JPH04137575U - tape cartridge - Google Patents

Abstract

(57) [Summary] [Structure] A transparent window plate 7 is placed in the window hole 4 of the case body 6 which has been formed as a secondary molding so that its outer surface 7a is lower than the height of the outer surface 6a of the case body 6. has been done. A hole edge 10 on the inner periphery of the window hole 4 of the case body 6 facing the periphery on the outer surface 7a of the transparent window plate 7 is connected to a precipice surface 11 rising almost perpendicularly from the outer surface 7a of the transparent window plate 7, and a precipice surface 11 of the precipice surface 11. It is formed by two inclined surfaces 12 that connect the upper end and the outer surface 6a of the case body 6. [Effects] The inclined surface 12 allows the deck-side presser spring member to be smoothly inserted and removed without getting caught on the hole edge 10, and the cliff surface 11 allows the window outline to be clearly displayed, increasing the bonding strength of the transparent window plate 7. It can be made constant.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to tape cartridges with transparent windows for audio, video, etc. , More specifically, the case body and the transparent window plate are integrally molded using two-color molding. Regarding.

0002

[Conventional technology]

As this kind of tape cartridge, for example, Japanese Utility Model Application Publication No. 63-22667 In order to make it easier to see the amount of tape remaining inside, and for design effects, we used a transparent window panel. is integrally molded into the case body using a two-color molding method. In this case, a transparent window plate 7 is placed outside the window hole 4 of the case body 6 as shown in FIG. It is integrally molded so that the surface 7a is lower than the height of the outer surface 6a of the case body 6, and the window hole is An inclined surface 12 is provided on the hole edge 10 facing the outer surface 7a of the transparent window plate 7 on the inner periphery of the hole 4. has been formed.

0003 According to this, the outer surface 7a of the transparent window plate 7 is sunk lower than the outer surface 6a of the case body 6. Since the transparent window plate 7 is formed in such a shape as to prevent scratches on the outer surface 7a of the transparent window plate It is possible to prevent scratches and maintain transparency. In addition, by forming an inclined surface 12 on the hole edge 10, it is possible to take it in and out of the deck. There is also a problem where the pressing spring member on the deck side gets caught on the hole edge 10 when You can put it in and take it out easily.

0004

[Problem that the idea aims to solve]

However, as in the conventional example mentioned above, the hole edge 10 on the inner periphery of the window hole 4 of the case body 6 is If the inclined surface 12 is formed over the entire height direction, the case body 6 can be When molding, make sure that the molding resin reaches the tip of the hole edge 10, which corresponds to the final filling area. It is difficult to wrap around and easily becomes flaky. Therefore, the window contour line formed by the hole edge 10 is clear. It will not form a nice straight or curved shape, but will be irregular, resulting in an unsightly appearance and leaving tape residue. It becomes difficult to see the amount. In addition, since the hole edge 10 tends to become flaky, it Adhesive strength tends to vary.

[0005] The object of the present invention is that the transparent window plate 7 has its outer surface 7a connected to the case body 6 as described above. A tape that is integrally formed on the case body 6 so that it sinks lower than the height of the outer surface 6a of the case body 6. In the cartridge, the cross-sectional shape of the hole edge 10 of the window hole 4 of the case body 6 is improved. This eliminates the problem of getting caught when loading and unloading the deck, and also eliminates the problem of getting caught on the deck. The contour line can be aligned in a neat straight line or curved line, and the bond with the transparent window plate 7 is strengthened. We also aim to ensure that the

[0006]

[Means to solve the problem]

As illustrated in FIG. 1, the tape cartridge of the present invention has a window hole in the case body 6. 4. The hole edge 10 on the inner periphery facing the periphery on the outer surface 7a of the transparent window plate 7 is connected to the outer surface of the transparent window plate 7. A cliff face 11 that rises almost vertically from 7a, the upper end of the cliff face 11, and the case body It is formed by two inclined surfaces 12 that connect the outer surface 6a of 6.

[0007]

[Effect]

The hole edge 10 of the window hole 4 stands on a cliff face 11 that is substantially perpendicular to the outer surface 7a of the transparent window plate 7. Since the shape is raised, the resin material should be sufficiently wrapped around the edge of the hole edge 10. The outer surface 7a of the transparent window plate 7 can be covered and pressed with a predetermined thickness. . Therefore, variations in adhesive strength with the transparent window plate 7 are reduced. Also, that cliff The window outline can be clearly shown on the surface 11.

[0008] The upper end of the cliff surface 11 of the hole edge 10 and the outer surface 6a of the case body 6 are connected by an inclined surface 12. Therefore, the pressing spring member on the deck side does not get caught.

[0009]

[Effect of the idea]

Therefore, according to the present invention, there is the problem of getting caught when loading and unloading the deck. Not only can you eliminate this problem, but you can also clearly show the outline of the window. It is easier to see the remaining amount, and the strength of the integral bond with the transparent window plate 7 is constant, increasing reliability. You can get something that is excellent.

0010

【Example】

The drawing shows an example in which the present invention is applied to a Phillips-type tape cartridge. vinegar. In FIG. 2, a tape 2 is wound inside the cartridge case 1. It stores Bu 3.3. The cartridge case 1 includes a case body 6 having a window hole 4. and a transparent window plate integrally molded within the window hole 4 of the case body 6 and having a drive shaft insertion hole 5. It consists of 7.

[0011] In FIG. 1, the inner periphery of the window hole 4 of the case body 6 includes a hole edge 9 that increases the diameter of the window hole; A hole edge 10 that makes the diameter of the window hole smaller than that is formed in a stepped shape inside and outside. The transparent window plate 7 is integrally molded to fit inside the hole edge 9 on the inner end side of the inner periphery of the window hole 4. Therefore, the outer surface 7a of the transparent window plate 7 is sunk lower than the height of the outer surface 6a of the case body 6. At the same time, the outer surface 7a of the transparent window plate 7 is formed at the hole edge 10 on the inner peripheral outer end side of the window hole 4. It is formed to cover the upper periphery. Therefore, the transparent window plate 7 is located at the inner edge of the window hole 4. The two surfaces of the hole edge 9 on the side and the lower surface 13 of the hole edge 10 on the outer end side of the inner circumference are integrally fused and joined. Ru.

0012 A hole edge 10 on the outer end side of the inner circumference of the window hole 4 rises from the outer surface 7a of the transparent window plate 7 at a substantially right angle. a cliff face 11 that extends outward, and an outwardly expanding cliff face 11 that connects the upper end of the cliff face 11 and the outer surface 6a. It is formed in a shape having an inclined surface 12. The case body 6 and the transparent window plate 7 are molded using a two-color molding method. That is, window hole 4 After primary molding of the case body 6 having do.

[0013] FIGS. 3A and 3B show the structure of a two-color mold. (A) in Figure 3 is the primary forming In this state, there is a primary molding space 1 between the fixed side insert 15 and the movable side insert 16. form 7. The fixed side insert 15 is provided with a vertical surface portion 19 and an inclined surface portion 20 for forming the hole edge. It's on. The fixed side insert 15 and the movable side insert 16 have cores for forming the drive shaft insertion hole. 21 and 22 are set against each other.

[0014] In this way, the primary molding resin is injected into the primary molding space 17 to perform cooling modeling. Thus, a case body 6 having a window hole 4 is obtained. During this primary molding, resin is used for hole edge molding. It can be filled sufficiently until it hits the vertical surface part 19, and the vertical surface part 19 and A precipice surface 11 and an inclined surface 12 are formed on the hole edge 10 by the inclined surface portion 20.

[0015] After the primary molding, the movable side insert 15 is attached to the inner surface of the case body 6 as shown in FIG. Secondary molding space 2 between the case body 6 which is the primary molded product by retracting to the height position 3 and injecting transparent secondary molding resin into this secondary molding space 23. , a transparent window plate 7 having a drive shaft insertion hole 5 in the window hole 4 of the case body 6 is attached to the outer surface 7 of the transparent window plate 7. a is lower than the height of the outer surface 6a of the case body 6, and the transparent window plate 7 is The entire circumference is formed into a shape that is integrally joined with two surfaces: the hole edge 9 on the inner circumference of the window hole 4 and the lower surface 13 of the hole edge 10. did.

[Brief explanation of drawings]

FIG. 1 is an enlarged sectional view taken along line A-A in FIG. 2;

FIG. 2 is a plan view of the overall appearance.

FIG. 3 is a sectional view of a molding die.

FIG. 4 is an enlarged sectional view of main parts of a conventional example.

[Explanation of symbols]

4 Window hole 6 Case body 7 Transparent window board 10 Hole edge 11 Cliff surface 12 Slope

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Hitoshi Shiba Hitachi Ma, 1-1-88 Ushitora, Ibaraki City, Osaka Prefecture Within Kusel Co., Ltd.

Claims (1)

[Scope of utility model registration request] Claim 1: A transparent window plate 7 is second-molded in the window hole 4 of the primary-molded case body 6 so that its outer surface 7a is lower than the height of the outer surface 6a of the case body 6. In the tape cartridge, the hole edge 10 on the inner periphery of the window hole 4 of the case body 6 facing the periphery on the outer surface 7a of the transparent window plate 7 is
A cliff surface 11 that rises almost perpendicularly from the outer surface 7a of the transparent window plate 7, and the upper end of the cliff surface 11 and the outer surface 6a of the case body 6.
A tape cartridge characterized in that it is formed of two inclined surfaces 12 that connect the two sides.