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 utility model belongs to the field of children's products, and particularly relates to a children's ladder. Background Art

[0002] In family life, due to the height limitation of children, they need to use a ladder for washing, toileting or getting things at high places. When this kind of ladder is not in use, it is not convenient to store and occupies a large 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 Utility Model

[0004] The technical problem to be solved by the utility model is to provide a children's ladder.

[0005] To solve the above technical problem, the technical scheme adopted by the utility model is: a children's ladder, which has a deployed position and a folded position, includes an enclosing frame, a support rod for supporting the enclosing frame, and a tread support structure forming a link mechanism. A link lock for locking the tread support structure in the deployed position is arranged on the tread support structure. The tread support structure includes a front support leg, and a rear support leg whose top is pivotally connected to the top of the front support leg around an axis. One of the top of the front support leg and the top of the rear support leg is rotatably connected to the lower end of the support rod, and a support rod lock is arranged between the lower end of the support rod and the top of the front support leg or the top of the rear support leg.

[0006] When the link lock is in the unlocked position, the front support leg and the rear support leg rotate relative to each other to unfold or rotate closer, so as to control the conversion of the support rod lock between the locked position and the unlocked position.

[0007] In some embodiments, the tread support structure further includes a sliding sleeve slidably arranged on one of the front support leg and the rear support leg, and a tread pivotally connected to the other of the front support leg and the rear support leg around a second axis. The tread is also pivotally connected to the sliding sleeve around a third axis.

[0008] In some embodiments, the link lock is arranged between the sliding sleeve and the tread. When locked, the rotational relationship between the sliding sleeve and the tread is locked to prohibit the sliding sleeve from sliding relative to the front support leg or the rear support leg, so as to lock the tread support structure. An unlocking control mechanism for controlling the unlocking of the link lock is arranged on the tread.

[0009] In some embodiments, the position of the link lock is below the third axis. When locked, the connection line between the link lock and the third axis is parallel to the center line of the sliding sleeve.

[0010] In some embodiments, there is an unlocking member driving cavity between the top of the front support leg and the top of the rear support leg. An unlocking member that slides axially along the one axis is disposed in the driving cavity. A resisting convex portion that is in spiral resisting cooperation with the unlocking member is disposed on the other of the top of the front support leg and the top of the rear support leg. When the front support leg and the rear support leg rotate and approach each other, the resisting convex portion and the unlocking member cooperate through a slope to push the unlocking member axially along the one axis towards the support rod, for unlocking the support rod lock.

[0011] 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 one axis. The support rod lock includes a first lock groove disposed on one of the top of the front support leg and the top of the rear support leg, a second lock groove disposed on the lower end of the support rod, a locking member slidably disposed between the first lock groove and the second lock groove, and an elastic member disposed between the locking member and the lower end of the support rod. In the locked position, the locking member is inserted into both the first lock groove and the second lock groove at the same time. When the unlocking member is pushed axially along the one axis towards the support rod, the locking member is completely pushed from the first lock groove into the second lock groove against the elastic force of the elastic member, and the support rod lock is unlocked.

[0012] In some embodiments, the enclosure frame is pivotally connected to the top of the support rod around a four-axis pivot, and there is an enclosure lock between them for locking the rotating joint.

[0013] In some embodiments, the enclosure frame is a square closed enclosure frame, and the top of the support rod is pivotally connected to the middle of the enclosure frame in the front-rear direction around the four-axis pivot.

[0014] In some embodiments, a seat fabric cover is disposed on the enclosure frame. The seat fabric cover is made of fabric and includes a seat layer, and a side enclosure body whose lower edge is connected to the edge of the seat layer. At least one binding structure that can be detachably mounted on the enclosure frame is disposed on the side enclosure body. The binding structure includes a wrapping body whose one edge is fixed to the upper part of the side enclosure body, and a connecting mechanism that detachably connects the other edge of the wrapping body that can bypass the enclosure frame to the lower side enclosure body.

[0015] In some embodiments, the support rod is a telescopic rod that can be adjusted up and down. The support rod includes a support pipe section at the lower end, a telescopic pipe section that can slide up and down and is disposed in the support pipe section, and a telescopic locking mechanism that can lock between the support pipe section and the telescopic pipe section. A telescopic operating member for controlling the telescopic locking mechanism is disposed on the telescopic pipe section.

[0016] The scope of the present utility model is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features. For example, technical solutions formed by mutually replacing the above features with (but not limited to) technical features with similar functions disclosed in the present application, etc.

[0017] Due to the application of the above technical solution, the present utility model has the following advantages compared with the prior art: The present utility model provides a children's climbing ladder with a new folding principle. The front support legs, rear support legs, and standing board, etc. form a linkage mechanism, which can not only stabilize the standing board, but also form a stable support for the entire climbing ladder and be used to support structures such as the upper support rod and surrounding frame; The support rod is rotationally connected to the rotational connection of the front support leg and the rear support leg, and a support rod lock is provided at the same time, so that when the linkage lock is unlocked, the front support leg and the rear support leg move closer to each other relatively, thereby controlling the unlocking of the support rod lock, so that the support rod and the lower linkage mechanism are folded synchronously. The folding operation is convenient, the space occupied after folding is small, it is convenient for storage, and the practicability is strong. Brief Description of the Drawings

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the children's climbing ladder in the unfolded state;

[0019] Figure 2 It is a side view of the structure of the children's climbing ladder in the unfolded state;

[0020] Figure 3 It is a side sectional view of the structure of the children's climbing ladder in the unfolded state;

[0021] Figure 4 It is an exploded schematic diagram of the support rod lock;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the children's climbing ladder during the folding process;

[0023] Figure 6 It is a three-dimensional structural schematic diagram of the children's climbing ladder in the folded state;

[0024] Wherein: 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 cable; 56. Telescopic operating member; 6. Surrounding frame; 7. Linkage lock; 8. Support rod lock; 81. Unlocking member; 82. Contact convex part; 83. Locking member; 84. Elastic member; X1. First axis; X2. Second axis; X3. Third axis; X4. Fourth axis. Detailed Description of the Preferred Embodiment

[0025] As shown in the various drawings, a children's climbing ladder 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 forming a linkage mechanism.

[0026] As Figure 1 shown, the platform support structure includes a U-shaped front support leg 1, a U-shaped rear support leg 2 whose two sides at the top are pivotally connected to the two sides at the top of the front support leg 1 around an axis X1 respectively, two sliding sleeves 4 respectively slidably arranged on the front leg rods on the two sides of the front support leg 1, and a platform 3 whose left and right sides are pivotally connected to the corresponding rear leg rods of the rear support leg 2 around a second axis X2 respectively. The front parts of the left and right sides of the platform 3 are also pivotally connected to the corresponding sliding sleeves 4 around a third axis X3 respectively. In this embodiment, the platform support structure forms a deformable triangular link mechanism when viewed from the side. This link mechanism is simple and has a simple shape.

[0027] A link lock 7 is arranged on the platform support structure to lock it in the unfolded position.

[0028] In this embodiment, the link lock 7 is arranged between the sliding sleeve 4 and the platform 3. When locking, by locking the rotational relationship between the sliding sleeve 4 and the platform 3, the sliding of the sliding sleeve 4 relative to the front support leg 1 is prohibited, thereby locking the platform support structure. As Figure 1 shown, the position of the link lock 7 is below the third axis X3. When locking, the connection line between the lock head of the link lock 7 and the third axis X3 is parallel to the center line of the sliding sleeve 4, making the platform support structure more stable in the locked state. An unlocking control mechanism for controlling the unlocking of the link lock 7 is arranged on the platform 3.

[0029] In this embodiment, the link lock 7 specifically includes elastic lock heads arranged on the two side parts of the platform 3 with a tendency to pop outwards. A lock groove is arranged on the sliding sleeve 4, and the lock head and the lock groove can be arranged in a snap-fit manner. The unlocking control mechanism can control the lock head to retract. Through a movable wrench rotatably or slidably arranged at the rear side of the bottom of the platform 3, a pulling cable is arranged on the wrench, and the end parts of the pulling cable are respectively connected to the two elastic lock heads. By overcoming the elastic force of the elastic lock heads to lift the movable wrench, the pulling cable pulls the corresponding elastic lock heads, and the elastic lock heads retract and exit the lock groove, and the link lock 7 can be unlocked. An elastic button of a secondary lock is also slidably arranged at the rear side part of the platform 3. Under normal locking conditions, the elastic button of the secondary lock blocks the rotational or sliding track path of the movable wrench. Therefore, before pressing the movable wrench, it is necessary to press the elastic button of the secondary lock first to make it deviate from the rotational or sliding track path of the movable wrench, making it safer to use.

[0030] When the link lock 7 is in the unlocked position and needs to be folded, during the process that the platform 3 naturally drops along the sliding sleeve 4 under the action of gravity, the front support leg 1 and the rear support leg 2 rotate relative to each other and approach, thereby controlling the unlocking of the following support rod lock 8. Of course, vice versa. When it needs to be unfolded, manually lift the front part of the platform 3. The front part of the platform 3 rises along the sliding sleeve 4. During the process, the front support leg 1 and the rear support leg 2 rotate relative to each other and unfold to the limit position, and the elastic lock heads of the link lock 7 automatically pop into the lock grooves of the sliding sleeve 4. At this time, the support rod lock 8 is locked.

[0031] As Figure 4 shown, the surrounding frame 6 is mounted on the platform support structure by the support rods 5 on both sides. The detailed structure is as follows: In this embodiment, the top of each front leg rod on each side of the front support leg 1 and the top of each rear leg rod on each side of the rear support leg 2 are coaxially rotatably connected to the lower end of the corresponding support rod 5 around an axis X1, and a support rod lock 8 is provided between the top of each front leg rod and the lower end of the corresponding support rod 5.

[0032] In this embodiment, the top of the rear support leg 2 is located outside the top of the front support leg 1, and there is an unlocking member driving cavity between them. An unlocking member 81 that slides axially along the axis X1 is provided in the driving cavity. A contact convex portion 82 that is in spiral contact and cooperation with the unlocking member 81 is provided on the top of the rear support leg 2. When the front support leg 1 and the rear support leg 2 rotate and approach each other, the contact convex portion 82 and the unlocking member 81 cooperate through a slope to push the unlocking member 81 axially along the axis X1 towards the support rod 5, that is, the unlocking member 81 serves as the unlocking power button of the support rod lock 8.

[0033] In this embodiment, the support rod lock 8 includes a first lock groove provided on the top of the front support leg 1, a second lock groove provided on the lower end of the support rod 5, a locking member 83 slidably disposed between the first lock groove and the second lock groove, and an elastic member 84 provided 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 both the first lock groove and the second lock groove at the same time. When the unlocking member 81 is pushed axially along the axis X1 towards the support rod 5, the locking member 83 can be completely pushed from the first lock groove into the second lock groove against the elastic force of the elastic member 84, and the support rod lock 8 is unlocked, as Figure 5 shown, thereby allowing the support rod 5 to move downward and approach the front support leg 1, realizing the folding of the support rod 5, the front support leg 1, and the rear support leg 2 together, and finally folding to the state as Figure 6 shown. That is, when folding, after successively pressing the two-stage lock elastic button and the movable wrench, the front part of the platform 3 drops, the front support leg 1 and the rear support leg 2 approach each other, and during this process, the support rod lock 8 is driven to unlock, thereby realizing the folding of the support rod 5 as well.

[0034] In this embodiment, the left and right sides of the surrounding frame 6 are pivotally connected to the tops of the corresponding support rods 5 about the fourth axis X4, and there is a surrounding frame lock between them for locking the rotational relationship. In this embodiment, the surrounding frame lock is an independent locking mechanism. Before pressing the two-stage lock elastic button and the movable wrench to open the link lock 7 in sequence, it is necessary to unlock the surrounding frame locks on both sides, rotate the surrounding frame 6 so that it is in the same vertical plane as the support rod 5, and then fold the surrounding frame 6 and the support rod 5 together by the above folding method, and move closer to the front support leg 1 and the rear support leg 2 to achieve full folding. In this embodiment, the surrounding frame lock is a conventional locking mechanism, and any mechanism that can lock two relatively rotating joints can be applied here. For example, reference can be made to the structure of the support rod lock 8 in this embodiment, but the button serving as the unlocking power can be directly arranged at the upper end of the support rod 5, and it can be unlocked by manual pressing.

[0035] In this embodiment, in the unfolded position, a seat fabric cover can be arranged on the surrounding frame 6 for children to sit on, so as to realize the conversion from a climbing ladder to a children's dining chair, increase the usage function of the climbing ladder, and improve the utilization rate.

[0036] In this embodiment, the seat fabric cover is made of fabric and includes a seat layer, and side enclosures that are connected to the front, back, left, and right of the edge of the lower side and the seat layer. Two leg holes for children's legs to extend out are formed on the front side enclosure. There are two front and rear binding structures detachably mounted on the surrounding frame 6 on the side enclosures. The two front and rear binding structures respectively include a wrapping body with one side fixed to the upper part of the side enclosure. The other side of the wrapping body can bypass the rod of the surrounding frame 6. The binding structure also includes a connection mechanism for detachably connecting the other side of the wrapping body that bypasses the surrounding frame 6 to the side enclosure. The connection structure is preferably a zipper, or it can also be a snap fastener, a buckle, a strap, etc.

[0037] In order to make the height space between the surrounding frame 6 and the standing board 3 suitable for children of different heights, and at the same time facilitate the installation of the seat fabric cover to reach 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 in the figure, the support rod 5 includes a support pipe section 51 at the lower end, a telescopic pipe section 52 that is slidably arranged up and down within the support pipe section 51, and a telescopic locking mechanism capable of locking between 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 sliding sleeve 53 that is slidably arranged up and down within the telescopic pipe section 52, a locking pin 54 that can retract and extend within the locking hole, a traction cable 55 connected between the inner sliding 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 up and down sliding of the inner sliding sleeve 53. By pulling up the telescopic operating member 56, the inner sliding sleeve 53 is moved upward, so that the traction cable 55 is pulled upward, and the locking pin 54 retracts from the locking hole to complete unlocking. At this time, the telescopic pipe section 52 can move within the support pipe section 51. After moving to the required position and releasing the telescopic operating member, the spring sleeved on the locking pin 54 can help the locking pin 54 extend out of the locking hole to achieve locking and positioning.

[0038] The above embodiments are only for illustrating the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A children's climbing ladder, having a deployed 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 climbing 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, wherein: 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, wherein: 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, wherein: 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, wherein: The lower end of the support rod (5) is coaxially connected to the top of the front support leg (1) or the top of the rear support leg (2) around the first axis (X1). The support rod lock (8) includes a first lock groove provided on one of the top of the front support leg (1) and the top of the rear support leg (2), a second lock groove provided on the lower end of the support rod (5), a locking member (83) slidably arranged between the first lock groove and the second lock 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 both the first lock groove and the second lock groove. When the unlocking member (81) is axially pushed towards the support rod (5) along the first axis (X1), the locking member (83) is completely pushed from the first lock groove into the second lock groove against the elastic force of the elastic member (84), and the support rod lock (8) is unlocked.

7. The children's climbing ladder according to claim 1, characterized in that: The surrounding frame (6) is pivotally connected to the top of the support rod (5) around the fourth axis (X4), and there is a surrounding frame lock for locking the rotating joint between them.

8. The children's 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 part in the front-rear direction of the surrounding frame (6) around the fourth axis (X4).

9. The children's climbing ladder according to claim 7 or 8, characterized in that: A seat fabric cover is provided on the surrounding frame (6). The seat fabric cover is made of fabric and includes a seat layer, and a side enclosure body whose lower edge is connected to the edge of the seat layer. At least one binding structure that can be detachably mounted on the surrounding frame (6) is provided on the side enclosure body. 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 (6) to the lower side enclosure body.

10. The children's climbing ladder according to claim 1, wherein: The support rod (5) is a telescopic rod that can be adjusted up and down. 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 in the support pipe section (51), a telescopic locking mechanism that can lock between the support pipe section (51) and the telescopic pipe section (52), and a telescopic operation member (56) for controlling the telescopic locking mechanism is provided on the telescopic pipe section (52).

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