JPH0441476Y2 - - Google Patents

Description

[Detailed description of the invention] "Field of industrial application" In this invention, when a tape cassette is inserted into the cassette holder, the holder automatically moves from the reset position to the set position to perform the playback operation.
This invention relates to a pivot structure for an interlocking member in a cassette type tape recorder in which when a cassette holder is moved from a set position to a reset position, it automatically stops and the tape cassette is pushed back in the ejecting direction.

``Prior Art'' The overall mechanical structure of this type of cassette tape recorder will be explained below with reference to FIGS. 3 to 8.

That is, FIG. 3 is a plan view showing the mechanical part of the cassette tape recorder, FIG. 4 is a left side view of the same, and FIG. 5 is a right side view of the same.
2 is a cassette holder, 3 is a head support member, 4
5 is a locking member, 5 is an interlocking member, and 6 is an operating member.

A reel shaft 7, a capstan shaft 8, and a motor 9 for rotationally driving these are mounted on the upper surface side of the fixed substrate 1.

The cassette holder 2 has a flat plate shape and is arranged on the upper surface side of the fixed substrate 1, with one end pivoted to the proximal edge of the fixed substrate 1 as shown in FIGS. 6a and 6b.
The set position (lowering position) and the fixed board 1 in close contact with
It is rotatable between the reset position (raised position) and the remote position. The left and right ends and the front end of this cassette holder 2 are raised upward to form left and right side walls 10, 11 and a blocking wall 12, respectively, and the tape cassette 13 is placed on the left and right side walls from the hand side with the tape surface facing right. It is designed so that it can be inserted horizontally between 10 and 11. The cassette holder 2 also has an opening 14 in the center, and cutouts 15 and 16 extending from the bottom plate to the side wall 11 on the right side.
The reel shaft 7 is inserted through the opening 14, and the capstan shaft 8 is inserted through the front notch 15 into the tape cassette 1 in the cassette holder 2.
I am trying to have it inserted in 3. Then, by rotating the cassette holder 2 from the set position to the reset position, the tape cassette 13 is moved to the reel shaft 7.
and is detached from the capstan shaft 8.

The head support member 3 has a flat plate shape, and is attached to the back side of the fixed base plate 1 so as to be slidable in the left and right directions, as shown in FIG. 7, and is always biased leftward by a tension spring 17. This head support member 3 has a magnetic head 18 mounted on its upper surface, and the magnetic head 18 is positioned on the upper surface side of the fixed substrate 1 to the right of the notch 16 on the hand side of the cassette holder 2.

Further, a magnetic head 18 is mounted on the upper surface of the fixed substrate 1.
A pinch arm 19 is rotatably supported via a support shaft 20 at a forward position. This pinch arm 19 has a pinch roller 21 attached to its rotating end, and the pinch roller 21 is positioned to the right of the notch 15 at the front, and is rotated from the right side by a deployment spring 22 wound around a support shaft 20. The pinch roller 21 elastically contacts a part of the head support member 3 and moves the pinch roller 21 to the capstan shaft 8 following the leftward movement of the head support member 3.
Press it against the

The lower end of the locking member 4 is attached to the fixed base plate 1 at a position below the rotating end of the cassette holder 2, as shown in FIG. In addition, as shown in Figure b, a short locking piece 23 and a tall cassette push-out piece 24 are arranged side by side on the left and right, and a spring hanging piece 25 extending leftward is provided at the upper end of the push-out piece 24. There is. When this locking member 4 rotates in the cassette removal direction, the locking piece 23 moves to the lower surface side of the cassette holder 2 to prohibit rotation of the cassette holder 2 in the setting direction, and the push-out piece 24 The tape cassette 13 inside the cassette holder 2 is pushed back in the ejecting direction. Conversely, when the push-out piece 24 is pushed by the tape cassette 13 inserted into the holder 2, the locking piece 23 comes off from the lower surface of the cassette holder 2. Note that there is a push-out piece 2 at the rotating end of the cassette holder 2.
A recess 2b is formed opposite to 4 (see FIG. 3).

The interlocking member 5 is rotatably mounted on the left side wall 10 of the cassette holder 2 as shown in FIG. It is designed to rotate. Further, this interlocking member 5 is provided with a bifurcated leg portion 26 extending downward from the center of rotation, and the pressing protrusion 6a of the operating member 6 is appropriately engaged between the front and rear leg portions 26a and 26b. It's becoming like that.

Ends 27a and 27b of a deployment spring 27 as a rotational drive source shown in FIGS. 6a and 6b are locked to the spring hook 25 of the locking member 4 and one end of the interlocking member 5, respectively.

As shown in FIG. 7, the operating member 6 is attached to the back side of the fixed base plate 1 so as to be slidable in the front and rear directions.

This operating member 6 has its left side edge raised upward to form a pressing operating member 28, and the pressing protrusion 6a is positioned in front of the operating portion 28. Further, an inclined edge 29 is provided on the right side edge of the operating member 6, and the inclined edge 29 is inclined toward the front and leftward.
9, a roller 30 attached to the left end of the head support member 3 is pressed against it by a spring 17. Therefore, the operating member 6 always moves the inclined edge 29.
It is pushed from the right side and is biased toward the hand. When the operating member 6 is on the hand side, the roller 30 hits the front end of the inclined edge 29 and the head supporting member 3 moves to the leftmost side, and the magnetic head 18
is inserted into the cassette holder 2 through the notch 16. In this state, the pinch roller 21 is also inserted into the cassette holder 2 through the notch 15 and is pressed against the capstan shaft 8 by the spring 22. Further, when the pressing operation part 28 of the operating member 6 is pushed forward, the pressing protrusion 6a
are the front and rear legs 26 of the bifurcated leg 26 of the interlocking member 5.
a, 26b and pushes the front leg 26a, rotating the interlocking member 5. As the operating member 6 moves forward, the inclined edge 29 pushes the roller 30, moving the head support member 3 rightward and removing the magnetic head 18 from the notch 16. In this state, the pinch roller 21 is also pushed by the head support member 3 and comes to separate from the notch 15. Further, as the operating member 6 is pushed forward, the interlocking member 5 rotates so that the front and rear legs 26a and 26b of the bifurcated leg 26 sandwich the pressing protrusion 6a from the front and back, so that the cassette holder 2 is reset. When the operating member 6 is locked in position, the operating member 6 is prohibited from returning to the hand side by the rear leg portion 26b. Therefore, cassette holder 2
There is no problem of accidentally pulling the operating member 6 toward the hand side when the magnetic head 18 is in the reset position and moving the magnetic head 18 onto the insertion path of the cassette 13. Further, a normally closed power switch (not shown) is disposed in front of the operating member 6, and when the operating member 6 is pushed forward, the switch is released to stop the motor 9 and stop the tape. The recorder is switched from playback mode to stop mode.

In the above-mentioned mechanism structure, the conventional pivot structure of the interlocking member 5 is shown in detail in the exploded views of FIGS. 2a and 2b.

That is, in the case of figure a, a tap hole 51 is bored in the rising wall 50 of the fixed board 1, and the tapped hole 51 is fixed with a screw 52, and in the case of figure b, the tapped hole 51 is bored in the rising wall 50 of the fixed board 1. A shaft 53 of the sawn product is installed by caulking, and is locked by clamping with an E-ring 54.

``Problems that the invention attempts to solve'' However, the above structure has the following problems.

Since the shaft 53 is constructed by caulking the sawn material,
It is extremely poor in workability and is expensive.

There are many crimping holes in the vicinity of the fixed base plate 1, and it is easy for the crimping work to be lost or forgotten.

There are a large number of parts, so careful consideration must be given to their management.

In case of screw fastening, tap processing is required.
Inferior to work.

``Means for Solving Problems'' and ``Operations'' This invention was developed in view of the above circumstances, and its gist is that when a tape cassette is inserted into the cassette holder, the holder automatically resets. In a cassette type tape recorder, the playback operation is performed by moving the tape cassette from the set position to the set position, and when the cassette holder is moved from the set position to the set position, it automatically stops and the tape cassette is pushed back in the ejecting direction. A horizontal plate shaft portion with a neck shape is bent and extended from the upper end of the rising wall of the fixed substrate, and the interlocking member is provided with a shaft hole of a drilled keyhole in a predetermined direction, and the neck of the circular hole portion of the keyhole is provided in the interlocking member. Since it is pivoted by locking to the part, there is no need for caulking of the sawn material or tap processing, which completely eliminates the above-mentioned problems.

"Example" This will be explained in detail below based on the drawings.

FIGS. 1a and 1b are a developed view of the pivot structure of the present invention and an explanatory view of the state when it is installed.

In the figure, 55 is a rising wall 50 of the fixed substrate 1.
A neck portion 55a is formed by a horizontal plate shaft portion that is bent and extended from a predetermined portion of the upper end and brought out toward the outside of the fixed substrate 1 in the horizontal direction.

On the other hand, a keyhole-shaped shaft hole 56 is bored in the interlocking member 5 .

The shaft hole 56 is drilled in a predetermined orientation.

That is, when attaching the interlocking member 5 to the horizontal plate shaft portion 55, the long diameter of the shaft hole 56 is fitted in a posture that matches the width of the shaft portion 55, and the interlocking member 5 is rotated at the neck portion 55a. 55a and the circular hole portion 56a of the shaft hole 56, it will not be locked and disengaged unless it returns to its original posture.

However, as shown in Figure b, the interlocking member 5 reciprocates within a range of a predetermined angle θ corresponding to the set and reset positions of the cassette holder 2.
It suffices to lock within this range.

According to the configuration described above, the pivot portion is constructed only by punching and bending the fixed base plate 1 and the interlocking member 5, which eliminates the need for a turning shaft and an E-ring. This eliminates the need for the caulking process, and also eliminates the need for screws and tap processing.

The interlocking member 5 shown in FIGS. 1, 2 and 4 has a different shape in some parts, but this is due to the difference in the means for attaching the spring, and the movement of the interlocking member is the same.

"Effects of the Invention" As described above, according to the present invention, the need for costly parts such as sawn parts and the need for caulking and tapping have been achieved.

[Brief explanation of the drawing]

FIG. 1 is a developed view of the pivot portion of the interlocking member of the present invention, FIG. 2 is a developed view of the pivot portion of the conventional interlocking member, FIG. 3 is a plan view showing the mechanical part of a cassette tape recorder, and FIG. The figure is a left side view of the same, FIG. FIG. 8A is a plan view showing the relationship, FIG. 8A is a side sectional view showing the relationship between the fixed substrate and the locking member, and FIG. 55...Horizontal plate shaft part, 55a...Neck part, 56...
...Axis hole, 56a...Circular hole part.

Claims (1)

[Scope of utility model registration request] When a tape cassette is inserted into the cassette holder, the holder automatically moves from the reset position to the set position and begins playback, and when the cassette holder is moved from the set position to the set position, it automatically stops and the tape cassette is removed. In a cassette-type tape recorder that is pushed back in the direction, a horizontal plate shaft portion with a neck shape is bent and extended from the upper end of the rising wall of the fixed substrate, and the interlocking member has a keyhole drilled in a predetermined direction. A pivoting structure for an interlocking member in a cassette tape recorder, which has a shaft hole and is pivoted by locking the circular hole of the keyhole to the neck.