A multi-angle folding locking mechanism

Abstract

This invention discloses a multi-angle folding locking mechanism, comprising a housing, an external pin structure, and a safety pin structure. The housing includes a box, within which the external pin structure and the safety pin structure are housed. The external pin structure includes an auxiliary safety disc, a locking mechanism shaft, and an outer rotating disc. The safety pin structure includes a grooved disc. The auxiliary safety disc, the grooved disc, and the outer rotating disc are slidably mounted on the locking mechanism shaft from left to right. The left end face of the auxiliary safety disc engages with the inner wall of the box via a spring. An outer pin, which engages with a through hole on the outer rotating disc, is fixedly mounted on the right end face of the auxiliary safety disc. The left end face of the grooved disc engages with the right end face of the auxiliary safety disc. This multi-angle folding locking mechanism enables rapid folding and locking with precise and adjustable folding angles. It allows for simultaneous folding and locking of two different mechanisms, is easy to operate, and effectively solves the problems of inaccurate positioning and large space occupation in existing locking mechanisms.

Description

Technical Field

[0001] This invention relates to the field of locking mechanisms, and more particularly to a multi-angle folding locking mechanism. Background Technology

[0002] Folding chairs are widely used due to their foldable design and space-saving design. Most existing folding chairs use linkages and locking pins to achieve folding locking, but due to the limitations of these mechanisms, they cannot guarantee precise and adjustable folding angles.

[0003] Circular positioning locking mechanisms can be implemented in various ways, but current locking mechanisms generally suffer from problems such as inaccurate positioning and excessively long return groove leads. This directly limits their application to mechanisms with non-precise fixed angle requirements and results in a large footprint. Therefore, developing a multi-angle folding locking mechanism has become a pressing issue for those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-angle folding locking mechanism that solves the problems of inaccurate positioning and large space occupation of locking mechanisms.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] This invention discloses a multi-angle folding locking mechanism, comprising a housing, an external pin structure, and a safety pin structure. The housing includes a box, within which the external pin structure and the safety pin structure are nested. The external pin structure includes an auxiliary safety disc, a locking mechanism shaft, and an outer rotating disc. The safety pin structure includes a grooved disc. The auxiliary safety disc, the grooved disc, and the outer rotating disc are slidably mounted on the locking mechanism shaft from left to right. The left end face of the auxiliary safety disc engages with the inner wall of the box via a spring. An outer pin is fixedly mounted on the right end face of the auxiliary safety disc, engaging with a through hole on the outer rotating disc. The left end face of the grooved disc engages with the right end face of the auxiliary safety disc.

[0007] Furthermore, the inclined groove on the inclined groove disc is connected to the bottom end of the pull rod through the connecting rod split end and the connecting rod split end cover, and the top end of the pull rod is provided with a pull rod head.

[0008] Furthermore, the connecting rod end slides into the groove on the inclined disk.

[0009] Furthermore, the top of the housing is provided with a limiting plate that cooperates with the pull rod, and the limiting plate has a slot for the pull rod to slide up and down.

[0010] Furthermore, the inner ring of the outer rotating disk is provided with an inner rotating disk, a safety pin is provided on the right end face of the inclined groove disk, and a blind hole is provided on the left end face of the inner rotating disk to engage with the safety pin.

[0011] Furthermore, the inner rotating disk and the outer rotating disk are an integral structure.

[0012] Furthermore, the inner edge of the auxiliary safety disc and the outer edge of the inclined groove disc are both provided with limiting grooves, and the edge of the reserved hole in the housing is welded with a slide rail that cooperates with the limiting groove.

[0013] Furthermore, the number of outer pins is 6, and several through holes that cooperate with the outer pins are evenly opened on the outer rotating disk.

[0014] Furthermore, the number of safety pins is three, and the inner rotating disk has several blind holes that cooperate with the safety pins.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0016] In this invention, the outer pin of the multi-angle folding locking mechanism is pulled out from the through hole of the outer rotating disk when the lever is pulled, thereby allowing the outer rotating disk to rotate arbitrarily relative to the outer pin about the locking mechanism axis until a set angle is reached. The outer pin then re-inserts into a new through hole to achieve angular positioning of the rotating disk. The outer and inner rotating disks of this invention can achieve folding and locking functions for two different mechanisms. When the outer and inner rotating disks are fixed, the inner rotating disk, located on the inside, acts as a safety structure to prevent accidental release of the locking mechanism by the user pulling the connecting rod. In summary, this invention's multi-angle folding locking mechanism achieves rapid folding and locking with precise folding angles, allows for simultaneous folding and locking of two different mechanisms, is easy to operate, and solves the problem of excessive structural complexity and bulk while meeting torque resistance requirements. Furthermore, it eliminates the risk of accidental release of the locking mechanism due to accidental lever activation. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] Figure 1 This is a front view of the multi-angle folding locking mechanism of the present invention;

[0019] Figure 2 This is a top view of the multi-angle folding locking mechanism of the present invention;

[0020] Figure 3 for Figure 1 AA section diagram;

[0021] Figure 4 This is an isometric view of the multi-angle folding locking mechanism of the present invention;

[0022] Figure 5 This is an exploded view (front view) of the multi-angle folding locking mechanism of the present invention.

[0023] Figure 6 This is an exploded view (top view) of the multi-angle folding locking mechanism of the present invention.

[0024] Figure 7 This is an exploded view (side view) of the multi-angle folding locking mechanism of the present invention.

[0025] Figure 8 This is an exploded view (axonometric) of the multi-angle folding locking mechanism of the present invention. Figure 1 );

[0026] Figure 9 This is an exploded view (axonometric) of the multi-angle folding locking mechanism of the present invention. Figure 2 );

[0027] Figure 10 Side view of the external pin structure and the safety pin structure in tandem (initial state);

[0028] Figure 11 Axonometric diagram (initial state) showing the fit between the external pin structure and the safety pin structure;

[0029] Figure 12 Side view showing the combination of external pin structure and safety pin structure (safety pin unlocked).

[0030] Figure 13 Axis diagram showing the fit between the external pin structure and the safety pin structure (safety pin unlocking);

[0031] Figure 14 Side view showing the external pin structure and the safety pin structure in tandem (external pin unlocked);

[0032] Figure 15 The isometric diagram is used to align the external pin structure and the safety pin structure (external pin unlocking).

[0033] Explanation of reference numerals in the attached drawings: 1. Outer shell; 1-1. Housing; 2. External pin structure; 2-1. Locking mechanism shaft; 2-2. Inner rotating disk; 2-3. Outer rotating disk; 2-4. Auxiliary safety disk; 2-5. Spring; 2-6. Outer pin; 3. Safety pin structure; 3-1. Slanted groove disk; 3-2. Connecting rod split cover; 3-3. Connecting rod split; 3-4. Pull rod; 3-5. Pull rod head; 3-6. Safety pin. Detailed Implementation

[0034] like Figures 1 to 15As shown, a multi-angle folding locking mechanism includes a housing 1, an external pin structure 2, and a safety pin structure 3.

[0035] The outer casing 1 includes a housing 1-1, and an external pin structure 2 and a safety pin structure 3 are nested inside the housing 1-1.

[0036] The external pin structure 2 includes an auxiliary safety disc 2-4, a locking mechanism shaft 2-1, and an outer ring rotating disc 2-3. The safety pin structure 3 includes a slanted groove disc 3-1.

[0037] The directional words such as front, back, left, and right in this article are all relative to... Figures 10 to 15 Regarding the position of the locking mechanism.

[0038] The auxiliary safety disc 2-4, the inclined groove disc 3-1, and the outer ring rotating disc 2-3 are slidably mounted on the locking mechanism shaft 2-1 from left to right. The left end face of the auxiliary safety disc 2-4 is engaged with the inner wall of the housing 1-1 by a spring 2-5. An outer pin 2-6 is fixedly mounted on the right end face of the auxiliary safety disc 2-4, which is engaged with the through hole on the outer ring rotating disc 2-3. The left end face of the inclined groove disc 3-1 is engaged with the right end face of the auxiliary safety disc 2-4.

[0039] The inner ring of the outer ring rotating disk 2-3 is provided with an inner ring rotating disk 2-2. A safety pin 3-6 is provided on the right end face of the inclined groove disk 3-1. A blind hole is provided on the left end face of the inner ring rotating disk 2-2 to engage with the safety pin 3-6.

[0040] The inclined groove on the inclined groove disc 3-1 is connected to the bottom end of the pull rod 3-4 through the connecting rod split head 3-3 and the connecting rod split head cover 3-2. The top end of the pull rod 3-4 is provided with a pull rod head 3-5.

[0041] The connecting rod split end 3-3 slides into the inclined groove on the inclined groove disk 3-1.

[0042] The top of the housing 1-1 is provided with a limiting plate that cooperates with the pull rod 3-4. The limiting plate has a slot for the pull rod 3-4 to slide up and down.

[0043] The inner edge of the auxiliary safety disc 2-4 and the outer edge of the inclined groove disc 3-1 are both provided with limiting grooves, and the edge of the reserved hole of the housing 1-1 is welded with a slide rail that cooperates with the limiting groove.

[0044] The number of outer pins 2-6 is 6, and the outer ring rotating disk 2-3 has several through holes evenly distributed on it to mate with the outer pins 2-6. The number of through holes on the outer ring rotating disk 2-3 is determined according to the required rotational positioning accuracy of the outer ring rotating disk 2-3.

[0045] There are three safety pins 3-6, and each inner rotating disk 2-2 has several blind holes that mate with the safety pins 3-6. The number of blind holes on the inner rotating disk 2-2 is determined according to the required rotational positioning accuracy of the inner rotating disk 2-2.

[0046] The operation process of this invention is as follows:

[0047] When the inner ring rotating disk 2-2 and the outer ring rotating disk 2-3 are an integral structure, the inner ring rotating disk 2-2 serves as a safety protection structure for the outer ring rotating disk 2-3.

[0048] like Figures 10 to 15 As shown, firstly, pull rod 3-4 is pulled upwards, which drives the inclined groove disk 3-1 to move to the left; then, the safety pin 3-6 on the right end face of the inclined groove disk 3-1 disengages from the blind hole on the inner ring rotating disk 2-2; after that, pull rod 3-4 is pulled upwards again, which continues to drive the inclined groove disk 3-1 to move to the left, and the left end face of the inclined groove disk 3-1 pushes the auxiliary safety disk 2-4 to move to the left, and the outer pin 2-6 on the right end face of the auxiliary safety disk 2-4 disengages from the through hole on the outer ring rotating disk 2-3; finally, after rotating the outer ring rotating disk 2-3 to the required angle, pull rod 3-4 is pushed downwards to limit its position, and the safety pin 3-6 and the outer pin 2-6 are reset under the action of the inclined groove disk 3-1 and the spring 2-5.

[0049] When the inner ring rotating disk 2-2 and the outer ring rotating disk 2-3 are separate structures, the inner ring rotating disk 2-2 and the outer ring rotating disk 2-3 can be connected to different structures respectively.

[0050] like Figures 10 to 15 As shown, firstly, pull rod 3-4 is pulled upwards, driving the inclined groove disk 3-1 to move to the left; then, the safety pin 3-6 on the right end face of the inclined groove disk 3-1 disengages from the blind hole on the inner ring rotating disk 2-2, at which point the inner ring rotating disk 2-2 is unlocked, allowing rotation at any angle; next, pull rod 3-4 is pulled upwards again, driving the inclined groove disk 3-1 to move to the left, and the left end face of the inclined groove disk 3-1 pushes the auxiliary safety disk 2-4 to move to the left, disengaging the outer pin 2-6 on the right end face of the auxiliary safety disk 2-4 from the through hole on the outer ring rotating disk 2-3, at which point the outer ring rotating disk 2-3 is unlocked, allowing rotation at any angle; finally, after rotating the outer ring rotating disk 2-3 and the inner ring rotating disk 2-2 to the desired angle, pull rod 3-4 is pushed downwards, and the safety pin 3-6 and the outer pin 2-6 are reset under the action of the inclined groove disk 3-1 and the spring 2-5.

[0051] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A multi-angle folding locking mechanism, characterized in that: The device includes a housing (1), an external pin structure (2), and a safety pin structure (3). The housing (1) includes a box (1-1), and the external pin structure (2) and the safety pin structure (3) are nested inside the box (1-1). The external pin structure (2) includes an auxiliary safety disc (2-4), a locking mechanism shaft (2-1), and an outer ring rotating disc (2-3). The safety pin structure (3) includes a grooved disc (3-1). The auxiliary safety disc (2-4), the grooved disc (3-1), and the outer ring rotating disc (2-3) are slidably arranged on the locking mechanism shaft (2-1) from left to right. The left end face of the auxiliary safety disc (2-4) is engaged with the inner wall of the box (1-1) by a spring (2-5). The right end face of the auxiliary safety disc (2-4) is fixedly provided with a mechanism that interacts with the outer ring rotating disc. The outer pin (2-6) is inserted into the through hole on the moving plate (2-3); the left end face of the inclined groove disc (3-1) is engaged with the right end face of the auxiliary safety disc (2-4); the connecting rod branch (3-3) is slidably engaged with the inclined groove on the inclined groove disc (3-1); the top of the housing (1-1) is provided with a limiting plate that engages with the pull rod (3-4); the limiting plate has a slot for the pull rod (3-4) to slide up and down only; the inner ring of the outer ring rotating disc (2-3) is provided with an inner ring rotating disc (2-2); the right end face of the inclined groove disc (3-1) is provided with a safety pin (3-6); the left end face of the inner ring rotating disc (2-2) is provided with a blind hole that engages with the safety pin (3-6); the inner ring rotating disc (2-2) and the outer ring rotating disc (2-3) are an integral structure.

2. The multi-angle folding locking mechanism according to claim 1, characterized in that: The inclined groove on the inclined groove disc (3-1) is connected to the bottom end of the pull rod (3-4) through the connecting rod split head (3-3) and the connecting rod split head cover (3-2), and the top end of the pull rod (3-4) is provided with a pull rod head (3-5).

3. The multi-angle folding locking mechanism according to claim 1, characterized in that: Limiting grooves are provided on the inner edge of the auxiliary safety disc (2-4) and the outer edge of the inclined groove disc (3-1). A slide rail that matches the limiting groove is welded to the edge of the reserved hole in the housing (1-1).

4. The multi-angle folding locking mechanism according to claim 1, characterized in that: The number of the outer pins (2-6) is 6, and the outer ring rotating disk (2-3) has several through holes evenly distributed on it to cooperate with the outer pins (2-6).

5. The multi-angle folding locking mechanism according to claim 1, characterized in that: The number of safety pins (3-6) is 3, and the inner ring rotating disk (2-2) is evenly provided with several blind holes that cooperate with the safety pins (3-6).

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