High-safety electrical measuring instrument

Abstract

The utility model discloses a high safety electrical measuring instrument, comprising a universal meter body, the universal meter body is provided with a display screen, a measuring range switch, a positive electrode joint and a negative electrode joint, the positive electrode joint and the negative electrode joint are connected with corresponding meter pen assemblies through electric wires, each meter pen assembly comprises a housing, and the housing is provided with a wire. One end of the shell is connected with an electric wire, the other end of the shell is provided with a baffle ring, and a telescopic assembly is arranged in the shell. Through the action of the telescopic assembly in the inner shell, the pen holder for measurement is always located in the shell when the pen holder is not used, and when the pen holder is used, the two pressing blocks of the telescopic assembly must be pinched and pressed by hands all the time to enable the pen holder to extend out for use, so that when the pen holder is in contact with a circuit, fingers need to press the pressing blocks all the time and cannot touch the pen holder; and therefore, the use safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical instruments, and in particular relates to a high-safety electrical measuring instrument. Background Art

[0002] An electrical measuring instrument is a common electronic measuring instrument, also known as a multimeter, multitester, or multimeter. It is a multifunctional instrument that can measure electrical parameters such as voltage, current, and resistance. It typically consists of a digital display, a rotary selector switch, a measuring plug, and measuring leads. The user selects the desired measurement parameter and range using the rotary switch, then inserts the measuring plug into the measurement circuit and connects the measuring leads to the desired measurement points.

[0003] The patent with announcement number CN216963423U discloses a multimeter for fire safety. The fire meter protective cover can effectively protect the device to avoid the risk of damage when the device is subjected to force. The fire meter protective cover that can be slidably installed can facilitate the installation and removal of the fire meter protective cover, thereby facilitating the use of the fire meter protective cover; the line storage disc wheel can be used to coil and store the line, thereby facilitating the use of the line; the line buckle can be used to hang the line, which plays a certain limiting role on the line, thereby facilitating the use of the line.

[0004] When using a multimeter, a worker needs to insert a measuring plug into a measuring circuit so that the multimeter body can read various electrical values through the measuring plug. However, the insertion end of the measuring plug is usually an exposed metal rod. When using the device in the above scheme, if the worker's finger accidentally touches the metal rod when inserting the measuring plug into the circuit, an electric shock accident may easily occur, which is not conducive to improving its safety.

[0005] Therefore, it is necessary to provide a high-safety electrical measuring instrument to solve the above problems. Utility Model Content

[0006] Technical problem solved: In response to the above technical problems, the utility model provides a high-safety electrical measuring instrument. When in use, you must pinch and press the two pressing blocks of the telescopic assembly with your hands to extend the pen shaft for use. In this way, when the pen shaft contacts the circuit, your fingers need to keep pressing the pressing blocks and cannot touch the pen shaft, thereby improving safety during use.

[0007] Technical solution: A high-safety electrical measuring instrument, comprising a multimeter body, the multimeter body being provided with a display screen, a range switch, a positive connector and a negative connector, the positive connector and the negative connector being connected to corresponding test pen assemblies through wires, the test pen assembly comprising a shell, one end of the shell being connected to the wire, and the other end being provided with a retaining ring, a telescopic assembly being provided in the shell, the telescopic assembly comprising a pen holder, one end of the pen holder being a conical head, and the other end being provided with a tail plug, a fixing block, an inner shell and a fixing rod being provided in sequence on the pen holder between the conical head and the tail plug, a telescopic spring being provided on the pen holder in the inner shell, a limiting ring being provided between the telescopic spring and the upper surface of the bottom of the inner shell, the fixing block being provided with a matching pressing block, the pressing block passing through the side wall of the shell, one end of the fixing rod being connected to the abutting groove of the pen holder, and the other end being connected to the wire.

[0008] Preferably, a plurality of protective components are provided on the electric wires.

[0009] Furthermore, the protection assembly includes a mounting ring, a protective ring and an abutment block. Several through holes are opened on the side wall of the mounting ring. One end of the abutment block abuts against the wire, and the other end passes through the through hole to be connected to the protective ring. The protective ring is arranged on the outer side wall of the mounting ring.

[0010] Preferably, an anti-slip ring is provided on the outer side wall of the shell.

[0011] Preferably, the anti-slip ring is a rubber ring.

[0012] Preferably, a sliding groove is provided on the fixing block, and a sliding block is provided on the pressing block, and the sliding block is slidably connected to the sliding groove.

[0013] Preferably, the side surfaces of the fixing block and the pressing block that are close to each other are both inclined surfaces.

[0014] Beneficial effect: The utility model is a highly safe electrical measuring instrument. Through the force of the telescopic spring inside the inner shell, the measuring pen holder will always be located inside the shell when not in use. When in use, it is necessary to pinch and press the two pressing blocks with hands to extend the pen holder for use. In this way, when the pen holder contacts the circuit, the fingers need to keep pressing the pressing blocks and cannot touch the pen holder, thereby improving safety during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a high-safety electrical measuring instrument of the utility model;

[0016] Figure 2 This is a partial structural diagram of a high-safety electrical measuring instrument of the present utility model;

[0017] Figure 3This is a schematic diagram of the exploded structure of the test lead assembly of the utility model;

[0018] Figure 4 This is a schematic diagram of the exploded structure of the telescopic component of the utility model;

[0019] Figure 5 This is a schematic diagram of the explosion structure of the protection component of the utility model;

[0020] Serial number in the picture:

[0021] 1. Multimeter body,

[0022] 2. Display screen,

[0023] 3. Range switch,

[0024] 4. Positive terminal,

[0025] 5. Negative terminal,

[0026] 6. Wires,

[0027] 7. Protection assembly, 71. Mounting ring, 72. Guard ring, 73. Abutment block,

[0028] 8. Test lead assembly, 81. Housing, 82. Retaining ring, 83. Anti-slip ring,

[0029] 9. Telescopic assembly, 91. Pen barrel, 92. Pressing block, 93. Fixed block, 94. Fixed rod, 95. Tail plug, 96. Inner shell, 97. Telescopic spring, 98. Limiting ring, 99. Slider. DETAILED DESCRIPTION

[0030] The technical solution of the present utility model is further described in detail below with reference to the accompanying drawings. Example 1

[0031] Reference Figure 1-Figure 5A high-safety electrical measuring instrument includes a multimeter body 1, on which is provided a display screen 2 (displaying the measured value), a range switch 3 (by rotating different gears, the values of different intervals can be measured), a positive terminal 4 and a negative terminal 5, the positive terminal 4 and the negative terminal 5 are both connected to the corresponding test lead assembly 8 through a wire 6, the test lead assembly 8 includes a shell 81, one end of the shell 81 is connected to the wire 6, and the other end is provided with a retaining ring 82 (the retaining ring 82 can block the user's hand, further increasing safety), a telescopic assembly 9 is provided in the shell 81, and the telescopic assembly 9 includes a pen holder 91, one end of the pen holder 91 is a conical head (for easy insertion into the circuit), and the other end is provided with a tail plug 95, the pen holder 9 between the conical head and the tail plug 95 1 is provided with a fixing block 93, an inner shell 96 and a fixing rod 94 in sequence. A telescopic spring 97 is provided on the pen body 91 in the inner shell 96. A limiting ring 98 is provided between the telescopic spring 97 and the upper surface of the bottom of the inner shell 96. The two fixing blocks 93 in opposite directions are provided with matching pressing blocks 92. The pressing blocks 92 pass through the side wall of the shell 81. A sliding groove is provided on the fixing block 93. A slider 99 is provided on the pressing block 92. The slider 99 is slidably connected to the sliding groove; the side surfaces of the fixing block 93 and the pressing block 92 that are close to each other are both inclined surfaces. One end of the fixing rod 94 is connected to the abutting groove of the pen body 91, and the other end is connected to the electric wire 6. When the pressing block 92 is pushed inward, the pressing block 92 will squeeze the fixing block 93, so that the fixing block 93 drives the pen body 91 to move outward.

[0032] The above-mentioned electric wire 6 is sleeved with several protection components 7, and the protection components 7 include a mounting ring 71, a protective ring 72 and an abutment block 73. The side wall of the mounting ring 71 is provided with several through holes. One end of the abutment block 73 abuts against the electric wire 6 (for increasing friction so that the protection component 7 sleeved on the outer periphery of the electric wire 6 is not easy to slide), and the other end passes through the through hole to be connected with the protective ring 72. The protective ring 72 is arranged on the outer wall of the mounting ring 71. Through the isolation effect of the protective ring 72, the contact friction between the electric wire 6 and the outside world can be reduced, thereby increasing the service life of the electric wire 6, and preventing the electric wire 6 from breaking and leaking electricity, further improving its safety.

[0033] Anti-slip rings 83 arranged at equal intervals are provided on the outer side wall of the housing 81 to increase friction and improve the grip. The anti-slip rings 83 are rubber rings.

[0034] When the user uses the meter, he first needs to adjust the range switch 3 to the corresponding gear, and then he can pick up the test pen assembly 8 with both hands, and pinch the pressing block 92 on the test pen assembly 8 with both hands. When the pressing block 92 is pinched and pushed inward, the pressing block 92 will squeeze the fixed block 93, so that the fixed block 93 drives the pen shaft 91 to move outward. Since the user needs to keep pressing the pressing block 92 to make the pen shaft 91 extend outward, the user's fingers will not touch the pen shaft 91 when the pen shaft 91 contacts the circuit, thereby improving safety during use. At the same time, the fixed rod 94 abuts against the abutment groove on the pen shaft 91, so that the pen shaft 91 remains connected to the wire 6 when it is moving. When the user lets go, the pen shaft 91 will automatically retract due to the force of the telescopic spring 97.

[0035] The embodiments of this specific implementation method are all preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. A high-safety electrical measuring instrument, characterized by: The multimeter comprises a body, on which a display screen, a range switch, a positive terminal and a negative terminal are provided. The positive terminal and the negative terminal are connected to corresponding test lead assemblies through wires. The test lead assembly comprises a housing, one end of which is connected to the wire and the other end of which is provided with a retaining ring. A telescopic assembly is provided in the housing. The telescopic assembly includes a pen shaft, one end of which is a conical head and the other end is provided with a tail plug. A fixing block, an inner shell and a fixing rod are sequentially provided on the pen shaft between the conical head and the tail plug. A telescopic spring is provided on the pen shaft in the inner shell, and a limiting ring is provided between the telescopic spring and the upper surface of the bottom of the inner shell. The fixing block is provided with a matching pressing block, which passes through the side wall of the shell. One end of the fixing rod is connected to the abutting groove of the pen shaft, and the other end is connected to the electric wire.

2. A high-safety electrical measuring instrument according to claim 1, characterized in that: A plurality of protection components are sleeved on the electric wires.

3. A high-safety electrical measuring instrument according to claim 2, characterized in that: The protection assembly includes a mounting ring, a protective ring and an abutment block. A plurality of through holes are opened on the side wall of the mounting ring. One end of the abutment block abuts against the wire, and the other end passes through the through hole and is connected to the protective ring. The protective ring is arranged on the outer side wall of the mounting ring.

4. A high-safety electrical measuring instrument according to claim 1, characterized in that: An anti-slip ring is provided on the outer side wall of the shell.

5. A high-safety electrical measuring instrument according to claim 4, characterized in that: The anti-slip ring is a rubber ring.

6. A high-safety electrical measuring instrument according to claim 1, characterized in that: The fixing block is provided with a sliding groove, and the pressing block is provided with a sliding block, and the sliding block is slidably connected with the sliding groove.

7. The high-safety electrical measuring instrument according to claim 1, characterized in that: The sides of the fixing block and the pressing block that are close to each other are both inclined surfaces.

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