JP3008487B2 - Tape player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The tape player of the present invention will be described in detail according to the following items.

A. Industrial application fields B. Summary of the invention C. Background art D. Problems to be solved by the invention E. Means to solve the problems F. Embodiment a. Reel stand, capstan, pinch roller, etc. [ FIG. 1,
FIGS. 2, 4, 7 to 10] b. Mode types [FIG. 1, FIG. 7, FIG. 8, FIG. 10] c. Drive system, transmission system [FIG. 1 to FIG. 4 and 6 to 12
FIG. C-1. Drive system [FIGS. 1 to 4 and FIGS. 6 to 9]
Figures, FIG. 11] c-2. Transmission system [FIGS. 1 to 4, FIG. 7 to FIG.
FIG. 12, FIG. 12] d. Head moving mechanism [FIG. 1 to FIG. 3, FIG.
Figure] d-1. Structure d-2. Movement of magnetic head and pinch roller e. Swing lever [Fig. 1, Fig. 3 to Fig. 10, Fig. 12] e-1. Swing lever for play [ FIG. 1, FIG. 3, FIG.
Figures, FIGS. 6 to 9] e-2. High-speed swing lever [FIGS. 1, 3 to 10]
Figures, Fig. 12] f. Mode switching mechanism [Figs. 1, 3 to 12] f-1. Rotation of mode switching slider and play swing lever [Figs. 1, 3 to 3] 11] f-2. Connecting lever, centering spring [Fig. 1, 3
Fig. 4, Fig. 4, Fig. 7 to Fig. 9] f-3. Slider moving means [Fig. 1, Fig. 3 to Fig. 5
Figures, FIGS. 7 to 12] f-3-a. Cam gear [teeth portion, missing tooth portion, etc.] [FIG.
FIGS. 3 to 5, FIGS. 7 to 12] f-3-b. Cam Gear [Control Cam Groove] [FIGS. 1, 3, 5, 5, 7 to 12] f-3-c. Movement of mode switching slider [FIG. 1,
FIGS. 7, 8] f-3-d. Cam gear [cam groove to be controlled, cam surface for control] [FIGS. 1, 3 to 5, FIGS. 7 to 12] 3-e. Trigger lever, electromagnetic plunger [No. 1
Figures, FIGS. 3 to 5, FIGS. 10 to 12] f-3-f. Lock and Initial Trigger at Stop Position of Cam Gear [FIG. 11] f-4. Limiting Lever [FIG. 3 to 5 and 7
FIGS. To 10 and 12] g. Mode formation and the like [FIGS. 1, 2 and 7 to 10
Figures, Fig. 13] g-1. Stop mode [Figs. 1, 2] g-2. Formation of high-speed running mode [Fig. 10] g-3. Formation of play mode and prevention of formation of fast-forward mode [FIGS. 7, 8] g-4. Transition to stop mode and prevention of tape running [FIGS. 8, 9, 13] g-4-a. Transition to stop mode g-4 -B. Prevention of tape running G. Effects of the invention (A. Industrial application field) The present invention relates to a novel tape player. For more information,
The rotation of the two reel bases is performed by a motor of one drive system regardless of a play mode in which recording or reproduction on the tape is performed and a high-speed running mode in which the tape is fast-forwarded or rewound. Transmission systems for separately transmitting the rotation of the motor to the two reel bases, a high-speed traveling oscillating gear interposed between the two transmission systems and the driving system, and the high-speed traveling oscillating gear And a friction means provided between the high-speed swing lever and the high-speed swing lever that supports the high-speed swing lever, and applies a rotational force to the high-speed swing lever in a direction corresponding to the rotation direction when the high-speed running swing gear is rotated. Prepared,
When forming the high-speed traveling mode, the rotation direction of the motor is selectively switched in the stop mode, whereby the high-speed traveling oscillating gear is moved to a position associated with one transmission system corresponding to the rotation direction of the motor. The rotation of the drive system is inputted to the reel base via the high-speed running oscillating gear and the transmission system. It is an object of the present invention to provide a novel tape player which can be prevented from being meshed with a transmission system corresponding to a rotation direction by extremely simple means.

(B. Summary of the Invention) When the tape player of the present invention is switched from the stop mode to each play mode by the mode switching means,
The control member is temporarily held at the regulation position by the other end of the trigger means together with the initial rotation operation of the cam means by the trigger means, and is moved so that the control member is held at the regulation position by further rotating the cam means by the driving means. Therefore, the mode is smoothly switched, and the control member is surely controlled to move to the regulation position.

(C. Background Art) The tape player is provided with two reel bases in which both ends of the tape are individually fixed, and two wound tape reels are separately engaged with each other and rotate integrally therewith. When the tape is run, the one of the two reel bases corresponding to the current tape running direction is rotated in the tape winding direction. In general, the rotation of the two reel bases Is performed by one drive system using a motor as a drive source, and the selective rotation of the two reel bases is interposed between the drive system and two transmission systems that separately transmit the rotation to the two reel bases. This operation is performed by linking the set swing gear with a transmission system that corresponds to the tape running direction in the operation mode.

In the tape player, usually, a play mode in which recording or reproduction is performed on the tape, a fast-forward mode in which the tape is fast-forwarded, a rewind mode in which the tape is rewound, and any of these operation modes, In some cases, the released stop mode can be selectively formed, and as the play mode, two types of play modes depending on the difference in the tape running direction can be selectively formed.

By the way, there are several methods for controlling the position of the oscillating gear. Among them, in the high-speed running mode, that is, in the mode in which the tape is fast-forwarded or rewound, one of the drive system and the two transmission systems is used. In many cases, a position control method of a oscillating gear (hereinafter, referred to as a "high-speed running oscillating gear") for selectively coordinating between the two uses friction means. , The swing lever is rotatably supported at a position coaxial with the drive system gear, and the swing gear is rotatably supported by the swing lever, and friction between the swing lever and the swing gear is provided. Means for engaging the oscillating gear with the gear of the drive system, so that when the rotational force of the gear is applied to the oscillating gear, the rotational force in the same direction as the direction of the rotational force Uses the above friction means Then, the swing gear is given to the swing lever, the swing lever is rotated in the same direction, and when the swing lever is prevented from rotating, the swing gear is rotated, and the rotation according to the rotation direction of the motor is performed. The oscillating gear is configured to be linked with one of the two transmission systems by power.

The position control of the oscillating gear for high-speed running by such a method has an advantage that the structure of the tape player does not have to be complicated because the mechanical structure for performing the control is sufficient only with the friction means.

(D. Problems to be Solved by the Invention) However, when such a method is employed for the position control of the high-speed traveling swing gear, the rotation of the motor in at least one of the fast-forward mode and the rewind mode is performed. Since the direction is the same as the rotation direction of the motor in the play mode, the swing lever (hereinafter, “high-speed swing lever”) supporting the high-speed running swing gear immediately after the formation of the play mode is started. ) Is moved to the position where the fast-forward mode or the rewind mode is formed. Therefore, in this type of conventional tape player, in the play mode, A control mechanism is provided to prevent the movement of the swing lever and release the stop when the stop mode is formed, thereby rotating the drive system to one reel base in the play mode. So as to prevent from being entered simultaneously through the two systems.

However, all of the conventional control mechanisms of this type have a problem that the number of parts is large and the structure is complicated.

(E. Means for Solving the Problems) In order to solve the above problems, the tape player of the present invention has two transmission means for separately transmitting the rotation of one driving means to two reel bases, and two transmission means. A high-speed running oscillating gear provided between the transmitting means and the driving means for transmitting the rotational force of the driving means to one of the two transmitting means; and a high-speed oscillating support for supporting the high-speed running oscillating gear. The high-speed running oscillating gear is provided between the lever and the high-speed running oscillating gear. A friction means for rotating the high-speed swing lever so as to mesh with one of the two corresponding transmission means, and a mode operated by the driving means to switch between three states of a normal play mode, a reverse play mode, and a stop mode. And replacement means,
A control member that is moved between a regulation position that regulates the rotation of the high-speed swing lever and a regulation release position that releases the regulation of the high-speed swing lever; and a control member that is provided in the mode switching unit and moves the control member. A stop mode, comprising: a cam means for controlling; and a trigger means, one end of which is urged by the urging means, which imparts an initial rotation operation to the cam means by the urging force, and temporarily holds the control member at a regulating position by the other end. When the mode is switched to each play mode by the mode switching means,
The control member is temporarily held at the regulation position by the other end of the trigger means together with the initial rotation operation of the cam means by the trigger means, and is moved so that the control member is held at the regulation position by further rotating the cam means by the driving means. Is controlled.

Therefore, in the tape player of the present invention, the control member is moved by using the biasing force of the trigger means for controlling the initial rotation of the cam means provided in the mode switching means, and finally the cam means is used. It is configured to regulate the position of the control member. Therefore, the mode switching is performed smoothly, and the control member is surely controlled to move to the regulation position.

(F. Example) Hereinafter, the tape player of the present invention will be described in detail with reference to an illustrated example.

In the illustrated embodiment, the present invention is applied to the tape player 1 in which the rotation direction of the motor in the fast-forward mode is the same as the rotation direction of the motor in the play mode.

(A. Reel stand, capstan, pinch roller, etc.)
FIG. 2, FIG. 4, FIG. 4, FIG. 7 to FIG. 10] 2 is an outer casing of the tape player 1, and 3 is a mechanical chassis fixed inside the outer casing 2.

Reference numeral 4 denotes a cassette holder (see FIG. 2) for detachably holding the tape cassette 5, and a rear end portion of the mechanical chassis 3 (a downward direction in FIG. 1 is a rear side, and an upward direction is a front side). In the figure, the leftward direction is the left direction, and the rightward direction is the right direction. In the following description, this direction is used when indicating the direction.) It is movably supported.

The cassette holder 4 protrudes downward from the rear edge of the top plate 4a in the form of a long strip in the left-right direction, the supported pieces 4b, 4b protruding downward from both left and right ends of the top plate 4a, and the top plate 4a. A cassette holding piece (not shown) projecting from a position near the left and right ends of the front side edge of the back wall 4c and the top plate 4a is integrally formed, and is directed substantially upward and forward to a cassette mounting position facing directly forward. The tape cassette 5 is moved to and from the eject position, and the loading and unloading of the tape cassette 5 to and from the cassette holder 4 is performed in a state where the cassette holder 4 is at the eject position. When the holder 4 is moved to the cassette mounting position, the tape cassette 5 is moved to the mechanical chassis 3.
It is placed on the upper surface of.

Reference numerals 6 and 6 'denote reel stands rotatably supported by the mechanical chassis 3, 7, 7' denote reel engaging shafts of the reel stands 6, 6 ', and 8, 8' denote reel engaging shafts 7, 7 '. The reel engaging shafts 7 and 7 ′ are positioned so as to protrude upward from the mechanical chassis 3.
Reference numeral 8 ′ is located below the mechanical chassis 3.

Reference numerals 9 and 9 'denote capstans, which are rotatably supported by support members 10, 10 which are arranged in the mechanical chassis 3 at a position close to the cassette holder 4 from the front and separated from each other in the left-right direction. In the play mode, at least in the play mode, the right capstan 9 (hereinafter referred to as “N-side capstan”) is rotated counterclockwise as viewed from above, and the left capstan 9 ′ is rotated. (Hereinafter referred to as “R-side capstan”) is rotated clockwise.

When the tape cassette 5 is placed on the mechanical chassis 3, two tape reels 12, 12 ′ rotatably stored in the cassette case 11 are attached to the reel bases 6, 6 ′.
Are engaged separately, and the capstans 9 and 9 'are separately inserted into two holes (not shown) formed at the front end of the cassette case 11.

Numeral 13 denotes a magnetic tape having both ends fixed to the tape reels 12, 12 ', respectively.

Reference numerals 14 and 14 'denote pinch roller arms rotatably supporting the pinch rollers 15 and 15', and support shafts 16 whose base ends are suspended at positions near the left and right ends of the top plate 4a of the cassette holder 4. The pinch rollers 15 and 15 ′ are rotatably supported by the rotary end of the tape cassette 5. When the tape cassette 5 is mounted on the tape player 1, the pinch rollers 15 and 15 ′ are rotated. The capstans 9 and 9 ′ are separately and closely opposed to each other with the magnetic tape 13 interposed therebetween.

Reference numerals 17 and 17 'denote compression springs, which are substantially scissor-shaped springs, and the coil portions 17a and 17'a of which are pinch roller arms 1
4, 14 'is supported in the form of an external fitting at the substantially cylindrical base end,
The tip of one arm 17b, 17'b is a pinch roller arm 1
A spring which is elastically contacted with the back of the pinch roller arms 14 and 14 'and which is elastically contacted with the back of the pinch roller arms 14 and 14' (hereinafter referred to as "pressed arm"). The pinch roller arms 14 and 14 'are elastically contacted from the front by being pressed by a pressing pin provided on a head pressing slider to be described later. Pivoted forward, thereby causing the pinch rollers 15, 1
5 'is pressed against the capstans 9, 9'.

(B. Types of mode) [FIG. 1, FIG. 7, FIG. 8, FIG.
Figure] The modes formed by this tape player 1 include:
There are a total of five types: two types of play modes, two types of high-speed running modes, and stop modes.

That is, the magnetic tape 13 is pulled out from the left tape reel 12 '(hereinafter, referred to as "S reel") of the two tape reels 12, 12', and is pulled out from the right tape reel 12 (hereinafter, "T reel").
Say ) Is a normal play mode (FIG. 7 shows this normal play mode) in which recording or reproduction is performed while the vehicle is traveling in the direction of winding (hereinafter referred to as "normal direction"). ), And a mode in which recording or reproduction is performed while the magnetic tape 13 is running in a direction opposite to the normal direction (hereinafter, referred to as a “reverse direction”) is a reverse play mode (FIG. 8 shows this reverse play mode). Play mode is shown.)

And, in the normal play mode, the T reel
The reel base 6 (hereinafter referred to as “T-side reel base”) with which the reel 12 is engaged is rotated in the tape winding direction, that is, counterclockwise as viewed from above, and the two pinch roller arms are used.
The right side 14 (hereinafter, referred to as an "N-side pinch roller arm") of 14 and 14 'is rotated forward and its pinch roller 15 (hereinafter, referred to as an "N-side pinch roller") is magnetic. The tape 13 is pressed to the N-side capstan 9 with the magnetic tape 13 running in the normal direction.

In the reverse play mode, the S reel 1
The reel base 6 '(hereinafter referred to as "S-side reel base") with which the 2' is engaged is rotated in the tape winding direction, that is, clockwise as viewed from above, and the left pinch roller arm. 14 '(hereinafter referred to as "R-side pinch roller arm") is rotated forward and its pinch roller 15' (hereinafter referred to as "R-side pinch roller") is placed on the R side with the magnetic tape 13 interposed therebetween. It is crimped on the capstan 9 ',
The magnetic tape 13 runs in the reverse direction.

The state in which the play mode is released is the stop mode (FIG. 1 shows this stop mode).

In the mechanical configuration, the play mode is always formed in the order of the normal play mode-reverse play mode. Therefore, the normal play mode is formed as the play mode from the stop mode, and the reverse play mode is thereafter formed. Therefore, the transition to the stop mode is always performed from the reverse play mode.

A mode in which the magnetic tape 13 runs at a high speed in the normal direction is a fast-forward mode, and a mode in which the magnetic tape 13 runs at a high speed in the reverse direction is a rewind mode (FIG. 10 shows these modes). These high-speed running modes are formed from the stop mode.
The side reel base 6 is rotated at high speed in the tape winding direction, and in the rewind mode, the S-side reel base 6 'is rotated at high speed in the tape winding direction.

(C. Driving system, transmission system) [FIGS. 1 to 4, 6 to 12] (c-1. Driving system) [FIGS. 1 to 4, 6 to 9]
FIG. 11, FIG. 11] Reference numeral 18 denotes a drive system, which includes one motor, two flywheels, a drive gear, an intermediate gear, and the like.

Reference numeral 19 denotes a motor fixed to the left end of the mechanical chassis 3, and a small-diameter drive pulley 20 is fixed to a rotating shaft 19a.

Reference numerals 21 and 21 'denote Philayl wheels. The lower end of the N-side capstan 9 is provided at the center of the right flywheel 21.
The lower end of the R-side capstan 9 'is fixed to the center of the left flywheel 21', respectively. Further, a belt winding groove 21a is formed on the outer peripheral surface of the right flywheel 21. A gear portion 21b protrudes from the upper surface,
A pulley 2 is provided on the lower surface of the left flywheel 21 '.
1'a is formed integrally.

Reference numeral 22 denotes an intermediate pulley supported on the rear end of the left end of the lower surface of the mechanical chassis 3, reference numeral 23 denotes a driving pulley 20, a belt winding groove 21a of a flywheel 21, and a pulley portion 21'a of a flywheel 21 '.
And a transmission belt wrapped around the intermediate pulley 22 in an endless manner, in which the two flywheels 21 and 21 'are wrapped so as to rotate in opposite directions.

Numeral 24 is a gear in which two large and small gears 24a and 24b coaxial with each other are integrally formed, and 25 is also an intermediate gear in which two large and small gears 25a and 25b coaxial with each other are integrally formed. The drive gear 24 and the intermediate gear 25 are separately and rotatably supported by gear support shafts 26 and 27 suspended from the mechanical chassis 3, and the center of the drive gear 24 is substantially in front of the right flywheel 21. The large gear 24a meshes with the gear portion 21b of the flywheel 21, and the intermediate gear 25 has the large gear 25a meshed with the large gear 24a of the drive gear 24 from substantially the front left.

 The above system is the driving system of the high-speed traveling mode 1.

In addition, the motor 19 is always in a mode other than the rewind mode.
The right flywheel 21 is rotated in a counterclockwise direction (hereinafter referred to as "forward rotation").

Therefore, when the motor 19 rotates forward, as viewed from above,
The N-side capstan 9 is rotated counterclockwise, the R-side capstan 9 'is rotated clockwise, the drive gear 24 is rotated clockwise, and the intermediate gear 25 is rotated counterclockwise,
When the motor 19 is rotated in the reverse direction, the intermediate gear 25 is rotated clockwise.

The small gear 24b of the drive gear 24 (hereinafter referred to as "small drive gear") is for rotating a cam gear described later.

(C-2. Transmission system) [FIGS. 1 to 4 and FIGS. 7 to 10
FIG. 12, FIG. 12] Reference numeral 28 denotes two gear portions 8 which the reel bases 6, 6 'have respectively.
A first S-side input gear 29 disposed at a substantially intermediate position between the first S-side input gear 28 and a second S-side input gear 30 meshed with the first S-side input gear 28 substantially from the front. Is the second S-side input gear
A transmission gear meshed with the gear 29 of the S-side reel base 6 'and a first S-side input gear 28-second S-side input gear 29-transmission gear 30-gear 8'. The gear transmission system is a transmission system for transmitting the rotation of the drive system 18 to the R-side reel base 6 ′ in the reverse play mode, and the second S-side input gear 29.
A transmission system for transmitting the rotation of the drive system 18 to the R-side reel base 6 'in the rewind mode is provided.

Reference numeral 31 denotes a T-side input gear disposed at a position separated rightward from the second S-side input gear 29, and 32 denotes a transmission meshed with the T-side input gear 31 and the gear portion 8 of the T-side reel base 6. Gear,
The gear transmission system of the T-side input gear 31, the transmission gear 32, and the gear unit 8 is a transmission system for transmitting the rotation of the drive system 18 to the T-side reel base 6 in the fast-forward mode.

The function of transmitting the rotation of the drive system 18 to the T-side reel base 6 in the normal play mode is performed by the gear portion 8 itself.

A play swing gear and a high-speed swing gear, which will be described later, are interposed between the transmission system and the drive system 18. In the play mode, the play swing gear is connected to the gear unit 8 or the first The rotation of the drive system 18 is input to the reel base 6 or 6 'by engaging with the S-side input gear 28 of the first embodiment. In the high-speed running mode, the high-speed swing gear is driven by the T-side input gear 31 or the second side. The rotation of the drive system 18 is input to the reel base 6 or 6 'by being engaged with the S-side input gear 29.

(D. Head Moving Mechanism) [FIGS. 1 to 3 and FIGS. 7 to 9] Reference numeral 33 denotes a head moving mechanism.
It comprises a magnetic head for recording or reading a signal to and from the magnetic tape 13, a rotatable head base supporting the magnetic head, a head pressing slider for moving the head base, a return spring, and the like.

(D-1. Structure) 34 is a magnetic head, and 35 is a head holder holding the magnetic head 34.

Reference numeral 36 denotes a head base, which has a substantially U-shaped main portion 36a that opens upward as viewed from the front-rear direction, and an arm 36b that extends horizontally rightward from the upper right end of the main portion 36a. , The arm 3
A supported portion 36c and the like having a cylindrical shape, which are vertically provided from the right end of 6b, are integrally formed, and the support shaft 16 supporting the N-side pinch roller arm 14 is inserted through the supported portion 36c. Thereby, the cassette holder 4 is supported to be rotatable substantially in the front-rear direction.

The main portion 36a is located at a position corresponding to a substantially middle portion of the cassette holder 4 in the left-right direction, and the head holder 35 is held on the main portion 36a with the tape contact surface 34a of the magnetic head 34 facing forward. Have been. Therefore,
The magnetic base 34 is rotated by rotating the head base 36.
Is moved substantially in the front-back direction.

Reference numeral 37 denotes a return spring supported by the cassette holder 4. The resilient force of the return spring 37 urges the head base 36 to rotate counterclockwise as viewed from above, and the head base 36 While not pressed forward, as shown in FIG. 2, the back wall of the cassette holder 4
4c, the magnetic head 34 is held at a position where the magnetic head 34 is slightly separated from the magnetic tape 13 while the head base 36 is at the retracted position. Further, when the play mode is formed, the head base 36 is pressed by a pressing pin provided on a head pressing slider to be described later, and FIGS.
The head base 36 is moved to the forward position shown in the drawing, and the tape contact surface 34a of the magnetic head 34 comes into contact with the magnetic tape 13 when the head base 36 comes to this forward position.

Reference numeral 38 denotes a cam portion formed at a substantially middle portion on the back surface of the lower end portion of the main portion 36a of the head base 36, and a middle portion 39 in the left-right direction when viewed in a horizontal cross section has a substantially V opening toward the rear. A portion 40a, 40b (hereinafter, referred to as a “holding surface”) continuous to both left and right ends of the intermediate portion 39 has one end having two slopes 39a, 39b (hereinafter, referred to as “covered surfaces”) of the intermediate portion 39. The pressing surface is a flat surface extending substantially in the left-right direction from the rear end.

Note that such a cam portion 38 is formed on the lower surface of the main portion 36a.

41 is a head pressing slider. The head pressing slider 41 has a long band shape in the left-right direction, and is supported by the rear end of the upper surface of the mechanical chassis 3 so as to be movable in a predetermined range in the left-right direction.

On the upper surface of the head pressing slider 41, three pressing pins 42, 43a and 43b are provided upright.
(Hereinafter, referred to as a “head pressing pin”) is located at the center of the head pressing slider 41 in the left-right direction.
a, 43b (hereinafter, referred to as “pinch roller pressing pins”) are respectively disposed at positions near both left and right ends.

41a is a relatively small engaging portion that projects forward from a position slightly leftward from the center in the left-right direction of the front side edge of the head pressing slider 41, the front end of which is bent downward. I have.

Such a head pressing slider 41 is moved by a mode switching mechanism described later, and is held at an intermediate position (hereinafter, referred to as a “stop position”) in the movement range in the stop mode, thereby forming a normal play mode. Is moved to the right end position (hereinafter, referred to as "normal position") in the movement range, and when the reverse play mode is formed, the left end position in the movement range (hereinafter, referred to as "reverse position"). )).

Then, when the cassette holder 4 is moved to the cassette mounting position, the head pressing pin 42 is relatively positioned so as to be substantially completely fitted in the intermediate portion 39 of the cam portion 38 of the head base 36 at the retracted position. (See FIG. 2), and the pinch roller pressing pins 43a and 43b
The distal ends of the pressed portions 17d and 17'd, which are inclined so as to be displaced forward as they go to the distal ends of the pressed arms 17c and 17'c of the 17 ', are respectively separately approached from behind (see FIG. 2). .

(D-2. Movement of Magnetic Head and Pinch Roller) When the head pressing slider 41 is at the stop position, the head pressing pin 42 does not press the pressed surfaces 39a and 39b against the intermediate portion 39 of the cam portion 38. As a result, the head base 36 is held in the retracted position by the elastic force of the return spring 37.

When the head pressing slider 41 is moved from this state to the normal position or the reverse position, the head base 36 is moved to the forward position. That is, the head pressing slider 41
Is moved from the stop position to the normal position, the head pressing pin 42 presses the right pressed surface 39a substantially to the right front, and then relatively rides on the right holding surface 40a, thereby Then, the head base 36 moves to the forward position and is held at that position (see FIG. 7).
Further, when the head pressing slider 41 is moved from the state toward the reverse position via the stop position, the head pressing pin 42 presses the left pressed surface 39b substantially forward to the left, and then the left side. The head base 36 moves to the forward position and is held at that position. (See FIG. 8.) When the head pressing slider 41 is returned from the normal position to the stop position, or is returned from the reverse position to the stop position, the cam portion 38 by the head pressing pin 42 is formed.
Is released, the head base 36 is returned to the retracted position by the elastic force of the return spring 37.

On the other hand, when the head pressing slider 41 moves to the normal position, the right pinch roller pressing pin 43a
The pressed portion 17d of the pressure spring 17 of the side pinch roller arm 14 is pressed substantially to the right front, whereby the N-side pinch roller arm 14 is rotated clockwise to move the pinch roller 17 to the N-side. When the head pressing slider 41 is moved to the reverse position by being pressed against the capstan 9 (see FIG. 7), the left pinch roller pressing pin 43b is pressed by the pressing spring 17 'of the R side pinch roller arm 14'. Part 17 '
d is pressed substantially to the front left, whereby the R-side pinch roller arm 14 'is rotated in the counterclockwise direction, and its pinch roller 15' is pressed against the R-side capstan 9 '(see FIG. 8).

(E. Swing lever) [Fig. 1, Fig. 3 to Fig. 10, Fig. 12
Figure] (e-1. Play Swing Lever) [(FIG. 1, FIG. 3, FIG. 4, FIG. 6 to FIG. 9) 44 is a play swing lever.

The play swing lever 44 has a flat plate shape that is long in the front-rear direction, and the rear end portion is formed wider than the remaining portion, and in the width direction of the connecting portion between the rear end portion and the remaining portion. An intermediate position is rotatably supported by the upper end of a gear support shaft 27 that supports the intermediate gear 25, and has a rear edge.
A horizontally long trapezoidal notch 46 is formed in a portion of the notch 45 except for left and right end portions 45a and 45b, and left and right end edges 46a and 46b of the notch 46 are formed.
The portion along the left and right end portions 45a and 45b of the rear end edge 45 is formed so as to form a short wall by bending the portion upward.

A gear support shaft 47 is vertically provided at the front end of the play swing lever 44, and two large and small gears 48 and 49 coaxially located on the gear support shaft 47 are rotatably supported. The large gear 48 meshes with the small gear 25b of the intermediate gear 25 from the front, and the small gear 49 (hereinafter, referred to as "playing swing gear") is located above the large gear 48, and
It is located between the gear portion 8 of the side reel base 6 and the first S-side input gear 28.

Therefore, when the motor 19 rotates forward, the large gear 48 and the small gear 49 rotate clockwise as viewed from above.

Reference numeral 50 (see FIG. 6) denotes a frictional contact comprising a friction plate 50a inserted between the upper surface of the large gear 48 and the lower surface of the small gear 49 and a coil spring 50b for pressing the small gear 49 downward. The torque input from the intermediate gear 25 to the large gear 48 is transmitted to the small gear 49 via the friction plate 50a.

The position of the play swing lever 44 is regulated by a mode switching slider, which will be described later. In the stop mode, the neutral position shown in FIG. Is held at a position intermediate between the gear portion 8 and the first S-side input gear 28, and is rotated clockwise when the normal play mode is formed, so that the play swing gear 49 The gear unit 8 is meshed with the gear unit 8, thereby rotating the T-side reel base 6 in the tape winding direction, and rotating in the counterclockwise direction when the reverse play mode is formed, thereby causing the play swing gear 49 to rotate. The first S-side input gear 28 meshes with the first S-side input gear 28, thereby rotating the S-side reel base 6 'in the tape winding direction.

(E-2. High-speed swing lever) [FIGS. 1, 3 to 10
FIG. 12] Reference numeral 51 denotes a high-speed swing lever.

The high-speed swing lever 51 includes a plate-shaped main portion 52 that is long in the front-rear direction, a cylindrical boss portion 53 that protrudes downward from the front end of the main portion 52, and a rear end of the main portion 52. A gear support shaft 54 projecting downward from the center of the portion, two stopper arms 55 projecting horizontally from a rear end edge of the main portion 52 extending in a substantially arc shape, and
56 are integrally formed of a synthetic resin having a good sliding property. When the swing lever 51 is in a long posture in the front-rear direction, one of the two stopper arms 55, 56 (hereinafter, referred to as 55) is used. The “first stopper arm” protrudes substantially to the right, and the other stopper arm 56 (hereinafter, referred to as “second stopper arm”) is directed substantially rearward from around the base of the first stopper arm 55. It is provided so as to protrude.

And such a high-speed swing lever 51 has its boss portion.
Boss part 25c with gear support shaft 27 of intermediate gear 25 inserted through 53
Is rotatably supported by the gear support shaft 27 by being inserted.

Reference numeral 57 denotes a high-speed swing gear, which is a flat gear-shaped main portion 58 and a cylindrical boss portion 59 protruding from the center of the upper surface of the main portion 58.
Are integrally formed, and the boss portion 59 is rotatably supported by the high-speed swing lever 51 by inserting the gear support shaft 54 of the high-speed swing lever 51 therethrough.

Reference numeral 60 denotes a coil spring which is externally fitted to the boss 59 of the oscillating gear 58, and is compressed between the main portion 58 of the oscillating gear 57 and the main portion 52 of the oscillating lever 51. 57 is in frictional contact with the swing lever 51 via the coil spring 60.

The high-speed swing gear 57 is a second S-side input gear.
29 between the T-side input gear 31 and the intermediate gear
It is meshed with the 25 small gears 25b from behind.

Therefore, when the motor 19 is rotated forward, the rotational force of the intermediate gear 25 rotated counterclockwise is increased by the high-speed oscillating gear 57.
Is applied to the high-speed swing lever 57, which is in frictional contact with the high-speed swing gear 57, whereby the high-speed swing lever 51 and the high-speed swing The gear 57 is integrally rotated counterclockwise, and
The high-speed swing gear 57 is rotated clockwise. Also,
When the motor 19 is rotated in the reverse direction, the rotational force of the intermediate gear 25 rotated clockwise is applied to the high-speed swing gear 57, and in this case, the high-speed swing lever 51 is rotated clockwise. Powered, whereby the high-speed swing lever
The 51 and the high-speed oscillating gear 57 are integrally rotated clockwise, and the high-speed oscillating gear 57 is rotated counterclockwise.

In the play mode, the rotation of the high-speed swing lever 51 in the counterclockwise direction is limited to a certain position by a limiting lever described later, and the high-speed swing gear 57 meshes with the T-side input gear 31. The restriction is canceled when the stop mode is established.

Thus, when the motor 19 is rotated forward from the stop mode, the high-speed oscillating lever 51 engages the high-speed oscillating gear 57 with the T-side input gear 31 (hereinafter referred to as “T-side meshing position”). ), Whereby the high-speed swing gear 57
Rotates the T-side input gear 31 in the counterclockwise direction, and rotates the T-side reel base 6 in the tape winding direction. Also, the motor
When 19 is reversed, the high-speed swing lever 51 is rotated to a position where the high-speed swing gear 57 meshes with the second S-side input gear 29, whereby the high-speed swing gear 57 is moved to the second position. Of the S-side input gear 29 in the clockwise direction to rotate the S-side reel base 6 '.
Is rotated in the tape winding direction.

(F. Mode Switching Mechanism) [FIGS. 1, 3 to 12] 61 shows a first state when forming a normal play mode and a second state when forming a reverse play mode. 3 of the third state when forming the stop mode
A mode switching mechanism for selectively taking one of two states, mainly a mode switching slider for regulating the position of the play swing lever 44, a slider moving means for moving the mode switching slider, and a mode switching slider. A coupling lever for interlocking the head pressing slider 41 with the movement, a centering spring for urging the mode switching slider and the coupling lever to move to a position in the stop mode, and a high-speed swing lever 51 in the play mode The slider moving means comprises a cam gear, the small drive gear 24b for rotating the cam gear, and rotation of the cam gear by three predetermined rotations. It consists of a trigger lever and an electromagnetic plunger for stopping and releasing the stop at the stop position. .

(F-1. Rotation of Mode Switching Slider and Swing Lever for Play) [FIGS. 1, 3 to 11] Reference numeral 62 denotes a mode switching slider.

The mode switching slider 62 has a flat plate shape that is long in the left-right direction, and a portion slightly leftward from an intermediate portion in the left-right direction is positioned so as to oppose the play swing lever 44 from behind, and is mechanically operated. It is slidably supported on the lower surface of the chassis 3 within a certain range in the left-right direction, and a substantially trapezoidal restricting portion 63 that is horizontally long from a position facing the play oscillating lever 44 on the front side edge thereof is forward. A small cylindrical control pin 64 protrudes horizontally toward the left side and is provided on the lower surface at a position shifted leftward from the right end.

62a is an engaging portion projecting downward from the left end of the front edge of the mode switching slider 62, and 62b is located below the front edge of the portion of the mode switching slider 62 close to the left end of the regulating portion 63. It is a stopper projection formed in the shape of an embossed surface.

A portion 63a (hereinafter, referred to as a "first regulating edge") along the left edge of the front edge of the regulating portion 63 and the following left oblique edge and the right edge of the front edge and the following right oblique edge. The portion 63b (hereinafter, referred to as a "second control edge") is formed in a short wall shape bent upward.

Then, the mode switching slider 62 is positioned at an intermediate position in the movement range (hereinafter, referred to as a “stop position”),
That is, in the state where the stop mode is reached, the restricting portion 63 contacts the notch 46 of the play swing lever 44 with the rear ends of the left and right side edges 46a and 46b of the notch 46 as shown in FIG. The play swing lever 44 is thus prevented from rotating, whereby the play swing lever 44 is held at the neutral position.

When the mode switching slider 62 is moved to the left from this state, first, the first restricting edge 63a presses the rear end of the left edge 46a of the notch 46 to move the play swing lever 44 clockwise. To the left end of the rear edge 45 of the notch 46
When the right end of 45a relatively rides on the front end of the first restricting edge 63a, the swinging lever 44 for play ends in the same direction, and the mode switching slider 62 moves to the normal position shown in FIG. The position, that is, the position in the normal play mode is reached, whereby the play swing gear 49 meshes with the gear portion 8 of the T-side reel base 6. Further, when the mode switching slider 62 is moved rightward through the stop position,
First, the second regulating edge 63b presses the rear end of the right edge 46b of the notch 46 to rotate the play swing lever 44 counterclockwise, and then the right end of the rear edge 45 of the notch 46 When the left end of 45b relatively rides on the front end of the second restricting edge 63b, the swinging lever 44 for play ends in the same direction, and the mode switching slider 62 is set to the reverse position shown in FIG. The position, that is, the position in the reverse play mode, is reached, whereby the play swing gear 49 meshes with the first S-side input gear 28.

When the mode switching slider 62 returns from the normal position to the stop position, the second regulating edge 63b is notched 46
When the mode switching slider 62 returns from the reverse position to the stop position, the first regulating edge 63a presses the rear end of the left edge 46a of the notch 46 by pressing the rear end of the right edge 46b. The play swing lever 44 is returned to the neutral position.

The position of the mode switching slider 62 is controlled by:
The operation is always performed in the order of stop position-normal position-reverse position-stop position, and when moving from the normal position to the reverse position, there is no stop at the stop position. Movement to the stop position 62 is always performed from the reverse position.

Thus, in the normal play mode, the gear unit 8 of the T-side reel base 6 and the drive system 18 are linked via the play swing gear 49 to rotate the T-side reel base 6 in the tape winding direction, In the reverse play mode, the transmission system and the drive system 18 from the first S-side input gear 28 are linked via the play swing gear 49, and the S-side reel base 6 'is rotated in the tape winding direction. You.

The rotation of the high-speed swing lever 51 in the clockwise direction is stopped when the second stopper arm 56 comes into contact with a stopper projection 62b formed on the mode switching slider 62 (see FIG. 10). The high-speed swing gear 57 and the second
Meshes with the S-side input gear 29 without interference of teeth, that is, without biting.

(F-2. Connection Lever, Centering Spring) [FIG. 1, FIG. 3, FIG. 4, FIG. 7 to FIG. 9] Reference numeral 65 denotes a substantially rhombus-shaped connection lever long in the front-rear direction.
The connecting lever 65 is rotatably supported on the lower surface of the mechanical chassis 3 at substantially the center thereof, and substantially U-shaped engaging notches 65a and 65b are formed at both front and rear edges thereof. A spring contact portion 65c protrudes downward from the side edge facing the direction.

The engaging portion 62a of the mode switching slider 62 is rotatably engaged with the front engaging notch 65a, and the engaging portion 41a of the head pressing slider 41 is rotatably engaged with the rear engaging notch 65b. Accordingly, the mode switching slider 62 and the head pressing slider 41 are connected via the connecting lever 65 so that their moving directions are opposite to each other, and when the mode switching slider 62 is at the stop position, the head is switched. The pressing slider 41 is held at its stop position,
When the mode switching slider 62 is moved to the normal position, the head pressing slider 41 is moved to its normal position, and when the mode switching slider 62 is moved to the reverse position, the head pressing slider 41 is moved to its reverse position. Thus, when the play mode is established, the head base 36 is moved to the forward position.

Reference numeral 66 denotes a scissor-shaped spring centering spring, which is disposed substantially to the right of the connecting lever 65 and has a coil portion 66.
a is a spring support pin 67 fixed to the lower surface of the mechanical chassis 3
The two arms 66b and 66c are fixed to the lower surface of the mechanical chassis 3 when the mode switching slider 62 is at the stop position. By elastically contacting the spring abutting member 68 so as to sandwich the spring abutting member from directions substantially opposite to each other, the members extend substantially in parallel with each other (see FIG. 1), and each end thereof has a spring formed on the connecting lever 65. This portion 65c is positioned so as to be sandwiched from directions substantially opposite to each other and to be in light contact with each other.

Therefore, when the mode switching slider 62 is moved to the left from the stop position and the connecting lever 65 is rotated in the counterclockwise direction, the two arms 66b and 66c of the centering spring 66 are provided with the spring contact portion 65c. The one arm 66b, which has been in contact from substantially the front, is pressed by the spring contact portion 65c and is separated from the spring contact member 68, so that the resilience of the one arm 66b is applied to the spring contact portion 65c.
When the mode switching slider 62 is moved rightward by the stop position, the connecting lever 65 is moved clockwise from the neutral position. And the other arm 66c of the centering spring 66 is pressed by the spring contact portion 65c and is separated from the spring contact member 68, so that the resilient force of the other arm 66c causes the connection lever 65 to return to its original state. Acts as a force to return to the neutral position.

If the mode switching slider 62 is at a position other than the stop position,
Then, the return force to the stop position by the centering spring 66 is urged via the connecting lever 65.

(F-3. Slider moving means) [Fig. 1, Fig. 3 to Fig. 5, Fig. 7 to Fig. 12] (f-3-a. Cam gear [teeth portion, missing tooth portion, etc.]) [ Figure 1,
3 to 5 and 7 to 12] 69 is a cam gear.

Reference numeral 70 denotes a main portion of the cam gear 69, which has a disk shape and whose center is rotatably supported by a support shaft 71 vertically suspended from the mechanical chassis 3, and which has a T-side reel base 6 when viewed from above. It is located almost at the rear right, and its center is a mode switching slider
It is positioned on the extension of the movement locus of the controlled pin 64 of 62.

72a, 72b and 72c are tooth portions, 74a, 74b and 74a formed so as to be arranged in the circumferential direction below the outer peripheral surface 73 of the main portion 70.
74c is a toothless portion located between each of the three tooth portions 72a, 72b and 72c, and the small drive gear 24b has a pitchi circle whose rearward pitch is substantially the left of the pitch circle of the tooth portions 72a, 72b and 72c. It is located to circumscribe from.

One of the three teeth 72a, 72b and 72c 72a (hereinafter referred to as
It is referred to as "first tooth". ) Has a length of about 120 ° at the central angle, and the cam gear 69 is positioned at the position shown in FIG.
Stop position ". ), The cam gear 69 has a counterclockwise end of the first tooth portion 72a when viewed from above.
Is located slightly counterclockwise from the position directly to the left of the center. Further, a tooth portion 72b (hereinafter, “second tooth portion”) adjacent to the first tooth portion 72a on the clockwise side.
Say ) Has a central angle of more than 110 ° and another
One of the tooth portions 72c (hereinafter, referred to as a "third tooth portion") has a length of about 40 degrees at the central angle. And the first tooth portion
The missing tooth portion 74a between the second tooth portion 72a and the third tooth portion 72c (hereinafter referred to as "first tooth portion").
Missing tooth part. " ) Has a length of less than 50 ° at the central angle, and the missing tooth portion 74b between the first tooth portion 72a and the second tooth portion 72b.
(Hereinafter referred to as "second missing tooth portion") and another missing tooth portion 74c (hereinafter referred to as "third missing tooth portion") have a central angle of about 20 °. Has been.

The cam gear 69 is prevented from rotating at three stop positions, the first stop position, the second stop position shown in FIG. 7, and the third stop position shown in FIG. In the state where it has come to the position, the end near the first tooth part 72a of the first toothless part 74a corresponds to the small drive gear 24b, and when it comes to the second stop position, the second toothless part 74b However, when the third stop position is reached, the third missing tooth portions 74c correspond to the small drive gears 24b, respectively.

When the motor 19 rotates forward, the small drive gear 24b is rotated clockwise, and when the cam gear 69 is in one of the three stop positions and an initial rotation described later with respect to the cam gear 69 is performed, Until then small drive gear 24
The tooth portion whose end on the counterclockwise direction is close to b is meshed with the small drive gear 24b, whereby the cam gear 69 is rotated in the counterclockwise direction.

Then, the cam gear 69 performed by the small drive gear 24b
Ends when the toothless portions 74a, 74b, 74c correspond to the small drive gear 24b. In this case, the three toothless portions 74a, 74b,
Since 74c has the length as described above, the cam gear 6
When 9 is rotated from the first stop position, the second toothless portion 74b is associated with the small drive gear 24b almost at the same time as reaching the second stop position. The third toothless portion 74c is associated with the small drive gear 24b substantially at the same time when the third stop position is reached when the third rotation position is reached.
When the cam gear 69 is rotated from the third stop position to a substantially intermediate position between the third stop position and the first stop position, as shown in FIG. The end of 74a near the third tooth portion 72c corresponds.

Accordingly, the rotation of the cam gear 69 from the third stop position by the small drive gear 24b is stopped when the cam gear 69 reaches a position substantially before the first stop position.

The movement of the cam gear 69 from the above position to the first stop position is performed by the controlled pin 64 of the mode switching slider 62 pressing a to-be-pressed slope formed on the cam gear 69, which will be described later.

(F-3-b. Cam gear [control cam groove]) [FIGS. 1, 3, 5, 7, and 12] 75 is a control cam formed on the upper surface of the main part 70. A groove,
The cam gear 69 extends endlessly, and a substantially half portion thereof has a substantially semicircular shape centered on a position eccentric with respect to the center of the cam gear 69, and the remaining portion is formed substantially in an L shape.

One of the two side surfaces 76, 77 of the control cam groove 75, which is closer to the center of the cam gear 69, is a cam gear 69.
When viewed at the first stop position, a portion 76a having a central angle of approximately 120 ° in a clockwise direction from a position substantially right of the center of the cam gear 69 (hereinafter referred to as “normal The pressing surface is referred to as "the pressing surface."
A portion 76b extending in an arc so as to gradually increase the distance from the center of 69 and continuing to the clockwise side end of the normal pressing surface 76a (hereinafter, referred to as "normal holding surface"). ) Extends in a gentle arc so that the distance from the center of the cam gear 69 decreases as the distance from the normal pressing surface 76a increases, and the forward portion 76c extends substantially left rearward from the normal holding surface 76b. The cam gear 69 is formed on an extending flat surface and ends substantially at the right side of the center of the cam gear 69. The other side surface 77 also has a portion corresponding to the normal pressing surface 76a and the normal holding surface 76b when viewed in a state where the cam gear 69 is at the first stop position, and extends substantially parallel thereto. A portion extending from this portion to a portion corresponding to substantially the middle of the flat surface 76c extends in a direction substantially parallel to the flat surface 76c, and a portion 77a having a central angle more than 90 ° ahead of the portion extends from this portion.
(Hereinafter referred to as a “reverse pressing surface”) extends in an arc so as to approach the center of the cam gear 69 toward the clockwise side end, and a relatively short portion 77b ahead of the reverse pressing surface 77a. (Hereinafter, referred to as a “reverse holding surface”) extends substantially rearward left, and the reverse holding surface
A portion 77c (hereinafter, referred to as a "return surface") following the 77b extends substantially toward the front left, and a portion 77d (hereinafter, referred to as a "pressed slope") from there extends to a previous position. The farther from the center of the cam gear 69, the larger part of the cam gear 69 is formed so as to extend along a gentle arc bulging toward the one side surface 76, and the flat tip portion of the cam gear 69 is It is located to the left of the center, facing forward.

(F-3-c. Movement of the mode switching slider) [FIG.
7 and 8] The mode switching slider 62 is provided in such a control cam groove 75.
The controlled pin 64 is slidably engaged on the left side of the center of the cam gear 69, and when the cam gear 69 is at the first stop position, the controlled pin 64 is rotated clockwise on the pressed slope 77d. It is located so as to lightly touch the end on the directional side from the front side,
Thus, in this state, the position regulation of the controlled pin 64 by the control cam groove 75 is released.

When the cam gear 69 is rotated from this state, the normal pressing surface 76a presses the controlled pin 64 leftward, so that the mode switching slider 62 moves toward the normal position, and the normal holding surface 76b When the substantially middle position contacts the controlled pin 64, the mode switching slider 62 reaches the normal position, and the cam gear 69 reaches the second stop position.

Then, when the cam gear 69 is rotated from this state, the controlled pin 64 is first moved rightward along the flat surface 76c, and the controlled pin 64 comes into contact with a substantially intermediate portion of the flat surface 76c. Around this time, the mode switching slider 62 reaches the stop position, and then the reverse pressing surface 77a presses the controlled pin 64 rightward, so that the mode switching slider 62 moves rightward from the stop position. When the reverse holding surface 77b contacts the controlled pin 64, the mode switching slider 62 reaches the reverse position, and the cam gear 69 reaches the third stop position.

Further, when the cam gear 69 is rotated from this state, the controlled pin 64 is first moved slightly to the left by being positioned at a corner where the reverse-time holding surface 77b and the push-back surface 77c are continuous. After that, it is returned by the push-back surface 77c to a position substantially the same as the position at the time of contact with the holding surface 77b during reverse, and then
The controlled pin 64 is brought into contact with the pressed inclined surface 77d, and at substantially the same time, the end of the first toothless portion 74a on the side of the third tooth portion 72c is opposed to the small drive gear 24b and is controlled by the small drive gear 24b. Cam gear 69
Is aborted. In this state, as shown in FIG. 9, the pressed slope 77d has a posture extending substantially to the front left, so that the controlled pin 64 is returned by the return force to the stop position biased by the mode switching slider 62. Acts on the inclined surface 77d as a force for rotating the cam gear 69 in the counterclockwise direction.
Is rotated to the first stop position.

The movement of the mode switching slider 62 is performed as described above.

(F-3-d. Cam gear [cam groove to be controlled, cam surface for control]) [FIGS. 1, 3 to 5, 7 to 12]
FIG. 78 is a controlled cam groove formed on the lower surface of the main portion 70 of the cam gear 69 so as to extend in the circumferential direction around the center of the cam gear 69 in an endless manner. Three stopper projections 7 are provided on the peripheral surface 78a farther from the center.
9, 79, 79 are projected, and these three stopper projections 79, 7
9 and 79 are positioned immediately behind the center of the cam gear 69 when the cam gear 69 comes to the three stop positions on one of the peripheral surfaces 78a.
It is provided separately in one position.

Also, at three positions of the other peripheral surface 78b of the controlled cam groove 78 which face the stopper projections 79, 79, 79, respectively,
A pressed surface 80 and a push-back surface 81 are respectively formed so as to form a substantially rectangular shape toward the stopper protrusion 79, and the push-back surface 81 is located above the pressed surface 80 where the push-back surface 81 is continuous. It is located clockwise as viewed from above.

The outer peripheral surface 73 of the main portion 70 of the cam gear 69 has an upper portion 73a serving as a cam surface (hereinafter, referred to as a "control cam surface") for controlling the position regulation of a restricting lever described later.
A cutout 73b is formed in the control cam surface 73a at a position facing left when the cam gear 69 is at the first stop position.

(F-3-e. Trigger lever, electromagnetic plunger) [First
FIG. 3, FIG. 3 to FIG. 5, and FIG. 10 to FIG. 12] 82 is a trigger lever. The main part 83 of the trigger lever 82 is substantially j-shaped when viewed from above.
A substantially triangular arm 84 protrudes substantially to the right from the middle part of the side edge facing the right front of the main part 83, and a boss is located slightly behind the middle part in the longitudinal direction of the main part 83. Part 85
However, an engagement projection 86 is provided at the tip of the arm 84 so as to project upward, and further, the front end 83a and the rear end 83b of the main part 83 are located at a higher position than the remaining part. The front end portion 83a is a spring hook portion, and the rear end portion 83b is a regulating portion that regulates the movement of a restricting lever described later.
A connection pin 87 having a substantially columnar shape is provided upright on the upper surface of the main portion 83 at a position near the spring hook portion 83a.

Reference numeral 88 denotes a support shaft vertically suspended from a position slightly forward of the cam gear 69 in the mechanical chassis 3. The support shaft 88 is inserted through a supported hole 85 a formed through the boss 85. Thus, the trigger lever 82 is rotatably supported by the mechanical chassis 3.

The engagement projection 86 of the trigger lever 82 is
Is located in the controlled cam groove 78 almost directly behind the center of the cam groove.

Reference numeral 89 denotes a tension spring, one end of which is engaged with a spring engaging pin 89a protruding from the mechanical chassis 3, and the other end of which is engaged with a spring engaging portion 83a of the trigger lever 82. A turning force in a clockwise direction as viewed from above is applied to the trigger lever 82 by the pulling force 89.

Therefore, as long as the trigger lever 82 is not being rotated in the counterclockwise direction, the engaging projection 86 is positioned on the other side of the controlled cam groove 78 as shown by a two-dot chain line in FIG. 11 (A). When the trigger lever 82 is at the non-blocking position while the trigger lever 82 is in the non-blocking position, the engagement protrusion 86 is engaged with the stopper protrusion 7.
It is located out of the rotation locus of 9, 79, 79.

Reference numeral 90 denotes an electromagnetic plunger fixed to the lower surface of the mechanical chassis 3, which includes a magnet 91, a yoke 92 to which the magnet 91 is fixed, a movable element 93 slidable in a direction in which the yoke 92 is moved away from the yoke 92, a coil 94, An elongated connecting hole 93a is formed at the end of the movable element 93 on the side opposite to the yoke 92.

Then, the connection pin 87 of the trigger lever 82 is inserted into the connection hole 93a with a margin, so that the trigger lever 82 and the mover 93 are connected.

Thus, the position of the trigger lever 82 is regulated against the pulling force of the tension spring 89 when the mover 93 is attracted to the yoke 92, and in this state, the trigger lever 82
As shown by the solid line in FIG. 11 (A), the engaging projection 86 is held at the blocking position located on the rotation trajectory of the stopper projections 79, 79, 79 of the cam gear 69, and the electromagnetic plunger 90 is moved from this state. When current is supplied to the coils 94, 94, the magnet 91 and the yoke are
The attraction force by the 92 is canceled, the attraction of the movable element 93 by the yoke 92 is released, and the trigger lever 82 is moved to the non-blocking position by the tension force of the tension spring 89.

(F-3-f. Lock at the Stop Position of the Cam Gear and Initial Trigger) [FIG. 11] The energization to the electromagnetic plunger 90 is temporarily performed when the cam gear 69 is rotated.

As described above, when the trigger lever 82 is at the blocking position, the engagement projection 86 is the stopper projection of the cam gear 69.
79, 79, 79 are located on the rotation locus, and
86 is almost directly behind the center of the cam gear 69,
When the trigger lever 82 is moved to the blocking position after the rotation of the 69 has started, the one of the stopper projections 79, 79, 79 that is closest to the engagement projection 86 at that time from the clockwise direction is the cam gear. When the stopper projection comes into contact with the engagement projection 86 almost right behind the center of the 69, the rotation of the cam gear 69 is prevented, and the position when the rotation of the cam gear 69 is so prevented is One of the three stop positions.

The prevention of rotation of the cam gear 69 at the three stop positions is performed as described above.

Then, when the electromagnetic plunger 90 is energized from the state where the cam gear 69 is at the stop position, the trigger lever 82 is rotated clockwise, whereby the engaging projection 86 is moved to the stopper projections 79, 79, 79. Cam gear because it deviates from the rotation locus
The blockage of the rotation made with respect to 69 is released, and at this time, the engagement projection 86 which is moved substantially forward is moved to a position corresponding to the stopper projection 79 as shown by a two-dot chain line in FIG. 11 (A). The cam gear 69 is slightly rotated counterclockwise by pressing the pressing surface 80 (see FIG. 11 (B)). This rotation is the initial rotation, and by this initial rotation, one of the tooth portions 72a, 72b, and 72c whose end in the counterclockwise direction has been adjacent to the small drive gear 24b so far meshes with the small drive gear 24b. Therefore, from this state, the small drive gear 24b rotates the cam gear 69 by feeding the tooth portion.

When the cam gear 69 is rotated in this manner, a push-back surface 81 that is continuous with the pressed surface 80 pressed at the time of the initial rotation is shown by a two-dot chain line in FIG. 11 (B). Then, the engaging projection 86 is pressed substantially rearward left, whereby the trigger lever 82 is returned to the blocking position, and the movable element 93 is attracted to the yoke 92.

Then, when the cam gear 69 is rotated to the next stop position, the next stopper projection 79 comes into contact with the engagement projection 86, thereby preventing the cam gear 69 from rotating at the stop position.

The prevention and release of the rotation of the cam gear 69 at the stop position, the rotation by the small drive gear 24b, and the like are performed as described above.

(F-4. Limiting lever) [FIGS. 1, 3 to 5, FIGS. 7 to 10, and 12] 95 indicates when the normal play mode is formed from the stop mode and in the play mode. Swing lever for high speed
Reference numeral 51 denotes a limit lever for preventing the T-side engagement position from being moved.

The limiting lever 95 has a main part 96 in the shape of a flat plate having a substantially non-equilateral trapezoidal shape, and a right rear end of the main part 96 supports the drive gear 24 at the upper end of the gear support shaft 26. The upper part of the cam gear 69 and the high-speed swing lever
Located between 51 and.

In addition, a substantially semicircular abutting projection 97 projects horizontally rightward from the front end of the right edge of the main portion 96, and is leftward from the front end of the narrow left edge of the main portion 96 in the front-rear width. A limiting arm 98 extending slightly rearward is projected, and a projection 99 extending leftward from a position near the right rear end is formed on the lower surface of the main portion 96.

When the rotation trajectory of the limit arm 98 is substantially in front of the T-side input gear 31, the first stopper arm of the high-speed swing lever 51 is moved.
55, so that when the high-speed swing lever 51 rotates counterclockwise, the first stopper arm 55 is moved to the limit arm 98 of the limit lever 95.
, And presses the limiting arm 98 substantially forward, whereby the limiting lever 95 is applied with a clockwise turning force as viewed from above.

The contact protrusion 97 is provided so that its rotation locus passes through the deepest rear end of the notch 73b of the control cam surface 73a of the cam gear 69 that has reached the first stop position. .

Therefore, when the cam gear 69 is at the first stop position, the rotation of the limit lever 95 in the clockwise direction as viewed from above does not cause the contact protrusion 97 to move as shown in FIG. 73a
Of the notch 73b (hereinafter, referred to as a "limit release position"), whereby the high-speed swing lever 51 rotates counterclockwise in the T-side meshing position. That is, the high-speed oscillating gear 57 is allowed up to the position where the high-speed oscillating gear 57 meshes with the T-side input gear 31. When the cam gear 69 is at a position other than the first stop position, the rotation of the limit lever 95 in the clockwise direction is controlled by the contact protrusion 97 as shown in FIG. 12B, for example. Is limited to a position (hereinafter, referred to as a “restricted position”) in contact with a portion other than the notch 73b of the cam surface 73a. The rotation is limited to a position where the high-speed oscillating gear 57 is slightly separated from the T-side input gear 31 as shown in FIG.

Thus, meshing of the high-speed swing gear 57 with the T-side input gear 31 is allowed only in a state where the cam gear 69 is at the first stop position, that is, in the stop mode.

The meshing of the high-speed oscillating gear 57 with the T-side input gear 31 is performed in a state in which the position of the high-speed oscillating lever 51 is regulated by the limit lever 95. This prevents the teeth from interfering with the meshing with the gear, that is, biting.

Further, the rear end of the restricting portion 83b of the trigger lever 82 is located substantially on the right front side of the ridge 99 provided on the restricting lever 95, and in a state where the trigger lever 82 is at the blocking position, FIG. As shown in FIG. 8, the restricting portion 83b is located at a position where the rotation of the restriction lever 95 to the restriction release position is not prevented, but when the trigger lever 82 is moved to the non-blocking position,
Since the restricting portion 83b is displaced substantially to the left, the rotation of the restricting lever 95 in this state in the clockwise direction is restricted to a position where the ridge 99 abuts on the restricting portion 83b (the twelfth position). Figure (A)
), The position of the restriction lever 95 at this time is substantially the same as the restriction position.

Therefore, when the rotation of the cam gear 69 is started, the trigger lever 82 is always moved to the non-blocking position. At this time, the clockwise rotation of the limit lever 95 is at least reached to the limit position by the trigger lever 83. Is limited to

Thus, when the rotation of the cam gear 69 is started from the stop mode, the movement of the limit lever 95 is limited to the limit position by the trigger lever 82 which is moved to the non-blocking position. Is in the limit release position, the limit lever 95 is
As a result, the high-speed oscillating gear 57 is prevented from meshing with the T-side input gear 31.

(G. Formation of mode, etc.) [FIG. 1, FIG. 2, FIG.
FIGS. 10 and 13] (g-1. Stop Mode) [FIGS. 1 and 2] In the stop mode, the cam gear 69 is prevented from rotating at the first stop position. The slider 62 is held at the stop position by the centering spring 66, and the head pressing slider 41 is held at the stop position, whereby the swing lever 44 for play is held at the neutral position and the head base 36 is held at the retracted position. The pinch rollers 15 and 15 'are held at positions separated from the capstans 9 and 9'. In this state, the notch 73b of the control cam surface 73a of the cam gear 69 faces substantially to the left, and The trigger lever 82 is located on the rotation trajectory of the contact part 97, and the trigger lever 82 is at the blocking position, whereby the limit lever 95 is allowed to move to the limit release position.

(G-2. Formation of high-speed traveling mode) [FIG. 10] When the motor 19 is rotated forward from the stop mode without energizing the electromagnetic plunger 90, the fast-forward mode is formed. That is, when the motor 19 is rotated forward, the high-speed swing lever 51 is energized in the counterclockwise direction, so that
The high-speed swing lever 51 is moved to the T-side meshing position while its first stopper arm 55 presses the limit arm 98 of the limit lever 95, thereby causing the high-speed swing lever 51 to move as shown by the solid line in FIG. The oscillating gear 57 meshes with the T-side input gear 31. As a result, the T-side reel base 6 is rotated in the tape winding direction, and the magnetic tape 13 runs at a high speed in the normal direction.

In addition, when the motor 19 is rotated backward from the stop mode without energizing the electromagnetic plunger 90, a rewind mode is formed. That is, when the motor 19 is reversed,
Since the clockwise turning force is urged to the high-speed swing lever 51, the high-speed swing lever 51 is rotated in the same direction to move the high-speed swing gear 57 to two points in FIG. As shown by the dashed line,
The second S-side input gear 29 is meshed. As a result, the S-side reel base 6 'is rotated in the tape winding direction, and the magnetic tape
13 runs at high speed in the reverse direction.

(G-3. Formation of play mode and prevention of formation of fast forward mode)
[FIGS. 7 and 8] A normal play mode is formed by energizing the electromagnetic plunger 90 from the stop mode and rotating the motor 19 forward. That is, when the electromagnetic plunger 90 is energized, the inhibition of the rotation with respect to the cam gear 69 is released and the initial rotation is performed, and the first tooth portion 72a is meshed with the small drive gear 24b, and the cam gear 69 is turned into the second gear. The rotation is stopped toward the second stop position. When the second stop position is reached, the rotation is stopped. During this time, the mode switching slider 62 is moved to the normal position, and the head pressing slider 41 is moved to the normal position. As a result, the play swing lever 44 is rotated clockwise to engage the play swing gear 49 with the gear portion 8 of the T-side reel base 6, and the T-side reel base 6 is moved in the tape winding direction. And the head base 36 is moved to the forward position to bring the magnetic head 34 into contact with the magnetic tape 13, and the N-side pinch roller 15 is pressed against the N-side capstan 9 with the magnetic tape 13 interposed therebetween, The magnetic tape 13 is a capstan 9 and a pinch roller.
The recording / reproduction is performed by the magnetic head 34 on the magnetic tape 13 which is fed at a constant speed in the normal direction and wound on the T-reel 12 by this.

When power is supplied to the electromagnetic plunger 90 from the normal play mode, a reverse play mode is formed. That is, the inhibition of the rotation of the cam gear 69 at the second stop position is released, and the second rotation of the cam gear 69 causes the second tooth portion 72b to mesh with the small drive gear 24b, thereby moving the cam gear 69 toward the third stop position. When it is moved and reaches the third stop position, the rotation is stopped. During this time, the mode switching slider 62 is moved to the reverse position via the stop position, and the head pressing slider 41 is also moved to the reverse position via the stop position. As a result, the play swing lever 44 is rotated counterclockwise to engage the play swing gear 49 with the first S-side input gear 28 to move the S-side reel base 6 'in the tape winding direction. While rotating, the head base 36 is once returned to the retracted position and then moved again to the advanced position to bring the magnetic head 34 into contact with the magnetic tape 13,
Also, the R-side pinch roller 15 '
The magnetic tape 13 is pressed against the side capstan 9 'and sent at a constant speed in the reverse direction by the capstan 9' and the pinch roller 15 ', and is wound on the S reel 12' and travels in this manner. Recording or reproduction is performed on the magnetic tape 13 by the magnetic head 34.

In such a play mode, when the normal play mode is formed from the stop mode and when the mode is shifted from the normal play mode to the reverse play mode, the movement of the limit lever 95 from the restricted position to the forward position is performed. That is, the movement to the restriction release position is caused by the control cam surface 73a of the cam gear 69 or the regulating portion 8 of the trigger lever 82.
3b, the high-speed swinging lever 51 is prevented from moving by the limit lever 95 just before the T-side meshing position, even if the high-speed swing lever 51 is given a rotating force in the counterclockwise direction by the forward rotation of the motor 19. You.

This prevents the fast forward mode from being formed in the play mode.

(G-4. Transition to stop mode and prevention of tape running)
[FIGS. 8, 9 and 13] (g-4-a. Transition to Stop Mode) When the electromagnetic plunger 90 is energized from the reverse play mode, the stop mode is formed. That is, when the electromagnetic plunger 90 is energized, the inhibition of the rotation with respect to the cam gear 69 is released, and the third rotation engages the third tooth portion 72c with the small drive gear 24b to move the cam gear 69 toward the first stop position. When the pinch roller 69 reaches a position approximately halfway between the first stop position and the third stop position, the third tooth portion 73c is disengaged from the small drive gear 24b and the cam gear 69 by the drive system 18 is rotated. Is stopped, and the power supply to the motor 19 is stopped almost simultaneously. At substantially the same time, the controlled pin 64 of the mode switching slider 62 comes into contact with the pressed inclined surface 77d of the control cam groove 75 of the cam gear 69 and presses it substantially rearward left. Is rotated to the first stop position.

Thus, the mode switching slider 62 is returned to the stop position, and the head pressing slider 41 is returned to the stop position, whereby the play swing lever 44 is returned to the neutral position, and the head base 36 is returned to the retracted position. The R-side pinch roller 15 'is separated from the R-side capstan 9'.

(G-4-b. Prevention of Tape Running) As described above, when the transition from the reverse play mode to the stop mode is performed, energization of the motor 19 is performed by switching the cam gear 69 between the first stop position and the third stop position. Since the motor 19 is cut off when it comes to about the middle, the inertia of the previous rotation of the motor 19 disappears at least before the cam gear 69 reaches the first stop position, so that the drive system 18
The rotation of the oscillating gears 49 and 57 and the urging of the clockwise rotation of the high-speed oscillating lever 51 by the cam gear 69
It disappears when it reaches a position far before the stop position of.

Then, when the power supply to the motor 19 is stopped, as shown in FIG. 9, the contact protrusion 97 of the restriction lever 95 is slightly counterclockwise separated from the notch 73b of the control cam surface 73a. The cam gear 69 reaches the first stop position after the rotation of the high-speed swing lever 51 in the counterclockwise direction has disappeared.

When the cam gear 69 comes from the third stop position to the first stop position and the notch 73b of the control cam surface 73a faces the contact protrusion 97 of the limit lever 95, the high-speed swing lever 51
Can be turned to the T-side meshing position, but at this point, since the turning power of the high-speed swing lever 51 in the counterclockwise direction has already disappeared, the high-speed swing lever 51 It is not moved to the T-side meshing position, so that the fast-forward mode is not formed simultaneously with the completion of the formation of the stop mode.

Further, the rotation of the motor 19 when the mode shifts from the reverse play mode to the stop mode is stopped at the timing described above, that is, at a timing considerably earlier than the time when the formation of the stop mode is completed. At the same time, overrun of the magnetic tape 13 can be considerably suppressed as compared with the case where the rotation of the motor is stopped.

(G. Effects of the Invention) As is apparent from the above description, the tape player of the present invention includes two transmission means for separately transmitting the rotation of one driving means to two reel bases, and two transmission means. A high-speed running oscillating gear that is provided between the driving unit and transmits the rotational force of the driving unit to one of the two transmitting units; a high-speed oscillating lever that supports the high-speed running oscillating gear; The high-speed running oscillating gear is provided between the high-speed running oscillating gear and the high-speed running oscillating lever. Friction means for rotating the high-speed swing lever so as to mesh with one of the two transmission means, and mode switching means which is operated by the driving means and switches between three states of a normal play mode, a reverse play mode, and a stop mode. A control member that is moved between a regulation position that regulates rotation of the high-speed swing lever and a regulation release position that releases regulation of the high-speed swing lever, and a movement of the control member that is provided in the mode switching unit. And a trigger means that has one end urged by the urging means, applies the initial rotation operation to the cam means by the urging force, and temporarily holds the control member at the regulating position by the other end. When the mode is switched from the mode to each play mode by the mode switching unit, the control member is temporarily held at the regulation position by the other end of the trigger unit together with the initial rotation operation of the cam unit by the trigger unit, and the cam unit is further rotated by the driving unit. Thus, the movement of the control member is controlled so as to be held at the regulation position.

Therefore, in the tape player of the present invention, the control member is moved by using the biasing force of the trigger means for controlling the initial rotation of the cam means provided in the mode switching means, and finally the cam means is used. It is configured to regulate the position of the control member. Therefore, the mode switching is performed smoothly, and the control member is surely controlled to move to the regulation position.

In the above-described embodiment, the cam gear of the mode switching means, that is, the cam gear for moving the moving member that realizes the three states selectively adopted by the mode switching means, is provided with the permission of the control member to the restriction release position. And a cam means for preventing the rotation of the high-speed swing lever from being engaged with one transmission system in the play mode. Since only one member is required, the structure of this type of tape player can be further simplified.

The structure or shape of each member, each part thereof, and various means shown in the examples are merely examples of the embodiment of the present invention, and the present invention is not limited thereto. The technical scope should not be construed as limiting. In particular, the cam means may be an independent member, and the friction means and the mode switching means may be of any type provided that they have the necessary functions.

[Brief description of the drawings]

The drawings show an embodiment of the tape player according to the present invention. FIG. 1 is a plan view mainly showing a portion below a mechanical chassis, and FIG. 2 is a partially cutaway view. FIG. 3 is an exploded perspective view of a main part viewed from above, FIG. 4 is an exploded perspective view of a main part viewed from below, and FIG. 5 is an enlarged sectional view taken along line VV in FIG. 6, FIG. 6 is an enlarged sectional view taken along the line VI-VI of FIG. 1, FIG. 7 is a partially cutaway plan view of a main part in a normal play mode, and FIG. 8 is a part of a main part in a reverse play mode. Cutaway plan view, ninth
The figure is a partially cutaway plan view of the main part when shifting from the reverse play mode to the stop mode, FIG. 10 is a plan view of the main part in the high-speed running mode, and FIG. 11 shows the initial operation when the cam gear is rotated. FIG. 12 is an enlarged horizontal cross-sectional view of the main part over time from (A) to (B). FIG. 12 shows the state change of the main part when shifting from the stop mode to the normal play mode (A).
(A) is a plan view of a main part of the cam gear with a part cut away, (B) is a plan view of the main part, and FIG. FIG. 7 is a time chart showing a change in the position of some members corresponding to the teeth and the control cam grooves. DESCRIPTION OF SYMBOLS 1 ... tape player, 6 ... reel base, 6 '... reel base, 18 ... drive means, 19 ... motor, 28, 29, 30 ...
Transmission means 31, 32 Transmission means 51 High-speed swing lever 57 High-speed running swing gear 60 Friction means 61 Mode switching means 73a 73b Cam means , 82
...... Trigger means, 89 urge means, 95 control member

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 15/10 G11B 15/44

Claims (1)

(57) [Claims] 1. Two transmission means for separately transmitting the rotation of one driving means to two reel bases, and provided between the two transmission means and the driving means,
A high-speed running oscillating gear for transmitting the rotational force of the driving means to one of the two transmitting means, a high-speed oscillating lever for supporting the high-speed running oscillating gear, and the high-speed running oscillating gear; The high-speed driving oscillating gear is provided between the high-speed driving oscillating lever and the high-speed driving oscillating gear. Friction means for rotating the high-speed swing lever so as to mesh with one of them; mode switching means operated by the driving means to switch between three states of a normal play mode, a reverse play mode, and a stop mode; A control member that is moved between a regulation position that regulates rotation of the swing lever and a regulation release position that releases regulation of the high-speed swing lever; A cam means for controlling the movement of the member, and a trigger, one end of which is urged by the urging means, for applying an initial rotation operation to the cam means by the urging force and for temporarily holding the control member at the regulating position by the other end. When the mode is switched from the stop mode to the play modes by the mode switching means, the control member is regulated by the other end of the trigger means together with the initial rotation of the cam means by the trigger means. The tape player is temporarily held at a position, and is controlled to move so that the control member is held at the regulation position by further rotating the cam means by the driving means.