CN205080190U - Digital display test pencil - Google Patents

Abstract

The utility model discloses a digital display electric measuring pen, which comprises a main body of the electric pen which is composed of a front cover and a back cover; a probe is arranged at the front end of the main body of the electric pen; an insulating sheet is also included; The circuit board inside the main body of the electric pen is connected; a positive contact piece and a negative contact piece are provided at the tail end of the circuit board, and two batteries are arranged on the positive contact piece and the negative contact piece; There are lighting lamps, a lighting switch for controlling the lighting lamps, a display screen for displaying measurement results, and an indicator light for displaying the working status of the electric measuring pen; a slot is provided at the position opposite to the middle of the two batteries on the back cover, and the The insulating sheet is placed in the slot and extends into the middle of the two batteries, so that the positive contact piece and the negative contact piece are in a power-off state. The utility model adopts the insulating sheet to insulate the two batteries to ensure the electric quantity of the electric measuring pen when it is not in use, and solves the problem that the battery cannot be used normally due to the loss of the electric quantity of the battery and the replacement of the battery.

Description

digital display test pen

technical field

The utility model relates to an electric measuring pencil, in particular to a digital display electric measuring pencil.

Background technique

The digital display test pen is a kind of test pen, which belongs to the electrical and electronic tools, and is used to test whether the wire is charged. The pen body of the digital display test pen has a display screen, which can intuitively read the test voltage number.

When measuring the live wire, the lighting circuit has a voltage of about U=220V between the live wire and the ground. The resistance of the human body is generally small, usually only a few hundred to a few thousand ohms, and the internal resistance of the electric test pen is usually about several megohms. The current (that is, the current passing through the human body) is very small, usually less than 1 milliampere. When such a small current passes through the human body, it will not harm people, and when such a small current passes through the neon bulb of the test pen, the neon bulb will emit light. .

If the existing digital display test pen is not used for a long time, or when it is in a state to be sold, the power of the battery inside it will be lost, resulting in the failure of the normal use of the test pen.

Utility model content

The purpose of the utility model is to solve the problems in the prior art, and provide a digital display electric pen.

The technical scheme of the utility model is: a digital display electric pen, including a main body of the electric pen which is composed of a front cover and a back cover; a probe is arranged at the front end of the main body of the electric pen; The circuit boards inside the main body of the electric pen are connected; the tail end of the circuit board is provided with a positive contact piece and a negative contact piece, and the positive contact piece and the negative contact piece are provided with two batteries; the front cover is provided with a lighting lamp , a lighting switch for controlling the lighting lamp, a display screen for displaying measurement results, and an indicator light for displaying the working state of the electric measuring pen; an insulating sheet is also included; a slot is provided at the position opposite to the middle of the back cover and the two batteries , the insulating sheet is placed in the slot and extends into the middle of the two batteries, so that the positive contact piece and the negative contact piece are in a power-off state.

Preferably, the battery is a button battery.

Preferably, a pen holder is provided on the back cover.

Preferably, the illuminating light is an LED light, which is arranged at the tail end of the probe.

Preferably, the lighting switch is located behind the lighting lamp; behind the lighting switch are an indicator light and a display screen in sequence.

Preferably, an inductive detection button and a direct detection button are sequentially provided behind the display screen.

Preferably, the display screen is a liquid crystal display screen.

The utility model has the following beneficial effects:

1. Use an insulating sheet to insert between the two batteries for insulation, to ensure that the test pen has sufficient power when it is not in use, and solve the problem that it cannot be used normally due to the loss of battery power;

2. Detect AC and DC voltage, and display the test range on the display screen in a segmented manner;

3. It has the functions of checking the connection and disconnection of various home appliance wires, distinguishing the zero-phase line and finding the breakpoint, which is convenient for engineering construction to check the line, and can also detect the power status of the battery;

4. Equipped with a lighting function, it is convenient to find the line in a dark environment, and it can also be used as a flashlight for emergency use;

5. With a blue display screen design, even in the darkest environment, it can be clearly seen;

6. It adopts a pen clip, which can be inserted into the pocket and is easy to carry.

Description of drawings

Fig. 1 is the front view of the utility model;

Fig. 2 is the rear view of the utility model;

Fig. 3 is a schematic diagram of the internal structure of the utility model;

Fig. 4 is the structural representation of the back cover of the utility model;

Fig. 5 is a schematic diagram of the structure of the insulating sheet in the present invention.

detailed description

In order to make the technical means, technical features, purpose of the utility model and technical effect of the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific illustrations.

As shown in Figure 1 and Figure 2, it is a digital display electric pen of the present invention, which includes a main body 10 of the electric pen consisting of a front cover 1 and a rear cover 2 interlocked between the front cover 1 and the rear cover 2 A hollow chamber is formed.

A probe 3 is provided at the front end of the electric pen main body 10, and the probe 3 is used to contact with the component to be tested. A circuit board 4 is arranged in the hollow chamber, and the probe 3 is connected to the circuit board 4 . A positive electrode contact piece 41 and a negative electrode contact piece 42 are arranged at the tail end of the circuit board 4 , and two batteries 5 for powering the entire circuit board 4 are arranged between the positive electrode contact piece 41 and the negative electrode contact piece 42 .

The front cover 1 is provided with a lighting lamp 11, a lighting switch 12 for controlling the opening and closing of the lighting lamp 11, an indicator light 13 for displaying the working state of the electric measuring pen, and a liquid crystal display 14 for displaying measurement results; preferred lighting in the present embodiment The lamp 11 is an LED lamp, which is arranged at the head end of the electric pen main body 10 and the tail end of the probe 3 . The lighting switch 12 of the present utility model is located at the rear of the lighting lamp 11; behind the lighting switch 12 are an indicator light 13 and a liquid crystal display 14 in sequence.

At the back of the liquid crystal display screen 14, an inductive detection button 15 and a direct detection button are sequentially arranged. 16.

As shown in Figure 5, the utility model also includes an insulating sheet 6; a slot 61 is provided at a position opposite between the rear cover 2 and the two batteries 5, and the insulating sheet 6 is placed in the slot 61 and extends Into the middle of the two batteries 5, so that the positive electrode contact piece 41 and the negative electrode contact piece 42 are in a power-off state, referring to FIG. 3 . As shown in Fig. 4, a pen holder 21 is provided on the back cover 2, which can be inserted into a pocket and is easy to carry.

After all parts are assembled, the electric measuring pen of the present utility model inserts the insulating sheet 6 in the slot 61, so that the two batteries 5 are in an insulating state, so that the whole circuit board 4 is in a power-off state. In the state of not using the test pen or waiting for sale, the power of the two batteries 5 will not be lost, so as to ensure that the power of the two batteries 5 is in a normal use state. It solves the problem that the electric measuring pen cannot be used due to insufficient battery power, reduces the number of battery replacements, and saves the internal power of the battery.

In summary, the above are only preferred embodiments of the present utility model, and are not intended to limit the implementation scope of the present utility model. That is, all equivalent changes and modifications made according to the patent scope of the utility model should belong to the technical category of the utility model.

Claims (7)

1. numerical monitor test pencil, comprises one and mutually fastens by protecgulum and bonnet the electroprobe main body formed; A probe is provided with in the front end of described electroprobe main body; It is characterized in that: also comprise an insulating trip; Described probe connects with the circuit board being placed in described electroprobe body interior; Be provided with positive pole contact and negative pole contact at the tail end of described circuit board, described positive pole contact and negative pole contact are provided with two batteries; Be covered with illuminating lamp before described, control the light switch of described illuminating lamp, the pilot lamp of the display screen of display measurement result and display test pencil duty; Lid is provided with a slot with the right position of described two battery mesophase spherule in the rear, and described insulating trip to be placed in this slot and to stretch in the middle of two batteries, makes positive pole contact and negative pole contact be in off-position.

2. numerical monitor test pencil according to claim 1, is characterized in that: described battery is button cell.

3. numerical monitor test pencil according to claim 1, is characterized in that: be covered with pen clip in the rear.

4. numerical monitor test pencil according to claim 1, is characterized in that: described illuminating lamp is LED, is located at the tail end of described probe.

5. the numerical monitor test pencil according to claim 1 or 4, is characterized in that: described light switch is positioned at the rear of described illuminating lamp; Pilot lamp and display screen is followed successively by the rear of described light switch.

6. numerical monitor test pencil according to claim 5, is characterized in that: be provided with induction test button and direct-detection button successively at the rear of described display screen.

7. numerical monitor test pencil according to claim 6, is characterized in that: described display screen is LCDs.