Manual and automatic combined wire pulling device

Abstract

The utility model relates to the technical field of wire pulling devices for motorcycles or electric vehicles, and in particular to a manual and automatic combined wire pulling device, comprising a shell, an unlocking wire, a first wire pulling slider provided in the shell, the first wire pulling slider having an unlocking position and a reset position, an electric drive mechanism and a manual wire pulling slider for driving the first wire pulling slider to move to the unlocking position provided in the shell, the manual wire pulling slider being connected to the first wire pulling slider, the unlocking wire pulling slider and the manual wire pulling slider being separately arranged at the lateral ends of the shell, a second wire pulling slider connected to the unlocking wire being further provided on the shell, the second wire pulling slider being slidably arranged on the shell along the lateral direction, an elastic member for realizing the linkage between the second wire pulling slider and the first wire pulling slider being provided between the second wire pulling slider and the first wire pulling slider, and the beneficial effects of the utility model are: extending the service life of the wire pulling device.

Description

Technical Field

[0001] The utility model relates to the technical field of wire pulling devices for motorcycles or electric vehicles, in particular to a manual and automatic combined wire pulling device. Background Art

[0002] The seat cushion on a motorcycle or electric vehicle usually needs to be unlocked before it can be opened. For this purpose, a pull-wire device is provided for unlocking the seat cushion by pulling the unlocking wire. The patent document with patent application number CN202110277425.7 discloses a manual and automatic combined pull-wire device, including a shell and an unlocking wire. The unlocking wire runs through the shell, and the shell is provided with a first pull-wire slider connected to the unlocking wire. The first pull-wire slider is arranged on the shell along a transverse sliding motion. The first pull-wire slider has an unlocking position and a reset position. An automatic driving mechanism is provided in the shell to drive the first pull-wire slider to move to the unlocking position or the reset position. A driving mechanism for driving the first pull-wire slider to move to the unlocking position is provided in the shell. The invention discloses a manual driving mechanism for moving the automatic driving mechanism, wherein the automatic driving mechanism comprises a motor and a driving block, wherein the driving block is arranged on the shell body along a transverse sliding manner, the motor drives the driving block to move, and the driving block directly or indirectly drives the first wire pulling slider to move, wherein the manual driving mechanism comprises a manual wire and a second wire pulling slider connected to the manual wire, the manual wire runs through the shell body, the second wire pulling slider is arranged on the shell body along a transverse sliding manner, the second wire pulling slider is linked to the first wire pulling slider, when the second wire pulling slider drives the first wire pulling slider to move to the unlocking position, the first wire pulling slider can be arranged on the driving block along a transverse sliding manner, and the shell body also comprises an elastic member for driving the first wire pulling slider to move to the reset position.

[0003] The above-mentioned wire pulling device has the following defects during actual use: 1. In order to ensure that the driving block can move into place to meet the unlocking conditions in the automatic unlocking mode, it is necessary to set the driving stroke of the motor to be greater than the moving stroke of the unlocking wire. When the driving block moves to the unlocking position, the motor is still in a working state, and the motor will be blocked, which may easily cause damage to the transmission components and burn out of the motor; 2. The driving block is provided with a rack that meshes with the gear set. When the motor fails and keeps rotating, broken teeth are likely to occur between the rack and the gear set. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a manual and automatic combined wire pulling device to extend the service life of the wire pulling device in view of the deficiencies of the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a manual and automatic combined wire pulling device, comprising a shell and an unlocking wire, a first wire pulling slider is provided in the shell, the first wire pulling slider is slidably arranged on the shell along the horizontal direction, the first wire pulling slider has an unlocking position and a reset position, an electric drive mechanism and a manual wire pulling cable are provided in the shell for driving the first wire pulling slider to move to the unlocking position, the electric drive mechanism comprises a driving block for driving the first wire pulling slider to move, a motor for driving the driving block to move and a gear set for transmitting the power of the motor to the driving block, the driving block is slidably arranged on the shell along the horizontal direction, the manual wire pulling cable is connected to the first wire pulling slider, the unlocking wire and the manual wire pulling cable are separately arranged at two ends of the shell, and it is characterized in that: a second wire pulling slider connected to the unlocking wire is provided on the shell, the second wire pulling slider is slidably arranged on the shell along the horizontal direction, and an elastic member is provided between the second wire pulling slider and the first wire pulling slider to realize the linkage between the two.

[0006] The utility model with the above-mentioned characteristics: an elastic member is arranged between the first wire-pull slider and the second wire-pull slider to prevent the first wire-pull slider from separating from the second wire-pull slider, and the elastic force generated by the deformation of the elastic member is made greater than the pulling force of the unlocking wire. During automatic or manual unlocking, the first wire-pull slider can drive the second wire-pull slider to move and thus unlock; when the first wire-pull slider moves to the unlocking position driven by the driving block, since the motor stroke is set to be greater than the stroke of the unlocking wire, the driving block still keeps moving forward. At this time, the first wire-pull slider separates from the second wire-pull slider and continues to move forward with the driving block until the motor completes its stroke, thereby preventing the motor from stalling and protecting the motor.

[0007] A further arrangement of the utility model is that a mounting frame is provided at one end of the first wire pull slider facing the second wire pull slider, the second wire pull slider comprises a plug-in frame plugged with the mounting frame, and a connecting block connected with the unlocking wire, the mounting frame is provided with a plug-in slot plugged with the plug-in frame, mounting columns are provided on the two lateral inner walls of the plug-in frame, the elastic member is a spring, both ends of the spring are respectively mounted on the mounting columns, and the outer diameter of the spring is greater than the width of the plug-in slot.

[0008] The utility model with the above-mentioned characteristics: a plug-in connection method is adopted between the first wire pull slider and the second wire pull slider, which is convenient for assembly and positioning, and improves the assembly accuracy and efficiency of the two; combined with the installation structure required by the spring, a mounting column is provided on the second wire pull slider for installing the spring, thereby improving the installation stability of the spring; the outer diameter of the spring is set to be larger than the width of the plug-in slot, which can prevent the plug-in frame from falling off from the installation frame after assembly is completed.

[0009] A further arrangement of the utility model is: a first U-shaped connecting frame is provided at one end of the first wire pull slider facing the second wire pull slider, the second wire pull slider includes a second U-shaped connecting frame and a connecting block connected to the unlocking wire, the first U-shaped connecting frame and the second U-shaped connecting frame are fitted together to obtain a chamber for installing an elastic member, a first mounting protrusion is provided in the first U-shaped connecting frame, and a second mounting protrusion is provided in the second U-shaped connecting frame, the elastic member is a tension spring, and both ends of the tension spring are respectively mounted on the first mounting protrusion and the second mounting protrusion.

[0010] The utility model with the above-mentioned characteristics: the use of a U-shaped connecting frame makes the connection structure between the first wire pulling slider and the second wire pulling slider simpler and more intuitive, reduces the complexity of installation and disassembly, and improves assembly efficiency and accuracy; combined with the installation structure required for the tension spring, a mounting protrusion is provided to facilitate the installation of the tension spring pin, thereby improving the installation efficiency and stability of the tension spring.

[0011] A further configuration of the utility model is: the driving block includes a driving block body and a linkage block arranged on its end face, a linkage frame is arranged in the first wire pulling slider, the linkage block can move laterally in the linkage frame, an induction switch is arranged on the shell to prompt the driving block to reset, one side edge of the driving block body includes a first smooth section, a second smooth section and a rack section located between the first smooth section and the second smooth section, the gear group is respectively meshed with the motor and the rack section, and at least one group of anti-breaking tooth structures is arranged in the shell to be located in the movement direction of the driving block and can prompt the driving block to separate or mesh with the gear group.

[0012] The utility model with the above-mentioned characteristics: the driving block moves to the unlocking position or the reset position under the drive of the motor. When the motor loses control after the driving block reaches the unlocking position or the reset position, if there is no anti-tooth breakage structure, the driving block still maintains meshing transmission with the gear set, and the teeth will break and wear. By setting the anti-tooth breakage structure, the driving block is separated from the gear set, and the out-of-control motor is in an idling state, which effectively avoids damage to the motor and the gear set.

[0013] A further configuration of the utility model is that anti-breaking tooth structures are provided on both sides of the movement direction of the driving block, and the anti-breaking tooth structures include a pushing block and a first spring slidably arranged in the shell, one end of the first spring is connected to the pushing block, and the other end is against the inner wall of the shell.

[0014] The utility model with the above characteristics: the driving block moves forward when driven by the out-of-control motor to squeeze the pushing block. Since only a small section of the rack is provided on the driving block, the driving block can be separated from the gear set when squeezing the pushing block. When the motor reverses, the elastic force of the first spring prompts the driving block to return to its position and assists in pushing the driving block to re-engage with the gear set.

[0015] A further configuration of the utility model is: the anti-tooth breakage structure and the induction switch are respectively arranged on both sides of the movement direction of the driving block, the anti-tooth breakage structure includes a pushing block and a first spring slidably arranged in the shell, one end of the first spring is connected to the pushing block, and the other end is against the inner wall of the shell, and the contact of the induction switch is arranged toward the driving block.

[0016] The utility model with the above-mentioned characteristics: the driving block moves forward under the drive of the out-of-control motor to squeeze the pushing block. Since only a small section of the rack is arranged on the driving block, the driving block can be separated from the gear group when squeezing the pushing block. When the motor reverses, the elastic force of the first spring prompts the driving block to return to its position and assists in pushing the driving block to re-engage with the gear group; the contact structure of the induction switch is similar to the anti-breaking tooth structure. Setting it on one side of the movement direction of the driving block can replace the anti-breaking tooth structure. At the same time, when the driving block is driven by the motor, it drives the first wire pull slider to move toward the unlocking position. After the first wire pull slider reaches the unlocking position, the driving block contacts the contact of the induction switch. The motor receives the signal and starts to reverse to drive the driving block to reset. By setting a linkage frame on the first wire pull slider for the linkage block to move in it, the first wire pull slider will not be affected when the driving block is reset. The reset of the first wire pull slider is achieved by pressing the seat cushion.

[0017] A further configuration of the utility model is that: an abutment wing plate is provided on the outer peripheral wall of the first wire pulling slider, and an induction switch for detecting that the first wire pulling slider moves to an unlocked position is provided in the shell, and the contact of the induction switch is located below the abutment wing plate. The abutment wing plate can trigger the contact of the induction switch, and the motor reverses to drive the drive block to reset.

[0018] The utility model with the above-mentioned characteristics: the driving block, driven by the motor, drives the first wire pull slider toward the unlocking position. After the first wire pull slider reaches the unlocking position, the resistance wing plate thereon triggers the contact of the sensing switch. The motor receives the signal and starts to reverse to drive the driving block to reset. By providing a linkage frame on the first wire pull slider for the linkage block to move in it, the driving block will not affect the first wire pull slider when it is reset. The reset of the first wire pull slider is achieved by pressing the seat cushion.

[0019] A further arrangement of the utility model is: the shell includes a base, an outer shell covering one side of the base, and a bottom shell covering the other side of the base; a chamber for installing a first wire pull slider and a second wire pull slider is formed between the base and the outer shell; a chamber for installing an electric drive mechanism is formed between the base and the bottom shell; the unlocking wire and the manual wire pull are respectively installed on two side surfaces of the outer shell; a slide groove for installing the first wire pull slider is provided on the base; a first wire pull head installation entrance for installing a wire head of the manual pull wire is provided on the first wire pull slider; and a second wire pull slider is provided with a second wire pull head installation entrance for installing a wire head of the unlocking wire.

[0020] The utility model with the above-mentioned characteristics: the first wire pull slider and the second wire pull slider are arranged on one side of the base, and the electric drive mechanism is arranged on the other side of the base, and the two are separated by the base, so that the internal structure of the wire pull device is clear and does not interfere with each other; the unlocking pull wire and the manual pull wire are respectively installed on the two sides of the outer shell, which makes the operation more intuitive and avoids misoperation; the slide groove design on the base provides a clear motion trajectory for the first wire pull slider, ensuring the accurate and stable movement of the slider.

[0021] The utility model is further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an exploded view of an embodiment of the utility model.

[0023] Figure 2 This is a schematic diagram of the structure of the third embodiment of the utility model after removing the outer shell.

[0024] Figure 3 The following are structural schematic diagrams of three examples of the present invention after the bottom shell is removed.

[0025] Figure 4 This is an exploded view of the first embodiment of the present utility model.

[0026] Figure 5 This is an exploded view of the second embodiment of the present utility model.

[0027] Figure 6 This is a schematic diagram of the structure of the fourth embodiment of the utility model after the bottom shell is removed.

[0028] Figure 7 This is a schematic diagram of the structure of the fourth embodiment of the utility model after the outer shell is removed.

[0029] Figure 8 It is a structural schematic diagram of the first wire pulling slider and the driving block of an embodiment of the utility model. DETAILED DESCRIPTION

[0030] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0031] like Figure 1-8A manual and automatic combined wire pulling device is shown, comprising a shell 1, an unlocking wire 2, a first wire pulling slider 3 is provided in the shell 1, the first wire pulling slider 3 is slidably arranged on the shell 1 along the transverse direction, the first wire pulling slider 3 has an unlocking position and a reset position, an electric drive mechanism 4 and a manual wire pulling cable 5 for driving the first wire pulling slider 3 to move to the unlocking position are provided in the shell 1, the electric drive mechanism 4 comprises a driving block 41 for driving the first wire pulling slider 3 to move, a motor 42 for driving the driving block 41 to move and a gear set 43 for transmitting the power of the motor 42 to the driving block 41, the driving block 41 is slidably arranged on the shell 1 along the transverse direction, the manual wire pulling cable 5 is connected to the first wire pulling slider 3, the unlocking wire 2 and the manual wire pulling cable 5 are respectively arranged at the lateral ends of the shell 1, a second wire pulling slider 6 connected to the unlocking wire 2 is provided on the shell 1, the second wire pulling slider 6 is slidably arranged on the shell 1 along the transverse direction, and an elastic member 7 is provided between the second wire pulling slider 6 and the first wire pulling slider 3 to realize the linkage between the two.

[0032] Regarding the structural arrangement between the first wire-pulling slider and the second wire-pulling slider, there are the following two embodiments:

[0033] Embodiment 1: A mounting frame 31 is provided at one end of the first wire pull slider 3 facing the second wire pull slider 6, and the second wire pull slider 6 includes a plug-in frame 61 plugged into the mounting frame 31 and a connecting block 62 connected to the unlocking wire 2. A plug-in slot 311 plugged into the plug-in frame 61 is provided on the mounting frame 31, and mounting columns 63 are provided on the inner walls on both sides of the plug-in frame 61. The elastic member 7 is a spring, and both ends of the spring are respectively sleeved on the mounting columns 63. The outer diameter of the spring is larger than the width of the plug-in slot 311. During assembly, the mounting frame is first inserted into the plug-in slot so that the mounting frame is placed in the plug-in frame, and then the spring is assembled between the two mounting columns. Since the outer diameter of the spring is larger than the width of the plug-in slot, the plug-in mounting frame and the plug-in frame will not fall off during use.

[0034] Embodiment 2: A first U-shaped connecting frame 32 is provided at one end of the first wire pulling slider 3 facing the second wire pulling slider 6. The second wire pulling slider 6 includes a second U-shaped connecting frame 64 and a connecting block 62 connected to the unlocking wire 2. The first U-shaped connecting frame 32 and the second U-shaped connecting frame 64 are fitted together to obtain a chamber for installing the elastic member 7. A first mounting protrusion 33 is provided in the first U-shaped connecting frame 32, and a second mounting protrusion 65 is provided in the second U-shaped connecting frame 64. The elastic member 7 is a tension spring, and both ends of the tension spring are respectively mounted on the first mounting protrusion 33 and the second mounting protrusion 65.

[0035] The driving block 41 is provided with a linkage block 414, and a linkage frame 34 is provided in the first wire-pulling slider 3. The linkage block 414 can move laterally in the linkage frame 34. The shell 1 is provided with an induction switch 9 for causing the driving block 41 to reset. One side of the driving block 41 includes a first smooth section 411, a second smooth section 412 and a rack section 413 located between the first smooth section 411 and the second smooth section 412. The gear set 43 is respectively meshed with the motor 42 and the rack section 413. The shell 1 is provided with at least one group of anti-breakage tooth structures 8 located in the movement direction of the driving block 41, which can cause the driving block 41 to separate or mesh with the gear set 43.

[0036] Regarding the structure of the anti-breaking teeth structure and the induction switch, there are two embodiments as follows:

[0037] Embodiment three: Anti-breaking tooth structures 8 are provided on both sides of the movement direction of the driving block 41, and the anti-breaking tooth structure 8 includes a pushing block 81 and a first spring 82 which are slidably arranged in the shell 1. One end of the first spring 82 is connected to the pushing block 81, and the other end is against the inner wall of the shell 1. The anti-breaking tooth structure 8 can also include an anti-breaking box 83 embedded in the shell 1, and the pushing block 81 and the first spring 82 are both arranged in the anti-breaking box 83. A contact wing plate 35 is provided on the outer peripheral wall of the first wire pulling slider 3, and a sensing switch 9 for detecting that the first wire pulling slider 3 moves to the unlocking position is provided in the shell 1. The contact 91 of the sensing switch 9 is located below the contact wing plate 35. The contact wing plate 35 can trigger the contact 91 of the sensing switch 9, and the motor 42 reverses to drive the driving block 41 to reset.

[0038] Embodiment 4: The anti-tooth-breakage structure 8 and the induction switch 9 are respectively arranged on both sides of the movement direction of the driving block 41. The anti-tooth-breakage structure 8 includes a pushing block 81 and a first spring 82 which are slidably arranged in the shell 1. One end of the first spring 82 is connected to the pushing block 81, and the other end is against the inner wall of the shell 1. The anti-tooth-breakage structure 8 can also include an anti-breakage box 83 embedded in the shell 1. The pushing block 81 and the first spring 82 are both arranged in the anti-breakage box 83, and the contact 91 of the induction switch 9 is set toward the driving block 41.

[0039] The shell 1 includes a base 11, an outer shell 12 covering one side of the base 11, and a bottom shell 13 covering the other side of the base 11. A chamber for installing a first wire pull slider 3 and a second wire pull slider 6 is formed between the base 11 and the outer shell 12. A chamber for installing an electric drive mechanism 4 is formed between the base 11 and the bottom shell 13. The unlocking wire 2 and the manual wire 5 are respectively installed on the two sides of the outer shell 12. A slide groove 111 for installing the first wire pull slider 3 is provided on the base 11. The first wire pull slider 3 is provided with a first wire pull head installation entrance 36 for installing the wire head of the manual wire pull 5. The second wire pull slider 6 is provided with a second wire pull head installation entrance 66 for installing the wire head of the unlocking wire 2.

[0040] When the seat cushion lock is in the locked state, the first pull-wire slider is in the reset position, and when the seat cushion lock is in the unlocked state, the first pull-wire slider is in the unlocked position; when the electric drive mechanism is used to achieve automatic unlocking, the gear set meshes with the motor and the drive block at the same time, and the motor can drive the drive block to move back and forth horizontally. When unlocking, the motor drives the drive block to move in the direction of the manual pull wire, and the linkage block of the drive block resists the linkage frame of the first pull-wire slider, driving the first pull-wire slider to move in the direction of the manual pull wire. The second pull-wire slider is linked with the first pull-wire slider under the connection action of the elastic member. It is worth noting that the elastic force of the elastic member is greater than the pulling force generated by the unlocking wire. After the first pull-wire slider moves to the unlocked position, The seat cushion lock is unlocked. When the installation method of the sensing switch adopts the structure of Example 3, the abutting wing plate on the first wire pull slider triggers the sensing switch, and the motor receives a reverse signal to drive the drive block back. When the installation method of the sensing switch adopts the structure of Example 4, the drive block touches the sensing switch to trigger the sensing switch, and the motor receives a reverse signal to drive the drive block back. The return of the drive block does not affect the first wire pull slider, and the first wire pull slider remains stationary. When the seat cushion needs to be locked again, the user only needs to press the seat cushion. At this time, the unlocking wire pulls the second wire pull slider to move in the direction away from the manual wire pull, and the first wire pull slider moves to the reset position with the second wire pull slider under the connection action of the elastic member.

[0041] When the electric drive mechanism fails to work, a manual pull wire can replace the drive block to pull the first pull wire slider toward the unlocking position to unlock the seat. To relock the seat cushion, you only need to press the seat cushion. The principle is the same as above.

Claims

1. A manual and automatic combined wire pulling device, comprising a shell, an unlocking wire pulling wire, a first wire pulling slider being arranged in the shell, the first wire pulling slider being arranged on the shell along a lateral sliding motion, the first wire pulling slider having an unlocking position and a reset position, an electric drive mechanism and a manual wire pulling wire for driving the first wire pulling slider to move to the unlocking position being arranged in the shell, the electric drive mechanism comprising a driving block for driving the first wire pulling slider to move, a motor for driving the driving block to move, and a gear set for transmitting the power of the motor to the driving block, the driving block being arranged on the shell along a lateral sliding motion, the manual wire pulling wire being connected to the first wire pulling slider, the unlocking wire pulling wire and the manual wire pulling wire being arranged at both ends of the shell, characterized in that: The housing is provided with a second wire-pull slider connected to the unlocking wire, the second wire-pull slider is slidably arranged on the housing in a lateral direction, and an elastic member is provided between the second wire-pull slider and the first wire-pull slider to realize the linkage between the two.

2. The manual and automatic combined wire pulling device according to claim 1, characterized in that: A mounting frame is provided at one end of the first wire pull slider facing the second wire pull slider, and the second wire pull slider includes a plug-in frame plugged with the mounting frame and a connecting block connected to the unlocking wire. The mounting frame is provided with a plug-in slot plugged with the plug-in frame, and mounting columns are provided on the inner walls on both sides of the plug-in frame. The elastic member is a spring, and both ends of the spring are respectively mounted on the mounting columns, and the outer diameter of the spring is greater than the width of the plug-in slot.

3. The manual and automatic combined wire pulling device according to claim 1, characterized in that: A first U-shaped connecting frame is provided at one end of the first wire pulling slider facing the second wire pulling slider, and the second wire pulling slider includes a second U-shaped connecting frame and a connecting block connected to the unlocking wire. The first U-shaped connecting frame and the second U-shaped connecting frame are fitted together to obtain a chamber for installing an elastic member, and a first mounting protrusion is provided in the first U-shaped connecting frame, and a second mounting protrusion is provided in the second U-shaped connecting frame. The elastic member is a tension spring, and both ends of the tension spring are respectively mounted on the first mounting protrusion and the second mounting protrusion.

4. The manual and automatic combined wire pulling device according to any one of claims 1 to 3, characterized in that: A linkage block is provided on the driving block, a linkage frame is provided in the first wire-pulling slider, the linkage block can move laterally in the linkage frame, an induction switch is provided on the shell to cause the driving block to reset, one side of the driving block includes a first smooth section, a second smooth section and a rack section located between the first smooth section and the second smooth section, the gear group is respectively meshed with the motor and the rack section, and at least one group of anti-breaking tooth structures is provided in the shell to be located in the movement direction of the driving block and can cause the driving block to separate or mesh with the gear group.

5. The manual and automatic combined wire pulling device according to claim 4, characterized in that: Anti-breaking tooth structures are provided on both sides of the movement direction of the driving block. The anti-breaking tooth structures include a pushing block and a first spring slidably arranged in the shell. One end of the first spring is connected to the pushing block, and the other end is against the inner wall of the shell.

6. The manual and automatic combined wire pulling device according to claim 4, characterized in that: The anti-tooth breakage structure and the induction switch are respectively arranged on both sides of the movement direction of the driving block. The anti-tooth breakage structure includes a pushing block and a first spring slidably arranged in the shell. One end of the first spring is connected to the pushing block, and the other end is against the inner wall of the shell. The contact of the induction switch is set toward the driving block.

7. The manual and automatic combined wire pulling device according to claim 5, characterized in that: The outer peripheral wall of the first wire pulling slider is provided with a contact wing plate, and the shell is provided with a sensing switch for detecting that the first wire pulling slider moves to an unlocked position. The contact of the sensing switch is located below the contact wing plate. The contact wing plate can trigger the contact of the sensing switch, and the motor reverses to drive the driving block to reset.

8. The manual and automatic combined wire pulling device according to any one of claims 1 to 3, characterized in that: The shell includes a base, an outer shell covering one side of the base, and a bottom shell covering the other side of the base, a chamber for installing a first wire pull slider and a second wire pull slider is formed between the base and the outer shell, and a chamber for installing an electric drive mechanism is formed between the base and the bottom shell, the unlocking wire and the manual wire pull are respectively installed on the two sides of the outer shell, the base is provided with a slide groove for installing the first wire pull slider, the first wire pull slider is provided with a first wire pull head installation entrance for installing the wire head of the manual pull wire, and the second wire pull slider is provided with a second wire pull head installation entrance for installing the wire head of the unlocking wire.

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