CN220064215U

CN220064215U - Single-ended alternating current test pencil with conductive contact body

Info

Publication number: CN220064215U
Application number: CN202321636916.7U
Authority: CN
Inventors: 曾宇; 张大妹; 黄少贞; 黄志刚; 陈志宏; 曾繁建
Original assignee: Zhangzhou Eastern Intelligent Meter Co ltd
Current assignee: Zhangzhou Eastern Intelligent Meter Co ltd
Priority date: 2023-06-26
Filing date: 2023-06-26
Publication date: 2023-11-21
Anticipated expiration: 2033-06-26

Abstract

The utility model relates to a single-ended alternating current test pencil with a conductive contact body, which comprises a metal test pencil head, an LED illuminating lamp, a pencil body, a liquid crystal display, a power button, a function switching button and a contact body made of a conductive material, wherein the metal test pencil head is provided with a plurality of conductive electrodes; the utility model discloses a pen body, including metal survey pencil point and LED light, metal survey pencil point and LED light fixed mounting are in the top of pen body, the contact body that is the recess form is installed respectively to the both sides of pen body, LCD, power button and function switching button are fixed mounting in the front end of pen body in proper order from last down.

Description

Single-ended alternating current test pencil with conductive contact body

Technical Field

The utility model relates to a single-ended alternating current test pencil with a conductive contact body, and belongs to the technical field of alternating current measuring equipment.

Background

In daily life and work, we often need to measure ac voltage to ensure safe use of the electrical equipment. The traditional test pencil needs to be connected with a live wire and a ground wire respectively by two meter pens for measurement, and when the test pencil is used, two hands are needed for operation, so that the operation is relatively complicated, and the test pencil is large in size and inconvenient to carry. In order to simplify the measurement process and improve the measurement accuracy, the utility model provides a single-end contact type test pencil with a contact body, which can solve the problems in the prior art.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a single-ended alternating current test pencil with a conductive contact body.

The technical scheme of the utility model is as follows:

a single-ended alternating current test pencil with conductive contact bodies comprises a metal test pencil head, an LED illuminating lamp, a pencil body, a liquid crystal display, a power button, a function switching button and contact bodies made of conductive materials; the utility model discloses a pen body, including metal survey pencil point and LED light, metal survey pencil point and LED light fixed mounting are in the top of pen body, the contact body that is the recess form is installed respectively to the both sides of pen body, LCD, power button and function switching button are fixed mounting in the front end of pen body in proper order from last down.

Preferably, the pen further comprises a buzzer, wherein the buzzer is arranged on a circuit board inside the pen body.

Preferably, the contact bodies at two sides of the pen body are respectively connected with the ground end of the circuit board inside the pen body through two springs.

Preferably, the contact comprises a contact or an encapsulated material formed by mixing TPE and carbon black conductive material.

The utility model has the following beneficial effects:

1. the utility model can directly measure the alternating voltage existing in the circuit through one test pencil head, and compared with the circuit voltage measurement carried out by two test pencil heads required in the prior art, the utility model has the advantage that the measuring process is simpler and more convenient.

2. The single-end test pencil with the contact body establishes electrical connection between the human body and the ground through the contact body, so that the human body and the ground are at the same potential, and when the voltage exists in the circuit to be tested, the electric signal can be obtained in the measuring circuit.

3. The utility model has small volume and is easy to carry and use.

Drawings

FIG. 1 is an overall block diagram of the present utility model;

FIG. 2 is an internal block diagram of the present utility model;

FIG. 3 is a functional block diagram of the present utility model;

the reference numerals in the drawings are as follows:

1. a metal pencil point; 2. an LED illuminating lamp; 3. a pen body; 4. a liquid crystal display; 5. a contact body; 6. a power button; 7. a function switching button; 8 a buzzer; 9. a circuit board; 10. and (3) a spring.

Detailed Description

The utility model will now be described in detail with reference to the drawings and to specific embodiments.

As shown in fig. 1, the single-ended ac test pencil with conductive contact body of the present embodiment includes a metal test pencil head 1, an LED lighting lamp 2, a pencil body 3, a liquid crystal display 4, a power button 6, a function switching button 7, and a contact body 5 made of a conductive material; the metal pencil head 1 and the LED illuminating lamp 2 are fixedly arranged at the top end of the pencil body 3, the two sides of the pencil body 3 are respectively provided with a groove-shaped contact body 5, and the liquid crystal display 4, the power button 6 and the function switching button 7 are sequentially and fixedly arranged at the front end of the pencil body 3 from top to bottom.

In the implementation, the metal test pencil head 1 is a metal pole piece and is used for contacting the alternating current on the socket pole piece, and is also a non-contact alternating current induction head, and the metal pole piece is connected with a measuring circuit on the internal circuit board; the LED illuminating lamp 2 is used for illumination when the sight line is unclear, and the power button 6 on the body is used for controlling the starting and stopping of the measuring circuit on the internal circuit board and the switching of the LED illuminating lamp 2; the function switching button 7 is used for realizing the switching function between three modes of non-contact alternating voltage detection and contact alternating voltage detection in a measurement state and on-off measurement; the liquid crystal display 4 is used for displaying the measurement result;

the contact body 5 serves to keep the body at the same potential as the ground, since the body is a less conductive substance, but in some cases, such as when walking on carpets, the body may accumulate an electrical charge. If the body is not grounded, these charges cannot be released, which can put our body in a high potential state. When the metal contact points at the two ends of the test pencil body are touched by hands, the body and the ground are in electrical connection, that is, the body and the ground are at the same potential.

The test pencil has two modes of non-contact alternating voltage detection and contact alternating voltage detection, when the test pencil approaches to the circuit for non-contact alternating voltage detection, if voltage exists in the circuit, induced current can flow through the measurement circuit instead of human body, so that when a user touches a contact point on a contact body 5 of the test pencil by hand, signals can be obtained from the test pencil effectively, unstable factors of measurement signals are reduced, and accuracy of measurement results is improved. If the metal contact point is not touched by hand, the readings may deviate.

When the probe contacts the conductor in the circuit to detect the contact alternating voltage, the probe can sense the change of the electric field through the capacitive coupling between the tested circuit and the test pencil. Because the voltage of alternating current constantly changes between positive and negative values, an electric field can be generated, the intensity of the electric field changes along with the change of the voltage, the MCU can calculate the alternating voltage value by calculating and measuring the change of the voltage, meanwhile, the frequency in an alternating current circuit can also be detected, the calculated result is sent to a liquid crystal for display through a liquid crystal driving chip, an audible and visual alarm prompt is given through a buzzer and an LED illuminating lamp when needed, and the working principle of the measuring circuit is shown as a figure 3.

Further, the pen also comprises a buzzer 8, and the buzzer 8 is arranged on a circuit board 9 inside the pen body 3.

In specific implementation, the alarm of the buzzer 8 is controlled by presetting a threshold value, and the buzzer 8 alarms when the voltage or current detected by the measuring circuit exceeds the threshold value.

Further, the contact bodies 5 at two sides of the pen body 3 are respectively connected with the ground end of the circuit board 9 inside the pen body 3 through two springs 10.

In practice, the contact body 5 and the internal circuit board 9 are connected as shown in fig. 2.

Further, the contact 5 comprises a contact or an encapsulation material formed by mixing TPE and carbon black conductive material.

In practice, the contact body 5 is made of different materials according to the actual use requirements.

The working principle of the utility model is as follows:

the metal test pencil head is contacted with or approaches to the circuit to be tested, induced voltage or current is generated on the measuring circuit of the circuit board in the test pencil, and the human body and the ground are kept at the same potential through the contact body, so that the induced voltage or current is ensured to be only generated in the measuring circuit, the human body is not damaged, meanwhile, the unstable factors of the measuring signal are reduced, the accuracy of the measuring result is improved, and the contact body is required to be contacted with by hands when the measurement is carried out.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The single-ended alternating current test pencil with the conductive contact body is characterized by comprising a metal test pencil head (1), an LED illuminating lamp (2), a pencil body (3), a liquid crystal display (4), a power button (6), a function switching button (7) and a contact body (5) made of a conductive material; the utility model discloses a metal test pencil head (1) and LED light (2) fixed mounting are in the top of pen body (3), contact body (5) that are the recess form are installed respectively to the both sides of pen body (3), liquid crystal display (4), power button (6) and function switch button (7) are fixed mounting in the front end of pen body (3) in proper order from last down.

2. Single-ended ac test pencil with conductive contacts according to claim 1, characterized in that it further comprises a buzzer (8), said buzzer (8) being mounted on a circuit board (9) inside the pencil body (3).

3. Single-ended ac test pencil with conductive contacts according to claim 2, characterized in that the contacts (5) on both sides of the pencil body (3) are connected to the ground of the circuit board (9) inside the pencil body (3) by two springs (10) respectively.

4. Single-ended ac test pencil with conductive contact according to claim 1, characterized in that the contact (5) comprises a contact or is encapsulated with TPE and carbon black conductive material.