JPH10116457A - Tape cassette recorder and/or reproducer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable cassette to be taken out even in the case of a power failure, by providing an ejection blocking means blocking the ejecting operation of an ejection lever during a head is moved in the direction in which the head is brought into contact with a magnetic tape. SOLUTION: In an ejecting operation from a reverse reproduction mode, an operation rotating a trigger lever 42 clockwise is added when compared with an ejecting operation from a reverse stop mode. As a result, a force of not less than that at the time of the ejecting operation from reverse stop mode is required for the pushing in of the ejection lever 101 to the left side. That is, an operating feeling is made heavier. Thus, an erroneous operation is prevented by making the operating feeling at the time of performing the ejecting operation from a reproduction state heavier in this manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a novel tape cassette recording and / or reproducing apparatus. More specifically, the present invention relates to a technique that enables a tape cassette to be taken out even if a battery is consumed or a power failure occurs during recording or reproduction, without waiting for battery replacement or elimination of the power failure.

[0002]

2. Description of the Related Art In some tape cassette recording and / or reproducing apparatuses, an operation of an operation member is electronically detected, and each mode is formed based on the detection.

[0003] Such a tape cassette recording and / or reproducing apparatus has the advantage that the operational feeling is light.

[0004]

However, in the above-mentioned conventional tape cassette recording and / or reproducing apparatus, if the battery is consumed or a power failure occurs during reproduction or recording, the battery is not charged. There is a problem that the tape cassette cannot be removed unless power is supplied again after the power supply is replaced or the power failure is eliminated.

That is, the head is in contact with the magnetic tape during reproduction or recording, and if the tape cassette is removed in such a state, the magnetic tape and the head are damaged. Therefore, it is impossible to take out the tape cassette unless the power is supplied again, the stop mode is set, and the head is separated from the tape cassette.

However, it is extremely inconvenient that the tape cassette cannot be removed until the battery is replaced or the power failure is resolved, but it is extremely inconvenient. There is a problem that an accident occurs that the head is damaged or the head is damaged.

Therefore, the present invention has been made so that the tape cassette can be taken out even when the power supply is cut off during recording or reproduction due to a battery exhaustion or a power failure. Make it an issue.

[0008]

In order to solve the above-mentioned problems, a tape cassette recording and / or reproducing apparatus according to the present invention uses an eject lever and a recording and / or reproducing head by ejecting the eject lever. A head retreating means for separating the head from the tape; and an eject preventing means for preventing an ejecting operation of the eject lever while the head moves in a direction in which the head comes into contact with the magnetic tape.

Therefore, the tape cassette recording and / or
Alternatively, in a reproducing apparatus, the tape cassette can be taken out except when the head is moving to the recording / reproducing position.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a tape cassette recording and / or reproducing apparatus according to an embodiment of the present invention.

In the illustrated embodiment, the present invention is applied to a portable tape player, that is, a reproduction-only machine.

The tape player 1 has a mechanical chassis 2.

First, the drive system will be described.

In this specification, when indicating a direction,
In FIG. 4, the paper side is described as up, the paper back side as down, the right side as right, the left side as left, the lower side as front, and the upper side as back.

The two reel bases 3 are located at right and left positions substantially at the center of the upper surface of the mechanical chassis 2 in the front-rear direction.
F, 3R are rotatably supported, and gear portions 4F, 4R provided at respective base ends are located on the lower surface side of the mechanical chassis 2. And the gear part 4 of the reel base 3F
F is one of the relay gears 5a and 5b meshing with each other.
b meshes, and the relay gear 6 meshes with the gear portion 4R of the reel base 4R.

A clutch 7 is rotatably supported at a position between the relay gears 5a and 6. The clutch unit 7 includes a main gear 8 and a magnet gear 9. The main gear 8 is provided with a gear portion 11 formed by outsert molding of a synthetic resin on a peripheral portion of a disk 10 made of a magnetic material. The magnet gear 9 is entirely formed of a magnet. A clutch plate 12 having a circular shape sized to be fitted inside the upper surface of the clutch plate 12 and a gear portion 13 projecting from the center of the upper surface of the clutch plate 12 are integrally formed. The main gear 8 and the magnet gear 9 are rotatably supported by the mechanical chassis 2 while being coaxially stacked.

An NR switching lever 14 is rotatably supported on the lower surface of the mechanical chassis 2 coaxially with the clutch unit 7 and above the clutch unit 7. NR switching lever 14
Is formed with a trapezoidal notch at the front edge thereof, and pressed pieces 14F and 14R are provided upright on both right and left side edges of the notch. An NR switching gear 15 is rotatably supported on the lower surface of the rear end of the NR switching lever 14. NR switching gear 1
Reference numeral 5 denotes a large gear 15a and a small gear 15b formed integrally, and the large gear 15a is meshed with the gear 13 of the magnet gear 9 of the clutch unit 7.

A motor 16 is fixed at the left end of the lower surface of the mechanical chassis 2 at a substantially central position in the front-rear direction, and a pulley 16a is fixed to a rotating shaft protruding from the lower surface.

A tension lever 17 is rotatably supported at the front end of the left end of the lower surface of the mechanical chassis 2. The tension lever 17 is a centering part 18 which forms the rear half.
And a pulley supporting portion 19 serving as a front half portion are integrally formed, and a substantially central portion of the centering portion 18 is rotatably supported by the mechanical chassis 2. Abutting portions 18a and 18b are respectively provided at the rear end and the front end of the centering portion 18, and spring engaging pieces 18 formed at the lower end thereof are provided.
A tension coil spring 20 is stretched between c and the mechanical chassis 2, whereby the clockwise turning force is urged to the tension lever 17 as viewed from above. The tension pulley 2 is provided on the lower surface side of the pulley support 19.
1 is rotatably supported.

Flywheels 22 and 23 each having a groove for hanging a belt on the peripheral surface are rotatably supported at positions near the left and right sides of the front end of the lower surface of the mechanical chassis 2, and the upper surface of the right flywheel 23 is provided on the upper surface of the right flywheel 23. The gear part 24 is formed integrally. The pulley 16a of the motor 16
A drive belt 25 is stretched over the tension pulley 21 and the flywheels 22 and 23.

A drive gear 26 is rotatably supported on the lower surface of the mechanical chassis 2 between the flywheel 23 and the clutch unit 7. The drive gear 26 is formed by integrally forming a large gear 26a and a small gear 26b, and the large gear 26a is meshed with the gear 24 of the flywheel 23 and the main gear 8 of the clutch 7.

When the motor 16 is driven, the flywheel 23 rotates via the drive belt 25, and the drive gear 26 meshed with the gear 24 and the clutch gear meshed with the drive gear 26. 7, the main gear 8 rotates,
The viscosity acting between the disk 10 and the clutch plate 12 of the magnet gear 9 causes the magnet gear 9 to rotate, and further causes the NR switching gear 15 meshing with the gear portion 11 of the magnet gear 9 to rotate.

Next, a mode forming system for forming each mode such as a stop mode, a normal reproduction mode, a reverse reproduction mode, and an AMS mode will be described.

The cam gear 2 is at the center of the mode forming system.
7

The cam gear 27 is rotatably supported at a substantially central portion of the lower surface of the mechanical chassis 2 near the right end in the front-rear direction. The periphery of the cam gear 27 is a gear 28
The gear portion 28 is formed with three missing tooth portions 29a, 29b, and 29c with gear teeth missing at appropriate intervals.

On the lower surface of the cam gear 27, a peripheral wall 30
Are formed, and three stop surfaces 31a, 31b, 31c extending in the center direction from the inner surface of the peripheral wall 30 and facing counterclockwise as viewed from above are formed. The center-side ends of the stop surfaces 31a, 31b, 31c are connected to the inner surface of the outer peripheral wall 30 by inclined surfaces. Stop surface 31a
Is located at a position slightly clockwise from the toothless portion 29b, the stop surface 31b is at a position corresponding to the clockwise end of the toothless portion 29c, and the stop surface 31c is
b are formed at positions slightly separated in the counterclockwise direction from b.

A projection 32 having the same height as the peripheral wall 30 is formed at the center of the lower surface of the cam gear 27.
The return slopes 33a, 33b, 33c are formed on the outer peripheral surface of the outer peripheral surface 2 toward the outer periphery as going clockwise. The outer peripheral surface of the portion other than the return slopes 33a, 33b, 33c is the inner surface of the peripheral wall 30, the stop surfaces 31a, 31b, 3
There is an appropriate distance from 1c and the following inclined surface. The return slope 33a is formed at a position corresponding to the end of the slope following the stop face 31a.
Is formed at a position corresponding to a substantially intermediate position between the stop surfaces 31b and 31c, the return slope 33c is formed at a position corresponding to the end of the slope following the stop surface 31c,
The return slopes 33a, 33b, 33c immediately return to the center from the end.

An initial biasing surface 32a is formed on the outer peripheral surface of the protrusion 32 at a position facing the stop surface 31a as a slope that is displaced toward the center as it goes clockwise.

A peripheral wall 34 is formed at the peripheral edge of the upper surface of the cam gear 27, and a cutout 34a is formed at a position substantially corresponding to the toothless portion 29b of the peripheral wall 34.

On the inner side of the peripheral wall 34, three projections 35a, 35b, 35c having the same height as the peripheral wall 34 are formed.

On the surface on the center side of the projection 35a, there is provided a tension surface 36a which is displaced toward the center side in the clockwise direction.
The first working surface 36b, which is displaced in the outer circumferential direction as it goes clockwise in succession to the clockwise end of the pulling surface 36a, is connected to the clockwise side end of the first working surface 36b. And moving clockwise, the first working surface 3
Second working surface 3 displaced in the outer circumferential direction at an angle stronger than 6b
6c are respectively formed. The outer peripheral surface 37 of the projection 35a is a blocking surface, and the toothless portion 29 of the blocking surface 37 is formed.
blocking surface 37 at a position slightly offset clockwise with respect to b.
An allowance portion 38, which is a surface displaced further toward the center side, is formed.

On the outer peripheral surface of the protruding portion 35b, an extruding surface 39a which is displaced to the outer peripheral side in the clockwise direction is continuous with the clockwise end of the extruding surface 39a in the clockwise direction. An operation surface 39b displaced toward the center side is formed. In addition, a blocking protrusion 40 is provided upright on the upper surface of the protruding portion 35b.
Is the blocking surface.

The outer peripheral surface 41 of the projection 35c is a blocking surface.

A trigger lever 42 is rotatably supported at a substantially intermediate portion of the lower surface of the mechanical chassis 2 at a position slightly behind the cam gear 27. A torsion coil spring 44 is bridged between a portion of the trigger lever 42 behind the rotation fulcrum 42a and a spring hook piece 43 cut and raised in the mechanical chassis 2, whereby the trigger lever 42 is viewed from above. The clockwise turning power is energized. The coil portion of the torsion coil spring 44 is externally supported by a spring support piece 45 cut and raised in the mechanical chassis 2.

A projection 46 is provided on the upper surface of the front end of the trigger lever 42. The projection 46 is located between the peripheral wall 30 of the cam gear 27 and the projection 32. A pressing projection 47 is provided on the upper surface of a portion near the rear end of the trigger lever 42, and a right edge 48 near the front end is a pressed portion.

A plunger 49 is fixed at a position near the rear end on the right side of the lower surface of the mechanical chassis 2, and a working piece 49a of the plunger 49 is attracted when not excited, and projects rightward when excited. It is supposed to. The rear end of the trigger lever 42 is rotatably connected to the right end of the action piece 49a of the plunger 49.

An FR lever 50, which is long in the left-right direction, is rotatably supported at a portion 50a on the right side from the center of the FR lever 50 on the lower surface of the mechanical chassis 2 slightly to the left of the rotation fulcrum 42a of the trigger lever 42. The coil portion is located between the spring hooking piece 43 and the spring hooking piece 43 formed at a position slightly leftward from the rotation fulcrum 50a of the FR lever 50.
A torsion coil spring 53 supported by a spring supporting piece 52 formed behind the spring hooking piece 51 of the R lever 50 is bridged, thereby biasing the FR lever 50 to rotate counterclockwise. Have been.

At the rear edge of the right end of the FR lever 50, a pressed portion 54 having a substantially rectangular shape is vertically provided. The right end edge of the FR lever 50 is slightly spaced back and forth between the holding pieces 5.
5, 55 are vertically provided. Further, a controlled projection 56 is vertically provided at the front end of the right end of the FR lever 50. The controlled projection 56 faces a portion of the upper surface of the cam gear 27 near the periphery.

The left end of the FR lever 50 has a substantially convex hole 57 extending in the left-right direction and having a central portion bulging rearward.
A wall 58 is vertically provided at a position corresponding to the center of the convex hole 57 on the rear edge, and a wedge-shaped control projection 58a is formed on the front surface of the wall 58. A cutout 59 is formed at a position corresponding to the center of the hole 57 and is open at the front edge.

The FR swing lever 60 is supported at the left end of the FR lever 50. The FR rocking lever 60 is slightly longer in the front-rear direction, and has an engagement protrusion 60a protruding from its front end.
Are projected upward, and the engagement projection 60a is
Is slidably engaged in the front-rear direction from below. A shaft pin 61 is fixed to the rear end of the FR rocking lever 60, and the opening edge of the convex hole 57 of the FR lever 50 is vertically sandwiched between the head 61 a of the shaft pin 61 and the FR rocking lever 60. As a result, the FR rocking lever 60 is connected to the engaging protrusion 60a and the notch 5 in the range of the convex hole 57.
9 is supported by the FR lever 50 so as to be able to swing left and right with the position of engagement with the swing lever 9 as a swing support point. Then, the shaft pin 6
A shaft portion 61b protruding downward from the first FR swing lever 60
The FR gear 62 is rotatably supported.

When the plunger 49 is not energized and the controlled projection 56 of the FR lever 50 is located in the notch 34a of the upper peripheral wall 34 of the cam gear 27, the FR lever Numeral 50 is located at the counterclockwise end of the rotation range by the rotating power of the torsion coil spring 53. In this state, the FR gear 62 meshes with the gear 11 of the main gear 8 of the clutch 7, As a result, the FR rocking lever 60 moves slightly backward to move the head 61 of the shaft pin 61.
“a” is located at a portion bulging rearward of the convex hole 57, and the FR gear 62 is engaged with the control projection 58 of the FR lever 50.

When the main gear 8 of the clutch section 7 rotates counterclockwise, the FR gear 6 meshing with the main gear 8 rotates.
2 receives the rotational force in the clockwise direction, and the FR gear 62
By engaging the control projection 58 of the R lever 50, the FR swing lever 60 rotates counterclockwise, and the FR gear 62 meshes with the relay gear 6a, and the relay gear 6a is moved counterclockwise. To rotate. Thereby, the reel base 4R is rotated at a high speed in the rewind direction. Conversely, when the main gear 8 rotates clockwise, the FR gear 62 receives a rotational force in the counterclockwise direction, the FR swing lever 60 rotates clockwise, and the FR gear 62 rotates the relay gear 5b. As a result, the reel base 4F is rotated at a high speed in the fast-forward direction.

When the plunger 49 is excited, the trigger lever 42 is rotated clockwise as viewed from above,
As a result, the pressing projection 47 of the trigger lever 42 becomes F
The pressed portion 54 of the R lever 50 is pressed right forward, whereby the FR lever 50 rotates clockwise against the spring force of the torsion coil spring 53. Thereby, the engagement of the FR gear 62 with the gear portion 11 of the main gear 8 of the clutch portion 7 is released. When the cam gear 27 rotates counterclockwise, the controlled projection 56 of the FR lever 50 comes into sliding contact with the inner peripheral surface of the peripheral wall 34 on the upper surface side of the cam gear 27, whereby the FR lever 50 rotates clockwise. It is held in a state rotated in the direction.

An NR slider 63 long in the left-right direction is slidably supported in the left-right direction at the center of the lower surface of the mechanical chassis 2 in the front-rear direction. At the left end of the NR slider 63, two abutting pieces 64a, 64b are separated from each other back and forth.
The front abutment piece 64b is located slightly to the left of the rear abutment piece 64a. The rear abutment piece 64a is opposed to the rear abutment portion 18a of the tension lever 17 from the right side.
4b is opposed to the front abutting portion 18b of the tension lever 17 from the left side. Then, in a state where no other force is applied to the NR slider 63, the respective abutting portions 18a and 18b of the tension lever 17 abut against the respective abutting pieces 64a and 64b of the NR slider 63, respectively.
As a result, the NR slider 63 is maintained in a neutral state.

At the right end of the NR slider 63, a controlled projection 65 is vertically provided. The controlled projection 65 is located inside the peripheral wall 34 so as to face the upper surface of the cam gear 27. At the approximate center of the rear edge of the NR slider 63, a projection 66 is formed which projects rearward in a trapezoidal shape.
6 from the left and right side edges to the rear edge.
6R, the pressing piece 66F faces the pressed piece 14F on the left side of the NR switching lever 14 from the right side, and the pressing piece 66R faces the pressed piece 14R from the left side.
Further, the two pressing pins 67a and 67 are separated from each other at a position near the front edge at a substantially central portion of the lower surface of the NR slider 63.
b is erected.

A head base 68 is slidably supported in the front-rear direction on the lower end of the mechanical chassis 2 at the front end at the center in the left-right direction. Head support portions 69, 6 protruding upward from both left and right ends of the front end of the head base 68.
Numeral 9 protrudes to the upper surface side of the mechanical chassis 2 through insertion holes 70 formed in the mechanical chassis 2, and the magnetic head 71 is supported on the upper surface side of the mechanical chassis 2 by the head support portions 69. Then, a tension coil spring 73 is stretched between a spring hooking piece 68a hanging substantially at the center of the head base 68 and a spring hooking piece 72 hanging at the center of the front edge of the mechanical chassis 2. The head base 68 is urged forward by a moving force.

An AMS position regulating piece 74 is vertically provided at a position near the right end of the position near the front end of the head base 68. Pressed pieces 75a, 75b are provided vertically at left and right sides of a substantially central portion in the front-rear direction of the head base 68, and engagement pieces 76a, 7 are provided at left and right sides near the rear end.
6b is vertically provided.

The relay levers 77N and 77R are rotatably supported on both sides of the rear end of the head base 68 on the lower surface of the mechanical chassis 2.

Each of the relay levers 77N and 77R has a pressed arm 7 projecting rearward from its rotation fulcrum 77Na or 77Ra.
8N and 78R, and pressed pieces 78Na and 78Ra are erected on the right edge of the rear end of the pressed arm 78N and the left edge of the rear end of the pressed arm 78R, respectively. Also, engaging arms 79N and 79R are provided to project forward from a position slightly to the right of the pivot fulcrum 77Na of the relay lever 77N and a position slightly to the left of the pivot fulcrum 77Ra of the relay lever 77R. An engagement piece 79Na protruding leftward from the front end of the engagement arm 79N and an engagement piece 79Ra protruding rightward from the front end of the engagement arm 79R are formed. Further, the pressing arms 80N and 80N projecting rightward from the relay lever 77N and projecting leftward from the relay lever 77R.
R are formed, and pressing pieces 80Na, 80R are formed at the portions from the rear edge to the front edge of the distal ends of these pressing arms 80N, 80R.
a is vertically installed. The bases of the engagement arms 79N and 79R are bent in a crank shape when viewed from the side.
A portion ahead of the base end portion is located below other portions of the relay levers 77N and 77R, and portions 79Nb and 79Rb extending up and down of the base end portion are spring hook portions.

The head moving sliders 81N and 81R are located on the left and right sides of the lower surface of the mechanical chassis 2 where the head base 68 and the relay levers 77N and 77R are disposed.
Are movably supported in the front-rear direction.

A pressed arm 82N protruding leftward from the rear end of the head moving slider 81N is formed with a pressed arm 82R protruding rightward from the rear end of the head moving slider 81R. Pressed pieces 82Na and 82Ra are vertically provided at the front edges of the distal ends of 82N and 82R. Further, a pressing arm 83N protruding leftward from a portion near the front end of the head moving slider 81N and a pressing arm 83R protruding rightward from a portion near the front end of the head moving slider 81R are formed. Further, a pinch pressing arm 84N is moved from the front end of the head moving slider 81N.
Are protruded to the right, a pinch pressing arm 84R is protruded to the left from the front end of the head moving slider 81R, and a pinch pressing piece 84N is provided at the tip of each of the pinch pressing arms 84N and 84R.
a, 84Ra project upward. The pinch pressing pieces 84Na, 84Ra protrude toward the upper surface of the mechanical chassis 2 through cutout holes 85, 85 formed in the mechanical chassis 2. Furthermore, the head moving slider 81
N and 81R have spring hook pieces 86N and 86R almost at the center.
Is hanging.

The coil portion of the torsion coil spring 87N is supported by a spring hook piece 88 cut and raised in the mechanical chassis 2, and one arm 87Na elastically contacts the spring hook portion 79Nb of the relay lever 77N from the right. The other arm 87N
b is elastically contacted from behind with the spring hooking piece 86N of the head moving slider 81N. Thereby, the relay lever 77N
Is turned clockwise when viewed from above,
A forward moving force is applied to the head moving slider 81N.

The coil portion of the torsion coil spring 87R is supported by a spring hook pin 89 which is suspended from the mechanical chassis 2,
One arm 87Ra elastically contacts the spring hooking portion 79Rb of the relay lever 77R from the left, and the other arm 87Rb elastically contacts the spring hooking piece 86R of the head moving slider 81R from behind. As a result, the relay lever 77R is urged to rotate counterclockwise when viewed from above, and the head moving slider 81R is urged to move forward.

At the position near the front edge of the upper surface of the mechanical chassis 2, pinch arms 90N and 90R are rotatably supported at right and left distances. The right end of the pinch arm 90N is rotatably supported by a shaft 91N, and the pinch roller 92N is rotatably supported by the left end, which is a free end. The pinch arm 90N is energized by a torsion coil spring 93N whose coil portion is supported by the shaft 91N in a counterclockwise direction as viewed from above. Also, one arm 93Na of the torsion coil spring 93N
Is a pinch pressing piece 84 of the head moving slider 81N.
Na is engaged with a notch 84Nb formed to open upward. The pinch arm 90R has a left end rotatably supported by a shaft 91R, and a pinch roller 92R rotatably supported at a right end, which is a free end. The pinch arm 90R is provided with a coil portion corresponding to the shaft 91R.
The torsional coil spring 93 </ b> R is urged to rotate clockwise as viewed from above. Also,
One arm 93Ra of the torsion coil spring 93R is engaged with a notch 84Rb formed to open upward in the pinch pressing piece 84Ra of the head moving slider 81R.

Note that capstans 94N and 94R are provided upright at the centers of the flywheels 22 and 23, and the capstans 94N and 94R protrude from the upper surface of the mechanical chassis 2.

An AMS slider 95 is supported on the lower right side of the mechanical chassis 2 at a substantially right half of the front end so as to be movable in the left-right direction. The AMS slider 95 has a substantially crank shape when viewed from above, and has left and right guided holes 96a and 96b formed at a portion near the left end and a portion near the right end. Guide piece 9
The guided holes 96a and 96b are slidably engaged with the guide holes 7a and 97b, whereby the AMS slider 95 is slidably supported in the left-right direction within the range defined by the guided holes 96a. You. Further, the right guided hole 96b is formed longer than the left guided hole 96a, and the AMS slider 95 has moved to the left end of the movement range, that is, the right end edge of the guided hole 96a is the guide piece 97a. The right guided hole 96b has a margin on the right side of the guide piece 97b.
b 'is a connecting portion.

The trailing edge of the left end of the AMS slider 95 projects slightly rearward, and the trailing edge 98 of the projecting portion serves as a position regulating edge. At the right end of the AMS slider 95, a spring hook 99 is vertically provided. Then, one arm 100a of the torsion coil spring 100 is elastically contacted with the spring hook 99 from the right side.
Is biased to move to the left.

Next, the formation of each mode by the above-described mode forming system will be described.

The state shown in FIG. 9 is the stop mode.

In the stop mode, the plunger 4
Reference numeral 9 denotes a non-excited state, in which the operation piece 49a is retracted into the plunger 49. Therefore, the operation projection 46 of the trigger lever 42 engages with the stop surface 31a of the cam gear 27 to rotate the cam gear 27. Has been stopped. The cam gear 27 has a toothless portion 29a corresponding to the small gear 26b of the drive gear 26. Therefore, even when the motor 16 is driven, the cam gear 27 does not rotate. Then, since the trigger lever 42 is at the above-described position, the FR gear 62 is brought into a state in which the FR gear 62 is engaged with the gear portion 11 of the main gear 8 of the clutch portion 7 by the rotating force of the torsion coil spring 53. ing.

Accordingly, as described above, when the motor 16 is driven to rotate the main gear 8 in the counterclockwise direction,
When the FR gear 62 meshes with the relay gear 6a, the reel base 4R is rotated at a high speed in the rewinding direction, and when the main gear 8 rotates clockwise, the FR gear 62 meshes with the relay gear 5b and the reel base 4F is rotated. It will be rotated at high speed in the fast-forward direction.

The NR slider 63 is in the above-described neutral state. Therefore, the relay levers 77N and 77R are NR sliders 63 whose pressed pieces 78N and 78R are in the neutral state.
, The head movement sliders 81N and 81R are located at the front end of the movement range, and the head base 68 is also located at the front end of the movement range.

The AMS slider 95 is in a state where its left edge is in elastic contact with the AMS position regulating piece 74 of the head base 68 from the right.

Next, the reverse reproduction mode will be described.

From the stop mode described above, the plunger 49 is excited and the motor 16 is driven to rotate the drive gear 26 clockwise.

When the plunger 49 is excited, the action piece 49a is projected, the trigger lever 42 is rotated clockwise as viewed from above, and the action projection 46 is disengaged from the stop surface 31a of the cam gear 27. It moves toward the center of the cam gear 27. As a result, the cam gear 27 can rotate in the counterclockwise direction, and the action projection 46 presses the initial biasing surface 32 a of the cam gear 27 by the turning force applied to the trigger lever 42 by the torsion coil spring 44. As a result, the cam gear 27 is slightly rotated in the counterclockwise direction, and the gear portion 28 meshes with the small gear 26b of the drive gear 26 (see FIG. 10). It rotates counterclockwise until 29b corresponds to the small gear 26b of the drive gear 26.

When the trigger lever 42 rotates clockwise, the pressing projection 47 presses the pressed portion 54 of the FR lever 50 substantially to the right front. 50 rotates clockwise against the elastic force of the torsion coil spring 53, and the FR gear 62 supported by it rotates away from the gear 11 of the main gear 8 of the clutch 7 (FIG. 10). reference). Therefore, the FR gear 62 has no relation to the rotation of the reel bases 3F and 3R. Then, as described above, the cam gear 27 is rotated in the counterclockwise direction, so that the FR lever 50 is rotated.
Is engaged with the inner surface of the peripheral wall 34 on the upper surface side of the cam gear 27 (see FIG. 11), whereby the FR lever 50 operates as described above until the stop mode is again set. It is held in a state of being turned in the circumferential direction.

On the other hand, while the cam gear 27 rotates to the next stop position, the trigger lever 42 has its action projection 46 pressed against the peripheral edge of the cam gear 27 by the return slope 33a of the cam gear 27, whereby the trigger The lever 42 is rotated in the counterclockwise direction, and the action piece 49 a connected thereto is attracted to the plunger 49.
Therefore, the cam gear 27 has the toothless portion 29b and the drive gear 2
6 comes to a position corresponding to the small gear 26b,
The action projection 46 of the trigger lever 42 engages with the next stop surface 31b of the cam gear 27 (see FIG. 11), thereby holding the cam gear 27 at the stop position.

Further, while the cam gear 27 rotates to the next stop position, the NR slider 63 is moved rightward.
When the cam gear 27 is rotated counterclockwise from the stop mode, the controlled projection 65 of the NR slider 63 is rotated.
Abuts against the tension surface 36a of the cam gear 27, and is then pulled rightward by the tension surface 36a (see FIG. 19).

When the counterclockwise end of the toothless portion 29b reaches a position corresponding to the small gear 26b of the drive gear 26, the controlled projection 65 resiliently contacts the first working surface 36b of the cam gear 27. (See FIG. 11). That is, when the NR slider 63 moves to the right, the abutting piece 64b pulls the abutting portion 18b of the tension lever 17 to the right, whereby the tension lever 17 is rotated counterclockwise and the tension coil spring is turned. 20 is extended, and its tensile force acts to return the NR slider 63 to the left. The pulling force of the pulling coil spring 20 acts on the first working surface 36b via the controlled protrusion 65, and the cam gear 27 is urged to rotate counterclockwise, and the stop surface 31b is turned on the trigger lever 42. Action projection 4
6 is engaged.

When performing the above fast-forward or rewind,
Although a large rotation torque is required, a large rotation torque is not required in the reproduction mode. Therefore, when the NR slider 63 is in the neutral state, the tension pulley is located at a position necessary for extending the drive belt 25 so as to obtain the torque required for fast-forwarding and rewinding, and the playback mode is set to the reproduction mode. At times, the tension lever 17 is rotated counterclockwise to loosen the tension of the drive belt 25 so that only the torque necessary for the reproduction mode is obtained, thereby reducing the power consumption. This is the same in a normal reproduction mode described later (see FIGS. 11 and 13).

When the NR slider 63 moves to the right,
The pressed piece 66R is the pressed piece 14 of the NR switching lever 14.
R is pushed substantially rearward right, whereby the NR switching lever 14 rotates counterclockwise, and the small gear 15b of the NR switching gear 15 supported thereby meshes with the relay gear 6a, and the reel base 3R is rotated in the reverse direction.

Further, when the NR slider 63 moves to the right, the pressing pin 67a moves the relay lever 77R.
Is pressed to the right, whereby the relay lever 77R is rotated clockwise. Further, since the other pressing pin 67b of the NR slider 63 is separated rightward from the pressed piece 78Na of the other relay lever 77N, the relay lever 77N is rotated clockwise by the torsion coil spring 87N. The engagement piece 79Na is brought into elastic contact with the engagement piece 76b of the head base 68 from the right.

When the relay lever 77R rotates clockwise, the pressing piece 80Ra moves the head moving slider 81R.
The R pressed piece 82Ra is pressed rearward, whereby the head moving slider 81R moves rearward. When the head moving slider 81R moves rearward, the pressing arm 83R presses the pressed piece 75a of the head base 68 rearward, whereby the head base 68 moves rearward against the tensile force of the tension coil spring 73. You. And
When the head base 68 moves to the reproduction position where the rear magnetic head 71 reliably contacts the magnetic tape, the engagement piece 76b goes to the rear side of the engagement piece 79Na of the relay lever 77N. By rotating clockwise, the engaging piece 79Na is positioned in front of the engaging piece 76b of the head base 68 and is engaged therewith, so that the head base 68 is prevented from returning forward. The AMS position regulating piece 74 also escapes backward from the left edge of the AMS slider 95 due to the backward movement of the head base 68. Therefore, the AMS slider 95 moves left until the right end of the guided hole 96a comes into contact with the guide piece 97a. , So that the position regulating edge 98 is moved to the AM of the head base 68.
It is located slightly away from the S position regulating piece 74 on the front side.

Further, when the head moving slider 81R moves rearward, the pinch pressing piece 84Ra presses one arm 93Ra of the torsion coil spring 93R rearward, whereby the pinch arm 90R moves counterclockwise. And the pinch roller 92R supported by it is pressed against the capstan 94R via a magnetic tape (not shown).

Thus, the reverse reproduction mode in the state shown in FIG. 11 is set.

Next, the normal reproduction mode will be described.

In the normal reproduction mode, the plunger 49 is excited and the motor 16 is driven from the state shown in FIG.

That is, when the plunger 49 is excited,
As described above, the trigger lever 42 is rotated clockwise, the action projection 46 is displaced from the stop surface 31b of the cam gear 27 in the center direction, and the lock on the cam gear 27 is released (see FIG. 12). Thereby, the tensile force of the tension coil spring 20 is applied to the first working surface 36b of the cam gear 27 via the controlled protrusion 65 of the NR slider 63.
Then, it acts on the second working surface 36c, whereby
The cam gear 27 is rotated in the counterclockwise direction, and its gear portion 28 meshes with the small gear 26b of the drive gear 26, whereby the cam gear 27 has the next toothless portion 29c corresponding to the next small gear 26b. Will be rotated to the stop position.

While the cam gear 27 rotates to the next stop position described above, the trigger lever 42 is
6 is the cam gear 2 by the return slope 33b of the cam gear 27.
7, the trigger lever 42 is rotated in the counterclockwise direction, and the operating piece 49a connected thereto is attracted to the plunger 49. Accordingly, when the cam gear 27 rotates to the position where the toothless portion 29c corresponds to the small gear 26b of the drive gear 26, the action projection 46 of the trigger lever 42 engages with the next stop surface 31c of the cam gear 27 ( FIG. 13).
The cam gear 27 is held at the stop position.

Further, while the cam gear 27 rotates to the next stop position, the NR slider 63 is moved to the left, returns to the neutral position, and is further moved to the left. When the cam gear 27 is rotated in the counterclockwise direction from the reverse reproduction mode, the controlled protrusion 65 of the NR slider 63 comes into contact with the pushing surface 39a of the cam gear 27, and then the pushing surface 39a
To the left (see FIG. 20).

When the counterclockwise end of the toothless portion 29c reaches a position corresponding to the small gear 26b of the drive gear 26, the controlled projection 65 is brought into contact with the operating surface 3 of the cam gear 27.
9b. That is, the NR slider 63
Moves to the left, the abutting piece 64a presses the abutting portion 18a of the tension lever 17 to the left, whereby
The tension lever 17 is rotated counterclockwise to extend the tension coil spring 20, and the tension acts to return the NR slider 63 to the right. The pulling force of the pulling coil spring 20 acts on the working surface 39b via the controlled protrusion 65, the cam gear 27 is urged to rotate in the counterclockwise direction, and the stop surface 31c of the cam gear 27 acts on the working protrusion of the trigger lever 42. And 46 (see FIG. 13).

When the NR slider 63 moves to the left,
The pressed piece 66F is the pressed piece 14 of the NR switching lever 14.
F is pushed substantially rearward left, whereby the NR switching lever 14 rotates clockwise, and the small gear 15b of the NR switching gear 15 supported thereby meshes with the relay gear 5a, and the reel base 3F Is rotated in the normal direction.

Further, when the NR slider 63 moves to the left, the pressing pin 67b moves the relay lever 77N.
Is pressed leftward, whereby the relay lever 77N is rotated counterclockwise. Also, NR
Since the other pressing pin 67a of the slider 63 moves leftward from the pressed piece 78Ra of the other relay lever 77R, the relay lever 77R is connected to the torsion coil spring 87R.
Is rotated in the counterclockwise direction by the engagement piece 79Ra.
Is in elastic contact with the engaging piece 76a of the head base 68 from the left.

When the relay lever 77N rotates in the counterclockwise direction, the pressing piece 80Na moves the head moving slider 8
The 1N pressed piece 82Na is pressed rearward, whereby the head moving slider 81N moves rearward.
When the head moving slider 81N moves rearward, the pressing arm 83N presses the pressed piece 75b of the head base 68 rearward, whereby the head base 68 moves rearward against the pulling force of the tension coil spring 73. You. When the head base 68 moves to the reproducing position where the rear magnetic head 71 reliably contacts the magnetic tape, the engaging piece 76a goes rearward of the engaging piece 79Ra of the relay lever 77R. Is further rotated in the counterclockwise direction so that the engagement piece 79Ra is located on the front side of the engagement piece 76a of the head base 68 and is engaged therewith.
The head base 68 is prevented from returning forward. A
The MS slider 95 is held in a state where it has been moved to the left end of its moving range.
Are held slightly in front of the AMS position regulating piece 74 of the head base 68.

Further, when the head moving slider 81N moves rearward, the pinch pressing piece 84Na presses one arm 93Na of the torsion coil spring 93N rearward, whereby the pinch arm 90N moves clockwise. The pinch roller 92N is rotated and pressed against the capstan 94N via a magnetic tape (not shown). Since the left head moving slider 81R is returned forward by the clockwise rotation of the relay lever 77R, the pinch arm 90R is rotated clockwise and the pinch roller 92R is separated from the capstan 94R. .

Thus, the normal reproduction mode shown in FIG. 13 is set.

Next, the AMS mode will be described.

In the normal reproduction mode, when the plunger 49 is excited and the motor 16 is driven, the AMS mode is formed.

That is, when the plunger 49 is excited,
As described above, the trigger lever 42 is rotated clockwise, and the action projection 46 escapes from the stop surface 31c of the cam gear 27 toward the center (see FIG. 14). Therefore,
Working surface 3 via controlled protrusion 65 of NR slider 63
9b, the cam gear 27 rotates counterclockwise due to the elastic force of the extension coil spring 20 and the gear portion 28
Meshes with the small gear 26b of the drive gear 26,
The cam gear 27 rotates counterclockwise until its stop surface 31a comes into contact with the action projection 46 of the trigger lever 42. During this time, the action projection 46 of the trigger lever 42 is moved toward the periphery of the cam gear 27 by the return slope 33c of the cam gear 27, and the trigger lever 42 is returned to the original posture.

When the cam gear 27 starts to rotate with its gear portion 28 meshing with the small gear 26b of the drive gear 26, the NR slider 63 has nothing to press or pull on the controlled projection 65. Therefore, the spring is moved rightward by the resilient force of the extension coil spring 20 received via the abutting piece 64a, and when it comes to the neutral position, the abutting pieces 18a of the tension lever 17 are attached to the abutting pieces 64a, 64b. Coil spring 20 received via the
Are held in the neutral position (see FIG. 15).

When the NR slider 63 returns to the neutral position, the relay levers 77N and 77R return to the neutral position, and the head moving sliders 81N and 81R return to the front end of the moving range. As a result, the pinch arm 90N rotates counterclockwise to separate the pinch roller 92N supported by the pinch arm 90N from the capstan 94N, and the head base 68 moves the engagement piece 76a and the relay lever 77.
The R is disengaged from the engagement piece 79Ra, and is moved forward by the tensile force of the extension coil spring 73. However,
Since the position restricting edge 98 of the AMS slider 95 is located slightly away from the front side of the AMS position restricting piece 74 of the head base 68, the AMS slider 95 is moved slightly forward.
The MS position restricting piece 74 engages with the position restricting edge 98, whereupon the forward movement of the head base 68 stops. This is the AMS mode shown in FIG. 15. In this state, the magnetic head 71 is in AM contact with a magnetic tape (not shown).
Come to S position.

Further, since the controlled projection 56 of the FR lever 50 comes to a position corresponding to the notch 34a of the peripheral wall 34 of the cam gear 27, the FR lever 50 rotates counterclockwise by the force given by the torsion coil spring 53. The FR gear 62 supported thereby is engaged with the gear 11 of the main gear 8 of the clutch 7. Therefore, when the main gear 8 rotates counterclockwise, the FR gear 62 meshes with the relay gear 6a, and the reel base 3R is rotated at a high speed in the reverse direction,
When the main gear 8 rotates clockwise, the FR gear 62 meshes with the relay gear 5b, and the reel base 3F rotates at a high speed in the normal direction.

Next, a description will be given of a mechanism for returning the positions of all the members to the initial positions and forming the eject mode for enabling the tape cassette to be taken out of the apparatus.

An eject lever 101 is supported at the center of the right end of the lower surface of the mechanical chassis 2 so as to be movable in the left-right direction. The eject lever 101 has an operating portion 102 protruding rightward from a right edge of the mechanical chassis 2, and includes a stopper piece 103a, a spring hook piece 104, and a spring support piece 105.
And a stopper edge 103b located to the left of the stopper piece 103a is provided.
Further, a pressing piece 106 is formed on the eject lever 101. The stopper piece 103a is formed by a peripheral wall 34 on the upper surface side of the cam gear 27 and protrusions 35a, 35b,
35c. Also, the spring support piece 10
5 is a coil portion 100c of the torsion coil spring 100.
Are fitted and supported outside, and the torsion coil spring 1 is
The other arm 100b of 00 is elastically contacted with the spring hooking piece 104 of the eject lever 101 from the left side, and the moving force of the eject lever 101 to the right is urged.

The right end of the operating force adjusting lever 107 is rotatably supported by the rear end of the eject lever 101. A connecting piece 10 is provided at the left end of the operating force adjusting lever 107.
8 protrudes leftward, a pressing arm 109 protrudes leftward at a distance from the front of the connecting piece 108, and a pressing piece 109 a protrudes from the left end of the pressing arm 109. .

The connecting piece 108 is connected to the FR lever 5
0, so that the operating force adjusting lever 1 is held with the rotation of the FR lever 50.
07 is also rotated. That is, when the FR gear 62 supported by the FR lever 50 is engaged with the gear portion 11 of the main gear 8 of the clutch portion 7,
The operating force adjusting lever 107 has its pressing piece 109a at a position behind the pressed part 48 of the trigger lever 42 in a state where the action piece 49a of the plunger 49 is sucked, and from this state, the FR lever 50 moves clockwise. When rotated, the operating force adjusting lever 107 is rotated in the counterclockwise direction, and the pressing piece 109 a of the operating force adjusting lever 107 is moved rightward by the pressed portion 48 of the trigger bar lever 42 in a state where the action piece 49 a of the plunger 49 is sucked. It is in a state of approaching from one side.

An eject relay lever 110 is rotatably supported at a position on the lower surface of the mechanical chassis 2 between the right end of the AMS slider 95 and the eject lever 101. A pressed piece 111 is vertically provided at the rear end of the eject relay lever 110, and the pressed piece 111 is in contact with the pressing piece 106 of the eject lever 101 from the left. A pressing piece 112 is formed at the right end of the eject relay lever 110. Further, a connecting pin 113 is vertically provided at a front end of the eject relay lever 110, and the connecting pin 113 is connected to the connecting portion 9 of the AMS slider 95.
6b '.

A locking member 115 is supported on the right side wall 114 of the mechanical chassis 2 so as to be movable in the front-rear direction. The locking member 115 is urged forward by a compression coil spring 116 compressed between the locking member 115 and the right side wall. The pressed piece 1 is provided at the lower end of the locking member 115.
The projecting piece 117 is in elastic contact with the pushing piece 112 of the eject relay lever 110 from behind.

Further, an engagement notch 118 opened forward is formed at the upper end of the locking member 115. An inclined edge 119 which is inclined forward and downward is formed at the front end of the upper edge of the locking member 115.

The mechanical chassis 2 is arranged in a housing 120 opened on the upper surface of the tape player 1, and the housing 120 is provided with a lid 121 for opening and closing the upper surface opening. The left end of the lid 121 is rotatably supported by the left end of the housing 120. An engagement member 122 protrudes from the inner surface of the right end of the lid 121 so that the lid 1
When the closing member 21 is closed, the engaging member 122
Of the locking member 11 is pressed.
5 moves rearward, and when the engaging member 122 corresponds to the opening of the engaging notch 118 of the engaging member 115, the engaging member 115 returns to the front by the extension force of the compression coil spring 116, and the engaging notch 118 Engaging member 122 of lid 121
Are engaged, whereby the lid 121 is locked in the closed position where the opening of the housing 120 is closed.

Next, the ejection operation will be described.

First, the ejection operation from the stop mode or the AMS mode will be described.

In the stop mode shown in FIG. 9, the eject lever 101 is pushed to the left. Then, the pressing piece 106 of the eject lever 101 is moved to the eject relay lever 11.
Since the zero pressed piece 111 is pressed to the left, the eject relay lever 110 rotates counterclockwise when viewed from above, and the pressed piece 112 moves substantially rearward (see FIG. 16). Therefore, the locking member 115 is formed by the pressing piece 112.
Is pressed rearward, the locking member 115 is moved rearward against the moving force urged by the compression coil spring 116, and the engagement notch 118 is moved from the engagement member 122 of the lid 121 by the engagement notch 118. Escape to the rear, so that the lid 1
The lock of the closed position 21 is released.

When the force that pushed the eject lever 101 to the left is removed, the eject lever 101 returns to its original position by the torsion coil spring 100, and accordingly, the eject relay lever 110 and the locking member 115 also return to their original positions. Return to the position.

The ejection operation from the AMS mode is almost the same as the ejection operation from the stop mode.
However, when the eject relay lever 110 is rotated counterclockwise, the connecting pin 113 presses the right edge of the connecting portion 96b 'of the AMS slider 95 rightward,
As a result, the AMS slider 95 moves rightward, and the position regulating edge 98 escapes rightward from the AMS position regulating piece 74 of the head base 68, so that the head base 68 moves to the front end of the moving range.

Next, the ejection operation from the reverse reproduction mode will be described.

When the eject lever 101 is pushed leftward from the reverse playback mode shown in FIG. 11, the operating force adjusting lever 107 also moves leftward, and the pressing piece 109a moves the pressed portion 48 of the trigger lever 42 leftward. And the trigger lever 42 is rotated clockwise, and the action projection 46 of the trigger lever 42 is moved to the stop surface 31 of the cam gear 27.
The cam gear 27 is unlocked from the center gear b. Then, the controlled projection 65 of the NR slider 63 to which the tension force of the extension coil spring 20 is acting presses the first action surfaces 36b and 36c of the cam gear 27 one after another.
The NR slider 63 returns to the neutral position while rotating the cam gear 27 in the counterclockwise direction (see FIG. 17).

At this time, in order to prevent the cam gear 27 from rotating too much in the counterclockwise direction and the gear portion 28 from meshing with the small gear 26b of the driving gear 26, the eject lever pushed to the left is used. Stopper piece 103 of 101
a comes into contact with the side surface of the projection 35c of the cam gear 27 in the counterclockwise direction to prevent the cam gear 27 from rotating more than necessary in the counterclockwise direction (see FIG. 17).

When the NR slider 63 returns to the neutral position, the relay levers 77N and 77R and the head moving sliders 81N and 81R return to the neutral state, and the lock of the head base 68 to the reproduction position is released.

At the same time, the eject relay lever 110 is rotated counterclockwise, so that the connecting pin 113 is moved almost rightward and the AMS slider 95 is moved.
Presses the right edge of the connecting portion 96b 'to the right, whereby the AMS slider 95 moves to the right, and the position regulating edge 98 of the AMS position regulating piece 74 of the head base 68 is moved.
The head base 68 is returned to the front end of the moving range by the tensile force of the tension coil spring 73. At the same time, the locking member 115 is moved rearward to release the lock on the lid 121 as described above.

In the ejection operation from the reverse playback mode, an operation of rotating the trigger lever 42 clockwise is added as compared with the ejection operation from the stop mode. Therefore, pushing the eject lever 101 to the left requires more force than when ejecting from the stop mode. That is, the operational feeling is heavy. As described above, the operation feeling when performing the eject operation from the playback state is increased to prevent erroneous operation.

The ejection operation from the normal reproduction mode will be described.

When the eject lever 101 is pushed leftward from the normal reproduction mode (FIG. 13), the trigger lever 42 is rotated clockwise in the same manner as in the above-described ejection operation from the reverse reproduction mode. The action projection 46 is disengaged from the stop surface 31c of the cam gear 27 toward the center, and the lock on the cam gear 27 is released. Then, the NR where the tensile force of the tensile coil spring 20 is acting
The controlled protrusion 65 of the slider 63 presses the working surface 39b of the cam gear 27, then presses the portion of the protrusion 35b near the outer periphery of the clockwise side surface 39c, and rotates the cam gear 27 in a counterclockwise direction while rotating the NR slider. 63 returns to the neutral position (see FIG. 18).

In this case, too, the cam gear 27 is pushed to the left so as not to rotate too much in the counterclockwise direction so that the gear portion 28 meshes with the small gear 26b of the drive gear 26. Stopper piece 1 of eject lever 101
03a comes into contact with the clockwise side surface of the allowance portion 38 formed on the outer peripheral surface of the projection 35a of the cam gear 27 to prevent the cam gear 27 from rotating more than necessary in the counterclockwise direction (see FIG. 3). See FIG. 18).

When the NR slider 63 returns to the neutral position, the relay levers 77N and 77R and the head moving sliders 81N and 81R return to the neutral state, and the lock of the head base 68 to the reproduction position is released.

At the same time, the eject relay lever 110 is rotated in the counterclockwise direction, so that the connecting pin 113 is moved almost rightward and the AMS slider 95 is rotated.
Presses the right edge of the connecting portion 96b 'to the right, whereby the AMS slider 95 moves to the right, and the position regulating edge 98 of the AMS position regulating piece 74 of the head base 68 is moved.
The head base 68 is returned to the front end of the moving range by the tensile force of the tension coil spring 73. At the same time, the locking member 115 is moved rearward to release the lock on the lid 121 as described above.

Incidentally, even in the ejection operation from the normal reproduction mode, an operation of rotating the trigger lever 42 in the clockwise direction is added.
Pushing 01 to the left requires more force than during the eject operation from the stop mode, and the operational feeling is heavy. To prevent erroneous operation when performing the eject operation from the playback state I have.

As described above, the ejecting operation is performed by pushing the ejecting lever 101 to the left. In particular, even if the power is cut off due to running out of the battery during the playback mode, the battery is not replaced. Both
The tape cassette can be taken out by pushing the eject lever 101 to the left.

However, if the ejecting operation is performed while the head base 68 is moving in the middle of each mode, the magnetic head 71 mounted on the head base 68 may be damaged. During the movement, the ejection operation is not performed, that is, the ejection lever 101 is prevented from being pushed to the left.

That is, when the reverse playback mode is formed from the stop mode or the AMS mode, the cam gear 2
As soon as 7 starts to rotate in the counterclockwise direction, the blocking surface 40a of the blocking projection 40 of the cam gear 27 is located immediately to the left of the stopper edge 103b of the eject lever 101, and the blocking projection 40 of the blocking gear 40 is moved to the next stop position. The blocking surface 40a is located immediately to the left of the stopper edge 103b (see FIG. 19). Therefore, even if the user tries to push the eject lever 101 leftward, the stopper edge 103b abuts against the blocking projection 40, and the eject lever 101 cannot be pushed leftward.

In the case where the normal reproduction mode is formed from the reverse reproduction mode, as soon as the cam gear 27 starts to rotate in the counterclockwise direction, the blocking surface 41 of the projection 35c is located immediately to the left of the stopper 103a of the eject lever 101. (See FIG. 20), and then the blocking surface 3 of the projection 35a.
The ejection lever 101 is prevented from being pushed to the left until the position 7 is reached and the next stop position is reached.

[0123]

As is apparent from the above description, the tape cassette recording and / or reproducing apparatus of the present invention is
An eject lever for performing an eject operation for enabling a tape cassette mounted at a cassette mounting position, which is a position for performing recording and / or reproduction of the tape cassette, to be taken out of the apparatus; and recording and / or reproducing by an eject operation of the eject lever. Or a head retreating means for separating a reproducing head from a magnetic tape, and an eject preventing means for preventing an ejecting operation of the eject lever while the head moves in a direction in which the head comes into contact with the magnetic tape. And

Therefore, the tape cassette recording and / or
Alternatively, in the reproducing apparatus, the tape cassette can be taken out except when the head is moving to the recording / reproducing position.
Therefore, even if the power supply is cut off during recording or playback due to battery exhaustion or power outage, it is possible to remove the tape cassette without replacing the battery or eliminating the power outage. it can.

Further, in the invention according to claim 2,
When the head is at the recording or reproducing position where it comes into contact with the magnetic tape, the erroneous operation preventing means for increasing the force required for the ejecting operation of the ejecting lever is provided, so that the ejecting operation is inadvertently performed during recording or reproducing. Erroneous operation can be prevented.

Incidentally, the specific shapes and structures of the respective parts shown in the above-described embodiments are merely examples of the embodiment of the present invention, and the technical scope of the present invention is not limited thereto. Should not be interpreted restrictively.

[Brief description of the drawings]

FIG. 1 shows an embodiment in which a tape cassette recording and / or reproducing apparatus of the present invention is applied to a tape player, and FIG. 1 is a perspective view showing an appearance of the tape player.

FIG. 2 is a perspective view showing an appearance of the tape player with a lid opened.

FIG. 3 is an exploded perspective view of a mechanism section.

FIG. 4 is a plan view of a mechanism.

FIG. 5 is a bottom view of the mechanism section.

FIG. 6 is an enlarged sectional view taken along the line VI-VI in FIG. 5;

FIG. 7 is an enlarged plan view of a cam gear.

FIG. 8 is an enlarged view showing the bottom surface of the cam gear when viewed from above.

9 shows the formation of each mode together with FIGS. 10 to 15 in a state where main elements are viewed in a plan view and a part is omitted, and FIG. 9 shows a stop mode.

FIG. 10 shows a state immediately after the plunger is excited from the stop mode.

FIG. 11 shows a reverse playback mode.

FIG. 12 shows a state immediately after the plunger is excited from the reverse reproduction mode.

FIG. 13 shows a normal reproduction mode.

FIG. 14 shows a state immediately after the plunger is excited from the normal reproduction mode.

FIG. 15 shows an AMS mode.

FIG. 16 shows an ejecting operation together with FIGS. 17 and 18 in a state where main elements are viewed in a plan view and a part of the ejecting operation is omitted, and FIG. It is.

FIG. 17 illustrates a state in which the eject lever is ejected from the reverse playback mode.

FIG. 18 illustrates a state in which an eject lever is operated from a normal reproduction mode.

FIG. 19 shows a state in which the reverse playback mode is being formed from the stop mode in a state where main elements are viewed in a plan view and a part is omitted.

FIG. 20 is a view showing a state in which a normal reproduction mode is being formed from a reverse reproduction mode by viewing main elements in a plane, and
It is shown with some parts omitted.

[Explanation of symbols]

1. Tape player (tape cassette recording and / or reproducing device), 27, 37, 40a, 41, 103a, 1
03b: eject prevention means, 27: cam gear, 37 ...
Blocking surface, 40a Blocking surface, 41 Blocking surface, 103a Stopper piece, 103b Stopper edge, 42, 48, 49,
107: erroneous operation prevention means, 42: trigger lever, 48
... Pushed part, 49 ... Plunger, 107 ... Operating force adjustment lever, 63, 68, 73, 77N, 77R, 95, 1
10: head retraction means, 63: NR slider, 68:
Head base, 73: tension coil spring, 77N: relay lever, 77R: relay lever, 71: magnetic head, 101
… Eject lever

Claims (2)

[Claims] 1. An eject lever for performing an eject operation for enabling a tape cassette mounted at a cassette mounting position, which is a position where recording and / or reproduction of a tape cassette is performed, to be taken out of the apparatus; and an eject lever for the eject lever. A head retreating means for separating a recording and / or reproducing head from the magnetic tape by an operation; and an eject preventing means for preventing an ejecting operation of the eject lever during movement of the head in a direction in which the head comes into contact with the magnetic tape. A tape cassette recording and / or reproducing apparatus, comprising: 2. An erroneous operation preventing means for increasing a force required for an ejecting operation of said ejecting lever when said head is at a recording or reproducing position in contact with a magnetic tape. The tape cassette recording and / or reproducing apparatus according to claim 1.