JPH0612751A - Mechanism for opening/closing cassette door of video deck - Google Patents

Abstract

PURPOSE:To close a cassette door in a closing state flush with the front surface of a front panel without thickening the cassette door. CONSTITUTION:The cassette door 26 is supported by a door link 22, and the door link 22 is spring-energized and pivoted on the rear of the front panel 15 rotatably by a first supporting shaft 23 and in the direction of closing the cassette 26 with a first spring 30. The cassette door 26 is spring-energized and pivoted on the second supporting shaft 25 of the door link 22 rotatably and in an opposite direction to the spring energizing direction of the first spring 30 with a second spring 31. A tooth part 33 is provided on the first supporting shaft 23, and the door open/close link of a cassette loading mechanism is engaged with the tooth part 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette door opening / closing mechanism such as an 8 mm video deck.

[0002]

2. Description of the Related Art Conventionally, a cassette door of a front-loading cassette compartment (hereinafter referred to as "Casecon") in an 8-mm video deck is attached to the back side of a cassette insertion opening opened in a front panel of the Casecom, and a cassette is inserted by a lid opening / closing mechanism. It is configured to open and close the mouth.

[0003]

Since the cassette door thus constructed is a member to be placed in the cassette computer,
It cannot be flush with the front of the front panel on the front side of the cassette. For this reason, the opening edge portion of the cassette insertion opening of the front panel is exposed from the outside, so that the appearance is impaired in terms of design, and there is a problem that dust and the like are likely to be collected in the opening edge portion of the cassette insertion opening. It was

Further, as a measure for solving the above-mentioned problem, it is conceivable to increase the thickness of the cassette door so as to be flush with the front panel. However, in this case, the thickness of the cassette door causes an obstacle when the cassette is inserted. As a result, there is a problem in that the cassette door comes into contact with an operating part in the cassette computer and the cassette door malfunctions.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to make a closed cassette door flush with the front surface of the front panel without increasing the thickness of the cassette door. The purpose is to obtain a cassette door opening / closing mechanism for the deck.

[0006]

In order to achieve the above object, in the cassette door opening / closing mechanism of the video deck according to the present invention, the cassette holder reciprocates between the unloading position and the loading position by the rotation operation of the drive arm. In the cassette door opening / closing mechanism of the video deck, the door opening / closing link is rotated by a cam that rotates in conjunction with the rotation operation of the drive arm to open / close the cassette insertion opening on the front panel. The cassette door is supported by a door link, and the door link is supported on the rear surface of the front panel by a first supporting shaft so as to be rotatable and biased by a first spring member in the closing direction of the cassette door. The cassette door is rotatable on the second support shaft of the door link, and the second direction is opposite to the spring biasing direction of the first spring member.
Is urged by a spring member to be supported by a spring, a rotation transmitting portion is provided on the first support shaft, and the door opening / closing link is engaged with the rotation transmitting portion.

[0007]

The cassette door opening / closing mechanism of the VCR according to the present invention having the above-described structure is such that when the cassette is inserted into the cassette holder from the cassette insertion opening from the state where the cassette door closes the cassette insertion opening. Rotates around the first supporting shaft against the spring force of the first spring member to open the cassette insertion opening, the cassette is inserted into the cassette holder, and then the cassette holder rotates the drive arm. It moves to the loading position by the dynamic action. When the cassette passes through the cassette insertion opening, the cassette door is rotated by the spring force of the first spring member and closed in the same plane as the cassette insertion opening.

To eject the cassette, the cam of the drive arm rotates the door opening / closing link in association with the movement of the cassette holder to the unloading position by the rotation of the driving arm. The cassette door opens about the first support shaft against the spring force of the first spring member, and the cassette is ejected from the cassette insertion port. When the cassette is completely ejected from the cassette insertion opening, the cassette door is rotated by the spring force of the first spring member to close the cassette insertion opening.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a partially exploded perspective view of a cassette door side when the cassette door opening / closing mechanism of the present example is applied to an 8 mm video cassette computer, and FIG. 2 shows a perspective view of a cassette door and a front panel.

In FIG. 1, reference numeral 1 denotes a pair of left and right case computer side plates, and drive arms 2 are provided on both case computer side plates 1, 1.
Drive wheels 3, 3 having 2 are rotatably supported by shafts 4, 4. The two drive wheels 3 and 3 can be interlocked with the transmission wheels 6 and 6 supported by the transmission shaft 5, respectively, and one of the drive wheels 3 is rotationally driven by rotation of a motor (not shown) through a speed reduction mechanism. . In the guide shaft holes 2a and 2a of the two drive arms 2 and 2, shaft pins 8 and 8 projecting from the cassette holder 7 are supported through key-shaped guide grooves 9 and 9 formed in the cassette side plates 1 and 1, respectively. By rotating the shafts 3 and 3, the shaft pins 8 and 8 are moved along the guide grooves 9 and 9 so that the cassette holder 7 can be moved between the unloading position and the loading position. A cam 10 is provided on one of the drive wheels 3.

A fulcrum shaft 11a of a door opening / closing link 11 is rotatably supported by a side lid (not shown) at a position corresponding to the cam 10 of the drive wheel 3 described above. This door opening and closing link 11
Has a tooth portion 12 at the tip end and a cam follower 13 at the base end which engages with the cam 10, and the link 11 has a coil spring 14
Is urged in the direction of the arrow.

In FIG. 2, reference numeral 15 is a front panel, and a mounting piece 17 is fixed to an upper chassis 16 by a screw 18 in front of the cassette computer. The front panel 15 is formed with a cassette insertion opening 20 into which an unillustrated 8 mm tape cassette (hereinafter referred to as a cassette) is inserted and ejected, and the cassette side plates 1 and 1 corresponding to the cassette insertion opening 20 are formed. Cassette door positioning ribs 1a, 1a are provided at the front end. Cassette insertion slot 2
0 has ribs 20a, 20a on the left and right portions of the back surface, and locking portions 21, 21 with which a cassette door described later is engaged are formed on the lower portion of the back surface.

A first support shaft 23 having a pair of door links 22 and 22 is rotatably supported by bearing plates 24 and 24 on the upper back surface of the front panel 15 described above, and the door links 22 and 22 are provided. A cassette door 26 is swingably supported by each of the second support shafts 25 provided on the. The cassette door 26 closes the cassette insertion port 20 on the same plane as the front surface of the front panel 15.

On the other hand, the cassette door 26 has such a size that a slight gap is formed around the cassette insertion opening 20 when the cassette insertion opening 20 is closed, and the second support shaft 25 of the door link 22 described above. On the other hand, there is some play in the axial direction. Further, the cassette door 26 has upper and lower edges formed on the tapered surfaces 26a, 26a, and a locking piece 27 which engages with the locking portion 21 of the cassette insertion port 20 described above at the lower edge, and an upper portion. A rib 27a that engages with the upper opening edge of the cassette insertion port 20 is provided at the edge portion. Further, as shown in FIG.
A positioning piece 28 having a slope 28a on the front surface as shown in FIG.
And the inclined surfaces 29, 29 (see FIG.
(See) is formed.

In the cassette door 26 having the above-mentioned structure, the cassette door 26 supported by the first spring 30 inserted into the first support shaft 23 via the door link 22 is in the closing direction of the cassette insertion port 20. The spring is biased. Also,
The cassette door 26 is biased by a second spring 31 inserted into the second support shaft 25 in a direction opposite to the biasing direction of the first spring 30 described above. Further, the door link 22 is formed with a stopper piece 32 for restricting the rotation range of the cassette door 26 by the second spring 31. This second spring 31
Is set to be smaller than the spring force of the first spring 30, the cassette door 26 maintains the cassette insertion port 20 in the closed state.

A tooth portion 33 serving as a rotation transmitting portion is fixed to one end of the first support shaft 23. The tooth portion 33 meshes with the tooth portion 12 of the door opening / closing link 11 described above, and can transmit the turning force of the door opening / closing link 11 to the first support shaft 23. The pivot range of the door opening / closing link 11 is approximately 18
And the tooth portion 33 rotates by approximately 90 °.
Further, the door opening / closing link 11 is capable of overstroke over the rotation range of 18 °.

The cassette door opening / closing mechanism configured as described above is installed on the upper chassis 16 of the cassette computer to the front panel 15.
When mounting using the mounting piece 17, the position of the upper chassis 16 and the front panel 15 is actually misaligned, and the cassette door 26 abuts the cassette positioning rib 1a of the cassette side plate 1 and the cassette door 26 It may be difficult to open 26. However, in the case of the configuration of the present invention, when the cassette door 26 is opened, the cassette door 2
When the inclined surface 29 of 6 comes into contact with the cassette door positioning rib 1a, the inclined surface 29 slides and the cassette door 26 can be displaced with respect to the cassette door positioning rib 1a.
As a result, the cassette door 26 becomes the cassette door positioning rib 1.
It can be opened into the case computer without being disturbed by a.

Further, when the cassette door 26 is closed, even if the cassette door 26 is displaced with respect to the cassette insertion port 20, the slanted surface 28a of the positioning piece 28 causes the displacement of the cassette door 26 in the left-right direction. It is possible to slide the rib 20a of 20 to position the cassette door 26 at the central portion of the cassette insertion port 20, and thereby the closed position of the cassette door 26 with respect to the cassette insertion port 20 can be set to an appropriate position.

Next, the operation of the above cassette door opening / closing mechanism will be described with reference to FIGS. Incidentally, in a series of operations, reference numeral C indicates a cassette which is inserted into the cassette holder to be loaded and unloaded, and the cassette holder is omitted. FIG. 4 shows an unloading state of the cassette door opening / closing mechanism, that is, a cassette insertion standby state. In this state, the door opening / closing link 11 is rotated counterclockwise about the fulcrum shaft 11a by the compression spring force of the coil spring 14. Therefore, the tooth portion 3 fixed to the first support shaft 23 that meshes with the tooth portion 12 of the door opening / closing link 11
3 is rotated in the clockwise direction, and therefore, via the door link 22 supported by the first support shaft 23, and further the second support shaft 2
The cassette door 26 supported by 5 is urged to rotate in the clockwise direction to close the cassette insertion opening 20 with the cassette door 26 flush with the front surface of the front panel 15.

When the cassette C is inserted by pushing the cassette door 26 from the state shown in FIG. 4, the cassette door 26 is moved to the first position.
With the support shaft 23 as a fulcrum of rotation, it rotates counterclockwise and rotates into the cassette computer. At this time, the door opening / closing link 11 meshing with the tooth portion 33 fixed to the first support shaft 23 rotates clockwise against the spring force of the coil spring 14. Thus, the cassette door 26 comes into a horizontal state as shown in FIG. 5 and comes into contact with the upper surface of the cassette C, so that the cassette C is inserted into the cassette holder (not shown).

When the cassette C is completely inserted into the cassette holder, the drive wheels 3 are rotationally driven by a motor (not shown), and the drive arm 2 is rotated clockwise to load the cassette C as shown in FIG. Move to the state. During this time, since the door opening / closing link 11 is in the overstroke state, the cam 10 of the drive wheel 3 does not contact the cam follower 13 of the door opening / closing link 11 (see FIG. 5). Further, in the above-described operation, when the rear end of the cassette C passes through the cassette door 26, the compression spring force of the coil spring 14 causes the door opening / closing link 11 to rotate in the counterclockwise direction and mesh with the tooth portion 12 thereof. And the first support shaft 23
The cassette door 26 is rotated in the clockwise direction together with the door link 22 to close the cassette insertion opening 20.

On the other hand, in the operation of the cassette C from the loading state to the unloading state, the motor (not shown) rotationally drives the drive wheel 3 from the state of FIG. 6 to rotate the drive arm 2 in the counterclockwise direction to move the cassette C. Move to unloading state. During this unloading operation, FIG.
As shown in FIG. 3, the cam 10 of the drive wheel 3 abuts on the cam follower 13 of the door opening / closing link 11 to rotate the door opening / closing link 11 in the clockwise direction, so that the teeth portion 33 of the door opening / closing link 11 meshes with the teeth portion 33. Then, the cassette door 26 is rotated counterclockwise together with the door link 22 with the first support shaft 23 as the center of rotation to open the cassette insertion port 20. This cassette door 2
6, the cassette door 26 is rotated counterclockwise by the spring force of the second spring 31 attached to the second support shaft 25 of the door link 22, and is regulated by the stopper piece 32 of the door link 22. Stop in a tilted state.

Subsequently, when the cassette door 26 is opened, the driving arm 2 is rotated to move the unloading cassette C in the ejecting direction. here,
When the cassette C approaches the cassette door 26 in the open state, the rear end of the cassette C abuts the cassette door 26 in the inclined state and the cassette door 26 is pushed up to be in the overstroke state. Therefore, while the cassette C is ejecting the cassette insertion port 20, the cassette door 26 contacts the upper surface of the cassette C in a horizontal state. At this time, the door opening / closing link 11 that meshes with the tooth portion 33 via the door link 22 is also in the overstroke state, so that the cam 10 of the drive wheel 3 that ejects the cassette C contacts the cam follower 13 of the door opening / closing link 11. Without passing through the cam 10.

Thus, from the cassette door 26 to the cassette C
When the door opening / closing link 11 is discharged, the door opening / closing link 11 is rotated counterclockwise by the spring force of the coil spring 14, so that the tooth portion 1
The cassette door 26 is rotated in the clockwise direction together with the door link 22 via the tooth portion 33 and the first support shaft 23 that are meshed with 2 to close the cassette insertion opening 20, and a series of operations is completed.

The present invention utilizes the door opening / closing link 11 of the cassette loading mechanism as described above, and the cassette door 2 via the door link 22 interlocking with the door opening / closing link 11.
6 is opened and closed, and particularly when the cassette door 26 is closed, it can be closed in the same plane as the front surface of the front panel 15, so that the appearance of the VCR can be improved and the degree of freedom in design can be improved. Cassette insertion slot 2
No dust or the like will be collected at the opening edge of 0. Further, when the cassette door 26 is opened, it can be accommodated in the space inside the cassette computer without taking up a space, so that the VCR can be made thinner.

The present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention. For example, the cassette door opening / closing mechanism of the present invention is suitable for being applied to the door opening / closing mechanism of an 8 mm video deck, but is also widely applicable to the door opening / closing mechanism of other cassettes.

[0027]

As described above, in the cassette door opening / closing mechanism of the video deck according to the present invention, the rotation movement of the drive arm causes the cassette holder to reciprocate between the unloading position and the loading position, thereby rotating the drive arm. In the cassette door opening / closing mechanism of the VCR, which opens and closes the cassette insertion opening on the front panel by rotating the door opening / closing link with a cam that rotates in conjunction with the cassette door, the cassette door is supported by the door link. And
The door link is supported on the rear surface of the front panel by a first support shaft and is supported by being spring-biased by a first spring member in the closing direction of the cassette door, and the cassette door is supported by a second support shaft of the door link. The first spring member is rotatably supported by being urged by the second spring member in a direction opposite to the spring urging direction of the first spring member and provided with a rotation transmitting portion on the first support shaft. Since the door opening and closing link is engaged with the section, the closed cassette door can be closed in the same plane as the front surface of the front panel, which improves the appearance of the VCR and improves design freedom. The degree of improvement can be improved, and dust and the like will not be collected on the opening edge of the cassette insertion port. Further, when the cassette door is opened, it can be accommodated in the space inside the cassette computer without taking up space, so that the VCR can be made thinner.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a cassette door opening / closing mechanism in the present embodiment on a cassette computer side.

FIG. 2 is a perspective view of a front panel and a cassette door of the cassette door opening / closing mechanism in this example.

FIG. 3 is a partial perspective view of the cassette door as viewed from the front side.

FIG. 4 is a sectional view of the cassette door opening / closing mechanism before the cassette is inserted.

FIG. 5 is a sectional view of the cassette door opening / closing mechanism when the cassette is inserted.

FIG. 6 is a cross-sectional view of the cassette door opening / closing mechanism during cassette loading.

FIG. 7 is a sectional view of the cassette door opening / closing mechanism when the cassette is ejected.

[Explanation of symbols]

 1 Casecon side plate 1a Cassette door positioning rib 2 Drive arm 3 Drive wheel 6 Transmission wheel 7 Cassette holder 10 Cam 11 Door opening / closing link 13 Cam follower 15 Front panel 20 Cassette insertion port 22 Door link 23 First support shaft 25 Second support Axis 26 Cassette door 28 Positioning piece 28a Slope 29 Slope 30 First spring 31 Second spring 32 Stopper piece 33 Teeth

Claims (2)

[Claims] 1. A door holder opening / closing link is rotated by a cam which is reciprocally moved between an unloading position and a loading position by a rotation operation of a drive arm, and is rotated in association with a rotation operation of the drive arm. In a cassette door opening / closing mechanism for a VCR in which a cassette door is opened / closed at a cassette insertion opening on the front panel, the cassette door is supported by a door link, and the door link is provided on the back surface of the front panel. Is rotatably supported by the first supporting member and is urged by the first spring member in the closing direction of the cassette door, and the cassette door is rotatable and supported by the second supporting shaft of the door link. The spring member is supported by being spring-biased by a second spring member in a direction opposite to the spring-biasing direction of the spring member, and a rotation transmitting portion is provided on the first support shaft. A cassette door opening / closing mechanism for a video deck, characterized in that the cassette opening / closing link is engaged with the door opening / closing link, and the cassette door is flush with the front surface of the front panel to close the cassette insertion opening. 2. A cassette door opening / closing mechanism for a video deck according to claim 1, wherein said door link is provided with a stopper piece for restricting a rotation range of said cassette door by said second spring member.