JP2766074B2 - Mobile phone - Google Patents

Description

Description: TECHNICAL FIELD The present invention generally relates to a mobile phone, and more particularly, to a case structure of a mobile phone having a cover. The term mobile phone used in this specification includes a general cordless phone.

BACKGROUND ART It goes without saying that the ultimate purpose of communication is to communicate will or information to anyone at any time, from anywhere,
Or, they can be exchanged, and mobile communication has been gradually developed in addition to conventional fixed point mutual communication. Mobile communication is communication between mobile objects (including people) such as ships, automobiles and airplanes, general subscriber telephones, offices, etc., and communication between mobile objects. In recent years, mobile communication is a type of mobile communication. Telephones and cordless telephones are being actively developed.

In general, telephones are used with the earpiece placed against the ear and the mouthpiece close to the mouth, so it is necessary to secure a sufficient distance between the earpiece and the mouthpiece, even for a mobile phone. Was somewhat long and large.

Further, a mobile phone provided with a foldable cover for protecting the switch section of the mobile phone has also been proposed. In this case, a microphone is provided on the cover side to ensure a sufficient distance between the speaker and the microphone. Care.

As described above, in the conventional mobile phone, the distance between the receiver and the transmitter provided on the phone body is approximately equal to the distance between the ear and the mouth of the user. there were. In addition, the manufacturing technology of each component constituting the mobile phone has advanced and small and inexpensive components have been supplied. From this viewpoint, the miniaturization of the mobile phone is relatively easy.
Since there is an ergonomic requirement to secure a sufficient distance between the ear and the mouth between the receiver and the transmitter, this has been a factor that hinders miniaturization.

In the case of a conventionally proposed mobile phone having a foldable cover, since the microphone is provided on the cover side, there has been a problem that the cord of the microphone is liable to be broken during repeated opening and closing of the cover.

Accordingly, an object of the present invention is to provide a mobile phone which overcomes the above-mentioned problems of the prior art and which can secure a sufficient distance between the receiver and the transmitter when the phone is used, even if the phone body is sufficiently small. It is to be.

It is another object of the present invention to provide a mobile phone that can protect the switch unit when not in use and improve the S / N characteristics of the transmission unit when in use.

DISCLOSURE OF THE INVENTION According to one aspect of the present invention, a main body provided with a speaker, a microphone, and switch means, a cover rotatably attached to the main body and covering at least the switch means when closed, And a cover holding means including biasing means for holding the cover rotatably with respect to the main body and for positioning the cover at a stable position in the rotation direction by the biasing force of the biasing means when the cover is opened. A telephone is provided.

Preferably, the cover holding means is a cover mounting projection having a pair of holes formed integrally with the main body, and is rotatably inserted into each of the holes, one end of which is fixed to the cover and the other end of which is fixed. It is composed of a pair of shafts having a flat portion in the vicinity, and a pair of U-shaped springs fixed to the main body so as to sandwich the flat portion of each shaft.

When the telephone is used, when the cover is opened, the cover is held at a stable position inclined at a predetermined angle (for example, 145 °) with respect to the main body by the cover holding means. In this stable position,
The cover can function as a sound collecting plate.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a mobile phone according to an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is an exploded perspective view showing an embodiment of an attachment mechanism for a cover of an upper case. FIG. 4, FIG. 4 is a sectional view showing step by step the open / closed state of the cover attached to the upper case, FIG. 5 is a rear view of the upper case of FIG. 4, with the cover closed, FIGS. FIG. 6C is a sectional view taken along the line AA of FIG. 5, and each figure corresponds to the case where the cover is at the position of “a”, “b”, and “c” in FIG.

FIG. 7 is a sectional view showing another embodiment of the cover mounting mechanism of the present invention, FIG. 8 is a view of the wavy cam as viewed in the direction of arrow B in FIG. 7, and FIG. 9 is a front view of the wavy cam.

BEST MODE FOR CARRYING OUT THE INVENTION First, a schematic arrangement of a mobile phone according to the present invention will be described with reference to FIG. 1 and FIG. 1 and 2 show the mobile phone with the cover opened. Cell phone case 2 is upper case 2a and lower case
2b, a receiving section 4 accommodating a speaker is provided at the upper end of the case 2, and a display section 6 such as a liquid crystal display and a dial function are provided at an intermediate portion of the case 2. A switch section 8 is provided.
At the left end of the lower end of the case 2, there is provided a transmitter 10 in which a microphone is housed. The reason why the transmitting section 10 is not provided at the center of the lower end of the case 2 but at the corner of the lower end is that the distance between the receiving section 4 and the transmitting section 10 is increased as much as possible in the downsized telephone case 2. Because there is.

Reference numeral 12 denotes an antenna that is attached to the side of the case 2 so as to be able to be pulled out. A cover 14 is rotatably mounted near the lower part of the case 2, and covers at least the switch unit 8 when closed, and functions as a sound collecting plate for the microphone 10 when opened. The cover 14 is rotatably attached to the case 2, but is stably held at a position inclined at a predetermined angle with respect to the case 2 by a cover holding mechanism described later. As best shown in FIG. 1, on both sides of the cover 14, gripping projections 16 are formed integrally with the cover. The provision of such a gripping projection 16 may make it difficult to quickly open the cover 14 when a call is received or the like because the cover 14 is thin.
To prevent this, place your finger on the
14 is easy to open.

FIG. 3 is an exploded perspective view of the first embodiment of the cover holding mechanism, showing a state in which the upper case 2a is viewed from the rear side. A pair of circular holes 20 are provided at both ends of the upper case 2a.
Is formed integrally with the case. The upper case 2a is further provided with a pair of engaging projections 22 for engaging a U-shaped spring described later.

Reference numeral 24 denotes a shaft for rotatably attaching the cover 14 to the upper case 2a, and a mounting portion which is press-fitted into a hole 29 provided in a mounting projection 28 formed integrally with the cover 14 at one end thereof.
24a are formed. A pair of annular lands 24b is formed at the other end of the shaft 24.A flat plate portion 24c for stably holding the cover 14 at a predetermined angle with respect to the upper case 2a is formed between the two annular lands 24b. It is defined. The flat portion 24c has a U-shaped spring 26 having a curved portion 26a at one end.
Are fitted.

To attach the cover 14 to the upper case 2a, first
The shaft 24 is pressed into the hole 29 of the cover 14 through the hole 20 of the upper case 2a with the 14 holes 29 aligned with the holes 20 of the upper case 2a. Next, the U-shaped spring 26 is connected to the flat portion 24 of the shaft 24.
c, and the curved portion 26a is engaged with the engaging projection 22 of the upper case 2a.
Engages. Thus, the cover 14 is rotatably attached to the upper case 2a.

FIG. 4 is a sectional view showing a state in which the cover 14 is rotatably attached to the upper case 2a, and FIG. 5 is a rear view of FIG.

Next, the operation of the cover holding mechanism will be described with reference to FIGS. 6A to 6C. In this embodiment, the stable position of the cover 14 is such that the cover 14 is inclined by 145 ° with respect to the upper case 2a as shown in FIG.
Is in this stable position, as shown in FIG.
The shape spring 26 comes into close contact with the two flat surfaces 25a of the flat plate portion 24c of the shaft 24. An inclined surface 25b is formed continuously at one end of the flat surface 25a, thereby allowing the cover 14 to rotate smoothly.

FIG. 6A shows a state in which the cover 14 is closed, that is, a state shown in FIG. 4A, in which the U-shaped spring 26 moves the cover 14 through the flat plate-like portion 24c of the shaft to the upper case 2a.
Acts to press against. Therefore, a lock mechanism for maintaining the closed state of the cover 14 is unnecessary, and the operability is good in practice.

On the other hand, FIG. 6C shows the cover against the urging force of the U-shaped spring 26.
14 is fully opened, that is, the cover 14 is in the state shown in FIG.
In this state, the U-shaped spring 26 biases the cover 14 in the closing direction via the flat plate portion 24c of the shaft, and the cover 14 is elastically held. . Therefore, for example, when the mobile phone is placed on a flat surface such as a desk or the like with the switch unit being on the lower side with the cover 14 opened, and the load is applied to the mobile phone, the cover 14 6C against the urging force of the shape spring 26, there is no danger of the cover 14 being damaged. In the present embodiment, the angle between the flat surface 25a of the flat portion 24c of the shaft 24 and the cover 14 is 55 °, whereby the cover 14 is stabilized at a position inclined by 145 ° with respect to the upper case 2a.

In this embodiment, a flat plate portion is provided near the end of the shaft 24.
Forming 24c and setting only one stable position,
The vicinity of the end of the shaft may be formed in a polygonal cross-sectional shape so that a plurality of stable points are present. In this embodiment, the cover 14 moves the stable position of the cover 14 relative to the upper case 2a.
The reason for setting the position to be inclined at 145 ° is that the S / N characteristic in the transmitting section is maximized when a call is performed in this state.

FIG. 7 is a sectional view of a cover holding mechanism according to a second embodiment of the present invention, and its sectional position is taken along the line BB in FIG. A cylindrical member 32 is rotatably inserted into circular holes 20 formed at both ends of the mounting projection 18 of the case 2. Reference numeral 30 denotes a pipe shaft inserted and fixed in the cylindrical member 32, and a wavy cam 40 is formed at an end of the pipe shaft 30. Each cylindrical member 32 has a cover 14
Is fixedly inserted into the mounting portion 34 of the main body. 36 is a pipe shaft
30, a pin for preventing mutual rotation of the cylindrical member 32 and the mounting portion 34 of the cover, and this pin 36 is fixed so as to penetrate the mounting portion 34 of the cover 14, the cylindrical member 32 and the pipe shaft 30. Have been. Reference numeral 38 denotes a spring member made of an elastic metal provided so as not to rotate inside the case 2. Both ends of the spring member 38 are inserted into the respective pipe shafts 30 and formed near the ends. L-shaped curved part
38a is engaged with the wavy cam 40.

When the L-shaped curved portion 38a of the spring member 38 is seated on the valley of the wavy cam 40, the spring member 38 does not elastically deform, so that the urging force of the spring member 38 does not act on the pipe shaft 30 at this time. On the other hand, when the L-shaped curved portion 38a of the spring member is in contact with the vicinity of the peak of the wavy cam 40, the L-shaped curved portion
In FIG. 7, 38a is elastically deformed in the center direction, and the urging force of the spring member 38 due to this elastic deformation acts on the pipe shaft 30.

FIG. 8 is a view of the wavy cam 40 shown on the left side in FIG. 7 as viewed in the direction of arrow B, and FIG. 9 is a front view thereof. Wavy cam
42 has a crest 40a, a valley 40b, a crest 40c, and a valley 40d formed in this order in the circumferential direction. L-shaped curved portion 38a of the spring member
Is seated in the valley portion 40b of the wavy cam as shown by the broken line in FIG. 9, the cover 14 is in a stable position, and the plane D parallel to the cover 14 is at this time relative to the plane C parallel to the case 2.
145 ° inclined. On the other hand, when the L-shaped curved portion 38a of the spring member 38 is on the surface C, that is, when the cover 14 is closed as shown by a solid line in FIG.
Since the curved portion 38a contacts the wavy cam 40 at a position between the peak 40a and the valley 40d of the wavy cam, the urging force of the spring member 38 acts in the direction to close the cover 14 via the wavy cam 40. .

As described above, also in the present embodiment, it is possible to provide a mobile phone that is not liable to be damaged as in the case of the first embodiment and that has good operability in practical use. According to the first and second embodiments, the cover 14 functions as a reflection sound collecting plate when a call is made with the cover 14 opened, so that it is possible to improve the S / N characteristics in the transmitting section. Therefore,
The size of the mobile phone can be reduced by bringing the transmission unit and the reception unit of the mobile phone close to each other.

INDUSTRIAL APPLICABILITY According to the present invention, since the cover is rotatably attached to the mobile phone case by the cover holding mechanism, the switch portion of the mobile phone can be protected when the cover is closed. Further, when the cover is opened, the cover can be stably held at a predetermined angle (for example, 145 °) with respect to the case, so that the cover can function as a reflection sound collecting plate, and the S / S N characteristics can be improved. This makes it possible to provide a small-sized mobile phone having good S / N characteristics.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-159159 (JP, A) JP-A 61-7145 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04M 1/02

Claims (7)

(57) [Claims] A main body provided with a speaker and switch means; a cover rotatably attached to the main body, which covers at least the switch means when closed; and a cover rotatable with respect to the main body. Holding means for holding the cover when the cover is opened, and urging the cover to a stable position in the rotation direction by the urging force of the urging means. A cover mounting portion having a hole formed integrally with the shaft, a shaft having a flat portion rotatably inserted into the hole and having an end fixed to the cover, and a flat portion of the shaft. And a spring member fixed to the main body so as to be sandwiched. 2. A main body provided with a speaker and switch means, a cover rotatably attached to the main body and covering at least the switch means when closed, and a cover rotatable with respect to the main body. Holding means for holding the cover when the cover is opened, and urging the cover to a stable position in the rotation direction by the urging force of the urging means. A cover mounting portion having a pair of holes integrally formed with the shaft, and a pair of shafts rotatably inserted into the respective holes, one end of which is fixed to the cover and has a flat portion near the other end. And a pair of spring members fixed to the main body so as to sandwich the flat portions of the shafts. 3. An angle between the flat portion of the shaft and the cover so that the urging force of the spring member acts to press the cover against the main body when the cover is closed. The mobile phone according to claim 1 or 2, wherein 4. The portable telephone according to claim 1, wherein the microphone is provided on the main body near the mounting portion of the cover, and the cover functions as a reflection sound collecting plate for the microphone when opened. 5. A main body provided with a speaker and switch means, a cover rotatably attached to the main body, and covering at least the switch means when closed, and a cover rotatable with respect to the main body. Holding means for holding the cover when the cover is opened, and urging the cover to a stable position in the rotation direction by the urging force of the urging means. A cover mounting portion having a pair of holes integrally formed with the cover shaft, and a pair of pipe shafts rotatably inserted into the respective holes, one end of which is fixed to the cover and the other end of which has a wavy cam. And having L-shaped curved portions near both ends which are inserted into the respective pipe shafts and engage with the respective wavy cams,
And a spring member for applying a pressure to each pipe shaft in an axial direction thereof. 6. The shape of each of said wavy cams and the positional relationship of said spring members with respect to said wavy cams so that the urging force of said spring member acts to press said cover against said body when said cover is closed. Claim 5 is set.
The described mobile phone. 7. A main body provided with a speaker and a switch means, a cover rotatably attached to the main body and covering at least the switch means when closed, and a cover rotatable with respect to the main body. Cover holding means including an urging means for holding the cover at a stable position in the rotation direction by the urging force of the urging means when the cover is opened; and And a gripping projection protruding from the mobile phone.