JPH0983402A - Portable telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the convenience of use and the operability of the portable telephone set and to reduce the cost. SOLUTION: A 1st key group 10 and a 2nd key group 20 are arranged to both sides of a case 9 except the middle position of the case, the 1st key group 10 are operation keys and the 2nd key group 20 are shift keys to change the allocation of the operation keys. The shape of the case is devised in matching with the shape of a human hand, the operation keys of the key group are not projected from the surface of the case 9, the portable telephone set is accustomed to the user's hand by matching the shape of the case with the shape of human hand and the positions of the operation buttons are devised so that the operation buttons are operated by a minimum motion of fingers. Thus, the operability is improved, plural functions are provided to one operation key by using the shift keys thereby reducing the number of the operation keys.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile phone, and more particularly to a mobile phone with improved operability.

[0002]

2. Description of the Related Art A conventional mobile phone will be described with reference to FIGS.

As shown in FIG. 4, the shape of the conventional portable telephone and the arrangement of the operation buttons are such that the operation button group 2 is arranged at the substantially central portion of the front surface of a flat and vertically long rectangular parallelepiped case 1.
A display unit 3 and a speaker 4 are provided above the operation button group 2, a microphone 5 is provided below the operation button group 2, and an antenna 6 is provided on the upper surface of the case 1.
Further, the back surface of the case 1 was flat or slightly curved as seen in FIGS.

[0004]

However, in the above-mentioned conventional portable telephone, the operation button group 2 is composed of ten keys or function keys, the number of keys is large, and the case 1 is simply flat and vertically long. Since it is a rectangular parallelepiped shape and the shape of the human hand is not taken into consideration, there is no fit. Therefore,
There was a problem that the usability and operability were not good.

In view of the above situation, the present invention intends to improve the usability and operability of a mobile phone and further reduce the number of keys to reduce the cost.

[0006]

According to the present invention, a first key group and a second key group are provided on both sides of a case except a central portion,
Alternatively, the first key group is the operation keys, and the second key group is the shift keys for changing the assignment of the operation keys.
Further, the present invention relates to a mobile phone in which the shape of the case is recessed according to the shape of a human hand, and the operation keys of the key group are further provided so as not to protrude from the surface of the recess.

Since the case conforms to the shape of a person's hand, the mobile phone and the hand are familiar with each other, and the position of the operation button can be operated with the minimum movement of the finger, so that the operability is improved and the shift key is operated. By the existence, one operation key can have a plurality of functions, and the number of keys can be reduced.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, the same parts as those shown in FIG. 4 are designated by the same reference numerals.

The case 9 has a curved surface both on the front side and the back side, and the first key group 10 and the second key group 20 are arranged in a row along both sides of the substantially central portion of the front surface. The display unit 3 and the speaker 4 are provided on the upper side of the unit.

The first key group 10 includes operation keys 11 and 1.
2, 3, ..., The second key group 20 is a shift key 21, 2 for changing the assignment of the operation keys.
It is a set of 2, ...

When the shift key 21 is pressed, the operation keys 11, 12, 13, ... Are 0, 1, 2, 3, 4
When the shift key 22 is pressed, the operation keys 11, 12, 13, ... Become 5, 6, 7, 8, 9 dial buttons, and so on.

As described above, since the front surface and the back surface are curved, they fit comfortably in the hand, there is little fatigue when operated for a long time, and accidents that accidentally fall during operation can be prevented. Further, since the first key group 10 and the second key group 20 are provided on the side of the case 9, the operation keys 11, 12, 13, ... There are 21, 22, ..., The operability is remarkably good without the need to grasp the mobile phone by key operation.

Further, since the operation assignment of the case 10 can be changed by operating the shift key of the second key group 20, the number of operation keys can be reduced, the number of parts can be reduced, and the production cost can be reduced. Is reduced.

Next, FIGS. 2 and 3 show another embodiment of the present invention in which the case 1 is further recessed so as to fit in the shape of a hand. That is, the part corresponding to the tip part from the index finger to the little finger is recessed according to the shape of the finger to form the recessed parts 30, 31, 32, 33, and the part corresponding to the base of the thumb of the palm is formed. The recessed portion 34 is formed in accordance with the shape of the above, and the recessed portion 34 is formed, and the back surface of the case 9 is shaped to match the shape of the palm.

Therefore, when the mobile phone is gripped, it fits comfortably in the hand, and fatigue is significantly reduced even when used for a long time. Further, if the first key group 10 and the second key group 20 are provided in the recessed portions 30, 31, 32, 33 and the recessed portion 34, button operation can be further facilitated and erroneous operation can be prevented. Furthermore, if the buttons of the first key group 10 and the second key group 20 are provided so as not to project from the recessed surface, an unintended erroneous operation can be prevented.

The first key group 10 and the second key group 20
May be provided on the side surface of the case 9 instead of the side portion.

[0018]

As described above, according to the present invention, due to the shape of the case and the arrangement of the operation keys, which are suitable for the shape of a human hand, there is little fatigue even when used for a long time, and a shift key for allocating an operation function is provided. The adoption reduces the number of operation buttons,
Since the number of parts is reduced and the production cost can be reduced, and since the operation button does not protrude from the surface of the recess, erroneous operation can be prevented.

[Brief description of drawings]

FIG. 1 is a front perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view from the front showing another embodiment of the present invention.

FIG. 3 is a rear view of the same.

FIG. 4 is a front perspective view of a conventional example.

FIG. 5 is a perspective view from the front rear side.

FIG. 6 is a rear perspective view of another conventional example.

[Explanation of symbols]

 3 display part 4 speaker 9 case 10 key group 20 key group 30 recessed part 31 recessed part 32 recessed part 33 recessed part 34 recessed part

Claims (4)

[Claims] 1. A mobile phone having a first key group and a second key group disposed on both sides of the case excluding the central portion. 2. The mobile phone according to claim 1, wherein the first key group is operation keys, and the second key group is shift keys for changing the allocation of the operation keys. 3. The mobile phone according to claim 1, wherein the case has a shape corresponding to the shape of a human hand and is recessed. 4. The mobile phone according to claim 1, wherein the operation keys of the key group are provided so as not to protrude from the recessed surface.