JPH0510314Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention improves assembly workability by eliminating assembly defects of the slide piece in a tape cartridge equipped with a slide piece to prevent accidental erasure. That's what I was aiming for.

[Prior Art] In various tape cartridges, it is impossible to mount a slide piece 12 to prevent accidental erasure in the main case 1 in which the upper and lower cases 1a and 1b are joined together with lids as shown in FIG. It is publicly known.

FIG. 7 shows the conventional mounting form of the slide piece 12, in which the piece 1 is mounted on the lower case 1b.
2 is dropped and attached so that it can slide freely in the left and right direction along the inner surface of the rear side wall 11 of the case.
Next, the upper case 1a is placed over the lower case 1b to complete the assembly. The piece 12 can be switched by sliding operation to the left and right erasable positions and non-erasable positions through a transparent window 16 in the lower case 1b, and moderation means for holding the piece 12 in these two positions. It is equipped with As the moderation means, an engagement arm 2 is attached to the upper part of the slide piece 12.
2 is extended in a cantilever manner, and the extended end of this arm 22 abuts and engages with the upper case 1a side.

[Problem that the invention attempts to solve]

However, in the conventional example shown in FIG. 7, especially when the tape cartridge is small, the slide piece 12 is also made lighter and smaller, which causes the following problems.

First, in the temporarily assembled state before attaching the piece 12 to the lower case 1b and covering it with the upper case 1a, if a slight impact is received on the assembly line, the piece 12 easily falls sideways in the left and right direction. It is a point.

This falling of the piece 12 is caused by the fact that the piece 12 is simply dropped into the lower case 1b and installed, and there is no means for actively regulating the falling of the piece 12. Further, the engagement arm 22 is connected to the piece 12.
This is also due to the fact that the center of gravity of the entire piece is higher due to the fact that it is located at the top of the piece.

The second piece is the piece 12 temporarily assembled in the lower case 1b.
Since the piece 12 slides on its own and the position is not fixed, it is often necessary to reset the piece 12 to a position where it can be erased, for example, after the upper case 1a is attached, which requires time and effort. .

Thirdly, because of the presence of the engagement arm 22 on the upper part of the piece 12, it is difficult to grasp the extremely small piece 12, making it inconvenient to drop it into a predetermined part of the lower case 1b. Therefore, piece 12
Automatic mechanization of assembly was difficult. This point has also been a cause of poor assembly.

[Purpose of invention]

The present invention has been proposed to eliminate such conventional disadvantages.

An object of the present invention is to provide a tape cartridge that prevents the piece 12 from collapsing or misaligning when it is temporarily assembled in the lower case 1b, thereby preventing assembly failure.

Another object of the present invention is to provide a tape cartridge in which the upper part of the piece 12 can be easily grasped when the piece 12 is attached to the lower case 1b, and the workability of assembling the piece 12 to the lower case 1b can be improved.

[Means for solving problems]

As shown in the figure, the present invention consists of a main body case 1 and upper and lower cases 1a and 1b which are joined together in a lid-like manner, and a slide piece 12 for preventing accidental erasure is provided inside the main body case 1.
This piece body 12a is the side wall 1 of the lower case 1b.
In a tape cartridge that is pre-assembled and slidably slidable between an erasable position and a non-erasable position along the inner surface of the tape cartridge 1, when the slide piece 12 is attached to the lower case 1b, the lower case 1b and the piece body 12a are attached.
The slide piece 12 is provided with moderation means for holding the piece 12 in the erasable position and the non-erasable position, respectively;
A grip piece 25 is provided on the upper surface of the lower case 1b to protrude higher than the side wall 11 of the lower case 1b.

[Effect of idea]

According to the present invention as described above, the lower case 1
When the slide piece 12 is attached to the lower case 1b, a moderation means acts between the lower case 1b and the piece 12 to hold the piece 12 in the erasable position or the non-erasable position in the used state after completion of assembly. Therefore, this moderation means can prevent the piece 12 from collapsing into contact, and will not cause assembly failure.

In addition, since the piece 12 is securely prevented from sliding in the left and right directions unexpectedly within the lower case 1b and becoming misaligned, the piece 12 is placed in an erasable or non-erasable position after the tape cartridge is assembled. The piece 12 is set in one of the positions as planned, and the troublesome effort of resetting the piece 12 to the planned position can be omitted at the same time.

Furthermore, the piece 12 does not need to be provided with an engaging arm 22 or the like that abuts against the upper case 1a as in the conventional example, on the upper part of the piece main body 12a, and instead, the gripping piece 25 itself has a shape that makes it easy to grip. It is formed to protrude higher than the rear side wall 11 of the lower case 1b so that it becomes . Therefore, this grip piece 25
It is possible to very easily assemble the piece 12 to the lower case 1b by holding it in the correct mounting position, and in this respect as well, it is possible to prevent assembly defects and improve the assembly work efficiency, and the automatic mechanization of assembly is possible. development can be easily achieved.

As described above, the present invention has the advantage that even if the slide piece 12 is a small lightweight piece, it can be easily assembled to ensure reliable operation.

〔Example〕

FIG. 6 shows a digital recording and reproducing type tape cartridge as an example of a tape cartridge to which the present invention is applied.

In the figure, reference numeral 1 denotes a main body case formed by connecting upper and lower plastic cases 1a and 1b together with screws or the like. On the left and right sides of the inside of the main body case 1, there are drive shaft insertion holes 3, 3 that are transparently provided in the bottom wall 2 of the main body case 1.
Hubs 5, 5 on which the tape 4 is wound are rotatably mounted. Guide members 6, 6 are provided on the front left and right sides of the main body case 1, and a tape loading pocket 7 is recessed in the front surface of the main body case 1.
A front cover 8 that closes the front of the case is pivotally attached to the main body case 1 so that it can be opened and closed, and the case bottom wall 2
A shutter 9 for opening and closing the pocket 7 is attached to the outer surface of the pocket 7 so as to be slidable back and forth.

In the tape cartridge having this basic structure, an erroneous erasure prevention mechanism 10 for switching between an erasable position and an erasable non-erasable position during use is provided at the rear right corner of the main body case 1 in the figure.

The present invention is characterized by this accidental erasure prevention mechanism 10, and some embodiments thereof will be described next.

[First Embodiment] FIGS. 1 to 3 show a first embodiment of the present invention. In the figure, at the rear right corner of the lower case 1b,
A storage chamber 13 is provided inside the rear side wall 11 into which the slide piece 12 is inserted and mounted from above.

A detection hole 15 is formed in the housing chamber 13 in a penetrating manner in the bottom wall of the case, and a rectangular window 16 is cut out in the rear wall 11 of the case over a certain depth from the upper end thereof.

The slide piece 12 has a height that allows the piece body 12a to almost fit into the storage chamber 13 of the lower case 1b,
Inside the storage chamber 13, the piece main body 12a is guided by the case rear wall 11 and the inner wall 17 opposite thereto, and is slidable between an erasable position and a non-erasable position on the left and right sides.

At least the rear side of the piece main body 12a is formed into a vertical display surface of a different color from the main body case 1, and an operating piece 19 is protruded from the right end of this display surface in the figure so as to face the window 16. .

As shown by the imaginary line in FIG. 3, the slide piece 12 has an operating piece 19 on the right side of the window 16, and a piece body 12a on the opposite inner wall 17 with a stopper 20.
By abutting on each, the sliding limit to the right is regulated. In this state, the detection hole 15 is closed on the lower surface of the piece body 12a, and the window 16 is closed on the rear display surface of the piece body 12a.

On the other hand, the slide piece 12 can be moved to the left by abutting the operating piece 19 on the left side of the window 16 and abutting the piece body 12a on the stopper wall 21 connected to the opposing inner wall 17, respectively, as shown by the solid line in FIG. Sliding limits are regulated. In this state,
The detection hole 15 and the window 16 are each opened.

When the slide piece 12 is preassembled and attached to the lower case 1b, a moderation means is provided between the lower case 1b and the piece body 12a for holding the piece 12 in the left and right erasable positions and the non-erasable position, respectively. has.

As this moderation means, in the figure, the piece body 12a
The engagement arm 22 is attached to the lower left end of the case rear side wall 11.
are installed in a cantilevered manner along the inner surface of the The engaging arm 22 has an engaging claw 23 protruding inwardly at its tip, and can be elastically deformed in the outward and outward directions (in the thickness direction). The lower end of the engagement arm 22 is received by the inner bottom surface of the storage chamber 13. On the other hand, on the lower case 1b side,
A regulating wall portion 26 connected to the stopper wall 21 is provided upright from the case bottom wall 2, and a slit 27 is provided between the regulating wall portion 26 and the rear side wall 11 of the case. Thus, when the slide piece 12 is installed in the storage chamber 13, the engagement arm 22 is in the slit 27, and the distal end engagement claw 23 of the engagement arm 22 is in a position where it comes into elastic contact with the regulating wall 26. It is assumed that there is a relationship.

In addition, the slide piece 12 has a piece body 12.
A flat plate-like knob piece 25 is integrally formed on the upper surface of a to protrude higher than the case rear side wall 11, and the knob piece 25 can be easily held from the front and rear (plate thickness) direction. .

Next, slide piece 1 against main body case 1
2, the piece 12 is installed by grasping the gripping piece 25 at the upper end and dropping it into the accommodation chamber 13 of the lower case 1b from above.

At this time, the piece 12 is set at the leftward sliding limit position with the detection hole 15 and window 16 open. In this state, piece body 1
2a sinks almost entirely into the accommodation chamber 13 with a low center of gravity, and the rear side wall 11 of the case and the opposing inner wall 1
7 prevents it from falling in the front-back direction, and since the lower end of the engaging arm 22 contacts the inner bottom surface of the case and serves as a support, falling to the left side is prevented. In particular, since the distal end engagement claw 23 of the engagement arm 22 wraps around and engages with the left end side of the regulating wall portion 26, this engagement also prevents the entire piece 12 from falling to the right. More piece 1
2 is also effectively prevented from coming into contact with it.

Next, the upper case 1a is placed on the lower case 1b and the two are connected with screws, etc., to complete the assembly, and the piece 12 is now attached to the grip piece 25.
As shown in FIG. 2, the upper end of the piece 12 is closely opposed to the inner surface of the upper case 1a, and ultimately prevents the piece 12 from lifting up and falling down in the left-right direction.

Assume that the built-in tape 4 is set to be erasable (recordable) when the piece 12 is sliding to the left limit, and becomes non-erasable when it is sliding to the right limit.

In such a case, the engagement arm 22 on the piece 12 side
and the regulating wall 26 on the lower case 1b side, the piece 1
Since the moderation means is configured to hold the piece 2 in the erasable position and the non-erasable position, the piece 12 is correctly located at the left erasable position when the assembly is completed.
There is no need to reset the settings due to misalignment. The distal end engagement claw 23 of the engagement arm 22 wraps around and engages with the left end surface of the regulation wall 26, and the piece 1
2 comes into contact with and prevents it from accidentally sliding toward the right non-erasable position.

The piece 12 is slid from the erasable position to the non-erasable position by placing the fingertip on the operation piece 19 facing the window 16. At this time, due to the elastic deformation of the engagement arm 22, the tip engagement claw 23 comes off the left end surface of the regulation wall 26 and slides on the wall surface of the regulation wall 26. It goes around and engages the right end face. This prevents the piece 12 from accidentally moving from the non-erasable position toward the left erasable position.

Incidentally, whether the built-in tape 4 is in the erasable state or the non-erasable state can be visually determined depending on whether the window 16 is opened or closed in the piece body 12a. Further, on the deck side where the tape cartridge is loaded, the detection hole 15 is connected to the piece body 1.
The erasable state and the non-erasable state are determined and operated depending on whether the state is closed or opened at 2a.

[Second Embodiment] FIG. 4 shows a second embodiment of the present invention, in which the engaging arm 22 is provided on the upper part of the piece body 12a, and the remaining structure is substantially the same as that of the first embodiment. I did the same as the example. Even with this, the lower case 1b
When the slide piece 12 is pre-assembled and attached to the slide piece 12, it is possible to effectively prevent the piece 12 from falling in the left-right direction.

[Third Embodiment] FIG. 5 shows a third embodiment of the present invention, in which engaging recesses 29 and 30 are provided on the left and right sides of the inner surface of the rear wall 11 of the lower case 1b, and the engagement recesses 29 and 30 are provided on the left and right sides of the inner surface of the rear wall 11 of the lower case 1b. The distal end engagement claw 23 of the engagement arm 22 selectively engages with the engagement recesses 29 and 30, thereby forming moderation means for holding the slide piece 12 in the erasable position and the non-erasable position, respectively. It has become a thing.

[Another embodiment example]

In each of the above embodiments, the rear wall 11 of the lower case 1b
Although a configuration in which the slide piece 12 slides along the lower case 1b is shown, a configuration in which the piece 12 slides along one of the left and right side walls of the lower case 1b may be adopted.

The detection hole 15 may be opened when the window 16 is closed by the piece body 12a, and the detection hole 15 may be closed when the window 16 is in the open state.

In each of the above embodiments, the slide piece 12 can be pre-assembled and mounted on the lower case 1b with the piece main body 12a closing the detection hole 15 and the window 16, and it is possible to erase the slide piece 12 in this mounted state. May be set.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a partially cutaway perspective view of the main part, FIG. 2 is a longitudinal sectional front view of the main part as seen from the rear, and FIG. FIG. 3 is a partially cutaway plan view of the main part of the slide piece. FIG. 4 is a perspective view of main parts showing a second embodiment of the present invention. FIG. 5 is a perspective view of main parts showing a third embodiment of the present invention. FIG. 6 is an overall plan view showing the internal structure of the tape cartridge to which the present invention is directed. FIG. 7 is a perspective view of main parts showing a conventional example. 1...Main case, 1a...Upper case, 1b...
...Lower case, 12...Slide piece, 12a...
... Piece body, 13 ... Accommodation chamber, 15 ... Detection hole, 16 ... Window, 17 ... Inner wall, 19 ... Operation piece, 22 ... Engagement arm, 23 ... Engagement claw, 25
...Knob piece, 26...Restriction wall part on the lower case side.

Claims (1)

[Scope of Claim for Utility Model Registration] Main body case 1 consists of upper and lower cases 1a and 1b that are joined together in a lid-like manner; Main body case 1 is provided with a slide piece 12 to prevent accidental erasing; Slide piece 12 This is the piece body 12
a is pre-assembled so that it can slide freely along the inner surface of the side wall 11 of the lower case 1b between an erasable position and a non-erasable position, and when the slide piece 12 is attached to the lower case 1b, Piece body 12a
The slide piece 12 is provided with moderation means for holding the piece 12 in the erasable position and the non-erasable position, respectively;
A tape cartridge characterized in that a grip piece 25 is provided on an upper surface of the tape cartridge 1a to project upwardly, the grip piece 25 projecting higher than the side wall 11 of the lower case 1b.