JPH04105844U - Cassette loading device - Google Patents

Abstract

(57) [Summary] [Purpose] To eliminate concerns about fingers getting caught in the cassette door when ejecting a cassette or damage to the front loading device due to double insertion of cassettes. [Structure] In a magnetic recording/reproducing device having a front loading mechanism 1 , the spring 5 is normally biased in one direction to a predetermined closed position, and when a cassette is inserted, it is opened against the spring 5 and the cassette A cassette door 4 that is opened by a lever 10 during ejection, a detection means 16 comprising a reed switch 8 that detects the predetermined position of the cassette door 4, and a magnet 6 that is linked to the movement of the cassette door 4; A control circuit 17 operated by the detection signal of the detection means 16
A cassette loading device consisting of.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a front-row device for magnetic recording and reproducing devices such as video tape recorders. The present invention relates to a printing device.

0002

[Conventional technology]

This type of front loading device does not allow children to remove the cassette from the cassette. If you insert your hand into the set insertion slot and your finger gets caught between the cassette door and the cassette, To prevent the above-mentioned accident, the cassette door is locked so that it cannot be opened when the cassette is installed. Some are equipped with a mechanism (for example, see Utility Model Application No. 186593/1983 G11B 33/02).

0003

[Problem that the idea aims to solve]

If the cassette door is equipped with a locking mechanism, it will not know when the cassette is inserted. If you try to insert another cassette without inserting it or forget it, the cassette Otherwise, the front loading mechanism may be damaged.

0004

[Means to solve the problem]

In a magnetic recording/reproducing device with a front-loading mechanism, one-way operation is always performed. When the cassette is inserted, it opens against the spring. There is a cassette door that is opened by a lever when ejecting a cassette, and a cassette door. a detection means composed of a reed switch and a magnet for detecting the predetermined position of the and a control circuit operated by the detection signal of the detection means, and the control circuit is operated by the detection signal of the detection means. The control circuit was activated.

[0005]

[Effect]

When ejecting a cassette, if the cassette door is in the closed position, the eject By operating the detection means, the control circuit works and the cassette is moved smoothly. is discharged.

[0006]

【Example】

A specific embodiment of the present invention will be described below. FIG. 1 is a partially exploded perspective view of the main parts, and FIG. 2 is a circuit block diagram thereof. In the figure, the front loading mechanism 1 has the pivot shafts 4a, 4b of the cassette door 4 inserted into the through holes 2a, 3a of the left and right side plates 2, 3, so that it can freely rotate and is always biased in one direction via a coil spring 5. is in a predetermined closed position.

[0007] A lever 7 to which a magnet 6 is attached is fixed to the support shaft 4a, and the lever 7 It rotates together with the cassette door 4. A board on which a reed switch 8 is installed on the side plate 2 9 is mounted opposite to the cassette door 4 at a predetermined position. 10 is the cassette door 4 This is a lever that rotates against the spring 5, and is driven by a loading motor (not shown). It is driven via gears 11, 12, etc. Holder 13 is used to rotate the loading motor. It is driven via gears 11, 12, 14, etc.

Next, the operation of the present invention will be explained. When loading a cassette, open the door 4 against the spring 5 with the cassette and place the cassette on the holder 13, the loading motor will rotate and move the cassette to the tape loading position via gears 11, 12, 14, etc. let When performing normal cassette ejection from this state, when the cassette eject button 15 shown in FIG. The magnet 6 constituting the position detection means 16 faces the reed switch 8, and the reed switch 8 is turned on and sends an eject operation signal to the mechanism control circuit 17. In response to this, an eject instruction signal is output from the control circuit 17, and the loading motor rotates to move the holder 13 via gears 11, 12, 14, etc., and the cassette is ejected.

[0009] On the other hand, rotate the cassette door 4 slightly using the cassette or your fingers. Then, the lever 7 also rotates, and the magnet 6 moves away from the reed switch 8. Then, the reed switch 8 becomes OFF. In this state, press eject button 15. Even if the control circuit 17 is operated, the control circuit 17 does not operate. Therefore, the cassette is not ejected.

0010

[Effect of the idea]

As mentioned above, the present invention has a simple structure of simply attaching a switch to the cassette door. This eliminates concerns such as fingers getting jammed when ejecting the cassette.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of main parts showing a specific embodiment of the present invention.

FIG. 2 is a circuit block diagram of the present invention.

[Explanation of symbols] 1 Front loading mechanism 4 Cassette door 5 Coil spring 6 Magnet 8 Reed switch 10 Lever 16 Detection means 17 Control circuit

Claims (2)

[Scope of utility model registration request] 1. In a magnetic recording and reproducing device having a front loading mechanism, the magnetic recording and reproducing device is normally in a predetermined closed position with a spring biased in one direction, is opened against the spring when a cassette is inserted, and is opened against the spring when a cassette is ejected. A cassette mounting device comprising: a cassette door opened by a lever; a detection means for detecting the predetermined position of the cassette door; and a control circuit operated by a detection signal from the detection means. 2. The cassette mounting device according to claim 1, wherein the detection means is a reed switch disposed opposite to the predetermined position of the cassette door, and a magnet that is interlocked with movement of the cassette door. .