JPS6030841Y2 - Pinch roller operating mechanism - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pinch roller operating mechanism, and more specifically, to a pinch roller operating mechanism in which a spring for returning a play lever or the like also serves as a spring for the pinch roller.

In the conventional pinch roller operating mechanism, in order to press the pinch roller against the capstan, a spring is attached to the pinch roller support member that biases the pinch roller in the direction of pressing the pinch roller against the capstan around the spindle. When playing or recording, a return spring is attached to the play lever, etc., which pulls the pinch roller away from the capstan against the biasing force of the spring, and each performs a different function.

This idea attempts to use the return spring of the play lever, etc., to press the pinch roller against the capstan, and its features include a pinch roller support member pivotally connected to a fixed chassis, and an end of the support member. or a swinging rod which is suspended from the support member and has one end engaged with the end of a spring for pressing the pinch roller against the capstan, and which is pivotally connected to the play lever or a member interlocked with the play lever; a self-returning spring means, and a stopper provided on a fixed chassis that engages with the other end of the swinging rod at least when the swinging rod returns; Applying a return force to the play lever or a member interlocking with the play lever via the swinging rod by suspending the other end, near the center of the pivot point, and the fixed chassis;
Furthermore, the present invention provides a pinch roller operating mechanism that applies rotational force to the pinch roller in the capstan direction via the swinging rod when the play lever is operated.

An embodiment of this invention shown in the drawings will be described in detail below.

As shown in FIGS. 1 and 2, the pinch roller operating mechanism of this invention has a pin 5 attached to one end of a pinch roller support member 4 that supports a pinch roller 3 which is pivotally connected to a fixed chassis 1 through a shaft 2. The pin 5 is fixed to the fixed chassis 1 by operating a play button (not shown), and the slide guide pins 6a and 6b are pivoted with a shaft 8 to a play lever 7 configured to regulate the slide position and amount. A spring 12 is engaged with a notch 10 formed at one end of the swinging rod 9, and a spring 12 is installed between a substantially central portion between the pivot point of the swinging rod 9 and the other end and a locking pawl 11 of the chassis. As shown in FIG. 1, when the play lever 7 is stopped, the spring returns the play lever 7 to the figure position, and the slide guide pin 6 is inserted into one end of the guide holes 13a and 13b provided in the play lever 7.
When a and 6b are positioned, the chassis 1 is placed at the other end of the swinging rod 9.
When the stopper 14 attached to the capstan CP opposes the swinging rod and the swinging rod becomes horizontal, the pinch roller support member 4 rotates the pinch roller 3 counterclockwise about the shaft 2 to the capstan CP.
It is configured to cause the most separation.

In the figure, 15 is a cassette positioning pin, and 16 is a cassette.

Since this pinch roller operating mechanism is configured as described above, when playing, as shown in FIG. Since the pivot point of the swinging rod 9 also moves as the swinging rod 9 moves, the spring 12
When a counterclockwise rotational force is applied to the pinch roller support member 4, the rotational force in a clockwise direction about the shaft 2 is transmitted from one end of the swinging rod via the pin 5, and the slide amount of the play lever 7 is increased. The pinch roller 3 is at the maximum point near the capstan C.
Although not shown in the drawings, the tape sandwiched therebetween is transferred at a constant speed as is well known in the art.

Next, when the stop button or rewind button is operated, the play lever 7 is unlocked at the position shown in FIG. 2 by a well-known mechanism, and the contracting force of the spring 12, which is fully tensioned during the operation shown in FIG. 2, is released. In cooperation with the stopper 14, the signal is transmitted to the play lever 7 via the swing rod 9, and the play lever 7 is restored to the stopped state shown in FIG.

During the recovery process of the play lever 7, the pivot point between the swinging rod 9 and the lever moves in the direction shown by the arrow in FIG. The pinch roller 3 rotates counterclockwise around the shaft 2, and the pinch roller 3 moves away from the capstan CP in a straight line connecting the capstan CP and the center of the pinch roller mounting shaft as shown in FIG. 2, and reaches the stopped state shown in FIG. 1. Return to

In addition, in the case described above, except for the spring attached to the pinch roller support member, one spring is biased to serve as both the pressing force against the capstan of the pinch roller and the return force for returning the play lever etc. In addition, FIG. 3 shows another embodiment of the present invention with the same structure as the above-mentioned structure, and the same reference numerals are used to indicate the same structure. Similarly, if one end of the swinging rod 9 is engaged with the end of the spring 17 attached to the pinch roller support member 4, when the pinch roller 3 is brought into pressure contact with the capstan CP, the spring 17 and the spring By working together with 12, it is possible to achieve efficient pressure contact.

Moreover, although the case where the swinging rod is pivotally connected to the play lever has been described above, it is easy to understand that the swinging rod may be pivotally connected to a member that is displaced (interlocked) with the play lever. Probably.

As described above, this invention includes a pinch roller support member pivotally connected to a fixed chassis, and one end attached to the end of the support member or the end of a spring for pressing the pinch roller suspended from the support member to the capstan. a swinging rod pivotally connected to the play lever or a member interlocking with the play lever; a spring means for self-resetting the swinging rod; and at least the other end of the swinging rod when the swinging rod returns. a stopper provided on the fixed chassis that engages with the play lever; the self-returning spring means applies a return force to the play lever or a member interlocking with the play lever via the swinging rod; The oscillating rod is connected between the other end of the oscillating rod, near the center of the pivot point, and the fixed chassis so as to apply a rotational force to the pinch roller in the capstan direction via the oscillating rod when the oscillating rod is operated. Since a spring means for self-return of the moving rod is provided, except for the spring attached to the pinch roller support member, one spring is used to generate the pressing force against the capstan of the pinch roller and the return force for returning the play lever etc. Since it can also be biased, one spring is not required and the mechanism can be operated without difficulty.Also, when using the spring attached to the pinch roller support member, the spring that returns the play lever etc. can also be used effectively.

[BRIEF DESCRIPTION OF THE DRAWINGS] The figures show one embodiment of this invention, and FIG. 1 is a plan view of the pinch roller operating mechanism in a stopped state, and FIG. 2 is a plan view of the pinch roller operating mechanism in a playing state. 3 are plan views showing other embodiments of the present invention. Explanation of symbols, 1... Chassis, 2, 8...
...Shaft, 3...Zench roller, 4...Pinch roller support member, 5...Zen, 6a, 6b.
...Slide guide bin, 7...Play lever, 9...M moving rod, 10...Concave notch, 11...Latching claw , 12.17... Spring, 13a, 13b... Guide hole, CP
... Capstan, 14 ... Stopper, 15 ... Cassette positioning pin, 16.
·····cassette.

Claims (1)

[Scope of utility model registration request] A pinch roller support member pivotally connected to a fixed chassis, and a play lever or A swinging rod pivotally connected to a member interlocking with a play lever, a spring means for self-resetting the swinging rod, and a fixed chassis that engages with the other end of the swinging rod at least when the swinging rod returns. the self-returning spring means applies a return force to the play lever or a member interlocked with the play lever via the swing rod, and prevents the swinging when the play lever is operated. A pinch roller operating mechanism suspended between the other end of the swinging rod, near the center of the pivot point, and a fixed chassis so as to apply rotational force to the pinch roller in the capstan direction via the rod.