JP2009062691A - Hinge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hinge capable of maintaining an angle of rotation. <P>SOLUTION: This hinge 100 comprises first and second wing members 110 and 120, and a rotating shaft 113 for rotatably connecting the first and second wing members 110 and 120 together. Frictional protrusions 124, 125 and 126 are formed on the second wing member 120, and frictional grooves 114, 115 and 116 are formed in the first wing member 110. When the first wing member 110 is rotated on the rotating shaft 113 with respect to the second wing member 120, the frictional protrusion 124 abuts on the side wall surfaces 114L and 114R of the frictional groove 114; the frictional protrusion 125 abuts on the side wall surfaces 115L and 115R of the frictional groove 115; and the frictional protrusion 126 abuts on the side wall surfaces 116L and 116R of the frictional groove 116. Thus, frictional forces are generated between the frictional protrusion 124 and the frictional groove 114, between the frictional protrusion 125 and the frictional groove 115, and between the frictional protrusion 126 and the frictional groove 116, respectively. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a hinge that rotatably connects two articles.
More specifically, the present invention relates to a structure for holding a hinge at a predetermined rotation angle.

Conventionally, many office machines used in offices such as copying machines, facsimile machines, and scanners are provided with a document reading section (contact glass) on the upper surface of the main body and a document crimping plate that covers the document reading section. .
The document crimping plate is used for bringing the document placed on the document reading unit into close contact with the document reading unit and holding the position of the document with respect to the document reading unit. It is rotatably connected to the end of the upper surface of the main body of the device.

Such a document pressing plate requires a certain amount of weight in order to bring the document into close contact with the document reading unit. In addition, when an automatic document feeder is provided on the original pressure plate, the weight of the original pressure plate further increases.
Therefore, the conventional hinge for connecting the main body of the office equipment and the original pressure plate has a spring interposed between the mounting member fixed to the main body of the office equipment and the support member fixed to the original pressure plate. By supporting the weight of the document crimping plate with the urging force of the spring, the rotation angle (opening / closing angle) of the document crimping plate with respect to the main body of the office equipment is held at an arbitrary angle, and the operator rotates the document crimping plate (as a result) The operation of placing the document on the document reading unit is facilitated. For example, as described in Patent Document 1.

  Also known is a hinge that facilitates the rotation (opening / closing) of the document crimping plate by rotating the support member fixed to the document crimping plate with respect to the mounting member fixed to the main body of the office equipment by a motor drive. ing. For example, as described in Patent Document 2.

A hinge connecting a main body of a conventional office machine and a document crimping plate needs to have sufficient strength to support the document crimping plate having a certain weight. Further, in order to hold the rotation angle (opening / closing angle) of the original cover with respect to the main body of the office equipment at an arbitrary angle, a large number of complicated parts are required in addition to the spring.
Therefore, the hinge for connecting the main body of the conventional office equipment and the original pressure plate has a large number of parts and the cost of each part is increased, and the manufacturing cost of the hinge is increased.

On the other hand, in the case of a home scanner that is connected to a commercially available personal computer or the like, it is assumed that the document read by the scanner is thinner than that of office equipment used in the office, and the scanner is provided with a hinge. It is possible to set the weight of the attached document pressing plate to be small accordingly.
In addition, home scanners are cheaper than office equipment used in the office and are smaller in overall size.
Therefore, in the case of home scanners and the like, there is a tendency that importance is attached to reducing the manufacturing cost by reducing the number of parts of the hinge that rotatably connects the main body and the original pressing plate, and downsizing the hinge. Therefore, there is a problem that it is difficult to directly apply a hinge used for office equipment used in a conventional office to a home scanner or the like.

  As other examples of hinges having a structure that can be held at a predetermined rotation angle (opening / closing angle), those described in Patent Documents 3 to 7 are known.

  The hinge described in Patent Document 3 forms a square hole, which is a polygonal hole concentric with the rotation shaft, in a part of the sleeve of the two wing members constituting the hinge, and the square hole of the two wing members The angle of rotation of the two wing members is maintained by inserting a square shaft that is a square member having the same cross-sectional shape as the square hole so as to straddle both.

  In the hinge described in Patent Document 4, a concave portion is formed on the end surface of the sleeve of one wing member of the two wing members constituting the hinge, and the rotation shaft penetrates the center of the sleeve of the other wing member. Forming a first hole to be mounted, forming a second hole parallel to the first hole at a position deviated from the center of the sleeve, accommodating a winding spring in the second hole, and A ball is provided at the opening of the hole, and the ball is urged toward the end face of the sleeve of one wing member by a winding spring, and the ball is fitted into a recess formed on the end face of the sleeve of one wing member. By doing so, the rotation angle of the two wing members is maintained.

  In the hinge described in Patent Document 5, a concave portion is formed on the outer peripheral surface of the sleeve of one wing member of the two wing members constituting the hinge, and the outer peripheral surface of the sleeve of one wing member is formed on the other wing member. A ball biased by a winding spring is provided, and the rotation angle of the two wing members is maintained by fitting the ball into the recess.

  In the hinge described in Patent Document 6, a concave portion is formed on the outer peripheral surface of the sleeve of one wing member of the two wing members constituting the hinge, and a plate-like member that can be elastically deformed is provided on the other wing member. The rotation angle of the two wing members is maintained by fitting the front end of the plate-like member into the recess.

  The hinge described in Patent Document 7 is an elastically deformed member in which a convex portion is formed on the outer peripheral surface of the sleeve of one wing member of the two wing members constituting the hinge, and a concave portion is formed on the other wing member. A plate-like member to be obtained is provided, and the convex portions are fitted into the concave portions to hold the rotation angles of the two wing members.

However, the hinges described in Patent Document 3 to Patent Document 5 all have a function of maintaining the rotation angle of two wing members such as a winding spring, a ball, and a member for guiding the expansion / contraction direction of the winding spring. In addition, the number of parts added to the hinge is large, and it is difficult to reduce the manufacturing cost.
Moreover, since the hinge of patent document 6 presupposes using a metal material as a material which comprises a hinge, metal materials contact in the contact part of the plate-shaped member and recessed part by rotation of a hinge. In other words, there is a problem that wear is likely to occur at the contact portion.
Furthermore, since the hinge described in Patent Document 7 is based on the premise that a resin material is used as a material constituting the hinge, in the engagement portion between the convex portion formed by rotation of the hinge and the concave portion formed in the plate-like member. There is a problem that breakage and wear are likely to occur.
JP 2007-212910 A JP 2006-85134 A JP 2001-3629 A Japanese Utility Model Publication No.7-1250 Japanese Utility Model Publication No. 57-32474 Japanese Utility Model Publication No. 47-34456 Japanese Utility Model Publication No. 62-174420

  In view of the above situation, the present invention provides a hinge capable of maintaining a rotation angle (opening / closing angle).

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

That is, in claim 1,
A first wing member;
A second wing member;
A rotating shaft that rotatably connects the first wing member and the second wing member;
Comprising
Friction protrusions are formed on one of the first wing member or the second wing member,
A friction groove is formed on the other of the first wing member or the second wing member,
When the first wing member rotates about the rotation axis with respect to the second wing member, the friction protrusion comes into contact with a side wall surface of the friction groove, whereby the friction protrusion and the friction groove A frictional force is generated between the two.

In claim 2,
The friction protrusion protrudes in a direction perpendicular to the axial direction of a rotation shaft that rotatably connects the first wing member and the second wing member,
A side wall surface of the friction groove extends in a direction perpendicular to an axial direction of a rotation shaft that rotatably connects the first wing member and the second wing member.

In claim 3,
The first wing member and the second wing member are made of a resin material,
The axial width of the rotating shaft in the friction projection is larger than the axial width of the rotating shaft in the friction groove.

In claim 4,
The first wing member and the second wing member are made of a resin material,
A friction member made of a metal material is attached to the friction protrusion,
When the first wing member rotates about the rotation axis with respect to the second wing member, the friction member abuts against a side wall surface of the friction groove.

In claim 5,
The friction member has a protruding curved surface, and the curved surface of the friction member abuts against a side wall surface of the friction groove.

In claim 6,
The pivot shaft is fixed to the first wing member via a bracket;
The second wing member is formed with a sleeve for pivotally supporting the pivot shaft,
The friction protrusion is formed on the outer peripheral surface of the sleeve of the second wing member;
The friction groove is formed in a portion of the first wing member that faces the rotating shaft.

In claim 7,
The pivot shaft is fixed to the first wing member via a bracket;
The second wing member is formed with a sleeve for pivotally supporting the pivot shaft,
The friction protrusion is formed on the outer peripheral surface of the bracket of the first wing member,
The friction groove is formed in a portion of the second wing member that faces the bracket when the rotation shaft is pivotally supported by the sleeve.

In claim 8,
The first wing member is formed with a first sleeve that pivotally supports the pivot shaft,
The second wing member is formed with a second sleeve that pivotally supports the pivot shaft,
The friction protrusion is formed on the outer peripheral surface of the first sleeve of the first wing member,
The friction groove is formed in a portion of the second wing member that faces the first sleeve when the rotation shaft is pivotally supported by the first sleeve and the second sleeve.

In claim 9,
A first wing member;
A second wing member;
A rotating shaft that rotatably connects the first wing member and the second wing member;
Comprising
An elastically deformable arm is formed on one of the first wing member or the second wing member and a fitting convex portion is formed at the tip of the arm,
A fitting recess is formed on the other of the first wing member or the second wing member,
When the first wing member rotates about the rotation axis with respect to the second wing member, the fitting convex portion is urged by the elastic force of the arm to fit into the fitting concave portion. To do.

In claim 10,
The first wing member and the second wing member are made of a resin material,
The fitting projection is obtained by attaching a fitting member made of a metal material to the tip of the arm.

In claim 11,
The fitting member has a protruding curved surface, and the curved surface of the fitting member is fitted into the fitting recess.

In claim 12,
The pivot shaft is fixed to the first wing member via a bracket;
The second wing member is formed with a sleeve for pivotally supporting the pivot shaft,
The fitting recess is formed on the outer peripheral surface of the sleeve of the second wing member,
The arm is formed in a portion of the first wing member that faces the rotating shaft,
The arm urges the fitting convex portion in a direction to contact the outer peripheral surface of the sleeve.

In claim 13,
The pivot shaft is fixed to the first wing member via a bracket;
The second wing member is formed with a sleeve for pivotally supporting the pivot shaft,
The fitting recess is formed on the outer peripheral surface of the bracket of the first wing member,
The arm is formed in a portion facing the bracket in the second wing member when the rotating shaft is pivotally supported by the sleeve,
The arm urges the fitting convex portion in a direction to contact the outer peripheral surface of the bracket.

In claim 14,
The first wing member is formed with a first sleeve that pivotally supports the pivot shaft,
The second wing member is formed with a second sleeve that pivotally supports the pivot shaft,
The fitting recess is formed on the outer peripheral surface of the first sleeve of the first wing member,
The arm is formed in a portion facing the first sleeve in the second wing member when the pivot shaft is pivotally supported by the first sleeve and the second sleeve,
The arm biases the fitting convex portion in a direction to contact the outer peripheral surface of the first sleeve.

In claim 15,
A first wing member;
A second wing member;
A rotating shaft that rotatably connects the first wing member and the second wing member;
Comprising
An elastically deformable arm is formed on one of the first wing member or the second wing member, and an arm-side engagement convex portion is formed on the tip of the arm,
A receiving side engagement convex portion is formed on the other of the first wing member or the second wing member,
When the first wing member rotates about the rotation axis with respect to the second wing member, the arm side engaging convex portion engages with the receiving side engaging convex portion.

  The present invention has an effect that the rotation angle (opening / closing angle) of the first rotation member with respect to the second wing member can be maintained.

Below, the hinge 100 which is the 1st Example of the hinge based on this invention is demonstrated using FIGS. 1-10.
The hinge 100 connects a main body of a scanner for home use connected to a commercially available personal computer or the like and a document pressing plate in a rotatable manner.
Here, the main body of the home scanner corresponds to one of the two articles that are pivotably connected by a hinge, and the document crimping plate of the home scanner is the two articles that are pivotally connected by a hinge. It corresponds to the other.
Note that the present invention is not limited to the use for pivotally connecting the main body of the scanner for home use and the document pressing plate, but can be widely applied to the use for pivotally connecting two articles.

  As shown in FIG. 1, the hinge 100 mainly includes a first wing member 110, a second wing member 120, and balls 134, 135, and 136.

The first wing member 110 is an embodiment of the first wing member according to the present invention, and is a member that is fixed to a document pressing plate of a household scanner.
The first wing member 110 is manufactured by integrally molding polyacetal (POM).

As shown in FIGS. 2 to 5, the body 111 is a main structure of the first wing member 110.
The upper surface of the body 111 is smooth, and when the first wing member 110 is fixed to the document pressing plate of the scanner, the upper surface of the body 111 abuts on the lower surface of the document pressing plate (the surface facing the reading portion of the scanner).
The body 111 is formed with brackets 112L and 112R, a rotating shaft 113, friction grooves 114, 115 and 116, fastening holes 117, and engagement holes 118a and 118b.

  The brackets 112 </ b> L and 112 </ b> R are arranged at a predetermined distance on one end face of the body 111 of the first wing member 110.

The rotating shaft 113 has a shape in which a part of the outer peripheral surface of the cylinder is cut out by two parallel planes, and both ends of the rotating shaft 113 are supported by brackets 112L and 112R, respectively.
Therefore, the rotation shaft 113 is fixed to the body 111 of the first wing member 110 via the brackets 112L and 112R.

The friction grooves 114, 115, and 116 are formed in the body 111 of the first wing member 110 at a predetermined distance from each other in a portion facing the rotation shaft 113 (more precisely, the outer peripheral surface of the rotation shaft 113). It is a groove.
The friction groove 114 has side wall surfaces 114 </ b> L and 114 </ b> R extending in a direction substantially perpendicular to the axial direction of the rotation shaft 113.
Similarly, the friction groove 115 has side wall surfaces 115L and 115R extending in a direction substantially perpendicular to the axial direction of the rotation shaft 113, and the friction groove 116 extends in a direction substantially perpendicular to the axial direction of the rotation shaft 113. It has side wall surfaces 116L and 116R.
Here, “the side wall surface extends in a direction substantially perpendicular to the axial direction of the rotating shaft” is not limited to a pair of planes in which the side wall surface is perpendicular to the axial direction of the rotating shaft. It may be a pair of curved surfaces bulging in a direction approaching each other.

Both the fastening hole 117 and the engagement holes 118a and 118b are holes that penetrate from the upper surface to the lower surface of the body 111 of the first wing member 110.
A pair of protrusions formed on the lower surface of the original document pressure plate of the scanner are engaged with the engagement holes 118a and 118b, respectively, and screws that penetrate through the fastening holes 117 from the lower surface side of the body 111 toward the upper surface side. Similarly, the first wing member 110 is fixed to the original pressure plate by fastening to a screw hole formed on the lower surface of the original pressure plate of the scanner.

The second wing member 120 is an embodiment of the second wing member according to the present invention, and is a member fixed to the main body of a domestic scanner.
The second wing member 120 is made of ABS (acrylonitrile butadiene.
(Styrene) resin is integrally molded.

As shown in FIGS. 6 to 9, the body 121 is a main structure of the second wing member 120.
The body 121 is formed with a sleeve 122, friction projections 124, 125, and 126, and engaging claws 127a, 127b, and 127c.

The sleeve 122 is disposed on one end face of the body 121 of the second wing member 120.
The sleeve 122 has a substantially cylindrical shape, and the sleeve 122 is formed with a through-hole 122a penetrating from one end surface of the sleeve 122 to the other end surface. In addition, the sleeve 122 is formed with a notch groove 122b that connects the outer peripheral surface and the inner peripheral surface (through hole 122a) of the sleeve 122 from one end surface of the sleeve 122 to the other end surface.
By pushing the turning shaft 113 of the first wing member 110 into the through hole 122a from the notch groove 122b, the turning shaft 113 is pivotally supported by the sleeve 122.

The friction protrusions 124, 125, and 126 are protrusions that are formed on the outer peripheral surface of the sleeve 122 at a predetermined interval from each other.
The friction protrusion 124 of this embodiment is a plate-like protrusion that protrudes in a direction perpendicular to the axial direction of the through-hole 122a (and consequently the axial direction of the rotating shaft 113 supported by the sleeve 122). It has a pair of plate surfaces 124L and 124R perpendicular to the axial direction.
The friction protrusion 125 of this embodiment is a plate-like protrusion protruding in a direction perpendicular to the axial direction of the through hole 122a, and has a pair of plate surfaces 125L and 125R perpendicular to the axial direction of the through hole 122a.
The friction protrusion 126 of the present embodiment is a plate-like protrusion protruding in a direction perpendicular to the axial direction of the through hole 122a, and has a pair of plate surfaces 126L and 126R perpendicular to the axial direction of the through hole 122a.

The axial width of the rotation shaft 113 of the friction projection 124 (ie, the distance from the plate surface 124L to the plate surface 124R) is the width of the friction groove 114 in the axial direction of the rotation shaft 113 (ie, the side wall surface 114L to the side wall surface). Greater than 114R).
Similarly, the axial width of the rotation shaft 113 in the friction protrusion 125 (that is, the distance from the plate surface 125L to the plate surface 125R) is the width in the axial direction of the rotation shaft 113 in the friction groove 115 (that is, the side wall surface 115L). The distance in the axial direction of the rotation shaft 113 in the friction projection 126 (that is, the distance from the plate surface 126L to the plate surface 126R) is larger than the distance from the wall surface 115R to the side wall surface 115R. It is larger than the width in the axial direction (that is, the distance from the side wall surface 116L to the side wall surface 116R).

As shown in FIG. 6, the friction protrusion 124 is formed with an octagonal hole 124a having an octagonal cross section extending from the plate surfaces 124L to 124R.
Similarly, the friction protrusion 125 is formed with an octagonal hole 125a having an octagonal cross section extending from the plate surfaces 125L to 125R, and the friction protrusion 126 has an octagonal cross section extending from the plate surfaces 126L to 126R. An octagonal hole 126a is formed.

The engaging claws 127a, 127b, and 127c are formed on the side end surface of the body 121 of the second wing member 120 on the side end surface opposite to the side end surface on which the sleeve 122 is disposed.
By inserting the body 121 of the second wing member 120 into a rectangular engagement hole formed on the upper surface of the main body of the scanner, the engagement claws 127a, 127b and 127c are engaged with the engagement hole, and the second wing member 120 is fixed to the main body of the scanner.

  The balls 134, 135, and 136 are one embodiment of the friction member according to the present invention, and are spherical members made of steel for machine structure.

As shown in FIG. 6, the ball 134 is attached to the friction protrusion 124 by being fitted into an octagonal hole 124 a formed in the friction protrusion 124. Similarly, the ball 135 is attached to the friction projection 125 by being fitted into the octagonal hole 125 a formed in the friction projection 125, and the ball 136 is fitted into the octagonal hole 126 a formed in the friction projection 126. Attached to the friction protrusion 126.
The spherical surface of the ball 134 fitted in the octagonal hole 124 a is in strong contact with the inner wall surface of the octagonal hole 124 a, and the ball 134 does not fall off from the friction protrusion 124. The same applies to the balls 135 and 136.
In this embodiment, the octagonal holes 124a, 124b, and 124c have octagonal cross sections. However, the present invention is not limited to this, and the octagonal holes 124a, 124b, and 124c are formed on the friction protrusions as long as the friction member can be fixed (prevention of falling off). The cross-sectional shape of the hole may be another shape (for example, another polygon such as a hexagon, a circle having a smaller diameter than the friction member, or a star).

  The diameter of the ball 134 is larger than the width in the axial direction of the through hole 122a of the friction projection 124 (and hence the axial direction of the rotating shaft 113 supported by the sleeve 122), that is, the distance from the plate surface 124L to the plate surface 124R. Therefore, as shown in FIGS. 7 and 8, a part of the spherical surface of the ball 134 protrudes from the plate surface 124L and the plate surface 124R in the axial direction of the through hole 122a of the friction projection 124. The same applies to the balls 135 and 136.

As shown in FIG. 10, when the first wing member 110 is rotated upward with respect to the second wing member 120 about the rotation shaft 113, the friction protrusions 124 formed on the second wing member 120 are subjected to friction. The groove 114 is immersed, and the friction protrusion 124 overlaps the friction groove 114 when viewed from the axial direction of the rotation shaft 113.
Similarly, when the first wing member 110 pivots upward with respect to the second wing member 120 about the pivot shaft 113, the friction protrusion 125 is immersed in the friction groove 115, and the axis of the pivot shaft 113 is reached. The friction projection 125 overlaps the friction groove 115 when viewed from the direction, the friction projection 126 is immersed in the friction groove 116, and the friction projection 126 overlaps the friction groove 116 when viewed from the axial direction of the rotation shaft 113. It becomes a state.

  At this time, the axial width of the rotation shaft 113 in the friction projection 124 (that is, the distance from the plate surface 124L to the plate surface 124R) is the width in the axial direction of the rotation shaft 113 in the friction groove 114 (that is, the side wall surface 114L). And the diameter of the ball 134 is larger than the width of the friction projection 124 in the axial direction of the rotation shaft 113, so that the friction projection 124 and the body 111 of the first wing member 110 are The peripheral portions of the friction grooves 114 are elastically deformed in the axial direction of the rotation shaft 113, respectively.

As a result, the spherical surface of the ball 134 and the friction surface 124L of the friction protrusion 124 are in strong contact with the side wall surface 114L of the friction groove 114, and the spherical surface of the ball 134 and the friction surface 124R of the friction protrusion 124 are strong against the side wall surface 114R of the friction groove 114. Abut.
Similarly, the spherical surface of the ball 135 and the friction surface 125L of the friction protrusion 125 are in strong contact with the side wall surface 115L of the friction groove 115, and the spherical surface of the ball 135 and the friction surface 125R of the friction protrusion 125 are strong against the side wall surface 115R of the friction groove 115. Abut.
Similarly, the spherical surface of the ball 136 and the friction surface 126L of the friction protrusion 126 are in strong contact with the side wall surface 116L of the friction groove 116, and the spherical surface of the ball 136 and the friction surface 126R of the friction protrusion 126 are strong against the side wall surface 116R of the friction groove 116. Abut.

  Accordingly, a frictional force is generated between the friction protrusion 124 and the friction groove 114, between the friction protrusion 125 and the friction groove 115, and between the friction protrusion 126 and the friction groove 116, and is applied to the first wing member 120. It becomes resistance of rotation of the wing member 110, and the rotation angle of the first wing member 110 with respect to the second wing member 120 is maintained.

As described above, the hinge 100 is
A first wing member 110;
A second wing member 120;
A rotation shaft 113 (in the case of the present embodiment, the first wing member 110 and the rotation shaft 113 are integrally formed) for rotatably connecting the first wing member 110 and the second wing member 120;
Comprising
Friction protrusions 124, 125, 126 are formed on the second wing member 120,
Friction grooves 114, 115, 116 are formed in the first wing member 110,
When the first wing member 110 rotates about the rotation shaft 113 with respect to the second wing member 120, the friction projection 124 comes into contact with the side wall surfaces 114L and 114R of the friction groove 114, and the friction projection 125 becomes the friction groove. 115, the friction projection 126 abuts against the side wall surfaces 116 L and 116 R of the friction groove 116, so that the friction projection 125 and the friction groove 115 are formed between the friction projection 124 and the friction groove 114. A frictional force is generated between the friction projections 126 and the friction grooves 116.
By configuring in this way, the rotation angle of the first wing member 110 relative to the second wing member 120 can be maintained.
Further, since the number of parts constituting the hinge 100 is small and the structure of each part (each member) is simple, it contributes to a reduction in manufacturing cost.

  The hinge 100 of the present embodiment has a configuration in which three friction protrusions (friction protrusions 124, 125, and 126) and three friction grooves (friction grooves 114, 115, and 116) are formed. The number of friction protrusions and friction grooves formed on the hinge can be appropriately selected according to the magnitude of the frictional force desired to be generated. That is, a configuration in which one friction projection and one friction groove are formed, a configuration in which two friction projections and two friction grooves are formed, or a configuration in which four or more are formed, respectively.

Further, the friction projections 124, 125, 126 of the hinge 100 protrude in a direction perpendicular to the axial direction of the rotation shaft 113, and
The side walls 114L and 114R of the friction groove 114, the side walls 115L and 115R of the friction groove 115, and the side walls 116L and 116R of the friction groove 116 extend in a direction perpendicular to the axial direction of the rotating shaft 113.
With this configuration, when the first wing member 110 is rotated with respect to the second wing member 120, the friction protrusions 124, 125, and 126 are immersed in the friction grooves 114, 115, and 116, respectively. It is possible to generate a friction force between the friction projection 114 and the friction groove 114, between the friction projection 125 and the friction groove 115, and between the friction projection 126 and the friction groove 116.

In addition, the hinge 100 is
The first wing member 110 and the second wing member 120 which are members constituting the hinge 100 are both made of a resin material,
The axial width of the rotating shaft of the friction projection 124 is larger than the axial width of the rotating shaft 113 of the friction groove 114, and the axial width of the rotating shaft of the friction projection 125 is the rotating shaft 113 of the friction groove 115. The axial width of the rotating shaft of the friction projection 126 is larger than the width of the rotating shaft 113 of the friction groove 116 in the axial direction.
With this configuration, when the first wing member 110 rotates with respect to the second wing member 120 and the friction protrusion 124 overlaps the friction groove 114 when viewed from the axial direction of the rotation shaft 113, the friction protrusion 124. The peripheral portion of the friction groove 114 in the body 111 of the first wing member 110 is elastically deformed in the axial direction of the rotation shaft 113, and the friction protrusion 124 strongly contacts the side wall surfaces 114L and 114R of the friction groove 114. It is possible to generate a large frictional force between 124 and the friction groove 114. The same applies to the friction protrusion 125 and the friction protrusion 126.

  How much the axial width of the rotating shaft in the friction projection is larger than the axial width of the rotating shaft in the friction groove depends on the elastic constants of the material constituting the first wing member and the material constituting the second wing member. The coefficient of friction between the material constituting the first wing member and the material constituting the second wing member (and hence the magnitude of the friction force desired to be generated), and the durability of the friction protrusions and friction grooves (wear resistance) It is possible to select appropriately according to, for example.

Although the resin material which comprises the 1st wing member 110 of a present Example is a polyacetal and the resin material which comprises the 2nd wing member 120 is an ABS resin, the resin material which comprises the hinge which concerns on this invention is limited to these Instead, the resin material constituting the first wing member and the second wing member can be appropriately selected according to the magnitude of the frictional force to be generated, the durability of the friction projections and the friction grooves, and the like.
Other examples of the resin material constituting the hinge according to the present invention include polyamide (PA), polycarbonate (PC), modified polyphenylene ether (m-PPE), engineering plastics such as polybutylene terephthalate (PBT), or amorphous. Polyarylate (PAR), polysulfone (PSF), polyethersulfone (PES), polyphenylene sulfide (PPS), polyetheretherketone (PEEK), polyimide (PI), polyetherimide (PEI), fluorine resin, etc. Super engineering plastics.

Further, the first wing member 110 and the second wing member 120 which are members constituting the hinge 100 are made of a resin material,
Balls 134, 135 and 136 made of steel for machine structural use are attached to the friction projections 124, 125 and 126, respectively.
When the first wing member 110 rotates about the rotation shaft 113 with respect to the second wing member 120, the ball 134 contacts the side wall surfaces 114 </ b> L and 114 </ b> R of the friction groove 114, and the ball 135 The balls 136 are in contact with the side wall surfaces 115L and 115R, and the balls 136 are in contact with the side wall surfaces 116L and 116R of the friction groove 116.
With this configuration, the durability (resistance to resistance) at the contact portion between the friction protrusion and the friction groove is more than that when both the friction protrusion and the friction groove (more precisely, the peripheral portion of the friction groove) are made of a resin material. (Abrasion) is improved.
In this embodiment, the friction protrusion and the friction member are both in contact with the side wall surface of the friction groove. However, the present invention is not limited to this, and the friction member is in contact with the side wall surface of the friction groove. Alternatively, the friction protrusion may not contact the side wall surface of the friction groove.

In addition, although the balls 134, 135, and 136 of the present embodiment are made of a machine structural steel, the friction member according to the present invention is not limited to a steel material, and may be made of another metal material.
However, from the viewpoint of maintaining a state where the hinge can be held at an arbitrary rotation angle even when the hinge is repeatedly rotated (from the viewpoint of durability (wear resistance) at the contact portion between the friction protrusion and the friction groove), friction It is desirable to select a material excellent in wear resistance as a material constituting the member.
Examples of metal materials having excellent wear resistance include bearing steel (SUJ1 to SUJ5; JIS G 4805).

Each of the balls 134, 135, and 136 has a spherical surface that is a protruding curved surface, the spherical surface of the ball 134 abuts against the side wall surfaces 114L and 114R of the friction groove 114, and the spherical surface of the ball 135 is the side wall surface 115L of the friction groove 115. Contact with 115R, and the spherical surface of the ball 136 contacts the side wall surfaces 116L and 116R of the friction groove 116.
With this configuration, wear of the balls 134, 135, and 136, the side wall surfaces 114L and 114R of the friction groove 114, the side wall surfaces 115L and 115R of the friction groove 115, and the side wall surfaces 116L and 116R of the friction groove 116 is suppressed. Is possible.
The balls 134, 135, and 136 in this embodiment are spherical in shape, but the shape of the friction member according to the present invention is not limited to this. For example, a metal material formed in a horseshoe shape or a metal plate made of U The same effect can be obtained if a shape having a protruding curved surface such as a bent one is used and the protruding curved surface is in contact with the side wall surface of the friction groove.

In addition, the hinge 100 is
The rotation shaft 113 is fixed to the first wing member 110 via brackets 112L and 112R,
The second wing member 120 is formed with a sleeve 122 that pivotally supports the rotation shaft 113.
Friction protrusions 124, 125, 126 are formed on the outer peripheral surface of sleeve 122 of second wing member 120,
The friction grooves 114, 115, and 116 are formed in portions of the first wing member 110 that face the rotating shaft 113,
When the first wing member 110 rotates about the rotation shaft 113 with respect to the second wing member 120, the friction projection 124 comes into contact with the side wall surfaces 114L and 114R of the friction groove 114, and the friction projection 125 becomes the friction groove. 115, the friction projection 126 abuts against the side wall surfaces 116 L and 116 R of the friction groove 116, so that the friction projection 125 and the friction groove 115 are formed between the friction projection 124 and the friction groove 114. However, the hinge according to the present invention is not limited to this, and the frictional force is generated between the friction projection 126 and the friction groove 116.

That is, like a hinge 200 which is a second embodiment of the hinge according to the present invention shown in FIG.
The rotation shaft 213 is fixed to the first wing member 210 via the brackets 212L and 212R,
The second wing member 220 is formed with a sleeve 222 that pivotally supports the rotation shaft 213.
The friction projection 214 is formed on the outer peripheral surface of the bracket 212L of the first wing member 210,
The friction protrusion 215 is formed on the outer peripheral surface of the bracket 212R of the first wing member 210,
The friction groove 224 is formed in a portion of the second wing member 220 that faces the bracket 212L when the rotation shaft 213 is pivotally supported by the sleeve 222.
The friction groove 225 is formed in a portion of the second wing member 220 that faces the bracket 212R when the rotation shaft 213 is pivotally supported by the sleeve 222.
When the first wing member 210 rotates with respect to the second wing member 220 about the rotation shaft 213, the friction protrusion 214 comes into contact with the side wall surface of the friction groove 224, and the friction protrusion 215 is on the friction groove 225 side. Even if the frictional force is generated between the friction projection 214 and the friction groove 224 and between the friction projection 215 and the friction groove 225 by abutting against the wall surface, the first wing member 210 with respect to the second wing member 220 is not affected. It is possible to maintain the rotation angle.

Further, like a hinge 300 which is a third embodiment of the hinge according to the present invention shown in FIG.
The first wing member 310 is formed with a first sleeve 312 that pivotally supports the rotation shaft 330.
The second wing member 320 is formed with a second sleeve 322 that pivotally supports the rotation shaft 330.
The friction protrusion 314 is formed on the outer peripheral surface of the first sleeve 312 of the first wing member 310,
The friction groove 324 is formed in a portion of the second wing member 320 that faces the first sleeve 312 when the rotation shaft 330 is pivotally supported by the first sleeve 312 and the second sleeve 322.
When the first wing member 310 rotates with respect to the second wing member 320 about the rotation shaft 330, the friction protrusion 314 contacts the side wall surface of the friction groove 324, so that the friction protrusion 314 and the friction groove 324 are brought into contact. Even if a frictional force is generated between the first wing member 310 and the second wing member 320, the rotation angle of the first wing member 310 can be maintained.

Furthermore, like a hinge 300 shown in FIG.
The friction protrusion 325 is formed on the outer peripheral surface of the second sleeve 322 of the second wing member 320,
The friction groove 315 is formed in a portion of the first wing member 310 that faces the second sleeve 322 when the rotation shaft 330 is pivotally supported by the first sleeve 312 and the second sleeve 322.
When the first wing member 310 rotates about the rotation shaft 330 with respect to the second wing member 320, the friction protrusion 325 comes into contact with the side wall surface of the friction groove 315, whereby the friction protrusion 325 and the friction groove 315. Even if a frictional force is generated between the first wing member 310 and the second wing member 320, the rotation angle of the first wing member 310 can be maintained.

As described above, the first wing member, the second wing member, and a rotation shaft that rotatably connects the first wing member and the second wing member,
A friction protrusion is formed on one of the first wing member or the second wing member,
A friction groove is formed on the other of the first wing member or the second wing member,
When the first wing member rotates about the rotation axis with respect to the second wing member, the friction projection comes into contact with the side wall surface of the friction groove, and a frictional force is generated between the friction projection and the friction groove. If it is a structure, it is possible to hold | maintain the rotation angle of the 1st wing member with respect to the 2nd wing member.

  Since both the hinge 100 and the hinge 200 are integrally formed with the first wing member, the number of parts can be reduced more than that of the hinge 300.

Hereinafter, a hinge 400, which is a fourth embodiment of the hinge according to the present invention, will be described with reference to FIGS.
The hinge 400 connects a main body of a scanner for home use connected to a commercially available personal computer or the like and a document pressing plate in a rotatable manner.

  As shown in FIG. 13, the hinge 400 mainly includes a first wing member 410, a second wing member 420, and balls 436a, 436b, 436c, and 436d.

The first wing member 410 is an embodiment of the first wing member according to the present invention, and is a member that is fixed to a document pressing plate of a household scanner.
The first wing member 410 is manufactured by integrally molding polyacetal.

As shown in FIGS. 13 to 17, the body 411 is a main structure of the first wing member 410.
The upper surface of the body 411 is smooth, and when the first wing member 410 is fixed to the document pressing plate of the scanner, the upper surface of the body 411 contacts the lower surface of the document pressing plate (the surface facing the scanner reading unit).
The body 411 includes brackets 412L and 412R, a rotating shaft 413, deformation grooves 414a, 414b, 414c, and 414d, arms 415L, 415M, and 415R, ball mounting portions 416a, 416b, 416c, and 416d, a fastening hole 417, and an engagement hole 418a. -418b is formed.

  The brackets 412L and 412R are arranged at a predetermined distance on one end face of the body 411 of the first wing member 410.

The rotating shaft 413 has a shape in which a part of the outer peripheral surface of the cylinder is cut out by two parallel planes, and both ends of the rotating shaft 413 are supported by brackets 412L and 412R, respectively.
Therefore, the rotation shaft 413 is fixed to the body 411 of the first wing member 410 via the brackets 412L and 412R.

  The deformation grooves 414 a, 414 b, 414 c, and 414 d are spaced apart from each other at a portion of the body 411 of the first wing member 410 that faces the rotation shaft 413 (more precisely, the outer peripheral surface of the rotation shaft 413). It is a groove to be formed.

The arm 415L is a portion sandwiched between the deformation groove 414a and the deformation groove 414b in the body 411 of the first wing member 410.
Similarly, the arm 415M is a portion sandwiched between the deformation groove 414b and the deformation groove 414c in the body 411 of the first wing member 410, and the arm 415R is deformed from the deformation groove 414c in the body 411 of the first wing member 410. It is a portion sandwiched between the grooves 414d.
As shown in FIG. 17, the arm 415 </ b> M has a shape in which a tip portion is bent in an L shape when viewed from the axial direction of the rotation shaft 413. The same applies to the arms 415L and 415R.
The bases of the arms 415L, 415M, and 415R are connected to the body 410, and the other portions are separated from the body 410 and adjacent arms by deformation grooves (deformation grooves 414a, 414b, 414c, and 414d). Therefore, the arms 415L, 415M, and 415R can be elastically deformed with their bases as base points.

The ball mounting portion 416a is a protrusion formed at the tip of the arm 415L that is a portion of the arm 415L that faces the rotation shaft 413 (more strictly, the outer peripheral surface of the rotation shaft 413).
Similarly, the ball attachment portions 416b and 416c are protrusions formed at the tip of the arm 415M that is the portion of the arm 415M that faces the rotation shaft 413, and the ball attachment portion 416d is the rotation shaft 413 of the arm 415R. Is a protrusion formed at the tip of the arm 415R, which is a portion facing the.
The ball attachment portions 416a, 416b, 416c, and 416d are formed with depressions that open toward the rotation shaft 413, respectively.

Both the fastening hole 417 and the engagement holes 418a and 418b are holes that penetrate from the upper surface to the lower surface of the body 411 of the first wing member 410.
A pair of protrusions formed on the lower surface of the original document pressure plate of the scanner are engaged with the engagement holes 418a and 418b, respectively, and screws that penetrate through the fastening holes 417 from the lower surface side of the body 411 toward the upper surface side. Similarly, the first wing member 410 is fixed to the original pressure plate by fastening to a screw hole formed on the lower surface of the original pressure plate of the scanner.

The second wing member 420 is an embodiment of the second wing member according to the present invention, and is a member fixed to the main body of a domestic scanner.
The second wing member 420 is formed by integrally molding an ABS resin.

As shown in FIGS. 18 to 21, the body 421 is a main structure of the second wing member 420.
The body 421 is formed with a sleeve 422, fitting recesses 426L, 426M, and 426R, and engaging claws 427a, 427b, and 427c.

The sleeve 422 is disposed on one end surface of the body 421 of the second wing member 420.
The sleeve 422 has a substantially cylindrical shape, and the sleeve 422 is formed with a through hole 422a penetrating from one end surface of the sleeve 422 to the other end surface. Further, the sleeve 422 is formed with a notch groove 422b that connects the outer peripheral surface and the inner peripheral surface (through hole 422a) of the sleeve 422 from one end surface of the sleeve 422 to the other end surface.
By pushing the rotation shaft 413 of the first wing member 410 into the through hole 422a from the notch groove 422b, the rotation shaft 413 is pivotally supported by the sleeve 422.

  The fitting recesses 426L, 426M, and 426R are recesses (dents) formed on the outer peripheral surface of the sleeve 422 at a predetermined interval.

The engaging claws 427a, 427b, and 427c are formed on the side end surface of the body 421 of the second wing member 420 on the side end surface opposite to the side end surface on which the sleeve 422 is disposed.
By inserting the body 421 of the second wing member 420 into a rectangular engagement hole formed on the upper surface of the scanner main body, the engagement claws 427a, 427b, 427c are engaged with the engagement hole, and the second wing member is engaged. 420 is fixed to the main body of the scanner.

The balls 436a, 436b, 436c, and 436d are one embodiment of the fitting convex portion according to the present invention and one embodiment of the fitting member according to the present invention.
As shown in FIGS. 15, 16, and 17, the balls 436a, 436b, 436c, and 436d are spherical members made of steel for machine structural use, and are respectively formed in the recesses formed in the ball mounting portions 416a, 416b, 416c, and 416d. It is fitted.
The diameter of the ball 436a is larger than the diameter of the opening of the recess formed in the ball mounting portion 416a. When the ball 436a is fitted into a recess formed in the ball mounting portion 416a, the ball mounting portion 416a is elastically deformed so that the inner peripheral surface of the recess of the ball mounting portion 416a strongly contacts the ball 436a, and the ball 436a is in contact with the ball mounting portion 416a. It is firmly fixed (attached).
A part of the spherical surface of the ball 436a protrudes to the outside of the ball mounting portion 416a, and the protruding portion faces the rotation shaft 413.
The same applies to the balls 436b, 436c, and 436d.

When the rotation shaft 413 of the first wing member 410 is pivotally supported by the sleeve 422 of the second wing member 420, the ball 436a is biased in a direction approaching the outer peripheral surface of the sleeve 422 by the elastic force of the arm 415L. It contacts the outer peripheral surface of the sleeve 422.
Similarly, the balls 436b and 436c are urged in a direction approaching the outer peripheral surface of the sleeve 422 by the elastic force of the arm 415M and abut against the outer peripheral surface of the sleeve 422.
Similarly, the ball 436d is urged in the direction approaching the outer peripheral surface of the sleeve 422 by the elastic force of the arm 415R, and comes into contact with the outer peripheral surface of the sleeve 422.

As shown in FIG. 22, when the first wing member 410 is rotated with respect to the second wing member 420, the ball 436 c is biased by the elastic force of the arm 415 </ b> M and is formed on the outer peripheral surface of the sleeve 422. Fits to 426M.
Similarly, the ball 436a is urged by the elastic force of the arm 415L and is fitted into a fitting recess 426L formed on the outer peripheral surface of the sleeve 422, and the ball 436b is urged by the elastic force of the arm 415M. The ball 436d is urged by the elastic force of the arm 415R and is fitted into the fitting recess 426R formed on the outer peripheral surface of the sleeve 422.
The first wing member 410 is rotated with respect to the second wing member 420 from a state in which the balls 436a, balls 436b, 436c, and 436d are fitted in fitting recesses 426L, 426M, and 426R formed on the outer peripheral surface of the sleeve 422. In order to achieve this, the first wing member 410 and the second wing member 410 and the second wing member 410 have a rotational force (moment) that the balls 436a, balls 436b, 436c, and 436d overcome the elastic force of the arms 415L, 415M, and 415R and return to the outer peripheral surface of the sleeve 422. It is necessary to act on the wing member 420.

  As described above, the ball 436a urged by the elastic force of the arm 415L, the balls 436b and 436c urged by the elastic force of the arm 415M, and the 436d urged by the elastic force of the arm 415R are respectively the outer circumferences of the sleeve 422. The first wing member 410 can be held at a predetermined rotation angle with respect to the second wing member 420 by fitting into the fitting recess 426L, the fitting recess 426M, and the fitting recess 426R formed on the surface. Is possible.

As described above, the hinge 400 is
A first wing member 410;
A second wing member 420;
A rotation shaft 413 (in the case of the present embodiment, the first wing member 410 and the rotation shaft 413 are integrally formed) that rotatably connects the first wing member 410 and the second wing member 420;
Comprising
Arms 415L, 415M, and 415R that can be elastically deformed are formed on the first wing member 410, and a ball 436a is formed at the tip of the arm 415L, and balls 436b and 436c are formed at the tip of the arm 415M. A ball 436d is formed at the tip,
The fitting recesses 426L, 426M, and 426R are formed in the second wing member 420,
When the first wing member 410 rotates with respect to the second wing member 420 about the rotation shaft 413, the ball 436a is urged by the elastic force of the arm 415L and is fitted into the fitting recess 426L. 436b and 436c are urged by the elastic force of the arm 415M to fit into the fitting recess 426M, and the ball 436d is urged by the elastic force of the arm 415R to fit into the fitting recess 426R.
With this configuration, the rotation angle of the first wing member 410 relative to the second wing member 420 can be maintained.
Further, since the number of parts constituting the hinge 400 is small and the structure of each part (each member) is simple, it contributes to a reduction in manufacturing cost.

  In the present embodiment, the first wing member 410 has three arms (arms 415L, 415M, and 415R). However, the present invention is not limited to this, and the first wing member or the second wing member is not limited thereto. The number of arms formed depends on the size of the hinge, the material of the first wing member and the second wing member constituting the hinge, and the required braking of the rotation of the first wing member 410 relative to the first wing member 420. It is possible to select appropriately according to the magnitude of power.

The first wing member 410 and the second wing member 420 are both made of a resin material,
The balls 436a, 436b, 436c, and 436d are spherical members made of a metal material.
Attach the ball 436a to the tip of the arm 415L as a fitting member,
The balls 436b and 436c are attached to the tip of the arm 415M as fitting members,
The ball 436d is used as a fitting member and attached to the tip of the arm 415R.
By configuring in this way, the fitting projection and the fitting recess (more precisely, the peripheral portion of the fitting depression) are closer to the fitting projection and the fitting recess than when both are made of a resin material. Durability (wear resistance) at the contact portion is improved.

  The resin material constituting the first wing member 410 of this embodiment is polyacetal, and the resin material constituting the second wing member 420 is ABS resin, but the resin material constituting the hinge according to the present invention is limited to these. However, it is possible to appropriately select the resin material constituting the first wing member and the second wing member according to the durability of the fitting convex portion and the fitting concave portion.

Although the balls 436a, 436b, 436c, and 436d of this embodiment are made of a machine structural steel, the fitting member according to the present invention is not limited to a steel material, and may be made of another metal material. good.
However, from the viewpoint of maintaining a state in which the hinge can be held at an arbitrary rotation angle even when the hinge is repeatedly rotated (from the viewpoint of durability (wear resistance) at the contact portion between the fitting convex portion and the fitting concave portion). It is desirable to select a material excellent in wear resistance as a material constituting the fitting member.
Examples of metal materials having excellent wear resistance include bearing steel (SUJ1 to SUJ5; JIS G 4805).

The balls 436a, 436b, 436c, and 436d have a spherical surface that is a protruding curved surface, the spherical surface of the ball 436a is fitted into the fitting recess 426L, and the spherical surface of the ball 436b and the spherical surface of the ball 436c are in the fitting recess 426M. The spherical surface of the ball 436d is fitted into the fitting recess 426R.
With this configuration, it is possible to suppress wear of the balls 436a, 436b, 436c, and 436d and the fitting recesses 426L, 426M, and 426R.
The balls 436a, 436b, 436c, and 436d in this embodiment are spherical in shape, but the shape of the fitting member according to the present invention is not limited to this. For example, a metal material formed in a horseshoe shape or a metal The same effect can be obtained if a shape having a protruding curved surface such as a U-shaped bent plate is used and the protruding curved surface is fitted in the fitting recess.

The hinge 400 is
The rotation shaft 413 is fixed to the first wing member 410 via the brackets 412L and 412R,
The second wing member 420 is formed with a sleeve 422 that pivotally supports the rotation shaft 413.
The fitting recesses 426L, 426M, and 426R are formed on the outer peripheral surface of the sleeve 422 of the second wing member 420,
The arms 415L, 415M, and 415R are formed in a portion of the first wing member 410 that faces the rotation shaft 413,
The arm 415L urges the ball 436a attached to the tip of the arm 415L in a direction to contact the outer peripheral surface of the sleeve 422,
The arm 415M urges the balls 436b and 436c attached to the tip of the arm 415M in a direction to contact the outer peripheral surface of the sleeve 422,
The arm 415R urges the ball 436d attached to the tip of the arm 415R in a direction to contact the outer peripheral surface of the sleeve 422,
When the first wing member 410 rotates with respect to the second wing member 520 about the rotation shaft 413, the ball 436a is urged by the elastic force of the arm 415L to be fitted into the fitting recess 426L, and the ball 436b and 436c are urged by the elastic force of the arm 415M to fit into the fitting recess 426M, and the ball 436d is urged by the elastic force of the arm 415R to fit into the fitting recess 426R. The hinge according to the invention is not limited to this.

That is, like a hinge 500 which is a fifth embodiment of the hinge according to the present invention shown in FIG.
The rotation shaft 513 is fixed to the first wing member 510 via the brackets 512L and 512R,
The second wing member 520 is formed with a sleeve 522 that pivotally supports the rotation shaft 513.
The fitting recess 516L is formed on the outer peripheral surface of the bracket 512L of the first wing member 510,
The fitting recess 516R is formed on the outer peripheral surface of the bracket 512R of the first wing member 510,
The arm 525L is formed at a portion of the second wing member 520 that faces the bracket 512L when the rotation shaft 513 is pivotally supported by the sleeve 522.
The arm 525R is formed at a portion of the second wing member 520 that faces the bracket 512R when the rotation shaft 513 is pivotally supported by the sleeve 522.
The arm 525L urges the ball 536L in a direction to contact the outer peripheral surface of the bracket 522,
The arm 525R urges the ball 536R in a direction to contact the outer peripheral surface of the bracket 522, and
When the first wing member 510 rotates with respect to the second wing member 520 about the rotation shaft 513, the ball 536L is urged by the elastic force of the arm 525L and is fitted into the fitting recess 516L. Even when 536R is urged by the elastic force of the arm 525R to be fitted into the fitting recess 516R, the rotation angle of the first wing member 510 relative to the second wing member 520 can be maintained.

Moreover, like a hinge 600 which is a sixth embodiment of the hinge according to the present invention shown in FIG.
The first wing member 610 is formed with a first sleeve 612 that pivotally supports the rotation shaft 630.
The second wing member 620 is formed with a second sleeve 622 that pivotally supports the rotation shaft 630.
The fitting recess 616 is formed on the outer peripheral surface of the first sleeve 612 of the first wing member 610,
The arm 625 is formed at a portion of the second wing member 620 that faces the first sleeve 612 when the rotation shaft 630 is pivotally supported by the first sleeve 612 and the second sleeve 622.
The arm 625 urges a ball 636 attached to the tip of the arm 625 to the first sleeve 612,
When the first wing member 610 rotates about the rotation shaft 630 relative to the second wing member 620, the ball 636 is urged by the elastic force of the arm 625 to be fitted into the fitting recess 616. In addition, the rotation angle of the first wing member 610 relative to the second wing member 620 can be maintained.

Furthermore, like a hinge 600 shown in FIG.
The fitting recess 626 is formed on the outer peripheral surface of the second sleeve 622 of the second wing member 620,
The arm 615 is formed at a portion of the first wing member 610 that faces the second sleeve 622 when the rotation shaft 630 is pivotally supported by the first sleeve 612 and the second sleeve 622.
The arm 615 biases the ball 637 attached to the tip of the arm 615 to the second sleeve 622,
When the first wing member 610 rotates about the rotation shaft 630 with respect to the second wing member 620, the ball 637 is urged by the elastic force of the arm 615 to be fitted into the fitting recess 626. In addition, the rotation angle of the first wing member 610 relative to the second wing member 620 can be maintained.

As described above, the first wing member, the second wing member, and a rotation shaft that rotatably connects the first wing member and the second wing member,
An elastically deformable arm is formed on one of the first wing member or the second wing member and a fitting convex portion is formed on the tip of the arm,
A fitting recess is formed on the other of the first wing member or the second wing member,
When the first wing member rotates about the rotation axis with respect to the second wing member, the fitting convex portion is biased by the elastic force of the arm and fitted into the fitting concave portion. It is possible to maintain the rotation angle of the first wing member relative to the second wing member.

  Since both the hinge 400 and the hinge 500 are formed integrally with the first wing member, the number of parts can be reduced as compared with the hinge 600 accordingly.

Below, the hinge 700 which is the 7th Example of the hinge based on this invention using FIG. 25 is demonstrated.
The hinge 700 rotatably connects a main body of a scanner for home use which is connected to a commercially available personal computer or the like and a document pressing plate.

As shown in FIG. 25, the hinge 700 is
A first wing member 710;
A second wing member 720;
A pivot shaft 730 that pivotably connects the first wing member 710 and the second wing member 720;
Comprising
Arms 714L and 714R that can be elastically deformed are formed on the first wing member 710, and arm-side engagement convex portions 715L and 715R that are protrusions are formed at the tip portions of the arms 714L and 714R, respectively.
The second wing member 720 is formed with receiving-side engagement convex portions 725L and 725R (more specifically, on the outer peripheral surface of the bracket 722 at the second wing member 720 at a position facing the tip portion of the arms 714L and 714R). And
When the first wing member 710 rotates with respect to the second wing member 720 about the rotation shaft 730, the arm side engagement convex portions 715L and 715R engage with the receiving side engagement convex portions 725L and 725R, respectively. To do.
With this configuration, the arm 714L and 714R can overcome the elastic force of the arm 714L and 714R so long as the arm-side engagement projections 715L and 715R are not given a rotational force to get over the receiving-side engagement projections 725L and 725R. The side engagement convex portions 715L and 715R are held in a state of being engaged with the receiving side engagement convex portions 725L and 725R, respectively, and thus the rotation angle of the first wing member 710 with respect to the second wing member 720 is maintained.

In the hinge 700, the first wing member 710 is formed with the arms 714L and 714R. However, the present invention is not limited to this.
That is,
A first wing member, a second wing member, and a rotation shaft that rotatably connects the first wing member and the second wing member,
An elastically deformable arm is formed on the second wing member and an arm-side convex portion is formed at the tip of the arm,
A receiving side convex portion is formed at a position facing the arm side convex portion in the first wing member,
Even when the first wing member rotates with respect to the second wing member around the rotation axis, the arm side engaging convex portion engages with the receiving side engaging convex portion. It is possible to maintain the rotation angle of the first wing member relative to the second wing member.

The perspective view which shows the 1st Example of the hinge which concerns on this invention. The perspective view which shows the 1st wing member of the 1st Example of the hinge which concerns on this invention. The top view which shows the 1st wing member of the 1st Example of the hinge which concerns on this invention. The bottom view which shows the 1st wing member of the 1st Example of the hinge which concerns on this invention. The AA side surface sectional view showing the 1st wing member of the 1st example of the hinge concerning the present invention. The perspective view which shows the 2nd wing member of the 1st Example of the hinge which concerns on this invention. The top view which shows the 2nd wing member of the 1st Example of the hinge which concerns on this invention. The bottom view which shows the 2nd wing member of the 1st Example of the hinge which concerns on this invention. The side view which shows the 2nd wing member of the 1st Example of the hinge which concerns on this invention. The side surface partial sectional view which shows the 1st Example of the hinge which concerns on this invention. The figure which shows the 2nd Example of the hinge which concerns on this invention. The figure which shows the 3rd Example of the hinge which concerns on this invention. The perspective view which shows 4th Example of the hinge based on this invention. The perspective view which shows the 1st wing member of 4th Example of the hinge based on this invention. The top view which shows the 1st wing member of 4th Example of the hinge which concerns on this invention. The bottom view which shows the 1st wing member of 4th Example of the hinge which concerns on this invention. BB side sectional drawing which shows the 1st wing member of 4th Example of the hinge which concerns on this invention. The perspective view which shows the 2nd wing member of 4th Example of the hinge which concerns on this invention. The top view which shows the 2nd wing member of 4th Example of the hinge which concerns on this invention. The bottom view which shows the 2nd wing member of 4th Example of the hinge which concerns on this invention. The side view which shows the 2nd wing member of 4th Example of the hinge which concerns on this invention. Sectional perspective view which shows the 4th Example of the hinge which concerns on this invention. The figure which shows the 5th Example of the hinge which concerns on this invention. The figure which shows the 6th Example of the hinge which concerns on this invention. The figure which shows the 7th Example of the hinge which concerns on this invention.

Explanation of symbols

100 Hinge (first embodiment)
110 First wing member 113 Rotating shaft 114/115/116 Friction groove 120 Second wing member 124/125/126 Friction protrusion

Claims (15)

A first wing member;
A second wing member;
A rotating shaft that rotatably connects the first wing member and the second wing member;
Comprising
Friction protrusions are formed on one of the first wing member or the second wing member,
A friction groove is formed on the other of the first wing member or the second wing member,
When the first wing member rotates about the rotation axis with respect to the second wing member, the friction protrusion comes into contact with a side wall surface of the friction groove, whereby the friction protrusion and the friction groove A hinge that generates friction between the two. The friction protrusion protrudes in a direction perpendicular to the axial direction of a rotation shaft that rotatably connects the first wing member and the second wing member,
2. The hinge according to claim 1, wherein a side wall surface of the friction groove extends in a direction perpendicular to an axial direction of a rotation shaft that rotatably connects the first wing member and the second wing member. The first wing member and the second wing member are made of a resin material,
The hinge according to claim 1 or 2, wherein a width in the axial direction of the rotation shaft in the friction protrusion is larger than a width in the axial direction of the rotation shaft in the friction groove. The first wing member and the second wing member are made of a resin material,
A friction member made of a metal material is attached to the friction protrusion,
The friction member abuts against a side wall surface of the friction groove when the first wing member rotates about the rotation axis with respect to the second wing member. The hinge according to claim 1.   The hinge according to claim 4, wherein the friction member has a protruding curved surface, and the curved surface of the friction member abuts against a side wall surface of the friction groove. The pivot shaft is fixed to the first wing member via a bracket;
The second wing member is formed with a sleeve for pivotally supporting the pivot shaft,
The friction protrusion is formed on the outer peripheral surface of the sleeve of the second wing member;
The hinge according to any one of claims 1 to 5, wherein the friction groove is formed in a portion of the first wing member facing the rotating shaft. The pivot shaft is fixed to the first wing member via a bracket;
The second wing member is formed with a sleeve for pivotally supporting the pivot shaft,
The friction protrusion is formed on the outer peripheral surface of the bracket of the first wing member,
The said friction groove | channel is formed in the part which opposes the said bracket in a said 2nd wing member when the said rotating shaft is pivotally supported by the said sleeve. Hinge. The first wing member is formed with a first sleeve that pivotally supports the pivot shaft,
The second wing member is formed with a second sleeve that pivotally supports the pivot shaft,
The friction protrusion is formed on the outer peripheral surface of the first sleeve of the first wing member,
6. The friction groove is formed in a portion of the second wing member that faces the first sleeve when the rotation shaft is pivotally supported by the first sleeve and the second sleeve. The hinge according to any one of the above. A first wing member;
A second wing member;
A rotating shaft that rotatably connects the first wing member and the second wing member;
Comprising
An elastically deformable arm is formed on one of the first wing member or the second wing member and a fitting convex portion is formed at the tip of the arm,
A fitting recess is formed on the other of the first wing member or the second wing member,
When the first wing member rotates about the rotation axis with respect to the second wing member, the fitting convex portion is urged by the elastic force of the arm to fit into the fitting concave portion. To hinge. The first wing member and the second wing member are made of a resin material,
The hinge according to claim 9, wherein the fitting convex portion is formed by attaching a fitting member made of a metal material to a tip portion of the arm.   The hinge according to claim 10, wherein the fitting member has a protruding curved surface, and the curved surface of the fitting member is fitted into the fitting recess. The pivot shaft is fixed to the first wing member via a bracket;
The second wing member is formed with a sleeve for pivotally supporting the pivot shaft,
The fitting recess is formed on the outer peripheral surface of the sleeve of the second wing member,
The arm is formed in a portion of the first wing member that faces the rotating shaft,
The hinge according to any one of claims 9 to 11, wherein the arm urges the fitting convex portion in a direction in contact with an outer peripheral surface of the sleeve. The pivot shaft is fixed to the first wing member via a bracket;
The second wing member is formed with a sleeve for pivotally supporting the pivot shaft,
The fitting recess is formed on the outer peripheral surface of the bracket of the first wing member,
The arm is formed in a portion facing the bracket in the second wing member when the rotating shaft is pivotally supported by the sleeve,
The hinge according to any one of claims 9 to 11, wherein the arm urges the fitting convex portion in a direction in contact with an outer peripheral surface of the bracket. The first wing member is formed with a first sleeve that pivotally supports the pivot shaft,
The second wing member is formed with a second sleeve that pivotally supports the pivot shaft,
The fitting recess is formed on the outer peripheral surface of the first sleeve of the first wing member,
The arm is formed in a portion facing the first sleeve in the second wing member when the pivot shaft is pivotally supported by the first sleeve and the second sleeve,
The hinge according to any one of claims 9 to 11, wherein the arm urges the fitting convex portion in a direction in contact with an outer peripheral surface of the first sleeve. A first wing member;
A second wing member;
A rotating shaft that rotatably connects the first wing member and the second wing member;
Comprising
An elastically deformable arm is formed on one of the first wing member or the second wing member, and an arm-side engagement convex portion is formed at the tip of the arm,
A receiving side engagement convex portion is formed on the other of the first wing member or the second wing member,
A hinge that engages the arm-side engaging convex portion with the receiving-side engaging convex portion when the first wing member rotates relative to the second wing member about the rotational axis.

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