Anti-turning folding ladder

Abstract

The utility model relates to a climbing tool technical field especially is involved in a kind of folding herringbone ladder of anti-tumbling, including first support ladder frame and second support ladder frame, first support ladder frame and second support ladder frame rotary connection, first support ladder frame is rotationally connected with pedal assembly, second support ladder frame includes reinforcing cross bar and two support ladder bars, the both ends of reinforcing cross bar are fixedly connected with two support ladder bars respectively, pedal assembly and second support ladder frame are rotationally connected with connecting rod mechanism between the common, connecting rod mechanism can be transversely unfolded, and connecting rod mechanism includes first connecting rod, recess for avoiding reinforcing cross bar is provided on first connecting rod;The utility model proposes a kind of folding herringbone ladder of anti-tumbling, solves the problem of pedal everted in the folding process of traditional folding herringbone ladder.

Description

Technical Field

[0001] This utility model relates to the field of climbing tools technology, and in particular to a folding A-frame ladder that is resistant to tipping over. Background Technology

[0002] Ladders are now widely used climbing tools that greatly facilitate people's daily lives. Ladders can be divided into folding ladders and straight ladders.

[0003] Folding A-frame ladders are becoming increasingly widely used. After using a traditional folding A-frame ladder, the user will fold it up. However, when the ladder is folded up to a certain extent or excessively, the tie rod will come into contact with the crossbar, preventing the tie rod from being fully folded up. This causes the steps to flip outwards due to the action of the tie rod, affecting the user experience. Therefore, there is an urgent need in the market for a folding A-frame ladder whose steps do not flip outwards. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes an anti-tipping folding A-frame ladder, which solves the problem of the steps tipping outward during the folding process of traditional folding A-frame ladders.

[0005] The technical solution adopted by this utility model is: a folding A-frame ladder that prevents tipping, including a first support ladder frame and a second support ladder frame, the first support ladder frame and the second support ladder frame are rotatably connected, a step assembly is rotatably connected to the first support ladder frame, the second support ladder frame includes a reinforcing crossbar and two support ladder rods, the two ends of the reinforcing crossbar are respectively fixedly connected to the two support ladder rods, the step assembly and the second support ladder frame are rotatably connected by a linkage mechanism, the linkage mechanism can be unfolded laterally, the linkage mechanism includes a first connecting rod, the first connecting rod is provided with a recess for avoiding the reinforcing crossbar.

[0006] With the above technical solution, when the folding A-frame ladder is fully unfolded, the bottom of the first step rests against the top of the reinforcing crossbar. When the user folds the A-frame ladder, the first and second supporting ladder frames rotate relative to each other, causing the bottom ends of the first and second supporting ladder frames to approach each other. The linkage mechanism can then be folded laterally, with the first connecting rod moving closer to the supporting ladder frame. The recessed part on the first connecting rod effectively avoids the reinforcing crossbar, preventing the first connecting rod and the reinforcing crossbar from contacting each other. This allows the step assembly to be smoothly folded into place on the first supporting ladder frame. By providing a recessed part on the first connecting rod to avoid the reinforcing crossbar, this utility model prevents the step assembly from flipping outwards due to the contact between the first connecting rod and the reinforcing crossbar. This makes it more convenient for users to carry or store the folding A-frame ladder, improving the user experience.

[0007] Furthermore, the recessed portion includes a first connecting segment, a second connecting segment, and a clearance segment. One end of the clearance segment is connected to the first connecting segment, and the other end of the clearance segment is connected to the second connecting segment. A limiting surface is correspondingly provided on the reinforcing crossbar, and the clearance segment and the limiting surface are always separated from each other.

[0008] Through the above technical solution, the avoidance section and the limiting surface are always separated from each other, so that the first connecting rod will not come into contact with the reinforcing crossbar, thereby allowing the pedal assembly to be smoothly retracted into place and preventing the pedal assembly from flipping outward.

[0009] Furthermore, the first connecting segment, the second connecting segment, and the avoidance segment are formed with grooves, which are capable of avoiding the reinforcing crossbar.

[0010] With the above technical solution, when the user folds up the A-frame ladder, the groove formed by the first connecting section, the second connecting section and the avoidance section can fully avoid the reinforcing crossbar, preventing the first connecting bar and the reinforcing crossbar from colliding.

[0011] Furthermore, the first connecting segment and the second connecting segment are arranged symmetrically with respect to the groove.

[0012] Through the above technical solution, the relatively set first connecting segment and second connecting segment can minimize the impact of the crossbar on the first connecting rod when it is retracted and deviates, and allow the groove to better avoid the reinforcing crossbar.

[0013] Furthermore, the pedal assembly includes a first pedal and a second pedal, with the first pedal located above the second pedal. Both the first pedal and the second pedal are rotatably connected to the first support ladder frame. The linkage mechanism further includes a second connecting rod, with one end of the first connecting rod rotatably connected to the first pedal and the other end of the first connecting rod rotatably connected to the second pedal. One end of the second connecting rod is rotatably connected to the first connecting rod, and the other end of the second connecting rod is rotatably connected to the support ladder rod.

[0014] With the above technical solution, when the user unfolds the folding A-frame ladder, the first and second support ladder frames are driven to rotate relative to each other, so that the bottom ends of the first and second support ladder frames move away from each other. The rotating second support ladder frame drives the second connecting rod to rotate, and the rotating second connecting rod drives the first connecting rod to rotate. The first and second steps unfold under the action of the first connecting rod until the first and second steps rotate to a suitable position on the first support ladder frame. Then the user can use the folding A-frame ladder to climb. The folding A-frame ladder of this utility model has a simple structure and is relatively convenient to use. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the first connecting rod structure of this utility model;

[0018] Figure 3 This is one of the schematic diagrams of the folded state of this utility model;

[0019] Figure 4 This is the second schematic diagram of the folded state of this utility model;

[0020] The utility model reference information is as follows:

[0021] 1. First supporting ladder frame; 2. Second supporting ladder frame; 3. Reinforcing crossbar; 4. Supporting ladder rod; 5. First connecting rod; 6. Second connecting rod; 7. Recessed part; 8. First connecting section; 9. Second connecting section; 10. Clearance section; 11. Limiting surface; 12. Groove; 13. First step; 14. Second step;

[0022] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0025] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0026] See Figures 1-4 As shown, an anti-tipping folding A-frame ladder includes a first support ladder frame 1 and a second support ladder frame 2, which are rotatably connected. A footboard assembly is rotatably connected to the first support ladder frame 1. The second support ladder frame 2 includes a reinforcing crossbar 3 and two support ladder rods 4. The two ends of the reinforcing crossbar 3 are fixedly connected to the two support ladder rods 4 respectively. A linkage mechanism is rotatably connected between the footboard assembly and the second support ladder frame 2. The linkage mechanism can be unfolded laterally. The linkage mechanism includes a first connecting rod 5, which has a recess 7 for avoiding the reinforcing crossbar 3. When the folding A-frame ladder is fully unfolded, the bottom of the first step 13 rests against the top of the reinforcing crossbar 3. When the user folds up the A-frame ladder, the first support frame 1 and the second support frame 2 rotate relative to each other, causing the bottom ends of the first support frame 1 and the second support frame 2 to approach each other. The linkage mechanism can then be folded laterally, and the first connecting rod 5 moves closer to the support ladder bar 4. The recess 7 on the first connecting rod 5 effectively avoids the reinforcing crossbar 3, preventing the first connecting rod 5 and the reinforcing crossbar 3 from contacting each other. This allows the step assembly to be smoothly folded into place on the first support frame 1. By providing a recess 7 on the first connecting rod 5 to avoid the reinforcing crossbar 3, this invention prevents the step assembly from flipping outwards due to the contact between the first connecting rod 5 and the reinforcing crossbar 3. This makes it more convenient for users to carry or store the folding A-frame ladder, improving the user experience.

[0027] See Figures 1-3 As shown, the recessed portion 7 includes a first connecting section 8, a second connecting section 9, and a clearance section 10. One end of the clearance section 10 is connected to the first connecting section 8, and the other end of the clearance section 10 is connected to the second connecting section 9. A limiting surface 11 is correspondingly provided on the reinforcing crossbar 3. The clearance section 10 and the limiting surface 11 are always separated from each other. The fact that the clearance section 10 and the limiting surface 11 are always separated from each other ensures that the first connecting rod 5 will not come into contact with the reinforcing crossbar 3, thereby allowing the pedal assembly to be smoothly retracted into place and preventing the pedal assembly from flipping outward.

[0028] See Figure 2As shown, the first connecting section 8, the second connecting section 9, and the avoidance section 10 form a groove 12, which can avoid the reinforcing crossbar 3. When the user folds up the A-frame ladder, the groove 12 formed by the first connecting section 8, the second connecting section 9, and the avoidance section 10 can fully avoid the reinforcing crossbar 3, preventing the first connecting rod 5 and the reinforcing crossbar 3 from colliding or bumping against each other.

[0029] See Figure 2 As shown, the first connecting segment 8 and the second connecting segment 9 are symmetrically arranged with respect to the groove 12. The symmetrical arrangement of the first connecting segment 8 and the second connecting segment 9 minimizes the impact between the first connecting rod 5 and the reinforcing crossbar 3 when the first connecting rod 5 deviates during retraction, allowing the groove 12 to better avoid the reinforcing crossbar 3.

[0030] See Figure 1 , 3 As shown in Figure 4, the pedal assembly includes a first pedal 13 and a second pedal 14. The first pedal 13 is located above the second pedal 14. Both the first pedal 13 and the second pedal 14 are rotatably connected to the first support ladder frame 1. The linkage mechanism also includes a second connecting rod 6. One end of the first connecting rod 5 is rotatably connected to the first pedal 13, and the other end of the first connecting rod 5 is rotatably connected to the second pedal 14. One end of the second connecting rod 6 is rotatably connected to the first connecting rod 5, and the other end of the second connecting rod 6 is rotatably connected to the support ladder rod 4. When the user unfolds the folding A-frame ladder, the first support ladder frame 1 and the second support ladder frame 2 are driven to rotate relative to each other, so that the bottom ends of the first support ladder frame 1 and the bottom ends of the second support ladder frame 2 move away from each other. The rotating second support ladder frame 2 drives the second connecting rod 6 to rotate, and the rotating second connecting rod 6 drives the first connecting rod 5 to rotate. The first step 13 and the second step 14 are unfolded under the action of the first connecting rod 5 until the first step 13 and the second step 14 are rotated to a suitable position on the first support ladder frame 1. Then the user can use the folding A-frame ladder to climb. The folding A-frame ladder of this utility model has a simple structure and is relatively convenient to use.

[0031] In use, the user drives the first support ladder 1 and the second support ladder 2 to rotate relative to each other, so that the bottom ends of the first support ladder 1 and the second support ladder 2 move away from each other. The linkage mechanism can then be folded laterally. The rotating second support ladder 2 drives the second connecting rod 6 to rotate, and the rotating second connecting rod 6 drives the first connecting rod 5 to rotate. The first step 13 and the second step 14 unfold under the action of the first connecting rod 5. The recess 7 on the first connecting rod 5 can effectively avoid the reinforcing crossbar 3, preventing the first connecting rod 5 and the reinforcing crossbar 3 from abutting each other. This allows the first step 13 and the second step 14 to be smoothly folded into place on the first support ladder 1. Once the first step 13 and the second step 14 have rotated to the appropriate position on the first support ladder 1, the user can use the folding A-frame ladder to climb.

[0032] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A folding A-frame ladder designed to prevent tipping, comprising a first support ladder frame (1) and a second support ladder frame (2), wherein the first support ladder frame (1) and the second support ladder frame (2) are rotatably connected, characterized in that: The first support ladder frame (1) is rotatably connected to a footboard assembly. The second support ladder frame (2) includes a reinforcing crossbar (3) and two supporting ladder rods (4). The two ends of the reinforcing crossbar (3) are fixedly connected to the two supporting ladder rods (4) respectively. The footboard assembly and the second support ladder frame (2) are rotatably connected to a linkage mechanism. The linkage mechanism can be extended laterally. The linkage mechanism includes a first connecting rod (5). The first connecting rod (5) is provided with a recess (7) for avoiding the reinforcing crossbar (3).

2. The anti-tipping folding A-frame ladder according to claim 1, characterized in that: The recessed portion (7) includes a first connecting section (8), a second connecting section (9), and a clearance section (10). One end of the clearance section (10) is connected to the first connecting section (8), and the other end of the clearance section (10) is connected to the second connecting section (9). A limiting surface (11) is correspondingly provided on the reinforcing crossbar (3). The clearance section (10) and the limiting surface (11) are always separated from each other.

3. The anti-tipping folding A-frame ladder according to claim 2, characterized in that: The first connecting segment (8), the second connecting segment (9) and the avoidance segment (10) are formed with grooves (12), which are able to avoid the reinforcing crossbar (3).

4. The anti-tipping folding A-frame ladder according to claim 3, characterized in that: The first connecting segment (8) and the second connecting segment (9) are symmetrically arranged with respect to the groove (12).

5. A folding A-frame ladder with anti-tipping mechanism according to claim 3 or 4, characterized in that: The pedal assembly includes a first pedal (13) and a second pedal (14). The first pedal (13) is located above the second pedal (14). Both the first pedal (13) and the second pedal (14) are rotatably connected to the first support ladder frame (1). The linkage mechanism also includes a second connecting rod (6). One end of the first connecting rod (5) is rotatably connected to the first pedal (13), and the other end of the first connecting rod (5) is rotatably connected to the second pedal (14). One end of the second connecting rod (6) is rotatably connected to the first connecting rod (5), and the other end of the second connecting rod (6) is rotatably connected to the support ladder rod (4).

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