JP2011220379A - Hinge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge which can generate turning regulating force when a turning angle is within a prescribed range and generating no turning regulating force when a turning angle is out of the prescribed range.SOLUTION: The hinge 100L includes a ceiling side fixing member 110; a monitor side fixing member 120; a cylindrical member 130 having an inner peripheral surface 132 having an escape groove 135 formed therein and fixed to the ceiling side fixing member 110; and a shaft member 140 which has an outer peripheral surface 142 partitioned in a first abutment surface 142a, a first separation surface 142c, a second abutment surface 142b and a second separation surface 142d and one end part of which is fixed to the monitor side fixing member 120 and the other end of which is pivotally supported by the ceiling side fixing member 110 to be turnable. The cylindrical member 130 is not elastically deformed when the first abutment surface 142a is opposed to the escape groove 135 and the cylindrical member 130 is elastically deformed to be expanded in the radial direction of the cylindrical member 130 when the first abutment surface 142a is opposed to the inner peripheral surface 132.

Description

  The present invention relates to a hinge that rotatably connects one of two objects (first connection object) to the other (second connection object).

  Conventionally, a first wing member fixed to one of the two objects (first connection object), a second wing member fixed to the other of the two objects (second connection object), and the first There is known a hinge that includes a pivot shaft that is pivotally supported on one or both of the wing member and the second wing member, and that pivotally connects the other to one of two objects. ing.

Further, when a rotational force of a predetermined magnitude or more is applied, the second wing member is allowed to rotate with respect to the first wing member. When a rotational force of a predetermined magnitude is applied, the first wing member is allowed to rotate. There is also known a hinge in which the rotation of the second wing member relative to the second wing member is restricted (the rotation angle of the second wing member relative to the first wing member is maintained).
For example, it is like the hinge described in Patent Document 1 and Patent Document 2.

A hinge (tilt hinge) described in Patent Document 1 includes a holder (corresponding to a first wing member), a shaft (corresponding to a combination of a second wing member and a rotating shaft), and a wave washer (corrugated spring washer). Elastic means are provided.
The elastic means is fitted on the shaft and abuts on the holder and the shaft.

In the case of the hinge described in Patent Document 1, the elastic means is placed between the holder and the shaft by an urging force generated by the elastic means in the axial direction of the shaft (the force by which the elastic means that is elastically deformed returns to its original shape). Friction force is generated through.
And when the rotational force which only overcomes the said frictional force acts on the hinge of patent document 1, a shaft rotates with respect to a holder.

The hinge (tilt hinge) described in Patent Document 2 includes a first attachment member (corresponding to a first wing member) in which a first friction torque generation hole is formed, and a second in which a second friction torque generation hole is formed. Mounting member (corresponding to the second wing member) and a spring pin (corresponding to a rotating shaft) which is a pin manufactured by rolling a metal plate into a cylindrical shape.
One end of the spring pin is press-fitted into a first friction torque generating hole formed in the first mounting member, and the other end of the spring pin generates a second friction torque formed in the second mounting member. Press fit into the hole.

In the case of the hinge described in Patent Document 2, the first mounting member and the second mounting member are urged by the urging force generated by the spring pin in the radial direction of the spring pin (the force by which the elastically deformed spring pin returns to its original shape). A frictional force is generated between the mounting member and the mounting member via a spring pin.
And when the rotational force which overcomes the said frictional force acts on the hinge of patent document 2, a 2nd attachment member rotates with respect to a 1st attachment member.

However, the hinges described in Patent Document 1 and Patent Document 2 always have the first wing member regardless of the rotation angle of the second wing member with respect to the first wing member (even if the rotation angle changes). A frictional force is generated between the second wing member and the second wing member.
Therefore, when the rotation angle of the second wing member with respect to the first wing member is within a predetermined range, a frictional force between the first wing member and the second wing member (second wing member with respect to the first wing member). Force), and when the rotation angle of the second wing member with respect to the first wing member is outside a predetermined range, a frictional force is generated between the first wing member and the second wing member. Cannot be used for applications such as

When the rotation angle of the second wing member relative to the first wing member is a predetermined value, the rotation of the second wing member relative to the first wing member is restricted, and the rotation angle of the second wing member relative to the first wing member is A hinge is also known in which the rotation of the second wing member relative to the first wing member is not restricted when it is not a predetermined value.
For example, as described in Patent Document 3.

A hinge (hinge device) described in Patent Document 3 includes a fixed member (corresponding to a first wing member), a fixed cam member (corresponding to a second wing member), a shaft (corresponding to a rotating shaft), a sliding cam member, It has a compression spring.
The fixing member is fixed to one end of the shaft so as not to rotate relative to the shaft and to move in the axial direction of the shaft. The fixed cam member is pivotally supported at the other end of the shaft so as to be relatively rotatable and immovable in the axial direction of the shaft. The sliding cam member is inserted so as not to rotate relative to the shaft and to be movable (slidable) in the axial direction of the shaft. The compression spring is inserted into the shaft, and one end thereof is in contact with the fixed member and the other end is in contact with the sliding cam member.
The sliding cam member is pressed against the fixed cam member by the urging force of the compression spring (the force that the compression spring elastically deformed in the contracting direction tries to return to its original shape). Two concave portions are formed on the surface of the fixed cam member facing the sliding cam member, and two convex portions are formed on the surface of the sliding cam member facing the fixed cam member.
The hinge described in Patent Document 3 has a fixed cam member with respect to the fixed member at a predetermined rotation angle, that is, when the two convex portions of the sliding cam member are fitted into the two concave portions of the fixed cam member. The rotation is restricted.

  However, in the case of the hinge described in Patent Document 3, the rotation angle that can restrict the rotation of the fixed cam member relative to the fixed member is a pinpoint (for example, when the rotation angle is 0 ° or 180 °). The rotation angle that can restrict the rotation of the fixed cam member with respect to the fixed member does not have a “range (width)”.

JP 2004-138129 A JP 2000-66762 A Japanese Patent Laid-Open No. 11-112630

The present invention has been made in view of the above situation.
That is, the problem to be solved by the present invention is when the rotation angle of the second wing member (or second connection object) with respect to the first wing member (or first connection object) is within a predetermined range. Can generate a rotation restricting force (a force that restricts the rotation of the second wing member relative to the first wing member), and the rotation angle of the second wing member relative to the first wing member is outside a predetermined range. And providing a hinge capable of preventing the rotation restricting force from being generated.

  Hereinafter, means for solving the above problems will be described.

That is, in claim 1,
A hinge for pivotally connecting the second connection object to the first connection object,
A first wing member fixed to the first connection object;
A second wing member fixed to the second connection object;
A cylindrical member having an inner peripheral surface and fixed to the first wing member;
A shaft member having an outer peripheral surface, one end fixed to the second wing member, the other end pivotally supported by the first wing member, and housed in the cylindrical member;
Comprising
The axial direction of the cylindrical member and the axial direction of the shaft member are parallel to each other,
An escape groove is formed on the inner peripheral surface of the cylindrical member,
The outer peripheral surface of the shaft member is sequentially divided into a first contact surface, a first separation surface, a second contact surface, and a second separation surface in the circumferential direction of the shaft member,
A radius of a circumscribed circle in contact with the first abutting surface and the second abutting surface is larger than a distance from the first separated surface to the center of the circumscribed circle, and the center of the circumscribed circle from the second separated surface Greater than the distance to and greater than the radius of the inner peripheral surface of the cylindrical member,
The width of the first contact surface in the circumferential direction of the shaft member is smaller than the width of the escape groove in the circumferential direction of the cylindrical member,
When the first contact surface is opposed to the escape groove, the cylindrical member is not elastically deformed by accommodating a portion of the shaft member corresponding to the first contact surface in the escape groove,
When the first contact surface is opposed to the inner peripheral surface of the cylindrical member, the first contact surface and the second contact surface are in contact with the inner peripheral surface of the cylindrical member, whereby the cylindrical member is A portion that is elastically deformed so as to be spread in the radial direction of the cylindrical member, the first contact surface and the inner peripheral surface of the cylindrical member abut, the second contact surface, and the inner peripheral surface of the cylindrical member A frictional force is generated at the portion where the abuts.

In claim 2,
An engagement recess is formed in the first wing member,
The same number of engaging convex portions as the engaging concave portions are formed at one end of the cylindrical member,
When the engaging convex portion engages with the engaging concave portion, the cylindrical member is fixed to the first wing member so as not to be relatively rotatable around the axis of the cylindrical member.

In claim 3,
A hinge for pivotally connecting the second connection object to the first connection object,
A second wing member fixed to the second connection object;
A cylindrical member having an inner peripheral surface and fixed to the first connection object;
A shaft member having an outer peripheral surface, one end fixed to the second wing member, the other end pivotally supported by the first connection object, and housed in the cylindrical member;
Comprising
The axial direction of the cylindrical member and the axial direction of the shaft member are parallel to each other,
An escape groove is formed on the inner peripheral surface of the cylindrical member,
The outer peripheral surface of the shaft member is sequentially divided into a first contact surface, a first separation surface, a second contact surface, and a second separation surface in the circumferential direction of the shaft member,
A radius of a circumscribed circle in contact with the first abutting surface and the second abutting surface is larger than a distance from the first separated surface to the center of the circumscribed circle, and the center of the circumscribed circle from the second separated surface Greater than the distance to and greater than the radius of the inner peripheral surface of the cylindrical member,
The width of the first contact surface in the circumferential direction of the shaft member is smaller than the width of the escape groove in the circumferential direction of the cylindrical member,
When the first contact surface is opposed to the escape groove, the cylindrical member is not elastically deformed by accommodating a portion of the shaft member corresponding to the first contact surface in the escape groove,
When the first contact surface is opposed to the inner peripheral surface of the cylindrical member, the first contact surface and the second contact surface are in contact with the inner peripheral surface of the cylindrical member, whereby the cylindrical member is A portion that is elastically deformed so as to be spread in the radial direction of the cylindrical member, the first contact surface and the inner peripheral surface of the cylindrical member abut, the second contact surface, and the inner peripheral surface of the cylindrical member A frictional force is generated at the portion where the abuts.

In claim 4,
An engagement recess is formed in the first connection object,
The same number of engaging convex portions as the engaging concave portions are formed at one end of the cylindrical member,
When the engaging convex part engages with the engaging concave part, the cylindrical member is fixed to the first connection object so as not to be relatively rotatable around the axis of the cylindrical member.

In claim 5,
A hinge for pivotally connecting the second connection object to the first connection object,
A first wing member fixed to the first connection object;
A cylindrical member having an inner peripheral surface and fixed to the first wing member;
A shaft member having an outer peripheral surface, one end fixed to the second connection object, the other end pivotally supported by the first wing member, and housed in the cylindrical member;
Comprising
The axial direction of the cylindrical member and the axial direction of the shaft member are parallel to each other,
An escape groove is formed on the inner peripheral surface of the cylindrical member,
The outer peripheral surface of the shaft member is sequentially divided into a first contact surface, a first separation surface, a second contact surface, and a second separation surface in the circumferential direction of the shaft member,
A radius of a circumscribed circle in contact with the first abutting surface and the second abutting surface is larger than a distance from the first separated surface to the center of the circumscribed circle, and the center of the circumscribed circle from the second separated surface Greater than the distance to and greater than the radius of the inner peripheral surface of the cylindrical member,
The width of the first contact surface in the circumferential direction of the shaft member is smaller than the width of the escape groove in the circumferential direction of the cylindrical member,
When the first contact surface is opposed to the escape groove, the cylindrical member is not elastically deformed by accommodating a portion of the shaft member corresponding to the first contact surface in the escape groove,
When the first contact surface is opposed to the inner peripheral surface of the cylindrical member, the first contact surface and the second contact surface are in contact with the inner peripheral surface of the cylindrical member, whereby the cylindrical member is A portion that is elastically deformed so as to be spread in the radial direction of the cylindrical member, the first contact surface and the inner peripheral surface of the cylindrical member abut, the second contact surface, and the inner peripheral surface of the cylindrical member A frictional force is generated at the portion where the abuts.

In claim 6,
An engagement recess is formed in the first wing member,
The same number of engaging convex portions as the engaging concave portions are formed at one end of the cylindrical member,
When the engaging convex portion engages with the engaging concave portion, the cylindrical member is fixed to the first wing member so as not to be relatively rotatable around the axis of the cylindrical member.

In claim 7,
A hinge for pivotally connecting the second connection object to the first connection object,
A cylindrical member having an inner peripheral surface and fixed to the first connection object;
A shaft member having an outer peripheral surface, one end fixed to the second connection object, the other end pivotally supported by the first connection object, and housed in the cylindrical member;
Comprising
The axial direction of the cylindrical member and the axial direction of the shaft member are parallel to each other,
An escape groove is formed on the inner peripheral surface of the cylindrical member,
The outer peripheral surface of the shaft member is divided into a first contact surface, a first separation surface, a second contact surface, and a second separation surface in the circumferential direction of the shaft member,
A radius of a circumscribed circle in contact with the first abutting surface and the second abutting surface is larger than a distance from the first separated surface to the center of the circumscribed circle, and the center of the circumscribed circle from the second separated surface Greater than the distance to and greater than the radius of the inner peripheral surface of the cylindrical member,
The width of the first contact surface in the circumferential direction of the shaft member is smaller than the width of the escape groove in the circumferential direction of the cylindrical member,
When the first contact surface is opposed to the escape groove, the cylindrical member is not elastically deformed by accommodating a portion of the shaft member corresponding to the first contact surface in the escape groove,
When the first contact surface is opposed to the inner peripheral surface of the cylindrical member, the first contact surface and the second contact surface are in contact with the inner peripheral surface of the cylindrical member, whereby the cylindrical member is A portion that is elastically deformed so as to be spread in the radial direction of the cylindrical member, the first contact surface and the inner peripheral surface of the cylindrical member abut, the second contact surface, and the inner peripheral surface of the cylindrical member A frictional force is generated at the portion where the abuts.

In claim 8,
An engagement recess is formed in the first connection object,
The engaging projection is formed at one end of the cylindrical member,
When the engaging convex part engages with the engaging concave part, the cylindrical member is fixed to the first connection object so as not to be relatively rotatable around the axis of the cylindrical member.

  The present invention generates a rotation restricting force when the rotation angle of the second wing member (or second connection object) with respect to the first wing member (or first connection object) is within a predetermined range. It is possible, and when the rotation angle of the second wing member with respect to the first wing member is outside the predetermined range, it is possible to prevent the rotation restricting force from being generated.

The perspective view which shows the monitor rotatably supported by the ceiling board of a vehicle by one Embodiment of the hinge which concerns on this invention when (theta) = 0 degree. The perspective view which shows the monitor rotatably supported by the ceiling board of a vehicle by one Embodiment of the hinge which concerns on this invention when (theta) = 20 degrees. The perspective view which shows the monitor rotatably supported by the ceiling board of a vehicle by one Embodiment of the hinge which concerns on this invention when (theta) = 180 degrees. (A) Left side view showing a monitor that is pivotally supported on a ceiling plate of a vehicle according to an embodiment of the hinge according to the present invention when θ = 0 °, and (b) When θ = 20 °. The left view which shows the monitor rotatably supported by the ceiling board of a vehicle by one Embodiment of the hinge based on this invention, (c) One Embodiment of the hinge concerning this invention when (theta) = 180 degrees The left view which shows the monitor supported by the ceiling board of a vehicle so that rotation is possible. The perspective view which shows one Embodiment of the hinge which concerns on this invention. The perspective view which similarly shows one Embodiment of the hinge which concerns on this invention. The perspective view which shows the 1st wing member in one Embodiment of the hinge which concerns on this invention. The perspective view which shows the 2nd wing member in one Embodiment of the hinge which concerns on this invention. The perspective view which shows the cylindrical member in one Embodiment of the hinge which concerns on this invention. The perspective view which shows the shaft member in one Embodiment of the hinge which concerns on this invention. The left side sectional view showing the body part of the shaft member in one embodiment of the hinge concerning the present invention. (A) Left side sectional view showing a cylindrical member and a shaft member in an embodiment of the hinge according to the present invention when θ = 0 °, (b) Implementation of the hinge according to the present invention when θ = 20 ° The left side sectional view showing the cylindrical member and shaft member in one form, (c) The left side sectional view showing the cylindrical member and shaft member in one embodiment of the hinge concerning the present invention when theta = 180 degrees. (A) The figure which shows the width | variety L1 of the 1st contact surface in the circumferential direction of the shaft member in the embodiment of the hinge which concerns on this invention, and the width L2 of the 2nd contact surface, (b) of the hinge which concerns on this invention The figure which shows the width | variety L3 of the escape groove | channel in the circumferential direction of the cylindrical member in one Embodiment. The left side sectional view showing another embodiment of the shaft member of the hinge concerning the present invention. (A) Left side sectional view showing another embodiment of the cylindrical member of the hinge according to the present invention, (b) Left side sectional view showing another embodiment of the cylindrical member of the hinge according to the present invention. The perspective view which shows another embodiment of the cylindrical member of the hinge which concerns on this invention.

  Below, the monitor unit 2 attached to the ceiling board 1 is demonstrated using FIGS. 1-4.

  The ceiling board 1 is one embodiment of the first connection object according to the present invention, and is a member that forms the ceiling of a boarding space of a car (a space formed in the car and accommodating a passenger).

The monitor unit 2 is used by a passenger of a car to view an image.
The monitor unit 2 is attached to a portion of the lower surface of the ceiling board 1 that is located in front of the rear seat provided in the boarding space of the automobile.
The monitor unit 2 includes a ceiling side cover 3, a monitor 4, and hinges 100L and 100R.

The ceiling-side cover 3 is a hollow member made of a resin material (a member in which a space is formed), and is fixed to the ceiling plate 1.
As shown in FIGS. 1 to 3, the ceiling-side cover 3 has a shape in which a “left side wall”, a “right side wall”, and a “rear wall” are sequentially connected.
The “left wall portion” is a portion that forms the left side portion of the ceiling side cover 3, and the shape thereof is a rectangular parallelepiped extending substantially in the front-rear direction.
The “right wall portion” is a portion constituting the right side portion of the ceiling side cover 3, and the shape thereof is a rectangular parallelepiped extending in the front-rear direction. The “right side wall” is arranged on the right side of the left side wall with a predetermined interval.
The “rear wall portion” is a portion constituting the rear portion of the ceiling side cover 3, and the shape thereof is a rectangular parallelepiped extending substantially in the left-right direction. The left end of the “rear wall” is connected to the rear end of the left wall, and the right end of the “rear wall” is connected to the rear end of the right wall.

A locking member 3a is formed at the left and right central portion of the lower surface of the rear wall portion of the ceiling-side cover 3.
The locking member 3a includes a push button portion that protrudes downward from the left and right center portion of the lower surface of the rear wall portion, and a projection portion that continues to the push button portion.

When the passenger sitting on the rear seat of the automobile having the ceiling board 1 is not pushing the push button portion of the locking member 3a upward (when the passenger is not touching the locking member 3a), the protrusion of the locking member 3a The portion protrudes forward from the front surface of the rear wall portion of the ceiling side cover 3.
When the passenger sitting on the rear seat of the automobile having the ceiling plate 1 pushes the push button portion of the locking member 3 a upward, the protrusion of the locking member 3 a is more than the front surface of the rear wall portion of the ceiling side cover 3. It moves (retreats) to a position that becomes the rear, and is accommodated in the internal space of the rear wall portion of the ceiling side cover 3.

The monitor 4 is an embodiment of the second connection object according to the present invention.
As shown in FIG. 3, the monitor 4 includes a monitor body 5 and a monitor cover 6.

  The monitor main body 5 displays an image. The monitor main body 5 of the present embodiment is a liquid crystal display, and its outer shape is a substantially thin rectangular parallelepiped having a pair of wide surfaces and four end surfaces. One wide surface of the pair of wide surfaces of the monitor body 5 forms an image display surface (surface for displaying an image).

The monitor cover 6 is a hollow member made of a resin material and covers (accommodates) the monitor body 5.
The shape of the monitor cover 6 is a substantially thin rectangular parallelepiped having a pair of wide surfaces and four end surfaces, and an opening 6 a is formed on one wide surface of the monitor cover 6.
When the monitor body 5 is accommodated in the monitor cover 6, the image display surface of the monitor body 5 is arranged at a position corresponding to the opening 6a. That is, the image display surface of the monitor main body 5 can be viewed from the outside of the monitor cover 6 through the opening 6a.
Further, as shown in FIG. 2, a locking hole 6 b is formed in the left and right central part of the rear end face of the monitor cover 6.

Below, hinge 100L * 100R which is one Embodiment of the hinge based on this invention is demonstrated using FIGS. 1-13.
As shown in FIGS. 1 to 4, the hinges 100 </ b> L and 100 </ b> R connect the monitor 4 to the ceiling plate 1 so as to be rotatable.
More specifically, the hinge 100L connects the left front end of the monitor 4 to the ceiling plate 1 so as to be rotatable, and the hinge 100R connects the right front end of the monitor 4 to the ceiling plate 1 so as to be rotatable.

  Hereinafter, for the sake of convenience, when the monitor 4 is closed (in this embodiment, the monitor 4 is disposed in a portion surrounded by the “left wall portion”, “right wall portion”, and “rear wall portion” of the ceiling side cover 3, The “rotation angle θ of the monitor 4 with respect to the ceiling panel 1” when the image display surface of the main body 5 faces upward (opposite the lower surface of the ceiling panel 1) is set to “0 °”. The rotation angle θ is defined so that the rotation angle θ increases (the rotation angle θ becomes positive) when it rotates in the opening direction (when the monitor 4 rotates clockwise in the left side view). (See FIGS. 1 to 4).

  In addition, since the shape of the hinges 100L and 100R of the present embodiment is bilaterally symmetric, the hinge 100L will be described in detail below, and the detailed description of the hinge 100R will be omitted.

  In the following, for convenience, the vertical direction, the front-rear direction, and the horizontal direction of the automobile having the ceiling plate 1 when the monitor 4 is closed (when θ = 0 °) are used as a reference (the ceiling plate 1 when the monitor 4 is closed). The vertical direction, the front-rear direction, and the left-right direction of the automobile having the above-mentioned are respectively corresponded to the vertical direction, front-rear direction, and left-right direction of the hinge 100L), and the shape of each member constituting the hinge 100L will be described.

  As shown in FIGS. 5 and 6, the hinge 100 </ b> L includes a ceiling side fixing member 110, a monitor side fixing member 120, a cylindrical member 130, a shaft member 140, and an E ring 150.

A ceiling-side fixing member 110 shown in FIG. 7 is an embodiment of the first wing member according to the present invention. The ceiling side fixing member 110 of the present embodiment is manufactured by appropriately bending a single metal plate.
The ceiling side fixing member 110 includes a horizontal plate 111 and an upper plate 116.

The horizontal plate 111 is a plate-like member that forms the upper and lower central portions and the lower portion of the ceiling side fixing member 110.
The horizontal plate 111 has a pair of left and right plate surfaces.

  A shaft support hole 112 is formed in the horizontal plate 111. The shaft support hole 112 penetrates a pair of left and right plate surfaces of the horizontal plate 111.

Two engaging holes 113 and 114 are formed in the horizontal plate 111. The two engagement holes 113 and 114 penetrate a pair of left and right plate surfaces of the horizontal plate 111.
Each of the two engagement holes 113 and 114 is an arc-shaped long hole centered on the shaft support hole 112 in a side view (viewed from the direction through which the shaft support hole 112 passes). The engagement hole 113 is disposed on the front upper side of the shaft support hole 112, and the engagement hole 114 is disposed on the rear upper side of the shaft support hole 112.
The distance from the engagement hole 113 to the shaft support hole 112 and the distance from the engagement hole 114 to the shaft support hole 112 are the same.
The two engagement holes 113 and 114 are one embodiment of the engagement recess according to the present invention.

The upper plate 116 is a plate-like member that forms the upper part of the ceiling side fixing member 110. The upper plate 116 has a pair of upper and lower plate surfaces.
The right end portion of the upper plate 116 continues to the upper end portion of the horizontal plate 111 (the horizontal plate 111 and the upper plate 116 are formed by bending a single metal plate at a right angle at a predetermined fold).

  Two through holes 117 and 118 are formed in the upper plate 116. The through holes 117 penetrate a pair of upper and lower plate surfaces of the upper plate 116 in the front half of the upper plate 116. The through hole 118 passes through a pair of upper and lower plate surfaces of the upper plate 116 in the latter half of the upper plate 116.

In the present embodiment, the ceiling side fixing member 110 is accommodated in the left side wall portion of the ceiling side cover 3.
Further, two screws (not shown) are respectively inserted into the two through holes 117 and 118, and are inserted into two through holes (not shown) formed on the upper surface of the left side wall portion of the ceiling side cover 3, The ceiling side fixing member 110 and the ceiling side cover 3 are fixed to the ceiling board 1 by being screwed into two screw holes formed in the ceiling board 1.

A monitor side fixing member 120 shown in FIG. 8 is an embodiment of the second wing member according to the present invention. The monitor side fixing member 120 of this embodiment is manufactured by appropriately bending a single metal plate.
The monitor side fixing member 120 includes a horizontal plate 121 and a lower plate 126.

  The horizontal plate 121 is a plate-like member that forms an upper portion and a vertical center portion of the monitor-side fixing member 120. The horizontal plate 121 has a pair of left and right plate surfaces. The side view shape of the horizontal plate 121 is a rectangle that is long in the front-rear direction.

  A fixing hole 122 is formed in the horizontal plate 121. The fixing hole 122 penetrates the pair of left and right plate surfaces of the horizontal plate 121 at the front end portion of the horizontal plate 121. The fixing hole 122 has a shape in which a pair of arcs and a pair of parallel straight lines are alternately connected in a side view.

  Three through holes 123, 124, and 125 are formed in the horizontal plate 121. The through-hole 123 penetrates a pair of left and right plate surfaces of the horizontal plate 121 at a position behind the front end of the horizontal plate 121 and behind the fixing hole 122. The through hole 124 passes through a pair of left and right plate surfaces of the horizontal plate 121 at the front and rear central portions of the horizontal plate 121. The through hole 125 penetrates a pair of left and right plate surfaces of the horizontal plate 121 at the rear end portion of the horizontal plate 121.

  The lower plate 126 is a plate-like member that forms the lower part of the monitor side fixing member 120. The lower plate 126 has a pair of upper and lower plate surfaces. The plan view shape of the lower plate 126 is generally a rectangle that is long in the front-rear direction.

  Two through holes 127 and 128 are formed in the lower plate 126. The through hole 127 penetrates a pair of upper and lower plate surfaces of the lower plate 126. The through hole 128 is disposed behind the through hole 127 and penetrates a pair of upper and lower plate surfaces of the lower plate 126.

In the present embodiment, the monitor side fixing member 120 is housed in a position on the left side inside the monitor cover 6.
In addition, two screws (not shown) are inserted into the two through holes 127 and 128 respectively, and are screwed into two screw holes (not shown) formed in the monitor cover 6, whereby the monitor side fixing member 120. Is fixed to the monitor cover 6.
Further, three screws (not shown) are respectively inserted into the three through holes 123, 124, and 125, and three screw holes (not shown) formed on the left end surface of the monitor body 5 accommodated in the monitor cover 6. The monitor side fixing member 120 is fixed to “the left side portion of the monitor main body 5 accommodated in the monitor cover 6”.

A cylindrical member 130 shown in FIG. 9 is an embodiment of the cylindrical member according to the present invention.
The cylindrical member 130 of the present embodiment is manufactured by cutting a steel pipe (a pipe made of a steel material that can be elastically deformed) with an appropriate length and appropriately performing a cutting process.
The cylindrical member 130 is a substantially cylindrical member, and has an outer peripheral surface 131, an inner peripheral surface 132, and a pair of end surfaces 133 and 134. In the present embodiment, the axial direction of the cylindrical member 130 is parallel to the left-right direction.

An escape groove 135 is formed on the inner peripheral surface 132 of the cylindrical member 130. The escape groove 135 is an embodiment of the escape groove according to the present invention.
The escape groove 135 of the present embodiment reaches from the inner peripheral surface 132 to the outer peripheral surface 131 (cuts in the radial direction of the cylindrical member 130) and reaches from the end surface 133 to the end surface 134 (axial direction of the cylindrical member 130). To be cut through).
The escape groove 135 has a certain width L3 in the circumferential direction of the cylindrical member 130 (see FIG. 13B). That is, the wall surface 135a and the wall surface 135b of the escape groove 135 are formed with a certain distance.

Two engaging protrusions 136 and 137 are formed at one end of the cylindrical member 130 (left end in the case of the present embodiment).
More specifically, the two engaging protrusions 136 and 137 both protrude from the left end surface 133 to the left (in the axial direction of the cylindrical member 130).
The engagement protrusion 136 is disposed at a position continuous with the wall surface 135 a of the escape groove 135 on the left end surface 133 of the cylindrical member 130. The engagement protrusion 137 is disposed at a position that is continuous with the wall surface 135 b of the escape groove 135 on the left end surface 133 of the cylindrical member 130.
The two engaging protrusions 136 and 137 are an embodiment of the engaging protrusion according to the present invention.

As shown in FIG. 5, two engagement protrusions 136 and 137 formed on the cylindrical member 130 are engaged with two engagement holes 113 and 114 formed on the horizontal plate 111 of the ceiling-side fixing member 110, respectively. The cylindrical member 130 is fixed to the ceiling-side fixing member 110 by welding a portion where the left end surface 133 (see FIG. 9) of the member 130 contacts the right-side plate surface (see FIG. 7) of the horizontal plate 111. .
The cylindrical member 130 fixed to the ceiling side fixing member 110 is not relatively movable with respect to the ceiling side fixing member 110 and is not relatively rotatable around the axis of the cylindrical member 130.
When the cylindrical member 130 is fixed to the ceiling-side fixing member 110, the axis of the cylindrical member 130 (a straight line passing through the center of the inner peripheral surface 132 of the cylindrical member 130 and parallel to the left-right direction) and the center of the shaft support hole 112 The line (a straight line passing through the center of the shaft support hole 112 and parallel to the left-right direction) is a straight line (matches).
In the present embodiment, when the cylindrical member 130 is fixed to the ceiling-side fixing member 110, the escape groove 135 is disposed above the shaft support hole 112 (and thus the axis of the cylindrical member 130).

A shaft member 140 shown in FIG. 10 is an embodiment of the shaft member according to the present invention.
The shaft member 140 of the present embodiment is manufactured by cutting a steel bar (a bar made of a steel material) to an appropriate length and appropriately performing a cutting process.
The shaft member 140 includes a body portion 141, a shaft support portion 145, and a fixing portion 147. The shaft member 140 has a shape in which the shaft support portion 145, the body portion 141, and the fixing portion 147 are arranged (stacked) in this order in the axial direction of the shaft member 140. The axial direction of the shaft member 140 of this embodiment is parallel to the left-right direction.

The body part 141 is a part constituting the body of the shaft member 140, and has an outer peripheral surface 142 and a pair of left and right end surfaces 143 and 144.
As shown in FIG. 10, the outer peripheral surface 142 is a surface formed as a linear locus parallel to the axial direction of the shaft member 140, and in the circumferential direction of the shaft member 140, the first contact surface 142 a and the first separation surface 142 c are sequentially arranged. The second contact surface 142b and the second separation surface 142d.

As shown in FIG. 11, in the present embodiment, the portion of the outer peripheral surface 142 in which the counterclockwise phase φ in the left side view is from 0 ° to 54 ° (the portion satisfying 0 ° ≦ φ ≦ 54 °) is the first. A contact surface 142a is formed.
Similarly, a portion of the outer peripheral surface 142 whose phase φ is between 54 ° and 144 ° (a portion satisfying 54 ° <φ <144 °) forms the first separation surface 142c.
A portion of the outer peripheral surface 142 having a phase φ of 144 ° to 270 ° (a portion satisfying 144 ° ≦ φ ≦ 270 °) forms the second contact surface 142b.
Of the outer circumferential surface 142, a portion where the phase φ is from 270 ° to 360 ° (a portion satisfying 270 ° <φ <360 °) forms the second separation surface 142d.

As shown in FIG. 11, the radius R2 of the circumscribed circle 7 (circle indicated by a dotted line in FIG. 11) in contact with the first abutting surface 142a and the second abutting surface 142b is the center 7a of the circumscribed circle 7 from the first separating surface 142c. And the distance from the second separating surface 142d to the center 7a of the circumscribed circle 7 is larger.
In other words, when the shaft member 140 is manufactured by cutting a part of the outer peripheral portion of the columnar member using a columnar member having a radius R2 made of a metal material as a starting material, the outer periphery of the columnar member Of the surfaces, the surfaces corresponding to the uncut portions form the first contact surface 142a and the second contact surface 142b, and the surfaces corresponding to the cut portions are the first separation surface 142c and the second separation surface 142d. Is made.

The radius R2 of the circumscribed circle 7 shown in FIG. 11 is larger than the radius R1 of the inner peripheral surface 132 of the cylindrical member 130 shown in FIG. 9 (R2> R1).
Note that the axis of the shaft member 140 of the present embodiment is defined as a line that passes through the center 7a of the circumscribed circle 7 and is parallel to the left-right direction.

As shown in FIG. 10, the shaft support portion 145 is a substantially cylindrical portion that protrudes leftward from the left end surface 143 of the body portion 141. The center line of the shaft support 145 (center line when the shaft support 145 is viewed as a rotating body) and the axis of the shaft member 140 are in a straight line (match).
A ring-shaped fitting groove 145 a extending in the circumferential direction of the shaft support portion 145 is formed on the outer peripheral surface of the shaft support portion 145.

As shown in FIG. 10B, the fixing portion 147 is a massive portion that protrudes rightward from the right end surface 144 of the body portion 141.
The fixing portion 147 has an outer peripheral surface in which a pair of opposed curved surfaces and a pair of parallel planes are alternately connected, and a right end surface. The fixed portion 147 has a shape in which a pair of arcs and a pair of parallel straight lines are alternately arranged in a side view.

As shown in FIG. 6, the fixing portion 147 of the shaft member 140 is inserted into the fixing hole 122 formed in the horizontal plate 121 of the monitor side fixing member 120, and the right end surface 144 of the body portion 141 of the shaft member 140 (FIG. 10). (B)) and the left side plate surface (see FIG. 8) of the horizontal plate 121 of the monitor side fixing member 120 are welded so that one end portion (right end portion) of the shaft member 140 is on the monitor side. It is fixed to the fixing member 120.
The shaft member 140 fixed to the monitor-side fixing member 120 cannot move relative to the monitor-side fixing member 120 and cannot rotate relative to the axis of the shaft member 140.

  As shown in FIG. 5, the shaft member 140 (and thus the monitor side) is formed by penetrating the shaft support portion 145 of the shaft member 140 into the shaft support hole 112 (see FIG. 7) formed in the horizontal plate 111 of the ceiling side fixing member 110. The fixing member 120) is pivotally supported by the ceiling side fixing member 110 so as to be rotatable.

Further, the E-ring 150 is fitted into the fitting groove 145a of the shaft support portion 145 that is inserted into the shaft support hole 112 (see FIG. 7), so that the shaft member 140 cannot be detached from the ceiling side fixing member 110. Is done.
More specifically, when the E-ring 150 is fitted in the fitting groove 145a in a state where the shaft support portion 145 is inserted into the shaft support hole 112, the left end surface 143 of the body portion 141 of the shaft member 140 (FIG. 10). (See (a) of FIG. 7) lightly abuts on the right plate surface of the horizontal plate 111 (see (a) of FIG. 7), and the right panel surface of the E-ring 150 slightly contacts the left plate surface of the horizontal plate 111 (see FIG. Therefore, the shaft member 140 cannot move relative to the ceiling-side fixing member 110 in the left-right direction (the axial direction of the shaft member 140).

  Further, in this embodiment, the diameter (inner diameter) of the shaft support hole 112 is larger than the diameter (outer diameter) of the shaft support portion 145, and is between the inner peripheral surface of the shaft support hole 112 and the outer peripheral surface of the shaft support portion 145. Since there is play (backlash), the shaft member 140 pivotally supported by the ceiling side fixing member 110 is “play between the inner peripheral surface of the shaft support hole 112 and the outer peripheral surface of the shaft support portion 145”. It is possible to move relative to the ceiling-side fixing member 110 in the vertical direction and the front-rear direction.

As shown in FIGS. 5 and 6, when the shaft member 140 is pivotally supported by the ceiling side fixing member 110, the shaft member 140 is accommodated in the cylindrical member 130 and the outer peripheral surface of the body portion 141 of the shaft member 140. 142 faces the inner peripheral surface 132 of the cylindrical member 130.
The axial direction of the cylindrical member 130 fixed to the ceiling-side fixing member 110 and the axial direction of the shaft member 140 that is rotatably supported by the ceiling-side fixing member 110 and accommodated in the cylindrical member 130 are parallel to each other. (In the case of this embodiment, the axial direction of the cylindrical member 130 and the axial direction of the shaft member 140 are both parallel to the left-right direction).

  Hereinafter, the relationship between the rotation angle θ and the behavior of the cylindrical member 130 and the shaft member 140 will be described with reference to FIGS. 12 and 13.

As shown in FIG. 13, the width L1 of the first contact surface 142a in the circumferential direction of the shaft member 140 (more specifically, the phase φ that is the portion of the first contact surface 142a that contacts the circumscribed circle 7 is around 27 °. Is smaller than the width L3 of the escape groove 135 in the circumferential direction of the cylindrical member 130 (more specifically, the width L3 of the opening on the inner peripheral surface 132 side of the escape groove 135) (L1 <L3). ).
The width L2 of the second contact surface 142b in the circumferential direction of the shaft member 140 is the width L3 of the escape groove 135 in the circumferential direction of the cylindrical member 130 (more specifically, the opening on the inner circumferential surface 132 side of the escape groove 135). Part width L3) (L2> L3).

  As shown in FIG. 12A, when the rotation angle θ of the monitor 4 with respect to the ceiling plate 1 is 0 ° (θ = 0 °), the first contact surface 142a of the shaft member 140, more specifically, A portion of the one abutment surface 142a that is in contact with the circumscribed circle 7 and whose phase φ is in the vicinity of 27 ° (see FIG. 11) faces the relief groove 135 formed in the cylindrical member 130, and is a wall surface of the relief groove 135. It is arranged at a position close to 135a.

  As shown in FIG. 12B, when the rotation angle θ of the monitor 4 with respect to the ceiling board 1 is 20 ° (θ = 20 °), the first contact surface 142a of the shaft member 140, more specifically, A portion of the one abutment surface 142a that is in contact with the circumscribed circle 7 and whose phase φ is in the vicinity of 27 ° (see FIG. 11) faces the relief groove 135 formed in the cylindrical member 130, and is a wall surface of the relief groove 135. It is arranged at a position close to 135b.

  Therefore, when the rotation angle θ is in the range from 0 ° to 20 ° (0 ° ≦ θ ≦ 20 °), the first contact surface 142a of the shaft member 140, more specifically, the first contact surface 142a. Of these, a portion (see FIG. 11) having a phase φ in the vicinity of 27 ° which is a portion in contact with the circumscribed circle 7 faces the escape groove 135 formed in the cylindrical member 130 (does not face the inner peripheral surface 132 of the cylindrical member 130). )

The radius R2 (see FIG. 11) of the circumscribed circle 7 in contact with the first contact surface 142a and the second contact surface 142b of the shaft member 140 is larger than the radius R1 (see FIG. 9) of the inner peripheral surface 132 of the cylindrical member 130. However, when the rotation angle θ is in the range from 0 ° to 20 ° (0 ° ≦ θ ≦ 20 °), the shaft member is the amount of play between the end surface of the shaft support hole 112 and the outer peripheral surface of the shaft support portion 145. 140 moves upward with respect to the ceiling-side fixing member 110 (and thus the cylindrical member 130), and a portion corresponding to the first contact surface 142a in the body portion 141 of the shaft member 140 is accommodated in the escape groove 135.
As a result, the second contact surface 142b contacts the inner peripheral surface 132, but the first contact surface 142a does not contact the inner peripheral surface 132, so the cylindrical member 130 does not elastically deform.
Accordingly, a frictional force caused by the elastic force of the cylindrical member 130 (the force by which the elastically deformed cylindrical member 130 returns to the original shape) is generated at the portion where the second contact surface 142b and the inner peripheral surface 132 are in contact. do not do.

As shown in FIGS. 12B and 12C, when the rotation angle θ of the monitor 4 with respect to the ceiling plate 1 is in the range from 20 ° to 180 ° (20 ° <θ ≦ 180 °), The first contact surface 142 a of the shaft member 140 does not face the escape groove 135 formed in the cylindrical member 130 but faces the inner peripheral surface 132 of the cylindrical member 130.
Further, when the rotation angle θ of the monitor 4 with respect to the ceiling board 1 is in a range from 20 ° to 180 ° (20 ° <θ ≦ 180 °), at least a part of the second contact surface 142b of the shaft member 140 is It faces the inner peripheral surface 132 of the cylindrical member 130.
The radius R2 (see FIG. 11) of the circumscribed circle 7 in contact with the first contact surface 142a and the second contact surface 142b of the body portion 141 of the shaft member 140 is the radius R1 (see FIG. 9) of the inner peripheral surface 132 of the cylindrical member 130. Therefore, when the rotation angle θ of the monitor 4 with respect to the ceiling plate 1 is in the range from 20 ° to 180 ° (20 ° <θ ≦ 180 °), the first contact surface 142a of the shaft member 140 and the second The two abutting surfaces 142b abut against the inner peripheral surface 132 of the cylindrical member 130, and the cylindrical member 130 is elastically deformed so as to be spread in the radial direction of the cylindrical member 130 (direction perpendicular to the axial direction of the cylindrical member 130).
Therefore, the elastic force of the cylindrical member 130 (the elastically deformed cylindrical member) is applied to the portion where the first contact surface 142a and the inner peripheral surface 132 are in contact and the portion where the second contact surface 142b and the inner peripheral surface 132 are in contact. A frictional force is generated due to the force (130) that 130 tries to return to its original shape.

  Hereinafter, the behavior of the hinge 100 when the monitor 4 rotates with respect to the ceiling board 1 will be described with reference to FIGS. 1 to 4 and FIG. 12.

As shown in FIG. 1 and FIG. 4A, when the rotation angle θ of the monitor 4 with respect to the ceiling board 1 is 0 ° (θ = 0 °), the monitor 4 is the “left side wall” of the ceiling-side cover 3. , And are disposed in a portion surrounded by the “right wall portion” and the “rear wall portion”.
Further, the rear end surface of the monitor cover 6 of the monitor 4 faces the front surface of the rear wall portion of the ceiling side cover 3, and a locking hole 6 b (see FIG. 2) formed on the rear end surface of the monitor cover 6. The protrusion of the locking member 3a is fitted.
By fitting the protrusion of the locking member 3a into the locking hole 6b of the monitor cover 6, the monitor 4 is supported by the ceiling plate 1 via the hinges 100L and 100R and the locking member 3a (ceiling side cover 3). Therefore, the rotation of the monitor 4 with respect to the ceiling board 1 is restricted, and the rotation angle θ of the monitor 4 with respect to the ceiling board 1 is maintained at 0 °.

  When the passenger sitting on the rear seat of the automobile in the state shown in FIGS. 1 and 4 pushes the push button portion of the locking member 3a upward, the protrusion of the locking member 3a is the ceiling side cover 3. It moves (retracts) to a position behind the front surface of the rear wall portion, is accommodated in the inner space of the rear wall portion of the ceiling-side cover 3, and the protruding portion of the locking member 3 a is the locking hole 6 b of the monitor cover 6. The state fitted in is released.

As shown in FIGS. 12A and 12B, when the rotation angle θ of the monitor 4 with respect to the ceiling board 1 is in the range from 0 ° to 20 ° (0 ° ≦ θ ≦ 20 °), The portion where the outer peripheral surface 142 of the shaft member 140 (more specifically, the first contact surface 142a and the second contact surface 142b) and the inner peripheral surface 132 of the cylindrical member 130 contact each other is affected by the elastic force of the cylindrical member 130. The resulting frictional force does not occur.
Therefore, when the state in which the protruding portion of the locking member 3a is fitted in the locking hole 6b of the monitor cover 6 is released, the monitor 4 is turned until the rotation angle θ of the monitor 4 with respect to the ceiling plate 1 becomes 20 °. It rotates by its own weight in the clockwise direction when viewed from the left side (see FIGS. 2 and 4B).

  As shown in FIGS. 12B and 12C, when the rotation angle θ of the monitor 4 with respect to the ceiling plate 1 is in the range from 20 ° to 180 ° (20 ° <θ ≦ 180 °), The portion where the outer peripheral surface 142 of the shaft member 140 (more specifically, the first contact surface 142a and the second contact surface 142b) and the inner peripheral surface 132 of the cylindrical member 130 contact each other is affected by the elastic force of the cylindrical member 130. The resulting frictional force is generated.

  Therefore, as shown in FIG. 2 and FIG. 4B, when the rotation angle θ of the monitor 4 with respect to the ceiling board 1 reaches 20 °, the frictional force is generated and the monitor 4 rotates with respect to the ceiling board 1. The monitor 4 is positioned at a position where the rotation angle θ of the monitor 4 with respect to the ceiling plate 1 is 20 ° (more strictly, in order to cancel the kinetic energy when the monitor 4 rotates by its own weight with the frictional force. Since it rotates by α ° extra (α; positive value), it is held at a position where the rotation angle θ is (20 + α) °.

  In addition, as shown in FIGS. 2, 3, 4 (b) and 4 (c), the rotation angle θ of the monitor 4 with respect to the ceiling plate 1 is in a range from 20 ° to 180 ° (20 ° <θ ≦ 180 °), the passenger sitting in the rear seat of the automobile holds the monitor 4 with his hand and pushes it forward or pulls it backward, so that the outer peripheral surface 142 of the shaft member 140 and the cylindrical member 130 It is possible to rotate the monitor 4 against the frictional force generated at the portion where the peripheral surface 132 abuts.

  Further, as shown in FIGS. 2, 3, 4B and 4C, the rotation angle θ of the monitor 4 with respect to the ceiling board 1 is in a range from 20 ° to 180 ° (20 ° <θ ≦ 180 °), when the passenger sitting on the back seat of the car releases his hand from the monitor 4, the rotation angle θ of the monitor 4 with respect to the ceiling board 1 when the passenger releases his hand from the monitor 4 Is retained.

  Thus, the passenger sitting in the back seat of the automobile is in the range of 20 ° to 180 ° (20 ° <θ ≦ 180 °) of the monitor 4 with respect to the ceiling plate 1 with respect to the ceiling plate 1. The rotation angle of the monitor 4 can be changed to a desired rotation angle (for example, an angle at which the passenger can easily view the image display surface of the monitor main body 5) and can be held.

As described above, the hinge 100L is
A hinge for pivotally connecting the monitor 4 to the ceiling plate 1,
A ceiling-side fixing member 110 fixed to the ceiling plate 1;
A monitor side fixing member 120 fixed to the monitor 4;
A cylindrical member 130 having an inner peripheral surface 132 and fixed to the ceiling side fixing member 110;
It has an outer peripheral surface 142, one end (right end) is fixed to the monitor side fixing member 120, the other end (left end) is pivotally supported by the ceiling side fixing member 110, and the cylindrical member 130. A shaft member 140 housed in
Comprising
The axial direction of the cylindrical member 130 and the axial direction of the shaft member 140 are parallel to each other (in this embodiment, both are parallel to the left-right direction),
An escape groove 135 is formed on the inner peripheral surface 132 of the cylindrical member 130,
The outer peripheral surface 142 of the shaft member 140 is divided into a first contact surface 142a, a first separation surface 142c, a second contact surface 142b, and a second separation surface 142d in order in the circumferential direction of the shaft member 140.
The radius R2 of the circumscribed circle 7 in contact with the first abutting surface 142a and the second abutting surface 142b is larger than the distance from the first separating surface 142c to the center 7a of the circumscribed circle 7, and from the second separating surface 142d to the circumscribed circle. 7 is larger than the distance to the center 7a and larger than the radius R1 of the inner peripheral surface 132 of the cylindrical member 130,
The width L1 of the first contact surface 142a in the circumferential direction of the shaft member 140 is smaller than the width L3 of the escape groove 135 in the circumferential direction of the cylindrical member 130,
When the first contact surface 142a faces the escape groove 135 (0 ° ≦ θ ≦ 20 °), a portion of the shaft member 140 corresponding to the first contact surface 142a is accommodated in the escape groove 135, so that the cylindrical member 130 is not elastically deformed,
When the first contact surface 142a faces the inner peripheral surface 132 of the cylindrical member 130 (20 ° <θ ≦ 180 °), the first contact surface 142a and the second contact surface 142b are the inner peripheral surface of the cylindrical member 130. The cylindrical member 130 is elastically deformed so as to be pushed and spread in the radial direction of the cylindrical member 130 by abutting against the second member 132, and the first contact surface 142 a and the inner peripheral surface 132 of the cylindrical member 130 are in contact with each other and the second contact A frictional force is generated at the portion where the contact surface 142b and the inner peripheral surface 132 of the cylindrical member 130 abut.
With this configuration, when the rotation angle of the monitor-side fixing member 120 with respect to the ceiling-side fixing member 110 is within a predetermined range (when 20 ° <θ ≦ 180 °), the rotation regulating force (ceiling) This is a force that restricts the rotation of the monitor-side fixing member 120 relative to the side fixing member 110, and in this embodiment, it is possible to generate a frictional force caused by the elastic force of the cylindrical member 130). When the rotation angle of the monitor-side fixing member 120 with respect to the ceiling-side fixing member 110 is outside a predetermined range (when 0 ° ≦ θ ≦ 20 °), it is possible to prevent the rotation restricting force from being generated.

Moreover, two engagement holes 113 and 114 are formed in the ceiling side fixing member 110,
Two engaging projections 136 and 137 are formed on one end (left end) of the cylindrical member 130,
The two engaging protrusions 136 and 137 engage with the two engaging holes 113 and 114, respectively, so that the cylindrical member 130 is fixed to the ceiling-side fixing member 110 so as not to be relatively rotatable around the axis of the cylindrical member 130.
With this configuration, it is possible to fix the cylindrical member 130 to the ceiling-side fixing member 110 so as not to be relatively rotatable around the axis of the cylindrical member 130 with a simple structure.

In the present embodiment, the two engagement protrusions 136 and 137 engage with the two engagement holes 113 and 114, respectively, but the present invention is not limited to this.
That is, the number of the engaging protrusions formed on the cylindrical member and the engaging protrusions formed on the first wing member may be single or plural.

In the present embodiment, the ceiling-side fixing member 110 and the cylindrical member 130 are separate bodies (separate members), and these are fixed by welding. However, the present invention is not limited to this, and the ceiling-side fixing member 110 and The cylindrical member 130 may be integrated (may be formed integrally).
That is, in the present invention, “the cylindrical member is fixed to the first wing member” includes “the first wing member and the cylindrical member are integrally molded”.

In this embodiment, the monitor side fixing member 120 and the shaft member 140 are separate bodies (separate members), and these are fixed by welding. However, the present invention is not limited to this, and the monitor side fixing member 120 and The shaft member 140 may be integrated (may be integrally formed).
That is, in the present invention, “the shaft member is fixed to the second wing member” includes “the second wing member and the shaft member are integrally molded”.

  In this embodiment, the width L2 of the second contact surface 142b in the circumferential direction of the shaft member 140 is larger than the width L3 of the escape groove 135 in the circumferential direction of the cylindrical member 130, but the present invention is not limited to this. For example, the shaft member 240 shown in FIG. 14 may be used.

The shaft member 240 shown in FIG. 14 has a first contact surface 242a, a first separation surface 242c, a second contact surface 242b, and a second separation surface 242d as outer peripheral surfaces thereof. The width of the first contact surface 242 a and the width of the second contact surface 242 b in the circumferential direction of the shaft member 240 are both smaller than the width of the escape groove 135 in the circumferential direction of the cylindrical member 130.
In the case of the shaft member 240 shown in FIG. 14, when either one of the first contact surface 242a and the second contact surface 242b faces the escape groove 135 formed in the cylindrical member 130, the cylindrical member 130 is elastically deformed. do not do.
When the first contact surface 242a and the second contact surface 242b are opposed to the inner peripheral surface 132 of the cylindrical member 130, the first contact surface 242a and the second contact surface 242b are in contact with the inner peripheral surface 132, The cylindrical member 130 is elastically deformed.
Thus, the width of the second contact surface in the circumferential direction of the shaft member according to the present invention may be larger than the width of the escape groove in the circumferential direction of the cylindrical member, or may be smaller than the width of the escape groove. .
More specifically, the second abutment surface in the circumferential direction of the shaft member according to how the range of the rotation angle in which the rotation restricting force (friction force caused by the elastic force of the cylindrical member) is generated is set. It is desirable to appropriately select the width.

  In this embodiment, the relief groove 135 formed on the inner peripheral surface 132 of the cylindrical member 130 reaches from the inner peripheral surface 132 to the outer peripheral surface 131 (cut in the radial direction of the cylindrical member 130). It is not limited to. For example, it may be a cylindrical member 230 shown in FIG.

A cylindrical member 230 shown in FIG. 15A is a substantially cylindrical member, and has an outer peripheral surface 231, an inner peripheral surface 232, and a pair of end surfaces.
An escape groove 235 is formed on the inner peripheral surface 232 of the cylindrical member 230.
The escape groove 235 opens on the inner peripheral surface 232, but does not open on the outer peripheral surface 231.
More specifically, the escape groove 235 does not reach the outer peripheral surface 231, and the depth of the escape groove 235 (the depth in the radial direction of the cylindrical member 230) is the thickness of the cylindrical member 230 (from the outer peripheral surface 231 to the inner peripheral surface 232). About half of the distance).
As described above, the relief groove according to the present invention is opened at least on the inner peripheral surface of the cylindrical member, and the cylindrical member is accommodated by accommodating a portion corresponding to the first contact surface of the shaft member inside the escape groove. It does not have to be elastically deformed, and the escape groove does not have to reach the cylindrical outer peripheral surface.
More specifically, whether the escape groove reaches the cylindrical outer peripheral surface, the thickness of the cylindrical member, the material constituting the cylindrical member, the diameter of the circumscribed circle of the outer peripheral surface of the shaft member, and the inner diameter of the cylindrical member The magnitude of the difference from the diameter of the peripheral surface is desirably selected as appropriate according to the required amount of elastic deformation of the cylindrical member (and consequently the magnitude of the frictional force generated between the shaft member).

  In the present embodiment, one escape groove 135 is formed on the inner peripheral surface 132 of the cylindrical member 130, but the present invention is not limited to this. For example, it may be a cylindrical member 330 shown in FIG.

A cylindrical member 330 shown in FIG. 15B is a substantially cylindrical member, and has an outer peripheral surface 331, an inner peripheral surface 332, and a pair of end surfaces.
Relief grooves 335 and 335 are formed on the inner peripheral surface 332 of the cylindrical member 330.
Thus, you may form two or more escape grooves in the internal peripheral surface of the cylindrical member which concerns on this invention.

  In this embodiment, the escape groove 135 formed on the inner peripheral surface 132 of the cylindrical member 130 reaches from the end surface 133 to the end surface 134 (is cut in the axial direction of the cylindrical member 130), but the present invention is not limited to this. . For example, it may be a cylindrical member 430 shown in FIG.

A cylindrical member 430 shown in FIG. 16 is a substantially cylindrical member, and has an outer peripheral surface 431, an inner peripheral surface 432, and a pair of end surfaces 433 and 434.
An escape groove 435 is formed on the inner peripheral surface 432 of the cylindrical member 430. The escape groove 435 has a pair of opposing wall surfaces 435a and 435b.
The escape groove 435 reaches from the inner peripheral surface 432 to the outer peripheral surface 431 (cut in the radial direction of the cylindrical member 430).
The escape groove 435 is open at the end face 433 but is not open at the end face 434.
That is, the left end portion of the escape groove 435 is disposed in the middle of the cylindrical member 430 in the axial direction, and does not reach the end surface 434.
Thus, the relief groove formed on the inner peripheral surface of the cylindrical member according to the present invention may be open on both of the pair of end surfaces of the cylindrical member (cut from one end surface of the cylindrical member to the other end surface). May be open on one end face of the cylindrical member and may not be open on the other end face, or may not be open on either of the pair of end faces of the cylindrical member (cylindrical). It may be formed only in the middle part in the axial direction of the member).

The hinge 100L of this embodiment includes the ceiling side fixing member 110, the monitor side fixing member 120, the cylindrical member 130, and the shaft member 140, but the hinge according to the present invention is not limited to this.
For example, (i) when the ceiling-side fixing member 110 is a part of the ceiling board 1, the ceiling-side fixing member 110 can be omitted from the members provided in the hinge 100L.
(Ii) When the monitor-side fixing member 120 is a part of the monitor 4, the monitor-side fixing member 120 can be omitted from the members provided in the hinge 100L.
(Iii) When the ceiling-side fixing member 110 is a part of the ceiling board 1 and the monitor-side fixing member 120 is a part of the monitor 4, the ceiling-side fixing member 110 is changed from the member provided in the hinge 100L. In addition, the monitor side fixing member 120 can be omitted.
That is, the hinges according to the present invention may have the following configurations (A) to (C).

(A) A hinge for rotatably connecting the second connection object to the first connection object,
A second wing member fixed to the second connection object;
A cylindrical member having an inner peripheral surface and fixed to the first connection object;
A shaft member having an outer peripheral surface, one end fixed to the second wing member, the other end pivotally supported by the first connection object, and housed in the cylindrical member;
It comprises.
The configuration (A) corresponds to the case (i).

(B) A hinge for rotatably connecting the second connection object to the first connection object,
A first wing member fixed to the first connection object;
A cylindrical member having an inner peripheral surface and fixed to the first wing member;
A shaft member having an outer peripheral surface, one end fixed to the second connection object, the other end pivotally supported by the first wing member, and housed in the cylindrical member;
It comprises.
The configuration (B) corresponds to the case (ii).

(C) A hinge for rotatably connecting the second connection object to the first connection object,
A cylindrical member having an inner peripheral surface and fixed to the first connection object;
A shaft member having an outer peripheral surface, one end fixed to the second connection object, the other end pivotally supported by the first connection object, and housed in the cylindrical member;
It comprises.
The configuration of (C) corresponds to the case of (iii).

The hinge 100L of the present embodiment is used for the purpose of connecting the monitor 4 to the ceiling plate 1 so as to be rotatable, but the present invention is not limited to this, and the hinge according to the present invention may be used for other purposes.
Examples of other uses of the hinge according to the present invention include a use of connecting a door to a wall in a rotatable manner, a use of connecting a lid of a container to a main body of the container in a rotatable manner, and the like.

1 Ceiling board (first object to be connected)
2 Monitor unit 3 Ceiling side cover 4 Monitor (second connected object)
5 Monitor body 6 Monitor cover 100L / 100R Hinge 110 Ceiling side fixing member (first wing member)
120 Monitor side fixing member (second wing member)
130 cylindrical member 132 inner peripheral surface 135 escape groove 140 shaft member 142 outer peripheral surface 142a first contact surface 142b second contact surface 142c first spacing surface 142d second spacing surface

Claims (8)

A hinge for pivotally connecting the second connection object to the first connection object,
A first wing member fixed to the first connection object;
A second wing member fixed to the second connection object;
A cylindrical member having an inner peripheral surface and fixed to the first wing member;
A shaft member having an outer peripheral surface, one end fixed to the second wing member, the other end pivotally supported by the first wing member, and housed in the cylindrical member;
Comprising
The axial direction of the cylindrical member and the axial direction of the shaft member are parallel to each other,
An escape groove is formed on the inner peripheral surface of the cylindrical member,
The outer peripheral surface of the shaft member is sequentially divided into a first contact surface, a first separation surface, a second contact surface, and a second separation surface in the circumferential direction of the shaft member,
A radius of a circumscribed circle in contact with the first abutting surface and the second abutting surface is larger than a distance from the first separated surface to the center of the circumscribed circle, and the center of the circumscribed circle from the second separated surface Greater than the distance to and greater than the radius of the inner peripheral surface of the cylindrical member,
The width of the first contact surface in the circumferential direction of the shaft member is smaller than the width of the escape groove in the circumferential direction of the cylindrical member,
When the first contact surface is opposed to the escape groove, the cylindrical member is not elastically deformed by accommodating a portion of the shaft member corresponding to the first contact surface in the escape groove,
When the first contact surface is opposed to the inner peripheral surface of the cylindrical member, the first contact surface and the second contact surface are in contact with the inner peripheral surface of the cylindrical member, whereby the cylindrical member is A portion that is elastically deformed so as to be spread in the radial direction of the cylindrical member, the first contact surface and the inner peripheral surface of the cylindrical member abut, the second contact surface, and the inner peripheral surface of the cylindrical member A frictional force is generated at the part where the
Hinge. An engagement recess is formed in the first wing member,
The same number of engaging convex portions as the engaging concave portions are formed at one end of the cylindrical member,
When the engaging convex part engages with the engaging concave part, the cylindrical member is fixed to the first wing member so as not to be relatively rotatable around the axis of the cylindrical member.
The hinge according to claim 1. A hinge for pivotally connecting the second connection object to the first connection object,
A second wing member fixed to the second connection object;
A cylindrical member having an inner peripheral surface and fixed to the first connection object;
A shaft member having an outer peripheral surface, one end fixed to the second wing member, the other end pivotally supported by the first connection object, and housed in the cylindrical member;
Comprising
The axial direction of the cylindrical member and the axial direction of the shaft member are parallel to each other,
An escape groove is formed on the inner peripheral surface of the cylindrical member,
The outer peripheral surface of the shaft member is sequentially divided into a first contact surface, a first separation surface, a second contact surface, and a second separation surface in the circumferential direction of the shaft member,
A radius of a circumscribed circle in contact with the first abutting surface and the second abutting surface is larger than a distance from the first separated surface to the center of the circumscribed circle, and the center of the circumscribed circle from the second separated surface Greater than the distance to and greater than the radius of the inner peripheral surface of the cylindrical member,
The width of the first contact surface in the circumferential direction of the shaft member is smaller than the width of the escape groove in the circumferential direction of the cylindrical member,
When the first contact surface is opposed to the escape groove, the cylindrical member is not elastically deformed by accommodating a portion of the shaft member corresponding to the first contact surface in the escape groove,
When the first contact surface is opposed to the inner peripheral surface of the cylindrical member, the first contact surface and the second contact surface are in contact with the inner peripheral surface of the cylindrical member, whereby the cylindrical member is A portion that is elastically deformed so as to be spread in the radial direction of the cylindrical member, the first contact surface and the inner peripheral surface of the cylindrical member abut, the second contact surface, and the inner peripheral surface of the cylindrical member A frictional force is generated at the part where the
Hinge. An engagement recess is formed in the first connection object,
The same number of engaging convex portions as the engaging concave portions are formed at one end of the cylindrical member,
By engaging the engaging convex portion with the engaging concave portion, the cylindrical member is fixed to the first connection object so as not to be relatively rotatable around the axis of the cylindrical member.
The hinge according to claim 3. A hinge for pivotally connecting the second connection object to the first connection object,
A first wing member fixed to the first connection object;
A cylindrical member having an inner peripheral surface and fixed to the first wing member;
A shaft member having an outer peripheral surface, one end fixed to the second connection object, the other end pivotally supported by the first wing member, and housed in the cylindrical member;
Comprising
The axial direction of the cylindrical member and the axial direction of the shaft member are parallel to each other,
An escape groove is formed on the inner peripheral surface of the cylindrical member,
The outer peripheral surface of the shaft member is sequentially divided into a first contact surface, a first separation surface, a second contact surface, and a second separation surface in the circumferential direction of the shaft member,
A radius of a circumscribed circle in contact with the first abutting surface and the second abutting surface is larger than a distance from the first separated surface to the center of the circumscribed circle, and the center of the circumscribed circle from the second separated surface Greater than the distance to and greater than the radius of the inner peripheral surface of the cylindrical member,
The width of the first contact surface in the circumferential direction of the shaft member is smaller than the width of the escape groove in the circumferential direction of the cylindrical member,
When the first contact surface is opposed to the escape groove, the cylindrical member is not elastically deformed by accommodating a portion of the shaft member corresponding to the first contact surface in the escape groove,
When the first contact surface is opposed to the inner peripheral surface of the cylindrical member, the first contact surface and the second contact surface are in contact with the inner peripheral surface of the cylindrical member, whereby the cylindrical member is A portion that is elastically deformed so as to be spread in the radial direction of the cylindrical member, the first contact surface and the inner peripheral surface of the cylindrical member abut, the second contact surface, and the inner peripheral surface of the cylindrical member A frictional force is generated at the part where the
Hinge. An engagement recess is formed in the first wing member,
The same number of engaging convex portions as the engaging concave portions are formed at one end of the cylindrical member,
When the engaging convex part engages with the engaging concave part, the cylindrical member is fixed to the first wing member so as not to be relatively rotatable around the axis of the cylindrical member.
The hinge according to claim 5. A hinge for pivotally connecting the second connection object to the first connection object,
A cylindrical member having an inner peripheral surface and fixed to the first connection object;
A shaft member having an outer peripheral surface, one end fixed to the second connection object, the other end pivotally supported by the first connection object, and housed in the cylindrical member;
Comprising
The axial direction of the cylindrical member and the axial direction of the shaft member are parallel to each other,
An escape groove is formed on the inner peripheral surface of the cylindrical member,
The outer peripheral surface of the shaft member is divided into a first contact surface, a first separation surface, a second contact surface, and a second separation surface in the circumferential direction of the shaft member,
A radius of a circumscribed circle in contact with the first abutting surface and the second abutting surface is larger than a distance from the first separated surface to the center of the circumscribed circle, and the center of the circumscribed circle from the second separated surface Greater than the distance to and greater than the radius of the inner peripheral surface of the cylindrical member,
The width of the first contact surface in the circumferential direction of the shaft member is smaller than the width of the escape groove in the circumferential direction of the cylindrical member,
When the first contact surface is opposed to the escape groove, the cylindrical member is not elastically deformed by accommodating a portion of the shaft member corresponding to the first contact surface in the escape groove,
When the first contact surface is opposed to the inner peripheral surface of the cylindrical member, the first contact surface and the second contact surface are in contact with the inner peripheral surface of the cylindrical member, whereby the cylindrical member is A portion that is elastically deformed so as to be spread in the radial direction of the cylindrical member, the first contact surface and the inner peripheral surface of the cylindrical member abut, the second contact surface, and the inner peripheral surface of the cylindrical member A frictional force is generated at the part where the
Hinge. An engagement recess is formed in the first connection object,
The engaging projection is formed at one end of the cylindrical member,
By engaging the engaging convex portion with the engaging concave portion, the cylindrical member is fixed to the first connection object so as not to be relatively rotatable around the axis of the cylindrical member.
The hinge according to claim 7.

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