Rear support assembly for automobile seat framework

Abstract

The rear supporting assembly for the automobile seat framework comprises a backrest framework, an installation box is fixed to the middle of the upper end of the backrest framework, guide rods are installed on the two sides of the interior of the installation box in an up-down sliding mode, and a lifting plate is fixedly connected to the bottoms of the two guide rods. A first spring is connected between the top of the lifting plate and the top of the inner side of the mounting box, a lifting adjusting block is arranged on the lower portion of one side of the backrest framework, a traction rope is connected between the bottom of the lifting plate and the lifting adjusting block, and when the sliding block is lifted upwards, the traction rope can be used for driving the lifting plate, the guide rod and the headrest to move downwards for adjustment. When the sliding block and the traction rope move downwards, the first spring can automatically contract and drive the lifting plate, the guide rod and the headrest to be adjusted upwards, the pin rod can be loosened after adjustment is completed, the pin rod is inserted into the corresponding positioning hole in the inner side of the box body, and therefore the sliding block, the traction rope, the headrest and the like are positioned and stabilized, operation is easy, and the structural design is reasonable.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, specifically to a rear support assembly for an automotive seat frame. Background Technology

[0002] The car seat frame is a crucial component of a car seat, ensuring its overall strength. The rear support assembly, part of the seat frame (at the backrest end), withstands the pressure of occupants. Modern car seats typically have headrests mounted on the backrest, usually integrated into the rear support assembly, and these headrests are height-adjustable. Higher-spec cars often feature automatic headrest adjustment, while some lower-spec vehicles, to reduce costs, use manual adjustment. These manual adjustment switches are typically located at the connection between the headrest rod and the top of the backrest, making it impossible for occupants to adjust while seated; they must stand up and turn over to make adjustments, resulting in relatively fixed adjustments. In related technologies, such as the rear support assembly for an automobile seat frame in patent CN222202344U, when adjusting the headrest up and down, the driver or other personnel do not need to turn over and adjust the headrest. They can sit down and directly turn the knob forward or reverse. The lead screw rotates and drives one end of the slider (forward rotation, the slider pulls the traction rope, at which time the spring elastically contracts, and the headrest moves down with the lifting plate; reverse rotation, the slider releases the traction rope, at which time the spring elastically extends, and under the action of the spring elastic force, the headrest moves up with the lifting plate). The adjustment is convenient and quick.

[0003] The aforementioned device and technical solution still have some shortcomings in use. For example, the up and down movement of the lifting plate is achieved by the reaction force of the lead screw, traction rope and spring. However, after the height is adjusted, the reverse thrust of the spring and the continuous vibration and bumps of the car will cause the lead screw to slowly rotate back, causing the lifting plate and headrest to rise continuously, which makes the use and adjustment of the headrest inconvenient. Based on this, it is necessary to improve and perfect the existing technology to improve its practicality. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] Therefore, the purpose of this utility model is to provide a rear support assembly for an automobile seat frame, so as to solve the problem mentioned in the background art that after the height of the existing rear support assembly for automobile seat frames is adjusted, the reverse thrust of the spring and the continuous vibration and bumps of the car will cause the lead screw to slowly rotate back, causing the lifting plate and headrest to continuously rise, which brings inconvenience to the use and adjustment of the headrest.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a rear support assembly for an automobile seat frame, comprising a backrest frame, a mounting box fixed at the center of the upper end of the backrest frame, guide rods slidably mounted on both sides inside the mounting box, a lifting plate fixedly connected to the bottom of the two guide rods, a first spring connected between the top of the lifting plate and the top of the inner side of the mounting box, a lifting adjustment block provided on the lower part of one side of the backrest frame, a traction rope connected between the bottom of the lifting plate and the lifting adjustment block, the traction rope and the lifting plate moving up and down by adjusting the lifting adjustment block, and a headrest holder provided on the top of the guide rods.

[0007] As a preferred embodiment of the rear support assembly for an automotive seat frame described in this utility model, two first springs are provided and are respectively located on both sides of the upper end of the lifting plate, and sliding sleeves that slide vertically and vertically with the guide rod are also fixed on both sides of the upper end of the mounting box.

[0008] As a preferred embodiment of the rear support assembly for an automotive seat frame described in this utility model, the lifting adjustment block includes a box body longitudinally fixed to one side of the back frame, a plurality of positioning holes along the height direction of the inner side of the box body, a slider that slides up and down inside the box body and extends one end to the outer side of the box body, a pin that slides horizontally through the inside and both ends of the slider, a second spring sleeved on the outer periphery of the pin and located inside the box body, and a lever fixed to the outer end of the pin.

[0009] The second spring is fixedly connected to the outer periphery of the pin at one end near the lever.

[0010] In a preferred embodiment of the rear support assembly for an automotive seat frame described in this utility model, the traction rope is made of steel wire rope, and a guide tube is sleeved on the outside of the traction rope and fixed to the back frame and the bottom of the mounting box.

[0011] As a preferred embodiment of the rear support assembly for an automotive seat frame described in this utility model, the headrest holder includes a mounting block horizontally fixed to the upper end of a guide rod, an insertion hole located on one side of the mounting block and extending upwards, a sliding groove located inside the mounting block and connected at one end to the insertion hole, a sloping block that slides horizontally inside the sliding groove and extends at one end to the inside of the insertion hole, a third spring with one end abutting against the inner end of the sliding groove and the other end abutting against the longitudinal end of the sloping block, and a finger pull block fixed to one side of the sloping block and passing through the outside of the mounting block.

[0012] The mounting block also has a clearance groove on one side that corresponds to the finger pull block.

[0013] As a preferred embodiment of the rear support assembly for an automotive seat frame described in this utility model, the mounting box has an inspection port and a corresponding inspection cover on one side.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: When adjusting the headrest, the driver and passenger only need to sit in their original position and then use the lever to pull the pin outward and slide the slider up and down. During this process, when the slider is pulled upward, the lifting plate, guide rod and headrest can be moved downward by the traction rope. When the slider and traction rope are moved downward, the first spring will automatically contract and drive the lifting plate, guide rod and headrest upward. After the adjustment is completed, the pin can be released, so that the pin can be inserted into the corresponding positioning hole on the inside of the box, thereby positioning and stabilizing the slider, traction rope and headrest. The operation is simple and the structure is reasonable. The driver and passenger can adjust the height of the headrest without standing up and turning over. Compared with the prior art, it is more stable and practical in headrest adjustment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the rear view of the back-support frame structure of this utility model;

[0016] Figure 2 This is a partial cross-sectional view of the rear-mounted frame structure of this utility model.

[0017] Figure 3 This utility model Figure 2 A magnified view of the structure at point A in the middle;

[0018] Figure 4 This is a schematic diagram of the headrest holder structure of this utility model.

[0019] In the diagram: 100, backrest frame; 200, mounting box; 210, guide rod; 220, lifting plate; 230, first spring; 240, sliding sleeve; 250, inspection rear cover; 300, lifting adjustment block; 310, box body; 3101, positioning hole; 320, slider; 330, pin; 340, second spring; 350, lever; 400, traction rope; 500, guide tube; 600, headrest holder; 610, mounting block; 6101, insertion hole; 6102, slide groove; 620, inclined plate block; 630, third spring; 640, finger pull block. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0023] Figures 1-4 The diagram shown is a complete structural schematic of a rear support assembly for an automotive seat frame according to this utility model. Please refer to [link / reference]. Figures 1-4 This embodiment of a rear support assembly for an automobile seat frame includes a backrest frame 100. A mounting box 200 is fixed at the center of the upper end of the backrest frame 100. Guide rods 210 are slidably mounted on both sides inside the mounting box 200. A lifting plate 220 is fixedly connected to the bottom of the two guide rods 210. A first spring 230 is connected between the top of the lifting plate 220 and the top of the inner side of the mounting box 200. A lifting adjustment block 300 is provided on the lower part of one side of the backrest frame 100. A traction rope 400 is connected between the bottom of the lifting plate 220 and the lifting adjustment block 300. The traction rope 400 and the lifting plate 220 are moved up and down by adjusting the lifting adjustment block 300. A headrest holder 600 is also provided on the top of the guide rods 210.

[0024] Two first springs 230 are provided and located on both sides of the upper end of the lifting plate 220. Sliding sleeves 240, which slide vertically and horizontally with the guide rod 210, are also fixed on both sides of the upper end of the mounting box 200. With the cooperation of the sliding sleeves 240, the guide rod 210, the lifting plate 220 and the headrest move more linearly and smoothly when moving up and down. The lifting adjustment block 300 includes a box body 310 fixed longitudinally to the side of the frame 100, a plurality of positioning holes 3101 set in the height direction of the inner side of the box body 310, a slider 320 that slides vertically on the inner side of the box body 310 and extends one end to the outer side of the box body 310, a pin 330 that slides horizontally through the inside and both ends of the slider 320, a second spring 340 sleeved on the outer periphery of the pin 330 and located inside the box body 310, and a lever 350 fixed to the outer end of the pin 330; wherein, the end of the second spring 340 near the lever 350 is fixedly connected to the outer periphery of the pin 330. It is understood that the inner end of the pin 330 is inserted into the positioning hole 3101. The traction rope 400 is made of steel wire rope, and a guide tube 500 is sleeved on the outside of the traction rope 400 and fixed to the bottom of the frame 100 and the mounting box 200. The guide tube 500 guides the traction rope 400 and also provides protection. Specifically, when adjusting the headrest, the driver and passengers only need to remain seated and then use the lever 350 to pull the pin 330 outward and slide the slider 320 up and down. During this process, when the slider 320 is pulled upward, the traction rope 400 can be used to drive the lifting plate 220, guide rod 210 and headrest to move downward for adjustment. When the slider 320 and traction rope 400 move downward, the first spring 230 will automatically retract and drive the lifting plate 220, guide rod 210 and headrest to adjust upward. After the adjustment is completed, the pin 330 can be released, so that the pin 330 is inserted into the corresponding positioning hole 3101 inside the housing 310, thereby positioning and stabilizing the slider 320, traction rope 400 and headrest. The operation is simple and the structure is reasonably designed, so that the driver and passengers can adjust the height of the headrest without standing up or turning over.

[0025] Preferably, the headrest holder 600 further includes a mounting block 610 horizontally fixed to the upper end of the guide rod 210, an insertion hole 6101 located on one side of the mounting block 610 and extending upward, a sliding groove 6102 located inside the mounting block 610 and connected at one end to the insertion hole 6101, a sloped locking block 620 horizontally sliding inside the sliding groove 6102 and extending at one end to the inside of the insertion hole 6101, a third spring 630 with one end abutting against the inner end of the sliding groove 6102 and the other end abutting against the longitudinal end of the sloped locking block 620, and a finger pull block 640 fixed to one side of the sloped locking block 620 and passing through the outside of the mounting block 610; wherein, one side of the mounting block 610 also has a relief groove corresponding to the finger pull block 640. It is understandable that the existing headrest technology requires the internal threaded cylinder to be turned left and right during installation. Although the operation is convenient, the assembly efficiency is still relatively slow. Therefore, in this embodiment, during installation, the latch corresponding to the inclined plate 620 at the bottom of the headrest is inserted into the insertion hole 6101. After sliding sideways to push open the inclined plate 620, it can be fastened in the mounting block 610. When unlocking, the finger pull block 640 along with the inclined plate 620 is slid into the inner end of the slide groove 6102, so that the latch is released from the constraint of the inclined plate 620. The disassembly and assembly operation is faster and more convenient, and there is no loosening of the threads.

[0026] Furthermore, the mounting box 200 has an inspection port on one side and a corresponding maintenance cover 250. It is understood that the maintenance cover 250 and the mounting box 200 can be connected by a snap-fit, a threaded connection, etc., and there are no limitations on this. After opening the maintenance cover 250, it is convenient to inspect and maintain the internal components of the mounting box 200.

[0027] In summary, the rear support assembly for a car seat frame in this embodiment allows for headrest height adjustment. The driver and passengers simply remain seated and use the lever 350 to pull the pin 330 outwards and slide the slider 320 up and down. During this process, pulling the slider 320 upwards allows the traction rope 400 to move the lifting plate 220, guide rod 210, and headrest downwards for adjustment. Conversely, moving the slider 320 and traction rope 400 downwards causes the first spring 230 to automatically retract, adjusting the lifting plate 220, guide rod 210, and headrest upwards. After adjustment, the pin 330 can be released, allowing it to insert into the corresponding positioning hole 3101 inside the housing 310, thus securing the slider 320, traction rope 400, and headrest. The assembly is simple to operate and has a reasonable structural design, allowing the driver and passengers to adjust the headrest height without standing or turning over. Compared to existing technologies, this headrest adjustment is more stable and practical.

[0028] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A rear support assembly for an automobile seat frame, characterized in that, The backrest frame (100) includes a mounting box (200) fixed at the center of the upper end of the backrest frame (100). Guide rods (210) are slidably mounted on both sides inside the mounting box (200). A lifting plate (220) is fixedly connected to the bottom of the two guide rods (210). A first spring (230) is connected between the top of the lifting plate (220) and the top of the inner side of the mounting box (200). A lifting adjustment block (300) is provided on the lower part of one side of the backrest frame (100). A traction rope (400) is connected between the bottom of the lifting plate (220) and the lifting adjustment block (300). The traction rope (400) and the lifting plate (220) are moved up and down by adjusting the lifting adjustment block (300). A headrest holder (600) is also provided on the top of the guide rod (210).

2. The rear support assembly for an automobile seat frame according to claim 1, characterized in that: Two first springs (230) are provided and are located on the upper sides of the lifting plate (220) respectively. The upper sides of the mounting box (200) are also fixed with sliding sleeves (240) that slide up and down with the guide rod (210).

3. The rear support assembly for an automobile seat frame according to claim 1, characterized in that: The lifting adjustment block (300) includes a box body (310) fixed longitudinally to one side of the back frame (100), a plurality of positioning holes (3101) set along the height direction of the inner side of the box body (310), a slider (320) that slides up and down on the inner side of the box body (310) and extends to the outer side of the box body (310) at one end, a pin (330) that slides horizontally through the inside and both ends of the slider (320), a second spring (340) sleeved on the outer periphery of the pin (330) and located inside the box body (310), and a lever (350) fixed to the outer end of the pin (330). The second spring (340) is fixedly connected to the outer periphery of the pin (330) at one end near the lever (350).

4. The rear support assembly for an automobile seat frame according to claim 1, characterized in that: The traction rope (400) is made of steel wire rope, and the outer side of the traction rope (400) is also fitted with a guide tube (500) that is attached to the bottom of the frame (100) and the mounting box (200).

5. The rear support assembly for an automobile seat frame according to claim 1, characterized in that: The headrest holder (600) includes a mounting block (610) horizontally fixed to the upper end of the guide rod (210), an insertion hole (6101) located on one side of the mounting block (610) and extending upward, a sliding groove (6102) located inside the mounting block (610) and connected at one end to the insertion hole (6101), a sloped locking block (620) that slides horizontally inside the sliding groove (6102) and extends at one end to the inside of the insertion hole (6101), a third spring (630) that abuts at one end to the inner end of the sliding groove (6102) and at the other end to the longitudinal end of the sloped locking block (620), and a finger pull block (640) fixed to one side of the sloped locking block (620) and passing through the outside of the mounting block (610); The mounting block (610) also has a clearance groove on one side corresponding to the finger pull block (640).

6. The rear support assembly for an automobile seat frame according to claim 1, characterized in that: The mounting box (200) has an access port on one side and an access cover (250) corresponding to the access port.

Images