Backrest adjusting structure of baby stroller

Abstract

The utility model relates to the technical field of baby stroller, disclose a baby stroller backrest adjusting structure, including backrest main part, the inner surface fixed mounting of backrest main part has adjustable mechanism, adjustable mechanism includes support backrest, the outer surface of support backrest is fixedly connected with the inner surface of backrest main part, the front of support backrest is slidably installed with adjusting backrest through the sliding slot, the back of adjusting backrest is fixedly installed with adjusting assembly, the top of adjusting backrest is fixedly installed with head protection subassembly. The baby stroller backrest adjusting structure, drive adjusting assembly through pressing one press block, remove the locking of rotation block and make it drive gear rotation, the meshing transmission of gear and fixed rack, convert rotation movement into the vertical linear motion of adjusting backrest along the sliding slot, realize the stepless regulation of backrest length, loosen one press block after adjusting in place, one clamping block resets and re-enters one clamping groove under the action of one spring, firm locking of mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of baby strollers, and more particularly to a baby stroller backrest adjustment structure. Background Technology

[0002] As a common means of carrying and transporting infants and toddlers, the core function of a stroller is to provide a safe and mobile resting space for the baby and reduce the burden on caregivers. Early designs primarily focused on basic structural stability and ease of pushing, typically including basic modules such as a frame, seat / bassinet, wheels, and braking system. The frame structure has evolved from early rigid fixed designs to foldable designs, greatly improving the convenience of storage and carrying. In terms of materials, there has been a shift from traditional metal tubing to lightweight and high-strength materials such as high-strength aluminum alloys and composite plastics.

[0003] Current baby strollers use backrests of fixed height, whose length cannot be adjusted to accommodate the rapid growth of infants. During the newborn period, the infant's torso is short, and the fixed backrest provides relatively complete back support. However, as the baby grows older, their length increases significantly, and their head gradually approaches or exceeds the upper edge of the original backrest, resulting in insufficient support for the shoulders and above. This structural mismatch causes the baby's head to wobble and tilt uncontrollably, especially during sleep, due to the lack of sufficient rearward and lateral support. This affects comfort and sleep quality, and also raises potential safety concerns. Utility Model Content

[0004] In view of the problems of existing baby strollers with fixed-height backrests that cannot be adjusted to accommodate the rapid growth of infants, and the lack of head protection for the infants, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide an adjustable backrest structure for a baby stroller. The purpose is that the backrest of the baby stroller has an adjustable length backrest design, which can continuously provide complete wrapping and support from the waist to the head for babies of different height stages through mechanical extension or expansion parts, so as to better meet their dynamic needs during the growth process.

[0006] To solve the above technical problems, this utility model provides the following technical solution: a baby stroller backrest adjustment structure, including a backrest body, wherein an adjustable mechanism is fixedly installed on the inner surface of the backrest body; The adjustable mechanism includes a support backrest, the outer surface of which is fixedly connected to the inner surface of the backrest body, an adjustable backrest slidably mounted on the front of the support backrest via a slide groove, an adjustment component fixedly mounted on the back of the adjustable backrest, and a headrest component fixedly mounted on the top of the adjustable backrest.

[0007] As a preferred embodiment of the baby stroller backrest adjustment structure of this utility model, the adjustment component includes a rotating block, the outer surface of the rotating block is rotatably connected to the inner surface of the backrest body, a gear is fixedly installed on the outer surface of the rotating block, a rack is meshed on the outer surface of the gear, and the front of the rack is fixedly connected to the back of the backrest.

[0008] As a preferred embodiment of the baby stroller backrest adjustment structure of this utility model, the adjustment component further includes a connecting frame, the back of the connecting frame being fixedly connected to the front of the backrest body, a first spring being fixedly installed on the back of the connecting frame, a first slider being fixedly installed at the rear end of the first spring, a first locking block being fixedly installed on the outer surface of the first slider, a first pressing block being fixedly installed on the back of the first locking block, and the outer surface of the first pressing block being movably connected to the inner surface of the rotating block.

[0009] As a preferred embodiment of the baby stroller backrest adjustment structure of this utility model, the adjustment component further includes a first slot, which is formed on the inner surface of the rotating block, and the inner surface of the first slot is engaged with the outer surface of the first slot.

[0010] As a preferred embodiment of the baby stroller backrest adjustment structure of this utility model, the headrest assembly includes a headrest, the bottom of which is fixedly connected to the top of the adjustable backrest. A first fixing frame is fixedly installed on both sides of the headrest. An upper rotating block is fixedly installed on the front of the first fixing frame. A lower rotating block is rotatably installed on the inner surface of the upper rotating block. A head guard plate is fixedly installed on the outer surface of the lower rotating block through a second fixing frame.

[0011] As a preferred embodiment of the baby stroller backrest adjustment structure of this utility model, a locking assembly is fixedly installed between the upper rotating block and the lower rotating block. The locking assembly includes a second spring, the bottom of which is fixedly connected to the bottom of the inner cavity of the lower rotating block. A second slider is fixedly installed on the top of the second spring. The outer surface of the second slider is slidably connected to the inner surface of the upper rotating block. A second button is fixedly installed on the top of the second slider. The top end of the second button penetrates the upper rotating block and extends to the outside of the upper rotating block.

[0012] As a preferred embodiment of the baby stroller backrest adjustment structure of this utility model, the locking component further includes a second slot, which is opened on the inner surface of the lower rotating block. A second block is fixedly installed on the inner surface of the second slot, and the opposite sides of the two second blocks are fixedly connected to the outer surface of the second slider.

[0013] As a preferred embodiment of the baby stroller backrest adjustment structure of this utility model, the locking component further includes a rotating groove, which is formed on the inner surface of the lower rotating block and communicates with the second slot.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model adds an adjustable backrest design to the baby stroller. Through the cooperation of the backrest body and the supporting backrest with the sliding groove and the adjustable backrest, and the cooperation of the rotating block and the gear with the rack and the connecting frame, the rotation operation is precisely converted into a smooth linear lifting and lowering of the backrest. The cooperation of the connecting frame and the first spring with the first slider with the first locking block and the first locking slot, and the cooperation of the first slider and the first pressing block, can realize stepless adjustment of the backrest length. This meets the dynamic needs of the baby for back support length at different growth stages, avoids the problem of insufficient support for the baby's head and easy shaking caused by a fixed backrest height, and realizes the adaptability of the backrest support range to expand synchronously with the baby's body length.

[0015] 2. This utility model adds a head protection design to the baby stroller. Through the cooperation of the upper rotating block and the first fixing frame with the lower rotating block and the second fixing frame, the cooperation of the first fixing frame and the adjustable backrest with the second fixing frame and the head guard, the cooperation of the upper rotating block and the lower rotating block with the second spring and the second slider, the cooperation of the second slider and the second button with the second slot and the second locking block, and the cooperation of the second locking block, the rotating slot and the lower rotating block, the purpose of flexibly adjusting the range and angle of lateral head support is achieved. This avoids the safety hazard of uncontrolled shaking or tilting of the baby's head due to the lack of lateral restraint during sleep, and achieves a stable, close-fitting, and customizable wrap-around protection effect for the baby's head. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the baby stroller backrest adjustment structure of this utility model; Figure 2 This is a schematic diagram of the supporting backrest and the adjustable backrest of the baby stroller backrest adjustment structure of this utility model. Figure 3 This is a partial three-dimensional sectional view of the adjustment component of the baby stroller backrest adjustment structure of this utility model; Figure 4 This is a partial cross-sectional perspective view of the headrest component of the baby stroller backrest adjustment structure of this utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Backrest main body; 2. Adjustable mechanism; 21. Backrest support; 22. Backrest adjustment; 23. Adjustment component; 231. Rotating block; 232. Gear; 233. Rack; 234. Connecting frame; 235. Spring No. 1; 236. Slider No. 1; 237. Locking block No. 1; 238. Press block No. 1; 239. Slot No. 1; 24. Headrest component; 241. Headrest; 242. Fixing frame No. 1; 243. Upper rotating block; 244. Lower rotating block; 245. Fixing frame No. 2; 246. Head guard plate; 25. Locking component; 251. Spring No. 2; 252. Slider No. 2; 253. Press block No. 2; 254. Slot No. 2; 255. Locking block No. 2; 256. Rotating groove; 26. Sliding groove. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Example 1 Reference Figures 1-3 This is the first embodiment of the present utility model, which provides a baby stroller backrest adjustment structure. The baby stroller backrest adjustment structure includes a backrest body 1, and an adjustable mechanism 2 is fixedly installed on the inner surface of the backrest body 1. The adjustable mechanism 2 includes a support backrest 21, the outer surface of which is fixedly connected to the inner surface of the backrest body 1. An adjustable backrest 22 is slidably mounted on the front of the support backrest 21 via a slide groove 26. An adjustment component 23 is fixedly mounted on the back of the adjustable backrest 22. A head protection component 24 is fixedly mounted on the top of the adjustable backrest 22.

[0020] The adjustment component 23 includes a rotating block 231. The outer surface of the rotating block 231 is rotatably connected to the inner surface of the backrest body 1. A gear 232 is fixedly installed on the outer surface of the rotating block 231. A rack 233 is meshed on the outer surface of the gear 232. The front of the rack 233 is fixedly connected to the back of the backrest 21.

[0021] The adjustment assembly 23 also includes a connecting frame 234. The back of the connecting frame 234 is fixedly connected to the front of the backrest body 1. A first spring 235 is fixedly installed on the back of the connecting frame 234. A first slider 236 is fixedly installed at the rear end of the first spring 235. A first locking block 237 is fixedly installed on the outer surface of the first slider 236. A first pressing block 238 is fixedly installed on the back of the first locking block 237. The outer surface of the first pressing block 238 is movably connected to the inner surface of the rotating block 231.

[0022] The adjustment component 23 also includes a first slot 239, which is formed on the inner surface of the rotating block 231, and the inner surface of the first slot 239 is engaged with the outer surface of the first block 237.

[0023] During use, when the backrest 22 needs to be adjusted in length, the user presses the exposed first button 238. The first button 238 drives the first locking block 237 to compress the first spring 235 and disengage it from the first locking groove 239 on the inner surface of the rotating block 231, thereby releasing the circumferential lock on the rotating block 231. At this time, the user can rotate the rotating block 231, and the gear 232 fixed on its outer surface rotates accordingly. Through meshing with the rack 233 fixed to the back of the supporting backrest 21, the adjustment component 23, which is fixedly connected to the backrest 22, can be driven to slide smoothly up and down along the slide groove 26, realizing stepless adjustment of the extension height of the backrest 22. After adjusting to the desired position, release the first button 238. The first spring 235 pushes the first slider 236 and the first locking block 237 to reset, so that the first locking block 237 is locked into the first slot 239 on the rotating block 231 at the corresponding position, thereby re-locking the rotating block 231 and the gear 232, thus firmly maintaining the adjusted backrest length.

[0024] Example 2 Reference Figure 1 and Figure 4 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the head protection assembly 24 includes a headrest 241. The bottom of the headrest 241 is fixedly connected to the top of the adjustable backrest 22. A first fixing bracket 242 is fixedly installed on both sides of the headrest 241. An upper rotating block 243 is fixedly installed on the front of the first fixing bracket 242. A lower rotating block 244 is rotatably installed on the inner surface of the upper rotating block 243. A head guard plate 246 is fixedly installed on the outer surface of the lower rotating block 244 through a second fixing bracket 245.

[0025] A locking assembly 25 is fixedly installed between the upper rotating block 243 and the lower rotating block 244. The locking assembly 25 includes a second spring 251. The bottom of the second spring 251 is fixedly connected to the bottom of the inner cavity of the lower rotating block 244. A second slider 252 is fixedly installed on the top of the second spring 251. The outer surface of the second slider 252 is slidably connected to the inner surface of the upper rotating block 243. A second button 253 is fixedly installed on the top of the second slider 252. The top end of the second button 253 passes through the upper rotating block 243 and extends to the outside of the upper rotating block 243.

[0026] The locking component 25 also includes a second slot 254, which is opened on the inner surface of the lower rotating block 244. A second block 255 is fixedly installed on the inner surface of the second slot 254, and the opposite sides of the two second blocks 255 are fixedly connected to the outer surface of the second slider 252.

[0027] The locking component 25 also includes a slot 256, which is formed on the inner surface of the lower rotating block 244 and is connected to the second slot 254.

[0028] During use, when it is necessary to adjust the angle of the head guard 246 to better fit and secure the baby's head, the user can press upward on the second button 253, which extends to the outside of the upper rotating block 243. The second button 253 causes the connected second slider 252 to slide downward in the inner cavity of the upper rotating block 243, while compressing the second spring 251 located below. When the second slider 252 moves downward, the second locking block 255 on its outer surface slides from the second locking slot 254 into the rotating slot 256, thereby releasing the angle lock between the upper rotating block 243 and the lower rotating block 244. The user can freely rotate the head guard 246 connected by the second fixing bracket 245. After adjusting the head guard 246 to the ideal angle, the second button 253 is released, and the compressed second spring 251 releases its elasticity, pushing the second slider 252 and the second locking block 255 to reset upward, so that the second locking block 255 slides from the rotating slot 256 and re-locks into the corresponding second locking slot 254. This completes the reliable locking of the new angle of the head guard 246, ensuring that the baby's head receives stable support during sleep.

[0029] The remaining structure is the same as that in Example 1.

[0030] Based on embodiments 1-2, the working principle of this utility model is as follows: When adjusting the backrest 22 to accommodate the baby's growth, pressing the first button 238 drives the adjustment component 23, releasing the lock of the rotating block 231 and causing it to drive the gear 232 to rotate; the meshing transmission between the gear 232 and the fixed rack 233 converts the rotational motion into the vertical linear motion of the backrest 22 along the slide groove 26, realizing stepless adjustment of the backrest length; after adjustment, releasing the first button 238 causes the first locking block 237 to reset under the action of the first spring 235 and re-lock into the first locking slot 239, firmly locking the mechanism. When it is necessary to adjust the angle of the headrest 246 to better fit and fix the baby's head, the user can press the second button 253 extending to the outside of the upper rotating block 243. The second button 253 drives the connected second slider 252 to slide downward in the inner cavity of the upper rotating block 243, while compressing the second spring 251 located below. When the second slider 252 moves downward, the second locking block 255 on its outer surface slides from the second locking slot 254 into the rotating slot 256, thereby releasing the angle lock between the upper rotating block 243 and the lower rotating block 244. The user can freely rotate the head guard 246 connected by the second fixing bracket 245. After adjusting the head guard 246 to the ideal angle, the second button 253 is released, and the compressed second spring 251 releases its elasticity, pushing the second slider 252 and the second locking block 255 to reset upward, so that the second locking block 255 slides from the rotating slot 256 and re-locks into the corresponding second locking slot 254. This completes the reliable locking of the new angle of the head guard 246, ensuring that the baby's head receives stable support during sleep.

[0031] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A baby stroller backrest adjustment structure, comprising a backrest body (1), characterized in that: An adjustable mechanism (2) is fixedly installed on the inner surface of the backrest body (1). The adjustable mechanism (2) includes a support backrest (21), the outer surface of which is fixedly connected to the inner surface of the backrest body (1), the front of which is slidably mounted with an adjustable backrest (22) via a slide groove (26), the back of which is fixedly mounted with an adjustment component (23), and the top of which is fixedly mounted with a head protection component (24).

2. The baby stroller backrest adjustment structure according to claim 1, characterized in that: The adjustment component (23) includes a rotating block (231), the outer surface of which is rotatably connected to the inner surface of the backrest body (1), a gear (232) is fixedly installed on the outer surface of the rotating block (231), a rack (233) is meshed on the outer surface of the gear (232), and the front of the rack (233) is fixedly connected to the back of the backrest (21).

3. The baby stroller backrest adjustment structure according to claim 1, characterized in that: The adjustment assembly (23) also includes a connecting frame (234), the back of which is fixedly connected to the front of the backrest body (1), a first spring (235) is fixedly installed on the back of the connecting frame (234), a first slider (236) is fixedly installed at the rear end of the first spring (235), a first locking block (237) is fixedly installed on the outer surface of the first slider (236), a first pressing block (238) is fixedly installed on the back of the first locking block (237), and the outer surface of the first pressing block (238) is movably connected to the inner surface of the rotating block (231).

4. The baby stroller backrest adjustment structure according to claim 1, characterized in that: The adjustment component (23) also includes a first slot (239), which is located on the inner surface of the rotating block (231), and the inner surface of the first slot (239) is engaged with the outer surface of the first block (237).

5. The baby stroller backrest adjustment structure according to claim 1, characterized in that: The head protection assembly (24) includes a headrest (241), the bottom of which is fixedly connected to the top of an adjustable backrest (22). A first fixing bracket (242) is fixedly installed on both sides of the headrest (241). An upper rotating block (243) is fixedly installed on the front of the first fixing bracket (242). A lower rotating block (244) is rotatably installed on the inner surface of the upper rotating block (243). A head guard plate (246) is fixedly installed on the outer surface of the lower rotating block (244) through a second fixing bracket (245).

6. The baby stroller backrest adjustment structure according to claim 5, characterized in that: A locking assembly (25) is fixedly installed between the upper rotating block (243) and the lower rotating block (244). The locking assembly (25) includes a second spring (251). The bottom of the second spring (251) is fixedly connected to the bottom of the inner cavity of the lower rotating block (244). A second slider (252) is fixedly installed on the top of the second spring (251). The outer surface of the second slider (252) is slidably connected to the inner surface of the upper rotating block (243). A second button (253) is fixedly installed on the top of the second slider (252). The top end of the second button (253) penetrates the upper rotating block (243) and extends to the outside of the upper rotating block (243).

7. The baby stroller backrest adjustment structure according to claim 6, characterized in that: The locking component (25) also includes a second slot (254), which is opened on the inner surface of the lower rotating block (244). A second block (255) is fixedly installed on the inner surface of the second slot (254), and the two second blocks (255) are fixedly connected to the outer surface of the second slider (252) on opposite sides.

8. The baby stroller backrest adjustment structure according to claim 6, characterized in that: The locking component (25) also includes a rotating groove (256), which is formed on the inner surface of the lower rotating block (244) and is connected to the second card slot (254).

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