Precise adjustable resistor device

Abstract

The utility model provides a precision adjustable resistor device, relates to resistor technical field, precision adjustable resistor device, including base, cover plate, resistor and positioning device, base and cover plate are welded together after being positioned by the positioning device, the resistor is installed in base, the positioning device includes cylinder seat, fixed column, elastic steel plate and limit piece, the fixed column is fixed in the cylinder seat, the elastic steel plate is fixed in the cylinder seat, and the limit piece is fixed in the cylinder seat. The cylinder base is fixedly installed on the face, facing the base, of the cover plate, the fixing column is fixedly installed in the cylinder base, the elastic steel plate penetrates through the fixing column, the limiting piece is fixedly installed on the elastic steel plate, a through hole is formed in the cylinder base, and when the elastic steel plate is in a non-compressed state, the limiting piece movably penetrates through the through hole, and a groove matched with the cylinder base is formed in the top of the base. A limiting groove is formed in the inner wall of the groove, before the cover plate and the base are welded, the cylinder base is aligned to the groove, when the limiting piece is extruded by the inner wall of the groove, the elastic steel plate is also extruded, and when the limiting piece reaches the limiting groove, the positioning effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of resistors, in particular to a precision adjustable resistor device. Background Art

[0002] The precision adjustable resistor device is also called a precision variable resistor device. The precision adjustable resistor device is a type of resistor. The resistance value of the precision adjustable resistor device can be adjusted manually. It mainly changes the resistance value by changing the length of the resistor connected to the circuit to meet the needs of the circuit. The precision adjustable resistor device is a precision adjustable resistor device with a small volume and a wide adjustment range, and is widely used in small electrical products;

[0003] The base and the cover plate of the existing precision adjustable resistor device are usually welded together. However, due to its small volume, when welding the traditional precision adjustable resistor device, it is difficult for the staff to hold the base and the cover plate, and the base and the cover plate are not easy to align, which increases the difficulty of the welding work.

[0004] Therefore, it is necessary to provide a new precision adjustable resistor device to solve the above technical problems. Content of the Utility Model

[0005] To solve the above technical problems, the utility model provides a precision adjustable resistor device.

[0006] The precision adjustable resistor device provided by the utility model includes a base, a cover plate, a resistor and a positioning device. The base and the cover plate are welded together after being positioned by the positioning device. The resistor is fixedly installed in the base, and the four positioning devices are respectively fixedly installed at the four top corners of the side of the cover plate facing the base;

[0007] The positioning device includes a cylinder base, a fixed column, a spring steel plate and a limiting member. The cylinder base is fixedly installed on the side of the cover plate facing the base. The fixed column is fixedly installed inside the cylinder base. The spring steel plate is in an inverted "V" shape downward. The spring steel plate passes through the fixed column and is fixedly connected to the fixed column. The limiting member is fixedly installed on the spring steel plate. A through hole is opened on the cylinder base. When the spring steel plate is in an uncompressed state, the limiting member movably passes through the through hole;

[0008] A groove adapted to the cylinder base is opened at the top of the base, and a limiting groove is opened on the inner wall of the groove.

[0009] Preferably, the main body of the limiting member is cylindrical, and the top is hemispherical.

[0010] Preferably, the limiting groove is a conical shape with an outward opening.

[0011] Preferably, a first curved leg is provided on one side of the base, and a second curved leg and a third curved leg are respectively provided on the side of the base away from the first curved leg.

[0012] Preferably, a rotating rod is provided at the center of the cover plate. A rubber cover is threadedly connected to the top of the rotating rod, and a rotating groove is provided at the top of the rubber cover.

[0013] Compared with the related art, the precision adjustable resistor device provided by the present invention has the following beneficial effects: In this precision adjustable resistor device, a positioning device is installed on the cover plate. Before welding the cover plate and the base, the barrel seat on the cover plate is aligned with the groove on the base. When the limiting member is squeezed by the inner wall of the groove, the elastic steel plate is also squeezed. When the limiting member reaches the limiting groove, the positioning effect is achieved. In this way, when the staff welds the cover plate and the base, it will not be caused by the small volume of the adjustable resistor that the base and the cover plate are not aligned, resulting in inconvenient operation during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the precision adjustable resistor device provided by the present invention;

[0015] Figure 2 is Figure 1 a schematic structural diagram of the precision adjustable resistor device shown before welding;

[0016] Figure 3 is Figure 2 a partial schematic diagram of the positioning device shown.

[0017] Reference numerals in the figures: 1, base; 2, cover plate; 3, first curved leg; 4, second curved leg; 5, third curved leg; 6, rubber cover; 7, rotating groove; 8, resistor; 9, rotating rod; 10, positioning device; 11, groove; 12, barrel seat; 13, fixed column; 14, elastic steel plate; 15, limiting member; 16, limiting groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present invention will be further described below in conjunction with the drawings and embodiments.

[0019] Please refer to Figures 1 - 3 , where Figure 1 is a schematic structural diagram of the precision adjustable resistor device provided by the present invention; Figure 2 is Figure 1 a schematic structural diagram of the precision adjustable resistor device shown before welding; Figure 3 is Figure 2 a partial schematic diagram of the positioning device shown.

[0020] In the specific implementation process, as Figures 1 - 3As shown in the figure, a precision adjustable resistor device includes: a base 1, a cover plate 2, a resistor 8, and a positioning device 10. After the base 1 and the cover plate 2 are positioned by the positioning device 10, they are welded together. The resistor 8 is fixedly installed inside the base 1, and the four positioning devices 10 are respectively fixedly installed at the four top corners of the side of the cover plate 2 facing the base 1;

[0021] The positioning device 10 includes a cylinder base 12, a fixing column 13, a spring steel plate 14, and a limiting member 15. The cylinder base 12 is fixedly installed on the side of the cover plate 2 facing the base 1, the fixing column 13 is fixedly installed inside the cylinder base 12. The spring steel plate 14 is in an inverted "V" shape facing downwards. The "V" shape makes the spring steel plate 14 more stable on the fixing column 13 during expansion and contraction. The spring steel plate 14 passes through the fixing column 13 and is fixedly connected to the fixing column 13. The limiting member 15 is fixedly installed on the spring steel plate 14. A through hole is provided on the cylinder base 12. When the spring steel plate 14 is in an uncompressed state, the limiting member 15 passes through the through hole movably. When the limiting member 15 is squeezed, it can drive the spring steel plate 14 to be compressed;

[0022] A groove 11 adapted to the cylinder base 12 is provided at the top of the base 1 to facilitate the cylinder base 12 to penetrate into the base 1. A limiting groove 16 is provided on the inner wall of the groove 11. When the limiting member 15 reaches the limiting groove 16, the spring steel plate 14 and the limiting member 15 are no longer squeezed and expand outwards. At this time, the cover plate 2 and the base 1 are closely attached to achieve the positioning effect;

[0023] The main body of the limiting member 15 is cylindrical, and the top is a hemisphere. When the limiting member 15 is squeezed by the inner wall of the groove 11, the top of the hemisphere is more convenient for expansion and contraction;

[0024] The limiting groove 16 is a conical shape with an outward opening. The conical shape with an outward opening makes it more convenient for the limiting member 15 to expand and contract in the limiting groove 16;

[0025] A first bent leg 3 is provided on one side of the base 1, and a second bent leg 4 and a third bent leg 5 are respectively provided on the side of the base 1 away from the first bent leg 3 to realize connection with the external circuit and facilitate the transmission of electrical signals;

[0026] A rotating rod 9 is provided at the center of the cover plate 2. A rubber cover 6 is threadedly connected to the top of the rotating rod 9. A rotating groove 7 is provided at the top of the rubber cover 6 to facilitate cooperation with a screwdriver to realize rotational adjustment and change the resistance value;

[0027] The working principle provided by the present utility model is as follows: In this precision adjustable resistor device, a positioning device 10 is installed on the cover plate 2. Before welding the cover plate 2 and the base 1, align the cylinder base 12 on the cover plate 2 with the groove 11 of the base 1, and at the same time place the cover plate 2 downward. At this time, when the limiting member 15 is squeezed by the inner wall of the groove 11, the elastic steel plate 14 is also squeezed, and the limiting member 15 contracts inward until the limiting member 15 reaches the limiting groove 16, and the elastic steel plate 14 and the limiting member 15 are no longer squeezed and expand and contract outward. At this time, the cover plate 2 and the base 1 are closely attached to achieve the positioning effect, and then the connection between the cover plate 2 and the base 1 is welded.

[0028] The circuits and controls involved in the present utility model are all prior arts and will not be elaborated herein.

[0029] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A precision adjustable resistor device, characterized in that: The invention comprises a base (1), a cover plate (2), a resistor (8) and a positioning device (10); the base (1) and the cover plate (2) are positioned by the positioning device (10) and then welded together; the resistor (8) is fixedly mounted in the base (1); and four positioning devices (10) are respectively fixedly mounted at four top corners of a side of the cover plate (2) facing the base (1); The positioning device (10) comprises a cartridge seat (12), a fixing column (13), an elastic steel plate (14) and a stopper (15); the cartridge seat (12) is fixedly mounted on a surface of the cover plate (2) facing the base (1); the fixing column (13) is fixedly mounted inside the cartridge seat (12); the elastic steel plate (14) is in a downwardly inverted "V" shape; the elastic steel plate (14) passes through the fixing column (13), and the elastic steel plate (14) is fixedly connected to the fixing column (13); the stopper (15) is fixedly mounted on the elastic steel plate (14); a through hole is provided on the cartridge seat (12); when the elastic steel plate (14) is in a non-compressed state, the stopper (15) moves through the through hole; The top of the base (1) is provided with a groove (11) adapted to the cylinder seat (12), and the inner wall of the groove (11) is provided with a limiting groove (16).

2. The precision adjustable resistor device according to claim 1, characterized in that: The limiting member (15) has a main body in the shape of a cylinder and a top in the shape of a hemisphere.

3. The precision adjustable resistor device according to claim 2, characterized in that: The limiting groove (16) is in the shape of a cone opening outwards.

4. The precision adjustable resistor device according to claim 3, characterized in that: A first curved foot (3) is provided on one side of the base (1), and a second curved foot (4) and a third curved foot (5) are respectively provided on a side of the base (1) away from the first curved foot (3).

5. The precision adjustable resistor device according to claim 4, characterized in that: A rotating rod (9) is arranged at the center of the cover plate (2), a rubber cover (6) is threadedly connected to the top of the rotating rod (9), and a rotating groove (7) is arranged at the top of the rubber cover (6).

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