JPH0740386B2 - Cassette tape player - Google Patents

Description

Detailed Description of the Invention [0001] BACKGROUND OF THE INVENTION This application relates to a cassette tape player.
Regarding [0002] 2. Description of the Related Art Conventionally, a fast feed lever and a rewind lever are
Equipped with a program lever exclusively for switching crab channels,
Press the rewind lever or program lever during playback.
A channel switching mechanism is constructed by operating pressure.
Unlock the notch gear and unlock the notch gear by half a turn
However, this half rotation operation switches the channel.
A cassette tape player is, for example, Japanese Patent Laid-Open No. 62-8925.
It is known in Japanese Patent No. 8 publication. [0003] However, according to the above-mentioned
Depending on the conventional configuration, the rewind lever or program lever
When performing channel switching by pressing,
When the work continues for more than half a turn of the notched gear,
Malfunction that channel switching operation is repeated again
Such malfunctions cause cassette tape play.
Ya is used by an unspecified number of people
Often arises from the
It The present application aims to achieve this need. [0004] The present application has achieved the above-mentioned objects.
Channel switching mechanism to change the channel
Notch gear that operates the member and restraint integrally with this notch gear
A piece and an urging piece for urging an initial rotational force to the notched gear
When pressing the operation lever, the
A first rod that rotates against a dynamic restoring force and an interlock with the first rod.
It is a member that always engages with the restraining piece and
Rolling is restrained, and the first rod pushes the operation lever.
When rotated in response to an operation, lock with the restraint piece.
Installed integrally with the second rod that operates in the unwinding direction and the notched gear.
And act on the first rod when the notched gear is stopped.
And when it rotates, it acts with the first rod,
A piece piece that operates in a direction to lock the second rod with the restraining piece.
It is characterized by what has been obtained, specifically, the first rod
However, the base is rotatably attached to the device frame, and the free end is operated.
A rotatable head with a V-shaped protrusion that acts with a lever
The bendable part that is deformable so that the urging force is generated from
Through a right angle direction and has an engaging pin at its tip.
The second rod is bent in an L shape, and the bent portion is rotatable.
And one of the pieces extends parallel to the first rod.
And a locking pin that locks with the restraint piece at its intermediate position.
And extend so as to intersect the first rod at a right angle.
At the tip of the other piece that is engaged and disengaged with the engagement pin.
And a piece piece as a non-acting surface for the first rod.
One of the first rod and the second rod, which has an action surface.
A spring is stretched between the and
The engaging pin engages with the engaging recess in the locked state of the vehicle, and
The locking pin locks with the restraint piece and the non-working surface of the piece piece
Is separated from the first rod and the head of the first rod is rotated,
If the stop pin separates from the restraint piece and the notch gear rotates,
The action surface of the piece acts on the first rod.
It [0005] [Action] Therefore, the restraining piece is attached to the locking pin provided on the second rod.
Locks, the notched gear stops, and the tape moves in one direction.
Press the operation lever from the playing state while running.
Then, in response to this, the first rod rotates, and by this rotation,
The locking rod is disengaged from the restraint piece by interlocking with the second rod.
Rotate in the direction of
The notched gear is initially rotated by the biasing piece. Then the notch
The gear is rotated by meshing with the operating gear and is aligned with the cutout gear.
The piece piece of the body also rotates, and the acting surface of the piece piece acts on the first rod.
The first rod operates, which causes the second rod to move in the opposite direction to the above.
That is, the locking pin operates in the direction of locking with the restraining piece.
And the notched gear rotated for the time needed to switch channels.
After that, for example, the position where the notch gear is out of mesh with the operating gear.
When it is placed, the restraint piece that rotates integrally with it is locked
The notch gear stops rotating by engaging with the pin, and
The channel switching operation is completed. [0006] Embodiments of the present application will be described in detail with reference to the drawings.
Then, Fig. 1 and Fig. 2 show the plan view and the non-playing state.
And side views, and Figs. 3 and 4 show the flat state in play.
The side view and the side view are respectively shown, 1 is a device frame,
A fast-forward lever 2 and a rewind lever 3 are provided on the upper surface of one side.
In parallel with each other and can be moved back and forth, and on the side wall 1a on the other side.
Are equipped with eject control levers 4 that can be moved back and forth.
Now, the levers 2, 3 and 4 are respectively
By pulling 5, 6 and 7, there is always elastic pressure in the front direction.
It is energized. 8 on both sides at the rear (cassette insertion direction) end
The part is supported by the pivot 9 with respect to the device frame 1 so as to be tiltable in the vertical direction.
Connected to the received rear frame 8a and its front (front direction) edge
And a front frame 8b that can move up and down in a horizontal state
With the set holder 8, the center part of the rear frame 8a is
Has a guide groove 10 extending in the direction, and in this guide groove 10,
When cassette C is inserted into cassette holder 8,
Guide piece having an engaging claw 11 'for engaging with the reel hole of
11 is slidably attached. 12 has one end after
It is pivotally attached to the upper surface of the part frame 8a via a pivot 13, and
The support piece 14 provided on the eject operation lever 4 is provided between
One end of the connecting rod 15 is supported by
The guide piece 1 is provided at the tip of the piece and the guide piece 11.
Reversing 1 to suppress the ejection position of cassette C in the normal state
A spring 16 is attached. 17 is the cassette holder
The inner surface of the upper part of the rear frame 8a of the -8 is attached to the water by the pivot 13.
It is a flat plate-shaped holding member that is attached so that it can rotate freely.
One side of the guide groove 10 extends so as to cross the guide groove 10.
It has a working piece 18 and has a tongue piece 19 on the outer side.
Is provided, and the side wall 1a is always supported by the spring 20.
It is biased in the opposite direction, and this is the side wall 1a of the device frame 1.
The same as the eject lever 4, sliding in the front-back direction
It is mounted so that it can be attached at all times by the spring 21.
Protruding on the upper edge of the long action plate 22 that is elastically biased toward you
Being hung on the projecting side 23 and being urged toward you
Holds the holding member 17 in a horizontal state,
The cassette holder 8 is also held horizontally. 24
Is one side edge of the rear frame 8a of the cassette holder 8.
It is bent and formed so as to overlap with the rear portion of the working plate 22.
A sleeve plate with a shaft pin 25 provided on the action plate 22
An engaging hole 26 for engaging is provided. The engagement hole 26 is
It extends diagonally, and the upper and lower ends of it extend forward and backward.
Each of which has a bent receiving portion 26a and 26b,
The pin 25 serves as a lower receiving portion 26b in the non-playing state.
Locks and locks with the upper receiving portion 26a in the playing state
To do. However, is it the non-playing state shown in FIGS.
The cassette C to the front frame 8b of the cassette holder 8 to the right
When inserted from the opposite side, the cassette is inserted into the engaging claw 11 '.
When one reel hole of C is engaged, the guide piece 11
Moves backward, and the reversing spring 16 reverses with the movement.
However, due to the reversing elasticity, the cassette C and the guide piece 11
Automatically penetrate deep into the cassette holder 8,
And the action piece 18 crossing the guide groove 10 is
Since it is pressed by C, the holding member 17 is attached to the spring 20.
Against this, horizontally rotating counterclockwise in FIG.
The tongue piece 19 and the projecting side (23) are unhooked by the action plate.
(22) is a spring (21), and it moves to the right in FIG.
After moving, the step portion 22 'provided on the upper edge of the working plate 22 is
Abutting on the step portion 4'provided on the lower edge of the eject lever 4,
The movement stops. During this movement process, the shaft pin 25 is engaged.
While sliding on the dowel hole 26, it moves to the upper receiving portion 26a.
, Which was held horizontally by the holding member 17.
The rear frame 8a of the set holder 8 is as shown in FIG.
Tilts downward, and the front frame 8b descends horizontally.
Then, as shown in FIGS. 3 and 4, a play state is set. From the state shown in FIG. 3 and FIG.
When the operation lever 4 is pushed against the biasing spring 7,
When the spring receiving piece 12 is reversed by the connecting rod 15 in FIG.
Since it rotates in the measuring direction, the reversing spring is moved by the movement of its free end.
16 reverses, and due to the reverse elasticity, the guide piece 11
It is guided in the guide groove 10 together with the cassette C.
Move toward the front, that is, the eject direction. On the other hand, Iji
The step portions 4'and 22 'are pushed along with the pushing of the operation lever 4.
The contact between the action plate 22 and the spring 21
It moves to the rear and the movement causes the shaft pin 25 to move to the upper receiving part.
26a slides through the engagement hole 26 and moves to the lower receiving portion 26b.
As it does, the sleeve plate 24 is pushed up,
The rear frame 8a of the set holder 8 tilts upward. Furthermore, together with the guide piece 11, the cassette C
Is moved in the eject direction, the pressing force of the action piece 18 is released.
Since the holding member 17 is broken by the restoring spring 20,
In FIG. 3, the rear frame 5 is rotated clockwise, and
When a reaches a horizontal state, the tongue piece 19 of the holding member 17
Once again, the projecting piece 23 of the action plate 22 can be engaged with the projecting piece 23 again.
From this state, release the pressing of the eject control lever 4.
Then, the lever 4 is restored by the spring 7, and
Since the step portion 4 ′ is separated from the step portion 22 ′, the action plate 22 also moves.
Moved to the right in FIG. 4 by the pulling 21,
With it slightly moved, the projection 23 is pressed against the tongue 19.
Then, the movement is blocked and the cassette holder
8 is held in a horizontal state by a holding member 17,
Return to the non-play state shown in FIGS. FIG. 5 mainly shows the head in the playing state.
A flat plate showing the relationship between the plate and the channel switching member.
FIG. 6 is a plan view, and FIG. 6 mainly shows a reel drive mechanism.
FIG. The head plate 27 is used for the fast-forwarding.
Located on the lower surface of the lever 2 and the rewind lever 3
A base part that is long in the direction and has a magnetic head 30 in the center part
27a and a device provided with an eject lever 4 from the central position
It extends in the direction of the side wall 1a of the frame 1 and has a trochanter 31 at its tip.
The leg portion 27b and the rear end portion of the base portion 27a.
It consists of a part 27b and a support piece 27c extending in parallel.
The head plate 27 configured as
It is possible to move laterally through the engagement of the pin 32 and the long hole 33.
And is attached to the support piece 27c.
The plate 27 is always in the direction of the side wall 1a, that is, in the play position.
A spring 34 for elastically biasing in the direction is attached. At the non-playing position of the head plate 27,
In addition, the trochanter 31 is located at the rear end position of the working plate 22.
Pressing against the horizontal pushing piece 35, the right side in FIG.
Placed in a position retracted in the direction, from this position cassette C
When the action plate 22 is moved toward the front by inserting the
The push piece 35 is disengaged from the trochanter 31 and the head plate 2
7 is played by the spring 34 as shown in FIG.
To the position, in which the long hole 33 hits the shaft pin 32.
By touching, it stops and the head plate 27
Held in the lei position. Base portion 27 of head plate 27
At the front and rear end positions of a, one end is pivotally attached to the device frame 36f, 36f.
and had pinch rollers 37f and 37r at the free end.
The brackets 38f, 38r and the brackets 38f,
The direction in which 38r is pressed against the capstan shafts 39f and 39r
Springs 40f and 40r for elastically biasing the spring
In the direction that resists the urging force of f and 40r,
And the locking pieces 41f and 41r for locking
Each is equipped. The channel switching member 42 is arranged in the front-back direction.
Top piece 4 each having a bent portion that extends and has both ends bent obliquely
2a and a right angle from the center position to the device frame side wall 1a
And a leg piece 42b extending in a circular shape, and bending at both ends of the top piece 42a.
The curved portion has an intermediate portion on the capstan shafts 39f and 39r.
One ends of rotating plates 43f and 43r that are pivotally connected to each other.
Does not engage the long holes 44f and 44r with the shafts 45f and 45r.
Are connected to the rotary plates 43f and 43r.
Due to its pivoting action, the brackets 38f, (38)
The projections (46) f, (4
6) r is provided for each. In addition, between both rotary plates 43f and 43r
A spring 47 is stretched under load. Therefore, the head plate 27 is not played.
When retracted to the position, the brackets 38f, 38
r is a locking piece 41 due to the urging force of the springs 40f and 40r.
f and 41r, respectively, and pinch roller 3
7f and 37r are corresponding capstan shafts 39f and 39
It is separated from r. From this state, the cassette holder
Inserting cassette C into No.8, as already mentioned,
Since the plate 27 advances toward the cassette C,
The brackets 38f and 38r also move in the same direction. This place
In this case, as shown in FIG. 5, the bracket 38r at the rear position
Is a protrusion 4 of the rotating plate 43r which is inclined clockwise in the drawing.
Since it abuts against 6r, one pinch roller 37r is
It does not press against the corresponding capstan shaft 39r, but at the front position
The bracket 38f at is in the counterclockwise direction in the figure.
Since it does not come into contact with the projection 46f of the rotating plate 43f by tilting,
The pinch roller 37f in the one direction is the corresponding capstan.
It is pressed against the shaft 39f. On the capstan shafts 39f and 39r described above,
Are driven by respective motors as shown in FIG.
Flywheels 48f, 48r and drive gear 49
f and 49r are respectively attached to the shafts, and their drive gears 49
f and 49r and reel shafts 50f and 50r, respectively.
Between the reel gears 51f and 51r, the shaft 45f,
The flywheels 48f and 48r are pivotally mounted on the 45r.
A transmission gear for transmitting the rotation to the reel gears 51f and 51r, respectively.
There are provided lugs 52f and 52r, and in FIG.
The transmission gears 52f at the front position correspond to the corresponding drive gears 4
9f and reel gear 51f mesh with each other, so tape
Is wound around the reel shaft 50f at the front position. Contrary to the case of FIGS. 5 and 6, FIG.
Is wound around the reel shaft 50r at the rear position
This shows a channel switching mechanism 28 which will be described later.
Causes the channel switching member 42 to move forward in the drawing.
It is done by moving. That is, the channel switching member 4
2 is moved forward by the channel switching mechanism 28 in the drawing.
When moved, the rotating plate 43f at the front position is moved to the long hole 44f.
Therefore, when the shaft 45f is pressed, the spring 4
It rotates in the counterclockwise direction against 7 and thereby the protrusion 46
f presses the bracket 38f, and the bracket 38f
Rotates clockwise and is supported by the pinch roller 37f.
The shaft 45f separates from the capstan shaft 39f
Movement of the reel causes the transmission gear 52f to move to the front position.
Separate from 51f. On the other hand, the rotating plate 43r at the rear position is
By rotating in the counterclockwise direction by the spring 47,
The protrusion 46r is separated from the bracket 38r.
Then, the bracket 38r is elastically pressed by the spring 40r,
The capstan shaft 39 to which the pinch roller 37r corresponds
The transmission gear is pressed against r and the shaft 45r moves.
52r meshes with the corresponding rear reel gear 51r
It Therefore, the tape is wound around the reel shaft 50r in the rear position.
Taken. That is, the channel switching member 42 is
The tape running direction can be changed by moving the tape toward
Be done. Next, the channel switching mechanism 28 will be described in detail.
Then, as shown in FIG. 6, FIG. 8 to FIG.
The channel switching mechanism 28 is the channel switching member.
42 is extended to the leg piece 42b and the central portion is
It has a narrow, hourglass-shaped cam hole 53, and
The end is engaged with the support piece 54 erected on the device frame 1 to move back and forth.
Plate-shaped actuating part 5 having a tongue 55 for guiding sliding in the direction
6 and two notches 57 'and 57 "in the diametrical direction
The notched gear 57 and two diametrical claw pieces
Notch gear 57 and a restraining piece 58 integral with the notch gear, and the notch gear
57 and a square piece 59 having a rounded shape,
Operation integrally provided on the notched gear 57 facing the hole 53
The pin 60 and the piece piece 50 are elastically biased to cut out the gear 57.
61 which gives an initial rotational force to the
Extending through the deformable bending portion 62,
When it is bent at a right angle and its base is pivotally attached 63,
A head having a V-shaped protrusion 64 inwardly provided at the free end
66 'and a first engaging pin 65 at the other end
The rod 66 is bent into an L shape, and the bent portion is pivotally attached 67.
And at the tip of the short piece 68a extending in the front-back direction,
The engaging recess 69 that engages with the engaging pin 65 is formed, and
At the middle position of the long piece 68b extending to the right, the restraint piece
The locking pin 70 that locks with the claw piece of 58 is diagonally attached to its tip.
A second rod 68 having a female contact portion 71, and the second rod 6
Sprung in a loaded state between the No. 8 and the first rod 66.
72 and an operating gear 73 that meshes with the cutout gear 57.
It consists of and. Now, the notched gear 57 is now half-turned and stopped.
Stop and wind the tape around the reel shaft 50f at the front position.
From the state shown in Figs.
Push the bar 3 backwards against its restoring spring 6
Then, the first half S of the pressing stroke₁Rewind by
Action pin 74 provided at an intermediate position in the longitudinal direction of the lever 3
Interact with the V-shaped protrusion 64. Shown in Figures 8 and 10
The head 66 ′ of the first rod 66 around the pivot 63.
It rotates in the counterclockwise direction and, at the same time, through the bent portion 62, the first
The rod 66 is pulled to the right in the figure, and
The second rod is engaged through the engagement between the engagement pin 65 and the engagement recess 69.
Since 68 rotates counterclockwise about the pivot 67,
The locking pin 70 is disengaged from one of the claw pieces of the restraint piece 58.
The rotation of the notch gear 57 is allowed. Therefore, the piece 59
The notch gear 57 rotates due to the elastic force of the spring 61 which is in pressure contact.
After starting the rotation, as shown in FIG.
Mesh with. The operating gear 73 is rotated by a constant drive motor.
In the drive gear 49r of the flywheel 48r being rotated
Since it is driven via the intermediate gear 75,
The gear 57 keeps rotating afterward. On the other hand, turning of the notch gear 57
Along with the rotation, the piece piece 59 integrated with the piece is attached to the spring 72.
Since the first rod 66 is pressed against it, as shown in FIG.
In addition, the engagement pin 65 provided on this is separated from the engagement recess 69.
It comes off and contacts the edge of the short piece 68a, and the second rod 68a
Is restored by the spring 72, and the locking pin 70 is
It contacts the outer periphery of the restraint piece 58. In this state, the notched gear
57 has rotated about half a turn, and at one notch 57 'position,
When the mesh with the operating gear 73 is released, as shown in FIG.
The engaging pin 70 is engaged with the other claw piece of the restraining piece 58.
Then, the rotation of the notch gear 57 is stopped. Therefore, this notched tooth
By turning the car 57 a half turn, the state of FIG. 5 and FIG.
Are alternately repeated to switch the running direction of the tape. Immediately
Then, as shown in FIG. 5, the action pin 60 has the first
Position, it contacts the inner edge of one of the cam holes 53 and
The channel switching member 42 is moved to the rear position and is also shown in FIG.
So that in the second position of the working pin 60,
The channel switching member is in contact with the other inner edge of the cam hole 53.
42 to the forward position, which allows the tape to run
The direction changes. In this example, the notch gear 57 and the
With the piece piece 59, the engagement pin 65 of the first rod 66 is
Since it is configured to separate from the recess 69 of the rod 68, rewinding
Even if the lever 3 is accidentally pressed deeply,
Half rotation of the missing gear 57 is surely regulated and correct
The channel switching operation can be guaranteed. By the way, the above-mentioned FIGS.
The first half stroke S of the pressing stroke of the return lever 3
₁Then, the action pin 74 is caused to act on the projecting piece 64, and the first rod 6
To rotate the head 66 ′ of 6 around the pivot 63.
From the above, I explained the case of switching channels,
In the present application, the rewind lever 3 is pressed further deeply
Second half stroke S₂The head plate 27
Retract to the play position, capstan shaft 39f, 39
Release the pressure contact between r and the pinch rollers 37f and 37r,
The load acting on the loop to fast forward the magnetic tape.
The mechanism 29 is provided. This fast-forwarding mechanism is shown in FIGS.
FIG. 12 shows the unwinding state of the rewinding lever 3.
FIG. 13 shows the rewind lever 3 with the first half stroke S.₁
Fig. 14 shows the condition of the rewinding lever when it has been pressed fully.
Second half stroke S₂The state of pressing is shown respectively.
This fast-forward mechanism 29 is located at the rear end position of the rewind lever 3.
In addition, the head plate 27 is attached to the pivot 77 that is erected on the vessel frame 1.
The free end portion on the rising rib 27 'provided on the side edge of the base portion 27a of the
Abutting piece 78 which abuts against the free end of the rewinding lever 3.
The tongue 80 with which the tip of the protrusion 79 provided at the rear end abuts
The pivoting piece 81 having the same is integrally provided. Then, as shown in FIG.
The plate 27 advances to the play position and the fast forward lever
-2 and the rewind lever 3 from the non-pressed state, rewind lever
When pressing -3 against the restoring spring 6, the first half
Stroke S₁As shown in FIG.
The pin 74 acts on the protrusion 64, and in this state,
The channel is changed like a solid and rewind
The leading edge of the protruding portion 79 provided on the lever 3 is the tongue of the rotating piece 81.
Slight contact with strip 80. Then the latter half stroke S₂
In, since the protrusion 79 presses the tongue 80,
The rotating piece 81 and the abutting piece 78 are integrated as shown in FIG.
It rotates in the clockwise direction, and the contact piece 78 moves to the head plate 27.
Press the rising rib of and move it in the non-play direction.
It Then, the locking pieces 41f and 41r are respectively attached to the bracket 3
The brackets 38f and 38r are engaged with the brackets 8f and 38r.
Is a pinch roller 37 against the springs 40f and 40r.
f, 37r and capstan shafts 39f, 39r are separated from each other.
Rotate in the opposite direction to change from the state shown in FIG. 7 to the state shown in FIG.
The load shown on the tape disappears and the load acting on the tape disappears.
Therefore, the tape is fast-forwarded in the direction in which the channel is switched.
To be done. The above is by pressing the rewinding lever 3.
The first half stroke S₁Channel switching operation by
And then the latter half stroke S₂Due to
Reverse the tape by retracting the plate 27 in the non-play direction.
I described in detail the case of fast-forwarding in the direction.
Without changing the line direction, in the state shown in Fig. 5,
If you want to fast-forward the
Press against ring 5. The fast forward lever 2 is used for rewinding.
Unlike the case of bar 3, it is necessary to perform channel switching operation
, The channel mechanism shown in FIGS.
A work which works with the protrusion 64 of the head 66 ′ of the first rod 66 of 28
The pin 74 is omitted, and the rear end is
The protrusion 82 having the same structure as the protrusion 79 is integrally provided,
Therefore, the fast-forward lever 2 is pressed against the spring 5.
And the leading edge of the protruding portion 82 presses the tongue piece 80,
The moving piece 81 and the contact piece 78 integrally rotate in the counterclockwise direction.
The head plate 27 is not played.
The tape is fast forwarded. This state is the 16th
It is shown in the figure. By the way, in the above, the fast-forward lever 2
Push the rewind lever 3 against the restoring springs 5 to 6.
You can keep pressing them, but you can lock them for operation.
Is preferred, and a locking mechanism therefor is provided in
This is shown in FIGS. That is, 83 and 84 are of the device frame 1.
The lateral movement is performed at the front position through the engagement of the pin 85 and the long hole 86.
First and second slide plates that are present and are in a superposed state
At each end of the fast-forward lever 2 and the rewind
The first slide plate 8 extends to the position of the lever 3.
3 extended end piece 83 ', fast forward lever 2 provided
And engages with the engaging piece 87 to guide the movement in the front-rear direction.
At the same time, the front end portion acts on the engaging piece 87 to generate lateral power.
The inclined edge 89a that gives the
Engagement portion 8 that engages with the engagement piece 87 in the pressed state of
Provided in the guide groove 89 each having 9b and the rewind lever 3
And engages with the engaging piece 88 to guide the movement in the front-back direction.
At the same time, the front end portion acts on the engaging piece 88 to generate lateral power.
The slanting edge 90a which gives the rewind lever to the rear end.
Engagement portion 9 that engages with the engagement piece 88 in the pressed state of -3
And a guide groove 90 having 0b are arranged side by side, and
The plate 83 is constantly spring-loaded by the engagement piece 87 and the spring 91.
And 88 are elastically pressed in the direction in which they engage with the engaging portions 89b and 90b.
Is biased, and the other end of the first slide plate 83 is
Push the eject lever 4 against its spring 7.
When this happens, the first slide plate 83 is moved by
A tongue piece 92 that presses against the spring 91 is integrally provided.
There is a mark. Further, the second slide plate 84 is a rewind lever.
-Restrict the pressing of lever 3 and move both levers 2 and 3
A member for restraining movement, which is an extended end piece 8
4 ', the fast-forward lever 2 is pressed and the engaging piece 87 is
Until the engaging portion 89b of the guide groove 89 is engaged, the engaging piece
The inclined edge 93 that continues to operate with 87 and the engagement piece 87 are
With the engaging portion 89b of the guide groove 89 engaged, the rewind lever
When the bar 3 is pressed, the pressing of the rewind lever 3
First half stroke S₁Shorter stroke S₃Length tolerance
However, the blocking piece 94 that blocks further strokes
And the second slide 84 is always
The elastic force is applied in the same direction as the first slide plate 83 by the ring 95.
Has been done. Then, as shown in FIG. 12, fast forward
Both the lever 2 and the rewinding lever 3 are in the non-pressed position
From the state, push the fast-forward lever 2 against its spring 5.
When pushed, the engaging piece 87 first acts on the inclined edge 89a.
Then, following this, it acts on the inclined edge 93, and
Both ride plates 83 and 84 are springs 91 and 95, respectively.
Laterally to the right in the figure against the
When engaged, the engaging piece 87 engages as shown in FIG.
When the first slide plate 83 is restored by engaging with the portion 89b
In both cases, the fast-forward lever 2 is locked in the pressed state, and
When the second slide plate 84 is held in its laterally moving state,
In addition, the blocking piece 94 laterally crosses the guide groove 90 on the rewind lever 3 side.
It is cut and placed in a state of facing the engagement piece 88. This state
To release the fast-forward lever 2 from the locked state.
When the bar 3 is pressed against its spring 6, the lever 3
-3, as shown in FIG.
First half stroke S₁Shorter stroke length tolerance
As a result of the stroke, the engagement piece 88 is tilted in the opposite direction.
It acts on the beveled edge 90a to move the first slide plate 83
Lateral movement against pulling 91
The engaging piece 87 of the feed lever 2 is disengaged from the engaging portion 89b.
The lever 2 is restored. On the other hand, the engaging piece 8 of the rewind lever 3
8 does not engage with the engaging portion 90b, and the first
As shown in FIG. 8, the action pin 74 is the protruding piece of the first rod 66.
The rewind lever 3 pushes its push without acting with 64.
Restore by solving the operation. From the state shown in FIG. 12, the rewind lever is
When the -3 is pressed, the engaging pieces 88 are inclined so as to face each other.
By acting on the edge 90b, the first slide plate 83 is
Lateral movement against the ring 91 causes the engagement piece 88 to move to the blocking piece 94.
Without moving, it moves forward to engage with the engaging portion 90b,
The rewind lever 3 is rotated in the pressed state as shown in FIG.
Be locked. Then, from this state, move the fast-forward lever 2
When pressed, the engaging piece 87 and the inclined edge 89a face each other.
The first slide plate 83 is acted upon by a slight stroke.
Of the rewinding lever 3, the engaging piece 87 of the rewinding lever 3 is engaged.
The lever 3 is restored by being released from the portion 90b. Further, from the state shown in FIG.
Therefore, the fast forward lever 2 and the rewind lever 3 are pressed simultaneously.
When made, as shown in FIG. 19, both levers 2, 3
Engaging pieces 87, 88 provided on the
a, 90a, the engaging piece 87 and the second slide
By the action of the inclined edge 93 of the plate 84, the second slide plate 8
4 tries to move laterally, but for the lateral movement, the blocking piece 94
The edge of the press contact the side surface of the engaging piece 88 of the rewinding lever 3.
It is prevented by engaging the rewind lever 3
The piece 88 is formed between the edge of the blocking piece 94 and the side edge of the guide groove 90.
It is pinched between them and its forward movement is blocked. That is, fast forward
It is impossible to press the bar 2 and the rewind lever 3 at the same time.
The failure prevents the failure from being triggered. Still above
In the description, the lock of the fast forward lever 2 and the rewind lever 3
If ejected, press eject 4 to eject cassette C.
It can also be released when pressure is applied. This is
Object 4 is pressed, and this causes the tongue piece 9 of the first slide plate 83.
2 and the first slide plate 83 causes the spring 9
It is performed when the robot moves sideways against 1. [0027] As described above, according to the present application, the channel is
Push the operating lever for both switching and rewinding,
The state of the pressing operation is long regardless of the rotation of the notch gear.
Even if it continues for a long time, using the rotation of the notch gear,
The second rod is locked to the restraint piece by the piece piece integrated with this.
Since it is configured to forcibly operate in the direction,
There is no fear of malfunction that replacement
It has the advantage that a highly reliable product can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS [FIG. 1] Overall plan view of non-play state [FIG. 2] Overall side view of non-play state [FIG. 3] Overall plan view of play state [FIG. 4] Overall side view of play state [FIG. 5 is a plan view in which a part of the playing state is omitted. FIG. 6 is a plan view in which a part of FIG. 5 is further omitted. FIG. 7 is a plan view corresponding to FIG. 5 in which the tape running direction is different. FIG. 9 is a partial plan view showing a channel switching operation. FIG. 11 is a partial plan view showing a channel switching operation. FIG. 12 is a partial plan view showing a channel switching operation. ] Partial plan view showing fast-forward operation [Fig. 13] Partial plan view showing fast-forward operation [Fig. 14] Partial plan view showing fast-forward operation [Fig. 15] Plan view after channel switching operation corresponding to Fig. 7 [Fig. 16] Plan view of fast-forward operation [Fig. 17] Lock Partial plan view showing the operation of the mechanism [Fig. 18] Partial plan view showing the operation of the lock mechanism [Fig. 19] Partial plan view showing the operation of the lock mechanism [Description of symbols] 1 Instrument frame 2 Fast-forward lever 3 Rewind lever 27 Head plate 28 Channel switching mechanism 42 Channel switching member 57 Notch gear 58 Restraint piece 59 Piece piece 60 Action pin 61 Spring 62 Bent portion 64 Protrusion 65 Engagement pin 66 First rod 68 Second rod 69 Engagement recess 72 Spring

Claims (1)

Claims: (1) A channel switching mechanism includes a cutout gear that operates a channel switching member, a restraining piece that is integral with the cutout gear, and a biasing piece that applies an initial rotational force to the cutout gear. A first rod that rotates in response to the pressing force of the operating lever against the automatic restoring force, and a member that interlocks with the first rod, and is always engaged with the restraining piece. A second rod which is stopped and restrains its rotation, and which, when the first rod rotates in response to a pressing operation of the operation lever, operates in a direction to release the engagement with the restraining piece; The cutout gear is provided integrally with the cutout gear. When the cutout gear is stopped, the cutout gear does not act on the first rod, but when it rotates, the cutout gear acts on the first rod to lock the second rod with the restraining piece. A cassette tape player, comprising: a piece piece that operates in the direction of (2) The base of the first rod is rotatably attached to the vessel frame,
The free end portion extends in a right angle direction through a bendable portion that is deformable so as to generate an urging force from a rotatable head having a V-shaped protrusion that acts on the operation lever, and at its tip end. It has an engaging pin, the second rod is bent in an L shape, the bent portion is rotatably pivotally attached, and one piece extends in parallel with the first rod and the middle thereof. A locking pin that locks with the restraint piece is provided at a position, and an engaging recess that can be engaged with and disengaged from the engaging pin is provided at the tip of the other piece that extends so as to intersect the first rod at a right angle. And a piece piece having a non-acting surface and an acting surface with respect to the first rod, and a spring is stretched between the first rod and one piece of the second rod to be interlockable. As the engaging pin engages with the engaging recess and the engaging pin engages with the restraining piece while the non-operating surface of the piece is the first When the heads of the first rods are rotated, the locking pins are separated from the restraint pieces, and the notch gears are rotated, the action surface of the piece piece acts on the first rods. A cassette tape player according to claim 1. (3) The cassette tape player according to claim 1 or 2, wherein the operation lever is a channel switching lever or a rewind / combined lever.