JP3001199B1 - Supporting point sliding hinge mechanism - Google Patents

Abstract

In a conventional configuration, there are various difficulties in controlling an opening / closing speed and holding a stop at an arbitrary opening angle, such as setting of a cam shape and setting of a spring coefficient. This leads to a decrease in reliability and an increase in cost due to an increase in the number of components and the number of components. Kind Code: A1 Two support pins arranged on a mounting trunk side of a lid, two cam grooves which slide by engagement of the support pins, and a main body provided with the cam grooves. A support 2 fixedly held on the side 3 and two resilient means 4 and 5 each of which is supported at one end by the support and applies an urging force to each support pin. Is rotated by the urging force of the resilient means, which changes by sliding in each cam groove, the frictional braking force between the support pin and the cam groove by the urging force, and the rotation by the load of the lid. By controlling the moment and the balance, the opening and closing operation of the lid is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge mechanism for a lid that opens and closes with respect to a main body, and more particularly to a lid opening / closing speed and a stop at an arbitrary open position by frictionally sliding a hinge supporting point. In the fulcrum sliding hinge mechanism, which can appropriately set the hinge.

[0002]

The opening and closing mechanism of the lid which covers the main body is usually
A hinge mechanism is used in which a rotation shaft is provided on one side and the rotation shaft is supported on the other side. The opening and closing operation of the lid is rotated about the rotation axis, and various functional forms are required for the functional operation depending on the specification and use of the article.

For example, in a lid of a notebook personal computer, a relatively heavy liquid crystal display is incorporated in the lid, and an arbitrary opening angle can be freely set in accordance with a demand for an appropriate screen tilt angle according to a use state. Therefore, a hinge mechanism that can hold the lid is required.

In addition, the lid of a copying machine is often heavy because it has a sensor, a paper feed mechanism, and the like in the lid, so that the lid can be smoothly opened and closed with a small force. When the body is pushed down and closed, it is left to close naturally under its own weight, but just before closing, it is required that the body be closed in a so-called soft landing shape without impact.
In addition, in consideration of the case where both hands are needed to slightly correct the position of a placed document, it is required that the document can be stopped and held even at a small opening angle.

[0005]

2. Description of the Related Art In response to this demand, conventionally, as disclosed in, for example, JP-A-56-57063, JP-A-58-42069, and JP-A-60-95428, An eccentric cam is mounted on the rotation shaft, and a coil follower that is in contact with the eccentric cam is resiliently biased to adjust the rotation speed by the generated frictional force. Such a mechanism is intended to vary the contact frictional force depending on the position of the cam ridge, and to control the frictional force against the closing force of the lid by its own weight to stop and hold at an appropriate opening angle or to control the opening / closing speed. Met.

[0006]

However, in the conventional structure, the expanding biasing force of the coil spring acting as a pressing force on the cam peak acts on the cam shaft in the direction of the tangent to the cam peak due to the pressing force. Since the opening / closing speed of the lid is controlled by the frictional force, a large coil spring having a large spring coefficient is required to hold the lid at an appropriate opening angle.

Further, in order to obtain a light opening / closing operation near a large opening angle, it is necessary to reduce the frictional force acting on the cam ridge, while the lid is closed in a so-called soft landing manner near the moment when the lid closes to the main body. Therefore, it was necessary to generate a large frictional force. Therefore, there are various difficulties in generating the above-mentioned conflicting frictional force only by the friction between the cam and the coil spring, such as setting the shape of the cam and setting the spring coefficient. In particular, the lid of a copier equipped with accessories such as a paper feed mechanism for each of many units becomes heavier, so the above configuration is more difficult, and a more complicated mechanism is required to deal with this. In this case, the number of components is increased, and as a result, there is a problem that the cost increases and a failure easily occurs.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and does not control the opening and closing operation of the lid by controlling the opening and closing of the lid but by controlling the opening and closing operation of the lid by a frictional force acting on a single rotating shaft. , The two support pins are slid in the separate cam grooves, respectively, so that the weight of the lid rotates by its own weight, and the rotation moment and the pressing force against the cam groove surface by the resilient means acting on the support pins. A fulcrum sliding hinge that balances and balances the friction braking force, thereby controlling the opening / closing speed of the lid with a small urging force of the resilient means, and holding the stop at an arbitrary opening angle. Provides a mechanism.

[0009]

Means for Achieving the Object In order to achieve the object, the present invention has the following configuration. That is, on the mounting trunk side of the lid, two support pins arranged in front and back as viewed from the open / close side, two cam grooves which the support pins respectively engage and slide, and A support member arranged and formed along the opening / closing direction and fixedly held on the main body side, one end of which is supported by the support, and the other end of which is engaged with each of the support pins to apply a biasing force. And each support pin is rotated by the biasing force of the spring means, which is changed by sliding in the respective cam groove according to the opening and closing of the lid, and the support pin by the biasing force. The opening / closing operation of the lid is controlled by balancing the friction braking force with the cam groove and the rotational moment due to the load on the lid.

[0010] As an example of the structure of the above-mentioned support, 2
The two side walls having the two cam grooves are spaced apart and face to face, and the support pins are respectively engaged and arranged between the facing cam grooves of the side walls so as to span each other. The cam groove is slid while maintaining a substantially parallel state.

[0011] The cam groove may be formed such that the groove extension is curved and the curvature is changed at an appropriate position in the groove. The curvature may be changed not only at one place but also at a plurality of places, and the connection of the changed curvatures may be made smoothly and continuously, or may be made to some extent stepwise.

[0012]

Next, specific embodiments of the present invention will be described in detail with reference to the drawings. FIG.
It is a partially omitted perspective view showing a part of the hinge mechanism of the embodiment, and FIGS. 2 to 5 are side views showing an opening and closing operation state thereof.

Reference numeral 1 denotes a lid. This lid 1
Is a mounting member 11 made of a channel material having a substantially U-shaped cross section attached to a lid plate 10 and an opening / closing stem side thereof, and a predetermined position at a front-rear position when viewed from the opening / closing side (right side in the drawing) of the mounting member 11. Two support pins 12 arranged and fixed at intervals of
13.

The cover plate 10 serves as an original cover for a copying machine, and a cover with a display for a notebook computer. Further, the support pins 12 and 13 are attached so as to bridge over the opposing surfaces of the channel material having a substantially U-shaped cross section, and with both ends exposed and extended to both sides.

Reference numeral 2 denotes a support. The support 2
Are two side wall plates 20 spaced apart from each other on a surface along the opening and closing direction and at a distance capable of holding the mounting member 11;
20 and the two side walls 20, 20 are connected and integrated,
And a base plate 21 to be attached to the main body 3.

Two cam grooves 23 and 24 having a curved groove extension are formed in the side wall plate 20 in a penetrating manner, and one of the cam grooves 23 (the right side in the drawing) has a substantially upper half. Is formed so as to project upward and to the right, and the lower half has an opposite curvature, and the cam groove 24 on the other side (left side in the drawing)
Is formed in a downward convex shape.

Various shapes and arrangements of the cam grooves 23 and 24 are conceivable. However, as will be described later, the two support pins 12 and 13 are in a positional relationship such that the two support pins 12 and 13 can move in parallel at a constant interval. There is a need.

The cam grooves 23, 24 formed on and opposed to the side wall plates 20, 20 are arranged so as to correspond to each other at a horizontal position. Each of the cam grooves 23, 24 is provided with a support pin 12, 1
The two end portions 3 are configured so as to be able to slide through the groove while penetratingly engaging with each other and maintaining a parallel state with each other.

A coil spring (hereinafter referred to as a "spring") as a resilient means is applied to each of the support pins 12 and 13 so as to expand and apply a pressing force between the support pin 12 and the portion of the support 2 on the main body 3 side. 4) and 5 are separately compressed and arranged.

That is, the spring 4 is attached at one end via an end flange 40 of a locking pin 25 fixed to the front side (right side in the drawing) of the side wall plate 20 of the support 2 in a bridging manner. The end side is a support pin 1 via an end flange 41.
2

The spring 5 has one end on the support 2.
Of the locking pin 26 fixed in a bridging manner on the rear side (left side in the drawing) of the side wall plate 20 through the end flange 50, and the other end side of the support pin 13 through the end flange 51.
Is in contact with

Each of the end flanges 40, 41, 50, 5
At the center of the contact surfaces of the springs 4, 5, cylindrical projections 42, 52 to be fitted to both ends of the springs 4, 5 are formed, and at the opposite side, hook-shaped engagement recesses 43, 53 are formed. By being formed, they are engaged and held so as to straddle the side circumferences of the support pins 12 and 13 or the locking pins 25 and 26, respectively, and are configured to be rotatable.

[0023]

Next, an operation process of the hinge mechanism of the embodiment having the above-described configuration will be described with reference to an explanatory diagram shown in FIG. 1) When the cover 1 is at the position (A) with the cover 1 closed.

When the cover 1 is closed, the support pins 12 and 13 of the mounting member 11 are in a substantially horizontal positional relationship. At this time,
A clockwise rotation moment (W × a) due to the own weight W of the lid 1 acts on the rotation point O.

The biasing force (pressing force) Fb from the spring 5 acts slightly upward on the support pin 13, so that a clockwise rotational moment is further applied.
Rotation is limited to some extent by the friction with.

On the other hand, a counterclockwise rotational moment acts on the support pin 12 by the urging force (push-up force) Fa from the spring 4, but a clockwise rotational moment acts more on the pivot point O. Thus, the lid 1 is kept closed. 2) When the lid 1 is in (A)-(B).

Next, between (A ') and (B), the force in the opening direction from the outside with a human hand (counterclockwise rotational moment)
Is added, the lid 1 can be moved with a light force. During the movement to the position (B), the rotational moment of its own weight gradually decreases to W × a> W × b. Conversely, in this movement process, the support pin 13 moves downward along the cam groove 24. Although it moves, the biasing force Fb still substantially perpendicularly strikes the cam groove 23, and acts in a direction to limit the rotation by the friction braking force. Further, the urging force Fb is different from the groove wall of the cam groove 23,
Also acts on the groove wall of the cam groove 24 to generate friction braking force,
It also acts as a function of controlling the movement of the support pin 12.

Here, if the additional force by hand is eliminated, the clockwise self-weight rotational moment (W × a to W × b) described above is obtained.
The rotational moment at the pivot point O is balanced by the counterclockwise rotational moment due to the urging force Fa acting on the support pin 12 due to the movement in the cam groove, and the friction control between the cam groove 23 and / or the cam groove 24. Then, the lid 1 stops at an arbitrary position between them.

Conversely, between (A ') and (A), when a force (clockwise rotation moment) in the direction of closing with a hand or the like is slightly applied from outside, the balance is slowly closed while the above balance is lost. The body 1 is closed to the body 3 in a so-called soft landing manner. 3) The case where the lid 1 is located from (B) to (C).

Between these positions, similar to the above 2),
The clockwise self-weight rotational moment (W × b to W × c) gradually decreases, and the counterclockwise rotational moment due to the urging force Fa to the support pin 12 also tends to decrease.

On the other hand, the urging force Fb applied to the support pin 13 decreases the frictional force and increases the counterclockwise rotation moment because the moving direction of the support pin 13 is along the extension direction of the cam groove 13. . As a result, even in this section, there is a balance position of the rotational moment, and the lid 1 is kept stopped unless a force is applied from the outside. Therefore, neither the movement in the opening direction nor the movement in the closing direction,
It can be performed with only a small force from the outside.

Further, in this embodiment, since the curvature of the cam groove 12 is changed at the position (C), a so-called click feeling is generated when the cam groove 12 passes therethrough. 4) The case where the lid 1 is located from (C) to (D).

Between these positions, in the movement in the opening direction, the clockwise own weight rotational moment (W × b to W × c) further decreases and the urging force F, as in the above 3).
The counterclockwise rotational moment due to a also decreases. To compensate for this, the counterclockwise rotational moment due to the urging force Fb increases, the rotational moment as a whole is balanced, and the lid 1 can be stopped at any free position. Further, by applying a small force necessary to break this balance from the outside, the opening and closing operation can be easily performed.

In consideration of the above operation, the curvatures and shapes of the cam grooves 23, 24, and the cam grooves 23, 24 and the support pins 25, 2
By appropriately selecting the state of friction with the spring 6 and the spring coefficients of the springs 4 and 5, it is possible to appropriately set the stop / hold at various opening / closing speeds and arbitrary opening angles.

[0035]

[Possibility of Another Modified Embodiment] In the above embodiment, the coil spring is used as the resilient means.
A leaf spring or a torsion bar may be used.

Further, one mounting member 11 and a pair of front and rear springs 4 and 5 are disposed between the side wall plates 20 and 20 of the support 2, but the present invention is not limited to this. A plurality of sets of the mounting member 11 and the springs 4, 5 may be arranged by increasing the interval between the side wall plates 20, 20.

Further, in addition to the lid of the above-described example, the hinge mechanism of the present invention may be used, for example, as a hinge for an indoor / outdoor door, or as an opening / closing hinge for a trunk lid or a hood of a car, and also for a toilet seat of a toilet bowl. It can be widely used as an open / close hinge.

[0038]

As described above, the present invention has the following advantages. In other words, since the balance is achieved by the two resilient means, it can be stopped and held at the opening / closing speed and any open position. Further, as the resilient means used for this, a small spring having a small spring coefficient can be used as compared with the conventional configuration of the eccentric cam and the spring, and the degree of freedom of appropriate setting can be increased.

Also, since it slides in the cam groove, it can be configured as a friction hinge by considering the friction between the cam groove and the support pin, and can be opened and closed by appropriately setting the curvature shape of the cam groove. The speed at the time can be changed according to the degree of opening, or a click feeling can be given, and a hinge mechanism of various specifications can be configured.

Further, since the rotational moment due to the weight of the lid body and the rotational moment due to the resilient means and the frictional force generated between the support pin and the cam groove are balanced, the resilient means is appropriately set. Thus, the present invention can be applied to lids having various weights, and the opening / closing force of the lid can be adjusted to set an appropriate opening / closing speed, or can be stopped and held at an arbitrary opening angle.

Further, in addition to making the shape of the groove a single curvature, when the curvature is changed at an appropriate position, a so-called click feeling or a temporary stop occurs at the time of passing the discontinuous point or the change point. It has the effect of inducing retention.

As described above, the present invention provides an inexpensive fulcrum sliding hinge mechanism with a reduced number of parts, a simple configuration, and less failures.

[Brief description of the drawings]

FIG. 1 is a partially omitted perspective view showing a hinge mechanism of the embodiment.

FIG. 2 is a side view showing an open / close operation state of the embodiment.

FIG. 3 is a side view showing an open / close operation state of the embodiment.

FIG. 4 is a side view showing an open / close operation state of the embodiment.

FIG. 5 is a side view showing an open / close operation state of the embodiment.

FIG. 6 is an explanatory diagram showing the acting force in the operation process of the embodiment.

[Brief description of reference numerals]

 DESCRIPTION OF SYMBOLS 1 Lid body 10 Lid plate 11 Mounting member 12, 13 Support pin 2 Support body 20 Side wall plate 21 Base plate 23, 24 Cam groove 25, 26 Lock pin 3 Main body 4 Spring 40, 41 End flange 42 Cylindrical convex part 43 Mating recess 5 Spring 50, 51 End flange 52 Cylindrical projection 53 Engaging recess

Claims (3)

(57) [Claims] 1. Two support pins (12, 13) arranged front and rear as viewed from the open / close side on the mounting trunk side of the lid (1), and the support pins (12, 13) engage with each other. Two cam grooves (23, 24) slidable in the same direction, and a support member (2) fixedly held on the body side with the cam grooves (23, 24) arranged and formed along the opening and closing direction of the lid (1). )
The supporting body (2) supports one end side, and the other end side engages with the supporting pins (12, 13) to apply an urging force.
And each of the support pins (12, 1) according to opening and closing of the lid (1).
3) is a rotational moment due to the biasing force of the resilient means (4, 5) that changes by sliding in the respective cam grooves (23, 24), and the support pins (12, 1) due to the biasing force.
3) The opening / closing operation of the lid (1) is controlled by balancing the frictional braking force between the 3) and the cam grooves (23, 24) and the rotational moment due to the load on the lid (1). A fulcrum sliding hinge mechanism characterized in that: 2. In the structure of the support body (2), two side walls (20) each having two cam grooves (23, 24) formed thereon are arranged facing each other with a space therebetween. 20), the support pins (12, 13) are engaged with each other so as to be bridged between the opposed cam grooves (23, 24).
4) The fulcrum sliding hinge mechanism according to claim 1, wherein the inside is slid while maintaining a substantially parallel state. 3. The fulcrum slide according to claim 1, wherein the cam grooves (23, 24) have a curved extension, and the curvature is changed at an appropriate position in the grooves. Hinge mechanism.