Automotive seat back recliner assembly with injection molding assembly

Abstract

The application relates to a car seat backrest recovery assembly with an injection molding assembly and belongs to the technical field of car seats, which solves the problems of high development and manufacturing cost and low efficiency in the existing processing and manufacturing process, and comprises a torsion bar, the torsion bar comprises a torsion shaft, a fixed shaft which is bent at one end of the torsion shaft and a rotating shaft which is bent at the other end of the torsion bar, and the fixed shaft and the rotating shaft are oppositely arranged in the bending directions; a connecting piece for being connected to a car seat framework is injection molded on the torsion shaft, and the torsion shaft can rotate relative to the connecting piece; the car seat backrest recovery assembly has the effects of not needing additional welding, riveting or assembling processes, greatly simplifying the production process, improving the production efficiency and saving the cost.

Description

Technical Field

[0001] This invention belongs to the field of automotive seat technology, specifically relating to an automotive seat backrest recovery assembly with an injection-molded assembly. Background Technology

[0002] Existing torsion bars are assembled from multiple independent components, such as the torsion bar body, fixed sheet metal stamping parts, and post-installed end plastic parts. During the manufacturing process, it is necessary to first develop sheet metal molds to process sheet metal stamping parts and plastic molds. When assembling the components together, it is necessary to use a press-fitting mold to press the sheet metal stamping parts onto the torsion bar body. The entire manufacturing process is costly, time-consuming, and inefficient. Summary of the Invention

[0003] The purpose of this invention is to provide an automotive seat backrest recovery assembly with an injection-molded assembly, which solves the problems of high development and manufacturing costs and low efficiency in existing processing and manufacturing processes.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: This invention provides a car seat backrest return assembly with an injection-molded assembly, including a torsion bar. The torsion bar includes a torsion shaft, a fixed shaft bent at one end of the torsion shaft, and a rotating shaft bent at the other end of the torsion shaft. The fixed shaft and the rotating shaft are bent in opposite directions. The injection-molded assembly includes a connector, which is injection-molded onto the torsion shaft for connection to the car seat frame. The torsion shaft is rotatable relative to the connector.

[0005] In one embodiment, the injection-molded assembly further includes a fixed end, which is injection-molded at the end of the fixed shaft.

[0006] In one embodiment, the injection-molded assembly further includes a rotating bushing, which is injection-molded around the outer surface of the rotating shaft.

[0007] In one embodiment, the connector is provided with at least one connecting hole, and a fixing bolt for fixed connection with the car backrest frame is provided in the connecting hole.

[0008] In one embodiment, two connectors are provided, and they are respectively located at both ends of the torsion shaft in the axial direction.

[0009] In one embodiment, the torque shaft is a linear shaft, and the fixed shaft, the rotating shaft, and the torque shaft are integrally formed together.

[0010] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: The present invention provides an automotive seat backrest return assembly with an injection-molded assembly. While achieving the backrest return function, it directly forms the connecting parts, fixed ends, and rotating bushings onto the torsion bar through injection molding, eliminating the need for additional welding, riveting, or assembly processes. This greatly simplifies the production process, improves production efficiency, and saves costs. Furthermore, the subsequent assembly of this return torsion bar onto the automotive seat frame is simple, convenient, and saves time and effort. Attached Figure Description

[0011] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention; Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0012] The reference numerals in the attached figures are explained as follows: 1. Torsion bar; 11. Torsion shaft; 12. Fixed shaft; 13. Rotating shaft; 2. Connecting parts; 21. Connecting holes; 4. Fix the end; 5. Rotate the bushing. Detailed Implementation

[0013] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0016] refer to Figure 1 and Figure 2 This invention provides a car seat backrest return assembly with an injection-molded assembly, mainly used for the backrest reset of car seats; it includes a torsion bar 1, which includes a torsion shaft 11, a fixed shaft 12 bent at one end of the torsion shaft 11, and a rotating shaft 13 bent at the other end of the torsion shaft 11. The torsion shaft 11 is an L-shaped shaft, and one end of the fixed shaft 12 is connected to the end of the short rod portion of the torsion shaft 11. The fixed shaft 12 and the rotating shaft 13 are bent in opposite directions, so that a stable restoring torque can be generated when the torsion shaft is twisted. In order to improve the overall strength of the torsion bar 1, the fixed shaft 12, the rotating shaft 13 and the torsion shaft 11 are integrally formed.

[0017] refer to Figure 1 and Figure 2 The injection-molded assembly includes a connector 2, a fixed end 4, and a rotating bushing 5. The connector 2 is made of engineering plastic and is injection molded onto the outer circumference of the torque shaft 11. In this application, there are two connectors 2, which are located at the two ends of the torque shaft 11 in the axial direction. Each connector 2 has a connecting hole 21, which is a through hole for installing a fixing bolt. The fixing bolt passes through the connecting hole 21 and is screwed into the connecting hole on the car seat frame and locked with a nut, thereby fixing the connector 2 to the seat frame. The torque shaft 11 and the connector 2 are rotatably fitted, that is, the torque shaft can rotate freely in the injection-molded hole of the connector 2, while the connector 2 itself is kept relatively stationary with the seat frame by the fixing bolt 3.

[0018] refer to Figure 1 and Figure 2 The fixed end 4 is also injection molded onto the end of the fixed shaft 12. The fixed end 4 covers the end of the fixed shaft 12. The outer surface of the rotating shaft 13 is wrapped with a rotating bushing 5 by injection molding. The rotating bushing 5 is made of a plastic material with a certain elasticity. In this application, by injection molding the plastic fixed end 3 onto the fixed shaft 12 and the plastic rotating bushing 5 onto the rotating shaft 12, when the torsion bar 1 with this structure is assembled onto the car seat frame, compared with the existing sheet metal torsion bar 1 directly connected to the car seat frame (e.g., the sheet metal fixed shaft 12 is installed on the car seat frame, or the sheet metal rotating shaft 13 is in direct contact with the push shaft on the car seat frame), friction noise can be reduced.

[0019] refer to Figure 1 and Figure 2 The automotive seat backrest return assembly with injection-molded assembly of this application has the following advantages: I. Significantly reduce processing time and improve production efficiency. The processing flow of this application is as follows: the formed torque shaft 1 is placed directly in the injection mold, and the connector 2, the fixed end 4 and the rotating bushing 5 are directly injection molded into the corresponding positions of the torque shaft 1 through the injection mold. The processing time of the whole process is 2.1 hours. The existing processing flow is as follows: first, the sheet metal connector, fixed end 4, and rotating bushing 5 are respectively processed into shape using corresponding processing equipment; then, the formed sheet metal connector, fixed end 4, and rotating bushing 5 are assembled onto the torque shaft 1. In this existing process, the processing time for the sheet metal connector is 1.05 hours, the processing time for the fixed end 4 and rotating bushing 5 is 1.26 hours, and the assembly process takes 15.54 hours. Therefore, the existing processing time is approximately 17.85 hours. It can be seen that this application, by directly forming the connector 2, fixed end 4, and rotating bushing 5 onto the torque bar 1 using injection molding, eliminates the need for additional welding, riveting, or assembly processes, greatly simplifying the production process. Compared to the existing structure, the processing time can be shortened by at least 15 hours, improving production efficiency. Second, when assembling the recovery torsion bar of this structure onto the car seat frame, the operation is simple, convenient, time-saving, and labor-saving. Third, since the connecting piece 2 and the torsion shaft 11 are rotatably fitted, it ensures that the torsion bar 1 can generate torsional restoring force normally, and the torsion bar 1 can be stably supported on the seat frame through the connecting piece 2.

[0020] IV. The recovery component of this structure has good fatigue resistance. Fatigue resistance test method: Install the product on the test equipment according to the requirements, set the fatigue stroke to 0-54°, ​​fatigue frequency ≤1HZ, and perform 15,000 fatigue cycles. The force value attenuation is ≤15%.

[0021] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A car seat backrest return assembly with an injection-molded assembly, characterized in that, The assembly includes a torsion bar (1), which includes a torsion shaft (11), a fixed shaft (12) bent at one end of the torsion shaft (11), and a rotating shaft (13) bent at the other end of the torsion shaft (11). The fixed shaft (12) and the rotating shaft (13) are bent in opposite directions. The injection-molded assembly includes a connector (2), which is injection-molded on the torsion shaft (1) for connection with the car seat frame. The torsion shaft (11) is rotatable relative to the connector (2).

2. The automotive seat backrest return assembly with injection-molded assembly according to claim 1, characterized in that, The injection molding assembly also includes a fixed end (4), which is injection molded at the end of the fixed shaft (12).

3. The automotive seat backrest recovery assembly with injection-molded assembly according to claim 1 or 2, characterized in that, The injection-molded assembly also includes a rotating bushing (5), which is injection-molded around the outer surface of the rotating shaft (13).

4. The automotive seat backrest return assembly with injection-molded assembly according to claim 3, characterized in that, The connector (2) is provided with at least one connection hole (21), and a fixing bolt for fixing connection with the car backrest frame is provided in the connection hole (21).

5. The automotive seat backrest return assembly with injection-molded assembly according to claim 4, characterized in that, Two connectors (2) are provided, and they are respectively located at both ends of the torsion shaft (11) in the axial direction.

6. The automotive seat backrest recovery assembly with injection-molded assembly according to claim 1, characterized in that, The torsion shaft (11) is a linear shaft, and the fixed shaft (12), the rotating shaft (13) and the torsion shaft (11) are integrally formed.

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