CN2052125U - Multifunctional test pencil for vehicle - Google Patents

Abstract

The utility model relates to a multifunctional test pencil for vehicle belonging to an improvement to a test pencil, comprising a metal probe, an insulating casing, a pencil shank and a self-control circuit board which is arranged in the casing and is provided with a luminous display circuit and an oscillating acoustic circuit. The utility model is characterized in that the multifunctional test pencil for vehicle can qualitatively detect the capacity and the voltage of an accumulator, the multifunctional test pencil for vehicle can also detect on-off and the short circuit of a power utilized circuit and sent out light and noise simultaneously, and the multifunctional test pencil for vehicle also has the function of a screwdriver. The utility model has the advantages of simple structure, low cost, convenient portability, easy application and easy operation. The utility model is particularly suitable for use in the detect of various vehicles and is one of the mandatory tools of various vehicles.

Description

Multifunctional test pencil for vehicle

The utility model relates to the multi-functional electroscope of a kind of automobile, the improvement that belongs to electroscope is particularly suitable for detecting the voltage of all kinds of automobile storage batteries, whether capacity is in calibration range, each switching or short circuit with electric line, also can be used for the above-mentioned detection of other motor vehicles, therefore be all kinds of automobiles with one of indispensable instrument of car.

The accumulator used of automobile just added some distilled water on ordinary days in the past, replenishing the consumption of its evaporation, and as for the capacity of accumulator, whether voltage is at calibration range, then almost nobody shows any interest in, after using a period of time by rule of thumb, unload the charging of making a return journey, owing to lack easy detection means, often make accumulator be in user mode unreasonably, and scrap too early, so not only waste a large amount of stereotypes, but also caused economic loss; Especially automobile casts anchor suddenly in the way of travelling, searching reason to the driver fixes a breakdown and causes difficulty, it is the capacity of accumulator actually, undertension, still with due to the defect of electric line, usually use " sparking method " to judge roughly, although can finish above-mentioned detection task preferably with midget tester, but, can not be equipped with one by every chassis because the cost height carries inconvenience.Therefore, the problems referred to above cause numerous automobilists and repairmans' very big concern already, and look forward to having a kind of cost low, are easy to carry, the testing tool of simple and feasible comes out, to satisfy the detection needs in driving and the repair procedures.

The purpose of this utility model be to provide a kind of simple in structure, cost is low, easy operating easy to carry, capacity that can the qualitative detection accumulator, voltage can show switching or the short circuit with electric line again, sends the light and the sound simultaneously and has the multi-functional electroscope of automobile of screwdriver function concurrently.

The purpose of this utility model realizes by the following technical solutions, one end of metal probe 1 is embedded in 2 li of insulation crusts, put in its cavity and and link to each other with the positive pole of control circuit, control circuit board is loaded in the shell 2, luminous demonstration and oscillatory circuit are arranged on the circuit board, handle 3 is contained in the tail end of insulation crust 2, and fish head-clamp 4 links to each other with the negative pole of control circuit with lead by the end of a handle 3.

Described handle 3 is provided with light hole.

That the utility model compared with prior art has is simple in structure, cost is low, easy to carry, processing ease, the capacity of existing qualitative detection accumulator, voltage can show again with the switching of electric line or the function of short circuit, send the light and the sound simultaneously, have the function of screwdriver concurrently, implement to be beneficial to and to apply easily.

Fig. 1, the 2nd, structural representation of the present utility model.

Fig. 3 is circuit theory diagrams of the present utility model.

Embodiment of the present utility model is described in conjunction with the accompanying drawings, is embedded in 2 li of insulation crusts with conventional method processing metal probe 1 and with it, and an end puts in its cavity and links to each other with the positive terminal of the vibration sound and luminous display circuit, and control circuit board is loaded in it, and R is arranged on it ₁～R ₄Capacitor C ₁, two triode T ₁, T ₂With piezoelectric ceramic piece C ₀The vibration sound circuit of forming is with R ₅, voltage stabilizing diode D ₁With light emitting diode D ₂The luminous display circuit that serial connection forms; A handle 3 that has lightening hole is loaded on the afterbody of insulation crust 2, and fish head-clamp 4 links to each other with the negative pole end of lead with above-mentioned two circuit by the end of a handle 3.

When the utility model uses, realize by following program, during use, " connecing iron " of fish head-clamp 4 being clipped in automobile located, i.e. the negative terminal of accumulator contacts the anodal of accumulator with metal probe 1 or with the feeder ear of electric line, when both end voltage is equal to or greater than 99V, voltage stabilizing diode D ₁(generally getting about 7.5V) reverse breakdown has electric current to pass through, so light emitting diode D ₂Luminous, R meanwhile ₁, R ₃, R ₄After the dividing potential drop, at R ₃The two ends pressure drop is enough to make two triode T ₁, T ₂Emitter junction pass through R ₂, flow through electric current, but capacitor C ₁Both end voltage is zero, T ₁, T ₂End, along with capacitor C ₁Pass through R ₂, R ₁Continuation charging, make T later on when voltage reaches certain value ₁, T ₂R is flow through in conducting ₁On current surge, its pressure drop increases, R ₃, R ₄Dividing potential drop reduces, meanwhile C ₁Triode by conducting discharges rapidly, makes T again ₁, T ₂End rapidly, like this because C ₁Charging and discharging hockets, and causes T ₁T ₂The pipe conducting, by going round and beginning again vibration, the voltage that is added on the piezoelectric ceramic piece is a variation voltage, thereby make piezoelectric ceramic piece produce corresponding mechanical vibration and send the sound of corresponding frequencies, battery tension is described, normal with electric line, otherwise as battery tension deficiency (being lower than 9 volts) or electricity consumption line broken circuit, at this moment light emitting diode is not luminous, and piezoelectric ceramic piece C ₀Send the sound; If not only do not worked but also do not ring explanation electricity consumption line short, and then ascertain the reason respectively and fix a breakdown.

Claims (2)

1, the multi-functional electroscope of a kind of automobile, form by metal probe 1 and insulation crust 2, an end that it is characterized in that metal probe 1 is embedded in 2 li of insulation crusts and puts in its cavity, link to each other with the positive pole of control circuit, control circuit board is loaded in the shell 2, luminous demonstration and vibration sound circuit are arranged on the circuit board, and a handle 3 is contained in the tail end of insulation crust 2, and fish head-clamp 4 links to each other with the negative pole of control circuit with lead by the end road of a handle 3.

2, electroscope according to claim 1 is characterized in that described handle 3 is provided with light hole.