Rotary adjustable resistor

Abstract

The utility model relates to a rotary adjustable resistor, which comprises a disc seat and a variable resistance slip ring formed by a resistance wire wound on a framework in the circumferential direction, the variable resistance slip ring is of an open-loop structure, a wiring pin 1 and a wiring pin 2 are respectively arranged on two sides of an opening of the variable resistance slip ring, and a central column is further arranged in the center of the disc seat. The center column is sleeved with a pointer and a wiring pin 3, the inner end of the pointer is in electrical contact with the wiring pin 3, the outer end of the pointer is in electrical contact with the variable resistance slip ring, the circumferential contact position of the pointer and the variable resistance slip ring is changed through rotation of the pointer, and therefore the resistance value of the resistor is adjusted. The rotary adjustable resistor structure is convenient to operate.

Description

Technical Field

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

[0002] When adjusting the existing sliding rheostat, the sliding contact piece needs to be slid back and forth in a straight line between the leftmost end and the rightmost end, and the operation distance is relatively long. Utility Model Content

[0003] Purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a rotatable adjustable resistor and a rotatable adjustable resistor structure, which is easy to operate.

[0004] The technical solution of the utility model is as follows: a rotary adjustable resistor comprises a disc seat, a variable resistance slip ring composed of a resistance wire wound on the circumference of a skeleton, the variable resistance slip ring is an open-loop structure, and a connection pin 1 and a connection pin 2 are respectively arranged on both sides of the opening of the variable resistance slip ring, and a central column is also arranged at the center of the disc seat, and a pointer and a connection pin 3 are arranged on the outer sleeve of the central column, the inner end of the pointer electrically contacts the connection pin 3, and the outer end of the pointer electrically contacts the variable resistance slip ring, and the circumferential contact position with the variable resistance slip ring is changed by the rotation of the pointer, thereby realizing the adjustment of the resistance value of the resistor.

[0005] By adopting the above technical solution and using rotary manual operation, the resistance value can be adjusted as required.

[0006] Connect the wires between pin 1 and pin 2 to get the total resistance value;

[0007] If you need to adjust the resistance value, connect the connection pins 1 and 3, or connect the connection pins 2 and 3, and then turn the pointer. The inner end of the pointer is always in electrical contact with the connection pin 3, while the outer end of the pointer changes the circumferential contact position with the variable resistance slip ring, thereby adjusting the resistance value. The needle pointer is more convenient and faster to operate.

[0008] Preferably, the center column is rotatably arranged on the disc seat, the inner end of the pointer is fixedly sleeved on the upper end of the center column, and the connection pin 3 is fixed on the disc seat and rotatably cooperates with the center column.

[0009] Preferably, the inner end of the pointer corresponds to the top of the connection pin 3, the outer end of the pointer corresponds to the top of the variable resistance slip ring, and the pointer is also pressed downward by the elastic pressure core.

[0010] Preferably, the resilient core includes a core body and a spring. The core body has a core column and a pressing head located at the upper end of the core column. The core column is detachably connected to the central column. The lower end of the core column passes through the central hole at the inner end of the pointer and realizes circumferential linkage through the cooperation of an axial limiting groove and a limiting block. The spring is sleeved outside the upper part of the core column and abuts between the pressing head and the upper surface of the inner end of the pointer. The core column is connected and fixed to the central column by passing downward through the central hole, and the pointer is circumferentially positioned on the core column. By arranging the spring between the pressing head and the upper surface of the inner end of the pointer, the inner end of the pointer is pressed downward against the terminal 3, and the outer end of the pointer is pressed downward against the variable resistance slip ring.

[0011] Preferably, the inner end of the pointer is also bent downward to form a spring piece, and the spring piece contacts the terminal 3 for conduction. The spring piece also elastically abuts and contacts the terminal.

[0012] Preferably, a carbon brush for contacting and conducting electricity with the variable resistance slip ring is provided at the outer end of the pointer.

[0013] Preferably, the lower end of the central column also extends out of the disc seat, and a screw cap is also installed on the lower end of the central column. By operating the screw cap to drive the central column to rotate, the pointer rotation adjustment function is achieved. The screw cap has a large operating area and is more convenient to operate.

[0014] Preferably, insulating layers are also coated on the inner and outer peripheral surfaces of the variable resistance slip ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a structural diagram of a specific embodiment of the present invention;

[0016] Figure 2 is an exploded view of a specific embodiment of the present invention;

[0017] Figure 3 is a connection structural diagram of the pointer and the terminal 3 in a specific embodiment of the present invention;

[0018] Figure 4 is a pointer structural diagram of a specific embodiment of the present invention.

[0019] In the figure: disc seat 1, variable resistance slip ring 2, opening 21, terminal 1A, terminal 2B, central column 3, pointer 4, inner end 41, spring piece 4a, central hole 411, outer end 42, terminal 3C, resilient core 5, core body 51, core column 511, pressing head 512, spring 52, limiting groove 61, limiting block 62, carbon brush 7, screw cap 8. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the scope of protection of the present invention.

[0021] As Figures 1-4 shown, a rotary adjustable resistor of the present invention includes a ceramic disc seat 1 and a variable resistance slip ring 2 composed of a resistance wire wound around the circumference of a skeleton. Since the skeleton is an open-loop structure, the variable resistance slip ring 2 composed of the resistance wire wound around the circumference of the skeleton is also an open-loop structure. On both sides of the opening 21 of the variable resistance slip ring 2, there are respectively provided a connection terminal 1A and a connection terminal 2B. The connection terminals are copper terminals. A central column 3 is further provided at the center of the disc seat 1. A pointer 4 and a connection terminal 3C are sleeved outside the central column 3. The inner end 41 of the pointer 4 is in electrical contact with the connection terminal 3C. A brush 7 is provided on the outer end 42 of the pointer, and the brush 7 contacts the variable resistance slip ring 2. By rotating the pointer 4, the circumferential contact position with the variable resistance slip ring 2 is changed, thereby realizing the adjustment of the resistance value.

[0022] Specifically, the central column 3 is rotatably arranged on the disc seat 1 and is in bearing cooperation therebetween. The inner end 41 of the pointer 4 is fixedly sleeved on the upper end of the central column 3. The connection terminal 3C is fixed on the disc seat 1 and is in rotational cooperation with the central column 3. The outer end of the connection terminal 3 extends to the opening of the variable resistance slip ring 2. The lower end of the central column 3 also extends out of the disc seat 1, and a rotary cap 8 is further installed on the lower end of the central column 3. The surface of the rotary cap 8 is polygonal or provided with a number of convex points, which is convenient for hand-held rotation operation.

[0023] Specifically, the inner end 41 of the pointer corresponds to above the connection terminal 3C, the outer end 42 of the pointer corresponds to above the variable resistance slip ring 2, and the pointer 4 is also pressed downward by a spring-loaded core 5. The spring-loaded core 5 includes a core body 51 and a spring 52. The core body 51 has a core column 511 and a pressing head 512 integrally located at the upper end of the core column 511. The core column 511 is connected to the central column 3 by screws or directly screwed on, so as to form a detachable connection. The lower end of the core column 511 passes through the central hole 411 of the inner end 41 of the pointer and realizes circumferential linkage through the cooperation of an axial limiting groove 61 and a limiting block 62. The limiting block is integrally arranged on the outer circumference of the core column 511, and the limiting groove 61 is arranged on the inner wall of the central hole, or the limiting block is integrally arranged on the inner wall of the central hole, and the limiting groove 61 is arranged on the outer circumference of the core column 511. The spring 52 is sleeved outside the upper part of the core column 511 and is pressed between the pressing head 512 and the upper surface of the inner end 41 of the pointer.

[0024] Specifically, the inner end 41 of the pointer is further bent downward to form an elastic sheet 4a, which is in contact with the connection pin 3C for electrical conduction. The pointer is provided with the elastic sheet 4a on both sides of the core column.

[0025] Specifically, an insulating layer is coated on the inner and outer peripheral surfaces of the variable resistance slip ring 2 .

[0026] The resistor of the utility model adopts a rotary manual operation, and the resistance value can be adjusted according to demand.

[0027] During installation, the variable resistance slip ring 2 is arranged outside the disc seat 1, and the center column 3 is installed in the center of the disc seat 1. Then, the terminal pin 3C and the pointer 4 are sequentially sleeved on the upper end of the center column 3, and then the spring-pressing core 5 is installed. First, the spring 52 is penetrated through the lower end of the core column 511 of the core body 51 and the center hole 411 at the inner end of the pointer 4. During installation, the circumferential linkage of the pointer 4 and the core body 51 is realized through the axial limit groove 61 and the limit block 62. Then, the core column 511 and the center column 3 are fixed with screws, and the spring 52 is pressed between the pressure head 512 and the upper surface of the inner end 41 of the pointer 4, so that the inner end 41 of the pointer 4 is pressed downward on the terminal pin 3C, and the outer end 42 of the pointer 4 is pressed downward on the variable resistance slip ring 2; the screw cap 8 is installed on the lower end of the center column 3.

[0028] How to use the resistor: Connect the wires at pins 1 and 2 for the total resistance.

[0029] If you need to adjust the resistance value, connect the connection pins 1 and 3, or connect the connection pins 2 and 3, and then turn the pointer. The inner end of the pointer is always in electrical contact with the connection pin 3, while the outer end of the pointer changes the circumferential contact position with the variable resistance slip ring, thereby adjusting the resistance value. The needle pointer is more convenient and faster to operate.

[0030] It should be noted that in the description of the present invention, all directional indications (such as up, down, inside, outside...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, in the description of the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "couple", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A rotary adjustable resistor, characterized in that: It includes a disc base (1) and a variable-resistance slip ring (2) composed of resistance wires wound around the circumference of a skeleton. The variable-resistance slip ring (2) is of an open-loop structure. On both sides of the opening (21) of the variable-resistance slip ring (2), a terminal 1 (A) and a terminal 2 (B) are respectively provided. In the center of the disc base (1), a central column (3) is further provided. A pointer (4) and a terminal 3 (C) are sleeved outside the central column (3). The inner end (41) of the pointer (4) is in electrical contact with the terminal 3 (C), and the outer end (42) of the pointer (4) is in electrical contact with the variable-resistance slip ring (2). By rotating the pointer (4), the circumferential contact position with the variable-resistance slip ring (2) is changed, thereby realizing the adjustment of the resistance value.

2. The rotary adjustable resistor according to claim 1, wherein: The central column (3) is rotatably arranged on the disc base (1). The inner end (41) of the pointer (4) is fixedly sleeved on the upper end of the central column (3). The terminal 3 (C) is fixed on the disc base (1) and is in rotational cooperation with the central column (3).

3. A rotary adjustable resistor according to claim 1 or 2, characterized in that: The inner end (41) of the pointer corresponds to above the terminal 3 (C), the outer end (42) of the pointer corresponds to above the variable-resistance slip ring (2), and the pointer (4) is also pressed downward by a spring-loaded core (5).

4. The rotary adjustable resistor according to claim 3, wherein: The spring-loaded core (5) includes a core body (51) and a spring (52). The core body (51) has a core column (511) and a pressing head (512) located at the upper end of the core column (511). The core column (511) is detachably connected to the central column (3). The lower end of the core column (511) passes through the central hole (411) of the inner end of the pointer (4), and circumferential linkage is realized through the cooperation of an axial limiting groove (61) and a limiting block (62). The spring (52) is sleeved outside the upper part of the core column (511) and is pressed between the pressing head (512) and the upper surface of the inner end of the pointer (4).

5. A rotary adjustable resistor according to claim 3, characterized in that: The inner end (41) of the pointer is also bent downward to form a spring piece (4a), and the spring piece (4a) is in contact with the terminal 3 (C) for conduction.

6. A rotary adjustable resistor according to claim 1 or 2, characterized in that: A brush (7) for contacting and conducting electricity with the variable-resistance slip ring (2) is provided on the outer end (42) of the pointer.

7. A rotary adjustable resistor according to claim 1 or 2, characterized in that: The lower end of the central column (3) also extends out of the disc base (1), and a screw cap (8) is further installed on the lower end of the central column (3).

8. A rotary adjustable resistor according to claim 1 or 2, characterized in that: Insulating layers are also coated on the inner and outer circumferential surfaces of the variable-resistance slip ring (2).

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