JPS60163259A - Tape recorder device - Google Patents

Abstract

PURPOSE:To reduce the operating force of a tape constant speed travelling operator by rotating a switching member around the contact part of the 1st and 3rd engaging parts and the contact parts of the 2nd and 4th engaging parts in different directions each other when a working member is located on the the 1st and 2nd positions. CONSTITUTION:A gear 23a is fitted to a reel shaft 23 coaxially and engaged with a gear 23a freely rotatably supported by a shaft 23b. When a tape travelling direction switching lever 35 is rotated in the shown clockwise direction, the gear 23c is engaged with a gear 35h. On the other hand, a gear 24a is coaxially fitted also to a reel shaft 24 and engaged with a gear 24c freely rotatably supported by a shaft 24b planted into a main chassis 22. When the lever 35 is rotated counterclockwise, the gear 24c is engaged with a gear 35i.

Description

[Detailed Description of the Invention] The present invention relates to a tape recorder device that is oriented toward miniaturization.
In particular, the present invention relates to improvements in control means for bimboo rollers in devices equipped with an auto-reverse mechanism.

[Technical background of the invention and its problems]

Recently, cassette tape recorders are small and lightweight, making them suitable for portability, and in particular, two-way stereo type devices using radphones have become popular, allowing users to enjoy tape playback while wearing headphones, for example, while walking. It is made possible to do so. Currently, cassette 7' recorders of this type that are smaller than compact tape cassettes have already been developed. In other words, this means that the compact tape cassette can be inserted into the compact tape cassette from the part where the head insertion hole and pinch roller insertion hole are formed.
It is supported and mounted over the area where the reel hub is installed, leaving the circumferential side of the tape cassette exposed, and when the tape cassette is not installed, it is extremely small and easier to handle. be.

By the way, when a cassette tape recorder is made smaller than a compact tape cassette as described above, the next requirement is to have features that conventional large cassette tape recorders have, such as an auto-reverse function, a manual reverse function, and an automatic stop function. The aim is to make it possible to realize the various functions that are provided. However, it is of course impossible to apply the various mechanisms used in conventional large cassette tape recorders to cassette tape recorders smaller than compact tape cassettes, and there are There is a need for the development of a new mechanism suitable for recorders, that is, a new mechanism that can realize the various functions described above without hindering the miniaturization of cassette tape recorders.

On the other hand, simply reducing the size of the various parts constituting the mechanism in order to achieve the above requirements will not only make assembly work difficult but also cause malfunctions.

Therefore, there has been a strong demand for the development of an m-structure that can realize the various functions described above without hindering miniaturization, is easy to assemble, and is less prone to malfunctions.

[Purpose of the invention]

This invention was made based on the above-mentioned circumstances, and when the inch roller is brought into contact with and separated from the capstan when switching between forward and reverse tape constant speed running directions, the operating force of the tape constant speed running operator and the load applied to the motor are reduced. It is an object of the present invention to provide an extremely good tape recorder device that is lightweight and suitable for downsizing.

[Summary of the invention]

That is, the tape recorder device according to the present invention is
and a second capstan, first and second pinch rollers provided corresponding to the first and second capstans, and rotatably supports the first and second pinch rollers, respectively. and the first and second pinch rollers are connected to the first and second support means, and the first and second pinch rollers are connected to the first and second support means. 2, a movable member that is moved to a predetermined position in conjunction with the operation of the tape constant speed running operation member, and a substantially central portion of the movable member that rotates. a switching part that is movably supported and has first and second engaging parts formed on both sides of the pivot point, and both ends of which are respectively engaged with the first and second supporting means; and a tape. Continuous with the detection operation of the end detection mechanism or the operation of the manual reverse operation member! + is moved to the first and second positions where the tape is running in the forward and reverse directions, and in the first and second positions, the first and second switches of the switching unit an actuating part side formed with third and fourth engaging parts that are respectively engaged with the engaging part, and when the actuating part is in the first and second positions, the switching part 1, the first
By rotating the contact portion between the engaging portion and the third engaging portion and the contact portion between the second engaging portion and the fourth engaging portion as fulcrums in mutually different directions. The present invention is characterized in that the first and second pinch rollers are brought into selective contact with the first and second capstans.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the first example of application of this invention. This figure shows the appearance of a small cassette tape recorder. That is, 11 in the figure is a cabinet formed in a substantially box shape, and a compact tape cassette (indicated by a two-dot chain line in the figure) 1
It is formed smaller than 2. This cabinet 11
A cassette lid 13 is supported on the upper surface in the figure. That is, the cassette lid 13 has a substantially square-shaped side surface, and one end 13a thereof is supported by the cabinet 11 so as to be rotatable in the directions of arrows (5) and (B) in the figure. There is. The cassette lid 13 is manually rotated by the user, and is lightly locked in the open position rotated in the direction of the arrow (5) in the figure, and rotated in the direction of the arrow (off the coast of the figure). It is ensured that it is locked in the closed position by a locking mechanism, which will be described later.

The cassette lid 13 is inserted between the cabinet 1) and the cassette lid 13, as shown in FIG. 1, with the cassette lid 13 closed.

In this case, the compact tape cassette 12 is configured such that the portion where the well-known head insertion hole and pinch roller insertion hole, which cannot be seen in the drawing, are formed is directed toward the rotation fulcrum of the cassette lid 130, and a pair of reel hubs are provided. The cassette cover 12 is mounted in such a way that it is sandwiched between the cabinet 1 and the cassette lid 13, and the other parts, that is, the back surface 12a and both side surfaces 1; 2b and 12C are exposed.

The cassette lid 13 also has a stop operator 1-4, a playback operator 15, a recording operator 16, a manual reverse operator 17, and a display section 18 indicating the tape running direction, at a portion corresponding to the rotational fulcrum. etc. are arranged. moreover,
A window portion 19 made of, for example, a transparent acrylic plate is provided at a substantially central portion of the cassette lid 13, corresponding to the tape see-through window formed in the attached compact tape cassette 2. The remaining amount of tape, etc. can be visually checked with the cassette lid 13 closed.

Here, the cassette lid 13 is provided with a substantially triangular high-speed tape running operator 20 near the window 19. Although the details will be described later, this tape high-speed running operator is arranged to face the tip of one of a pair of reel shafts (not shown) that protrude from the approximate center of the cabinet 11 in the direction of the cassette lid 13. ing. Then, by suppressing the tape high-speed running operator 20,
One of the reel shafts is pressed in the direction of its axis, and a tape recorder mechanism provided in the cabinet 11, which will be described later, is placed in a tape running state at high speed. however,
In this case, run the tape in the forward direction at high speed (fast forward).
The manual reverse operation element 17 is used to select whether to run the tape in the opposite direction at high speed (rewinding) or in the opposite direction at high speed (rewinding).

Further, the other end of the pair of reel shafts is provided for locking the cassette lid 13 in a closed state.

An ejector 2 is provided on the side of the cassette lid 13 for unlocking the cassette lid 13 in the closed position.
No. is provided.

Here, the above-mentioned cassette tape recorder is not only capable of recording and playing back tapes, but also can receive radio broadcasts by using a tuner pack. That is, this tuner pack houses a tuner circuit section for receiving, tuning, detecting, and amplifying radio waves in a casing that can be inserted between the cabinet 11 and the cassette lid 13. This is a device that is installed between the cabinet 11 and the cassette lid 13 in place of the compact tape cassette 12 described above.

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 connected to the connection terminal provided on the tuner back and the cabinet 11. The signal is introduced into the main amplifier circuit in the cabinet 11 through the connecting terminal connected thereto, and is reproduced through headphones, where the radio broadcast is received.

The back and side parts of the cabinet 11 that cannot be seen in Figure 1 have a headphone jack into which a headphone plug is inserted, a tape-radio selector switch, a volume adjustment dial, a stereo balance adjustment dial, and a tape type. (For example, normal tape and chrome tape, etc.)
A changeover switch and a reverse function selection switch for selecting whether or not to perform the auto reverse function, etc.
are arranged respectively.

FIG. 2 shows the tape recorder mechanism section of the cassette tape recorder shown in FIG. 1. That is, 22 in FIG. 2 is a main chassis of the tape recorder mechanism section, which is housed in the cabinet 11. The pair of reel shafts 23 and 24 are rotatably supported at approximately the center of the main chassis 22. Of these, the reel shaft 23 is supported so as to be slidable also in its axial direction, and is adapted to run the tape at high speed as described above. The other reel shaft 24 is used to lock the cassette lid 13 described above.

Here, on the lower surface side of the main chassis 22 that cannot be seen in FIG. 2, the reel shaft 23.
4 as the playback, recording and high-speed tape running operation 15,
16. A tape drive mechanism for rotating the tape at a predetermined rotational speed and rotational direction in response to the operation in 20, a tape running stop detection mechanism that detects the stop of tape running and detects that the tape has reached the end, and this tape. A running stop detection mechanism, a forward/reverse switching mechanism for switching the running direction of the tape in conjunction with the manual reverse operator 17, and a motor 25 serving as a power source for each of these mechanisms are installed, respectively.

Further, on the upper surface side of the main chassis 22 in FIG.
A pair of capstans 2 that are part of the tape drive mechanism mentioned above
6.27 is rotatably supported. The -pair of capstans 26 and 27 serve as rotation axes of a pair of flywheels, which will be described later, provided on the lower surface of the main chassis 22 in FIG. 2, respectively.

A cassette holder 28 is rotatably supported at one end of the main shear 22 in the direction of arrow C in FIG. 2, and the cassette lid 13 is attached to this cassette holder 28. . This cassette holder 2
8 has the compact tape cassette 1 on both ends thereof.
Hold parts zsa and tab are formed so as to sandwich both widthwise ends of the cassette holder 28 in the thickness direction.Also, approximately in the center of the cassette holder 28, there is a recording/playback head (hereinafter referred to as a recording/playback head) 28C and an eraser head. Head zsd is supported. Of these, the recording/reproducing head 28C is attached to a head chassis 28e that is supported by the cassette holder 28 so as to be slidable in the direction of arrow C in FIG. This head chassis 28e is moved forward in the direction of arrow C in FIG. 2 in conjunction with the operation of the playback operator 15 with the cassette holder 28 in the closed position. 28C is advanced and brought into contact with the tape. The erasing head 28d is moved forward in the direction of arrow C in FIG. 2 in conjunction with the operation of the recording operator 16 and comes into contact with the tape when the cassette holder 28 is in the closed position.

Therefore, when recording is performed by operating both the recording operator 16 and the reproducing operator 15, both the recording/reproducing head 28G and the erasing head 28d are brought into contact with the tape.

Pinch rollers 29 and 30 are rotatably supported on the cassette holder 28 at positions corresponding to the capstans 26 and 27, respectively. These pinch rollers 29, 30 will be described in detail later, but in conjunction with the switching operation of the forward/reverse switching mechanism, the pinch rollers 29, 30 selectively move the capstan 26° 2.
7. Furthermore, the cassette holder 28 has the stop and play functions.

Each of the recording and manual reverse operators 14 to 17 is supported so as to be freely suppressable. When the cassette lid 13 is attached to the cassette holder 28, each of the operations 14 to 17 is projected to the outside and becomes operable. Further, the playback and recording controls 15 and 16 are both locked at their operating positions, and are unlocked by operating the stop control 14. moreover,
The stop operator 14 and the manual reverse operator 17 are
It is not locked in the operating position and always returns to its original position. Further, the tape high-speed running operator 20, that is, the reel shaft 2.9, is also locked at the operating position, and the locked state is released by operating the stop operator 14.

Here, when the cassette holder 28 is rotated in the direction of the arrow in FIG. 28d, head chassis 2
8e, pinch rollers 29 and 30 are connected to the cassette holder 28
It will be moved along with the

FIG. 3 shows a tape drive mechanism for rotating the pair of reel shafts 23, 24, respectively. That is, as described above, the capstans 26 and 27 serve as the rotation shafts of the flywheels 31 and 32, respectively. A belt 33 is connected to a small diameter pulley 25 b1 fitted to the rotating shaft 25 a of the motor 25 , a flywheel 31 32 and a shaft 34 a implanted in the main chassis 22 . The rotational force of the motor 25 is transmitted by attaching a rotatably supported small-diameter pulley 34 as shown in the figure. Here, the motor 25 is driven to rotate its rotating shaft 25a clockwise in FIG. 3 in conjunction with the operations of the playback operator 15 and the tape high-speed running operator 20. . For this purpose, the flywheels 31 and 32 are rotated counterclockwise and clockwise in FIG. 3, respectively. Note that during recording, since both the playback operator 15 and the recording operator 16 are operated, the remoter 25 rotates and the flywheel 31
．． 32 is also rotationally driven.

Further, when the regeneration operator 15 is operated, the motor 26 is operated by a governor circuit (not shown), and the rotary shaft 25 of the motor 26 is
When the rotating shaft 25B is controlled to rotate at a low speed and the tape crystal running operation operator 20 is operated, the governor circuit is disconnected and the rotating shaft 25B is controlled to rotate at a high speed, as will be described later. ing.

Here, a small-diameter gear 26E1 is coaxially fitted into the capstan 26. This gear 26B is rotated integrally with the flywheel 3 and the capstan 26. A large-diameter gear 35b rotatably supported by a shaft 35B implanted in the main shear 22 is meshed with the gear 26F1. Further, a gear 35C having a smaller diameter than the gear 35b is rotatably supported on the shaft S6a. And these two gears 3
5b and 35G are frictionally engaged with each other and rotate integrally until a predetermined load or more is applied.

Further, a substantially central portion of the tape running direction switching lever 35 is rotatably supported on the shaft 35a. however,
The rotation of the tape running direction switching lever 35 and the rotation of the gears 35b and 36C are completely independent. Furthermore, a bent engagement piece 35d is formed at one end of the tape running direction switching lever 35. When this bent engagement piece 35d is engaged with a reverse slider of a forward/reverse switching mechanism to be described later, the tape running direction switching lever 35 is rotated clockwise and counterclockwise in FIG. It is something that becomes. That is,
Although the details will be described later, the tape running direction switching lever 35 is
When the forward/reverse switching mechanism al is brought into a state corresponding to forward running of the tape, it is rotated clockwise in FIG.
It is designed to be rotated counterclockwise in the figure.

Two shafts 35e and 35f are implanted at the other end of the tape running direction switching lever 35, respectively. Two gears 35g and 35h are rotatably supported on the shaft 35e. These two gears ssg,
ssh is rotated integrally, one gear 35
g is meshed with the gear 35C. In addition, the above axis s
A gear ssi is rotatably supported by sf. This gear 35 is meshed with the gear 35h. Therefore, the gears 2611 and 35b, the gears 35C and 35
The meshing states of the g1 gears ssh and ssi are always maintained regardless of the rotational position of the tape running direction switching lever 35.

Here, a gear 2311 is coaxially attached to the reel shaft 23.
is provided. This gear 23a is rotated integrally with the reel shaft 23, and is meshed with a gear 23C rotatably supported by a shaft 23b implanted in the main chassis 22.

When the tape running direction switching lever 35 is rotated clockwise in FIG.
It is meshed with 5h.

On the other hand, a gear 24a is also coaxially provided on the reel shaft 24. This gear 24B rotates integrally with the reel shaft 24, and is meshed with a gear 24C rotatably supported by a shaft 24b implanted in the main chassis 22.

The gear 24C meshes with the gear ssi when the tape running direction switching lever 35 is rotated counterclockwise in FIG.

Therefore, when the forward/reverse switching mechanism is in a state corresponding to the forward running of the tape, that is, in a state where the gears 35h and 23C are meshed, the rotational force of the motor 25 is applied to the pulley 25b1, the belt 33, and the flywheel 3. No, gear 26a
, J5b.

The signal is transmitted to the reel shaft 23 via ssc, ssg, ssh, zsc and 23a, and the reel shaft 23 is rotated counterclockwise in FIG. 3, causing the tape to run in the forward direction. At this time, if the playback operator 15 is fully operated, the rotary shaft 25a of the motor 25 is rotated at a low speed by the action of the governor circuit described above, so the reel shaft 23 is rotated at a low speed, and the pinch roller is rotated as described later. 29 is pressed against the capstan 26 via the tape, and the tape is brought into a constant speed running state in the forward direction. Furthermore, if the tape high-speed running operator 20 is operated, the governor circuit is disconnected, the rotating shaft 25B of the motor 25 is rotated at high speed, and the reel shaft 23 is also rotated at high speed, so that the tape is running at high speed in the forward direction. It is done.

Further, when the forward/reverse switching mechanism is in a state corresponding to running the tape in the reverse direction, that is, in a state where the gear ssi and the gear 24G are in mesh with each other, the rotational force of the motor 25 is applied to the pulley 2.
5b, belt 33, - flywheel 31, gear 2ea
, ssb.

The signal is transmitted to the reel shaft 24 via sec, ssg, ssb, ssr, 24c and 24a, and the reel shaft 24 is rotated clockwise in FIG. 3, causing the tape to run in the reverse direction.

At this time, if the playback operator 16 is being operated, the reel shaft 24 is rotated at a low speed, and the pinch roller 30 is pressed against the capstan 27 via the tape, causing the tape to run at a constant speed in the reverse direction. . Further, if the tape high-speed running operation element 20 is operated, the reel shaft 24 is rotated at high speed, and the tape is brought into a high-speed running state in the reverse direction.

Therefore, when the constant speed tape running operation operator is operated during playback, recording, etc., by switching the forward/reverse switching mechanism using the above-mentioned tape running stop detection [E and manual reverse operation element 17], the tape can be set in the forward direction. It is capable of running at high speed and traveling at a constant speed in the opposite direction, and is capable of realizing an auto-reverse function and a manual reverse function. In addition, the tape high-speed running operator 2
By switching the forward/reverse switching mechanism using the manual reverse operation element 17 in the 0 operation state, the tape can be made to run at high speed in the forward direction and at high speed in the reverse direction. However, when the tape is running at high speed, the tape running direction is controlled so that when the stop of tape running is detected by the tape running stop detection mechanism, the tape running direction is not reversed but is in a stopped state. In addition, even when the tape is running at a constant speed, if the reverse function selection switch for selecting whether or not to perform the auto-reverse function described above is set to disable auto-reverse, the tape running stop is detected. It is marked so that when the mechanism detects that the tape has stopped running, it will automatically stop.

Figure $4 shows a forward/reverse switching mechanism for switching tape running. That is, a small-diameter gear 2711 is coaxially fitted into the cab and stan 27. This gear 27a is rotated integrally with the flywheel 32 and capstan 27. The gear l'7a is a shaft 3 installed in the main chassis 22.
611, which is rotatably supported by a large-diameter gear 36. Here, the gear 36 includes:
Toothless notches 36b and 36G are formed on the outer peripheries facing each other with the shaft 3611 in between, and when these notches seb and 36C are opposed to the gear 2'lfl, the gears 27a and 36 are The teeth will no longer fit together.

A circular groove 36d along the outer periphery of the gear 36 is formed on one side of the gear 36, and this groove J
6d, and a protruding bottle 37a is loosely fitted at approximately the center of t<-37. Here, the switching lever 37
is the shaft 3 whose pane is installed in the main chassis 22.
It is rotatably supported by 7b. Further, the switching lever 37 is configured such that a coiled spring 37G is engaged between the other end and the main chassis 22, so that the bin J7a is pressed against the inner peripheral wall of the groove 36d. In other words, it is biased counterclockwise in FIG. The switching lever 37 is activated when the spring 37G is activated in a state in which the manual renovator 17 is operated and in a state in which the stoppage of tape running is detected by the tape running stop detection mechanism as described later. It is designed to be rotated clockwise in FIG. 4 against the force.

Here, on the inner circumferential wall of the groove 36d formed in the gear 36, there is a recess sea at a position opposite to the shaft sea.
e and set are respectively formed. Then, with the pins 37a of the switching lever 37 inserted into the recesses 36e and 36f, the notch 36b of the gear 36 is opened.

, 96C are arranged to face the gear 27a. Further, on the outer circumferential wall of the groove J6d, protrusions seg and s are provided at positions facing the recesses see and sef.
eh are formed respectively. And these protrusions 3
6g and 36b, when the switching lever 37 is rotated in the opposite direction in FIG. 4, the pin 37a comes into contact with the gear 3.
6 can be rotated slightly counterclockwise in FIG.
i and sej are formed respectively, and the gear 36
A cam portion 36k eccentric with respect to the shaft 36a is formed on one surface side of the groove 36d and inside the inner peripheral wall of the groove 36d.

The main chassis 22 is provided with a pair of bent pressing pieces 38a, 38b which sandwich the cam part 36k of the gear 36 from the lateral direction in FIG. 4 at an interval corresponding to the maximum diameter thereof.
The reverse slider 38 is supported. This reverse slider 38 is configured such that the bins s8e and asf installed in the main chassis 22 are loosely fitted into long holes ssc and ssd formed at both ends of the reverse slider 38, respectively. It is supported so that it can slide freely in the direction. Then, as described above, in the elongated hole 38g formed approximately at the center of the reverse slider 3B,
The υf curved engagement piece 35d of the tape running direction switching lever 35 is loosely fitted.

Now, as shown in FIG.
8 is slid in the direction of arrow F in FIG. Press in the direction of arrow F, so
The tape running direction switching lever 35 is rotated clockwise in FIG. 4, gears 35b and 23C are meshed, and the tape is running in the forward direction.

In this state, for example, when the manual reverse operation element 17 is operated, the switching lever 37 moves to the position d in FIG.
Since the pin 37F1 is rotated in one direction and presses the inclined portion 36i of the gear 36, the gear 36 is rotated counterclockwise in FIG. 4, and the gear 2 rotated clockwise in FIG.
It is meshed with 7H. Therefore, the gear 36 is rotated counterclockwise in FIG. 4.

Then, as the gear 36 rotates, the cam portion 36k
suppresses the bent pusher piece 38Fi of the reverse slider 38, so the reverse slider 38 is slid in the direction of arrow E in FIG.

Therefore, the other end of the elongated hole 38g of the reverse slider 38 presses the bent engagement piece 35d of the tape running direction switching lever 35 in the direction of arrow E in FIG. The gear 35 is rotated counterclockwise in the middle.
1 and 24C are brought into mesh with each other, and the tape is switched to a reverse running state. Then, the gear 36 rotates half a turn, and the notch 3
6C is opposed to the gear 27a, the switching lever 37
The pin 37a is the U of the gear 36! The first part of the tape enters J6f, the rotation of the gear 36 is stopped, and the tape is stably kept running in the reverse direction.

Further, when the manual reverse operation element 17 is operated again in the tape running state in the reverse direction as described above, the switching lever 37 is rotated clockwise in FIG.
= n presses the inclined portion 36j of the gear 36, so the gear 3
6 is rotated counterclockwise in FIG. 4 and meshed with gear 27H, and as described above, the tooth *St; is rotated counterclockwise in FIG. 4. Then, this time gear 3
Since the cam portion sek of No. 6 presses the bent pressing piece 38b of the reverse slider 38, the reverse slider 38 is slid in the direction of arrow F in FIG. Therefore, as shown in FIG. 4, the gears 35h and 23C are brought into mesh with each other, and the tape is again switched to the forward running state, and the tape is then switched between forward and reverse running.

Then, when the gear 36 rotates half a turn and its notch 36b is opposed to the gear 27a as shown in FIG. is stopped, and thereafter the tape is stably kept running in the forward direction.

Thereafter, each time the manual reverse operator 17 is operated, or each time the tape running stop detecting mechanism detects a stop in tape running as described later, the switching lever 37 rotates clockwise in FIG. The tape forward running state and the tape reverse running state described above are alternately repeated. Therefore, by operating the manual reverse operator 17 while the tape is running at constant speed during playback, recording, etc., a manual reverse function is realized in which the tape constant-speed running direction is reversed at an arbitrary position while the tape is running at constant speed. In addition, an auto-reverse function is realized that automatically reverses the tape constant-speed running direction when the tape running stop detection mechanism detects that the tape has stopped running, that is, when the tape has reached the end of the tape. It is something that can be done.

Further, by operating the manual reverse operator 17 while the tape high-speed running operator 20 is being operated, it is possible to switch between a tape forward high-speed running state and a tape reverse high-speed running state. be.

Here, as can be easily seen from the above explanation, when this cassette tape recorder is in a stopped state where none of the operators are operated, the reverse slider 38
The tape is running in the reverse direction in which the tape is moved in the direction of the arrow E in FIG. 4, or the tape is running in the forward direction in which the reverse slider 38 is moved in the direction of the arrow F in FIG. Which state it is in is determined by the operating state when the previous tape running was stopped.

FIG. 5 shows a mechanism for selectively moving the pinch rollers 29 and 30 toward and away from the capstans 26 and 27 in the tape forward constant speed running state and in the reverse tape constant speed running state. That is, both pinch rollers 29 and 30 are
These pinch levers 29F1.3011 are rotatably supported by shafts 29b and 30b provided at one end of the pinch levers 29a and 30a, respectively. , are rotatably supported by multiplying shafts 2yd and sod, which are provided in the cassette holder 28, respectively.

Here, the pinch lever 29B has an end portion that is latched to a latching portion 29e formed on the pinch lever 298.
A tone spring 29g is mounted so that its central portion wraps around the bearing 29C and its other end is locked to a locking portion 29f formed on the pinch lever 298.

This torsion spring 29g is normally only attached to the pinch lever 298.
I don't have any bias towards it. and,
The pinch lever 2911 has a coiled spring 29 between the end of the torsion spring 29g that is locked by the locking portion 29f and the cassette holder 28.
When h is engaged, it is urged to rotate counterclockwise in FIG. 5. However, the rotation of the pinch lever 292 in the counterclockwise direction in FIG. It is bent until it comes into contact with the engaging piece 39B.

The pinch lever 308 also has one end that is locked to a locking portion soe formed on the pinch lever 303;
A torsion spring 30g is mounted so that its central portion wraps around the bearing SOC and its other end is locked to a locking portion 30f formed on the pinch lever SOa. This torsion spring 30g is normally only attached to the pinch lever 308 and cannot apply any biasing force to the pinch lever 30a. and,
The pinch lever 308 has a coiled spring soh between the end of the torsion spring 30g that is locked on the locking portion sof and the cassette holder 28.
As a result of this engagement, it is urged to rotate clockwise in FIG. However, when the pinch lever 308 is rotated clockwise in FIG. This is done until it comes into contact with the folded engagement piece 39b.

Here, the switching control lever 39 is installed so as to partially overlap the head chassis 28e, and a shaft 39d is installed in the head chassis 28e in a through hole 39G formed approximately in the center thereof. is loosely fitted so that it is rotatably supported in a substantially seesaw shape with respect to the head chassis 28e. This head chassis 28e has a shaft 21jf formed approximately in the center thereof, which is fitted into a substantially cylindrical bearing 28g (shown with hatching in FIG. 5) formed in the cassette holder 28. , which is rotatably supported by the cassette holder 28. And to the above Radshaan 28
e is the fifth one when the playback operator 15 is operated.
The engagement piece 28h protruding from the left end in the figure is indicated by the arrow G in FIG.
By being pressed in the direction, it is rotated clockwise in FIG. 5 about the shaft 28f, and the previous recording/reproducing head 28C
(not shown in FIG. 5).

Further, the switching control lever 39 has bent engagement pieces 39e, 3 on both sides sandwiching the through hole 39G and at the lower middle part of FIG.
9f are formed respectively. Of these, bent engagement piece 3
9e is a state in which the cassette holder 28 is closed,
When the reverse slider 38 is moved in the direction of arrow E in FIG. 5, it is loosely fitted into a recess 3111h formed in the lower part of the reverse slider 38 in FIG. Further, the bent engagement piece 39f is attached to the cassette holder 28.
When the reverse slider 38 is moved in the direction of arrow F in FIG.
The engagement protrusion ssi formed at the lower part of FIG. Furthermore, in the vicinity of the recess 3811 and the engaging protrusion 381 of the reverse slider 38, when the reverse slider 38 is slid in the directions of arrows E and F in FIG. Joining piece 39e.

Slanted portions ssj and 3sk are formed to guide sof so as to face the recessed portion ssh and the engagement protrusion 381, respectively. When the playback operator 15 is not operated, as shown in FIG.
9, 30 are spaced together from the capstan 26.2'l.

Now, as shown in FIG.
It is assumed that the cassette tape recorder is stopped with the tape 8 moved in the direction of arrow F in the figure, that is, the tape is running in the forward direction, and that the playback operator 15 is operated in this state. Then, the tape drive mechanism described above moves the reel shaft 2.
3 is rotated in the counterclockwise direction in FIG.
6, the head chassis 28e is rotated clockwise in the figure as shown in FIG.
is advanced so that it comes into contact with the tape.

At this time, as the head chassis 28e is rotated clockwise in FIG. 6, the switching control lever 39 is also moved upward in FIG. In this case, since the engagement protrusion 381 of the reverse slider 38 is in a position facing the bent engagement piece 39f of the switching control lever 39, the bent engagement piece syf comes into contact with the engagement protrusion sgi. Therefore, the switching control lever 39 is eventually rotated counterclockwise in FIG. 6 using the point of contact between the bent engagement piece ssf and the engagement protrusion 381 as a fulcrum. Therefore, the bent engagement piece 39a of the switching control lever 3g presses one end of the torsion spring 29g upward in FIG.
8 is rotated clockwise in FIG. 6, and the pinch roller 29 comes into contact with the capstan 26 via the tape. When the pinch roller 29 comes into contact with the capstan 26, as shown in FIG.
9e so that the playback operator 1
5. Each movement stroke of the head chassis 28e, switching control lever 39, etc. is set. Therefore, the torsion spring 29g generates a biasing force that rotates the pinch lever 298 clockwise in FIG. 6, and eventually the pinch roller 29 is attached to the capstan 26 via the tape by the biasing force of the torsion spring 29g.

The tape comes into pressure contact, and a forward tape playback state is realized. Note that at this time, the other pinch roller 30 is connected to the bent engagement piece 39b of the switching control lever 39.
moves downward in FIG. 6, and the pinch lever 308 is rotated clockwise in FIG. 6 by the action of the spring 30h, so that it is separated from the capstan 27 by a greater distance than the position shown in FIG. This can contribute to stable tape forward playback.

It is also assumed that the manual reverse operator 17 is operated in an attempt to reverse the tape running direction in the tape forward playback state as described above.

Then, as described above in the description of the forward/reverse switching mechanism, the reverse slider 38 is moved in the downward E direction in FIG. At this time, first, the engagement protrusion 5tii of the reverse slider 38 engages the bent engagement piece 39 of the switching control lever 39
f, and then the inclined portion 3 of the reverse slider 38
8j is brought into contact with the bent engagement piece 39e of the switching control lever 39. Since the playback operator 15 remains locked at the operation position, the head palm 2ge is fixed at position 1 shown in FIG. 6, so the reverse slider 3
8 is moved downward in the E direction in FIG. 6, the bent engagement piece 39e is moved downward in FIG. 6 along the slope ssj. For this reason, the switching control lever 39
is sequentially rotated clockwise in FIG. 6 using the contact point between the bent engagement piece 39e and the inclined portion ssJ as a fulcrum.

Then, the reverse slider 38 is moved sufficiently downward in FIG.
When the switching control lever 39 is moved in the direction (), the bending engagement piece 39e of the switching control lever 39 is fitted into the four parts 38h of the reverse slider 38, as shown in FIG. 7, so that the switching control lever 39 is stably held. . At this time, the fulcrum of the switching control lever 39 is
This is the point of contact between the bent engagement piece 39e and the recess 38h.

At this time, the bent engagement piece 3 of the switching side secondary lever 39
9b connects one end of the torsion spring 3ρg to the seventh
By pressing upward in the figure, the pinch lever SOa is rotated counterclockwise in FIG. 7, and the pinch roller 30 comes into contact with the capstan 22 via the tape. Here, when the pinch roller 30 is brought into contact with the capstan 27, as shown in FIG.
the playback operator 15 so that it is spaced apart from the
Each movement stroke of the head chassis 28e, the switching side secondary lever 39, etc. is set. Therefore, the torsion spring 30g generates a biasing force that rotates the pinch lever SOa counterclockwise in FIG. will be done. Also, at this time, the aforementioned tape drive! The reel shaft 24 is rotated clockwise in FIG. 7 by the lI mechanism,
This is where the tape reverse playback state is realized.

At this time, since the bent engagement piece 39E1 of the switching control lever 39 moves downward in FIG. 7, the pinch lever 298 of the other pinch roller 29 moves counterclockwise in FIG. 7 due to the action of the spring 29h. Since the tape is rotated in the opposite direction, it is spaced further away from the cab suspension 26 than the position shown in FIG. 5, which contributes to stable tape playback in the reverse direction.

Furthermore, if the manual reverse operator 17 is operated again in the tape reverse playback state as described above, the reverse slider 38 will be moved in the direction of arrow F in FIG. Then, the recess 38h of the reverse slider 38
is released from the bent engagement piece 39e of the switching control lever 39,
Then, the inclined portion 38k of the reverse slider 38 comes into contact with the bent engagement piece 39f of the switching control lever 39. and,
Since the playback operator 16 remains locked in the operating position, the rear slider 28e is fixed at the position shown in FIG. 7, so the reverse slider 38 cannot be moved downward in the direction marked F in FIG. Accordingly, the bent engagement piece 39
f is now moved downward in FIG. 7 along the slope 38k. Therefore, the switching control lever 39 is moved to the seventh position with the contact point between the bent engagement piece 39f and the inclined portion 98 as a fulcrum.
They are sequentially rotated counterclockwise in the figure. and,
When the reverse slider 38 is sufficiently moved in the direction of the arrow F in FIG.
The thread is fixed to the engagement protrusion 381 and held stably, thereby realizing the tape forward playback state as described above.

Now, in the state shown in FIG. 5 again, assume that the reverse slider 38 has been moved in the direction of arrow E in the figure, that is, the cassette tape recorder is stopped with the tape running in the reverse direction. Assume that the operator 15 is operated. At this time, the four parts 38h of the 1-niverse slider 38 are already fitted into the bent engagement piece 39B of the switching control lever 39, so the head chassis 28e is rotated clockwise in FIG. Accordingly, the switching control lever 39 is rotated clockwise in FIG. 5 using the contact point between the bent engagement piece 39e and the recess 3sh as a fulcrum.
Eventually, a tape reverse playback state is realized as shown in FIG. Thereafter, each time the manual reverse operation element 17 is operated, the states shown in FIGS. 6 and 7 described above are alternately repeated.

Here, the above describes the pinch rollers 29, , ? in the manual reverse function of reversing the tape running direction by operating the manual reverse operator 17. 0 control has been explained, but this can be explained in exactly the same way for an auto-reverse function that automatically reverses the tape running direction when the stop of tape running is detected by the tape running stop detection mechanism. It goes without saying that the control of the pinch rollers 29 and 30 can also be explained in the same manner as described above even in the recording state in which the playback operation element 15 and the recording operation element 16 are operated together. .

Therefore, according to the mechanism for selectively bringing the pinch rollers 29, 30 into contact with the capstans 26, 27 as explained in FIGS. 5 to 7 above, the capstans 26, 21
Since the pinch rollers 29 and 30 that are in contact with the capstans 26 and 27 are moved in the direction of contact with the capstans 26 and 27 via the switching control lever 39, it is possible to reduce the operating force of the playback operator 15, and The motor 25
It is also possible to reduce the load on.

In other words, in this regard, the conventional pinch roller control means uses springs to urge both pinch rollers in the direction of bringing them into contact with both capstans, and utilizes the operating force of the playback operator and the moving force of the reverse slider. Then, one pinch roller is pulled away from the capstan against the biasing force of the spring. Therefore, as the pinch roller is pulled away from the capstan against the biasing force of the spring described above, the operating force of the regeneration operator and the moving force of the reverse slider, that is, the load applied to the motor, increase. . In this case, in order to press the pinch roller against the capstan and ensure stable running of the tape, the above-mentioned spring inevitably requires a biasing force of a certain degree or more, and this biasing force is required for playback. This places a large load on the controller and motor.

However, as mentioned above, the spring 29h.

30h, the pinch rollers 29.30, which are urged away from the capstans 26.27, are selectively moved in the direction of being brought into pressure contact with the capstans 26.27. zyh,s
oh is simply a pinch roller 29, . 90 from the capstan 26, 27, and it is sufficient that this biasing force is much stronger than the biasing force of the conventional spring, so the operation force of the regeneration controller 15 is sufficient. Also, the moving force of the reverse slider 38, that is, the load applied to the motor 25 can be reduced.

In addition, the switching control lever 39 is operated at the contact point between the bent engagement piece 39f and the engagement protrusion ssi, as shown in FIGS. Since the bending engagement pieces 39e and the recesses 38h are rotated using their contact points as fulcrums, each rotation stroke of the bending engagement pieces 39a, 39b, that is, the movement of the pinch rollers 29, 30, can be achieved in a narrow space. It is possible to take a large stroke and downsize the cassette tape recorder (which is quite effective).

Then, as described above, the switching restriction lever 39 is moved to the reverse slider 38 position and rotated in different directions, and the springs z9h and sθh are biased in the direction in which the capstan 26°27 is tilted. The pinch levers 29.2, 30a are moved in the direction in which the pinch rollers 29.30 are brought into contact with the capstans 26.27, thereby selectively moving the pinch rollers 29.2, 30 toward the capstans 26.27.
A feature of the present invention is that it is brought into pressure contact with the material.

Next, FIG. 8(a) shows the tape high-speed running operator 2.
The reel shaft 2 is operated in the axial direction by the operation of
This shows the details of 3. That is, the main chassis 22 is provided with a portion where the reel shaft 23 is left out.
A through hole 23d is formed. A substantially cylindrical bearing 23e is implanted in the through hole 23d.
3e, the axis zsf passes through it. This shaft 23f is located between a recess 23g formed in the upper part of the bearing 23e in FIG. 8(a) and a washer 23h fitted in the upper end part of the shaft zsf in FIG. 8(a). By intervening a coiled spring zsi, the result shown in Fig. 8 (
a) It is biased towards the upper middle part. In addition, a substantially conical operating section 2sj is formed in the middle lower part of the shaft 23f (FIG. 8) below the main chassis 22. When the operator 20 is not operated, the lock lever 40 and the switch lever 41 are engaged with the inclined portion 23k.

Here, the lock lever 40 is for locking the shaft 23f in the position when the tape high-speed running operator 20 is operated and the shaft 23f is moved downward in FIG. . Further, the switch lever 41 engages and disengages a relief switch, which will be described later, for connecting and disconnecting the governor circuit that controls the rotational speed of the motor 25 to and from the motor 25. This controls the on/off state. The lock lever 40 and the switch lever 41 are both biased so as to come into pressure contact with the operating portion 23j.

Further, a substantially cylindrical holder 231 is rotatably fitted on the outer peripheral side of the bearing 23e. The middle lower part of this holder 231 in FIG. 8(a) is 1. Formed in @ shape,
The gear 23B is used as the gear 23B. Furthermore, the bearing 2
A reel cap 23m, which is fitted to the reel hub of the compact tape cassette, is rotatably fitted to the outer peripheral side of the tape cassette 3e. The reel cap 23m is biased toward the upper middle of FIG. 8 (the body of FIG. 8 by interposing a coiled spring 23n between the lower end of Al and the gear 23a). The upward movement of the reel cap 23m in FIG. 8 is such that the upper end of the reel cap 23m in FIG.
8(a) until it comes into contact with a washer 230 attached to the upper middle part.

Here, the reel cap 23m and the holder 231 are fitted so that they are aligned with each other, as shown in FIG.
Although the holder 231 and the holder 231 can slide relative to each other along the axis 23f, they are designed to rotate integrally with respect to rotation.

When the tape high-speed running operator 20 is operated, the upper end of the shaft 23f in FIG. 8(a) is pressed upward in the same figure, and the shaft 23f moves as shown in FIG. 8(b). , is slid downward in the figure against the biasing force of spring zsi. At this time, the lock lever 40 is once moved along the inclined part 23k of the operating part 23j in the 81M (bll left/left direction), and then is moved to the bottom part 23p of the operating part 2sj, as shown in FIG. 8(b). At this time, the switch lever 4 is moved along the inclined portion 23k of the operating portion 23j in the direction shown in FIG. 8 (b>inner cloth direction). The switch lever 41 acts to turn on the leaf switch and disconnect the governor circuit from the motor 25.As is clear from FIG.
It is made so that it is not locked to the bottom surface part 23p of j.

Here, FIG. 9 shows the lock lever 40, the switch lever 4], and the tape running stop detection mechanism. That is, the lock lever 40 is formed in an oval shape, and one end thereof faces the operating portion 23j of the reel shaft 23. Further, this lock lever 40 is connected to a shaft 4 installed in the main chassis 22.
It is rotatably supported by 0a. The lock lever 40 is urged to rotate counterclockwise in FIG. 9 by a spring (not shown), and one end thereof is pressed against the operating portion 23j.

The switch lever 41 has one end rotatably supported by a shaft 41E1 implanted in the main chassis 22, and a bent engagement piece 41 formed approximately at the center thereof.
b is opposed to the reel shaft 23 and the reel 4123j. This switch lever 41 is rotated counterclockwise in FIG. 9 by a coiled spring 41d being engaged between a hook portion 41C protruding from one end thereof and the main chassis 22. It is dynamically biased and its bent engagement piece 41b is brought into pressure contact with the operating portion zsj.

Here, an engaging protrusion 41e is formed at the other end of the switch lever 41. This engagement protrusion 41e is connected to the leaf switch 42 attached to the main chassis 22.
One contact piece 42a of the pair of contact pieces 42a, 42b
is faced with. The leaf switch 42 is normally in an off state, and when turned on, acts to disconnect the governor circuit from the motor 25.

For this reason, it is now assumed that in the stopped state shown in FIG. 9, the tape high-speed running operator 20 is operated and the reel shaft 23 is suppressed as shown in FIG. 8(b). Then, as shown in FIG. 1O, one end of the lock lever 40 is first engaged with the bottom surface 23p of the operating portion 23j, thereby locking the shaft 23f at the operating position. Furthermore, the switch lever 41 is rotated clockwise in FIG. is pressed to turn on the leaf switch 42. Therefore, the governor circuit is disconnected from the motor 25, and the motor 25 is rotated at high speed. At this time, if the forward/reverse switching mechanism is in a state that supports forward running of the tape, the tape will run at high speed in the forward direction, and if it is in a state that supports running of the tape in the reverse direction, the tape will run at high speed in the reverse direction. This is where high-speed tape running begins. While the tape is running at high speed, by operating the manual reverse slider 12, the tape is moved in the stray running direction IJJ as described above.
It is something that can be replaced.

Therefore, as described above, the reverse slider 38 of the forward/reverse switching mechanism is associated with the tape running direction switching lever 35 of the tape drive mechanism, and the tape running direction can be switched in the correct direction by operating the manual reverse operator 17 when the tape is running at high speed. By using a reverse switching mechanism, there is no need for independent mechanisms to achieve high-speed tape running in the forward and reverse directions, and the same tape drive mechanism can handle both constant-speed tape running and tape running in the reverse direction. It is possible to switch the direction of tape running during high-speed running, and the configuration is extremely simplified, thereby effectively promoting miniaturization of the cassette tape recorder. Since only one reel shaft 23 is used for high-speed tape running,
As will be described later, the other reel shaft 24 can be used to lock the cassette lid 13 in the closed position, especially when the compact tape cassette 12 is installed protruding from the cabinet 11 as shown in FIG. This is extremely effective for small-sized cassette tape recorders of this type.

In this regard, a conventional reel shaft operation type cassette tape recorder uses a pair of reel shafts for fast forwarding and rewinding operations, respectively, as shown in Japanese Patent Laid-Open No. 58-80147. . For this reason,
The pair of reel shafts must be constructed so that they can be operated and locked at the operating position, and independent parts, gears, etc. are provided to fast forward and rewind the tape in response to the operation of each reel shaft. This complicates the structure and prevents the miniaturization of cassette tape recorders such as those mentioned above.

However, by making it possible to control each tape running direction through the forward/reverse switching mechanism in constant speed tape running and high speed tape running states as described above, all tape running can be realized with the same tape drive mechanism. The structure can be simplified, and the cassette tape recorder can be made more compact than ever before. In addition, in the conventional cassette tape recorder shown in the above publication number, the compact tape cassette is completely stored in the cabinet with the cassette lid closed, so a locking mechanism for the cassette lid must be provided in the cabinet. However, in the cassette tape recorder shown in FIG. 1, which has been further miniaturized than the conventional cassette tape recorder, a means for reliably locking the cassette lid 13 in the closed position has become a major problem. Then, as mentioned above, the manual reverse operator 1 is used to switch the tape running direction when the tape is running at high speed.
7 through the forward/reverse switching mechanism, it is only necessary to operate only one reel shaft 23, disconnect it from the motor 25 which is the governor circuit, and set the motor 26 in a high speed rotation state. The shaft 24 can be used for locking the cassette lid 13, and in this respect as well, the cassette tape recorder can be made more compact.

Moreover, in this case, since the switching operation means for separating the motor 25 for constant speed tape running from the motor 25, which is a panar circuit, and for setting the motor 25 in a high speed rotation state, is mounted on the reel shaft 23, the cabinet 1 The configuration can be simplified without the need to newly install an operator on the top. Further, since the shaft 23f of the reel shaft 23 is operated in the axial direction, the leaf switch 42 is only turned on via the switch lever 41, so that the above-mentioned conventional reel shaft operation type cassette tape recorder Compared to a system in which each member, gear, etc. of the tape drive mechanism is directly operated by the reel shaft, the structure is much simpler and the operating force can be reduced.

Next, the tape running stop detection mechanism will be explained.

That is, as shown in FIG. 9 again, of the gear 35b meshed with the gear 26H of the capstan 26, a shaft 35a is provided on the surface opposite to the surface facing the gear 35C.
The eccentric cam portion 35j is eccentric with respect to the eccentric cam portion 35j, and the eccentric cam portion 3
A substantially arc-shaped engaging portion 35 is formed opposite to the small-diameter portion 5j. Furthermore, a friction lever 43 is provided on the surface of the gear 35C that is frictionally engaged with the gear J 5 b, on the opposite side to the surface facing the gear 35b. The friction lever 43 has one end rotatably supported by the shaft 35B and is frictionally engaged with the gear 35C, and is biased in the direction of rotation when the gear 35C is rotated. It is.

A long hole 4ja is formed at the other end of the friction lever 43, and a pin 44a projecting from one end of the drive lever 44 is loosely fitted into the long hole 43a. Here, the drive lever 44 is rotatably supported at its substantially central portion by a shaft 44b implanted in the main chassis 22, and at its other end - the eccentric cam portion 35j of the gear 35C. and a protrusion 44C that can engage with the engaging portion 35, and a protrusion 44d that can engage with one side of the switching lever 37.
is formed.

Furthermore, a bottle 40 is provided at the other end of the lock lever 40.
b is planted, and the bottle 40b is connected to the regeneration lock lever.
It is loosely fitted into a recess 45a formed at one end of the recess 45. This regeneration lock lever 45 has a substantially central portion rotatably supported by a shaft 45b implanted in the main chassis 22, and the other end thereof is engaged with an operating portion 25a provided on the regeneration operator 15. 7, which can lock the playback operator 15 in the operating position.

That is, the operating section 15a has the same configuration as the operating section zsj provided on the shaft 23f of the reel shaft 23, and the lock lever 40 is biased counterclockwise in FIG. Therefore, the regeneration lock lever 45 is urged to rotate in the direction 11 in FIG.
By being pressed against the regeneration lock lever 45, the other end of the regeneration lock lever 45 is locked to the bottom surface 15b of the operation section 151 when the regeneration operation element 15 is operated. .

Further, a bent engagement piece 41f is formed at the other end of the switch lever 41, and this bent engagement piece 4xf is an engagement piece 4 formed at one end of the reverse function selection lever 46.
It is opposite to 6a. This reverse function selection lever 4
6 is rotatably supported by a shaft 46b implanted in the main chassis 22 at its substantially central portion, and the other end serves as the aforementioned reverse function selection switch 46C. A shaft 46d is implanted at the other end of the reverse function selection lever 46, and a substantially central portion of an automatic stop lever 47 is rotatably supported by this shaft 46a.

The automatic stop lever 47 has a protruding piece 47a formed at one end that can be engaged with a bent engagement piece 40C formed on one side of the lock lever 40. The automatic stop lever 47 also has the drive lever 4 at the other end.
An engaging piece 47b that can be engaged with the protrusion 44C of No. 4 is formed.

Here, the reverse function selection lever 46 is operated by the user when the reverse function selection switch 46C is pressed by the arrow H in FIG.
An automatic stop function is required that automatically stops the tape when it reaches the end without performing the auto-reverse function when the tape is operated in the opposite direction. Further, the reverse function selection lever 46 is an automatic switch that automatically reverses the tape running direction when the tape reaches the end when the user operates the reverse function selection switch 46C in the direction of the arrow 1 in FIG. A reverse function will be required. Furthermore, when the reverse function selection switch 46C is operated in the direction of the arrow H in FIG. 9, that is, when the reverse function selection lever 46 is rotated counterclockwise in FIG. The protruding piece 47a
and the engaging piece 47b is the bent engaging piece 40 of the lock lever 40.
G and the protrusion 44C of the drive lever 44, respectively, and the reverse function selection switch 46C is located at the ninth position.
When operated in the direction of the arrow in the figure, that is, clockwise in Figure 9! When the automatic stop lever 47 is rotated twice, the automatic stop lever 47 is placed in a position where its protrusion piece 47a and engagement piece (7b) do not face the bent engagement piece 40C of the lock lever 40 and the protrusion 44C of the drive lever 44, respectively. It is.

Assume that the cassette tape recorder is now in a stopped state and the tape high-speed running operator 20 is operated. Then, as shown in FIG.
The operating portion 23j is locked to the lever 40, and the switch lever 41 is rotated clockwise in FIG. 10 by the action of the operating portion 23j, turning on the leaf switch 42 and causing the motor 25 to rotate at high speed state, and the tape is run at high speed in the forward or reverse direction.Here, when the switch lever 4 is rotated clockwise in Fig. 1O,
The bent engagement piece 41f presses the engagement piece 46Fk of the reverse function selection lever 46, and eventually the reverse function selection lever 46 is forcibly rotated in the counterclockwise direction in FIG. 10 and is automatically stopped as described above. The feature is set to the requested state. At this time, as described above, the protrusion piece 47a and the engagement piece 47b of the automatic stop lever 47 are opposed to the bent engagement piece 40C of the lock lever 40 and the protrusion 44G of the drive lever 44, respectively.

Here, when the tape is running stably at high speed,
The garage', 35b, and 35C are all rotated clockwise in FIG. 1O. Therefore, the M rubbing bar 43, which is frictionally engaged with the gear 95C, is urged to rotate clockwise in FIG. 10, and the drive lever 44 is also urged to rotate in the same direction. This is because the portion 44C is pressed against the circumferential surface of the eccentric cam portion 35j formed on the gear 35b. At this time, the drive lever 44 performs a swinging motion in accordance with the rotation of the eccentric cam part 35j without its protrusion 44G being engaged with the engaging part 35k of the garage seb, so that a stable tape high speed can be achieved. The running condition is maintained.

When the tape reaches the end in such a high-speed tape running state and the rotation of the reel shafts 23, 24 stops, the rotation of the gear 35C is also stopped in conjunction with this. Then, since no rotational bias is applied to the friction lever 43, no biasing force is applied to the drive lever 44 to press its protrusion 44C against the curved surface of the eccentric cam part ssj.

On the other hand, since the gear 35b continues to rotate as the rotational force of the motor 25 is transmitted, the drive lever 44 eventually oscillates at the position where its protrusion 44C is pressed by the maximum diameter portion of the eccentric cam portion 35J. dynamic movement is stopped. At this time, when the gear 35b is further rotated, the protrusion 44C of the drive lever 44 engages the engagement portion ss of the tooth jtL35b, as shown in FIG.
Since it rides on the outside of k, the drive lever 44 is largely rotated counterclockwise in the figure ix1.

Then, the protrusion 44C of the drive lever 44 engages with the engaging piece 47a of the automatic stop lever 47, and rotates the automatic stop lever 47 clockwise in FIG. For this reason, the protruding piece 47a of the automatic stop lever 47 is attached to the lock lever 4.
The lock lever 40 is rotated clockwise in FIG. 11 by pressing the bent engagement piece 40C. This allows one end of the lock lever 40 to touch the bottom surface 23 of the operating section 23j.
Since the reel shaft 23f is released from the tape p, the shaft 23f of the reel shaft 23 is returned to the non-operating position by the biasing force of the spring 231 shown in FIG. 8, and automatic stopping is performed at this point when the tape is running at high speed.

Next, assume that the playback operator 15 is operated while the cassette tape recorder is in a stopped state. Then, the ninth
As shown in the figure, the bottom surface portion 15b of the operating section 15a provided on the playback operator 15 is locked by the playback lock lever 45, and the playback operator 15 is locked in the operating position, and the tape is rotated in the correct position as described above. The vehicle is driven at a constant speed in either direction or in the opposite direction. When the tape is running stably at a constant speed, the gears 35b and 35C are both rotated clockwise in FIG. 9, although at a slower speed than when the tape is running at high speed. Drive lever 4 as explained in
4 performs a rocking motion in accordance with the rotation of the eccentric cam portion 35j, thereby maintaining a stable tape running state at a constant speed.

In such a constant tape running state, in order to automatically stop the tape when it reaches the end, the reverse function selection lever 46 is set to the reverse function selection switch 46C.
is moved in the direction of arrow H in FIG. 9 and rotated counterclockwise in FIG. The protrusions 44C of the drive lever 44 are made to face each other. Then, the tape reaches the end and gear 3
When the rotation of the drive lever 44 is stopped, the protrusion 44C of the drive lever 44 moves to the automatic stop lever 4, as described above with reference to FIG.
7, and the lock lever 40 engages with the 11th engagement piece 47b.
The regeneration lock lever 45 is rotated clockwise in the figure, and the regeneration lock lever 45 is accordingly rotated counterclockwise in FIG. Since the operation section 15H is detached from the bottom surface 15b, the reproduction operation element 15 is returned to the non-operation position, and the tape reproduction state is automatically stopped at this point.

In addition, in the tape playback state shown in FIG. 9, in order to perform the reverse operation when the tape reaches the end, the reverse function selection lever 46 and the reverse function selection switch 46C are moved in the direction of the arrow (■) in FIG. 9, and rotate it clockwise in FIG. 9, so that the protrusion piece 47a and the engagement piece 47b of the automatic stop lever 47 are attached to the bent engagement piece 40C of the lock lever 40 and the protrusion 44G of the drive lever 44, respectively. Avoid facing each other.

Then, the tape reaches the end, the rotation of the gear 35C is stopped, and as mentioned earlier, the protrusion 44C of the drive lever 44
even if the drive lever 44 is rotated counterclockwise in FIG. First, the automatic stop lever 41 is prevented from rotating clockwise in FIG. 9. For this reason, the regeneration lock lever 4
5 is not moved at all, and the playback operator 15 remains locked at the operating position.

At this time, as shown in FIG. 11, with the drive lever 44 rotated counterclockwise in the figure, the other protrusion 44
d presses one side of the switching lever 37 and rotates the switching lever 37 clockwise in FIG. For this reason,
As described above in the description of the forward/reverse switching mechanism, the reverse slider 38 is driven, the tape running direction is reversed, and an auto-reverse operation is performed in the tape playback state.

Furthermore, it goes without saying that the automatic stop operation and auto-reverse operation described above can be similarly explained not only in the tape playback state but also in the tape recording state. However, in the case of recording, the tape is automatically stopped or switched to the playback state after one round trip by a mechanism not shown.

Next, FIG. 12 shows the attached state of the gears 35b, 35c and the friction lever 43. That is, the shaft 35a implanted in the main chassis 22 includes a base portion 351 with a large diameter and a tip portion 35m with a small diameter. The tip of this shaft 95a is fitted into a through hole 48a formed in a sub-chassis 48 arranged in parallel with the main chassis 22.

Here, a substantially cylindrical support member 49 that can support the gears 35b and 35C in frictional engagement with each other is loosely fitted onto the shaft 35a, details of which will be described later. A substantially cylindrical support portion 35n formed at the center of the gear 35b is fitted on the outside of the support member 49. In this case, the flange 49H formed at the lower end of the support member 49 in FIG.
By locking the stepped portion 360 formed at the upper part of the figure, the gear 35b is prevented from coming off the support part 49 upward in FIG. 12.

Further, the support portion 35n of the gear 35b has a through hole 35p formed in the center thereof on the outside thereof.
It is rotatably supported by being loosely fitted. Further, a ring-shaped friction portion is interposed at an angle of 50° between the gears 36b and 36G. Here, the gear 35C
A substantially cylindrical support portion 35q is formed on the lower surface in FIG. 12 so as to surround the through hole 35p. Further, a large diameter flange portion 49 is provided at the lower end portion of the support member 49 in FIG.
b is formed.

A coiled spring 49C is loosely fitted into the support portion 35q of the gear 35C.

This spring 49C is engaged between the bottom surface of the support part 35q and the collar part 49b of the support member 49, so that
This urges the gear SSC upward in FIG. 12. Therefore, the gear 35C is connected to the gear 35b via the friction member 50.
The gears 35b and 35C are frictionally engaged with each other.

Here, in order to assemble the gears ssb and ssc into a state of frictional engagement, first, the gear 35C is loosely fitted into the support portion 35H of the gear 35b via the friction member 50. Then, the spring 49C is loosely fitted between the support part asn of the gear 35b and the support part 35q of the gear 35G, and finally the support member 49 is inserted into the support part 35n of the gear 95b from below in FIG. It is done by

Here, at the upper part of the support member 49 in FIG. 12, as shown in FIG.
A plurality of (four in the illustrated case) notches 49d are formed in the vertical direction including 9B. Note that FIG. 13 (bl shows a cross-section of the same IJ (a) along the arrow It can be inserted from below, and the flange 49a fits into the step 35 of the gear 35b.
0, the flange portion 49E1 expands and the stepped portion 35
01 knee is now locked, and here is the gear 35b.

35C can be supported in a frictional engagement state. That is, the gears 35b, 35c1, friction member 50, and spring 49C are supported by the support member 49 as one unit.

And, before the subchassis 48 is installed,
The support portion 49 is loosely fitted onto the shaft 35a from the flange 49a side. The depth of this loose fit is such that the step 49e formed inside the support member 49 is locked to the step between the base 351 and the tip 35m of the shaft 35a.

In the above state, the support part 35q of the tooth 35c is
A ring-shaped friction member 51, one end of the friction lever 43, a washer 52, and a coil-shaped spring 53 are loosely fitted into each other. Here, the diameter of the spring 53 is formed to be larger than the diameter of the flange 49b of the support member 49. Therefore, when the sub-chassis 48 is attached, the friction lever 43 is caused to frictionally move due to the biasing force of the spring 53. It is pressed into gear 35C through member 5, and there are teeth here! , 95C and the friction lever 43 are frictionally engaged.

Therefore, depending on the mounting means for the gears 35b and 35C as described above, the support portion H49 can be attached to the support portion 35n of the gear 35b.
It is possible to support both gears ssb and ssc in a state of frictional engagement simply by inserting them into the holder, making assembly work extremely easy, and supporting the gears reliably.

Further, the support member 49 can be easily manufactured by molding a synthetic resin material, and the structure can be simplified.

Here, in the above-described attachment means for gears 35b and 35C,
Since the flange 49a of the support member 49 is locked to the stepped portion 350 of the gear 35b, the support portion 49 is attached to the gear 35b.
5b. By the way, there is no problem with the support part 49 if it is completely rotated integrally with the gear 35b, but since the gear 35b is used for both constant speed tape running and high speed tape running, the rotational speed and Torque etc. are changed. Therefore, a slip occurs between the support member 49 and the gear 35b, and the gear 35b slips.
If the supporting member 49 rotates or stops even when the gear 5b is rotated, a problem arises in that the rotational speed of the gear 35b becomes uneven, which in turn adversely affects tape running.

Therefore, as shown in FIG. 14, the stepped portion 35 of the gear 35b
0, a protrusion 49f is formed corresponding to the notch 4yd of the support member 49, and the flange 49a of the support member 49 is aligned with the gear 35.
The protrusion 49f is fitted into the notch 49d while being locked within the step 350 of b. Then, the support member 49 can be rotated completely integrally with the gear 35b without slipping.

Further, the support member 49 has a first flange 4b on the other side.
A protrusion 49g as shown in FIG. 5 is formed. This protruding portion 49g has a portion 49b that is flush with the circumferential side of the flange portion 49b. In this case, gear 3
Assuming that the supporting member 49 is rotated in the same direction as the arrow in the figure in conjunction with the rotation of the coil spring 5b, the winding direction of the coiled spring 53 is such that the end facing the protruding portion 49g protrudes. The tip of the spring 53 is oriented so as to provide relief from the portion 49g, that is, when the support member 49 is rotated, the tip of the spring 53 does not come into contact with the protruding portion 49g.

Therefore, when the support member 49 is rotated in the direction of arrow J in FIG. 15 as the gear 35b rotates, the spring 53
The end facing the protruding portion 49g is pressed by the portion 49h of the protruding portion 49g, and is pushed out so as to spread further outward than the flange portion 49b. Therefore, by fitting the end of the spring 53 between the flange 49b and the sub-chassis 48, it is possible to prevent the rotation of the support member 49 and, by extension, the rotation of the gear ssb from being adversely affected. This allows the tape to run.

Next, with the cassette lid 13 in the closed position, the other reel shaft 2
4 will be explained. That is, in FIG. 16, the flat surface of the cassette lid 13 has through holes 13b for attaching the stop operator 14, the playback operator 15, the manual reverse operator 17, the display section 18, etc.
13e to 13e are formed, respectively. Further, a through hole 13f for rotatably attaching the cassette lid 13 to the cabinet 11 is formed in the side of the pant portion 133 of the cassette lid 13.

The cassette lid 13 has the eject operator 21 and the lock slider 5 on the bottom side in FIG.
The support body 55 supporting the 4 etc. is sorbed. That is, the support body 55 has a substantially plate shape and is attached to the cassette lid 1.
A main body part 55C has a through hole 55a and a cutout part 55b formed in a part facing the window part 19 of No. 3 and the high-speed tape running operator 20, and a main body part 55C that follows the shape of the cassette lid 13 from both ends of this main body part 55C. It consists of protruding abbreviated arm parts ssd and sse.

Further, the main body portion 55C of the support body 55 has a through hole 5 therein.
On the opposite side of the notch 55b of 5B, long holes 55f, 55
g is formed. Of these, the top of the reel shaft 24 is loosely inserted into the long hole ssf with the cassette lid 13 closed. In addition, the main body portion 55G
At the end of the side where the arm portion 55e is formed,
A stepped portion 55h is formed in a planar shape, and a long hole ssj is also formed in the eave-like portion s5i of this stepped portion 55h.

Here, the lock slider 54 is formed by bending a metal plate into a substantially crank shape, and its -blade portion 54F1
A substantially rectangular through hole 54b is formed at a position facing the long hole ssf of the support body 55. The lock slider 54 also has long holes ssf and ss in the support body 55.
Screw holes 54C, 54d, and 54e are formed at positions facing the eaves-like portion ssi of the stepped portion ssh and the stepped portion ssh, respectively.

The lock slider 54 has the other portion s4f.
from the lower surface side of the support body 55 in FIG.
j, so that one blade portion 54a and the other portion 54f of the lock slider 54 are brought into contact with the lower surface of the support body 55 in FIG. 16 and the upper surface of the eave-like portion ssi, respectively.

On the other hand, the ejector 21 is formed in the shape of a planar path, and is inserted into the screw hole 54 of the lock slider 54.
Through holes z1a, zlb, 2 are provided at positions facing C to 64e.
1c is formed in a rough shape. A generally cylindrical spacer portion 2Jd is formed on the lower surface side of the ejector operator 21 in FIG. 16 so as to surround the through hole 21a and to be loosely inserted into the through hole ssf of the support body 55. Further, on the lower surface side of the ejector operator 21 in FIG. 16, a protrusion 21e is formed near the through hole 21b to be loosely inserted into the elongated hole 55g of the support body 55.

As described above, after installing the lock slider 54 on the lower surface side of the support body 55 in FIG. Eject operator 2 from the top side in Figure 16
1 and tightened with screws 57. Then, as shown in FIG. 17, the spacer portion 21d of the ejector 21 is loosely fitted into the elongated hole 55f of the support 55, and the through hole 21a of the ejector 21 and the spacer portion 21d
The screw 57 that has been inserted is inserted into the screw hole 5 of the lock slider 54.
It is screwed onto 4C. The protrusion 21e of the ejector 21 is loosely fitted into the long hole 55g of the support 55, and the screw 57 is inserted through the through hole 21b of the ejector 21.
is screwed into the screw hole 54d of the lock slider 54.

Furthermore, the screw 57 inserted through the through hole 21C of the ejector 21 is screwed into the screw hole 54e of the lock slider 54, and the ejector 21 and the lock slider 54 sandwich the support body 55 therein, so that the ejector 21 and the lock slider 54 are supported. It is supported by the body 55 at the lower mark in FIG. 16 so as to be slidable in the L direction.

In this case, the spring 56. is one end of the elongated hole 55g of the support body 55 and the protrusion 21e of the ejector operator 21.
The eject operator 21 is engaged between the
(including the lock slider 54) is now biased in the direction indicated by the arrow in FIG. At this time, one end of the eject operator 21 projects outward from the end of the cassette lid 13. Then, the user pushes the ejector 2 into the first position against the biasing force of the spring 56.
Suppressing operation is possible in the direction of the arrow in Figure 7.

As described above, the support body 55 on which the eject operator 21 and the lock slider 64 are supported is attached to the cassette lid 13.
It is attached to the lower surface side in FIG. 16. In this case, the portion of the cassette lid 13 facing downward in FIG. 16 that faces the ejector operator 21 is a thin wall portion 13g, as shown in FIG. The portion is brought into close contact with the support body 55 and fixed, for example, with an adhesive or the like.

Here, as shown in FIG. 17, a substantially conical lock portion 24d is formed at the top of the reel shaft 24. As shown in FIG. This lock portion 24d is formed in a substantially umbrella shape at the tip of a shaft 24e which is implanted in the main chassis 22 and is the center of the reel shaft 24. The shaft 24e does not rotate, and the lever cap 24f is rotatably supported on the shaft 24e.

Here, assume that the cassette lid 13 is currently in the open state and that the cassette lid 13 is now in the closed state. Then, one end of the through hole 54b of the lock slider 64 is pressed by the inclined portion 24g of the lock portion 24d, and the lock slider 54 is moved in the direction indicated by the arrow in FIG. 17 against the biasing force of the spring 56. . Then, when the cassette lid 13 is completely closed, as shown in FIG. 17, one end of the through hole 54b of the lock slider 54 is opposed to the bottom surface 24h of the lock portion 24d, so that the lock slider 64 is pressed against the spring. It is returned to its original position by the urging force of 56, and the above-mentioned through hole 5
One end of the cassette 4b is engaged with the bottom surface 24h of the locking portion 24d, and the cassette lid J3 is locked here in the closed position.

In addition, when the ejector 2 is operated in the direction of the arrow in FIG. 17 with the cassette lid 13 in the locked state as described above, one end of the through hole 54b of the lock slider 54 will move away from the bottom surface 24h of the locking portion 24d. The cassette lid 13 is now unlocked in the closed position, and the cassette lid 13 is removed.
can be opened.

Therefore, as described above, by supporting the eject operator 2I and the lock slider 54 on the support 55 and attaching the support 55 to the cassette lid 13, the cassette lid 13 can be kept closed. Only the part of the ejector 2' that is pressed by the user is exposed to the outside, and the lock slider 54 is not visible from the outside at all, so it does not spoil the aesthetic appearance of the cassette tape recorder and is easy to install. The configuration ensures that the eject operator 2
1 and lock slider 54 can be attached.

In addition, the head of the screw 57 is made so that it cannot be touched from the outside both when the cassette lid 13 is in the open state and in the closed state, which makes it structurally effective. be.

Next, as shown in FIG. 18, the main chassis 22
Of these, a connection terminal portion 58 is provided near the reel shaft 24 that locks the cassette lid 13 in the closed position, with which a connection terminal provided on the tuner pack mentioned above comes into contact when the tuner pack is attached. ing. That is, when the tuner pack is attached to the cassette tape recorder, the tuner pack has two flat parts facing the main chassis 22.
Connecting terminals that come into contact with the respective connecting terminals 58a of the connecting terminal section 58 are provided in a protruding manner so that signals can be transmitted between the tuner pack and the cassette tape recorder r5.

As described above, by wiring the connection terminal portion 58 that is to be connected to the tuner pack near the reel shaft 24, it is possible to securely establish an electrical connection with the tuner pack. . That is, when the cassette lid 13 is closed, the part locked to the reel shaft 24 will be supported most reliably, so the connection terminal part 58 connected to the tuner pack is placed near the reel shaft 24. By arranging the connection terminal of the tuner pack and the connection terminal 5 of the cassette tape recorder,
This allows reliable contact with radio station 8a and good radio reception.

Here, as the connection terminal 58B, FIG.
l, (bl, (as shown in C1, reel shaft 2
The reel shaft 24 may be arranged in a circle surrounding the reel shaft 24.
It goes without saying that they may be arranged in two directions on both sides of the shaft 24, or may be arranged in an arc shape along the circumference of the shaft 24.

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

〔Effect of the invention〕

Therefore, as detailed above, according to the present invention,
When moving the pinch roller toward and away from the capstan when switching between forward and reverse tape running directions, it is possible to reduce the operating force of the tape constant speed running operator and the load applied to the motor, and it is also an extremely good design suitable for downsizing. A tape recorder device can be provided.

[Brief explanation of the drawing]

Fig. 1 is an external view showing a cassette tape recorder to which the present invention is applied, Fig. 2 is an external view showing the tape recorder mechanism of the cassette tape recorder, and Fig. 3 is a tape drive of the tape recorder mechanism. Fig. 4 is a block diagram showing the forward/reverse switching mechanism of the tape recorder mechanism, and Fig. 5 shows an embodiment of the tape recorder device according to the present invention. FIG. 6 and FIG. 7 are diagrams showing the configuration of the pinch roller control mechanism, respectively, and FIG. 8 is a diagram for explaining the operation of the pinch roller control mechanism, and FIG. 8 is for explaining the configuration and operation of the reel shaft of the tape recorder mechanism. Fig. 9 is a configuration diagram showing the tape running stop detection mechanism of the tape recorder mechanism section, Fig. 1θ and Fig. 1
Figure 1 is an explanatory diagram of the operation of the tape running stop detection mechanism, Figure 12 is a side cross-sectional view showing the gear attachment mechanism of the tape recorder mechanism, and Figures 13 and 14 are diagrams of the gear attachment mechanism. 15 is a perspective view showing the spring release mechanism of the gear attachment mechanism; FIGS. 16 and 17 are exploded perspective views and side sectional views showing the locking mechanism of the cassette lid; FIG. FIG. 18 and FIG. 19 are a plan view showing a tuner pack connection mechanism and a plan view showing a modification thereof, respectively. 1 No... Cabinet, 12... Compact tape cassette, 13... Cassette lid, 14... Stop operator, 16... Play operator, 16... Record operator, 1
2...Manual reverse operator, 18...Display section, 19...Window section, 20...Operator for tape high speed running, 21° pipe work operator, 22...Main palm, 23. 24... Reel axis, 25... Motor, 2
6.27... Capstan, 28... Cassette holder, 29, 30... Pinch roller, 31, 32...
・Flywheel, 33...Belt, 34...Pulley, 35...Tape running direction switching lever, 36...
Gear, sy...Switching lever, 38...Reverse slide, 39...Switching control lever, 40-...Lock lever-14...Switch lever, 42...Leaf switch, 43...Friction Lever, 44... Drive lever, 45... Regeneration lock lever 146... Reverse function selection lever, 47... Automatic stop lever, 48...
Subchassis, 49...Support part, 50.51...
Friction member, 52... Washer, 53... Spring, 54... Lock slider, 55... Support body, 56
... Spring, 67 ... Screw, 58 ... Connection terminal part. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Figure 7 Figure 8 (a) (b) Figure 12 (a) (b) Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 (C) 8a

Claims (1)

[Claims] first and second capstans, and first and second capstans provided corresponding to the first and second capstans, respectively;
a pinch roller; first and second support means rotatably supporting the first and second pinch ropes, respectively, and movable toward and away from the capstan; the fix and the second
a movable member that is moved to a predetermined position in conjunction with the operation of the tape constant speed running operating member; The movable member has a substantially central portion rotatably supported, a ml and a second engaging portion are formed on both sides of the rotation fulcrum, and both end portions are engaged with the first and second supporting means, respectively. The switching member is moved to the first and second positions for causing the tape to run in the forward and reverse directions in conjunction with the detection operation of the tape end detection mechanism or the operation of the manual reverse operation member. '744 l and an actuating member formed with third and fourth engaging parts that are respectively engaged with the first and second engaging parts of the switching member when in the second position. , with the actuating member in the first and second positions, the switching member is moved between the contact portion between the engaging portion of the si and the third engaging portion, and the contact portion between the second engaging portion and the fourth engaging portion. The first and second pinch rollers are brought into selective contact with the first and second capstans by rotating in different directions using the contact portion with the engagement portion as a fulcrum. thing