JP2879193B2 - Mode switching device for 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, for example, a playback mode switching device for a tape recorder having an auto-reverse mechanism.

[0002]

2. Description of the Related Art In a tape recorder provided with an auto-reverse mechanism, when the rotation of a reel receiver is stopped at the end of a tape, or when a program switch (playback mode changeover switch) is operated, a tape running mode is set to a forward mode. And a reverse mode. When the running mode is switched, the running direction of the tape and the state of the reproducing head are switched to a state corresponding to the mode.

Examples of this type of mode switching mechanism include those disclosed in Japanese Patent Application Laid-Open No. 1-154531 (mode selection reversing mechanism) and Japanese Patent Publication No. 63-14416 (magnetic tape device). In the mode switching device, by operating the operating member, the pressing member rotatably connected to the operating member is brought into contact with one end side of the reversing member to rotate the reversing member in reverse. Thus, the mode switching plate connected to the other end of the reversing member is moved, and the running mode of the tape is switched between the forward mode and the reverse mode. Generally, the pressing member is configured to abut on the reversing member in a fixed posture, and the pressing member is urged by a spring or the like with respect to the operation member and is normally positioned at the neutral position.

[0004]

By the way, tape recorders, particularly portable tape recorders, are becoming smaller, lighter and thinner, and are slightly larger than tape cassettes. Accordingly, various contrivances have been made for miniaturization, thinning, and layout of all components, and a mode switching device is also an object of this.

However, the mode selection inversion mechanism disclosed in Japanese Patent Application Laid-Open No. 1-154531 and Japanese Patent Publication No.
In the magnetic tape device disclosed in Japanese Patent No. 14416, the spring for urging the pressing member against the operating member is disposed so as to extend in the moving direction of the operating member.
There is a problem that the operation member itself becomes large. The present invention has been made in consideration of the above-described circumstances, and has as its object to reduce the size and thickness of a tape recorder by simplifying the structure and reducing the size of the operation lever member in the moving direction. It is an object of the present invention to provide a tape recorder mode switching device which can be achieved.

[0006]

SUMMARY OF THE INVENTION The present invention in order to achieve the above object, provided reciprocally relative to the chassis of a tape recorder, the tape running mode of the forward mode when in a first movement position, When the tape is in the second movement position, the tape traveling mode is set to the reverse mode .
That the switching member and, a <br/> operating lever member that is movably supported on said chassis, rotatably supported on said operating lever member
Extending from the pivot point toward the switching member.
Pressing member, the operating lever member and the pressing member
Between the operating lever member and the pressing portion
A centering spring for elastically holding the material in a neutral position;
The chassis between a switching member and the pressing member
Rotatably supported at one end facing the pressing member.
Has a pair of pressed parts symmetrically and the other end is
; And a reversing member connected to a member, the operating lever unit
Each time a material is operated toward the switching member,
A pressure member alternately presses the pair of pressed portions to switch the pressure.
Tape recorder that alternately moves the
In the mode switching device, the pressing member is provided at a rotation fulcrum.
First and second spring receiving portions on both sides;
The member includes first and second spring hook portions on both sides of the pressing member.
The centering spring has a central portion of a pressing member.
One end side of the first spring receiving portion and the
A second spring receiving portion, the other end of the second spring receiving portion;
And a torsion coil spring locked on the second spring hook portion.
Is done .

[0007]

According to the mode switching device for a tape recorder of the present invention, when the operation lever member is operated, the push button is pressed.
The pressing member presses the pressed portion to one side, and rotates the reversing member to one side.
Move. And the pressing member moves the switching member forward.
You.

When the operation lever member returns to the initial position,
The pressing member returns to the neutral position by the centering spring
I do. Then, when the operation lever member is operated again,
The pressure member presses the other pressed part and moves the switching member back.
Let it .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows a mode switching device 1 inside a tape recorder provided with an auto-reverse mechanism. The mode switching device 1 switches a running mode of a tape recorder between a forward mode and a reverse mode.

In FIG. 1, a mode switching device 1 has an operation lever member 2.
Is rotatably supported at one end by a chassis 4 of the tape recorder. The other end of the operation lever member 2 extends in the lateral direction and forms a lever portion 3. A coil portion of a coil spring 8 is mounted on the rotation shaft 6 of the operation lever member 2, and the coil spring 8 is formed on the first latch portion 10 formed on the sub-chassis 4 and on the operation lever member 2. Each of the second hooks 12 is hung. Therefore, the operation lever member 2 is normally urged by the spring force of the coil spring 8 so that the side portion thereof is in contact with the stopper portion 14 formed on the chassis 4. When a downward force in FIG. 1 is applied to the lever 3 at the other end, the operation lever member 2 is rotated clockwise about the rotation shaft 6.

[0011] Lever portion 3 of the operating lever member 2 is not shown, for example, a tape recorder programmable switch, i.e., is connected to the playback mode switch
You. Each time the reproduction mode changeover switch is operated, the lever portion 3 is pushed down, and the operation lever member 2 is rotated one reciprocation.

A pressing member 1 is provided at the center of the operating lever member 2.
6 is rotatably supported. The pressing member 16 has a distal end extending in the moving direction of the operation lever member 2, and the distal end serves as a pressing portion 20. Note that a pin extending toward the back side of the paper surface in FIG. 1 is formed in the pressing portion 20. The operation lever member 2 has first and second spring hooks 26a and 26b formed on both sides of the rotation shaft 18, respectively. The pressing member 16 includes the rotating shaft 1.
8, the first and second spring receiving portions 22
a and 22b are respectively formed. First spring hook 2
4a, first spring receiving portion 22a and second spring hooking portion 24
b and the second spring receiving portion 22b are arranged side by side.
The coil portion of the torsion coil spring 26 is mounted on the rotating shaft 18, and the first arm 1 of the torsion coil spring 26
6a is a first spring hooking portion 24a and a first spring receiving portion 22
The second arm portion 26b is bridged over the second spring hook portion 24b and the second spring receiving portion 22b.

From another viewpoint, the first arm portion 26a of the torsion coil spring 26 presses the first spring receiving portion 22a and the first spring hooking portion 24a in contact with each other from the same direction. The second arm 26b of the torsion coil spring 26
The second spring receiving portion 22b and the second spring hooking portion 24b are pressed in contact with each other from the same direction. Pressing member 16
Is rotated clockwise with respect to the operation lever member 2, the first spring receiving portion 22a of the pressing member pushes up the first arm portion 26a of the torsion coil spring 26, and the first arm portion 26a Move away from the part 24a. The first arm portion 26a of the torsion coil spring 26 acts to press the first spring receiving portion 22a and the first spring hooking portion 24a in the same direction. The force to return to the neutral position acts.

On the other hand, when the pressing member 16 is rotated counterclockwise with respect to the operation lever member 2, the second spring receiving portion 22 b of the pressing member becomes the second arm portion 26 b of the torsion coil spring 26.
, And the second arm portion 26b is separated from the second spring hook portion 24b. Then, the second arm portion 26 of the torsion coil spring 26
b acts to push the second spring receiving portion 22b and the second spring hooking portion 24b in the same direction, so that the pressing member 16 includes the operating lever member in the same manner as when it is rotated clockwise. The force for returning to the neutral position for 2 acts.

Therefore, when a force is applied to the pressing portion 20 of the pressing member 16 and the pressing member 16 is rotated with respect to the operation lever member 2 and then the force applied to the pressing portion 20 is released, the pressing is performed. The member 16 is at a neutral position with respect to the operation lever member 2. In this embodiment, the centering mechanism for positioning the pressing member 16 at the neutral position with respect to the operation lever member 2 forms the first and second spring hook portions 24a and 24b on the operation lever member 2 and the first member on the pressing member 16.
And the second arms 26a, 26b of the torsion coil spring 26 are respectively formed between the spring hooks 24a, 24b and the respective spring receivers 22a, 22b.
This is a simple structure in which only "b" is bridged. Therefore, not only can the pressing member 16 be easily assembled to the operation lever member 2, but also the positioning of the pressing member 16 with respect to the operation lever member 2 can be performed with a simple structure. Further, both arm portions 26a of the torsion coil spring 26,
Since 26b extends on both sides of the rotation shaft 18 of the pressing member with respect to the operation lever member 2, the size of the operation lever member 2 in the movement direction can be reduced without the operation lever member 2 extending long in the movement direction. As a result, the mode switching device itself can be reduced in size, and the tape recorder can be reduced in size and thickness.

The pressing member 16 is swung downward together with the operation lever member 2, and the reversing member 2 is placed on the chassis 4 in the moving direction of the pressing member 16.
7 is rotatably supported. At one end of the reversing member 27, a pair of branching engagement portions 30 (a pair of pressed portions) that allow the pressing portion 20 of the pressing member 16 to contact is formed.
The branch engagement portion 30 includes first and second bifurcated portions.
It has engaging portions 30a and 30b.

The switching member 3 is provided at the other end 32 of the reversing member 27.
4 are connected at one end. When the reversing member 27 is rotated, the switching member 34 can move left and right in FIG. The movement of the switching member 34 is linked to the reproduction mode switching mechanism 36, and the switching member 34
When in the moving position, the playback mode switching mechanism 36 switches the running mode of the tape to the forward mode. When the switching member 34 is in the second moving position on the right, the playback mode switching mechanism 36 switches the running mode of the tape. Switch to reverse mode.

Therefore, the reversing member 27 is connected to the switching member 3.
4 and two rotation positions corresponding to the first and second movement positions. That is, the first turning position of the reversing member 27 corresponding to the first moving position of the switching member 34 is a state in which the reversing member 27 is turned clockwise as shown in FIG. The second rotation position of the reversing member 27 corresponding to the second movement position of the member 34 is a state where the reversing member 27 is rotated counterclockwise.

When the reversing member 27 is in the first rotation position when viewed in the moving direction of the operation lever member 2, the pressing portion 20 of the pressing member 16 is at a position facing the first engagement portion 30a,
When the reversing member 27 is at the second rotation position, the pressing portion 20 of the pressing member 16 is at a position facing the second engaging portion 30b. Then, together with the operation lever member, the pressing member 16
When the pressing portion 20 is lowered while being engaged with the first engagement portion 30a, the reversing member 27 is rotated counterclockwise,
It is located at the second rotation position. When the pressing portion 20 is swung down in a state where the pressing portion 20 is engaged with the second engagement portion 30b, the reversing member 27 is rotated clockwise, and is positioned at the first rotation position.

Next, the operation will be described with reference to FIGS. When the mode changeover switch of the tape recorder is operated, the operation lever member 2 is rotated in conjunction therewith,
The pressing member 16 is swung downward. And
The pressing portion 20 of the pressing member 16 is engaged with the first engaging portion 30a of the branch engaging portion 30 of the reversing member 27, and the pressing portion 20 slides on the inclined surface of the first engaging portion 30a. Rotates clockwise in FIG. When the pressing portion 20 reaches the terminal portion 30c of the first engagement portion 30a and presses the terminal portion 30c, the reversing member 27 rotates counterclockwise as shown in FIG. It is positioned in.

When the reversing member 27 is positioned at the second rotation position, the switching member 34 connected to the other end of the reversing member 27
Is moved to the right second movement position. Thereby, the reproduction mode switching mechanism 36 switches the running mode of the tape from the forward mode to the reverse mode. In the state shown in FIG. 3, the pressing member 16 is rotated clockwise with respect to the operation lever member 2, and the first arm 26 a of the torsion coil spring 26 is attached to the first spring receiving portion 22 a of the pressing member 16.
And is separated from the first spring hook portion 24a.

Therefore, when the operation lever member 2 is returned from the rotated state to the state shown in FIG. 4, the first arm 16a of the torsion coil spring 26 is connected to the first spring receiving part 22a and the first spring receiving part 22a.
The pressing member 16 returns to the neutral position with respect to the operation lever member 2 by acting so as to press the spring hook portion 24a in the same direction. When the mode changeover switch (playback mode changeover switch) of the tape recorder is operated again, the operation lever member 2 is rotated, and the pressing member 16 is swung down. Since the reversing member 27 is reversed and is positioned at the second pivot position, the pressing member 16 that is swung down
5 is engaged with the second engaging portion 30b of the branch engaging portion 30 of the reversing member 27, and while the pressing portion 20 is in sliding contact with the inclined surface of the second engaging portion 30b, the pressing member 16 is Rotate counterclockwise. Then, the pressing portion 20 is moved to the second engagement portion 30a.
When the end portion 30d is pressed when the end portion 30d is reached,
The reversing member 27 rotates clockwise as shown in FIG. 6 and is positioned at the first rotation position.

When the reversing member 27 is located at the first rotation position, the switching member 27 is at the left first movement position. Thereby, the reproduction mode switching mechanism 36 switches the running mode of the tape from the reverse mode to the forward mode. In the state shown in FIG. 6, the pressing member 16 has been rotated counterclockwise with respect to the operation lever member 2, and the second arm 26 b of the torsion coil spring 26 has the second spring receiving portion of the pressing member 16. 22b and the first spring hook 2
4b.

Therefore, when the operating lever member 2 is returned from the rotated state to the state shown in FIG. 1, the second arm 16b of the torsion coil spring 26 is connected to the second spring receiving part 22b and the second spring receiving part 22b.
The pressing member 16 is returned to the neutral position with respect to the operation lever member 2 because the pressing member 16 acts so as to press the spring hook portion 24b in the same direction. In this way, every time the operation of the reproduction mode changeover switch is repeated, the running mode of the tape is switched between the forward mode and the reverse mode.

The present invention is not limited to the above-described embodiment, and various modifications are possible. For example, referring to FIG. 7, a modification of the mode switching device is shown. The mode switching device of this modified example has substantially the same structure as the mode switching device of one embodiment, and therefore, here, the same members and portions having the same functions as those of the one embodiment have the same structure. The description is omitted by attaching the reference numerals, and only the differences will be briefly described below.

In the mode switching device of the modified example, the pressing portion 20 of the pressing member 16 is bifurcated and has a concave portion 40 as shown in FIG. On the other hand, the reversing member 2
A pair of projections 42a and 42b are provided at one end of the projection 7 so as to be located on both sides of the rotating shaft 28. As described above, even if the paired relationship between the pressing portion 20 of the pressing member 16 and the one end of the reversing member 27 is changed, it goes without saying that the mode switching device of the modified example also has the same effect as that of the embodiment.

[0027]

As described above, according to the present invention,
The centering means simply spans a centering spring between the operation lever member and the pressing member, and has a simple structure. Further, since the centering spring is mounted on the rotation shaft of the pressing member and the operation lever member and both arms of the spring are arranged to extend on both sides of the shaft, the size of the operation lever member in the moving direction can be reduced. This allows
Since the mode switching device can be reduced in size, excellent effects such as reduction in size and thickness of the tape recorder can be achieved.

[Brief description of the drawings]

FIG. 1 is a plan view of a mode switching device.

FIG. 2 is a diagram showing a state where the apparatus has been operated from the state of FIG. 1 to the next stage.

FIG. 3 is a diagram showing a state in which the state shown in FIG. 2 is operated to a next stage.

FIG. 4 is a diagram showing a state in which the apparatus has been operated from the state of FIG. 3 to the next stage.

FIG. 5 is a diagram showing a state where the apparatus has been operated from the state of FIG. 4 to the next stage.

FIG. 6 is a diagram showing a state in which the apparatus has been operated from the state of FIG. 5 to the next stage.

FIG. 7 is a schematic plan view of a mode switching device according to a modification.

[Description of Signs] 1 Mode switching device 2 Operating lever member 4 Chassis 16 Pressing member 22a First spring hook portion 22b Second spring hook portion 24a First spring receiving portion 24b Second spring receiving portion 26 Torsion coil spring 27 Inverting member 34 Switching member

Claims (1)

(57) [Claims] 1. A provided reciprocally with respect to the tape recorder of the chassis (4), when in the first movement position is a tape running mode of the forward mode, the tape travel mode when in a second movement position a switching member for the reverse mode (34), movably to the chassis
An operation lever member (2) supported by the motor; and an operation lever member rotatably supported by the operation lever member.
A pressing member (16) extending from a point toward the switching member
Between the operating lever member and the pressing member.
The pressing member is in a neutral position with respect to the operating lever member.
A centering spring (26) for elastically holding the pressing member, and a spring between the switching member and the pressing member.
And is rotatably supported by the
The end has a pair of pressed parts (30) symmetrically on the left and right sides,
And a reversing member (27) connected to the switching member , wherein the operation lever member faces the switching member.
Each time the pair of pressed members are pressed,
Parts are alternately pressed to alternately move the switching member forward and backward.
In the mode switching device for a tape recorder to be moved, the pressing member has first and second spring supports on both sides of a rotation fulcrum.
The operating lever member includes first and second pressing members on both sides of the pressing member.
The centering spring has a second spring hooking portion (24a, 24b), and a center portion of the centering spring has a rotation fulcrum of a pressing member.
, One end of which is connected to the first spring receiving portion and the first spring hook.
And the other end is connected to the second spring receiving portion and the second spring receiving portion.
A torsion coil spring (26) locked to a spring hook
Mode switching device of a tape recorder according to claim Rukoto.