JPH0531695Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a recording and reproducing device that is most suitable for application to, for example, a small cassette tape recorder.

[Summary of the idea]

The present invention provides a recording and reproducing device such as a cassette tape recorder in which the movement of the head mount and the operation of a switch etc. are performed simultaneously by operating the operation button, the operation button, the head mount, the switch, etc. By configuring the operating rod from a single component, it is possible to reduce the number of parts and the number of assembly steps for the recording/reproducing device.

[Conventional technology]

Conventionally, in tape recorders, etc., when an operation button such as a playback button or a record button is pressed, a head mount to which a magnetic head such as a recording/playback head or an erase head is attached is moved in an interlocking manner using levers, links, springs, etc. In addition to operating the movement via the mechanism, a switch for operating the motor, etc., was operated by a part of the interlocking mechanism or an operating lever operated in conjunction with the interlocking mechanism.

[Problem that the invention attempts to solve]

Therefore, conventional tape recorders, etc., have a structure in which the head mount can be moved and switches can be operated simultaneously by operating the operation button, so the number of parts and assembly man-hours are extremely large, resulting in a significant increase in cost. .

The present invention consists of an operation button, a head mounting base, and an operation rod such as a switch made of a single component.

[Means for solving problems]

The present invention consists of a head mount for attaching a magnetic head, an operation button such as a playback button that moves the head mount, and an operation rod such as a playback button that is operated by the operation button to operate a switch or the like. are integrally molded together from synthetic resin.

[Effect]

In the present invention, the operation button, the head mounting base, and the operation lever for a switch or the like are composed of a single molded part.

〔Example〕

An embodiment of a cassette tape recorder to which the present invention is applied will be described below with reference to the drawings. The cassette tape recorder shown here is a reproduction-only machine that uses a compact cassette.

First, the entire cassette tape recorder will be explained with reference to FIGS. 3 to 6.

First, a conventionally known cassette (compact cassette) 1 has a pair of left and right reel hubs 2a, 2b inside.
A cassette tape 3, which is a magnetic tape wound around the tape, is housed in the head insertion hole 4, a pair of left and right pinch roller insertion holes 5a and 5b, capstan insertion holes 6a and 6b, and a cassette positioning pin insertion hole 7.
a, 7b, reel stand insertion holes 8a, 8b, etc. are provided.

Next, the printed circuit board 10 constitutes the electronic circuit of the tape recorder, and a large number of electronic components 12 are mounted at predetermined locations on a printed wiring pattern 11. In this case, the upper surface 10a of the printed circuit board 10 constitutes the wiring pattern surface, and the lower surface 10b constitutes the component mounting surface.

Next, this printed circuit board 10 is used as a chassis for a tape recorder, and this printed circuit board 10 has a pair of left and right reel stands 13.
a, 13b, a cassette mounting table 14, a cassette pressing spring 15 made of a leaf spring, a pair of left and right cassette positioning pinch rollers 16a, 16b, a capstan 17, a motor 18, a magnetic head 19 as a playback head, a pinch roller 20, a tape guide 21 ,
A head mounting base 22, push buttons such as a play button 23, a fast forward button 24, and a stop button 25, mechanical parts such as a push button lock plate 26, and various other mechanical parts such as various springs, levers, and switches are attached.

By the way, the pair of left and right reel stands 13a, 13b
is rotatably attached to the upper surface 10a of the printed circuit board 10 via a pair of left and right reel stand bearings 28, and similarly, the cassette mounting table 14 and the cassette pressing spring 15 are also attached to the upper surface 10a of the printed circuit board 10.
attached to the side.

In addition, a pair of left and right cassette positioning pins 16
a, 16b, a capstan 17, and a motor 18 are attached to the upper part of a guide base 29 made of synthetic resin. However, the cassette positioning pins 16a and 16b are integrally molded on the guide base 29, and the capstan 17 and motor 18 are rotatably and fixedly attached to a capstan bearing 30 and a motor mounting portion 31 that are integrally molded on the guide base 29. There is. The guide base 29 has a structure in which a pair of locking claws 32 integrally formed at both longitudinal ends of the guide base 29 are locked into a pair of locking holes 33 provided in the printed circuit board 10. It is removably attached to the side. and cassette positioning pin 16a,
16b and capstan 17 are printed circuit board 10
From the insertion holes 34a, 34b, 35 provided in the upper surface 1
It protrudes toward the 0a side. The motor 18 is connected to a predetermined location of the wiring pattern 11 of the printed circuit board 10 by a lead wire 50.

Further, the magnetic head 19, pinch roller 20, and tape guide 21 are attached to the upper part of a head mount 22 made of synthetic resin. However, the tape guide 21 is integrally molded with the head mounting base 22. The head mounting base 22 is arranged on the upper surface 10a side of the printed circuit board 10, and the guide base 22
The head mounting base 22 is mounted on a pair of protrusions 37 that are integrally molded on the upper part of the printed circuit board 9 and protrude from an opening 36 provided in the printed circuit board 10 toward the upper surface 10a, and the head mounting base 22 is integrally molded on the lower part of the protrusion 37. T did
The shaped guide piece 38 and the pair of locking claws 39 are locked in guide holes 40 and 41 provided in the printed circuit board 10 and the guide base 29, so that the shaped guide piece 38 and the pair of locking claws 39 can be slidably attached to and detached from the upper surface 10a of the printed circuit board 10. installed.

Further, the push button lock plate 26 is slidably screwed to the lower part of the guide base 29 by a pair of set screws 43 inserted through a pair of elongated holes 42 provided at both ends of the push button lock plate 26 in the longitudinal direction. Push buttons such as a fast forward button 24 and a stop button 25 are arranged between a guide base 29 and a push button lock plate 26, and these push buttons have a T-shaped guide piece 4 integrally formed on the upper part thereof.
4, 45 as printed circuit board 10 and guide base 2
It is slidably attached to guide holes 46 and 47 provided in 9. However, the regeneration button 23 is integrally molded with the head mounting base 22. The sliding members such as the head mounting base 22, fast forward button 24, stop button 25, push button lock plate 26, etc. are each biased back by a return spring 48, and the motor 18, reel stand 13b, and capstan 17 are interlocked by a belt 49.

The cassette tape recorder is constructed as described above, with the cassette 1 mounted horizontally on the top surface 10a of the printed circuit board 10 as shown by the chain lines in FIGS.
3a and 13b, and the cassette tape 3 is wrapped around the capstan 17. At this time, the cassette 1 is attached to the cassette positioning pins 16a and 16b.
The cassette 1 is engaged with and placed on the cassette mounting table 14 and fixed by the cassette pressing spring 15, so that the cassette 1 is horizontally positioned at a predetermined height position with respect to the guide belt 29.

After the cassette is installed, when the playback button 23 is pushed in the direction of arrow a from the backward movement position indicated by the chain line to the forward movement position indicated by the solid line in FIG.
8 to the forward position, and a lock pin 51 formed integrally with the lower part of the head mount 22 is locked by a lock hole 52 in the push button lock plate 26. And magnetic head 19, pinch roller 2
0. The tape guide 21 is inserted into the cassette 1, the magnetic head 19 and the tape guide 21 are brought into contact with the cassette tape 3, and the cassette tape 3 is pressed onto the capstan 17 by the pinch roller 20. Then, the switch 54 attached to the printed circuit board 10 by the head mounting base 22 is operated, the motor 18 is operated, and the reel base 13b and the capstan 17 are rotationally driven. The cassette tape 3 is then run at a constant speed by the capstan 17 to perform desired reproduction.

In addition, when the fast forward button 24 is pressed, the switch 5 is also pressed.
4 is operated, the motor 18 is operated, and the cassette tape 3 is fast-forwarded by the reel stand 13b.

Furthermore, when the stop button 25 is pressed during playback or fast forward, etc., the head mounting base 22 or the fast forward button 24 are unlocked by the push button lock plate 26, and these are moved back by the return spring 48 and the switch is turned off. 54
is turned off, and the motor 18 is stopped.

Next, the main parts of the cassette tape recorder will be explained with reference to FIGS. 1 to 3.

First, tape guide 21 and head mounting base 22
, a playback button 23 which is an operation button, and an operation rod 56 having a pin 55 for operating a switch 54 are integrally molded with each other from synthetic resin.
These four parts are constructed into a single molded part. At the bottom of the head mounting base 22 are a T-shaped guide piece 38, a pair of locking pieces 39, and a lock pin 51.
etc. are also integrally molded. And switch 54
is composed of a leaf switch, mounted on the lower surface 10b of the printed circuit board 10, and connected to the wiring pattern 11 on the upper surface 10a. A pin 55 integrally formed at the bottom of the tip of the operating rod 56 is inserted into the bottom surface 1 from a long hole 57 provided in the printed circuit board 10.
This pin 55 is protruded to the 0b side and is connected to the switch 5.
It is configured to operate 4. Note that the push buttons such as the fast forward button 24 and the stop button 25 are molded from synthetic resin, and in particular, the pin 59 at the top of the tip of the operating rod 58 integrally molded with the fast forward button 24 is also designed to operate the switch 54. It is configured.

Therefore, according to this cassette tape recorder, as described above, the playback button 23 is
When you press the button from the backward movement position indicated by the chain line to the forward movement position indicated by the solid line in the figure, the playback button 23 will directly activate the head mounting base 2.
2 is pressed and the head mounting base 22 is moved to the forward position, and at the same time, the pin 5 of the operating rod 56 is pressed.
5, the switch 54 is operated. Note that when the fast forward button 24 is pressed, the operation lever 5
The switch 54 is operated by the pin 59 of No.8.

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments, and various effective changes can be made based on the technical idea of the present invention.

For example, in addition to the switch 54, the operating lever 56 shown in the embodiment can be used as an operating lever for various purposes such as releasing the reel stand brake or switching the idler.

Furthermore, the present invention is not limited to cassette tape recorders, but can be applied to various other recording and reproducing apparatuses.

[Effect of idea]

In this invention, the operation button, head mounting base, and operation lever for switches, etc. can be constructed from a single molded part, so the number of parts and assembly man-hours can be greatly reduced. It is possible to improve productivity and reduce costs. Moreover, since the operation stroke of the operation button and the movement stroke of the head mount and operation rod can be configured in a one-to-one ratio, not only is design and manufacturing easy, but the operation button, head mount, and operation rod can be easily connected. Since the looseness that tends to occur between these three parts such as levers, links, springs, etc. that are interlocked by interlocking mechanisms can be eliminated, operability and reliability of operation are improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a cross-sectional view of the main part (Fig. 3 - arrow direction), Fig. 2 is an exploded perspective view of the main part, and Fig. 3 is the whole. The plan view, FIGS. 4 and 5 are exploded perspective views of the whole,
FIG. 6 is a sectional view of FIG. 3. In addition, in the reference numerals used in the drawings, 19...magnetic head, 22...head mounting base, 23...playback button, 54...switch, 56...operation rod.

Claims (1)

[Scope of utility model registration request] A record in which a head mount for attaching a magnetic head, an operation button for moving the head mount, and an operation rod for operating a switch, etc. by means of the operation button are integrally molded from synthetic resin. playback device.