JPH0441485Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Technical Field] The present invention relates to a structure for attaching a leaf spring for holding down a cassette of a tape recorder, and in particular, it facilitates the work of attaching a leaf spring for holding down a cassette to a leaf spring support plate. Therefore, the present invention relates to a structure in which the leaf spring can be attached by simply inserting one end of the leaf spring into the slit of the leaf spring support plate and rotating it in the plane direction.

[Prior Art] FIG. 5 shows an example of a conventional cassette type tape recorder mechanism.

That is, it is rotatably supported by the chassis 1,
In addition, by inserting the tape cassette 4 into the cassette holder 3 which is biased in the operating position direction (downward) by the spring 2, the locking of the cassette holder 3 by the locking member 5 is released, and the cassette holder 3 to the operating position, the lower end of the extension leg 7 of the leaf spring support plate 6 stretched between the side plates 3a and 3b of the cassette holder 3 is brought into contact with the upper surface of the chassis 1, and this plate is rotated. Rotate the spring support plate 6,
The top surface of the tape cassette 4 is held down by a cassette holding plate spring 8 whose one end is fixed to the same plate spring support plate 6.

Note that 9 and 10 in the figure are a take-up reel receiver and a capstan, respectively, which are mounted so as to protrude from the upper surface side of the chassis 1, and 11 and 12 in the figure.
are the playback head and the pinch roller, respectively.

Further, the mounting structure of the cassette holding leaf spring 8 to the leaf spring support plate 6 in this tape recorder is as shown in FIGS. 6 to 8.

That is, the leaf spring support plate 6 has a slit 13 through which one end of the leaf spring 8 is inserted, and the endmost engaging portion 14 of the leaf spring 8 is inserted from the upper surface to the lower surface side to hold the leaf spring 8 in a predetermined position. Engagement hole 1 to hold in mounting position
5, and a bulging portion 17 that fits into a square hole 16 provided in the leaf spring 8 to prevent the leaf spring 8 from coming off.

Therefore, when attaching the leaf spring 8 to the leaf spring support plate 6, first insert one end of the leaf spring 8 into the slit 17 as shown in FIG. 14 is inserted into the engagement hole 15 while pressing it downward and bending it. Then, while pushing strongly forward and inserting the endmost engaging part 14 into the lower surface side of the leaf spring support plate 6, the square hole 16 is fitted into the bulge part 17 by the elastic return of the leaf spring 8 itself.

[Problems to be solved by the invention] In the conventional cassette holding plate spring mounting structure, after inserting one end of the plate spring 8 through the slit 13,
With the fingertips of one hand holding the tape recorder mechanism main body or the leaf spring support plate, press the endmost engaging portion 14.
It was necessary to forcefully push the entire leaf spring 8 forward with the other hand while pressing downward to bend it. In order to quickly carry out such attachment work, both hands must be skillfully worked together, which poses a problem in that the work requires skill.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cassette-holding plate spring mounting structure for a tape recorder, which eliminates such problems and allows the cassette-holding plate spring to be quickly mounted without requiring any skill. There is a particular thing.

[Means for solving the problem] The present invention includes a slit through which one end of the cassette-holding leaf spring is inserted into the leaf spring support plate, and a pivot projection protruding into the slit from the edge of the slit. A pivot hole into which the pivot protrusion is fitted is provided on one end side of the cassette holding plate spring, and further,
Provided on both the leaf spring support plate and the leaf spring are an engaging portion that engages with each other to hold the leaf spring at a predetermined mounting position, and a sliding contact portion that slides into contact with each other as the leaf spring rotates; At least one of the sliding contact portions is inclined with respect to the surface of the leaf spring, and when the leaf spring rotates about the several protrusions as a fulcrum, both sliding contact portions are brought into sliding contact with each other, and the inclination is applied to one end of the leaf spring. is bent in the plate thickness direction so that both sliding contact portions come off at the ends and the plate springs return elastically, so that both engaging portions engage with each other.

[Function] When attaching a leaf spring to a leaf spring support plate,
The leaf spring is inserted into the slit of the leaf spring support plate from one end thereof, and the pivot hole of the leaf spring is fitted into the pivot protrusion of the leaf spring support plate. By rotating the leaf spring around the pivot projection, the leaf spring is deflected while the sliding contact parts of the leaf spring and the leaf spring support plate are in sliding contact with each other, and the engaging parts of the leaf spring and the leaf spring support plate are engaged with each other. Installation work is completed.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is a plan view showing the mechanism of a cassette tape recorder, and FIG. 2 is a partial perspective view thereof.

A cassette holder 21 is mounted on a chassis 20 made of a substantially rectangular metal plate when viewed from above, with both ends on the side of the cassette insertion port being pivotally supported by bent portions 22a and 22b of the chassis 20, so that the cassette holder 21 can freely tilt with respect to the chassis 20. It's summery. The cassette holder 21 has a chassis 20
The non-operating position locking member 23 provided at the upper left position in FIG. 1 locks the chassis 20 in a position inclined with respect to the bottom plate portion.

The non-operating position locking member 23 is attached to the cassette holder 2.
1, an eject piece 23a that protrudes long toward the upper surface of the bottom plate of the cassette holder 21;
and a locking piece 23b that comes into contact with the lower surface of the bottom plate of the cassette holder 21 to hold the cassette holder 21 in a non-operating position, and the lower end is rotatably attached to the chassis 20. A torsion coil spring 25 is hooked between the rotating end of the eject piece 23a and the connecting end of the rotating member 24 connected to the rotating end of the cassette holder 21.
This spring 25 urges the ejection piece 23a in the direction opposite to the insertion direction of the tape cassette 4 (cassette eject direction) when the cassette holder 21 is in the non-operating position, and at the same time pushes the cassette holder 21 in the operating position direction ( (Toward the bottom of the chassis 20)
It is biased towards.

In addition, the chassis 20 includes an eject operation member 2.
6 is arranged along the left side plate from the back side of the bottom plate of the chassis 20, and this eject operation member 26
is slidable in the cassette insertion direction. When the eject operating member 26 is pushed in the direction of arrow I when the cassette holder 21 is in the operating position, the rotating member 24 is pushed by the eject operating member 26 and rotates, and the rotating end of the cassette holder 21 is rotated. Push up to non-operating position. At this time, the eject operation member 26 is locked at the push-in operation position by the rotating member 24. Then, when the cassette holder 21 tilts to the non-operating position, the locking piece 23b engages the spring 2.
At the same time, the tape cassette 4 in the cassette holder 21 is pushed back in the ejecting direction by the ejecting piece 23a.

A motor 27 is attached to the rear side extending portion 20a of the chassis 20. This motor 27 is
When the cassette holder 21 is in the non-operating position, the power is cut off by the switch 28, and when the cassette holder 21 is in the operating position, the cassette holder 21 is energized and rotates by switching the switch 28.

Further, a capstan 29 and a take-up reel receiver 30 are attached to the bottom plate of the chassis 20.
These are rotationally driven by the motor 27.

A head mounting plate 31 that slides in a direction perpendicular to the cassette insertion direction (horizontal direction in FIG. 1) is provided on the back surface of the bottom plate of the chassis 20. On this mounting plate 31, a playback head 32 and a pinch roller are mounted. 3
3 is attached so as to protrude from the upper surface side of the bottom plate portion of the chassis 20. This head mounting plate 31 is always biased toward the left in FIG. 1 by the tension of a spring (not shown), and is
Due to the interlocking relationship with 6, the eject operation member 26
When the head mounting plate 31 is in the push-in position, the head mounting plate 31 retreats to the right in FIG.
6 separates from the rotating member 24 and returns, the head mounting plate 31 moves forward to the left in FIG.
The pinch roller 33 is brought into pressure contact with the capstan 29, and the reproducing head 32 is brought into contact with the tape in the tape cassette 4 to perform a reproducing operation.

The cassette holder 21 has side plates bent upward at the left and right edges of the bottom plate, and between the upper parts of both sides of the plates, an elongated leaf spring support plate 34 is rotatably suspended horizontally. A cassette holding plate spring 35 is fixed at one end to an intermediate portion of the plate spring support plate 34 so as to protrude largely toward the cassette insertion opening.

FIG. 3 shows a structure for attaching the cassette holding leaf spring 35 to the leaf spring support plate 34. As shown in FIG.

That is, the edge of the leaf spring support plate 34 on the cassette insertion opening side is bent upward, and a slit 36 is formed at the bent corner. Further, a pivot projection 37 is provided that projects downward (into the slit 36) from the upper edge of the slit 36. Furthermore, the area where the slit 36 is provided is locally widened, and this wide area has an approximately L-shaped opening 38 and an engagement hole 39 located between both sides of the L-shape. It is perforated. Of the boundary between the opening 38 and the engagement hole 39,
A radial boundary portion of the arc centered on the pivot projection 37 forms a sliding contact portion 40 that slopes upward toward the inside of the opening 38 .

At the left end of the leaf spring support plate 34 in FIG.
A contact portion 41 is formed that extends in a direction opposite to the cassette insertion port with respect to the rotational axis of the leaf spring support plate 34, and when the cassette holder 21 is in the non-operating position, this contact portion 41 is used to hold the torsion coil spring. Due to the elastic force of 42, the cassette holder 21 is brought into contact with the left side plate portion of the cassette holder 21. When the cassette holder 21 is tilted to the operating position, the corresponding contact portion 41 comes into contact with a receiving portion 43 (see FIG. 2) protruding from the left side plate of the chassis 20, and is separated from the left side plate of the cassette holder 21. As a result, the leaf spring support plate 34 rotates against the biasing force of the torsion coil spring 42, causing the other end of the cassette holding leaf spring 35 to approach the bottom plate of the cassette holder 21.

Therefore, when the tape cassette 4 is inserted into the cassette holder 21 and the cassette holder 21 is tilted toward the operating position, the top surface of the tape cassette 4 is pressed by the other end of the cassette holding leaf spring. .

On the other hand, a small circular pivot hole 44 into which the pivot protrusion 37 is fitted is bored at one end of the leaf spring 35, and the portion further toward the end is approximately U-shaped when viewed from the side. It is bent into a shape, and the rising piece at the end thereof serves as an engaging portion 45 that engages with the engaging hole 39 from below. The upper end edge of the engaging portion 45 is cut diagonally at both corners, and the cut portion on the left side in FIG. There is.

Cassette holding plate spring 3 configured as above
5 to the leaf spring support plate 34, first insert one end of the leaf spring 35 into the slit 36 from the cassette insertion opening side, and fit the pivot hole 44 into the pivot protrusion 37 as shown in FIG. And leaf spring 3
5 into the opening 38, and the sliding contact portion 46 on the leaf spring 35 side is inserted into the support plate 34.
A plate spring 35 is placed opposite the sliding contact portion 40 on the side from the side.
The other end is rotated about the pivot projection 37 in the direction of the arrow in FIG. Then, due to the sliding contact between both inclined sliding contact parts 40 and 46, one end of the leaf spring 35 is bent in the plate thickness direction, and the engaging part 4
5 toward the engagement hole 39. When both sliding contact parts 40 and 46 come off at the end, the leaf spring 3
5, the engaging portion 45 comes to engage with the engaging hole 39 from below, and one end of the leaf spring 35 engages with the leaf spring support plate 34 as shown by the imaginary line in FIG.
Fixed.

Next, FIG. 4 shows a second embodiment of the present invention. In this embodiment, the shapes of the engagement hole 39, the engagement part 45, and the sliding contact parts 40, 46 of the first embodiment are changed, and the shape of the cassette holding plate spring 55 provided on the plate spring support plate 54 is changed. The slit 56 through which the one end is inserted, the pivot projection 57 protruding into the slit 56, the pivot hole 58 provided in the leaf spring 55 into which the pivot projection 57 is fitted, and the like are the same as in the first embodiment.

An extending portion 59 extending in a substantially S-shape in the direction opposite to the cassette insertion opening is provided at the intermediate portion of the leaf spring support plate 54 where the slit 56 is provided.

The extending portion 59 has a right edge 60a (illustrated in the figure) of the base extending in the cassette insertion direction and a left edge 60b (illustrated at the extreme end).
This constitutes an engaging portion that restricts rotation of the leaf spring 55. Further, the right edge of the extending portion 59 at the farthest end extending in the cassette insertion direction is connected to the plate spring support plate 5.
The sliding contact portion 61 is on the fourth side.

On the other hand, one end of the cassette holding plate spring 55 is formed into a substantially U-shape as in the first embodiment, but the upper edge of the uppermost rising piece becomes higher as it goes from the left side to the right side in the figure. Leaf spring 5 inclined to
This serves as a sliding contact portion 62 on the 5 side. Further, the right side edge of the rising piece in the drawing serves as an engagement portion 63 on the leaf spring 55 side.

In any of the embodiments described above, the work of attaching the cassette holding leaf springs is simply done by simply attaching the leaf springs 35, 5.
5 into the slits 36, 56 of the leaf spring support plates 34, 54 to fit the pivot holes 42, 58 and the pivot protrusions 37, 57, and then hold the other end of the leaf spring at a constant position. Since there is no step of bending the tip of the leaf spring with the hand holding the tape recorder mechanism body or the leaf spring support plate, the leaf spring can be easily and quickly moved with one hand. It can be attached to the support plate.

In the first embodiment, the sliding contact portions 40 and 46 of both the leaf spring support plate and the leaf spring are inclined with respect to the surface of the leaf spring, and in the second embodiment, the sliding contact portion 62 on the leaf spring side is inclined.
Although only the sliding contact portion on the leaf spring support plate side may be tilted.

[Effects of the invention] According to the invention, when attaching the cassette-holding leaf spring to the leaf spring support plate, it is necessary to grasp the tape recorder mechanism body or the leaf spring support plate with one hand,
The installation work is completed extremely easily by simply inserting one end of the cassette holding plate spring into the slit with the other hand and rotating it. At this time, the rotation of the leaf spring is performed using the pivot protrusion as a fulcrum, but the pivot protrusion is located close to the tip where the load is applied, and the sliding portion of at least one of the support plate or the leaf spring is in contact with the pivot protrusion. Since it is tilted, if a slight force is applied to the other end of the leaf spring to rotate it, it can be rotated with extremely light force. Moreover, unlike the conventional structure, there is no need to press the tip of the leaf spring with one hand while working, so the work can be done quickly without requiring any skill.

[Brief explanation of drawings]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a plan view of a tape recorder mechanism, FIG. 2 is a partial perspective view of the mechanism, and FIG. 3 is a plate. FIG. 4 is an exploded perspective view showing a spring mounting structure, FIG. 4 is an exploded perspective view of a leaf spring mounting structure according to a second embodiment of the present invention, and FIGS. 5 to 8 show conventional examples.
FIG. 5 is a plan view of the cassette tape recorder mechanism, and FIG. 6 is a partial perspective view showing the leaf spring mounting structure.
FIGS. 7 and 8 are a partial perspective view and a partial sectional view showing the procedure for attaching the leaf spring. 4... Tape cassette, 20... Chassis, 2
1... Cassette holder, 25... Torsion coil spring, 34, 54... Leaf spring support plate, 35, 55...
...Cassette holding plate spring, 36,56...slit, 37,57...pivot projection, 39...engaging hole,
40, 46, 61, 62...Sliding contact part, 41...Abutting part, 44, 58...Pivot hole, 45, 60a, 6
0b, 63...Engaging portion.

Claims (1)

[Claims for Utility Model Registration] (1) By inserting a tape cassette into a cassette holder that is tiltably supported by a chassis and biased in the direction of the operating position by a spring, the locking of the cassette holder is released; The cassette holder is rotated in the direction of the operating position, and a part of the leaf spring support plate, which is rotatably spanned between both side plates of the cassette holder, is brought into contact with a fixed part on the chassis to release the leaf spring. In a tape recorder cassette holding plate spring mounting structure in which a supporting plate is rotated and a cassette holding plate spring having one end fixed to the plate spring supporting plate presses the upper surface of the tape cassette, the plate spring supporting plate To,
A slit through which one end of the cassette holding leaf spring is inserted, and a pivot projection projecting into the slit from an edge of the slit are provided, and the pivot projection is fitted into one end of the cassette holding leaf spring. providing a pivot hole for mating, and further comprising an engaging portion on both the leaf spring support plate and the leaf spring that engages with each other to hold the leaf spring at a predetermined mounting position;
and sliding contact portions that slide into contact with each other as the leaf spring rotates, and at least one of the sliding contact portions is inclined with respect to the surface of the leaf spring so that when the leaf spring rotates about the pivot projection, both of the sliding contact portions are provided. One end of the leaf spring is deflected in the plate thickness direction due to the inclination while the sliding contact parts of the two are in sliding contact with each other, and both the sliding contact parts come off at the end and the leaf spring elastically returns, thereby reducing the engagement between the two. A plate spring mounting structure for holding down a cassette of a tape recorder, characterized in that joint parts engage with each other. (2) The mounting structure for a tape recorder cassette holding plate spring according to claim 1, wherein the sliding contact portion of the plate spring support plate is inclined with respect to the surface of the plate spring. (3) The mounting structure for a cassette-holding plate spring for a tape recorder according to claim 1, wherein the sliding contact portion of the cassette-holding plate spring is inclined with respect to the surface of the plate spring.