Crawling ladder for children

Abstract

A connecting rod mechanism is formed by a front supporting leg, a rear supporting leg, a standing plate and the like, the standing plate can be stabilized, meanwhile, a stable support of the whole crawling ladder is formed, a supporting rod is rotationally connected to the rotary connecting position of the front supporting leg and the rear supporting leg, meanwhile, a supporting rod lock and a connecting rod lock are arranged to lock the position between the front supporting leg and the rear supporting leg, and the supporting rod lock is locked. When the connecting rod lock is located at the unlocking position, the front supporting leg and the rear supporting leg rotate relatively to be unfolded or rotate to be close to each other, so that the supporting rod lock is controlled to be switched between the locking position and the unlocking position, and during folding, the front supporting leg and the rear supporting leg are rotated to be close to each other, so that the whole crawling ladder is convenient to fold and operate and small in occupied space after being folded; the storage is convenient, and the practicability is high.

Description

Technical Field

[0001] The invention belongs to the field of children's products, and in particular relates to a children's climbing ladder. Background Art

[0002] In family life, children need to use ladders to wash, go to the toilet or get things from high places due to their height limitations. However, such ladders are not easy to store when not in use and take up a lot of space.

[0003] Therefore, it is particularly important to design a children's ladder that can be folded and has a small volume after folding. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a children's climbing ladder.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a children's climbing ladder, which has an unfolded position and a folded position, comprises an enclosure frame, a support rod for supporting the enclosure frame, and a standing board supporting structure constituting a connecting rod mechanism, wherein the standing board supporting structure is provided with a connecting rod lock to lock it in the unfolded position, the standing board supporting structure comprises a front supporting leg, and a rear supporting leg whose top is pivotally connected to the top of the front supporting leg around an axis, one of the top of the front supporting leg and the top of the rear supporting leg is rotatably connected to the lower end of the supporting rod, and a supporting rod lock is provided between the lower end of the supporting rod, When the connecting rod lock is in the unlocked position, the front supporting leg and the rear supporting leg rotate relatively to expand or rotate close to each other, thereby controlling the supporting rod lock to switch between the locked position and the unlocked position.

[0006] In some embodiments, the standing board support structure also includes a sliding sleeve slidably disposed on one of the front supporting leg and the rear supporting leg, and a standing board pivotally connected to the other of the front supporting leg and the rear supporting leg around two axes, and the standing board is also pivotally connected to the sliding sleeve around three axes.

[0007] In some embodiments, the connecting rod lock is arranged between the sliding sleeve and the standing board. When locked, the sliding sleeve is prohibited from sliding relative to the front supporting leg or the rear supporting leg by locking the rotational relationship between the sliding sleeve and the standing board, thereby locking the standing board supporting structure. An unlocking control mechanism for controlling the unlocking of the connecting rod lock is provided on the standing board.

[0008] In certain embodiments, the connecting rod lock is located below the three axes, and when locked, a line connecting the connecting rod lock and the three axes is parallel to a center line of the sliding sleeve.

[0009] In some embodiments, an unlocking member driving cavity is provided between the top of the front supporting leg and the top of the rear supporting leg, and an unlocking member that slides axially along the axis is provided in the driving cavity, and an interference protrusion that spirally interferes with the unlocking member is provided on the other of the top of the front supporting leg and the top of the rear supporting leg. When the front supporting leg and the rear supporting leg rotate relative to each other and approach each other, the interference protrusion and the unlocking member are matched with a slope to push the unlocking member along the axis toward the support rod, thereby unlocking the support rod lock.

[0010] In some embodiments, the lower end of the support rod is coaxially connected to the top of the front support leg or the top of the rear support leg around the axis, and the support rod lock includes a first locking groove arranged on one of the top of the front support leg and the top of the rear support leg, a second locking groove arranged on the lower end of the support rod, a locking member slidably arranged between the first locking groove and the second locking groove, and an elastic member arranged between the locking member and the lower end of the support rod. In the locked position, the locking member is simultaneously inserted into the first locking groove and the second locking groove, and when the unlocking member is pushed out along the axis toward the support rod, the locking member overcomes the elastic force of the elastic member and is completely pushed from the first locking groove into the second locking groove, and the support rod lock is unlocked.

[0011] In some embodiments, the enclosure frame is connected to the top of the support rod around a four-axis pivot, and a enclosure frame lock is provided therebetween to lock the rotating joint.

[0012] In some embodiments, the surrounding frame is a square closed surrounding frame, and the top of the support rod is connected to the middle part of the surrounding frame in the front-to-back direction around the four-axis pivot.

[0013] In some embodiments, a seat cover is provided on the surrounding frame, and the seat cover is made of cloth, including a seat layer, and a side enclosure body whose lower edge is connected to the edge of the seat layer. The side enclosure body is provided with at least one binding structure that can be detachably mounted on the surrounding frame, and the binding structure includes a wrapping body with one side fixed to the upper part of the side enclosure body, and a connecting mechanism that detachably connects the other side of the wrapping body that can bypass the surrounding frame to the side enclosure body below.

[0014] In some embodiments, the support rod is a telescopic rod that can be raised and lowered and adjusted, and the support rod includes a supporting pipe section at the lower end, a telescopic pipe section that can slide up and down and is arranged in the supporting pipe section, and a telescopic locking mechanism that can lock the supporting pipe section and the telescopic pipe section, and the telescopic pipe section is provided with a telescopic operating member for controlling the telescopic locking mechanism.

[0015] The scope of the present invention is not limited to the technical solutions formed by a specific combination of the above technical features, but also includes other technical solutions formed by any combination of the above technical features or their equivalent features. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in this application.

[0016] Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the present invention provides a children's ladder with a new folding principle, in which the front supporting legs, the rear supporting legs and the standing board constitute a connecting rod mechanism, which can not only stabilize the standing board, but also constitute a stable support for the entire ladder, and is used to support the upper support rods, surrounding frames and other structures; the support rods are rotatably connected to the rotating connection between the front supporting legs and the rear supporting legs, and a support rod lock is provided at the same time, so that when the connecting rod lock is unlocked, the front supporting legs and the rear supporting legs are relatively close to each other, thereby controlling the unlocking of the support rod lock, so that the support rod and the lower connecting rod mechanism are folded synchronously, the folding operation is convenient, the space occupied after folding is small, it is convenient for storage, and it is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the children's ladder in the unfolded state; Figure 2 This is a side view of the structure of the children's ladder in the unfolded state; Figure 3 This is a side cross-sectional view of the structure of the children's ladder in the unfolded state; Figure 4 This is a schematic diagram of the support rod lock explosion; Figure 5 It is a schematic diagram of the three-dimensional structure of the children's climbing ladder during the folding process; Figure 6 It is a schematic diagram of the three-dimensional structure of the children's climbing ladder in the folded state; Among them: 1. front support leg; 2. rear support leg; 3. standing board; 4. sliding sleeve; 5. support rod; 51. support pipe section; 52. telescopic pipe section; 53. inner sliding sleeve; 54. locking pin; 55. traction rope; 56. telescopic operating part; 6. surrounding frame; 7. connecting rod lock; 8. support rod lock; 81. unlocking part; 82. abutting protrusion; 83. locking part; 84. elastic part; X1, one axis; X2, two axes; X3, three axes; X4, four axes. DETAILED DESCRIPTION

[0018] A children's ladder as shown in the accompanying drawings has an unfolded position and a folded position, and includes a surrounding frame 6, a support rod 5 for supporting the surrounding frame 6, and a standing board support structure constituting a connecting rod mechanism.

[0019] like Figure 1As shown, the standing board support structure includes a U-shaped front supporting leg 1, a U-shaped rear supporting leg 2 whose top sides are pivotally connected to the top sides of the front supporting leg 1 around an axis X1, two sliding sleeves 4 respectively slidably arranged on the front leg rods on both sides of the front supporting leg 1, and a standing board 3 whose left and right side parts are respectively pivotally connected to the corresponding rear leg rods of the rear supporting leg 2 around two axes X2, and the left and right front parts of the standing board 3 are also respectively pivotally connected to the corresponding side sliding sleeves 4 around three axes X3. In this embodiment, the standing board support structure constitutes a deformable triangular connecting rod mechanism when viewed from the side, and the connecting rod mechanism is simple and has a simple shape.

[0020] The standing board support structure is provided with a connecting rod lock 7 for locking it in the unfolded position.

[0021] In this embodiment, the connecting rod lock 7 is arranged between the sliding sleeve 4 and the standing board 3. When locked, the sliding sleeve 4 is locked in rotation with the standing board 3 to prevent the sliding sleeve 4 from sliding relative to the front supporting leg 1, thereby locking the standing board supporting structure. Figure 1 As shown, the connecting rod lock 7 is located below the three-axis X3. When locked, the locking head of the connecting rod lock 7 is parallel to the line between the three-axis X3 and the center line of the sliding sleeve 4, so that the standing board support structure is more stable in the locked state. An unlocking control mechanism for controlling the unlocking of the connecting rod lock 7 is provided on the standing board 3.

[0022] The locking mechanism 4 is a kind of locking mechanism that can be used to unlock the locking cam 7, and the locking mechanism 4 is a kind of locking mechanism that can be used to unlock the locking cam 7.

[0023] When the connecting rod lock 7 is in the unlocked position and needs to be folded, the front support leg 1 and the rear support leg 2 rotate relatively and move closer together during the process of the standing board 3 falling naturally along the sliding sleeve 4 under gravity, thereby controlling the unlocking of the support rod lock 8 described below. Of course, vice versa, when it is necessary to unfold, the front part of the standing board 3 is manually lifted, and the front part of the standing board 3 rises along the sliding sleeve 4. During the process, the front support leg 1 and the rear support leg 2 rotate relatively and unfold to the extreme position, and the elastic lock head of the connecting rod lock 7 automatically pops into the lock groove of the sliding sleeve 4, and the support rod lock 8 is locked at this time.

[0024] like Figure 4As shown, the surrounding frame 6 is erected on the standing board supporting structure through the support rods 5 on both sides, and the detailed structure is as follows: In this embodiment, the top of the front leg rod on each side of the front supporting leg 1 and the top of the rear leg rod on each side of the rear supporting leg 2 are coaxially connected to the lower end of the corresponding support rod 5 around an axis X1, and a support rod lock 8 is arranged between the top of the front leg rod on each side and the lower end of the corresponding support rod 5.

[0025] In this embodiment, the top of the rear supporting leg 2 is located on the outside of the top of the front supporting leg 1, and there is an unlocking member driving cavity between the two, and an unlocking member 81 that slides axially along an axis X1 is provided in the driving cavity, and a resistance protrusion 82 that spirally resists with the unlocking member 81 is provided on the top of the rear supporting leg 2. When the front supporting leg 1 and the rear supporting leg 2 rotate relatively and approach each other, the resistance protrusion 82 and the unlocking member 81 are matched through the slope to push the unlocking member 81 out along the axial direction of the axis X1 toward the support rod 5, that is, the unlocking member 81 serves as an unlocking power button for the support rod lock 8.

[0026] In this embodiment, the support rod lock 8 includes a first locking groove arranged on the top of the front support leg 1, a second locking groove arranged on the lower end of the support rod 5, a locking member 83 slidably arranged between the first locking groove and the second locking groove, and an elastic member 84 arranged between the locking member 83 and the lower end of the support rod 5. In the locked position, the locking member 83 is inserted into the first locking groove and the second locking groove at the same time. When the unlocking member 81 is pushed out along the axial direction of the axis X1 toward the support rod 5, the locking member 83 can overcome the elastic force of the elastic member 84 and be completely pushed from the first locking groove into the second locking groove, and the support rod lock 8 is unlocked. Figure 5 As shown, the support rod 5 is allowed to move downwards toward the front support leg 1, so that the support rod 5, the front support leg 1 and the rear support leg 2 are folded together and finally folded to the position shown in FIG. Figure 6 That is, when folding, by pressing the two lock elastic buttons and the movable wrench in sequence, the front part of the standing board 3 falls down, the front supporting leg 1 and the rear supporting leg 2 are brought closer together, and the supporting rod lock 8 is driven to unlock in the process, so that the supporting rod 5 is also folded.

[0027] In this embodiment, the left and right sides of the enclosure frame 6 are connected to the top of the corresponding support rod 5 around the four-axis X4 pivot, and there is an enclosure frame lock between the two to lock the rotation relationship. In this embodiment, the enclosure frame lock is an independent locking mechanism. Before pressing the two lock elastic buttons and the movable wrench to open the connecting rod lock 7 in sequence, the enclosure frame locks on both sides need to be unlocked, and the enclosure frame 6 is rotated so that it is in the same vertical plane as the support rod 5. Then, the enclosure frame 6 and the support rod 5 are folded together through the above-mentioned folding method, and the front support leg 1 and the rear support leg 2 are brought closer to achieve full folding. In this embodiment, the enclosure frame lock is a conventional locking mechanism. As long as the mechanism can lock two relatively rotating joints, it can be used here. For example, the structure of the support rod lock 8 in this embodiment can be referred to. However, the button serving as the unlocking power can be directly set at the upper end of the support rod 5, and it can be controlled to unlock by manual pressing.

[0028] In this embodiment, in the unfolded position, a seat cover can be provided on the surrounding frame 6 for a child to sit on, so as to realize the conversion from the climbing ladder to a children's dining chair, increase the use function of the climbing ladder, and improve the utilization rate.

[0029] In this embodiment, the seat cover is made of cloth, including a seat layer, a side enclosure body connected to the front, back, left and right sides of the edge of the seat layer, and two leg holes are formed on the front side of the side enclosure body for the legs of the child to extend. The side enclosure body is provided with two front and rear binding structures that can be detachably mounted on the enclosure frame 6. The front and rear binding structures respectively include a wrapping body with one side fixed to the upper part of the side enclosure body, and the other side of the wrapping body will be able to bypass the rod body of the enclosure frame 6. The binding structure also includes a connecting mechanism that detachably connects the other side of the wrapping body that bypasses the enclosure frame 6 to the side enclosure body. The connecting structure is preferably a zipper, and can also be a buckle, a snap, a strap, etc.

[0030] In order to make the height space between the frame 6 and the standing board 3 suitable for children of different heights and to facilitate the installation of the seat cover to achieve a suitable installation position, in this embodiment, the support rod 5 is a telescopic rod that can be adjusted up and down, such as Figure 3As shown, the support rod 5 includes a support pipe section 51 located at the lower end, a telescopic pipe section 52 that can slide up and down and is arranged in the support pipe section 51, and a telescopic locking mechanism that can lock the support pipe section 51 and the telescopic pipe section 52. The support pipe section 51 is provided with a locking hole. In this embodiment, the telescopic locking mechanism includes an inner sleeve 53 that can slide up and down and is arranged in the telescopic pipe section 52, a locking pin 54 that can be retracted and extended in the locking hole, a traction rope 55 connected between the inner sleeve 53 and the locking pin 54 for controlling the retraction and extension of the locking pin 54, and a telescopic operating member 56 for controlling the inner sleeve 53 to slide up and down. By pulling up the telescopic operating member 56, the inner sleeve 53 is moved upward, so that the traction rope 55 is pulled upward, and the locking pin 54 is retracted from the locking hole to complete unlocking. At this time, the telescopic pipe section 52 can move in the support pipe section 51 to a required position, and the telescopic operating member is released. The spring sleeved on the locking pin 54 can help the locking pin 54 to extend out of the locking hole to achieve locking and positioning.

[0031] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A children's ladder, having an unfolded position and a folded position, characterized in that: It comprises a surrounding frame (6), a support rod (5) for supporting the surrounding frame (6), and a standing board support structure constituting a connecting rod mechanism. The standing board support structure is provided with a connecting rod lock (7) for locking it in the unfolded position, and the standing board support structure comprises a front support leg (1), and a rear support leg (2) whose top is pivotally connected to the top of the front support leg (1) around an axis (X1), and one of the tops of the front support leg (1) and the rear support leg (2) is rotatably connected to the lower end of the support rod (5), and a support rod lock (8) is provided between the lower end of the support rod (5), When the connecting rod lock (7) is in the unlocked position, the front support leg (1) and the rear support leg (2) rotate relative to each other to expand or rotate closer together, thereby controlling the support rod lock (8) to switch between the locked position and the unlocked position.

2. The children's ladder according to claim 1, characterized in that: The standing board support structure further comprises a sliding sleeve (4) slidably arranged on one of the front supporting leg (1) and the rear supporting leg (2), a standing board (3) pivotally connected to the other of the front supporting leg (1) and the rear supporting leg (2) around two axes (X2), and the standing board (3) is also pivotally connected to the sliding sleeve (4) around three axes (X3).

3. The children's climbing ladder according to claim 2, characterized in that: The connecting rod lock (7) is arranged between the sliding sleeve (4) and the standing board (3). When locked, the sliding sleeve (4) is locked in a rotational relationship with the standing board (3) so as to prohibit the sliding sleeve (4) from sliding relative to the front supporting leg (1) or the rear supporting leg (2), thereby locking the standing board supporting structure. An unlocking control mechanism for controlling the unlocking of the connecting rod lock (7) is arranged on the standing board (3).

4. The children's climbing ladder according to claim 2, characterized in that: The connecting rod lock (7) is located below the three axes (X3). When locked, the connecting rod lock (7) and the three axes (X3) are connected in parallel with the center line of the sliding sleeve (4).

5. The children's climbing ladder according to claim 1, characterized in that: An unlocking member driving chamber is provided between the top of the front supporting leg (1) and the top of the rear supporting leg (2), wherein an unlocking member (81) is provided in the driving chamber and slides axially along the axis (X1); a contact convex portion (82) which is spirally contacted with the unlocking member (81) is provided on the other of the top of the front supporting leg (1) and the top of the rear supporting leg (2); when the front supporting leg (1) and the rear supporting leg (2) rotate relative to each other and come close to each other, the contact convex portion (82) and the unlocking member (81) cooperate with each other through a slope, thereby pushing the unlocking member (81) axially along the axis (X1) toward the support rod (5), thereby unlocking the support rod lock (8).

6. The children's climbing ladder according to claim 5, characterized in that: The lower end of the support rod (5) is coaxially connected with the top of the front support leg (1) or the top of the rear support leg (2) around the axis (X1); the support rod lock (8) comprises a first locking groove arranged on one of the top of the front support leg (1) and the top of the rear support leg (2); a second locking groove arranged on the lower end of the support rod (5); a locking member (83) slidably arranged between the first locking groove and the second locking groove; and an elastic member (84) arranged between the locking member (83) and the lower end of the support rod (5); in the locked position, the locking member (83) is inserted into the first locking groove and the second locking groove at the same time; when the unlocking member (81) is pushed out along the axis (X1) toward the support rod (5), the locking member (83) overcomes the elastic force of the elastic member (84) and is completely pushed from the first locking groove into the second locking groove, and the support rod lock (8) is unlocked.

7. The children's climbing ladder according to claim 1, characterized in that: The enclosure frame (6) is pivotally connected to the top of the support rod (5) around a four-axis (X4), and a enclosure frame lock is provided between the two to lock the rotating joint.

8. The children's climbing ladder according to claim 7, characterized in that: The surrounding frame (6) is a square closed surrounding frame, and the top of the support rod (5) is pivotally connected to the middle of the surrounding frame (6) in the front-to-back direction around the four-axis (X4).

9. The children's ladder according to claim 7 or 8, characterized in that: The enclosure frame (6) is provided with a seat cloth cover, the seat cloth cover is made of cloth and comprises a seat layer, a side enclosure body whose lower edge is connected to the edge of the seat layer, and the side enclosure body is provided with at least one binding structure that can be detachably mounted on the enclosure frame (6), the binding structure comprising a wrapping body whose one side is fixed to the upper part of the side enclosure body, and a connecting mechanism that detachably connects the other side of the wrapping body that can bypass the enclosure frame (6) to the lower side enclosure body.

10. The children's climbing ladder according to claim 1, characterized in that: The support rod (5) is a telescopic rod capable of being adjusted up and down, and comprises a support pipe section (51) located at a lower end, a telescopic pipe section (52) arranged in the support pipe section (51) and capable of sliding up and down, and a telescopic locking mechanism capable of locking the support pipe section (51) with the telescopic pipe section (52), wherein the telescopic pipe section (52) is provided with a telescopic operating member (56) for controlling the telescopic locking mechanism.

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