Safety lock device of herringbone ladder

Abstract

The utility model relates to a safety lock device of a herringbone ladder, which comprises a herringbone ladder body and is characterized by further comprising a connecting rod, the connecting rod is arranged between two rear ladder rods of the herringbone ladder body; a safety lock device; the safety lock device comprises a mounting seat, a reset structure, a rotating shaft, a buckle and a push block; the mounting seat is arranged at the bottom of the upper pedal, the buckle is arranged on the mounting seat through a rotating shaft and can rotate, the reset structure is arranged on the buckle, and the reset structure drives the buckle to rotate and then reset; the push block is arranged on the upper pedal or the mounting seat and is matched with the buckle to push the buckle to rotate, and the buckle rotates so as to be clamped on the connecting rod to position the herringbone ladder. The herringbone ladder has the advantages that the herringbone ladder can be automatically locked and fixed after being completely opened, and the phenomenon that the herringbone ladder is folded due to separation of the lock catch is avoided; when the herringbone ladder needs to be folded, only the push block needs to be easily pressed to separate the lock catch, and the herringbone ladder is convenient to fold; and the lock catch is large in contact area, fixation is more stable, unlocking is convenient, and use is convenient.

Description

Technical Field

[0001] This utility model relates to a safety lock device for an A-frame ladder. Background Technology

[0002] Existing A-frame ladders include those with and without safety locks. When an A-frame ladder without a safety lock is fully opened, it is prone to closing during movement or use. On the one hand, this poses a risk of pinching hands, and on the other hand, users may fall due to the instability of the ladder, creating a safety hazard. When an A-frame ladder with a safety lock needs to be closed, it requires a certain amount of time and effort to open the safety lock, making it inconvenient to use. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a safety locking device for A-frame ladders. On the one hand, when the A-frame ladder needs to be fully opened, it will automatically lock and fix itself after it is fully opened, and the lock will not come off, thus preventing the A-frame ladder from closing. When the A-frame ladder needs to be closed, it is only necessary to easily press the push block to release the lock, making it easy to close the A-frame ladder. Moreover, the lock has a large contact area, making it more stable and easy to unlock and use.

[0004] To achieve the above objectives, this utility model is implemented as follows: it is actually a safety lock device for an A-frame ladder, including the A-frame ladder body, and also...

[0005] Connecting rod; the connecting rod is located between the two rear steps of the A-frame ladder body and below the upper step of the A-frame ladder body;

[0006] A safety lock device; the safety lock device includes a mounting base, a reset structure, a rotating shaft, a buckle, and a push block; the mounting base is located at the bottom of the upper step, the buckle is mounted on the mounting base via the rotating shaft and is rotatable, the reset structure is located on the buckle, and the reset structure drives the buckle to rotate and reset; the push block is located on the upper step or the mounting base and cooperates with the buckle to push the buckle to rotate, and the buckle rotates to lock onto the connecting rod to position the A-frame ladder.

[0007] In this technical solution, the buckle is provided with a latch, and the latch can be fastened to the connecting rod after the push block pushes the buckle to rotate.

[0008] In this technical solution, a guide slope is provided at the lower part of the buckle, and the guide slope is located below the buckle opening.

[0009] In this technical solution, a push-sloping surface is provided at the end of the buckle near the push block. The push block cooperates with the push-sloping surface, and the push block drives the buckle to rotate.

[0010] In this technical solution, the reset structure is a torsion spring. One end of the torsion spring is located on the buckle, and the other end of the torsion spring abuts against the upper pedal or mounting base. The torsion spring drives the buckle to rotate and reset.

[0011] In this technical solution, the push block includes a block body and a button. The button is located on the block body and extends outward beyond the upper pedal. The block body is located on the upper pedal and cooperates with the buckle to drive the buckle to rotate.

[0012] In this technical solution, a guide block is provided on the mounting base, and a guide groove is provided on the push block. The guide groove and the guide block cooperate to allow the push block to move only in a specific direction.

[0013] In this technical solution, a guide groove is provided on the mounting base, and a guide block is provided on the push block. The guide groove and the guide block cooperate to allow the push block to move only in a specific direction.

[0014] The advantages of this utility model compared with the prior art are as follows: Firstly, when the A-frame ladder needs to be fully opened, it will automatically lock and fix itself after being fully opened, and there will be no retraction. Secondly, when the A-frame ladder needs to be retracted, the lock can be easily released by pressing the push block, making it convenient to retract the A-frame ladder. Furthermore, the lock has a large contact area, making it more stable and easy to unlock and use. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present invention;

[0016] Figure 2 This is a perspective view of the rear view of this utility model;

[0017] Figure 3 This is a perspective view of the safety lock device of this utility model;

[0018] Figure 4 yes Figure 3 Exploded view;

[0019] Figure 5 yes Figure 1 Top view;

[0020] Figure 6 yes Figure 5 AA section view;

[0021] Figure 7 yes Figure 6 A magnified view of part A. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] In this description of the utility model, the terms "one end", "the other end", "upper" and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and do not require the utility model to be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "set up," "connection," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a detachable set, or an integral part; they can refer to a mechanical connection, 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] like Figures 1 to 7 As shown, a safety locking device for an A-frame ladder includes the A-frame ladder body, characterized in that it also includes...

[0026] Connecting rod 3; The connecting rod 3 is located between the two rear steps of the A-frame ladder body and below the upper step 2 of the A-frame ladder body;

[0027] Safety lock device 4; the safety lock device 4 includes a mounting base 41, a reset structure 42, a rotating shaft 43, a buckle 44, and a push block 45; the mounting base 41 is located at the bottom of the upper step 2, the buckle 44 is mounted on the mounting base 41 via the rotating shaft 43 and is rotatable, the reset structure 42 is located on the buckle 44, and the reset structure 42 drives the buckle 44 to rotate and reset; the push block 45 is located on the upper step 2 or the mounting base 41 and cooperates with the buckle 44 to push the buckle 44 to rotate, and the buckle 44 rotates to lock onto the connecting rod 3 to position the A-frame ladder.

[0028] When the A-frame ladder is opened, the upper step 2 swings first, and the bottom of the buckle 44 contacts the connecting rod 3. The connecting rod 3 drives the buckle 44 to rotate. Then, when the buckle 44 rotates to the designated position, the A-frame ladder is fully opened. The buckle 44 of the safety lock device 4 is engaged with the connecting rod 3 and locked. Under the thrust of the reset structure 42, the locking engagement is stable, and the A-frame ladder is completely fixed after opening. The contact area between the buckle 44 and the connecting rod 3 is large.

[0029] When the A-frame ladder is retracted, push the push block 45. The push block 45 causes the buckle 44 to rotate upward. The buckle 44 disengages from the connecting rod 3, and the safety lock device 4 separates from the locking buckle of the connecting rod 3. The A-frame ladder can then be retracted.

[0030] On the one hand, when the A-frame ladder needs to be fully opened, it will automatically lock and secure itself, preventing it from closing. On the other hand, when the A-frame ladder needs to be closed, the lock can be easily released by pressing the lock body, making it convenient to close.

[0031] In this embodiment, the buckle 44 is provided with a buckle opening 441. After the push block 45 pushes the buckle 44 to rotate, the buckle opening 441 can be fastened to the connecting rod 3.

[0032] The buckle 441 can be used to fix the connecting rod 3.

[0033] In this embodiment, a guide slope 442 is provided at the lower part of the buckle 44, and the guide slope 442 is located below the buckle opening 441.

[0034] When the A-frame ladder is opened, the guide ramp 442 contacts the connecting rod 3, and under the guidance of the guide ramp 442, the buckle 44 rotates upward. When the A-frame ladder is fully opened, the buckle 44 rotates downward under the action of the reset structure 42, and the buckle opening 441 completely engages with the connecting rod 3.

[0035] In this embodiment, a push slope 443 is provided at one end of the buckle 44 near the push block 45. The push block 45 cooperates with the push slope 443, and the push block 45 drives the buckle 44 to rotate.

[0036] The end of the push block 45 engages with the push inclined surface 443, causing the buckle 44 to rotate.

[0037] In this embodiment, the reset structure 42 is a torsion spring. One end of the torsion spring is located on the buckle 44, and the other end of the torsion spring abuts against the upper pedal 2 or the mounting base 41. The torsion spring drives the buckle 44 to rotate and reset.

[0038] In this embodiment, the push block 45 includes a block body 451 and a button 452. The button 452 is located on the block body 451 and extends outward beyond the upper pedal 2. The block body 451 is located on the upper pedal 2 and cooperates with the buckle 44 to drive the buckle 44 to rotate.

[0039] In this embodiment, a guide block is provided on the mounting base 41, and a guide groove is provided on the push block 45. The guide groove and the guide block cooperate to allow the push block 45 to move only in a specific direction.

[0040] In this embodiment, a guide groove is provided on the mounting base 41, and a guide block is provided on the push block 45. The guide groove and the guide block cooperate to allow the push block 45 to move only in a specific direction.

[0041] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations of these embodiments without departing from the principles and spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A safety locking device for an A-frame ladder, comprising the A-frame ladder body (1), characterized in that... Also includes Connecting rod (3); The connecting rod (3) is located between the two rear steps of the A-frame ladder body and below the upper step (2) of the A-frame ladder body; Safety lock device (4); The safety lock device (4) includes a mounting base (41), a reset structure (42), a rotating shaft (43), a buckle (44), and a push block (45); The mounting base (41) is located at the bottom of the upper pedal (2), the buckle (44) is mounted on the mounting base (41) via the rotating shaft (43) and can rotate, the reset structure (42) is located on the buckle (44), and the reset structure (42) drives the buckle (44) to rotate and then reset; The push block (45) is located on the upper pedal (2) or the mounting base (41) and cooperates with the buckle (44) to push the buckle (44) to rotate, and the buckle (44) rotates and thus locks on the connecting rod (3) to position the A-frame ladder.

2. A safety lock device for a ladder according to claim 1, characterised in that The buckle (44) is provided with a buckle opening (441). After the push block (45) pushes the buckle (44) to rotate, the buckle opening (441) can be fastened to the connecting rod (3).

3. A safety lock device for a ladder according to claim 2, characterised in that A guide slope (442) is provided at the lower part of the buckle (44), and the guide slope (442) is located below the buckle opening (441).

4. The safety lock device for a ladder according to claim 1, wherein A push slope (443) is provided at one end of the buckle (44) near the push block (45). The push block (45) cooperates with the push slope (443), and the push block (45) drives the buckle (44) to rotate.

5. The safety lock device for a ladder according to claim 1, wherein The reset structure (42) is a torsion spring. One end of the torsion spring is located on the buckle (44), and the other end of the torsion spring abuts against the upper pedal (2) or the mounting base (41). The torsion spring drives the buckle (44) to rotate and reset.

6. The safety lock device for a ladder according to claim 1, wherein The push block (45) includes a block (451) and a button (452). The button (452) is located on the block (451) and extends outward beyond the upper pedal (2). The block (451) is located on the upper pedal (2) and cooperates with the buckle (44) to drive the buckle (44) to rotate.

7. The safety lock device for a ladder according to claim 1, wherein A guide block is provided on the mounting base (41), and a guide groove is provided on the push block (45). The guide groove and the guide block cooperate to make the push block (45) move only in a specific direction.

8. The safety lock device for the A-frame ladder according to claim 1, characterized in that... The mounting base (41) is provided with a guide groove, and the push block (45) is provided with a guide block. The guide groove and the guide block cooperate to make the push block (45) move only in one direction.

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