JPH02236847A - Cassette tape recorder - Google Patents

Abstract

PURPOSE:To securely and highly precisely detect an automatic tape selector and a miserasure preventing function and to reduce the recorder in weight and thickness by providing a detecting switch mechanism capable of opening and closing a 1st terminal and a 2nd terminal in response to the state of a back part of a cassette tape. CONSTITUTION:A tip inclined part 16a of a 1st detecting lever 16 is pushed by a lower peripheral part of the back part of the cassette tape 19, and moreover a movable terminal 18A is pressed by an engaging part 16b to be abutted against a fixed terminal 15A. Then, a 2nd detecting lever 17 is turned in the direction of C1, and a movable terminal 18B is pressed by an engaging part 17a to be opposite to a hole position of a miserasure preventing claw 19a to the tape 19. Now, when the miserasure preventing claw 19a is not present, the lever 17 is turned by energizing force of the movable terminal 18B, and a fixed terminal 15B and the movable terminal 18B are turned into the opening state. Similarly, this is utilized for detecting the chrome/normal of the tape 19 as well. Thus, the recorder can easily be reduced in its weight and thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cassette tape recorder.

Background Art In recent years, cassette tape recorders have become significantly smaller, thinner, and more multifunctional. FIG. 11 is a perspective view showing a conventional general cassette tape recorder, in which 1 is a mechanism board for driving the cassette tape 2, 3 is on the upper surface side of the mechanism board 1, and the mechanism board is for storing the cassette tape 2. On the other hand, the cassette lid body is rotatable in the direction of the arrow A on the axis 4, 6 is a bottom cover and a web net for storing the lower side of the mechanism board 1, and 6 is mounted on the flint board 7, and the cassette lid is rotated in the direction of the arrow A. A detection switch 8 detects the presence or absence of the cassette tape 2 by pressing the lever part 6a with the tape 2, and a slider 8 selects the type of cassette tape. The switch is mounted on the printed circuit board T.

Reference numeral 9 denotes a detection lever that detects the presence or absence of the erroneous erasure prevention claw 2a on the cassette tape 2, rotates in the direction of arrow C, and is interlocked with the mechanism.

Problems to be Solved by the Invention However, with the configuration of the conventional cassette tape recorder as described above, it is difficult to detect the presence or absence of a cassette tape, select the type of cassette tape (metal, chrome, normal),
There are the following issues in detecting the accidental erasure prevention claws.

In detecting the presence or absence of a cassette tape. In recent years, as mechanisms have become full-logic, smaller, and thinner, damage to the mechanism due to malfunctions or incorrect operations when a cassette tape is not installed or during the installation process has become a problem.In the conventional configuration, the detection switch 6 If it is moved closer to the rotating shaft 4 of the cassette lid 3, the detection accuracy will be lowered, and if it is moved further away, a force will be applied in the direction of pushing up the cassette tape 2. There were problems such as the cassette tape floating and the head contact between the tape and the magnetic head changing.

Considering portability, which is the basis for making the switch for selecting the type of cassette tape smaller and thinner, it is necessary to operate a small knob such as slide knob 8 every time you change the cassette tape, making it easy to control audio. It deviates from the basics of Votaple products, which is to have fun.

When detecting the accidental erasure prevention claw, it is necessary to reduce the stroke (arrow C) of the detection lever 9 in order to ensure smooth loading and unloading of the cassette tape 2, and conversely, to increase detection accuracy, the stroke (arrow C) Currently, the amount of protrusion of this detection mechanism section from the cabinet is extremely large despite the set being made smaller and thinner.

Therefore, in view of these conventional problems, the present invention detects the presence or absence of a cassette tape, the type of tape, and the accidental erasure prevention claw in one block, and makes these mechanisms compact and thin. The object of the present invention is to provide a cassette tape recorder that can be made smaller, thinner, and portable by making the cassette tape recorder smaller and thinner.

Means for Solving the Problems The cassette tape recorder of the present invention has a first terminal and a second terminal located opposite to the back side of the cassette tape to be loaded.
The main body has its terminals facing each other. an operating panel supported rotatably within a certain angular range with respect to the main body and biased by the first terminal so that its end follows the back surface of the cassette tape; a detection lever rotatably supported by the cassette tape and biased by the second terminal so that the end thereof is along the back surface of the cassette tape; The present invention is characterized by comprising a detection switch mechanism configured to open and close the first terminal and the second terminal.

here. The detection switch mechanism can detect the presence or absence of a loaded cassette tape by configuring the end of the detection lever to be able to come into contact with the lower edge of the back surface of the cassette tape. In addition, the detection switch mechanism is configured so that the detection lever can be rotated in a hole with a claw to prevent accidental erasure provided on the back of the cassette tape or in a hole for detecting the type of tape. Or the tape type can be determined.

Furthermore, the cassette tape recorder of the present invention is as follows. A first switch is provided at a position opposite to the back side of the cassette tape to be loaded, and is arranged in parallel with a first switch consisting of a first terminal and a second terminal facing each other, and a second switch consisting of a third terminal and a fourth terminal facing opposite each other. a main body, supported rotatably within a certain angular range with respect to the main body, and biased by at least one of the first terminal and the third terminal so that the end portion follows the back surface of the cassette tape; a first detection lever supported rotatably within a certain angle range with respect to the operating panel and biased by the second terminal so that its end is along the rear surface of the cassette tape; On the other hand, it is supported so that it can rotate within a certain angle range. A second detection lever is biased by the fourth terminal so that an end thereof is along the back surface of the cassette tape, and each of the first and second detection levers corresponds to the situation of the back surface of the cassette tape. According to the above
, a detection switch mechanism configured to open and close each of the second switches.

Here, the detection switch mechanism detects the presence or absence of the cassette tape loaded by the first switch by forming the end of the first detection lever so that it can come into contact with the lower edge of the back of the cassette tape. On the other hand, by forming the second detection lever so that it can rotate within a hole having a claw to prevent accidental erasure or a tape type detection hole provided on the back of the cassette tape, the cassette tape can be loaded by the second switch. It is possible to determine the type of accidental erasure prevention nail or tape.

In addition, the detection switch mechanism is configured such that the first detection lever is rotatable in a hole provided on the back side of the cassette tape and has a claw to prevent accidental erasure. Detects the presence or absence of the accidental erasure prevention claw,
On the other hand, by forming the second detection lever rotatably within the tape type detection hole provided on the back of the cassette tape, it is possible to determine the tape type of the cassette tape loaded by the second switch. can.

Furthermore, the cassette tape recorder of the present invention is provided at a position opposite to either the right or left end of the back surface of the cassette tape to be loaded, and has a first terminal and a second terminal facing each other.
a main part in which a first switch consisting of a terminal, a second switch consisting of a third terminal and a fourth terminal facing each other are juxtaposed; and a main body part supported rotatably within a certain angle range;
Place the first tape so that the end is along the back side of the cassette tape.
An operating panel biased by at least one of the terminal and the third terminal, and an erroneous erasure prevention device supported rotatably within a certain angle range with respect to the operating panel, the end of which is provided at the end of the back surface of the cassette tape. a first detection lever biased by the second terminal so as to come into contact with the lower plane of the hole having a claw; A second detection lever is biased by the fourth terminal so as to be rotatable within the chrome/normal tape detection hole provided adjacent to the center side of the hole having the accidental erasure prevention claw. and the above first and second
The present invention is characterized by comprising a detection switch mechanism configured such that the first and second switches are opened and closed depending on the situation of the back surface of the cassette tag to which each detection lever corresponds.

Furthermore, the cassette tape recorder of the present invention is provided at a position opposite to either the left or right end of the back surface of the cassette tape to be loaded. A first terminal and a second terminal facing each other
a main body in which a first switch consisting of a terminal and a second switch consisting of a third terminal and a fourth terminal facing each other are juxtaposed;
an operating board biased by at least one of the first and third terminals so that an end thereof is along one end of the back surface of the cassette tape; and an operating board that is rotatable within a certain angle range with respect to the operating board. a first detection lever supported and biased by the second terminal so as to be rotatable within a hole having an accidental erasure prevention claw provided at one end of the back surface of the cassette tape; and the operation panel. The cassette tape is supported so as to be rotatable within a certain angle range, and is brought into contact with the lower surface of the chrome/normal tape detection hole provided adjacent to the center side of the hole with the accidental erasure prevention claw on the back of the cassette tape. The second detection lever is biased by the fourth terminal, and each of the first and second detection levers detects each of the first and second detection levers depending on the situation of the back surface of the cassette tape to which the first and second detection levers correspond. a first detection switch mechanism configured to open and close the switch; and a third switch provided at a position opposite to the other end of the back surface of the cassette tape and comprising a sixth terminal and a sixth terminal facing each other. , a main body part in which a fourth switch consisting of a seventh terminal and an eighth terminal facing each other are juxtaposed; along the edge of the sixth
An operating board biased by at least one of the terminal and the seventh terminal, and an accidental erasure prevention claw supported rotatably within a certain angle range with respect to the operating board, and provided at the other end of the back of the cassette tape. a third detection lever biased by the sixth terminal so as to be rotatable in a hole having a fourth detection lever biased by the eighth terminal so as to be rotatable within the chrome/normal tape detection hole provided adjacent to the center side of the hole having the accidental erasure prevention claw; a second detection switch configured such that the third and fourth switches are opened and closed depending on the state of the other end of the cassette tape back surface to which the third and fourth detection levers correspond; It is characterized by having a mechanism.

Furthermore, the cassette tape recorder of the present invention is characterized in that each terminal serving as a switch that is a detection switch mechanism is soldered to a printed circuit board that constitutes an operation switch of the mechanism and is placed near the back of the cassette tape. .

According to this configuration, the detection switch mechanism used is the first one.
An operating panel energized by a terminal is supported against the main body,
The detection lever that is energized by the second terminal is supported on the operation panel, and the first and second terminals as switches are operated by a link mechanism with two supporting points, so that Smooth detection operation can be achieved even if the sensor is placed in a narrow space facing the sensor. The presence or absence of a cassette tape can be detected by bringing the end of the detection lever into contact with the lower end plane of the back of the cassette tape. By establishing a rotatable relationship, it is possible to detect a nail and detect the type of tape to prevent erroneous erasure.

In addition, two detection levers are supported on the operation panel of the detection switch mechanism, and each detection lever is connected to the terminal of an individual switch.
By configuring them to be energized, it is possible to integrate the detection switch means for determining different situations on the back side of the cassette tape, and to make more effective use of the narrow space facing the back side of the cassette tape. .

In this case, the end of one of the two detection levers is brought into contact with the lower plane of the hole with the accidental erasure prevention claw provided on the back of the cassette tag, and the other detection lever is placed inside the tape type detection hole. By making it rotatable, it can be used in playback-only cassette tape recorders. The detection switch mechanism for detecting the presence or absence of a cassette tape and detecting the type of tape can be configured as one piece. In addition, both of the two detection levers are arranged so that they can rotate within the hole with the accidental erasure prevention claw and the tape type detection hole provided on the back of the cassette tape. The detection switch mechanism, which is used in a cassette tape recorder for both recording and playback, can be constructed as a single piece to detect the type of cassette tape and detect a claw to prevent accidental erasure.

Furthermore. Of the two detection levers supported on the operation panel, the end of one of the detection levers is in contact with the lower plane of the hole with one of the accidental erasure prevention claws on the back of the cassette tape, and the other detection lever is in contact with the accidental erasure prevention claw. By making it rotatable in the hole adjacent to the center side of the hole with the prevention claw, a playback-only cassette f- has functions of automatic chrome/normal tape type switching and cassette tape automatic detection. A precoder can be realized.

Furthermore, a detection switch mechanism having two detection levers is arranged at the left and right ends of the back of the cassette tape, and one of the two detection levers of the first detection switch mechanism is connected to one of the left and right ends of the back of the cassette tape. The second detection lever is rotatable in a hole that has an accidental erasure prevention claw at the end, and the tip of the other detection lever is in contact with the lower plane of the chrome/normal detection hole adjacent to the center from the hole position. Each of the two detection levers of the detection switch mechanism of
By making it possible to rotate within the normal detection hole,
It has functions such as automatic switching between chrome and normal tape types, automatic cassette tape detection, and claw detection to prevent accidental erasure in both forward and reverse directions, creating a recording/playback cassette tape recorder equipped with a reverse mechanism. be able to.

And the terminal as the switch of the detection switch mechanism.
By configuring the operation switch of the mechanism and soldering it to a printed circuit board disposed near the rear surface of the cassette tape, the narrow space containing the operation switch and facing the rear surface of the cassette tape can be used more effectively.

EXAMPLES Hereinafter, examples of the present invention will be described in detail based on the drawings.

FIG. 1 is a partial perspective view showing an outline of an embodiment of a cassette tape recorder according to the present invention, and is a view seen from the direction of the dashed-dotted line arrow in the overall configuration diagram of FIG. 2.

In Fig. 1, 11 is a mechanism board. Reference numeral 12 denotes a delivery/delivery board to which the detection switch main body 13 is connected.

Reference numeral 14 denotes an operation panel configured to be rotatable at a constant angle in the direction of the arrow ▲ by the shaft portion 131L of the detection switch main body 13;
This operation board 14 is the soldered part 12 of the printed circuit board 12! L
It is pushed toward the cassette tape side by fixed terminals 15▲, 16B that are integrated with the detection switch main body 13 and are soldered to the detection switch body 13.

16 is a first detection lever % 17 is a second detection lever, which is connected to the shaft portion 14a of the operation panel 14 by arrows B and C, respectively.
It is configured to be rotatable in the direction of the printed circuit board 120.
Detection switch body 1 soldered at soldered part 12b
The movable terminals 18▲ and 18B provided integrally with the cassette tape 3 are biased toward the cassette tape, respectively. Here, fixed terminal 16▲. 16B and movable terminal 18▲, 18
B constitutes a leaf switch in the detection switch main body 13. Further, the operation board 14 is rotatable relative to the detection switch body 13, but the fixed terminals 16▲, 16B
The biasing force due to the elastic force is the upper surface 1 of the switch body 13.
3b is prevented by abutting the stopper portion 14b, and the operation panel 14 is prevented from touching the switch body 1'3.
It is configured to rotate within a certain angular range relative to the main body.

In Figures 1 and 2. A side cabinet 24 covers the printed circuit board 12, the detection switch body 13, and the like. Reference numeral 26 denotes an intermediate cabinet, which constitutes a space between the cassette lid 26 that stores the cassette tape and the bottom cabinet 27 that stores the mechanism board 11.

The detection switch body 13 is installed on the printed circuit board 1.
With 2. Mechanism board 11 and intermediate cabinet 2
This is done by attaching the intermediate cabinet 26 and the side cabinets 24 to the mechanism board 11 with screws 29.

With the above configuration, the following describes its function. Third
This will be explained based on FIGS.

Figures 3 and 4 show the first detection lever 16 in Figure 1.
This is a partial sectional view, and the operation of the first detection lever 16 will be explained.

FIG. 3 shows the state in which the cassette tape 19 is being installed, and 28 is a square battery. In this state, fixed terminal 1
The six people and the movable terminal 18A are separated at the tip and are in an oven state. When the cassette tape 19 is inserted in the direction of the arrow D, the operation plate 14 is guided by the inclined end portion 14a and rotates in the direction of the arrow ▲1. However, the 16 fixed terminals and the movable terminal 18A remain open due to the elastic force of the 18 movable terminals until the lower edge of the cassette tape 19 reaches the tip inclined portion 1θa of the first detection lever 16.

FIG. 4 shows the state after the cassette tape 19 has been installed, and the lower edge of the back surface of the cassette tape 19 is pressed against the tip inclined portion 16a of the first detection lever 16. First detection leper 16
By pressing this movable terminal 18▲ with the engaging portion 16b. The 18 movable terminals and the 16 fixed terminals come into contact at their tips and are electrically closed. When the cassette tape 19 is taken out, the first detection lever 16 and the operation panel 14 are again biased to the left by the locking properties of the movable terminal 18 and the fixed terminal 16▲, respectively, resulting in the state shown in FIG. 3. Fixed terminal 1
The six people and the movable terminal 18▲ become open again. Therefore, the presence or absence of a cassette tape can be detected by the switch consisting of 16 and 18 terminals which are opened and closed by the movement of the first detection lever/C-16.

Next, FIGS. 6 to 8 show the second detection lever 17 in FIG.
This is a partial sectional view, and the operation of this second detection lever 17 will be explained below.

FIG. 6 shows the state in which the cassette tape 19 is being loaded. In this state, the fixed terminal 1sB and the movable terminal 18B are separated at their tips and are electrically open.
The second detection lever 17 is in a state of being projected forward by the movable terminal 18B.

Then, when the cassette tape 19 is inserted in the direction of arrow D, the operation plate 14 is guided by the inclined tip portion 1411 and rotates in the direction of arrow D. However, fixed terminal 15B and movable terminal 1
8B remains open until the cassette tape 19 is further inserted and its lower edge touches the second detection lever 17.

When the cassette tape 19 is further inserted, the second detection lever 17 rotates in the direction of arrow C, and the second detection lever 17 is rotated in the direction of arrow C.
The movable terminal 18B is pushed against its elastic force by the retaining portion 17& of the cassette tape 19, as shown in FIG.

When the accidental erasure prevention claw 191L is present, the accidental erasure prevention claw 1
91L pushes the second detection lever 17 and closes the movable terminal 1sB and the fixed terminal 15B.

On the other hand, when the accidental erasure prevention claw 19a of the cassette tape 19 is broken as shown in FIG. The second detection lever 17 is pushed and rotated by the biasing force of the movable terminal 18B, and the fixed terminal 15B and the movable terminal 18B are placed in an oven state.

The operation of this second detection lever 17 is as follows:
It is used to detect the chrome/normal tape detection hole provided on the back of the camera 9, and the same operation is used for that detection as well. In this way, the presence or absence of a wall on the back surface of the cassette tape 19 can be detected. cassette tape 19
When extracting . From the state shown in FIG. 6, the second detection lever 17 is further pushed and rotated in the direction of the arrow in the figure by the inclined tip portion, and then returns to the original state (FIG. 6), and the fixed terminal 16B and movable terminal 18B are It becomes an oven. From the state shown in FIG. 7, the second detection lever 17 is pushed in the direction of arrow C2 in the same figure by the lower part of the hole 19b of the cassette tape 19, and returns to the original state (FIG. 6) via the state shown in FIG. Return to

Here, the detection switch main body 13 having the first and second detection levers 16 and 17 is laid out as shown in FIG. 9, and realizes a reproduction-only cassette tape recorder. In other words, only the detection switch main body 13 is configured on the printed circuit board 12. A first detection lever 1 is located at a location corresponding to the wrong erasure prevention claw 19a on the reverse side of the cassette tape 19.
6, by configuring the second detection lever 17 at a position corresponding to the chrome/normal tape detection hole 190 adjacent to the inner side thereof, the presence/absence of the cassette tape 19 and the detection of the chrome/normal tape can be detected. It is now possible to do so. In this case, the first detection lever 16 is connected to an erroneous erasure prevention claw 19a provided on the back side of the cassette tape 19.
The presence or absence of a cassette tape is detected by abutting the tip end 16a against the lower plane of the hole having a cassette tape. It goes without saying that the second detection lever 17 is rotatably connected within the chrome/normal detection hole 19C.

Note that in the above embodiment, the first and second detection levers 16
．． 1 and 7 are arranged side by side, but the switch with the first detection lever 16 and the switch with the second detection lever 17 are configured separately, and the lower plane of the hole with the accidental erasure prevention claw, the hole. Chrome adjacent to the inside of /
It may also be associated with the normal detection hole. By arranging the second detection lever 17 so as to correspond to the one-tal detection hole provided in the center of the back surface of the cassette tape, it is possible to detect one-tal tape. Also,
The detection switch body 13 in which the first and second check levers 16 and 17 are arranged side by side is connected not only to the erroneous erasure prevention claw on the reverse side of the cassette tape 19 but also to the erroneous erasure prevention claw on the forward rotation side. It may be made to correspond. In this case, the tip of the first detection lever 16 is brought into contact with the lower plane of the hole having the erroneous erasure prevention pawl, and the second detection lever 17 is placed in contact with the chrome/black metal plate adjacent to the inner side of the hole having the erroneous erasure prevention pawl. Rotatably corresponds to the normal detection hole. That is, this can be done by changing the arrangement of the detection levers of the detection switch body 13.

Further, in the above embodiment, the application to a playback-only cassette tape recorder has been described, but it goes without saying that the present invention can also be applied to a recording/playback cassette tape recorder. In this case. As shown in FIG. 10, the detection switch main body 13 is disposed on the back side of the cassette tape 19 at a portion having a normal rotation side mistaken erasure prevention claw 19a'. That claw 19
The second detection lever 17 is rotatable in the hole having a',
Chrome/normal detection hole 19 adjacent to the inside of the hole
(A groove is arranged so that the tip of the first detection lever 16 comes into contact with the lower plane of the cassette tape 19. On the other hand, two second Detection switch body 2 with detection levers 17 arranged side by side
0, and the detection switch main body 20 constituted by the second detection lever 17 is inserted into the hole having the reverse-side accidental erasure prevention claw 19a and the chrome/normal tape detection hole 190 adjacent to the inner side of the hole. Constructed to be rotatable. As a result, it is possible to realize a mechanism for detecting the presence/absence of the cassette tape 19, chrome/normal detection, and detecting the presence/absence of the wrong erase prevention claw. In addition, by providing an operating switch 22 for driving the mechanism on the printed circuit board 12 constituting the detection switch, the dead space between the detection switches can be filled and the space can be used effectively.

As shown in the above embodiment, the detection mechanism, which was conventionally scattered as shown in Fig. 11, can be gathered on the back side of the cassette tape, and the amount of protrusion of the cabinet has also been reduced compared to the conventional size 2, as shown in Fig. 10. The protrusion amount d can be reduced as shown in the figure. - It can also automatically detect chrome/normal tags, and the effect is extremely large.

Effects of the Invention In the present invention, a detection switch for detecting the presence/absence of a cassette tape is configured by a link mechanism having two supporting points on a printed circuit board provided on the back side of the cassette tape, and opening/closing of a movable contact. This enables reliable and highly accurate detection.

In addition, the manual type slide switch installed on the printed circuit board can function as an auto tape selector by simply changing the detection lever of the configuration described above, and the detection switch can also detect the accidental erasure prevention claw, making it compact. This is a very effective mechanism for a thin cassette tape recorder. Furthermore, by integrating two adjacent detection switches and combining detection levers, it is possible to expand from a playback-only set to a recording/playback set, which is also cost effective. In addition, by providing the operating switch for driving the mechanism on the printed circuit board constituting the detection switch in a dead space equal to the thickness of the detection switch, space can be used effectively, which is very effective in an ultra-small set.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional perspective view of a main part of a cassette tape recorder showing an embodiment of the present invention, FIG. 2 is a perspective view showing the overall configuration of FIG. 1, FIGS. 3, 4, ε, Figure 6, Figure 7,
FIG. 8 is a sectional view for explaining the operation of the same embodiment, FIGS. 9 and 10 are exploded perspective views of the embodiment of the present invention, and FIG. 11 is an exploded perspective view of a conventional cassette tape recorder. 11・゜゜・゜゛Mechanism board. 12.゛...゜Printed circuit board, 13...Detection switch body, 14.
...Operation board, 15▲, 16B...Fixed terminal. 16...First detection lever. 17...
...Second detection lever, 18▲, 18B゜゜゛゜゜movable terminal, 19 towns゜゜゜cassette tape. Name of agent Patent attorney Shige Takashi Awano 1 person

Claims (9)

[Claims] (1) A main body part with a first terminal and a second terminal arranged opposite each other at a position opposite to the back part of the cassette tape to be loaded, and supported so as to be rotatable within a certain angle range with respect to the main body part. an operating board that is biased by the first terminal so that its end follows the back surface of the cassette tape; and a detection lever biased by the second terminal so as to open or close the first terminal and the second terminal depending on the situation of the back surface of the cassette tape to which the detection lever corresponds. A cassette tape recorder comprising a detection switch mechanism configured as follows. (2) The detection switch mechanism is characterized in that the end of the detection lever is formed so as to be able to come into contact with the lower edge of the back surface of the cassette tape, and is configured to detect the presence or absence of a cassette tape to be loaded. The cassette tape recorder according to claim 1. (3) The detection switch mechanism is configured such that the detection lever can rotate within a hole with a claw to prevent accidental erasure provided on the back of the cassette tape or a hole for detecting the type of tape, thereby preventing accidental erasure of the installed cassette tape. 2. The cassette tape recorder according to claim 1, wherein the cassette tape recorder is configured to determine the nail or the type of tape. (4) A first switch, which is provided at a position opposite to the back surface of the cassette tape to be loaded, and is made up of a first terminal and a second terminal facing each other, and a second switch is made of a third terminal and a fourth terminal facing each other. are arranged side by side, and the main body is rotatably supported within a certain angular range with respect to the main body, and is biased by at least one of the first terminal and the third terminal so that the end portion is along the back surface of the cassette tape. a first detection lever that is rotatably supported within a certain angle range with respect to the operation panel and is biased by the second terminal so that the end thereof is along the back surface of the cassette tape; a second detection lever supported rotatably within a certain angular range with respect to the operation panel and biased by the fourth terminal so that an end thereof is along the back surface of the cassette tape; A cassette tape recorder comprising a detection switch mechanism configured such that each of the first and second switches is opened or closed depending on the situation of the cassette tape back surface to which each detection lever corresponds. (5) The detection switch mechanism is formed such that the end of the first detection lever can come into contact with the lower edge of the back surface of the cassette tape, and the first switch detects the presence or absence of the cassette tape to be loaded. On the other hand, a second detection lever is formed so as to be rotatable within a hole provided on the back side of the cassette tape having a claw to prevent accidental erasure or within a tape type detection hole, and the cassette tape mounted by the second switch is erased accidentally. 5. The cassette tape recorder according to claim 4, wherein the cassette tape recorder is configured to determine the prevention claw or the type of tape. (6) In the detection switch mechanism, the first detection lever is formed to be rotatable in a hole having an accidental erasure prevention claw provided on the back of the cassette tape, and prevents accidental erasure of the cassette tape loaded by the first switch. Detects the presence or absence of nails, while the second
The detection lever is rotatably formed in a tape type detection hole provided on the back surface of the cassette tape, and is configured to determine the tape type of the loaded cassette tape by means of a second switch. The cassette tape recorder according to claim 4. (7) A first switch, which is provided at a position facing either the left or right end of the back side of the cassette tape to be loaded, and is composed of a first terminal and a second terminal facing each other, a third terminal facing oppositely, and A main body part in which a second switch consisting of a fourth terminal is juxtaposed; an operating board biased by at least one of the three terminals; the operating board is rotatably supported within a certain angle range with respect to the operating board; the end thereof has an accidental erasure prevention claw provided at the end of the back surface of the cassette tape; a first detection lever biased by the second terminal so as to come into contact with the lower plane of the hole; The second detection lever is biased by the fourth terminal so as to be rotatable within the chrome/normal tape detection hole provided adjacent to the center side of the hole having the accidental erasure prevention claw, and the second detection lever is biased by the fourth terminal. A playback device characterized by comprising a detection switch mechanism configured such that the first and second switches are opened and closed depending on the situation of the back surface of the cassette tape to which each of the first and second detection levers corresponds. A dedicated cassette tape recorder. (8) A first switch, which is provided at a position opposite to either the left or right end of the back side of the cassette tape to be loaded, and is composed of a first terminal and a second terminal facing each other, a third terminal facing oppositely, and a main body part in which a second switch consisting of a fourth terminal is juxtaposed; An operating panel biased by at least one of a first terminal and a third terminal, and an erroneous erasing panel supported rotatably within a certain angle range with respect to the operating panel, and provided at one end of the back surface of the cassette tape. a first detection lever biased by the second terminal so as to be rotatable within a hole having a prevention claw, and a back surface of the cassette tape supported rotatably within a certain angle range with respect to the operation board. The second detection lever is biased by the fourth terminal so as to come into contact with the lower surface of the chrome/normal tape detection hole, which is provided adjacent to the center side of the hole having the accidental erasure prevention claw. , depending on the situation of the cassette tape back side to which the first and second detection levers correspond.
a first detection switch mechanism configured to open and close each switch; and a first detection switch mechanism, which is provided at a position opposite to the other end of the back surface of the cassette tape, and includes a fifth terminal and a sixth terminal facing each other. a main body part in which a fourth switch consisting of three switches and a seventh terminal and an eighth terminal facing each other are juxtaposed; an operating board biased by at least one of the fifth terminal and the seventh terminal along the other end of the cassette tape; A third detection lever is biased by the sixth terminal so as to be rotatable in a hole having an accidental erasure prevention claw provided at the other end of the lever, and a third detection lever is rotatable within a certain angle range with respect to the operation plate. The cassette tape is attached by the eighth terminal so as to be rotatable within the chrome/normal tape detection hole provided adjacent to the center side of the hole having the accidental erasure prevention claw on the other end surface of the cassette tape. the third and fourth detection levers are activated according to the situation of the other end of the cassette tape back surface to which each of the third and fourth detection levers corresponds.
, a recording/playback cassette tape recorder comprising a second detection switch mechanism configured to open and close each of the fourth switches. (9) In any one of claims 1 to 8, the detection switch mechanism is characterized in that each terminal as a switch constitutes an operation switch of the mechanism and is soldered to a printed circuit board disposed near the back of the cassette tape. The cassette tape recorder mentioned.