Electric adjusting type seat backrest

Abstract

The utility model relates to the technical field of automobile seats, and discloses an electric adjusting type seat backrest which comprises a base, a backrest body is arranged on the upper surface of the base, a U-shaped seat is fixedly connected to the inner wall of the base, a motor is fixedly connected to the inner wall of the U-shaped seat, a worm is fixedly arranged at the output end of the motor, and the worm is fixedly connected with the base. The gear end of the worm is connected with a worm wheel in a meshed mode, a transmission frame is fixedly connected to the interior of the worm wheel, a first gear is fixedly connected to the outer wall of the transmission frame, the gear end of the first gear is connected with a second gear in a meshed mode, the gear end of the second gear is connected with a gear ring in a meshed mode, and an F-shaped frame is fixedly connected to the outer wall of the gear ring. According to the utility model, the motor, the worm, the worm wheel, the transmission frame, the gear I, the gear II, the fixed rod, the gear ring, the F-shaped frame and the limiting assembly are matched with one another, so that the backrest body is more stable during rotation, the stability of the backrest body during adjustment is improved, and meanwhile, the fine adjustment of the angle of the backrest body is also realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile seat, especially to an electrically adjustable seat backrest. BACKGROUND

[0002] The automobile seat is installed in the car, and is a key component for providing support and seating position for the driver and passenger, which not only ensures the comfort experience of the driver and passenger, relieves the fatigue of long-distance driving, but also provides necessary safety protection for the driver and passenger through reasonable ergonomic design and reliable structure during vehicle driving, and cooperates with safety devices such as safety belt and airbag to minimize the risk of injury in the event of accidents. Because the body shape, driving habits and seating needs of different drivers and passengers are very different, an electrically adjustable seat backrest is needed.

[0003] The electrically adjustable seat backrest is a kind of automobile seat component, which realizes intelligent seat assembly of backrest angle adjustment with the help of electric drive system. In the traditional technology, the motor drives the screw rod to rotate, drives the nut to move, and then pushes the backrest to adjust. This way is difficult to realize the fine adjustment of the backrest angle. CONTENT OF THE UTILITY MODEL

[0004] In order to make up for the above shortcomings, the utility model provides an electrically adjustable seat backrest, which aims to improve the problem that the precision of screw rod transmission is low and it is difficult to realize the fine adjustment of the backrest angle.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0006] An electrically adjustable seat backrest, comprising a base, the upper surface of the base is provided with a backrest body, the inner wall of the base is fixedly connected with a U-shaped seat, the inner wall of the U-shaped seat is fixedly connected with a motor, the output end of the motor is fixedly provided with a worm, the tooth end of the worm is meshed and connected with a worm wheel, the inside of the worm wheel is fixedly connected with a transmission frame, the both ends of the transmission frame are rotatably connected in the inside of the U-shaped seat, the outer wall of the transmission frame is fixedly connected with a gear one, the tooth end of the gear one is meshed and connected with a gear two, the inside of the gear two is rotatably connected with a fixed rod, the outer wall of the fixed rod is fixedly connected with the inner wall of the U-shaped seat, the tooth end of the gear two is meshed and connected with a gear ring, the outer wall of the gear ring is fixedly connected with an F-shaped frame, the upper surface of the F-shaped frame is fixedly connected with the lower surface of the backrest body, the left outer wall of the U-shaped seat is provided with a limiting assembly, and the limiting assembly is used for limiting the rotation of the F-shaped frame.

[0007] Preferably, the limiting assembly comprises a fixed column, the right outer wall of the fixed column is fixedly connected with the left outer wall of the U-shaped seat, and the outer wall of the fixed column is rotatably connected in the inside of the F-shaped frame.

[0008] Preferably, the inside of the back body is slidably connected with a supporting rod, and the top end of the supporting rod is fixedly connected with a headrest.

[0009] Preferably, the inside of the back body is slidably connected with a slide rod, and the rear outer wall of the slide rod is fixedly connected with a handle.

[0010] Preferably, the front outer wall of the slide rod is fixedly connected with a fixed plate, and the lower surface of the fixed plate is slidably connected to the inner wall of the back body.

[0011] Preferably, the rear outer wall of the fixed plate is fixedly connected with a spring, and the rear outer wall of the spring is fixedly connected to the inner wall of the back body.

[0012] Preferably, the front outer wall of the fixed plate is fixedly connected with a short rod, and the outer wall of the short rod is slidably connected to the inner wall of the supporting rod.

[0013] Preferably, the lower surface of the fixed plate is fixedly connected with a sliding block, and the outer wall of the sliding block is slidably connected to the inner wall of the back body.

[0014] The utility model has the advantages of the following:

[0015] 1. In the utility model, the back body is more stable when rotating through the cooperation of the motor, the worm, the worm gear, the transmission frame, gear one, gear two, the fixed rod, the gear ring, the F-shaped frame and the limiting assembly, the stability of the back body is improved when adjusting, the angle of the back body is finely adjusted, and the fine comfort requirement of a user is met.

[0016] 2. In the utility model, the handle, the slide rod, the spring, the fixed plate, the short rod and the sliding block are cooperated with each other, the supporting rod and the headrest can be quickly installed and disassembled, the height of the headrest can be adjusted, the comfort of a user using the seat is improved, and the headrest is convenient to maintain or replace. DRAWINGS

[0017] Figure 1 It is the perspective view of the electric adjustment type seat backrest of the utility model;

[0018] Figure 2 It is the F-shaped frame local structure schematic view of the electric adjustment type seat backrest of the utility model;

[0019] Figure 3 It is the transmission frame local structure schematic view of the electric adjustment type seat backrest of the utility model;

[0020] Figure 4 It is the sliding block local structure schematic view of the electric adjustment type seat backrest of the utility model.

[0021] Legend:

[0022] 1, base; 2, back body; 3, U-shaped seat; 4, motor; 5, worm; 6, worm gear; 7, transmission frame; 8, gear one; 9, gear two; 10, fixed rod; 11, gear ring; 12, F-shaped frame; 13, fixed column; 14, support rod; 15, headrest; 16, sliding rod; 17, handle; 18, spring; 19, fixed plate; 20, short rod; 21, sliding block. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Reference Figures 1-3 The utility model provides an embodiment: an electric adjustment type seat back, including base 1, the upper surface of base 1 is provided with back body 2, the inner wall of base 1 is fixedly connected with U-shaped seat 3, the inner wall of U-shaped seat 3 is fixedly connected with motor 4, the output end of motor 4 is fixedly provided with worm 5, the tooth end of worm 5 is engagedly connected with worm gear 6, the inside of worm gear 6 is fixedly connected with transmission frame 7, both ends of transmission frame 7 are rotatably connected in the inside of U-shaped seat 3, the outer wall of transmission frame 7 is fixedly connected with gear one 8, the tooth end of gear one 8 is engagedly connected with gear two 9, the inside of gear two 9 is rotatably connected with fixed rod 10, the outer wall of fixed rod 10 is fixedly connected in the inner wall of U-shaped seat 3, the tooth end of gear two 9 is engagedly connected with gear ring 11, the outer wall of gear ring 11 is fixedly connected with F-shaped frame 12, the upper surface of F-shaped frame 12 is fixedly connected in the lower surface of back body 2, the left side outer wall of U-shaped seat 3 is provided with limiting assembly, limiting assembly is used for the limiting when F-shaped frame 12 rotates;

[0025] Specific, through the base 1 and the backrest body 2 between the space is set to part, for backrest body 2 rotation, base 1 does not hinder the rotation of backrest body 2, start motor 4, using the worm 5, transmission frame 7 and worm gear 6 transmission, U-shaped seat 3 on the transmission frame 7 rotation to support the effect, using the transmission frame 7 both sides of the structure are consistent, facilitate through the gear -one 8 and gear two 9 rotation, make transmission frame 7 both sides of the gear ring 11 and F-shaped frame 12 synchronous rotation, also make F-shaped frame 12 and backrest body 2 rotation process more stable, improve the user's comfort adjusting the angle of backrest body 2, fixed column 13 on the F-shaped frame 12 rotation to support and offset limit effect, fixed rod 10 on the gear two 9 rotation to support the effect, after the angle of backrest body 2 adjustment, do not use motor 4, using the worm 5 and worm gear 6, backrest body 2 self-locking.

[0026] Referring to Figure 1 , the inside of the backrest body 2 is slidably connected with a support rod 14, and the top end of the support rod 14 is fixedly connected with a headrest 15;

[0027] Specifically, the inside of the backrest body 2 offsets the sliding of the support rod 14, and also positions the installation of the support rod 14, and the headrest 15 is used to relieve the tension of the neck muscles of the user and prevent neck pain.

[0028] Referring to Figure 4 , the inside of the backrest body 2 is slidably connected with a slide rod 16, and the rear outer wall of the slide rod 16 is fixedly connected with a handle 17; the front outer wall of the slide rod 16 is fixedly connected with a fixed plate 19, the lower surface of the fixed plate 19 is slidably connected to the inner wall of the backrest body 2; the rear outer wall of the fixed plate 19 is fixedly connected with a spring 18, and the rear outer wall of the spring 18 is fixedly connected to the inner wall of the backrest body 2; the front outer wall of the fixed plate 19 is fixedly connected with a short rod 20, and the outer wall of the short rod 20 is slidably connected to the inner wall of the support rod 14; the lower surface of the fixed plate 19 is fixedly connected with a sliding block 21, and the outer wall of the sliding block 21 is slidably connected to the inner wall of the backrest body 2;

[0029] Specifically, the inside of the backrest body 2 offsets the sliding of the support rod 14, and also positions the installation of the support rod 14, and the headrest 15 is used to relieve the tension of the neck muscles of the user and prevent neck pain.

[0030] Working principle: when using the seat backrest, start the motor 4, drive the worm 5 to rotate, the worm wheel 6 is driven by the worm 5 to drive the transmission frame 7 to rotate, the U-shaped seat 3 supports the rotation of the transmission frame 7, the transmission frame 7 drives the gear one 8 to rotate, thereby driving the gear two 9 to rotate on the outer wall of the fixed rod 10, further driving the gear ring 11 to rotate with the center of the transmission frame 7 as the center, further driving the F-shaped frame 12 and the backrest body 2 to rotate stably, under the action of the fixed column 13, the rotation of the F-shaped frame 12 is supported, by pulling the handle 17, the slide rod 16 and the fixed plate 19 are moved backward, the spring 18 is extruded, the fixed plate 19 drives the short rod 20 to slide backward, slides out of the inner wall of the supporting rod 14 and is no longer limited, pulls the headrest 15, and the supporting rod 14 slides in the backrest body 2, the height of the headrest 15 is adjusted, the headrest 15 and the supporting rod 14 can also be disassembled, the position of the supporting rod 14 is maintained, the handle 17 is released, the fixed plate 19 and the sliding block 21 are moved forward under the elastic force of the spring 18, the short rod 20 slides into the inner wall of the supporting rod 14, and the supporting rod 14 is limited, the seat backrest not only reduces the shaking or shaking when the backrest body 2 is adjusted, but also slowly and finely adjusts the angle, and adjusts the height of the headrest 15, so that the user can adjust the height of the headrest 15 according to the height and sitting posture, so that the head is fully supported and the neck fatigue is reduced.

[0031] Finally, it should be pointed out that: the above only for preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. An electrically adjustable seat backrest comprising a base (1), characterised in that: The upper surface of the base (1) is provided with a backrest body (2), the inner wall of the base (1) is fixedly connected with a U-shaped seat (3), the inner wall of the U-shaped seat (3) is fixedly connected with a motor (4), the output end of the motor (4) is fixedly provided with a worm (5), the tooth end of the worm (5) is engagedly connected with a worm gear (6), the inside of the worm gear (6) is fixedly connected with a transmission frame (7), both ends of the transmission frame (7) are rotatably connected in the inside of the U-shaped seat (3), the outer wall of the transmission frame (7) is fixedly connected with a gear one (8), the tooth end of the gear one (8) is engagedly connected with a gear two (9), the inside of the gear two (9) is rotatably connected with a fixed rod (10), the outer wall of the fixed rod (10) is fixedly connected on the inner wall of the U-shaped seat (3), the tooth end of the gear two (9) is engagedly connected with a gear ring (11), the outer wall of the gear ring (11) is fixedly connected with an F-shaped frame (12), the upper surface of the F-shaped frame (12) is fixedly connected on the lower surface of the backrest body (2), the left outer wall of the U-shaped seat (3) is provided with a limiting assembly, and the limiting assembly is used for limiting when the F-shaped frame (12) rotates.

2. The electrically adjustable seat back of claim 1, wherein: The limiting assembly comprises a fixed column (13), and the right outer wall of the fixed column (13) is fixedly connected on the left outer wall of the U-shaped seat (3).

3. The electrically adjustable seat back of claim 1, wherein: The inside of the backrest body (2) is slidably connected with a supporting rod (14), and the top end of the supporting rod (14) is fixedly connected with a headrest (15).

4. The electrically adjustable seat back of claim 1, wherein: The inside of the backrest body (2) is slidably connected with a sliding rod (16), and the rear outer wall of the sliding rod (16) is fixedly connected with a handle (17).

5. The electrically adjustable seat back of claim 4, wherein: The front outer wall of the sliding rod (16) is fixedly connected with a fixed plate (19), and the lower surface of the fixed plate (19) is slidably connected on the inner wall of the backrest body (2).

6. The electrically adjustable seat back of claim 5, wherein: The rear outer wall of the fixed plate (19) is fixedly connected with a spring (18), and the rear outer wall of the spring (18) is fixedly connected on the inner wall of the backrest body (2).

7. The electrically adjustable seat back of claim 5, wherein: The front outer wall of the fixed plate (19) is fixedly connected with a short rod (20), and the outer wall of the short rod (20) is slidably connected on the inner wall of the supporting rod (14).

8. The electrically adjustable seat back of claim 5, wherein: The lower surface of the fixed plate (19) is fixedly connected with a sliding block (21), and the outer wall of the sliding block (21) is slidably connected on the inner wall of the backrest body (2).

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