JPH0622067A - Hinge device - Google Patents

Abstract

PURPOSE:To easily fit a rotary support shaft in a circular hole provided at a notch and to make it hardly detachable. CONSTITUTION:A member 5 turnably connected to a rotary support shaft 7 provided with flat surfaces 7a at both ends is provided with a notch 6 equipped with a circular hole 6b for rotatably supporting the rotary support shaft 7 and a guide groove 6a for communicating the circular hole 6b with the outside. Then, the rotary support shaft 7 is easily inserted by widening the outer edges of the guide groove 6a, and the rotary support shaft 7 is hardly detached by making the deep side of the guide groove 6a narrower than the thickness A of the rotary support shaft 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge device for rotatably connecting one member to another member, and more particularly,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge device suitable for use in an OA device such as a facsimile machine or a copying machine, so that the opening / closing part is rotatably connected to the main body.

[0002]

2. Description of the Related Art Conventionally, in a hinge device, a circular hole is formed in each of two members to be connected, a common pin is inserted into the circular hole, and the two members are rotated using the pin. It was possible to connect (for example, JP-A-63-23).
No. 021, JP-A-2-209585, and Jiukai Sho 62-9.
664 publication). However, this configuration has a problem that the number of parts is large and the cost is high.

Therefore, it is known that one member is provided with a shaft, the other member is formed with a hole into which the shaft is inserted, and the shaft is inserted and held in the hole so as to be rotatable. (For example, Actual Kaihei 61
-145660 gazette). But with this configuration,
The shaft had to be moved in the axial direction and inserted into the hole, which restricted the place of use.

A shaft having a circular cross section is attached to one member, a substantially U-shaped groove into which the shaft is inserted is provided in the other member, and the shaft is inserted into the groove so that the member can be rotated. It is also known (for example, the actual Kaihei 3-1068
19). However, in this case, there is a drawback in that the shaft easily comes off the groove.

Therefore, as shown in FIG. 5, one member 1
Is formed with a notch 2 consisting of a parallel guide groove 2a and a circular hole 2b continuing to the inside thereof, and the other member (not shown) has a rotary spindle 3 having a shape in which both side surfaces of a cylinder are cut in parallel. There is known a hinge device in which the member 1 is rotatable around the rotary support shaft 3 by attaching the rotary support shaft 3 and inserting the rotary support shaft 3 into the circular hole 2b of the notch 2. Here, the diameter R of the cylindrical portion of the rotary support shaft 3 is set to be slightly smaller than the inner diameter R'of the circular hole 2b, and the thickness between the parallel flat surfaces 3a on both sides of the rotary support shaft 3 is set. A is the width A ′ of the guide groove 2a
It is set slightly smaller than. In assembling this hinge device, as shown in FIG. 6 (a), the guide groove 2a is positioned parallel to the plane 3a of the rotary support shaft 3 and, in that state, as shown in (b) and (c). Then, by moving the member 1 in the direction of the rotation support shaft 3, the rotation support shaft 3
Was inserted into the circular hole 2b through the guide groove 2a, and then the member 1 was rotated to the position shown in (d) and used in that state. In this state, the plane 3a of the rotation support shaft 3 is inclined with respect to the guide groove 2a, so that the rotation support shaft 3 does not come out through the guide groove 2a, and the member 1 does not move the rotation support shaft 3 It is possible to rotate stably around the center.

[0006]

However, according to this structure, when the rotary support shaft 3 is fitted into the notch 2, the structure shown in FIG.
As shown in FIG.
If a is not positioned in parallel, it will not fit and will not fit easily. During operation, the plane 3 of the rotary support shaft 3
There is also a problem that when a is parallel to the guide groove 2a of the notch 2, it may be easily displaced.

The present invention has been made in view of the above-mentioned problems, and it is possible to easily fit the rotation support shaft into the notch, and after the fitting, the rotation support shaft is easily disengaged. It is an object of the present invention to provide a hinge device that does not have a hinge.

[0008]

In order to solve the above-mentioned problems, the present invention has a notch into which a rotary support shaft having a shape in which both side surfaces of a cylinder are cut in parallel is inserted into the notch as it goes inward from the outer end side. A guide groove having a narrow width and a circular hole which is formed in the back of the guide groove to rotatably insert the rotation spindle are formed. Further, the width (B) of the narrowest portion of the guide groove is formed on both sides of the rotation spindle. And the width (C) of the widest part of the guide groove is smaller than the thickness (A) between the flat surfaces formed on both sides of the rotary support shaft. It is equipped with a structure to make it larger.

[0009]

According to the present invention, when the rotary spindle is fitted into the notch, the flat surfaces on both sides of the rotary spindle are substantially parallel to the central axis of the guide groove at the tip of the notch so that the rotary spindle is rotated. Just push the support shaft into the guide groove. At this time, since the outer end of the guide groove is wide, the rotation spindle can be easily inserted. Further, although the inner side of the guide groove is narrow, the rotary shaft pushes and spreads both sides of the guide groove to advance, so that it fits in the circular hole without any trouble. After the rotation support shaft extends into the guide groove and completely enters the circular hole, the guide groove is elastically restored to its original state, preventing the rotation support shaft from coming off. In this state, the rotation operation as the hinge is performed.

[0010]

1 shows a hinge device according to an embodiment of the present invention, (a) is a schematic plan view thereof, and (b) is a schematic perspective view thereof. In FIG. 1, reference numeral 5 is one member constituting the hinge device, and a notch 6 is formed at one end thereof. The notch 6 has a guide groove 6a whose width becomes narrower from the outer end side toward the inner side, and a circular hole 6b formed in the back. Reference numeral 7 denotes a rotating column that cooperates with the member 5 to form a hinge device, and is attached to an appropriate member (not shown). The rotary column 7 has a shape in which both side surfaces of a cylinder are cut in parallel, and has flat surfaces 7a parallel to both sides. Here, the inner diameter R'of the circular hole 6b
Is set to be slightly larger than the diameter R of the rotary column 7 so that the rotary column 7 can be smoothly rotated without rattling when the rotary column 7 is inserted into the circular hole 6b.
Further, the width B of the narrowest portion on the inner side of the guide groove 6a is set to be smaller than the thickness A between the flat surfaces 7a formed in parallel on both sides of the rotary support shaft 7 and the guide groove 6a. The width C of the widest portion at the outer end of is set to be larger than the thickness A between the flat surfaces 7a of the rotation support shaft 7. Member 5 forming notch 6
Is made of a material capable of elastically deforming the portions on both sides of the notch 6 when the rotary strut 7 is fitted, for example, resin. On the other hand, the rotary support shaft 7 is made of a rigid material such as metal.

In assembling the hinge device having the above construction, as shown in FIG. 2A, the central axis of the guide groove 6a is positioned substantially parallel to the plane 7a of the rotary support shaft 7,
In this state, the member 5 is moved in the direction of the rotation support shaft 7 as shown in (b). As a result, the rotary support shaft 7 enters the guide groove 6a, and as shown in (c), the support shaft 7 enters while expanding the portions on both sides thereof. Here, since the width C (see FIG. 1) of the outer end of the guide groove 6a is large, the rotary support shaft 7 can be easily pushed into the guide groove 6a.
The rotary shaft 7 passes through the guide groove 6a, and the circular hole 6
When completely fitted in b, as shown in (d), the parts on both sides of the guide groove 6a are restored to their original state by their elasticity. As a result, the width B of the narrowest portion at the inner side of the guide groove 6a becomes smaller than the thickness A between the flat surfaces 7a of the rotation support shaft 7, and the rotation support shaft 7 is prevented from coming off. After that, as shown in (e), the member 5 rotates about the rotation support shaft 7 to perform a hinge operation. Here, even when the flat surface 7a of the rotation support shaft 7 becomes parallel to the central axis of the guide groove 6a when the member 5 is rotated [see FIG. 2 (d)], As described above, since the width B of the narrowest part of the guide groove 6a is smaller than the thickness A between the flat surfaces 7a of the rotary support shaft 7, the rotary support shaft 7 will not come off.

The place of use of the hinge device having the above construction is not particularly limited, but one example thereof is shown in FIGS. 3 and 4. In FIGS. 3 and 4, reference numeral 10 denotes a main body of the facsimile apparatus, and the main body 10 has a rotary support shaft 7 attached thereto. Reference numeral 11 denotes an opening / closing portion, and a member 5 having a notch 6 is provided at the rear end position of the opening / closing portion 11. By fitting the rotation support shaft 7 into the notch 6, the opening / closing part 11 can be rotatably attached to the main body 10.

In the above embodiment, the rotary support shaft 7 is fixed at a fixed position, and the member 5 having the notch 6 is formed on the rotary support shaft 7.
Although the configuration of rotating with respect to the above is described, the present invention is not limited to this case, and the member 5 having the notch 6 is fixed in a fixed position,
It goes without saying that the member to which the rotary support shaft 7 is attached may be configured to rotate.

[0014]

As is apparent from the above description, according to the present invention, the width becomes narrower from the outer end side toward the inner side in the notch into which the rotary support shaft having the shape obtained by cutting both side surfaces of the cylinder in parallel is inserted. And a circular hole that is formed in the inner side of the guide groove so as to rotatably insert the rotation support shaft, and the width (B) of the narrowest part of the guide groove is parallel to both sides of the rotation support shaft. It is said that the width (C) is made smaller than the thickness (A) between the formed flat surfaces, and the width (C) of the widest portion of the guide groove is made larger than the thickness (A) between the flat surfaces on both sides of the rotary support shaft. Because it was configured,
It is easy to fit the rotation support shaft into the guide groove with a wide outer end, and the work of attaching the rotation support shaft to the circular hole becomes easy. Moreover, when the rotation support shaft has entered the circular hole, the guide groove Is restored to its original state by elasticity and becomes narrower than the thickness of the rotation support shaft, so the rotation support shaft comes off through the guide groove regardless of the angular position of the rotation support shaft. It has the effect that a stable hinge operation is always possible.

[Brief description of drawings]

1A is a schematic plan view of a hinge device according to an embodiment of the present invention, and FIG. 1B is a schematic perspective view thereof.

2 (a), (b), (c), (d) and (e) are schematic plan views for explaining the assembling procedure in the above embodiment.

FIG. 3 is a schematic perspective view showing a facsimile machine using the hinge device of the above embodiment, with an opening / closing part removed.

FIG. 4 is a schematic perspective view showing the facsimile apparatus with an opening / closing section opened.

5A is a schematic plan view of a conventional hinge device, and FIG. 5B is a schematic perspective view thereof.

6 (a), (b), (c) and (d) are schematic plan views for explaining the assembling procedure in the conventional example.

[Explanation of symbols]

 5 member 6 notch 6a guide groove 6b circular hole 7 rotation spindle 7a plane

Claims (1)

[Claims] 1. A rotary spindle having a shape in which both side surfaces of a cylinder are cut in parallel, and a member having a cutout into which the rotary spindle is inserted, the cutout extending inward from the outer end side. The guide groove has a width that narrows as it goes along with a circular hole that is formed in the inner side of the guide groove so that the rotation spindle can be rotatably inserted therein. Smaller than the thickness (A) between the planes formed parallel to each other, and the width (C) of the widest part of the guide groove is larger than the thickness (A) between the planes on both sides of the rotation support shaft. A hinge device characterized by being defined.