JPH06267226A - Disk cartridge and its assembling method - Google Patents

Abstract

PURPOSE:To prevent dust and foreign matter from intruding into the cartridge from the outside by providing a shutter mechanism for opening and closing a motor opening hole and a head opening hole. CONSTITUTION:The disk cartridge has a cartridge case 2 for freely rotatably housing a disk 1 in a housing part. This cartridge case 2 is composed of an upper half 4a and a lower half 4b, and is approximately cubic. The upper half 4a and the lower half 4b are fixed by set screws 5 at four corners respectively. The upper half 4a and the lower half 4b have the motor opening holes 6a and 6b for inserting a motor, the head opening holes 7a and 7b for inserting a head and recessed parts 8a and 8b opposite to each other respectively. A shutter 9 is inserted into the recessed parts 8a and 8b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cartridge for accommodating a disc-shaped information recording medium used in an information storage device such as a data file device and an image file device, and a method of assembling the disc cartridge.

[0002]

2. Description of the Related Art Write-once or rewritable optical disks are used by being housed in a cartridge to protect them from dust. An example of this type of cartridge that has been conventionally used is disclosed in Japanese Patent Laid-Open No. 61-236083 (US Pat.
680662). This cartridge
Description will be made with reference to FIGS. 14 and 15.

As shown in FIG. 14, this cartridge has a cartridge housing 52 for rotatably housing a disk 51. The cartridge housing 52 is composed of an upper half 53a and a lower half 53b, and has a substantially rectangular parallelepiped shape. Upper half 53a and lower half 53
b is motor opening holes 54a and 54b (54b, see FIG. 15) for inserting the disk motor, respectively.
Head opening holes 55a, 55b for inserting the head
(See FIG. 15 for 55b.). Upper half 53
The a and the lower half 53b have concave portions 56a and 56b (56b, see FIG. 15) facing each other. The recesses 56a and 56b are provided in the shutter 6 which will be described later.
It has a guide groove 57 for zero.

The cartridge further includes a U-shaped shutter 60 for opening and closing the motor opening holes 54a and 54b and the head opening holes 55a and 55b. The shutter 60 has a protrusion 61 and a claw 62. The protruding piece 61 is inserted into the guide groove 57 of the recesses 56a and 56b. This causes the shutter 60 to move to the upper half 53a.
The concave portion 56 so that the lower half 53b and the lower half 53b are sandwiched.
a, 56b. At this time, the shutter 60
Are movable in the directions indicated by arrows K and L.
The claw 62 can be inserted into an elongated opening 58 formed when the upper half 53a and the lower half 53b are overlapped.

Inside the cartridge housing 52, FIG.
As shown in, a guide groove 66 is formed in the end face portion near the head opening holes 55a and 55b. The guide groove 66 is bent 90 degrees in an arc shape and is connected to an opening groove 59 (see FIG. 14) formed on the outer surface of the cartridge housing 52. A flexible slider 63 is movably held in the guide groove 66. The slider 63 has an engagement hole 64 at the center. The claws 62 of the shutter 60 are inserted into the engagement holes 64, whereby the shutter 6
0 is connected and fixed to the cartridge housing 52 via the slider 60. Further, the slider 63 has a projection 65 at the end portion thereof located on the opening groove 59 side of the cartridge housing 52. The projection 65 engages with the shutter opener member of the cartridge holder in the drive device to allow the slider 63 to move.

Further, the tension spring 6 is provided in the gap between the slider 63 and the disk housing portion 68 of the cartridge housing 52.
7 is arranged to be expandable and contractible. One end of the tension spring 67 is at the center of the slider 63, and the other end is at the cartridge housing 5.
Locked to 2. As a result, the tension spring 67 urges the shutter 60 in the direction indicated by the arrow L so that the shutter 60 closes the motor opening holes 54a and 54b and the head opening holes 55a and 55b. Therefore, when the shutter opener member is inserted into the opening groove 59, the protrusion 65 contacts the shutter opener member, and the shutter 60 opens the motor opening holes 54a and 54b and the head opening holes 55a and 55b as indicated by the arrow K. Move in the direction.

The assembly of this cartridge will be described. The disk 51 is installed in the disk storage portion 68 of the lower half 53b, and the slider 63 is inserted into the guide groove 66. Then, one end of the tension spring 67 is locked to the lower half 53b side and the other end is locked to the slider 63. While maintaining this state, the upper half 53a is superposed on the lower half 53b and fixed by screws or the like to form the cartridge housing 52,
Finally, the shutter 60 is attached to the slider 63 to complete the cartridge.

Next, as a second conventional example, a cartridge conforming to the international standard of 90 mm optical disk is shown in FIG.
It will be described based on.

As shown in the figure, the cartridge 72 is slidably slidable inside a cartridge housing 71.
The shutter 73 is fixed to the slider 72. The cartridge housing 71 has an opening 74 in the front surface thereof into which the torsion coil spring 75 can be inserted. The torsion coil spring 75 is inserted from the opening 74, one end of which is locked to the cartridge housing 71 and the other end of which is locked to the slider 72, and gives a biasing force to the slider 72.

[0010]

However, the cartridge of the first conventional structure as described above has the following problems. First, the assembly of the cartridge is very difficult. This is for the following reason. At the time of assembling the cartridge, the tension spring 67 must be in a tensioned state, that is, with the slider 63 being biased, the upper half 53a must be superposed on the lower half 53b. In this state, the slider 63 moves the lower half 53
Since it is guided only by the guide groove 66 of b, the degree of freedom is large, and the slider 63 is easily separated from the lower half 53b. For example, when a slight impact is applied to the lower half 53b when the upper half 53a is overlaid on the lower half 53b, the slider 63 and the tension spring 67 vigorously come off the lower case 53b and scatter. Secondly, there is a problem that the spring 67 or the slider 63 thus scattered collides with the disk 51 housed in the lower case 53b and damages the disk 51. Thirdly, such a structure is not suitable for downsizing the cartridge. this is,
This is because a space for moving the tension spring 67 is required inside the cartridge housing 52, and the depth of the cartridge becomes long.

On the other hand, in the second conventional configuration, the assembly of the cartridge is relatively easy, but since the opening 74 is not closed in the completed cartridge, foreign matter enters from the opening 74 and the shutter 73 is opened and closed. May cause trouble. Further, since the torsion coil spring 75 can be seen from the outside of the cartridge housing 71, it may be easily removed and the function of the cartridge may be impaired.

The present invention has been made in order to solve the above-mentioned problems of the prior art. It is possible to reduce the size, and the opening is closed in the completed state, so that it is unlikely to be affected by dust or the like. An object of the present invention is to provide a highly reliable disc cartridge and a method for assembling the disc cartridge.

A further object of the present invention is to provide a disk cartridge which is easy to assemble and does not damage the disk in the assembly process, and a method for assembling the disk cartridge.

[0014]

DISCLOSURE OF THE INVENTION A disk cartridge according to the present invention is a disk cartridge for rotatably storing a disk therein, and is composed of an upper half and a lower half for driving the disk to rotate. , A cartridge housing having a motor opening hole into which the motor can be inserted, a head opening hole into which a recording / reproducing head can be inserted, and a window portion on a side wall, and movably attached to the cartridge housing, at least the head opening. A shutter for opening and closing the hole, and a shutter connected to the shutter, slidably guided inside the cartridge housing so that the shutter can move in the direction of opening and closing the head opening hole, and the window portion. A slide member for covering and the window portion can be passed through, and the inside of the cartridge casing has one end and the cartridge casing has one end. The other end is engaged with the slide member, said shutter has an elastic member for urging in a direction of closing the head opening hole, the above-mentioned object can be achieved by its.

The slide member is movably guided to a slider located on one side wall portion of the cartridge housing and a guide groove provided across two side wall portions including the one side wall portion sandwiching a corner of the cartridge housing. In some cases, one end may be provided with an opener belt joined to the slider.

The slider has a protrusion, and the opener belt has a fitting hole. The slider and the opener belt are joined by the protrusion engaging with the fitting hole. There are also cases.

The shutter may cover a region where the slider and the opener belt are joined.

The width of the opener belt may be narrower than the width of the window in the vicinity of the joint with the slider.

The slider has at least two protrusions, the opener belt has at least one through hole at one end thereof, and the shutter has at least two holes. At least two protrusions are included in the at least one of the opener belts.
The shutter and the slide member may be connected to each other by fitting the at least two holes of the shutter through one fitting hole.

The window portion may have an opening portion into which the opener belt can be inserted.

The elastic body may be a torsion coil spring. Further, the disc cartridge assembling method of the present invention is a cartridge casing having a motor opening hole into which a motor for rotationally driving a disk can be inserted, a head opening hole into which a recording / reproducing head can be inserted, and a window portion on a side wall. A step of mounting a disc on one of the upper half and the lower half of the body;
Inserting a sladder into a first guide groove provided in the side wall portion, and inserting an opener belt into a second guide groove provided across two side wall portions including the one side wall portion while sandwiching the corner of the one half. And a step of stacking the one half on which the disc, the slider and the opener belt are mounted and the other half of the upper half and the lower half to form the cartridge housing. And a step of inserting an elastic body into the inside of the cartridge housing through the window portion of the cartridge housing, locking one end of the elastic body to the cartridge housing and the other end to the slider, and the elastic body A step of joining one end of the slider and one end of the opener belt in a state where the slider is inside the cartridge housing, and a step of opening and closing at least the head opening hole in the slider. And includes a step of mounting the coater, the objects can be achieved.

Further, according to the method of assembling the disk cartridge of the present invention, a motor opening hole into which a motor for rotationally driving the disk can be inserted, a head opening hole into which the recording / reproducing head can be inserted, and an opening portion on the side wall. A step of mounting a disk on one of the upper half and the lower half that composes a cartridge housing having a window portion including the first half, and a first guide groove provided on one side wall of the one half. A step of inserting a sladder into the cartridge, and a step of superposing the one half on which the disc and the slider are mounted and the other half of the upper half and the lower half to form the cartridge housing. And an elastic body is inserted into the cartridge housing through the window portion of the cartridge housing, and one end of the elastic body is locked to the cartridge housing and the other end is locked to the slider. With the elastic body inside the cartridge housing, the opener is passed through the opening to a second guide groove provided across two side wall portions including the one side wall portion with the corner of the one half sandwiched therebetween. Including a step of inserting a belt, a step of joining one end of the slider and one end of the opener belt, and a step of attaching a shutter for opening and closing at least the head opening hole to the slider, Thereby, the above object is achieved.

The slider has a projection, and the opener belt has a fitting hole. The step of joining the slider and the opener belt is carried out by engaging the projection with the fitting hole. It may be done.

The opener belt has an inclined portion that becomes thinner toward the front end portion and a flat surface portion that follows the inclined portion, and the fitting hole of the opener belt is formed in the flat surface portion. The second guide groove with the protrusion of the slider engaged with the fitting hole of the opener belt in a state where the inclined portion of the opener belt is in contact with the upper surface of the protrusion of the slider. It may be performed by moving along.

The opener belt has a flat surface portion near the end portion joined to the slider, which is narrower than the width of the window portion of the cartridge housing, and is rotatable. There is a case where the elastic body is inserted into the cartridge housing through the window portion while being protruded from the cartridge housing to the outside.

The slider has at least two protrusions, the opener belt has at least one through hole at one end thereof, and the shutter has at least two holes. At least two protrusions on the at least one of the opener belts;
In some cases, the shutter and the slider are joined to each other by being fitted into the at least two holes of the shutter through one fitting hole.

The shutter may be attached so as to cover a region where the slider and the opener belt are joined.

The elastic body may be a torsion coil spring.

[0029]

With the above construction, in the disc cartridge of the present invention, the window portion of the disc cartridge is covered with the slide member to form a hermetically sealed structure, so that a stable shutter opening / closing operation can be obtained without dust or foreign matter from entering from the outside. To be Further, since the structure is such that the torsion coil spring cannot be removed from the outside of the cartridge, there is no risk of accidentally removing the torsion coil spring and impairing the function of the cartridge, and the reliability is high. Further, as compared with the conventional opener belt type cartridge using the tension spring, the moving space of the tension spring is unnecessary, so that the depth can be shortened and it is suitable for downsizing.

Further, in the disc cartridge and the assembling method thereof according to the present invention, since the torsion coil spring can be inserted after the upper half and the lower half are superposed on each other, the constituent parts of the cartridge are not scattered during the assembling of the cartridge. The cartridge is easily assembled. Further, since the scattered parts do not collide with the disc during the assembly of the cartridge, the disc is not damaged and its effect is great.

It is preferable that the opening of the cartridge housing side wall is provided with an opening into which the opener belt can be inserted and the opening is covered by the opener belt within the movement range of the shutter. Insertion and locking work of the torsion coil spring can be done without the belt. After that, since the opener belt is inserted along the opener belt guide groove, the assemblability of the cartridge is further improved, and the reliability is further improved without damaging the opener belt.

[0032]

EXAMPLES Examples of the present invention will be described below.

(Embodiment 1) First, the construction of the cartridge of Embodiment 1 will be described with reference to FIGS.

As shown in FIG. 1, the cartridge of the first embodiment has a cartridge housing 2 for rotatably housing the disk 1 in the housing portion 3. The cartridge housing 2 is composed of an upper half 4a and a lower half 4b, and is a substantially rectangular parallelepiped. The upper half 4a and the lower half 4b are fixed at their four corners with set screws 5. Upper half 4a
As shown in FIG. 2, the lower half 4b has motor opening holes 6a, 6b for inserting a motor, head opening holes 7a, 7b for inserting a head, and recesses 8a, 8b facing each other. Have. A shutter 9, which will be described later, can be inserted into the recesses 8a and 8b.

As shown in FIG. 1, the cartridge of this embodiment further includes motor opening holes 6a and 6b and a head opening hole 7.
It has a U-shaped shutter 9 for opening and closing a and 7b. The shutter 9 is inserted into the recesses 8a and 8b and is movable in the directions indicated by arrows A and B.
As shown in FIG. 2, the shutter 9 has a stop hole 10 for fixing the shutter 9 to a slider 11 described later.

As shown in FIG. 2, the cartridge of this embodiment further includes a slider 11, a torsion coil spring 15, and an opener belt 18. The shutter 9 is fixed to the slider 11 by a set screw 13 through the set hole 10. The slider 11 is guided by linear slider guide grooves 14a and 14b (see FIGS. 3 and 4) provided along the side surface 2a of the cartridge housing 2, and moves inside the cartridge housing 2 to release the shutter. 9
To move. As shown in FIGS. 4 to 6, one end of the torsion coil spring 15 is engaged with a spring engagement groove 16 formed in a corner portion of the lower half 4b, and the other end thereof is engaged with a spring engagement portion 17 of the slider 11. Therefore, in the torsion coil spring 15, the shutter 9 has the motor opening holes 6 a and 6 b and the head opening hole 7.
A biasing force in the direction indicated by arrow B in FIG. 1 is applied to the slider 11 so as to close a and 7b. Slider 11
As shown in FIG. 5, has a protrusion 12 for engaging with the opener belt 18 on the plane of its tip. The opener belt 18 has a strip shape and is formed of a flexible resin such as polyacetal. As shown in FIG. 5, the opener belt 18 is fitted to the slanted portion 20 that is thinned toward the tip portion at one end, and the projection 12 of the slider 11 that is formed on the flat portion that follows the slanted portion 20. And a dowel hole 19. The shutter 9 includes a protrusion 12 of the slider 11 and a fitting hole 1 of the opener belt 18.
9 is fixed so as to cover the fitting portion. Therefore, the shutter 9 sandwiches the opener belt 18 and the slider 1
Since it is fixed to 1, the opener belt 18 does not come off from the slider 11. Opener belt 18
Is guided to opener belt guide grooves 22a and 22b formed as a pair of grooves facing each other in the upper half 4a and the lower half 4b, as shown in FIGS. The opener belt guide grooves 22a and 22b are formed on the side surface 2b (see FIG. 1) of the cartridge housing 2 from inside the slider guide grooves 14a and 14b of the cartridge housing 2 through the corners of the cartridge housing 2. And extends along the open groove 23a. The opener belt 18 is
Further, as shown in FIG. 4 and FIG. 6, the other end has an opener protrusion 21 that can come into contact with a pawl for opening and closing a shutter provided in the drive device. This opener protrusion 21
Is configured to be exposed to the outside through the opening groove 23a. Therefore, when the pawl of the drive device is inserted into the opening groove 23a, the opener protrusion 21 comes into contact with the pawl, and the opener belt 18 moves in the direction indicated by the arrow C in FIG.

As shown in FIG. 1, the cartridge housing 2 has a second opening groove 2 provided facing the opening groove 23a.
With 3b. This allows the double-sided disc to be used. The cartridge housing 2 further has a window 2 on the side surface 2a.
Have 4. The window portion 24 is formed when the upper half 4a and the lower half 4b are overlapped with each other, and allows the torsion coil spring 15 to be inserted from the outside of the cartridge housing 2.

The operation of the disk cartridge constructed as described above will be described below with reference to FIG.

In the non-use state, the shutter 9 receives a biasing force in the direction indicated by the arrow B by the torsion coil spring 15 held by the slider 11, and closes the motor openings 6a, 6b and the head openings 7a, 7b. . Therefore, it is possible to prevent dust from entering through the motor openings 6a and 6b and the head openings 7a and 7b, and prevent damage to the optical disc 1 due to careless handling.

Next, when the disk cartridge is mounted in the drive device, the claw of the drive device contacts the opener protrusion 21 of the opener belt 18 and moves the opener belt 18 in the direction indicated by arrow C. Since the opener belt 18 and the slider 11 are fitted and fixed to each other, the slider 11 moves in the direction indicated by the arrow A by overcoming the biasing force of the torsion coil spring 15 as the opener belt 18 moves. Therefore, the shutter 9 also moves in the direction indicated by the arrow A, and the motor opening holes 6a, 6b.
The head opening holes 7a and 7b are opened so that the motor and the recording / reproducing head can be inserted. At that time, the window 24 of the cartridge housing 2 is always covered with the shutter 9 or the opener belt 18, so that no foreign matter accidentally enters from the outside or the torsion coil spring 15 is removed. When the disk cartridge is turned over and mounted in the drive device, the second claw of the drive device abuts on the opener protrusion 21 of the opener belt 18, and the aforesaid claw is opened so as not to come into contact with the cartridge housing 2. Since it is inserted into 23b, the same operation as described above can be performed and the double-sided disk can be used.

Next, the assembly of the disk cartridge of this embodiment will be described with reference to FIGS.

First, as shown in FIGS. 2 and 4, the disk 1 is placed in the storage portion 3 of the lower half 4b and the slider 11 is inserted.
Is inserted into the slider guide groove 14b, and the opener belt 18 is inserted into the opener belt guide groove 22b so that the opener protrusion 21 is exposed to the outside of the guide groove 23b. At this time, the torsion coil spring 15 is not inserted. After that, the upper half 4a shown in FIG. 3 is superposed on the lower half 4b, and is fixed by the set screw 5.

Next, as shown in FIG. 7, the slider 11
Is moved in the direction indicated by arrow B in the direction indicated by arrow A, the torsion coil spring 15 is inserted from the window 24 of the cartridge housing 2, and one end of the cartridge is inserted as shown in FIGS. 4 and 6. Spring hook groove 1 of housing 2
6, the other end is locked to the spring hooking portion 17 of the slider 11. And slider 11 or opener belt 1
8 is moved to bring the protrusion 12 of the slider 11 into contact with and press the inclined portion 20 of the opener belt 18 (see FIG. 5). Then, due to the flexibility of the opener belt 18, the protruding portion 12 of the slider 11 elastically deforms the inclined portion of the opener belt 18 and abuts and moves, and is fitted and fixed in the fitting hole 19.

Finally, the shutter 9 is screwed into the stopper hole 10 of the shutter 9 and screwed to the slider 11 to complete the assembly of the disk cartridge. At this time, the shutter 9 covers the engagement area between the slider 11 and the opener belt 18.

As described above, according to this embodiment, in the disc cartridge using the opener belt 18,
Since the torsion coil spring 15 is inserted after the upper half 4a and the lower half 4b are overlapped with each other, the components of the cartridge are not scattered during the assembly of the cartridge, and the assembly of the cartridge is very easy. Also,
Since the components scattered during the assembly of the cartridge do not collide with the disc 1, the disc 1 is not damaged. Also, the completed disc cartridge has a window 24
Is covered with the opener belt 16 to form a closed structure,
A stable opening / closing operation of the shutter 9 can be obtained without dust and foreign matter from the outside. Moreover, since the structure is such that the torsion coil spring 15 cannot be removed from the outside of the cartridge, there is no risk of accidentally removing the torsion coil spring 15 and impairing the function of the cartridge, and the reliability is high. Further, since the shutter 9 covers the engagement area between the slider 11 and the opener belt 18, the opener belt 18 does not come off from the slider 11 and the reliability is high. Further, as compared with the conventional opener belt type cartridge using the tension spring, the movement space of the tension spring is unnecessary, so that the depth can be shortened and it is suitable for downsizing.

(Embodiment 2) A disk cartridge according to Embodiment 2 of the present invention will be described with reference to FIG. Example 1 above
Constituent elements similar to those are denoted by the same reference numerals, and description thereof will be omitted.

As shown in the drawing, in the cartridge of this embodiment, the width of the flat portion 31 at the tip of the opener belt 18 made of a flexible material is made narrower than the width of the window portion 24 of the cartridge housing 2. The flat portion 31 can be pivotally moved so as to be able to enter and exit through the window portion 24. The flat portion 31 has a fitting hole 19 into which the protrusion 12 of the slider 11 is fitted.
The configuration of the other parts is similar to that of the first embodiment.

The advantages at the time of assembling with such a configuration will be described. Since the opener belt 18 is configured as described above, the tip end portion 31 of the opener belt 18 can be protruded from the window portion 24 during assembly.
As a result, the width of the window portion 24 can be made wider than that of the first embodiment, and the torsion coil spring 15 can be inserted more easily. Moreover, since the spring hooking groove 17 of the cartridge housing 2 can be easily seen from the outside of the cartridge housing 2,
The torsion coil spring 15 can be more easily locked in the spring hook groove 16. Further, when the slider 11 and the opener belt 18 are fitted and fixed to each other, the opener belt 1
Since the fitting hole 19 of No. 8 can be inserted into the protrusion 12 of the slider 11 from the fitting direction, it is not necessary to deform the opener belt 18. In this way, the disc cartridge can be assembled more easily than in the first embodiment.

(Embodiment 3) A disk cartridge according to Embodiment 3 of the present invention will be described with reference to FIG. Example 1 above
The same components as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, in the cartridge of this embodiment, the slider 11 has the first protrusion 3 on the side surface thereof.
2 and the fitting hole 19 of the opener belt 18 on the plane of the tip.
(See FIG. 8) and the second protruding from the fitting hole 19
And a protrusion 33 of The protrusions 32 and 33 are made of a thermally deformable material such as resin. The shutter 9 has a first protrusion 32 and a second protrusion 32 of the slider 11 on its side surface.
It has a hole 34 that fits into the protrusion 33 of the. The lengths of the first protrusion 32 and the second protrusion 33 are such that when the shutter 9 is attached to the cartridge housing 2, the first protrusion 32 and the second protrusion 33 of the slider 11 are shuttered. It has a length slightly protruding from the hole 34 of 9. The configuration of the other parts is the same as that of the second embodiment.

Next, the assembly of the cartridge of this embodiment will be described. The slider 1 is manufactured in the same procedure as in the second embodiment.
1 and the opener belt 18 are fitted and fixed, the first protrusion 32 of the slider 11 is inserted into the hole 34 of the shutter 9.
And the second protrusion 33 is inserted. The tips of the first protrusion 32 and the second protrusion 33 of the slider 11 slightly protrude from the hole 34 of the shutter 9. This first popped out
By thermally deforming the tips of the protrusion 32 and the second protrusion 33, the shutter 9 can be fixed to the slider 11, and the assembly is completed.

As described above, the protrusions 32, 33 for engaging with the opener belt 18 provided on the slider 11 are provided.
Since the shutter can also be used for fixing the shutter 9, the assembly of the cartridge can be simplified and the opener belt 18 does not come off from the slider 9. Thus, the cartridge of this embodiment is particularly effective when it is not necessary to disassemble the assembled cartridge.

(Embodiment 4) A disk cartridge according to Embodiment 4 of the present invention will be described with reference to FIGS. The same components as those in the first and second embodiments are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 10, in the cartridge of this embodiment, the window portion 24 of the cartridge housing 2 has an opening portion 41 on the corner side of the cartridge housing 2 that is slightly wider than the width of the opener belt 18. . This opening 41
Are edges 43a and 43b of the recesses 8a and 8b of the upper half 4a and the lower half 4b that regulate the movement amount of the shutter 9.
Located inside it along. Therefore, when the shutter 9 contacts the recesses 8a and 8b, the opener belt 18
Covers the opening 41 of the window 24. Upper half 4
a and the lower half 4b, as shown in FIGS. 11 and 12, at the corners where the opener belt 18 moves,
Steps 4 along the opener belt guide grooves 22a, 22b
2a and 42b respectively. This makes the upper half 4
The opener protrusion 21 of the opener belt 18 is configured to be able to pass through the space formed by the step portions 42a and 42b when the a and the lower half 4b are overlapped.

Next, the assembly of the disk cartridge of this embodiment will be described. First, place the disk 1 on the lower half 4b
Slider 11 into slider guide groove 1
4b (see FIG. 12), and then the upper half 4a is superposed on the lower half 4b and fixed by a set screw 5 as shown in FIG. The slider 11 is moved in the direction indicated by the arrow B, and the window portion 2 of the cartridge housing 2 is moved.
4 and a torsion coil spring 15 is inserted, and FIG.
As shown in FIG. 3, one end thereof is engaged with the spring engaging groove 16 of the cartridge housing 2 and the other end thereof is engaged with the spring engaging portion 17 of the slider 11.

Next, the slider 11 is inserted through the opening 41 of the window 24 into the guide grooves 22a and 22b for the opener belt. At that time, the opener protrusion 21 of the opener belt 18 passes through the space formed by the step portions 42a and 42b and is guided into the guide groove 23a of the cartridge housing 2. Then, the slider 11 or the opener belt 18 is moved, and the fitting hole 19 of the opener belt 18 is inserted into the protrusion 12 of the slider 11 from the fitting direction and fixed.

Finally, the shutter 9 is screwed into the stopper hole 10 of the shutter 9 and screwed to the slider 11 to complete the assembly of the disk cartridge.

As described above, in the disc cartridge of this embodiment, when the torsion coil spring 15 is inserted from the outside, the opener belt 18 is not provided, so that the torsion coil spring 15 can be inserted more easily and the cartridge housing 2 can be spring-loaded. The locking in the groove 17 becomes easy. Further, in the form of the cartridge housing 2 in which the guide grooves 22a and 22b function as the guide grooves for the opener belt, the opener belt 18 is connected to the guide grooves 22a and 22 for the opener belt.
Can be inserted along b. Therefore, as compared with a method of inserting the guide groove 22b of the upper half 4b into the opener belt 18 with the opener belt 18 fitted in the guide groove 22a of the lower half 4b, the opener belt can be easily assembled without damaging the opener belt. . Moreover, when the shutter 9 is attached to the slider 11, the opener belt 18 moves so as to always cover the opening 41 of the window portion 24, so that the opener belt 18 does not get caught in the opening 41 and malfunctions.

[0059]

As is apparent from the above description, according to the disk cartridge of the present invention, a stable shutter opening / closing operation can be obtained without dust or foreign matter from entering the cartridge from the outside. Further, there is no fear that the torsion coil spring will be accidentally removed to impair the function of the cartridge, the reliability is high, and further, it is suitable for miniaturization.

Further, according to the disc cartridge and the assembling method thereof of the present invention, the components of the cartridge are not scattered during the assembling of the cartridge, and the assembling of the cartridge is very easy. Moreover, since the scattered parts do not collide with the disc during the assembly of the cartridge, the disc is not damaged.

When the opener belt is inserted after the torsion coil spring is inserted, the assemblability of the cartridge is further improved, and the reliability is further improved without damaging the opener belt.

[Brief description of drawings]

FIG. 1 is an external perspective view of a disk cartridge according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the disk cartridge according to the first embodiment of the present invention.

FIG. 3 is a plan view of the upper half of the disk cartridge according to the first embodiment of the present invention.

FIG. 4 is a plan view of the lower half of the disk cartridge according to the first embodiment of the present invention.

FIG. 5 is a configuration diagram of essential parts of the disk cartridge according to the first embodiment of the present invention.

FIG. 6 is a plan view of an essential part of the disc cartridge according to the first embodiment of the present invention.

FIG. 7 is an assembly configuration diagram showing a procedure for assembling the disk cartridge according to the first embodiment of the present invention.

FIG. 8 is a configuration diagram of main parts of a disk cartridge according to a second embodiment of the present invention.

FIG. 9 is a perspective view of a disk cartridge according to a third embodiment of the present invention.

FIG. 10 is an exploded perspective view of a disk cartridge according to a fourth embodiment of the present invention.

FIG. 11 is a plan view of the upper half of the disk cartridge of Embodiment 4 of the present invention.

FIG. 12 is a plan view of the lower half of the disk cartridge of Embodiment 4 of the present invention.

FIG. 13 is a configuration diagram of essential parts of a disk cartridge according to a fourth embodiment of the present invention.

FIG. 14 is a perspective view of a disk cartridge of a first conventional example.

FIG. 15 is a perspective view of the lower half of the disk cartridge of the first conventional example.

FIG. 16 is a perspective view of a disk cartridge of a second conventional example.

[Explanation of symbols]

 1 Disc 2 Cartridge Housing 4a Upper Half 4b Lower Half 9 Shutter 11 Slider 15 Torsion Coil Spring 18 Opener Belt 24 Window

Claims (21)

[Claims] 1. A disk cartridge for rotatably housing a disk therein, comprising a top half and a bottom half, and a motor opening hole into which a motor for rotationally driving the disk can be inserted. A cartridge housing having a head opening hole into which a recording / reproducing head can be inserted and a window portion on a side wall, a shutter movably attached to the cartridge housing for opening and closing at least the head opening hole, and the shutter. A slide member that is slidably guided inside the cartridge housing and covers the window portion so that the shutter can move in a direction to open and close the head opening hole; The shutter inside the cartridge housing, one end of which is locked to the cartridge housing and the other end of which is locked to the slide member. Disc cartridge comprising an elastic body for urging in a direction of closing the head opening hole. 2. The slider is freely movable to a slider located on one side wall of the cartridge housing and a guide groove provided across two side wall parts including the one side wall, sandwiching a corner of the cartridge housing. 2. The disk cartridge according to claim 1, further comprising an opener belt which is guided to the slider and has one end joined to the slider. 3. The slider has a protrusion, and the opener belt has a fitting hole. The slider and the opener belt are joined by the protrusion engaging with the fitting hole. The disk cartridge according to claim 2, which is provided. 4. The disk cartridge according to claim 2, wherein the shutter covers a region where the slider and the opener belt are joined. 5. The disk cartridge according to claim 2, wherein the width of the opener belt is narrower than the width of the window portion in the vicinity of the joint with the slider. 6. The slider has at least two protrusions, the opener belt has at least one through hole at one end thereof, and the shutter has at least two holes. The at least two protrusions of the at least one of the opener belts of
3. The disc cartridge according to claim 2, wherein the shutter and the slide member are connected by fitting into the at least two holes of the shutter through one fitting hole. 7. The disk cartridge according to claim 2, wherein the window has an opening into which the opener belt can be inserted. 8. The disk cartridge according to claim 1, wherein the elastic body is a torsion coil spring. 9. A motor opening hole into which a motor for rotationally driving a disk can be inserted, a head opening hole into which a recording / reproducing head can be inserted, and an upper half constituting a cartridge case having a window portion on a side wall. The step of mounting the disc in one of the lower halves, the step of inserting the sludder in the first guide groove provided in the side wall portion of the one half, and the corner of the one half The step of inserting the opener belt into the second guide groove provided across the two side wall portions including the one side wall portion, and the one half on which the disc, the slider and the opener belt are mounted, and the upper half. And the other half of the lower half are overlapped with each other to form the cartridge housing, and an elastic body is provided from the window portion of the cartridge housing to the cartridge housing. A step of inserting the elastic body into one end of the elastic body and the other end of the elastic body into the slider, and one end of the slider and the opener belt with the elastic body inside the cartridge housing. A method of assembling a disk cartridge, which comprises the step of joining one end of the disk cartridge and the step of mounting at least a shutter for opening and closing the head opening hole on the slider. 10. The slider has a protrusion, and the opener belt has a fitting hole. In the step of joining the slider and the opener belt, the protrusion is engaged with the fitting hole. The method for assembling a disk cartridge according to claim 9, wherein 11. The opener belt has an inclined portion that becomes thinner toward the tip portion, and a flat surface portion that follows the inclined portion, and the fitting hole of the opener belt is formed in the flat surface portion. And the engagement of the protruding portion of the slider with the fitting hole of the opener belt causes the second portion of the second opening with the inclined portion of the opener belt abutting the upper surface of the protruding portion of the slider. The method for assembling a disk cartridge according to claim 10, wherein the method is carried out by moving the disk cartridge along the guide groove. 12. The opener belt has a rotatable flat portion near the end portion joined to the slider, which is narrower than the width of the window portion of the cartridge housing. 11. The method for assembling a disk cartridge according to claim 10, wherein the elastic body is inserted into the cartridge housing through the window portion while protruding from the window portion to the outside of the cartridge housing. 13. The slider has at least two protrusions, the opener belt has at least one penetrating hole at one end thereof, and the shutter has at least two holes. The at least two protrusions of the shutter through the at least one fitting hole of the opener belt to the at least two of the shutter.
10. The method for assembling a disk cartridge according to claim 9, wherein the shutter and the slider are joined by fitting in one hole. 14. The method of assembling a disk cartridge according to claim 9, wherein the shutter is mounted so as to cover a region where the slider and the opener belt are joined. 15. The method of assembling a disk cartridge according to claim 9, wherein the elastic body is a torsion coil spring. 16. A cartridge housing having a motor opening hole into which a motor for rotationally driving a disk can be inserted, a head opening hole into which a recording / reproducing head can be inserted, and a window portion including an opening portion on a side wall. A step of mounting a disc on one of the upper half and the lower half, and a step of inserting a slurder into a first guide groove provided on one side wall of the half; And a step of stacking the one half to which the slider is attached and the other half of the upper half and the lower half to form the cartridge housing, and an elastic body of the cartridge housing. A step of inserting the elastic body into the cartridge housing through the window and locking one end of the elastic body to the cartridge housing and the other end to the slider; and the elastic body is inside the cartridge housing. In this state, the step of inserting the opener belt through the opening into the second guide groove provided across the two side wall portions including the one side wall portion sandwiching the corner of the one half, and one end of the slider and the opener belt. A method of assembling a disk cartridge, comprising: a step of joining one end of a belt; and a step of attaching a shutter for opening and closing at least the head opening hole to the slider. 17. The slider has a protrusion, and the opener belt has a fitting hole. In the step of joining the slider and the opener belt, the protrusion is engaged with the fitting hole. The method for assembling a disk cartridge according to claim 16, wherein the method is performed by the method. 18. The opener belt has an inclined portion that becomes thinner toward a tip end portion, and a flat surface portion that follows the inclined portion, and the fitting hole of the opener belt is formed in the flat surface portion. And the engagement of the protruding portion of the slider with the fitting hole of the opener belt causes the second portion of the second opening with the inclined portion of the opener belt abutting the upper surface of the protruding portion of the slider. 18. The method for assembling a disc cartridge according to claim 17, wherein the method is performed by moving the disc cartridge along the guide groove. 19. The slider has at least two protrusions, the opener belt has at least one penetrating hole at one end thereof, and the shutter has at least two holes. The at least two protrusions of the shutter through the at least one fitting hole of the opener belt to the at least two of the shutter.
17. The method for assembling a disk cartridge according to claim 16, wherein the shutter and the slider are joined together by fitting them in one hole. 20. The method of assembling a disk cartridge according to claim 16, wherein the shutter is mounted so as to cover a region where the slider and the opener belt are joined. 21. The method of assembling a disk cartridge according to claim 16, wherein the elastic body is a torsion coil spring.