JPH0424542Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tape cassette suitable for use as a tape cassette for, for example, a video tape recorder.

(Prior Art) A tape cassette having a conventional structure has an upper half and a lower half 1, as shown in the overall perspective view in FIG.
A and 1b form a cassette casing 1, and the front surface of the cassette casing 1 is covered with a guard panel 2 rotatably supported.

This guard panel 2 includes an upper plate part 2a and a front plate part 2b.
and a side plate portion 2c, and when the cassette is not in use, it is held in the closed state by a locking mechanism (not shown) provided within the cassette housing 1.

Figure 6 shows a cassette case 1 as shown in Figure 5.
It is a rear perspective view mainly showing the screw tightening positions for joining the upper and lower halves 1a and 1b forming the upper and lower halves 1a and 1b. (also sometimes called) screw hole portion 1f corresponding to
The upper and lower halves 1a and 1b are connected by rotationally inserting screws 5 into the other screw holes 1g.

(Problems to be solved by the invention) Figures 7 and 8 are similar to the above-mentioned figures 5 and 6.
FIG. 7 is a cross-sectional view of the main part showing the state of screw tightening in the tape guide shaft portion of the conventional tape cassette shown in the figures, and FIG. 7 is a view showing the state before screw tightening;
FIG. 8 is a diagram showing the state after screw tightening.

In order to form the cassette housing 1 in this type of conventional tape cassette, as shown in FIG.
In this case, the inclined portion 1 formed in the longitudinal direction of the upper half 1a is rotated and inserted.
Stepped portion 1e formed by e ₁ and flat portion 1e ₂
A slight gap a is formed between (mainly the flat portion 1e ₂ ) and the inner surface 2a' of the upper plate portion 2a of the guard panel 2. That is, the guard panel 2 is provided to protect the magnetic tape exposed on the front surface of the cassette housing 1, and the lower end of the guard panel 2 ( lower half 1
It is desirable that the b) side is in contact with the lower half. Therefore, this guard panel 2 is normally biased in the direction of closing the lid by a spring (not shown), and the degree of freedom in design is determined by taking into account the installation accuracy of the spring, the molding conditions of the guard panel, etc. In order to have the above-mentioned stepped portion 1e
A gap a is formed between the inner surface 2a' and the inner surface 2a'. In addition, generally, this type of tape cassette has magnetic tape inside, so
After the upper and lower halves 1a and 1b are assembled using the screws 5, the screws 5 are rarely removed.

Furthermore, in order to firmly fix the upper and lower halves 1a and 1b in this kind of tape cassette,
Normally, the part that becomes the screw hole provided in the upper half 1a is called a blind hole and is not threaded.
It is formed smaller than the threaded portion of the screw 5. Therefore, when connecting the upper and lower halves 1a and 1b with the screws 5 to form a tape cassette with the tape guide member 4 installed in an appropriate position, when the screws 5 are tightened, the screws 5 The tip head of the screw portion contacts the portion of the upper half 1a that will become the screw hole.

At this time, since there is no part between the upper half 1a and the guard panel 2 to stabilize the position in the height direction (thickness direction of the tape cassette), the gap a remains as it is. When the screw 5 is further tightened, the tip of the flat part 1e ₂ (the part provided on the front plate part 2b side of the guard panel 2 in FIG. 7) is attached to the upper plate part 2a of the guard panel 2.
After contacting the inner surface 2a' of the upper half 1a, the two fulcrums of the inclined portion 1e1 of the upper half _1a , that is, the inclined portion _1e1
and the intersection of the flat part 1e ₂ and the longitudinal direction of the sloped part 1e ₁ and the upper half 1a on the opposite side of this intersection. The boss portions 1a 1 and 1b 1 of the upper and lower halves _1a and _1b are deformed (tilted) by the corresponding gap a', and therefore the tape guide member 4 attached thereto is also fixed in an inclined state. (the state shown in Figure 8).

As described above, since the tape guide member 4 is fixed at an angle, there is a problem that the tape running becomes unstable and the tape ends are damaged.

(Means for Solving the Problems) The present invention was made in view of the above problems, and is formed of upper and lower halves 1a and 1b, and the upper and lower halves 1a and 1b are connected to tape guide members 4. In the tape cassette, the upper half 1a or the guide panel has a guard panel 2 which constitutes a cassette housing 1 by being connected by a screw member 5 through the tape cassette and protects the tape exposed on the front surface of the cassette housing 1. Projections 1c ₁ , 1c ₂ , 2 are provided at positions corresponding to the tape guide members 4 of No. 2.
The present invention provides a tape cassette characterized in that d ₁ and 2d ₂ are provided.

(Example) Figures 1 to 4 show an embodiment of the tape cassette according to the present invention. Figure 1 is an overall perspective view with the guard panel opened, and Figure 2 is an embodiment of the tape cassette according to the present invention. FIGS. 3 and 4 are a perspective view of the entire guard panel constituting a part of the tape cassette according to the present invention, and sectional views of the main parts of the tape cassette according to the present invention, showing the state in which the screws are tightened at the tape guide shaft, Third
The figure shows the state before screw tightening, and FIG. 4 shows the state after screw tightening. In addition, the same reference numerals are attached to the same components as those of the conventional example described above in the figure, and detailed explanation thereof will be omitted.

In FIG. 1, at a position corresponding to the tape guide member 4 on the front side (guard panel 2 side) of the upper half 1a of the cassette housing 1 formed by the upper and lower halves 1a and 1b, there is a convex portion 1c ₁ , 1c ₂ is provided as a pair with it. Note that the protrusion height of the convex portions 1c ₁ and 1c ₂ is formed to be the same height as the gap a created between the tape guide members 4 of the upper half 1a and the lower half 1b.

FIG. 2 is an overall perspective view of the guard panel 2 constituting a part of the tape cassette of the present invention, in which projections 2d ₁ and ₂ have the same purpose as the projections 1c 1 and 1c ₂ in FIG.
d ₂ is the back surface 2a ₁ of the upper plate part 2a of this guard panel 2
are integrally formed at positions corresponding to the tape guide member 4. Note that this protrusion 2d ₁ ,
It goes without saying that the protrusion height of 2d ₂ is also the same as that of the above-mentioned convex portions 1c ₁ and 1c ₂ .

In such a configuration, the upper and lower halves 1a,
1b with, for example, a screw 5 to form the cassette housing 1, the screw 5 is rotated and inserted into the screw hole 1f corresponding to the shaft of the tape guide member 4 as shown in the third figure. , a convex portion 1 is provided at a position corresponding to the tape guide member 4 on the back surface of the upper half 1a or the upper plate portion 2a of the guard panel 2.
c ₁ , 1c ₂ or protrusions 2d ₁ , 2d ₂ are provided, so for example, the stepped portion 1e and the inner surface 2 of the guard panel
Since there is no gap formed between the upper half 1a and the tape guide a', the position of the upper half 1a is regulated. The member is fixed vertically between the upper and lower halves without tilting.

Therefore, in the tape cassette according to the present invention, the tape can be run stably, so that the tape ends are not damaged and can be conveniently used as a tape cassette for a video tape recorder.

In addition, in the description of one embodiment of the present invention, an example in which a plurality of convex portions (protrusions) are provided on the upper half 1a or the guard panel 2 has been explained, but the invention is not necessarily limited to this. The shape can also be freely selected without departing from the spirit of the present invention.

(Effects of the invention) As detailed above, the tape cassette according to the invention has a protrusion at a position corresponding to the tape guide member of the upper half or guard panel, so the upper and lower halves can be screwed together. When connected to form a cassette housing, the position of the upper half is regulated by this protrusion, so the tape guide member can be fixed vertically between the upper and lower halves, resulting in stable tape running. There is an advantage that a cassette can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view showing an embodiment of the tape cassette of the present invention, FIG. 2 is an overall perspective view of a guard panel forming a part of the tape cassette of the invention, and FIGS. 3 and 4. 3 is a cross-sectional view of a main part showing a state in which the tape guide member of the tape cassette according to the present invention is tightened with screws, FIG. 3 is a view showing the state before tightening the screws, FIG. 4 is a view showing the state after tightening the screws, FIG. 5 is an overall perspective view of a conventional tape cassette, FIG. 6 is a rear perspective view mainly showing screw tightening positions for joining the upper and lower halves forming the tape cassette shown in FIG. 5, and FIG. FIG. 8 is a cross-sectional view of the main part of the tape guide member of a conventional tape cassette showing the 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. It is. 1...Cassette housing, 1a...Upper half, 1b
... lower half, 1c ₁ , 1c ₂ ... protrusion, 2 ... guard panel, 2d ₁ , 2d ₂ ... protrusion, 4 ... tape guide member.

Claims (1)

[Scope of utility model registration request] It is formed of upper and lower halves 1a and 1b, and on top of this,
A cassette housing 1 is constructed by connecting the lower halves 1a and 1b via a tape guide member 4 with a screw member 5, and a guard panel 2 is provided on the front surface of the cassette housing 1 to protect the exposed tape. In the tape cassette, protrusions 1c ₁ , 1c ₂ , 2d ₁ ,
A tape cassette characterized by having _2d2 .