Child dining chair with pedal plate and dining chair seat height adjusting function

Abstract

The invention discloses a child dining chair capable of adjusting the height of a pedal plate and the height of a dining chair seat, the child dining chair comprises the dining chair seat, chair legs for supporting the dining chair seat and the pedal plate located at the chair legs, each chair leg comprises an inner pipe and an outer pipe, and the pedal plate is located on the inner side of the outer pipe; a first linkage mechanism is arranged in the pedal plate, a plurality of clamping holes matched with the first linkage mechanism are formed in the outer pipe, and the first linkage mechanism in an unlocked state is clamped with the clamping holes in the corresponding positions after moving up and down so as to adjust the height of the pedal plate; a second linkage mechanism is arranged between the outer pipe and the inner pipe, a plurality of clamping holes are formed in the outer pipe and staggered with the clamping holes, and the second linkage mechanism in an unlocked state drives the inner pipe to ascend and descend and then is clamped with the clamping holes in the corresponding positions, so that the height of the dining chair seat is adjusted. According to the dining chair, the height adjusting devices for the pedal and the dining chair seat are simultaneously assembled in the inner tube and the outer tube of the dining chair, and the two heights can be independently adjusted, so that multiple purposes are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of height adjustment of the dining chair seat and footrest of a children's dining chair, and particularly to a children's dining chair that simultaneously has height adjustment of the footrest and the dining chair seat. Background Art

[0002] Most of the existing footrests of children's dining chairs are fixed and cannot be adjusted in height to adapt to the heights of children of different ages. Although the improved version has a foldable structure, the stability of the footrest is not good and the stop structure of the footrest is relatively complex, or the state adjustment of the height and depth of the footrest needs to be completed by removing screws, making the height adjustment process cumbersome.

[0003] In specific use, it is also necessary to adjust the height of the dining chair in the children's dining chair to match the heights of different children. In the prior art, the structure with two height adjustments at the same time is complex and the overall cost is high. Summary of the Invention

[0004] The purpose of the present invention is to provide a children's dining chair that simultaneously has height adjustment of the footrest and the dining chair seat, which realizes the adjustment of both the dining chair seat and the footrest through the chair legs.

[0005] To achieve the above purpose, the present invention is realized through the following technical solutions.

[0006] A children's dining chair that simultaneously has height adjustment of the footrest and the dining chair seat includes a dining chair seat, chair legs supporting the dining chair seat, and a footrest located at the chair legs. The chair legs include an inner tube and an outer tube, and the footrest is located inside the outer tube; A first linkage mechanism is provided inside the footrest, and a number of clamping holes matching the first linkage mechanism are provided inside the outer tube. After the first linkage mechanism in the unlocked state moves up and down, it is clamped with the corresponding clamping holes to adjust the height of the footrest; A second linkage mechanism is provided between the outer tube and the inner tube. A number of clamping holes are provided inside the outer tube and are arranged in a dislocation manner with the clamping holes. The second linkage mechanism in the unlocked state drives the inner tube to lift and then is clamped with the corresponding clamping holes to adjust the height of the dining chair seat.

[0007] Further, the first linkage mechanism includes an assembly shell, and a first connecting piece and a first reset component that is linked with the first connecting piece and is arranged in a dislocation manner are provided inside the assembly shell.

[0008] Further, a driving shell linked with the first connecting piece is slidably provided inside the assembly shell. A first limiting shell for the movement of the driving shell is formed on one side of the assembly shell, and the first reset member is located between the first limiting shell and the driving shell.

[0009] Further, a reset gap is formed between the driving housing and the first limiting housing, and the fixing column fixedly connected to the first connecting member is located within the reset gap.

[0010] Further, a second limiting housing is formed on the other side of the assembly housing, and the clamping member located at the end of the first connecting member moves within the second limiting housing.

[0011] Further, it further includes a second reset assembly sleeved on the first connecting member and located within the second limiting housing, and the second reset assembly operates in a reverse state to the first reset assembly.

[0012] Further, it further includes a first unlocking mechanism linked to the first linkage mechanism, and the first unlocking mechanism unlocks or locks the first linkage mechanism and the outer tube after at least three force transmissions with the first linkage mechanism.

[0013] Further, the second linkage mechanism includes a second connecting member with two ends respectively connected to the second unlocking mechanism at the dining chair seat and the transition member within the outer tube, and the transition member is linked with a linkage member that locks or unlocks with the clamping hole.

[0014] Further, a linkage surface is provided at the bottom of the transition member. During the lifting or lowering of the second connecting member, the linkage surface drives the linkage member to rotate so that the clamping portion retracts or extends into the clamping hole.

[0015] Further, it further includes a sliding housing fixedly connected to the end of the inner tube and sliding along the outer tube. A central column is provided at the sliding housing, and the linkage member passing through the central column rotates around the central column along the sliding housing to pass through the perforation on the sliding housing and enter the clamping hole and then retract back into the sliding housing.

[0016] Further, a fixing member fixedly connected to the second connecting member and assembled within the transition member is provided at the top of the sliding housing, and the transition member is slidably arranged within the limiting cavity of the sliding housing.

[0017] Further, the second unlocking mechanism includes a mounting housing located at the dining chair seat. An unlocking groove is provided within the mounting housing, and the second connecting member controls the unlocking or locking of the linkage member during its movement along the unlocking groove.

[0018] Further, a second unlocking key is sleeved outside the mounting housing. During the up and down movement of the second unlocking key, it drives the second connecting member to move horizontally along the unlocking groove.

[0019] Further, the unlocking groove includes an inclined groove and a horizontal guiding groove. Pressing down the second unlocking key causes the second connecting member to enter from the top end of the inclined groove to the tail end and then slide into the horizontal guiding groove and move horizontally along the horizontal guiding groove.

[0020] Further, the footrest includes an upper plate and a lower plate that form an assembly cavity. A locking mechanism within the assembly cavity is configured to lock or unlock the slider, and the slider in the unlocked state drives the upper plate or the lower plate to move inward or outward.

[0021] Further, the locking mechanism includes a locking block linked to a locking member. A locking groove is provided on the slider, and the locking member drives the locking block to withdraw from or enter the locking groove during forward and backward movement.

[0022] Further, it further includes a third unlocking key that moves up and down along the footrest. The third unlocking key controls the horizontal movement of the unlocking mechanism during its up and down movement to control the unlocking or locking of the slider.

[0023] The beneficial effects of the present invention are as follows: In the present invention, through the structural arrangement within the dining chair, the footrest can be adjusted in height within the outer tube, while the dining chair seat can be adjusted in height within the inner coffin. The two do not interfere with each other, achieving the effect of synchronously realizing two height adjustments within one structure, reducing costs, and achieving a compact structure.

[0024] In the present invention, by providing a variety of unlocking mechanisms and locking mechanisms, the height adjustment of the children's dining chair, the individual adjustment of the footrest, and the width adjustment of the footrest are respectively completed, enabling the structure of the children's dining chair to have multiple adjustments, thereby meeting the needs of more customers. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of a children's dining chair provided by the present invention that simultaneously has height adjustment of the footrest and the dining chair seat; Figure 2 It is an assembly diagram of the first linkage mechanism and the first unlocking mechanism provided by the present invention; Figure 3 It is a schematic structural diagram of the first linkage mechanism provided by the present invention; Figure 4 It is an exploded view of the first linkage mechanism provided by the present invention; Figure 5 It is a schematic structural diagram of the footrest and the first unlocking mechanism provided by the present invention; Figure 6 It is an exploded view of the second unlocking mechanism provided by the present invention; Figure 7 It is a schematic structural diagram of the second unlocking mechanism in the locked state provided by the present invention; Figure 8 It is a schematic structural diagram of the second unlocking mechanism in the unlocked state provided by the present invention; Figure 9 It is an assembly diagram of the second linkage mechanism provided by the present invention; Figure 10Schematic structural diagram of the locking mechanism provided by the present invention; Figure 11 Schematic structural diagram of the locking mechanism in the locked state provided by the present invention; Figure 12 Schematic structural diagram of the locking mechanism in the unlocked state provided by the present invention; Figure 13 Assembly drawing of the locking mechanism provided by the present invention; In the figure: 100, dining chair seat; 200, chair legs; 210, inner tube; 220, outer tube; 221, clamping hole; 222, clamping connection hole; 300, footrest; 310, upper plate; 311, slider; 312, locking groove; 320, lower plate; 321, sliding groove; 400, first linkage mechanism; 410, assembly shell; 420, first connecting piece; 421, fixing column; 422, clamping piece; 430, first reset assembly; 440, driving shell; 450, first limiting shell; 460, reset gap; 470, second limiting shell; 480, second reset assembly; 500, second linkage mechanism; 510, transition piece; 511, linkage surface; 520, second connecting piece; 530, linkage piece; 531, clamping portion; 540, sliding shell; 541, central column; 542, fixing piece; 543, limiting cavity; 600, first unlocking mechanism; 610, first unlocking shell; 620, first unlocking key; 700, second unlocking mechanism; 710, second unlocking key; 720, mounting shell; 730, unlocking groove; 800, locking mechanism; 810, locking piece; 811, assembly groove; 812, linkage block; 820, locking block; 830, third unlocking key; 840, second unlocking shell. Detailed implementation manners

[0026] The present invention will be described in detail below with reference to the embodiments shown in the drawings. It should be noted that these embodiments are not intended to limit the present invention, and any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present invention.

[0027] Embodiment 1 Referring to the attached Figures 1-13 As shown, the children's dining chair in this embodiment that simultaneously has height adjustment of the footrest and the dining chair seat includes a dining chair seat 100, chair legs 200 supporting the dining chair seat 100, and a footrest 300 located at the chair legs 200. Specifically, the chair legs 200 are of a telescopic structure, specifically including an inner tube 210 and an outer tube 220. The relative movement of the inner tube 210 and the outer tube 220 can adjust the overall height. The footrest 300 is located inside the outer tube 220 for overall assembly, that is, two chair legs are symmetrically arranged, and then the footrest is arranged between the two chair legs.

[0028] In order to complete the height adjustment of the foot pedal 300, a first linkage mechanism 400 is provided in the foot pedal 300, and then a plurality of positioning holes 221 matching the first linkage mechanism 400 are provided in the outer tube 220. The first linkage mechanism 400 in this embodiment can be unlocked or locked. After the first linkage mechanism 400 in the unlocked state moves up and down, it is clamped with the positioning holes 221 at the corresponding position to adjust the height of the foot pedal 300, and then locked after the height is adjusted; for example, after unlocking, it is raised or lowered and then locked to complete the height adjustment of the foot pedal 300.

[0029] In this embodiment, in order to complete the adjustment of the dining chair seat 100, the height between the inner and outer tubes is adjusted. Specifically, a second linkage mechanism 500 is provided between the outer tube 220 and the inner tube 210. Then, in order to avoid mutual interference with the height adjustment of the foot pedal 300, a plurality of engaging holes 222 are provided in the outer tube 220 in a staggered manner with the engaging holes 221. The second linkage mechanism 500 can also be unlocked or locked. When in the unlocked state, the second linkage mechanism 500 is linked, and the inner tube 210 is driven to rise and fall and engage with the engaging holes 222 at the corresponding position to adjust the height of the dining chair seat 100, and then locked.

[0030] In this embodiment, two height adjustment linkage mechanisms are installed between the inner and outer tubes, which can independently or simultaneously complete the height adjustment of the footrest and the dining chair seat, killing two birds with one stone and having a compact structure, especially the footrest with a smaller structure. In this embodiment, the separate height adjustment of the children's dining chair and the height adjustment of the footrest are completed, making it more widely applicable.

[0031] Embodiment 2 In this embodiment, the entire control of the first linkage mechanism is mainly introduced.

[0032] See attached Figures 2-4 As shown, the first linkage mechanism 400 includes an assembly shell 410, in which a first connector 420 and a first reset assembly 430 that is staggered and linked to the first connector 420 are arranged. The foot pedal 300 is connected to the outer tube 220 through the first connector 420, and the staggered arrangement of the first reset assembly 430 and the first connector saves space, but it can be linked to complete the reset of the first connector 420 after unlocking, and then the first connector 420 and the outer tube 220 can be locked after being assembled.

[0033] To guide the movement of the first connecting member 420 within a set space, a driving housing 440 is slidably disposed within the assembly housing 410. Then, the driving housing 440 is linked with the first connecting member 420. The driving housing 440 moves along the first limiting housing 450 within the assembly housing 410. During this process, the first connecting member 420 will also perform a horizontal movement. To achieve the subsequent reset of the driving housing 440, a first reset assembly 430 is provided between the driving housing 440 and the end of the first limiting housing 450 close to the outer tube 220. After the driving housing 440 compresses the first reset assembly 430, it can be reset subsequently. In this embodiment, the movement of the driving housing is utilized to indirectly control the first connecting member. At this time, the first limiting housing can also form partial protection for the first connecting member on the side.

[0034] To achieve the stable connection of the first connecting member 420, a reset gap 460 can be formed between the driving housing 440 and the first limiting housing 450. The reset gap 460 is partially misaligned with the driving housing 440. Then, the fixing column 421 fixedly connected to the first connecting member 420 is located within the reset gap 460. At this time, the fixing column 421 is movably assembled within the reset gap. When the driving housing moves along the assembly housing, it drives the first connecting member to perform a horizontal movement along the assembly housing, completing approaching or moving away from the outer tube.

[0035] To ensure the stable movement of the first connecting member 420 during the disengagement and approaching from the outer tube 220, a second limiting housing 470 is formed on the other side of the assembly housing 410. The clamping member 422 at the end of the first connecting member 420 moves within the second limiting housing 470. Thus, the movement of both ends of the first connecting member 420 will be restricted, avoiding deviating from the preset movement track.

[0036] At this time, to complete the reset, a second reset assembly 480 sleeved on the first connecting member 420 and located within the second limiting housing 470 is further included. The second reset assembly 480 is in a reverse working state with the first reset assembly 430, thereby enabling the first connecting member 420 to have a corresponding movement process.

[0037] To cooperate with manual control, a first unlocking mechanism 600 for locking the first linkage mechanism 400 to prevent the first connecting member from moving randomly is added. At this time, for aesthetics and structural symmetry, two first linkage mechanisms 400 can be provided. Thus, the first unlocking mechanism 600 can synchronously control the two first linkage mechanisms 400. Specifically, the first unlocking mechanism 600 unlocks or locks the first linkage mechanism 400 and the outer tube 220 after at least three force transmissions with the first linkage mechanism 400.

[0038] Refer to the appendix Figure 4As shown, the first unlocking mechanism 600 includes a first unlocking housing 610 and a first unlocking key 620 linked to the first unlocking housing 610. During the backward movement of the first unlocking key 620, due to the existence of the linked inclined surface, the first unlocking key 620 is urged to move upward. Then, inclined surfaces driven by the driving housing 440 of the first linkage mechanism 400 are provided on both sides of the first unlocking key 620, causing the two first linkage mechanisms 400 to move in opposite directions and approach the two outer tubes 220 on both sides respectively to complete unlocking. During locking, the two first linkage mechanisms 400 move towards each other, squeezing the first unlocking key 620 in the first unlocking mechanism 600 to move downward, thereby urging the first unlocking housing assembled and linked with it to move backward and then forward to complete locking.

[0039] The control movement process of the first linkage mechanism is as follows: Taking the first linkage mechanism 400 on the left side of the first unlocking mechanism 600 as an example for introduction, the principle on the right side is the same as that on the left side, except that the movement direction is opposite.

[0040] When the first unlocking key 620 is pressed, the driving housing 440 in the first linkage mechanism 400 moves towards the left along the bottom of the assembly housing 410. At this time, the fixing column 421 also moves towards the left along the reset gap 460 to the rightmost end of the reset gap, and the first reset assembly 430 in the driving housing 440 is compressed. At this time, the first connecting member 420 moves towards the left. For the first connecting member 420, such as a steel wire rope, due to the law of conservation of kinetic energy, when the left side is free at this time, the other end of the steel wire must generate kinetic energy to the right to offset the kinetic energy on the left side. Furthermore, the side of the first connecting member close to the outer tube moves towards the driving housing, that is, the two ends of the first connecting member 420 move towards each other, causing the first connecting member 420 to be pulled out of the positioning hole 221.

[0041] In this embodiment, a positioning member 422 corresponding to the positioning hole 221 can be provided at the end of the first connecting member 420. The engaging portion and the positioning portion are connected in a manner similar to engagement, and then pulling can achieve disengagement. When the height of the first linkage mechanism 400 needs to be fixed after adjustment, the two first linkage mechanisms 400 and the first unlocking mechanism 600 are synchronously moved up and down to the set height, and then the positioning member is pulled to insert it into the positioning hole at the corresponding height to complete the locking and fixing of the first linkage mechanism 400.

[0042] Embodiment Three In this embodiment, the height adjustment of the dining chair seat is introduced.

[0043] Refer to the appendix Figures 5-9As shown, in order to complete the height adjustment of the dining chair seat 100, two second linkage mechanisms 500 are symmetrically arranged. A retaining shell is formed on the outer periphery of the dining chair seat 100, and a second unlocking key 710 inclined thereto is arranged in the space of the retaining shell. At the same time, the retaining shell extends downward to the height direction of the chair legs, and then two symmetric second linkage mechanisms 500 are arranged on both sides.

[0044] Furthermore, the second linkage mechanism 500 includes a second connecting member 520 with two ends respectively connected to the second unlocking mechanism 700 at the dining chair seat 100 and the transition member 510 in the outer tube 220. The transition member 510 is linked with a linkage member 530 that locks or unlocks with the clamping hole 222. At this time, the transition member 510 controls the linkage member 530, and further completes the control of whether the second connecting member 520 moves, that is, completes the unlocking or locking of the entire second linkage mechanism 500. When it is locked and inserted into the clamping hole 222, it cannot be linked, otherwise, the height of the entire chair leg can be controlled by linkage.

[0045] In this embodiment, since the entire chair leg is relatively long, the advantage of the relatively long length can be fully utilized, and each structure is arranged along the length direction. The linkage can be arranged at the bottom. For example, a linkage surface 511 is provided at the bottom of the transition member 510. During the lifting or lowering of the second connecting member 520, the linkage surface 511 drives the linkage member 530 to rotate so that the clamping portion 531 retracts or extends into the clamping hole 222, and thus the entire linkage is completed through the linkage surface 511.

[0046] Referring to the attached drawings, in this embodiment, it specifically further includes a sliding shell 540 fixedly connected to the end of the inner tube 210 and sliding along the outer tube 220. At this time, the entire sliding shell 540 drives the entire linkage mechanism to slide in the outer tube 220 and drives the inner tube 210 to move up and down. In order to complete the rotation and adjust the linkage direction, a central column 541 is provided at the sliding shell 540. The linkage member 530 passing through the central column 541 rotates around the central column along the sliding shell and enters the clamping hole 222 through the through hole on the sliding shell and then retracts back into the sliding shell 540.

[0047] In this embodiment, a fixing member 542 fixedly connected to the second connecting member 520 and assembled in the transition member 510 is provided at the top of the sliding shell 540. The transition member 510 is slidably arranged in a limiting cavity 543 in the sliding shell 540. At this time, a return spring is provided at both the fixing member and the clamping portion, which is convenient for the reset after being driven by an external force.

[0048] In this embodiment, to avoid accidental unlocking, the second unlocking mechanism 700 is arranged on the side of the dining chair seat 100. When unlocking, it approaches or moves away from the hand-held part of the dining chair seat along the inclined plane direction. Thus, the user can perform the unlocking control by moving downward at the hand-held part. However, in this process, since part of the second unlocking mechanism 700 is hidden and not easily noticed, the accidental operations of children and the like are reduced.

[0049] Furthermore, the second unlocking mechanism 700 includes a mounting shell 720 located at the dining chair seat 100. An unlocking groove 730 is provided in the mounting shell 720. The second connecting member 520 controls the unlocking or locking of the linkage member during its movement along the unlocking groove 730. At this time, through the setting of the unlocking groove in the mounting shell, the fixed structure connecting the second connecting member can directly perform corresponding movements along the unlocking groove.

[0050] For variation and control, the second unlocking key 710 is sleeved outside the mounting shell 720. When the second unlocking key 710 moves up and down, it drives the second connecting member 520 to move horizontally along the unlocking groove 730.

[0051] Specifically, the unlocking groove 730 includes an inclined groove and a horizontal guiding groove. Pressing down the second unlocking key 710 causes the second connecting member 520 to enter the tail end from the top of the inclined groove and then slide into the horizontal guiding groove and move horizontally along the horizontal guiding groove. In the above process, by pressing the second unlocking key 710, it moves towards the upper left, driving the cylindrical member fixedly connected to the second connecting member 520 to be forced to move to the right in the plastic groove (i.e., the unlocking groove). At this time, the second connecting member 520 moves upward, linking the fixed member 542 and the linkage surface 511, and driving the engaging portion 531 to enter the groove to complete the unlocking.

[0052] In this embodiment, the cylindrical member fixedly connected with the second connecting member 520 can be installed between the mounting shell 720 and the unlocking groove 730. During use, the second unlocking key 710 holds the entire unlocking groove 730. When the second unlocking key 710 is pressed, the unlocking groove 730 also moves towards the upper left synchronously, causing the cylindrical member to move to the right along the unlocking groove. The cylindrical member drives the second connecting member 520 to enter the horizontal guiding groove from the inclined groove.

[0053] The control process in this embodiment is as follows: When the user presses down the second unlocking key 710, the first end of the second connecting member 520 is driven to enter the horizontal guiding groove from the inclined groove, completing the horizontal backward movement along the seat of the dining chair. Furthermore, the second connecting member 520 is equivalently lifted. At this time, the second end of the second connecting member 520 is lifted along the sliding housing 540, driving the entire transition member 510 to move upward as well. During the movement, the linkage surface at the bottom of the transition member triggers the linkage member 530, causing it to rotate along the central column. During the rotation, the linkage member 530 rotates near the inner side of the outer tube 220 away from the side of the clamping hole 222, thereby driving the clamping portion 531 to disengage from the outer tube. The return spring near the clamping portion and the return spring located between the transition member 510 and the sliding housing 540 are compressed. At this time, during the lifting and lowering of the inner tube 210, the sliding housing 540 fixedly connected thereto is driven to move up and down, and thus the second connecting member 520 is indirectly driven to move as well. At this time, the unlocking button is reset, and then the first end of the second connecting member 520 is reset from the horizontal guiding groove to the inclined groove.

[0054] When the inner tube is lifted and lowered to the set height, the second connecting member 520 and the inner tube 210 are no longer under force. The return spring near the clamping portion and the return spring located between the transition member and the sliding housing are reset. The clamping portion is reset into the clamping hole at the set height, and the second end of the second connecting member is pulled downward, and the linkage member rotates in the reverse direction at the same time, completing automatic locking.

[0055] Embodiment 4 Refer to the attached Figures 10-12 As shown, in this embodiment, on the basis of Embodiment 1, the width adjustment of the footrest 300 in the front-rear direction is further elaborated.

[0056] In this embodiment, the footrest 300 includes an upper plate 310 and a lower plate 320 that form an assembly cavity. The locking mechanism 800 in the assembly cavity is used to lock or unlock the slider 311, and the unlocked slider 311 drives the upper plate or the lower plate to move inward or outward.

[0057] Specifically, the locking mechanism 800 in this embodiment includes a locking block 820 linked with a locking member 810. A locking groove 312 is provided on the slider 311. When the locking member 810 moves back and forth, it drives the locking block 820 to withdraw from or enter the locking groove 312.

[0058] In order to complete unlocking, it further includes a third unlocking key 830 that moves up and down along the footrest 300. The third unlocking key 830 controls the horizontal movement of the unlocking mechanism during its up and down movement, controlling the unlocking or locking of the slider 311.

[0059] In this embodiment, specifically in the upper plate 310 and the lower plate 320, one is provided with a sliding groove 321, and the other is provided with a sliding block 311 that moves along the sliding groove 321. In this embodiment, taking the sliding groove 321 being provided on the lower plate and then the sliding block 311 being provided on the upper plate 310 as an example for introduction, a plurality of sliding blocks 311 can be provided. Since the entire pedal 300 is relatively small, a plurality of sliding grooves 321 can be provided on the lower plate 320. Then, during driving, the plurality of sliding blocks 311 move along the sliding grooves 321, driving the upper plate 310 to move inwards or outwards in the horizontal direction along the lower plate 320. In order to reduce the driving mechanism for controlling the sliding block and ensure that the entire upper plate is driven to slide rather than partially slide, a plurality of sliding blocks 311 can be evenly arranged at corresponding positions on the upper plate. Then, the plurality of sliding blocks are assembled on an assembly plate, and the assembly plate is fixed on the upper plate by screws or the like. At this time, only one sliding block needs to be driven to slide to drive all the sliding blocks to move, ensuring the overall movement of the upper plate. The sliding groove in this embodiment is arranged along the width direction of the pedal.

[0060] In this embodiment, in order to control the sliding block to slide under set conditions, a locking mechanism 800 is provided. The locking mechanism 800 is arranged in the assembly cavity between the upper and lower plates. Then, during the movement of the locking mechanism 800 along the upper plate, it is controlled such that the sliding block 311 is locked or unlocked in the corresponding sliding groove 321 on the lower plate. Then, when the sliding block 311 is in the unlocked state, the sliding block 311 is driven to move, driving the upper plate to slide, so that the upper plate moves inwards or outwards, adjusting the front and rear positions of the upper plate, and increasing the width of the pedal formed by the upper and lower plates together. Of course, if it moves inwards, it can also be understood as increasing the depth of the pedal.

[0061] For the specific locking mechanism 800, it includes a locking member 810 arranged along the width direction of the pedal 300, locking blocks 820 arranged on both sides of the locking member 810 and linked with the locking member. A locking groove 312 is provided on the sliding block 311. When the sliding block 311 stops moving, the locking block 820 enters the corresponding locking groove 312 to complete the locking after width adjustment.

[0062] In this embodiment, during all unlocking and locking processes, the locking mechanism and the sliding block move in the horizontal direction. This direction of movement meets the special requirement of the small vertical assembly space inside the pedal, enabling the core movement and control to occur in the horizontal direction and being able to adapt to the requirement of limited height in the vertical direction.

[0063] In this embodiment, the slider is partially recessed to form a locking groove. Once the locking mechanism enters the locking groove, the slider is restricted from moving, thereby achieving locking. Once the locking mechanism is separated from the locking groove at the slider, the slider is not restricted and can move forward and backward along the sliding groove to adjust the width of the pedal. In this process, the slider is controlled by the mutual restriction of the locking mechanism and the locking groove in the slider.

[0064] In order to facilitate user operation, in this embodiment, the third unlocking key is set below the foot pedal 300, and the unlocking key has the possibility of moving up and down. Specifically, the third unlocking key directly acts on the locking mechanism through the setting of the inclined surface, and then in the assembly cavity, in the narrow space range along the front-to-back direction, it generates at least two force transmissions, and then the force acts on the slider to complete the disengagement of the unlocking mechanism from the locking groove, so that the slider can move normally after being unlocked. Since the thickness and width of the foot pedal itself are relatively small, it is necessary to fully consider the unlocking and other controls in such a small space. In this embodiment, the layout and structure of the mechanical structure are cleverly used to complete the relevant unlocking settings.

[0065] The specific force transmission process is as follows: the third unlocking key 830 located below the foot pedal moves in the vertical direction after receiving the force. Since the third unlocking key 830 is formed with an inclined surface facing inward in the front-back direction, it moves upward, which prompts the locking member to move inward, and the locking blocks on both sides of the locking member move away from each other. Then, during the entire unlocking process, the movement direction is changed from the height direction to the horizontal direction, and then the horizontal direction is adjusted to multiple two-direction movements, so that multiple directions of movement are formed in the assembly space. In this embodiment, since the foot pedal is small in size, and thus the force transmission is more, this embodiment cleverly uses the third unlocking key 830 to control the locking mechanism, so that it generates the above-mentioned two force transmissions in a small space. Especially in a children's dining chair, the entire foot pedal occupies a small volume. At this time, the accommodating movement grooves are distributed in multiple directions to decompose the force and improve efficiency. In this embodiment, the narrow space specifically refers to the small volume of the entire foot pedal, and the cavity space located in each force transmission is also small. In this embodiment, a reset spring is also provided in the third unlocking key, which will drive the key to reset after being pressed, and also includes a second unlocking shell 840 for assembling the reset spring and the third unlocking key.

[0066] The detailed description of the locking mechanism in this embodiment is as follows: In this embodiment, the third unlocking key 830 forms a first guiding surface near the locking mechanism, and a first inclined surface matching it is provided on the locking mechanism. At this time, the first guiding surface is an inclined surface that slopes upward from the inside to the outside. For example, an inclined surface between 40° and 60° can be selected, and then the first inclined surface is parallel to it. When the first guiding surface moves upward, it forces the first inclined surface to move inward in the horizontal direction, driving the locking mechanism to start driving movement.

[0067] Regarding the locking mechanism, an assembly groove 811 is formed at the end of the locking member 810 away from the third unlocking key 830. The assembly grooves 811 are connected by a reset member, and the reset member is linked with two locking blocks 820. Thus, during the forward and backward movement of the locking member 810, the two locking blocks 820 move away from each other to stretch the spring or move closer to each other for spring reset.

[0068] For a clever setting, second guiding surfaces are symmetrically arranged at the top of the assembly groove 811. Linking blocks 812 connected by a reset member inside the assembly operation are also symmetrically arranged in the assembly groove. A second inclined surface that matches the second guiding surface and drives the linking block to move inward is formed on the linking block 812. At this time, due to the limited structure of the linking member and its insufficient width, if the locking member 810 and the locking block 820 are in direct contact, the entire driving contact distance is short. Thus, the linking block 812 can be added. During the movement of the locking member 810, the assembly groove 811 also moves. In this embodiment, the width of the entire assembly groove gradually increases near the inner side. Then, the locking member 810 drives the assembly groove to move inward, and the width that can accommodate the linking block becomes narrower and narrower. At this time, the two linking blocks move closer to each other, compressing the reset spring. The reset spring is connected to the locking block, driving the locking block 820 to move inward toward each other to complete unlocking.

[0069] In this embodiment, to better complete the assembly of the locking mechanism, a T-shaped groove body matching the locking member 810 is provided in the assembly cavity between the upper and lower plates. The end of the T-shaped groove body extends to form a trapezoidal groove that partially accommodates the second guiding surface. At this time, the setting of the trapezoidal groove enables the second guiding surface to extend into the trapezoidal groove when the locking member moves inward to complete the assembly.

[0070] Or a trapezoidal groove is directly recessed near the driving member on the linking member, and the driving member enters or moves away from the trapezoidal groove during movement.

[0071] At this time, the inclined surface on the trapezoidal groove is partially attached to the second guiding surface. Thus, during the movement of the second guiding surface, it is attached not only to the linking member but also to the inclined surface of the trapezoidal groove.

[0072] In this embodiment, a great number of grooves are provided in the upper and lower plates, enabling various structures to be arranged in corresponding grooves, thus achieving good limit and assembly stability. For example, corresponding grooves are provided for the linkage member, the slider, and the driving member, allowing them to move within the range defined by the grooves, ensuring that during the unlocking or locking process, they move along the path defined by the grooves, avoiding deviation and improving the overall unlocking or locking efficiency.

[0073] Currently, children's dining chairs can only be used as dining chairs and cannot adjust the height and depth of the footrest in various usage scenarios and with the growth of children's height and age. They should have diverse functions, so there is still a problem of single usage function. However, the technology in this embodiment perfectly solves the above technical problems.

[0074] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation manners of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent implementation manners or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

[0075] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any perspective, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0076] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A children's dining chair with both a footrest and a height-adjustable dining chair seat, comprising a dining chair seat, a chair leg supporting the dining chair seat, and a footrest located at the chair leg, characterized in that: The chair leg comprises an inner tube and an outer tube, and the footrest is located inside the outer tube; A first linkage mechanism is provided in the foot pedal, and a plurality of locking holes matching the first linkage mechanism are provided in the outer tube. The first linkage mechanism in the unlocked state moves up and down and locks with the locking holes at corresponding positions to adjust the height of the foot pedal; A second linkage mechanism is provided between the outer tube and the inner tube, and a plurality of engaging holes are provided in the outer tube in a staggered manner with the engaging holes. The second linkage mechanism in an unlocked state drives the inner tube to rise and fall and engage with the engaging holes at corresponding positions to adjust the height of the dining chair seat.

2. The children's dining chair with both footrest and seat height adjustment according to claim 1, characterized in that: The first linkage mechanism comprises an assembly shell, in which a first connecting member and a first resetting component which is linked with the first connecting member and arranged in a staggered manner are arranged.

3. The children's dining chair with both footrest and seat height adjustment according to claim 2, characterized in that: A driving shell linked with the first connecting member is slidably disposed in the assembly shell, a first limiting shell for driving shell movement is formed on one side of the assembly shell, and the first reset member is located between the first limiting shell and the driving shell.

4. The children's dining chair with both footrest and seat height adjustment according to claim 3, characterized in that: A reset gap is formed between the driving shell and the first limiting shell, and a fixing column fixedly connected to the first connecting member is located in the reset gap.

5. The children's dining chair with both footrest and seat height adjustment according to claim 3, characterized in that: A second limiting shell is formed on the other side of the assembly shell, and the locking member located at the end of the first connecting member moves in the second limiting shell.

6. The children's dining chair with both footrest and seat height adjustment according to claim 5, characterized in that: It also includes a second reset component which is sleeved on the first connecting member and located in the second limiting shell, and the second reset component has the same working state as the first reset component.

7. The children's dining chair with both footrest and seat height adjustment according to any one of claims 1 to 6, characterized in that: It also includes a first unlocking mechanism linked with the first linkage mechanism, and the first unlocking mechanism and the first linkage mechanism are unlocked or locked with the outer tube after at least three force transmissions between the first unlocking mechanism and the first linkage mechanism.

8. The children's dining chair with both footrest and seat height adjustment according to claim 1, characterized in that: The second linkage mechanism includes a second connecting piece whose two ends are respectively connected to the second unlocking mechanism at the dining chair seat and the transition piece in the outer tube, and the transition piece is linked with a linkage piece that is locked or unlocked with the clamping hole.

9. The children's dining chair with both footrest and seat height adjustment according to claim 8, characterized in that: A linkage surface is provided at the bottom of the transition piece. When the second connecting piece is lifted or lowered, the linkage surface drives the linkage piece to rotate so that the clamping portion retreats or extends into the clamping hole.

10. The children's dining chair with both footrest and seat height adjustment according to claim 9, characterized in that: It also includes a sliding shell fixedly connected to the end of the inner tube and sliding along the outer tube. The sliding shell is provided with a central column. The linkage member passing through the central column rotates along the sliding shell with the central column as the center to pass through the through hole on the sliding shell and enter the snap-fit ​​hole to be dragged back into the sliding shell.

11. The children's dining chair with both footrest and seat height adjustment according to claim 8, characterized in that: A fixing member fixedly connected to the second connecting member and assembled in the transition member is provided on the top of the sliding shell. The transition member is slidably arranged in the limiting cavity in the sliding shell.

12. The children's dining chair with both footrest and seat height adjustment according to claim 8, characterized in that: The second unlocking mechanism comprises a mounting shell located at the seat of the dining chair, wherein an unlocking slot is arranged in the mounting shell, and the second connecting member controls the linkage member to unlock or lock when moving along the unlocking slot.

13. The children's dining chair with both footrest and seat height adjustment according to claim 12, characterized in that: The outer sleeve of the mounting shell is provided with a second unlocking key, and the second unlocking key drives the second connecting member to move horizontally along the unlocking groove when the second unlocking key moves up and down.

14. The children's dining chair with both footrest and seat height adjustment according to claim 13, characterized in that: The second unlocking slot includes an oblique slot and a horizontal guide slot. Pressing the unlocking key downward causes the second connecting member to enter the tail end from the top of the oblique slot and then slide into the horizontal guide slot, and then move horizontally along the horizontal guide slot.

15. The children's dining chair with both footrest and seat height adjustment according to any one of claims 1-6 or 8-14 or 7, characterized in that: The foot pedal comprises an upper plate and a lower plate forming an assembly cavity. The locking mechanism in the assembly cavity is used to lock or unlock the slider, and enables the slider in the unlocked state to drive the upper plate or the lower plate to move inward or outward.

16. The children's dining chair with both footrest and seat height adjustment according to claim 15, characterized in that: The locking mechanism comprises a locking block linked with the locking member, and a locking groove is arranged on the sliding block, and the locking member drives the locking block to exit or enter the locking groove when moving forward and backward.

17. The children's dining chair with both footrest and seat height adjustment according to claim 15, characterized in that: It also includes a third unlocking key which moves up and down along the foot pedal. The third unlocking key controls the horizontal movement of the unlocking mechanism during the up and down movement, thereby controlling the slider to unlock or lock.

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