JPH0426982Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention provides operation control of a tape recorder having a playback function in a first direction and a playback function in a second direction opposite to the first direction. Regarding equipment.

(b) Prior Art Recently, tape recorders called head-on stereos, which use a head-on to listen to the reproduced sound of a magnetic tape, have become popular. Tape recorders used in such head-on stereo systems generally have a playback function in a second direction, which is the opposite direction to the first direction, in addition to a playback function in the first direction. Such a tape recorder having a bidirectional playback function is equipped with an automatic reversing device that automatically performs a reproducing operation in the opposite direction when the magnetic tape reaches the end due to the reproducing operation. There is a technique described in the -22251 publication. According to such technology, the first
The reproducing operation in this direction and the reproducing operation in the second direction can be performed continuously and repeatedly. However, when listening to the playback sound of a magnetic tape using a head-on stereo, it is common to replace the cassette tape after one round trip playback operation is completed. Therefore, it would be convenient if the tape recorder could be configured to automatically switch to a stopped state when one reciprocating playback operation is completed. In addition, tape recorders with a bidirectional playback function have the problem of not knowing in which direction the playback operation will start when a playback operation is performed, but this problem has been solved by starting playback operation in a fixed direction. There is a technique disclosed in Japanese Utility Model Publication No. 55-33476.

(c) Purpose of the invention The present invention aims to provide an operation control device for a tape recorder with a bidirectional playback function, which has a reciprocating playback function and a playback start function from a fixed direction.

(d) Structure of the invention The present invention has a playback function in a first direction and a playback function in a second direction opposite to the first direction, and when a playback operation is performed, the playback operation in the first direction is performed. In the tape recorder where is started,
It is in the first position during playback operation in the first direction and fast forward operation, and is in the second position during playback operation in the second direction and rewind operation, and detects the end of the magnetic tape during playback operation. a running direction switching plate that is displaced from a first position to a second position and from the second position to the first position; and a sliding board to which a magnetic head is attached and that is slidably displaced to an operating position during a reproducing operation. A lock plate that engages with a lock portion formed on the sliding substrate when the sliding substrate is in the operating position and holds the sliding substrate in the operating position, and a rotational displacement during fast forwarding and rewinding operations. a switching operation lever for displacing the running direction switching plate between the first position and the second position; a lock member for holding the switching operation lever in the operating position; and a locking member that becomes operable when the sliding board is in the operating position, and rotational displacement when the traveling direction switching plate is displaced from the second position to the first position. and a release member that displaces the lock plate to the unlocked position, and when a playback operation is performed from the rewind operation state, the lock plate is displaced to the unlocked position, thereby displacing the lock member to the unlocked position. Accordingly, the releasing operation of the releasing member caused by the displacement of the traveling direction switching plate in the first direction is prevented.

(E) Examples The drawings all relate to the motion control device of the present invention.
Fig. 1 is a plan view showing the stopped state, Fig. 2 is a plan view of the main parts showing the regeneration operation state in the first direction, and Fig. 3 is a plan view of the main parts showing the regeneration operation state in the second direction. , FIG. 4 is a plan view of the main parts during automatic stop operation, FIG. 5 is a plan view showing the rewinding operation state, and FIG.
The figure is a plan view showing a state in the middle of switching from a rewinding operating state to a reproducing operating state. In the figure, 1
is a traveling direction switching plate which is attached to a fixed board (not shown) so as to be movable in the directions of arrows A and B, and which is in the intermediate position shown in FIG. 1 when in a stopped state; At the time of playback operation and fast forward operation, the first position is displaced in the direction of arrow A,
Further, during a reproducing operation in the second direction and a rewinding operation, the drive mechanism is placed in a second position displaced in the direction of arrow B and has the function of switching the drive mechanism to a state for performing each operation. In such a configuration, the running direction switching plate 1 is moved to the first position when a playback operation is performed, and is returned to the first position by the rotational force of an electric motor or the like when the end of the magnetic tape is detected during the playback operation. from the second position to the first position, and from the second position to the first position.
The device for displacing the running direction switching plate 1 associated with the detection of the end of the magnetic tape may be any known switching mechanism that utilizes the rotational force of an electric motor or the attractive force of a plunger, and its explanation will be omitted. 2 is a spring fixed to a fixed base plate by a shaft 3;
When the running direction switching plate 1 is in the first position, the running direction switching plate 1 is biased in the direction of arrow B, and the running direction switching plate 1 is biased in the direction of arrow B.
When in position, it acts to bias in the direction of arrow A. 4 is a control pin fixed on the running direction switching plate 1, and 5 is an arrow A on the fixed board.
This is a locking plate which is attached so as to be able to be displaced in directions B and B, and is biased by a spring 6 in the direction of arrow A, which is the locking position. An elongated hole 10 into which the control pin 4 is inserted is formed, and the control pin 4 can be displaced in the direction of arrow B, which is the unlocked position, by a stop operation. Reference numeral 11 denotes a sliding board to which a magnetic head (not shown) is attached and which is also attached to a fixed board so as to be movable in the directions of arrows C and D, and is moved by a spring 12 to the stop position of arrow C. An operation section 13 is formed which is biased in the direction and to which a playback operation button (not shown) is attached. Further, the sliding board 11 is engaged with the lock portion 7 formed on the locking plate 5 when the sliding board 11 is in the operating position displaced in the direction of arrow D, and the sliding board 11 is operated. A locking piece 14 for holding in position and a control piece 15 for controlling an automatic stopping operation, which will be described later, are formed. Reference numeral 16 denotes a release member which is rotatably attached to the fixed base plate by a shaft 17 and biased clockwise by a spring 18, and which is connected to the release part 8 formed on the lock plate 5. A contact portion 19 that comes into contact is formed. Further, 20 is attached to the fixed board and the release member 16
is a regulating pin that contacts and regulates the clockwise rotational position of the release member 16. Reference numeral 21 denotes a control member which is rotatably attached to the release member 16 by a shaft 22 and is biased to rotate counterclockwise by a spring 23, and which is fixed to the travel direction switching plate 1. An engaging part 24 that engages with the control pin 4 located on the sliding board 11 and an abutting part 25 that comes into contact with the control piece 15 formed on the sliding base plate 11 are formed. Reference numeral 26 denotes a switching operation lever which is rotatably attached to a fixed base plate by a shaft 27 and has an operation part 28 formed therein, and is rotated clockwise by a fast forward operation and reversed by a rewind operation. It is rotated clockwise. Further, a locking roller 29 is rotatably attached to the switching operation lever 26 by a pin 30, and an engagement hole engages with a connecting piece 31 formed on the running direction switching plate 1. 32 is formed. Reference numeral 33 denotes a lock member which is rotatably attached to the fixed base plate by a shaft 34 and is biased to rotate counterclockwise by a spring 35, and is attached to the switching operation lever 26. A locking portion 36 engages with the locking roller 29 to lock and hold the switching operation lever 26 in the stop position and the operating position, and an abutting slope portion 37 contacts the control portion 9 formed on the locking plate 5.
is formed. In such a configuration, when the sliding base plate 11 is displaced in the direction of arrow D, which is the operating position, the lock member 33 is rotationally displaced to the unlocked position as the lock plate 5 is displaced in the direction of arrow B. The displacement of the traveling direction switching plate 1 in the direction of the arrow A due to such displacement is carried out by the time the engaging portion 24 formed on the control member 21 is rotated to the position where it engages with the control pin 4. are related. The motion control device of the present invention is constructed as described above, and its operation will be explained next.

The state shown in FIG. 1 is a stopped state, in which the running direction switching plate 1, the sliding board 11 and the switching operation lever 2
6 is in the stop position. When the sliding base plate 11 is at the stop position, the control piece 15 formed on the sliding base plate 11 comes into contact with the abutting portion 25 formed on the control member 21, and the control member 21 is held in place by the spring 23. It is in a state where it is rotated clockwise against the biasing force. When the user performs a regeneration operation in such a stopped state, the sliding board 11 is moved by the spring 1.
The driving direction switching plate 1 is slid against the biasing force 2 in the direction of the arrow D, which is the operating position, and is also displaced in the direction of the arrow A, which is the first position where the regeneration operation is performed in the first direction. The sliding substrate 11 is indicated by arrow D.
When the sliding board 11 is displaced in the direction, the locking piece 14 formed on the sliding board 11 engages with the locking part 7 formed on the locking plate 5, so that the sliding board 11 is locked in the operating position. . Further, when the running direction switching plate 1 is displaced in the direction of arrow A, which is the first position, the switching operation lever 26 is rotated clockwise along with the displacement, and the switching operation lever 26 is rotated clockwise. By engaging with the lock portion 36, the switching operation lever 26 is locked and held in the operating position in which it is rotated clockwise. FIG. 2 is a plan view of the main part showing the regeneration operation state in the first direction configured by such regeneration operation, and in such a state, the control piece 15 formed on the sliding substrate 11 is Since the control member 21 is separated from the contact portion 25 formed on the control member 21, the control member 21 is rotationally displaced counterclockwise by the biasing force of the spring 23. The control member 21 is rotated counterclockwise by the biasing force of the spring 23, and its rotational position is regulated by contacting the control pin 4 fixed to the running direction switching plate 1. become a state. In this state, the running direction switching plate 1 is held in the first position by the locking of the switching operation lever 26 in the operating position, but is urged in the direction of arrow B by the spring 2. The reproduction operation in the first direction is performed in this state, but when the magnetic tape runs to the end, the running direction switching plate 1 is displaced to the second position in the direction of arrow B by the action of the end detection device. It will be done. When the traveling direction switching plate 1 is displaced in the direction of arrow B, the switching operation lever 26 is rotated counterclockwise in accordance with the displacement, and the locking portion 36 formed on the locking roller 29 and the locking member 33 is rotated. By engaging with the switching lever 26, the switching operation lever 26 is locked and held in the operating position in which it is rotated counterclockwise. Figure 3 shows the second
This indicates the regeneration operation state in the direction, and as the traveling direction switching plate 1 is displaced to the second position,
A control pin 4 fixed to the running direction switching plate 1
and the engaging portion 24 formed on the control member 21 become engageable. In this state, the traveling direction switching plate 1 is held in the second position by the locking of the switching operation lever 26 in the operating position, but is urged in the direction of arrow A by the spring 2. Reproducing operation in the second direction is carried out in this state, but when the magnetic tape runs to the end, the running direction switching plate 1, which was in the second position, is moved to the first position by the action of the end detection device. Arrow A
direction. When the running direction switching plate 1 is displaced in the direction of arrow A from the state shown in FIG. 3, the control pin 4 fixed to the running direction switching plate 1
engages with the engaging portion 24 formed on the control member 21 and displaces the control member 21 in the direction of the arrow A. As a result, the release member 16 displaces the shaft 1 as shown in FIG.
7 in a counterclockwise direction. When the release member 16 is rotated counterclockwise, the contact portion 19 formed on the release member 16 comes into contact with the release portion 8 formed on the lock plate 5, and
The lock plate 5 is pressed and displaced in the direction of arrow B, which is the unlocked position. When the lock plate 5 is moved to the unlocked position, the engagement between the lock piece 14 formed on the sliding base plate 11 and the lock portion 7 formed on the lock plate 5 is released. As a result, the sliding board 11 held in the operating position is moved by the spring 12.
The biasing force causes the tape recorder to be displaced in the direction of arrow C, which is the stop position, and the tape recorder enters the stop state shown in FIG.

As described above, the playback operation, playback direction switching operation, and automatic stop operation in this embodiment are performed, but the rewinding operation will be explained next. Such rewinding operation is performed by rotating the switching operation lever 26 counterclockwise when the tape recorder is in the stopped state shown in FIG. When the switching operation lever 26 is rotated counterclockwise, the engagement hole 32 of the switching operation lever 26 and the connecting piece 31 engage with each other, so that the running direction switching plate 1 connected to the operation lever 26 moves to the first position. While being displaced in the direction of arrow B, which is the second position, the switching lever 26 is locked and held in the operating position by engagement between the locking roller 29 and a locking portion 36 formed on the locking member 33. FIG. 5 shows a rewinding operation state configured by such a switching operation. In this state, since the sliding board 11 is at the stop position, the control piece formed on the sliding board 11 15 is in contact with a contact portion 25 formed on the control member 21, and the control member 21 is pressed against the spring 2.
It is in a state where it is rotated clockwise against the urging force No. 3. A rewinding operation is performed in this state, but the operation when a direct playback operation is performed from this state will now be described. When the tape recorder is in the rewind operation state shown in FIG. 5 and a playback operation is performed, the sliding board 11
is displaced in the direction of arrow D, which is the operating position, against the biasing force of the spring 12, and the running direction switching plate 1
When the sliding board 11 is slightly displaced in the direction of arrow D due to the regeneration operation, the lock piece 14 formed on the sliding board 11 is moved to the first position in the direction of arrow A. 5, the lock plate 5 is displaced in the direction of arrow B, which is the unlocked position. FIG. 6 shows a state in the middle of such switching, and when the lock plate 5 is displaced in the direction of arrow B, the control portion 9 formed on the lock plate 5 is formed on the lock member 33. Since the abutting inclined portion 37 is pressed, the locking member 33 is pressed against the spring 35.
It is rotated clockwise about the shaft 34 against the urging force of. When the locking member 33 is rotated clockwise, the locking portion 36 formed on the locking member 33 and the locking roller 29
Since the engagement is released, the switching operation lever 26 is rotated clockwise by the biasing force of the spring 2 that biases the running direction switching plate 1 in the direction of arrow A. As a result of this operation, the running direction switching plate 1 is displaced in the direction of arrow A, which is the first position direction, and after this operation is performed, the sliding base plate 11 is displaced to the operating position. Therefore, even if the control member 21 is rotated in the counterclockwise direction, which is the operating position, as the sliding base plate 11 is displaced to the operating position, the engaging portion 24 formed on the control member 21 remains in the running direction. It does not engage with the control pin 4 fixed to the switching plate 1. Therefore, even if the running direction switching plate 1 is displaced from the second position to the first position by the playback operation, the automatic stop operation is not performed and the tape recorder continues the playback operation in the first direction shown in FIG. become a state.

As described above, switching to the rewinding operating state and switching from the rewinding operating state to the reproducing operating state are performed, but next, the fast forwarding operation will be explained. Such fast-forwarding operation is performed by rotating the switching operation lever 26 clockwise when the tape recorder is in the stopped state shown in FIG.
When the switching operation lever 26 is rotated clockwise, the engagement hole 32 of the switching operation lever 26 and the connecting piece 31 engage with each other, so that the running direction switching plate 1 connected to the operation lever 26 is moved to the first position. The switching operation lever 26 is displaced in the direction of the arrow A, which is the position, and the switching operation lever 26 is locked in the operating position by engagement between the locking roller 29 and the locking portion 36 formed on the locking member 33. When such an operation is performed, the tape recorder enters a fast-forward operating state, but in such a fast-forward operating state, the running direction switching plate 1
is in a state where it is displaced to the first position, so even if a regeneration operation is performed from this state, the engaging portion 24 of the control member 21 and the control pin 4 do not engage, and the switching to the regeneration operation state is prevented. It can be done without any trouble.

Each operation in this embodiment is performed as described above, but when the stop operation button (not shown) is operated while the tape recorder is in the playback, fast-forward, and rewind states, the lock plate 5 moves to the arrow B. At the same time, the locking member 33 is rotated clockwise and the tape recorder is brought to a stopped state.

(f) Effects of the invention The motion control device of the invention can perform an automatic stop operation by utilizing the displacement of the running direction switching plate that switches the running direction in a tape recorder that has a reciprocating playback function and a playback start function from a fixed direction. This has the advantage of simplifying the configuration. In addition, the lock plate that locks the sliding board in the operating position and the lock member that locks the running direction switching plate are linked to each other, so that an automatic stop operation is performed when switching from the rewind operation state to the playback operation state. Since this is prevented, the switching to the reproducing operation state can be carried out without any trouble, and the practical value of the present invention is very great.

[Brief explanation of the drawing]

The drawings all relate to the motion control device of the present invention.
Fig. 1 is a plan view showing the stopped state, Fig. 2 is a plan view of the main parts showing the regeneration operation state in the first direction, and Fig. 3 is a plan view of the main parts showing the regeneration operation state in the second direction. , FIG. 4 is a plan view of the main parts during automatic stop operation, FIG. 5 is a plan view showing the rewinding operation state, and FIG.
The figure is a plan view showing a state in the middle of switching from a rewinding operating state to a reproducing operating state. Explanation of main drawing numbers, 1... Running direction switching plate, 4...
... Control pin, 5 ... Lock plate, 11 ... Sliding board, 16 ... Release member, 21 ... Control member, 24
...Engaging portion, 26...Switching operation lever, 33...
Locking parts.

Claims (1)

[Scope of utility model registration request] A tape recorder that has a playback function in a first direction and a playback function in a second direction opposite to the first direction, and starts a playback operation in the first direction when a playback operation is performed. It is in the first position during playback operation in the direction and fast forward operation, and is in the second position during playback operation in the second direction and during rewind operation.
position, and when the end of the magnetic tape is detected during playback operation, from the first position to the second position,
Further, there is a running direction switching plate which is displaced from the second position to the first position, a sliding board to which the magnetic head is attached and which is slidably displaced to the operating position during a playback operation, and the sliding board is in the operating position. A lock plate is provided with a lock piece that engages with a lock portion formed on the sliding board to hold the sliding board in the operating position, and is rotated during fast forwarding and rewinding operations. and a switching operation lever that displaces the traveling direction switching plate to the first position and the second position, and when the switching operation lever is in the operating position, it engages with a lock portion formed on the switching operation lever to operate the switching operation. a locking member that holds the lever in the operating position and is provided with an abutting slope portion that abuts a control portion formed on the lock plate; from the second position of the running direction switching plate to the first position
The release member is rotatably displaced when displaced in the position direction and displaces the lock plate to the unlocked position, and when a playback operation is performed from the rewind operation state, the lock plate is moved to the unlocked position. displacing the locking member to a non-locking position by a contact force of the control portion against the contact slope portion due to the displacement;
Operation control of a tape recorder with a bidirectional playback function, characterized in that the movement direction switching plate is enabled to be displaced in the first direction, and the release member is prevented from being released due to rotational displacement. Device.