Low-operating-force automobile door lock mechanism

Abstract

The utility model discloses an automobile door lock mechanism with low operating force, and relates to the technical field of automobile door lock mechanisms, the automobile door lock mechanism comprises a spring bolt arranged on a bottom plate, the bottom plate is also provided with an actuating assembly for driving the spring bolt to rotate, the actuating assembly comprises an opening connecting rod which rotates on the bottom plate; 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 the 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 utility model relates to a car door lock mechanism technical field especially relates to a low operating force car door lock mechanism. BACKGROUND

[0002] With our country automobile market's continuous development and expansion, the intelligentization, automation, in and out convenience and the opening performance under the near end working condition of automobile door lock system have higher requirement, such as 1KN sealing force under low temperature and low voltage, electric opening car door under the extremely high return force 5KN when car door is impacted and deformed, and the normal opening of inside and outside opening mechanical mechanism etc.. Many automobile manufacturers respond market demand, improve market competitiveness, need higher performance automobile door lock to win the market. INVENTION CONTENTS

[0003] The utility model discloses a low operating force car door lock mechanism, which solves the problem of higher performance automobile door lock in the prior art.

[0004] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A low operating force car door lock mechanism, comprising a lock tongue installed on a bottom plate, an actuating assembly for driving the lock tongue to rotate is also installed on the bottom 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 is driven to rotate by the opening connecting rod;

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

[0009] A pawl operating rod is rotated on the bottom plate and is driven to rotate by the opening connecting rod;

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

[0011] The first pawl and the second pawl are connected through a buckling part A, and the first pawl and the lock tongue are connected through a buckling part B; when the second pawl rotates and is separated from the buckling with the first pawl, and the first pawl rotates, the locking between the first pawl and the lock tongue is released.

[0012] Preferably, the opening connecting rod is driven to rotate by an opening mechanism, and the opening mechanism comprises an outside opening mechanism, an inside opening mechanism and an electric opening mechanism;

[0013] The outside opening mechanism and the inside opening mechanism both comprise 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 connecting rod is provided with an opening transition rod actuating portion, a pawl operating rod 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 portion, so as to rotate the opening connecting rod; the inner opening mechanism actuates the inner opening mechanism actuating portion, so as to rotate the opening connecting rod; and the electric opening mechanism actuates the electric opening mechanism actuating portion, so as to rotate the opening connecting rod.

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

[0019] After the opening transition rod actuating portion abuts against the opening transition rod driven portion, the opening transition rod rotates around the opening transition rod rotating shaft.

[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, the second pawl is further provided with a lock tongue limiting portion, when the lock tongue limiting portion is aligned with the outer hook limiting portion, the second pawl is disengaged from the first pawl, and the first pawl can rotate relative to the lock tongue.

[0022] Preferably, the pawl operating rod is provided with a pawl operating rod driven portion and a first pawl connecting portion A.

[0023] After the pawl operating rod actuating portion abuts against the pawl operating rod driven portion, the pawl operating rod rotates, and the first pawl rotates through the first pawl connecting portion A.

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

[0025] a lock tongue full locking position, when the lock tongue main locking groove is aligned with the lock tongue full locking position, the lock tongue is locked in the full locking position by the first pawl;

[0026] a first pawl locking portion in the form of 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] Half lock part, it is the outer convex structure, when the first pawl limiting part is located the half lock part, the second pawl is locked by the first pawl;

[0028] First pawl connecting part B, with the first pawl connecting part A fixed connection, make the pawl operating rod with first pawl rotate around the opening transition rod rotation axis;

[0029] First pawl sliding part, the guide protrusion is actuated the first pawl rotation through the first pawl sliding part side wall, when the guide protrusion is separated from the first pawl sliding part side wall, the first pawl sliding part is along the guide protrusion outer wall sliding;

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

[0031] Preferably, the bottom plate is also provided with a buffer block, when the lock tongue full lock limiting part is located the buffer block, the lock tongue is locked in full lock position.

[0032] The beneficial effects of the utility model are:

[0033] The present application aims at the higher performance expectation of customers in the market, and a novel automobile door lock structure is invented.The novel automobile door lock structure can meet the requirements of customers on door opening under extreme working conditions such as 1KN sealing force electric opening, 5KN door return force, and normal opening of inner and outer opening mechanisms. BRIEF DESCRIPTION OF DRAWINGS

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

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

[0036] Figure 3 It is the schematic view of the lock tongue pawl position after the lock body removes the bottom plate;

[0037] Figure 4 It is the schematic view of the opening mechanism after the lock body removes the driver shell;

[0038] Figure 5 It is the side view of the lock tongue, first pawl and second pawl position when the lock body is full lock;

[0039] Figure 6 It is the front view of the lock tongue, first pawl and second pawl position when the lock body is full lock;

[0040] Figure 7 It is the schematic view of the lock tongue, first pawl and second pawl position when the lock body is half lock;

[0041] Figure 8 For the lock body full open, the bolt, the first pawl and the second pawl position schematic diagram;

[0042] Figure 9 For the opening mechanism initial position schematic diagram;

[0043] Figure 10 For the opening mechanism initial position side view;

[0044] Figure 11 For the opening mechanism half open state schematic diagram;

[0045] Figure 12 For the opening mechanism half open state side view;

[0046] Figure 13 For the opening mechanism full open release state schematic diagram;

[0047] Figure 14 For the opening mechanism full open release state side view;

[0048] Figure 15 For the opening mechanism bolt release state schematic diagram;

[0049] Figure 16 For the lock body door closing initial position schematic diagram;

[0050] Figure 17 For the lock body door closing about to half lock state schematic diagram;

[0051] Figure 18 For the lock body door closing half lock, continue to close the state schematic diagram;

[0052] Figure 19 For the lock body door closing to full lock state schematic diagram;

[0053] Figure 20 For the lock body door closing to end position state schematic diagram;

[0054] Figure 21 For the opening link schematic diagram;

[0055] Figure 22 For the opening transition rod schematic diagram;

[0056] Figure 23 For the pawl operating rod schematic diagram;

[0057] Figure 24 For the first pawl schematic diagram;

[0058] Figure 25 For the first pawl and the pawl operating rod assembly after the schematic diagram;

[0059] Figure 26 For the second pawl schematic diagram;

[0060] Figure 27 The figure shows the 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 limiting part; 6b, lock tongue groove; 6c, guide protrusion; 6d, lock tongue positioning part; 6e, lock tongue main lock groove; 6f, lock tongue full lock limiting part; 6g, lock tongue deceleration locking part; 7, second pawl; 7a, first pawl limiting part; 7b, lock tongue limiting part; 7c, second pawl sliding part; 7d, second pawl rotating shaft; 8, second pawl rivet; 9, first pawl; 9a, lock tongue full lock position; 9b, first pawl locking part; 9c, half lock part; 9d, first pawl connecting part B; 9e, first pawl sliding part; 10, first pawl rivet; 11, lock body housing; 12, lock tongue buffer block; 13, electric opening mechanism; 14, opening connecting rod; 14a, opening transition rod actuating part; 14b, pawl operating rod actuating part; 14c, outer opening mechanism actuating part; 14d, inner opening mechanism actuating part; 14e, electric opening mechanism actuating part; 15, pawl operating rod; 15a, pawl operating rod driven part; 15b, first pawl connecting part A; 16, second pawl spring; 17, opening transition rod; 17a, opening transition rod rotating shaft; 17b, opening transition rod rotating shaft; 17c, opening transition rod driven part; 18, first pawl spring; 19, lock tongue rivet. DETAILED DESCRIPTION

[0062] A low operating force automobile door lock mechanism includes a lock tongue 6 mounted on a bottom plate 5, and an actuating assembly for driving the rotation of the lock tongue 6, 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 a set of outer opening mechanism 1, which is composed of a cable assembly, a connecting rod, and a safety mechanism; a set of inner opening mechanism 2, which is composed of a cable assembly, a connecting rod, and a safety mechanism; and a set of electric opening mechanism 13, which is composed of a driving motor, a worm, and a worm gear, and drives the rotation of the opening connecting rod around the rivet thereof. The above-mentioned mechanisms are located in the driver of the bottom plate 5, and the driver is fixed to the bottom plate 5 by a rivet. The lock tongue 6 is mounted on the bottom plate 5 by a lock tongue rivet 19 and can rotate within the full lock and full open range.

[0064] It should be noted that the outer opening mechanism 1, the inner opening mechanism 2, and the electric opening mechanism 13 can all drive the rotation of the opening connecting rod 14 around the rivet mounted thereon, and at least one set of the above-mentioned three mechanisms is provided. The driver includes a driver assembly housing 3 and a driver assembly cover 4.

[0065] The preferred embodiments of the present disclosure are described below Figure 3 and Figure 4 The automobile door lock of the preferred embodiments of the present disclosure is described as follows:

[0066] Figure 3 To remove the internal locking mechanism after the bottom plate 5, the latch 6 is in the full lock position, engaged with the latch full lock position 9a of the first pawl 9 and the latch main locking groove 6e. The first pawl 9 is simultaneously engaged with the first pawl limiting portion 7a of the second pawl 7 and the first pawl locking portion 9b.

[0067] The first pawl 9 is assembled on the bottom plate 5 through the first pawl rivet 10, and the second pawl 7 is assembled on the bottom plate 5 through the second pawl rivet 8. In addition, the bottom plate 5 is also provided with a latch buffer block 12 for reducing the speed and noise of the vehicle door after full locking.

[0068] Figure 4 To remove the driver assembly cover plate 4, the transmission mechanism inside the shell is as shown in Figure 4 The outer opening mechanism 1 pushes the outer opening mechanism actuating portion 14c on the opening link 14 to rotate the opening link 14, which pushes the opening transition rod driven portion 17c on the opening transition rod 17 through the opening transition rod actuating portion 14a, and the opening transition rod 17 drives the second pawl rotating shaft 7d on the second pawl 7 through the opening transition rod 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 the pawl operating rod actuating portion 14b starts to push the pawl operating rod driven portion 15a on the pawl operating rod 15, thereby driving the first pawl 9 and the latch 6 to disengage, and the vehicle door is opened. Similarly, the inner opening mechanism 2 pushes the inner opening mechanism actuating portion 14d on the opening link 14, thereby releasing the first pawl 9 and the second pawl 7 of the opening link 14, and the vehicle door is opened. 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 releasing the first pawl 9 and the second pawl 7 of the opening link 14, and the vehicle door is opened.

[0069] Figure 5 Figure 6 In one embodiment of the present disclosure, when the motor vehicle lock is in the full lock position, the positions of the latch 6, the first pawl 9 and the second pawl 7 are shown in the schematic diagram. When the door lock is in the full lock position, the latch main locking groove 6e of the latch 6 is limited by the latch full lock position 9a of the first pawl 9, so that it cannot rotate in the door opening direction. At the same time, the first pawl locking portion 9b of the first pawl 9 is limited by the first pawl limiting portion 7a on the second pawl 7, so that it cannot move in the direction away from the latch 6. At the same time, the second pawl 7 is limited in the current position by the second pawl spring 16, wherein the second pawl spring 16 is arranged outside the second pawl rivet 8.

[0070] Figure 7is the position schematic diagram of the lock tongue 6, the first pawl 9 and the second pawl 7 when the motor vehicle lock disclosed in the embodiment is in the half-lock position. When the door lock is in the half-lock position, the lock tongue 6 is limited by the lock tongue full-lock position 9a of the first pawl 9 at the lock tongue positioning portion 6d, so that it cannot rotate in the door opening direction, at the same time, the first pawl locking portion 9b of the first pawl 9 is limited by the first pawl limiting portion 7a on the second pawl 7, so that it cannot move in the direction of disengaging the lock tongue 6, at the same time, the second pawl 7 is limited in the current position by the second pawl spring 16.

[0071] Figure 8 is the position schematic diagram of the lock tongue 6, the first pawl 9 and the second pawl 7 when the motor vehicle lock disclosed in the embodiment is in the full-open position. When the door lock is in the full-open position, the lock tongue 6 is disengaged from the first pawl 9, at this time, the lock tongue 6 can move in the door closing direction clockwise, at this time, 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, so that it cannot engage with the first pawl locking portion 9b of the first pawl 9, so that the first pawl 9 cannot move in the direction of disengaging the lock tongue 6.

[0072] The following will be described in detail in combination with Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 the opening process of the lock body of the preferred embodiment of the present disclosure:

[0073] Reference Figure 9 and Figure 10 is the position schematic diagram of the opening transmission chain when the lock is in the full-lock position, at this time, the opening mechanism pushes the opening connecting rod 14 to rotate clockwise, the opening transition rod actuating portion 14a starts 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 shell 11 around the opening transition rod rotating shaft 17a thereon, the opening transition rod rotating shaft 17b starts to contact and push the second pawl rotating shaft 7d on the second pawl 7, the second pawl 7 rotates counterclockwise, the first pawl limiting portion 7a gradually disengages from the engagement with the lock tongue full-lock position 9a in the first pawl 9, so that the rotation of the first pawl 9 in the direction of disengaging the lock tongue 6 is no longer limited.

[0074] As Figure 11 and Figure 12Position shown: the opening connecting rod 14 continues to rotate clockwise, the pawl operating rod actuating part 14b begins to contact and push the pawl operating rod 15, making the pawl operating rod 15 rotate clockwise around the first pawl rivet 10, the pawl operating rod 15 and the first pawl 9 rotate counterclockwise in the lock body shell 11 through the respective pawl operating rod driven part 15a and the first pawl connecting part B 9d around the opening transition rod rotating shaft 17a, the opening transition rod rotating shaft 17b begins to contact and push the second pawl rotating shaft 7d of the second pawl 7, the second pawl 7 rotates counterclockwise, the first pawl limiting part 7a gradually disengages from the engagement with the lock tongue full lock position 9a in the first pawl 9, so that the first pawl 9 is no longer limited in rotation in the direction of engagement with the lock tongue 6. In addition, the opening connecting rod 14 continues to rotate by a certain angle, the pawl operating rod actuating part 14b begins to contact and push the pawl operating rod driven part 15a of the pawl operating rod 15, and since the pawl operating rod 15 and the first pawl 9 are integrally connected through the first pawl connecting part A 15b and the first pawl connecting part B 9d, the first pawl 9 moves synchronously 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] As shown in Figure 13 and Figure 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 Figure 15 ; finally, the opening mechanism is reset, the opening connecting rod 14, the lock tongue 6, the first pawl 9, and the second pawl 7 return to the position shown in Figure 8 , completing the door opening action.

[0076] The lock body door closing and locking process of the preferred embodiment of the present disclosure will be described in detail below: Figure 16 , Figure 17 , Figure 18 , Figure 19 and Figure 20 .

[0077] As shown in Figure 16 , when the lock body is fully open, the lock tongue limiting part 7b on the second pawl 7 is limited by the outer hook limiting part 6a of the lock tongue 6, and at this time the first pawl limiting part 7a on the second pawl 7 is in a disengaged state with the half-lock part 9c on the first pawl 9, 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 away the first pawl sliding part 9e through the guide protrusion 6c, and slides along the surface of the guide protrusion 6c, when the lock tongue 6 rotates to Figure 17 position.

[0078] As shown in Figure 17As shown, the latch 6 releases the restriction of the latch limiting portion 7b through the latch groove 6b, the second pawl sliding portion 7c of the second pawl 7 contacts and slides on the surface of the first pawl locking portion 9b under the action of the second pawl spring 16, the latch 6 continues to rotate by a certain angle, the guide protrusion 6c releases the restriction of the first pawl 9, the first pawl 9 rotates counterclockwise into the meshing position under the action of the first pawl spring 18, at the same time, the first pawl locking portion 9b releases the restriction of the latch limiting portion 7b, and the second pawl 7 rotates counterclockwise under the action of the second pawl spring 16, the opening transition rod rotating shaft 7a and the half-lock portion 9c enter the half-lock meshing state, as shown in the Figure 7 state.

[0079] The latch 6 continues to rotate counterclockwise, the guide protrusion 6c contacts and pushes away the latch limiting portion 7b on the second pawl 7, and then makes it slide along the surface of the guide protrusion 6c, the clockwise rotation of the second pawl 7 makes the first pawl limiting portion 7a disengage from the meshing state with the half-lock portion 9c, and then the latch main locking groove 6e of the main locking feature of the latch 6 gradually pushes away the first pawl sliding portion 9e, as shown in the Figure 18 position.

[0080] The latch 6 continues to rotate, and when it reaches the Figure 19 position, the latch 6 releases the restriction of the latch limiting portion 7b through the latch groove 6b, the second pawl sliding portion 7c on the second pawl 7 contacts and slides on the surface of the first pawl locking portion 9b on the first pawl 9 under the action of the second pawl spring 16, the latch 6 continues to rotate by a certain angle, the latch main locking groove 6e releases the restriction of the first pawl 9, the first pawl 9 rotates counterclockwise into the meshing position under the action of the first pawl spring 18, at the same time, the first pawl locking portion 9b releases the restriction of the latch limiting portion 7b, and the second pawl 7 rotates counterclockwise under the action of the second pawl spring 16, the first pawl limiting portion 7a and the half-lock portion 9c on the second pawl 9 enter the full-lock meshing state, as shown in the Figure 20 and Figure 6 state, thereby completing the locking closing door action.

[0081] Figure 21 The opening connecting rod 14 used in the motor vehicle lock disclosed in the embodiment is shown in detail, as shown in the figure, 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, pushing 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 respectively, releasing the latch 6, and thereby opening the lock body and the door.

[0082] Figure 22is the detail feature diagram of the opening transition rod 17 used by 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. 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 through the opening transition rod rotating shaft 17b, and then releases the locking of the first pawl 9.

[0083] Figure 23 、 Figure 24 、 Figure 25 is the assembly diagram and detail feature diagram of the pawl operating rod 15 and the first pawl 9 used by the motor vehicle lock disclosed in this embodiment. The pawl operating rod 15 is assembled and fixed together through the first pawl connecting part A15b and the first pawl connecting part B9d on the first pawl 9. The pawl operating rod 15 is driven by the pawl operating rod actuating part 14b on the opening connecting rod 14 through the pawl operating rod driven part 15a, so as to drive the first pawl 9 to rotate, release the bolt 6, and finally open the lock body and the door. The first pawl 9 is engaged with the bolt 6 at the full lock position 9a, the bolt main lock groove 6e in the full lock state, and the bolt positioning part 6d in the half lock state, so as to keep the door in the fully closed and half open state. The full lock position 9a is a special eccentric structure relative to the pawl rotation center, and has a tendency to disengage from the engagement with the bolt 6 when affected by the door sealing force. The first pawl 9 controls the second pawl 7 to engage with the half lock part 9c in the appropriate position through the first pawl locking part 9b. The first pawl 9 is pushed away from the engagement position by the guide protrusion 6c and the bolt main lock groove 6e on the bolt 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 at the full lock and half lock positions through the first pawl locking part 9b.

[0084] Figure 26 is the detail feature diagram of the second pawl 7 used by the motor vehicle lock disclosed in this embodiment. The first pawl limiting part 7a is used to lock the half lock part 9c of the first pawl 9, and keep the first pawl 9 in the engagement position. The bolt limiting part 7b is used to be operated by the bolt 6 in the appropriate position to release the locking of the first pawl 9. The second pawl sliding part 7c is used to control the locking of the first pawl 9 in the appropriate position. The second pawl rotating shaft 7d is used to be driven by the opening transition rod 17 to release the locking of the first pawl 9.

[0085] Figure 27is a schematic view of the detailed features of the lock tongue 6 used by the motor vehicle lock disclosed in the present embodiment. The outer hook limiting portion 6a of the lock tongue 6 is used to limit the engagement of the second pawl 7 with the first pawl 9 when the lock body is fully open, preventing movement interference when the door is closed. The lock tongue groove 6b is used to release the limitation on the second pawl 7 when the lock body is half-locked. The guide protrusion 6c is used to release the limitation on the second pawl 7 and the reverse driving of the first pawl 9 during the process of closing the lock body to full locking. The lock tongue positioning portion 6d is used to lock the position of the lock body when it is half-locked. The main lock groove 6e of the lock tongue is used to lock the position of the lock body when it is fully locked and to reverse drive the first pawl 9 during the process of half-locking to full locking. The full-lock limiting portion 6f of the lock tongue cooperates with the lock tongue buffer block 12 to lock the position of the lock tongue 6 when the lock body is fully locked. The deceleration locking portion 6g of the lock tongue is used to decelerate and lock the position of the lock tongue after the lock body is fully locked.

[0086] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art, according to the technical scheme and the inventive concept of the present application, can make equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A low operating force automotive door lock mechanism comprising a strike installed on a floor panel, characterized in that, The bottom plate is further provided with an actuating assembly for driving the rotation of the lock tongue, and the actuating assembly comprises: an opening connecting rod which is rotatable on the bottom plate; an opening transition rod which is rotatable on the bottom plate and is driven to rotate by the opening connecting rod; a second pawl which is rotatable on the bottom plate and is driven to rotate by the opening transition rod; a pawl operating rod which is rotatable on the bottom plate and is driven to rotate by the opening connecting rod; a first pawl which is rotatable on the bottom plate and is driven to rotate by the pawl operating rod; the first pawl and the second pawl are connected through a buckling part A, and the first pawl and the lock tongue are connected through a buckling part B; when the second pawl rotates and is disengaged from the buckling with the first pawl, and the first pawl rotates, the buckling between the first pawl and the lock tongue is released.

2. A low force to operate automotive door lock mechanism as claimed in claim 1 wherein, The opening connecting rod is driven to rotate by an opening mechanism, and the opening mechanism comprises an outer opening mechanism, an inner opening mechanism and an electric opening mechanism. The outer opening mechanism and the inner opening mechanism each comprise 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 force to operate automotive door lock mechanism as claimed in claim 2 wherein, The outer wall of the lock tongue is provided with an outer hook limiting part, a lock tongue groove, a guide protrusion, a lock tongue positioning part, a lock tongue main locking groove, a lock tongue full locking limiting part and a lock tongue deceleration locking part.

4. A low force to operate automotive door lock mechanism as claimed in claim 3 wherein, 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, so as to cause the opening connecting rod to rotate; the inner opening mechanism actuates the inner opening mechanism actuating part, so as to cause the opening connecting rod to rotate; and the electric opening mechanism actuates the electric opening mechanism actuating part, so as to cause the opening connecting rod to rotate.

5. A low force to operate automotive door lock mechanism as claimed in claim 4 wherein, The opening transition rod is provided with an opening transition rod rotating shaft, a second pawl actuating part and an opening transition rod driven part. When the opening transition rod actuating part abuts against the opening transition rod driven part, the opening transition rod is caused to rotate around the opening transition rod rotating shaft.

6. A low force to operate automotive door lock mechanism as claimed in claim 5 wherein, The second pawl is provided with a first pawl limiting part, a second pawl sliding part and a second pawl rotating shaft.

7. A low force to operate automotive door lock mechanism as claimed in claim 6 wherein, The second pawl is further provided with a lock tongue limiting part, when the lock tongue limiting part and the outer hook limiting part 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 force to operate automotive door lock mechanism as claimed in claim 7 wherein, The pawl operating rod is provided with a pawl operating rod driven part and a first pawl connecting part A. When the pawl operating rod actuating part abuts against the pawl operating rod driven part, the pawl operating rod is caused to rotate, and the first pawl is caused to rotate through the first pawl connecting part A.

9. A low force to operate automotive door lock mechanism as claimed in claim 8 wherein, The first pawl is provided with: a lock tongue full locking position, when the lock tongue main locking groove is aligned with the lock tongue full locking position, the lock tongue is locked in the full locking position by the first pawl; a first pawl locking part which is an embedded groove, when the first pawl limiting part is aligned with the first pawl locking part, the first pawl is locked by the second pawl; a half locking part which is an external protruding structure, when the first pawl limiting part is aligned with the half locking part, the second pawl is locked by the first pawl. The first pawl connecting part B is fixedly connected with the first pawl connecting part A, so that the pawl operating rod and the first pawl rotate around the opening transition rod rotating shaft; The first pawl sliding part is actuated to rotate by the guide protrusion through the first pawl sliding part side wall, and when the guide protrusion is separated from the first pawl sliding part side wall, the first pawl sliding part slides along the guide protrusion outer wall; The buckle part A is composed of the first pawl locking part and the first pawl limiting part; the buckle part B is composed of the lock tongue full-locking position and the lock tongue deceleration locking part.

10. A low force to operate automotive door lock mechanism as claimed in claim 3 wherein, The bottom plate is further provided with a buffer block, and when the lock tongue full-locking limiting part is aligned with the buffer block, the lock tongue is locked in the full-locking position.

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