Seat foot support and automobile seat

Abstract

The utility model discloses a seat foot support and an automobile seat, which comprises a foot support part arranged on a cushion component and a foot support driving part for driving the foot support part to rotate around the cushion component, and is characterized in that a foot support connecting shaft is arranged on the bottom surface of the foot support part, and the foot support driving part is connected with the foot support connecting shaft through a transmission mechanism; the transmission mechanism comprises a transmission part, a limiting part and a tension spring, the front end of the transmission part is rotationally connected with the foot support connecting shaft, the driving end of the foot support driving part is connected with the transmission part, a groove is formed in the transmission part, the foot support connecting shaft is rotationally arranged in the groove, and the foot support connecting shaft can move along the groove; a limiting groove is formed in the top of the front end of the limiting piece, the tension spring pulls the limiting piece to rotate in the first direction, and the limiting groove abuts against the outer surface of the bottom of the foot support connecting shaft. According to the seat foot support, the maintenance rate is reduced, and the service life of the seat foot support is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a seat, especially a seat foot support and an automobile seat. BACKGROUND

[0002] The automobile seat is the necessary configuration of the interior trim of the automobile, and is the most direct embodiment for the owner to perceive whether the vehicle is comfortable. The main factor affecting the comfort of the seat is still the man-machine engineering design of the seat.

[0003] The foot support is a relatively common structure in the automobile seat, which can greatly improve the comfort of the passenger. In the prior art, for example, the patent number "201921734904.1", the patent name "an automobile seat electric foot support", in this structure, a multi-link structure is used to drive the foot support to extend and retract, so as to realize the expansion and storage of the foot support. However, this structure has the following disadvantages:

[0004] The foot support has poor load bearing capacity, especially in the expanded state. If the user accidentally steps on it or a child directly steps on it, the gravity borne by the foot support exceeds its bearing limit, the multi-link structure will be damaged, resulting in a high maintenance rate and a short service life of the foot support. Therefore, how to solve the above technical problems is the direction that the technical personnel in this field need to strive for. SUMMARY

[0005] The utility model aims at providing a seat foot support and an automobile seat, which effectively reduces the maintenance rate of the seat foot support and prolongs the service life by using the structure.

[0006] To achieve the above-mentioned purpose, the utility model adopts the technical scheme: a seat foot support, comprising a foot support part rotatably installed at the front end of a seat cushion assembly, a foot support driving part is arranged below the seat cushion assembly, the foot support driving part drives the foot support part to rotate around the seat cushion assembly, and makes the foot support part expand or store, the bottom surface of the foot support part is provided with a foot support connecting shaft, and the foot support driving part is connected with the foot support connecting shaft through a transmission mechanism;

[0007] The transmission mechanism comprises a transmission part, a limiting part and a tension spring, the front end of the transmission part is rotatably connected with the foot support connecting shaft, the driving end of the foot support driving part is connected with the transmission part,

[0008] A groove is arranged on the transmission part, the foot support connecting shaft is rotatably arranged in the groove, and the foot support connecting shaft can move along the groove;

[0009] The middle part of the limiting part is rotatably connected with the rear end of the bottom part of the transmission part, a limiting groove is arranged on the front end top of the limiting part, the two ends of the tension spring are respectively connected with the transmission part and the limiting part, the tension spring drives the limiting part to rotate towards the first direction, and makes the limiting groove abut on the bottom outer surface of the foot support connecting shaft.

[0010] In the technical solution, the extension and retraction of the driving end of the foot support driving part drives the foot support part to rotate around the cushion assembly through the transmission part and the foot support connecting shaft.

[0011] In the technical solution, the front end of the limiting part is provided with a front end protrusion extending upward, the middle part of the top surface of the limiting part is provided with a middle protrusion, the limiting groove is formed above the limiting part between the front end protrusion and the middle protrusion, and the limiting groove is abutted on the bottom outer surface of the foot support connecting shaft by rotating the limiting part in the first direction through the pull spring.

[0012] In the technical solution, the front end of the limiting part is provided below the foot support connecting shaft, one end of the pull spring is connected with the front end of the bottom of the transmission part, the other end of the pull spring is connected with the rear end of the limiting part, and the limiting groove is abutted on the bottom outer surface of the foot support connecting shaft by rotating the limiting part in the first direction through the pull spring.

[0013] In the technical solution, the foot support part is provided with a connecting arm, the rear end of the connecting arm is rotatably connected with the front end of the cushion assembly on both sides, and the front end of the connecting arm is rotatably connected with the rear end of the cushion assembly.

[0014] The middle part of the connecting arm is provided with a connecting protrusion, and the foot support connecting shaft is arranged at the rear end of the connecting protrusion.

[0015] In the technical solution, the foot support driving part includes a foot support driving motor, a foot support lead screw and a foot support lead screw support, the foot support lead screw support and the foot support driving motor are installed on the cushion assembly, the foot support lead screw support is fixedly connected or rotatably connected with the cushion assembly, the foot support lead screw is screwed with a foot support lead screw nut in the foot support lead screw support, the foot support driving motor is configured to drive the foot support lead screw nut to rotate, and the front end of the foot support lead screw is connected with the transmission part.

[0016] In the technical solution, the length of the groove is greater than the diameter of the foot support connecting shaft, and the width of the groove is greater than or equal to the diameter of the foot support connecting shaft.

[0017] In the technical solution, the groove is an arc-shaped groove.

[0018] The utility model also provides a kind of automobile seat, it is characterized in that: the seat foot support of above, the rear end of the cushion assembly is provided with backrest assembly, the bottom of the backrest assembly is rotatably connected with the rear end of the cushion assembly, or the bottom of the backrest assembly is rotatably connected with a crossbeam.

[0019] Compared with the prior art, the utility model has the following advantages due to the above technical solution:

[0020] 1. In this utility model, a groove is provided on the transmission component, the footrest connecting shaft rotates in the groove, and the footrest connecting shaft can move in the groove. A limiting component and a tension spring are also provided. The tension spring pulls the limiting component to rotate, causing the limiting groove to lock the footrest connecting shaft. When the footrest is in the unfolded state and the external force exceeds the limiting force given by the tension spring to the limiting groove of the limiting component locking the footrest connecting shaft, the footrest connecting shaft will squeeze the limiting component and disengage from the limiting groove, and move in the groove. This causes the footrest connecting shaft to move along the groove and flip towards the storage direction, thereby preventing damage to the transmission component and the footrest drive unit. Afterwards, it is only necessary to reset the footrest connecting shaft into the limiting groove, effectively extending the service life of the footrest and reducing the maintenance rate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the seat footrest in Embodiment 1 of this utility model;

[0022] Figure 2 This is a structural schematic diagram of the bottom of the seat footrest in Embodiment 1 of this utility model;

[0023] Figure 3 This is a schematic diagram of the seat footrest in Embodiment 1 of this utility model (showing the seat cushion assembly).

[0024] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure;

[0025] Figure 5 yes Figure 3 A schematic diagram of the three-dimensional structure;

[0026] Figure 6 This is a schematic diagram of the footrest drive unit and transmission mechanism in Embodiment 1 of this utility model;

[0027] Figure 7 yes Figure 6 A schematic diagram of the disassembled structure of the transmission mechanism;

[0028] Figure 8 This is a structural schematic diagram of a car seat in Embodiment 1 of this utility model (with two car seats installed).

[0029] The components include: 1. Seat cushion assembly; 2. Backrest assembly; 3. Crossbeam; 4. Footrest section; 41. Footrest drive section; 42. Footrest connecting shaft; 43. Transmission mechanism; 44. Connecting arm; 410. Footrest drive motor; 411. Footrest lead screw; 412. Footrest lead screw bracket; 430. Transmission component; 431. Limiting component; 432. Tension spring; 440. Connecting protrusion; 441. Left arm; 442. Right side wall; 443. Middle connecting tube; 4301. Groove; 4310. Limiting groove; 4311. Front protrusion; 4312. Middle protrusion. DETAILED DESCRIPTION

[0030] The utility model will be further described below in combination with the drawings and examples:

[0031] Example one: see Figures 1-8 As shown in the figure, a seat foot rest, including the foot rest part 4 of rotating installation in the front end of the cushion assembly 1, the bottom of the cushion assembly 1 is equipped with a foot rest drive part 41, the foot rest drive part 41 drives the foot rest part 4 around the cushion assembly 1 rotates, and makes the foot rest part 4 unfold or is stored, the bottom surface of the foot rest part 4 is equipped with foot rest connecting shaft 42, the foot rest drive part 41 is connected with the foot rest connecting shaft 42 through transmission mechanism 43,

[0032] The transmission mechanism 43 includes transmission part 430, limiting piece 431 and tension spring 432, the front end of the transmission part 430 is rotationally connected with the foot rest connecting shaft 42, the drive end of the foot rest drive part 41 is connected with the transmission part 430,

[0033] The transmission part 430 is equipped with a groove 4301, the foot rest connecting shaft 42 is rotationally arranged in the groove 4301, and the foot rest connecting shaft 42 can move along the groove 4301;

[0034] The middle part of the limiting piece 431 is rotationally connected with the rear end of the bottom of the transmission part 430, the front end top of the limiting piece 431 is equipped with a limiting groove 4310, the two ends of the tension spring 432 are connected with the transmission part 430 and limiting piece 431 respectively, the tension spring 432 pulls the limiting piece 431 to rotate towards the first direction, and makes the limiting groove 4310 abut on the bottom outer surface of the foot rest connecting shaft 42, and the limiting groove 4310 pushes the top of the foot rest connecting shaft 42 to abut on the top surface of the groove 4301.

[0035] In the embodiment, the extension and retraction of the drive end of the foot rest drive part drives the foot rest part to rotate around the cushion assembly through the transmission part and the foot rest connecting shaft. The drive end of the foot rest drive part retracts, drives the rear movement of the transmission part, simultaneously drives the foot rest part to rotate around the cushion assembly towards a direction, drives the bottom of the foot rest part to rotate close to the front end of the cushion assembly, and makes the front end of the foot rest part close to the cushion assembly, until the front end of the foot rest part close to the front side of the cushion assembly, or contact with the front side of the cushion assembly, realizes the storage of the foot rest part. When it is needed to unfold the foot rest part, the drive end of the foot rest drive part extends, pushes the front movement of the transmission part, when the transmission part moves forward, it will push the foot rest part to rotate around the cushion assembly towards another direction, drives the bottom of the foot rest part to rotate towards the direction away from the front end of the cushion assembly, and makes the front end of the foot rest part away from the cushion assembly, makes the foot rest part rotate to be substantially parallel with the cushion assembly, thereby realizes the unfolding of the foot rest part.

[0036] In this embodiment, due to the presence of the limiting piece and the tension spring, the tension spring pulls the limiting piece to rotate towards the first direction, taking the direction as an example, the first direction is the clockwise direction, so that the limiting groove is abutted against the bottom outer surface of the foot support connecting shaft, and gives the foot support connecting shaft an upward pushing force, so that the top outer surface of the foot support connecting shaft is abutted against the top surface of the groove. Since the rotating connection position of the limiting piece and the transmission piece to the groove does not change, in this embodiment, when the bottom outer surface of the limiting groove and the foot support connecting shaft is in contact, and the top outer surface of the foot support connecting shaft is pushed by the limiting piece to abut against the top surface of the groove, at this time the foot support connecting shaft is at the front end of the groove, during the process of driving the transmission piece to move forward and drive the foot support to expand, the clamping force of the limiting piece and the transmission piece to the foot support connecting shaft will be greater than the pushing force of the foot support connecting shaft to separate from the limiting groove, therefore, when the transmission piece moves forward, the limiting piece and the transmission piece will simultaneously push the foot support connecting shaft to move and drive the foot support part to rotate and expand. At this time, the foot support part can bear a certain weight, when the foot support part in the expanded state is subjected to a large external force (a direct and complete external force that may cause damage to the foot support driving part, the transmission piece or the connection therebetween), in the conventional state, the foot support driving part, the transmission piece or the connection therebetween is damaged, but in this embodiment, when the foot support part in the expanded state is subjected to a large external force, it will transmit the external force to the foot support connecting shaft, since the top of the foot support part (the rear side of the foot support part in the expanded state) is rotationally connected to the front end of the cushion assembly, the foot support connecting shaft is below the connection between the foot support part and the cushion assembly (the foot support connecting shaft is on the front side of the connection between the foot support part and the cushion assembly in the expanded state), the foot support connecting shaft will have a downward pushing force towards the rear, which will press the limiting groove, due to the presence of the tension spring, the limiting piece will be pushed to rotate towards the second direction, further stretching the tension spring, until the foot support connecting shaft moves rearward to separate from the limiting groove, and moves along the groove rearward, during this process, the foot support part will rotate towards the storage direction, thereby making the foot support part inclined, so that the external force cannot directly press on the foot support part, thereby preventing damage to the foot support part, the transmission piece and the foot support driving part. When the foot support part needs to be reset (restored to the original state), the bottom of the foot support part is turned upwards towards the front, so that the foot support connecting shaft moves forward along the groove (after the foot support connecting shaft separates from the limiting groove, the tension spring will further pull the foot support connecting shaft to continue to rotate towards the first direction, so that the front end of the limiting piece is at the front end of the foot support connecting shaft), the foot support connecting shaft will touch the limiting piece and press the limiting piece, so that the limiting piece rotates towards the second direction (the rotating direction of the second direction is opposite to that of the first direction), until the foot support connecting shaft rotates to the limiting groove, the limiting groove of the limiting piece is clamped into the bottom of the foot support connecting shaft, achieving limiting of the foot support connecting shaft, thereby achieving resetting of the foot support part. In this structure, the damage to the foot support can be effectively prevented, the maintenance rate is reduced, and the service life is prolonged.

[0037] Referring to Figure 4 , 7As shown, the front end of the limiting member 431 has an upwardly extending front protrusion 4311, and the middle part of the top surface of the limiting member 431 has a central protrusion 4312. The limiting groove 4310 is formed above the limiting member 431 between the front protrusion 4311 and the central protrusion 4312. The tension spring 432 pulls the limiting member 431 to rotate in the first direction, and the limiting groove 4310 abuts against the bottom outer surface of the foot support connecting shaft 42. The front and rear sides of the central protrusion are both arc-shaped surfaces, which facilitates the foot support connecting shaft to move backward through the central protrusion and disengage from the limiting groove, thereby preventing damage to the foot support due to force. It also facilitates the foot support connecting shaft to enter the limiting groove through the central protrusion, realizing the reset of the foot support and the transmission component.

[0038] See Figures 4-7 As shown, the front end of the limiting member 431 is located below the foot support connecting shaft 42. One end of the tension spring 432 is connected to the bottom front end of the transmission member 430, and the other end of the tension spring 432 is connected to the rear end of the limiting member 431. The tension spring 432 pulls the limiting member 431 to rotate in the first direction and causes the limiting groove 4310 to abut against the bottom outer surface of the foot support connecting shaft 42.

[0039] The middle part of the limiting component is rotatably connected to the transmission component. Its front end is used for limiting the foot support shaft, and its rear end is used for connecting the tension spring.

[0040] See Figure 4 , 5 As shown, the footrest 4 is provided with a connecting arm 44, and the two rear ends of the connecting arm 44 are respectively rotatably connected to the front end of the seat cushion assembly 1.

[0041] The connecting arm 44 has a connecting protrusion 440 in the middle, and the foot support shaft 42 is located at the rear end of the connecting protrusion 440.

[0042] In this embodiment, the connecting arm 44 has an "I"-shaped structure, including a left arm 441, a right side wall 442, and a middle connecting tube 443. The two ends of the middle connecting tube are connected to the middle of the left and right arms, respectively. The front ends of the left and right arms are connected to the footrest, respectively. The rear ends of the left and right arms are rotatably connected to the front sides of the seat cushion assembly. The front end of the connecting protrusion is perpendicularly connected to the middle of the middle connecting tube. In this embodiment, the transmission component has a downward-opening U-shaped structure with two grooves located on the side walls of the transmission component on both sides of the opening. The two ends of the footrest connecting shaft are located within the two grooves. The front end of the limiting component is located within the opening, and the rear end of the limiting component is located outside the rear side of the transmission component. The rear end of the tension spring is also located below the transmission component.

[0043] See Figures 3-7As shown, the footrest driving part 41 comprises a footrest driving motor 410, a footrest screw rod 411 and a footrest screw rod support 412, the footrest screw rod support 412 and the footrest driving motor 410 are installed on the cushion assembly 1, and the footrest screw rod support 412 is fixedly connected or rotatably connected with the cushion assembly 1, the footrest screw rod 411 is screwed with a footrest screw rod nut inside the footrest screw rod support 412, the footrest driving motor 410 is configured to drive the footrest screw rod nut to rotate, and the front end of the footrest screw rod 412 is connected with the transmission part 430.

[0044] In the embodiment, the footrest screw rod is screwed with the footrest screw rod nut inside the footrest screw rod support (the footrest screw rod nut is rotatably installed inside the footrest screw rod support), when the footrest driving motor drives the footrest screw rod nut to rotate, the footrest screw rod will be synchronously moved forward and backward, thereby pushing the transmission part to move forward and backward, and further driving the footrest part to rotate, so as to realize the unfolding and storage of the footrest part.

[0045] Preferably, the length of the groove is greater than the diameter of the footrest connecting shaft, and the width of the groove is greater than or equal to the diameter of the footrest connecting shaft.

[0046] Preferably, the groove is an arc-shaped groove.

[0047] Preferably, the groove is an arc-shaped groove. Figure 8 As shown, the utility model also provides an automobile seat, including the seat footrest, the rear end of the cushion assembly 1 is provided with backrest assembly 2, the bottom of backrest assembly 2 is rotatably connected with the rear end of the cushion assembly 1, or the bottom of backrest assembly 2 is rotatably connected with a crossbeam 3.

[0048] In the utility model, the bottom of the backrest assembly can be directly rotatably connected with the rear end of the cushion assembly, so that the backrest assembly and the cushion assembly are an integral whole, of course, the backrest assembly can also be a split structure with the cushion assembly, so that the bottom of the backrest assembly is rotatably connected with the crossbeam.

[0049] In the description of the utility model, need understanding is, the term "upper", "lower", "top", "bottom", "internal", "external" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only is for the convenience of describing the present application and simplifying the description, and is not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore cannot be understood as the limitation to the present application. In the description of the utility model, the meaning of "a plurality of" is two or more than two, unless there is a clear specific limitation.

[0050] In the utility model, unless there is a clear provision and limitation, the term "installation", "connection", "connection", "fix" and so on should be broad understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, for example, two through abutment, contact and so on form mechanical abutment or contact connection mode, two also can be directly hung or through intermediate medium hang up and connect and so on, also can be two element internal communication or two element interaction relation. For ordinary skilled in the art, can understand the specific meaning of the above-mentioned term in the present application according to specific circumstances.

Claims

1. A seat footrest comprising a footrest portion pivotally mounted to a front end of a seat cushion assembly, a footrest drive portion being provided below the seat cushion assembly, the footrest drive portion driving the footrest portion to rotate about the seat cushion assembly and to deploy or stow the footrest portion, characterised in that: The bottom surface of the foot rest part is provided with a foot rest connecting shaft, and the foot rest driving part is connected with the foot rest connecting shaft through a transmission mechanism; The transmission mechanism comprises a transmission member, a limiting member and a tension spring, the front end of the transmission member is rotationally connected with the foot rest connecting shaft, and the driving end of the foot rest driving part is connected with the transmission member, The transmission member is provided with a groove, the foot rest connecting shaft is rotationally arranged in the groove, and the foot rest connecting shaft can move along the groove; The middle part of the limiting member is rotationally connected with the rear end of the bottom part of the transmission member, the front end top of the limiting member is provided with a limiting groove, the two ends of the tension spring are respectively connected with the transmission member and the limiting member, the tension spring drives the limiting member to rotate towards the first direction, and the limiting groove is abutted on the bottom outer surface of the foot rest connecting shaft.

2. The seat leg rest of claim 1, wherein: The extension and retraction of the driving end of the foot rest driving part drives the foot rest part to rotate around the cushion assembly through the transmission member and the foot rest connecting shaft.

3. The seat leg rest of claim 1, wherein: The front end of the limiting member is provided with a front end protrusion extending upwards, the middle part of the top surface of the limiting member is provided with a middle part protrusion, the limiting groove is formed above the limiting member between the front end protrusion and the middle part protrusion, the tension spring drives the limiting member to rotate towards the first direction, and the limiting groove is abutted on the bottom outer surface of the foot rest connecting shaft.

4. The seat leg rest of claim 1, wherein: The front end of the limiting member is arranged below the foot rest connecting shaft, one end of the tension spring is connected with the front end of the bottom part of the transmission member, the other end of the tension spring is connected with the rear end of the limiting member, the tension spring drives the limiting member to rotate towards the first direction, and the limiting groove is abutted on the bottom outer surface of the foot rest connecting shaft.

5. The seat leg rest of claim 1, wherein: The foot rest part is provided with a connecting arm, the rear end of the connecting arm is rotationally connected with the front end of the cushion assembly on both sides; The middle part of the connecting arm is provided with a connecting protrusion, and the foot rest connecting shaft is arranged at the rear end of the connecting protrusion.

6. The seat leg rest of claim 1, wherein: The foot rest driving part comprises a foot rest driving motor, a foot rest lead screw and a foot rest lead screw support, the foot rest lead screw support and the foot rest driving motor are installed on the cushion assembly, the foot rest lead screw support is fixedly connected or rotationally connected with the cushion assembly, the foot rest lead screw is screwed with a foot rest lead screw nut in the foot rest lead screw support, the foot rest driving motor is configured to drive the foot rest lead screw nut to rotate, and the front end of the foot rest lead screw is connected with the transmission member.

7. The seat leg rest of claim 1, wherein: The length of the groove is greater than the diameter of the foot rest connecting shaft, and the width of the groove is greater than or equal to the diameter of the foot rest connecting shaft.

8. The seat footrest of claim 1 or 7, wherein: The groove is an arc-shaped groove.

9. An automotive seat characterized by: The seat chair comprises the seat cushion assembly and a backrest assembly, the backrest assembly is rotationally connected with the rear end of the seat cushion assembly or the bottom of the backrest assembly is rotationally connected with a cross beam.

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