Automobile seat with telescopic leg support

Abstract

The invention relates to the technical field of automobile seats, and discloses an automobile seat with a telescopic leg support, which comprises a seat part and a backrest movably arranged on the seat part; the leg support is arranged below the seat part and mounted on the seat part or the vehicle body; the leg support comprises a first bearing module and a second bearing module, and the second bearing module is movably arranged on the first bearing module; a rack is arranged on the first bearing module, a gear is arranged on the seat part or the vehicle body, the rack is meshed with the gear, and the first bearing module can be driven to stretch and retract back and forth by driving the gear to rotate; a lead screw motor is arranged on the first bearing module; the second bearing module is provided with a nut structure, and a lead screw of the lead screw motor is arranged in the nut structure in a penetrating mode to form a lead screw nut mechanism. The lead screw motor can drive the second bearing module to do front-back telescopic motion relative to the first bearing module. The leg support has the advantages that the leg support needs to occupy a small space during installation, the attractiveness is high, and the application range is wider.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, in particular to an automobile seat with a retractable leg support. Background Art

[0002] In order to improve the comfort of passengers, some car seats are equipped with a retractable leg rest at the front to support the passenger's calves. When the leg rest is not needed, it can be folded to the front of the seat; when it is needed, it can be unfolded from the front of the seat.

[0003] At present, there are many types of car seats with leg rest mechanisms, such as four-way adjustable and six-way adjustable leg rests. Most of them adopt six-link mechanism transmission. Since the modeling surface of the car seats of each project is different, the frame may be different, resulting in different six-link mechanism of the leg rest of each project. In addition, in the existing car seats, since the leg rest needs to occupy the installation space at the front end of the seat, the leg rest mechanism cannot be arranged for the car seats with a lower base. Generally, in addition to the leg rest support surface, two plastic parts need to be added to the side of the leg rest mechanism, which is not only complicated in structure, but also poor in appearance. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a car seat with a retractable leg rest which occupies a small installation space, has a high aesthetics and a wide range of applications.

[0005] The technical solution adopted by the present invention to solve the technical problem is to provide a car seat with a retractable leg rest, comprising: A seat and a backrest, wherein the backrest is movably arranged on the seat; A leg rest is arranged below the seat and mounted on the seat or the vehicle body; the leg rest comprises a first supporting module and a second supporting module, the second supporting module being movably arranged on the first supporting module; The first supporting module is provided with a rack, the seat or the body is provided with a gear, the rack is meshed with the gear, and the first supporting module can be driven to move forward and backward by driving the gear to rotate; the first supporting module is provided with a screw motor; The second supporting module is provided with a nut structure, and the screw of the screw motor is inserted into the nut structure to form a screw-nut mechanism; the screw motor can drive the second supporting module to telescope forward and backward relative to the first supporting module.

[0006] Further, the gear is rotatably mounted on the seat or the vehicle body via a rotating shaft; The rotating shaft is provided with a guide slide block, the first supporting module is provided with a slide groove, the guide slide block is located in the guide slide groove, and the guide slide block cooperates with the slide groove to guide the forward and backward telescopic movement of the first supporting module.

[0007] Furthermore, a guide slider is provided on both sides of the gear along the rotating shaft, the first supporting module has a first supporting frame, and the rack is arranged in the middle of the first supporting frame; A slide groove is respectively arranged on both sides of the first supporting frame, one guide sliding block is located in one slide groove, and the other guide sliding block is located in the other slide groove.

[0008] Furthermore, the slide groove is arranged in an arc-shaped groove, and the first supporting frame is arranged in an arc shape.

[0009] Furthermore, a driving motor is disposed on the seat or the body, and an output shaft of the driving motor is connected to or integrally configured with the rotating shaft; The driving motor can drive the first supporting module to telescope forward and backward by driving the gear to rotate.

[0010] Furthermore, the first supporting module is provided with a guide rod, the second supporting module is provided with a guide groove, and the guide rod is inserted into the guide groove; When the screw motor drives the second supporting module to telescope forward and backward relative to the first supporting module, the second supporting module slides along the guide rod.

[0011] Furthermore, the second supporting module has a second supporting frame, and the nut structure and the guide groove are both arranged on the second supporting frame.

[0012] Furthermore, the guide rod is arranged in an arc-shaped rod; the first supporting module is provided with two guide rods, the second supporting module is provided with two guide grooves, and the two guide rods are respectively inserted into the two guide grooves; The lead screw of the lead screw motor is located between the two guide rods.

[0013] Furthermore, a button is provided on the rotating shaft along one side of the gear, and a return spring is provided on the other side of the gear; By pressing the button, the gear and the rack can be disengaged, so that the first supporting module can be telescopically adjusted forward and backward; when the telescopic adjustment is completed, the reset spring can drive the gear to reset, and the gear resumes engagement with the rack, thereby limiting the first supporting module.

[0014] Furthermore, the leg rest can be folded under the seat, the first supporting module can be extended outwards to perform primary adjustment of the leg rest, and the second supporting module can be extended outwards to perform secondary adjustment of the leg rest; The extension stroke of the first-level adjustment of the leg rest is greater than or equal to 172 mm, the extension stroke of the second-level adjustment of the leg rest is greater than or equal to 98 mm, and the total height of the leg rest when folded is less than or equal to 163 mm.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the present invention, the leg rest is arranged below the seat, and can be installed on the seat or on the vehicle body. When installed on the vehicle body, the weight of the main body of the car seat can be reduced. In addition, the leg rest includes a first supporting module and a second supporting module. When the second supporting module is folded on the first supporting module and the first supporting module is folded below the seat, the leg rest is compact, occupies a small space, and has a high overall aesthetics, and there is no need to add other plastic parts to the seat for shielding. When the leg rest is needed, only the first supporting module can be extended forward from the bottom of the seat (first-level adjustment), and the second supporting module can be further extended forward from the first supporting module (second-level adjustment), so as to ensure a long retractable distance and cover the needs of passengers of different body shapes. The leg rest requires little space when adjusted in four directions, and can be applied to car seats with a low seat height, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the automobile seat leg support of the present invention when it is in the designed position; Figure 2 for Figure 1 Side view of Figure 3 for Figure 1 Schematic diagram of the structure of the mid-leg support after secondary adjustment (fully extended); Figure 4 for Figure 3 Side view of Figure 5 for Figure 1 Assembly diagram of the middle leg support and the drive motor; Figure 6 for Figure 3 Assembly diagram of the middle leg support and the drive motor; Figure 7 for Figure 6 Side view of Figure 8 Side view after the leg rest has been adjusted to only one level; Fig. 9 for Figure 5 A schematic diagram of the structure without the first supporting module body and the second supporting module body; Fig.10 for Figure 6 A schematic diagram of the structure without the first supporting module body and the second supporting module body; Fig.11 for Fig. 9 A schematic diagram of the structure of another implementation scheme.

[0017] In the figure: 1. Seat; 2. Backrest; 3. Leg support; 31. First supporting module; 310. First supporting frame; 310A. Rack; 310B. Guide rod; 310C. Slide; 311. Screw motor; 311A. Screw; 32. Second supporting module; 320. Second supporting frame; 320A. Nut structure; 320B. Guide groove; 4. driving motor; 40. rotating shaft; 401. guide slider; 41. gear; 5. Button. DETAILED DESCRIPTION

[0018] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] like Figure 1-Figure 5 and Fig. 9 As shown, a car seat with a retractable leg rest mainly comprises: a seat 1, a backrest 2 and a leg rest. The backrest 2 is movably arranged on the seat 1.

[0024] The leg rest 3 is arranged below the seat 1 and mounted on the seat 1 or on the vehicle body. The entire leg rest module of this embodiment is arranged below the seat 1, and a receiving groove can be arranged at the lower part of the seat 1 to place the leg rest in the receiving groove. The leg rest can be mounted on the seat 1 or on the vehicle body. When mounted on the vehicle body, the weight of the main part of the car seat can be effectively reduced.

[0025] The leg rest of this embodiment includes a first supporting module 31 and a second supporting module 32. The second supporting module 32 is movably arranged on the first supporting module 31 and can be telescopically moved forward and backward on the first supporting module 31. The first supporting module 31 and the second supporting module 32 form a leg rest structure, and the two can be relatively far apart to increase the support range of the leg rest to suit passengers of different body shapes.

[0026] A rack 310A is arranged on the first supporting module 31, and a gear 41 is arranged on the seat 1 or the body. The rack 310A meshes with the gear 41, and by driving the gear 41 to rotate, the first supporting module 31 can be driven to telescope forward and backward; a screw motor 311 is arranged on the first supporting module 31. A nut structure 320A is arranged on the second supporting module 32, and the screw 311A ​​of the screw motor 311 is inserted into the nut structure 320A to form a screw nut mechanism; the screw motor 311 can drive the second supporting module 32 to telescope forward and backward relative to the first supporting module 31. In actual use, the first supporting module 31 can be extended outward to perform the first-level adjustment of the leg rest, that is, the leg rest can be adjusted in two directions, and the second supporting module 32 can be extended outward to perform the second-level adjustment of the leg rest, that is, the leg rest can be adjusted in four directions. The leg rest can be folded to the bottom of the seat 1, and when the leg rest is not needed, it has a high aesthetic appearance after being folded.

[0027] like Figure 5-Figure 10As shown, the gear 41 is rotatably mounted on the seat 1 or the vehicle body through a rotating shaft 40. A guide slider 401 is provided on the rotating shaft 40, and a slide groove 310C is provided on the first supporting module 31. The guide slider 401 is in the slide groove 310C. The guide slider 401 cooperates with the slide groove 310C to guide the forward and backward telescopic movement of the first supporting module 31. Among them, the first supporting module 31 mainly includes an outer main body and a first supporting frame 310. The main body can be directly used to support the legs of the passenger. The first supporting frame 310 ensures the overall supporting strength. The first supporting frame 310 can be made of metal or plastic. Among them, the rack 310A is arranged on the first supporting frame 310. A guide slider 401 is provided on both sides of the gear 41 along the rotating shaft 40, and the rack 310A is arranged in the middle of the first supporting frame 310. A slide groove 310C is provided on each side of the first supporting frame 310, one guide slider 401 is in one slide groove 310C, and the other guide slider 401 is in the other slide groove 310C. The two guide sliders 401 cooperate with the slide grooves 310C on both sides of the first supporting frame 310 to ensure the stability of the first supporting module 31 during telescopic movement.

[0028] The slide groove 310C is arranged in an arc-shaped groove, the first supporting frame 310 is arranged in an arc-shaped shape, and the rack 310A is also arranged in an arc-shaped shape following the shape of the first supporting frame 310. The first supporting module 31 can perform forward and backward telescopic movement along the arc-shaped track.

[0029] Preferably, as an electric telescopic solution, a driving motor 4 is disposed on the seat 1 or the body, and the output shaft of the driving motor 4 is connected to or configured as one body with the rotating shaft 40. The driving motor 4 drives the first supporting module 31 to telescope forward and backward by driving the gear 41 to rotate. In actual use, the driving motor 4 drives the rotating shaft 40 to rotate, and the first supporting module 31 telescopes forward and backward through the engagement of the gear 41 with the rack 310A.

[0030] As another optional solution, a manual expansion solution can also be implemented, such as Fig.11As shown, a button 5 is provided on the rotating shaft 40 along one side of the gear 41, and a return spring (not shown in the figure) is provided on the other side of the gear 41. By pressing the button 5, the gear 41 can be disengaged from the rack 310A, so that the first supporting module 31 can be telescopically adjusted forward and backward. When the telescopic adjustment is completed, the return spring can drive the gear 41 to reset, and the gear 41 resumes the engagement with the rack 310A, and the first supporting module 31 is limited. That is, in this scheme, the first supporting module 31 can be limited by the engagement of the gear 41 and the gear 41, and the position of the leg support 3 is ensured to stay reliably after the telescopic adjustment. In actual use, under the action of the return spring, the gear 41 and the rack 310A are in a meshing state, and the first supporting module 31 cannot be telescopically adjusted. When adjustment is required, the button 5 is pressed to disengage the gear 41 from the rack 310A, and the first supporting module 31 can be telescopically adjusted. After the adjustment is completed, the return spring allows the gear 41 to resume the engagement with the rack 310A.

[0031] Whether to adopt electric adjustment solution or manual adjustment solution can be selected according to the actual needs of customers.

[0032] Specifically, a guide rod 310B is arranged on the first supporting frame 310 of the first supporting module 31, and a guide groove 320B is arranged on the second supporting frame 320 of the second supporting module 32, and the guide rod 310B is inserted into the guide groove 320B. When the screw motor 311 drives the second supporting module 32 to telescope forward and backward relative to the first supporting module 31, the second supporting module 32 slides along the guide rod 310B. Among them, the nut structure 320A and the guide groove 320B are both arranged on the second supporting frame 320. Further, the guide rod 310B is arranged in an arc-shaped rod; two guide rods 310B are arranged on the first supporting module 31, and two guide grooves 320B are arranged on the second supporting module 32, and the two guide rods 310B are respectively inserted into the two guide grooves 320B; the screw 311A ​​of the screw motor 311 is located between the two guide rods 310B. This ensures that the second supporting module 32 has structural stability when it telescopes forward and backward and does not easily get stuck.

[0033] In actual use, the leg rest 3 of this embodiment is arranged below the seat 1, and can be installed on the seat 1 or on the vehicle body. When installed on the vehicle body, the weight of the main body of the car seat can be reduced. In addition, the leg rest 3 includes a first supporting module 31 and a second supporting module 32. When the second supporting module 32 is folded on the first supporting module 31, and the first supporting module 31 is folded below the seat 1, the leg rest 3 is small in size, occupies a small space, and has a high overall aesthetics, and there is no need to add other plastic parts to the seat 1 for shielding. When the leg rest 3 is needed, only the first supporting module 31 can be extended forward from the bottom of the seat 1 (first-level adjustment), and the second supporting module 32 can be further extended forward from the first supporting module 31 (second-level adjustment), ensuring a long retractable distance and covering the needs of passengers of different body shapes. The leg rest 3 requires a small space when adjusted in four directions, and can be applied to car seats with a low height of the seat 1, and has a wide range of applications.

[0034] Among them, when the extension stroke of the first-level adjustment of the leg rest 3 is greater than or equal to 172 mm, that is, the two-way stroke of the leg rest 3 is greater than or equal to 172 mm; the extension stroke of the second-level adjustment of the leg rest 3 is greater than or equal to 98 mm, that is, the four-way stroke of the leg rest 3 is greater than or equal to 172+98=270 mm; the total height of the leg rest 3 when folded is less than or equal to 163 mm. The support height of the leg rest 3 after folding is less than or equal to 163 mm.

[0035] Taking the electric solution as an example, the working principle of the retractable leg support 3 of the car seat is as follows: when the leg support 3 is not needed, the leg support 3 can be folded under the seat 1, such as Figure 1-Figure 2 as well as Figure 5 As shown. When the leg rest 3 is needed, the driving motor 4 rotates, and through the meshing of the gear 41 and the rack 310A, the first supporting module 31 is driven to extend toward the front end of the seat 1. When the first supporting module 31 reaches the front end limit position, the first-level adjustment of the leg rest 3 is completed. In this state, if further adjustment is required, the screw motor 311 rotates the screw 311A, and through the cooperation of the screw 311A ​​and the nut structure 320A, the second supporting module 32 extends toward the front end and away from the first supporting module 31. When the second supporting module 32 moves to the front end limit position, the second-level adjustment of the leg rest 3 is completed. The folding process of the leg rest 3 is opposite to the unfolding process of the leg rest 3.

[0036] In this solution, the structure of the leg rest 3 is simpler than the existing six-link transmission structure of the leg rest, which can reduce the cost of the car seat. In addition, the leg rest 3 requires a small installation space, has a small volume after folding, and requires a small space for telescopic adjustment, so it can also be used in car seats with a lower seat 1. The spatial layout advantage is obvious and the scope of application is wider. The first-level adjustment of the leg rest 3 is two-way adjustment, and the second-level adjustment is four-way adjustment. The overall telescopic distance is long and can cover all body requirements. Electric adjustment mode and manual adjustment mode can be realized. It can be installed on the seat 1 or on the vehicle body.

Claims

1. A car seat with a retractable leg rest, characterized in that: include: A seat and a backrest, wherein the backrest is movably arranged on the seat; A leg rest is arranged below the seat and mounted on the seat or the vehicle body; the leg rest comprises a first supporting module and a second supporting module, the second supporting module being movably arranged on the first supporting module; The first supporting module is provided with a rack, the seat or the body is provided with a gear, the rack is meshed with the gear, and the first supporting module can be driven to move forward and backward by driving the gear to rotate; the first supporting module is provided with a screw motor; The second supporting module is provided with a nut structure, and the screw of the screw motor is inserted into the nut structure to form a screw-nut mechanism; the screw motor can drive the second supporting module to telescope forward and backward relative to the first supporting module.

2. The car seat with a retractable leg rest according to claim 1, characterized in that: The gear is rotatably mounted on the seat or the vehicle body via a rotating shaft; The rotating shaft is provided with a guide slide block, the first supporting module is provided with a slide groove, the guide slide block is located in the slide groove, and the guide slide block cooperates with the slide groove to guide the forward and backward telescopic movement of the first supporting module.

3. The car seat with a retractable leg support according to claim 2, characterized in that: A guide slider is provided on both sides of the gear on the rotating shaft, the first supporting module has a first supporting frame, and the rack is arranged in the middle of the first supporting frame; A slide groove is respectively arranged on both sides of the first supporting frame, one guide sliding block is located in one slide groove, and the other guide sliding block is located in the other slide groove.

4. The car seat with a retractable leg rest according to claim 3, characterized in that: The slide groove is arranged in an arc-shaped groove, and the first supporting frame is arranged in an arc shape.

5. The car seat with a retractable leg support according to any one of claims 2 to 4, characterized in that: The seat or the body is provided with a driving motor, and the output shaft of the driving motor is connected to or integrally provided with the rotating shaft; The driving motor can drive the first supporting module to telescope forward and backward by driving the gear to rotate.

6. The car seat with a retractable leg rest according to claim 1, characterized in that: The first supporting module is provided with a guide rod, the second supporting module is provided with a guide groove, and the guide rod is inserted into the guide groove; When the screw motor drives the second supporting module to telescope forward and backward relative to the first supporting module, the second supporting module slides along the guide rod.

7. The car seat with a retractable leg rest according to claim 6, characterized in that: The second supporting module has a second supporting frame, and the nut structure and the guide groove are both arranged on the second supporting frame.

8. The vehicle seat with a retractable leg rest according to claim 6 or 7, characterized in that: The guide rod is arranged in an arc-shaped rod; two guide rods are arranged on the first supporting module, and two guide grooves are arranged on the second supporting module, and the two guide rods are respectively inserted into the two guide grooves; The lead screw of the lead screw motor is located between the two guide rods.

9. The car seat with a retractable leg rest according to claim 2, characterized in that: A button is provided on the rotating shaft along one side of the gear, and a return spring is provided on the other side of the gear; By pressing the button, the gear and the rack can be disengaged, so that the first supporting module can be telescopically adjusted forward and backward; when the telescopic adjustment is completed, the reset spring can drive the gear to reset, and the gear resumes engagement with the rack, thereby limiting the first supporting module.

10. The car seat with a retractable leg rest according to claim 1, characterized in that: The leg rest can be folded under the seat, the first supporting module can be extended outwards to perform primary adjustment of the leg rest, and the second supporting module can be extended outwards to perform secondary adjustment of the leg rest; The extension stroke of the first-level adjustment of the leg rest is greater than or equal to 172 mm, the extension stroke of the second-level adjustment of the leg rest is greater than or equal to 98 mm, and the total height of the leg rest when folded is less than or equal to 163 mm.

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