JPS6138136Y2 - - Google Patents

Description

[Detailed description of the invention] The invention relates to a lid for a disc-shaped recording medium storage container.
A protrusion is provided between the ends of the chained portion of the chained zigzag-shaped displacement member provided between the lock arm of the lid that detachably engages with the opening of the disc-shaped recording medium storage container and the lid main body. Therefore, when displacing the lock arm, the movement of the displacement member is smooth, the lock arm operates well, there is less stress concentration in the chain part of the displacement member, there is no damage to the displacement member, and the spring property of the displacement member is improved. To provide a lid for a disc-shaped recording medium storage container which is highly flexible, has a smooth restoring operation of a displaced lock arm, and ensures reliable engagement between the lock arm and the storage container.

The present applicant first applied for a cartridge for a disc-shaped information recording medium, which comprises a storage container body in which a disc-shaped recording medium is stored, and a lid that is detachably coupled to the storage container body and closes the opening of the storage container body.

In this cartridge, the case is inserted into the playback device, and at that time, the lock release member disengages the engagement protrusion of the lock arm from the engagement recess of the case body, and the lid is locked in the playback device. The disk-shaped recording medium is left hanging on the device, and the disc-shaped recording medium is mounted in the playback device using a clamp device. In order to retrieve the disk-shaped recording medium installed in the playback device into the case body, insert the empty case body into the playback device, release the latching state by the above-mentioned latching device, and release the latching state by the clamping device. The lid and disk-shaped recording medium are recovered into the case body by the return operation.

However, such a disc-shaped recording medium storage container has a structure in which the lock arm's engagement protrusion is engaged with and disengaged from the engagement recess using only the spring properties of the lock arm. The displacement of the lock arm is large and may therefore exceed the elastic limit of the plastic lock arm.
For this reason, as the storage medium is loaded and retrieved several times, the lock arm loses its springiness.
The restoring action of the lock arm may become slow or may not return to the predetermined engagement position. and,
In such a case, since the engaging convex portion of the lock arm does not engage with the engaging recess, there is a problem that the case body may be taken out of the reproducing device while the lid remains inside the reproducing device.

Therefore, in order to solve the above-mentioned drawbacks, the present applicant has developed a lid for a disc-shaped recording medium storage container that includes a lock arm provided on the lid for engagement with the dome-shaped recording medium storage container and a lid main body. During this period, an application was filed for a structure in which a displacement member was provided which was displaced together with the lock arm when the lock arm was displaced beyond a predetermined value.

That is, as shown in FIG.
The lock arms 3a, 3b have engagement convex portions 4a, 4b formed on the outer side surfaces thereof to engage with the engagement holes of the disc-shaped recording medium storage container main body. It is connected to the main body part 2 by curved parts 5a, 5b extending in a curved line from the part 2 and spring parts 6a, 6b extending from the main body part 2 to the lock arms 3a, 3b.
The spring portions 6a, 6b are constructed in a zigzag shape in which thin plate portions 7a, 7b and thick plate portions 8a, 8b are alternately connected, and projections 9a, 9 are provided at the ends of the connecting portions.
b is formed.

However, even with this improved lid, some problems remain, although not as severe as in the case of the lid described above, namely, the locking arm and spring section retain the lid in the regenerator while being displaced. Therefore, the restoring force of the spring part gradually weakens, and the speed of restoring the lock arm is slow, and even if you try to recover the disk-shaped recording medium held in the playback device after playback, the lock arm may not reach the speed at which the disk-shaped recording medium storage container is removed. The restoration speed cannot keep up, and as a result, the engaging convex part of the lock arm cannot engage with the engaging hole of the disc-shaped recording medium storage container body, and the lid may remain inside the playback device. .

The present invention eliminates the above drawbacks, and examples thereof will be described below.

FIG. 2 shows one of the disk-shaped recording medium storage containers to which the lid of the disk-shaped storage medium storage container according to the present invention is applied.
This is an example, and the disk-shaped recording medium storage container 1
1 is a cylindrical disk-shaped recording medium storage container body 12;
and a rear lid 13 inserted and fixed at the rear end, and engagement holes 15a and 15b are formed on both left and right sides of the front opening 14 side of the disc-shaped recording medium storage container main body 12. has been done. The disc-shaped recording medium storage container main body may be formed into a cylindrical shape by bonding plates with substantially concave cross sections facing each other. In FIG. 2, numeral 16 is a disk-shaped recording medium such as a video disk.

FIG. 3 is an explanatory view showing one embodiment of the lid of the disc-shaped recording medium storage container according to the present invention. It has tentacle-like lock arms 22a and 22b on both the left and right sides of the main body part 21,
On the outer side of each lock arm 22a, 22b,
Engagement protrusion 2 that engages with the engagement holes 15a and 15b
3a and 23b are formed.

These lock arms 22a, 22b are connected to the main body 2.
Curved sections 24a and 24b extending in a curved line from 1;
Spring parts 25a and 2 are zigzag-shaped displacement members extending from the main body part 21 to the lock arms 22a and 22b.
5b to the main body portion 21.
Further, the curved portions 24a, 24b are provided with curved support portions 26a, 26b connected to a position on the main body portion 21 that substantially corresponds to the bent tip portion from a position slightly inside the bent tip portion of the lower end thereof.

Protrusions 27a and 27b are provided on the upper end side walls of the chain parts of the spring parts 25a and 25b, and when the lock arms 22a and 22b are displaced, the tips of the protrusions 27a and 27b abut against the adjacent chain part side walls, thereby locking the lock arms. The displacement of spring parts 25a, 25b
It is designed to be transmitted in a wave-like manner to each piece. or,
The spring portions 25a, 25b have protrusions 28a, 28b formed in the vicinity of the middle part of every other piece, that is, protrusions 28a, 28b are formed in the vicinity of the middle part of every other piece of the spring parts 25a, 25b. It has a wide width.

By configuring the lid of the disc-shaped recording medium storage container as described above, the operation for releasing the coupling of the lid to the disc-shaped recording medium storage container is as follows.
As shown in FIGS. 6 to 6, lock release members 31a and 31b fixed to the left and right rear parts of the playback device are
When the storage container is inserted into the playback device, it comes into contact with the tips of the lock arms 22a and 22b, and when it is further inserted, the lock arms 22a and 22b are elastically displaced as shown in FIG. 6
As shown in the figure, the engagement convex portion 23a of the lock arm,
23b comes to come out from the engagement holes 15a, 15b, and the lid and the storage container can be separated.

In the process of this elastic displacement, the lock arm is displaced against its own elasticity and the elasticity of the spring part. First, from Fig. 4 to Fig. 5, the lock arm is in a free state, mainly The lock arms 22a and 22b are displaced by their own elasticity, and when the lock arms 22a and 22b are displaced to a certain extent and reach the state shown in FIG.
b, the spring part starts to be displaced, and when the displacement progresses further and reaches the state shown in FIG. The protrusions 28a and 28b provided at the intermediate portion come into contact with adjacent spring pieces, and these movements proceed in a wave-like manner. In other words, when one part of the displacement member is displaced to a certain extent, the next part is displaced, so the displacement member is only displaced within its elastic limit, and the springiness of the displacement member is reduced. never be lost. In particular, when the displacement member is displaced, each piece of the spring part comes into contact with each other near the middle part, so abnormal stress due to displacement does not concentrate on the chain part of the spring parts, and the displacement operation is smooth.
Therefore, the movement of the lock arm is smooth and natural, and there are no cases of whitening or cracking in the chain of spring parts, which causes the lock arm to lose its springiness, making it easier to restore the lock arm. It is extremely durable. Also, regarding the restoring operation of the lock arm, due to the reaction from the protrusions 28a and 28b provided approximately in the middle of the spring part,
The pieces of the spring portions 25a, 25b that are subjected to the reaction force are restored at a correspondingly faster speed, and therefore the restoring displacement of the lock arm is carried out smoothly.

Further, since the spring portion is provided with a protrusion and has a wide portion, the protrusion portion becomes a resin reservoir, and when the lid is made by molding, the resin flows well.

In addition, the support portions 26a and 26b provided between the curved portions 24a and 24b and the main body portion 21 prevent excessive deformation of the curved portion when a vertical force is applied to the lock arm, thereby reducing the deterioration of spring properties. In addition, it improves the flow of the synthetic resin material when molding the lid by, for example, an injection molding method, and reduces the incidence of defective products during molding.
When a and 26b are configured in a curved shape with substantially the same direction as the curved shape on the base side of the curved portion, the above effect is maximized. Moreover, the supporting parts 26a, 2
6b and the curved portions 24a, 24b are located on the inner side of the lower bent tip, so the displacement of the lock arms 22a, 22b is smooth.

Incidentally, it is convenient to form a drawing taper so that the lid made by molding can be easily removed when the lid is removed.

As described above, the lid of the disc-shaped recording medium storage container according to the present invention is a lid that is removably engaged with the front opening of the disc-shaped recording medium storage container. For this purpose, a chain zigzag displacement member is provided between the lock arm provided on the lid and the lid main body, and a protrusion is provided at a position other than the chain portion of the chain zigzag displacement member piece to displace the lock arm. Since the protrusion and the displacement member piece adjacent to the protrusion are configured to come into contact with each other when the lock arm is displaced, the movement of the displacement member is smooth and the lock arm operates smoothly. There is less stress concentration in the chain part, there is no damage to the chain part of the displacement member, the spring properties of the displacement member are highly durable, and the restored movement of the displaced lock arm is quick.
It has features such as reliable engagement between the lock arm and the disc-shaped recording medium storage container.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the lid of a disc-shaped recording medium storage container, FIG. 2 is an explanatory diagram of a disc-shaped recording medium storage container to which the lid of the disc-shaped recording medium storage container is applied, and FIG. 3 is an explanatory diagram of the disc-shaped recording medium storage container according to the present invention. 1 of the lid of the disc-shaped recording medium storage container
Explanatory diagrams of the embodiment, FIGS. 4 to 6 are explanatory diagrams for explaining its operation. 20... Lid, 21... Main body, 22a, 22b
...Lock arm, 23a, 23b...Engagement convex portion, 24a, 24b...Curved portion, 25a, 25b
...Spring part, 26a, 26b...Support part, 27
a, 27b...Protrusion, 28a, 28b...Protrusion.

Claims (1)

[Scope of utility model registration request] In a lid that is removably engaged with the front opening of a disc-shaped recording medium storage container, there is a lock between the lock arm provided on the lid for engagement with the disc-shaped recording medium storage container and the lid main body. A chain zigzag displacement member is provided, and a protrusion is provided at a position other than the chain portion of the chain zigzag displacement member piece, and when the lock arm is displaced, the protrusion and the displacement member piece adjacent to the protrusion come into contact. A lid for a disc-shaped recording medium storage container, characterized in that it is configured to do so.