JPH035231U - - Google Patents

Description

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention,
Figure 1 is a plan view of an auto-reverse tape recorder equipped with the rotation transmission path switching mechanism of the present invention;
The figure is an exploded perspective view of the head mounting plate and switching gear support member in Figure 1, Figure 3 is an explanatory diagram showing the procedure for attaching the switching gear support member to the head mounting plate, and Figures 4 and 5 are conventional FIG. 3 is a plan view of the rotation transmission path switching mechanism of FIG. 21, 22... Reel receiver, 27... Motor, 29
...Switching gear, 30...Right transmission gear, 31...Left transmission gear, 32...Head mounting plate (sliding plate), 3
3...Switching gear support member, 33a...Main body, 33b...
Short axis boss portion, 33c, 33d...elastic arm, 33
e, 33f... engaging body, 33g... retaining piece, 35a,
35b...Slit, 36...Switching plate, 37...Engagement hole (engaging portion), _L1 ...Anteroposterior width of engagement hole, _L2 ...Anteroposterior width of main body.

Claims (1)

[Scope of utility model registration request] A pair of left and right transmission gears that mesh with each other and are driven by a motor are placed near the left and right reel gears, respectively, and a switching gear support member is mounted on a sliding plate to which a magnetic head is attached so that it can be moved left and right within a certain range. The switching gear supporting member is provided with a switching gear that meshes with the reel gear and the transmission gear on either side at the same time, and a switching plate that makes the left and right pinch rollers approach and separate from the corresponding capstan is connected to the sliding plate. The switching plate is arranged so as to be stacked and movable in the left-right direction, and the switching plate is provided with an engaging portion that engages with the switching gear support member, and the switching gear support member is interlocked with the movement of the switching plate in the left-right direction. , the switching gear is configured to be separated from the reel gear and transmission gear on one side and meshed with the reel gear and transmission gear on the other side, and the switching gear support member is made of synthetic resin and is attached to the center of the plate-shaped main body. A short shaft boss portion that rotatably supports the shaft of the switching gear is integrally provided on the upper surface, and elastic arms are integrally provided on the left and right sides of the outer peripheral surface of this boss portion to project rearward, and these An engaging body is integrally provided on the protruding ends of both elastic arms, and a retaining piece is integrally provided on the front side of the outer peripheral surface of the boss portion and faces the main body with a gap therebetween, so that the sliding The plate is provided with an engagement hole whose longitudinal width is smaller than that of the main body by a predetermined dimension, and a slit in which the engagement bodies of both the elastic arms are movably engaged, and the main body is engaged with the engagement hole from the front end side thereof. By engaging with the hole and bringing the boss part into contact with the front edge of the engagement hole, the entire main body is positioned below the sliding plate through the engagement hole, and then the main body is By sliding rearward, the engaging bodies of both elastic arms engage with the slit, and the switching gear support member is held in a state in which the sliding plate is sandwiched between the front end side of the boss portion of the main body and the retaining piece. 1. A rotation transmission path switching mechanism for an auto-reverse tape recorder, characterized in that the rotation transmission path switching mechanism is configured to be attached to the sliding plate.