JPH10246222A - Hinge mechanism and hinge unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge unit in which the number of part items is few and whose attaching space can be reduced. SOLUTION: A first cam body 38 and a second cam body 28 are rotatively inserted in a shaft 34. An E-ring 44 and a flange part are arranged at both ends of the shaft 34, thereby preventing the first cam body 38 and a compression coil spring 36 from being slipped away. The compression coil springs 36 energizes the second cam body 28 toward the first cam body 38. A cam surface 32 is formed on a surface that the first cam body 38 and the second cam body 28 are oppositely placed, and the second cam body 28 is connected to and separated from according to the opening angle of a cover 20 while being slid on the shaft 34, thereby applying opening force to the cover 20. Thus, this hinge unit can be formed which is temporarily assembled by the shaft 34, the first cam body 38, the second cam body 28 and the compression coil spring 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a hinge mechanism and a hinge unit for supporting a lid so that the lid can be opened and closed with respect to a main body.

[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.

As an example in which the hinge mechanism is used, a mobile phone 52 shown in FIG. 9 will be described. The lid 54 of the mobile phone 52 (including the microphone 56 and having a function of covering the dial button 58) is supported by the hinge member as shown in FIGS. See JP-A-8-204797).

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.

With such a configuration, when the lid 54 is opened, the lid 66 is naturally opened by the urging force of the compression coil spring 78 until the projection 66 and the recess 68 are engaged, and the lid 54 stops at a predetermined opening angle. Also, when the lid 54 is returned in the closing direction, the lid 54 naturally closes until the projection 66 and the recess 68 engage,
Covers dial button 58.

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, with the lid 54 closed, the projection 6
6 and the concave portion 68 are engaged with each other, that is, since the urging force of the compression coil spring 78 does not act so much, the lid 54 may be loose.

In addition, since the slider 70 is housed inside the case 64, the size of the case 64 is increased, and there is a limit in reducing the mounting space for the hinge member.

[0010]

SUMMARY OF THE INVENTION In consideration of the above facts, the present invention has the following features.
In addition, the mounting space can be reduced, and in the invention according to the second aspect, further, it is ensured that the cover is not rattled in a closed state. In the invention according to the third aspect,
Further, it is an object of the present invention to provide a provisional assembly before assembling to the main body, and to further facilitate the mounting work in the invention according to the fourth aspect.

[0011]

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 is fixed to the shaft of the lid. The main body is provided with a storage portion facing the shaft portion, and the second cam 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, cam surfaces of the same shape are formed on the butting surfaces of the first cam body and the second cam body, respectively, from the entire contact to the partial contact depending on the opening angle of the lid. Change the contact form.

For example, when the lid is opened in the opening direction from the closed state, the first cam body rotates together with the lid, and the second cam body is pushed into the main body by the function of the cam surface, so that the contact surface of the cam surface Is partially in contact. From this stage, when the lid is further opened, 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 entire cam surface comes into contact.

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 and the second cam body are directly mounted on the lid and the main body, the mounting space is reduced and the number of parts is reduced.

In the open state of the lid, even if an excessive force acts on the lid, the hinge mechanism is broken because the cam surface allows the lid to be opened between full contact and partial contact. There is no.

According to the second aspect of the invention, the first cam body and the second cam body have the same shape. As described above, by using the common parts, the assembling becomes easy and the molding can be performed with the same mold, so that the manufacturing cost can be reduced.

According to the third aspect of the present invention, when the lid is opened and used, the cam surface is brought into full contact with the cam surface. When the lid is closed, the cam surface is brought into full contact with the cam surface. The cam surface is machined so that the lid hits the main body.

For this reason, with the lid closed,
The urging force of the urging means acts in the direction of pushing the second cam body toward the first cam body, that is, in the direction of rotating the first cam body and closing the lid. Therefore, there is no backlash when the lid is closed.

According to the fourth 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 a shaft is formed according to a change in a relative rotation angle between the first cam body and the second cam body. It slides on and separates and changes the contact form from full contact to partial contact.

As described above, the stopper is provided on the shaft, and the first cam body, the second cam body, and the hinge unit in which the compression coil spring is temporarily assembled are configured.
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.

According to the fifth aspect of the present invention, a detent is formed on the outer surface of the first cam body and the second cam body, and a concave portion or a protruding portion is formed on the main body and the lid to engage with the detent. Just complete the assembly.

[0024]

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 so that when the lid 20 is closed, the outer surface of the main body 14 and the lid 20 are flush with each other.

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 by 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 has a cam surface 32 formed at one end of a cylindrical body, and is rotatably inserted into a shaft 34. A first cylindrical cam body 38 is inserted through the shaft 34. The first cam body 38 has the same shape as the second cam body 28, and the cam surface 32 of the first cam body 38 and the second cam body 28 are rotated by 90 ° about the shaft 34.
8 is in contact with the entire surface (FIG. 8C).
reference).

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. An annular groove 42 is formed at the other end of the shaft 34 so that an E-ring 44 is fitted therein. The E-ring 44 and the second cam body 28
A compression coil spring 36 is mounted between the two and biases the second cam body 28 toward the first cam body 38 so that the cam surfaces 32 abut against each other in a free state. ing.

As shown in FIG. 3, the shaft 22 has
A cylindrical fixing portion 46 having an open surface facing the support 16.
Are formed. A key groove 48 is formed on the inner peripheral wall of the fixing portion 46 along the axial direction. A projection 51 projecting from the outer peripheral surface 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. It has become.

Next, the operation of the hinge unit 10 according to the present embodiment will be described. As shown in FIG. 6, when the lid 20 is closed, the top 3 of the cam surface 32 of the first cam body 38 is closed.
2A and the valley portion 32B of the cam surface 32 of the second cam body 28 are not engaged with each other, and the cam surfaces 32 are not in contact with each other over the entire surface. That is, the first cam body 38 is pushed by the second cam body 28 urged by the compression coil spring 36,
The lid 20 is rotating around the shaft 34 in the direction of arrow F, and the lid 20 is pressed against the main body 14. Therefore, the lid 20 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 It is pushed back to the back of the storage part 24 so as to be pushed by the one cam body 38. Then, the first cam body 38 and the second cam body 28 are opened to a position where the tops 32A of the cam surfaces 32 abut against each other. There).

From here, 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, by the function of the cam surface 32, the moving force in the axial direction of the second cam body 28, which is pressed by the urging force of the compression coil spring 36, is applied to the first cam body 3.
8, which is converted into a rotational force. Then, as shown in FIG. 8, the lid 20 stops in a state where the cam surfaces 32 are in contact with each other over the entire surface (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 arrow M,
The top 32A of the cam surface 32 is separated from the valley 32B,
Since the cam body 38 rotates, the hinge unit 10 does not break.

As described above, in the present embodiment, the first cam body 38
By forming the cam surfaces 32 on the butting surfaces of the hinge unit 10 and the second cam body 28, the hinge unit 10 can be designed compact. For this reason, the space required for assembly is small. Further, the first cam body 38 and the second cam body 2
8 is directly attached to the lid 20 and the main body 14, so that the number of parts for constituting the hinge mechanism can be reduced.

It should be noted that the first cam body 38 and the second cam body 28 are common parts and can be formed by the same mold, so that the manufacturing cost can be reduced and the assembly of the hinge unit 10 becomes easy.

Further, 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.

Further, the opening angle of the lid 20 depends on the cam surface 32.
Can be adjusted by changing the shape of. Further, the present invention can be used not only for mobile phones but also for those having a fixed opening angle, such as a lid of AV equipment.

[0040]

According to the present invention, the number of parts is small and the mounting space is small. In addition, with the lid closed, there is no backlash, and a temporary assembly can be performed before assembling to the main body, thereby facilitating the mounting operation.

[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 lid of the mobile phone including the hinge unit according to the embodiment is opened.

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 the mobile phone with a lid opened, and FIG. 8C is a developed view showing a meshing state of a cam surface.

FIG. 9 is a perspective view showing a state where a lid of a conventional mobile phone is opened.

FIG. 10 is a sectional view showing a conventional hinge structure.

FIG. 11 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 34 shaft 36 compression coil spring (biasing means) 38 first cam body 40 flange portion (stopper) 44 E-ring (stopper) 51 projection (stop)

Claims (5)

[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,
A hinge mechanism, wherein cam surfaces are formed so as to come into contact with each other depending on the opening angle of the lid and to take a contact form from full contact to partial contact. 2. The hinge mechanism according to claim 1, wherein the first cam body and the second cam body have the same shape. 3. The cam surface is in full contact with the lid when the lid is opened and used, and when the lid is closed, the cam surface is brought into contact with the cam surface before reaching the full contact state. The hinge mechanism according to claim 1 or 2, wherein the cam surface is machined so as to contact the main body. 4. 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 an abutting surface with a cam body, the cam surface being in contact with and separated from the first cam body and the second cam body by a relative rotation angle to form a contact form from full contact to partial contact. A hinge unit comprising: 5. The hinge unit according to claim 4, wherein detents are formed on outer surfaces of the first cam body and the second cam body.