JPS60143468A - Transport of reverse-type tape recorder - Google Patents

Abstract

PURPOSE:To allow simplification of a mechanism and its miniaturization by dislocating a cycle stop lever to the nonoperation position by the operation of a mode switching operation lever, and executing continuous reproduction of a tape. CONSTITUTION:A transport is possible to reproduce continuously by locking a mode switching operation lever 11 to the operation position. In other words, when the mode switching operation lever 11 is operated with pressure and it is locked at the operation position, a cycle stop lever lock piece 39 of the operation lever 11 is abutted on an abutting pin 41 of a cycle stop lever 30, lock fixing is executed in the condition that the cycle stop lever 30 is rotated and dislocated around a pivotally supporting pin 29 in the clockwise direction, and connection abutting of the first and the second guiding surfaces 45 and 46, and an abutting pin 43 of a switching lever 42 is prevented. Thus, a tape 4 does not receive the traveling stop operation by the cycle stop lever 30, and continuous endless reproduction is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a transport for a reverse type tape recorder capable of continuous reciprocating playback. .

(Prior art) In general, in the transport of this type of tape recorder, various operations such as recording, playback, direction switching, fast forwarding, rewinding, and stopping can be performed by pressing operation buttons on the panel surface of the tape deck. Furthermore, continuous reciprocating playback can be performed by pressing a mode switching button.

By the way, in most conventional devices, the continuous reciprocating reproducing operation between the 7-word direction and the reverse direction and the switching between the automatic stop operation were electrically controlled. However, in this case, means for sending operation signals for each of the above-mentioned operations, an electric plunger, etc. are required, which increases costs, complicates the mechanism, and makes it difficult to downsize the mechanism. There are drawbacks such as:

(Objective) The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional art, and enables the continuous reciprocating reproducing operation in the 7-ward direction and the reverse direction to be performed entirely mechanically, thereby simplifying the mechanism.
The purpose is to enable miniaturization and reduce manufacturing costs.

(Example) Hereinafter, the present invention will be described in detail based on an example shown in the drawings. FIG. 1 schematically shows a reverse type cheap recorder incorporating an example of the transport according to the present invention.
A, 2b and pinch rollers 3a, 3b are provided in pairs on the left and right, and both capstans 2a, 2b rotate in opposite directions, and when changing the direction of the tape 4, one pinch roller 3a or 3b rotates. It is designed to be crimped onto one of the capstans 2a or 2b with the tape 4 in between.

(A) Structure of the main part of the transport in this example Figures 2 and 3 show the stop mode state, and in this tape recorder 1, there are stops and fast forwards at multiple operation windows on the panel board (not shown). , pushbutton operation buttons (not shown) for rewinding, rewinding, playing, recording, direction switching, and mode switching are provided individually, and one or two of the buttons can be pressed. This allows recording, playback, direction switching, etc.

Each of the above buttons is attached to the front end of the corresponding operating lever 5-11. In FIG. 2, each working lever 5. A fast forward operation lever 6, a rewind operation lever 7, a playback operation lever 8, a recording operation lever 9, a direction switching operation lever 10, and a mode switching operation lever 11 are arranged in parallel. The mode switching operation lever 11 is arranged at a position apart from other operation levers. Each of the operating levers 5 to 11 is made of a flat plate formed into a desired shape, and is suspended between the levers 15 and the main chassis 13 through a long hole 12 made transparent at an appropriate location. ... are each pulled forward, that is, in the direction of the non-operating position. The stop operation lever 5 to the recording operation lever 9 each have a lock pin 16.
16... are opened in the lock plate 17 through the engagement windows 18a~
18e.

(i) Structure of lock plate 17 This lock plate 17 consists of a horizontally long flat plate arranged perpendicularly to each of the operating levers 5 to 9. For example, the right end portion contacts a power switch 21 disposed on the right side of the lock plate 17, and the power switch 21 is turned on. It is designed to be turned on and off, and the main chassis 1
To the left by the tension spring 22 suspended between the
That is, it is pulled and biased in the direction away from the power switch 21. Each of the engagement windows 18b to 18e of the stop/operation lever 5, other than the lock pin engagement window 1'8a, has four lock pin engagement parts 23 at the rear end thereof, each of which holds each lock pin 16 in the operating position. Further, the engagement window 18a of the stop operation lever 5 is connected to the lock pin 1 of the lever 5.
It has an inclined guide surface 24 that guides and guides 6. Furthermore, the engagement window 18e of the recording operation lever 9 has a notch opening 25 on the left side.
It is formed by extending it. The rear part of this notch opening 25 is a rectangular recessed part 26, and a lock release folding piece 27 is formed in this recessed part 26 by bending it upward in FIG. A cycle stop lever 30 is rotatably supported via a pivot pin 29 disposed at the tip of the bracket 28 near one side.

(11) Structure of each operation lever The stop operation lever 5, the fast-forward operation lever 6, and the rewind operation lever 7 each have the same configuration, and are made of a rectangular flat plate having a hooking pin for a tension spring 15 at the rear end.
As described above, it has the elongated hole 12 and the lock pin 16.

The playback operation lever 8 includes all the components of the operation levers 5 to 7 described above, and also includes a contact portion 31 with the recording operation lever 9 and a bent contact portion 32 with the cycle stop lever 30 at two locations at the rear, front and rear. The latch release lever 33 is provided with an L-shaped abutment piece 34 that protrudes leftward and has an abutment surface with the latch release lever 33 at its rear end.

Like the playback operation lever 8, the recording operation lever 9 includes all the components of the stop operation lever 5, etc., and also has an actuation piece 35 that comes into contact with the contact portion 31 of the playback operation lever 8 on the right side when pressed. and a lock release prevention piece 3 protruding from the
6 is installed protrudingly. The direction switching operation lever 10 is an end face of a cam lock arm actuation piece 37 that is bent sharply to the right from the rear end of a flat strip having a long hole 12 similar to the above-mentioned operation levers and a hook pin for a tension spring 15. comes into contact with the cam lock arm 38 as a response mechanism to operate it. The direction switching operation lever 10 is prevented from being depressed unless the regeneration operation lever 8 is pressed in the direction of the operation position by a blocking lever (not shown). The mode switching operation lever 11 has an elongated hole 12 and an engaging pin with a tension pin 15, and a cycle stop lever lock piece 39 bent at right angles from the rear end to the right.
has been extended. In addition, this mode switching lever 1
1 is in a locked state when pressed once by a locking mechanism (not shown), and is unlocked when pressed again.

(iii) Structure of the cycle stop lever 30 The cycle stop lever 30, which is rotatably supported on the lock plate 17, temporarily stops the tape drive when switching the tape running direction during playback. A tension spring 40 suspended between
In the stop mode, the right end portion abuts against the bending abutting portion 32 of the regeneration operation lever 8, thereby restricting the rotation. Furthermore, a contact pin 41 is provided protruding from the tip of the mode switching operation lever 11 so as to be able to come into contact with and separate from the operating piece 39 of the mode switching operation lever 11 . Further, on the left front side of the pivot pin 29, there is an arcuate guide surface 44 that contacts the abutting pin 43 of the switching lever 42, and a first guide surface 44 that contacts the abutment pin 43 of the switching lever 42, and a first guide surface 44 that is arranged orthogonally to each other at the left end. Second guide surface 45.
46 are formed respectively.

(iv) Structure of the switching lever 42 As shown in FIG. 1, the switching lever 42 connects the pinch rollers 3a and 3b to the respective capstans 2a.

2b to select either constant speed feed of 7 degrees or reverse, and is supported on the main chassis 13 so as to be able to reciprocate from side to side. The abutment pin 43 is erected at the tip of an engagement piece 47 extending rearward from the left end, and in the stop mode, the engagement piece 47 engages the crotch in front of the reverse operation lever 48. 49.

(v) Structure of the latch release lever 33 and its surroundings The latch release lever 33, which serves as a response mechanism, consists of a rectangular flat plate that is long in the front and back.
a is placed on a tension spring 5o suspended between the main chassis 13 and the contact piece 34 of the regeneration lever 8 so as to be closely opposed to it. is biased forward. As shown in FIG. 3, the right half of the rear end is in sliding contact with a latch plate bin 51 as a response mechanism.
1 and the inclined guide surface 52a for vertically moving the guide surface 5.
A planar land 52b connected from the top of the rear end of 2a.
are formed integrally with each other.

As shown in FIG. 4, this latch plate bin 51 has engaging pieces 51a and 5'lb bent downward at the left and right ends, respectively, and supports 53 disposed on the left and right sides of the latch release lever 33. The left-end engagement piece 51a extends between the engagement guide hole 55 of the cam lock arm 38 and the large-diameter spring receiving part S3 attached to the upper end of the support part 53.
A and the latch plate bin 51 are biased downward by a compression spring 56 interposed therebetween.

(Vi) Structure of Reverse Operation Lever 48 The reverse operation lever 48 is formed in the shape of a bell crank, and its bent portion is rotatably supported on a support shaft 57 erected on the main chassis 13. Bifurcated engaging part 49.5
8 respectively. Of these, the rear-end bifurcated engagement portion 58 is slightly bent in the middle thereof, and is constantly engaged with an engagement pin 60 protruding from the upper surface of the cam gear 59. Further, the left end side outer end surface 49 of the front end bifurcated engagement portion 49
a is in contact with the right side surface of the rear end of the release connection lever 61 so as to be able to come into contact with and separate from it.

(vii) Structure of the cam lock arm 38 and its surroundings The cam lock arm 38 is rotatably supported on a support shaft 62 erected on the main chassis 13 at a bent portion of a flat plate formed in a hook shape. The tension spring 63 suspended between the right end of the arm 38 and the main chassis 13 rotates counterclockwise, and the main chassis 13 is rotated between the latch release lever 33 and
Rotation is restricted by a rotation restriction shaft 64 that is vertically provided. At the rear end of this cam lock arm 38 is an engagement hole 55 in which the latch plate pin 51 described above is removably engaged.
is formed in a circumferential manner, and an operating piece 65 is formed extending to the right near the rear of the support shaft 62, and an engagement lock holder 66 is provided at the tip of this operating piece 65 to protrude downward. be. Further, a long lock connecting rod 67 is hooked to the left and right behind the support shaft 62 of the cam lock arm 38, and the lock connecting rod 67 is connected to guide members 68, 68 disposed at the front and rear of the intermediate portion. Cam lock arm 38 in a pinched state
It reciprocates left and right as the sensor lever 69 rotates, and a bent abutment part 71 is formed at the tip of the abutment pin 70 of the sensor lever 69 so as to be able to come into contact with and separate from the abutment pin 70 of the sensor lever 69.

(viii) Composition of Cam Gear 59 and Its Surroundings The cam gear 59 has its rotating shaft 72 rotatably supported on the main chassis 13, and is a toothless portion having teeth missing by a certain angle at symmetrical positions with respect to the rotating shaft 72. 3a and 73b, and the engagement protrusion 74a+7.4b that engages with the engagement lock protrusion 66 of the cam lock arm 38 is the toothless portion 73a,
It protrudes downward at a position shifted by a certain phase from 73b, and is biased to rotate counterclockwise by a spring (not shown). The cam gear 59 meshes with the drive gear 75 so as to be driven intermittently. Similar to the cam gear 59, the drive gear 75 has a rotary drive shaft 76 connected to the main chassis 13.
It is rotatably supported on a shaft, and is interlocked and connected to a motor 77 via a power transmission means (not shown).

(ix) Configuration of the release connection lever 61 and its surroundings The release connection lever 61 consists of a longitudinally long rectangular flat plate rotatably supported on a support shaft 78 erected from the main chassis 13. It has a pivot shaft 80 that rotatably supports the recording release lever 79, and an abutment pin 81 that contacts the left end surface of the lock plate 17 on the right side of the pivot shaft 80 so as to be able to come into contact with and separate from the left end surface of the lock plate 17.
It is installed protrudingly. The recording release lever 79 is arranged in a direction perpendicular to the release connection lever 61 in the stop mode state, and is rotated counterclockwise by a tension spring 82 suspended between its left end and the main chassis 13. The contact pin 83 protruding from the right end passes through the notch opening 25 of the lock plate 17 and comes into contact with the lock release prevention piece 36 of the recording operation lever 9 so as to be able to come into contact with and separate from it, and one end surface of the notch opening 25 The engaging piece 8'4 that engages with is formed by bending.

(x) Structure of the sensor lever 69 and its surroundings The sensor lever 69 is rotatably supported on a support shaft 85 erected on the main chassis 13 at a bent part of a flat plate formed in an inverted letter shape. An operating piece 86 is formed extending leftward from the front-rear intermediate portion of the lever 69, and a cam 7 lower 87 is fixed to the tip of this operating piece 86. Further, the aforementioned semicircular recessed portion 88 is formed on the rear end surface of the left end of the lever 69, and the abutting pin 70 that comes into contact with the aforementioned abutting portion 71 of the lock connecting rod 67 is protruded from the rear end. It is. In the stop mode, the cam 7 lower 87 abuts the second cam 90 of the cam member 92 having a plurality of cams 89, 90, 91, and the semicircular recess 88 is always in contact with the pivot point of the take-up reel stand 93. It is set at a position surrounding the front of the support shaft 94. The cam member 92 has a rotating shaft 95 rotatably supported on the main chassis 13, and has a gear 96 at the upper end.
on the lower surface side of this gear 96. The second cam 90 and the third cam 91 each have tapered straight portions 89a and 89b extending from both ends of a circular arc portion 89a concentric with the rotating shaft 95, and the second cam 90 is concentric with the rotating shaft 95. 95 is an arcuate cam integrally attached to the third
The cam 91 is arranged at a position apart from the rotating shaft 95, and its arcuate outer circumferential surface is in sliding contact with the cam 7 lower 87. The take-up reel stand 93 includes a receiving plate (not shown) attached to its lower end, a reel gear 97, and a slip plate 98. The force is transmitted to the slip plate 98 by the spring bias of an installed compression spring (not shown). The slip plate 98 has an arcuate portion 100 concentric with the pivot shaft 94 extending from both sides of one end of the bracket 99 having a fitting portion with the pivot shaft 94, and the sensor is attached to both ends of the lower surface of the arcuate portion 100. Suppressing protrusions 102 and 102 are protrudingly provided to press and abut against abutment surfaces 101, 101 formed on the left and right sides of the rear end of the semicircular recessed portion 88 of the lever 69.

Next, the operation of the above structure will be explained with reference to FIG. 2 and FIGS. 5 to 38.

(a) Stop mode (see FIGS. 2 and 4) In the stop mode, each component is positioned as described above. In other words, each of the operating levers 5 to 11 is in the non-operating position, and the right end pressing portion 17a of the lock plate 17 is held in position by the tension spring 22 at a position away from the power switch 21. Motor 77 electrically connected to 21 is stopped.

(b) Mode switching from stop mode to 7-ward mode (see Figures 5 and 6) In the stop mode, when the regeneration operation lever 8 is pressed backward, the lock bin 16 is moved from the lock bin engaging section 2.
3, the regeneration operation lever 8 is held in the operating position, and the lock plate 17 moves in parallel to the right, so that the switch pressing part 17a of the lock plate 17 comes into pressure contact with the power switch 21. Turn on the power switch 21 and turn on the motor 7.
Drive 7. At the same time, the head stand (not shown) on which the magnetic head is attached is moved in conjunction with the playback operation lever 8 to a position where the magnetic head is in contact with the tape 4, and the tape drive mechanism (not shown) is moved to a constant tape speed. It has been converted to a sending state.

On the other hand, at this time, as the regeneration operation lever 8 moves rearward, the latch release lever 33 moves rearward, and the latch plate bin 51 is guided by the inclined guide surface 52a and descends, as shown in FIG. As such, the latch plate pin 51
The right side engagement piece 51b is connected to the engagement hole 5 of the cam lock arm 38.
5, and is engaged and held by a compression spring 56. As a result, the cam lock arm 38
is fixed, so the engagement lock protrusion 66 of the cam lock arm 38 engages with one engagement protrusion 74a of the cam gear 59 to rotationally lock the cam gear 59. In this state, one toothless portion 73a of the cam gear 59 faces the drive gear 75, so both gears 59 and 75 are not meshed.
Therefore, the cam gear 59 is kept stopped. That is,
This state is a 7-word playback state.

(C) Switching from forward mode to reverse mode (see Figures 7 to 10) In the 7-word playback state, when the right switching lever 10 is pressed, the mode switches from 7-word mode to reverse mode. . That is, when the direction switching operating lever 10 is pressed, the cam lock arm 38 is rotated by a predetermined angle clockwise around the support shaft 62 by the cam lock arm operating piece 37 of the operating lever 10. As a result, the right side engagement piece 51b of the latch plate pin 51 comes off the right side engagement part 55a and is guided to the rear part of the engagement guide hole 55. And the engagement lock protrusion 6
6 and one of the engagement protrusions 74a are disengaged, the cam gear 59 is urged by a spring (not shown), rotates counterclockwise, and meshes with the drive gear 75.
5 and the other missing tooth? It is rotated until it reaches 3b. As the cam gear 59 rotates, the reverse operation lever 48, which is engaged with the engagement pin 60 of the drive gear 75, rotates clockwise around the support shaft 58.
A cutout that engages with the front end bifurcated engagement portion 49 of the operating lever 48.
The switching lever 42 is moved to the left, and as it moves away from the forward side capstan 2a,
The reverse side pinch roller 3b comes into pressure contact with the tape 4, resulting in a reverse playback state. Also, cycle stop lever 3
0 is restricted from rotating by the bending contact portion 32 of the regeneration operation lever 8, and in the forward regeneration state, the contact pin 43 of the switching lever 42 comes into contact with the arcuate guide surface 44, and gradually moves up to the first guide surface 45. The forward movement of the tape 4 is temporarily stopped.

9 and 10 show the reverse regeneration state, and when the suppressing operation of the direction switching operation lever 10 is released, the cam lock arm 38 is rotated counterclockwise by the biasing force of the tension spring 63, and accordingly Thus, the latch plate pin 51 engages with the left engaging portion 55b of the engagement guide hole 55, prevents the cam lock arm 38 from rotating, and fixes the cam lock arm 38. Then, cam gear 5
The other engagement protrusion 74b of 9 is locked by the engagement lock protrusion 66, and at the same time the other toothless portion 73b is stopped. As the cam gear 59 stops engaging, the reverse operation lever 48 is also locked at the position shown in FIG. 9. Further, the switching lever 42 locked to the front end bifurcated engagement portion 49 is also fixed at the reverse playback position, and as a result, the abutment pin 43 of the switching lever 42 is moved from the first guide surface 45 of the cycle stop lever 30 to the second The tape 4 moves to the guide surface 46, and the tape 4 is moved in the reverse direction by displacement of the cycle stop lever 30, thereby causing the tape to run at a constant speed in a reverse playback state. As will be described later in section (e), switching from the 7-word mode to the reverse mode can also be performed using an end detection mechanism at the trailing end of the tape when the tape is running at a constant speed.

(d) Switching from reverse mode to stop mode (see Figures 11 and 12) If the stop operation lever 5 is depressed from the reverse playback state, the stop mode will be entered, or the regeneration operation lever 8 will be suppressed after that. When you operate it, it always plays forward. First, when the stop operation lever 5 is pressed, the lock pin 16 of this presses into contact with the inclined guide surface 24 of the lock plate 17 and moves the lock plate 17 to the right. and the lock pin engaging portions 23 are unlocked, and the regeneration operating lever 8 is returned to the non-operating position. Along with this return operation of the regeneration lever 8, the latch release lever 33 returns to the non-operating position, and the latch plate pin 51 rides on the land 52b again, causing the latch plate pin to move as shown in FIG. Right side engagement piece 5 of 51
1b and the left engagement portion 55b of the engagement guide hole 55 are disengaged. As a result, the cam lock arm 38 rotates back in the counterclockwise direction until it contacts the rotation regulating shaft 64 by the tension spring 63, and the engagement lock protrusion 66 of the cam lock arm 38 and the engagement protrusion of the other five cam gears ? 4b is unlocked. The cam gear 59 rotates counterclockwise by a certain angle and meshes with the drive gear 75 again, and the gear 75 locks one engagement protrusion 74a to the engagement lock protrusion 66. - direction, and as a result, it is rotated counterclockwise until one toothless portion 73a is locked with the engagement lock protrusion 66 again, and one toothless portion 73a faces the drive gear 75 again. This rotation of the cam gear 59 also causes the reverse operation lever 48 to rotate counterclockwise, and as the cam gear 59 is locked, the rotation is locked again. That is, the locked position of the cam gear 59 at this time is the stop mode and the 7-ward mode. Then, as the reverse operation lever 48 rotates, the switching lever 42 moves to the right and returns to the forward playback position. As a result, the reverse side pinch roller 3I) moves away from the same side capstan 2a, and the seventh backward side pinch roller 3b moves toward the same side capstan 2a. However, since the playback operation lever 8 is unlocked at this time, the head stand has returned to the non-playback position, and the tape 4
is not run.

Further, as the stop lever 5 is returned to the non-operating position, the lock plate 17 is also returned to the stop mode position, so the power switch 21 is turned off and the motor 77 is stopped. Note that the power switch 21 is adjusted so that the motor 77 stops after the cam gear 59 stops rotating. In this way, the cam gear 59 always maintains the same locked position as in the forward mode in the stop mode, and as a result, when the regeneration operating lever 8 is operated to suppress it, 7-word regeneration is always performed. Note that the switching operation from the reverse mode to the stop mode can also be performed by an end detection mechanism at the end of the tape when the tape 4 is running at a constant speed in reverse.

(E) Switching from the 7-word mode to the reverse mode using the end detection mechanism (see FIGS. 13 and 14).

In the forward playback state shown in FIG. 5, when the tape 4 is completely unwound onto the reel (not shown) of the take-up reel stand 93 and reaches the end of the tape, the tape 4 and the take-up reel stand 93 are moved to the play idler. (not shown) rotates, a slip roller (not shown) slips and stops rotating.

Along with this, the leftward ρ pressing of the slip plate 98 J, 31
02 stops in contact with the contact surface 101 of the sensor lever 69. Then, the sensor lever 69 temporarily stops rotating in the clockwise direction when the cam 7 lower 87 reaches the maximum diameter portion of the second cam 90.

Then, as shown in FIG. 13, the cam member 92 rotates counterclockwise, and the cam 7 lower 87 comes into sliding contact with the third cam 91. According to this, the sensor lever 6
9 gradually begins to rotate clockwise, moving the lock connecting rod 67 in contact with the ridge pin 70 to the right. As a result, the cam lock arm 38 rotates clockwise, and the right engaging piece 5 of the latch plate pin 51
1b moves inside the engagement guide hole 55 toward the left engagement portion 55b. When the cam 7 roller 787 approaches the maximum diameter part of the third cam 91, the engagement lock projection 66 of the cam lock arm 38 and one engagement projection 74a of the cam gear 59 are unlocked, and the cam gear 59 is moved by the spring. It rotates counterclockwise, meshes with the drive gear 75, and further rotates counterclockwise. In conjunction with this, the reverse operation lever 48 rotates clockwise, moving the switching lever 42 to the left. At this time, the pinch roller 3a in the forward playback state moves away from the capstan 2a, and at the same time, the pinch roller 3b in the reverse playback state approaches the capstan 2b. And lock plate 1
7 is moved to the right, the rotation of the cycle stop lever 30 is restricted by the abutting portion 31 of the regeneration operation lever 8, and as the switching lever 42 is moved to the left, the abutting pin 43 of the cycle stop lever 30 is rotated in a circular motion. The arcuate guide surface 44 gradually slides into contact with the first guide surface 45, and once the tape 4 stops traveling in the forward direction. Further, when the cam 7 oro 787 reaches the maximum diameter end of the third cam 91, the sensor lever 69 rotates clockwise to the maximum, and the lock connecting rod 67 rotates the cam lock arm 38 clockwise to the maximum. Displace.

Thereafter, when the cam 7 lower 87 passes the maximum diameter end of the third cam 91, the sensor lever 69 is rotated counterclockwise, and the cam lock arm 38 is slightly rotated counterclockwise again. .

Therefore, the latch plate pin 51 is engaged and locked to the left engagement portion 55b along the engagement guide hole 55 of the cam lock arm 38. As a result, the engagement protrusion 7 of the cam gear 59
4b is rotationally locked by the engagement lock protrusion 66. Note that at this time, since the other toothless portion 73b faces the drive gear 75, the cam gear 59 is held stopped. The locked position of the cam gear 59 at this time is the reverse mode; J state.

Further, the reverse operation lever 48 is also locked by the cam gear 59 being locked as described above, and the switching lever 42 that is engaged with the front end bifurcated engaging portion 49 is connected to the reverse side pinch roller 3b by the tape attached to the capstan 2b. 4
The tape is held in a press-contact state between the tapes, and the tape runs at a constant speed in the reverse state. Therefore, at this time, the contact pin 43 of the switching lever 42
and displaces the cycle stop lever 30 to the tape running state.

(To) When the direction switching lever is suppressed from the reverse mode (see FIGS. 15 and 16) When the direction switching lever 10 is suppressed from the reverse playback state shown in FIG. 9, the cam lock arm of the operating lever 10 Since the cam lock arm 38 is rotated clockwise by the actuating piece 37, the latch plate pin 51, which was engaged and locked in the left engagement portion 55b, is moved into the engagement guide hole 5.
5 in a clockwise direction. Next, when the pressing operation of the direction switching operation lever 10 is released, the cam lock arm 38 is rotated counterclockwise by the tension spring 63, thereby locking the latch plate pin 51 to the right side engaging portion 55b. Ru. Further, the engagement lock protrusion 66 is disengaged from the other engagement protrusion 74b, and the cam gear 59 is rotated counterclockwise by the spring to mesh with the drive gear 75, and the cam gear 59 is further rotated counterclockwise by the gear 75. It is rotationally driven. As the cam gear 59 rotates, the reverse operation lever 48 is rotated counterclockwise, and the switching lever 42 is moved to the right. At this time,
The reverse side pinch roller 3b moves away from the capstan 2b, and at the same time, the seventh backward side pinch roller 3a approaches the capstan 2a.

Since the contact pin 43 of the switching lever 42 also slides from the second guide surface 46 to the first guide surface 45 as the cam gear 59 rotates, the lock plate connected to the pivot pin 29 of the cycle stop lever 30 17 moves to the right, which releases the engagement between the playback operating lever 8 and the lock plate 17, and the operating lever 8 returns to the non-operating position, and the latch release lever 33 also moves forward. , the latch plate pin 51 rides on the land 521], and the right side engagement piece 51b of the pin 51 separates from the engagement guide hole 55 of the cam lock arm 38. In this way, when the playback operation lever 8 returns to the non-operating position, the head stand also returns from the contact position (working position) between the tape 4 and the magnetic head to the non-working position, and the pinch rollers 3a, 3b
In the middle of the transition to the 7-word mode state, both return from the pressure contact position with the capstan 2av2b to the non-operating position. Thereafter, as the cam gear 59 rotates, one of the engagement fists 74g is locked to the engagement lock protrusion 66, and as a result, one of the toothless portions 73a faces the drive gear 75, and the cam gear 59 stops again. . When the cam gear 59 stops, the reverse operation lever 48 stops rotating in the counterclockwise direction after the lock plate 178 returns to the stop position, and enters the stop mode position. Similarly, the switching lever 42 also stops moving to the right. in this way,
Even when the direction is changed from the reverse mode, the mode returns to the stop mode, and when the playback operation lever 8 is pressed as described above, the playback state starts from the 7-word playback state.

(g) Automatic switching from tape end to stop mode in reverse mode (see Figures 17 and 18) In the reverse playback state shown in Figure 9, the tape 4 is completely attached to the reel of the supply reel stand (not shown). is wound up,
When the tape end is reached, the supply reel stand stops rotating due to the slip action of the slip roller despite the rotation of the play idler. Along with this, the take-up reel stand 93 also stops rotating, so that the right pressing protrusion 102 of the slip plate 98 is pressed against the contact surface 10 of the sensor lever 69.
It stops when it comes into contact with 1. Then, the sensor lever 69 temporarily stops rotating in the clockwise direction when the cam 7 lower 87 reaches the maximum diameter portion of the second cam 90. Then, as shown in FIG. 17, the cam member 92 rotates counterclockwise, and the cam follower 87 comes into sliding contact with the third cam 9j. Accordingly, the sensor lever 69 gradually begins to rotate clockwise, moving the lock connecting rod 67 in contact with the abutment pin 7° to the right. As a result, the cam lock arm 38 rotates clockwise, and the latch plate pin 51 rotates clockwise as the right engagement piece 51b of the latch plate pin 51 moves from the left engagement portion 55b along the engagement guide hole 55. Displace the direction. When the cam 7 lower 87 reaches the maximum diameter portion of the third cam 91, the rotational displacement of the sensor lever 69 in the clockwise direction becomes maximum, and the cam lock arm 38 is displaced clockwise to the maximum. Cam 7 oror 87 is the third cam 91
When the cam lock arm 38 passes through the maximum diameter end, the lock of the cam lock arm 38 is released, and the latch plate pin 51 engages with the right engaging portion 55a while displacing clockwise, and the cam lock arm 38 rotates counterclockwise. lock.

This rotational return of the cam lock arm 38 releases the lock between the engagement lock protrusion 66 and the other engagement protrusion 74b of the cam gear 59, and the cam gear 59 rotates counterclockwise due to the spring and meshes with the drive gear 75. and then rotate further counterclockwise. Accordingly, the reverse operation lever 48 is rotated clockwise, and the switching lever 42 is moved to the right. At the same time, the pinch roller 3b on the reverse operation side moves away from the capstan 2b, and at the same time, the pinch roller 3a approaches the capstan 2a. The subsequent operation of the transport reaches the stop mode attitude through the same process as in the above-mentioned section (v). Note that when the regeneration operation lever 8 returns to the non-operating position, the cycle stop lever 30 contacts the bending contact portion 32, and as the lock plate 17 returns to the non-operating position, the cycle stop lever 30 contacts the bending contact portion 32. Returns to non-operating position while sliding in contact with.

(h) Continuous tape playback Now, in the transport of the present invention, continuous playback is possible by pulling the mode switching operating lever 11 to the operating position. That is, Figures 19 to 3
In Figure 0, when the mode switching operation lever 11 is pressed and locked in the operation position, the operation lever 1
The cycle stop lever locking piece 39 of No. 1 comes into contact with the abutment pin 41 of the cycle stop lever 30 and locks and fixes the cycle stop lever 30 in a clockwise direction around the pivot pin 29. The first cycle stop lever 30. The second guide surface 45° 46 and the contact pin 43 of the switching lever 42 are prevented from coming into engagement with each other. As a result, the tape 4 is moved to the cycle stop lever 30.
It is not affected by the running stop effect and is continuously regenerated endlessly.

Figures 19 and 20 show the 7-word playback state in this continuous playback state, and the operation of each part is described in (b) above.
Same as section. 21 to 24 show the operation of each part when switching from the 7-word mode to the reverse mode in the continuous playback state, and this operation is similar to the above (c).
Same as section.

FIG. 25 and FIGS. 2 and 6 explain the operation of each part when the end detection mechanism switches from the forward mode to the reverse mode, and the operation at this time is the same as in the above item (e). FIG. 27 and FIG. 28 show a state in which the direction switching operation lever is suppressed from the reverse mode, and the operation in this case is the same as in the above section. Figures 29 and 30 show the tape end state in reverse mode, and the operation at this time is as described above.
Although it is almost the same as the above, in this case, the cycle stop lever 30 does not come into contact with the contact pin 43 of the switching lever 42, so that the tape is run at a constant speed in the 7-word mode again. However, if the stop operation lever 5 is suppressed,
Since the power switch 21 is turned off, the tape is not played back.

(S) Switching from stop mode to recording mode (31st
(See Figures 1 and 32) When the recording operating lever 9 is depressed from the stop mode shown in Fig. 2 as shown in Fig. 31, one-way recording in the 7-word state is possible. In other words, the recording operation lever 1
9 is pressed, the operating piece 35 of the operating lever 9 comes into contact with the contact portion 31 of the reproducing operating lever 8, and the reproducing operating lever 8 is simultaneously moved to the operating position, and both reproducing levers 8, 9 are pressed.
is locked in the operating position. As a result, a recording device (not shown) is activated, and recording onto the tape 4 becomes possible. In this state, the recording cancel lever 79 is pressed against its abutment pin 8.
3 is separated from the lock release prevention piece 36 of the recording operation lever 9, the tension pin 82 rotates counterclockwise, and the abutment pin 83 is brought into contact with the rear end surface of the notch opening 25 of the lock plate 17. Contact is locked. This state is the recording mode state.

(J) End of tape from recording mode (see Figures 33 and 34) When the tape 4 reaches the end in recording mode, the operations of each part go through the process disclosed in the foregoing (E). When the reverse operation lever 48 is rotated counterclockwise as shown by the imaginary line in FIG. Further, the recording release lever 79 moves to the right as the release connection lever 61 rotates, and the engagement piece 84 of the lever 79 engages the lock release bent piece of the lock plate 17. 27 and pushes the lock plate 17 to the right. As a result, the playback operation lever 8 and the recording operation lever 9 are each unlocked from the lock plate 17 and returned to their non-operation positions. After this, the lock plate 17 returns to the left and returns to the stop mode state.

In addition, in the recording mode state, the direction switching operation is prevented by means not shown.

(l) Switching from stop mode to fast forward mode or rewind mode (see Figures 35 and 36) From the stop mode shown in Figure 2 to the fast forward operation lever 6 or rewind mode as shown in Figure 35 When the operation lever 7 is pressed, a fast forward or unwinding state is entered, and the tape 4 is driven at high speed in the forward or reverse direction. However, FIG. 35 shows the rewind mode. Now, to explain the fast-forward mode, when the fast-forward operation lever 6 is depressed to move the lock plate 17 to the right and the power switch 21 is turned on, a high-speed drive mechanism (not shown) is activated and the tape 4 is Wind up at high speed in the backward direction. Note that the amount of rightward movement of the lock plate 17 in the fast-forward mode is smaller than in the playback mode due to the positional relationship of the six-bin engaging recesses 23. Further, one toothless portion 73a of the cam gear 59 faces the drive gear 75 and does not rotate. In addition, in rewind mode,
The operation is the same as in the fast forward mode except that the tape 4 is rewound at high speed in the reverse direction by the high speed drive mechanism.

(w) From the fast forward mode or rewind mode to the end of Q (see Figures 37 and 38) Now, to explain the fast forward mode, the tape 4 is moved to the unwinding reel stand 93.
When the tape is completely wound on the reel and reaches the end of the tape,
After each part of the transport goes through a process that is almost the same as the process in the above item (J), the engagement between the lock plate 17 and the fast-forward operating lever 6 is released, and the fast-forward operating lever 6 returns to the non-operating position. As a result, the link with the high-speed drive mechanism is released. In addition, even in rewind mode,
This is done almost in the same way as in the fast-forward mode described above.

(Effects) As described above, according to the present invention, the mode switching operating lever is brought into contact with the cycle stop lever so as to be able to move toward and away from the cycle stop lever, and when the mode switching operating lever is operated during playback of a tape. Since the cycle stop lever is moved to the non-operating position and the tape is continuously played back, the continuous reciprocating playback operation between the seven-way direction and the reverse direction can be performed entirely mechanically. Therefore, the mechanism can be simplified and downsized, and the assembly workability can be improved and manufacturing costs can be reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a plan view schematically showing the state in which the tape is running, FIGS. 2 to 38 each show the operating state of the transport, and FIG. 2 is a plan view in the stopped state. 3 is a cross-sectional view taken along line A-A in FIG. 2, FIG. 4 is a cross-sectional view taken along line B-B in FIG. 2, and FIG. Figure 6 is a sectional view taken along line C-G in Figure 5, Figure 7 is a plan view showing a state in which the direction has been switched from the forward playback state, and Figure 8 is a cross-sectional view taken along the line C-G in Figure 5.
9 is a plan view showing the reverse playback state, FIG. 10 is a sectional view taken along the E-E line in FIG. 9, and FIG. 11 is a transition from the reverse playback state to the stop operation state. 12 is a cross-sectional view taken along the line F-E in FIG. 11, FIG. 13 is a plan view showing the tape end state when playing words for a 7-year-old, and FIG. - A sectional view taken along the line G, FIG. 15 is a plan view showing a state in which the direction has been repeatedly switched from the reverse playback state, FIG. 16 is a sectional view taken along the H-H line in FIG. 15, and FIG. 17 is a reverse playback. A plan view showing the state of the tape end at the time, FIG.
19 is a plan view showing the 7-word playback state during continuous playback, and FIG. 20 is a sectional view taken along line I-1 in the figure.
9 is a cross-sectional view taken along the J-J line in Figure 9, Figure 21 is a plan view showing the state when the direction is switched from forward playback during continuous playback, and Figure 22 is a cross-sectional view taken along the - line in Figure 21. 23 is a plan view showing the reverse playback state during continuous playback, FIG. 24 is a sectional view taken along the line L-L in FIG. A plan view showing the end state, FIG. 26 is the second
5 is a cross-sectional view taken along the line M-M in Figure 5, Figure 27 is a plan view showing the state when the direction is switched from the reverse playback state during continuous playback, and Figure 28 is a view taken along the line N-N in Figure 27. 29 is a plan view showing the tape end state during reverse playback during continuous playback, and FIG.
Fig. 31 is a plan view showing the recording state, Fig. 32 is a sectional view taken along the Q-Q line in Fig. 31, and Fig. 33 is the tape end during recording. A plan view showing the condition,
FIG. 34 is a sectional view taken along line R-R in FIG. 33, FIG. 35 is a plan view showing the unwinding state, and FIG. 36 is a sectional view taken along line R-R in FIG.
-8 line, Figure 37 is a plan view showing the tape end state during rewinding, Figure 38 is T-'T in Figure 37.
It is a sectional view along a line. 4 is the tape, 5 is the stop operation lever, 6 is the fast forward lever,
7 is a rewind lever, 8 is a playback lever, 9 is a recording operation lever, 10 is a direction switching lever, 11 is a mode switching operation lever, 13 is a main chassis, 17 is a lock plate, 30 is a cycle stop lever, 33 is a latch release lever, 36 is a lock release prevention piece, 38 is a cam lock arm, 42 is a switching lever, 48 is a reverse operation lever, 51 is a latch plate T pin, 59 is a cam gear, 61 is a release connection lever, 66 is an engagement Lock protrusion, 67
is the lock connection rond, 69 is the sensor lever, 73a,
73b is a toothless part, 74a and 74b are engagement protrusions, 75 is a drive gear, 77 is a motor, 79 is a recording release lever, 87 is a cam 7 lower, 92 is a cam member, 93 is a winding and take-up reel stand, 98 is a A slip plate, 101 is a contact surface, 102 is a suppressing protrusion. Applicant Sharp Co., Ltd. Agent Patent Attorney Oka 1) Kazuhide procedural amendment (voluntary) 1. Indication of the case 1982 Patent Application No. 249021 3. Person making the amendment Relationship with the case Patent applicant address Osaka City 22-22 Nagaike-cho, Abeno-ku Name (
504) Sharp Corporation Representative Saeki Asahi 4, Agent

Claims (1)

[Claims] (1) It has a playback operating lever, a direction switching operating lever, and a mode switching operating lever, and the mode switching operating lever is brought into contact with and separating from the cycle stop lever to displace it, and when the tape is being played back. , comprising means for reversing the tape playback running direction when the direction switching operation lever is depressed, and for causing the tape to run in the reverse playback direction when winding of the tape in the forward playback direction is completed. In the transport for a reverse type tape recorder, the cycle stop lever is configured to temporarily stop tape running when the tape playback running direction is reversed in conjunction with the means in the actuated position, and the cycle stop lever is configured to temporarily stop tape running when the tape playback running direction is reversed. A reverse type tape recorder transport characterized in that when the operation lever is operated, a cycle stop lever is displaced to a non-operating position so that the tape is continuously played back.