A motor vehicle door lock having an electric child lock function

Abstract

The utility model provides a kind of motor vehicle door lock with electric child lock function belongs to electric vehicle door lock field, including the lock bolt of unlocking system control being arranged on shell and being arranged on it, the lock bolt is arranged on shell: inside open unlocking pull rod reset signal switch, it is pressed and triggered;Position signal switch, it is pressed and triggered;Motor drive system, press inside open unlocking pull rod reset signal switch or position signal switch, record motor drive system at position one or position two by vehicle controller respectively, when motor drive system is at position one, door lock is at unlocking stage;When motor drive system is at position two, door lock is at locking stage.The utility model can realize electric child lock function by single motor drive system control, further reduce independent motor and drive system setting, realize integration using alternative transmission structure, compared with additional motor and drive system of prior art, reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle door locks, and more specifically, to a motor vehicle door lock with an electric child lock function. Background Technology

[0002] With the development of the automotive market, the requirements for automation and intelligence in vehicle opening and closing systems are gradually increasing. Side door automation and functional modularity are also improving, and customer demands for personalization and customization are constantly rising. The overall ease of vehicle operation is further enhanced. Previously, traditional mechanical child lock knobs or toggle switches required manual operation, which was inconvenient. At the same time, as users' safety awareness has increased, mechanical child locks may not function in certain scenarios, affecting the ability to open the door from the inside in emergencies. Therefore, more and more models are requiring electric child locks to improve the safety of rear passengers. However, currently, electric child locks on the market require independent motors and transmission systems, which increases costs for customers seeking added convenience. Utility Model Content

[0003] To overcome the above shortcomings, this utility model provides a vehicle door lock with an electric child lock function, aiming to improve the current market situation where electric child lock functions all require independent motors and transmission systems, which leads to increased costs for customers who want to add convenient functions.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a vehicle door lock with an electric child lock function, including a lock tongue controlled by an unlocking system disposed on a housing and disposed thereon, wherein the housing is provided with:

[0006] The internal unlocking lever reset signal switch is triggered by being pressed.

[0007] A position signal switch, which is triggered by pressure.

[0008] The motor drive system, by pressing the internal unlocking lever reset signal switch or position signal switch, records whether the motor drive system is in position one or position two through the vehicle controller. When the motor drive system is in position one, the door lock is in the unlocking stage; when the motor drive system is in position two, the door lock is in the locking stage.

[0009] The inner opening unlocking lever rotates on the housing. When the motor drive system is in position one, the inner opening unlocking lever engages with the unlocking system, and the lock tongue is opened as the inner opening unlocking lever rotates. When the motor drive system is in position two, the inner opening unlocking lever is misaligned with the unlocking system, and the lock tongue cannot be opened as the inner opening unlocking lever rotates.

[0010] Preferably, the unlocking system includes an electric unlocking lever, a pawl release lever, and a pawl.

[0011] Preferably, the motor drive system includes:

[0012] The motor is energized by the door lock's electrical component EKT;

[0013] The worm gear transmission system consists of a worm and a sector gear. The sector gear is connected to the housing, the worm is braked by the motor, and the worm and the sector gear mesh.

[0014] The transmission rod can slide along its length in the groove of the housing, and one end is connected to the sector gear. It is provided with a characteristic arc groove, a characteristic shaft and an arc surface feature. The arc surface feature triggers a position signal switch.

[0015] The safety lever rotates on the housing and has a U-shaped arc groove that matches the feature shaft, causing the transmission lever to slide and brake the rotation of the safety lever, or the safety lever to rotate and brake the sliding of the transmission lever.

[0016] The safety lever is fixed to the safety pull rod and has a safety lever curved surface.

[0017] A safety transition lever, fixed to an electric unlocking lever, has a safety transition lever limiting protrusion and a safety transition lever characteristic shaft. The inner unlocking pull rod on the safety transition lever characteristic shaft has an inner unlocking pull rod engaging protrusion that mates with the safety transition lever limiting protrusion. When the safety transition lever characteristic shaft engages with the inner unlocking pull rod engaging protrusion, the inner unlocking pull rod rotates, driving the safety transition lever to rotate. When the safety transition lever characteristic shaft and the inner unlocking pull rod engaging protrusion are misaligned, the rotation of the inner unlocking pull rod cannot drive the safety transition lever to rotate. The curved surface of the safety swing lever limits the rotation of the safety transition lever by restricting the movement of the safety transition lever characteristic shaft.

[0018] Preferably, the outer wall of the safety transition rod is provided with a return spring, the two ends of which are respectively connected to the outer wall of the safety transition rod and the electric unlocking rod.

[0019] Preferably, the inner unlocking lever is provided with a hole that can be pulled.

[0020] Preferably, one end of the inner opening / unlocking lever is provided with an inner opening / unlocking lever arc, and the safety lever is provided with a feature surface that abuts against and brakes the inner opening / unlocking lever arc.

[0021] Preferably, the vehicle door lock further includes:

[0022] The reset signal trigger rod slides along its length in the groove of the cover plate. One end of the rod has an irregular arc groove. The inner opening and unlocking lever is provided with an inner opening and unlocking lever drive shaft. The inner opening and unlocking lever drive shaft slides in the irregular arc groove and drives the reset signal trigger rod to slide. The other end of the reset signal trigger rod is provided with a reset signal trigger rod arc surface, which is used to trigger the inner opening and unlocking lever reset signal switch.

[0023] Preferably, the inner unlocking lever is fitted with an inner unlocking lever spring around its rotation axis for resetting after the inner unlocking lever rotates.

[0024] Preferably, the inner unlocking lever is provided with a retaining flange protrusion to limit the rotational movement of the safety transition lever under the action of the return spring.

[0025] Preferably, the sector gear is provided with a drive shaft, which cooperates with the characteristic arc groove to drive the transmission rod to slide.

[0026] The beneficial effects of this utility model are:

[0027] After the device is locked, the position of the motor drive system is determined. When it is in position one, the motor drive system switches directly to position two. When it is in position two, the lock tongue cannot be opened by the inner unlocking lever. At the same time, during the pulling of the inner unlocking lever, the signal of the motor drive system jumps twice. The vehicle control logic drives the motor drive system to move to position one and then switch to position two.

[0028] After unlocking, when the motor drive system is in position one, the inner unlocking lever is pulled to open the lock tongue; when the motor drive system is in position two, the inner unlocking lever is pulled once to switch from position two to position one, and then the inner unlocking lever is pulled again to open the lock tongue.

[0029] This invention achieves the electric child lock function using a single motor drive system, further reducing the need for independent motors and drive systems. It integrates the system using an alternative drive structure, thus reducing costs compared to existing technologies that require additional motors and drive systems. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a diagram showing the overall structure of the motor drive system at position one.

[0032] Figure 2 This is a diagram of the internal structure of the motor drive system at position one.

[0033] Figure 3 This is a front view of the overall structure of the motor drive system in position two.

[0034] Figure 4 This is a reverse structural view of the motor drive system in position two.

[0035] Figure 5 Internal structure diagram of the inner unlock lever in position three when the child lock is engaged;

[0036] Figure 6 When locking the child lock, pull the inner unlock lever to position five (internal structure diagram);

[0037] Figure 7 When the child lock is engaged, pull the inner unlock lever to position five to see the connection structure between the inner unlock lever and the safety transition lever.

[0038] Figure 8 When the child lock is engaged, the internal unlocking lever returns to position four (internal structure diagram);

[0039] Figure 9 When the child lock is engaged, the inner unlocking lever returns to position four. (Diagram showing the connection structure between the inner unlocking lever and the safety transition lever.)

[0040] Figure 10 Logic diagram for electric child lock;

[0041] Figure 11 This is a timing diagram showing the position of the internal unlocking lever and the corresponding signals.

[0042] In the diagram: 10. Housing; 100. Pull cord; 110. Safety transition rod; 110a. Safety transition rod limiting protrusion; 110b. Safety transition rod characteristic shaft; 120. Electric unlocking rod; 130. Transmission rod; 130a. Characteristic arc groove; 130b. Characteristic shaft; 130c. Arc surface feature; 140. Lock tongue; 150. Pawl release rod; 160. Pawl; 170. Return spring; 180. Third shaft; 190. Inward opening unlocking rod spring; 200. Cover plate; 20. Door lock electrical component EKT; 20a. Inward opening unlocking rod spring. 20b, Position signal switch; 30, Motor; 40, Worm gear; 50, Sector gear; 50a, Drive shaft; 60, Reset signal trigger rod; 60a, Irregular arc groove; 60b, Arc surface of reset signal trigger rod; 70, Inner opening unlocking rod; 70a, Engaging protrusion of inner opening unlocking rod; 70b, Drive shaft of inner opening unlocking rod; 70c, Arc of inner opening unlocking rod; 70d, Flange protrusion; 80, Safety rod; 80a, U-shaped arc groove; 80b, Feature surface; 90, Safety rocker arm; 90a, Curved surface of safety rocker arm. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0044] Example

[0045] First, in the prior art, the latch 140 of the car door lock is controlled by the unlocking system. In some embodiments, the unlocking system is a conventional means, specifically including an electric unlocking lever 120, a pawl release lever 150, and a pawl 160. That is, by rotating the electric unlocking lever 120, the latch 140 is braked to rotate through the cooperation of the pawl release lever 150 and the pawl 160. When the latch 140 rotates, the car door lock is unlocked.

[0046] Based on the working process of the latch 140 of the car door lock, this invention improves the implementation method of the electric child lock function. Specifically, the driving method of driving the electric unlocking lever 120 in the locking and unlocking stages is improved. The improvement is explained from the perspective of the locking and unlocking working logic. A schematic diagram illustrating the working logic can be found here. Figure 10 It is divided into the whole vehicle child lock locking logic and the whole vehicle child lock unlocking logic.

[0047] First, when the child locks are engaged, their operating logic is as follows:

[0048] After receiving the child lock locking command, the vehicle control logic first determines the position status of the door lock's motor drive system. Further, it checks the signal status of position signal switch 20b and the inner unlocking lever reset signal switch 20a to confirm whether the motor drive system is in position one or position two. When the motor drive system is determined to be in position one... Figure 1 and Figure 2 As shown, the vehicle controller is connected to the door lock electrical device EKT20 via the vehicle wiring harness to provide positive power to the motor 30. The motor 30 drives the worm gear 40, which in turn drives the sector gear 50 (the sector gear 50 is connected to the housing 10 and rotates around the first axis), thus forming a worm gear transmission system with the worm.

[0049] Based on the worm gear transmission system, it drives the transmission rod 130 in Figure 2 The direction shown moves to the left (achieved through the linkage of the drive shaft 50a on the sector gear 50 and the characteristic arc groove 130a on the transmission rod 130), and the transmission rod 130 drives the safety rod 80 to rotate clockwise around the second axis (the second axis is a feature of the housing 10, according to...). Figure 4 The characteristic shaft 130b on the transmission rod 130 and the characteristic U-shaped arc groove 80a on the safety rod 80 are linked together. The safety rod 80 drives the safety swing rod 90 to rotate. At the same time, when the transmission rod 130 moves, its arc surface feature 130c will press the trigger position signal switch 20b. The signal jump is fed back to the vehicle controller. The controller records the motor transmission system in position two. The vehicle child lock locking logic control and door lock complete the child lock locking operation.

[0050] With the child lock engaged, such Figure 5 As shown, the inner opening and unlocking lever drive shaft 70b on the inner opening and unlocking lever 70 and the irregular arc groove 60a on the reset signal trigger lever 60 are connected at the bottom of the groove. The inner opening and unlocking lever reset signal switch 20a is in an uncompressed state, and the reset signal is not triggered.

[0051] With the child lock engaged, such Figure 3 As shown, the safety lever 90 is provided with a safety lever curved surface 90a, and the safety transition lever 110 is provided with a safety transition lever characteristic axis 110b, which is constrained by the safety lever curved surface 90a. Figure 3 The position shown prevents the safety over-bar limit protrusion 110a from engaging with the inner unlocking lever engagement protrusion 70a.

[0052] In addition, when the inner opening unlocking lever 70 is pulled, it is divided into three positions: position three, position four and position five. Position three is the initial position of the inner opening unlocking lever 70, position four is the position where the inner opening unlocking lever 70 triggers the position signal switch 20b, and position five is the final position of the inner opening unlocking lever 70. That is, position four is located between position three and position five.

[0053] When the inner opening unlocking lever 70 starts to rotate around the third axis 180 from position three, it cannot drive the safety transition lever 110 to work (because the safety transition lever limiting protrusion 110a cannot engage with the inner opening unlocking lever engagement protrusion 70a), and thus cannot drive the unlocking system composed of the electric unlocking lever 120, the pawl release lever 150 and the pawl 160, that is, it cannot open the bolt 140.

[0054] When the vehicle is in the child lock position, as the inner unlocking lever 70 is pulled, the reset signal trigger lever 60 can slide along its length within the groove of the cover plate 200. The cover plate 200 is existing technology. The reset signal lever 60 will slide to the right (based on the linkage relationship between the irregular arc groove 60a and the inner unlocking lever drive shaft 70b, see reference). Figure 8 ).

[0055] When the inner unlocking lever 70 is pulled to position four, refer to Figure 8 and Figure 9 The reset signal trigger rod arc surface 60b triggers the reset signal switch 20a, causing the reset signal to change; at the same time, during the pulling process of the inner opening and unlocking lever 70, the safety lever 80 is pushed to rotate counterclockwise (based on the inner opening and unlocking lever arc 70c of the inner opening and unlocking lever 70 driving the feature surface 80b on the safety lever 80).

[0056] When the safety lever 80 is turned counterclockwise:

[0057] On one hand, it pushes the transmission rod 130 to slide to the right (e.g. Figure 6 As shown, the basis for the matching is: Figure 4 The feature shaft 130b and the U-shaped arc groove 80a shown in the figure are linked to move the motor transmission system to position one. At the same time, the arc surface feature 130c compresses the position signal switch 20b, which triggers the position signal of the motor transmission system and causes a signal jump.

[0058] On the other hand, the safety lever 80 drives the safety rocker arm 90 to rotate counterclockwise, and the safety rocker arm 90 removes the position restriction on the safety transition lever 110 (according to...). Figure 3 The interaction between the curved surface 90a of the safety lever and the characteristic axis 110b of the safety transition lever.

[0059] Among them, the safety transition rod 110 rotates counterclockwise under the action of the return spring 170, and during the return rotation, it is limited by the stop flange protrusion 70d on the inner opening unlocking lever 70 (e.g. Figure 7 (As shown).

[0060] When the inner unlocking lever 70 is pulled to position five, it begins to rotate clockwise to reset under the action of the inner unlocking lever spring 190. Figure 8 and 9 As shown, during the reset process of the inner unlock lever 70, the reset signal trigger lever 60 will be driven to slide to the left (e.g., Figure 8 As shown in the figure, the motion process is based on the linkage between the irregular arc groove 60a and the inner opening and unlocking lever drive shaft 70b. When the reset signal trigger rod 60 slides to the left, the arc surface 60b of the reset signal trigger rod will no longer compress the inner opening and unlocking lever reset signal switch 20a, and the reset signal will change again.

[0061] Based on the above movement process, after the vehicle controller receives the position signal switch 20b and changes its position twice, it determines the position signal of the motor drive system and drives the motor drive system to position one. The vehicle controller then supplies positive power to the motor 30 according to the logic settings, and the motor drive system moves from position one to position two.

[0062] It should be noted that a key point during the process of the motor 30 being powered on by the vehicle controller is that the inner opening safety transition rod 110 is still restricted by the flange protrusion 70d, and there is still a restricted distance, so that during the operation of the motor 30, the safety transition rod limiting protrusion 110a and the inner opening unlocking lever engagement protrusion 70a remain in a state of non-engagement.

[0063] When the child locks are engaged, pulling the inner unlock lever 70 will cause the system to repeatedly describe the actions described above, including the inner unlock lever 70 moving from position three to position five, the motor drive system moving to position one, the inner unlock lever 70 moving to position four, and the reset signal transition (see reference). Figure 10 This keeps the motor drive system in position two, meaning the door cannot be opened by pulling the inner unlocking lever 70.

[0064] Secondly, when the vehicle's child lock receives a child lock unlock command, its working logic is as follows:

[0065] The vehicle control logic first determines the signal status of the motor drive system position signal switch 20b in the door lock, that is, confirms that the motor drive system is in position one or position two. If it is in position one, the inner unlocking lever 70 is pulled, which drives the unlocking system associated parts and opens the lock tongue 140, thus opening the door.

[0066] When the motor drive system is confirmed to be in position two, the vehicle controller, via the vehicle wiring harness, connects to the door lock electrical component EKT20 to provide reverse power to the motor 30, driving the motor drive system from position two to position one. In some embodiments, optionally, the motor drive system can also be driven from position two to position one by pulling the inner unlocking lever 70.

[0067] Finally, please refer to the relative timing relationship between the inner unlocking lever position 70, the inner unlocking lever reset signal switch 20a, and the motor drive system signals. Figure 11 .

[0068] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Various modifications can be made to the present invention by those skilled in the art.

[0070] And changes. Any modifications or equivalents made within the spirit and principles of this utility model are not permitted.

[0071] Replacements, improvements, etc., should all be included within the protection scope of this utility model.

Claims

1. A vehicle door lock with an electric child lock function, comprising a bolt (140) controlled by an unlocking system disposed on a housing (10), characterized in that, The housing (10) is provided with: The internal unlocking lever reset signal switch (20a) is triggered by being pressed. The position signal switch (20b) is triggered by pressure; The motor drive system presses against the internal unlocking lever reset signal switch (20a) or position signal switch (20b), and the vehicle controller records whether the motor drive system is in position one or position two. When the motor drive system is in position one, the door lock is in the unlocking stage; when the motor drive system is in position two, the door lock is in the locking stage. The inner opening unlocking lever (70) rotates on the housing (10). When the motor drive system is in position one, the inner opening unlocking lever (70) engages with the unlocking system and opens the lock tongue (140) as the inner opening unlocking lever (70) rotates. When the motor drive system is in position two, the inner opening unlocking lever (70) is misaligned with the unlocking system and cannot open the lock tongue (140) as the inner opening unlocking lever (70) rotates.

2. A motor vehicle door lock with an electric child lock function according to claim 1, characterized in that, The unlocking system includes an electric unlocking lever (120), a pawl release lever (150), and a pawl (160).

3. A motor vehicle door lock with an electric child lock function according to claim 2, characterized in that, The motor drive system includes: The motor (30) is powered by the door lock electrical component EKT (20); The worm gear transmission system consists of a worm (40) and a sector gear (50). The sector gear (50) is connected to the housing (10). The worm (40) is braked by the motor (30), and the worm (40) and the sector gear (50) mesh. The transmission rod (130) can slide along its length in the groove of the housing (10), and one end is connected to the sector gear (50). It is provided with a characteristic arc groove (130a), a characteristic shaft (130b) and an arc surface feature (130c). The arc surface feature (130c) triggers the position signal switch (20b). The safety lever (80) rotates on the housing (10) and has a U-shaped arc groove (80a) that matches the feature shaft (130b), causing the transmission lever (130) to slide and brake the safety lever (80) to rotate, or the safety lever (80) to rotate and brake the transmission lever (130) to slide. A safety lever (90) is fixed to a safety pull rod (80), and a safety lever curved surface (90a) is provided on it; A safety transition rod (110) is fixed on an electric unlocking rod (120). It has a safety transition rod limiting protrusion (110a) and a safety transition rod characteristic shaft (110b). The inner unlocking pull rod (70) has an inner unlocking pull rod engaging protrusion (70a) that cooperates with the safety transition rod limiting protrusion (110a). When the safety transition rod limiting protrusion (110a) engages with the inner unlocking pull rod engaging protrusion (70a), the inner unlocking pull rod (70) rotates to drive the safety transition rod (110) to rotate. When the safety transition rod limiting protrusion (110a) and the inner unlocking pull rod engaging protrusion (70a) are misaligned, the inner unlocking pull rod (70) cannot drive the safety transition rod (110) to rotate. The safety swing rod curved surface (90a) limits the rotation of the safety transition rod (110) by restricting the movement of the safety transition rod characteristic shaft (110b).

4. A motor vehicle door lock with an electric child lock function according to claim 3, characterized in that, The outer wall of the safety transition rod (110) is provided with a return spring (170), the two ends of which are connected to the outer wall of the safety transition rod (110) and the electric unlocking rod (120) respectively.

5. A motor vehicle door lock with an electric child lock function according to claim 1, characterized in that, The inner unlocking lever (70) is provided with a pull hole, which is braked by a pull rope (100).

6. A motor vehicle door lock with an electric child lock function according to claim 3, characterized in that, The inner opening and unlocking lever (70) has an inner opening and unlocking lever arc (70c) at one end, and the safety lever (80) has a feature surface (80b) that abuts against the inner opening and unlocking lever arc (70c) for braking.

7. A motor vehicle door lock with an electric child lock function according to claim 1, characterized in that, The vehicle door lock also includes: A reset signal trigger rod (60) slides along its length in the groove of the cover plate. One end of the rod is provided with a shaped arc groove (60a). The inner opening and unlocking lever (70) is provided with an inner opening and unlocking lever drive shaft (70b). The inner opening and unlocking lever drive shaft (70b) slides in the shaped arc groove (60a) and drives the reset signal trigger rod (60) to slide. The other end of the reset signal trigger rod (60) is provided with a reset signal trigger rod arc surface (60b) for triggering the inner opening and unlocking lever reset signal switch (20a).

8. A motor vehicle door lock with an electric child lock function according to claim 7, characterized in that, The inner unlocking lever (70) is fitted with an inner unlocking lever spring (190) around its rotation axis for resetting after the inner unlocking lever (70) rotates.

9. A motor vehicle door lock with an electric child lock function according to claim 4, characterized in that, The inner unlocking lever (70) is provided with a retaining flange protrusion (70d) to limit the rotational movement of the safety transition lever (110) under the action of the return spring (170).

10. A motor vehicle door lock with an electric child lock function according to claim 3, characterized in that, The sector gear (50) is provided with a drive shaft (50a), which, in conjunction with the feature arc groove (130a), drives the transmission rod (130) to slide.

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