JPH0445900B2 - - 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]

In recent years, cassette tape recorders have become smaller and lighter, making them more portable, and two-way stereo types have become popular, especially for playback using headphones. It is made so that you can enjoy it. Such portable cassette tape recorders exclusively for headphones have already been made as compact as possible, and at present are approximately the same size as the cassette case that houses the tape cassette.

By the way, the next requirement for this type of miniaturized cassette tape recorder is to improve usability by organically combining each mechanical part and adding an auto-reverse function and a recording function, as well as to reduce power consumption. Power saving measures should be taken to reduce the amount of electricity consumed.

However, it has been difficult to add the above-mentioned requirements to a cassette tape recorder that is aimed at miniaturization because it has many disadvantages that impede miniaturization.

For example, cassette tape recorders that are designed to be more compact have a problem in that the number of mechanical parts increases, making the mechanism more complex and larger. This was the biggest obstacle in adding it.

However, there is a need to promote miniaturization, control each mechanical part in an organic and efficient configuration, and to take power-saving measures to reduce power consumption and to make the device inexpensive.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a cassette tape recorder device which has a simple structure, can be downsized, and can be easily handled.

[Summary of the invention]

That is, the present invention includes a first rotating body that rotates independently of tape running, and a first rotating body that has a non-engaging portion and is engaged with the first rotating body so that rotational force can be transmitted.
A second rotating body for reverse drive that switches and controls tape running between forward and reverse running modes, a tape end detection mechanism that detects the end of the tape wound around the cassette, and is operated by this tape end detection mechanism. a reverse drive member that engages the second rotary body with the first rotary body, and a reverse drive member that cooperates with the tape end detection mechanism, and is configured to operate the tape in one-way travel in a forward or reverse travel mode at an operating position. a number-of-times limiting member that controls the tape running system to a stopped state in response to detection of the end of the tape; engage the rotating body of
a recording operation mechanism that includes a control member that controls a forward running mode of the tape and controls the number of times limiting member to an operating position, and when the number of times limiting member is operated in a tape playback state, a one-way playback operation is performed, and a reverse playback operation is performed. Mode switching is performed, and in the tape recording state, one-way recording is performed in the tape forward running mode.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. FIGS. 1a and 1b show the front and side views 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 for storing tape cassettes, and one flat surface of the cabinet 11 serves as a cassette lid 12 as it is. The cassette lid 12 is manually rotated by the user in the directions of arrows A and B in FIG. ing. Further, the cassette lid 12 has a cassette holder on its back surface, the details of which will be described later. This cassette holder is linked to the opening/closing operation of the cassette lid 12, and is capable of holding a tape cassette 13 shown by a two-dot chain line in FIG.

Here, the tape cassette 1 is placed inside the cabinet 11 with the cassette lid 12 closed.
3, and a mechanism housing section 15 in which a tape recorder mechanism section, which will be described later, is installed. Further, in the portion of the cabinet 11 that faces the tape exposed surface of the tape cassette 13, there is provided a recording/playback head (hereinafter referred to as a recording head), an erasing head, a pair of right and left pinch rollers, etc., which will be described later. Head part 16 made of
is installed. This head section 16 is linked to the opening/closing operation of the cassette lid 12 together with the cassette holder.

Inside the storage section 14, as shown in FIG. 1a, a pair of right and left reel shafts 17 are fitted into a pair of reel hubs (not shown) of the tape cassette 13 and are driven to rotate according to the running direction of the tape. ,1
8 are arranged respectively. The cassette lid 12 also has a fast-forward operator 19 located at a position facing the right and left reel shafts 17 and 18 on the tape winding side during fast-forwarding and rewinding (when the tape runs in the forward and reverse directions). A rewind operator 20 is provided respectively. From now on, fast forward and rewind controls 1
9 and 20 are installed so as to be operable so as to press the rotating shafts 171 and 181 of the right and left reel shafts 17 and 18 in the axial direction thereof.

The cassette lid 12 also has a stop operator 21, a playback operator 22, a recording operator 23 and A manual reverse operator 24 is installed substantially perpendicular to the surface of the cassette lid 12 so as to be operable by pressing. Furthermore, a window portion 2 is provided approximately at the center of the cassette lid 12.
5 is provided, and this window portion 25 is formed of, for example, a transparent acrylic plate, and is installed so as to partially overlap the tape see-through window of the tape cassette 13.

Here, in the cassette lid 12, between the fast forward/rewind operators 19, 20 and the stop operator 21, there is a long hole 121 having an inclination that widens outward from the storage section 14 side. It is formed. This elongated hole 121 is provided so that a channel selection operation can be performed with the cassette lid 12 closed during radio reception using a tuner pack (not shown). That is, this cassette tape recorder is not only capable of simply playing back and recording tapes, but also can receive radio broadcasts using the tuner pack. In this case, the tuner pack, in which the tuner circuit section for receiving, tuning, detecting and amplifying radio waves is housed in the casing, is replaced with the tape cassette 13 in the storage section 1.
4 is loaded. 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. The radio broadcasts are received by listening to the music and playing it on headphones. At this time, with the cassette lid 12 closed, the tuning dial of the tuner pack is inserted through the elongated hole 121 and projected to the outside, so that the tuning operation can be performed without opening the cassette lid 12.

Further, on the side of the cabinet 11 corresponding to the manual reverse operator 24, a number limit switch for setting reverse, which will be described later, is provided. Further, on the side of the cabinet 11, a volume adjustment dial, a headphone jack, etc. (not shown) are provided.

Here, FIG. 2 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, 26 is the main chassis of the tape recorder mechanism section, and the right and left reel shafts 17, 1
8 is rotatably supported and slidably in the axial direction. In addition, the main chassis 26
are provided with a pair of right and left capstans 27, 28, which are the rotational axes of the right and left flywheels, which will be described later, and the right and left reel shafts 17, 18, and also support motors 29, etc. for rotationally driving these. ing. A cassette holder 30 is supported at one end of the main chassis 26 so as to be rotatable in the directions of arrows A and B in the figure.
This cassette holder 30 has holding parts 301 on both ends thereof so as to sandwich both wide end parts of the tape cassette 13 (see FIG. 1b) in the thickness direction.
302 is formed. Further, an upper recording/reproducing head 31 and an erasing head 32 are supported approximately at the center of the cassette holder 30, and a pair of right and left pinch rollers 33, 34 are arranged to sandwich the recording/reproducing head 31 and erasing head 32. Supported.
These right and left pinch rollers 33, 34 are installed so that they can selectively approach and separate from the right and left capstans 27, 28 in accordance with the forward and reverse constant speed running of the tape, as will be described later. Further, the cassette holder 30 includes the stop, play, record and manual reverse operators 21, 22, 23,
24 are supported so as to be freely pressable.

The cassette lid 12 (see FIGS. 1A and 1B) is mounted on the cassette holder 30 with the cover turned over, and the stop, play, record and manual reverse operators 21, 22, 23 ,2
Reference numeral 4 protrudes to the outside and is used for external operation. Here, when the cassette lid 12 is opened, the cassette holder 3
0 is rotated in the direction of arrow A in FIG. 2 and brought into the state shown in FIG. 3. At this time, the above-mentioned stop, play, record and manual reverse operators 21, 22, 2
3, 24, the recording head 31, the erasing head 32, and the right and left pinch rollers 33, 34 are moved together with the cassette holder 30.

Next, the tape recorder mechanism section and head section 1
The configuration of No. 6 will be explained. That is, in FIG. 4, a recording/reproducing head 31, an erasing head 32, right and left pinch rollers 33, 34, etc. supported by the cassette holder 30 (see FIG. 2) are located at the lower part of the main chassis 26 in the figure. ing. and,
Of these, the recording/reproducing head 31 and the erasing head 32 are connected to the cassette holder 3 via a head chassis 35.
It is supported by 0. The head chassis 35 above
A rotating shaft 351 provided at the right end in the figure is loosely fitted into the cassette holder 30, and is supported rotatably in the directions of arrows C and D. Also,
A substantially central portion of the right pinch lever 36 is rotatably supported on the rotation shaft 351. The right pinch lever 36 has the pinch roller 33 rotatably supported at one end around the rotation shaft 351, and a drive section 362 having an inclined section 361 at the other end. It is formed.

Here, one end of the head chassis 35 is locked to one side of the head chassis 35,
The other end is urged to rotate in the direction of arrow D about the rotation shaft 351 by a torsion spring (not shown) which is wound around the rotation shaft 351 and locked to the cassette holder 30 . The right pinch lever 36 is urged to rotate in the direction of arrow C about the rotation shaft 351 by a spring (not shown) engaged between the right pinch lever 36 and the head chassis 35. has been done.

Further, on the left side of the head chassis 35 of the cassette holder 30 in the drawing, a left pinch lever 37 is installed at a position approximately opposite to the right pinch lever 36. The left pinch lever 37 has a substantially central portion supported by a rotating shaft 371, and the left pinch roller 34 is rotatably supported at one end on the right side in the figure about the rotating shaft 371. At the same time, a drive section 373 having an inclined section 372 is formed at the other end on the left side in the figure. The left pinch lever 37 is urged to rotate in the direction of arrow C about the rotation shaft 37 by a spring (not shown).

Here, a reproduction slider 38 is installed on the lower surface of the cassette holder 30 and is moved in the directions of arrows E and F corresponding to the tape running direction. That is, shafts 260, 261, 262 are implanted at the lower end of the main chassis 26 in the figure, and these shafts 260, 261, 262 are inserted through long holes 380, 381, 382 formed in the regeneration slider 38. By doing so, the playback slider 38 moves to arrow E,
It can be slid freely in the F direction. and,
This playback slider 38 has respective driving portions 36 for the right and left pinch levers 36 and 37 at both ends thereof.
Protrusions 383 and 384 are formed corresponding to No. 2 and 373, and can be engaged with bent engagement portions 391 and 401 formed on first and second switching sliders 39 and 40, respectively, which will be described later. First and second engaging pieces 385 and 386 are formed. Here, the protrusions 383 and 384 formed on the reproduction slider 38 are used for the tape cassette 1 to be loaded.
3 (see FIG. 1b) and the center of rotation of the cassette holder 30 (see FIG. 3).

That is, the right and left pinch levers 36, 3
For example, when the playback slider 38 is slid in the direction of the arrow E, the right pinch lever 36 is pressed against the inclined portion 361 of the drive portion 362 by the protrusion 383 on the right side in the figure, resisting the urging force. Since the right pinch roller 33 is rotated in the direction of arrow C, the right pinch roller 33 is pressed against the right capstan 27. At this time, the left pinch lever 37 is rotated in the direction of arrow D by the biasing force of the spring because the protrusion 384 on the left side in the figure of the reproduction slider 38 is positioned at the tip of the inclined portion 372 of the drive section 373. , the left pinch roller 34 is spaced apart from the left capstan 28.

Furthermore, when the reproduction slider 38 is slid in the direction of arrow F, the left pinch roller 34 is pressed against the capstan 28 and the right pinch roller 33 is separated from the right capstan 27 by operating in substantially the opposite direction to that described above. It is something that

In this way, the right and left pinch levers 36 and 37 are driven by the protrusions 383 and 384 of the playback slider 38 formed between the tip of the tape cassette 13 loaded and the center of rotation of the cassette holder 30. Configured. For this reason, the right and left pinch levers 36, 37 have improved operability because their operating strokes are small, and the tape cassette 1
3 can be prevented from malfunctioning when inserted.

Further, at the left end in the figure of the head chassis 35 supported by the cassette holder 30, as shown in FIG.
As shown in FIG. 7 and FIG. 7, a substantially U-shaped regeneration drive member 41 is installed.
An engaging portion 411 extending from one end is engaged with one end of the head chassis 35. and,
The playback drive member 41 is connected to the cassette holder 30.
At the end of the main chassis 30 at the bottom of the
It is rotatably supported in the direction.

Here, as described above, the playback operator 22 is disposed on the cassette holder 30 facing the playback drive member 41, and the playback operator 22 has an operating shaft 221 protruding downward at one end. will be extended. Furthermore, at the bottom end of the playback operator 22,
A transparent hole 222 is formed, and the recording operator 23 is inserted through the transparent hole 222 so as to be freely operable. The recording operator 23 has an operating shaft 231 extending from its lower surface substantially parallel to the operating shaft 221 of the playback operator 22, and each of these operating shafts 221, 231 is supported by a bearing supported by the cassette holder 30. It is inserted through and supported by the member 42.

Furthermore, the bottom surface of a first drive section 223 having a substantially conical shape is attached to the operation shaft 221 of the playback operation element 22 . This first drive section 223 connects to a second drive section 2 whose top part is approximately conical through a shaft 224.
25, this second drive section 225
The bottom surface of the regeneration drive member 41 is opposed to the bottom surface of the regeneration drive member 41 . On the other hand, the operation shaft 23 of the recording operation element 23
1 is attached to the bottom surface of a first driving portion 232 having a substantially conical shape. The top of the first drive section 232 is connected to the top of a substantially conical second drive section 234 via a shaft 233.
The bottom surface of 4 faces the bottom surface of a substantially U-shaped recording movement member 43 that is arranged in parallel with one end of the playback drive member 41 . Then, the first driving section 232 is
The regeneration driving member 41 can be engaged with an engaging portion 412 bent at the upper end thereof. Also,
The recording drive member 43 includes the playback drive member 41.
A driving part 431 is formed at one end facing the engaging part 412 of the recording slider 43 so as to be engageable with a bent engaging part 441 of a recording slider 44, which will be described later.

Here, the recording slider 44 is omitted in FIG. 4 for convenience of illustration, and its details will be described later.

That is, assume that the playback operator 22 is now pressed in the stopped state shown in FIG. Then,
The bottom surface of the second drive section 225 of the playback operator 22 presses the bottom surface of the playback drive member 41, causing the playback drive member 41 to rotate in the direction of arrow G. Therefore, the engagement portion 411 of the playback drive member 41 rotates the head chassis 35 (see FIG. 4) as described above to bring the recording head 31 into contact with the tape, and the right and left pinch rollers 33 and 34 are pressed against the right and left cap runs 27 and 28 via tape. Then, the playback operator 2
2 is locked in the operating position, and its locking mechanism will be described later.

It is also assumed that the user presses both the playback and recording controls 22 and 23 as shown in FIG. 6 without recording. Then, as shown in FIG. 8, the bottom surface of the second drive section 234 of the recording operator 23 presses the bottom surface of the recording drive member 43, causing the recording drive member 43 to rotate in the direction of arrow G. Therefore, the drive section 431 of the recording drive member 43 presses the recording slider 44 and is slid in the direction of arrow H. Here, the recording slider 44 turns on a recording/reproduction changeover switch (not shown) to put the circuit section into a recording state, and also brings the erasing head 32 (see FIG. 5) into contact with the tape. In the operating position of the recording operator 23, the bottom surface of the first driving section 232 is engaged with the engaging section 412 of the reproducing driving member 41 and locked.

On the other hand, when the playback operator 22 is operated, the recording/playback head 31 is brought into contact with the tape as described above, and the right pinch roller 33 is pressed against the right capstan 27 through the tape. It is what is done.

Here, the above-mentioned recording is, for example, a one-way recording of only the forward running state of the tape, the details of which will be described later.

Here, again, as shown in FIG. 4, approximately at the center of the main chassis 26 on the right side in the figure,
The motor 29 is installed, and this motor 2
A pulley 45 having a small diameter is fitted onto the rotating shaft 291 of the rotary shaft 9 . In addition, the above-mentioned right and left flywheels 4 are provided at the lower end of the main chassis 26 in the figure.
6, 47 are rotatably supported, and these include the right and left flywheels 46, 47 and the pulley 4.
5, a belt 49 is wound around it via an intermediate pulley 48 so that rotational force can be transmitted. Here, the rotation axes of the right and left flywheels 46, 47 are the right and left capstans 27, 28, respectively. And the above right and left flywheels 4
Gears 50 and 51 with small diameters are coaxially formed at 6 and 47, respectively. Here, among the right and left reel shafts 17 and 18 provided approximately in the center of the main chassis 26, the left reel shaft 18, which is on the winding side when the tape runs in the reverse direction, is connected to the main chassis 26 as shown in FIG. It is installed on 26. That is, a through hole 263 is formed in the main chassis 26 at a portion where the left reel shaft 18 is attached. Inside this through hole 263, there is a flange portion 53 having a substantially cylindrical shape and having a diameter larger than that of the through hole 263 at the lower part of the figure.
1 is inserted through the through hole 2.
The peripheral edge portion of 63 and the collar portion 531 are fixed. The rotation shaft 181 of the left reel shaft 18 is rotatably inserted into the bearing member 53.

Further, the portion of the rotating shaft 181 that protrudes above the bearing member 53 is inserted into the through hole 541 formed at the bottom of the bottomed cylindrical lock member 54, and then the reel cap 55 is fitted therein. There is. Here, this reel cap 55 is connected to the rotating shaft 18.
The lock member 54 is rotated integrally with the lock member 54.
is independent of the rotating shaft 181. Further, a coiled spring 56 is interposed between the upper end of the bearing member 53 and the lock member 54, and the rotating shaft 181 is attached upward through the lock member 54 and the reel cap 55. Forced. Further, at the lower end of the locking member 54, a pressing portion 542 and an engaging portion 543 are formed which are inclined in a predetermined direction. Of these, the pressing portion 542 is connected to the first switching slider 39.
The engaging portion 53 can be engaged with a lock slider, which will be described later.

Further, the portion of the rotating shaft 181 that protrudes below the bearing member 53 has a slightly smaller diameter, and a small-diameter gear 57 is fitted into this small-diameter portion. A large-diameter gear 58 is fitted into the lower end of the small-diameter gear 57 and is slidably provided in the axial direction with respect to the rotating shaft 181 . here,
This large-diameter gear 58 is urged upward by a coiled spring 59 interposed between it and a washer 182 attached to the lower end of the rotating shaft 181, and the small-diameter gear 57 It is fitted with the And the large diameter gear 58
A drive section 60 of a switching drive lever 60 rotatably supported by the main chassis 26 is provided on the top surface.
1 is engaged, and as the switching drive lever 60 rotates, the drive section 601 presses the large diameter gear 58 in the axial direction to engage it with the small diameter gear 57. It is designed to release the

Here, as shown again in FIG. 4, a shaft 264 is installed in the intermediate portion of the left reel shaft 18 of the main chassis 26 and the left flywheel 47. As shown in FIG. 8 again, a large-diameter gear 61 and a small-diameter gear 62 are rotatably supported on this shaft 264, respectively. A substantially ring-shaped friction member 63 is interposed between the large-diameter gear 61 and the small-diameter gear 62. Further, at the lower end of the small diameter gear 62 of the shaft 264,
A stopper 6 having a substantially cylindrical shape and having a collar portion 641
4 is fitted, and the collar 6 of this stopper 64
41, the small diameter gear 62 presses the large diameter gear 61 via the friction member 63, and the large diameter gear 61 and the small diameter gear 62 It is said that there is an interlocking relationship. Here, the large-diameter gear 61 is meshed with the gear 51 of the left flywheel 47 and can also be meshed with the small-diameter gear 57 of the left reel shaft 18. 62 is capable of meshing with the large-diameter gear 58 of the left reel shaft 18. The large diameter and small diameter gears 61 and 62 are selectively meshed with the small and large diameter gears 57 and 58 of the left reel shaft 18, respectively, so that the tape can be fixed in the opposite direction. In the fast running state, the small diameter gear 62 and the large diameter gear 57 of the left reel shaft 18
The large-diameter gear 61 and the small-diameter gear 58 of the left reel shaft 18 are in mesh with each other when the tape is rewinding.

On the other hand, among the right and left reel shafts 17 and 18, the right reel shaft 17, which is on the winding side when the tape runs in the forward direction, is installed on the main chassis 26, as shown in FIG. That is, a through hole 265 is formed in the main chassis 26 at a portion where the right reel shaft 17 is attached. A bearing member 66 having a substantially cylindrical shape and having a flange portion 661 with a larger diameter than the through hole 265 at the lower part of the figure is inserted into the through hole 265, and the peripheral edge of the through hole 265 and the flange portion 661 are inserted into the through hole 265. is fixed. The rotating shaft 171 of the right reel shaft 17 is rotatably inserted into the bearing member 66.

Further, the portion of the rotating shaft 171 that protrudes above the bearing member 66 is inserted through a through hole 671 formed at the bottom of the bottomed cylindrical lock member 67, and then the reel cap 68 is fitted therein. There is. Here, this reel cap 68 is connected to the rotating shaft 17.
The lock member 67 is rotated integrally with the lock member 67.
is independent of the rotating shaft 171.
A coiled spring 69 is interposed between the upper end of the bearing member 66 and the lock member 67, and the rotating shaft 171 is moved upwardly through the lock member 67 and the reel cap 68. energized. Furthermore, the lock member 67
A pressing part 672 inclined in a predetermined direction is provided at the lower end of the
and an engaging portion 673 are formed. Of these, the pressing portion 672 is capable of engaging with the engaging portion 42 formed on the second switching slider 40, and the engaging portion 673 is capable of engaging with a lock slider to be described later. ing.

Further, the portion of the rotating shaft 171 that protrudes below the bearing member 66 has a slightly smaller diameter, and a small-diameter gear 70 is fitted into this small-diameter portion. A large-diameter gear 71 is fitted into the lower end of the small-diameter gear 70 and is provided to be slidable in the axial direction with respect to the rotating shaft 171 . Here, this gear 71 with a large diameter is urged upward by a coiled spring 72 interposed between the rotary shaft 171 and a washer 172 attached to the lower end thereof. The fitting with the gear 70 is made. And the large diameter gear 71
A drive portion 73 of a switching drive lever 73 rotatably supported by the main chassis 26 is provided on the top surface.
1 is engaged, and as the switching drive lever 73 rotates, the drive member 731 presses the large diameter gear 71 in the axial direction to engage the small diameter gear 70. It is designed to be released.

Here, a shaft 26 is provided at an intermediate portion between the right reel shaft 17 of the main chassis 26 and the shaft 264.
6,267 plants have been planted. Of these, shaft 266
A gear 74 is rotatably supported on the shaft 264, and this gear 74 meshes with the small diameter gear 62 of the shaft 264. The gear 74 meshes with the large-diameter gear 70 of the right reel shaft 17 when the tape is running at a constant speed in the forward direction, and rotates the right reel shaft 17 at a constant speed. In addition, the gear 7
4 is because the large-diameter gear 71 of the right reel shaft 17, which will be described in detail later, is slid in the axial direction when the right reel shaft 17 is pressed and the tape is running at a constant speed in the reverse direction. The alignment is released.

On the other hand, a gear 75 is rotatably supported on the shaft 267, and this gear 75 is connected to the shaft 264.
It is meshed with a large diameter gear 61. The gear 75 meshes with the small diameter gear 70 of the right reel shaft 17 when the right reel shaft 17 is pressed, and rotates the right reel shaft 17 at high speed. .

Also, as shown in FIGS. 4 and 9 again, the right and left reel shafts 1 of the main chassis 26
A rotation shaft 268 is implanted in the intermediate portion of 7 and 18. The first and second switching sliders 39 and 40, each having a substantially L-shape, are supported on the rotation shaft 268 so that they can rotate independently of each other in a stacked state. At one end of the first switching slider 39, an engaging portion 39 is provided which is inclined to face the pressing portion 542 of the left reel shaft 18.
2 is formed, and a pressing portion 393 that protrudes opposite the right reel shaft 17 is formed.
This pressing portion 393 is connected to the right reel shaft 17.
The switching drive lever 73 is engaged with a protrusion 732 formed on the other end of the switching drive lever 73, which is engaged with the large diameter gear 71. Furthermore, the bending engagement portion 391 is formed at the other end of the first switching slider 39 to correspond to the first engagement piece 385 of the reproduction slider 38, as described above.

On the other hand, an engaging portion 402 is formed at one end of the second switching slider 40 and is inclined so as to face the pressing portion 672 of the right reel shaft 17, and also protrudes from the left reel shaft 18. Pressing part 40
3 is formed. And this pressing part 403
is engaged with a protrusion 602 formed on the other end of the switching drive lever 60, which is engaged with the large diameter gear 58 of the left reel shaft 18. Further, the bending engagement portion 401 is provided at the other end of the second switching slider 40, as described above, at the second switching slider 38.
It is formed corresponding to the engagement piece 386 of.

That is, the first and second switching sliders 3
Reference numerals 9 and 40 are rotated in conjunction with the pressing operation of the left and right reel shafts 18 and 17 to control the tape running system to a high speed running state, and also to control the playback strider 38 in the operating state of the auto-reverse mechanism described later. It is rotated in conjunction with the slide of the tape drive system to control the tape running system to a constant speed running state. For example, when the right reel shaft 17 is pressed, the right reel shaft 1
The small and large diameter gears 70 and 71 of 7 are the rotating shaft 17.
1, the gear 70 with the smaller diameter is meshed with the gear 75 and is ready for high speed rotation. At this time, the above right reel shaft 1
The pressing portion 672 at No. 7 presses the engaging portion 402 of the second switching slider 40 to rotate it counterclockwise in the figure. Here, the switching drive lever 60 that engages with the large-diameter gear 58 of the left reel shaft 18 is pressed by the pressing portion 403 of the second switching slider 40 and rotated.
For this reason, the large diameter gear 58 is slid in the axial direction by the switching drive lever 60 to release the meshing with the small diameter gear 62.

Further, as shown in FIGS. 12 and 13, when the left reel shaft 18 is pressed, the left reel shaft 1
8 small and large diameter gears 57 and 58 are the rotating shaft 18
1, the gear 57 with the smaller diameter meshes with the gear 61 with the larger diameter, making it possible to rotate at high speed. At this time, the pressing portion 542 of the left reel shaft 18 is connected to the first switching slider 3.
9 and rotate it clockwise in the figure. Here, the large diameter gear 7 of the right reel shaft 17
The switching drive lever 73 that engages with the first switching slider 39 is pressed by the pressing portion 393 of the first switching slider 39 and rotated. Therefore, the gear 71 with a large diameter is slid in the axial direction by the switching drive lever 73 to release the gear 74 from meshing with the gear 74.

Here, as shown in FIG. 14, when the reproduction slider 38 is slid the most in the direction of arrow E, the second switching slider 40 moves its bending engagement portion 391 to the second position of the reproduction slider 38. It is urged by the engagement piece 386 and rotated counterclockwise in the figure. At this time, as shown in FIG. 15, the switching drive lever 60 that engages with the large-diameter gear 58 of the left reel shaft 18 has its protrusion 602 pressed by the pressing part 403 of the second switching slider 40. Rotated. Therefore, the large-diameter gear 58 is driven by the rotating shaft 18 by the drive section 601 of the switching drive lever 60.
1 in the axial direction, and the meshing with the small diameter gear 62 is released. On the other hand, since the bending engagement portion 391 of the first switching slider 39 is disengaged from the first engagement piece 385 of the reproduction slider 38, the large-diameter gear 7 of the right reel shaft 17
1, the meshing state with the gear 74 is maintained, and the right reel shaft 17 is allowed to rotate at a constant speed.

Further, as shown in FIG. 16, when the playback slider 38 is slid the most in the direction of arrow F, the first switching slider 39 moves its bending engagement portion 391 into the first engagement position of the playback slider 38. Piece 38
5 and rotated clockwise in the figure. At this time, as shown in FIG.
A switching drive lever 73 that engages with a large diameter gear 71
is rotated by having its projection 732 pressed by the pressing portion 393 of the first switching slider 39 . Therefore, the large-diameter gear 71 is slid in the axial direction with respect to the rotating shaft 171 by the drive portion 731 of the switching drive lever 73, and the meshing with the gear 74 is released. On the other hand, the second switching slider 4
0, the bending engagement portion 401 is not engaged with the second engagement piece 386 of the reproduction slider 38, so the large diameter gear 58 of the left reel shaft 18 is in contact with the small diameter gear 62. The meshing state is maintained and the left reel shaft 18 is allowed to rotate at a constant speed.

Also, as shown in FIG. 4 again, a rotation shaft 268 is installed approximately in the center of the main chassis 26, and a lock slider 76 and a switch slider 77 are respectively rotated on this rotation shaft 268. freely supported. Of these, the lock slider 76 is the first drive section 2 of the playback operator 22.
23, engages with the engaging portions 673, 543 of the right and left reel shafts 17, 18, a drive portion (not shown) of the stop operator 21, and an engaging portion 781 formed on the number of times limit slider 78, which will be described later. The first to fifth engaging portions 761 to 765 to be obtained are formed to expand around the rotation axis 269. The switch slider 77 has substantially the same shape as the lock slider 76 and is provided to overlap the lock slider 76.
2, the engaging portions 673, 543 of the right and left reel shafts 17, 18, the driving portion of the stop operator 21, and the number limit slider 78.
First to fifth engaging portions 771 to 775 that can be engaged with the engaging portion 781 of the first to fifth engaging portions 771 to 775 are formed. moreover,
Third engaging portion 773 of the switch slider 77
A sixth engaging portion 776 that engages with a switch (not shown) for supplying power to the motor 29 is formed at the tip. Then, with the switch slider 77 rotated counterclockwise in FIG. 4, the switch is turned on by the sixth engaging portion and the motor 29 is rotationally driven. Further, the lock slider 76 and the switch slider 77 have protruding locking pieces 766,
777 is formed. By engaging the springs 79 and 80 with these protruding locking pieces 766 and 777 and predetermined positions of the main chassis 26, the lock slider 76 and switch slider 77 are rotated clockwise in FIG. 4, respectively. energized. For this reason, the lock slider 7
The first to fifth engaging parts 761 to 765 and the first to fifth engaging parts 771 to 775 of the switch slider 77 and the first driving part 223 of the playback operator 22, the right and left reel shafts, respectively. 17,1
8, the driving part of the stop operator 21, and the engaging part 781 of the number limit slider 78.

In the above configuration, when the playback operator 22 is operated to play back a tape, the head chassis 35 is moved as described above, the recording/playback head 31 is brought into contact with the tape, and the right and left pinch rollers 33, 34 are selectively pressed against the right and left capstans 27 and 28 via tape. At this time, the lock slider 76 and the switch slider 77 are moved by the first driving section 223 of the playback operation element 22 to the first engaging sections 761, 771.
is pressed and rotated counterclockwise in FIG. 4 against the urging force of springs 79 and 80. and,
When the playback operation element 22 is in the pressing operation position, the first engaging portion 761 of the lock slider 76 opposes the bottom surface portion of the first drive portion 223. Therefore, the lock slider 76 has a spring 79.
The playback operator 22 is rotated clockwise in FIG. 4 by the biasing force of , and the first engaging portion 761 engages with the bottom surface portion of the first driving portion 223, thereby locking the playback operator 22. . At this time, the switch slider 7
7, the first engaging portion 771 is connected to the playback operator 22.
Since the motor 29 is maintained in a pressed state by the first driving section 223, the switch is turned on and the motor 29 is rotated clockwise in FIG. 4 as described above.

Therefore, the right and left flywheels 46, 47 are rotated counterclockwise and clockwise, respectively.
At this time, when the reproduction slider 38 is slid in the direction of the arrow E, the second switching slider 40 is rotated counterclockwise in FIG. 4 as described above. Therefore, the rotational force of the left flywheel 47 is applied to the gear 51, the large diameter gears 61, and the small diameter gears 61, 6.
2. Gear 74, large diameter gear 71 of right reel shaft 17
The signal is then transmitted at a constant speed to the reel cap 68 via the rotating shaft 171, and the tape is played back in the forward direction. Further, when the reproduction slider 38 is slid in the direction of the arrow F, the first switching slider 39 is rotated clockwise in FIG. 4 as described above. Therefore, the rotational force of the left flywheel 47 is applied to the gear 51, the large diameter gears and the small diameter gears 61, 62,
Large diameter gear 58 of left reel shaft 18 and rotating shaft 18
1 to the reel cap 55 at a constant speed, and the tape is played back in the reverse direction.

Next, it is assumed that the fast-forwarding operator 19 is pressed to fast-forward the tape. Then, since the reel cap 68 of the right reel shaft 17 is pressed, the lock member 67 is slid in the axial direction against the biasing force of the spring 69. The locking member 67 is moved in the axial direction until its lower end abuts against the flange 661 of the bearing member 66. In this state, the second engaging part 772 of the switch slider 77 is pressed by the engaging part 673 of the locking member 67, and the switch slider 77 is rotated counterclockwise in FIG. A second engagement portion 762 of the lock slider 76 is engaged with an engagement portion 673 of the lock member 67. Therefore, a switch for supplying power to the motor 29 is turned on, and the right reel shaft 17 is locked at the operating position. At this time, as the right reel shaft 17 is pressed, its rotating shaft 171 is slid in the axial direction, so that
The small diameter gear 70 fitted on the rotating shaft 171 is slid in the same direction as the large diameter gear 71. Therefore, the gear 71 with the larger diameter is disengaged from the gear 74, and the gear 70 with the smaller diameter is meshed with the gear 75. Further, as the right reel shaft 17 is pressed, the pressing portion 672 of the locking member 67 presses the engaging portion 402 of the second switching slider 40 as described above. The switching slider 40 of No. 2 is rotated counterclockwise in FIG. Therefore, the second switching slider 40 rotates the switching drive lever 60 by pressing the projection 602 of the switching drive lever 60 that engages the large-diameter gear 58 of the left reel shaft 18 with its pressing part 403. make it move. and,
By the driving portion 601 of the switching drive lever 60, the large diameter gear 58 is slid in the axial direction with respect to the rotating shaft 181, and is disengaged from the small diameter gear 62. Therefore, the rotational force of the left flywheel 47 is applied to the gear 51, large diameter gears 61, and small diameter gears 61, 6.
2. Gear 75, small diameter gear 70 of right reel shaft 17
The tape is then transmitted at high speed to the reel cap 68 via the rotating shaft 171, and the tape is fast-forwarded.

It is also assumed that the rewind operator 20 is pressed to rewind the tape. Then, since the reel cap 55 of the left reel shaft 18 is pressed, the lock member 54 is slid in the axial direction against the biasing force of the spring 56. The locking member 54 is moved in the axial direction until its lower end comes into contact with the flange 531 of the bearing member 53. In this state, the third engaging part 773 of the switch slider 77 is pressed by the engaging part 543 of the locking member 54, and the switch slider 77 is rotated counterclockwise in FIG. The third engagement portion 763 of the lock slider 76 is engaged with the engagement portion 543 of the lock member 54. Therefore, a switch for supplying power to the motor 29 is turned on, and the left reel shaft 18 is locked at the operating position. At this time, as the left reel shaft 18 is pressed, the rotating shaft 181 is slid in the axial direction, so that the small diameter gear 57 fitted to the rotating shaft 181 is rotated.
are slid in the same direction together with the large-diameter gear 58. Therefore, the gear 58 with a large diameter is replaced by the gear 62 with a small diameter.
The smaller diameter gear 57 meshes with the larger diameter gear 61. Further, as the left reel shaft 18 is pressed, the pressing portion 542 of the locking member 54 presses the engaging portion 392 of the first switching slider 39 as described above. 1
The switching slider 39 is rotated clockwise in FIG. Therefore, this first switching slider 39
The pressing portion 393 presses the protrusion 732 of the switching drive lever 73 that engages with the large-diameter gear 71 of the right reel shaft 17, thereby rotating the switching drive lever 73. The large-diameter gear 71 is driven by the drive portion 731 of the switching drive lever 73 to rotate the rotation shaft 1.
It is slid in the axial direction with respect to 71 and is disengaged from the gear 74. Therefore, the rotational force of the left flywheel 47 is generated by the gear 51, the large diameter and small diameter gears 61, 62, and the small diameter gear 57 of the left reel shaft 18.
The tape is then transmitted at high speed to the reel cap 55 via the rotating shaft 181, and the tape is rewinded.

Here, a case will be described in which the stop operator 21 is operated in the above-described playback, fast-forwarding, and rewinding states. That is, as described above, the stop operation element 21 is installed in the cassette holder 30 so that it can be pressed freely, and the stop operation element 21 has a lower end that can be engaged with the fourth engaging part 764 of the lock slider 76. A driving section is formed. And play,
In the fast forward and rewind states, each operator 22, 1
9 and 20 are first to third engaging portions 761 to 76 of the lock slider 76 in the operating position, respectively.
3, the first drive part 223 and the locking member 6
The engaging portions 673 and 543 of 7 and 54 are locked. Therefore, when the stop operator 21 is pressed, the lock slider 76 has its fourth engaging portion 764 pressed by the driving portion of the stop operator 21 and is rotated counterclockwise in FIG. Ru. For this reason, the playback, fast forward and rewind operators 22, 1
Numerals 9 and 20 are respectively unlocked and brought to a stopped state.

In this way, the tape running system is switched by the small and large gears 70 of the right and left reel shafts 17, 18,
71, 57, and 58 are configured to slide approximately perpendicularly to the main chassis 26.
Therefore, each gear of the tape running drive system is supported in a position approximately parallel to the main chassis 26, so the meshing relationship of each gear is stable, the rotational force is efficiently transmitted, and the number of parts is reduced, making it compact. It is possible to promote the development of

By using the first and second switching sliders 39 and 40, which change the traveling system to fast-forward and rewind states, to switch the traveling system in the playback state, the number of parts is reduced and downsizing is promoted. It is possible.

A tape end detection mechanism for detecting when the tape reaches the end in the above-described playback state will now be described. That is, FIGS. 4 and 17
As shown in Figures a and b, one end of a friction lever 81 is provided on the lower end surface of the small diameter gear 62 via a well-known friction mechanism. The friction lever 81 is biased in the direction of rotation when the small diameter gear 62 is rotated. A long hole 811 is formed at the other end of the friction lever 81, and a pin 8 is protruded into the long hole 811 from the tip of one end of the substantially L-shaped detection lever 82.
21 is loosely fitted. This detection lever 82 is
The cam portion 611 is rotatably supported by a shaft 822 protruding from the main chassis 26 at its substantially central portion, and the inner portion of the base at one end thereof is formed into the large-diameter gear 61. Abuts on the side. Further, a protrusion 823 is formed at the base of one end of the detection lever 82, and this protrusion 823 can engage with the curved operating wall 612 formed on the flat surface of the large-diameter gear 61. It is said that Further, first and second engaging portions 824 and 825 are formed at the other end of the detection lever 82 . Of these, the first engaging portion 824 is capable of engaging with a bending engaging portion 782 formed on the number-of-times limiting slider 78 (described later), and the second engaging portion 825 is capable of engaging with a reverse drive lever (described later). It can be engaged with a bending engagement portion 831 formed at 83.

That is, in the tape playback state described above, the left flywheel 47 and the gear 51 are rotated clockwise in FIG. be rotated. Therefore, the friction lever 81 is urged in the same direction by the rotational force of the gear 61 with the small diameter, and the detection lever 82 is also urged in the same direction about the shaft 822. At this time, the detection lever 82 has an inner side of its base in sliding contact with the cam part 611, so that the shaft 8
Since the oscillating motion is performed around 22, a stable tape running state at a constant speed is maintained. For example, when the tape reaches the end in a state where the tape is traveling at a constant speed in the forward direction, the rotation of the right reel shaft 17 is stopped, thereby causing the large diameter gear 71 and gear 74 of the right reel shaft 17 to The rotation of the small gear 62 is stopped. Therefore, slippage occurs between the gear 62 with the smaller diameter and the gear 61 with the larger diameter. At this time, due to the rotation of the small diameter gear 62 being stopped, no biasing force is applied to the friction lever 81 and the detection lever 82. On the other hand, the large diameter gear 61
As the rotation continues, the cam portion 611 is also rotated. Therefore, the detection lever 82
As the cam portion 611 rotates, it is rotated clockwise in FIG. 4 about the shaft 822 by the length of the maximum diameter of the cam portion 611, and is stopped at that position. Then, as the large-diameter gear 61 rotates, the detection lever 82 is further rotated clockwise in FIG. It is rotated by. At this time, the detection lever 82
The first and second engaging portions 824 and 825 actuate the number of times limit slider 78 and reverse drive lever 83, which will be described in detail later.

Further, even in the tape playback state in the reverse direction, the end of the tape is reliably detected in substantially the same manner as in the above-mentioned forward tape playback state, and the explanation thereof will be omitted here.

Next, an auto-reverse mechanism for reversing the tape running direction in response to the above-mentioned tape end detection mechanism during tape playback will be described. That is, as shown in FIG. 4 again, a gear 50 is formed coaxially and integrally with the right flywheel 46. This gear 50 is the right flywheel 4
6 and the rotational force of the motor 29 is transferred to the belt 49.
is transmitted through the right capstan 2.
7 in the counterclockwise direction in the figure. A shaft 841 is installed on the left side of the gear 50 of the main chassis 26 in the figure, and a reverse drive gear 84 is rotatably supported on the shaft 841 so as to be able to mesh with the gear 50. .
As shown in FIG. 18a, this gear 84 has a pair of notches 842 and 843 formed at predetermined positions facing each other and which do not mesh with the gear 50. Further, a substantially disc-shaped guide portion 844 is protruded from one side of the gear 84, and this guide portion 844 has substantially V-shaped locking portions facing each other corresponding to the notches 842, 843. Grooves 845 and 846 are formed. Furthermore, protrusions 847 and 848 are formed on one side of the gear 84 and protrude in a substantially triangular shape, facing the locking grooves 845 and 846. A cam part 85 is formed on the upper surface of the guide part 844 and has a flat part 851 in a part and a curved part in the shape shown in the figure. It is inserted into a substantially rectangular translucent L386 formed in . Bent pressing parts 387 and 388 which are inclined so as to be able to engage with the maximum diameter part of the cam part 85 are formed on this transparent element L386 on opposite sides in the figure.

Here, the guide portion 844 includes a guide pin 83 formed at one end of the reverse drive lever 83.
2 is brought into contact. This reverse drive lever 83
The intermediate portion thereof is rotatably supported by the main chassis 26, and is biased clockwise in the drawing by a spring (not shown). Also,
The reverse drive lever 83 has the bent engagement part 825 that can be engaged with the second engagement part 825 of the detection lever 82 at the other end. The other end of the reverse drive lever 83 is engaged with the manual reverse operator 24.
It is designed to be rotated counterclockwise in the figure in response to the operation.

That is, when the tape reaches its end in the tape playback state, the tape end detection mechanism detects this as described above and rotates the detection lever 82 clockwise in FIG. 4. Therefore, the second engaging portion 825 of the detection lever 82 presses the bent engaging portion 831 of the reverse drive lever 83, causing the reverse drive lever 83 to move as shown in FIG. 18a. Rotate counterclockwise. On this occasion,
The guide pin 832 of the reverse drive lever 83 presses one side of the protrusion 847 of the gear 84, causing the gear 84 to rotate slightly clockwise in the figure. Therefore, this gear 84 is meshed with the gear 50 of the right flywheel 27 and rotated, as shown in FIG. 18b. Therefore, as shown in FIG. 18c, the reverse drive lever 83 is guided by the other protrusion 848 while its guide 832 is in sliding contact with the guide part 844, and the reverse drive lever 83 is engaged with another locking part as shown in FIG. 18d. It is locked in the groove 846. At this time, the cam portion 85 of the gear 84 is rotated in the same direction as the gear 84 rotates, so that the reproduction slider 38
The bending engagement portion 387 or 288 is pressed to move the reproduction slider 38 in the direction of arrow F or E. Therefore, the reproduction slider 38 operates the first or second switching slider 39, 40 as described above to switch the state of tape running in the forward or reverse direction. Here, the gear 84 has one of its notches 845 and 846 opposed to the gear 50 of the right flywheel 27, and its rotation is stopped.

Further, the reverse drive lever 83 is not operated only by the detection lever 82 described above, but is operated counterclockwise in the figure in conjunction with the operation of the manual reverse operator 24, as shown in FIGS. 19a and 19b. The tape running direction can be changed in substantially the same manner as described above.

Here, even if the manual reverse operator 24 is continuously pressed as shown in FIG. 19b, the guide pin 83 of the reverse drive lever 83
2 is not locked by the other protrusion 848 of the gear 84 to continue the next switching operation, which prevents erroneous operation and improves usability.

The reverse drive gear 84 is configured to be started by the pressing force of the reverse drive lever 83 and then rotated by a half turn by the gear 50 of the right flywheel 27. For this reason, the gear 8
4, there is no need to provide a starting member such as a spring, which reduces the number of parts and simplifies the configuration.

Further, since no biasing force is applied to the gear 84, its rotation is performed efficiently, so that the load on the motor 29 can be reduced, and power consumption can be reduced.

Further, as shown in FIG. 20a, a muting switch 86 is installed in the main chassis 26 in correspondence with the reverse driving gear 84 for performing muting when switching the tape running direction. In other words, this muting switch 8
6 is installed corresponding to one side of the gear 84, and is electrically connected to a circuit section (not shown). And the above-mentioned muting switch 86
, the movable contact 861 is connected to the projections 847, 8
48, the reverse drive lever 83 is provided corresponding to one of the reverse drive levers 83 located on the side opposite to the guide pin 832. Therefore, when the gear 84 starts rotating as described above, the movable contact 861 of the mutating switch 86 is turned on by being pressed against the protrusion 848 for several seconds, as shown in FIG. Muting is done in this way. Here, the mutating switch 86 is turned off as shown in FIG. 19c when the switching of the mechanism is completed as the gear 84 rotates thereafter.

Since the muting switch 86 is configured to be turned on and off directly by the reverse drive gear 84, its operation can be ensured and its configuration can be simplified.

Further, since the mutating switch 86 is turned on by being pressed by one of the protrusions 847 and 848 formed on the gear 84, the timing can be adjusted very easily.

Here, as shown in FIG. 4 again, a shaft 783 is installed in the lower left portion of the main chassis 26 in the figure. As shown in FIG. 21a, this shaft 783 rotatably supports an intermediate portion of the number-limiting slider 78, and one end of the shaft 783 protrudes from the side of the cassette holder 30 to move the number-limiting switch 87. (See Figure 4). Further, at the other end of the number-of-times limiting slider 78, a drive section 784 is provided, the approximate center of which is rotatably supported. The driving portion 784 is formed with the bending engaging portion 782 at one end so as to be able to engage with the first engaging portion 824 of the detection lever 82, and at the other end thereof. A portion 781 is formed so as to be able to engage with the fifth engaging portion 765 of the lock slider 76. Further, the number of times limit slider 78 is formed with an engaging portion 785 corresponding to the recording slider 44, the details of which will be described later.

Here, the number of times limit switch 87 is slidable in the directions of arrows E and F. When the number of times limit switch 87 is slid in the direction of arrow F, the number of times limit slider 78 is rotated clockwise in the figure as shown in FIG. The portion 781 is placed in a state where it does not face the first engaging portion 824 of the detection lever 82 and the fifth engaging portion 765 of the lock slider 76. Further, as shown in FIG. 22a, when the number of times limit switch 87 is slid in the direction of arrow E, the number of times limit slider 78 is rotated counterclockwise in the figure, and its bent engagement portion 782 and engagement The portion 781 faces the first engaging portion 824 of the detection lever 82 and the fifth engaging portion 765 of the lock slider 76, and is in an engageable state.

That is, when the tape reaches the end in the tape playback state, the detection lever 82 is operated and rotated clockwise in the figure as described above. At this time, for example, when the number of times limit switch 87 is slid in the direction of arrow F, the bending engagement portion 782 of the number of times limit slider 78 slightly touches the first engaging portion 824 of the detection lever 82, as shown in FIG. 21b. The drive portion 784 is rotated slightly by engaging and pressing. However, since the engaging portion 781 of the number-limiting slider 78 does not face the fifth engaging portion 765 of the lock slider 76, the lock slider 76 cannot be locked by the regeneration operator 22 and the first drive portion 223. It does not have to be rotated in the direction of release. On this occasion,
The detection lever 82 has its second engaging portion 825
As described above, the tape running direction is switched by pressing the bending engagement portion 831 of the reverse drive lever 83.

Here, when the number of times limit switch 78 is slid in the direction of arrow F, the tape running direction is permanently switched when the tape reaches the end.

Further, when the number of times limit switch 78 is slid in the direction of arrow E, the bent engagement portion 782 of the number of times limit slider 78 faces the second engagement portion 824 of the detection lever 82, as shown in FIG. 22a. be done. Therefore, as the detection lever 82 rotates clockwise in the figure, the number-of-times limiting slider 78 is bent at its bent engagement portion 78 as shown in FIG. 22b.
2 is pressed, the drive unit 784 is rotated counterclockwise in the figure. Here, the engaging portion 7 of the driving portion 784
81 is the fifth engaging portion 765 of the lock slider 76
is pressed, and the lock slider 76 is rotated counterclockwise in the figure, so that the first drive section 223 of the playback operation element 22 is unlocked and brought to a stopped state. At this time, the detection lever 82
The second engaging portion 825 rotates the reverse drive lever 83 counterclockwise in the figure in the same way as described above, so that the tape running direction can be switched as described above.

In this way, by equipping the gears 61 and 62 with large and small diameters that selectively rotate the right and left reel shafts 17 and 18 according to the tape running direction with the tape end detection mechanism, the end can be detected. This is reliable, reduces the number of parts, and promotes downsizing.

In the reproduction state, the tape running system is configured to be reversed when automatically stopped by the rotation restriction slider 78. Therefore, when the playback operator 22 is operated again, playback is performed from the state in which the mechanism section is inverted, which eliminates the trouble of changing tape cassettes and simplifies the operation.

Next, the control mechanism of the recording system, which has been omitted from FIG. 4 for convenience of illustration, will be explained. That is, in FIG. 23, numeral 44 is a recording slider that is slid as described above in conjunction with the pressing operation of the recording operator 23. This recording slider 44 is slidably supported in the directions of arrows C and D by a shaft 442 installed in the main chassis 26 and a shaft 841 on which the reverse drive gear 84 is supported. Further, an engaging portion 443 inclined in the direction of arrow D is formed at the lower part of the shaft 442 of the recording slider 44, and an engaging portion 785 of the number of times limit slider 78 is engaged with this engaging portion 443. will be combined. Furthermore, a rotating shaft 4 is provided at the bottom of the shaft 841 of the recording slider 44.
45 is attached, and one end of a recording control member 88 is rotatably supported on this rotation shaft 445. A spring 89 is engaged between the recording control member 88 and the recording slider 44 so as to apply a biasing force to the recording control member 88 in the counterclockwise direction in the figure. Further, a protrusion 881 is formed at the other end of the recording control member 88, and this protrusion 881 is engaged with a notch engaging portion 446 formed on the recording slider 44. Further, a pressing engagement portion 882 is formed in the middle portion of the recording control member 88, and this pressing engagement portion 882 is engaged with a protrusion 849 formed on the reverse drive gear 84. Here, the protrusion 849
is formed to correspond to the cam portion 85 of the gear 84, and is interlocked with the recording slider 44 to press and engage the pressing engagement portion of the recording control member 88 when the tape traveling system is running in the reverse direction. 882.

By the way, when you operate both the playback and recording operators 22 and 23 while trying to record, the recording slider 44 moves in conjunction with the recording operator 23 as described above.
is slid in the direction of arrow C to put the circuit section into a recording state, and at the same time, the erasing head 32 is brought into contact with the tape. On the other hand, the recording/reproducing head 31 is brought into contact with the tape in conjunction with the playback operator 22, and the right pinch roller 33 is necessarily pressed against the right capstan 27 through the tape, thereby performing one-way recording.

That is, when the traveling system is running in the reverse direction as shown in FIG. 23, the playback and recording controls 22 and 23 are turned on without recording as shown in FIG. 24a.
When both are operated, the recording slider 44 is first slid in the direction of arrow C. At this time, the recording control member 88 is slid in the same direction, and its pressing engagement portion 882 is engaged with the protrusion 849 of the gear 84, so that the protrusion 881 is pushed into the notch engagement portion 446 of the recording slider 44. It becomes a state separated from. Therefore, the protruding portion 849 of the gear 84 is pressed against the pressing engagement portion 882 of the recording control member 88 by the biasing force of the spring 89, and is slightly rotated clockwise in the figure. Therefore, as shown in FIGS. 24b, c, and d, this gear 84 meshes with the gear 50 of the right capstan 27 and makes a half turn to bring the running system into the forward running state as described above. .

On the other hand, when the recording slider 44 slides in the direction of arrow C, its engaging portion 443 presses the engaging portion 785 of the number control slider 78 to rotate it counterclockwise in the figure. Therefore, as described above, the number of times limiting slider 78 is
2 and the engaging part 781 are the first part of the detection lever 82.
and the fifth engaging portion 765 of the lock writer 76. Therefore, as described above, when the tape reaches its end, the detection lever 82 is rotated to operate the number limit slider 78, and the recording state is automatically stopped.

Further, when the recording slider 44 is slid in the direction of arrow C as described above while the tape running system is running in the forward direction, the recording control member 88
, the pressing engagement portion 882 is connected to the protrusion 8 of the gear 84.
Since it is not opposed to 49, it is not engaged as described above. Therefore, the recording control member 88 is slid in the direction of arrow C together with the recording slider 44 with its protrusion 881 engaged with the notch engaging portion 446 of the recording slider 44. Here, the gear 84 is maintained in a stable state without being subjected to the biasing force of the spring 89.
The recording will be made once.

In this manner, the above-mentioned cassette tape recorder device organically couples the number-limiting slider 78, which realizes forward and reverse running modes of the tape, to the detection lever 82, which constitutes a tape end detection mechanism that controls the operation of the reverse drive lever 83. Then, in response to the detection of the end of the tape by the detection lever 82 while the number limit slider 78 is being operated, the tape is played back once in each direction and tape running is stopped to perform reverse switching. By organically coupling the tape to the tape, it is configured to perform one-way recording in the tape forward running mode in the recording state. According to this, in a small portable tape recorder, the required usability of one-way playback and recording can be achieved while maintaining a small size that makes it comfortable to carry, and the handling and operability of the tape recorder can be improved. .

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a cassette tape recorder device that has a simple structure, can be downsized, and can be easily handled.

[Brief explanation of drawings]

FIG. 1a is a plan view showing a cassette tape recorder device according to an embodiment of the present invention, FIG. 1b is a side view of FIG. 1a, and FIG. FIG. 3 is a perspective view showing the cassette holder shown in FIG. 2 in an open state, FIG. 4 is a plan view showing the structure of the mechanism in FIG. 1a, and FIG. 5 is a reproduction FIG. 6 is a perspective view showing the operating state of FIG. 5, FIG. 7 is a sectional view showing a part of FIG. 5, and FIG. Sectional view showing a part of Figure 6, No. 9
The figure is a cross-sectional view showing the mechanism part in Figure 1a running at a constant speed in the reverse direction, and Figures 10 and 11 are respectively
12 and 13 are a cross-sectional view and a plan view showing the mechanism section in FIG. 1a in a fast forward running state, and FIG. Figure 15 is Figure 1a, respectively.
16 is a plan view and a cross-sectional view showing the mechanism section of FIG. 1a in a constant speed running state in the reverse direction, and FIGS. 1A is a plan view and a sectional view showing the tape end detection mechanism; FIGS. 18A to 18D are plan views showing the operation of the drive system of the reverse mechanism in FIG. 1A;
Figures 19a and 19b are operation explanatory views showing the relationship between the manual reverse operator and reverse drive lever in Figure 1a, respectively, and Figures 20a, b, and c are plane views showing the muting operation in Figure 1a, respectively Figure, 2nd
Figures 1a and 1b are plan views showing the operation of the mechanism in Figure 1a in the reverse state, Figures 22a and 22b, respectively.
b is a plan view showing the operation of the mechanism section in FIG. 1a in the automatic stop state, and FIG.
2nd plan view showing the recording system of the mechanism section of
4a to 4d are plan views showing the operation of FIG. 23, respectively. 11...cabinet, 12...cassette lid,
13... Tape cassette, 14... Storage section, 15
...Mechanism storage section, 16...Head section, 17...Right reel shaft, 18...Left reel shaft, 19...Fast forward operator, 20...Rewind operator, 21...Stop operator, 22... ...Playback controls, 23...Record controls, 24...Manual reverse controls, 25...
Window section, 26...Main chassis, 27...Right capstan, 28...Left capstan, 29...Motor, 30...Cassette holder, 31...Recording/playback head, 32...Erasing head, 33...Right pinch roller , 34... Left pinch roller, 35... Head scene, 36... Right pinch lever, 362... Drive unit, 37... Left pinch lever, 373... Drive unit, 38... Playback slider, 39... First switching slider, 40... second switching slider, 41...
... Reproduction drive member, 42 ... Bearing member, 43 ... Recording drive member, 44 ... Recording slider, 45 ... Pulley, 46 ... Right flywheel, 47 ... Left flywheel, 48 ... Intermediate pulley, 49 ... Belt, 50 ... Gear, 51 ... Gear, 53 ... Bearing member, 54 ... Lock member, 55 ... Reel cap, 56 ... Spring, 57 ... Small diameter gear, 58 ... Large diameter gear, 59...spring,
60...Switching drive lever, 61...Large diameter gear,
62...Small diameter gear, 63...Friction member, 64...
... Stopper, 65 ... Spring, 66 ... Bearing member, 67 ... Lock member, 68 ... Reel cap, 69 ... Spring, 70 ... Small diameter gear,
71...Large diameter gear, 72...Spring, 73
...Switching drive lever, 74 ... Gear, 75 ... Gear, 76 ... Lock slider, 77 ... Switch slider, 78 ... Number of times limit slider, 79 ...
Spring, 80... Spring, 81... Friction lever, 82... Detection lever, 83... Reverse drive lever, 84... Gear, 85... Cam portion, 8
6... Muting switch, 87... Number of times limit switch, 88... Recording control member, 89... Spring.

Claims (1)

[Scope of Claims] 1. A first rotating body (27) that rotates independently of tape running, and is engaged with the first rotating body so as to be capable of transmitting rotational force with a non-engaging portion; A second drive for reverse drive that controls tape running by switching between forward and reverse running modes.
a rotating body (84); a tape end detection mechanism (61, 81, 82) for detecting the end of the tape wound on the cassette; a reverse drive member (83) that engages the first rotary body with the tape end detection mechanism, the reverse drive member (83) is configured to detect the end of the tape when the tape runs one-way in forward or reverse running mode at the operating position; a number control member (78) for controlling the tape running system to a stopped state in response to a recording operation; and a number control member (78) that is operated in conjunction with a recording operation to cause the second rotating body to rotate in the first rotating state when the tape is in a reverse tape running mode. and a recording operation mechanism 44, 88 that includes a control member that is engaged with the body and controls the forward running mode of the tape and controls the number of times controlling member to an operating position, and when the number of times limiting member is operated in the tape playback state, A cassette tape recorder device characterized in that it performs a one-way playback operation and also performs reverse mode switching, and in a tape recording state, performs one-way recording in a tape forward running mode.