Push-pull folding footrest and seat

Abstract

This invention discloses a push-pull retractable footrest and a seat. The push-pull retractable footrest includes a footrest, an outer telescopic component, an inner telescopic component, a connecting mechanism, a joint locking mechanism, and a position locking mechanism. The inner telescopic component is slidably connected to the outer telescopic component, and the linkage mechanism is rotatably connected to the footrest. The joint locking mechanism includes a locking head that locks or unlocks the footrest, and the position locking mechanism is locked at a first limiting part or a second limiting part. The seat includes a push-pull retractable footrest. In this invention, the linkage mechanism, joint locking mechanism, and position locking mechanism are linked together with the sliding of the inner telescopic component relative to the outer telescopic component, and perform corresponding unlocking, locking, and footrest rotation actions. When the footrest needs to be retracted, the user only needs to push or pull the inner telescopic component to switch the footrest's state. Furthermore, the footrest and the inner telescopic component can be locked after the footrest is retracted, keeping the footrest stable. The retraction and retraction actions are minimal, resulting in high operational convenience.

Description

Technical Field

[0001] This invention relates to the field of seating technology, and more particularly to a push-pull retractable footrest and seat. Background Technology

[0002] The footrests on the seats support the user's legs and feet, improving comfort. To ensure stability during use, the footrests typically have a locking mechanism. In related technologies, the extension and locking of the footrests are independent. Users must first unlock the footrests, then extend them to the appropriate angle, and finally lock them. This process involves multiple actions and is cumbersome. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a push-pull retractable foot pedal, which can improve the convenience of retracting the foot pedal.

[0004] The present invention also proposes a seat having the aforementioned push-pull retractable footrest.

[0005] According to a first aspect of the present invention, a push-pull retractable foot pedal includes:

[0006] Foot pedal;

[0007] An external telescopic assembly includes an external telescopic tube and a first end, the first end being connected to one end of the external telescopic tube, and the external telescopic tube having a first limiting portion, a second limiting portion, and a third limiting portion spaced apart.

[0008] The inner telescopic assembly includes an inner telescopic tube, a first end seat, and a second end seat. The first end seat and the second end seat are respectively connected to both ends of the inner telescopic tube. The second end seat and part of the inner telescopic tube are housed inside the outer telescopic tube and are slidably connected to the outer telescopic tube. The first end seat is located outside the outer telescopic tube. The foot pedal is rotatably connected to the first end seat.

[0009] The linkage mechanism has one end rotatably connected to the foot pedal and the other end inserted into the interior of the inner telescopic tube and connected to the second end seat. The rotation axis of the foot pedal relative to the second end seat is spaced apart from the rotation axis of the foot pedal relative to the linkage mechanism. The linkage mechanism can move with the movement of the inner telescopic tube and is limited to the third limiting part.

[0010] The joint locking mechanism includes a locking head that is slidably connected to the first end seat and can extend out of the first end seat to lock the foot pedal as the inner telescopic tube moves, or retract into the first end seat to unlock the foot pedal.

[0011] A position locking mechanism is connected to the second end seat and can lock itself to the first limiting part and the second limiting part as the second end seat moves.

[0012] The push-pull retractable foot pedal according to an embodiment of the present invention has at least the following beneficial effects:

[0013] In this invention, the linkage mechanism, joint locking mechanism, and position locking mechanism are linked together as the inner telescopic component slides relative to the outer telescopic component, and perform corresponding unlocking, locking, and pedal rotation actions. When the pedal needs to be retracted, the user only needs to push or pull the inner telescopic component to switch the pedal's state. Furthermore, the pedal and the inner telescopic tube assembly can be locked after the pedal is retracted, keeping the pedal stable. The retraction and retraction actions are minimal, and the operation is highly convenient.

[0014] According to some embodiments of the present invention, the linkage mechanism includes a first link and a second link rotatably connected. The end of the first link opposite to the second link is rotatably connected to the foot pedal. The second link is slidably connected to the inner telescopic tube. The first end seat is provided with a through moving channel. The first link passes through the moving channel and is able to swing within the moving channel.

[0015] According to some embodiments of the present invention, the end of the first end seat facing away from the inner telescopic tube is provided with a mounting groove, the mounting groove is connected to the moving channel, and part of the foot pedal is inserted into the mounting groove.

[0016] According to some embodiments of the present invention, the linkage mechanism includes a limiting shaft, the first link and the second link are rotatably connected through the limiting shaft, the inner telescopic tube has a first limiting groove extending in the sliding direction, the limiting shaft passes through the first limiting groove and can abut against the groove wall of the first limiting groove.

[0017] According to some embodiments of the present invention, the second end seat is provided with a guide channel extending through the inner telescopic tube in the sliding direction, the second connecting rod is inserted into the guide channel, the second connecting rod has a second limiting groove extending in the sliding direction of the inner telescopic tube, the second end seat has a limiting post, the limiting post is slidably connected in the second limiting groove, and can abut against the groove wall of the second limiting groove.

[0018] According to some embodiments of the present invention, the joint locking mechanism further includes a mounting base and a linkage head. The mounting base is connected to the first end seat. Part of the linkage head is located inside the mounting base. The linkage head is rotatably connected to the mounting base. The locking head is drivenly connected to one end of the linkage head. The other end of the linkage head passes through the first end seat and protrudes to the outside of the inner telescopic tube. The outer telescopic assembly includes a second end head. The second end head is located at the end of the outer telescopic tube away from the first end head. The linkage head can move to the second end head following the movement of the first end seat, and can be pushed by the second end head to drive the locking head back, or move away from the second end head to extend the locking head.

[0019] According to some embodiments of the present invention, at least a portion of the second end is located inside the outer telescopic tube, and the inner diameter of the second end is smaller than the inner diameter of the outer telescopic tube.

[0020] According to some embodiments of the present invention, the third limiting part is located at the end of the second end, the linkage mechanism includes a first link, a second link and a limiting shaft, the first link and the second link are rotatably connected through the limiting shaft, the length of the limiting shaft is greater than the inner diameter of the second end, the limiting shaft can move with the inner telescopic tube and abut against the third limiting part.

[0021] According to some embodiments of the present invention, the position locking mechanism includes a telescopic head that is radially slidably connected to the interior of the second end seat along the inner telescopic tube. The telescopic head can extend to the outside of the inner telescopic tube to lock onto the first limiting part or the second limiting part, or retract to the interior of the second end seat to release the lock with the first limiting part or the second limiting part.

[0022] A seat according to a second aspect embodiment of the present invention includes:

[0023] The first aspect of the embodiment includes a push-pull retractable foot pedal;

[0024] The seat body, wherein the external telescopic tube assembly is mounted on the seat body.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0027] Figure 1 This is a schematic diagram of the push-pull retractable foot pedal of the present invention in a folded state;

[0028] Figure 2 for Figure 1 Cross-sectional view of the push-pull retractable foot pedal;

[0029] Figure 3 This is a schematic diagram of the push-pull retractable foot pedal of the present invention in the extended state;

[0030] Figure 4 This is an exploded view of one embodiment of the push-pull retractable foot pedal of the present invention;

[0031] Figure 5 A cross-sectional view of one embodiment of the external telescopic component;

[0032] Figure 6 for Figure 3 Enlarged view of point A in the middle;

[0033] Figure 7 This is a schematic diagram showing the interaction between the position locking mechanism and the outer telescopic tube in the folded state.

[0034] Figure 8 This is a schematic diagram showing the connection between the first end seat and the foot pedal;

[0035] Figure 9 for Figure 2 Enlarged view of point B in the middle;

[0036] Figure 10 This is a schematic diagram showing the connection between the linkage mechanism and the second end seat.

[0037] Figure label:

[0038] Foot pedal 100, limiting groove 110, arc groove wall 111, flat groove wall 112, insertion groove 120;

[0039] Inner telescopic component 200, inner telescopic tube 210, first limiting groove 211, first end seat 220, moving channel 221, mounting groove 222, second end seat 230, limiting post 231;

[0040] External telescopic component 300, external telescopic tube 310, first limiting part 311, second limiting part 312, first end 320, third limiting part 330, second end 340;

[0041] Linkage mechanism 400, first link 410, second link 420, second limiting groove 421, insertion part 422, connecting part 223, limiting shaft 430;

[0042] Joint locking mechanism 500, locking head 510, limiting arc surface 511, limiting plane 512, mounting base 520, linkage head 530, elastic element 540, linkage cable 550;

[0043] Position locking mechanism 600, telescopic head 610, and abutment 620;

[0044] Operating lever 700. Detailed Implementation

[0045] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0046] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0047] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0048] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0049] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] An embodiment of the present invention provides a push-pull retractable foot pedal. Figure 1 and Figure 2 This is a diagram showing the pedal 100 in a folded state. Figure 3This is a schematic diagram of the pedal 100 in its extended state. The push-pull retractable pedal includes pedal 100, inner telescopic component 200, outer telescopic component 300, linkage mechanism 400, joint locking mechanism 500, and position locking mechanism 600. The movement principle of the push-pull retractable pedal is as follows: the inner telescopic component 200 and the outer telescopic component 300 are interlocked, and the inner telescopic component 200 can slide relative to the outer telescopic component 300. Pedal 100 is rotatably connected to the inner telescopic component 200. Both the linkage mechanism 400 and the joint locking mechanism 500 can move along with the sliding of the inner telescopic component 200. The position locking mechanism 600 is used to lock the position of the inner telescopic component 200 so that the inner telescopic component 200 is in the position of the pedal 100. When fully unfolded or folded, the pedal 100 is limited. The joint locking mechanism 500 is used to unlock the pedal 100 when it needs to be rotated, and to lock the pedal 100 after it has been unfolded or folded, so that the pedal 100 is stable in the unfolded or folded state. The linkage mechanism 400 follows the sliding of the inner telescopic tube 210 to drive the pedal 100 to rotate, so that the pedal 100 can be unfolded or folded. In this way, when the pedal 100 needs to be unfolded or folded, it is only necessary to push or pull the inner telescopic component 200 so that the inner telescopic component 200 slides relative to the outer telescopic component 300, which can link other motion mechanisms to realize the unfolding and locking of the pedal 100, effectively improving the convenience of unfolding and folding the pedal 100.

[0051] Specifically, refer to Figure 4 and Figure 5 The external telescopic assembly 300 includes an external telescopic tube 310 and a first end 320. The first end 320 is connected to one end of the external telescopic tube 310. The external telescopic tube 310 has a first limiting portion 311 and a second limiting portion 312 spaced apart. (Refer to...) Figure 6 and Figure 7The inner telescopic assembly 200 includes an inner telescopic tube 210, a first end seat 220 and a second end seat 230. The first end seat 220 and the second end seat 230 are respectively connected to the two ends of the inner telescopic tube 210. The second end seat 230 and the inner telescopic tube 210 are housed inside the outer telescopic tube 310 and are slidably connected to the outer telescopic tube 310. The first end seat 220 is located outside the outer telescopic tube 310. The position locking mechanism 600 is connected to the second end seat 230 and can slide with the second end seat 230 inside the outer telescopic tube 310. The first limiting part 311 and the second limiting part 312 are arranged along the extending direction of the outer telescopic tube 310 and are located on the moving path of the position locking mechanism 600. The first limiting part 311 is closer to the first end 320 than the second limiting part 312. The first limiting part 311 is used to limit the position locking mechanism 600 when the pedal 100 is in the folded state, and the second limiting part 312 is used to limit the position locking mechanism 600 when the pedal 100 is in the unfolded state. Thus, when the inner telescopic component 200 is pushed, the inner telescopic tube 210 slides toward the inside of the outer telescopic tube 310. When the inner telescopic tube 210 slides relative to the outer telescopic tube 310 until the position locking mechanism 600 is locked by the first limiting part 311, the foot pedal 100 is in a folded state and the position of the inner telescopic component 200 relative to the outer telescopic component 300 is fixed. When the inner telescopic component 200 is pulled, the inner telescopic tube 210 slides towards the outside of the outer telescopic tube 310. When the inner telescopic tube 210 slides relative to the outer telescopic tube 310 until the position locking mechanism 600 is locked by the second limiting part 312, the foot pedal 100 is in an unfolded state and the position of the inner telescopic component 200 relative to the outer telescopic component 300 is fixed.

[0052] Reference Figure 4 and Figure 10 One end of the linkage mechanism 400 is rotatably connected to the foot pedal 100, and the other end is inserted into the interior of the inner telescopic tube 210 and connected to the second end seat 230. The foot pedal 100 is rotatably connected to the first end seat 220. The rotation axis of the foot pedal 100 relative to the second end seat 230 is spaced apart from the rotation axis of the foot pedal 100 relative to the linkage mechanism 400. The outer telescopic component 300 also includes a third limiting part 330. The first limiting part 311, the second limiting part 312 and the third limiting part 330 are arranged in sequence. The linkage mechanism 400 can move with the movement of the inner telescopic tube 210 and is limited to the third limiting part 330. When the linkage mechanism 400 moves to the third limiting part 330, it is limited by the third limiting part 330 and cannot continue to move. When the inner telescopic tube 210 continues to slide relative to the outer telescopic tube 310, the foot pedal 100 continues to be pulled by the first end seat 220 and moves with the first end seat 220. Since the foot pedal 100 is simultaneously rotatably connected to the linkage mechanism 400 and the first end seat 220, the foot pedal 100 is pulled by the linkage mechanism 400 and rotates relative to the first end seat 220, realizing the extension and retraction of the foot pedal 100.

[0053] The joint locking mechanism 500 includes a locking head 510, which is slidably connected to the first end seat 220 and extends out of the first end seat 220 to lock the foot pedal 100 as the inner telescopic tube 210 moves, or retracts into the first end seat 220 to unlock the foot pedal 100. When the foot pedal 100 rotates to the folded or unfolded position, the locking head 510 extends out of the first end seat 220 and locks the foot pedal 100, locking the foot pedal 100 in the folded or unfolded state; before the foot pedal 100 rotates, the locking head 510 retracts into the first end seat 220 to avoid the foot pedal 100, the foot pedal 100 is unlocked and can rotate relative to the first end seat 220 for folding or unfolding.

[0054] Thus, in the embodiments of the present invention, the linkage mechanism 400, the joint locking mechanism 500, and the position locking mechanism 600 are linked together as the inner telescopic component 200 slides relative to the outer telescopic component 300, and perform corresponding unlocking, locking, and pulling actions to rotate the pedal 100. When the pedal 100 needs to be retracted, the user only needs to push or pull the inner telescopic component 200 to switch the state of the pedal 100. Moreover, the pedal 100 and the inner telescopic tube 210 assembly can be locked after the pedal 100 has been retracted, so that the pedal 100 remains stable. The retraction and retraction actions are fewer, and the operation is more convenient.

[0055] like Figure 1 As shown, the push-pull retractable foot pedal includes two sets of inner telescopic components 200, outer telescopic components 300, a linkage mechanism 400, a joint locking mechanism 500, and a position locking mechanism 600. The push-pull retractable foot pedal also includes an operating lever 700. Two first end seats 220 are respectively connected to the two ends of the operating lever 700. The two first end seats 220 are respectively rotatably connected to the two ends of the foot pedal 100. When the foot pedal 100 needs to be retracted, the operating lever 700 is pushed or pulled, and the operating lever 700 can drive the two inner telescopic components 200 to slide synchronously. The foot pedal 100 is simultaneously supported and driven by the two first end seats 220, making the retraction and retraction of the foot pedal 100 more stable.

[0056] The linkage mechanism 400 includes a first link 410 and a second link 420 rotatably connected. The end of the first link 410 facing away from the second link 420 extends to the outside of the inner telescopic tube 210 and is rotatably connected to the foot pedal 100. The second link 420 is slidably connected to the inner telescopic tube 210. Figure 8As shown (part of the foot pedal is hidden for easy display), the first end seat 220 is provided with a through moving channel 221, and the first connecting rod 410 passes through the moving channel 221 and can swing within the moving channel 221. When the inner telescopic tube 210 slides outward relative to the outer telescopic tube 310, the first connecting rod 410 and the second connecting rod 420 slide synchronously with the inner telescopic tube 210. When the inner telescopic tube 210 moves to the preset position of the outer telescopic tube 310, the linkage mechanism 400 is limited by the third limiting part 330, and the outward sliding is restricted. When the inner telescopic component 200 is pulled outward, due to the offset of the rotation axis of the foot pedal 100 from the first end seat 220 and the first connecting rod 410, the foot pedal 100 is pulled by the first connecting rod 410 and rotates relative to the first end seat 220. At the same time, the first connecting rod 410 rotates relative to the second connecting rod 420 and swings radially along the inner telescopic tube 210 in the moving channel 221 to adapt to the rotation of the foot pedal 100 relative to the first end seat 220 and avoid interference with the rotation of the foot pedal 100.

[0057] Furthermore, the first end seat 220 has a mounting groove 222 at one end facing away from the inner telescopic tube 210. The mounting groove 222 is connected to the moving channel 221. Part of the foot pedal 100 is inserted into the mounting groove 222, and the first connecting rod 410 is inserted into the mounting groove 222 through the moving channel 221 and is rotatably connected to the foot pedal 100. The opening of the mounting groove 222 is adapted to the part of the foot pedal 100 inserted into the mounting groove 222. When the foot pedal 100 rotates relative to the first end seat 220, the groove wall of the mounting groove 222 limits the foot pedal 100, preventing the foot pedal 100 from swaying during rotation and improving the stability of the foot pedal 100's retraction and extension. In addition, by setting the mounting groove 222, the connection between the first connecting rod 410, the first end seat 220 and the foot pedal 100 is made more compact.

[0058] The linkage mechanism 400 also includes a limiting shaft 430. The first link 410 and the second link 420 are rotatably connected via the limiting shaft 430. The inner telescopic tube 210 has a first limiting groove 211 extending along its sliding direction. The limiting shaft 430 passes through the first limiting groove 211 and can abut against the groove wall of the first limiting groove 211. The first limiting groove 211 is used to limit the mutual sliding between the linkage mechanism 400 and the inner telescopic tube 210. When the inner telescopic tube 210 moves to the unfolded or folded state of the foot pedal 100, it is limited by the limiting shaft 430. The limiting shaft 430 and the position locking mechanism 600 combine to limit and lock the inner telescopic tube 210. After the linkage mechanism 400 is limited by the third limiting part 330, the first limiting groove 211 allows the linkage mechanism 400 and the inner telescopic tube 210 to slide relative to each other, so that the foot pedal 100 is pulled by the linkage mechanism 400 and rotates.

[0059] Additionally, the second end seat 230 is provided with a guide channel 231 extending through the inner telescopic tube 210 in the sliding direction. The second connecting rod 420 passes through the guide channel 231 and can slide within it. The second connecting rod 420 has a second limiting groove 421 extending in the sliding direction of the inner telescopic tube 210. The second end seat 230 has a limiting post 232, which is slidably connected within the second limiting groove 421 and can abut against the groove wall of the second limiting groove 421. The limiting post 232 is used to limit the sliding distance of the second connecting rod 420 relative to the second end seat 230 and cooperates with the second limiting groove 421 to guide the sliding of the second connecting rod 420 relative to the second end seat 230. The guide channel 231 allows the second connecting rod 420 to extend to the outside of the second end seat 230 so that it can abut against the first end 320, thus limiting the movement of the linkage mechanism 400.

[0060] It should be noted that the linkage mechanism 400, following the movement of the inner telescopic tube 210, is limited by the third limiting part 330 and the first end 320 respectively. When the foot pedal 100 switches from the folded to the unfolded state, the linkage mechanism 400 follows the inner telescopic tube 210 to move towards the outer telescopic tube 310 away from the first end 320. When the limiting shaft 430 moves to the third limiting part 330, it is limited by the third limiting part 330 and cannot move. When the inner telescopic tube 210 continues to slide, the limiting shaft 430 slides in the first limiting groove 211, so that the linkage mechanism 400 can follow the movement of the inner telescopic tube 210 and move within the limiting groove. After the limit is reached, the inner telescopic tube 210 is allowed to continue sliding. When the foot pedal 100 switches from the unfolded state to the folded state, the linkage mechanism 400 moves toward the first end 320 along with the inner telescopic tube 210. When the second link 420 abuts against the second end 340, the linkage mechanism 400 is limited and cannot continue to move. When the inner telescopic tube 210 continues to slide toward the first end 320, the limiting post 232 slides in the second limiting groove 421, and the second link 420 slides relative to the second end seat 230, so that the linkage mechanism 400 can move with the inner telescopic tube 210, and after the movement is limited, the inner telescopic tube 210 is allowed to continue to slide. In addition, during the movement of the linkage mechanism 400 following the inner telescopic tube 210, the foot pedal 100 remains folded or unfolded and does not rotate. When the linkage mechanism 400 is limited by the third limiting part 330 or the first end 320, and the inner telescopic tube 210 continues to slide, the foot pedal 100 is pulled by the pull rod mechanism and rotates relative to the first end seat 220 as it moves with the inner telescopic tube 210.

[0061] The second link 420 includes a plug portion 422 and a connecting portion 223. The connecting portion 223 is connected to one end of the plug portion 422 and protrudes radially from the surface of the plug portion 422. The connecting portion 223 is rotatably connected to the first link 410 via a limiting shaft 430. The plug portion 422 is inserted into the guide channel 231 of the second end seat 230. When the foot pedal 100 is locked in the unfolded state, the second link 420 abuts against the first end 320, the connecting portion 223 abuts against the second end seat 230, and the limiting post 232 abuts against the groove wall of the second limiting groove 421. The above structures combine to limit the position, so that the second link 420 and the inner telescopic tube 210 remain in a stable position when they are in the locked state.

[0062] In one embodiment, the joint locking mechanism 500 further includes a mounting base 520 and a linkage head 530. The mounting base 520 is connected to the first end seat 220. Part of the linkage head 530 is located inside the mounting base 520. The first connecting rod 410 passes through the mounting base 520 and extends to the outside of the first end seat 220 to connect with the foot pedal 100. The linkage head 530 is rotatably connected to the mounting base 520 and is drively connected to the locking head 510. When the linkage head 530 rotates relative to the mounting base 520, it can drive the linkage head 530 to move. One end of the linkage head 530 passes through the first end seat 220 and protrudes to the outside of the inner telescopic tube 210. When the joint locking mechanism 500 moves with the inner telescopic tube 210 relative to the outer telescopic tube 310 to the preset position of the outer telescopic tube 310, the part of the linkage head 530 protruding to the outside of the inner telescopic tube is pushed. The linkage head 530 rotates relative to the mounting base 520 and drives the locking head 510 to move, thereby realizing the locking head 510 locking or unlocking the foot pedal 100.

[0063] Specifically, the outer telescopic assembly 300 also includes a second end 340, which is connected to the end of the outer telescopic tube 310 away from the first end 320. The second end 340 is used to push the linkage head 530 and cause the linkage head 530 to rotate. Specifically, when the mounting base 520 slides outward from the inner telescopic tube 210 toward the outer telescopic tube 310 and moves to a preset position, the second end 340 triggers the linkage head 530 and pushes the linkage head 530 to rotate. The linkage head 530 retracts into the first end base 220, releasing the lock on the foot pedal 100, and the foot pedal 100 switches from a folded state to an unfolded state. When the mounting base 520 slides inward from the inner telescopic tube 210 toward the inner telescopic tube 310 and moves to a preset position, the second end 340 triggers the linkage head 530 and pushes the linkage head 530 to rotate. The linkage head 530 retracts into the first end base 220, releasing the lock on the foot pedal 100, and the foot pedal 100 switches from an unfolded state to a folded state.

[0064] Reference Figure 9The joint locking mechanism 500 also includes an elastic element 540, which, after the second end 340 releases its push on the linkage head 530, drives the locking head 510 to extend to the outside of the first end seat 220 by elastic force. In one embodiment, the elastic element 540 is a torsion spring, with the locking head 510 rotatably connected to the linkage head 530, and the elastic element 540 connected at the rotatable connection position between the locking head 510 and the linkage head 530; when the linkage head 530 is pushed and rotated by the second end 340, the torsion spring accumulates elastic force, and the locking head 510 is pulled back to the inside of the first end seat 220 by the linkage head 530; when the second end seat 230 releases its push on the linkage head 530, the elastic force of the elastic element 540 is released, and the locking head 510 is driven to extend back to the outside of the first end seat 220. In another embodiment, the joint locking mechanism 500 further includes an elastic element 540 and a linkage cable 550. The elastic element 540 is configured as a tension spring. The two ends of the linkage cable 550 are respectively connected to the locking head 510 and the linkage head 530. One end of the elastic element 540 abuts against the locking head 510, and the other end abuts against the mounting base 520. The locking head 510 is slidably connected inside the mounting base 520. When the linkage head 530 is pushed by the second end 340 and rotates, the linkage head 530 pulls the locking head 510 to move through the linkage cable 550, causing the locking head 510 to retract into the first end seat 220. The elastic element 540 is compressed and accumulates elasticity. When the second end 340 releases the push on the linkage head 530, the elastic element 540 releases the elastic force and pushes the locking head 510 to extend out of the first end seat 220 again.

[0065] In some embodiments, the second end 340 includes two limiting protrusions, which are spaced apart along the sliding direction of the inner telescopic tube 210. The limiting protrusions are located inside the outer telescopic tube 310 and protrude relative to the inner wall of the outer telescopic tube 310. When the joint lock mechanism 500 moves the button to the limiting protrusion, the limiting protrusion pushes the linkage head 530 to rotate, thereby unlocking the foot pedal 100. The two limiting protrusions are used to push the linkage head 530 to unlock the foot pedal 100 when the foot pedal 100 switches from a folded state to an unfolded state and when the foot pedal 100 switches from an unfolded state to a folded state.

[0066] In another embodiment, at least a portion of the second end 340 is located inside the outer telescopic tube 310, and the inner diameter of the second end 340 is smaller than the inner diameter of the outer telescopic tube 310. Therefore, the second end 340 protrudes relative to the inner wall of the outer telescopic tube 310. When the foot pedal 100 is in the folded state, the linkage head 530 is pressed by the second end 340, and the locking head 510 is in a retracted state. When the inner telescopic tube 210 moves toward the outside of the outer telescopic tube 310, the linkage head 530 continues to be pressed by the second end 340. When the linkage head 530 moves to the outside of the second end 340, the pressing of the second end 340 on the linkage head 530 is released, the locking head 510 extends, and after the foot pedal 100 is rotated to unfold, the locking head 510 locks the foot pedal 100. When the pedal 100 is in the extended state, the linkage head 530 is located outside the second end 340 and is not pressed by the second end 340. At this time, the locking head 510 continuously locks the pedal 100. When the inner telescopic tube 210 moves towards the inside of the outer telescopic tube 310 and moves until the linkage head 530 contacts the second end 340, the second end 340 presses down on the linkage head 530, the locking head 510 retracts, and the locking head 510 releases the lock on the pedal 100.

[0067] The second end 340 is integrally connected to the outer telescopic tube 310, and the two are integrally formed structures; or, the second end 340 can be detachably connected to the outer telescopic tube 310. For example, the second end 340 is provided with a limiting protrusion on its outside, and the tube wall of the outer telescopic tube 310 is provided with a limiting hole. The limiting protrusion is inserted into the limiting hole in the radial direction of the outer telescopic tube 310 to realize the connection between the second end 340 and the outer telescopic tube 310 and keep their positions relatively stable.

[0068] Furthermore, such as Figure 9As shown, the foot pedal 100 is provided with a limiting groove 110, which includes an arc-shaped groove wall and a flat groove wall. The end of the locking head 510 has a limiting arc surface 511 and a limiting plane 512. Taking the direction of rotation of the foot pedal 100 from the folded state to the unfolded state as a reference, the arc-shaped groove wall 111 is located behind the flat groove wall 112, and the limiting arc surface 511 is located behind the limiting plane 512. When the foot pedal 100 is rotated from the folded state to the unfolded state, the linkage head 530 is no longer pressed by the second end seat 230, and the locking head 510 is in the extended state. The arc groove wall 111 and the limiting arc surface 511 first come into contact. Through the mutual guidance of the two, the locking head 510 is smoothly inserted into the limiting groove 110, thereby locking the foot pedal 100. Furthermore, the sliding direction of the locking head 510 is the same as the extension direction of the inner telescopic tube 210 and the outer telescopic tube 310. When the locking head 510 locks the foot pedal 100, the foot pedal 100 is just in the unfolded state. At this time, the arc groove wall 111 abuts against the limiting arc surface 511, and the limiting plane 512 abuts against the plane groove wall 112, so that the foot pedal 100 is stably kept in the unfolded state.

[0069] The first connecting rod 410 and the locking head 510 are radially spaced along the inner telescopic tube 210 and both pass through the first end seat 220, as shown below. Figure 8 As shown, the foot pedal 100 is also provided with a insertion slot 120 for the first connecting rod 410 to be inserted. One end of the first connecting rod 410 is inserted into the insertion slot 120 and rotatably connected to the foot pedal 100. The limiting groove 110 and the insertion slot 120 are arranged radially at intervals along the inner telescopic tube 210. By providing the insertion slot 120, the foot pedal 100 is prevented from having a protruding structure on the outside, so that the outer wall of the part of the foot pedal 100 located in the mounting groove 222 fits against the groove wall of the mounting groove 222, making the shape of the push-pull retractable foot pedal more concise after it is fully extended.

[0070] It should be noted that, in one embodiment of the present invention, the second end 340 serves to limit and trigger both the linkage mechanism 400 and the joint locking mechanism 500. The length of the limiting shaft 430 is greater than the inner diameter of the second end 340. Therefore, when the linkage mechanism 400 moves with the inner telescopic tube 210 toward the outside of the outer telescopic tube 310, and the limiting shaft 430 moves to the second end 340, the limiting shaft 430 abuts against the end face of the second end 340. At this time, the linkage mechanism 400 is limited and cannot continue to move with the inner telescopic tube 210. The end of the second end 340 is the third limiting part 330.

[0071] like Figure 4 and Figure 6As shown, the position locking mechanism 600 includes a telescopic head 610 and a retaining member 620. The retaining member 620 is elastic. The telescopic head 610 is slidably connected to the inside of the second end seat 230 along the radial direction of the inner telescopic tube 210. Under the action of the elastic force of the retaining member 620, the telescopic head 610 can extend to the outside of the inner telescopic tube 210 and lock at the first limiting part 311 or the second limiting part 312, or retract to the inside of the second end seat 230 and release the lock between it and the first limiting part 311 or the second limiting part 312. Specifically, when the foot pedal 100 is in the folded state, the telescopic head 610 is locked to the first limiting part 311; when the foot pedal 100 is in the unfolded state, the telescopic head 610 is locked to the second limiting part 312. To switch the foot pedal 100 from the folded to the unfolded state, the inner telescopic component 200 is pulled outward, and the second end seat 230 slides along with the inner telescopic tube 210. At this time, the telescopic head 610 is released from the locking of the first limiting part 311. When the inner telescopic tube 210 moves to the unfolded state of the foot pedal 100... When the foot pedal 100 is in the unfolded state, the telescopic head 610 moves to the second limiting part 312 and is locked by the second limiting part 312. When the foot pedal 100 needs to be switched from unfolded to folded state, the inner telescopic component 200 is pushed inward, and the second end seat 230 slides with the inner telescopic tube 210. At this time, the telescopic head 610 is released from the lock of the second limiting part 312. When the inner telescopic tube 210 moves to the foot pedal 100 in the folded state, the telescopic head 610 moves to the first limiting part 311 and is locked by the first limiting part 311.

[0072] The first limiting part 311 and the second limiting part 312 can be through holes or recesses provided on the outer telescopic tube 310. The telescopic head 610 is restricted to move only radially along the inner telescopic tube 210. The telescopic head 610 extends to the outside of the inner telescopic tube 210. The telescopic head 610 is limited when it is inserted into the first limiting part 311 or the second limiting part 312. The telescopic head 610 is released when it is disengaged from the first limiting part 311 or the second limiting part 312.

[0073] The specific motion flow of each mechanism in the push-pull retractable foot pedal of this invention is as follows:

[0074] With one end of the foot pedal 100 as the front end and the end away from the foot pedal 100 as the rear end, the process of switching the foot pedal 100 from the folded state to the unfolded state is as follows: when the foot pedal 100 is in the folded state, the second end seat 230 and the second connecting rod 420 abut against the first end 320, the limiting shaft 430 is located at the front end of the first limiting groove 211, the limiting post 232 is located at the rear end of the second limiting groove 421, the linkage head 530 is pressed against the second end 340, the locking head 510 retracts, and the telescopic head 610 is limited to the first limiting part 311. Pulling the operating lever 700 forward causes the inner telescopic component 200 to slide relative to the outer telescopic component 300. The forward pulling force overcomes the resistance of the first limiting part 311 to the telescopic head 610, causing the inner telescopic component 200, the linkage mechanism 400, the position locking mechanism 600, and the joint locking mechanism 500 to move synchronously toward the outside of the outer telescopic tube 310. When the linkage head 530 moves to the outside of the outer telescopic tube 310 and is released from the pressure of the second end head 340, the linkage head 530 extends to the outside of the inner telescopic tube 210, and the locking head 510 extends to the outside of the first end seat 220 and inserts into the mounting groove 222. Continuing to pull the inner telescopic component 200 causes the joint locking mechanism 500 to move to the second end head 340, and the limiting shaft 430 is subjected to the second end head 340. The movement stops upon contact with the 0; the inner telescopic component 200 is pulled further, the linkage mechanism 400 stops moving, the inner telescopic tube 210 continues to move forward, the limiting shaft 430 moves behind the first limiting groove 211 relative to the inner telescopic tube 210, the limiting post 232 moves in front of the second limiting groove 421 relative to the second link 420, and the second link 420 gradually extends to the outside of the second end seat 230; as the inner telescopic tube 210 gradually moves, the foot pedal 100 rotates to the unfolded state as it moves with the first end 320, pulled by the linkage mechanism 400, and the locking head 510 is inserted into the limiting groove 110 to lock the foot pedal 100, and the telescopic head 610 moves synchronously to the second limiting part 312, and the inner telescopic component 200 is also locked synchronously.

[0075] The process of switching the pedal 100 from the unfolded state to the folded state is as follows: When the pedal 100 is in the unfolded state, the limiting shaft 430 is located at the rear end of the first limiting groove 211, the limiting post 232 is located at the front end of the second limiting groove 421, the linkage head 530 disengages from the second end head 340, the locking head 510 extends and locks the pedal 100, and the telescopic head 610 is limited to the second limiting part 312. Pushing the operating lever 700 backward causes the inner telescopic assembly 200 to slide relative to the outer telescopic assembly 300. The backward thrust overcomes the resistance of the second limiting part 312 on the telescopic head 610, causing the inner telescopic assembly 200, the linkage mechanism 400, the position locking mechanism 600, and the joint locking mechanism 500 to move synchronously toward the interior of the outer telescopic tube 310. When the linkage head 530 moves to the outer telescopic tube 310 and enters the second end 340, the linkage head 530 is pressed by the second end 340. The linkage head 530 rotates relative to the mounting base 520 and drives the locking head 510 to retract, releasing the locking head 510 from the foot pedal 100. Continue pushing the inner telescopic assembly... Part 200, the second link 420 abuts against the first end 320, the linkage mechanism 400 no longer moves, the inner telescopic tube 210 continues to move backward, the limiting shaft 430 moves in front of the first limiting groove 211 relative to the inner telescopic tube 210, the limiting post 232 moves behind the second limiting groove 421 relative to the second link 420, and the second end seat 230 moves to the rear end of the second link 420; as the inner telescopic tube 210 gradually moves, the foot pedal 100 follows the movement of the first end 320 and is pushed by the linkage mechanism 400 to rotate to the folded state, the telescopic head 610 moves synchronously to the first limiting part 311, and the position of the inner telescopic component 200 is locked.

[0076] It should be noted that during the unfolding and folding process of the foot pedal 100, there is no need to stop at any point of movement, the pushing and pulling process of the control lever 700 is smooth, and the unfolding and folding efficiency of the foot pedal 100 is high.

[0077] The present invention also provides a seat, which includes the aforementioned push-pull retractable footrest and a seat body. An outer telescopic component 300 is installed on the seat body. When the push-pull operating lever 700 is used, the inner telescopic component 200 slides relative to the outer telescopic component 300, thereby causing the footrest 100 to retract.

[0078] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A push-pull retractable foot pedal, characterized in that: include: Foot pedal; An external telescopic assembly includes an external telescopic tube and a first end, the first end being connected to one end of the external telescopic tube, and the external telescopic tube having a first limiting portion, a second limiting portion, and a third limiting portion spaced apart. The inner telescopic assembly includes an inner telescopic tube, a first end seat, and a second end seat. The first end seat and the second end seat are respectively connected to both ends of the inner telescopic tube. The second end seat and part of the inner telescopic tube are housed inside the outer telescopic tube and are slidably connected to the outer telescopic tube. The first end seat is located outside the outer telescopic tube. The foot pedal is rotatably connected to the first end seat. A linkage mechanism has one end rotatably connected to the foot pedal and the other end inserted into the interior of the inner telescopic tube and connected to the second end seat. The rotation axis of the foot pedal relative to the second end seat is spaced apart from the rotation axis of the foot pedal relative to the linkage mechanism. The linkage mechanism can move with the movement of the inner telescopic tube and is limited to the third limiting part. The linkage mechanism includes a first link and a second link rotatably connected. The end of the first link opposite to the second link is rotatably connected to the foot pedal. The second link is slidably connected to the inner telescopic tube. The first end seat has a through moving channel. The first link passes through the moving channel and can swing within the moving channel. The joint locking mechanism includes a locking head that is slidably connected to the first end seat and can extend out of the first end seat to lock the foot pedal as the inner telescopic tube moves, or retract into the first end seat to unlock the foot pedal. A position locking mechanism is connected to the second end seat and can lock itself to the first limiting part and the second limiting part as the second end seat moves.

2. The push-pull retractable foot pedal according to claim 1, characterized in that, The first end seat has a mounting groove at the end facing away from the inner telescopic tube. The mounting groove is connected to the moving channel, and part of the foot pedal is inserted into the mounting groove.

3. The push-pull retractable foot pedal according to claim 1, characterized in that, The linkage mechanism includes a limiting shaft, the first link and the second link are rotatably connected through the limiting shaft, the inner telescopic tube has a first limiting groove extending in the sliding direction, the limiting shaft passes through the first limiting groove and can abut against the groove wall of the first limiting groove.

4. The push-pull retractable foot pedal according to claim 3, characterized in that, The second end seat is provided with a guide channel that extends through the inner telescopic tube in the sliding direction. The second connecting rod passes through the guide channel and has a second limiting groove that extends in the sliding direction of the inner telescopic tube. The second end seat has a limiting post that is slidably connected in the second limiting groove and can abut against the groove wall of the second limiting groove.

5. The push-pull retractable foot pedal according to claim 1, characterized in that, The joint locking mechanism further includes a mounting base and a linkage head. The mounting base is connected to the first end seat. Part of the linkage head is located inside the mounting base. The linkage head is rotatably connected to the mounting base. The locking head is drivenly connected to one end of the linkage head. The other end of the linkage head passes through the first end seat and protrudes to the outside of the inner telescopic tube. The outer telescopic component includes a second end head. The second end head is located at the end of the outer telescopic tube away from the first end head. The linkage head can move to the second end head following the movement of the first end seat, and can be pushed by the second end head to drive the locking head back, or move away from the second end head to extend the locking head.

6. The push-pull retractable foot pedal according to claim 5, characterized in that, At least a portion of the second end is located inside the outer telescopic tube, and the inner diameter of the second end is smaller than the inner diameter of the outer telescopic tube.

7. The push-pull retractable foot pedal according to claim 6, characterized in that, The third limiting part is located at the end of the second end. The linkage mechanism includes a first link, a second link and a limiting shaft. The first link and the second link are rotatably connected through the limiting shaft. The length of the limiting shaft is greater than the inner diameter of the second end. The limiting shaft can move with the inner telescopic tube and abut against the third limiting part.

8. The push-pull retractable foot pedal according to claim 1, characterized in that, The position locking mechanism includes a telescopic head that is radially slidably connected to the interior of the second end seat along the inner telescopic tube. The telescopic head can extend to the outside of the inner telescopic tube to lock onto the first limiting part or the second limiting part, or retract to the interior of the second end seat to release the lock with the first limiting part or the second limiting part.

9. A seat, characterized in that, include: Push-pull retractable foot pedal as claimed in any one of claims 1 to 8; The seat body, wherein the external telescopic tube assembly is mounted on the seat body.

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