Patent Application
20210403069
The present invention relates to a baby stroller frame linked folding device. On the upper edge of the rear leg frame of the baby stroller, a slide base is provided, which can slide and be hooked. On the upper end of the rear leg frame, a linked folding joint is provided, pivotally connected to the front leg frame and the handlebar frame. Two connecting rods are pivotally connected to the slide base for further linkage with the front leg frame and the handlebar frame. On the inner side of the linked folding joint, a seatback clutch joint is configured for installation of the seatback frame. When the upper handlebar frame is folded toward the lower handlebar frame, the seatback clutch joint will be released and the seatback frame will fall down, and then, the slide base will be unhooked and slide downward, and through the connecting rods, it will pull the front leg frame and the handlebar frame to move close to the rear leg frame. Thus, the baby stroller can be folded all at once.
Things to be considered when designing a baby stroller include weight capacity, inner cushion to support and cover the baby, shock absorbing performance, two-way operation, adjustable seat, sun shading, detachable cushion for easy washing etc. These are mainly required for the physical and psychological comfort of the baby. When operating a baby stroller, a parent or a babysitter may also consider whether the baby stroller can be folded easily.
In order to facilitate folding and unfolding operations, and minimize the size of the baby stroller after folding for easy transportation and storage, there are many different kinds of baby strollers in the current market, ranging from double folding to triple folding, and featuring different structures and operations. In the design of a triple folding baby stroller, the tilting angle of the seatback can be adjusted so that the baby can sit, lean back or lie flat. However, when folding the baby stroller, one has to fold the seatback backward and downward before folding the stroller frame. Such an operation is quite inconvenient for users.
In order to solve the problem of inconvenience that the above-mentioned triple-folding baby stroller can not be folded without turning down the seatback first, the present invention provides a method to fold the baby stroller with just one operation: through the linked folding joint connecting the front and rear leg frames and the handlebar frame, when the handlebar frame is folded, the pushing and releasing block configured inside it will continuously push the upper sliding block inside the linked folding joint, causing the lower sliding block to push and release the seatback clutch joint so that the seatback frame will naturally fall down, and then, the lower sliding block will push and release the hook so that it can slide along the slide base configured on the rear leg frame, and subsequently, the two connecting rods pivotally connected on the slide base will pull the front leg frame and the handlebar frame to move close to the rear leg frame. Thus, the baby stroller can be folded all at once.
To solve the above technical problem, the present invention offers the following solution:
A baby stroller frame linked folding device, characteristically comprising: a linked folding joint provided on the upper end of a rear leg frame, pivotally connected to a front leg frame and a handlebar frame. The handlebar frame comprises a lower handlebar frame and an upper handlebar frame. The lower handlebar frame is pivotally connected to the linked folding joint, and at the connecting position, a pushing and releasing block is configured inside. The upper handlebar frame has a folding operator, and is pivotally connected to the lower handlebar frame through a handlebar folding clutch joint. On the handlebar folding clutch joint, a cord is configured, which can pull the pushing and releasing block inside the lower handlebar frame when the upper handlebar frame is folded. A seatback frame is provided, whose tilting angle can be adjusted. Between the seatback frame and the linked folding joint, a seatback clutch joint is configured. In particular:
On the rear leg frame, a slide base is configured, capable of sliding along the rear leg frame. On the slide base, a hook receiver portion is configured. On both sides of the upper end of the slide base, two connecting rods are respectively and pivotally connected, each pivotally connected to the front leg frame and the lower handlebar frame;
Inside the linked folding joint, an upper sliding block is configured, capable of sliding back and forth, with its rear end elastically pushed against said pushing and releasing block. Inside the linked folding joint and below the upper sliding block, a lower sliding block is configured, elastically pushed against the upper sliding block, and capable of sliding up and down. At the pushing positions of the upper sliding block and the lower sliding block, tilted supporting facets are configured to push against each other. On the inner side of the lower sliding block, side tilted supporting facets are further configured. Meanwhile, inside the linked folding joint and below the lower sliding block, a hook is pivotally configured, capable of turning elastically. The upper and lower ends of the hook is respectively configured with a bracing portion to receive the push by the lower end of the lower sliding block and a hook portion to catch the hook receiver portion of the slide base;
The seatback clutch joint comprises a groove portion configured at the corresponding position on the linked folding joint. Inside the groove portion, a releasing push block is configured, capable of sliding left and right, and having a tilted supporting facet to push against the side tilted supporting facet of the lower sliding block. At a corresponding position on the seatback frame, another groove portion is configured correspondingly. Inside the groove portion, a bonding tooth is configured, elastically pushing against the releasing push block, so that the bonding tooth can be caught inside the groove portions of the linked folding joint and the seatback frame at the same time.
When the upper handlebar frame is folded onto the lower handlebar frame, the cord is driven to pull the pushing and releasing block, pushing the upper sliding block inside the linked folding joint to slide forward, and driving the lower sliding block to slide downward. It will firstly push the releasing push block inside the seatback clutch joint, so that the bonding tooth is released from the groove portion of the linked folding joint, allowing the seatback frame to fall down naturally. Then, the lower end of the lower sliding block will push the bracing portion of the hook, so that the hook portion will be released from the hook receiver portion of the slide base, allowing the slide base to slide downward. Finally, through the two connecting rods, the front leg frame and the folded handlebar frame can be folded onto the rear leg frame.
The present invention has the following beneficial efficacy: when the upper handlebar frame is folded toward the lower handlebar frame, it will drive the upper sliding block inside the linked folding joint and further drive the lower sliding block. Sequentially, the seatback clutch joint will be released, the seatback frame will fall down, and then, the originally hooked and fixed slide base on the rear leg frame will be released, and the folded handlebar frame and the front leg frame will be folded together onto the rear leg frame. Thus, the baby stroller can be folded all at once, without the extra need to put down the seatback frame first.
Indications of the accompanying drawings: 1—rear leg frame; 11—sliding groove; 2—linked folding joint; 20—supporting plate; 21—upper sliding block; 211—tilted supporting facet; 22—lower sliding block; 220—lower slot; 221 tilted supporting facet; 222—tilted supporting facet; 223—lower pusher portion; 23—hook; 231—bracing portion; 232—hook portion; 24—spring; 25—spring; 26—groove portion; 27—releasing push block; 271—tilted supporting facet; 28—spring; 3—front leg frame; 4—handlebar frame; 41—lower handlebar frame; 42—upper handlebar frame; 421—folding operator; 43—handlebar folding clutch joint; 44—cord; 45—pushing and releasing block; 5—slide base; 51—inlayed sliding portion; 52—hook receiver portion; 6—connecting rod; 7—seatback frame; 70—spring; 71—groove portion; 72—bonding tooth; 8—front guardrail; A—seatback clutch joint.
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Further, inside said lower handlebar frame 41 that is pivotally connected to the linked folding joint 2, a pushing and releasing block 45 is configured, capable of sliding back and forth. Said cord 44 goes around the pivotal connecting position and backward, and is connected on the pushing and releasing block 45. Thus, when the cord 44 is pulled or released, the pushing and releasing block 45 can move forward or backward.
Further, inside the upper portion of said linked folding joint 2, an upper sliding block 21 is configured, also capable of sliding back and forth. At a lower middle position of the upper sliding block 21, a tilted supporting facet 211 is configured. Inside the linked folding joint 2 and below the upper sliding block 21, a lower sliding block 22 is configured, capable of sliding up and down. At a middle position of the lower sliding block 22, a lower slot 220 is configured. Inside the lower slot 220, a spring 25 is provided to elastically push the lower sliding block 22 upward so that it can sit on the supporting plate 20 inside the linked folding joint 2. At the same time, on the upper end of the lower sliding block 22, a tilted supporting facet 221 is configured to push against the tilted supporting facet 211 of the upper sliding block 21. On the inner side of the lower sliding block 22, two tilted supporting facets 222 are configured, one at a lower position and the other on the lower end. On the left and lower end of the lower sliding block 22, a lower pusher portion 223 is configured. Then, inside the linked folding joint 2 and below the lower sliding block 22, an L-shaped hook 23 is pivotally configured, capable of turning. On the upper end of the hook 23, a bracing portion 231 is configured, to be pushed by the lower pusher portion 223 of the lower sliding block 22. On the lower end of the hook 23, a hook portion 232 is configured. Inside the linked folding joint 2 and below the bracing portion 231, a spring 24 is configured. The upper end of the spring 24 elastically pushes against the bottom of the bracing portion 231, so that the hook portion 232 on the lower end of the hook 23 can be turned and be caught on the hook receiver portion 52 at the lower end of said slide base 5.
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