阅读说明：本技术 一种汽车前盖锁的解锁装置 (Unlocking device of automobile front cover lock ) 是由 肖华 刘敏 黄阶金 于 2021-07-29 设计创作，主要内容包括：本发明涉及一种汽车前盖锁的解锁装置,包括底板、电动执行器、电动拉线组件、手动拉线组件和盖板,底板上转动设有棘爪、释放杆和锁钩,底板、棘爪、释放杆和盖板依次设置,棘爪和释放杆同轴转动,棘爪和底板之间设有棘爪弹簧,释放杆与盖板之间设有释放杆弹簧,锁钩上固设有顶板,顶板和底板之间设有锁钩弹簧,底板上具有用于限位棘爪旋转极限位置的限位部；电动执行器、电动拉线组件和棘爪依次连接,手动拉线组件与释放杆连接,当手动拉线组件驱动释放杆转至与棘爪的联动部接触时,棘爪随释放杆联动旋转；锁钩上沿其转动周向依次设有第一啮合点、第二啮合点和第三啮合点,棘爪上绕其转动周向依次设有与锁钩配合的第一啮合部和第二啮合部。(The invention relates to an unlocking device of an automobile front cover lock, which comprises a bottom plate, an electric actuator, an electric wire pulling assembly, a manual wire pulling assembly and a cover plate, wherein a pawl, a release lever and a lock hook are rotationally arranged on the bottom plate; the electric actuator, the electric wire pulling assembly and the pawl are sequentially connected, the manual wire pulling assembly is connected with the release lever, and when the manual wire pulling assembly drives the release lever to rotate to be in contact with the linkage part of the pawl, the pawl rotates along with the release lever in a linkage manner; the lock hook is sequentially provided with a first meshing point, a second meshing point and a third meshing point along the rotation circumferential direction of the lock hook, and the pawl is sequentially provided with a first meshing part and a second meshing part matched with the lock hook along the rotation circumferential direction of the pawl.)

1. The utility model provides an unlocking device of car protecgulum lock which characterized in that: comprises a bottom plate (1), an electric actuator (2), an electric stay wire component (3), a manual stay wire component (4) and a cover plate (5), the bottom plate (1) is rotatably provided with a pawl (6), a release lever (7) and a latch hook (8), the bottom plate (1), the pawl (6), the release lever (7) and the cover plate (5) are arranged in sequence, the pawl (6) and the release lever (7) rotate coaxially, a pawl spring (9) is arranged between the pawl (6) and the bottom plate (1), a release lever spring (10) is arranged between the release lever (7) and the cover plate (5), a top plate (8-4) is fixedly arranged on the latch hook (8), a latch hook spring (11) is arranged between the top plate (8-4) and the bottom plate (1), the bottom plate (1) is provided with a limiting part (1-1) for limiting the rotation limit position of the pawl (6);

the electric actuator (2), the electric pull wire assembly (3) and the pawl (6) are sequentially connected, the manual pull wire assembly (4) is connected with the release lever (7), the pawl (6) is provided with a linkage part (6-1), and when the manual pull wire assembly (4) drives the release lever (7) to rotate to be in contact with the linkage part (6-1), the pawl (6) rotates along with the release lever (7) in a linkage way;

a first microswitch (12) and a second microswitch (13) are arranged on the bottom plate (1), a first meshing point (8-1), a second meshing point (8-2) and a third meshing point (8-3) are sequentially arranged on the lock hook (8) along the rotation circumferential direction of the lock hook, and a first meshing part (6-2) and a second meshing part (6-3) are sequentially arranged on the pawl (6) around the rotation circumferential direction of the pawl; when the first meshing part (6-2) is meshed with the first meshing point (8-1), the front cover lock is in a full-locking state; when the second meshing part (6-3) is meshed with the third meshing point (8-3) and the pawl (6) is contacted with the limiting part (1-1), the pawl (6) is located at a rotation limit position for the first time, and the lock hook (8) triggers the first microswitch (12); when the first meshing part (6-2) is meshed with the second meshing point (8-2), the front cover lock is in a half-locking state; when the pawl (6) is located at the rotation limit position for the second time, the lock hook (8) triggers a second microswitch (13); when the pawl (6) and the latch hook (8) are out of contact, the front cover lock is completely opened and unlocked.

2. The unlocking device of the automobile front cover lock according to claim 1, characterized in that: the electric stay wire assembly (3) comprises a slider shell (3-1), a slider (3-2), an electric stay wire (3-3) and an electric stay wire shell (3-4), wherein the slider (3-2) is arranged in the slider shell (3-1) in a sliding manner, the electric stay wire (3-3) is arranged in the electric stay wire shell (3-4) in a sliding manner, the shell (2-2) of the electric actuator (2), the slider shell (3-1), the electric stay wire shell (3-4) and the bottom plate (1) are fixedly connected in sequence, and the telescopic rod (2-1), the slider (3-2), the electric stay wire (3-3) and the pawl (6) of the electric actuator (2) are fixedly connected in sequence.

3. The unlocking device of the automobile front cover lock according to claim 2, characterized in that: the shell (2-2) of the electric actuator (2), the slider shell (3-1), the electric wire shell (3-4) and the bottom plate (1) are sequentially connected and fixed through clamping, and the telescopic rod (2-1), the slider (3-2), the electric wire (3-3) and the pawl (6) of the electric actuator (2) are also sequentially connected and fixed through clamping.

4. The unlocking device of the automobile front cover lock according to claim 2 or 3, characterized in that: the sliding block shell (3-1) is of a split structure and is fixedly connected through clamping.

5. The unlocking device of the automobile front cover lock according to claim 1 or 2, characterized in that: the manual pull wire assembly (4) comprises a manual pull wire (4-1) and a manual pull wire shell (4-2), the manual pull wire (4-1) is arranged in the manual pull wire shell (4-2) in a sliding mode, and the manual pull wire (4-1) is fixedly connected with a release lever (7).

6. The unlocking device of the automobile front cover lock according to claim 5, characterized in that: the manual pull wire (4-1) is fixedly connected with the release lever (7) through clamping.

7. The unlocking device of the automobile front cover lock according to claim 1, characterized in that: the pawl (6) and the release lever (7) are rotationally arranged on the bottom plate (1) through a pawl shaft (14), and the latch hook (8) is rotationally arranged on the bottom plate (1) through a latch hook shaft (15).

8. The unlocking device of the automobile front cover lock according to claim 1, characterized in that: the pawl spring (9) is a torsion spring, and the release lever spring (10) and the latch hook spring (11) are tension springs.

Technical Field

The invention belongs to the technical field of automobile front cover locks, and particularly relates to an unlocking device of an automobile front cover lock.

Background

The front cover of the automobile is an automobile body component for closing an engine compartment of the automobile, and in order to prevent self-opening due to vibration, the front end of the front cover is provided with a front cover lock, and the front cover lock is a locking mechanism of the front cover, so that the front cover is kept closed when locked, and is convenient to open after unlocked. To meet legislative and practical requirements, front cover locks are typically classified into one-level unlocking (in-cabin unlocking) and two-level unlocking (outside unlocking).

The automobile front cover lock on the current market basically closes the front cover through a user, overcomes the spring force of the bouncing of the front cover lock through the kinetic energy generated by the weight of the front cover, enables a lock catch on the front cover to be buckled with a lock hook of the front cover lock, and when unlocking, the user needs to unlock a handle through the front cover lock in a cab to carry out two times of pulling operation to realize the bouncing of the front cover under the action of the bouncing spring force. The arrangement of the unlocking handle is often in a position which is difficult to operate, so that the unlocking handle is unfavorable for the operation of a user; in addition, due to the continuous popularization of electric vehicles, the engine compartment is designed as a luggage compartment, and the opening rate is high, so that users have higher requirements on the opening function and performance of the front cover. How to realize the electronic convenient unblock of protecgulum lock, can realize the manual emergent unblock of protecgulum lock again, ensure the protecgulum and open, be the technical problem who follows the automobile development and need solve urgently.

Disclosure of Invention

The invention provides an unlocking device for a front cover lock of an automobile, which aims to solve the problems that how to realize electric convenient unlocking of the front cover lock, and simultaneously realize manual emergency unlocking of the front cover lock to ensure opening of the front cover in the prior art.

In order to solve the technical problems, the technical scheme adopted by the invention is that the unlocking device of the automobile front cover lock comprises a bottom plate, an electric actuator, an electric stay wire assembly, a manual stay wire assembly and a cover plate, wherein a pawl, a release lever and a lock hook are rotationally arranged on the bottom plate, the pawl, the release lever and the cover plate are sequentially arranged, the pawl and the release lever coaxially rotate, a pawl spring is arranged between the pawl and the bottom plate, a release lever spring is arranged between the release lever and the cover plate, a top plate is fixedly arranged on the lock hook, a lock hook spring is arranged between the top plate and the bottom plate, and a limiting part for limiting the rotation limit position of the pawl is arranged on the bottom plate;

the electric actuator, the electric pull wire assembly and the pawl are sequentially connected, the manual pull wire assembly is connected with the release lever, the pawl is provided with a linkage part, and when the manual pull wire assembly drives the release lever to rotate to be in contact with the linkage part, the pawl rotates along with the release lever in a linkage way;

the bottom plate is provided with a first microswitch and a second microswitch, the lock hook is sequentially provided with a first meshing point, a second meshing point and a third meshing point along the rotation circumferential direction of the lock hook, and the pawl is sequentially provided with a first meshing part and a second meshing part around the rotation circumferential direction of the pawl; when the first engaging part is engaged with the first engaging point, the front cover lock is in a full-locking state; when the second meshing part is meshed with the third meshing point and the pawl is contacted with the limiting part, the pawl is located at a rotation limit position for the first time, and the lock hook triggers the first microswitch; when the first meshing part is meshed with the second meshing point, the front cover lock is in a half-locking state; when the pawl is located at the rotation limit position for the second time, the lock hook triggers a second microswitch; when the pawl and the latch hook are out of contact, the front cover lock is fully opened and unlocked.

Preferably, the electric wire drawing assembly comprises a slider shell, a slider, an electric wire drawing and an electric wire casing, the slider is arranged in the slider shell in a sliding mode, the electric wire drawing is arranged in the electric wire casing in a sliding mode, the shell of the electric actuator, the slider shell, the electric wire casing and the bottom plate are sequentially and fixedly connected, and the telescopic rod, the slider, the electric wire drawing and the pawl of the electric actuator are sequentially and fixedly connected. Because of the electronic acting as go-between is flexible material, electronic acting as go-between and pawl are flexonics, rely on electronic acting as go-between alternate segregation to set up between electronic executor and the protecgulum lock, rely on adjusting electronic acting as go-between trend and can make electronic executor install in the suitable position of automobile body, make car protecgulum lock can adapt to different motorcycle types, and the suitability is wider, has saved the cost.

Preferably, the shell, the slider shell, the electric wire shell and the bottom plate of the electric actuator are sequentially and fixedly connected through clamping, and the telescopic rod, the slider, the electric wire and the pawl of the electric actuator are also sequentially and fixedly connected through clamping. The electric stay wire assembly is simple and reliable in mounting structure, convenient to assemble, disassemble and maintain and low in cost.

Preferably, the sliding block shell is of a split structure and is fixedly connected through clamping. The slider shell is simple and reliable in structure, convenient to assemble, disassemble and maintain and low in cost.

Preferably, the manual pull wire assembly comprises a manual pull wire and a manual wire shell, the manual pull wire is slidably arranged in the manual wire shell, and the manual pull wire is fixedly connected with the release lever. Because of the manual stay wire is flexible material, manual stay wire and release lever are flexonics, rely on manual stay wire alternate segregation to set up between the operation end of manual stay wire and the protecgulum lock, rely on adjusting the manual trend of acting as go-between and can make the operation end of manual stay wire install in the suitable position of automobile body, make the automobile protecgulum lock can adapt to different motorcycle types, the suitability is wider, has saved the cost.

Preferably, the manual pull wire and the release lever are fixedly connected through clamping. The mounting structure of the manual wire pulling assembly is simple and reliable, convenient to assemble, disassemble and maintain and low in cost.

Further, the pawl and the release lever are rotationally arranged on the bottom plate through a pawl shaft, and the latch hook is rotationally arranged on the bottom plate through a latch hook shaft.

Further, the pawl spring is a torsion spring, and the release lever spring and the latch hook spring are tension springs.

Has the advantages that: the unlocking device for the automobile front cover lock can meet the requirements of electric convenient front cover lock opening, manual emergency front cover lock opening and high function and performance requirements of the automobile front cover opening rate; the unlocking device of the automobile front cover lock has the advantages of simple and reliable structure, ingenious design and lower cost; according to the unlocking device of the automobile front cover lock, the electric pull wire is made of flexible materials, the electric pull wire is flexibly connected with the pawl, the electric actuator and the front cover lock are arranged in a mutually separated mode through the electric pull wire, the electric actuator can be installed at a proper position of an automobile body by adjusting the trend of the electric pull wire, the manual pull wire is flexibly connected with the release lever because the manual pull wire is also made of flexible materials, the operating end of the manual pull wire and the front cover lock are arranged in a mutually separated mode through the manual pull wire, and the operating end of the manual pull wire can be installed at a proper position of the automobile body by adjusting the trend of the manual pull wire, so that the automobile front cover lock can adapt to different automobile types, is flexible to install and is wider in applicability.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic perspective view of an unlocking device for a front cover lock of an automobile according to the present invention;

FIG. 2 is a schematic perspective view of a front cover lock of the unlocking device for a front cover lock of an automobile according to the present invention;

FIG. 3 is a perspective view of the front cover lock of the unlocking apparatus for the front cover lock of the automobile of the present invention, in which the cover plate and the release lever spring are not shown;

FIG. 4 is a schematic perspective view of an electric actuator of the unlocking device for the front cover lock of the automobile according to the present invention;

FIG. 5 is a schematic perspective view of an electrical cable assembly of the unlocking device for the front cover lock of the vehicle of the present invention;

FIG. 6 is a schematic perspective view of a manual cable assembly of the unlocking device for the front cover lock of the automobile according to the present invention;

FIG. 7 is a schematic view of the pawl and latch hook cooperation principle of the unlocking device of the automobile front cover lock in the fully locked state;

FIG. 8 is a schematic diagram of the principle of the cooperation of the pawl and the latch hook during the primary electric (manual) unlocking of the unlocking device of the automobile front cover lock of the invention;

FIG. 9 is a schematic view of the semi-latched state of the pawl and latch hook engagement of the release mechanism of the front cover latch of the present invention;

FIG. 10 is a schematic view of the pawl and latch hook cooperation principle of the unlocking device for the automobile front cover lock during the secondary electric (manual) unlocking;

FIG. 11 is a schematic view of the pawl and latch hook cooperating in a fully unlocked state of the unlocking apparatus of the automobile front cover lock of the present invention;

the direction of the arrow in fig. 7, 8, 9 indicates the direction of rotation of the shackle;

in the figure: 1. the device comprises a bottom plate, 1-1 parts, a limiting part, 2 parts, an electric actuator, 2-1 parts, a telescopic rod, 2-2 parts, a shell, 3 parts, an electric wire pulling component, 3-1 parts, a slider shell, 3-2 parts, a slider, 3-3 parts, an electric wire pulling, 3-4 parts, an electric wire shell, 4 parts, a manual wire pulling component, 4-1 parts, a manual wire pulling, 4-2 parts, a manual wire shell, 5 parts, a cover plate, 6 parts, a pawl, 6-1 parts, a linkage part, 6-2 parts, a first meshing part, 6-3 parts, a second meshing part, 7 parts, a release lever, 8 parts, a lock hook, 8-1 parts, a first meshing point, 8-2 parts, a second meshing point, 8-3 parts, a third meshing point, 8-4 parts, a top plate, 9 parts, a pawl spring, 10 parts, a release lever spring, 11 parts, a lock hook spring, 12 parts, a first micro switch, 13 parts, a second parts, a third parts, a fourth part, a fourth, A second microswitch 14, a pawl shaft 15 and a locking hook shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 to 11, an unlocking device for a front cover lock of an automobile comprises a bottom plate 1, an electric actuator 2, an electric pull wire assembly 3, a manual pull wire assembly 4 and a cover plate 5, wherein a pawl 6, a release lever 7 and a latch hook 8 are rotatably arranged on the bottom plate 1, the pawl 6 and the release lever 7 of the present embodiment are both rotatably arranged on the bottom plate 1 through a pawl shaft 14, the latch hook 8 of the present embodiment is rotatably arranged on the bottom plate 1 through a latch hook shaft 15, the bottom plate 1, the pawl 6, the release lever 7 and the cover plate 5 are sequentially arranged, the pawl 6 and the release lever 7 rotate coaxially, a pawl spring 9 is arranged between the pawl 6 and the bottom plate 1, the pawl spring 9 of the present embodiment is a torsion spring, a release lever spring 10 is arranged between the release lever 7 and the cover plate 5, a top plate 8-4 is fixedly arranged on the latch hook 8, a latch hook spring 11 is arranged between the top plate 8-4 and the bottom plate 1, the release lever spring 10 and the latch hook spring 11 of the present embodiment are both tension springs, and the bottom plate 1 is provided with a limiting part 1-1 for limiting the rotation limit position of the pawl 6; the electric actuator 2, the electric wire pulling assembly 3 and the pawl 6 are sequentially connected, the manual wire pulling assembly 4 is connected with the release lever 7, the pawl 6 is provided with a linkage part 6-1, and when the manual wire pulling assembly 4 drives the release lever 7 to rotate to be in contact with the linkage part 6-1, the pawl 6 rotates along with the release lever 7 in a linkage way; a first microswitch 12 and a second microswitch 13 are arranged on the bottom plate 1, a first meshing point 8-1, a second meshing point 8-2 and a third meshing point 8-3 are sequentially arranged on the latch hook 8 along the rotation circumferential direction of the latch hook, and a first meshing part 6-2 and a second meshing part 6-3 are sequentially arranged on the pawl 6 around the rotation circumferential direction of the pawl; when the first meshing part 6-2 is meshed with the first meshing point 8-1, the front cover lock is in a full-locking state; when the second meshing part 6-3 is meshed with the third meshing point 8-3 and the pawl 6 is contacted with the limiting part 1-1, the pawl 6 is located at the rotation limit position for the first time, and the latch hook 8 triggers the first microswitch 12; when the first meshing part 6-2 is meshed with the second meshing point 8-2, the front cover lock is in a half-locking state; when the pawl 6 is in the extreme rotational position for the second time, the latch hook 8 triggers the second microswitch 13; when the pawl 6 and the catch 8 are out of contact, the front cover lock is fully opened and unlocked.

In order to facilitate the assembly of the electric actuator 2, the electric wire pulling assembly 3 and the pawl 6, in this embodiment, as shown in fig. 4 and 5, the electric wire pulling assembly 3 includes a slider housing 3-1, a slider 3-2, an electric wire pulling 3-3 and an electric wire housing 3-4, the slider 3-2 is slidably disposed in the slider housing 3-1, the electric wire pulling 3-3 is slidably disposed in the electric wire housing 3-4, the housing 2-2 of the electric actuator 2, the slider housing 3-1, the electric wire housing 3-4 and the bottom plate 1 are sequentially and fixedly connected, and the telescopic rod 2-1, the slider 3-2, the electric wire pulling 3-3 and the pawl 6 of the electric actuator 2 are sequentially and fixedly connected; specifically, as shown in fig. 1, 4 and 5, a housing 2-2, a slider housing 3-1, an electric wire housing 3-4 and a bottom plate 1 of the electric actuator 2 are sequentially and fixedly connected by clamping, and a telescopic rod 2-1, a slider 3-2, an electric wire 3-3 and a pawl 6 of the electric actuator 2 are also sequentially and fixedly connected by clamping; the sliding block shell 3-1 is of a split structure and is fixedly connected through clamping.

In order to facilitate the assembly of the manual wire pulling assembly 4 and the release lever 7, in the present embodiment, as shown in fig. 1 and 6, the manual wire pulling assembly 4 comprises a manual wire pulling 4-1 and a manual wire pulling case 4-2, the manual wire pulling 4-1 is slidably disposed in the manual wire pulling case 4-2, and the manual wire pulling 4-1 is fixedly connected with the release lever 7; the manual pull wire 4-1 is fixedly connected with the release lever 7 through clamping.

The working process of the unlocking device of the automobile front cover lock is as follows:

1. electric unlocking process

As shown in fig. 7, first, the first engagement point 8-1 of the latch hook 8 is engaged with the first engagement portion 6-2 of the pawl 6, and at this time, the front cover lock is in a fully locked state, and the front cover of the automobile is in a closed state;

as shown in fig. 8, the electric actuator 2 is started, the telescopic rod 2-1 of the electric actuator 2 retracts and drives the electric pull wire 3-3 to retract, the electric pull wire 3-3 drives the pawl 6 to rotate clockwise until the pawl 6 contacts with the limiting part 1-1 of the bottom plate 1, at this time, the pawl 6 is located at a rotation limit position for the first time, meanwhile, the first meshing part 6-2 of the pawl 6 is separated from the first meshing point 8-1 of the latch hook 8, the latch hook 8 rotates anticlockwise under the resilience of the latch hook spring 11 until the second meshing part 6-3 of the pawl 6 is meshed with the third meshing point 8-3 of the latch hook 8, meanwhile, the latch hook 8 triggers the first microswitch 12, and after the electric actuator 2 is delayed for a certain time to ensure reliable unlocking, the electric actuator 2 stops moving, and completes one-stage electric unlocking;

as shown in fig. 9, the electric actuator 2 continues to move, the telescopic rod 2-1 of the electric actuator 2 extends to reset and drives the electric pull wire 3-3 to extend to reset, the pawl 6 rotates counterclockwise to reset under the action of the resilience force of the pawl spring 9, meanwhile, the second meshing part 6-3 of the pawl 6 is separated from the third meshing point 8-3 of the latch hook 8, the latch hook 8 continues to rotate counterclockwise under the action of the resilience force of the latch hook spring 11 until the second meshing point 8-2 of the latch hook 8 is meshed with the first meshing part 6-2 of the pawl 6, and at this time, the front cover lock is in a half-locked state;

as shown in fig. 10, the electric actuator 2 continues to move, the telescopic rod 2-1 of the electric actuator 2 retracts for the second time, and drives the electric pull wire 3-3 to retract again, the electric pull wire 3-3 drives the pawl 6 to rotate clockwise again until the pawl 6 contacts with the limiting part 1-1 of the bottom plate 1, at this time, the pawl 6 is located at the rotation limit position for the second time, meanwhile, the second meshing point 8-2 of the latch hook 8 is separated from the first meshing part 6-2 of the pawl 6, the latch hook 8 continues to rotate counterclockwise under the effect of the resilience force of the latch hook spring 11 until the latch hook 8 contacts with the cover plate 5, and the latch hook 8 triggers the second microswitch 13, after the electric actuator 2 delays for a certain time to ensure reliable unlocking, the electric actuator 2 stops moving, and secondary electric unlocking is completed;

as shown in fig. 11, the electric actuator 2 continues to move, the telescopic rod 2-1 of the electric actuator 2 extends again to reset and drives the electric pull wire 3-3 to extend again to reset, the pawl 6 rotates counterclockwise to reset under the effect of the resilience force of the pawl spring 9, and at this time, the front cover lock is in a full unlocking state, so that the whole electric unlocking process is completed.

2. Manual emergency unlocking procedure

As shown in fig. 8, when an emergency such as an electric unlocking failure occurs, manual emergency unlocking is started, the manual pull wire 4-1 is pulled manually to retract, the manual pull wire 4-1 drives the release lever 7 to rotate clockwise, when the release lever 7 rotates to be in contact with the linkage part 6-1 of the pawl 6, the pawl 6 rotates along with the release lever 7 in a linkage manner until the pawl 6 is in contact with the limiting part 1-1 of the bottom plate 1, at the moment, the pawl 6 is located at the rotation limit position for the first time, the first engagement part 6-2 of the pawl 6 is disengaged from the first engagement point 8-1 of the latch hook 8, the latch hook 8 rotates anticlockwise under the resilience force of the latch hook spring 11 until the second engagement part 6-3 of the pawl 6 is engaged with the third engagement point 8-3 of the latch hook 8, and one-stage of manual unlocking is completed;

as shown in fig. 9, the manual pull wire 4-1 is released again, the manual pull wire 4-1 is extended and reset, the release lever 7 is rotated and reset counterclockwise under the resilient force of the release lever spring 10, meanwhile, the pawl 6 is rotated and reset counterclockwise under the resilient force of the pawl spring 9, the second engagement part 6-3 of the pawl 6 is disengaged from the third engagement point 8-3 of the latch hook 8, the latch hook 8 continues to rotate counterclockwise under the resilient force of the latch hook spring 11 until the second engagement point 8-2 of the latch hook 8 is engaged with the first engagement part 6-2 of the pawl 6, and the front cover lock is in a half-locked state;

as shown in fig. 10, the manual pull wire 4-1 is pulled manually for the second time to retract, the manual pull wire 4-1 drives the release lever 7 to rotate clockwise again, when the release lever 7 rotates to contact with the linkage part 6-1 of the pawl 6, the pawl 6 rotates along with the release lever 7 until the pawl 6 contacts with the limiting part 1-1 of the bottom plate 1, at this time, the pawl 6 is located at the rotation limit position for the second time, the second engagement point 8-2 of the lock hook 8 is disengaged from the first engagement part 6-2 of the pawl 6, the lock hook 8 continues to rotate counterclockwise under the resilience of the lock hook spring 11 until the lock hook 8 contacts with the cover plate 5, and secondary manual unlocking is completed;

as shown in fig. 11, the manual pull wire 4-1 is released again, the manual pull wire 4-1 is extended again to be reset, the release lever 7 is rotated counterclockwise to be reset under the resilience of the release lever spring 10, and simultaneously, the pawl 6 is rotated counterclockwise to be reset under the resilience of the pawl spring 9, at this time, the front cover lock is in a full unlocking state, and the whole process of manual unlocking is completed.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.