Self-locking spring

Abstract

The utility model discloses a self-locking spring, and belongs to the technical field of springs. Aiming at the problem that a spring in the prior art is not easy to self-lock, the self-locking spring disclosed by the utility model greatly breaks through the limitation of a traditional spring through collaborative innovation of a built-in hinge type locking mechanism and traction unlocking: firstly, a movable rod realizes full-angle unfolding by virtue of gravity or a manual push rod, so that the problem of locking failure in a non-vertical state is thoroughly solved; the movable rod can be folded in a linkage mode only by slightly pressing the spring and then lifting the pull wire, and unlocking operation is obviously simplified; thirdly, the steel multi-hinge structure keeps strong locking force in a vibration environment, and the vibration resistance stability is comprehensively improved; a locking mechanism is completely arranged in a spring cavity, the space utilization rate is increased, the whole device is lighter and more compact, and revolutionary technical support is provided for medical and vehicle-mounted dynamic scenes and the like.

Description

Technical Field

[0001] This utility model belongs to the field of spring technology, specifically relating to a self-locking spring. Background Technology

[0002] In the application of mechanical compression springs, achieving self-locking at the compression position has always been a technical challenge. Traditional springs, due to their inherent structural limitations, cannot be fixed in deformation and must rely on external locking devices (such as ratchet, pin, or hydraulic brake) to maintain the compressed state. This not only significantly increases system complexity and manufacturing costs but also introduces reliability risks in dynamic environments. Especially for equipment that needs to adapt to multiple angles—such as emergency stretchers, off-road vehicle shock absorbers, or adjustable industrial workbenches—existing gravity-driven locking solutions have fatal flaws: when the equipment tilts, the gravity-deployed movable rod cannot droop and insert into the spring gap, resulting in complete failure of the locking function. For example, if a medical stretcher tilts due to vehicle bumps during transport, the traditional gravity-locking spring will fail, forcing medical personnel to manually secure it, delaying rescue and increasing safety hazards. While electromagnetic or pneumatic locking can achieve full-angle locking, it requires an additional power supply system and precision control module, significantly increasing costs and reducing environmental adaptability. This contradiction is particularly acute in high-end equipment such as aerospace and automotive medical equipment, which urgently require a spring-embedded locking structure that combines all-angle adaptive locking, pure mechanical passive drive, low cost and easy maintenance to fundamentally solve the locking reliability problem in non-vertical working conditions.

[0003] This invention attempts to solve or at least alleviate such problems by providing a self-locking spring. Utility Model Content

[0004] In view of one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides a self-locking spring, which has the advantage of being able to lock after compression.

[0005] To achieve the above objectives, this utility model provides a self-locking spring, comprising: a compression spring, a fixing plate provided at the top of the compression spring, and a locking mechanism provided at the bottom of the fixing plate, the locking mechanism being capable of hooking the gap of the compression spring.

[0006] As a further improvement of this utility model, the locking mechanism is disposed inside the compression spring.

[0007] As a further improvement of this utility model, the locking mechanism includes a fixed column, a bottom hinge is provided at the bottom of the fixed column, and two movable rods are symmetrically arranged on the bottom hinge. The movable rods can be opened under their own weight.

[0008] As a further improvement of this utility model, the cross-sectional dimension of the end of the movable rod is smaller than the gap of the compression spring.

[0009] As a further improvement of this utility model, the locking mechanism further includes a limiting plate disposed on the side of the fixed column, a slidable sliding column disposed inside the limiting plate, a sliding hinge disposed at the bottom of the sliding column, two connecting rods symmetrically disposed on the sliding hinge, and a side hinge disposed at the end of each of the two connecting rods, the two side hinges respectively connecting to the movable rods on the corresponding sides.

[0010] As a further improvement of this utility model, a tension structure is provided at the top of the sliding column.

[0011] As a further improvement of this utility model, the fixing plate has a through hole in the center, and the pulling structure is a traction line, which passes through the through hole.

[0012] As a further improvement of this utility model, the fixed column, limiting plate, sliding column, sliding hinge, connecting rod, side hinge, bottom hinge, and movable rod are all made of steel.

[0013] In summary, the beneficial effects of the above-described technical solutions conceived by this utility model compared with the prior art include:

[0014] This utility model discloses a self-locking spring that significantly overcomes the limitations of traditional springs through the synergistic innovation of a built-in hinge-type locking mechanism and a traction unlocking mechanism: First, the movable rod can be fully extended at all angles with the help of gravity or a manual push rod, completely solving the problem of locking failure in non-vertical states; Second, the movable rod can be retracted by simply pressing the spring lightly and then pulling the traction line, significantly simplifying the unlocking operation; Third, the steel multi-hinge structure maintains strong locking force in vibration environments, comprehensively improving vibration resistance and stability; Fourth, the locking mechanism is completely built into the spring cavity, achieving a leap in space utilization and making the overall device lighter and more compact, providing revolutionary technical support for dynamic scenarios such as medical and automotive applications. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the natural state of a self-locking spring according to the present invention;

[0016] Figure 2 This is a schematic diagram of the locking state of a self-locking spring according to the present invention;

[0017] Figure 3 This is a schematic diagram of the locking mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the fixing plate of this utility model.

[0019] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0020] Compression spring 1; fixing plate 2; locking mechanism 3; through hole 21; fixing post 31;

[0021] Limiting plate 32; sliding column 33; sliding hinge 34; connecting rod 35; side hinge 36;

[0022] Bottom hinge 37; movable rod 38; traction line 4. 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] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0025] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0026] A self-locking spring includes: a compression spring 1, a fixing plate 2 at the top of the compression spring 1, and a locking mechanism 3 at the bottom of the fixing plate 2. The locking mechanism 3 is capable of hooking into the gap of the compression spring 1. Placing the locking mechanism 3 at the bottom of the fixing plate 2 ensures the stability of the locking mechanism 3, preventing it from shifting during locking.

[0027] In a preferred embodiment of this invention, the locking mechanism 3 is disposed inside the compression spring 1. Disposing the locking mechanism 3 inside the compression spring 1 ensures the locking effect without occupying additional space.

[0028] In a preferred embodiment of this invention, the locking mechanism 3 includes a fixed post 31, with a bottom hinge 37 at its bottom. Two movable rods 38 are symmetrically arranged on the bottom hinge 37, and each movable rod 38 can open under its own weight. When the compression spring 1 is pressed down, the movable rods 38 can move downwards. The total length of the two movable rods 38 is greater than the diameter of the compression spring 1, allowing the movable rods 38 to insert into the gap of the compression spring 1.

[0029] In a preferred embodiment of this invention, the cross-sectional dimension of the end of the movable rod 38 is smaller than the gap of the compression spring 1. Specifying that the cross-sectional dimension of the end of the movable rod 38 is smaller than the gap of the compression spring 1 makes it easier to insert the movable rod 38 into the gap.

[0030] In a preferred embodiment of this utility model, the locking mechanism 3 further includes a limiting plate 32 disposed on the side of the fixed column 31. A slidable sliding column 33 is disposed within the limiting plate 32. A sliding hinge 34 is disposed at the bottom of the sliding column 33. Two connecting rods 35 are symmetrically disposed on the sliding hinge 34. Each of the two connecting rods 35 has a side hinge 36 at its end. The two side hinges 36 are respectively connected to the movable rods 38 on their corresponding sides. The sliding column 33 controls the movement of the movable rods 38, allowing the compression spring 1 to lock at all angles, and also allowing it to unlock and return to its original position after locking.

[0031] As a preferred embodiment of this utility model, a tension structure is provided at the top of the sliding column 33. The tension structure makes it easier to pull the sliding column 33 upwards.

[0032] In a preferred embodiment of this invention, the fixing plate 2 has a through hole 21 at its center, and the pulling structure is a traction line 4, which passes through the through hole 21. Using a thin rope as the pulling mechanism avoids other rigid material structures occupying space at the top of the compression spring 1 and affecting its performance.

[0033] In a preferred embodiment of this invention, the fixed column 31, limiting plate 32, sliding column 33, sliding hinge 34, connecting rod 35, side hinge 36, bottom hinge 37, and movable rod 38 are all made of steel. The steel material ensures that the locking mechanism 3 is more robust and durable.

[0034] Working principle: The locking mechanism 3 locks the compression spring 1 when it is compressed to a suitable position. In use, first ensure the end with the fixed plate 2 is facing upwards. When compressing the compression spring 1, the movable rod 38 moves downwards. After compressing to the suitable position, the compression spring 1 is released, and the movable rod 38, under its own weight, can insert into the gap of the compression spring 1 to lock it. When not in a vertical position, pushing the sliding pin 33 opens the movable rod 38, allowing it to insert into the gap of the compression spring 1 for locking.

[0035] During recovery, first slightly compress the compression spring 1 to separate the movable rod 38 from the compression spring 1, then pull the sliding column 33 upward to retract the movable rod 38. At this point, the lock can be released and the spring can be reset.

[0036] In summary, this utility model's self-locking spring, through the synergistic innovation of a built-in hinge-type locking mechanism and traction unlocking, significantly overcomes the limitations of traditional springs: First, the movable rod can be fully extended at all angles with the help of gravity or a manual push rod, completely solving the problem of locking failure in non-vertical states; Second, the movable rod can be retracted by simply pressing the spring lightly and then pulling the traction line, significantly simplifying the unlocking operation; Third, the steel multi-hinge structure maintains strong locking force in vibration environments, comprehensively improving vibration resistance and stability; Fourth, the locking mechanism is completely built into the spring cavity, achieving a leap in space utilization and making the overall device lighter and more compact, providing revolutionary technical support for dynamic scenarios such as medical and automotive applications.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-locking spring, characterized in that, include: A compression spring (1) is provided with a fixing plate (2) at the top and a locking mechanism (3) at the bottom of the fixing plate (2). The locking mechanism (3) can hook the gap of the compression spring (1).

2. The self-locking spring according to claim 1, characterized in that The locking mechanism (3) is located inside the compression spring (1).

3. The self-locking spring of claim 1, wherein The locking mechanism (3) includes a fixed column (31), and a bottom hinge (37) is provided at the bottom of the fixed column (31). Two movable rods (38) are symmetrically arranged on the bottom hinge (37), and the movable rods (38) can be opened under their own gravity.

4. The self-locking spring according to claim 3, characterized in that The cross-sectional dimension of the end of the movable rod (38) is smaller than the gap of the compression spring (1).

5. The self-locking spring of claim 3, wherein The locking mechanism (3) further includes a limiting plate (32) disposed on the side of the fixed column (31). A sliding column (33) is disposed inside the limiting plate (32). A sliding hinge (34) is disposed at the bottom of the sliding column (33). Two connecting rods (35) are symmetrically disposed on the sliding hinge (34). A side hinge (36) is disposed at the end of each of the two connecting rods (35). The two side hinges (36) are respectively connected to the movable rod (38) on the corresponding side.

6. The self-locking spring according to claim 5, characterized in that The top of the sliding column (33) is provided with a tension structure.

7. The self-locking spring according to claim 6, characterized in that The fixing plate (2) has a through hole (21) in the center, and the traction structure is a traction line (4), which passes through the through hole (21).

8. The self-locking spring according to claim 7, characterized in that The fixed column (31), limiting plate (32), sliding column (33), sliding hinge (34), connecting rod (35), side hinge (36), bottom hinge (37), and movable rod (38) are all made of steel.

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