JPH0418092Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a cassette detection switch for a cassette loading device for loading a cassette, which normally has a locked front cover to protect the tape, into a device.
Specifically, the loading operation of the cassette loading device is started only when the cassette is inserted into a predetermined position and the front cover is unlocked.

BACKGROUND ART Conventionally, as shown in FIG. 4, a cassette detection switch of this type of cassette loading device has been used. There is provided a device in which the switch 3 is actuated by contacting the switch 3 to start the loading operation of the cassette loading device 2.

However, with the above configuration, the cassette detection switch 3 is configured to detect only a part of the cassette 1, so if the cassette 1 is not fully inserted or the cassette 1 is inserted at an angle, In some cases, the operation of the cassette loading device 2 was started while the front cover 4 of the cassette 1 was not unlocked and remained locked. in this way,
With the conventional switch mechanism, a malfunction in which the cassette 1 is loaded into the device without the cassette front cover 4 being opened is likely to occur, and in extreme cases, there is a problem that this may cause damage to the device body or the cassette.

In order to solve this problem, if the cassette front cover lock release mechanism and lock release detection mechanism are provided separately from the cassette detection switch mechanism, the structure will become complicated and the number of parts will increase, resulting in high costs. A problem arose.

Purpose of the invention The present invention has been made in view of the above problems, and uses a cassette detection switch mechanism to release the cassette front lid lock without separately providing a cassette front lid lock release mechanism and a lock release detection mechanism. In addition, only when both the insertion of the cassette and the unlocking of the cassette front cover are detected, the switch is turned on and the operation of the cassette loading device is started, thereby eliminating the above-mentioned malfunctions without increasing costs. It is something to prevent.

Structure of the invention In order to achieve the above-mentioned object, the present invention includes a cassette detection piece that detects the insertion of a cassette by coming into contact with a part of the cassette body to be inserted, and a front cover lock release knob provided on the cassette. and a release piece that releases the lock when the cassette is inserted into the predetermined position and the cassette front cover is unlocked. When the contacts come into contact with each other, the switch is turned on (ON), and the cassette loading device starts loading operation when the switch is conductive. This reliably prevents the locking from being started and eliminates the need for a separate cassette front cover lock release mechanism.

Embodiments Hereinafter, the present invention will be explained in detail with reference to embodiments shown in FIGS. 1 to 3.

In the figure, 10 is a cassette loading device, 11 is a cassette holder that is movably housed in the cassette loading device 10, and 12 is a switch installed near the cassette insertion opening 11a of the cassette holder 11. A release piece 13 for unlocking the cassette front cover 1a and a cassette detection piece 1
4, and when the contacts 20 and 21 provided on the release piece 13 and the cassette detection piece 14 come into contact, the switch 12 becomes conductive.

Reference numeral 15 denotes a drive gear rotatably attached to the outer surface of the frame of the cassette loading device 10, reference numeral 16 denotes an arm that engages integrally with or interlocks with the drive gear 15, and reference numeral 17 denotes a guide protruding from the outer surface of the cassette holder 11. The pin is a pin that is slidably passed through a guide groove 18 bored in the frame of the cassette loading device, and is inserted into the long groove 16a of the arm 16.
When the switch 12 is turned on,
The drive gear 15 is rotated in the direction of the arrow, and the cassette holder 1 is moved through the arm 16 and the guide pin 17.
1 is moved, and the cassette 1 held by the cassette holder 11 is loaded into a predetermined position within the cassette loading device 10.

As shown in FIG.
A contact piece support member 25 is fixed to the cassette 1, one end of which is supported by the contact piece support member 25, and the release piece 13 and the cassette detection piece 14 formed of an elastic body are attached to the cassette 1.
It is installed so as to protrude toward the insertion direction B side. Actuators 22 and 23 protruding toward the cassette 1 are fixed to the protruding ends of the release piece 13 and the cassette detection piece 14, respectively, and the contacts 20 and 21 are fixed to the respective intermediate portions facing each other. Further, the cassette detection piece 14 is arranged closer to the cassette 1 than the release piece 13, and the cassette detection piece 14
is slightly extended from the release piece 13 toward the side opposite to the insertion side, and the actuator 22 is inserted into the actuator 2.
The actuators 22 and 23 are located on the insertion side of the cassette 1, and the protruding ends of the actuators 22 and 23 toward the cassette 1 are set at substantially the same position.

In the cassette 1, at a position close to the front cover 1a,
Further, a front cover lock release knob 1b is provided on the switch 12 side. When the front lid lock release knob 1b is subjected to a pressing action, it retracts inward against the built-in biasing means to release the lock of the front lid 1a.

The operation of the above switch mechanism will be explained with reference to FIGS. 3A to 3D.

When the leading end of the cassette 1 inserted into the cassette holder 11 in the direction of arrow B is not yet in contact with both actuators 22 and 23, as shown in A, the contacts 20 and 21 are separated. When cassette 1 is further inserted into cassette holder 11, B
As shown in FIG.
2 is pressed, the release piece 13 is elastically deformed and retreated as shown, and the point 20 of the release piece 13 is further separated from the contact point 21 of the cassette detection piece 14. Even in this state, the actuator 22 of the release piece 13 still protrudes from the switch 12 toward the cassette 1 side.

Next, as shown in C, when the cassette 1 is further inserted, the actuator 23 of the cassette detection piece 14
is pressed against the cassette 1, and the cassette detection piece 14 retreats. At this time, the contact 21 of the cassette detection piece 14 approaches the contact 20 of the release piece 13, but since the contact 20 has also retreated, they do not come into contact with each other.

Further, when the cassette 1 is inserted and reaches a predetermined position on the cassette holder 11, the actuator 22 of the release piece 13 on the front side comes into contact with the lock release knob 1b, as shown in D, and the actuator 22 releases the lock release knob 1b. The cassette front cover 1a is unlocked by the pressing operation. Moreover, since the actuator 22 moves forward toward the cassette 1 side by the pressing operation, the release piece 13 also moves forward, and its contact point 20
also move forward. At this time, the actuator 23 of the cassette detection piece 14 remains in contact with the cassette 1.
Since the contact 21 is in the retracted position, it comes into contact with the contact 20 of the release piece 13. The contact between the contacts 20 and 21 brings the switch 12 into a conductive state, causing the cassette loading device 10 to start loading. That is, rotational driving of the drive gear 15 is started.

Effects As is clear from the above explanation, according to the switch mechanism according to the present invention, the switch that detects a cassette and starts the loading operation of the cassette loading device is connected to the cassette detection piece and the release for releasing the cassette front cover lock. and a cassette detection piece, and only when the contacts provided on the release piece and the cassette detection piece come into contact with each other,
Since the switch is made conductive to start the loading operation, the loading operation can be reliably started after the cassette front cover is unlocked. Therefore, the front cover of the cassette was not opened.
This eliminates malfunctions in which cassettes are loaded into the equipment, thereby preventing damage to the equipment and cassettes.

Furthermore, since there is no need to provide a lock release mechanism for unlocking the cassette front cover separately from the cassette detection switch, the structure can be simplified and the number of parts can be reduced, resulting in lower costs. It has various effects.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a cassette loading device showing an embodiment of the present invention, Fig. 2 is a front view of Fig. 1, Figs. FIG. 4 is a front view of a conventional cassette loading device. 1...Cassette, 1a...Cassette front cover, 1b
...Front cover lock release knob, 10...Cassette loading device, 11...Cassette holder, 12...Switch, 13...Release piece, 14...Cassette detection piece, 20, 21...Contact, 22, 23... ...actuator.

Claims (1)

[Scope of Claim for Utility Model Registration] In a cassette loading device that loads a cassette having a front cover for tape protection, a part of the inserted cassette comes into contact with a switch that starts the loading operation of the cassette loading device when electrical conduction occurs. A cassette detection piece and a release piece that comes into contact with the front cover lock release knob provided on the cassette to release the lock are provided, and only when the cassette is inserted into a predetermined position and the cassette front cover is unlocked. A cassette detection switch for a cassette loading device, characterized in that contacts provided on the detection piece and the release piece are in contact with each other to bring the switch into a conductive state.