Telescopic base and ladder

Abstract

The utility model discloses a telescopic base and a ladder, and the telescopic base comprises a transverse plate which is of a hollow structure; the lengthened transverse plates are arranged on the two sides of the transverse plate and can be inserted into the two ends of the transverse plate in a sliding mode respectively. And the positioning mechanism is arranged between the transverse plate and the lengthened transverse plate and is used for locking the lengthened transverse plate at a stretching or storing position relative to the transverse plate. The utility model provides a telescopic base and a ladder. On the basis of a conventional transverse plate with a limited size, the lengthened transverse plate is designed, so that the lengthened transverse plate can be pulled out on the basis of the original transverse plate, the supporting width of the bottom of the whole ladder can be increased, the stability of the whole ladder in operation is improved, meanwhile, the lengthened transverse plate can be pushed into the transverse plate after application to form a storage effect, and the whole ladder is convenient to use. In this way, the carrying portability of the device is not affected.

Description

Technical Field

[0001] This utility model relates to the field of ladder technology, and in particular to a telescopic base and a ladder. Background Technology

[0002] When working at a certain height, due to the limited height of the human body, it is necessary to use external objects to raise the working height. The most commonly used auxiliary tool is a ladder. In order to ensure its stability and portability, conventional ladders are mostly designed to consist of two ladder bodies that can be unfolded at a certain angle. Since the size of the ladder itself is fixed, the size of its base is adapted to the width of the ladder itself. This results in a limited area of ​​the base when it is actually supported. For narrower ladders, the stability of the placement will be poor, which poses certain safety hazards. Therefore, a telescopic base and ladder are proposed. Utility Model Content

[0003] Based on this, it is necessary to provide a telescopic base and ladder to address the above-mentioned technical problems. This application designs an extended horizontal plate based on the conventional limited-size horizontal plate. This allows the extended horizontal plate to be pulled out from the original horizontal plate, thereby increasing the support width of the bottom of the ladder and improving its stability during operation. At the same time, the extended horizontal plate can be pushed back into the horizontal plate after use to form a storage effect, which does not affect its portability.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A telescopic base, comprising:

[0006] A horizontal plate, wherein the horizontal plate is a hollow structure;

[0007] An extended horizontal plate is provided on both sides of the horizontal plate and can be slidably inserted into both ends of the horizontal plate respectively;

[0008] A positioning mechanism, located between the horizontal plate and the extended horizontal plate, is used to lock the extended horizontal plate in a stretched or retracted position relative to the horizontal plate.

[0009] Furthermore, the positioning mechanism includes an elastic steel sheet disposed within the extended horizontal plate, and an elastic buckle is fixed to the surface of the elastic steel sheet, the elastic buckle penetrating the side wall of the extended horizontal plate;

[0010] The surface of the horizontal plate is provided with buckle holes. Under the action of the elastic steel sheet, the elastic buckle can be inserted into the corresponding buckle hole to fix the relative position of the horizontal plate and the extended horizontal plate.

[0011] Furthermore, the buckle hole includes a first positioning hole and a second positioning hole, and there are two of each of the first positioning hole and the second positioning hole. The two first positioning holes and the second positioning holes are distributed on the horizontal plate on the trajectory of the elastic buckle sliding horizontally.

[0012] When the elastic buckle is inserted into the first positioning hole, the extended horizontal plate is in the storage position; when the elastic buckle is inserted into the second positioning hole, the extended horizontal plate is in the stretching position.

[0013] Furthermore, the positioning mechanism includes:

[0014] A locking port penetrating the extended horizontal plate;

[0015] A sliding shaft is provided on the surface of the horizontal plate, and the inner end of the sliding shaft can be engaged in the locking hole to fix the position of the horizontal plate and the extended horizontal plate.

[0016] Furthermore, the positioning mechanism also includes a protective part formed on the surface of the horizontal plate, one end of the pull shaft passes through the protective part and is connected to a pull ring, and the other end of the pull shaft is formed with a bushing;

[0017] The locking port is adapted to the bushing.

[0018] Furthermore, a spring is sleeved on the surface of the pull shaft, with one end of the spring abutting against the side wall of the protective part and the other end fixed to the surface of the bushing.

[0019] Furthermore, the positioning mechanism includes:

[0020] Holes formed on the surface of the extended cross plate;

[0021] A threaded post is threaded onto the surface of the horizontal plate. Rotating the threaded post so that one end is threaded into the hole can fix the relative position between the extended horizontal plate and the horizontal plate.

[0022] A rotating handle, which is fixed to one end of the threaded post.

[0023] Furthermore, a foot cover is fitted onto the end of the extended horizontal plate away from the horizontal plate.

[0024] A ladder includes a telescopic base and ladder bodies fitted onto both sides of the surface of a crossbeam;

[0025] The surface of the ladder is provided with screws, and one end of the screw passes through the cross plate and the extended cross plate and is placed on the other side of the ladder with a nut threaded on it.

[0026] Furthermore, the extended cross plate has a slide rail on its outer side, and the screw is located inside the slide rail to limit the sliding distance of the extended cross plate relative to the cross plate.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The telescopic base and ladder provided by this utility model are based on the conventional limited size of the horizontal plate, and the design of the extended horizontal plate is carried out. In this way, the extended horizontal plate can be pulled out from the original horizontal plate, which can increase the support width of the bottom of the ladder and improve its stability during operation. At the same time, the extended horizontal plate can be pushed into the horizontal plate after use to form a storage effect, so as not to affect the portability.

[0029] By setting up a positioning mechanism, when the extended horizontal plate slides inside the horizontal plate, it can both limit and fix the extended horizontal plate in the stored state, and at the same time provide positioning support for the extended horizontal plate in the unfolded support state. This ensures that the position of the extended horizontal plate relative to the horizontal plate is fixed, further improving the support effect. Attached Figure Description

[0030] Figure 1 A schematic diagram of the structure of the telescopic base and ladder provided by this utility model;

[0031] Figure 2 A schematic diagram of the internal positioning mechanism structure of Embodiment 2 of the telescopic base and ladder provided by this utility model;

[0032] Figure 3 A schematic diagram of the disassembled state of the internal positioning mechanism in Embodiment 2 of the telescopic base and ladder provided by this utility model;

[0033] Figure 4 A schematic diagram of the internal positioning mechanism structure of Embodiment 3 of the telescopic base and ladder provided by this utility model;

[0034] Figure 5 A schematic diagram of the second form of the internal positioning mechanism in Embodiment 3 of the telescopic base and ladder provided by this utility model;

[0035] Figure 6 The telescopic base and ladder provided by this utility model Figure 5 Enlarged structural diagram at point A in the middle;

[0036] Figure 7 A schematic diagram of the internal positioning mechanism structure in Embodiment 4 of the telescopic base and ladder provided by this utility model;

[0037] Figure 8 A schematic diagram of the disassembly structure of the internal positioning mechanism in Embodiment 4 of the telescopic base and ladder provided by this utility model;

[0038] Figure 9 The telescopic base and ladder provided by this utility model Figure 8Enlarged structural diagram at point B;

[0039] Figure 10 A schematic diagram illustrating the application state of the telescopic base and ladder provided by this utility model.

[0040] The markings in the diagram are explained as follows:

[0041] Horizontal plate 100, buckle hole 110, first positioning hole 111, second positioning hole 112;

[0042] Locking port 120;

[0043] Hole 130;

[0044] Extended horizontal plate 200, elastic steel sheet 210, elastic buckle 211;

[0045] Pull shaft 220, protective part 221, pull ring 222, bushing 223, spring 224;

[0046] Threaded post 230, rotating handle 231;

[0047] Slide rail 240;

[0048] Positioning mechanism 300;

[0049] Shoe covers 400;

[0050] 500mm ladder body;

[0051] Screw 600, nut 610. Detailed Implementation

[0052] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0053] Example 1

[0054] Please refer to Figures 1-10 A telescopic base includes: a horizontal plate 100, wherein the horizontal plate 100 is a hollow structure;

[0055] An extended horizontal plate 200 is provided on both sides of the horizontal plate 100 and can be slidably inserted into both ends of the horizontal plate 100 respectively.

[0056] A positioning mechanism 300 is disposed between the horizontal plate 100 and the extended horizontal plate 200, and is used to lock the extended horizontal plate 200 in a stretched or retracted position relative to the horizontal plate 100.

[0057] In this embodiment, an extended horizontal plate 200 is designed inside the horizontal plate 100 based on the conventional fixed width base. In actual application, the extended horizontal plate 200 can be pulled out and combined with the horizontal plate 100 to form a base, thereby increasing the width of the overall base. Compared with the conventional base, it can effectively increase the support area and ensure stability in application.

[0058] Meanwhile, since the extended horizontal plate 200 can slide inside the horizontal plate 100, when it is necessary to carry or transport it, the extended horizontal plate 200 can be pushed into the interior of the horizontal plate 100 to form a storage state. In this way, the overall width of the base is close to the width of the upper ladder 500, so that the size is too large and the portability is not compromised.

[0059] Example 2

[0060] The telescopic base provided in Embodiment 1 is further optimized, specifically, as follows: Figure 1 , Figure 2 and Figure 3 As shown, the positioning mechanism 300 includes an elastic steel sheet 210 disposed within the extended horizontal plate 200. An elastic buckle 211 is fixed on the surface of the elastic steel sheet 210. The elastic buckle 211 penetrates the side wall of the extended horizontal plate 200. Due to the elasticity of the elastic steel sheet 210 itself, the elastic buckle 211 will press against and penetrate the side wall of the extended horizontal plate 200. Because there is a through groove at the position of the elastic buckle 211 on the side wall of the extended horizontal plate 200, the elastic buckle 211 can be popped out.

[0061] The surface of the horizontal plate 100 is provided with buckle holes 110. Under the action of the elastic steel sheet 210, the elastic buckle 211 can be inserted into the corresponding buckle hole 110 to fix the relative position of the horizontal plate 100 and the extended horizontal plate 200.

[0062] The buckle hole 110 includes a first positioning hole 111 and a second positioning hole 112. There are two of each of the first positioning hole 111 and the second positioning hole 112. The two first positioning holes 111 and the second positioning holes 112 are distributed on the horizontal plate 100 on the trajectory of the horizontal sliding of the elastic protrusion buckle 211.

[0063] When the extended horizontal plate 200 is stored inside the horizontal plate 110, the elastic buckle 211 will be engaged in the first hole 111 on the surface of the extended horizontal plate 200. In this way, the limiting effect of the elastic buckle 211 and the first positioning hole 111 can ensure the stability of the relative position between the extended horizontal plate 200 and the horizontal plate 100, so that it is stably in the stored state.

[0064] Similarly, when it is necessary to extend the overall support area of ​​the base, the extended horizontal plate 200 is pulled outward. At this time, the elastic buckle 211 inside the extended horizontal plate 200, which is pulled, will abut against the side wall of the first positioning hole 111. The elastic buckle 211, which is abutted against the inside of the extended horizontal plate 200, will then move to the position of the second positioning hole 112 after the extended horizontal plate 200 is safely pulled outward. At this time, the elastic buckle 211 is popped out by the elastic steel sheet 210, so that the elastic buckle 211 and the second positioning hole 112 are engaged, thereby achieving the positioning of the extended horizontal plate 200 after it is unfolded.

[0065] Example 3

[0066] The telescopic base provided in Embodiment 1 has been further optimized, such as... Figure 4 , Figure 5 and Figure 6 As shown, the positioning mechanism 300 includes:

[0067] A locking port 120 penetrating the extended horizontal plate 200;

[0068] The pull shaft 220, which is slidably disposed on the surface of the horizontal plate 100, can fix the position of the horizontal plate 100 and the extended horizontal plate 200 by engaging the inner end of the pull shaft 220 into the locking hole 120.

[0069] The positioning mechanism 300 also includes a protective part 221 formed on the surface of the horizontal plate 100. One end of the pull shaft 220 passes through the protective part 221 and is connected to a pull ring 222. The other end of the pull shaft 220 is formed with a bushing 223.

[0070] Both the pull shaft 220 and the bushing 223 are slidably disposed inside the protective part 221 and can slide freely within it. Since the outer diameter of the bushing 223 is slightly larger than the outer diameter of the pull shaft 220, the pull shaft 220 can extend outside the protective part 221 while ensuring that the bushing 223 is always located inside the protective part 221, thus preventing the pull shaft 220 from detaching.

[0071] Wherein, the locking port 120 is adapted to the bushing 223. In this embodiment, there are two locking ports 120 on a single extended horizontal plate 200. The locking port 120 at the outer end (away from the horizontal plate 100) of the positioning mechanism 300 can form a positioning and storage of the extended horizontal plate 200, and the locking port 120 at the inner end (close to the horizontal plate 100) can form a positioning effect for the extended horizontal plate 200 after it is unfolded.

[0072] like Figure 6 A spring 224 is sleeved on the surface of the pull shaft 220 shown. One end of the spring 224 abuts against the side wall of the protective part 221, and the other end is fixed to the surface of the bushing 223. Due to the elastic support of the spring 224 itself, the inner end of the pull shaft 220 always tends to move toward the extended horizontal plate 200.

[0073] like Figure 4 As shown, the extended horizontal plate 200 is in the retracted state at this time. The bushing 223 is inserted into the locking port 120 at the outer end. When the pull ring 222 is pulled to overcome the elastic force of the spring 224, the bushing 223 is disengaged from the corresponding locking port 120. The extended horizontal plate 200 can then be pulled outward to unfold relative to the horizontal plate 100. When the extended horizontal plate 200 slides into place, the pull ring 222 is opened. The bushing 223, under the action of the spring 224, will be inserted into the locking port 120 at the inner end of the extended horizontal plate 200 to limit the unfolded base.

[0074] Example 4

[0075] The telescopic base provided in Embodiment 1 has been further optimized, such as... Figure 7 , Figure 8 and Figure 9 As shown, the positioning mechanism 300 includes:

[0076] Holes 130 formed on the surface of the extended horizontal plate 200;

[0077] The threaded post 230 is threaded onto the surface of the horizontal plate 100. Rotating the threaded post 230 so that one end is threaded into the hole 130 can fix the relative position between the extended horizontal plate 200 and the horizontal plate 100.

[0078] In this embodiment, the number of holes 130 on the surface of the extended horizontal plate 200 is also two, the same as the locking hole 120 in the above embodiment three. One hole 130 is distributed at the inner end of the extended horizontal plate 200, and the other hole 130 is distributed at the outer end of the extended horizontal plate 200.

[0079] like Figure 7As shown, the extended horizontal plate 200 is in the storage state at this time. In this state, the threaded post 230 on the surface of the horizontal plate 100 corresponds to the hole 130 at the outer end of the extended horizontal plate 200. Rotating the threaded post 230 can insert one end of it into the corresponding hole 130 to form a limiting state.

[0080] Similarly, such as Figure 8 As shown, after the extended horizontal plate 200 is pulled outward, the inner end hole 130 is aligned with the threaded post 230. Rotating the threaded post 230 allows one end of it to be inserted into the corresponding hole 130, thus forming a positioning function for the unfolded base.

[0081] Furthermore, a rotating handle 231 is fixed to one end of the threaded post 230. Rotating the rotating handle 231 facilitates the rotation drive of the corresponding threaded post 230. It should be noted that in this embodiment, the surface of the horizontal plate 100 has a corresponding protrusion at the position corresponding to the threaded post 230. The protrusion increases the area of ​​threaded connection between the threaded post 230 and the horizontal plate 100, thereby improving the positioning effect of the threaded post 230 itself.

[0082] Example 5

[0083] The telescopic base provided in Embodiment 1 has been further optimized, such as... Figure 1 As shown, a foot cover 400 is fitted onto the end of the extended horizontal plate 200 away from the horizontal plate 100;

[0084] The bottom end of the foot cover 400 is flush with the bottom end of the horizontal plate 100. This way, after the extended horizontal plate 200 is unfolded, the foot cover 400 and the horizontal plate 100 can be on the same horizontal plane, which can ensure the overall stability of the base when it is placed.

[0085] Example 6

[0086] A ladder includes a telescopic base as described in Embodiments 1, 2, 3, 4 and 5 above, and a ladder body 500 sleeved on both sides of the surface of the horizontal plate 100. In this embodiment, only a portion of the main body of the ladder is shown, and the steps on the ladder body 500 are omitted, as they are common technical knowledge known to those skilled in the art. Therefore, no further elaboration is required in this embodiment.

[0087] like Figure 10 As shown, the ladders 500 on the two adjacent horizontal plates 100 are hinged to each other, so that the two ladders 500 can be opened to achieve the placement state. It should be noted that a pull rope (not shown in the figure) can be connected between the two ladders 500 to adjust the unfolding angle.

[0088] Furthermore, a screw 600 is provided on the surface of the ladder 500, and one end of the screw 600 passes through the cross plate 100 and the extended cross plate 200 and is threaded with a nut 610 on the other side of the ladder 500.

[0089] The extended horizontal plate 200 has a slide rail 240 on its outer side, and the screw 600 is located in the slide rail 240 to limit the sliding distance of the extended horizontal plate 200 relative to the horizontal plate 100.

[0090] The design of the slide rail 240 can limit the unfolding position of the extended horizontal plate 200, preventing it from completely detaching from the horizontal plate 100;

[0091] When the extended horizontal plate 200 is fully extended, the inner end of the slide rail 240 abuts against the corresponding screw 600, thus preventing the extended horizontal plate 200 from being pulled outwards. When the extended horizontal plate 200 is retracted, the outer end of the slide rail 240 abuts against the corresponding screw 600, thus preventing the extended horizontal plate 200 from being retracted inwards.

[0092] At the same time, when the screw 600 contacts either end of the slide rail 240, the positioning mechanism 300 is in the corresponding positioning state, which will not affect its own positioning after unfolding or retracting.

[0093] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0094] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A telescopic base, characterized in that, It includes: A horizontal plate (100) is a hollow structure. An extended horizontal plate (200) is provided on both sides of the horizontal plate (100) and can be slidably inserted into both ends of the horizontal plate (100); A positioning mechanism (300) is provided between the horizontal plate (100) and the extended horizontal plate (200) for locking the extended horizontal plate (200) in a stretched or retracted position relative to the horizontal plate (100).

2. A telescopic base according to claim 1, characterized in that, The positioning mechanism (300) includes an elastic steel sheet (210) disposed in the extended horizontal plate (200), and an elastic buckle (211) is fixed on the surface of the elastic steel sheet (210), and the elastic buckle (211) penetrates the side wall of the extended horizontal plate (200); The surface of the horizontal plate (100) is provided with buckle holes (110). Under the action of the elastic steel sheet (210), the elastic buckle (211) can be inserted into the corresponding buckle hole (110) to fix the relative position of the horizontal plate (100) and the extended horizontal plate (200).

3. A telescopic base according to claim 2, characterized in that, The buckle hole (110) includes a first positioning hole (111) and a second positioning hole (112). There are two of each of the first positioning hole (111) and the second positioning hole (112). The two first positioning holes (111) and the two positioning holes (112) are distributed on the horizontal plate (100) on the trajectory of the horizontal sliding of the elastic buckle (211). When the elastic buckle (211) is inserted into the first positioning hole (111) and the extended horizontal plate (200) is in the storage position, when the elastic buckle (211) is inserted into the second positioning hole (112) and the extended horizontal plate (200) is in the stretching position.

4. A telescopic base according to claim 1, characterized in that, The positioning mechanism (300) includes: Locking port (120) through the extended cross plate (200); The pull shaft (220) slidably disposed on the surface of the horizontal plate (100) can fix the position of the horizontal plate (100) and the extended horizontal plate (200) by inserting the inner end of the pull shaft (220) into the locking hole (120).

5. A telescopic base according to claim 4, characterized in that, The positioning mechanism (300) also includes a protective part (221) formed on the surface of the horizontal plate (100), one end of the pull shaft (220) passes through the protective part (221) and is connected to a pull ring (222), and the other end of the pull shaft (220) is formed with a bushing (223). The locking port (120) is adapted to the bushing (223).

6. A telescopic base according to claim 5, characterized in that, A spring (224) is fitted on the surface of the pull shaft (220). One end of the spring (224) abuts against the side wall of the protective part (221), and the other end is fixed to the surface of the bushing (223).

7. A telescopic base according to claim 1, characterized in that, The positioning mechanism (300) includes: Holes (130) formed on the surface of the extended cross plate (200); The threaded post (230) is threaded onto the surface of the horizontal plate (100). By rotating the threaded post (230) so that one end of it is threaded into the hole (130), the relative position between the extended horizontal plate (200) and the horizontal plate (100) can be fixed. A rotating handle (231) is fixed to one end of the threaded post (230).

8. A telescopic base according to claim 7, characterized in that, The extended horizontal plate (200) is fitted with a foot cover (400) at the end away from the horizontal plate (100).

9. A ladder comprising a telescopic base as described in any one of claims 1-8, characterized in that, It also includes ladders (500) fitted on both sides of the surface of the horizontal plate (100), and the ladders (500) on the two adjacent horizontal plates (100) are hinged to each other; The surface of the ladder (500) is provided with screws (600), and one end of the screws (600) passes through the cross plate (100) and the extended cross plate (200) and is placed on the other side of the ladder (500) with a nut (610) threaded on it.

10. A ladder according to claim 9, characterized in that, The extended cross plate (200) has a slide rail (240) on its outer side, and the screw (600) is located in the slide rail (240) to limit the sliding distance of the extended cross plate (200) relative to the cross plate (100).

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