JPS60143465A - Transport of reverse-type tape recorder - Google Patents

Abstract

PURPOSE:To allow simplification of a mechanism and its miniaturization by making either of a fast feeding operation lever and a rewinding operation lever return to the nonoperational position when a forward/reverse switching means changes from the forward condition to the reverse condition. CONSTITUTION:When a right switching operation lever 10 is operated with pressure in the forward reproduction condition, the forward mode is switched to the reverse mode. In other words, when the direction switching operation lever 10 is operated with pressure, a cam lock arm 38 is rotated by the prescribed angle in the clock-wise direction around a supporting shaft 62 by a cam lock arm operation piece 37 of the operation lever 10. Thus, a right-side engaging piece 51b of a latch plate pin 51 is removed from the right-side engaging part, and it is guided to the rear part of an engagement guiding hole 55. An engaging lock protrusion 66 and an engaging protrusion 74a of the other are disengaged. A cam gear 59 is energized by the spring (not shown in the figure), it rotates in the counterclockwise direction, and it meshes with a driving gear 75. Thus, even a part without gear tooth 73b is rotated by the driving gear 75.

Description

Detailed Description of the Invention (Technical Field) The present invention provides a reverse type tape 1+-I capable of reciprocating playback.
-IP/7'l L-bow/l-F&-LL core eggplant conventional technology) Generally speaking, as a transport for this type of cheap recording, recording is performed by pressing and repeating the operation button facing the panel surface of the tape deck. , playback, direction switching, fast forwarding, rewinding, stopping, and other operations.

By the way, in the past, most of them are roughly divided into seven parts: a switching part for reciprocating playback operation between the forward direction and the reverse direction;
It was equipped with a tape end detection section, a release mechanism, etc., and its own release mechanism was separately provided for fast forwarding and rewinding. However, in this case, it is necessary to provide a unique release mechanism for fast forwarding and rewinding, which increases costs, complicates the mechanism, and makes it difficult to downsize the mechanism. There is.

(Purpose) The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional art, and after detecting the end of the tape, activates a switching section for reciprocating playback operation between the 7-way V direction and the reverse direction to release the lock. The purpose is to simplify and downsize the mechanism 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 tape recorder incorporating an example of a transport according to the present invention.
A pair of left and right pinch rollers 3a and 3b are provided, and both capstans 2a and 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) Configuration of main transport parts of this example FIGS. 2 and 3 show the stop mode state, and in this tape recorder 1, multiple operation windows on the panel board (not shown) indicate stop, fast forward, Button-type operation buttons (not shown) for rewinding, playing, recording, changing directions, and changing modes are provided individually.By pressing one or two of the buttons, recording can be started. , 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 operating 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 are each provided with a lock bin 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 is made of a horizontally long flat plate arranged perpendicularly to each operating lever 5 to 9, and is connected to the main chassis through long holes 19 and 19 transparently provided at both left and right ends. 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
3 to the left by a tension spring 22 suspended between
That is, it is pulled and biased in the direction away from the power switch 21. Each of the engagement windows 181) to 18e of the stop operation lever 5, excluding the lock bin engagement window 18a, has four lock bin engagement parts 23 at the rear end portion thereof, each of which holds each lock pin 16 in the operating position. Further, the engagement window 18a of the stop operation lever 5 has an inclined guide surface 24 for guiding the lock pin 16 of the lever 5. Further, the engagement window 18e of the recording operation lever 9 has a cutout opening 25 extending to the left. 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. Bracket 2 near the side
The cycle stop lever 30 is rotatably supported via a pivot pin 29 disposed at the tip of the lever 8.

(ii) Structure of each reproducing 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 each made of a rectangular flat plate having a catch pin with 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 constituent parts of the operation levers 5 to 7, and also includes a contact portion 31 with the recording reproduction lever 9 and a bent contact portion with the cycle stop lever 30 at two locations in the rear, front and rear. 32 is provided to protrude leftward, and an L-shaped abutment piece 34 having an abutment surface of the latch release lever 33 and 1 is extended at the 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 the actuation piece 35 that comes into contact with the abutting portion 31 of the playback operation lever 8 when pressed is moved to the right. A lock release prevention piece 3 protruding toward the
6 is installed protrudingly. The direction switching operation lever 10 is a rectangular flat plate having an elongated hole 12 similar to that of each of the aforementioned operation levers, and a hook pin for a tension spring 15.The ground of the cam lock arm operation piece 37 is bent sharply to the right from the rear end of the flat plate. It comes into contact with the cam lock arm 38 as a response mechanism to operate it. Note that this direction switching operation lever 10 cannot be suppressed 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 for a tension spring 15, and has a cycle stop lever lock piece 39 bent at right angles from the rear end thereof. In addition, when switching this mode, press bar 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 cycle stop lever 30 Cycle stop lever 3 rotatably supported on lock plate 17
0 is used when switching the tape running direction during playback.
This device temporarily stops the tape drive, and is biased to rotate counterclockwise by a tension spring 40 suspended between the right side of the tape drive and the main chassis 13. In the stop mode, the right end is used for the playback operation. Rotation is restricted by contacting the bending contact portion 32 of the lever 8. Further, an abutment pin 41 is protruded from the tip and abuts on the operating piece 39 of the mode switching operation lever 11 so as to be able to come into contact with and separate from it. Furthermore,
On the left front side of the pivot pin 29, there is an arcuate guide surface 44 that contacts the contact 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 45.4
6 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 forward or reverse constant speed feed, 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 formed to extend rearward from the left end, and in the stop mode, the engagement piece 47 connects to the front end bifurcated engagement portion of the reverse operation lever 48. 49 is engaged.

(v) Structure of the latch release lever 33 and its surroundings The latch release lever 33 as a response mechanism consists of a long strip-shaped flat plate in the front and back, and its front end surface 33
a is biased forward by a tension spring 50 suspended between the main chassis 13 and the contact piece 34 of the regeneration operation lever 8 so as to closely oppose it. As shown in FIG. 3, the right half of the rear end is in sliding contact with a latch plate pin 51 as a response mechanism.
1 and the inclined guide surface 52a for vertically moving the
Lands 52b each having a round wheel surface shape are integrally formed.

As shown in FIG. 4, this latch plate bin 51 has engaging pieces 51a and Slb 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, and a cam lock arm. 38 engagement guide holes 5
5, and the left end side engagement piece 51a is supported by a compression spring 56 interposed between a large diameter spring receiving part 53a attached to the upper end of the support part 53 and the latch plate pin 51. It is pressed downward.

(vi) Structure of the reverse operation lever 48 The reverse operation lever 48 is formed in the shape of a bell crank, and a support shaft 57 is provided upright on the main chassis 13 at the bent portion thereof.
It is rotatably supported by bifurcated engaging portions 49. at both front and rear ends.
58 respectively. Of these, the rear end bifurcated engagement portion 58 is slightly bent at its midway portion, 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 4 of the front end bifurcated engagement portion 49
9a 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 has a support shaft 6 erected on the main chassis 13 at a bent portion of a flat plate formed in a hook shape.
The cam lock arm 38 is pivotably supported at the latch release lever 33, and is biased to rotate counterclockwise by a tension spring 63 suspended between the right end of the cam lock arm 38 and the main chassis 13. Rotation is restricted by a rotation restriction shaft 64 erected from the main chassis 13 . An engagement hole 55 for detachably engaging the latch plate bin 51 described above is formed in a circular shape at the rear end of the cam lock arm 38, and an operating piece 65 extends to the right near the rear of the support shaft 62. An engagement locking protrusion 66 projects downward from the tip of the operating piece 65. 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 this lock connecting rod 67 is connected to a guide member 67 disposed at the front and rear of the intermediate portion.
8.68, it reciprocates left and right according to the rotation of the cam lock arm 38, and has a bending abutment part 71 at its tip that makes contact with the abutment 70 of the sensor lever 69 so that it can come into contact with and separate from it. It is formed.

(vii) Structure of the cam gear 59 and its surroundings The cam gear 59 has a rotating shaft 72 rotatably supported on the main chassis 13, and a toothless portion 73a having missing teeth by a certain angle at a symmetrical position with respect to the rotating shaft 72; 73b, and the engaging protrusions 74a, 74b that engage with the engaging locking protrusion 66 of the cam lock arm 38 are attached to the toothless parts 73a, 73.
It protrudes downward at a position shifted by a certain phase with respect to b, 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 rotatably supported on the main chassis 13, and is operatively 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 a contact pin 81 that contacts the left end surface of the lock plate 17 to the right 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 84 that engages with the holder 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 roller 787 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 follower 87 is in contact with 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 shaft of the take-up reel stand 93. It is set in a position surrounding the front of 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 are each connected to a straight portion 8 having a tapered shape from both ends of a circular arc portion 89a concentric with the rotating shaft 95.
9a and 89b, the second cam 90 is an arcuate cam integrally attached to the rotating shaft 95, and the third cam 91 is disposed at a position away from the rotating shaft 95, and The 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 a 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. Pressing protrusions 102, 102 are provided in a protruding manner to press against contact 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. That is, 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. The electrically connected motor 77 is stopped.

(b) Mode switching from stop mode to 7-word mode (see Figures 5 and 6) In the stop mode, when the regeneration operation lever 8 is pressed backward, the lock pin 16 moves into the lock pin engagement recess 2.
3 is engaged and locked, the regeneration operation lever 8 is held in the operating position, and the lock plate 17 is moved in parallel to the right, so that the switch suppressing portion 17a of the lock plate 17 presses into contact with the power switch 21, and the power source switch 21 is engaged and locked. Turn on switch 21 and 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 operating lever 8 moves rearward, the latch release lever 33 moves rearward, and the latch release pin 51 is guided by the inclined guide surface 52a and descends, as shown in FIG. As shown, 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 5j9, 75 are not meshed, and therefore the cam gear! A 59 is held stopped. That is, this state is a 7-word playback state.

(c) Switching from the 7-word mode to the reverse mode (see FIGS. 7 to 10) When the right switching operation lever 10 is pressed in the 7-word playback state, the forward mode is switched to the reverse mode. That is, when the direction switching operating lever 10 is depressed, the cam lock arm 38 is rotated clockwise around the support shaft 62 by a predetermined angle 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, and the cam gear 59 is urged by a spring (not shown) and rotates counterclockwise to mesh with the drive gear 75.
5, it is further rotated until it reaches the other toothless portion 73b. 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*.
The switching lever 42 that engages the front end bifurcated engagement portion 49 of the operating lever 48 is moved to the left, thereby separating from the forward side capstan 2a, and the reverse side pinch roller 3b comes into pressure contact with the tape 4. It enters reverse playback mode. Further, rotation of the second cycle stop lever 30 is restricted 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 Then, the tape 4 moves to the first guide surface 45 and once stops running the tape 4 in the 7th direction.

9 and 10 show the reverse regeneration state, and when the pressing 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 part 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 abutting pin 43 of the switching lever 42 is moved to the cycle stop lever 30.
The tape 4 moves from the first guide surface 45 to the second guide surface 46, and by the displacement of the cycle stop lever 30, the tape 4 runs in the reverse direction, 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) When the stop operating lever 5 is depressed from the reverse playback state, the stop mode state is entered, but after this, the playback operating lever 8 is pressed. When you operate it, it always plays forward. First, when the stop operation lever 5 is depressed, the lock pin 16 of this presses into contact with the inclined guide surface 24 of the lock plate 17, moving the lock plate 17 to the right, and the lock pin 16 of the regeneration operation lever 8 and the lock bin engaging recess 23 are unlocked, and the regeneration operating lever 8 is returned to the non-operating position. Along with this return operation of the regeneration operating 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, as shown in FIG. right side engagement piece 5
1b and the left engagement portion 5Sb of the engagement guide hole 55 are disengaged. As a result, the cam lock arm 38 rotates back in the counterclockwise direction until it comes into contact with the rotation regulating shaft 64 by the tension spring 63, and the engagement lock protrusion 66 of the cam lock arm 38 and the other engagement protrusion 74b of the cam gear 59 will be unlocked. The cam gear 59 rotates counterclockwise by a certain angle and meshes with the drive gear 75 again, and rotates counterclockwise until the gear 75 locks one of the engagement protrusions 74a with the engagement lock protrusion 66. As a result, one toothless portion 73a is again rotated counterclockwise until it is locked with the engagement lock protrusion 66, 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 3b separates from the same side capstan 2a, and the forward side pinch roller 3b moves away from the capstan 2a on the same side.
b moves in the direction of the capstan 2a on the same side. however,
At this time, since the playback operation lever 8 is unlocked, 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 locking position as in the 7-word mode in the stop mode, so that when the regeneration operating lever 8 is pressed repeatedly, 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 7-word playback state shown in FIG. 5, when the tape 4 is completely wound onto the reel (not shown) of the take-up reel stand 93 and reaches the end of the tape, the take-up reel stand 93 is moved to the play idler. (not shown) rotates, a slip roller (not shown) slips and stops rotating.

Along with this, the left suppression protrusion 10 of the slip plate 98
2 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 abutment 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 lower 87 approaches the maximum diameter part of the third cam 91, the engagement lock protrusion 66 of the cam lock arm 38 and one engagement protrusion 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 7-word 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. Then, since the lock plate 17 has been moved to the right, the cycle stop lever 30 is in contact with the contact part 3 of the regeneration operation lever 8.
1, and as the switching lever 42 moves to the left, its contact pin 43 gradually slides from the arc-shaped guide surface 44 to the first guide surface 45, and once the tape 4 Stop running in the forward direction.

Further, when the cam 7 lower 87 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 inserted into the rotation opening by the engagement lock protrusion 66.
Note that since the other toothless portion 73b faces the drive gear 75, the cam gear 59 is held stopped. This locked position of the cam gear 59 is the reverse mode state.

Further, the reverse operation lever 48 is also locked by the cam gear 59 being locked like a double series, 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 and the capstan 2b. The tape 4 is sandwiched between and held in a pressed state, thereby causing the tape to run at a constant speed in a reverse state. Therefore, the abutment pin 43 of this outer switching lever 42 is connected to the second guide surface 4
6 and displaces the cycle stop lever 30 to the tape running state.

(to) Direction change from reverse mode 1) When the changeover lever is pressed (see Figures 15 and 16) Direction change operation lever 10 from the reverse playback state shown in Figure 9
When the cam lock arm operating piece 37 of the operating lever 10 rotates the cam lock arm 38 in the clockwise direction, the latch plate bin 51, which had been engaged and locked with the left engagement portion 5Sb, is engaged. It is displaced clockwise along the guide hole 55. Next, when the pressing operation of the direction switching operation lever 10 is released, the cam lock arm 38 ascends the tension pin 63 and is rotated counterclockwise, thereby locking the latch plate pin 51 to the right 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 according to the rotation of the cam gear 59, the lock plate connected to the pivot pin 29 of the cycle stop lever 30 17 moves to the right, thereby disengaging the regeneration operation lever 8 and the lock plate 17, and the operation lever 8 returns to the non-operation position, and the latch release lever 33 also moves forward. As a result, the latch plate pin 51 rides on the land 52b, and the right engagement piece 51b of the pin 51 engages the cam lock arm 3.
8 away from the engagement guide hole 55. In this way, when the playback operation lever 8 returns to the non-operating position, the head stand also moves to the contact position (operating position) between the tape 4 and the magnetic head.
The capstan 2a returns to its non-operating position, and the pinch rollers 3a and 3b are also in the middle of transitioning to the forward mode state.

2b returns to the non-operating position. Thereafter, as the cam gear 59 rotates, one of the engaging protrusions 74a
is locked by the engagement locking protrusion 66, and the toothless portion 73a on one side 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 regeneration operation lever 8 is pressed as described above, the forward regeneration state is started.

(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). It was rolled up into
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 pressing protrusion 102 on the right side of the slip plate 98 presses against the m1 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 7 lower 87 comes into sliding contact with the third cam 91. 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 in 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 this time, at the same time as the reverse operation side pinch roller 3b moves away from the capstan 2b, the seventh reverse operation side 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 according to the present invention, continuous playback is performed by locking the mode switching operating lever 11 in the operating position. That is, Figures 19 to 3
In Figure 0, when the mode switching lever 11 is suppressed and locked in the operating position, the operating lever 1
The cycle stop lever locking piece 39 of No. 1 comes into contact with the contact pin 41 of the cycle stop lever 30 and locks and fixes the cycle stop lever 30 in a state in which it is rotated clockwise 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. , FIG. 19 and FIG. 20 show the seven-word reproduction state in this continuous reproduction state, and the operation of each part is the same as in the above (b). FIGS. 21 to 24 show the operation of each part when switching from the 7-word mode to the reverse mode in the continuous reproduction state, and this operation is similar to the above-mentioned item (c).

FIG. 25 and FIG. 26 explain the operation of each part when switching from the 7-word mode to the reverse mode by the end detection mechanism, and the operation at this time is as described in (E) above.
Same as section. FIG. 27 and FIG. 28 show a state in which the direction switching operation lever is pressed from the reverse mode, and the operation in this case is the same as in the above section (f).

29 and 30 show the tape end state in the reverse mode, and the operation at this time is almost the same as in item (g) above, but in this case, the cycle stop lever 30 is connected to the abutting pin of the switching lever 42. 43, the tape is again run at a constant speed in forward mode. However, when the stop operation lever 5 is pressed and operated, the power switch 21 is turned off, so that the tape is not reproduced.

(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 suppressed, the actuating 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 operating levers 8, 9
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, it is rotated counterclockwise by the tension spring 82, and the abutment pin 83 abuts against the rear end surface of the notch opening 25 of the lock plate 17. 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 item (E) above. As shown by the imaginary line in FIG. 33, as the reverse operation lever 48 is rotated counterclockwise, the release connection lever 61 comes into contact with the left outer end surface 49a of the reverse operation lever 48 and rotates counterclockwise. Further, with the rotational displacement of the release coupling lever 61, the recording release lever 79 moves to the right, and the engagement piece 84 of the lever 79 engages the lock release bent piece 27 of the lock plate 17. and pushes the lock plate 17 to the right. As a result, the playback operation lever 8 and the recording/recording operation lever 9 are each unlocked from the lock plate 17 and return 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 operation as shown in Figure 35 When the lever 7 is pressed repeatedly, the tape 4 enters a fast forward or rewind state, and the tape 4 is driven at high speed in the forward direction or in the reverse direction. However, FIG. 35 shows the rewind mode. now,
To explain about the fast-forward mode, press the fast-forward operation lever 6.
When the lock plate 17 is moved to the right by pressing , and the power switch 21 is turned on, a high-speed drive mechanism (not shown) is activated, and the tape 4 is wound in the 7-ward direction at high speed. 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 four lock pin engaging portions 23. Also, cam gear 5
Is 9 the missing tooth on one side? 3a faces the drive gear 75 and does not rotate. The rewind mode is the same as 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 unwinding/returning 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 take-up 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 ↓7 and the fast-forward operating lever 6 is released, and the fast-forward operating lever 6 returns to the non-operating position. Accordingly, the link with the high-speed drive mechanism is released. In addition, even in the winding and rewinding mode,
This is done in the same manner as in the fast-forward mode described above.

(Effects) As described above, according to the present invention, the fast-forwarding lever and the rewinding operation lever are used to reverse the tape playback direction during tape playback, and also to reverse the tape playback direction when the tape is played back. When winding is completed, the tape is connected to a tape end detection mechanism via a seven-way reverse switching means that causes the tape to run in a reverse playback direction, and when the forward-reverse switching means switches from a seven-way state to a reverse state. Since either the fast forward operating lever or the rewind operating lever is returned to the non-operating position, after the end of the tape is detected, the seven-way reverse switching means is activated to release the lock. This makes it possible to simplify and downsize the mechanism and reduce manufacturing costs.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and 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 cross-sectional view taken along the line C-G in Figure 5, Figure 7 is a plan view showing a state in which the direction has been changed from the 7-word playback state, and Figure 8 is a cross-sectional view taken along line C-G in Figure 7.
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 sectional view taken along line FF in FIG. 11, FIG. 13 is a plan view showing the tape end state during forward playback, and FIG. 14 is a sectional view taken along line FF in FIG. 13. 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 line H-H in FIG. 15, and FIG. 17 is during reverse playback. FIG. 18 is a plan view showing the tape end state in FIG. 17.
19 is a plan view showing the 7-word playback state during continuous playback, and FIG. 20 is a sectional view taken along the I-H line 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 a reverse playback state during continuous playback, FIG. 24 is a sectional view taken along the line L-L in FIG. 23, and FIG. 25 is a tape end state during forward playback during continuous playback. 26 is a plan view showing 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.
9 is a cross-sectional view taken along line P-P in Figure 9, Figure 31 is a plan view showing the recording state, Figure 32 is a cross-sectional view taken along line Q-Q in Figure 31, and Figure 33 is the tape end state during recording. A plan view showing
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.
37 is a plan view 1 showing the tape end state at the time of rewinding, and FIG. 38 is a sectional view taken along line -8, T-T in FIG.
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 operating lever, 9 is a recording operating lever, 10 is a direction switching operating lever, 11 is a mode switching operating 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 bin, 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 portion, 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 take-off 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) Writ of amendment to Kazuhide procedure (spontaneous) February 16, 1980 1. Display of the case 1989 Patent Application No. 249019 3. Relationship with the amended person case Patent applicant address: 22-22 Nagaike-cho, Abeno-ku, Osaka City Name (
SO'4) Sharp Corporation Representative Saeki Asahi 4, Agent

Claims (1)

[Claims] (1) The fast-forward operation lever and the rewind operation lever are used to reverse the tape playback direction during tape playback, and when the tape has been wound in the 7-word playback direction, the tape is moved in the reverse playback direction. 7
It is connected to the tape end detection mechanism via backward/reverse switching means, and when the 7 backward/reverse switching means switches from the 7 backward state to the reverse state, the fast forward F% operation lever and the rewind operation lever are connected to the tape end detection mechanism. A reverse type tape refugue transport characterized in that either one of the two returns to a non-operating position.