Television apparatus and electronic device

1. A television apparatus comprising:

a first component and a second component connected to be relatively rotatable;

a substantially cylindrical magnet provided to the first component, the magnet comprising a plurality of magnetic poles along an outer circumference;

a magnetic sensor provided to the second component, the magnetic sensor configured to detect magnetism of the magnetic poles; and

an engagement mechanism comprising at least one convex-concave engagement portion configured to mutually engage the magnet with the first component inside or along the outer circumference of the magnet, wherein the engagement mechanism is configured to be asymmetric with respect to a central axis of the magnet and asymmetric with respect to any virtual plane including the central axis, wherein:

the engagement mechanism comprises the convex-concave engagement portion along the outer circumference of the magnet, and

the convex-concave engagement portion is located opposite the magnetic sensor with respect to the central axis of the magnet.

2. A television apparatus comprising:

a first component and a second component connected to be relatively rotatable;

a substantially cylindrical magnet provided to the first component, the magnet comprising a plurality of magnetic poles along an outer circumference;

a magnetic sensor provided to the second component, the magnetic sensor configured to detect magnetism of the magnetic poles; and

an engagement mechanism comprising:

at least one convex-concave engagement portion configured to mutually engage the magnet with the first component inside or along the outer circumference of the magnet;

a first convex-concave engagement portion configured to mutually engage the magnet with the first component along the outer circumference of the magnet; and

a second convex-concave engagement portion configured to mutually fit-engage the magnet with the first component inside the magnet, and

wherein the engagement mechanism is configured to be asymmetric with respect to a central axis of the ma net and asymmetric with respect to an virtual plane including the central axis.

3. An electronic device comprising:

a first component and a second component connected to be relatively rotatable;

a substantially cylindrical magnet provided to the first component, the magnet comprising a plurality of magnetic poles along an outer circumference;

an engagement mechanism comprising a convex-concave engagement portion configured to mutually engage the magnet with the first component along the outer circumference of the magnet, wherein the engagement mechanism is configured to be asymmetric with respect to a central axis of the magnet and asymmetric with respect to any virtual plane including the central axis; and

a magnetic sensor provided to the second component so as to face a cylindrical outer circumferential surface of the magnet located separate from the convex-concave engagement portion in a relative rotation range of the first component and the second component, the magnetic sensor configured to detect magnetism of the magnetic poles.

4. The electronic device of claim 3 , further comprising:

a first body comprising at least one of an input, an output, and a control circuit board;

a second body comprising at least one of an input, an output, and a control circuit board; and

a joint connected to both the first body and the second body to be relatively rotatable, wherein

the magnet is provided to the joint as the first component, and

the magnetic sensor is provided to at least one of the first body and the second body as the second component.

5. The electronic device of claim 3 , wherein

the second component comprises a display panel, which is arranged on one side in a thickness direction of a housing of the second component, and

the magnetic sensor is located on another side in the thickness direction of the housing.

6. The electronic device of claim 3 , wherein

the first component comprises an outer wall that bends about a rotation axis as a central axis of relative rotation of the first component and the second component, and

the magnet is arranged such that the outer circumference of the magnet is located near an inner circumferential surface of the outer wall.

7. The electronic device of claim 3 , further comprising a shaft to attach the magnet, the shaft comprising a protrusion.

8. The electronic device of claim 7 , wherein the protrusion is plastically deformed with attachment of the magnet.

9. The electronic device of claim 7 , wherein the protrusion includes a plurality of protrusions that are aligned in order of height.

10. An electronic device comprising:

a first component provided with a magnetic sensor;

a substantially cylindrical magnetic element comprising a plurality of magnetic poles, the magnetic element further comprising a positioning mechanism comprising a positioning portion located on an outer circumference and configured to be asymmetric with respect to any virtual plane including a central axis;

a second component provided with the magnetic element and rotatably connected to the first component, wherein

the magnetic sensor is provided to face a cylindrical outer circumferential surface of the magnetic element located separate from the positioning portion located on the outer circumference in a rotation range of the first component and the second component.

11. The electronic device of claim 10 , further comprising a shaft to attach the magnetic element, the shaft comprising a protrusion.

12. The electronic device of claim 11 , wherein the protrusion is plastically deformed with attachment of the magnetic element.

13. The electronic device of claim 11 , wherein the protrusion includes a plurality of protrusions that are aligned in order of height.