JP2837317B2 - Mobile phone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to portable telephones, and more particularly to a portable telephone case structure having a cover. In the specification of the present application, the above-mentioned handset in a cordless telephone comprising a telephone body (base unit) connected to the subscriber line by wire and a handset (child unit) wirelessly connected to the telephone body is included in the portable telephone. Shall be.

2. Description of the Related Art In recent years, a portable telephone has been put into practical use that integrally includes a speaker serving as a receiving section, a microphone serving as a transmitting section, and switch means having a dial function and the like.
This type of mobile phone is required to be small, especially thin. In addition, in order to prevent a malfunction of the switch unit when not in use, it is desirable that the mobile phone be provided with a cover that covers the switch unit when not in use.

[0003]

2. Description of the Related Art Generally, when a portable telephone is used with its earpiece in contact with an ear, the S / N characteristics of the earpiece deteriorate when the mouthpiece is separated from the mouth. In order to secure this characteristic, the distance between the receiver and the transmitter must be substantially equal to the distance between the ear and the mouth to make the mobile phone itself somewhat vertical and large, and the miniaturization is insufficient. .

On the other hand, there has been proposed a portable telephone provided with a foldable cover for protecting a switch section. in this case,
By mounting the microphone on the cover side, a sufficient distance between the microphone and the speaker can be ensured when the cover is opened, so that both a certain degree of downsizing and an improvement in the S / N characteristics in the transmission section are achieved. be able to. However, if a microphone is attached to the cover, there is a disadvantage that the connection cord of the microphone may be disconnected while the cover is repeatedly opened and closed.

[0005] In view of such circumstances, we have previously proposed a portable telephone having a cover which is urged to a stable position when closed and covers the switch unit when opened and functions as a reflection sound collecting plate. (PCT / JP91 / 00253).

[0006]

In a telephone provided with a cover functioning as a reflection sound collecting plate, sufficient S / N characteristics can be obtained even when the transmitting section and the receiving section are brought to some extent for the purpose of miniaturization. However, since a structure for urging the cover to a stable position where the cover functions as a reflection sound collecting plate is required, the reduction in thickness of the mobile phone is not always sufficient.

An object of the present invention is to provide a portable telephone which can obtain a sufficient S / N characteristic even when the transmitting section and the receiving section are brought close to some extent, and which is suitable for thinning.

[0008]

A portable telephone according to the present invention comprises:
A receiving section, a transmitting section and a switch section are provided, a main body having a main body side projection formed at the end on the side of the transmitting section, and a pair of cover side projections arranged so as to sandwich the main body side projection. A cover holding means for pivotally supporting the cover-side projection to the main body-side projection so that the cover covers the switch means when the cover is closed.

A hole is formed in at least one of the pair of cover-side protrusions on the side of the body-side protrusion. The cover holding means is fixed to the cover-side protrusion so as to cover the hole of the cover-side protrusion, and has an annular shape having a cam wave surface projecting into the hole of the cover-side protrusion on a concentric circle with the rotation trajectory of the cover. And a cam, provided in the hole of the cover-side projection so that rotation with respect to the body-side projection is regulated,
A ring having a convex portion that slides on the cam wave surface with rotation of the cover; and a coil spring provided in a hole of the cover-side projection to bias the ring toward the cam.

[0010] The wavefront shape of the cam and the position of the convex portion on the ring are such that the cover is urged toward a stable position when the cover is opened at a predetermined angle with respect to the main body, and the cover is The cover is biased in the closing direction when the cover is closed at a predetermined angle with respect to the main body.

[0011]

According to the structure of the portable telephone of the present invention, since the cam and the ring of a specific shape are used, the cover can be positioned at a stable position and function as a reflection sound collecting plate.
Even when the transmitter and receiver are close to each other, sufficient S /
N characteristics can be obtained.

Further, since a coil spring is used to bias the ring toward the cam, and the coil spring and the ring are housed in the hole of the cover-side projection, the thickness of the mobile phone can be reduced.

Further, since the cam is fixed to the cover-side projection and the coil spring is housed in the hole of the cover-side projection, the biasing force of the coil spring does not act in the direction of separating the cover-side projection from the body-side projection. The distortion of the cover and the like is prevented.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a plan view showing a state where a cover of a mobile phone according to an embodiment of the present invention is closed, and FIG. 2 is a perspective view showing a state where the cover of the mobile phone is opened.

This portable telephone comprises a main body 2 and a cover 4 provided to be openable and closable with respect to the main body 2 by a rotating operation. The main body 2 is attached to the main body 2 from the side opposite to the cover 4.
Antenna 6, which can be pulled out from the telephone, a strap 8, a receiver 10 with a built-in speaker, a volume switch 12 for increasing / decreasing a ringing volume, a display unit 14 with a built-in liquid crystal display, and dial and function selection. A switch unit 16 including a plurality of switches, a transmitting unit 18 having a built-in microphone, and an interface connector 20 used for connection to a vehicle-mounted adapter or an external antenna are provided in this order.

FIG. 3 is an exploded perspective view of the portable telephone shown in FIG. 1 and FIG. The main body 2 is formed by fixing a lower case 2B to an upper case 2A by screwing. Between the upper case 2A and the lower case 2B, there is a printed board unit 22 in which functional components are integrated and an elastic body such as silicone rubber. And a key top 24 for the switch unit 16 composed of

In the printed board unit 22, 26 is an alert buzzer, 28 is a speaker, 30 is a contact for a volume switch, 32 is a key top for a volume switch, 34 is a liquid crystal display, 36 is a contact for the switch unit 16, 3
Reference numeral 8 denotes a microphone.

In the upper case 2A, 40 is the speaker 2
Holes for transmitting the air vibrations from outside to the outside of the main body, 42
Is a hole for the volume switch 12, and 44 is the liquid crystal display 3.
Reference numeral 4 denotes a transparent plate for viewing from outside the main body, 46 denotes a hole for the switch section 16, and 48 denotes a hole for transmitting air vibration outside the main body to the microphone 38.

An antenna holder 50 slidably supporting the antenna 6 is screwed to the lower case 2B, and the battery 5
2 is detachably attached to the lower case 2B. FIG. 4 is an exploded perspective view of the upper case and the cover as viewed from the back side of the upper case in the embodiment of the present invention. Upper case 2A of main body
The main body side projection 54 is formed at the end on the side of the transmitting section of the. The cover 4 has a pair of cover-side protrusions 56 arranged so as to sandwich the body-side protrusion 54. A hole 58 is formed on the cover-side projection 56 on the body-side projection 54 side.
A coil spring 60 and a ring 62 are accommodated in this hole 58 in this order.

The cover side protrusion 56 has the hole 5
An annular cam 64 is fixed so as to cover 8. Therefore, when the cam 64 is fixed to the cover-side projection 56, the urging force in the extending direction by the coil spring 60 does not act on the outside of the cam 64. The cover 4 has a cam 6
4. A shaft member 66 having a shaft 84 passing through the ring 62 and the coil spring 60 is rotatably supported on the main body side projection 54.

FIG. 5A is a front view of the ring 62 of FIG.
FIG. 5B is a side view thereof. On one surface of the ring 62, a pair of convex portions 68 are formed at symmetrical positions. Reference numeral 70 denotes a through hole through which the shaft passes. The through hole 70 has a shape corresponding to the cross-sectional shape of the shaft described later.

FIG. 6A is a front view of the cam 64 shown in FIG. 4, and FIG. 6B is a side view thereof. On one surface of the cam 64, a cam wave surface 72 is formed on a circumference concentric with the rotation locus of the cover 4 (see FIG. 4). Details of the cam wavefront 72 will be described later. Ribs 74, 7 for attaching the cam to the cover-side projection 56 (FIG. 4) are provided on the outer periphery of the cam 64.
6, 78, 80 project. 82 is a circular through hole through which the shaft passes.

FIG. 7A is a front view of the shaft member 66 of FIG. 4, FIG. 7B is a side view thereof, and FIG. 7C is a bottom view thereof. The shaft member 66 includes a substantially cylindrical shaft 84 and a flange 86 formed integrally with the shaft 84 at one end of the shaft 84. Notches 88 and 90 are formed at opposite ends of the end of the flange 86 opposite to the shaft 84.

Also, the shaft 8 is connected to the end face of the flange 86.
A notch 92 is formed in the middle of 4. The notch 92 is formed to facilitate elastic deformation of the shaft member 66 when the shaft member 66 is attached to the main body side projection 54 (FIG. 4).

The shaft 84 has a shape in which a part of a column (parts facing each other) is cut off in parallel with the center line of the column. Therefore, when the shaft 84 is inserted into the through hole 70 of the ring 62 in FIG. 5, the ring 62 does not rotate with respect to the shaft 84.

Referring to FIG. 4 again, how to attach the cover 4 to the upper case 2A will be described. First, the coil spring 60 and the ring 62 are accommodated in the hole 58 of the cover-side projection 56 in this order, and the hole 64 of the cover-side projection 56 is closed by the cam 64. At this time, the convex portion 68 of the ring 62 and the cam wavefront 7 of the cam 64
2 are facing each other.

When the coil spring 60, the ring 62 and the cam 64 are mounted on the cover 4, the cover-side projection 5
The main body side projection 54 is positioned between the main body side projections 54 and 56, and the shaft 84 of the shaft member 66 is inserted into the hole 58 of the cover side projection 56 from the inside of the main body side projection 54 through the opening 94 of the main body side projection 54. I do.

The opening 94 of the main body side projection 54 has a shape corresponding to the flange 86 of the shaft member 66. The shaft member 66 is elastically deformed, and the flange 86 is seated in the opening 94 of the main body side projection 54. , The shaft member 66 is prevented from rotating with respect to the main body side projection 54.
Fixed to At this time, the shaft 84 of the shaft member 66 includes the cam 64, the ring 62, and the coil spring 60.
, And the distal end of the shaft is
Is slidably inserted into a not-shown small-diameter portion at the innermost portion of the hole 58.

According to this structure, the cover 4 can be pivotally supported on the upper case 2A. Also, cover 4
The cam 64 rotates together with the cover 4 along with the rotation of the upper case 2A. On the other hand, the rotation of the ring 62 is restricted with respect to the upper case 2A, and the urging force acting in the direction in which the coil spring 60 itself extends. Acts in a direction in which the convex portion of the ring 62 is pressed against the cam wavefront of the cam 64, so that the urging force of the coil spring 60 is applied to the cover 4 in accordance with the rotational position of the cover 4.
Can be transmitted to

FIG. 8 is a developed view of the cam wavefront of the cam 64. The angle shown in the horizontal direction in FIG. 8 corresponds to the cam 6 in FIG.
4 corresponds to the angle shown in the circumferential direction. Cam 64
Are most concave at 0 ° (360 °) and 180 ° and most prominent at 90 ° and 270 °. The cam wave front has a rotationally symmetric shape about the center of rotation of the cover.

In FIG. 8, the range indicated by reference numeral 96 (5
0 ° to 230 °) represents a range in which one of the pair of protrusions 64 of the ring 62 can come into contact with the cam wavefront. Cover 4
A description will be given below of what kind of urging force is applied to the rotary shaft according to the rotation position.

FIGS. 9A and 9B are views showing the state in which the cover is closed when viewed from a direction perpendicular to and parallel to the shaft, respectively, and FIG. 9A is a view showing FIG. 9B. 9B corresponds to the cross-sectional position taken along the line BB in FIG.
Corresponds to the cross-sectional position of the line AA.

When the cover 4 is in a closed state, one of the two convex portions 68 of the ring 62 has a symbol P _{1 in} FIG.
As shown by, the cam 64 is at a position at 50 ° with respect to the cam wavefront. At this time, the other of the convex portion of the ring 62 is at a position of the 230 ° as indicated at P _3, cover 4,
The urging force of the coil spring 60 is received via the cam 64 and the ring 62 in the direction in which the cover 4 closes. Therefore, a lock mechanism or the like for maintaining the closed state of the cover 4 is unnecessary, and the operability is good in practice.

FIGS. 10A and 10B are views showing the state where the cover is at the stable position, corresponding to FIGS. 9A and 9B. The stable position of the cover 4 is as follows.
This is a position inclined approximately 130 ° with respect to A.

When the cover 4 is in the stable position, the ring 6
One of the two of the two convex portions 68 at the position of 180 ° with respect to the cam plane of the cam 64 as indicated at P ₂ in Figure 8.
The other of the convex portions of the ring 62 is 0 ° (3 °) to the cam wavefront.
60 °).

FIGS. 11A and 11B are views showing a state in which the cover is fully opened, corresponding to FIGS. 9A and 9B. Is a cover 4 into opened maximally, located in one position of 230 ° with respect to the cam plane of the cam 64 as indicated at P ₃ in FIG. 8 of the two protrusions 68 of the ring 62 the other of the convex portion of the ring 62, 5 represented by P ₁
It is located at 0 °.

In this case, if the cover 4 is opened to the maximum and no force is applied to the cover to maintain it, the urging force of the coil spring 60 acts on the cover 4 in the closing direction, and the cover 4 Is displaced to a stable position as shown in FIG.

The above results are summarized as follows.
That is, when one of the protrusions 68 of the ring 62 is at a position of 50 ° to 90 ° with respect to the cam wavefront of the cam 64 (when the angle between the cover and the main body is 0 ° to 40 °), the cover 4 Receives a biasing force in the direction in which the ring
Is in the range of 90 ° to 230 ° with respect to the cam wavefront (the angle between the cover and the main body is 40 ° to 180 °).
In this case, the cover receives the biasing force in the direction in which the cover is located at the stable position.

In the present embodiment, the stable position of the cover is set so that the angle between the cover and the main body is 130 °, when the cover functions as a reflection sound collecting plate in this state. This is because each component is designed to obtain the highest S / N ratio.

According to the present embodiment, since the cover can be opened at a maximum of 180 ° with respect to the main body, the portable telephone is placed on a flat surface such as a desk with the switch section down with the cover open. In this state, when a load is applied from the side opposite to the switch section of the mobile phone, there is no possibility that the cover or the like will be damaged.

According to the present embodiment, two convex portions 68 of the ring 62 are formed at symmetrical positions with respect to each other.
4 has a rotationally symmetrical shape about the center of rotation of the cover, the urging force of the coil spring 60 can be transmitted to the cover 4 effectively, and the ring 62
Is not inclined with respect to the shaft 84, and there is no possibility that the frictional force therebetween increases. It should be noted that only one convex portion of the ring 62 may be formed, and a cam wave front having a shape corresponding to this may be employed.

The means for applying the above-described urging force to the cover 4 may be provided on only one of the two cover-side protrusions 56, or may be provided on both. When both are provided, the biasing force can be doubled.

Furthermore, according to the present embodiment, the cover, the ring, the cam, and the coil spring provided on the cover side are used to apply the urging force to the cover, so that the portable telephone can be significantly thinned.

In addition, since the coil spring and the ring are housed in the cover-side projection hole, the cam closes the cover-side projection hole, so that the biasing force of the coil spring acts only in the direction in which the cover 4 is rotated. It does not act in the direction in which the cover-side projections are expanded, so that there is no danger that undesired stress is applied to the cover to cause distortion or the like, and the assemblability is good.

[0045]

As described above, according to the present invention,
Even when the transmitter and receiver are close to each other, sufficient S /
There is an effect that it is possible to provide a mobile phone that can obtain N characteristics and is suitable for thinning.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state in which a cover of a mobile phone according to an embodiment of the present invention is closed.

FIG. 2 is a perspective view showing a state in which a cover of the mobile phone according to the embodiment of the present invention is opened.

FIG. 3 is an exploded perspective view of the mobile phone according to the embodiment of the present invention.

FIG. 4 is an exploded perspective view of an upper case and a cover in the embodiment of the present invention.

FIG. 5 is a front view and a side view of the ring according to the embodiment of the present invention.

FIG. 6 is a front view and a side view of a cam according to the embodiment of the present invention.

FIG. 7 is a front view, a side view, and a bottom view of the shaft member according to the embodiment of the present invention.

FIG. 8 is a developed view of a cam wavefront in the embodiment of the present invention.

FIG. 9 is a view showing a state where a cover is closed in the embodiment of the present invention.

FIG. 10 is a diagram showing a state where the cover is in a stable position in the embodiment of the present invention.

FIG. 11 is a diagram showing a state in which a cover is fully opened in an embodiment of the present invention.

[Explanation of symbols]

 2 Main Body 2A Main Body Upper Case 2B Main Body Lower Case 4 Cover 54 Main Body Side Projection 56 Cover Side Projection 60 Coil Spring 62 Ring 64 Cam 66 Shaft Member 84 Shaft

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-45980 (JP, A) JP-A-5-508296 (JP, A) JP-A-6-508408 (JP, A) 506767 (JP, a) JitsuHiraku flat 5-68156 (JP, U) (58 ) investigated the field (Int.Cl. ^6, DB name) H04B 7/24 - 7/26 H04Q 7/00 - 7/38 H04M 1/02-1/23

Claims (7)

(57) [Claims] 1. A receiving unit (10), a transmitting unit (18), and a switch unit
(16) is provided, and the main body side projection (5
A cover (4) having a main body (2) formed with 4), a pair of cover-side protrusions (56) arranged so as to sandwich the main body-side protrusion (54), and the cover (4) is closed. A cover holding means for rotatably supporting the cover-side projection (56) on the body-side projection (54) so that the cover (4) covers the switch section (16). A hole (58) is formed on at least one of the pair of cover-side protrusions (56) on the side of the body-side protrusion (54), and the cover holding means is provided with a hole (58) of the cover-side protrusion (56). ) Is fixed to the cover-side protrusion (56) so as to cover the cover-side protrusion (56), and has a cam wave surface projecting into the hole (58) of the cover-side protrusion (56) on a concentric circle with the rotation locus of the cover (4). An annular cam (64) is provided in a hole (58) of the cover-side projection (56) so that rotation with respect to the main-body-side projection (54) is restricted.
A ring (62) having a convex portion (68) that slides on the cam wavefront with rotation of (4), and a ring (62) provided in a hole (58) of the cover-side projection (56). ) Toward the cam (64).
Wherein the wavefront shape of the cam (64) and the position of the projection (68) on the ring (62) are determined when the cover (4) is opened at a predetermined angle with respect to the main body (2). Then, the cover (4) is urged toward the stable position, and the cover (4) is
(2) A portable telephone set so that the cover (4) is biased in a closing direction when the cover (4) is closed at a predetermined angle or more. 2. The apparatus according to claim 1, wherein the cover holding means includes a main body side projection.
A shaft (84) fixed to (54) and passing through the cam (64), the ring (62), and the coil spring (60) in this order, and a tip of the shaft (84) is a cover-side projection. (56) hole (5
The mobile phone according to claim 1, wherein the mobile phone is slidably inserted in a turning direction in the innermost small-diameter portion of (8). 3. The shaft (84) has a shape in which a part of a cylinder is cut off in parallel with the center line thereof, and the ring (6)
The through hole (70) through which the shaft (84) of (2) penetrates has a shape corresponding to the cross-sectional shape of the shaft (84), and thereby the ring (62) corresponds to the main body side projection (54). The mobile phone according to claim 2, wherein rotation is restricted. 4. The hole (58) is provided with the pair of cover-side projections (5).
The cam (64), the ring (62), and the coil spring (60) are formed in both of the pair of holes, and each of the cams (64), the ring (62) and the coil spring (60) is provided in a pair. Mobile phone. 5. The ring (62) has two convex portions (68) at symmetrical positions, and the cam wavefront of the cam (64) is rotationally symmetric about the center of rotation of the cover (4). The mobile phone according to claim 1, wherein the mobile phone has a shape. 6. The stable position in which the cover (4) is inclined at approximately 130 ° with respect to the main body (2), and the predetermined angle is approximately 40 °.
A mobile phone according to claim 1. 7. The cover (4) in the stable position and the transmission section so that the cover (4) functions sufficiently as a reflection sound collecting plate for the transmission section (18) in the stable position. The mobile phone according to claim 1, wherein the relative positional relationship of (18) is set.