JPS62101131U - - Google Patents

Description

[Brief explanation of the drawing]

The drawings show an embodiment of the drive gear switching mechanism for a cassette tape recorder according to the present invention, and FIG. The details of the chassis and other parts are omitted to simplify the drawing. Fig. 2 is a plan view showing only the relationship between the drive sources, Fig. 3 is a plan view showing the relationship between the reel stand and the idler, and Fig. 4 is a plan view showing the relationship between the reel stand and the idler.
The figure is a plan view showing the relationship between a drive gear, a control cam gear, a direction arm, and the like. In addition,
1 to 4 all show forward stop conditions. 5A and 5B are perspective views showing the control cam gear, where A is a perspective view as seen from the top side, and FIG. 5B is a perspective view as seen from the bottom side. Figure 6 is a perspective view of the direction arm.
Fig. 7 is a plan view showing the engaged state of the direction arm and the direction slider, Fig. 8 is a rear view showing the head reversing mechanism, and Fig. 9 shows the relationship between the direction slider and the pinch roller. 10 is a rear perspective view of the idler component, FIG. 11 is a plan view showing the fast forward and rewind switching mechanism, and FIGS. 12 to 15 are views of the control cam gear and direction arm. FIG. 12 is a plan view showing the relationship, and FIG. 12 shows the forward stop position.
FIG. 13 shows the reverse stop position. Fig. 14 is a plan view showing the reversal area of the head from forward to reverse, and Figs. 15 A to F are plan views showing the engagement positional relationship between the control cam gear and the engagement portion (pin) of the direction arm. where A is the forward stop position, B is the forward play position, C is the forward cue position, D is the reverse stop position, E is the reverse play position, and F is the reverse cue position. There is. FIGS. 16A to 16C are plan views showing the relationship between the control cam gear and the trigger lever;
A indicates the positional relationship of stop in both forward and reverse, B indicates the positional relationship of play in both forward and reverse, and C indicates the positional relationship of queue and review in forward and reverse, respectively. 17A to 17D are plan views showing the positional relationship between the idler component and the direction arm, A shows the forward stop and play positional relationship, B shows the reverse stop and play positional relationship, and C
indicates the positional relationship between forward queues and reviews, and D indicates the positional relationship between reverse queues and reviews. FIG. 18 is an operation timing chart of the first solenoid or the second solenoid accompanying each operation. 3: Motor, 5: First solenoid, 6: Second solenoid as a switching solenoid, 8
: Switching lever, 9: Switching drive gear, 14: Idler component, 15: Slide base, 16: Drive gear, 17: Control cam gear, 24: Switching cam gear, 39: Slider, 42: Guide groove, 8
4: Torsion spring as an elastic means, 91: Holding arm,
93: Engagement pin, 241: Pressing cam.

Claims (1)

[Scope of Claim for Utility Model Registration] A switching mechanism for switching a switching drive gear to fast forward or rewind mode, which rotates in mesh with a drive gear such as a flywheel gear by an operating action, and also rotates due to the rotation thereof. The switching cam gear has a cam portion that moves the slider, which is always biased in the backward direction, forward against the biasing force, and an engaging portion that engages with the cam portion formed on the switching cam gear. A switching lever that is swung by a switching solenoid engages with an engagement pin of a holding arm that swings and holds the switching drive gear, and the holding arm is moved to either fast forward or rewind. A bifurcated guide groove is formed on the slider to allow the slider to swing to the above mode, and a bifurcated guide groove is provided on the switching lever to elastically control the engagement of the engagement pin into the guide groove. A drive gear switching mechanism in a tape recorder, characterized in that it is equipped with a triggering means.