JPS6428527U - - Google Patents

Description

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view of a cassette tape recorder equipped with an automatic stop device for a tape running device of the present invention in a stopped state, and FIG. 2 is a bottom view of the same. Figure 3 is a view taken along the line in Figure 1, Figure 4 is a view taken along the same line,
Figure 5 is a view along the same line, Figure 6 is a view along the same line,
Figure 7 is a partially cutaway enlarged view of the switch, Figure 8 is a sectional view of the reel shaft, Figure 9 is an exploded perspective view, Figure 10 is a perspective view of the head mounting plate, and Figure 11 is the head mounting plate. FIG. 12 is a cross-sectional view of the head mounting structure, FIG. 13 is a cross-sectional view of the pinch roller portion, and FIG. 14 is a cross-sectional view showing the mounting structure of the head mounting plate to the chassis during installation. Fig. 15 is a perspective view of the plate spring and engagement hole portion in Fig. 14, Fig. 16 is a sectional view of the head mounting plate in a completed state showing the mounting structure of the head mounting plate to the chassis, and Fig. 17 is the plate in Fig. 16. Fig. 18 is a perspective view of the shaped spring and the engagement hole portion, Fig. 18 is a partially cutaway perspective view of the head mounting plate attached to the chassis, Fig. 19
The figure is a partially cutaway plan view showing the magnetic head and pinch roller in contact with the tape of the tape cassette, Figure 20 is a sectional view showing the attachment structure of the hook to the chassis, Figure 21 is a perspective view of the hook, and Figure 22 23 is a perspective view showing the relationship between the rotating body, the stop operation member, and the locking member, FIG. 23 is a perspective view of the locking member, and FIG.
The figure is a sectional view taken along the line AA in Fig. 23, Fig. 25 is a sectional view taken along the line BB in the same figure, and Fig. 26 is a sectional view taken along the line C-C in the same figure.
27 is a perspective view showing the relationship between the stop operation member and the interlocking member, FIG. 28 is an exploded perspective view showing the pivoting mechanism between the cassette holder and the interlocking member, and FIG. 29 is the same assembly. 30 is a partially omitted perspective view of the cassette holder portion, FIG. 31 is a side view of the tape cassette attached to the cassette holder in the reset position, and FIG. 32 is the D-D of FIG. 31. 33 is a side view of the regenerated state, FIG. 34 is a plan view of the same, FIG. 35 is a bottom view of the same, and FIG. 36 is a partially cutaway bottom view of the automatic stop function. Figure 37 is a partially cutaway bottom view of the tape cassette with the tape cassette ejected;
The figure is an enlarged view of the main part of FIG. 37. 2... Capstan shaft, 3... Reel shaft, 4... Motor, 5... Switch, 8b... Tape, 12... First friction mechanism, 14... Rotational force transmission body, 14a
... Shaft (rotating shaft), 15... Rotating body, 18... Annular cam, 18a... Cam surface (peripheral surface), 19... Locking part, 20
...Cam follower, 20a...Abutting part, 20b...Engaged part, 20d...Fitting part, 21...Second friction mechanism, 22...Head mounting plate (moving body), 22c
...Engaging portion, 47...Stopping member (moving body).

Claims (1)

[Claims for Utility Model Registration] 1. A device comprising a capstan shaft, a reel shaft, a motor for rotationally driving the capstan shaft and the reel shaft, and a switch for cutting off power to the motor so that the tape can be wound up to the end. In an automatic stop device for a tape running device, the switch automatically stops tape running by cutting off electricity to the motor when the rotation of the reel shaft stops due to the rotation of the reel shaft being stopped by a spring force. a rotating body which is elastically held in position; and the rotating body is rotatably supported by the rotating body and rotates in response to the rotational force of the capstan shaft, and when the rotating body is in the normal position, the rotational force of the capstan shaft is applied to the first rotational body. a rotational force transmitting body that transmits the rotational force to the reel shaft via a friction mechanism; an annular cam that is located on the rotational force transmitting body around the rotational axis and eccentrically provided with respect to the rotational axis; a locking portion provided on the force transmitting body at a distance from the circumferential surface of the annular cam; and a cam follower biased in one direction by the rotational force of the reel shaft being transmitted via a second friction mechanism. and a movable body having an engaging portion that is different in position between an operating mode and a stop, and the cam follower has a cam sliding contact portion that slides on the peripheral surface of the annular cam, and a movable body that has an engaging portion that is in sliding contact with the circumferential surface of the annular cam, and a moving body that has an engaging portion that is in a different position depending on whether it is in an operation mode or when it is stopped. and an engaged portion that removably engages with the engaging portion of the movable body, and when the reel shaft is rotating, the abutting portion contacts the movable body. The cam sliding contact portion of the cam follower continues to contact the circumferential surface of the annular cam without contacting the locking portion, and the rotation of the reel shaft is stopped, and the cam sliding contact portion of the cam follower continues to contact the circumferential surface of the annular cam. When the rotating body is moved away from the circumferential surface of the motor, the contact portion contacts the locking portion, causing the rotating body to move and operate the switch to cut off the power supply to the motor, and at the same time, the rotational force is transmitted. When the body is removed from the rotation transmission path from the capstan shaft to the reel shaft, and furthermore, when the movable body moves from the operating mode position to the stop position after the motor is stopped, the engaging portion of the movable body By engaging with the engaged portion of the cam follower, the cam follower can be moved to a position where the cam sliding portion thereof slides on the circumferential surface of the annular cam and the abutting portion does not contact the locking portion. An automatic stop device for a tape running device, characterized in that it is configured as follows. 2. The automatic stop device for a tape running device according to claim 1, wherein the moving body is a head mounting plate. 3. The automatic stop device for a tape running device according to claim 1, wherein the movable body is a stop operation member. 4. The second friction mechanism is configured by elastically fitting and pressing the inner surface of the C-shaped fitting recess of the cam follower onto the outer periphery of the reel shaft. An automatic stop device for a tape running device as described in 2. 5. The automatic stop device for a tape running device according to claim 1, wherein the engaged portion of the cam follower is elastically deformable.