Front seat headrest device and assembling method thereof

Abstract

The invention discloses a front seat headrest device and an assembling method thereof, and relates to the technical field of automobile seats, the front seat headrest device comprises a seat framework and a headrest, a supporting rod is arranged on the headrest, a mounting seat is arranged on the seat framework, a rotating seat is hinged to the mounting seat, the rotating seat is connected with the supporting rod, and the rotating seat is connected with the supporting rod. And the rotating seat is connected with the seat framework through an elastic component. When an automobile is suddenly braked or collided and the head of a passenger in the back row collides with the headrest, the headrest rotates forwards by a certain angle under the support of the rotating seat, the rotating angle of the headrest is limited through the elastic force effect of the elastic assembly, and then the headrest of the front seat can reduce impact on the head of the passenger in the back row and protect the passenger in the back row. And after the headrest rotates forwards, the headrest can return, follow-up use of front-row passengers is not affected, the headrest continues to protect the front-row passengers, the whole device can be repeatedly used, the structure is relatively simple, and practicability is higher.

Description

Technical Field

[0001] This invention relates to the field of automotive seat technology, and more particularly to a front seat headrest device and its assembly method. Background Technology

[0002] With the surge in car ownership, road traffic accidents are on the rise year by year, and vehicle safety is receiving increasing attention. Seats are crucial components for ensuring occupant safety. In the event of a traffic accident, car seats, along with seat belts and airbags, work together to reduce the severity of injuries. The main components of a car seat include the headrest, seat frame, backrest frame, rails, upholstery, foam, adjuster, and motor. The headrest is a vital part of the car seat structure and plays a key role in its collision safety.

[0003] Current seat headrests primarily protect the occupant's own body. In a rear-end collision, the occupant's torso accelerates forward with the vehicle, while the head lags behind due to inertia, potentially causing a whiplash injury where the head rotates backward around the neck. The headrest reduces this relative movement of the occupant's head and neck. However, current headrest designs often neglect the protection of occupants in other positions. Rear passengers have fewer restraint systems, lacking airbags, and rely mainly on seat belts and rear seats to restrain them and reduce injury. However, when rear space is limited, larger occupants are more likely to experience a secondary impact with the front seat headrest during a collision. If the front seat is too strong, it can significantly increase head injuries to rear passengers in a collision.

[0004] For example, CN103192749B, published on July 15, 2015, discloses an active headrest device for automobile seats. The entire device consists of a headrest, seat frame, sliding shaft, rotating hook, bracket, lower support plate, trigger spring, spring, upper support plate, headrest support rod, slide rail, bolts, sliding shaft end cap, pin, U-shaped connector, and guide sleeve. The headrest support rod is securely connected to the headrest and sliding shaft hole, and can slide along the guide sleeve. The slide rail has an arc-shaped structure and is fixed to the upper support plate by bolts. The trigger spring has an arc-shaped structure and is connected to the rotating hook via the U-shaped connector and pin. However, the aforementioned headrest, when in use, cannot protect the necks of occupants in the rear seats during sudden braking or a collision, resulting in poor practicality. Summary of the Invention

[0005] The purpose of this invention is to provide a front seat headrest device and its assembly method for protecting the necks of rear passengers. This invention utilizes an elastic component positioned between the seat frame and the headrest to cushion the impact, thereby enabling the front seat headrest to protect the heads of rear passengers during a collision, thus enhancing its practicality.

[0006] To achieve the above objectives, the technical solution adopted by the present invention to solve its technical problem is: a front seat headrest device, including a seat frame and a headrest, wherein a support rod is provided on the headrest, a mounting seat is provided on the seat frame, a rotating seat is hinged on the mounting seat, the rotating seat is connected to the support rod, and the rotating seat is connected to the seat frame through an elastic component.

[0007] The elastic component includes a spring and two fixing blocks. The two fixing blocks are respectively connected to the seat frame and the rotating seat, and the two ends of the spring are respectively connected to the two fixing blocks.

[0008] The spring has hooks at both ends, and the fixing block has through holes. The hooks are connected to the through holes on the fixing block.

[0009] The mounting base is provided with a side seat, which is connected to the rotating base through a pin assembly. The side seat is also provided with an obliquely arranged limiting plate, which abuts against the oblique tube.

[0010] The rotating seat includes a straight tube and an inclined tube connected to each other, with an angle between the straight tube and the inclined tube. The straight tube is connected to a support rod, and the inclined tube is connected to a side seat through a pin assembly.

[0011] The mounting base is provided with a clearance hole, and the mounting base is provided with two oppositely arranged side seats. One end of the inclined tube passes through the clearance hole and extends between the two side seats.

[0012] The pin assembly includes a pin, a limiting block, bushings, and a locking nut. The pin is fixedly connected to the limiting block, passes through the side seat and the inclined tube, and is threadedly connected to the locking nut. The two bushings are respectively sleeved on both ends of the pin and abut against the two side seats respectively.

[0013] The straight pipe has a U-shaped cross-section and a U-shaped groove inside. The support rod fits into the U-shaped groove, and the groove wall of the U-shaped groove is connected to the support rod.

[0014] The support rod is connected to the straight pipe by a locking bolt. The support rod is provided with a projection weld nut, and the straight pipe is provided with an adjustment hole for the locking bolt to pass through.

[0015] An assembly method for a front seat headrest device as described above includes the following steps:

[0016] Step 1: Weld the mounting base to the seat frame;

[0017] Step 2: Weld the two fixing blocks to the seat frame and the rotating seat respectively;

[0018] Step 3: Connect the headrest to the support rod, and connect the support rod to the rotating seat;

[0019] Step 4: Move the rotating seat so that the inclined tube of the rotating seat passes through the clearance hole of the mounting seat and extends between the two side seats. Place the bushing on the pin, pass the pin through the side seats and the inclined tube, and connect the threaded end of the pin to the lock nut.

[0020] Step 5: Move the spring and connect the hooks at both ends of the spring to the through holes of the two fixing blocks respectively.

[0021] The beneficial effects of this invention are:

[0022] When a car brakes suddenly or collides, if a rear passenger's head hits the headrest, the headrest, supported by a rotating seat on the seat frame, rotates forward at a certain angle. The elastic component limits the rotation angle of the headrest, thus reducing the impact on the rear passenger's head and protecting them. After rotating forward, the headrest can return to its original position without affecting the use of the front passenger, continuing to protect them. The entire device is reusable, has a relatively simple structure, and is highly practical. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the front seat headrest device of the present invention.

[0024] Figure 2 for Figure 1 A partial structural diagram.

[0025] Figure 3 for Figure 1 A schematic diagram of the connection structure of the mounting base, rotating base, and elastic component.

[0026] Figure 4 for Figure 3 A side view structural diagram.

[0027] Figure 5 for Figure 3 The front view.

[0028] Figure 6 for Figure 1 A schematic diagram of the pin assembly structure.

[0029] Figure 7 for Figure 1 A partial sectional view of the connection between the locking bolts, support rods, and rotating seat.

[0030] In the attached diagram: 1-seat frame, 2-headrest, 3-support rod, 4-mounting base, 5-rotating base, 501-straight tube, 502-slanted tube, 6-spring, 7-fixing block, 8-hook, 9-through hole, 10-side seat, 11-pin assembly, 1101-pin, 1102-limiting block, 1103-bushing, 1104-locking nut, 12-clearance hole, 13-locking bolt, 14-welded nut, 15-adjustment hole, 16-limiting plate. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0032] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0033] like Figure 1-7 As shown, the front seat headrest device includes a seat frame 1 and a headrest 2. The headrest 2 is provided with a support rod 3, and the seat frame 1 is provided with a mounting seat 4. A rotating seat 5 is hinged to the mounting seat 4. The rotating seat 5 is connected to the support rod 3 and is connected to the seat frame 1 through an elastic component. After the rotating seat 5 is hinged to the mounting seat 4, it can only rotate forward under the limiting action of the mounting seat 4. The elastic component enables the headrest 2, support rod 3 and rotating seat 5 to return to their original position after rotation. The elastic component also buffers the headrest 2 after it receives an external impact. In this embodiment, the mounting seat 4 is directly welded to the seat frame 1, and the headrest 2 is provided with two support rods 3. The seat frame 1 is provided with two mounting seats 4, and each mounting seat 4 is connected to the support rod 3 through two rotating seats 5. There are also two sets of elastic components to ensure the stable installation of the headrest 2 on the seat frame 1.

[0034] Specifically, when the front seat moves with the car, the head of the front passenger is supported by the headrest 2. When the car brakes suddenly or collides, and the head of the rear passenger hits the headrest 2, the headrest 2 rotates forward at a certain angle on the rotating seat 5 supported on the seat frame 1. The rotation angle of the headrest 2 is limited by the elastic force of the elastic component. Thus, the headrest 2 of the front seat can reduce the impact on the head of the rear passenger and protect the rear passenger. After rotating forward, the headrest 2 can return to its original position without affecting the use of the front passenger and continue to protect the front passenger. The entire device is reusable and has a relatively simple structure, making it more practical.

[0035] Reference Figure 3The elastic component includes a spring 6 and two fixing blocks 7. The two fixing blocks 7 are respectively connected to the seat frame 1 and the rotating seat 5. The two ends of the spring 6 are respectively connected to the two fixing blocks 7. When the headrest 2 receives external force, the support rod 3 drives the rotating seat 5 to rotate on the mounting seat 4. At this time, the spring 6 is stretched. The elastic action of the spring 6 buffers the rotating seat 5 and the headrest 2, thereby protecting the rear passengers. Specifically, the two fixing blocks 7 are welded to the seat frame 1 and the rotating seat 5 respectively.

[0036] Specifically, each end of the spring 6 is provided with a hook 8, and the fixing block 7 is provided with a through hole 9. The hook 8 is connected to the through hole 9 on the fixing block 7. The spring 6 and the two fixing blocks 7 can be easily disassembled and assembled through the cooperation of the hook 8 and the through hole 9, so that the spring 6 can be replaced when it is damaged after long-term use. The replacement of the spring 6 is convenient and quick and easy to use. Specifically, the springs 6 connected to the two rotating seats 5 are arranged in parallel to each other, so as to ensure that the spring 6 stably buffers and protects the headrest 2.

[0037] Reference Figure 4 The mounting base 4 is provided with a side seat 10, which is connected to the rotating base 5 through a pin assembly 11. The side seat 10 is provided to achieve a stable connection between the rotating base 5 and the mounting base 4. Specifically, both the rotating base 5 and the side seat 10 are provided with through holes that are connected to the pin assembly 11. The side seat 10 is also provided with an obliquely set limiting plate 16, which abuts against the oblique tube 502. The setting of the limiting plate 16 limits the rotating base 5, thereby ensuring that the rotating base 5 is tightly attached to the limiting plate 16 under the elastic force of the spring 6, and thus ensuring that the headrest 2 connected to the rotating base 5 remains fixed when supporting the head of the occupant on the front seat.

[0038] Specifically, the rotating seat 5 includes a straight tube 501 and an inclined tube 502 connected to each other. The straight tube 501 and the inclined tube 502 are at an angle. The straight tube 501 is connected to the support rod 3, and the inclined tube 502 is connected to the side seat 10 through the pin assembly 11. The straight tube 501 increases the contact area between the rotating seat 5 and the support rod 3, thereby achieving a stable connection between the rotating seat 5 and the support rod 3. The inclined tube 502 facilitates the hinged connection between the rotating seat 5 and the side seat 10, ensuring that the support rod 3 connected to the straight tube 501 is in a vertical state, thereby ensuring that the headrest 2 connected to the support rod 3 stably supports the head of the occupant on the seat. Specifically, the straight tube 501 and the inclined tube 502 are integrally stamped.

[0039] Reference Figure 3-5The mounting base 4 is provided with a clearance hole 12 and two oppositely arranged side seats 10. One end of the inclined tube 502 passes through the clearance hole 12 and extends between the two side seats 10. The side seats 10 and the support rod 3 are respectively arranged on both sides of the mounting base 4, so that after the inclined tube 502 of the rotating seat 5 extends from one side of the support rod 3 to one side of the side seat 10, the inclined tube 502, with the cooperation of the limiting plate 16 and the side seat 10, realizes the limitation of the rotating seat 5, thereby ensuring that the rotating seat 5 can only rotate forward, thereby ensuring that the headrest 2 on the support rod 3 stably supports the occupants in the front seats and protects the occupants in the rear seats. Specifically, the side seats 10, the limiting plate 16 and the mounting plate 4 are integrally stamped.

[0040] The pin assembly 11 includes a pin 1101, a limiting block 1102, bushings 1103, and a locking nut 1104. The pin 1101 is fixedly connected to the limiting block 1102. The pin 1101 passes through the side seat 10 and the inclined tube 502. The pin 1101 is threadedly connected to the locking nut 1104. Two bushings 1103 are respectively fitted onto both ends of the pin 1101 and abut against the two side seats 10. The pin 1101 enables the hinged connection between the inclined tube 502 and the side seat 10. Specifically, one end of the pin 1101 is welded to the limiting block 1102, and the other end of the pin 1101 is threaded. The inclined tube 502 and the side seat 10 are both equipped with pins 1101. During installation, the pin 1101 is inserted through a through hole. One end of the pin 1101 is fitted with a bushing 1103. Then, the pin 1101 is passed through the through hole in the inclined tube 502 and the side seat 10. Another bushing 1103 is fitted onto the threaded end of the pin 1101. The locking nut 1104 is installed on the pin 1101. The locking nut 1104 is rotated until the two bushings 1103 abut against the side seat 10, thereby achieving the connection between the rotating seat 5 and the mounting seat 4. In this embodiment, the limiting block 1102 has a rectangular cross-section, which limits the installation of the pin 1101 on the side seat 10, thereby ensuring that the rotating seat 5 can rotate relative to the mounting seat 4.

[0041] The straight tube 501 has a U-shaped cross-section and a U-shaped groove. The support rod 3 fits into the U-shaped groove, and the groove wall of the U-shaped groove is connected to the support rod 3. The U-shaped groove is used to achieve a stable connection of the support rod 3. In this embodiment, the support rod 3 has a rectangular cross-section. The U-shaped groove contacts the three surfaces of the rectangular support rod 3, so that the straight tube 501 is not easy to shake after it is connected to the support rod 3, thereby achieving a stable installation of the headrest 2.

[0042] Reference Figure 7The support rod 3 is connected to the straight tube 501 via a locking bolt 13. The support rod 3 is equipped with a projection-welded nut 14, and the straight tube 501 has an adjustment hole 15 through which the locking bolt 13 passes. The locking bolt 13 passes through the adjustment hole 15 and connects to the projection-welded nut 14, thus achieving the connection between the support rod 3 and the straight tube 501. By adjusting the locking bolt 13 at different positions in the adjustment hole 15 on the straight tube 501, the relative position of the support rod 3 and the straight tube 501 can be adjusted, thereby allowing the headrest 2 to be positioned correctly when seated. The headrest 2 is positioned on the chair frame 1 to support occupants of different body types. The projection weld nut 14 is welded to the support rod 3, and one end of the locking bolt 13 extends through the projection weld nut 14 into the support rod 3. The internal space of the support rod 3 accommodates the locking bolt 13, ensuring stable connection. In another embodiment, the straight tube 501 is directly welded to the support rod 3, allowing for quick installation of the headrest 2 on the rotating seat 5, reducing the number of components in the entire device and lowering production costs.

[0043] An assembly method for a front seat headrest device as described above includes the following steps:

[0044] Step 1: Weld the mounting base 4 to the seat frame 1;

[0045] Step 2: Weld the two fixing blocks 7 to the seat frame 1 and the rotating seat 5 respectively;

[0046] Step 3: Connect the headrest 2 to the support rod 3, and connect the support rod 3 to the rotating seat 5;

[0047] Step 4: Move the rotating seat 5 so that the inclined tube 502 of the rotating seat 5 passes through the clearance hole 12 of the mounting seat 4 and extends between the two side seats 10. The bushing 103 is fitted onto the pin 1101. The pin 1101 is passed through the side seat 10 and the inclined tube 502. The threaded end of the pin 1101 is connected to the locking nut 1104.

[0048] Step 5: Move the spring 6 and connect the hooks 8 at both ends of the spring 6 to the through holes 9 of the two fixing blocks 7 respectively.

[0049] The assembly process of the entire headrest device is simple, and the structure of the entire device is simple, which reduces the assembly time of the headrest 2 and the seat frame 1.

[0050] In summary, when the front seat moves with the car, the spring 6 pulls the rotating seat 5, causing the inclined tube 501 of the rotating seat 5 to fit tightly against the limiting plate 16 on the mounting seat 4. The limiting plate 16, the side seat 10, and the clearance hole 12 of the mounting seat 4 limit the rotating seat 5, thereby fixing the headrest 2. The head of the front seat occupant is supported by the headrest 2. When the car brakes suddenly or collides, the head of the rear seat occupant hits the headrest 2. The headrest 2 rotates forward at a certain angle under the support of the rotating seat 5. The spring force of the spring 6 limits the rotation angle of the headrest 2, thus reducing the impact on the head of the rear seat occupant and protecting the rear seat occupant. After the headrest 2 rotates forward, it can return to its original position by the spring force of the spring 6, without affecting the use of the front seat occupant, and continues to support and protect the head of the front seat occupant.

[0051] 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, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A front seat headrest arrangement comprising a seat framework (1) and a headrest (2), characterized in that, The headrest (2) is provided with a support rod (3), the seat framework (1) is provided with a mounting seat (4), the mounting seat (4) is hingedly connected with a rotating seat (5), the rotating seat (5) is connected with the support rod (3), and the rotating seat (5) is connected with the seat framework (1) through an elastic assembly.

2. A front seat headrest arrangement according to claim 1, characterized in that The elastic assembly comprises springs (6) and fixed blocks (7), the two fixed blocks (7) are connected with the seat framework (1) and the rotating seat (5) respectively, and the two ends of the spring (6) are connected with the two fixed blocks (7) respectively.

3. A front seat headrest arrangement according to claim 2, characterized in that The two ends of the spring (6) are respectively provided with hooks (8), the fixed block (7) is provided with a through hole (9), and the hook (8) is connected with the through hole (9) of the fixed block (7).

4. A front seat headrest arrangement according to claim 1, characterized in that The mounting seat (4) is provided with a side seat (10), the side seat (10) is connected with the rotating seat (5) through a pin shaft assembly (11), and the side seat (10) is further provided with a limiting plate (16) arranged obliquely, and the limiting plate (16) abuts against the inclined pipe (502).

5. A front seat headrest arrangement according to claim 4, characterized in that The rotating seat (5) comprises a straight pipe (501) and an inclined pipe (502) connected with each other, an angle is arranged between the straight pipe (501) and the inclined pipe (502), the straight pipe (501) is connected with the support rod (3), and the inclined pipe (502) is connected with the side seat (10) through the pin shaft assembly (11).

6. A front seat headrest arrangement according to claim 5, characterized in that The mounting seat (4) is provided with an avoiding hole (12), the mounting seat (4) is provided with two oppositely arranged side seats (10), one end of the inclined pipe (502) penetrates through the avoiding hole (12) and extends between the two side seats (10).

7. A front seat headrest arrangement according to claim 6, characterized in that The pin shaft assembly (11) comprises a pin shaft (1101), a limiting block (1102), a bushing (1103) and a locking nut (1104), the pin shaft (1101) is fixedly connected with the limiting block (1102), the pin shaft (1101) penetrates through the side seat (10) and the inclined pipe (502), the pin shaft (1101) is threadedly connected with the locking nut (1104), the two bushings (1103) are respectively sleeved on the two ends of the pin shaft (1101), and the two bushings (1103) respectively abut against the two side seats (10).

8. A front seat headrest arrangement according to claim 5, characterized in that The cross section of the straight pipe (501) is U-shaped, a U-shaped groove is arranged in the straight pipe (501), the support rod (3) is attached to the U-shaped groove, and the groove wall of the U-shaped groove is connected with the support rod (3).

9. A front seat headrest arrangement according to claim 8, characterized in that The support rod (3) is connected with the straight pipe (501) through a locking bolt (13), the support rod (3) is provided with a projection welding nut (14), and the straight pipe (501) is provided with an adjusting hole (15) through which the locking bolt (13) penetrates.

10. A method of assembling a front seat headrest arrangement according to any one of claims 1-9, characterized in that, The specific steps include: Step one, welding the mounting seat (4) with the seat framework (1); Step two, welding the two fixed blocks (7) with the seat framework (1) and the rotating seat (5) respectively; Step three, connecting the headrest (2) with the support rod (3) and connecting the support rod (3) with the rotating seat (5); Step four, move the rotating seat (5) to pass the inclined pipe (502) of the rotating seat (5) through the avoiding hole (12) of the mounting seat (4) and extend to between the two side seats (10), the bushing (103) is sleeved on the pin shaft (1101), the pin shaft (1101) is passed through the side seat (10), the inclined pipe (502), and the end provided with the screw thread of the pin shaft (1101) is connected with the lock nut (1104), Step five, move the spring (6), and connect the hooks (8) at two ends of the spring (6) with the through holes (9) of the two fixed blocks (7) respectively.

Images