JP2506778B2 - Tape cassette - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tape cassette most suitable for use in a magnetic recording / reproducing apparatus such as a video tape recorder.

2. Description of the Related Art Conventional tape cassettes include, for example, Shoukai 60-54
No. 277 is disclosed. FIG. 4 shows a perspective view a and an internal plan view b of this conventional tape cassette. An opening 25 is provided on the front surface of the tape cassette, and lower surface openings 26 are provided on the lower surface of the tape cassette so as to communicate with the front opening 25, and tape guides are provided on both left and right ends of the front opening 25. A section 27 is provided and the tape 3 supplied from the left and right reels 4 is stretched in advance. When using the tape, a tape loading guide (not shown) of the magnetic recording / reproducing apparatus is inserted inside the tape stretched from the lower surface opening portion 26 to the tape guide portion 27, and the tape 3 and the front surface opening portion 25 are inserted. By pulling out to the front of the tape cassette, the tape 3 can be loaded at a predetermined tape running position. Therefore, in order to prevent the tape from being inadvertently exposed to the outside of the tape cassette from the front opening 25 and the lower opening 26 and causing no damage such as dust or the like, the front surface of the front opening 25 is rotatable. A rotating lid 28 is provided, and a slidable lid 29 is slidably provided on the lower surface of the lower surface opening 26. The fourth
The perspective view a in the figure shows a state in which the rotary lid 28 is rotated to remove the sliding lid 29, and the internal plan view b shows a state in which the upper half 1, the rotary lid 28, and the sliding lid 29 are removed. There is.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above configuration, the lower surface opening 26 is provided in the lower portion of the tape cassette, and the tape 3 stretched between the tape guide portions 27 and the left and right reels 4 are provided. A space for inserting a tape loading guide (not shown) of a magnetic recording / reproducing apparatus or the like must be secured, and the tape cassette becomes large by this space, which hinders miniaturization.
Further, providing the rotary lid 28 and the sliding lid 29 for closing the front opening 25 and the lower opening 26 in order to improve the sealing property of the tape cassette complicates the configuration of the tape cassette. Had.

In view of this point, the present invention provides a tape guide pin moving mechanism that eliminates the opening on the lower surface of the tape cassette and secures a space for inserting the tape loading guide of the magnetic recording / reproducing apparatus only when the tape is pulled out. An object of the present invention is to provide a tape cassette which is designed to be miniaturized and to easily improve the sealing property of the tape cassette by sealing the tape with a simple structure having only one front lid. To do.

Means for Solving the Problems The present invention stores a pair of reels around which a tape is wound,
A case provided with a tape guide pin for stretching the tape and a front lid for covering the stretched tape, wherein the tape guide pin is provided on an arm rotatably supported by the case. At the same time, a first sliding guide groove provided on a side portion of the housing for guiding the front lid by a fulcrum pin provided on the front lid, and a slide body engaging with the fulcrum pin of the front lid are provided. The front lid is provided with a second slide guide groove provided in a lower portion of the housing for guiding, and a rotation guide pin provided in the slide body for engaging with a rotation guide groove provided on the arm. The sliding body is slid along with the sliding motion of, and the arm is rotated by the rotation guide pin,
It is a tape cassette configured to move the tape guide pin to a predetermined position.

The tape cassette of the present invention has the above-described configuration, and the tape is sealed in the housing by the front lid when the tape is not used. On the other hand, when the tape is used for recording or reproduction, the front lid is slid, the sliding body is slid along with the sliding movement of the front lid, and the arm is rotated by the rotation guide pin provided on the sliding body. Is moved to a predetermined position. Further, the front lid is rotated around the fulcrum pin to open the front surface of the tape cassette and expose the tape supplied from the reel.

Example An example of the tape cassette of the present invention will be described below.

FIG. 1 is an internal plan view a and b of the tape cassette when the upper half 1 and the front lid 7 of the present embodiment are removed when the tape is not used and when the tape is used for recording / playback, and the tape 3 is a. It is housed in the tape cassette, and in the state of b, it is stretched between the tape guide pins 6 outside the tape cassette. Similarly, FIG. 2 is a side view a and b of the tape cassette when the tape is not used and when it is used,
The front lid 7 rotates upward after sliding on the front surface to open the tape 3. FIG. 3 is an exploded perspective view of the tape cassette of this embodiment as seen from above.

The configuration of the tape cassette of this embodiment will be described.
The tape cassette is a housing composed of an upper half 1 and a lower half 2, and accommodates a pair of left and right reels 4 around which a tape 3 is wound. An opening 5 is provided on one end surface of this tape cassette, and the tape 3 wound around the reel 4 is guided by a pair of tape guide pins 6 provided on both left and right ends of the opening 5, and the opening 5 is formed. The path is formed along 5. The tape path is covered by the front lid 7 when the tape is not used. The front lid 7 has a U-shaped cross section, and fulcrum pins 9 are integrally provided on the side plates 8 at both left and right ends thereof. The fulcrum pin 9 is axially supported by being fitted into a slide guide groove 12a formed when the upper half side wall 10 and the lower half side wall 11 are combined with each other. On the other hand, the tape guide pin 6 for guiding the tape 3 supplied from the left and right reels 4 is installed on the arm 16 pivotally supported by the rotation fulcrum pin 15 on the bottom wall 14 of the lower half. In addition, L-shaped sliding bodies 17 are provided at both ends of the opening 5 in order to interlock the arm 16 and the front lid 7, and the sliding bodies 17 serve as interlocking means with a front lid support portion 18 and a rotation guide pin 19. Is equipped with. The front lid support portion 18 is joined to the fulcrum pin 9 of the front lid 7, and the rotation guide pin 19 is engaged with a rotation guide groove 20 provided in the arm 16.

Next, the operation of the tape cassette of this embodiment will be described. When the tape is not used, the front lid 7 biased forward by, for example, a torsion coil spring is in a state of closing the opening 5 on the front surface of the tape cassette, and the side plate 8 thereof. A part of is contacted with the side walls 10 and 11 of the upper half 1 and the lower half 2, and rotation is prevented so as not to open the opening 5 unnecessarily.

When the tape is used, a projection provided on a cassette holder or the like (not shown) of the magnetic recording / reproducing apparatus is provided in a notch shape on the side plate 8 of the front lid 7 from the lower surface of the tape cassette.
, And the front lid 7 is slid in the front direction of the tape cassette while the fulcrum pin 9 thereof is brought into contact with the slide guide groove 12a on the side surface of the tape cassette. A protrusion 13 is integrally provided on the front surface of the upper half 1 as a stopper for sliding the front lid 7 toward the front surface of the tape cassette. At this time, the slide body 17 in the tape cassette is also pushed by the fulcrum pin 9 against its front lid support portion 18 and slides to the front side, and the rotation guide pin 19 on the slide body 17 also moves. The arm 16 has this rotation guide pin in the rotation guide groove 20.
It is pressed by 19 and rotates about the rotation fulcrum pin 15 on the lower half 2. The tape guide pin 6 on the arm 16 is the tape 3
While being stretched, it is pulled out of the tape cassette through the opening 5. Further, the front lid 7 is pivoted upward around the fulcrum pin 9 against the repulsive force of the torsion coil spring by an appropriate front lid pushing-up means (not shown) to open the opening 5 on the front surface of the tape cassette. Thus, the tape loading post of the magnetic recording / reproducing apparatus can be inserted and the tape 3 can be pulled out to the front of the tape cassette.

On the contrary, at the time of storing the tape, the front lid pushing-up means is released and the front lid 7 is rotated downward by, for example, the reaction force of the torsion coil spring, and the projection provided on the cassette holder or the like is inserted into the front lid pressing portion 22. By pressing the tape cassette toward the rear surface, the front lid 7 is slid to close the opening 5. At this time, the tape guide pin 6 also rotates in conjunction with the front lid 7 and stores the tape 3 in the tape cassette, so that the tape 3 is completely sealed in the tape cassette.

EFFECTS OF THE INVENTION As described above, according to the tape cassette of the present invention, the sliding body is slid along with the sliding movement of the front lid, and the arm is rotated by the rotation guide pin provided on the sliding body.
Since the tape guide pin is moved to a predetermined position to form a space for inserting the tape loading guide of the magnetic recording / reproducing apparatus or the like, the above space is secured in the tape cassette in advance. There is no need to leave it, and the tape cassette can be made smaller and lighter. In addition, with a simple structure that only has a front lid that covers the stretched tape on the front of the tape cassette, the tape can be completely sealed in the tape cassette when the tape is not used, and the tape is damaged by touching it with your fingers. The tape can be surely protected without being attached with dust or the like, and its practical effect is great.

[Brief description of drawings]

1A and 1B are internal plan views of a tape cassette according to an embodiment of the present invention when a tape is not used and when it is used, respectively.
FIGS. A and b are side views of the tape cassette when the tape is not used and when it is used, FIG. 3 is an exploded perspective view of the tape cassette of this embodiment seen from above, and FIGS. 4a and 4b are conventional video tapes, respectively. It is an exploded perspective view and an internal top view of a tape cassette used for a recorder. 1 ... Upper half, 2 ... Lower half, 3 ... Tape, 4 ...
… Reel, 5 …… Opening, 6 …… Tape guide pin, 7
...... Front lid, 16 …… Arm, 17 …… Sliding body.

Claims (1)

(57) [Claims] 1. A pair of reels around which a tape is wound are housed,
A case provided with a tape guide pin for stretching the tape and a front lid for covering the stretched tape, wherein the tape guide pin is provided on an arm rotatably supported by the case. At the same time, a first sliding guide groove provided on a side portion of the housing for guiding the front lid by a fulcrum pin provided on the front lid, and a slide body engaging with the fulcrum pin of the front lid are provided. The front lid is provided with a second slide guide groove provided in a lower portion of the housing for guiding, and a rotation guide pin provided in the slide body for engaging with a rotation guide groove provided on the arm. The sliding body is slid along with the sliding motion of, and the arm is rotated by the rotation guide pin,
A tape cassette configured to move the tape guide pin to a predetermined position.