JPS6113299B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording/reproducing device using a tape cassette, and its purpose is to minimize the loading and unloading of cassettes in Stahl type or slot-in type devices used in car stereo decks, etc. The aim is to make the driving force quiet and smooth.

Conventionally, a cassette is generally installed in a car stereo deck or the like by horizontally inserting the cassette through a cassette insertion opening formed on the front surface of the main body of the device.
In this case, the cassette is loaded purely mechanically, for example, in the so-called Stahl system, where when the cassette is inserted, the tape running mechanism is raised and the cassette is loaded onto the reel stand, the cassette insertion operation is controlled by a spring force. If the cassette is ejected, it has the disadvantage of requiring an excessive force for inserting the cassette, and conversely, the cassette ejecting operation utilizes the energy stored in the spring, so it makes a loud noise when ejecting the cassette. However, there are disadvantages such as the cassette falling out or the cassette popping out too quickly. In addition to the above-mentioned Stahl method, various methods of purely mechanically operating the cassette device have been considered and realized, such as the slot-in method in which the cassette itself is mechanically transferred and attached to the tape running mechanism. It is difficult to completely eliminate such drawbacks.

Therefore, in recent years, methods have been considered to utilize motor power in devices that load and eject cassettes.In this type of device, the cassette loading operation is driven by a motor, but the ejecting operation is performed using a spring during the loading operation. Efforts have been made to do this by utilizing the energy stored in etc. However, even with such a motor-driven device, it is difficult to completely eliminate drawbacks such as a complicated mechanism, cassettes popping out too quickly and loud noises when ejecting a cassette.

The present invention solves these problems at once, and uses the power of a motor to perform both the cassette loading and unloading operations, making it possible to transport cassettes with a simple mechanism and extremely high operability. This is what I am trying to do. Moreover, the present invention is intended to automatically open and close the lid that closes the cassette insertion port in accordance with the movement of the cassette, thereby preventing dust from entering the main body of the apparatus as much as possible.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a cassette used in the cassette type magnetic recording/reproducing apparatus of this embodiment, and shows a conventionally known reel-to-reel type cassette 2. As shown in FIG. In FIG. 1, 2a is a window surface (front surface) of the cassette 2, and 4 is a window for inserting a pinch roller.
FIG. 2 is a plan view showing a schematic configuration of the cassette type magnetic recording/reproducing apparatus, and FIGS. 3 to 5 are plan views showing the operation of a cassette moving claw in the same apparatus.

First, the configuration of this device will be explained with reference to FIG.
In the figure, 12 is a board of the apparatus, and on the right side of the board 12 is a cassette guide base 1 formed in a substantially L shape.
4 is fixed at a constant height position from the substrate 12. Although omitted in this figure, parts necessary for the magnetic tape device, such as a magnetic head, a pinch roller, and a capstan shaft, are arranged in the space S formed between the board 12 and the guide base 14. ing. To explain this a little, the capstan shaft is rotatably provided on a bearing provided on the base plate 12, the pinch roller is also rotatably supported by a well-known arm, and the pinch roller arm is rotatably supported on the base plate 12. Furthermore, one end of the magnetic head is connected to the substrate 12.
It is mounted on a head board rotatably supported above the board 12, and is arranged so as to be movable from the right to the left and from the left to the right of the board 12. Since such a mechanism is already widely known, further explanation will be omitted.

Next, a cassette moving member 16 is arranged on the guide base 14, and the cassette moving member 1
6 is provided with a rotation support pin 18 on its upper surface and a guide pin 20 on its lower surface. The guide pin 20 is inserted and loosely fitted into a guide groove 22 formed on the main surface of the guide base 14, as shown in FIGS.
It is connected to a cassette transfer member 24 as shown. The cassette moving member 16 is configured such that the guide pin 20 is rotatable around the rotation support pin 18 within a range limited by the guide groove 22, and the pin 18 has no play. It is constantly urged to rotate counterclockwise by a fitted torsion spring 26. Furthermore, the cassette moving member 16
A claw portion 16a provided on the side of the free end is capable of protruding into the cassette insertion path from the bent surface 14a of the guide base 14.

Next, reference numeral 28 denotes a cassette insertion completion detection piece, which is rotatably supported by a pin 30 set on the main surface of the guide base 14, and is supported by a tension spring 32 suspended between it and the guide base 14. It is rotated counterclockwise. When the cassette is inserted, the cassette insertion completion detection piece 28 is pushed against the side of the cassette and rotated clockwise, pushing and moving the actuator 34a of the cassette insertion completion detection switch 34 fixed to the guide base 14. The switch 34 is changed over.

The cassette transfer member 24 is suspended between the bent portion 12a of the base plate 12 and the bent portion 14a of the guide base 14. The cassette transfer member 24 has a guide groove 36 and a guide groove 38 formed parallel to each other on its side surface, so that the substrate 12 can be transferred to the cassette transfer member 24.
A guide pin 40 and a guide pin 42 are fitted in the bent portion 12a of the cassette moving member 16 (see FIG. 6), while the other end is fitted with the cassette moving claw member 16 as described above. A pin 18 is fitted therein. That is, when the cassette transfer member 24 slides along the side surface of the substrate 12, the cassette transfer member 16 also slides together.

Further, a cam portion 44 is provided on the back side of the side surface of the transfer member 24, and a rack 46 is formed at the lower end of the side surface, and the cam portion 44 has a first sliding surface 44a and a second sliding surface 44a. It has a moving surface 44b. Further, a pin 48 is installed at the other end of the transfer member 24 so as to project downward.
8 is a guide base 1 according to the movement of the transfer member 24.
A cassette loading completion detection switch 50 and a cassette ejection completion detection switch 52 fixed on the cartridge 4 are selectively operated.

Next, reference numeral 54 denotes a motor that can be switched between forward and reverse directions installed on the board 12.
A pulley 59 rotatably provided on the holder, a slip mechanism (not shown) consisting of a felt plate and a compression spring,
a worm 60 that has a disk portion to which the felt plate is pressed by the force of a compression spring and is rotatable on the shaft 58;
Through a deceleration mechanism constituted by a worm wheel 62 that meshes with this worm 60, a small gear 64 that is integrated with this wheel 62, a large gear 66 that meshes with this gear 64, and the rack 46,
The signal is transmitted to the cassette transfer member 24 and causes the transfer member 32 to slide. and the motor 55
By switching the direction of rotation of the cassette transfer member 3,
The sliding direction of the transfer member 3 can be changed.
2 can be moved back and forth. Note that the worm wheel 62, small gear 64 and large gear 66 are
is rotatably attached to the side surface of the substrate 12 with shafts 63 and 65.

Reference numeral 70 denotes a cassette pressing member, which is provided with two elastic pressing pieces 72, 72 on both sides of the front end, and is connected to the bent portion 12a of the board 12 and the guide base 1.
4. Pins 74 planted facing each other
and is rotatably supported by a pin 76. The cassette push-down member 70 is rotated counterclockwise by a tension spring 80 suspended between a pin 78 embedded in the side surface of the base plate 12 and a spring hook on the push-down member 70. , which is prevented from rotating by the pin 78 and is in a substantially horizontal state (see Fig. 7).
However, when the pin 82 provided on the cassette pressing member 70 rides from the first sliding surface 44a to the second sliding surface 44b of the cam portion 44 provided on the cassette transfer member 24, it is rotated clockwise to move the cassette. Press down (see Figure 8).

Next, reference numeral 84 denotes a cassette push-up member, and this cassette push-up member 84 is configured to be movable in the vertical direction with respect to the substrate 12, and is normally supported by a spring 86.
is urged upward by the force of Furthermore, the second
When the cassette is inserted in the direction of the arrow in the figure, the cassette slides between the upper surface of the cassette push-up member 84 and the push-down piece 72 of the cassette push-down member 70, which also serves as a guide for the cassette. It's summery. Reference numeral 88 denotes a lid for opening and closing the cassette insertion port, one end of which is rotatably supported by a long shaft 90.

Next, before explaining the overall operation, the operation of the cassette moving member 16 will be explained in advance with reference to FIGS. 2 to 5. The cassette moving member 16 is rotatable about a pin 18 in relation to the movement of the cassette transferring member 24, and FIG.
4 shows the state until it starts moving. That is, due to the biasing force of the torsion spring 26, the claw portion 16a of the cassette moving member 16 protrudes into the cassette insertion path. Note that before the cassette 2 is inserted, the claw portion 16a protrudes until the pin 20 comes into contact with the periphery of the guide groove 22, and after being pushed back by the periphery of the pin 20 when the cassette 2 is inserted. Figure 9,
As shown in FIG. 10, it is fitted into the pinch roller insertion window 4 of the cassette 2 to position the cassette 2. At this time, when the cassette 2 is pulled out, the claw portion 16a moves along the periphery of the window portion 4 and is separated from the window portion 4, so that the cassette 2 can be easily removed.
can be pulled out. In order to smoothly insert and remove the cassette 2, the claw portion 16a is provided with tapered portions 92 and 94 as shown in FIG.

FIG. 3 shows a state in which the cassette transfer member 24 has moved forward (moved to the left in the figure) to near the end due to the rotation of the motor, and the cassette 2 is moved integrally with the cassette transfer member 16.

Next, FIG. 4 shows a state in which the cassette transfer member 24 has moved further forward than in the case of FIG.
The claw portion 16a of the cassette moving member 16 gradually moves away from the window portion 4 of the cassette 2 as it comes into contact with and slides toward the sliding surface 22b.

FIG. 5 shows a state in which the cassette transfer member 24 has moved further forward than in the case of FIG. 16
The claw portion 16a is separated from the front surface of the cassette 2 and is held in a position where it does not inhibit the vertical movement of the cassette 2.

The above is an explanation of the general configuration of this device. Next, the overall operation of this device will be explained in Figs.
The explanation will be centered on Figure 0. First of all, Fig. 2 is a plan view showing the state in which the insertion of the cassette into the device has been completed, indicated by a dashed line, Fig. 6 is a side view showing the state in which the horizontal transfer of the cassette has been completed, and Fig. 7 is a side view with the same part cut away. 8 are plan views showing a state in which the cassette has been completely installed.

The tape cassette 2 shown in FIG. 1 is shown in FIG.
a. It is inserted into the opening space formed by the bent portion 12a of the substrate 12 and the cassette push-up member 84 by pushing open the lid 88 in the direction shown by the arrow in FIG. At this time, the cassette 2 is inserted so that the surface of the window portion 4 faces the guide base 14 side. Misinsertion can be prevented by setting the shape of the cassette insertion opening 98 provided on the front panel 96 of the apparatus to match the shape of the cassette 2 when viewed from the side. That is, even if an attempt is made to insert the cassette 2 with the surface of the window portion 4 facing the bent portion 12a of the board 12, the cassette insertion slot 98 will not accept it. Further, when the cassette 2 is inserted to the position shown by the solid line in FIG. 2, the claw portion 16a of the cassette moving member 16 enters the window portion 4 of the cassette 2 by the force of the spring 26, and the cassette 2 is positioned. As mentioned earlier, the claw portion 16a is provided with tapered portions 92 and 94 as shown in FIG. 9, so that the cassette 2 can be freely pulled out from the above-mentioned positioning state and further pushed in.

Then, when the cassette 2 is further pushed forward from the position shown by the solid line in FIG. One end 28a of the piece 28 is pushed by the side surface of the cassette 2, and the piece 28 is rotated clockwise against the force of the spring 32, and the other end 28b also switches the cassette insertion completion detection switch 34. When the cassette insertion completion detection switch 34 is switched, the motor control circuit 100 shown in FIG. 11 is activated, and the motor 54 is brought into a normal rotation state. The normal rotation of the motor 54 causes the cassette transfer member 24 to move forward from the position shown in FIG. 2, and the cassette transfer member 16 also moves forward at the same time. And the claw portion 16 of the cassette moving member 16
a is again the pinch roller insertion window 4 of the cassette 2.
The cassette 2 is horizontally transferred together with the transfer member 24 and the moving member 16.

6 and 7 show a state in which the horizontal transfer of the cassette 2 is completed, and the cassette transfer member 24 continues to move further to the left from this position. When the transfer member 24 moves slightly forward from the position shown in FIG. 6, the cassette moving member 16 is rotated clockwise as explained in FIG. As a result, the claw portion 16a of the cassette moving member 16 is separated from the window surface of the cassette 2. Along with this, a pin 82 provided on the cassette pressing member 70
However, as shown in FIG. 8, from the first cam surface 44a of the cam portion 44 provided on the side surface of the cassette transfer member 24,
It slides toward the second cam surface 44b, causing the cassette pressing member 70 to rotate clockwise against the biasing force of the tension spring 80. With this, cassette 2
is pushed by the push-down piece 72 of the cassette push-down member 70, is transferred vertically downward against the push-up force of the cassette push-up member 84, and is mounted on a reel stand (not shown).
FIG. 8 shows this cassette mounting state. When the transfer member 24 moves to the position shown in FIG.
to stop the motor 54. At the same time,
The head and pinch roller (not shown) are attached to the cassette 2.
The tape is run at a constant speed and a playback operation is performed. Also, at this time, the cassette transfer member 24
The positioning is done using worm 60 and worm wheel 6.
This is done by interlocking with 2.

The cassette loading operation has been described above, and the cassette ejecting operation will now be described. When the cassette eject operation switch 102 located on the front panel (not shown) of the main body of the apparatus, the so-called eject switch (see FIG. 11) is activated, or when the tape has been played back and forth one time and the detection circuit is activated, The motor control circuit 100 causes the motor 54 to begin reversing. As a result, the cassette is ejected by performing an operation completely opposite to the above-described cassette mounting and operation. That is, the cassette transfer member 24 begins to move backward from the position shown in FIG. 8 to the right in the drawing under the reversal rotational force of the motor 54, and in conjunction with this, the pin 82 of the cassette pressing member 70 moves to the position shown in FIG. From the cam surface 44b to the cam surface 4
4a, and is rotated counterclockwise by the biasing force of the tension spring 80, so that the pressing piece 72 tends to separate from the upper surface of the cassette 2. As a result, the cassette 2 is moved vertically upward by the pushing up force of the compression coil spring 86 of the cassette pushing up member 84. FIGS. 6 and 7, which show the state in which the horizontal cassette transfer is completed, are also diagrams showing the state in which the cassette has been raised completely during the ejection operation just described. Needless to say, when the cassette is raised, the claw 16a of the cassette moving member 16 does not enter the window 4 of the cassette 2, but the claw 16a enters the opening 4 of the cassette 2 around the time the cassette is raised. The entry is followed by a horizontal transfer movement of the cassette. This horizontal transfer operation of the cassette 2 is performed by moving the cassette transfer member 24 backward.

FIG. 2 also shows a state in which the ejection of the cassette 2 is completed, and the claw portion 16 of the cassette moving member 16
a remains inserted into the window 4 of the cassette 2. This eliminates the risk of the cassette 2 slipping into the device even if the device is installed at an angle. When the cassette is completely ejected, the pin 48 of the cassette transfer member 24 switches the cassette ejection completion switch 52 to stop the rotation of the motor 54. At this time, the cassette transfer member 24 is positioned by the worm 6.
This is done by meshing the worm wheel 62 with the worm wheel 62. As is clear from a comparison between FIG. 3 and FIG. 11, the cassette insertion completion position and the ejection completion position are the same in terms of the device state,
The position of is different. That is, when inserting the cassette 2, the cassette insertion completion detection switch 34 is activated by inserting the cassette 2 relatively far into the device, and the loading operation is performed, but when the cassette 2 is ejected, the cassette 2 reaches a position relatively protruding from the front of the device. The cassette 2 is moved so that the cassette 2 can be easily pulled out.

Note that as shown in FIG. 9, the cassette moving member 16
The claw portion 16a has a tapered portion 94a connected to the tapered portion 94 and a step portion 92 connected to the tapered portion 92.
When the cassette 2 is moved forward, the recessed portion between the tapered portions 94 and 94a touches one side edge of the window 4 of the cassette 2, and the cassette 2 is moved forward, and when the cassette 2 is moved backward, the above step is moved. Part 92
a hits the other side edge of the window 4 and causes the cassette 2 to move backward.

Further, in this embodiment, the cassette is transferred using the cassette transfer member 16, but other methods such as using rubber rollers are also effective.

The basic operation of the apparatus of this embodiment has been described above. Next, the operation of the lid 88 will be explained using FIGS. 12 and 13. This lid closes the cassette insertion port 98 before the cassette is inserted, but it is forcibly opened during the process of inserting the cassette and being automatically transferred for loading, and automatically closes when the cassette is loaded. When the cassette returns to the position and is automatically transferred for ejection, it is forcibly opened again, and when the cassette reaches the ejection completion position and is pulled out, it automatically returns to the closed position again. .

That is, as shown in FIG.
06 is rotatably provided. This lever 1
One end 106a of the cover 88 is opposed to the left end of the front surface of the lid 88. The other end 106b of this lever 106 is rotatably connected via a rod 108 to one end of a rotating lever 110 via a shaft 112. This rotary lever 110 is attached to the base plate 12 with a shaft 114.
It is rotatably attached to the bending part of. A pin 116 is protruded inward from the side surface of the head transfer member 24 so as to be engageable with the other end of the rotating lever 110. The rod 108 above is pin 40
It is biased in the direction of the arrow by a tension spring 118 suspended between. The biasing force of the spring 118 causes the lever 106 to rotate counterclockwise and the lid body 88 to rotate.
Acts as a force to force the opening.

In the above embodiment, in the state before the cassette is inserted, the pin 11 provided on the side surface of the cassette transfer member 24
6 comes into contact with the lever 106 and prevents the lever 106 from rotating counterclockwise by the spring 118, so the lid body 88 is in a closed state. In this state, when the lid 88 is pushed open with the cassette to insert the cassette and the cassette transfer member 24 starts moving, the pin 116 separates from the lever 106, so the lever 106 is moved by the force of the spring 118 as shown in FIG. The cover member 88 is rotated counterclockwise by the user, and the cover member 88 is forcibly opened using one end 106a thereof. When the cassette is installed, the pin 116 rotates the lever 110 clockwise, and the lever 106 is rotated clockwise to return to the position shown in FIG. It is in the closed position again.

On the other hand, when the cassette ejection operation starts, the pin 1
16 leaves the lever 110, the lid 88 is forcibly opened again as shown in FIG. 13, and the cassette 2 is ejected without being disturbed by the lid 88. At the discharge completion position, the pin 116 is connected to the lever 1 again.
06 and is held in the position shown in Fig. 12,
When the cassette is pulled out, the lid 88 is automatically closed.

As explained above, the magnetic recording/reproducing apparatus of the present invention uses motor power to perform both the cassette loading operation and the ejecting operation, so it is extremely easy to operate, does not make a loud noise when ejecting the cassette, and Since the cassette loading and unloading operations are performed by switching the rotational direction of the motor, the cassette transfer means can simply perform reciprocating motion, making the structure simple. The lid that closes the cassette insertion slot is forcibly opened when the cassette is loaded, and the lid is automatically closed when the cassette is installed, effectively preventing dust from entering the device without interfering with cassette transfer. It exhibits various effects such as prevention.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a cassette used in a magnetic recording/reproducing device according to an embodiment of the present invention, FIG. 2 is a plan view showing a schematic configuration of the device, and FIGS. 3 to 5 are cassette moving members of the device. 6 to 8 are side views of essential parts to explain the operation of the device, and FIG. 9 is a diagram illustrating the engagement relationship between the cassette moving member and the cassette. 10 is a front view thereof, FIG. 11 is a block diagram of the motor control circuit, and FIGS. 12 and 13 are perspective views illustrating the operation of the lid for opening and closing the cassette insertion slot. 2...cassette, 4...cassette window, 14...
...Guide base, 16...Cassette moving member, 16a
...Claw portion, 24...Cassette transfer member, 54...
Motor, 70...Cassette pushing member, 84...Cassette pushing member, 88...Lid body, 100...Motor control circuit, 106...Lid opening lever, 108
... Rod, 110 ... Rotating lever, 118 ...
Spring.

Claims (1)

[Claims] 1 Between the first position where the cassette can be inserted into and removed from the cassette insertion slot and the second position where the cassette is attached to the reel stand, a cassette transfer means that performs reciprocating motion to transfer the cassette to position 1; a motor that can be switched between forward and reverse directions for reciprocating the cassette transfer means; a lid body that opens and closes the cassette insertion opening; An opening/closing means is provided for opening and closing the lid in conjunction with the operation of the cassette transfer means, and when the cassette is transferred from the first position to the second position, the motor is rotated in the normal direction to move the cassette from the second position. A magnetic recording/reproducing device characterized in that when the cassette is transferred to the first position, the motor is reversed to drive the cassette transfer means, and the lid is opened and closed so as not to impede the transfer of the cassette. Device.