Trimming potentiometer with good contact effect

Abstract

The utility model discloses a fine-tuning potentiometer with a good contact effect, which comprises an insulating shell, a ceramic substrate is arranged in the insulating shell, an arc-shaped resistor disc is arranged at the top of the ceramic substrate, a rotating shaft is arranged on the insulating shell, a reed is arranged at the inner end part of the rotating shaft, and the reed is arranged on the insulating shell. The reed is provided with a reed contact which elastically deforms and is tightly attached to the resistor disc, the reed is always in contact with a conductive contact block of the conductive silver layer in the rotating process of the rotating shaft, and the outer part of the insulating shell is provided with a shell for pressing down the top of the rotating shaft. Certain abutting force exists between the reed contact and the resistor disc, so that a good contact effect is achieved between the reed contact and the resistor disc, the rotating shaft can rotate only when a certain external acting force is applied to the reed contact and the resistor disc, and voltage fluctuation caused by accidental rotation of the rotating shaft in a vibration environment is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a potentiometer relevant technical field, specifically is a fine adjustment potentiometer with good contact effect. BACKGROUND

[0002] Potentiometer is with three outgoing ends, resistance value can adjust according to certain variation law resistance element. Potentiometer usually is composed of resistance body and movable brush. Its main function is to adjust the size of voltage and current. Working principle is through manual adjustment rotating shaft or slide handle, changes the position of movable contact on resistance body, then changes the resistance value between movable contact and any fixed end, thereby changes the size of voltage and current. But in the existing potentiometer in the environment of vibration, rotating shaft accidental rotation, and voltage fluctuation appears. SUMMARY

[0003] To solve the defects of the prior art in the existing potentiometer in the environment of vibration, rotating shaft accidental rotation, and voltage fluctuation appears, the utility model provides a fine adjustment potentiometer with good contact effect.

[0004] In order to solve the above technical problem, the utility model provides the following technical scheme:

[0005] The utility model discloses a fine adjustment potentiometer with good contact effect, including insulating shell, the inside of insulating shell is equipped with ceramic substrate, is equipped with the third wiring pin, first wiring pin and second wiring pin of the insulating shell extension on ceramic substrate, the top of ceramic substrate is equipped with the arc resistance sheet, and one end of resistance sheet is connected with the third wiring pin, the other end of resistance sheet is connected with the first wiring pin, the insulating shell is installed with rotating shaft, the inner end of rotating shaft is installed with reed, is equipped with the spring piece contact of the spring piece that is tightly combined with the elastic deformation of resistance sheet, is equipped with the conductive silver layer of the second wiring pin connection on ceramic substrate, the spring piece is always in contact with the conductive contact block of conductive silver layer in the rotating process of rotating shaft, the outside of insulating shell is equipped with the shell for the top of rotating shaft is pressed down.

[0006] As a preferred technical scheme of the utility model, the inner end of rotating shaft is equipped with the connecting shaft of the diameter less than rotating shaft, is equipped with the indicating block for indicating the position of spring piece contact on connecting shaft, is equipped with the through -hole of the shell for the connecting shaft passes through, and the shaft end of connecting shaft is equipped with cross slot.

[0007] As a preferred technical scheme of the utility model, the shell and the top of rotating shaft are equipped with sealing rubber ring.

[0008] As a preferred technical scheme of the utility model, the reed is equipped with two positioning holes, and the bottom of rotating shaft is equipped with the positioning column inserted into the positioning hole.

[0009] As a preferred technical scheme of the utility model, a plurality of clamping blocks are arranged on the reed, and a receiving groove for receiving the reed and the clamping blocks is arranged at the bottom of the rotating shaft.

[0010] As a preferred technical scheme of the utility model, a contact convex point for contacting the resistance sheet is arranged on the lower bottom surface of the reed contact.

[0011] As a preferred technical scheme of the utility model, the shell is clamped with the insulating shell.

[0012] The utility model has the advantages of:

[0013] 1. The fine adjustment potentiometer with good contact effect, wherein the reed is arranged at the inner end of the rotating shaft, the reed contact which is elastically deformed and closely combined with the resistance sheet is arranged on the reed, and the reed contact moves along the resistance sheet during the rotation of the rotating shaft, so that the voltage is adjusted, the shell for pressing down the top of the rotating shaft is arranged outside the insulating shell, so that the reed contact and the resistance sheet have a certain resistance, so that the reed contact and the resistance sheet have good contact effect, and only when the rotating shaft is subjected to a certain external force, the rotating shaft rotates, so that the rotating shaft does not rotate accidentally in the vibrating environment, and voltage fluctuation is avoided. DRAWINGS

[0014] The drawings are used to provide further understanding of the utility model, constitute a part of the specification, are used together with the embodiments of the utility model to explain the utility model, and do not constitute the limitation of the utility model. In the drawings:

[0015] Figure 1 It is a structure schematic view of the fine adjustment potentiometer with good contact effect of the utility model;

[0016] Figure 2 It is a structure schematic view of the sealing rubber ring of the fine adjustment potentiometer with good contact effect of the utility model;

[0017] Figure 3 It is a structure schematic view of the reed of the fine adjustment potentiometer with good contact effect of the utility model;

[0018] Figure 4 It is a reed mounting structure schematic view of the fine adjustment potentiometer with good contact effect of the utility model;

[0019] Figure 5 It is a mounting structure schematic view of the resistance sheet of the fine adjustment potentiometer with good contact effect of the utility model.

[0020] In the diagram: 1. Insulating shell; 2. Ceramic substrate; 3. Third wiring pin; 4. First wiring pin; 5. Second wiring pin; 6. Resistor; 7. Shaft; 8. Spring; 9. Spring contact; 10. Conductive silver layer; 11. Conductive contact block; 12. Connecting shaft; 13. Indicator block; 14. Outer shell; 15. Sealing rubber ring; 16. Positioning hole; 17. Positioning post; 18. Locking block; 19. Storage groove; 20. Contact protrusion. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Example: Figures 1 to 5 As shown, this utility model discloses a fine-tuning potentiometer with good contact effect, comprising an insulating housing 1, a ceramic substrate 2 inside the insulating housing 1, a third connection pin 3, a first connection pin 4, and a second connection pin 5 extending from the insulating housing 1 on the ceramic substrate 2, an arc-shaped resistive piece 6 on the top of the ceramic substrate 2, one end of the resistive piece 6 being connected to the third connection pin 3, and the other end of the resistive piece 6 being connected to the first connection pin 4, a rotating shaft 7 being mounted on the insulating housing 1, a spring 8 being mounted on the inner end of the rotating shaft 7, a spring contact 9 on the spring 8 having elastic deformation and being tightly fitted with the resistive piece 6, a conductive silver layer 10 connected to the second connection pin 5 on the ceramic substrate 2, a conductive contact block 11 of the spring 8 always in contact with the conductive silver layer 10 during the rotation of the rotating shaft 7, and an outer shell 14 for pressing down the top of the rotating shaft 7 on the outside of the insulating housing 1. A spring 8 is installed at the inner end of the rotating shaft 7. The spring 8 has elastically deformable spring contacts 9 that fit tightly against the resistor sheet 6. During the rotation of the rotating shaft 7, the spring contacts 9 move along the resistor sheet 6, thereby regulating the voltage. The outer shell 14 of the insulating shell 1 is provided to press down on the top of the rotating shaft 7. This creates a certain amount of resistance between the spring contacts 9 and the resistor sheet 6, resulting in a good contact effect. The rotating shaft 7 will only rotate when subjected to a certain external force, thus preventing the rotating shaft 7 from rotating unexpectedly in a vibrating environment and causing voltage fluctuations.

[0023] The inner end of the rotating shaft 7 is provided with a connecting shaft 12 with a diameter smaller than that of the rotating shaft 7. The connecting shaft 12 is provided with an indicator block 13 for indicating the position of the reed contact 9. The outer casing 14 is provided with a through hole for the connecting shaft 12 to pass through, and the shaft end of the connecting shaft 12 is provided with a cross groove. This facilitates adjustment and makes it easy to accurately know the contact position of the reed contact 9, thus facilitating adjustment.

[0024] The outer shell 14 is provided with a sealing rubber ring 15 between the outer shell 14 and the top of the rotating shaft 7, so as to seal and make the whole have a better sealing effect.

[0025] The spring sheet 8 is provided with two positioning holes 16, and the bottom of the rotating shaft 7 is provided with a positioning column 17 inserted into the positioning hole 16, so as to limit the spring sheet 8 through cooperation of the two sets of positioning holes 16 and the positioning column.

[0026] The spring sheet 8 is provided with a plurality of clamping blocks 18, and the bottom of the rotating shaft 7 is provided with a receiving groove 19 for receiving the spring sheet 8 and the clamping block 18, so as to avoid rotation.

[0027] The lower bottom surface of the spring sheet contact 9 is provided with a contact bump 20 in contact with the resistance sheet 6, so that the spring sheet contact and the resistance sheet have a certain resistance force, so that the spring sheet contact and the resistance sheet have a better contact effect.

[0028] The spring sheet contact 9 and the resistance sheet 6 are arranged in an inclined manner, and the outer shell 14 is pressed, so that the spring sheet contact 9 and the resistance sheet 6 have a certain resistance force, so that the spring sheet contact 9 and the resistance sheet 6 have a better contact effect. Only when a certain external force is applied, the rotating shaft 7 will rotate. The outer shell 14 is clamped with the insulating shell 1, which is convenient for assembly.

[0029] In operation, the micro-adjusting potentiometer with good contact effect is provided with the spring sheet 8 installed at the inner end of the rotating shaft 7, the spring sheet 8 is provided with the spring sheet contact 9 which is elastically deformed and closely attached to the resistance sheet 6, the spring sheet contact 9 moves along the resistance sheet 6 during rotation of the rotating shaft 7, so as to adjust the voltage, the outer part of the insulating shell 1 is provided with the outer shell 14 for pressing the top of the rotating shaft 7, so that the spring sheet contact 9 and the resistance sheet 6 have a certain resistance force, so that the spring sheet contact 9 and the resistance sheet 6 have a better contact effect. Only when a certain external force is applied, the rotating shaft 7 will rotate. Thus, in a vibrating environment, the rotating shaft 7 will not rotate accidentally, and voltage fluctuation will not occur.

[0030] Finally, it should be noted that: the above only for preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A fine adjustment potentiometer with good contact effect, characterized in that, The utility model provides an insulating shell (1) is included, the inside of insulating shell (1) is equipped with ceramic substrate (2), be equipped with third wiring pin (3), first wiring pin (4) and second wiring pin (5) from insulating shell (1) on ceramic substrate (2), the top of ceramic substrate (2) is equipped with arc resistance sheet (6), and one end of resistance sheet (6) is connected with third wiring pin (3), the other end of resistance sheet (6) is connected with first wiring pin (4), the insulating shell (1) is installed with rotating shaft (7), the inner end portion of rotating shaft (7) is installed with reed (8), be equipped with spring deformation and with resistance sheet (6) closely adhere reed contact (9) of spring, ceramic substrate (2) is equipped with with second wiring pin (5) is connected with conductive silver layer (10), reed (8) always contact the conductive contact block (11) of conductive silver layer (10) in the rotating process of rotating shaft (7), the outside of insulating shell (1) is equipped with the shell (14) for the top of rotating shaft (7) is pressed down.

2. The fine adjustment potentiometer with good contact effect according to claim 1, characterized in that, The inner end portion of rotating shaft (7) is equipped with the connecting shaft (12) of smaller diameter than rotating shaft (7), the connecting shaft (12) is equipped with the indicating block (13) for indicating the position of reed contact (9), the shell (14) is equipped with the through hole for the connecting shaft (12) to pass through, and the shaft end of connecting shaft (12) is equipped with cross slot.

3. The fine adjustment potentiometer with good contact effect according to claim 1, characterized in that, The top between shell (14) and rotating shaft (7) is equipped with sealing rubber ring (15).

4. The fine adjustment potentiometer with good contact effect according to claim 1, characterized in that, Two positioning holes (16) are equipped on reed (8), and the bottom of rotating shaft (7) is equipped with positioning column (17) inserted into positioning hole (16).

5. The fine adjustment potentiometer with good contact effect according to claim 1, characterized in that, A plurality of clamping blocks (18) are equipped on reed (8), and the bottom of rotating shaft (7) is equipped with storage groove (19) for storing reed (8) and clamping block (18).

6. The fine adjustment potentiometer with good contact effect according to claim 1, characterized in that, The lower bottom surface of reed contact (9) is equipped with contact bump (20) in contact with resistance sheet (6).

7. The fine adjustment potentiometer with good contact effect according to claim 1, characterized in that, The shell (14) is clamped with the insulating shell (1).

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