JP3132341B2 - Tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape recorder, and more particularly to a tape recorder which can reduce the running load of a magnetic tape at the time of fast-forwarding and rewinding. The present invention relates to a tape recorder that can effectively prevent the tape recorder from entering the back side of a capstan.

[0002]

2. Description of the Related Art In recent years, there has been a remarkable demand for power saving in tape recorders, and various improvements have been made. Incidentally, a conventional tape recorder is configured as disclosed in Japanese Patent Application Laid-Open No. 2-105362. In this conventional example, when the pinch rollers (5) and (6) are not in contact with the capstans (36) and (37) in a stopped state (ie, the state shown in FIG. 20), rewinding and fast-forward driving are performed. It was something to be done. Pinch roller in this state
(5) and (6) are provided on the pinch roller arms (20) and (21) urged forward by springs (27) and (28). Regulated by shafts (138) and (139). Therefore, even in the state shown in FIG. 20, the pinch rollers (5) and (6) are always forward (in the direction of the magnetic tape (3)) even if they do not contact the capstans (36) and (37). The tape is energized and enters the tape cassette (2)
(3) is in contact with. This is the same for the pinch roller (6) in FIG. 21 in the normal reproduction state and the pinch roller (5) in FIG. 22 in the reverse reproduction state. Also, in order to prevent the magnetic tape from entering the back side of the capstan when replacing the tape cassette, in the conventional tape recorder, when opening the holder body, the pinch roller does not approach the capstan side more than necessary. To the pinch roller arms (20) and (21)
0b) and (21b), and curved portions (138a) and (139a) are formed on the pinch roller control shafts (138) and (139) (see FIGS. 7 and 8).

[0003]

However, when the magnetic tape is in contact with the pinch roller at the time of fast-forward or rewind as described above, the running load of the magnetic tape is large and the rotation transmission efficiency is high. There is a problem that becomes worse. Further, in the structure in which the control unit is provided on the pinch roller arm, it is necessary to dispose the pinch roller arm control shaft against the urging force of the urging spring forward of the pinch roller arm, which makes assembly difficult. There is a problem.

Further, in this type of tape recorder, conventionally, the relative positional relationship between the tape cassette and the magnetic head installed at the center of the head arm on the front side of the head arm when the tape cassette is mounted is set on the substrate. Although the position is regulated by the provided cassette pressing spring, it has not been completely determined, so that the relative positional relationship between the magnetic head and the tape cassette may fluctuate during reproduction and recording. When the relative positional relationship fluctuates, there is a problem that sound quality is adversely affected.

The present invention has been made in view of the above-mentioned conventional problems, and suppresses the running load of a magnetic tape by causing the pinch roller and the magnetic tape to be separated from each other during fast-forward or rewind. In addition, the magnetic tape can be effectively prevented from entering the back side of the capstan when replacing the tape cassette with a simple configuration, and the relative positional relationship between the magnetic head and the tape cassette does not change during playback and recording. It is an object of the present invention to provide a tape recorder that does not adversely affect sound quality.

[0006]

In order to achieve the above-mentioned object, a tape recorder according to the present invention rotates a predetermined angle about a rotation center as a fulcrum with respect to a magnetic tape so as to be positioned at a reproduction position and a non-reproduction position. A head arm, at least one pair of capstans, and a predetermined angle about the rotation center as a fulcrum so as to take pressure contact and non-pressure contact positions with respect to the capstan in order to feed the magnetic tape. and rotatably installed pinch rollers to the pinch roller arm, the head arm and the pinch roller arm and held freely rotated by a predetermined angle, and is placed against the substrate rotatably, operating position and removable tape cassette position
In a tape recorder having a holder body to be moved, a downward direction of the magnetic head and a pinch roller arm
And a control rod that reciprocates in the tape running direction when the pinch roller arm is not biased in the rotating direction.
With a position spaced from the position and the magnetic tape is pressed against times <br/> form freely rolling on down, controls the pinch roller arm control shaft which acts on the control unit which is formed on the pinch roller arm
Provided on an arm that is rotatably provided on the rod,
Equipped with a spring that biases toward the pinch roller side.
The pinch roller control shaft is formed on a pinch roller arm
When it comes into contact with the control unit, it
Roller against the capstan, fast-forward and
When returning, the pinch roller is not pressed against the capstan.
Pinch roller arm so that it is separated from the magnetic tape.
Arm and pinch roller control axis
It has been achieved .

Further, the tape recorder of the present invention has a holder
-Holder support that holds the main body rotatably with respect to the substrate
With a guide cam protruding from the base and a tape cassette
When opening the holder body that has been moved to the attach / detach position,
Make sure that the chiller does not approach the capstan side more than necessary.
A pinch roller arm that engages with the guide cam
Also the in is installed on.

[0008]

The tape recorder according to the present invention comprises a head arm which rotates at a predetermined angle about a rotation center as a fulcrum so as to be positioned at a reproduction position and a non-reproduction position with respect to a magnetic tape, at least one pair of capstans, and this capstan. A pinch roller rotatably mounted on a pinch roller arm that rotates by a predetermined angle about a rotation center as a fulcrum so as to take a position of pressure contact with the capstan to send out the magnetic tape with the capstan, In a tape recorder including a holder body rotatably holding a head arm and a pinch roller arm at a predetermined angle and rotatably mounted on a substrate, the pinch roller arm is not biased in the rotation direction. It is rotatable, and the pinch roller presses against the capstan during playback, and the pinch roller is used when fast-forwarding and rewinding. The way a non-pressure contact, so are provided pinch roller arm control shaft which acts on the control portion formed on the pinch roller arm control rod, the traveling load of the magnetic tape rotation transmitting efficiency is improved reduced.

In addition, a guide cam is projected from a holder support that rotatably holds the holder body with respect to the substrate, and when the holder body is opened, the pinch roller does not approach the capstan side more than necessary. When the engaging portion abutting on the guide cam is provided on the pinch roller arm, it is possible to effectively prevent the magnetic tape from entering the back side of the capstan with a small number of components when the tape cassette is replaced.

[0010]

[0011]

1 and 2 show a tape recorder according to the present invention.
A description will be given based on the embodiment shown in FIG. FIG. 1 is a plan view showing an external appearance of a main part of a tape recorder according to an embodiment of the present invention, FIG. 2 is a front view of a magnetic head portion as viewed from the back of the tape cassette, FIG. FIG. 4 is a schematic plan view showing a state in which the rapid traverse lever is stopped and stopped.
FIG. 6 is a schematic plan view showing an operation state in which the motor is reversed from the stop state and the restriction of the fast-forward lever by the first control lever is released, FIG. 6 is a schematic plan view showing a state at the moment of the release,
7 is a schematic plan view showing a state after the release, FIG. 8 is a schematic plan view showing a state at the time of rewinding, FIG. 9 is a schematic plan view showing a state at the time of the rapid forwarding, and FIG. FIG. 1 is a schematic plan view showing a state at the time of transition from a state at the time of rewinding to a state at the time of normal rotation reproduction.
1 is a schematic plan view showing a state at the time of forward rotation reproduction, FIG. 12 is a schematic plan view showing a state at the time of reverse rotation reproduction, and FIG. 13 is a view mainly showing a state of rotating parts such as gears. FIG. 14 is a schematic plan view showing a state during normal rotation reproduction, FIG. 15 is a schematic plan view showing a state during reverse reproduction, and FIG. 16 is a state during fast forward. FIG. 17 is a schematic plan view showing the state at the time of rewinding, and FIG. 18A mainly shows the operating state of the pinch roller, the magnetic head, etc., when fast-forwarding, during rewinding, and stopped. FIG. 2B is a schematic plan view showing the state at the time, FIG.
FIG. 19A is a schematic plan view showing the state of operation of the pinch roller arm control shaft and the like, FIG. 19A is a schematic plan view showing the state during normal rotation reproduction, FIG. 19B is a partial plan view of FIG. FIG. 21A is a schematic plan view showing a state during the reverse reproduction, FIG. 21B is a partial plan view of FIG. 21A, and FIG. 21A is a holder support base at the time of closing operation of the holder main body in the tape recorder of the present invention. (B) is a view similar to FIG. (A) when the holder body is opened, and (c) is (a). )
It is the figure which looked at the principal part of a figure from a plane.

In the drawings, reference numeral 1a denotes a first capstan for rotating and reproducing the magnetic tape in the normal direction, and 1b denotes a second capstan for reverse reproduction and running in a direction different from that of the first capstan 1a. A first flywheel 2 is provided on each of the first and second capstans 1a and 1b.
a and the second flywheel 2b are coaxially mounted so as to rotate integrally.

Reference numeral 3 denotes a motor capable of rotating in both forward and reverse rotations. The rotation of the motor 3 is transmitted to the second flywheel 2b and the second capstan 1b via a first belt 4a. Is done. The rotation transmitted to the second flywheel 2b is transferred to a relay provided with a large-diameter gear 5a that meshes with a large-diameter gear 2ba coaxially mounted so as to rotate integrally with the second flywheel 2b. The first flywheel 2a and the second flywheel 2b are transmitted to the first flywheel 2a and the first capstan 1a from the relay gear pulley 5 via the second belt 4b. Rotate in the opposite direction.

Reference numeral 6 denotes a normal rotation reel 7 for winding a magnetic tape.
a or a gear mechanism for transmitting the rotation of the motor 3 to the reversing reel 7b, and has the following configuration. 6
Reference numeral a denotes a rotatable first relay gear in which a large-diameter gear 6aa and a small-diameter gear 6ab meshed with the large-diameter gear 5a are coaxially mounted. The small-diameter gear 6ab meshes with the main gear 6b. The main gear 6b has a friction pulley 6c.
6d (FIGS. 13 to 17)
) Is rotatably attached to a shaft portion of the friction pulley 6c through a felt by a compression spring, for example.
It is configured to be pressed against.

A play gear 6e (see FIGS. 13 to 17) meshes with the friction gear 6d, and is rotatably provided on a shaft 9a provided upright on a play lever 9 which rotates about the shaft 8. By the rotation of the play lever 9, the play gear 6e transmits its rotational force to a forward rotation reel gear 6h or a reverse reel gear 6j, which will be described later, or not to both. Reference numeral 6f denotes an idle gear rotatably provided, which is configured to be able to mesh with the play gear 6e. Reference numeral 6g denotes a forward rotation reel drive gear rotatably provided, which meshes with the forward rotation reel gear 6h provided coaxially with the forward rotation reel 7a to transmit the rotation of the idle gear 6f. Reference numeral 6i denotes a reversing reel drive gear rotatably provided, which is configured to be able to mesh with the play gear 6e, and to rotate the play gear 6e at the time of meshing with the play gear 6e. It is in mesh with the reversing reel gear 6j so as to transmit it to the reel gear 6j.

6ka is a first fast-forward gear that can mesh with the main gear 6b, and 6kb is a forward reel driving gear 6
g and a second fast-forward gear meshable with the reversing reel drive gear 6i, which are coaxially and integrally attached to the fast-forward lever 10 so as to be rotatable under a rotational load applied by a compression spring. ing. The fast-forward lever 10 is provided with an arc-shaped long hole 10a engaging with a shaft 11a provided at the tip of the second control lever 11, and an arc-shaped long hole 10b engaging with the shaft 12. As shown in FIG. 13, the first fast-forward gear 6ka is connected to the main gear 6b.
The second fast-forward gear 6kb meshes with the forward reel driving gear 6g or the reverse reel driving gear 6i, or meshes with both of them. (See FIGS. 8 and 9 and FIGS. 16 and 17).

Reference numeral 13 denotes a mode switching mechanism for changing the meshing state of the gear mechanism 6 so as to switch the running direction of the magnetic tape, and is configured as follows. 13a is a second relay gear integrally formed with a large-diameter gear 13aa meshing with the main gear 6b and a coaxial small-diameter gear (not shown), and 13b is a small-diameter gear (not shown) of the second relay gear 13a. ) Is a third relay gear in which the large-diameter gear 13ba meshing with the small-diameter gear 13bb is coaxial with the large-diameter gear 13ba. A cam gear 13c is provided so as to mesh with the small-diameter gear 13bb of the third relay gear 13b. I have. The cam gear 13c has first, second, and third missing tooth portions 13ca, 13cb, and 13cc formed in a gear portion thereof, and a first cam formed in a groove shape on the front and back surfaces. 13cd and a second cam 13ce, and a third cam 13cf and a fourth cam 13cg formed on the outer peripheral portion on the front side.

Reference numeral 13d denotes a solenoid, and in a non-energized state, a permanent magnet (not shown) causes the attracting piece 13da to be attached to the attracting portion 13d.
db and is attracted by a permanent magnet when energized.
The suction of da is released. Reference numeral 13e denotes a solenoid arm urged by a spring 13f in a direction to separate the suction piece 13da from the suction portion 13db, and the suction piece 13da is attached to one end of the solenoid arm, and the shaft 13ea (see FIG. Second cam 13ce
It is configured to be brought into contact with, guided by, and locked.

A switching lever 13g is provided on the shaft 18 so as to be rotatable.
And the lever shaft 13gb at the other end is engaged with the control rod 13h. This control rod 13
As shown in FIG. 2 and FIGS. 18 to 20, first and second pinch roller arm control shafts 13 ha and 13 hb are attached to h while being held by the arms 13 he respectively. That is, the arm 13he is connected to the control rod 13h.
The first and second pinch rollers 17a, 17 are rotatably held by a shaft 13hf, which is provided upright, and are supported by a spring 13hg.
It is urged to the b side, and the urging force is regulated by the projection 13hh. And these first and second
The pinch roller arm control shafts 13ha, 13hb are provided with first and second pinch roller arms 16a, 16b which are rotatably mounted on the holder body 15 with the shafts 16aa, 16ba as fulcrums. 16
bb, and affixes the first and second pinch rollers 17a and 17b attached to the first and second pinch roller arms 16a and 16b to the first and second capstan 1s.
a, 1b are controlled so as to be pressed against and separated from each other.

According to the present invention, the first and second pinch roller arms 16a and 16b are made rotatable without being urged in either direction of rotation, and the first or second pinch roller arms 16a and 16b are used only during reproduction and recording. The pinch roller 17a or 17b presses against the first or second capstan 1a or 1b, and the first or second pinch roller 17a or 17b at the time of fast-forward and rewind, as shown in FIG. The first and second capstans 1a and 1b are not pressed into contact with the first and second capstans 1a and 1b so as not to enter the first and second capstans 1a and 1b from the extension of the tape guide 26a in the tape cassette 26. Make up. 14a, 14
Reference numeral b denotes a first and a second holder support that rotatably supports the holder body 15 with respect to the substrate 27.

In addition, according to the present invention, FIGS.
As shown in FIG. 3, first and second holder supports 14a for rotatably holding the holder body 15 with respect to the substrate 27,
Guide cams 14aa, 14ba are respectively provided on the sides of the 14b corresponding to the first and second capstans 1a, 1b, and when the tape cassette 26 is replaced, as shown in FIGS. When the holder body 15 is opened, the first and second pinch rollers 17a and 17b are respectively brought into contact with the corresponding first and second capstans 1a and 1b.
Guide cam 14a so as not to approach the side more than necessary.
The engaging portions 16ac and 16bc abutting on the first and second pinch roller arms 16a and 16b are provided on the first and second pinch roller arms 16a and 16b.

Reference numeral 13i denotes a relay lever which is rotatable about a shaft 19, and has one end connected to the shaft 13 of the control rod 13h.
hc, and a shaft 13ia provided at the other end is engaged with a long hole 9b provided in the play lever 9. Reference numeral 20 denotes a head arm which is rotatably mounted on the holder body 15 with a shaft 20a as a fulcrum. A magnetic head 21 is provided at a central portion on the front side, and a control portion 20b is provided on a rear side. The head arm 20 is normally urged by a spring 22 in a direction away from the magnetic tape.
During reproduction and recording, a head arm control shaft 13hd erected on the control rod 13h pushes the control unit 20b, and pushes the head arm 20 toward the magnetic tape against the urging force of the spring 22.

In the present invention, the head arm control shaft 13
hd is formed of a resin spring as shown in FIGS. 18 to 20B so that the magnetic head 21 escapes to the anti-magnetic tape side so that the magnetic head 21 does not enter the magnetic tape side more than a certain amount. Furthermore, at least during playback and recording,
A projecting portion 20c is formed on the front side, for example, at a position near the magnetic head 21 so that a part of the front side of the head arm 20 contacts the front surface of the tape cassette 26.

That is, in the present invention, the protrusion 20c is formed at an appropriate position on the front surface of the head arm 20, and at least the reproduction and reproduction are performed.
At the time of recording, since the protrusion 20c and the front surface of the tape cassette 26 are in contact with each other, the relative positional relationship between the tape cassette 26 and the magnetic head 21 is determined, and the head arm control shaft 13hd is formed of a resin spring. Therefore, the magnetic head 21 does not enter the magnetic tape side beyond a certain amount. Accordingly, the pressing force of the magnetic head 21 against the magnetic tape is not always constant and fluctuates, so that deterioration of sound quality can be prevented.

Reference numeral 23 denotes a first control lever, the base end of which is engaged with the third cam 13cf.
f, the center portion is rotated about a fulcrum 23a, and a groove 23c provided in the fast-forward lever 10 is fitted into a shaft portion 23b at the tip thereof.
When the mode is changed between fast-forward and rewind, the position of the fast-forward lever 10 is restricted or released by the release of the main gear 6b. By transmitting the rotation and moving the fast-forward lever 10 with the rotational load of the first fast-forward gear 6ka on the fast-forward lever 10, the meshing position of the second fast-forward gear 6kb is changed to change the forward reel drive gear 6g.
Alternatively, it is designed to mesh with the reversing reel drive gear 6i.

Further, the second control lever 11 is provided with a first control lever.
Can rotate about the same rotation fulcrum 23a as the control lever 23 of FIG. 1, the base end of which engages with the fourth cam 13cg, and the rack gear 11 near the shaft 11a provided at the end thereof.
b is provided. The rack gear 11b is driven by a second fast-forward gear 6k in accordance with the rotation of the fast-forward lever 10 in which the long hole 10a is engaged with the shaft 11a of the second control lever 11.
b. Then, the base end of the second control lever 11 is engaged with the fourth cam 13cg,
With the 1a and the rack gear 11b swinging toward the main gear 6b, the first fast-forward gear 6ka can mesh with the main gear 6b. The meshing operation is performed when the restriction of the fast-forward lever 10 is released from a stopped state in which the movement of the fast-forward lever 10 described later is restricted by the shaft portion 23b of the first control lever 23, and when the restriction is released. This is performed at the time of switching from the state to the rewinding state, and at the time of switching to the reverse state, respectively.
The second fast-forward gear 6 kb for the rack gear 11b
, The fast-forward lever 10 is moved to the first and second fast-forward gears 6ka, 6kb with respect to the fast-forward lever 10.
Irrespective of the rotational load of the first gear,
The rotational force of the fast-forward gear 6ka is transmitted to the fast-forward lever 10. 25 is a first control lever 23
And a spring for urging the base end of the second control lever 11 in a direction in which the base end of the second control lever 11 comes into sliding contact with the third and fourth cams 13cf and 13cg.

The tape recorder of the present invention is configured as described above, and its operation will be described below. First, before explaining the operation of each mode, the cam gear 1
The operation of 3c will be described. This cam gear 13c is
Each mode is held in a state where each of the toothless portions 13ca, 13cb, 13cc is opposed to the small-diameter gear 13bb of the third relay gear 13b. The state in which the portions 13cb face each other is reverse playback, and the state in which the missing tooth portions 13cc face is stop, fast-forward and rewind states. Each of the cams 13cd to 13cg also functions in accordance with each mode in accordance with the rotational position of the cam gear 13c. 1st cam 13cd
Controls the one end cam shaft 13ga of the switching lever 13g, and determines the position of the control rod 13h via the switching lever 13g according to each mode.
The second cam 13ce provides a trigger for switching the mode to the cam gear 13c by the action of the solenoid 13d. When the suction of the suction piece 13da is released by energization, the shaft 13ea at the tip of the solenoid arm 13e is moved. The cam gear 13c comes into contact with the inclined portion of the second cam 13ce. At this time, the cam gear 13c rotates slightly clockwise, and the gear portion meshes with the small-diameter gear 13bb (see FIG. 10).
The rotation of the third relay gear 13b by the motor 3 causes the cam gear 13c to rotate to the next missing tooth portion. Next, the third cam 13cf engages with the base end of the first control lever 23, and the first control lever 2
The position of the shaft portion 23b at the tip of No. 3 is controlled. Furthermore, the fourth
The cam 13cg is engaged with the base end of the second control lever 11 and, depending on the mode, the fast-forward lever 10, that is, the main gear 6b of the first and second fast-forward gears 6ka and 6kb.
To control the position with respect to.

[Replacement of Tape Cassette (See FIG. 21)] When replacing the tape cassette 26, FIG.
As shown in (b), when the holder main body 15 is opened, the guide cams 14 projecting from the first and second holder support bases 14a and 14b are associated with the rotation of the holder main body 15.
aa, 14ba, engaging portions 16ac, 16b installed on the first and second pinch roller arms 16a, 16b.
c contacts. Thereby, in the stop state, the first and second
The first and second pinch rollers 17a and 17b respectively correspond to the first and second pinch rollers 17a and 16b, regardless of whether the pinch roller arms 16a and 16b are rotatable without biasing the pinch roller arms 16a and 16b in either rotation direction. The second capstans 1a and 1b are prevented from approaching more than necessary, and the magnetic tape is
It does not enter the back side of the second capstans 1a, 1b.

[Stop (see FIGS. 4 and 18)] At the stop, as shown in FIG. 4, the small-diameter gear 13 of the third relay gear 13b is used.
bb meshes with the third toothless portion 13 of the cam gear 13c.
This is the state where cc is located. In this stop position, the switching lever 13 is actuated by the action of the first cam 13cd.
g, the control rod 13h is located at the neutral position, and as shown in FIG. 18, the first and second pinch roller arm control shafts 13ha and 13hb are connected to the first and second pinch roller arms 16a and 16b. Without pressing the control units 16ab and 16bb, the first and second pinch rollers 17a and 17b
The second capstans 1a and 1b are not in contact with each other. At this time, the play gear 6e has been disengaged from the reversing reel drive gear 6i and the idle gear 6f via the relay lever 13i and the play lever 9. Further, the head arm control shaft 13hd is released from the pressing of the control unit 20b of the head arm 20 (see FIG. 18), the head arm 20 to which the magnetic head 21 is attached retreats by the urging force of the spring 22, and the magnetic head 21 It is in shallow contact with the tape,
The protrusion 20c of the head arm 20 is a tape cassette 26.
Is not in contact with. The state shown in FIG. 4 is immediately after the stop mode is set, and the main gear 6 is driven by the forward rotation of the motor 3.
Even when the first fast-forward gear 6ka meshing with b is in a rotating state, the movement of the fast-forward lever 10 can be prevented because the groove 10c of the fast-forward lever 10 is fitted to the shaft portion 23b of the first control lever 23. Regulated second fast-forward gear 6kb
Does not mesh with the reversing reel drive gear 6i, and the reversing reel 7b does not rotate. Therefore, it is possible to prevent the magnetic tape from running alone during the transition to the stop state.

[Removal of fast-forward lever regulation (FIGS. 5 to 7 and FIG. 1)
4), by releasing the restriction of the fast-forward lever 10, the state of the cam gear 13c can be changed to the rewind state and the fast-forward state without changing the state of the cam gear 13c. That is, by rotating the motor 3 in the reverse direction from the stop regulation state, as shown in FIGS. 5 to 7, first, the first fast-forward gear 6ka meshed with the main NOR 6b rotates by reversing the main NOR 6b. Due to the rotational load between the first fast-forward gear 6ka and the fast-forward lever 10, the fast-forward lever 10 is guided by the shafts 11a and 12 to rotate clockwise (the state shown in FIG. 5). The fast-forward gear 6kb meshes with the rack gear 11b, and the rotational force of the two fast-forward gears 6ka, 6kb is transmitted to the fast-forward lever 10 regardless of the rotational load.
Is further rotated clockwise. As a result, the shaft portion 23b of the first control lever 23 is disengaged from the groove 10c of the fast-forward lever 10 to release the regulation of the fast-forward lever 10, but the moment of the release is shown in FIG. The shaft portion 23b of the first control lever 23 is disengaged from the convex portion 10ca provided at the end of the concave groove 10c, and is in a state after the release shown in FIG. 7, and FIG. 13 shows the restriction of the fast-forward lever 10 shown in FIG. This is a stopped state after the state is released. Further, the base end of the first control lever 23 in the stopped state faces the recess of the third cam 13cf, and is in a non-contact state until the restriction state of FIG. 4 and the moment of release in FIGS. By the release shown in FIG. 6, the first control lever 23 is rotated clockwise by the urging force of the spring 25, and its base end is the third cam 13
7 and comes into the engaged state shown in FIG.

[At the time of rewinding (see FIGS. 8, 17, and 18)]
The main gear 6b is rotated counterclockwise by driving the motor 3 to rotate forward from the state of the restriction release in FIGS. At this time, the second control lever 11 is engaged with the fourth cam 13cg to swing the fast-forward lever 10 in the direction of the main gear 6b by the shaft 11a.
ka and the main gear 6b are in an engaged state. The meshing of the first fast-forward gear 6ka and the main gear 6b causes the second fast-forward gear 6kb to mesh with the reversing reel drive gear 6i, rotates the reversing reel 7b at high speed via the reversing reel gear 6j, and performs rewinding. . At the time of rewinding, the first and second pinch rollers 17a and 17b are not in contact with the first and second capstans 1a and 1b, and the head arm 20 to which the magnetic head 21 is attached is biased by the spring 22. And shallow contact with the magnetic tape,
The protrusion 20c of the head arm 20 is a tape cassette 26.
Is not in contact with the same as when stopped.

[Fast-forward (see FIGS. 9, 16 and 18)] By rotating the motor 3 in the reverse direction from the rewinding state or the state of FIGS. 7 and 13, the main gear 6b rotates clockwise. 1 fast-forward gear 6ka and main gear 6
By the engagement of b, the fast-forward lever 10 is rotated clockwise. During the rotation of the fast-forward lever 10, the second fast-forward gear 6kb meshes with the rack gear 11b, and the fast-forward lever 10 moves to the restraint by its attachment drive. As shown in FIGS. 2 fast-forward gear 6k
b is engaged with the forward rotation reel drive gear 6g, and the forward rotation reel 7a is rotated at a high speed via the forward rotation reel gear 6h to perform fast forward. Also during this rapid traverse, the first and second pinch rollers 17a, 17b keep the first and second capstans 1a, 1a.
b, the head arm 20 to which the magnetic head 21 is attached is in shallow contact with the magnetic tape by the urging force of the spring 22, and the protruding portion 20c of the head arm 20 is in contact with the tape cassette 26. Not doing so is the same as stopping.

[Normal Reproduction (See FIGS. 11, 14, and 19)] In the above-described stop, rewind, and fast-forward states, the missing tooth portion 13cc of the cam gear 13c is connected to the third relay gear 1
Although the state is opposed to the small-diameter gear 13bb of 3b, from this state, the solenoid 13d is energized to release the attraction of the attraction piece 13da by the permanent magnet to the second cam 13ce of the shaft 13ea of the solenoid arm 13e. Rotates the cam gear 13c slightly clockwise. This state is shown in FIG.
c is engaged with the small-diameter gear 13bb, and the main gear 6 is rotated by rotating the motor 3 in the normal rotation direction.
b to the second and third relay gears 13.
a, and the cam gear 13c can be rotated clockwise. 11 and 14 show a state in which the motor 3 is further rotated in the normal rotation direction from this state, and the first toothless portion 13ca of the cam gear 13c is stopped at the meshing position of the small diameter gear 13bb of the third relay gear 13b. This is the normal rotation reproduction state shown in FIG. At the time of the transition to the forward rotation reproduction, the second control lever 11 once rotates counterclockwise from the state of FIG. 10 by the action of the fourth cam 13cg, and the first fast-forward gear 6k
a rotates the fast-forward lever 10 counterclockwise by engaging the main gear 6b with the third cam 13c.
Since the first control lever 23 rotates counterclockwise by the action of f, its tip shaft portion 23b fits into the concave groove 10c of the fast-forward lever 10 and regulates the fast-forward lever 10 as shown in FIGS. The normal rotation reproduction state shown in FIG. At this time, the second
Of the control lever 11 by the action of the fourth cam 13cg
The fast-forward lever 10 is swung in a direction in which the first fast-forward gear 6ka is disengaged from the main gear 6b.
Is not transmitted to the first and second fast-forward gears 6ka and 6kb, and its rotational load does not become the load of the rotational force of the motor 3. In the normal rotation reproducing position, the first cam 1
By the action of 3cd, the control rod 13h moves from the neutral position at the time of stop to the first capstan 1a side via the switching lever 13g, and as shown in FIG. 19, the first pinch roller arm control shaft 13ha The controller 16ab of the first pinch roller arm 16a pushes the first pinch roller 17a against the first capstan 1a, and the movement of the control rod 13h causes the play gear 6e via the relay lever 13i and the play lever 9 to move. Is meshed with the idle gear 6f, and the normal rotation reel 7a is normally rotated via the normal rotation reel driving gear 6g and the normal rotation reel gear 6h.
Perform normal rotation reproduction. The head arm control shaft 13hd pushes the control unit 20b of the head arm 20 (see FIG. 19), and pushes out the head arm 20 to which the magnetic head 21 is attached to the magnetic tape side against the urging force of the spring 22. Press 21 against magnetic tape. At this time, the projecting portion 20c of the head arm 20 comes into contact with the tape cassette 26, the relative position between the two is determined, and the magnetic tape is prevented from entering the magnetic head 21 beyond a predetermined value. Due to the spring action of the arm control shaft 13hd, the magnetic head 21 is also prevented from entering the tape cassette 26 by a certain amount or more.

[At the time of reverse reproduction (see FIGS. 12, 15, 20)] In the normal reproduction state, the solenoid 13d is energized to release the attraction of the attraction piece 13da by the permanent magnet, thereby connecting the cam gear 13c to the third relay gear. 13b, the motor 3 is further rotated in the normal direction from the time of normal rotation reproduction, and the second missing tooth portion 13cb of the cam gear 13c is stopped at the meshing position of the small diameter gear 13bb of the third relay gear 13b. This state is the reverse reproduction state shown in FIGS. In this reverse playback position, the control rod 13h is switched via the switching lever 13g by the action of the first cam 13cd.
Moves from the position on the first capstan 1a side to the second capstan 1b side via the neutral position at the time of stop, and FIG.
0, the second pinch roller arm control shaft 13
hb is the control unit 16b of the second pinch roller arm 16b
b, the second pinch roller 17b is pressed against the second capstan 1b, and the movement of the control rod 13h causes the play gear 6e to mesh with the reverse reel drive gear 6i via the relay lever 13i and the play lever 9. Then, the reversing reel 7b is reversed via the reversing reel gear 6j to perform reversal reproduction. Also, the head arm control shaft 13
hd pushes the control unit 20b of the head arm 20 (FIG. 20).
), A head arm 20 to which a magnetic head 21 is attached.
To the magnetic tape side against the urging force of the spring 22,
The magnetic head 21 is pressed against the magnetic tape. At this time, the protruding portion 20c of the head arm 20 comes into contact with the tape cassette 26, the relative position between the two is determined, and the magnetic tape is prevented from entering the magnetic head 21 beyond a predetermined value. Due to the spring action of the arm control shaft 13hd, the magnetic head 21 is also prevented from entering the tape cassette 26 by a certain amount or more.

It should be noted that, in this reverse reproduction state, the solenoid 1
When electricity is supplied to 3d and the suction of the suction piece 13da is released, the shaft 13ea at the tip of the solenoid arm 13e acts on the second cam 13ce, so that the cam gear 13c slightly rotates clockwise, and the small diameter gear 13bb and The small-diameter gear 13 meshes with the
bb rotates the cam gear 13c, and the third toothless portion 1
3cc stops at a position facing the small-diameter gear 13bb (that is, the stop state in FIG. 4). In this stopped state, even if the second control lever 11 is rotated counterclockwise by the fourth cam 13cg and the first fast-forward gear 6ka meshes with the main gear 6b, the fast-forward lever 10 is not Groove 10c
Since the shaft portion 23b of the first control lever 23 is fitted, the second fast-forward gear 6kb is
i so that the magnetic tape can be prevented from running alone.

The configuration and operation of the gear mechanism 6 and the mode switching mechanism 13 of the tape recorder according to the present embodiment have been described in detail. All of these driving forces are equivalent to the rotational force of the motor 3 and the first belt. 4a relays the large-diameter gear 5a of the relay gear pulley 5 driven via the large-diameter gear 2ba of the second flywheel 2b, the first relay gear 6a, and the main gear 6b. By transmitting the driving force of the driving system other than the first flywheel 2a to which the first capstan 1a is coaxially attached from the relay gear pulley 5, the running load of the magnetic tape can be reduced. . This means that the driving force of the drive system is transferred to the large-diameter gear 2 coaxial with the second flywheel 2b.
The same is true for a configuration in which data is directly transmitted from ba.

[0037]

As described above, the tape recorder of the present invention comprises a head arm which rotates at a predetermined angle about a rotation center as a fulcrum so as to be located at a reproduction position and a non-reproduction position with respect to a magnetic tape, and at least one head arm. A pair of capstans and a pinch roller arm that rotates by a predetermined angle around a rotation center so as to take a position of pressure contact and non-pressure contact with the capstan so as to feed the magnetic tape with the capstan. A pinch roller installed, and a tape cassette which holds the head arm and the pinch roller arm so as to be rotatable at a predetermined angle and is rotatably mounted on the substrate.
In a tape recorder provided with the holder body for moving the Tsu bets in the operating position and removable position, the magnetic head及
And in the tape running direction below the pinch roller arm.
A control rod for returning operation, and a position and a magnetic field for pressing against the capstan without biasing the pinch roller arm in the rotational direction.
While making the position away from the air tape rotatable,
A pinch roller arm control shaft acting on a control unit formed on the pinch roller arm is rotatably provided on a control rod.
Arm in the direction of the pinch roller.
And a pinch roller control shaft during reproduction.
When it comes into contact with the control unit formed on the pinch roller arm
The pinch roller is moved to the capstan by the biasing force of the spring.
Be sure to press against each other.
Roller is not pressed against the capstan and separated from the magnetic tape
So that the pinch roller arm and the pinch roller
Since the control shaft is set in the non-control state, the running load of the magnetic tape is small, the rotation transmission efficiency is improved, and the speed of the magnetic tape at the time of fast-forward or rewind can be increased.

Further, a guide cam is projected from a holder supporting base for rotatably holding the holder main body with respect to the substrate, and the tape cassette is moved to a mounting / removing position. If the engaging portion abutting on the guide cam is installed on the pinch roller arm so that it does not approach the capstan side more than necessary, a part that prevents the magnetic tape from entering the back side of the capstan when replacing the tape cassette or the like. The points can be effectively prevented.

[0039]

[Brief description of the drawings]

FIG. 1 is a plan view showing an appearance of a main part of a tape recorder according to an embodiment of the present invention.

FIG. 2 is a front view of a magnetic head unit showing a state seen from a back surface of the tape cassette.

FIG. 3 is a back view of the same.

FIG. 4 is a schematic plan view showing a state at the time of stop with the rapid traverse lever regulated.

FIG. 5 is a schematic plan view showing an operation state in which the motor is reversed from the stop state and the restriction of the fast-forward lever by the first control lever is released.

FIG. 6 is a schematic plan view showing a state at the moment of the release.

FIG. 7 is a schematic plan view showing a state after the release.

FIG. 8 is a schematic plan view showing a state at the time of rewinding.

FIG. 9 is a schematic plan view showing a state during the rapid traverse.

FIG. 10 is a schematic plan view showing a state at the time of transition from the state at the time of stop or rewind to the state of normal rotation reproduction.

FIG. 11 is a schematic plan view showing a state at the time of normal rotation reproduction.

FIG. 12 is a schematic plan view showing a state at the time of the reverse reproduction.

FIG. 13 is a schematic plan view mainly showing a state of rotating parts such as gears, and showing a stopped state after restriction of a fast-forward lever is released.

FIG. 14 is a schematic plan view showing a state at the time of normal rotation reproduction.

FIG. 15 is a schematic plan view showing a state during reverse reproduction.

FIG. 16 is a schematic plan view showing a state at the time of the rapid traverse.

FIG. 17 is a schematic plan view showing a state at the time of rewinding.

FIG. 18A is a schematic plan view mainly showing operating states of a pinch roller, a magnetic head, and the like, and shows a state of fast-forward, rewind, and stop, and FIG. 18B is a control rod of FIG. Plan view showing the operating state of the control shaft of the pinch roller arm

FIG. 19A is a schematic plan view showing a state at the time of normal rotation reproduction, and FIG. 19B is a partial plan view of FIG.

20A is a schematic plan view showing a state at the time of reverse reproduction, and FIG. 20B is a partial plan view of FIG.

FIG. 21A is an explanatory view of a positional relationship between a guide cam protruding from a holder support and an engaging portion provided on a pinch roller arm when the holder body is closed in the tape recorder of the present invention. FIG. 7C is a view similar to FIG. 7A when the holder body is opened, and FIG.

[Explanation of symbols]

 1a first capstan 1b second capstan 13h control rod 13ha first pinch roller arm control axis 13hb second pinch roller arm control axis 13hd head arm control axis 14a first holder support 14aa guide cam 14b first 2 holder support base 14ba guide cam 15 holder body 16a first pinch roller arm 16ac engaging portion 16b second pinch roller arm 16bc engaging portion 17a first pinch roller 17b second pinch roller 20 head arm 20b control Part 20c Projecting part 26 Tape cassette 27 Substrate

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-182957 (JP, A) JP-A-57-195356 (JP, A) JP-A-6-274973 (JP, A) 29647 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 15/29 G11B 15/44

Claims (2)

(57) [Claims] 1. A magnetic head comprising: a head arm that rotates at a predetermined angle about a rotation center as a fulcrum so as to be positioned at a reproduction position and a non-reproduction position with respect to a magnetic tape; at least one pair of capstans; A pinch roller rotatably mounted on a pinch roller arm that rotates by a predetermined angle about a rotation center as a fulcrum so as to take pressure contact and non-pressure contact positions with respect to the capstan, and the head arm and the pinch roller holding the arm freely rotated by a predetermined angle, and rotatably installed with respect to the substrate, Tepuka
In a tape recorder having a holder body for moving a set to an operation position and a detachment position, a tape is provided at a position below the magnetic head and the pinch roller arm.
The control rod reciprocating in the loop running direction and the pinch roller arm are pressed against the capstan without biasing in the rotation direction.
A contact rod and a position separated from the magnetic tape are rotatable, and a pinch roller arm control shaft acting on a control unit formed on the pinch roller arm is controlled by a control rod.
On the arm that is rotatably provided, and pinch the arm
A spring for urging in the direction of the roller , wherein the pinch roller control shaft is used for the pinch roller arm during reproduction.
When the spring comes into contact with the control unit formed in
Press the pinch roller against the capstan with
The pinch roller moves to the capstan during feed and rewind.
Make sure that the pin is not pressed and separated from the magnetic tape.
The control arm for the pinch roller and pinch roller
Tape recorder, characterized by being configured to Suyo. And a guide cam protruding from a holder support that rotatably holds the holder body with respect to the substrate, and the tape cassette is moved to a mounting / removing position. 2. The tape recorder according to claim 1, wherein an engaging portion that abuts on the guide cam is provided on a pinch roller arm so as not to approach the capstan side more than necessary.