Automobile seat backrest framework assembly

Abstract

The utility model relates to the technical field of automobile seats, in particular to an automobile seat backrest framework assembly which comprises a backrest framework, a middle supporting frame is connected to the middle of the backrest framework, a bottom supporting frame is arranged below the middle supporting frame, a headrest part is installed above the backrest framework, and the headrest part is connected with the bottom supporting frame. An extension plate is arranged at the bottom of the headrest part, a mounting groove corresponding to the extension plate is formed in the joint of the extension plate and the backrest frame, a lifting sleeve is arranged at the front end of the extension plate, the top of the lifting sleeve is fixed to the bottom end face of the headrest part, and a lifting lead screw is mounted in the lifting sleeve through a lead screw nut. According to the utility model, the extension plate of which the length is greater than that of the lifting process of the headrest part is arranged on the headrest part, when the headrest part descends, the extension plate directly retracts into the backrest frame, no gap exists between the backrest frame and the headrest part, and even if the headrest part descends, passengers cannot be pinched, so that a certain protection effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile seats, in particular to an automobile seat back frame assembly. Background Art

[0002] The car seat frame is the basic component of the car seat, mainly composed of two parts: the cushion frame and the backrest frame. The car seat frame is usually made of welded steel pipes or stamped and welded steel plates. The seat frame is fixed directly to the car body with screws or through a seat adjustment device.

[0003] The patent specification with announcement number CN218577572U discloses a backrest frame assembly for a car seat, including a backrest frame rotatably connected to a seat basin, a headrest assembly being provided at the upper end of the backrest frame, and the headrest assembly being connected to a lifting and adjusting component arranged in the backrest frame, so as to realize stepless adjustment of the height of the seat headrest and meet the needs of passengers for fine adjustment of the headrest height; the headrest can change its angle according to the position of the passenger's head, so that it can be used in conjunction with different resting postures of the passenger, thereby improving the comfort of using the headrest.

[0004] However, in the implementation of relevant technologies, it was found that the backrest frame assembly of a car seat designed as above has the following problem: when the headrest is raised or lowered, there is a certain gap between the headrest and the backrest frame. If the rear passenger accidentally puts his hand between the headrest and the backrest frame of the front seat, the rear passenger may be easily injured when the headrest is lowered. In view of this, a car seat backrest frame assembly is provided to overcome the above defects. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes an automobile seat back frame assembly.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an automobile seat back frame assembly, including a back frame, a middle support frame is connected to the middle part of the back frame, and a bottom support frame is arranged below the middle support frame, a headrest portion is installed above the back frame, a mounting hole is opened inside the back frame, the middle support frame, the bottom support frame and the back frame are welded into shape, the back frame is connected to the angle adjustment mechanism on the vehicle body seat through the mounting hole, an extension plate is arranged at the bottom of the headrest portion, and the connection between the extension plate and the back frame A corresponding mounting groove is provided at the extension plate, a lifting sleeve is provided at the front end of the extension plate, and the top of the lifting sleeve is fixed to the bottom end surface of the headrest part, and a lifting screw is installed inside the lifting sleeve through a screw nut, and the extension plate and the headrest part form an L-shaped structure. When the headrest part rises, the extension plate slides upward in the backrest frame, and when the headrest part descends, the extension plate directly retracts into the backrest frame. The length of the extension plate is greater than the lifting process of the headrest part, and there is no gap between the backrest frame and the headrest part. Even if the headrest part descends, it will not pinch the passenger, which plays a certain protective role.

[0007] As a further description of the above technical solution: a driving gear is fixedly provided at the end of the lifting screw, and a driving gear is meshed on one side of the driving gear. The driving gear can drive the driving gear to rotate, thereby rotating the lifting screw, and the lifting sleeve is driven to rise and fall through the screw nut on the lifting screw, thereby driving the headrest part to rise and fall.

[0008] As a further description of the above technical solution: a transmission rod is fixedly inserted into the interior of the driving gear, and one end of the transmission rod passes through the backrest frame and is connected to an adjustment knob. After the adjustment knob drives the transmission rod to rotate, it can drive the driving gear to rotate, thereby realizing the lifting and lowering drive of the entire headrest.

[0009] As a further description of the above technical solution: the other end of the transmission rod is provided with a limit bearing fixed inside the backrest frame, and the limit bearing supports the transmission rod to play a limiting role.

[0010] As a further description of the above technical solution: the front end of the middle support frame is connected to a support spring, and a limiting rubber column is passed through the interior of the support spring, so that the middle support frame can increase the stability of the backrest frame.

[0011] As a further description of the above technical solution: a rubber pad is provided at the front end of the support spring, and both ends of the rubber pad are bonded and connected to the backrest frame. After the seat cover is put on the backrest frame, the passenger's back contacts the rubber pad through the seat cover, and the elastic effect of the rubber pad itself is used to improve comfort.

[0012] As a further description of the above technical solution: the two ends of the limiting rubber column are respectively connected to the middle support frame and the rubber pad, and the rubber pad is elastically connected to the middle support frame through the supporting spring and the limiting rubber column. The limiting rubber column can limit the vibration of the supporting spring, and the limiting rubber column and the supporting spring can further improve the elastic effect of the rubber pad.

[0013] The utility model has the following beneficial effects:

[0014] The utility model designs an automobile seat back frame assembly, in which an extension plate with a length greater than the lifting range of the headrest is arranged on the headrest portion. When the headrest portion descends, the extension plate directly retracts into the backrest frame. There is no gap between the backrest frame and the headrest portion. Even if the headrest portion descends, the passenger will not be pinched and injured, thereby playing a certain protective role.

[0015] The utility model designs an automobile seat back frame assembly, which increases the stability of the back frame by arranging a middle support frame in the middle of the back frame, and improves the comfort of the seat when in use by means of a limiting rubber column and a support spring on a rubber pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the headrest part of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the transmission rod of the utility model;

[0019] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0020] Legend:

[0021] 1. Backrest frame; 2. Headrest; 3. Middle support frame; 4. Rubber pad; 5. Adjustment knob; 6. Extension plate; 7. Lifting sleeve; 8. Lifting screw; 9. Bottom support frame; 10. Mounting hole; 11. Support spring; 12. Limit rubber column; 13. Limit bearing; 14. Transmission rod; 15. Driving gear; 16. Active gear. DETAILED DESCRIPTION

[0022] Reference Figure 1-4The utility model provides a car seat back frame assembly: including a back frame 1, a middle support frame 3 is connected to the middle of the back frame 1, and a bottom support frame 9 is arranged below the middle support frame 3, a headrest portion 2 is installed above the back frame 1, a mounting hole 10 is opened inside the back frame 1, the middle support frame 3, the bottom support frame 9 and the back frame 1 are welded, the back frame 1 is connected to the angle adjustment mechanism on the vehicle body seat through the mounting hole 10, an extension plate 6 is arranged at the bottom of the headrest portion 2, and a corresponding The installation groove is provided at the front end of the extension plate 6, and the top of the lifting sleeve 7 is fixed to the bottom end surface of the headrest part 2. The lifting screw 8 is installed inside the lifting sleeve 7 through the screw nut. The extension plate 6 and the headrest part 2 form an L-shaped structure. When the headrest part 2 rises, the extension plate 6 slides upward in the backrest frame 1. When the headrest part 2 drops, the extension plate 6 directly retracts to the inside of the backrest frame 1. The length of the extension plate 6 is greater than the lifting process of the headrest part 2. There is no gap between the backrest frame 1 and the headrest part 2. Even if the headrest part 2 drops, it will not pinch the passenger, which plays a certain protective role.

[0023] As a further implementation scheme of the above technical scheme: a driving gear 15 is fixedly provided at the end of the lifting screw 8, and a driving gear 16 is meshed with one side of the driving gear 15. The driving gear 16 can drive the driving gear 15 to rotate, thereby rotating the lifting screw 8, and driving the lifting sleeve 7 to rise and fall through the screw nut on the lifting screw 8, thereby driving the headrest part 2 to rise and fall.

[0024] As a further implementation scheme of the above technical scheme: a transmission rod 14 is fixedly penetrated inside the driving gear 16, and one end of the transmission rod 14 passes through the backrest frame 1 and is connected to the adjustment knob 5. After the adjustment knob 5 drives the transmission rod 14 to rotate, it can drive the driving gear 16 to rotate, thereby realizing the lifting and lowering drive of the entire headrest part 2.

[0025] As a further implementation scheme of the above technical scheme: the other end of the transmission rod 14 is provided with a limit bearing 13 fixed inside the backrest frame 1, and the limit bearing 13 supports the transmission rod 14 to play a limiting role.

[0026] During specific implementation, when it is necessary to raise or lower the headrest portion 2, the adjusting knob 5 is turned, and the adjusting knob 5 drives the transmission rod 14 to rotate inside the limit bearing 13, thereby driving the active gear 16 to rotate, thereby driving the driving gear 15 to rotate, and the driving gear 15 drives the lifting screw 8 to rotate, and drives the lifting sleeve 7 to rise and fall through the screw nut on the lifting screw 8. Since the length of the extension plate 6 is greater than the lifting process of the headrest portion 2, when the headrest portion 2 is lowered, the extension plate 6 directly retracts into the inside of the backrest frame 1. Since there is no gap between the backrest frame 1 and the headrest portion 2, even if the rear passenger puts his hand on the front seat and the headrest portion 2 is lowered, it will not pinch the passenger, thereby playing a certain protective role.

[0027] As a further implementation scheme of the above technical scheme: the front end of the middle support frame 3 is connected with a support spring 11, and a limiting rubber column 12 is penetrated inside the support spring 11, so that the middle support frame 3 can increase the stability of the backrest frame 1.

[0028] As a further implementation scheme of the above technical scheme: a rubber pad 4 is provided at the front end of the support spring 11, and the two ends of the rubber pad 4 are bonded and connected to the backrest frame 1. After the seat cover is put on the backrest frame 1, the passenger's back is in contact with the rubber pad 4 through the seat cover, and the elastic effect of the rubber pad 4 itself is used to improve the comfort.

[0029] As a further implementation scheme of the above technical scheme: the two ends of the limiting rubber column 12 are respectively connected to the middle support frame 3 and the rubber pad 4, and the rubber pad 4 is elastically connected to the middle support frame 3 through the supporting spring 11 and the limiting rubber column 12. The limiting rubber column 12 can limit the vibration of the supporting spring 11, and the limiting rubber column 12 and the supporting spring 11 can further improve the elastic effect of the rubber pad 4.

[0030] During specific implementation, the middle support frame 3, the bottom support frame 9 and the backrest frame 1 are welded into shape, the backrest frame 1 is connected to the angle adjustment mechanism on the vehicle body seat through the mounting hole 10 and a sponge seat cover is set on the entire backrest frame. When the passenger moves backwards towards the backrest frame 1, the rubber pad 4 will be squeezed inwards, and the limiting rubber column 12 and the supporting spring 11 will be compressed inwards. The elastic effect of the limiting rubber column 12 and the supporting spring 11 itself will play a buffering role and improve the comfort of the backrest.

[0031] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. 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 automobile seat back frame assembly, comprising a back frame (1), a middle support frame (3) connected to the middle of the back frame (1), a bottom support frame (9) arranged below the middle support frame (3), a headrest portion (2) arranged above the back frame (1), a mounting hole (10) arranged inside the back frame (1), characterized in that: An extension plate (6) is provided at the bottom of the headrest portion (2), and a corresponding mounting groove is provided at the connection between the extension plate (6) and the backrest frame (1), a lifting sleeve (7) is provided at the front end of the extension plate (6), and the top of the lifting sleeve (7) is fixed to the bottom end surface of the headrest portion (2), and a lifting screw (8) is installed inside the lifting sleeve (7) through a screw nut.

2. The automobile seat back frame assembly according to claim 1, characterized in that: A driving gear (15) is fixedly provided at the end of the lifting screw (8), and a driving gear (16) is meshed on one side of the driving gear (15).

3. The automobile seat back frame assembly according to claim 2, characterized in that: A transmission rod (14) is fixedly provided inside the driving gear (16), and one end of the transmission rod (14) passes through the backrest frame (1) and is connected to an adjustment knob (5).

4. The automobile seat back frame assembly according to claim 3, characterized in that: The other end of the transmission rod (14) is provided with a limit bearing (13) fixed inside the backrest frame (1).

5. The automobile seat back frame assembly according to claim 1, characterized in that: The front end of the middle support frame (3) is connected to a support spring (11), and a limiting rubber column (12) is inserted into the interior of the support spring (11).

6. The automobile seat back frame assembly according to claim 5, characterized in that: A rubber pad (4) is provided at the front end of the support spring (11), and both ends of the rubber pad (4) are bonded and connected to the backrest frame (1).

7. The automobile seat back frame assembly according to claim 6, characterized in that: The two ends of the limiting rubber column (12) are respectively connected to the middle support frame (3) and the rubber pad (4), and the rubber pad (4) is elastically connected to the middle support frame (3) via the supporting spring (11) and the limiting rubber column (12).

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