JPH0441468Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Application Field] This invention relates to a cassette tape recorder, and in particular to a structure that displays the length of the magnetic tape stored in the cassette case (i.e., the usable time of the tape cassette). be. [Prior Art] A tape cassette has a magnetic tape stored in a cassette case, and the usable time of the tape cassette is determined by the space defined by the cassette size of the cassette case and the magnetic tape thickness. It corresponds to the tape length. For example, cassette sizes S (small), M (medium), L
There are three types (large), and the tape thickness is
If there are two types, 16 μm and 13 μm, A, B, C, D, E, F as shown in Table 1 below.
There are six different tape lengths of magnetic tape. In other words, there are tape cassettes with six types of usable time.

[Problem that the invention attempts to solve]

It is impossible to determine the tape length of a plurality of types of tape cassettes based only on information about the cassette size. Also, even if the tape length and usable time are displayed on the outside of the cassette case, once you
Once a tape cassette is stored in a cassette tape recorder that is compatible with multiple types of tape cassettes, it becomes impossible to determine the tape length and usable time from the outside. Such problems may cause the operator to make erroneous operations. Therefore, it is an object of this invention to provide a cassette tape recorder that accurately displays the tape lengths of a plurality of types of tape cassettes and allows the operator to easily know the tape lengths. [Means for solving the problem] This invention enables the use of tape cassettes of multiple cassette sizes, and also allows the use of magnetic tapes with multiple thicknesses stored in cassette cases of multiple cassette sizes. In a tape recorder capable of using a certain tape cassette, a cassette size detection means 1 provided in association with the cassette storage section, tape thickness identification means 4 and 16 provided in connection with the cassette case, and a cassette size detection means 1 provided in connection with the cassette case, The cassette tape recorder is equipped with decoders 3 and 6 which decode the output signal of the size detection means 1 and the output signals of the tape thickness identification means 4 and 16 to generate an output signal indicating the tape length. [Function] A sensor is provided in the cassette tape recorder as the cassette size detection means 1, a recess for tape thickness information is provided in the cassette case as the tape thickness identification means 4, 16, and a sensor for identifying the presence or absence of the tape thickness is provided in the cassette tape recorder. The type of tape cassette is determined based on the output from each sensor, and the tape length (usable time) corresponding to the determined type of tape cassette is displayed on the display unit 1.
Displayed at 9. [Example] Hereinafter, this invention will be explained using two types of magnetic tape thickness and three cassette sizes of the cassette case that stores the magnetic tape: S (small), M (medium), and L (large).
An embodiment applied to a cassette tape recorder that can accommodate tape cassettes having six types of tape lengths, A, B, C, D, E, and F types will be described with reference to the drawings. In FIG. 1, numeral 1 denotes a sensor for detecting the cassette size, which is composed of, for example, six optical detection means. The output of sensor 1 is output to amplifier 8.
The data is supplied to the detection circuit 2 via the detection circuit 2, converted into digital data in the detection circuit 2, and the cassette size data corresponding to the type of cassette size is sent to the CPU 3.
is supplied to Further, 4 is a sensor for identifying tape thickness,
For example, a micro switch or the like is used. The output of the sensor 4 is supplied to a detection circuit 5 via an amplifier 9, converted into digital data in the detection circuit 5, and tape thickness data corresponding to the type of tape thickness is supplied to the CPU 3. 6 is a ROM, and this ROM 6 stores tape cassette data corresponding to six types of tape cassettes. An address consisting of cassette size data and tape thickness data is supplied from the CPU 3 to the ROM 6. By this,
Tape cassette data indicating the tape length is successively outputted from the ROM 6 and supplied to the CPU 3. The cassette tape data is supplied from the CPU 3 to the display circuit 7, and the tape cassette data is made into a display signal in the display circuit 7. This display signal is supplied to the display section 19, and the tape length corresponding to the display signal is displayed. Further, the CPU 3 generates a control signal for controlling the position of the reel hub shaft so as to correspond to the position of the reel hub of the tape cassette of each size, and supplies this control signal to the plunger of the mechanism section. FIG. 2 is a top view of the storage section of the cassette tape recorder in one embodiment of this invention. The S size tape cassette is stored in the storage position 11 shown by the dashed line in FIG. 2, and the M size tape cassette is stored in the storage position 12 shown by the dashed line in FIG.
The L size tape cassette is stored in the storage position 13 shown by the two-dot chain line in FIG. Sensors 1a, 1b, 1c, 1d, 1e, and 1f for detecting cassette sizes are provided on the surface 10 of the storage portion that comes into contact with the bottom surface of the tape cassette when the tape cassette is stored in the cassette tape recorder. Sensors 1a and 1d are provided at positions slightly inside the center of both sides of the S size tape cassette at storage position 11, and sensors 1a and 1d are provided at positions slightly inside the center of both sides of the M size tape cassette at storage position 12, respectively. are provided with sensors 1b and 1e,
Sensor 1 is installed at a position slightly inside the center of both sides of the L size tape cassette in storage position 13.
c and 1f are provided. Although not shown in the drawings, a pair of movable reel hub shafts are provided on the surface 10 of the storage portion that comes into contact with the lower surface of the tape cassette. Also, on the surface of the storage section that comes into contact with the top surface of the tape cassette, there is a storage position 1 for the S size tape cassette.
A sensor 4 for identifying the tape thickness is provided at a position slightly inside the center of the back surface of the tape. FIG. 3 is a perspective view of a B-type tape cassette in which the cassette size is S and the tape thickness is 13 μm in one embodiment of this invention. 15 is a cassette case, and the upper surface 17 of this cassette case 15
A recess 16 for tape thickness information is formed approximately at the center of the edge formed by the back surface 18. In addition, the cassette cases of M size and L size tape cassettes in which thin magnetic tapes are stored also have a position corresponding to the recess 16 of the cassette case 15, that is, the same position as the position shown by the broken line in FIG. The recess is formed so that The case where a B-type tape cassette is used in a cassette tape recorder will be explained. A B-type tape cassette is loaded into a cassette tape recorder, and the cassette case 15 is placed in a predetermined storage position 1 as shown in FIG.
It is stored in 1. Part of the light from the light emitting section is blocked by the cassette case 15, and the sensors 1a, 1b, 1c, 1d, 1
A state in which outputs are generated from all sensors 1b, 1c, 1e, and 1f is changed to a state where outputs are generated from sensors 1b, 1c, 1e, and 1f. Moreover, the sensor 4 for identifying the tape thickness is connected to the recess 16 of the cassette case 15.
No output is generated. The CPU 3 has sensors 1b and 1 from the detection circuit 2.
Digital data indicating that outputs c, 1e, and 1f are generated, that is, digital data corresponding to the S size cassette case 15 is supplied. Further, the CPU 3 is supplied with digital data from the detection circuit 5 indicating that the output of the sensor 4 for identifying the tape thickness is not generated, that is, digital data corresponding to a thin magnetic tape. Therefore, the CPU 3 determines that it is a B-type tape cassette in which a thin magnetic tape is housed in the S-sized cassette case 15, and generates tape cassette data corresponding to this tape cassette. This tape cassette data is supplied to the display circuit 7, where it is converted into a display signal, and the display section 19 displays the tape length corresponding to this display signal based on this display signal. Further, the tape cassette data is made into a control signal from the CPU 3, and is supplied to the plunger of the mechanism section, and the S size tape cassette 15 is
The reel hub axis is controlled to correspond to the reel hub. Table 2 below shows the output relationship when each of the six types of tape cassettes of types A, B, C, D, E, and F are used. Output is generated at the locations marked with ○ in Table-2, and these A, B, C, D,
Tape cassette data corresponding to E and F type tape cassettes is generated in the CPU 3, and the corresponding tape length is displayed on the display section 19.

[Table] In addition, when there are two types of tape thickness as in this embodiment, sensors 1a, 1b, 1c and 1d,
Three sensors, either 1e or 1f, are used as sensors for identifying tape thickness, and a groove or through hole for tape thickness information is provided on the cassette case side corresponding to the position of the sensor. It's okay. Furthermore, the four sensors 1a, 1b, 1d, and 1e may be provided at positions slightly outside the center on both sides of the tape cassettes at storage positions 11 and 12; and 1
Either one of the two sensors d and 1e may be used as a sensor for identifying the tape thickness, and a protrusion for tape thickness information may be provided on the cassette case side so as to correspond to the position of the sensor. Naturally, this invention can be easily applied to a cassette tape recorder that can accommodate seven or more types of tape cassettes. [Effect of the invention] According to this invention, the cassette size detection means 1
A sensor is installed in the cassette tape recorder as a
As the tape thickness identification means 14 and 16, a recess or the like for tape thickness information is provided in the cassette case, a sensor for identifying the presence or absence thereof is provided in the cassette tape recorder, and the type of tape cassette is determined based on the output from each sensor. Then, the tape length (usable time) corresponding to the determined type of tape cassette is displayed on the display section 19. Therefore, the tape length or usable time can be accurately displayed on the cassette tape recorder, and erroneous operations by the operator of the cassette tape recorder can be eliminated.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of this invention, Fig. 2 is a top view of a tape cassette storage section of a cassette tape recorder in an embodiment of this invention, and Fig. 3 is a tape cassette in an embodiment of this invention. FIG. 1, 1a, 1b, 1c, 1d, 1e, 1f...
Sensor for detecting cassette size, 2, 5...Detection circuit, 3...CPU, 4...Sensor for identifying tape thickness, 6...ROM, 7...Display circuit, 16...
... Concavity for tape thickness information, 19... Display section.

Claims (1)

[Claim for Utility Model Registration] It is possible to use tape cassettes of a plurality of cassette sizes, and there are a plurality of thicknesses and lengths of magnetic tapes stored in cassette cases of the plurality of cassette sizes. The tape length is uniquely defined according to the cassette size and tape thickness.In a tape recorder capable of using a tape cassette, a cassette size detection means provided in connection with a cassette storage section and a cassette Tape thickness identification means provided in connection with the case and data indicating the tape length corresponding to the cassette size and tape thickness are stored, and the output signal of the cassette size detection means and the output of the tape thickness identification means are stored. 1. A cassette tape recorder comprising: a signal; and a decoder that generates data indicating a corresponding tape length based on the signal.