Self-suction lock catch of automobile door

Abstract

A self-suction lock catch for an automobile door belongs to the technical field of automobile door locks and comprises a first base and a second base, a suction cylinder is attached to one end face, facing the first base, of the second base, a driving motor is fixedly mounted on one end face, away from the first base, of the second base, and an induction cylinder is fixedly connected to one end face, facing the second base, of the first base. When a vehicle door is closed, the system is matched with a pressure sensor through a trigger rod, a drive motor controls a suction cylinder to rotate, automatic tensioning of the vehicle door from half locking to full locking is achieved through a sliding column and a guide groove, an original vehicle lock structure does not need to be changed, it is ensured that the design is easy to use, meanwhile, a buffer rod cooperates with a flow limiting hole, and positioning buffering is conducted through hydraulic oil flow adjustment; and in addition, due to the design of the guide groove and the separation groove, automatic unlocking can be achieved, additional operation is not needed for opening the door, the use convenience is greatly improved, and the equipment reliability is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of automobile door locks, and in particular to a self-closing lock buckle for an automobile door. Background Art

[0002] Car door locks are an important part of the car body. They are special parts that integrate safety, decoration and craftsmanship. With the development of the automobile industry, the functions and types of car door locks are becoming more and more diverse. Passengers have more and more knowledge about cars and have higher and higher requirements for car comfort. Among them, for car doors, humanized opening and closing has received more and more attention from customers and vehicle companies.

[0003] At present, when a traditional side door lock is used to close the door, after the ratchet rotates to a certain angle, the pawl will jam the ratchet due to the action of the spring to achieve the locking effect. This process depends on the occupant's door closing force. If the force is not enough, the door cannot be completely locked. The occupant needs to close the door again until the door is completely locked. In order to make the use of the car more convenient and quick, electric suction door locks have gradually appeared on the market to replace traditional mechanical door locks. This lock can realize that after the door is manually closed and enters a semi-locked state, the door lock equipped with the door will automatically close and put the door into a fully locked state, so that the user can close the door without exerting force.

[0004] Existing car door locks with self-closing function, some side door locks achieve the closing function through the relative movement of the lock plate, and some achieve closing through a closing link connected to an actuator mechanism. However, changing a traditional car door mechanical lock to a self-closing lock usually requires changing the structure inside the original car lock, which increases the structural complexity and even requires replacing a new lock, greatly increasing the cost of use and maintenance. In addition, during the process of closing the car door, the noise generated by the collision of the door slamming hard causes discomfort to people and affects its service life. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the conversion of a traditional mechanical door lock into a self-priming lock in the prior art usually requires changing the structure inside the original car lock, thereby increasing the complexity of the structure, and to propose a self-priming lock buckle for a car door.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A self-closing lock for a car door, comprising a base 1 and a base 2, wherein an end surface of the base 2 facing the base 1 is provided with a closing cylinder, an end surface of the base 2 away from the base 1 is fixedly provided with a driving motor, and an end surface of the base 1 facing the base 2 is fixedly connected with a sensing cylinder; An end surface of the base is provided with a suction component, so that when the door is closed, the door can be tightened from a semi-locked state to a fully locked state without changing the structure of the original car lock; The induction cylinder is provided with a buffer positioning component inside, so as to buffer and position the closed door when the door is closed, and reduce the impact and noise when the door is closed.

[0007] Further, the suction component includes a fixing rod, and the two fixing rods are symmetrically fixedly connected to an end face of the base one facing the base two, and a movable groove is penetrated inside the end of the fixing rod away from the base one, and the inner wall of the movable groove is slidably connected with a sliding column, and the ends of the two sliding columns away from each other are fixedly connected with a connecting block, and the outer wall of the sliding column is fitted with a tension spring, one end of the tension spring is fixedly connected to the outer wall of the side away from the two fixing rods, and the other end of the tension spring is fixedly connected to an end face of the two connecting blocks close to each other.

[0008] Furthermore, a guide groove is symmetrically provided on the outer wall of the suction cylinder corresponding to the sliding column, and the sliding column forms a telescopic structure with a connecting block through a tension spring. The end portions of the two sliding columns that are close to each other are squeezed and arranged on the inner wall of the guide groove by a tension spring. A separation groove is symmetrically provided on one end surface of the suction cylinder facing the base, and the inner wall of the separation groove is connected to the inner wall of the guide groove.

[0009] Furthermore, an auxiliary ring is symmetrically fixedly connected to one end of the suction cylinder facing the base one corresponding to the sliding column, and the end of the auxiliary ring facing the base one is inclined, and a driving rod is fixedly connected to the output shaft at one end of the driving motor, and the outer wall of the driving rod is fixedly connected to the interior of the suction cylinder.

[0010] Furthermore, a circular groove is provided at the center of one end face of the sensing tube facing the base 2, and a pressure sensor is fixedly installed on the inner wall of the circular groove, a spring 1 is fixedly connected to one end face of the pressure sensor, and a trigger rod is fixedly connected to the other end of the spring 1, the outer wall of the trigger rod slides in contact with the inner wall of the circular groove, and the pressure sensor is electrically connected to the drive motor.

[0011] Further, the buffer positioning component includes a slide groove, four of which are equidistantly arranged inside the sensing cylinder, and the inner wall of the slide groove is slidably connected with a buffer rod, and the end of the buffer rod facing the suction cylinder is fixedly connected with a rubber pad, a storage groove is arranged inside the sensing cylinder corresponding to the slide groove, and a limiting flow hole is arranged on the inner wall of the slide groove, the slide groove is connected with the storage groove through the limiting flow hole, and the inner wall aperture of the limiting flow hole is smaller than the inner wall aperture of the slide groove, and the inner wall of the slide groove is symmetrically provided with limiting grooves, and the outer wall of the buffer rod away from the rubber pad is symmetrically fixedly connected with a limiting block, and the outer wall of the limiting block slides in close contact with the inner wall of the limiting groove.

[0012] Furthermore, the inner wall of the storage slot is fixedly connected to spring 2, and the other end of spring 2 is fixedly connected to a push disk corresponding to the flow limiting hole, the outer wall of the push disk slides in contact with the inner wall of the storage slot, and the push disk forms a telescopic structure with the storage slot through spring 2.

[0013] Furthermore, mounting blocks are symmetrically fixedly mounted on the outer walls of the base 1 and the base 2.

[0014] Compared with the prior art, the above solution has the following beneficial effects: 1. When closing the car door, the driving motor can control the suction cylinder to rotate through the cooperation of the trigger rod and the pressure sensor, so that the car door can be tightened through the cooperation of the slide column and the guide groove, so that the car door can be fully locked from a semi-locked state, without changing the structure in the original car lock. The structure is simple, ensuring the compatibility and ease of use of the design, and through the cooperation of the guide groove and the separation groove, the suction component can automatically enter the unlocked state after the car door is tightened. When opening the car door, no additional unlocking operation is required, which greatly improves the convenience of use.

[0015] 2. When closing the car door, the buffer rod and the flow limiting hole can be used to coordinate and utilize the flow regulation and energy conversion of the hydraulic oil to position and buffer the closed car door, which can effectively reduce the impact and noise when the car door is closed, so that the car door can be stably stopped in the semi-locked position without affecting the tightening and adsorption of the suction component on the car door, thereby improving the reliability of the device when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a self-closing lock for a car door proposed by the present invention; Figure 2 A three-dimensional structural schematic diagram of a self-closing lock buckle for a vehicle door in a closed state proposed by the present invention; Figure 3 This is a three-dimensional structural schematic diagram of the parts of a self-closing lock for a car door provided by the present invention, which are installed on the base 2; Figure 4 This is a three-dimensional structural schematic diagram of the parts of a self-closing lock for a car door provided by the present invention, which are installed on a base 1; Figure 5 A schematic diagram of the three-dimensional structure of a suction component of a self-closing lock for a vehicle door proposed by the present invention; Figure 6 The present invention is a schematic three-dimensional structural diagram of a buffer positioning component of a self-closing lock for a vehicle door. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top surface", "bottom surface", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish an entity or operation from another entity or operation, and do not require or imply any actual relationship, order or relative importance between these entities or operations.

[0019] Example 1, reference Figure 1-6 A self-closing lock for a car door comprises a base 1 and a base 2. An end surface of the base 2 2 facing the base 1 is provided with a suction cylinder 3, an end surface of the base 2 2 away from the base 1 is fixedly provided with a driving motor 4, and an end surface of the base 1 facing the base 2 2 is fixedly connected with an induction cylinder 5; An attraction component 6 is provided on one end face of the base 1, and the attraction component 6 includes a fixing rod 601, two fixing rods 601 are symmetrically fixedly connected to one end face of the base 1 facing the base 2 2, and a movable groove 602 is penetrated inside the end of the fixing rod 601 away from the base 1, and a sliding column 603 is slidably connected to the inner wall of the movable groove 602, and a connecting block 604 is fixedly connected to the end of the two sliding columns 603 away from each other, and a tension spring 605 is fitted on the outer wall of the sliding column 603, and one end of the tension spring 605 is fixedly connected to the outer wall of the side away from the two fixing rods 601, and the other end of the tension spring 605 is fixedly connected to the end face of the two connecting blocks 604 close to each other; In this embodiment, first, in this device, the base 1 is fixedly mounted on the vehicle door through the mounting block 16, and the base 2 is fixedly mounted on the corresponding position of the vehicle body through the mounting block 16, so that when the vehicle door is closed, the base 1 can move to the position of the base 2 2; Then, when the door is closed, two fixing rods 601 are symmetrically fixedly connected to one end surface of the base 1 facing the base 2 2, and a movable groove 602 is penetrated inside the end of the fixing rod 601 away from the base 1, and a sliding column 603 is slidably connected to the inner wall of the movable groove 602, so that the two sliding columns 603 can be synchronously driven to move to the position of the suction cylinder 3; Then, during the door closing process, the auxiliary ring 10 is symmetrically fixedly connected to the slide column 603 corresponding to one end surface of the suction cylinder 3 facing the base 1, and the end surface of the auxiliary ring 10 facing the base 1 is in the shape of an inclined surface, and the slide column 603 forms a telescopic structure with the connecting block 604 through the tension spring 605, so that when the door is about to be initially closed, the ends of the two slide columns 603 will be in advance in contact with the inclined surface of the auxiliary ring 10, so that the two slide columns 603 are contracted and continue to move. When the door is initially closed and enters a semi-locked state, at this time, the outer wall of the suction cylinder 3 is symmetrically provided with a guide groove 8 corresponding to the slide column 603, and the end portions of the two slide columns 603 that are close to each other are squeezed and set on the inner wall of the guide groove 8 by the tension spring 605, so that the end portions of the two slide columns 603 that are close to each other are located at the initial position of the guide groove 8; Then, at this time, the output shaft at one end of the driving motor 4 is fixedly connected with the driving rod 11, and the outer wall of the driving rod 11 is fixedly connected to the inside of the suction cylinder 3, and the sensing cylinder 5 is provided with a circular groove 12 at the center of one end face of the base 2, and a pressure sensor 13 is fixedly installed on the inner wall of the circular groove 12, and a spring 14 is fixedly connected to one end face of the pressure sensor 13, and a trigger rod 15 is fixedly connected to the other end of the spring 14, and the outer wall of the trigger rod 15 is fitted and slid with the inner wall of the circular groove 12, so that the sliding column 603 is just located When the guide groove 8 is in the initial position, the trigger rod 15 will abut against the inner wall of the suction cylinder 3 and shrink a certain distance, so that the spring 14 can be used to squeeze the pressure sensor 13, so that the pressure sensor 13 sends a signal to the drive motor 4, and then the drive motor 4 can drive the drive rod 11 to rotate, so as to drive the suction cylinder 3 to rotate, so that the two slide posts 603 slide on the inner wall of the guide groove 8 to tighten the door, so that the door is fully locked from the semi-locked state, without changing the structure of the original car lock, and the structure is simple; Then, a separation groove 9 is symmetrically opened on one end surface of the suction cylinder 3 toward the base 1, and the inner wall of the separation groove 9 is connected with the inner wall of the guide groove 8, so that under the guidance of the guide groove 8, when the slide post 603 slides to the final position of the guide groove 8, the door will enter the fully locked state by its own car lock, and the slide post 603 will slide into the separation groove 9 along with the guide groove 8, so that when the door needs to be opened, the original car lock unlocking wrench on the inside of the door can be directly pulled to open the door, and the slide post 603 will be able to slide out of the separation groove 9, so that after the door is tightened, the suction component 6 can be automatically put into the unlocked state, and no additional unlocking operation is required when opening the door, which greatly improves the convenience of use; Then, after the door is opened, the trigger rod 15 is no longer squeezed by the suction cylinder 3, so that the pressure sensor 13 returns to a normal pressure value, thereby reversing and resetting the suction cylinder 3, waiting for the next door closing; As described above, when the vehicle door is closed, the driving motor 4 can control the suction cylinder 3 to rotate through the cooperation of the trigger rod 15 and the pressure sensor 13, so that the vehicle door can be tightened through the cooperation of the slide column 603 and the guide groove 8, so that the vehicle door can be changed from a semi-locked state to a fully locked state. There is no need to change the structure in the original vehicle lock. The structure is simple, which ensures the compatibility and ease of use of the design. Through the cooperation of the guide groove 8 and the separation groove 9, after the vehicle door is tightened, the suction component 6 can be automatically put into an unlocked state. When opening the vehicle door, there is no need to perform additional unlocking operations, which greatly improves the convenience of use.

[0020] In Embodiment 2, a buffer positioning component 7 is provided inside the sensing tube 5. The buffer positioning component 7 includes a slide groove 701. Four slide grooves 701 are equidistantly arranged inside the sensing tube 5. A buffer rod 702 is slidably connected to the inner wall of the slide groove 701. A rubber pad 703 is fixedly connected to one end of the buffer rod 702 facing the suction tube 3. A storage groove 704 is provided inside the sensing tube 5 corresponding to the slide groove 701. A flow limiting hole 705 is provided on the inner wall of the slide groove 701. The slide groove 701 is connected to the storage groove 704 through the flow limiting hole 705. The inner wall of the flow limiting hole 705 has a smaller aperture than that of the inner wall of the slide groove 701. A limiting groove 706 is symmetrically provided on the inner wall of the slide groove 701. A limiting block 707 is symmetrically fixedly connected to the outer wall of the buffer rod 702 at one end away from the rubber pad 703. The outer wall of the limiting block 707 slides in contact with the inner wall of the limiting groove 706. In this embodiment, when the slide column 603 is located at the initial position of the guide groove 8, the buffer rod 702 is slidably connected to the inner wall of the slide groove 701, and the end of the buffer rod 702 facing the suction cylinder 3 is fixedly connected to the rubber pad 703, so that the buffer rod 702 is synchronously fitted with the inner wall of the suction cylinder 3 through the rubber pad 703. At this time, when the car door continues to move, a storage groove 704 is opened in the corresponding slide groove 701 through the inside of the sensing cylinder 5, and a limiting flow hole 705 is opened on the inner wall of the slide groove 701, and the slide groove 701 is connected to the storage groove 704 through the limiting flow hole 705, and the inner wall of the limiting flow hole 705 The aperture is smaller than the inner wall aperture of the slide groove 701, so that the hydraulic oil in the slide groove 701 can be squeezed by the buffer rod 702. At this time, since the inner wall aperture of the flow limiting hole 705 is smaller than the inner wall aperture of the slide groove 701, the flow limiting hole 705 can be used to limit the flow rate of the hydraulic oil, thereby generating a damping effect, which can effectively reduce the impact and noise when the door is closed, so that the door can be stably stopped at the semi-locked position, and when the door is subsequently sucked, the tightening rate of the door will not produce a large damping effect, and thus will not affect the tightening adsorption of the suction component 6 on the door, thereby improving the reliability of the device when in use; Then, when the door is opened, a limiting groove 706 is symmetrically formed on the inner wall of the slide groove 701, and the outer wall of the end of the buffer rod 702 away from the rubber pad 703 is symmetrically fixedly connected to the limiting block 707, and the outer wall of the limiting block 707 slides in contact with the inner wall of the limiting groove 706, and at the same time, the inner wall of the storage groove 704 is fixedly connected to the spring 2 708, and the other end of the spring 2 708 is fixedly connected to the push disk 709 corresponding to the flow limiting hole 705, and the outer wall of the push disk 709 is in contact with the flow limiting hole 705. The inner wall of the storage groove 704 slides in contact with each other, and the push plate 709 forms a telescopic structure with the storage groove 704 through the second spring 708, so that the push plate 709 can be driven by the second spring 708 to push the hydraulic oil flowing into the storage groove 704 from the flow-limiting hole 705 back into the slide groove 701, and push the buffer rod 702 back to its original position, and use the cooperation of the limit block 707 and the limit groove 706 to prevent the buffer rod 702 from being separated from the slide groove 701, thereby completing the reset of the buffer positioning component 7; As described above, when closing the vehicle door, the closed vehicle door can be positioned and buffered by the cooperation of the buffer rod 702 and the flow limiting hole 705, utilizing the flow regulation and energy conversion of the hydraulic oil, which can effectively reduce the impact and noise when the vehicle door is closed, allowing the vehicle door to stop steadily in the semi-locked position without affecting the tightening and adsorption of the vehicle door by the suction component 6, thereby improving the reliability of the device when in use.

[0021] The working principle of the present invention is as follows: when the door is closed, two fixing rods 601 are symmetrically fixedly connected to one end surface of the base 1 facing the base 2, and a movable groove 602 is penetrated inside the end of the fixing rod 601 away from the base 1, and a sliding column 603 is slidably connected to the inner wall of the movable groove 602, so that the two sliding columns 603 can be synchronously driven to move to the position of the suction cylinder 3, and then the auxiliary ring 10 is symmetrically fixedly connected to the sliding column 603 through the end surface of the suction cylinder 3 facing the base 1, and the end surface of the auxiliary ring 10 facing the base 1 is inclined, and the sliding column 603 forms a telescopic structure with the connecting block 604 through the tension spring 605, so that when the door is about to be initially closed, the ends of the two sliding columns 603 will contact the inclined surface of the auxiliary ring 10 in advance, so that the two sliding columns 603 are contracted and continue to move, and when the door is initially closed and enters a semi-locked state, the close ends of the two sliding columns 603 are located at the initial position of the guide groove 8; Then, the outer wall of the trigger rod 15 and the inner wall of the circular groove 12 are fitted and slid together, so that when the slide column 603 is just located at the initial position of the guide groove 8, the trigger rod 15 will be against the inner wall of the suction cylinder 3 and shrink a certain distance, so that the pressure sensor 13 can be squeezed by the spring 14, so that the pressure sensor 13 sends a signal to the drive motor 4, and then the drive rod 11 can be driven by the drive motor 4 to rotate, so as to drive the suction cylinder 3 to rotate, so that the two slide columns 603 slide on the inner wall of the guide groove 8, so as to tighten the door, so that the door is fully locked from the semi-locked state; Then, a separation groove 9 is symmetrically opened on one end surface of the suction cylinder 3 toward the base 1, and the inner wall of the separation groove 9 is connected with the inner wall of the guide groove 8, so that under the guidance of the guide groove 8, when the slide column 603 slides to the final position of the guide groove 8, the door will enter the fully locked state by its own car lock, and the slide column 603 will slide into the separation groove 9 along with the guide groove 8, so that when the door needs to be opened, the original car lock unlocking wrench on the inside of the door can be directly pulled to open the door, and the slide column 603 will be able to slide out of the separation groove 9, so that after the door is tightened, the suction component 6 can automatically enter the unlocked state, and no additional unlocking operation is required when the door is opened; Then, when the slide column 603 is located at the initial position of the guide groove 8, when the door continues to move, a storage groove 704 is opened in the corresponding slide groove 701 through the inner part of the sensing cylinder 5, and a limiting flow hole 705 is opened on the inner wall of the slide groove 701, and the slide groove 701 is connected with the storage groove 704 through the limiting flow hole 705. At the same time, the inner wall diameter of the limiting flow hole 705 is smaller than the inner wall diameter of the slide groove 701, so that the hydraulic oil in the slide groove 701 can be squeezed through the buffer rod 702. Since the inner wall diameter of the flow-limiting hole 705 is smaller than the inner wall diameter of the slide groove 701, the flow-limiting hole 705 can be used to limit the flow rate of the hydraulic oil, thereby producing a damping effect, which can effectively reduce the impact and noise when the door is closed, so that the door can be stably stopped at the semi-locked position, and when the door is subsequently sucked, the tightening rate of the door will not produce a large damping effect, and will not affect the tightening adsorption of the suction component 6 on the door, thereby improving the reliability of the device when in use; Then, when the door is opened, a limiting groove 706 is symmetrically formed on the inner wall of the slide groove 701, and the outer wall of the end of the buffer rod 702 away from the rubber pad 703 is symmetrically fixedly connected to the limiting block 707, and the outer wall of the limiting block 707 slides in contact with the inner wall of the limiting groove 706, and at the same time, the inner wall of the storage groove 704 is fixedly connected to the spring 2 708, and the other end of the spring 2 708 is fixedly connected to the push disk 709 corresponding to the flow limiting hole 705, and the outer wall of the push disk 709 is in contact with the flow limiting hole 705. The inner walls of the storage groove 704 slide in close contact with each other, and at the same time, the pushing plate 709 forms a telescopic structure with the storage groove 704 through the spring 2 708, so that the pushing plate 709 can be driven by the spring 2 708 to push the hydraulic oil flowing into the storage groove 704 from the limiting hole 705 back into the slide groove 701, and push the buffer rod 702 back to its original position, and use the cooperation of the limit block 707 and the limit groove 706 to prevent the buffer rod 702 from detaching from the slide groove 701, thereby completing the resetting of the buffer positioning component 7.

[0022] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A self-closing lock for a car door, comprising a base 1 and a base 2, characterized in that: The end surface of the base 2 facing the base 1 is fitted with a suction cylinder, the end surface of the base 2 away from the base 1 is fixedly installed with a driving motor, and the end surface of the base 1 facing the base 2 is fixedly connected with an induction cylinder; An end surface of the base is provided with a suction component to tighten the door from a semi-locked state to a fully locked state when the door is closed; A buffer positioning component is arranged inside the induction cylinder to buffer and position the closed door and reduce the impact and noise when the door is closed.

2. The self-closing latch for a vehicle door according to claim 1, characterized in that: The suction component includes a fixing rod, the two fixing rods are symmetrically fixedly connected to an end face of the base one facing the base two, and a movable groove is penetrated inside the end of the fixing rod away from the base one, the inner wall of the movable groove is slidably connected with a sliding column, the ends of the two sliding columns away from each other are fixedly connected with a connecting block, and the outer wall of the sliding column is fitted with a tension spring, one end of the tension spring is fixedly connected to the outer wall of the side away from the two fixing rods, and the other end of the tension spring is fixedly connected to an end face of the two connecting blocks close to each other.

3. The self-closing latch for a vehicle door according to claim 2, characterized in that: The outer wall of the suction cylinder is symmetrically provided with guide grooves corresponding to the sliding column. The sliding column and the connecting block form a telescopic structure through a tension spring. The end portions of the two sliding columns that are close to each other are squeezed and arranged on the inner wall of the guide groove by the tension spring. The end surface of the suction cylinder facing the base is symmetrically provided with a separation groove, and the inner wall of the separation groove is connected with the inner wall of the guide groove.

4. The self-closing latch for a vehicle door according to claim 3, characterized in that: An auxiliary ring is symmetrically fixedly connected to one end of the suction cylinder facing the base one and corresponds to the sliding column, and the end of the auxiliary ring facing the base one is inclined, and a driving rod is fixedly connected to the output shaft at one end of the driving motor, and the outer wall of the driving rod is fixedly connected to the interior of the suction cylinder.

5. The self-closing latch for a vehicle door according to claim 4, characterized in that: A circular groove is provided at the center of one end face of the sensing tube facing the base 2, and a pressure sensor is fixedly installed on the inner wall of the circular groove, a spring 1 is fixedly connected to one end face of the pressure sensor, and a trigger rod is fixedly connected to the other end of the spring 1, the outer wall of the trigger rod fits and slides with the inner wall of the circular groove, and the pressure sensor is electrically connected to the drive motor.

6. The self-closing latch for a vehicle door according to claim 5, characterized in that: The buffer positioning component includes a slide groove, four of which are equidistantly arranged inside the sensing cylinder, and a buffer rod is slidably connected to the inner wall of the slide groove, and a rubber pad is fixedly connected to one end of the buffer rod facing the suction cylinder, a storage groove is arranged inside the sensing cylinder corresponding to the slide groove, and a limiting flow hole is arranged on the inner wall of the slide groove, the slide groove is connected with the storage groove through the limiting flow hole, and the inner wall aperture of the limiting flow hole is smaller than the inner wall aperture of the slide groove, and limiting grooves are symmetrically arranged on the inner wall of the slide groove, and a limiting block is symmetrically fixedly connected to the outer wall of the buffer rod away from the rubber pad, and the outer wall of the limiting block slides in contact with the inner wall of the limiting groove.

7. The self-closing latch for a vehicle door according to claim 6, characterized in that: The inner wall of the storage slot is fixedly connected with spring 2, and the other end of spring 2 is fixedly connected with a push disk corresponding to the flow limiting hole, the outer wall of the push disk slides in contact with the inner wall of the storage slot, and the push disk forms a telescopic structure with the storage slot through spring 2.

8. The self-closing latch for a vehicle door according to claim 1, characterized in that: The outer walls of the base 1 and the base 2 are both symmetrically fixed with mounting blocks.

Images