JPH10311327A - Hinge mechanism and hinge unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease a number of part items constituting a hinge, wherein when it is assembled in a portable telephone, a call can be performed with the telephone standing on a table. SOLUTION: In a shaft, first/second cam bodies 38, 28 are inserted capable of rotating. A compression coil spring 36 energizes the second cam body 28 toward the first cam body 38. In a butt surface of the first/second cam bodies 38, 28, cam surfaces 32, 82 are formed, the second cam body 28, while sliding on the shaft, is brought into contact and separated in accordance with an opening angle of a cover 20, and opening force is given to the cover 20 through the first cam unit 38. Here, when the cover 20 is opened θ=88 deg.C, a top part 32A is engaged with a groove part 84, and the cover 20 is stopped. In this way, the cover 20 is placed in a lower position, and a portable telephone can be made to stand on an upper part or the like of a table.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge mechanism and a hinge unit for supporting a main body so that a lid can be opened and closed.

[0002]

2. Description of the Related Art Like a lid of a portable telephone and a lid of an AV device,
To realize the opening and closing mode according to the characteristics of the equipment used,
Various hinge mechanisms have been proposed.

A mobile phone 52 shown in FIG. 10 will be described as an example in which the hinge mechanism is used. This mobile phone 52
The lid 54 (provided with a microphone 56 and having a function of covering the dial button 58) is supported by a hinge member as shown in FIGS. 204797).

The hinge member includes a cylindrical case 64 fixed to a main body 60 with a screw 62.
On the inner peripheral wall of 4, a convex portion 66 constituting a cam mechanism is protruded. The case 64 has a concave portion 6 that engages with the convex portion 66.
A cylindrical slider 70 formed with 8 is rotatably inserted.

The slider 70 is connected to a cover 5 via a rotary shaft 74 fixed to a shaft of the cover 54 with a nut 72.
4 rotates according to the opening angle of the
Is biased toward the convex portion 66 by a compression coil spring 78 whose one end is supported by a flange 76 provided at the bottom.

When the lid 54 is opened by such a configuration, the lid 54 is naturally opened by the urging force of the compression coil spring 78 until the convex portion 66 and the concave portion 68 are engaged, and at a predetermined opening angle (normally 150 °). The lid 54 stops. Also, the lid 54
Is returned to the closing direction, it is closed naturally until the projection 66 and the recess 68 are engaged, and the dial button 58 is covered.

However, the conventional hinge member is a case 6
4, a slider 70, a rotating shaft 74, a compression coil spring 78, and a nut 72 for mounting;
There are many parts. Further, in the conventional structure, since only the hinge member cannot be temporarily assembled in advance, it is necessary to attach the hinge member to the main body 60 and the lid 54 of the mobile phone 52 when performing a load test or a durability test.

Further, since the stop angle of the lid 54 is set to 150 °, it is not possible to use the portable telephone 52 standing on a desk and making a freehand conversation.

[0009]

In consideration of the above facts, the present invention has a small number of parts, can be temporarily assembled before being assembled to the main body, and can be set up on a desk when assembled to a mobile phone. The task is to be able to make calls.

[0010]

According to the first aspect of the present invention, the lid is supported on the main body so as to be openable and closable, and the first cam body is fixed to the shaft of the lid. In addition, in the body,
A storage portion is formed facing the shaft portion, and the second cam body is stored in the storage portion so as to be non-rotatable and slidable. An urging means is accommodated in the storage portion, and urges the second cam body toward the first cam body.

Further, a cam surface is formed on the abutting surface of the first cam body and the second cam body, and the abutting form is changed from an abutting state to a partially abutting state according to the opening angle of the lid. Change.

For example, when the lid is opened in the opening direction from the closed state, the first cam body rotates together with the lid, the second cam body is pushed into the main body by the cam function, and the contact form of the cam surface is one. It reaches the part contact state. When the lid is further opened from this stage, the second cam body moves toward the first cam body by the urging force of the urging means. This moving force is converted by the cam surface into a force for rotating the first cam body.

For this reason, the lid naturally opens together with the first cam body, and stops when the cam surface comes into an interview state.

As described above, according to the present invention, the cam surfaces are formed on the abutting surfaces of the first cam body and the second cam body, respectively.
In addition, since the first cam body is mounted on the lid and the second cam body is directly mounted on the main body, the mounting space is reduced, and
The number of parts is reduced.

A groove is formed on one of the cam surfaces, and when the lid is at an opening angle of about 90 ° with respect to the main body, the top constituting the other cam surface engages with the groove. For this reason, when this hinge mechanism is applied to a mobile phone, the lid stops at an angle of about 90 °, so that it is possible to talk with the mobile phone standing on a desk with the lid down.

According to the second aspect of the present invention, the first cam body and the second cam body are rotatably inserted into the shaft. Stoppers are provided at both ends of this shaft,
The first cam body is prevented from coming off, and one end of the compression coil spring inserted into the shaft is supported to urge the second cam body toward the first cam body.

Further, a cam surface is formed on the abutting surface of the first cam body and the second cam body, and the shaft is formed in accordance with a change in the relative rotation angle between the first cam body and the second cam body. The contact form is changed from the contact state to the partial contact state while sliding upward.

As described above, by providing a stopper on the shaft, and forming a hinge unit in which the first cam body, the second cam body, and the compression coil spring are temporarily assembled,
Assembling to the main body and the lid becomes easy, and a load test and a durability test can be performed as a hinge unit without assembling to the main body and the lid.

When this hinge unit is applied to a mobile phone, the lid can be stopped at an angle of about 90 °, so that the mobile phone can be set up on a desk for talking.

[0020]

1 to 3 show a portable telephone 12 using a hinge unit 10 according to the present embodiment.

At the end of the main body 14 of the mobile phone 12,
A substantially prismatic support 16 is provided. This support 1
6 and the dial portion 18 are cut down, and when the cover 20 is closed, the outer surface of the main body 14 and the cover 20 are designed to be flush.

A bifurcated, substantially cylindrical shaft 22 protruding from the lid 20 so as to sandwich both ends of the support 16 is rotatably supported by the support 16. The support 16 includes
A cylindrical storage portion 24 having an open surface facing the shaft 22 is formed. A guide groove 26 is formed on the inner peripheral wall of the storage portion 24 along the axial direction. This guide groove 26
A guide projection 30 protruding from the outer peripheral surface of the second cam body 28 constituting the hinge unit 10 is slidably inserted into the hinge unit 10.

As a result, the second cam body 28 is slidably held in the storage portion 24 and is not rotatable with respect to the support 16.

As shown in FIGS. 4 and 5, the second cam body 28 is a cylindrical body having a cam surface 82 formed at an end.
It is rotatably inserted into the shaft 34. Further, a cylindrical first cam body 38 having a cam surface 32 formed at the end is also inserted through the shaft 34. First cam body 3
A projection 80 protrudes from the outer peripheral surface of the projection 8.

As shown in FIGS. 5 and 9C, the cam surfaces 32 and 82 are provided when the opening angle of the lid 20 is θ = 150 °, that is, when the guide projection 3
At a position where the 0 and the projection 80 are rotated relative to each other by 90 °, an abutting state is established, and the lid 20 is stopped. A groove 84 is formed at the top 82A of the cam surface 82.
As shown in FIG. 8C, the top 32A of the cam surface 32 is engageable.

On the other hand, a flange portion 40 is formed at one end of the shaft 34 to prevent the first cam body 38 from coming off. At the other end of the shaft 34, an annular groove 42 is formed, and an E-ring 44 is fitted therein. A compression coil spring 36 is mounted between the E-ring 44 and the second cam body 28 to urge the second cam body 28 toward the first cam body 38, so that the cam surface 32 is free.
And the cam surface 82 are in an interview state.

As shown in FIG. 3, the shaft 22 has
Cylindrical fixing portion 46 whose surface facing support 16 is open
Are formed. A key groove 48 is formed on the inner peripheral wall of the fixing portion 46 along the axial direction. A projection 80 of the first cam body 38 is engaged with the key groove 48, and the first cam body 38 rotates around the shaft 34 integrally with the lid 20.

Next, the operation of the hinge unit 10 according to this embodiment will be described. As shown in FIG. 6, when the lid 20 is closed, the top 32A of the cam surface 32 of the first cam body 38
And the valley portion 82B of the cam surface 82 of the second cam body 28 do not mesh with each other, and the cam surface 32 and the cam surface 82 are not in an abutting state. That is, the first cam body 38 is pushed by the second cam body 28 urged by the compression coil spring 36 to rotate about the shaft 34 in the direction of arrow F, and presses the lid 20 against the main body 14. doing. For this reason, the lid 2
0 can cover the main body 14 without rattling, and does not open even if the lid 20 is inverted.

Next, as shown in FIG. 7, when the lid 20 is opened in the direction of arrow M against the urging force of the compression coil spring 36, the second cam body 28 is turned by the cam function. 38, and is pushed back to the back of the storage section 24. Then, the top 8 of the cam surface 82 of the first cam body 38
2A and the top 32A of the cam surface 32 of the second cam body 28 are opened to a position where they abut.
Is set to θ = 60 °), and
When the lid 20 is slightly opened in the direction of arrow M, the top 32A of the cam surface 32 slides, and the lid 20 naturally opens in the M direction. That is, the compression coil spring 36
The moving force in the axial direction of the second cam body 28 pressed by the urging force is converted into the rotational force of the first cam body 38.

Then, as shown in FIG. 8, the top portion 32A of the cam surface 32 engages with the groove 84 formed on the cam surface 82 and stops the lid 20. At this time, the opening angle of the lid 20 is set to be θ = 88 °, and as shown in FIG. 2, the main body 14 of the mobile phone 12 can be set up with the lid 20 on a desk or the like. For this reason, the mobile phone 12
You can talk without having to hold your phone.

Next, the lid 20 is opened in the direction of arrow M until the top 32A of the cam surface 32 is separated from the groove 84 from the state shown in FIG.
The moving force in the axial direction of the second cam body 28 pressed by the urging force of No. 6 is converted into the rotational force of the first cam body 38. Then, as shown in FIG. 9, the cam surface 32 and the cam surface 82 are in contact with each other, and specifically, the top portion 32A of the cam surface 32
Is a valley portion 82B of the cam surface 82 and a valley portion 32B of the cam surface 32.
Engages with the top 82A of the cam surface 82, and the lid 20 stops (open angle θ = 150 °).

In this open state of the lid 20, even if an excessive force for further opening the lid 20 acts in the direction of the arrow M,
The top 32A of the cam surface 32 is separated from the valley 82B,
Since the cam body 38 rotates, the hinge unit 10 does not break.

As described above, in this embodiment, the first cam body 38
By forming the cam surface 32 and the cam surface 82 on the abutting surface of the hinge unit 10 and the second cam body 28, respectively.
Can be designed compactly. For this reason, the space required for assembly can be reduced. Further, since the first cam body 38 and the second cam body 28 are directly attached to the lid 20 and the main body 14, the number of parts for constituting the hinge mechanism can be reduced.

Furthermore, the temporarily assembled hinge unit 1
By configuring 0, a load test and a durability test can be performed as the hinge unit 10.

In this embodiment, the first cam body 38 is
Although the second cam body 28 is disposed on the main body 14 to 0, it is a matter of course that the reverse may be performed. Further, when a simple hinge mechanism is considered instead of the hinge unit 10 in consideration of the simplicity of assembly, one side of the shaft body 22 is supported by a shaft material, and the other side of the shaft body 22 is provided with a first member. The cam body 38 and the second cam body 28 may be arranged so that the compression coil spring 36 applies an urging force.

[0036]

Since the present invention has the above-described structure, the number of parts is small, and a temporary assembly can be performed before assembling to the main body.
Furthermore, when it is mounted on a mobile phone, you can talk on the desk standing up.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a mobile phone including a hinge unit according to the present embodiment.

FIG. 2 is a perspective view showing a state in which a mobile phone provided with a hinge unit according to the embodiment is erected on a desk.

FIG. 3 is a perspective view of the hinge unit according to the embodiment, in which a mounting portion is partially cut away.

FIG. 4 is an exploded perspective view of the hinge unit according to the embodiment.

FIG. 5 is an overall perspective view of the hinge unit according to the embodiment.

6A is a side view of the hinge unit, FIG. 6B is a side view of the mobile phone with the lid closed, and FIG. 6C is a developed view showing a meshing state of the cam surface.

7A is a side view of a hinge unit, FIG. 7B is a side view of a state where a cover of the mobile phone is partially opened, and FIG. 7C is a developed view showing a meshing state of cam surfaces.

8A is a side view of a hinge unit, FIG. 8B is a side view of a state where a cover of the mobile phone is opened at 88 °, and FIG. 8C is a developed view showing a meshing state of cam surfaces.

9 (A) is a side view of the hinge unit, FIG. 9 (B) is a side view of a state where the cover of the mobile phone is opened by 150 °, and FIG. 9 (C) is a developed view showing an engaged state of the cam surface.

FIG. 10 is a perspective view showing a state in which a cover of a conventional mobile phone is opened.

FIG. 11 is a sectional view showing a conventional hinge structure.

FIG. 12 is an exploded perspective view of a conventional hinge structure.

[Explanation of symbols]

 28 second cam body 30 guide projection (rotation stop) 32 cam surface 32A top 34 shaft 36 compression coil spring (biasing means) 38 first cam body 40 flange (stopper) 44 E-ring (stopper) 51 projection (stop) ) 84 groove

Claims (2)

[Claims] A first cam body fixed to a shaft portion of a lid supported to be openable and closable with respect to the main body; and a non-rotatable and axial direction in a storage portion formed in the main body facing the shaft portion. A hinge mechanism comprising: a second cam body slidably housed in the housing; and urging means housed in the housing section to urge the second cam body toward the first cam body. On the butting surface of the first cam body and the second cam body,
In accordance with the opening angle of the lid, there are formed cam surfaces each taking a contact form from an abutting contact state to a partial abutting state, and one of the cam surfaces is such that the lid is substantially 90 with respect to the main body.
A hinge mechanism characterized in that a groove is formed which engages with the top constituting the other cam surface when the opening angle of ° is reached. 2. A shaft, a first cam body rotatably inserted through the shaft, a second cam body rotatably inserted through the shaft, and the second cam body inserted through the shaft. A compression coil spring biasing toward the first cam body, stoppers provided at both ends of the shaft for preventing the first cam body and the compression coil spring from coming off, the first cam body and the second A cam surface formed on the abutting surface with the cam body, and taking a contact form from a contact state to a partial contact state according to a relative rotation angle of the first cam body and the second cam body; A groove formed on one of the cam surfaces and engaging with a top constituting the other cam surface when the lid has an opening angle of about 90 ° with respect to the main body. Hinge unit.