JP2833217B2 - Cassette loading mechanism - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tray-type loading mechanism for a compact cassette.

2. Description of the Related Art Conventionally, most of the cassette loading mechanisms of this type take in and out a tape playing mechanism itself. In the method in which the cassette is placed on the tray, a space for the magnetic head is required on the magnetic tape side of the cassette as the arrangement of the tape playing mechanism, so that the magnetic tape surface of the cassette is located farther from the cassette mounting position.

FIG. 12 and FIG. 13 are plan views in which this is simply written. FIG. 12 shows the cassette mounting / dismounting position, and FIG. 13 shows the mounting position. Reference numeral 17 denotes a housing, which shows a loading arrangement. Since the tape playing mechanism 1 has a space for the magnetic head 15, to reduce the tray movement stroke,
The magnetic head side must be located at the back as shown in the figure. As a result, the cassette 5 on the tray 4 must also be placed with the magnetic tape surface facing backward.

In addition, a switch for detecting the moving position of the tray and the driving position of the loading mechanism is provided for each detection position.

Problems to be Solved by the Invention As described above, the conventional cassette loading mechanism has a problem that the number of switches is large and the ON / OFF of the switches is unstable due to the variation in the mounting accuracy of the switches.

The present invention has been made in view of the above-described conventional problems, and has a
An object of the present invention is to provide a cassette loading mechanism capable of improving FF accuracy and improving switch mounting.

Means for Solving the Problems To solve the above problems, a cassette loading mechanism according to the present invention comprises a tape playing mechanism, a tray for horizontally moving from a cassette attaching / detaching position to a tape playing mechanism mounting position, and a horizontal A cassette receiving plate movably guided, a coupling mechanism that engages with the tray and associates respective strokes, a driving rack for driving the coupling mechanism, and movement of the tray and the driving rack, the motor of the motor being driven. A switch lever for turning the switch ON and OFF, and a switch lever spring for pressing a fulcrum of the switch lever supported by a support shaft of the switch lever so as to be movable by a predetermined amount by a U-shaped receiving portion 3C, the tray comprising: When the amount of pushing of the switch lever by the drive rack is large, the switch lever spring is deformed and pushed. It is obtained by adapted to absorb an amount of Barakki.

Further, the switch lever is held between the base and the base by a switch lever spring so that the support shaft of the switch lever does not separate from the base.

Further, by forming the tip of the convex portion provided at the center of the spindle portion of the switch lever at a position slightly away from the switch, the switch lever spring is pressed, and the switch lever is rotated and returned in the direction away from the switch. It was done.

A drive gear is provided by a tray guided by the base and movable in the horizontal direction, a drive rack guided by the tray 4 and movable in the horizontal direction with respect to the tray, and a lock lever pivotally supported by the tray. When the drive rack driven by the tray moves horizontally with the tray, the drive rack is configured to be distinguished from when the tray stops and only the drive rack moves. Thus, the cassette mounting / dismounting position, the storage position, the cassette mounting performance position, and the fact that the tray and the drive rack are passing are distinguished.

Also, a convex portion 4g formed before and after the side of the tray, and
4f, the two upper switch levers and the lower switch lever are arranged to be driven, and when the tray is driven to the storage position, the protrusions are pivoted to U-shaped receiving portions formed on the side surfaces of the base. By pressing one end of one of the supported switch levers, and pressing the other switch disposed on the opposite side of the support shaft by the other end of the switch lever, it is configured to detect the tray storage position, and After the tray is stopped at the storage position, the switch is guided by the tray, and a convex portion formed on the side surface of the driven drive rack pushes one end of the other switch lever and is disposed on the other side of the support shaft. By pressing the other end of the other switch lever, the playing position is detected, and the storage position and the combination of ON and OFF of the two switches at the playing position can be distinguished from the storage position. To control the speed of the drive rack reaching the Kanade position, which is constituted so as to reduce mechanical noise, occurrence of an impact.

Operation According to the present invention, when the switch lever is pushed by the tray and the drive rack, the switch lever spring deforms and absorbs the variation in the mounting accuracy of the switch, so that the mechanical load does not increase. Further, according to the present invention, the switch lever does not come off from the base only by setting the switch lever spring by the above configuration. Further, according to the present invention, the switch lever spring presses the tip of the convex portion provided on the switch lever so that the switch lever is surely returned to the rotation. In the present invention, four modes can be switched by two switches. Further, according to the present invention, by detecting the storage position of the tray, the speed of the drive rack between the storage position and the playing position can be controlled to reduce the occurrence of mechanical noise and impact.

Embodiment Hereinafter, a cassette loading mechanism according to an embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 1 is a side view of this embodiment, FIG. 2 is a plan view,
This is the cassette tape attaching / detaching position. FIG. 1A is a left side view, FIG. 1B is a state where the left base 3 and the tray 4 are cut out,
(C) and (d) are cross-sectional views of main parts drawn and drawn to make it easy to understand the relationship between components inside the tray 4.

In the figure, reference numeral 1 denotes a tape playing mechanism, which is fixed by a right base 2 and a left base 3. Right base 2 and left base 3
Has a guide portion, and the tray 4 can be moved only in the horizontal direction. One end 6a of the cassette receiving plate 6 on which the cassette tape 5 is placed is engaged with the groove 4a of the tray 4, and the other end 6b is inserted into a hole 7a of the slide plate 7 and is rotatably supported. The slide plate 7 is guided by the convex portion 4b of the tray 4 in the elongated hole portion 7b, and is movable in the tray 7 in the horizontal direction. Reference numeral 8 denotes a connecting lever, and the hole 8a is a shaft of the tray 4.
4c is rotatable. One end 8b is a slide plate 7
And the gear portion 8c centered on the hole 8a is engaged with the rack portion 2a of the right base 2. Reference numeral 9 denotes a drive rack, which is guided by the groove of the tray 4 and is movable in the horizontal direction with respect to the tray.

The drive rack 9 has a cam portion 9a, which can be engaged with the convex portion 6c of the cassette receiving plate 6. The state shown in FIG. 1 is not engaged. Reference numeral 10 denotes a lock lever, which is rotatably attached to the shaft 4d of the tray 4 and is urged counterclockwise by a spring 16. In FIG. 2, the lock lever 10 is locked by a stopper in the tray, one end 10a of the lock lever 10 is at an engagement position with one end 9a of the drive rack 9, and the drive rack 9 is fixed in the tray 4. I have.

A motor 11 is fixed to the left base 3, and a pulley gear 12 and a drive gear 13 are rotatable on the erected shaft.
The rotational force of the motor is transmitted from the pulley gear 12 to the drive gear 13 via the belt 14, and meshes with the rack portion 9c of the drive rack 9 to form a linear motion of the drive rack 9.

FIG. 7 is a plan view of this embodiment, and FIG. 8 is a side view of FIG. 7, showing a cassette tape attaching / detaching position.

In the figure, 21 is an upper switch, 22 is a lower switch, and a wiring board with both motors 11 mounted on the left base 3
It is attached to 23 with the wiring process.

Reference numeral 24 denotes an upper switch lever, and reference numeral 25 denotes a lower switch lever. Support shaft portions 24a and 25a formed in the respective central portions can be rotated by U-shaped receiving portions 3c formed on the side surface of the left base 3, respectively. It is equipped with.

Further, pressing portions 24b and 25b for pressing the upper switch 21 and the lower switch 22 are formed at one end of the upper switch lever 24 and the lower switch lever 25, respectively, and the convex portions 24c and 25c are formed.
However, prior to the upper switch 21 and the lower switch 22, the switch pieces 21a and 22a are configured not to be pushed more than a certain amount. The upper switch 21, the lower switch 22, the upper switch lever 24, and the lower switch lever 25 have substantially the same planar shape. In FIG. 7, the upper switch 21 and the upper switch 21 are described in order to explain the movement of the lower switch lever 25. Switch lever
24 is removed.

In the figure, a projection 25d provided at the other end of the switch lever 25
Is pressed by a convex portion 4f formed on the rear side surface of the tray 4, the switch lever 25 is turned around the support portion 25a in the direction of arrow A, and the lower switch 22 is pressed and turned on. .

Reference numeral 26 denotes a switch lever spring, both ends of which are supported by L-shaped portions 3d and 3e formed on the left base 3, and pressing fins 26a formed at the top and bottom are always provided with the upper switch lever 24 and the lower switch lever 25. The upper switch lever 24 and the lower switch lever 25 are respectively turned in the direction of arrow B by pushing the convex portions 24e and 25e formed at positions slightly away from the switch from the center of the support shaft, and the switch lever spring 26 is operated by the upper and lower switches. The levers 24 and 25 are housed between the left base 3 and the support shafts 24a and 25a so as not to come off from the U-shaped receiving portion 3c. At this time, a slight gap 3c 'occurs between the bottom of the U-shaped receiving portion 3c and the shaft portions 24a and 25a,
When the pressing fins 26a are bent and the pressing portions 24b and 25b can further press the switch pieces 21a and 22a, the convex portions 24c and 2b are pressed.
5c abuts against the switches 21 and 22, and the rotation of the switch levers 24 and 25 in the direction of arrow A is stopped.

FIG. 9 shows that the tray 4 is slightly driven by the motor 11 in the direction indicated by the arrow C to release the protrusion 25d of the lower switch lever 25 from the protrusion 4f of the tray 4.
Is turned in the direction of the arrow B by the force of the switch lever spring 26, the lower switch 22 is turned off, and the pressing portion 25 of the lower switch lever 25 is released from the switch piece 22a, and the gap 3c '
Is configured to be 0.

FIG. 10 shows that when the tray 4 is further driven in the direction of arrow C and comes to the tray storage position, the convex portion 4f is almost at the center of the tray 4.
Upper switch lever by convex part 4g formed above
The protrusion 24d of the switch 24 is pushed, the upper switch lever 24 is rotated in the direction of arrow a, and the upper switch 21 is turned on. In this state, the state shown in FIG. Tray 4 hits another stopper and completes horizontal movement.
Although stopped at the tray storage position, only the drive rack 9 is further driven in the direction of arrow C in order to mount the cassette on the tape playing mechanism. When the cassette is mounted, the center side of the drive rack 9 as shown in FIG. Is configured to push the convex portion 25d of the lower switch lever 25 to rotate in the direction of arrow A to turn on the lower switch 22.

As described above, the upper switch 21 is turned ON only when pressed by the protrusion 4g of the tray 4, and the lower switch 22 is turned ON only when pressed by the protrusion 4f of the tray 4 or the protrusion 9e of the drive rack 9, When not pressed, the switch is turned off as shown in FIG.

The operation of the above configuration will be described. If the cassette tape 5 is placed on the cassette receiving plate 6 and an insertion command is issued from the cassette attaching / detaching position shown in FIGS. 1 and 2, the motor 11 rotates clockwise, and the drive gear 13 rotates counterclockwise. The drive rack 9 is driven leftward in the figure. As described above, since the drive rack 9 is fixed in the tray by the lock lever 10, the tray 4 is also pulled to the left. When the tray 4 moves horizontally, the connecting lever 8 meshing with the rack 2a of the right base 2 rotates clockwise on the shaft 4c of the tray 4. When the connecting lever 8 rotates, the one end 8b moves the slide plate 7 further to the left. At that time, the cassette receiving plate 6 rotatably connected to the slide plate 7 also moves while being guided by the groove 4a of the tray 4. The groove 4a of the tray 4 is upwardly inclined to the right as shown in the figure, so that it is easy to place the cassette obliquely when placing the cassette, but as it moves to the left, the cassette becomes horizontal and can be configured without taking up space. .

Just before the horizontal movement is completed, the lock lever 10
The result is as shown in FIG. One end 10b of lock lever 10
Abuts against the wall 3a of the left base 3, and when the tray 4d further moves to the left, the tray 4d turns clockwise against the spring 11 to be in the state of FIG. 3 (b). Then, the lock at the one end 10a of the lock lever 10 is released and the drive rack 9 moves horizontally to the left in the figure. At this time, the tray hits another stopper and completes the horizontal movement.

FIG. 4 is a side view at the time when the horizontal movement of the tray is completed, and FIG. 5 is a state where the cassette is mounted on the tape playing mechanism. 3 (a) corresponds to FIG. 4, and FIG. 3 (b) corresponds to FIG. In FIG. 4, the groove 4a of the tray is in an open state, and one end 6a of the cassette receiving plate 6 is disengaged from the groove, so that the cassette receiving plate 6 is rotatable. When the drive rack 9 moves further to the left in FIG. 4 from the state shown in FIG.
Along the cam portion 9a of the drive rack, the cassette receiving plate 6
Rotates clockwise around the shaft 6b. The tape playing mechanism 1 is composed of a right base 2 and a left base 3 as shown in FIG.
When the cassette tape 5 and the cassette receiving plate 6 rotate, the cassette tape 5 is mounted on the tape playing mechanism 1 as shown in FIG. FIG. 6 is a plan view of the mounted state.

Further, as shown in FIG. 5, the tape playing mechanism 1 is installed at an angle, so that the tape cassette 5 can be easily confirmed by providing a window 20 on the front surface of the housing.

Conversely, when a command to eject from the mounted state is issued, if the motor 11 rotates in the counterclockwise direction opposite to that at the time of mounting, the state shown in FIG. 1), and sequentially moves to the state shown in FIG.

7 and 8, the lower switch 22 is turned on by the convex portion 4f of the tray 4, and the upper switch is turned on.
21 is off.

The tray 4 is driven by the motor 11 in the direction indicated by the arrow C. When the tray 4 is moving as shown in FIG.
21 and the lower switch 22 are both turned off.

Next, as shown in FIG. 10, when the tray 4 is driven in the direction of arrow C to reach the tray storage position, the upper switch 21 is turned ON by the projection 4g of the tray 4. At this time, the lower switch 22 remains OFF.

In this state, the tray 4 hits another stopper and stops, and the upper switch 21 remains ON.

Next, as shown in FIG. 11, in order to mount the cassette on the tape playing mechanism, when only the drive rack 9 is driven in the direction of arrow C, the lower switch 22 is turned ON by the convex portion 9e at the center of the drive rack 9, and The performance of the cassette tape starts. At this time, both the upper and lower switches are ON.

When the performance is completed, the drive rack 9 is driven in the direction of arrow D, the lower switch 22 is turned off, and when the cassette is released from the tape playing mechanism, only the upper switch 21 is turned on as shown in FIG. Become.

Next, in this state, both the tray 4 and the drive rack 9 are driven in the directions indicated by arrows D, and both the upper switch 21 and the lower switch 22 are turned off as shown in FIG.

Further, when the tray 4 is driven in the direction of arrow D together with the drive rack 9 and returns to the cassette tape attaching / detaching position as shown in FIGS. 7 and 8, only the lower switch 22 is turned ON, and the tray 4
Is stopped in the direction of arrow D.

As described above, four types of detection distinction are performed by the two switches, that is, the states of the upper switch 21 and the lower switch 22 are OFF, ON-O.
FF, OFF-ON, OFF-ON, ON, when detecting that the tray 4 is in the storage position as shown in Fig. 10, and when loading the cassette to the tape playing mechanism and when releasing the loading Voltage can be controlled to reduce the mechanical noise and the impact noise by changing the speed of the motor.

Further, the switch levers 24 and 25 are rotated and returned in the direction of arrow B by the switch lever spring 26, and the switches 21 and 22 are surely turned off.
It can be held so that it does not come off.

When the protrusions 24d and 25d are pressed more than necessary due to dimensional variations, the fin 26a for pressing the switch lever spring 26 is pressed.
However, it is configured so as to further deflect and absorb the dimensional variation and not to increase the operation load of the tray 4 and the drive rack 9.

Effect of the Invention As described above, the present invention provides a tape playing mechanism, a tray for horizontally moving from a cassette attaching / detaching position to a tape playing mechanism mounting position, a cassette receiving plate guided horizontally movably in the tray, A coupling mechanism that engages with the tray and associates each stroke, a drive rack for driving the coupling mechanism, and a motor switch that is turned on and off by moving the tray and the drive rack.
A switch lever to be pressed, and a switch lever spring for pressing a fulcrum of the switch lever supported by the U-shaped receiving portion 3C such that the support shaft of the switch lever is movable by a fixed amount, and the tray and the drive rack are provided. When the pressing amount of the switch lever is large, the switch lever spring is deformed, and the variation of the pressing amount can be absorbed.

Further, the switch lever can be held between the base and the base by a switch lever spring so that the support shaft of the switch lever does not separate from the base.

In addition, by forming the tip of the convex portion provided at the center of the shaft portion of the switch lever at a position slightly away from the switch, the switch lever spring presses this, and the switch lever pivots and returns in the direction away from the switch. Can be.

Further, the two switches and the projections provided on the tray and the drive rack make it possible to distinguish between the cassette mounting / dismounting position, the storage position, the cassette mounting performance position, and whether the tray and the drive rack are passing.

Further, by detecting the storage position of the tray, the speed of the drive rack between the storage position and the playing position can be controlled to reduce mechanical noise and impact.

[Brief description of the drawings]

FIG. 1 is a side view of a cassette loading / unloading position of a cassette loading mechanism according to a first embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a detailed view of the lock lever, and FIG. FIG. 5 is a side view of the cassette mounting position, FIG. 6 is a plan view of the same, FIG. 7 and FIG. 8 are cassette attachment / detachment positions showing the relationship between switches and switch levers, trays, and racks. FIG. 9 is a plan view showing the switch and the switch lever when the tray is passing, FIG. 10 is a plan view showing the relationship between the switch and the switch lever when the tray is in the storage position, and FIG. The figure is a plan view showing the relationship between the switch and the switch lever when the tray and rack are at the cassette mounting performance position.
The figure is a plan view of a conventional example. 1 tape playing mechanism, 2 right base, 3 left base, 4 tray, 5 cassette tape, 6 cassette receiving plate, 7 slide plate, 8 connecting lever ,
9 ... drive rack, 10 ... lock lever, 11 ... motor, 12 ... pulley gear, 13 ... drive gear, 14 ... belt, 15 ... magnetic head, 16 ... spring, 17 ... housing, 18 ...
... Label, 19 ... Operation button, 21 ... Down switch, 22 ... Up switch, 23 ... Wiring board, 24 ... Up switch lever,
25: Lower switch lever, 26: Switch lever spring.

Claims (5)

(57) [Claims] A tape playing mechanism; a tray for horizontally moving from a cassette mounting / dismounting position to a tape playing mechanism mounting position; a cassette receiving plate guided in the tray so as to be able to move horizontally; A coupling mechanism for associating the respective strokes, a driving rack for driving the coupling mechanism, a switch lever for turning on and off the motor by moving the tray and the driving rack, and a U-shaped receiving portion 3C. A switch lever spring that presses a fulcrum of the switch lever that is supported by a support shaft portion of the switch lever so as to be movable by a predetermined amount. Cassette loading characterized in that the spring is deformed to absorb the variation of the pushing amount Structure. 2. The cassette loading device according to claim 1, wherein the switch lever is held between the base and the base by a switch lever spring so that the support shaft of the switch lever does not separate from the base. mechanism. 3. The switch lever spring presses by forming the tip of the convex portion provided at the center of the support shaft portion of the switch lever at a position slightly away from the switch, and the switch lever pivots and returns in the direction away from the switch. 3. The cassette loading mechanism according to claim 1, wherein the cassette loading mechanism is configured as described above. 4. A tray guided by a base and movable in a horizontal direction, a drive rack guided by a tray 4 and movable in a horizontal direction with respect to the tray, and a lock lever pivotally supported by the tray. When the drive rack driven by the drive gear moves horizontally together with the tray, it is configured to distinguish between when the tray is stopped and only the drive rack moves, and two switches, a tray, and a drive rack are provided. A cassette loading mechanism characterized in that a convex portion is used to distinguish a cassette mounting / dismounting position, a storage position, a cassette mounting / playing position, and whether a tray and a drive rack are passing. 5. A projection 4g formed before and after the side of the tray,
And 4f, the two upper switch levers and the lower switch levers are arranged to be driven, and when the tray is driven to the storage position, the convex portion is formed on a U-shaped receiving portion formed on the side surface of the base. One of the one switch levers supported by the shaft
By pressing one end, the other end of the switch lever pushes one switch disposed on the opposite side of the support shaft to detect the storage position of the tray, and the tray is stopped at the storage position and the tray is stopped. The convex portion formed on the side surface of the driven rack to be guided and driven pushes one end of the other switch lever, and the other switch disposed on the opposite side of the support shaft is connected to the other switch lever by the other end. By pressing, the playing position is detected, and the combination of ON and OFF of the two switches at the storing position and the playing position can be distinguished, and the speed of the drive rack from the storing position to the playing position can be determined. A cassette loading mechanism characterized in that it is controlled to reduce mechanical noise and impact.