JP2926015B2 - cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cartridge for a flexible disk, a hard disk, in particular, a disk cartridge containing a rotatable optical disk or the like in a case or an audio or video cassette containing a tape-shaped medium, and a digital compact cassette. is there.

[0002]

2. Description of the Related Art Generally, an information medium, for example, 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. Conventional media of this type are susceptible to dust and dirt during handling, and are especially susceptible to scratches.Because they are greatly affected by temperature changes, openings such as the head insertion hole and drive shaft insertion hole provided in the case are required. It is known to have a shutter that opens and closes when a disk is used or not used.

[0003]

In a conventional cartridge having a shutter for opening and closing an opening formed in a case, a sliding guide piece is fitted in a slide groove so that the shutter slides on the case. When the shutter is moved, an external force is applied to the shutter and the guide piece is pressed against the end of the concave groove. Even if a chamfered portion is provided at the end, the shutter hits the chamfered portion and the shutter cannot be opened and closed smoothly. The operation was unstable due to the shaving of the case, and there was a problem in reliability. The present invention is intended to eliminate these conventional disadvantages, and improves the slidability without the tip of the sliding guide piece of the shutter being caught on the case or shaving the case even when an external force is applied to the shutter. The purpose of the present invention is to provide a cartridge that can be operated smoothly and without malfunction, enhance safety and improve reliability, and is easy and inexpensive to manufacture.

[0004]

SUMMARY OF THE INVENTION The present invention provides a shutter for storing a medium in a case having an opening into which a recording / reproducing head and a drive shaft can be inserted, and opening and closing the opening, and a shutter for opening and closing the opening. In a cartridge in which a sliding guide piece extending to an end of a side plate is provided so as to slide in a groove formed in a guide wall on a side surface of a case, an end surface of the guide wall forming an end of the groove is shuttered. A cartridge having a curved chamfer that is gently inclined at an angle of 45 degrees or less along a sliding direction.

[0005]

When opening and closing the shutter in the case, when the tip of the sliding guide piece of the shutter is inserted into the concave groove and slides, the guide which forms the end of the concave groove even if it hits the guide wall end of the case. Set the wall end face at an angle of 45 along the shutter sliding direction.
The chamfer is a curved surface that is gently inclined to less than 10 degrees, so that even if external force is applied to the shutter, the sliding guide piece does not ride on the concave groove end of the case and becomes inactive, and the shutter moves smoothly. At the same time, there is no occurrence of the scraping phenomenon, and the reliability is remarkably enhanced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the example of a disk cartridge shown in FIGS. 1 to 6. A disk medium 2 as an information medium is accommodated in a case 1 and an opening 3 such as a head insertion hole is formed. A cartridge 4 having a shutter 4 having a substantially U-shaped cross section for opening and closing the opening 3 slidably provided in the case 1. The case 1 comprises an upper case and a lower case. The slide 4 is provided with a sliding guide piece 10 having a U-shaped cross section, and the sliding guide groove 10 is inserted into the case 1 from the side surface of the case 1 into the case 1. Yes comprises the edge of the (FIGS. 1 and 2), and one sliding guide piece of the sliding guide piece 10 has a bent portion 10 ₂ of the groove 12 of the sliding guide, and the other by projecting the lock engaging piece 10 ₄ in the sliding guide piece is there. (Fig. 3)

In this case, the concave groove 11 is formed as shown in FIG.
As shown in FIG. 5 and FIG.
A sliding guide piece 1 for the shutter 4
0 with a gap to fit the bent tip,
Insert the end of the concave groove 11 into the guide wall 1 ₁Guide wall end face formed by
1_TwoTo an angle θ of 45 degrees or less along the shutter sliding direction
Chamfered into a smoothly inclined curved surface, and
The sliding guide piece 10 of the shutter 4 is
Opposing each other at positions protruding outward from both ends of the
So that the case 1 is sandwiched from both upper and lower sides.
It is inserted and supported. (FIGS. 5 and 6)
Tip edge 10 of id piece 10_ThreeThe sliding guide plate with
Bend to concave groove 11 formed at the joint surface position of lower case
And inserted at the position of both ends of the shutter plate
It is connected to.

In the drawing, reference numeral 5 denotes a shutter area for sliding the shutter 4 having a U-shaped cross section, and a concave surface formed on the outer surface of the case. 6 is a clamping plate, 7 is a drive shaft hole, 8 is an erasure prevention plug, 9 is a shutter lock,
Reference numeral 4 denotes a medium storage unit, 15 denotes a label area, and 16 denotes a visible part. The case 1 is configured to be a disk-shaped medium such as a floppy disk, a compact disk, a video disk, or an optical disk or a tape-shaped medium such as an audio, a video, or a digital compact cassette. .

[0009] Incidentally, the shutter 4 is a metal or a synthetic resin shutter chamfers forming a root portion 10 ₁ of the sliding guide piece 10 projecting from the direction into the interior of the case side surface on the case side It is considered to provide a reinforcing portion corresponding or fitted to the recess 13 or the concave portion to enhance the strength of the shutter and improve the reliability. Further, even if the bent portion into which the slide guide piece 10 is fitted into the concave groove 11 is a flat plate, the edge thereof may be chamfered in an R shape to facilitate the shutter operation.

In the embodiment shown in FIG. 7, a sliding guide piece 10 provided at one end of the shutter 4 and bent in a substantially U-shaped cross section is provided.
In, chamfered with a convex surface ₁₀₅ which is inclined or curved abutting surface in the sliding direction on the guide wall 1 _1, said surface is eating the guide wall inclined end face forming the end of the concave groove 11 A smooth shutter operation is performed without hindrance or shaving of the case.
In addition, the shutter 4 bends one sheet of material into a U-shaped cross section,
Sliding guide piece 10 of the contact piece, the case 1 and a bent portion 10 ₂ and the expanding tip edge 10 ₃ and the lock engaging piece 10 ₄ integrally
Is fitted so as to sandwich it.

[0011]

According to the present invention, there is provided a shutter for accommodating a medium in a case having an opening through which a recording / reproducing head and a drive shaft can be inserted, for opening and closing the opening, and a shutter provided at a side plate edge of the shutter. In a cartridge in which an extended sliding guide piece and a case are provided so as to slide in a concave groove formed by a guide wall on a side surface of a case, an end surface of the guide wall forming an end of the concave groove is moved in a shutter sliding direction. With a curved chamfer that is gently inclined at an angle of 45 degrees or less, even if external force or shock is applied to the shutter, the sliding guide piece rides on the concave groove end of the case and opens and closes. The shutter moves smoothly without any trouble, and the shutter can be opened and closed safely without malfunctioning the shutter. In addition, case damage such as rubbing or chipping of the case when opening and closing the shutter, Minimal powder generation phenomena can significantly improve reliability without interfering with recording / reproducing such as dropout, and quality and durability are improved, making production easy and inexpensive Practical effects such as

[Brief description of the drawings]

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

FIG. 2 is a perspective view of the separated state of FIG.

FIG. 3 is an enlarged perspective view of the shutter of FIG.

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

FIG. 5 is a perspective view of a part of the lower case of FIG. 1;

FIG. 6 is a partially cutaway enlarged sectional view of the concave groove portion of FIG. 5;

FIG. 7 is an enlarged perspective view of a guide member for sliding a shutter according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Case 1 ₁ Guide wall 1 ₂ Guide wall end surface 2 Disc-shaped medium 3 Opening 4 Shutter 5 Shutter area 10 Sliding guide 10 ₁ Root part 10 ₂ Bent part 10 ₃ Tip edge 11 Concave groove 12 Concave groove

Claims (3)

(57) [Claims] 1. A shutter for storing a medium in a case having an opening through which a recording / reproducing head, a driving shaft, and the like can be inserted, and opening and closing the opening, and a slide extending from a side plate end of the shutter. In a cartridge in which a moving guide piece is slid on a side wall of a case in a groove formed by a guide wall, an end surface of the guide wall forming an end of the groove is formed at an angle of 45 along a shutter sliding direction. A cartridge having a curved chamfer that is gently inclined to a degree or less. 2. A shutter for accommodating a medium in a case having an opening through which a recording / reproducing head, a drive shaft, and the like can be inserted, and opening and closing the opening, and a slide extending from a side plate edge of the shutter. In a cartridge provided with a moving guide piece and a sliding groove formed on a side surface of a case so as to slide in a concave groove formed by a guide wall, the sliding guide piece is bent into a substantially U-shaped cross section, and the bent portion is formed. The contact surface that projects from the case side to the inner surface to form the concave groove end and contacts the gently sloped curved chamfered portion, gently slopes from the center position in the front-rear direction of the sliding direction. A cartridge formed on a curved convex surface. 3. A shutter for storing a medium in a case having an opening through which a recording / reproducing head, a drive shaft, and the like can be inserted, and opening and closing the opening, and a slide extending from a side plate end of the shutter. In a cartridge provided with a moving guide piece and a sliding groove formed on a side surface of a case so as to slide in a concave groove formed by a guide wall, the sliding guide piece is bent into a substantially U-shaped cross section, and the bent portion is formed. A cartridge in which a lower edge of a bent portion corresponding to a gentle slope of a curved chamfered portion which protrudes from a case side to an inner surface to form the concave groove end is chamfered in an R shape.