CN207474181U - A rotary potentiometer with switch - Google Patents

Abstract

The utility model provides a rotation type potentiometre of taking switch, the technical essential is: comprises a shaft sleeve, a potential part, a switch part and a shaft core which are sequentially connected and assembled; the electric potential part comprises a carbon sheet base and an electric brush assembly, and the electric brush assembly is arranged on the shaft core in a penetrating way and is assembled in an accommodating space at the bottom of the carbon sheet base; the switch part comprises a rotating arm, a switch component and a switch shell; switch housing has the open-ended accommodation space that makes progress to integrative injection moulding has switch terminal and fixed column, and switch module is located switch housing and articulates on the fixed column, and the rotor arm is used for toggle switch module and rotor arm and brush subassembly structure as an organic whole. The electric brush assembly is arranged at the bottom of the carbon sheet base, and compared with the prior art, a metal spacer material is omitted; the switch terminal and the fixing column are integrally injection-molded by the switch shell, so that the waterproof effect is realized, and a plurality of riveting and welding processes are omitted; the rotating arm and the electric brush assembly are of an integrated structure, so that the installation is simplified, and the rotating arm is firmer and more reliable.

Description

A rotary potentiometer with switch

technical field

The utility model relates to the technical field of potentiometers, in particular to a rotary potentiometer with a switch.

Background technique

Rotary potentiometers with switches are used in a variety of electronic devices as conventional electronic devices, and have switching functions and potential adjustment functions. The structure of this type of potentiometer is mainly composed of the shaft core, the rotation stop structure, the potential adjustment mechanism and the switch mechanism. Its structure usually includes a shaft core, a shaft sleeve, a carbon base and a brush, a switch assembly and a switch housing; a rotation stop structure is set between the shaft core and the shaft sleeve, and the carbon base and the brush are set toward the shaft sleeve , and a metal spacer is set between the carbon base and the shaft sleeve to support and compress the brush; the switch housing is used to install the switch assembly, and the switch housing is provided with a switch terminal and a fixing column for installing the switch assembly, usually The fixed column is riveted with a switch terminal, and then the switch terminal and the fixed column are pressed and fixed with multiple pieces of plastic by means of ultrasonic welding. After the switch assembly is installed, the switch case needs to be combined again by ultrasonic welding. Into a whole, so the process is complicated, and the waterproof effect of the switch housing is poor. On the whole, this kind of traditional potentiometer has many structural parts, complicated installation, and poor waterproof performance.

Utility model content

The purpose of the utility model is to provide a rotary potentiometer with a switch with simple structure and installation, and good waterproof performance.

In order to achieve the above object, the technical solution adopted in the utility model is:

A rotary potentiometer with a switch, comprising a shaft sleeve, a potential part and a switch part assembled in sequence, and a shaft core pierced through the axis lines of the above-mentioned parts; a rotation stop structure is arranged between the shaft sleeve and the shaft core; The potential part includes a carbon plate base and a brush assembly. The carbon plate base has a downward opening accommodation space. The top of the carbon plate base is connected to the bottom of the shaft sleeve. The brush assembly is installed on the shaft core and assembled on the carbon plate. In the accommodation space at the bottom of the base; the switch part includes a rotating arm, a switch assembly and a switch housing; the switch housing has an accommodation space that opens upwards, and the top of the switch housing is engaged with the bottom of the carbon sheet base, and the switch housing A switch terminal and a fixed column are integrally injection molded. The switch assembly is located in the accommodation space of the switch housing and is hinged on the fixed column. The rotating arm is used to toggle the switch assembly and the rotating arm is integrated with the brush assembly.

As a preference, the shaft sleeve has a downwardly open accommodation space, and the rotation stop structure includes a stop piece that passes through the shaft core and rotates with it, and is located on the inner bottom of the accommodation space of the shaft sleeve. A stop block for limiting the position of the stop piece; an annular boss is provided on the position where the shaft sleeve is in contact with the stop piece; the stop piece is made of metal and at least the surface in contact with the shaft sleeve has a nickel-plated layer.

As a preference, the brush assembly includes a brush holder that passes through the shaft core and rotates with it, and a brush fixed on the upper surface of the brush holder. The brush is in a closed ring structure as a whole. The half ring on one side is fixed on the brush holder, and the half ring on the other side protrudes to form a brush contact.

Furthermore, the lower end of the brush holder is the turning arm, and the turning arm is provided with a dial for turning the switch assembly.

As a preference, there are two switch terminals, and one of the switch terminals and the fixing column is an integrally formed structure of conductive metal; the switch assembly includes a metal toggle, a torsion spring and a conductive metal swing piece, One end of the oscillating piece and the toggle are hinged on the fixed column, and the two ends of the torsion spring are respectively hinged with the other end of the oscillating piece and the toggle; the rotating arm rotates with the shaft core and drives the dial The mover oscillates, so that the oscillating piece swings around the fixed column through the torsion spring, so that the oscillating piece is in contact with or disconnected from the switch terminal.

The beneficial effects are as follows: 1. The brush assembly is installed at the bottom of the carbon sheet base, compared with the structure in the prior art where the brush assembly is installed between the carbon sheet base and the shaft sleeve, the metal spacer material is omitted, Simplifies the installation steps and effectively reduces the product cost; 2. The switch housing integrates the switch terminal and the fixed column into one injection molding, which can achieve a fully-wrapped waterproof structure, which can not only achieve the waterproof effect of the switch part, but also save the housing, The multiple riveting and welding processes between the switch terminal and the fixed column reduce the product cost; 3. The integrated structure of the rotating arm and the brush assembly not only simplifies the installation of the potential part and the switching part, but also makes the rotating arm stronger Reliable, prolonging the service life of the potentiometer switch part.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

Fig. 1 is the decomposition structure schematic diagram of a kind of preferred implementation structure of potentiometer of the present utility model;

Fig. 2 is a sectional view of the structure of the switch housing in the embodiment;

Fig. 3 is the structure schematic diagram of brush assembly and rotating arm in the embodiment;

Figure 4 is a schematic view of the integrated structure of the brush holder and the rotating arm in the embodiment;

Fig. 5 is a schematic diagram of the structure of the shaft sleeve in the embodiment.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

Referring to Figures 1 to 5, a rotary potentiometer with a switch includes a shaft sleeve 1, a potential part 2 and a switch part 3 assembled in sequence, and a shaft core 4 passing through the axis lines of the above-mentioned parts; the shaft There is a rotation stop structure between the sleeve 1 and the shaft core 4; the potential part 2 includes a carbon base 21 and a brush assembly 22, the carbon base 21 has a downward opening accommodation space, and the top of the carbon base 21 is connected to the The bottom of the shaft sleeve 1 is connected and assembled, and the brush assembly 22 is penetrated on the shaft core 4 and assembled in the accommodation space at the bottom of the carbon base 21; the switch part 3 includes a rotating arm 31, a switch assembly and a switch housing 33; the switch housing The body 33 has an accommodation space that opens upwards, and the top of the switch housing 33 is engaged with the bottom of the carbon sheet base 21. The switch housing 33 is integrally injection-molded with a switch terminal 331 and a fixing column 332. The switch assembly is located in the switch housing 33. The rotating arm 31 is used to toggle the switch assembly and the rotating arm 31 is integrated with the brush assembly 22 . The brush assembly 22 is mounted on the bottom of the carbon sheet base 21. Compared with the structure in which the brush assembly is installed between the carbon sheet base and the shaft sleeve in the prior art, the metal spacer material is omitted, and the installation steps are simplified. The product cost is effectively reduced; the switch housing 33 integrally injects the switch terminal 331 and the fixing column 332 into a fully packaged waterproof structure, which can not only realize the waterproof effect of the switch part 3, but also save the housing, switch terminals and The multiple riveting and welding processes between the fixed columns reduce the product cost; the integral structure of the rotating arm 31 and the brush assembly 22 not only simplifies the installation of the potential part 2 and the switch part 3, but also makes the rotating arm 31 stronger Reliable, prolonging the service life of the potentiometer switch part.

As a preferred embodiment, the shaft sleeve 1 has an accommodating space that opens downward, and the rotation stop structure includes a stop piece 5 that passes through the shaft core 4 and rotates with it, and a stop piece 5 located on the shaft sleeve 1 The stop block 11 on the inner bottom of the accommodating space is limited to the stop piece 5; the position where the shaft sleeve 1 is in contact with the stop piece 5 is provided with an annular boss 12; the stop piece 5 is made of metal and at least in contact with the stop piece 5 The contact surface of the shaft sleeve 1 has a nickel-plated layer. Through the contact between the annular boss 12 and the stop piece 5, the contact surface is reduced, which can effectively prevent the stop piece 5 from being stuck due to being attached to the inner bottom surface of the shaft sleeve 1, and ensure the smooth twisting of the potentiometer And improve the reliability; the nickel-plated layer can effectively enhance the hardness of the stop piece 5, so that the stop force is doubled compared with ordinary zinc alloy, especially suitable for people with greater strength, such as fire officers and soldiers in the fire scene , the product must ensure sufficient reliability.

As a preference, the brush assembly 22 includes a brush holder 221 that is passed through the shaft core 4 and rotates with it, and a brush 222 fixed on the upper surface of the brush holder 221. The brush 222 is closed as a whole. Ring structure, one half ring of the brush 222 is fixed on the brush holder 221, and the other half ring protrudes to form a brush contact. Because the brush contact of the brush 222 is formed by protruding on the closed ring structure, the two sides of the contact are supported evenly, so even if it is used for a long time or under high pressure, it can always maintain contact with the contact. The carbon sheet is in close contact, and compared with the brush structure supported on one side in the prior art, the brush structure improves the stability of the potential adjustment of the potentiometer.

Furthermore, the lower end of the brush holder 221 is the turning arm 31, and the turning arm 31 is provided with a dial 311 for turning the switch assembly. The integral structure of the rotating arm 31 and the brush holder 221 simplifies the installation of the potentiometer on the one hand, and improves the overall rigidity on the other hand. The rotating arm 31 is not easy to break and damage when the switch assembly is toggled for a long time or vigorously. reliability of the switch unit.

As a preference, there are two switch terminals 331, and one of the switch terminals 331 and the fixed column 332 is an integrally formed structure of conductive metal; the switch assembly includes a metal toggle 321, a torsion spring 322 and a conductive The metal swing piece 323, one end of the swing piece 323 and the toggle 321 are all hinged on the fixed post 332, and the two ends of the torsion spring 322 are respectively hinged with the other end of the swing piece 323 and the toggle 321; The arm 31 rotates with the shaft core 4 and drives the toggle 321 to swing, so that the swing piece 323 swings around the fixed column 332 through the torsion spring 322, so that the swing piece 323 contacts or disconnects from the switch terminal 331 . One of the switch terminals 331 and the fixed column 332 are integrally formed with a metal structure, and then the switch terminal 331 and the fixed column 332 are integrally injection molded with the switch housing 33. Such a process structure allows the switch housing 33 to be injection molded into a waterproof structure, which can effectively Water ingress inside the switch assembly is protected; multiple processes of riveting and welding the switch terminal, the fixing column and the switch housing in the prior art are also omitted, which simplifies production and reduces costs. The toggle 321 is preferably made of metal, which can further improve the reliability of the switch assembly.

The above description does not limit the technical scope of the present utility model. Any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still belong to the scope of the technical solution of the present utility model.

Claims (5)

1. a kind of rotating potentiometer of belt switch, it is characterised in that：Including axle sleeve, current potential portion and the switch portion assembled successively, And it is arranged in the shaft core of axial line；

Rotation chocking construction is equipped between axle sleeve and shaft core；

Current potential portion includes carbon plate pedestal and brush assembly of electric, and carbon plate pedestal has downwardly open accommodation space, carbon plate pedestal top It is connected assembling with axle sleeve bottom, brush assembly of electric is arranged in shaft core and is assemblied in the accommodation space of carbon plate base bottom；

Switch portion includes cursor, switch module and switch case；Switch case has the accommodation space of upward opening, and switchs The top of housing is connected assembling with the bottom of carbon plate pedestal, and switch case integrated injection molding has switch terminal and fixed column, Switch module is located in the accommodation space of switch case and is articulated in fixed column, and cursor is used for toggle switch component and rotation Arm is structure as a whole with the brush assembly of electric.

2. a kind of rotating potentiometer of belt switch according to claim 1, it is characterised in that：The axle sleeve has downward The accommodation space of opening, the rotation chocking construction include the stop tab for being arranged in the shaft core and rotating with it and are located at To the scotch of stop tab limiting on bottom in the accommodation space of axle sleeve；The position contacted on axle sleeve with stop tab is equipped with annular Boss；Stop tab is metal material and the face that at least contact with axle sleeve is with nickel coating.

3. a kind of rotating potentiometer of belt switch according to claim 1, it is characterised in that：The brush assembly of electric includes It is arranged in the brush holder in the shaft core and rotated with it and is fixed on the brush of brush holder upper surface, brush is on the whole in closure Loop configuration, the side semi-ring of brush are fixed on brush holder, and opposite side semi-ring convexes to form brush contact.

4. a kind of rotating potentiometer of belt switch according to claim 3, it is characterised in that：The lower end of the brush holder As described cursor, the cursor are equipped with group point for stirring the switch module.

5. a kind of rotating potentiometer of belt switch according to claim 1, it is characterised in that：The switch terminal has two It is a, and one of switch terminal and the fixed column are conductive metal integrated formed structure；The switch module includes metal The swing piece for stirring son, torsional spring and conductive metal, swing one end of piece and stir son and be articulated in the fixed column, torsional spring Both ends respectively with swinging the other end of piece and to stir son hinged；The cursor rotates with the shaft core and drives described stir Son is swung, and so as to make swing piece around fixed column beat by torsional spring, is contacted or is disconnected with the switch terminal so as to swing piece.