JPS6045929A - Tape recorder - Google Patents

Abstract

PURPOSE:To obtain a small-sized, thinned, light-weighted and power-saved tape recorder by providing the tape recorder with a control means for controlling the movement of an erase head constituted by a permanent magnet to the 1st position separated from a magnetic tape and the 2nd position contacted with the magnetic tape. CONSTITUTION:In the tape recorder, the movement of the erase head 26 is controlled by a recording/reproducing head 26, and in the stop status, the erase head 26 is held by a lock plate 28 and the held status of the erase head 26 is released by an erase solenoid 26 to be intermittently actuated. Therefore, the contacting and separating operation of the erase head 26 to/from the magnetic tape at the recording and reproducing time can be controlled by the erase solenoid 32, so that the control is simple. A small-sized solenoid having the small number of times of winding can be used in this case, so that the main body can be reduced at its size, thickness, weight and power consumption.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape recorder in which the erasing head is composed of a permanent magnet.

Conventional configurations and their problems In recent years, tape recorders have been required to be smaller, thinner, lighter, and more power efficient, and these have become the characteristics of the products.

The erase head of conventional tape recorders erases the magnetic tape by passing an erase current and generating a magnetic field, but this consumes a large amount of power, and the battery life is short, especially in battery-powered tape recorders. There was a problem in that it was not possible to record for long periods of time. In order to solve this problem, a tape recorder (di) in which the erasing head is made of a permanent magnet has been proposed in recent years. There must be. In particular, in order to improve operability and to enable remote control, etc., in tape recorders that can be operated with an electric switch, the erasing head is controlled by a solenoid or the like to a position away from the magnetic tape and a position in which it comes into contact with the magnetic tape. During recording, it has been common practice to continuously attract the solenoid to bring the erasing head into contact with the magnetic tape. However, this method has the disadvantage of not being able to save power, and small solenoids with a small amount of windings require a large current to obtain power. There have been problems such as adversely affecting the equipment, deteriorating the performance, and causing smoke and ignition if the heat generation becomes extremely large. In order to solve this problem, it is necessary to use a large solenoid with a large number of windings to generate less heat with a small current, but this does not allow for miniaturization.

It is not possible to make the product thinner and lighter.

In addition, in order to prevent further heat generation by using a small solenoid with a small amount of winding, a large current was passed through the solenoid at the beginning of suction, and after suction, the current was reduced to a small current for continuous suction, but this required two types of power sources. A power transformer or large capacity resistor and changeover switch means are required. As a result, cars have become more complex and expensive, and cars have become smaller and thinner.
There are other problems such as it is difficult to reduce the weight, and although the heat generation of the solenoid can be prevented, the transformer or resistor generates heat.Objective of the InventionThe present invention solves the above problems and is miniaturized. ,
It is an object of the present invention to provide a tape recorder that can be made thinner, lighter, and more power-saving, and can further improve reliability.

Structure of the Invention The present invention moves the recording/reproducing head to a first position where it is separated from the magnetic tape and a second position where it is in contact with the magnetic tape.
control means for controlling and controlling the erasing head composed of a permanent magnet to a first position spaced apart from the magnetic tape and a second position in contact with the magnetic tape; This is a cheap L/coder equipped with a holding means for holding the erase head in the first position and a release means for releasing the holding of the erase head by the holding means.
When the erasing head is moved from the first position to the second position, the erasing head is moved from the first position to the second position by operating the releasing means to release the erasing head from the holding position, and when the releasing means is deactivated, the erasing head is moved from the first position to the second position. The erasing head is held at the first position, and when the upper recording head and erasing head are moved from the second position to the first position, the erasing head is separated from the magnetic tape. In addition, by being configured to be held by the above-mentioned holding means, it is possible to reduce the size, thickness,
Weight reduction can further improve reliability.

Explanation of actual gun examples 1st. Fig. 2 shows the stopped state of a tape recorder in one practical example of the present invention, Fig. 1 shows the tape running device on the top of the board, and Fig. 2 shows the mode switching device on the bottom of the board. 19 In Figure 2, 1 is the substrate, 2
is a capstan which is rotatably provided on the bearing 3 of the substrate 1, and has a flywheel 4 concentrically and integrally formed therein. A driving pulley 6 is rotatably provided on the shaft 6 of the substrate 1, and concentrically and integrally constitutes a driving gear γ.

The clockwise rotation of the motor 9 is transmitted to the flywheel 4 and the drive pulley 6 via the belt 8.
The capstan 2 is rotated clockwise, and the drive pulley 6 and drive gear 7 are rotated counterclockwise.

Reference numeral 1o denotes a first reel stand, which is rotatably mounted on a shaft 11 and rotated clockwise by a reel motor (not shown). Reference numeral 12 denotes a second reel stand, which is rotatably mounted on a shaft 13 and driven counterclockwise by a reel motor (not shown). These constructions use well-known methods and will not be described in detail.

Reference numeral 14 denotes a head substrate, which is freely drivable on shafts 16 and 16, on which a recording/reproducing head 17 is mounted.

Reference numeral 18 denotes a control plate which is connected to the shaft 15.1 in the same way as the head board 14 above.
6, and is sandwiched between the substrate 1 and the head substrate 14.

Reference numeral 19 denotes an operating lever, which is rotatably provided on a shaft 2o, and a control shaft 21 at one end 19a is engaged with the control plate 18. A spring 22 is attached to this control shaft 21 and the head substrate 14.
is applied to urge the stepped portion 14a of the head substrate 14 to come into contact with the control shaft 21.

Reference numeral 23 denotes an erasing head substrate, which is slidably provided on a shaft 24.25, on which an erasing head 26 made of a permanent magnet is placed, and is biased in the direction of the arrow by a spring 27. The first bent portion 18alCd of the control plate 18 is in contact with the first bent portion 18alCd.

28 is a lock plate rotatably provided on the shaft 29 with a spring 30
It is urged clockwise, and its rotation due to the urging is regulated by a regulating shaft 31. This lock plate 28
The end portion 28a is brought into contact with the end portion 23b of the erase head substrate 23 to prevent the erase head substrate 23 from moving in the direction indicated by the arrow.

Reference numeral 32 denotes an erase solenoid connected to a relay plate 34 rotatably provided on the shaft 33 of the lock plate 28.

A pinch roller 35 is rotatably provided on a shaft 38 of a pinch roller lever 37 rotatably provided on a shaft 36, and is configured to abut against the capstan 2.

39 is a pinch roller spring, which is attached to the pinch roller lever 3 above.
7, one end 39a is engaged with the second bent portion 18b of the control plate 18, and the pinch roller lever 3
It is in contact with the bent portion 37g of No.7.

Reference numeral 40 denotes a cam pulley, which includes a gear portion 41 that meshes with the driving gear 7, and a first shaft 42 that controls the shaft 42 of the other end 19b of the operating lever 19. It has a second cam 43, 44 and is rotatably mounted on the shaft 46.

This gear part 41 has a first gear. Second toothless portion 41a.

41b is formed, and the first cam 43 has a positioning portion 43.
A is formed on the second cam 44, and a positioning portion 44a is formed on the second cam 44.

A lock lever 46 is rotatably provided on a shaft 47 and biased clockwise by a spring 48.

A solenoid plate 60 is rotatably provided on the shaft 49 of one end 46a of the lock lever 46, and the lock convex portion 46c of the other end 46b is located at the first end of the cam pulley 4°. The second locking portions 40a, 40b (shown in FIG. 6) are locked.

Reference numeral 61 denotes a play solenoid having an iron core 62 to which the solenoid plate 6o is attracted.

A shaft 63 is inserted into the hole 50a at one end of the solenoid plate 60 with a gap therebetween to regulate the rotation of the solenoid plate 5°.

One end 48a of the spring 48 is connected to the first end 48a of the Cam Goo+740. The first spring of the gear part 41 is in contact with the second spring receiving parts 4oa and 4od+. When the second toothless portions 411.41b are respectively located on the drive gear 7, the cam pulley 4o
It is designed to be biased clockwise.

64 is a detection switch which is connected to the other end 19b of the operating lever 19.
It is actuated by the bending portion 19c, and the operating state is detected.

A tape cassette 66 has a magnetic tape 66, first and second tape parallels 57 and 58 (shown in FIG. 3), and a reel hub (not shown).

The upper recording/reproducing head 17 and the erasing head 26 are connected to this first. It is opposed to the second tape butt 57, 58 and is in contact with the magnetic tape 66.

The operation of the actual chip recorder configured as described above will be described below. First, the recording operation will be explained.

1st. From the stopped state shown in FIG. 2, the plain lens 61
When the solenoid plate 60 is continuously operated, the solenoid plate 60 is continuously attracted to the iron core 62 as shown in FIG. 4, and the lock lever 46 is rotated counterclockwise against the spring 48 to be in the state shown in FIG. .

When the lock lever 46 is set in this manner, the lock convex portion 46c on the other end 46b is connected to the first locking portion 4 of the force pulley 4°.
0a is released, and the cam pulley 40 is rotated clockwise by the one end 48a of the spring 48 from the state where the first toothless portion 41a is located on the drive gear 7, and the gear portion 41 is driven. The gear 7 is engaged with the gear 7 and rotated clockwise until the second toothless portion 41b is located on the drive gear 7.

When the cam pulley 40 is rotated in this manner, the second locking portion 40b engages with the lock convex portion 46C of the lock lever 46.
At the same time, one end 48a of the spring 48 is brought into contact with the second spring receiving portion 4od, and the cam pulley 40 is biased clockwise, thus being held in the state shown in FIG.

When the cam pulley 4o is set in this way, the operating lever 1
9, the shaft 42 at the other end 19b is the first. Second cam 43.44
The shaft 42 is rotated clockwise under the control shown in FIG.

When the actuating lever 19 is in this manner, the control plate 18.
Head board 14. The erasing head substrate 23 is slid in the direction indicated by the arrow, but the head substrate 14 is blocked by the shafts 16 and 16, so as shown in FIG. 17 is magnetic tape 66
is held in deep contact with the Since the erase head substrate 23 is blocked by the shafts 24 and 26, it is urged in the direction of the arrow by the spring 27 as shown in FIG. 3, and the erase head 26 is held in contact with the magnetic tape 66. .

When the control plate 18 is slid in the direction of the arrow, the pinch roller lever 37 is rotated counterclockwise via the spring 39'f, and the pinch row 236 is moved by the spring 39 as shown in FIG. The magnetic tape 66 is pressed against the capstan 2 and runs at a constant speed in the direction of arrow B. At the same time, the first reel stand 10 is rotated counterclockwise by a reel motor (not shown), and the magnetic chive 66 fed by the capstan 2 and pinch roller 36 is wound around a reel hub (not shown). The device is now in recording mode.

At this time, even if the operation of the erasing solenoid 32 is released, the damping plate 28 is brought into contact with the erasing head substrate 23, so there is no problem with the operation.

Next, the stopping operation from the recording state will be explained.

Third. From the recording state shown in Figure 4, the above grain lenoid 61
When this operation is released, the lock lever 46 is rotated clockwise by the spring 48, and the locking of the second locking portion 40b of the cam pulley 40 by the lock protrusion 46c is released. Therefore, the cam pulley 40 is rotated clockwise by the one end 48a of the spring 48 from the state where the second toothless portion 41b is located on the drive gear 7, and the gear portion 41
is engaged with the drive gear 7 and rotated in the "clock" direction until the first toothless portion 41a is positioned on the drive gear 7.

When the cam pulley 4o is rotated in this manner, the operating lever 19 is rotated so that the shaft 42 at the other end 19b moves from the 1st degree to the second cam 4.
3.44, and the state shown in FIG. 4 changes to the state shown in FIG. At the same time, the control board 18 and the head board 14. The erasing head substrate 23 is also changed from the state shown in FIG. 3 to the state shown in FIG.

When the cam pulley 40 is rotated in this manner, the first locking portion 40a is locked to the lock convex portion 46c of the lock lever 46, and the cam pulley 4o is held in the state shown in FIG. 2 and comes to a stopped state. .

Next, the playback operation will be explained. 1st. When the gray solenoid 61 is continuously operated from the stopped state shown in FIG. 2, the control plate 18° head substrate 14 slides as in the recording operation, and the upper recording/reproducing head 17 moves onto the magnetic tape 6 as shown in FIG.
6, the n1 pinch roller 36 is in deep contact with the capstan 2
It is pressed into contact with and enters the regeneration state.

At this time, since the erase solenoid 32 is not operated, the erase head substrate 23 is blocked by the lock plate 28, and the erase head 26, which is a permanent magnet, is separated from the magnetic tape 66 and no erase operation is performed.

When the operation of the play solenoid 61 is released from this playback state, it is brought to a stop state, which is the same as the stop operation from the record state.

Also - the play solenoid 61 and the erase solenoid 32
etc. are controlled by electric control means, but since these are well known, they will not be described in detail here.

As described above, according to this example, the movement of the erasing head 26 is controlled by the control plate 18 that controls the recording/reproducing head 17, and the erasing head 26 is held by the lock plate 28 in the stopped state. Since the release of the holding state is performed by the erasing solenoid 32 which operates intermittently, the erasing head 26 can be brought into contact with and separated from the magnetic tape 66 during recording and playback by controlling the erasing solenoid 32, which is easy to control. It is. Moreover, this erasing solenoid 32 is small and can be used with a small amount of windings, so it is inexpensive and the main body of the chip recorder can be made smaller and thinner.

It is lightweight, consumes less power, generates less heat, and is safe.

Effects of the Invention The present invention controls the movement of a recording/reproducing head to a first position away from the magnetic tape and a second position in contact with the magnetic tape, and moves an erasing head composed of a permanent magnet away from the magnetic tape. a control means for controlling the movement between a first position separated from the magnetic tape and a second position brought into contact with the magnetic tape; a holding means for holding the erasing head at the first position; and a holding means for holding the erasing head by the holding means. A release means for releasing the erase head is provided, and when the upper recording/reproducing head is moved from the first position to the second position, the release means is operated to release the holding of the erase head, and the erase head is moved from the first position to the second position. 2, and when the release means deactivates the erase head, the erase head is held at the first position, and the upper recording head and erase head are moved from the second position to the first position. Since the erase head is separated from the magnetic tape and held by the holding means when the magnetic tape is moved, it is possible to reduce the size, thickness, weight, and power consumption, and further improve reliability. This makes it possible to realize an excellent tape recorder that can achieve the following effects.

[Brief explanation of drawings]

FIG. 1 shows a tape recorder in a stopped state according to an embodiment of the present invention, and FIG. 2 is a plan view showing a tape running device on the top of the board, FIG. 2 is a plan view showing a mode switching device on the bottom of the board in a stopped state, and FIG. Figure 4 is a plan view showing the recording state;
FIG. 6 is a plan view showing the regenerated state, and FIG. 6 is a back view showing the state of the cam pulley. 2°... Cab stan, 7... Drive gear, 9.
...Motor, 14...Head board, 17...
...Recording/playback head, 18... Control board, 19.
...Operating lever, 23... Erasing head board, 26... Erasing head, 28... Lock plate, 32... Erasing solenoid, 36... ...
...Pinch roller, 4o river...Cam pulley, 43...
...First cam, 44 ...Second cam, 4
6... Lock lever 161... Play solenoid, 66... Tape cutter, 66...
·····Magnetic tape. Name of agent Patent attorney Toshio Nakao TL or one person Figure 3 32 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A recording/reproducing head is controlled to be moved to a first position where it is spaced from the magnetic tape and a second position where it is in contact with the magnetic tape, and an erasing head composed of a permanent magnet is moved to a first position where it is spaced apart from the magnetic tape. position and the second one in contact with the magnetic tape.
control means for controlling the movement of the erasing head to the first position; holding means for holding the erasing head at the first position; and release means for releasing the erasing head from being held by the holding means; When the erasing head is moved from the first position to the second position, the erasing head is moved from the first position to the second position by operating the releasing means to release the erasing head from holding the erasing head, and when the releasing means is inactivated, the erasing head is moved from the first position to the second position. The erasing head is held at the first position, and when the upper recording head and erasing head are moved from the second position to the first position, the erasing head is separated from the magnetic tape. A tape recorder characterized in that it is configured to be held together with the holding means.