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

Abstract

The invention 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 invention belongs to the technical field of vehicles, and in particular relates to an electric angle adjustment device for a rear seat backrest of an automobile, and also relates to a rear seat of an automobile. Background Art

[0002] The aforementioned rear seats of automobiles refer to seats installed at the rear of the automobile for passengers to sit on. They are usually composed of two independent seats, and the front and rear positions and backrest angles can be adjusted to accommodate passengers of different heights and body shapes. With the development of the automobile industry, people's requirements for automobiles are also expanding in depth and breadth. The angle adjustment function of the backrest (also called "seat back", the same below) of the rear seats of automobiles is created to meet the passengers' expectations for riding comfort. If the backrest angle is too steep and cannot be adjusted, the passengers will feel back discomfort and will have waist pain after riding for a long time.

[0003] There is no lack of technical information related to the rear seat backrest angle adjustment device in the published Chinese and foreign patent documents. For example, CN216610960U recommends "a rear seat backrest angle adjustment mechanism", CN211401214U provides "a rear seat backrest angle adjustment structure for automobiles", CN218519564U discloses "a rear seat backrest angle adjustment mechanism", CN205059321U introduces "a rear seat backrest angle adjustment mechanism for automobiles", CN211765085U announces "a backrest angle adjustment mechanism and vehicle track for rear seats of vehicles", and KR20130068949A discloses "a rear seat backrest adjustment mechanism for vehicles", etc.

[0004] As is known in the industry, a backlash-eliminating component or backlash-eliminating mechanism is usually provided in the structural system of the rear seat backrest angle adjustment device of a car. The positive significance of the backlash-eliminating mechanism is at least as follows: ensuring that the backrest is maintained in a stable state after adjustment and will not shake due to vibration (also called "vibration") during the driving of the vehicle or slight movements of the passenger, so as to provide good support for the passenger's back and help reduce fatigue caused by long-term riding; enhancing riding safety, because a stable seat backrest can enhance the passenger's body balance during the driving of the vehicle and avoid accidents caused by unstable center of gravity due to shaking, especially in the case of emergency braking or turning of the vehicle, the backlash-eliminating mechanism can ensure that the passenger's body is reliably supported, thereby improving the aforementioned safety; improving riding experience, the backlash-eliminating mechanism eliminates the gap of the seat backrest after adjustment, so that the fit between the seat backrest and the passenger's back is tighter, thereby improving riding comfort and stability, and reducing discomfort caused by seat shaking or gaps; extending the service life of the seat, because the backlash-eliminating mechanism can reduce the wear and looseness of the seat backrest during the adjustment process, which is very helpful in extending the service life of the seat. By maintaining the stability of the seat back, additional stress and wear caused by gaps can be avoided, improving the overall durability of the seat.

[0005] The structural system of "an electric angle adjustment mechanism for rear seats of automobiles" provided by Chinese patent CN204184217U has a rubber support pad assembly as a gap elimination mechanism, which is composed of a support pad installed on the bottom plate and a rubber pad installed on the support pad and in contact with the bottom of the support seat cushion (for details, please refer to paragraph 0032 of the patent specification and the corresponding drawings). Figure 3 ).

[0006] Although the rubber support pad assembly in the above-mentioned CN204184217U can play a role in eliminating clearance to a certain extent, there are the following deficiencies due to structural factors: Since one end of a pair of rubber pads in the structural system of the clearance elimination mechanism respectively extends into the slider grooves formed on the side of the slider facing the vehicle body fixing plate (referred to as the "bottom plate part" in the patent), and the other ends of the pair of rubber pads are respectively supported on the support pads in the structural system of the clearance elimination mechanism, and since the longitudinal cross-sectional shape of the support pad is in the shape of a "丄", the middle parts of the opposite sides of the pair of rubber pads respectively contact the two sides of the vertical part of the aforementioned "丄" shape. Therefore, the aforementioned clearance elimination mechanism composed of a pair of rubber pads and a support pad only plays a role in eliminating the clearance between the slider and the vehicle body fixing plate when the slider is in a certain specific angular state, such as when the car seat backrest is in a state tending to be perpendicular to the seat cushion (i.e., the "seat cushion") or when the backrest is only in a state of slight angular adjustment. The clearance elimination effect can basically meet the requirements. However, when the backrest angle is adjusted to a relatively large degree, the clearance elimination effect will be significantly inferior. In particular, the clearance elimination effect weakens as the backrest adjustment angle increases, and even the function is lost. This is because the structure of the clearance elimination mechanism does not have a semi-holding or semi-enveloping effect on a certain part of the slider; since the clearance elimination mechanism is located between the opposite sides of the slider and the vehicle body fixing plate in a single-point resisting support manner, when the vehicle encounters situations such as sudden braking, sharp turning, and severe bumpy vibrations during driving, gaps will appear in the single-point resistance, causing the backrest to shake, thus affecting the comfort of the passengers and even generating a sense of insecurity; due to the unreasonable structure, additional stress and wear will be generated due to the gap, affecting the overall durability of the rear car seat. Summary of the Invention

[0007] The object of the present invention is to provide an electric angle adjustment device for a rear car seat backrest, which helps the clearance elimination mechanism to effectively eliminate the clearance between the slider and the vehicle body fixing plate, so that the backrest can be maintained in a stable state and will not shake or produce annoying noises due to normal vehicle driving or the movement of the passenger's body. It is beneficial to form an ideal cooperation relationship between the clearance elimination mechanism and the slider, so as to avoid generating gaps between the slider and the vehicle body fixing plate and causing the backrest to tremble under conditions such as emergency braking, emergency turning, and severe bumps during vehicle driving, thus bringing a sense of insecurity to the passengers. It is also beneficial to avoid the wear of the clearance elimination mechanism itself, so as to ensure the overall durability of the seat.

[0008] Another object of the present invention is to provide a rear car seat that can fully embody the above technical effects of the electric angle adjustment device for the rear car seat backrest.

[0009] The task of the present invention is accomplished in this way: an electric angle adjustment device for a rear seat backrest of a vehicle comprises a slider, which is connected to the rear seat backrest of the vehicle by a lock hook in a use state, and a slider moving seat is formed in a horizontal state on the right side of the slider; a vehicle body fixing plate, which is fixed to the vehicle body in a use state, and a fixing plate rear supporting wing is folded and unfolded to the left at the rear end of the vehicle body fixing plate, and a fixing plate front supporting wing is folded and unfolded to the left at the front end, the fixing plate front and rear supporting wings correspond to each other front and back, and a pair of slider sliding guide rods are fixed between the opposite sides of the front and rear supporting wings of the fixing plate in a state parallel to each other up and down; a slider screw, the rear end of which is rotatably supported on the fixing plate rear supporting wing and extends to the rear side of the fixing plate rear supporting wing, and the front end of the slider screw is rotatably supported on the fixing plate front supporting wing On the supporting wing, the front end of the slider screw extends to the front side of the front supporting wing of the fixed plate and is extended with a screw transmission connecting shaft head, and the middle part of the slider screw is located between the opposite sides of the front and rear supporting wings of the fixed plate and corresponds to the left side between the pair of slider sliding guide rods, the slider and the pair of slider sliding guide rods constitute a sliding pair, and the slider moving seat is threadedly matched with the middle part of the slider screw; a slider screw driving mechanism, which is fixed to the front side of the front supporting wing of the fixed plate and is transmission-connected with the screw transmission connecting shaft head; an eliminating gap mechanism, which is arranged between the slider and the opposite sides of the vehicle body fixed plate and moves with the forward and backward movement of the slider, and is characterized in that the cross-sectional shape of the slider moving seat is hump-shaped, and the eliminating gap mechanism is in an enveloping state and is engaged with the outer surface of the slider moving seat.

[0010] In a specific embodiment of the present invention, the gap elimination mechanism includes a pair of first flexible pads of a slider moving seat, a pair of second flexible pads of a slider moving seat, a vehicle body fixed plate retaining frame, a first shoe of a flexible pad wing and a second shoe of a flexible pad wing. The first flexible pads of the pair of slider moving seats form an eight-shaped relationship tilted 90° to the right with each other, and the right end faces jointly form an integral structure with the left side face of a first flexible block wing. The space between the opposite sides of the first flexible pads of the pair of slider moving seats constitutes a first engaging cavity on the outer surface of the slider moving seat. The second flexible pads of the pair of slider moving seats form an eight-shaped relationship tilted 90° to the right with each other, and the right end faces jointly form an integral structure with the left side face of a second flexible block wing. The space between the opposite sides of the second flexible pads of the pair of slider moving seats constitutes a second engaging cavity on the outer surface of the slider moving seat. The first, The second engaging cavities are of the same size and correspond to each other front to back. An upper resisting foot extends from the upper end of the vehicle body fixed plate resisting frame, and a lower resisting foot extends from the lower end. The upper and lower resisting feet slide against the left side of the vehicle body fixed plate. The first boot of the flexible pad wing is located at the rear side of the body fixed plate resisting frame and forms an integral structure with the body fixed plate resisting frame. The first boot of the flexible pad wing is configured to have a first flexible block wing embedding cavity with a boot opening facing left, and the first flexible block wing is inserted and matched with the first flexible block wing embedding cavity, and the second boot of the flexible pad wing is configured to have a second flexible block wing embedding cavity with a boot opening facing left, and the second flexible block wing is inserted and matched with the second flexible block wing embedding cavity; the first and second engaging cavities on the outer surface of the slider moving seat are engaged with the slider moving seat of the slider, and the first and second flexible pads of the pair of slider moving seats move with the movement of the slider moving seat.

[0011] In another specific embodiment of the present invention, a slider screw mating threaded hole is formed in the length direction of the slider moving seat of the slider, and the slider screw mating threaded hole is mated with the slider screw thread driven by the slider screw driving mechanism fixed on the front side of the front supporting wing of the fixed plate.

[0012] In another specific embodiment of the present invention, the screw drive connection shaft head is a spline shaft head; the slider screw drive mechanism includes a motor and a reducer, the motor has a power socket, the motor is fixed to the downward side of the reducer seat of the reducer in a longitudinal cantilever state, the motor shaft of the motor faces upward and is transmission connected to the reducer, the reducer is fixed to the upward side of the reducer seat and the reducer is fixed to the front side of the front support wing of the fixed plate through a group of reducer case fixing screws together with the reducer seat and the motor, and the reducer final power output wheel of the reducer is transmission-matched with the screw drive connection shaft head through the output wheel spline hole formed in its central position.

[0013] In yet another specific embodiment of the present invention, the motor is a brushed DC motor with forward and reverse rotation functions.

[0014] In another specific embodiment of the present invention, the slider screw corresponds to the front between the pair of slider sliding guide rods and forms an equilateral triangle or an isosceles triangle distribution relationship with the pair of slider sliding guide rods.

[0015] In a more specific embodiment of the present invention, a slider upper sliding sleeve hole is respectively provided on the upper front side and the rear side of the slider, and a slider upper sliding sleeve is inserted in the slider upper sliding sleeve hole, and the slider upper sliding sleeve and the upper slider sliding guide rod of the pair of slider sliding guide rods constitute a sliding pair, and a slider lower sliding sleeve hole is respectively provided on the lower front side and the rear side of the slider, and a slider lower sliding sleeve is inserted in the slider lower sliding sleeve hole, and the slider lower sliding sleeve and the lower slider sliding guide rod of the pair of slider sliding guide rods constitute a sliding pair.

[0016] In a further specific embodiment of the present invention, the first flexible pads of the pair of slider moving seats and the second flexible pads of the pair of slider moving seats are in the shape of a rectangle and are made of rubber, and the material of the first flexible block wing and the second flexible block wing is rubber; the vehicle body fixed plate retaining frame, the first boot of the flexible pad wing and the second boot of the flexible pad wing are formed as an integrated structure by plastic molding.

[0017] In yet another specific embodiment of the present invention, a slider screw shaft head limiting nut mating thread is formed at the right end portion of the slider screw and at the rear side of the rear supporting wing of the fixed plate, and a slider screw shaft head limiting nut is screwed on the slider screw shaft head limiting nut mating thread; a guide rod limiting member for preventing a pair of slider sliding guide rods from moving forward and backward is respectively provided at the rear end of the pair of slider sliding guide rods and at the rear side of the rear supporting wing of the fixed plate and at the front end of the pair of slider sliding guide rods and at the front side of the front supporting wing of the fixed plate, and the guide rod limiting rod is a retaining spring or a cotter pin.

[0018] Another task of the present invention is accomplished in that a rear seat of a vehicle is provided with an electric angle adjustment device for a rear seat backrest of the vehicle.

[0019] The technical effect of the technical solution provided by the present invention 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 fixing plate so that the backrest can be maintained in a stable state and will not shake or make noise due to the normal driving of the vehicle or the 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 so as to avoid the generation of a gap between the slider and the vehicle body fixing plate when the vehicle is driving and encounters braking, emergency turns, and severe bumps, causing the backrest to tremble and bring a sense of fear of insecurity to the passenger; because the gap-eliminating mechanism can avoid the generation of a gap between it and the slider and the vehicle body fixing 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 It is a structural diagram of an embodiment of the present invention; Figure 2 for Figure 1 The structural diagram of the anti-backlash mechanism shown; Figure 3 for Figure 1 Schematic diagram after assembly is completed; Figure 4 for Figure 1 The schematic diagram shown is a diagram of the anti-backlash mechanism cooperating with the slider moving seat of the slider. DETAILED DESCRIPTION

[0021] 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 is not a limitation of the present invention. Any equivalent changes made based on the concept of the present invention that are merely formal and not substantial should be regarded as within the scope of the technical solution of the present invention.

[0022] In the following description, all concepts related to up, down, left, right, front and back directions or orientations are based on the current Figure 1 The position state is taken as a reference, and thus it cannot be understood as a special limitation on the technical solution provided by the present invention.

[0023] See also Figure 1 and Figure 2, shows a slider 1 (also known as a "sliding plate" in the industry), which is connected to the rear seat backrest of the automobile through a lock hook 6 when in use, and a slider moving seat 11 is formed in a horizontal state on the right side of the slider 1; shows a vehicle body fixing plate 2, which is fixed to the vehicle body when in use, and a fixing plate rear support wing 21 is folded to the left at the rear end of the vehicle body fixing plate 2, and a fixing plate front support wing 22 is folded to the left 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 up and down; shows a slider screw 3, the rear end of the slider screw 3 is rotatably supported on the fixing plate rear support wing 21 through the slider screw rear bearing seat 33 or the slider screw rear sleeve and extends to the rear side of the fixing plate rear support wing 21, the slider screw 3 The front end is rotatably supported on the front supporting wing 22 of the fixed plate by the front bearing seat 34 of the slider screw or the front shaft sleeve of the slider screw. The front end of the slider screw 3 extends to the front side of the front supporting wing 22 of the fixed plate and is extended with 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 supporting wings 22, 21 of the fixed plate and corresponds to the left side between the aforementioned pair of slider sliding guide rods 23. The aforementioned slider 1 and the pair of slider sliding guide rods 23 constitute a sliding pair, and the aforementioned slider moving seat 11 is threadedly matched with the middle part of the slider screw 3; a slider screw driving mechanism 4 is shown, which is fixed on the front side of the aforementioned fixed plate front supporting wing 22 and is transmission-connected to the aforementioned screw transmission connection shaft head 31; an anti-backlash mechanism 5 is shown, which is arranged between the aforementioned slider 1 and the opposite side of the aforementioned vehicle body fixed plate 2 and moves with the forward and backward movement of the slider 1.

[0024] Depend on Figure 1 As shown, a pair of lock hook fixing column holes 14 are provided on the slider 1, and a pair of lock hook fixing columns 61 extend from the right end of the lock hook 6. The pair of lock hook fixing columns 61 are inserted into the pair of lock hook fixing column holes 14 and fixed to the left side of the slider 1 by welding or fasteners at positions corresponding to the pair of lock hook fixing column holes 14. In the use state, the left end of the lock hook 6 is connected to the connecting hook head of the rear seat backrest of the car (located on the rear seat backrest of the car). As a preferred solution, a lock hook reinforcement plate 62 can also be provided at the right end of the cavity (U-shaped cavity) of the lock hook 6. In actual use, the hook head on the rear seat backrest of the automobile is usually designed to be hooked (hooked) or unhooked with the lock hook member 6. This is because when the backrest is tilted and folded toward the seat as needed in certain circumstances, the backrest cannot be flipped forward, i.e., toward the seat, without unhooking the hook head connecting the backrest and the lock hook member 6.

[0025] exist Figure 1 It is shown that the upper and lower parts of the body plate 2 are each extended with a body fixing plate fixing wing plate 24 in a folded state (usually formed by sheet metal stamping), and a wing plate fixing hole 241 is provided on the body fixing plate fixing wing plate 24. In the use state, the body fixing plate fixing wing plate 24 is fixed to the body by fasteners and bolts through the wing plate fixing holes 241 at a position corresponding to the C-pillar position of an automobile, such as a sedan. The aforementioned C-pillar is a pillar on both sides of the rear windshield of the automobile, located at the rear of the vehicle body. The function of the C-pillar is to support the roof and the rear windshield. It is an important part of the vehicle structure and helps to maintain the overall stability and strength of the vehicle body. The C-pillar can bear a certain amount of collision energy to protect the safety of the rear passengers. The C-pillar plays a role in vehicle design that makes the overall lines of the vehicle body more smooth and beautiful.

[0026] Since the more specific contents of the vehicle body fixing base plate 1 described in the present invention being fixed to the vehicle body when in use can also be referred to the specification content and its drawings of Chinese Patent Authorization Announcement No. CN211765085U mentioned by the applicant in the above background technology column, and the above-mentioned lock hook member 6 is also fixedly connected to the rear seat backrest of the automobile when in use, which can also be referred to CN211765085U, the applicant will not explain this in detail below.

[0027] As the technical key points of the technical solution provided by the present invention, the present invention makes the cross-section of the slider moving seat 11 into a hump shape, and the clearance elimination mechanism 5 is engaged with the outer surface of the slider moving seat 11 in an enveloping state.

[0028] Since the word "hump" has different interpretations in different situations, for example, the hump involved in the field of electronics and electrical is essentially a relatively abstract wave crest. Therefore, the applicant explains the hump in the present invention as follows: the hump referred to in the present invention is a description of the cross-sectional shape of a specific object, that is, the cross-sectional shape of the slider moving seat 11 is limited to the shape of the meat hump on the back of a camel.

[0029] The aforementioned enveloping state in the present invention refers to the fact that the clearance eliminating mechanism 5 is in an embracing fit with the outer surface of the slider moving seat 11, that is, the three surfaces of the hump-shaped outer surface tending to be C-shaped or V-shaped.

[0030] See also Figure 4 And combined with Figure 1 and Figure 2The aforementioned clearance elimination mechanism 5 comprises a pair of first flexible pads 51 of the slider moving seat, a pair of second flexible pads 52 of the slider moving seat, a vehicle body fixed plate abutment frame 53, a first shoe 54 of the flexible pad wing and a second shoe 55 of the flexible pad wing. The first flexible pads 51 of the pair of slider moving seats form an eight-shaped relationship with each other, which are tilted 90° to the right (i.e., they are inverted 90° to the right) and the right end faces jointly form an integral structure with the left side face of a first flexible block wing 511. The first flexible pads 51 of the pair of slider moving seats are opposite to each other. The space between the two sides constitutes the first engaging cavity 512 on the outer surface of the slider moving seat, and the second flexible pads 52 of the pair of slider moving seats form an eight-shaped relationship with each other, which are tilted 90° to the right (i.e., they are tilted 90° to the right), and the right end faces together form an integral structure with the left side face of a second flexible block wing 521, and the space between the two opposite sides of the second flexible pads 52 of the pair of slider moving seats constitutes the second engaging cavity 522 on the outer surface of the slider moving seat. The first and second engaging cavities 512 and 522 on the outer surface of the slider moving seat are of similar size. The upper end of the vehicle body fixing plate retaining frame 53 is extended with an upper retaining foot 531, and the lower end is extended with a lower retaining foot 532. The upper and lower retaining feet 531, 532 are slidably abutted against the left side of the aforementioned vehicle body fixing plate 2. The first boot 54 of the flexible pad wing is located at the rear side of the vehicle body fixing plate retaining frame 53 and forms an integral structure with the vehicle body fixing plate retaining frame 53. The first boot 54 of the flexible pad wing is formed with a boot opening facing left. The first flexible block wing is embedded in the cavity 541. 11 is inserted and matched with the first flexible block wing embedded cavity 541, the second flexible liner wing boot 55 is formed with a second flexible block wing embedded cavity 551 with a boot opening facing left, and the aforementioned second flexible block wing 521 is inserted and matched with the second flexible block wing embedded cavity 551; the first and second engaging cavities 512 and 522 on the outer surface of the aforementioned slider moving seat are engaged with the slider moving seat 11 of the aforementioned slider 1 and the first and second flexible liner blocks 51 and 52 of the aforementioned pair of slider moving seats move with the movement of the aforementioned slider moving seat 11.

[0031] A slider screw mating threaded hole 111 is formed in the length direction of the slider moving seat 11 of the aforementioned slider 1, and the slider screw mating threaded hole 111 is threadedly mated with the aforementioned slider screw 3 driven by the aforementioned slider screw driving mechanism 4 fixed on the front side of the aforementioned fixed plate front supporting wing 22.

[0032] Depend on Figure 1 and Figure 2 As shown, the first and second engaging cavities 512, 522 on the outer surface of the slider moving seat respectively expand from right to left, that is, toward the slider moving seat 11, so as to meet the requirement of reliable enveloping engagement with the slider moving seat 11 having a hump-shaped cross-sectional shape.

[0033] See also Figure 1 and Figure 4, the aforementioned screw transmission connection shaft head 31 is a spline shaft head; the aforementioned slider screw drive mechanism 4 includes 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 facing downward in a longitudinal cantilever state, the motor shaft of the motor 41 faces upward and is transmission connected to the reduction box 42, the reduction box 42 is fixed to the side of the reduction box seat 421 facing upward and the reduction box 42 is fixed to the front side of the front support wing 22 of the aforementioned fixed plate 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 transmission-matched with the aforementioned screw transmission connection shaft head 31 through the output wheel spline hole 4231 formed in its central position.

[0034] Preferably, screw-fixed connecting columns 221 are extended in a horizontal cantilever state on the front side of the front support wing 22 of the aforementioned fixed plate, and the positions thereof correspond to the aforementioned reduction gearbox housing fixing screws 422 and the number thereof is equal (3 in this embodiment, but not limited to this number), and the reduction gearbox housing fixing screws 422 are fixed to the screw-fixed connecting columns 221.

[0035] In this embodiment, the motor 41 is a brushed DC motor with forward and reverse rotation functions.

[0036] Depend on Figure 1 and Figure 3 As shown, the aforementioned slider screw 31 corresponds to the front between the aforementioned pair of slider sliding guide rods 23 and forms an equilateral triangle distribution relationship with the pair of slider sliding guide rods 23, and can also form an isosceles triangle distribution relationship. The equilateral and isosceles triangle distribution relationship mentioned here refers to the positional relationship observed in a transverse sectional state.

[0037] Depend on Figure 1 As shown, a slider upper sleeve hole 12 is respectively provided on the upper front side and the rear side of the aforementioned slider 1, and a slider upper sleeve 121 is inserted and embedded in the slider upper sleeve hole 12, and the slider upper sleeve 121 and the slider sliding guide rod located at the upper part of the aforementioned pair of slider sliding guide rods 23 constitute a sliding pair, and a slider lower sleeve hole 13 is respectively provided on the lower front side and the rear side of the aforementioned slider 1, and a slider lower sleeve 131 is inserted and embedded in the slider lower sleeve hole 13, and the slider lower sleeve 131 and the slider sliding guide rod located at the lower part of the aforementioned pair of slider sliding guide rods 23 constitute a sliding pair.

[0038] The aforementioned pair of first compliant pads 51 of the slider moving seat and the pair of second compliant pads 52 of the slider moving seat are in the shape of a rectangle (in the present embodiment, they are in the shape of a cuboid) and are made of rubber. The aforementioned first compliant block wing 51 and the second compliant block wing 521 are made of rubber. The aforementioned vehicle body fixing plate retaining frame 53, the first compliant pad wing shoe 54 and the aforementioned second compliant pad wing shoe 55 are preferably formed of plastic molding as an integrated structure.

[0039] Preferably, a slider screw shaft head limiting nut mating thread 32 is formed at the right end of the slider screw 3 and at the rear side of the fixed plate rear support wing 21, and a slider screw shaft head limiting nut 321 is screwed on the slider screw shaft head limiting nut mating thread 32; preferably, a guide rod limiting member 231 for preventing the pair of slider sliding guide rods 23 from moving forward and backward is provided at the rear end of the pair of slider sliding guide rods 23 and at the rear side of the fixed plate rear support wing 21 and at the front end of the pair of slider sliding guide rods 23 and at the front side of the fixed plate front support wing 22, respectively. The guide rod limiting rod 231 adopts a retaining spring in this embodiment, but a split pin can also be used. Since the retaining spring is used in this embodiment, a retaining spring groove 232 is provided at the front and rear ends of the pair of slider sliding guide rods 23 and at the position corresponding to the retaining spring as the guide rod limiting member 231, and the retaining spring is inserted into the retaining spring groove 232. If a split pin is used, the retaining spring groove is replaced by a split pin insertion hole.

[0040] The present invention also provides a rear seat for a car not shown in the figure, which is provided with an electric angle adjustment device for a rear seat backrest of the car with the above-mentioned structure.

[0041] The applicant briefly describes the working principle of the present invention. By operating the switch arranged on the side of the seat or other reasonable positions, the motor 41 of the structural system of the slider screw driving motor 4 is operated, and the motor 41 is decelerated by the reduction box 42 and the screw transmission connecting shaft head 31 is driven by the final power output wheel 423 of the reduction box to rotate the slider screw 3. The rotation of the slider screw 3 causes the slider moving seat 11, which is threadedly matched with the slider screw 3 through the slider screw matching threaded hole 111, to move along the slider screw 3 together with the slider 1 and slide along a pair of slider sliding guide rods 23. At the same time, the slider 1 drives the rear seat back of the car to tilt forward or backward through the lock hook 6 to change the backrest angle. The tilting forward or backward of the backrest depends on the forward or backward movement of the slider 1, and the forward or backward movement of the slider depends on the forward or reverse rotation of the slider screw 3, and the forward or reverse rotation of the slider screw 3 depends on the clockwise or counterclockwise operation of the motor 41, and the clockwise or counterclockwise operation of the motor 41 depends on the aforementioned operation mode of the switch by the occupant. During the forward or backward displacement of the slider 1, since the first and second compliant pads 51 and 52 of each pair of slider moving seats of the structure system of the clearance eliminating mechanism 5 form a reliable enveloping engagement relationship with the slider moving seat 11, they can maintain a good step-by-step relationship with the slider 1. In particular, no gap will appear between the clearance eliminating mechanism 5 and the slider 1 and between the slider and the vehicle body fixing plate 2 in situations such as sudden braking, sharp turns, and severe bumps of the vehicle. The degree of adjustment of the seat back angle is usually based on the comfort level that the occupant feels better.

[0042] In summary, the technical solution provided by the present invention makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects stated by the applicant 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 a fixing plate rear support wing (21) is folded and unfolded at the rear end of the vehicle body fixing plate (2), and a fixing plate front support wing (22) is 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 rod (3), the rear end of the slider screw rod (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 rod (3) is The front end is rotatably supported on the front supporting wing (22) of the fixed plate, the front end of the slider screw (3) extends to the front side of the front supporting 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 supporting 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 supporting wing (22) of the fixed plate and is transmission-connected to the screw transmission connection shaft head (31); a clearance eliminating mechanism (5), the clearance eliminating mechanism (5) is arranged between the slider (1) and the opposite side of the vehicle body fixed plate (2) and moves with the forward and backward movement of the slider (1), characterized in that: The cross-section of the slider moving seat (11) is in a hump shape, and the clearance eliminating mechanism (5) is in an enveloping state and is engaged with the outer surface of the slider moving seat (11).

2. The electric angle adjustment device for rear seat backrest of a vehicle according to claim 1, characterized in that: The anti-backlash mechanism (5) comprises a pair of first flexible pads (51) of the slider moving seat, a pair of second flexible pads (52) of the slider moving seat, a vehicle body fixed plate blocking frame (53), a first shoe (54) of the flexible pad wing and a second shoe (55) of the flexible pad wing. The first flexible pads (51) of the pair of slider moving seats form an eight-shaped relationship with a rightward tilt of 90 degrees, and the right end faces together form an integral structure with the left side face of a first flexible block wing (511). The space between the opposite sides of the first flexible pads (51) of the pair of slider moving seats is The first engaging cavity (512) is formed on the outer surface of the slider moving seat, a pair of second flexible pads (52) of the slider moving seat form an eight-shaped relationship with each other tilted to the right by 90 degrees, and the right end faces are jointly formed with the left side face of a second flexible block wing (521) to form an integral structure, and the space between the opposite sides of the second flexible pads (52) of the pair of slider moving seats forms the second engaging cavity (522) on the outer surface of the slider moving seat, and the first and second engaging cavities (512) and (522) on the outer surface of the slider moving seat are of the same size and correspond to each other front and back, and are fixed on the vehicle body. An upper stop foot (531) extends from the upper end of the plate stop frame (53), and a lower stop foot (532) extends from the lower end. The upper and lower stop feet (531, 532) are slidably abutted against the left side of the vehicle body fixing plate (2). The first boot (54) of the flexible pad wing is located at the rear side of the vehicle body fixing plate stop frame (53) and forms an integral structure with the vehicle body fixing plate stop frame (53). The first boot (54) of the flexible pad wing is formed with a first flexible block wing embedding cavity (541) with a boot opening facing left. The first flexible block wing (511) and the first flexible block wing are connected to each other. The compliant block wing is inserted and matched with the cavity (541), and the second boot (55) of the compliant liner wing is formed with a second compliant block wing inserted and matched with the cavity (551) with the boot opening facing left, and the second compliant block wing (521) is inserted and matched with the second compliant block wing inserted and matched with the cavity (551); the first and second engaging cavities (512, 522) on the outer surface of the slider moving seat are engaged with the slider moving seat (11) of the slider (1), and the first and second compliant liner blocks (51, 52) of the pair of slider moving seats move with the movement of the slider moving seat (11).

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

4. The electric angle adjustment device for rear seat backrest of a vehicle according to claim 3, characterized in that: The screw drive 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) facing downward in a longitudinal cantilever state; the motor shaft of the motor (41) faces upward and is transmission-connected to the reduction box (42); the reduction box (42) is fixed to the side of the reduction box seat (421) facing upward and the reduction box (42) is fixed to the front side of the front support wing (22) of the fixed plate 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 transmission-matched with the screw drive connecting shaft head (31) through the output wheel spline hole (4231) formed at its central position.

5. The electric angle adjustment device for rear seat backrest of a vehicle according to claim 4, characterized in that: The motor (41) is a brushed DC motor with forward and reverse rotation functions.

6. The electric angle adjustment device for rear seat backrest of a vehicle according to claim 1, characterized in that: The slider screw rod (31) corresponds to the front between the pair of slider sliding guide rods (23) and forms an equilateral triangle or an isosceles triangle distribution relationship with the pair of slider sliding guide rods (23).

7. The electric angle adjustment device for rear seat backrest of a vehicle according to claim 1, characterized in that: A slider upper sleeve hole (12) is provided on the upper front side and the rear side of the slider (1), and a slider upper sleeve (121) is inserted into the slider upper sleeve hole (12). The slider upper sleeve (121) and the slider sliding guide rod (23) located at the upper part form a sliding pair. A slider lower sleeve hole (13) is provided on the lower front side and the rear side of the slider (1), and a slider lower sleeve (131) is inserted into the slider lower sleeve hole (13). The slider lower sleeve (131) and the slider sliding guide rod (23) located at the lower part form a sliding pair.

8. The electric angle adjustment device for rear seat backrest of a vehicle according to claim 2, characterized in that: The first flexible pads (51) of the pair of slider moving seats and the second flexible pads (52) of the pair of slider moving seats are rectangular in shape and are made of rubber; the first flexible block wing (51) and the second flexible block wing (521) are made of rubber; the vehicle body fixing plate retaining frame (53), the first flexible pad wing boot (54) and the second flexible pad wing boot (55) are formed by plastic molding to form an integrated structure.

9. The electric angle adjustment device for rear seat backrest of a vehicle according to claim 1, characterized in that: A slider screw shaft head limiting nut mating thread (32) is formed at the right end of the slider screw (3) and located at the rear side of the rear support wing (21) of the fixed plate, and a slider screw shaft head limiting nut (321) is screwed onto the slider screw shaft head limiting nut mating thread (32); at the rear end of the pair of slider sliding guide rods (23) and located at the rear side of the rear support wing (21) of the fixed plate and at the front end of the pair of slider sliding guide rods (23) and located at the front side of the front support wing (22) of the fixed plate, a guide rod limiting member (231) for preventing the pair of slider sliding guide rods (23) from moving forward and backward is provided, and the guide rod limiting rod (231) is a retaining spring or a cotter pin.

10. A rear seat for a car, characterized in that: An electric angle adjustment device for a rear seat backrest of an automobile as claimed in claim 1 is provided.

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