JPH01211286A - Compact disk adapter and its manufacture - Google Patents

Abstract

PURPOSE:To effectively cope with a player for a large CD which is a type to detect a small CD using a light reflecting sensor by forming a reflecting film on the rear surface of an adapter for the CD by a screen printing method. CONSTITUTION:In order to reproduce an 8cm sized CD6 by a player for a 12cm sized CD, one part of the CD6 is abutted and fitted on a circular arc shaped shelf 2, the diameter of its adapter is a little shorter than 80mm, so that the part of the CD6 can be placed under claws 4 and 4, and next, the CD6 is pushed and fitted in under the claws 4 by using the flexibility of the other claw 4, and the CD6 is fitted into the adapter. On the other hand, the reflecting film is previously formed on the rear surface of the adapter for the CD by the screen printing method. Thus, the title device can effectively cope with the CD player, which is the type to detect the existence of the disk 6 using the light reflecting sensor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a compact disc adapter for playing a small compact disc with a player for larger compact discs. In the following description, the compact disc may be abbreviated as rCDJ.

[Conventional technology]

CD players currently on the market can only play CDs of a certain size (usually 12 cm in diameter).

[Problem that the invention seeks to solve]

However, recently, CDs that are smaller than the conventional popular size CDs (8 cm in diameter for boat fishing) have begun to be sold, and these small CDs cannot be played as they are on a popular size CD player. Furthermore, there is no easily available and inexpensive adapter for playing on a popular size CD player.

Therefore, the present inventor provides an adapter that allows a small CD to be played by a player for larger CDs easily and inexpensively, and that can accurately hold the small CD and guarantee playback accuracy. As a result of continuing intensive research with the aim of achieving this goal, we have succeeded in developing an adapter that can achieve this purpose. This new adapter developed by the inventor is in the form of a ring made of flexible material having the same outer diameter as a larger size compact disc, the inner circumference of the ring being A compact disc adapter that is provided with a receiving shelf that supports the bottom surface of a small compact disc at multiple locations and a side wall that supports the side surface of the compact disc, and protruding claws that press the top surface of the small compact disc at multiple locations on the inner periphery of the adapter. be.

The present inventor has continued to research this type of adapter, and during this process, some CD players of this type detect the presence or absence of a disc using a light reflection sensor. It has been discovered that there is a strong new demand for adapters for use with players. As a means to meet this demand, we came up with the idea of a new method of providing a reflective film on at least the back side of this type of CD adapter, and continued this research based on this idea. As a result, when forming a reflective film, (i) forming a reflective film without causing any trouble to the adapter body;
(ii) The reflective film has sufficient reflectivity, (in
) The appearance of the reflective film is particularly beautiful and luxurious because it is a CD adapter; (iv) it does not change in quality or color over time; (v) it has adhesive strength to the extent that it does not peel off easily. It turned out that it was necessary to satisfy all of the following.

Therefore, the problem to be solved by the present invention is to develop a CD adapter formed with a reflective film that satisfies all of the above requirements, and to establish a method for manufacturing the same.

[Means for Solving the Problem] This problem can be solved by forming a reflective film on the back surface of the CD adapter by screen printing.

[Structure and operation of the invention]

According to the present invention, the reflective film formed on at least the back surface of the adapter is formed by a screen printing method, particularly preferably by using an ultraviolet curable resin composition.

A CD adapter needs to have a certain degree of flexibility, and for this reason, it usually has a main body made of synthetic resin, and is extremely thin because it is used as a CD adapter. Therefore, it has the property of being easily deformed by heating and causing warpage.

According to the screen printing method of the present invention, when a reflective film is formed by the above method using an ultraviolet curable composition, the reflective film can be formed in a short time without any heating. can be done without causing any damage to the adapter body.

Further, when a reflective composition is used as the above composition, a sufficient reflective film is formed, and since it is coated with an ultraviolet curing resin, the film becomes stable over time.

Furthermore, since the resin component is used as a binder, sufficient adhesive strength is exhibited.

What is particularly noteworthy is that the reflective film formed by screen printing has an extremely beautiful appearance, and is luxurious and heavy.

In the present invention, the adapter on which the reflective film is to be formed, that is, the adapter itself on which the reflective film is not yet formed, is not particularly limited, and any adapter for CD may be used. Preferred representative examples will be described below with reference to the drawings.

One embodiment of the CD adapter shown in FIGS. 1 to 3 is a 12c
This is for playing on a tIl size CD player.

The adapter is generally ring-shaped and has 12
It has the same outer diameter as the cm size CD, and has a circular space 1 in the center with the same center.

On the inner periphery, that is, on the periphery of the circular space 1, there are three receiving shelves 2, a total of three side walls 3 that stand up continuously from each receiving shelf, and a short protrusion toward the space 1 in the middle of the side walls 3. A total of three protruding claws 4 are provided.

The receiving shelf 2, side wall portion 3, and protruding pawl 4 are made integrally with the ring portion 5 from impact-resistant polyethylene, and are somewhat flexible. The degree of flexibility is approximately 200 to 800 in terms of bending strength according to ASTM standard test method D790.
kg/Cfl! It is.

Each receiving shelf 2 has a length L1=8 in an arc shape along the circumference of the space 1.
0 mm extension, adapter radial width W 1 = 1.5 mm,
Thickness T I =0.4 mm. The lower surface of the shelf 2 is in the same surface position as the lower surface of the ring portion 5 which is continuous thereto.

Circumferential length P1 of space l of each side wall 3=8On+m
, the thickness of approximately CD from the top surface of shelf 2 H1 = 1.2
mm is rising. Further, the inner surface 31 of each side wall portion 3 is sloped to match the slope of the side surface of the CD 6.

The tip of the winter melon 4, in other words, the length of the portion 41 that contacts the top surface of the CD (the length in the circumferential direction of the space 1) S1 is 2 mm (see FIG. 2). Further, the adapter radial length R1 of the portion 41 is 0.2 mm, and the height h 1 from the top surface of the shelf 2 to the top surface of the claw is 1.6 rMl.

The lower surface 42 of the claw 4 is in the same surface position as the upper surface 32 of the side wall portion 3.

The diameter DI of an imaginary circle in which the corners 3' of the shelf 2 and the side wall portion 3 are connected is 80.1 m, and the diameter d 1 of an imaginary circle in which the tips of the claws 4 are connected is 79.9 mm. In addition,
The thickness of the ring part 5 is 1.2 mm.

According to this adapter, the small 8 cm CD 6 is first fitted into the shelf 2 and the side wall 3 so that a part of it is placed under any two claws 4.4, and then the remaining claws are fitted into the shelf 2 and the side wall 3. Using the flexibility of No. 4, the nail is pushed and fitted under the nail while bending the nail.

In order to fit the CD under the last claw 4, the entire adapter may be slightly bent so as to open the claw relatively upward. In this way, the CD can be fitted into the adapter very easily.

In this way, the CD 6 is secured in a predetermined portion of the adapter, and the adapter and the CD 6 are loaded into a 12 cm size CD player and reproduced or played with high precision.

Note that the slope of the inner surface of the side wall part does not have to be uniform as in the above embodiment (for example, as shown in FIG. The slope may be larger than that of the inner surface 312 and may be formed in an open manner.

Still other embodiments are shown in FIGS. 5 to 7.

This embodiment of the CD adapter is also for playing an 8 cm size CD, generally called a CD single, on a player for 12 cm size CDs.

The adapter also has a ring shape as a whole, and has 12
It has the same outer diameter as cm size CD, and has a circular space 10 having the same center in the center.

The periphery of the space 10 is provided with nine receiving shelves 21 to 29, side wall parts 31 to 36, and protruding claws 41 to 43 that protrude briefly toward the space 10.

These receiving shelves, side walls, and protruding claws are made integrally with the ring portion 50 from high-impact polystyrene.
Slightly flexible. The degree of flexibility is the same as in the previous embodiment.

The receiving shelf 21.24.27 extends in an arc shape along the circumference of the space 10 with a length L2 = 13 m, and the receiving shelf 22.25.28 extends in a circular arc shape with a length L3-13 mm along the circumference of the space 10,
The receiving shelves 23, 26, 29 extend in an arc shape along the periphery of the space 10 with a length L4=34 mm.

The adapter radial width W2 of these receiving shelves is 1.4 mm, and the thickness T2 is 0.4 mm. The lower surface of each column is in the same surface position as the lower surface of the ring portion 50 that follows it.

Circumferential length P of space 1o of side wall portion 31.33.35
2=14 mm, and the space I of the side wall part 32, 34, 36
The circumferential length of O is P3 = 66 mm, and each side wall has a thickness of approximately CD from the top surface of the receiving shelf H2 = 1.2 ttt
m is standing up. In addition, the inner surface of each side wall part is designed so that it is easy to fit the CD6, as in the adapter shown in Fig. 4.
The slope of the upper inner surface 301 is made larger than the slope of the lower inner surface 302 to form an open structure.

The tip of the winter melon 41, 42, 43, in other words, the length of the portion 40 that contacts the top surface of the CD (circumferential length in a space of 1°) S2 is 2 mm. Further, the adapter radial length R2 of the portion 40 is 0.2 mm, and the height h2 from the top surface of the receiving shelf to the top surface of the claw is 1.7 mm. Lower surface of protruding claw 4
00 has the same surface position as the upper surface 300 of the side wall portion.

The diameter D 2 of an imaginary circle that connects the corners 3'' where the receiving shelf and the side wall are continuous is 80.1 mm, and the diameter d of an imaginary circle that connects the tips of the protruding claws is 79.5 mm. Ring portion 50 The thickness is 1.2 mm.

In the ring portion 50, a narrow hole 500 and a narrow recess 600 are provided in a portion corresponding to each protruding pawl 41, 42, 43.

The narrow hole 500 consists of a central hole 501 and end holes 502 and 503 continuous to both ends of the central hole. When viewed from above, the central hole extends in a chevron or helmet shape behind the protruding claw, and the end holes are formed on the inner circumference of the ring. It extends along. Note that a portion 504 surrounded by the central hole 501 is provided with projections and depressions for preventing slipping. Further, the narrow recess 600 enters into the ring part 50 from the inner peripheral part of the ring near one end hole 502, and
extends behind.

According to this adapter, a small CD 6 of 8 cm size is produced by pinching the rear part 504 of one of the protruding claws, for example, the claw 41, from above and below between the fingers of the ring part 50, and then opening the narrow hole 500 and the narrow concave part of the ring part 50. Using the gap 600, pull this part outward in the adapter radial direction E, and
is retreated from the space 10. Then, CD6
is placed under the other two claws 42 and 43 so as to abut and fit on the receiving shelf and the side wall portion, and then the hand is released from the portion 504 and the claw 41 is placed on the top surface of the CD.

In this way, the CD 6 is secured in a predetermined portion of the adapter, and the adapter and the CD 6 are placed on a 12 cm size CD player and reproduced or played with high accuracy.

The present invention is not limited to the above embodiments, and can be implemented in various other ways.

For example, the number of protruding claws, the number of receiving shelves, the number of side wall parts, their dimensions, etc. are not limited to those of the above embodiments. These numbers do not necessarily have to match each other. The receiving shelves and side walls do not necessarily have to be divided as in the above embodiments, and may be continuous as a whole (in this case,
The number is one. ).

Further, when providing narrow holes near the protruding claws, it is not necessary to provide them corresponding to all the protruding claws. The shape of the narrow hole is not limited to the above embodiment, and various other shapes can be adopted. In short, it is only necessary to move one or more of the protruding claws to facilitate CD loading. The narrow recesses provided for the narrow holes can also be of various types in terms of their position, number, shape, etc. In short, this recess may be of any type as long as it assists the backward movement of the protruding pawl through the narrow hole.

In addition to the impact-resistant polystyrene mentioned above, examples of adapter manufacturing materials include ABS resin, polypropylene, polyacetal, medium density polyethylene, and the like.

Further, the flexibility may be selected from a range of about 200 to 8 degrees Okg/ci in terms of bending strength according to ASTM standard test method D790, depending on the selected material and the dimensions of each part of the adapter.

Generally speaking, a softer material will be selected when the number of protruding pawls is large or when the radial length R of the protruding pawls is large.

Regarding the dimensions of each part, the thickness of the receiving shelf T (TI, T2
), the height h (hl, h2) from the shelf to the upper surface of the claw can be selected from the following range, and the number of receiving shelves and the dimensions of each part W (Wl, W2), L (Ll and L2 to L4 ), the number of side wall parts and the dimensions of each part H (Hl, H2), P (PI and P2 to P3), the number of protruding claws and the dimensions of each part R (R1,
An example of the relationship between R2) and 5 (SL, 32) is as in the memorial service.

T: 0.2-0.4M tMl, 4-1.8 mm (margin below) to 13456 Wmm O, 50, 50, 50, 50, 5-1.5
~1.5 ~1.5 ~1.5 ~1.5Lm
m All around 20 20 10 5~80
~50 ~40 ~35 lessons! Number 13456 Hmm O, 80, 80, 80, 80, 8~1.8
~1.8 ~1.8 ~1.8 ~1.8Pmm All around 20 20 10 5~80 ~50
~40 ~35 Zm2 number 3 4 5 6R
mm O, 20, 150, 150, 1~0.3
~0.25 ~0.25 ~0.2SrrIm2
~10 2-8 1-5 1-5 In the present invention, a reflective film is formed by screen printing on the adapter on which the reflective film is not formed. In particular, in the present invention, it is preferable to use an ultraviolet curable reflective resin composition and to form it by the printing method described above.

The ultraviolet curable reflective resin composition itself used in the present invention is conventionally known, and any conventionally used one can be used.

Preferred representative examples thereof are explained below. The components constituting the composition are an ultraviolet curable resin, a reflective pigment, and, if necessary, a photopolymerization initiator, a sensitizer, and other additives. As the ultraviolet curable resin, any conventionally known resin can be used, and typical examples include acrylic monomers and oligomers such as polyester acrylate, urethane acrylate, and epoxy acrylate.

Any conventionally known photopolymerization initiators and photosensitizers can be used, such as those based on benzoic acid or its esters, benzophenone, and sulfonic acid.

The composition of the present invention contains a light-reflecting pigment or dye, but any pigment or dye that can reflect light may be used, such as various metal powders or metal-coated pigments. etc., and aluminum can be cited as a representative example.

In addition, various conventionally known additives may be added as necessary.

The screen printing method itself may be performed by a conventional method.

Although the case where an ultraviolet curing resin is mainly used as a means for forming the reflective film has been described above, in the present invention, ordinary solvent-based paints can also be used as long as the screen printing method is used. Any conventionally known solvent-based paint can be used in this case.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to easily and inexpensively provide a small CD for playing or playing on a player for a larger CD, and at the same time, it is possible to accurately hold the small CD and play or play with precision. We can provide an adapter that can guarantee the same. Furthermore, even if the large-sized CD player has a detection function using a light reflection sensor, it can effectively cope with this and can reliably reproduce or perform. Moreover, its appearance is beautiful and luxurious.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a plan view, FIG. 2 is a sectional view taken along line X-X in FIG. 1, and FIG. It is an enlarged sectional view along the Y-Y line of
FIG. 4 is an enlarged sectional view of a part of another embodiment, FIGS. 5 to 7 show still other embodiments, and FIG. 5 is a plan view;
6 is a partially enlarged plan view of the adapter shown in FIG. 5, and FIG. 7 is a sectional view taken along the line Z--Z in FIG. 6. 1.10... Circular space part, 2.21-29... Receiving shelf, 3.31-36... Side wall part, 4.41-43... ... protruding claw, 5.50 ... ring part, 500 ... narrow hole, 501 ... center hole, 502.503 ... end hole, 600...Narrow recess, 6...Small CD. Patent Applicant Daio Kosan Co., Ltd. Figures 1-, 2, 2, 3, 4, and 5

Claims (3)

[Claims] (1) A compact disc adapter in which a reflective film is formed by screen printing on the back side of the compact disc adapter. (2) in the form of a ring made of flexible material having the same outer diameter as a larger size compact disc;
The inner periphery of the ring is provided with a receiving shelf for supporting the lower surface of the small compact disc at the entire inner periphery or at multiple locations thereof, and a side wall portion for supporting the side surface of the small compact disc at multiple locations on the inner periphery. 2. The compact disc adapter according to claim 1, further comprising a protruding pawl for pressing the top surface, and a reflective film formed by screen printing on the back surface of the protruding pawl. (3) A method for producing a compact disc adapter, which comprises coating the back surface of the compact disc adapter with an ultraviolet curable reflective composition by screen printing, and then curing it by irradiating it with ultraviolet rays.