JP2014229468A5 - - Google Patents

Description

The information input apparatus according to the present invention includes an operation member which is operated to rotate, has a ring shape, a different magnetic poles formed in the radial direction, a first magnet that is fixed to the operating member, the ring-shaped has a shape, magnetic poles different in the axial direction perpendicular to the radial direction is formed, and a second magnet fixed to the operating member such that the first magnet and concentric, the first a stator having opposite magnetic pole teeth in the pole and said radial magnet in, characterized in that it comprises a rotation detecting element which faces the second magnet in the axial direction.

<First Embodiment>
FIG. 1 is an exploded perspective view of an information input device 10 according to the first embodiment of the present invention. The information input device 10 is generally configured by an operation member 1, a magnet unit 2, a stator 3, a support body 4, a cover plate 5, a central button 6, a nonconductive sheet 7 and a substrate 8. 2 is a cross-sectional view of the information input device 10, FIG. 2 (a) is a cross-sectional view through the dome switches 8b and 8c mounted on the substrate 8, and FIG. 2 (b) is mounted on the substrate 8. 3 is a cross-sectional view passing through a rotation detection element 9. FIG.

The central button 6 is disposed in the central opening of the cover plate 5 and is supported so as to be movable (pressed) in the axial direction. The cover plate 5 prevents the central button 6 from coming off in the axial direction. A cylindrical portion 6a is provided at the center of the back surface of the central button 6, and a projection 7a of the non-conductive sheet 7 and a dome switch 8a of the substrate 8 are disposed below the cylindrical portion 6a.

The non-conductive sheet 7 has a circular shape covering the entire five dome switches 8a, 8b, 8c, 8d, and 8e mounted on the substrate 8. As shown in FIG. 2A, on the back surface of the non-conductive sheet 7, projections 7a, 7b, 7c, 7d, and 7e (however, at positions corresponding to the dome switches 8a to 8e of the substrate 8) 7d and 7e are not shown). Further, the non-conductive sheet 7 is provided with a hole portion 7f for allowing the rotation detecting element 9 mounted on the substrate 8 to face the second ring-shaped magnet 2b.

Five dome switches 8a to 8e are mounted on the substrate 8, and these dome switches 8a to 8e are hemispherically raised from the surface of the substrate 8, and the switches are turned on when the surface is pushed down. It has a structure that generates an elastic click feeling. In this embodiment, the dome switches 8a to 8e are arranged in a cross shape so that the dome switches 8b to 8e are 90 degrees out of phase with the dome switch 8a as the center. The dome switch 8a is below the projection 7a of the non-conductive sheet 7, the dome switch 8b is below the projection 7b, the dome switch 8c is below the projection 7c, and the dome switch 8d is the projection 7d (not shown). The dome switches 8e are respectively disposed below the protrusions 7e (not shown).

When the circumferential end of the operating member 1 and the vicinity of the upper portion of the dome switch 8b in the axial direction are pressed down in the axial direction, the operating member 1 tilts together with the support body 4, and at that time, the magnet fixed to the operating member 1 The unit 3 and the stator 3 fixed to the support 4 are also tilted together. Then, the support 4 and the stator 3 push down the projection 7b of the non-conductive sheet 7, and the projection 7b pushes down the dome switch 8b provided on the substrate 8, whereby the dome switch 8b is elastically deformed. The switch is turned on at the same time as the click feeling occurs. When the pressing of the operation member 1 is stopped, the shape of the dome switch 8b is restored to the initial state by the click force of the dome switch 8b, and thereby the protrusion 7b, the support 4 and the stator 3 are also pushed up, and the operation member 1 is Return to the position (no tilt). Since the dome switches 8c to 8e have the same structure as the dome switch 8b and operate in the same manner, the description thereof is omitted.

FIG. 3 is a perspective view schematically showing the state of magnetization (magnetic pole formation) of the first ring-shaped magnet 2a and the second ring-shaped magnet 2b constituting the information input device 10. As shown in FIG. FIG. 3 shows a state in which the first ring-shaped magnet 2a and the second ring-shaped magnet 2b shown in FIG. 1 are viewed from the lower side (back side). The first ring-shaped magnet 2a is equally divided into 12 parts in the circumferential direction, and S poles and N poles are alternately magnetized. The first ring-shaped magnet 2a is magnetized so that different magnetic poles are formed in the radial direction. That is, the first ring magnet 2a is magnetized to opposite poles on the outer peripheral side and the inner peripheral side of the first ring magnet 2a by radial magnetization. The second ring-shaped magnet 2b is equally divided into 12 parts in the circumferential direction, and S poles and N poles are alternately magnetized. The second ring magnet 2b is magnetized so that different magnetic poles are formed in the axial direction. That is, the second ring-shaped magnet 2b is magnetized to opposite poles on the front and back surfaces of the second ring-shaped magnet 2b by plane magnetization. The magnetic pole formation phase of the first ring magnet 2a and the magnetic pole formation phase of the second ring magnet 2b are matched.

4 is a back plan view showing the positional relationship among the magnet unit 2, the stator 3 and the rotation detecting element 9 in the information input device 10. Like FIG. 3, the magnet unit 2 shown in FIG. The state seen from) is shown. The rotation detection element 9 includes two sensors 9a and 9b inside. The sensors 9a and 9b are specifically Hall elements and face each other at a position shifted by a half pitch in the magnetization phase of the second ring-shaped magnet 2b. That is, when the sensor 9a faces the magnetic pole center, the sensor 9b faces the magnetic pole boundary. When the sensor 9a faces the magnetic pole boundary, the sensor 9b faces the magnetic pole center. Thus, the amount of rotation and the direction of rotation of the operation member 1 can be detected by the sensors 9a and 9b detecting the magnetic flux of the second ring-shaped magnet 2b.

The magnet unit 2 is stably stationary by the magnetic attractive force at a position where the magnetic pole center of the first ring-shaped magnet 2a coincides with the tooth width centers of the outer magnetic pole teeth 3a and the inner magnetic pole teeth 3b of the stator 3. That is, this stationary position becomes the cogging stable position, and the operation member 1 to which the magnet unit 2 is fixed is stationary at this position. At this time, the rotation detecting element 9 is in a state where the sensor 9a coincides with the magnetic pole center of the second ring magnet 2b and the sensor 9b coincides with the magnetic pole boundary of the second ring magnet 2b.

Thereafter, the position when the operation member 1 is further rotated by 15 degrees at the mechanical angle, that is, the magnetic pole center of the first ring-shaped magnet 2a and the tooth width centers of the outer magnetic pole teeth 3a and the inner magnetic pole teeth 3b again coincide. In the position, the first ring-shaped magnet 2a (magnet unit 2) rests stably again. In other words, the first ring-shaped magnet 2a (magnet unit 2) in a stationary state is brought into a stationary state again by rotating the operation member 1 by an angle corresponding to one phase of magnetization of the first ring-shaped magnet 2a. Therefore, if one of the outer magnetic pole teeth 3a and the inner magnetic pole teeth 3b faces the S pole of the first ring-shaped magnet 2a before the rotation of the first ring-shaped magnet 2a, The stable stationary state is when one of the magnetic pole teeth faces the north pole of the first ring magnet 2a.

Claims (7)

An operation member to be rotated,
Has a ring shape, a different magnetic poles formed in the radial direction, a first magnet that is fixed to the operating member,
Has a ring shape, the radial direction different magnetic poles in the axial direction perpendicular is formed, and a second magnet fixed to the operating member such that the first magnet and concentric,
A stator having opposite magnetic pole teeth in said first magnetic pole and said radial magnet,
Information input apparatus characterized by and a rotation detecting element which faces the second magnet in the axial direction. The magnetic poles in the first magnet are formed in two layers in the radial direction,
The information input device according to claim 1, wherein the magnetic poles of the second magnet are formed in two layers in the axial direction. The first in magnets, and the S and N poles are formed alternately in the circumferential direction,
The second in the magnet, and the S and N poles are formed alternately in the circumferential direction,
Information input device according to claim 1 or 2, characterized in that said first magnet magnetic pole forming phase and said second magnet pole formed are in phase. It said first magnet and said second magnet, the information input device according to any one of claims 1 to 3, characterized in Tei Rukoto are connected by a connecting portion. The stator, as the magnetic pole teeth, wherein the outer magnetic pole teeth arranged on the outside of the first magnet, the inside is disposed so as to face the Oite said outer magnetic pole teeth on the inside of the first magnet With magnetic pole teeth,
The inner magnetic pole teeth, wherein in the vicinity of the rotation detecting element, an information input device according to any one of claims 1 to 4, characterized in that only one tooth fewer than the outer magnetic pole tooth. Number magnetic poles formed in the circumferential direction of the second its in magnets, the claim 1, wherein in said first magnet is a natural number times the number of magnetic poles formed in the circumferential direction of its 6. The information input device according to any one of items 1 to 5 . An electronic apparatus, comprising an information input device according to any one of claims 1 to 6.