JPH05242627A - Cartridge - Google Patents

Abstract

PURPOSE:To stabilize and smooth the opening and closing operations of a shutter of the cartridge which houses an information medium and has a freely openable and closable shutter. CONSTITUTION:The case 1 of the cartridge freely slidably provided with the shutter 4 consists of an upper case and a lower case. The sliding side wall parts 11 of the shutter 4 of the case 1 forms surfaces parallel with the butt surfaces 12 of the upper and lower cases 1 by the butt surfaces of the stationary side mold and moving side mold of molds for molding the cases at the position part from the butt surfaces 12. The case side wall parts of the upper and lower case are thereby formed of the flat parts of the parting surfaces of the molds for molding, by which projections are eliminated in the sliding part of the shutter. The motion of the shutter is thus smoothed and the safe operation is assured without generating an operation defect. The reliability of the opening and closing actions of the shutter is thus enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible disk, a hard disk, in particular, an audio or video cassette having a disk cartridge or a tape medium in which an optical disk or the like is rotatably housed in a case.
The present invention relates to a cartridge of a digital compact cassette.

[0002]

2. Description of the Related Art Generally, an information medium such as a magnetic disk, an optical disk, a magneto-optical disk, or a tape is set in a recording / reproducing apparatus and used as a cartridge housed in a case. Conventional media of this kind are liable to be dusty or dusty during handling, and are especially vulnerable to damage.In addition, they are greatly affected by temperature changes.Therefore, openings such as the head insertion hole and drive shaft insertion hole provided in the case It is known to include a shutter that opens and closes when a disc is used or not used.

[0003]

In a conventional cartridge, a case for accommodating an information medium is composed of an upper case a and a lower case b as shown in FIGS. 10 and 11, and a shutter is used for molding each case. The side wall of the sliding case of c has a mating surface of the mold, a so-called parting surface, and the side wall of the case has a mold draft angle. Therefore, if the parting surface changes in the sliding range of the shutter, An apex p is generated on the abutting surface of the case, the shutter c is caught at the apex p, and the opening / closing operation of the shutter c becomes unsmooth. There was a risk of malfunction, and there was a problem in terms of reliability. The present invention is intended to eliminate these conventional drawbacks, the shutter has a good slidability without being caught in the case, and can be operated smoothly.
It aims to provide an inexpensive cartridge which can improve safety without malfunctioning, improve reliability and durability, change the parting surface of the case molding die structure, and easily manufacture the die. It is a thing.

[0004]

SUMMARY OF THE INVENTION The present invention is a cartridge in which a case for accommodating an information medium and having an opening such as a head insertion hole is slidably provided with a shutter for opening and closing the opening. The case includes an upper case and a lower case, and a case side wall portion of the case in which the shutter slides has a surface parallel to the abutting surfaces of the upper and lower cases at a position apart from the abutting surface of the upper and lower cases. A cartridge characterized in that it is configured as an abutting surface of a fixed side mold and a movable side mold of a molding die.

[0005]

[Action] mating surface of the mold and fixed mold A and the movable-side mold B for molding the casing 1, i.e. the parting plane PL at a position away from the abutting faces 1 ₂ of the side wall 1 ₁ of the case Surface shutter 5 parallel to the abutting surfaces 1 ₂ of the upper and lower cases
When but forms a casing sidewall 1 ₁ surface sliding, can not have vertex abutting surfaces of the upper and lower cases 1, the shutter 5
It can be smoothly slid without being caught and does not malfunction, and the reliability of the opening / closing operation of the shutter 5 can be improved.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to an example of a disk cartridge shown in FIGS. A shutter 4 for opening and closing the opening 3
Is a slidable cartridge, and the case 1 is composed of an upper case and a lower case, and the side wall portion 1 ₁ of the case 4 on which the shutter 4 slides is the abutting surface 1 of the upper and lower cases 1. _At a position apart from ₂ , a surface parallel to the abutting surface 12 is formed by the abutting surface of the fixed side mold A and the movable side mold B of the case forming mold, that is, a horizontal parting surface PL. . In particular, if there is a step in the shutter slide portion side wall, it is effective to most stepped surface on the movable mold and away 1 ₃ The combined mold surface (parting surface).

In this case, a fixed side mold A and a movable side mold B are used as case molding molds used for molding the case 1, and a portion molded by the movable side mold B is used.
That direction the case side wall portion 1 ₁ of the stroke range in which the shutter 4 slides away from the shutter 4, for example, preferably formed from the case outer peripheral surface inwardly.

In the figure, reference numeral 5 denotes a shutter area for sliding the shutter 4 having a U-shaped cross section, which is a concave surface formed on the outer surface of the case. Reference numeral 6 is a disk hub, 7 is a hub fitting hole, 8 is an erasure prevention plug, and 9 is a shutter lock. The case 1 is selected and configured as a shell in the form of various cartridges that accommodates disk-shaped media such as floppy disks, compact disks, video disks, and optical disks or tape-shaped media such as audio, video, and digital compact cassettes. For example, the digital compact cassette 1 shown in FIGS.
0, the tape-shaped medium is stored in the case 1, and the case 1
Shutter 4 for opening and closing the opening 3 formed in the side wall 1 ₁ of the available to those having slidably to the shutter area 5.

[0009]

The present invention is a cartridge in which an information medium is housed and an opening such as a head insertion hole is formed, and a shutter for opening and closing the opening is slidably provided. The case side wall portion, which is composed of an upper case and a lower case, in which the shutter slides,
A case parallel to the abutting surface of the upper and lower cases is configured as a surface parallel to the abutting surface as the abutting surface of the fixed-side mold and the movable-side mold of the case molding die, and thus the case of the upper and lower cases. Since the side wall is formed by the flat part of the parting surface of the molding die, there is no protrusion on the sliding part of the shutter, the movement of the shutter is smooth, and it can be operated safely without malfunction. , The reliability of the shutter opening / closing operation can be improved, and
As for the case molding die, since the parting surface does not change much, the die can be manufactured easily and at low cost, and the quality and durability are improved, and the case is not scratched or scratched when the shutter is opened or closed. It is convenient to handle because it does not cause shavings and does not interfere with recording and playback such as dropout.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a perspective view of the example of FIG. 1 in a separated state.

3 is an enlarged perspective view of a portion of the example of FIG.

FIG. 4 is an enlarged vertical sectional view taken along line I-I of FIG.

5 is a partially enlarged vertical cross-sectional view showing a molded state of the example of FIG.

FIG. 6 is an explanatory perspective view of the example of FIG.

FIG. 7 is a perspective view of another embodiment of the present invention showing a case without a shutter.

8 is a perspective view showing a state in which the shutter of the example of FIG. 7 is closed.

9 is a perspective view showing a state where the shutter of the example of FIG. 7 is opened.

FIG. 10 is an enlarged perspective view of a part of a conventional example.

11 is an enlarged vertical sectional view taken along line II-II of FIG.

[Explanation of symbols]

1 case 1 ₁ case side wall 1 ₂ butting surface 1 ₃ step surface 2 medium 3 opening 4 shutter 5 shutter area A fixed side mold B movable side mold PL parting surface

Claims (2)

[Claims] 1. A cartridge in which a case for accommodating an information medium and having an opening such as a head insertion hole is slidably provided with a shutter for opening and closing the opening, the case comprising an upper case and a lower case. A case side wall of the case in which the shutter slides, and a surface parallel to the abutting surface of the upper and lower cases at a position separated from the abutting surface of the upper and lower cases. A cartridge characterized by being configured as a butting surface of a mold and a movable side mold. 2. The mold is composed of a fixed mold and a movable mold, and a portion formed by the movable mold on which the shutter slides is formed inward from the outer peripheral side surface of the case. The cartridge according to claim 1, which uses a mold.