JPH0373948B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a cassette in which an eject operation is performed using the rotational force of a motor for driving tape running, and the motor is also stopped by the end of the eject operation. related to type tape recorders.

[Technical background of the invention and its problems] It is extremely preferable to eject the tape cassette using the rotational force of a motor from the viewpoint of reducing the operating force. However, when the eject operation is performed using the rotational force of the motor, there is a problem in that an operation to stop the motor must be performed once again after the eject operation.

[Object of the Invention] The present invention has been made based on the above-mentioned circumstances, and an object of the present invention is to make it possible to eject a tape cassette using the rotational force of a motor for driving tape travel, and to eject a tape cassette. To provide a cassette type tape recorder which eliminates the trouble of double operation by stopping a motor before the end of operation.

[Summary of the Invention] To achieve the above object, the cassette tape recorder of the present invention includes a cassette holder that is movable between a cassette loading position and a cassette ejection position;
a motor switch having first and second fixed contacts and a movable contact that selectively contacts each of the fixed contacts, the movable contact being biased toward the first fixed contact by a spring force;
Connecting one pole to one terminal of a power supply via a first fixed contact and a movable contact of the motor switch,
a tape running drive motor whose other pole is connected to the other terminal of the power supply; and a second motor of the motor switch.
a changeover switch inserted between a fixed contact and one terminal of the power source, the switch being in an on state when the cassette holder is in a cassette loading position and being in an off state when the cassette holder is in a cassette ejecting position; A main rotating body that is constantly rotationally driven by the motor, a driven rotating body that does not engage with the main rotating body within a certain angular range but rotates in response to the rotational force when engaged with the main rotating body, and this an eject mechanism that is actuated by the rotational force of the driving rotor applied via the driven rotor to move the cassette holder from a cassette loading position to a cassette ejecting position; At the same time, the movable contact of the motor switch is held on the second fixed contact side, and the movable contact of the motor switch is returned to the first fixed contact side by manual operation force, and the driven rotating body is released. After the eject mechanism is actuated, the driven rotor is again held within a certain angular range where it does not engage with the drive rotor, and the movable contact of the motor switch is connected to the second fixed contact. It is characterized by comprising a rotation transmission control member held at the side.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a plan view, and a tape drive mechanism including a pair of reel shafts 2a, 2b, capstan shafts 3a, 3b, and a motor 4 for rotationally driving these is mounted on the upper surface side of the main board 1. ing.
The motor 4 simultaneously rotates both capstan shafts 3a and 3b in their respective tape feeding directions, and alternatively rotates the pair of reel shafts 3a and 3b in their respective tape winding directions.

Further, on the upper surface of the main board 1, a magnetic head 5 for recording and reproducing and pinch rollers 6a and 6b corresponding to each capstan shaft 3a and 3b are mounted.

Furthermore, a cassette holder 7 is mounted on the top surface of the main board 1.
is installed. This cassette holder 7
is a rotary plate 8 that can freely rotate in the vertical direction (direction perpendicular to the plane of the paper) about the left edge in FIG. 1;
The cassette inserter 9 is supported rotatably in the vertical direction (direction perpendicular to the plane of the paper) about the right edge of the rotary plate 8 as an axis. In addition, rotating plate 8
The amount of upward rotation is regulated by a stopper 10 formed at the upper part of the side wall of the main board 1. Due to the presence of this stopper 10, the rotating plate 8 and the cassette insert 9 do not touch the main board 1 when they move upward. They are held almost parallel.

The cassette inserter 9 has a cassette insertion/ejection port 11 on the right end side in FIG.
1 through which the tape cassette 12 can be inserted and removed. Then, by rotating the rotary plate 8 downward with the tape cassette 12 inserted into the cassette inserter 9, the tape cassette 12 can be removed.
are loaded onto the reel shafts 2a, 2b and capstan shafts 3a, 3b. Here, the rotating plate 8 rotates downward to move the tape cassette 12 onto the reel shaft 2.
The position where the tape cassette 12 is loaded onto the tape cassette a, 2b and the capstan shafts 3a, 3b is called the "cassette loading position" of the cassette holder 7, and the rotating plate 8 rotates upward to insert and remove the tape cassette 12 from the cassette insertion/ejection opening 11. The position where this is possible will be referred to as the "cassette release position" of the cassette holder 7.

When the cassette holder 7 moves from the cassette ejecting position to the cassette loading position, the magnetic head 5 moves downward in FIG. I will do it. Also, when the magnetic head 5 is inserted into the tape cassette 12 in this way, the pinch roller on the same side as the reel shaft driven by the motor 4 is pressed against the capstan shaft on the same side. I come to do it. For example, when the right reel shaft 2a is being driven, the right pinch roller 6a comes into contact with the right capstan shaft 3a. In this way, the magnetic tape is driven rightward (or leftward), and a recording or reproducing operation is performed.

Note that reference numerals 13 and 14 in FIG. 1 are operating members for fast forwarding the tape. These operating members 13 and 14 are arranged above the magnetic head 5 so as to overlap each other, and are movable back and forth in the left and right directions in the figure. Further, they are constantly urged to the right by tension springs 13a and 13b, respectively. By moving one operating member 13 to the left, the rotational force of the motor 4 is transmitted to the right reel shaft 2a as high-speed rotation, and by moving the other operating member 14 to the left, the rotational force of the motor 4 is transmitted to the right reel shaft 2a. The rotational force is transmitted to the left reel shaft 2b as high-speed rotation.

A spring receiving member 15 is rotatably mounted on the upper surface of the rotating plate 8, with one end being pivotally supported by a shaft 15a.

Further, an eject member 16 is attached to the rotary plate 8 and is slidable in the insertion/removal direction of the tape cassette 12 (left-right direction in FIG. 1).

The spring receiving member 15 is arranged with its rotating end facing the eject member 16 side, and the amount of rotation is regulated by an arcuate hole 17 provided in the rotating plate 8. And the eject member 16 and the spring receiving member 15
An eject spring 18 made of an expansion spring is hung between one end of the .

The eject spring 18 has a contact portion 19 at one end (the left end in FIG. 1) with which the tape cassette 12 inserted into the cassette inserter 9 comes into contact, and the other end with which the tape cassette 12 inserted into the cassette inserter 9 contacts. The tape cassette 12 has an engaging claw portion 20 that engages with one reel hub hole of the tape cassette 12.

In addition, a plate-shaped locking member 2 is provided on the lower surface side of the rotating plate 8.
1 is rotatably mounted coaxially with the spring receiving member 15. This locking member 21 has a contact piece 22 located on the line of motion of the eject member 16.
and a locking portion 23 that selectively locks the upper edge of the side wall of the main board 1 to lock the cassette holder 7 in the operating position.
The locking portion 23 is constantly urged to rotate in the direction of locking the locking portion 23 to the upper edge of the side plate of the main board 1 by the tension spring 23a.

An eject operation unit 24 is provided on the side of the main board 1 (lower side in FIG. 1). This eject operation unit 24 will be described later.

FIG. 2 is a side view of FIG. 1 viewed from the direction of the arrow. However, the motor 4 and eject operation unit 24 are omitted.

As shown in FIG. 2, a pressing force transmitting member 25 is attached to the outer surface of the side plate of the main board 1 so as to be movable forward and backward in the left-right direction in FIGS. 1 and 2. The pressing force transmission member 25 has an engaging portion 26 bent at the left end position.
and is connected to the spring receiving member 15 via a connecting rod 27. Further, this pressing force transmitting member 25 is always urged rightward by a return spring 28 made of a tension spring. When the pressing force transmitting member 25 is moved to the right (returning direction) by the return spring 28 as shown in FIGS. 1 and 2, the spring receiving member 15 is moved to the right as shown in FIG. direction (return direction), and when the pressing force transmission member 25 is moved to the left against the return spring 28, the spring receiving member 15 is also rotated to the left (forward direction) at the same time. Become.

Further, on the outer surface of the side plate of the main board 1, a plate-shaped operating force transmitting member 29 is provided below the pressing force transmitting member 25.
is attached so that it can move forward and backward in the left and right directions in FIG. The operating force transmitting member 29 is always urged rightward by a return spring 30 made of a tension spring. When the pressing force transmitting member 25 moves to the left, the operating force transmitting member 29 receives the pressing force of the pressing force transmitting member 25 at the pressure receiving part 31, and moves to the left together with the pressing force transmitting member 25. Further, the operating force transmission member 29 includes a switch operating piece 32,
It has a bent engagement piece 33, and the switch operation piece 32 is a changeover switch 50 for switching between a tape recorder and a radio (not shown) attached thereto. One of the components of the eject operation unit 24 (details of which will be described later) is operated. That is, when the operating force transmitting member 29 moves to the left as shown in FIG. 2, the changeover switch 50 enables the radio, and conversely, when the operating force transmitting member 29 moves to the right as shown in FIG. When the tape recorder is in operation, the selector switch 50 enables the tape recorder to operate.

Further, on the outer surface of the side plate of the main board 1, the front position (second
A plate-shaped interlocking member 34 is located at the left position in the figure.
It is rotatably mounted around a shaft 35 as a fulcrum.
This interlocking member 34 includes the spring receiving member 15, the ejecting member 16, the ejecting spring 18, and the locking member 2.
A connecting pin 37, which together with 1 constitutes an eject mechanism, fits into a long groove 36 provided on the side of the rotating plate 8 of the cassette holder 7.
, a pressure receiving piece 38 that receives the pressing force from the engaging part 26 of the pressing force transmitting member 25, and an engaging protrusion 3 located before and after the engaging piece 33 of the operating force transmitting member 29.
9 and 40, and is always urged to rotate counterclockwise in FIG. 2 by a cassette pressing spring 41 made of a tension spring.

The configuration of the eject operation unit 24 is as follows.
As shown in the figure. That is, a PC board 44, a driven rotating body 45, a rotation transmission control member 46, a power transmission member 47, and a switch operation member 48 are attached to the eject operation unit board 42, and the PC
A motor switch 49 and a changeover switch 50 are attached via a plate 44. The eject operation unit board 42 is fixed to the back side of the main board 1 with two screws 42a and 42b (see Fig. 6, where the mounting part of the eject operation unit 24 is seen from the back side). (This is a schematic diagram)

The rotation transmission control member 46 and the power transmission member 47
and the switch operating member 48 are each connected to a shaft 46.
It is attached to the eject operation unit board 42 via a, 47a, and 48a so as to be freely rotatable in the horizontal direction.

Further, the rotation transmission control member 46 is connected to a spring 54.
It is always urged to rotate in the clockwise direction in FIG. 5.

The rotation transmission control member 46 is bent into a U-shape, and has an engagement piece 55 at the tip of the upper piece.
The lower piece has a cam pin 56, a trigger locking piece 57, and a switch operating piece 58 for operating the movable contact 49a of the motor switch 49.

The power transmission member 47 is also bent into a U-shape, and one side of the upper piece is raised upwards to form a transmission member engaging piece 59, and a cam roller 60 is rotatably mounted on the tip of the lower piece. I support you.

The switch operation member 48 has one end as a switch engagement piece 61 that engages with the switching operation piece 50a of the changeover switch 50, and the other end as a transmission member engagement piece 62 that engages with the operation force transmission member 29. It is. This switch operating member 48 is always biased counterclockwise by a spring 63 that is stretched between it and the eject operating unit board 42, so that the changeover switch 50 is always on the radio side (that is, when used as a tape recorder). (off side).

The driven rotary body 45 is horizontally rotatably supported by the eject operation unit board 42 via a shaft 45a, and has a gear 64 on its outer periphery, and a notch 65 is formed in a part of the gear 64. is provided. Further, on the upper surface of the driven rotating body 45, a spiral cam 66 that engages with the cam roller 60 is provided at the center, and a cam groove 67 that engages with the cam pin 56 is provided around the periphery. The cam surface of the spiral cam 66 is formed such that the distance from the rotation center gradually increases as the rotation angle increases during one rotation of the driven rotor 45. Further, a part of the cam groove 67 has a stop position holding protrusion 68 projecting toward the center on the outer side edge, and a stop position holding protrusion 69 on the corresponding inner side edge. and a next-stage position holding recess 70 are provided, respectively. Furthermore, a pressure receiving protrusion 71 is provided on the upper surface of the spiral cam 66 in a protruding manner. One end of a torsion spring 73 held by a bent piece 72 of the eject operation unit board 42 is brought into elastic contact with the top end of the pressure receiving projection 71. Further, a tool insertion hole 74 is provided in a part of the driven rotary body 45, and the screw 42a is inserted through this hole 74.
Then, a tool such as a screwdriver is inserted, and the eject operation unit board 42 is attached to the main board 1 using screws 42a (see FIG. 6).

Next, the relationship among the motor 4, motor switch 49 and changeover switch 50 will be explained with reference to FIG. 7a.

Note that FIG. 7a shows a state in which the tape recorder is stopped, and one pole 4a of the motor 4 is
is connected to one terminal 75a of the power source via the first fixed contact 49b and movable contact 49a of the motor switch 49, and the other pole 4b of the motor 4 is connected to the other terminal 75b of the power source. Further, the second fixed contact 49c of the motor switch 49 is connected to one terminal 75a of the power supply via the changeover switch 50.
It is connected to the.

The elasticity of the spring 54 is applied to the movable contact 49a of the motor switch 49, and the rotation transmission control member 4
6, whereby the movable contact 49a is always biased toward the first fixed contact 49b, but when the tape recorder is in a stopped state, as will be described later, the movable contact 49a is biased toward the first fixed contact 49b. It is in contact with the second fixed contact 49c due to its action.

On the other hand, the relationship among the driven rotary body 45, the rotation transmission control member 46, the power transmission member 47, the torsion spring 73, the pressing force transmission member 25, etc. is as shown in FIG. 7b.

FIG. 7b shows a state in which the tape recorder is stopped, corresponding to FIG. ) is giving the torque. Further, the trigger locking piece 57 of the rotation transmission control member 46 engages with the stop position holding protrusion 69,
As a result, rotation of the driven rotating body 45 in the counterclockwise direction is prohibited. Furthermore, the rotation transmission control member 4
A clockwise torque is applied to the rotation transmission control member 46 by a spring 54.
The clockwise rotation of is prohibited by the contact between the cam pin 56 and the stop position holding protrusion 68. And the switch operation piece 58 of the rotation transmission control member 46
The movable contact 49a of the motor switch 49
is held on the second fixed contact 49c side as shown in FIG. 7a. The power transmission member 47 has the cam roller 60 facing the lowest part of the spiral cam 66,
and the return spring 2 with respect to the bent piece 25a provided on the pressing force transmitting member 25.
8 (see Fig. 2) so as to face each other so as to receive the elastic force of 8 (see Fig. 2).

Reference numeral 77 in FIG. 7B is a main drive gear as a main drive rotating body rotatably mounted on the main board 1. This main drive gear 77 is connected to the motor pulley 7 as shown in FIG.
8. It is always driven by the motor 4 via an endless belt 79, an intermediate pulley 80, and intermediate gears 81 and 82. And this main drive gear 7
7 is in a relationship capable of meshing with the gear 64 of the driven rotor 45, but in the state shown in FIG. The rotational force transmission path from 77 to the driven rotating body 45 is cut off. Note that 83 in FIG. 6 transfers the rotational force of the motor 4 to the capstan shafts 3a, 3b via the motor pulley 78.
It is an endless belt for transmitting information. Further, the rotational force of the motor 4 is also selectively transmitted to the reel shafts 2a and 2b via gears 81 and 82.

Returning to FIGS. 1 and 2, the pressing force transmitting member 2 is provided on the outer surface of the side plate of the main board 1.
5, the eject operation member 84 is shown in FIG.
It is attached so that it can move forward and backward in the left and right directions in FIG. This eject operation member 84 is urged rightward in the figure by a return spring 85 suspended between it and the main board 1. By pushing the eject operation member 84 to the left in the figure against the return spring 85, the engagement piece 55 of the rotation transmission control member 46 is pressed and the control member 46 is rotated counterclockwise. It is configured to allow

Next, the operation will be explained.

1, 2, and 7a and 7b show the stopped state, in which the eject member 16 is
is moving in the return direction (to the right in the figure) due to the elasticity of the eject spring 18. Further, the cassette holder 7 is at a stop position separated from the main board 1, and the locking portion 23 of the locking member 21 locks on the upper edge of the side plate of the main board 1, preventing the cassette holder 7 from moving to the cassette loading position. It is prohibited. Further, the spring receiving member 15 receives the elastic force of the return spring 28 via the connecting rod 27 and the pressing force transmitting member 25, and therefore moves in the return direction (direction of accumulating the eject spring 18). On the other hand, the operating force transmitting member 29 has its engagement piece 33 in contact with the engagement protrusion 40 of the interlocking member 34, and is prohibited from returning to the right in the figure by the return spring 30. and,
In this position, the operating force transmitting member 29 rotates the switch operating member 48 counterclockwise and holds the changeover switch 50 in the OFF state. Note that the interlocking member 34 is urged to rotate counterclockwise in the figure (the direction in which the cassette holder 7 is moved to the cassette loading position) by receiving the elasticity of the return spring 30 and the cassette pressing spring 41; Rotation is prohibited by the engagement between the long groove 36 and the connecting pin 37. Further, the motor switch 49 causes the movable contact 49a to contact the second fixed contact 49c by the rotation transmission control member 46. Further, the driven rotary body 45 is held at the first rest position by the contact between the stop position holding protrusion 69 and the trigger locking piece 57 of the rotation transmission control member 46 .

Therefore, when the tape cassette 12 is inserted into the cassette holder 7 from the cassette insertion/ejection opening 11 in the longitudinal direction and in a state substantially parallel to the main board 1,
The eject member 16 located on the insertion line of the tape cassette 12 moves forward against the eject spring 18.

As the eject member 16 moves, the amount of elastic deformation of the eject spring 18 gradually increases, and when the amount of elastic deformation exceeds the maximum position, the elastic force of the eject spring 18 increases
6 in the forward direction. Therefore, no force is required to push the tape cassette 12, and on the contrary, the tape cassette 12 is drawn into the cassette holder 7 by the elastic force of the eject spring 18.

Subsequently, the eject member 16 comes into contact with the contact piece 22 of the locking member 21 and pulls the locking member 21 so that the spring 2
Rotate against 4. Therefore, the locking portion 23 of the locking member 21 comes off the upper edge of the side plate of the main board 1 (the third
(see figure), the rotating plate 8 and interlocking member 34 of the cassette holder 7 rotate downward under the elastic force of the return spring 30 and the cassette pressing spring 41, and the cassette inserter 9 is thereby also moved to the cassette loading position. and lower the tape cassette 12 to the reel shaft 2a,
2b and capstan shafts 3a and 3b (see FIG. 4). Further, as the cassette inserter 9 descends, the magnetic head 5 moves toward the tape cassette 12 and comes into contact with the magnetic tape.

3 and 4 (a side view of FIG. 3 seen in the direction of the arrow) and FIGS. 8a and 8b show the cassette loading state, that is, the state in which the cassette holder 12 has been moved to the operating position. In this state, the engagement piece 33 of the operating force transmitting member 29 is disengaged from the engaging protrusion 40 due to the rotation of the interlocking member 34, and the operating force transmitting member 29 is returned to the right in the figure by the return spring 30. The movement of the switch operation piece 32 causes the changeover switch 50 to change over, and the changeover of the changeover switch 50 causes the motor 4 to rotate (see FIG. 8a). Then, the rotation of the motor 4 causes one of the reel shafts 2a or 2b to rotate,
Both capstan shafts 3a and 3b rotate in their respective tape winding directions, and the reel shaft on the side that is rotationally driven (for example, the pinch roller 6a on the same side as 3a is connected to the corresponding capstan shaft 3a)
A playback operation is performed by pressing the tape against the tape and running the tape. When the tape is wound to the end, a reverse mechanism (not shown) is activated to switch the tape running direction, and the reproduction operation continues.

Next, when stopping and removing the tape cassette 12, after lightly pushing the eject operation member 84 to the left in the figure against the return spring 85,
let go At this time, the rotation transmission control member 46 is pushed by the eject operation member 84 and rotates counterclockwise. Therefore, the trigger locking piece 57 of the rotation transmission control member 46 comes off the stop position holding protrusion 69 of the driven rotary body 45, and the driven rotary body 45 rotates counterclockwise due to the elasticity of the torsion spring 73. Before meshing with the main gear 77, the driven rotary body 45 is moved to the second position shown in FIG.
held in rest position. Then, at the same time as you release your hand from the eject operation member 84, the rotation transmission control member 46 is moved to the spring 54 as shown in FIG.
to remove the cam pin 56 from the next stage position holding recess 70 by rotating it clockwise. As a result, the driven rotary body 45 is rotated clockwise by the pressing force of the torsion spring 73 until it comes into contact with the main drive gear 77. The clockwise rotation of the rotation transmission control member 46 causes the switch operation piece 58 to switch the movable contact 49a of the motor switch 49 to the first fixed contact 49b as shown in FIG. 10a. Therefore, the motor 4 is connected to a power source via the first fixed contact 49b and the movable contact 49a, and the rotational force of the motor 4 is transmitted to the driven rotating body 45 via the main gear 77. And this driven rotating body 45
As a result of the rotation, the spiral cam 66 presses the cam roller, causing the power transmission member 47 to rotate significantly in the counterclockwise direction as shown in FIG. 10b. Therefore, the transmission member engaging piece 59 of the power transmission member 47 is connected to the pressing force transmission member 2.
5 is strongly pressed, the pressing force transmitting member 25 presses the pressure receiving portion 31 of the operating force transmitting member 29, and the operating force transmitting member 29 is moved in the same direction.

Then, the changeover switch 50 is switched again to the OFF side (the side that enables radio operation) as shown in FIG.
9 to rotate the interlocking member 34 clockwise in FIG. Therefore, the rotary plate 8 rotates counterclockwise, whereby the cassette inserter 9 rises to the cassette ejecting position and the tape cassette 12
the reel shafts 2a, 2b and the capstan shaft 3
It will be extracted upward from a and 3b.

Furthermore, due to the movement of the pressing force transmitting member 25, the spring receiving member 15 is rotated in the counterclockwise direction in FIG. Therefore, the eject member 16 moves rightward in the figure under the elastic force of the eject spring 18, and the tape cassette 12 is moved in the ejecting direction. Also, the locking member 2
1 is returned clockwise by the tension spring 23a to hold the locking portion 23 on the upper edge of the side plate of the main board 1.

On the other hand, the cam roller 60 will eventually become a spiral cam 6.
6, but as a result, the power transmission member 47
is returned to the initial position by the return spring 28 together with the pressing force transmission member 25. and rotation transmission control member 4
The cam pin 56 of No. 6 rides on the stop position holding convex portion 68 of the driven rotor 45 again, and the rotation transmission control member 4
6 in the counterclockwise direction against the spring 54, and move the movable contact 49a of the motor switch 49 to the second position.
The motor 4 is stopped by switching to the fixed contact 49c side (see FIG. 7a). At this time, the gear 64 of the driven rotor 45 is detached from the main rotor 77, but the pressing force of the torsion spring 73 is applied to the pressure receiving protrusion 71.
The driven rotating body 45 is rotated to the initial position shown in FIG. 7b.

In addition, in the unlikely event that the automatic stop and eject operation by the rotational force of the motor 4 are not performed due to a failure of the eject operation unit 24, etc., the pressing force transmission member 25 can be directly pushed in.
By moving this, automatic stop and eject operations can be performed.

Furthermore, by integrally attaching the motor switch 49, changeover switch 50, rotation transmission control member 46, etc. to the eject operation unit board 42 to form a unit as described above, the eject operation unit board 42 can be attached to the eject operation unit board 42 using the screws 42a and 42b. It can be easily assembled by simply fixing it to the main board 1, and maintenance, inspection, etc. can be easily performed.

Although the present invention has been described above based on one embodiment, the present invention is not necessarily limited to the above embodiment. For example, regarding the relationship between the driven rotary body 45 and the rotation transmission control member 46, as shown in FIG. The stop position holding protrusion 69 and the corresponding trigger locking piece 57 in the example can be omitted.

[Effects of the Invention] As described above, according to the present invention, it is possible to set a tape cassette using the rotational force of the motor for driving the tape travel, and the motor can also be stopped by the end of the eject operation. Therefore, it is possible to provide a cassette tape recorder that does not require the trouble of double operation.

[Brief explanation of drawings]

1 to 12 show one embodiment of the present invention, in which FIG. 1 is a plan view showing a stopped state, and FIG.
The figures are a view taken from the - arrow in Fig. 1, Fig. 3 is a plan view showing the operating state, Fig. 4 is a view taken from the - arrow of Fig. 3, Fig. 5 is an exploded perspective view of the eject operation unit, and Fig. 6. 7a, 8a, 10a, 11 and 12 are views sequentially showing the operation of the motor drive circuit, FIG. 7b, 8b, FIG. 9 and FIG. 10b are plan views sequentially showing the operation of the peripheral portion of the driven rotor, and FIG. 13 is a plan view of the peripheral portion of the driven rotor, showing another embodiment of the present invention. 4...Motor, 7...Cassette holder, 15
... Spring receiving member, 16 ... Eject member, 18
... Eject spring, 21 ... Locking member, 34 ...
...Interlocking member, 45...Followed rotating body, 46...Rotation transmission control member, 49...Motor switch, 49a
...Movable contact, 49b...First fixed contact, 49c
... Second fixed contact, 50 ... Changeover switch, 5
4... Spring, 77... Main drive gear (main rotating body), 84... Eject operation member.

Claims (1)

[Scope of Claims] 1. A cassette holder 7 that is movable between a cassette loading position and a cassette discharging position, and a movable contact 49a that selectively contacts first and second fixed contacts 49b and 49c and each of the fixed contacts. a motor switch 49 having a movable contact 49a biased by a spring force toward a first fixed contact 49b; and a first fixed contact 49b of the motor switch 49 with one pole 4a connected to one terminal 75a of a power supply. a tape running drive motor 4 connected via a movable contact 49a and the other pole 4b connected to the other terminal 75b of the power supply; and a second fixed contact 49c of the motor switch 49.
and one terminal 75a of the power supply, and is in an on state when the cassette holder 7 is in the cassette loading position and in an off state when the cassette holder 7 is in the cassette ejecting position. , a main rotating body 77 that is constantly rotationally driven by the motor 4; and a main rotating body 77 that does not engage with the main rotating body 77 within a certain angular range, and when engaged with the main rotating body 77, rotates in response to the rotational force of the main rotating body 77. a driven rotary body 45; and ejection mechanisms 15, 16, which are operated by the rotational force of the driving rotary body 77 applied via the driven rotary body 45 to move the cassette holder 7 from the cassette loading position to the cassette ejection position.
18, 21, and 34, the driven rotary body 45 is normally held within a certain angle range where it does not engage with the driving rotary body 77, and the movable contact 49a of the motor switch 49 is held on the second fixed contact 49c side; The movable contact 49a of the motor switch 49 is returned to the first fixed contact 49b side by manual operation force, and the driven rotor 45 is opened and engaged with the main drive rotor 77, and the eject mechanism 15, 16, 18, 21 , 34, the driven rotor 45 is moved again to the main rotor 77.
The movable contact 49a of the motor switch 49 is held within a certain angle range where it does not engage with the motor switch 49, and the movable contact 49a of the motor switch 49
Rotation transmission control member 4 held on the fixed contact 49c side
6. A cassette-type tape recorder characterized by comprising the following.