JP2760923B2 - 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, it is assumed that the above-mentioned handset in a cordless telephone including a telephone body connected to a subscriber line by wire and a handset wirelessly connected to the telephone body is included in a mobile phone.

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 receiver, a microphone serving as a transmitter, 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 first structure of a portable telephone according to the present invention comprises a main body provided with a speaker, a microphone, and a switch means, and having a main body-side projection formed at an end on the microphone side; A cover having a pair of cover-side protrusions arranged so as to sandwich the body-side protrusion, and rotating the cover-side protrusion to the body-side protrusion so that the cover covers the switch means when the cover is closed. Cover holding means for pivotally supporting as much as possible.

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 main body-side projection, has an annular cam having a cam wave surface on a circle concentric with the rotation trajectory of the cover, and has a convex portion at a position facing the cam wave surface, A ring provided in the hole of the cover-side protrusion so that the convex portion slides on the cam wavefront with the rotation operation of the cover, and a ring provided in the hole of the cover-side protrusion, and the ring is provided on the cam. And a coil spring biased toward the coil spring.

[0010] The wavefront shape of the cam and the position of the convex portion on the ring are determined by the following: the cover is urged toward a stable position when the cover is opened at a predetermined angle with respect to the main body; Is set so that the cover is urged in the closing direction when the cover is closed at a predetermined angle.

In a second configuration of the portable telephone according to the present invention, a speaker, a microphone, and a switch are provided, and a main body having a main body-side projection formed at an end on the microphone side and the main body-side projection interposed therebetween. A cover having a pair of cover-side projections disposed on the cover, and a cover holding rotatably supporting the cover-side projections on the body-side projections so that the cover covers the switch means when the cover is closed. Means.

A hole is formed in the cover side projection on the side of the main body side projection. The cover holding means has an outer diameter slightly smaller than the inner diameter of the hole of the cover side projection, is formed integrally with the main body side projection, and is slidable in the rotation direction in the hole of the cover side projection. An annular projection to be fitted;
A tongue-shaped protrusion of a predetermined shape integrally formed on at least one of the pair of cover-side protrusions and projecting into the hole; a parallel leaf spring fixed to the main-body-side protrusion and holding the tongue-like protrusion from its tip end side; And

[0013] The shape of the tongue-shaped projection is such that when the cover is opened at a predetermined angle with respect to the main body, the cover is urged toward a stable position so that the cover is at a predetermined angle with respect to the main body. The cover is set to be urged in the closing direction when closed.

[0014]

According to the first configuration 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. S / N characteristics can be obtained even when the receiver is brought closer to the receiver to some extent. In addition, a coil spring is used to bias the ring toward the cam, and the coil spring and the ring are housed in a hole of the cover-side projection. In a specific embodiment of the present invention, the cam is also held in the hole. Since it is accommodated, this first configuration is suitable for thinning.

According to the second configuration of the present invention, the cover is rotatably supported by the annular projection on the main body side which is slidably fitted into the hole of the projection on the cover side, and is formed integrally with the projection on the cover side. Since the tongue-shaped protrusion having a specific shape is sandwiched from the tip side of the tongue-shaped protrusion by the parallel leaf spring in the hole of the cover-side protrusion, the cover can function as a reflection sound collecting plate, and the thickness can be reduced. Will be possible.

[0016]

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 internal antenna, 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, 38
Denotes microphones, respectively.

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 according to the first embodiment of the present invention as viewed from the back side of the upper case. A body-side projection 54 is formed at the end of the upper case 2A on the side of the transmitting section of the body. 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 main body side projection 54 side of the cover side projection 56, and a coil spring 60 and a ring 62 are accommodated in this hole 58 in this order.

FIG. 5A is a front view of the ring 62 of FIG.
FIG. 5B is a side view thereof. A pair of convex portions 64 are formed on one surface of the ring 62 at symmetrical positions. Also, three concave portions 66 are provided on the outer peripheral edge of the ring 62.
Are formed.

FIG. 6A is a side view of the cam 68 with a shaft, and FIG. 6B is a front view thereof. Cam with shaft 6
8 integrally includes a shaft 70 penetrating the ring 62 and the coil spring 60, and a cam 72 having a cam wave surface on which the convex portion 64 of the ring 62 slides. A base 74 for fixing the cam 68 with the shaft to the upper case 2A is provided integrally.

Referring to FIG. 4 again, how to attach the cover 4 to the upper case 2A will be described. First, the cover side protrusion 5
6, the coil spring 60 and the ring 62 are accommodated in this order, and in this state, the shaft 70 is passed through the ring 62 and the coil spring 60, and the tip of the shaft 70 is
8 is slidably inserted into the innermost small diameter portion.

A rib 76 projects into the hole 58 of the cover-side projection 56 at a position corresponding to the concave portion 66 of the ring 62. The ring 62 is formed by engaging the concave portion 66 with the rib 76. The rotation in the inside is regulated.

The cam 68 with a shaft is formed by fitting a U-shaped spacer 82 into a groove 78 formed on the side surface of the base 74 and a groove 80 formed on the main body side projection 54 of the upper case 2A. Fixed to case 2A.

According to this configuration, the cover 4 can be rotatably supported by the upper case 2A. Also, cover 4
The ring 62 rotates together with the cover 4 with the rotation of
On the other hand, the cam 72 is fixed to the upper case 2A, and the urging force of the coil spring 60 acts in the direction of pressing the convex portion 64 of the ring 62 against the cam wave surface of the cam 72. Can be transmitted to the cover 4 according to the rotational position of the cover 4.

FIG. 7 is a developed view of the cam wavefront of the cam 72. The angle shown in the horizontal direction in FIG. 7 corresponds to the cam 7 in FIG.
2 corresponds to the angle shown in the circumferential direction. Cam 72
Is most concave at 0 ° (360 °) and 180 °,
Most prominent at 90 ° and 270 °. The cam wave front has a rotationally symmetric shape about the center of the shaft 70.

In FIG. 7, the range indicated by reference numeral 84 (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. 8 (A) and 8 (B) are views showing a state where the cover is closed when viewed from a direction perpendicular to and parallel to the shaft, respectively. FIG. 8 (A) is a view showing FIG. 8 (B). 8B corresponds to a cross-sectional position taken along the line BB in FIG.
Corresponds to the cross-sectional position of the line AA.

The hole 58 of the cover-side projection 56 is formed by a small-diameter portion 58A, a medium-diameter portion 58B, and a large-diameter portion 58 in order from the side of the cover.
C, and the tip of the shaft 70 is a small diameter portion 58A.
Is slidably inserted in the rotating direction. The cam 72 is inserted into the large diameter portion 58C so as to be slidable in the rotation direction.

One end of the coil spring 60 contacts a step between the small diameter portion 58A and the middle diameter portion 58B, and the other end of the coil spring 60 contacts the ring 62. Thereby, the ring 62
Of the cam 72 is constantly pressed against the cam wave surface of the cam 72 by the urging force of the coil spring 60.

[0033] In the state where the cover is closed as shown in FIG. 8, one of the two protrusions 64 of the ring 62, as indicated at P ₁ in FIG. 7, with respect to the cam wavefront 5
It is located at 0 °. In this case, the other convex portion 64 of the ring 62, as indicated at P ₃ is in the position of 230 °,
The cover 4 is a ring 62 that rotates together with the cover 4.
The urging force is received via the two convex portions 64 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. 9A and 9B are views showing a state in which the cover is in the stable position, corresponding to FIGS. 8A and 8B. The stable position of the cover 4 is as follows.
This is a position inclined approximately 130 ° with respect to.

When the cover 4 is in the stable position, the ring 6
One of the two of the two protrusions 64 at the position of 180 ° relative to the cam plane as indicated at P ₂ in FIG. Ring 62
Of the convex portion 64 is 0 ° (360 °) with respect to the cam wavefront.
°).

FIGS. 10A and 10B are views showing a state in which the cover is fully opened, corresponding to FIGS. 8A and 8B. It is a cover 4 into opened maximally, in a position of 230 ° relative to the cam plane as one is indicated at P ₃ in FIG. 7 of the two protrusions 64 of the ring 62, the ring 62 the the other protrusion 64 at the position of 50 ° shown by P _1.

In this case, if the cover 4 is opened to the maximum extent 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 convex portions of the ring is in the range of 50 ° to 90 ° with respect to the cam wave front (the angle between the cover and the main body is 0 °).
° to 40 °), the cover receives a biasing force in the closing direction, and one of the convex portions of the ring is 90 ° with respect to the cam wave front.
When the angle is in the range of from 230 ° to 230 ° (when the angle between the cover and the main body is from 40 ° to 180 °), the cover receives the biasing force in the direction in which the cover is located at the stable position.

In this embodiment, the stable position of the cover is set such that the angle between the cover and the main body is 130 ° when the cover is made to function as a reflection sound collecting plate in this state. This is because the highest S / N ratio can be obtained.

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 64 of the ring 62 are formed at symmetrical positions with respect to each other.
Since the cam wave front is rotationally symmetric about the center of rotation of the cover, the urging force of the coil spring 60 can be effectively transmitted to the cover 4, and the ring 62 is inclined with respect to the shaft 70. There is no danger that the frictional force between them will increase.

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

FIG. 11 is an exploded perspective view of the upper case and the cover viewed from the back side of the upper case in the second embodiment of the present invention. A body-side projection 54 is formed at the end of the upper case 2A on the side of the transmitting section of the body. The cover 4 includes a main body side projection 5
4 has a pair of cover-side protrusions 56 arranged so as to sandwich them. A hole 85 is formed on the side of the main body side projection 54 of the cover side projection 56, and a coil spring 6 is formed in the hole 85.
0 and the ring 86 are accommodated in this order.

In the first embodiment, the shaft is formed integrally with the cam, that is, the shaft is formed in the upper case 2A of the main body.
In the present embodiment, the shaft 100 is separate from the cam 92.
00 is fixed to the innermost part of the hole 85 in the cover-side projection 56 so as to penetrate the ring 86 and the coil spring 60. The shaft 100 has a shape obtained by cutting off a part of a cylindrical shape in parallel with its center line.

FIG. 12A is a front view of the ring 86 of FIG. 11, and FIG. 12B is a side view thereof. A pair of convex portions 88 are formed on one surface of the ring 86 at positions symmetrical to each other. The ring 86 has a through hole 90 through which the shaft 100 passes.
Corresponds to the cross-sectional shape of the shaft 100.
With this shape, when the shaft 100 is passed through the ring 86, the ring 86 can move in the longitudinal direction of the shaft 100 without rotating with respect to the shaft 100.

On the inner periphery of the ring 86, three small projections 92 projecting into the through hole 90 are formed. By forming three or more such small projections 92, the movement of the ring 86 in the longitudinal direction of the shaft 100 becomes smooth.

FIG. 13A is a side view of the cam 92 of FIG. 11, and FIG. 13B is a front view thereof. The cam 92 has a cam wave front on which the convex portion 88 of the ring 86 slides,
A base 94 for fixing the cam 92 to the upper case 2A is integrally provided on the side of the cam 92 opposite to the wave surface. The cam 92 is formed with a hole 98 for slidably supporting the shaft 100 so as not to penetrate to the base 94.

Referring to FIG. 11, upper case 2 of cover 4
How to attach to A will be described. First, the cover side protrusion 56
In this state, the coil spring 60 and the ring 86 are accommodated in this order, and the shaft 100 is passed through the ring 86 and the coil spring 60 in this state.
5 is inserted into the small diameter part at the innermost part. The small-diameter portion has a shape in which one end of the shaft 100 is fitted, whereby the rotation of the shaft 100 with respect to the cover-side protrusion 56 is restricted.

The other end of the shaft 100 is slidably inserted into the center hole 98 of the cam 92 in the rotation direction.
The U-shaped spacer 82 is fitted into the groove 96 formed on the side surface of the base 94 and the groove 80 formed on the main body-side projection 54 of the upper case 2A, thereby being fixed to the upper case 2A.

According to this configuration, the cover 4 can be pivotally supported on the upper case 2A. Also, cover 4
The shaft 100 and the ring 86 rotate together with the cover-side projection 56 with the rotation of the cam 86. On the other hand, the cam 92 is fixed to the upper case 2A, and the urging force of the coil spring 60 causes the protrusion 88 of the ring 86 to move. Acting in the direction of pressing against the cam wavefront of the cam 92, the urging force of the coil spring 60 can be transmitted to the cover 4 according to the rotational position of the cover 4.

The cam wavefront of the cam 92 may be the same as the cam wavefront of the cam 72 in the first embodiment described with reference to FIG. The following describes what biasing force the cover 4 receives in accordance with its rotational position.

FIGS. 14 (A) and 14 (B) show the closed state of the cover as viewed from a direction perpendicular to and parallel to the shaft, respectively. FIG. 14 (A) is a view showing FIG. 14 (B). 14B corresponds to the cross-sectional position along the line BB, and FIG. 14B corresponds to the cross-sectional position along the line AA in FIG.

When the cover 4 is in a closed state, one of the two convex portions 88 of the ring 86 is indicated by a symbol P _{1 in} FIG.
As shown by, it is at a position of 50 ° with respect to the cam wavefront.
The other of the projections 88 of the ring 86, as indicated at P ₃ at the position of 230 °. Therefore, the cover 4 is connected to the cover 4 via the two convex portions 88 of the ring 86 that rotates together with the shaft 100 fixed to the cover-side protrusion 56.
Are receiving a biasing force from the coil spring 60 in the closing direction. For this reason, the cover 4 does not easily open due to an external impact or the like.

FIGS. 15A and 15B are views showing a state where the cover is in the stable position, corresponding to FIGS. 14A and 14B. The stable position of the cover 4 is a position where the cover 4 is inclined by approximately 130 ° with respect to the upper case 2A.

When the cover 4 is in the stable position, the ring 8
6 one of the two protrusions 88 of the in the position of 180 ° relative to the cam plane as indicated at P ₂ in FIG. Ring 86
Of the cam wavefront is 0 ° (360 °).
°).

FIGS. 16A and 16B are views showing a state in which the cover is fully opened, corresponding to FIGS. 14A and 14B. In the state where the cover 4 is fully opened, one of the two convex portions 88 of the ring 86 is indicated by a symbol P _{3 in} FIG.
At 230 ° to the cam wavefront as shown by
Ring the other protrusion 88 of the 86 are in the position of 50 ° shown by P _1.

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

The above results are summarized as follows.
That is, when one of the protrusions 88 of the ring 86 is at a position of 50 ° to 90 ° with respect to the cam wavefront of the cam 92 (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
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.

According to the first or second embodiment, since the urging force is applied to the cover by using the ring, cam and coil spring housed in the cover-side projection, it is significantly larger than that of the prior art. It is possible to reduce the thickness of a simple device.

FIG. 17 is an exploded perspective view of the upper case and the cover viewed from the back side of the upper case in the third embodiment of the present invention. A body-side projection 102 is formed at the end of the upper case 2A of the body on the side of the transmitting section. The cover 4 includes a pair of cover-side protrusions 10 arranged so as to sandwich the body-side protrusion 102.
Four.

A hole 106 is formed on the side of the main body side projection 102 of the cover side projection 104. Cover side projection 104
Has an integral tongue-shaped projection 108 projecting into the hole 106. The shape of the tongue-shaped projection 108 will be described later.

On the cover side projection 104 side of the main body side projection 102, there is formed an annular projection 110 having a plurality of notches at equal intervals in the circumferential direction. The outer diameter of the annular projection 110 is the cover side projection. It is slightly smaller than the inside diameter of the end of the hole 106 in 104. The annular projection 110 does not have to be formed with a missing portion.

A parallel leaf spring 112 for sandwiching the tongue-shaped projection 108 from the tip end thereof has a hole 114 formed in the main-body-side projection 102 from the inside to the outside of the main-body-side projection 102.
Is fixed to the main body side projection 102 by a screw 116 in a form penetrating through.

FIG. 18 is a front view of the tongue 108 of FIG. The tongue-shaped projection 108 has a substantially elliptical cross-section, and the outer peripheral surface of the tongue-shaped projection 108 except for the end face is composed of parallel planes 108A parallel to each other and a curved surface 108B having a predetermined curvature distribution.

In FIG. 17, cover 4 is attached to upper case 2A.
In the case of mounting on the main body side projection, the annular projection 110 of the main body side projection 102 is slidably fitted into the hole 106 of the cover side projection 104. It is preferable to apply a lubricant to the fitting portion. If a plurality of notches are formed in the annular projection 110 as in this embodiment, the notches serve as oil reservoirs for the lubricant, so that smooth rotation of the cover 4 is ensured.

By forming the top of the annular projection 110 into a convex curved surface, the annular projection 110 is
4 is easily fitted into the hole 106. When the cover 4 is rotatably supported by the upper case 2A, the parallel leaf spring 112 is fixed to the main body side projection 102 with a screw 116, and the tongue-like projection 108 is held by the parallel leaf spring 112 from the tip end side. So that

FIGS. 19 (A) and 19 (B) are views showing a state in which the cover is closed when viewed from a direction perpendicular to and parallel to the tongue-shaped projection, respectively. FIG. 19) corresponds to the cross-sectional position taken along the line BB in FIG.
9 (A) corresponds to the cross-sectional position along the line AA.

When the cover 4 is closed, the parallel leaf spring 112 is in contact with the curved surface of the tongue-shaped projection 108, and the parallel leaf spring 112 is in a relatively wide open state. In this state, the elastic force of the parallel leaf spring 112 to close acts on the cover 4 via the tongue-shaped protrusion 108 in the closing direction.

FIGS. 20A and 20B are views showing the state where the cover is in the stable position, corresponding to FIGS. 19A and 19B. The stable position of the cover 4 is a position where the cover 4 is inclined by approximately 130 ° with respect to the upper case 2A.

When the cover 4 is in the stable position, the parallel leaf spring 112 is in contact with the parallel plane of the tongue-shaped projection 108,
At this time, the parallel leaf spring 112 is hardly opened. In this state, since the cover 4 does not receive a force in the rotating direction, the cover 4 is stable in this state.

FIGS. 21A and 21B are views showing a state in which the cover is fully opened, corresponding to FIGS. 19A and 19B. When the cover 4 is fully opened, the parallel leaf spring 112 abuts against the curved surface of the tongue-shaped projection 108, and the parallel leaf spring 112 is relatively wide open. Elasticity of the tongue 10
8 acts in the direction of closing the cover 4.

Therefore, if no force is applied to the cover 4 to maintain the cover 4 in the fully opened state, the cover 4 is displaced to a stable position as shown in FIG. 20 and is stabilized there.

The shape of the tongue-shaped projection 108, particularly the curvature distribution of the curved surface thereof, is designed as follows. That is, when the angle between the cover 4 and the main body is 0 ° to 40 °, the urging force is applied in the closing direction of the cover 4 and the angle between the cover 4 and the main body is 40 °.
The shape of the tongue-shaped projection 108 is set so that the cover 4 receives a biasing force in the direction in which the cover 4 is located at the stable position when the angle is 180 °.

In the third embodiment, the tongue-shaped protrusion 108 and the parallel leaf spring 112 may be formed on only one of the two cover-side protrusions 104, or may be provided on both of them. When both are provided, the biasing force can be doubled.

Further, according to the third embodiment, the tongue-shaped projection located in the hole of the cover-side projection is held by the parallel leaf spring from the tip side, so that the size of the apparatus can be reduced.

[0076]

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 according to the first embodiment of the present invention.

FIG. 5 is a front view and a side view of the ring in the first embodiment.

FIG. 6 is a side view and a front view of the cam with shaft in the first embodiment.

FIG. 7 is a developed view of a cam wave front in the first and second embodiments.

FIG. 8 is a view showing a state where a cover is closed in the first embodiment.

FIG. 9 is a diagram showing a state in which the cover is in a stable position in the first embodiment.

FIG. 10 is a diagram showing a state in which the cover is fully opened in the first embodiment.

FIG. 11 is an exploded perspective view of an upper case and a cover in the second embodiment.

FIG. 12 is a front view and a side view of a ring in a second embodiment.

FIG. 13 is a side view and a front view of a cam according to a second embodiment.

FIG. 14 is a view showing a state where a cover is closed in the second embodiment.

FIG. 15 is a diagram showing a state in which the cover is at a stable position in the second embodiment.

FIG. 16 is a view showing a state where a cover is opened to the maximum in the second embodiment.

FIG. 17 is an exploded perspective view of an upper case and a cover in the third embodiment.

FIG. 18 is a front view of a tongue-shaped protrusion in the third embodiment.

FIG. 19 is a view showing a state where a cover is closed in the third embodiment.

FIG. 20 is a diagram showing a state where the cover is in a stable position in the third embodiment.

FIG. 21 is a diagram showing a state where a cover is opened to the maximum in a third embodiment.

[Explanation of symbols]

 2 Main body 2A Main body upper case 2B Main body lower case 4 Cover 54, 102 Body side protrusion 56, 104 Cover side protrusion 62, 86 Ring 70, 100 Shaft 72, 92 Cam 108 Tongue protrusion 112 Parallel leaf spring

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-135959 (JP, A) JP-A-5-263563 (JP, A) JP-A-5-68156 (JP, U) JP-A 5-68156 (JP, U) 86349 (JP, U) Special Table Hei 6-508408 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04B 7/24-7/26 H04M 1/02-1/23 H04Q 7/00-7/38

Claims (14)

(57) [Claims] 1. A main body (2) having a speaker, a microphone, and a switch means, and a main body-side projection (54) formed at an end on the microphone side, so as to sandwich the main body-side projection (54). A cover (4) having a pair of cover-side protrusions (56) disposed thereon, and the cover-side protrusions (56) so that the cover (4) covers the switch means when the cover (4) is closed. A cover holding means rotatably supporting the main body side projection (54), and at least one of the pair of cover side projections (56) has a hole (58) on the side of the main body side projection (54). , 85), and the cover holding means is fixed to the main body side projection (54), and has an annular cam (72) having a cam wave front on a concentric circumference with the rotation trajectory of the cover (4). ,
92), and a convex portion (64, 88) at a position facing the cam wave front, and the cover is formed so that the convex portion slides on the cam wave surface with the turning operation of the cover (4). A ring (62, 86) provided in the hole (58, 85) of the side projection (56), and a ring (62, 86) provided in the hole (58, 85) of the cover-side projection (56). ) Toward the cam (72, 92), and the wavefront shape of the cam (72, 92) and the convex portion (64, 88) of the ring (62, 86). The position is set when the cover (4) is opened more than a predetermined angle with respect to the main body (2).
(4) is biased toward the stable position and the cover (4) is biased in the closing direction when the cover (4) closes at a predetermined angle with respect to the main body (2). A mobile phone characterized by being performed. 2. The holes (58, 85) are formed in both the pair of cover-side projections (56), and the cams (72, 92) and the ring (62) correspond to the pair of holes. , 86) and said coil spring (60) are provided in pairs, respectively. 3. The projections (64, 88) of the ring (62, 86) are located at two positions symmetrical to each other, and the cam wavefront of the cam (72, 92) is located at the center of rotation of the cover (4). 2. The mobile phone according to claim 1, wherein the mobile phone has a rotationally symmetric shape with respect to the center. 4. The hole (58) of the cover-side projection (56) has a small diameter part (58A), a medium diameter part (58B) and a large diameter part (58C) in order from the side part of the cover (4). The cam (72) includes the ring (62) and the coil spring (6).
(0) is provided integrally, and the shaft (70) and the cam (72) are pivotally connected to the small-diameter portion (58A) and the large-diameter portion (58C), respectively. The coil spring (60) is slidably inserted, and both ends of the coil spring (60) are in contact with a step between the small diameter portion (58A) and the middle diameter portion (58B) and the ring (62), respectively. The mobile phone according to claim 1. 5. The ring (62) has a concave portion (66) formed on the outer periphery of the ring (62) formed from the cover-side projection (56) by the large-diameter portion (58).
The rotation of the cover-side projection (56) in the large-diameter portion (58C) is restricted by engaging a rib (76) protruding into the inside (C). A mobile phone according to claim 1. 6. A shaft (100) that rotates together with the cover-side projection (56) passes through the ring (86) and the coil spring (60) in a hole (85) of the cover-side projection (56). The end of the shaft (100) is connected to the cam (9).
2. The mobile phone according to claim 1, wherein the mobile phone is inserted into the center hole (98) slidably in the rotating direction. 7. The shaft (100) has a shape obtained by cutting off a part of a cylinder parallel to the center line thereof, and
The through hole (90) through which the shaft (100) of (86) penetrates has a shape corresponding to the cross-sectional shape of the shaft (100), whereby the cover-side projection (56) of the ring (86) is formed. The mobile phone according to claim 6, wherein rotation of the mobile phone is restricted. 8. The mobile phone according to claim 7, wherein the ring has at least three small projections projecting into the through hole. 9. The shaft (70,10) of the cam (72,92).
A plate-shaped base (74,94) is integrally formed on the side opposite to (0), and a groove (78,94) formed on the side surface of the base (74,94).
The U-shaped spacer (82) is fitted into a groove (80) formed at a position corresponding to the groove (78, 96) of the base of the main body side projection (54). The mobile phone according to claim 4 or 6, wherein a cam (72, 92) is fixed to the main body side projection (54). 10. A main body (2) provided with a speaker, a microphone, and a switch means, and a main body-side projection (102) formed at an end on the microphone side, so as to sandwich the main body-side projection (102). A cover (4) having a pair of cover-side projections (104) disposed thereon, and the cover-side projections (104) so that the cover (4) covers the switch means when the cover (4) is closed. A cover holding means for rotatably supporting the main body side projection (102) .The cover side projection (104) is formed with a hole (106) on the side of the main body side projection (102). The cover holding means has an outer diameter slightly smaller than the inner diameter of the hole (106) of the cover side projection (104), is formed integrally with the main body side projection (102), and is formed integrally with the cover side projection (104). An annular projection (110) that slidably fits in the hole (106) in the rotation direction and a small number of the pair of cover-side projections (104). And is formed integrally in one, tongue of a predetermined shape protruding in the bore (106) in (108), fixed to the body-side projection (102), said tongue (108)
The tongue-shaped projection (108) has a shape when the cover (4) is opened at a predetermined angle with respect to the main body (2). The above cover
(4) is biased toward the stable position and the cover (4) is biased in the closing direction when the cover (4) is closed at a predetermined angle with respect to the main body (2). A mobile phone characterized by being performed. 11. The portable telephone according to claim 10, wherein said tongue-like projections (108) are formed on both said pair of cover-side projections (104). 12. The annular projection (110) has a top formed with a convex curved surface, and the annular projection has a plurality of notches formed at equal intervals on the circumference. The mobile phone according to claim 10. 13. The stable position wherein the cover (4) is inclined at approximately 130 ° with respect to the main body (2), and the predetermined angle is approximately 40 °. The mobile phone according to claim 10. 14. The relative positional relationship between the cover (4) in the stable position and the microphone so that the cover (4) functions sufficiently as a reflection sound collecting plate for the microphone in the stable position. The mobile phone according to claim 1, wherein the mobile phone is set.