sealed space of the energy storage mechanism is filled with an inert gas having a certain pre-pressure.

[0017] The start and stop operation of the drive motor is controlled by the hand wrench on the main body and the controller inside the main body. When the hand wrench is pressed, the drive motor starts directly and operates. The drive motor is delayed and stopped by the controller. The controller detects the operating current of the drive motor in real time, compares the detected current signal with a stored current setting value, and when the current signal exceeds the current setting value, immediately cuts off the power supply to the drive motor to stop its operation.

[0018] The current setting value is less than the maximum current value during operation of the drive motor.

[0019] The arc-shaped tab protrusion on the firing pin support block of the relay device always passively contacts the bottom of the firing pin due to the return force of the return spring. During the nail-driving process, the firing pin, which is at its fully charged position, is rapidly ejected by the explosive force of the compressed gas in the firing mechanism, striking the nail. Due to the triangular protrusion on the front of the firing pin's locking hole, the arc-shaped tab protrusion first overcomes the triangular protrusion on the bottom of the firing pin and then directly overcomes the locking hole due to kinetic inertia, ensuring smooth and uninterrupted ejection of the firing pin. During the firing pin's return process from the end of nail-driving to its fully charged position, when the driving cam rotates once, the arc-shaped tab protrusion precisely enters the firing pin's locking hole just as the driving cam's pin shaft separates from the driving teeth, locking the firing pin forward and preventing the firing pin from being ejected during its return. When the pin shaft of the driving cam rotates until it again engages with the driving tooth, the firing pin continues to retract, and the sliding of the edge of the apex angle of the triangular protrusion and the gentle front side of the arc-shaped tab protrusion causes the arc-shaped tab protrusion to rotate in the opposite direction and quickly separate from the locking hole, ensuring the firing pin continues to return. [Effects of the Invention]

[0020] In the above configuration, the relay mechanism consisting of the firing pin support block and return spring is a passive relay device, and its arc-shaped tab protrusion is always in close contact with the firing pin throughout the entire firing process, eliminating the need for detection and control. By utilizing the cooperation of the arc-shaped tab protrusion with the bottom surface of the firing pin, the locking hole, and the triangular protrusion, smooth and uninterrupted firing of the firing pin and intermediate relay operation during the return process can be ensured. This device is characterized by its simple structure and stable operating performance. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a schematic perspective structural view of the present invention. [Figure 2] FIG. 2 is a perspective view of the installation of the nail driver of the present invention. [Figure 3] 1 is a schematic perspective structural view of a firing pin of the present invention; FIG. [Figure 4] FIG. 2 is a schematic perspective structural view of the firing pin of the present invention from another perspective. [Figure 5] FIG. 2 is a schematic perspective view of a drive cam according to the present invention; [Figure 6] FIG. 2 is an exploded perspective view of the magazine mechanism of the present invention. [Figure 7] 1 is a schematic perspective view of a relay device according to the present invention; [Figure 8] 1 is a schematic perspective view of the relay device and firing pin of the present invention; FIG. [Figure 9] FIG. 2 is a schematic perspective structural view of the relay device and firing pin of the present invention from another perspective. DETAILED DESCRIPTION OF THE INVENTION

[0022] As shown in Figures 1 to 9, the firing pin drive mechanism 1 of the electric nail gun is provided in the middle of the nail gun body 2. An energy storage mechanism 3 is provided at the rear of the top of the nail gun body 2, and a magazine mechanism 4 is provided at the front of the nail gun body 2.

[0023] The firing pin drive mechanism 1 mainly includes a firing pin 12 , a drive motor 13 , a drive cam 14 , and a relay device 15 .

[0024] A connecting hole 12a is provided at the rear end of the firing pin 12, and the connecting hole 12a enters the energy storage mechanism 3 of the nail gun and is hingedly connected to the piston 31 of the energy storage mechanism. The energy storage mechanism 3 includes a cylinder 32 and a piston 31. The sealed space of the energy storage mechanism 3 is filled with inert gas with a certain pre-pressure. When the piston 31 retracts, the inert gas is compressed, thereby achieving the energy storage operation. Other energy storage structures may also be used. The front end of the firing pin 12 enters the magazine mechanism 4 of the nail gun.

[0025] The drive motor 13 operates the drive cam 14 via a transmission 131 . The drive cam 14 includes two eccentric wheels 14a of the same structure spaced apart from one another above and below. The circular center holes of the two eccentric wheels 14a are connected to the output shaft of the transmission 131. A plurality of pin shafts 14b are provided at intervals along the circumference in the hollow space between the two eccentric wheels 14a. In this drawing, four pin shafts 14b are shown, but three or more pin shafts may be used as needed.

[0026] The firing pin 12 has a one-sided tooth structure, with drive teeth 121 provided only on the drive cam 14 side. The drive teeth 121 mesh with multiple cam pin shafts 14b of the drive cam 14 to transmit power. Because the drive cam 14 must rotate two times during the entire process of retracting and returning the firing pin 12, the number of drive teeth 121 on the firing pin 12 is twice the number of pin shafts 14b on the drive cam 14. In the illustration, there are four pin shafts 14b, and therefore eight corresponding drive teeth 121. The rotation of the drive cam 14 causes the firing pin 12 to move back and return, thereby realizing the charging operation of the charging mechanism 3.

[0027] A nail groove 122 is provided in the center of the top surface of the front end of firing pin 12, extending from the front end to the middle of firing pin 12. At the end of nail groove 122, a locking hole 123 is provided that penetrates the top and bottom surfaces of firing pin 12. The locking hole 123 has a triangular protrusion 124 on the front side of the bottom surface of the firing pin 12, and the inclination of the front side surface 1241 is smaller than the inclination of the rear side surface 1242.

[0028] Between the firing pin drive mechanism and the firing pin accumulator mechanism 3, a relay device 15 including a mounting seat 151 is provided and is positioned in the main body 2 by a screw. A firing pin support block 152 is provided on the mounting seat 151 directly opposite the center of the firing pin 12. One end of the block is movably hinged to the mounting seat 151, and the other free end is provided with an upward-facing arc-shaped tab protrusion 1521. A return spring 153 is provided at the bottom of the arc-shaped tab protrusion 1521. The return spring 153 is pre-compressed so that the arc-shaped tab protrusion 1521 always has a tendency to rotate upward and is pressed against the bottom of the firing pin 12. During the retraction and return process of the firing pin 12, the driving cam 14 rotates once, and immediately after its pin 14b separates from the firing pin drive tooth 121, the arc-shaped tab protrusion 1521 enters the locking hole 123 of the firing pin 12.

[0029] To facilitate the positioning and connection of the return spring 153, the firing pin support block 152 is provided with a positioning projection 1522 at the bottom of its free end.

[0030] The inclination of the front side surface 15211 of the arc-shaped tab protrusion 1521 is smaller than the inclination of the rear side surface 15212. This structure, combined with the structure in which the inclination of the front side surface 1241 of the triangular protrusion 124 is also smaller than the rear side surface 1242, means that after the arc-shaped tab protrusion 1521 enters the locking hole 123, the rear side surface 15212 is pressed against the rear of the locking hole 123, thereby stopping the forward movement of the firing pin 12. As the firing pin 12 continues to retract, the apex edge of the triangular protrusion 124 slides gently against the front side surface 15211 of the arc-shaped tab protrusion 1521, causing the arc-shaped tab protrusion 1521 to rotate in the opposite direction and quickly separate from the locking hole 123.

[0031] During operation, the arc-shaped tab protrusion 1521 of the firing pin support block 152 of the relay device 15 is always passively pressed against the bottom of the firing pin 12 by the return force of the return spring 153. During the firing pin 12 operation, as the firing pin 12 moves from the fully charged position to the end of the nail driving operation, the triangular protrusion 124 on the front surface of the locking hole 123 causes the arc-shaped tab protrusion 1521 to first be pressed down and overcome the triangular protrusion 124, and then directly overcome the locking hole 123 due to its kinetic inertia, thereby ensuring that the firing pin 12 is ejected smoothly, quickly, and without hindrance. During the return process of firing pin 12 from the nail-driving completion position to the fully charged position, when driving cam 14 completes one rotation, arc-shaped tab 1521 enters locking hole 123 of firing pin 12 just as pin shaft 14b of driving cam 14 separates from drive tooth 121, locking firing pin 12 forward and preventing firing pin 12 from being ejected during return. When pin shaft 14b of driving cam 14 rotates until it again engages drive tooth 121, continuing to retract firing pin 12. Due to the sliding motion between the apex edge of triangular protrusion 124 and the gentle front surface 15211 of arc-shaped tab 1521, arc-shaped tab 1521 rotates in the opposite direction and quickly separates from locking hole 123, ensuring smooth retraction and return of firing pin 12. This process continues until firing pin 12 has fully retracted and charged. After the charging is completed, as the driving cam 14 continues to rotate, its pin shaft 14b quickly separates from the driving tooth 121 at the front of the firing pin 12. At this time, the firing pin 12 is quickly ejected by the explosive force of the charging mechanism 3 and begins the nail driving operation again. In this way, the electric nail gun can continuously drive nails.

[0032] In the above configuration, the relay mechanism 15, consisting of the firing pin support block 152 and the return spring 153, is a passive relay device. Its arc-shaped tab protrusion 1521 is always in close contact with the center of the bottom of the firing pin 12 throughout the entire firing process, and in cooperation with the locking hole 123 and the triangular protrusion 124, ensures a smooth intermediate relay during the firing pin 12 ejection and return. This allows for a simple structure and stable operational performance.

[0033] Considering that the arc-shaped tab protrusion 1521 of the firing pin support block 152 is constantly pressed against the bottom of the firing pin 12, there is a possibility that the firing pin 12 may lift up during operation. To prevent this, a linear slide groove 125 is provided in the middle of the top surface of the firing pin 12, on the side opposite the drive tooth 121, parallel to the nail driving groove 122. A firing pin middle section slide guide block 16 is provided above this linear slide groove 125, allowing it to slide along the linear slide groove. This guide block is fixed to the mounting base 151 or the main body 2 via a connecting arm 161. The arrangement of the linear slide groove 125 above the firing pin 12 and the firing pin middle section slide guide block 16 restricts the firing pin 12 from always operating on a fixed working plane, ensuring centering of the firing pin's back-and-forth reciprocating motion, and further improving the effectiveness and accuracy of the firing pin's nail driving.

[0034] Considering ease of assembly and processing, the magazine mechanism 4 is composed of an upper case 41, a lower case 42, and a nail clip 43 that stores and supplies nails. A nail ejection groove 411 is provided in the center of the bottom surface of the upper case 41, with guide protrusions 412 on both sides of the nail ejection groove 411. The center lines of the firing pin 12 and the firing mechanism 3 are aligned coaxially with the nail ejection groove 411 of the magazine mechanism 4. During operation, the nail driving groove 122 at the front end of the firing pin 12 slides back and forth along the guide protrusions 412 on both sides of the nail ejection groove 411 to drive a nail. A nail outlet 421 is provided in the center of the lower case 42, penetrating both the top and bottom surfaces, and communicates with the nail clip 43 located below the lower case.

[0035] The start and stop operations of the drive motor 13 are controlled by the hand wrench 21 on the main body 2 and the controller 22 inside the main body 2. When the hand wrench 21 is pressed, the drive motor 13 starts up and operates directly. The operation and stop of the drive motor 13 is delayed and controlled by the controller 22. The controller 22 can detect the operating current of the drive motor 13 in real time and compare the detected current signal of the drive motor 13 with the current setting value stored inside. If the detected current signal exceeds the current setting value, the power supply to the drive motor 13 is immediately cut off to achieve the stop operation.

[0036] Here, the current setting value is slightly smaller than the maximum current value during operation of the drive motor 13. This setting is because the maximum current during operation of the drive motor 13 actually occurs when the firing pin 12 reaches the maximum charged position, and the load at that time is maximum. Considering the actual operational needs, the best operational efficiency can be achieved only when the motor stops operating just before reaching the maximum charged position. On the next start, the motor can be directly turned to the maximum charged position to perform a nail driving operation, thereby fundamentally eliminating the idle time between two nail driving operations and improving operational efficiency.

[0037] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any way. Any simple modifications, equivalent changes or modifications made to the above examples based on the technical principles of the present invention fall within the scope of the technical proposal of the present invention. [Explanation of symbols]

[0038] 1 Firing pin drive mechanism 12 firing pin 121 Firing pin drive tooth 12a Firing pin connection hole 122 Nail groove 123 Locking hole 124 Triangular process 1241 Anterior aspect of the triangular process 1242 Posterior aspect of the triangular process 125 Linear slide groove 13 Drive motor 131 Transmission 14 Drive cam 14a eccentric wheel 14b pin shaft 15 Relay device 151 Mounting seat 152 Firing pin support block 1521 Arc-shaped tab protrusion 15211 Front side of arc-shaped tab protrusion 15212 Rear side of arc-shaped tab protrusion 153 Return spring 1522 Positioning protrusion 16 Firing pin middle stage slide guide block 161 Connecting Arm 2 Main unit 21 Hand wrench 22 Controller 3 Energy storage mechanism 31 Piston 32 cylinders 4 Magazine mechanism 41 Upper case 411 Nail injection groove 412 Guide protrusion 42 Lower case 421 Nail outlet 43 Nail Clip

Claims

1. It mainly includes a firing pin (12), a driving motor (13), a transmission (131), a driving cam (14), and a relay device (15). The rear end of the firing pin (12) enters the charging mechanism (3) of the nail gun and is movably hingedly connected to the piston (31) of the charging mechanism to maintain interlocking, and the front end of the firing pin (12) enters the magazine mechanism (4) of the nail gun. The driving motor (13) rotates a driving cam (14) through a transmission (131), and the driving motor (13) is a firing pin driving mechanism of an electric nail gun, The firing pin (12) is provided with a driving tooth (121) only on the driving cam (14) side, and the driving tooth (121) meshes with a plurality of cam pin shafts (14b) of the driving cam (14). When the driving cam (14) rotates, the firing pin (12) moves backward and returns to its original position, thereby performing the charging operation. A nail groove (122) is provided at the center of the top surface of the front end of the firing pin (12) and extends from the front end of the firing pin (12) to the middle of the firing pin. At the end of the nail groove (122) is provided a locking hole (123) that penetrates the top and bottom surfaces of the firing pin (12). The locking hole (123) has a triangular protrusion (124) at the front of the bottom surface of the firing pin (12). The relay device (15) including a mounting seat (151) is provided between the firing pin drive mechanism and the accumulator mechanism (3), and a firing pin support block (152) is provided on the mounting seat (151) at a position directly opposite the center of the firing pin (12), one end of which is movably hinged to the mounting seat (151), and the other free end of which is provided with an upwardly facing arc-shaped tab protrusion (1521), and a return spring (153) is provided at the bottom of the arc-shaped tab protrusion (1521), and the return spring (153) has a pre-compression amount so that the arc-shaped tab protrusion (1521) always has a tendency to rotate upward and is pressed against the bottom of the firing pin (12). During the retraction and return process of the firing pin (12), after the driving cam (14) has rotated once, the pin shaft (14b) separates from the driving tooth (121), and immediately after that, the arc-shaped tab protrusion (1521) just enters the locking hole (123) of the firing pin (12). A firing pin drive mechanism for an electric nail gun.

2. The inclination of the front surface (15211) of the arc-shaped tab protrusion is smaller than the inclination of the rear surface (15212) of the arc-shaped tab protrusion, and at the same time, the inclination of the front surface (1241) of the triangular protrusion is also smaller than the rear surface (1242) of the triangular protrusion. After the arc-shaped tab protrusion (1521) enters the locking hole (123), the rear surface (15212) of the arc-shaped tab protrusion is pressed against the rear of the locking hole (123), restricting the forward movement of the firing pin (12). As the firing pin (12) continues to retreat, the sliding between the edge of the apex angle of the triangular protrusion (124) and the front surface (15211) of the gentle arc-shaped tab protrusion causes the arc-shaped tab protrusion (1521) to rotate in the opposite direction and quickly separate from the locking hole (123).

2. The firing pin drive mechanism of an electric nailer according to claim 1.

3. A linear slide groove (125) is provided in the middle of the top surface of the firing pin (12) on the other side opposite the driving tooth (121) and parallel to the nail groove (122). The mounting seat (151) is provided with a firing pin middle stage slide guide block (16) that is parallel to the nail groove (122) of the firing pin, and the guide block is fixed to the mounting seat (151) via a connecting arm (161). The linear slide groove (125) of the firing pin (12) reciprocates along the firing pin middle slide guide block (16) of the mounting seat (151).

2. The firing pin drive mechanism of an electric nailer according to claim 1.

4. The magazine mechanism (4) is composed of an upper case (41), a lower case (42), and a nail clip (43) having the functions of storing and supplying nails. A nail injection groove (411) is provided at the center of the bottom surface of the upper case (41), and guide protrusions (412) are provided on both sides of the nail injection groove. The center line of the firing pin (12) and the center line of the accumulator mechanism (3) are arranged in a straight line coaxial with the nail ejection groove (411) of the magazine mechanism (4); A nail outlet (421) is provided in the center of the lower case (42) so as to penetrate the upper and lower surfaces thereof, and the nail outlet (421) communicates with a nail clip (43) located below the lower case.

4. The firing pin drive mechanism for an electric nailer according to claim 1.

5. The nail-driving groove (122) at the front end of the firing pin (12) slides back and forth along the guide protrusions (412) on both sides of the nail-ejecting groove (411) at the center of the bottom surface of the upper case (41) of the magazine mechanism (4).

5. The firing pin drive mechanism for an electric nail gun according to claim 4.

6. The sealed space of the energy storage mechanism (3) is filled with an inert gas having a certain pre-pressure.

4. The firing pin drive mechanism for an electric nailer according to claim 1.

7. The start and stop operation of the drive motor (13) is controlled by a hand wrench (21) of the main body (2) and a controller (22) in the main body (2). When the hand wrench (21) is pressed down, the driving motor (13) is directly started and operated; The stop of the operation of the drive motor (13) is controlled by the controller (22) in a delayed manner. The controller (22) detects the operating current of the drive motor (13) in real time, compares the detected current signal with a stored current setting value, and when the current signal exceeds the current setting value, immediately cuts off the power supply to the drive motor (13) to stop its operation.

4. The firing pin drive mechanism for an electric nailer according to claim 1.

8. The current setting value is smaller than the maximum current value during operation of the drive motor (13).

8. The firing pin drive mechanism for an electric nail gun according to claim 7.

Images