【図面の簡単な説明】[Brief explanation of the drawing]
第１図は本考案の斜視図、第２図は第１図の平
面図で内径及び外径を示した図、第３図は他の実
施例の平面図、第４図は第３図の平面図で内径及
び外径を示した図、第５図及び第６図はビデオテ
ープカセツトに本考案を取付けテープを走行させ
異物が付着した状態の一部横断面図、第７図は従
来の円筒中空管体のテープ案内スリーブ、第８図
は従来の円筒中空管体の上端部及び下端部にＶ溝
を形成したテープ案内スリーブの斜視図、第９図
は第７図の平面図で内径及び外径を示した図であ
る。
１……円筒中空管体、２……外周面凸部、３…
…外周面凹部、３ａ……段差、４……内周面凸部
、５……内周面凹部、６……外径、７……管体上
端部、８……管体下端部、９……内径凸部、１０
……外径、１１……内径、１２……テープ、１３
……テープガイド、１４……異物、１５……固定
部材、１６……案内スリーブ支持部材、１７……
上部Ｖ溝、１８……下部Ｖ溝、１９……肉厚。
Fig. 1 is a perspective view of the present invention, Fig. 2 is a plan view of Fig. 1 showing the inner and outer diameters, Fig. 3 is a plan view of another embodiment, and Fig. 4 is a plan view of Fig. 3. A plan view showing the inner and outer diameters, Figures 5 and 6 are partial cross-sectional views of the present invention installed in a videotape cassette with foreign matter adhering to it while the tape is running, and Figure 7 is a cross-sectional view of a conventional videotape cassette. A tape guide sleeve of a cylindrical hollow tube; FIG. 8 is a perspective view of a conventional tape guide sleeve with V grooves formed at the upper and lower ends of a cylindrical hollow tube; FIG. 9 is a plan view of FIG. 7. FIG. 2 is a diagram showing the inner diameter and outer diameter. 1... Cylindrical hollow tube body, 2... Outer peripheral surface convex portion, 3...
... Outer circumferential surface recess, 3a... Step, 4... Inner circumferential surface convexity, 5... Inner circumferential surface recess, 6... Outer diameter, 7... Tube top end, 8... Tube bottom end, 9 ...Inner diameter convex part, 10
...Outer diameter, 11...Inner diameter, 12...Tape, 13
... Tape guide, 14 ... Foreign matter, 15 ... Fixing member, 16 ... Guide sleeve support member, 17 ...
Upper V groove, 18...Lower V groove, 19...Wall thickness.