JPH0535457Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention is a tape recorder that detects a detection hole provided in a tape cassette in order to detect characteristics of the cassette tape, such as whether recording (erasing) is possible or not. This invention relates to a cassette detection device.

[Technical background of the invention]

In conventional cassette-type tape recorders, the distinction between general use and music-only tapes (for example, chrome tapes, etc.) is determined based on the characteristics of the cassette tape using a detection arm and a switch for the detection hole in the recorder characteristics display. In order to prevent erroneous recording (erroneous erasure), a detection hole is provided by cutting off the erroneous erasure prevention claw provided on the tape cassette, and the detection arm and switch are configured to detect the presence or absence of this detection hole. .

As a typical detection device, the configuration shown in FIG. 3 has been known. In FIG. 3, 1 is a chassis of a tape recorder, and this chassis 1
A pair of arm mounting portions 2 for pivotally supporting a shaft 3 are implanted in the shaft. A detection arm 4 is rotatable around the shaft 3, and has a hole detection section 4a at one end and a switch pressing section at the other end. Reference numeral 5 designates a micro switch, which is attached to the chassis 1, supported by a mounting plate 6, and provided with an actuator 5a that comes into contact with the switch pressing portion 4b of the detection arm 4. Reference numeral 7 designates a cassette half set in a mounting portion (not shown) of a tape recorder, and has a detection hole 7a in its side surface.

Next, the operation will be explained.

First, when the tape cassette 7 without the detection hole 7a is set, the hole detection part 4a of the detection arm 4
is moved upward by the cassette half 7,
As a result, the detection arm 4 rotates counterclockwise using the shaft 3 as a fulcrum, and the switch pressing part 4b comes into contact with the actuator 5a of the micro switch 5, moving the actuator 5a downward, and the micro switch 5 is switched to perform various operations. It is possible to perform detection with the following functions.

Next, when the tape cassette 7 of the detection hole 7a is set, the hole detection part 4a of the detection arm 4
enters the detection hole 7a of the tape cassette 7, and the switch pressing portion 4b of the detection arm 4 is separated from the actuator 5a of the microswitch 5, so the microswitch 5 is not operated.

[Problems with background technology]

However, since the conventional detection device described above is configured as described above, an actuator is required in the microswitch in order to absorb the overstroke of the detection arm, and if the actuator is not required, An alternative return spring is required, and in either case, the disadvantage is that the structure becomes more complicated and the device becomes larger due to an increase in the number of parts.

[Purpose of invention]

This invention was made to eliminate the above-mentioned conventional drawbacks, and without the need for special separate parts.
It is an object of the present invention to provide a detection device that can use a low-cost switch (for example, a tact switch) that cannot absorb overstroke.

[Summary of the idea]

The cassette detection device of this invention is a cassette detection device that detects a detection hole formed on the side surface of a tape cassette, and includes a detection switch attached to a chassis, one end of which can be brought into contact with the detection switch, and a resin material. It consists of a switch pressing part formed into a substantially U-shape and having flexibility, and a hole detection part whose other end can come into contact with the detection hole of the tape cassette,
The detection arm is attached to the chassis and is rotatable.

[Example of idea]

Embodiments of the cassette detection device of this invention will be described below with reference to the drawings.

FIGS. 1 and 2 are side views showing the configuration of one embodiment. In FIG. 1 and FIG. 2, in order to avoid duplicate explanation, the same parts as in FIG.
We will focus on the parts that differ from Figure 3.

As is clear from comparing FIGS. 1 and 2 with FIG. 3, the parts indicated by numerals 1 to 3, 7, and 7a are the same as the configuration in FIG. In Figure 2, the detection arm 40 and switch 50 are different.

That is, the detection arm 40 is approximately U-shaped, and a flexible (elastic) switch pressing portion 40b provided at one end thereof and a hole detection portion 40a provided at the other end are integrally molded with resin. It is set in. A tact switch 50 is provided on the chassis 1 and is brought into contact with the switch pressing portion 40b of the detection arm 40.

Next, the operation of the cassette detection device of this invention constructed as described above will be explained.

First, in FIG. 1, when the cassette half 7 having the detection hole 7a is set, the detection arm 40
The hole detection part 40a is the detection hole 7 of the cassette half 7.
a and a detection arm 40 provided at the other end.
The switch pressing portion 40b does not operate the tact switch 50.

Next, in FIG. 3, when the cassette half 7 without the detection hole 7a is inserted into the cassette, the hole detection part 40a pushed up by the cassette half 7 is inserted into the shaft 3.
Rotate the detection arm counterclockwise using the
The flexible switch finger pressure part 40b presses the tact switch 50 to operate the tact switch 50. In this case, the overstroke is absorbed by the bending of the switch pressing portion 40b.

In the above-mentioned embodiments, the detection of the detection hole provided in the cassette half was explained, but the cassette detection device according to this invention also detects the presence or absence of the cassette half itself to determine whether it is set or not. It can be configured similarly as a detection device.

[Effect of idea]

As described above, according to the tape recorder cassette detection device of this invention, since the detection arm is formed of a resin material into a substantially U-shape and is composed of a flexible switch pressing portion, it is possible to use a single member. By providing only a special elastic member such as a coil spring, a low-cost switch such as a tact switch that cannot absorb overstroke can be used without significantly increasing the space of the device. can do.

[Brief explanation of the drawing]

1 and 2 are side views showing the first and second states of an embodiment of the cassette detecting device according to this invention, and FIG. 3 is a side view showing the configuration of a conventional cassette detecting device. 1... Chassis, 2... Arm mounting part, 3...
Shaft, 7...Cassette half, 7a...Detection hole, 4
0...detection arm, 40a...hole detection section, 40b
...Switch pressing part.

Claims (1)

[Claims for Utility Model Registration] A cassette detection device that detects a detection hole formed in the side surface of a tape cassette 7, which includes a detection switch 50 attached to the chassis 1.
and one end can be brought into contact with the detection switch 50,
It consists of a flexible switch pressing part 40b formed of a resin material into a substantially U-shape, and a hole detection part 40a whose other end can come into contact with the detection hole of the tape cassette 7, and is attached to the chassis 1. A cassette detection device for a tape recorder, comprising a detection arm 40 which is rotatable along with the detection arm 40.