Thin potentiometer with rotary disc

Abstract

This utility model relates to the field of potentiometers, and more particularly to a thin rotary potentiometer, including a rotating disk; it also includes a connecting post and a connecting plate. A marking strip is fixed to the upper end of the rotating disk. A limit groove is formed on the inner wall of the rotating disk, and the rotating disk is rotatably mounted on the inner wall of the upper limit groove. First connecting grooves are formed at the upper and lower ends of the rotating disk, and a connecting post is disposed within the first connecting groove. A connecting plate is fixed to the outer wall of the connecting post, and the connecting plate is located at the lower end of the rotating disk. A base is provided at the lower end of the rotating disk. This utility model uses the rotating disk to drive an independent individual brush and a positioning spring structure. The brush contacts the carbon sheet, and the positioning spring contacts the base. The positioning spring has two arms and two positioning points, and is balanced by the slots on the base, ensuring stable contact between the carbon sheet and the brush. This improves the problems of weak positioning force, uneven and unclear positioning torque, and the limitation to single-circuit products.

Description

Technical Field

[0001] This utility model belongs to the field of potentiometers, specifically relating to a thin rotary potentiometer. Background Technology

[0002] A potentiometer is a resistive element with three leads whose resistance can be adjusted according to a certain rule. In electronic circuits, it is often used as a variable resistor, voltage divider, etc. By adjusting its resistance value, the voltage, current and other parameters in the circuit can be changed to meet different circuit requirements.

[0003] In existing potentiometers, the positioning spring and brush are integrally formed and riveted to the rotating disk. In this method, the positioning spring must have the same spring force as the brush and cannot be adjusted independently. The positioning force is weak, which affects the user's functionality. When the positioning force is increased to meet the positioning clarity, the brush spring force also increases, which severely shortens the product's lifespan. Furthermore, the carbon sheet and terminal are not plastic-coated, which can easily cause poor contact during high-temperature soldering by the customer.

[0004] Therefore, existing potentiometers suffer from problems such as weak positioning force, uneven and unclear positioning torque, and poor contact due to high temperatures during soldering. Utility Model Content

[0005] To overcome the problems of weak positioning force, uneven and unclear positioning torque, and poor contact caused by high temperature during welding of existing potentiometers, a thin rotary potentiometer is proposed.

[0006] The technical solution of this utility model is as follows: a thin rotary potentiometer, including a rotary disk; it also includes a connecting post and a connecting plate. A marking strip is fixed to the upper end of the rotary disk. A limit groove is opened on the inner wall of the rotary disk. The rotary disk is rotatably mounted on the inner wall of the upper limit groove. A first connecting groove is opened at both the upper and lower ends of the rotary disk. A connecting post is arranged in the first connecting groove. A connecting plate is fixed to the outer wall of the connecting post. The connecting plate is located at the lower end of the rotary disk. A base is arranged at the lower end of the rotary disk. A protrusion for fixing the base is arranged on the rotary disk. A carbon sheet is arranged on the base. A brush for adjusting the resistance of the carbon sheet is arranged at the lower end of the connecting plate. Multiple contact terminals are arranged at the upper end of the base. The contact terminals are coated with plastic at the contact points with the base to form a protective film. The carbon sheet and the contact terminals are electrically connected to each other.

[0007] Preferably, an identification strip is fixed to the upper end of the rotating disk, a threaded groove is opened at the upper end of the connecting column, a stud is provided on the identification strip, and the stud is threaded onto the threaded groove after passing through the identification strip.

[0008] Preferably, the lower end of the rotating disk is fixedly connected to multiple first locking pins, and a positioning spring is fixedly connected to the rotating disk by multiple first locking pins in a snap-fit ​​manner. Multiple first locking slots are opened at the upper and lower ends of the positioning spring, and the first locking slots correspond one-to-one with the first locking pins. Two protruding blocks are fixedly connected to the lower end of the positioning spring.

[0009] Preferably, the lower end of the connecting plate is fixedly connected to multiple second locking posts, and the connecting plate is fixedly connected to the brush plate by multiple second locking posts in a snap-fit ​​manner. Multiple second locking slots are opened at the upper and lower ends of the brush plate, and the second locking slots and second locking posts correspond one to one. Multiple brushes are fixedly connected to the lower end of the brush plate, and the lower end of the brushes and the upper end of the carbon sheet are in contact with each other.

[0010] Preferably, the upper part of the base has two slots that fit into the protrusions and are connected by a snap-fit.

[0011] Preferably, the base and the carbon sheet have a second connecting groove on their structure, and the inner wall of the second connecting groove and the outer wall of the connecting column fit together.

[0012] Preferably, the base has two stop plates fixed to its exterior, the outer wall of the connecting column has a groove, and the inner wall of the groove has a locking block that slides on it, with the upper end of the locking block fitting against the lower end of the base.

[0013] The beneficial effects of this utility model are as follows: by rotating the rotating disk, the independent individual brush and the positioning spring structure are driven to contact the brush and the carbon sheet, and the positioning spring contacts the base. The positioning spring has a double arm and double positioning and is balanced with the slot on the base to ensure stable contact between the carbon sheet and the brush. This can improve the problems of weak positioning force, uneven and unclear positioning torque and only being applicable to single-circuit products. Attached Figure Description

[0014] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;

[0015] Figure 2 The diagram shown is a cross-sectional perspective view of the present invention.

[0016] Figure 3 The diagram shown is a three-dimensional structural schematic of the rotating disk of this utility model;

[0017] Figure 4 The diagram shown is a three-dimensional structural schematic of the rotating disk and positioning spring of this utility model.

[0018] Figure 5 The diagram shows a three-dimensional structure of the connecting column and brush plate of this utility model.

[0019] Figure 6 The diagram shown is a three-dimensional structural schematic of the base of this utility model.

[0020] The markings in the attached diagram are as follows: 1. Rotating disk; 101. Identification strip; 102. Limiting groove; 2. Rotating disk; 201. First locking post; 202. Positioning spring; 203. First snap-fit ​​groove; 204. Protrusion; 205. First connecting groove; 3. Connecting post; 301. Sliding groove; 302. Locking block; 303. Connecting disk; 304. Second locking post; 305. Brush disk; 306. Second snap-fit ​​groove; 307. Brush; 308. Screw groove; 309. Screw; 4. Base; 401. Carbon sheet; 402. Locking groove; 403. Second connecting groove; 404. Stop plate; 405. Contact terminal; 406. Wrapping skin. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figures 1-6 This utility model provides an embodiment: a thin rotary potentiometer, including a rotary disk 1; it also includes a connecting post 3 and a connecting plate 303. A marking strip 101 is fixedly connected to the upper end of the rotary disk 1. A limit groove 102 is formed on the inner wall of the rotary disk 1. A rotary disk 2 is rotatably mounted on the inner wall of the limit groove 102 of the rotary disk 1. First connecting grooves 205 are formed at the upper and lower ends of the rotary disk 2. A connecting post 3 is disposed within the first connecting groove 205. A connecting plate 303 is fixedly connected to the outer wall of the connecting post 3. The connecting plate 303 is located at the lower end of the rotary disk 2. A base 4 is provided at the lower end of the rotary disk 1. A protrusion 204 for fixing the base 4 is provided on the rotary disk 2. A carbon sheet 401 is provided on the base 4. The lower end of the connecting plate 303 is provided with... A brush 307 is provided for adjusting the resistance of the carbon sheet 401. The upper end of the base 4 is provided with multiple contact terminals 405. The contact terminals 405 are coated with plastic to form a skin 406 at the contact points with the base 4. The carbon sheet 401 and the contact terminals 405 are electrically connected to each other. By rotating the rotating disk 1, the independent individual brush 307 and the positioning spring 202 structure are driven. The brush 307 contacts the carbon sheet 401, and the positioning spring 202 contacts the base 4. The positioning spring 202 is a double-arm double-positioning device that is balanced with the slot 402 on the base 4 to ensure stable contact between the carbon sheet 401 and the brush 307. This can improve the problems of weak positioning force, uneven and unclear positioning torque, and the fact that it can only be used for single-circuit products.

[0023] Please see Figures 2-5In this embodiment, a marker strip 101 is fixedly connected to the upper end of the rotating disk 1, and a threaded groove 308 is provided on the upper end of the connecting post 3. A stud 309 is provided on the marker strip 101. The stud 309 passes through the marker strip 101 and is threaded onto the threaded groove 308. After the potentiometer is assembled, the stud 309 is threaded onto the threaded groove 308 by passing through the sliding groove 301, thus achieving the fixation of the integrated structure. When the rotating disk 1 is rotated, it does not affect the rotating disk 2, thereby allowing the brush 307 to slide on the carbon sheet 401 to adjust the resistance. At the same time, the protrusion 204 is positioned in the slot 402 to limit the rotation, providing damping when the rotating disk 1 rotates. Multiple first locking posts 201 are fixedly connected to the lower end of the rotating disk 2. A positioning spring 202 is fixedly connected to a positioning spring 202 by multiple first locking posts 201. Multiple first locking slots 203 are provided at the upper and lower ends of the positioning spring 202, and the first locking slots 203 correspond one-to-one with the first locking posts 201. Two protruding blocks 204 are fixedly connected to the lower end of the positioning spring 202. Multiple second locking posts 304 are fixedly connected to the lower end of the connecting plate 303 by multiple second locking posts 304. A brush plate 305 is fixedly connected to the connecting plate 303 by multiple second locking posts 304. Multiple second locking slots 306 are provided at the upper and lower ends of the brush plate 305, and the second locking slots 306 correspond one-to-one with the second locking posts 304. Multiple brushes 307 are fixedly connected to the lower end of the brush plate 305, and the lower end of the brushes 307 is in contact with the upper end of the carbon sheet 401.

[0024] Please see Figure 2 and Figure 6 In this embodiment, the upper end of the base 4 has two slots 402. The slots 402 and the protrusions 204 are matched and connected by a snap-fit. The protrusions 204 on the positioning spring 202 are in contact with the base 4. The positioning spring 202 is double-armed and double-positioned, and is balanced with the slots 402 on the base 4 to ensure stable contact between the carbon sheet 401 and the brush 307. The structure formed by the base 4 and the carbon sheet 401 has a second connecting groove 403. The inner wall of the second connecting groove 403 and the outer wall of the connecting post 3 are in contact with each other. Two stop plates 404 are fixed to the outside of the base 4. The outer wall of the connecting post 3 has a sliding groove 301. The inner wall of the sliding groove 301 is slidably provided with a locking block 302. The upper end of the locking block 302 is in contact with the lower end of the base 4.

[0025] During assembly, the carbon sheet 401 and the base 4 are connected by a riveting structure. Then, multiple contact terminals 405 are installed on the base 4. A plastic-coating process is used to wrap the connection between the contact terminals 405 and the base 4 with a wrapping skin 406. The brush plate 305 is installed onto multiple second locking posts 304 via multiple second snap-fit ​​slots 306. The base 4 is fitted onto the lower end of the connecting plate 303. The outer wall of the connecting post 3 and the inner wall of the second connecting groove 403 are fitted together. Next, the locking block 302 is passed through the sliding groove 301 and placed at the lower end of the base 4. Then, the positioning spring 202 is snapped onto multiple first locking posts 201 via the first snap-fit ​​slot 203. The rotating disk 1 is fitted onto the upper end of the connecting post 3. The outer wall of the device is fitted to the inner wall of the first connecting groove 205. Then, the stud 309 is threaded into the screw groove 308 after passing through the marking strip 101. The protrusion 204 is aligned with the two slots 402 on the base 4 and pressed to fix it, thereby assembling the potentiometer. The device can be installed on the circuit board through the stop plate 404. At the same time, subsequent circuit connections can be made through the contact terminal 405. By forming a split structure between the positioning spring 202 and the brush plate 305, the brush 307 on the brush plate 305 can be adjusted individually, improving the service life. By using a plastic-coated structure at the connection between the contact terminal 405 and the base 4, the problem of poor contact caused by high temperature during subsequent customer soldering can be prevented.

Claims

1. A thin rotary potentiometer, comprising a rotating disk (1); characterized in that: It also includes a connecting column (3) and a connecting plate (303). A marking strip (101) is fixedly connected to the upper end of the rotating disk (1). A limit groove (102) is opened on the inner wall of the rotating disk (1). A rotating disk (2) is rotatably mounted on the inner wall of the upper limit groove (102) of the rotating disk (1). First connecting grooves (205) are opened at both the upper and lower ends of the rotating disk (2). A connecting column (3) is installed in the first connecting groove (205). A connecting plate (303) is fixedly connected to the outer wall of the connecting column (3). The connecting plate (303) is located at the lower end of the rotating disk (2). 1) The lower end is provided with a base (4), the rotating disk (2) is provided with a protrusion (204) for fixing the base (4), the base (4) is provided with a carbon sheet (401), the lower end of the connecting disk (303) is provided with a brush (307) for adjusting the resistance of the carbon sheet (401), the upper end of the base (4) is provided with multiple contact terminals (405), the contact terminals (405) are coated with plastic through the contact with the base (4) to form a wrapping skin (406), and the carbon sheet (401) and the contact terminals (405) are electrically connected to each other.

2. A thin rotary potentiometer according to claim 1, characterized in that: A label strip (101) is fixed to the upper end of the rotating disk (1), and a threaded groove (308) is opened at the upper end of the connecting column (3). A stud (309) is provided on the label strip (101), and the stud (309) is threaded onto the threaded groove (308) after passing through the label strip (101).

3. A thin rotary potentiometer according to claim 1, characterized in that: The lower end of the rotating disk (2) is fixed with multiple first locking pins (201). A positioning spring piece (202) is fixed to the rotating disk (2) by multiple first locking pins (201). Multiple first locking slots (203) are opened at the upper and lower ends of the positioning spring piece (202). The first locking slots (203) and the first locking pins (201) correspond one-to-one. Two protruding blocks (204) are fixed to the lower end of the positioning spring piece (202).

4. A thin rotary potentiometer according to claim 1, characterized in that: Multiple second locking pins (304) are fixedly connected to the lower end of the connecting plate (303). A brush plate (305) is fixedly connected to the connecting plate (303) by multiple second locking pins (304). Multiple second locking slots (306) are opened at the upper and lower ends of the brush plate (305). The second locking slots (306) correspond one-to-one with the second locking pins (304). Multiple brushes (307) are fixedly connected to the lower end of the brush plate (305). The lower end of the brushes (307) and the upper end of the carbon sheet (401) are in contact with each other.

5. A thin rotary potentiometer according to claim 1, characterized in that: The upper end of the base (4) has two slots (402), which are compatible with the protrusion (204) and are connected by a snap-fit.

6. A thin rotary potentiometer according to claim 1, characterized in that: The base (4) and the carbon sheet (401) have a second connecting groove (403) on their structure, and the inner wall of the second connecting groove (403) and the outer wall of the connecting column (3) are in contact with each other.

7. A thin rotary potentiometer according to claim 1, characterized in that: The base (4) has two stop plates (404) fixed to its exterior. The outer wall of the connecting column (3) is provided with a sliding groove (301). The inner wall of the sliding groove (301) is slidably provided with a locking block (302). The upper end of the locking block (302) is attached to the lower end of the base (4).

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