A double-pull unlocking structure for a lock

Abstract

The present invention discloses a double-pull unlocking structure for a lock, comprising a housing, a lock block assembly, and a lock assembly. The lock block assembly has a groove on one side, with a locking block and a buckle block rotatably disposed on both sides of the groove. The lock block assembly also includes a rotatably disposed unlocking block, a toggle portion on the buckle block facing the unlocking block, and a toggle block slidably disposed on the unlocking block to cooperate with the toggle portion. The lock assembly includes an electric drive structure, a swing arm, a connecting rod, and a return torsion spring. The swing arm has a slide groove, a slider is disposed at one end of the connecting rod, and the other end is connected to the toggle block. The slider is slidably disposed in the slide groove, the swing arm is provided with a return torsion spring, an unlocking slider is slidably disposed in the housing, and a pushing portion is disposed on the unlocking block. The housing is provided with an inner door handle drive structure, and the unlocking slider can be pushed by the inner door handle drive structure to toggle the swing arm from a locked position to an unlocked position. This lock can open a vehicle door by pulling the inner door handle twice when locked, and has a simple structure and low cost.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle door latches, in particular to a double-pull unlocking structure of a latch. Background Art

[0002] A vehicle door closer is a structure used to control the opening of a vehicle door by pulling the handle. It consists of a lock block assembly and a closer. One side of the lock block assembly has a groove that mates with the door buckle. A locking block and a buckle block are rotatably mounted on either side of the groove. Both the locking block and the buckle block have return torsion springs installed on their rotating shafts. When the locking block is moved by the door buckle, it becomes stuck in the buckle block and cannot be reset, thus locking the door. The locking block can be unlocked by rotating the buckle block, and the locking block can be reset by the torsion spring, thereby opening the door.

[0003] When the dial block is aligned with the toggle portion, when the inner door handle or the outer door handle is pulled to drive the unlocking block to rotate, the dial block can toggle the buckle block to rotate, thereby opening the vehicle door. The locker is a device that is used to adjust the position of the shift block through electrical signal control. A motor is installed in the locker, and the motor can be controlled to rotate forward or reverse through electrical signals. A certain mechanical structure is used to make the shift block slide in the slide groove to align or stagger the buckle block, thereby realizing the switching between the locked and unlocked states.

[0004] For example, CN213807111U discloses a locking structure of a central door lock, but it can only control the locking and unlocking switching of the locker through a motor. In some car models, when the door is locked, it is required to pull the inner door handle twice to open the door, while the door cannot be opened by pulling the outer door handle. The present application aims to provide a locking device unlocking structure in which, when the door is locked, it is required to pull the inner door handle twice to open the door, while the door cannot be opened by pulling the outer door handle. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides a double-pull unlocking structure for a lock. When the double-pull unlocking structure is in the locked state, the car door can be opened by pulling the inner door handle twice inside the car, while the lock unlocking structure cannot be opened by pulling the outer door handle. The double-pull unlocking structure is suitable for use in vehicles that require the double-pull unlocking function of the inner door handle, and has a simple structure and low manufacturing cost.

[0006] In order to solve the above technical problems, the present invention is solved by the following technical solutions: a double-pull unlocking structure of a lock, including a shell, a lock block assembly and a lock block assembly, one side of the lock block assembly is provided with a groove that cooperates with the door buckle, and the two sides of the groove are respectively rotatably provided with a locking block and a buckle block, and the lock block assembly also includes a rotatable unlocking block, and the shell is provided with an elastic member for resetting the locking block, the buckle block and the unlocking block, and a toggle part is provided on the buckle block facing the unlocking block, and a toggle block that cooperates with the toggle part is slidably provided on the unlocking block, and the lock assembly includes an electric drive structure, a swing structure, a An arm, a connecting rod and a return torsion spring, a sliding groove is provided on the swing arm, a slider is provided at one end of the connecting rod, and the other end is connected to the shift block, the slider is slidably arranged in the sliding groove, the swing arm is provided with the return torsion spring for pushing the shift block to a position cooperating with the shifting portion, a pushing portion is provided on the unlocking block, and an inner door handle driving structure for pulling the inner door handle to push the pushing portion is provided on the shell, an unlocking slider which can be shifted and shifted by the swing arm is slidably arranged in the shell, and the unlocking slider can be pushed by the inner door handle driving structure to shift the swing arm from the locked position to the unlocked position. When the door is locked, the double-pull unlocking structure of the locker can drive the inner door handle driving structure to move by pulling the inner door handle. When the inner door handle driving structure is in action, it can drive the unlocking block to rotate and push the unlocking slider to move. The movement of the unlocking slider can drive the swing arm to rotate from the locked position to the unlocked position. During the rotation of the unlocking block, since the swing arm rotates from the locked position to the unlocked position, the shift block will abut against the inner side of the shift part, and the shift block will be pushed by the shift part and move together with the connecting rod relative to the swing arm in the direction of the swing arm, that is, the slider will move in the slide groove, so the unlocking block will not be unable to continue to rotate due to the shift block abutting against the inner side of the shift part. After pulling the inner door handle once and releasing it, the unlocking block will reset, and the swing arm will stay in the unlocked position. When the inner door handle is pulled again to drive the unlocking block to rotate, the dial block will drive the dial part to rotate, and then drive the buckle block to rotate. The buckle block no longer blocks the locking block, and the locking block is reset under the action of the elastic member, so that the vehicle door can be opened. When the outer door handle is pulled in the locked state, the dial block and the toggle part are staggered, so the dial block will not contact the toggle part and the door cannot be opened, and the pushing part will not contact the unlocking slider, so the state of the locker will not change, thereby realizing the door opening by pulling the inner door handle twice in the vehicle, and the locker unlocking structure that cannot be opened by pulling the outer door handle is suitable for vehicles that require the double-pull unlocking function of the inner door handle, and has a simple structure and low manufacturing cost.

[0007] In the above technical solution, preferably, the housing is provided with a first positioning post that passes through the swing arm, the swing arm is provided with a second positioning post, and a torsion spring is provided between the first and second positioning posts for positioning the swing arm between the locked and unlocked positions. This structure enables the spring force of the torsion spring to reliably position the swing arm in both the locked and unlocked positions, preventing the swing arm from switching accidentally due to vibration during driving.

[0008] In the above technical solution, preferably, the inner door handle driving structure includes a first rotating arm, a second rotating arm and an adjusting arm, the first rotating arm and the second rotating arm are rotatably arranged on the shell, a guide hole is provided on the shell, and an adjusting hole is provided on the second rotating arm, one end of the adjusting arm is provided with a first bending portion slidably arranged in the guide hole, and the other end of the adjusting arm is provided with a second bending portion slidably arranged in the adjusting hole, the first bending portion moves in the guide hole to drive the second bending portion to move in the adjusting hole to align or stagger the first rotating arm, when and only when the adjusting arm is aligned with the first rotating arm, the rotation of the first rotating arm can push the adjusting arm and the second rotating arm to rotate, and the second rotating arm pushes the unlocking block to rotate in the unlocking direction. This structure can achieve a child protection effect. The first rotating arm is connected to the inner door handle through a pull rod or a pull wire. When the adjusting arm is aligned with the first rotating arm, the inner door handle can be directly pulled to push the adjusting arm and the second rotating arm to rotate, and the second rotating arm pushes the unlocking block to rotate in the unlocking direction, thereby realizing the door opening operation. Directly opening the car door is dangerous when a child is sitting in the car. By adjusting the position of the first bending part in the guide hole, the adjusting arm and the first rotating arm can be staggered. At this time, when the inner door handle is pulled, only the first rotating arm rotates, and the second rotating arm does not rotate, so the car door will not be opened. Therefore, it can achieve the child protection effect, and the structure is simple and the manufacturing cost is low.

[0009] In the above technical solution, preferably, one side of the guide hole is provided with an elastic limiting rib, the middle portion of which protrudes into the guide hole. This structure enables the guide holes on both sides of the protruding position of the elastic limiting rib to limit the first bent portion, preventing the first bent portion from accidentally moving within the guide hole, and preventing the first bent portion from accidentally moving due to factors such as vehicle vibration.

[0010] In the above technical solution, preferably, a rotary knob is rotatably mounted on the housing, one side of the rotary knob abutting against the unlocking slider, a toggle slot is provided on the unlocking slider, an eccentric toggle lever is provided on the side of the rotary knob facing the unlocking slider, and the other side of the rotary knob is provided with a key socket. With this structure, if the motor of the lock assembly fails or loses power, and the lock assembly is in the unlocked state, a key can be inserted into the key socket through the side of the vehicle door and rotated. Rotating the key can drive the rotary knob to rotate, thereby driving the unlocking slider to move, and the unlocking slider can rotate the swing arm from the unlocked position to the locked position, thereby enabling emergency door closure.

[0011] In the above technical solution, preferably, the unlocking slider is disposed on the back side of the slot, and the rotary knob is rotatably disposed on the housing between the slot and the unlocking slider. Since one side of the slot has no complex structure and the key can be directly inserted, arranging the unlocking slider and rotary knob in this position facilitates key insertion.

[0012] In the above technical solution, preferably, the electric drive structure includes a worm driven by a motor and a worm wheel cooperating with the worm, a toggle protrusion is provided on the side of the worm wheel, and a toggle cooperating groove is provided on the swing arm. The toggle protrusion can extend into the toggle cooperating groove as the worm wheel rotates to toggle the swing arm to switch between the locked position and the unlocked position, and rotate out of the toggle cooperating groove after the switching is completed. In the prior art, the transmission structure between the worm gear and the swing arm is generally continuous transmission, which means that when the swing arm actively swings, it is necessary to overcome the damping of the worm gear mechanism and the motor, and the swing arm cannot be swung when the motor is stuck. The adoption of this structure makes the worm gear and the swing arm intermittently linked. It will only be linked with the swing arm when the worm gear drives the swing arm to rotate and the toggle protrusion extends into the toggle matching groove and fits with the side wall of the toggle matching groove, and can leave the toggle matching groove after completing the switching of the swing arm position. Therefore, when the swing arm actively swings, it does not need to overcome the damping of the worm gear mechanism and the motor, so that the damping of the swing arm is smaller when it actively swings, and it will not be unable to swing due to the motor being stuck.

[0013] In the above technical solution, preferably, a guide channel is provided on the housing, and a pull rod connecting portion passing through the guide channel is provided on the unlocking slider.

[0014] In the above technical solution, preferably, a bending lever is rotatably provided on the shell, a slot for inserting one end of the bending lever is provided on the unlocking slider, a second pull rope is provided on the shell, one end of the second pull rope is connected to the bending lever, and the other end of the second pull rope is connected to the car locking rod on the car door.

[0015] Compared with the prior art, the present invention has the following beneficial effects: in the locked state, the double-pull unlocking structure of the locker can drive the inner door handle driving structure to move by pulling the inner door handle. When the inner door handle driving structure is in action, it can drive the unlocking block to rotate and push the unlocking slider to move. The movement of the unlocking slider can drive the swing arm to rotate from the locked position to the unlocked position. During the rotation of the unlocking block, since the swing arm will rotate from the locked position to the unlocked position, the shift block will abut against the inner side of the shift part, and the shift block will be pushed by the shift part and move together with the connecting rod relative to the swing arm in the direction of the swing arm, that is, the slider will move in the slide groove, so the unlocking block will not be unable to continue to rotate due to the shift block abutting the inner side surface of the shift part. After pulling the inner door handle once and releasing it, the unlocking block will reset, and the swing arm will stay in the unlocked position The lock mechanism is configured such that the door can be opened by pulling the inner door handle twice, but cannot be opened by pulling the outer door handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of Example 1 of the present invention.

[0017] Figure 2 This is a structural schematic diagram of the upper shell of Example 1 of the present invention when it is opened.

[0018] Figure 3 This is a schematic diagram of the partial decomposition structure of Example 1 of the present invention.

[0019] Figure 4 This is a structural diagram of one side of the locking block assembly in Example 1 of the present invention.

[0020] Figure 5 This is a schematic diagram of the exploded structure of the installation position of the rotary knob in Example 1 of the present invention.

[0021] Figure 6 This is a schematic diagram of the internal structure of the unlocked state of Example 1 of the present invention.

[0022] Figure 7 This is a schematic diagram of the internal structure of the locked state of Example 1 of the present invention.

[0023] Figure 8 This is a schematic structural diagram of the swing arm in Example 1 of the present invention.

[0024] Figure 9 It is a partial enlarged view of the child protection structure in Example 1 of the present invention when it is not activated and activated.

[0025] Figure 10 This is a structural diagram of the inner door handle drive structure in Example 1 of the present invention.

[0026] Figure 11 Schematic diagram of the structure of the adjustment arm in Example 1 of the present invention.

[0027] Figure 12 This is a structural diagram of Example 2 of the present invention.

[0028] Figure 13 This is a schematic diagram of the internal structure of Example 2 of the present invention. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: Figures 1 to 11 , a double-pull unlocking structure of a lock, including a shell 1, which includes an upper shell and a lower shell assembled as one, a lock block assembly 2 and a lock assembly 3. One side of the lock block assembly 2 is provided with a groove 21 that cooperates with the car door buckle, and a locking block 22 and a buckle block 23 are respectively rotatably provided on both sides of the groove 21. The lock block assembly 2 also includes a rotatable unlocking block 24, and an elastic member for resetting the locking block 22, the buckle block 23 and the unlocking block 24 is provided on the shell 1. In this embodiment, the elastic members are all torsion springs, and the rotating shafts of the locking block 22 and the buckle block 23 are both provided with torsion springs. After the locking block 22 is toggled by the door buckle, it will be stuck by the buckle block 23 and cannot be reset, thereby locking the door. The locking block 22 can be unlocked by toggling the buckle block 23 and rotating it. The locking block 22 can be reset under the action of the torsion spring to open the door.

[0030] The unlocking block 24 has a position connected to the outer door handle. By pulling the outer door handle, the unlocking block 24 can be rotated toward the unlocking direction. A toggle portion 231 is provided on the buckle block 23 facing the unlocking block 24. A toggle block 25 cooperating with the toggle portion 231 is slidably provided on the unlocking block 24. The lock assembly 3 includes an electric drive structure, a swing arm 35, a connecting rod 36 and a return torsion spring 37. A slide groove 351 is provided on the swing arm 35. One end of the connecting rod 36 is provided with a slider 361, and the other end is connected to the toggle block 25. The slider 361 is slidably set in the slide groove 351, and a return torsion spring 37 is provided on the swing arm 35 for pushing the toggle block 25 to a position cooperating with the toggle portion 231. An unlocking slider 38 that can be toggled by the swing arm 35 and toggled the swing arm 35 is slidably provided in the housing 1. Specifically, a socket is provided at the bottom of the unlocking slider 38, and one end of the swing arm 35 is inserted into the socket When the unlocking slider 38 slides, it can move the swing arm 35 to rotate, or when the swing arm 35 rotates, it can also drive the unlocking slider 38 to move. The unlocking block 24 is provided with a pushing portion 241. The housing 1 is provided with an inner door handle driving structure 4 that is used to pull the inner door handle to push the pushing portion 241. The inner door handle driving structure 4 is a driving structure connected to the inner door handle. In this embodiment, it includes at least one rotatable second rotating arm 42. When the inner door handle is pulled, the second rotating arm 42 rotates toward the pushing portion 241 to push the unlocking block 24 in the unlocking direction. The second rotating arm 42 can also push the unlocking slider 38. The unlocking slider 38 is slidably provided in the housing 1 and can be moved by the swing arm 35 and the swing arm 35. The unlocking slider 38 can be pushed by the inner door handle driving structure 4 to move the swing arm 35 from the locked position to the unlocked position. During the rotation of the unlocking block 24, the pushing portion 241 is always lower than the unlocking slider 38, so the unlocking block 24 never contacts the unlocking slider 38.

[0031] When the door is locked, the double-pull unlocking structure of the lock can drive the inner door handle driving structure 4 to move by pulling the inner door handle. When the inner door handle driving structure 4 is in action, the unlocking block 24 can be driven to rotate and the unlocking slider 38 can be pushed to move. The movement of the unlocking slider 38 can drive the swing arm 35 to rotate from the locked position to the unlocked position. During the rotation of the unlocking block 24, since the swing arm 35 will rotate from the locked position to the unlocked position, the shift block 25 will abut against the inner side of the toggle portion 231, and the shift block 25 will be pushed by the toggle portion 231 and will move together with the connecting rod 36 relative to the swing arm 35 toward the direction of the swing arm 35, that is, the slider 361 will move in the slide groove 351, so the unlocking block 24 will not be unable to continue to rotate due to the shift block 25 abutting against the inner side surface of the toggle portion 231. After pulling the inner door handle once and releasing it, the unlocking block 24 will reset, and the swing arm 35 will stay in the unlocked position. When the inner door handle is pulled again to drive the unlocking block 24 to rotate, the dial block 25 will drive the dial portion 231 to rotate, and then drive the buckle block 23 to rotate. The buckle block 23 no longer blocks the locking block 22, and the locking block 22 is reset under the action of the elastic member, so that the vehicle door can be opened; and when the outer door handle is pulled in the locked state, since the dial block 25 is staggered with the toggle portion 231, the dial block 25 will not contact the toggle portion 231, and the door cannot be opened, and the pushing portion 241 will not contact the unlocking slider 3, so the state of the locker will not be changed, thereby realizing that the vehicle door can be opened by pulling the inner door handle twice in the vehicle, and the locker unlocking structure that cannot be opened by pulling the outer door handle is suitable for vehicles that require the double-pull unlocking function of the inner door handle, and has a simple structure and low manufacturing cost.

[0032] In this embodiment, the housing 1 is provided with a first positioning post 11 that passes through the swing arm 35. The swing arm 35 is also provided with a second positioning post 352. A torsion spring 39 is disposed between the first positioning post 11 and the second positioning post 352 to position the swing arm 35 between the locked and unlocked positions. The torsion spring 39 comprises a central spiral steel wire and elastic rods extending from both ends of the spiral wire and intersecting with each other. The spiral wire is sleeved around the first positioning post 11, and the elastic rods are resiliently attached to either side of the second positioning post 352. The elastic force of the torsion spring 39 ensures that the swing arm 35 is reliably positioned in both the locked and unlocked positions, preventing the swing arm 35 from switching accidentally due to vibration during driving.

[0033] In this embodiment, the inner door handle driving structure 4 includes a first rotating arm 41, a second rotating arm 42 and an adjusting arm 43. The first rotating arm 41 and the second rotating arm 42 are rotatably arranged on the shell 1. A guide hole 12 is provided on the shell 1, and an adjusting hole 421 is provided on the second rotating arm 42. One end of the adjusting arm 43 is provided with a first bending portion 431 slidably arranged in the guide hole 12, and the other end of the adjusting arm 43 is provided with a second bending portion 432 slidably arranged in the adjusting hole 421. The first bending portion 431 moves in the guide hole 12 to drive the second bending portion 432 to move in the adjusting hole 421 to align or stagger the first rotating arm 41. When and only when the adjusting arm 43 is aligned with the first rotating arm 41, the rotation of the first rotating arm 41 can push the adjusting arm 43 and the second rotating arm 42 to rotate, and the second rotating arm 42 pushes the unlocking block 24 to rotate in the unlocking direction. This structure can achieve a child protection effect. The first rotating arm 41 is connected to the inner door handle through a pull rod or a pull wire. When the adjusting arm 43 is aligned with the first rotating arm 41, the inner door handle can be directly pulled to push the adjusting arm 43 and the second rotating arm 42 to rotate, and the second rotating arm 42 pushes the unlocking block 24 to rotate in the unlocking direction, thereby realizing the door opening operation. Directly opening the car door is dangerous when a child is sitting in the car. By adjusting the position of the first bending portion 431 in the guide hole 12, the adjusting arm 43 can be staggered with the first rotating arm 41. At this time, when the inner door handle is pulled, only the first rotating arm 41 rotates, and the second rotating arm 42 does not rotate, so the car door will not be opened. Therefore, it can achieve the effect of child protection, and the structure is simple and the manufacturing cost is low.

[0034] In this embodiment, a first cable 44 is provided on the housing 1. One end of the first cable 44 is connected to the first pivot arm 41, and the other end of the first cable 44 is connected to the interior door handle. Specifically, the housing 1 is provided with a positioning opening for the first cable sleeve. The outer sleeve of the first cable 44 is provided with an annular groove, which engages with the positioning opening to position the outer sleeve of the first cable 44. The movable core within the first cable 44 is connected to the first pivot arm 41 at one end and to the interior door handle at the other end.

[0035] In this embodiment, a first limiting protrusion 433 is provided on the first bent portion 431. The distance between the first limiting protrusion 433 and the main body of the adjustment arm 43 matches the depth of the guide hole 12. A second limiting protrusion 434 is provided on the second bent portion 432. The distance between the second limiting protrusion 434 and the main body of the adjustment arm 43 matches the depth of the adjustment hole 421. This structure prevents the adjustment arm 43 from swinging, making the adjustment arm 43 more stable.

[0036] For ease of installation and control, the first rotating arm 41 and the second rotating arm 42 rotate around the same rotating axis.

[0037] In this embodiment, an elastic limiting rib 121 is provided on one side of the guide hole 12, the middle portion of which protrudes into the guide hole 12. The guide holes 12 on both sides of the protruding portion of the elastic limiting rib 121 can limit the first bent portion 431, preventing the first bent portion 431 from accidentally moving within the guide hole 12, and preventing the first bent portion 431 from accidentally moving due to factors such as vehicle vibration.

[0038] In this embodiment, a rotary knob 5 is rotatably mounted on the housing 1. One side of the rotary knob 5 abuts against an unlocking slider 38, which is provided with a toggle slot 381. An eccentric toggle lever 51 is provided on the side of the rotary knob 5 facing the unlocking slider 38, extending into the toggle slot 381. A key receptacle 52 is provided on the other side of the rotary knob 5. This structure allows for emergency door closure by inserting a key into the key receptacle 52 through the side of the vehicle door when the motor 31 of the lock assembly 3 fails or loses power, while the lock assembly 3 is in the unlocked state. Rotating the key rotates the rotary knob 5, thereby moving the unlocking slider 38. The unlocking slider 38 then rotates the swing arm 35 from the unlocked position to the locked position, thereby enabling emergency door closure.

[0039] In this embodiment, the unlocking slider 38 is disposed on the back side of the slot 21, and the rotary knob 5 is rotatably disposed on the housing 1 between the slot 21 and the unlocking slider 38. Since one side of the slot 21 has no complex structure and can be directly inserted with a key, arranging the unlocking slider 38 and the rotary knob 5 in this position facilitates key insertion.

[0040] In this embodiment, the worm 32 driven by the motor 31 and the worm wheel 33 matched with the worm 32, the side of the worm wheel 33 is provided with a toggle protrusion 331, and the swing arm 35 is provided with a toggle matching groove 353. The toggle protrusion 331 can be extended into the toggle matching groove 353 as the worm wheel 33 rotates to toggle the swing arm 35 to switch between the locked position and the unlocked position, and rotate out of the toggle matching groove 353 after the switching is completed. In the prior art, the transmission structure between the worm gear 33 and the swing arm 35 is generally continuous transmission, which means that when the swing arm 35 actively swings, it is necessary to overcome the damping of the worm gear mechanism and the motor 31, and the swing arm 35 cannot be swung when the motor 31 is stuck. The adoption of this structure makes the worm gear 33 and the swing arm 35 intermittently linked. Only when the worm gear 33 drives the swing arm 35 to rotate and the toggle protrusion 331 extends into the toggle matching groove 353 and fits with the side wall of the toggle matching groove 353 will it be linked with the swing arm 35, and can leave the toggle matching groove 353 after completing the switching of the swing arm 35 position. Therefore, when the swing arm 35 actively swings, it does not need to overcome the damping of the worm gear mechanism and the motor 31, so that the damping of the swing arm 35 when it actively swings is smaller, and it will not be unable to swing due to the jamming of the motor 31.

[0041] In this embodiment, the housing 1 is provided with a guide channel 13, which is oriented in the same direction as the sliding direction of the unlocking slider 38. The unlocking slider 38 is provided with a pull rod connecting portion 382 that extends through the guide channel 13. The pull rod connecting portion 382 is used to connect to a pull rod, which is connected to the locking lever in the vehicle door. The locking lever controls the movement of the unlocking slider 38, thereby controlling the switching of the swing arm 35.

[0042] See also Figure 12-13 Example 2 differs from Example 1 only in the connection structure between the locking lever and the unlocking slider 38. In this embodiment, a bending lever 310 is rotatably mounted on the housing 1, and a slot 383 is provided on the unlocking slider 38 for inserting one end of the bending lever 310. A second pull cord 311 is provided on the housing 1, one end of the second pull cord 311 being connected to the bending lever 310, and the other end of the second pull cord 311 being connected to the locking lever on the vehicle door. Specifically, the housing 1 is provided with a positioning opening for the second pull cord outer sleeve, and the outer sleeve of the second pull cord 311 is provided with an annular groove. The annular groove engages with the positioning opening to position the outer sleeve of the second pull cord 311. The movable core within the second pull cord 311 is connected to the bending lever 310 at one end and to the locking lever on the vehicle door at the other end. The locking lever controls the second pull cord 311, thereby controlling the switching of the swing arm 35.

[0043] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A double-pull unlocking structure for a lock, comprising a housing (1), a lock block assembly (2) and a lock assembly (3), wherein one side of the lock block assembly (2) is provided with a groove (21) for cooperating with a door buckle, and a locking block (22) and a buckle block (23) are rotatably provided on both sides of the groove (21), and the lock block assembly (2) further comprises a rotatably provided unlocking block (24), the housing (1) is provided with an elastic member for resetting the locking block (22), the buckle block (23) and the unlocking block (24), a toggle portion (231) is provided on the buckle block (23) on a side facing the unlocking block (24), and a toggle block (25) cooperating with the toggle portion (231) is slidably provided on the unlocking block (24), characterized in that: The locking device assembly (3) comprises an electric drive structure, a swing arm (35), a connecting rod (36) and a reset torsion spring (37), wherein a slide groove (351) is provided on the swing arm (35), a slider (361) is provided at one end of the connecting rod (36), and the other end is connected to the shift block (25), the slider (361) is slidably arranged in the slide groove (351), and the swing arm (35) is provided with the reset torsion spring (37) for pushing the shift block (25) to a position where it cooperates with the shifting portion (231). A spring (37) is provided on the unlocking block (24), a pushing portion (241) is provided on the housing (1), an inner door handle driving structure (4) for pulling the inner door handle to push the pushing portion (241) is provided, an unlocking slider (38) is slidably provided in the housing (1) and can be moved by the swing arm (35) and move the swing arm (35), and the unlocking slider (38) can be pushed by the inner door handle driving structure (4) to move the swing arm (35) from the locked position to the unlocked position.

2. The double-pull unlocking structure of a closure according to claim 1, characterized in that: The housing (1) is provided with a first positioning column (11) passing through the swing arm (35), the swing arm (35) is provided with a second positioning column (352), and a torsion spring (39) is provided between the first positioning column (11) and the second positioning column (352) for positioning the swing arm (35) in a locked position and an unlocked position.

3. The double-pull unlocking structure of a lock according to claim 1, characterized in that: The inner door handle driving structure (4) comprises a first rotating arm (41), a second rotating arm (42) and an adjusting arm (43); the first rotating arm (41) and the second rotating arm (42) are rotatably arranged on the shell (1); a guide hole (12) is arranged on the shell (1); an adjusting hole (421) is arranged on the second rotating arm (42); one end of the adjusting arm (43) is provided with a first bending portion (431) slidably arranged in the guide hole (12); the other end of the adjusting arm (43) is provided with a first bending portion (431) slidably arranged in the adjusting hole (4 The first bending portion (431) moves in the guide hole (12) to drive the second bending portion (432) to move in the adjustment hole (421) to align or stagger the first rotating arm (41). When and only when the adjustment arm (43) is aligned with the first rotating arm (41), the first rotating arm (41) rotates to drive the adjustment arm (43) and the second rotating arm (42) to rotate, and the second rotating arm (42) drives the unlocking block (24) to rotate in the unlocking direction.

4. The double-pull unlocking structure of a closure according to claim 3, characterized in that: An elastic limiting rib (121) is provided on one side of the guide hole (12), the middle portion of which protrudes into the guide hole (12).

5. The double-pull unlocking structure of a closure according to claim 1, characterized in that: A rotary knob (5) is rotatably provided on the housing (1), one side of the rotary knob (5) abuts against the unlocking slider (38), a toggle slot (381) is provided on the unlocking slider (38), an eccentric toggle rod (51) extending into the toggle slot (381) is provided on the side of the rotary knob (5) facing the unlocking slider (38), and a key socket (52) is provided on the other side of the rotary knob (5).

6. The double-pull unlocking structure of a closure according to claim 5, characterized in that: The unlocking slider (38) is arranged on the back side of the slot (21), and the rotating knob (5) is rotatably arranged on the housing (1) between the slot (21) and the unlocking slider (38).

7. The double-pull unlocking structure of a closure according to claim 1, characterized in that: The electric drive structure comprises a worm (32) driven by a motor (31) and a worm wheel (33) matched with the worm (32); a toggle protrusion (331) is provided on the side of the worm wheel (33); a toggle matching groove (353) is provided on the swing arm (35); the toggle protrusion (331) can rotate with the worm wheel (33) and extend into the toggle matching groove (353) to toggle the swing arm (35) to switch between a locked position and an unlocked position, and rotate out of the toggle matching groove (353) after the switching is completed.

8. The double-pull unlocking structure of a closure according to claim 1, characterized in that: A guide channel (13) is provided on the housing (1), and a pull rod connecting portion (382) passing through the guide channel (13) is provided on the unlocking slider (38).

9. The double-pull unlocking structure of a closure according to claim 1, characterized in that: A bending lever (310) is rotatably provided on the housing (1), a slot (383) is provided on the unlocking slider (38) for inserting one end of the bending lever (310), a second pull rope (311) is provided on the housing (1), one end of the second pull rope (311) is connected to the bending lever (310), and the other end of the second pull rope (311) is connected to a locking lever on a vehicle door.

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