Input device and electronic apparatus

1. An input device that inputs information by a slide operation depending on an operation body, the device comprising:

a housing including an operation surface;

a detection unit that is provided in the housing and detects a slide position inputted by a slide operation depending on the operation body; and

an operation unit that covers at least a portion of the detection unit and is slide-operated along the operation surface of the housing,

wherein the operation unit has a convex shape which becomes thicker along the sliding direction from one portion of the operation surface of the housing and also which becomes thinner toward the other portion of the operation surface thereof.

2. The input device according to claim 1 , wherein a detection area in the detection unit, the detection area detecting the slide position of the operation body, is wider than an operation area in the operation unit, the operation area being slide-operated by the operation body.

3. The input device according to claim 2 , wherein the convex shape of the operation unit forms an arc having predetermined height and width, and

wherein the operation unit is slide-operated along a shape of the arc.

4. The input device according to claim 2 , wherein the convex shape of the operation unit forms a hemisphere having predetermined height and width, and

wherein the operation unit is slide-operated along at least one of one orbit of a shape of the hemisphere and another orbit intersecting with the orbit.

5. The input device according to claim 2 , wherein the operation unit is constituted by a material that is different from a material of the housing,

Wherein surface roughness of the material constituting the operation unit is less than surface roughness of the material constituting the housing.

6. The input device according to claim 2 , wherein the operation unit is mounted on the housing detachably.

7. The input device according to claim 2 , wherein the detection unit includes an electrostatic capacitance sheet member that detects the slide position of the operation body to output a position detection signal.

8. The input device according to claim 2 , wherein the detection unit includes a pressure detecting sheet member that detects a pressure of the slide position of the operation body to output a pressure detection signal.

9. The input device according to claim 2 , further comprising a switch portion that is switched by a press-in operation of the operation unit.

10. The input device according to claim 9 , wherein the switch portion is provided at a pressing projection lower portion of the operation unit or at a position other than the pressing projection lower portion of the operation unit.

11. The input device according to claim 2 , wherein a vibration body generating vibration is provided with respect to the slide position of the operation body, which is detected by the detection unit.

12. The input device according to claim 2 , further comprising:

a display unit that displays a scroll image with respect to the slide position of the operation body, the slide position being detected by the detection unit; and

a control unit that detects the slide operation speed of the operation body and adjusts a display pitch of the scroll image on the display unit in response to the slide operation speed of the operation body.

13. The input device according to claim 2 further comprising:

a display unit that displays an image based on the slide position inputted by the operation unit; and

a control unit that performs a display control of the image displayed on the display unit,

wherein the control unit calculates any one of speed and acceleration of the operation body based on the slide position detected by the detection unit and adjusts amount of movement of the image displayed on the display unit in response to any one of the calculated speed and the calculated acceleration.

14. The input device according to claim 13 , wherein the control unit calculates amount of movement of the operation body from the slide position of the operation body, the slide position being detected by the detection unit, and determines whether or not the slide position inputted by the operation body is caused by a malfunction based on a comparison result between the calculated amount of movement of the operation body and a preset threshold value.

15. An electronic apparatus comprising:

a housing having an operation surface; and

an input device that is provided at the housing and inputs information by a slide operation depending on an operation body,

wherein the input device includes:

a detection unit that is provided in the housing and detects the slide position of the operation body; and

an operation unit that covers at least a portion of the detection unit and is slide-operated along an operation surface of the housing, and

wherein the operation unit includes a convex shape which becomes thicker along a sliding direction from one portion of the operation surface of the housing and also which becomes thinner toward the other portion of the operation surface thereof.

16. The electronic apparatus according to claim 15 , wherein the housing and the operation unit are formed integrally.

17. The electronic apparatus according to claim 16 , wherein a ten-key portion is provided on the operation surface of the housing, and

wherein the operation unit is formed by being molded integrally with the ten-key portion.

18. The electronic apparatus according to claim 16 , wherein a light source is provided in the housing and the operation unit is provided with a photoconductive member, and

wherein light is illuminated from the light source in the housing to the photoconductive member.

19. The electronic apparatus according to claim 16 further comprising a display unit that displays information inputted by the operation unit,

wherein the operation unit forming a convex shape is arranged at a predetermined position of the display unit.