Back row seat backrest electric adjusting lock catch mechanism capable of automatically adjusting gap

Abstract

The utility model relates to a back row seat backrest electric adjusting lock catch mechanism capable of automatically adjusting a gap, which comprises a lock catch, a sliding block, a lead screw nut, a lead screw, a driving motor, a guide rod, a mounting base and a gap adjusting block, the mounting base is fixedly connected to a vehicle body near the back row seat backrest, and the driving motor is mounted on the side surface of the mounting base; the lead screw is rotationally connected to the mounting base, one end of the lead screw is connected with the output end of the driving motor, the guide rod is fixedly connected to the mounting base and is parallel to the lead screw, the lead screw nut is arranged on the lead screw in a sleeving mode and is in threaded connection with the lead screw, the sliding block is fixedly connected to the lead screw nut, and a guide hole in sliding connection with the guide rod is formed in the sliding block. The lock catch is fixedly connected to the sliding block and used for making contact with a seat backrest framework, a gap adjusting block is fixedly connected to the bottom of the sliding block, and the sliding block makes contact with the installation base through the gap adjusting block and slides on the installation base. The utility model has the advantages that the angle adjustment of the back-row backrest framework is more stable, and the noise is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile rear seats, in particular to an electric adjusting latch mechanism for the rear seat backrest with self-adjustable clearance. Background Art

[0002] With the continuous progress of technology, people's requirements for automobile seats are getting higher and higher. At present, the rear seat backrests of high-end automobiles are gradually increasing the electric adjustment function. However, there are problems of unstable adjustment during the adjustment process of the current rear seat backrests. For example, the Chinese patent CN 204184217 U discloses a utility model patent of "an electric angle adjustment mechanism for an automobile rear seat", which can realize the electric adjustment of the backrest angle of the rear seat. However, there are the following problems: 1. The moving support seat is machined by casting, with a high cost; 2. There is only one adjustment point between the moving support seat and the bottom plate, and it is impossible to well compensate for the swing. Another example is the patent number CN 216833323 U, which discloses a utility model patent of "a new type of electric seat latch", which optimizes the running stability and noise. However, there are the following problems: 1. The slider is an open structure and two additional rods need to be welded for reinforcement; 2. The clearance adjustment part is directly located under the lead screw, and the contribution to the stability is limited. Summary of the Utility Model

[0003] In view of the above problems, the purpose of the present utility model is to provide an electric adjusting latch mechanism for the rear seat backrest with self-adjustable clearance, which is used to optimize the running stability and noise during the electric adjustment of the rear seat backrest, so as to overcome the deficiencies of the above-mentioned prior art.

[0004] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0005] An electric adjustment lock mechanism for the rear seat backrest with self-adjustable clearance, comprising: an electric adjustment lock mechanism for adjusting the angle of the rear seat backrest, the electric adjustment lock mechanism including: a lock, a slider, a lead screw nut, a lead screw, a driving motor, a guide rod, a mounting base, and a clearance adjustment block, the mounting base being fixedly connected to the vehicle body near the rear seat backrest, the driving motor being installed on the side of the mounting base, the lead screw being rotatably connected to the mounting base, one end of the lead screw being connected to the output end of the driving motor, the guide rod being fixedly connected to the mounting base and arranged parallel to the lead screw, the lead screw nut being sleeved on the lead screw and threadedly connected to the lead screw, the slider being fixedly connected to the lead screw nut, a guide hole for slidably connecting with the guide rod being formed on the slider, the lock being fixedly connected to the slider and used for contacting the seat backrest skeleton, a clearance adjustment block being fixedly connected to the bottom of the slider, the slider contacting the mounting base through the clearance adjustment block and sliding on the mounting base, the driving motor driving the lead screw to rotate on the mounting base, the rotating guide rod driving the lead screw nut to reciprocate on the guide rod, the lead screw nut driving the slider to reciprocate on the mounting base, and the front-and-back moving slider driving the lock to contact and limit the seat backrest skeleton, thereby adjusting the backrest angle.

[0006] As a preference of the present utility model, the lead screw is perpendicularly arranged to the rotating shaft at the bottom of the seat backrest skeleton.

[0007] As a preference of the present utility model, the mounting base is U-shaped.

[0008] As a preference of the present utility model, the slider is in the shape of a box-like block, a hexagonal connection hole and a circular hole being formed on the slider, the outer periphery of the lead screw nut being arranged as a hexagon, the outer periphery of the lead screw nut being inserted into the hexagonal connection hole and welded and fixed, and the guide rod passing through the circular hole and moving within the circular hole.

[0009] As a preference of the present utility model, insertion slots are arranged on both sides of the top surface of the clearance adjustment block, insertion protrusions are arranged at the positions corresponding to the insertion slots at the bottom of the slider, the slider is fixedly connected to the clearance adjustment block through the insertion protrusions, sliding protrusions are arranged on both sides of the bottom surface of the clearance adjustment block, and the clearance adjustment block contacts the mounting base through the sliding protrusions and slides on the mounting base.

[0010] As a preference of the present utility model, shock absorption grooves are arranged on the side surface of the sliding protrusion.

[0011] As a preference of the present utility model, the lock is fixedly connected to the top surface of the slider by riveting or welding.

[0012] As a preference of the present utility model, the straight rod side of the lock contacts the seat backrest skeleton.

[0013] As a preference of the present utility model, the material of the clearance adjustment block is polyoxymethylene.

[0014] The advantages and positive effects of the present utility model are as follows:

[0015] 1. The slider of the present utility model adopts a box structure to improve the stability and strength requirements under extreme conditions of the lock.

[0016] 2. By adding a clearance adjustment block at the bottom of the slider of the present utility model, the clearance adjustment block slides on the mounting base to achieve self-balancing adjustment of the movement of the lock around the lead screw shaft. The bottom of the clearance adjustment block contacts the mounting base through the bottom sliding protrusion, thereby reducing friction and increasing service life. In addition, a shock-absorbing groove is provided on the side of the sliding protrusion to balance and adjust the slight swing transmitted from the lock hook. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is an exploded view of the overall structure of the utility model.

[0019] Reference Signs: Lock 1, Slider 2, Lead Screw Nut 3, Lead Screw 4, Driving Motor 5, Guide Rod 6, Mounting Base 7, Clearance Adjustment Block 8, Guide Hole 9, Hexagonal Connection Hole 10, Insertion Slot 11, Insertion Protrusion 12, Sliding Protrusion 13, Shock-Absorbing Groove 14. Detailed Embodiment

[0020] Refer to Figure 1-2, this embodiment provides an electric adjustment lock mechanism for the rear seat backrest with self-adjustable clearance, including: an electric adjustment lock mechanism for adjusting the angle of the rear seat backrest. The electric adjustment lock mechanism includes: a lock 1, a slider 2, a lead screw nut 3, a lead screw 4, a drive motor 5, a guide rod 6, a mounting base 7, and a clearance adjustment block 8. The mounting base 7 is fixedly connected to the vehicle body near the rear seat backrest. The drive motor 5 is installed on the outer side of the mounting base 7. The drive motor 5 is a lead screw motor. The lead screw 4 is rotatably connected to the mounting base and connected to the drive motor 5. The drive motor 5 drives the lead screw 4 to rotate on the mounting base. Two guide rods 6 are fixedly connected to the mounting base 7. The two guide rods 6 are located on both sides of the lead screw 4. The two guide rods 6 and the lead screw 4 are all horizontally arranged. The lead screw nut 3 is sleeved on the lead screw 4 and threadedly connected to the lead screw 3. The slider 2 is fixedly connected to the lead screw nut 3. Two guide holes 9 for slidably connecting with the two guide rods 6 are opened on the slider 2. A hexagonal connection hole 10 is also opened on the slider 2. The lock 1 is fixedly connected to the slider 2 and used to contact the seat backrest frame. A clearance adjustment block 8 is fixedly connected to the bottom of the slider 2. The slider 2 contacts the mounting base 7 through the clearance adjustment block 8 and slides on the mounting base 7. The drive motor 5 drives the lead screw 4 to rotate on the mounting base 7. The rotating lead screw 4 drives the lead screw nut 3 to move linearly on the guide rod. The lead screw nut 3 drives the slider 2 to reciprocate on the mounting base 7. The forward and backward moving slider 2 drives the lock 1 to contact and limit the seat backrest frame, thereby adjusting the backrest angle. The lead screw 4 is vertically arranged with the rotating shaft at the bottom of the seat backrest frame, that is, the seat backrest frame is perpendicular to the lead screw 4.

[0021] Furthermore, the mounting base 7 in this embodiment is U-shaped. The U-shaped mounting base 7 facilitates the installation of the slider 2 and can also make the electric adjustment lock mechanism more compact.

[0022] Furthermore, the slider 2 in this embodiment is a box-shaped block. The box-shaped block with a hollow interior can improve the stability and strength requirements for the lock 1 in extreme cases. The hexagonal connection hole 10 on the slider 2 is used to match the hexagon on the outer circumference of the lead screw nut 3, so that the positioning is accurate when the lead screw nut 3 is welded to the hexagonal connection hole 10, thereby improving the accuracy of angle adjustment. The shapes of the two guide holes 9 are circular holes. Correspondingly, the two guide rods 6 are cylindrical guide rods. The cylindrical guide rods 6 pass through the circular guide holes 9 and move in the guide holes 9 to improve the linear movement accuracy of the slider 2.

[0023] Furthermore, plug-in slots 11 are provided on both sides of the top surface of the gap adjustment block 8 in this embodiment. Plug-in protrusions 12 are provided at the positions corresponding to the plug-in slots 11 at the bottom of the slider 2. The slider 2 is fixedly connected to the gap adjustment block 8 through the plug-in protrusions 12. Sliding protrusions 13 are provided on both sides of the bottom surface of the gap adjustment block 8. The gap adjustment block 8 contacts the mounting base 7 through the sliding protrusions 13 and slides on the mounting base 7. A shock-absorbing groove 14 is provided on the side surface of the sliding protrusion 13. The gap adjustment block 8 slides on the mounting base 7 through the sliding protrusions 13. The sliding protrusions 13 can reduce the contact area and improve the service life of the gap adjustment block 8. The shock-absorbing groove 14 on the sliding protrusion 13 serves as a weakening groove for balancing the slight swing transmitted from the adjustment locking hook. The material of the gap adjustment block 8 is polyoxymethylene.

[0024] Furthermore, the buckle 1 in this embodiment is fixedly connected to the top surface of the slider 2 by riveting or welding. The straight rod side of the buckle 1 contacts the seat back frame.

[0025] Working principle: When the seat back frame is stationary, the buckle 1 abuts against the back of the seat back frame as a fixed support. When the angle of the seat back frame needs to be adjusted, the angle of the seat back frame is indirectly adjusted by controlling the forward or backward movement of the buckle 1.

[0026] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An electric adjustment latch mechanism for the rear seat backrest with self-adjustable clearance, characterized in that, Including: An electric adjustment latch mechanism for adjusting the angle of the rear seat backrest. The electric adjustment latch mechanism includes: a latch, a slider, a lead screw nut, a lead screw, a drive motor, a guide rod, a mounting base, and a clearance adjustment block. The mounting base is fixedly connected to the vehicle body near the rear seat backrest. The drive motor is installed on the side of the mounting base. The lead screw is rotatably connected to the mounting base. One end of the lead screw is connected to the output end of the drive motor. The guide rod is fixedly connected to the mounting base and is arranged parallel to the lead screw. The lead screw nut is sleeved on the lead screw and is threadedly connected to the lead screw. The slider is fixedly connected to the lead screw nut. A guide hole slidably connected to the guide rod is formed on the slider. The latch is fixedly connected to the slider and is used to contact the seat backrest frame. A clearance adjustment block is fixedly connected to the bottom of the slider. The slider contacts the mounting base through the clearance adjustment block and slides on the mounting base. The drive motor drives the lead screw to rotate on the mounting base. The rotating guide rod drives the lead screw nut to reciprocate on the guide rod. The lead screw nut drives the slider to reciprocate on the mounting base. The reciprocating slider drives the latch to contact and limit the seat backrest frame, thereby adjusting the backrest angle.

2. The electric adjustment latch mechanism for the rear seat backrest with self-adjustable clearance according to claim 1, characterized in that, The lead screw is perpendicular to the rotating shaft at the bottom of the seat backrest frame.

3. The electric adjustment locking mechanism for the rear seat backrest with self-adjustable clearance according to claim 1, characterized in that The mounting base is U-shaped.

4. The electric adjustment lock mechanism for the rear seat backrest with self-adjustable clearance according to claim 1, characterized in that The slider is in the shape of a box block. A hexagonal connection hole and a circular hole are formed on the slider. The outer circumference of the lead screw nut is set to be hexagonal. The outer circumference of the lead screw nut is inserted into the hexagonal connection hole and welded and fixed. The guide rod passes through the circular hole and moves within the circular hole.

5. An electric adjustment lock mechanism for a rear seat backrest with self-adjustable clearance according to claim 1, characterized in that, Insertion grooves are arranged on both sides of the top surface of the clearance adjustment block. Insertion protrusions are arranged at the positions corresponding to the insertion grooves on the bottom of the slider. The slider is fixedly connected to the clearance adjustment block through the insertion protrusions. Sliding protrusions are arranged on both sides of the bottom surface of the clearance adjustment block. The clearance adjustment block contacts the mounting base through the sliding protrusions and slides on the mounting base.

6. The electric adjustment locking mechanism for the rear seat backrest with self-adjustable clearance according to claim 1, characterized in that, A damping groove is arranged on the side surface of the sliding protrusion.

7. An electric adjustment latch mechanism for the rear seat backrest with self-adjustable clearance according to claim 1, characterized in that, The latch is fixedly connected to the top surface of the slider by riveting or welding.

8. The electric adjustment lock mechanism for the rear seat backrest with self-adjustable gap according to claim 1, characterized in that, The straight rod side of the latch contacts the seat backrest frame.

9. The electric adjustment lock mechanism for the rear seat backrest with self-adjustable clearance according to claim 1, characterized in that, The material of the clearance adjustment block is polyoxymethylene.

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