JPH02296Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an opening/closing mechanism, and more particularly to an opening/closing mechanism including at least two opening/closing members made of permanent magnets that engage to differentiate opening/closing angles.

The opening/closing mechanism used in conventional binders and the like simply opens and closes two opening/closing members using spring force in an on/off manner, and has limited applications. Moreover, these members can only take two positions, fully closed or fully open, which is often inconvenient in use.

The present invention has been made to improve the problems of the prior art, and includes an opening/closing member having at least two magnetic poles of different polarities, and both members have uneven portions on their respective attracting and opposing surfaces. is formed, and when one or both of the members is rotated, these uneven portions engage and separate from each other to differentiate the opening/closing angle between the two members.

The present invention will be explained below with reference to the embodiments shown in the drawings. In Figs. 1 and 2, 1 and 2 are magnetized to different polarities (N or S pole) with cross sections having the same radius and symmetrical sector shapes. The opening/closing member has semicircular uneven portions 4 to 7 on the suction surfaces 1a and 2a of the husband.
is formed. Reference numeral 3 denotes a member to be opened and closed, which is fixed on the opening and closing member 1, for example.

When both opening/closing members are closed, the concavo-convex portions 4 and 5 of their suction surfaces are engaged with each other, as shown in FIG. 1, for example, and when both members are rotated to open, as shown in FIG. As shown, the uneven portions 4 and 5 are separated, and the uneven portions 6 and 7 are engaged.

Therefore, the opening/closing angle between both members can be classified according to the number of concavo-convex portions to be engaged and separated.

In the above embodiment, as is clear from the drawings, there is only one type of opening/closing angle.

The embodiment shown in Fig. 3 is the same as the embodiment described above, with uneven parts 8 and 9 added, and the state a in the figure is closed, b in the figure is slightly open, and c in the figure is in the state when it is largely open. represents. Therefore, in this embodiment, the opening/closing angle can be divided into two types.

Incidentally, the above-mentioned uneven portions are not limited to semicircular shapes as in the above-described embodiments, but may be rectangular uneven portions 4' to 7', as shown in FIG. 4, for example.

5 and 6 show other embodiments of the present invention. In the figure, reference numerals 11 to 14 designate plate members provided on the front and rear surfaces of the opening/closing members 1 and 2, respectively, in order to make it difficult for the corresponding uneven portions of the members to disengage when the opening/closing members 1 and 2 are closed or opened. The plate member has almost the same shape as the opening/closing member, and is adapted to rotate integrally with the opening/closing member, as shown in FIG. 5 in the closed state and as shown in FIG. 6 in the open state. Become.

7 and 8 show still another embodiment of the present invention. In Fig. 7, 15 and 16 are metal rings with one end attached to the opening/closing members 1 and 2, respectively, and the other end is opened/closed by the above member, and can be used as a holder for paper, etc. .

In the embodiment shown in FIG. 8, comparatively long opening/closing members 1 and 2 are used, and one ends of two sets of metal rings 17 to 20 are attached to two predetermined positions of each member so that they can be used as a binder. There is.

As is clear from the above explanation, the present invention has a relatively simple structure, can divide the opening/closing angle into desired types, and can stably maintain the angle.

It should be noted that the opening/closing device of the present invention is of course not limited to the embodiments described above, and for example, the opening/closing member and the shape of its uneven portion may be of any shape as long as the object of the present invention can be achieved. For example, as shown in FIG. 9, one of the opening/closing members 2 may be formed in a straight line.

[Brief explanation of the drawing]

Figures 1a, b, and c and Figures 2a, b, and c respectively show a plan view, front view, and bottom view of one embodiment of the present invention, and Figures 3a, b, and c respectively show an embodiment of the present invention. FIGS. 4a and 4b are front views showing still other embodiments of the present invention, and FIGS. A plan view, a front view, a bottom view, and FIGS. 7 to 9 showing still other embodiments of
The figures show still other embodiments of the present invention. 1, 2...Opening/closing member, 3... Member to be opened/closed, 4~
7...Uneven portion.

Claims (1)

[Claims for Utility Model Registration] (1) An opening/closing member having at least two magnetic poles of different polarities, both members having uneven portions formed on their respective attracting and opposing surfaces, An opening/closing mechanism characterized in that the concave and convex portions engage and separate from each other when both members rotate, thereby dividing the opening/closing angle between both members. (2) The opening/closing mechanism according to claim 1, wherein the member has a cross section that is symmetrical and has the same radius. (3) The opening/closing mechanism according to claim 1, wherein one of the opening/closing members is formed in a straight line.