Small-diameter multi-circle wire-wound potentiometer

Abstract

The utility model relates to the technical field of resistor elements, and discloses a small-diameter multi-turn wire-wound potentiometer, which solves the technical problems that the diameter and the volume of the multi-turn wire-wound potentiometer can be obviously reduced by forming a current terminal channel which does not need a traveling spring structure, but the heat dissipation space is reduced, and the heat dissipation of the potentiometer is inconvenient. Comprising a copper sleeve and a winding potentiometer body, a plurality of ventilation openings are formed in the surface of the copper sleeve, protective nets are arranged on the surfaces of the ventilation openings, a plurality of copper sheets are fixedly connected to the inner walls of the protective nets, a connecting ring is fixedly arranged at the top end of the copper sleeve, a supporting ring is fixedly arranged at the bottom end of the copper sleeve, and the winding potentiometer body is arranged in the copper sleeve; according to the utility model, the surface of the shell is provided with the heat dissipation ports, so that the circulation of air inside and outside the shell can be ensured, heat accumulation of the winding potentiometer main body can be prevented, and the copper sleeve and the copper sheet have good heat conduction capability, so that the temperature of the winding potentiometer main body can be reduced, and heat dissipation can be performed on the winding potentiometer main body.

Description

Technical Field

[0001] The utility model relates to the technical field of resistor elements, in particular to a small-diameter multi-turn wire-wound potentiometer. Background Art

[0002] Wirewound potentiometer is a kind of resistance element, which consists of a resistance wire coil wound on a skeleton, a sliding arm moving along the potentiometer and a brush on it. The skeleton cross section should be equal everywhere, and it is made of resistance wire with uniform material and cross section and equal pitch winding. Wirewound potentiometer has the advantages of high precision, good stability, small temperature coefficient, reliable contact, etc., and has strong power load capacity;

[0003] According to the "A small-diameter multi-turn wire-wound potentiometer based on a miniature screw transmission mechanism" provided by Chinese patent authorization announcement No. CN213877711U, by forming a current terminal channel that does not require a spring structure, the structure can be simplified, and the diameter and volume of the multi-turn wire-wound potentiometer can be significantly reduced, which is convenient for the dual needs of production and product miniaturization. However, after the diameter and volume are reduced, its internal structure becomes compact, which reduces the heat dissipation space. The potentiometer will generate heat when working for a long time and under overload conditions, which makes it inconvenient to dissipate the heat of the potentiometer, and the potentiometer is prone to heat accumulation and damage. Utility Model Content

[0004] The utility model provides a small-diameter multi-turn wire-wound potentiometer, which solves the technical problem that the diameter and volume of the multi-turn wire-wound potentiometer can be significantly reduced by forming a current terminal channel that does not require a spring structure, but the heat dissipation space is reduced, making it inconvenient to dissipate heat for the potentiometer.

[0005] In order to solve the above technical problems, the utility model provides a small-diameter multi-turn wire-wound potentiometer, comprising a copper sleeve and a winding potentiometer body, the surface of the copper sleeve is provided with a plurality of vents, the surfaces of the plurality of vents are provided with protective nets, the inner walls of the plurality of protective nets are fixedly connected with a plurality of copper sheets, the top of the copper sleeve is fixedly provided with a connecting ring, the bottom of the copper sleeve is fixedly provided with a supporting ring, the interior of the copper sleeve is provided with a winding potentiometer body, the surface of the winding potentiometer body is provided with an outer shell, the surface of the outer shell is provided with a plurality of heat dissipation ports, the top of the outer shell is provided with a positioning plate, the bottom end of the positioning plate is connected to the top end of the connecting ring, the winding potentiometer body is rotatably connected with a rotating shaft, and the top end of the rotating shaft is connected with a knob cap through a groove.

[0006] Preferably, the connecting ring is inserted and connected with the top of the outer shell, the inner ring of the supporting ring is provided with a rubber ring, and the supporting ring is snap-fitted and connected with the bottom of the outer shell through the rubber ring.

[0007] Preferably, the top end of the rotating shaft is snap-fitted with the inside of the knob cap, a groove is provided on one side of the top end of the rotating shaft, a convex strip is fixedly provided on the inner wall of the knob cap, the convex strip is snap-fitted with the groove, and a plug is provided at the bottom end of the convex strip.

[0008] Preferably, a rod groove and a terminal channel are respectively provided on the surface of the positioning plate, the rod groove is coaxial with the housing, and the rotating shaft is interlaced and connected with the rod groove.

[0009] Preferably, the top of the connecting ring is fixedly connected to the bottom end of the positioning plate by a plurality of connecting bolts, a plurality of through holes are opened on the surface of the positioning plate, a plurality of connecting bolts are respectively inserted and connected with the plurality of through holes, and a plurality of connecting bolts are all threadedly connected to the connecting ring.

[0010] Preferably, the surface of the knob cap is provided with anti-slip convex teeth, and the bottom end of the knob cap is fixedly connected with a baffle.

[0011] Compared with the related art, the beneficial effects of the utility model are:

[0012] The utility model provides a small-diameter multi-turn wire-wound potentiometer. By arranging a heat dissipation port on the surface of the shell, the circulation of air inside and outside the shell can be ensured, and the heat accumulation of the main body of the wire-wound potentiometer can be prevented. The copper sleeve and the copper sheet have good thermal conductivity, and can absorb the heat of the main body of the wire-wound potentiometer, and can reduce the temperature of the main body of the wire-wound potentiometer and dissipate heat for it. The vent can improve the ventilation capacity of the copper sleeve, increase the heat dissipation space, and enhance the heat dissipation effect of the main body of the wire-wound potentiometer. It is not easy to accumulate heat under long-term working and overload working conditions, and the main body of the wire-wound potentiometer is not easy to be damaged. While supporting the copper sheet through the protective net, the surface of the vent can be protected, and debris can be prevented from entering the copper sleeve through the vent.

[0013] By placing the copper sleeve on the surface of the shell and connecting the connecting ring and the positioning plate with connecting bolts, the copper sleeve can be easily installed. The support ring can support the bottom of the shell and the copper sleeve. The support ring can improve the fit and stability between the support ring and the shell through the rubber ring. The copper sleeve is not easy to shake. The knob cap is engaged with the rotating shaft through the convex strips and grooves, which makes it easy to quickly install the knob cap. The knob cap can transmit rotational force through the convex strips. By loosening the connecting bolts, the copper sleeve can be quickly removed. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the positioning plate of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the support ring of the utility model.

[0018] Numbers in the figure: 1. Copper sleeve; 2. Ventilation port; 3. Protective net; 4. Copper sheet; 5. Connecting ring; 6. Support ring; 7. Connecting bolt; 8. Rubber ring; 9. Winding potentiometer body; 10. Housing; 11. Heat dissipation port; 12. Positioning plate; 13. Rod groove; 14. Terminal channel; 15. Shaft; 16. Groove; 17. Knob cap; 18. Raised strip; 19. Plug; 20. Baffle; 21. Through hole. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-4 A small-diameter multi-turn wire-wound potentiometer comprises a copper sleeve 1 and a winding potentiometer body 9. The surface of the copper sleeve 1 is provided with a plurality of vents 2. The surfaces of the plurality of vents 2 are provided with protective nets 3. The inner walls of the plurality of protective nets 3 are fixedly connected with a plurality of copper sheets 4. A connecting ring 5 is fixedly provided at the top of the copper sleeve 1. A supporting ring 6 is fixedly provided at the bottom of the copper sleeve 1. A winding potentiometer body 9 is provided inside the copper sleeve 1. A shell 10 is provided on the surface of the winding potentiometer body 9. The surface of the shell 10 is provided with a plurality of heat dissipation A positioning plate 12 is provided at the top of the shell 10, and the bottom end of the positioning plate 12 is connected to the top of the connecting ring 5. The winding potentiometer body 9 is rotatably connected with a rotating shaft 15, and the top of the rotating shaft 15 is engaged with a knob cap 17 through a groove 16. By arranging the heat dissipation port 11 on the surface of the shell 10, the circulation of air inside and outside the shell 10 can be ensured, and the heat accumulation of the winding potentiometer body 9 can be prevented. The heat of the winding potentiometer body 9 can be absorbed by the copper sleeve 1 and the copper sheet 4, and the winding potentiometer body 9 can be dissipated.

[0021] See also Figure 2 and Figure 4 The connecting ring 5 is connected with the top of the outer shell 10 through insertion, the inner ring of the supporting ring 6 is provided with a rubber ring 8, and the supporting ring 6 is connected with the bottom of the outer shell 10 through the rubber ring 8. The outer shell 10 can be penetrated by the connecting ring 5, and the bottom of the outer shell 10 and the copper sleeve 1 can be supported by the supporting ring 6. The rubber ring 8 can improve the fit and stability between the supporting ring 6 and the outer shell 10.

[0022] See also Figure 2The top of the rotating shaft 15 is engaged with the inside of the knob cap 17, a groove 16 is provided on one side of the top of the rotating shaft 15, a convex strip 18 is fixedly provided on the inner wall of the knob cap 17, the convex strip 18 is engaged with the groove 16, and a plug 19 is provided at the bottom end of the convex strip 18. The rotational force of the knob cap 17 can be transmitted through the groove 16 and the convex strip 18, so that the knob cap 17 can drive the rotating shaft 15 to rotate.

[0023] See also Figure 1 and Figure 3 The surface of the positioning plate 12 is respectively provided with a rod groove 13 and a terminal channel 14, the rod groove 13 is coaxial with the housing 10, and the shaft 15 is inserted and connected with the rod groove 13, the rod groove 13 can pass the shaft 15, and the terminal of the winding potentiometer body 9 can be passed through the terminal channel 14.

[0024] See also Figure 2 and Figure 3 The top of the connecting ring 5 is fixedly connected to the bottom end of the positioning plate 12 through a plurality of connecting bolts 7. A plurality of through holes 21 are opened on the surface of the positioning plate 12. The plurality of connecting bolts 7 are respectively inserted and connected with the plurality of through holes 21. The plurality of connecting bolts 7 are all threadedly connected to the connecting ring 5. The connecting bolts 7 can be inserted through the through holes 21, and the connecting ring 5 can be supported by the connecting bolts 7.

[0025] See also Figure 1 The surface of the knob cap 17 is provided with anti-skid convex teeth, and the bottom end of the knob cap 17 is fixedly connected with a baffle 20. The anti-skid convex teeth can improve the anti-skid ability of the knob cap 17, and the baffle 20 can prevent the fingers of the staff from touching the positioning plate 12.

[0026] In summary, in the present invention, the staff first sets the copper sleeve 1 on the surface of the housing 10, and then connects the connecting ring 5 with the positioning plate 12 through the connecting bolts 7. The supporting ring 6 can support the bottom of the housing 10 and the copper sleeve 1 through the rubber ring 8. Then, the knob cap 17 is engaged with the rotating shaft 15 through the convex strips 18 and the grooves 16, and the knob cap 17 is installed. Finally, the wiring of the winding potentiometer body 9 is carried out through the terminals of the winding potentiometer body 9. When in use, the staff rotates the knob cap 17, and the knob cap 17 can transmit the rotational force through the convex strips 18. When the winding potentiometer body 9 is in a long-term working and overload working state, the heat dissipation port 1 1 can ensure the circulation of air inside and outside the shell 10, the copper sleeve 1 and the copper sheet 4 can absorb the heat of the winding potentiometer body 9 and generate heat exchange with the external air, which can reduce the temperature of the winding potentiometer body 9 and dissipate heat for it. The vent 2 can improve the ventilation capacity of the copper sleeve 1 and enhance the heat dissipation effect of the winding potentiometer body 9. The winding potentiometer body 9 is not easy to be damaged. The protective net 3 supports the copper sheet 4 while providing protection for the surface of the vent 2 to prevent debris from entering the copper sleeve 1 through the vent 2. When the copper sleeve 1 needs to be disassembled, the staff first unplugs the knob cap 17, then loosens the connecting bolt 7, stops limiting the connecting ring 5, and then removes the copper sleeve 1.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] Although the 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 small-diameter multi-turn wire-wound potentiometer, comprising a copper sleeve (1) and a wire-wound potentiometer body (9), characterized in that: The copper sleeve (1) is provided with a plurality of ventilation holes (2) on its surface, and a plurality of protective nets (3) are provided on the surfaces of the plurality of ventilation holes (2). The inner walls of the plurality of protective nets (3) are fixedly connected with a plurality of copper sheets (4). A connecting ring (5) is fixedly provided at the top end of the copper sleeve (1), and a supporting ring (6) is fixedly provided at the bottom end of the copper sleeve (1). A winding potentiometer body (9) is provided inside the copper sleeve (1), and a shell (10) is provided on the surface of the winding potentiometer body (9). A plurality of heat dissipation holes (11) are provided on the surface of the shell (10). A positioning plate (12) is provided at the top end of the shell (10), and the bottom end of the positioning plate (12) is connected to the top end of the connecting ring (5). The winding potentiometer body (9) is rotatably connected with a rotating shaft (15), and the top end of the rotating shaft (15) is connected to a knob cap (17) by snapping into a groove (16).

2. A small diameter multi-turn wirewound potentiometer according to claim 1, characterized in that: The connecting ring (5) is connected to the top of the outer shell (10) by insertion, the inner ring of the supporting ring (6) is provided with a rubber ring (8), and the supporting ring (6) is connected to the bottom of the outer shell (10) by snapping through the rubber ring (8).

3. A small diameter multi-turn wirewound potentiometer according to claim 1, characterized in that: The top end of the rotating shaft (15) is snap-fitted with the inside of the knob cap (17); a groove (16) is provided on one side of the top end of the rotating shaft (15); a convex strip (18) is fixedly provided on the inner wall of the knob cap (17); the convex strip (18) is snap-fitted with the groove (16); and a plug (19) is provided at the bottom end of the convex strip (18).

4. A small-diameter multi-turn wirewound potentiometer according to claim 1, characterized in that: The surface of the positioning plate (12) is respectively provided with a rod groove (13) and a terminal channel (14); the rod groove (13) is coaxial with the housing (10); and the rotating shaft (15) is interlaced and connected with the rod groove (13).

5. A small diameter multi-turn wirewound potentiometer according to claim 1, characterized in that: The top end of the connecting ring (5) is fixedly connected to the bottom end of the positioning plate (12) via a plurality of connecting bolts (7); a plurality of through holes (21) are provided on the surface of the positioning plate (12); a plurality of connecting bolts (7) are respectively inserted and connected to the plurality of through holes (21); and a plurality of connecting bolts (7) are all threadedly connected to the connecting ring (5).

6. A small diameter multi-turn wirewound potentiometer according to claim 1, characterized in that: The surface of the knob cap (17) is provided with anti-slip convex teeth, and the bottom end of the knob cap (17) is fixedly connected with a baffle (20).

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