JPS61105756A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To simplify and miniaturize the structure of device by constructing the structure so that the selection of moving direction of the movable parts is done by the position of transferring parts. CONSTITUTION:A reel table supporting plate 36 which has been supporting a supply reel table 38 moves against a tension spring 37 by the power of the drive. By this movement of the plate 36, a part of a lever 39 contacts with a part of the plate 36, and the lever 39 rotates clockwise. And then, a part 39a of it contacts with a part 40b of a movable body 40 and the body 40 rotates anti-clockwise. And then a part of it contacts with a cam part 31 of a gear 32. Also the part 31 meshes with small gears 29, 32 which is formed in one body with gears 28, 30, therefore the rotation power of flywheel 26 is conveyed to the part 31, causing the clockwise rotation. And then a part of the cam part 31 contacts with a part of the body 40, and the body 40 moves against the spring 42 by the rotation power of the part 31. As a result, the part 40a contacts with forward/reverse switching part 65, and the part 65 is forced to move against the spring. At this moment, the state is changed to reverse by the engaging relation of the edge part of the part 65 and the edge pat of head block.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording/reproducing device, and more particularly to an automatic forward/reverse switching and automatic stop mechanism.

Conventional technology In recent years, tape recorders have been used for long-time recording, cassette...
There is a demand from the market for a compact and lightweight device that is equipped with an automatic forward/reverse switching mechanism to save the trouble of replacing the A and 3 sides of the disc, enables continuous playback and continuous recording, and is designed with an emphasis on portability. . In particular, micro cassette tape recorders are small and lightweight, making them suitable for long-term recording of meetings and the like.

Referring to the drawings below, go to the conventional My 3 mentioned above. An example of a black cassette tape recorder will be explained.

9, 10, and 11 show a tape end detection mechanism of a conventional microcassette tape recorder. In FIG. 9, the flywheel is a single flywheel, which is rotated clockwise by the rotational force of a motor (not shown) via a belt (not shown). This flywheel 1
The rotation axis of is configured as a capstan shaft 2, and has a gear 3 around the root of the capstan 'tQI+2. A gear 5 having a small gear 4 transmits the operating force of the gear 3 to a gear 7 having a cam portion 6.

On the pins 10 and 11 of the board 9, there is a reel stand holding plate 12,
The elongated holes 12a, 12b and the pins 10.degree. 11 are supported so as to be movable in the direction of arrow A1, and normally biased in the direction A by a tension spring 13.

It is an 8-piece supply reel stand, and is rotatably mounted on the reel stand holding plate 12. Reference numeral 14 designates an operating lever that transmits the movement of the reel stand holding plate 12 to the movable body 15, and is rotatably held by a pin 16 on the substrate 9.

The movable body 16 is rotatably and slidably mounted in a contact relationship between the pin 17 of the substrate 9'' and the elongated hole 15a of the movable body 16,
The part 15b of the movable body 15 is biased in the C direction and clockwise by the tension spring 18, so that the part 15b of the operating lever 14
It is in pressure contact with a. 19 is a lock lever, and the board 9
It is rotatably held by a soil pin 2o, and a tension spring 21
The bent portion 19a of the lock lever 19 is urged to rotate counterclockwise by the lock lever 19, and is in pressure contact with a portion 22a of the operating member 22. The operating member 22 also has a tension spring 2 due to the engagement relationship between the elongated holes 22a and 22b and the pins 23 and 24 on the board 9.
5 in the E direction.

The operation of the tape end detection mechanism of the micro cassette tape recorder configured as described above will be explained below.

First, at the end of the tape in the playing state, capstan shaft 2
Due to the tape driving force generated by pressure contact between the supply reel stand 8 and the pinch roller (not shown), the reel stand holding plate 12 that holds the supply reel stand 8 moves in the direction B against the tension spring 13.

As the reel stand holding plate 12 moves, a part 14b of the operating lever 14 and a part 12c of the reel stand holding plate 12 come into contact with each other as shown in FIG. 1o, so that the operating lever 14 rotates clockwise. A portion 14a of the operating lever 14 contacts a portion 15b of the movable body 16, rotates the movable body 16 counterclockwise, and a portion 150 of the movable body 15 contacts the cam portion 6 of the gear 7.
and meet.

The rotational force of the flywheel 10 is transmitted by the meshing of the six gears 3 and gear 6 of the cam part which have been disengaged, and the small gear 4 and gear 7 on the gear 6, and rotates clockwise to rotate the part 6a of the cam part 6 and the movable body. A portion 160 of the movable body 16 comes into contact with the movable body 16, and the rotational force of the cam portion 6 causes the movable body 16 to move in the D direction against the tension spring 18. The movable body 16 moves in the D direction and a part 16d of the movable body 16
comes into contact with a portion 191L of the lock lever 19, causing the lock lever 19 to rotate clockwise against the tension spring 21.

When the lock lever 19 rotates as shown in FIG. 11, a part 19a of the lock lever 19 and the operating member 22
The operation member 22 is disengaged from the part 22c, and the tension spring 25 moves the operating member 22 in the E direction, and the operating member 22 comes to a stopped state.

Problems to be Solved by the Invention However, with the above configuration, the operating member is only unlocked at the end of the tape, and the operation is only changed from the playback state to the stop state and from the recording state to the stop state.
In recent years, long-term recording and half-cassette recording have been strongly requested by the market.

The problem is that it does not have a structure that can provide an automatic forward/reverse switching mechanism that saves the effort of replacing the B side.

In view of the above-mentioned problems, the present invention reduces the overall size of the device.

It is lightweight and has a simple configuration, making it suitable for long-term recording.It also has an automatic forward/reverse switch that eliminates the need to replace side A and B of a cassette half, and an automatic stop option at the end of the tape, meeting market needs. The purpose of this invention is to provide a magnetic recording/reproducing device.

Means for Solving the Problems In order to solve the above problems, the magnetic recording and reproducing apparatus of the present invention includes a rotating body that rotates in association with the running of a magnetic tape and a movable body that is normally separated from the rotating body. , an operating means for bringing the movable body into contact with the rotary body, a moving member movably holding the movable body, and a moving member that moves the movable body from the first position to the first position depending on whether or not there is detection by the detecting unit. When the movable body is brought into contact with the rotary body by the operating means in the first position, the movable body is moved in the first direction by the operating force of the rotary body and the movable body is moved to the first target position. When the operating member (direction/reverse switching mechanism) is actuated, the movable body is positioned at the second position by the selection means, and the movable body comes into contact with the rotating body by the operating means, the operating force of the rotating body causes the movable body to move to the second position. The moving direction of the movable body is selected based on the position of the movable member so that the second operated member (automatic stop mechanism) is actuated.

Effect of the Invention The present invention has the above-mentioned configuration, which allows selection of the forward/reverse switching means and the automatic stopping means depending on the state of the moving member, thereby eliminating the need for a separate mechanism or member for selection, and greatly simplifying the configuration of the device. It is possible to realize miniaturization.

EXAMPLE Hereinafter, a magnetic recording/reproducing apparatus according to an embodiment of the present invention will be explained with reference to the drawings.

FIG. 1 shows 11! at the tape end of a magnetic recording/reproducing apparatus according to a first embodiment of the present invention. This figure shows a selection mechanism for converting I to J and automatically stopping it.

In Figure 1, 26 is a flywheel and a belt (
It is rotated clockwise by the rotational force of a motor (not shown) via a motor (not shown). This flywheel 26
The rotating shaft is configured as a capstan shaft 27, and a gear 28 is provided around the root of the capstan shaft 27. The operating force of the gear 28 having a small gear 29 is transmitted to the gear 32 having a cam portion 31.

The reel stand holding plate 36 is supported by the pins 34 and 35 of the second vane of the substrate 339 so as to be movable in the direction of the force indicated by the arrow GH due to the engagement relationship between the elongated holes 36a and 36b and the pins 34 and 36. It is biased in the G direction by a spring 37. A supply reel stand 38 is rotatably attached to the reel stand holding plate 36j.

Reference numeral 39 denotes an operating lever that transmits the movement of the reel stand holding plate 36 to the movable body 4o, and is rotatably held by a pin 41 on the base plate 33. The movable body 4o is connected to the pin 4 on the movable part 46.
1 and the elongated hole 401N of the movable body 4o, it is rotatably and slidably attached to the movable body 4o, and is biased clockwise and clockwise by the tension spring 42, so that the part 40b of the movable body 4o is operated. It is in pressure contact with a part 39a of the lever 39.

A lock lever 42 is rotatably held by a pin 43 on the base plate 33, biased to rotate counterclockwise by a tension spring 44, and restricted from rotating by a pin 46 on the base plate 33. Moving member 46, elongated holes 46a, 46b and substrate 3
Due to the engagement relationship with pins 47 and 48 on 3 (tension spring 4
9 is biased in the direction 10 l\ 7. Further, 60 is a recording member, and a long hole 60
A, 6ob is biased in the M direction by a tension spring 63 due to the engagement relationship with the pins 51, 62 on the board 33. The actuation plate 54 has a long hole 64a.

64b and the pins 66.56 on the board 33, so that they can be slid in the direction of the arrow MN. Further, the end 6OC of the recording member 6o and the pin 67 of the actuating plate 54 are elastically connected by a spring 68 so as to abut and engage with each other. 69, the safety piece 81 (
6), it is biased clockwise by a torsion coil spring 61 and rotation of the board 33 is restricted by a ground pin 62. Further, when the safety piece 81 is present, the end sia of the safety piece 81 and a portion 69a of the detection member 69 come into contact as shown in FIG. A selection member 63 is rotatably held by a pin 64 on the substrate 33.

66 is a forward/reverse switching member. In FIG. 6, the forward/reverse switching member 66 connects to the long holes ESA, S6B and the substrate 3311.

It is attached so as to be slidable in the direction of the arrow OP force due to the engagement relationship with the soil pins 66 and 67. 68 is the forward/reverse switching member 6
This is a spring that moderates the movement of 6, and normally biases it in the 0 direction. 69 is a slide switch that switches the rotation direction of the motor (not shown) between forward rotation and reverse rotation, and when the front skin switching member 66 slides in the direction of arrow El] OP, the end portion 65
c, slide switch 6 by coming into contact with 66d.
9 is switched to rotate a motor (not shown) forward or reverse.

70 is a forward recording/reproducing head 71. Erasing head 729 reversing recording/reproducing head 73. This is a bed block equipped with an erasing head 74, and a pinch roller 76 is rotatably held by a pin 75.

The long hole 70a of the head block 7o has a lever 78 rotatably attached to the board 33- by a pin 77.
It is in engagement relationship with the upper pin/79.

The spring 80 applies a biasing force to the head block so as to press the pinch roller 76 against the capstan shaft 2.

The operation of the magnetic recording and reproducing apparatus configured as described above will be explained below.

First, in FIG. 1, at the end of the tape in the playing state, the reel stand holding plate 36 holding the supply reel stand 38 is moved by the tension spring 37 due to the tape driving force caused by the pressure contact between the capstan shaft 2 and the pinch roller (not shown). Move in the N direction against the resistance. A portion 39 of the operating lever 39 is moved by the movement of the reel stand holding plate 36.
b comes into contact with a portion 36C of the reel stand holding plate 36, the operating lever 39 rotates clockwise, and the portion 39
a comes into contact with a part 40b of the movable body 40, rotating the movable body 40 in the counterclockwise direction, and a part 4oC thereof comes into contact with the cam part 31 of the gear 32. In addition, the cam portion 31 is connected to the gear 28 and the gear 3.
0, and the rotational force of the flywheel 26 is transmitted by the meshing of the small gear 29 and the gear 32, which are formed integrally with the gear 3o, and rotates clockwise, so that a part 31a of the cam part 31 and a part of the movable body 40 are rotated clockwise. 400 comes into contact with the movable body 40, and the movable body 40 moves in the N direction as shown in FIG. 4 against the tension spring 42 due to the rotational force of the cam portion 310. As the movable body 40 moves in the N direction, a part 40a of the movable body 40 contacts a part 65a of the forward/reverse switching member 65 and switches between the forward and reverse directions against the spring 68, as shown in FIG. The member 66 is moved in the P direction, and the forward/reverse switching member 65 is urged in the P direction by the spring 68. At that time, the ends 65θ, 66f of the forward/reverse switching member 66
When the forward/reverse switching member 66 is biased in the P direction due to the engagement between the end portions 70b, 700 of the head block 7o, the reversed state shown in FIG. 8 is reached.

FIG. 7 shows a mechanism in which the pinch roller 76 and the capstan shaft 27 are brought into a state of primary separation by the contact relationship between the end 65g of the forward/reverse switching member 66 and the lever 78 while the forward/reverse switching member 66 is moving in the P direction. It shows.

When the force was applied to the separated state, the force that was biasing the reel stand holding plate 36 holding the supply reel stand 38 in the N direction due to the tape driving force is released, and the reel stand holding plate 36 is forced to release the tension spring 3
7, it is moved and biased in the G direction. The adjustment lever 39 and the movable body 4o are returned to their original states as shown in FIG. 1 by the biasing force of the tension spring 42. Further, the switching part 69a of the slide switch 69 comes into contact with the end 650 of the forward/reverse switching member 66 and slides in the P direction 14 l//, so that the rotation direction of the motor (not shown) is reversed and the flywheel 26 is reversed. , the vehicle enters a reverse running state.

Next, the recording state will be explained. 1. If there is no safety piece on the A side of the case recorder, the A side safety piece detection member (not shown) detects that the safety piece is too large and prevents the recording member 50 from moving in the ON direction. An A-side safety piece detection member (not shown) is configured.

If there is a safety piece on the A side of the cassette half and there is also a safety piece on the 8th side, when you perform a recording operation, the recording member 50
moves in the N direction and is held in the state shown in FIG. B
Due to the contact with the surface safety piece 81, a portion 59b of the detection member 59 and a portion 540 of the actuating plate 54 come into contact with each other as shown in FIG. 6, thereby preventing the actuating plate 64 from moving in the N direction. Therefore, when there is a safety piece on the A side of the cassette half and there is also a safety piece on the 8th side, when recording is performed, the position of the moving member 46 at 157, -7 will be as shown in Figures 1 and 4. become,
As in the case of the above-mentioned reproduction state, the forward/reverse switching member 65 is activated at the end of the tape on side A, and recording on side 8 is automatically started.

Next, if there is a safety piece on the -7A side of the cassette and there is no safety piece on the 8th side, the operating plate 54 moves in the N direction during recording and rotates the selection member 63 in the hour direction, as shown in Figure 2. moving the moving member 46 in the L direction against the tension spring 49;
hold it. Then, at the end of the tape on side A, the movable body 40 moves in the T direction as shown in FIG. and movable body 40
The part 40 (i) of the lock lever 42 comes into contact with the part 42a of the lock lever 42, and the lock lever 42 is rotated clockwise against the tension spring 44, whereby the lock lever 19 is rotated as shown in FIG. 11 of the conventional example. Part 19a and part 2 of operating member 22
20 is released, the operating member 22 moves in the E direction by the tension spring 25, and comes to a stopped state. Therefore, when the cassette No. 1-) has a human blood safety strip and there is no human blood safety strip on the 8th side, the position of the movable member 46 when recording is performed is as shown in FIGS. At the end of the tape on the surface, the operating member is released and comes to a halt.

As described above, according to this embodiment, the cam section 31 rotates in conjunction with the running of the magnetic tape, the movable body 40 that is normally spaced apart from the cam section 31, and the movable body 40 that contacts the cam section 31. The position of the moving member 46 is determined by the presence or absence of detection by the operating means (reel stand holding plate 36, operating lever 39, etc.), the moving member 46 movably holding the movable body 4°, and the detection member 59. The movable body 40 has a selection means (selection member 631 actuating plate 64, etc.) for positioning the movable body 40 to the L position.
When the movable body 4o comes into contact with the cam portion 31 by the operating means in the crab position, the operating force of the cam portion 31 moves the movable body 4o in the N direction, thereby actuating the forward/reverse switching member 66. Further, when the movable body is positioned at the L position by the selection means and comes into contact with the cam part 31 by the operating means, the movable body moves in the T direction by the operating force of the cam part 31, and the movable member 46 is moved so as to operate the lock lever 42. The moving direction of the movable body 40 can be selected depending on the position. No mechanism or parts are required, and the configuration of the device can be significantly simplified and downsized.

A second embodiment of the present invention will be described below.

In the first embodiment, the case of a micro cassette tape recorder has been described, but a compact cassette tape recorder can also be constructed in the same manner and the same effects can be obtained. In that case, the safety piece is on the side of the cassette half in the micro cassette, but the safety piece is on the back of the sumo wrestler's half in the compact cassette, so the detection member 69 is placed on the back of the cassette half and works with the detection member 69. Similar effects can be obtained by making the contact relationship with the plate 64 the same as in the first embodiment.

In the first embodiment, when there is a safety piece (not shown) on the human side of the cassette half and there is no safety piece 81 on the 8th side, the movable body 4 is removed at the end of the tape on side A when recording is performed.
0 to the opening 18 l\ of the operating member.

The lock was released and the recording member was in a stopped state, but the O,
and at the same time activate the forward/reverse switching means 65,
Playback of side 8 can also be started automatically at the end of the tape on side A.

Effects of the Invention As described above, the present invention provides a rotating body that rotates in association with the running of a magnetic tape, a movable body that is normally separated from the rotating body, and an operating means for bringing the movable body into contact with the rotating body. a selection means for positioning the movable member from the first position to the second position depending on the presence or absence of detection by the movable member movably holding the movable body and the detection member; When the movable body is brought into contact with the rotating body by the operating means at the position, the movable body moves in the first direction by the operating force of the rotating body,
When the first operated member is actuated and the movable body is positioned at the second position by the selection means and comes into contact with the rotating body by the operating means, the movable body moves in the second direction by the operating force of the rotating body. , the moving direction of the movable body is selected by the position of the movable member so as to operate the second operated member, so that the forward/reverse switching means and the automatic stop can be switched depending on the state of the movable member. By allowing the selection of the means to be carried out, it is possible to greatly simplify the configuration of the device without requiring a separate mechanism or member for selection, and to achieve miniaturization.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the main parts of a magnetic recording/reproducing apparatus according to the first embodiment of the present invention, FIG. 2 is a plan view of the main parts when the selection member 63 of FIG. 1 is activated, and FIG. FIG. 4 is a plan view of the main part showing when the operating member operates when the moving member 46 in FIG. 1 is in the L position, and FIG. 4 shows when the operating member is operating when the moving member 46 in FIG. Main part plan, 5th
The figure is a plan view of the main part showing the movement of the actuating plate 54 when the detection member 59 of FIG. 1 detects the B-side safety piece 81, and FIGS. head block 7o
FIG. 9 is a plan view of the main part of the tape end detection mechanism of a conventional micro-force cenote-precoder, and FIG. FIG. 11 is a plan view of the main part showing how the automatic stop at the end of the tape in FIG. 9 is performed. 31...Cam part, 36...3. Reel stand holding plate, 3
8... Supply reel stand, 39... Operation lever, 4
0...Movable body, 42.1.・Lock lever 146・・
...Moving member, 54... Operating member, 69 - Detection member, 63... Selection member, 65... Direct/reverse switching means, 81... B side safety piece. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 8
Figure 31 IJ7 匍6 Figure 9 1θ

Claims (3)

[Claims] (1) A rotary body that rotates in relation to the running of the magnetic tape, a movable body that is normally separated from the rotary body, an operating means for bringing the movable body into contact with the rotary body, and a movable body that is movable. It has a movable member held and a selection means for positioning the movable member from a first position to a second position depending on the presence or absence of detection by the detection member, and the movable body is rotated by the operating means in the first position. When it comes into contact with the body, the movable body moves in the first direction by the actuation force of the rotating body, actuating the first operated member, and the movable body is positioned at the second position by the selection means and moved by the operation means. When in contact with the rotating body, the movable body moves in the second direction by the operating force of the rotating body, and the direction of movement of the movable body is selected depending on the position of the moving member so as to actuate the second operated member. A magnetic recording/reproducing device characterized in that it is configured as follows. (2) The magnetic recording and reproducing apparatus according to claim 1, wherein the first operated member is a member for switching between forward and reverse directions. (3) The magnetic recording and reproducing apparatus according to claim 1, wherein the second operated member is a member for unlocking.