Coil spring device and stay wire encoder

Abstract

The application relates to the technical field of encoders, in particular to a coil spring device and a stay wire encoder. The coil spring device comprises a fixed seat, a rotating seat which is sleeved outside the fixed seat and can rotate around the fixed seat, a first end cover which is arranged at one end of the rotating seat and cooperates with the rotating seat and the fixed seat to define a coil spring cavity, and a coil spring which is arranged in the coil spring cavity and has an inner end and an outer end, wherein the outer end is connected with the rotating seat, the inner end is provided with a bending part, and the fixed seat is provided with a reverse stopping tooth part matched with the bending part; when the coil spring is tightened, the bending part is clamped with the reverse stopping tooth part, and when the coil spring rebounds, the bending part can be separated from the reverse stopping tooth part. The coil spring device can protect the inner end of the coil spring during work, release redundant kinetic energy, improve the service life of the coil spring, and realize reuse of the coil spring; and the coil spring is arranged in the coil spring cavity, the installation size is small, and installation space can be saved.

Description

Technical Field

[0001] This application relates to the field of encoder technology, and more specifically, to a coiled spring device and a pull-wire encoder. Background Technology

[0002] A draw-wire encoder is a precision measuring device that converts linear displacement into an electrical signal. Its basic principle is to stretch a flexible wire, causing an internal sensing element to rotate, thereby converting linear displacement into a measurable rotational quantity, and ultimately outputting a corresponding analog or digital signal. Due to its outstanding advantages such as a large measurement range, small installation space, high integration, and convenient installation, it is widely used in positioning, measurement, and feedback control systems in fields such as industrial automation, engineering machinery, aerospace, and smart warehousing.

[0003] To enable reusability and automatic reset of draw-wire encoders, existing draw-wire encoders generally integrate a coil spring mechanism. The core of the mechanism is a pre-tensioned spiral spring (clock spring), which stores elastic potential energy when the wire is pulled out. After the external force is released, it drives the winding drum to rewind the wire, restoring the draw-wire encoder to its initial test state.

[0004] However, in actual use, the following problems exist: The clamping structure of the inner end of the coil spring on the rotating shaft is usually clamped by a pin, fixed by a screw, tightened by a screw, or fastened by a hook. When the pull wire of the pull wire encoder breaks or falls off for some reason, the coil spring mechanism rebounds quickly and deforms under the action of inertial force, making it unusable and causing the entire pull wire encoder to fail, so that the pull wire encoder cannot operate normally. Utility Model Content

[0005] In view of this, this application aims to provide a coil spring device and a wire encoder that can solve the problem in the related art that coil springs are easily deformed or broken, resulting in them being unusable.

[0006] According to a first aspect of this application, a coiling spring device is provided, comprising: a fixed seat; a rotating seat sleeved on the outside of the fixed seat and rotatable around the fixed seat; a first end cap disposed at one end of the rotating seat and defining a coiling spring cavity together with the rotating seat and the fixed seat; and a coiling spring disposed in the coiling spring cavity, the coiling spring having an inner end and an outer end, the outer end being connected to the rotating seat, the inner end having a bent portion, and the fixed seat having a check tooth portion that cooperates with the bent portion; when the coiling spring is tightened, the bent portion and the check tooth portion engage, and when the coiling spring rebounds, the bent portion can separate from the check tooth portion.

[0007] In the above technical solution, the selective engagement of the bending section and the anti-reverse tooth section can protect the inner end of the coil spring during operation, release excess kinetic energy, and thus improve the service life of the coil spring, thereby achieving the reuse of the coil spring. Furthermore, the coil spring is installed inside the coil spring cavity, resulting in a small installation size and saving installation space.

[0008] In some technical solutions, the coil spring device may optionally include a pull wire; one end of the pull wire is fixed to the rotating seat and wrapped around the outside of the rotating seat to drive the rotating seat to rotate.

[0009] In the above technical solution, by setting the pull cable on the outside of the rotating seat, the pull cable can be replaced quickly without replacing the coil spring, thereby saving maintenance costs.

[0010] In some technical solutions, the anti-reverse tooth may optionally include a front face, a back face, and a tip. The back face is an arc surface and smoothly transitions to the outer edge of the fixing seat; the front face intersects with the outer edge of the fixing seat to form a tooth groove; the front face and the back face intersect to form a tip; the cross section of the anti-reverse tooth gradually changes from narrow to wide from the tip to the fixing seat.

[0011] In the above technical solution, the front surface of the tooth serves as the locking surface. When the coil spring rotates counterclockwise, the bent part is located inside the tooth groove and makes rigid contact with the front surface of the tooth, forming a mechanical lock. When the coil spring rotates clockwise, the bent part slides out of the tooth groove and slides back into the tooth groove via the sliding guide on the back surface of the tooth, making the rotation smoother.

[0012] In some technical solutions, optionally, there are multiple anti-reverse teeth, which are arranged at intervals along the circumference of the fixed seat.

[0013] This allows the bend to be positioned at multiple locations, thus improving the flexibility of rotation.

[0014] In some technical solutions, optionally, the tips of multiple anti-reverse teeth are located on the same circumference; and / or multiple anti-reverse teeth are evenly spaced along the circumference of the fixed seat.

[0015] This ensures the strength and reliability of each locking action, thus avoiding locking failures caused by inconsistent tooth depth. Furthermore, the evenly spaced, circumferential arrangement of multiple anti-reverse teeth along the fixing base prevents the risk of jamming or ineffective locking at certain locations due to uneven tooth distribution.

[0016] In some technical solutions, the coil spring device may optionally include a first bearing disposed between the rotating seat and the fixed seat.

[0017] In the above technical solution, by setting a first bearing, on the one hand, the rotating seat can rotate more smoothly; on the other hand, it can also avoid shaking or deviation.

[0018] According to a second aspect of this application, a draw-wire encoder is provided, comprising: a rotating shaft; a coil spring device as provided in any of the above-described technical solutions; wherein a first end of the rotating shaft is connected to a first end cap. Thus, the draw-wire encoder possesses all the beneficial effects of any of the above-described technical solutions, which will not be elaborated further here.

[0019] In some technical solutions, the pull-wire encoder may optionally include: a mounting base disposed on the side of the fixed base opposite to the first end cover, the mounting base having an electronic cavity; wherein the fixed base has a shaft hole communicating with the electronic cavity, wherein a rotating shaft is disposed in the shaft hole, and the second end of the rotating shaft is rotatably connected to the mounting base; a magnetic component disposed at the second end of the rotating shaft; and a circuit board disposed in the electronic cavity and disposed opposite to the magnetic component, the circuit board having a sensing element for sensing changes in the magnetic field of the magnetic component.

[0020] In the above technical solution, measurement is achieved by the cooperation of magnetic components and sensing elements on the circuit board. There is no physical contact between the two, which realizes non-contact measurement and helps to improve service life.

[0021] In some technical solutions, the circuit board and the mounting base are optionally connected.

[0022] In some technical solutions, the wire encoder may optionally include a second bearing disposed between the second end of the rotating shaft and the mounting base.

[0023] In the above technical solution, by setting a second bearing, on the one hand, the rotating shaft can rotate more smoothly; on the other hand, it can also avoid wobbling or deviation.

[0024] In some technical solutions, the mounting base may optionally have an opening, which is positioned opposite to the rotating shaft; the wire encoder may also include a second end cover that covers the opening. This facilitates assembly.

[0025] In some technical solutions, the pull-wire encoder may optionally include: a connector located on one side of the mounting base; and a connecting wire connected to the circuit board via the connector.

[0026] In the above technical solution, the draw-wire encoder achieves electrical connection through connectors and connecting wires to transmit the output signal to the target device. On one hand, the connector provides a standardized interface, making the installation and removal of the connecting wires more convenient and quick. On the other hand, the connector can effectively reduce signal loss and interference during transmission, improving the quality of signal transmission.

[0027] Additional aspects and advantages of the technical solutions of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0028] Figure 1 This is one of the structural schematic diagrams of the draw-wire encoder provided in the embodiments of this application; Figure 2 This is a second schematic diagram of the structure of the draw-wire encoder provided in the embodiments of this application; Figure 3 This is the third schematic diagram of the structure of the draw-wire encoder provided in the embodiments of this application; Figure 4 This is the fourth structural schematic diagram of the wire encoder provided in the embodiments of this application.

[0029] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows: 100 Spring coiling device; 110 Fixed seat; 112 Anti-reverse tooth; 1121 Tooth front face; 1122 Tooth back face; 1123 Tooth tip; 1124 Tooth groove; 114 Shaft hole; 120 Rotary seat; 130 First end cover; 140 Spring coiling; 142 Outer end; 144 Inner end; 146 Bending part; 150 Spring coiling cavity; 160 Pull wire; 170 First bearing; 200 Pull-wire encoder; 210 Rotary shaft; 211 First end; 212 Second end; 220 Mounting base; 222 Electronic cavity; 224 Opening; 230 Magnetic component; 240 Circuit board; 242 Sensing element; 250 Second bearing; 260 Second end cover; 272 Connector; 274 Connecting wire. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0031] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0032] Currently, draw-wire encoders on the market are mainly classified into two types based on the placement of the wire rope: internal wire rope type and external wire rope type. The external wire rope type means the wire rope is exposed outside the encoder. This type generally has the advantage of convenient and quick wire rope replacement. However, in practical use, the following problems exist: External draw-wire encoders are mainly used in complex environments where the wire ropes are frequently replaced. However, currently available external draw-wire encoders typically require the internal coil spring or the entire encoder to be replaced when the wire rope is changed. Given the complex installation process and environment, replacing the internal coil spring or the entire encoder is not suitable for the field application and also poses safety risks.

[0033] To enable reusability and automatic reset of draw-wire encoders, existing draw-wire encoders generally integrate a coil spring mechanism. The core of this mechanism is a pre-tensioned spiral spring (a clockwork spring), which stores elastic potential energy when the wire is pulled out. After the external force is released, it drives the winding drum to rewind the wire, restoring the encoder to its initial test state. However, the connection between the inner end of the coil spring and the shaft is typically achieved through pin clamping, screw fixing, screw tightening, or hook fastening. When the wire breaks or detaches from the draw-wire encoder, the coil spring mechanism rebounds rapidly, causing deformation or breakage under inertial force, rendering it unusable. This is one of the most common failure modes of draw-wire encoders. In complex installation environments and urgent application situations, the inability to quickly reuse the draw-wire encoder can lead to the failure of the entire encoder, preventing it from operating normally.

[0034] In response to this situation, related technologies include adding a damping device to the wire encoder to prevent the spring from rebounding too quickly and causing damage. However, the damping device takes up a lot of space, has low flexibility, and poor versatility compared to the small size of the wire encoder.

[0035] In view of this, in order to achieve spring reuse without occupying additional space, refer to Figure 1 , Figure 2 and Figure 3This application provides a coiling spring device 100, including: a fixed seat 110, a rotating seat 120, a first end cap 130, and a coiling spring 140. The rotating seat 120 is sleeved on the outside of the fixed seat 110; the first end cap 130 is disposed at one end of the rotating seat 120 and together with the rotating seat 120 and the fixed seat 110 defines a coiling spring cavity 150; the coiling spring 140 is disposed in the coiling spring cavity 150, and the coiling spring 140 has an inner end 144 and an outer end 142, the outer end 142 being connected to the rotating seat 120; wherein, the inner end 144 is provided with a bent portion 146, and the fixed seat 110 is provided with a backstop tooth portion 112 that cooperates with the bent portion 146; when the coiling spring 140 is tightened, the bent portion 146 and the backstop tooth portion 112 engage; when the coiling spring 140 rebounds, the bent portion 146 and the backstop tooth portion 112 separate. In this way, when the rotating seat 120 rotates and causes the coil spring 140 to tighten, even if an unexpected situation occurs and the coil spring 140 rebounds rapidly, causing the rotating seat 120 to rotate in the opposite direction, due to inertia, the coil spring 140 will continue to rotate clockwise after reaching its initial state until the kinetic energy is dissipated. At this time, the anti-reverse tooth 112 of the fixed seat 110 disengages from the bent portion 146 of the inner end 144 of the coil spring 140, releasing excess inertial kinetic energy and preventing the coil spring device 100 from being damaged by impact. When the coil spring device 100 needs to work again, simply rotate the rotating seat 120 again to tighten the coil spring 140. At the same time, the bent portion 146 and the anti-reverse tooth 112 re-engage, and the coil spring device 140 can return to its normal working state. This coiling spring device 140 can release excess kinetic energy during operation, protect the coiling spring 140, improve the service life of the coiling spring 140, and thus realize the reuse of the coiling spring 140. At the same time, the coiling spring 140 is housed in the coiling spring cavity 150, which occupies little space.

[0036] It is understood that the spring coiling device 100 provided in this application can be used in wire encoders or other devices that require spring rewinding.

[0037] The following is combined with Figures 1 to 4 The spring coil device 100 and the wire encoder 200 provided in this application will be described in detail through specific embodiments and application scenarios.

[0038] Reference Figure 1 , Figure 2 and Figure 3 In some embodiments, this application provides a coil spring device 100, including a fixed base 110, a rotating base 120, a first end cap 130, and a coil spring 140.

[0039] The rotating seat 120 is sleeved on the outside of the fixed seat 110. A first end cap 130 is disposed at one end of the rotating seat 120, defining a spring cavity 150 together with the rotating seat 120 and the fixed seat 110. A spring 140 is disposed within the spring cavity 150; the spring 140 has an outer end 142 and an inner end 144. The outer end 142 is connected to the rotating seat 120, and the inner end 144 has a bent portion 146. The fixed seat 110 has a check tooth 112 that engages with the bent portion 146. When the spring 140 is tightened, the bent portion 146 and the check tooth 112 engage; when the spring 140 rebounds, the bent portion 146 disengages from the check tooth 112.

[0040] Specifically, the rotating seat 120 is sleeved on the outside of the fixed seat 110 and can rotate around the fixed seat 110.

[0041] The first end cap 130 is disposed at one end of the rotating base 120, and together with the rotating base 120 and the fixed base 110, defines the spring cavity 150. The spring cavity 150 provides a relatively enclosed space for the spring 140, which on the one hand protects the spring 140 from external environmental interference, such as dust and debris; on the other hand, it also helps guide the movement of the spring 140. It is understood that the first end cap 130 and the rotating base 120 are detachably connected, that is, it can be a threaded connection or a screw connection, etc.

[0042] The coil spring 140 is the core component, and its main function is to store and release elastic potential energy. Its outer end 142 is connected to the rotating seat 120, and its inner end 144 is connected to the fixed seat 110. When the rotating seat 120 drives the outer end 142 of the coil spring 140 to rotate, causing the coil spring 140 to tighten, the coil spring 140 undergoes elastic deformation, storing energy. When release is needed, the coil spring 140 rebounds, converting the stored elastic potential energy into kinetic energy, driving the rotating seat 120 to rotate in the opposite direction. The bending portion 146 and the anti-reverse tooth portion 112 selectively engage. When the coil spring tightens, the bending portion 146 and the anti-reverse tooth portion 112 engage; when the coil spring 140 rebounds, the bending portion 146 and the anti-reverse tooth portion 112 can disengage. This means that the anti-reverse tooth portion 112 will not obstruct the bending portion 146, allowing the bending portion 146 to rotate freely and release excess energy.

[0043] In the above embodiment, the tightening direction of the coil spring 140 is set to counterclockwise, and the rebound direction is set to clockwise. Initially, the bent portion 146 and the anti-reverse tooth portion 112 are engaged. When the rotating seat 120 rotates counterclockwise, it drives the outer end 142 of the coil spring 140 connected to it to rotate together. Since the inner end 144 of the coil spring 140 is engaged with the fixed seat 110, the coil spring 140 deforms and tightens accordingly, thereby converting mechanical energy into elastic potential energy and storing it. When external conditions change, the coil spring 140 rebounds due to its own elastic restoring force. During the rebound process, the coil spring 140 converts the stored elastic potential energy into kinetic energy, driving the rotating seat 120 to rotate in the opposite direction (clockwise). During the rebound process of the coil spring 140, under the action of inertial force, the coil spring 140 will continue to rotate clockwise after reaching the initial state until the kinetic energy is lost. At this time, the bent part 146 and the anti-reverse tooth part 112 can disengage, thus protecting the inner end 144 of the coil spring 140 and preventing deformation and damage, thereby achieving reuse. When it needs to be reused, simply rotate the rotating seat 120 counterclockwise again to re-engage the bent part 146 and the anti-reverse tooth part 112 of the inner end 144 of the coil spring 140, restoring it to the initial state, and it can then work normally.

[0044] In the above embodiment, the selective engagement of the bending portion 146 and the anti-reverse tooth portion 112 can protect the inner end 144 of the coil spring 140 during operation, release excess kinetic energy, and improve the service life of the coil spring 140, thereby realizing the reuse of the coil spring 140. Furthermore, the coil spring 140 is installed inside the coil spring cavity 150, resulting in a small installation size and saving installation space.

[0045] Reference Figures 2 to 4 In some embodiments, the anti-reverse tooth portion 112 includes a front tooth face 1121, a back tooth face 1122, and a tooth tip 1123. The back tooth face 1122 is an arc surface and smoothly transitions to the outer edge of the fixing seat 110. The front tooth face 1121 intersects with the outer edge of the fixing seat 110 to form a tooth groove 1124. The front tooth face 1121 and the back tooth face 1122 intersect to form the tooth tip 1123. The cross-section of the anti-reverse tooth portion 112 gradually changes from narrow to wide from the tooth tip 1123 to the fixing seat 110.

[0046] In the above embodiment, the front face 1121 of the tooth serves as a locking surface. When the coil spring 140 rotates counterclockwise, the bent portion 146 is located within the tooth groove 1124 and rigidly contacts the front face 1121 of the tooth, forming a mechanical lock. When the coil spring 140 rotates clockwise, the bent portion 146 slides out of the tooth groove 1124 and slides into the tooth groove 1124 via the sliding guide of the back face 1122 of the tooth, making the rotation smoother.

[0047] In some embodiments, the coil spring device 100 further includes a pull wire 160, one end of which is fixed to the rotating seat 120 and wrapped around the outside of the rotating seat 120 to drive the rotating seat 120 to rotate.

[0048] Specifically, the pull cable 160 is used to transmit force or motion. During the pulling process, the tension generated by the pull cable 160 can drive the rotation of the rotating base 120, thereby driving the coil spring 140 to tighten and store energy. By placing the pull cable 160 on the outside of the rotating base 120, the pull cable can be replaced quickly without replacing the coil spring 140, thus saving maintenance costs.

[0049] Understandably, the pull cord 160 is made of materials with appropriate strength and flexibility, such as steel wire rope or high-strength fiber rope, to ensure that it is not easily damaged during frequent pulling operations.

[0050] Reference Figure 1 , Figure 3 and Figure 4 In some embodiments, there are multiple anti-reverse teeth 112, which are spaced apart circumferentially along the fixing base 110. The multiple anti-reverse teeth 112 can limit the bending portion 146 at different rotational positions. In this way, when the coil spring 140 rebounds too much, the bending portion 146 can move to the position of an adjacent or suitable anti-reverse tooth 112, so as to ensure that the anti-reverse tooth 112 and the bending portion 146 of the inner end 144 of the coil spring 140 can be reliably engaged, thereby improving the flexibility of rotation.

[0051] It is understood that the tips 1123 of the multiple anti-reverse teeth 112 are on the same circumference. In other words, the "depth" of each tooth groove 1124 is uniform. When the bent portion 146 of the coil spring 140 falls into any tooth groove 1124, its contact state and engagement depth with the locking surface (tooth face 1121) are consistent. This ensures the strength and reliability of locking each time, thereby avoiding locking failure due to inconsistent tooth groove depths 1124. It is understood that the multiple anti-reverse teeth 112 can be evenly spaced along the circumference of the fixed base 110. This avoids the risk of jamming or ineffective locking at certain positions due to uneven tooth distribution.

[0052] In some embodiments, the coil spring device 100 further includes a first bearing 170, which is disposed between the rotating seat 120 and the fixed seat 110. By providing the first bearing 170, on the one hand, friction can be reduced, making the rotating seat 120 rotate more smoothly; on the other hand, the first bearing 170 can also withstand certain radial and axial loads, thereby improving the stability of the rotating seat 120 during rotation and preventing wobbling or displacement.

[0053] Reference Figures 1 to 4 In some embodiments, this application also provides a draw-wire encoder 200, including a rotating shaft 210 and a coil spring device 100 disclosed in any of the above embodiments. The first end 211 of the rotating shaft 210 is connected to a first end cover 130. Thus, when the rotating base 120 rotates, the rotating shaft 210 connected to the first end cover 130 rotates synchronously. Therefore, measurement can be completed by detecting the rotation parameters of the rotating shaft 210. Thus, the draw-wire encoder 200 has all the beneficial effects of any of the above embodiments, which will not be elaborated further here.

[0054] In some embodiments, the draw-wire encoder 200 further includes a mounting base 220, a magnetic element 230, and a circuit board 240.

[0055] The mounting base 220 is located on the side of the fixed base 110 opposite to the first end cover 130. The mounting base 220 has an electronic cavity 222, and the fixed base 110 has a shaft hole 114, which communicates with the electronic cavity 222. The rotating shaft 210 is located in the shaft hole, and the second end 212 of the rotating shaft 210 is rotatably connected to the mounting base 220.

[0056] The magnetic component 230 is disposed at the second end 212 of the rotating shaft 210.

[0057] Circuit board 240 is disposed in electronic cavity 222 and is disposed opposite to magnetic component 230. Circuit board 240 is provided with sensing element 242 for detecting changes in magnetic field of magnetic component 230.

[0058] In the above embodiment, when the rotating base 120 rotates, the first end cap 130 connected to the rotating base 120 rotates synchronously, causing the rotating shaft 210 connected to the first end cap 130 to rotate accordingly. The magnetic component 230 disposed on the rotating shaft 210 rotates synchronously with the rotating shaft 210, causing a change in the magnetic field. The sensing element 242 on the circuit board 240 detects the change in the magnetic field caused by the rotation of the magnetic component 230 and converts it into an electrical signal, thereby completing the measurement.

[0059] Measurement is achieved by the cooperation of the magnetic component 230 and the sensing element 242 on the circuit board 240. There is no physical contact between the two, which realizes non-contact measurement and helps to improve the service life of the wire encoder 200.

[0060] It is understandable that the mounting base 220 can be integrally formed with the fixing base 110.

[0061] In some embodiments, the circuit board 240 and the mounting base 220 are connected.

[0062] In some embodiments, the draw-wire encoder 200 further includes a second bearing 250, which is disposed between the second end 212 of the rotating shaft 210 and the mounting base 220. By providing the second bearing 250, on the one hand, friction can be reduced, making the rotation of the rotating shaft 210 smoother; on the other hand, the second bearing 250 can also withstand certain radial and axial loads, thereby improving the stability of the rotating shaft 210 during rotation, avoiding wobbling or offset, and thus improving measurement accuracy.

[0063] In some embodiments, the mounting base 220 has an opening 224, which is disposed opposite to the rotating shaft 210. The pull-wire encoder 200 also includes a second end cap 260, which covers the opening 224.

[0064] The opening 224 provides a window for the assembly and subsequent maintenance of the draw-wire encoder 200, facilitating operator access. The second end cover 260, located on the opening 224, completely covers it, thus protecting the internal structure and improving the safety of the draw-wire encoder 200. It is understood that the second end cover 260 and the mounting base 220 are detachably connected, for example, by a threaded connection or a screw connection.

[0065] In some embodiments, the draw-wire encoder 200 further includes a connector 272 and a connecting wire 274. The connector 272 is disposed on one side of the mounting base 220, and the connecting wire 274 is connected to the circuit board 240 via the connector 272. The draw-wire encoder 200 achieves electrical connection through the connector 272 and the connecting wire 274 to transmit the output signal to the target device. On the one hand, the connector 272 provides a standardized interface, making the installation and removal of the connecting wire 274 more convenient and quick, facilitating assembly during production and maintenance and replacement during later use. On the other hand, the connector 272 can effectively reduce signal loss and interference during transmission, improving the quality of signal transmission.

[0066] Understandably, connector 272 can be a waterproof connector or an aviation connector, etc.

[0067] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0068] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A coiled spring device, characterized in that, include: Fixed base; A rotating seat is fitted onto the outside of the fixed seat and can rotate around the fixed seat; The first end cap is disposed at one end of the rotating seat and together with the rotating seat and the fixed seat, defines the spring cavity; A coil spring is disposed in the coil spring cavity. The coil spring has an inner end and an outer end. The outer end is connected to the rotating seat. The inner end is provided with a bent portion. The fixed seat is provided with a backstop tooth portion that cooperates with the bent portion. When the coil spring is tightened, the bent portion and the anti-reverse tooth portion engage; when the coil spring rebounds, the bent portion can separate from the anti-reverse tooth portion.

2. The coil spring device according to claim 1, characterized in that, The coil spring device also includes a pull wire; one end of the pull wire is fixed to the rotating seat and wrapped around the outside of the rotating seat to drive the rotating seat to rotate.

3. The coiled spring device according to claim 1, characterized in that, The anti-reverse tooth includes a front face, a back face, and a tip; the back face is an arc surface and smoothly transitions to the outer edge of the fixing seat; the front face intersects with the outer edge of the fixing seat to form a tooth groove; the front face and the back face intersect to form the tip; the cross section of the anti-reverse tooth gradually changes from narrow to wide from the tip to the fixing seat.

4. The coil spring device according to claim 3, characterized in that, There are multiple anti-reverse teeth, which are arranged at intervals along the circumference of the fixed seat.

5. The coil spring device according to claim 4, characterized in that, The tips of the multiple anti-reverse teeth are located on the same circumference; and / or The plurality of anti-reverse teeth are evenly spaced along the circumference of the fixed seat.

6. The coil spring device according to claim 1 or 2, characterized in that, Also includes: A first bearing is disposed between the rotating seat and the fixed seat.

7. A draw-wire encoder, characterized in that, include: Rotation axis: The coil spring device as described in any one of claims 1 to 6; The first end of the rotating shaft is connected to the first end cap.

8. The draw-wire encoder according to claim 7, characterized in that, The wire encoder also includes: A mounting base is disposed on the side of the fixed base opposite to the first end cover, and the mounting base is provided with an electronic cavity; wherein, the fixed base is provided with a shaft hole, the shaft hole and the electronic cavity are connected, the rotating shaft is disposed in the shaft hole, and the second end of the rotating shaft is rotatably connected to the mounting base; A magnetic component is disposed at the second end of the rotating shaft; A circuit board is disposed in the electronic cavity and is positioned opposite to the magnetic component. The circuit board is equipped with a sensing element for detecting changes in the magnetic field of the magnetic component.

9. The draw-wire encoder according to claim 8, characterized in that, The pull-wire encoder also includes a second bearing, which is disposed between the second end of the rotating shaft and the mounting base.

10. The draw-wire encoder according to claim 8 or 9, characterized in that, The mounting base has an opening, which is disposed opposite to the rotating shaft; wherein, the pull-wire encoder further includes a second end cover, which covers the opening.

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