Input and output operation device

Patent metadata

Field	Value
Publication number	US-9958968-B2
Application number	US-201415102906-A
Country	US
Kind code	B2
Filing date	Dec 11, 2014
Priority date	Dec 12, 2013
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

An input and output operation device includes an actuator 165 including an operation unit 850 ; a movable unit having the operation unit and at least one attraction magnet mounted thereon and including a concaved portion in a part thereof; a secured unit including a convexed spherical surface loosely engageable with at least one magnetic member and the concaved portion of the movable unit, the convexed spherical surface being point-contactable or line-contactable with the concaved portion of the movable unit by a magnetic attraction force, the secured unit supporting the movable unit such that the movable unit is freely rotatable as centered around a spherical center of the convexed spherical surface; a first driving unit rotating the operation unit as centered around an X-axis passing the spherical center; a second driving unit rotating the operation unit as centered around a Y-axis perpendicular to the X-axis; a third driving unit rotating the movable unit as centered around a Z-axis that is perpendicular to the X-axis and the Y-axis and is a central axis of the operation unit; and a detector detecting a first rotation angle and a second rotation angle of the operation unit around the X-axis and the Y-axis; and also includes a detection circuit unit 360 generating first and second rotation angle signals; a control computation processing unit 94 generating first and second target rotation angle signals; and a driving circuit unit 350 generating a signal usable to drive the first and second driving units.

First claim

The invention claimed is:

1. An input and output operation device, comprising:
(i) an actuator including:
an operation unit having an operation surface;
a movable unit having the operation unit and at least one attraction magnet mounted thereon and including a concaved portion in a part thereof;
a secured unit including at least one magnetic member and a convexed spherical surface loosely engageable with the concaved portion of the movable unit, the convexed spherical surface being in point-contact or line-contact with the concaved portion of the movable unit by a magnetic attraction force between the at least one attraction magnet and the at least one magnetic member, the secured unit supporting the movable unit such that the movable unit is freely rotatable as centered around a spherical center of the convexed spherical surface;
a first driving unit rotating the operation unit, with respect to the secured unit, as centered around an X-axis passing the spherical center;
a second driving unit rotating the operation unit, with respect to the secured unit, as centered around a Y-axis perpendicular to the X-axis on a plane including the X-axis; and
a detector detecting a first rotation angle of the operation unit, with respect to the secured unit, around the X-axis and a second rotation angle of the operation unit, with respect to the secured unit, around the Y-axis;
wherein the spherical center of the convexed spherical surface is provided at an origin of the X-axis and the Y-axis; and

(ii) a detection circuit unit generating first and second rotation angle signals from the first and second rotation angles.

2. The input and output operation device according to claim 1 , further comprising:
a control computation processing unit generating first and second target rotation angle signals based on the first and second rotation angle signals; and
a driving circuit unit receiving the first and second target rotation angle signals and generating a signal usable to drive the first and second driving units.

3. The input and output operation device according to claim 2 , wherein the control computation processing unit generates a current position coordinate pair of the operation unit in a two-dimensional coordinate system corresponding to a movable range of the operation unit based on the first and second rotation angle signals, and generates the first and second target rotation angle signals based on a position feedback control performed by use of a difference between a target position coordinate pair and the current position coordinate pair.

4. The input and output operation device according to claim 3 , wherein the control computation processing unit sets, in the two-dimensional coordinate system, an identification coordinate area including the target position coordinate pair and being usable as a target; and in the case where the current position coordinate pair of the operation unit is inside the identification coordinate area, sets a first gain of the position feedback control, whereas in the case where the current position coordinate pair of the operation unit is outside the identification coordinate area, sets a gain larger than the first gain.

5. The input and output operation device according to claim 4 , wherein the control computation processing unit:
sets a plurality of identification coordinate areas to be targets in the two-dimensional coordinate system;
sets the target position coordinate pair in one identification coordinate area selected from the plurality of identification coordinate areas in accordance with the current position coordinate pair of the operation unit or an external signal; and
in the case where the current position coordinate pair of the operation unit is inside the identification coordinate area, sets the first gain of the position feedback control, whereas in the case where the current position coordinate pair of the operation unit is outside the identification coordinate area, sets a gain large than the first gain.

6. The input and output operation device according to claim 3 , wherein the actuator includes a third driving unit rotating the movable unit, with respect to the secured unit, as centered around a Z-axis perpendicular to the X-axis and the Y-axis, the Z-axis being a central axis of the operation unit, the spherical center of the convexed spherical surface is provided at an origin of the X-axis, the Y-axis and the Z-axis.

7. The input and output operation device according to claim 6 , wherein:
the control computation processing unit generates a driving signal having a predetermined driving waveform pattern;
the driving circuit unit receives the driving signal and generates a signal usable to drive the third driving unit; and
the movable unit is driven to vibrate around the Z-axis by the third driving unit.

8. The input and output operation device according to claim 7 , wherein the predetermined driving waveform pattern includes a vibration waveform having a frequency component in an audible range.

9. The input and output operation device according to claim 6 , wherein the detector includes:
a first detection unit detecting the rotation angles of the operation unit, with respect to the secured unit, around the X-axis and the Y-axis; and
a second detection unit detecting a rotation angle of the operation unit, with respect to the secured unit, around the Z-axis.

10. The input and output operation device according to claim 6 , wherein:
the first driving unit includes:
a pair of first driving magnets located in the movable unit symmetrically with respect to the Z-axis;
a pair of first magnetic yokes located in the secured unit so as to respectively face the pair of first driving magnets; and
a pair of first driving coils respectively wound around the pair of first magnetic yokes;

the second driving unit includes:
a pair of second driving magnets located in the movable unit symmetrically with respect to the Z-axis;
a pair of second magnetic yokes located in the secured unit so as to respectively face the pair of second driving magnets; and
a pair of second driving coils respectively wound around the pair of second magnetic yokes;

the pair of first driving magnets and the pair of first driving coils are located on a straight line passing the spherical center of the convexed spherical surface;
the pair of second driving magnets and the pair of second driving coils are located on another straight line passing the spherical center of the convexed spherical surface and crossing the straight line perpendicularly; and
a center between the first driving magnets, a center between the first driving coils, a center between the second driving magnets, and a center between the second driving coils in the Z-axis direction substantially match the spherical center of the convexed spherical surface positionally.

11. The input and output operation device according to claim 10 , wherein:
the third driving unit includes third driving coils respectively wound around the pair of first magnetic yokes and the pair of second magnetic yokes; and
the pair of first driving magnets and the pair of second driving magnets are used as third driving magnets.

12. The input and output operation device according to claim 10 , wherein the pair of first driving magnets and the pair of second driving magnets are respectively coupled together by a pair of magnetic back yokes, and the pair of magnetic back yokes are provided on the side of the spherical center with respect to the movable unit.

13. The input and output operation device according to claim 10 , wherein the at least one magnetic member includes the pair of first

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Kumahara Minoru
• Mori Takuya
• Takizawa Teruyuki
• Nakazawa Takeshi
• Seki Jiro

Classifications

• G06F3/0383

  Signal control means within the pointing device · CPC title

• H01H50/643

  intermediate part performing a rotating or pivoting movement (H01H50/645, H01H50/66 - H01H50/74 take precedence) · CPC title

• H01H50/44

  Magnetic coils or windings · CPC title

• G06F3/038 Primary

  Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry · CPC title

• G06F3/03549

  Trackballs (G06F3/03541 takes precedence) · CPC title