Seat back and method for manufacturing the same

Abstract

The present invention discloses a seat back and a manufacturing method thereof, belonging to the field of seats; it comprises a foam plastic frame, a metal insert is integrally formed on the foam plastic frame, and a limit assembly is integrally formed on both sides of the foam plastic frame, and the foam plastic assembly is rotationally connected with the flip assembly through the limit assembly; the metal insert comprises a headrest plug assembly and a seat belt limit assembly arranged at the top of the foam plastic frame, and a child seat fixing assembly embedded in the middle; the outer side of the foam plastic frame is coated with soft foam, and the outer side of the soft foam is coated with a skin assembly, and the present invention uses an embedded metal piece for integral foaming molding, so that the foam plastic and the metal insert are preferentially formed into a whole. The present invention reduces the weight of the product and improves the appearance quality of the product.

Description

Technical Field

[0001] The invention belongs to the field of seats, and in particular relates to a seat back and a manufacturing method thereof. Background Art

[0002] A seat back is a mechanism that provides back support for passengers and can be found in cars, trains, homes, cruise ships and even airplanes.

[0003] The existing seat backs are mainly made of metal frames, foams, and leathers, which have the disadvantages of being heavy and occupying too much space in the vehicle. Summary of the invention

[0004] The object of the present invention is to provide a seat back and a manufacturing method thereof, so as to solve the technical problems that the existing seat back is mainly made of metal frame, foam and skin, has a large weight and occupies too much space in the vehicle.

[0005] To achieve the above-mentioned purpose, the specific technical solutions of a seat back and a manufacturing method thereof of the present invention are as follows:

[0006] A seat back, comprising a foam plastic frame, a metal insert is integrally formed on the foam plastic frame, and limiting components are integrally formed on both sides of the foam plastic frame, and the foam plastic component is rotatably connected to a flip component through the limiting component;

[0007] The metal insert includes a headrest plug-in assembly and a seat belt limit assembly arranged at the top of the foam plastic frame, and a child seat fixing assembly embedded in the middle;

[0008] The outer side of the foam plastic frame is covered with soft foam, and the outer side of the soft foam is covered with a skin component.

[0009] Further, the limit assembly includes a connecting portion, and a driving portion fixedly connected to the bottom end of the connecting portion, and the flip assembly includes a reset block fixed on the driving portion, one end of the reset block is fixed with a reset spring, and the other end cooperates with the reset spring;

[0010] A driving rod is provided in the reset spring, and the driving rod passes through the limiting assembly and is engaged with the adjusting assembly.

[0011] Further, the adjustment assembly includes a rotating disk fixed at the bottom end of the limiting assembly, a positioning ring is sleeved on one end of the rotating disk away from the limiting assembly, a driving disk is fixed on the side of the positioning ring away from the rotating disk, and the driving disk is clamped with the rotating disk;

[0012] A driving block is arranged on a side of the driving disc away from the rotating disc, and both the driving block and the driving disc are clamped with the driving rod.

[0013] Furthermore, a mounting plate is clamped between the driving block and the driving disk, a buffer spring is arranged between the driving block and the mounting plate, and a direction in which the buffer spring recovers its deformation is the same as a direction in which the return spring recovers its deformation.

[0014] Furthermore, the foam plastic frame includes a four-part frame and a six-part frame, and a seat belt reel fixing component is integrally formed on the six-part frame.

[0015] Furthermore, the foam plastic skeleton is made of foamed polypropylene material.

[0016] The present invention also provides a method for manufacturing a seat back, comprising the following steps, and the following steps are performed in sequence:

[0017] Step S1: providing a frame, wherein the frame is integrally formed of foam plastic and metal inserts, preferably forming a whole as a supporting body of the seat back;

[0018] Step S2: placing the skeleton in step S1 in a forming mold, so that the soft foam is formed to wrap around the outside of the skeleton and fill the cavity between the skeletons;

[0019] Step S3: screwing and fixing the lower end of the frame to the flip assembly through the limit assembly;

[0020] Step S4: Wrap the decorative fabric skin assembly on the outside of the soft foam.

[0021] Furthermore, in step S2, the necessary exposed portion of the metal insert is shielded in the mold so that the portion to be exposed is not blocked by the foam plastic skeleton or can be easily removed from the metal insert.

[0022] A seat back and a manufacturing method thereof of the present invention have the following advantages:

[0023] 1. The present invention uses an embedded metal part for integrated foaming molding, so that the foam plastic and the metal insert are preferentially formed into a whole. The characteristic material of the foam plastic is EPP, which can replace part of the polyurethane foam material, thereby reducing the content of volatile organic compounds (VOC) in the product;

[0024] 2. One end of the flip mechanism of the present invention is fixedly connected to the frame, and the foam plastic and the metal insert are integrally formed, which has a compact structure, moderate hardness, and is convenient for assembly. As a preferred solution, if the foam plastic and the metal insert are integrally formed, the assembly process is simplified;

[0025] 3. The foam plastic selected in the present invention has good specific stiffness, and the preferred material is EPP, which can replace part of the metal. EPP has a cushioning property and can replace part of the foam, thereby reducing the product weight and improving the product appearance quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The figure is a schematic structural diagram of a seat backrest of the present invention.

[0027] Figure 2 The figure is a schematic structural diagram of a four-part frame of a seat back according to the present invention.

[0028] Figure 3 for Figure 2 A partial enlarged view at point A.

[0029] Figure 4 It is a partial enlarged view of a position limiting assembly and a flip assembly of a seat back according to the present invention.

[0030] Figure 5 The present invention is a schematic diagram of the disassembled structure of a limit assembly and a flip assembly of a seat back.

[0031] Explanation of marks in the figure: 1. Foam plastic frame; 101. Four-part frame; 102. Six-part frame; 2. Metal inlay; 201. Headrest plug-in assembly; 202. Safety belt limit assembly; 203. Child seat fixing assembly; 3. Limit assembly; 301. Connecting part; 302. Driving part; 4. Flipping assembly; 401. Reset spring; 402. Driving rod; 403. Adjusting assembly; 4031. Rotating disk; 4032. Positioning ring; 4033. Driving disk; 4034. Driving block; 404. Reset block; 5. Mounting plate; 6. Buffer spring; 7. Safety belt reel fixing assembly. DETAILED DESCRIPTION

[0032] In order to better understand the purpose, structure and function of the present invention, a seat back and a manufacturing method thereof of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0033] like Figure 1-Figure 5 As shown, a seat back comprises a foam plastic frame 1, a metal insert 2 is integrally formed on the foam plastic frame 1, and a limit assembly 3 is integrally formed on both sides of the foam plastic frame 1, and the foam plastic assembly is rotatably connected with a flip assembly 4 through the limit assembly 3. In the prior art, there are also inventions that mainly use a metal frame, and foam exists in the gap of the metal frame in the form of filling. The present invention uses EPP foam as a frame, and partially uses a metal insert 2 to meet the functional requirements;

[0034] The metal insert 2 includes a headrest plug-in component 201 and a seat belt stopper component 202 arranged at the top of the foam plastic skeleton 1, and a child seat fixing component 203 embedded in the middle. When the foaming process is carried out, the child seat fixing component 203 is fixed at a specified position so that it is integrally formed in the mold;

[0035] The outer side of the foam plastic skeleton 1 is coated with soft foam, and the outer side of the soft foam is coated with a skin component. The present invention uses expanded polypropylene EPP as a backrest skeleton to partially replace the traditional metal frame and backboard. The seat back in the prior art usually uses square steel as the skeleton. For the comfort of the seat, a thick soft material is wrapped on the outside, which will cause the seat back to be too thick and occupy the space in the car. The present invention uses a foam plastic skeleton 1, so there is no need for a thick soft material to wrap it. On the one hand, it can reduce the thickness of the backrest and increase the available space in the car; on the other hand, it can reduce the weight of the seat, thereby reducing vehicle fuel consumption and saving energy and reducing emissions.

[0036] In this embodiment, the position limiting assembly 3 includes a connecting portion 301 and a driving portion 302 fixedly connected to the bottom end of the connecting portion 301. The flipping assembly 4 includes a reset block 404 fixed to the driving portion 302. The reset block 404 has a reset spring 401 fixed at one end and cooperates with the reset spring 401 at the other end. A driving rod 402 is provided in the reset spring 401. The driving rod 402 penetrates the position limiting assembly 3 and is engaged with the adjusting assembly 403. The reset block 404 flips backward with the driving rod 402, so that the reset spring 401 is in a tensioned state. The adjusting assembly 403 is rotated to unlock the adjusting assembly 403 with the driving rod 402, and the reset spring 401 will naturally rebound forward. This reciprocating motion plays the role of flipping the seat back.

[0037] In this embodiment, the adjustment component 403 includes a rotating disk 4031 fixed at the bottom end of the limiting component 3, and a positioning ring 4032 is sleeved on one end of the rotating disk 4031 away from the limiting component 3. A driving disk 4033 is fixed on the side of the positioning ring 4032 away from the rotating disk 4031, and the driving disk 4033 is clamped with the rotating disk 4031;

[0038] A driving block 4034 is arranged on the side of the driving disk 4033 away from the rotating disk 4031, and both the driving block 4034 and the driving disk 4033 are engaged with the driving rod 402. When the seat back is flipped backward, the limiting assembly 3 rotates the rotating disk 4031 counterclockwise backward. When the rotating disk 4031 and the driving disk 4033 reach the limit position, they are locked in this position by engaging, which is the locking position of the backrest. When unlocking, the driving block 4034 drives the driving rod 402 to rotate backward, and the driving rod 402 drives the driving disk 4033 to rotate, and the driving disk 4033 will be disengaged from the rotating disk 4031. The rotating disk 4031 and the limiting assembly 3 recover their deformation through the reset spring 401 and return to the initial position, that is, the upright position of the backrest.

[0039] In this embodiment, a mounting plate 5 is clamped between the driving block 4034 and the driving disk 4033 , a buffer spring 6 is arranged between the driving block 4034 and the mounting plate 5 , and the direction in which the buffer spring 6 recovers its deformation is the same as the direction in which the return spring 401 recovers its deformation.

[0040] In this embodiment, the foam plastic frame 1 includes a four-part frame 101 and a six-part frame 102 , and a seat belt reel fixing assembly 7 is integrally formed on the six-part frame 102 .

[0041] Furthermore, the foam plastic skeleton 1 is made of expanded polypropylene material EPP or other high-strength foam plastics.

[0042] A method for manufacturing a seat back comprises the following steps, which are performed in sequence:

[0043] Step S1: providing a frame, wherein the frame is integrally formed of foam plastic and a metal insert 2, preferably forming a whole as a supporting body of the seat back;

[0044] Step S2: placing the skeleton in step S1 in a forming mold, so that the soft foam is formed to wrap around the outside of the skeleton and fill the cavity between the skeletons;

[0045] Step S3: screwing and fixing the lower end of the frame with the turning assembly 4 through the limiting assembly 3;

[0046] Step S4: Wrap the decorative fabric skin assembly on the outside of the soft foam.

[0047] In this embodiment, in step S2 , the necessary exposed portion of the metal insert 2 is shielded in the mold so that the portion that needs to be exposed is not blocked by the foam plastic skeleton 1 or can be easily removed from the metal insert 2 .

[0048] Working principle:

[0049] The foam plastic skeleton 1 and the metal insert 2 are combined together by using a foaming process. The characteristic material of the foam plastic skeleton 1 is EPP foam. The EPP foam has good rigidity and buffering properties, and can replace part of the foam to reduce the weight of the product.

[0050] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A method for manufacturing a seat back, characterized in that: The following steps are included: And the following steps are performed in sequence: Step S1: providing a frame, wherein the frame is integrally formed of foam plastic and a metal insert (2), preferably forming an integral body as a supporting body of the seat back; Step S2: placing the frame in step S1 in a forming mold, so that the soft foam is formed to wrap around the outside of the frame and fill the cavity between the frames; Step S3: screwing and fixing the lower end of the frame to the flip assembly (4) via the limiting assembly (3); Step S4: Wrap the decorative fabric skin component on the outside of the soft foam; The seat back comprises a foam plastic frame (1), a metal insert (2) is integrally formed on the foam plastic frame (1), limiting components (3) are integrally formed on both sides of the foam plastic frame (1), and the foam plastic component is rotatably connected to the flip component (4) via the limiting component (3); The metal insert (2) comprises a headrest plug-in assembly (201) and a seat belt limit assembly (202) arranged at the top end of the foam plastic frame (1), and a child seat fixing assembly (203) embedded in the middle; The limit assembly (3) comprises a connecting portion (301) and a driving portion (302) fixedly connected to the bottom end of the connecting portion (301); the flip assembly (4) comprises a reset block (404) fixed to the driving portion (302); one end of the reset block (404) is fixed to a reset spring (401), and the other end cooperates with the reset spring (401); A driving rod (402) is provided in the return spring (401), and the driving rod (402) passes through the limiting component (3) and is engaged with the adjusting component (403); The adjustment component (403) comprises a rotating disk (4031) fixed at the bottom end of the limiting component (3); a positioning ring (4032) is sleeved on one end of the rotating disk (4031) away from the limiting component (3); a driving disk (4033) is fixed on the side of the positioning ring (4032) away from the rotating disk (4031), and the driving disk (4033) is clamped with the rotating disk (4031); A driving block (4034) is arranged on a side of the driving disk (4033) away from the rotating disk (4031), and both the driving block (4034) and the driving disk (4033) are clamped with the driving rod (402); a mounting plate (5) is clamped between the driving block (4034) and the driving disk (4033), a buffer spring (6) is arranged between the driving block (4034) and the mounting plate (5), and a direction in which the buffer spring (6) recovers its deformation is the same as a direction in which the return spring (401) recovers its deformation; The outer side of the foam plastic skeleton (1) is coated with soft foam, and the outer side of the soft foam is coated with a skin component.

2. The method for manufacturing a seat back according to claim 1, characterized in that: The foam plastic skeleton (1) comprises a four-part skeleton (101) and a six-part skeleton (102), and a seat belt reel fixing component (7) is integrally formed on the six-part skeleton (102).

3. The method for manufacturing a seat back according to claim 1, characterized in that: The foam plastic skeleton (1) is made of foamed polypropylene material.

4. The method for manufacturing a seat back according to claim 1, characterized in that: In step S2, the exposed portion of the metal insert (2) is shielded in the mold so that the portion that needs to be exposed is not blocked by the foam plastic skeleton (1) or can be easily removed from the metal insert (2).

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