Low-cost potentiometer structure
By adopting a low-cost potentiometer structure in traditional sealed rotary potentiometers, including plastic shaft handles, sleeves, bases and brushes, unnecessary support and cover plates are eliminated, and the problem of high cost of traditional potentiometers is solved, and the effect of structure simplification and cost reduction is achieved.
Patent Information
- Application Number
- CN202420751893.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-04-12
AI Technical Summary
Traditional sealed rotary potentiometers are costly and need to be optimized to reduce costs.
A low-cost potentiometer structure is adopted, including a plastic shaft handle, a plastic sleeve with an axial through-hole, a plastic base stacked and fixed to the bottom end of the sleeve in turn, and a brush corresponding to the number of bases. By fixing the brush directly on the bottom surface of the turntable part and rotatably contacting the resistor in the base, the bracket and cover for installing the brush are eliminated, and the structure and assembly steps are simplified.
The product structure and assembly steps are simplified, the product cost is reduced, and the normal working performance of the potentiometer is maintained.
Smart Images
Figure CN222653728U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of potentiometers, in particular to a low-cost rotary potentiometer structure. Background Art
[0002] The traditional sealed rotary potentiometer technology is relatively mature, refer to Figure 1 As shown, taking a single-gang potentiometer as an example, the basic structure of this type of potentiometer includes: a shaft handle 1, a shaft sleeve 2, a plastic base 3 with a resistor body arranged at the bottom end of the shaft sleeve 2, and a brush 4 that is in rotational contact with the resistor body; wherein the shaft handle 1 includes a handle portion 11, a rotating disk 12, and a flat shaft 13 that are concentrically arranged; the top surface of the base 3 has a first sinking cavity, the side wall of the first sinking cavity has a limiting protrusion, the bottom surface of the base 3 also has a second sinking cavity 31, and the resistor body is plastic-molded on the top surface of the second sinking cavity 31; the handle The part 11 passes through the sleeve 2 upward, and the rotating disk 12 protrudes with a stop block 121 to limit the rotation angle of the shaft handle 1 through the limit convex, and the flat shaft 13 passes through the base 3 and enters the second sink cavity 31. A bracket 41 for mounting the brush 4 is also provided in the second sink cavity 31. The bracket 41 is fixed on the flat shaft 13 through a flat hole 411. The bottom surface of the base 3 is also provided with a cover plate 5 that closes the second sink cavity 31. Finally, the cover plate 5, the base 3, and the sleeve 2 are riveted together along the axial direction by rivets 6.
[0003] However, as the market changes, manufacturers hope to further reduce product costs and improve market competitiveness. Therefore, it is necessary to optimize this type of traditional potentiometer to reduce costs. Utility Model Content
[0004] The purpose of the utility model is to improve the structure of the traditional sealed potentiometer to reduce the product cost.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A low-cost potentiometer structure comprises a shaft handle, a shaft sleeve with an axial through hole, at least one group of plastic bases stacked and fixed in sequence at the bottom end of the shaft sleeve, and brushes corresponding to the number of the bases; a first sinking cavity is formed inwardly on the top surface of the base, and a resistor is fixedly arranged on the inner bottom surface of the first sinking cavity, and a second sinking cavity is formed inwardly on the bottom surface of the shaft sleeve, and the first sinking cavity and the second sinking cavity of the uppermost base are combined to form an installation cavity; the shaft handle is a plastic one-piece molded component, comprising a handle portion that passes through the shaft sleeve upward from the axial through hole, and a turntable portion located in the installation cavity, the bottom surface of the turntable portion is fixed with the brush that is in rotational contact with the resistor, a stop block is formed inwardly on the top surface of the turntable portion, and a limiting protrusion that limits the rotation angle of the stop block is formed inwardly on the inner wall of the second sinking cavity.
[0007] In a preferred embodiment, the bottom surface of the base at the bottom is a closed surface.
[0008] In a preferred embodiment, the bases, as well as the shaft sleeve and the uppermost base, are sealed and matched with each other by bonding, welding, snap-fitting and / or plug-in connection.
[0009] In a preferred embodiment, the bases, as well as the sleeve and the uppermost base, are plugged into each other through a plurality of protrusions formed on one side member and a plurality of recesses formed on the other side member, and the protrusions and the recesses are interference fit.
[0010] A preferred solution is that when there are no less than two groups of bases, except for the base at the bottom, the bottom surface of each of the upper bases has an axial through hole, and the shaft handle concentrically extends downward to have a flat shaft passing through each of the through holes; except for the base at the top, a disc-shaped bracket for mounting the brush is provided in the first sink cavity of each of the lower bases, and each bracket is adaptively penetrated on the flat shaft through a flat hole.
[0011] In a preferred embodiment, the shaft sleeve is a plastic component.
[0012] The beneficial effect of the utility model is that since the stop block is arranged on the top surface of the turntable part, the brush can be directly fixed on the bottom surface of the turntable part and rotated to contact the resistor body in the first sink cavity of the uppermost base. Compared with the existing potentiometer, the bracket for installing the brush is omitted in the uppermost base, and the base at the lowermost end does not need to be provided with a cover plate to block the bottom surface of the base, thereby simplifying the product structure and assembly steps, and reducing product costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0014] Figure 1 It is a schematic diagram of the exploded structure of parts of a single-joint potentiometer in the background technology;
[0015] Figure 2 This is a schematic diagram of the exploded structure of the parts of a single-joint potentiometer according to the first embodiment;
[0016] Figure 3 This is a schematic diagram of the base structure of Example 1;
[0017] Figure 4 This is a schematic diagram of the exploded structure of the parts of a double potentiometer according to the second embodiment. DETAILED DESCRIPTION
[0018] The utility model is further described below in conjunction with the accompanying drawings:
[0019] The embodiments described with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. In the description of the present application, it should be understood that the orientation or positional relationship indicated in the terms is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. In addition, unless otherwise clearly specified and limited, terms such as "install", "connect", "connect", and "fix" should be understood in a broad sense, and those of ordinary skill in the art can understand the specific meanings of the above terms in the present application according to the specific circumstances.
[0020] Embodiment 1:
[0021] refer to Figure 2 and Figure 3 As shown, this embodiment is described by taking a single-gang potentiometer as an example, and the potentiometer comprises a shaft handle 1, a plastic sleeve 2 having an axial through hole 200, a plastic base 3 fixed to the bottom end of the sleeve 2, and a set of brushes 4. A first sinking cavity 31 is formed inwardly on the top surface of the base 3, and a resistor 32 is fixedly disposed on the inner bottom surface of the first sinking cavity 31, and the bottom surface of the base 3 is a closed surface. A second sinker cavity 21 is formed in a concave shape on the bottom surface of the sleeve 2, and the first sinker cavity 31 and the second sinker cavity 21 together form a sealed installation cavity. The shaft handle 1 is a plastic one-piece molded component, including a handle portion 11 that extends upward from the axial through hole 200 through the sleeve 2, and a turntable portion 12 located in the installation cavity, the bottom surface of the turntable portion 12 is fixed with the brush 4 that is in rotational contact with the resistor 32, the top surface of the turntable portion 12 is integrally formed with a stop block 121, and the inner wall of the second sinker cavity 21 is integrally formed with a limiting protrusion 211 that limits the rotation angle of the stop block 121. Among them, the sleeve 2 and the base 3 are plugged into each other through a plurality of convex columns 33 formed on the base 3 and a plurality of concave holes 22 formed on the sleeve 2, and the convex columns 33 and the concave holes 22 are interference fit. In other embodiments, the sleeve 2 and the base 3 are sealed and fitted with each other by one or more methods such as gluing, ultrasonic welding, and snap-fitting.
[0022] Since the stop block 121 is arranged on the top surface of the turntable portion 12, the brush 4 can be directly fixed on the bottom surface of the turntable portion 12 and can be rotationally contacted with the resistor 32 in the first cavity 31 of the base 3. Compared with the existing potentiometer, the bracket for installing the brush 4, the cover plate for blocking the bottom surface of the base 3, and the rivet for connecting and fixing the base 3 and the sleeve 2 can be omitted, thereby simplifying the product structure and assembly steps and reducing the product cost.
[0023] Embodiment 2:
[0024] refer to Figure 4As shown, this embodiment is explained by taking a double potentiometer as an example. The basic structural principle of the potentiometer is the same as that of the single potentiometer of the embodiment 1, except that: the base 3 includes two groups stacked up and down, namely a first base 3a connected and fixed to the bottom end of the sleeve 2, and a second base 3b connected and fixed to the bottom end of the first base 3a, wherein the bottom surface of the first base 3a has an axial through hole, and the shaft handle 1 extends concentrically downward with a flat shaft 13 passing through the through hole; and a disc-shaped bracket 41 for mounting the brush 4 is provided in the first sink cavity 31 of the second base 3b, and the bracket 41 is adaptively penetrated on the flat shaft 13 through the flat hole 411.
[0025] Compared with the existing potentiometer, a bracket for installing the brush 4 can be omitted in the first base 3a, and the cover plate for sealing the bottom of the second base 3b can be omitted; similarly, the first base 3a and the second base 3b are plugged into each other through the protrusion 33 and the recessed hole 22; therefore, compared with the existing double potentiometer, the product structure and assembly steps are simplified, and the product cost can also be reduced.
[0026] Embodiment three:
[0027] This embodiment is described by taking a multi-gang potentiometer as an example, specifically a quadruple potentiometer, whose structural principle is basically the same as the double-gang potentiometer in the second embodiment, and the only difference is the number of bases. Therefore, the effect of reducing product costs can also be achieved.
[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A low-cost potentiometer structure, characterized in that: The invention comprises a shaft handle, a shaft sleeve with an axial through hole, at least one group of plastic bases stacked and fixed on the bottom end of the shaft sleeve in sequence, and brushes corresponding to the number of the bases; a first sinking cavity is formed inwardly on the top surface of the base, and a resistor is fixedly arranged on the inner bottom surface of the first sinking cavity, and a second sinking cavity is formed inwardly on the bottom surface of the shaft sleeve, and the first sinking cavity and the second sinking cavity of the uppermost base are combined to form an installation cavity; the shaft handle is an integrally molded plastic component, comprising a rotating handle portion that passes through the shaft sleeve upward from the axial through hole, and a turntable portion located in the installation cavity, the bottom surface of the turntable portion is fixed with the brush that is in rotational contact with the resistor, a stop block is integrally formed on the top surface of the turntable portion, and a limiting protrusion that limits the rotation angle of the stop block is integrally formed on the inner wall of the second sinking cavity.
2. A low-cost potentiometer structure according to claim 1, characterized in that: The bottom surface of the base at the bottom end is a closed surface.
3. A low-cost potentiometer structure according to claim 1, characterized in that: The bases, as well as the shaft sleeve and the uppermost base, are sealed and matched with each other by bonding, welding, buckling and / or plugging.
4. A low-cost potentiometer structure according to claim 3, characterized in that: The bases, as well as the sleeve and the uppermost base, are plugged and matched with each other through a plurality of convex columns formed on one side component and a plurality of concave holes formed on the other side component, and the convex columns and the concave holes are interference fit.
5. A low-cost potentiometer structure according to claim 1, characterized in that: When there are no less than two groups of the bases, except for the base at the bottom, the bottom surfaces of the upper bases have axial through holes, and the shaft handle concentrically extends downward to have a flat shaft passing through each of the through holes; except for the base at the top, the first sink cavity of each of the lower bases is provided with a disc-shaped bracket for mounting the brush, and each bracket is adaptively inserted into the flat shaft through a flat hole.
6. A low-cost potentiometer structure according to claim 1, characterized in that: The shaft sleeve is a plastic component.