Footrest adjusting structure, footrest device and seat
By incorporating a concentrically rotating cam and transmission assembly on the side wall of the footrest, the footrest can be automatically locked or unlocked, solving the problem of cumbersome operation of existing office chair footrests and improving the user experience and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- UE FURNITURE CO LTD
- Filing Date
- 2026-01-31
- Publication Date
- 2026-05-19
AI Technical Summary
The existing office chair footrests are cumbersome to operate during use, and the retraction of the telescopic rods causes the footrests to shift backward, resulting in a poor user experience.
A concentrically rotating cam is provided on the side wall of the footrest. The cam pushes the crossbar, which drives the lock head to engage or disengage from the lock hole through the transmission component, so as to realize the automatic switching of the footrest adjustment structure between the use state and the storage state.
The adjustment of the footrest has been simplified, providing stable support and clear feedback, thus improving the user experience and human-computer interaction.
Smart Images
Figure CN122056478A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of seating technology, specifically to a footrest adjustment structure, a footrest device, and a seating fixture. Background Technology
[0002] Office chairs are essential seating in the office environment. Office workers need to sit in office chairs for long periods of time, and maintaining the same posture for extended periods can easily lead to physical fatigue. To help users alleviate fatigue, most office chairs on the market now have a backrest tilt adjustment function, meaning the backrest can recline, allowing users to rest in a supine position and effectively relieve fatigue.
[0003] Furthermore, to allow users to lie back with their lower legs flat for a more natural and comfortable rest, some existing office chairs also include a footrest to support the user's feet. This footrest is slidably connected to the seat via a telescopic rod, and is also rotatably connected to the telescopic rod via a rotating mechanism. To use it, the footrest is first pulled out from under the seat using the telescopic rod, and then rotated to a horizontal position using the rotating mechanism. When lying back, the user can place their feet on the footrest, thus flattening their lower legs. Conversely, the footrest can be pulled back to avoid interfering with the normal use of the chair.
[0004] However, the above solution has the following problems: during use, the user's foot movements will cause the telescopic rod to retract, causing the footrest to move backward, meaning the footrest length is insufficient. At this time, the user needs to get up and pull the footrest forward again to make the telescopic rod reach its longest position, which is cumbersome and results in a poor user experience. Summary of the Invention
[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a footrest adjustment structure, footrest device and seat, by setting a concentric rotating cam part on the side wall of the footrest, the cam part rotates with the footrest and pushes the crossbar, the vertical bar moves with the crossbar and drives the lock head to engage or disengage from the lock hole through the transmission component; that is, the user only needs to rotate the footrest to unfold forward or retract backward to automatically lock or unlock the telescopic tube, realize the switching between the use state and the retracted state of the footrest adjustment structure, and make the use and operation of the footrest adjustment structure very simple.
[0006] The effects of this invention are achieved as follows:
[0007] In a first aspect, this application provides a footrest adjustment structure, comprising:
[0008] The telescopic assembly includes a tubular telescopic tube and a support tube. The support tube is sleeved on the telescopic tube, and the two are slidably arranged relative to each other in the front-back direction. A locking hole is formed on the support tube, and a locking adjustment mechanism is provided between the telescopic tube and the support tube.
[0009] The footrest is rotatably connected to the front end of the telescopic tube, and a cam-shaped cam part is provided on the side wall of the footrest. The cam part and the footrest rotate concentrically.
[0010] The locking adjustment mechanism includes a horizontal bar extending in the left-right direction, a vertical bar extending in the front-back direction, and a lock head. The vertical bar is slidably connected to the telescopic tube in the front-back direction. The horizontal bar and the vertical bar are relatively fixed, and the horizontal bar abuts against the rear side of the cam part. The lock head is slidably connected to the telescopic tube in the up-down direction, and the lock head and the lock hole are engaged. A transmission component is provided between the lock head and the vertical bar. The transmission component is configured to convert the front-back sliding of the vertical bar into the up-down sliding of the lock head.
[0011] The footrest adjustment mechanism has a switchable use state and a storage state. In the use state, the footrest extends forward to a horizontal position, the crossbar abuts against the narrower side of the cam, the lock head engages with the lock hole, and the telescopic tube and support tube remain relatively fixed. When the footrest rotates backward to be close to the telescopic tube, the cam rotates to the wider side, pushing the crossbar to slide backward. The vertical bar slides backward with the crossbar, and the vertical bar drives the lock head to move out of the lock hole through the transmission component. The telescopic tube slides backward relative to the support tube, and the footrest adjustment mechanism switches to the storage state.
[0012] Furthermore, the footrest adjustment structure includes a pair of symmetrical telescopic components. The telescopic tubes on both sides are connected by a horizontally arranged rotating support rod. Connecting holes are formed along the left and right sides of the footrest, through which the rotating support rod passes, allowing the footrest to rotate up and down around the rod. This gives the footrest adjustment structure higher strength and stronger stability during forward and backward sliding adjustment. The rotating support rod, with the footrest fitted between the two telescopic tubes, further enhances the stability of the footrest's rotational adjustment operation.
[0013] Furthermore, the side wall of the rotating support rod is also provided with a limiting protrusion, and the wall of the connecting hole is correspondingly recessed to form an arc-shaped limiting groove. When the foot plate rotates, the limiting protrusion moves along the limiting groove. This restricts the range of motion of the foot plate, making the adjustment operation of the foot plate adjustment structure more stable and convenient.
[0014] Furthermore, the footrest adjustment structure also includes a decorative sleeve, which is an L-shaped sleeve structure. One side of the decorative sleeve is fitted onto the cam part, and the other side is fitted onto the front end of the telescopic tube. The decorative sleeve covers the connection structure between the footrest and the telescopic tube, giving the footrest adjustment structure a better overall appearance and aesthetics.
[0015] Furthermore, the transmission assembly includes a connector and a slider. The connector is connected to the rear end of the longitudinal rod, and the lock head is disposed on the slider. At least one end face of the slider and the connector, which are close to each other, is inclined, so that when the connector is pushed backward by the longitudinal rod, the slider slides vertically along the inclined plane under the pressure of the connector, thereby causing the lock head to disengage from the lock hole. By utilizing the inclined plane between the connector and the slider, the horizontal forward and backward sliding of the longitudinal rod is converted into the vertical up and down movement of the lock head, resulting in a simple transmission method and a relatively stable process.
[0016] Furthermore, the rear end of the connector is recessed to form a connecting groove, the bottom of which is inclined. The front end of the slider protrudes to form a transmission protrusion, which engages with the connecting groove, and the front end face of the transmission protrusion is also inclined. This results in a stronger connection between the slider and the connector. The inclined rear end face of the transmission protrusion and the bottom of the connecting groove further ensure smoother and more stable transmission between the slider and the connector.
[0017] Furthermore, a first end cap is connected to the rear side of the telescopic tube. The first end cap includes a vertical covering part and a tubular insertion part. The covering part covers the opening of the telescopic tube, and the insertion part is inserted into the telescopic tube. The slider is located in the cavity of the insertion part. The lock head passes through the first end cap and the telescopic tube, and a first elastic element is provided between the slider and the insertion part. Under the elastic force of the first elastic element, the lock head always tends to engage with the lock hole. This not only ensures that the lock head can be stably engaged with the lock hole in the use state, but also that when changing from the storage state to the use state, the slider automatically moves downward under the elastic force of the first elastic element, and the lock head can automatically engage with the lock hole, making the operation of the footrest adjustment structure more convenient.
[0018] Furthermore, the first end cap also includes a tubular sleeve portion, with the insertion portion located within the cavity of the sleeve portion. The sleeve portion is fitted onto the telescopic tube, and the outer diameter of the sleeve portion is close to the inner diameter of the support tube. This results in higher connection strength and stability between the first end cap and the telescopic tube, and the first end cap can also be used as a bushing, thereby making the sliding operation of the telescopic tube more stable and smooth.
[0019] Secondly, this application provides a footrest device, including a tubular fixed tube and a footrest adjustment structure. The fixed tube is sleeved on the support tube, and the two are slidably arranged relative to each other in the front-back direction. The telescopic tube, the support tube, and the fixed tube form a three-section telescopic structure, thereby giving the footrest device a longer unfolded length and a smaller space occupied when folded.
[0020] Furthermore, the side wall of the fixed tube has a perforated locking hole, and a locking head is vertically slidably connected to the support tube. The locking head and the locking hole engage in a locking fit. A first end cap is connected to the rear side of the telescopic tube, and a linkage component is provided between the first end cap and the locking head. This linkage component is configured to convert the forward and backward sliding of the first end cap into the up and down sliding of the locking head. In the use state, the locking head engages in the locking hole, and the fixed tube and support tube remain relatively fixed. In the storage state, the telescopic tube and the first end cap slide backward together, and the first end cap, through the linkage component, moves the locking head to disengage from the locking hole, causing the support tube to slide backward relative to the fixed tube. When switching from the use state to the storage state, the user only needs to push the telescopic tube backward. The first end cap moves with the telescopic tube and, with the help of the linkage component, moves the locking head, automatically unlocking the support tube, making the adjustment of the footrest device much simpler.
[0021] Furthermore, a second end cap is embedded at the rear end of the support tube. The second end cap has a first groove extending vertically, and its front end is recessed to form a second groove. The second groove connects to the first groove. The linkage component includes a locking block and a pushing member. The locking head is disposed on the locking block, and the locking block is slidably connected to the second end cap via the first groove. The pushing member is slidably connected to the second end cap via the second groove. At least one end face of the locking block and the pushing member is inclined, so that when the pushing member is pushed backward by the first end cap, the locking block slides vertically along the inclined surface under the pressure of the pushing member, thereby causing the locking head to disengage from the locking hole. By utilizing the inclined surface between the locking block and the pushing member, the horizontal sliding of the first end cap is converted into the vertical movement of the locking head, resulting in a simple transmission method and a relatively stable process.
[0022] Furthermore, both sides of the locking block have protruding linkage protrusions, with the lower sidewalls of the linkage protrusions inclined. The pushing component includes a front-side transversely positioned abutment portion, with both sides of the abutment portion bent backward to form clamping portions. The inner sidewalls of the clamping portions are recessed to form clamping grooves. Each linkage protrusion on one side engages with the corresponding clamping groove, and the lower sidewall of the clamping groove is inclined. This enhances the connection strength and stability between the locking block and the pushing component. The inclined bottom surfaces of the linkage protrusions and the lower sidewalls of the clamping grooves further ensure smoother and more stable transmission between the locking block and the pushing component.
[0023] Furthermore, a hook is provided on the side wall of the clamping part facing away from the clamping block, and the second sliding groove has a stepped structure that is wider on the inside and narrower on the outside. This makes the connection stability of the pusher and the second end cover higher; and the clamping block, the pusher and the second end cover remain relatively fixed after assembly, so that the clamping block and the pusher can be embedded into the support tube together with the second end cover, making the assembly operation of the foot rest device very simple.
[0024] Furthermore, a second elastic element is provided between the locking block and the second end cap. Under the elastic force of the second elastic element, the locking head always tends to engage with the locking hole. This not only ensures that the locking head can stably engage with the locking hole in the use state, but also that when switching from the storage state to the use state, the locking block automatically moves downward under the elastic force of the second elastic element, making the use and operation of the foot rest device simpler.
[0025] Thirdly, this application provides a seating arrangement including a seat and a footrest. The seat has a base with a fixing tube on its side wall. In the stowed state, the footrest moves backward to fit against the bottom of the base. The footrest fits seamlessly into the base, without being obtrusive and not easily exposed from the seat, thus enhancing the aesthetics of the seating arrangement.
[0026] The footrest adjustment structure, footrest device, and seat provided in this application, through a locking adjustment mechanism, ensure that the lock head engages with the lock hole in the use state, keeping the telescopic tube and support tube relatively fixed. This means the telescopic component and footrest can remain in a constant state, and the footrest can stably support the user's feet. A concentrically rotating cam is provided on the side wall of the footrest. The cam rotates with the footrest and pushes the crossbar. The vertical bar moves with the crossbar and, through a transmission component, drives the lock head to engage or disengage from the lock hole, thereby locking or unlocking the telescopic tube. In other words, the user only needs to rotate the footrest to extend forward or retract backward to automatically lock or unlock the telescopic tube, eliminating the need for manual adjustment of the lock head. This allows for easy switching between the use and retracted states of the footrest adjustment structure, making its operation extremely simple.
[0027] Furthermore, when the user pulls the footrest out from the bottom of the chair, the lock pops out and engages with the lock hole when the telescopic tube extends to its furthest position, fixing the telescopic tube and the support tube relatively in place. This provides clear feedback to the user, reminding them that the telescopic tube is currently at its furthest position and the footrest can be unfolded for use, demonstrating strong human-computer interaction. Attached Figure Description
[0028] Figure 1 This is a three-dimensional structural diagram of the seating in use provided in the embodiments of this application;
[0029] Figure 2 A three-dimensional structural diagram of the seat in its stowed state provided in an embodiment of this application;
[0030] Figure 3 A schematic diagram of the connection structure between the footrest and the telescopic tube provided in an embodiment of this application;
[0031] Figure 4 A schematic diagram illustrating the state change of the footrest when switching from a usage state to a storage state, provided as an embodiment of this application.
[0032] Figure 5 A schematic diagram illustrating the state changes of the cam and crossbar when switching from the usage state to the storage state, as provided in an embodiment of this application.
[0033] Figure 6 This is a schematic diagram of the connection structure between the telescopic tube and the support tube provided in an embodiment of this application;
[0034] Figure 7 A schematic diagram of the connection structure between the connector and the telescopic tube provided in an embodiment of this application;
[0035] Figure 8 A schematic diagram of the connection structure between the first end cap and the telescopic tube provided in an embodiment of this application;
[0036] Figure 9 A schematic diagram illustrating the state change of the support tube when switching from the usage state to the storage state, provided for an embodiment of this application;
[0037] Figure 10 This is a schematic diagram of the connection structure between the fixed tube and the support tube provided in an embodiment of this application;
[0038] Figure 11 A schematic diagram of the connection structure between the fixing tube and the second end cap provided in an embodiment of this application;
[0039] Figure 12 A schematic diagram of the connection structure between the second end cap, the pusher, and the locking block provided in an embodiment of this application;
[0040] Figure 13 A schematic diagram illustrating the state change of the fixing tube when switching from the usage state to the storage state, provided for an embodiment of this application;
[0041] Figure 14 This is a cross-sectional structural diagram of the fixed tube and support tube provided in the embodiments of this application.
[0042] The reference numerals in the attached drawings are as follows: 1-telescopic tube, 110-rotating support rod, 111-limiting protrusion, 120-adjusting support groove, 130-combination hole, 140-second buckle groove, 2-support tube, 210-locking hole, 220-third buckle groove, 3-foot rest, 3a-upper housing, 3b-lower housing, 310-cam part, 320-connecting hole, 321-limiting groove, 4-crossbar, 5-vertical bar, 6-slider, 610-lock head, 620-transmission protrusion, 630-first elastic element, 7-decorative sleeve, 7a-upper sleeve part, 7b-lower sleeve part, 710-connecting post, 8-connector, 810-connecting groove, 820-first buckle, 830-third insertion hole, 9-first end cap, 910-covering part, 920-insertion 921-First snap groove, 922-Second snap, 930-Socket part, 10-Fixing tube, 1010-Snap hole, 1020-Mounting plate, 11-Snap block, 1110-Snap head, 1120-Linkage protrusion, 1130-Second elastic element, 12-Pushing element, 1210-Abutting part, 1220-Clamping part, 1221-Clamping groove, 1222-Snap hook, 13-Second end cover, 13a-First cover body, 13b-Second cover body, 1310-First sliding groove, 1320-Second sliding groove, 1330-Positioning groove, 1340-Positioning protrusion, 1350-Third snap, 14-Seat, 1410-Chassis, 15-Connecting element, 1510-First insertion hole, 1520-Second insertion hole. Detailed Implementation
[0043] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.
[0044] Please refer to the attached document. Figure 1-14 This application provides a footrest adjustment structure, including:
[0045] The telescopic assembly includes a tubular telescopic tube 1 and a support tube 2. The support tube 2 is sleeved on the telescopic tube 1, and the two are slidably arranged relative to each other in the front-back direction. A locking hole 210 is formed on the support tube 2. A locking adjustment mechanism is provided between the telescopic tube 1 and the support tube 2.
[0046] The footrest 3 is rotatably connected to the front end of the telescopic tube 1, and a cam-shaped cam part 310 is provided on the side wall of the footrest 3. The cam part 310 and the footrest 3 rotate concentrically.
[0047] The locking adjustment mechanism includes a horizontal bar 4 extending in the left-right direction, a vertical bar 5 extending in the front-back direction, and a lock head 610. The vertical bar 5 is slidably connected to the telescopic tube 1 in the front-back direction. The horizontal bar 4 and the vertical bar 5 are relatively fixed, and the horizontal bar 4 abuts against the rear side of the cam part 310. The lock head 610 is slidably connected to the telescopic tube 1 in the up-down direction, and the lock head 610 is engaged with the lock hole 210. A transmission component is provided between the lock head 610 and the vertical bar 5. The transmission component is configured to convert the front-back sliding of the vertical bar 5 into the up-down sliding of the lock head 610.
[0048] The footrest adjustment structure has a switchable use state and a storage state. In the use state, the footrest 3 unfolds forward to the horizontal, the crossbar 4 abuts against the narrower side of the cam part 310, the lock head 610 is engaged with the lock hole 210, and the telescopic tube 1 and the support tube 2 remain relatively fixed. When the footrest 3 rotates backward to be close to the telescopic tube 1, the cam part 310 rotates to the wider side and pushes the crossbar 4 to slide backward. The vertical bar 5 slides backward with the crossbar 4, and the vertical bar 5 drives the lock head 610 to move out of the lock hole 210 through the transmission component. The telescopic tube 1 slides backward relative to the support tube 2, and the footrest adjustment structure switches to the storage state.
[0049] In this embodiment, with the help of the locking adjustment mechanism, the lock head 610 engages with the lock hole 210 in the use state, keeping the telescopic tube 1 and the support tube 2 relatively fixed. That is, the state of the telescopic component and the footrest 3 can remain unchanged, and the footrest 3 can stably support the user's feet. By providing a concentrically rotating cam part 310 on the side wall of the footrest 3, the cam part 310 rotates together with the footrest 3 and pushes the crossbar 4. The vertical bar 5 moves together with the crossbar 4 and drives the lock head 610 to engage or disengage from the lock hole 210 through the transmission component, thereby locking or unlocking the telescopic tube 1. That is, the user only needs to rotate the footrest 3 to unfold forward or retract backward to automatically lock or unlock the telescopic tube 1 without manually adjusting the lock head 610, realizing the switching between the use state and the retracted state of the footrest adjustment structure, making the use and operation of the footrest adjustment structure very simple. Furthermore, when the user pulls the footrest 3 out from the bottom of the seat, when the telescopic tube 1 extends to its furthest position, the lock head 610 pops out and engages with the lock hole 210, the telescopic tube 1 and the support tube 2 are relatively fixed, and the user is given clear feedback, reminding the user that the telescopic tube 1 is currently at its furthest position and the footrest 3 can be unfolded for use, which has a strong human-computer interaction.
[0050] Please refer to the appendix. Figure 7The locking adjustment mechanism also includes a connector 15, which is a block structure inserted into the telescopic tube 1. The connector 15 can slide back and forth along the telescopic tube 1. A front-to-back extending adjustment support groove 120 is formed on one side wall of the telescopic tube 1 near the cam portion 310. A first insertion hole 1510 is provided on the side of the connector 15 near the adjustment support groove 120. One end of the crossbar 4 is inserted into the connector 15 through the first insertion hole 1510, and the other end of the crossbar 4 passes through the adjustment support groove 120 and abuts against the cam portion 310. A second insertion hole 1520 extending left and right is formed on the rear side of the connector 15. The front end of the vertical rod 5 is bent laterally and inserted into the connector 15 through the second insertion hole 1520. The connector 15 connects the crossbar 4 and the vertical rod 5, making the adjustment operation of the locking adjustment mechanism more stable and smooth.
[0051] Please refer to the attached document. Figure 3-4 In some embodiments of this application, the footrest adjustment structure includes a pair of telescopic components that are symmetrically arranged on the left and right. The telescopic tubes 1 on both sides are connected by a horizontally arranged rotating support rod 110. The footrest 3 has a connecting hole 320 formed on the left and right sides. The rotating support rod 110 passes through the connecting hole 320, so that the footrest 3 rotates up and down around the rotating support rod 110.
[0052] In this embodiment, by setting a pair of symmetrical telescopic components, the footrest adjustment structure has higher strength, the stability of the footrest 3's forward and backward sliding adjustment operation is stronger, and the rotational support rod 110 between the two telescopic tubes 1 of the footrest 3 further enhances the stability of the footrest 3's rotational adjustment operation. Each side wall of the footrest 3 is provided with a cam portion 310, and each cam portion 310 abuts against the crossbar 4 on the corresponding side of the telescopic tube 1.
[0053] Please refer to the attached document. Figure 4 In some embodiments of this application, the side wall of the rotating support rod 110 is also provided with a limiting protrusion 111, and the hole wall of the connecting hole 320 is correspondingly recessed to form an arc-shaped limiting groove 321. When the foot plate 3 rotates, the limiting protrusion 111 moves along the limiting groove 321.
[0054] In this embodiment, the movement range of the footrest 3 is limited by the interlocking limiting groove 321 and limiting protrusion 111. (See attached diagram) Figure 4As shown, in use, the footrest 3 rotates forward to a horizontal position, with the limiting protrusion 111 abutting against one side of the limiting groove 321, preventing the footrest 3 from rotating further downward and allowing it to stably support the user's feet. In the storage position, the footrest 3 flips backward to be close to the telescopic tube 1, with the limiting protrusion 111 abutting against the other side of the limiting groove 321, preventing it from rotating further downward and allowing it to hover in its current position for easy storage. This makes the adjustment of the footrest adjustment structure smoother and simpler.
[0055] Preferably, please refer to the appendix. Figure 3 The rotating support rod 110 and the telescopic tubes 1 on both sides are welded and fixed. The foot plate 3 has a split structure, including an upper shell 3a and a lower shell 3b that are spliced together. The cam part 310 is divided into two parts by the upper shell 3a and the lower shell 3b, and the sides of the upper shell 3a and the lower shell 3b that are close to each other are recessed. The recessed parts are combined to form the connecting hole 320. When installing the foot plate 3 onto the rotating support rod 110, first splice the upper shell 3a and the lower shell 3b onto the upper and lower sides of the rotating support rod 110 respectively, and then screw the upper shell 3a and the lower shell 3b together to fix them. This completes the assembly operation of the foot plate 3 and the rotating support rod 110, which is not only easy to operate, but also ensures the connection strength.
[0056] Please refer to the attached document. Figure 1-3 In some embodiments of this application, the footrest adjustment structure further includes a decorative sleeve 7, which is an L-shaped sleeve structure. One side of the decorative sleeve 7 is fitted onto the cam portion 310, and the other side is fitted onto the front end of the telescopic tube 1. The cam portion 310, the rotating support rod 110, and the crossbar 4 are all located inside the decorative sleeve 7. That is, the decorative sleeve 7 covers the connection structure between the footrest 3 and the telescopic tube 1, giving the footrest adjustment structure better overall integrity and aesthetics.
[0057] Preferably, please refer to the appendix. Figure 3 The decorative sleeve 7 is a split structure, including an upper sleeve 7a and a lower sleeve 7b that are spliced together. The bottom of the upper sleeve 7a is provided with a vertical connecting post 710. The telescopic tube 1 has a vertically hollowed-out combination hole 130. When the upper sleeve 7a and the lower sleeve 7b are spliced together, the connecting post 710 passes through the combination hole 130 and abuts against the lower sleeve 7b. Then, a screw passes through the lower sleeve 7b and is screwed to the connecting post 710, thereby combining the decorative sleeve 7 and the telescopic tube 1 together. This makes assembly convenient and provides a high connection strength.
[0058] Please refer to the attached document. Figure 8-9In some embodiments of this application, the transmission assembly includes a connector 8 and a slider 6. The connector 8 is connected to the rear end of the longitudinal rod 5, and the lock head 610 is disposed on the slider 6. At least one end face of the slider 6 and the connector 8 that are close to each other is inclined, so that when the connector 8 is pushed backward by the longitudinal rod 5, the slider 6 slides vertically along the inclined surface under the pressure of the connector 8, thereby causing the lock head 610 to disengage from the lock hole 210. By means of the inclined surface between the connector 8 and the slider 6, the forward and backward sliding of the longitudinal rod 5 in the horizontal direction is converted into the up and down movement of the lock head 610 in the vertical direction. The transmission method is simple and the process is relatively stable.
[0059] Please refer to the attached document. Figure 8-9 In some embodiments of this application, the rear end of the connector 8 is recessed to form a connecting groove 810, the bottom of the connecting groove 810 is inclined, the front end of the slider 6 is protruding to form a transmission protrusion 620, the transmission protrusion 620 is inserted into the connecting groove 810, and the front end surface of the transmission protrusion 620 is inclined.
[0060] In this embodiment, by providing a transmission protrusion 620 and a connecting groove 810 that interlock, the connection strength between the slider 6 and the connector 8 is increased. Furthermore, the rear end face of the transmission protrusion 620 and the bottom of the connecting groove 810 are both inclined, with the inclined surfaces on both sides fitting together, making the transmission operation between the slider 6 and the connector 8 more stable and smooth. Of course, in other embodiments of this application, only one side of the rear end face of the transmission protrusion 620 and the bottom of the connecting groove 810 may be inclined.
[0061] The rear end of the longitudinal rod 5 is bent laterally, and the front side of the connector 8 is hollowed out along the left and right directions to form a third insertion hole 830. The rear end of the longitudinal rod 5 and the third insertion hole 830 are inserted and matched, so that the longitudinal rod 5 and the connector 8 are relatively fixed in the front and rear directions, which makes assembly convenient.
[0062] Please refer to the attached document. Figure 8-9 In some embodiments of this application, a first end cap 9 is connected to the rear side of the telescopic tube 1. The first end cap 9 includes a vertical covering part 910 and a tubular insertion part 920. The covering part 910 covers the opening of the telescopic tube 1, and the insertion part 920 is inserted into the telescopic tube 1. The slider 6 is located in the cavity of the insertion part 920. The lock head 610 passes through the first end cap 9 and the telescopic tube 1, and a first elastic member 630 is provided between the slider 6 and the insertion part 920. Under the elastic force of the first elastic member 630, the lock head 610 always tends to be inserted into the lock hole 210.
[0063] In this embodiment, with the help of the elastic force of the first elastic element 630, not only can the lock head 630 be stably engaged in the lock hole 210 in the use state, the connection strength and stability between the telescopic tube 1 and the support tube 2 are high, but when changing from the storage state to the use state, the connecting member 8 moves forward again with the telescopic tube 1, and the slider 6 moves downward automatically under the action of the elastic force of the first elastic element 630, so that the lock head 610 can automatically engage in the lock hole 210, making the use and operation of the footrest adjustment structure more convenient; and when the lock head 610 pops out and engages in the lock hole 210, it is accompanied by obvious vibration and a crisp sound, so as to intuitively remind the user that the telescopic tube 1 has been locked, and the human-computer interaction is good.
[0064] Preferably, the first elastic element 630 is a spring. The spring not only has good elasticity, but also has a simple structure, making it easy to snap into the insertion part 920 and facilitating assembly.
[0065] Please refer to the attached document. Figure 8-9 In some embodiments of this application, the first end cap 9 further includes a tubular sleeve portion 930, with a plug portion 920 located in the cavity of the sleeve portion 930. The sleeve portion 930 is sleeved on the telescopic tube 1, and the outer diameter of the sleeve portion 930 is close to the inner diameter of the support tube 2.
[0066] In this embodiment, the telescopic tube 1 is clamped between the sleeve portion 930 and the insertion portion 920, which makes the connection strength and stability between the first end cap 9 and the telescopic tube 1 higher. Furthermore, the outer diameter of the sleeve portion 930 is similar to the inner diameter of the support tube 2, meaning that the first end cap 9 can also be used as a bushing, thereby making the sliding operation of the telescopic tube 1 more stable and smooth.
[0067] Please refer to the appendix. Figure 8 The connector 8 has first buckles 820 protruding from both its left and right side walls. The insertion part 920 has correspondingly hollowed-out first buckle grooves 921 extending in the front-to-back direction on its side wall. Second buckles 922 also protrude from both its left and right side walls. The telescopic tube 1 has second buckle grooves 140 hollowed out on its left and right side walls. When the first end cap 9 is connected to the telescopic tube 1, the first buckle 820 engages with the first buckle groove 921 and can slide back and forth along it. The second buckle 922 engages with the second buckle groove 140, thus combining the connector 8, the first end cap 9, and the telescopic tube 1 together, resulting in a stronger and more stable connection.
[0068] Please refer to the attached document. Figure 10-13 This application embodiment also provides a footrest device, including a tubular fixing tube 10 and a footrest adjustment structure. The fixing tube 10 is sleeved on the support tube 2, and the two are slidably arranged relative to each other in the front-back direction.
[0069] In this embodiment, by setting the fixed tube 10 to be sleeved with the support tube 2, the telescopic tube 1, the support tube 2 and the fixed tube 10 form a three-section telescopic structure, thereby making the footrest device have a longer unfolded length and occupy less space after being stored.
[0070] Please refer to the attached document. Figure 10-11 In some embodiments of this application, a locking hole 1010 is formed on the side wall of the fixed tube 10, and a locking head 1110 is vertically slidably connected to the support tube 2. The locking head 1110 and the locking hole 1010 are engaged. A first end cap 9 is connected to the rear side of the telescopic tube 1. A linkage component is provided between the first end cap 9 and the locking head 1110. The linkage component is configured to convert the forward and backward sliding of the first end cap 9 into the up and down sliding of the locking head 1110. In the use state, the locking head 1110 is inserted into the locking hole 1010, and the fixed tube 10 and the support tube 2 remain relatively fixed. In the storage state, the telescopic tube 1 and the first end cap 9 slide backward together, and the first end cap 9 drives the locking head 1110 to move out of the locking hole 1010 through the linkage component. The support tube 2 slides backward relative to the fixed tube 10.
[0071] In this embodiment, when switching from the use state to the storage state, the user only needs to push the telescopic tube 1 backward. The first end cap 9 moves with the telescopic tube 1 and drives the locking head 1110 to move with the help of the linkage component, which can automatically unlock the support tube 2. There is no need to manually adjust the locking head 1110, so that the support tube 2 can slide backward for storage, thereby making the adjustment operation of the footrest device more convenient.
[0072] Please refer to the attached document. Figure 11-13 In some embodiments of this application, a second end cap 13 is embedded at the rear end of the support tube 2. A first sliding groove 1310 extending vertically is formed on the second end cap 13, and a second sliding groove 1320 is formed at the front end of the second end cap 13. The second sliding groove 1320 communicates with the first sliding groove 1310. The linkage component includes a locking block 11 and a pushing member 12. A locking head 1110 is disposed on the locking block 11, and the locking block 11 is slidably connected to the second end cap 13 through the first sliding groove 1310. The pushing member 12 is slidably connected to the second end cap 13 through the second sliding groove 1320. At least one end face of the locking block 11 and the pushing member 12 is inclined, so that when the pushing member 12 is pushed backward by the first end cap 9, the locking block 11 slides vertically along the inclined surface under the pressure of the pushing member 12, thereby causing the locking head 1110 to disengage from the locking hole 1010. By using the inclined surface between the locking block 11 and the pushing member 12, the horizontal back-and-forth sliding of the first end cover 9 is converted into the vertical up-and-down movement of the locking head 1110. The transmission method is simple and the process is relatively stable.
[0073] Please refer to the attached document. Figure 12In some embodiments of this application, the left and right side walls of the card block 11 are both extended to form linkage protrusions 1120. The lower side wall of the linkage protrusion 1120 is inclined. The push member 12 includes a front side laterally arranged abutment portion 1210. The left and right sides of the abutment portion 1210 are both bent backward to form clamping portions 1220. The inner side wall of the clamping portion 1220 is recessed to form a clamping groove 1221. The linkage protrusion 1120 on each side is inserted into the clamping groove 1221 on the corresponding side, and the lower side wall of the clamping groove 1221 is inclined.
[0074] In this embodiment, the pusher 12 clamps the block 11 via the clamping portions 1220 on both sides, and the linkage protrusions 1120 on both sides of the block 11 engage with the clamping grooves 1221, resulting in higher connection strength and stability between the block 11 and the pusher 12. Furthermore, the bottom surface of the linkage protrusion 1120 and the lower wall of the clamping groove 1221 are both inclined, with the inclined surfaces on both sides fitting together, making the transmission operation between the block 11 and the pusher 12 smoother and more stable. Of course, in other embodiments of this application, only one side of the bottom surface of the linkage protrusion 1120 and the lower wall of the clamping groove 1221 may be inclined.
[0075] The second end cap 13 is a split structure, comprising a first cap 13a and a second cap 13b joined together on the left and right sides. The first cap 13a and the second cap 13b are recessed on their adjacent sides, forming a first sliding groove 1310 and a second sliding groove 1320. When assembling the locking block 11 and the pushing member 12 to the second end cap 13, the locking block 11 and the pushing member 12 can be placed on the first cap 13a first, and then the second cap 13b can be joined to the first cap 13a, thus assembling the locking block 11, the pushing member 12, and the second end cap 13 together. This operation is simple. Furthermore, the inner wall of the first cover 13a is recessed to form multiple positioning grooves 1330, and the inner wall of the second cover 13b is correspondingly provided with multiple positioning protrusions 1340. When the first cover 13a and the second cover 13b are spliced together, the positioning protrusions 1340 are engaged with the corresponding positioning grooves 1330, ensuring precise positioning and giving the assembled second end cover 13 good strength. Additionally, both the left and right side walls of the second end cover 13 are provided with third buckles 1350, and the left and right side walls of the support tube 2 are correspondingly hollowed out to form third buckle grooves 220. When the second end cover 13 is embedded in the support tube 2, the third buckles 1350 are engaged with the third buckle grooves 220, which not only facilitates assembly but also keeps the second end cover 13 and the support tube 2 relatively fixed, resulting in higher connection strength.
[0076] Please refer to the attached document. Figure 12 and attached Figure 14In some embodiments of this application, the clamping part 1220 is provided with a hook 1222 on the side wall facing away from the card block 11, and the second sliding groove 1320 is a stepped structure that is wider inside and narrower outside. This design ensures that the pusher 12 will not slide forward too far and disengage from the second slide groove 1320 due to the restriction of the hook 1222, resulting in higher connection stability. Furthermore, when assembling the footrest device, the pusher 12 and the locking block 11 can be installed on the second end cover 13 first. The second slide groove 1320 and the hook 1222 engage, preventing the pusher 12 from disengaging forward from the second slide groove 1320. Meanwhile, the linkage protrusion 1120 of the locking block 11 engages with the clamping groove 1221, preventing the locking block 11 from disengaging downward from the first slide groove 1310. In other words, the locking block 11, the pusher 12, and the second end cover 13 remain relatively fixed after assembly, allowing the locking block 11 and the pusher 12 to be embedded into the support tube 2 along with the second end cover 13. This makes the assembly operation of the footrest device very simple.
[0077] Please refer to the attached document. Figure 12-13 In some embodiments of this application, a second elastic element 1130 is provided between the card block 11 and the second end cap 13, and the card head 1110 always tends to be inserted into the card hole 1010 under the elastic force of the second elastic element 1130.
[0078] In this embodiment, with the help of the elastic force of the second elastic element 1130, not only can the locking head 1110 be stably locked in the locking hole 1010 in the use state, but the connection strength and stability between the locking block 11 and the second end cap 13 are also high. When changing from the storage state to the use state, the second end cap 13 moves forward again with the support tube 2, and the locking block 11 moves downward automatically under the action of the elastic force of the second elastic element 1130. The locking head 1110 can automatically lock into the locking hole 1010, making the use and operation of the foot rest device more convenient. Furthermore, when the locking head 1110 pops out and locks into the locking hole 1010, it is accompanied by obvious vibration and a crisp sound, thus intuitively reminding the user that the support tube 2 has been locked, and the human-computer interaction is good.
[0079] Preferably, the second elastic element 1130 is a spring. The spring not only has good elasticity, but also has a simple structure, making it easy to snap into the first sliding groove 1310 and facilitating assembly.
[0080] Please refer to the attached document. Figure 1-2 This application embodiment also provides a seating device, including a seat 14 and a footrest device. The bottom of the seat 14 is provided with a chassis 1410, and the fixing tube 10 is provided on the side wall of the chassis 1410. In the storage state, the footrest 3 moves backward to fit against the bottom of the chassis 1410.
[0081] In this embodiment, in the stowed state, the fixing tube 10 and the telescopic component are stowed to the side of the chassis 1410, while the footrest 3 is stowed to the bottom of the chassis 1410. That is, the footrest device is completely attached to the chassis 1410, without any abruptness and not easily exposed to the seat 14, making the seat more aesthetically pleasing.
[0082] The inner wall of the fixed tube 10 is connected to a vertical mounting plate 1020. The mounting plate 1020 is attached to the side wall of the chassis 1410, and the mounting plate 1020 and the chassis 1410 are fixed by screws. The mounting plate 1020 is easy to install and remove and the connection strength is high.
[0083] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present 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, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise stated, "a plurality of" means three or more.
[0084] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.
Claims
1. A footrest adjustment structure, characterized in that, include: The telescopic assembly includes a tubular telescopic tube (1) and a support tube (2). The support tube (2) is sleeved on the telescopic tube (1), and the two are slidably arranged relative to each other in the front-back direction. A locking hole (210) is formed on the support tube (2). A locking adjustment mechanism is provided between the telescopic tube (1) and the support tube (2). Footrest (3), the footrest (3) is rotatably connected to the front end of the telescopic tube (1), and a cam-shaped cam part (310) is provided on the side wall of the footrest (3), the cam part (310) and the footrest (3) rotate concentrically; A locking adjustment mechanism is provided, comprising a horizontal bar (4) extending in the left-right direction, a vertical bar (5) extending in the front-back direction, and a lock head (610). The vertical bar (5) is slidably connected to the telescopic tube (1) in the front-back direction. The horizontal bar (4) and the vertical bar (5) are relatively fixed, and the horizontal bar (4) abuts against the rear side of the cam part (310). The lock head (610) is slidably connected to the telescopic tube (1) in the up-down direction, and the lock head (610) is engaged with the lock hole (210). A transmission component is provided between the lock head (610) and the vertical bar (5). The transmission component is configured to convert the front-back sliding of the vertical bar (5) into the up-down sliding of the lock head (610). The footrest adjustment structure has a switchable use state and a storage state. In the use state, the footrest (3) unfolds forward to the horizontal, the crossbar (4) abuts against the narrower side of the cam part (310), the lock head (610) is engaged with the lock hole (210), and the telescopic tube (1) and the support tube (2) remain relatively fixed. When the footrest (3) rotates backward to be close to the telescopic tube (1), the cam part (310) rotates to the wider side to push the crossbar (4) to slide backward, the vertical rod (5) slides backward with the crossbar (4), and the vertical rod (5) drives the lock head (610) to move away from the lock hole (210) through the transmission assembly. The telescopic tube (1) slides backward relative to the support tube (2), and the footrest adjustment structure switches to the storage state.
2. The footrest adjustment structure according to claim 1, characterized in that, The footrest adjustment structure includes a pair of telescopic components that are symmetrical on the left and right. The telescopic tubes (1) on both sides are connected by a horizontally arranged rotating support rod (110). The footrest (3) has a connecting hole (320) formed on the left and right sides. The rotating support rod (110) passes through the connecting hole (320), so that the footrest (3) rotates up and down around the rotating support rod (110).
3. The footrest adjustment structure according to claim 2, characterized in that, The side wall of the rotating support rod (110) is also provided with a limiting protrusion (111), and the hole wall of the connecting hole (320) is correspondingly recessed to form an arc-shaped limiting groove (321). When the foot plate (3) rotates, the limiting protrusion (111) moves along the limiting groove (321).
4. The footrest adjustment structure according to claim 1, characterized in that, The footrest adjustment structure also includes a decorative sleeve (7), which is an L-shaped sleeve structure. One side of the decorative sleeve (7) is fitted onto the cam part (310), and the other side is fitted onto the front end of the telescopic tube (1).
5. The footrest adjustment structure according to claim 1, characterized in that, The transmission assembly includes a connector (8) and a slider (6). The connector (8) is connected to the rear end of the vertical rod (5). The lock head (610) is disposed on the slider (6). At least one end face of the slider (6) and the connector (8) is inclined, so that when the connector (8) is pushed backward by the vertical rod (5), the slider (6) slides vertically along the inclined surface under the pressure of the connector (8), thereby causing the lock head (610) to disengage from the lock hole (210).
6. The footrest adjustment structure according to claim 5, characterized in that, The rear end of the connector (8) is recessed to form a connecting groove (810), the bottom of the connecting groove (810) is inclined, and the front end of the slider (6) is protruding to form a transmission protrusion (620), the transmission protrusion (620) is inserted into the connecting groove (810), and the front end face of the transmission protrusion (620) is inclined.
7. The footrest adjustment structure according to claim 5, characterized in that, The telescopic tube (1) is connected to a first end cap (9) on its rear side. The first end cap (9) includes a vertical covering part (910) and a tubular insertion part (920). The covering part (910) covers the opening of the telescopic tube (1), and the insertion part (920) is inserted into the telescopic tube (1). The slider (6) is located in the cavity of the insertion part (920). The lock head (610) passes through the first end cap (9) and the telescopic tube (1). A first elastic element (630) is provided between the slider (6) and the insertion part (920). Under the elastic force of the first elastic element (630), the lock head (610) always tends to be inserted into the lock hole (210).
8. The footrest adjustment structure according to claim 7, characterized in that, The first end cap (9) also includes a tubular sleeve (930), the insertion part (920) is located in the cavity of the sleeve (930), the sleeve (930) is sleeved on the telescopic tube (1) and the outer diameter of the sleeve (930) is close to the inner diameter of the support tube (2).
9. A footrest device, characterized in that, It includes a tubular fixing tube (10) and a footrest adjustment structure as described in any one of claims 1-8, wherein the fixing tube (10) is sleeved on the support tube (2) and the two are slidably arranged relative to each other in the front-back direction.
10. The footrest device according to claim 9, characterized in that, The side wall of the fixed tube (10) has a perforated hole (1010). A clamping head (1110) is vertically slidably connected to the support tube (2). The clamping head (1110) and the clamping hole (1010) are engaged. The rear side of the telescopic tube (1) is connected to a first end cap (9). A linkage component is provided between the first end cap (9) and the clamping head (1110). The linkage component is configured to convert the forward and backward sliding of the first end cap (9) into the movement of the clamping head (1110). 10) slides up and down; in use, the clip (1110) is inserted into the clip hole (1010), and the fixed tube (10) and the support tube (2) remain relatively fixed; in storage, the telescopic tube (1) and the first end cap (9) slide backward together, and the first end cap (9) drives the clip (1110) to move away from the clip hole (1010) through the linkage component, and the support tube (2) slides backward relative to the fixed tube (10).
11. The footrest device according to claim 10, characterized in that, The rear end of the support tube (2) is fitted with a second end cap (13). The second end cap (13) has a first sliding groove (1310) extending vertically, and the front end of the second end cap (13) is recessed to form a second sliding groove (1320). The second sliding groove (1320) communicates with the first sliding groove (1310). The linkage component includes a locking block (11) and a pushing member (12). The locking head (1110) is disposed on the locking block (11), and the locking block (11) passes through the first sliding groove (1310). The pusher (12) is slidably connected to the second end cap (13) and is slidably connected to the second end cap (13) through the second slide groove (1320). At least one side of the end face of the locking block (11) and the pusher (12) is inclined, so that when the pusher (12) is pushed backward by the first end cap (9), the locking block (11) slides vertically along the inclined surface under the pressure of the pusher (12), thereby driving the locking head (1110) to disengage from the locking hole (1010).
12. The footrest device according to claim 11, characterized in that, The left and right side walls of the card block (11) are both extended to form linkage protrusions (1120). The lower side wall of the linkage protrusion (1120) is inclined. The pusher (12) includes a front side horizontally arranged abutment part (1210). The left and right sides of the abutment part (1210) are both bent backward to form clamping parts (1220). The inner side wall of the clamping part (1220) is recessed to form a clamping groove (1221). The linkage protrusion (1120) on each side is inserted into the clamping groove (1221) on the corresponding side. The lower side wall of the clamping groove (1221) is inclined.
13. The footrest device according to claim 12, characterized in that, The clamping part (1220) has a hook (1222) on the side wall facing away from the card block (11), and the second slide groove (1320) is a stepped structure that is wider inside and narrower outside.
14. The footrest device according to claim 11, characterized in that, A second elastic element (1130) is provided between the card block (11) and the second end cap (13), and the card head (1110) always tends to be inserted into the card hole (1010) under the elastic force of the second elastic element (1130).
15. A seating arrangement, characterized in that, Includes a seat (14) and a footrest as described in any one of claims 9-14, wherein the bottom of the seat (14) is provided with a chassis (1410) and the fixing tube (10) is provided on the side wall of the chassis (1410); in the stored state, the footrest (3) moves backward to fit against the bottom of the chassis (1410).