CN110728889A

CN110728889A - Novel solenoid

Info

Publication number: CN110728889A
Application number: CN201910946138.3A
Authority: CN
Inventors: 沈向安
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-12-02
Filing date: 2019-10-02
Publication date: 2020-01-24
Also published as: CN210925144U

Abstract

The novel solenoid comprises a spiral coil, a transparent bracket, a binding post, a track, a plurality of magnetic field direction indicating devices, a battery box, a power switch and an indicator light; the method is characterized in that: a small hole is arranged on the transparent bracket (8), and a lead of the spiral coil 1 passes through the small hole and is fixed on the transparent bracket (8); a transparent bracket (8) in the spiral coil (1) is provided with a track; the track is composed of a guide rail (2) and a track sliding plate (5), and the track sliding plate (5) is connected with the guide rail (2) in a sliding manner; the lead of the spiral coil is electrically connected with the binding post (3), the battery box (4), the switch (6) and the indicator light (7) through the lead.

Description

Novel solenoid

Technical Field

Belongs to the field of physical teaching aids.

Background

The solenoids used today have the following problems: 1. cannot be used alone and needs to be matched with other elements. If special connecting circuits are needed, or special student power sources are needed; 2. the judgment of the direction of the magnetic field inside the electrified solenoid is often difficult to learn because the magnetic field is contradictory to like magnetic poles and unlike magnetic poles memorized by students, and the best method for teachers to break through the difficulty is to use the electrified solenoid and place a small magnetic needle inside the solenoid to judge the direction of the magnetic field inside the electrified solenoid; to overcome the difficulties, teachers can only place a small magnetic needle inside the solenoid and then energize it. There are the following problems: (1) the small magnetic needle needs to be placed in a fine operation, and can fall off from the base by a little carelessness; the inside of the solenoid is a uniform magnetic field, if a small magnet is placed, the direction of the magnetic field at other positions cannot be seen, and if a plurality of small magnetic needles are placed at the same time, the small magnetic needles can be attracted together in the operation process. Multiple operations within a limited classroom time can result in a wasteful use of time. (2) The small needle will deflect at the instant of energization and the N pole will point in the direction of the magnetic field inside the solenoid but will not be able to indicate the change in direction of the magnetic field from inside to outside the solenoid. (3) The current solenoid needs to be matched with other elements for use, namely when a teacher needs to break through the teaching difficulty, the circuit and other elements need to be prepared firstly, integration is not embodied, and therefore the teacher takes time to prepare experimental equipment.

In order to overcome the problems, a sliding track is added into the solenoid, so that the small magnetic needle can be placed quickly through the sliding track, the pointing directions of the same small magnetic needle at different positions inside and outside the solenoid can be seen when the track slides from inside to outside or from outside to inside, and when the track slides in, different small magnetic needles can indicate the magnetic field directions of different positions in the solenoid and can display that a uniform magnetic field exists inside the solenoid.

The solenoid is provided with circuits such as a battery box, a switch, an indicator light and the like, so that teachers and students do not need to be provided with a plurality of instrument elements to connect the circuits when using the solenoid, and time is saved.

The design of the terminal post enables the connection to be used with a student's power supply when the battery is not available.

Disclosure of Invention

The novel solenoid comprises a spiral coil, a transparent bracket, a binding post, a track, a plurality of magnetic field direction indicating devices, a battery box, a power switch and an indicator light; the method is characterized in that: a small hole is arranged on the transparent bracket 8, and a lead of the spiral coil 1 passes through the small hole and is fixed on the transparent bracket 8; a transparent bracket 8 in the spiral coil 1 is provided with a track; the track is composed of a guide rail 2 and a track sliding plate 5, and the track sliding plate 5 is connected with the guide rail 2 in a sliding manner; the lead of the spiral coil is electrically connected with the terminal 3, the battery box 4, the switch 6 and the indicator light 7 through the lead.

The magnetic field direction indicating device is a small magnetic needle, and the small magnetic needle comprises a base and a small magnetic needle; the small magnetic needle is placed on the base.

The magnetic field direction indicating device comprises a closed transparent spherical shell, liquid, a small magnetic needle, a buoyancy block and a balance rod; the transparent spherical shell is filled with liquid, the small magnetic needle and the balance rod form a T shape, and the balance rod is positioned in the center of the small magnetic needle; the buoyancy block is arranged at the joint of the T shape; the length of the balancing rod is greater than that of the small magnetic needle. The closed transparent spherical shell is fixed on the track sliding plate 5.

The switch 6 is only used for controlling the on-off of the battery box and the solenoid. The battery box, the switch 6, the binding post, the indicator light and the spiral coil are sequentially connected in series, and the switch 6 is arranged between the battery box and the binding post.

Drawings

Fig. 1 shows a structure of a novel solenoid.

Fig. 2. a transparent spherical shell-shaped magnetic field indicating device is fixed on the track sliding plate 5.

Fig. 3. small magnetic needle.

Detailed Description

The novel solenoid comprises a spiral coil 1, a transparent bracket 8, a binding post 3, a track, a plurality of magnetic field direction indicating devices, a battery box, a power switch and an indicator light; the method is characterized in that: a small hole is arranged on the transparent bracket 8, and a lead of the spiral coil 1 passes through the small hole and is fixed on the transparent bracket 8; a transparent bracket 8 in the spiral coil 1 is provided with a track; the track is composed of a guide rail 2 and a track sliding plate 5, and the track sliding plate 5 is connected with the guide rail 2 in a sliding manner; the lead of the spiral coil is electrically connected with the terminal 3, the battery box 4, the switch 6 and the indicator light 7 through the lead.

The magnetic field direction indicating device is a small magnetic needle, and the small magnetic needle comprises a base and a small magnetic needle; the small magnetic needle is placed on the base. The small magnetic needle can freely rotate on the base.

The magnetic field direction indicating device comprises a closed transparent spherical shell 51, liquid 53, a small magnetic needle, a buoyancy block and a balance rod; the transparent spherical shell is filled with liquid, the small magnetic needle and the balance rod form a T-shaped structure 52, and the balance rod is positioned in the center of the small magnetic needle; the buoyancy block is arranged at the joint of the T shape; the length of the balancing rod is greater than that of the small magnetic needle. The volume of the liquid is about half of the volume of the spherical shell.

The switch 6 is only used for controlling the on-off of the battery box and the solenoid. The battery box 4, the switch 6, the wiring terminal 3, the indicator light 7 and the spiral coil 1 are sequentially connected in series, the switch 6 is arranged between the battery box and the wiring terminal 3, and only the on-off of the battery box 4 and the spiral coil 1 is controlled.

Claims

1. The novel solenoid comprises a spiral coil, a transparent bracket, a binding post, a track, a plurality of magnetic field direction indicating devices, a battery box, a power switch and an indicator light; the method is characterized in that: a small hole is arranged on the transparent bracket (8), and a lead of the spiral coil 1 passes through the small hole and is fixed on the transparent bracket (8); a transparent bracket (8) in the spiral coil (1) is provided with a track; the track is composed of a guide rail (2) and a track sliding plate (5), and the track sliding plate (5) is connected with the guide rail (2) in a sliding manner; the lead of the spiral coil is electrically connected with the binding post (3), the battery box (4), the switch (6) and the indicator light (7) through the lead.

2. The new solenoid according to claim 1, wherein: the magnetic field direction indicating device is a small magnetic needle, and the small magnetic needle comprises a base and a small magnetic needle; the small magnetic needle is placed on the base.

3. The new solenoid according to claim 1, wherein: the magnetic field direction indicating device comprises a closed transparent spherical shell, liquid, a small magnetic needle, a buoyancy block and a balance rod; the transparent spherical shell is filled with liquid, the small magnetic needle and the balance rod form a T shape, and the balance rod is positioned in the center of the small magnetic needle; the buoyancy block is arranged at the joint of the T shape; the length of the balance rod is greater than that of the small magnetic needle; the closed transparent spherical shell is fixed on the track sliding plate (5).

4. The new solenoid according to claim 1, wherein: the switch (6) is only used for controlling the on-off of the battery box and the solenoid.