JP2509122B2 - Door opener for VCR - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video deck door opener for opening and closing a cassette door for closing a cassette insertion opening of a video deck.

[0002]

2. Description of the Related Art A conventional door opener for a video deck is shown in FIG. In FIG. 6, the lever member 1 has a center portion 1a pivotally supported by the chassis 2, one end 1b engaged with a cam 4 which rotates integrally with the drive gear 3, and the other end 1c engaged with the cassette door 5. Installed. The upper part of the cassette door 5 is the chassis bracket 2a
Is mounted so as to close the cassette insertion opening 2b of the video deck 6. And lever member 1
Is attached by biasing the cassette door 5 in the closing direction by a coil spring 7 having one end engaged with the lever member 1 and the other end engaged with the chassis 2.

In this conventional type door opener for a video deck, when the cassette is loaded, the cassette door 5 is pushed at the tip of the cassette. By this pushing, the cassette door 5 is rotated in the a direction and the lever member 1 is rotated in the b direction against the spring force of the coil spring 7, so that the cassette is loaded in the deck 6. After loading, the cassette door 5 and the lever member 1 are returned to the positions shown in FIG. 6 by the spring force of the coil spring 7, and the cassette insertion opening 2b is closed by the cassette door 5.

Further, in order to take out the cassette from the deck 6, a predetermined switch (not shown) is turned on to rotate the drive gear 3, and the rotation causes the cam 4 to be c.
Rotate in the direction. The lever member 1 is pushed by the rotating cam 4 and rotates in the d direction against the spring force of the coil spring 7, and the cassette door 5 rotates in the a direction to open the cassette insertion opening 2b. . This open cassette insertion slot 2
The cassette is carried out from b.

[0005]

As described above, in the conventional door opener for a video deck, the closing operation of the cassette door is performed by the coil spring. The coil spring used at this time has a small wire diameter and a small coil spring. Therefore, it is difficult to handle, and the coil springs are entangled with each other, which causes a difficulty in assembling.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a door opener for a video deck, which is excellent in assemblability and requires a small number of parts to be assembled without using a coil spring. It is in.

[0007]

In order to achieve the above-mentioned object, the present invention has a central portion pivotally supported by a chassis, one end engaged with a cam that rotates integrally with a drive gear, and the other end engaged with a cassette door. In addition, in the door opener, which is provided with a lever member for urging the cassette door in the closing direction, the lever member is rotated in the anti-urging direction by the driving of the drive gear to open the cassette door. The biasing means is formed by a tongue piece extending to the lever member and a boss protruding from the chassis and engaging with a free end of the tongue piece.

[0008]

Since the present invention has the above-described structure, the cassette door is biased in the closing direction by the elastic force of the tongue piece integrally extended to the lever member.

[0009]

The present invention will be described in detail below with reference to the illustrated embodiments. FIG. 1 shows an assembled state of a video deck door opener according to the present invention. This opener has substantially the same assembly structure as the above-mentioned conventional door opener for a video deck, except for the lever member. Therefore, the same elements as those of the conventional door opener for a video deck will be described with the same reference numerals.

The lever member 10 has a central portion 10a pivotally supported by the chassis 2, one end 10b engaged with a cam 4 which rotates integrally with the drive gear 3, and the other end 10c engaged with the cassette door 5. It is installed. At this time, the engagement between the one end 10b of the lever member 10 and the cam 4 is free to rotate in the direction in which the lever member 10 separates from the cam 4 (direction d).

As shown in FIGS. 2 to 4, the lever member 10 has a substantially L-shaped planar shape (FIG. 3), and a boss hole 11 is formed in the central portion 10a.
0b is an engaging piece for the cam 4, and the other end 10c is an engaging end for the cassette door 5. Also, the lever member 10
Has an engaging projection 12 that engages with the cassette door 5 at the other end 10c, and a lightening portion 13 is formed at an intermediate portion between the engaging projection 12 and the boss hole 11, and A tongue piece 14 is provided on the lightening portion 13. The tongue piece 14 is integrally extended from one side 13a of the lightening portion 13, and its tip is a free end. Such a lever member 10 is usually integrally formed of plastic.

The lever member 10 thus formed is
By inserting the boss hole 11 into the boss 15 formed to project on the chassis 2, the boss 15 is pivotally supported on the chassis 2. As shown in FIG. 1, the lever member 10 is attached such that the free end of the tongue piece 14 is brought into contact with another boss 16 projectingly formed on the chassis 2, one end 10b is engaged with the cam 4, and the other end is attached. This is performed by engaging the engagement protrusion 12 provided on the cassette 10c with the cassette door 5.

The door opener for a video deck according to the present embodiment thus assembled operates as follows. Loading of the cassette is performed by pushing the cassette door 5 at the tip of the cassette. By this pushing, the cassette door rotates in the a direction and the lever member 10 rotates in the b direction. At this time, the lever member 10 is rotated while the boss 15 is the center of rotation and the tongue piece 14 is bent. After loading the cassette, the lever member 10 is rotated in the direction opposite to the b direction by the elastic force of the tongue piece 14, and the cassette door 5 is rotated in the closing direction to return to the closed state of FIG.

To carry out the cassette in the video deck 6, the drive gear 3 is rotated by turning on a predetermined switch (not shown), and this rotation causes the cam 4 to rotate in the c direction. The lever member 10 is pushed by the rotating cam 4 and rotates in the d direction against the elastic force of the tongue piece 14 and the cassette door 5 in the a direction. Open 2b. At this time, the tongue piece 14 bends and repulsive energy is accumulated. The cassette is carried out from the opened cassette 2b.

After unloading the cassette, the drive gear 3 rotates in the opposite direction to that during unloading, the cam 4 rotates in the e direction, and the lever member 10 moves in the f direction due to the repulsive energy accumulated on the tongue piece 14. To rotate the cassette door 5 in the closing direction. As a result, the closed state of FIG. 1 is restored.

As described above, since the elasticity of the tongue piece 14 is used only for a short time when the cassette is loaded and unloaded, it is not used at all during the playing of the cassette and other operations, so that the tongue piece 14 is made of plastic. Even if it is integrally formed, sufficient durability can be maintained without causing any settling or damage.

[0017]

As described above, according to the present invention, the tongue piece integrally formed with the lever member for opening and closing the cassette door is provided with the function of urging the cassette door in the closing direction. The cassette door can be closed without using the biasing means. Therefore, it is possible to reduce the number of parts at the time of assembling, and at the same time as assembling the lever member, the biasing force of the lever member in the closing direction of the cassette door can be obtained at the same time. Produce an effect.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a video deck equipped with a door opener for a video deck according to the present invention.

FIG. 2 is a front view of a lever member of a video deck door opener according to the present invention.

FIG. 3 is a plan view of the lever member shown in FIG.

4 is a sectional view taken along the line AA of FIG.

5 is a cross-sectional view of essential parts showing a door open state of the video deck door opener shown in FIG. 1. FIG.

FIG. 6 is a sectional view of a main part of a conventional door opener for a video deck.

[Explanation of symbols]

 2 chassis 5 cassette door 10 lever member 14 tongue piece 16 boss

Claims (1)

(57) [Claims] 1. A lever member having a central portion pivotally supported by a chassis, one end engaged with a cam that rotates together with a drive gear, the other end engaged with a cassette door, and a biasing member for biasing the cassette door in a closing direction. A door opener in which the lever member is rotated in a counter-biasing direction by driving the drive gear to open the cassette door, and the biasing means includes a tongue piece extending to the lever member. A door boss for a video deck, the boss protruding from the chassis and engaging with a free end of the tongue.