Height-adjustable baby walker

Abstract

The utility model provides a child walker with adjustable height, and relates to the field of walkers, the child walker comprises an upper frame, a lower frame, a gear and a rack, the upper frame is arranged above the lower frame, the upper frame is connected with the lower frame, and the upper frame can ascend and descend; the rack is vertically arranged and fixedly arranged at the bottom of the upper frame; a gear is rotationally installed on the lower frame, and one side of the gear is meshed with the rack in a transmission mode. According to the height-adjustable baby walker, the height of the upper walker frame can be adjusted through a gear and rack structure, the use requirements of children in different height stages can be met, and the baby walker does not need to be replaced in the growth stage of the children.

Description

Technical Field

[0001] This utility model belongs to the field of baby walkers, specifically relating to a height-adjustable baby walker. Background Technology

[0002] Baby walkers are assistive tools for children before they learn to walk. They are designed to provide children with ease of movement and help them develop balance and coordination before learning to walk independently. A baby walker typically consists of a chassis frame and a seat. The chassis frame supports the entire walker, ensuring stability. The seat is where the baby sits and is designed to be comfortable for extended use. The wheels at the bottom help the baby glide easily, reducing the burden on their walking and helping them improve their balance, laying the foundation for future independent walking.

[0003] Children in their growth period grow rapidly, and existing baby walkers do not have height adjustment functions, making them unable to adapt to changes in children's height. Utility Model Content

[0004] The present invention aims to provide a height-adjustable baby walker that can be used by children of different heights, solving the problem of needing to frequently replace baby walkers due to rapid changes in children's height during their growth stages.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a height-adjustable children's walker, comprising:

[0006] Unframed;

[0007] An upper frame is disposed above the lower frame, the upper frame is connected to the lower frame, and the upper frame is capable of being raised and lowered;

[0008] A rack, vertically mounted and fixed to the bottom of the upper frame; and

[0009] A gear is rotatably mounted on the lower frame, and one side of the gear meshes with the rack and pinion drive.

[0010] In this embodiment, the height of the upper frame can be adjusted by a gear and rack structure, which can meet the usage needs of children at different height stages, eliminating the need to replace the walker during the child's growth stage.

[0011] In one embodiment, a worm gear is rotatably mounted on the lower frame, and the worm gear is fixedly connected to the gear for driving the gear to rotate; and

[0012] The worm gear meshes with the worm wheel drive.

[0013] In one embodiment, the height-adjustable baby walker further includes:

[0014] The housing is fixed on the lower frame. Worm holes are provided on both the left and right sides of the housing. The two ends of the worm are rotatably installed in the worm holes through bearings. The worm wheel shaft is rotatably installed on the front side wall of the housing. An opening for the rack to extend is provided on the top of the housing.

[0015] In one embodiment, the height-adjustable baby walker further includes:

[0016] A pair of mounting brackets are fixedly mounted on the lower frame, and each of the two mounting brackets has a sliding groove on one opposite side; and

[0017] The sliding frame is slidably installed in the two sliding grooves on both sides, and the sliding frame is fixedly connected to the upper frame.

[0018] In one embodiment, the mounting frame is provided with a plurality of vertically arranged first limiting saw teeth, all of which are located on the side of the mounting frame near the sliding frame, and the top surfaces of the first limiting saw teeth are all horizontally arranged.

[0019] The height-adjustable baby walker also includes:

[0020] The first mounting component is fixedly mounted on the end face of the sliding frame near the first limiting sawtooth; the second mounting component is fixedly mounted on the sliding frame below the first mounting component.

[0021] An elastic sheet is fixedly mounted on the second mounting component. Both ends of the elastic sheet extend toward the two first limiting saw teeth, and wedge-shaped limiting blocks are formed at both ends of the elastic sheet.

[0022] A pair of limiting members are symmetrically arranged on both sides of the first mounting member. The top of both limiting members is hinged to the sliding frame, and the bottom is provided with a slot that matches the first limiting serration. The middle of each limiting member is provided with a limiting pin that matches the wedge-shaped limiting block.

[0023] A pair of return springs are symmetrically fixed on both sides of the first mounting member and are respectively connected to the two limiting members.

[0024] In this embodiment, a serrated structure and a limiting component are used together to form an auxiliary limit, which enhances the stability of the upper frame and ensures the safety and reliability of the walker.

[0025] In one embodiment, a second limiting saw tooth is provided above the first limiting saw tooth, and the distance between the two second limiting saw teeth is less than the distance between the two first limiting saw teeth.

[0026] In one embodiment, a base plate is fixed between the mounting brackets, the base plate being located below the first limiting saw teeth, and a pair of top rods are mounted on the base plate.

[0027] In one embodiment, baffles are fixed to the front and rear sides of the two mounting brackets.

[0028] In one embodiment, the height-adjustable baby walker further includes:

[0029] A pair of connecting components are installed on both sides of the lower frame;

[0030] The connection component includes:

[0031] The first limiting slide bar is fixedly mounted on the lower frame;

[0032] The first slider is slidably connected to the first limiting slider.

[0033] The first link is hinged at the top to the upper frame and at the bottom to the first slider;

[0034] The second limiting slide bar is fixedly mounted on the upper frame;

[0035] The second slider is slidably connected to the second limiting slider; and

[0036] The second link is hinged at the top to the second slider and at the bottom to the lower frame.

[0037] In one embodiment, the connection component further includes:

[0038] A first U-shaped plate is fixedly mounted on the bottom of the upper frame. The first U-shaped plate has two first side plates, and the top end of the first connecting rod is located between the two first side plates and hinged to the first U-shaped plate.

[0039] The second U-shaped plate is fixedly mounted on the lower frame. The second U-shaped plate has two second side plates, and the bottom end of the second connecting rod is located between the two second side plates and is hinged to the second U-shaped plate. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of the height-adjustable children's walker of this utility model. Figure 1 ;

[0041] Figure 2 This is a schematic diagram of the structure of the height-adjustable children's walker of this utility model. Figure 2 (Concealing the first link, second link, and baffle on one side);

[0042] Figure 3 This is a schematic diagram of the structure of the height-adjustable children's walker of this utility model. Figure 3 (Concealing the first and second links and part of the box on one side);

[0043] Figure 4 This is a schematic diagram of the structure of the height-adjustable children's walker of this utility model. Figure 4 ;

[0044] Figure 5 This is a schematic diagram of the structure of the height-adjustable children's walker of this utility model. Figure 5 (Concealed worm gear, worm, gear, rack and pinion and auxiliary limiting structure);

[0045] Figure 6 This is a schematic diagram of the transmission structure of the worm gear and rack of this utility model;

[0046] Figure 7 This is a schematic diagram of the auxiliary limiting structure of this utility model. Figure 1 ;

[0047] Figure 8 This utility model Figure 7 Enlarged view of part A in the middle;

[0048] Figure 9 This is a schematic diagram of the auxiliary limiting structure of this utility model. Figure 2 ;

[0049] Figure 10 This utility model Figure 9 A magnified view of part B in the middle.

[0050] Explanation of reference numerals in the attached figures:

[0051] 100-Upper frame;

[0052] 201-Rack; 202-Handle; 203-Box; 204-Worm Gear; 205-Gear; 206-Worm;

[0053] 300-Underframe;

[0054] 401-First connecting rod; 402-Second connecting rod; 403-Second limiting slide bar; 404-Second slider; 405-First U-shaped plate; 406-First limiting slide bar; 407-First slider; 408-Second U-shaped plate;

[0055] 501-Mounting bracket; 502-Baffle; 503-Limiting component; 5031-Limiting pin; 504-First limiting serration; 505-Second limiting serration; 506-Sliding bracket; 507-Return spring; 508-Elastic sheet; 5081-Wedge-shaped limiting block; 509-Push rod; 510-First mounting component; 511-Second mounting component;

[0056] 600-Handrail. Detailed Implementation

[0057] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0058] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0059] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on the present invention.

[0060] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0061] Please refer to the attached document as well. Figure 1 and attached Figure 2 The present invention provides a height-adjustable baby walker. The height-adjustable baby walker includes an upper frame 100 and a lower frame 300. The upper frame 100 is movably mounted above the lower frame 300 and can be raised and lowered relative to the lower frame 300 under the drive of a gear 205 and a rack 201. Specifically, a vertically arranged rack 201 is fixedly mounted at the bottom of the upper frame 100. The rack 201 meshes with the gear 205 to drive the upper frame 100 to rise and fall. A worm gear 204 and a worm 206 are provided on the lower frame 300. The worm gear 204 is rotatably mounted on the lower frame 300 and is fixedly connected to the gear 205 to drive the gear 205 to rotate. The worm 206 meshes with the worm gear 204.

[0062] In this embodiment, the height of the upper frame 100 can be adjusted by the worm gear 204, worm 206 and gear 205, which can meet the usage needs of children at different height stages and eliminate the need to change the walker during the child's growth stage.

[0063] Furthermore, a housing 203 is provided outside the worm gear 204, worm 206, gear 205, and rack 201 to form a protective structure. The housing 203 is fixed on the lower frame 300. Worm holes are provided on both the left and right sides of the housing 203. The two ends of the worm 206 are rotatably installed in the worm holes through bearings. The worm wheel shaft of the worm gear 204 is rotatably installed on the front side wall of the housing 203. An opening is provided on the top of the housing 203 for the rack 201 to extend out.

[0064] In one embodiment, a worm gear 204, a worm 206, a gear 205, and a rack 201 are disposed at the front end of the walker. The rear end of the walker is provided with an auxiliary limiting structure including a pair of mounting brackets 501, a sliding bracket 506, and a pair of limiting members 503. The mounting brackets 501 are fixedly mounted on the lower frame 300. Each mounting bracket 501 has a sliding groove on one opposite side. The sliding bracket 506 is slidably mounted in the two sliding grooves on both sides and is fixedly connected to the upper frame 100. Multiple vertically arranged first limiting serrations 504 are provided on the two mounting brackets 501. The first limiting serrations 504 are all disposed on the side of the mounting bracket 501 near the sliding bracket 506, and the top surfaces of the first limiting serrations 504 are all horizontally positioned. A first mounting member 510 is fixed to the end face of the sliding frame 506 near the first limiting sawtooth 504. A second mounting member 511 is fixed to the sliding frame 506 below the first mounting member 510. An elastic piece 508 is fixed to the second mounting member 511. Both ends of the elastic piece 508 extend toward the two first limiting sawtooths 504, and each end of the elastic piece 508 has a wedge-shaped limiting block 5081. Limiting members 503 are symmetrically arranged on both sides of the first mounting member 510. The tops of both limiting members 503 are hinged to the sliding frame 506, and the bottoms have slots that fit the first limiting sawtooth 504. When fixed, the first limiting sawtooth 504 is engaged in the slot of the limiting member 503, and its upper horizontal surface abuts against the limiting member 503, restricting the descent of the sliding frame 506. Each limiting member 503 has a limiting pin 5031 in its middle that is adapted to the wedge-shaped limiting block 5081. The limiting pin 5031 can be engaged with the inside of the wedge-shaped limiting block 5081 to keep the limiting member 503 in a tightened state. Two return springs 507 are symmetrically fixed on both sides of the first mounting member 510. The two return springs 507 are respectively connected to the limiting member 503 and are used to push the limiting member 503 outwards, so that the limiting member 503 is engaged with the first limiting sawtooth 504. A second limiting sawtooth 505 is provided above the multiple first limiting sawtooth 504s. The distance between two second limiting sawtooth 505s is less than the distance between two first limiting sawtooth 504s. The second limiting sawtooth 505s are used to push the limiting member 503 to flip and to engage the limiting pin 5031 with the inside of the wedge-shaped limiting block 5081 of the elastic sheet 508. A base plate is fixed between the mounting brackets 501, and a pair of push rods 509 are mounted on the base plate. The working principle of the auxiliary limiting structure provided in this embodiment is as follows: When the upper frame 100 is raised, the limiting member 503 moves upward and, under the action of the inclined surface of the first limiting sawtooth 504, flips away from the first limiting sawtooth 504, thereby ensuring that the first limiting sawtooth 504 disengages from the slot of the limiting member 503; when the upper frame 100 is fixed, please refer to the attached diagram. Figure 7 , 8The slot at the bottom of the limiting member 503 engages with the first limiting tooth 504, and the upper wall of the slot abuts against the horizontal surface of the first limiting tooth 504 to form a limit, thus supporting the upper frame 100. If it is necessary to lower the height of the upper frame 100, first raise the sliding frame 506 until the limiting member 503 rises to the height of the second limiting tooth 505. Please refer to the appendix. Figure 9 , 10 The second limiting sawtooth 505 pushes the limiting member 503 to rotate significantly, causing the limiting pin 5031 to engage inside the wedge-shaped limiting block 5081 of the elastic plate 508. This keeps the limiting block in a drooping state and prevents it from contacting the sawtooth structure. Subsequently, the adjusting sliding frame 506 descends to its lowest position, and the two sides of the elastic plate 508 are pushed upward by the push rod 509 to release the limiting pin 5031. Under the action of the return spring 507, the limiting member 503 rotates outward and contacts the first limiting sawtooth 504. Then, the upper frame 100 is adjusted upward to a suitable height. After the height adjustment is completed, the worm gear 204 and worm 206 form a height limit at the front end of the vehicle body through their self-locking property, and the auxiliary limiting structure forms a height limit at the rear end of the vehicle body through the cooperation of the limiting member 503 and the first limiting sawtooth 504.

[0065] In this embodiment, the serrated structure and the limiting member 503 are used together to form an auxiliary limit, which enhances the stability of the upper frame 100 and ensures the safety and reliability of the walker.

[0066] Furthermore, baffles 502 are fixedly mounted on the front and rear sides of the two mounting brackets 501, thereby forming protection in front of and behind the auxiliary limiting structure.

[0067] In one embodiment, please refer to the appendix. Figure 1 , 45. The height-adjustable baby walker also includes a pair of connecting components symmetrically mounted on both sides of the lower frame 300 to reinforce the frame and further limit movement in the horizontal direction. Specifically, the connecting components include a first limiting slide bar 406, a first slider 407, a second limiting slide bar 403, a second slider 404, a first connecting rod 401, and a second connecting rod 402. The first limiting slide bar 406 is fixedly mounted on the lower frame 300. The first slider 407 is slidably connected to the first limiting slide bar 406. The top of the first connecting rod 401 is hinged to the upper frame 100, and the bottom of the first connecting rod 401 is hinged to the first slider 407. The first slider 407 is slidably connected to the first limiting slide bar 406 fixedly mounted on the lower frame 300. The second limiting slide bar 403 is fixedly mounted on the upper frame 100. The second slider 404 is slidably connected to the second limiting slide bar 403. The second connecting rod 402 is hinged to the top of the second slider 404. The second slider 404 is slidably connected to the second limiting slider 403 fixed on the upper frame 100. The top of the second connecting rod 402 is hinged to the second slider 404. The bottom of the second connecting rod 402 is hinged to the lower frame 300. The first connecting rod 401 is hinged to the middle of the second connecting rod 402.

[0068] Furthermore, the first link 401 is hinged to the upper frame 100 via the first U-shaped plate 405, and the second link 402 is hinged to the lower frame 300 via the second U-shaped plate 408. Specifically, the first U-shaped plate 405 is fixedly mounted on the bottom of the upper frame 100 and has two first side plates. The top end of the first link 401 is located between the two first side plates and hinged to the first U-shaped plate 405. The second U-shaped plate 408 is fixedly mounted on the lower frame 300 and has two second side plates. The bottom end of the second link 402 is located between the two second side plates and hinged to the second U-shaped plate 408.

[0069] In one embodiment, a handle 202 is installed at the end of the worm 206 to facilitate the user to rotate the screw.

[0070] In one embodiment, a handrail 600 is fixedly mounted on the upper frame 100 to facilitate children's gripping while walking.

[0071] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A height adjustable child walker, characterized in that, The height-adjustable child walker comprises: a lower frame; an upper frame arranged above the lower frame, the upper frame being connected with the lower frame and capable of being lifted and lowered; a rack vertically arranged and fixed to the bottom of the upper frame; and a gear rotatably mounted on the lower frame, one side of the gear being in driving engagement with the rack. Further comprising:

2. The height adjustable child walker of claim 1, wherein, a worm gear rotatably mounted on the lower frame, the worm gear being fixedly connected with the gear for driving the gear to rotate; and a worm in driving engagement with the worm gear. Further comprising: a box fixed to the lower frame, both sides of the box being provided with worm holes, both ends of the worm being rotatably mounted in the worm holes through bearings, and a worm shaft of the worm gear being rotatably mounted on the front side wall of the box, the top of the box being provided with an opening for the rack to extend out.

3. The height adjustable child walker of claim 2, wherein, Further comprising: a pair of mounting frames fixed to the lower frame, opposite sides of the two mounting frames being provided with sliding grooves; and 4. The height adjustable child walker of claim 1, wherein, a sliding frame slidably mounted in the two sliding grooves, the sliding frame being fixedly connected with the upper frame. A plurality of first limiting sawteeth vertically arranged are arranged on the mounting frame, the first limiting sawteeth being arranged on the side of the mounting frame close to the sliding frame, and top end faces of the first limiting sawteeth being horizontally arranged; The height-adjustable child walker further comprises:

5. The height adjustable child walker of claim 4, wherein, a first mounting member fixedly arranged on the end face of the sliding frame close to the first limiting sawteeth; a second mounting member fixedly arranged on the sliding frame below the first mounting member; a resilient sheet fixedly arranged on the second mounting member, both ends of the resilient sheet extending towards the two first limiting sawteeth, and both ends of the resilient sheet being provided with wedge-shaped limiting blocks; a pair of limiting members symmetrically arranged on both sides of the first mounting member, top portions of the two limiting members being hingedly connected with the sliding frame, bottom portions of the two limiting members being provided with clamping grooves matched with the first limiting sawteeth, and middle portions of the two limiting members being provided with limiting pins matched with the wedge-shaped limiting blocks; a pair of return springs symmetrically fixedly arranged on both sides of the first mounting member and connected with the two limiting members. Second limiting sawteeth are arranged above the first limiting sawteeth, and a distance between the two second limiting sawteeth is smaller than a distance between the two first limiting sawteeth. A bottom plate is fixedly arranged between the mounting frames, the bottom plate being located below the first limiting sawteeth, and a pair of top rods being mounted on the bottom plate.

6. The height adjustable child walker of claim 5, wherein, Front and back sides of the two mounting frames are fixedly provided with baffles.

7. The height adjustable child walker of claim 5, wherein, Further comprising:

8. The height adjustable child walker of claim 4, wherein, a pair of connecting assemblies mounted on both sides of the lower frame; 9. A height adjustable child walker as claimed in any one of claims 1 to 7 wherein, wherein the connecting assembly comprises: a first limiting slide rod fixedly arranged on the lower frame; a first sliding block in sliding connection with the first limiting slide rod; a first connecting rod having a top portion hingedly connected with the upper frame and a bottom portion hingedly connected with the first sliding block; a second limiting slide rod fixedly arranged on the upper frame; a second sliding block in sliding connection with the second limiting slide rod; and a second connecting rod having a top portion hingedly connected with the second sliding block and a bottom portion hingedly connected with the lower frame. The connecting assembly further comprises: ​ 10. The height adjustable child walker of claim 9, wherein, ​ a first U-shaped plate secured to the upper frame bottom, the first U-shaped plate having two first side plates, the first link top end being located between the two first side plates and being hingedly connected to the first U-shaped plate; and a second U-shaped plate secured to the lower frame, the second U-shaped plate having two second side plates, the second link bottom end being located between the two second side plates and being hingedly connected to the second U-shaped plate.

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