Potentiometer

Abstract

The utility model belongs to the technical field of electrical components, and discloses a potentiometer. The potentiometer comprises a shell and a transmission structure arranged in the shell, the transmission structure comprises a body assembly, a rotor assembly and a rubber rotor assembly, and an inner hole is formed in the rubber rotor assembly and used for being tightly matched with a long shaft of an electric appliance to replace a traditional solid shaft, so that the assembly space can be saved, and the potentiometer is suitable for medium-sized household appliances such as fans and clothes dryers; the electric appliance long shaft rotates to drive the rubber rotor assembly to rotate, and the rubber rotor assembly is in sliding contact with the carbon membrane during rotation to change the accessed resistance value so as to realize resistance adjustment; meanwhile, one end of the rubber rotor assembly penetrates through the body assembly and is in transmission connection with the rotor assembly, the rotor assembly is driven to rotate through the rubber rotor assembly when the long shaft of the electric appliance rotates, the rotor assembly can be matched with the positioning disc of the body assembly, the gear positioning effect is achieved, the gear can be accurately positioned when signals are adjusted, and the reliability of the electric appliance is improved. And the signal adjustment is more stable and accurate.

Description

Technical Field

[0001] This utility model relates to the field of electrical component technology, and in particular to a potentiometer. Background Technology

[0002] A potentiometer is a variable resistor that changes its resistance value by rotating a shaft. It is mainly used to adjust the voltage or current in a circuit, such as as a volume control or height adjuster.

[0003] Traditional potentiometers typically feature a miniature solid shaft and often employ a rotation method with light torque and no positioning capability. This makes it difficult to accurately position the desired level when adjusting the signal. Furthermore, solid shafts are commonly used in miniature knobs, which require a significant amount of assembly space and are not suitable for the knob usage requirements of medium-sized household appliances such as fans and dryers.

[0004] In other words, traditional potentiometers have the disadvantages of having a miniature solid shaft, which takes up a lot of assembly space, is not suitable for the knob use requirements of medium-sized household appliances such as fans and dryers, and cannot accurately locate the user's required setting. Utility Model Content

[0005] The purpose of this utility model is to provide a potentiometer that uses an inner hole instead of a traditional solid shaft, which saves assembly space and is suitable for the use of medium-sized household appliances; it can accurately locate the gear when adjusting the signal, making the signal adjustment more stable and accurate.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a potentiometer, which includes a housing and a transmission structure disposed within the housing, the transmission structure including:

[0008] The main body assembly is fixed inside the housing. The main body assembly has a positioning plate on one side and a carbon film on the other side.

[0009] The rotor assembly, in conjunction with the positioning disc, is used to position gears;

[0010] A transfer plate assembly, one end of which passes through the body assembly and is connected to the rotor assembly for transmission, and the other end has an inner hole for tight fitting with an electrical long shaft extending into the housing. The rotation of the electrical long shaft can drive the transfer plate assembly to rotate. When the transfer plate assembly rotates, it slides in contact with the carbon film. The rotation of the electrical long shaft can drive the rotor assembly to rotate through the transfer plate assembly.

[0011] As an optional technical solution for the potentiometer, the rotor assembly has a groove at its end, and the end of the rubber transfer plate assembly is at least partially inserted into the groove and tightly fitted with the inner wall of the groove to drive the rotor assembly.

[0012] As an optional technical solution for a potentiometer, the rotor assembly includes a rotor and two positioning plates. The rotor is connected to the rubber plate assembly for transmission. The two positioning plates are symmetrically arranged on both sides of the rotor and cooperate with the positioning disk.

[0013] As an optional technical solution for a potentiometer, the positioning disk is provided with multiple toothed grooves, which are arranged in a circular pattern. The rotation of the rotor assembly can drive the positioning plate to move on the tooth surface of the toothed grooves or between two adjacent toothed grooves.

[0014] As an optional technology for potentiometers, the rotor and the positioning plate are riveted together.

[0015] As an optional technical solution for a potentiometer, the adhesive transfer plate assembly includes an adhesive transfer plate body and a brush. One end of the adhesive transfer plate body is connected to the rotor assembly for transmission, and the other end is provided with the inner hole. The brush is connected to the adhesive transfer plate body and contacts the carbon film. Rotation of the adhesive transfer plate body can drive the brush to slide on the surface of the carbon film.

[0016] As an alternative technical solution for a potentiometer, the brush includes a fixing part and a contact part. The fixing part is connected to the adhesive transfer sheet body and contacts the housing, and the contact part extends obliquely toward the carbon film and contacts the carbon film.

[0017] As an optional technical solution for a potentiometer, the body assembly is provided with a protrusion, and the housing is provided with a snap-fit ​​groove, wherein the protrusion and the snap-fit ​​groove are engaged in a snap-fit ​​relationship.

[0018] As an optional technical solution for potentiometers, the housing has at least three spaced positioning posts for insertion onto the main board of the electrical appliance.

[0019] As an optional technical solution for a potentiometer, the housing includes an outer shell and a bracket, the transmission structure is located inside the outer shell, and the bracket is connected to the outer shell to stop and limit the transmission structure.

[0020] Beneficial effects:

[0021] This utility model provides a potentiometer, which includes a housing and a transmission structure disposed within the housing. The transmission structure includes a body assembly, a rotor assembly, and a rubber diaphragm assembly. The body assembly is fixed inside the housing, with a positioning plate on one side and a carbon diaphragm on the other side. The rotor assembly cooperates with the positioning plate to position the gear. One end of the rubber diaphragm assembly passes through the body assembly and is connected to the rotor assembly in a transmission manner. The other end of the rubber diaphragm assembly has an inner hole for tightly fitting with an electrical long shaft extending into the housing. The rotation of the electrical long shaft can drive the rubber diaphragm assembly to rotate. When the rubber diaphragm assembly rotates, it slides in contact with the carbon diaphragm. The rotation of the electrical long shaft can drive the rotor assembly to rotate through the rubber diaphragm assembly. By designing a housing and transmission structure, the transmission structure includes a main body assembly, a rotor assembly, and a rubber diaphragm assembly. The rubber diaphragm assembly has an inner hole for tight fitting with the long shaft of the appliance, replacing the traditional solid shaft. This saves assembly space and is suitable for medium-sized household appliances such as fans and dryers. The rotation of the appliance's long shaft drives the rubber diaphragm assembly to rotate. When the rubber diaphragm assembly rotates, it slides into contact with the carbon film to change the connected resistance value, thus achieving resistance adjustment. Simultaneously, one end of the rubber diaphragm assembly passes through the main body assembly and is connected to the rotor assembly. When the appliance's long shaft rotates, it drives the rotor assembly to rotate via the rubber diaphragm assembly. The rotor assembly can cooperate with the positioning plate to position the gear. This allows for precise gear positioning during signal adjustment, making signal adjustment more stable and accurate. Attached Figure Description

[0022] Figure 1 This is a first-view structural schematic diagram of the potentiometer provided in an embodiment of the present invention;

[0023] Figure 2 This is a structural schematic diagram of the potentiometer from a second perspective provided in an embodiment of this utility model;

[0024] Figure 3 This is an exploded view of the potentiometer provided in an embodiment of this utility model;

[0025] Figure 4 This is a cross-sectional view of the potentiometer provided in an embodiment of the present invention from a first perspective;

[0026] Figure 5 This is a cross-sectional view of the potentiometer provided in an embodiment of the present invention from a second perspective;

[0027] Figure 6 This is an exploded view of the rotor assembly provided in an embodiment of the present utility model;

[0028] Figure 7 This is an exploded view of the body components and terminals provided in this embodiment of the utility model;

[0029] Figure 8 This is an exploded view of the adhesive transfer assembly provided in this embodiment of the present invention.

[0030] In the picture:

[0031] 10. Housing; 11. Bracket; 111. Second terminal pin; 112. Bending section; 12. Outer shell; 121. Positioning pin; 122. Limiting surface;

[0032] 20. Rotor assembly; 21. Rotor; 22. Positioning plate;

[0033] 30. Body assembly; 31. Body; 311. Positioning disc; 312. Protrusion; 32. Carbon diaphragm;

[0034] 40. Adhesive transfer sheet assembly; 41. Adhesive transfer sheet body; 42. Brush; 421. Fixing part; 422. Contact part;

[0035] 50. First terminal pin. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] like Figures 1 to 5 As shown, this embodiment provides a potentiometer, which includes a housing 10 and a transmission structure disposed within the housing 10. The transmission structure includes a body assembly 30, a rotor assembly 20, and a rubber diaphragm assembly 40. The body assembly 30 is fixed within the housing 10. A positioning disk 311 is provided on one side of the body assembly 30, and a carbon diaphragm 32 is provided on the other side. The rotor assembly 20 cooperates with the positioning disk 311 to position the gear. One end of the rubber diaphragm assembly 40 passes through the body assembly 30 and is connected to the rotor assembly 20 in a transmission manner. The other end of the rubber diaphragm assembly 40 has an inner hole for tightly fitting with an electrical long shaft extending into the housing 10. The rotation of the electrical long shaft can drive the rubber diaphragm assembly 40 to rotate. When the rubber diaphragm assembly 40 rotates, it slides in contact with the carbon diaphragm 32. The rotation of the electrical long shaft can drive the rotor assembly 20 to rotate through the rubber diaphragm assembly 40.

[0041] By setting up a housing 10 and a transmission structure, the transmission structure includes a body assembly 30, a rotor assembly 20, and a rubber diaphragm assembly 40. The rubber diaphragm assembly 40 has an inner hole for tight fitting with the long shaft of the appliance, replacing the traditional solid shaft, which can save assembly space and is suitable for medium-sized household appliances such as fans and dryers. The rotation of the long shaft of the appliance can drive the rubber diaphragm assembly 40 to rotate. When the rubber diaphragm assembly 40 rotates, it slides into contact with the carbon diaphragm 32 to change the connected resistance value, thereby realizing resistance adjustment. At the same time, one end of the rubber diaphragm assembly 40 passes through the body assembly 30 and is connected to the rotor assembly 20 for transmission. When the long shaft of the appliance rotates, it drives the rotor assembly 20 to rotate through the rubber diaphragm assembly 40. The rotor assembly 20 can cooperate with the positioning plate 311 to play the role of positioning the gear. When adjusting the signal, it can accurately position the gear, making the signal adjustment more stable and accurate.

[0042] Specifically, the housing 10 includes an outer shell 12 and a bracket 11. The transmission structure is located inside the outer shell 12, and the bracket 11 is connected to the outer shell 12 to stop and limit the transmission structure. By assembling the outer shell 12 and the bracket 11 into the housing 10, the transmission structure is mounted on the outer shell 12, and the bracket 11 is placed on the outer shell 12 to block the opening of the outer shell 12, thereby confining the transmission structure inside the housing 10.

[0043] In this embodiment, the bracket 11 is placed inside the housing 12, and the outer wall of the end of the housing 12 is bent to the lower surface of the bracket 11 using a hot riveting process to prevent the transmission structure and the bracket 11 from detaching from the housing 12. In this embodiment, a mounting hole is provided at the middle position of the top of the housing 12 for alignment with the rotor assembly 20.

[0044] Optionally, the bracket 11 has a bent portion 112 protruding from the side facing the outer casing 12, and the bent portion 112 is inserted into the outer casing 12. By providing the bent portion 112 on the bracket 11 and inserting it into the outer casing 12, a limiting function can be achieved to ensure the accuracy of the installation position of the bracket 11.

[0045] See Figure 2 The housing 10 has at least three spaced-apart positioning posts 121 for insertion into the main board of the electrical appliance. By providing positioning posts 121 on the housing 10 to match the holes on the main board, the accuracy of the potentiometer's installation position can be ensured. In this embodiment, the positioning posts 121 are provided on the outer casing 12 and are integral with the outer casing 12. In other embodiments, corresponding positioning holes can also be provided on the housing 10 and the main board of the electrical appliance, and positioning pins can be used for positioning.

[0046] See Figure 3 and Figure 6 The rotor assembly 20 has a groove at its end, and the end of the rubber sheet assembly 40 is at least partially inserted into the groove and tightly fitted with the inner wall of the groove to achieve a transmission connection with the rotor assembly 20. By providing a groove at the end of the rotor assembly 20, and the end of the rubber sheet assembly 40 passing through the body assembly 30 and tightly fitting with the groove to achieve a transmission connection, the resistance can be adjusted and the positioning position can be set on both sides of the body assembly 30 respectively, without the need for additional components, which facilitates assembly.

[0047] Furthermore, the rotor assembly 20 includes a rotor 21 and two positioning plates 22. The rotor 21 is connected to the rubber plate assembly 40 for transmission. The two positioning plates 22 are symmetrically arranged on both sides of the rotor 21 and cooperate with the positioning disk 311. By setting two symmetrical positioning plates 22 on the rotor 21, it helps to ensure the stability of gear positioning.

[0048] Optionally, the positioning disk 311 is provided with multiple toothed grooves arranged in a ring. Rotation of the rotor assembly 20 causes the positioning piece 22 to move on the toothed surface of the grooves or between adjacent grooves. By providing toothed grooves on the positioning disk 311, the positioning piece 22 closely engages with the grooves. During rotation, the positioning piece 22 moves on the toothed surface of the grooves or between adjacent grooves, thereby generating a positioning sensation. In this embodiment, the positioning piece 22 is a spring plate, and the side of the positioning piece 22 facing the positioning disk 311 has a bud point, which closely engages with the toothed grooves of the positioning disk 311. In other embodiments, the positioning piece 22 and the toothed grooves can also be replaced with other forms of positioning structures such as wheel grooves and positioning wheels.

[0049] In this embodiment, the rotor 21 and the positioning piece 22 are riveted together. Compared with other connection methods, riveting connection has better load-bearing capacity and reliability, lower cost, can complete the connection quickly and efficiently, and can determine whether the connection is firm through simple inspection, facilitating timely inspection and maintenance.

[0050] Specifically, the positioning plate 311 has 16 toothed grooves to obtain 16 rotational positioning positions. The positioning torque when the potentiometer is rotated for positioning needs to reach 400gf.cm to 600gf.cm. The multi-position positioning feel enhances the user experience of the potentiometer and maintains the stability of the positioner during use.

[0051] See Figure 3 and Figure 7 The body assembly 30 includes a body 31 and a carbon film 32. The carbon film 32 is disposed on one side of the body 31, and a positioning disk 311 is provided on the other side of the body 31. In this embodiment, the carbon film 32 is obtained by coating and curing on the body 31, and the main materials of the carbon film 32 are polymer and carbon black.

[0052] Optionally, the body assembly 30 has a protrusion 312, and the housing 10 has a snap-fit ​​groove, with the protrusion 312 engaging with the snap-fit ​​groove. By providing the protrusion 312 on the body assembly 30 and the snap-fit ​​groove on the housing 10, when the body assembly 30 is installed into the housing 10, the body assembly 30 and the housing 10 engage, preventing the body assembly 30 from rotating relative to the housing 10 and affecting the normal operation of the potentiometer. In this embodiment, the protrusion 312 protrudes from the outer surface of the body 31, and the snap-fit ​​groove is provided on the inner side of the housing 12. In other embodiments, a protrusion may also be provided on the housing 12, and a snap-fit ​​groove may be provided at a corresponding position on the body 31.

[0053] In this embodiment, the housing 10 is further provided with a limiting surface 122, and the outer peripheral edge of the main body assembly 30 abuts against the limiting surface 122. By providing the limiting surface 122 on the housing 10, the main body assembly 30 can abut against the limiting surface 122 during installation, ensuring the accuracy of the installation position of the main body assembly 30 and avoiding the misalignment of the main body assembly 30 from affecting the positioning of the positioning piece 22 and the positioning disk 311.

[0054] See Figure 3 and Figure 8 The transfer plate assembly 40 includes a transfer plate body 41 and a brush 42. One end of the transfer plate body 41 is connected to the rotor assembly 20 for transmission, and the other end has an inner hole. The brush 42 is connected to the transfer plate body 41 and contacts the carbon diaphragm 32. Rotation of the transfer plate body 41 can drive the brush 42 to slide on the surface of the carbon diaphragm 32. By setting the transfer plate body 41 and the brush 42, and utilizing the transmission cooperation between the transfer plate body 41, the rotor assembly 20, and the electrical long shaft, when the electrical long shaft rotates, it drives the transfer plate body 41 and the rotor assembly 20 to rotate synchronously. The brush 42 slides on the surface of the carbon diaphragm 32. The magnitude of the rotation angle can determine the amplitude passing through the carbon diaphragm 32, thereby determining the output voltage.

[0055] Specifically, the brush 42 includes a fixing part 421 and a contact part 422. The fixing part 421 is connected to the adhesive transfer sheet body 41 and contacts the housing 10. The contact part 422 extends obliquely toward the carbon film 32 and contacts the carbon film 32. By providing the fixing part 421 and the contact part 422, the brush 42 is connected to the adhesive transfer sheet body 41 via the fixing part 421, contacts the housing 10, and the contact part 422 extends obliquely and contacts the carbon film 32. Current can be introduced from the body 31, pass through the carbon film 32, and finally be led out from the housing 10.

[0056] In this embodiment, the brush 42 is in the shape of a circular bent sheet; the potentiometer also includes a first terminal 50, one end of which is connected to the body 31 and the other end extends to the outside of the housing 10 for connection with the main board of the electrical appliance; a second terminal 111 is provided on the bracket 11.

[0057] The following is the specific assembly and usage process of the potentiometer:

[0058] The rotor assembly 20, the body assembly 30, and the rubber transfer plate assembly 40 are sequentially installed inside the housing 12, ensuring that the end of the rotor 21 is aligned with the mounting hole of the housing 12 (or the end of the rotor 21 is inserted into the mounting hole of the housing 12). The bracket 11 is then placed inside the housing 12, and the outer wall of the end of the housing 12 is bent to the lower surface of the bracket 11 using a hot riveting process, thereby confining the transmission structure inside the housing 12. The outer wall of the end of the housing 12 is bent to the lower surface of the bracket 11 using a hot riveting process to prevent the transmission structure and the bracket 11 from detaching from the housing 12. The positioning post 121 on the housing 12 is used to cooperate with the positioning hole of the main board of the electrical appliance to assemble the potentiometer in the corresponding position on the main board of the electrical appliance. The second terminal pin 111 on the bracket 11 and the two first terminal pins 50 connected to the body 31 are soldered and fixed to the main board of the electrical appliance.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A potentiometer, characterized by The potentiometer comprises a housing (10) and a transmission structure arranged in the housing (10), wherein the transmission structure comprises: a body assembly (30) fixed in the housing (10), one side of the body assembly (30) being provided with a positioning disc (311), and the other side being provided with a carbon film (32); a rotor assembly (20) cooperating with the positioning disc (311) for positioning gears; a rubber rotating plate assembly (40), one end of the rubber rotating plate assembly (40) penetrating through the body assembly (30) and being in transmission connection with the rotor assembly (20), and the other end having an inner hole for being tightly fitted with an electric appliance long shaft extending into the housing (10), the electric appliance long shaft being capable of driving the rubber rotating plate assembly (40) to rotate when rotating, the rubber rotating plate assembly (40) being in sliding contact with the carbon film (32) when rotating, and the electric appliance long shaft being capable of driving the rotor assembly (20) to rotate through the rubber rotating plate assembly (40).

2. The potentiometer of claim 1, wherein The rotor assembly (20) is provided with a groove at an end, and the rubber rotating plate assembly (40) is at least partially inserted into the groove and tightly fitted with the inner wall of the groove to be in transmission connection with the rotor assembly (20).

3. The potentiometer of claim 1, wherein The rotor assembly (20) comprises a rotor (21) and two positioning plates (22), the rotor (21) being in transmission connection with the rubber rotating plate assembly (40), and the two positioning plates (22) being symmetrically arranged at two sides of the rotor (21) and cooperating with the positioning disc (311).

4. The potentiometer of claim 3, wherein The positioning disc (311) is provided with a plurality of tooth grooves, and the plurality of tooth grooves are arranged in a circular ring, the rotor assembly (20) being capable of driving the positioning plates (22) to move on the tooth surface of the tooth grooves or between two adjacent tooth grooves.

5. The potentiometer of claim 3, wherein The rotor (21) and the positioning plates (22) are riveted.

6. The potentiometer of claim 1, wherein The rubber rotating plate assembly (40) comprises a rubber rotating plate main body (41) and a brush (42), one end of the rubber rotating plate main body (41) being in transmission connection with the rotor assembly (20), and the other end being provided with the inner hole, the brush (42) being connected to the rubber rotating plate main body (41) and being in contact with the carbon film (32), and the rubber rotating plate main body (41) being capable of driving the brush (42) to slide on the surface of the carbon film (32) when rotating.

7. The potentiometer of claim 6, wherein The brush (42) comprises a fixed part (421) and a contact part (422), the fixed part (421) being connected to the rubber rotating plate main body (41) and being in contact with the housing (10), and the contact part (422) being inclinedly extended towards the direction close to the carbon film (32) and being in contact with the carbon film (32).

8. Potentiometer according to any one of claims 1 to 7, characterized in that The body assembly (30) is provided with a protrusion (312), the housing (10) is provided with a clamping groove, and the protrusion (312) is clamped and matched with the clamping groove.

9. The potentiometer according to any one of claims 1 to 7, characterized in that The housing (10) is provided with at least three positioning columns (121) arranged at intervals for being inserted into a main board of an electric appliance.

10. The potentiometer according to any one of claims 1 to 7, characterized in that The housing (10) comprises an outer shell (12) and a support (11), the transmission structure being located in the outer shell (12), and the support (11) being connected to the outer shell (12) to stop and limit the transmission structure.

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