CN2066990U

CN2066990U - Rotary automobile electricity test pen

Info

Publication number: CN2066990U
Application number: CN 90203410
Authority: CN
Inventors: 程火良; 王振东
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-03-23
Filing date: 1990-03-23
Publication date: 1990-12-05

Abstract

The utility model relates to a rotary automobile electricity test pen which belongs to automobile electronic equipment. The low voltage test pencil in prior art can only measure AC power current, can not display the electric voltage number value of the tested point and is not applicable for automobile circuits. The utility model is characterized in that after the plastic handle of the prior test pencil is provided with the core of the test pencil circuit, the number value having or not having the electric voltage and the electric voltage can be simulated and displayed in use in order to judge the operating status of the automobile circuit, such as normal, under-voltage, broken circuit, etc.

Description

Rotary automobile electricity test pen

Belong to the vehicle electronics class.

Existing low pressure electroscope can only detect the low-voltage alternating-current electric current, and can not show the magnitude of voltage of measured point.Inapplicable for automobile circuit.

The purpose of this utility model is to check that certain point has or not DC voltage in the automobile circuit, and measures numerical value roughly, so that judge that its duty is normal, under-voltage, open circuit etc., search fault.

The technical solution of the utility model is that the handle of moulding at screw assemblage is embedded in a microprinted circuit fuse, the positive pole of circuit (or negative pole) touches on the swing arm that revolves tool by stage clip, negative pole (or anodal) and the copper jackscrew of moulding handle tail end band wiring ring join, during use the swing arm head is contacted the measured point, swing handle tail end wiring ring is received on the circuit common ground point by the lead-in wire of hairtail folder, and the interior luminotron of observation swing handle is bright or do not work, reach bright spot number, the duty that can judge automobile circuit and trouble spot.

Fig. 1 is the structural representation of test pencil, and it is to be become by: swing arm 1, chuck 2, stage clip 3, P.e.c. core 4, swing handle jackscrew 5, the hollow utmost points such as handle 6, fish folder 7, light emitting diode 8 of moulding.

Fig. 2 is the circuit of test pencil, and 12 volts of test pencils are made up of four (or below four) parallel branches, when voltage reaches 8,10,12,14 volts (error ± 1 volt) respectively.Light emitting diode luminous in succession (demonstration bright spot) in each branch road.It is 16,18,20,22,24 volts (error ± 1 volt) that 24 volts of test pencils can reach five branch roads, sequence of light.Prop up way and be no more than changeable under the situation of the upper limit.

Claims

1, a kind of with car electronic tool-rotary type automobile test pencil.Show that by the hollow handle, swing arm, divided voltage moulded printed circuit board (PCB) core, swing handle jackscrew constitute.It is characterized in that:

A, be embedded in a divided voltage in parallel at hollow plastic handle and show the printed circuit board (PCB) core;

B, voltage display circuit are to serve as the demonstration light-emitting component by the crystallo-luminescence diode, and the crystal voltage stabilizing diode serves as the series and parallel circuit (branch road parallel connection, element connected in series) that sectional pressure element and resistance serve as current limiting element;

C, 12 volts of test pencils at most by four parallel branches form, 24 volts of test pencils can reach five parallel branches, in a way of the following changeable electroprobe of upper limit circuit.