JPS6310387A - Tape cartridge - Google Patents

Abstract

PURPOSE:To eliminate limits to assembly by fitting a lock slider in a lateral groove in an outer surface direction perpendicular to the direction of a sliding a slider. CONSTITUTION:Since a notch part 13 and a slider slip-off preventing piece 14 are provided on at least one place on the slider 11 and the opening edge of the lateral groove of a side wall 6, respectively, the slider 11 can be fitted in the lateral groove 9 in the outer surface direction perpendicular to the direction of sliding the slider. Thus the slider 11 can be assembled regardless of the assembly of other parts (a front cover 4, a rotating shaft 7, etc.), whereby any assembling methods can be adopted. Besides, the rotating shaft 7 can be integrally and protrudingly installed from a main body case 1. As a result costs can be reduced. Since the notch part 13 is freely provided with a taper, the high assembling accuracy is not needed, which is required in a conventional method, and the assembling stability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a tape cartridge in which a front cover for protecting the tape is attached to the front side of the main body case.

The ease of assembling the front cover has been improved.

[Conventional technology]

Conventionally, as this type of tape cartridge, a small video tape cartridge cartridge as shown in FIG. 5 and FIG. Public bulletin). There, one set of left and right reels 2 is housed in a three-body case 1, and each reel 2
Lead out the tape 3 wrapped around the body case 1 to the front side of the main body case 1,
A front cover 4 is attached to the main body case 1 to protect the tape 3.

This front cover 4 is formed into a flat plate shape that covers the tape 3 led out to the front side of the main body case 1, and has side wall pieces 5,5 extending rearward from its left and right ends. is rotatably mounted on the outer surface of each front end of the left and right side walls 6, 6 of the main body case 1 by a rotation shaft 7 formed by a roll pin or the like. and,
Between one side wall piece 5 of this front cover 4 and the side wall 6 of the main body case 1.

The front lid 4 can be held in an open position and a closed position, respectively.

The opening/closing holding means for the front lid 4 is formed by forming cam surfaces 8a and 8b for posture switching on the upper end surface around the rotating shaft 7 of the side wall piece 5 of the front lid 4 and on the rear end surface orthogonal thereto, and on the side wall of the front lid 4. On the outer surface of the side wall 6 at the rear of the piece 5 there are transverse grooves 9 and longitudinal grooves 1.
0 are arranged in front and behind each other, and a lock slider 1 is installed in the lateral groove 9.
1 into the vertical groove 10 so as to be slidable in the front and back direction.
A U-shaped spring 12 is incorporated in the lock slider 12, and the lock slider 11 is constantly urged forward by the spring 12, so that the front end surface 11a of the slider 11 is pressed into contact with the cam surfaces 8a and 8b. In this case, the front cover 4 is in the closed position when the lock slider 11 brings the front end surface 11a into contact with the cam surface 8b to press and bias the front cover 4 in the closing direction, as shown by the solid line in FIG. As shown in FIG. 5, as the front cover 4 rotates to open upward, the attitude switching point 8c at the corner where the cam surfaces 8a and 8b intersect slides on the front end surface 11a of the lock slider 11. retreat,
When the switching point 8c crosses the dead center center line P passing through the rotating shaft 7, the slider 11 moves forward by the force of the spring 12, and as shown by the imaginary line in FIG. The front cover 4 is held in an upwardly open position by making contact with the front cover 4. Front lid 4
When rotated from the upward open state to the closed direction, switching point 8c
moves the slider 11 backward while sliding on the front end surface 11a of the slider 11, and when the switching point 8c crosses the dead point center line P, the slider 11 moves forward by the force of the spring 12 and moves its front end surface 11c as described above. The front cover 4 is held in the closed position by contacting the cam surface 8b in this manner.

[Problem that the invention seeks to solve]

However, with the above-mentioned opening/closing holding means for the front lid 4.

Generally, as shown in FIG. 8, the cross section of the lateral groove 9 is a trapezoidal dovetail groove, and the cross section of the lock slider 11 has a similar shape. - Prevents it from coming out from between 9b in the outward direction of arrow A. Therefore, the lock slider 11 is connected to the horizontal groove 9.
To attach it to.

Slider 1 from the front of main body case 1 as shown in FIG.
The only way was to insert it in the sliding direction of No. 1. For this reason, there are restrictions on the assembly method in that the slider 11 must be mounted before the rotating shaft 7 and the front cover 4 are assembled. Furthermore, as a cost reduction measure, it is conceivable to integrally mold the rotating shaft 7 from the side wall 6 of the main body case 1;
This method cannot be used because it becomes a hindrance when inserting it into the computer. Furthermore, the positioning accuracy when inserting the slider 11 must be kept below the clearance between the lock slider 11 and the lateral groove 9.

While assembly requires precision, dimensional variations are most likely to occur in the left and right longitudinal directions of the main body case 1.

When attempting to automate the assembly, there were problems such as a lack of assembly stability.

[Purpose of the invention]

This invention was made to solve these problems, and by making it possible to fit the lock slider into the lateral groove from the outer surface direction perpendicular to the sliding direction of the slider, one assembly is possible. In addition, the rotating shaft can be integrally protruded from the main body case to reduce the cost, and the assembly is more stable.

[Means for solving problems]

The present invention is based on a tape cartridge having a two-body case 1 and a front cover 4 for opening and closing the front side of the tape cartridge. The front cover 4 has a side wall piece 5 pivotally mounted on the outer surface of the side wall 6 of the main body case 1 so as to be rotatable about a rotating shaft 7. A lateral groove 9 having a U-shaped cross section is provided at the rear of the side wall piece 5 in the side wall 6.
The lock slider 11 is slidably fitted in the front-rear direction, and the slider 11 is biased to move forward by the force of the spring 12 and comes into contact with the side wall piece 5, so that the front cover 4 can be placed in a closed position or an open position. Each will be retained. Specifically, cam surfaces 8a and 8b for attitude switching are formed on the side wall piece 5, and the front end surface 11 of the lock slider 11 is formed on the cam surfaces 8a and 8b.
A is pressed into contact with the force of the spring 12 to hold the front cover 4 in the closed position and the open position, respectively.

Furthermore, in the present invention, a notch 13 is provided at least at one location on the upper edge or the lower edge of the slider 11, and the notch 13 of the slider 11 is provided at the opening edge of the lateral groove 9 of the side wall 6.
It is provided with a slider retaining piece 14 through which only the slider 3 can be inserted and which prevents the portion other than the notch 13 from coming out of the lateral groove 9.

[Effect]

At this time, the lock slider 11 is fitted into the lateral groove 9 from the outer surface direction perpendicular to the slider sliding direction by aligning the notch 13 with the position of the slider retaining piece 14,
In addition, since the fitting rear opening vine slider 11 is moved forward by the force of the spring 12, the portion of the slider 11 other than the notch 13 slips under the retaining piece 14, so that the slider 11 is moved under the opening of the horizontal groove 9. There is no possibility of it slipping out between the edges 9a and 9b.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

The overall structure of the tape cartridge and the opening/closing mechanism of the front lid 4 are substantially the same as those of the conventional tape cartridge described above.
The same reference numerals are used to omit the explanation, and only the differences from the conventional lock slider 11 and lateral groove 9 will be explained.

In FIGS. 1 and 2, the lateral groove 9 provided in the side wall 6 of the two-body case 1 has a simple U-shape in cross section. Then, a vertical groove 10 at the opening upper edge 9a of the horizontal groove 9
A slider retaining piece 14 is provided at the near end, and the opening lower edge 9b
A slider retaining piece 14 is also provided at the frontmost end of the horizontal groove 9.
When viewed in cross section, the slider retaining pieces 1, 4 and 14 are configured to prevent the upper and lower edges of the slider 11 from coming off.

On the other hand, the lock slider 11 is provided with notches 13, 13 at positions corresponding to the slider retaining pieces 14, 14, respectively, and the slider retaining pieces 14, 14 and the notches 13,
The position of the lock slider 11 when the lock slider 13 is fitted is set to be located rearward of the range in which it slides following the movement of the cam surfaces 8a and 8b of the front cover 4.

In such a case, the lock slider 11 should be assembled in the third
When the slider retaining piece 14 and the notch 13 are aligned as shown in the figure, the lock slider 11 can be fitted into the lateral groove 9 from the direction of the outer surface perpendicular to the slider sliding direction. Moreover, since the lock slider 11 is moved forward by the spring force of the spring 12 after it is fitted, the thin portion of the slider 11 rearward of the notch 13 slips under the slider retaining pieces 14 and 14, and the lock slider 11 does not escape from between the upper and lower edges 9a and 9b of the opening of the lateral groove 9.

Incidentally, if the spring 12 is installed in the vertical groove 10 first, it is sufficient to release it from above using a pin or the like only while the lock slider 11 is fitted into the horizontal groove 9.

Alternatively, the spring 12 may be inserted after the lock slider 11 is fitted.

Incidentally, the lock slider 11 after being fitted slides due to the movement of the cam surfaces 8a and 8b as shown in FIG. The piece 14 and the notch 13 are never in the same position, and can always be prevented from coming off.

[Another example]

If the cross section of the notch 13 is formed into a tapered shape as shown in FIG. 4, the lock slider 11 can be fitted even if there is some deviation in the positional accuracy of the slider retaining piece 14 and the notch 13. Furthermore, if the width of the notch 13 is set slightly larger than the width of the slider retaining piece 14 for light press-fitting, the safety against the lock slider 11 coming off can be further enhanced.

〔Effect of the invention〕

As explained above, according to the present invention, the slider 11
A notch 13 is provided at at least one location of the side wall 6.
By simply providing a slider retaining piece 14 on the opening edge of the lateral groove 9, the slider 11 can be fitted into the lateral groove 9 from the outer surface direction perpendicular to the sliding direction of the slider. The lid 41 (rotating shaft 7, etc.) can be assembled regardless of the situation, and there are no restrictions on the method of assembling the lid 41 (rotating shaft 7, etc.), and the rotating shaft 7 can be integrally protruded from the main body case 1, thereby reducing costs. became possible. Furthermore, by arbitrarily providing a taper in the cutout portion 13, there is an advantage that the high precision of the conventional assembly is not required, and the stability of the zero assembly can be improved.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention,
FIG. 1 is a side view of the main parts of the tape cartridge, FIG. 2 is an enlarged sectional view taken along the line nn in FIG. 1, and FIG. 3 is a side view showing a lock slider in the middle of being fitted. FIG. 4 is a side view of essential parts showing another embodiment of the present invention. 5 to 8ffl show conventional tape cartridges, FIG. 5 is a perspective view of the tape cartridge with the front cover in the middle of opening and closing, FIG. 6 is a side view of the main parts, and FIG. 7 8 is a side view showing the fitted state of the lock slider, and FIG. 8 is an enlarged cross-sectional view taken along the line ■-■ in FIG. 1... Main body case. 4...Front lid. 5...Side wall piece. 6...Side wall. 7...Rotation axis. 8a/8b...Cam surface. 9...Horizontal groove. 11...Rock slider. 12...Spring. 13... Notch. 14... Slider retaining piece.

Claims (1)

[Claims] (1) A side wall piece 5 of the front cover 4 that opens and closes the front side of the main body case 1 is pivotally attached to the side wall 6 of the main body case 1 so as to be rotatable around a rotating shaft 7, and is provided behind the side wall piece 5 on the side wall 6. A lock slider 11 is fitted into the lateral groove 9 having a U-shaped cross section so as to be slidable in the front-rear direction, and the slider 11 is biased to move forward by the force of the spring 12 and comes into contact with the side wall piece 5 to close the front lid 4.
In the tape cartridge, the slider 11 is provided with a notch 13 at at least one location, and only the notch 13 of the slider 11 is provided at the opening edge of the lateral groove 9 of the side wall 6. A tape cartridge characterized in that it is provided with a slider retaining piece 14 that can be inserted and that prevents a portion other than the notch 13 from coming out of the lateral groove 9.