Omnidirectional magnetic needle demonstrator

Abstract

The utility model discloses an omni-directional magnetic needle demonstrator, which comprises a base support and an omni-directional rotating magnetic structural body arranged on the base support, the magnetic structural body comprises a rotating support and a magnetic needle arranged on the rotating support, the rotating support is provided with a horizontal rotating shaft and a vertical rotating shaft, and the horizontal rotating shaft and the vertical rotating shaft are arranged on the base support. Therefore, the magnetic needle can freely rotate in the horizontal direction and the vertical direction, the magnetic needle can flexibly point to any direction, and the magnetic field direction in any direction can be flexibly displayed.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic teaching aids, in particular to an omnidirectional magnetic needle demonstrator. Background Art

[0002] Oersted's experiment demonstrates the existence of a magnetic field around a current-carrying conductor. The steps are as follows: First, a small magnetic needle is left at rest. Because it is affected by the Earth's magnetic field, it points north and south. Second, an electric current is passed directly above and parallel to the needle. This causes the needle to rotate, proving the presence of a magnetic field around the current. Third, the direction of the current is changed, and the direction of the needle's rotation also changes, demonstrating that the direction of the current affects the direction of the magnetic field.

[0003] Traditional experiments use a small magnetic needle, which only works in the horizontal plane, making its display of magnetic fields very limited. In a real magnetic field environment, the direction of the magnetic field is three-dimensional, with multiple directional components. For example, around a current-carrying solenoid, the magnetic field has not only a horizontal component but also a vertical component. By relying solely on the horizontal direction of the small magnetic needle, students struggle to understand the true distribution of the magnetic field in space. For example, magnetic field lines can be spirals around a current-carrying conductor. This one-sided presentation hinders students from building a complete conceptual framework for magnetic fields. Utility Model Content

[0004] In view of the above-mentioned deficiencies, the main purpose of the present invention is to provide an omnidirectional magnetic needle demonstrator. When demonstrating the Oersted current magnetic effect experiment, changing the direction of the current conductor can achieve omnidirectional rotation of the magnetic needle in the vertical direction and the rotating bracket in the horizontal direction.

[0005] The above purpose of this utility model is achieved through the following technical solutions:

[0006] An omnidirectional magnetic needle demonstrator includes a base bracket and a rotatable magnetic structure arranged on the base bracket. The magnetic structure includes a rotating bracket and a magnetic needle arranged on the rotating bracket. The magnetic needle on the rotating bracket can rotate in the vertical direction. A rotating support body is provided at the bottom of the rotating bracket, and the rotating support body can rotate in the horizontal direction.

[0007] Furthermore, the rotating support body is a hollow tubular structure, the rotating support body is rotatably connected to the base bracket, and a supporting rod that cooperates with the base bracket is provided on the top of the base bracket.

[0008] As a further improvement, the rotating support body is rotationally connected to the base bracket, and the top of the base bracket is provided with a cylindrical blind hole or a similar hole structure capable of fixing the rotating support body.

[0009] Further improvement, the rotating support body is a hollow tubular structure, a non-magnetic metal needle is arranged in the hollow structure, a sleeve is provided on the base bracket, the inner aperture of the sleeve is matched with the non-magnetic metal needle, and the non-magnetic metal needle can rotate within the inner aperture of the sleeve.

[0010] Furthermore, a rotating rod is provided between the rotating brackets, the magnetic needle is fixed to the rotating rod, and the rotating rod is rotatably connected to the rotating bracket.

[0011] As a further improvement, a rotating rod is provided between the rotating brackets, and the magnetic needle is rotationally connected to the rotating rod.

[0012] Furthermore, the rotating bracket, rotating rod, rotating support body and base bracket are all made of non-magnetic materials.

[0013] The beneficial effects of the present invention will be further illustrated through specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a diagram of the overall state structure of the preferred structure of the utility model;

[0015] Figure 2 This is the overall state structure diagram of the preferred structure 2 of the utility model;

[0016] Figure 3 This is a structural diagram of a rotatable magnetic structure, which is the preferred structure of the utility model;

[0017] Figure 4 This is a structural diagram of the rotatable magnetic structure of the preferred structure 2 of the present utility model;

[0018] Figure 5 For Figure 4 Matching base bracket.

[0019] In the figure: 1. rotating support body, 1-1. non-magnetic metal needle, 2. rotating bracket, 3. rotating rod, 4. magnetic needle, 5. base bracket, 5-1. support rod, 5-2. sleeve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] The utility model discloses an omnidirectional magnetic needle demonstrator, which comprises a base bracket and a rotatable magnetic structure arranged on the base bracket. The magnetic structure comprises a rotating bracket and a magnetic needle arranged on the rotating bracket. The magnetic needle on the rotating bracket can rotate in a vertical direction. A rotating support body is provided at the bottom of the rotating bracket, and the rotating support body can rotate in a horizontal direction.

[0022] See also Figure 1 , which is a schematic structural diagram of a preferred embodiment of the present invention. A plastic disc-shaped base is provided at the bottom of the base bracket, and a support rod is provided at the top of the base bracket. A rotating support body is connected to the support rod. The rotating support body is a hollow aluminum tube structure, and the support rod is a needle-shaped structure made of aluminum or copper with a diameter of 1-5 mm, such as a non-magnetic steel, aluminum or copper nail or plastic nail. The top of the support rod is preferably a pointed, conical or semicircular structure with low rotational resistance, which facilitates the rotation of the rotating support body. The rotating support body is plugged into the support rod, and when the magnetic structure is subjected to a tangential force in the horizontal direction, the magnetic structure can rotate.

[0023] See also Figure 3 , a rotating bracket is fixedly connected to the top of the rotating support body, the rotating bracket is made of aluminum or plastic, and the rotating bracket is a U-shaped structure as shown in the figure or a similar structure. The rotating bracket is provided with a magnetic needle or a magnetic tube structure with conical ends, and the magnetic needle is connected to the rotating rod provided on the rotating bracket.

[0024] Furthermore, the magnetic needle is fixedly connected to the rotating rod, and the rotating rod is rotatably connected to the rotating bracket. Another structural solution is that the rotating rod is fixedly connected to the rotating bracket, and the magnetic needle is rotatably connected to the rotating rod.

[0025] See also Figure 2 The present invention also provides another rotating support structure, namely, a cylindrical structure with a diameter of 1-5 mm and a conical bottom made of non-magnetic steel, aluminum, copper, or plastic. The rotating support is directly inserted into a blind hole in the base bracket and can rotate vertically with the base bracket. Preferably, the blind hole can also be replaced with an external sleeve structure.

[0026] See also Figure 4 and Figure 5 The present invention also provides a third type of rotating support structure. The rotating support is a hollow tubular structure with a non-magnetic metal needle disposed within it. The base bracket is provided with a sleeve. The inner aperture of the sleeve rotates in conjunction with the non-magnetic metal needle. The non-magnetic metal needle is shorter than the rotating support. This structure has lower rotational resistance and is more secure, preventing students from being pricked by the needle during experiments.

[0027] In order to avoid affecting the sensitivity of the magnetic needle, the rotating bracket, the rotating rod, the rotating support body and the base bracket are all made of non-magnetic materials or plastic materials.

[0028] How to use: See Figure 1 or Figure 2 After the demonstration equipment is fixed, hold a straight wire with current (not shown in the figure), bring it close to the magnetic needle, and change the direction of the straight wire. According to Oersted's theorem, it can be found that the magnetic needle and the straight wire will always be perpendicular, and as the position of the straight wire changes, the magnetic needle and the magnetic structure will also rotate synchronously accordingly. The magnetic needle can flexibly point to any direction and can flexibly display the direction of the magnetic field in any direction, so as to better observe and understand the changes in the magnetic field in Oersted's experiment.

[0029] The one or more embodiments of this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this specification shall be included within the scope of protection of this disclosure.

Claims

1. An omnidirectional magnetic needle demonstrator, comprising a base support (5) and a rotatable magnetic structure arranged on the base support, the rotatable magnetic structure comprising a rotating support (2) and a magnetic needle (4) arranged on the rotating support, the magnetic needle on the rotating support being rotatable in a vertical direction, characterized in that: A rotating support body (1) is provided at the bottom of the rotating bracket, and the rotating support body can rotate in the horizontal direction. The rotating support body is a hollow tubular structure, and is rotatably connected to the base bracket. The top of the base bracket is provided with a supporting body (5-1) that matches the supporting body. The rotating support body is rotatably connected to the base bracket, and a cylindrical blind hole is provided on the top of the base bracket to match it. The rotating support body has a hollow structure, a non-magnetic metal needle (1-1) is arranged in the hollow structure, and a sleeve (5-2) is arranged on the base bracket, and the inner diameter of the sleeve matches the non-magnetic metal needle (1-1).

2. The omnidirectional magnetic needle demonstrator according to claim 1, characterized in that: A rotating rod (3) is provided between the rotating brackets, the magnetic needle is fixed to the rotating rod, and the rotating rod is rotatably connected to the rotating bracket.

3. The omnidirectional magnetic needle demonstrator according to claim 1, characterized in that: A rotating rod is provided between the rotating brackets, and the magnetic needle is rotatably connected to the rotating rod.

4. The omnidirectional magnetic needle demonstrator according to claim 2 or 3, characterized in that: The rotating bracket, rotating rod, rotating support body and base bracket are all made of non-magnetic materials.

Images