JP3113046B2 - 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 containing a recording medium such as a tape-shaped or disk-shaped recording medium or a cleaning tape in a case.

[0002]

2. Description of the Related Art Generally, a tape cassette, a digital compact cassette (DCC), a compact disc (CD), an optical disc, and the like used in a digital data storage device, an audio or video device, etc., are protected from dust and dirt during handling. In addition, a type that is protected by a case so as not to be scratched and that is formed in the case, such as a pickup insertion hole, a drive shaft insertion hole, a reference pin insertion hole, and a head insertion hole, is opened and closed by a shutter. The shutter is opened when recording / reproducing is used, and the shutter is closed when not in use. That is, as shown in FIGS. 11A and 11B, the shutter d used in the conventional cartridge is formed of a cover member having a U-shaped cross section that is bent over the front end surface of the case, and is interposed on the inner surface side of the shutter. Case e urged by spring a
Each opening formed in the case, for example, a pickup insertion hole, a drive shaft insertion hole, and other openings are covered and closed when not in use, and are slidably provided in a slide area of the case so that they can be opened when using recording and reproduction. I have.

[0003]

In this conventional cartridge, the shutter urging spring a exists between the outer surface of the case e and the inner surface of the shutter d. It is easy to adhere to the medium, and it is necessary to have a highly sealed structure such as providing a wall on the inside to prevent this. The sliding portion of the spring a reaches the inside of the case via the guide groove b. There is a drawback that the structure of the mold becomes extremely complicated and the strength is reduced. In addition, since the spring locking projection c is located substantially at the center of the shutter d and the structure becomes complicated, manufacturing is troublesome, and even during assembly, , It is necessary to temporarily set the spring in advance, the assembly work is complicated and productivity cannot be improved, and the other end of the spring needs to be fixed. There . SUMMARY OF THE INVENTION The present invention is intended to eliminate these conventional disadvantages, and makes it easy to separate dust and improve the assemblability of a shutter significantly without increasing the degree of hermetic structure. It is an object of the present invention to provide a cartridge which can smoothly operate and helps to prevent shaving, can greatly improve reliability, and can simplify the structure of a case, a mold and a shutter.

[0004]

According to the present invention, a slide area of a shutter having a substantially U-shaped cross section is formed in a case for accommodating an information medium therein, and the shutter is slid on the slide area by urging the shutter with a spring. A cartridge provided freely and configured to open and close an opening in a case, wherein a spring locking projection is provided on one end edge of the shutter so as to protrude toward the case, and one end of the spring is connected to the spring locking projection. At the same time, a concave groove for engaging and engaging the spring locking projection and guiding and sliding is provided on the case edge side of the slide area, and a spring sliding concave surface is provided around the concave groove so as to allow movement of the spring. A spring, wherein the other end of the spring is formed so as to face the guide slide groove, and an insertion hole for inserting and locking the tip of the spring is provided at the bottom of the tip of the other end of the spring. It is.

[0005]

In the shutter assembled to the case, one end of a shutter urging spring having the other end of the spring inserted and fixed in the other end fitting recess of the spring is locked by a spring locking projection on one edge of the shutter. The stop projection is fitted into the groove, and one end of the shutter biasing spring is located on the spring sliding concave surface provided in the slide area and is present on the inner surface of the case to slide the shutter. The structure of the case and the mold can be simplified without the generation of dust and a highly sealed structure, and since the spring locking projection is provided at one edge of the shutter, the shutter configuration is simple. At the time of assembly, the spring can be attached after the shutter is assembled in the case, so that the assemblability can be easily and accurately performed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 6 of an example of a DCC type cartridge. A tape-shaped recording / reproducing medium 1 or a case 2 for accommodating a medium such as a cleaning tape has a substantially U-shaped cross section. Slide area 4 of shutter 3
A shutter 3 is slidably provided on the slide area 4 by urging the shutter 3 with a spring 5 to open and close an opening in the case 2.
A spring locking projection 6 is provided on one edge of the upper side of the
One end of the spring 5 is locked to the spring locking projection 6, and a concave groove 7 for fitting the spring locking projection and guiding and sliding is provided on the case edge side of the slide area 4. Spring sliding concave portions 8 and 9 are formed in a range where the movement of the spring 5 is permitted around the periphery of the spring 5, and the other end fitting concave portion 10 of the spring 5 is formed so as to face the guide sliding concave groove 7. An insertion hole 11 for inserting and locking the tip of the spring 5 is provided at the bottom of the tip of the recess 10 for fitting the other end of the spring.

In this case, the shutter 3 is made of a synthetic resin or a thin metal plate and has a substantially U-shaped cross section and is slidably fitted in the slide area 4 of the case 2. and each other and, fitted bent inserted into the guide groove 13 provided with the shutter free end 3 ₁ to the case 2, Yes and allow engagement supported by dive to the lower surface of the guide piece 12, the shutter 3 is case 2 The shutter is biased in one direction by a shutter biasing spring 5 provided between the outer surface of the shutter and the inner surface of the shutter so that the shutter can be moved to the old position.

The case 2 uses a box body composed of an upper case and a lower case, and a pair of hubs 14 around which the tape-shaped recording / reproducing medium 1 is wound are rotatable around the hub fitting peripheral wall. And a tape guide 15 of a guide roller provided in a tape running path running between the hubs 14, 14.
And a front outer wall 16, with front openings 18, 18 and a central opening 17 formed at intervals between the front outer walls 16, 16, and positioning holes 19, 20 formed. Have been.

[0009] Incidentally, in the case 2, the spring other end in recess 1 that can fit the other end 5 ₁ of the shutter biasing spring 5
0 and a spring tip insertion hole 11 for inserting and locking a spring tip in an extended bottom of the spring other end fitting recess 10.
The spring 5 is provided inside to help fix the interior of the spring 5, and the elastic force (restoring force) of the spring always urges the spring 5 to the back of the spring tip insertion hole 11, so that another member is provided. There as a convenient configuration which does not require the spring end fixing means, such as with, also, the coil portion that previously formed the spring coil portions in recess 25 or protrusion interpolating fitting the coil portion 5 ₃ of the spring 5 5 The range of the thin portion of the case may not be widened without moving the case ₃ , and the case strength may be maintained.

[0010] In the embodiment of FIGS. 7 and 8, as bent end 5 ₂ end the key shape of the spring 5, which has a prevention structure out in connection with the spring locking projection 6, a spring slide concave portion 8 is also formed in a state of continuous around the groove 7, and is a rectangular spring sliding concave portion 8 which is a corner of the interpolating recess 25 fitting the coil portion 5 ₃ of the spring 5.

[0011] In the embodiment of FIG. 9, fitted with spring locking projections 6 and grooves 7 to fit it provided on the shutter 3 in consideration of assembly of the spring 5, the coil portion ₃ of the spring 5 adjacent example of the opposite, the spring sliding concave portion 8 in the guide groove 13 and the above-described embodiment the arrangement of the other end 5 _first spring the other end in recess 10 of the spring coils portion in recess 25, a spring 5 for It is arranged.

In the figures, 22 and 23 are fitting holes, 24 is a drive shaft hole, and 27 and 28 are window holes.

In the illustrated example, a tape cassette is used, but the present invention can be applied to an example of a disk cartridge such as an optical disk or another hard disk as shown in FIG.

[0014]

According to the present invention, there is provided a cartridge having a structure in which a shutter is slidably provided by a spring in a slide area formed in a case to open and close an opening in the case. A spring engaging protrusion is provided on one end edge on the case side, one end of the spring is engaged with the spring engaging protrusion, and a groove for guiding and sliding the spring engaging protrusion is formed in the slide area. A spring sliding concave surface portion is formed on the side of the case edge, and a spring sliding concave portion is formed in a range where the movement of the spring is allowed around the concave groove, and the other end fitting recess of the spring is formed facing the guide sliding concave groove. In addition, by providing an insertion hole for inserting and locking the tip of the spring at the bottom of the tip of the spring other end fitting recess,
The shutter can be easily incorporated into the case, and the information medium can be protected from dust such as white powder generated during operation without requiring the case to have a highly sealed structure. Since the moving part does not reach the inside of the case, the structure of the case and the mold is simple, and the spring locking projection is at one edge of the shutter to lock one end of the shutter urging spring. The structure is also simple and the spring can be attached after the shutter is assembled in the case during assembly, so that the assembling work can be performed reliably and efficiently, and the spring fixing means can be attached even as the shutter moves. The case can be simplified, the case strength can be maintained reliably, and there is no problem with the strength. In addition, the sliding opening and closing operation of the shutter can be performed smoothly, which helps to prevent shaving and adversely affects the recording / reproducing medium. It safely used without, in which the the assembling property and reliability can be remarkably improved.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment of FIG.

FIG. 3 is an enlarged vertical sectional view taken along line II of FIG. 2;

FIG. 4 is a perspective view of a case excluding a shutter of the embodiment of FIG. 1;

FIG. 5 is a perspective view showing a state in which the shutter of the embodiment shown in FIG. 1 is operated.

FIG. 6 is a plan view of the embodiment of FIG. 5;

FIG. 7 is a plan view of another embodiment of the present invention.

8 is a plan view showing a state where the shutter of the embodiment of FIG. 7 is operated.

FIG. 9 is an enlarged plan view of a part of still another embodiment of the present invention.

FIG. 10 is a plan view of another embodiment of the present invention.

FIGS. 11A and 11B are perspective views of a conventional example, in which FIG. 11A shows a shutter in an open state, and FIG. 11B shows a shutter in a closed state.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 recording / reproducing medium 2 case 3 shutter 3 ₁ free end 4 slide area 5 shutter biasing spring 5 ₁ other end 5 ₂ bent end 5 ₃ coil portion 6 spring locking projection 7 concave groove 8 spring sliding concave surface 9 spring Sliding concave portion 10 Spring other end fitting concave portion 11 Spring fixed side tip insertion hole 12 Guide piece 13 Guide concave groove 14 Hub 25 Spring coil portion fitting concave portion

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-144227 (JP, A) JP-A-5-47141 (JP, A) JP-A-3-86986 (JP, A) 44857 (JP, A) JP-A-3-183078 (JP, A) JP-A 63-173760 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 23/00

Claims (2)

(57) [Claims] 1. A case for accommodating an information medium therein, wherein a slide area of a shutter having a substantially U-shaped cross section is formed, and the shutter is slidably provided on the slide area by urging the shutter with a spring. a structure as the cartridge for opening and closing the opening, a spring locking projection on one edge of the shutter projecting from the case side, engaging one end of the spring to the spring locking projection
Stop and fit this spring locking projection to guide and slide .
That groove and formed in the case end edge portion of the slide area, a range that allows the movement of the spring around the concave grooves to form a spring sliding concave portion, the other end in recess the guide sliding of the spring Depression
It is formed facing the groove, and the tip of the spring other end fitting recess is formed.
A cartridge provided with an insertion hole for inserting and locking a tip of a spring at a bottom portion . 2. The cartridge according to claim 1, wherein the case has a concave portion in which the coil portion of the shutter urging spring is fitted in the sliding concave surface portion of the spring.