JPH0991936A - Door opener - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a door opening / closing device that can secure a sufficient amount of engagement between a cam and a lever without affecting the size of the device body. [Composition] In the closed state, when the opening / closing lever 2 of the door 1 is rotated, the cam 3 engaged with the tip of the opening / closing lever 2 contacts the upper inner surface of the front panel 4, and the opening / closing lever 2 is further rotated. Continuing, the cam 3 rotates in the direction of arrow F, and the door 1 rotates in the direction of arrow E, so that a larger opening angle of the door 1 can be secured as compared with the conventional case.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door opening / closing device which is effectively used for a cassette insertion opening of a front panel of a video tape recorder or the like.

[0002]

2. Description of the Related Art In recent years, a mechanism for opening and closing a door and a lid by using a cam and a lever engaged with the cam has been used in various fields of equipment. However, in the conventional configuration, it is difficult to satisfy both the large amount of engagement and the space saving due to conflicting requirements, and an opening / closing mechanism that solves this is required.

A conventional door opening / closing device will be described below. FIG. 5 is a perspective view of a conventional door opening / closing device, and FIG. 6 is a side view of essential parts of the door opening / closing device. In FIG. 5 and FIG. 6, 1 is a door which can be rotated in the direction of arrow A, and 2 is an arrow B which has a rotating shaft 8 as an axis.
And an opening / closing lever that rotates in the C direction, 4 a front panel on which the door 1 is rotatably mounted, 5 a coil spring that is provided at the end of the door 1 and urges in the closing direction, and 6 represents the end of the door 1. Is a cam that is integrally provided with the opening / closing lever 2 and is engaged with the opening / closing lever 2. Reference numeral 7 denotes a mechanical portion provided with the opening / closing lever 2.
Further, in FIG. 6, reference numerals 1a, 2a, and 6a indicate the positions of the door, the opening / closing lever, and the cam when the door 1 is closed. Reference numerals 1b, 2b, and 6b indicate the positions of the door, the opening / closing lever, and the cam when the door 1 is open.

The operation of the conventional door opening / closing device configured as described above will be described below with reference to FIG.

First, in the closed state, the door 1 is in the first position 1a, the opening / closing lever 2 is in the first position 2a, and the cam 6 is in the first position 6a. When the door 1 is opened from this state, the opening / closing lever 2 rotates in the direction of arrow B from the first position 2a,
To position 2b. At that time, the tip of the opening / closing lever 2 pushes up the cam 6 integrally provided on the door 1 so that the door 1 moves from the first position 1a against the spring bias of the coil spring 5 to the second position 1b. As the cam 6 moves, the cam 6 contacts the upper inner surface of the front panel 4 and the door 1 is opened.

When the door 1 is changed from the open state to the closed state, the opening / closing lever 2 is rotated in the direction of arrow C, so that the door 1 is moved from the second position 1b to the first position by the spring bias of the coil spring 5. It moves to the position 1a and becomes a closed state.

[0007]

However, in the above-mentioned conventional structure, since the cam 6 is integrated with the door 1, the door 1 is opened only to the position where the cam 6 contacts the main body 4 when the door 1 is open. In order to obtain a sufficient opening angle, there is a method of making the cam 6 small, but the cam 6 of the opening / closing lever 2
Since the amount of engagement with respect to is reduced, there is a problem in that the possibility of disengagement during rotation is increased. Further, there is a method of moving the position of the contact portion of the front panel 4 with the cam 3 further upward, but there is a problem that the apparatus main body becomes large.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a door opening / closing device which does not affect the size of the main body of the apparatus and which can sufficiently secure the engagement amount of the cam and the lever. To do.

[0009]

In order to achieve this object, a door opening / closing device of the present invention is a door opening / closing device for opening / closing a door rotatably provided on a front panel. Is provided with a cam and an opening / closing lever whose tip engages with the cam to rotate, and the cam rotates when the opening / closing lever rotates and the door is opened.

[0010]

With this structure, the cam moves to the optimum position when the door is opened or closed, and does not depend on the amount of engagement between the cam and the lever or the size of the device body. The opening / closing mechanism can be realized.

[0011]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the entire construction of the door opening / closing device of the present embodiment, FIG. 2 is a side view of the essential parts showing the closed state of the door opening / closing device of the present embodiment, and FIG. FIG. 4 is a side view of an essential part showing a state immediately before a completely opened state, and FIG. 4 is a side view of an essential part showing the opened state of the door opening / closing device. In the figure, 1 is a door rotatably provided on a part of a front panel 4, 2
An open / close lever that is rotatable around a rotary shaft 8 is a cam that is attached to the end of the door 1, and is engaged with the open / close lever 2. 4 is a front panel on which the door 1 is rotatably mounted,
Reference numeral 5 is a coil spring that is provided at the end of the door 1 and urges it in the closing direction. Reference numeral 7 is a mechanism portion that is provided with the opening / closing lever 2.

The operation of the door opening / closing device of this embodiment constructed as described above will be described below with reference to FIGS.

First, when the door 1 is opened from the closed state of the door 1 of FIG. 2, the opening / closing lever 2 is rotated about the rotation shaft 8 in the direction of arrow D while the cam 3 is engaged at the tip thereof. The state shown in FIG. In FIG. 3, the cam 3 contacts the upper inner surface of the front panel 4, and if the opening / closing lever 2 continues to rotate from this state, the cam 3 rotates in the arrow F direction and the door 1 further moves in the arrow E direction. It turns to and becomes an open state as shown in FIG.

Further, when the door 1 is closed from the open state shown in FIG. 4, the opening / closing lever 2 is rotated in the direction of arrow G, so that the door 1 is rotated by the spring bias of the coil spring 5. It will be in a closed state as shown in FIG.

As described above, according to the present embodiment, the cam 3 is rotatably provided with respect to the door 1, and the cam 3 rotates in the open state of the door, so that the opening angle of the door 1 becomes the conventional one. In comparison, it can be made larger.

[0017]

As described above, according to the present invention, the door is provided with a rotatable cam, and when the door is opened, the cam rotates, so that the amount of engagement between the cam and the opening / closing lever and the size of the entire device are increased. It has an excellent effect that the opening angle of the door can be enlarged without changing the height.

[Brief description of drawings]

FIG. 1 is a perspective view of a door opening / closing device according to an embodiment of the present invention.

FIG. 2 is a side view of essential parts showing a closed state of the door opening / closing device in the embodiment.

FIG. 3 is a side view of an essential part showing a state immediately before a completely opened state of the door opening / closing device in the embodiment.

FIG. 4 is a side view of an essential part showing an open state of the door opening / closing device in the embodiment.

FIG. 5 is a perspective view of a conventional door opening / closing device.

FIG. 6 is a side view of a main part of a conventional door opening / closing device.

[Explanation of symbols]

 1 Door 2 Open / close lever 3 Cam 4 Front panel 5 Coil spring

Claims (1)

[Claims] 1. A door opening / closing device for opening and closing a door rotatably provided on a front panel, wherein a cam rotatably provided on the door and a tip thereof engages with the cam to rotate. A door opening / closing device, comprising: a moving opening / closing lever, wherein the cam abuts against an inner surface of the front panel to rotate during rotation of the door.