An adjustable potentiometer

Abstract

This utility model belongs to the field of potentiometer technology, and in particular to an adjustable potentiometer, comprising a potentiometer body, an upper housing, a lower housing, and wiring pins. The upper housing is mounted on top of the lower housing, and a rotating shaft is rotatably connected to the top of the upper housing. The wiring pins are connected to the side of the lower housing. An annular groove is formed on the top of the upper housing and on the side of the rotating shaft. This adjustable potentiometer allows the rotating shaft to rotate by rotating a rotating rod, which in turn rotates an extension rod, causing a sliding block to slide within the annular groove. When the rotation reaches an appropriate position, the tightening threaded rod is rotated until its bottom end abuts against the bottom of the annular groove. This limits the position of the sliding block, thereby restricting the positions of the extension rod and the rotating shaft, preventing accidental rotation caused by the rotating shaft and improving the stability of the potentiometer.

Description

Technical Field

[0001] This utility model relates to the field of potentiometer technology, specifically to an adjustable potentiometer. Background Technology

[0002] A potentiometer is a resistive element with three leads whose resistance can be adjusted according to a certain rule. A potentiometer typically consists of a resistive element and a movable brush. When the brush moves along the resistive element, a resistance value or voltage is obtained at the output terminal that is related to the displacement. A potentiometer can be used as either a three-terminal or a two-terminal element. The latter can be considered a variable resistor; because its function in the circuit is to obtain an output voltage that is related to the input voltage, it is called a potentiometer. There are two common types of potentiometers: rotary potentiometers and sliding potentiometers.

[0003] In electrical experiments, rotary potentiometers are commonly used to control the current and voltage of a circuit. Currently available rotary potentiometers mainly consist of upper and lower housings, a rotating shaft, a resistive element, and terminals. The resistance value inside the potentiometer is changed by rotating the rotating shaft. However, the rotating shaft and housing are connected by rotation, making it difficult to precisely adjust the resistance value of the potentiometer in actual use. Furthermore, the rotational connection between the rotating shaft and the housing is not stable, which can easily lead to accidental contact during electrical experiments, causing the resistance value of the potentiometer to change and resulting in deviations in the experimental results. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an adjustable potentiometer that solves the problem of "unstable connection affecting the accuracy of experimental data".

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable potentiometer, comprising a potentiometer body, the potentiometer body including an upper housing, a lower housing, and wiring pins, the upper housing being mounted on top of the lower housing, a rotating shaft being rotatably inserted into the top of the upper housing, the wiring pins being inserted into the side of the lower housing, an annular groove being formed on the top of the upper housing and on the side of the rotating shaft, an extension rod being fixedly mounted on the side of the rotating shaft, a sliding block being fixedly mounted on the bottom of the extension rod, the sliding block being arc-shaped and slidably inserted into the inner side of the annular groove, a through groove being formed on the top of both the extension rod and the sliding block, a fastening threaded rod being threadedly inserted into the inner side of the through groove, the bottom end of the fastening threaded rod abutting against the bottom of the annular groove.

[0006] As a preferred embodiment of this utility model, a side groove is provided on the side of the rotating shaft, the extension rod is fixedly inserted and installed on the inner side of the side groove, and a rotating rod is fixedly installed on the top of the rotating shaft.

[0007] As a preferred embodiment of this utility model, the top end of the fastening threaded rod extends above the extension rod and is fixedly fitted with a fastening knob.

[0008] As a preferred embodiment of this utility model, an annular scale line is provided on the top of the upper housing and outside the annular groove, and a positioning block is fixedly installed at the bottom of the extension rod. The positioning block is located directly above the annular scale line, and the annular scale line is in contact with the bottom of the positioning block.

[0009] In a preferred embodiment of this invention, both the positioning block and the sliding block are made of rubber.

[0010] As a preferred embodiment of this utility model, the extension rods are multiple and symmetrically distributed on the side of the rotating shaft, and multiple sliding blocks are slidably inserted and installed on the inner side of the annular groove.

[0011] Compared with the prior art, the present invention provides an adjustable potentiometer, which has the following advantages:

[0012] 1. This adjustable potentiometer allows the rotating shaft to rotate by rotating the rotating rod, which in turn drives the extension rod to rotate, causing the sliding block to slide within the annular groove. When the slider reaches the appropriate position, the fastening threaded rod is rotated until its bottom end abuts against the bottom of the annular groove. This limits the position of the sliding block, thereby restricting the positions of the extension rod and the rotating shaft. This prevents accidental rotation caused by the rotating shaft and improves the stability of the potentiometer.

[0013] 2. This adjustable potentiometer, through the movement of the extension rod, drives the positioning block to move synchronously. The circular scale line at the bottom of the positioning block can provide a reference for the adjustment of the potentiometer's current or voltage, thereby improving the accuracy of potentiometer adjustment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0016] Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure at point B.

[0017] In the diagram: 1. Potentiometer body; 11. Upper housing; 12. Lower housing; 13. Wiring pin; 14. Rotating shaft; 15. Rotating rod; 2. Annular groove; 3. Annular scale line; 4. Side groove; 5. Extension rod; 51. Through groove; 52. Sliding block; 53. Positioning block; 6. Fastening threaded rod; 61. Fastening knob. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1

[0020] Please see Figure 1-3 In this embodiment: an adjustable potentiometer includes a potentiometer body 1, which includes an upper housing 11, a lower housing 12, and wiring pins 13. The upper housing 11 is mounted on top of the lower housing 12. A rotating shaft 14 is rotatably connected to the top of the upper housing 11. The wiring pins 13 are connected to the side of the lower housing 12. An annular groove 2 is formed on the top of the upper housing 11 and on the side of the rotating shaft 14. An extension rod 5 is fixedly mounted on the side of the rotating shaft 14. A sliding block 52 is fixedly mounted on the bottom of the extension rod 5. The sliding block 52 is arc-shaped and slidably connected to the inner side of the annular groove 2. The extension rod 5 and the sliding block 52... The top of each potentiometer has a through groove 51, and a fastening threaded rod 6 is threadedly installed inside the through groove 51. The bottom end of the fastening threaded rod 6 abuts against the bottom of the annular groove 2. The potentiometer is adjusted by rotating the rotating shaft 14, which in turn drives the extension rod 5 to rotate, thereby causing the sliding block 52 to slide in the annular groove 2. When it is rotated to the appropriate position, the fastening threaded rod 6 is rotated until the bottom end of the fastening threaded rod 6 abuts against the bottom of the inner side of the annular groove 2. This can limit the position of the sliding block 52, thereby limiting the position of the extension rod 5 and the rotating shaft 14. This can prevent rotation caused by accidental contact of the rotating shaft 14 and improve the stability of the potentiometer.

[0021] In a preferred embodiment, a side groove 4 is provided on the side of the rotating shaft 14, and an extension rod 5 is fixedly inserted into the inner side of the side groove 4. A rotating rod 15 is fixedly installed on the top of the rotating shaft 14. By rotating the rotating rod 15, the rotating shaft 14 can be driven to rotate, thereby improving the convenience of using the potentiometer.

[0022] In a preferred embodiment, the top of the fastening threaded rod 6 extends above the extension rod 5 and is fixedly mounted with a fastening knob 61. By rotating the fastening knob 61, the extension rod 5 is rotated, thereby achieving contact and separation between the bottom of the extension rod 5 and the inner side of the annular groove 2, improving the convenience of potentiometer adjustment.

[0023] Example 2

[0024] Please see Figure 1-3In this embodiment: an annular scale line 3 is provided on the top of the upper housing 11 and outside the annular groove 2. A positioning block 53 is fixedly installed on the bottom of the extension rod 5. The positioning block 53 is located directly above the annular scale line 3, and the annular scale line 3 and the bottom of the positioning block 53 are in contact with each other. The annular scale line 3 is engraved with the resistance, current or voltage value of the potentiometer. The movement of the extension rod 5 will drive the positioning block 53 to move synchronously. The annular scale line 3 at the bottom of the positioning block 53 can provide a reference for the adjustment of the current or voltage of the potentiometer, thereby improving the accuracy of the potentiometer adjustment.

[0025] As a preferred embodiment, both the positioning block 53 and the sliding block 52 are made of rubber. Compared with metal or plastic materials, the rubber positioning block 53 and the sliding block 52 have a higher surface friction coefficient, making the potentiometer more stable after adjustment.

[0026] In a preferred embodiment, there are multiple extension rods 5 symmetrically distributed on the side of the rotating shaft 14, and multiple sliding blocks 52 are slidably inserted into the inner side of the annular groove 2. The multiple extension rods 5 can improve the smoothness of the rotation of the rotating shaft 14 and the structural stability.

[0027] The working principle and usage process of this utility model are as follows: During use, the operator can rotate the rotating rod 15 to drive the rotating shaft 14 to rotate, which in turn drives the extension rod 5 to rotate, thereby causing the sliding block 52 to slide in the annular groove 2. After rotating to the appropriate position, the tightening threaded rod 6 is rotated until the bottom end of the tightening threaded rod 6 abuts against the bottom of the inner side of the annular groove 2. This can limit the position of the sliding block 52, thereby restricting the position of the extension rod 5 and the rotating shaft 14. This can prevent rotation caused by accidental contact of the rotating shaft 14 and improve the stability of the potentiometer. The movement of the extension rod 5 will drive the positioning block 53 to move synchronously. The annular scale line 3 at the bottom of the positioning block 53 can provide a reference for the adjustment of the current or voltage of the potentiometer, improving the accuracy of the potentiometer adjustment.

[0028] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An adjustable potentiometer, comprising a potentiometer body (1), the potentiometer body (1) comprising an upper housing (11), a lower housing (12), and wiring pins (13), the upper housing (11) being mounted on the top of the lower housing (12), a rotating shaft (14) being rotatably connected to the top of the upper housing (11), and the wiring pins (13) being connected to the side of the lower housing (12), characterized in that: An annular groove (2) is provided on the top of the upper housing (11) and on the side of the rotating shaft (14). An extension rod (5) is fixedly installed on the side of the rotating shaft (14). A sliding block (52) is fixedly installed at the bottom of the extension rod (5). The sliding block (52) is arc-shaped and is slidably inserted into the inner side of the annular groove (2). A through groove (51) is provided on the top of both the extension rod (5) and the sliding block (52). A fastening threaded rod (6) is threadedly inserted into the inner side of the through groove (51). The bottom end of the fastening threaded rod (6) abuts against the bottom of the annular groove (2).

2. An adjustable potentiometer according to claim 1, characterized in that: The rotating shaft (14) has a side groove (4) on its side, and the extension rod (5) is fixedly inserted into the inside of the side groove (4). The rotating shaft (14) has a rotating rod (15) fixedly installed on its top.

3. An adjustable potentiometer according to claim 1, characterized in that: The top end of the fastening threaded rod (6) extends above the extension rod (5) and is fixedly mounted with a fastening knob (61).

4. An adjustable potentiometer according to claim 1, characterized in that: An annular scale line (3) is provided on the top of the upper housing (11) and outside the annular groove (2). A positioning block (53) is fixedly installed on the bottom of the extension rod (5). The positioning block (53) is located directly above the annular scale line (3). The annular scale line (3) and the bottom of the positioning block (53) are in contact with each other.

5. An adjustable potentiometer according to claim 4, characterized in that: Both the positioning block (53) and the sliding block (52) are made of rubber.

6. An adjustable potentiometer according to claim 1, characterized in that: The extension rods (5) are multiple and symmetrically distributed on the side of the rotating shaft (14), and multiple sliding blocks (52) are slidably inserted into the inner side of the annular groove (2).

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