JPS626623Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a door drive device for driving a door that is freely openable and closable at a loading port of a compact disc player, a video disc player, or the like.

2. Description of the Related Art Conventionally, there is a door drive device shown in FIG. 1, for example, for driving a door that is freely openable and closable at a loading port of a disk such as a compact disk player or a video disk player. That is, the coil spring 7 wound around the outer periphery of the operating rod 1A
When the push button 5 is pushed in against the spring bias, the actuating rod 1A of the push button 5 causes the shaft 10 to
The intermediate transmission member 9, which is pivotally supported by By activating the tip side of the tension spring 15 against the elastic force, the protrusion 11A ₁ provided at the tip of the cam arm 11 is activated.
is released from the locking portion 14 of the door 1.
Then, the door 1 is rotated and opened using the pivoting part 3 as a fulcrum by the spring bias of the coiled spring 4 etc. wound around the pivoting part 3, and when the door 1 is closed, it is pushed closed by hand. Protrusion 11 of cam arm 11
_A1 is engaged with the locking part 14 of the door 1, and the door 1 is opened and closed.

However, the door driving device in the conventional information recording and reproducing apparatus described above has a structure in which the door 1 is opened by pressing the push button 5.
If the operating stroke of is shortened, force is required to drive various members such as the intermediate transmission member 9 and the cam arm 11. Further, in order to press the push button 5 easily, the operating stroke of the push button 5 needs to be long to some extent.

Further, although not shown in the drawings, an electric door driving device that opens and closes the door using the driving force of a motor or the like has a drawback that the door cannot be opened when the power is turned off or there is a power outage.

The present invention was developed in view of the above points, and its purpose is to enable the door to be opened easily by using electrical means,
Another object of the present invention is to provide a door drive device for an information recording/reproducing device with extremely high safety, which allows the door to be opened and closed manually during a power outage or when power is not supplied.

An embodiment of the present invention will be described below with reference to FIG.

Note that the same parts as in the conventional example shown in FIG. 1 are indicated by the same reference numerals in each figure.

Reference numeral 1 designates a door that can be opened and closed with respect to the disk loading opening 2 by the biasing of a coiled spring 4 or the like wound around the outer periphery of the pivot portion 3 .

5 is a push button attached to the door 1 so as to be pushed freely against the spring force of a coil spring 5 etc. wound around the outer periphery of the operating rod 1A; 6 is a push button that is activated when the push button 5 is pushed; This is a guide plate for guiding the rod 1A so that it can be pushed freely in the axial direction without play. _1A1 is a projection provided at the bottom of the push button 5, which engages the micro switch 8 and turns on when the push button 5 is pushed to the intermediate position against the spring bias of the coil spring 7. It is for the purpose of

Reference numeral 9 denotes an intermediate transmission member which is pressed when the push button 5 is pushed to the frontmost position and is rotatable around the shaft portion 10; 11 is an intermediate transmission member attached to the intermediate portion so as to be rotatable around the shaft portion 12; This cam arm 11 is a cam arm, and when the push button 5 is pushed to the frontmost position during a power outage or de-energization, the end portion 11B of the cam arm 11 is pushed down by the intermediate transmission member 9, and the tip portion 11A side is lifted. In addition, when the push button 5 is normally pushed to the intermediate position, such as when energizing, the micro switch 8 is turned on and the plunger 13 is energized, so that the distal end 11B is depressed and the tip 11A is turned on. The sides are lifted.

_11A1 is an engagement protrusion provided at the lower end of the cam arm 11, and when this protrusion _11A1 is disengaged from the locking portion 14 provided on the back surface of the door 1, the door 1 is rotated. be opened.
Reference numeral 15 is a tension spring that tensions the tip end side of the cam arm 11, and reference numeral 16 is a power source.

One embodiment of the present invention has the above-described configuration, and opening the door 1 when electricity is applied is performed as follows. First, when the push button 5 is pushed to the intermediate position against the elastic force of the coil spring 7, the micro switch 8 is turned on by the protrusion _1A1 provided at the bottom of the push button 5, and the solenoid of the plunger 13 is energized. The distal end 11 of the cam arm 11 is
Since B is indexed against the tensile force of the tension spring 15, the tip portion 11A side is lifted. Therefore, the protrusion _11A1 provided at the tip of the cam arm 11 is the locking portion 1.
Since the engagement from spring 4 is released, door 1 is released from coil spring 4.
It opens under the force of a spring. In this way, the cassette half can be loaded into the disk loading port 2.

To close door 1, press door 1 with your hand.
Since the protrusion 11A1 provided at the tip of the cam arm ₁₁ engages with the locking portion 14, the door 1 is closed.

To open the door 1 during a power outage or de-energization, push the push button 5 to the frontmost position against the elastic force of the coil spring 7. At the tip of the push button 5, the intermediate transmission member 9 engages the shaft 10. By being rotated around the center, the distal end 11B side of the cam arm 11 is pushed down, the distal end 11A side is lifted up against the tensile force of the tension spring 15, and the projection _11A1 is disengaged from the locking part 14. be done. Therefore, door 1 has coil spring 4
It opens under the force of a spring. When closing the door 1, the door 1 is manually pushed, and the protrusion _11A1 provided at the tip of the cam arm 11 engages with the locking portion 14, so that the door 1 is closed.

In the above embodiment, the door 1 is opened by rotating the cam arm 11 using a micro switch or solenoid so that the protrusion _11A1 provided at the tip of the cam arm disengages from the locking part 14. However, the door 1 may be opened and closed by operating the cam arm 11 by a movable member such as a cam or a gear, or by the driving force of a motor using an optical sensor or a magnetic sensor.

As mentioned above, the present invention allows the door to be opened easily by using a combination of electrical and mechanical means by simply adjusting the push amount of the push button between the intermediate position and the frontmost position. High safety is achieved as the door can be opened and closed manually during power outages or when the power is off.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a door driving device in a conventional information recording/reproducing apparatus, and FIG. 2 is a sectional view showing an embodiment of the door driving device in an information recording/reproducing apparatus according to the present invention. DESCRIPTION OF SYMBOLS 1...door, 1A...operating rod, 2...disk loading port, 3...pivot part, 4...coiled spring, 5...push button, 8...micro switch, 9...intermediate transmission member, 11...Cam arm, 11A ₁ ...Protrusion, 13...Plunger, 14...Locking part.

Claims (1)

[Scope of utility model registration request] A door that can be opened and closed under the force of a coiled spring, a push button that is arranged to be pushed in against the force of the spring and provided with an operating rod, and a pushing force generated by pushing the push button in its most forward position. an intermediate transmission member that is rotated by the intermediate transmission member; a plunger that is energized via a switch that is turned on and off by pushing the push button in an intermediate position; and a cam arm that releases engagement from the locking portion when rotated by pressing down of the intermediate rotating member.