Voltmeter for physical experiment

Abstract

The utility model discloses a voltmeter for a physical experiment, which comprises a voltmeter body, a dial plate is arranged on one side of the voltmeter body, a knob is rotatably mounted on the surface of one side of the voltmeter body, a binding post is fixedly connected to the upper surface of the voltmeter body, a pressing cylinder is in threaded connection with the outer surface of the binding post, and the pressing cylinder is in threaded connection with the upper surface of the voltmeter body. The bottom of the pressing cylinder is provided with a pressing ring, the outer surface of the pressing cylinder is provided with an anti-slip strip, the trademark name of the binding post is fixedly connected with a connector, the upper end of the connector is provided with a wire clamping groove, the surfaces of the two sides of the connector are provided with elastic notches, the surfaces of the two sides of the wire clamping groove are both provided with annular grooves, and the annular grooves are fixedly connected with the binding post. A positioning sleeve is fixedly sleeved with the annular groove, and a limiting rubber head is fixedly connected to one side of the positioning sleeve, so that a wire can be directly clamped to carry out a power connection experiment, convenience and high efficiency are achieved, negative pressure adsorption can be achieved to assist positioning, convenience and stability are achieved, and adaptability is high.

Description

Technical Field

[0001] This utility model relates to the field of voltmeters, and more specifically, to a voltmeter used in physical experiments. Background Technology

[0002] Physics experiments are a crucial foundation of physics teaching, used to verify theorems and laws in the field. On one hand, physics experiments can lead to the conclusion of problems; on the other hand, students can master basic experimental knowledge and methods, cultivate experimental skills and abilities, and ultimately achieve the ideal curriculum goals of physics. Voltmeters will be used in students' learning and practice.

[0003] The utility model patent with authorization announcement number CN 214098869 U discloses a voltmeter for physical experiments. It relates to the field of physics experiments and features three protrusions that are snapped onto the front end of a base using elastic clips. A conductive sleeve is fitted inside the protrusions and fixed to the circuit board with bolts. A sleeve is fitted into a groove in the middle of the base, and the meter head is embedded in the sleeve. The meter needle is assembled with the meter head. The dial has a series of graduations. A base plate is fixed to the bottom of the base with bolts, and the circuit board is fixed to the lower end of the base with bolts. A conductive magnet is embedded in the base plate using an interference fit. A battery is located at the lower end of the circuit board, and a wireless charging module is located above the base plate. This voltmeter upgrades the traditional physics experiment voltmeter's shape and structure with intelligent features, achieving intelligent monitoring. The optimization does not affect students' operating procedures and habits.

[0004] In the aforementioned disclosed structure, the terminal block lacks an integrated connector to provide a wire clamping groove, allowing only for spiral compression of the wire. It cannot directly clamp the wire for quick assembly and disassembly, resulting in poor adaptability. Furthermore, the lack of an adsorption cover at the bottom hinders negative pressure adsorption for positioning, leading to insufficient stability, which requires improvement. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a voltmeter for physical experiments. The clamping cylinder is connected to the terminals on the voltmeter body, and the wires can be clamped by a threaded connection, which is relatively stable. Furthermore, the connector at the top is equipped with a wire clamping groove and an elastic notch, which, together with the positioning sleeve and the limiting rubber head, allows for direct clamping of wires for electrical connection experiments, which is convenient and efficient. At the same time, the rubber adsorption cover arranged in the mounting groove at the bottom can be used for negative pressure adsorption to assist in positioning, which is convenient, stable, and highly adaptable.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A voltmeter for physical experiments includes a voltmeter body, a dial on one side of the voltmeter body, a knob rotatably mounted on one side surface of the voltmeter body, a terminal block fixedly connected to the upper surface of the voltmeter body, a clamping cylinder threadedly connected to the outer surface of the terminal block, a clamping ring at the bottom of the clamping cylinder, an anti-slip strip on the outer surface of the clamping cylinder, a connector fixedly connected to the terminal block, a wire-locking groove at the upper end of the connector, elastic notches on both sides of the connector, an annular groove on both sides of the wire-locking groove, a positioning sleeve fixedly fitted inside the annular groove, a limiting rubber head fixedly connected to one side of the positioning sleeve, and the limiting rubber head symmetrically connected to both sides inside the wire-locking groove.

[0008] Furthermore, a mounting groove is provided on one side of the lower surface of the voltmeter body, and a rubber suction cover is fixedly connected inside the mounting groove.

[0009] Furthermore, the rubber adsorption covers are arranged at equal intervals inside the mounting groove and aligned with the lower surface of the voltmeter body. The rubber adsorption covers are connected through the mounting groove, and can elastically deform to form a negative pressure cavity, which is conducive to adsorption and positioning on the experimental platform, making it convenient and stable.

[0010] Furthermore, an adjusting rod is rotatably mounted inside the mounting groove, and the adjusting rod is located at the upper end of the rubber adsorption cover.

[0011] Furthermore, both ends of the adjusting rod are fixedly connected to adjusting blocks, and the top of the adjusting blocks are connected to the two side surfaces of the voltmeter body. By installing adjusting blocks at both ends of the adjusting rod, it can be positioned by pressing against the side to prevent loosening. At the same time, it can be manually rotated for adjustment, which is convenient and efficient.

[0012] Furthermore, a positioning head is fixedly connected to the middle position inside the rubber adsorption cover, and a pull rope is fixedly connected to one end of the positioning head.

[0013] Furthermore, one end of the pull rope is fixedly connected to the upper surface of the rubber adsorption cover, and the other end of the pull rope is wound and connected to the outer surface of the adjusting rod. The positioning head and the pull rope are connected through the rubber adsorption cover. The rope can be wound and pulled to deform, increasing the size of the internal cavity to form negative pressure, which is beneficial for operation and use, and is convenient and stable.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) This solution connects the clamping cylinder to the terminals on the voltmeter body, and the wires can be clamped by threaded connection, which is relatively stable. Furthermore, the top connector is equipped with a wire clamping groove and an elastic notch, which, combined with the positioning sleeve and the limiting rubber head, allows the wires to be directly clamped for electrical connection experiments, which is convenient and efficient. At the same time, the rubber adsorption cover is arranged in the mounting groove at the bottom, which can be negatively adsorbed to assist in positioning, which is convenient, stable, and highly adaptable.

[0016] (2) The rubber adsorption cover is connected by the mounting groove, which can elastically deform to form a negative pressure cavity, which is conducive to adsorption and positioning on the experimental platform, making it convenient and stable.

[0017] (3) By installing adjustment blocks at both ends of the adjustment rod, it can be positioned by pressing against the side to prevent loosening. At the same time, it can be manually rotated for adjustment, which is convenient and efficient.

[0018] (4) The positioning head and the pull rope are connected by a rubber suction cover. They can be wound and pulled to deform, increase the size of the internal cavity to form negative pressure, which is conducive to operation and use, and is convenient and stable. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the planar structure of this utility model;

[0021] Figure 3 This is a structural diagram of the terminal block and connector of this utility model;

[0022] Figure 4 This is a bottom structural diagram of the rubber adsorption cover connection of this utility model;

[0023] Figure 5 This is a schematic diagram of the connection between the terminal block and the clamping cylinder of this utility model.

[0024] Explanation of the labels in the diagram:

[0025] 1. Voltmeter body, 11. Dial, 12. Knob, 13. Terminal, 14. Clamping cylinder, 15. Clamping ring, 16. Anti-slip strip, 2. Connector, 21. Wire clamping groove, 22. Elastic notch, 23. Annular groove, 24. Positioning sleeve, 25. Limiting rubber head, 3. Mounting groove, 31. Rubber suction cover, 32. Adjusting rod, 33. Adjusting head, 34. Positioning head, 35. Pull rope. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1 , Figure 3 and Figure 5 A voltmeter for physical experiments includes a voltmeter body 1, a dial 11 on one side of the voltmeter body 1, a knob 12 rotatably mounted on one side surface of the voltmeter body 1, and a terminal block 13 fixedly connected to the upper surface of the voltmeter body 1. A wire can be wound around the terminal block 13 for easy connection, facilitating experimental operation. A clamping cylinder 14 is threaded onto the outer surface of the terminal block 13. A clamping ring 15 is located at the bottom of the clamping cylinder 14, and anti-slip strips 16 are provided on the outer surface of the clamping cylinder 14, allowing for manual rotation of the clamping cylinder 14 to adjust its height. Combined with the clamping ring 15 at the bottom, the clamping cylinder 14 securely holds the connected wire, ensuring stable circuit connection and facilitating testing of the physical circuit through the voltmeter body 1. A connector 2 is fixedly connected to the terminal block 13. The connector 2 has a wire-clamping groove 21 at one end and elastic notches 22 on both sides of the connector 2. Both sides of the wire-clamping groove 21 have annular grooves 23. A positioning sleeve 24 is fixedly fitted inside the annular groove 23. A limiting rubber head 25 is fixedly connected to one side of the positioning sleeve 24. The limiting rubber heads 25 are symmetrically connected to both sides of the inside of the wire-clamping groove 21. When frequent wiring is required, the guide end can be directly clamped into the wire-clamping groove 21 and positioned by the limiting rubber head 25 at the end to prevent loosening. This facilitates clamping and positioning for connection and positioning. It can be connected to the terminal 13 to access the circuit for testing. The two sides of the wire-clamping groove 21 can be elastically deformed and avoid the elastic notches 22 on both sides, which helps to open up to a certain angle. Multiple wires can be connected, which is convenient for adjustment and use.

[0028] Please see Figure 1 , Figure 2 and Figure 4 A mounting groove 3 is provided on one side of the lower surface of the voltmeter body 1. A rubber adsorption cover 31 is fixedly connected inside the mounting groove 3. The rubber adsorption covers 31 are evenly spaced inside the mounting groove 3 and aligned with the lower surface of the voltmeter body 1. The rubber adsorption covers can be elastically deformed to form a negative pressure cavity through the mounting groove, which is conducive to adsorption and positioning on the experimental platform and is convenient and stable.

[0029] An adjusting rod 32 is rotatably mounted inside the mounting slot 3. The adjusting rod 32 is located at the upper end of the rubber adsorption cover 31. Adjusting blocks 33 are fixedly connected to both ends of the adjusting rod 32. The top of the adjusting blocks 33 is connected to the two side surfaces of the voltmeter body 1. By installing the adjusting blocks at both ends of the adjusting rod, it can be positioned by pressing against the side to prevent loosening. At the same time, it can be manually rotated for adjustment, which is convenient and efficient.

[0030] A positioning head 34 is fixedly connected to the middle position inside the rubber adsorption cover 31. A pull rope 35 is fixedly connected to one end of the positioning head 34. One end of the pull rope 35 is fixedly connected to the upper surface of the rubber adsorption cover 31, and the other end of the pull rope 35 is wound around and connected to the outer surface of the adjusting rod 32. The positioning head and the pull rope are connected through the rubber adsorption cover, which can be wound and pulled to deform, increase the size of the internal cavity to form a negative pressure, which is convenient for operation and use, and is stable. When in use, the voltmeter body 1 can be placed on the physical experiment table, and the bottom opening of the rubber adsorption cover 31 can be attached to the surface of the experiment table. Then, the adjusting heads 33 on both sides can be manually rotated, and the adjusting rod 32 can be rotated to wind the pull rope 35. Combined with the positioning head 34 pulling the middle position of the rubber adsorption cover 31, it can be pulled upward to increase the internal space, thereby forming a negative pressure structure. It can also be combined with air pressure for auxiliary positioning, which is stable and efficient. Reverse rotation of the adjusting head 33 can release the pull rope 35, thereby resetting the rubber adsorption cover 31 and reducing the pressure. It can be loosened, which is convenient for adjustment and use, and has high adaptability.

[0031] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A voltmeter for physical experiments, comprising a voltmeter body (1), a dial (11) provided on one side of the voltmeter body (1), and a knob (12) rotatably mounted on one side surface of the voltmeter body (1), characterized in that: A terminal block (13) is fixedly connected to the upper surface of the voltmeter body (1). A clamping cylinder (14) is threadedly connected to the outer surface of the terminal block (13). A clamping ring (15) is provided at the bottom of the clamping cylinder (14). An anti-slip strip (16) is provided on the outer surface of the clamping cylinder (14). A connector (2) is fixedly connected to the terminal block (13). A wire-locking groove (21) is provided at the upper end of the connector (2). An elastic notch (22) is provided on both sides of the connector (2). An annular groove (23) is provided on both sides of the wire-locking groove (21). A positioning sleeve (24) is fixedly sleeved inside the annular groove (23). A limiting rubber head (25) is fixedly connected to one side of the positioning sleeve (24). The limiting rubber head (25) is symmetrically connected to both sides inside the wire-locking groove (21).

2. The voltmeter for physical experiments according to claim 1, characterized in that: The lower surface of the voltmeter body (1) is provided with a mounting groove (3), and a rubber adsorption cover (31) is fixedly connected inside the mounting groove (3).

3. The voltmeter for physical experiments according to claim 2, characterized in that: The rubber adsorption covers (31) are arranged at equal intervals inside the mounting groove (3) and aligned with the lower surface of the voltmeter body (1).

4. The voltmeter for physical experiments according to claim 2, characterized in that: An adjusting rod (32) is rotatably mounted inside the mounting groove (3), and the adjusting rod (32) is located at the upper end of the rubber adsorption cover (31).

5. The voltmeter for physical experiments according to claim 4, characterized in that: Both ends of the adjusting rod (32) are fixedly connected to adjusting blocks (33), and the top of the adjusting blocks (33) are connected to the two side surfaces of the voltmeter body (1).

6. The voltmeter for physical experiments according to claim 2, characterized in that: A positioning head (34) is fixedly connected to the middle position inside the rubber adsorption cover (31), and a pull rope (35) is fixedly connected to one end of the positioning head (34).

7. The voltmeter for physical experiments according to claim 6, characterized in that: One end of the pull rope (35) is fixedly connected to the upper surface of the rubber adsorption cover (31), and the other end of the pull rope (35) is wrapped around the outer surface of the adjusting rod (32).

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