JPS6357866B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an opening/closing device, and an object thereof is to reliably perform opening/closing operations by parallel movement of, for example, a cassette holder of a tape deck with a simple structure.

In recent years, cassette decks have tended to become thinner, and as a result of this thinner structure, the cassette holder has been designed so that it can be opened by moving forward in parallel from the closed position. That is, as shown in FIGS. 1 and 2, a pair of L-shaped mounting plates 2 are screwed to a base plate 1 at a predetermined interval, and these mounting plates 2 have a long hole 3 and a pivot shaft. 4 is provided. The linear link members 5 and 6 are rotatably connected by a shaft 7, one end of the one link member 5 is attached to the mounting plate 2 by the shaft 4, and one end of the other link member 6 is attached thereto. A pin 8 provided in is inserted into the elongated hole 3. The pin 9 provided at the other end of the one link member 5 is inserted into a substantially L-shaped hole 11 provided on the side surface of the cassette holder 10, and the other end of the other link member 6 is connected to the cassette by a shaft 12. It is rotatably connected to the holder 10.

Then, when the cassette eject operation is performed from the closed position of the cassette holder 10 shown in FIG. 1 and shown by the solid line in FIG. and then from this position the shaft 12
It rotates around , and is brought to the position shown by the two-dot chain line, and the opening operation is completed. Closure occurs through the reverse process.

Since such an opening/closing mechanism uses link members 5 and 6 connected in an X-shape, in order to perform the opening/closing operation stably, the lengths of the link members 5 and 6 must be increased to some extent as shown in the figure. The need arose. If the link members 5 and 6 are short, there are drawbacks such as the cassette holder 10 stopping midway through opening, or the link members 5 and 6 being deformed when attempting to open the cassette holder forcibly. If the link members 5 and 6 have to be made this long, the length of the mounting plate 2 will inevitably become longer, and even if it is attempted to incorporate a mechanism other than the opening/closing mechanism around the cassette holder 10, it is difficult to implement it. It was something I couldn't do.

SUMMARY OF THE INVENTION Therefore, the present invention aims to eliminate such conventional drawbacks. Specifically, the present invention provides an opening/closing device that uses a T-shaped link member to reduce the mounting space for a mounting member. A cassette holder opening/closing device for a tape deck, which is one embodiment thereof, will be explained with reference to the drawings from FIG. 3 onwards. In the figure, reference numeral 13 denotes a mechanism board, and L-shaped mounting plates 15 are fixed on the left and right sides of the cassette holder 14 placement position on this board 13.
These mounting plates 15 are provided with two elongated holes 16 and 17, as shown in FIG. Reference numeral 18 designates a mechanism concealing plate, one end of which is pivotally connected to the pair of mounting plates 15 through a shaft 19. 20 is a symmetrical T-shaped link member, and pins 21 and 22 are installed at both ends of the horizontal piece 20a.
are inserted into and engaged with the elongated holes 16 and 17 of the mounting plate 15. Vertical piece 2 of this T-shaped link member 20
A substantially central portion of 0b is rotatably connected to the mechanism hidden plate 18 by a shaft 23, and an end portion thereof is rotatably connected to one side of the cassette holder 14 by a shaft 24. The mechanism hidden plate 18 is provided with a notch 18a for allowing the shaft 24 to escape. On the other end side of the cassette holder 14 is an approximately L
A letter-shaped groove 25 is provided, into which a pin 26 implanted on the side surface of the other end of the mechanism hidden plate 18 is inserted and engaged. 27 and 28 are reel shafts, and these reel shafts are connected to the cassette holder 1 through an opening provided in the mechanism hidden plate 18.
4 so that both side edges are engaged with a locked cassette (not shown).

The configuration is as shown in Figures 3, 4 and 5.
When the cassette eject operation is performed from the closed position of the cassette holder 14 shown by the solid line in the figure, the mechanism hidden plate 18 rotates in the direction of arrow a about the shaft 19, the pin 26 moves along the groove 25, and the T
The next link member 20 also rotates around the shaft 23, and the pin 21 moves in the direction of arrow b and the pin 22 moves in the direction of arrow c along the elongated holes 16 and 17, respectively. By this operation, the cassette holder 14 is moved in the direction of the arrow d, that is, translated parallel to the mechanism board 13, and brought to the position shown by the dashed-dotted line. Further, from this position, the cassette holder 14 rotates about the shaft 24 in the direction of arrow e, and the opening operation is completed. Closure occurs through the reverse process.

The shapes of the elongated holes 16, 17 and the T-shaped link member 20 for performing such opening/closing operations will be explained in more detail using FIG. 6.

In Figure 6, a rectangle with return lengths l and m
Divide the area of ABCD into two by the bisector EF of return AD and BC. and rectangle CDEF, rectangle
Draw diagonal lines on ABFE, and draw perpendicular lines from points D and A to the diagonals DE and AF to find their intersections, points G and H. At this time, the line segment
If the length of DG is n ₁ and the length of line segment AH is n ₂ , then
The length of each is the length of the elongated holes 16 and 17 on the mounting plate 15. That is, the long holes 16 and 17 are symmetrically located on the equilateral sides AF and DF of the isosceles triangle AFD.
In the same figure, the triangle found by the above method
Since GAB, IJF, and DHC are each geometrically congruent, line segment AD and line segment BC are parallel. Therefore, if a T-shaped link member 20 having the positional relationship of points A, G, and B is formed, the link member can be slid along the long holes 16 and 17 by the pins 21 and 22. The axis 24 corresponding to point B is translated in parallel for the reasons given above. It goes without saying that the configuration of the above embodiment can also be applied to simply opening and closing the lid.

As explained above, the opening/closing position of the present invention is the mounting member (mounting plate 1 in this embodiment) to which the lid (cassette holder 14 in this embodiment) is movably attached.
5) have two sliding paths (in this example, long holes 16 and 1).
7) is formed in such a positional relationship that the sliding paths are located on equal sides of an isosceles triangle (bisector triangle AFD in this example), and a left side, a Both ends of the horizontal piece of the right-symmetrical T-shaped link member are slidably engaged, and the end of the vertical piece is restricted to slide approximately parallel to the bottom of the isosceles triangle, and is also engaged with the lid. Since it is a combination of
Even if the T-shaped link member is made small, the lid can be opened and closed stably, and the mounting member can be installed in a small space as long as it can support the sliding movement of the T-shaped link member.

[Brief explanation of drawings]

Figure 1 is a perspective view showing a conventional lid opening/closing device;
The figure is a side view to explain the operation of the device.
The figure is a front view showing a lid opening/closing device according to an embodiment of the present invention, FIG. 4 is a side view of the device, FIG. 5 is a side view for explaining the operation of the device, and FIG. 6 is a side view of the device. It is a figure for explaining the shape of a long hole and a T-shaped link member. 14...Cassette holder, 15...Mounting plate,
16, 17... Long hole, 18... Mechanism hidden plate, 20... T-shaped link member, 20a... Horizontal piece, 20b... Vertical piece, 21, 22... Pin.

Claims (1)

[Claims] 1. Two sliding paths are formed in the mounting member to which the lid is movably attached, with a positional relationship such that the sliding paths are located on the equilateral sides of an isosceles triangle, and the two sliding paths are Both ends of the horizontal pieces of the left and right symmetrical T-shaped link members are slidably engaged with the road, and the ends of the vertical pieces are restricted to slide substantially parallel to the base of the isosceles triangle. An opening/closing device that engages with the lid.