JPH0316051A - Cassette tape recorder - Google Patents

Abstract

PURPOSE:To contrive the miniaturization and cost reduction of the subject device by operating a key-off releasing mechanism and a program searching mechanism with one set of an electromagnetic device. CONSTITUTION:The subject device possesses a moving means 129 for moving a head substrate 101 to a reproducing position, a 1st holding means for holding the head substrate 101 including the electromagnetic device 148 in the reproducing position, a program searching operation means for setting the program searching state from the reproducing state, a nonrecording detection means 172 for operating under the program searching state and a 2nd holding means for holding mechanically the program searching state by the program searching operation means and for releasing the program searching state by interlocking with releasing the head substrate 101 from its holding. Then, the electrification of the electromagnetic device 148 of the 1st holding means is cut off by a detection output of the nonrecording detection means, and also afterward the electromagnetic device 148 is electrified again so that the head substrate 101 moved to the reproducing position is held by the 1st holding means. By this method, the operation of the key-off releasing mechanism and the program searching mechanism are attained by one set of the electromagnetic device, so that the subject device is prevented from extending to a larger size.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a cassette tape recorder having a cue mechanism and a key-off release mechanism.

(B) Conventional technology Conventionally, as disclosed in Japanese Patent Publication No. 60-37532, a mechanism (key-off release device #R) that automatically returns the head to the stop position when the power switch is turned off has been provided. A tape recorder is developed. This involves transmitting the rotational force of the motor to a transmission mechanism to move the head board to the playback position, then holding that position by an electromagnetic device, and then stopping the head board by cutting off the power to this electromagnetic device. I'm trying to get it back into position.

Incidentally, recently it has become popular to add a cueing mechanism, and a cueing mechanism is further added to the above structure.

(c) The problem to be solved by the invention is that the cueing mechanism requires an electromagnetic device such as a plunger to release the fast-forwarding or rewinding state upon detection of an unrecorded portion, and the key-off release mechanism In addition to the electromagnetic device, two magnetic devices were required.

Therefore, this resulted in an increase in the size of the device and an increase in cost.

(2) Means for Solving the Problems The cassette tape recorder of the present invention includes a head substrate on which a head is placed, a driving means, a driving force of the driving means is transmitted to the head substrate, and a head substrate. a first holding means that includes an electromagnetic device and holds the head substrate at the playback position; a cueing operation means that sets the head board from the playback state to the cueing state; a recording detecting means; a second holding means for mechanically holding the cueing state by the cueing operation means and releasing the cueing state in conjunction with release of holding of the head substrate; control means for cutting off power to the electromagnetic device of the first holding means based on the detection output, and then energizing the electromagnetic device again to cause the first holding means to hold the head substrate that has been moved to the reproduction position by the moving means; It has the following.

(E) Function The present invention is constructed as described above, and the key-off release mechanism and cue mechanism can be achieved by a single electromagnetic device.

(F) Embodiment An embodiment of the present invention will be described based on the drawings. FIG. 1 is a plan view of the cassette tape I/coder in a stopped state, and FIG. 2 is a side view of the cassette tape recorder seen from direction A in FIG. 1, where (100) is the main board.

(101) is an inverted L-shaped head substrate provided on the main substrate so as to be movable back and forth in the left-right direction in FIG. 1, and a magnetic head (102) is provided on the upper surface. And this head board (
101) has a stop part (103) on one side and the main board (
The engagement pin (100) is pushed into the elongated hole (1.04).
105), and an abutment piece (106) on the other side.

(107) (207) is the cab stan shaft, (108) (
208) is a pinch roller disposed opposite to the capstan shafts (107) (207), and
Vinci arm (109) rotatably supported on (2)
09) is rotatably supported on the shaft.

The upper pinch arm (109) in FIG. 1 is provided with a projecting piece (109a) on the side opposite to the rotation end.

(110) (210) is a reel shaft, and as shown in FIG.
11), and a reproduction reel shaft gear (112).
(212), high distance feed reel shaft gear (113) (213
) are installed coaxially. Also, one reel shaft (210
) is a stop part (103) of the head board (101) when the reproducing reel shaft gear (212) is stopped.
A stop table (210a) is provided, which is in contact with the stop table (210a). (1
Reference numeral 15) denotes a main reproduction rotation plate rotatably supported on the main substrate (100), and has a rectangular notch hole (116) formed at one end. (117) is a sub-regeneration rotation plate rotatably supported on the other end of the main reproduction rotation plate (115);
218) is a regeneration gear that is pivotally supported at both ends of the secondary regeneration rotating plate (117) and meshes with each other, and one regeneration gear (11
8) meshes with the transmission gear (119). Then,
By rotating the main regeneration rotating plate (115) in the clockwise direction in FIG.
) meshes with the playback reel shaft gear (112), and when rotated counterclockwise, the playback gear (118
) and the transmission gear (119) are engaged, the regeneration gear (
218) meshes with the reproduction reel shaft gear (212). (120) has one side connected to the head substrate (101).
The reproducing board is rotatably supported by a shaft, and the other end thereof is provided with a cam pin (121) that engages with the notch hole (116) of the main reproducing rotating plate (115).

(122) is a spring bar provided on the shaft of the recycled board (120), and its both ends are locked to both ends of one side of the recycled board (120), and the pinch arm (109) (209) is rotated. It is fixed at the end. Thus, the recycled substrate (120)
When rotated clockwise in Fig. 1, the spring stopper (1
22) causes the pinch arm (209) to rotate in the direction in which the pinch roller (208) comes into contact with the capsun shaft (207), and when rotated counterclockwise,
A pinch roller (108) is connected to the capstan shaft (107).
) The Vinci arm (109) will rotate in the direction in which it comes into contact with the holder. (123) has one side connected to the main board (100).
A high-speed feed rotary plate is rotatably supported on the main board on the lower side of the
), and an operating rod (126) extends from one side. (127) is, for example, JP-A-60-113349
A control plate that slides vertically in FIG. 1 by a tape end detection mechanism (not shown) as disclosed in the above publication, and has a cam hole (128) that guides a cam pin (121) of the recycled board (120). ). This cam hole (
128) is provided with a recessed portion (128a) at its tip portion to engage with the cam pin (121), and these four portions (128a)
It is tilted outward from the top. (129) is a head moving member coaxially supported with the lower Vinci arm (209) in FIG.
A pressing part (130) that can come into contact with the contact piece (106) is provided, and a guide piece (131) that extends upward in FIG. 2 is provided at the upper part.

(132) is a switching member rotatably supported on a sub-board (133) provided above the main board (100) in FIG. 2, and a guide piece (134) extending upward is provided on one side;
A moving piece (135) extending downward is provided at the other end. (136) is the movable piece (1) of the switching member (132).
35) and the operating rod (126) of the high-speed feed rotation plate (123)
The sliding movement connected to the moving piece (135) slides and rotates the high-speed feed rotating plate (123).

(137) and (237) are high-speed feed levers for high-speed feed in opposite directions, and coil springs (138) and 2
38) in the downward direction in FIG. 1, and by moving upward in the same figure, the head moving member (1
An engagement hole (139) that engages with the guide piece (131) of the head moving member (129) and rotates the head moving member (129) counterclockwise.
) (239), and an engaging claw (140) (24
0) is provided. Then, one high distance feed lever (1
37) includes a guide piece (134) of the switching member (132).
) is provided with a notch (137a) that rotates this switching member (132), and the other high-speed feed lever (
237) includes hanging pieces (237) that abut against both ends of the other side of the switching member (132) and rotate the switching member (132) in a direction opposite to the one high-speed feed lever (137).
237a0237b) is provided. A holding member (141) is rotatably supported on the main board (100), and is biased counterclockwise in FIG. 1 by a coil spring (142).

In FIG. 2, this holding member (141) is provided with a locking piece (143) on the upper part that can be engaged with the locking claws (140) (240) of the high-speed feed lever (137) (237), At the bottom is a protruding piece (1) of the Vinci arm (109).
09a) is provided with an abuttable abutment piece (144). As shown in FIG.
When the locking piece (141) is rotated clockwise, the locking piece (143)
is the locking claw (14) of the high distance feed lever (137) (237).
0) (240), so even if the high distance feed lever (137) or (237) is moved upward in FIG.
0) (240) does not engage. And Vinci arm (
109) clockwise, the protruding piece (109a)
) is released from the contact piece (144), and the locking piece (143) comes into contact with the high-speed feed lever (137) (237) due to the biasing force of the coil spring (142). Therefore, the high distance feed lever (137) or (237)
When the is moved upward in FIG. 1, the locking piece (143
) and the locking pawl (140) or (240) engage to maintain the moving state of the high-speed feed lever (137) or (237).

(145) is a partially toothed gear pivotally supported on the main board (100), and has a thinly wound rotary cam (146) and a locking protrusion (147) on its upper surface. (148) is an electromagnet fixed to the main board (100) by a method not shown; (149)
is a holding plate rotatably supported on the main board (100), which is biased clockwise in FIG. (151), and a regulating piece (152) that engages with the locking protrusion (147) of the toothless gear (145) is provided on the lower surface. (153) is the main board (1
The cam engagement plate is rotatably supported on the cam engagement plate (00), is biased counterclockwise in FIG.
46) is provided. or,
A spring rod (156) is wound around the shaft of this cam engagement plate (153), and one end of this spring rod (156) is locked to the cam engagement plate (153), and the other end is attached to the cam engagement plate (153).
) of the head board (101) together with the other end of the engagement pin (10
5).

Fig. 4 shows the rotation transmission path in the state shown in Fig. 1 (stop condition!!) (black dots are attached to the meshing points of the gears), (157) is the motor, (158) is the motor pulley, ( 159) is a driven pulley, (160) is a drive gear provided coaxially with the driven pulley, (161) (162)
) is an integrated gear, and (163) and (164) are integrated gears.

(165) is a guide boley, (166) (266) is a flywheel fixed to the capsun shaft (107) (207), and has a belt groove and teeth on the outer periphery.

Then, the motor pulley (158) and the driven pulley (159)
) rotates in conjunction with the endless belt (167), and the motor pulley (158) and each flywheel (166)
(266) and the guide pulley 9 (165) are rotated in conjunction with each other via a separate endless belt (168), and the respective cab stan shafts (107) (207) are rotated in opposite directions.

On the other hand, the rotation of the driven pulley (159) is controlled by the drive gear (16).
0), gear (161) (162) (163) (164)
, regeneration gear (11B) (
218).

For example, when playing in one direction, as shown in FIG.
Also, during rapid feed in the state shown in Fig. 5, the rotation of the motor pulley (158) is transmitted to the flywheel (166), the first and second high speed feed gears (124) (1), as shown in Fig. 6.
25) to the high-speed feed reel shaft gear (113).

FIG. 7 shows a block diagram, where (168) is a power switch and (169) is a motor switch, which are set to be turned on when a cassette tape is loaded in a predetermined position. (170) is a preamplifier that inputs the output of the magnetic head (102), and (171) is the preamplifier (17).
0), and (172) is an unrecorded detection circuit that detects unrecorded parts based on the output of the pre-amplifier (170), which is activated by the cue switch (173) to detect unrecorded parts. Outputs a positive pulse when (174) is a switching circuit that controls energization of the motor (157) and electromagnet (148) based on the output of the no-recording detection circuit (172), and a positive pulse is output from the no-recording detection circuit (172). When the specified time (
For example, about 500ms) motor (157) and electromagnet (
148).

Next, the operation in the above structure will be explained (hereinafter, the direction of operation will be explained with reference to FIG. 1).

First, in the stopped state as shown in Figure 1, turn on the power switch (168
) is turned on and the cassette tape is installed in the specified position.
The motor (157) is connected to the motor (157) via the power switch (168), motor switch (169) and switching circuit (174).
) and the electromagnet (148) are energized.

Therefore, the toothless gear (145) is driven by the drive gear (160).
rotates counterclockwise, and the suction part (
15l) will be attracted to the electromagnet (148).

Therefore, the rotation of the toothless gear (145) causes the cam engagement plate (
The circular part (155) of 153) slides along the rotating cam (146), and this cam engagement plate (153) rotates clockwise against the biasing force of the coil spring (154). . As a result, the spring +'41 (156) presses the engagement pin (105) of the head substrate (101) to the left, and moves the head substrate (101) to the left. When the toothless portion of the toothless gear (145) faces the drive gear (160), the locking protrusion (147) and the regulating piece (152) engage with each other as shown in FIG. (145) is prevented from rotating, and the head substrate (101> is held at the playback position 1,...
A magnetic head (102) is pressed against the tape.

Incidentally, if the control board (127) is set in the state shown in Fig. 1, when the head board (101) moves to the left,
The cam bin (121) of the recycled board (120) is inserted into the recess (
128a), and this recycled substrate (128a)
0) rotates counterclockwise as shown in FIG. Therefore,
The main regeneration rotation plate (115) rotates clockwise to engage the regeneration gear (118) with the regeneration reel shaft gear (112), and connects one pinch roller (108) with the capstan shaft (112).
07) to support the tape. This brings about a regeneration state, resulting in a rotation transmission path as shown in FIG.

In this reproducing state, the pinch arm (109) rotates clockwise due to the movement of the head board (10l) to the left, causing the protruding piece (109a) to come into contact with the holding member (141). The contact piece (144) does not abut.

Furthermore, in the above structure, the tape winding speed by the reel shaft (110) is set faster than the tape feeding speed by the pinch roller (108) and capsun shaft (107), so that the head board (101) During movement, the tape is supported by the pinch roller (108) and the cab stun shaft (107) faster than the engagement between the playback gear (118) and the playback reel shaft gear (112). Prevents noise from being generated. Furthermore, when the cassette tape is installed, the tape end detection mechanism starts operating, and the J-leaf axis (110) (210
) stops for a predetermined time (generally about 1 second), the control board (127) is moved to perform a reverse operation, so in the above structure, the regeneration gear (118
) (218) is the reproduction reel shaft gear (112) (212)
I try to make it fit in with the That is, the motor tab (1
58), by setting the size and number of teeth of the driven pulley (159), drive gear (160), and toothless gear (145),
The head substrate (101) is moved so that the reproduction gear (11B) (218) meshes with the reproduction reel shaft gear (112) (212) within a predetermined time.

Next, when the high-speed feed lever (137) is pressed upward in the regenerating state, the switching member (132) rotates clockwise through the notch hole (137a) as shown in FIG. 9, and the sliding plate (136)
is slid downward, and the downward sliding of this sliding plate (136) causes the high-speed feed rotary plate (123) to rotate clockwise, creating a rotation transmission path as shown in Fig. 6. . In addition, the engagement hole (136) is connected to the head moving member (129).
) in the counterclockwise direction, the suppression part (13
0) presses the abutting piece (106) of the head board (101) to the right and holds the head board (101) against the spring bar (156).
) to move it to the right side.

As a result, as shown in FIG. 10, the recycled substrate (120)
The cam pin (121) and the recess (12) of the cam hole (128)
8a) is released, and the regenerated board (120) returns to approximately the same position as the stopped state due to the restoring force of the spring rod (122), and the regenerated gear (118) and regenerated reel shaft gear (112)
The engagement with will be released.

In addition, the pinch roller (108) and the cab scan shaft (107)
) will be separated. At this time, the head board (10
1) moves only a little, so the magnetic head (102)
lightly contacts the tape, and the protruding piece (109a) of the Vinci arm (109) and the holding member (141) do not come into contact with each other, and the locking claw (140) of the high-speed feed lever (137)
) is engaged with the locking piece (143) of the holding member (141),
The moving state of this high-speed feed lever (137) is maintained.

This results in a fast-forward state.

In this fast-forward state, the cue switch (1
73) is turned on, the non-recording detection circuit (172) is activated. This non-recording detection circuit (17
2) detects an unrecorded portion and outputs a positive pulse, the switching circuit (174) switches the motor (157) for a predetermined period of time.
And the power supply to the electromagnet (148) is cut off.

Then, the attraction portion (151) of the holding plate (149) is released from the attraction of the electromagnet (148).

Therefore, the cam engagement plate (153) is a coil spring (154).
Since the rotary cam (146) is urged counterclockwise by the urging force of The holding plate (149) is rotated counterclockwise via the regulating piece (152) of the holding plate (149). This results in
The regulating piece (152) of the retaining plate (149) and the toothless gear (14)
The engagement of the locking protrusion (147) of 5) is released, and the partially toothed gear (145) and the drive gear (160) mesh with each other. Further, the circular portion (155) of the cam engagement plate (153) has a coil spring (
154) into the smallest diameter part of the rotating cam (146), and the other end of this cam engagement plate (153) moves the head base plate (101) to the stop position shown in FIG. By moving the head board (101) to the stop position, the protruding piece (109) of the pinch arm (109)
a) presses the abutment piece (144) of the holding member (141) and rotates the holding member (141) clockwise, so that the locking piece (143) of the holding member (141) and the high speed The engagement of the locking pawl (140) of the feed lever (137) is released. Therefore, the high distance feed lever (13
7) is returned to its original state by the coil spring (138), resulting in the state shown in FIG.

Furthermore, by moving the head board (101) to the stop position,
The stop portion (103) of the head substrate (101) comes into contact with the stop base (210a) of the reel shaft (210) and forcibly stops the rotation of the reel shaft (210).

Next, after a predetermined period of time has elapsed, when the switching circuit (174) energizes the motor (157) and electromagnet (148) again, the state shown in Fig. 1 shifts to the playback state as described above, and the song is played from the beginning. In addition, in the above structure, only one reel shaft (210) is forcibly stopped by the stop part (103);
) is on the winding side, no more tape is wound, and when on the supply side, no more tape is fed, so as a result, the tape moves relative to the magnetic head (102). This means that the song can be reliably played from the beginning.

Next, when the power switch (168) is turned OFF in the playback state shown in Fig. 8 or the fast forward state shown in Figs. As in step 1-, the state shown in FIG. 1 will be returned. Also, when the eject mechanism (not shown) is operated to eject the cassette tape, the motor switch (169) is turned OFF, so the state returns to the state shown in FIG. 1.

In addition, in the above structure, the control plate (1
27) moves upward, the cam pin (121) is guided into the cam hole (128) in the opposite direction to the above case.
The recycled board (120) will rotate clockwise,
The reproduction gear (218) meshes with the reproduction reel shaft gear (212), and the running direction in the reproduction state is reversed. The key-off release operation is the same as described above.

Although FIG. 11 and FIG. 12 show another embodiment, it basically has the same structure as the embodiment described above, and the same members are represented by the same reference numerals. FIG. 11 shows a plan view of the main part in a fast forward state, and an auxiliary switch (175) is arranged in relation to the head board (101'l).This auxiliary switch (175) is as shown in FIG. ONI, when the head board (101) moves a little to the right as in the fast forward (rewind) state, 1; head board (101) as in the playback state.
101) is set to turn OFF when it moves to the left.

This auxiliary switch (175) is connected in series to the cue switch (173) as shown in FIG. This is provided to prevent malfunctions that occur when the cue switch (173) is turned on and the high speed feed 1/bar (137) is pressed to perform the cue operation in the embodiment described above. In other words, the high-speed feed lever (1
37), the reproduction reel shaft gear (112),
High-speed feed reel shaft gear (113) and regeneration gear (118)
, a state occurs in which the engagement with the second high-speed feed gear (125) is released and the reel shafts (110) (210) become free. Therefore, if the high-speed feed lever (137) is pressed slowly, this state will remain for a long time, in other words, the tape running will be stopped for a long time. The role of the auxiliary switch (175) in this state is to
Normally, even if there is a very short unrecorded part that is not an unrecorded part between songs, the unrecorded detection circuit (172) determines that it is between songs and cuts off the power to the motor (157) and electromagnet (148). This prevents such malfunctions. That is, even if the cue switch (173) is ON, the head board (101) moves to the position of the fast feed state (the state where the high speed feed reel shaft gear (113) and the second high speed feed gear (125) are engaged). However, the non-recording detection circuit (172) does not operate unless the auxiliary switch (175) is turned on, thereby preventing the above-mentioned malfunction.

In FIG. 12, a diode (176) is connected in series to the motor (157), which means that if the cassette tape is ejected by the eject mechanism and the mork switch (169) is turned off, motor(
This is to prevent the electromagnet (148) from being excited by the back electromotive force of the magnet (157). That is, normally, the Ijiek I mechanism first moves the cassette tape a little to turn off the motor switch (169), and then turns the head board (101) to the first position.
After moving the cassette tape to the position shown in the figure,
This is because if the electromagnet (148) is excited by the back electromotive force of the motor (157), it will become difficult to operate.

In each of the embodiments described above, only the case where the high-speed feed lever (137) was operated was described, but the operation is the same when the high-speed feed lever (237) is operated.

(G) Effects of the Invention The present invention has the above-mentioned grooves, and the key-off release mechanism and cue mechanism can be achieved by one electromagnetic device, thereby reducing the size and cost of the device. be able to.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the tape recorder of the present invention in a stopped state, FIG. 2 is a side view similarly seen from the direction A in FIG. 1,
FIG. 3 is a cross-sectional side view of the main part of the reel shaft, FIG. 4 is a diagram showing the rotation transmission path in the stopped state, and FIG. 5 is a diagram showing the rotation transmission path of the main part in the playback state.
Fig. 6 is a diagram showing the rotation transmission path of the main part in the fast-forward state, Fig. 7 is a block diagram, Fig. 8 is a plan view of the main part in the playback state, and Fig. 9 is a plan view of the main part in the fast-forward state. FIG. 10 is a plan view of the main part in the fast-forward state, FIG. 11 is a plan view of the main part of another embodiment in the fast-forward state, and FIG. 12 is a block diagram. (101)... Head substrate, (102)... Magnetic head, (106)... Contact piece, (109) (209)
... Pinch arm, (109a) ... Projection piece, (1
29) Head moving member, (130) Pressing part, (137) (237) High speed feed lever, (14)
5) ... Missing tooth gear, (146) ... Rotating cam, (1
47)...Latching protrusion, (148)...Electromagnet, (
149)...Retaining plate, (152)...Regulation piece, (1
53)...Cam engagement plate, (156)...Spring support, (
157)...Motor, (160)...Drive gear, (
172)...No recording detection circuit. (174)...Switching circuit.

Claims (1)

[Claims] (1) A head substrate on which a head is placed, a driving means, a moving means for transmitting the driving force of the driving means to the head substrate and moving the head substrate to a playback position, and an electromagnetic device to move the head substrate. a first holding means for holding at the playback position;
a cueing operation means for setting a cueing state from a playback state;
a non-recording detecting means in a cueing state; a second holding means for mechanically holding the cueing state by the cueing operation means and releasing the cueing state in conjunction with release of holding of the head substrate; The electromagnetic device of the first holding means is de-energized by the detection output of the non-recording detecting means, and then the electromagnetic device is energized again to move the head substrate, which has been moved to the playback position by the moving means, to the first holding means. A cassette tape recorder comprising control means for holding the cassette tape recorder.