JPH05982Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a cassette attachment/detachment device for a tape recorder that prevents the cassette holder from wobbling when no cassette is loaded in a cassette type tape recorder.

[Conventional technology]

Figures 4 to 13 show the schematic structure of a cassette tape recorder that was previously developed by the inventors of the present invention, which was filed as Japanese Patent Application No. 15676-1982.
This is already publicly known.

That is, FIG. 4 is a plan view in a stopped state, and each pair of reel shafts 2 are placed on the upper surface side of the main board 1.
a, 2b, capstans 3a, 3b, and a tape drive mechanism including a motor 4 for rotationally driving these. Motor 4 has both capstan shafts 3
a, 3b are simultaneously rotated in their respective tape feeding directions, and a pair of reel shafts 2a, 2b are alternatively rotated 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, 6b corresponding to the respective capstan shafts 3a, 3b are mounted.

Furthermore, a rotating plate 8 is provided on the upper surface of the main board 1 and is rotatable in the vertical direction (direction perpendicular to the paper plane of FIG. 4) about the upper edge in FIG. A cassette holder 9 is also supported at the rotating end so as to be rotatable in the vertical direction (direction perpendicular to the paper plane of FIG. 4) (see FIGS. 8 and 9).
The connection structure between the rotating plate 8 and the cassette holder 9 is as shown in FIG. Hook-shaped bent part 9
b is engaged from above the tip 8b of the rotary plate 8. That is, the cassette holder 9 is rotatably connected to the distal end of the rotary plate 8 by concave-convex fitting.

The amount of upward rotation of the rotating plate 8 is regulated by a bent piece 10 formed at the upper part of the side wall of the main board 1, and the presence of this bent piece 10 allows the rotating plate 8 and the cassette holder 9 to move upward. Main board 1 after moving
is held almost parallel to the

The cassette holder 9 has a cassette insertion/ejection opening 11 on the lower end side in FIG. The cassette 12 can be inserted and removed. Then, with the tape cassette 12 inserted into the cassette holder 9, the rotating plate 8 rotates downward as shown in FIG. , the tape cassette 12 is connected to the reel shaft 2.
a, 2b and capstan shafts 3a, 3b.

When the cassette holder 9 moves from the cassette insertion/removal position to the cassette loading position, the magnetic head 5 moves to the left in FIG. Contact with magnetic tape. Furthermore, in conjunction with the movement of the magnetic head 5 into the tape cassette 12, the pinch roller on the same side as the reel shaft driven by the motor 4 connects the magnetic tape to the corresponding capstan shaft. Press it. For example, when the reel shaft 2b is driven, the pinch roller 6b comes into pressure contact with the capstan shaft 3b via the magnetic tape. In this way, the magnetic tape is driven to travel in one direction, and recording or reproducing operations are performed.

A spring receiving member 13 is rotatably mounted on the upper surface of the rotating plate 8 by having one end pivotally supported by a shaft 14 . Further, an eject member 15 is attached to the rotary plate 8 and is slidable in the insertion/removal direction of the tape cassette 12 (vertical direction in FIG. 4).

This eject member 15 is as shown in FIG.
It has a contact part 16 at one end (the upper end in FIG. 4) against which the tape cassette 12 inserted into the cassette holder 9 comes into contact, and is connected to one reel hub hole of the tape cassette 12 inserted into the cassette holder 9. It has an engaging claw part 17 at the other end, and further has a protruding part 19 that comes into contact with a bulge part 18 formed on the rotating end edge of the rotating plate 8 to restrict the amount of movement of the cassette in the pushing back direction. It has on the top surface.

On the other hand, the spring receiving member 13 is arranged with its rotational end facing the ejecting member 15 side. An eject spring 20 made of a deployment spring is stretched between the eject member 15 and the rotating end of the spring receiving member 13.

Further, a spring receiving member 13 is provided on the lower surface side of the rotating plate 8.
A plate-shaped locking member 21 is rotatably mounted on a common shaft 14. This locking member 21
selectively engages with the contact piece 22 located on the line of motion of the eject member 15 and the rising piece 23 of the main board 1 (see FIG. 9) to lock the cassette holder 9 at the cassette insertion/removal position. The main board 1 has a locking portion 24, and is always urged to rotate in a direction in which the locking portion 24 is locked to the upper edge of the side plate of the main board 1 by a spring (not shown).

As shown in FIGS. 10 and 11, an eject operation member 25 is attached to the outer surface of the side plate of the main board 1 so as to be movable back and forth in the left and right directions in the figures. The eject operating member 25 has an engaging portion 26 formed in a bent position at its tip, and is connected to the spring receiving member 13 via a connecting rod 27. Moreover, this eject operation member 25 is always urged rightward in FIG. 10 by a return spring 28. When the eject operation member 25 is moved to the right (return direction) by the return spring 28 as shown in FIGS. 10 and 11, the spring receiving member 13
is moved in the clockwise direction (returning direction) as shown in FIGS. 4 and 5, and when the eject operation member 25 is pushed to the left against the return spring 28 as shown in FIG. At the same time, the spring receiving member 13 also rotates in the counterclockwise direction (forward direction) as shown in FIGS. 6 and 7.

Further, on the outer surface of the side plate of the main board 1, as shown in FIGS.
It is attached so that it can move forward and backward in the left and right directions in the figure. The operating force transmitting member 29 is always urged rightward by a return spring 30. As shown in FIG. 12, the operating force transmitting member 29 receives the pressing force of the eject operating member 25 at the pressure receiving portion 31 when the eject operating member 25 moves to the left.
It moves to the left together with the eject operation member 25. Further, the operating force transmitting member 29 has an engaging piece 33.
is formed by bending.

Furthermore, a plate-shaped interlocking member 34 is rotatably mounted on the outer surface of the side plate of the main board 1 at a position in front of the eject operation member 25 and the operation force transmission member 29 (left position in FIG. 10). has been done. This interlocking member 34 has a connecting pin 37 that engages with a long groove 36 provided in the side plate portion of the rotating plate 8, and abuts on the engaging portion 26 of the eject operation member 25 from the right side in FIG. A pressure receiving piece 38 that receives a pressing force and engaging protrusions 39 and 40 located before and after the engaging piece 33 of the operating force transmitting member 29
The cassette presser spring 41 constantly presses the cassette.
It is urged to rotate in the counterclockwise direction in FIG.

Next, the operation will be explained. FIGS. 4, 8, and 10 show the state when the cassette is not loaded. In this state, the eject member 15 is moved in the tape cassette ejecting direction by the elasticity of the eject spring 20. Further, the cassette holder 9 is at a stop position spaced apart from the main board 1, and the locking member 2
The locking portion 24 of the main board 1 engages with the rising piece 23 of the main board 1, and prevents the cassette holder 9 from moving to the operating position. Furthermore, the spring receiving member 13 receives the elastic force of the return spring 28 via the connecting rod 27 and the eject operation member 25, and therefore moves in the backward movement direction (the direction in which the eject spring 20 is loaded). On the other hand, the operating force transmission member 29 has its engagement piece 33 in contact with the engagement protrusion 40 of the interlocking member 34, and the return operation by the return spring 30 is prohibited.

Note that the interlocking member 34 receives the elasticity of the return spring 30 and the cassette pressing spring 41, and is biased to rotate in the direction of moving the cassette holder 9 to the operating position due to the engagement between the long groove 36 and the connecting pin 37.
Rotation in that direction is prohibited by engagement between the rising piece 23 and the locking portion 24 (see FIG. 4).

Now, place the tape cassette 12 in the cassette holder 9 in the longitudinal direction from the cassette insertion/ejection opening 11, and
When inserted in a state substantially parallel to the main board 1, the engaging claw portion 17 of the eject member 15 first engages with the reel hub hole of the tape cassette 12. Subsequently, the tape cassette 12 presses the contact portion 16 of the eject member 15 located on the insertion line of the tape cassette 12, and the eject member 15 moves forward against the eject spring 20.

Then, as the eject member 15 moves forward,
The amount of elastic deformation of the eject spring 20 gradually increases,
When the amount of elastic deformation exceeds the maximum position, the elastic force of the eject spring 20 acts to move the eject member 15 in the forward direction.
Therefore, no force is required to push the tape cassette 12, and the tape cassette 12 is drawn into the cassette holder 9 by the elastic force of the eject spring 20.

Subsequently, the eject member 15 contacts the contact piece 22 of the locking member 21 and rotates the locking member 21 in the opposite direction. As a result, the locking portion 24 of the locking member 21 is disengaged from the rising piece 23 of the main board 1 (the fifth
), the rotating plate 8 and the interlocking member 34 rotate downward under the elastic force of the return spring 30 and the cassette pressing spring 41, and the cassette holder 9 also descends to move the tape cassette 12 onto the reel shafts 2a, 2b. and engages with the capstan shafts 3a and 3b (9th
(see figure).

5, 9 and 11 show the cassette loaded condition, ie, the cassette holder 12 is in the operating position. In this state, the interlocking member 3
4, the engagement piece 33 of the operating force transmission member 29
is removed from the engagement protrusion 40, and the operating force transmission member 29 is returned to its original position by the return spring 30.

Furthermore, the engaging portion 26 of the eject operation member 25
presses the pressure receiving piece 38 of the interlocking member 34 by the elastic force of the return spring 28, and this pressing force is applied to the interlocking member 34.
This acts to rotate the motor in the counterclockwise direction as shown in FIG.

On the other hand, the elastic force of the eject spring 20 is
7 to the eject operating member 25, this elastic force also acts on the eject operating member 25 in the right direction like the return spring 28, and further acts on the interlocking member 34 in the counterclockwise direction. .

Further, in connection with the movement of the cassette holder 9 to the operating position, the motor 4 is started, and one reel shaft, for example, the reel shaft 2b, and both capstan shafts 3a, 3b start rotating in a predetermined direction. At the same time, the magnetic head 5 moves in the direction of the tape cassette 12 and comes into contact with the magnetic head, and the pinch roller 6b on the same side magnetically attaches the reel shaft receiving the rotational force of the motor 4 to the corresponding capstan shaft 3b. A recording or playback state is created by pressing the tape through the tape.

Next, in order to stop and take out the tape cassette 12, the eject operation member 25 can be pushed in as shown in FIG. In this case, the eject operation member 25 presses the pressure receiving part 31 of the operation force transmission member 29 as shown in FIG.
9 in the same direction. Then, the engagement piece 33 presses the engagement protrusion 39 of the interlocking member 34 to rotate the interlocking member 34 in the clockwise direction as shown in FIG. Therefore, the rotating plate 8 rotates in the counterclockwise direction, whereby the cassette holder 9 rises to the stop position and moves the tape cassette 12 onto the reel shaft 2.
a, 2b and capstan shafts 3a, 3b upwards.

Further, by pushing the eject operating member 25, the spring receiving member 13 rotates counterclockwise as shown in FIG. 6 via the connecting rod 27, and the eject spring 20 is reversed. Therefore, the eject member 15 moves in the cassette ejecting direction as shown in FIG. 7 under the elastic force of the eject spring 20.
The protrusion 19 comes into contact with the bulge 18 of the rotating plate 8, and pushes the tape cassette 12 back from the cassette insertion/ejection opening 11. Further, the locking member 21 returns in the clockwise direction in FIG.
Hold the cassette holder 7 at the stop position. When the eject operation member 25 is released, this member 25 is returned by the return spring 28, and as shown in FIGS.
The state shown in the figure and FIG. 10 is reached.

[Problem that the invention attempts to solve]

In the conventional device described above, the cassette holder 9 is rotatably supported on the rotating edge of the rotating plate 8 by concave-convex fitting, so when the device is used as a car stereo, for example, the cassette holder 9 can be moved freely. In the loaded state, the cassette holder 9 wobbles due to the vibrations of the automobile and collides with adjacent members, producing a rattling sound. Also, when this device is used as a portable device, similar sounds are generated due to external vibrations. Such abnormal sounds are not only unpleasant, but can also be mistaken for malfunctions, posing a major practical problem.

Therefore, the purpose of the present invention is to prevent external vibrations from occurring when no tape cassette is loaded in a tape recorder in which a cassette holder is rotatably supported by a concave-convex fit on the rotating edge of a rotating plate. To provide a cassette attachment/detachment device in which a cassette holder does not wobble even when subjected to a cassette holder and does not generate abnormal noise.

[Means for solving problems]

In order to achieve the above object, the present invention has a part of the ejection member which is pushed by the tape cassette when it is inserted into the cassette holder and pushes the tape cassette back in the ejecting direction when it moves in the opposite direction. The present invention is characterized in that a stopper protrusion is provided, and the stopper protrusion is brought into contact with the cassette holder to limit the amount of movement of the eject member in the tape cassette removal direction.

[Effect]

In the tape recorder cassette attachment/detachment device according to the present invention, when the cassette is not loaded, the stopper protrusion provided on a part of the eject member comes into contact with the cassette holder, and the restoring force of the eject spring applies a biasing force to the cassette holder. Since the cassette holder is prevented from rotating, the cassette holder is held in a stable state.

[Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. To explain only the differences from the conventional device described using FIGS. 4 to 13, first, the abutting portion 16 of the ejecting member 15 is extended laterally to form an abutting piece 42. On the other hand, a stopper portion 43 is provided on the cassette holder 9 side, with which the abutting piece 42 comes into contact when the eject member 15 moves in the tape cassette ejecting direction. This stopper portion 43 is for restricting the amount of movement of the eject member 15 in the tape cassette ejecting direction. That is, when the cassette is not loaded, the protrusion 19 of the eject member 15 does not come into contact with the protrusion 18 of the rotating plate 8 (the third
(see figure), instead, the stopper portion 43 limits the amount of movement of the eject member 15 in the tape cassette ejecting direction.

According to such a configuration, the tape cassette 12
When the tape cassette is not loaded, as shown in FIG. 2, the contact piece 42 extending to the side of the contact portion 16 of the eject member 15 acts as an eject spring that urges the eject member 15 in the tape cassette ejecting direction. The elastic force of 20 abuts against a stopper portion 43 provided on the cassette holder 9, thereby suppressing rotation of the cassette holder 9. Therefore, unlike the conventional device, the cassette holder 9 does not wobble due to external vibrations, and abnormal noises are prevented from occurring.

[Effect of idea]

According to the present invention, the cassette holder does not wobble when the cassette is not loaded, and it is possible to prevent the generation of unpleasant abnormal sounds. Further, since the eject member and the eject spring have the function of suppressing rotation of the cassette holder in addition to their original functions, the above-mentioned effects can be achieved without complicating the structure.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of the main parts of a tape recorder according to an embodiment of the present invention, FIG. 2 is a plan view of the same tape recorder with no cassette loaded, and FIG. 3 is a line A-A in FIG. 2. The cross-sectional views taken in the direction of arrows and FIGS. 4 to 13 are for explaining a conventional tape recorder. FIG. 4 is a plan view without a cassette loaded, and FIG. 5 is a plan view in a recording or playback state. , FIG. 6 and FIG. 7 are plan views when the tape cassette is taken out, FIG. 8 is a cross-sectional view taken along the line B-B in FIG. 4, and FIG. 9 is a cross-sectional view taken along the line E-E in FIG. Figure 10 is a view taken along the line C-C in Figure 4, Figure 11 is a view taken along line F-F in Figure 5, and Figure 12 is a view taken along the line F-F in Figure 5.
The figure is a sectional view taken along the line GG in FIG. 7, and FIG. 13 is a sectional view taken along the line DD in FIG. 4. 1...Main board, 2...Reel shaft, 3a, 3b...
... Capstan shaft, 4 ... Motor, 5 ... Magnetic head, 6a, 6b ... Pinch roller, 8 ... Rotating plate, 9 ... Cassette holder, 10 ... Bending piece, 1
DESCRIPTION OF SYMBOLS 1...Cassette insertion/removal port, 12...Tape cassette, 13...Spring receiving member, 15...Eject member, 16...Abutting part, 17...Engaging claw part, 18
...Bulging portion, 19... Protrusion, 20... Eject spring, 21... Locking member, 22... Contact piece, 2
3... Standing piece, 24... Locking portion, 25... Eject operation member, 26... Engaging portion, 27... Connecting rod, 28... Return spring, 29... Operating force transmission member, 30... Return spring, 31...Pressure receiving part, 33...
...Engagement piece, 34...Interlocking member, 36...Groove, 37
... Connecting pin, 38 ... Pressure receiving piece, 39, 40 ...
Engagement protrusion, 41...cassette presser, 42...
Contact piece, 43... stopper part.

Claims (1)

[Scope of utility model registration request] A main board equipped with a drive mechanism including a reel shaft and a capstan shaft, and a part of which has a fixed locking part;
A rotary plate is rotatably supported at one end by the main board, and a tape cassette is rotatably supported by the rotatable end of the rotary plate, and the tape cassette is held as the rotary plate rotates. a cassette holder that reciprocates between an operating position where the tape cassette is attached to the reel shaft and the capstan shaft and a stop position where the tape cassette is detached axially upward from the reel shaft and the capstan shaft; a biasing mechanism including a spring that constantly biases the cassette in the direction of the operating position; a locking member that prohibits movement of the holder from a stop position to an operating position and releases the prohibition by rotating in the other direction; an eject member that moves backward as the tape cassette is inserted into the holder to rotate the locking member in the other direction, and moves forward as the eject operation is performed to push back the tape cassette in the cassette holder in the ejecting direction; In the cassette attachment/detachment device for a tape recorder, the device includes an eject spring that biases the eject member in the tape cassette ejecting direction, and the rotary end of the rotary plate and the cassette holder are connected by concave-convex fitting. A cassette attaching/detaching device for a tape recorder, characterized in that a stopper protrusion is provided in a part of the cassette, and the stopper protrusion is brought into contact with the cassette holder to limit the amount of movement of the eject member in the tape cassette ejecting direction.