JP2564525Y2 - Tape cassette - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a magnetic tape cassette,
The present invention relates to a tape cassette such as a cleaning tape cassette or a video tape cassette.

[0002]

2. Description of the Related Art In a conventional tape cassette, a magnetic tape is guided along a tape running path between a head house portion in a case and a hub so that the magnetic tape can be wound or unwound on the hub. The head house is rotated by being supported on the hub fitting peripheral wall part in the shaft hole, but since this head house part incorporates various attached parts, reinforcing ribs and partition walls are erected to make it durable in strength. In other parts, the thickness of the case is increased and a durable material is selected.

[0003]

However, if the conventional tape cassette is made thicker or made of an impact-resistant material in order to form an impact-resistant case housing, the tape cassette becomes not only expensive but also heavy. Inconvenience in handling, and even if the hub is supported from above and below by the peripheral wall for fitting the hub, the backlash is large, the vertical movement range as a tape winding body, and the contact area with the case is the inner surface of the case. Because it is in contact with the large, frictional resistance is large, torque fluctuations are likely to occur, and it is easy for tape running to be uneven, and ribs and partition walls are concentrated on the front head house part side,
Resin tends to concentrate on the case during injection molding of the case. was there. The present invention eliminates these conventional drawbacks, enables the proper placement of the hub for winding the tape in the case housing, reduces the contact area with the case, and reduces the torque of the hub without fluctuations. The object of the present invention is to provide a tape cassette which has a good appearance, is lightweight, and is inexpensive. It is what it was.

[0004]

According to the present invention, a pair of hubs each having a tape wound around a cassette casing comprising an upper case and a lower case are rotatably provided on a hub-fitting peripheral wall portion, and a tape between the hubs is provided. In a tape cassette in which a tape guide provided in a traveling path is erected in a case, the hub fitting peripheral wall portion is provided to protrude around a hub shaft hole of the case, and a ridge parallel to a surface including each peripheral wall portion is provided. A tape cassette characterized in that ribs are protruded into a plurality of cases in proximity to a hub fitting peripheral wall portion.

[0005]

The hub 3 is rotated by being supported by the hub fitting peripheral wall portion 8, and is mounted and supported on the center rib 9 and the side ribs 9 ₁ , 9 _1. The tape stabilizes by rotating while floating inside the tape, so that tape running can be performed smoothly and stably at a predetermined position without unevenness in tape running. The resin flow during molding is good, and the occurrence of sink marks in the case can be prevented.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 4. A pair of hubs 3 each having a tape 4 wound thereon are rotatably provided in a cassette housing comprising an upper case 1 and a lower case 2.
The upper case 1 or the lower case so that the tape guide and the tape guide pole 5 or the guide roll of substantially U-shaped section, the arcuate surface 5 ₁ is tape contact face to be deployed in the tape travel path between the hub 3 and 3 And a hub fitting peripheral wall portion 8 on which the hub 3 is supported is protruded around the hub shaft hole 10 of the case.
Said projection ribs 9, 9 ₁ thin parallel to the plane containing the peripheral wall 8
And protruding into a plurality of cases in the vicinity of the tape cassette.

The protruding rib has a width smaller than the thickness of the case and has a height on which the hub 3 is mounted. The protruding rib is connected to the peripheral wall portion 8 for fitting the hub, and is a straight line connecting the center point of the hub shaft hole 10. The center rib 9 is arranged on the upper side, and the side ribs 9 ₁ and 9 ₁ are arranged on both sides of the center rib 9 at intervals.
Although it protrudes integrally from the inner surface of the case, the head house 1
4 side is also effective to Fusetsu as reinforcing ribs 9 ₂ both to the opposite side. When the width of the ribs is smaller than the thickness of the case, the resin flow during molding is good, the residual strain is small, and the dimensional accuracy and heat resistance are excellent. Further, the rib 9, 9 ₁ one or more of the, also taken into consideration that the support piece 19 of tape regulating sheet 18 to be decorated in a case equipped on both sides to improve the assemblability I have.

The tape guide pole 5 is preferably provided so as to be foldable so as to be adjacent to the tape guide roller support pin 6 erected in the case and to be foldable. Corners on both sides 7,
It is preferable that the roller 7 is erected at an interval with the roller support pin 6 interposed therebetween. Further, the upper case 1 and the lower case 2
The thin as much as possible the thickness, a longer tape regulating rib 9 ₃ to the corner portion 7 in addition to the rib 9 provided around the fitting wearing peripheral wall portion 8, 8 of the hub 3 in order to maintain the strength Provided
It is preferable that the coupling bosses 11 and 17 of the upper and lower cases are provided in a protruding manner.

The upper case 1 and the lower case 2 include
The thickness of the flat surface wall is 1.0 mm or less, for example, 0.7 to 0.9.
and mm, the difference between the wall thickness of the peripheral side wall and thin that within a 0.2 mm, wherein between the hub fitting wearing peripheral wall portions 8 protruding ribs 9,9 ₁ between the projecting strip ribs 9, 9 window hole 1 along the ₁
If the tape winding amount is made visible by juxtaposing the two, it is possible to omit the case body from being transparent or to form a transparent window, and it is effective in that the case is unique in design.
A finger hook 13 is provided on the side of the case on the side of the head house 14, and this head house 14 is an operation section for recording and reproduction, and is composed of a combination of a fitting hole, a support wall, and an opening. Reference numeral 15 denotes a pin bearing portion, and reference numeral 21 denotes a guide roller provided as needed. 22 is a pad and 23 is a shield plate.

In the embodiment shown in FIG. 5, the tape guide pole 5 is folded, and the guide roller 21 is incorporated into the support pin 6 for use.

[0011]

According to the present invention, a hub fitting peripheral wall portion is provided so as to protrude around a hub shaft hole of a case, and a protruding rib parallel to a plane including each peripheral wall portion is provided close to the hub fitting peripheral wall portion. By projecting into multiple cases, the hub for winding the tape can be properly arranged in the case housing, the hub has a small contact area with the case, the frictional resistance is small, and the rotating torque of the hub is significantly reduced. It is easy to stabilize the torque and can significantly improve the reliability and assemblability of the tape running, and it is possible to prevent sink marks and increase the strength even if the cassette casing is thin, and it is a good-looking, lightweight, inexpensive tape. It can be used as a cassette and has practical effects such as being suitable for mass production.

[Brief description of the drawings]

FIG. 1 is an exploded plan view showing an embodiment of the present invention, in which an upper case and a lower case are separated and the inside is shown.

FIG. 2 is an enlarged vertical sectional view taken along line II of FIG.

FIG. 3 is an enlarged perspective view of a part of the case of the embodiment of FIG. 1;

FIG. 4 is a perspective view of a use state of the embodiment of FIG. 1;

FIG. 5 is a perspective view of another embodiment of the present invention in a separated state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Upper case 2 Lower case 3 Hub 4 Tape 5 Tape guide pole 5 ₁ Arc surface 6 Pin for tape guide roller support 7 Corner part 8 Peripheral wall part for hub fitting 9 Center rib 9 ₁ Side rib 9 ₂ Reinforcement rib 10 Hub shaft hole 12 Window Hole 19 Support piece

Claims (5)

(57) [Scope of request for utility model registration] 1. A tape guide provided in a tape running path between a hub and a pair of hubs each having a pair of hubs each of which is provided with a tape wound in a cassette casing formed of an upper case and a lower case. In the tape cassette erected in the case, the hub fitting peripheral wall portion is provided so as to protrude around a hub shaft hole of the case, and a ridge rib parallel to a plane including each peripheral wall portion is provided on the hub fitting peripheral wall portion. A tape cassette characterized by protruding into a plurality of cases in close proximity. 2. The tape cassette according to claim 1, wherein the width of the rib is smaller than the thickness of the case. 3. The center rib has a height on which the hub is mounted, is connected to a peripheral wall portion for hub fitting, and is arranged on a straight line connecting a center point of the hub shaft hole. 2. The tape cassette according to claim 1, further comprising: side ribs arranged in pairs at intervals. 4. The tape cassette according to claim 1, wherein the rib includes support pieces on both sides of a tape regulating sheet provided inside the case. 5. The tape cassette according to claim 2, wherein the case has a pair of window holes along the ribs between the ribs between the hub fitting peripheral walls.