Automobile headrest electric adjustment mechanism

Abstract

The present invention relates to an electric adjustment mechanism for a car headrest, which comprises a first bracket, a second bracket, a forward sliding block and a forward driving assembly; the forward driving assembly comprises a first driving motor, a first screw rod, a sliding sleeve, a connecting rod and a first rotating shaft; the second bracket is rotatably arranged on the first bracket; the first driving motor is fixedly arranged on the second bracket; the output shaft of the first driving motor is transmission-connected with the first screw rod; the first screw rod passes through the threaded through hole of the sliding sleeve, and the first screw rod forms a transmission match with the threaded through hole of the sliding sleeve; one end of the connecting rod is rotationally connected with the sliding sleeve, and the other end of the connecting rod is rotationally connected with the first rotating shaft; the first rotating shaft is rotationally arranged on the forward sliding block; the forward sliding block is slidingly arranged on the first bracket along the front-rear direction. The present invention can realize the forward movement and lifting of the headrest through motor control, and the forward movement is an overall forward movement, which is better for the fit of the head.

Description

Technical Field

[0001] The invention relates to automobile seat parts, in particular to an automobile headrest electric adjustment mechanism. Background Art

[0002] With the development of the times, cars have become an increasingly common means of transportation. People who drive frequently will find that driving for a long time can easily cause cervical discomfort. The main reason is that in order to ensure the driving vision, people cannot comfortably lean their heads against the headrest of the car seat. Because once the headrest leans against the headrest, the line of sight will be out of the level state.

[0003] In order to solve this problem, car seat designers have added an adjustment function to the car headrest so that the headrest can better serve the driver during driving. The traditional adjustment function is mainly height adjustment. In order to solve the problem that the headrest is leaning back and cannot support the head, car seat designers have added an adjustment function that the headrest can be flipped forward. Although the headrest can support the head after flipping forward, the contact area between the headrest and the head becomes smaller, and there is still a certain gap between the head and neck and the headrest, which still causes discomfort. At the same time, when the car collides, if there is too much gap between the head and the headrest, the headrest will often cause secondary damage to the head. Summary of the invention

[0004] The purpose of the present invention is to provide an electric adjustment mechanism for a car headrest which can realize the lifting and forward movement of the car headrest through electric adjustment.

[0005] The technical solution to achieve the purpose of the present invention is: the present invention has a first bracket, a second bracket, a forward sliding block and a forward driving assembly; the forward driving assembly includes a first driving motor, a first screw rod, a sliding sleeve, a connecting rod and a first rotating shaft; the second bracket is rotatably arranged on the first bracket; the first driving motor is fixedly arranged on the second bracket; the output shaft of the first driving motor is transmission-connected with the first screw rod; the first screw rod passes through the threaded through hole of the sliding sleeve, and the first screw rod forms a transmission fit with the threaded through hole of the sliding sleeve; one end of the connecting rod is rotationally connected with the sliding sleeve, and the other end of the connecting rod is rotationally connected with the first rotating shaft; the first rotating shaft is rotationally arranged on the forward sliding block; the forward sliding block is slidingly arranged on the first bracket along the front-rear direction; the rotation axis of the second bracket, the rotation axes of the two ends of the connecting rod, and the axis of the first rotating shaft are parallel to each other; the rotation axis of the second bracket is perpendicular to the sliding direction of the sliding sleeve.

[0006] It also has a lifting slider and a lifting drive assembly; the lifting drive assembly includes a second drive motor and a second screw rod; the lifting slider is slidably arranged on the forward slider along the up and down directions; the second drive motor is fixedly arranged on the forward slider; the output shaft of the second drive motor is transmission-connected with the second screw rod; the second screw rod passes through the threaded through hole on the lifting slider and forms a transmission fit with the threaded through hole on the lifting slider.

[0007] A guard plate is fixedly provided on the front end surface of the lifting slider. The guard plate and the first bracket can well wrap and protect the components between the two, making the whole mechanism more integrated. At the same time, the guard plate can serve as a support part of the headrest.

[0008] At the same time, it also has a metal insertion rod for being installed on the seat body; the metal insertion rod is fixedly connected to the first bracket.

[0009] Four guide rods extending forward are fixedly provided on the first bracket; four sliding through holes are provided on the forward sliding block; the four guide rods correspond to the four sliding through holes one by one, and respectively pass through the four sliding through holes to form a sliding fit.

[0010] A plurality of arc-shaped protrusions are arranged on the circumferential inner wall of the sliding through hole along the extending direction of the sliding through hole; the arc-shaped protrusions form line contact with the corresponding guide rods.

[0011] The present invention has positive effects: (1) The present invention can realize the overall forward movement of the forward moving slider through the forward moving driving component, that is, the headrest can be moved forward and backward as a whole, so that the fitting area between the headrest and the head is larger and the comfort is stronger.

[0012] (2) The present invention can realize electric adjustment through the forward drive assembly and can meet the adjustment requirements of various positions.

[0013] (3) The present invention uses a screw rod and a connecting rod for adjustment, and the adjustment effect is smooth with low noise; and it makes it possible to realize the forward movement function within the limited space of the headrest.

[0014] (4) The present invention can realize the lifting and lowering adjustment of the headrest through the lifting slider and the lifting drive assembly, further meeting the adjustment requirements and further improving the comfort of the headrest.

[0015] (5) The design of the inner wall of the sliding through hole in the present invention can effectively reduce the friction between the sliding through hole and the guide rod; and eliminates the guide rail design, making the entire design more compact, and further providing the possibility of achieving forward movement within the limited space of the headrest. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is an explosion schematic diagram of the present invention;

[0019] Figure 3 It is a schematic diagram of the assembly of the first bracket and the forward sliding block in the present invention;

[0020] Figure 4 It is a structural schematic diagram of the forward sliding block in the present invention;

[0021] Figure 5 It is a cross-sectional view of the forward sliding block in the present invention;

[0022] Figure 6 It is a structural schematic diagram of the forward drive assembly in the present invention;

[0023] Figure 7 It is a structural schematic diagram of the sliding sleeve in the present invention;

[0024] Figure 8 It is a schematic structural diagram of the forward sliding block, the lifting sliding block and the lifting driving assembly in the present invention. DETAILED DESCRIPTION

[0025] See Figures 1 to 8 The present invention comprises a metal insert rod 8, a first bracket 1, a second bracket 2, a forward sliding block 3, a forward driving assembly 4, a lifting sliding block 5 and a lifting driving assembly 6; the metal insert rod 8 is used to be installed on the seat body; the metal insert rod 8 is fixedly connected to the first bracket 1.

[0026] The forward drive assembly 4 includes a first drive motor 41, a first screw rod 42, a sliding sleeve 43, a connecting rod 44 and a first rotating shaft 45; the two ends of the second bracket 2 are rotatably arranged on the first bracket 1 respectively; the first drive motor 41 is fixedly arranged on the second bracket 2; the output shaft of the first drive motor 1 is connected to the worm gear, and the worm gear is matched with the first screw rod 42 in transmission; through the cooperation between the worm gear and the first screw rod 42, the first drive motor 41 can be placed horizontally to meet the installation space requirements; the first screw rod 42 passes through the threaded through hole of the sliding sleeve 43, and the first screw rod 42 forms a transmission cooperation with the threaded through hole of the sliding sleeve 43; one end of the connecting rod 44 is rotatably connected to the sliding sleeve 43, and the other end of the connecting rod 44 is rotatably connected to the first rotating shaft 45; the forward sliding block 3 is provided with an installation cavity for inserting and installing the first rotating shaft 45; the first rotating shaft 45 is rotatably arranged in the installation cavity of the forward sliding block 3, and the first rotating shaft 45 is coaxially arranged with the installation cavity.

[0027] The first bracket 1 is fixed with four guide rods 11 extending forward; the forward sliding block 3 is provided with four sliding holes 31; the four guide rods 11 correspond to the four sliding holes 31 one by one, and respectively pass through the four sliding holes 31 to form a sliding fit. The four guide rods 11 are distributed in a rectangular shape.

[0028] A plurality of arc-shaped protrusions 32 are provided on the circumferential inner wall of the sliding through hole 31 along the extending direction of the sliding through hole 31 ; the arc-shaped protrusions 32 form linear contact with the corresponding guide rods 11 .

[0029] The rotation axis of the second bracket 2 , the rotation axes of both ends of the connecting rod 44 , and the axis of the first rotating shaft 45 are parallel to each other; the rotation axis of the second bracket 2 is perpendicular to the sliding direction of the sliding sleeve 43 .

[0030] The lifting drive assembly 6 includes a second driving motor 61 and a second screw rod 62; the forward sliding block 3 is provided with a slide groove 33 extending in the vertical direction; a connecting plate 63 is fixedly provided in front of the slide groove 33; a limiting groove is provided on the connecting plate 63; the lifting sliding block 5 is slidably arranged in the slide groove 33, and the front end face of the lifting sliding block 5 extends out of the slide groove 33, and is fixedly connected to the guard plate 7 after extending out of the limiting groove.

[0031] The second drive motor 61 is fixedly arranged on the forward sliding block 3; the output shaft of the second drive motor 61 is connected to the worm gear transmission, and the worm gear is matched with the second screw rod 62 in transmission; through the cooperation between the worm gear and the second screw rod 62, the second drive motor 61 can be placed horizontally to meet the installation space requirements; the second screw rod 62 passes through the threaded through hole on the lifting sliding block 5 and forms a transmission cooperation with the threaded through hole on the lifting sliding block 5.

[0032] The guard plate 7 and the first bracket 1 form a protective body that can protect the components therebetween. In the later production of the headrest, the adjustable headrest part is arranged on the guard plate 7, so that a good adjustment effect can be achieved.

[0033] The working process of the present invention is as follows:

[0034] Forward and backward adjustment of the headrest: the first drive motor 41 starts working after receiving the adjustment instruction, and drives the first screw 42 to rotate through the worm gear; the first screw drives the sliding sleeve 43 to slide on the first screw 42; as the sliding sleeve 43 slides, it drives the connecting rod 44 to push and pull the first rotating shaft 45, and as the pushing and pulling, the second bracket 2 rotates compensatingly; the first rotating shaft 45, under the action of the connecting rod 44, will push the forward sliding block 3 to move forward or backward. Therefore, the forward and backward adjustment of the headrest can be achieved by controlling the forward and reverse rotation of the first drive motor 41.

[0035] Lifting and lowering adjustment of the headrest: the second drive motor 61 starts working after receiving the adjustment instruction, and the second drive motor 61 drives the second screw rod 62 to rotate through the worm gear, and the second screw rod 62 drives the lifting slider 5 to lift and slide on the forward slider 3. Therefore, the front and rear adjustment of the headrest can be achieved by controlling the forward and reverse rotation of the second drive motor 61.

[0036] The above-mentioned driving motors are all servo motors. Since servo motors are existing technologies, their structures and working principles are not described in detail here.

[0037] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The electric adjustment mechanism of the automobile headrest is characterized by: The invention comprises a first bracket (1), a second bracket (2), a forward sliding block (3) and a forward driving assembly (4); the forward driving assembly (4) comprises a first driving motor (41), a first screw rod (42), a sliding sleeve (43), a connecting rod (44) and a first rotating shaft (45); the second bracket (2) is rotatably arranged on the first bracket (1); the first driving motor (41) is fixedly arranged on the second bracket (2); the output shaft of the first driving motor (1) is transmission-connected with the first screw rod (42); the first screw rod (42) passes through the threaded through hole of the sliding sleeve (43), and the first screw rod (44) is connected to the first rotating shaft (45). The rod (42) and the threaded through hole of the sliding sleeve (43) form a transmission fit; one end of the connecting rod (44) is rotationally connected to the sliding sleeve (43), and the other end of the connecting rod (44) is rotationally connected to the first rotating shaft (45); the first rotating shaft (45) is rotationally arranged on the forward sliding block (3); the forward sliding block (3) is slidingly arranged on the first bracket (1) along the front-back direction; the rotation axis of the second bracket (2), the rotation axes of the two ends of the connecting rod (44), and the axis of the first rotating shaft (45) are parallel to each other; the rotation axis of the second bracket (2) is perpendicular to the sliding direction of the sliding sleeve (43); The invention also comprises a lifting slider (5) and a lifting drive assembly (6); the lifting drive assembly (6) comprises a second drive motor (61) and a second screw rod (62); the lifting slider (5) is slidably arranged on the forward slider (3) in the up-down direction; the second drive motor (61) is fixedly arranged on the forward slider (3); the output shaft of the second drive motor (61) is transmission-connected with the second screw rod (62); the second screw rod (62) passes through the threaded through hole on the lifting slider (5) and forms a transmission match with the threaded through hole on the lifting slider (5); Four guide rods (11) extending forward are fixedly provided on the first bracket (1); four sliding through holes (31) are provided on the forward sliding block (3); the four guide rods (11) correspond to the four sliding through holes (31) one by one, and respectively pass through the four sliding through holes (31) to form a sliding fit; A plurality of arc-shaped protrusions (32) are provided on the circumferential inner wall of the sliding through hole (31) along the extension direction of the sliding through hole (31); the arc-shaped protrusions (32) form linear contact with the corresponding guide rods (11).

2. The electric adjustment mechanism for automobile headrest according to claim 1, characterized in that: A guard plate (7) is fixedly provided on the front end surface of the lifting slide block (5).

3. The electric adjustment mechanism for automobile headrest according to claim 1, characterized in that: It also has a metal insertion rod (8) for being installed on the seat body; the metal insertion rod (8) is fixedly connected to the first bracket (1).

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