JPH06180964A - Cartridge - Google Patents

Abstract

PURPOSE:To improve the appearance of a cartridge by a method wherein the molding property of a case in the cartridge is improved and gate marks are made hardly noticeable. CONSTITUTION:A single gate 18 for molding a case 1 is provided outside the region of a medium housing part 14 and only inside a slide area 5 for a shutter. Thereby, the molding property of the case is improved, a gate mark is masked and made hardly noticeable even in a transparent case, the appearance of the title cartridge is improved and the commercial value of the title cartridge is increased.

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 as a cartridge housed in a case and used. The conventional media of this kind are not only susceptible to dust and dust during handling, and are especially vulnerable to damage, but they are greatly affected by temperature changes, so the openings such as the head insertion hole and drive shaft insertion hole provided in the case It is known to have a shutter that opens and closes when the disc is used or not used.

[0003]

In a conventional cartridge provided with a shutter for opening and closing an opening formed in a case, since a sliding guide is fitted and arranged in a slide groove, the case is formed of a molding resin gate. Injection molding,
Since the molding was done by arranging the gate at a two-point gate or at another place, multiple gate traces remain and the case appearance is poor in product quality, and the resin fluidity is poor, and short shots, gas burns and There is a drawback that a weld line is generated so that the moldability and the appearance are deteriorated and the commercial value is lowered. The present invention is intended to eliminate the conventional defects and reduces the appearance of gate traces on the surface of the case to make them inconspicuous, enhances the appearance quality of the case without the occurrence of welds, and significantly improves the moldability, thereby reducing the commercial value. It is intended to be a low-cost product which can be made into a high-cost cartridge and whose productivity can be improved.

[0004]

According to the present invention, a medium is housed inside a case having an opening into which a recording / reproducing head, a drive shaft and the like can be inserted, and a shutter for opening and closing the opening is slidable. In the provided cartridge, the molding resin gate of the case is provided as a one-point gate outside the region of the medium storage portion and inside the slide area of the shutter.

[0005]

By providing the molding resin gate of the case as a one-point gate outside the area of the medium storage section and within the slide area of the shutter, the gate is located in the thin portion of the shutter sliding section. The resin flowability is good, the moldability of the case is improved, the gate traces are also unnoticeable, there is no weld generation, and the hot water pool is formed outside the media storage part, It is used as a product that has little interference with and has greatly improved moldability, productivity and appearance quality.

[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. 1 to 4. A disk-shaped medium 2 as an information medium is housed in a case 1 and an opening 3 such as a head insertion hole is formed. A cartridge having a shutter (4) having a substantially U-shaped cross section for opening and closing the opening (3) slidably in the case (1), wherein the case (1) comprises an upper case and a lower case. The resin gate 18 for use as a one-point gate is provided outside the area of the medium storage portion 14 and only in the slide area 5 of the shutter, and the shutter 4 in the case 1 has a U-shaped cross-section sliding guide. 10 is provided with a slide groove 11 into which the sliding guide 10 is inserted from the side surface of the case 1 into the case, and one end of one sliding guide piece of the sliding guide 10 is provided. To the bent portion 10 ₂ of the concave groove 12 of the sliding guide and the other sliding guide piece is protruded in a direction into the interior of the case side so as to sandwich the case, for sliding The leading edge 10 ₃ of the guide piece is expanded outward.

In this case, the molding resin gate 18 is
One is provided in the shutter area 5 on the outer surface of the case, and a hot water pool 19 is provided on the inner surface of the case facing the molding resin gate 18 to improve the moldability. Further, the medium storage portion 14 is formed by an annular rib 20 projectingly provided on the inner surface of the case, and the hot water pool portion 19 is provided in a corner area 17 between the annular rib and the outer peripheral wall of the case.
Formability is improved by providing the gate 18 at a portion where the case plate thickness is thin corresponding to the shutter sliding portion.

The slide groove 11 is provided between the joint surfaces of the upper and lower cases, and the shutter 4
The sliding guide 10 has a gap into which the bent tip of the sliding guide 10 is fitted, and the sliding guides 10 of the shutter 4 are provided so as to face each other at positions projecting outward from both ends of the shutter plate of the shutter 4. Therefore, the case 1 is inserted and supported so as to be sandwiched from both upper and lower sides. Further, the sliding guide plate with a leading edge 10 ₃ of the sliding guide 10, there is to be inserted is bent in the slide groove 11 formed in the joint surface position of the upper and lower cases, both end positions of the shutter plate It is connected to.

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 and provided with a striped pattern 21. 6 is a clamping plate, 7 is a drive shaft hole, 8 is an erasure prevention plug,
Reference numeral 9 is a shutter lock, 14 is a medium storage portion, 15 is a label area, 16 is a visible portion, and a striped pattern 22 is attached to the peripheral portion. Incidentally, the case 1 is selected and configured as a shell of various cartridge forms accommodating a disk-shaped medium such as a floppy disk, a compact disk, a video disk, an optical disk or a tape-shaped medium such as an audio, video or a digital compact cassette. .

The shutter 4 is a metal or synthetic resin shutter, and has a chamfered portion 13 formed on the case side with a root portion 10 ₁ of a sliding guide 10 projecting inward from the side surface of the case. Alternatively, it is considered that the shutter is provided with a reinforcing portion that corresponds to or fits into the concave portion to enhance the strength of the shutter and improve the reliability.

[0011]

According to the present invention, there is provided a cartridge in which a medium is housed in a case having an opening into which a recording / reproducing head and a drive shaft can be inserted, and a shutter for opening and closing the opening is slidably provided. Since the case molding resin gate is provided as a one-point gate outside the area of the medium storage section and in the slide area of the shutter, even if the case molding gate is provided on the case outer surface, it is masked and distinguished. It is difficult, and because it is a one-point gate, it is unobtrusive and does not hinder the appearance, and because the gate is located in the thin case plate, the flowability of the molding resin is good and it is easy to mold, and there is no weld formation. Also, there are practical effects such as improved moldability, improved appearance quality, greatly enhanced commercial value, good productivity, and easy and inexpensive manufacturing.

[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.

FIG. 3 is an enlarged vertical sectional view taken along the line AA of FIG.

FIG. 4 is an enlarged vertical sectional view taken along the line BB in FIG.

[Explanation of symbols]

 1 Case 2 Disk Medium 3 Opening 4 Shutter 5 Shutter Sliding Area 10 Sliding Guide 17 Corner Area 18 Gate 19 Hot Water Pool 20 Annular Rib

Claims (2)

[Claims] Claims: 1. A cartridge is formed in a cartridge in which a medium is housed inside a case having an opening into which a recording / reproducing head, a drive shaft and the like can be inserted, and a shutter for opening and closing the opening is slidably mounted. A cartridge characterized in that the resin gate for use as a one-point gate is provided outside the area of the medium containing portion and within the slide area of the shutter. 2. The cartridge according to claim 1, wherein the molding resin gate is provided on an outer surface of the case, and a hot water pool is provided on an inner surface of the case facing the molding resin gate.