JP2537006Y2 - Disk cassette - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cassette in which a head insertion hole provided in a cassette housing rotatably housing a disk as a recording medium for recording analog and digital signals is opened and closed by a shutter. In particular, when the shutter is mounted on the cassette housing, the shutter can be easily mounted without shaving or damaging the half with the guide claw provided on the shutter.

[0002]

2. Description of the Related Art As shown in FIG. 5, a shutter mounting portion 10 of a cassette housing 102 which rotatably accommodates a disk 101 as a signal recording medium as a disk cassette.
The shutter guide groove 1 is formed on the outer surface of the shutter mounting groove 103 along the end surface 104 of the shutter mounting portion 103 on the shutter insertion side.
05, a shutter spring guide projection (not shown) is provided on the inner surface of the shutter mounting portion 103 at a position corresponding to the shutter guide groove 105. When the cassette housing 102 is inserted into the body 102, in other words, the cassette housing 102 is
When inserted into the shutter 06, the guide claws 107 and 108 provided on the shutter 106 abut against the guide claw contact portions 109 and 110 provided on the end face 104 on the shutter insertion side, and press these guide claw contact portions 109 and 110. Then, it is known that the shutter 106 is moved to the position of the shutter guide groove 105 while being bent, and is fitted in the shutter guide groove 105 so that the shutter 106 is assembled to the cassette housing 102.

Reference numeral 111 denotes a shutter spring. The shutter spring 111 is inserted into the cassette housing 102 from the end face 104 on the shutter insertion side.
One end 112 is locked to the cassette housing 102 and the other end 1
13 is slid along one side surface of the spring guide protrusion (not shown), and is locked by a spring locking portion 114 provided on the shutter 106, so that the shutter 106 is moved by the spring force. Of the head insertion hole 1 with the shutter 106.
16 and the like are kept closed.

[0004]

By the way, in the conventional disk cassette, as described above, the shutter 106 is used.
The guide claws 107 and 108 are moved to the position of the shutter guide groove 105 while the guide claws 107 and 108 provided on the shutter insertion side end surface 104 are pressed and deformed, that is, bent, by the guide claws 107 and 108 provided on the shutter. Since the shutter 106 is fitted into the shutter guide groove 105 and the shutter 106 is mounted on the cassette housing 102, the following problem arises.

(1) The guide claw contact portions 109 and 110 of the cassette housing 102 are unlikely to bend (particularly, the portion where the shutter spring guide projection is provided on the inner surface of the lower half 104 is hard to bend). It is difficult to assemble to the body, and the workability of assembling the shutter is poor.

(2) If the guide claw contact portions 109 and 110 of the cassette housing 102 are not easily bent,
7 and 108, the height H is made as low as
Although it is conceivable to reduce the degree to which the tips of the tips 7 and 108 fit into the shutter guide groove 105, in this case, the guide claws 107 and 108 are
5 from the cassette housing 102 and the shutter 1
06 easily falls off.

The present invention is to solve the above-mentioned conventional problems by easily bending the above-mentioned guide claw contact portion provided with a projection for a spring guide which is particularly hard to bend.

[0008]

SUMMARY OF THE INVENTION On the outer surface of a shutter mounting portion of a cassette housing which rotatably accommodates a disk ,
A disk cassette in which a shutter guide groove is provided along the end face of the shutter mounting portion on the side where the shutter is inserted, and a shutter spring guide projection is provided at a position corresponding to the shutter guide groove on the inner surface of the shutter mounting portion. And a slit penetrating from the bottom surface of the shutter guide groove to the spring guide surface of the shutter spring guide protrusion.

[0009]

With the slit penetrating from the bottom surface of the shutter guide groove to the spring guide surface of the shutter spring guide protrusion provided on the back side thereof, the portion provided with the shutter spring guide protrusion is relatively easily bent, whereby the shutter can be moved. It can be easily inserted.

[0010]

1 to 4 show a disk cassette according to the present invention.
This will be described with reference to FIG.

Reference numeral 1 denotes a disk cassette of the present invention, which includes a disk 2 as a recording medium, a cassette housing 3 that rotatably stores the disk 2, and an end surface 4 of the cassette housing 3 on the shutter insertion side. And the end face 4 of the shutter mounting portion 5 on the shutter insertion side.
By fitting guide claws 7 and 8 into a shutter guide groove 6 formed along the direction of the arrow, a shutter 9 slidably attached to the cassette housing 3 and the shutter 9 A shutter spring 12 is pressed against one side portion 10 of the portion 5 to maintain a head insertion hole 11 provided in the cassette housing 3 in a closed state.

The disk 2 is constructed by attaching a hub 22 made of magnetic metal to the center of a disk body 21 made of a synthetic resin sheet.

A signal recording surface is formed on the lower surface of the disk main body 21, and is attached to a spindle of a disk drive by the hub 22.

The cassette housing 3 is made of a synthetic resin having an appropriate elasticity such as ABS resin, and the lower halves 31, 32
Are overlapped.

A shutter guide groove 6 is provided on the outer surface of the lower half 32, and a shutter spring guide projection 33 is provided on the inner surface. (See FIG. 2).

The shutter spring guide projection 33 is provided at one end in the length direction of the shutter guide groove 6 so as to overlap with the shutter guide groove 6, that is, as shown in FIG. 34 and the spring guide surface 35 of the shutter spring guide projection 33
Are provided so as to be flush with each other in the upward and downward directions.

A slit 36 penetrating through the lower half 32 from the bottom surface on one end side of the shutter guide groove 6 to the spring guide surface 35 of the spring guide projection 33 is provided.

As shown in FIG. 1, a hub fitting hole 37 is provided at the center of the lower half 32, and extends toward the shutter guide groove 6 around the hub fitting hole 37. A rectangular head insertion hole 11 is provided.

On the other hand, a ring-shaped hub positioning projection (not shown) is provided at the center of the upper half 31, and a rectangular shape similar to the head insertion hole 38 is formed around the hub positioning projection. Pad insertion (not shown) is provided.

Then, the hub fitting hole 3 of the lower half 32 is formed.
7, the lower surface side of the hub 22 of the disc 2 is fitted.
The hub positioning projections of the upper half 31 are fitted on the upper surface side of the upper half 31 so that the upper and lower hubs 31
The cassette housing 3 is constituted by joining the two.

The shutter 9 is formed by bending a metal plate into a U-shaped cross section.

That is, the shutter 9 is a housing end surface overlapping piece 4 overlapping the shutter insertion side end surface 4 of the cassette housing 3.
And a pair of upper and lower portions overlapping the upper and lower surfaces of the cassette housing 3, that is, the upper and lower halves 31 and 32, at right and left ends of the overlapping portion 41 of the housing end surface overlapping piece. Are formed in a U-shaped cross-section by connecting the housing holding pieces 42 and 43 in series.

The pad insertion hole and the head insertion hole 11 are provided on one side of the pair of upper and lower housing casing pieces 42 and 43.
Notch windows 44 and 45 are respectively formed so as to overlap with each other, and the pair of guide claws 7 and 8 are provided at both ends near the overlapped piece 41 on the left and right sides of the lower case holding piece 43. It is cut and raised.

When the end face 4 of the cassette housing 3 on the shutter insertion side is inserted from the opening 46 facing the housing end face overlapping piece 41 of the shutter 9, the guide claws 7 and 8 of the shutter 9 are The guide nail contact portions 47 and 48 come into contact with each other, and these guide nail contact portions 47 and 48 are
Press to the side.

The guide pawls 7 and 8 serve as guide pawl contact portions 47 and 4.
When the shutter 8 is pressed, the portion provided with the shutter spring guide projection 33, which has been hardly bent in the past, is easily bent due to the presence of the slit 36, and the guide claws 7, 8 smoothly move to the position of the shutter guide groove 6, The shutter 6 is fitted into the shutter guide groove 6 and
Is slidably mounted on the shutter mounting portion 4.

A so-called torsion coil spring is used for the shutter spring 12, and both ends of the spring 11 are bent at substantially right angles in opposite directions to each other as shown in FIG. A housing engaging portion 51 and a shutter engaging portion 52 are provided.

Then, as described above, the cassette casing 3
After the shutter 9 is mounted on the shutter 1, as shown in FIG. 4, the spring 1 is inserted through a gap 53 between the upper and lower halves 31 and 32 provided on the end face 4 of the cassette housing 3 on the shutter mounting side.
2 is inserted, and the cassette housing engaging portion 51 at one end of the spring 12 is provided in the lower half 32.
4 and the shutter engaging portion 52 on the other end side is slid while sliding along the spring guide surface 35 of the shutter spring guide projection 33 to cut and raise the shutter engaging portion 52 on the shutter 9. Locking to the spring locking portion 55 allows the shutter spring 12
, The shutter 9 is repelled, and the shutter 6 is pressed against one side 10 of the shutter mounting portion 5 provided on the cassette housing 3 to maintain the shutter 9 in a so-called closed state.

When the shutter 9 is slid against the spring force of the shutter spring 12, the shutter engaging portion 52 at one end of the shutter spring 12 slides the projection 33 provided on the inner surface of the lower half 32. Moving along the guide surface 35, the shutter spring 12 is bent in a U-shape.

When the shutter 9 is pressed against the other side of the shutter mounting portion 5, the shutter 9
The notch windows 44 and 45 provided on the pad overlap the pad insertion hole and the head insertion hole, respectively, so that the pad insertion hole and the head insertion hole are opened.

In the embodiment shown in the figure, a long hole 61 penetrating through the inner surface of the lower half 32 is provided on the bottom surface opposite to one end of the shutter guide groove 6 provided with the slit 36. 61 also allows the guide claw contact portion 48 of the cassette housing 3 to be easily bent.

[0031]

According to the present invention, there is provided a disk cassette having the above-described structure, in which a shutter spring is provided from a bottom surface of a shutter guide groove provided on an outer surface of the cassette housing to an inner surface of the cassette housing. Since the slit penetrating through the spring guide surface of the guide projection is provided, the following effects are obtained.

(1) At the portion where the shutter spring guide projection is provided, the guide claw abutment portion is easily bent by the slit, and the work of inserting (assembling) the shutter is facilitated.

(2) The guide claw may be easily bent so that the guide claw abutment portion is easily bent, so that the shutter does not easily fall off the cassette housing.

[Brief description of the drawings]

FIG. 1 is a perspective view of a state where a cassette housing and a shutter are separated.

FIG. 2 is a perspective view of a state where a shutter is attached to a cassette housing.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a perspective view of a main part.

FIG. 5 is a perspective view of a conventional example.

[Description of Signs] 1 ... Disc cassette, 2 ... Disk, 3 ... Cassette housing, 4 ... End face on shutter insertion side, 5 ... Shutter mounting part,
6: shutter guide groove, 33: shutter spring guide projection, 36: slit.

Claims (1)

(57) [Scope of request for utility model registration] A shutter guide groove is provided on an outer surface of a shutter mounting portion of a cassette housing which rotatably accommodates a disk , along a shutter insertion side end surface of the shutter mounting portion. In a disk cassette provided with a shutter spring guide protrusion at a position corresponding to the shutter guide groove on the inner surface of the shutter mounting portion, a slit is provided to penetrate from a bottom surface of the shutter guide groove to a spring guide surface of the shutter spring guide protrusion. Disc cassette characterized by the above-mentioned.