JPH09195611A - Hinge structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge structure which is not broken even when excessive force is applied on it and capable of stopping a revolving member at a specified angle without increasing the number of parts. SOLUTION: A pressure surface 28 is formed on a shaft 20 installed on a transmitting part 14. A pin 36 is stored in a recessed groove 34 formed on an inner peripheral wall of a shaft hole axially supporting the shaft 20, and it is energized to a center of rotation of the shaft 20 by a coil spring 38. When the shaft 20 is rotated and the pressure surface 28 comes to a position of the pin 36, the pin 36 energized by the coil spring 38 enters a clearance 34 and pressurizes the pressure surface 28, and accordingly, the shaft 20 is rotated and the pin 36 is positioned at a center of the pressure surface 28 and stabilized. Even when the shaft 20 is rotated in either direction from this state, the pin 36 pressurizes the pressure surface 28 and the shaft 20 returns to an original state. As the coil spring 38 is annular, even if there are a plural number of the pins 36, it is possible to energize them by the one coil spring 38.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge structure for rotatably supporting a rotating member on a main body.

[0002]

2. Description of the Related Art Conventional hinge structures include those disclosed in, for example, Japanese Utility Model Laid-Open No. 4-59286, Japanese Patent Laid-Open No. 4-160512 and Japanese Utility Model Laid-Open No. 61-38319. When the moving member comes to a predetermined position, the rotating member can be fixed at that position. Among these, the hinge structure described in Japanese Utility Model Laid-Open No. 4-59286 will be described.

As shown in FIGS. 9 and 10, the hinge structure 70 includes blades 72 attached to a main body (not shown).
The shaft 80 is inserted through the tubular body 74 and the tubular body 78 of the blade 76 attached to the rotating member. When the blade 72 is rotated, the shaft 80 also rotates.

The shaft 80 is composed of a deformed bar having an opening / closing locking surface 82. Further, a spring body 86 is provided in the recess 84 on the inner surface of the tube body 78. A pressing plate 88 that presses the open / close locking surface 82 is attached to the tip of the spring body 86.

When the opening / closing locking surface 82 of the shaft 80 reaches a position facing the pressing plate 88 as shown in FIG. 10 by the rotation of the rotating member, the pressing plate 88 urged by the spring body 86 is opened / closed. Since the locking surface 82 is pressed, the shaft 80 is stopped from rotating at that position and becomes stable, and the state is maintained. That is, the rotating member can be fixed to the main body at a predetermined angle.

However, in this hinge structure 70, since it is necessary to provide the spring bodies 86 corresponding to the number of the opening / closing engagement surfaces 82, the number of spring bodies 86 is increased and the assembly is troublesome.

Further, when the spring body 86 rattles in the recess 84 due to an error in molding, the pressing direction of the spring body 86 is decentered from the rotation center of the shaft 80, and the shaft 80 is accurately
Since the opening / closing locking surface 82 cannot be pressed toward the rotation center of the shaft, the shaft 80 may not be stable at a predetermined position.

Further, if an unreasonable force is applied in the direction of arrow C (see FIG. 9) due to an object hitting the rotating member, the blade 72
The side edge 72A of the blade and the side edge 76A of the vane 76 hit each other and cannot rotate, and the hinge may be broken, or the attachment part to the main body or the rotating member may be damaged.

[0009]

In consideration of the above facts, the present invention does not break even if an unreasonable force is applied, and the hinge structure can stop the rotating member at a predetermined angle without increasing the number of parts. Aim to get.

[0010]

A hinge structure according to claim 1 is a hinge structure for rotatably supporting a rotating member on a main body, the housing having a shaft hole attached to the main body or the rotating member. A groove formed in the shaft hole along the axial direction on the inner peripheral wall, a shaft attached to the rotating member or the main body and rotatably supported in the shaft hole, A pressing surface that is formed on the outer periphery and forms a predetermined gap with the inner peripheral wall of the shaft hole, a pin that is housed in the concave groove and is movable in the radial direction of the shaft hole, and a ring that is housed in the housing and is annular. Urging means for squeezing the pin from the outside and urging the pin toward the center of rotation of the shaft.

When the rotating member is rotated with respect to the main body, the shaft attached to the rotating member rotates together with the rotating member.

Here, the pressing surface formed on the shaft partially shortens the distance from the rotation center of the shaft to the outer peripheral surface. Therefore, when the shaft rotates and the pressing surface comes to the position of the pin, a gap is formed between the shaft hole and the pressing surface, and the pin urged by the urging means enters into this gap, and the pin is moved to the shaft. The state is closest to the center axis of. That is, the pin stabilizes at the shortest distance from the rotation center of the shaft to the outer peripheral surface, and when the shaft is rotated from this position, the biasing means is pushed by the pin to expand the diameter and generate a biasing force. , The rotating member rotates to return to its original state.

Further, the urging means is annular, and when the urging means is expanded by the pin, the urging means tries to reduce the diameter against this,
The pin is always biased towards the center of rotation of the shaft.

In the hinge structure according to a second aspect of the present invention, a plurality of the recessed grooves are formed in the housing, and the pin is housed in each recessed groove.

Since the plurality of pins are respectively accommodated in the concave grooves, a plurality of pressing surfaces can be formed on the shaft corresponding to these pins. Therefore, for example, if two parallel pressing surfaces are formed on the shaft and the pins are arranged so as to face each other so as to sandwich these pressing surfaces, the shaft is rotated with a stronger force or the shaft is maintained in a stable state. be able to.

Further, a plurality of pressing surfaces are formed on the shaft,
It can be stopped at a desired position.

According to a third aspect of the present invention, the hinge structure is characterized in that a plurality of the biasing means are accommodated so as to bias at least both ends of the pin.

Since the urging means urges both ends of the pin and the pin abuts the shaft over the entire axial direction, the eccentric urging force does not act along the axial direction of the shaft. Therefore, the shaft is not partially worn or rattled.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION A hinge structure 10 according to an embodiment of the present invention is used, for example, in a connecting portion between a main body 12 of a portable telephone and a transmitter 14 as shown in FIG.
The transmitter 14 also serves as a lid of the main body 12, and as shown in FIG. 4B, from the state in which the operation unit 13 of the main body 12 is closed,
After turning a predetermined angle, it becomes the most suitable angle for using the telephone as shown in FIG. 7 (B).

The hinge structure 10 has a housing 16 attached to a body 12, as shown in FIG.
The housing 16 has a shape in which a peripheral wall of a cylindrical body is cut out in the axial direction, so that the housing 16 is non-rotatably attached to the main body 12 and molding material is reduced. A donut-shaped shaft portion 18 is formed in a substantially intermediate portion in the axial direction of the inner peripheral wall of the housing 16, and the center of the shaft portion 18 is
It is a shaft hole 22 through which the shaft 20 is inserted.

A disk 24 is provided at the end of the shaft 20 to prevent a coil spring 38, which will be described later, from coming out of the housing 16.

The shaft 20 is provided with a pressing surface 28 which is symmetrical and parallel to the central axis, and the shaft 20 is partially reduced in diameter. A portion where the pressing surface 28 is not formed is an arc surface 30 having a diameter that slides on the shaft hole 22. Therefore, in the state of being axially supported by the shaft hole 22, the pressing surface 2
A crescent-shaped gap 32 is formed between 8 and the inner peripheral wall of the shaft hole 22 (see FIG. 5A).

A pair of recessed grooves 34 are formed in the inner peripheral wall of the shaft hole 22 so as to face each other along the axial direction of the housing 16, and the pins 36 are housed in the recessed grooves 34. Has become. Further, in the housing 16, two annular coil springs 38 are housed on both sides of the shaft portion 18, and the coil springs 38 narrow both ends of the pin 36 from the outside, so that the pin 36 is the center of rotation of the shaft 20. It is urged toward.

Therefore, as shown in FIG.
When the arcuate surface 30 of the shaft 20 comes to the position where 4 is formed, the pin 36 enters into the groove 34, and the coil spring 38
Press from the inside to make an elliptical curve. Therefore, the pin 36 is biased with a large force toward the center of rotation of the shaft 20.

Further, as shown in FIG. 6A, the pressing surface 28 of the shaft 20 is depressed by the rotation of the shaft 20 to form the concave groove 3.
4, the pin 36 enters the gap 32 by the urging force of the coil spring 38, tries to move toward the rotation center of the shaft 20, and pushes the pressing surface 28.
Press. As a result, a rotational force in the arrow B direction is generated on the shaft 20.

Further, as shown in FIG. 7 (A), the concave groove 3
When the pressing surface 28 of the shaft 20 comes to the position where the pin 4 is formed, the pin 36 enters the gap 32. In this state, when the shaft 20 slightly rotates, the pin 36 is pushed by the pressing surface 28 and moves away from the center of rotation of the shaft 20, and the pressing surface 28 is pressed by the biasing force of the coil spring 38, as shown in FIG.
I try to return to the state shown in. Therefore, the shaft 20 is most stable in this state.

The other end of the shaft 20 is fitted into the fitting hole 42 of the mounting shaft 40. The mounting shaft 40 has a cylindrical portion 4
6 and a square portion 48, and a square-shaped fitting protrusion 44 is provided on the square portion 40B so as to project.
A fitting hole (not shown) of the transmitter 14 is fitted into B and the fitting protrusion 44. In addition, the cylindrical portion 40
3 is fitted inside the housing 16 as shown in FIG. 3 to rotate integrally with the shaft 20 and prevent the coil spring 38 from coming out of the housing 16.

Next, the hinge structure 10 according to the present embodiment.
The operation of will be described. When the transmitter 14 is rotated with respect to the main body 12, the shaft 20 integrated with the mounting shaft 40 becomes
It rotates in the housing 16. Unlike the conventional hinge structure, the hinge structure 10 does not have the body 12 and the transmitter 14 attached via the blades.
Rotation from the state shown in FIG. 4 (B) in the releasing direction (arrow A direction), and in the use state shown in FIG. 7 (B), an inadvertent force is applied in the direction opposite to arrow C, and FIG. Even if it is rotated to the state shown in (), since the transmitter 14 can be further rotated in the releasing direction, the hinge structure 10 is not damaged.

The angle of the transmitter 14 most suitable for use in a portable telephone is set to 150 ° as shown in FIG. 7 (B), and in this state, the pressing surface 28 as shown in FIG. 7 (A). So that the pin 36 is located in the center of
Attach.

In this state, the pin 36 is closest to the center of rotation of the shaft 20, and the coil spring 38 approaches a circular shape to lightly urge the pin 36. Therefore, in this state, the transmitter 14 is slightly rotated in the closing direction (the direction indicated by the arrow C) to move the transmitter 14 to the main body 1 as shown in FIG.
When it becomes substantially perpendicular to 2, the pressing surface 28 becomes oblique with respect to the moving direction of the pin 36 as shown in FIG. 6A, and presses the pin 36 in the direction away from the rotation center of the shaft 20. As a result, the coil spring 38 is curved in an elliptical shape, and biases the pin 36 toward the rotation center of the shaft 20. Therefore, when the turning force applied to the transmitter 14 is released, the pin 36 presses the pressing surface 28, and the shaft 2
0 rotates in the direction of arrow B to rotate to the state shown in FIG. Therefore, the transmitter 14 also has a main body 1
It is held at an angle of 150 ° with respect to 2.

Similarly, from the state shown in FIG. 7B, the transmitter 14 is rotated in the direction opposite to the arrow C, and the transmitter 14 moves 180 degrees with respect to the main body 12 as shown in FIG. 8B. When the angle becomes °, the pressing surface 28 becomes the pin 36 as shown in FIG.
Since the pressing surface 28 is pressed by the pin 36 to rotate in the direction of arrow D, the shaft 20 is brought into the state shown in FIG. 7 (A). That is, no matter which direction the transmitter 14 is rotated from the state shown in FIG. 7 (B), a force to restore the original state is exerted.

When the transmitter 14 is further rotated in the closing direction (the direction opposite to the arrow B) from the state shown in FIG. 6B, the transmitter 14 is shown with respect to the main body 12 in FIG. 5B. It becomes a state. At this time, as shown in FIG.
Since the circular arc surface 30 comes to the position of the groove 34, the pin 36 is pressed outward. Therefore, the pin 36 is farthest from the rotation center of the shaft 20, and the coil spring 38 urges the pin 36 toward the rotation center of the shaft 20 most strongly. Therefore, when this state is exceeded, a large force is required to rotate the transmitting unit 14, and an appropriate click feeling occurs.

When the transmitter 14 is further rotated in the closing direction from the state shown in FIG. 5 (B), the pressing surface 28 is slanted to the pin 36 with respect to the moving direction as shown in FIG. 4 (A). It is positioned and pressed by the pin 36. Therefore, the transmitter 14 is rotated in the closing direction, and the main body 1 is rotated as shown in FIG.
Close the operation part of 2. In this state, the pressing surface 28 is positioned diagonally with respect to the moving direction of the pin 36, the pin 36 presses the pressing surface 28, and the rotational force in the closing direction is applied to the shaft 20, so that the transmitting portion 14 is in the closed state. Is maintained.

As described above, only the coil spring 38 stops the rotation of the transmitter 14 with respect to the main body 12 at a preset angle, and the transmitter 14 is unintentionally forced from the angle. Even with a slight rotation, the transmitter 14 can be returned to the set position against the force. The pin 36 is housed inside the annular coil spring 38, and the pin 3
Since 6 is squeezed from the outside and urged toward the center of rotation of the shaft 20, for example, even if the pin 36 rattles in the concave groove 34 due to an error during molding, the urging force is always applied to the center of rotation of the shaft 20. There is no eccentricity to face each other.

Although the object of the present invention can be achieved only by disposing the coil springs 38 on one side of the shaft hole 22, two coil springs 38 are housed on both sides of the shaft portion 18 as in the present embodiment. On the other hand, both ends of the pin 36 are urged toward the center of rotation of the shaft 20, and the pin 36 abuts and presses the shaft 20 over the entire axial direction. The biasing force is not applied. Therefore, the pin 36 does not partially hit the shaft 20 and the shaft 20 is not partially worn or rattled.

Further, in this embodiment, the pair of concave grooves 34
However, although the case where it is formed so as to face the inner peripheral wall of the shaft hole 22 is shown, only one concave groove may be formed. Even in this case, the pin housed in the groove presses the pressing surface 28 of the shaft 20, so that the transmitter 14 can be stopped at a predetermined position. Moreover, even if the transmitter 14 is rotated from the predetermined position, the transmitter 14 can be returned to the predetermined position. When two concave grooves 34 are formed facing each other as in the present embodiment, the transmitting portion 14 is stopped at a predetermined position with a stronger force, or the transmitting portion 14 is returned to the predetermined position. be able to.

Further, it is possible to set a plurality of angles for stopping the transmitting portion 14 with respect to the main body 12 and form the concave groove 34 corresponding to the plurality of angles so as to accommodate the pin 36. .

Even if the number of pins 36 is increased in this way, the pins 36 can be urged by at least one coil spring 38. That is, even if the number of the pins 36 is plural, it is not necessary to increase the coil spring 38, so that the increase in the number of parts can be suppressed. In addition, the pin 36 and the coil spring 38 can be easily assembled.

[0039]

Since the present invention has the above-mentioned structure, it can be stopped at a predetermined angle without being broken even if an excessive force is applied and without increasing the number of parts.

[Brief description of the drawings]

FIG. 1 is a perspective view of a mobile phone using a hinge structure according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a hinge structure according to an embodiment of the present invention.

FIG. 3 is a sectional view of a hinge structure according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a relationship between a shaft having a hinge structure according to an embodiment of the present invention and a transmitter section of a mobile phone using the hinge structure.

FIG. 5 is an explanatory diagram showing a relationship between a shaft having a hinge structure according to an embodiment of the present invention and a transmitter section of a mobile phone using the hinge structure.

FIG. 6 is an explanatory diagram showing a relationship between a shaft having a hinge structure according to an embodiment of the present invention and a transmitter section of a mobile phone using the hinge structure.

FIG. 7 is an explanatory diagram showing a relationship between a shaft having a hinge structure according to an embodiment of the present invention and a transmitter section of a portable telephone using the hinge structure.

FIG. 8 is an explanatory diagram showing a relationship between a shaft having a hinge structure according to an embodiment of the present invention and a transmitter of a mobile phone using the hinge structure.

FIG. 9 is a perspective view of a conventional hinge structure.

FIG. 10 is a cross-sectional view of a conventional hinge structure.

[Explanation of symbols]

 10 Hinge Structure 16 Housing 20 Shaft 22 Shaft Hole 28 Pressing Surface 34 Recessed Groove 36 Pin 38 Coil Spring (Biasing Means)

Claims (3)

[Claims] 1. A hinge structure for rotatably supporting a rotating member on a main body, comprising: a housing attached to the main body or the rotating member and having an axial hole; and a shaft formed in the axial hole on an inner peripheral wall. A recessed groove formed along the direction, a shaft attached to the rotating member or the main body and rotatably supported by the shaft hole, and an inner peripheral wall of the shaft hole formed on the outer periphery of the shaft. A pressing surface that forms a predetermined gap therebetween, a pin that is housed in the groove and movable in the radial direction of the shaft hole, and a ring that is housed in the housing and is narrowed down from the outside to the center of rotation of the shaft A hinge structure comprising: a biasing unit that biases toward. 2. The hinge structure according to claim 1, wherein a plurality of the recessed grooves are formed in the housing, and the pin is housed in each recessed groove. 3. The hinge structure according to claim 1, wherein a plurality of the biasing means are housed so as to bias at least both ends of the pin.