JPS5994263A - Cassette tape recorder device - Google Patents

Abstract

PURPOSE:To obtain a cassette tape recorder device of simple constitution which can be miniaturized with high operability by providing a cam part which switches the tape traveling between forward and reverse directions and a frequency limiting member which limits the reverse action to a one-way action in response to a sound record operator. CONSTITUTION:In a reverse traveling mode of a traveling system, both record and reproduction operators 22 and 23 are operated for sound recording. Then a sound record slider 44 is first slid toward an arrow C, and a gear 84 meshes with a gear 50 of a right capstan 27 to have a half revolution. Thus a traveling system is driven forward. While a hooking part 785 of a frequency limit slider 78 is pressed to have the counterclockwise revolution. When a tape reaches its end, a detection lever is turned to actuate the slider 78. Then a sound record mode is automatically discontinued.

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 have become smaller and lighter, making them more portable, and 2-way stereo types have become popular, especially for playback using headphones.
For example, it is possible to enjoy tape playback while walking by wearing headphones. Such portable headphone-only cassette tape recorders have already been made as small as possible, and at present are approximately the same size as a cassette case that houses a tape cassette.

By the way, the next requirement for this type of miniaturized cassette tape recorder is to improve usability by organically connecting each mechanical part and adding an IJ parsing function and a recording function, as well as improving the power consumption. Power saving measures should be taken to reduce consumption.

However, it has been difficult to add the above-mentioned requirements to a cassette tape recorder that is intended for 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 configuration more complex and larger. ◎ However, it has become possible to promote miniaturization, control each mechanism SF in an organic, lean configuration, and take power-saving measures to reduce power consumption, and make it cheaper. This is requested.

[Purpose of the invention]

This invention was made in view of the above circumstances, and is an extremely good cassette tape recorder system that has a simple structure, can be downsized, and has good operability! 'The purpose is to provide.

[Summary of the invention]

That is, the present invention includes a first rotating body that rotates independently of tape running, and a reverse drive that is engaged with the first rotating body so as to be able to transmit rotational force with a portion that is not engaged with the first rotating body. a control member that is driven in conjunction with the operation of the recording operation member; an engaging part that rotates the second rotating body in a direction in which it engages with the first rotating body; a cam part formed on the second rotating body that switches tape running between forward and reverse directions; and a recording operator. The present invention is characterized by comprising a number-of-times limiting member that limits the reverse operation to one one-way operation in conjunction with the reverse operation.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. Figures 1(a) and (b) are, respectively,
1 shows a front and side view of a cassette tape recorder to which the present invention is applied. That is, 11
A cabinet 11 is approximately box-shaped and has approximately the same size as a cassette case for storing tape cassettes, and one plane portion of this cabinet 11 serves as a cassette lid 12 as it is. And, this cassette lid 12 is
The user manually selects the middle arrows (A) and (B) in Figure 1 (b).
It is opened and closed by rotating in the ) direction, and is lightly locked in the open and closed positions and supported to prevent wobbling. 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 connected to the tape cassette 1 shown by the dotted chain line in FIG.
3 can be maintained.

Here, inside the cabinet 11 is the cassette lid 1.
There are provided a storage s14 that can accommodate the tape cassette 13 in a closed state, and a mechanism storage section 15 in which a tape recorder mechanism, etc., which will be described later, is installed. In the cabinet 1, the portion facing the tape exposed surface of the tape cassette 13 is equipped with a recording/playback head (hereinafter referred to as the recording head), an erasing head, a pair of right and left pinch rollers, etc. A head portion 16 having a diameter of 5 mm is provided. This head part 1
6 is the cassette lid 12 together with the cassette holder.
It is linked to the opening/closing operation of the

In the storage s14, as shown in FIG. 1(, ), a pair of right and left reel shafts 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. 17 and 18 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. These fast forward and rewind controls 19.20 are
Rotating shaft 171, 1 of the above right and left +7-le shafts 17, 1B
81 in the direction of its axis.

The cassette lid 12 also has a stop operator 21, a playback operator 22, and a recording knob at a position corresponding to the head s16, a tab, and a position not facing the flat surface of the stored tape cassette 13. An operator 23 and a manual reverse operator 24 are installed substantially perpendicular to the surface of the cassette lid 12 so as to be pressable. Furthermore, a window portion 25 is provided approximately at the center of the cassette lid 12. This window portion 25 is made of, for example, a transparent acrylic plate, and serves as a part of the tape see-through window of the tape cassette 13. It is set up so that it is heavy.

Here, in the cassette lid 12, between the fast forward and rewind operators 19, 20 and the stop operator 21, there is a long hole having an inclination that spreads outward from the storage section 14 side. 121 is formed. This elongated hole 12 is provided so that a channel selection operation can be performed with the cassette lid 12 closed during radio reception using a tuner back (not shown). In other words, this cassette tape recorder is not only capable of playing and recording tapes;
Radio broadcasts can be received using the tuner back. This is a tape cassette 13 in which the tuner bag, which has a tuner circuit section for receiving, tuning, detecting, and amplifying radio waves stored in a casing, is attached to a tape cassette 13.
This is done by loading it into the storage section 14 instead.

Then, when you select a desired broadcasting station by operating the tuning dial provided on the tuner, the received radio waves are detected and amplified, and then sent to the main amplifier circuit in the cassette tape recorder via the connection terminal. It is installed and played on headphones to receive radio broadcasts.

At this time, with the cassette lid 12 closed, the tuning dial of the tuner back is inserted through the elongated hole 121 and protrudes 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. Furthermore, a volume adjustment dial, a headphone shack, etc. (not shown) are provided on the side of the cabinet 11.

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 a main chassis of the tape recorder mechanism section, and the cloth and left reel shafts 17 and 18 are supported so as to be rotatable and slidable in the axial direction. Further, the main chassis 26 is provided with a pair of right and left capstans 27.28, which are the rotation axes of right and left flywheels to be described later, and the cloth and left reel shafts 17.18, and these are rotationally driven. Motors 29 and the like are supported respectively. 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.
The tape cassette 13 (Fig. 1(b)
Holds 9301 and 302 are formed so as to sandwich both ends in the width direction of (see) in the thickness direction. Further, an upper recording/reproducing head 31 and an erasing head 32 are supported approximately at the center of the cassette holder 9-30, and a pair of right and left pinch rollers 33,
34 is supported. These right and left pinch rollers 3
3.34, which will be described later, selectively moves the cloth and the left capstan 27°28 depending on the forward and reverse constant speed running of the tape
It is installed so that it can be brought into contact with and separated from it. Further, the cassette holder 30 has the above-mentioned stop.

2 playback, recording and manual reverse controls.

22, 23, and 24 are supported so that they can be suppressed.

The cassette lid 1 is attached to the cassette holder 30.
2 (see Figure 1(,)(b)) is mounted upside down, and at this time, the stop, play, record and manual reverse controls 21, 22, 23° 24 are protruded to the outside. It is used for external operations. Here, when the cassette lid 12 is opened, the cassette holder 30 is rotated in the direction of arrow (4) in FIG. Ru. At this time, the above stops.

Playback, recording and manual reverse controls 21°22.2
3 and 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 configurations of the tape recorder mechanism section and head section 16 will be explained. That is, in FIG. 4, the cassette holder 30 is located at the bottom of the main chassis 26 in the figure.
(See FIG. 2) A recording/reproducing head 31, an erasing head 32, right and left pinch rollers 33, 34, etc. are located. Of these, the recording/reproducing head 31, the erasing head 3
2 is connected to the cassette holder 3 via the helad chassis 35.
It is supported by 0. The Herad chassis 35 is supported such that a rotation shaft 351 provided at the right end in the figure is loosely fitted into the cassette holder 30 and is rotatable in the directions of arrows (C) and (D). .In addition, this rotation shaft 35
1, a substantially central portion of the right pinch lever 36 is rotatably supported. The right pinch lever 36 rotatably supports the pinch roller 33 at one end at L7 about the rotation shaft 351, and has a drive section 362 having an inclined section 361 at the other end. is formed.

Here, one end of the head chassis 35 is locked to one side of the head chassis 35, and the other end is locked to the cassette holder 30 by winding around the rotation shaft 351 (not shown). Rotation shaft 35 by torsion spring
1 and is biased to rotate in the direction of arrow (D).

The right pinch lever 36 is connected to the right pinch lever 3.
6 and the above-mentioned Herad chassis 35 to rotate in the direction of arrow C'1 about the rotation shaft 351.

Further, the helad chassis 3 of the cassette holder 30
5, a left pinch lever 37 is installed at a position substantially symmetrical to the right pinch lever 36. The left pinch lever 37 is supported at its approximate center 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 5373 having an inclined portion 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 direction of the arrow (lln, (F')) corresponding to the tape running direction.

That is, shafts 260, 261, and 262 are implanted at the lower end of the main chassis 260 in the drawing 9, and these shafts 2
60, 261, and 262 are inserted through the long holes 380°, 381, and 382 formed in the reproduction slider 38, so that the reproduction slider 38 can freely slide in the direction of arrows (1, (F'1). , this reproduction slider 38 has the cloth and left pinch levers 36 and 37 on both ends thereof.
Protrusions 3B3.31 corresponding to each drive portion 362, 373 of
34 is formed, and the first and second switching sliders 39 and 40, which can be secured to the bending engaging portions 391 and 401 respectively formed on the @1 and second switching sliders 39 and 40 described later, are formed. Engagement pieces 385 and 386 are formed. Here, the protrusions 383 and 384 formed on the playback slider 38 are connected to the tape cassette 13 to be loaded.
(see FIG. 1(b)) and the cassette holder 30.
(See Figure 3).

That is, when the playback slider 38 is slid in the direction of the arrow, the right pinch lever 36 is moved by the protrusion 383 on the right side of the figure, and the right pinch lever 36 is moved by the tilt of the drive section 362. Since the portion 361 is pressed and rotated in the direction of arrow (C) against the biasing force, 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 when 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. Then, the left pinch roller 34 is separated from the left capstan 28.

In addition, when the playback slider 38 is slid in the direction of the arrow, the left pinch roller 34 is pressed against the left capstan 28, and the right pinch roller 33 is pressed against the right capstan 27. It is separated from the

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 loaded tape cassette 13' (D) and the center of rotation of the cassette holder 30. As a result, the right and left pinch levers 36 and 37 require less operating stroke, improving operability and preventing malfunctions when inserting the tape cassette 13.

Further, as shown in FIG. 5, FIG. 6, and FIG. 7, a substantially U-shaped playback drive member 41 is installed at the left end in the drawing of the head chassis 35 supported by the cassette holder 30. A retaining portion 4 extending from one end of this regeneration drive member 41
11 is engaged with one end of the herad chassis 35.

The reproduction drive member 41 is connected to the cassette holder 3.
Arrow (G) at the end of the main chassis 3o at the bottom of 0
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 at one end of the playback operator 22 there is an operation shaft 221 projecting downward. will be extended. A through hole 222 is formed at the other end of the playback operator 22, and the through hole 222
22, a recording operation element 23 is inserted therethrough 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 and 231 is supported by the cassette holder 3°. The bearing member 42 is inserted through and supported by the bearing 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 . The top of the first drive section 223 is connected to the top of a substantially conical second drive section 225 via a shaft 224, and the bottom surface of the second drive section 225 is connected to the bottom surface of the regeneration drive member 41. is facing the department. - The bottom surface of a first driving section 232 having a substantially conical shape is attached to the operating shaft 231 of the hero recording sound operating element 23. This first drive section 232 has its top connected to the shaft 2.
33 to the top of a substantially conical second drive section 234, and the bottom surface of the second drive section 234 is connected to a substantially U-shaped recording drive disposed in parallel with one end of the playback drive member 41. It is opposed to the bottom part of the member 43. The first driving portion 232 is capable of engaging with an engaging portion 412 bent at the top of one end of the regeneration driving member 41. Also,
A driving portion 431 is formed at one end of the recording driving member 43 facing the retaining portion 412 of the reproducing driving member 4 so as to be engageable with a bending engagement portion 441 of a recording slider 44, which will be described later.

17- Here, in the above-mentioned recording slider 44, in Fig. 4,
This is omitted for the sake of illustration, and the details will be described later.

That is, suppose that the now playback operator 22 is suppressed in the stopped state shown in FIG. Then, the playback operator 22
, the bottom surface of the second drive section 225 is the reproduction drive member 41
, and rotate the regeneration drive member 41 in the direction of arrow (G).

Therefore, in the playback drive member 41, the retaining portion 411 rotates the head chassis 35 (see FIG. 4) as described above, and brings the recording/playback head 31 into contact with the tape, and also brings the recording and playback head 31 into contact with the tape. The pinch rollers 33, 34 are pressed against the right and left capstans 27, 28 via tape. The playback operator 22 is locked at the operating position, and the locking mechanism will be described later.

It is also assumed that both the playback and recording controls 22 and 23 are suppressed as shown in FIG. 6 while recording is not being performed. Then, as shown in FIG. 18-8, the bottom surface of the second drive section 234 of the recording operator 23 presses the bottom surface of the recording drive member 43, and the recording operation member 43
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/reproducing switch (not shown) to put the circuit section into a recording state, and at the same time 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 drive section 232 is connected to the engagement section 4 of the playback drive member 41.
12 and is 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 via the tape, whereupon the tape The recording is represented.

The recording described above is, for example, a one-way recording of only the tape running in the forward direction, the details of which will be described later.

Again, as shown in FIG. 4, the motor 29 is located approximately in the center of the main chassis 26 on the right side in the figure.
is installed, and a small-diameter spool 45 is fitted onto the rotating shaft 291 of the motor 29. In addition, the aforementioned right and left flywheels 46.47 are rotatably supported at the lower end of the main chassis 260 in the drawing, and these right and left flywheels 46.47 and the pulley 4 are rotatably supported.
5 is an intermediate pulley 48''Fr: A belt 49 is wound around the intermediate pulley 48''Fr so that rotational force can be transmitted.

Thus, 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
6.47 are coaxially formed with gears 50.51 having small diameters. Here, among the right and left reel shafts 17 and 18 provided approximately at the center of the main chassis 26, the left reel shaft 18, which is on the take-up side when the tape runs in the reverse direction, is as shown in FIG. It is installed in the main chassis 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.

A bearing member 53 having a substantially cylindrical shape and having a flange portion 53 with a larger diameter than the through hole 263 is inserted into the through hole 263 and has a flange portion 53 in the lower part of the figure. 531 is 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 also protrudes upward from the bearing member 53 is inserted into the through hole 54 formed at the bottom of the bottomed cylindrical lock member 54, and then inserted into the reel character 15.
5 is fitted.

Here, this reel cap 55 is attached to the rotating shaft 181.
However, the locking member 54 is independent of the rotating shaft 181. Further, a coil-shaped spring 56 is interposed between the upper end of the bearing member 53 and the locking member 54.
1 is the mouth, the reel member 54 and the reel cap 5521
- is biased upwardly through. Furthermore, a pressing portion 542 and an engaging portion 543 that are inclined in a predetermined direction are formed at the lower end portion of the locking member 54 . And among these,
The suppressing part 542 can be engaged with an engaging part 392 formed on the first switching slider 39, and the one engaging part 53 can be engaged with a four-piece slider to be described later.

Further, the rotating shaft 1 protrudes below the bearing member 53.
The diameter of the portion 81 is made slightly smaller, and a gear 57 with a smaller diameter is fitted into the smaller 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, the large-diameter gear 58 is urged upward by a coiled spring 59 interposed between it and the washer 182 attached to the lower end of the rotating shaft 181.
It is fitted with the small diameter gear 57 mentioned above. A switching drive 60 rotatably supported by the main shaft 22 and the main shaft 26 is mounted on the upper surface of the large diameter gear 58.
The driving portion 601 is engaged, and as the switching drive lever 60 rotates, the driving portion 60 presses the large-diameter gear 58 in the axial direction, thereby pushing the small-diameter gear 57. It is designed to release the fitting.

Here, as shown in FIG. 4 again, the main chassis 2
A shaft 264 is implanted in the intermediate portion between the left reel shaft 18 and the left flywheel 47 of No. 6. This axis 264
As shown in FIG. 8 again, a large-diameter gear 6 and a small-diameter gear 62 are rotatably supported. And between the large diameter gear 61 and the small diameter gear 62,
A substantially ring-shaped friction member 63 is interposed. Further, a stop 64 having a substantially cylindrical shape and having a flange 641 is fitted to the lower end of the small diameter gear 62 of the shaft 264. The small diameter gear 62 is caused by the coiled spring 65 provided above.
Since the large diameter gear 61 is pressed through the friction member 63, the large diameter gear 6 and the small diameter gear 62 are interlocked. 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. The gear 62 is connected to the left reel shaft 18.
It is possible to mesh with a gear 58 having a large diameter. and,
The large-diameter and small-diameter gears 61 and 62 are selectively meshed with the small-diameter and large-diameter gears 57.58J of the left reel shaft 18, respectively, and the tape is running at a constant speed in the opposite direction. The small-diameter gear 62 and the large-diameter gear 57 of the left reel shaft 18 mesh with each other, and the large-diameter gear 61 meshes with the large-diameter gear 57 of the left reel shaft 18 when the tape is rewinding.
The small diameter gear 58 of the left reel shaft 18 is meshed with the small diameter gear 58 of the left reel shaft 18.

On the other hand, the clothes and left reel shaft 17. Of Ill, the right reel shaft 17, which is on the take-up side when the tape runs in the forward direction, is
As shown in FIG. 9, it is installed in the main chassis 26. 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 66 with a larger diameter than the through hole 265 is inserted into the through hole 265 and has a flange portion 66 at the lower part of the figure. 661 is fixed. Then, the bearing member 6
A rotary shaft 171 of the right reel shaft 17 is rotatably inserted into the reel shaft 6 .

Further, the portion of the rotating shaft 121 that also protrudes upward beyond the bearing member 66 is inserted into the through hole 671 formed at the bottom of the bottomed cylindrical lock member 67, and then inserted into the reel cap 671.
8 is fitted. Here, this reel cap 68
is rotated integrally with the rotating shaft 171, but the locking 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 locking member 67, and the rotating shaft 17 is connected to the locking member 67 and the reel character 7″68. Further, a pressing portion 672 and an engaging portion 673 which are inclined in a predetermined direction are formed at the lower end of the locking member 67. The suppressing portion 672 can be engaged with an engaging portion 402 formed on the second switching slider 40, and the retaining portion 673 can be engaged with a lock slider to be described later.

The bearing member 66 also has a rotating shaft 1 which protrudes downward.
The diameter of the portion 7 is made slightly smaller, and a gear 70 with a smaller diameter is fitted into the smaller diameter portion. A large-diameter gear 71 is fitted into the lower end of this large-diameter gear 70, which is slidably provided in the axial direction with respect to the rotating shaft 171. Here, this gear 71 with a large diameter is connected to the rotating shaft 1.
A coiled spring 72 is interposed between the washer 172 attached to the lower end of the gear 71 and is biased upward, thereby fitting the gear 70 with the small diameter. A switching drive 2 rotatably supported by the main chassis 26 is mounted on the upper surface of the large-diameter gear 71.
6- The drive portion 731 of the lever 73 is engaged, and as the switching drive lever 73 rotates, the drive portion 73 presses the large diameter gear 71 in the axial direction, thereby causing the small diameter gear 71 to rotate. The fitting with the gear 7θ is released.

Here, the right reel shaft 17 of the main chassis 26,
Shafts 266 and 267 are implanted midway between the shaft 264 and the shaft 264. A gear 74 is rotatably supported on the shaft 266, 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.

Further, the gear 74 has a large diameter gear 7 of the right reel shaft 17 in the axial direction, which will be described in detail later when the right reel shaft 17 is suppressed and the tape is running at a constant speed in the reverse direction. Since it is slid, the meshing is released.

On the other hand, a gear 75 is rotatably supported on the shaft 267, and this gear 75 is connected to the large diameter gear 6 of the shaft 264.
It is intertwined with No. Then, the gear 75 meshes with the small diameter gear 70 of the right reel shaft 17 in a state where the right reel shaft 17 is suppressed, and the right reel shaft 17'f:
It rotates at high speed.

Further, as shown again in FIGS. 4 and 9, a rotation shaft 268 is implanted in the intermediate portion between the cloth of the main chassis 26 and the left reel shaft 17.18. This rotation axis 26
8 is the first and second switching slider 3 having an abbreviated shape.
9.40 are supported in a stacked state so that they can rotate independently of each other. The engaging portion 392 is formed at one end of the first switching slider 39 and is inclined so as to face the pressing portion 542 of the left reel shaft 18 . A protruding pressing portion 393 is formed. And this suppression part 3
Reference numeral 93 denotes a protrusion 7 formed on the other end of the switching drive lever 73 that is engaged with the large-diameter gear 71 of the right reel shaft 17.
32. Further, the first switching slider 39
At the other end, the bending engagement portion 391 is formed to correspond to the first retaining piece 385 of the reproduction slider 38, as described above.

On the other hand, a retaining part 402 is formed at one end of the second switching slider 40 and is inclined to face the pressing part 672 of the right reel shaft 17, and also protrudes to face the left reel shaft 18. A pressing portion 403 is formed. The suppressing portion 403 is engaged with a protrusion 602 formed on the other end of the switching drive lever 60 that is engaged with the large-diameter gear 58 of the left reel shaft 18 .

Further, at the other end of the second switching slider 40, the bending engagement portion 401 is formed to correspond to the second retaining piece 386 of the reproduction slider 38, as described above.

That is, the first and second switching slides 39.40
is rotated in conjunction with the above-mentioned pressure and the pressing operation of the right reel shaft 18.17 to control the tape running system 29- to a high-speed running state, and also to control the playback slider 38 in the operating state of the auto-reverse mechanism described later. It is rotated in conjunction with the slide to control the tape running system to a constant speed running state. For example, the right reel shaft 17
10 and 11, the small diameter and large diameter gears 70°71 of the right reel shaft 17 are slid in the axial direction together with the rotating shaft 171, A gear 70 is meshed with the gear 75 and is capable of high speed rotation.

At this time, the pressing portion 672 of the right reel shaft 17 presses the retaining 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 suppressing 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, and is completely released from meshing with the small diameter gear 62.

Further, as shown in FIGS. 12 and 13, when the upper 30-distributed reel shaft 18 is pressed, the left reel shaft 1
Gears 57 and 58 with a small diameter and a gear with a large diameter are slid in the axial direction together with the rotating shaft 181.
7 is meshed with the large diameter gear 61 to enable high speed rotation.

At this time, the pressing portion 542 of the left reel shaft 18 presses the retaining portion 392 of the first switching slider 39 to rotate it clockwise in the figure. Here, the switching drive lever 73 that engages with the large-diameter gear 71 of the right IJ-ru shaft 17 is pressed by the suppressing portion 393 of the first switching slider 39 and rotated. Therefore, the large diameter gear 71 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 playback slider 38 is slid most in the arrow direction (movement direction), the second switching slider 40 moves its bending engagement portion 391 to the second position of the playback slider 38. is biased by the retaining piece 386 and rotated in the counterclockwise direction in the figure.At this time, as shown in FIG. , its protrusion 602 is pressed by the suppressing portion 403 of the second switching slider 40 and rotated.Therefore, the large diameter gear 58 is rotated by the switching drive lever 6.
It is slid in the axial direction with respect to the rotary shaft 181 by the drive unit 601 of o, and the meshing with the small diameter gear 62 is released. On the other hand, the first switching slider 39 has its bent engagement portion 391 connected to the first retaining piece 385 of the reproduction slider 38.
Since the large-diameter gear 71 of the right reel shaft 17 is kept in mesh with the gear 74, the right reel shaft 17 can be rotated at a constant speed. .

In addition, as shown in FIG.
The bending engagement portion 391 of the switching slider 39 is pressed by the first retaining piece 385 of the regeneration slider 38 and rotated clockwise in the figure. At this time, as shown in FIG. 9, the switching drive lever 73 that engages with the large-diameter gear 71 of the right reel shaft 17 has its projection 732 pressed by the pressing part 393 of the first switching slider 39. Rotated. Therefore, the large-diameter gear 71 is slid in the axial direction with respect to the rotating shaft 171 by the drive section 73 of the switching drive lever 73, and the meshing with the gear 74 is released. On the other hand, the bending engagement portion 401 of the second switching slider 4o 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 The gear bed state with the small diameter gear 62 is maintained, and the left reel shaft 1
8 is in a state where it can rotate at a constant speed.

33- Also, as shown in FIG. 4 again, the main chassis 26
A rotation shaft 268 is installed approximately in the center of the rotation shaft 268, and a lock slider 76 and a switch slider 77 are each rotatably supported on this rotation shaft 268. Of these, the lock slider 76 includes the first drive section 223 of the playback operator 22, the engaging sections 673, 543 of the right and left reel shafts 17°18, the drive section (not shown) of the stop operator 2, and , first to fifth retaining portions 76 to 765 that can respectively engage with engaging portions 781 formed on the number-of-times limiting slider 78, which will be described later, are formed to spread around the rotation shaft 269. . Further, the switch slider 77 has substantially the same shape as the lock slider 76 and is provided overlapping the lock slider 76, and includes the first driving section 223 of the playback operator 22, the right and left reel shafts 17. 18 engaging portions 673, 543. The driving part of the stop operator 21 and the retaining part 7 of the number limit slider 78
First to fifth retaining portions 77, 34- to 775, which can be engaged with 81, are formed. Further, a sixth retaining portion 776 is formed at the tip of the third retaining portion 773 of the switch slider 77 and engages with a switch (not shown) for supplying electric power to the motor 29. When the switch slider 27 is rotated counterclockwise in FIG. 4, the switch is turned on by the sixth retaining portion, and the motor 29 is rotationally driven.

Furthermore, protruding locking pieces 766 and 777 are formed on the lock slider 76 and the switch slider 77. Spring 79.80 is attached to these protruding locking pieces 766.777 and predetermined positions of the main chassis 26.
4, the lock slider 76 and switch slider 77 are each urged to rotate clockwise in FIG. 4. Therefore, the first to fifth engaging parts 761 to 765 and the first to fifth engaging parts 771 to 775 of the lock slider 76 and switch slider 77
are pressed by the first driving part 223 of the playback operator 22, the engaging parts 673, 543 of the right and left reel shafts 17, 1B, the driving part of the stop operator 21, and the retaining part 781 of the number limit slider 78, respectively. It is expressed as a state.

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 are moved. ,34 selectively tape right and left cag stun 27.28
is pressed against. At this time, the lock slider 76 and the switch slider 77 are pressed against their first engaging portions 761 and 771 by the first driving portion 223 of the playback operator 22, and resist the biasing force of the suge ring 79°80. It is rotated counterclockwise in Figure 4. Then, the regeneration operation element 22 is in the suppressing operation position, and the first retaining part 76 of the lock slider 76 faces the bottom part of the first drive part 223. For this reason, the lock slider 76 is rotated clockwise in FIG. The operator 22 is locked.

At this time, the first retaining portion 771 of the switch slider 77 is maintained in a pressed state by the first driving portion 223 of the playback operator 22, so the switch is turned on and the motor 29 is turned on as described above. is rotated clockwise in FIG.

The right and left flywheels 46, 47 are then rotated counterclockwise and clockwise, respectively. At this time, when the reproduction slider 38 is slid in the direction of the arrow (G), the second switching slider 40 is moved to the fourth position as described above.
It is rotated counterclockwise in the figure. Therefore, the rotational force of the left flywheel 470 is applied to the gear 51, the large diameter gear 61, 62, the gear 74, and the large diameter gear 7 of the right reel shaft 17.
The signal is transmitted at a constant speed to the IJ-lucat f6g via the rotary shaft 171 and the rotating shaft 171, and the tape is played back in the forward direction. Further, while the playback slider 38 is slid in the direction of arrow (F), the first switching slider 37- is rotated clockwise in FIG. 4 as described above. In this case, the rotational force of the left flywheel 47 is transferred to the gear 51, the large diameter gear and the small diameter gear 61,
62, large diameter gear 58 of left reel shaft 18 and rotating shaft 18
The tape is transmitted at a constant speed to the reel carriage 55 via the tape, and the tape is played back in the reverse direction.

Next, set the fast-forward switch to the above-mentioned fast-forward switch 1.
Assume that 9 is pressed. Then, the reel cage 68 of the right reel shaft 17 is pressed, so that the locking member 67 is slid in the axial direction against the biasing force of the sliding ring 69. The locking member 67 is moved in the axial direction until its lower end comes into contact with the flange 66 of the bearing member 66. In this state, the second retaining 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 moved to the fourth position.
The lock slider 7 is rotated counterclockwise in the figure.
The second retaining portion 762 of the locking member 67 is engaged with the engaging portion 673 of the locking 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 suppressed, its rotating shaft 171 is slid in the axial direction, so that the small diameter gear 70 fitted on the rotating shaft 17 is rotated. big gear 7
It is slid in the same direction along with . 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 suppressed, the pressing portion 672 of the locking member 67 presses the retaining portion 402 of the second switching slider 4θ as described above, thereby causing the second switching slider 40
is rotated counterclockwise in FIG.

Therefore, the second switching slider 40 has its suppression portion 403 pressing the protrusion 602 of the switching drive lever 60 that engages with the large-diameter gear 58 of the left reel shaft 18, so that the switching drive lever 60 Rotate. The drive portion 601 of the switching drive lever 60 slides the large diameter gear 58 in the axial direction with respect to the rotating shaft 18, and disengages the gear C2 with the small diameter. Therefore, the rotational force of the left flywheel 47 is applied to the gear 5, the large diameter gear and the small diameter gear 61.
, 62, the gear 75, the small diameter gear 70 of the right reel shaft 17, and the rotating shaft 17, the tape is transmitted at high speed to the reel cap 68, and fast-forwarding of the tape is performed.

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 locking member 54 is slid in the axial direction against the biasing force of the spring 56. The locking member 54 continues to move in the narrow direction until its lower end abuts against the flange 531 of the bearing member 53. In this state, the third retaining part 773 of the switch slider 77 is pressed by the engaging part 543 of the locking member 54, and the cough switch slider 77 is moved to the fourth position.
The lock slider 7 is rotated counterclockwise in the figure.
The third engaging portion 763 of No. 6 is the engaging portion 54 of the locking member 54.
3. Therefore, a switch for supplying electric 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 suppressed, the rotation shaft 18 is slid in the axial direction.
The small diameter gear 57 fitted in the 8th gear is slid in the same direction together with the large diameter gear 58. For this reason, the large diameter gear 58
is separated from the small diameter gear 62, and the small diameter gear 57 is meshed with the large diameter gear 61. Further, as the left reel shaft 18 is pressed, the pressing portion 542 of the locking member 54 presses the retaining portion 392 of the first switching slider 39 as described above, thereby causing the first The switching slider 39 is rotated clockwise in FIG. Therefore, the first switching slider 39 has a pressing portion 393 that engages with the large-diameter gear 71 of the right reel shaft 17 on the switching drive lever 7.
3 to rotate the switching drive lever 41-73. The drive portion 731 of the switching drive lever 73 moves the large diameter gear 7 to the rotation shaft 17.
1 and is slid in the axial direction to disengage the gear 74. Therefore, the rotational force of the left flywheel 47 is transmitted to the reel cap 55 at high speed through the gear 51, the large and small diameter gears 61 and 62, the small diameter gear 57 of the left reel shaft 18, and the rotating shaft 18. The signal is transmitted and the tape is rewinded.

Here, a case will be described in which the stop operator 2 is operated in the above-described playback, fast-forwarding, and rewinding states. That is, as described above, the stop operator 21 is installed in the cassette holder 30 so as to be pressable, and the lower end of the stop operator 21 is provided with the stop operator 21 that can be engaged with the fourth engaging portion 764 of the lock slider 76. A driving section is formed.

In the playback, fast forwarding and rewinding states, each of the operators 22, 19, 20 is operated by the first to third engaging portions 761 to 763 of the lock slider 76 at the respective operating positions. - 223, locking part 67.54 engaging part 673° 543
is locked. Therefore, when the stop operation element 21 is depressed, the lock slider 76 has its fourth retaining part 764 pressed by the driving part of the stop operation element 21, and is rotated counterclockwise in FIG. Therefore, the playback, fast forward, and rewind operators 22, 19, 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 diameter gears 70, 71 and 57. of the right and left reel shafts 17, 18.
58 is configured to slide approximately perpendicularly to the main chassis 26. Therefore, since each gear of the tape running drive system is supported in a position approximately parallel to the main chassis 26, the meshing relationship of each gear is stable, the transmission of rotational force is efficient, and the number of parts is reduced. This can promote downsizing.

By using the first and second switching sliders 39 and 40, which change the running system into fast-forwarding and rewinding states, the running yarn is switched in the regenerating state, the number of parts is small, and the system is compact. It is possible to promote the development of

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, as shown in FIGS. 4 and 17(a) and (b), a friction lever 8 is provided on the lower end surface of the gear 62 with a small diameter.
1 is provided 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 provided at the other end of the friction lever 81.
is formed, and a bottle 821 protruding from the tip of one end of an abbreviated detection sensor 82 is loosely fitted into the elongated hole 81. The detection lever 82 is rotatably supported by a shaft 822 protruding from the main chassis 26 at a substantially central portion thereof, and the inside portion of the base at one end thereof is formed into the large-diameter gear 61. The cam portion 61 is brought into contact with the side portion of the cam portion 61. Further, a protrusion 823 is formed at the base of one end of the detection lever 82, and this protrusion 823 is engaged with the curved operating wall 612 formed on the flat surface of the large diameter gear 61. It is considered possible. Further, first and second engaging portions 824 and 825 are formed at the other end of the detection lever 82 . Of these, the first retaining portion 824 is capable of engaging with a bending engaging portion 782 formed on the number-of-times limiting slider 78, which will be described later.
The retaining portion 825 is capable of engaging with a bent engagement portion 831 formed on a reverse drive lever 83, which will be described later.

That is, in the above-described tape playback state, the left flywheel 47 and the gear 51 are rotated clockwise in FIG.
is rotated counterclockwise in the figure. Therefore, the friction lever 81 is urged in the same direction by the rotational force of the small diameter gear 61, and the detection lever 82 is also urged in the same direction about the shaft 822. At this time, the detecting lever 82 swings about the shaft 822 as the inner side of its base comes into sliding contact with the cam portion 611, thereby maintaining a stable tape running state at a constant speed. For example, when the tape reaches the end while the tape is running at a constant speed in the forward direction, the rotation of the right reel shaft 17 is stopped.
And the rotation of the small diameter gear 62 is stopped. Therefore, a slippage occurs between the small diameter gear 62 and the large diameter gear 61. At this time, the rotation of the small diameter gear 62 is stopped, so that no biasing force is applied to the friction lever 81 and the detection sensor z4-32. On the other hand, as the large-diameter gear 6 continues to rotate, the cam portion 611 is also rotated. Therefore, as the cam portion 611 rotates, the detection lever 82 is rotated clockwise in FIG. 4 about the shaft 822 by the length of the maximum diameter of the cam portion 611.
It will be stopped at that position.

Then, as the large-diameter gear 610 rotates, the detection lever 82 is further pushed as its protrusion 823 comes into contact with the operating wall 612 of the large-diameter gear 61, so that the detection lever 82 is further pressed. It is rotated clockwise. At this time, the first and second engaging portions 824 and 825 of the detection lever 82 actuate the number of times limiting slider 78 and reverse drive lever 83, which will be described in detail later.

Furthermore, 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.

The explanation will be omitted.

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. The rotational force of the motor 29 is transmitted to the gear 5θ together with the right flywheel 46 via a belt 49.
7 in the counterclockwise direction in the figure. A shaft 84 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 this shaft 841 so as to be able to mesh with the gear 50. ing. As shown in FIG.
is formed. Still, on one side of the gear 84,
A substantially disc-shaped guide portion 844 is provided protrudingly, and this guide portion 844
Approximately V-shaped locking grooves 845 and 846 facing each other are formed in correspondence with the notches 842 and 843.

Furthermore, the locking groove 845 is provided on one side of the gear 84.
, 846 protruding in a substantially triangular shape.
, 848 are formed. A cam portion 85 is formed on the upper surface of the guide portion 844, with a portion having a flat portion 85 and the other portion being curved in the shape shown in the figure.
is inserted into a substantially rectangular play piece L386 formed in the middle part of the reproduction slider 38. The play piece L386 is formed with inclined bending pressing parts 387° and 388 facing both sides in the figure so as to be able to engage with the maximum diameter part of the cam part 85.

Here, an idle bin 832 formed at one end of the reverse drive lever 83 is brought into contact with the guide portion 844 . The intermediate portion of the reverse drive lever 83 is rotatably supported by the main chassis 26, and is biased clockwise in the figure by a stripe ring (not shown). Further, the reverse drive lever 83 has the bent engagement portion 825 that can be engaged with the second engagement portion 825 of the detection lever 82 at the other end. The reverse drive lever 83 is engaged with the manual reverse operator 24 at its other end, and rotates counterclockwise in the figure in response to the operation of the manual reverse operator 24. It is made to be done.

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 retaining portion 825 of the detection lever 82 presses the bending engagement portion 83 of the reverse drive lever 83, and the reverse drive lever 83 is moved to the position shown in FIG. Rotate counterclockwise in the figure as shown.

At this time, the guide pin 832 of the reverse drive lever 83 presses one side of the projection 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. 18(b). For this reason, the reverse drive lever 83 is
), the guide pin 832 is guided by the other protrusion 848 while slidingly contacting the guide portion 844, and is locked in the other locking groove 846 as shown in FIG. 18(d)K.

At this time, the cam portion 85 of the gear 84 is rotated in the same direction as the gear 84 rotates, and presses the bending engagement portion 387 or 388 of the regeneration slider 38 to move the regeneration slider 38 along the arrow. (Move in the direction of Takumi or (Oi).

For this reason, the reproduction slider 38 operates the first switch slider 50- or the 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 its cutout 8
One of the wheels 45,846 is the right flywheel 27.
When the gear 50 is opposed to the gear 50, its rotation is stopped.

Further, the reverse drive lever 83 is not operated only by the detection lever 82 described above, but is operated as shown in FIG.
a) l As shown in (b), the tape is rotated counterclockwise in the figure in conjunction with the operation of the manual reverse operator 24, and the tape running direction is switched in substantially the same manner as described above. It is.

Here, the manual reverse operator 24 is, for example, the first
Even if the suppression operation is continued as shown in FIG. 9(b), the guide pin 832 of the reverse drive lever 83 is locked to the other protrusion 848 of the gear 84 after the tape running direction has been switched once, and then This eliminates the need for continuous switching operations, which prevents erroneous operations 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 half a rotation by the gear 50 of the right flywheel 27. Therefore, there is no need to provide a starting member such as a spring to start the gear 84, so the number of parts is reduced and the configuration is simplified.

Further, since no biasing force is applied to the gear 84, the load on the rotary motor 29, which rotates efficiently, can be reduced, and power consumption can be reduced.

In addition, as shown in FIG. 20 (,), the main chassis 2
6 is provided with a muting switch 86 corresponding to the reverse drive gear 84 for performing muting when switching the tape running direction. That is, this muting switch 86 is installed corresponding to one side of the gear 84, and is electrically connected to the circuit section shown in the figure. The muting switch 86 has a movable contact 861 connected to the projections 847 and 84.
8, the guide bin 8 of the reverse drive lever 83
32 is provided corresponding to one side located on the opposite side. Therefore, when the gear 84 starts rotating as described above, the muting switch 86 is activated as shown in FIG.
As shown in b), the movable contact 86 is connected to the protrusion 8, for example.
48 is pressed for several seconds to turn it on, and muting is performed in a circuit. Here, the upper base muting switch 86 is turned off as shown in FIG. 19 (,) when the switching of the mechanism section is completed as the gear 84 rotates thereafter.

In this way, by configuring the muting switch 86 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 muting 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, the main chassis 2
6, a shaft 783 is implanted in the lower left part of the figure. As shown in FIG. 21(,), this shaft 783 rotatably supports an intermediate portion of the number-limiting slider 78, and one end of the slider 783 protrudes from the side of the cassette holder 30 to set the number of times. The limit switch 87 is shown in FIG. 4.

Further, at the other end of the number-of-times limiting slider 78, there is provided a drive section 784 whose substantially central portion is rotatably supported. This drive portion 784 has the bending engagement portion 7 at one end.
82 is formed to be able to engage with the first engaging part 824 of the detection lever 82, and the retaining part 781 is formed at the other end to be able to engage with the fifth engaging part 7 of the lock slider 76.
65 so that it can be engaged with it. moreover,
The number 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 set by the arrow (1) (F
) can be slid freely in the direction. 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. 78
2 and the engaging portion 78 are the first locking portion 824 of the detection lever 82 and the fifth locking portion 765 of the lock slider 76.
The situation is such that they do not face each other. Further, as shown in FIG. 22(,), 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 the bending engagement portion 782 and the engaging portion 781 faces the first retaining portion 824 of the detection lever 82 and the fifth retaining portion 765 of the lock slider 76,
The state is set to be compatible.

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 the arrow ①, the bending engagement portion 782 of the number of times limit slider 78 engages the first locking position of the detection lever 82, as shown in FIG. 21(b). By slightly engaging and pressing the portion 824, the drive portion 784 is rotated slightly.

However, the number of times limit slider 78 is limited to its engaging portion 781.
is not opposed to the fifth retaining portion 765 of the lock slide/76, so that the lock slider 26 is not opposed to the regeneration operator 22.
The first drive unit 223 is not rotated in the direction of unlocking. At this time, the detection lever 82
As described above, the second retaining portion 825 presses the bending engagement portion 83 of the reverse drive lever 83 to switch the tape running direction.

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

Further, when the number of times limit switch 78 is slid in the direction of arrow (E), the bending engagement portion 782 of the number of times limit slider 78 is connected to the detection lever 82 as shown in FIG. 22 (&).
is opposed to the second retaining portion 824 of. Therefore, as the detection lever 82 rotates clockwise in the drawing, the bending engagement portion 782 of the number-limiting slider 78 is pressed as shown in FIG. is rotated counterclockwise in the figure. Here, the engaging portion 781 of the driving portion 784 presses the fifth retaining portion 765 of the lock slider 76, and in order to rotate the lock slider 76 counterclockwise in the figure, the first driving portion of the regeneration operator 22 is activated. The lock of the portion 223 is released to bring it into a stopped state. At this time, the second retaining portion 825 of the detection lever 82 rotates the reverse drive lever 83 counterclockwise in the figure in the same manner as described above, so that the tape running direction is switched as described above. It is something.

57- In this way, by providing the tape end detection mechanism in the large and small diameter gears 61 and 62 that selectively drive the right and left reel shafts 17 and 18 to rotate in accordance with the tape running direction, the end of the tape can be detected. Detection becomes reliable, and the number of parts is reduced, which facilitates miniaturization.

In the reproduction state, the tape running system is configured to be reversed when automatically stopped by the number limit slider 78. Therefore, when the playback operator 22 is operated again, playback is performed from the state where the mechanism section is inverted.
This eliminates the trouble of replacing tape cassettes, and the operability is simplified.

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 connected to a shaft 442 implanted in the main chassis 26 and a shaft 841 on which a gear 84 for driving the reverse drive 58 is supported by an arrow (C).

■) It is supported so that it can slide freely in the direction. Further, at the bottom of the shaft 442 of the recording slider 44, there is an arrow (b).
A locking portion 443 is formed that is inclined in the direction, and the locking portion 443 of the number-of-times limiting slider 78 is connected to the locking portion 443 .
85 is engaged.

Further, a rotation shaft 445 is attached to the lower part of the shaft 841 of the recording slider 44.
One end of the recording control member 88 is rotatably supported by the recording control member 88 . 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. In addition, 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 and holding 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 corresponding to the cam part 85 of the gear 84, and is interlocked with the recording slider 44 to control the recording when the tape running system is running in the reverse direction. It is engaged with the restraining and retaining portion 882 of the member 8.8.

By the way, the playback and recording operator 22
．． 23, the recording slider 44 is slid in the direction of arrow (C) in conjunction with the recording operator 23 as described above, and the circuit section is put into the recording state, and the erasing head 32 is brought into contact with the tape. . On the other hand, the playback operator 22
In conjunction with this, the recording/reproducing head 31 is brought into contact with the tape, and the right pinch roller 33 is necessarily brought into pressure contact with 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, when both the playback and recording controls 22 and 23 are operated to perform recording as shown in FIG. is 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 engages with the protrusion 849 of the gear 84.
By being engaged with the recording slider 44, the protruding portion 881 is in a state of being fused from the notch engaging portion 446 of the recording slider 44.

In this case, the gear 84 is rotated slightly clockwise in the drawing because its projection 849 is pressed by the pressing engagement part 882 of the recording control member 88 due to the biasing force of the spring 89. Therefore, this gear 84 is
), as shown in (d), it is meshed with the gear 5° of the right capstan 27 and rotated half a rotation, making the traveling system run in the forward direction as described above.

On the other hand, when the recording slider 44 slides in the direction of the arrow (C) mentioned above, its retaining portion 443 presses the retaining portion 75 of the number limit slider 78 to rotate it counterclockwise in the figure. Therefore, as described above, the number of times limiting slider 78 has its bending engaging portion 782 and engaging portion 781 connected to the first retaining portion 824 of the detection lever 82 and the locking slider 6.
1- is opposed to the fiftieth engaging portion 765 of the holder 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 has its pressing engagement portion 882 pressed against the protrusion of the gear 84. Since it is not opposed to the portion 849, it is not engaged as described above. In this case, the recording control member 88 has its protrusion 881 engaged with the notch engaging portion 446 of the recording slider 44, and in the next state, the recording slider 44
and slide in the direction of arrow (C). Here, the gear 84 is maintained in a stable state without being subjected to the biasing force of the spring 89, and recording is performed here.

In this way, playback and recording operator 2
When 2.23 is operated together, for example, when the tape running system is running in the reverse direction (=62-), the reverse drive gear 84 is operated reliably, switching to the forward running state, and one-way recording is performed. Ru. For this reason,
Misrecording can be reliably prevented and usability can be improved.

〔Effect of the invention〕

As mentioned above, according to the present invention, it is possible to provide a very good cassette tape recorder device that has a simple structure, can be downsized, and has good operability.

[Brief explanation of drawings]

FIG. 1(,) is a plan view showing a cassette tape recorder device according to an embodiment of the present invention, and FIG.
, ) side view, Figure 2 is a perspective view showing the external appearance of the mechanism part, head part, and cassette holder in Figure 1 (, ), and Figure 3 is a side view of the mechanism part, head part, and cassette holder in Figure 1 (, ).
Fig. 4 is a plan view showing the structure of the mechanism shown in Fig. 1 (,), and Fig. 5 shows the mounting structure of the playback and recording controls. 6 is a perspective view showing the operating state of FIG. 5; FIG. 7 is a sectional view showing a part of FIG. 5; FIG. 8 is a sectional view showing a part of FIG. 6; The figure is a sectional view showing the mechanism section in Figure 1 (,) when running at a constant speed in the reverse direction, and Figures 10 and 11 are respectively
12 and 13 are a sectional view and a plan view showing the mechanism part in FIG. 1(a) in a rewinding state, respectively; 1st
4 and 15 are a plan view and a cross-sectional view, respectively, showing the mechanism section in FIG. 1(,) running at a constant speed in the forward direction, and FIG. 16 is a constant speed in the reverse direction of the mechanism section in FIG. 1(a). The plan view showing the running state, Figures 17(a) and (b), are respectively similar to Figure 1(,
) Plan view and cross-sectional view showing the tape end detection mechanism of
Figures 8 (,) to (d) are plan views showing the operation of the drive system of the reverse mechanism in Figure 1 (,), and Figure 19 (a), respectively.
, (b) are operation explanatory diagrams showing the relationship between the manual reverse operator and the reverse drive lever shown in FIG. 1(a), and FIGS. 20(a), (b), and (c) are respectively shown in FIG. , ) is a plan view showing the mixing operation of the second
Figures 1 (,) and (b) are respectively plan views showing the operation of the mechanism in Figure 1 (,) in the reverse state, and Figures 22 (a) and (b) are respectively the mechanism in Figure 1 (a). FIG. 23 is a plan view showing the operation of the automatic stop state of the
24(a) to 24(d) are plan views showing the operation of FIG. 23, respectively. 1. Cabinet, 12. Cassette lid, 13.
...Tape cassette, 14...Storage section, 15...
Mechanism storage unit, 16...Head part, 17...Right reel shaft, 18...Left reel shaft, 19...Fast feed operator, 2
0... Rewind operator, 21... Stop operator, 22...
...Playback control, 23...Recording control, 24...Manual reverse control, 25...Window section, 26...Main chassis, 27...Right capstan, 28...
Left capstan, 29...Motor, 30...Cassette holder, 31...Recording/reproduction head, 32...Erasing head, 33...Right pinch roller, 34...Left pinch roller, 35... ... Head sheath, 36... Right pinch lever, 362... Drive section, 37... Left pinch lever, 373... Drive section, 38... Playback slider, 39
...first switching slider, 4o...second switching slider, 4no...regeneration drive member, 42...bearing member,
43...65- 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, 6o... 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, 8θ... Spring, 81... Friction lever, 82... Detection lever, 83... Reverse drive lever, 84... Gear, 8
5...Cam part, 86...Meeting switch,
87...Number of times limit switch, 88...Recording control member, 89...Spring 66-ring. =67- Fig. 1 (a) ≦(-1 Fig. 17 (a) (b) (b) 43 Fig. 24 (b) (C) 8 Otsu Fig. 24

Claims (1)

[Claims] A first rotating body that rotates independently of tape running, and a second rotating body for reverse drive that is engaged with the first rotating body so as to be able to transmit rotational force, with a portion of the rotating body being non-coherent. a control member that is driven in conjunction with the operation of the recording operation member; and a control member that is formed at a predetermined position of the second rotating body and selectively receives the operating force of the control member to operate the second rotating body. an engaging part that rotates in a direction to engage the first rotating body; a cam part formed on the second rotating body that switches tape running between forward and reverse directions; and a reverse operation in conjunction with a recording operator. One way 1
A cassette tape recorder device comprising: a number-of-times limiting member for limiting the number of times to a number of times.