JPH0638089U - Tape cassette - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a tape cleaning member that does not cause slack in the tape at the front of a tape cassette. A hub which is wound with a magnetic tape is rotatably mounted inside a case, one end of which is attached to the case and the other end of which is an abutment portion for the hub or the tape wound around the hub. An arm member is provided, and a non-woven fabric is provided on the contact portion.
A cleaning member such as felt was provided.

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. If this happens, the tape may be pinched by the U-shaped shutter, or the magnetic tape may not get between the capstan roller and the pinch roller when the tape cassette that was once removed from the recorder / player is installed again in the recorder / player. It was 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 around which a magnetic tape is wound is rotatably mounted inside a case, and one end is attached to the case and the other end is a swinging part which is an abutting portion to the hub or the tape wound on the hub. The tape cassette is characterized in that the arm member is provided and a cleaning member such as a nonwoven fabric and felt is provided at the abutting portion. Particularly, in a tape cassette of a type in which a slide shutter having a U-shaped cross section is provided on the front surface of the case, the slack tape on the front surface of the case comes into direct contact with the shutter, so the solution means of the present invention is particularly effective. In this case, the arm member is made of an elastic member such as phosphor bronze which is itself elastic, or an elastic member such as plastic to fix the mounting end, or the mounting end of the arm member is fixed as described later in Examples. It is pivotally attached, and the arm member is biased by another elastic member such as a torsion spring and pressed against the hub or the tape wound around the hub. Although only one cleaning member is required, one cleaning member may be associated with each hub. In that case, two arm members are provided, and one end of each of the two arm members is placed at the same location. And rotatably fix it to the case by pressing the two arm members with one elastic member so that the contact parts of the two arm members become two hubs or a tape wound around the hub. Press each one. Further, if a tape winding disorder prevention collar is provided on the hub contact surface of the arm member, the winding shape can be maintained at the same time as the cleaning, and the running property can be improved.

[0005]

[Function of the device]

 According to the present invention, since the braking force does not act on the tape from the cleaning member on the front surface of the tape cassette when the tape is stopped, the slack of the tape occurs in the case, and the conventional problem is solved. It

[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, the features of the tape cassette according to the first embodiment of the present invention will be described with reference to FIG. An arm member 31 is pivotally attached to a shaft 33 fixed to the case 3 at one end thereof in a space between the tape wound around the tape hub 9 and the tape running path. The arm member 31 has at its other end a contact portion 32 for contacting the hub 9 or the tape 11 wound around the hub 9, and a cleaning member 35 such as a nonwoven fabric or felt is attached to at least the hub-side surface thereof. . If a non-woven fabric is also attached to the back surface of the abutting part, the cleaning effect when the tape becomes loose and the excessive entanglement prevention when the tape becomes loose become possible. A torsion spring (elastic member) 37 is attached around the pivot portion of the arm member 31, one end of which is hooked on a pin fixed to the lower case 3, and the other end is on the right side of the arm member 31. It's hooked on the surface. Therefore, the arm member 31 is always biased around the counterclockwise, swings according to the diameter of the winding portion of the tape, and constantly contacts the tape for cleaning. If desired, the tape contact portions 32 of the arm member 31 may be provided on both sides with the collars 41 for preventing the tape winding disorder as shown in FIG. The same applies to the example of FIG.

In use, the cleaning member 31 is always in contact with the magnetic tape for cleaning. 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 conventional case. The slack of the tape will occur inside the cassette, and the conventional problems will be solved.

Second Embodiment FIG. 3 shows a tape cassette 1 according to a second embodiment. An arm member 31 is pivotally attached at one end thereof to a shaft 33 fixed to the case 3 in a space between the tape wound around the tape hub 7 and the case back wall. The arm member 31 has an abutting portion 32 at the other end for abutting the hub 9 or the tape 11 wound around the hub 9, and a cleaning member 35 such as a non-woven fabric or felt is attached to the hub-side surface thereof. A torsion spring (elastic member) 37 is attached around the pivot portion of the arm member 31, one end of which is hooked on a pin fixed to the lower case 3, and the other end of which is on the upper surface of the arm member 31. I'm trying. Therefore, the arm member 31 is always biased counterclockwise, swings according to the diameter of the winding portion of the tape, and constantly contacts the tape to perform cleaning. The effects of this example are similar to those of the first embodiment.

Third Embodiment FIG. 4 shows a tape cassette 1 according to a third embodiment. In this example, two cleaning members are used to clean each tape winding part. Two arm members 31, 31 are pivotally attached to a common shaft 33 fixed to the case 3 at one end thereof in the space between the tape wound around the tape hubs 7 and 9 and the case back wall. . The arm members 31, 31 have abutting portions 32, 32 at the other end for abutting the hubs 7, 9 or the tape 11 wound around the hubs 7, 9, and the hub-side surface thereof is made of a cleaning material such as nonwoven fabric or felt. The members 35, 35 are attached. A single torsion spring (elastic member) 37 is attached around the pivot portion of the arm members 31, 31, and both ends thereof are hooked on the upper side surfaces of the arm members 31, 31, respectively. Therefore, the left arm member 31 is always biased counterclockwise, and the right arm member 31 is always biased clockwise, so that each arm member 31 swings in accordance with the diameter of the winding portion of the tape 11 and constantly contacts the tape. And perform cleaning. The operation and effect of this example are similar to those of the first embodiment, and the cleaning effect is large, and there is an advantage that only one torsion spring is required. FIG. 5 shows a modified example of the torsion spring 37 in FIG. 4, which is provided in the lower case 3 in the vicinity of the pivot parts of the arm members 31 and 31, and the coil portion of the torsion spring 37 is fixed to the pin 39. However, both ends of the spring are hooked on the upper side surfaces of the arm members 31, 31, respectively.

Embodiment 4 FIG. 6 illustrates a fourth embodiment of the tape cassette of the present invention. Arm members 31, 31 are fixed at one end to one ends of torsion springs 33, 33 in a space between the tape wound around the tape hubs 7, 9 and the side wall of the case. The torsion springs 33, 33 have their coil portions supported by the pins 43, 43 and the other end fixed to the pin 45. For this reason, the spring 33 always biases the arm members 31, 31 toward the tape. The arm members 31, 31 have abutting portions 32, 32 at the other end for abutting against the tape 11 which is fed from the hub or wound on the hub. As shown in FIG. 7, the hub-side surface is made of non-woven fabric, felt or the like. The cleaning member 35 is attached. On both sides of the tape contact portion 32 of the arm member 31, there are provided collars 41 for preventing disorder of tape winding as shown in FIG. The operation and effect of this embodiment are similar. In addition, in this example, the slack of the tape is forcibly taken inside the cassette. However, the spring strength must be sufficiently weak so as not to over tension the tape.

[0012]

[Effect of device]

 As described above, the swinging arm member having one end attached to the case and the other end abutting against the tape is provided, and the abutting portion is provided with the cleaning member such as nonwoven fabric and felt. Sometimes, the braking force does not act on the tape from the cleaning member on the front surface of the tape cassette, so that the slack of the tape does not occur on the front surface of the case but occurs inside the case, thus eliminating the conventional problem.

[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 a plan view of a tape cassette according to a second embodiment of the present invention.

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

FIG. 5 is a plan view showing a modified spring according to a third embodiment of the present invention.

FIG. 6 is a plan view of a tape cassette according to a fourth embodiment of the present invention.

FIG. 7 is a diagram showing an example of an abutting portion of an arm member.

[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 31: Arm member 32: Tape contact portion 33: Elastic Member 35: Cleaning member 39: Pin 41: Collar 43, 45: Pin

 ─────────────────────────────────────────────────── ─── 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 rocking hub in which a magnetic tape is wound is rotatably mounted inside a case, and one end is attached to the case and the other end is a contact portion for the hub or a tape wound on the hub. A tape cassette characterized in that a free arm member is provided, and a cleaning member such as a nonwoven fabric or felt is provided at the contact portion. 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 tape cassette according to claim 1, wherein the arm member is pressed against the hub or the tape wound around the hub by an elastic member. 4. Two arm members are provided, one ends of the two arm members are pivotally attached to the case at the same location, and the two arm members are pressed by one elastic member to form two arm members. The tape cassette according to claim 1 or 2, wherein the abutting portions of the arm members are pressed against the two hubs or the tape wound around the hubs. 5. The tape cassette according to claim 1, wherein a tape winding disorder prevention collar is provided on the hub contact surface of the arm member.