JPH0638087U - Tape cassette - Google Patents

Abstract

(57) [Summary] [Object] To provide a tape cassette equipped with a cleaning mechanism that does not cause slack in the tape. A hub around which a magnetic tape is wound is rotatably mounted inside a case, and a cleaning member such as a non-woven fabric or felt that comes into contact with the magnetic tape is provided on a front wall of the case.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tape cassette, and more particularly to a tape cassette having a tape cleaning mechanism.

[0002]

[Prior art]

 In conventional tape cassettes that have been widely used, since there was no cleaning mechanism for the magnetic tape surface, magnetic powder that had fallen off the magnetic surface of the magnetic tape adhered to the magnetic head of the recording / playback machine, causing clogging. There was a problem that a recording / playback error occurred. In order to deal with this problem, a mechanism for pressing the cleaning member against the tape guide pin or the guide roller has been proposed.

[0003]

[Problems to be solved by the device]

 However, a mechanism that presses the cleaning member against the tape guide pin or the guide roller easily causes a trouble in the tape running path. That is, when the recording / playback device is switched to the stop, some tape drive shafts are set to stop earlier than the capstan roller when the tape is stopped in order to relieve the tension of the tape when not in use. Therefore, tape slack may occur between the part held by the cleaning member on the take-up side and the capstan, and the tape may remain in the head house in the front part of the cassette and other parts. Then, in a cassette with a slide shutter, the tape is sandwiched between U-shaped shutters, or when the tape cassette that was once removed from the recording / playback machine is re-installed in the recording / playback machine, the magnetic tape becomes a capstan roller and pinch roller. There was a problem that I could not come in between. Therefore, an object of the present invention is to provide a tape cassette provided with a cleaning mechanism, in which the tape is not slackened in the front portion of the cassette when used in association with a recorder having an arbitrary drive system. To do.

[0004]

[Means for Solving the Problems]

 According to the present invention, a hub having a magnetic tape wound thereon is rotatably mounted inside a case, and a cleaning member such as a non-woven fabric or felt that comes into contact with the magnetic tape is provided on the front wall of the case. Solve the problem of. The cleaning member should be installed on the tape feeding side rather than the capstan. In particular, in the case of a tape cassette in which a slide shutter having a U-shaped cross section is provided on the front surface of the case, the loose tape on the front surface of the case directly touches the shutter, so the solution of the present proposal is particularly effective. is there. More specifically, in one embodiment, the cleaning member of the present invention is attached to a base member, the front wall of the case is provided with an accommodating portion that fits with the base member, and the base member is the accommodating portion. Is fitted to. According to another embodiment, a cleaning member of the present invention is attached to a base member, a notch is provided in a front wall of a case, and the base member is fitted and fixed to the notch. . According to another embodiment of the present invention, a hub around which a magnetic tape is wound is rotatably mounted inside a case, and a magnetic head enters the front wall of the case and contacts the magnetic tape. In the tape cassette provided with an opening for cleaning, a cleaning member such as a non-woven fabric or felt which is in contact with the magnetic tape adjacent to the magnetic head is provided integrally with the magnetic head.

[0005]

[Function of the device]

 According to the present invention, unlike the conventional cleaning member, when the tape is stopped, the braking force against the tape does not act on the front surface of the tape cassette, so that the slack of the tape does not occur on the front surface of the tape cassette and the slack occurs inside the cassette. It is possible to solve the conventional problems.

[0006]

[Explanation of Examples]

 Hereinafter, embodiments of the present invention will be described in detail. Embodiment 1 First, the overall construction of the tape cassette of the present invention will be described with reference to FIGS. FIG. 1 is a plan view of a tape cassette having a slide shutter according to the present invention, and FIG. 2 is a plan view with an upper case and a shutter removed to show the inside thereof. The present invention can be applied to a tape cassette of a type having no slide shutter, but is more preferably applied to a tape cassette of a type having a slide shutter in which slack of the tape is a particular problem. The tape cassette 1 rotatably accommodates a pair of hubs 7 and 9 around which a tape 11 is wound inside a case consisting of a lower case 3 and an upper case 5, and the tape 11 is pulled out to the front of the case via a guide roller. It has been stretched. Through holes 13 and 15 through which the capstan of the recording / playback device penetrates are formed on the left and right of the front part of the case, and openings 17 and 19 through which the pinch rollers penetrate are formed at the front of these holes, respectively. It An opening 21 of the head house is formed in the center of the front part for the magnetic head to enter. As shown in FIG. 1, in order to prevent dust from entering, a slide shutter 23 having a U-shaped cross section is provided to cover substantially all of the exposed opening of the case, and the spring is always biased toward the illustrated position. ing. When the shutter is pushed in the direction of the arrow, the holes 25, 27, 29 and the like of the shutter are aligned with the openings of the case, respectively, and all the openings 13, 15, 17, 19, 21 and the tape hub drive hole are exposed.

Next, referring to FIGS. 3 to 4, the features of the present invention will be described. The bottom of the back of the case front wall 30 between the opening 21 of the head house and the opening 17 for the pinch roller. A storage groove 31 is formed in the (lower case side) and the top (upper case side-not shown). As shown in FIG. 4, a non-woven fabric or other cleaning member 35 is bonded to the magnetic tape side surface of a plate-shaped base member 33 having upper and lower edges that can fit in these grooves 31. This is fitted into the storage groove 31 of FIG.

Embodiment 2 Another example of the present invention will be described with reference to FIGS. 5 to 6. The case front wall 30 between the opening 21 of the head house and the opening 17 for the pinch roller is a central portion. Is cut out into a rectangular shape, and vertical slots 37 are formed on the left and right walls. On the other hand, a non-woven fabric or other cleaning member 35 is adhered to the magnetic tape side surface of the base member 33 having the left and right projecting edges 39 that can be fitted in the slots 37. The left and right ridges 39 are fitted into the left and right vertical slots 37 in FIG.

Third Embodiment FIG. 7 shows an example in which a cleaning member is provided on the magnetic head side. The overall construction of the illustrated tape cassette is as described in connection with FIGS. However, this example is different from the above example in that a cleaning member such as a non-woven fabric or a pad is attached to the support member 43 of the magnetic head 41 that goes in and out of the opening 21 of the head house via the base member 45.

[0010]

[Function and effect of the device]

 With the above-described configuration, the cleaning member 35 can always contact the magnetic tape for cleaning. During tape stop operation, the cleaning member does not exert a braking force on the tape as in the past, regardless of which of the left and right capstan is on the drive side, so the capstan stops after the tape drive shaft stops. The tape does not sag even in the case of all types of recording / playback equipment.

[Brief description of drawings]

FIG. 1 is a plan view of a tape cassette according to a first embodiment of the present invention.

FIG. 2 is a plan view showing the inside of the tape cassette according to the first embodiment of the present invention.

FIG. 3 is an enlarged plan view of an essential part of the tape cassette according to the first embodiment of the present invention.

FIG. 4 is a perspective view of the cleaning member according to the first embodiment of the present invention.

FIG. 5 is an enlarged plan view of an essential part of the tape cassette according to the second embodiment of the present invention.

FIG. 6 is a perspective view of a cleaning member according to a second embodiment of the present invention.

FIG. 7 is a plan view of a tape cassette according to a third embodiment of the present invention.

[Explanation of symbols]

 1: Tape cassette 3: Lower case 5: Upper case 7, 9: Hub 11: Tape 13, 15: Through hole 17, 19, 21: Opening 23: Slide shutter 25, 27, 29: Hole 30: Case front wall 31: Storage groove 33: Base member 35: Cleaning member 37: Vertical slot 39: Edge

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Haruo Shiba Inventor, 13-1 Nihonbashi, Chuo-ku, Tokyo TDK Corporation

Claims (5)

[Scope of utility model registration request] 1. A tape cassette characterized in that a hub around which a magnetic tape is wound is rotatably mounted inside a case, and a cleaning member such as a non-woven fabric or felt that comes into contact with the magnetic tape is provided on a front wall of the case. . 2. The tape cassette according to claim 1, wherein a slide shutter having a U-shaped cross section is provided on the front surface of the case. 3. The cleaning member is attached to the base member, the front wall of the case has a storage portion that fits with the base member, and the base member is fitted into the storage portion. The tape cassette according to claim 1. 4. The cleaning member is attached to a base member, a notch portion is provided on a front wall of the case, and the base member is fitted and fixed to the notch portion. Tape cassette. 5. A tape cassette in which a hub around which a magnetic tape is wound is rotatably mounted inside a case, and a front wall of the case is provided with an opening for allowing a magnetic head to come in contact with the magnetic tape. A combination of a tape cassette and a magnetic head, characterized in that a cleaning member such as a non-woven fabric or felt which is in contact with the magnetic tape adjacent to the head is provided integrally with the magnetic head.