Low-operating-force automobile door lock mechanism

Abstract

The invention discloses a low-operating-force automobile door lock mechanism, and relates to the technical field of automobile door lock mechanisms, the low-operating-force automobile door lock mechanism comprises a spring bolt mounted on a bottom plate, the bottom plate is further provided with an actuating assembly for driving the spring bolt to rotate, and the actuating assembly comprises an opening connecting rod, a locking mechanism and a locking mechanism, the opening transition rod rotates on the bottom plate and is driven by the opening connecting rod to rotate; the second pawl rotates on the bottom plate and is driven by the opening transition rod to rotate; the pawl operating rod rotates on the bottom plate and is driven by the opening connecting rod to rotate; and the first pawl rotates on the bottom plate and is driven by the pawl operating rod to rotate. Aiming at higher performance expectation of customers on the market, the vehicle door opening performance of the customers under extreme working conditions such as low-temperature and low-voltage sealing force of the product and extreme sealing force after the vehicle door is impacted can be met.

Description

Technical Field

[0001] The invention relates to the technical field of automobile door lock mechanisms, and in particular to a low-operation-force automobile door lock mechanism. Background Art

[0002] With the continuous development and growth of our country's automobile market, there are higher requirements for the intelligence, automation, access convenience and opening performance of automobile door lock systems under near-end working conditions, such as electric door opening at 1KN sealing force under low temperature and low voltage; normal opening of the internal and external opening mechanical mechanisms under extremely high return force of 5KN when the door is deformed by impact, etc. Many automobile manufacturers respond to market demand and improve market competitiveness, and need higher-performance automobile door locks to win the market. Summary of the invention

[0003] The purpose of the present invention is to solve the problem in the prior art that a higher performance automobile door lock is required, and to propose a low operating force automobile door lock mechanism.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A low-operation-force automobile door lock mechanism comprises a lock tongue mounted on a base plate, an actuating assembly for driving the lock tongue to rotate is also mounted on the base plate, and the actuating assembly comprises:

[0006] An opening connecting rod is rotated on the bottom plate;

[0007] An opening transition rod is rotated on the bottom plate and driven to rotate by the opening connecting rod;

[0008] A second pawl rotates on the bottom plate and is driven to rotate by the opening transition rod;

[0009] A ratchet lever, which rotates on the bottom plate and is driven to rotate by the opening link;

[0010] A first pawl is rotated on the bottom plate and driven to rotate by the pawl operating lever;

[0011] The first pawl and the second pawl are connected via a snap-fit ​​portion A, and the first pawl and the lock tongue are connected via a snap-fit ​​portion B; when the second pawl rotates, it disengages from the first pawl, and when the first pawl rotates, the lock between the first pawl and the lock tongue is released.

[0012] Preferably, the opening link is driven to rotate by an opening mechanism, and the opening mechanism includes an outer opening mechanism, an inner opening mechanism and an electric opening mechanism;

[0013] The outer opening mechanism and the inner opening mechanism both include a cable assembly, a connecting rod and a safety mechanism;

[0014] The electric opening mechanism comprises a driving motor, a worm and a worm wheel.

[0015] Preferably, the outer wall of the lock tongue is provided with an outer hook limiting portion, a lock tongue groove, a guide protrusion, a lock tongue positioning portion, a lock tongue main locking groove, a lock tongue full locking limiting portion and a lock tongue deceleration locking portion.

[0016] Preferably, the opening link is provided with an opening transition lever actuating portion, a pawl operating lever actuating portion, an outer opening mechanism actuating portion, an inner opening mechanism actuating portion and an electric opening mechanism actuating portion;

[0017] The outer opening mechanism actuates the outer opening mechanism actuating part to cause the opening link to rotate; the inner opening mechanism actuates the inner opening mechanism actuating part to cause the opening link to rotate; the electric opening mechanism actuates the electric opening mechanism actuating part to cause the opening link to rotate.

[0018] Preferably, the opening transition rod is provided with an opening transition rod rotating shaft, a second ratchet actuating portion and an opening transition rod driven portion;

[0019] After the opening transition rod actuating portion contacts the opening transition rod driven portion, the opening transition rod is caused to rotate around the opening transition rod rotation axis.

[0020] Preferably, the second pawl is provided with a first pawl limiting portion, a second pawl sliding portion and a second pawl rotating shaft.

[0021] Preferably, a locking tongue limiting portion is further provided on the second pawl. When the locking tongue limiting portion and the outer hook limiting portion are aligned, the second pawl is disengaged from the first pawl, and the first pawl can rotate relative to the locking tongue.

[0022] Preferably, the ratchet operating lever is provided with a ratchet operating lever driven portion and a first ratchet connecting portion A;

[0023] After the actuating portion of the pawl lever abuts against the driven portion of the pawl lever, the pawl lever is caused to rotate, and the first pawl is caused to rotate through the first pawl connecting portion A.

[0024] Preferably, the first pawl is provided with:

[0025] The lock tongue is in a fully locked position. When the main locking groove of the lock tongue is aligned with the lock tongue in the fully locked position, the lock tongue is locked in the fully locked position by the first pawl;

[0026] A first pawl locking portion, which is an embedded groove, when the first pawl limiting portion is aligned with the first pawl locking portion, the first pawl is locked by the second pawl;

[0027] A semi-locking portion, which is an external protruding structure, when the first pawl limiting portion is aligned with the semi-locking portion, the second pawl is locked by the first pawl;

[0028] A first pawl connecting portion B is fixedly connected to the first pawl connecting portion A, so that the pawl operating rod and the first pawl rotate around the opening transition rod rotation axis;

[0029] A first pawl sliding portion, wherein the guide protrusion actuates the first pawl to rotate through the side wall of the first pawl sliding portion, and when the guide protrusion is separated from the side wall of the first pawl sliding portion, the first pawl sliding portion slides along the outer wall of the guide protrusion;

[0030] The buckling part A is composed of the first pawl locking part and the first pawl limiting part; the buckling part B is composed of the lock tongue full locking part and the lock tongue deceleration locking part.

[0031] Preferably, a buffer block is further provided on the bottom plate, and when the full-locking limit portion of the lock tongue is aligned with the buffer block, the lock tongue is locked in the full-locking position.

[0032] The beneficial effects of the present invention are:

[0033] This application aims at the higher performance expectations of customers in the market and invents a new type of automobile door lock structure, which can meet customers' requirements for electric opening with 1KN sealing force, normal opening of the door by the inner and outer opening mechanisms under 5KN door return force, and other extreme door opening requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a front view of the overall lock body;

[0035] Figure 2 It is a side view of the overall lock body;

[0036] Figure 3 This is a schematic diagram of the position of the lock tongue pawl after the bottom plate is removed from the lock body;

[0037] Figure 4 A schematic diagram of the opening mechanism after the drive housing is removed from the lock body;

[0038] Figure 5 A side view of the positions of the lock tongue, the first pawl and the second pawl when the lock body is fully locked;

[0039] Figure 6 A front view of the positions of the lock tongue, the first pawl and the second pawl when the lock body is fully locked;

[0040] Figure 7 Schematic diagram of the positions of the lock tongue, the first pawl and the second pawl when the lock body is half locked;

[0041] Figure 8Schematic diagram of the positions of the lock tongue, the first pawl and the second pawl when the lock body is fully opened;

[0042] Fig. 9 Schematic diagram of the initial position of the opening mechanism;

[0043] Fig.10 Side view of the opening mechanism in its initial position;

[0044] Fig.11 Schematic diagram of the opening mechanism in a half-open state;

[0045] Fig.12 Side view of the opening mechanism in half-open state;

[0046] Fig.13 Schematic diagram of the opening mechanism in fully open release state;

[0047] Fig.14 Side view of the opening mechanism in fully opened and released state;

[0048] Fig.15 Schematic diagram of the lock tongue of the opening mechanism in the released state;

[0049] Fig.16 Schematic diagram of the lock body's initial position when the door is closed;

[0050] Fig.17 Schematic diagram of the lock body in the state of closing the door and about to be half locked;

[0051] Fig.18 Schematic diagram of the lock body continuing to close the door after the door is half locked;

[0052] Fig.19 Schematic diagram of the lock body closing the door to the fully locked state;

[0053] Fig. 20 Schematic diagram of the lock body closing to the final position;

[0054] Fig.21 Opening connecting rod diagram;

[0055] Fig. 22 Schematic diagram of opening transition rod;

[0056] Fig.23 Schematic diagram of the pawl lever;

[0057] Fig.24 Schematic diagram of the first pawl;

[0058] Fig.25 A schematic diagram of the first pawl and the pawl operating lever after assembly;

[0059] Fig.26 Schematic diagram of the second pawl;

[0060] Fig. 27 Schematic diagram of the lock tongue.

[0061] In the figure: 1, outer opening mechanism; 2, inner opening mechanism; 3, driver assembly housing; 4, driver assembly cover; 5, bottom plate; 6, lock tongue; 6a, outer hook limiter; 6b, lock tongue groove; 6c, guide protrusion; 6d, lock tongue positioning part; 6e, lock tongue main lock groove; 6f, lock tongue full lock limiter; 6g, lock tongue deceleration locking part; 7, second pawl; 7a, first pawl limiter; 7b, lock tongue limiter; 7c, second pawl sliding part; 7d, second pawl rotating shaft; 8, second pawl rivet; 9, first pawl; 9a, lock tongue full lock; 9b, first pawl locking part; 9c, half lock part; 9d, first pawl connecting part B; 9e, first pawl Sliding part; 10. first ratchet rivet; 11. lock body shell; 12. lock tongue buffer block; 13. electric opening mechanism; 14. opening connecting rod; 14a. opening transition rod actuating part; 14b. ratchet operating rod actuating part; 14c. external opening mechanism actuating part; 14d. internal opening mechanism actuating part; 14e. electric opening mechanism actuating part; 15. ratchet operating rod; 15a. ratchet operating rod follower; 15b. first ratchet connecting part A; 16. second ratchet spring; 17. opening transition rod; 17a. opening transition rod rotating shaft; 17b. opening transition rod rotating shaft; 17c. opening transition rod follower; 18. first ratchet spring; 19. lock tongue rivet. DETAILED DESCRIPTION

[0062] A low-operation-force automobile door lock mechanism includes a lock tongue 6 mounted on a base plate 5, and an actuating assembly for driving the lock tongue 6 to rotate is also mounted on the base plate 5, wherein the actuating assembly includes an opening connecting rod 14, an opening transition rod 17, a second pawl 7, a pawl operating rod 15 and a first pawl 9.

[0063] Reference Figure 1 and Figure 2 The automobile door lock mechanism of one embodiment of the present disclosure further comprises an external opening mechanism 1, which is composed of a cable assembly, a connecting rod and a safety mechanism; an internal opening mechanism 2, which is composed of a cable assembly, a connecting rod and a safety mechanism; and an electric opening mechanism 13, which is composed of a driving motor, a worm and a worm gear, and drives the opening connecting rod to rotate around its rivet. The above mechanisms are located in the driver of the base plate 5, and the driver is fixed to the base plate 5 by rivets. The lock tongue 6 is installed on the base plate 5 by the lock tongue rivet 19, and can rotate within the full lock and full open range.

[0064] It should be added that the external opening mechanism 1, the internal opening mechanism 2 and the electric opening mechanism 13 can all drive the opening link 14 to rotate around the rivet installed thereon, and the above three mechanisms are provided in at least one group. The driver includes a driver assembly housing 3 and a driver assembly cover plate 4.

[0065] Combine the following Figure 3 and Figure 4 The automobile door lock of the preferred embodiment of the present disclosure is described as follows:

[0066] Figure 3 To remove the internal locking mechanism after the base plate 5, the lock tongue 6 is in the fully locked position, and is engaged with the lock tongue main locking groove 6e by the lock tongue fully locked position 9a of the first pawl 9; the first pawl 9 is simultaneously engaged with the first pawl limiting portion 7a of the second pawl 7 in the first pawl locking portion 9b.

[0067] Among them, the first pawl 9 is assembled on the bottom plate 5 through the first pawl rivet 10; the second pawl 7 is assembled on the bottom plate 5 through the second pawl rivet 8; in addition, a lock tongue buffer block 12 is also provided on the bottom plate 5, which is used to slow down and reduce noise when the rear door is fully locked.

[0068] Figure 4 After removing the driver assembly cover plate 4, the transmission mechanism inside the housing, such as Figure 4 As shown: the outer opening mechanism 1 is operated to push the outer opening mechanism actuating portion 14c on the opening link 14, the opening link 14 rotates, and the opening transition lever actuating portion 14a pushes the opening transition lever driven portion 17c on the opening transition lever 17, and the opening transition lever 17 drives the second pawl rotating shaft 7d on the second pawl 7 through the opening transition lever rotating shaft 17b, so that the first pawl 9 and the second pawl 7 are first disengaged; the opening link 14 continues to rotate, and its pawl operating lever actuating portion 14b starts to push the pawl operating lever 1 5, thereby driving the first pawl 9 to disengage from the lock tongue 6 and opening the door; similarly, the inner opening mechanism 2 is operated to push the inner opening mechanism actuating portion 14d on the opening link 14, thereby causing the opening link 14 to release the first pawl 9 and the second pawl 7 and open the door; similarly, the electric opening mechanism 13 pushes the electric opening mechanism actuating portion 14e on the opening link 14 through the cam mechanism on the worm gear, thereby causing the opening link 14 to release the first pawl 9 and the second pawl 7 and open the door.

[0069] Figure 5 Figure 6 This is a schematic diagram of the positions of the lock tongue 6, the first pawl 9 and the second pawl 7 when the motor vehicle is locked in the fully locked position under an implementation method disclosed in this embodiment. When the door lock is in the fully locked position, the lock tongue main lock groove 6e of the lock tongue 6 is restricted by the lock tongue fully locked position 9a of the first pawl 9, so that it cannot rotate in the door opening direction, and at the same time, the first pawl locking portion 9b of the first pawl 9 is restricted by the first pawl limiting portion 7a on the second pawl 7, so that it cannot move in the direction of leaving the lock tongue 6, and at the same time, the second pawl 7 is restricted in the current position by the second pawl spring 16, wherein the second pawl spring 16 is wound outside the second pawl rivet 8.

[0070] Figure 7Schematic diagram of the positions of the lock tongue 6, the first ratchet 9 and the second ratchet 7 when the motor vehicle lock disclosed in this embodiment is in the semi-locked position. When the door lock is in the semi-locked position, the lock tongue 6 is restricted by the lock tongue full lock position 9a of the first ratchet 9 at the lock tongue positioning portion 6d, so that it cannot rotate in the door opening direction. At the same time, the first ratchet locking portion 9b of the first ratchet 9 is restricted by the first ratchet limiting portion 7a on the second ratchet 7, so that it cannot move in the direction of leaving the lock tongue 6. At the same time, the second ratchet 7 is restricted in the current position by the second ratchet spring 16.

[0071] Figure 8 Schematic diagram of the positions of the lock tongue 6, the first pawl 9 and the second pawl 7 when the motor vehicle lock is in the fully open position in one embodiment disclosed in the present embodiment. When the door lock is in the fully open position, the lock tongue 6 is disengaged from the first pawl 9, and the lock tongue 6 can move clockwise in the door closing direction. At this time, the lock tongue limiting portion 7b on the second pawl 7 is restricted by the outer hook limiting portion 6a of the lock tongue 6, so that it cannot be engaged with the first pawl locking portion 9b of the first pawl 9, thereby being unable to restrict the first pawl 9 from moving in the direction of disengaging from the lock tongue 6.

[0072] Combine the following Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.15 The lock body opening process of the preferred embodiment of the present disclosure is described in detail:

[0073] refer to Fig. 9 and Fig.10 , which is a schematic diagram of the opening transmission chain position when fully locked. At this time, the opening mechanism pushes the opening connecting rod 14 to rotate clockwise, and the opening transition rod actuating portion 14a begins to contact and push the opening transition rod driven portion 17c of the opening transition rod 17. The opening transition rod 17 rotates counterclockwise in the lock body housing 11 around the opening transition rod rotating shaft 17a thereon, and the opening transition rod rotating shaft 17b begins to contact and push the second pawl rotating shaft 7d on the second pawl 7. The second pawl 7 rotates counterclockwise, and the first pawl limiting portion 7a gradually disengages from the full locking position 9a of the lock tongue in the first pawl 9, so that the rotation direction of the first pawl 9 out of the engagement direction of the lock tongue 6 is no longer restricted.

[0074] like Fig.11 and Fig.12Position shown: the opening link 14 continues to rotate clockwise, the pawl operating rod actuating portion 14b begins to contact and push the pawl operating rod 15, causing the pawl operating rod 15 to rotate clockwise around the first pawl rivet 10, and the pawl operating rod 15 and the first pawl 9 rotate counterclockwise around the opening transition rod rotation axis 17a in the lock body housing 11 through their respective pawl operating rod driven portions 15a and the first pawl connecting portion B9d, and the opening transition rod rotation axis 17b begins to contact and push the second pawl rotation axis 7d of the second pawl 7, and the second pawl 7 rotates counterclockwise, and the first pawl limiting portion 7a gradually disengages from the meshing with the lock tongue full locking position 9a in the first pawl 9, so that the rotation direction of the first pawl 9 out of the meshing direction of the lock tongue 6 is no longer restricted. In addition, the opening link 14 continues to rotate a certain angle, and the pawl operating lever actuator 14b begins to contact and push the pawl operating lever follower 15a of the pawl operating lever 15. Since the pawl operating lever 15 and the first pawl 9 are fixedly assembled into one body through the first pawl connecting portion A15b and the first pawl connecting portion B9d, the first pawl 9 synchronously moves in the direction of disengaging from the lock tongue 6, thereby gradually disengaging the lock tongue full lock position 9a from the lock tongue main lock groove 6e in the lock tongue 6.

[0075] like Fig.13 and Fig.14 Position shown: the lock tongue 6 rotates counterclockwise around the lock tongue rivet 19 under the action of the lock tongue spring and the door return force, releasing the door, as shown in FIG. Fig.15 As shown; the final opening mechanism is reset, the opening connecting rod 14, the lock tongue 6, the first pawl 9, the second pawl 7 under the action of their respective reset springs, back to the Figure 8 The door opens when the button is pressed to the position shown.

[0076] Combine the following Fig.16 , Fig.17 , Fig.18 , Fig.19 and Fig. 20 The lock body closing and locking process of the preferred embodiment of the present disclosure is described in detail:

[0077] like Fig.16 As shown in the figure, when the lock body is in the fully open position, the lock tongue limiting portion 7b on the second pawl 7 is limited by the outer hook limiting portion 6a of the lock tongue 6. At this time, the first pawl limiting portion 7a on the second pawl 7 and the semi-locking portion 9c on the first pawl 9 are in a disengaged state, indicating that the movement of the first pawl 9 in the direction of disengaging from the lock tongue 6 is not limited by the second pawl 7. When closing the door, the lock hook pushes the lock tongue 6 to rotate counterclockwise, and gradually pushes the first pawl sliding portion 9e away through the guide protrusion 6c, and slides along the surface of the guide protrusion 6c. When the lock tongue 6 rotates to Fig.17 Location.

[0078] like Fig.17As shown, the lock tongue 6 releases the restriction on the lock tongue limiting portion 7b through the lock tongue groove 6b, and the second pawl sliding portion 7c of the second pawl 7 contacts the first pawl locking portion 9b of the first pawl 9 under the action of the restoring force of the second pawl spring 16 and slides on its surface, the lock tongue 6 continues to rotate a certain angle, the guide protrusion 6c releases the restriction on the first pawl 9, and the first pawl 9 rotates counterclockwise under the action of the first pawl spring 18 to enter the meshing position. At the same time, the first pawl locking portion 9b releases the restriction on the lock tongue limiting portion 7b, and the second pawl 7 rotates counterclockwise under the action of the second pawl spring 16, and the transition rod rotating shaft 7a is opened and enters a semi-locked meshing state with the semi-locking portion 9c, as shown in FIG. Figure 7 Status shown.

[0079] The lock tongue 6 continues to rotate counterclockwise, and the guide protrusion 6c contacts and pushes away the lock tongue limiting portion 7b on the second pawl 7, and then causes it to slide along the surface of the guide protrusion 6c. The clockwise rotation of the second pawl 7 causes the first pawl limiting portion 7a to be out of engagement with the semi-locking portion 9c, and then the lock tongue main locking groove 6e of the main locking feature of the lock tongue 6 gradually pushes away the first pawl sliding portion 9e. Fig.18 Location shown.

[0080] The bolt 6 continues to rotate until it reaches Fig.19 When in the position shown, the lock tongue 6 releases the restriction on the lock tongue limiting portion 7b through the lock tongue groove 6b, and the second pawl sliding portion 7c on the second pawl 7 contacts the first pawl locking portion 9b on the first pawl 9 under the action of the restoring force of the second pawl spring 16 and slides on its surface, the lock tongue 6 continues to rotate a certain angle, the lock tongue main lock groove 6e releases the restriction on the first pawl 9, and the first pawl 9 rotates counterclockwise under the action of the first pawl spring 18 to enter the meshing position. At the same time, the first pawl locking portion 9b releases the restriction on the lock tongue limiting portion 7b, and the second pawl 7 rotates counterclockwise under the action of its second pawl spring 16, and the first pawl limiting portion 7a and the semi-locking portion 9c on the second pawl 9 enter a fully locked meshing state, as shown in FIG. Fig. 20 and Figure 6 The state is shown, thereby completing the locking and closing door action.

[0081] Fig.21 1 is a schematic diagram of the detailed features of the opening link 14 used in the motor vehicle lock disclosed in this embodiment. As shown in the figure, it is responsible for converting the movement of the outer opening mechanism 1, the inner opening mechanism 2, and the electric opening mechanism 13 into its own rotation, and respectively pushes the opening transition rod 17 and the first pawl 9 to rotate through the opening transition rod actuating portion 14a and the pawl operating rod actuating portion 14b, thereby releasing the lock tongue 6, thereby opening the lock body and the vehicle door.

[0082] Fig. 22It is a schematic diagram of the detailed features of the opening transition rod 17 used in the motor vehicle lock disclosed in this embodiment. The opening transition rod rotating shaft 17a is assembled in the positioning hole of the lock body shell 11, and the opening transition rod driven part 17c is driven by the opening transition rod actuating part 14a of the opening connecting rod 14, and then drives the second pawl rotating shaft 7d of the second pawl 7 to move through the opening transition rod rotating shaft 17b, thereby releasing the lock on the first pawl 9.

[0083] Fig.23 , Fig.24 , Fig.25 It is an assembly schematic diagram and a detailed feature schematic diagram of the pawl operating lever 15 and the first pawl 9 used in the motor vehicle lock disclosed in this embodiment. The pawl operating lever 15 is assembled and fixedly connected with the first pawl connecting portion A15b and the first pawl connecting portion B9d on the first pawl 9. The pawl operating lever 15 is driven by the pawl operating lever actuating portion 14b on the opening link 14 through the pawl operating lever follower portion 15a, thereby driving the first pawl 9 to rotate, releasing the lock tongue 6, and finally opening the lock body and the vehicle door. The first pawl 9 is engaged with the lock tongue 6 at the lock tongue main lock groove 6e in the fully locked state and the lock tongue positioning part 6d in the semi-locked state through the lock tongue full lock position 9a, thereby keeping the vehicle door in the fully closed and semi-open states. The lock tongue full lock position 9a is a special eccentric structure relative to the pawl rotation center. When affected by the sealing force of the vehicle door, it tends to disengage from the lock tongue 6; the first pawl 9 controls the second pawl 7 to engage with the semi-locked part 9c at an appropriate position through the first pawl locking part 9b; the first pawl 9 is pushed away from the engaged position by the guide protrusion 6c and the lock tongue main lock groove 6e on the lock tongue 6 during the door closing process through the first pawl sliding part 9e; the first pawl 9 is locked in the current position by the first pawl limiting part 7a on the second pawl 7 through the first pawl locking part 9b when in the fully locked and semi-locked positions.

[0084] Fig.26 It is a schematic diagram of the detailed features of the second pawl 7 used in the motor vehicle lock disclosed in this embodiment. The first pawl limiting portion 7a is used to lock the semi-locking portion 9c of the first pawl 9 to keep the first pawl 9 in the engaged position. The lock tongue limiting portion 7b is used to be manipulated by the lock tongue 6 feature at an appropriate position to release the lock of the first pawl 9; the second pawl sliding portion 7c is used to control the locking of the first pawl 9 at an appropriate position; the second pawl rotating shaft 7d is used to be driven by the opening transition rod 17 to release the lock of the first pawl 9.

[0085] Fig. 27It is a schematic diagram of the detailed features of the lock tongue 6 used in the motor vehicle lock disclosed in this embodiment. The outer hook limiting portion 6a of the lock tongue 6 is used to limit the engagement of the second pawl 7 and the first pawl 9 when the lock body is fully open, so as to prevent movement interference when closing the door; the lock tongue groove 6b is used to release the restriction on the second pawl 7 when the lock body is half locked; the guide protrusion 6c is used to release the restriction on the second pawl 7 and the first pawl 9 from the lock body closing to the full lock process and to reversely drive the first pawl 9 before half lock; the lock tongue positioning portion 6d is used to lock the lock body in the half lock position; the lock tongue main lock groove 6e is used to lock the lock body in the full lock position and reversely drive the first pawl 9 from the half lock to the full lock process; the lock tongue full lock limiting portion 6f cooperates with the lock tongue buffer block 12 to lock the position of the lock tongue 6 when the lock body is in the full lock position; the lock tongue deceleration locking portion 6g is used to decelerate the movement of the lock tongue and lock the position after the lock body is fully locked.

[0086] The above description is only a preferred specific implementation manner 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 scheme and inventive concept 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. A low-operation-force automobile door lock mechanism, comprising a locking tongue mounted on a base plate, characterized in that: The bottom plate is also provided with an actuating assembly for driving the locking tongue to rotate, and the actuating assembly comprises: An opening connecting rod is rotated on the bottom plate; An opening transition rod is rotated on the bottom plate and driven to rotate by the opening connecting rod; A second pawl rotates on the bottom plate and is driven to rotate by the opening transition rod; A ratchet lever, which rotates on the bottom plate and is driven to rotate by the opening link; A first pawl is rotated on the bottom plate and driven to rotate by the pawl operating lever; The first pawl and the second pawl are connected via a snap-fit ​​portion A, and the first pawl and the lock tongue are connected via a snap-fit ​​portion B; when the second pawl rotates, it disengages from the first pawl, and when the first pawl rotates, the lock between the first pawl and the lock tongue is released.

2. A low-operation-force automobile door lock mechanism according to claim 1, characterized in that: The opening link is driven to rotate by the opening mechanism, and the opening mechanism includes an outer opening mechanism, an inner opening mechanism and an electric opening mechanism; The outer opening mechanism and the inner opening mechanism both include a cable assembly, a connecting rod and a safety mechanism; The electric opening mechanism comprises a driving motor, a worm and a worm wheel.

3. A low-operation-force automobile door lock mechanism according to claim 1, characterized in that: The outer wall of the lock tongue is provided with an outer hook limiting portion, a lock tongue groove, a guide protrusion, a lock tongue positioning portion, a lock tongue main locking groove, a lock tongue full locking limiting portion and a lock tongue deceleration locking portion.

4. A low-operation-force automobile door lock mechanism according to claim 3, characterized in that: The opening connecting rod is provided with an opening transition rod actuating part, a pawl operating rod actuating part, an outer opening mechanism actuating part, an inner opening mechanism actuating part and an electric opening mechanism actuating part; The outer opening mechanism actuates the outer opening mechanism actuating part to cause the opening link to rotate; the inner opening mechanism actuates the inner opening mechanism actuating part to cause the opening link to rotate; the electric opening mechanism actuates the electric opening mechanism actuating part to cause the opening link to rotate.

5. A low-operation-force automobile door lock mechanism according to claim 4, characterized in that: The opening transition rod is provided with an opening transition rod rotating shaft, a second ratchet pawl actuating portion and an opening transition rod driven portion; After the opening transition rod actuating portion contacts the opening transition rod driven portion, the opening transition rod is caused to rotate around the opening transition rod rotation axis.

6. A low-operation-force automobile door lock mechanism according to claim 5, characterized in that: The second pawl is provided with a first pawl limiting portion, a second pawl sliding portion and a second pawl rotating shaft.

7. A low-operation-force automobile door lock mechanism according to claim 6, characterized in that: The second pawl is also provided with a lock tongue limiting portion. When the lock tongue limiting portion and the outer hook limiting portion are aligned, the second pawl is disengaged from the first pawl, and the first pawl can rotate relative to the lock tongue.

8. A low-operation-force automobile door lock mechanism according to claim 7, characterized in that: The ratchet operating lever is provided with a ratchet operating lever driven portion and a first ratchet connecting portion A; After the actuating portion of the pawl lever abuts against the driven portion of the pawl lever, the pawl lever is caused to rotate, and the first pawl is caused to rotate through the first pawl connecting portion A.

9. A low-operation-force automobile door lock mechanism according to claim 8, characterized in that: The first pawl is provided with: The lock tongue is in a fully locked position. When the main locking groove of the lock tongue is aligned with the lock tongue in the fully locked position, the lock tongue is locked in the fully locked position by the first pawl; A first pawl locking portion, which is an embedded groove, when the first pawl limiting portion is aligned with the first pawl locking portion, the first pawl is locked by the second pawl; A semi-locking portion, which is an external protruding structure, when the first pawl limiting portion is aligned with the semi-locking portion, the second pawl is locked by the first pawl; A first pawl connecting portion B is fixedly connected to the first pawl connecting portion A, so that the pawl operating rod and the first pawl rotate around the opening transition rod rotation axis; A first pawl sliding portion, wherein the guide protrusion actuates the first pawl to rotate through the side wall of the first pawl sliding portion, and when the guide protrusion is separated from the side wall of the first pawl sliding portion, the first pawl sliding portion slides along the outer wall of the guide protrusion; The buckling part A is composed of the first pawl locking part and the first pawl limiting part; the buckling part B is composed of the lock tongue full locking part and the lock tongue deceleration locking part.

10. The low-operation-force automobile door lock mechanism according to claim 3, characterized in that: The bottom plate is also provided with a buffer block, and when the full-locking limit portion of the lock tongue is aligned with the buffer block, the lock tongue is locked in the full-locking position.

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