Turnover locking mechanism of automobile seat backrest

Abstract

The invention relates to an overturning locking mechanism of an automobile seat backrest, which comprises a seat frame and two hinge assemblies symmetrically arranged on the left side and the right side of the seat frame, the hinge assembly comprises a hinge strip rotationally connected to the outer wall of the left side or the right side of the seat frame and a locking shaft transversely fixed to the outer wall of the corresponding side of the seat frame, located behind the rotation axis of the hinge strip and used for supporting and positioning the hinge strip. The locking assembly is arranged between one hinge strip and the seat frame; the locking assembly comprises a locking piece, and the middle of the locking piece is rotatably connected to the outer wall of one hinge strip and always has the trend of elastic reset rotation in the clockwise direction. On the premise that the safety performance of the automobile seat is ensured, the requirement for installing an angle adjuster is omitted, so that the manufacturing cost is effectively reduced, the assembling difficulty is effectively reduced, and the assembling efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile seats, and in particular to a flip locking mechanism for an automobile seat backrest. Background Art

[0002] In recent years, the global new energy vehicle industry has developed rapidly. With the entry of various new car manufacturers, price competition in the automotive industry has become increasingly fierce. Manufacturers have begun to focus on cost control of new energy vehicles, and then manufacture products that meet the needs of various income groups at the lowest cost, thereby increasing the core competitiveness of their products.

[0003] In order to ensure the safe driving performance of the car, the parts related to the safe driving performance of the car cannot be reduced, so manufacturers can only start with other parts that do not affect the safe driving performance of the car to reduce the manufacturing cost of the car. Car seats are one of the aspects that can control the manufacturing cost.

[0004] Like traditional fuel vehicles, the seat cushions on new energy vehicles can also be flipped forward and laid flat when needed to temporarily expand the space inside the vehicle, and then used to transport some larger items. However, in order to achieve the above-mentioned flipping and laying flat effect, existing car seat cushions must be installed with recliners on the seat cushions. Although recliners are already relatively popular, their internal structure is relatively complex, so their manufacturing costs are still high, and they are difficult to assemble because they must go through multiple welding and riveting processes to fix them on the seat frame. The operating steps are relatively cumbersome, resulting in low assembly efficiency.

[0005] Therefore, it urgently needs to be resolved. Summary of the invention

[0006] In view of the current status of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a flip locking mechanism for a car seat backrest which can effectively reduce the manufacturing cost while ensuring the safety performance of the car seat, and also effectively reduce the assembly difficulty to improve the assembly efficiency.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: a flip locking mechanism for a car seat back, characterized in that it includes a seat frame and two hinge assemblies symmetrically arranged on the left and right sides of the seat frame, the hinge assembly includes a hinge bar rotatably connected to the left or right outer wall of the seat frame and a locking shaft transversely fixed to the corresponding side outer wall of the seat frame and located behind the rotation axis of the hinge bar for supporting and positioning the hinge bar; Also included is a locking assembly disposed between one of the hinge bars and the seat frame; The locking assembly comprises a locking plate, the middle portion of which is rotatably connected to the outer wall of one of the hinge strips and always has a tendency to elastically return and rotate in a clockwise direction; When the hinge bar rotates clockwise to the top of a locking shaft on the same side and is blocked by the locking shaft and cannot continue to rotate, the lower end of the locking plate is arranged behind the locking shaft and can be detachably fixed on the locking shaft by using its own clockwise elastic force to reset the rotation trend; When the upper end of the locking plate rotates counterclockwise, the lower end of the locking plate can overcome its own clockwise elastic force to return to rotation and separate from the locking shaft; The locking assembly also includes a handle fixed on the upper end of the locking plate.

[0008] Preferably, a locking groove is provided at the lower end of the locking plate toward one side edge of the locking shaft, the inner width of the locking groove matches the outer diameter of the locking shaft, and the opening direction of the locking groove matches the position of the locking shaft.

[0009] Preferably, when the hinge bar rotates clockwise to above a locking shaft on the same side and is blocked by the locking shaft and cannot continue to rotate, the locking groove on the locking plate can be detachably snapped onto the outside of the locking shaft by utilizing the clockwise elastic force of the locking plate to reset the rotation trend; when the locking groove is snapped onto the outside of the locking shaft, the opening of the locking groove is arranged horizontally forward or tilted toward the front and upward.

[0010] Preferably, the locking assembly also includes a limit pin laterally fixed on an outer wall of one side of the hinge bar close to the locking plate and located above and behind the rotation axis of the locking plate. Correspondingly, a V-shaped notch higher than the rotation axis of the locking plate is provided on a side edge of the locking plate facing the limit pin, and the upper inner wall of the V-shaped notch cooperates with the limit pin, and a first arc-shaped limit surface that cooperates with the limit pin is formed between the lower edge of the opening of the V-shaped notch and the outer wall of one side where the V-shaped notch is located.

[0011] Preferably, the locking assembly also includes a rotating shaft that is laterally and rotatably inserted into the locking plate, the central axis of the rotating shaft coincides with the rotation axis of the locking plate, and the end of the rotating shaft facing the hinge bar is fixed on an outer wall of the hinge bar close to the locking plate.

[0012] Preferably, the locking assembly further comprises a torsion spring sleeved on the rotating shaft and between the hinge bar and the locking plate, wherein both ends of the torsion spring are respectively fixed on the locking plate and the limit pin so that the locking plate always has a tendency to elastically return and rotate in the clockwise direction.

[0013] Preferably, the locking assembly also includes a safety switch, which includes a rotary sleeve that is concentrically and rotationally damped connected to the rotating shaft and located outside the side of the locking plate facing away from the hinge bar, a first connecting rod fixed to the outer peripheral surface of the front side of the rotary sleeve, a slider movably connected in the hinge bar to have the function of moving back and forth radially along the rotating shaft, a second connecting rod rotatably connected to the slider and located on the same side of the locking plate, and a limiting column transversely fixed to the slider and located behind the second connecting rod, and the end of the second connecting rod is rotatably connected to the end of the first connecting rod.

[0014] Preferably, the middle front edge of the locking plate is formed with an arc-shaped guide surface which is arranged concentrically with the rotation axis of the locking plate and is located in front of and below the rotation axis of the locking plate. The arc-shaped guide surface is also provided with radially distributed limit notches, and the position and width of the limit notches are matched with the position and outer diameter of the limit column.

[0015] Preferably, a through hole is provided in the middle of the hinge bar, and one end of the rotating shaft facing the hinge bar is inserted and fixed in the through hole. A radially distributed guide groove is also provided on the front lower inner wall of the through hole, and the slider is movably embedded in the guide groove.

[0016] Preferably, the safety switch further comprises two pressure plates respectively fixed on the left and right outer walls of the slider and respectively slidably fitted on the left and right outer walls of the hinge bar, and the second connecting rod is rotatably connected to a pressure plate located on the same side of the locking plate.

[0017] Compared with the prior art, the advantages of the present invention are: the present invention achieves the control effect of locking and unlocking the flip state of the car seat cushion with the help of a locking component with a simple structure and easy manufacturing, and can effectively support and position the seat cushion to ensure the firmness of the seat and prevent the seat cushion from accidentally loosening due to external force, thereby eliminating the need to install a recliner while ensuring the safety performance of the car seat, thereby effectively reducing the manufacturing cost, and also effectively reducing the difficulty of assembly to improve assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other features, advantages and aspects of the embodiments of the present application will become more apparent with reference to the following specific embodiments in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the accompanying drawings are schematic, and the originals and elements are not necessarily drawn to scale. In the accompanying drawings: Figure 1 It is a right-side structural diagram of the present invention.

[0019] Figure 2 It is a right side structural diagram of the locking plate of the present invention.

[0020] Figure 3 It is a right side structural diagram of the hinge strip of the present invention.

[0021] Figure 4 It is a right view structural diagram of the safety switch of the present invention.

[0022] Figure 5 It is a front structural diagram of the slider and the pressure plate of the present invention.

[0023] Figure 6 It is a right side structural diagram of the locking plate of the present invention when the rotation is restricted by the safety switch. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be construed as being limited to the embodiments described herein. On the contrary, these embodiments are provided for a more thorough and complete understanding of the present application. It should be understood that the drawings and embodiments of the present application are for exemplary purposes only and are not intended to limit the scope of protection of the present application.

[0025] It should be understood that the various steps described in the method implementation of the present application can be performed in different orders and / or in parallel. In addition, the method implementation may include additional steps and / or omit the steps shown, and the scope of the present application is not limited in this respect.

[0026] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the relevant definitions of other terms will be given in the following description.

[0027] It should be noted that the concepts such as "first" and "second" mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0028] It should be noted that the modifications of "one" and "plurality" mentioned in the present application are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0029] like Figures 1 to 6As shown, a flip locking mechanism for a car seat backrest comprises a seat frame 1 and two hinge assemblies symmetrically arranged on the left and right sides of the seat frame 1, wherein the hinge assembly comprises a hinge bar 2 rotatably connected to the left or right outer wall of the seat frame 1 and a locking shaft 4 transversely fixed to the corresponding side outer wall of the seat frame 1 and located behind the rotation axis of the hinge bar 2 for supporting and positioning the hinge bar 2; When the end of the hinge bar 2 rotates clockwise to the top of the locking shaft 4, the hinge bar 2 will be blocked by the locking shaft 4 and cannot continue to rotate, so as to play a positioning role. The outer wall of the hinge bar 2 facing the locking shaft 4 will be pressed against the locking shaft 4. When the hinge bar 2 is subjected to pressure from the passenger's back, the locking shaft 4 can effectively support the hinge bar 2. It also includes a locking assembly disposed between one of the hinge bars 2 and the seat frame 1; The locking assembly includes a locking plate 3, the middle portion of which is rotatably connected to the outer wall of one of the hinge strips 2 and always has a tendency to elastically return and rotate in a clockwise direction; When the hinge bar 2 rotates clockwise to the top of a locking shaft 4 on the same side and is blocked by the locking shaft 4 and cannot continue to rotate, the lower end of the locking plate 3 is arranged behind the locking shaft 4 and can be detachably fixed on the locking shaft 4 by using its own clockwise elastic force to restore the rotation trend; When the upper end of the locking plate 3 rotates counterclockwise, the lower end of the locking plate 3 can overcome its own clockwise elastic force to return to rotation and separate from the locking shaft 4 .

[0030] A locking groove 31 is formed at the lower end of the locking plate 3 toward one side edge of the locking shaft 4 . The inner width of the locking groove 31 matches the outer diameter of the locking shaft 4 , and the opening direction of the locking groove 31 matches the position of the locking shaft 4 .

[0031] When the hinge bar 2 rotates clockwise to above a locking shaft 4 on the same side and is blocked by the locking shaft 4 and cannot continue to rotate, the locking groove 31 on the locking plate 3 can be detachably buckled on the outside of the locking shaft 4 by utilizing the clockwise elastic force of the locking plate 3 to return to the rotation trend.

[0032] When the locking groove 31 is engaged with the outside of the locking shaft 4, the opening of the locking groove 31 is arranged horizontally forward or tilted forward and upward, but it cannot be tilted forward and downward, because if the hinge bar 2 is accidentally thrust forward, this thrust will generate a pulling force toward the front and upward on the locking plate 3 by virtue of the rotational connection between the hinge bar 2 and the seat frame 1. If the opening of the locking groove 31 is tilted toward the front and downward, the locking shaft 4 will force the lower end of the locking plate 3 to rotate counterclockwise without authorization, thereby causing the locking groove 31 to disengage from the locking shaft 4.

[0033] The locking assembly also includes a limit pin 5 which is transversely fixed on the outer wall of one side of the hinge bar 2 close to the locking plate 3 and located above and behind the rotation axis of the locking plate 3. Correspondingly, a V-shaped notch 32 which is higher than the rotation axis of the locking plate 3 is provided on the edge of one side of the locking plate 3 facing the limit pin 5.

[0034] The upper inner wall of the V-shaped notch 32 cooperates with the limiting pin 5 , and a first arc-shaped limiting surface 33 that cooperates with the limiting pin 5 is formed between the lower edge of the opening of the V-shaped notch 32 and the outer wall of one side where the V-shaped notch 32 is located.

[0035] The locking assembly also includes a rotating shaft 7 which is laterally and rotatably inserted into the locking plate 3, the central axis of the rotating shaft 7 coincides with the rotation axis of the locking plate 3, and one end of the rotating shaft 7 facing the hinge bar 2 is fixed on the outer wall of the hinge bar 2 close to the locking plate 3.

[0036] The locking assembly also includes a torsion spring 6 sleeved on the rotating shaft 7 and between the hinge bar 2 and the locking plate 3. The two ends of the torsion spring 6 are respectively fixed on the locking plate 3 and the limit pin 5 so that the locking plate 3 always has a tendency to elastically return and rotate in the clockwise direction.

[0037] The locking assembly also includes a safety switch 8, which includes a rotary sleeve 81 that is concentrically and dampedly connected to the rotating shaft 7 and located outside the side of the locking plate 3 facing away from the hinge strip 2, a first connecting rod 82 fixed to the outer peripheral surface of the front side of the rotary sleeve 81, a slider 85 movably connected in the hinge strip 2 to have the function of moving back and forth radially along the rotating shaft 7, a second connecting rod 83 rotatably connected to the slider 85 and located on the same side of the locking plate 3, and a limiting column 86 transversely fixed to the slider 85 and located behind the second connecting rod 83, and the end of the second connecting rod 83 is rotatably connected to the end of the first connecting rod 82.

[0038] An arcuate guide surface 34 is formed on the middle front edge of the locking plate 3, which is coaxially arranged with the rotation axis of the locking plate 3 and located in front of and below the rotation axis of the locking plate 3. The arcuate guide surface 34 is also provided with radially distributed limiting notches 35, and the position and width of the limiting notches 35 are coordinated with the position and outer diameter of the limiting column 86.

[0039] A through hole 21 is provided in the middle of the hinge bar 2, and one end of the rotating shaft 7 facing the hinge bar 2 is inserted and fixed in the through hole 21. A radially distributed guide groove 22 is also provided on the front lower inner wall of the through hole 21, and the slider 85 is movably embedded in the guide groove 22.

[0040] The safety switch 8 also includes two pressure plates 84 respectively fixed on the left and right outer walls of the slider 85 and slidably attached to the left and right outer walls of the hinge bar 2. The second connecting rod 83 is rotatably connected to a pressure plate 84 located on the same side of the locking plate 3.

[0041] The locking assembly also includes a handle 9 fixed to the upper end of the locking plate 3 .

[0042] Directions: A seat cushion is installed on the top of the seat frame 1, and a back cushion is installed above the seat cushion between the two hinge strips 2. The passenger can sit on the seat cushion and lean his back on the back cushion to use it normally. At this time, the passenger's back pressure is applied backwards to the back cushion. Since each hinge strip 2 is pressed against a locking shaft 4 on the same side at this time, the thrust exerted on the back cushion will be transmitted to the locking shaft 4 with the help of the hinge strip 2, and then transmitted to the seat frame 1 to achieve offset, so that the back cushion can effectively support the passenger's back.

[0043] Since the two ends of the torsion spring 6 are respectively fixed on the locking plate 3 and the limit pin 5, the torsion spring 6 will always apply a clockwise rotation force to the locking plate 3, so that the lower end of the locking plate 3 always exerts a forward pressure on a locking shaft 4 on the same side, so that the locking groove 31 on the locking plate 3 is always engaged with the outside of the locking shaft 4; at this time, even if the cushion is pushed forward, this thrust will generate a pulling force on the locking plate 3 toward the front and upward by virtue of the rotational connection relationship between the hinge bar 2 and the seat frame 1, but Since the locking shaft 4 is located inside the locking groove 31, the locking plate 3 will not rotate, so the two hinge bars 2 and the cushion will not swing, thereby achieving an effective locking function; and since the opening of the locking groove 31 is arranged horizontally forward or inclined forward and upward, no matter how large the unexpected thrust of the hinge bar 2 is, the locking shaft 4 cannot force the lower end of the locking plate 3 to rotate counterclockwise without authorization, thereby effectively preventing the locking groove 31 from detaching from the locking shaft 4 and being accidentally unlocked, thereby improving the firmness and reliability of the locking.

[0044] When unlocking, holding the handle 9 with your hand and pushing it forward can drive the locking plate 3 to rotate counterclockwise, and then the locking groove 31 on the locking plate 3 swings backward to disengage the locking shaft 4 until the first arc-shaped limit surface 33 contacts the limit pin 5. At this time, the locking plate 3 can no longer rotate, and the unlocking operation is completed; thereafter, the cushion is pushed forward to drive the ends of the two hinge bars 2 to swing forward until the cushion contacts the seat cushion, so that the cushion is laid down; when the ends of the two hinge bars 2 swing forward, you can release the handle 9 with your hand, and the rebound force of the torsion spring 6 drives the locking plate 3 to rotate clockwise and reset until the upper inner wall of the V-shaped notch 32 contacts the limit pin 5. At this time, the locking plate 3 can no longer rotate, and the handle 9 also follows the rotation of the locking plate 3 and tends to be horizontal to avoid bulging upward.

[0045] However, before rotating the locking plate 3, since the limiting column 86 is located in the limiting notch 35, the locking plate 3 cannot be rotated, and it is necessary to hold the rotary sleeve 81 in the safety switch 8 by hand and rotate it counterclockwise, and then use the first connecting rod 82 to drive the second connecting rod 83 to move forward and downward while rotating clockwise, thereby driving the slider 85 to move along the guide groove 22 in the direction away from the locking plate 3, and then drive the limiting column 86 out of the limiting notch 35. At this time, the locking plate 3 is released from the restriction, and then the rotary sleeve 81 can be released, and the rotary sleeve 81 will automatically stay due to its damping rotation relationship with the rotating shaft 7, and will not shift.

[0046] When the locking plate 3 is in the locked state and the back cushion is in the unfolded use state, in order to effectively prevent the handle 9 from being accidentally pushed forward, it is necessary to hold the rotating sleeve 81 with your hand and rotate it clockwise, and then drive the second connecting rod 83 to move backward and upward while rotating counterclockwise, thereby driving the slider 85 to move along the guide groove 22 in the direction close to the locking plate 3 until the limit post 86 completely enters the limit notch 35. At this time, if the handle 9 is accidentally pushed forward, the locking plate 3 is restricted by the limit post 86 with the help of the limit notch 35, so it cannot rotate counterclockwise. This effectively prevents the locking plate 3 from being accidentally rotated and unlocked, thereby fully ensuring safety and simple and convenient operation.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flip locking mechanism for a car seat back, characterized in that: The invention comprises a seat frame and two hinge assemblies symmetrically arranged on the left and right sides of the seat frame, wherein the hinge assembly comprises a hinge bar rotatably connected to the left or right outer wall of the seat frame and a locking shaft transversely fixed to the corresponding side outer wall of the seat frame and located behind the rotation axis of the hinge bar for supporting and positioning the hinge bar; Also included is a locking assembly disposed between one of the hinge bars and the seat frame; The locking assembly comprises a locking plate, the middle portion of which is rotatably connected to the outer wall of one of the hinge strips and always has a tendency to elastically return and rotate in a clockwise direction; When the hinge bar rotates clockwise to the top of a locking shaft on the same side and is blocked by the locking shaft and cannot continue to rotate, the lower end of the locking plate is arranged behind the locking shaft and can be detachably fixed on the locking shaft by using its own clockwise elastic force to reset the rotation trend; When the upper end of the locking plate rotates counterclockwise, the lower end of the locking plate can overcome its own clockwise elastic force to return to rotation and separate from the locking shaft; The locking assembly also includes a handle fixed on the upper end of the locking plate.

2. The flip locking mechanism for a car seat back according to claim 1, characterized in that: A locking groove is provided at the lower end of the locking plate toward one side edge of the locking shaft, the inner width of the locking groove matches the outer diameter of the locking shaft, and the direction of the opening of the locking groove matches the position of the locking shaft.

3. The flip locking mechanism of a car seat back according to claim 2, characterized in that: When the hinge bar rotates clockwise to above a locking shaft on the same side and is blocked by the locking shaft and cannot continue to rotate, the locking groove on the locking plate can be detachably buckled on the outside of the locking shaft by utilizing the clockwise elastic force of the locking plate to restore the rotation trend; when the locking groove is buckled on the outside of the locking shaft, the opening of the locking groove is arranged horizontally forward or inclined toward the front and upward.

4. The flip locking mechanism for a car seat back according to claim 1, characterized in that: The locking assembly also includes a limit pin laterally fixed on an outer wall of one side of the hinge bar close to the locking plate and located above and behind the rotation axis of the locking plate. Correspondingly, a V-shaped notch higher than the rotation axis of the locking plate is provided on an edge of the locking plate facing the limit pin. The upper inner wall of the V-shaped notch cooperates with the limit pin, and a first arc-shaped limit surface that cooperates with the limit pin is formed between the lower edge of the opening of the V-shaped notch and the outer wall of one side where the V-shaped notch is located.

5. The flip locking mechanism for a car seat back according to claim 4, characterized in that: The locking assembly also includes a rotating shaft that is laterally and rotatably inserted into the locking plate, the center axis of the rotating shaft coincides with the rotation axis of the locking plate, and one end of the rotating shaft facing the hinge bar is fixed on an outer wall of the hinge bar close to the locking plate.

6. The flip locking mechanism for a car seat back according to claim 5, characterized in that: The locking assembly also includes a torsion spring sleeved on the rotating shaft and between the hinge bar and the locking plate. The two ends of the torsion spring are respectively fixed on the locking plate and the limit pin so that the locking plate always has a tendency to elastically return and rotate in the clockwise direction.

7. The flip locking mechanism for a car seat back according to claim 5, characterized in that: The locking assembly also includes a safety switch, which includes a rotary sleeve that is concentrically and dampedly connected to the rotating shaft and located outside the side of the locking plate facing away from the hinge bar, a first connecting rod fixed to the outer peripheral surface of the front side of the rotary sleeve, a slider movably connected in the hinge bar to have the function of moving back and forth radially along the rotating shaft, a second connecting rod rotatably connected to the slider and located on the same side of the locking plate, and a limiting column transversely fixed to the slider and located behind the second connecting rod, and the end of the second connecting rod is rotatably connected to the end of the first connecting rod.

8. The flip locking mechanism for a car seat back according to claim 7, characterized in that: The front edge of the middle part of the locking plate is formed with an arc-shaped guide surface which is arranged concentrically with the rotation axis of the locking plate and is located in front of and below the rotation axis of the locking plate. The arc-shaped guide surface is also provided with radially distributed limiting notches, and the position and width of the limiting notches are matched with the position and outer diameter of the limiting column.

9. The flip locking mechanism for a car seat back according to claim 7, characterized in that: A through hole is provided in the middle of the hinge bar, and one end of the rotating shaft facing the hinge bar is inserted and fixed in the through hole. A radially distributed guide groove is also provided on the front lower inner wall of the through hole, and the slider is movably embedded in the guide groove.

10. The flip locking mechanism for a car seat back according to claim 7, characterized in that: The safety switch also includes two pressure plates respectively fixed on the left and right outer walls of the slider and respectively slidably attached to the left and right outer walls of the hinge bar. The second connecting rod is rotatably connected to a pressure plate located on the same side of the locking plate.

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