CN2270318Y - Light-operated swith for railway train dispatchering radio station - Google Patents

Abstract

The utility model relates to a light-operated switch for the railway dispatchering radio station, which belongs to the improvement of the present light-operated switch. The utility model is composed of a switch body, a circuit board, a leading-out wire, etc., wherein, the top part of the switch body is provided with a semicircular notch, both ends of the notch are provided with two symmetrical windows, an emission phototube is installed in one window, and a receiving photoelectric triode which is matched with the emission phototube is installed in the other window. A received photoelectric signal is utilized to control the teamwork of two electronic switches after the photoelectric signal is amplified by a triode, and the light-operated switch is connected with a mechanical contact of a control switch of the radio station by using the leading-out wire of the switch. The utility model has the advantages of convenient operation, no mechanical contact abrasion, long service life, reliable action, etc.

Description

The railway train dispatchering radio station light-operated switch

The utility model is a kind of improvement to light-operated switch, is specially adapted to the transmitting-receiving control switch of railway train dispatchering radio station.

The hand-held transmitting-receiving control of holding key of existing railway train dispatchering radio station is to adopt mechanical switch, because use is frequent, mechanical contact damages easily and causes the wireless train dispatchment radio communication disruption, directly influences railway operation safety.

The purpose of this utility model is to overcome the shortcoming that existing railway train dispatchering radio station control switch mechanical contact damages easily, the contactless light-operated switch that provides a kind of suitable railway train dispatchering radio station to use.

The technical solution of the utility model is to realize like this, the light-operated switch that a kind of railway train dispatchering radio station uses is by switch body, wiring board, compositions such as lead-out wire, its special character is that half garden shape notch is arranged at the switch body top, the two ends of notch have 2 symmetrical windows, a window is equipped with emission phototube, another window is equipped with the reception phototriode with its pairing, the photosignal that receives is 2 electronic switch coordinations of control after triode amplifies, light-operated switch is connected on the mechanical contact of radio station control switch by the switch lead-out wire, with light-operated switch control radio station work, all electronic original parts are all installed in the circuit board.

The utility model compared with prior art has easy to operate, does not have mechanical contact wear, long service life, advantages such as reliable in action.

Now describe the utility model most preferred embodiment in conjunction with the accompanying drawings in detail:

Fig. 1 is railway train dispatchering radio station light-operated switch front view;

Fig. 2 for railway train dispatchering radio station with light-operated switch-side view;

Fig. 3 is railway train dispatchering radio station light-controlled switching circuit figure.

A kind of railway train dispatchering radio station light-operated switch such as Fig. 1,2, shown in 3, it is by switch body 1, wiring board 2, lead-out wire 3 is formed, half garden shape notch 6 is arranged at the top of switch body 1, the two ends of notch 6 have two symmetrical windows 4,5, a window 4 is equipped with emission phototube D, another window 5 is equipped with and receives phototriode BG1, the light signal that emission phototube D sends is received to become after phototriode BG1 receives and is the signal of telecommunication control electronic switch T1 and T2 coordination after triode BG2 amplifies, light-operated switch is connected on the mechanical contact K1 of radio station control switch by switch lead-out wire 3, on the K2, with light-operated switch control radio station work.Emission phototube D in the circuit adopts the LTE204 photoelectric tube, receiving phototriode BG1 adopts germanium infrared receiving tube, triode BG2 to adopt the 3DG6 silicon triode, electronic switch T1 adopts NE555P type integrated circuit chip, electronic switch T2 adopts T1L117 type integrated circuit chip, and all these electronic original parts all are installed on the wiring board 2.

The circuit working principle of light-operated switch: control the change of input 2,6 current potentials of electronic switch T1 with the change that receives phototriode BG1 emitter current potential, output 3 level of electronic switch T1 are changed, current potential with the terminal 3 control of Electric potentials electronic switch T2 inputs 2 of electronic switch T1,4,5 resistances of T2 output are changed, reach the control radio station and send the purpose of words path blockade, control closing of radio station transmission channel with output 7 potential change of electronic switch T1 simultaneously.

The course of work of light-operated switch is as follows: the radio station is in accepting state and closes transmission channel at ordinary times, there is not object in switch body 1 first garden shape notch 6, be contained in the emission phototube D emission infrared ray on the window 4, shine on the reception phototriode BG1 that is contained on the window 5, the BG1 conducting is risen triode BG2 base potential, the BG2 conducting, electronic switch T1 input 4,8 terminal current potentials reduce, input 6,2 terminal current potentials also reduce, these two conditions make electronic switch T1 output 3 level raise the output 4 of electronic switch T2,5 are high resistant, are equivalent to K2 and disconnect, K2 is the mechanical contact that the device loop is repeatedly talked about in the radio station, and the disconnection of K2 disconnects the transmitter loop.7 ends of electronic switch T1 are high potential to 1 end simultaneously, are equivalent to K1 and disconnect, and K1 is the mechanical contact of radio station transmission channel, and K1 disconnects transmission channel is closed.When the radio station need send, operating personnel will hold key and pick up, finger enters in the half garden shape notch 6 of light-operated switch, the ray to reception phototriode BG1 by emission phototube D is caught in screening, and BG1 is ended, and triode BG2 ends, output 3 level of electronic switch T1 reduce, make that resistance reduces the key the mike loop between 4,5 terminals of electronic switch T2,7 terminal potentials of electronic switch T1 reduce and make transmission channel open-minded simultaneously, and the radio station is in transmit status.

Claims (2)

1, a kind of railway train dispatchering radio station light-operated switch, be by switch body, wiring board, compositions such as lead-out wire, it is characterized in that: half garden shape notch is arranged at the switch body top, the two ends of notch have 2 symmetrical windows, a window is equipped with emission phototube, another window is equipped with the reception phototriode with its pairing, the photosignal that receives is 2 electronic switch T1 of control after triode amplifies, the T2 coordination, light-operated switch is connected on the mechanical contact of radio station control switch by the switch lead-out wire, with light-operated switch control radio station work, all electronic original parts are all installed in the circuit board.

2, light-operated switch according to claim 1 is characterized in that: electronic switch T1 adopts NE555P type integrated circuit chip, and electronic switch T2 adopts T1L117 type integrated circuit chip.

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