Electric adjusting system for automobile seat backrest

Abstract

The utility model relates to an automobile seat backrest electric adjusting system which comprises an installation fixing plate, a movable support, a lock catch assembly, a connecting piece, a limiting piece assembly and a transmission assembly, an arc-shaped guide groove is formed in the installation fixing plate, and the lock catch assembly is installed on the arc-shaped guide groove of the installation fixing plate through the limiting piece assembly. The transmission assembly drives the movable support to move, a sliding hole is formed in the movable support, a connecting piece is arranged between the lock catch assembly and the movable support, the lower end of the connecting piece is fixedly connected with the lock catch assembly, the upper section of the connecting piece extends into the sliding hole, a connecting nut is screwed at the top end of the connecting piece, and the upper section of the connecting piece moves in the sliding hole. The seat backrest adjusting device is more suitable for the motion trail when the seat backrest is adjusted, the adjusting process is more stable and reliable, the requirement for a larger seat backrest adjusting angle can be met, and the comfort satisfaction degree of passengers is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile seats, in particular to an electric adjustment system for an automobile seat backrest. Background Art

[0002] Most of the existing electric adjustment systems for car seat backs follow the principle of linear motion for angle adjustment, while the seat back is adjusted in an arc motion, which requires a high tolerance for the locking mechanism and a small adjustable angle range, which has great limitations. This reduces the stability during the adjustment process. In view of the above shortcomings, this solution proposes improvements. Utility Model Content

[0003] The utility model provides an automobile seat back adjustment system, which solves the above problems existing in the use process of the prior art.

[0004] The technical solution of the utility model is achieved in this way:

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An electric adjustment system for a car seat backrest comprises a mounting plate, a movable bracket, a locking assembly, a connecting member assembly, a limiting member assembly and a transmission assembly, wherein the mounting plate is provided with an arc-shaped guide groove, the locking assembly is mounted on the arc-shaped guide groove of the mounting plate through a limiting member, the transmission assembly drives the movable bracket to move, the movable bracket is provided with a sliding hole, a connecting member assembly is provided between the locking assembly and the movable bracket, the lower end of the connecting member assembly is fixedly connected to the locking assembly, the upper section extends into the sliding hole, and the upper section of the connecting member assembly moves in the sliding hole.

[0007] Preferably, the arc-shaped guide groove has a left limit end and a right limit end, the left limit end and the right limit end are in the same horizontal plane and the midline of the two is the middle of the arc-shaped guide groove.

[0008] Preferably, the sliding hole is an oblong hole having an inner end and an outer end. When the upper section of the connecting member assembly is at the inner end of the sliding hole, the locking member is at the middle of the arc-shaped guide groove. When the upper section of the connecting member assembly is at the outer end of the sliding hole, the locking member is at the left limit end or the right limit end of the arc-shaped guide groove.

[0009] Preferably, the limit member assembly includes a limit member, a limit member sleeve, a limit member gasket and a lock support block. The limit member passes through the limit member gasket, the limit member sleeve, the arc guide groove, and then through the lock support block to be connected with the lock assembly. Under the action of external force, the limit member can make an arc movement along the arc guide groove.

[0010] Preferably, there are two limit members, each including a section of thread. During assembly, the two limit members pass through two holes on the limit member gasket and then through the limit member sleeve. There are two limit member sleeves and two lock support blocks.

[0011] Preferably, the stopper sleeve has a first working surface and a second working surface, the first working surface contacts the lower plane of the arc-shaped guide groove, and the second working surface contacts the vertical surface of the arc-shaped guide groove and slides along it. The first working surface of the stopper sleeve, the stopper gasket, and the stopper are all below the lower plane of the arc-shaped guide groove.

[0012] Preferably, the lock support block includes a third working surface, which contacts the upper plane of the arc guide groove. The lock support block is above the upper plane of the arc guide groove and below the lock bracket. The lower plane of the lock bracket contacts the lock support block. The limit piece passes through the lock support block and is connected to the threaded hole on the lock bracket.

[0013] Preferably, the transmission assembly includes a motor and a screw rod, the screw rod rotates under the action of the motor, and a screw nut is connected to the movable bracket, and the screw nut cooperates with the screw rod to drive the movable bracket to perform linear motion.

[0014] Preferably, the locking assembly comprises a locking body, a locking bracket and a round hole self-lubricating sleeve, the locking bracket is provided with a round hole and two threaded holes, and the round hole self-lubricating sleeve is inserted into the round hole.

[0015] Preferably, the movable bracket includes a movable bracket body, a screw nut, a movable bracket support block, and a spring. The screw nut is welded to the movable bracket body. The movable bracket support block has two spring grooves. There are two springs in total, which are installed in the spring grooves. The movable bracket support block is installed under the screw nut. Under the action of the spring, the gap between the screw nut and the screw can be effectively eliminated. Two round holes and an oblong hole are opened on the movable bracket, both of which are equipped with self-lubricating sleeves.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the cooperation between the movable bracket and the lock buckle, because there is an oblong hole on the movable bracket, when driving the lock buckle to move, the lock buckle can move forward and backward and rotate to a certain extent, meeting the conditions for arc movement. Compared with the electric adjustment system of the car seat backrest in which the lock buckle moves in a straight line, the utility model is more suitable for the movement trajectory of the seat backrest adjustment, making the adjustment process more stable and reliable, and can meet a larger seat backrest adjustment angle, improving passenger comfort satisfaction.

[0017] The utility model adopts the dual cooperation of the guide rod and the screw rod, and the movable bracket includes a movable bracket support block, which can effectively eliminate the assembly gap, reduce the shear force received during the screw rod transmission process, and ensure the stability during operation. In this way, the screw rod can be made longer to meet a larger seat back adjustment angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 This is an exploded overall diagram of an automobile seat back adjustment system according to a specific implementation method of the utility model in Example 1;

[0020] Figure 2 It is a structural schematic diagram of different sliding states of a specific implementation method of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the mobile bracket of the utility model;

[0022] Figure 4 Schematic diagram of the overall structure of the lock;

[0023] Figure 5 is a schematic diagram of a lock support block structure;

[0024] Figure 6 It is a structural schematic diagram of the limiter sleeve;

[0025] Figure 7 This is a display diagram of a limiter;

[0026] Figure 8 A schematic diagram of a front seat back with a stopper. DETAILED DESCRIPTION

[0027] The following will be combined with the attached embodiment of the present utility model Figure 1-8 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0028] like Figures 1 to 6As shown, this embodiment discloses an electric adjustment system for a car seat backrest, including a mounting plate 1, a movable bracket 2, a locking assembly 4, a connecting member assembly 3, a limiting member assembly and a transmission assembly. The mounting plate 1 is provided with an arc-shaped guide groove 11, the locking assembly is installed on the arc-shaped guide groove 11 of the mounting plate through a limiting member, the transmission assembly drives the movable bracket to move, the movable bracket is provided with a sliding hole, the sliding hole is an oblong hole, a connecting member assembly 3 is provided between the locking assembly and the movable bracket, the lower end of the connecting member assembly is fixedly connected to the locking assembly, the upper section extends into the sliding hole, a connecting nut 31 can be screwed on the top to prevent the connecting member assembly from falling, and the upper section of the connecting member assembly moves in the sliding hole. The limiter assembly includes a limiter 54, a limiter sleeve 52, a limiter gasket 53 and a lock support block 51. The limiter 54 passes through the limiter gasket 53, the limiter sleeve 52, the arc guide groove 11, and then the lock support block 51 to connect with the lock assembly. Under the action of external force, it can make arc motion along the arc guide groove. The transmission assembly includes a motor 61 and a screw 62. The screw 62 rotates under the action of the motor 61. The movable bracket is connected with a screw nut 21. This scheme adopts welding. The screw nut 21 cooperates with the screw 62 to drive the movable bracket to move linearly. The movable bracket is provided with an oblong hole, and the lock assembly is provided with a round hole. They are connected together through the connector assembly 3. At that time, the movable bracket 2 drives the lock assembly to move to complete the series connection. Because of the oblong hole of the movable bracket, the lock can be displaced and rotated relative to the movable bracket when it moves in an arc, and will not be restricted.

[0029] refer to Figure 2 The arc-shaped guide groove has a left limit end A and a right limit end C, the left limit end and the right limit end are in the same horizontal plane and the midline of the two is the middle part B of the arc-shaped guide groove. The sliding hole has an inner end 221 and an outer end 222. When the upper section of the connector assembly is at the inner end 221 of the sliding hole, the lock assembly is at the middle part B of the arc-shaped guide groove. When the upper section of the connector assembly is at the outer end 222 of the sliding hole, the lock assembly is at the left limit end A or the right limit end C of the arc-shaped guide groove. The motor drives the screw to rotate, and the moving bracket moves along the screw and the guide rod under the cooperation of the screw and the screw nut. The moving bracket drives the lock to make an arc motion along the arc-shaped guide groove through the connector assembly.

[0030] Further, refer to Figure 4 The lock assembly includes a lock body 41, a lock bracket 42 and a round hole self-lubricating sleeve 43. The lock bracket 42 is provided with a round hole and two threaded holes 44. The round hole self-lubricating sleeve 43 is installed in the round hole.

[0031] Further, refer to Figure 7 and Figure 8 The first solution of the limit member 54 is to set one, including a section of thread. When assembling, the limit member passes through the hole on the limit member gasket 53 and then passes through the limit member sleeve 52.

[0032] Furthermore, the preferred solution of this scheme is: there are two limit members 54, each including a section of thread, and when assembled, the two limit members pass through the two holes on the limit member gasket 53, and then pass through the limit member shaft sleeve 52, there are two limit member shaft sleeves 52, and there are two lock support blocks 51, which improves the stability of operation, wherein the limit member gasket can have a certain width and thickness, which can prevent the limit member from escaping from the guide groove and causing failure when performing a high-strength destructive test.

[0033] Further, refer to Figure 6 The stopper sleeve 52 has a first working surface 521 and a second working surface 522. The first working surface 521 contacts the lower plane of the arc-shaped guide groove, and the second working surface 522 contacts the vertical surface of the arc-shaped guide groove and slides along it. The first working surface 521 of the stopper, the stopper gasket 53, and the stopper 54 are all below the lower plane of the arc-shaped guide groove.

[0034] Further, refer to Figure 5 The lock support block 51 includes a third working surface 511, which contacts the upper plane of the arc guide groove. The lock support block 51 is above the upper plane of the arc guide groove and below the lock bracket 42. The lower plane of the lock bracket 42 contacts the lock support block 51. The limiter 54 passes through the threaded hole on the lock support block and the lock bracket to complete the series connection. The lock can move in an arc along the arc guide groove under the action of external force. The limiter sleeve and the lock support block are hard plastic parts, which can effectively eliminate abnormal noise and gap during movement, improve comfort, and ensure stability during operation.

[0035] Further, refer to Figure 3 The movable bracket 2 includes a movable bracket body 22, a screw nut 21, a movable bracket support block 26, and a spring 25. The screw nut 21 is welded to the movable bracket body 22. The movable bracket support block 26 has two spring slots 27. There are two springs 25 installed in the spring slots 27. The movable bracket support block 26 is installed under the screw nut. Under the action of the spring, the gap between the screw nut and the screw can be effectively eliminated to ensure stability during movement. The movable bracket has two round holes and an oblong hole, both of which are equipped with self-lubricating sleeves 24.

[0036] Furthermore, the transmission assembly includes a motor 61, a screw 62, and a guide rod 63, all of which are mounted on the mounting plate 1. The screw 62 is connected to the motor 61, and the screw 62 can rotate under the action of the motor 61. The screw 62 passes through the screw nut 21, and the guide rod 63 passes through two round holes on the movable bracket 2 in sequence. Both round holes are equipped with round hole self-lubricating sleeves 28. Under the action of the motor, the screw rotates and drives the movable bracket to move linearly along the guide rod. The utility model adopts the dual coordination of the guide rod and the screw, and the movable bracket contains a movable bracket support block, which can effectively eliminate the assembly gap, reduce the shear force received during the screw transmission process, and ensure the stability during operation, so that the screw can be made longer to meet a larger seat back adjustment angle.

[0037] Furthermore, the connector assembly 3 includes a connector 33, a connecting nut 31, and a connecting gasket 32. The connector 33 passes through the circular hole on the locking bracket, passes through the connecting gasket 32, and then passes through the oblong hole 23 on the movable bracket to connect with the connecting nut 31, thereby completing the series connection, preventing the connector from falling off, and further improving the reliability of operation.

[0038] In summary, the cooperation between the movable bracket 2 and the lock assembly, due to the oblong hole on the movable bracket, when driving the lock assembly to move, the lock assembly can move forward and backward and rotate to a certain extent, meeting the conditions for arc movement. Compared with the electric adjustment system of the car seat back in which the lock performs linear movement, the utility model is more suitable for the movement trajectory of the seat back adjustment, making the adjustment process more stable and reliable, and can meet a larger seat back adjustment angle, improving passenger comfort satisfaction.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric adjustment system for a car seat back, characterized in that: It includes an installation and fixing plate, a mobile bracket, a locking assembly, a connecting member assembly, a limiting member assembly and a transmission assembly. The installation and fixing plate is provided with an arc-shaped guide groove. The locking assembly is installed on the arc-shaped guide groove of the installation and fixing plate through the limiting member assembly. The transmission assembly drives the mobile bracket to move. The mobile bracket is provided with a sliding hole. A connecting member assembly is provided between the locking assembly and the mobile bracket. The lower end of the connecting member assembly is fixedly connected to the locking assembly, and the upper section extends into the sliding hole. The upper section of the connecting member assembly moves in the sliding hole.

2. The electric adjustment system for a vehicle seat backrest according to claim 1, characterized in that: The arc-shaped guide groove has a left limiting end and a right limiting end, the left limiting end and the right limiting end are in the same horizontal plane and the midline of the two is the middle of the arc-shaped guide groove.

3. The electric adjustment system for a vehicle seat backrest according to claim 2, characterized in that: The sliding hole is an oblong hole with an inner end and an outer end. When the upper section of the connecting member assembly is at the inner end of the sliding hole, the locking member is at the middle of the arc-shaped guide groove. When the upper section of the connecting member assembly is at the outer end of the sliding hole, the locking member is at the left limit end or the right limit end of the arc-shaped guide groove.

4. An electric adjustment system for a vehicle seat back according to claim 1, 2 or 3, characterized in that: The limit member assembly includes a limit member, a limit member sleeve, a limit member gasket and a lock support block. The limit member passes through the limit member gasket, the limit member sleeve, the arc guide groove, and then the lock support block to be connected with the lock assembly. Under the action of external force, the limit member can move in an arc along the arc guide groove.

5. The electric adjustment system for a vehicle seat backrest according to claim 4, characterized in that: There are two limiters, each including a section of thread. When assembled, the two limiters pass through two holes on the limiter gasket and then through the limiter sleeve. There are two limiter sleeves and two lock support blocks.

6. The electric adjustment system for a vehicle seat backrest according to claim 5, characterized in that: The limit member sleeve has a first working surface and a second working surface, the first working surface contacts the lower plane of the arc guide groove, the second working surface contacts the vertical surface of the arc guide groove and slides along it, and the first working surface of the limit member sleeve, the limit member gasket, and the limit member are all below the lower plane of the arc guide groove.

7. The electric adjustment system for a vehicle seat backrest according to claim 6, characterized in that: The lock support block includes a third working surface, which contacts the upper plane of the arc guide groove. The lock support block is above the upper plane of the arc guide groove and below the lock bracket. The lower plane of the lock bracket contacts the lock support block. The limit piece passes through the lock support block and is connected to the threaded hole on the lock bracket.

8. The electric adjustment system for a vehicle seat backrest according to claim 1, characterized in that: The transmission assembly includes a motor and a lead screw, the lead screw rotates under the action of the motor, a lead screw nut is connected to the movable bracket, and the lead screw nut cooperates with the lead screw to drive the movable bracket to perform linear motion.

9. The electric adjustment system for a vehicle seat backrest according to claim 1, characterized in that: The lock assembly comprises a lock body, a lock bracket and a round hole self-lubricating sleeve. The lock bracket is provided with a round hole and two threaded holes, and the round hole self-lubricating sleeve is inserted into the round hole.

10. The electric adjustment system for a vehicle seat backrest according to claim 1, characterized in that: The movable bracket includes a movable bracket body, a screw nut, a movable bracket support block, and a spring. The screw nut is welded to the movable bracket body. The movable bracket support block has two spring grooves. There are two springs in total, which are installed in the spring grooves. The movable bracket support block is installed under the screw nut. Under the action of the spring, the gap between the screw nut and the screw can be effectively eliminated. Two round holes and an oblong hole are opened on the movable bracket, both of which are equipped with self-lubricating sleeves.

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