JPS615470A - Cassette tape recorder - Google Patents

Abstract

PURPOSE:To miniaturize an electromagnetic plunger, by utilizing a switch operating member for strongly actuating a rotation transmission control member in cooperation with the plunger when the plunger is excited. CONSTITUTION:A change-over switch 50 is turned on by the turning of a switch operating member accompanying the returning motion of an operating force transmitting member and a motor 4 is actuated. At the same time, an elctromagnetic plunger 43 is excited and a rotation transmission control member is driven by the plunger and turns counterclockwise. At this moment, the engaging section of the switch operating member is engaged with the engaging section of the rotation transmission control member and the switch operating member surely turns the rotation transmission control member in cooperation with the plunger 46.

Description

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

[Technical Background of the Invention and Problems Therewith] It is extremely preferable to eject a tape cassette using the rotational force of a motor from the viewpoint of reducing the operating force. However, when the ejecting operation is performed using the rotational force of the motor, there is a problem that an operation to stop the motor must be performed one more time after the ejecting operation. Furthermore, when an electromagnetic plunger is used as part of the means for automatically performing the ejection operation, it is desirable that the electromagnetic plunger be as small as possible.

[Object of the invention] The present invention was made based on the above circumstances, and
The purpose of this is to make it possible to eject the tape cassette using the rotational force of the tape drive motor, and also to stop the motor before the eject operation is completed, thereby eliminating the trouble of double operation. Another object of the present invention is to provide a cassette tape recorder in which an electromagnetic plunger used as a part of means for automatically performing an eject operation can be made small.

[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, and a first cassette holder that is movable between a cassette loading position and a cassette discharging position. A motor switch has a second fixed contact and a movable contact that selectively contacts each fixed contact, and the movable contact is biased toward the first fixed contact by a spring force, and one pole is connected to one of the power sources. a tape running drive motor connected to a terminal via a first fixed contact and a movable contact of the motor switch, and the other pole connected to the other terminal of a power source; a second fixed contact of the motor switch and a power source; has a changeover switch inserted between one terminal of When the changeover switch is in the OFF state, a switch operating member that holds the changeover switch in the OFF state is connected between the second fixed contact of the motor switch and the other terminal of the power source through an eject switch that is always held in the ON state. an electromagnetic plunger, an eject operating member that turns the eject switch into an OFF state by manual operation, a main rotating body that is constantly rotationally driven by the motor, and a main rotating body that engages with the main rotating body. When the motor switch is at a fixed first rest position, the movable contact of the motor switch is held at the second fixed contact side, and the driven rotor rotates by receiving the rotational force by engaging with the main drive rotor; an eject mechanism that is actuated by the rotational force of a driven rotating body to move the cassette holder from a cassette loading position to a cassette ejecting position; and an engaged part that engages with the retaining part of the switch operating member, holds the driven rotating body in the first rest position where it does not engage with the driving rotating body, and holds the movable contact of the motor switch on the second fixed contact side, and moves the cassette holder from a cassette loading position to a cassette discharging position. When the cassette holder moves, the engaged portion is pressed by the engaging portion of the switch operating member that moves, and is displaced by the driving force of the electromagnetic plunger to once release the driven rotating body. Immediately before engaging with the driving rotating body, the movable contact of the motor switch is held at a second rest position where it does not engage with the driving rotating body, and then the movable contact of the motor switch is returned to the first fixed contact side by de-energizing the electromagnetic plunger, and the movable contact of the motor switch is returned to the first fixed contact side. The invention is characterized by comprising a rotation transmission control member that opens the driven rotary body again to engage with the driving rotary body and holds the driven rotary body again at the first rest position after the ejection mechanism is activated. .

[Embodiments of the invention] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a plan view, and on the upper surface side of the main board 1,
Each pair of □ reel shafts 2a, 2b, capstan shaft 3. a
, 3b and a tape drive mechanism including a motor 4 for rotating them. The motor 4 simultaneously rotates both capstan shafts 3a and sb in their respective tape feeding directions, and alternatively rotates the pair of reel shafts 3a and 3b in their respective tape winding directions.

In addition, a magnetic head 5 for recording and playback is provided on the top surface of the main board 1.
A corresponding pinch roller '6a, 6b is attached to each capstan shaft 3a, 3b.

Further, a cassette holder 7 is attached to the upper surface of the main board 1. This cassette holder 7 consists of a rotary plate 8 that allows a person to move freely in the vertical direction (direction perpendicular to the plane of the paper) about the left edge of FIG. The cassette inserter 9 is rotatably supported in the perpendicular direction). Note that the amount of upward rotation of the rotating plate 8 is regulated by a stopper 10 formed on the upper side wall of the main board 1, and due to the presence of this stopper 10, the rotating plate 8 and the cassette insert 9 are moved upward. By the way, it is held substantially parallel to the main substrate 1.

The cassette inserter 9 has a cassette insertion/ejection port 11 on the right end side in FIG. Then, by rotating the rotary plate 8 downward with the tape cassette 12 inserted into the cassette inserter 9, the tape cassette 12 is attached to the reel shafts 2a, 2b and capstan shafts 3a, 3b. loaded. 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 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 loading position to the cassette loading position, the magnetic head 5 moves downward in FIG.
2 and comes into contact with the internal magnetic tape. Moreover, in this way, the magnetic head 5 is connected to the tape cassette 12.
When the reel shaft is inserted into the reel, the pinch roller on the same side as the reel shaft driven by the motor 4 comes into pressure contact with the capstan shaft on the same side. 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 i3, 14 are arranged above the magnetic head 5 so as to overlap each other, and are freely movable back and forth in the left and right directions in the figure.

Further, they are constantly biased toward 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 bearing member 15 is provided on the upper surface of the rotating plate 8, and one end is connected to the shaft 1.
5a and is rotatably mounted.

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 has its rotating end connected to the ejecting member 16.
The amount of rotation is regulated by an arcuate hole 17 arranged toward the side and provided in the rotation plate 8. An eject spring 18 made of a deployment spring is stretched between the eject member 16 and one end of the spring receiving member 15.

The eject spring 18 has one end (the left end in FIG. 1).
, the tape cassette 1 is pushed into the cassette inserter 9.
2, and the other end has a contact portion 19 for contacting the cassettes 1 to 1.
It has an engaging claw portion 20 that engages with one reel hub hole of the tape cassette 12 inserted into the inserter 9.

Further, a plate-shaped locking member 21 is rotatably mounted on the lower surface of the rotating plate 8 coaxially with the spring receiving member 15. This locking member 21 includes a contact piece 22 located on the line of motion of the ejecting member 16, and a locking member 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. part 23, and by the tension spring 23a,
The locking portion 23 is constantly urged to rotate in a direction in which the locking portion 23 is locked to the upper edge of the steel plate of the main board 1.

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 the 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 transmitting 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. Moreover, this pressing force transmission member 25 is a return spring 2 made of a tension spring.
8, it is always urged to the right. As shown in FIGS. 1 and 2, this pressing force transmission member 25 is connected to the return spring 2.
8, when moving to the right (return direction), the spring receiving member 15 is moved to the right (II!!!) as shown in FIG.
When the member 25 is moved to the left against the return spring 28, the spring receiving member 1.5 is also rotated to the left (forward direction) at the same time. Become.

Roughly speaking, a plate-shaped operating force transmitting member 29 is attached to the outer surface of the side plate of the main board 1 at a position below the pressing force transmitting member 25 so as to be movable in the left-right direction in FIG. The operating force transmitting member 29 is always urged rightward by a return spring 30 made of a tension spring. Operation transmission member 29
When the pressing force transmitting member 25 moves to the left, the pressing force of the pressing force transmitting member 25 is received by the pressure receiving portion 31 and moves to the left together with the pressing force transmitting member 25. The operating force transmission member 29 has a switch operating piece 32 and a bent engagement piece 33, and the switch operating piece 32 switches between a tape recorder and a radio (not shown) attached thereto. The changeover switch 50 (this changeover switch 50 is one of the components of the eject operation unit 24, and the details 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 is switched to the side that enables the tape recorder to operate.

Further, on the outer surface of the side plate of the main board 1, a plate-shaped movement member 34 is provided at a position in front of the pressing force transmitting member 25 and the operating force transmitting member 29 (left position in FIG. 2), and is rotatable about a shaft 35. is installed on.

The moving member 34 constitutes an eject mechanism together with the spring receiving member 15, the ejecting member 16, the ejecting spring 18, and the locking member 21, and is provided on the side of the rotating plate 8 of the cassette holder 7. A connecting pin 37 that fits into the long groove 36, a pressure receiving piece 38 that receives the pressing force from the engaging portion 26 of the pressing force transmitting member 25, and a pressure receiving piece 38 located before and after the engaging piece 33 of the operating force transmitting member 29. It has engaging protrusions 39 and 40, and is always urged to rotate counterclockwise in FIG. 2 by a cassette retaining spring 41 made of a tension spring.

The configuration of the eject operation unit 24 is shown in FIG. That is, an electromagnetic plunger 43, 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 having an engaging portion 48a are attached to the eject operation unit board 42, and the PC A motor switch 49, a changeover switch 50, and an eject switch 51 are attached via the plate 44. Note that the eject switch 51 is originally
Although it is a normally open type, it is always kept in the on state by an eject operation member 84, which will be described later.

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, and Fig. 6 shows the eject operation unit 24.
The installation diagram is a schematic view of the part viewed from the back side).

The electromagnetic plunger 43 has a coil 52 and a movable core 53 that can move forward and backward, and the movable core 53 is always supported by a spring 5.
4 in the protruding direction, and is drawn into the coil 52 by energizing the coil 52.

The rotation transmission control section, the member 46, the power transmission member 47 and the switch operation member 48 each have a shaft 46a478.48.
It is attached to the eject operation unit board 42 via a for horizontal rotation.

The rotation transmission control member 46 is bent into a mouth shape, and the movable iron core 5 of the electromagnetic plunger 43 is attached to the tip of the upper piece.
3, and the lower piece has an engaged portion 46a that engages with the switch operating member 48a.
and a cam bin 56, a trigger locking piece 57, and a switch operation piece 58 for operating the movable contact 49a of the motor switch 49.

The power transmission member 47 is also bent into a mouth shape, and one side of the upper piece is further raised upward to form a transmission member engaging piece 59, and a cam roller 60 is rotatably mounted at the tip of the lower piece. It is pivoted.

The switch operating member 48 has a switch engaging piece 61 and a transmission member retaining piece 62 extending radially from the center of rotation together with the protruding engaging portion 48a.
The switch engagement piece 61 is engaged with the switching operation piece 50a of the changeover switch 50, and the transmission member engagement piece 62 is engaged with the operation force transmission member 29. Further, the engaging portion 48a slides into the engaged portion 46a when the switch operating member 48 rotates counterclockwise, and cooperates with the electromagnetic plunger 43 to rotate the rotation transmission control member 46 counterclockwise. This switch operating member 48 is always biased counterclockwise by a spring 63 that is stretched between the switch operating member 48 and the eject operating unit board 42, so that the changeover switch 50 is always placed on the radio side (i.e., (-) is held on the off side as a precoder.

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. Also, 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 bin 56 is provided on the periphery of the spiral cam 66 . 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. In addition, a part of the cam groove 67 has a stop position holding convex portion 6 that protrudes toward the center on the outer side edge.
8 is provided in a protruding manner, and a stop position holding convex portion 69 and a next stage position holding concave portion 70 are respectively provided on the corresponding inner side edges. Furthermore, a pressure receiving protrusion 71 is provided on the upper surface of the spiral cam 66 in a protruding manner. At the top end of this pressure receiving protrusion 71, there is an eject operation unit board 42.
One end of a torsion spring 73 held by the bent piece 72 is brought into elastic contact. Further, a tool insertion hole 74 is provided in a part of the driven rotary body 45, and the screw 42a and a tool such as a driver are inserted through this hole 74.
2a, the eject operation unit board 42 is attached to the main board 1 (see FIG. 6).Next, the motor 4, electromagnetic plunger 43, motor switch 49, changeover switch 50, and eject switch are attached. 51 etc. will be explained with reference to FIG. 7(a).

FIG. 7(a) shows a state in which the tape recorder is stopped, and one pole 4a of the motor 4 is connected to one terminal 75a of the power supply to the first fixed contact 49b of the motor switch 49 and the movable contact. 49a, and the other pole 4b of the motor 4 is connected to the other terminal 75'b of the power supply. Also, the second fixed contact 49 of the motor switch 49
The changeover switch 50 and the start switch 76 are inserted in series between the terminal 75a and one terminal 75a of the power source. Note that, for example, when this tape recorder is mounted on a vehicle and used, the start switch 76 corresponds to the engine key switch of the vehicle. The electromagnetic plunger 43 is located between the fixed contact 49c and the other pole 75b of the power source.
A coil 52 is connected via an eject switch 51.

The elastic force of a spring 54 is applied to the movable contact 49a of the motor switch 49 via the rotation transmission control member 46, so that the movable contact 49a is always urged toward the first fixed contact 49b. When the recorder is in a stopped state, it is in contact with the second fixed contact 49c due to the action of the driven rotating body 45, as will be described later.

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. 7(b).

FIG. 7(b) shows a state in which the tape recorder is stopped, corresponding to FIG.
Torque is applied in the counterclockwise direction (in the direction of the arrow). Further, the trigger locking piece 57 of the rotation transmission control member 46 engages with the stop position holding protrusion 69, thereby prohibiting the counterclockwise rotation of the driven rotary body 45. Further, a clockwise torque is applied to the rotation transmission control member 46 by a spring 54, and the clockwise rotation of the rotation transmission control member 46 is caused by the contact between the cam pin 56 and the stopper position holding convex portion 68. Prohibited by connection. Then, with the switch operation piece 58 of the rotation transmission control member 46, the movable contact 49a of the motor switch 49 is moved as shown in FIG.
) is held on the second fixed contact side. The power transmission member 47 has the cam roller 60 facing the lowest part of the spiral cam 66, and the transmission member retaining piece 59 is connected to the return spring 28 (the third (See Figure 2).

Reference numeral 77 in FIG. 7(b) denotes a main drive gear as a main drive rotating body rotatably mounted on the main board 1. This main drive gear 77
As shown in FIG. 6, the motor pulley 78 and the endless belt 7
9, it is always driven by the motor 4 via an intermediate pulley 80 and intermediate gears 81 and 82. The main drive gear 77 is in a relationship capable of meshing with the gear 64 of the driven rotor 45, but in the state shown in FIG. 77, the driven rotating body 45 is driven from the main driving gear 77.
The rotational force transmission path leading to this point has been cut off. In addition, reference numeral 83 in FIG. 6 applies the rotational force of the motor 4 to the capstan shaft 3a via the motor pulley 78.

This is an endless belt for transmitting data to 3b. Further, the rotational force of the motor 4 is transmitted to the reel shaft 2 through gears 81 and 82.
It is also selectively transmitted to a, 2 b.

Returning to FIGS. 1 and 2, the main board 1
On the outer surface of the side plate, there is an eject operation member 84 that overlaps the pressing force transmission member 25, as 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 biased toward the right in the figure by a return spring 85 stretched between it and the main board 1.
This spring force holds the eject switch 51 in the on state.

By pushing the eject operating member 84 to the left in the figure against the return spring 85, the eject switch 51 is first opened, and by further pushing the eject switch 51, the guide bin fixed to the pressing force transmitting member 25 is released. 86 to move the pressing force transmitting member 25 to the left as a unit.

Next, the operation will be explained.

1, 2, and 7(a) and 7(b) show the stopped state. In this state, the eject member 16 is returned to its original direction due to the elasticity of the eject spring 18. moving to the right). Furthermore, the cassette holder 7 is at a stop position separated from the main board 1, and the locking part 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. Furthermore, the spring bearing member 15 is a connecting rod 27.
and receives the elastic force of the return spring 28 via the pressing force transmission member 25, so that the eject spring 1 is
8). On the other hand, the operating force transmission member 29 transfers its engagement piece 33 to the engagement protrusion 4 of the movement member 34.
0, the return operation by the return spring 30 in the right direction in the figure is prohibited. And the operating force transmission member 29
At this position, the switch operating member 48 is rotated counterclockwise to keep the changeover switch 50 in the OFF state. Note that the movement member 34 is biased to rotate in the counterclockwise direction 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 eject switch 51 is held in the on state by the eject operation member 84, and 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, as shown by the imaginary line in FIG.
When the tape cassette 12 is inserted into the cassette holder 7 through the cassette insertion/ejection opening 11 with the tape cassette 12 oriented longitudinally and in a state substantially parallel to the main board 1, the eject 1 member 16 located on the insertion line of the tape cassette 12 resists the eject spring 18. and move back and forth.

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 moves the eject member 16 in the forward direction. It acts to move it to. Therefore, there is no need to force the tape cassette 12 to be pushed in, and the tape cassette 12 is drawn into the cassette holder 7 by the elastic force of the eject spring 18.

Subsequently, the ejecting member 16 touches the abutting piece 22 of the locking member 21.
, and rotates the locking member 21 against the tension spring 24. Therefore, the locking portion 23 of the locking member 21
(see Fig. 3), the rotating plate 8 and the moving member 34 of the cassette holder 7 rotate downward under the elastic force of the return spring 30 and the cassette pressing spring 41. The cassette inserter 9 is also lowered to the cassette loading position and the tape cassette 12 is moved to the reel shafts 2a and 2b.
Then, the capstan shafts 3a and 3b are loaded (see FIG. 4). Further, as the cassette insert 9 descends, the magnetic head 5 moves toward the tape cassette 12 and comes into contact with the magnetic tape.

Figures 3 and 4 (side view of Figure 3 viewed from the arrow ■ direction)
8(a) and 8(b) 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 rotation of the motion member 34 causes the engagement piece 33 of the operating force transmitting member 29 to disengage from the engaging protrusion 40, and the operating force transmitting member 29 is moved to the third position by the return spring 30.
Return to the right in the figure and FIG. 4. Then, the changeover switch 50 is turned on by the rotation of the switch operation member 48 accompanying the return operation of the operation force transmission member 29, and the motor 4 rotates as the changeover switch 50 is switched (see FIG. 8(a)). ) along with the electromagnetic plunger 4
3 is excited, and the rotation transmission control member 46 is driven by this plunger 43 and rotates slightly counterclockwise. At this time, the engaging portion 48a of the switch operating member 48 slides on the engaged portion 46a of the rotation transmission control member 46, and cooperates with the electromagnetic plunger 43 to reliably rotate the rotation transmission control member 46. Therefore, the trigger locking piece 57 of the rotation transmission control member 46 is connected to the stop position holding protrusion 69 of the driven rotary body 45.
The driven rotating body 45 comes off from the torsion spring 73.
However, before the gear "64 meshes with the main drive gear 77, the driven rotating body 45 is rotated as shown in FIG.
It is held in the second rest position shown in b). Motor 4
, one of the reel shafts 2a or 2b rotates, and both capstan shafts 3a, 3b rotate in their respective tape winding directions. Side pinch roller (6
a) presses against the corresponding capstan shaft (3a) to run the tape, thereby performing a reproducing operation. When the tape is wound to the end, a reverse mechanism (not shown) is activated to change the tape running direction, and the reproduction operation continues.

Next, when stopping and taking out the tape cassette 12, the eject operating member 84 is pushed slightly to the left in the figure against the return spring 85, and then released. At this time, the eject operation member 84 temporarily turns off the eject switch 51 as shown in FIG. 9(a), so the electromagnetic plunger 43 is de-energized and rotation transmission control is performed as shown in FIG. 9(b). The member 46 is rotated clockwise by the spring 54 to remove the cam bin 56 from the next stage position holding recess 70. 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.

Further, by the clockwise rotation of the rotation transmission control member 46, the switch operation piece 58 of this member 46 switches the movable contact 49a of the motor switch 49 to the first fixed contact 49b side as shown in FIG. 10(a).

Therefore, the motor 4 has a first fixed contact 49b and a movable contact 49b.
The rotational force of the motor 4 is transmitted to the driven rotating body 45 via the main gear 77. The rotation of the driven rotary body 45 causes the spiral cam 66 to press against the cam row 1, causing the power transmission member 47 to largely rotate counterclockwise as shown in FIG. 10(b). Therefore, the transmission member engaging piece 59 of the power transmission member 47 strongly presses the bent piece 25a of the pressing force transmission member 25, and the pressing force transmission member 25 presses the pressure receiving part 31 of the operating force transmission member 29. The operating force transmission member 29 is moved in the same direction.

Then, the changeover switch 50 is switched again to the OFF side (the side that enables the radio to operate) as shown in FIG. 4 Rotate clockwise in figure. Therefore, the rotating plate 8 rotates counterclockwise, and thereby the cassette inserter 9 rises to the cassette ejecting position, and the tape cassette 12 is pulled upward from the reel shafts 2a, 2b and capstan shafts 3a, 3b. I will put it out.

Further, due to the movement of the pressing force transmitting member 25, the spring bearing member 15 is rotated in the counterclockwise direction in FIG. 3, that is, in the forward direction in FIG. For this reason, the eject member 16 ejects the eject spring 1.
The tape cassette 12 is moved to the right in the figure under the elastic force of 8, and the tape cassette 12 is moved in the removal direction. Further, the locking member 21 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 soon comes off the spiral cam 66, but as a result, the power transmission member 47 is returned to its initial position together with the pressing force transmission member 25 by the return spring 28. Then, the cam pin 56 of the rotation transmission control member 46 rides on the stop position holding convex portion 68 of the driven rotary body 45 again, and the rotation transmission control member 46 is rotated counterclockwise against the spring 54. Switch the movable contact 49a to the second fixed contact 490 side to stop the motor 4 (
(See Figure 7(a)). At this time, the gear 6 of the driven rotor 45
4 is removed from the main rotating body 77, the pressing force of the torsion spring 73 acts on the pressure receiving protrusion 71 to rotate the driven rotating body 45 to the initial position shown in FIG. 7(b).

In the above, the eject switch 51 is temporarily turned off by lightly pushing in the eject operating member 84, thereby transmitting the rotational force of the motor 4 to the driven rotary body 45.
Although the ejecting operation is performed using the rotational force of , the same operation is performed when the starting switch 76 is turned off.

That is, in the playback operation state of FIGS. 8(a) and 8(b), the 12th
When the start switch 51 is temporarily turned off as shown in the figure, the electromagnetic plunger 43 is de-energized, and thereafter, the eject operation is performed in the same order as when the eject switch 51 is temporarily turned off. . Therefore, for example, by turning off the engine key, the tape recorder is automatically stopped and ejected.

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 in the electrical system, the eject operation member 84 is strongly pushed in to transfer the pressing force to the pressing force transmission member 25. By directly transmitting the force and moving the pressing force transmitting member 25, automatic stop and eject operations can be performed.

Further, as described above, the motor switch 49, the changeover switch 50, the electromagnetic plunger 43, and the rotation transmission control member 4
6, etc. are integrally attached to the eject operation unit board 42 to form a unit, so that it can be easily assembled by simply fixing the eject operation unit board 42 with screws 42a and 42b, and maintenance, inspection, etc. are also easy. can be done.

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 cassette type tape recorder 1 of the present invention, the tape cassette can be ejected using the rotational force of the motor for driving the tape running, and moreover, the ejecting operation can be completed immediately. The motor can also be stopped in advance, thus eliminating the trouble of double operation. Further, when the electromagnetic plunger is excited, the switch operating member cooperates with the electromagnetic plunger to powerfully operate the rotation transmission control member, so that the electromagnetic plunger can be made smaller.

[Brief explanation of drawings]

1 to 12 show an embodiment of the present invention, in which FIG. 1 is a plan view showing a stopped state, and FIG. 2 is a top view of FIG.
-■ arrow view, Figure 3 is a plan view showing the operating state, Figure 4 is a TV-IV arrow view of Figure 3, Figure 5 is an exploded perspective view of the eject operation unit, and Figure 6 is the eject operation. The installation of the unit is shown in the rear view and each figure (a) in Figures 7 to 10.
, FIG. 11 and FIG. 12 are diagrams sequentially showing the operation of the motor drive circuit, each figure (b) of FIGS. 7 to 10 is a plan view sequentially showing the operation of the peripheral part of the driven rotating body, and FIG. FIG. 7 is a plan view of a peripheral portion of a driven rotating body showing another embodiment of the present invention. 4...Motor, 7...Cassette holder, 15...
・Spring receiving member, 16... Ejection member, 18...
Eject spring, 21... Locking member, 34... Movement member, 43... Electromagnetic plunger, 45... Followed rotating body, 46... Rotation transmission control member, 46a... Engaged part , 48... Switch operating member, 48a... Engaging portion, 49... Motor switch, 49a... Movable contact,
49b... First fixed contact, 49c... Second fixed contact, 50... Changeover switch, 51... Eject switch, 54... Spring, 77... Drive gear (
main rotating body), 84... eject operation member. Applicant's representative Patent attorney Takehiko Suzue Figure 4 Figure 7 (b) Figure 8 (a) Figure 8 (b) Figure 9 (a) Figure 9 (b) Figure 10 Figure 12 Figure 13

Claims (1)

[Claims] A cassette holder that is movable between a cassette loading position and a cassette discharging position, a first fixed contact, a second fixed contact, and a movable contact that selectively contacts each fixed contact, the movable contact being on the side of the first fixed contact. A motor switch biased by a spring force, one pole connected to one terminal of a power source via a first fixed contact and a movable contact of the motor switch, and the other pole connected to the other terminal of the power source. A connected motor for driving tape running, a changeover switch inserted between a second fixed contact of the motor switch and one terminal of the power supply, and an engaging portion to move the cassette holder to the cassette loading position. a switch operating member that holds the changeover switch in the on state when the cassette holder is in the cassette release position and holds the changeover switch in the off state when the cassette holder is in the cassette release position; and the other of the second fixed contact of the motor switch and the power source. an electromagnetic plunger connected via an eject switch that is always kept on, an eject operating member that temporarily turns off the eject switch by manual operation, and an electromagnetic plunger that is connected to a terminal of When the movable contact of the motor switch is in the first rest position where it does not engage with the main drive rotating body, the movable contact of the motor switch is moved to the second position.
A driven rotary body is held on the fixed contact side and rotates by receiving the rotational force when engaged with the main drive rotary body, and the cassette holder is actuated by the rotational force of the driven rotary body to eject the cassette from the cassette loading position. an eject mechanism that moves the switch to the position, and an engaged portion that engages with the engaging portion of the switch operating member, and normally maintains the driven rotating body at the first rest position where it does not engage with the driving rotating body. and holding the movable contact of the motor switch on the second fixed contact side,
When the cassette holder moves from the cassette loading position to the cassette discharging position, the engaged part is pressed by the engaging part of the switch operating member that moves against the cassette holder, and is displaced by the driving force of the electromagnetic plunger. After the driven rotor is once released, the movable contact of the motor switch is held at a second rest position where it does not engage with the drive rotor just before it engages with the drive rotor, and then the movable contact of the motor switch is opened by de-energizing the electromagnetic plunger. rotation transmission for returning the driven rotor to the first fixed contact side and opening the driven rotor again to engage the driving rotor, and holding the driven rotor at the first rest position again after the ejection mechanism is activated. A cassette tape recorder comprising a control member.