Capacitive induction type roller encoder structure and mouse

Abstract

The utility model discloses a capacitance induction type roller encoder structure and mouse, the capacitance induction type roller encoder structure comprises a support and a roller which is installed on the support and can rotate around a rotating shaft, the side surface of the roller is provided with a circuit board and a metal guide sheet, the circuit board is provided with an annular emitting electrode, and the annular emitting electrode is provided with an annular receiving electrode. A plurality of receiving electrodes are also concentrically and uniformly distributed around the periphery of the emitting electrode; the guide sheet directly faces and is adjacent to the emitting electrode and the receiving electrode; the circuit board is fixedly arranged on the support, and the guide piece is arranged to rotate along with the idler wheel. The circuit board and the metal guide sheet are arranged on the side surface of the roller, and the interaction area between the emitting electrode and the receiving electrode is changed when the guide sheet rotates, so that a variable capacitance signal is generated, accurate detection of the angular displacement of the roller is realized, and a high-sensitivity and high-precision encoder detection mode is provided; the rotation condition of the roller can be accurately reflected, and the performance of the roller encoder is improved.

Description

Technical Field

[0001] This utility model relates to the field of encoder structure, specifically to a capacitive induction roller encoder structure. Background Technology

[0002] Roller encoders, commonly used electrical components, are primarily used to convert angular displacement into electrical signals. Also known as code disks, they are most commonly found in mice. When a user scrolls the mouse wheel, it drives the roller encoder to convert the angular displacement into an electrical signal, thus enabling the operation of computers and other electronic devices. Currently, there are many types of roller encoders, such as mechanical contact encoders, optical encoders, and magnetic encoders.

[0003] Currently, capacitive sensing is increasingly widely used in the field of switches and buttons. Its principle involves placing a transmitter (also called an emitter plate) and a receiver (also called a receiver plate) within the button, forming a capacitor between them. By changing the area of ​​their interaction—such as through relative movement or the addition of a movable conductive medium (like a metal guide plate)—the capacitance can be altered, thus generating a changing capacitive signal. Based on this principle, displacement (including linear or angular displacement) can be fed back using the capacitive signal. Therefore, the purpose of this innovation is to design a novel capacitive sensing roller encoder, providing the market with more choices of roller encoders. Utility Model Content

[0004] To address the aforementioned problems, this utility model aims to provide a capacitive induction type roller encoder structure and a mouse.

[0005] To achieve this technical objective, the present invention provides a capacitive induction roller encoder structure, comprising a bracket and a roller mounted on the bracket and capable of rotating around a pivot. The roller has a circuit board and a metal guide plate on its side.

[0006] A circular emitter is provided on the circuit board, and a plurality of receivers are evenly distributed around the emitter and at the center. A guide plate is directly opposite and adjacent to the emitter and receivers. The circuit board is fixedly mounted on a bracket, and the guide plate is configured to rotate together with the roller.

[0007] Preferably, the center of the annular emitter corresponds to the axis of rotation of the roller, and the emitter and receiver are both located in the same plane and are parallel to the guide plate and the side of the roller.

[0008] Preferably, each receiving electrode is identical and is evenly distributed around the outer periphery of the transmitting electrode; the area of ​​the guiding plate can be projected onto both the transmitting and receiving electrodes at least simultaneously.

[0009] Preferably, the side of the roller is provided with a receiving groove for accommodating the guide piece, and the guide piece is embedded in the receiving groove and rotates together with the roller.

[0010] Preferably, the guide plate has a positioning shaft hole at its center, and the guide plate is sleeved on the rotating shaft through the positioning shaft hole. The guide plate has a fan-shaped structure.

[0011] Preferably, the circuit board has a clearance through hole, and the rotating shaft passes through the clearance through hole to connect to the bracket.

[0012] Preferably, the inner wall of the roller is a ring-shaped rotor made of magnetic material, and a permanent magnet stator is coaxially arranged inside the ring-shaped rotor. The permanent magnet stator cooperates with the ring-shaped rotor to provide damping and tactile feedback to the roller using magnetic force.

[0013] Preferably, the roller is also equipped with a component for adjusting friction, which is used to apply damping to the roller to adjust the degree of freedom of the roller's rotation.

[0014] This application also provides a solution: a mouse including a scroll wheel encoder, wherein the scroll wheel encoder adopts the capacitive induction scroll wheel encoder structure of any of the above.

[0015] The beneficial effects of this invention are as follows: by setting a circuit board and a metal guide plate on the side of the roller, the interaction area between the emitter and receiver changes when the guide plate rotates, thereby generating a changing capacitance signal, which realizes the accurate detection of the roller's angular displacement. This provides a highly sensitive and accurate encoder detection method that can accurately reflect the rotation of the roller and improve the performance of the roller encoder. Attached Figure Description

[0016] Figure 1 This is one of the exploded views of this utility model;

[0017] Figure 2 This is the second exploded view of this utility model;

[0018] Figure 3 This is a schematic diagram of the circuit board and guide plate in this utility model;

[0019] Figure 4 This diagram shows the correspondence between the circuit board and the guide plate in this utility model.

[0020] Figure 5 This is a diagram showing the positional relationship between the circuit board and the guide plate in this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of this utility model.

[0022] In the diagram: 1. Bracket; 2. Roller; 201. Receiving groove; 3. Rotating shaft; 4. Circuit board; 401. Circular emitter; 402. Receiver; 403. Clearance through hole; 5. Guide plate; 501. Positioning shaft hole. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. To provide a clear and complete description of the technical solution, the following embodiments are selected for illustration; these embodiments are only some embodiments of the present invention; other embodiments obtained based on this application without creative effort are all within the scope of protection of the present invention.

[0024] In the following embodiments, it should be noted that the terms "upper," "lower," "left," "right," "inner," "outer," "top / bottom," etc., are all based on the orientation or positional relationship shown in the accompanying drawings and are only for the purpose of clearly describing this embodiment. They do not indicate or imply that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation of this application. At the same time, the terms "first" and "second" in the embodiments are only used for descriptive purposes and do not represent an indication or implication of relative importance.

[0025] like Figure 1-6 As shown, a specific embodiment of this utility model is a capacitive induction roller encoder structure, including a bracket 1 and a roller 2 mounted on the bracket 1 and rotatable around a shaft 3. A circuit board 4 and a metal guide plate 5 are disposed on the side of the roller 2. This capacitive induction roller encoder structure is based on the principle of capacitive induction, providing a novel technical solution in the field of roller encoders. It eliminates the need for complex mechanical contact parts or optical components, reducing manufacturing costs and failure rates. Unaffected by environmental factors such as dust and dirt, this roller encoder structure maintains high stability and reliability in various environments. Without the wear problems of mechanical contact parts, it significantly extends the service life of the roller encoder.

[0026] The circuit board 4 employs common circuit board manufacturing processes. A circular emitter 401 is positioned on the top of the circuit board 4, and a plurality of receivers 402 are evenly distributed around the emitter at the same center. Preferably, these receivers 402 have the same shape, size, and spacing. The guide plate 5 is a metal sheet with a certain thickness and area, directly opposite and adjacent to the emitter and receivers 402. The main frame of the circuit board 4 is fixedly mounted on the support 1, and the guide plate 5 is configured to rotate together with the roller 2.

[0027] When the user rotates the roller 2, the guide plate 5 rotates accordingly. Since the guide plate 5 is made of metal, it changes the area of ​​interaction between the emitter and receiver 402, thereby changing the capacitance formed between them and generating a changing capacitance signal. These capacitance signals are then processed by subsequent circuitry to convert the angular displacement of the roller 2 rotation into an electrical signal output.

[0028] In this design, the center of the annular emitter 401 corresponds to the axis of rotation 3 of the roller 2, and both the emitter and receiver 402 are located on the same plane, which is parallel to the plane where the guide plate 5 is located and the side of the roller 2. This parallel mounting structure ensures that the distance between the guide plate 5 and the emitter and receiver 402 remains relatively stable during rotation, thereby improving the stability and accuracy of the capacitive signal.

[0029] To ensure the stability of the guide piece 5, this design includes a receiving groove 201 on the side of the roller 2 to accommodate the guide piece 5. The guide piece 5 has a fan-shaped structure, and the receiving groove 201 is the same size as the guide piece 5. The receiving groove 201 can protect and position the guide piece 5, effectively preventing it from shifting or shaking during rotation. At the same time, the fan-shaped structure of the guide piece 5 better adapts to the shape of the roller 2, reducing space occupation.

[0030] To facilitate installation and positioning, the center of the guide plate 5 is provided with a positioning shaft hole 501. The guide plate 5 is sleeved on the rotating shaft 3 through the positioning shaft hole 501 and is embedded in the receiving groove 201 and rotates together with the roller 2.

[0031] To optimize space utilization, a clearance through-hole 403 is provided on the circuit board 4, through which the rotating shaft 3 passes and connects to the bracket 1. By providing a clearance through-hole on the circuit board 4, the rotating shaft can pass smoothly through the circuit board, avoiding spatial conflicts between the rotating shaft 3 and the circuit board 4, making the entire device structure more compact.

[0032] The encoder structure of this solution has the function of adjusting the tactile feedback. The inner wall of the roller 2 is a ring rotor made of magnetic material. A permanent magnet stator is coaxially arranged inside the ring rotor. The permanent magnet stator cooperates with the ring rotor to provide damping and tactile feedback to the roller 2 using magnetic force.

[0033] The encoder in this solution is preferably an absolute encoder. The roller 2 is also equipped with a component for adjusting friction, which is used to apply damping to the roller 2 to adjust the degree of freedom of the roller rotation. Publication number CN119883015A discloses an inductive encoder with adjustable feel force, which describes in detail the encoder's segments and damping adjustment structure, and will not be repeated here.

[0034] This application also provides a mouse solution that uses the above-described capacitive inductive scroll wheel encoder structure.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any minor modifications, equivalent substitutions and improvements made to the above embodiments based on the technical essence of the present utility model should be included within the protection scope of the technical solution of the present utility model.

Claims

1. A capacitive inductive roller encoder structure comprising a support (1) and a roller (2) mounted on the support (1) so as to be able to rotate about an axis of rotation (3), characterized in that, The side of the roller (2) is provided with a circuit board (4) and a metal guide plate (5), wherein, A circular emitter (401) is provided on the circuit board (4), and a plurality of receivers (402) are evenly distributed around the periphery of the emitter and the center of the circle; the guide plate (5) is directly opposite to and adjacent to the emitter (401) and the receiver (402); the circuit board (4) is fixedly mounted on the bracket (1), and the guide plate (5) is configured to rotate together with the roller (2).

2. The capacitive inductive roller encoder structure according to claim 1, characterized in that, The center of the annular emitter (401) corresponds to the axis of the roller (2) shaft (3). The emitter (401) and the receiver (402) are both located on the same plane and are parallel to each other with the guide plate (5) and the side of the roller (2).

3. The capacitive inductive roller encoder structure according to claim 2, characterized in that, Each of the receiving electrodes (402) is identical and is evenly distributed around the outer periphery of the transmitting electrode (401); the area of ​​the guide plate (5) can be projected onto the transmitting electrode (401) and the receiving electrode (402) at least simultaneously.

4. The capacitive inductive roller encoder structure according to claim 3, characterized in that, The roller (2) has a receiving groove (201) on its side for accommodating the guide piece (5), and the guide piece (5) is embedded in the receiving groove (201) and rotates together with the roller (2).

5. The capacitive inductive roller encoder structure according to claim 4, characterized in that, The guide plate (5) has a positioning shaft hole (501) at its center. The guide plate (5) is sleeved on the rotating shaft (3) through the positioning shaft hole (501). The guide plate (5) has a fan-shaped structure.

6. The capacitive inductive roller encoder structure according to claim 5, characterized in that, The circuit board (4) has a clearance through hole (403), and the rotating shaft (3) passes through the clearance through hole (403) and is connected to the bracket (1).

7. The capacitive inductive roller encoder structure according to claim 6, characterized in that, The inner wall of the roller (2) is a ring rotor made of magnetic material. A permanent magnet stator is coaxially arranged inside the ring rotor. The permanent magnet stator cooperates with the ring rotor to provide damping and tactile feedback to the roller using magnetic force.

8. The capacitive inductive roller encoder structure of claim 6, wherein, The roller (2) is also equipped with a component for adjusting friction, which is used to apply damping to the roller to adjust the degree of freedom of the roller rotation.

9. A mouse comprising a scroll wheel encoder, characterized in that, The roller encoder adopts the capacitive induction roller encoder structure of any one of claims 1-8.

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