JP2521986Y2 - Push-button operation device for portable cassette tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a push button operating device for a portable cassette tape recorder in which the amount of operation of various operation push buttons in the tape cassette loaded state from the outer surface of the tape recorder main body is reduced. .

2. Description of the Related Art Miniaturization of a portable cassette tape recorder is extremely important for increasing its commercial value, and manufacturers are trying to make this as close as possible to the size of a cassette case which is a container for a tape cassette. Strive. Such a miniaturized product is called "cassette size" in the industry. In order to further reduce the size of such a so-called cassette size portable cassette tape recorder, reproduction, fast-forwarding, etc. It is also important to reduce the amount of protrusion of the operation push buttons, such as rewind and stop operations, from the outer surface of the tape recorder main body.

Since the push buttons for fast forward, rewind and stop operations are not directly related to the movement amount of the magnetic head, the maximum push amount of these push buttons can be reduced to about 2 mm. When the push button is integrally connected, the maximum push amount of the push button must be set to the maximum movement amount of the head mounting plate, and the push amount cannot be reduced as in other push buttons. This is because when inserting or removing a tape cassette, the magnetic head must be retracted to a position where it does not hinder the insertion or removal of the tape cassette. This is because the magnetic head must be moved forward to a predetermined position, and the maximum movement amount of the magnetic head must be set to about 4 mm, so that the reproduction operation push button also requires such a movement amount.

For this reason, it is particularly important to take measures to reduce the pressing amount of the reproduction operation push button. As a countermeasure for this, conventionally, for example, as seen in Japanese Utility Model Publication No. 64-2282,
A cassette holder inside the open / close lid of the cassette loading section,
With the magnetic head and pinch roller attached, open the open / close lid to load the tape cassette, insert the tape into the cassette holder with the tape surface facing forward, and make sure that the magnetic head has entered the tape cassette before opening the open / close lid. Try to close. By doing so, the pushing amount of the reproduction operation push button can be reduced, so that the projection amount of the reproduction operation push button from the outer surface of the tape recorder main body can be reduced.

(Problem to be Solved by the Invention) In such a conventional portable tape recorder, the capstan is provided on the chassis side of the tape recorder, and the pinch roller is provided on the opening / closing lid side. Maintain a high degree of parallelism of the
In order to stabilize the running of the tape, it is necessary to strengthen the assembly strength, such as by strengthening the hinge connection between the tape recorder body and the opening / closing lid, and to maintain the processing accuracy of each part at a high level. There was a high problem. Also, since the magnetic head needs to be provided on the hinge connection side of the opening / closing lid, the capstan must be arranged on the same side as this, so that when opening / closing the tape cassette, the capstan must be opened very wide. Cannot get in and out of the tape cassette. Therefore, for example, there is a problem that it is difficult to insert and remove the tape cassette in a narrow space where the user can insert and remove the tape cassette by hand in a bag.

The present invention has been made in view of the above circumstances, and it is possible to maintain a high degree of parallelism between the axis of the capstan and the axis of the pinch roller to stabilize tape running without significantly increasing assembly strength and processing accuracy. Thus, the cost can be reduced, the tape cassette can be easily inserted and removed in a narrow space, and the amount of protrusion of the various operation push buttons from the outer surface of the tape recorder main body when the tape cassette is loaded can be reduced. It is an object of the present invention to provide a push button operating device of a portable cassette tape recorder that can be further downsized.

(Means for Solving the Problems) In order to achieve the above object, a portable tape recorder of the present invention has a retracted position to which a magnetic head is attached and which allows a tape cassette to be loaded into a loading section, and reproduces the magnetic head. A head mounting plate capable of moving forward and backward between an advanced position to be located at the operating position, a playback operation push button integrally connected to the head mounting plate, protruding from the outer surface of the tape recorder main body, and advancing the head mounting plate by a pushing operation; and ,
A push-button for fast-forward operation, a push-button for rewind operation and a push-button for stop operation, which protrude from the outer surface of the tape recorder main body along with the push-button for playback operation and are each brought into a predetermined operation state by a push-in operation, A portable cassette tape recorder comprising: a pushbutton for holding a pushbutton for rewinding operation and a pushbutton for rewinding operation in a predetermined operation position, and releasing the holding by a pushing operation of the pushbutton for stop operation. The push-button for the fast-forward operation and the push-button for the rewind operation are larger than the protrusion amount of the reproduction operation push button from the outer surface of the tape recorder main body when the head mounting plate is retracted to the cassette attaching / detaching position which is detached from the head insertion hole of the tape cassette. , And the maximum amount of protrusion of the stop operation push button is reduced, and the reproduction operation push button is set in the reproduction mode. A playback operation push button holding mechanism that holds the cassette at a predetermined pushing position between the forward position for setting the tape and the cassette insertion / removal position, and the playback operation push button at the maximum projecting position only when the tape cassette is attached to or detached from the tape recorder body. It is characterized in that it is made to retreat until.

In particular, the playback operation push button holding mechanism is interlocked with the stopper that regulates the retreat position of the playback operation push button pushed in from the maximum projecting position, and the opening and closing lid that enables the tape cassette to be inserted and removed from the tape recorder body. And a mechanism for releasing the restriction by the stopper.

Further, the reproduction operation push button holding mechanism is provided with a mechanism for moving the reproduction operation push button, which is at the maximum protruding position, forward to the retreat amount regulating position in conjunction with closing of the opening / closing lid.

(Operation) According to the above configuration, the reproduction operation pushbutton, which has a maximum protrusion amount from the tape recorder main body outer surface larger than the fast-forward operation pushbutton, the rewind operation pushbutton, and the stop operation pushbutton, is a tape cassette with respect to the tape recorder main body. At the time other than the insertion and removal of the cassette, the playback operation push button holding mechanism holds the cassette at a predetermined pushing position between the forward position for setting the playback mode and the cassette insertion / removal position. The amount can be kept small, and the protrusion amount can be made uniform.

Also, since the reproduction operation push button is retracted to the maximum protruding position only when the tape cassette is inserted or removed, the tape cassette can be easily inserted and removed without being disturbed by the magnetic head.

Further, the restriction of the retraction position of the reproduction operation push button is released in conjunction with the opening of the opening / closing lid, or the reproduction operation push button is advanced to the retraction restriction position in conjunction with the closing, so that the operability of the reproduction operation push button in normal use is impaired. Will not be heard.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. First
FIGS. 1 to 7 show an embodiment of the present invention. FIG. 1 is a plan view of a portable tape recorder according to the present invention, in which 1 is a tape recorder main body. An opening / closing wall 2 that covers the loading section is provided to be openable and closable. The tape recorder main body 1 is reduced in size to a degree slightly larger than a cassette case which is a container of the tape cassette 3, and a chassis 4 is fixed inside the tape recorder main body 1. The chassis 4 has a rectangular shape whose plan shape is elongated in the left-right direction.

The length of the chassis 4 in the left-right direction is set substantially equal to the length of the long side 3a of the tape cassette 3. The length of the chassis 4 in the front-rear direction is set to approximately 2/3 of the length of the short side 3b of the tape cassette 3. The chassis 4 has a step portion 4a at a substantially middle portion in the front-rear direction over the entire left-right direction, and the front side portion 4b is one step lower than the rear side portion 4c through the step portion 4a.

A thin motor 5 is attached to the center of the lower surface of the rear side 4c of the chassis 4 with screws 5b with the rotating shaft 5a facing downward. The outer diameter of the case 5c of the motor 5 is set substantially equal to the length of the rear side 4c of the chassis 4 in the front-rear direction. On the rear side 4c of the chassis 4, reel shafts 6a and 6b are rotatably disposed on the left and right sides of the motor 5. At the center of the upper surface of the front side 4b of the chassis 4, a head mounting plate 7
Are slidably provided in the front-rear direction (the directions of arrows A and B). The head mounting plate 7 is used for the tape recorder main body 1.
Reciprocating (moving forward / backward) between a retracted position at which the tape cassette 3 can be loaded into the cassette loading portion and a forward position at which the magnetic head 8 described below is positioned at the reproducing operation position. The spring is biased in the retreating position direction (arrow B direction). A reproducing magnetic head 8 is mounted on the front upper surface of the head mounting plate 7. When the head mounting plate 7 is at the forward position, the magnetic head 8 comes into contact with the tape via a head insertion hole (not shown) of the tape cassette 3.

On the lower surface side of the front side 4b of the chassis 4, push buttons 9, 10, 11, and 12 for stop, rewind, playback, and fast-forward operations are arranged in the front-rear direction (arrows A and B directions) from left to right in FIG. ) Is slidably provided. These push buttons 9 to 12 are urged in the non-operation direction (the direction of arrow B) by the corresponding return springs 13, 14, 15, and 16, respectively. The reproduction operation push button 11 is integrally connected to the head mounting plate 7. Each of these push buttons 9 to 12 protrudes outward from the outer surface of one side wall 1a of the tape recorder body 1. The maximum protrusion amounts of the stop, rewind, and fast-forward operation push buttons 9, 10, and 12 from the outer surface of the side wall 1a of the tape recorder main body 1 are the same. In addition, the tape recorder main body 1 of the push button 11 for reproduction operation
The maximum protrusion amount L from the outer surface of one side wall 1a is larger than the maximum protrusion amount of the other push buttons 9, 10, 12 by L ₁ (for example, about 2 mm).

A slide plate (slide member) 18 is provided on the lower surface side of the front side 4b of the chassis 4 so as to be movable in the left-right direction (the directions of arrows C and D in FIG. 2). As shown in FIGS. 2 and 4, the slide plate 18 has an engagement piece 19 bent downward at one end thereof and movably engages with an elongated hole 20 formed in the chassis 4. Have been. The slide plate 18 is
As shown in the figure, a long hole 21 drilled near the other end,
It is movably engaged with an engagement pin 22 protruding from the chassis 4. The other end of the slide plate 18 is provided with a stopper 23 composed of an upward projection. The stopper 23 regulates the amount of movement of the head mounting plate 7 in the retreating position direction (the direction of arrow B). That is, the head mounting plate 7 is provided with a contact portion 24 that contacts the stopper 23. When the contact portion 24 comes into contact with the stopper 23 so as to be freely detachable, the head mounting plate 7 moves the reproducing operation push button 11 until the projection amount of the other push buttons 9, 10, 12 becomes the same as the maximum projection amount. It retreats and is stopped and held at that position. Therefore, the slide plate 18
, The stopper 23 and the contact part 24 constitute a push button holding mechanism for reproduction operation.

The slide plate 18 is pushed in one direction (arrow C) by the pressing force of the pressing spring 25 by pushing the push button 11 for reproduction operation in the direction of arrow A.
Direction), the stopper 23 faces the contact portion 24, and the contact portion 24 can contact the stopper 23. Press spring 25
Is composed of a torsion coil spring, and its coil portion 25a is fitted to a spring hook pin 26 protruding from the upper surface of the chassis 4. The straight portion 25b on one side of the pressing spring 25 is
Abuts the base end of the knob piece 27 protruding from the
25c is in contact with a spring hook 29 provided on an opening / closing lid locking member 28 rotatably mounted on the upper surface of the chassis 4. The lid locking member 28 is urged by a pressing spring 25 in one direction (counterclockwise in FIG. 2), that is, in a direction for locking the open / close lid 2 in a closed state. And slide plate 18
A finger on the knob piece 27 of the
The stopper 23 is disengaged from the contact portion 24 by moving the head mounting plate 7 in the other direction (the direction of arrow D) against the urging force of the head, and the return movement in the direction of the retracted position (the direction of arrow B) of the head mounting plate 7 is allowed Is done. When the slide plate 18 moves in the direction of the arrow D against the urging force of the pressing spring 25, the lid locking member 28 is moved in the other direction by the one end of the slide plate 18 against the urging force of the pressing spring 25. (Clockwise in FIG. 2) to rotate the open / close lid 2
Is released.

Extension pieces 7a, 7b extending to the right and left rear edges of the head mounting plate 7.
Is slidably extended downward on the rear side 4c side of the chassis 4 through a slit 4d provided in the step portion 4a of the chassis 4. Capstans 30a and 30b are provided on the upper surface of the front side 4b of the chassis 4 so as to be rotatable at right and left sides of the head mounting plate 7. Pinch roller arms 31a, 31b are mounted on the upper surface of the front side 4b of the chassis 4 on the left and right sides of the head mounting plate 7 so as to be rotatable about shafts 32a, 32b. Pinch rollers 33a and 33b are rotatably supported by these pinch roller arms 31a and 31b. These pinch rollers 33a, 33b come into contact with and separate from the corresponding capstans 30a, 30b. A head mounting plate 7 is provided on the upper surface of the front side 4b of the chassis 4.
The idle gear support arms 34a and 34b are mounted on the left and right sides of the capstan 30a and 30b so as to be rotatable around the capstans 30a and 30b. The gear supporting portions of the idle gear supporting arms 34a and 34b extend to the lower surface side of the rear side portion 4c of the chassis 4 through the slit 4d of the step portion 4a of the chassis 4. On the upper surface of the front side 4b of the chassis 4, cassette guides 35a and 35b are provided so as to project right and left of the head mounting plate 7. Tape guides 36a and 36b are mounted on the left and right sides of the upper surface of the front side of the head mounting plate 7, respectively. A tape running direction switching plate 37 is slidably movable in the left-right direction on the front edge side upper surface of the front side portion 4b of the chassis 4.
Is provided. On the left side of the upper surface on the front edge side of the front side 4b of the chassis 4, a tape running direction switching lever 38 and a toggle spring 39 are provided.
Are provided.

Flywheels 40a, 40b are fixed to the lower ends of the capstans 30a, 30b at the lower surface of the front side 4b of the chassis 4. A pulley 41 is rotatably supported on the right side in FIG. 2 of the lower surface of the front side of the front side 4b of the chassis 4 in FIG. The flywheels 40a, 40b and the pulley 41 are connected to a small-diameter motor pulley 4c fixed to the rotating shaft 5a of the motor 5 via an endless belt 42.
a and 30b are rotated. The idle gears 43a and 43b are rotatably supported by the gear support portions of the idle gear support arms 34a and 34b. These idle gears 43a, 43b mesh with a drive gear (not shown) fixed to the upper surfaces of the flywheels 40a, 40b. The reel rotation transmission control lever 44 is located on the left and right sides of the motor 5 on the lower side of the rear side 4c of the chassis 4.
a, 44b, and brackets 45a, 45 that hold the levers 44a, 44b and the reel shafts 6a, 6b and are equipped with an intermediate gear (not shown).
b is provided. Double reel rotation transmission control lever 44
a, 44b and the idle gear support arms 34a, 34b
They are connected so as to attract each other via 46a and 46b.

In FIG. 2, 47 is a push button 11 for reproduction operation and rewind,
When the push buttons 10 and 12 for fast-forward operation are pushed into the operation position, a spring for urging a locking plate (not shown) for locking each of the push buttons 10 to 12 in the pushing position in the locking direction is provided. This is a switch operation plate that turns on and off a motor switch (not shown) in conjunction with the operation push button 11 or the rewind and fast-forward operation push buttons 10 and 12. Further, the chassis 4 is provided with a tape end detecting mechanism (not shown) for switching the tape running direction when the rotation of the reel shafts 6a and 6b is stopped by winding the tape to the end. Also,
In the space between the rear edge of the rear portion 4c of the chassis 4 and the other side wall 1b of the tape recorder body 1, a plurality (for example, two) are provided.
(For example, AA) 49, 49 are stored.

Next, the operation of the push button operating device of the portable cassette tape recorder having the above-described configuration will be described with reference to FIGS.

FIG. 5 shows a state where the tape cassette 3 is mounted and the opening / closing lid 2 is closed. In this state,
The head mounting plate 7 is moved in the direction of arrow B to a retracted position where the tape cassette 3 can be loaded into the cassette loading section, and the magnetic head 8 is located outside the tape cassette 3 and has a push button for reproduction operation. 11 projects longer than the other push button 9, 10, and 12 to L ₁ only toward outside one side wall 1a of the tape recorder main body 1.

In the state shown in FIG. 5, the reproduction operation push button 11
The pushed in the arrow A direction by L _1, the held playback operation pushbutton holding mechanism, align the protruding amount and the other push button. At this time, the magnetic head 8 slightly enters the tape cassette 3 as shown in FIG. Also, a push button 11 for reproduction operation
Is pushed in all the way, the head mounting plate 7 moves forward in the same direction, and the magnetic head 8 reaches the forward position where the reproducing operation position is located. Thereby, the magnetic head 8 comes into contact with the tape to perform the reproducing operation. Also, the head mounting plate 7
Moves from the retracted position to the forward position,
When the stopper 23 comes off the blocking portion 7c of the head mounting plate 7, the slide plate 18 moves in the direction of arrow C by the urging force of the pressing spring 25, and the stopper 23 faces the contact portion 24 (Sixth Embodiment). State in the figure).

In the reproducing operation state shown in FIG. 6, when one of the stop, rewind, and fast-forward push buttons 9, 10, and 12, for example, the stop operation push button 9, is pressed, the head mounting plate 7 moves in the direction of arrow B. Then, the contact portion 24 comes into contact with the stopper 23. As a result, the head mounting plate 7 is stopped and held at the position between the advance position and the retreat position, and returns to the state shown in FIG. 7, and the reproduction operation push button 11 is located outside the one side wall 1a of the tape recorder body 1 outside the one side wall 1a. The amount of protrusion in the direction is substantially the same as that of the other push buttons 9, 10, 12. In this state, the magnetic head 8 is separated from the tape, but slightly enters the head insertion hole of the tape cassette 3.

After the reproduction operation is once performed in this way, the reproduction operation push button 11 is restored only halfway even by the stop operation.

In order to take out the tape cassette 3 from the state shown in FIG. 7, when the finger is put on the knob piece 27 and the slide plate 18 is moved in the direction of arrow D, the stopper 23 comes off the contact portion 24, and the head mounting plate Numeral 7 moves in the direction of arrow B to reach a retracted position where the tape cassette 3 can be loaded into the cassette loading section, and the magnetic head 8 is located outside the tape cassette 3. Furthermore, a finger is put on the knob piece 27 and the slide plate 18 is moved with an arrow D.
In this case, the opening / closing lid locking member 28 rotates clockwise in FIG. 2 to release the locking of the opening / closing lid 2. Therefore,
The tape cassette 3 can be taken out by opening the cover 2.

Next, another embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same portions as those in the embodiment shown in FIGS. 1 to 7 will be described by attaching the same reference numerals to the drawings. In this embodiment, when the opening / closing lid 2 is closed and the opening / closing lid 2 is closed, the reproducing operation push button 11 is extended to the maximum extent of the other push buttons 9, 10, 12 by interlocking the opening / closing lid 2 with the head mounting plate 7. It is designed to be advanced to a position where the amount of protrusion is substantially the same as the amount. That is, the protrusion 50 having the inclined surface 50a and the locking step 50b is provided on the upper surface of the head mounting plate 7.
And an engaging pin 51 that slides on the inclined surface 50a of the projection 50 and locks on the locking step portion 50b is fixed to the inner surface of one side of the opening / closing lid 2 by protrusion. In a state where the opening / closing lid 2 is opened to take out the tape cassette from the cassette loading portion of the tape recorder main body 1, the engagement between the projection 50 and the engagement pin 51 is released as shown in FIG. The head mounting plate 7 has moved to a retracted position which enables the tape cassette 3 to be loaded into the cassette loading section by the biasing force of the return spring 15.

When the cover 2 is closed from the state of FIG. 8,
While the opening / closing lid 2 is closing, the engagement pin 51
By sliding on the inclined surface 50a of 50 and pressing it,
The head mounting plate 7 moves in the direction of the arrow A against the urging force of the return spring 15 to a position where the maximum protrusion amount of the reproduction operation push button 11 is substantially the same as the maximum protrusion amount of the other push buttons 9, 10, and 12. When the opening and closing cover 2 is completely closed, the engagement pin 51 engages with the locking step 50b of the projection 50, so that the head mounting plate 7 receives the urging force of the return spring 15. On the contrary, the moving position, that is, the protrusion amount of the reproduction operation push button 11 is held at the position where it is almost the same as the maximum protrusion amount of the other push buttons 9, 10, 12, and the state shown in FIG. 9 is obtained.

When the locking of the opening / closing lid locking mechanism is released from the state of FIG. 9, the engaging pin 51 is disengaged from the projection 50, and the head mounting plate 7 is moved to the retracted position by the urging force of the return spring 15, Subsequently, the opening / closing lid 2 is opened to return to the state shown in FIG. 8, and the tape cassette 3 can be taken out from the cassette loading section.

Therefore, in this embodiment, the projection 50 and the engagement pin 51 constitute a push button holding mechanism for reproduction operation.

(Effects of the Invention) As described above, according to the portable tape recorder of the invention,
Since the playback operation push button integrated with the head mounting plate is held at a predetermined pushing position by the playback operation push button holding mechanism except when the tape cassette is inserted into and removed from the tape recorder main body, the push button during normal portable use is used. The amount of protrusion can be reduced, and the amount of protrusion can be aligned with another push button such as a stop operation push button.

Then, only when the tape cassette is inserted or removed, the playback operation push button is retracted to the maximum projecting position, and the magnetic head mounted on the head mounting plate is sufficiently separated from the tape cassette, so that the magnetic head is not obstructed and the space is narrow. Thus, the tape cassette can be easily inserted and removed.

In addition, since the retraction position restriction of the reproduction operation push button is released in conjunction with the opening of the opening / closing lid, or the reproduction operation push button is advanced to the retraction restriction position in conjunction with the closing, the operability of the reproduction operation push button in normal use is impaired. The effect that there is no such thing is produced.

[Brief description of the drawings]

1 to 7 show an embodiment of the present invention, FIG. 1 is a plan view of a portable cassette tape recorder provided with a push-button operating device according to the present invention, and FIG. 2 is a plan view of the internal mechanism. , FIG. 3 is a bottom view of the same, FIG. 4 is an enlarged perspective view of the essential parts, FIGS. 5 to 7 are operation explanatory views, and FIG. 8 is a portable cassette tape showing another embodiment of the present invention. FIG. 9 is a side view of the recorder with the open / close lid opened, and FIG. 9 is a side view of the recorder with the open / close lid closed. DESCRIPTION OF SYMBOLS 1 ... Tape recorder main body, 2 ... Open / close lid, 3 ... Tape cassette, 7 ... Head mounting plate, 9 ... Stop operation push button, 10 ... Rewind operation push button, 11 ... Reproduction operation push button ,
12: Fast forward operation push button, 18: Slide plate (slide member), 23: Stopper, 24: Contact part, 50: Projection,
51 ... engagement pin.

Claims (4)

(57) [Scope of request for utility model registration] A reproducing operation push button (11) integral with a head mounting plate (7), which protrudes from an outer surface of the tape recorder main body (1) and sets a reproducing mode by performing a pushing operation against a return spring; The push button for reproduction operation is arranged side by side, the amount of protrusion from the outer surface of the tape recorder main body is smaller than that of the push button for reproduction operation, and a predetermined operation mode is set by performing a push operation against a return spring. Push button for fast forward operation (1
2), a rewind operation push button (10), a stop operation push button (9), an opening / closing lid (2) for covering the cassette loading section, and limiting the amount of protrusion of the reproduction operation push button from the outer surface of the tape recorder main body. And a holding mechanism for releasing the restriction by an operation of opening the open / close lid. 2. The portable device according to claim 1, wherein the holding mechanism inhibits the return of the reproduction operation push button when the reproduction operation push button is pressed halfway from a maximum projecting position. Push button operation device for cassette tape recorder. The holding mechanism comprises a part of the head mounting plate, a reciprocally movable slide plate (18), and a spring (25) for moving the slide plate in one direction. When the push button is at the maximum protruding position, the head mounting plate prohibits the movement of the slide plate in one direction, and when the reproduction operation push button is pushed halfway, the prohibition of the slide plate is released and the head is mounted. The push button operating device for a portable cassette tape recorder according to claim 2, wherein the slide plate is retracted from the return path of the head mounting plate by an operation of moving the plate to a return path and opening the open / close lid. 4. The holding mechanism comprises a part (50) of the head mounting plate and a part (51) of the opening / closing lid. Engage with a part of the mounting plate to advance the reproduction operation push button from the maximum projecting position by a predetermined amount, release the engagement with the opening / closing lid, and return the reproduction operation push button to the maximum projection position. The push-button operating device for a portable cassette tape recorder according to claim 1, wherein