JPH0512566B2 - - Google Patents

Description

Detailed Description of the Invention <Field of Application of the Present Invention> The present invention relates to a rotating device formed of plastic and used as, for example, a hinge, a clip, a fastener, etc., and particularly to a rotating device with a spring function. Regarding.

<Prior art> (Fig. 13) As a plastic rotation device that can rotate around a rotation fulcrum and has a spring function,
Conventionally, a structure as shown in FIG. 13 has been known.

That is, the two plate parts 30 and 31 are made bendable by the thin hinge parts 32a and 32b, and the two
Two long holes 33a parallel to the two plate parts 30, 31,
33b is provided to form a leaf spring portion 34 having a bent portion 34a between the elongated holes 33a and 33b.

Therefore, the plate portion 31 is moved toward the hinge portion 32 in the direction of the arrow.
When rotated around a and 32b, the leaf spring portion 34
Both plate parts 30, 31 are urged to close by the spring function of. (Note that 35 and 36 are mounting holes.) <Problems to be Solved by the Invention> However, in such a conventional rotation device, in order to provide a sufficiently strong spring, the plate spring portion 3
Since the width L of 4 had to be made sufficiently large, there was a drawback that the overall size became large.

In addition, when trying to reduce the overall size, in order to obtain sufficient spring force, it is necessary to
Since the width L of the hinge parts 32a and 32b cannot be made very small, the width l of the hinge parts 32a and 32b has to be made small. For this reason, the strength of the thin hinge parts 32a and 32b, which serve as rotational fulcrums, is weakened, and since the thinner parts are bent and rotated as rotational fulcrums, repeated rotations cause the thinner parts to become weaker. It had the disadvantages of being easily destroyed, making it impossible to use it for a long period of time, and not being able to achieve very strong spring force.

<Object of the present invention> The present invention has been made based on the above-mentioned circumstances, and has a simple structure, can be made compact, and has a structure of a rotation fulcrum that engages a shaft and a recessed part to generate a strong spring force. The object is to provide a durable, plastic-molded pivoting device.

<Embodiments of the present invention> (Figures 1 to 8) Examples of the present invention will be described below.

1 to 3 show an embodiment in which the rotating device of the present invention is used as a hinge.

In these figures, 1 is the hinge of this example, 2
3 is a flat base of the hinge 1, and 3 is a mounting hole provided in the base 2.

At one end 2a in the width direction of the base 2, first and second support portions 4, 5 are provided at approximately the center thereof.
are erected facing each other at predetermined intervals. The first and second support portions 4 and 5 are plate-shaped bodies that protrude vertically from the base 2, and have a semicircular portion 4a and a semicircular portion 4a at the upper end thereof.
5a, and is provided with notches 6, 7 that are inclined downward from the center of the semicircular portions 4a, 5a toward the opposing surfaces 4b, 5b.

Opposing surfaces 4b, 5 of the first and second support parts 4, 5
b is provided with recesses 8 and 9 of a predetermined depth and semicircular upper portions into which shafts 19 and 20, which will be described later, are inserted. A base part 1 for receiving the shafts 19 and 20 inserted into the recesses 8 and 9 on the lower side.
0 and 11 are protruded from the base 2 so as to be located at the lower portions of the opposing surfaces 4b and 5b of the first and second support sections 4 and 5.

An elastic part 13 is bendably connected to the base part 2a of the base part 2 at an intermediate part between the first and second support parts 4 and 5 via a thin first hinge part 12. ing. At the tip of this elastic part 13,
A base portion 15 is bendably connected via a thin second hinge portion 14 . 16 is a mounting hole provided in the flat base 15.

The elastic portion 13 is shaped like a strip curved in a substantially C-shape so that the center bulges downward (in FIG. 2), and the center bulge 13a is thick, and both sides of the elastic portion 13 are thick. The wall thickness of portions 13b and 13c gradually decreases.

The end portion 15a of the base portion 15 has first and second rotating arm portions 17, on both sides of the second hinge portion.
18 extends in the direction of the first and second support portions 4 and 5.

Outer surfaces 17 of the first and second rotating arms 17 and 18
The distance between a and 18a is set to be slightly narrower than the distance between the inner surfaces 4a and 5a of the first and second support portions 4 and 5, and the distance between the first and second rotating arm portions 1
On the outer surfaces 17a and 18a of 7 and 18, the first support part 4 and the second support part 5 are provided facing outward.
A cylindrical shaft 1 for fitting into the recesses 8 and 9 of
9 and 20 are provided protrudingly. The shafts 19 and 20 have tapered portions 19a and 20 that are inclined toward the tip on the outer surface side.
It is equipped with a.

The hinge 1 having such a shape is integrally molded from plastic having appropriate rigidity and elasticity, and therefore, the first and second hinge parts 12 and 14 are bendable and have approximately C. The elastic part 13 curved in a letter shape has first and second hinge parts 12 at both ends,
This deformation generates a strong restoring force, and also pushes the tips of the first and second rotating arms 17 and 18 toward each other. so that it can be transformed,
The wall thickness of each part is set, and it is integrally molded in the state shown in FIGS. 1 to 3.

<Operation of the above embodiment> Next, the operation of the hinge 1 of the above embodiment will be described.

First, the first hinge portion 12 is bent from the shape as shown in FIGS.
3) Rotate toward the base 2 side. The distance between the outer surfaces 17a and 18a of the first and second rotating arms 17 and 18 is the distance between the opposing surfaces 4b and
5b, and the shafts 19 and 20 are provided to protrude outward from the outer surfaces 17a and 18b of the first and second rotating arm portions 17 and 18. The shafts 19 and 20 abut on the upper surfaces of the semicircular portions 4b and 5b of the first and second support portions 4 and 5.
Furthermore, when rotational force is applied, the elastic portion 13 is deformed in a direction in which the distance between the first and second hinge portions 12 and 14 at both ends increases due to the abutment of the shafts 19 and 20. , 20 against the notches 6, 7 and push them down, the first and second rotating arms 17, 1 move along the notches 6, 7.
It descends while deforming so that the distance between the numbers 8 becomes narrower,
It reaches the base parts 10 and 11, and the first and second rotating arm parts 1
The shaft portions 19 and 20 are fitted into the recesses 8 and 9 of the first and second support base portions 4 and 5 due to the elastic restoring forces of the shaft portions 7 and 18 . Figures 4 and 5 show this state.

That is, the rotating arms 17 and 18 and the base 15 are substantially perpendicular to the base 2, and the elastic part 1
The first hinge part 12 and the second hinge part 14 of No. 3 are located at the same position in the vertical direction (in FIG. 5) that is laterally shifted from the axes 19 and 20, and the elastic part 13 is elastically deformed. It has become a state where it has not been done.

From this state, the rotating arm 1 can be rotated in either clockwise or counterclockwise direction around the shafts 19 and 20.
Even if the arms 7 and 18 (and the base 15) are rotated, the elastic portion 13 is elastically deformed, so the rotating arms 17 and 18 (and the base 15) are maintained in this state.

Next, as shown in FIG. 6, the base 15 (and the first and second rotating arms 17, 18) is rotated counterclockwise about the shafts 19, 20.
The elastic part 13 is deformed so that the distance between the first hinge part 12 and the second hinge part 12 increases (l ₂ >
l ₁ ), this deformation generates an elastic return force F.

As the elastic return force F is resisted and the shaft 19 is further rotated, the distance between the first and second hinge parts 12 and 14 gradually increases, and as shown in FIG. , 20, second hinge part 14
When the angle becomes a straight line, it becomes maximum (l ₃ ), and when this rotation angle (approximately 45 degrees) is exceeded, the distance between the first and second hinge parts 12 and 14 reverses in the direction of decreasing. Therefore, the elastic return force F of the elastic portion 13
further acts in the direction of rotation in the same direction, and the first
The rotating arms 17 and 18 (and the base 15) are urged to rotate in the direction of the first base 2.

In this way, the rotating arms 17, 18 (base 1
5) becomes substantially parallel to the base 2, as shown in FIG. The state is the same as in Figure 5, and the elastic part 1
3 is in a state where it is not elastically deformed. Therefore, it is maintained in this state.

Conversely, in order to open the base 15 from the base 2, the first hinge part 12, the shafts 19, 20, and the second hinge part 14 are rotated in the opposite direction against the elastic return force F. When it becomes a straight line, the elastic return force F acts to further rotate it in the same direction, and it is maintained in the substantially vertical state shown in FIG.

Therefore, one base 2 of this hinge 1 is fixed to, for example, the opening edge (not shown) of the box body through its mounting hole 3, and the other base 15 is fixed to the edge of the opening/closing door (not shown). ) can be used as a hinge with a spring function that can be held in the open and closed positions at approximately 90 degrees by fixing it through its mounting hole 16.

<Other Embodiments of the Present Invention> (FIGS. 9 to 12) FIG. 9 shows another embodiment in which the rotating device of the present invention is used as a fastener.

This embodiment is used as a fastener for fixing a printed circuit board P to the chassis C of an electrical device, for example, so that the printed circuit board P can be opened at approximately 90 degrees for repair and inspection. For example, an anchor-shaped locking part 21 is protrudingly provided on one side of the base 15 for press-fitting into the mounting hole C1 of the chassis C and fixing it. For example, an anchor-shaped locking portion 22 is provided in a protruding manner for fixing.

Therefore, as shown in FIG. 9, one end of the printed circuit board P is fixed to the chassis C with the base 2 and the base 15 in a parallel state, and the other end of the printed circuit board P is fixed with another fastener (not shown). In this way, the printed circuit board P can be attached in parallel to the chassis C, and
By removing the fastener at the other end, the printed circuit board P can be rotated and held substantially perpendicularly to the chassis C, as shown by the chain line.

FIG. 10 shows another embodiment in which the rotating device of the present invention is used as a clip.

In this embodiment, the base 2 in FIGS. 1-8,
The base 15 serves as clamping members 23 and 24 each consisting of a strip plate having a curved tip.

Therefore, the holding members 23 and 24 (and the first and second
By rotating the rotating arms 17, 18), an object can be held between the tip portions of the holding members 23, 24. Therefore, for example, the laundry string D can be passed through the inside of the curved elastic portion 13 and hung from the string D to be used as a clothespin.

In addition to the embodiments described above, it goes without saying that the rotating device of the present invention can be applied to various uses. For example, one base 2 may be formed as an opening edge of a container body through which a cap is opened and closed. However, if the other base 15 is formed as the edge of the cap, it can be applied to a cap mechanism that can be opened and closed, and can also be applied to binders, futon clips, etc.

Although the embodiments of the present invention have been described above, various changes can be made in the configuration of each part.

For example, in the embodiment, the shaft parts 19 and 20 are provided protrudingly at the tips of the first and second rotating arm parts 17 and 18, and the recesses 8 and 20 are provided in the first and second support parts 4 and 5, respectively. 9 was provided, but this was reversed, and recessed portions were provided in the first and second rotating arm portions 17 and 18, and shaft portions were provided in the first and second support portions 4 and 5 to protrude. Good too.

Further, in the above embodiment, the first and second rotating arms 17 and 18 engage with the inner surfaces of the first and second support bases 4 and 5; Arm part 17,1
8 may be engaged with the first and second support portions 4 and 5 from the outside.

In addition, two rotating arm portions 17, 18 (first to third
Instead of the case shown in Figure), one rotating arm with shafts 19 and 20 protruding from both ends thereof is provided, and the first and second support sections 4 and 5 are made flexible so that they can be rotated. Arm first,
The shaft 1 is press-fitted between the second support base parts 4 and 5.
9 and 20 may be fitted into the recesses 8 and 9 of the first and second support portions 4 and 5.

In addition, on the contrary, two support base parts 4, 5 (first to third
Instead of the structure shown in FIG.
Shafts 19 and 20 are protruded from the inner surface of the tip of shaft 1.
9 and 20 may be fitted into the recesses 8 and 9.

In addition, each part can be further deformed. For example, if the elastic part 13 fulfills the spring function through elastic deformation, the elastic part 13 is not limited to the C-shape, but also has a U-shape, a V-shape, and a bellows shape. , or any other suitable shape.

Alternatively, instead of integrally molding the whole, the base 2 and the elastic part 13 are separated, as shown in FIG.
A U-shaped notch 25 is provided in the end portion 2a of the elastic portion 13, and engagement shafts 26, 26 are protruded from opposite end surfaces thereof, and shaft holes 27, 26 are provided in the end surface of the end portion 13b of the elastic portion 13.
27 may be provided, and the engagement shafts 26, 26 may be rotatably engaged with the shaft holes 27, 27.

In addition, in FIG. 11, 28 is the engagement shaft 26, 26.
For easy insertion of the shaft into the shaft holes 27, 27,
Notch for facilitating elastic deformation of 3b, 27
a is an inclined groove for guiding the engagement shaft 26 into the shaft hole 27;

In addition, as shown in FIG.
The plate portion 29 may be fixed to the end portion 2a of the base portion 2 by adhesive or other means.

Further, the relationship between the base portion 15 and the other end 13b of the elastic portion 13 may be configured in the same manner as in FIGS. 11 and 12.

<Effects of the present invention> As explained above, the rotating device of the present invention configures the first and second engaging portions that rotatably engage with each other as separate parts, and then engages them. This makes it possible to obtain a strong pivot point, which can withstand long-term use.Since the pivot point can withstand strong forces, the elastic part has a strong elastic return force. By adopting such a shape, it is possible to obtain a much stronger spring function than in the past, and it is also possible to reduce the size.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention in a molded state, FIG. 2 is a cross-sectional view of FIG. 1, and FIG. 3 is a partially cutaway perspective view of the same.
FIG. 4 is a perspective view showing a state in which the shaft portion is fitted into the recess, FIG. 5 is a sectional view thereof, and FIGS. 6 to 8 are operation explanatory diagrams showing the rotational movement of the rotating arm portion. 9th to 12th
The figures are front views showing other embodiments of the present invention. FIG. 13 is a perspective view of a conventional device. DESCRIPTION OF SYMBOLS 1... Hinge, 2... Base, 4... First support part, 5
...Second support part, 8, 9...Concave part, 12...First hinge part, 13...Elastic part, 14...Second hinge part, 15...Base part, 17...First rotating arm part, 18 …
Second rotating arm portion, 19, 20...axis.

Claims (1)

[Scope of Claims] 1. A base, a support part that is erected at the end of the base and has a first engaging part, and a support part that is rotatably connected to the first engaging part of the support part. A rotating arm portion having a second engaging portion at its tip portion for engagement, and a middle portion having an elastic restoring force that returns when deformed so that the distance between both ends becomes large. an elastic part that bulges out and is bent or rotatably connected at both ends to the end of the base and the other end of the rotating arm; The mating portion is engaged with the first engaging portion of the support base portion, and the elastic portion is moved in a direction in which the rotating arm portion approaches the base portion about the first and second engaging portions. When the arm is rotated against the elastic return force and rotated beyond a predetermined rotation angle, the rotation arm is urged in a direction toward the base by the elastic return force of the elastic section. A rotation device molded from plastic, wherein the base and the rotation arm are held in contact or in close proximity.