JPH0453431Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention is designed to rotate one end of a rotating body approximately horizontally around a horizontal axis for immovable objects that are used stationary on the floor, on a desk, on one's lap, etc. The present invention relates to a hinge device that is connected so that it can rotate within an angular range of 180° from a state and can be stopped at any angle.

To explain in more detail, for example, a cosmetic case is a box for storing cosmetics and cosmetic tools, and a lid with a mirror inside is connected at one end so as to be rotatable around a horizontal axis, or a keyboard and a calculation control unit/memory. A small electronic computer ( or a word processor (the same applies hereinafter), when using a presentation case or a small computer placed on a desk or lap, depending on the height of the user's viewpoint,
The suitable angle of the mirror or display varies. This invention is based on a hinge for attaching a rotating body such as the mirror, the display section, or a lid to which these are attached to an immovable body such as the box or the main body of the computer so that it can rotate around the horizontal axis. It is related to the device.

[Prior art and its problems] As shown in FIG. 6, this type of conventional hinge device has a disk 2' fixed to the outer periphery of a support shaft 1' fixed to a rotating body. A large number of recesses 3' are provided on the outer periphery of the disk 2', and a compression spring 6' having a steel ball 5' at its tip that can fit into the recesses 3' is placed in a guide 4' provided on an immovable body. It was constructed so that it could be fired at a certain area.

Therefore, the rest angle of the rotating body is gradual,
It cannot be adjusted steplessly according to the user's viewing angle, and the concave portion 3' cannot be adjusted due to frequent rotation of the rotating body.
As the corners of the recesses wear out, the rotation restraining force of the steel balls that overcomes the load on the rotating body decreases, and depending on the angle at which the rotating body rests, the rotating body may fall down due to its own weight. While the wear of the steel ball is low, the sound of the steel ball fitting into the recess becomes a noise when the rotating body rotates.

In order to eliminate the problems of wear and noise in the recesses mentioned above and to enable the rotating body to stand still, a support shaft with a sliding flange is inserted into a sliding bearing provided on a stationary body, and the flange is slid by a compression spring. It is also conceivable to use a hinge device that is pressed against the bearing surface. However, in order to reliably stop the rotating body even at rotation angles other than the vertical position using only the sliding friction caused by the compression spring, it is necessary to use a compression spring that exerts a frictional force that overcomes the gravity of the rotating body. This creates a problem in that it is necessary to apply a large amount of force manually when rotating the rotating body, and if the frictional force of the bearing is minimized, the closed rotating body may move automatically while carrying a stationary object. The problem arises of opening.

[Technical Problem] In view of the above points, this invention is a hinge device that can steplessly stop a rotating body at any rotation angle by using sliding friction of a support shaft caused by a compression spring, and a torsion coil is provided on the support shaft. Using a spring together,
By installing the torsion coil spring in such a way that the torsion coil spring is in its natural state when the rotating body is vertical and accumulates a restoring force when the rotating body is rotated from the vertical position to the closed side and the open side, the rotating body Regardless of the rotation angle, a constant rotation inhibiting force is always obtained on the rotating body. Therefore, the rotating body can be easily rotated with a small force and stopped reliably at any rotation angle. The purpose is to enable the user to use the provided functions at any appropriate angle.

[Means for solving the problem] The force with which the flange provided on the support shaft is pressed against the sliding surface of the sliding bearing by the compression spring is constant regardless of the rotation angle of the rotating body (Fig. 5 F ₁ ),
The downward rotational moment due to gravity of the rotating body is 0 when the rotating body is vertical, and gradually increases as the rotation angle becomes less than 90° and reaches 0°, or as the rotation angle exceeds 90° and reaches 180° (FIG. 5, F ₂ ). Therefore, as the rotation angle of the rotating body changes from 90° to 0° and from 90° to 180°, the frictional force of the spring is reduced by the rotational moment, and the effective frictional force due to the compression spring, that is, the rotation restraint. Since the force decreases as shown in _F3 in FIG. 5, the rotating body rotates by its own weight when the rotation angle is less than θ ₁ ° and greater than θ ₂ °. This device accumulates a rotation return force (F ₄ in Figure 5) on the spindle of the rotating body when the rotating body is rotated from 90° (the rotating body is vertical) to 0° and from 90° to 180°. By installing a torsion coil spring, the rotation inhibiting force is kept constant at _F1 .

[Function] As mentioned above, by attaching a compression spring and a torsion coil spring to the support shaft, when the rotating body is rotated vertically upward, the rotation restraining force F ₁ is equal to the sliding friction force due to the compression spring, and When rotating a rotating body forward or backward from a vertical position, the rotation moment due to the weight of the rotating body depends on the rotation angle.
There is a risk that the rotation inhibiting force will be reduced due to the action of F ₃ and that it will not be stopped reliably, but the decrease in the rotation inhibiting force will be compensated for by the action of the torsion coil spring F ₄ , and in the end,
A constant rotation restraining force F ₁ is obtained which is approximately equal to the sliding friction caused by the compression spring when the rotating body is in a vertical state.

[Example of this invention] Next, a display is provided for a small computer placed on a desk or on one's lap, which rotates about a horizontal axis to open/cover the keyboard and expose/conceal the display part. An example in which the hinge device according to this invention is used when rotatably attaching a lid with a panel will be described.

A is a computer main body, which is equipped with a keyboard and an integrated circuit, and a hinge device B according to this invention is provided on both the left and right sides when the keyboard 12 is facing the user, and a support shaft that constitutes the hinge device is provided. One left and right ends of a lid C, which has a display panel D inside, are fixed to the outer end of the display panel 1, and the lid C is rotatably connected around the support shaft 1.

The hinge device B includes a sliding bearing 2 having a horizontal axis, which is fixed to the inner side of both left and right sides of the computer main body A, a fixing plate 3 installed inside the computer main body adjacent to the sliding bearing in the axial direction, and the above-mentioned. The support shaft 1 is rotatably passed through from the slide bearing to the fixed plate 3 and has one end protruding outside the computer main body, and the compression spring 4 and torsion wound around the support shaft inside the slide bearing and inside the fixed plate. The support shaft 1 has a cone-shaped sliding flange 6 with a tapered surface on the outside, and the compression spring 4 is attached to the support shaft 1 between the sliding flange 6 and the fixed plate 3. By wrapping, the sliding flange 6 is always pressed against the sliding surface 7 having the inner tapered surface of the sliding bearing 2.

Furthermore, the torsion coil spring 5 is connected to the fixed plate 3 and the support shaft 1.
One end of the torsion coil spring is connected to the fixed plate 3, and the other end is connected to the support shaft via a pin 8 protruding from the inner end of the support shaft. Fixed.

The hinge devices attached to both the left and right sides basically have the same configuration, but the torsion coil springs 5 have opposite twist directions.

For example, a pin 9 is passed through the outer protruding end of the support shaft 1, and a φ-shaped hole 10 that opens inward is formed at the base end 11 on both the left and right sides of the lid C, which is a rotating body. A cover C is fixed to the support shaft 1 in a non-rotatable manner by fitting the tip of the support shaft 1 to the pin 9 into the support shaft 10.

With the above configuration, the lid C can be closed to cover and protect the keyboard as shown in FIG. to release the keyboard 1
2 is exposed, and the display section D provided inside the lid can be stopped at an angle that is easy for the computer user to see.

In this case, when the rotation angle of the lid C is 90°, that is, when the center of gravity of the lid is on a vertical line passing through the axis of the support shaft 1, the rotation restraining force of the lid is applied to the sliding surface 7 of the sliding bearing 2 of the compression spring 4. equal to the frictional force against Therefore, it is sufficient to use a compression spring 4 that can provide a sliding friction to the extent that the lid does not easily rotate due to some force that may be applied to the lid C. When the lid is rotated backwards or forwards from the vertical position in order to make the display surface easier to see or to close the lid, the sliding friction F caused by the compression spring 4 occurs as the center of gravity of the lid moves. ₁ is reduced by the rotational moment F ₂ due to the gravity of the lid. However, at the same time, both the left and right torsion coil springs 5 generate a rotation return force F ₄ according to the amount of rotation of the lid from the vertical position.
As a result, the rotation restraining force Fa of the lid becomes Fa=F ₁ −F ₂ +F ₄ . Therefore, if the rotation return force F ₄ corresponding to the rotation angle of the torsion coil spring is made approximately equal to the rotation moment F ₂ caused by the movement of the center of gravity of the lid, the rotation restraining force of the lid can be maintained regardless of the rotation angle of the lid. , can always be kept almost constant.

That is, according to this invention, by appropriately setting the spring coefficients of the compression spring and torsion coil spring, the friction coefficient of the sliding bearing, and the load of the lid, the lid,
In other words, the rotating body can be rotated steplessly to any angle with a small force, and can be reliably stopped at that position, without colliding with the computer body, ie, an immovable object, when closing.

[Effects of this invention] As mentioned above, according to this invention, since a compression spring and a torsion coil spring are used together, the rotation restraining force is reduced due to the movement of the center of gravity according to the rotation angle of the rotating body. Corrected by the spring, a constant rotation inhibiting force is always obtained regardless of the rotation angle, so it can be rotated easily and stopped reliably at any angle.

[Brief explanation of the drawing]

1 and 2 show a small computer in which this invention is applied to the lid/display panel, and FIG. 1 is a perspective view showing the state with the lid closed, and FIG. 2 is a perspective view showing the state with the lid open. FIG. 3 is a cross-sectional view showing the essential parts of this invention, FIG. 4 is an exploded perspective view showing an example of the connecting structure of the support shaft and the lid, and FIG. 5 is a graph explaining the principle of operation of this invention. FIG. 6 is a side view showing a conventional technique. A... Computer main body (immovable body), B... Hinge device, 1... Support shaft, 2... Sliding bearing, 3... Fixed plate, 4... Compression spring, 5... Torsion coil spring,
6...Sliding flange, 7...Sliding surface, C...
Lid (rotating body).

Claims (1)

[Claims for Utility Model Registration] (a) A sliding bearing whose axis is horizontal, a fixed plate adjacent to the bearing in the axial direction, and a sliding flange that penetrates the sliding bearing and the fixed plate and has a sliding flange inside the sliding bearing. a support shaft whose one end protrudes outside the immovable body; a compression spring that is wound around the support shaft within the slide bearing and presses the flange against the sliding surface of the slide bearing; It consists of a torsion coil spring that is wound around the part that penetrates the fixed plate, has one end fixed to the fixed plate, and the other end fixed to the spindle, and accumulates a restoring force when the spindle rotates in a certain direction. ) A hinge device for a rotating body, which is attached to both left and right sides of the immovable body, and (c) has a horizontal rotation axis to which a base of the rotating body is fixed to an outer end of the support shaft.