Voltage meter with power-off protection

Abstract

The utility model relates to the technical field of voltage meters, in particular to a voltage meter with power-off protection, which comprises an external component, a protection component is mounted in the external component, an inductor is arranged at the top of the protection component, an electromagnetic induction component is arranged at the top of the inductor, and a power-off protection component is arranged at the bottom of the electromagnetic induction component. An electromagnetic induction assembly is installed in the protective assembly, a pointer is installed at one end of the electromagnetic induction assembly, an internal power source is arranged at the top of the protective assembly, the external assembly comprises a device shell, a dial is installed outside the device shell, and a measuring port is formed below the dial. According to the improved voltage measuring meter, the power-off protection assembly is additionally arranged in the voltage measuring meter, power-off protection is carried out on internal assemblies when current is abnormal, the internal assemblies are prevented from being damaged, the normal use effect of the voltage measuring meter is kept, and meanwhile the heat dissipation opening is formed in the exterior of the voltage measuring meter to be matched with the heat dissipation fan to cool the interior; the influence of over-high temperature on the use of the voltage meter is avoided, and the measurement precision of the voltage meter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of voltage measuring meters, in particular to a voltage measuring meter with power-off protection. Background Art

[0002] A voltmeter is an instrument for measuring voltage. Its structure is mostly composed of permanent magnets, coils and other components. A voltmeter is a fairly large resistor, ideally considered to be an open circuit. It has a magnet and a wire coil inside. When current passes through it, the coil will generate a magnetic field. When the coil is energized, it will rotate under the action of the magnet, and then the voltage value can be obtained.

[0003] A common voltage meter connects the electrical component to be measured to the measuring port of the voltage meter, and obtains the voltage value of the electrical component by electromagnetically reacting the internal electromagnetic induction coil with the permanent magnet, driving the connected pointer to indicate on the dial.

[0004] In the process of realizing the utility model, the inventors found that the prior art had the following problems: 1. When using a voltage meter to measure voltage, the circuit cannot be powered off in time when the voltage is too large, resulting in damage to the components inside the instrument, thereby affecting the normal use of the voltage meter; 2. The internal temperature of the voltage meter will rise when used for a long time. Excessive temperature will cause the components inside the voltage meter to work abnormally, thereby affecting the measurement accuracy of the voltage meter. Utility Model Content

[0005] The purpose of the utility model is to provide a voltage measuring meter with power-off protection, so as to solve the problem that the voltage measuring meter proposed in the above background technology cannot timely perform power-off protection on the circuit when measuring due to excessive voltage, resulting in damage to the components inside the instrument, thereby affecting the normal use of the voltage measuring meter, and at the same time, the internal temperature of the voltage measuring meter will rise when it is running, and the excessively high temperature will cause the internal components of the voltage measuring meter to work abnormally, thereby affecting the measurement accuracy of the voltage measuring meter. To achieve the above purpose, the utility model provides the following technical solutions: a voltage measuring meter with power-off protection, comprising an external component, a protection component is installed inside the external component, an inductor is arranged on the top of the protection component, an electromagnetic induction component is arranged on the top of the inductor, a pointer is installed at one end of the electromagnetic induction component, and an internal power supply is arranged on the top of the protection component.

[0006] The external component includes a device shell, a dial is installed on the outside of the device shell, a measuring port is arranged below the dial, heat dissipation ports are penetrated on both sides of the device shell, a filter is installed inside the heat dissipation port, and a cooling fan is installed on the top of the device shell.

[0007] The protection component includes an insulating shell, docking seats are installed on both sides of the insulating shell, an electric telescopic component is installed on the top of the insulating shell, an extrusion plate is installed on the bottom of the electric telescopic component, a connecting block is installed on the bottom of the extrusion plate, one end of the connecting block is rotatably connected to one end of a connecting rod, the bottom of the connecting rod is rotatably connected to a docking head, and a connecting wire is plugged into one side of the docking head.

[0008] Further preferably, the heat dissipation openings are located at both sides of the bottom of the device housing, a filter is installed below the heat dissipation fan, and the heat dissipation fan is electrically connected to the internal power supply.

[0009] Further preferably, the pointer is installed on one end of the electromagnetic induction component to form a rotational connection structure with one side of the device housing, and one side of the pointer is attached to the outside of the dial.

[0010] Further preferably, there are two connecting rods, and the centers of the two connecting rods form a rotating connection structure through a rotating shaft arranged on one side.

[0011] Further preferably, there are two docking joints, and a sliding connection structure is formed with the inner wall of the insulating shell through a plug-in connection line, and the docking joint and the docking seat form a plug-in connection structure.

[0012] Further preferably, the internal power supply, the electric telescopic assembly and the sensor are all electrically connected.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] In the utility model, a power-off protection component is arranged in the internal measuring port of the voltage measuring meter. When the sensor senses the current abnormality, the power-off protection component is controlled to disconnect the circuit to protect the device as a whole, thereby avoiding damage to the internal components of the device caused by the current abnormality and improving the protection effect of the voltage measuring meter.

[0015] In the utility model, heat dissipation ports are arranged on both sides of the bottom of the device to cooperate with the heat dissipation fan on the top to dissipate the heat inside the voltage measuring meter. At the same time, a filter is arranged to prevent foreign matter and impurities from entering the interior of the voltage measuring meter, thereby maintaining the working stability of the internal components of the voltage measuring meter and improving the measurement accuracy of the voltage measuring meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the explosion structure of the external components of the utility model;

[0019] Figure 4 It is a schematic diagram of the explosion-enlarged structure of the protection component of the utility model.

[0020] In the figure: 1. External components; 101. Device housing; 102. Dial; 103. Measuring port; 104. Heat dissipation port; 105. Filter; 106. Cooling fan; 2. Protection components; 201. Insulating housing; 202. Docking station; 203. Electric telescopic component; 204. Extrusion plate; 205. Connecting block; 206. Connecting rod; 207. Docking head; 208. Connecting wire; 3. Sensor; 4. Electromagnetic induction component; 5. Pointer; 6. Internal power supply. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 4 The utility model provides a technical solution: a voltage measuring meter with power-off protection, comprising an external component 1, a protection component 2 is installed inside the external component 1, a sensor 3 is arranged on the top of the protection component 2, an electromagnetic induction component 4 is arranged on the top of the sensor 3, a pointer 5 is installed at one end of the electromagnetic induction component 4, and an internal power supply 6 is arranged on the top of the protection component 2.

[0023] The external component 1 includes a device housing 101, a dial 102 is installed on the outside of the device housing 101, a measuring port 103 is arranged below the dial 102, heat dissipation ports 104 are penetrated on both sides of the device housing 101, a filter 105 is installed inside the heat dissipation port 104, and a cooling fan 106 is installed on the top of the device housing 101.

[0024] The protection component 2 includes an insulating shell 201, and docking seats 202 are installed on both sides of the insulating shell 201. An electric telescopic component 203 is installed on the top of the insulating shell 201, an extrusion plate 204 is installed on the bottom of the electric telescopic component 203, and a connecting block 205 is installed on the bottom of the extrusion plate 204. One end of the connecting block 205 is rotatably connected to one end of a connecting rod 206, and the bottom of the connecting rod 206 is rotatably connected to a docking joint 207, and a connecting wire 208 is plugged into one side of the docking joint 207.

[0025] In this embodiment, Figure 2 and Figure 3As shown, the heat dissipation port 104 is located on both sides of the bottom of the device housing 101, and a filter 105 is installed below the heat dissipation fan 106, and the heat dissipation fan 106 is electrically connected to the internal power supply 6; by arranging heat dissipation components on both sides and the top of the device housing 101, the interior of the voltage measuring meter is dissipated to prevent the temperature of the internal components from being too high to affect the measurement accuracy, and the filter 105 is used to prevent foreign matter and impurities from entering the interior of the voltage measuring meter, thereby improving the working effect of the voltage measuring meter.

[0026] In this embodiment, Figure 1 and Figure 2 As shown, the pointer 5 is installed on one end of the electromagnetic induction component 4 to form a rotation connection structure with one side of the device housing 101, and one side of the pointer 5 is attached to the outside of the dial 102; the pointer 5 is driven to rotate on one side of the device housing 101 by electromagnetic reaction inside the electromagnetic induction component 4, and the dial 102 is used to display the numerical value, so as to facilitate the display of the voltage measurement data.

[0027] In this embodiment, Figure 2 and Figure 4 As shown, there are two connecting rods 206, and the centers of the two connecting rods 206 form a rotating connection structure through a rotating shaft set on one side; by rotating the centers of the two connecting rods 206, the two ends of the two connecting rods 206 are driven to move outward during the downward pressing of the electric telescopic component 203 on the top, so as to control the connection and disconnection of the line and improve the control effect of the line connectivity.

[0028] In this embodiment, Figure 4 As shown, there are two docking joints 207, and a sliding connection structure is formed with the inner wall of the insulating shell 201 through the plug-in connecting wire 208, and the docking joint 207 and the docking seat 202 form a plug-in connection structure; the two docking joints 207 are pushed to slide on the bottom of the insulating shell 201 through the bottom of the two connecting rods 206, and then dock with the docking seat 202, which further facilitates the docking and disconnection of the lines and improves the power-off protection effect of the voltage measuring meter.

[0029] In this embodiment, Figure 2 As shown, the internal power supply 6, the electric telescopic component 203 and the sensor 3 are all electrically connected; the internal power supply 6 keeps the voltage measuring meter powered, and cooperates with the sensor 3 for control, thereby improving the timeliness of the power-off protection of the voltage measuring meter and improving the working stability of the internal components of the voltage measuring meter.

[0030] The use method and advantages of the utility model: When the voltage measuring meter with power-off protection is used, the working process is as follows:

[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, first, the operator wraps the two ends of the electrical component that needs to be measured for voltage around the measuring port 103 on the device housing 101; then the internal power supply 6 is started to power the internal component. When the voltage enters the protection component 2 through the measuring port 103, the current is connected to the sensor 3 and the electromagnetic induction component 4 through the connecting wire 208 connected to the docking head 207 plugged into the docking seat 202; then the connection of the internal current of the electromagnetic induction component 4 generates an electromagnetic reaction, driving the pointer 5 at one end to rotate on the dial 102, displaying the voltage data, and recording the data to complete the voltage measurement process of the electrical component; finally, when the current in the internal component is abnormal, after the inductor 3 senses, the electric telescopic component 203 is controlled to drive the squeezing plate 204 below to move up, driving the two rotating connecting rods 206 to move up, and cooperating with the connecting blocks 205 rotating at both ends to drive the docking head 207 to approach each other, so that the docking head 207 and the docking seat 202 are disconnected, and the voltage measuring meter can be powered off.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Technical staff in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A voltage measuring meter with power-off protection, comprising an external component (1), characterized in that: A protection component (2) is installed inside the external component (1), a sensor (3) is arranged on the top of the protection component (2), an electromagnetic induction component (4) is arranged on the top of the sensor (3), a pointer (5) is installed at one end of the electromagnetic induction component (4), and an internal power supply (6) is arranged on the top of the protection component (2); The external component (1) comprises a device housing (101), a dial (102) is installed outside the device housing (101), a measuring port (103) is arranged below the dial (102), heat dissipation ports (104) are passed through two sides of the device housing (101), a filter (105) is installed inside the heat dissipation port (104), and a heat dissipation fan (106) is installed on the top of the device housing (101); The protection component (2) comprises an insulating shell (201), docking seats (202) are installed on both sides of the insulating shell (201), an electric telescopic component (203) is installed on the top of the insulating shell (201), an extrusion plate (204) is installed on the bottom of the electric telescopic component (203), a connecting block (205) is installed on the bottom of the extrusion plate (204), one end of the connecting block (205) is rotatably connected to one end of a connecting rod (206), the bottom of the connecting rod (206) is rotatably connected to a docking head (207), and a connecting wire (208) is plugged into one side of the docking head (207).

2. The voltage measuring meter with power failure protection according to claim 1, characterized in that: The heat dissipation openings (104) are located at both sides of the bottom of the device housing (101), and a filter (105) is installed below the heat dissipation fan (106), and the heat dissipation fan (106) is electrically connected to the internal power supply (6).

3. The voltage measuring meter with power failure protection according to claim 1, characterized in that: The pointer (5) is installed on one end of the electromagnetic induction component (4) to form a rotation connection structure with one side of the device housing (101), and one side of the pointer (5) is attached to the outside of the dial (102).

4. The voltage measuring meter with power failure protection according to claim 1, characterized in that: There are two connecting rods (206), and the centers of the two connecting rods (206) form a rotating connection structure through a rotating shaft arranged on one side.

5. The voltage measuring meter with power-off protection according to claim 1, characterized in that: There are two docking joints (207), which form a sliding connection structure with the inner wall of the insulating shell (201) through a plug-in connection line (208), and the docking joint (207) and the docking seat (202) form a plug-in connection structure.

6. The voltage measuring meter with power failure protection according to claim 1, characterized in that: The internal power source (6), the electric telescopic assembly (203) and the sensor (3) are all electrically connected.

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