JPH1019034A - Helical torsion coil spring and hinge structure with helical torsion coil spring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of component items. SOLUTION: A coil 2 is spacedly coiled, and a helical torsion spring 1 with expansion force P4 in the longitudinal direction of the coil 2 is installed to a connection pin 13 which openably connects both development sections 11 and 12, and the projected sections 19 provided in a plate 14, which is held between the development section 12 and the spring 1, are fitted in the through holes 17 and 18 which are made in both of the development sections 11 and 12 by the expansion force P4 in the longitudinal direction of the coil 2 when both of the development sections 11 and 12 are developed to a prescribed angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a torsion coil spring and a hinge structure with a torsion coil spring, and more particularly to a torsion coil spring and a hinge structure with a torsion coil spring used for an opening / closing mechanism having a stopper function.

[0002]

2. Description of the Related Art An example of a conventional hinge structure with a torsion coil spring is disclosed in Japanese Patent Laid-Open No. Sho 59-77119. FIG. 8 is a plan view of the hinge structure with the torsion coil spring (hinge closed state), and FIG. 9 is a plan view of the hinge structure (hinge open state).

Referring to FIG. 8, a conventional hinge structure with a torsion coil spring includes a first developing member 12 which is rotatably connected to each other via a developing member connecting pin 11 and whose rotation range is restricted. A second torsion coil spring 14 attached to the unfolding member connecting pin 11 and biasing the two unfolding members 12 and 13 to open or close;
A first link 18 rotatably connected at one end to each other via a link connecting pin 15 and rotatably connected at the other end to a first connecting member 16 and a second connecting member 17, respectively.
And the second link 19 and the second linking pin 15 attached to the link connecting pin 15 to elastically hold the first and second developing members 12 and 13 in a state in which the first and second developing members 12 and 13 are mutually rotated to the limit positions by the first torsion coil spring 14. And a torsion coil spring 20.

In this hinge structure, the deploying member 12 and the deploying member 13 are rotatably connected by a connecting pin 11, and the deploying force P1 is obtained by the torsion coil spring 14, whereby the deploying member 12 and the deploying member 13 are connected to each other. To expand.

The links 18 and 19 have a channel cross section, and are rotatably connected by connecting pins 15.
The closing force P2 is obtained by the second torsion coil panel 20, and thereby serves to assist the deployment force P1.

[0006] Next, referring to FIG.
3 is completed, the second torsion coil panel 20
The closing force P2 serves as a stopper for maintaining the deployed state.

The coil springs 14 and 20 are springs having expansion and contraction forces only in the torsion direction, and the coils are closely wound.

[0008]

However, the conventional fulcrum structure of the hinge structure having a preload in the opening and closing direction by a torsion coil spring generates a force only in the opening and closing direction of the opening and closing object to be opened and closed by the hinge. Only worked to help.

For this reason, a link and a torsion coil spring are used as stoppers in addition to the opening / closing member in order to maintain a predetermined deployment angle, so that the number of parts increases, and the structure is complicated and expensive. Further, the angle of opening and closing cannot be arbitrarily selected.

Accordingly, an object of the present invention is to reduce the number of parts,
An object of the present invention is to provide a torsion coil spring and a hinge structure with a torsion coil spring, which are capable of simplifying the structure, reducing the cost, and arbitrarily selecting an opening and closing angle.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a torsion coil spring having an expansion / contraction force in a torsion direction. It also has a stretching force.

According to another aspect of the present invention, there is provided a first development portion having a U-shaped cross section,
A second expanding portion having a U-shaped cross section fitted inside the first expanding portion, a connecting pin for opening and closing the two expanding portions, and a convex portion on one of the first expanding portion and the second expanding portion; A stopper means for fixing the two developing portions at a predetermined developing angle by providing a concave portion to be fitted with the connecting portion; and a mounting means attached to the connecting pin to apply a torsional expansion / contraction force in the developing direction, and to make the coil portion a space-wound coil. Thereby, a torsion coil spring for pressing the second developing portion against the first developing portion by the coil portion is provided.

[0013]

According to the present invention, a torsion coil spring having expansion and contraction forces in both the torsion direction and the length direction of the coil portion can be obtained.

According to another aspect of the present invention, the second developing portion is pressed against the first developing portion by the expansion and contraction force in the longitudinal direction of the coil portion of the torsion coil spring, so that the concave portion is provided on one of the developing portions and the other is provided on the other. The convex portion fits at a predetermined deployment angle, and the predetermined deployment angle is maintained.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view of the torsion coil spring and the hinge structure with the torsion coil spring according to the present invention at the time of development, and FIG. 2 is a front view of the torsion coil spring and the hinge structure at the time of development. In FIG. 2, the torsion coil spring should be originally indicated by a broken line, but is indicated by a solid line for easy viewing.

Referring to these drawings, the structure of the torsion coil spring will be described first. The torsion coil spring 1 has a coil portion 2 formed by an interval winding wound at a constant interval L.
And L-shaped knobs 3 and 4 at both ends of the coil 2.

Accordingly, the torsion coil spring 1 is provided with a stretching force P3 in the longitudinal direction of the coil portion 2 together with a stretching force P3 in the torsional direction.
Will have.

Next, a hinge structure using the torsion coil spring 1 will be described. The hinge structure 10 with a torsion coil spring includes a first expanded portion 11 having a U-shaped cross section, a second expanded portion 12 having a U-shaped cross section fitted inside the first expanded portion 11, and opening and closing the two expanded portions 11, 12. A connecting pin 13 to be freely connected, a torsion coil spring 1 mounted on the connecting pin 13, a plate 14 sandwiched between the torsion coil spring 1 and the second developing portion 12, and E fixed to both ends of the connecting pin 13. It consists of rings 15 and 16.

The first developing unit 11 and the second developing unit 12 have both the developing units 11, 1 in the developed state (the state shown in FIG. 1).
2, through holes 17 and 18 are provided, and the projections 19 provided on the plate 14 are fitted into the through holes 17 and 18. As a result, the first developing unit 11 and the second developing unit 12 are fixed at a predetermined developing angle.

FIG. 3 is a perspective view of the hinge structure with a torsion coil spring according to the present invention when it is developed. In FIG. 3, the torsion coil spring is omitted for easy understanding of the state.

Next, the operation of the hinge structure with a torsion coil spring will be described. 4 is a plan view of the hinge structure with a torsion coil spring when closed, FIG. 5 is a side view of the hinge structure when closed, FIG. 6 is a front view of the hinge structure when closed, and FIG. 7 is the hinge structure. It is a perspective view at the time of closing. In FIGS. 4 and 6, the torsion coil spring should be originally indicated by a broken line as in FIG. 2, but is indicated by a solid line for easy understanding. In FIG. 7, the torsion coil spring is omitted as in FIG.

First, a description will be given of a state in which both the developing units 11 and 12 are closed. The closed appearance is as shown in FIG.

At this time, referring to FIG. 4, the convex portion 19 of the plate 14 is fitted in the through hole 18 of the second developing portion 12, but is fitted in the through hole 17 of the first developing portion 11. I haven't.
This is because the two through holes 17 and 18 are positioned so as to be present at different positions in a state where both the developing portions 11 and 12 are closed.

At this time, the plate 14 and the second developing portion 12
Is pressed against the first developing unit 11 by a longitudinal expansion / contraction force P4 of the torsion coil spring 1, so that the second developing unit 1
2 is rotated, the convex portion 19 of the plate 14 and the second developing portion 1
The fitting state of the second through hole 18 is maintained.

Next, with one of the developing parts 11 and 12 fixed, the other is developed to a predetermined angle. FIGS. 1 to 3 are views developed to this predetermined angle.

Referring to FIG. 1, when the developing portions 11 and 12 are developed to a predetermined angle, the positions of the through holes 17 of the first developing portion 11 and the through holes 18 of the second developing portion 12 coincide with each other. The convex portion 19 is fitted with the through hole 17 of the first developed portion 11 through the through hole 18 of the second developed portion 12.

The projection 19 of the plate 14 is
Of the torsion coil spring 1 in the longitudinal direction is obtained by the force required to fit the through hole 17.

Thus, the first developing section 11 and the second developing section 12 are fixed at a predetermined developing angle.

Therefore, by changing the positions of the through holes 17 and 18, the development angle between the first development part 11 and the second development part 12 can be arbitrarily changed.

Next, when closing the first deploying portion 11 and the second deploying portion 12, the knobs 3, 4 of the torsion coil spring 1 are pressed in a direction to reduce the interval between the coils 2. Then, since the convex portion 19 of the plate 14 is pulled out from the through hole 17 of the first developing portion 11, the first developing portion 11 and the second developing portion 12 can be rotated. Thereby, the first developing unit 11
And the second developing unit 12 can be closed.

By the way, although not shown, the plate 14 is not used, and one of the first developed portion 11 and the second developed portion 12 has a convex portion.
On the other hand, it is also possible to provide a concave portion to be fitted with the concave portion, so that the convex portion and the concave portion are fitted at a predetermined development angle.

[0032]

According to the present invention, there is provided a torsion coil spring having an expansion / contraction force in the torsion direction. , Two different stretching forces can be obtained with one torsion coil spring. This makes it possible to reduce the number of springs, simplify the structure, and reduce costs.

According to another aspect of the present invention, the first U-shaped cross section is provided.
An unfolding portion, a second unfolding portion having a U-shaped cross section fitted inside the first unfolding portion, a connecting pin connecting the two unfolding portions to be freely opened and closed, and one of the first unfolding portion and the second unfolding portion. The convex portion has a concave portion fitted to the convex portion, and a stopper means for fixing the two developing portions at a predetermined developing angle, and is mounted on the connecting pin, and applies a torsional expansion and contraction force in the developing direction, and By forming the windings at intervals, the second
Since the hinge structure with the torsion coil spring is configured from the torsion coil spring that presses the deployment portion against the first deployment portion, a link as a stopper conventionally required to maintain a predetermined deployment angle, a torsion coil spring, and the like are unnecessary, The first deployed portion and the second deployed portion can be fixed at an arbitrary deployment angle by using the expansion and contraction force in the length direction of the torsion coil spring.

Therefore, the number of parts can be reduced, the structure can be simplified,
It is possible to reduce the cost and arbitrarily select the opening / closing angle.

[Brief description of the drawings]

FIG. 1 is a plan view of a torsion coil spring and a hinge structure with a torsion coil spring according to the present invention at the time of development.

FIG. 2 is a front view when the torsion coil spring and the hinge structure are deployed.

FIG. 3 is a perspective view when the hinge structure with the torsion coil spring is developed.

FIG. 4 is a plan view when the hinge structure with the torsion coil spring is closed.

FIG. 5 is a side view when the hinge structure with the torsion coil spring is closed.

FIG. 6 is a front view of the hinge structure with a torsion coil spring when the hinge structure is closed.

FIG. 7 is a perspective view when the hinge structure with the torsion coil spring is closed.

FIG. 8 is a plan view of a conventional hinge structure with a torsion coil spring (hinge closed state).

FIG. 9 is a plan view of the hinge structure (hinge open state).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Torsion coil spring 2 Coil part 3, 4 knob part 10 Hinge structure with torsion coil spring 11 First development part 12 Second development part 13 Connecting pin 14 Plate 17, 18 Through hole 19 Convex part

Claims (4)

[Claims] 1. A torsion coil spring having an expansion / contraction force in a torsion direction, wherein a coil portion of the torsion coil spring is wound in intervals and has an expansion / contraction force in the length direction of the coil portion. 2. A first development part having a U-shaped cross section, a second development part having a U-shaped cross section fitted inside the first development part, a connecting pin for connecting the two development parts to be freely opened and closed, and A stopper is provided on one of the first deploying portion and the second deploying portion, and a recessed portion is fitted on the other of the first deploying portion and the second deploying portion. A torsion coil spring for applying an expansion / contraction force in the direction and winding the coil portion at intervals, thereby pressing the second developing portion against the first developing portion with the coil portion. . 3. The stopper according to claim 2, wherein the stopper is provided with a through-hole in the first deployed portion and the second deployed portion, the through-hole penetrating the two deployed portions when the two deployed portions are at a predetermined deployment angle. And a torsion coil spring, a plate forming a part of the second developing portion is sandwiched, and a convex portion provided on this plate is means for fitting to the through hole when both developing portions have a predetermined developing angle. The hinge structure with a torsion coil spring according to claim 2, wherein: 4. The hinge structure with a torsion coil spring according to claim 2, wherein a knob for applying a force in a direction to reduce the interval between the coils is provided at at least one end of the torsion coil spring.