Hand-held DC resistance tester

Abstract

The utility model discloses a handheld DC resistance tester, which relates to the technical field of test equipment, and comprises a tester main body, a handle, a movable plate box and a display screen, the rear end of the tester main body is rotatably connected with a movable plate, the rear end of the movable plate is fixedly connected with a left sliding rod and a right sliding rod, and the sliding rods are slidably connected with the handle. The left side and the right side of the handle are in threaded connection with first fixing screws, the handle can be fixed to the sliding rod through the fixing screws, the rear side of the tester body is provided with an upper internal thread groove, a lower internal thread groove, a left internal thread groove and a right internal thread groove, the movable plate is in threaded connection with second fixing screws, and a user can adjust the length and the angle of the handle according to needs through the adjustable handle. Therefore, the tester is not only suitable for handheld use, but also can be used as a support to adjust the inclination angle of the tester, a user can conveniently adjust the tester according to the working environment, and compared with a traditional box-type direct-current resistance tester, the tester is smaller in size, lighter in weight and convenient to carry and operate.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically a handheld DC resistance tester. Background Technology

[0002] A resistor is a current-limiting element. When connected in a circuit, its resistance is fixed, typically with two leads, limiting the current flowing through the branch it's connected to. Resistors with unchangeable resistance are called fixed resistors, while those with variable resistance are called potentiometers or variable resistors. An ideal resistor is linear, meaning the instantaneous current through it is directly proportional to the applied instantaneous voltage. One or two movable metal contacts are pressed tightly against the exposed resistive element; the position of these contacts determines the resistance between either end of the resistive element and the contacts. The resistance value of a resistor is generally related to temperature, material, length, and cross-sectional area. The physical quantity that measures the effect of temperature on resistance is the temperature coefficient, defined as the percentage change in resistance for every 1°C increase in temperature. The main physical characteristic of a resistor is its conversion of electrical energy into heat energy; it can also be considered an energy-consuming element, generating internal energy as current flows through it. Resistors typically function as voltage dividers and current dividers in circuits. For signals, both AC and DC signals can pass through resistors. In general, DC resistance testing is a mandatory test item in the manufacturing of transformers, including semi-finished products, finished products, factory tests, installation, commissioning tests, and preventive tests by the power sector. Through testing, manufacturing defects such as material selection, welding, loose connections, missing strands, and broken wires in transformer coils can be effectively detected, as well as potential hidden dangers after operation.

[0003] Existing DC resistance testers are mostly box-type DC resistance testers, which are large, heavy, inconvenient to carry, and cannot be used handheld. Therefore, those skilled in the art have provided a handheld DC resistance tester to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to provide a handheld DC resistance tester to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A handheld DC resistance tester includes a tester body, a handle, a movable plate, and a display screen. The rear end of the tester body is rotatably connected to a movable plate, and the rear end of the movable plate is fixedly connected to two sliding rods. The handle is slidably connected to the sliding rods, and the left and right sides of the handle are threaded with first fixing screws. The fixing screws can fix the handle to the sliding rods. The rear side of the tester body has four internal threaded grooves (up, down, left, and right).

[0007] As a further embodiment of this utility model: a second fixing screw is threadedly connected to the movable plate, wherein the second fixing screw can be threadedly connected to the internal thread groove, thereby fixing the movable plate to the main body of the testing instrument.

[0008] As a further improvement of this utility model: a rotating ring is fixedly connected to the front end of the movable plate, wherein the rotating ring is movably connected inside the main body of the testing instrument.

[0009] As a further improvement of this utility model: a display screen is fixedly installed on the front of the main body of the tester, and several sets of buttons are provided below the display screen.

[0010] As a further improvement of this utility model: a power interface is provided on one side of the main body of the tester, and a USB interface is provided below the power interface.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. The adjustable handle allows users to adjust its length and angle as needed. This makes the tester suitable not only for handheld use but also as a stand, allowing users to adjust its tilt angle for convenient adaptation to their work environment.

[0013] 2. Compared with traditional box-type DC resistance testers, the tester designed in this way is smaller and lighter, making it easier to carry and operate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a handheld DC resistance tester.

[0015] Figure 2 This is a schematic diagram of the movable plate and handle in a handheld DC resistance tester.

[0016] Figure 3 This is a schematic diagram of the structure of the first fixing screw and the internal thread groove in a handheld DC resistance tester.

[0017] Figure 4 This is a schematic diagram of the structure of the second fixing screw and sliding rod in a handheld DC resistance tester.

[0018] In the diagram: 1. Tester body; 2. Handle; 3. Movable plate; 4. First fixing screw; 5. Second fixing screw; 6. Rotating ring; 7. Internal thread groove; 8. USB interface; 9. Power interface; 10. Display screen; 11. Button; 12. Sliding rod. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] Please see Figures 1-4 In this embodiment of the utility model, a handheld DC resistance tester includes a tester body 1, a handle 2, a movable plate 3, and a display screen 10. The movable plate 3 is rotatably connected to the rear end of the tester body 1. Two sliding rods 12 are fixedly connected to the rear end of the movable plate 3. The handle 2 is slidably connected to the sliding rods 12. First fixing screws 4 are threaded to both sides of the handle 2, which can fix the handle 2 to the sliding rods 12. Four internal threaded grooves 7 are opened on the rear side of the tester body 1. Second fixing screws 5 are threaded to the movable plate 3, which can be threaded to the internal threaded grooves 7, thereby fixing the movable plate 3 to the tester body 1. A rotating ring 6 is fixedly connected to the front end of the movable plate 3, which is movably connected inside the tester body 1. The display screen 10 is fixedly installed on the front of the tester body 1. Several sets of buttons 11 are arranged below the display screen 10. A power interface 9 is arranged on one side of the tester body 1, and a USB interface 8 is arranged below the power interface 9.

[0021] The working principle of this utility model is as follows: When the user needs to conduct a test, the handle 2 can be rotated to be parallel to the left and right sides of the tester body 1. Then, the movable plate 3 is fixed to the tester body 1 using the second fixing screw 5 to ensure that the movable plate 3 is stable and immovable. In this way, it can be operated by hand during the test. At the same time, the tester is also equipped with a power interface 9 and a USB interface 8, which enables the device to be connected to other external devices or charged, increasing the applicability of the instrument. In addition, the handle 2 can not only be adjusted in length, but can also be rotated to be parallel to the top and bottom sides of the tester body 1. Then, the movable plate 3 is fixed to the tester body 1 using the second fixing screw 5 to ensure that the movable plate 3 is stable and immovable. In this way, the handle 2 can be used as a support to support the tester. When the handle 2 is extended, the handle 2 can be fixed to the sliding rod 12 using the first fixing screw 4. In this way, the tilt angle of the tester can be adjusted, which is convenient for users to operate according to different usage scenarios.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A handheld DC resistance tester, comprising a tester body (1), a handle (2), a movable plate (3), and a display screen (10), characterized in that, The tester body (1) has a movable plate (3) rotatably connected to its rear end. The movable plate (3) has two sliding rods (12) fixedly connected to its rear end. A handle (2) is slidably connected to the sliding rod (12). The handle (2) has a first fixing screw (4) threadedly connected to both the left and right sides. The tester body (1) has four internal thread grooves (7) on its rear side, and a second fixing screw (5) is threadedly connected to the movable plate (3).

2. The handheld DC resistance tester according to claim 1, characterized in that, The front end of the movable plate (3) is fixedly connected to a rotating ring (6), which is movably connected inside the main body (1) of the tester.

3. A handheld DC resistance tester according to claim 1, characterized in that, The main body (1) of the tester is fixedly equipped with a display screen (10) on the front, and several sets of buttons (11) are provided below the display screen (10).

4. A handheld DC resistance tester according to claim 1, characterized in that, The main body (1) of the tester is provided with a power interface (9) on one side, and a USB interface (8) is provided below the power interface (9).

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