JPS63179480A - Tape cartridge - Google Patents

Abstract

PURPOSE:To attain tape protection while a front cover is opened unexpectedly through automatic closing by always giving torque in the closing direction to the front cover independently of the open angle to simplify the front cover switching operation mechanism of the deck side. CONSTITUTION:A pin 13 projected to the position biased from a rotary shaft 7 at the side wall piece 5 of the front cover 4 is pressed by a tip ridge 11a of a slider 11 on the outer face of the side wall 6. Thus, the slider 11 is assembled compactly and simply by utilizing the dead space on the outer face of the side wall 6 effectively. Even if the front cover 4 is opened unexpectedly and the cover is closed automatically, the tape is protected sufficiently.

Description

[Detailed Description of the Invention] [Field of Industrial 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 so that it can be opened and closed, and the opening and closing mechanism of the front cover has been improved. It is something that

[Conventional technology]

Conventionally, as this type of tape cartridge, a small video tape cartridge as shown in FIGS. 6 and 7 has been proposed (for example, Japanese Utility Model Application Publication No. 59-5077 and Japanese Utility Model Application Publication No. 59-20489). , in which one set of left and right glue reels 2 is housed in a nine-body case 1, and each reel 2 is
Lead out the tape 3 wrapped around the body case 1 to the front side of the main body case 1,
The tape 3 should be protected (the front cover 4 is attached to the main body case 1).

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. The upper end portions of the main body case 1 are rotatably connected to the upper front ends of the outer surfaces of the left and right side walls 6, 6 of the main body case 1 by means of a rotation shaft 7 such as a roll pin.

An opening/closing holding means is provided between one side wall piece 5 of the front M4 and the side wall 6 of the main body case l to hold the front lid 4 in an upwardly open position and a closed position, respectively.

The opening/closing holding means for the front lid 4 includes an open posture holding surface 8a and a closed posture holding surface 8b formed on the upper end surface around the rotating shaft 7 of the side wall piece 5 of the front cover 4 and the rear end surface perpendicular thereto; A horizontal groove 9 and a vertical groove 10 are formed on the outer surface of the side wall 6 at the rear of the side wall piece 5, and a slider 11 is fitted into the horizontal groove 9 so as to be slidable in the front and rear direction, and a U A letter-shaped plate spring 12 is inserted from above the groove, and the spring 12 constantly moves and biases the slider 11 forward, so that the front end surface 11a of the slider 11 is pressed against the open posture holding surface 8a or the closed posture holding surface 8b. It becomes like touching. In such a case, the closed position of the front cover 4 will be
As shown by the solid line in FIG. 7, the slider 11 is held by bringing the front end surface 11a into contact with the closed posture holding surface 8b and pressing the front M4 in the closing direction. As shown in FIG. 6, as the front cover 4 rotates upward, a posture switching point 8 is located at the corner where the open posture holding surface 8a and the closed posture holding surface 8b intersect.
C 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 center center line S passing through the rotating shaft 7, the slider 11 moves to the spring 12.
As shown by the imaginary line in FIG. 7, the front end surface 11a comes into contact with the open position holding surface 8a, thereby holding the front cover 4 in the upwardly open position. When the front lid 4 is rotated from the top open state to the closing direction, the switching point 8c slides on the front end surface 11a of the slider 11 and moves the slider 11 backward, and when the switching point 8c crosses the dead center center point S, The slider 11 moves forward by the force of the spring 12, and its front end surface 11a contacts the closed position holding surface 8b as described above to return the front cover 4 to its original position and hold it in the closed position.

In this manner, when maintaining the closed position of the front cover 4, the side wall piece 5 of the front cover 4 is used, and the pressing force applying members of the slider 11 and the spring 12 that apply a rotational force in the closing direction to the side wall piece 5 are attached to the main body case 1. By attaching it to the outer surface of the side wall 6, it can be assembled compactly and easily by utilizing the dead space on the outer surface of the case, compared to a case in which a pressing force applying member is installed inside the main body case 1. This is especially advantageous for small tape cartridges.

[Problem that the invention seeks to solve]

However, in the above-mentioned opening/closing mechanism for the front lid 4, when the front lid 4 is opened, this opening position is maintained by the opening position holding surface 8 of the side wall piece 5.
a and the slider 11. Therefore, leave the front lid 4 open and leave it as it is.
For example, it is suitable when used by loading it into an adapter.

However, it is somewhat difficult to load the camera into a video deck or video camera with the front lid 4 closed, and then to take it out with the front lid 4 closed. That is, when this tape cartridge is loaded into a deck or the like, the operating member on the deck side is operated in the direction of arrow A in FIG. It is necessary to close the front cover 4 by pushing it in a direction B that is different from the operating direction A.

Therefore, there is a drawback that the front cover opening/closing operation mechanism on the deck side becomes complicated.

Furthermore, if the front cover 4 is accidentally opened by the user, it remains open, causing the tape 3 to lose its protective function.

This invention was made to solve this problem, and in order to make the tape cartridge smaller and easier to assemble, basically, as with the conventional tape cartridge, a tape cartridge is installed on the outer surface of the side wall of the main body case. The front lid can be opened and closed on the deck side by using a mechanism that uses the side wall pieces of the front lid to close and bias it, and then applying a rotational force to the front lid in the closing direction regardless of its opening angle. To simplify a mechanism and to automatically close a front cover even if it is accidentally opened, thereby providing sufficient tape protection.

[Means for solving problems]

In order to achieve the above objectives, this invention.

A side wall piece 5 of the front side 1i4 for opening and closing the front side of the main body case 1 is pivoted on the outer surface of the side wall 6 of the main body case 1 so as to be rotatable around a rotating shaft 7, and using the side wall piece 5 of the front lid 4. It is assumed that a rotational force in the closing direction is always applied to this. That is, the slider 11 should be slidably mounted on the outer surface of the side wall 6 so as to be urged to move in a direction approaching the rotating shaft 7.

A pin 13 is provided on the side wall piece 5 at a position offset from the rotating shaft 7 so as to be in sliding contact with the tip edge 11a of the slider 11 as the front cover 4 is rotated to open and close.
When a pressing force of 1 is applied, a rotational force in the closing direction is always generated on the front cover 4.

Here, it is recommended to provide a recess 14 on a portion of the tip edge 11a of the slider 11, into which the pin 13 falls and engages in order to maintain the closed posture of the front lid 4, to prevent the front lid 4 from opening accidentally due to external force. This is preferable for preventing.

In addition, the pin 13 may be provided on either the inner surface side or the outer surface side of the side wall piece 5.

[Effect]

In such a case, if you push the front cover 4 in the opening direction with the operating member on the deck at the same time or while loading this tape cartridge on the deck, the front cover 4 will open so that the pin 13 slides on the tip edge 11a of the slider 11. The front cover 4 is kept open by pushing it back and stopping the operating member at the open position in the fully opened state. Since a rotational force in the closing direction is applied to the tape cartridge, when the tape cartridge is removed, the front cover 4 is automatically closed by simply moving the operating member away from the front cover 4.

〔Effect of the invention〕

As explained above, according to the present invention, the pin 13 protruding from the side wall piece 5 of the front lid 4 at a position offset from the rotating shaft 7 is
Since the slider 11 is pressed by the tip edge 11a of the slider 11 on the outer surface of the side wall 6 to always generate a rotational force in the closing direction on the front cover 4, the slider 11 is pressed against the outer surface of the side wall 6, as in the conventional existing product. The advantage is that it can be compactly and easily incorporated by effectively utilizing the dead space above, and it can also be pushed open as an opening/closing mechanism for the front cover 4 inside a video deck or video camera. Just having one operating member is sufficient.

The front cover opening/closing operation mechanism can be significantly simplified. Furthermore, even if the front cover 4 is accidentally opened, it is automatically closed, so there is an advantage that the tape can be sufficiently protected.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

Since the overall structure of the tape cartridge is almost the same as the conventional one described above, the same reference numerals are given and the explanation thereof will be omitted, and only the differences from the side wall piece 5 of the front cover 4 and the slider 11 of the conventional one will be described. explain.

On the front lid 4 side, a pin 13 is provided protrudingly on the inner surface of the upper end of the side wall piece 5 at a position offset from the rotating shaft 7.

On the other hand, on the outer surface of the side wall 6 of the main body case 1.

A horizontal groove 9 is provided at the rear position of the side wall piece 5, and a slider 11 is fitted into this groove 9 so as to be freely slidable in the front and rear direction.

A U-shaped spring 12 is installed in a vertical groove 10 provided on the rear end side of the horizontal groove 9, and this spring 12 biases the slider 11 to move forward. This slider 11 and pin 13 are connected to the front cover 4.
Regardless of the opening angle, the tip edge 11a of the slider 11 always presses the pin 13, so that a rotational force in the closing direction is always generated on the front cover 4. That is, the pin 13 is formed to have an elliptical cross section or a similar shape, and
It is provided protrudingly on the side wall piece 5 so that the long axis direction of the elliptical cross section is oriented in a predetermined direction. Thus, before! ! 4 is in a completely closed state, press and contact one end side of the pin 13 in the elliptical long axis direction at a position close to the upper end on the tip edge 11a of the slider 11, and press the front 1i4.
Apply light force once in the closing direction.

As the front cover 4 is opened, the pin 13 rotates around the rotating shaft 7 and slides downward on the tip edge 11a, and when the front cover 4 is opened completely (90@), the pin 13 moves on the tip edge 11a. The tip edge 11a is moved to a position near the lower end of the pin 11a, and at this time, the tip edge 11a is placed on the other end side in the long axis direction of the elliptical cross section of the pin 13.
comes into contact with pressure.

This allows a rotational force in the closing direction to still be applied to the front lid 4.

[Another example]

FIG. 3 shows a modified embodiment of the slider 11, in which a recess 14 is provided at the location where the pin 13 on the tip edge 11a of the slider 11 is located when the front lid 4 is in the closed position.
4 so that the pin 13 falls into and fits into the hole. According to this, the closed posture of the front M4 is reliably maintained,
This prevents the front cover 4 from opening due to unexpected external force. In this case, when opening the front cover 4 using the operating member on the deck side, apply a slightly strong operating force to the pin 13 at the beginning of opening the cover.
All you have to do is remove it from the recess 14.

FIG. 4 shows yet another modified embodiment of the slider 11, in which the lower end on the tip edge 11a is formed into a concave curved surface R, and when the front lid 4 is in the open state, the concave curved surface R is By press contact with the pin 13, a rotational force in the closing direction is applied to the front M4. According to this, the pin 13 may be formed to have a circular cross-sectional shape or other shapes.

Figure 5 shows the mounting location of the slider 11 changed,
In each of the embodiments described above, the slider 11 is attached to the rear position of the side wall piece 5 on the outer surface of the side wall 6 so as to be slidable in the front and rear direction, but in this embodiment, the slider 11 is mounted at the lower position of the side wall piece 5 on the outer surface of the side wall 6. The pin 13 is mounted so as to be slidable in the vertical direction, and the pin 13 is set in a corresponding position.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention,
FIG. 1 is a partial side view of the tape cartridge, and FIG. 2 is a side view of the main parts. Both FIG. 3 and FIG. 5 are side views of essential parts showing other embodiments of the present invention. 6 and 7 show a conventional tape cartridge. FIG. 6 is a perspective view of the tape cartridge with the front cover in the middle of opening and closing, and FIG. 7 is a side view of the main parts. ■・・・・・・Body case. 4...Front lid. 5...Side wall piece. 6...Side wall. 7...Rotation axis. 11...Slider. 11a... Tip edge. 12...Spring. 13. ・Pin. Inventor Yuki Yamanaka Jitsuka Hikaru Mizutani Patent application
People Hitachi Maxell Ltd. Figure 1 Figure 5 Figure 6 Figure 7 I A

Claims (2)

[Claims] (1) The upper end portion of the side wall piece 5 of the front cover 4 that opens and closes the front side of the main body case 1 is pivoted on the outer surface of the side wall 6 of the main body case 1 so as to be rotatable around a rotating shaft 7, and the outer surface of the side wall 6 A slider 11 is slidably mounted on the top so that it is urged to move in a direction near the rotating shaft 7, and the front cover 4 is rotated to open and close at a position offset from the rotating shaft 7 on the side wall piece 5. Accordingly, a pin 13 is provided that protrudes and comes into sliding contact with the tip edge 11a of the slider 11, and the pressing force of the slider 11 is constantly applied to the pin 13, thereby constantly applying a rotational force in the closing direction to the front cover 4. A tape cartridge characterized by: (2) The front cover 4 is attached to a part of the tip edge 11a of the slider 11.
2. The tape cartridge according to claim 1, further comprising a recess 14 into which a pin 13 is depressed and engaged to maintain the tape cartridge in the closed position.