JPS60121562A - Tape recorder - Google Patents

Abstract

PURPOSE:To move a head substrate without restriction by a cam and to prevent wow and flutter generation due to deformation of a pinch rolled by connecting the cam and the head substrate through a coupling plate, and by making it possible to release the connecting part between the head substrate and the coupling plate. CONSTITUTION:An engaging pin 27 of a slide layer 26 is brought into slide contact with a guide wall 31 which is formed at a substrate 1, and by the energized force of a spring 30, the pin is in contact with the circumference face of a cam member 20. An engaging pin 32, which is studded at the tip part along the guide wall 31 of the slide lever 26, is connected with an engaging part 5a of a head substrate 5. When troubles such as power failure occur, and the mechanism abnormally stops in the condition that the head substrate 5 is at the advancing position, and in the play condition which is in the play mode or the record condition, the head substrate 5 is retreated and the cassette can be removed by rotating the slide lever 26 in the C direction and by releasing the engagement between the engaging pin 32 and the engaging part 5a.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to improvements in tape recorders.

(Technology) Conventionally, by rotating a cam with a motor,
There is a tape recorder in which a head substrate on which a magnetic head is mounted is moved from a stop position to a recording/reproducing position and then returned to the stop position. This conventional tape recorder has a lighter operating feel compared to those that require force to move the head board when the operation button is pressed.
Furthermore, it has many advantages, such as reduced power consumption, compared to a structure in which the head substrate is moved by a plunger.

(Problem to be Solved by the Invention) By the way, when recording and playing back data with a tape recorder, a rubber tire with a rubber tire is brought into pressure contact with a rotating shaft called a capstan, and a tape is sandwiched between them so that the tape runs at a constant speed. It is normal to do so.

However, when the above-mentioned type of tape recorder is in this recording/playback state, troubles such as an emergency stoppage of the power supply such as a power outage may occur, which may cause the following problems. This is causing problems. That is,
For example, if there is no power supply, the motor will not move even if the stop button is operated, so the head board cannot be returned to the stop position, and the pinch roller will remain in pressure contact with the capstan until power is supplied. This causes deformation of the pinch roller and causes wow and flutter.

Therefore, the technical object of the present invention is to solve this problem and to make it possible to return the head substrate to the stop position without rotating the cam.

(Means for Solving the Problems) In order to solve the above technical problems, the present invention connects a cam and a head substrate via a connecting plate.

The head board is driven by the cam via the connecting plate, and the i! l! The gist is that the connection can be released.

(Function) Since the tape recorder of the present invention has such a configuration, the head substrate can be freed from the cam by manually releasing the connecting portion between the head substrate and the connecting plate. This means that the head substrate can be moved regardless of the

(Example) An example in which the present invention is applied to a feather touch type tape recorder will be described below based on the drawings.

In FIG. 1, l is the board of the tape recorder,
A guide hole 2 is provided in the center of this substrate l. A reel stand 3.4 is arranged with this guide hole 2 as a boundary.

'Here, in FIG. 1, the reel stand 3 on the left side is the reel stand on the unwinding side, and the reel stand 4 on the right side is the reel stand on the winding side. A head substrate 5 that supports a magnetic head (not shown) is slidably provided on the substrate l. Reference numerals 6 and 7 designate guide holes that fit into engagement pins 8 and 9 protruding from the head substrate 5 to slidably guide the head substrate 5. The head substrate 5 is urged backward by a spring 10, and is in the forward position in the state shown in FIG. 11 is the brake lever
112 is a cam lever, and the brake lever I+ has a wing part 11a and a wing part 11b, and this χ part 11a
Each end of the wing portion 11b is raised, and a rubber member 13.13 is attached to each end. Each wing 11
Guide pins 14.15 are installed in a and Ilb, respectively, and these guide pins 14.15 are fitted into guide holes 16.17 drilled in the board l, and the brake lever 11 is inserted into the guide holes. 18. It is slidable along the extending direction of 17. The brake lever 11 has a bent part 1 in the center.
1c is formed, to which the free end of the leaf spring 18 fixed to the substrate l is abutted, and the brake lever 1
1 is biased in the direction in which its rubber member 13.13 comes into contact with the reel stand 3.4.

Camure/<-12 is provided on the back side of the board l,
It is allowed to swing around the fixed shaft 19 as a fulcrum. An engaging portion 12a is provided at the free end of the cam lever 12, and this engaging portion 12a abuts against the cam member 20.

The cam member 20 is generally composed of a first cam 21, a second cam 22, and a gear portion 23, as shown in FIGS. 2 to 4. Engagement part 12a of brake lever 12
is in contact with the circumferential surface of the second cam portion 22, as shown in FIG. The cam member 20 is configured to rotate around a shaft 24 fixed to the substrate l, and a worm 25 is engaged with the gear portion 23. This worm 25 is rotationally driven by a motor (not shown), and this motor (not shown) is driven by a mode setting signal that sets the mode of the tape recorder such as stop, cue, play, recording, fast forward, rewind, etc. It is designed to be rotationally driven. The cam member 20 is configured to stop rotating in each mode, and has an integral position detection device (not shown), and a detection signal from the position detection device rotates a motor that drives a drive pulley, which will be described later. It looks like this. A circular protrusion 12b is formed approximately at the center of the cam lever 12, and this circular protrusion 12b is in contact with the bent portion 11c of the brake lever 11, and the brake lever A-11 is slidably controlled by the cam lever 12. There is.

Reference numeral 26 denotes a slide lever, which has a T-shape, and has an engagement pin 27 planted at one end thereof.

The other end has an upright portion 211iA. 28 is a stroke lever. Stroufle/<-28 is able to swing around the fixed shaft 23, and slide lever 2B
A spring 30 is suspended between the swing lever 28 and the swing lever 28. Slide/<-28.

The stroke lever 28 is biased by the spring 30 in the direction of arrow B in FIG. 1, and the stroke lever 28 is biased by the spring 30 in the direction of arrow B in FIG. The engagement pin 27 of the slide lever 26 is brought into sliding contact with a guide wall 31 formed on the substrate l, and is also brought into contact with a corner surface of the first cam portion 21 of the cam member 20 by the biasing force of the spring 30. ing.

The slide lever 2B reciprocates along the guide wall 31 in the direction in which the guide wall 31 extends, and an engagement pin 32 is installed at the tip of the reciprocating movement.
is engaged with the retaining portion 5a of the head substrate 5. The mode of the head substrate 5 is determined by the slide lever 26.

33 is an intermediate lever. This intermediate lever is for controlling the stroke lever 28, and has a bent portion 34 formed at one end thereof. This bent portion 34 has
As shown in Figure 6.

A locking hole 35 is formed, and the cam lever 1 is inserted into this locking hole 35.
The intermediate lever 33 is connected to the cam lever 12 by inserting the second locking portion 3θ. A locking hole 37 is formed at the other end of the intermediate insert 8-33, into which a pin 38 mounted on the stroke lever 28 is fitted. Note that the substrate l has a rectangular hole 3 that allows the intermediate lever 33 to reciprocate.
8 is formed. An engagement pin 40 is installed at the other end of the stroke lever 28 . This binding bottle 40
is fitted into the engagement hole 42 of the switching lever 41.

This switching lever 41 is installed between the reel stand 3 and the reel stand 4, and has a symmetrical shape. This switching lever 41 is supported by a support block 43 provided on the back side of the board l. The reciprocating movement of the switching lever 41 in the direction in which the guide hole 2 extends is controlled by the stroke lever 2B.

The reel stands 3, 4 have a reel shaft 44, as shown in FIG. 7, and this reel shaft 44 is press-fitted and fixed to the support block 43. The main part of the reel stand is upwardly biased by the leaf spring 45 and the spring 4B, and the main part of the reel stand is generally composed of a first gear part 47 and a second gear part 48 as rotating wheels. A felt 48 is interposed between the portion 47 and the second gear portion 48 . here,
The felt 48 has a radical 8 in the second gear part 48, and the upper surface of the first gear part 47 is roughened to improve frictional force.

A swing lever shaft 50 is provided protruding from the lower part of the support block 43, as shown in FIG. This swing lever shaft 50
A drive pulley 51 is rotatably provided. In FIG. 1, reference numeral 52 denotes a motor pulley, and here, the rotation center axis 52 of this motor pulley 52 is a gear stan axis. Motor pulley 52 and drive pulley 51
A belt 53 is passed between the two. A swing member 54 is swingably provided on the swing lever shaft 50 . A shaft 55 is inserted into the free end of the swinging member 54, and a driven gear 56 as a high-speed drive wheel is press-fitted into the upper end of the shaft 55, and the 1wj moving member 54 and the driven gear 56 are connected to each other. A swinging member 57 is swingably provided between them. An idler shaft 58 is protruded from the swinging member 57, and a hydraulic gear 59 as a constant speed drive wheel is rotatably attached to the idler shaft 58, and is urged toward the swinging member 57 by a spring (not shown). ing. Swing member 57
As shown in FIG. 9, an engagement notch Bo is formed in the base of the swing member 54, and an engagement protrusion 61 is formed in the swinging member 54.
When the swinging member 54 and the swinging member 57 are combined and inserted into the guide hole 2 of the board 1, the insertion can be easily performed. Engaging protrusion 61 and notch 6
A gap 82, 82 is provided between the swinging member 54 and the surrounding wall 0 so that the swinging member 54 and the swinging member 57 can swing relative to each other. A reduction gear 64 is integrally formed at the lower part of the driven gear 56, and the reduction gear 64 is always meshed with the idler gear 58. A driven pulley 85 is press-fitted into the lower end of the shaft 55, and the drive pulley 51 and the driven pulley 85
A belt 86 is passed between the belt 53, the drive pulley 51 . The signal is transmitted to the shaft 55 via the belt 6B and the driven pulley 85.

The switching lever 41 has an idler gear 58 and a driven gear 5.
It has a function as a swing regulating means for regulating the swing with respect to the swing member 54, 57, and the swing member 5
It has a regulating surface that comes into contact with 4.57 to regulate the swinging. In FIG. 1, 67 is a swing regulating surface of the swing member 54;
88 is a swing regulating surface of the swing member 57; 88 is a swing member 54;
, 57. FIG. 1 shows a state in which the swing regulating surface B8 is in contact with the swinging member 54 and the swinging of the swinging member 54 is restricted.

Next, the action will be explained.

When the mode setting signal is input to the motor, the cam member 20
is rotated, and the cam member 20 is stopped in the mode set by the mode setting signal. The rotation of the cam member 20 causes the cam lever 12 to swing, causing the brake lever 11 and the intermediate lever 33 to slide. The stroke lever 28 swings as the intermediate lever 33 slides, and the switching lever 41 swings as the stroke lever −28 swings.
slides, and the swinging states of the swinging members 54 and 57 are switched. Further, as the cam member 20 rotates, the head substrate 5 slides, and the head substrate 5 stops in the set mode. At this time, the cam member 20 stops rotating, and a motor (not shown) is driven to drive the drive pulley 52.
is driven, and the driven gear 58 is rotated. The rotation of the driven gear 56 is transmitted to the idler gear 58 via the reduction gear 64, and the idler gear 5θ is connected to the reduction gear 64.
It revolves around the swinging member 57 while meshing with it due to friction with the swinging member 57, and meshes with the gear 47 of one of the reel stands 3.4. As a result, the rotation of the idler gear 58 is transmitted to either one of the reel stands 3 and 4. In FIG. 1, since the idler gear 59 is swingable, recording or reproduction is performed.

The gear 47 of which reel stand 3 or 4 the idler gear 59 meshes with is determined by the rotational direction of the motor.

By the way, in this state, that is, in the play or record state where the head board 5 is in the forward position and in the play mode, if a trouble such as a power outage occurs and the mechanism stops abnormally.

In FIG. 1, by rotating the slide lever 28 in the direction of arrow C to disengage the engagement pin 32 and the engagement portion 52, the head board 5 can be moved backward and the cassette can be removed. . In other words, since the pressure contact between the capstan and the pinch roller is also released, the pinch roller is not deformed due to the continuation of the pressure contact when both are stopped, and the wow flapper caused by this deformation is prevented. This can be prevented from occurring. The slide lever 26 can be easily rotated in the direction of arrow C by pushing its upright portion 28A to the right in the figure, but it is of course possible to rotate the slide lever 26 by holding other parts. It is. Note that the engagement pin 32 and the engagement portion 52
The engagement can be performed by moving the head substrate 5 forward.

On the other hand, when the swinging member 54 is allowed to swing, the driven gear 58 swings and meshes with one of the gears 48 of the reel stand 3.4, causing the reel stand 3.4 to rotate at high speed. As a result, each operation of fast forwarding, winding, cueing, and reviewing is performed.

Although the embodiments have been described above, the present invention is not limited thereto and includes the following.

(1) The tape recorder reel stand drive device according to the present invention can also be applied to an auto-reverse type.

(2) The shapes of the reel stands 3.4 do not necessarily have to be the same shape.

(Effects of the Invention) As explained above, according to the present invention, it is possible to move the head board without being restrained by the cam, so even if a trouble such as a power outage occurs during recording/playback operation and an abnormal stop occurs. Also, it is possible to release the pressed state between the capstan and the pinch roller, and it is possible to prevent wow flapper from occurring due to deformation of the pinch roller.

[Brief explanation of the drawing]

Fig. 1 is a plan view of essential parts of a tape recorder according to the present invention, Fig. 2 is a sectional view of a cam member that constitutes a part of the reel stand driving mechanism of the tape recorder according to the present invention, and Fig. 3 is a t52 view. FIG. 4 is a plan view in the direction of arrow X, and FIG. 4 is a sectional view taken along the line Y-Y in FIG. FIG. 5 is a partial cross-sectional view showing the mounting state of the cam member shown in FIGS. 2 to 4, and FIG. 6 shows a cam lever constituting a part of the reel stand driving mechanism of the tape recorder according to the present invention. FIG. 7 is a vertical sectional view to explain the structure of the reel stand; FIG. 8 is a sectional view taken along line 2-2 in FIG. 1; The figure is a plan view of a main part for explaining the fitting relationship of the swinging member. 5...Head board 5a...Engaging portion 20...Cam 26...Slide rail (connection plate) 32...
Engaging pin patent applicant Sankyo Seiki Seisakusho Co., Ltd. Agent Patent attorney Yumi Kaede (and one other person) 4th drawing 9 Fig. 5 4 Fig. 6 1 Fig. 7 Fig. 8 W 4 ( Fig. 9

Claims (1)

[Claims] (1) By rotating the cam with a motor,
In a tape recorder in which a head substrate carrying a magnetic head is moved from a stop position to a recording/playback position and returned to the stop position, the cam and the head substrate are connected via a connecting plate. death,
A tape recorder characterized in that the head substrate is driven by the cam via the connecting plate, and the connecting portion between the connecting plate and the head substrate can be released.