CN201796667U

CN201796667U - Rotary carbon diaphragm potentiometer

Info

Publication number: CN201796667U
Application number: CN2010205398506U
Authority: CN
Inventors: 蒋明义
Original assignee: NINGBO HUAYU ELECTRONIC CO Ltd
Current assignee: NINGBO HUAYU ELECTRONIC CO Ltd
Priority date: 2010-09-20
Filing date: 2010-09-20
Publication date: 2011-04-13
Anticipated expiration: 2020-09-20

Abstract

The utility model discloses a rotary carbon diaphragm potentiometer, which belongs to a basic electric element and is mainly arranged in a circuit and used for adjusting the magnitude of a voltage value. The rotary carbon film potentiometer comprises a carbon diaphragm and a rotating system, wherein the rotating system comprises a pedestal; the carbon diaphragm is connected with the pedestal; and an insulating section is paved on the carbon diaphragm, and the insulating section is close to the opening of the carbon diaphragm. The rotary carbon diaphragm potentiometer can realize disconnection between a second leading-out end and a first leading-out end and between the second leading-out end and a third leading-out end in the absence of an external switch so as to bring great convenience to the use of users.

Description

Rotary carbon-film potentiometer

Technical field:

The utility model relates to a kind of essential electronic element, specifically is a kind of rotary carbon-film potentiometer.

Background technology:

Potentiometer is to have three exits (lug plate), resistance can be by the resistive element of certain Changing Pattern adjusting, it is made up of carbon film plate (resistive element) and rotation system usually, rotation system comprises pedestal and a dial rotating shaft, the dial rotating shaft is rotatably connected on the pedestal, carbon film plate is the annular that has opening, the opening two ends of carbon film plate are connected with two exits (being respectively first exit and three terminal) with pedestal respectively by rivet, a contact spring (brush) is sliding on the carbon film plate, this contact spring is connected with second exit by the connection banking stop of riveting on the pedestal, and contact spring is riveted in the dial rotating shaft.When adding a voltage between first exit that connects when the carbon film plate two ends and the three terminal, change the position of contact spring on carbon film plate by the rotating driver plate rotating shaft, just can obtain a magnitude of voltage that becomes certain relation with the contact spring position between second exit and first exit or the three terminal.Owing to always be between first exit that second exit in the above-mentioned potentiometer is connected with the carbon film plate two ends and the three terminal and be in conducting state, if the user need disconnect second exit, usually all need an external switch to realize this function, and can cause the inconvenience of use like this.

The utility model content:

The technical problems to be solved in the utility model is, provides a kind of and need not under the situation of outside connected switch, just can realize that second exit and first exit and three terminal disconnect, thus the convenient rotary carbon-film potentiometer that uses.

Technical solution of the present utility model is that a kind of rotary carbon-film potentiometer with following structure is provided: comprise carbon film plate and rotation system, rotation system comprises pedestal, carbon film plate is connected with pedestal, wherein, be covered with one deck insulating segment on the carbon film plate, insulating segment is near the carbon film plate opening part.

Rotary carbon-film potentiometer described in the utility model wherein, can be provided with the thin film sheet between carbon film plate and the pedestal.

After adopting above structure, compared with prior art, the rotary carbon-film potentiometer of the utility model has the following advantages: owing to be covered with one deck insulating segment on the carbon film plate, therefore, when the user need disconnect second exit, can directly contact spring be rotated to the insulating segment place, so just, can be with second exit and first exit and three terminal disconnection, play the effect of switch, when disconnecting second exit, there is not outside connected switch just because of the rotary carbon-film potentiometer of the utility model, therefore, the rotary carbon-film potentiometer of the utility model greatly facilitates user's operation.

Diaphragm the effect of mainly playing insulation is set.

Description of drawings:

Fig. 1 is that the master of the rotary carbon-film potentiometer of the utility model looks the sectional structure schematic diagram;

Fig. 2 is the left TV structure schematic diagram when removing decapsidate, dial rotating shaft and contact spring among Fig. 1;

Fig. 3 is that the master when the dial rotating shaft is connected with contact spring among Fig. 1 looks the structure for amplifying schematic diagram;

Fig. 4 is the right TV structure schematic diagram of Fig. 3.

Embodiment:

Below in conjunction with the drawings and specific embodiments the rotary carbon-film potentiometer of the utility model is described in further detail:

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, in this embodiment, the rotary carbon-film potentiometer of the utility model comprises case 2, carbon film plate 13, first exit 15, three terminal 12, second exit 10, connects banking stop 1 and rotation system.Rotation system comprises pedestal 9 and dial rotating shaft 3, dial rotating shaft 3 is positioned at the through hole at pedestal 9 middle parts and is rotatably connected by through hole and pedestal 9, case 2 is connected on the pedestal 9, carbon film plate 13 is the annular that has opening, be provided with thin film sheet 11 between carbon film plate 13 and the pedestal 9, opening one end of carbon film plate 13 is connected with first exit 15 with pedestal 9 by rivet, the opening other end of carbon film plate 13 is connected with three terminal 12 with pedestal 9 by rivet, be covered with one deck insulating segment 14 on the carbon film plate 13, insulating segment 14 is near carbon film plate 13 opening parts, second exit 10 is between first exit 15 and three terminal 12, second exit 10 be connected banking stop 1 by rivet on pedestal 9, contact spring 4 by rivet in dial rotating shaft 3, the contact, outer ring 16 of contact spring 4 is pressed on the surface of carbon film plate 13, the inner ring contact 17 of contact spring 4 is pressed on the surface that connects banking stop 1, be with a packing ring 8 on the pedestal 9 and be connected with clamp nut 7 in turn and clamp nut 6, chucking has a collar 5 in the dial rotating shaft 3.

The operation principle of the rotary carbon-film potentiometer of the utility model is: when adding a voltage between first exit 15 that connects when carbon film plate 13 two ends and the three terminal 12, change the position of contact spring 4 on carbon film plate 13 by rotating driver plate rotating shaft 3, between second exit 10 and first exit 15 or second exit 10 and three terminal 12, just can wait until a magnitude of voltage that becomes certain relation with contact spring 4 positions.

Claims

1. rotary carbon-film potentiometer, comprise carbon film plate (13) and rotation system, described rotation system comprises pedestal (9), described carbon film plate (13) is connected with pedestal (9), it is characterized in that: be covered with one deck insulating segment (14) on the described carbon film plate (13), described insulating segment (14) is near carbon film plate (13) opening part.

2. rotary carbon-film potentiometer according to claim 1 is characterized in that: be provided with thin film sheet (11) between described carbon film plate (13) and the pedestal (9).