JPH04101964U - disk cassette - Google Patents

Abstract

(57) [Summary] (with modifications) [Purpose] When attaching the shutter to the cassette case,
To easily insert (assemble) a shutter without scraping or damaging a cassette casing with a guide claw provided on the shutter. [Structure] A shutter guide groove 6 is provided on the outer surface of the shutter mounting portion 5 of the cassette housing 3 along the end surface 4 on the shutter insertion side of the shutter mounting portion 5.
A shutter spring guide protrusion is provided at a position corresponding to the shutter guide groove 6 on the inner surface of the shutter spring 12, and by sliding one end of the shutter spring 12 along the guide protrusion, the one end can be locked to the shutter 9. In the disk cassette 1, a slit 36 is provided that passes through from the bottom of the shutter guide groove 6 to the spring guide surface of the shutter spring guide protrusion.
The guide pawl abutting portion 47 of the cassette casing 3, which the cassette casing 3 abuts, is made to be easily bent.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention uses a rotating disk as a recording medium to record analog and digital signals. The head insertion hole provided in the cassette housing can be opened and closed using a shutter. Regarding disc cassettes that have been , the guide claw provided on the shutter can easily be used without scraping or damaging the half. This allows the shutter to be attached to the

0002

[Conventional technology]

A disk 1 as a signal recording medium as shown in FIG. 5 as a disk cassette. The outside of the shutter mounting part 103 of the cassette housing 102 that rotatably accommodates the On the side surface, there is a shape along the end surface 104 of the shutter mounting part 103 on the shutter insertion side. While the shutter guide groove 105 is provided in the above-mentioned state, the inner surface of the shutter mounting portion 103 is A shutter spring guide protrusion is provided at a position corresponding to the shutter guide groove 105. a shutter (not shown) is provided, and the shutter 106 is inserted from the end surface 104 side on the shutter insertion side. In other words, when the cassette housing 102 is inserted into the cassette housing 102, the cassette housing 102 is When inserted into the shutter 106 from the insertion side end surface 104 side, the shutter 106 The provided guide claws 107 and 108 are the guide claws provided on the end surface 104 on the shutter insertion side. The guide claw contacts the contact parts 109 and 110 and presses the guide claw contact parts 109 and 110. , while bending it, moves to the position of the shutter guide groove 105 and closes the shutter. The shutter 106 is assembled into the cassette housing 102 by fitting into the tag guide groove 105. It is known what made it possible to do so.

0003 Note that 111 is a shutter spring, and the shutter spring 111 is It is inserted into the cassette housing 102 from the end face 104 side on the shutter insertion side, and one end 112 to the cassette housing 102, and the other end 113 to the spring guide protrusion. The shutter 106 is provided by sliding it along one side of the shutter 106 (not shown). By locking the spring locking portion 114, the shutter 106 is moved by the spring force. to one side 115 of the shutter mounting part 103, and insert the head with the shutter 106. The inlet hole 116 and the like are maintained in a closed state.

0004

[Problem that the idea aims to solve]

By the way, in the conventional disk cassette, as mentioned above, the shutter 106 A guide provided on the end surface 104 on the shutter insertion side with guide claws 107 and 108 provided on the shutter insertion side. While pressing and deforming the pawl contact portions 109 and 110, that is, bending them, the guide pawls 107 and 1 08 to the position of the shutter guide groove 105, and 5 to attach the shutter 106 to the cassette housing 102. As a result, there were problems as described below.

[0005] (1) The guide claw contact parts 109 and 110 of the cassette housing 102 are difficult to bend (especially The part where the shutter spring guide protrusion is provided on the inner surface of the lower half 104 is bent. ), this makes it difficult to assemble the shutter into the cassette housing, making the shutter assembly work difficult. Bad sex.

[0006] (2) When the guide claw contact parts 109 and 110 of the cassette housing 102 are difficult to bend The height H of the guide claws 107, 108 is made as low as possible, and the height H of the guide claws 107, 108 is made as low as possible. It is also considered to reduce the degree to which the tip of 08 gets stuck in the shutter guide groove 105. However, in this case, the guide claws 107 and 108 are aligned with the shutter guide groove 10. 5, and the shutter 106 easily falls off from the cassette housing 102.

[0007] This invention is based on the above-mentioned guide claw with a protrusion for a spring guide that is particularly difficult to bend. The contact part can be easily bent to solve the above conventional problems. It is.

[0008]

[Means to solve the problem]

The shaft of the cassette housing that rotatably accommodates a disk as a signal recording medium. along the outer surface of the shutter mounting section, along the end surface of the shutter insertion side of the shutter mounting section mentioned above. While the shutter guide groove is provided in the state, the shutter guide groove is provided on the inner surface of the shutter mounting part. A disc with a shutter spring guide protrusion at a position corresponding to the shutter guide groove. In the cassette, From the bottom of the shutter guide groove, press the spring of the shutter spring guide protrusion. A slit was provided that ran through the ring guide surface.

[0009]

[Effect]

From the bottom of the shutter guide groove, insert the shutter spring guide provided on the back side of the shutter guide groove. The slit that passes through the spring guide surface of the shutter protrusion allows the shutter The part with the pulling guide protrusion is also relatively easy to bend, which allows the shutter to can be inserted easily.

0010

【Example】

Next, the disk cassette of the present invention will be explained with reference to FIGS. 1 to 4.

[0011] 1 is a disc cassette of the present invention, which includes a disc 2 as a recording medium and the disc cassette of the present invention. A cassette housing 3 that rotatably houses the disk 2, and a shaft of the cassette housing 3. It is inserted into the shutter mounting part 5 from the end face 4 on the shutter insertion side, and the upper part of the shutter mounting part 5 is inserted. A shutter guide groove 6 formed along the end surface 4 on the shutter insertion side. By fitting the guide claws 7 and 8 into the cassette housing 3, the The attached shutter 9 and the shutter 9 are attached to one side 1 of the shutter mounting portion 5. 0 to keep the head insertion hole 11 provided in the cassette housing 3 closed. A shutter spring 12 is provided.

0012 The disk 2 has a magnet in the center of a disk body 21 made of a synthetic resin sheet. The hub 22 is constructed by attaching a hub 22 made of a metal having properties.

[0013] A signal recording surface is formed on the lower surface of the disc body 21, and a signal recording surface is formed on the lower surface of the disc body 21. 22 for attachment to the spindle of a disk drive.

[0014] The cassette housing 3 is made of synthetic resin with appropriate elasticity such as ABS resin, and It is constructed by overlapping lower halves 31 and 32.

[0015] A shutter guide groove 6 is provided on the outer surface of the lower half 32, and a shutter guide groove 6 is provided on the inner surface. A shutter spring guide protrusion 33 is provided at. (See Figure 2).

[0016] The shutter spring guide protrusion 33 is located at one end in the length direction of the shutter guide groove 6. on the end side so as to overlap the shutter guide groove 6, that is, as shown in FIG. As shown, one side 34 of the shutter guide groove 6 and the shutter spring guide protrusion 33 The spring guide surface 35 is provided so as to be flush with the spring guide surface 35 in the upper and lower directions.

[0017] Then, the spring guide protrusion is inserted from the bottom surface of one end side of the shutter guide groove 6. A slit 36 passing through the lower half 32 over the spring guide surface 35 of the spring 33 is provided.

[0018] In addition, a hub fitting hole 37 is provided in the center of the lower half 32 as shown in FIG. At the same time, the outer periphery of the hub fitting hole 37 is directed toward the shutter guide groove 6. An elongated rectangular head insertion hole 11 is provided.

[0019] On the other hand, a ring-shaped hub positioning protrusion (not shown) is provided in the center of the upper half 31. In addition, the head insertion hole 38 is provided on the outer periphery of the hub positioning protrusion. A rectangular pad insertion (not shown) similar to the above is provided.

[0020] Then, the lower surface side of the hub 22 of the disk 2 is inserted into the hub fitting hole 37 of the lower half 32. and fit the hub positioning protrusion of the upper half 31 on the upper surface side of the hub 22. By joining the upper and lower hubs 31 and 32 with the disc 2 in between, the cover is assembled. A set housing 3 is configured.

[0021] The shutter 9 is formed by bending a metal plate into a U-shaped cross section.

[0022] In other words, the shutter 9 overlaps the end surface 4 of the cassette housing 3 on the shutter insertion side. At right angles to the housing end face overlapping piece 41 and at both ends of the housing end face overlapping piece 41, in parallel to each other on the upper and lower surfaces of the cassette housing 3, that is, the upper and lower halves 31 and 32. By connecting the upper and lower pair of overlapping housing clamping pieces 42 and 43, the cross section is made into a U-shape. It is formed.

[0023] One side of the upper and lower pair of housing pieces 42 and 43 has the pad insertion hole and Notch windows 44 and 45 are formed that overlap the head insertion hole 11, respectively. Both ends near the housing end face overlapping piece 41 side on both left and right sides of the lower housing clamping piece 43 The pair of guide claws 7 and 8 are cut and raised.

[0024] Then, the casing is removed from the opening 46 facing the housing end face overlapping piece 41 of the shutter 9. When the end surface 4 of the shutter housing 3 on the shutter insertion side is inserted, the guide claw 7 of the shutter 9, 8 abuts on the guide claw contact parts 47 and 48 of the lower half 32, and these guide claw contact parts 47 and 48 are pressed toward the upper half 31 side.

[0025] When the guide claws 7 and 8 press the guide claw contact parts 47 and 48, the slit 36 Due to the presence of the shutter spring guide protrusion 33, which was difficult to bend in the past, The guide claws 7 and 8 can be easily moved to the position of the shutter guide groove 6. The shutter 6 moves to the cassette housing and fits into the shutter guide groove 6. 3, it is slidably attached to the shutter attachment portion 4 of No. 3.

[0026] Furthermore, the shutter spring 12 uses a so-called torsion coil spring. As shown in FIG. 4, both ends of the spring 11 are arranged at substantially right angles in opposite directions. It is bent to form a cassette housing engaging portion 51 and a shutter engaging portion 52.

[0027] After attaching the shutter 9 to the cassette housing 3 as described above, as shown in FIG. As shown in the figure, upper and lower hardware are provided on the end face 4 of the cassette housing 3 on the shutter mounting side. Insert the spring 12 through the gap 53 between the wings 31 and 32, and A spring locking portion where the cassette housing engaging portion 51 on one end side of 2 is provided on the lower half 32. 54, and the shutter engaging portion 52 on the other end side is engaged with the shutter spring. Slide the above system along the spring guide surface 35 of the guide protrusion 33. The shutter engaging portion 52 is locked to a spring locking portion 55 formed by cutting and raising the shutter 9. By this, the shutter spring 12 springs the shutter 9, and the shutter 6 to one side 10 of the shutter mounting part 5 provided on the cassette housing 3, and then The terminal 9 is maintained in a so-called closed state.

[0028] Then, the shutter 9 is slid against the spring force of the shutter spring 12. When the shutter engaging portion 52 on one end side of the shutter spring 12 is The shutter moves along the slide guide surface 35 of the protrusion 33 provided on the inner surface of the lid 32. The cutter spring 12 is bent into a U-shape.

[0029] Then, the shutter 9 is pressed against the other side of the shutter mounting portion 5. Then, the cutout windows 44 and 45 provided in the shutter 9 become the pad insertion hole and the head insertion hole. These pad insertion holes and head insertion holes will be in an open state when they overlap each other. It is.

[0030] Note that in the embodiment shown in the figure, one end side of the shutter guide groove 6 in which the slit 36 is provided is opposite to the other end side. A long hole 61 penetrating the inner surface of the lower half 32 is provided on the opposite bottom surface. The elongated hole 61 also allows the guide claw contact portion 48 of the cassette housing 3 to be easily bent. ing.

[0031]

[Effect of the idea]

The present invention is a disk cassette having the configuration as described above, which has a cassette housing. From the bottom of the shutter guide groove provided on the outer surface of the body to the inner surface of the cassette housing. It passes through the spring guide surface of the shutter spring guide protrusion that is The provision of the slit has the following effects.

[0032] (1) The part where the shutter spring guide protrusion is provided also has a slit so that the guide claw can The contact part becomes easier to bend, making it easier to insert (assemble) the shutter.

[0033] (2) The guide claw abutting part may be easily bent. Raise the guide claw higher to prevent the shutter from tightening. It is possible to make the cassette case difficult to fall off.

[Brief explanation of drawings]

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

FIG. 2 is a perspective view of the shutter assembled to the cassette housing.

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

FIG. 4 is a perspective view of main parts.

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1... Disk cassette, 2... Disk, 3... Cassette housing, 4... End surface on the shutter insertion side, 5... Shutter mounting part,
6...Shutter guide groove, 33...Shutter spring guide protrusion, 36...Slit.

Claims (1)

[Scope of utility model registration request] 1. A shutter guide groove is provided on the outer surface of a shutter mounting portion of a cassette housing rotatably housing a disk as a signal recording medium, along the end surface of the shutter mounting portion on the shutter insertion side. In the disk cassette, a shutter spring guide protrusion is provided at a position corresponding to the shutter guide groove on the inner surface of the shutter mounting portion, from the bottom surface of the shutter guide groove,
A disc cassette characterized in that a slit is provided that extends through the spring guide surface of the shutter spring guide protrusion.