JPH0630984U - Tape cassette - Google Patents

Abstract

(57) [Summary] [Objective] It is an object to provide a tape cassette provided with a tape cleaning member that can be easily replaced. A tape cassette case is provided with a hole in a wall near a tape running path, a plug is provided to close the hole, and a cleaning member such as a nonwoven fabric or felt is provided at a contact portion of the plug with the magnetic tape recording surface. .

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, since the cleaning member is incorporated in the tape cassette, the cleaning effect is deteriorated if it is used for a long time. Accordingly, it is an object of the present invention to provide a tape cassette with a replaceable cleaning member. Further, a mechanism for pressing the cleaning member against the tape guide pin or the guide roller easily causes troubles in the tape running path. That is, when the recording / playback device is switched to the stop, the tape drive shaft is usually 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, the tape slacks between the part held by the cleaning member on the take-up side and the capstan, and remains in the head house and other parts in front of the cassette. If this happens, the tape may be caught between U-shaped shutters, or the tape cassette that was once removed from the recording / playback machine may be inserted into the recording / playback machine again, and the magnetic tape may not enter between the capstan roller and the pinch roller. there were. However, since the cleaning member is incorporated in the tape cassette, the cleaning effect is deteriorated if it is used for a long time. Therefore, another object of the present invention is to solve the problem of slackening of the tape at the front of the cassette in a tape cassette having a cleaning mechanism.

[0004]

[Means for Solving the Problems]

 According to the present invention, in a tape cassette in which a hub around which a magnetic tape is wound is rotatably mounted inside a case, a hole is provided in a wall of the case near the tape running path, a plug for closing the hole is provided, and Provided is a tape cassette characterized in that a cleaning member such as a non-woven fabric or felt is provided at the contact portion with the recording surface of the magnetic tape.

[0005]

[Function of the device]

 According to the present invention, the cleaning member can be easily replaced by replacing the plug. Further, according to the present invention, the cleaning member does not press the tape against the guide or roller at the front of the case, so that the tape does not sag at the front. Particularly, in a tape cassette of the type in which a slide shutter having a U-shaped cross section is provided on the front surface of the case, the slackened tape on the front surface of the case directly contacts the shutter, so the cleaning member of the present invention is effective.

[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 the tape cassette of the present invention, and FIG. 2 is a plan view with an upper case and a shutter removed to show the inside thereof. The tape cassette 1 includes a lower case 3 and an upper case 5 in which a tape 11 wound around a pair of hubs 7 and 9 is rotatably housed, and the tape 11 is passed through a guide roller 31 to the front of the case. It is pulled out and stretched. Through holes 13 and 15 through which the capstan of the recording / reproducing device penetrates are formed on the left and right of the front part of the case, and openings 17 and 19 through which pinch rollers penetrate are formed in the front part of these holes, respectively. ing. At the center of the front part, an opening 21 is formed in the head house for the magnetic head to enter.

Next, the features of the tape cassette according to the embodiment of the present invention will be described with reference to FIGS. The guide pin 35 is fixed to the lower case 3 close to the side wall 4, and the tape 11 wound around the tape hub 7 is guided to the vicinity of the side wall 4 by the guide pin 35 and then drawn out to the front part of the tape cassette. ing. A through hole 33 is provided in the side wall 4 close to the pin 31. A plug 37 is inserted in this hole 33. The plug 37 is provided with a thread or fastening projection 39, and correspondingly the hole 33 is provided with a screw or fastening recess. A cleaning member 31 made of non-woven fabric, felt, or the like is attached to the surface of the plug 37 that contacts the tape 11. The cleaning mechanism of the present invention may be provided on both side walls of the case, or may be provided on the front portion. When the plug is provided in the front part, the plug can be fixed by, for example, forming a tapered taper having a cleaning member at the tip and inserting the plug into the hole in the front wall and covering the plug end with a shutter.

Embodiment 2 The present invention can be applied to a tape cassette of the type shown in FIGS. FIG. 4 is a plan view of a tape cassette having a slide shutter, and FIG. 5 is a plan view with the upper case and the shutter removed to show the inside thereof. The present invention can be suitably applied to a tape cassette of this type in which the slack of the tape is a 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, the tape 11 wound around the tape hubs 7 and 8 is guided to the vicinity of the side wall 4 and then pulled out to the front part of the tape cassette. A through hole is provided in the side wall 4 and a plug 37 is inserted therein. The plug 37 is provided with a thread or a fastening projection, and the through hole is correspondingly provided with a screw or a fastening recess. A cleaning member 31 made of non-woven fabric or felt is attached to the surface of the plug 37 that contacts the tape 11.

[0010]

[Effect of device]

 In use, the cleaning member 31 is always in contact with the magnetic tape for cleaning. Further, the cleaning member 31 can be easily removed and replaced with a new one. Also, during tape stop operation, even if the tape slackens due to the drive of the capstan after the tape drive shaft stops, the cleaning member does not exert a braking force on the tape in front of the tape cassette as in the past. Therefore, the slack of the tape occurs inside the cassette, and the conventional problem is solved.

[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 with the plug removed.

FIG. 3 is a plan view showing the inside of the tape cassette according to the first embodiment of the present invention with a plug attached.

FIG. 4 is a plan view of the tape cassette according to the first embodiment of the present invention.

FIG. 5 is a plan view showing the inside of a tape cassette according to a second embodiment of the present invention and a plug attached.

[Explanation of symbols]

 1 Tape Cassette 3 Lower Case 5 Upper Case 7, 8 Hub 11 Tape 13, 15 Through Holes 17, 19, 21 Open 23 Slide Shutter 31 Cleaning Member 33 Hole 35 Guide Pin 37 Plug

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

Claims (4)

[Scope of utility model registration request] 1. A tape cassette in which a hub around which a magnetic tape is wound is rotatably mounted inside a case, a hole is provided in a wall of the case near a tape running path, and a plug for closing the hole is provided. A tape cassette, wherein a cleaning member such as a non-woven fabric or felt is provided at the contact portion with the magnetic tape recording surface. 2. The tape cassette according to claim 1, wherein the case comprises a shutter having a U-shaped cross section for covering the opening when not in use. 3. The tape cassette according to claim 1, wherein the plug is made of an elastic material. 4. The tape cassette according to claim 1, wherein the plug is covered with a shutter when not in use.