Automobile rear-row seat backrest electric angle adjusting device and automobile rear-row seat thereof

Abstract

The utility model discloses an automobile rear seat backrest electric angle adjusting device and an automobile rear seat thereof, and belongs to the technical field of vehicles. A sliding block moving seat is formed on the right side of the sliding block; the vehicle body fixing plate is fixed with the vehicle body, a fixing plate rear supporting wing is arranged at the rear end of the vehicle body fixing plate, a fixing plate front supporting wing is arranged at the front end of the vehicle body fixing plate, and a pair of sliding block sliding guide rods is arranged between the opposite sides of the fixing plate front supporting wing and the fixing plate rear supporting wing; the sliding block screw rod is supported on the rear supporting wing of the fixed plate; the sliding block screw driving mechanism is fixed on the front side of the front supporting wing of the fixed plate; and the anti-backlash mechanism is arranged between the opposite sides of the sliding block and the vehicle body fixing plate, and is characterized in that the cross section of the sliding block moving seat is in a hump shape, and the anti-backlash mechanism is matched with the outer surface of the sliding block moving seat in an enveloping state in an embracing manner. The anti-backlash mechanism has the advantages that the close matching effect between the anti-backlash mechanism and the sliding block moving seat can be guaranteed, so that the backrest is kept in a stable state; the anti-backlash mechanism and the sliding block form a good matching relationship; and the overall durability of the seat is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to vehicle technical field, concretely relates to a kind of automobile rear seat backrest electric angle adjusting device, and it further relates to automobile rear seat. BACKGROUND

[0002] The aforementioned automobile rear seat refers to the seat installed in the rear of automobile for the person to be seated, which is usually composed of two independent seats, and the front and rear positions and backrest angle can be adjusted to adapt to different height and body shape of the person to be seated. With the development of automobile industry, the requirement of people to automobile is also constantly expanding in depth and breadth, and the angle adjusting function of automobile rear seat backrest (also called "chair back", same below) is produced in order to meet the pursuit of the person to be seated to the comfort of the person to be seated, because the backrest angle is too steep and cannot be adjusted, then the person to be seated will feel uncomfortable and the waist pain will be produced after a little longer time of being seated.

[0003] There are not a few technical information related to the angle adjusting device of automobile rear seat backrest in the disclosed Chinese and foreign patent documents, such as CN216610960U recommending "a rear seat backrest angle adjusting mechanism", CN211401214U providing "a rear seat backrest angle adjusting structure", CN218519564U disclosing "a rear seat backrest angle adjusting mechanism", CN205059321U introducing "a rear seat backrest angle adjusting mechanism", CN211765085U announcing "a backrest angle adjusting mechanism for rear seat of vehicle and vehicle track" and KR20130068949A disclosing "a rear seat backrest adjusting mechanism for vehicle", etc.

[0004] As known in the art, an anti-backlash component or mechanism is usually provided in the structural system of the backrest angle adjustment device of the rear seat of a vehicle, and the positive significance of the anti-backlash mechanism is at least: to ensure that the backrest is maintained in a stable state after adjustment, and will not sway due to the vibration (also known as "vibration") during vehicle driving or the slight movement of the passenger, so as to provide good support for the passenger's back and help to reduce the fatigue feeling caused by long-time sitting; to enhance the safety of sitting, because the stable seat backrest can enhance the passenger's body balance during vehicle driving, avoid accidents caused by the instability of the body center of gravity due to swaying, especially in the case of vehicle emergency braking or turning, the anti-backlash mechanism can ensure that the passenger's body is reliably supported, thereby improving the safety; to improve the experience of sitting, the anti-backlash mechanism eliminates the gap of the seat backrest after adjustment, so that the fit between the seat backrest and the passenger's back is more closely, thereby improving the comfort and stability of sitting and reducing the discomfort caused by the swaying or gap of the seat; to prolong the service life of the seat, because the anti-backlash mechanism can reduce the wear and looseness of the seat backrest during adjustment, thereby being very beneficial to prolong the service life of the seat. By keeping the stability of the seat backrest, the additional stress and wear caused by the gap can be avoided, and the overall durability of the seat is improved.

[0005] In the structural system of the "automobile rear seat electric angle adjustment mechanism" provided in Chinese Patent CN204184217U, a rubber support pad assembly is provided as an anti-backlash mechanism, which is composed of a support pad mounted on the bottom plate and a rubber pad mounted on the support pad and in contact with the bottom of the support seat pad (for details, see the specification of the patent at paragraph 0032 and the corresponding drawings Figure 3 ).

[0006] The rubber support pad assembly in the CN204184217U can eliminate the gap to some extent, but due to the structural factors, the following defects exist: one end of the pair of rubber pads of the gap elimination mechanism structure system respectively penetrates into the slider slot formed on the side of the slider towards the vehicle body fixing plate (the patent refers to "the bottom plate part"), and the other end of the pair of rubber pads is respectively supported on the support pad of the gap elimination mechanism structure system, and the longitudinal section shape of the support pad is in the shape of a "n" character, so that the middle part of the opposite side of the pair of rubber pads respectively contacts the two sides of the vertical part of the "n" character. Therefore, the gap elimination mechanism composed of the pair of rubber pads and the support pad can basically meet the requirements of eliminating the gap between the slider and the vehicle body fixing plate when the slider is in a certain specific angle state, such as when the backrest of the car seat is in a state of being perpendicular to the seat (i.e. "cushion") or when the backrest is only slightly adjusted in angle, but when the backrest angle is adjusted to a relatively large extent, the gap elimination effect will be obviously poor, especially the gap elimination effect will be weakened with the increase of the backrest adjustment angle, and even the function will be lost, because the structure of the gap elimination mechanism does not have the function of semi-holding or semi-enveloping the certain part of the slider; because the gap elimination mechanism is located between the opposite sides of the slider and the vehicle body fixing plate in a single support point resistance supporting mode, when the vehicle encounters situations such as sudden braking, sharp turning, severe bumping and vibration during driving, the single support point resistance will have a gap, which will cause the backrest to shake, thereby affecting the comfort of the occupant, and even causing the fear of insecurity; due to the unreasonable structure, additional stress and wear will be caused by the gap, which will affect the overall durability of the rear seat of the car. Content of the utility model

[0007] The utility model discloses a kind of automobile rear seat backrest electric angle adjustment devices, which can help to eliminate the gap between slider and vehicle body fixing plate by gap elimination mechanism, so that backrest can be maintained in stable state and will not shake due to normal driving of vehicle or body movement of occupant, and will not make annoying sound, which is beneficial to form ideal matching relationship between gap elimination mechanism and slider, so that gap can not be generated between slider and vehicle body fixing plate during driving of vehicle, and backrest can not shake to cause fear of insecurity of occupant, and it is beneficial to avoid wear of gap elimination mechanism itself, so that the overall durability of seat can be guaranteed.

[0008] Another task of the utility model is to provide a kind of automobile rear seat, which can guarantee that the technical effect of the automobile rear seat backrest electric angle adjustment device is fully embodied.

[0009] The utility model discloses a kind of automobile rear seat backrest electric angle adjusting devices, including a slider, the slider is connected with automobile rear seat backrest by lock hook piece in use state, and there is a slider moving seat in horizontal state in the right side of the slider;A car body fixed plate, the car body fixed plate is fixed with car body in use state, and a fixed plate rear supporting wing is unfolded to the left in the rear end of the car body fixed plate, and a fixed plate front supporting wing is unfolded to the left in the front end, the fixed plate front, rear supporting wing correspond with each other, and a pair of slider sliding guide rod is fixed in the state of each other parallel with each other between the facing side of fixed plate front, rear supporting wing;A slider screw rod, the rear end of the slider screw rod is rotatably supported on fixed plate rear supporting wing and stretches to the rear side of fixed plate rear supporting wing, the front end of the slider screw rod is rotatably supported on fixed plate front supporting wing, the front end of the slider screw rod stretches to the front side of fixed plate front supporting wing and extends a screw rod transmission connection shaft head, and the middle part of the slider screw rod is between the facing side of fixed plate front, rear supporting wing and corresponds to the left side between the pair of slider sliding guide rod, the slider and the pair of slider sliding guide rod form sliding pair, and the slider moving seat is threadedly cooperated with the middle part of slider screw rod;A slider screw rod driving mechanism, the slider screw rod driving mechanism is fixed in the front side of fixed plate front supporting wing and is transmissionally connected with the screw rod transmission connection shaft head;An anti-backlash mechanism, the anti-backlash mechanism is arranged between the facing side of the slider and the car body fixed plate and moves with the front and back movement of slider, characterized in that the cross-sectional shape of the slider moving seat is hump-shaped, and the anti-backlash mechanism is enveloped with the outer surface of slider moving seat in the form of engagement.

[0010] In one specific embodiment of the utility model, the anti-clearance mechanism includes a pair of slider moving seat first compliant pad, a pair of slider moving seat second compliant pad, a car body fixed plate resistance frame, a compliant pad wing first boot and a compliant pad wing second boot, a pair of slider moving seat first compliant pad forms 90 degree right deflection splayed shape relation with each other and the right end face commonly with a first compliant pad wing left side constitutes integral structure, the space between the opposite side of a pair of slider moving seat first compliant pad constitutes slider moving seat outer surface first embrace cavity, a pair of slider moving seat second compliant pad forms 90 degree right deflection splayed shape relation with each other and the right end face commonly with a second compliant pad wing left side constitutes integral structure, the space between the opposite side of a pair of slider moving seat second compliant pad constitutes slider moving seat outer surface second embrace cavity, slider moving seat outer surface first, second embrace cavity same size and each other front and back correspond, the upper end of car body fixed plate resistance frame extends a upper resistance foot, and the lower end extends a lower resistance foot, the upper and lower resistance foot slidingly with the left side of car body fixed plate abuts, compliant pad wing first boot is located the rear side of body fixed plate resistance frame and constitutes integral structure with body fixed plate resistance frame, and the compliant pad wing first boot constitutes a first compliant pad wing embedding cavity with a boot opening towards left, the first compliant pad wing is inserted and embedded with the first compliant pad wing embedding cavity, and the compliant pad wing second boot constitutes a second compliant pad wing embedding cavity with a boot opening towards left, and the second compliant pad wing is inserted and embedded with the second compliant pad wing embedding cavity.

[0011] In another specific embodiment of the utility model, a slider screw thread hole is formed in the length direction of the slider moving seat of the slider, and the slider screw thread hole is threadedly engaged with the slider screw driven by the slider screw driving mechanism fixed to the front side of the front supporting wing of the fixed plate.

[0012] In still another specific embodiment of the utility model, the screw transmission connecting shaft head is a spline shaft head; the slider screw driving mechanism includes a motor and a reduction box, the motor has a power socket, the motor is fixed to the downward side of the reduction box seat of the reduction box in a longitudinal cantilever state, the motor shaft of the motor faces upward and is transmissionally connected with the reduction box, the reduction box is fixed to the upward side of the reduction box seat, and the reduction box is fixed to the front side of the front supporting wing of the fixed plate together with the reduction box seat and the motor through a group of reduction box body fixing screws, the reduction box last stage power output wheel is transmissionally connected with the screw transmission connecting shaft head through the output wheel spline hole formed in the central position of the reduction box.

[0013] In another specific embodiment of the utility model, the motor is a direct current brush motor with forward and reverse rotation functions.

[0014] In still another specific embodiment of the utility model, the front of the sliding block screw corresponds to the pair of sliding block sliding guide rods and forms an equilateral triangle or isosceles triangle distribution relationship with the pair of sliding block sliding guide rods.

[0015] In still another specific embodiment of the utility model, a sliding block upper sliding sleeve hole is formed in the upper front side and rear side of the sliding block, and a sliding block upper sliding sleeve is inserted into the sliding block upper sliding sleeve hole, wherein the sliding block upper sliding sleeve and the upper one of the pair of sliding block sliding guide rods form a sliding pair; a sliding block lower sliding sleeve hole is formed in the lower front side and rear side of the sliding block, and a sliding block lower sliding sleeve is inserted into the sliding block lower sliding sleeve hole, wherein the sliding block lower sliding sleeve and the lower one of the pair of sliding block sliding guide rods form a sliding pair.

[0016] In still another specific embodiment of the utility model, the pair of sliding block moving seat first compliant pads and the pair of sliding block moving seat second compliant pads are rectangular bodies made of rubber, and the first compliant pad wings and the second compliant pad wings are made of rubber; the car body fixed plate resistance frame, the compliant pad wing first shoe and the compliant pad wing second shoe are integrally molded from plastic.

[0017] In still another specific embodiment of the utility model, a sliding block screw shaft head limiting nut thread is formed at the right end of the sliding block screw and at the rear side of the fixed plate rear supporting wing, and a sliding block screw shaft head limiting nut is screwed onto the sliding block screw shaft head limiting nut thread; a guide rod limiting piece for preventing the pair of sliding block sliding guide rods from moving forward and backward is arranged at the rear end of the pair of sliding block sliding guide rods and at the rear side of the fixed plate rear supporting wing, and at the front end of the pair of sliding block sliding guide rods and at the front side of the fixed plate front supporting wing, and the guide rod limiting piece is a snap spring or a split pin.

[0018] Another task of the utility model is accomplished in such a way, a rear seat of car is provided with automobile rear seat backrest electric angle adjusting device.

[0019] The technical effect of the technical solution provided by the utility model is that: since the cross-sectional shape of the slider moving seat of the slider is designed to form a hump-shaped structure with a transition arc surface, and the gap-eliminating mechanism is designed to be able to engage with the outer surface of the slider moving seat in an envelope state, the close cooperation effect between the gap-eliminating mechanism and the slider moving seat can be guaranteed, which helps the gap-eliminating mechanism to effectively eliminate the gap between the slider and the vehicle body fixed plate so that the backrest can be maintained in a stable state and will not shake or make noise due to normal vehicle driving or movement of the passenger's body; it is conducive to the formation of a good cooperation relationship between the gap-eliminating mechanism and the slider to avoid the generation of a gap between the slider and the vehicle body fixed plate when the vehicle encounters braking, emergency turning and severe bumps during driving, causing the backrest to tremble and bring a sense of fear of loss of safety to the passenger; since the gap-eliminating mechanism can avoid the generation of a gap between it and the slider and the vehicle body fixed plate, the gap-eliminating mechanism itself is not easy to wear and can ensure the overall durability of the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an assembly structure diagram of an embodiment of the utility model;

[0021] Figure 2 for Figure 1 The structural diagram of the anti-backlash mechanism shown;

[0022] Figure 3 for Figure 1 Schematic diagram after assembly is completed;

[0023] Figure 4 for Figure 1 The schematic diagram shown is of the anti-backlash mechanism cooperating with the slider moving seat of the slider. DETAILED DESCRIPTION

[0024] In order to more clearly understand the technical essence and beneficial effects of the present invention, the applicant provides a detailed description in the form of embodiments below. However, the description of the embodiments does not limit the scheme of the present invention. Any equivalent transformation that is merely formal and not substantial based on the concept of the present invention should be regarded as within the scope of the technical solution of the present invention.

[0025] In the following description, all concepts related to directionality or orientation, such as up, down, left, right, front and back, are based on the current Figure 1 The position state is used as a reference, and therefore it cannot be understood as a special limitation on the technical solution provided by the present utility model.

[0026] See Figure 1 and Figure 2, show a slider 1 (also known as "sliding plate" in the industry), which is connected with the backrest of the rear seat of the car through the hook member 6 in the use state, and a slider moving seat 11 is formed in the horizontal state at the right side of the slider 1; show a car body fixing plate 2, which is fixed with the car body in the use state, and a fixing plate rear supporting wing 21 is folded leftward at the rear end of the car body fixing plate 2, and a fixing plate front supporting wing 22 is folded leftward at the front end of the car body fixing plate 2, the fixing plate front and rear supporting wings 22, 21 correspond to each other in front and back, and a pair of slider sliding guide rods 23 are fixed in the state of parallel to each other in the upper and lower sides between the facing sides of the fixing plate front and rear supporting wings 22, 21; show a slider screw rod 3, the rear end of the slider screw rod 3 is rotatably supported on the fixing plate rear supporting wing 21 through the slider screw rod rear bearing seat 33 or the slider screw rod rear shaft sleeve and extends to the rear side of the fixing plate rear supporting wing 21, the front end of the slider screw rod 3 is rotatably supported on the fixing plate front supporting wing 22 through the slider screw rod front bearing seat 34 or the slider screw rod front shaft sleeve, the front end of the slider screw rod 3 extends to the front side of the fixing plate front supporting wing 22 and extends a screw rod transmission connection shaft head 31, and the middle part of the slider screw rod 3 is located between the facing sides of the fixing plate front and rear supporting wings 22, 21 and corresponds to the left side between the pair of slider sliding guide rods 23, the slider 1 and the pair of slider sliding guide rods 23 form a sliding pair, and the slider moving seat 11 is threadedly connected with the middle part of the slider screw rod 3; show a slider screw rod driving mechanism 4, which is fixed on the front side of the fixing plate front supporting wing 22 and is in transmission connection with the screw rod transmission connection shaft head 31; show a clearance elimination mechanism 5, which is arranged between the facing sides of the slider 1 and the car body fixing plate 2 and moves with the forward and backward movement of the slider 1.

[0027] As shown by Figure 1 , a pair of hook member fixing column holes 14 are formed on the slider 1, the right end of the hook member 6 extends a pair of hook member fixing columns 61, the pair of hook member fixing columns 61 are inserted into the pair of hook member fixing column holes 14 and are fixed with the left side of the slider 1 by welding or through fasteners corresponding to the positions of the pair of hook member fixing column holes 14. In the use state, the left end of the hook member 6 is connected with the hook head (on the backrest of the rear seat of the car) of the backrest of the rear seat of the car. As a preferred solution, a hook member reinforcing plate 62 can also be arranged at the right end of the cavity (U-shaped cavity) of the hook member 6. In the actual use state, the hook head on the backrest of the rear seat of the car is usually designed to be in a structure form that can be hooked (hooked) or unhooked with the hook member 6, because when the backrest is folded in the chair direction as needed under certain circumstances, the backrest cannot be folded in the forward direction, i.e., in the chair direction, if the hooking of the backrest connecting hook head and the hook member 6 is not released.

[0028] In Figure 1 The upper and lower parts of the vehicle body plate 2 each extend a vehicle body fixing plate fixing wing plate 24 in a folded state (usually formed by stamping a sheet metal), and a wing plate fixing hole 241 is formed in the vehicle body fixing plate fixing wing plate 24. In the use state, the vehicle body fixing plate fixing wing plate 24 is fixed to the vehicle body by the wing plate fixing hole 241 using fasteners such as bolts, and the position of the vehicle body is substantially corresponding to the position of the C pillar of a car, such as a small car. The aforementioned C pillar is a vertical column on both sides of the rear windshield of the car, located at the rear of the vehicle body, and the C pillar serves to support the roof and the rear windshield, and is an important part of the structure of the car, which helps to maintain the overall stability and strength of the vehicle body. The C pillar can bear a certain collision energy to protect the safety of the rear seat passengers. The C pillar plays a role in making the overall lines of the vehicle body more smooth and beautiful.

[0029] The more specific content of the vehicle body fixing base plate 1 in the use state can be seen from the description and drawings of the patent CN211765085U mentioned by the applicant in the background art column above, and the lock hook 6 mentioned above is also connected with the rear seat backrest of the car in the use state. It can also be seen from CN211765085U, so the applicant will not explain it in detail below.

[0030] The technical points of the technical scheme provided by the utility model are as follows: the cross-sectional shape of the sliding block moving seat 11 is hump-shaped, and the anti-backlash mechanism 5 is in an enveloping state and is in a clamping type fit with the outer surface of the sliding block moving seat 11.

[0031] Since the word "hump" has different interpretations in different situations, for example, the hump involved in the electronic and electrical field is essentially a relatively abstract wave peak. Therefore, the applicant explains the hump in the utility model as follows: the hump referred to in the utility model is a description of the cross-sectional shape of a specific object, that is, the cross-sectional shape of the sliding block moving seat 11 is limited to the shape of the hump on the back of a camel.

[0032] The aforementioned enveloping state in the utility model refers to the clamping type fit of the anti-backlash mechanism 5 to the outer surface of the sliding block moving seat 11, that is, to the three surfaces of the hump-shaped outer surface.

[0033] Please refer to Figure 4 and in combination with Figure 1 and Figure 2, the aforementioned anti-backlash mechanism 5 comprises a pair of slider moving seat first compliant pads 51, a pair of slider moving seat second compliant pads 52, a car body fixed plate stopper 53, a compliant pad wing first shoe 54 and a compliant pad wing second shoe 55, the pair of slider moving seat first compliant pads 51 form an 8-shaped relationship with each other with a rightward inclination of 90° (i.e. a rightward tilting of 90°) and the right end faces collectively form an integral structure with the left side of a first compliant pad wing 511, the space between the opposite sides of the pair of slider moving seat first compliant pads 51 is configured as a slider moving seat outer surface first embracing cavity 512, the pair of slider moving seat second compliant pads 52 form an 8-shaped relationship with each other with a rightward inclination of 90° (i.e. a rightward tilting of 90°) and the right end faces collectively form an integral structure with the left side of a second compliant pad wing 521, the space between the opposite sides of the pair of slider moving seat second compliant pads 52 is configured as a slider moving seat outer surface second embracing cavity 522, the slider moving seat outer surface first and second embracing cavities 512, 522 are the same size and correspond to each other in front and back, the car body fixed plate stopper 53 has an upper stopper foot 531 extending from the upper end and a lower stopper foot 532 extending from the lower end, the aforementioned upper and lower stopper feet 531, 532 slide against the left side of the aforementioned car body fixed plate 2, the compliant pad wing first shoe 54 is located at the rear side of the car body fixed plate stopper 53 and forms an integral structure with the car body fixed plate stopper 53, the compliant pad wing first shoe 54 is configured with a shoe opening facing left first compliant pad wing embedding cavity 541, the aforementioned first compliant pad wing 511 and first compliant pad wing embedding cavity 541 are inserted and fitted, the compliant pad wing second shoe 55 is configured with a shoe opening facing left second compliant pad wing embedding cavity 551, the aforementioned second compliant pad wing 521 and second compliant pad wing embedding cavity 551 are inserted and fitted; the aforementioned slider moving seat outer surface first and second embracing cavities 512, 522 are embracedly fitted with the slider moving seat 11 of the aforementioned slider 1 and the pair of slider moving seat first and second compliant pads 51, 52 move with the movement of the aforementioned slider moving seat 11.

[0034] A slider screw fitting screw hole 111 is formed in the length direction of the slider moving seat 11 of the aforementioned slider 1, the slider screw fitting screw hole 111 is threadedly fitted with the aforementioned slider screw 3 driven by the aforementioned slider screw driving mechanism 4 fixed to the front side of the aforementioned fixed plate front support wing 22.

[0035] As shown in Figure 1 and Figure 2 , the aforementioned slider moving seat outer surface first and second embracing cavities 512, 522 each expand right to left, i.e. towards the direction of the slider moving seat 11, to meet the reliable enveloping requirement of the slider moving seat 11 with a hump-shaped cross-sectional shape.

[0036] Please refer to Figure 1 and Figure 4The screw transmission connecting shaft head 31 is a spline shaft head. The slider screw drive mechanism 4 comprises a motor 41 and a reduction box 42. The motor 41 has a power socket 411. The motor 41 is fixed to the side of the reduction box seat 421 of the reduction box 42 in a longitudinal cantilever state. The motor shaft of the motor 41 is upward and transmission connected with the reduction box 42. The reduction box 42 is fixed to the upward side of the reduction box seat 421. The reduction box 42 is fixed with the reduction box seat 421 and the motor 41 on the front side of the front supporting wing 22 of the fixed plate through a group of reduction box body fixing screws 422. The reduction box final stage power output wheel 423 of the reduction box 42 is transmission matched with the screw transmission connecting shaft head 31 through the output wheel spline hole 4231 formed in the central position.

[0037] Preferably, a plurality of screw fixing connection columns 221 corresponding to the reduction box body fixing screws 422 are extended on the front side of the front supporting wing 22 in a horizontal cantilever state. The number of the screw fixing connection columns 221 is equal to that of the reduction box body fixing screws 422 (three in the embodiment, but not limited to the number).

[0038] In the embodiment, the motor 41 is a direct current brush motor with forward and reverse rotation functions.

[0039] As shown in Figure 1 and Figure 3 , the slider screw 3 corresponds to the front between the pair of slider sliding guide rods 23 and forms an equilateral triangle distribution relationship with the pair of slider sliding guide rods 23, or an isosceles triangle distribution relationship. The equilateral triangle and isosceles triangle distribution relationship refers to the position relationship observed in the transverse section state.

[0040] As shown in Figure 1 , a slider upper sliding sleeve hole 12 is formed on the upper front side and the upper rear side of the slider 1. A slider upper sliding sleeve 121 is inserted into the slider upper sliding sleeve hole 12. The slider upper sliding sleeve 121 forms a sliding pair with the upper slider sliding guide rod of the pair of slider sliding guide rods 23. A slider lower sliding sleeve hole 13 is formed on the lower front side and the lower rear side of the slider 1. A slider lower sliding sleeve 131 is inserted into the slider lower sliding sleeve hole 13. The slider lower sliding sleeve 131 forms a sliding pair with the lower slider sliding guide rod of the pair of slider sliding guide rods 23.

[0041] The first compliant pad 51 and the second compliant pad 52 are rectangular in shape (in the embodiment, cuboid) and made of rubber, and the first compliant pad wing 511 and the second compliant pad wing 521 are made of rubber.

[0042] Preferably, a screw rod shaft head limiting nut thread 32 is formed at the right end of the screw rod 3 and at the rear side of the rear support wing 21 of the fixed plate, and a screw rod shaft head limiting nut 321 is screwed on the screw rod shaft head limiting nut thread 32.

[0043] The utility model also provides an automobile rear seat backrest electric angle adjusting device which is not shown in the figure.

[0044] The applicant briefly describes the working principle of the utility model. Through operation of the switch arranged at the side of the seat or other reasonable position, the motor 41 of the structural system of the slider screw rod driving motor 4 is operated, the speed is reduced through the reduction box 42, and the slider screw rod transmission connecting shaft head 31 is driven by the power output wheel 423 at the end of the reduction box, so that the slider screw rod 3 rotates. The rotation of the slider screw rod 3 drives the sliding block moving seat 11 which is threadedly connected with the slider screw rod 3 to slide along the pair of sliding block sliding guide rods 23 while the sliding block 1 moves along the slider screw rod 3. At the same time, the backrest of the rear seat of the car is tilted forward or backward by the sliding block 1 through the lock hook 6 to realize the change of the backrest angle. The tilting or backward leaning of the backrest depends on the forward or backward movement of the sliding block 1, and the forward or backward movement of the sliding block depends on the forward rotation or reverse rotation of the slider screw rod 3, and the forward rotation or reverse rotation of the slider screw rod 3 depends on the clockwise or counterclockwise operation of the motor 41. The clockwise or counterclockwise operation of the motor 41 depends on the operation mode of the switch by the passenger. In the process of the forward or backward displacement of the sliding block 1, the first and second flexible cushion blocks 51 and 52 of each pair of sliding block moving seat of the structural system of the clearance elimination mechanism 5 form a reliable enveloping engagement relationship with the sliding block moving seat 11, so that the sliding block 1 can be kept in a good step-by-step relationship. Especially, no gap appears between the clearance elimination mechanism 5 and the sliding block 1 and between the vehicle body fixing plate 2 under the conditions such as sudden braking, sharp turning and severe bumping of the vehicle. The adjustment degree of the chair back angle is usually based on the comfortable degree of the passenger.

[0045] In summary, the technical scheme provided by the utility model makes up for the defects in the prior art, successfully completes the invention task, and truly realizes the technical effects described in the technical effect column above.

Claims

1. An electric angle adjustment device for a rear seat backrest of an automobile, comprising a slider (1), which is connected to the rear seat backrest of the automobile through a lock hook (6) in a use state, and a slider moving seat (11) is formed in a horizontal state on the right side of the slider (1); a vehicle body fixing plate (2), which is fixed to the vehicle body in a use state, and has a fixing plate rear support wing (21) folded and unfolded at the rear end of the vehicle body fixing plate (2), and a fixing plate front support wing (22) folded and unfolded at the front end, the fixing plate front and rear support wings (22, 21) correspond to each other front and back, and a pair of slider sliding guide rods (23) are fixed between the opposite sides of the fixing plate front and rear support wings (22, 21) in a state parallel to each other in an upper and lower direction; a slider screw (3), the rear end of the slider screw (3) is rotatably supported on the fixing plate rear support wing (21) and extends to the rear side of the fixing plate rear support wing (21), and the slider screw (3) is fixed to the vehicle body in a use state. The front end is rotatably supported on the front support wing (22) of the fixed plate, the front end of the slider screw (3) extends to the front side of the front support wing (22) of the fixed plate and extends a screw transmission connection shaft head (31), and the middle part of the slider screw (3) is located between the opposite sides of the front and rear support wings (22, 21) of the fixed plate and corresponds to the left side between the pair of slider sliding guide rods (23), the slider (1) and the pair of slider sliding guide rods (23) form a sliding pair, and the slider moving seat (11) is threadedly matched with the middle part of the slider screw (3); a slider screw driving mechanism (4), the slider screw driving mechanism (4) is fixed to the front side of the front support wing (22) of the fixed plate and is transmission-connected to the screw transmission connection shaft head (31); a gap elimination mechanism (5), the gap elimination mechanism (5) is arranged between the slider (1) and the opposite side of the vehicle body fixed plate (2) and moves with the front and rear movement of the slider (1), characterized in that: The cross-sectional shape of the slider moving seat (11) is hump-shaped, and the anti-clearance mechanism (5) is in an enveloping state and is in a clamping fit with the outer surface of the slider moving seat (11).

2. The electric angle adjustment device for the backrest of the rear seat of an automobile according to claim 1, characterized in that: The anti-clearance mechanism (5) comprises a pair of slider moving seat first compliant pads (51), a pair of slider moving seat second compliant pads (52), a car body fixed plate resisting frame (53), a compliant pad wing first shoe (54) and a compliant pad wing second shoe (55). The pair of slider moving seat first compliant pads (51) are in a right-tilted 90° splayed relationship with each other, and the right end faces are integrally formed with the left side of a first compliant pad wing (511). The space between the opposite sides of the pair of slider moving seat first compliant pads (51) constitutes a slider moving seat outer surface first clamping cavity (512). The pair of slider moving seat second compliant pads (52) are in a right-tilted 90° splayed relationship with each other, and the right end faces are integrally formed with the left side of a second compliant pad wing (521). The space between the opposite sides of the pair of slider moving seat second compliant pads (52) constitutes a slider moving seat outer surface second clamping cavity (522). The sizes of the slider moving seat outer surface first and second clamping cavities (512), (522) are the same and correspond to each other in front and back. The car body fixed plate resisting frame (53) has an upper resisting foot (531) extending from the upper end and a lower resisting foot (532) extending from the lower end. The upper and lower resisting feet (531, 532) slide against the left side of the car body fixed plate (2). The compliant pad wing first shoe (54) is located at the rear side of the car body fixed plate resisting frame (53) and integrally formed with the car body fixed plate resisting frame (53). The compliant pad wing first shoe (54) has a first compliant pad wing insertion cavity (541) with a shoe opening facing left. The first compliant pad wing (511) is inserted and fitted into the first compliant pad wing insertion cavity (541). The compliant pad wing second shoe (55) has a second compliant pad wing insertion cavity (551) with a shoe opening facing left. The second compliant pad wing (521) is inserted and fitted into the second compliant pad wing insertion cavity (551). The slider moving seat outer surface first and second clamping cavities (512, 522) are in a clamping fit with the slider moving seat (11) of the slider (1), and the pair of slider moving seat first and second compliant pads (51, 52) move with the movement of the slider moving seat (11).

3. The electric angle adjustment device for a backrest of a rear seat of a vehicle according to claim 1 or 2, characterized in that: A slider screw thread hole (111) is formed in the length direction of the slider moving seat (11) of the slider (1). The slider screw thread hole (111) is in a threaded fit with the slider screw (3) driven by the slider screw driving mechanism (4) fixed to the front side of the fixed plate front supporting wing (22).

4. The electric angle adjustment device for the backrest of the rear seat of an automobile according to claim 3, characterized in that: The screw driving connection shaft head (31) is a spline shaft head; the slider screw driving mechanism (4) comprises a motor (41) and a reduction box (42), the motor (41) has a power socket (411), the motor (41) is fixed in a longitudinal cantilever state with the downward side of the reduction box seat (421) of the reduction box (42), the motor shaft of the motor (41) faces upward and is drivingly connected with the reduction box (42), the reduction box (42) is fixed with the upward side of the reduction box seat (421), and the reduction box (42) is fixed with the front side of the fixed plate front supporting wing (22) through a group of reduction box body fixing screws (422) together with the reduction box seat (421) and the motor (41), the reduction box final stage power output wheel (423) of the reduction box (42) is drivingly matched with the screw driving connection shaft head (31) through the output wheel spline hole (4231) formed in the central position thereof.

5. The electric angle adjustment device for the backrest of the rear seat of an automobile according to claim 4, characterized in that: The motor (41) is a direct current brush motor with forward and reverse rotation functions.

6. The electric angle adjustment device for the backrest of the rear seat of an automobile according to claim 1, characterized in that: The slider screw (3) corresponds to the front between the pair of slider sliding guide rods (23) and forms an equilateral triangle or isosceles triangle distribution relationship with the pair of slider sliding guide rods (23).

7. The electric angle adjustment device for the backrest of the rear seat of an automobile according to claim 1, characterized in that: A slider upper sliding sleeve hole (12) is formed on the upper front side and rear side of the slider (1), a slider upper sliding sleeve (121) is inserted into the slider upper sliding sleeve hole (12), the slider upper sliding sleeve (121) forms a sliding pair with the upper slider sliding guide rod of the pair of slider sliding guide rods (23), a slider lower sliding sleeve hole (13) is formed on the lower front side and rear side of the slider (1), a slider lower sliding sleeve (131) is inserted into the slider lower sliding sleeve hole (13), and the slider lower sliding sleeve (131) forms a sliding pair with the lower slider sliding guide rod of the pair of slider sliding guide rods (23).

8. The electric angle adjustment device for the backrest of the rear seat of an automobile according to claim 2, characterized in that: The pair of slider moving seat first compliant blocks (51) and the pair of slider moving seat second compliant blocks (52) are rectangular bodies made of rubber, and the first compliant block wings (511) and the second compliant block wings (521) are made of rubber; the vehicle body fixed plate resisting frame (53), the compliant block wing first shoe (54), and the compliant block wing second shoe (55) are integrally molded from plastic.

9. The electric angle adjustment device for backrest of automobile rear seat according to claim 1, characterized in that: A slider screw shaft head limiting nut matching thread (32) is formed on the right end of the slider screw (3) and at the position of the rear side of the fixed plate rear supporting wing (21), a slider screw shaft head limiting nut (321) is screwed on the slider screw shaft head limiting nut matching thread (32); a guide rod limiting piece (231) for preventing the pair of slider sliding guide rods (23) from moving forward and backward is arranged at the rear end of the pair of slider sliding guide rods (23) and at the position of the rear side of the fixed plate rear supporting wing (21) and at the front end of the pair of slider sliding guide rods (23) and at the position of the front side of the fixed plate front supporting wing (22), and the guide rod limiting piece (231) is a circlip or a split pin.

10. A rear seat for a vehicle, characterized by: The application discloses a backrest electric angle adjusting device for a rear seat of an automobile.

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