Leg support structure and automobile seat thereof

Abstract

The utility model 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 utility model belongs to the technical field of automobile seat accessories, and specifically relates to a leg rest structure, and further relates to an automobile seat thereof. BACKGROUND

[0002] As people know, a leg rest aiming to provide a comfortable riding experience is usually equipped on the seat of a relatively high-end luxury vehicle or a medium-high-grade vehicle. The positive significance of configuring a leg rest is at least the following aspects: relieving waist fatigue and tiredness; improving driving safety; improving riding comfort; embodying good individualized support; improving waist support to help reduce lumbar pressure and play a health protection role; improving the interior decoration effect of the vehicle, and the like.

[0003] In the disclosed Chinese and foreign patent documents, there are technical information related to leg rests, such as CN212386376U recommending "a leg rest adjusting structure of an automobile seat", CN210011655U providing "an improved structure of an automobile leg rest", TW201538363A introducing "a quick type foot lifting device for a vehicle", CN117382514B announcing "a leg rest device of an automobile seat", and German patent DE202019103838U1 disclosing "an electric sofa frame", and the like. The common feature of the patents not limited to the above examples is that it can be unfolded and restored, but it cannot be extended again after unfolding. Because it cannot be extended as needed after unfolding, the support length of the lower leg of the rider is limited, which is not sufficient to obtain the desired comfort. For a rider with long legs, the feeling of fatigue in the lower limbs is often particularly prominent.

[0004] CN215436135U discloses "a four-way leg rest mechanism of an automobile seat" having the function of continuing to extend after unfolding, which is composed of a bracket assembly, a multi-link riveting assembly, and an upper cover plate assembly. This patent can objectively realize the technical effects described in paragraph 0022 of its specification, but it uses a leg rest extension lead screw motor and a leg rest rotating lead screw motor in the structure system of the upper cover plate assembly and in the structure system connecting the multi-link riveting assembly and the bracket assembly, that is, two drive mechanisms each provided with a motor are needed to realize opening (unfolding) and re-extension (see paragraph 0029 of the specification for details). Therefore, the overall structure is not simple and the failure probability is doubled compared to a single drive mechanism provided with a motor, which is not conducive to the realization of cheapness and the principle of resource conservation. UTILITY MODEL CONTENTS

[0005] The utility model discloses a leg support structure which can be unfolded and extended again under the premise of using only a single driving mechanism, and the overall structure is simplified, the failure probability is reduced, the cheapness is embodied, the resource saving principle is embodied, and the leg support structure is adapted to the saving and energy-saving economic spirit.

[0006] Another object of the utility model is to provide an automobile seat which can fully embody the technical effects of the leg support structure.

[0007] The utility model discloses a leg support structure, including the support mechanism for being fixed with the automobile seat framework in the use state, a driving beam and a pair of basic unfolding mechanism, a pair of basic unfolding mechanism are set up with each other left -right corresponding state and rear end are hinged with the support mechanism, and the driving beam is pivoted between the rear end of a pair of basic unfolding mechanism and the opposite side, a basic leg support frame is set up between a pair of basic unfolding mechanism, a driving mechanism and a driving beam actuating screw rod, and the driving mechanism is fixed on the support mechanism, and the rear end of the driving beam actuating screw rod is transmission cooperation with the driving mechanism, and the front end of the driving beam actuating screw rod is connected with the driving beam, characterized by further including a pair of extension mechanism and an additional leg support frame, and a pair of extension mechanism are set up with each other left -right corresponding state and the rear end of the pair of extension mechanism is hinged with the front end of the pair of basic unfolding mechanism, and the additional leg support frame is set up between the front end of a pair of extension mechanism.

[0008] In a specific embodiment of the utility model, the support mechanism includes a left fixed plate of automobile seat framework, a right fixed plate of automobile seat framework and a fixed plate connecting support beam, and the left and right fixed plates of automobile seat framework correspond to each other and are fixed with the opposite side of the automobile seat framework in the use state, and the fixed plate connecting support beam is fixed between the opposite side of the left and right fixed plates of automobile seat framework, the rear end of the pair of basic unfolding mechanism set up with each other left -right corresponding state is hinged with the side opposite to the front end of the left fixed plate of automobile seat framework and the right fixed plate of automobile seat framework respectively, the driving mechanism is fixed in the middle of the length direction of the fixed plate connecting support beam, and the driving beam actuating screw rod is connected with the middle of the length direction of the driving beam.

[0009] In another embodiment of the utility model, the pair of basic unfolding mechanisms each comprises a driving link, a basic leg bracket rear end hinged link, a basic leg bracket middle hinged link, a follow-up link and a basic leg bracket supporting arm, the rear end of the driving link is hinged to the upper front part of the right fixed plate of the automobile seat framework, the front end of the driving link is hinged to the lower end of the basic leg bracket middle hinged link, and the middle part of the driving link is hinged to the right end of the driving beam and the middle part of the basic leg bracket rear end hinged link, the upper end of the basic leg bracket rear end hinged link is hinged to the rear end of the basic leg bracket supporting arm, and the lower end of the basic leg bracket rear end hinged link is hinged to the front end of the follow-up link, the basic leg bracket middle hinged link is located in front of the basic leg bracket rear end hinged link and forms a parallel relationship with the basic leg bracket rear end hinged link, the upper end of the basic leg bracket middle hinged link is hinged to the basic leg bracket supporting arm, the follow-up link forms a parallel relationship with the driving link, and the rear end of the driving link is hinged to the lower front part of the right fixed plate of the automobile seat framework.

[0010] In another embodiment of the utility model, the basic leg bracket comprises a basic leg bracket front supporting plate, a basic leg bracket rear supporting plate and a supporting plate connecting plate, the basic leg bracket front and rear supporting plates are parallel to each other and are spaced apart from the side of the basic leg bracket supporting arm of the pair of basic unfolding mechanisms towards the upper side, the left end and the right end of the basic leg bracket front and rear supporting plates each project out of the basic leg bracket supporting arm and are used for fixing leg supporting cushions, and the supporting plate connecting plate is fixed to the basic leg bracket front and rear supporting plates at the central position corresponding to the length direction of the basic leg bracket front and rear supporting plates.

[0011] In still another specific embodiment of the utility model, the pair of re-extension mechanisms each comprises an additional leg support frame main connecting rod, an additional leg support frame transition connecting rod, an additional leg support frame fixed arm traction connecting rod, an additional leg support frame fixed arm and a main connecting rod support connecting rod, the rear end of the additional leg support frame main connecting rod is hingedly connected to the upper end of the rear end hinged connecting rod of the base leg support frame, the front end of the additional leg support frame main connecting rod is hingedly connected to the rear end of the additional leg support frame transition connecting rod, the additional leg support frame transition connecting rod is located in front of the middle part hinged connecting rod of the base leg support frame and forms a parallel relationship with the middle part hinged connecting rod of the base leg support frame, the middle part of the additional leg support frame transition connecting rod is hingedly connected to the middle part of the base leg support frame supporting arm, the front end of the additional leg support frame transition connecting rod is hingedly connected to the rear end of the additional leg support frame fixed arm traction connecting rod, the front end of the additional leg support frame fixed arm traction connecting rod is hingedly connected to the middle part of the additional leg support frame fixed arm, the rear end of the additional leg support frame fixed arm is hingedly connected to the front end of the base leg support frame supporting arm, the front end of the additional leg support frame fixed arm is formed into a fixed arm cantilever end, the additional leg support frame is fixed between the upper parts of the fixed arm cantilever ends of the additional leg support frame fixed arms of the pair of re-extension mechanisms, and the left end and the right end of the additional leg support frame each project from the side of the fixed arm cantilever end and is used for fixing the leg support cushion, and the main connecting rod support connecting rod is fixed between the middle parts of the pair of additional leg support frame main connecting rods.

[0012] In still another specific embodiment of the utility model, the pair of re-extension mechanisms each comprises an additional leg support frame main connecting rod, an additional leg support frame transition connecting rod, an additional leg support frame fixed arm traction connecting rod, an additional leg support frame fixed arm and a main connecting rod support connecting rod, the rear end of the additional leg support frame main connecting rod is hingedly connected to the upper end of the rear end hinged connecting rod of the base leg support frame, the front end of the additional leg support frame main connecting rod is hingedly connected to the rear end of the additional leg support frame transition connecting rod, the additional leg support frame transition connecting rod is located in front of the middle part hinged connecting rod of the base leg support frame and forms a parallel relationship with the middle part hinged connecting rod of the base leg support frame, the middle part of the additional leg support frame transition connecting rod is hingedly connected to the middle part of the base leg support frame supporting arm, the front end of the additional leg support frame transition connecting rod is hingedly connected to the rear end of the additional leg support frame fixed arm traction connecting rod, the front end of the additional leg support frame fixed arm traction connecting rod is hingedly connected to the middle part of the additional leg support frame fixed arm, the rear end of the additional leg support frame fixed arm is hingedly connected to the front end of the base leg support frame supporting arm, the front end of the additional leg support frame fixed arm is formed into a fixed arm cantilever end, the additional leg support frame is fixed between the upper parts of the fixed arm cantilever ends of the additional leg support frame fixed arms of the pair of re-extension mechanisms, and the left end and the right end of the additional leg support frame each project from the side of the fixed arm cantilever end and is used for fixing the leg support cushion, and the main connecting rod support connecting rod is fixed between the middle parts of the pair of additional leg support frame main connecting rods.

[0013] In still another specific embodiment of the utility model, the pair of re-extension mechanisms each comprises an additional leg support frame main connecting rod, an additional leg support frame transition connecting rod, an additional leg support frame fixed arm traction connecting rod, an additional leg support frame fixed arm and a main connecting rod support connecting rod, the rear end of the additional leg support frame main connecting rod is hingedly connected to the upper end of the rear end hinged connecting rod of the base leg support frame, the front end of the additional leg support frame main connecting rod is hingedly connected to the rear end of the additional leg support frame transition connecting rod, the additional leg support frame transition connecting rod is located in front of the middle part hinged connecting rod of the base leg support frame and forms a parallel relationship with the middle part hinged connecting rod of the base leg support frame, the middle part of the additional leg support frame transition connecting rod is hingedly connected to the middle part of the base leg support frame supporting arm, the front end of the additional leg support frame transition connecting rod is hingedly connected to the rear end of the additional leg support frame fixed arm traction connecting rod, the front end of the additional leg support frame fixed arm traction connecting rod is hingedly connected to the middle part of the additional leg support frame fixed arm, the rear end of the additional leg support frame fixed arm is hingedly connected to the front end of the base leg support frame supporting arm, the front end of the additional leg support frame fixed arm is formed into a fixed arm cantilever end, the additional leg support frame is fixed between the upper parts of the fixed arm cantilever ends of the additional leg support frame fixed arms of the pair of re-extension mechanisms, and the left end and the right end of the additional leg support frame each project from the side of the fixed arm cantilever end and is used for fixing the leg support cushion, and the main connecting rod support connecting rod is fixed between the middle parts of the pair of additional leg support frame main connecting rods.

[0014] In a further specific embodiment of the utility model, the driving mechanism includes a motor, a worm gear box, a worm gear box seat and a worm gear box seat fixing frame, the motor is arranged in a cantilever state at the right side of the worm gear box, the worm on the motor shaft of the motor is engaged with the worm wheel in the worm gear box, the worm gear box is arranged in the worm gear box seat accommodating cavity of the worm gear box seat, the worm gear box seat is fixed with the worm gear box seat fixing frame, and the rear side of the middle part of the length direction of the fixing plate connecting support beam is fixed with the worm gear box seat fixing frame, the rear end of the driving beam actuating screw is in transmission cooperation with the worm center hole on the worm, and the front end of the driving beam actuating screw is provided with a screw fixing lug, the screw fixing lug is fixed with the screw fixing lug seat through screw fixing lug screw, and the middle part of the length direction of the driving beam is fixed with the screw fixing lug seat.

[0015] In a further specific embodiment of the utility model, the motor is a direct current motor with forward and reverse rotation functions.

[0016] Another task of the utility model is achieved as follows, a car seat has the leg support structure.

[0017] The technical scheme provided by the utility model only needs to use one driving mechanism, the rear end of the additionally added lengthening mechanism is hinged with the front end of a pair of base unfolding mechanisms, and the additional leg support frame is arranged between the front end of a pair of lengthening mechanisms, so that the driving beam actuating screw is driven under the work of the driving mechanism, the driving beam is driven by the driving beam actuating screw, the pair of base unfolding mechanisms are driven by the driving beam, and the pair of lengthening mechanisms and the additional leg support frame are unfolded by the base unfolding mechanisms, compared with the prior art, the lengthening requirement can be met under the premise of single driving mechanism, the overall structure is significantly simplified and the failure probability is reduced, the economic and inexpensive and resource-saving economic spirit advocated by the whole society at present is embodied, and the car seat can fully embody the technical effect of the leg support structure. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the embodiment structure diagram of the utility model;

[0019] Figure 2 It is Figure 1 It is the schematic view of the right side surface observation;

[0020] Figure 3 It is Figure 1 And Figure 2 It is the three-dimensional structure schematic view of the unfolded use state changing into the folded non-use state shown in the figure;

[0021] Figure 4 It is Figure 3A schematic diagram showing the view from the right side. Detailed Implementation

[0022] In order to better understand the technical essence and beneficial effects of this utility model, the applicant provides a detailed description below by way of embodiments. However, the description of the embodiments is not intended to limit the solution of this utility model. Any formal but not substantive equivalent transformations made based on the concept of this utility model should be considered within the scope of the technical solution of this utility model.

[0023] In the following description, all directional or positional concepts involving up, down, left, right, front, and back are based on the current position. Figure 1 The location and state are taken as a reference, and therefore should not be construed as a special limitation on the technical solution provided by this utility model.

[0024] Please see Figure 1 and Figure 2 The diagram shows a bracket mechanism 1 for fixing to a car seat frame in use. Of course, the bracket mechanism 1 can also be fixed to the seat basin of the car seat; therefore, fixing the bracket mechanism 1 to the car seat frame or to the seat basin should be considered an equivalent fixing method. It also shows a drive beam 2 and a pair of base deployment mechanisms 3, arranged in a left-right symmetrical configuration with their rear ends hinged to the aforementioned bracket mechanism 1. The drive beam 2 is pivotally positioned between the rear ends of the pair of base deployment mechanisms 3 on opposite sides. Since the drive beam 2 is a hollow tubular structure, it can be called a tubular beam. A base leg bracket 4 is shown, positioned between the pair of base deployment mechanisms 3. Finally, 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 engaged with the drive mechanism 5, and the front end of the drive beam actuating screw 6 is connected to the aforementioned drive beam 2.

[0025] The key technical points of the technical solution provided by this utility model are as follows: the provided leg support structure also includes a pair of re-extension mechanisms 7 and an additional leg support frame 8. The pair of re-extension mechanisms 7 are arranged in a state of mutual left and right correspondence, and the rear end of the pair of re-extension mechanisms 7 is hinged to the front end of the aforementioned pair of basic unfolding mechanisms 3. The additional leg support frame 8 is arranged between the front ends of the pair of re-extension mechanisms 7.

[0026] The aforementioned support mechanism 1 includes a left fixing plate 11 of a car seat frame, a right fixing plate 12 of a car seat frame, and a fixing plate connecting support beam 13. The left and right fixing plates 11 and 12 of the car seat frame are symmetrical to each other and are fixed to the opposite side of the car seat frame or seat basin 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 and 12 of the car seat frame. The rear ends of the pair of basic unfolding mechanisms 3, which are arranged in a symmetrical state, are respectively hinged to the opposite (back-to-back) sides of the front ends of the aforementioned left fixing plate 11 and right fixing plate 12 of the car seat frame. The aforementioned drive mechanism 5 is fixed in the middle of the length direction of the aforementioned fixing plate connecting support beam 13. The aforementioned drive beam actuating screw 6 is connected to the middle of the length direction of the aforementioned drive beam 2.

[0027] Since the pair of basic deployment mechanisms 3 includes one basic deployment mechanism on the left and one on the right, and both have the same structure, the applicant's description below refers to the basic deployment mechanism on the right. It includes a drive link 31, a rear hinge link 32 of the basic leg bracket, a middle hinge 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 drive link 31 is hinged to the upper front of the aforementioned right fixing plate 12 of the car seat frame via a rear hinge shaft 311, and the front end of the drive link 31 is hinged to the lower end of the middle hinge link 33 of the basic leg bracket via a front hinge shaft 312. The middle part of the drive link 31 is pivotally engaged with the right end of the aforementioned drive beam 2 and is hinged to the middle part of the rear hinge link 32 of the base leg bracket via the middle hinge shaft 313 of the drive link. The upper end of the rear hinge link 32 of the base leg bracket is hinged to the rear end of the base leg bracket support arm 35 via the upper hinge shaft 321 of the rear hinge link of the base leg bracket. The lower end of the rear hinge link 32 of the base leg bracket is connected to the lower end of the rear hinge link of the base leg bracket. The hinge shaft 322 is hinged to the front end of the follower link 34. The middle hinge link 33 of the base leg bracket is located in front of the rear hinge link 32 of the base leg bracket and is parallel to the rear hinge link 32 of the base leg bracket. The upper end of the middle hinge link 33 of the base leg bracket is hinged to the support arm 35 of the base leg bracket through the upper hinge shaft 331 of the middle hinge link of the base leg bracket. The follower link 34 is parallel to the drive link 31 and the rear end of the drive link 34 is hinged to the lower front of the right fixing plate 12 of the aforementioned car seat frame through the rear hinge shaft 341 of the follower link. The aforementioned base leg bracket 4 is arranged between the base leg bracket support arms 35 of a pair of base unfolding mechanisms 3. The aforementioned pair of re-extension mechanisms 7, when carrying the aforementioned additional leg bracket 8, are each hinged to the front end and middle of the aforementioned base leg bracket support arm 35 and are also hinged to the rear hinge link 32 of the aforementioned base leg bracket.

[0028] The aforementioned base leg bracket 4 includes a base leg bracket front support plate 41, a base leg bracket rear support plate 42, and a support plate connecting plate 43. The base leg bracket front and rear support plates 41 and 42 are parallel to each other and spaced apart from each other, and preferably are welded to the upward-facing side of the aforementioned base leg bracket support arm 35 fixed to the aforementioned pair of base unfolding mechanisms 3. The left and right ends of the base leg bracket front and rear support plates 41 and 42 protrude from the base leg bracket support arm 35 for fixing the leg support pad (outer covering pad). The support plate connecting plate 43 is preferably welded to the base leg bracket front and rear support plates 41 and 42 at the center position corresponding to the length direction of the base leg bracket front and rear support plates 41 and 42.

[0029] Since the pair of re-extension mechanisms 7 includes one re-extension mechanism on the left and one on the right, and each has the same structure, the applicant's description below refers to the re-extension mechanism on the right.

[0030] See you later Figure 1 and Figure 2 Each of the aforementioned pair of extension mechanisms 7 includes an additional support frame main connecting rod 71, an additional support frame transition connecting rod 72, an additional support frame fixing arm traction connecting rod 73, an additional support frame fixing arm 74, and a main connecting rod support connecting rod 75. The rear end of the additional support frame main connecting rod 71 is hinged to the upper end of the aforementioned base leg bracket rear end hinge connecting rod 32 via an additional support frame main connecting rod rear end hinge shaft 711. The front end of the additional support frame is hinged to the rear end of the additional support frame transition link 72 via the front hinge shaft 712 of the main connecting rod of the additional support frame. The additional support frame transition link 72 is located in front of the aforementioned middle hinge link 33 of the base leg bracket and is parallel to the middle hinge link 33 of the base leg bracket. The middle part of the additional support frame transition link 72 is hinged to the middle part of the aforementioned base leg bracket support arm 35 via the middle hinge shaft 721 of the support frame transition link. The front end of the additional support frame transition link 72 is hinged to the rear end of the additional support frame fixed arm traction link 73 via the front hinge shaft 722 of the additional support frame transition link. The front end of the additional support frame fixed arm traction link 73 is hinged to the front end of the traction link. The shaft 731 is hinged to the middle of the additional support bracket fixing arm 74. The rear end of the additional support bracket fixing arm 74 is hinged to the front end of the base leg bracket support arm 35 through the rear end hinge shaft 742 of the additional support bracket fixing arm. The front end of the additional support bracket fixing arm 74 is configured as the fixed arm cantilever end 741. The aforementioned additional support bracket 8 is preferably fixed by welding between the upper parts of the aforementioned fixed arm cantilever end 741 of the additional support bracket fixing arm 74 of the pair of extension mechanisms 7. The left and right ends of the additional support bracket 8 protrude from the side of the fixed arm cantilever end for fixing the support leg pad (outer covering pad). The main connecting rod support connecting rod 75 is fixed between the middle of the pair of additional support bracket main connecting rods 71 ​​facing each other.

[0031] Depend on Figure 1 and Figure 2 As shown, an earlobe-shaped extension 351 extends downward from the middle of the aforementioned basic leg bracket support arm 35 and at the position corresponding to the middle of the additional leg bracket transition link 72. The middle of the aforementioned additional leg bracket transition link 72 is hinged to the middle of the basic leg bracket support arm 35 at the position corresponding to the earlobe-shaped extension 351 via the aforementioned leg bracket transition link middle hinge shaft 721.

[0032] The aforementioned left fixing plate 11 and right fixing plate 12 of the car seat frame are fan-shaped. A left fixing plate fixing bolt hole 111 is provided at the rear end and the middle of the left fixing plate 11, and a right fixing plate fixing bolt hole 121 is provided at the rear end and the middle of the right fixing plate 12. In use, the left and right fixing plates 11 and 12 of the car seat frame are fixed to the car seat frame by fixing bolts at the positions corresponding to the left and right fixing plate fixing bolt holes 111 and 121, respectively.

[0033] Please see Figure 1 The aforementioned drive mechanism 5 includes a motor 51, a worm gear box 52, a worm gear box holder 53, and a worm gear box holder fixing frame 54. The motor 51 is cantilevered and mounted on the right side of the worm gear box 52. The worm (not shown in the figure) on the motor shaft of the motor 51 meshes with the worm wheel (not shown in the figure) located in the worm gear box 52. The worm gear box 52 is disposed in the worm gear box holder receiving cavity 531 of the worm gear box holder 53. The worm gear box holder 53 and the worm wheel... The rod holder mounting bracket 54 is fixed, and the worm gear holder mounting bracket 54 is fixed to the rear side of the middle of the length direction of the connecting support beam 13 of the aforementioned fixed plate. The rear end of the aforementioned drive beam actuating screw 6 is engaged with the worm wheel center hole formed on the worm wheel, and the front end of the drive beam actuating screw 6 is provided with a screw fixing lug 61. The screw fixing lug 61 is fixed to the screw fixing lug seat 612 by a screw fixing lug screw 611. The screw fixing lug seat 612 is fixed to the middle of the length direction of the aforementioned drive beam 2. Since the structure and working mechanism of the aforementioned drive mechanism 5 are existing technologies, for example, see CN111660901A (a leg support drive device for an automobile seat), the applicant has only provided a brief description.

[0034] In this embodiment, the aforementioned motor is a DC motor with forward and reverse rotation functions, and the motor is electrically connected to the vehicle power supply.

[0035] Please see Figure 3 and Figure 4 And combined Figure 1 and Figure 2The user operates the control switch located on the side of the seat, for example, when the structure of this utility model is to be in a certain position... Figure 1 and Figure 2 When in the unfolded state, the aforementioned operation switch is activated, causing the motor 51 of the drive mechanism 5 to operate. The worm gear thread on the motor shaft drives the worm gear in the worm gear box 52 to move. The movement of the worm gear drives the drive beam actuating screw 6, which has a worm gear shaft effect, to rotate clockwise. Since the front end of the drive beam actuating screw 6 is fixed to the screw fixing lug 61 by means of the screw fixing lug screw 611 and the screw fixing lug seat 612, and since the screw fixing lug seat 612 is welded to the middle of the aforementioned drive beam 2 in the length direction, the drive beam actuating screw 6 drives the drive beam 2 to rotate. The drive beam 2 drives the drive connecting rod 31. Under the action of the drive connecting rod 31, the upper end of the rear hinge connecting rod 32 of the base leg bracket tilts forward, while the lower end of the rear hinge connecting rod 32 of the base leg bracket drives the follower connecting rod 34 and causes the follower connecting rod 34 to move backward. During the forward tilting or displacement of the aforementioned rear hinged link 32 of the foundation leg bracket, since the upper end of the rear hinged link 32 is hinged to the rear end of the foundation leg bracket support arm 35 via the upper hinge shaft 321, it causes the foundation leg bracket support arm 35 to move forward. During this forward displacement, since the aforementioned middle hinged link 33 is hinged to the foundation leg bracket support arm 35 via the upper hinge shaft 331, the foundation leg bracket support arm 35 causes the upper end of the middle hinged link 33 to also tilt forward, thus causing the foundation leg bracket support arm 35, along with the aforementioned foundation leg bracket 4, to unfold. Figure 1 and Figure 2 As shown, the front side of the right fixing plate 12 of the car seat frame, the rear end of the drive link 31, the follower link 34, and the lower end of the rear hinge link 32 of the base leg bracket together form a parallelogram relationship. Furthermore, the front end of the drive link 31, the upper end of the rear hinge link 32 of the base leg bracket, the rear end of the support arm 35 of the base leg bracket, and the middle hinge link 33 of the base leg bracket together form another parallelogram relationship, thus enabling them to move together.

[0036] As a key technical feature of this invention, the additional pair of re-extension mechanisms 7 are arranged in a left-right correspondence, with their rear ends hinged to the front ends of the base leg bracket support arms 35 of the structural system of the pair of base deployment mechanisms 3, and to the upper ends of the aforementioned rear end hinged connecting rods 32 of the base leg bracket. Specifically, the rear end of the additional support frame main connecting rod 71 of the structural system of the pair of re-extension mechanisms 7 is hinged to the upper end of the rear end hinged connecting rod 32 of the base leg bracket via the rear end hinge shaft 711 of the additional support frame main connecting rod, while the front end is hinged to the rear end of the additional support frame transition connecting rod 72 via the front end hinge shaft 712 of the additional support frame main connecting rod, and the middle part of the additional support frame transition connecting rod 72 is hinged to the earlobe-shaped extension 351 of the base 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 frame fixed arm traction link 73 via the front hinge shaft 722 of the additional leg frame transition link. The front end of the additional leg frame fixed arm traction link 73 is hinged to the lower middle part of the additional leg frame fixed arm 74 via the front hinge shaft 731 of the traction link. The rear end of the additional leg frame fixed arm 74 is hinged to the front end of the base leg bracket support arm 35 via the rear hinge shaft 742 of the additional leg frame fixed arm. Therefore, during the deployment of the aforementioned basic deployment mechanism 3, the rear hinged connecting rod 32 of the basic leg bracket drives the main connecting rod 71 of the additional leg bracket, and the support arm 35 of the basic leg bracket simultaneously drives the transition connecting rod 72 and the fixing arm 74 of the additional leg bracket. During the aforementioned process, the traction connecting rod 73 of the fixing arm of the additional leg bracket is also linked, causing the pair of re-extension mechanisms 7 together with the additional leg bracket 8 fixed between the cantilever ends 741 of the pair of fixing arms to deploy, forming... Figure 1 and Figure 2 The current state.

[0037] Therefore, compared with existing technologies, this utility model ingeniously adds a connecting rod that is easy to fold / unfold and has a small size. With just one action (the action of the drive mechanism 5), the unfolding of a pair of basic unfolding mechanisms 3 and a pair of re-extension mechanisms 7 can be completed, without the need for two sets of drive mechanisms 5. In particular, the fact that only one drive mechanism 5 with one motor 51 is required fully demonstrates the technical effects described by the applicant in the above technical effect column, and also demonstrates good energy-saving effect.

[0038] When this utility model is to be in a non-expanded or unused state, the passenger reverses the operation switch, causing the motor shaft of the motor 51 in the drive mechanism 5 to rotate in the opposite direction, completing the folding process and presenting a shape... Figure 3 and Figure 4 The state shown.

[0039] In summary, the technical solution provided by this utility model makes up for the shortcomings of 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, in use, a support mechanism (1) for fixing to a car seat frame; a drive beam (2) and a pair of base deployment mechanisms (3), the pair of base deployment mechanisms (3) being arranged in a left-right corresponding state and having their rear ends hinged to the support mechanism (1), the drive beam (2) being pivotally positioned between the rear ends of the pair of base deployment mechanisms (3) facing each other; a base leg support (4) disposed between the pair of base deployment mechanisms (3); a drive mechanism (5) and a drive beam actuating screw (6), the drive mechanism (5) being fixed to the support mechanism (1), the rear end of the drive beam actuating screw (6) being drivenly engaged with the drive mechanism (5), and the front end of the drive beam actuating screw (6) being connected to the drive beam (2); characterized in that: It also includes a pair of re-extension mechanisms (7) and an additional support bracket (8). The pair of re-extension mechanisms (7) are arranged in a left-right correspondence with each other and the rear end of the pair of re-extension mechanisms (7) is hinged to the front end of the pair of basic deployment mechanisms (3). The additional support bracket (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 bracket mechanism (1) includes a left fixing plate (11) of a car seat frame, a right fixing plate (12) of a car seat frame, and a fixing plate connecting support beam (13). The left and right fixing plates (11, 12) of the car seat frame are corresponding to each other and are fixed to the opposite side of the car 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 car seat frame. The rear ends of the pair of basic unfolding mechanisms (3) arranged in a corresponding left and right state 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 car seat frame. The drive mechanism (5) is fixed in the middle of the length direction of the fixing plate connecting support beam (13). The drive beam actuation screw (6) is connected to the middle of the length direction of the drive beam (2).

3. The leg support structure according to claim 2, characterized in that: Each of the two base deployment mechanisms (3) includes a drive link (31), a rear end hinge link (32) of the base leg bracket, a middle hinge link (33) of the base leg bracket, a follower link (34), and a base leg bracket support arm (35). The rear end of the drive link (31) is hinged to the upper front part of the right fixing plate (12) of the car seat frame, and the front end of the drive link (31) is hinged to the lower end of the middle hinge link (33) of the base leg bracket. The middle part of the drive link (31) is hinged to the right end of the drive beam (2) and the middle part of the rear end hinge link (32) of the base leg bracket. The upper end of the rear end hinge link (32) of the base leg bracket is hinged to the rear end of the base leg bracket support arm (35), and the lower end of the rear end hinge link (32) of the base leg bracket is hinged to the front end of the follower link (34). The middle hinge link (33) of the base leg bracket is located in front of the rear hinge link (32) of the base leg bracket and is parallel to the rear hinge link (32) of the base leg bracket. The upper end of the middle hinge link (33) of the base leg bracket is hinged to the support arm (35) of the base leg bracket. The follower link (34) is parallel to the drive link (31) and the rear end of the drive link (34) is hinged to the lower front part of the right fixing plate (12) of the car seat frame. The base leg bracket (4) is arranged between the base leg bracket support arms (35) of a pair of base unfolding mechanisms (3). The pair of re-extension mechanisms (7) are each hinged to the front end and middle part of the support arm (35) of the base leg bracket when the additional leg bracket (8) is mounted, and are also hinged to the rear hinge link (32) of the base leg bracket.

4. The leg support structure according to claim 3, characterized in that: The base leg bracket (4) includes a base leg bracket front support plate (41), a base leg bracket rear support plate (42), and a support plate connecting plate (43). The base leg bracket front and rear support plates (41, 42) are parallel to each other and spaced apart from each other between the base leg bracket support arms (35) fixed to the pair of base unfolding mechanisms (3) on the upward-facing side. The left and right ends of the base leg bracket front and rear support plates (41, 42) protrude from the base leg bracket support arms (35) for fixing the leg support pads. The support plate connecting plate (43) is fixed to the base leg bracket front and rear support plates (41, 42) at the center position corresponding to the length direction of the base leg bracket front and rear support plates (41, 42).

5. The leg support structure according to claim 3, characterized in that: Each of the pair of extension mechanisms (7) includes an additional support leg main link (71), an additional support leg transition link (72), an additional support leg fixing arm traction link (73), an additional support leg fixing arm (74), and a main link support connecting rod (75). The rear end of the additional support leg main link (71) is hinged to the upper end of the rear end hinge link (32) of the base leg bracket. The front end of the additional leg support transition link (72) is hinged to the rear end of the additional leg support transition link (72). The additional leg support transition link (72) is located in front of the middle hinge link (33) of the base leg support and is parallel to the middle hinge link (33) of the base leg support. The middle part of the additional leg support transition link (72) is hinged to the middle part of the support arm (35) of the base leg support. 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), while the front end of the additional leg support fixed arm traction link (73) is hinged to the middle part of the additional leg support fixed arm (74). The rear end of the additional leg bracket fixing arm (74) is hinged to the front end of the base leg bracket support arm (35). The front end of the additional leg bracket fixing arm (74) is configured as a fixed arm cantilever end (741). The additional leg bracket (8) is fixed between the upper part of the fixed arm cantilever end (741) of the additional leg bracket fixing arm (74) of the pair of extension mechanisms (7). The left and right ends of the additional leg bracket (8) protrude from the side of the fixed arm cantilever end (741) for fixing the leg pad. The main connecting rod support connecting rod (75) is fixed between the middle of the pair of additional leg bracket main connecting rods (71) facing each other.

6. The leg support structure according to claim 5, characterized in that: An earlobe-shaped extension (351) extends downward from the middle of the base leg bracket support arm (35) and at a position corresponding to the middle of the additional leg bracket transition link (72). The middle of the additional leg bracket transition link (72) is hinged to the middle of the base leg bracket support arm (35) at a position corresponding to the earlobe-shaped extension (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 car seat frame are fan-shaped. A fixing bolt hole (111) is provided at the rear end and the middle of the left fixing plate (11), and a fixing bolt hole (121) is provided at the rear end and the middle of the right fixing plate (12). In use, the left and right fixing plates (11 and 12) of the car seat frame are fixed to the car seat frame by fixing bolts at the positions corresponding to the fixing bolt holes (111 and 121) of the left and right fixing plates of the car seat frame, respectively.

8. The leg support structure according to claim 2, characterized in that: The drive mechanism (5) includes a motor (51), a worm gear box (52), a worm gear box holder (53), and a worm gear box holder fixing frame (54). The motor (51) is cantilevered and mounted on the right side of the worm gear box (52). The worm on the motor shaft of the motor (51) meshes with the worm wheel located in the worm gear box (52). The worm gear box (52) is mounted in the worm gear box holder cavity (531) of the worm gear box holder (53). The worm gear box holder (53) and the worm gear box holder fixing frame are connected. (54) is fixed, and the worm gear box holder fixing bracket (54) is fixed to the rear side of the middle of the support beam (13) in the length direction of the fixing plate. The rear end of the drive beam actuating screw (6) is engaged with the worm wheel center hole formed on the worm wheel. The front end of the drive beam actuating screw (6) is formed with a screw fixing lug (61). The screw fixing lug (61) is fixed to the screw fixing lug seat (612) by the screw fixing lug screw (611). The screw fixing lug seat (612) is fixed to the middle of the drive beam (2) in the length direction.

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: It has the leg support structure as described in claim 1.

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