JPS6236456U - - Google Patents

Description

[Brief explanation of the drawing]

The drawings show an embodiment of the pinch roller switching mechanism for a cassette tape recorder according to the present invention.
The figure shows the overall layout, as seen from the loading surface of the cassette tape, and the details of the chassis and other parts are omitted for the sake of simplification. Figure 2 is a plan view showing only the drive source relationship, Figure 3 is a plan view showing the relationship between the reel stand and idler, and Figure 4 is the relationship between the drive gear, control cam gear, direction arm, etc. FIG. Note that FIGS. 1 to 4 all show the forward stop state. 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. Fig. 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, Fig. 9 is a plan view showing the relationship between the direction slider and the pinch roller, FIG. 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 FIG.
15 to 15 are plan views showing the relationship between the control cam gear and the direction arm, with FIG. 12 showing the forward stop position and FIG. 13 showing 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 indicates the forward cue position, D the reverse stop position, E the reverse play position, and F the reverse cue position. 1st
6A to C are plan views showing the relationship between the control cam gear and the trigger lever, where A shows the stop position for both forward and reverse, B shows the play position for both forward and reverse, and C shows the forward and reverse positions. The positional relationship between reverse queue and review is shown. 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. 1a, 2a: Capstan, 3: Motor, 5
: 1st solenoid, 6: 2nd solenoid, 7
: trigger lever, 8: switching lever, 9: drive gear, 14: idler component, 15: slide base, 16: drive gear, 17: control cam gear, 1
8, 19: Cam part, 20: Direction arm, 21, 22: Engagement pin, 24: Switching cam gear, 25: Direction slider, 26: Magnetic head, 28: Head reversing mechanism, 30, 31: Pinch Roller mechanism, 32, 33: Pinch roller, 301, 311: Pinch arm, 302, 31
2: Pin, 34, 35: Pinch roller control groove,
340, 350: Cut groove.

Claims (1)

[Scope of utility model registration request] It has a control cam gear that rotates in mesh with a drive gear such as a flywheel gear by the operation action, and an engaging part that engages with a cam part formed on the cam gear, and the control cam gear rotates by the rotation of the cam gear. A direction arm is pivotally supported so that one end thereof can be moved between four positions, and the one end of the direction arm is engaged to allow the direction arm to swing. a direction slider that is configured to slide to reverse the head; and a pin formed on the direction slider and provided on the pinch arm, which engages to press the pinch roller against the capstan. 1. A pinch roller switching mechanism in a cassette tape recorder, comprising a pinch roller control groove for controlling whether the