Unlocking device for automobile hood lock

Abstract

The present invention relates to an unlocking device for a front hood lock of an automobile, comprising a base plate, an electric actuator, an electric wire pull assembly, a manual wire pull assembly and a cover plate, wherein a pawl, a release rod and a lock hook are rotatably arranged on the base plate, the base plate, the pawl, the release rod and the cover plate are arranged in sequence, the pawl and the release rod rotate coaxially, a pawl spring is arranged between the pawl and the base plate, a release rod spring is arranged between the release rod 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 base plate, and a limiting portion for limiting the rotation limit position of the pawl is provided on the base plate; the electric actuator, the electric wire pull assembly and the pawl are connected in sequence, the manual wire pull assembly is connected to the release rod, and when the manual wire pull assembly drives the release rod to rotate to contact with the linkage portion of the pawl, the pawl rotates in linkage with the release rod; a first meshing point, a second meshing point and a third meshing point are arranged in sequence on the lock hook along its rotation circumference, and a first meshing portion and a second meshing portion cooperating with the lock hook are arranged in sequence on the pawl around its rotation circumference.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile bonnet locks, and in particular relates to an unlocking device for an automobile bonnet lock. Background Art

[0002] The bonnet is a body component used to close the engine compartment. To prevent it from opening automatically due to vibration, there must be a bonnet lock at the front end of the bonnet. The bonnet lock is the locking mechanism of the bonnet, which keeps the bonnet tightly closed when locked and is easy to open after unlocking. To meet regulatory and practical needs, bonnet locks are usually divided into primary unlocking (inside the cabin unlocking) and secondary unlocking (outside unlocking).

[0003] At present, the front hood locks of cars on the market basically have the user close the front hood, and the kinetic energy generated by the weight of the front hood overcomes the spring force of the front hood lock, so that the lock buckle on the front hood is engaged with the lock hook of the front hood lock. When unlocking, the user must use the front hood lock unlocking handle in the cab and pull it twice to make the front hood bounce up under the action of the spring force. Since the unlocking handle is often arranged in a position that is not easy to operate, it is not conducive to user operation; in addition, due to the continuous popularization of electric vehicles, the engine compartment is designed as a luggage compartment with a high opening rate, so users have higher requirements for the opening function and performance of the front hood. How to achieve the electric and convenient unlocking of the front hood lock, and the manual emergency unlocking of the front hood lock to ensure the opening of the front hood is a technical problem that needs to be solved in line with the development of automobiles. Summary of the invention

[0004] In order to solve the problem in the prior art of how to realize electric convenient unlocking of the bonnet lock and manual emergency unlocking of the bonnet lock to ensure the opening of the bonnet, the present invention provides an unlocking device for the bonnet lock of an automobile.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: an unlocking device for a front hood lock of an automobile, comprising a bottom plate, an electric actuator, an electric wire pull assembly, a manual wire pull assembly and a cover plate, a pawl, a release rod and a lock hook are rotatably arranged on the bottom plate, the bottom plate, the pawl, the release rod and the cover plate are arranged in sequence, the pawl and the release rod rotate coaxially, a pawl spring is arranged between the pawl and the bottom plate, a release rod spring is arranged between the release rod 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 portion for limiting the rotation limit position of the pawl is provided on the bottom plate;

[0006] The electric actuator, the electric wire assembly and the pawl are connected in sequence, the manual wire assembly is connected to the release rod, and the pawl has a linkage part. When the manual wire assembly drives the release rod to rotate until it contacts the linkage part, the pawl rotates in linkage with the release rod;

[0007] A first microswitch and a second microswitch are arranged on the bottom plate, a first meshing point, a second meshing point and a third meshing point are arranged in sequence on the lock hook along its rotational circumference, and a first meshing portion and a second meshing portion are arranged in sequence on the pawl around its rotational circumference; when the first meshing portion and the first meshing point are meshed, the front cover lock is in a fully locked state; when the second meshing portion and the third meshing point are meshed, and the pawl contacts the limiting portion, the pawl is located at the rotational limit position for the first time, and the lock hook triggers the first microswitch; when the first meshing portion and the second meshing point are meshed, the front cover lock is in a semi-locked state; when the pawl is located at the rotational limit position for the second time, the lock hook triggers the second microswitch; when the pawl and the lock hook are out of contact, the front cover lock is fully opened and unlocked.

[0008] Preferably, the electric pull wire assembly includes a slider housing, a slider, an electric pull wire and an electric wire housing, the slider is slidably arranged in the slider housing, the electric pull wire is slidably arranged in the electric wire housing, the housing, slider housing, electric wire housing and bottom plate of the electric actuator are fixedly connected in sequence, and the telescopic rod, slider, electric pull wire and ratchet of the electric actuator are fixedly connected in sequence. Because the electric pull wire is a flexible material, the electric pull wire and the ratchet are flexibly connected, the electric actuator and the hood lock are separated from each other by the electric pull wire, and the electric actuator can be installed in a suitable position on the vehicle body by adjusting the direction of the electric pull wire, so that the hood lock of the car can adapt to different models, with wider applicability and cost savings.

[0009] Preferably, the housing, slider housing, electric wire housing and bottom plate of the electric actuator are fixedly connected in sequence by snap-fitting, and the telescopic rod, slider, electric pull wire and ratchet of the electric actuator are also fixedly connected in sequence by snap-fitting. The installation structure of the electric pull wire assembly is simple and reliable, easy to assemble, easy to disassemble and repair, and low in cost.

[0010] Preferably, the slider housing is a split structure and is fixedly connected by snap-fitting. The structure of the slider housing is simple and reliable, easy to assemble, easy to disassemble and repair, and low in cost.

[0011] Preferably, the manual pull wire assembly includes a manual pull wire and a manual wire housing, the manual pull wire is slidably arranged in the manual wire housing, and the manual pull wire is fixedly connected to the release rod. Because the manual pull wire is made of flexible material, the manual pull wire and the release rod are flexibly connected, the operating end of the manual pull wire and the front cover lock are separated from each other by the manual pull wire, and the operating end of the manual pull wire can be installed at a suitable position on the vehicle body by adjusting the direction of the manual pull wire, so that the front cover lock of the car can adapt to different models, with wider applicability and cost savings.

[0012] Preferably, the manual pull wire is fixedly connected to the release rod by clamping. The installation structure of the manual pull wire assembly is simple and reliable, easy to assemble, easy to disassemble and maintain, and has low cost.

[0013] Furthermore, the pawl and the release rod are both rotatably disposed on the bottom plate via a pawl shaft, and the lock hook is rotatably disposed on the bottom plate via a lock hook shaft.

[0014] Furthermore, the pawl spring is a torsion spring, and the release rod spring and the lock hook spring are tension springs.

[0015] Beneficial effects: The unlocking device of the automobile bonnet lock of the present invention can meet the needs of electrically conveniently opening the bonnet lock and manually urgently opening the bonnet lock, and meets the functional and performance requirements of a high opening rate of the automobile bonnet; the unlocking device of the automobile bonnet lock of the present invention has a simple and reliable structure, ingenious design, and low cost; the unlocking device of the automobile bonnet lock of the present invention, because the electric pull wire is a flexible material, the electric pull wire and the ratchet are flexibly connected, the electric actuator and the bonnet lock are separated from each other by the electric pull wire, and the electric actuator can be installed at a suitable position on the vehicle body by adjusting the direction of the electric pull wire, and because the manual pull wire is also a flexible material, the manual pull wire and the release rod are also flexibly connected, the operating end of the manual pull wire and the bonnet lock are separated from each other by the manual pull wire, and the operating end of the manual pull wire can be installed at a suitable position on the vehicle body by adjusting the direction of the manual pull wire, so that the automobile bonnet lock can adapt to different vehicle models, is flexible to install, and has a wider applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the unlocking device of the automobile hood lock of the present invention;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the front cover lock of the unlocking device of the front cover lock of the automobile of the present invention;

[0019] Figure 3 1 is a schematic diagram of the three-dimensional structure of the front cover lock of the unlocking device of the front cover lock of the automobile of the present invention, wherein the cover plate and the release rod spring are not shown;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the electric actuator of the unlocking device of the automobile hood lock of the present invention;

[0021] Figure 5It is a three-dimensional structural schematic diagram of the electric pull wire assembly of the unlocking device of the automobile hood lock of the present invention;

[0022] Figure 6 It is a three-dimensional structural schematic diagram of a manual pull-wire assembly of an unlocking device of a front hood lock of an automobile according to the present invention;

[0023] Figure 7 It is a schematic diagram of the cooperation principle of the pawl and the lock hook of the unlocking device of the automobile hood lock of the present invention in the fully locked state;

[0024] Figure 8 It is a schematic diagram of the cooperation principle of the pawl and the lock hook during the primary electric (manual) unlocking of the unlocking device of the automobile hood lock of the present invention;

[0025] Fig. 9 It is a schematic diagram of the cooperation principle of the pawl and the lock hook of the unlocking device of the automobile hood lock of the present invention in a semi-locked state;

[0026] Fig.10 It is a schematic diagram of the cooperation principle of the pawl and the lock hook during the secondary electric (manual) unlocking of the unlocking device of the automobile hood lock of the present invention;

[0027] Fig.11 It is a schematic diagram of the cooperation principle of the pawl and the lock hook of the unlocking device of the automobile hood lock of the present invention in the fully unlocked state;

[0028] Figure 7 , Figure 8 , Fig. 9 The middle arrow indicates the rotation direction of the lock hook;

[0029] In the figure: 1, bottom plate, 1-1, limit part, 2, electric actuator, 2-1, telescopic rod, 2-2, shell, 3, electric pull wire assembly, 3-1, slider shell, 3-2, slider, 3-3, electric pull wire, 3-4, electric wire shell, 4, manual pull wire assembly, 4-1, manual pull wire, 4-2, manual wire shell, 5, cover plate, 6, pawl, 6-1, linkage part, 6-2, first meshing part, 6-3, second meshing part, 7, release rod, 8, lock hook, 8-1, first meshing point, 8-2, second meshing point, 8-3, third meshing point, 8-4, top plate, 9, pawl spring, 10, release rod spring, 11, lock hook spring, 12, first micro switch, 13, second micro switch, 14, pawl shaft, 15, lock hook shaft. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figures 1 to 11 As shown, an unlocking device for a front hood lock of an automobile comprises a base plate 1, an electric actuator 2, an electric pull wire assembly 3, a manual pull wire assembly 4 and a cover plate 5. A pawl 6, a release rod 7 and a lock hook 8 are rotatably arranged on the base plate 1. The pawl 6 and the release rod 7 of this embodiment are both rotatably arranged on the base plate 1 through a pawl shaft 14. The lock hook 8 of this embodiment is rotatably arranged on the base plate 1 through a lock hook shaft 15. The base plate 1, the pawl 6, the release rod 7 and the cover plate 5 are arranged in sequence. The pawl 6 and the release rod 7 rotate coaxially. A locking mechanism is arranged between the pawl 6 and the base plate 1. There is a pawl spring 9, which is a torsion spring in this embodiment. A release rod spring 10 is arranged between the release rod 7 and the cover plate 5. A top plate 8-4 is fixedly arranged on the lock hook 8, and a lock hook spring 11 is arranged between the top plate 8-4 and the bottom plate 1. The release rod spring 10 and the lock hook spring 11 in this embodiment are both tension springs, and the bottom plate 1 has a limiting portion 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 connected in sequence, and the manual pull wire assembly 4 is connected to the release rod 7. The pawl 6 has a linkage portion 6-1, and when the manual pull wire assembly 4 drives the release rod 7 to rotate until it contacts the linkage portion 6-1, the pawl 6 rotates in conjunction with the release rod 7; the base plate 1 is provided with a first micro switch 12 and a second micro switch 13, and the lock hook 8 is provided with a first meshing point 8-1, a second meshing point 8-2 and a third meshing point 8-3 in sequence along its rotation circumference, and the pawl 6 is provided with a first meshing portion 6-2 and a second meshing portion 6-3 in sequence around its rotation circumference; when the first meshing portion 6-2 and the first meshing point 8- 1 is engaged, the front cover lock is in a fully locked state; when the second engaging portion 6-3 is engaged with the third engaging point 8-3, and the pawl 6 is in contact with the limiting portion 1-1, the pawl 6 is located at the rotation limit position for the first time, and the lock hook 8 triggers the first micro switch 12; when the first engaging portion 6-2 is engaged with the second engaging point 8-2, the front cover lock is in a semi-locked state; when the pawl 6 is located at the rotation limit position for the second time, the lock hook 8 triggers the second micro switch 13; when the pawl 6 and the lock hook 8 are out of contact, the front cover lock is fully opened and unlocked.

[0033] In order to facilitate the assembly of the electric actuator 2, the electric wire assembly 3 and the ratchet 6, in this embodiment, Figure 4 and Figure 5 As shown, the electric wire pull assembly 3 includes a slider housing 3-1, a slider 3-2, an electric wire pull 3-3 and an electric wire housing 3-4, the slider 3-2 is slidably arranged in the slider housing 3-1, the electric wire pull 3-3 is slidably arranged in the electric wire housing 3-4, the housing 2-2, the slider housing 3-1, the electric wire housing 3-4 and the bottom plate 1 of the electric actuator 2 are fixedly connected in sequence, and the telescopic rod 2-1, the slider 3-2, the electric wire pull 3-3 and the ratchet 6 of the electric actuator 2 are fixedly connected in sequence; specifically, as Figure 1 , Figure 4 and Figure 5 As shown, the housing 2-2, slider housing 3-1, electric wire housing 3-4 and base plate 1 of the electric actuator 2 are successively connected by snap-fitting, and the telescopic rod 2-1, slider 3-2, electric pull wire 3-3 and ratchet 6 of the electric actuator 2 are also successively connected by snap-fitting; the slider housing 3-1 is a split structure and is successively connected by snap-fitting.

[0034] In order to facilitate the assembly of the manual pull wire assembly 4 and the release rod 7, in this embodiment, as shown in FIG. Figure 1 and Figure 6 As shown, the manual pull wire assembly 4 includes a manual pull wire 4-1 and a manual wire housing 4-2, the manual pull wire 4-1 is slidably arranged in the manual wire housing 4-2, and the manual pull wire 4-1 is fixedly connected to the release rod 7; the manual pull wire 4-1 is fixedly connected to the release rod 7 by snapping.

[0035] The working process of the unlocking device of the automobile front cover lock is as follows:

[0036] 1. Electric unlocking process

[0037] like Figure 7 As shown, first, the first engagement point 8-1 of the lock hook 8 is engaged with the first engagement portion 6-2 of the pawl 6, at which time the bonnet lock is in a fully locked state, and the bonnet of the vehicle is in a closed state;

[0038] like Figure 8As shown, 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, and the electric pull wire 3-3 drives the pawl 6 to rotate clockwise until the pawl 6 contacts the limiting portion 1-1 of the bottom plate 1. At this time, the pawl 6 is at the rotation limit position for the first time, and at the same time, the first meshing portion 6-2 of the pawl 6 disengages from the first meshing point 8-1 of the lock hook 8, and the lock hook 8 rotates counterclockwise under the rebound force of the lock hook spring 11 until the second meshing portion 6-3 of the pawl 6 meshes with the third meshing point 8-3 of the lock hook 8, and at the same time, the lock hook 8 triggers the first micro switch 12, and the electric actuator 2 delays for a certain time to ensure reliable unlocking, and then the electric actuator 2 stops moving, completing the first-level electric unlocking;

[0039] like Fig. 9 As shown, the electric actuator 2 continues to move, the telescopic rod 2-1 of the electric actuator 2 extends and resets, and drives the electric pull wire 3-3 to extend and reset, the pawl 6 rotates counterclockwise and resets under the rebound force of the pawl spring 9, and at the same time, the second meshing portion 6-3 of the pawl 6 disengages from the third meshing point 8-3 of the lock hook 8, and the lock hook 8 continues to rotate counterclockwise under the rebound force of the lock hook spring 11 until the second meshing point 8-2 of the lock hook 8 meshes with the first meshing portion 6-2 of the pawl 6, at which time the front cover lock is in a semi-locked state;

[0040] like Fig.10 As shown, 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, and the electric pull wire 3-3 drives the pawl 6 to rotate clockwise again until the pawl 6 contacts the limiting portion 1-1 of the bottom plate 1. At this time, the pawl 6 is at the rotation limit position for the second time, and at the same time, the second meshing point 8-2 of the lock hook 8 disengages from the first meshing portion 6-2 of the pawl 6. The lock hook 8 continues to rotate counterclockwise under the rebound force of the lock hook spring 11 until the lock hook 8 contacts the cover plate 5 and the lock hook 8 triggers the second micro switch 13. After the electric actuator 2 delays for a certain period of time to ensure reliable unlocking, the electric actuator 2 stops moving, completing the secondary electric unlocking.

[0041] like Fig.11 As shown, the electric actuator 2 continues to move, the telescopic rod 2-1 of the electric actuator 2 is extended and reset again, and drives the electric pull wire 3-3 to be extended and reset again, and the pawl 6 rotates counterclockwise and resets under the rebound force of the pawl spring 9. At this time, the front cover lock is in a fully unlocked state, completing the entire electric unlocking process.

[0042] 2. Manual emergency unlocking process

[0043] like Figure 8As shown, when an emergency such as electric unlocking failure occurs, the manual emergency unlocking is started, the manual pull wire 4-1 is manually pulled to retract, and the manual pull wire 4-1 drives the release rod 7 to rotate clockwise. When the release rod 7 rotates to contact the linkage portion 6-1 of the pawl 6, the pawl 6 rotates in conjunction with the release rod 7 until the pawl 6 contacts the limiting portion 1-1 of the bottom plate 1. At this time, the pawl 6 is at the rotation limit position for the first time, and at the same time, the first meshing portion 6-2 of the pawl 6 is disengaged from the first meshing point 8-1 of the lock hook 8. The lock hook 8 then rotates counterclockwise under the rebound force of the lock hook spring 11 until the second meshing portion 6-3 of the pawl 6 is meshed with the third meshing point 8-3 of the lock hook 8, completing the first-level manual unlocking.

[0044] like Fig. 9 As shown, the manual pull wire 4-1 is released again, the manual pull wire 4-1 extends out to reset, the release rod 7 rotates counterclockwise to reset under the rebound force of the release rod spring 10, and the pawl 6 rotates counterclockwise to reset under the rebound force of the pawl spring 9, and the second meshing portion 6-3 of the pawl 6 is disengaged from the third meshing point 8-3 of the lock hook 8, and the lock hook 8 continues to rotate counterclockwise under the rebound force of the lock hook spring 11 until the second meshing point 8-2 of the lock hook 8 is meshed with the first meshing portion 6-2 of the pawl 6, at which time the front cover lock is in a semi-locked state;

[0045] like Fig.10 As shown, the manual pull wire 4-1 is manually pulled back for the second time, and the manual pull wire 4-1 drives the release rod 7 to rotate clockwise again. When the release rod 7 rotates to contact the linkage part 6-1 of the pawl 6, the pawl 6 rotates in conjunction with the release rod 7 until the pawl 6 contacts the limiting part 1-1 of the bottom plate 1. At this time, the pawl 6 is at the rotation limit position for the second time, and the second meshing point 8-2 of the lock hook 8 is disengaged from the first meshing part 6-2 of the pawl 6. The lock hook 8 continues to rotate counterclockwise under the rebound force of the lock hook spring 11 until the lock hook 8 contacts the cover plate 5, completing the secondary manual unlocking.

[0046] like Fig.11 As shown, the manual pull wire 4-1 is released again, and the manual pull wire 4-1 is extended again to reset. The release rod 7 rotates counterclockwise to reset under the rebound force of the release rod spring 10, and the pawl 6 rotates counterclockwise to reset under the rebound force of the pawl spring 9. At this time, the front cover lock is in a fully unlocked state, completing the entire manual unlocking process.

[0047] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An unlocking device for a car hood lock, Features: The invention comprises a base plate (1), an electric actuator (2), an electric wire drawing assembly (3), a manual wire drawing assembly (4) and a cover plate (5); a ratchet (6), a release rod (7) and a lock hook (8) are rotatably arranged on the base plate (1); the base plate (1), the ratchet (6), the release rod (7) and the cover plate (5) are arranged in sequence; the ratchet (6) and the release rod (7) rotate coaxially; a ratchet spring (9) is arranged between the ratchet (6) and the base plate (1); a release rod spring (10) is arranged between the release rod (7) and the cover plate (5); a top plate (8-4) is fixedly arranged on the lock hook (8); a lock hook spring (11) is arranged between the top plate (8-4) and the base plate (1); and the base plate (1) has a limiting portion (1-1) for limiting the rotation limit position of the ratchet (6); The electric actuator (2), the electric wire pull assembly (3) and the ratchet (6) are connected in sequence, the manual wire pull assembly (4) is connected to the release rod (7), and the ratchet (6) has a linkage part (6-1). When the manual wire pull assembly (4) drives the release rod (7) to rotate until it contacts the linkage part (6-1), the ratchet (6) rotates in conjunction with the release rod (7); The bottom plate (1) is provided with a first micro switch (12) and a second micro switch (13); the lock hook (8) is provided with a first meshing point (8-1), a second meshing point (8-2) and a third meshing point (8-3) in sequence along its rotational circumference; the pawl (6) is provided with a first meshing portion (6-2) and a second meshing portion (6-3) in sequence around its rotational circumference; when the first meshing portion (6-2) and the first meshing point (8-1) are meshed, the front cover lock is in a fully locked state; when the second meshing portion (6-3) and the third meshing portion (6-3) are meshed, the front cover lock is in a fully locked state. When the engagement point (8-3) is engaged and the pawl (6) contacts the limit portion (1-1), the pawl (6) is located at the rotation limit position for the first time, and the lock hook (8) triggers the first micro switch (12); when the first engagement portion (6-2) and the second engagement point (8-2) are engaged, the front cover lock is in a semi-locked state; when the pawl (6) is located at the rotation limit position for the second time, the lock hook (8) triggers the second micro switch (13); when the pawl (6) and the lock hook (8) are out of contact, the front cover lock is fully opened and unlocked.

2. The unlocking device for the automobile hood lock according to claim 1, Features: The electric wire pull assembly (3) comprises a slider housing (3-1), a slider (3-2), an electric wire pull (3-3) and an electric wire housing (3-4); the slider (3-2) is slidably arranged in the slider housing (3-1); the electric wire pull (3-3) is slidably arranged in the electric wire housing (3-4); the housing (2-2), the slider housing (3-1), the electric wire housing (3-4) and the bottom plate (1) of the electric actuator (2) are fixedly connected in sequence; the telescopic rod (2-1), the slider (3-2), the electric wire pull (3-3) and the ratchet (6) of the electric actuator (2) are fixedly connected in sequence.

3. The unlocking device for the automobile hood lock according to claim 2, Features: The housing (2-2), the slider housing (3-1), the electric wire housing (3-4) and the bottom plate (1) of the electric actuator (2) are fixedly connected in sequence by means of snap-fitting, and the telescopic rod (2-1), the slider (3-2), the electric pull wire (3-3) and the ratchet (6) of the electric actuator (2) are also fixedly connected in sequence by means of snap-fitting.

4. The unlocking device for the front bonnet lock of an automobile according to claim 2 or 3, Features: The slider housing (3-1) is a split structure and is fixedly connected by snapping.

5. The unlocking device for the automobile bonnet lock according to claim 1 or 2, Features: The manual pull wire assembly (4) comprises a manual pull wire (4-1) and a manual wire housing (4-2), wherein the manual pull wire (4-1) is slidably arranged in the manual wire housing (4-2), and the manual pull wire (4-1) is fixedly connected to a release rod (7).

6. The unlocking device for the automobile bonnet lock according to claim 5, Features: The manual pull wire (4-1) is fixedly connected to the release rod (7) by means of a snap connection.

7. The unlocking device for the automobile hood lock according to claim 1, Features: The ratchet pawl (6) and the release rod (7) are both rotatably arranged on the bottom plate (1) via a ratchet pawl shaft (14), and the lock hook (8) is rotatably arranged on the bottom plate (1) via a lock hook shaft (15).

8. The unlocking device for the automobile hood lock according to claim 1, Features: The ratchet spring (9) is a torsion spring, and the release rod spring (10) and the lock hook spring (11) are both tension springs.

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