Compact mechanical-electronic dual-purpose ball lock

Abstract

The present utility model relates to a compact mechanical-electronic dual-purpose ball lock, comprising a front ball lock body, a rear ball lock body and a transmission rod assembly connected between the front ball lock body and the rear ball lock body. The front ball lock body comprises a front housing, wherein a lock cylinder structure and a clutch structure are provided in the front housing, the clutch structure being driven by the lock cylinder structure to transmittingly engage with the transmission rod assembly; the lock cylinder structure comprises a lock cylinder assembly, an output end of the lock cylinder assembly being drivingly connected to a slidably-arranged push block; and the clutch structure comprises a clutch head and a clutch plate, the clutch head being fixedly connected to one end of the transmission rod assembly, the clutch plate being slidably connected to one side of the push block, with a transmission lever being further provided between the push block and the clutch plate, and the push block pushing the transmission lever to act, such that the clutch plate moves towards the clutch head and transmittingly fits into the clutch head. By means of the transmission of the transmission lever, the present ball lock enables the movement directions of the push block and the clutch plate to be set horizontally relative to each other, such that the front ball lock body is more compact, thus further reducing the size of the front ball lock body.

Description

A compact mechanical and electronic dual-purpose ball lock Technical Field

[0001] The utility model relates to the field of ball locks, in particular to a compact mechanical and electronic dual-purpose ball lock. Background Art

[0002] With the rise of smart technology, more and more consumers are favoring smart products, with smart door locks experiencing rapid growth in recent years. In overseas markets, ball locks with passwords and mechanical keys have gained widespread recognition. Due to their low price and ease of use, they have gradually replaced three-bar and ball lock mechanical locks on the market. The current state-of-the-art technologies for ball-type electronic door locks are described below:

[0003] Prior art: Chinese patent number CN202021271015.9, titled: A mechanical and electronic password dual-purpose door lock, the disclosed technical solution includes a lock body, a lock head, and a lock core transmission assembly, a mechanical lock core and an electronic switch assembly arranged on the lock head. The electronic switch assembly includes an electronic control module, a drive module, a pull-piece transmission module and a clutch pin. When in use, the drive module pushes the pull-piece transmission module to engage the clutch pin. In the prior art, the drive module and the clutch pin move in different directions, so that the installation method of the drive module occupies the axial space of the lock head, and the transmission method is complex and occupies a lot of space, making it difficult to reduce the size of the door lock. Therefore, the applicant provides a new solution to the above-mentioned prior art problems through structural improvement and perfection for consumers to choose and use. Utility Model Content

[0004] The purpose of the present invention is to solve the above existing problems and provide an electrical connector with a simple and reasonable structure and a base using the electrical connector. Its main function is to reduce the size of the front ball lock body and make the front ball lock body more compact.

[0005] A compact mechanical and electronic dual-purpose ball lock comprises a front ball lock body, a rear ball lock body and a transmission rod assembly connected between the front and rear ball lock bodies; the front ball lock body comprises a front shell body, a lock core structure and a clutch structure are arranged in the front shell body, the clutch structure is driven by the lock core structure to cooperate with the transmission rod assembly, the lock core structure comprises a lock core assembly, the output end of the lock core assembly is driven to be connected to a sliding push block; the clutch structure comprises a clutch head and a clutch plate, the clutch head is fixedly connected to one end of the transmission rod assembly, the clutch plate is slidably connected to one side of the push block, and a transmission lever is further provided between the push block and the clutch plate, the push block pushes the transmission lever to move the clutch plate toward the clutch head and engage with the clutch head.

[0006] The purpose of the utility model can also be solved by the following technical measures:

[0007] As a more specific solution, the front shell is fastened to a support base, and a main control board is also fastened to the bottom of the support base. A first position sensing switch and a second position sensing switch are provided on the main control board, and one end of the transmission rod assembly is connected to a positioning block that cooperates with the first position sensing switch and the second position sensing switch.

[0008] As a further solution, the transmission lever is a curved arm structure and includes a first swing arm and a second swing arm. A rotating shaft fulcrum for swinging hinge is provided between the first swing arm and the second swing arm. The first swing arm moves against the outer side of the push block, and the second swing arm moves against the outer side of the clutch plate.

[0009] As a further solution, the lock core assembly includes a mechanical lock core and a motor arranged adjacent to each other, and a push block seat for linear sliding is connected to the rotating shaft of the motor, and the push block is connected to the push block seat and is placed between the mechanical lock core and the first swing arm; a cavity is provided in the push block seat, and a first spring is provided in the cavity and is sleeved on the outside of the rotating shaft, and a pressure rod is provided on the rotating shaft and cooperates with the first spring to form a screw rod as it rotates.

[0010] As a further solution, the support base is provided with a lock core cavity for installing a mechanical lock core, a motor cavity for installing a motor, a slide groove suitable for the linear sliding of the push block seat, an axle seat for being hinged to the rotating shaft fulcrum, and a battery cavity for installing a battery, and a cover plate is fastened to the top of the support base, through which the mechanical lock core, motor, push block, push block seat and transmission lever are fixed to the support base.

[0011] As a further solution, the clutch head is provided with a clutch groove suitable for the clutch plate to be inserted or removed, the front shell is provided with a guide groove corresponding to the clutch groove, the outer end of the clutch plate is provided with two limiting parts that cooperate with the guide groove, and two second springs are provided on both sides of the clutch plate to abut against the guide groove and the limiting parts. The clutch plate slides elastically in the guide groove through the second spring, and a contact extends from the clutch plate to abut against the second swing arm.

[0012] As a further solution, a support frame is fastened to the top of the cover plate, a control panel with a function keyboard is fastened to the bottom of the support frame, the control panel is electrically connected to the main control board, a fingerprint recognition module electrically connected to the main control board is connected to the center of the support frame, a control panel is connected to the top of the support frame, a fingerprint hole is provided on the control panel corresponding to the fingerprint recognition module, and a flexible keyboard is provided at the bottom of the control panel to cooperate with the function keyboard.

[0013] As a further solution, an arc-shaped retaining ring extends from the support seat, and the positioning block is rotatably set in the arc-shaped retaining ring, and three bayonet holes are respectively opened on the inner side of the arc-shaped retaining ring corresponding to the three sensing positions of the positioning block. A straight channel is opened on the positioning block, and a third spring and a steel ball are installed in the straight channel in sequence. When the arc-shaped retaining ring and the positioning block rotate relative to each other, the steel ball is selectively engaged in one of the bayonet holes through the third spring.

[0014] As a further solution, the transmission rod assembly includes a square locking rod and a transmission rod inserted in the square locking rod, the clutch head is integrally connected to one end of the square locking rod, the other end of the square locking rod is connected to the rear ball lock body, the positioning block is eccentrically connected to one end of the transmission rod, and the rear ball lock body is provided with a knob connected to the other end of the transmission rod.

[0015] As a further solution, a clutch cavity suitable for accommodating the clutch head is provided on the front shell, and a cover plate is fastened to the front shell, through which the clutch head and the clutch plate are respectively fixed in the clutch cavity and the guide groove, and a linear through groove is provided on the cover plate to cooperate with the contact guide.

[0016] The utility model discloses a compact mechanical and electronic dual-purpose ball lock. This ball lock is driven by a transmission lever, so that the movement directions of the push block and the clutch plate can be set horizontally with each other, so that the lock core structure is adjacent to and close to one side of the clutch structure, making the front ball lock body more compact. In addition, the transmission lever is swung to the free gap between the push block, the clutch plate and the front shell body, so that the transmission structure does not occupy the axial space of the front ball lock body, which helps to further reduce the size of the front ball lock body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic cross-sectional view of an embodiment of the present invention.

[0018] FIG2 is a schematic diagram of the exploded structure of the present invention.

[0019] FIG3 is a schematic diagram of the clutch structure in the present invention in an engaged state.

[0020] FIG4 is a schematic diagram of the clutch structure in the present invention in a disconnected state.

[0021] Figure 5 is a schematic diagram of the lock core assembly and push block structure of the utility model.

[0022] FIG6 is a schematic cross-sectional view of the clutch structure of the present invention.

[0023] FIG7 is a schematic diagram of the cooperation between the positioning block and the position sensing switch in the present invention. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] As shown in Figures 1 to 7, a compact mechanical and electronic dual-purpose ball lock includes a front ball lock body 1, a rear ball lock body 2 and a transmission rod assembly 3 connected between the front and rear ball lock bodies 2. The front ball lock body 1 includes a front shell 4, in which a lock core structure 5 and a clutch structure 6 are provided. The clutch structure 6 is driven by the lock core structure 5 to cooperate with the transmission rod assembly 3. The lock core structure 5 includes a lock core assembly, and the output end of the lock core assembly is driven to connect a sliding push block 7; the clutch structure 6 includes a clutch head 8 and a clutch plate 9. The clutch head 8 is fixedly connected to one end of the transmission rod assembly 3, the clutch plate 9 is slidably connected to one side of the push block 7, and a transmission lever 10 is further provided between the push block 7 and the clutch plate 9. The push block 7 pushes the transmission lever 10 to move, causing the clutch plate 9 to move toward the clutch head 8 and engage with the clutch head 8.

[0026] This ball lock is driven by a transmission lever 10, so that the movement directions of the push block 7 and the clutch plate 9 can be set horizontally with each other, so that the lock core structure 5 is adjacent to and close to one side of the clutch structure 6, making the front ball lock body more compact. In addition, the transmission lever 10 is swung to the free gap 4 between the push block 7, the clutch plate 9 and the front shell body, so that the transmission structure does not occupy the axial space of the front ball lock body 1, which helps to further reduce the size of the front ball lock body.

[0027] The transmission lever 10 has a curved arm structure and includes a first swing arm 1001 and a second swing arm 1002. A rotating shaft fulcrum 1003 for swinging and hinged connection is provided between the first swing arm 1001 and the second swing arm 1002. The first swing arm 1001 movably contacts the outer side of the push block 7, and the second swing arm 1002 movably contacts the outer side of the clutch plate 9. The transmission lever 10 with a curved arm structure can fit the curvature of the front housing 4, so that the transmission lever 10 can fully utilize the free space 4 between the push block 7, the clutch plate 9 and the front housing, making the front ball lock body 1 more compact.

[0028] The lock core assembly includes a mechanical lock core 11 and a motor 12 arranged adjacent to each other, and a linearly sliding push block seat 71 is connected to the rotating shaft 121 of the motor 12, and the push block 7 is connected to the push block seat 71 and is placed between the mechanical lock core 11 and the first swing arm 1001; a cavity 72 is provided in the push block seat 71, and a first spring 13 is provided in the cavity 72 and is sleeved on the outside of the rotating shaft 121, and a pressure rod 122 is provided on the rotating shaft 121, which rotates with the first spring 13 to form a screw rod.

[0029] When the above structure is used, the front ball lock body 1 receives the unlocking command, the motor 12 works to drive the rotating shaft 121 to drive the pressure rod 122 to rotate, and the first spring 13 fixed in the cavity 72 immediately cooperates with the pressure rod 122 to form a screw, gradually pushing the first spring 13 to the side away from the motor 12. When the first spring 13 is compressed and the elastic potential energy increases, the first spring 13 pushes the push block seat 71 and the push block 7 to move toward the first swing arm 1001 and push the first swing arm 1001 to swing outward, so that the second swing arm 1001 swings inward and pushes the clutch plate 9 to move horizontally and insert into the clutch head 8 to complete the engagement with the transmission rod assembly 3, so that the door can be opened smoothly when the front ball lock body 1 is turned; and when the ball lock has no power or the user uses the key to open the door, the key turns the mechanical lock cylinder 11, the lock tongue of the mechanical lock cylinder 11 moves axially and directly pushes the push block 7, so that the push block 7 can push the first swing arm 1001 horizontally.

[0030] In addition, a lock hole 403 suitable for inserting a key is provided on the front housing 4 corresponding to the mechanical lock core 11 .

[0031] The clutch head 8 is provided with a clutch groove 801 suitable for inserting or leaving the clutch plate 9. The front housing 4 is provided with a guide groove 401 corresponding to the clutch groove 801. The outer end of the clutch plate 9 is provided with two limit portions 91 that guide and cooperate with the guide groove 401. Two second springs 14 are provided on both sides of the clutch plate 9, which abut between the guide groove 401 and the limit portions 91. The second springs 14 abut between the guide groove 401 and the limit portions 91. The clutch plate 9 elastically slides in the guide groove 401 via the second springs 14. The guide groove 401 can ensure that the clutch plate 9 can slide linearly. A contact 92 extends from the clutch plate 9 to abut against the second swing arm 1002.

[0032] After the front ball lock body 1 receives the door locking command, the motor 12 drives the rotating shaft 121 to rotate and drives the pressure rod 122 to rotate in the opposite direction, gradually pushing the first spring 13 to the side close to the motor 12. When the first spring 13 is compressed and the elastic potential energy increases to the other side, the first spring 13 pushes the push block seat 71 to move in the direction of the motor and makes the push block 7 leave the first swing arm 1001. After the transmission lever 10 withdraws the force of the lock core assembly, the elastic potential energy previously stored by the second spring 14 when unlocking is released, pushing the clutch plate 9 to leave the clutch slot 801 and engage. At the same time, the sliding clutch plate 9 pushes the second swing arm 1002 horizontally again, thereby resetting the transmission lever 10, and the above-mentioned contact 92 is convenient to maintain contact with the second swing arm 1002.

[0033] The front shell 4 is fastened to the support base 15, and the support base 15 is provided with a lock core cavity 151 for installing the mechanical lock core 11, a motor cavity 152 for installing the motor 12, a slide groove 153 suitable for the linear sliding of the push block seat 71, an axle seat 154 for being hinged to the rotating shaft fulcrum 1003, and a battery cavity 155 for installing the battery 16. A cover plate 17 is fastened to the top of the support base 15, and the mechanical lock core 11, motor 12, push block 7, push block seat 71 and transmission lever 10 are fixed to the support base 15 through the cover plate 17. A clearance hole 171 is also provided on the cover plate 17 corresponding to the first swing arm 1001. The above-mentioned structure can be fixed in the corresponding cavity through the assembly connection of the cover plate 17 and the support base 15. The assembly is simple and the production efficiency can be improved.

[0034] A main control board 18 is also fastened to the lower side of the support base 15. The main control board 18 is electrically connected to the battery 16 and is provided with a first position sensing switch 181 and a second position sensing switch 182. One end of the transmission rod assembly 3 is connected to a positioning block 19 that is in dynamic contact with the first position sensing switch 181 and the second position sensing switch 182.

[0035] The positioning block 19 is an eccentric structure, one end of which is connected to the transmission rod assembly 3, and the three sensing positions corresponding to the other end are respectively at 9 o'clock, 12 o'clock and 3 o'clock. When the positioning block 19 is opened to 9 o'clock, the positioning block 19 triggers the first position sensing switch 181, and the ball lock is in a normally open state (if it is not locked, you can enter and exit at any time by turning the front ball lock body 1). When it is opened to 3 o'clock, the positioning block 19 triggers the second position sensing switch 182, and the ball lock is in an anti-lock state (after returning to the lock, only the administrator's fingerprint or password can unlock it, and the fingerprint or password of ordinary users cannot open it); when the positioning block 19 is opened at the 12 o'clock position, both position sensing switches cannot detect. At this time, after the door is closed, the lock is automatically locked (at this time, the front ball lock body 1 is idling, but the rear ball lock body 2 can be opened at any time).

[0036] The main control board 18 is provided with a charging socket 183 , and the front housing 4 is provided with a charging avoidance opening 404 corresponding to the charging socket 183 .

[0037] An arc-shaped retaining ring 156 extends from the support seat 15, and the positioning block 19 is rotatably arranged in the arc-shaped retaining ring 156, and three bayonet holes 157 are respectively opened on the inner side of the arc-shaped retaining ring 156 corresponding to the three sensing positions of the positioning block 19, and a linear channel 191 is opened on the positioning block 19, and a third spring 20 and a steel ball 21 are sequentially installed in the linear channel 191. When the arc-shaped retaining ring 156 and the positioning block 19 rotate relative to each other, the steel ball 21 is selectively engaged in one of the bayonet holes 157 through the third spring 20; the three bayonet holes 157 also correspond to the 9 o'clock direction, the 12 o'clock direction and the 3 o'clock direction respectively. The elastically moving steel ball 21 cooperates with the bayonet holes 157, so that the front ball lock body 1 has a damping sense when it rotates, which is convenient for the user to judge the position of the front ball lock body 1.

[0038] In addition, a stop block 158 extends from the opening of the arc-shaped retaining ring 156, and the stop block 158 allows the positioning block 19 to rotate relatively only between the 9 o'clock direction, the 12 o'clock direction and the 3 o'clock direction.

[0039] A support frame 22 is fastened to the top of the cover plate 17, and a control panel 23 with a function keyboard is fastened to the bottom of the support frame 22. The control panel 23 is electrically connected to the main control board 18. A fingerprint recognition module 24 electrically connected to the main control board 18 is connected to the center of the support frame 22. A control panel 25 is connected to the top of the support frame 22. The control panel 25 is provided with a fingerprint hole 251 corresponding to the fingerprint recognition module 24, and a flexible keyboard that cooperates with the function keyboard is provided at the bottom of the control panel 25. When unlocking, the user can identify the fingerprint through the fingerprint recognition module 24 to generate an unlocking command, or the user can enter a password through the control panel 25 to generate an unlocking command.

[0040] The transmission rod assembly 3 includes a square locking rod 31 and a transmission rod 32 inserted in the square locking rod 31. The clutch head 8 is integrally connected to one end of the square locking rod 31, and the other end of the square locking rod 31 is connected to the rear ball lock body 2. The positioning block 19 is eccentrically connected to one end of the transmission rod 32. The rear ball lock body 2 is provided with a knob 26 connected to the other end of the transmission rod 32; this structure can rotate the transmission rod 32 through the knob 26, so that the positioning block 19 on the transmission rod 32 is rotated to the 12 o'clock position, so that the front ball lock body 1 remains idle, thereby realizing the locking function.

[0041] The front shell 4 is provided with a clutch cavity 402 suitable for accommodating the clutch head 8, and a cover plate 27 is fastened to the front shell 4. The clutch head 8 and the clutch plate 9 are respectively fixed in the clutch cavity 402 and the guide groove 401 through the cover plate 27, and a linear through groove 271 is provided on the cover plate 27 to guide and cooperate with the contact 92; the clutch head 8 and the clutch plate 9 can be fixed by the cover plate 27.

[0042] The above is a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A compact mechanical and electronic dual-purpose ball lock, comprising a front ball lock body (1), a rear ball lock body (2) and a transmission rod assembly (3) connected between the front and rear ball lock bodies (2), wherein the front ball lock body (1) comprises a front housing (4), wherein a lock core structure (5) and a clutch structure (6) are arranged in the front housing (4), wherein the clutch structure (6) is driven by the lock core structure (5) to cooperate with the transmission rod assembly (3), and wherein: The lock core structure (5) comprises a lock core assembly, the output end of which is driven by a push block (7) which is slidably arranged; the clutch structure (6) comprises a clutch head (8) and a clutch plate (9), the clutch head (8) being fixedly connected to one end of the transmission rod assembly (3), the clutch plate (9) being slidably connected to one side of the push block (7), and a transmission lever (10) being provided between the push block (7) and the clutch plate (9), the push block (7) pushing the transmission lever (10) to move, so that the clutch plate (9) moves toward the clutch head (8) and is in transmission engagement with the clutch head (8).

2. A compact mechanical and electronic dual-purpose ball lock according to claim 1, characterized in that: The front housing (4) is fastened to a support base (15), a main control board (18) is also fastened to the lower side of the support base (15), a first position sensing switch (181) and a second position sensing switch (182) are provided on the main control board (18), and one end of the transmission rod assembly (3) is connected to a positioning block (19) that is in dynamic contact with the first position sensing switch (181) and the second position sensing switch (182).

3. A compact mechanical and electronic dual-purpose ball lock according to claim 1 or 2, characterized in that: The transmission lever (10) is in a crank arm structure and comprises a first swing arm (1001) and a second swing arm (1002); a rotating shaft fulcrum (1003) for swinging and hinged connection is provided between the first swing arm (1001) and the second swing arm (1002); the first swing arm (1001) movably contacts the outer side of the push block (7); and the second swing arm (1002) movably contacts the outer side of the clutch plate (9).

4. A compact mechanical and electronic dual-purpose ball lock according to claim 3, characterized in that: The lock core assembly comprises a mechanical lock core (11) and a motor (12) which are arranged adjacent to each other; a push block seat (71) which slides linearly is connected to the rotating shaft (121) of the motor (12); the push block (7) is connected to the push block seat (71) and is arranged between the mechanical lock core (11) and the first swing arm (1001); a cavity (72) is arranged in the push block seat (71); a first spring (13) which is sleeved on the outside of the rotating shaft (121) is arranged in the cavity (72); and a pressure rod (122) which rotates with the rotating shaft (121) and cooperates with the first spring (13) to form a screw rod.

5. A compact mechanical and electronic dual-purpose ball lock according to claim 2, characterized in that: The support base (15) is provided with a lock core cavity (151) for installing a mechanical lock core (11), a motor cavity (152) for installing a motor (12), a slide groove (153) suitable for linear sliding of a push block seat (71), an axle seat (154) for being hinged to a rotating shaft fulcrum (1003), and a battery cavity (155) for installing a battery (16), and a cover plate (17) is fastened to the top of the support base (15), and the mechanical lock core (11), the motor (12), the push block (7), the push block seat (71), and the transmission lever (10) are fixed to the support base (15) via the cover plate (17).

6. A compact mechanical and electronic dual-purpose ball lock according to claim 1, characterized in that: The clutch head (8) is provided with a clutch groove (801) suitable for the clutch plate (9) to be inserted into or removed from the clutch head; the front housing (4) is provided with a guide groove (401) corresponding to the clutch groove (801); the outer end of the clutch plate (9) is provided with two limit portions (91) which are guided and matched with the guide groove (401); two second springs (14) are provided on both sides of the clutch plate (9) and are abutted between the guide groove (401) and the limit portions (91); the clutch plate (9) elastically slides in the guide groove (401) via the second springs (14); and a contact (92) which is abutted and matched with the second swing arm (1002) is extended from the clutch plate (9).

7. A compact mechanical and electronic dual-purpose ball lock according to claim 5, characterized in that: A support frame (22) is fastened to the top of the cover plate (17); a control panel (23) with a functional keyboard is fastened to the bottom of the support frame (22); the control panel (23) is electrically connected to the main control panel (18); a fingerprint recognition module (24) electrically connected to the main control panel (18) is connected to the center of the support frame (22); a control panel (25) is connected to the top of the support frame (22); a fingerprint hole (251) is provided on the control panel (25) corresponding to the fingerprint recognition module (24); and a flexible keyboard cooperating with the functional keyboard is provided at the bottom of the control panel (25).

8. A compact mechanical and electronic dual-purpose ball lock according to claim 7, characterized in that: An arc-shaped retaining ring (156) extends from the support seat (15), the positioning block (19) is rotatably arranged in the arc-shaped retaining ring (156), and three bayonet holes (157) are respectively provided on the inner side of the arc-shaped retaining ring (156) corresponding to three sensing positions of the positioning block (19), the positioning block (19) is provided with a linear channel (191), a third spring (20) and a steel ball (21) are sequentially installed in the linear channel (191), and the steel ball (21) is selectively engaged in one of the bayonet holes (157) through the third spring (20) when the arc-shaped retaining ring (156) and the positioning block (19) rotate relative to each other.

9. A compact mechanical and electronic dual-purpose ball lock according to claim 5, characterized in that: The transmission rod assembly (3) comprises a square lock rod (31) and a transmission rod (32) inserted into the square lock rod (31); the clutch head (8) is integrally connected to one end of the square lock rod (31); the other end of the square lock rod (31) is connected to the rear ball lock body (2); the positioning block (19) is eccentrically connected to one end of the transmission rod (32); and the rear ball lock body (2) is provided with a knob (26) connected to the other end of the transmission rod (32).

10. A compact mechanical and electronic dual-purpose ball lock according to claim 3, characterized in that: The front housing (4) is provided with a clutch cavity (402) suitable for accommodating the clutch head (8); a cover plate (27) is fastened to the front housing (4); the clutch head (8) and the clutch plate (9) are respectively fixed in the clutch cavity (402) and the guide groove (401) by the cover plate (27); and a linear through groove (271) is provided on the cover plate (27) for guiding and cooperating with the contact (92).

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