Leg support structure and automobile seat thereof

Abstract

The invention discloses a leg support structure and an automobile seat thereof, and belongs to the technical field of automobile seat accessories. Comprising a support mechanism. The pair of basic unfolding mechanisms are arranged in a left-right corresponding state, the rear ends of the basic unfolding mechanisms are hinged to the support mechanism, and the driving beam is pivoted between the opposite sides of the rear ends of the pair of basic unfolding mechanisms; the basic leg bracket is arranged between the pair of basic unfolding mechanisms; the rear end of the driving beam actuating screw rod is in transmission fit with the driving mechanism, and the front end of the driving beam actuating screw rod is connected with the driving beam; the device is characterized by further comprising a pair of re-extension mechanisms and an additional leg supporting frame, the pair of re-extension mechanisms are arranged in a left-right corresponding state, the rear ends of the pair of re-extension mechanisms are hinged to the front ends of the pair of basic unfolding mechanisms, and the additional leg supporting frame is arranged between the front ends of the pair of re-extension mechanisms. The device has the advantages that the device can be unfolded and stretched again on the premise of a single driving mechanism, the structure is simplified, and the fault probability is reduced; the method is economical, cheap and resource-saving.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive seat accessories, and specifically relates to a leg rest structure and also to its automotive seat. Background Art

[0002] As is known to all, leg rests are usually equipped on the seats of relatively high-end luxury vehicles and mid-to-high-end vehicles to provide a comfortable riding experience. The positive significance of configuring leg rests includes at least the following aspects: relieving lumbar fatigue and tiredness; improving driving safety; enhancing riding comfort; reflecting good personalized support; enhancing lumbar support and thus helping to reduce lumbar spine pressure, playing a role in health protection; improving the interior decoration effect of the vehicle, and so on.

[0003] Technical information related to leg rests can be found in the disclosed Chinese and foreign patent documents. For example, CN212386376U recommends "a leg rest adjustment structure for an automotive seat", CN210011655U provides "an improved structure for adjusting an automotive leg rest", TW201538363A introduces "a fast-type foot-lifting device for vehicles", CN117382514B announces "a leg rest device for an automotive seat", and German Patent DE202019103838U1 discloses "an electric sofa frame", and so on. The common feature of these patents is not limited to those listed above. They can be both unfolded and restored, but the common drawback is that they cannot be extended again as needed after being unfolded. Because the inability to extend as needed after unfolding limits the support length of the occupant's lower legs and is insufficient to obtain the desired comfort. For tall occupants, the fatigue of the lower limbs is often particularly prominent.

[0004] The "four-way leg rest mechanism for an automotive seat" disclosed in CN215436135U has the function of continuing to extend after being unfolded. Its structure consists of a bracket assembly, a multi-link riveting assembly, and an upper cover plate assembly. Objectively, this patent can achieve the technical effects described in paragraph 0022 of its specification. However, since a leg rest extension screw motor and a leg rest rotation screw motor are respectively used in the structural system of the upper cover plate assembly and in the structural system where the multi-link riveting assembly is connected to the bracket assembly, that is, two drive mechanisms each equipped with a motor are required to respectively achieve opening (unfolding) and re-extension (specifically, see paragraph 0029 of the specification of this patent). Therefore, not only is the overall structure not concise, but also the failure probability is doubled compared to a single drive mechanism equipped with a motor. It is not conducive to reflecting low cost and is insufficient to reflect the principle of resource conservation. Summary of the Invention

[0005] The object of the present invention is to provide a leg rest structure which helps to significantly simplify the overall structure, reduce the failure probability, reflect the principle of resource conservation, and adapt to the spirit of a conservation-oriented and energy-saving economy while achieving both deployment and re-elongation with only a single drive mechanism.

[0006] Another object of the present invention is to provide an automotive seat that can fully embody the technical effects of the leg rest structure.

[0007] The object of the present invention is achieved as follows: A leg rest structure includes a bracket mechanism for fixing to the automotive seat frame in the use state; a drive beam and a pair of basic deployment mechanisms. The pair of basic deployment mechanisms are arranged in a left-right corresponding state with each other and the rear ends are hinged to the bracket mechanism. The drive beam is pivotally arranged between the rear ends of the pair of basic deployment mechanisms facing each other; a basic leg rest bracket is arranged between the pair of basic deployment mechanisms; a drive mechanism and a drive beam actuating screw. The drive mechanism is fixed on the bracket mechanism, the rear end of the drive beam actuating screw is in transmission cooperation with the drive mechanism, and the front end of the drive beam actuating screw is connected to the drive beam. It is characterized in that it further includes a pair of re-elongation mechanisms and an additional leg support. The pair of re-elongation mechanisms are arranged in a left-right corresponding state with each other and the rear ends of the pair of re-elongation mechanisms are hinged to the front ends of the pair of basic deployment mechanisms. The additional leg support is arranged between the front ends of the pair of re-elongation mechanisms.

[0008] In a specific embodiment of the present invention, the bracket mechanism includes a left fixing plate of the automotive seat frame, a right fixing plate of the automotive seat frame, and a fixing plate connecting support beam. The left and right fixing plates of the automotive seat frame are arranged in a left-right corresponding state with each other and are fixed to the facing sides of the automotive seat frame in the use state. The fixing plate connecting support beam is fixed between the facing sides of the left and right fixing plates of the automotive seat frame; the rear ends of the pair of basic deployment mechanisms arranged in a left-right corresponding state with each other are respectively hinged to the opposite sides of the front ends of the left fixing plate of the automotive seat frame and the right fixing plate of the automotive seat frame; the drive mechanism is fixed in the middle of the length direction of the fixing plate connecting support beam; the drive beam actuating screw is connected to the middle of the length direction of the drive beam.

[0009] In another specific embodiment of the present invention, each of the pair of base deployment mechanisms includes a driving link, a rear articulated link of the base leg bracket, a middle articulated link of the base leg bracket, a follower link, and a support arm of the base leg bracket. The rear end of the driving link is articulated to the upper front of the right fixed plate of the vehicle seat frame, the front end of the driving link is articulated to the lower end of the middle articulated link of the base leg bracket, and the middle of the driving link is respectively articulated to the right end of the driving beam and the middle of the rear articulated link of the base leg bracket. The upper end of the rear articulated link of the base leg bracket is articulated to the rear end of the support arm of the base leg bracket, and the lower end of the rear articulated link of the base leg bracket is articulated to the front end of the follower link. The middle articulated link of the base leg bracket is located in front of the rear articulated link of the base leg bracket and forms a parallel relationship with the rear articulated link of the base leg bracket. The upper end of the middle articulated link of the base leg bracket is articulated to the support arm of the base leg bracket. The follower link forms a parallel relationship with the driving link, and the rear end of the driving link is articulated to the lower front of the right fixed plate of the vehicle seat frame. The base leg bracket is arranged between the support arms of the base leg brackets of the pair of base deployment mechanisms. Each of the pair of further elongation mechanisms is articulated to the front end and the middle of the support arm of the base leg bracket and is also articulated to the rear articulated link of the base leg bracket in a state where the additional leg support is carried.

[0010] In yet another specific embodiment of the present invention, the base leg bracket includes a front support plate of the base leg bracket, a rear support plate of the base leg bracket, and a connecting plate of the support plates. The front and rear support plates of the base leg bracket are parallel to each other front and rear and are spaced apart from each other between the upward-facing sides of the support arms of the pair of base deployment mechanisms fixed thereto. The left and right ends of the front and rear support plates of the base leg bracket protrude beyond the support arms of the base leg bracket for fixing the leg rest cushion. The connecting plate of the support plates is fixed to the front and rear support plates of the base leg bracket at the middle position corresponding to the length direction of the front and rear support plates of the base leg bracket.

[0011] In yet another specific embodiment of the present invention, each of the pair of re-elongation mechanisms includes an additional leg support main link, an additional leg support transition link, an additional leg support fixed arm traction link, an additional leg support fixed arm, and a main link support connecting rod. The rear end of the additional leg support main link is hinged to the upper end of the rear end hinge link of the base leg bracket, and the front end of the additional leg support main link is hinged to the rear end of the additional leg support transition link. The additional leg support transition link is located in front of the middle hinge link of the base leg bracket and forms a parallel relationship with the middle hinge link of the base leg bracket. The middle of the additional leg support transition link is hinged to the middle of the support arm of the base leg bracket, and the front end of the additional leg support transition link is hinged to the rear end of the additional leg support fixed arm traction link. The front end of the additional leg support fixed arm traction link is hinged to the middle of the additional leg support fixed arm. The rear end of the additional leg support fixed arm is hinged to the front end of the support arm of the base leg bracket. The front end of the additional leg support fixed arm is configured as a fixed arm cantilever end. The additional leg support is fixed between the upper parts of the fixed arm cantilever ends of the additional leg support fixed arms of the pair of re-elongation mechanisms, and the left end and the right end of the additional leg support each protrude from the side of the fixed arm cantilever end for fixing the leg support cushion. The main link support connecting rod is fixed between the opposite sides of the middle parts of the pair of additional leg support main links.

[0012] In still another specific embodiment of the present invention, at the middle of the support arm of the base leg bracket and at a position corresponding to the middle of the additional leg support transition link, there is a lobe-shaped extension extending downward. The middle of the additional leg support transition link is hinged to the middle of the support arm of the base leg bracket at a position corresponding to the lobe-shaped extension.

[0013] In yet another specific embodiment of the present invention, the shapes of the left fixing plate of the vehicle seat frame and the right fixing plate of the vehicle seat frame are fan-shaped. A vehicle seat frame left fixing plate fixing bolt hole is provided at each of the rear end and the middle of the left fixing plate of the vehicle seat frame, and a vehicle seat frame right fixing plate fixing bolt hole is provided at each of the rear end and the middle of the right fixing plate of the vehicle seat frame. In the use state, the left and right fixing plates of the vehicle seat frame are respectively fixed to the vehicle seat frame by fixing bolts at positions corresponding to the vehicle seat frame left and right fixing plate fixing bolt holes.

[0014] In yet another specific embodiment of the present invention, the driving mechanism includes a motor, a worm and worm gear box, a worm and worm gear box seat, and a worm and worm gear box seat fixing bracket. The motor is arranged in a cantilever state on the right side of the worm and worm gear box. The worm formed on the motor shaft of the motor meshes with the worm gear located in the worm and worm gear box. The worm and worm gear box is arranged in the accommodating cavity of the worm and worm gear box seat. The worm and worm gear box seat is fixed to the worm and worm gear box seat fixing bracket, and the worm and worm gear box seat fixing bracket is fixed to the rear side of the middle part in the length direction of the connecting support beam of the fixed plate. The rear end of the driving beam actuating screw is in transmission cooperation with the worm gear center hole formed on the worm gear, and a screw fixing ear is formed at the front end of the driving beam actuating screw. The screw fixing ear is fixed to the screw fixing ear seat through a screw fixing ear screw, and the screw fixing ear seat is fixed to the middle part in the length direction of the driving beam.

[0015] In yet another more specific embodiment of the present invention, the motor is a DC motor with forward and reverse functions.

[0016] Another object of the present invention is achieved as follows. An automobile seat has the leg rest structure.

[0017] Since the technical solution provided by the present invention only needs to use one driving mechanism, and since the rear end of the additionally provided re-elongation mechanism is hinged to the front ends of a pair of basic unfolding mechanisms, and the additional leg support is arranged between the front ends of a pair of re-elongation mechanisms, when the driving mechanism works, it drives the driving beam actuating screw, the driving beam actuating screw drives the driving beam, the driving beam drives a pair of basic unfolding mechanisms to act and drives a pair of re-elongation mechanisms together with the additional leg support to unfold through the basic unfolding mechanisms. Compared with the prior art, it can realize unfolding and meet the requirement of re-elongation on the premise of relying on a single driving mechanism, significantly simplifying the overall structure and reducing the failure probability; it is beneficial to reflect economy and save resources, thus adapting to the current society's advocated spirit of thrift and energy conservation in the economy; the provided automobile seat can fully reflect the technical effects of the leg rest structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of an embodiment of the present invention; Figure 2 It is Figure 1 a schematic view observed from the right side; Figure 3 It is from Figure 1 and Figure 2 a three-dimensional structural schematic view of the transition from the unfolded use state shown to the folded non-use state; Figure 4 It is Figure 3 a schematic view observed from the right side of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to more clearly understand the technical essence and beneficial effects of the present invention, the applicant will make a detailed description below in the form of embodiments. However, the descriptions of the embodiments are not limitations on the technical solutions of the present invention. Any formal but non-substantive equivalent transformation made based on the concept of the present invention should be regarded as falling within the scope of the technical solutions of the present invention.

[0020] In the following description, all directional or positional concepts such as up, down, left, right, front, and back are based on the current position state Figure 1 and thus should not be construed as special limitations on the technical solutions provided by the present invention.

[0021] Please refer to Figure 1 and Figure 2 , which shows a bracket mechanism 1 for fixing to an automotive seat frame in a use state. Of course, the bracket mechanism 1 can also be fixed to the seat pan of the automotive seat. Therefore, whether the bracket mechanism 1 is fixed to the automotive seat frame or to the seat pan should be considered an equivalent fixing method; it shows a drive beam 2 and a pair of base deployment mechanisms 3. The pair of base deployment mechanisms 3 are arranged in a left-right corresponding state with each other and the rear ends are hinged to the aforementioned bracket mechanism 1. The drive beam 2 is pivotally arranged between the opposite sides of the rear ends of the pair of base deployment mechanisms 3. Since the drive beam 2 is a hollow tubular structure, it can be referred to as a tube beam; it shows a base leg bracket 4, and the base leg bracket 4 is arranged between the pair of base deployment mechanisms 3; it shows a drive mechanism 5 and a drive beam actuating screw 6. The drive mechanism 5 is fixed to the aforementioned bracket mechanism 1. The rear end of the drive beam actuating screw 6 is in transmission cooperation with the drive mechanism 5, and the front end of the drive beam actuating screw 6 is connected to the aforementioned drive beam 2.

[0022] As the technical key points of the technical solution provided by the present invention: the provided leg rest structure further includes a pair of re-elongation mechanisms 7 and an additional leg support 8. The pair of re-elongation mechanisms 7 are arranged in a left-right corresponding state with each other and the rear ends of the pair of re-elongation mechanisms 7 are hinged to the front ends of the aforementioned pair of base deployment mechanisms 3. The additional leg support 8 is arranged between the front ends of the pair of re-elongation mechanisms 7.

[0023] The foregoing bracket mechanism 1 includes a left fixing plate 11 of an automobile seat frame, a right fixing plate 12 of the automobile seat frame, and a connecting support beam 13 of the fixing plates. The left and right fixing plates 11 and 12 of the automobile seat frame correspond to each other left and right and are fixed to the opposite sides of the automobile seat frame or the seat basin in the use state. The connecting support beam 13 of the fixing plates is fixed between the opposite sides of the left and right fixing plates 11 and 12 of the automobile seat frame. The rear ends of the pair of basic unfolding mechanisms 3 arranged in a left-right corresponding state are respectively hinged to the sides of the front ends of the foregoing left fixing plate 11 of the automobile seat frame and the right fixing plate 12 of the automobile seat frame that face away from each other (back to back). The foregoing driving mechanism 5 is fixed to the middle of the length direction of the foregoing connecting support beam 13 of the fixing plates. The foregoing driving beam actuating screw 6 is connected to the middle of the length direction of the foregoing driving beam 2.

[0024] Since the pair of basic unfolding mechanisms 3 includes one basic unfolding mechanism each on the left side and the right side and with the same structure, the applicant's description below is for one basic unfolding mechanism on the right side. It includes a driving link 31, a rear-end hinged link 32 of the basic leg bracket, a middle-part hinged link 33 of the basic leg bracket, a follower link 34, and a support arm 35 of the basic leg bracket. The rear end of the driving link 31 is hinged to the upper front part of the foregoing right fixing plate 12 of the automobile seat frame through a rear-end hinged shaft 311 of the driving link. The front end of the driving link 31 is hinged to the lower end of the middle-part hinged link 33 of the basic leg bracket through a front-end hinged shaft 312 of the driving link. The middle part of the driving link 31 is pivotally fitted with the right end of the foregoing driving beam 2 and is also hinged to the middle part of the rear-end hinged link 32 of the basic leg bracket through a middle-part hinged shaft 313 of the driving link. The upper end of the rear-end hinged link 32 of the basic leg bracket is hinged to the rear end of the support arm 35 of the basic leg bracket through an upper-end hinged shaft 321 of the rear-end hinged link of the basic leg bracket. The lower end of the rear-end hinged link 32 of the basic leg bracket is hinged to the front end of the follower link 34 through a lower-end hinged shaft 322 of the rear-end hinged link of the basic leg bracket. The middle-part hinged link 33 of the basic leg bracket is located in front of the rear-end hinged link 32 of the basic leg bracket and forms a parallel relationship with the rear-end hinged link 32 of the basic leg bracket. The upper end of the middle-part hinged link 33 of the basic leg bracket is hinged to the support arm 35 of the basic leg bracket through an upper-end hinged shaft 331 of the middle-part hinged link of the basic leg bracket. The follower link 34 forms a parallel relationship with the driving link 31 and the rear end of the driving link 34 is hinged to the lower front part of the foregoing right fixing plate 12 of the automobile seat frame through a rear-end hinged shaft 341 of the follower link. The foregoing basic leg bracket 4 is arranged between the support arms 35 of the pair of basic unfolding mechanisms 3. The foregoing pair of re-elongation mechanisms 7 are each hinged to the front end and the middle part of the foregoing support arm 35 of the basic leg bracket and are also hinged to the rear-end hinged link 32 of the basic leg bracket in the state of carrying the foregoing additional leg support 8.

[0025] The foregoing base leg bracket 4 includes a front support plate 41 of the base leg bracket, a rear support plate 42 of the base leg bracket, and a support plate connecting plate 43. The front and rear support plates 41, 42 of the base leg bracket are parallel to each other front and back, spaced from each other, and preferably welded between the upward-facing sides of the base leg bracket support arms 35 of the foregoing pair of base deployment mechanisms 3. The left and right ends of the front and rear support plates 41, 42 of the base leg bracket protrude beyond the base leg bracket support arms 35 respectively for fixing the leg support cushions (externally wrapped with cushions). The support plate connecting plate 43 is preferably welded and fixed to both the front and rear support plates 41, 42 of the base leg bracket at the central position corresponding to the length direction of the front and rear support plates 41, 42 of the base leg bracket.

[0026] Since the pair of re-elongation mechanisms 7 includes one re-elongation mechanism on the left side and one re-elongation mechanism on the right side with the same structure, the applicant's description below is for one re-elongation mechanism on the right side.

[0027] Continue to see Figure 1 and Figure 2 As mentioned above, each of the pair of re-elongation mechanisms 7 includes an additional leg support main link 71, an additional leg support transition link 72, an additional leg support fixed arm traction link 73, an additional leg support fixed arm 74, and a main link support connecting rod 75. The rear end of the additional leg support main link 71 is hinged to the upper end of the rear end hinged link 32 of the foregoing base leg bracket through the rear end hinged shaft 711 of the additional leg support main link, and the front end of the additional leg support main link 71 is hinged to the rear end of the additional leg support transition link 72 through the front end hinged shaft 712 of the additional leg support main link. The additional leg support transition link 72 is located in front of the middle hinged link 33 of the foregoing base leg bracket and forms a parallel relationship with the middle hinged link 33 of the base leg bracket. The middle of the additional leg support transition link 72 is hinged to the middle of the foregoing base leg bracket support arm 35 through the middle hinged shaft 721 of the leg support transition link, and the front end of the additional leg support transition link 72 is hinged to the rear end of the additional leg support fixed arm traction link 73 through the front end hinged shaft 722 of the additional leg support transition link. The front end of the additional leg support fixed arm traction link 73 is hinged to the middle of the additional leg support fixed arm 74 through the front end hinged shaft 731 of the traction link. The rear end of the additional leg support fixed arm 74 is hinged to the front end of the base leg bracket support arm 35 through the rear end hinged shaft 742 of the additional leg support fixed arm. The front end of the additional leg support fixed arm 74 is configured as a fixed arm cantilever end 741. The foregoing additional leg support 8 is preferably welded and fixed between the upper parts of the foregoing fixed arm cantilever ends 741 of the additional leg support fixed arms 74 of the pair of re-elongation mechanisms 7. The left and right ends of the additional leg support 8 protrude beyond the sides of the fixed arm cantilever end respectively for fixing the leg support cushions (externally wrapped with cushions). The main link support connecting rod 75 is fixed between the opposite sides of the middle parts of the pair of additional leg support main links 71.

[0028] As shown by Figure 1 and Figure 2 in the middle of the foregoing base leg bracket support arm 35 and at a position corresponding to the middle of the additional leg rest transition link 72, there extends downward an earlobe-shaped extension 351. The middle of the foregoing additional leg rest transition link 72 is hinged to the middle of the base leg bracket support arm 35 through the foregoing leg rest transition link middle hinge shaft 721 at a position corresponding to the earlobe-shaped extension 351.

[0029] The shapes of the foregoing left fixing plate 11 of the vehicle seat frame and the right fixing plate 12 of the vehicle seat frame are fan-shaped. At the rear end and the middle of the left fixing plate 11 of the vehicle seat frame, there is respectively provided a fixing bolt hole 111 for the left fixing plate of the vehicle seat frame. At the rear end and the middle of the right fixing plate 12 of the vehicle seat frame, there is respectively provided a fixing bolt hole 121 for the right fixing plate of the vehicle seat frame. In the use state, the left and right fixing plates 11 and 12 of the vehicle seat frame are respectively fixed to the vehicle seat frame by fixing bolts at positions corresponding to the fixing bolt holes 111 and 121 for the left and right fixing plates of the vehicle seat frame.

[0030] Please refer to Figure 1 , the foregoing drive mechanism 5 includes a motor 51, a worm and worm gear box 52, a worm and worm gear box seat 53 and a worm and worm gear box seat fixing bracket 54. The motor 51 is arranged in a cantilever state on the right side of the worm and worm gear box 52. A worm (not shown in the figure) formed on the motor shaft of the motor 51 meshes with a worm gear (not shown in the figure) located in the worm and worm gear box 52. The worm and worm gear box 52 is arranged in the worm and worm gear box seat accommodating cavity 531 of the worm and worm gear box seat 53. The worm and worm gear box seat 53 is fixed to the worm and worm gear box seat fixing bracket 54, and the worm and worm gear box seat fixing bracket 54 is fixed to the rear side of the middle part in the length direction of the foregoing fixing plate connection support beam 13. The rear end of the foregoing drive beam actuating screw 6 is in transmission cooperation with the worm gear center hole formed on the worm gear, and a screw fixing ear 61 is formed at the front end of the drive beam actuating screw 6. The screw fixing ear 61 is fixed to the screw fixing ear seat 612 through a screw fixing ear screw 611, and the screw fixing ear seat 612 is fixed to the middle part in the length direction of the foregoing drive beam 2. Since the structure and action mechanism of the foregoing drive mechanism 5 mentioned above belong to the prior art, for example, reference can be made to CN111660901A (a leg rest drive device for a vehicle seat), the applicant only makes a brief description.

[0031] In this embodiment, the foregoing motor is a DC motor with a forward and reverse function, and the motor is electrically connected to the vehicle-mounted power supply.

[0032] Please refer to Figure 3 and Figure 4 and in combination with Figure 1 and Figure 2, the rider operates the operation switch provided on the side of the seat. For example, when the structure of the present invention is to be in the Figure 1 and Figure 2 shown deployed state, the operation switch is operated to make the motor 51 of the structural system of the drive mechanism 5 work. The worm thread on the motor shaft drives the worm in the worm and worm gear box 52 to move, and the movement of the worm drives the drive beam actuating screw 6 with the effect of a worm gear shaft to rotate clockwise. Since the front end of the drive beam actuating screw 6 is fixed through its screw fixing ear 61 and by means of the screw fixing ear screw 611 to the screw fixing ear seat 612, and since the screw fixing ear seat 612 is fixedly welded to the middle part in the length direction of the aforementioned drive beam 2, the drive beam 2 is driven to rotate by the drive beam actuating screw 6. The drive beam 2 drives the drive link 31. Under the action of the drive link 31, the upper end of the rear-end articulated link 32 of the base leg bracket is driven to tilt forward, and the lower end of the rear-end articulated link 32 of the base leg bracket drives the follower link 34 and makes the follower link 34 displace backward. During the process of the upper end of the rear-end articulated link 32 of the base leg bracket tilting forward or displacing forward, since the upper end of the rear-end articulated link 32 of the base leg bracket is articulated to the rear end of the base leg bracket support arm 35 through the upper-end articulated shaft 321 of the rear-end articulated link of the base leg bracket, the base leg bracket support arm 35 is driven to displace forward. During the process of the base leg bracket support arm 35 displacing forward, since the middle articulated link 33 of the base leg bracket is articulated to the base leg bracket support arm 35 through the upper-end articulated shaft 331 of the middle articulated link of the base leg bracket, the upper end of the middle articulated link 33 of the base leg bracket is also driven to tilt forward by the base leg bracket support arm 35, so that the base leg bracket support arm 35 together with the aforementioned base leg bracket 4 is deployed. From Figure 1 and Figure 2 shown, since a parallelogram relationship is jointly formed by the front side of the right fixed plate 12 of the vehicle seat frame, the rear end of the drive link 31, the follower link 34, and the lower end of the rear-end articulated link 32 of the base leg bracket, and a parallelogram relationship is jointly formed by the front end of the drive link 31, the upper end of the rear-end articulated link 32 of the base leg bracket, the rear end of the base leg bracket support arm 35, and the middle articulated link 33 of the base leg bracket, a situation where one movement causes all related parts to move can be achieved.

[0033] Since the technical key point of the present invention, i.e., a pair of additional re-extension mechanisms 7, the rear ends of the pair of re-extension mechanisms 7 are hinged to the front ends of the basic leg bracket support arms 35 of the structural system of a pair of basic unfolding mechanisms 3 in a mutually corresponding state, and are hinged to the upper ends of the aforementioned basic leg bracket rear end hinged connecting rods 32. Specifically, the rear ends of the additional leg bracket main connecting rods 71 ​​of the structural system of the pair of re-extension mechanisms 7 are hinged to the upper ends of the basic leg bracket rear end hinged connecting rods 32 through the additional leg bracket main connecting rod rear end hinge shaft 711, while the front ends are hinged to the rear ends of the additional leg bracket transition connecting rods 72 through the additional leg bracket main connecting rod front end hinge shaft 712, and the middle portion of the additional leg bracket transition connecting rod 72 is hinged to the earlobe-shaped extension portion 351 of the basic leg bracket support arm 35, and the additional leg bracket main connecting rods 71 ​​are hinged to the earlobe-shaped extension portion 351 of the basic leg bracket support arm 35. The front end of the leg frame transition link 72 is hinged to the rear end of the additional leg support frame fixed arm traction link 73 through the front end hinge shaft 722 of the additional leg support frame transition link, and the front end of the additional leg support frame fixed arm traction link 73 is hinged to the middle and lower part of the additional leg support frame fixed arm 74 through the front end hinge shaft 731 of the traction link, and the rear end of the additional leg support frame fixed arm 74 is hinged to the front end of the basic leg support support arm 35 through the rear end hinge shaft 742 of the additional leg support frame fixed arm. Therefore, in the process of the aforementioned basic deployment mechanism 3 being deployed, the additional leg support frame main link 71 is driven by the rear end hinged link 32 of the basic leg support frame, and the additional leg support frame transition link 72 and the additional leg support frame fixed arm 74 are driven by the basic leg support frame support arm 35 at the same time. In the aforementioned process, the additional leg support frame fixed arm traction link 73 is also linked, so that the pair of re-extension mechanisms 7 together with the additional leg support frame 8 fixed between the pair of fixed arm cantilever ends 741 are deployed, forming a Figure 1 and Figure 2 The state you are in.

[0034] It can be seen that, compared with the prior art, the present invention ingeniously adds a connecting rod that is easy to fold / unfold and has a small volume, and only one action (the action of the driving mechanism 5) can complete the unfolding of a pair of basic unfolding mechanisms 3 and a pair of re-extension mechanisms 7, without using two sets of driving mechanisms 5. In particular, only one driving mechanism 5 with one motor 51 is required to fully reflect the technical effects recorded by the applicant in the technical effect column above, and can also reflect a good energy-saving effect.

[0035] When the present invention is to be in a non-expanded state, that is, in a non-use state, the passenger operates the aforementioned operating switch in the reverse direction, so that the motor shaft of the motor 51 of the structural system of the driving mechanism 5 rotates in the reverse direction relative to the aforementioned state, and the folding (folding) is completed according to the opposite action process to the aforementioned state. Figure 3 and Figure 4 Status shown.

[0036] In summary, the technical solution provided by the present invention makes up for the deficiencies in the prior art, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. A leg support structure, comprising a support mechanism (1) for fixing to a car seat frame in a use state; a driving beam (2) and a pair of basic deployment mechanisms (3), wherein the pair of basic deployment mechanisms (3) are arranged in a left-right corresponding state to each other and the rear ends are hinged to the support mechanism (1), and the driving beam (2) is pivotally arranged between the rear ends of the pair of basic deployment mechanisms (3) facing each other; a basic leg support (4), wherein the basic leg support (4) is arranged between the pair of basic deployment mechanisms (3); a driving mechanism (5) and a driving beam actuating screw (6), wherein the driving mechanism (5) is fixed to the support mechanism (1), the rear end of the driving beam actuating screw (6) is in transmission cooperation with the driving mechanism (5), and the front end of the driving beam actuating screw (6) is connected to the driving beam (2); characterized in that: It also includes a pair of re-extension mechanisms (7) and an additional leg support frame (8), wherein the pair of re-extension mechanisms (7) are arranged in a state corresponding to each other on the left and right, and the rear ends of the pair of re-extension mechanisms (7) are hinged to the front ends of the pair of basic unfolding mechanisms (3), and the additional leg support frame (8) is arranged between the front ends of the pair of re-extension mechanisms (7).

2. The leg support structure according to claim 1, characterized in that: The support mechanism (1) comprises a left fixing plate (11) of the automobile seat frame, a right fixing plate (12) of the automobile seat frame and a fixing plate connecting support beam (13). The left and right fixing plates (11, 12) of the automobile seat frame correspond to each other on the left and right sides and are fixed to the opposite sides of the automobile seat frame in the use state. The fixing plate connecting support beam (13) is fixed between the opposite sides of the left and right fixing plates (11, 12) of the automobile seat frame. The rear ends of the pair of basic unfolding mechanisms (3) arranged in a state of corresponding to each other on the left and right sides are respectively hinged to the opposite sides of the front ends of the left fixing plate (11) and the right fixing plate (12) of the automobile seat frame. The driving mechanism (5) is fixed to the middle part of the length direction of the fixing plate connecting support beam (13); and the driving beam actuating screw (6) is connected to the middle part of the length direction of the driving beam (2).

3. The leg support structure according to claim 2, characterized in that: The pair of basic unfolding mechanisms (3) each comprises a driving link (31), a basic leg bracket rear end hinged link (32), a basic leg bracket middle hinged link (33), a follower link (34) and a basic leg bracket support arm (35); the rear end of the driving link (31) is hinged to the front upper part of the right fixing plate (12) of the automobile seat frame, the front end of the driving link (31) is hinged to the lower end of the basic leg bracket middle hinged link (33), and the middle part of the driving link (31) is hinged to the right end of the driving beam (2) and the middle part of the basic leg bracket rear end hinged link (32), the upper end of the basic leg bracket rear end hinged link (32) is hinged to the rear end of the basic leg bracket support arm (35), and the lower end of the basic leg bracket rear end hinged link (32) is hinged to the front end of the follower link (34). The middle hinged link (33) of the basic leg bracket is located in front of the rear end hinged link (32) of the basic leg bracket and forms a parallel relationship with the rear end hinged link (32) of the basic leg bracket. The upper end of the middle hinged link (33) of the basic leg bracket is hinged to the basic leg bracket support arm (35). The follower link (34) forms a parallel relationship with the driving link (31) and the rear end of the driving link (34) is hinged to the front lower part of the right fixed plate (12) of the automobile seat frame. The basic leg bracket (4) is arranged between the basic leg bracket support arms (35) of a pair of basic unfolding mechanisms (3). The pair of re-extension mechanisms (7) are respectively hinged to the front end and the middle part of the basic leg bracket support arm (35) and are also hinged to the rear end hinged link (32) of the basic leg bracket when carrying the additional leg bracket (8).

4. The leg support structure according to claim 3, characterized in that: The basic leg bracket (4) comprises a basic leg bracket front support plate (41), a basic leg bracket rear support plate (42) and a support plate connecting plate (43). The basic leg bracket front and rear support plates (41, 42) are parallel to each other and are spaced apart from each other between the upper side of the basic leg bracket support arm (35) fixed to the pair of basic unfolding mechanisms (3). The left and right ends of the basic leg bracket front and rear support plates (41, 42) respectively protrude from the basic leg bracket support arm (35) for fixing the leg support cushion. The support plate connecting plate (43) is fixed to the basic leg bracket front and rear support plates (41, 42) at the same time at the center position corresponding to the length direction of the basic leg bracket front and rear support plates (41, 42).

5. The leg support structure according to claim 3, characterized in that: The pair of re-extension mechanisms (7) each include an additional leg support frame main connecting rod (71), an additional leg support frame transition connecting rod (72), an additional leg support frame fixed arm traction connecting rod (73), an additional leg support frame fixed arm (74) and a main connecting rod support connecting rod (75), the rear end of the additional leg support frame main connecting rod (71) is hinged to the upper end of the rear end hinged connecting rod (32) of the basic leg support frame, and the additional leg support frame main connecting rod (71) The front end of the additional leg support frame transition link (72) is hinged to the rear end of the additional leg support frame transition link (72), the additional leg support frame transition link (72) is located in front of the middle hinged link (33) of the basic leg support frame and forms a parallel relationship with the middle hinged link (33) of the basic leg support frame, the middle part of the additional leg support frame transition link (72) is hinged to the middle part of the basic leg support frame support arm (35), and the front end of the additional leg support frame transition link (72) is hinged to the rear end of the additional leg support frame fixed arm traction link (73), and the front end of the additional leg support frame fixed arm traction link (73) is hinged to the middle part of the additional leg support frame fixed arm (74), and the additional leg support frame The rear end of the additional leg support frame fixing arm (74) is hinged to the front end of the basic leg support frame supporting arm (35), and the front end of the additional leg support frame fixing arm (74) is configured as a fixed arm cantilever end (741), and the additional leg support frame (8) is fixed between the upper parts of the fixed arm cantilever ends (741) of the additional leg support frame fixing arms (74) of a pair of re-extension mechanisms (7), and the left and right ends of the additional leg support frame (8) respectively protrude from the sides of the fixed arm cantilever ends (741) for fixing the leg support cushion, and the main connecting rod supporting the connecting rod (75) is fixed between the opposite sides of the middle parts of a pair of additional leg support frame main connecting rods (71).

6. The leg support structure according to claim 5, characterized in that: An earlobe-shaped extension portion (351) extends downward from the middle of the basic leg support support arm (35) and at a position corresponding to the middle of the additional leg support frame transition link (72); the middle of the additional leg support frame transition link (72) is hinged to the middle of the basic leg support support arm (35) at a position corresponding to the earlobe-shaped extension portion (351).

7. The leg support structure according to claim 2, characterized in that: The left fixing plate (11) and the right fixing plate (12) of the automobile seat frame are fan-shaped, and a left fixing plate fixing bolt hole (111) of the automobile seat frame is respectively provided at the rear end and the middle part of the left fixing plate (11) of the automobile seat frame, and a right fixing plate fixing bolt hole (121) of the automobile seat frame is respectively provided at the rear end and the middle part of the right fixing plate (12) of the automobile seat frame. In a state of use, the left and right fixing plates (11, 12) of the automobile seat frame are respectively fixed to the automobile seat frame by fixing bolts at positions corresponding to the left and right fixing plate fixing bolt holes (111, 121) of the automobile seat frame.

8. The leg support structure according to claim 2, characterized in that: The driving mechanism (5) comprises a motor (51), a worm gear box (52), a worm gear box seat (53) and a worm gear box seat fixing frame (54), wherein the motor (51) is arranged on the right side of the worm gear box (52) in a cantilevered state, a worm formed on the motor shaft of the motor (51) is meshed with a worm wheel located in the worm gear box (52), the worm gear box (52) is arranged in a worm gear box seat accommodating chamber (531) of the worm gear box seat (53), and the worm gear box seat (53) and the worm gear box seat fixing frame are connected to each other. (54) is fixed, and the worm gear box seat fixing frame (54) is fixed to the middle rear side of the length direction of the support beam (13) connected to the fixing plate, the rear end of the driving beam actuating screw (6) is transmission-matched with the worm gear center hole formed on the worm gear, and the front end of the driving beam actuating screw (6) is formed with a screw fixing ear (61), and the screw fixing ear (61) is fixed to the screw fixing ear seat (612) through a screw fixing ear screw (611), and the screw fixing ear seat (612) is fixed to the middle part of the length direction of the driving beam (2).

9. The leg support structure according to claim 8, characterized in that: The motor is a DC motor with forward and reverse rotation functions.

10. A car seat, characterized in that: The invention has the leg support structure as claimed in claim 1.

Images