JPS62167647A - Cassette discriminator - Google Patents

Abstract

PURPOSE:To attain subminiaturization of the titled device by providing a detection switch detecting the turning state while the detection switch side edge is energized by a spring so as to be turned in a direction so as to be approached to a main board having a tape reel base and fitted turnably to the main board. CONSTITUTION:When a tape cassette 1 (cassette holder 5) is turned clockwise and in the loading state, a projection 9a of a switch holder 9 is in contact with the bottom face 1c of the tape cassette and depressed, the switch holder 9 is turned clockwise and a detection pin 7 is inserted in a cassette discrimination hole 1a of the tape cassette 1. When the cassette holder 5 is turned while no tape cassette 1 is held, since the switch holder 9 is not turned, a tip 8a of the detection switch 8 is kept contacted with a cassette detection plate 13. Thus, the tip 8a of the detection switch 8 and the state of a cassette detection plate 13 are detected to detect the presence of the tape cassette 1, an independent cassette presence detection mechanism is omitted. Thus, subminiaturization is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cassette discriminating device for discriminating the type of tape cassette (recordable or non-recordable, tape type, etc.) in an apparatus using tape cassettes such as a video tape recorder. It's about configuration.

Conventional technology Conventionally, in magnetic recording and reproducing devices, etc., recording is possible on tape cassettes (to prevent accidental erasure), tape material (magnetic material)
As shown in FIG. 4, a cassette discrimination switch 2 is installed at a position corresponding to the cassette discrimination hole 1a provided on the bottom (back) surface 1C of the tape cassette 1 to detect the type of magnetic head and tape reel stand. (not shown), etc., is fixed to the main board 3. At this time, the tape cassette 1 is held by the cassette holder 5;
The cassette holder 6 has a rotation fulcrum 6 attached to the main board 3.
It is rotatably supported on the shaft.

With the above configuration, when the tape cassette 1 is mounted on the tape reel stand (not shown) as shown in FIG.
It detects the open/closed state of a, and determines whether recording is possible or not, the type of tape, etc.

Incidentally, the cassette identification hole 1a of the tape cassette 1 is usually provided near the corner of the tape cassette (for example, in tape cassettes for group 8 videos), and for reasons such as the overall design of the device and miniaturization of the device, As shown in the figure, it may be necessary to arrange the cassette discrimination switch 2 near the pivot point 6 of the cassette holder 6.

Problems to be Solved by the Invention In the conventional configuration described above, in order to smoothly insert the cassette discrimination switch 2 into the cassette discrimination hole 1a of the tape cassette 1, the pivot point 6 of the cassette holder 6 and the cassette discrimination switch 2 are connected to each other. must be placed at a certain interval H. Therefore, the pivot point 6 of the cassette holder 6 has to be located considerably below the lower end surface 1b of the chief cassette 1 (in the drawing). This has been a major hindrance to miniaturization of the device and the realization of a so-called cassette-sized device.

The present invention realizes an ultra-compact device by providing a configuration of a cassette discrimination device that allows the cassette discrimination switch to be smoothly inserted into the tape cassette discrimination hole regardless of the relative position of the rotational fulcrum of the cassette holder and the cassette discrimination switch. The purpose is to

Means for Solving the Problems In the configuration of the present invention, the cassette discrimination switch is rotated in conjunction with the rotation of the tape cassette during installation, and the cassette discrimination switch is operated without being influenced by the rotation locus of the cassette discrimination hole. A structure is provided for smoothly inserting the cassette discrimination switch into the cassette discrimination hole, and a structure is provided for detecting the rotating state of the cassette discrimination switch.

According to the present invention, the cassette discrimination switch can be inserted into the cassette discrimination hole during the tape cassette mounting operation, regardless of the mounting trajectory, so that the pivot point of the cassette holder that holds the tape cassette can be provided at any position. can.

Therefore, it is possible to realize ultra-miniaturization of the device, which has not been achieved due to the influence of the rotational fulcrum position of the conventional cassette holder.

Embodiment Below, the configuration of a cassette discriminating device according to an embodiment of the present invention will be explained.

FIG. 1 is a side view showing a state before mounting a tape cassette according to an embodiment of the present invention.

Reference numeral 9 denotes a switch holder, and one end thereof is provided with a detection pin 7 for detecting opening/closing of the first tape cassette discrimination hole 1a. This detection pin 7 is held slidably in its axial direction. One piece of the detection switch 8 is fixed to this detection pin, and is turned on and off in accordance with the sliding movement of the detection pin 7.

The nozzle holder 9 is rotatably attached to a rotation shaft 10 fixed to a main board 3 having a tape reel stand or the like (not shown), and is provided with a protrusion 9a at the other end. . Furthermore, the switch holder 9 is held in contact with a stopper 12 provided on the main board 3 while being biased counterclockwise by a spring 11.

FIG. 2 is a side view showing the state after the tape cassette 1 is installed. When the tape cassette 1 (cassette holder 5) rotates clockwise from the state shown in FIG. 1 and reaches the state shown in FIG.
When the switch holder 9 contacts and is pressed, the switch holder 9 also rotates clockwise to the state shown in FIG.
is inserted into the cassette discrimination hole 1a of the cassette. At this time, if the cassette discrimination hole 1& is not penetrated, the detection pin 7 slides and the detection switch 8 is turned on. If it is penetrated, the detection pin 7 does not slide and the detection switch 8 remains off. The cassette is discriminated (recordable/impossible, tape type, etc.).

Furthermore, 13 is a cassette presence detection plate of the tape cassette 1, which is in contact with the tip 8a of the detection switch 8 before the tape cassette is attached (FIG. 1). When the cassette holder 5 rotates while holding the tape cassette 1 as shown in FIG. As shown in the figure, when the cassette holder 5 rotates without holding the tape cassette 1, the tip 8a of the detection switch 8 contacts the cassette detection plate 13 because the switch holder 9 does not rotate. It will remain as it is. Therefore, by detecting the state (contact or non-contact) between the tip 8a of the detection switch 8 and the cassette detection plate 13, it is possible to detect the presence or absence of the tape cassette 1. This allows the detection mechanism to be omitted.

Effects of the Invention According to the present invention as described above, the detection pin can be smoothly inserted into the cassette discrimination hole to discriminate the cassette regardless of the rotation locus of the tape cassette, so the rotation fulcrum of the cassette holder can be set arbitrarily. As shown in the embodiment, the lower end of the main board can be made substantially flush with the lower end surface of the tape cassette. This makes it possible to make the entire device extremely compact to almost the same size as a tape cassette, and by integrating the cassette presence/absence detection mechanism, the mechanism can be simplified, which has great effects. It is something.

[Brief explanation of drawings]

FIG. 1 is a side view showing the state before the tape cassette is mounted in the embodiment of the present invention, FIG. 2 is a side view showing the state after the tape cassette is mounted in the embodiment, and FIG. 3 is the cassette holder in the embodiment. FIG. 4 is a side view showing the state before the conventional tape cassette is installed, and FIG. 6 is a side view showing the state after the conventional tape cassette is installed. 1...Tape cassette 1.7), 3...Main board, 5...Cassette holder, 6...
Rotation fulcrum of cassette holder, 7...detection pin,
8...detection switch, 9...switch holder, 1o...rotation shaft, 11...spring, 12...stopper, 13 ...Cassette presence/absence detection board. Name of agent: Patent attorney Toshio Nakao and 1 other person1-
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Claims (1)

[Claims] One end has at least one detection switch corresponding to a cassette discrimination hole provided on the back surface of the tape cassette, the other end has an engaging portion that engages with the back surface of the tape cassette when the tape cassette is installed, and the detection switch side A detection switch is rotatably attached to the main board with an end portion biased by a spring so as to rotate in a direction approaching the main board having a tape reel stand, etc., and detects the rotating state. A cassette discrimination device.