JPS628855B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a cassette tape recorder device intended for miniaturization.

[Technical background of the invention and its problems]

Recently, cassette tape recorders are small and lightweight, making them suitable for portability, and 2-way stereo types have become popular, especially for playback using headphones, making it easy to enjoy tape playback while walking while wearing headphones. It has been made possible. Such portable cassette tape recorders for use with headphones have already been made as small as possible, and at present are approximately the same size as the cassette case that houses the tape cassette.

By the way, if a cassette tape recorder is downsized to approximately the same size as a cassette case,
What is particularly requested is an improvement in the shape and arrangement of the controls for putting the cassette tape recorder into various operating states such as playback, fast forwarding, rewinding, etc., as well as the stop state, to further improve operability and ease of use. That is to say. That is, the controls of conventional small cassette tape recorders are small in proportion to the main body of the cassette tape recorder, and are concentrated in one place due to the relationship with the tape recorder mechanism. Naturally, it is difficult to operate and is prone to erroneous operation. Therefore, conventionally, the cassette tape recorder itself has been downsized to approximately the same size as the cassette case, but the shape and arrangement of the controls have been made large enough for the user to easily operate them. There is a strong desire to develop a compact cassette tape recorder that is not only convenient to carry, but also has excellent operability and is free from malfunctions, with the spacing being wide and loose enough to prevent even children from accidentally operating it. There is.

[Purpose of the invention]

This invention was made based on the above circumstances, and an object thereof is to provide an extremely good cassette tape recorder device that can reliably prevent malfunctions with a simple configuration and can effectively promote downsizing. do.

[Summary of the invention]

That is, the present invention has a reel shaft provided in a tape cassette storage portion so as to be rotatable and slidable in the axial direction, and a reel hub of the tape cassette provided coaxially with the reel shaft and interlocked with the rotation of the reel shaft. The reel cap is fitted with a reel cap, and a tape recorder mechanism unit that causes the tape to run in a predetermined state in conjunction with the operation of the reel shaft. The reel shaft is provided independently of the operation and biased in a direction opposite to the reel hub fitting direction, thereby preventing the reel shaft from being erroneously operated when fitting the reel hub to the reel cap. It is designed to prevent this.

Before explaining one embodiment of the present invention, the basic structure of a cassette tape recorder to which the present invention is applied will be explained. FIGS. 1a and 1b show a front and side view of a cassette tape recorder to which the present invention is applied, respectively. That is, the cabinet 11 is approximately box-shaped and has approximately the same size as a cassette case that accommodates a tape cassette. One flat surface of this cabinet 11 serves as a cassette lid 12 as it is. The cassette lid 12 is supported so that it can be opened and closed manually by the user by rotating it in the directions of arrows A and B in FIG. 1B. Further, the cassette lid 12 is lightly locked in the open position and the closed position to prevent it from wobbling. Further, the cassette lid 12 has a cassette holder, the details of which will be described later. This cassette holder is linked to the opening and closing operations of the cassette lid 12, and is capable of holding the tape cassette 13 shown by the two-dot chain line in FIG. 1b.

Here, the tape cassette 13 is placed inside the cabinet 11 with the cassette lid 12 closed.
There are provided a tape cassette storage section 14 that can accommodate a tape recorder mechanism section, a circuit section, a battery storage section, etc., which will be described later. Further, in the cabinet 11, a head section 16 equipped with a playback head, a pinch roller, etc., which will be described later, is provided in a portion facing the tape exposed surface of the tape cassette 13. This head portion 16 is interlocked with the opening/closing operation of the cassette lid 12 together with the cassette holder.

The tape cassette 13 is stored in the tape cassette storage section 14 as shown in FIG.
A pair of reel shafts 17 and 18 that fit into a pair of reel hubs (not shown) are supported, respectively.
The cassette lid 12 is also designed to include rotating shafts 171, 181 of the reel shafts 17, 18 at positions corresponding to the reel shafts 17, 18 on the tape winding side during fast forwarding and rewinding. child 19
and a rewind operator 20 are provided, respectively. These fast forward and rewind operators 19, 20
As will be described later, the rotation shaft 17 of the reel shafts 17 and 18
1,181 in the direction of its axis.

Further, the cassette lid 12 has a position corresponding to the head portion 16, that is, a position corresponding to the tape cassette 1.
The playback operator 21 is located at a position that does not face the flat surface of 3.
A stop operator 22 is installed substantially perpendicularly to the surface of the cassette lid 12 so as to be pressable. moreover,
A protrusion 23 is provided approximately at the center of the cassette lid 12. This window portion 23 is formed of, for example, a transparent acrylic plate, and is arranged so as to overlap at least a portion of a well-known tape see-through window formed on the flat surface of the tape cassette 13. That is, the right end portion of the window portion 23 in FIG. ing.
In addition, in terms of visually observing the tape running state from the outside, the fast forward and rewind operators 19 and 2
0 may be made of a transparent material.

Here, in the cassette lid 12, between the fast forward and rewind operators 19 and 20 and the play and stop operators 21 and 22, there is a tapered tape that widens outward from the tape cassette storage section 14 side. A long hole 121 is formed. This long hole 12
1, when receiving radio using Chuna Pack,
This is to enable channel selection operations to be performed with the cassette lid 12 closed. That is, this cassette tape recorder is not only capable of simply playing back tapes, but also can receive radio broadcasts by using a tuner pack. This uses a tuner pack in which a tuner circuit for receiving, tuning, detecting, and amplifying radio waves is housed in a casing that has approximately the same shape as the tape cassette. Cassette storage section 1
This is done by installing it inside the 4. When a desired broadcasting station is selected by operating the tuning dial provided on the tuner pack, the received radio waves are detected and amplified, and then introduced into the main amplifier circuit in the cassette tape recorder via the connection terminal. This is where the radio broadcast is received. At this time, with the cassette lid 12 closed, the channel selection dial is projected to the outside through the elongated hole 121, and the cassette lid 12 is not opened.
It is possible to perform channel selection operations.

Further, on the side surface of the cabinet 11, there are provided a volume adjustment dial, a tape type (normal, chrome, metal, etc.) switch, a headphone jack, etc. (not shown).

Here, FIG. 2 shows the cassette lid 12 taken out from the cabinet 11. That is, the cassette lid 12 has through holes 122, 12 through which the playback operation element 21 and the stop operation element 22 are inserted.
3 are formed respectively. As shown in FIG. 3, the cassette lid 12 is formed with four side portions 124 to 127, which form part of the side surfaces of the cabinet 11. The fast forward and rewind operators 19 and 20 are substantially rectangular plates, and are installed so as to close substantially rectangular through holes formed in the cassette lid 12, which are not visible in FIG. Here, as shown in FIG. 3, a pair of bearing portions 191, 192 and 201, 202 are formed at one end of the back side of the fast forward and rewind operators 19, 20, respectively.

Further, on the back side of the cassette lid 12, bearing parts 193, 194, and 19 are provided at positions that sandwich the bearing parts 191, 192 of the fast-forwarding operator 19, respectively.
5,196 are formed. Furthermore, bearing parts 203, 204 and 205, 206 are formed on the back side of the cassette lid 12 at positions that sandwich the bearing parts 201, 202 of the rewind operator 20, respectively. And each of the above-mentioned bearing parts 191 to 1
96 and 201 to 206 are arranged on the same line, and through holes 128 and 129 are respectively formed in side parts 125 and 127 of the cassette lid 12 corresponding to both ends of the row.

Here, as shown by the dotted line in FIG. 3, the support shaft 24 is inserted from the outside into the through hole 128 of the side part 125 of the cassette lid 12. And this support shaft 24
The fast forward and rewind operators 19 and 20 are supported by the cassette lid 12 by passing through each of the bearing portions 191 to 196 and 201 to 206. At this time, both ends of the support shaft 24 are supported by bearing portions 197 and 207 formed on the back side of the cassette lid 12. Further, the fast forward and rewind operators 19 and 20 are
The substantially central portion of the back side is pressed by the other end portion of the leaf springs 198, 208, one end of which is supported by the support shaft 24, so that the cassette lid 12 is directed outwardly about the support shaft 24. Previously biased to rotate, this rotation is caused by the edges of the fast forward and rewind controls 19, 20 and the fast forward and rewind controls 1.
The fast forward and rewind operator 1 is engaged with the engaging portions (not shown) formed on the circumferential side of the through hole of the cassette lid 12 through which the fast forward and rewind operators 9 and 20 are inserted.
9 and 20 are held in the positions shown in FIG.

For this reason, the fast forward and rewind operator 19,
Reference numeral 20 is a device that can be pressed downward in FIG.
The back surfaces of the reel shafts 9 and 20 can press the rotating shafts 171 and 181 of the reel shafts 17 and 18, respectively, in the axial direction.

Here, FIG. 4 shows the overall appearance of the tape recorder mechanism section, head section 16, cassette holder, etc. installed in the mechanism storage section 15. That is, 25 in FIG. 4 is the main chassis of the tape recorder mechanism, which is connected to the reel shaft 1 mentioned above.
7 and 18 are supported rotatably and slidably in the axial direction. In addition, the main chassis 25
A capstan 26 which is a rotating shaft of a flywheel to be described later, the reel shafts 17 and 18, a motor 27 for rotationally driving the capstan 26, and the like are supported, respectively. Further, at one end of the main chassis 25, there are arrows A in FIG.
A cassette holder 28 is supported rotatably in the B direction. This cassette holder 28 has
Hold parts 2 are attached to both ends of the tape cassette (not shown) so as to sandwich both ends in the width direction of the tape cassette in the thickness direction.
81,282 are formed. Further, approximately in the center of the cassette holder 28 is a playback head 2.
9 and a pinch roller 30 that can move toward and away from the capstan 26 are supported, respectively. moreover,
The cassette holder 28 supports the playback and stop operators 21 and 22, respectively.

The cassette lid 12 is mounted by placing it over the cassette holder 28. At this time, the playback and stop controls 21 and 22 are inserted into the through holes 122 and 123 (the second one) formed in the cassette lid 12.
(see figure) for external operation. Here, when the cassette lid 12 is opened, the cassette holder 28 is rotated in the direction of arrow A in FIG.
The state shown in the figure is achieved. At this time, the playback/stop operators 21, 22, playback head 29, and pinch roller 30 are moved together with the cassette holder 28.

Next, detailed configurations of the tape recorder mechanism section and head section 16 will be explained. That is,
In FIG. 6, a playback operator 21 is located at the bottom of the main chassis 25, as shown by a two-dot chain line, and is supported by a cassette holder 28, which is not shown in FIG. And this main chassis 25
A head chassis 31 is supported by a cassette holder 28 and located on the right side of the playback operator 21 in the figure. This head chassis 31 has a rotating shaft 311 provided at the right end in the figure that is loosely fitted into the cassette holder 28, so that
It is rotatably supported in the directions of arrows C and D in FIG. Further, the reproduction head 29 is attached to the left end of the head chassis 31 in the drawing.
Furthermore, a pinch lever 3 is attached to the rotation shaft 311.
01 is rotatably supported. The pinch roller 30 is rotatably supported at the other end of the pinch lever 301.

Here, the head chassis 31 has a torsion spring (not shown) that has one end locked to one side of the head chassis 31 and the other end wrapped around the rotation shaft 311 and locked to the cassette holder 28. As a result, it is urged to rotate in the direction of arrow D in FIG. 6 about the rotation shaft 311. Further, the pinch lever 301 is rotated about a rotation shaft 311 in the direction of arrow C in the figure by a coil spring (not shown) being engaged between the pinch lever 301 and the head chassis 31. Forced. Here, the rotating shaft 302 of the pinch roller 30 extends so as to be loosely fitted into a long hole 312 formed in the head chassis 31.
Therefore, the pinch lever 301 is rotated by the spring in the direction of arrow C in the figure until the rotating shaft 302 comes into contact with the upper end of the elongated hole 312 in the figure.

Further, as shown in FIG. 7, at the lower left end of the head chassis 31 in FIG.
2 is engaged with an engaging portion 321 extending from one end thereof. This regeneration drive member 32 has a through hole 32 formed in a mounting portion 322 extending to the other end.
A rotating shaft (not shown) protruding from the main chassis 25 is fitted into the main chassis 25, so that the main chassis 25 is rotatably supported in the directions of arrows E and F in the figure. The playback operator 21 is supported by the cassette holder 28 above the base end portion 324 of the playback drive member 32 in the drawing so as to be slidable vertically in the drawing. However, the playback operator 21 is the seventh
The slide in the upper part of the figure is supported by a cassette holder 28 in a manner that prevents it from coming off.

An operating shaft 211 extends downward in the figure from the lower surface of the playback operator 21 in FIG. The bottom surface of section 212 is attached. The top of this first drive section 212 is connected via a shaft 213 to the top of a second drive section 214 having a substantially conical shape. Then, this second drive section 21
4 is the base end portion 32 of the regeneration drive member 32.
It is facing 4.

Therefore, the rotation of the head chassis 31 by the torsion spring in the direction of arrow D in FIG. 32 rotates in the direction of arrow E in FIG.
The base end portion 324 presses against the bottom surface of the second drive portion 214 to reach a position where it is prevented from coming off when the playback operator 21 is slid upward in the figure.

Now, suppose that the playback operator 21 is pressed downward in the figure as shown in FIG. Then,
The bottom surface of the second drive portion 214 presses the base end portion 324 of the regeneration drive member 32, and the regeneration drive member 32 is rotated in the direction of arrow F in FIG. Therefore, the engaging portion 321 of the regeneration drive member 32 is connected to the head chassis 3.
1 is pressed against the biasing force of the torsion spring, thereby rotating the head chassis 31 in the direction of arrow C in FIG. At this time, the reproducing head 29 comes into contact with a tape (not shown) of the tape cassette, and the pinch roller 30 is pressed against the capstan 26 through the tape. Here, when the pinch roller 30 is pressed against the capstan 26, the pinch lever 301 resists the biasing force of the spring that biases the pinch lever 301 to rotate in the direction of arrow C in FIG. Since the positional relationship is set so that it is pushed back in the direction of arrow D in FIG. 6 about the rotation shaft 311, it is eventually pressed against the capstan 26 by the biasing force of the spring. Further, the playback operator 21 is locked at the pressing operation position shown in FIG. 8, and the locking mechanism will be described later.

Here, as shown in FIG. 6 again, the motor 2 is located at the upper right of the main chassis 25 in the figure.
7 is installed. A small-diameter pulley 272 is fitted onto the rotating shaft 271 of the motor 27. Further, the flywheel 33 is rotatably supported at the lower right part of the main chassis 25 in the figure, and the flywheel 33 and the pulley 2
72 is connected via the belt 34 so that rotational force can be transmitted. And the above flywheel 3
The rotating shaft of No. 3 is the capstan 26. Further, the flywheel 33 includes a ninth
As shown in the figure, a gear 35 with a small diameter is provided coaxially.

On the other hand, among the pair of reel shafts 17 and 18 provided approximately at the center of the main chassis 25, the reel shaft 17 that is on the winding side during fast forwarding is
It is supported by the main chassis 25 as shown in FIG. That is, the main chassis 25 has a through hole 251 in the part where the reel shaft 17 is attached.
is formed. A bearing member 36 having a substantially cylindrical shape and having a flange portion 361 with a larger diameter than the through hole 251 is inserted into the through hole 251 at the lower part of the figure. and are fixed by screws 362, 362. A rotating shaft 171 of the reel shaft 17 is rotatably inserted into this bearing member 36.

Here, the portion of the rotating shaft 171 that protrudes upward in the drawing from the bearing member 36 is inserted into the through hole 371 formed at the bottom of the lock member 37, which is formed in the shape of a cylinder with a bottom, and then inserted into the reel cap. 38 is fitted. Although the reel cap 38 is rotated integrally with the rotating shaft 171, the locking member 37 is independent of the rotating shaft 171. A coiled spring 39 is interposed between the upper end of the bearing member 36 in the drawing and the bottom of the locking member 37.
The rotary shaft 171 is urged upward in the figure through the reel cap 38 and the reel cap 38. Further, at the lower end of the locking member 37 in the figure, a collar-shaped locking part 37 having a tapered part 372 extending from the bottom to the top in the figure is provided.
3 is formed. This locking portion 373 is formed to have a smaller diameter than the through hole 251 of the main chassis 25.

Further, the portion of the rotating shaft 171 that protrudes downward in the drawing from the bearing member 36 is made slightly smaller in diameter via a stepped portion 172, and the smaller diameter portion has a smaller diameter gear 40 and a larger diameter gear. 41 are fitted respectively. These gears 40 and 41 rotate integrally with the rotating shaft 171. Of these, the gear 40 is fixed to the rotating shaft 171, but the gear 40 is provided so as to be slidable in the axial direction of the rotating shaft 171. There is. Further, the gear 41 is connected to the rotating shaft 1
A coiled spring 412 is interposed between the washer 411 attached to the lower end of the gear 41 in the figure, and the gear 41 is biased upward in the figure. The movement of the gear 41
until it comes into contact with the gear 40.

Here, in the main chassis 25, a shaft 252 is installed approximately in the center between the reel shaft 17 and the flywheel 33. A large-diameter gear 42 and a small-diameter gear 43 are rotatably supported on this shaft 252 from above in FIG. 9, respectively.
A substantially ring-shaped friction member 44 is interposed between the gears 42 and 43. Further, a stop 45 having a substantially cylindrical shape and having a flange 451 at the bottom end in the figure is fitted into the lower part of the shaft 252 in the figure, and a coil provided on the flange 451 of the stop 45 is fitted. The gear 4 is
3 presses the gear 42 via a friction member 44. For this reason, the gears 42 and 43 are in an interlocking relationship. The gear 42 is meshed with the gear 35 of the flywheel 33, and the gear 42 is meshed with the gear 35 of the flywheel 33.
is meshed with the gear 41 of the reel shaft 17. At this time, the gear 42 is in a position where it meshes with the gear 40 of the reel shaft 17, but as is clear from FIG. 9, the gears 42 and 40 are not meshed because they are shifted vertically in the figure.

On the other hand, among the pair of reel shafts 17 and 18,
The reel shaft 18 which becomes the winding side during rewinding is the first
As shown in FIG. 0, it is supported by the main chassis 25. That is, the main chassis 25 has a through hole 253 in the part where the reel shaft 18 is attached.
is formed. A bearing member 46 having a substantially cylindrical shape and having a mounting portion 461 extending to the peripheral edge of the through hole 253 at the lower part of the figure is inserted into the through hole 253, and the peripheral edge of the through hole 253 and the mounting portion 461 are not shown. It is fixed with screws etc. and,
A rotary shaft 181 is rotatably inserted into this bearing member 46 .

Here, the portion of the rotating shaft 181 that protrudes upward in the figure from the bearing member 46 is inserted into the through hole 471 formed at the bottom of the lock member 47, which is formed in the shape of a cylinder with a bottom, and then inserted into the reel cap. 48 is fitted. Although the reel cap 48 is rotated integrally with the rotating shaft 181, the locking member 47 is independent of the rotating shaft 181. A coiled spring 49 is interposed between the upper end of the bearing member 46 in the drawing and the bottom of the locking member 47.
The rotating shaft 181 is urged upward in the figure via the reel cap 48. Further, at the lower end of the locking member 47 in the figure, a collar-shaped locking part 47 having a tapered part 472 extending from the bottom to the top in the figure is provided.
3 is formed. This locking portion 473 is formed to have a smaller diameter than the through hole 253 of the main chassis 25.

In addition, a gear 50 with a small diameter is provided at a portion of the rotating shaft 181 that protrudes downward in the figure from the bearing member 46.
is fitted. This gear 50 has a rotating shaft 181
It rotates integrally with the

Here, in the main chassis 25, a shaft 2 is located approximately at the center of the reel shaft 18 and the shaft 252.
54 have been planted. A substantially cylindrical mounting member 51 is rotatably attached to this shaft 254.
It is slidably inserted in the axial direction, that is, in the vertical direction in the figure. A rewinding lever 52 and a gear 53 are fitted onto the mounting member 51. Further, a washer 51 is attached to the lower end of the mounting member 51 in the figure and to the lower end of the shaft 254 in the figure.
A coiled spring 512 is interposed between the mounting member 51 and the mounting member 51, so that the mounting member 51 is biased upward in the figure, and in this state, the gear 53 is meshed with the gear 50 of the reel shaft 18. . At this time,
The gear 53 is in a position where it meshes with the gear 42, but as is clear from FIG.
They are not engaged because they are shifted vertically in the figure.

Further, the rewinding lever 52 is a plate-shaped body,
At one end thereof, there is a meshing part of the gears 53 and 50,
A connecting portion 521 is formed between the reel shaft 18 and the lower end of the locking member 47 in the figure, and is inserted through the through hole 253 of the main chassis 25. Furthermore, the other end of the rewinding lever 52 extends to the reel shaft 17 side, and the tip in the extending direction engages with the flat surface of the gear 41 of the reel shaft 17 from above in the figure. An engaging portion 522 is formed.

Here, as shown again in FIG. 6, a rotation shaft 255 is installed approximately in the center of the main chassis 25. A lock lever 54 and a switch lever 55 are rotatably supported on this rotation shaft 255, respectively. That is, as shown in FIGS. 7, 9, and 10, the lock lever 54 has a tapered portion 215 of the first driving portion 212 of the playback operator 21 and a tapered portion of the locking member 37 of the reel shaft 17. 372 and the tapered portion 472 of the locking member 47 of the reel shaft 18, first to third engaging portions 541 to 543 that can engage with the tapered portion 472, respectively.
is formed so as to extend in three directions around the rotation axis 255. Further, the switch lever 55 has substantially the same shape as the lock lever 54, and is provided to overlap the lock lever 54, and includes the playback operator 21, the reel shaft 17,
First to third engaging portions 551 to 553 that can engage with the 18 tapered portions 215, 372, and 472, respectively, are formed to spread in three directions around the rotation axis 255. be. Furthermore, the third engaging portion 55 of the switch lever 55
A fourth engaging portion 554 that engages with the leaf switch 56 for supplying electric power to the motor 27 is formed at the tip of the fourth engaging portion 554 . When the switch lever 55 is rotated counterclockwise in FIG. 6, the leaf switch 56 is turned on by being pressed by the fourth engaging portion 554, and the motor 27 is rotationally driven. . Furthermore, a protruding engagement piece 555 is formed on one side of the third engagement portion 553 of the switch lever 55 . A coiled spring 556 is engaged with this protruding engagement piece 555 and a predetermined position of the main chassis 25, so that the switch lever 55 is urged to rotate clockwise in FIG. Therefore, the first to third engaging portions 551 to 55 of the switch lever 55
3 is pressed by each tapered portion 215, 372, 472.

On the other hand, the third engaging portion 5 of the lock lever 54
A protruding engagement piece 544 is also formed on one side of 43. A coiled spring 545 is engaged with this protruding engagement piece 544 and a predetermined position of the main chassis 25, so that the lock lever 5
4 is biased to rotate clockwise in FIG. Therefore, the first to third engaging portions 541 to 543 of the lock lever 54 are connected to each tapered portion 215, 37.
2,472. Further, shafts 571 and 572 are installed in the main chassis 25 in the vicinity of the reel shafts 17 and 18, respectively. These shafts 571, 572 are connected to a stop slider 5 provided horizontally in FIG. 6 between the two reel shafts 17, 18.
In the long holes 573 and 574 formed at both ends of 7,
Each is loosely fitted. For this reason, the stop slider 57 is made slidable in the left and right directions in FIG. Then, the stop slider 5
A protruding engagement piece 575 is formed on one side of 7.

Here, in the main chassis 25, a shaft 576 is protruded from the upper part of the protruding engagement piece 575 of the stop slider 57 in FIG. and,
The stop slider 57 is configured such that both ends of a torsion spring 577 whose substantially central portion is wound around the shaft 576 and fixed to the shaft 576 sandwich both ends of the protruding engagement piece 575. It is held so that it returns to the neutral position even if it is slid in either the left or right direction in Figure 6. Further, in this neutral position, the protrusion 578 formed at one end of the stop slider 57 is located near the tapered portion 372 of the locking member 37 of the reel shaft 17. moreover,
A protrusion 579 formed at the other end of the stop slider 57 is located near the tapered portion 472 of the locking member 47 of the reel shaft 18.

In the above-described configuration, it is assumed that the playback operator 21 is operated to play back a tape. Then, as previously explained in FIGS. 6 and 7, the head chassis 31 is moved, the reproducing head 29 is brought into contact with the tape, and the pinch roller 30 is pressed against the capstan 26 through the tape. At this time, when the playback operator 21 is pressed downward in FIG. , 551 is pressed. Therefore, the lock lever 54 and the switch lever 55 are rotated counterclockwise in FIG. 6 against the urging force of the springs 545 and 556. Then, when the playback operator 21 is pressed to the position shown in FIG.
It comes to face the bottom part of No. 12. For this reason,
The lock lever 54 is rotated clockwise in FIG. 6 by the biasing force of a spring 545, and its first engaging portion 541 engages with the bottom surface of the first drive portion 212, and the regeneration operator 21 is moved to the operating position. It is locked. At this time, the switch lever 55 is pressed by the tapered portion 215, and its first engaging portion 551 remains pressed by the first driving portion 212. For this reason, the switch lever 55
The fourth engaging portion 554 turns on the leaf switch 56, and the motor 27 is driven to rotate counterclockwise in FIG.

Then, the flywheel 33 is rotated in the same direction, and the rotational force is applied to the gears 35, 42 and the friction member 4.
4, is transmitted to the reel cap 38 via the gears 43, 40 and the rotating shaft 171, and is transmitted to the reel cap 38.
8 is rotated counterclockwise in FIG. 6, and the tape is played back.

Next, it is assumed that the tape fast forward is turned off and the fast forward operator 19 is pressed as shown in FIG. Then, the reel cap 38 of the reel shaft 17 is pressed downward in the figure, and the lock member 37 is accordingly slid downward in the figure against the biasing force of the spring 39. This lock member 37
is moved downward in the figure until its lower end in the figure abuts against the flange 361 of the bearing member 36. In this state, the second engaging portion 552 of the switch lever 55 is pressed by the tapered portion 372 of the locking member 37, and the switch lever 55 is rotated counterclockwise in FIG. , the second engaging portion 542 of the lock lever 54 is engaged with the engaging portion 373 of the locking member 37. Therefore, the leaf switch 56 is turned on and the reel shaft 17 is locked at the pressed position. At this time, as the reel shaft 17 is pressed, the rotation shaft 171 also moves downward in the figure, and the gear 40 fitted on the rotation shaft 171,
41 is also moved in the same direction. Therefore, the gear 41 separates from the gear 43, and the gear 40 comes to mesh with the gear 42. Therefore, flywheel 3
The rotational force in the counterclockwise direction in FIG. 6 of 3 is generated by gears 35,
42, 40 and the rotating shaft 171 to the reel cap 38, and the reel cap 38
The tape is rotated counterclockwise at high speed in the figure, and fast-forwarding of the tape is performed here.

It is also assumed that the rewind operator 20 is pressed to rewind the tape. Then, as shown in FIG. 12, the reel cap 48 of the reel shaft 18 is pressed downward in the figure, and the lock member 47 is accordingly slid downward in the figure against the biasing force of the spring 49. This lock member 47
is moved downward in the figure until its lower end in the figure abuts against the mounting portion 461 of the bearing member 46. In this state, the taper portion 472 of the locking member 47 causes the switch lever 55 to be locked in the third position.
The engaging portion 553 of the switch lever 5 is pressed.
5 is rotated counterclockwise in FIG.
The third engagement portion 543 of the lock lever 54 is engaged with the engagement portion 473 of the lock member 47. Therefore, the leaf switch 56 is turned on and the reel shaft 18 is locked at the pressed position. At this time, the lower end of the locking member 47 in the figure presses the connecting portion 521 of the rewind lever 52 downward in the figure, so that the entire rewind lever 52 is slid downward in the figure. Therefore, the gears 50 and 53 are slid downward in the figure while being meshed, and at this time, the gear 53 is meshed with the gear 42.
Furthermore, the engaging portion 522 of the rewinding lever 52 causes the gear 41 to slide downward in the figure against the biasing force of the spring 412, so that the gear 41 is disengaged from the gear 43. Therefore, the rotational force of the flywheel 33 in the counterclockwise direction in FIG.
5, 42, 53, 50 and the rotating shaft 181, the reel cap 48 is rotated at high speed clockwise in FIG. 6, and the tape is rewinded.

Next, a case will be described in which the stop operator 22 is operated in the playback, fast-forwarding, and rewinding states.
That is, as described above, this stop operation element 22 is supported by the cassette holder 28 so as to be slidable in the vertical direction in FIG. 13. However, the stop operation element 22 is supported by a cassette holder 28 so as to be prevented from coming off from the upper slide in FIG.

An operating shaft 221 extends downward in the figure from the bottom surface of the stop operator 22 in FIG. , is attached to the bottom surface of the substantially conical drive section 223. here,
The first engaging portion 541 of the lock lever 54 is
The tapered portion 224 of the driving portion 223 is also pressed against the urging force of a spring 545 (see FIG. 6). The stop operator 22 is operated by a spring 2.
13 to the position where it is prevented from coming off by 22.
It is biased upward in the figure. Therefore, the stop operator 22 is moved to the first position against the biasing force of the spring 222.
When pressed downward in Figure 3, the tapered portion 22
4 to the first engaging portion 54 of the lock lever 54.
1 is moved in the direction of the arrow in FIG. In other words,
The lock lever 54 is rotated counterclockwise in FIG.

Here, in the playback, fast-forwarding, and rewinding states, as described above, either the first drive section 212 or the locking members 37, 47 locks the lock lever 54.
The corresponding first to third engaging portions 541 to 54
Locked by 3. Therefore, no matter which of the three operating states the tape recorder is in, by operating the stop operator 21 and rotating the lock lever 54 in the counterclockwise direction in FIG. Eventually, the lock will be released and the system will come to a halt.

Here, the stop operator 22 is the thirteenth
When pressed downward in the figure, the operating stroke is limited to a shallow position where the first engaging part 541 of the lock lever 54 is not locked by the drive part 223, and the stop operating element 22 is not operated. It is designed so that it will not be locked depending on the position.

The cassette tape recorder described with this basic configuration is equipped with an automatic stop mechanism that automatically stops the tape when it reaches the end during playback. That is, referring to FIGS. 6 and 9, one end of a friction lever 58 is provided at the lower part of the gear 43 in FIG. 9 via a well-known friction mechanism. This friction lever 58 is biased in the direction of rotation of the gear 43 when it is rotated. Then, the friction lever 58
A long hole 581 is formed at the other end, and a pin 591 protruding from one end of the detection lever 59 is loosely fitted into the long hole 581. The detection lever 59 is rotatably supported by a shaft 592 protruding from the main chassis 25 at a substantially central portion thereof. Further, one side of the other end of the detection lever 59 is brought into contact with a side surface of a cam portion 421 provided on the gear 42 . Furthermore, two pins 593 and 59 are provided at the other end of the detection lever 59.
4 is provided protrudingly. Of these, the pin 593 faces the second engaging portion 542 of the lock lever 54, and the other pin 594 is engageable with the curved operating wall 422 formed on the flat surface of the gear 42. There is.

In the tape playback state described above, the flywheel 33 and the gear 35 are rotated counterclockwise in FIG.
It is rotated clockwise in the figure. Therefore, due to the rotational force of the gear 43, the friction lever 58 is biased clockwise in FIG.
It is biased clockwise in the figure with the center at . At this time, the other end of the detection lever 59 is connected to the cam portion 42.
Since it is in sliding contact with the shaft 592, it ultimately performs a rocking motion around the shaft 592, and a stable reproduction state continues. When the tape reaches the end in such a reproduction state, the rotation of the reel shaft 17 is stopped, and thereby the rotation of the gears 41 and 43 is stopped. At this time, there is slippage between the gears 42 and 43. By stopping the rotation of the gear 43, no biasing force is applied to the friction lever 58 and the detection lever 59. On the other hand, since the gear 42 continues to rotate, the cam portion 421 is also rotating, and the detection lever 59 is moved along the shaft 5 by the length of the maximum diameter of the cam portion 59.
It is rotated counterclockwise in FIG. 6 about 92 and stopped at that position. Then, due to the rotation of the gear 42, the outer part of the operating wall 422 comes into contact with the pin 594 of the detection lever 59, and the pin 594 and the detection lever 5 move along the curved shape of the operating wall 422.
9 further counterclockwise in FIG. 6 from the above-mentioned stop position. At this time, the pin 593 of the detection lever 59 is connected to the second engaging portion 54 of the lock lever 54.
2 and rotates the lock lever 54 counterclockwise in FIG. For this reason, the playback operator 21
The lock is released at the operating position, and an automatic stop occurs at this point.

Here, the function of the stop slider 57 will be explained. That is, in FIG. 14a,
As mentioned above, the stop slider 57 is supported by the main chassis 25 so as to be able to slide freely in the direction of the arrow in the figure, and is usually moved to the neutral position as shown in FIG. 14a by the torsion spring 577 shown in FIG. It is held in place. When the stop slider 57 is in its neutral position, the projections 578 and 579 formed at both ends are
The taper portions 372, 472 of the respective locking members 37, 47 of the reel shafts 17, 18 are located at the lower part in FIG. 14a.

In this state, as shown in Figure 14b,
For example, by operating the rewind operator 20, the reel shaft 18
It is assumed that the lock lever 54 is pushed downward in the figure and is locked at the pushed-in position by the third engaging portion 543 of the lock lever 54 as described above. Then, the tapered portion 472 of the locking member 47 of the reel shaft 18 presses the protrusion 579 of the stop slider 57, so the stop slider 57 resists the biasing force of the torsion spring 577 and moves to the right in FIG. 14b. be slid in the direction. At this time, the protrusion 57 of the stop slider 57
8 is located at a position substantially in contact with the bearing member 36 of the reel shaft 17, and the projecting piece 578 is interposed between the flange portion 361 of the bearing member 36 and the locking portion 373 of the lock member 37.

Therefore, even if the fast-forward operator 19 is not operated in the rewinding state shown in FIG. , it is prevented from being pushed into the normal pushing position, that is, the position where it is locked by the second engaging portion 552 of the lock lever 54. Also, contrary to the above, reel shaft 1
7 is locked by the lock lever 54 at the normal push-in position, the projection 578 of the stop slider 57 touches the tapered portion 3 of the lock member 37.
72, the stop slider 57 is slid to the left in FIG. 14a against the biasing force of the torsion spring 577. At this time, the protrusion 57 of the stop slider 57
9 is a mounting portion 4 of the bearing member 46 of the reel shaft 18;
61 and the locking portion 473 of the locking member 47. Therefore, even if the rewind operator 20 is not operated in the fast-forward state, the reel shaft 1
The locking portion 473 of the lock member 47 of No. 8 comes into contact with the protrusion 579 of the stop slider 57, and is prevented from being pushed into the normal pushing position.

In addition, the above-mentioned fast forward and rewind operators 19, 20
If you try to operate both reel shafts 17 and 17 at the same time,
18 will be pushed in, but at this time, the tapered portions 372, 472 of each lock member 37, 47 will come to grip the stop slider 57.
Both reel shafts 17 and 18 are designed so that they do not reach the normal pushing position.

That is, only one of the reel shafts 17, 18 is selectively locked at the push-in position, and in short, both the fast-forward and rewind operators 19, 20 are prevented from being pushed.

[Embodiments of the invention]

In the cassette tape recorder having the above-mentioned basic structure, one embodiment of the present invention will be described in detail below with reference to the drawings. Figure 15a
9 shows the reel shaft 17, and the same parts as in FIG. 9 are denoted by the same symbols, and only the different parts will be explained here. That is, the rotating shaft 1
A reel cap attachment member 60 having a substantially bottomed cylindrical shape is fitted into the upper end portion of the reel cap 71 in the drawing. This reel cap attachment member 60 rotates integrally with the rotating shaft 171, and has a flange 601 formed at its bottom. Further, a protrusion 602 is formed approximately at the center of the bottom surface of the reel cap attachment member 60, with which the fast-forward operator 19 comes into contact and is pressed when the fast-forward operator 19 is operated. Further, the open end of the reel cap attachment member 60 is in contact with the bottom surface of the lock member 37.

Therefore, when the fast-forwarding operator 19 is operated, the protrusion 602 of the reel cap mounting member 60 is pressed downward in the figure, and along with this, the rotation shaft 17
1 and the lock member 37 are moved in the same direction.

Here, the side portion 603 of the reel cap attachment member 60 is inserted through a through hole 611 formed at the substantially central portion of the bottom surface of the reel cap 61, which has a substantially bottomed cylindrical shape. And the reel cap mounting member 60
The outer peripheral surface of the side portion 603 is formed, for example, in a regular hexagonal shape when viewed from below in FIG.
3. It is formed into a regular hexagonal shape corresponding to the outer peripheral surface. Therefore, although the reel cap 61 rotates integrally with the rotation shaft 171 via the reel cap attachment member 60, it slides in the vertical direction in the figure regardless of the sliding operation of the rotation shaft 171 in the axial direction. It is possible. Also,
The bottom of the reel cap 61 and the lock member 37
There is a reel cap mounting member 60 between the bottom of the reel cap and the bottom of the reel cap.
A coil-shaped spring 62 is provided so as to wind around the side portion 603 of. For this reason, the reel cap 61 is normally biased upward in the figure.
The reel cap 61 is moved upward in the figure until its bottom comes into contact with the flange 601 of the reel cap mounting member 60.

Further, one reel hub (not shown) of the tape cassette is fitted into the side portion 612 of the reel cap 61 when the tape cassette is installed in the tape cassette storage section 14. Here, the reel hub of the tape cassette has
As is well known, protrusions (in a normal compact tape cassette, there are six protrusions per reel hub) are formed that protrude toward the inner periphery. A vane 613 is formed on the outer peripheral surface of the side portion 612 of the reel cap 61 for engaging with a protrusion of the reel hub and transmitting the rotational force of the reel cap 61 to the reel hub. For this purpose, the reel hub of the tape cassette is fitted into the reel cap 61, and the fast forward operator 19 is operated to rotate the rotating shaft 17.
1 and the locking member 37 downward in the drawing, the tape is rapidly forwarded as described above.

Here, when fitting the reel hub of the tape cassette to the reel cap 61, if the protrusion of the reel hub comes into contact with the tip of the blade 613 of the reel cap 61, as shown in FIG. 15b, the reel cap 61 The rotating shaft 171 and the locking member 37 remain in the non-operating position.

Therefore, when the tape cassette is installed in the tape cassette storage section 14, if the protrusion of the reel hub hits the tip of the blade 613 of the reel cap 61, the rotating shaft 171 and the lock member 37 move to the operating position. Therefore, it is possible to prevent the tape recorder mechanism from entering an undesired fast-forwarding state. In addition, in the above explanation, the reel axis 1
7, the other reel shafts 18 have similar configurations. For this purpose, the cassette lid 12 is opened, the tape cassette is held in the cassette holder 28 which is in the position shown in FIG. This can prevent either reel shaft 17 or 18 from being manipulated when the reel is moved.

Regarding this point, in the reel shafts 17 and 18 shown in the above basic configuration, the reel caps 38 and 48 are integrally attached to the rotating shafts 171 and 181, so that the protrusion of the reel hub is attached to either reel cap 38. , 48, the reel cap 38 or 48 is pressed and the reel shaft 17 or 18 is operated, resulting in an undesirable fast forward or rewind state. be.

However, as shown in FIGS. 15a and 15b, by making the reel cap 61 slidable in the axial direction with respect to the rotating shaft 171 regardless of the operation of the rotating shaft 171, the above-mentioned inconvenience occurs. This can be prevented.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without departing from the gist thereof.

That is, in the above embodiment, a tape recorder only for playback has been described, but the present invention is of course applicable not only to a tape recorder for playing only but also to a tape recorder that performs recording and playback. In other words, the tape recorder referred to here may be one that can perform both recording and playback, or it may be one that can only be used for playback.

〔Effect of the invention〕

Therefore, as detailed above, according to the present invention, it is an object to provide an extremely good cassette tape recorder device that can reliably prevent malfunctions with a simple configuration and can effectively promote downsizing. I can do it.

[Brief explanation of the drawing]

Figures 1a and b are front and side views showing the basic configuration of a cassette tape recorder to which the present invention is applied, Figure 2 is a perspective view of the cassette lid of the cassette tape recorder, and Figure 3 is a perspective view of the cassette lid of the cassette tape recorder. A perspective view showing how the fast forward and rewind controls are attached to the lid, FIG. 4 is a perspective view showing the appearance of the mechanism, head and cassette holder of the same cassette tape recorder, and FIG. 5 is the cassette holder shown in FIG. 4. FIG. 6 is a perspective view showing the tape recorder in its open state, FIG. 6 is a configuration diagram showing details of the tape recorder mechanism, FIG. 7 is a perspective view showing the relationship between the playback controls and the head, and FIG. 8 is the playback operation. FIGS. 9 to 12 are explanatory views of the operation of the tape recorder mechanism, FIG. 13 is a perspective view showing details of the stop operator, and FIGS. 14 a and b. are operation explanatory diagrams showing the action of the stop slider, respectively.
Figures 5a and 5b are a side sectional view and an operation explanatory diagram, respectively, showing an embodiment of the cassette tape recorder device according to the present invention. 11...cabinet, 12...cassette lid,
13... tape cassette, 14... tape cassette storage section, 15... mechanism storage section, 16... head section, 17, 18... reel shaft, 19... fast forward operator, 20... rewind operator, 21... Playback operator, 22... Stop operator, 23... Window section, 24...
... Support shaft, 25 ... Main chassis, 26 ... Capstan, 27 ... Motor, 28 ... Cassette holder, 29 ... Playback head, 30 ... Pinch roller, 31 ... Head chassis, 32 ... Playback drive member, 33 ... Flywheel, 34 ... Belt, 35 ... Gear, 36 ... Bearing member, 37
... Lock member, 38 ... Reel cap, 39
... Spring, 40 to 43 ... Gear, 44 ...
...Friction member, 45...Stopper, 46...Bearing member, 47...Lock member, 48...Reel cap, 49...Spring, 50...Gear, 51...
... Mounting member, 52 ... Rewind lever, 53 ... Gear, 54 ... Lock lever, 55 ... Switch lever, 56 ... Leaf switch, 57 ... Stop slider, 58 ... Friction lever, 59 ... Detection Lever, 60... Reel cap mounting member, 61
...Reel cap, 62...Spring.

Claims (1)

[Claims] 1. A reel shaft provided in the tape cassette storage portion so as to be rotatable and slidable in the axial direction, and a reel coaxial with the reel shaft and interlocked with the rotation of the reel shaft, into which the reel hub of the tape cassette is fitted. and a tape recorder mechanism unit that brings the tape into a predetermined running state in conjunction with the operation of the reel shaft, and the reel cap is moved in the axial direction of the reel shaft independently of the operation of the reel shaft. A cassette tape recorder device characterized in that the reel hub is biased in a direction opposite to the fitting direction of the reel hub.