JPS6386174A - Cartridge for information storage medium - Google Patents

Abstract

PURPOSE:To facilitate an assembly work by forming a guide wall for guiding a winding-round part in a cover member, and placing a detaining member for detaining a torsion spring member. CONSTITUTION:A shutter closing spring 20 is a torsion spring which has a winding-round part 20a wound round plural times, and has extended both and arm parts 20b, 20c in roughly V-shape. It is attached in a state that the winding- round part 20a formed in the middle part is placed in a space part 32 surrounded by ribs 30, 31 being a guide wall formed in a cover member 2b, and a detaining part 33 curved and formed in the tip of one end arm part 20b is engaged to an engaging recessed part 34 formed in the cover member 2b, and also, a detaining part 35 curved and formed in the tip of the other end arm part 20c is engaged to a shutter closing spring fixing plate 13 of a shutter 5. In the cover member 2b, a pin 40 as a detaining member for attaching easily the shutter closing spring 20 is provided at a position in a degree that the other end arm part 20c of the shutter closing spring 20 is brought into slight contact, and this pin 40 is constituted of the cover member 2b, and a boss provided as one body.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an improvement in an information storage medium cartridge for accommodating an information storage medium such as an optical disk.

(Prior Art) In recent years, for example, information has been stored by irradiating the surface of an information storage medium such as an optical disk with narrowly focused light, or information is reproduced by detecting reflected light from the surface of the optical disk. Information storage media have been put into practical use.

Although such information storage media have extremely excellent features such as being able to store and reproduce information at high density, if there is dust, chips, etc. attached to the surface, or scratches, etc., the surface may be damaged. There was a problem in that the progress of the light, such as a laser beam, irradiated to the device was obstructed, making it impossible to accurately store and reproduce information.

Therefore, conventionally, the information storage medium is housed in an information storage medium cartridge (hereinafter simply referred to as a cartridge) to facilitate protection and handling of the information storage medium.

The cartridge has an opening in the cartridge body for performing information processing on the information storage medium, that is, an opening for inserting a storage/reproduction head, and a driving means for holding and rotating the information storage medium. These openings are closed during non-recording and reproducing by means of a slidably attached shielding member (shutter), and are opened only during recording and reproducing.

Further, the shielding member is configured to be always biased to keep the opening fully closed by biasing means.

Conventionally, as a biasing means for opening the shielding member of a cartridge,
Compression coil springs were used, but compression coil springs require a certain diameter and length in order to open and close the shielding member smoothly, and cannot adequately cope with the recent trend toward smaller and thinner cartridges. However, instead of this, the use of a torsion spring member is being considered.

(Problems to be Solved by the Invention) However, the torsion spring member has a structure in which it has a winding part in the middle part and both arm parts extend at an angle of less than 180 degrees. There was a problem in that both arms sometimes opened, making installation difficult.

The present invention has been made based on the above-mentioned circumstances, and its purpose is to constantly bias a slidable shielding member that opens and closes an opening of a cartridge main body into a fully closed state using a twisting member. An object of the present invention is to provide a cartridge for an information storage medium having a structure in which the above-mentioned torsion spring member can be attached easily and reliably.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention comprises two cover members that are overlapped to accommodate an information storage medium therein, and the information storage medium to be stored inside the cover member. A cartridge body having an opening for processing information on a storage medium, a shielding member slidably attached to the cartridge body to open and close the opening, and a shielding member permanently attached so as to close the opening. In the cartridge for an information storage medium, the biasing means has a winding part in the intermediate part and a locking part formed at the tip of the arm part at one end, and an engagement part formed on the cover member. The torsion spring member is engaged with the concave portion and is attached with a locking portion formed at the tip of the arm portion at the other end being engaged with a spring fixing portion of the shielding member, and the cover member is provided with the winding. A guide wall for guiding the rotation is formed, and a locking member for locking the torsion spring member is arranged.

(Function) That is, in the present invention, since the guide wall and the locking member are arranged to position the torsion spring member, the torsion spring member can be held in a state where it is prevented from opening more than necessary during assembly, and the work is extremely easy. This can improve assembly efficiency.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 1 and 2 show the external appearance of an information storage 51 medium cartridge (hereinafter simply referred to as a cartridge) 1, and the solid line arrow in the figure indicates the information processing bag [(not shown)] of the cartridge 1.
The broken line arrow in the figure indicates the direction of removal.

In the figure, 2 is a cartridge body formed by overlapping two cover members 2a and 2b, and an optical disc 3 as an information storage medium is accommodated in this cartridge body 2. This optical disc 3 has an outer diameter of about 130 m, for example.

The inner diameter is approximately 151iaI and the thickness is 1.2~3! R11, and has an information forming layer on at least one side that can be recorded or reproduced using a laser beam or the like.

The cartridge body 2 has openings on both sides for information processing, in which storage/reproduction heads (not shown) are inserted, and driving means (not shown) for holding and rotating the optical disc 3 are inserted. Opening 4 for
, 4 are formed, and a shielding member (
5 (hereinafter referred to as a shutter) is slidably attached.

As shown in FIG. 3, this shutter 5 has a shape similar to that of a band plate bent into a U-shape, and near the bent portion there is a protrusion 7 that constitutes a guide means 6, which will be described later.・・・
are extrusion-molded so as to protrude toward the inner surface, and retaining pieces 8.8 are formed at both ends thereof.

On the other hand, the cartridge main body 2 has guide grooves 9, 9 formed along the opening/closing direction of the shutter 5 at the front end edges of both sides, and guide grooves 10, 9 extending along the opening edges of the openings 4, 4.
10 is now formed. When the shutter 5 is attached to the cartridge body 2, the protrusions 7 engage with the guide grooves 9.9 to constitute the guide means 6, and the tips thereof The engaging piece 8.8 formed at the opening 4.8 is adapted to engage the guide groove 10.10, and the shutter 5 is in a close contact state that can reliably close the opening 4. 4 is attached so that it can be slid freely to open and close.

Further, as shown in FIG. 4, the cartridge main body 2 is formed with an inclined guide portion 11, which serves as a portion over which the protrusion 7 protruding from the shutter 5 is fitted. This allows the shutter 5 to be easily attached to silicon. The shutter 5 is sometimes installed with the protrusions 7 facing the inclined guide part 11.
By pushing in the direction of the arrow in the figure, the protrusion 7... gradually spreads outward (in the direction of arrow B, B) along the firing material guide part 11..., and finally climbs over the highest part of the slope. and fit into the guide groove 9.9.

At this time, the engaging pieces 8.8 formed at both ends of the shutter 5 engage with the guide grooves 10.10, and the shutter 5 is mounted in a stable and slidable manner.

Further, as shown in FIG. 5, the shutter 5 is provided with a shutter locking plate 12 as an engaged portion, a shutter closing spring fixing plate 13 as a spring fixing portion, and the like.

Further, the cartridge main body 2 is provided with accidental erasure prevention members 14 and 15 for the A side and the 8th side, which prevent the recorded data of the optical disc 3 from being accidentally erased. A notch recess 16 is formed as a detection portion used to detect the surface and the B surface.

Further, as shown in FIG. 5, one end of the shutter closing spring 20 serving as a biasing means is engaged with the shutter closing spring fixing plate 13 of the shutter 5, and the shutter 5 is in a state of being engaged with the shutter closing spring fixing plate 13 of the shutter 5. 4 to the closing position (arrow C
In addition, a shutter lock mechanism 21 as a shielding member lock 81 structure is provided in the moving direction so that the shutter 5 can be fixed in a position where it closes the openings 4, 4. It has become.

The shutter lock mechanism 21 is rotatable via a support shaft 22, and is constantly biased counterclockwise (in the direction of the arrow in the figure) by a lever spring 23.
The locking member 24 is interposed in the movement path of the shutter locking plate 12.

The locking member 24 has a shape having an inclined surface 24a and a locking stepped portion 24b as an engaging portion, and when the shutter 5 is closed, the tip of the shutter locking locking plate 12 is moved to the sloped surface 24a. The locking member 24 then slides and moves on the inclined surface 24a while being displaced against the biasing force of the spring 23. The locking member 24 pushed at this time is gradually pushed down and always tries to return due to the force of the spring 23, but because of the sloped surface 24a, smooth passage is possible. When the shutter 5 reaches the position where the opening 4.4 is securely closed, the shutter locking plate 12
The tip of the locking member 24 faces the locking step portion 24b.
The locking step portion 24b is displaced counterclockwise (in the direction of the arrow) by the biasing force of the spring 23, and the locking plate 12 for shutter locking is moved.
The shutter 5 is locked.

Further, the release operation of the shutter lock mechanism 21 is performed by pushing down the free end side of the lock member 24 against the biasing force of the spring 23 using the lock release bar 25 of the information processing device, so that the locking plate 12 for the shutter lock can be released. The engagement with the locking step portion 24b is released.

The shirt closure spring 20 is made of a torsion spring member, and has a winding part 20a wound a plurality of times in the middle part as shown in FIGS. 6 and 7, and arm parts 20b and 20c at both ends. It has an approximately V-shaped extension.

Then, the winding part 20a formed in the intermediate part is used as a guide wall formed in the cover member 2b in a space part 32 surrounded by the beams 30 and 31, and one end of the winding part 20a is bent at the tip of the arm part 20b. The locking portion 33 is engaged with the locking recess 34 formed in the cover member 2b, and the other end arm portion 2
As described above, the locking portion 35 curved at the tip of the shutter 0c is engaged with the shutter closing spring fixing plate 13 of the shutter 5 when attached.

A pin 40 is protruded from the cover member 2b as a locking member for easily attaching the shirt flap closing spring 20 at a position where the other end arm 20c of the shirt flap closing spring 20 does not touch it even slightly. There is.

The bottle 40 is composed of a boss that projects integrally with the cover member 2b.

To attach the shirt closure spring 20, first fit the locking part 33 of the spring 20 into the engagement recess 34 formed in one cover member 2b, and then attach the sleeve using the winding part 20a as a guide wall. 30° and 31, and finally the other end arm part 2 on the side that interlocks with the L-shaped spring fixing part of the shutter 5.
0c is applied to the bottle 40 as a locking member. As a result, although the torsion spring member 20 tries to expand to a certain position, it is positioned so that it does not open beyond a predetermined level by the guide wall 30 and the pin 40 as a locking member, thereby facilitating the assembly work. Moreover, when the torsion spring member 20 is attached in a predetermined state, it does not come into contact with the bin 40 and hinder the movement of the shutter 5, so that good movement of the shutter 5 can be maintained.

Further, as shown in FIG. 6, arm portions 20b at both ends of the shirt closure spring 20 are formed on the cover members 2b and 2c constituting the cartridge body 2.

20c intersects ribs 30, 36 and 30'.

36', a rib 30.3 formed on the cover member 2b
6 has the same height dimension t as the thickness of the cover member 2b, but the ribs 30' and 36' formed on the cover member 2a
is the thickness of the shirt closure spring 2o than the thickness of the cover member 2a.
The height is lowered by a dimension (d+α) that is slightly larger than the wrapped diameter d, so that a slit 41 having a dimension (d+α) is formed.

Further, on the rear end surface of the cartridge 1, as shown in FIGS. 8 and 9, holding claws 45.4 of the autochanger are provided.
The held part 4 consists of a single-shaped concave part that allows the holding part 5 to be held.
6.46 is formed.

Further, as shown in FIG. 10, the notch recess 16 formed on one side edge of the cartridge body 2 is used not only for detecting the A side and the B side of the cartridge 1 as described above, but also for detecting the A side and B side of the cartridge 1 as described above. As shown in Figure 11, it is designed to engage with a positioning par 47 disposed in the cartridge accommodating portion of the autochanger that automatically loads the cartridge into the information processing device, and is used for positioning within the autochanger. It has become so.

Further, a cover member 2a constituting the cartridge main body 2,
As shown in FIG. 12, a plurality of concave boss portions 50 and convex boss portions 51, which can be press-fitted into each other, are arranged at appropriate locations on the mutually opposing surfaces of 2b. This makes it possible to prevent the generation of a gap between the double force lever members 2a and 2b when they are superposed.

Further, the erroneous erasure prevention members 14, 15 for preventing erroneous erasure of recorded data are, as shown in FIGS. 13 and 14, a detection light transmitting window 52.15 formed in the cartridge body 2.
53 is configured to open and close, and in the closed state (shape B in Fig. 13) writing and erasing cannot be performed, and in the open state (shape B in Fig. 13)
Writing and erasing are possible in the state shown in Figure 4).

As shown in FIG. 15, the accidental erasure prevention members 14 and 15 each include a main body 54 formed in a shape that allows detection light transmission windows 52 and 53 to be opened and closed, and a main body 54 that is protruded from one end of the main body 54. A first protrusion 55, a second protrusion 56 protruding from the other end of the main body 54, and a pair of elastic locking tongues 57, 57 protruding from the side of the main body 54. It is integrally molded from synthetic resin material.

When assembled into the cartridge main body 2, the main body portion 54 is positioned between the ribs 58 and 59 formed on the cover members 2a and 2b, and the first ribs 58 and 59 protrude from both ends. The second projections 55 and 56 are fitted into the detection light transmitting window 52 or 53, which is a long hole, and can be slid in the left and right directions in the figure.

Additionally, mortar-shaped locking step portions 60.60 are respectively protruded from the mutually opposing surfaces of the ribs 58, 59, and as shown in FIG. Claw part 5
7a, 57a are the one end portions 60a, 6 of the locking step portion 60.60.
0a, or as shown in FIG. 14, the tip claws 57a-, 57a of the pair of elastic locking tongues 57.57 catch on the other ends 60b, 60b of the locking step 60.60, and the movement is now regulated.

Further, an operating body insertion recess 61 is formed in the second protrusion 56, and a switching operation can be performed only by inserting a rod-shaped operating body 62 into this operating body insertion recess 61 and sliding it. This prevents it from being moved carelessly.

Further, the accidental erasure prevention members 14 and 15 are attached in opposite directions so that the operation body insertion recess 61 is not located on the same side of the cartridge body 2, so that the accidental erasure prevention members 14 and 15 are installed in opposite directions to each other so that the operation body insertion recess 61 is not located on the same side of the cartridge body 2. You can check if it is there.

In addition, when switching the erroneous erasure prevention member 14.15, the tip claw portion 57 of the pair of elastic locking tongues 57.57 is pressed.
The completion state of switching can be confirmed by the sound generated when a, 57a gets over the locking step portion 60.60.

Further, since the pin 40 as a locking member is arranged at a position where the arm portion 20c of the torsion spring member 20 does not touch it slightly, the movement of the shutter 5 is not hindered, and good movement of the shutter 5 is maintained. becomes possible.

[Effects of the Invention] As explained above, the present invention is made by overlapping two cover members, houses an information storage medium therein, and has an opening for performing information processing on the information storage medium. For information storage media, the information storage medium has a cartridge body, a shielding member that is slidably attached to the cartridge body and opens and closes the opening, and a biasing means that constantly biases the shielding member to close the opening. In the cartridge, the biasing means has a winding part in the middle part, and a locking part formed at the tip of the arm part at one end is engaged with an engagement recess formed in the cover member, and the urging means is arranged at the tip of the arm part at the other end. comprising a torsion spring member that is attached with the formed locking portion engaged with a spring fixing portion of the shielding member, and
A guide wall for guiding the winding portion is formed on the cover member, and a locking member for locking the torsion spring member is arranged. Therefore, in a cartridge in which a torsion spring member is used to constantly bias the shielding member to the fully open position, the torsion spring member can be held in a state where it is prevented from opening more than necessary during assembly, and this work can be performed extremely easily. It has the effect of improving assembly efficiency.

[Brief explanation of the drawing]

The drawings show a practical example of the present invention; FIG. 1 is an external perspective view of the shutter in the closed state, FIG. 2 is an external perspective view of the shutter in the open state, FIG. 3 is a vertical side view of the shutter, and FIG. The figure is the second
Figure 5 is a cross-sectional view taken along the line v-v in Figure 1, Figure 6 is a plan view showing how the shirt closure spring is installed, and Figure 7 is the side opening. , FIG. 8 is a perspective view showing the rear part of the cartridge, and FIG. 9 is a perspective view showing the rear part of the cartridge.
10 is a schematic plan view showing a recess formed on one side of the cartridge, FIG. 11 is a schematic perspective view showing the cartridge stored in the autochanger, and FIG. 12 is a cover. 13 and 14 are plan views showing different switching states of the erroneous erasure prevention member, and FIG. 15 is a side view of the erroneous erasure prevention member. DESCRIPTION OF SYMBOLS 1... Cartridge for information storage medium, 2... Cartridge body, 3... Information storage medium (optical disk), 4
... opening, 5 ... shielding member (shutter), 13.
・・Spring fixing part (spring fixing plate for shirt closure), 2
0...Biasing means (torsion spring member for shutter closing), 20
a... Winding part, 20b, 20C/71m part, 30
．． 31... Guide wall (rib), 33... One end locking part, 34... Symbol recess, 35... Other end locking part, 4o.
...Locking member (bottle). Applicant's Representative Patent Attorney Takehiko Suzue Figure 3 #44 Figure 5 Figure 7 Figure 4b Figure 8 #! Figure 9 Figure 11

Claims (4)

[Claims] (1) A cartridge body made by overlapping two cover members and having an opening for storing an information storage medium therein and performing information processing on the information storage medium, and a cartridge body that is slidably attached to the cartridge body. An information storage medium cartridge comprising a shielding member that opens and closes the opening, and a biasing means that constantly biases the shielding member to close the opening,
The biasing means has a winding part in the intermediate part, and a locking part formed at the tip of the arm part at one end is engaged with an engagement recess formed in the cover member, and the other end is formed at the tip of the arm part. The locking portion is configured with a torsion spring member that is attached while being engaged with the spring fixing portion of the shielding member, and the cover member is formed with a guide wall that guides the winding portion, and the torsion A cartridge for an information storage medium, characterized in that a locking member for locking a spring member is disposed. (2) An information storage medium according to claim 1, characterized in that the other end arm portion having the other end locking portion of the torsion spring member is arranged at a position where the other end arm portion does not touch the other end portion slightly. cartridge. (3) The information storage medium cartridge according to claim 1, wherein the guide wall is composed of a rib that is integrally provided on the cover member. (4) The cartridge for an information storage medium according to claim 1, wherein the locking member comprises a boss that projects integrally with the cover member.