A mechanical locking mechanism for locking perpendicular to the folding direction of a portable ladder

Abstract

The present invention provides a mechanical locking mechanism for locking perpendicular to the folding direction of a portable ladder, the locking mechanism comprises a lower folding body 1 and an upper folding body 9, the lower folding body 1 and the upper folding body 9 are connected by a rotating shaft 16, a lock buckle installation groove 17 is provided on the side of the upper folding body 9, a lock buckle embedding groove 18 is provided on the side of the lower folding body 1, a primary lock buckle 5 is rotatably connected to the lower part of the lock buckle installation groove 17, a secondary lock buckle limiter 6 is rotatably connected to the middle part of the primary lock buckle 5, a secondary lock buckle limiter 6 is rotatably connected to the secondary lock buckle 2, one end of the secondary lock buckle 2 is a tongue portion, the middle is a connecting portion, and the other end is a release portion, the connecting portion is rotatably connected to the secondary lock buckle limiter 6, and a limit lock 10 is provided on the upper part of the lock buckle embedding groove 18 for locking in cooperation with the tongue portion. The present invention adopts a secondary locking, the locking is firm; the unlocking action is simple, and the operation can be completed by pressing once; after locking and unlocking, the structure is all in the body, and there is no exposed structure.

Description

Technical Field

[0001] The invention relates to a locking mechanism of a portable ladder, in particular to a mechanical locking mechanism for locking perpendicularly to the folding direction of the portable ladder. Background Art

[0002] Ladders are commonly used tools for climbing heights. Foldable ladders are easy to carry and quick to transport. The locking mechanism of the folding joints of common folding ladders generally adopts a latch type. A large space gap is usually reserved between the latch type locking structure and the folding mechanism for easy locking, which makes the entire folding mechanism structure not compact; it is usually accompanied by abnormal noise when in use, affecting the user experience; the space gap makes the latch hole positioning inaccurate and prolongs the latch time, and the latch lock is usually in the form of an external hang-up, which makes it easy to lose and affects the safety of use. Summary of the invention

[0003] The purpose of the present invention is to provide a mechanical locking mechanism for locking perpendicular to the folding direction of a portable ladder in response to the problems existing in the prior art, so as to solve the problems of a loose structure, abnormal noise, long locking time and safety during folding.

[0004] The object of the present invention is achieved through the following technical solutions:

[0005] A mechanical locking mechanism for locking perpendicular to the folding direction of a portable ladder, the locking mechanism comprising a lower folding body 1 and an upper folding body 9, the lower folding body 1 and the upper folding body 9 are connected by a rotating shaft 16, a lock mounting groove 17 is provided on the side of the upper folding body 9, a lock embedding groove 18 is provided on the side of the lower folding body 1, a primary lock 5 is rotatably connected to the lower part of the lock mounting groove 17, a secondary lock limiter 6 is rotatably connected to the middle part of the primary lock 5, the secondary lock limiter 6 is rotatably connected to the secondary lock 2, one end of the secondary lock 2 is a tongue portion, the middle is a connecting portion, and the other end is a releasing portion, the connecting portion is rotatably connected to the secondary lock limiter 6, and the upper part of the lock embedding groove 18 is provided with a limiting lock 10 that cooperates with the tongue portion for locking.

[0006] As a further technical solution, a first magnet 3 is provided on the surface of the secondary lock buckle 2 close to the primary lock buckle 5, and a second magnet 4 is provided on the surface of the primary lock buckle 5 close to the secondary lock buckle 2, and the first magnet 3 and the second magnet 4 repel each other.

[0007] As a further technical solution, a third magnet 8 is provided in the middle of the lock mounting groove 17 , and the third magnet 8 and the second magnet 4 attract each other.

[0008] As a further technical solution, a T-slot 19 is provided on the left and right sides of the lock buckle installation groove 17, and a small rotating shaft 20 is provided on the left and right sides of the first-level lock buckle 5. The small rotating shaft 20 is embedded in the T-slot 19 and limited by the first-level lock buckle limiter 7.

[0009] As a further technical solution, the locking mechanism includes a release button, which includes a release button mounting base 11, a release button 12, and a release ejector pin 13. The release button mounting base 11 is connected to the lower folding body 1, the release button 12 is connected to the release button mounting base 11, and one end of the release ejector pin 13 is connected to the release button 12, and the other end extends from the middle of the lock buckle embedding groove 18.

[0010] As a further technical solution, a fourth magnet 14 is disposed on the release button 12, and a fifth magnet 15 is disposed on a side of the lower folding body 1 opposite to the release button 12, and the fourth magnet 14 and the fifth magnet 15 repel each other.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] 1. Two-stage locking is adopted, which is firmly locked;

[0013] 2. The unlocking action is simple and can be completed with one press;

[0014] 3. After locking and unlocking, the structure is inside the body, with no exposed structure;

[0015] 4. The locking mechanism has a compact structure and no abnormal noise when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a mechanical locking mechanism;

[0017] Figure 2 for Figure 1 A-direction sectional view;

[0018] Figure 3 for Figure 1 Exploded diagram of .

[0019] Explanation of the accompanying drawings: 1- downward folding body, 2-secondary lock, 3-first magnet, 4-second magnet, 5-first-level lock, 6-secondary lock limiter, 7-first-level lock limiter, 8-third magnet, 9-upward folding body, 10-limit lock, 11-release button mounting base, 12-release button, 13-release ejector pin, 14-fourth magnet, 15-fifth magnet, 16-rotating shaft, 17-lock mounting groove, 18-lock embedding groove, 19-T-slot, 20-small rotating shaft. DETAILED DESCRIPTION

[0020] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example

[0022] This embodiment provides a mechanical locking mechanism for locking the portable ladder perpendicular to the folding direction. Figures 1 to 3 As shown, the locking mechanism includes a lower folding body 1 and an upper folding body 9, and the lower folding body 1 and the upper folding body 9 are connected by a rotating shaft 16. As the lower folding body 1 and the upper folding body 9 rotate around the rotating shaft 16, the retracting and extending function of the portable ladder is realized. The structures of other parts of the lower folding body 1 and the upper folding body 9 not drawn in the figure are the structures that all portable ladders have, and will not be repeated in this embodiment.

[0023] A lock buckle installation groove 17 is provided on the side of the upper folding body 9, and a lock buckle embedding groove 18 is provided on the side of the lower folding body 1. A primary lock buckle 5 is rotatably connected to the lower part of the lock buckle installation groove 17, a secondary lock buckle limiter 6 is rotatably connected to the middle part of the primary lock buckle 5, and a secondary lock buckle limiter 6 is rotatably connected to the secondary lock buckle 2. One end of the secondary lock buckle 2 is a tongue portion, the middle is a connecting portion, and the other end is a release portion. The connecting portion is rotatably connected to the secondary lock buckle limiter 6. A limit lock 10 is provided on the upper part of the lock buckle embedding groove 18, which is locked in cooperation with the tongue portion. When the portable ladder is used, the upper and lower folding bodies are opened from the folded state around the rotating shaft 16, the primary lock buckle 5 rotates downward to the top of the lower folding body 1, and the protruding part of the primary lock buckle 5 is embedded in the lock buckle embedding groove 18 of the lower folding body 1 to achieve primary locking; then the secondary lock buckle 2 is rotated to cooperate with the limit lock 10 to achieve secondary locking, and the first and second locks cooperate to achieve the locking of the folding joint.

[0024] In order to facilitate the secondary locking, the secondary lock buckle 2 is provided with a first magnet 3 on the surface close to the primary lock buckle 5, and the primary lock buckle 5 is provided with a second magnet 4 on the surface close to the secondary lock buckle 2, and the first magnet 3 and the second magnet 4 repel each other. In this way, when the protruding part of the primary lock buckle 5 is embedded in the lock buckle embedding groove 18 of the lower folding body 1, after the primary locking is achieved, it is only necessary to lightly press the primary lock buckle 5, and the secondary lock buckle 2 can cooperate with the limit lock 10 around the rotation axis to achieve the secondary locking by relying on the mutual repulsion of the magnets.

[0025] A third magnet 8 is provided in the middle of the lock buckle installation groove 17, and the third magnet 8 attracts the second magnet 4. Such a structure enables the primary lock buckle 5 to be adsorbed in the lock buckle installation groove 17 when the portable ladder is folded, without an exposed structure.

[0026] A T-slot 19 is provided on the left and right sides of the lock buckle installation slot 17, and a small rotating shaft 20 is provided on the left and right sides of the primary lock buckle 5, which is embedded in the T-slot 19 and limited by the primary lock buckle limiting member 7. This structure is easy to disassemble and maintain, and can better realize the rotation of the primary lock buckle 5.

[0027] The locking mechanism includes a release button, which includes a release button mounting base 11, a release button 12, and a release ejector pin 13. The release button mounting base 11 is connected to the lower folding body 1, the release button 12 is connected to the release button mounting base 11, one end of the release ejector pin 13 is connected to the release button 12, and the other end extends from the middle of the lock buckle embedding groove 18. When the portable ladder needs to be collected, by lightly pressing the release button, the release ejector pin 13 pushes open the secondary lock buckle 2, and the secondary lock release shaft drives the primary lock buckle 5 to release the primary lock. When the primary and secondary locks are completely released, the upper and lower folding bodies are folded around the rotating shaft 16, and the primary and secondary lock buckles return to the initial state and are adsorbed on the third magnet 8 of the upper folding body.

[0028] A fourth magnet 14 is disposed on the release button 12, and a fifth magnet 15 is disposed on a side of the lower folding body 1 opposite to the release button 12, and the fourth magnet 14 and the fifth magnet 15 repel each other. Since the magnets repel each other, when the release button 12 is pressed and released, the release button 12 can be quickly and completely reset under the action of the magnetic force.

[0029] This locking mechanism is a purely mechanical structure, and innovatively uses the principle of like-sex magnets repelling each other to assist in locking and unlocking. All locking mechanisms are equipped with visual markings when unlocking and locking, and can provide sound and tactile changes when unlocking and locking to prevent the occurrence of false locks and the like.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanical locking mechanism for locking a portable ladder perpendicular to its folding direction, the locking mechanism comprising a lower folding body (1) and an upper folding body (9), the lower folding body (1) and the upper folding body (9) being connected via a rotating shaft (16), characterized in that: A lock buckle installation groove (17) is provided on the side of the upper folding body (9), and a lock buckle embedding groove (18) is provided on the side of the lower folding body (1). A primary lock buckle (5) is rotatably connected to the lower part of the lock buckle installation groove (17), a secondary lock buckle limiting member (6) is rotatably connected to the middle part of the primary lock buckle (5), and the secondary lock buckle limiting member (6) is rotatably connected to the secondary lock buckle (2). One end of the secondary lock buckle (2) is a tongue portion, the middle is a connecting portion, and the other end is a releasing portion. The connecting portion is rotatably connected to the secondary lock buckle limiting member (6), and a limiting lock (10) is provided on the upper part of the lock buckle embedding groove (18) for locking with the tongue portion. A first magnet (3) is provided on the surface of the secondary lock buckle (2) close to the primary lock buckle (5), and a second magnet (4) is provided on the surface of the primary lock buckle (5) close to the secondary lock buckle (2), and the first magnet (3) and the second magnet (4) repel each other; The locking mechanism comprises a release button, the release button comprising a release button mounting base (11), a release button (12), and a release ejector pin (13); the release button mounting base (11) is connected to the lower folding body (1); the release button (12) is connected to the release button mounting base (11); one end of the release ejector pin (13) is connected to the release button (12) and the other end extends from the middle of the lock buckle embedding groove (18).

2. A mechanical locking mechanism for locking perpendicular to the folding direction of a portable ladder according to claim 1, characterized in that: A third magnet (8) is provided in the middle of the lock buckle installation groove (17), and the third magnet (8) and the second magnet (4) attract each other.

3. A mechanical locking mechanism for locking perpendicular to the folding direction of a portable ladder according to claim 1, characterized in that: A T-groove (19) is provided on the left and right sides of the lock buckle installation groove (17), and a small rotating shaft (20) is provided on the left and right sides of the primary lock buckle (5). The small rotating shaft (20) is embedded in the T-groove (19) and is limited by the primary lock buckle limiting member (7).

4. A mechanical locking mechanism for locking perpendicular to the folding direction of a portable ladder according to claim 1, characterized in that: The release button (12) is provided with a fourth magnet (14), and a fifth magnet (15) is provided on a side of the lower folding body (1) opposite to the release button (12), and the fourth magnet (14) and the fifth magnet (15) repel each other.

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