JP3384763B2 - Disk 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 disc cartridge containing a disc-shaped signal recording medium such as an optical disc, a magnetic disc and a magneto-optical disc.

[0002]

2. Description of the Related Art Conventionally, in an optical disc player for optically recording and reproducing signals for an optical disc or a magneto-optical disc, as shown in FIG. 11, the disc is mounted on a flat rectangular parallelepiped cartridge body (90). A disc cartridge (9) accommodating (91) is used, and the disc cartridge is inserted into the apparatus from a cartridge insertion opening (11) opened in the cabinet (1) of the disc player.
By loading (9), it is possible to record and reproduce signals.

FIGS. 9A and 9B show a disk cartridge 9
(G11B2 [Japanese Patent Laid-Open No. 5-198121 [G11B2
3/03]), a window (100) for exposing the signal surface of the disc (91) is opened in the cartridge body (90), and a shutter (92) for opening and closing the window (100) is slid. It is movably attached. Inside the cartridge body (90), a lock member (93) for locking the shutter (92) in the closed position is arranged along the side end surface (9a) extending in the sliding direction of the shutter (92). There is. The lock member (93) is
It is elastically displaceable around the base end, and an engaging recess (95) is formed at its tip. Also, the lock member
An inclined surface (99) that should function when unlocking is formed at the tip of the (93) as described later.

On the other hand, the shutter (92) is provided with an engagement piece which can be engaged with the engagement recess (95) of the lock member (93) at a sliding contact portion with the side end surface (9a) of the cartridge body (90). (96) is projected. Further, a spring locking piece (98) is provided on the shutter (92) in a protruding manner, and a torsion spring (94) is interposed between the spring locking piece (98) and the cartridge main body (90) to allow the shutter ( 92) is biased in the closing direction.

Usually, in the disc cartridge (9), the engagement recess (95) of the lock member (93) and the engagement piece (96) of the shutter (92) are engaged with each other, and the shutter (92) is Locked in closed position. When the disc cartridge (9) is inserted into the rear part of the device through the cartridge insertion opening provided in the cabinet of the optical disc player, as shown in FIG.
Along with the forward movement of the disk cartridge (9) indicated by the arrow A, the unlocking piece (97) is provided at the back of the device.
Moves in the direction opposite to the arrow A, enters the cartridge body 90 as shown in the drawing, and slides into the lock member 93 to elastically displace the lock member 93.

As a result, the engaging recess (95) of the lock member (93)
Is released from the engaging piece (96) of the shutter (92),
The lock of (92) is released. Then, as the disc cartridge (9) further moves forward and reaches the recording / reproducing position at the back of the device, the lock release piece (97) resists the elasticity of the torsion spring (94) as shown in FIG. Then press the shutter (92) to open it. In this state, the cartridge body (90)
A signal is recorded or reproduced through the window (100).

Thereafter, in the ejecting operation of the disk cartridge (9), the unlocking piece (97) relatively moves in the direction of arrow A along with the backward movement of the disk cartridge (9), and the closing direction of the shutter (92). Is allowed to move.
Therefore, the shutter (92) is biased by the torsion spring (94) and is closed as shown in FIG. 9 (a). Also, when the shutter (92) is closed, the lock release piece (97) is locked by the lock member.
The lock member (93) is elastically displaced in the unlocking direction by sliding contact with the slope (99) of the (93). As a result, at the closed position of the shutter (92) shown in FIG. 9 (a), the engaging recess of the lock member (93) is
(95) and the engagement piece (96) of the shutter (92) face each other in the non-engaged state. Then, the disc cartridge (9) further moves backward and is pulled out from the cartridge insertion port, whereby the lock releasing piece (97) is detached from the lock member (93). As a result, the lock member (93) elastically returns to engage the engagement recess (95) of the lock member (93) and the shutter.
The engagement piece (96) of (92) is engaged with each other, and the shutter (92) is locked at the closed position.

In response to the recent demand for miniaturization of the disc player, the disc cartridge has been required to have a higher recording density and a smaller diameter, and accordingly, the cartridge shown in FIG. 9 (b). Side face of body (90)
The distance S between the outer peripheral edge of the disk (91) and the disk (91) needs to be designed as small as possible.

[0009]

By the way, the disc cartridge (9) is provided with a window (100) formed in the cartridge body (90) to prevent foreign matter from entering the disc housing space. In addition to having a structure in which the periphery is substantially sealed, a rib ((90d) in FIG. 10) surrounding the disk accommodating space is provided so as to project therein. Specifically, as shown in FIG. 10, the cartridge main body (90) is constructed by integrating a pair of case halves (90a) (90b) by ultrasonic bonding. When assembling the disc cartridge (9), After incorporating components such as discs inside the pair of case halves (90a) and (90b), the process of joining both case halves (90a) and (90b) to each other and finally attaching the shutter (92) is adopted. Has been done.

However, since one end of the torsion spring (94) needs to be locked to the spring locking piece (92a) of the shutter (92), the pair of case halves (90a) (90b) are joined together. It is difficult to assemble the cartridge body (90) in advance, and it is advantageous in the process to mount the shutter (92) on the cartridge body (90) after joining and then to assemble the cartridge body (90) inside. In this case, the cartridge body (90) has
Open to insert the torsion spring (94) as shown in 0
It becomes necessary to open (90c).

However, the opening (9
Due to the formation of 0c), there is a risk that foreign matter may enter the accommodation space of the torsion spring (94) through the opening (90c). When foreign matter enters, there is a problem that the elastic displacement of the torsion spring (94) is hindered and the opening and closing of the shutter (92) is hindered.

Therefore, an object of the present invention is to provide a disk cartridge which is easy to assemble and which is free from the possibility of foreign matter entering the inside of the cartridge body.

[0013]

A disk cartridge according to the present invention comprises a flat rectangular parallelepiped cartridge body (20) in which a disk-shaped signal recording medium is rotatably housed, and the cartridge body (20) comprises: At least one window for exposing the signal surface of the signal recording medium is opened, and
A shutter (3) for opening and closing the window is slidably attached, and the shutter (3) is biased in a closing direction by a spring member. The cartridge body (20) has an opening (24) for incorporating a spring member inside the cartridge body (20).
Is opened, and the opening (24) is closed by a lid member.

In the disk cartridge of the present invention, the cartridge body (20) has the opening (24) for incorporating the spring member into the cartridge body (20). After assembly and mounting the shutter (3), the spring member can be incorporated through the opening (24). Finally, a lid member is attached to the cartridge body (20) to close the opening (24). Therefore, the assembly process of the disc cartridge is simple,
There is no risk of foreign matter entering through the opening (24) after assembly.

Specifically, the lid member (5) can be formed into a strip plate shape corresponding to the shape of the opening (24). Further, the lid member (5) has a slit (51) for avoiding interference with a spring locking piece (31) projecting from the shutter (3) to lock one end of the spring member. ), You can open and close the shutter without any problem.

In a more specific structure, the cartridge body (20) is provided with an insertion opening (25) for inserting the lid member in a side wall orthogonal to the side wall in which the opening (24) is formed. A holding mechanism for holding the lid member at a predetermined position is provided at the inner part of the insertion opening (25). According to the specific structure, the lid member (5) is inserted from the insertion opening (25) of the cartridge body (20).
By inserting, the lid member (5) can be attached at a predetermined position and the opening (24) of the cartridge body (20) can be closed. Therefore, it is possible to attach the lid member (5) with a small number of parts.

In another specific configuration, the cartridge body (20) is integrally provided with a spring plate portion (63) serving as the spring member and a lid portion (7) serving as the lid member. Element
(6) is attached, and the lid portion (7) is formed in a strip plate shape corresponding to the shape of the opening (24). According to the specific configuration,
Since the spring member and the lid member are integrated, the number of parts can be further reduced. Where the leaf spring member
The lid (7) of (6) has a slit (72) for avoiding interference with a spring locking piece (31) projecting from the shutter (3) to lock one end of the spring member. ), You can open and close the shutter without any problem.

In a more specific structure, the leaf spring member (6)
Is formed in a shape that can be inserted from the opening (24) of the cartridge body (20).
A holding mechanism for holding (6) at a predetermined position is provided.
According to the specific configuration, the leaf spring member can be made with a small number of parts.
(6) can be attached.

[0019]

According to the disk cartridge of the present invention, since the spring member can be installed through the opening formed in the cartridge body, the disk cartridge can be easily assembled. Since the opening is closed by the lid member, there is no risk of foreign matter entering the inside of the cartridge body.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment in which the present invention is applied to a disk cartridge as shown in FIG. 11 will be specifically described with reference to the drawings. The description of the same structure as the conventional disk cartridge, such as a lock member that locks the shutter in the closed position, is omitted.

[0021]First embodiment As shown in FIGS. 1 and 2, the disc cartridge of the present embodiment.
(2) uses a pair of resin case halves (21) (22)
Flat cartridge body integrated by wave bonding
(20), and the cartridge body (20) has a sheet metal chassis.
The shutter (3) is slidably mounted. Also, car
How to close the shutter (3) inside the trunk body (20)
A torsion spring (4) that biases in the direction is built in,
The first tip portion (41) extending from the coil spring portion (43) has a shank.
It is locked in the recessed part (32) of the spring locking piece (31) protruding from the target (3).
On the other hand, the second tip portion (4) extending from the coil spring portion (43)
2) is locked to the inner wall of the cartridge body (20).

A torsion spring (4) is attached to the side wall of the cartridge body (20) with which the shutter (3) is in sliding contact with the cartridge body (20) in the process of assembling the disc cartridge (2).
There is an opening (24) for insertion into the
(24) is closed by a strip-shaped lid member (5). The lid member (5) has a slit (51) for avoiding interference with a spring locking piece (31) that moves with opening and closing of the shutter (3).
Is opened in the longitudinal direction. Also, the cartridge body
The side wall of (20) orthogonal to the side wall is provided with an insertion opening (25) for inserting the lid member (5) to a predetermined position where the opening (24) is closed.

Further, as shown in FIG. 3, the cartridge body (20) is provided with a pair of guide grooves (26) (26) for guiding the insertion movement of the lid member (5), and the insertion opening (25 ), The lid member (5) is ultrasonically bonded to the inner surface of the guide groove (26) and fixed at a predetermined position when the lid member (5) reaches the predetermined position as shown in FIG. To be done. Also, in the cartridge body (20), as shown in FIG. 4, at the position below the insertion port (25),
A convex portion (27) for locking the second tip portion (42) of the torsion spring (4) is formed.

In the process of assembling the disc cartridge (2), the pair of case halves (21) and (22) are integrated by ultrasonic bonding in a state where all the constituent members except the torsion spring (4) are accommodated, After attaching the shutter (3), the torsion spring (4) is inserted from the opening (24) of the cartridge body (20), and the first tip (41) is attached to the spring locking piece (31) of the shutter (3). ) Is locked in the recess (32) while the second tip
(42) is locked to the convex portion (27) of the cartridge body (20)
(Figure 1). And finally, the insertion opening of the cartridge body (20)
The lid member (5) is inserted from (25), and at the position where the opening (24) is closed, the lid member (5) is ultrasonically welded to the cartridge body.
Fix it to (20) (Fig. 2).

According to the disc cartridge (2),
Since the opening (24) is formed in the cartridge body (20), it is easy to install the torsion spring (4), and the opening (24) is a lid member after the torsion spring (4) is installed.
Since it is closed by (5), there is no risk of foreign matter entering the accommodation space of the torsion spring (4). A slit (51) is formed in the lid member (5), but since the slit (51) has an extremely narrow width that allows the spring locking piece (31) to pass therethrough, a torsion spring is used. There is no problem because the invasion of foreign matter that would hinder the elastic displacement of (4) is prevented.

Further, according to the disc cartridge (2), parts such as screws for fixing the lid member (5) are not required, so that the number of parts is small and the lid member (5) is often mounted. No man-hour is required.

[0027]Second embodiment As shown in FIGS. 5 and 6, the disc cartridge of the present embodiment.
The case (2) consists of a pair of case halves (21) (22).
The leaf spring member (6) is assembled inside the cartridge body (20)
It is embedded. The leaf spring member (6) is attached to the cartridge body (2
Spring plate having a width slightly smaller than the width of the opening (24) of (0)
By bending the material as shown, it has a V shape.
The spring plate part (63) and the strip-shaped lid part (7) are integrally formed.
The spring plate (63) closes the shutter (3).
A spring member that biases in the direction
A lid member that closes the opening (24) of the bag body (20) is configured.

The tip portion (6) of the spring plate portion (63) of the leaf spring member (6) is
1) is locked in the recess (32) of the spring locking piece (31) of the shutter (3), while the bent part (62) of the leaf spring member (6) is engaged with the inner wall of the cartridge body (20). It has been stopped.

A torsion spring (4) is attached to the side wall of the cartridge body (20) with which the shutter (3) is in sliding contact with the cartridge body (20) in the process of assembling the disc cartridge (2).
There is an opening (24) for insertion into the
(24) is closed by the lid portion (7) of the leaf spring member (6). The lid (7) of the leaf spring member (6) is provided with a slit (72) in the longitudinal direction for avoiding interference with the spring locking piece (31) that moves when the shutter (3) is opened and closed. Has been done.

The cartridge body (20) is shown in FIGS.
As shown in, the leaf spring member is projected toward the opening (24).
A pair of protrusions for holding both sides of the lid (7) of (6) from above and below
(28) (29) are formed at a plurality of locations. Further, as shown in FIG. 8, a leaf spring member is provided on the inner wall of the cartridge body (20).
A recess (23) for locking the bent portion (62) of (6) is formed. On the other hand, on both sides of the lid portion (7) of the leaf spring member (6), as shown in FIG.
Notches (71) through which the projecting pieces (28) can pass are recessed at a plurality of locations corresponding to (28).

When assembling the leaf spring member (6) to the cartridge body (20), first, the spring leaf portion (6) of the leaf spring member (6) is
3) Insert the inside of the cartridge body (20), and
The tip portion (61) of (63) is locked in the recess (32) of the spring locking piece (31) of the shutter (3). Then, the lid portion of the leaf spring member (6)
By matching the position of each notch (71) of (7) with the position of each projecting piece (28) of the cartridge body (20), a leaf spring member is formed.
The lid portion (7) of (6) is dropped to a height position sandwiched by a pair of projecting pieces (28) and (29), and the leaf spring member (6) is slid in this state, and the leaf spring member (6) is slid. The bent portion (62) is engaged with the concave portion (23) shown in FIG. As a result, the leaf spring member (6) is shown in FIG.
As shown in FIG. 5, the cartridge body (20) is held at a predetermined position with the opening (24) closed. After that, leaf spring member
Both sides of the lid portion (7) of (6) are ultrasonically bonded to the inner surface of the cartridge body (20), if necessary.

According to the disc cartridge (2),
Since the opening (24) is opened in the cartridge body (20), it is easy to assemble the leaf spring member (6), and even after the leaf spring member (6) is incorporated, the opening (24) has a lid ( Since it is closed by 7), there is no risk of foreign matter entering the accommodation space of the leaf spring member (6). Further, according to the disc cartridge (2), the spring plate portion (63) for urging the shutter (3).
And the lid portion (7) that closes the opening (24) are formed by an integral leaf spring member (6), and no parts such as screws are needed to fix the lid member (5). The number of parts is small, and the leaf spring member (6) can be attached with a small number of steps.

The configuration of each part of the present invention is not limited to the above-described embodiment, and various modifications can be made within the technical scope described in the claims. For example, the lid member (5) shown in FIG. 1 can be held in the cartridge body (20) by the holding mechanism shown in FIG.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a first embodiment of a disk cartridge according to the present invention.

FIG. 2 is a perspective view showing a step of inserting the lid member into the inside of the cartridge body in the first embodiment.

FIG. 3 is a partially cutaway rear view showing a holding mechanism provided in the cartridge body in the first embodiment.

FIG. 4 is a cross-sectional view showing a locking portion of a torsion spring formed in the cartridge body in the first embodiment.

FIG. 5 is a perspective view showing a main part of a second embodiment of a disc cartridge according to the present invention.

FIG. 6 is a perspective view showing a step of assembling the leaf spring member inside the cartridge body in the second embodiment.

FIG. 7 is a partially cutaway rear view showing a holding mechanism provided in the cartridge body in the second embodiment.

FIG. 8 is a cross-sectional view showing an engaging portion of a leaf spring member formed in the cartridge body in the second embodiment.

FIG. 9 is a side view showing a state (a) in which the shutter is closed and a state (b) in which the shutter is open in the conventional disc cartridge.

FIG. 10 is a perspective view showing a main part of a disc cartridge having an opening formed in the cartridge body.

FIG. 11 is a perspective view showing how a disc cartridge is loaded into a cabinet of a disc player.

[Explanation of symbols]

(2) Disk cartridge (20) Cartridge body (21) Case half (22) Case half (24) Open (25) Insertion port (26) Guide groove (3) Shutter (31) Spring locking piece (4) Torsion spring (5) Lid member (51) Slit (6) Leaf spring member (63) Spring plate part (7) Lid (71) Notch (72) Slit (28) Projection piece Protrusion

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takaya Uemura 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Denki Co., Ltd. (72) Makoto Takahashi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka No. 5 within Sanyo Electric Co., Ltd. (56) Reference JP-A-6-267226 (JP, A) JP-A-8-96547 (JP, A) Actual exploitation Sho-63-55267 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) G11B 23/03 605

Claims (3)

(57) [Claims] 1. A cartridge body (20) having a flat rectangular parallelepiped shape.
The disk-shaped signal recording medium is rotatably accommodated in
At least one window for exposing the signal surface of the signal recording medium is opened in the cartridge body (20), and a shutter (3) for opening and closing the window is slidably attached to the cartridge body (20). ) Is a disc cartridge urged in the closing direction by a spring member, the cartridge body (20) is provided with an opening (24) for incorporating the spring member, a spring plate portion (63) and a lid. A leaf spring member (6) integrally provided with the portion (7) is attached, and the lid portion (7) is formed into a strip plate shape corresponding to the shape of the opening (24). Disk cartridge. 2. The cover (7) of the leaf spring member (6) is provided with a spring locking piece (31) projecting from the shutter (3) for locking one end of the spring member. The disk cartridge according to claim 1, wherein a slit (72) for avoiding interference is opened. 3. The leaf spring member (6) comprises a cartridge body (2
The cartridge main body (20) is provided with a holding mechanism for holding the leaf spring member (6) at a predetermined position, the holding mechanism being formed in a shape that can be inserted from the opening (24) of (0). The disk cartridge described in.