Rotary variable potentiometer

Abstract

The utility model discloses a rotary variable potentiometer which comprises a shell, a resistor disc is arranged in the shell, resistor terminals are fixedly mounted at two ends of the resistor disc, a rotating shaft is movably mounted in the shell, a connecting sleeve is movably sleeved on the surface of the rotating shaft, a sliding terminal is arranged on one side of the connecting sleeve, and the sliding terminal is fixedly connected with the rotating shaft. The sliding terminal and the resistor terminal are located on the outer side of the shell, the surface of the rotating shaft is movably sleeved with an installation sleeve, a sliding piece is installed on one side of the installation sleeve, one end of the sliding piece is attached to the upper end of the resistor piece, the surface of the rotating shaft is sleeved with a compression spring, and the lower end of the compression spring is connected with the installation sleeve. When the rotating shaft rotates, the mounting sleeve is driven to rotate, the mounting sleeve drives the sliding piece to rotate, a user can conveniently adjust, the mounting sleeve is extruded under the action of the compression spring, so that the sliding piece is tightly attached to the resistor disc, and the situation that a gap is generated between the sliding piece and the resistor disc, and the using effect is affected is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of variable potentiometers, in particular to a rotary variable potentiometer. Background Art

[0002] A potentiometer is an adjustable electronic component that consists of a resistor and a rotating or sliding system. A potentiometer is a variable resistor used for voltage division. One or two movable metal contacts are pressed tightly against the exposed resistor. The position of the contacts determines the resistance between any end of the resistor and the contacts. According to the relationship between the output and input voltage ratio and the rotation angle, it can be divided into linear potentiometers (linear relationship) and function potentiometers (curve relationship).

[0003] After searching, a rotary variable potentiometer with a publication number of CN205194453U is found, which can strengthen the contact strength between the terminal and the carbon sheet and also increase the contact area, so that the contact performance between the two is more stable, thereby achieving the purpose of improving poor contact. The rotary variable potentiometer includes a shell, a rubber transfer sheet, a carbon sheet, a bracket, a terminal, and a brush. The rubber transfer sheet, the carbon sheet, the bracket, and the terminal are sequentially installed and covered by the shell, and the bristles of the brush contact the carbon sheet. The terminal includes a positive terminal and a negative terminal, and each terminal is provided with two tube holes. The carbon sheet includes a positive contact part and a negative contact part, and each contact part is provided with a through hole corresponding to the tube hole, and the tube hole and the through hole are riveted together by rivets;

[0004] The resistor inside the existing variable potentiometer is fixed inside the shell, and the contact between the sliding piece and the resistor is easily affected by the instability between the sliding piece and the resistor, which affects the contact effect and the normal use of the user. It is also easy to be affected by the collision of external force, which affects the position of the sliding piece and affects the use. For this reason, we provide a rotary variable potentiometer. Utility Model Content

[0005] The purpose of the utility model is to provide a rotary variable potentiometer to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rotary variable potentiometer, comprising a shell, a resistor sheet is arranged inside the shell, resistor terminals are fixedly installed at both ends of the resistor sheet, a rotating shaft is movably installed inside the shell, a connecting sleeve is movably sleeved on the surface of the rotating shaft, a sliding terminal is arranged on one side of the connecting sleeve, the sliding terminal and the resistor terminal are located on the outside of the shell, a mounting sleeve is movably sleeved on the surface of the rotating shaft, a sliding sheet is installed on one side of the mounting sleeve, one end of the sliding sheet is fitted with the upper end of the resistor sheet, a clamping spring is sleeved on the surface of the rotating shaft, the lower end of the clamping spring is connected to the mounting sleeve, and a limiting structure is arranged on the upper end of the rotating shaft.

[0007] Preferably, an annular groove is provided at the upper end of the mounting sleeve, an annular rail is movably installed inside the annular groove, a rotating ring is fixedly installed at the upper end of the annular rail, and the lower end of the compression spring is fixedly connected to the rotating ring.

[0008] Preferably, the limiting structure comprises a mounting seat, the mounting seat is fixedly mounted on the upper end of the shell, and the upper end of the rotating shaft is movably inserted into the interior of the mounting seat.

[0009] Preferably, an adjusting sleeve is movably inserted into the upper end of the mounting seat, the adjusting sleeve is movably mounted on the upper end of the rotating shaft, and a rotating block is mounted on the upper end of the adjusting sleeve.

[0010] Preferably, a connecting rod is fixedly installed inside the adjustment sleeve, the lower end of the connecting rod is movably inserted into the interior of the rotating shaft, and a moving block is fixedly installed on this end, and a return spring connected to the moving block is sleeved on the surface of the connecting rod.

[0011] Preferably, a fixing gear ring is fixedly mounted on the lower end of the interior of the mounting seat, and a fixing gear engaged with the fixing gear ring is disposed on the lower end of the adjusting sleeve.

[0012] Preferably, connection grooves are provided on both sides of the rotating shaft surface, and the connection grooves are in the shape of long strips.

[0013] Preferably, a connecting block is fixedly installed inside the installation sleeve and the adjustment sleeve, and one end of the connecting block is movably inserted into the interior of the connecting groove.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. In the utility model, the moving block is supported by the return spring, and the moving block pulls the adjusting sleeve through the connecting rod, so that the fixed gear at the lower end of the adjusting sleeve is engaged with the fixed gear ring, so that the adjusting sleeve cannot rotate, and the rotating shaft is limited to prevent it from touching the rotating block, so that the sliding piece rotates and affects the use effect. When it is necessary to rotate the rotating shaft and the sliding piece, the user pulls the rotating block upward, and the rotating block drives the fixed gear to move upward through the adjusting sleeve and disengages from the fixed gear ring, so that the rotating shaft and the sliding piece can rotate, which is convenient for the user to adjust.

[0016] 2. In the utility model, when the shaft rotates, the mounting sleeve rotates, and the mounting sleeve drives the sliding piece to rotate, which is convenient for the user to adjust. Under the action of the compression spring, the mounting sleeve is squeezed, so that the sliding piece and the resistor piece fit closely, preventing a gap from being generated between the sliding piece and the resistor piece, which affects the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 For this utility model Figure 2 The enlarged structural diagram at A in the middle;

[0020] Figure 4 For this utility model Figure 2 The enlarged structural diagram at B in the middle;

[0021] In the figure: 1. housing; 2. sliding terminal; 3. resistor terminal; 4. resistor plate; 5. rotating shaft; 6. connecting sleeve; 7. sliding plate; 8. mounting seat; 9. rotating block; 10. connecting groove; 11. mounting sleeve; 12. connecting block; 13. clamping spring; 14. adjusting sleeve; 15. connecting rod; 16. moving block; 17. reset spring; 18. fixed gear; 19. fixed gear ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the technical solutions in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 to 3 The utility model provides a technical solution: a rotary variable potentiometer, comprising a shell 1, a resistor 4 is arranged inside the shell 1, resistor terminals 3 are fixedly installed at both ends of the resistor 4, a rotating shaft 5 is movably installed inside the shell 1, a connecting sleeve 6 is movably sleeved on the surface of the rotating shaft 5, a sliding terminal 2 is arranged on one side of the connecting sleeve 6, the sliding terminal 2 and the resistor terminal 3 are located on the outside of the shell 1, a mounting sleeve 11 is movably sleeved on the surface of the rotating shaft 5, a sliding sheet 7 is installed on one side of the mounting sleeve 11, one end of the sliding sheet 7 is fitted with the upper end of the resistor 4, a pressing spring 13 is sleeved on the surface of the rotating shaft 5, the lower end of the pressing spring 13 is connected to the mounting sleeve 11, an annular groove is provided at the upper end of the mounting sleeve 11, an annular rail is movably installed inside the annular groove, a rotating ring is fixedly installed on the upper end of the annular rail, and the lower end of the pressing spring 13 is fixedly connected to the rotating ring;

[0024] When the rotating shaft 5 rotates, the mounting sleeve 11 rotates, and the mounting sleeve 11 drives the sliding piece 7 to rotate, which is convenient for the user to adjust. Under the action of the compression spring 13, the mounting sleeve 11 is squeezed, so that the sliding piece 7 and the resistor piece 4 fit closely, preventing a gap from being generated between the sliding piece 7 and the resistor piece 4, which affects the use effect.

[0025] See also Figures 2 to 4 The utility model provides a technical solution: a rotary variable potentiometer, a limiting structure is arranged at the upper end of the rotating shaft 5, the limiting structure comprises a mounting seat 8, the mounting seat 8 is fixedly mounted on the upper end of the housing 1, the upper end of the rotating shaft 5 is movably inserted in the interior of the mounting seat 8, an adjusting sleeve 14 is movably inserted in the upper end of the mounting seat 8, the adjusting sleeve 14 is movably sleeved on the upper end of the rotating shaft 5, a rotating block 9 is mounted on the upper end of the adjusting sleeve 14, a connecting rod 15 is fixedly installed inside the adjusting sleeve 14, the lower end of the connecting rod 15 is movably inserted in the interior of the rotating shaft 5, and a moving block 16 is fixedly installed on the end, a reset spring 17 connected to the moving block 16 is sleeved on the surface of the connecting rod 15, a fixing gear ring 19 is fixedly installed at the lower end of the interior of the mounting seat 8, and a fixing gear 18 that is clamped with the fixing gear ring 19 is arranged at the lower end of the adjusting sleeve 14;

[0026] Among them, the moving block 16 is supported by the return spring 17, and the moving block 16 pulls the adjusting sleeve 14 through the connecting rod 15, so that the fixed gear 18 at the lower end of the adjusting sleeve 14 is engaged with the fixed gear ring 19, so that the adjusting sleeve 14 cannot rotate, so that the rotating shaft 5 is limited to prevent it from touching the rotating block 9, so that the sliding plate 7 rotates and affects the use effect. When it is necessary to rotate the rotating shaft 5 and the sliding plate 7, the user pulls the rotating block 9 upward, and the rotating block 9 drives the fixed gear 18 to move upward through the adjusting sleeve 14 and disengages from the fixed gear ring 19, so that the rotating shaft 5 and the sliding plate 7 can rotate, which is convenient for the user to adjust.

[0027] See also Figures 2 to 4 The utility model provides a technical solution: a rotary variable potentiometer, both sides of the surface of the rotating shaft 5 are provided with connecting grooves 10, the connecting grooves 10 are in the shape of long strips, the insides of the mounting sleeve 11 and the adjusting sleeve 14 are fixedly installed with connecting blocks, one end of the connecting block is movably inserted into the inside of the connecting groove 10;

[0028] Among them, under the action of the connecting block and the connecting groove 10, the installation sleeve 11 and the adjusting sleeve 14 can move axially along the rotating shaft 5. When the rotating shaft 5 rotates, the installation sleeve 11 and the adjusting sleeve 14 can be driven to rotate through the connecting block and the connecting groove 10.

[0029] Working principle: the moving block 16 is supported by the return spring 17, and the moving block 16 pulls the adjusting sleeve 14 through the connecting rod 15, so that the fixed gear 18 at the lower end of the adjusting sleeve 14 is engaged with the fixed gear ring 19, so that the adjusting sleeve 14 cannot rotate, so that the rotating shaft 5 is limited to prevent it from touching the rotating block 9, so that the sliding piece 7 rotates, affecting the use effect. When the rotating shaft 5 and the sliding piece 7 need to be rotated, the user pulls the rotating block 9 upward, and the rotating block 9 drives the fixed gear 18 to move upward through the adjusting sleeve 14 and disengages from the fixed gear ring 19, so that the rotating shaft 5 and the sliding piece 7 can rotate, which is convenient for the user to adjust. When the rotating shaft 5 rotates, the mounting sleeve 11 rotates, and the mounting sleeve 11 drives the sliding piece 7 to rotate, which is convenient for the user to adjust. The mounting sleeve 11 is squeezed under the action of the compression spring 13, so that the sliding piece 7 is closely fitted with the resistor 4, preventing a gap from being generated between the sliding piece 7 and the resistor 4, affecting the use effect.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary variable potentiometer, comprising a housing (1), characterized in that: A resistor sheet (4) is arranged inside the housing (1), and resistor terminals (3) are fixedly mounted at both ends of the resistor sheet (4). A rotating shaft (5) is movably mounted inside the housing (1), and a connecting sleeve (6) is movably sleeved on the surface of the rotating shaft (5), and a sliding terminal (2) is arranged on one side of the connecting sleeve (6). The sliding terminal (2) and the resistor terminal (3) are located outside the housing (1). A mounting sleeve (11) is movably sleeved on the surface of the rotating shaft (5), and a sliding sheet (7) is mounted on one side of the mounting sleeve (11). One end of the sliding sheet (7) is fitted with the upper end of the resistor sheet (4). A pressing spring (13) is sleeved on the surface of the rotating shaft (5), and the lower end of the pressing spring (13) is connected to the mounting sleeve (11). A limiting structure is arranged on the upper end of the rotating shaft (5).

2. A rotary variable potentiometer according to claim 1, characterized in that: An annular groove is provided at the upper end of the mounting sleeve (11), an annular rail is movably mounted inside the annular groove, a rotating ring is fixedly mounted at the upper end of the annular rail, and the lower end of the compression spring (13) is fixedly connected to the rotating ring.

3. A rotary variable potentiometer according to claim 1, characterized in that: The limiting structure comprises a mounting seat (8), wherein the mounting seat (8) is fixedly mounted on the upper end of the housing (1), and the upper end of the rotating shaft (5) is movably inserted into the interior of the mounting seat (8).

4. A rotary variable potentiometer according to claim 3, characterized in that: An adjustment sleeve (14) is movably inserted into the upper end of the mounting seat (8); the adjustment sleeve (14) is movably sleeved on the upper end of the rotating shaft (5); and a rotating block (9) is mounted on the upper end of the adjustment sleeve (14).

5. A rotary variable potentiometer according to claim 4, characterized in that: A connecting rod (15) is fixedly mounted inside the adjusting sleeve (14); the lower end of the connecting rod (15) is movably inserted into the interior of the rotating shaft (5), and a moving block (16) is fixedly mounted on the end; and a return spring (17) connected to the moving block (16) is sleeved on the surface of the connecting rod (15).

6. A rotary variable potentiometer according to claim 5, characterized in that: A locking gear ring (19) is fixedly mounted at the lower end of the interior of the mounting seat (8), and a locking gear (18) is provided at the lower end of the adjustment sleeve (14) for locking with the locking gear ring (19).

7. A rotary variable potentiometer according to claim 6, characterized in that: Connecting grooves (10) are provided on both sides of the surface of the rotating shaft (5), and the connecting grooves (10) are in the shape of long strips.

8. A rotary variable potentiometer according to claim 7, characterized in that: A connecting block is fixedly installed inside the installation sleeve (11) and the adjustment sleeve (14), and one end of the connecting block is movably inserted into the interior of the connecting groove (10).

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