JPH0441501Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention is suitable for use as a tape cassette for a video tape recorder, for example, and particularly relates to a tape cassette equipped with a guard panel (opening/closing lid). be.

(Prior Art) In a conventional tape cassette used in a video tape recorder, as shown in the overall perspective view in FIG. 5, a cassette housing 1 is formed from an upper half 1a and a lower half 1b. A rotatably supported guard panel 2 is provided on the front surface of the vehicle. This guard panel 2 is shown in Figures 5 and 7.
As shown in Fig. 8 and Fig. 8, it is composed of a top plate part 2a, a front plate part 2b, and a side plate part 2c, and when the tape cassette is used, the lid is opened as shown in Fig. 5, and when the tape cassette is not used, the cassette housing 1 is opened. The lid is held closed by a lock mechanism (not shown) provided in the lid.

Further, the upper plate portion 2a of the guard panel 2 is attached to the stepped portion 1e formed on the front surface of the upper half 1a of the cassette housing 1, and the upper plate portion 2a of the guard panel 2 is attached to the upper surface of the cassette housing 1 (of the upper half 1a) Since the top surface of the plate portion 2a is substantially flush with the top surface when the lid is closed, this tape cassette can be easily inserted into the video tape recorder which is the main body of the device.

FIG. 6 is a rear perspective view mainly showing screw tightening positions for assembling and joining the upper half 1a and lower half 1b forming the cassette housing 1 shown in FIG. 5, and will be described later from the lower half 1b side. Screw hole portion 1f for fixing the cylindrical tape guide member (usually a metal product) 4 and other screw hole portions 1g
The upper half 1a and the lower half 1b are connected by rotating and inserting a screw 5, which is a screw member.

(Problems to be Solved by the Invention) FIGS. 7 and 8 show the tape guide member 4 of the conventional tape cassette shown in FIGS. 5 and 6 described above.
FIG.
FIG. 7 is a diagram showing the state before screw tightening, and FIG. 8 is a diagram showing the state after screw tightening.

In such a tape cassette, the guard panel 2 is attached to the upper half 1a in advance, and after assembling a lock mechanism (not shown) that keeps the guard panel 2 in a closed state when not in use, the lower half 1b is attached. The cassette housing 1 is formed by assembling and joining the upper half 1a and the lower half 1b by tightening the screws 5 from the sides.

That is, as shown in FIG. 7, the tape guide member 4 is brought into contact with the upper surface of the upper half 1a on the base 3.
The screw 5 is rotatably inserted into the screw hole 1f corresponding to the upper half 1a, but in this case, the screw 5 is formed over the longitudinal direction of the upper half 1a. A slight gap Z is created between the stepped surface portion 1e formed by the inclined portion 1e-1 and the flat portion 1e-2 and the inner surface 2a' of the upper plate portion 2a of the card panel 2. For this reason, upper half 1
When the screw 5 (diameter 5a), which has a larger diameter than the screw hole diameter 1h of the tape guide boss 1j in a, rotates and hits the screw hole diameter 1h (the relationship between the diameters is as follows: If the diameter of the hole is 1i, 1i>5a>1h), upper half 1a
As shown in FIG. 8, 1e-1 and 1e-2 of the upper half 1a are deformed, and at the same time the tape guide boss 1j of the upper half 1a is deformed.
Also, the tape guide boss 1k of the lower half 1b may be tilted, and the tape guide member 4, which is important for tape running, may be fixed in an inclined state.

If the tape guide 4 is fixed at an angle in this way, there are problems in that the running of the tape becomes unstable and the ends of the tape are damaged.

(Means for Solving the Problems) In order to solve the above problems, the present invention has a tape guide member 4 attached to the tape guide bosses 1j and 1k integrally formed with the upper half 1a and the lower half 1b.
A cassette casing 1 formed by inserting and assembling an upper half and a lower half by screw members 5, and a guard provided in the cassette casing so as to be openable and closable to protect the tape exposed on the front surface of the cassette casing. In a tape cassette consisting of a panel 2, a tape guide boss 1 of a half (for example, the upper half 1a) into which the tape guide member is inserted and fixed
j, and a vertical wall surface provided in a half facing the vicinity of this tape guide boss, for example, 7-1, 7-2
For example, 6-1,
6-2 is integrally formed on a half.

(Embodiment) Figs. 1 to 4 show an embodiment of the tape cassette according to the present invention, in which Fig. 1 is a bottom view of the upper half forming a part of the tape cassette,
3 and 3 are enlarged bottom views showing the vicinity of the tape guide member in FIG. 1, and FIG. 4 is a cross-sectional view of the main parts of the tape guide member before screw tightening. In the figure, the same components as those of the conventional tape cassette described above are designated by the same reference numerals, and the explanation thereof will be omitted.

As shown in FIGS. 1, 2, and 3, tape guide bosses 1j are erected on the tape supply side 1c and take-up side 1d of the upper half 1a of the tape cassette, respectively. Further, between the base 1m of the tape guide boss 1j (the part corresponding to the seat of the tape guide boss 1j) and the vertical wall surfaces 7-1 and 7-2 near these tape guide bosses 1j, there is a space between the base 1m of the base 1m. Reinforcing ribs 6- with the same height or less
1 and 6-2 are respectively constructed.

By providing these ribs 6-1 and 6-2, as shown in FIG.
Even if there is a gap Z between a and the card panel 2a, the stepped surface portion 1e will not be deformed, and the tape guide member 4 will not be tilted and fixed. In other words, even when screws are tightened in the same way as before, the reinforcing ribs 6-1, 6-
2, the rigidity of the upper half 1a is improved, and the tape guide boss 1j (1k) and the tape guide member 4 can be fixed vertically without tilting.

Therefore, in this tape cassette,
Since stable tape running is possible and the ends of the tape are not damaged, it is convenient to use as a tape cassette for a video tape recorder.

In addition, in the description of the embodiment of the present invention, the shape of the rib is made into a plate shape as shown in FIGS. It is something that can be freely chosen within a range that does not deviate.

(Effect of the invention) In the tape cassette of the invention, the tape guide member is inserted into the tape guide boss formed integrally with the upper half and the lower half, and the upper half and the lower half are assembled and connected by a screw member. In the tape cassette, the tape cassette includes a cassette casing made of Since a reinforcing rib is integrally formed on the half and is built between the tape guide boss and the vertical wall surface provided on the half opposite to the tape guide boss, this reinforcing rib is Therefore, even if there is a gap between the upper half and the card panel, as in the conventional case, the stepped surface portion of the upper half will not be deformed, so the tape guide member will not be fixed in an inclined manner. That is, even when screws are tightened as in the conventional case, the stiffness of the upper case is improved by providing the reinforcing ribs, and the tape guide boss and the tape guide member can be fixed vertically without tilting.

Therefore, the tape cassette according to the present invention has the advantage of being able to provide a tape cassette with good performance and quality, which allows stable tape running and prevents damage to the tape ends.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the tape cassette according to the present invention. FIG. An enlarged partial bottom view, FIG. 4 is a sectional view of the main part of the tape guide member before screw tightening, FIG. 5 is an overall perspective view of a conventional tape cassette, and FIG. 6 is an upper half view of the tape guide member. , a rear perspective view mainly showing screw tightening positions for assembling and connecting the lower halves, FIGS. 7 and 8.
The figures are cross-sectional views showing the tape guide member of a conventional tape cassette in a state in which the screws are tightened. FIG. 7 is a view showing the state before the screws are tightened, and FIG. 8 is a view showing the state after the screws are tightened. 1...Cassette housing, 1a...Upper half, 1b
...Lower half, 1j...Tape guide boss of upper half, 1k...Tape guide boss of lower half, 2
... Guard panel, 4 ... Tape guide member, 5
...Screw member (screw), 6-1, 6-2...Reinforcing rib, 7-1, 7-2...Vertical wall surface.

Claims (1)

[Claims for Utility Model Registration] A cassette casing in which a tape guide member is fitted into a tape guide boss formed integrally with the upper half and the lower half, and the upper half and the lower half are assembled and connected by screw members. and a tape cassette comprising a guard panel that is openable and closable in the cassette housing and protects the tape exposed on the front surface of the cassette housing, a half tape guide boss into which the tape guide member is fitted and fixed; A tape cassette characterized in that a reinforcing rib is integrally formed on the half and extends between the tape guide boss and a vertical wall surface provided on the half opposite to the tape guide boss.