Locking device

Abstract

The utility model relates to the technical field of locking parts, in particular to a locking device which comprises a base and a handle, the base is provided with a connecting seat hinged to the middle of the handle, a torsional spring abutting against the handle and the base is arranged at the hinged position of the connecting seat and the handle, and a lock pin is hinged to the front portion of the handle. And the base is provided with a guide hole for the lock pin to pass through below the front part of the handle. By means of the locking device, the using state of a product can be locked, the locking state of the product can be unlocked, the lock pin can be effectively prevented from being accidentally disengaged from the hole, it is ensured that the lock pin can automatically keep the locking state under certain conditions, and therefore the risk of unlocking caused by misoperation is reduced, and the safety of the product is improved. And the use safety is obviously improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to locking component technical field, especially a locking device. BACKGROUND

[0002] When designing foldable and telescopic products such as ladders, stools, etc., the locking device is a key component to ensure stability and safety in use. The purpose of the locking device is to prevent the product from accidentally folding or telescoping during use, thereby avoiding potential dangers. Traditionally, this is achieved by using a latch, i.e., inserting the latch into a pre-designed hole to fix the angle or length of the product.

[0003] Although the latch and hole combination is effective in many cases, they also have some shortcomings. The most important problem is that if the latch is not firmly connected to the product structure, it may be accidentally touched or moved to pull out the latch, thereby releasing the locking state. This is particularly common when the user does not notice or accidentally touches the latch during operation, which may cause the product to suddenly fold or telescope, resulting in lower safety performance of the product. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a locking device that can reduce the risk of locking release due to misoperation.

[0005] To solve the above technical problems, the utility model provides a locking device, which comprises a base and a handle. The base is provided with a connecting seat that is hingedly connected to the middle part of the handle. The connecting seat is provided with torsional springs that abut against the handle and the base, respectively, at the hinge connection. The front part of the handle is hingedly connected to a latch. The base is provided with a guide hole below the front part of the handle for the latch to pass through.

[0006] As an improvement of the above-mentioned scheme, the handle is provided with a receiving cavity. The connecting seat extends into the receiving cavity and is hingedly connected to the middle part of the handle. The upper part of the latch extends into the receiving cavity and is hingedly connected to the front part of the handle.

[0007] As an improvement of the above-mentioned scheme, the connecting seat is provided with a first connecting shaft that is hingedly connected to the middle part of the handle. The torsional spring is sleeved on the first connecting shaft and extends into the receiving cavity.

[0008] As an improvement of the above-mentioned scheme, the front part of the handle is provided with a second connecting shaft. The upper part of the latch is a circular truncated cone that is hingedly connected to the second rotating shaft. The lower part of the latch is a circular cylinder. The diameter of the guide hole is greater than the outer diameter of the lower part of the latch and smaller than the outer diameter of the upper part of the latch.

[0009] As an improvement of the above-mentioned scheme, the lower side of the tail end of the handle is inclined upward from front to back.

[0010] As an improvement of the above-mentioned scheme, the tail end of the handle is provided with a pressing piece that is tilted upward from front to back.

[0011] As the improvement of the above-mentioned scheme, the rear side of the pressing piece is a rearward convex arc surface.

[0012] As the improvement of the above-mentioned scheme, the lower side of the tail part of the handle and the lower side of the middle part of the handle are connected with the pressing piece and are provided with arc transitions.

[0013] The utility model discloses, have the following beneficial effects:

[0014] The locking device of the utility model discloses through the mutual cooperation of base, handle, connecting seat, torsional spring, lock pin and guide hole, can realize the use state of locking product and the release product's locking state, and can effectively prevent the lock pin from accidentally from the hole, ensure that the lock pin can keep the locking state under certain conditions, thereby reduce the risk of locking release due to misoperation, significantly improve the use safety. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the three-dimensional schematic view of the locking device in the utility model embodiment;

[0016] Fig. 2 It is the three-dimensional schematic view of the locking device in the utility model embodiment another angle;

[0017] Fig. 3 It is the working principle diagram of the lock pin and guide hole in the utility model embodiment.

[0018] In the drawing: 1, base;2, handle;3, connecting seat;4, torsional spring;5, lock pin;6, guide hole;7, accommodating cavity;8, first connecting shaft;9, second connecting shaft;10, circular table;11, cylinder;12, pressing piece;13, arc transition. DETAILED DESCRIPTION

[0019] The utility model will be further described in conjunction with the drawings and specific embodiment, so that the technical idea of the utility model claimed is more clearly understood. Only this declaration, the up, down, left, right, front, back, inside, outside and other orientation words appearing or about to appear in the text of the utility model, only with the drawings of the utility model as the base, it is not the specific limitation of the utility model.

[0020] As Figs. 1 to 3 The utility model embodiment of the utility model discloses a locking device, including base 1 and handle 2, the base 1 is equipped with the connecting seat 3 of the middle part hinged of handle 2, the connecting seat 3 is equipped with torsional spring 4 respectively with handle 2 and base 1 and is opposite at hinge joint of handle 2, the handle 2 front part is hinged with lock pin 5, and the base 1 is below handle 2 front part and is equipped with guide hole 6 for the lock pin 5 through.

[0021] It should be noted that the locking device of the utility model plays a crucial role in the design of the base 1, which is responsible for securely installing the entire locking system on the corresponding part of the foldable or telescopic product. The following is a detailed description of the mechanism.

[0022] Application on folding stools: For products such as folding stools, the structure is usually composed of stool legs and a stool surface. The stool legs can be folded relative to the stool surface. In this design, the base 1 is installed on the stool legs to align with the rotation axis of the stool surface. The stool surface is equipped with a series of holes arranged around the rotation axis of the stool legs and the stool surface, matching the size of the lock pin 5. This design allows the stool legs to swing relative to the stool surface when needed, adjusting the use state of the folding stool, whether it is unfolded or folded.

[0023] Application on telescopic legs: In the design of telescopic legs, the product usually includes an outer sleeve and an inner sleeve, where the inner sleeve can slide inside the outer sleeve to adjust the combined length of the two. To achieve this function, the base 1 is installed on the inner sleeve, while the outer sleeve is designed with multiple equidistantly distributed holes matching the lock pin 5. In this way, users can easily adjust the relative position of the inner sleeve and the outer sleeve, thereby changing the overall length of the product to meet different usage needs.

[0024] In summary, the locking device of the utility model can ensure the stability of the product in the required state, whether it is in the process of folding, unfolding or telescoping. At the same time, the installation method of the base 1 also ensures the close fit of the locking system with the product structure, improving the convenience and safety of use.

[0025] When the product reaches the required use state and needs to be fixed, the lock pin 5 is inserted into the corresponding hole on the product through the guide hole 6. At this time, the elastic force of the torsional spring 4 acts on the handle 2, making the front part of the handle 2 press down, which effectively prevents the lock pin 5 from accidentally coming out of the hole, ensuring that the lock pin 5 can automatically maintain the locked state under certain conditions, thereby reducing the risk of unlocking due to misoperation and significantly improving the safety of use. When you need to change the state of the product, such as switching from the locked state to the folded or telescopic state, you can press the handle 2 to overcome the elastic force of the torsional spring 4. This operation makes the front part of the handle 2 lift up, thereby driving the lock pin 5 to exit from the hole of the product. Once the lock pin 5 leaves the hole, the product can be smoothly folded or telescoped, providing users with a flexible operation experience.

[0026] The utility model discloses a locking device through the mutual cooperation of base 1, handle 2, connecting seat 3, torsional spring 4, locking pin 5 and guide hole 6, can realize the use state of locking product and the release product's locking state, and can effectively prevent locking pin 5 from accidentally from the hole, ensure that locking pin 5 can keep locking state under certain conditions, thereby reduce the risk of locking release due to misoperation, significantly improve the use security.

[0027] Need to explain, the handle 2 preferably is equipped with containing cavity 7, the connecting seat 3 is inserted into containing cavity 7 and is articulated with handle 2 middle part, the upper portion of locking pin 5 is inserted into containing cavity 7 and is articulated with handle 2 front part. Actually, the handle 2 can adopt sheet metal material and is formed by bending processing technology, and the upper side, the head side and the left and right sides of handle 2 form a firm containing cavity 7. The containing cavity 7 not only provides a safe protection space for the core component of locking device, but also ensures the articulated point of handle 2 middle part and connecting seat 3, torsional spring 4 and the upper portion of locking pin 5 are not affected by external impact and abrasion. Such design not only improves the durability of locking device, but also guarantees its stability and security in long-term use, so that the operation of product in folding or telescoping process is more reliable and smooth.

[0028] Specifically, the connecting seat 3 is preferably provided with a first connecting shaft 8 articulated with the middle part of the handle 2, and the torsional spring 4 is sleeved on the first connecting shaft 8 and extends into the containing cavity 7. Actually, the connecting seat can be provided with a connecting hole rotationally connected with the first connecting shaft 8, and the first connecting shaft 8 is connected with the left and right sides in the containing cavity 7 respectively, so that the middle part of the handle 2 is articulated with the connecting seat, and the containing cavity 7 can protect the torsional spring 4.

[0029] Specifically, the front part of the handle 2 is preferably provided with a second connecting shaft 9, the upper part of the locking pin 5 is a circular truncated cone 10 articulated with the second rotating shaft, the lower part of the locking pin 5 is a circular column 11, and the diameter of the guide hole 6 is greater than the outer diameter of the lower part of the locking pin 5 and less than the outer diameter of the upper part of the locking pin 5. When the locking device of the utility model is in the locking state, the elastic force of the torsional spring 4 will push the front part of the handle 2 to press down tightly. This action makes the lower part of the locking pin 5 smoothly pass through the guide hole 6 and further extend into the hole of the external product, realizing the locking function. The upper part of the locking pin 5 is in the shape of a circular truncated cone 10, and the outer diameter is designed to be greater than the diameter of the guide hole 6, which effectively prevents the locking pin 5 from being inserted into the product hole too much, avoiding potential damage or jamming. At the same time, the lower part of the locking pin 5 is in the shape of a circular column 11, and the diameter is less than the diameter of the guide hole 6, which provides the necessary space for the swinging of the locking pin 5 in the guide hole 6, ensuring that the locking pin 5 can be flexibly locked and unlocked.

[0030] It is worth mentioning that the lower side of the tail of the handle 2 is preferably inclined upward from front to back. In order to release the locking state of the locking device, the user needs to press the upper side of the handle 2 with an upward force. This action overcomes the elastic force of the torsion spring 4, causing the front of the handle 2 to be raised upward, and the tail of the handle 2 to swing downward. In this process, the lower side of the tail of the handle 2 is designed to be gradually inclined upward from front to back, which provides additional space for the swinging action of the tail of the handle 2, ensuring that the handle 2 can smoothly complete the unlocking action.

[0031] Further, the tail end of the handle 2 is preferably provided with a pressing piece 12 that is inclined upward from front to back. In fact, the pressing piece 12 is further away from the hinge between the middle of the handle 2 and the connecting seat 3, and the front of the pressing piece 12 can be raised with less force, and the inclination design of the pressing piece 12 from front to back upward is more matched with the fingers of the operator, and is more in line with human body ergonomics. Further, the rear side of the pressing piece 12 is preferably a convex arc surface, which ensures the contact area with the fingers of the operator.

[0032] In addition, the lower side of the tail of the handle 2 and the lower side of the middle of the handle 2 are connected, and the connecting place with the pressing piece 12 is preferably provided with a circular arc transition 13, which improves the connection strength of the tail of the handle 2 and the middle of the handle 2 and the pressing piece 12.

[0033] The above is only a specific embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A locking device, characterized by: The handle is provided with a containing cavity, the connecting seat extends into the containing cavity and is hinged with the middle part of the handle, and the upper part of the lock pin extends into the containing cavity and is hinged with the front part of the handle.

2. A locking device as claimed in claim 1, characterised in that: The connecting seat is provided with a first connecting shaft hinged with the middle part of the handle, and the torsion spring is sleeved on the first connecting shaft and extends into the containing cavity.

3. A locking device as claimed in claim 2, characterised in that: The front part of the handle is provided with a second connecting shaft, the upper part of the lock pin is a circular truncated cone hinged with the second connecting shaft, the lower part of the lock pin is a circular column, the diameter of the guide hole is greater than the outer diameter of the lower part of the lock pin and smaller than the outer diameter of the upper part of the lock pin.

4. A locking device as claimed in claim 2, characterised in that: The lower side of the tail end of the handle is provided with a pressing piece which is tilted upward from front to back.

5. A locking device as claimed in claim 1, characterized in that: The tail end of the handle is provided with a pressing piece which is tilted upward from front to back.

6. A locking device as claimed in claim 5, characterised in that: The rear side of the pressing piece is a convex circular arc surface.

7. A locking device as claimed in claim 6, characterised in that: The lower side of the tail end of the handle is provided with a circular arc transition at the connection with the middle part of the handle and the connection with the pressing piece.

8. A locking device as claimed in claim 6, characterised in that: ​

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