CN114002623A

CN114002623A - Test pen for measuring on-off of circuit

Info

Publication number: CN114002623A
Application number: CN202111447630.XA
Authority: CN
Inventors: 肖国伟; 吕旗; 张百根; 樊天河; 宋卫红; 贺建伟
Original assignee: China Tobacco Henan Industrial Co Ltd
Current assignee: China Tobacco Henan Industrial Co Ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-02-01

Abstract

The application discloses test pen of measurement circuit break-make, including insulating casing and hou gai, it is provided with the socket to cover after, the socket is connected with plug detachably, the plug links to each other with the crocodile clamp, be provided with first spring in the insulating casing, first spring one end links to each other with the hou gai, the other end links to each other with the button cell negative pole, the button cell positive pole pass through the second spring respectively with first, second current-limiting resistor links to each other, the one end that the second spring was kept away from to first current-limiting resistor links to each other with emitting diode's negative pole, the one end that the second spring was kept away from to second current-limiting resistor links to each other with bee calling organ's negative pole, the anodal back that connects in parallel with the test contact of emitting diode's positive pole and bee calling organ links to each other, the front end of test contact is the contact, the contact stretches out insulating casing is in order to be used for the test. The test pen for measuring the on-off of the line can respectively adopt the audible and visual alarm device to prompt when the line or the circuit is tested on-off, only adopts the resistance element in the shunt branch, and is simple in structure and convenient to operate.

Description

Test pen for measuring on-off of circuit

Technical Field

The invention relates to the technical field of circuit testing, in particular to a test pen for measuring the on-off of a circuit.

Background

At present, the known test pencil structure is formed by connecting a test contact, a current-limiting resistor, a neon tube, a metal spring and a hand contact electrode in series. When the object to be measured has relatively high voltage, the neon tube is lighted to indicate that the object to be measured is charged. However, many main devices for measuring the on-off of the circuit adopt a universal meter for measurement, and the universal meter is inconvenient to carry, generally only has the alarm function of a buzzer, but does not have an electricity testing device which can be directly judged and observed by eyes. The on-off of the detection circuit is difficult, and error judgment is easy to cause.

Therefore, it is urgently needed to design a test pen capable of meeting the requirements.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a test pen for measuring the on-off of a line, which overcomes the defects in the prior art, and the test pen not only can measure whether a measured object is electrified, but also is a tool which can conveniently distinguish the on-off alarm of the line and carry out luminous flicker by a light-emitting diode.

The technical problem to be solved by the invention is realized by the following technical scheme:

a test pen for measuring on-off of a line comprises an insulating shell and a rear cover, wherein a socket is arranged on the rear cover and detachably connected with a plug, and one end, far away from the socket, of the plug is connected with an alligator clip; the testing device is characterized in that a first spring is arranged in the insulating shell, one end of the first spring is connected with the rear cover, the other end of the first spring is connected with the negative electrode of the button cell, the positive electrode of the button cell is connected with a first current-limiting resistor and a second current-limiting resistor through a second spring respectively, one end of the second spring is far away from the first current-limiting resistor and is connected with the negative electrode of the light-emitting diode, one end of the second spring is far away from the second current-limiting resistor and is connected with the negative electrode of the buzzer, the positive electrode of the light-emitting diode and the positive electrode of the buzzer are connected with the rear end of the testing contact in parallel, the front end of the testing contact is a contact, and the contact stretches out of the insulating shell for testing.

Preferably, in the above technical solution, the second spring is connected to the first current limiting resistor and the second current limiting resistor connected in parallel through the insulating isolation layer.

Preferably, in the above technical solution, one end of the plug, which is far away from the socket, is connected with the alligator clip through a wire.

Preferably, in the above technical solution, one end of the first spring, which is far away from the button battery, is connected to the socket.

Preferably, in the above technical solution, the diameter of the insertion opening is 3.5 mm.

Preferably, in the above technical solution, the contact of the test contact is detachably provided with a pen cap.

Preferably, in the above technical solution, the insulating housing and the rear cover are rotatably connected.

The technical scheme of the invention has the following beneficial effects:

the test pen for measuring the on-off of the line can respectively adopt the audible and visual alarm device to prompt when the line or the circuit is tested on-off, only adopts the resistance element in the shunt branch, and has simple structure and convenient operation.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic diagram of a test pen for measuring on/off of a line according to the present application.

Fig. 2 is a schematic circuit diagram of the test pen for measuring on/off of a line according to the present application.

Reference numerals: 1-test contact, 2-insulating shell, 3-crocodile clip, 4-lead, 5-plug, 6-rear cover, 7-first spring, 8-button battery, 9-second spring, 10-insulating isolation layer, 11-buzzer, 12-first current-limiting resistor, 13-light-emitting diode and 14-second current-limiting resistor.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

As shown in fig. 1 and 2, the test pen for measuring the on-off of the line comprises an insulating shell 2 and a rear cover 6. The following details:

a first spring 7 is arranged in the insulating shell 2, one end of the first spring 7 is connected with the rear cover 6, the other end of the first spring is connected with the negative electrode of the button cell 8, the positive electrode of the button cell 8 is respectively connected with a first current-limiting resistor 12 and a second current-limiting resistor 14 through a second spring 9, one end, far away from the second spring 9, of the first current-limiting resistor 12 is connected with the negative electrode of the light-emitting diode 13, one end, far away from the second spring 9, of the second current-limiting resistor 14 is connected with the negative electrode of the buzzer 11, the positive electrode of the light-emitting diode 13 is connected with the rear end of the test contact 1 after being connected in parallel with the positive electrode of the buzzer 11, the front end of the test contact 1 is a contact, and the contact extends out of the insulating shell 2 to be used for testing.

The rear cover 6 is provided with a socket (not shown) detachably connected to the plug 5. The end of the plug 5 away from the socket is connected with the alligator clip 3 through a wire 4. Preferably, the socket diameter is 3.5 mm. Of course, the present application is not limited thereto, and those skilled in the art can select a suitable socket size as required.

Further, the second spring 9 is connected with the first current limiting resistor 12 and the second current limiting resistor 14 after being connected in parallel through the insulating isolation layer 10.

Further, the end of the first spring 7 away from the button cell 8 is connected to the socket.

Further, a pen cap is detachably provided on the contact of the test contact 1.

Further, the insulating housing 2 is rotatably connected to the rear cover 6.

When the device of this application is used:

when the circuit is to be tested whether on-off, the alligator clip 3 clamps one end of the lead 4, and the front end (testing end) of the testing contact 1 is used for touching the other end of the lead 4, so that if the lead is conducted, a loop is formed, and the buzzer 11 and the light-emitting diode 13 simultaneously buzze and light to emit light. The measurement of seeing with ears, smells and eyes is achieved.

If the circuit on the measuring circuit board is switched on or off, the crocodile clip 3 is clipped to the public grounding end of the circuit board, the line measurement is carried out by the measuring contact, the line measurement can be carried out step by step, and the measuring circuit board is very suitable for measuring low-resistance electrical equipment such as safety resistor, inductance, fuse tube and the like on the circuit board.

Although the present invention has been described with reference to the above embodiments, it should be understood that the present invention is not limited thereto, and various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

Claims

1. A test pen for measuring the on-off of a line is characterized by comprising an insulating shell (2) and a rear cover (6),

a socket is arranged on the rear cover (6), the socket is detachably connected with a plug (5), and one end, far away from the socket, of the plug (5) is connected with the crocodile clip (3);

a first spring (7) is arranged in the insulating shell (2), one end of the first spring (7) is connected with the rear cover (6), the other end of the first spring (7) is connected with the negative electrode of the button cell (8), the anode of the button cell (8) is respectively connected with a first current-limiting resistor (12) and a second current-limiting resistor (14) through a second spring (9), one end of the first current limiting resistor (12) far away from the second spring (9) is connected with the cathode of a light emitting diode (13), one end of the second current limiting resistor (14) far away from the second spring (9) is connected with the negative electrode of the buzzer (11), the anode of the light emitting diode (13) is connected with the anode of the buzzer (11) in parallel and then is connected with the rear end of the test contact (1), the front end of the test contact (1) is a contact which extends out of the insulating shell (2) for testing.

2. The test pen for measuring the on-off of the line according to claim 1, characterized in that the second spring (9) is connected with the first current limiting resistor (12) and the second current limiting resistor (14) after being connected in parallel through an insulating isolation layer (10).

3. The test pen for measuring the on-off of the line according to claim 1, wherein one end of the plug (5) far away from the socket is connected with the alligator clip (3) through a lead (4).

4. The test pen for measuring the on-off of the line according to claim 3, characterized in that the end of the first spring (7) far away from the button cell (8) is connected with the jack.

5. The test pen for measuring on/off of line according to claim 4, wherein the diameter of the socket is 3.5 mm.

6. The test pen for measuring the on-off of the line according to claim 1, characterized in that a pen cap is detachably arranged on the contact of the test contact (1).

7. Test pen for measuring the make-and-break of a line according to claim 1, characterized by a rotatable connection between the insulating housing (2) and the back cover (6).