A compression spring sensor

Abstract

The application discloses a compression spring type sensor, which comprises a shell, a rotating shaft, a magnet and a control board, the rotating shaft is rotatably connected to the shell, a fan-shaped groove is formed in the shell, the rotating shaft is inserted into the fan-shaped groove, the shell is provided with a containing space which is isolated from the fan-shaped groove, the control board is fixed to the shell and located in the containing space, two groups of first holes are formed in the shell and symmetrically distributed with respect to the fan-shaped groove, a compression spring and a sliding block are arranged in each group of the first holes, the sliding block is inserted into the first hole and abuts against the rotating shaft, one end of the compression spring abuts against the sliding block, and the other end of the compression spring abuts against a limiting structure. The control board and the internal moving structure of the sensor are isolated, which can prevent the influence of glue on the moving mechanism during potting, avoid the influence of water and dust on the control board when the moving structure is affected by water and dust, and ensure that the zero position of the sensor has no large deviation through the symmetrically arranged compression springs, so that the stability of the data output of the sensor is ensured.

Description

Technical Field

[0001] This invention belongs to the field of sensor technology, specifically a spring-loaded sensor. Background Technology

[0002] Miniature spring-loaded sensors are commonly used components in control devices. Single-degree-of-freedom spring-loaded sensors typically use torsion springs as the reset mechanism. However, using torsion springs as the reset mechanism often leads to inaccurate zero-point positioning of the sensor, and the elastic coefficient of the torsion spring is unstable, requiring high-quality load-bearing materials. On the other hand, sensors often require high waterproofing during use, but in conventional spring-loaded sensors, the space where the motion mechanism and control board are located is connected, making potting or applying adhesive cumbersome. Adhesive can easily flow into the motion structure, or hardened adhesive can detach and enter the motion structure, affecting sensor operation. Furthermore, if water or dust enters the space where the motion mechanism is located, it will flow into the space where the control board is located, causing the potting compound to age. Summary of the Invention

[0003] The purpose of this invention is to provide a novel spring-loaded sensor to address the problems existing in the prior art.

[0004] The technical solution to achieve the purpose of this invention is as follows: a spring-loaded sensor, comprising a housing, a rotating shaft, a magnet fixed to the end of the rotating shaft, and a control board equipped with a Hall chip. The rotating shaft is rotatably connected to the housing. A fan-shaped groove is formed on the housing, and the rotating shaft is inserted into the fan-shaped groove. The housing has an accommodating space, and the accommodating space and the fan-shaped space are isolated from each other. The control board is fixed to the housing and is located in the accommodating space.

[0005] The housing has two sets of first holes, which are symmetrically distributed relative to the fan-shaped groove and are connected to the fan-shaped groove. Each set of first holes contains a compression spring and a slider. The compression spring sensor also includes a limiting mechanism, which is fixedly connected to the housing. The slider passes through the first hole and abuts against the rotating shaft. One end of the compression spring abuts against the slider, and the other end abuts against the limiting mechanism. The rotating shaft is reset by the compression spring. The axis of the magnet is perpendicular to the rotation center line of the rotating shaft.

[0006] Furthermore, the housing has two sets of second holes, which are symmetrically distributed relative to the fan-shaped groove and are connected to the fan-shaped groove. The diameter of the second hole is smaller than the diameter of the first hole. The center lines of the first hole and the second hole on the same side of the fan-shaped groove are collinear, and the first hole and the second hole on the same side of the fan-shaped groove are connected to each other. The spring-loaded sensor has a zero-position state. When the sensor is in the zero-position state, a part of the slider is located in the second hole, the other part of the slider is located in the first hole, and the spring is located in the first hole.

[0007] Furthermore, the slider includes a first sliding part and a second sliding part coaxially arranged, both the first sliding part and the second sliding part are cylindrical, and the end of the second sliding part abuts against the rotating shaft; the diameter of the first sliding part is greater than the diameter of the second sliding part, the diameter of the first sliding part is greater than the outer diameter of the compression spring, the diameter of the first sliding part is smaller than the diameter of the first hole, the diameter of the first sliding part is greater than the diameter of the second hole, and the diameter of the second sliding part is smaller than the diameter of the second hole.

[0008] Furthermore, a third hole extending along its own axis is provided on the first sliding part, and the diameter of the third hole is larger than the outer diameter of the compression spring.

[0009] Furthermore, the housing is provided with a limiting hole extending along its own thickness direction, and the axis of the limiting hole coincides with the rotation center line of the rotating shaft.

[0010] Furthermore, the spring-loaded sensor also includes two sets of bushings, which are respectively secured at both ends of the limiting hole; the rotating shaft is provided with two sets of cylindrical protrusions arranged symmetrically, the axis of the two sets of cylindrical protrusions is collinear, and the axis of the two sets of cylindrical protrusions is collinear with the rotation center line of the rotating shaft, and the two sets of cylindrical protrusions are respectively inserted into the two sets of bushings.

[0011] Furthermore, the spring-loaded sensor also includes a keycap, which is fixed to the upper end of the rotating shaft and located on the upper side of the housing. The lower surface of the keycap is an arc surface, the upper surface of the housing is an arc surface, and the diameter of the arc surface of the keycap is larger than the diameter of the arc surface of the housing.

[0012] Furthermore, the spring-loaded sensor also includes a housing, the limiting structure and the housing are integrally formed, and the housing and the casing are fixedly connected.

[0013] Furthermore, the bottom of the outer casing is provided with a cable outlet hole, which is an oblong hole; the outer casing is provided with a drainage hole extending along its own thickness direction.

[0014] Furthermore, the housing has an inclined surface located at the bottom of the fan-shaped groove, and the inclined surface extends obliquely downward along the thickness direction of the housing.

[0015] Compared with the prior art, the significant advantages of this invention are:

[0016] 1) By opening mutually isolating fan-shaped grooves and accommodating spaces on the housing, the control board and internal moving structure of the sensor are separated, which can prevent the glue from affecting the moving mechanism during potting and also prevent water and dust from entering the moving structure and affecting the control board.

[0017] 2) The housing is also provided with two sets of first holes symmetrically distributed with opposite fan-shaped slots. Each set of first holes is provided with a compression spring and a slider. The slider passes through the first hole and abuts against the rotating shaft. One end of the compression spring abuts against the slider and the other end of the compression spring abuts against the limiting structure. Through the symmetrically arranged compression springs, it can be ensured that the zero position of the sensor does not deviate too much, thus ensuring the stability of the sensor data output.

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the spring-loaded sensor of the present invention in one embodiment.

[0020] Figure 2 for Figure 1 Cross-sectional view of a medium-pressure spring sensor.

[0021] Figure 3 for Figure 1 A schematic diagram of the structure of a medium-pressure spring sensor after removing the outer casing.

[0022] Figure 4 This is a three-dimensional structural diagram of the housing of a spring-loaded sensor in one embodiment;

[0023] Figure 5 for Figure 4 Cross-sectional view.

[0024] Figure 6 This is a three-dimensional structural diagram of the housing of a spring-loaded sensor in one embodiment.

[0025] Figure 7 This is a schematic diagram of the structure of the rotating shaft and keycap in a spring-loaded sensor in one embodiment.

[0026] Figure 8 This is a schematic diagram of the slider in a spring-loaded sensor in one embodiment.

[0027] Reference numerals: 1. Housing; 10. Sector groove; 11. Accommodating space; 12. First hole; 13. Second hole; 14. Limiting hole; 15. Inclined surface; 2. Rotating shaft; 20. Cylindrical protrusion; 3. Magnet; 4. Control board; 5. Compression spring; 6. Slider; 60. First sliding part; 61. Second sliding part; 62. Third hole; 7. Bushing; 8. Keycap; 9. Housing; 90. Limiting structure; 91. Cable outlet; 92. Drain hole Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0029] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0031] In one embodiment, referring to the accompanying drawings, a spring-loaded sensor is provided, including a housing 1, a rotating shaft 2, a magnet 3 fixed to the end of the rotating shaft 2, and a control board 4 equipped with a Hall effect chip. Preferably, in this embodiment, the magnet 3 is a cylindrical magnet, and the magnetization direction is along the thickness direction of the magnet 3. See also... Figure 2 The rotating shaft 2 is rotatably connected to the housing 1. The housing 1 has a fan-shaped groove 10, and the rotating shaft 2 is inserted into the fan-shaped groove 10. The housing 1 has an accommodating space 11, which is isolated from the fan-shaped groove 10. The control board 4 is fixed on the housing 1 and is located in the accommodating space 11. In this way, even if water or dust enters the sensor's motion mechanism, the dust and water will not enter the accommodating space where the control board 4 is located, and will not affect the potting compound.

[0032] Furthermore, in one embodiment, see [link to relevant documentation]. Figure 5The housing 1 also has two sets of first holes 12, symmetrically distributed relative to the fan-shaped groove 10, and both sets of first holes 12 are connected to the fan-shaped groove 10. Each set of first holes 12 contains a compression spring 5 and a slider 6. The compression spring sensor also includes a limiting structure 90, which is fixedly connected to the housing 1. The slider 6 passes through the first hole 12 and abuts against the rotating shaft 2. One end of the compression spring 5 abuts against the slider 6, and the other end abuts against the limiting structure 90. The axis of the magnet 3 is always perpendicular to the rotation center line of the rotating shaft 2. In this embodiment, the rotating shaft 2 is reset by the compression spring 5. The two sets of compression springs 5 ​​are symmetrically arranged relative to the rotating shaft, which can ensure that the zero position of the sensor is not offset and ensure the stability of the sensor data output. See also Figure 1 , Figure 2 and Figure 6 The spring-loaded sensor also includes a housing 9, and a limiting structure 90 is integrally formed with the housing 9. The housing 9 and the housing 1 are fixedly connected. In some other embodiments, the limiting structure 90 may also be set separately according to the needs of use and installation, which is not limited here.

[0033] Furthermore, in one embodiment, see [link to relevant documentation]. Figure 4 and Figure 5 The housing 1 has two sets of second holes 13, which are symmetrically distributed relative to the fan-shaped groove 10. The two sets of second holes 13 are connected to the fan-shaped groove 10. The diameter of the second hole 13 is smaller than the diameter of the first hole 12. The axis of the first hole 12 and the axis of the second hole 13 on the same side of the fan-shaped groove 10 are collinear, and the first hole 12 and the second hole 13 on the same side of the fan-shaped groove 10 are connected to each other. The spring-loaded sensor has a zero position state. When the sensor is in the zero position state, part of the slider 6 is located in the second hole 13, and the other part of the slider 6 is located in the first hole 12. The spring 5 is located in the first hole 12.

[0034] Specifically, see Figure 8 The slider 6 includes a first sliding part 60 and a second sliding part 61 coaxially arranged. Preferably, both the first sliding part 60 and the second sliding part 61 are cylindrical. The end of the second sliding part 61 abuts against the rotating shaft 2, and the diameter of the first sliding part 60 is larger than the diameter of the second sliding part 61, which is also larger than the outer diameter of the compression spring 5. Simultaneously, the diameter of the first sliding part 60 is smaller than the diameter of the first hole 12, the diameter of the first sliding part 60 is larger than the diameter of the second hole 13, and the diameter of the second sliding part 61 is smaller than the diameter of the second hole 13. Thus, the end face of the first sliding part 60 can abut against the end face of the first hole 12. When the spring-loaded sensor is in the zero position, the second sliding part 61 passes through the second hole 13. When the rotating shaft 2 rotates to one side, the rotating shaft 2 pushes the slider 6 to move, thereby compressing the compression spring 5. When the external force is removed, the compression spring 5 pushes the slider 6 to move, thereby causing the rotating shaft 2 to return to the zero position.

[0035] In this embodiment, a third hole 62 extending along its own axis is provided on the first sliding part 60. The diameter of the third hole 62 is larger than the outer diameter of the compression spring 5, so as to avoid friction between the compression spring 5 and the hole wall of the first hole 12, which would affect the feel or cause abnormal noise and other adverse phenomena.

[0036] Furthermore, in one embodiment, see [link to relevant documentation]. Figure 3 , Figure 4 and Figure 7 As shown, the housing 1 has a limiting hole 14 extending along its own thickness direction, and the axis of the limiting hole 14 coincides with the rotation center line of the rotating shaft 2. The spring-loaded sensor also includes two sets of bushings 7, which are respectively engaged at both ends of the limiting hole 14. The rotating shaft 2 has two sets of symmetrically arranged cylindrical protrusions 20, whose axes are collinear and collinear with the rotation center line of the rotating shaft 2. The two sets of cylindrical protrusions 20 are respectively inserted into the two sets of bushings 7. This prevents the rotating shaft 2 from displacing along its own axial direction, and at the same time, after the housing 9 is installed, it prevents the bushings 7 from coming out of the limiting hole 14.

[0037] Furthermore, in one embodiment, see [link to relevant documentation]. Figure 7 The spring-loaded sensor also includes a keycap 8, which is fixed to the end of the rotating shaft 2. The lower surface of the keycap 8 is curved, and the upper surface of the housing 1 is also curved. The diameter of the curved surface of the keycap 8 is larger than the diameter of the curved surface of the housing 1. With this embodiment, the keycap 8 will not touch the housing 1 when the rotating shaft 2 rotates, and different types of keycaps 8 can be replaced according to the application scenario.

[0038] Furthermore, in one embodiment, see [link to relevant documentation]. Figure 2 and Figure 6 The bottom of the outer casing 9 is provided with a cable outlet hole 91, which is preferably an oblong hole.

[0039] Furthermore, in one embodiment, see [link to relevant documentation]. Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the housing 1 has an inclined surface 15 located at the bottom of the fan-shaped groove 10. The inclined surface 15 extends obliquely downward along the thickness direction of the housing 1. The outer shell 9 has a drain hole 92 extending along its own thickness direction. When water enters the sensor's moving mechanism, it can be drained through the lower surface 15 and the drain hole 92 to prevent water accumulation inside.

[0040] In summary, the spring-loaded sensor of the present invention has a rotating shaft 2 rotatably connected to a housing 1. A fan-shaped groove 10 is provided on the housing 1, and the rotating shaft 2 is inserted into the fan-shaped groove 10. The housing 1 has an accommodating space 11, which is isolated from the fan-shaped groove 10. The control board 4 is fixed to the housing 1 and located within the accommodating space 11. Thus, even if water or dust enters the sensor's moving mechanism, the dust and water will not enter the accommodating space where the control board 4 is located, and will not affect the potting compound. Furthermore, the housing 1 also has two sets of first holes 12 symmetrically distributed relative to the fan-shaped groove 10. Each set of first holes 12 contains a spring 5 and a slider 6. The slider 6 abuts against the rotating shaft 2, one end of the spring 5 abuts against the slider 6, and the other end abuts against the limiting structure 90. The rotating shaft 2 is reset by the spring 5. The two sets of springs 5 ​​are symmetrically arranged relative to the rotating shaft, ensuring that the sensor's zero position does not deviate significantly and guaranteeing the stability of the sensor's data output.

[0041] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A spring-loaded sensor, comprising a housing, a rotating shaft, a magnet fixed to the end of the rotating shaft, and a control board equipped with a Hall effect chip, characterized in that, The rotating shaft is rotatably connected to the housing. The housing has a fan-shaped groove, and the rotating shaft is inserted into the fan-shaped groove. The housing has an accommodating space, and the accommodating space and the fan-shaped groove are isolated from each other. The control board is fixed to the housing and is located in the accommodating space. The housing has two sets of first holes, which are symmetrically distributed relative to the fan-shaped groove and are connected to the fan-shaped groove. Each set of first holes contains a compression spring and a slider. The compression spring sensor also includes a limiting structure, which is fixedly connected to the housing. The slider passes through the first hole and abuts against the rotating shaft. One end of the compression spring abuts against the slider, and the other end abuts against the limiting structure. The rotating shaft is reset by the compression spring. The axis of the magnet is perpendicular to the rotation center line of the rotating shaft.

2. The spring-loaded sensor according to claim 1, characterized in that, The housing has two sets of second holes, which are symmetrically distributed relative to the fan-shaped groove and are connected to the fan-shaped groove. The diameter of the second hole is smaller than the diameter of the first hole. The center lines of the first hole and the second hole on the same side of the fan-shaped groove are collinear and are connected to each other. The spring-loaded sensor has a zero-position state. When the spring-loaded sensor is in the zero-position state, a part of the slider is located in the second hole, the other part of the slider is located in the first hole, and the spring is located in the first hole.

3. The spring-loaded sensor according to claim 2, characterized in that, The slider includes a first sliding part and a second sliding part arranged coaxially. Both the first sliding part and the second sliding part are cylindrical, and the end of the second sliding part abuts against the rotating shaft. The diameter of the first sliding part is greater than the diameter of the second sliding part, the diameter of the first sliding part is greater than the outer diameter of the compression spring, the diameter of the first sliding part is smaller than the diameter of the first hole, the diameter of the first sliding part is greater than the diameter of the second hole, and the diameter of the second sliding part is smaller than the diameter of the second hole.

4. The spring-loaded sensor according to claim 3, characterized in that, The first sliding part has a third hole extending along its own axis, and the diameter of the third hole is larger than the outer diameter of the compression spring.

5. The spring-loaded sensor according to claim 1, characterized in that, The housing has a limiting hole extending along its own thickness direction, and the axis of the limiting hole coincides with the rotation center line of the rotating shaft.

6. The spring-loaded sensor according to claim 5, characterized in that, The spring-loaded sensor also includes two sets of bushings, which are respectively secured at both ends of the limiting hole; the rotating shaft is provided with two sets of cylindrical protrusions arranged symmetrically, the axis of the two sets of cylindrical protrusions is collinear, and the axis of the two sets of cylindrical protrusions is collinear with the rotation center line of the rotating shaft, and the two sets of cylindrical protrusions are respectively inserted into the two sets of bushings.

7. The spring-loaded sensor according to claim 1, characterized in that, The spring-loaded sensor also includes a keycap, which is fixed to the upper end of the rotating shaft and located on the upper side of the housing. The lower surface of the keycap is an arc surface, the upper surface of the housing is an arc surface, and the diameter of the arc surface of the keycap is larger than the diameter of the arc surface of the housing.

8. The spring-loaded sensor according to claim 1, characterized in that, The spring-loaded sensor also includes a housing, and the limiting structure and the housing are integrally formed, with the housing and the casing being fixedly connected.

9. The spring-loaded sensor according to claim 8, characterized in that, The bottom of the outer casing has a cable outlet hole, which is an oblong hole; the outer casing has a drainage hole extending along its thickness direction.

10. The spring-loaded sensor according to claim 1, characterized in that, The housing has an inclined surface located at the bottom of the fan-shaped groove, and the inclined surface extends obliquely downward along the thickness direction of the housing.

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