JPH0734750A - Revolving opening and shutting door mechanism - Google Patents

Abstract

PURPOSE:To prevent the damage caused by clashing with a revolving control member of a door revolving by dead weight with increasing speed and the generation of unpleasant impact sounds with simple construction at a low cost. CONSTITUTION:A notch section 11 with a notched height positioning the upper edge upward from the revolving center in the case a door is shut is provided to the lower end of the door 3. A flexible buffer member 12 forming the peripheral surface of a circular arc with a radius approximately equivalent to a distance from the revolving center of the shaft to the upper edge of the notch section in a position corresponding to a half-open state and with a radius larger than a distance from the revolving center of the shaft to the upper edge of the notch section in a position corresponding to a full-open state is placed to the inside of the notch section in a section from the half-open state to the full-open state of the door.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary opening / closing type door mechanism used as, for example, a protective cover for an operation panel provided on a side surface of an electronic device, a dustproof cover for inserting and removing a floppy disk, and the like.

[0002]

2. Description of the Related Art First, the structure of a conventional open / close type door mechanism will be described with reference to FIG. FIG. 3 shows a key operation panel unit 2 provided in a side cutout 1a of a store controller 1 used in a POS (point of sale information management) system.
A conventional example is shown in which a rotary opening / closing type protective cover 3 is attached so as to cover the.

The protective cover 3 is formed by bending four edges of a plastic plate substantially by the cutout height of the cutout portion 1a, and the shafts 4a and 4b are provided so as to project below the bent portions on both sides thereof. There is. On the other hand, bearings 5a and 5b are respectively formed on the lower side portions of the cutout portion 1a which face each other. By fitting the shafts 4a and 4b into the bearings 5a and 5b, the protective cover 3 is attached to the cutout portion 1a. 4a, 4b
It is attached so that it can rotate around. And FIG.
As shown in FIG. 3A, with the protective cover 3 almost upright, the locking claws 6 on the protective cover 3 side shown in FIG.
The key operation panel portion 2 is closed by the protective cover 3 by locking a with the locking portion 6b on the side of the cutout portion 1a.

Here, the protective cover 3, the shafts 4a and 4b, the bearings 5a and 5b, and the locking means 6a and 6b constitute a rotary door type door mechanism.

By the way, in the conventional rotary opening / closing type door mechanism, the protective cover 3 becomes rotatable about the shafts 4a and 4b when the locking state by the locking means 6a and 6b is released. Then, unless there is a member that restricts the rotation on the rotation path of the protective cover 3, the protective cover 3 rotates 180 degrees or more from the closed state.

However, since the electronic devices such as the store controller 1 are usually mounted on the console 7 for use,
As shown in FIG. 3B, the turning operation of the protective cover 3 is restricted by the operation console 7 when it is turned by approximately 90 degrees from the upright state. Generally, in this state, the protective cover 3 is fully opened, and the operator operates the key operation panel section 2 opened from the protective cover 3.

[0007]

However, in the conventional rotary opening / closing door mechanism of this type, the locking means 6 is used.
When the protective cover 3 is released from the locked state by the a and 6b, and the protective cover 3 is slightly tilted in the rotating direction from the upright state, the protective cover 3 rotates about the shafts 4a and 4b by its own weight. As it moves and accelerates to full opening, console 7
There is a risk that the protective cover 3 may be damaged due to a large impact when it collides with the table surface. In addition, many people felt uncomfortable, even if they were not damaged, and the collision sound was loud.

There is an upper cover of a personal computer, a word processor, or the like that rotates about an axis by its own weight as in the case of the opening / closing door mechanism. Since an indicator is generally incorporated in the upper cover, it is necessary to minimize the impact when opening and closing. Therefore, a shock of opening and closing the upper cover is absorbed by using a hydraulic or air damper.

However, since this type of damper has a complicated structure and is expensive, when it is used as a cushioning means such as a protective cover for the key operation panel or a dustproof cover for the floppy disk insertion / removal opening, the cost of the product increases. Leads to.

Therefore, according to the present invention, even if the door is rotated by its own weight to perform the opening operation, the rotation of the door can be regulated without impact on the door before the door is fully opened. Therefore, it is an object of the present invention to provide a rotary door type door mechanism capable of suppressing the impact with other members caused by the full opening of the door as much as possible, and preventing the damage of the door and the generation of an unpleasant impact sound at low cost.

[0011]

SUMMARY OF THE INVENTION According to the present invention, the lower end portions of both sides of a door are rotatably supported by a shaft on one side surface of an equipment main body, and the door is held upright by a locking means in a substantially upright state. When the door is locked on one side of the main body of the equipment, and when the locking state by the locking means is released, the door is rotated about its axis by its own weight to open the door. A cutout with a cutout height whose upper edge is located above the center of rotation of the shaft when the door is closed is provided on the lower end surface, and the cutout in the section from the half-opened state to the fully-opened state At the corresponding position, the radius is approximately equal to the distance from the rotation center of the shaft to the upper edge of the notch, and at the position corresponding to the fully open state, the radius is larger than the distance from the rotation center of the shaft to the upper edge of the notch. Flexible cushion formed by forming an arcuate outer peripheral surface It is obtained by placing the wood.

[0012]

According to the present invention having such a structure, when the locked state between the door and the device body by the locking means is released and the door is tilted in the rotation direction from the upright state, the hand is released from the door. ,
The door rotates about its axis due to its own weight and opens. Then, when the door is rotated to the half-opened state, the upper edge of the notch provided in the lower end surface of the door comes into contact with the arc outer peripheral surface of the cushioning member. As a result, the rotation speed of the door is weakened. afterwards,
The door is fully opened while bending the cushioning member. Therefore, the impact between the door and the rotation restricting member at the time of full opening is extremely small compared to the case where the door is accelerated to rotate due to its own weight to collide.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary opening / closing type door mechanism of the present invention will be described below with reference to FIG.
1 and 2 for an embodiment applied to a so-called protective cover 3, which is a door for covering the key operation panel portion 2 provided in the side cutout portion 1a of the store controller 1 as in the conventional example shown in FIG. Explain.

FIG. 1 is a perspective view showing the outer appearance of the main part of the store controller 1 in this embodiment, and FIG.
FIG. 7 is a diagram showing a cross section taken along the line A of FIG.

Incidentally, FIG. 2 (a) is a sectional view taken along the line AA in the state where the protective cover 3 is closed, and FIG. 2 (b) is a state in which the protective cover 3 is open up to about 45 degrees (half open state). 2A is a sectional view taken along the line AA, and FIG. 2C is a sectional view taken along the line AA when the protective cover 3 is open up to about 90 degrees (fully opened state).
(D) is a cross-sectional view taken along the line AA in the state where the protective cover 3 is opened up to about 135 degrees.

Also in this embodiment, similarly to the conventional example, the protective cover 3 is formed by bending the four edges of the plastic plate substantially by the cutout heights of the cutouts 1a and forming the protective cover 3 on both sides. By fitting the shafts 4a and 4b projecting downwards into the bearings 5a and 5b formed respectively on the lower side portions of the opposite sides of the cutout portion 1a, the protective cover 3 is centered on the cutout portion 1a about the shafts 4a and 4b. And rotatably attach. Then, in a state in which the protection cover 3 is substantially upright, the locking claw 6a (not shown in FIGS. 1 and 2) on the protection cover 3 side is locked to the locking portion 6b (not shown in FIGS. 1 and 2) on the cutout 1a side. Key operation panel section 2 by locking the key operation panel section 2
(Not shown in FIGS. 1 and 2) is closed by a protective cover 3.

On the other hand, this embodiment is different from the conventional example in that
The point is that a cutout 11 is formed in the lower end surface of the protective cover 3, and a buffer member 12 is provided in the cutout 11. Therefore, the configurations of the cutout portion 11 and the cushioning member 12 will be specifically described.

The notch 11 is formed by notching the central portion of the lower end surface of the protective cover 3 in a U-shape, and the notch height is
As shown in FIG. 2A, the upper edge 11a is located above the rotation center P of the shafts 4a and 4b. Here, for convenience of description, the distance from the rotation center P to the upper edge 11a is L1.

The notched upper edge and both side edges are bent substantially by the notch height of the side notch 1a of the store controller 1, so that the key operation panel is pressed from the lower end side when the cover is closed. Dust and the like are prevented from entering the section 2.

The cushioning member 12 is made of a flexible and flexible plate material such as polypropylene or polyacetal. As shown in FIG. 2A, one end of the cushioning member 12 has a screw 13 or the like on the inner bottom surface of the housing of the store controller 1. It is fixed. On the other hand, the other end side is bent at a substantially right angle from the inner bottom surface of the housing along the side surface of the housing, and further at a distance L2 (L2 <L1) from the center of rotation of the shafts 4a and 4b. It projects from the side surface of the housing into the notch 11. Also,
The portion protruding from the notch 11 is bent in an arc shape with the center of rotation P of the shafts 4a and 4b as the center of the circle.

Here, an angle of about 45 degrees upward from the center of rotation P, that is, as shown in FIG.
In the position corresponding to the half open state, the radius R1 of the circular arc is substantially equal to the distance L1 from the rotation center P to the upper edge 11a of the notch 11, and the angle substantially horizontal to the rotation center P, that is, FIG. ), The radius R2 of the circular arc is larger than the distance L1 at the position corresponding to the fully opened state of the protective cover 3, and the angle downward from the rotation center P by about 45 degrees,
That is, as shown in FIG. 2D, the protective cover 3 is almost 1
At the position corresponding to the state of being opened up to 35 degrees, the other end side of the cushioning member 12 is bent in an arc shape so that the radius R3 of the arc forms an arc outer peripheral surface 12a substantially equal to the distance L1.

In this embodiment thus constructed, in the closed state in which the protective cover 3 is locked in the side surface notch 1a by the locking means 6a, 6b, as shown in FIG. 2 (a). The upper edge 11a of the cutout portion 11 of the protective cover 3 in a substantially upright state is not in contact with the cushioning member 12.

Therefore, when the locked state by the locking means 6a, 6b is released, and the protective cover 3 is slightly tilted in the rotating direction from the upright state, the protective cover 3 is released by its own weight when the hand is released. It rotates about the shafts 4a and 4b to perform an opening operation.

Then, as shown in FIG. 2B, the upper edge 11a of the notch 11 in the protective cover 3 is the arc outer peripheral surface of the buffer member 12 at a radius equal to the distance L1 from the center of rotation P to the upper edge 11a. Contact 12 afterwards,
Since the radius of the arcuate outer peripheral surface 12 gradually becomes larger than this contact point, the rotational speed of the protective cover 3 is sharply weakened,
The rotation of the protective cover 3 stops at a position slightly lower than the contact point. As a result, the protective cover 3 is stopped in a half-open state in which it is tilted by approximately 45 degrees. At this time, since no shock is applied to the protective cover 3 due to a collision with a rotation restricting member such as a desk, the protective cover 3 is not damaged or an unpleasant impact sound is not generated.

The stop position of the protective cover 3 varies depending on the radius of the arcuate outer peripheral surface 12a of the cushioning member 12, the weight of the protective cover 3, the material and thickness of the cushioning member 12, and the like.

As described above, even when the protective cover 3 is rotated from its substantially upright state by its own weight, the protective cover 3 is automatically stopped in the half-open state. Therefore, in order to fully open the protective cover 3, the protective cover 3 is pushed from above and the shaft 4
It may be rotated about a and 4b.

At this time, the protective cover 3 bends the arcuate portion of the cushioning member 12 toward the center of the circle, and the shafts 4a, 4a.
Rotate around b. Therefore, as shown in FIG. 2 (c), when the radius R2 of a substantially horizontal angle with respect to the rotation center P becomes substantially equal to the distance L1, the protective cover 3 becomes approximately 9 mm.
When the protective cover 3 is further pushed down with the fully tilted state of 0 degree, the protective cover 3 comes into contact with the surface of the desk 7 on which the store controller 1 is placed, but the shock at this time is due to the resistance that bends the cushioning member 12. It will be extremely small.
Therefore, the protection cover 3 is not damaged or an unpleasant impact sound is not generated due to the collision with the desk 7.

It should be noted that, in a state where there is no regulating member such as a desk, it is possible to open the protective cover 3 to a wider angle by further pushing the protective cover 3.

In addition, for example, when closing from the state of being opened up to 180 degrees, the radius R3 of the arcuate outer peripheral surface 12a is made substantially equal to the distance L1, so that it is returned to about 135 degrees as shown in FIG. 2 (d). Protection cover 3
The upper edge 11a of the cutout portion 11 at the end abuts on the tip of the arc-shaped outer peripheral surface 12a of the cushioning member 12, and after that, about 4
The protective cover 3 can be rotated while bending the cushioning member 12 up to the half-opened state of 5 degrees. Therefore, it can be surely closed.

As described above, according to this embodiment, the notch 11 is formed in the lower end surface of the protective cover 3, and the notch 11 has a flexible and flexible plate material such as polypropylene or polyacetal. With the simple and inexpensive structure in which the cushioning member 12 is simply formed, the protective cover 3 can be automatically stopped before it collides with the desk 7 or the like even when the protective cover 3 is rotated by its own weight and opened. it can.

Therefore, damage to the protective cover 3 and generation of unpleasant impact noise can be prevented at low cost without using an expensive air damper or the like, and the price of a product requiring the protective cover 3 of this type can be reduced. Can be planned.

The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the central portion of the lower end surface of the protective cover 3 is notched, and the cushioning member 12 is provided in the notched portion 11. However, the protective cover 3 is notched near both sides of the lower end surface, and these notches are provided. Cushioning member 12
May be provided. Further, in the above modification, the central portion may be further cut out, and the cushioning member 12 may be provided in the notched portion in the central portion.

Further, in the above embodiment, the state in which the door is opened to approximately 45 degrees is set to the half open state, but the angle in the half open state is not limited to this, and may be an angle between the closed state and the fully open state. Good.

In addition to the protective cover for covering the key operation panel, the present invention can be applied to a rotary opening / closing door mechanism for various devices such as a dustproof cover for inserting and removing a floppy disk.

In addition, it goes without saying that various modifications can be made without departing from the scope of the present invention.

[0036]

As described above in detail, according to the present invention, the lower end surface of the door is provided with a notch portion having a notch height such that the upper edge thereof is located above the rotation center of the shaft when the door is closed. ,
In the notch part of the section where the door is in the half-open state to the full-open state,
At the position corresponding to the half open state, the radius is approximately equal to the distance from the center of rotation of the shaft to the upper edge of the notch, and at the position corresponding to the fully open state, from the distance from the center of rotation of the shaft to the upper edge of the notch. Even if the door rotates by its own weight and opens, it has a simple and inexpensive structure in which a flexible cushioning member having an arcuate outer peripheral surface with a large radius is arranged. The rotation of the door can be restricted without being applied with an impact, so that the impact with other members caused by the full opening of the door can be suppressed as much as possible, and the damage of the door and the generation of an unpleasant impact sound can be prevented at low cost. A pivotable door mechanism can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing an outer appearance of a main part of an embodiment of the present invention.

FIG. 2 is a view showing a cross section taken along the line AA of FIG. 1 in accordance with an opened / closed state of a protective cover.

FIG. 3 is a perspective view showing a structure of a conventional rotary opening / closing door mechanism.

[Explanation of symbols]

 3 ... Protective cover (door) 4a, 4b ... Shafts 5a, 5b ... Bearings 6a, 6b ... Locking means 11 ... Notch 11a ... Upper edge 12 ... Buffer member 12a ... Arc outer peripheral surface

Claims (1)

[Claims] 1. A side surface of an equipment body rotatably supports both lower ends of both sides of the door by a shaft, and when the door is substantially upright, the door is attached to the equipment body by a locking means. A rotary opening / closing door mechanism in which the door is closed by being locked to a side surface, and when the locked state by the locking means is released, the door is rotated around its axis by its own weight to perform an opening operation. On the end face, when the door is closed, an upper edge is provided with a notch portion having a notch height located above the rotation center of the shaft, and in the notch portion of the section from the half-open state to the fully-open state of the door, At the position corresponding to the half-opened state, the radius is approximately equal to the distance from the rotation center of the shaft to the upper edge of the cutout portion, and at the position corresponding to the fully opened state, the rotation center of the shaft is separated from the cutout portion. Radius greater than distance to top edge Rotationally openable door mechanism, characterized in that a cushioning member having flexibility obtained by forming an arc outer peripheral surface.