JPH0734528Y2 - Disk cassette mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in the following order.

A. Industrial fields of use B. Overview of the device C. Conventional technology D. Problems to be solved by the device E. Means for solving the problem F. Action G. Example G ₁ ． Configuration of the embodiment G ₂ . Operation and operation of the embodiment H. Effect of the invention A. Industrial field of application The present invention relates to a disk cassette mounting device, and more particularly to a disk cassette mounting device with a reduced spring material.

B. Outline of the Invention The present invention has a cassette holder into which a disc cassette is inserted, and an eject plate interposed between the cassette holder and a chassis and slidable in the insertion / ejection direction of the disc cassette. Of the disc cassette that pivotally supports the engaging portion protruding from the lower surface of the eject plate and the lock lever that engages when the eject plate is in the eject position to lock the eject plate on the chassis side. In the mounting device, a spring for urging the eject plate in the cassette ejection direction and for rotatively urging the lock lever in the direction of engaging the engaging portion is provided at one end of the lock lever and the eject plate. By installing the cable between the two, it is possible to reduce the number of parts and improve the ease of assembly.

C. Conventional Technology Conventionally, as a mounting device for this type of disc cassette,
The one described in Japanese Utility Model Publication No. 61-52358 is known.

First, the disc cassette installed in the mounting device will be described. This disc cassette 1 is shown in FIGS.
As shown in the figure, a sheet-shaped magnetic disk 3 is rotatably housed in a case 2 composed of upper and lower halves 2a and 2b. At the center of the magnetic disk 3, a central circle made of a metal plate is formed. The plate 4 is fixed, and the center hole 5 and the drive pin insertion hole 6 are provided at the center of the center disk 4 and a position eccentric from the center.
And are provided. The center hole 5 is formed in a square shape, the drive pin insertion hole 6 is formed in a rectangular shape, and the center disk 4 is loosely fitted in the turntable insertion hole 7 provided in the central portion of the lower half 2b. Has been installed on the magnetic disk 3
The head insertion holes 8 provided in the upper and lower halves 2a and 2b are configured to be opened and closed by a shutter 9 along the radial direction. Positioning pin engagement holes 10, 10 are provided on both sides of the shutter 9 on the plane of the lower half 2b of the disc cassette 2.

A disc cassette mounting apparatus for mounting and operating the disc cassette 1 thus configured in a disc player is arranged on a turntable 12 mounted via a chassis 11 as shown in FIG. . A center pin 13 and a drive pin 14 are provided on the turntable 12 at a center and a position eccentric from the center, and when the disc cassette 1 is mounted and mounted, the center pin 13 and the drive pin 14 are Is the central hole 5 of the central disk 4 and the drive pin insertion hole 6
, And the magnetic disk 3 is rotated.

And, the disk cassette mounting device according to the present invention is
A pair of side plates 15 and 15 which are mounted in parallel on opposite sides of a chassis 11 to which a magnetic head and a feeder for this magnetic head are mounted and which are members on the chassis side, and these side plates 1.
The ejector plates 5 and 15 are slidably mounted on the chassis 11, and a cassette holder 17 having an insertion gap for the disc cassette 1 on the eject plate 16.

The side plates 15 and 15 are attached to the chassis 11 by means of screws 19 via attachment tongues 18 that are bent and projected at appropriate positions. Inside the side plates 5 and 15, the cassette holder
Guide pieces (23) provided with slide guide grooves (22) with which guide pins (20, 21) protruding from both sides of the rear side of 17 are engaged.

The eject plate 16 has a long hole 24 formed in pairs on both sides.
Are inserted into the four support pins 25 set up on the chassis 11 and slidably attached to the chassis 11 within the range of the elongated holes 24. At the center of the eject plate 16, there is formed a notch recess 26 whose rear side is open so that the turntable 12 can be exposed. On both sides of the eject plate 16, a cassette holder 17 mounted on the eject plate 16 is supported at a floating position at the time of eject and when the disc cassette 1 can be inserted, and the disc cassette 1 is pressed and held. An inclined cam surface 27 for operating the above cassette holder 17 to float.
A pair of cam plates 27, 28, 28, 30 on which a, 28a, 30a are formed are formed upright. Further, the eject plate 16 is biased toward the front side in the direction of arrow A in FIG. 10 by a spring 31 stretched between one side of the eject plate 16 and one side plate 15. Further, an operation button attachment portion 33 to which the ejection operation button 32 is attached is bent and formed on one side of the front surface side of the eject plate 16. As described above, on the lower surface of the rear side of the eject plate 16 slidably mounted on the chassis 11 and biased by the spring 31, the lock pin 36 fitted with the roller 35 is provided so as to project downward. There is. When the eject plate 16 is in the eject position, the lock pin 36 pivots the pivotal support portion 39 to a pivot 38 that is erected on a mounting piece 37 that is bent from one of the side plates 15 and is continuous. By engaging with a lock lever (40) that is rotatably supported, the eject plate (16) is locked against the spring (31) against the spring (31) at the eject position. The lock lever 40 is wound around the pivot 39, and one end of the lock lever 40 is
The torsion coil spring 41 is engaged with the other end of the mounting plate 37, and the other end of the mounting plate 37 is pivoted in the clockwise direction in the figure. A rotation operation pin 42, which is pressed by one end of the disk cassette 1 to be inserted, is set up in the middle of the lock lever 40.

Further, the cassette holder 17 is formed in a rectangular flat plate shape having substantially the same size as the flat surface of the disc cassette 1.
On both sides, slide guide portions 45, 45 having a U-shaped cross section are bent and formed so as to support and guide both sides of the disk cassette 1 to be inserted. On the outer sides of both sides of the cassette holder 17, front guide pins 46, 47 are provided in a protruding manner together with the rear guide pins 20, 21 described above. These guide pins 20, 21, 46, 47 connect the cassette holder 17 to the eject plate 1
Cam plate 2 provided on this eject plate 16 when mounted on 6
It is installed so as to correspond to 7,28,29,30 respectively. Further, on one side of the cassette holder 17, protrusions 48 and 49 for pressing the disc cassette 1 are formed so as to bulge toward the lower surface side. Further, an inclined guide surface 50 for guiding the inserted disc cassette 1 is formed on the front edge side.
And this cassette holder 17 is a guide pin on the inner side.
20 and 21 are engaged with the guide grooves 22 and 22 of the guide pieces 23 and 23, respectively, and the guide pins 20, 21 and 46 and 47 are respectively placed on the cam plates 27, 28, 29 and 30 of the eject plate 16. In this way, the eject plate 16 is arranged. In this way, crimp springs 51 and 52 are respectively stretched between the cassette holder 17 and the side plates 15 and 15 arranged on the eject plate 16, and the cassette holder 17 is constantly urged toward the chassis 11 side. . It should be noted that the guide pins 46, 21 of the cassette holder 17 placed on the one of the rear side and the one of the front side cam plates 30, 27 of the eject plate 16 are prevented from coming off. L-shaped guide pin retaining pieces 53,5
3 is planted from the above-mentioned eject board 16. And
The space between the cassette holder 17 and the eject plate 16 is a mounting portion for the disc cassette 1, and the front side is the disc cassette 1.
It is used as the insertion / removal opening 55.

On the cassette holder 17 mounted on the eject plate 16 as described above, the disc cassette 1 mounted here is mounted.
An L-shaped shutter opening / closing lever 56 for opening / closing the shutter 9 of the disc cassette 1 which is a rotating member that rotates in a direction horizontal to the plane of FIG. The shutter opening / closing lever 56 is attached by pivotally supporting the base end portion on a pivot pin 57 that is erected in the cassette holder 17, and projects from the lower surface of the tip side to the lower surface of the cassette holder 17 to the front edge side of the disc cassette 1. Formed step 1a
A pressing pin 58 that engages with and contacts one side of the shutter 9 is projected. A rotation urging spring 59 is stretched between the cassette holder 17 and the shutter opening / closing lever 56, and the shutter opening / closing lever 56 is urged to rotate clockwise in the direction of arrow C in FIG. There is. The cassette holder 17
A guide wall 60 having an arc shape in which the shutter opening / closing lever 56 rotates is formed so as to rise along the path along which the tip of the shutter opening / closing lever 56 rotates.

Further, on one side of the cassette holder 17 facing the tip side of the shutter opening / closing lever 56, a cassette pressing arm 61 made of synthetic resin or the like having elastic force is rotatably supported. As shown in FIG. 9, the cassette pressing arm 61 is provided with cassette pressing pins 62, 62 projecting from the lower surfaces of both ends, respectively, and is fitted to a support pin 63 set up in the cassette holder 17 at a substantially central portion. A supporting portion 64 is provided, and a pressed portion 66 pressed by a pressing piece 65 formed upright on one end side of the shutter opening / closing lever 56 is projectingly provided on one end side, and the disc cassette 1 is provided on the other end side. A pressing portion 67 that presses and supports one side is provided so as to hang down.

Then, the cassette pressing arm 61 includes the cassette pressing pin 6
2, 62 face the through holes 68, 68 formed in the cassette holder 17, the pressing portion 67 faces the notched window portion 69 formed in the side portion of the cassette holder 17, and slightly supports the support pin 63. A pivot 64 is pivoted to have clearance.

When the cassette holder 17 is in the ejected state in which the cassette holder 17 floats, the cassette pressing arm 61 attached in this way
As shown in FIG. 10, the pressing piece 65 of the shutter opening / closing lever 56 presses the pressed portion 65, and the pressing portion 67 causes the cassette holder 17 to move.
It has been rotated so that it has penetrated inward. Further, since the cassette pressing arm 61 only rotates within the range of the through holes 68, 68 exposed by the cassette pressing pins 62, 62, the rotation position of the shutter opening / closing lever 56 is restricted. The shutter opening / closing lever 56 is placed at a position where the pressing pin 58 contacts one side of the shutter 9 in the closed state of the disc cassette 1 when the rotation is restricted by the cassette pressing arm 61.

In the chassis 11, the positioning pins 69, 69 that engage with the positioning pin engagement holes 10, 10 of the disc cassette 1 mounted on the turntable 12 and the support pins 70 that abut the flat surface of the case 2 of the disc cassette 1. , 70 have been planted.

In order to insert the disc cassette into the disc cassette mounting device configured as described above and mount the disc cassette on the turntable 12, the cassette holder 17 is in an ejected state. Then, the disc cassette 1 is inserted from the shutter 9 through the insertion / removal opening 55. When the disc cassette 1 is partially inserted, the pressing pin 58 at the tip of the shutter opening / closing lever 56 engages with the step portion 1a on one side of the shutter 9 and abuts on one side of the shutter 9. Here, when the disc cassette 1 is further inserted, the shutter opening / closing lever 56 is rotated counterclockwise against the urging force of the rotation urging spring 59 as shown in FIG. The shutter 9 is slid to open the head insertion hole 8. Further, the eject plate 16 is locked at the eject position. The rotation operation pin 42 of the lock lever 40 is pressed by one end of the disc cassette 1, and the lock lever 40 is rotated counterclockwise against the biasing force of the torsion coil spring 41. When the lock lever 40 is rotated, the lock pin 36
The lock plate is released and comes into contact with the tip edge of the lock lever 40, and the eject plate 16 is slid forward by the spring 31 in the direction of arrow A in FIG. When the eject plate 16 is slid forward, the cam plates 27, 2
Cassette holder 17 placed on the horizontal plane of 8,29,30
The guide pins 20, 21, 46, 47 of the inclined cam surfaces 27a, 28a, 29a, 3
As it slides along 0a, the cassette holder 17 is lowered to the eject plate 16 side by the compression springs 51 and 52 as shown in FIG. Then, the upper surface side plane of the case 2 of the disc cassette 1 inserted up to the turntable 12 is projected.
48, 49 and cassette pressing pin 62 of cassette pressing arm 61
The disc cassette 2 by pressing with the positioning pin.
Crimp onto 69,69 and support pins 70,70. The shutter opening / closing lever 56 is separated from the cassette pressing arm 61, and the cassette pressing arm 61 is supported by the support pin 63 so as to have a clear lance. Crim by force. At this time, the magnetic disk 3 in the case 2 is the turntable.
It can be rotated in the case 2 while being mounted on the top 12. In order to eject the disc cassette 1 mounted as described above, the eject operation button 32 is pressed to slide the eject plate 16 inward against the biasing force of the spring 31, as shown in FIG. In cassette holder 17
Guide pins 20,21,46,47 are inclined cam surfaces 27a, 28a, 29a, 30a
It slides up and is levitated on the horizontal plane of the cam plates 27, 28, 29, 30 and the cassette holder 17 is moved upward from the eject plate 16 against the biasing force of the pressure springs 51, 52 to move the disc cassette 1 to Release the crimp. When the eject plate 16 is slid inward as described above, the lock pin 36 engages with the lock lever 40 and is locked in the inward position against the biasing force of the spring 31. And cassette holder 17
When the disc cassette 1 is released from the pressure-bonded holding state, the shutter opening / closing lever 56 moves the rotation biasing spring 59.
The disk cassette 1 is rotated in the clockwise direction by the push-out means to push out the disc cassette 1 toward the insertion / removal opening 55, and the pressing piece 65 presses the pressed portion of the cassette pressing arm 61 to move the cassette pressing arm 61 in the arrow in FIG. Rotate clockwise in the D direction. When the cassette pressing arm 61 is rotated in the clockwise direction, the pressing portion 67 enters the cassette holder 17 through the notched window portion 69 of the cassette holder 17 and is pushed out by the shutter opening / closing lever 56 to move outward. The one side of the case 2 of the disk cassette 1 moving to is pressed to stop the movement, and a part of the disk cassette 1 projects from the insertion / removal opening 55 and is supported in a state in which the disk cassette 1 can be grasped. And prevent falling out.

D. Problem to be Solved by the Invention However, in such a conventional disc cassette mounting apparatus, a spring 31 for urging the eject plate 16 in the disc cassette ejecting direction and a torsion for urging the lock lever 40 are provided. Requires coil spring 41 and
There are problems that the number of parts is large, the assembly is complicated, and the cost is high.

The present invention has been made in view of such conventional problems, and aims at obtaining a disk cassette mounting device which can reduce the number of parts, improve the assemblability, and reduce the cost. To do.

E. Means for Solving the Problems Therefore, the present invention provides a cassette holder into which a disc cassette is inserted, and an ejector which is interposed between the cassette holder and a chassis and which is slidable in the insertion / ejection direction of the disc cassette. A locking lever that locks the eject plate by engaging the protruding part on the lower surface of the eject plate and locking the eject plate when the eject plate is in the eject position. In the mounting device for the axially supported disc cassette, a spring that biases the eject plate in the cassette ejection direction and pivotally biases the lock lever in the direction in which the lock lever is engaged with the engaging portion is provided at one end of the lock lever. The means for solving the problem is that it is stretched between the portion and the eject plate.

F. Action A spring stretched between the eject plate and one end of the lock lever urges the lock lever in the direction of engaging the engaging part protruding from the lower surface of the eject plate, and at the same time, ejects the eject plate of the disc cassette. Energize in the discharge direction. Therefore, it is not necessary to provide the eject plate and the lock lever with the spring having the above-mentioned action.

G. Embodiment Hereinafter, a mounting apparatus for a disc cassette according to the present invention will be described based on an embodiment shown in the drawings. The same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

G ₁ . Configuration of Embodiment FIG. 1 to FIG. 6 show an embodiment of the present invention.

In this embodiment, as shown in FIG. 1 and FIG.
A substantially L-shaped shutter opening / closing lever 56 is provided on the upper surface of the cassette holder 17 with one end pivotally supported. On the lower surface of the other end of the shutter opening / closing lever 56, a pressing pin 58 protruding downward is planted. An arcuate guide hole 17a is cut out in the cassette holder 17 so that the pressing pin 58 can move in accordance with the pivot movement of the shutter opening / closing lever 56. Further, in the middle part of the shutter opening / closing lever 56,
Engagement piece 56a to which one end of a torsion coil spring described later engages
Has been stood up.

On the other hand, a notched window portion 69 is formed on the right front side of the cassette holder 17. The other end of a torsion coil spring, which will be described later, engages with the cutout window portion 69.

In the figure, reference numeral 71 denotes a torsion coil spring (torsion spring), one end 71a of which engages with an engagement piece 56a of the shutter opening / closing lever 56, the other end 71b of which is bent downward to engage with the cutout window portion 69. , The intermediate coil portion 71c is the cassette holder 1
It is held by the holding portion 17b on the upper surface of 7. This torsion coil spring 71 has a shutter opening / closing lever 56 at one end 71a.
Is urged in the clockwise direction, and the other end 71b is urged to face the inside of the cassette holder 17 through the cutout window portion 69. Incidentally, 17c in the figure indicates a protrusion for locking the other end side of the torsion coil spring 71.

Further, 72 in the figure is a spring stretched between the lock lever 40 and the eject plate 16. The lock lever 40 is
It has a substantially U-shaped curve, an intermediate portion is pivotally supported by a support shaft 38, and one end of the spring is locked to one end portion 38a. The other end side of the lock lever 40 is pivoted so that the lock pin 36 provided on the eject plate 16 is locked.
Can be engaged with.

The right rear portion of the eject plate 16 is extended to form a substantially L-shaped locking plate 16a, and the other end of the spring 72 is locked to the tip of the locking plate 16a. There is. In addition,
The spring 72 is set so as to constantly urge the locking plate 16a on the eject plate 16 side and the one end 40a of the lock lever 40.

G ₂ . Operation / Operation of Embodiment Next, the operation and operation of such a disk cassette mounting apparatus will be described.

With reference to FIG. 3 to FIG. 6, a case of inserting the disk cassette 1 into the cassette holder 17 of the disk cassette mounting apparatus configured as described above and a case of ejecting the mounted disk cassette 1 will be described. explain.

First, when the disc cassette 1 is inserted into the cassette holder 17 with the taper surface 2A positioned on the upper and lower sides in the drawing, the taper surface 2A abuts against the other end 71b of the torsion coil spring 71 and resists the biasing force of the torsion coil spring 71. The other end 71b is rotated in the counterclockwise direction so that the other end 71b moves to the outside of the cassette holder 17, so that the disc cassette 1 can be inserted into the cassette holder 17. Then, the pressing pin 58 of the shutter opening / closing lever 56 engages with the step portion 1a and abuts on the side end portion of the shutter 9. Disc cassette 1 in this state
When is further pressed, the shutter opening / closing lever 56 rotates counterclockwise against the urging force of the torsion coil spring 71 to open the shutter 9 and expose the magnetic disk 3 as shown in FIG. Then, the front end of the disc cassette 1 pushes the rotation operation pin 42 to rotate the lock lever 40 counterclockwise against the biasing force of the spring 72, and the lock lever 40 and the eject plate 16 are provided with a lock. The engagement with the pin 36 is released, and the eject plate 16 is
The urging force of 72 moves the disc cassette in the ejecting direction.
Therefore, the guide pins 20, 21, 46, and 47 are guided by the cam plates 27, 28, 29, 30 of the eject plate 16 and the guide grooves 22, 22.
And the disk cassette 1 is mounted and positioned in the state shown in FIG.

If the disc cassette 1 is inserted by mistake, the corner of the disc cassette 1 will be the other end 71b of the torsion coil spring 71.
Therefore, it is possible to prevent erroneous insertion of the disk cassette 1 and prevent damage to the magnetic head (not shown).

When the disc cassette 1 is ejected after the recording or reproduction is completed, the eject button 16 is pressed to cause the eject plate 16 to slide against the biasing force of the spring 72 and to be locked by the lock lever 40. And
The guide pins 20, 21, 46, and 47 are guided by the cam plates 27, 28, 29, 30 and rise against the biasing force of the compression springs 51, 52, so that the shutter is biased by the torsion coil spring 71. The open / close lever 56 rotates clockwise to eject the disc cassette 1 from the cassette holder 17, and the other end 71b of the torsion coil spring 71 presses the side face of the disc cassette 1. Therefore, the disc cassette 1 is supported by the cassette holder 17 in the state shown in FIGS. 4 and 6.
It is possible to prevent the disc cassette 1 from falling out of the cassette holder 17.

Although the embodiments have been described above, it is needless to say that the present invention can be applied to other types of mounting devices in which a lock lever is substantially provided on the chassis side, and various design changes can be made. .

H. Effect of the Invention As is clear from the above description, in the disc cassette mounting apparatus according to the present invention, the lock lever and the eject plate can be biased by a single spring, which reduces the number of parts. effective.

Therefore, there is an effect that the assemblability of the device is improved and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a disc cassette mounting apparatus according to the present invention, and FIG. 2 is a perspective view of the same assembled state,
FIG. 3 is a plan view showing a state where the disc cassette is mounted, FIG. 4 is a side view showing the same, FIG. 5 is a plan view showing an ejecting state of the disc cassette, FIG. 6 is a side view showing the disc cassette, and FIG. Is a perspective view of the disc cassette, FIG. 8 is a plan view of the disc cassette, FIG. 9 is an exploded perspective view of a conventional example, FIG. 10 is a perspective view of the conventional example, and FIG. 11 is a plan view showing a mounted state of the disc cassette. 12 is a side view of the same, FIG. 13 is a plan view showing an ejecting state of a conventional example, and FIG. 14 is a side view of the same. 11 ... Chassis, 15 ... Side plate, 16 ... Eject plate, 17 ... Cassette holder, 40 ... Lock lever, 40a ... One end part, 72 ... Spring.

Claims (1)

[Scope of utility model registration request] 1. A cassette holder into which a disc cassette is inserted, and an eject plate interposed between the cassette holder and a chassis and slidable in the inserting / discharging direction of the disc cassette. In a disc cassette mounting device in which an engaging portion protruding from the lower surface of the eject plate and a lock lever that locks the eject plate by engaging the eject plate when the eject plate is in the eject position is pivotally supported on the chassis side, A spring for biasing the eject plate in the cassette ejection direction and pivotally biasing the lock lever in the direction of engaging the engaging portion is stretched between one end of the lock lever and the eject plate. A disk cassette mounting device characterized by being installed.