Automatic extendable footrest and seat

Abstract

This invention discloses an automatically extendable footrest and seat. The automatically extendable footrest includes a fixed tube, a telescopic tube assembly, a footrest assembly, a functional gear assembly, an unlocking mechanism, and a transmission torsion spring. The telescopic tube assembly includes a telescopic part and a rotating part connected together. The footrest assembly includes a first base, a second base, and a footrest body. The seat includes an automatically extendable footrest. When the telescopic part slides relative to the fixed tube, the unlocking mechanism can be triggered by a limiting boss inside the fixed tube, which drives the functional gear assembly to move. The rotation of the first locking tooth is converted into the movement of the second locking tooth relative to the first base. The limiting post of the second locking tooth can disengage from the first limiting groove, releasing the lock on the rotation of the footrest assembly. The footrest assembly automatically extends under the elastic force of the transmission torsion spring. Therefore, when it is necessary to unfold the footrest body, simply pull the telescopic tube assembly to unfold the footrest relative to the fixed tube, which greatly improves the ease of operation.

Description

Technical Field

[0001] This invention relates to the field of seating technology, and more particularly to an automatically extendable footrest and seat. Background Technology

[0002] Based on the development trend of comfort and intelligence in home furnishing products, the footrests equipped on chairs can support the user's legs and feet, allowing the user to use the chair in different sitting and lying positions to achieve the effect of relaxation and rest. In related technologies, the footrests have two states: unfolded and folded. They can provide a place for the user's legs and feet when in use, and reduce space occupation when not in use. However, the unfolding and folding process of the footrests involves many movements and is cumbersome to operate, which cannot meet the requirement of quick unfolding and folding of the footrests. 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 an automatically extending foot pedal, which can automatically extend and is highly convenient to operate.

[0004] The present invention also proposes a seat having the above-mentioned automatically extending footrest.

[0005] An automatic extendable foot pedal according to a first aspect embodiment of the present invention includes:

[0006] The fixed tube has a limiting boss inside;

[0007] A telescopic tube assembly includes a telescopic part and a rotating part connected together, wherein the telescopic part is slidably connected to the inside of the fixed tube;

[0008] A foot pedal assembly includes a first base, a second base, and a foot pedal body. The foot pedal body is connected to the first base and / or the second base. The rotating part is located between the first base and the second base. The rotating part is rotatably connected to the first base and the rotating part is rotatably connected to the second base.

[0009] The functional gear assembly includes a first locking tooth and a second locking tooth. The first locking tooth is rotatably connected to the interior of the rotating part, and the second locking tooth is slidably connected to the interior of the rotating part. The first locking tooth and the second locking tooth abut against each other along the arrangement direction of the first base and the second base. The second locking tooth has a limiting post, and the first base has a first limiting groove. The limiting post can slide along the first limiting groove to insert into or retract from the first limiting groove.

[0010] The unlocking mechanism includes an unlocking head and a linkage cable. The unlocking head is rotatably connected to the interior of the telescopic part, and a portion of the unlocking head can extend to the exterior of the telescopic part. One end of the linkage cable is connected to the unlocking head, and the other end is connected to the first locking tooth. The unlocking head can slide along with the telescopic part and abut against the limiting protrusion. The linkage cable pulls the first locking tooth to rotate relative to the rotating part, thereby the first locking tooth pushes the second locking tooth to move, so that the limiting post exits the first limiting groove.

[0011] A transmission torsion spring, one end of which is connected to the first base or the second base, and the other end of which is connected to the rotating part, is used to push the foot pedal assembly to rotate relative to the rotating part in order to unfold the foot pedal body.

[0012] The automatic extension foot pedal according to embodiments of the present invention has at least the following beneficial effects:

[0013] The automatic extendable pedal of this invention is linked with a telescopic tube assembly, an unlocking mechanism, a functional gear assembly, and a transmission torsion spring. When the telescopic part slides relative to the fixed tube, the unlocking mechanism can be triggered by the limiting boss inside the fixed tube and drive the functional gear assembly to move. The rotation of the first locking tooth is converted into the movement of the second locking tooth relative to the first base. The limiting post of the second locking tooth can exit the first limiting groove, releasing the lock on the rotation of the pedal assembly. The pedal assembly automatically extends under the elastic force of the transmission torsion spring. Therefore, when the pedal body needs to be unfolded, only the telescopic tube assembly needs to be pulled to unfold the pedal relative to the fixed tube, which is highly convenient to operate.

[0014] According to some embodiments of the present invention, the functional tooth assembly further includes a first elastic element and a locking seat. The two ends of the first elastic element are respectively connected to the locking seat and the second locking tooth. The locking seat has a first locking part and the second base has a second locking part. The locking seat can slide with the second locking tooth so that the first locking part and the second locking part can be inserted into each other when the pedal body is unfolded, and the relative rotation between the pedal assembly and the rotating part is restricted.

[0015] According to some embodiments of the present invention, the functional tooth assembly further includes a second elastic member, the two ends of which are respectively connected to the locking seat and the second base;

[0016] The first base also includes a second limiting groove. The first limiting groove and the second limiting groove are distributed along the circumference of the first base. The first locking part can separate from the second locking part after the linkage releases the tension on the first locking tooth, and the limiting post is inserted into the second limiting groove.

[0017] According to some embodiments of the present invention, the first limiting groove and the second limiting groove are arranged adjacent to each other, and the first base further includes a guide boss. The guide boss has an inclined surface on the side facing the limiting post. The inclined surface gradually approaches the first limiting groove in the direction toward the second locking tooth. The guide boss is located in the second limiting groove. The limiting post can slide in the second limiting groove and abut against the inclined surface so as to be inserted into the first limiting groove after the foot pedal body is closed.

[0018] According to some embodiments of the present invention, the first locking tooth has a first sliding boss and a second sliding boss connected together, the outer diameter of the second sliding boss being larger than the outer diameter of the first sliding boss, the locking seat has a first sliding channel and a second sliding channel communicating with each other, the inner diameter of the second sliding channel being larger than the inner diameter of the first sliding channel, the first sliding boss being slidably connected in the first sliding channel, the second sliding boss being slidably connected in the second sliding channel, and being able to abut against the inner wall of the end of the second sliding channel.

[0019] According to some embodiments of the present invention, the foot pedal assembly further includes a drive shaft, the two ends of which are respectively connected to the first base and the second base. The drive shaft passes through the interior of the first locking tooth, the second locking tooth and the locking seat. A limiting protrusion is provided on the side of the drive shaft, and the limiting protrusion is used to abut against the side of the second locking tooth facing away from the locking seat.

[0020] According to some embodiments of the present invention, the rotating part is provided with a limiting guide rib on the side facing the first base, and the first base is provided with an angle limiting part protruding towards the rotating part. The angle limiting part is inserted into the interior of the rotating part and can abut against the end faces of both ends of the limiting guide rib to limit the rotation angle of the foot pedal assembly.

[0021] According to some embodiments of the present invention, the surface of the telescopic part is provided with a protrusion in the radial direction, the protrusion being able to abut against the limiting boss when the foot pedal body is in the unfolded state.

[0022] According to some embodiments of the present invention, the automatic extendable pedal further includes a position locking mechanism, the position locking mechanism including a locking pin and an elastic abutment, the locking pin being slidably connected to the interior of the telescopic part along the radial direction of the telescopic part and being able to extend to the exterior of the telescopic part, the fixing tube having a first limiting part and a second limiting part, the first limiting part and the second limiting part being arranged at intervals along the extension direction of the fixing tube, the locking pin being able to be inserted into the first limiting part when the pedal body is in a retracted state, and inserted into the second limiting part when the pedal body is in an extended state.

[0023] A seat according to a second aspect embodiment of the present invention includes:

[0024] The automatic extendable foot pedal of the first aspect embodiment;

[0025] The seat body, and the fixing tube is installed on the seat body.

[0026] 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

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0028] Figure 1 This is a schematic diagram of the automatic extension foot pedal of the present invention in one usage state;

[0029] Figure 2 This is a schematic diagram illustrating another usage state of the automatically extending foot pedal of the present invention;

[0030] Figure 3 for Figure 1 Cross-sectional view of the automatic extendable foot pedal;

[0031] Figure 4 for Figure 1 An explosion diagram of the automatic extendable foot pedal;

[0032] Figure 5 This is a sectional view of the functional gear assembly and the rotating part;

[0033] Figure 6 This is a cross-sectional view of the functional gear assembly and the rotating part from another direction;

[0034] Figure 7 A schematic diagram of one embodiment of the first locking tooth;

[0035] Figure 8 A schematic diagram of one embodiment of the first base;

[0036] Figure 9 This is a schematic diagram of one embodiment of the rotating part.

[0037] Figure label:

[0038] Fixed tube 100, limiting boss 110, outer tube 120, end seat 130, first limiting part 140, second limiting part 150;

[0039] Telescopic tube assembly 200, telescopic part 210, protrusion 211, rotating part 220, limiting guide rib 221;

[0040] The pedal assembly 300 includes a first base 310, a first limiting groove 311, a second limiting groove 312, a guide boss 313, an angle limiting part 314, a second base 320, a second locking part 321, a pedal body 330, a drive shaft 340, and a limiting protrusion 341.

[0041] Functional gear assembly 400, first locking tooth 410, tooth portion 411, second locking tooth 420, limiting post 421, guide groove 422, first sliding boss 423, second sliding boss 424, first elastic element 430, locking seat 440, first locking portion 441, first sliding channel 442, second sliding channel 443, second elastic element 450;

[0042] Unlocking mechanism 500, unlocking head 510, linkage cable 520;

[0043] Transmission torsion spring 600;

[0044] Position locking mechanism 700, locking pin 710, flexible support component 720. 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 "set up," "install," and "connect" 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] Reference Figures 1 to 4 An embodiment of the present invention provides an automatically extending foot pedal, which includes a fixed tube 100, a telescopic tube assembly 200, a foot pedal assembly 300, a functional gear assembly 400, an unlocking mechanism 500, and a transmission torsion spring 600. The telescopic tube assembly 200 includes a telescopic part 210 and a rotating part 220 connected together. The telescopic part 210 is slidably connected to the inside of the fixed tube 100. The foot pedal assembly 300 includes a first base 310, a second base 320, and a foot pedal body 330. The foot pedal body 330 and the first base 310 are connected together. 10. The foot pedal body 330 is connected to the second base 320. The rotating part 220 is located between the first base 310 and the second base 320. The rotating part 220 is rotatably connected to the first base 310 and the second base 320. When the foot pedal body 330 rotates, the first base 310 and the second base 320 rotate synchronously relative to the rotating part 220. At this time, the angle of the foot pedal body 330 relative to the fixed tube 100 changes, thereby enabling the foot pedal body 330 to unfold or retract. Figure 1 This is a schematic diagram showing the foot pedal body 330 in the retracted state. Figure 2 This is a schematic diagram of the foot pedal body 330 in its unfolded state.

[0051] Combination Figures 4 to 6The functional gear assembly 400 includes a first locking tooth 410 and a second locking tooth 420. The first locking tooth 410 is rotatably connected to the interior of the rotating part 220, and the second locking tooth 420 is slidably connected to the interior of the rotating part 220. The first locking tooth 410 and the second locking tooth 420 abut against each other along the arrangement direction of the first base 310 and the second base 320, and the two can slide relative to each other. The second locking tooth 420 has a limiting post 421. The first base 310 has a first limiting groove 311 on the side facing the second base 320. The limiting post 421 can be inserted into the first limiting groove 311. When the second locking tooth 420 moves relative to the first locking tooth 410, the limiting post 421 slides along the first limiting groove 311 and can be inserted into or removed from the first limiting groove 311. When the limiting post 421 is inserted into the first limiting groove 311, the groove wall of the first limiting groove 311 limits the limiting post 421 in the circumferential direction. At this time, the first base 310 is in a locked state. The first base 310 and the second base 320 cannot rotate relative to the rotating part 220, and the foot pedal body 330 cannot be retracted. When the limiting post 421 is removed from the first limiting groove 311, the locking of the limiting post 421 is released, and the first base 310 and the second base 320 can rotate relative to the rotating part 220, and the foot pedal body 330 can be retracted.

[0052] The unlocking mechanism 500 includes an unlocking head 510 and a linkage cable 520. The unlocking head 510 is rotatably connected to the inside of the telescopic part 210, and a portion of the unlocking head 510 can extend to the outside of the telescopic part 210. One end of the linkage cable 520 is connected to the unlocking head 510, and the other end is connected to the first locking tooth 410. The fixed tube 100 is provided with a limiting boss 110 inside, and the unlocking head 510 can abut against the limiting boss 110 as the telescopic part 210 slides. When the telescopic part 210 slides relative to the fixed tube 100, the unlocking head 510 follows the telescopic part 210. 10. When the unlocking head 510 moves to the limiting boss 110, the unlocking head 510 abuts against the limiting boss 110. The unlocking head 510 rotates relative to the telescopic part 210 due to the abutment of the limiting boss 110. Then, the linkage cable 520 pulls the first locking tooth 410 to rotate in the rotating part 220. The second locking tooth 420 is pushed away from the first locking tooth 410 by the first locking tooth 410, and the component moves away from the first base 310. When the limiting post 421 exits from the first limiting groove 311, the first base 310 is unlocked and can rotate relative to the rotating part 220.

[0053] Furthermore, the transmission torsion spring 600 provides elastic force for the rotation of the first base 310 and the second base 320. The transmission torsion spring 600 is connected to either the first base 310 or the second base 320. Taking the transmission torsion spring 600 connected to the first base 310 as an example, part of the transmission torsion spring 600 is located inside the first base 310. One end of the transmission torsion spring 600 is connected to the first base 310, and the other end is connected to the rotating part 220. When the pedal body 330 is in the retracted state, the transmission torsion spring 600 accumulates elastic force. When the locking of the first base 310 is released, the transmission torsion spring 600 releases the elastic force, pushing the first base 310 to rotate relative to the rotating part 220. The second base 320 and the pedal body 330 rotate synchronously with the first base 310, so that the pedal body 330 unfolds. Similarly, when the transmission torsion spring 600 is connected to the second base 320, the transmission torsion spring 600 pushes the second base 320 to rotate, so that the first base 310 and the pedal body 330 rotate synchronously with the second base 320, and the pedal body 330 unfolds.

[0054] Therefore, in this invention, the automatic extendable pedal, telescopic tube assembly 200, unlocking mechanism 500, functional gear assembly 400, and transmission torsion spring 600 are linked. When the telescopic part 210 slides relative to the fixed tube 100, the unlocking mechanism 500 can be triggered by the limiting boss 110 inside the fixed tube 100 and drive the functional gear assembly 400 to move. The rotation of the first locking tooth 410 is converted into the movement of the second locking tooth 420 relative to the first base 310. The limiting post 421 of the second locking tooth 420 can exit the first limiting groove 311, releasing the lock on the rotation of the pedal assembly 300. The pedal assembly 300 automatically extends under the elastic push of the transmission torsion spring 600. Thus, when the pedal body 330 needs to be unfolded, only the telescopic tube assembly 200 needs to be pulled to unfold the pedal relative to the fixed tube 100, which is highly convenient to operate.

[0055] In one embodiment, such as Figure 7 As shown, the first locking tooth 410 is located on the side of the second locking tooth 420 facing the first base 310. The first locking tooth 410 has a tooth portion 411 protruding towards the second locking tooth 420, and the tooth portion 411 has an inclined guide surface. The side of the second locking tooth 420 facing the first locking tooth 410 has a guide groove 422, and the guide groove 422 has an inclined groove wall. The tooth portion 411 is inserted into the guide groove 422. The guide surface of the tooth portion 411 abuts against the groove wall of the guide groove 422. When the first locking tooth 410 rotates, the tooth portion 411 slides relative to the groove wall of the guide groove 422 and pushes the second locking tooth 420 gradually away from the first base 310, realizing the switching from the rotation of the first locking tooth 410 to the movement of the second locking tooth 420, and enabling the limiting post 421 to be inserted into or removed from the first limiting groove 311.

[0056] In this embodiment, taking the transmission torsion spring 600 located within the first base 310 as an example, the second base 320 is also provided with a limiting structure for limiting the functional gear assembly 400, so as to lock the position of the pedal assembly 300 when the pedal body 330 is in the unfolded state. Specifically, the functional gear assembly 400 also includes a first elastic member 430 and a locking seat 440. The two ends of the first elastic member 430 are respectively connected to the locking seat 440 and the second locking tooth 420. The locking seat 440 has a first locking part 441, and the second base 320 has a second locking part 321. When the second locking tooth 420 moves away from the first base 310, and the limiting post 421 exits the first limiting groove 311, the two ends of the first elastic member 430 are respectively resisted by the first locking tooth 410 and the locking seat 440 and retract. When the first base 310 and the second base 320 move away from the first base 310, the first elastic member 430 retracts due to the resistance of the first locking tooth 410 and the locking seat 440. Driven by the transmission torsion spring 600, the relative rotating part 220 rotates, and after the foot pedal body 330 is fully extended, the first locking part 441 and the second locking part 321 are aligned in the arrangement direction of the first base 310 and the second base 320. Under the elastic force of the first elastic member 430, the locking seat 440 slides in the rotating part 220, and the first locking part 441 and the second locking part 321 are inserted into each other. The first locking part 441 and the second locking part 321 limit each other in the circumferential direction. At this time, the rotation of the second base 320 is restricted, and the foot pedal body 330 is locked in the extended state.

[0057] Furthermore, the first locking part 441 and the second locking part 321 are provided with a hole-shaft mating structure, or a protrusion-groove mating structure. For example, the first locking part 441 is provided with a groove, and the second locking part 321 is provided with a protrusion. After the first locking part 441 and the second locking part 321 are aligned, the protrusion can be inserted into the groove to achieve circumferential limiting of the first locking part 441 and the second locking part 321.

[0058] When the foot pedal body 330 is in the retracted state, it is usually located under the seat chassis. In order to avoid interference between the foot pedal body 330 and the components under the seat chassis, in one embodiment of the present invention, the retraction angle of the foot pedal body 330 is set to 120°. When the foot pedal body 330 is fully extended, it is flush with the fixing tube 100 and is in a horizontal state. When the foot pedal body 330 is retracted, it forms a 60-degree angle with the fixing tube 100. The space between the foot pedal body 330 and the fixing tube 100 can be used to install other components under the seat chassis. Based on this, in one embodiment of the present invention, three first locking parts 441 and three second locking parts 321 are provided. The three first locking parts 441 are evenly distributed along the circumference of the locking seat 440, and the three second locking parts 321 are evenly distributed along the circumference of the second base 320. Therefore, the included angle between adjacent first locking parts 441 and adjacent second locking parts 321 is 120°. In this way, each time the foot pedal body 330 is unfolded, the first locking parts 441 and the second locking parts 321 can be aligned and interlocked. It can be understood that when the foot pedal body 330 is set to other retraction angles, the number and arrangement of the first locking parts 441 and the second locking parts 321 can be adapted. For example, when the retraction angle is 90°, four first locking parts 441 and four second locking parts 321 are provided.

[0059] In one embodiment of the present invention, the functional tooth assembly 400 further includes a second elastic member 450. The two ends of the second elastic member 450 are respectively connected to the locking seat 440 and the second base 320. The first elastic member 430 and the second elastic member 450 are located on opposite sides of the locking tooth. The first elastic member 430 is used to push the locking seat 440 toward the second base 320 after the first locking part 441 and the second locking part 321 are matched, so as to realize the circumferential locking of the locking seat 440 onto the second base 320. The second elastic member 450 is used to push the locking seat 440 away from the second base 320 after the linkage cable 520 releases the tension on the first locking tooth 410, so as to separate the first locking part 441 and the second locking part 321 from each other, thereby unlocking the foot pedal assembly 300 and facilitating the foot pedal assembly 300 to be retracted after being unfolded.

[0060] Specifically, such as Figure 8As shown, the first base 310 also includes a second limiting groove 312, and the first limiting groove 311 and the second limiting groove 312 are distributed circumferentially along the first base 310. When the second locking tooth 420 moves away from the first base 310 under the push of the first locking tooth 410, the limiting post 421 exits from the first limiting groove 311, and the second locking tooth 420 separates from the first base 310. During this process, the first elastic member 430 is compressed. When the first base 310 and the second base 320 rotate relative to the rotating part 220 under the push of the transmission torsion spring 600, the limiting post 421 is no longer aligned with the first limiting groove 311, but faces the second limiting groove 312. During this process, the first base 310 and the second locking tooth 420 remain separated, and the elastic force of the first elastic member 430 is maintained. Release and lock the first locking part 441 and the second locking part 321 into each other, compressing the second elastic member 450; when the linkage cable 520 releases the tension on the first locking tooth 410, the second locking tooth 420 is no longer supported by the first locking tooth 410, the elastic force of the second elastic member 450 is released, the second locking tooth 420 moves toward the first base 310, and the limiting post 421 is inserted into the second limiting groove 312, the first locking part 441 and the second locking part 321 separate from each other and are unlocked, at which time the first base 310 and the second base 320 can rotate relative to the rotating part 220.

[0061] It should be noted that the distance of the first limiting groove 311 in the circumferential direction of the first base 310 matches the length of the limiting post 421 in the circumferential direction of the first base 310. After the limiting post 421 is inserted into the first limiting groove 311, it is limited in the circumferential direction by the groove wall of the first limiting groove 311. The distance of the second limiting groove 312 in the circumferential direction of the first base 310 satisfies the sliding distance of the limiting post 421 in the second limiting groove 312 when the first base 310 rotates relative to the first locking tooth 410. That is, the included angle between the groove walls at both ends of the second limiting groove 312 is greater than the extension / retraction angle of the foot pedal body 330.

[0062] The first limiting groove 311 and the second limiting groove 312 are arranged adjacent to each other. The first base 310 also includes a guide boss 313. The guide boss 313 has an inclined surface on the side facing the limiting post 421. This inclined surface gradually approaches the first limiting groove 311 in the direction towards the second locking tooth 420. The inclined surface is used to guide the limiting post 421 as it moves from the second limiting groove 312 into the first limiting groove 311. When the first locking part 441 and the second locking part 321 separate from each other, and the limiting post 421 is inserted into the second limiting groove 312, the first base 310 and the second base 320 can rotate simultaneously relative to the rotating part 220. At this time, by turning the foot pedal body 330, the foot pedal body 330 drives the first base 310 and the second base 320 to rotate relative to the rotating part 220, and the limiting post 421 moves along the extension direction of the second limiting groove 312. During this process, the transmission torsion spring 600 accumulates elastic force. During the movement, the limiting post 421 is guided by the guide boss 313 and gradually moves away from the first base 310, pushing the first locking tooth 410 closer to the locking seat 440, causing the first elastic member 430 to be compressed. When the pedal body 330 is fully retracted, the limiting post 421 moves from the second limiting groove 312 to the first limiting groove 311, the first elastic member 430 releases its elastic force, and pushes the limiting post 421 into the first limiting groove 311, locking the pedal body 330 in the retracted state.

[0063] In addition, such as Figure 6As shown, the second locking tooth 420 has a first sliding boss 423 and a second sliding boss 424 connected together. The outer diameter of the second sliding boss 424 is larger than the outer diameter of the first sliding boss 423. The locking seat 440 has a first sliding channel 442 and a second sliding channel 443 that are interconnected. The inner diameter of the second sliding channel 443 is larger than the inner diameter of the first sliding channel 442. The second sliding boss 424 is slidably connected in the second sliding channel 443, and the first sliding boss 423 is slidably connected in the first sliding channel 442. During the rotation of the foot pedal body 330 from the retracted state to the extended state, because the first locking part 441 and the second locking part 321 are not aligned during this process, the locking seat 440 is always supported by the second base 320. When the second locking tooth 420 moves away from the first base 310 under the push of the first locking tooth 410, the first locking tooth 410 moves relative to the locking seat 440. At this time, the first sliding channel 442 guides the sliding of the first sliding boss 423, and the second sliding channel 443 guides the sliding of the second sliding boss 424; in the linkage 520 releases the tension on the first locking tooth 410, and the first elastic member 430 releases the elastic force to make the first locking tooth 410 move toward the first base 310. When the limiting post 421 is inserted into the second limiting groove 312, the second sliding boss 424 abuts against the inner wall of the end of the second sliding channel 443, limiting the sliding distance of the second locking tooth 420, and preventing the limiting post 421 from being inserted too deeply into the second limiting groove 312, so that the limiting post 421 cannot enter the first limiting groove 311 after the pedal body 330 is fully closed, thus affecting the position locking of the pedal assembly 300. In addition, under the mutual abutment of the second sliding boss 424 and the locking seat 440, the locking seat 440 can be completely accommodated inside the rotating part 220, and the first locking part 441 and the second locking part 321 are completely separated, ensuring that the second base 320 can rotate relative to the rotating part 220 after the linkage cable 520 releases the tension on the first locking tooth 410, so that the foot pedal assembly 300 can be retracted.

[0064] It should be noted that the second sliding boss 424 can be interconnected with the first sliding boss 423 by locking a threaded fastener into it. The nut of the threaded fastener serves as the second sliding boss 424, facilitating the assembly of the locking seat 440 and the second locking tooth 420. The outer diameters of the first sliding boss 423 and the second sliding boss 424 refer to their maximum radial lengths, and the inner diameters of the first sliding channel 442 and the second sliding channel 443 refer to their maximum radial lengths. For example, when the first sliding boss 423 and the second sliding boss 424 are cylindrical, the outer diameter is their diameter; when the first sliding boss 423 and the second sliding boss 424 are tetrahedral, the outer diameter is their length or width.

[0065] In one embodiment, the unlocking mechanism 500 further includes a third elastic element, which may be a torsion spring connected to the rotational connection between the unlocking head 510 and the telescopic part 210. The torsion spring is used to release the elastic force after the limiting boss 110 releases its pressure on the unlocking head 510, causing the unlocking head 510 to return to its initial state. Specifically, when the unlocking head 510 contacts the limiting boss 110, the limiting boss 110 pushes the unlocking head 510 to rotate away from the foot pedal body 330, and the unlocking head 510 pulls the linkage cable 520, causing the third elastic element to accumulate elastic force. When the unlocking head 510 disengages from the limiting boss 110, the elastic force of the third elastic element is released, and the unlocking head 510 rotates towards the foot pedal body 330.

[0066] The pedal assembly 300 also includes a drive shaft 340, with its two ends connected to a first base 310 and a second base 320, respectively. The drive shaft 340 passes through the interior of a first locking tooth 410, a second locking tooth 420, and a locking seat 440. When the first base 310 and the second base 320 rotate relative to the rotating part 220, the drive shaft 340 rotates synchronously relative to the first locking tooth 410, the second locking tooth 420, and the locking seat 440. A limiting protrusion 341 is provided on the side of the drive shaft 340. The limiting protrusion 341 is used to abut against the side of the second locking tooth 420 facing away from the locking seat 440. In this way, the limiting protrusion 341 can limit the insertion depth of the limiting post 421 into the first base 310, preventing the limiting post 421 from being inserted too deeply and affecting the unlocking and locking actions of the pedal assembly 300.

[0067] like Figure 8 and Figure 9 As shown, the rotating part 220 has a limiting guide rib 221 on the side facing the first base 310. The first base 310 has an angle limiting part 314 protruding towards the rotating part 220. The angle limiting part 314 is inserted into the interior of the rotating part 220. The limiting guide rib 221 is used to limit the movement range of the angle limiting part 314. When the foot pedal assembly 300 is retracted, the first base 310 and the second base 320 rotate relative to the rotating part 220. The angle limiting part 314 moves synchronously within the rotating part 220. When the angle limiting part 314 abuts against the end of the limiting guide rib 221, the foot pedal body 330 is fully extended or fully retracted. The range of motion of the angle limiting part 314 matches the insertion and separation actions of the first locking part 441 and the second locking part 321, and adapts to the extension and retraction angle of the pedal assembly 300. That is, when the angle limiting part 314 is limited by the limiting guide 221 through movement, the first locking part 441 is just aligned with the second locking part 321 by rotating the corresponding angle. At this time, the pedal body 330 is in a fully extended or fully retracted state.

[0068] In addition, embodiments of the present invention also include limiting measures to restrict the movement position of the telescopic tube assembly 200. Specifically, as follows: Figure 4 As shown, the surface of the telescopic part 210 has a protrusion 211 that protrudes radially. This protrusion 211 can abut against the limiting boss 110 when the pedal body 330 is in the unfolded state. The limiting boss 110 restricts the movement distance of the telescopic part 210, preventing the telescopic part 210 from detaching from the fixing tube 100. Furthermore, the limiting boss 110 also serves as both the trigger unlocking head 510 and the limiting protrusion 211, eliminating the need for additional auxiliary structures and effectively simplifying the structure of the automatically produced pedal.

[0069] Understandably, the fixed tube 100 includes an outer tube 120 and an end seat 130. The end seat 130 is inserted into the interior of the outer tube 120. The end face of the end seat 130 forms a limiting boss 110 for limiting the protrusion 211. Both the end seat 130 and the outer tube 120 adopt a tubular structure, which reduces the processing cost of the fixed tube 100.

[0070] The automatic extendable foot pedal also includes a position locking mechanism 700, which locks the position of the extendable part 210 when it is in an extended state relative to the fixed tube 100 or in a retracted state relative to the fixed tube 100. Specifically, as follows... Figure 3 and Figure 4 As shown, the position locking mechanism 700 includes a locking pin 710 and an elastic abutment 720. The locking pin 710 is slidably connected to the inside of the telescopic part 210 along the radial direction of the telescopic part 210, and can extend to the outside of the telescopic part 210 under the elastic force of the elastic abutment 720. The fixed tube 100 is provided with a first limiting part 140 and a second limiting part 150, which are arranged at intervals along the extension direction of the fixed tube 100. When the telescopic part 210 extends relative to the fixed tube 100, the foot pedal body 330 is in an unfolded state. At this time, the positioning pin is inserted into the second limiting part 150, and the position of the telescopic part 210 is locked. When the telescopic part 210 retracts into the fixed tube 100, the foot pedal body 330 is in a folded state. At this time, the positioning pin is inserted into the first limiting part 140, and the position of the telescopic part 210 is locked.

[0071] The first limiting part 140 and the second limiting part 150 may be a groove provided on the inner wall of the fixing tube 100 or a through hole provided radially in the fixing tube 100.

[0072] The usage process of the automatic extendable foot pedal of the present invention is as follows:

[0073] When the foot pedal body 330 switches from the retracted to the extended state, pulling the telescopic tube assembly 200 outward releases the locking pin 710 from the state locked by the first limiting part 140. The telescopic part 210 moves outward relative to the fixed tube 100. When the unlocking head 510 moves to the limiting boss 110, the unlocking head 510 is triggered and rotates relative to the telescopic part 210. When the telescopic part 210 moves to the point where the locking pin 710 is inserted into the second limiting part 150, the position of the telescopic part 210 is locked, and the protrusion 211 abuts against the limiting boss 110. The unlocking head 510 pulls the first locking tooth 410 to rotate relative to the rotating part 220 through the linkage cable 520. The first locking tooth 410 pushes the second locking tooth 420 away from the first base 310, and the limiting post 421 gradually disengages from the first limiting groove 31. 1. During this process, the first elastic element 430 is compressed; when the limiting post 421 is completely disengaged from the first limiting groove 311, under the push of the transmission torsion spring 600, the first base 310 and the second base 320 rotate relative to the rotating part 220, and the pedal body 330 switches from the folded state to the unfolded state. During this process, the second base 320 abuts against the locking seat 440, and the first locking part 441 and the second locking part 321 are not aligned and are separated from each other; when the pedal body 330 is fully switched to the unfolded state, the first locking part 441 and the second locking part 321 are aligned, the first elastic element 430 releases its elastic force, the first locking part 441 and the second locking part 321 are inserted into each other, and the second elastic element 450 is compressed, thereby locking the pedal body 330 in the unfolded state.

[0074] When the foot pedal body 330 switches from the unfolded to the retracted state, the telescopic tube assembly 200 is pushed inward, and the locking pin 710 is released from the state locked by the second limiting part 150. The telescopic part 210 moves inward relative to the fixed tube 100. When the unlocking head 510 moves to disengage from the limiting boss 110, the unlocking head 510 no longer applies tension to the first locking tooth 410. When the telescopic part 210 continues to move until the locking pin 710 is inserted into the first limiting part 140, the position of the telescopic part 210 is locked. Since the first locking tooth 410 is not under tension, the first locking tooth 410 locks the second locking tooth 410. When the thrust of 20 disappears, the elastic force of the second elastic element 450 is released, the first locking part 441 separates from the second locking part 321, and the limiting post 421 is inserted into the second limiting groove 312; when the pedal body 330 is turned, the first base 310 and the second base 320 rotate relative to the rotating part 220, the limiting post 421 moves from the second limiting groove 312 to the first limiting groove 311, and the transmission torsion spring 600 accumulates elastic force. When the pedal body 330 rotates to the closed state, the limiting post 421 is inserted into the first limiting groove 311, and the closed state of the pedal body 330 is locked.

[0075] The present invention also provides a seat, including a seat body and the aforementioned automatically extendable footrest, wherein the fixing tube 100 of the automatically extendable footrest is mounted on the seat body. When the footrest assembly 300 is needed, the telescopic tube assembly 200 is pulled, and when the telescopic part 210 extends relative to the seat body, the footrest body 330 automatically unfolds to provide a place for the user's legs or feet; when the footrest assembly 300 is not needed, the telescopic tube assembly 200 is pushed, and the telescopic part 210 retracts into the interior of the fixing tube 100, and the footrest body 330 is bent to close.

[0076] 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. An automatically extending foot pedal, characterized in that, include: The fixed tube has a limiting boss inside; A telescopic tube assembly includes a telescopic part and a rotating part connected together, wherein the telescopic part is slidably connected to the inside of the fixed tube; A foot pedal assembly includes a first base, a second base, and a foot pedal body. The foot pedal body is connected to the first base and / or the second base. The rotating part is located between the first base and the second base. The rotating part is rotatably connected to the first base and the rotating part is rotatably connected to the second base. The functional gear assembly includes a first locking tooth and a second locking tooth. The first locking tooth is rotatably connected to the interior of the rotating part, and the second locking tooth is slidably connected to the interior of the rotating part. The first locking tooth and the second locking tooth abut against each other along the arrangement direction of the first base and the second base. The second locking tooth has a limiting post, and the first base has a first limiting groove. The limiting post can slide along the first limiting groove to insert into or retract from the first limiting groove. The unlocking mechanism includes an unlocking head and a linkage cable. The unlocking head is rotatably connected to the interior of the telescopic part, and a portion of the unlocking head can extend to the exterior of the telescopic part. One end of the linkage cable is connected to the unlocking head, and the other end is connected to the first locking tooth. The unlocking head can slide along with the telescopic part and abut against the limiting protrusion. The linkage cable pulls the first locking tooth to rotate relative to the rotating part, thereby the first locking tooth pushes the second locking tooth to move, so that the limiting post exits the first limiting groove. A transmission torsion spring, one end of which is connected to the first base or the second base, and the other end of which is connected to the rotating part, is used to push the pedal assembly to rotate relative to the rotating part to unfold the pedal body; the functional gear assembly also includes a first elastic element, a second elastic element, and a locking seat. The two ends of the first elastic element are respectively connected to the locking seat and the second locking tooth. The locking seat has a first locking part, and the second base has a second locking part. The locking seat can slide with the second locking tooth so that the first locking part and the second locking part can be inserted into each other when the pedal body is unfolded, and restrict the relative rotation of the pedal assembly and the rotating part; the two ends of the second elastic element are respectively connected to the locking seat and the second base; the first base also includes a second limiting groove. The first limiting groove and the second limiting groove are distributed along the circumference of the first base. The first locking part can be separated from the second locking part after the linkage releases the tension on the first locking tooth, and the limiting post is inserted into the second limiting groove.

2. The automatic extendable foot pedal according to claim 1, characterized in that, The first limiting groove and the second limiting groove are arranged adjacent to each other. The first base also includes a guide boss. The guide boss has an inclined surface on the side facing the limiting post. The inclined surface gradually approaches the first limiting groove along the direction towards the second locking tooth. The guide boss is located in the second limiting groove. The limiting post can slide in the second limiting groove and abut against the inclined surface so as to be inserted into the first limiting groove after the foot pedal body is closed.

3. The automatic extendable foot pedal according to claim 1, characterized in that, The first locking tooth has a first sliding boss and a second sliding boss connected together. The outer diameter of the second sliding boss is larger than the outer diameter of the first sliding boss. The locking seat has a first sliding channel and a second sliding channel that are interconnected. The inner diameter of the second sliding channel is larger than the inner diameter of the first sliding channel. The first sliding boss is slidably connected to the first sliding channel, and the second sliding boss is slidably connected to the second sliding channel and can abut against the inner wall of the end of the second sliding channel.

4. The automatic extendable foot pedal according to claim 3, characterized in that, The foot pedal assembly also includes a drive shaft, with its two ends connected to the first base and the second base, respectively. The drive shaft passes through the interior of the first locking tooth, the second locking tooth, and the locking seat. A limiting protrusion is provided on the side of the drive shaft, and the limiting protrusion is used to abut against the side of the second locking tooth facing away from the locking seat.

5. The automatic extendable foot pedal according to claim 1, characterized in that, The rotating part is provided with a limiting guide rib on the side facing the first base, and the first base is provided with an angle limiting part protruding towards the rotating part. The angle limiting part is inserted into the interior of the rotating part and can abut against the end faces of both ends of the limiting guide rib to limit the rotation angle of the foot pedal assembly.

6. The automatic extendable foot pedal according to claim 1, characterized in that, The surface of the telescopic part is provided with a protrusion in the radial direction, and the protrusion can abut against the limiting boss when the foot pedal body is in the unfolded state.

7. The automatic extendable foot pedal according to claim 1, characterized in that, The automatic extendable pedal also includes a position locking mechanism, which includes a locking pin and an elastic abutment. The locking pin is slidably connected to the inside of the telescopic part along the radial direction of the telescopic part and can extend to the outside of the telescopic part. The fixing tube is provided with a first limiting part and a second limiting part, which are arranged at intervals along the extension direction of the fixing tube. The locking pin can be inserted into the first limiting part when the pedal body is in the retracted state and into the second limiting part when the pedal body is in the extended state.

8. A seat, characterized in that, include: The automatic extendable foot pedal as claimed in any one of claims 1 to 7; The seat body, and the fixing tube is installed on the seat body.

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