High-voltage test accessory

Abstract

The utility model relates to a high-voltage test accessory, which is suitable for a test meter and comprises a shell and a PCB (printed circuit board), the PCB is packaged in the shell, the PCB is at least provided with a high-voltage resistor for decomposing and reducing high voltage within 10000V into safe voltage lower than 24V, an input terminal suitable for a meter pen to insert and a test plug bush suitable for being inserted into a test meter jack of the test meter. When a high voltage is tested, the test plug bush is inserted into the voltage test jack of the test meter, the high voltage is decomposed and reduced through the high voltage test accessory, and at the moment, the voltage entering the test meter is a low voltage which is subjected to safe voltage reduction processing through the high voltage test accessory. The voltage from the high voltage within 10,000 volts (10,000 volts) to the input end of the test meter after passing through the high-voltage test accessory is a safe voltage lower than 24 volts. Therefore, the test meter does not need to bear damage of high voltage to the machine core, the meter is prevented from being burnt out in the high-voltage test process, the risk of high-voltage electric shock of operators is reduced, and the safety and reliability of high-voltage test of the test meter are improved.

Description

Technical Field

[0001] The utility model belongs to the field of test table testing, and in particular relates to a high-voltage test accessory. Background Art

[0002] At present, there are high-voltage testers on the market that can test more than 10,000V. When performing high-voltage tests above 10,000V, the high voltage is directly input into the tester movement from the input terminal jack through the test lead. However, the test process has the following problems:

[0003] (1) The circuit of the test meter movement must be protected against the high voltage it is subjected to (to avoid burning out). If the circuit protection is not provided or the protection is unreliable, the test meter will be burned out. (2) Operators using this test meter will be at risk of high voltage electric shock. (3) If the structural shell of the test meter does not reach the IP65 protection level, the risk of burning out or electric shock will increase when used outdoors or in a humid environment. Utility Model Content

[0004] The utility model aims to provide a high voltage test accessory to overcome the above technical defects.

[0005] In order to solve the above technical problems, the utility model provides a high voltage test accessory suitable for a test meter, including:

[0006] case;

[0007] A PCB board is encapsulated in the shell, and the PCB board has at least a high-voltage resistor to decompose and step down a high voltage within 10000V into a safe voltage lower than 24V, as well as an input terminal suitable for inserting a test lead, and a test socket suitable for inserting into a test meter jack of the test meter.

[0008] According to a high voltage test accessory, the housing comprises:

[0009] The same surface of the upper cover extends in the same direction to form a terminal plug hole suitable for being mounted on the input terminal;

[0010] The lower cover is buckled on the upper cover, and the buckling position is sealed. After buckling, a cavity suitable for accommodating the PCB board is formed. The lower cover is provided with a test socket for the test socket to pass through.

[0011] According to a high voltage test accessory, the PCB board has at least two parallel and opposite planes, which are:

[0012] a first plane on which the high voltage resistor and the input terminal are mounted;

[0013] The second plane is provided with the test plug sleeve installed thereon.

[0014] According to a high-voltage test accessory, a sealing ring is provided at the joint between the root of the input terminal and the terminal socket, and at the joint between the root of the test socket and the test socket.

[0015] According to a high voltage test accessory, the PCB board is also provided with:

[0016] A conductive tube seat is placed in the test socket. The conductive tube seat is connected to the PCB board, with the proximal end close to the PCB board as the proximal end. The proximal end of the conductive tube seat maintains sealed contact with the root of the test socket.

[0017] According to a high voltage test accessory, the number of the input terminals is the same as the number of the terminal jacks and corresponds to each other;

[0018] The number of the test sockets is the same as the number of the test jacks and corresponds to each other.

[0019] The utility model proposes a high-voltage test accessory, which is used to equip a test meter with the function of safely testing high voltages above 1000V. When testing high voltage, the high-voltage test accessory is inserted into the voltage test jack of the test meter, and the high voltage is first decomposed and reduced by the high-voltage test accessory. At this time, the voltage entering the test meter is a low voltage after the high-voltage test accessory has been safely reduced, that is, the voltage within 10,000 volts (10,000V) passes through the high-voltage test accessory and reaches the input terminal of the test meter, which is a safe voltage lower than 24V.

[0020] The high-voltage test accessories meet the IP65 safety protection level, and the high-voltage protection is safe and reliable.

[0021] The high-voltage test accessory proposed by the utility model enables the test meter to test high voltage without enduring and preventing damage to the movement of the high voltage, thereby reducing costs and avoiding burning of the instrument during the high-voltage test process, and also reducing the risk of high-voltage electric shock to operators, thereby improving the safety and reliability of the high-voltage test of the test meter.

[0022] In order to make the above contents of the present invention more clearly understood, preferred embodiments are given below and described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of high voltage test accessories.

[0024] Figure 2 It is an exploded view of the structure of the high voltage test accessories.

[0025] Figure 3 It is an application diagram of the high voltage test accessory when it is inserted into the test meter.

[0026] Figure 4 This is a cross-section of a high voltage test accessory. Figure 1 .

[0027] Figure 5 This is a cross-section of a high voltage test accessory. Figure 2 .

[0028] Description of reference numerals:

[0029] 100. High voltage test accessories;

[0030] 110. upper cover; 111. terminal socket;

[0031] 120, PCB board; 121, input terminal; 122, test socket; 123, high voltage resistor; 124, sealing ring; 125, conductive tube socket;

[0032] 130, lower cover; 131, test jack;

[0033] 200, test meter; 210, test meter socket. DETAILED DESCRIPTION

[0034] The following is an explanation of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0035] It should be noted that, in the present utility model, the top, bottom, left and right in the figure are deemed to be the top, bottom, left and right of the high-voltage test accessory described in this specification.

[0036] The exemplary embodiments of the present invention are now introduced with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0037] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0038] This embodiment relates to a high voltage test accessory, suitable for testing meter 200, please refer to Figure 1 and Figure 3 The high voltage test accessory 100 includes a housing and a PCB board 120 .

[0039] See also Figure 2 The PCB board 120 is encapsulated in the shell, and the PCB board 120 has at least a high-voltage resistor 123 to decompose the high voltage within 10000V into a safe voltage lower than 24V, as well as an input terminal 121 suitable for inserting a test lead, and a test socket 122 suitable for inserting into the test meter jack 210 of the test meter 200.

[0040] The high voltage signal of the input terminal 121 is weakened by the high voltage resistor 123, and the weakened voltage signal is converted to the test meter 200 through the test socket 122, thereby converting the high voltage signal into a low voltage signal, thereby achieving personal safety and instrument self-protection during high voltage measurement.

[0041] High voltage resistor 123 is the most commonly used component in electronic circuits. It is mainly used as a voltage divider and discharge resistor in high voltage devices. High voltage resistor 123 refers to a resistor that works under high voltage of 1000~35000 volts, with a resistance of up to 1011 ohms. Therefore, high voltage resistors can withstand very high voltages.

[0042] Please continue reading Figure 2 The housing includes an upper cover 110 and a lower cover 130, and the specific structure is as follows:

[0043] (1) The same surface of the upper cover 110 extends in the same direction to form a terminal plug hole 111 suitable for being mounted on the input terminal 121. Figure 2 The direction shown is for reference. The lower surface of the upper cover 110 extends vertically downward to form a terminal insertion hole 111 , and the test lead passes through the terminal insertion hole 111 and is inserted into the input terminal 121 .

[0044] (2) The lower cover 130 is buckled with the upper cover 110, and the buckling part is sealed. After buckling, a cavity suitable for accommodating the PCB board 120 is formed. The lower cover 130 is provided with a test socket 131 for the test socket 122 to pass through. The test socket 122 passes through the test socket 131 and is inserted into the test socket 210 of the test meter 200. That is, the test socket 122 is plugged into and out of the test socket 210 to connect the test meter 200 to transmit signals.

[0045] In some embodiments, the upper cover 110 and the lower cover 130 are formed from a molded shell of high impact hard plastic.

[0046] The components required for the operation of the high voltage test accessory 100 are mounted on a PCB (circuit board) 120 , and various parts of the PCB 120 are wrapped by an upper cover 110 and a lower cover 130 to reduce the influence of interference on the operation of the high voltage test accessory 100 .

[0047] Please continue reading Figure 2The PCB board 120 has at least two parallel and opposite planes, namely: a first plane on which a high-voltage resistor 123 and an input terminal 121 are mounted; and a second plane on which a test socket 122 is mounted.

[0048] That is, the input terminal 121 and the test socket 122 are mounted on opposite sides of the PCB board 120 .

[0049] In some embodiments, please combine Figure 2 , Figure 4 and Figure 5 The joints between the root of the input terminal 121 and the terminal plug hole 111, and the joints between the root of the test plug sleeve 122 and the test plug hole 131 are all equipped with sealing rings 124. When the upper cover 110 and the lower cover 130 are sealed and buckled, there are still unsealed parts at the openings of the upper cover 110 and the lower cover 130, that is, the joints between the root of the input terminal 121 and the terminal plug hole 111, and the joints between the root of the test plug sleeve 122 and the test plug hole 131. In order to ensure that the PCB board 120 and the components (such as the high-voltage resistor 123) installed thereon are isolated from moisture and other pollutants in the external environment, sealing rings 124 are installed at the root of the input terminal 121 and the root of the test plug sleeve 122.

[0050] The root portion refers to an end close to the PCB board 120 .

[0051] In some embodiments, the sealing ring 124 is rubber.

[0052] A conductive tube holder 125 is also provided on the PCB board 120 . The conductive tube holder 125 is placed in the test socket 122 . The conductive tube holder 125 is connected to the PCB board 120 , with the proximal end close to the PCB board 120 as the proximal end. The proximal end of the conductive tube holder 125 maintains sealed contact with the root of the test socket 122 .

[0053] The conductive tube holder 125 is molded in the test socket 122, and the root metal end of the conductive tube holder 125 is disposed on the PCB board 120. Figure 4 It can be seen that the proximal end of the conductive tube holder 125 and the root of the test socket 122 maintain sealed contact, so that the conductive tube holder 125 can not only achieve circuit conduction, but also ensure the isolation of the PCB board 120 from the outside world, that is, the bottom of the conductive tube holder 125 is sealed so that moisture and other pollutants in the surrounding environment cannot penetrate at this position.

[0054] It should be noted here that a conductive tube seat 125 is also provided between the input terminal 121 and the PCB board 120 . The conductive tube seat 125 is provided on the PCB board 120 to conduct the input terminal 121 and the PCB board 120 , but is not marked in the drawings.

[0055] In some embodiments, the conductive socket 125 is made of metal such as brass.

[0056] In order to indicate the polarity of the jack, a colored socket can be pressed on the corresponding position before molding. For example, the test socket 122 can be formed of a non-conductive polymer in red or black as required.

[0057] The number of input terminals 121 is the same as the number of terminal sockets 111 and corresponds to each other; the number of test sockets 122 is the same as the number of test sockets 131 and corresponds to each other.

[0058] In some embodiments, there are two input terminals 121 , two terminal jacks 111 , two test sockets 122 , and two test jacks 131 .

[0059] like Figure 3 As shown, in actual use, the test socket 122 is inserted into the test meter jack 210, and is now electrically connected to the test meter. An appropriate test lead can be inserted into the terminal jack 111 to measure the voltage signal. The input voltage signal will pass through the high-voltage resistor 123 in this high-voltage test accessory 100 to convert the high voltage into a low-voltage output. At the same time, this high-voltage test accessory 100 is provided with a sealing ring 124 at the outer bottom of the input terminal 121 and the test socket 122, so that moisture and other pollutants in the surrounding environment cannot penetrate at this position, so that personal safety and the use of the instrument are guaranteed when testing high voltage.

[0060] When testing high voltage, insert the high voltage test accessory 100 into the test meter jack 210 of the test meter. The high voltage is first decomposed and reduced by the high voltage test accessory 100. The voltage entering the test meter is a low voltage after safe voltage reduction by the high voltage test accessory 100. For high voltage measurement within ten thousand volts (10,000V), the voltage reaching the input terminal of the test meter after passing through the high voltage test accessory 100 is a safe voltage lower than 24V.

[0061] The high-voltage test accessory 100 proposed in this embodiment can test high voltage without being damaged by high voltage. It can also prevent the instrument from being burned out during high-voltage testing. It also reduces the risk of high-voltage electric shock to operators and improves the safety and reliability of high-voltage testing of the test meter.

[0062] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A high voltage test accessory, suitable for a test meter (200), characterized in that: include: case; A PCB board (120) is encapsulated in the housing, the PCB board (120) having at least a high-voltage resistor (123) for decomposing a high voltage within 10,000V to a safe voltage below 24V, an input terminal (121) suitable for inserting a test lead, and a test socket (122) suitable for inserting into a test meter socket (210) of the test meter (200).

2. The high voltage test accessory according to claim 1, characterized in that: The housing comprises: The upper cover (110) has a same surface extending in the same direction to form a wiring terminal jack (111) suitable for being sleeved on the input terminal (121); The lower cover (130) is buckled on the upper cover (110) and the buckling portion is sealed. After buckling, a cavity suitable for accommodating the PCB board (120) is formed. The lower cover (130) is provided with a test socket (131) for the test socket (122) to pass through.

3. The high voltage test accessory according to claim 1 or 2, characterized in that: The PCB board (120) has at least two planes which are parallel and opposite to each other, namely: a first plane, on which the high-voltage resistor (123) and the input terminal (121) are mounted; A second plane, on which the test plug sleeve (122) is installed.

4. The high voltage test accessory according to claim 2, characterized in that: The joint between the root of the input terminal (121) and the wiring terminal jack (111), and the joint between the root of the test socket (122) and the test jack (131) are both provided with sealing rings (124).

5. The high voltage test accessory according to claim 3, characterized in that: The PCB board (120) is also provided with: A conductive tube seat (125) is placed in the test socket (122); the conductive tube seat (125) is connected to the PCB board (120) so as to be close to the PCB board (120) as a proximal end; the proximal end of the conductive tube seat (125) and the root of the test socket (122) maintain sealed contact.

6. The high voltage test accessory according to claim 2, characterized in that: The number of the input terminals (121) is the same as the number of the wiring terminal jacks (111) and corresponds to each other; The number of the test sockets (122) is the same as the number of the test sockets (131) and corresponds to each other.

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