Self-locking spring

Abstract

The invention relates to the technical field of springs, in particular to a self-locking spring which comprises a spring body, a pressing piece and a base, the pressing piece comprises an upper guide part and an upper positioning part for positioning the starting end of the spring body, the base comprises a lower installation part and a lower positioning part for positioning the ending end of the spring body, the lower installation part and the upper guide part slide relatively, and the spring body is arranged externally or internally. A locking point is arranged on the upper guide portion, a special-shaped hook groove matched with the locking point is formed in the peripheral face of the lower installation portion, when the pressing piece is pressed downwards, the locking point moves along the special-shaped hook groove to be clamped in the special-shaped hook groove to achieve self-locking, and when the pressing piece is pressed downwards during self-locking, the locking point is separated from the special-shaped hook groove to achieve unlocking. The self-locking spring has the beneficial effects that the spring can be directly applied to a scene needing self-locking, self-locking can be achieved without depending on an external self-locking structure, and practicability is high.

Description

Technical Field

[0001] This invention relates to the field of spring technology, specifically to self-locking springs. Background Technology

[0002] As one of the most basic elastic elements, springs are widely used in fields such as buffering and shock absorption, energy storage and reset, and force transmission. The core characteristic of springs is that they can "rebound to the initial state after being deformed by external force". This characteristic performs well in scenarios that require periodic reciprocating motion. However, in scenarios where the state of the device needs to be changed by a single press or deformation action and maintained in that state for a long time until it is actively unlocked, a self-locking spring is required.

[0003] Existing self-locking springs are self-locking spring structures, that is, springs work in conjunction with self-locking structures. Now, we are developing an independent self-locking spring for the above-mentioned scenarios. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a self-locking spring that can be used independently, in order to address the shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a self-locking spring, characterized in that it includes a spring, a pressing member, and a base. The pressing member includes an upper guide portion and an upper positioning portion for positioning the starting end of the spring. The base includes a lower mounting portion and a lower positioning portion for positioning the ending end of the spring. The lower mounting portion slides relative to the upper guide portion. The spring is externally or internally mounted. The upper guide portion is provided with a locking point. The outer circumferential surface of the lower mounting portion is provided with a shaped hook groove adapted to the locking point. When the pressing member is pressed down, the locking point moves along the shaped hook groove until it is locked in the shaped hook groove to achieve self-locking. When the pressing member is pressed down during self-locking, the locking point disengages from the shaped hook groove to achieve unlocking.

[0006] The present invention, which has the above-mentioned features, forms an independent self-locking spring with the spring, the pressing element and the base. The self-locking and unlocking functions are achieved by pressing and unlocking through the locking point and the irregular hook groove, and by the elastic force and torsion of the spring. The self-locking spring can be directly applied to scenarios that require self-locking, and can achieve self-locking without relying on an external self-locking structure, which is highly practical.

[0007] A further feature of the present invention is that the irregular hook groove includes a directional groove arranged vertically. One end of the directional groove is located on the end face of the lower mounting part and has an opening that communicates with the outside. The other end is connected to a guide groove. The guide groove is inclined towards the side away from the directional groove. The irregular hook groove has a connecting protrusion protruding from the outer peripheral surface. The connecting protrusion is inclined towards the side close to the directional groove. Its back side forms a return groove and communicates with the directional groove. One side of the connecting protrusion is connected to the outer peripheral surface of the lower mounting part, and the other side is connected to a locking block. The locking block is suspended in the irregular hook groove through the connecting protrusion. The locking block has a locking groove for limiting the locking point. The locking groove is located at the end of the guide groove near the connecting protrusion and communicates with the guide groove. The irregular hook groove also includes a transition groove that connects the return groove and the locking groove.

[0008] The present invention, possessing the above-mentioned features, guides the initial downward pressure direction of the locking point by setting a directional groove, thus preventing the locking point from shifting during pressing; by setting an inclined guide groove, the spring twists and generates torque when pressed down, and when the locking point moves to the end of the guide groove, it is locked into the locking groove under the return action of the spring torque; the return groove of the connecting protrusion and the transition groove form an unlocking path, and when pressed down again, the locking point enters the return groove through the transition groove to achieve unlocking; the unlocking path and the self-locking path are set separately and do not interfere with each other; by setting a connecting protrusion, the locking block is suspended in the irregular hook groove.

[0009] A further feature of the present invention is that the upper positioning part is provided with a first positioning block that abuts against the starting end of the spring, and the lower positioning part is provided with a second positioning block that abuts against the ending end of the spring.

[0010] The present invention, which has the above features, uses a positioning block to abut against the starting end and the ending end of the spring to fix the spring in the installation position, and at the same time provides a torsional fulcrum when the spring is compressed.

[0011] A further feature of the present invention is that both the upper guide portion and the lower mounting portion are tubular, the outer diameter of the upper guide portion is the same as the inner diameter of the lower mounting portion, and when the spring is sleeved outside the lower mounting portion, the upper positioning portion is a first annular edge disposed on the outer peripheral surface of the upper end of the upper guide portion, the first positioning block is disposed on the end face of the first annular edge facing the lower positioning portion, and the lower positioning portion is a second annular edge disposed on the outer peripheral surface of the lower end of the lower mounting portion, the second positioning block is disposed on the end face of the second annular edge facing the upper positioning portion.

[0012] The present invention having the above features is the first embodiment of a self-locking spring, in which the upper positioning part and the lower positioning part are located on the outside, which facilitates the external installation of the spring; the equal diameter tubular structure ensures the coaxiality of the upper guide part and the lower mounting part, reduces radial sway during sliding, and improves pressing stability.

[0013] A further feature of the present invention is that both the lower mounting portion and the upper guide portion are tubular, the outer diameter of the upper guide portion is the same as the inner diameter of the lower mounting portion, and when the spring is placed inside the upper guide portion, the upper positioning portion is a first annular edge disposed on the inner wall of the upper end of the upper guide portion, the first positioning block is disposed on the end face of the first annular edge facing the lower positioning portion, the lower positioning portion is a second annular edge disposed on the inner wall of the lower end of the lower mounting portion, and the second positioning block is disposed on the end face of the second annular edge facing the upper positioning portion.

[0014] The present invention having the above features: This is the second embodiment of the self-locking spring, in which the upper positioning part and the lower positioning part are disposed on the inner side, which facilitates the internal installation of the spring.

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention.

[0017] Figure 2 This is an exploded view of Embodiment 1 of the present invention.

[0018] Figure 3 This is a schematic diagram of the outer structure of the irregular hook groove in an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the inner structure of the irregular hook groove in an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0021] Figure 6 This is a cross-sectional view of Embodiment 2 of the present invention.

[0022] Figure 7 This is an exploded view of Embodiment 2 of the present invention. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings: like Figure 1-7The self-locking spring shown includes a spring 1, a pressing member 2, and a base 3. The pressing member 2 includes an upper positioning part 21 and an upper guide part 22 for positioning the starting end of the spring 1. The base 3 includes a lower positioning part 31 and a lower mounting part 32 for positioning the ending end of the spring 1. The upper positioning part 21 is provided with a first positioning block 211 that abuts against the starting end of the spring 1, and the lower positioning part 31 is provided with a second positioning block 311 that abuts against the ending end of the spring 1. The lower mounting part 32 is sleeved on the upper guide part 22. The upper guide part 22 can slide within the lower mounting part 32. The spring 1 is sleeved outside the lower mounting part 32 or placed inside the upper guide part 22. The outer peripheral surface of the upper guide part 22 is provided with a locking point 221, and the outer peripheral surface of the lower mounting part 32 is provided with a shaped hook groove 321. When the pressing member 2 is pressed down, the locking point 221 moves along the shaped hook groove 321 until it is stuck in the shaped hook groove 321 to achieve self-locking. When the pressing member 2 is pressed down during self-locking, the locking point 221 disengages from the shaped hook groove 321 to achieve unlocking.

[0024] The irregular hook groove 321 includes a directional groove 3211 arranged vertically. One end of the directional groove 3211 is located on the end face of the lower mounting part 32 and has an opening communicating with the outside. The other end is connected to a guide groove 3212. The guide groove 3212 is inclined towards the side away from the directional groove 3211. The irregular hook groove 321 has a connecting protrusion 322 protruding from the outer peripheral surface. The connecting protrusion 322 is inclined towards the side close to the directional groove 3211, and its back side forms a return groove 3213 that communicates with the directional groove 3211. One side of the protrusion 322 is connected to the outer peripheral surface of the lower mounting part 32, and the other side is connected to a locking block 323. The locking block 323 is suspended in the irregular hook groove 321 via the connecting protrusion 322. The locking block 323 is provided with a locking groove 3214 for limiting the locking point 221. The locking groove 3214 is located at the end of the guide groove 3212 near the connecting protrusion 322 and communicates with the guide groove 3212. The irregular hook groove 321 also includes a transition groove 3215 that connects the return groove 3213 and the locking groove 3214. There are four implementation methods for the structure of the pressing part and the base: Example 1: Both the upper guide portion 22 and the lower mounting portion 32 are tubular. The outer diameter of the upper guide portion 22 is the same as the inner diameter of the lower mounting portion 32. When the spring 1 is sleeved on the lower mounting portion 32, the upper positioning portion 21 is a first annular edge on the outer peripheral surface of the upper end of the upper guide portion 22, and the first positioning block 211 is a side end face of the first annular edge facing the lower positioning portion 31. The lower positioning portion 31 is a second annular edge on the outer peripheral surface of the lower end of the lower mounting portion 32, and the second positioning block 311 is a side end face of the second annular edge facing the upper positioning portion 21.

[0025] Example 2: Both the lower mounting part 32 and the upper guide part 22 are tubular. The outer diameter of the upper guide part 22 is the same as the inner diameter of the lower mounting part 32. When the spring 1 is placed inside the upper guide part 22, the upper positioning part 21 is the first annular edge of the upper inner wall of the upper guide part 22, and the first positioning block 211 is disposed on the side end face of the first annular edge facing the lower positioning part 31. The lower positioning part 31 is the second annular edge of the lower inner wall of the lower mounting part 32, and the second positioning block 311 is disposed on the side end face of the second annular edge facing the upper positioning part 21.

[0026] A downward pressure is applied to the upper positioning part of the pressing part, compressing the spring. The locking point moves downward along the directional groove. Guided by the guide groove, the locking point moves along its inclined path. At this time, the spring twists to generate torque. When the locking point disengages from the limit of the guide groove from the end of the guide groove, the spring's return force locks the locking point into the locking groove, realizing spring self-locking. To unlock, a downward pressure is applied to the upper positioning part again until the locking point disengages from the locking groove and enters the transition groove. Under the spring force, the locking point enters the return groove and returns to the directional groove, thus unlocking.

Claims

1. A self-locking spring, characterized in that: The device includes a spring, a pressing component, and a base. The pressing component includes an upper guide portion and an upper positioning portion for positioning the starting end of the spring. The base includes a lower mounting portion and a lower positioning portion for positioning the ending end of the spring. The lower mounting portion slides relative to the upper guide portion. The spring is externally or internally mounted. The upper guide portion has a locking point. The outer circumferential surface of the lower mounting portion has a shaped hook groove adapted to the locking point. When the pressing component is pressed down, the locking point moves along the shaped hook groove until it is locked in the shaped hook groove to achieve self-locking. When the pressing component is pressed down during self-locking, the locking point disengages from the shaped hook groove to achieve unlocking.

2. The self-locking spring according to claim 1, characterized in that: The irregular hook groove includes a directional groove arranged vertically. One end of the directional groove is located on the end face of the lower mounting part and has an opening that communicates with the outside. The other end is connected to a guide groove. The guide groove is inclined towards the side away from the directional groove. The irregular hook groove has a connecting protrusion protruding from the outer peripheral surface. The connecting protrusion is inclined towards the side close to the directional groove. Its back side forms a return groove and communicates with the directional groove. One side of the connecting protrusion is connected to the outer peripheral surface of the lower mounting part, and the other side is connected to a locking block. The locking block is suspended in the irregular hook groove through the connecting protrusion. The locking block has a locking groove for limiting the locking point. The locking groove is located at the end of the guide groove near the connecting protrusion and communicates with the guide groove. The irregular hook groove also includes a transition groove that connects the return groove and the locking groove.

3. The self-locking spring according to claim 1 or 2, characterized in that: The upper positioning part is provided with a first positioning block that abuts against the starting end of the spring, and the lower positioning part is provided with a second positioning block that abuts against the ending end of the spring.

4. The self-locking spring according to claim 3, characterized in that: Both the upper guide portion and the lower mounting portion are tubular. The outer diameter of the upper guide portion is the same as the inner diameter of the lower mounting portion. When the spring is sleeved outside the lower mounting portion, the upper positioning portion is a first annular edge on the outer circumferential surface of the upper end of the upper guide portion. The first positioning block is located on the side end face of the first annular edge facing the lower positioning portion. The lower positioning portion is a second annular edge on the outer circumferential surface of the lower end of the lower mounting portion. The second positioning block is located on the side end face of the second annular edge facing the upper positioning portion.

5. The self-locking spring according to claim 3, characterized in that: Both the lower mounting portion and the upper guide portion are tubular. The outer diameter of the upper guide portion is the same as the inner diameter of the lower mounting portion. When the spring is placed inside the upper guide portion, the upper positioning portion is a first annular edge disposed on the inner wall of the upper end of the upper guide portion. The first positioning block is disposed on the end face of the first annular edge facing the lower positioning portion. The lower positioning portion is a second annular edge disposed on the inner wall of the lower end of the lower mounting portion. The second positioning block is disposed on the end face of the second annular edge facing the upper positioning portion.

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