JP2010144916A - Universal joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact universal joint capable of holding an attitude. <P>SOLUTION: The universal joint 1 includes: a pair of first turning bolts 34, 34 turnably journaled to a first mounting bracket 10; a pair of second turning bolts 35, 35 orthogonal to the pair of first turning bolts 34, 34 and turnably journaled to a second mounting bracket 20; a pair of first braking members 36, 36 generating braking force between the pair of first turning bolts 34, 34 and the first mounting bracket 10 to regulate turning of the first mounting bracket 10 around the axis of the pair of first turning bolts 34, 34 with respect to a connecting bracket 30; and a pair of second braking members 37, 37 generating braking force between the pair of second turning bolts 35, 35 and the second mounting bracket 20 to regulate turning of the second mounting bracket 20 around the axis of the second turning bolts 35, 35 with respect to the connecting bracket 30. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a universal joint that rotatably connects one of two parts to the other.

Conventionally, universal joints that pivotably connect one of two parts to the other are known. For example, a universal joint is widely known as a kind of such a universal joint.
The universal joint includes a drive side yoke connected to the drive shaft, a driven side yoke connected to the driven shaft, and a cross pin that rotatably connects the drive side yoke and the driven side yoke.
This cross pin has a first axis and a second axis orthogonal to the first axis, and both ends of the first axis are pivotally supported by the drive side yoke, and both ends of the second axis are The driven yoke is pivotally supported so as to be rotatable.
The universal joint can transmit the driving force of the driving shaft to the driven shaft while the driving side yoke and the driven side yoke rotate with respect to each other via the cross pin.

  However, the universal joint is not intended to hold the rotating posture in a state where one of the driving side and driven side yokes is rotated at an arbitrary angle with respect to the other yoke.

In addition, a hinge technique for attaching a display device to a keyboard body so as to be openable and closable in a notebook personal computer is known (see, for example, Patent Document 1).
The tilt hinge described in Patent Document 1 is to connect the display device to the keyboard main body so as to be rotatable. The tilt hinge is attached to the keyboard main body, and is attached to the display device. And a braking member that restricts rotation of the shaft relative to the holder by generating a braking force between the holder and the shaft.
The braking member includes a disc spring that applies an urging force in the axial direction of the shaft, and a tightening nut that adjusts the urging force of the disc spring. The tilt hinge described in Patent Document 1 can regulate the rotation of the shaft by generating a frictional force according to the urging force of the disc spring by elastically deforming the disc spring.

However, in the universal joint, if the braking member related to the tilt hinge is simply assembled in the rotational connection portion of the drive side / driven side yoke and the cross focus, the rotational connection portion becomes large and eventually the universal joint itself. Becomes larger.
JP 2005-106139 A

  The present invention has been made in view of the situation as described above, and provides a compact universal joint capable of maintaining a posture.

  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 universal joint for rotatably connecting the first connection object to the second connection object,
A first attachment member attached to the first connection object;
A second attachment member attached to the second connection object;
A connecting member that rotatably connects the first mounting member and the second mounting member;
The connecting member is
A first rotating shaft member pivotally supported by the first mounting member;
The second rotation shaft member that is orthogonal to the first rotation shaft member and is rotatably supported by the second mounting member;
By generating a braking force between the first rotating shaft member and the first mounting member, the first mounting member rotates about the axis of the first rotating shaft member with respect to the connecting member. A first braking member that regulates,
By generating a braking force between the second rotating shaft member and the second mounting member, the second mounting member rotates about the axis of the second rotating shaft member with respect to the connecting member. And a second braking member that regulates this.

In claim 2,
The first braking member is
A first biasing member that applies a biasing force in the axial direction of the first rotation shaft member;
A first biasing force adjusting member that adjusts the biasing force of the first biasing member,
The second braking member is
A second biasing member that applies a biasing force in the axial direction of the second rotating shaft member;
And a second urging force adjusting member that adjusts the urging force of the second urging member.

In claim 3,
The first biasing member is
A first spring washer or a first wave washer fitted to the first rotating shaft member;
The second biasing member is
A second spring washer or a second corrugated washer fitted to the second rotating shaft member.

In claim 4,
The first attachment member is a first attachment portion attached to the first connection object;
A pair of first shaft support portions that are provided at a predetermined interval in the first mounting portion and pivotally support both end portions of the first rotation shaft member;
The second attachment member is a second attachment portion attached to the second connection object;
A pair of second shaft support portions that are provided at a predetermined interval in the second mounting portion and pivotally support both end portions of the second rotation shaft member;
An interval between the pair of first shaft support portions is larger than an interval between the pair of second shaft support portions,
The first mounting portion is formed with a notch for receiving the shaft end of the second rotating shaft member when the first mounting member rotates about the axis of the first rotating shaft member. Is.

In claim 5,
The axis of the first rotating shaft member and the axis of the second rotating shaft member are arranged in the same plane.

In claim 6,
The connecting member is
A support member for supporting the first rotation shaft member and the second rotation shaft member is provided.

In claim 7,
The shape of the support member is a cylindrical shape with one end opened and the other end closed,
The first rotating shaft member is composed of a pair of first shaft pieces,
The second rotating shaft member is composed of a pair of second shaft pieces,
The pair of first shaft pieces and the pair of second shaft pieces protrude from the outer peripheral surface of the support member,
The axes of the pair of first shaft pieces provided on the cylindrical peripheral surface of the support member are aligned with each other,
The axes of the pair of second shaft pieces provided on the cylindrical peripheral surface of the support member are aligned with each other.

In claim 8,
The support member is
Starting from a substantially cross-shaped metal plate having a substantially square central plate and four end plates respectively extending from four pieces of the central plate,
The four end plates of the metal plate are formed by being bent substantially perpendicular to the central plate at a boundary portion with the central plate.

In claim 9,
The shape of the support member is a cylindrical shape with both ends opened,
The first rotating shaft member is composed of a pair of first shaft pieces,
The second rotating shaft member is composed of a pair of second shaft pieces,
The pair of first shaft pieces and the pair of second shaft pieces protrude from the outer peripheral surface of the support member,
The axes of the pair of first shaft pieces provided on the cylindrical peripheral surface of the support member are aligned with each other,
The axes of the pair of second shaft pieces provided on the cylindrical peripheral surface of the support member are aligned with each other.

In claim 10,
A first torsion spring wound around the first rotating shaft member, having one end locked to the connecting member and the other end locked to the first mounting member is provided.

In claim 11,
A second torsion spring wound around the second rotating shaft member, having one end locked to the connecting member and the other end locked to the second mounting member is provided.

In claim 12,
A third attachment member attached to the first connection object, and disposed between the first connection object and the first attachment member;
A third rotating shaft member that pivotally supports the third mounting member on the first mounting member;
By generating a braking force between the third mounting member and the first mounting member, the third mounting member rotates about the third rotation shaft member with respect to the first mounting member. And a third braking member that regulates this.

In claim 13,
A fourth attachment member attached to the second connection object, and disposed between the second connection object and the second attachment member;
A fourth rotating shaft member that pivotally supports the fourth mounting member to the second mounting member;
By generating a braking force between the fourth mounting member and the second mounting member, the fourth mounting member rotates around the axis of the fourth rotating shaft member with respect to the second mounting member. And a fourth braking member that restricts this.

  As effects of the present invention, the following effects can be obtained.

  In claim 1, one of the first connection object and the second connection object can be rotatably connected to the other, and one of the first connection object and the second connection object is connected to the other. Since it is possible to restrict the rotation, a universal joint capable of maintaining a posture can be configured in a compact manner.

  According to the second aspect of the present invention, the braking force can be adjusted according to the weight of the connection target. Therefore, even when the connection target is heavy, the posture can be maintained by increasing the braking force.

  According to the third aspect of the present invention, since the urging member can be composed of small parts, the universal joint can be configured compactly.

  According to the fourth aspect of the present invention, since the rotation angle of the universal joint can be increased without increasing the size of the universal joint, the universal joint having a large rotation angle can be configured compactly.

  In Claim 5, since it is possible to close | squeeze the interaxial distance between a 1st connection target object and a 2nd connection target object, it is possible to comprise a universal joint compactly.

  According to a sixth aspect of the present invention, the connecting member has a function of supporting the first rotating shaft member and the second rotating shaft member, so that the first rotating shaft member and the second rotating shaft member are separated from the connecting member. Since it is not necessary to provide a dedicated member to support, the universal joint can be configured compactly.

  In claim 7, since the support member can be formed of a cylindrical member, the shape of the support member can be simplified, and the other end of the cylindrical member is closed, so that the strength of the support member is increased. It is possible to improve.

  According to the eighth aspect, since the support member can be bent and molded, the support member can be easily manufactured.

  According to the ninth aspect of the present invention, since the support member can be composed of a cylindrical member, the shape of the support member can be simplified.

  In the tenth aspect, since the rotation of the connection object can be restricted even when the weight of the connection object is large, the connection object can be reliably supported in a desired posture.

  According to the eleventh aspect, since the rotation of the connection target can be restricted even when the weight of the connection target is large, the connection target can be reliably supported in a desired posture.

  According to a twelfth aspect of the present invention, the object to be connected can be rotated about the axis of the third rotary shaft member in addition to the two directions around the axis of the first rotary shaft member and the axis of the second rotary shaft member. In addition, since the rotation of the connection object can be restricted, it is possible to configure a free joint that has a high degree of freedom in posture and can hold the posture.

  According to a thirteenth aspect of the present invention, the object to be connected can be rotated around the axis of the fourth rotary shaft member in addition to the two directions around the axis of the first rotary shaft member and the axis of the second rotary shaft member. In addition, since the rotation of the connection object can be restricted, it is possible to configure a free joint that has a high degree of freedom in posture and can hold the posture.

  Next, the best mode for carrying out the invention will be described.

First, a free joint 100 according to a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the free joint 100 according to the first embodiment connects the display device 2 to the mounting member 3 so as to be rotatable.

The display device 2 is connected to the attachment member 3 by a free joint 100, and is an embodiment of the first connection object according to the present invention.
The display device 2 refers to a device that can display an image. Specific examples of the display device include various televisions such as a cathode ray tube system, a plasma system, a liquid crystal system, or an organic EL (Organic Electro-Luminescence) system, and displays (CRT, liquid crystal display, etc.) necessary for a personal computer.

  The attachment member 3 is connected to the display device 2 by a free joint 100, and is an embodiment of the second connection object according to the present invention.

“First connection object” and “second connection object” refer to one and the other of two articles that are connected by a free joint, respectively. One of the “first connection object” and the “second connection object” may be a fixed structure or the ground.
The first connection object according to the present invention is not limited to the display device 2, and the second connection object according to the present invention is not limited to the attachment member 3.
Examples of the combination of the first connection object and the second connection object according to the present invention are selected from the group including (a) a speaker, a projector, a display device (liquid crystal display, plasma display, etc.), a mirror, and the like. And (b) building components (walls, columns, beams, etc.), furniture and other furnishings (for example, shelves for storing AV equipment such as televisions, DVD recorders, etc.), display devices on the floor Or the combination of one selected from the group containing the stand and other structures for making it stand on the ground is mentioned.

  As shown in FIGS. 1 to 3, the free joint 100 includes a first mounting bracket 10 that is mounted on the display device 2, a second mounting bracket 20 that is mounted on the mounting member 3, and the first mounting bracket 10 and the second mounting. And a connecting bracket 30 that rotatably connects the bracket 20.

  As shown in FIG. 4, the first mounting bracket 10 includes a first substrate 11 and a pair of first side plates 12 and 12.

  The first substrate 11 is a part attached to the display device 2. The first substrate 11 is a substantially rectangular plate member. A surface of the first substrate 11 facing the display device 2 is an attachment surface 111 attached to the display device 2. In the four corners of the first substrate 11, a plurality of through holes for penetrating bolts and the like are formed. A pair of notches 112 and 112 are formed on the pair of long sides of the first substrate 11, respectively. One side of the pair of first side plates 12, 12 is connected to the pair of short sides of the first substrate 11.

  In the present embodiment, a single metal plate is formed in which the pair of first side plates 12 and 12 protrudes in parallel with the plate surface of the first substrate 11 from the portions that become the pair of short sides of the first substrate 11. Thereafter, at the boundary line between the pair of short sides of the first substrate 11 and the pair of first side plates 12 and 12, the plate surface of the first substrate 11 and the plate surfaces of the pair of first side plates 12 and 12 The first mounting bracket 10 is configured by bending the metal plate so that is substantially vertical.

  The pair of notches 112 and 112 are substantially “semicircular” when viewed from the direction perpendicular to the plate surface of the first substrate 11. The pair of notches 112 and 112 are respectively disposed at substantially central portions on the pair of long sides of the first substrate 11.

  The pair of first side plates 12 and 12 are respectively connected to the pair of short sides of the first substrate 11 with a predetermined interval (interval D1 shown in FIG. 3). The plate surfaces of the pair of first side plates 12 and 12 are parallel to each other, and the plate surfaces of the pair of first side plates 12 and 12 are orthogonal to the plate surface of the first substrate 11. That is, the pair of first side plates 12 and 12 and the first substrate 11 have a substantially “U” shape when viewed from the short side of the first substrate 11.

  In addition, since the structure of a pair of 1st side plate 12 * 12 is substantially the same, in the following description, it demonstrates centering on one 1st side plate 12, and only demonstrates the other 1st side plate 12 only when needed. To do.

  The first side plate 12 extends in the direction opposite to the mounting surface 111 of the first substrate 11. The specific shape of the first side plate 12 is such that two sides facing each other are extended in parallel from both ends of the short side of the first substrate 11, and further, a predetermined shape is directed toward the center of the short side of the first substrate 11. After extending while inclining at an angle, the extending tips of the two sides are joined in a rounded state.

  A locking groove 121 is formed at the extending tip of the first side plate 12. A through-hole 122 for penetrating a bolt or the like is formed in a portion of the first side plate 12 spaced from the locking groove 121 in the direction of the mounting surface 111 by a predetermined distance. The centers of the pair of through holes 122 and 122 coincide with each other when viewed from the direction perpendicular to the plate surfaces of the pair of first side plates 12 and 12. A locking hole 123 is formed in the first side plate 12 spaced a predetermined distance from the through hole 122 in the direction of the mounting surface 111.

  The first mounting bracket 10 according to the present embodiment is formed by bending (pressing) a single plate-like member, but the first mounting member according to the present invention welds, for example, a plurality of members. Alternatively, a combination of screws may be used.

  As shown in FIG. 5, the second mounting bracket 20 includes a pair of second substrates 21 and 21 and a pair of second side plates 22 and 22.

  The pair of second substrates 21 and 21 are portions attached to the attachment member 3, respectively. The surface of the pair of second substrates 21 and 21 facing the mounting member 3 is a pair of mounting surfaces 211 and 211 that are mounted on the mounting member 3 (see FIG. 1). Each of the pair of second substrates 21 and 21 is a substantially rectangular plate member. The pair of second substrates 21 and 21 are arranged with a predetermined gap so that one side of the long side faces each other. In the pair of second substrates 21, 21, bolts are provided at four corners formed by a long side opposite to the pair of long sides facing each other (hereinafter referred to as “long side opposite to each other”) and a pair of short sides. A plurality of through holes are formed for penetrating the like. One side of the pair of second side plates 22, 22 is connected to the pair of oppositely opposed long sides of the pair of second substrates 21, 21.

  In the present embodiment, the pair of second side plates 22, 22 protrudes in parallel with the plate surfaces of the pair of second substrates 21, 21 from the opposite long sides of the pair of second substrates 21, 21. After the two metal plates are formed, the pair of second substrates 21 at the boundary line between the pair of second substrates 21 and 21 and the pair of second side plates 22 and 22 that are opposite long sides of the pair of second substrates 21 and 21. The second mounting bracket 20 is configured by bending the metal plate so that the plate surface of 21 and the plate surfaces of the pair of second side plates 22 and 22 are substantially perpendicular.

  The pair of second side plates 22 and 22 are connected to the long sides on the opposite side of the pair of second substrates 21 and 21 with a predetermined interval (interval D2 shown in FIG. 3). Here, as shown in FIG. 3, the distance D2 between the pair of second side plates 22 and 22 in the second mounting bracket 20 is smaller than the distance D1 between the pair of first side plates 12 and 12 in the first mounting bracket 10. That is, the distance D1 between the pair of first side plates 12 and 12 in the first mounting bracket 10 is larger than the distance D2 between the pair of second side plates 22 and 22 in the second mounting bracket 20.

  The plate surfaces of the pair of second side plates 22 and 22 are parallel to each other, and the plate surfaces of the pair of second side plates 22 and 22 are orthogonal to the plate surfaces of the pair of second substrates 21 and 21. That is, the pair of second side plates 22 and 22 and the pair of second substrates 21 and 21 have a substantially “U” shape when viewed from the longitudinal direction of the pair of second substrates 21 and 21.

  In addition, since the structure of a pair of 2nd side plates 22 and 22 is substantially the same, in the following description, it demonstrates centering around the 1st 2nd side plate 22, and only demonstrates the other 2nd side plate 22 only when it is required. To do.

  As shown in FIG. 5, the second side plate 22 extends in the direction opposite to the mounting surface 211 of the second substrate 21. The specific shape of the second side plate 22 is such that two sides facing each other from the opposite ends of the pair of second substrates 21, 21 are at a predetermined angle toward the center of the long side of the second substrate 21. After extending while tilting, the extending tip portions of the two sides are bent toward the central portion of the long side of the second substrate 21 to form one side parallel to the long side of the second substrate 21. It is a shape to join.

  A locking groove 221 is formed at the extending tip of the second side plate 22. A through hole 222 for penetrating a bolt or the like is formed in a portion of the second side plate 22 that is spaced from the locking groove 221 in the direction of the mounting surface 211 by a predetermined distance. The centers of the pair of through holes 222 and 222 coincide with each other when viewed from the direction perpendicular to the plate surfaces of the pair of second side plates 22 and 22. A locking hole 223 is formed in the second side plate 22 that is spaced from the through hole 222 in the direction of the mounting surface 211.

  The second mounting bracket 20 according to the present embodiment is formed by bending (pressing) a plate-like member, but the second mounting member according to the present invention is, for example, welded or screwed with a plurality of members. A combination of these may be used. Moreover, although a pair of 2nd board | substrates 21 and 21 which concern on a present Example combine two plate-shaped members, the 2nd attachment part which concerns on this invention comprises a single plate-shaped member. May be.

As shown in FIG. 6, the connection bracket 30 includes a substrate 31, a pair of long side plates 32 and 32, and a pair of short side plates 33 and 33.
The substrate 31 is an embodiment of the central plate of the metal plate according to the present invention, and the combination of the pair of long side plates 32 and 32 and the pair of short side plates 33 and 33 is an embodiment of the four end plates according to the present invention. A combination of the substrate 31, the pair of long side plates 32 and 32, and the pair of short side plates 33 and 33 is an embodiment of the support member according to the present invention.

  The substrate 31, the pair of long side plates 32, 32, and the pair of short side plates 33, 33 are all substantially rectangular plate members. The long sides of the pair of long side plates 32 and 32 are connected to the pair of long sides of the substrate 31, respectively, and the long sides of the pair of short side plates 33 and 33 are connected to the pair of short sides of the substrate 31, respectively.

In this embodiment, the pair of long side plates 32 and 32 protrudes in parallel with the plate surface of the substrate 31 from the pair of long side portions of the substrate 31 and the pair of long side plates 32 and 32 protrudes from the pair of short side portions of the substrate 31. The short side plates 33 and 33 are formed as a starting material from a single metal plate (substantially cross-shaped) projecting parallel to the plate surface of the substrate 31, and then a pair of long sides of the substrate 31 are formed. The pair of long side plates 32, 32 are bent in one direction perpendicular to the plate surface of the substrate 31 at the boundary line, and the pair of short side plates 33, 32 are formed at the boundary line with the pair of short sides of the substrate 31. One embodiment of the support member according to the present invention is formed by bending 33 in one direction orthogonal to the plate surface of the substrate 31.
In other words, the combination of the substrate 31, the pair of long side plates 32 and 32, and the pair of short side plates 33 and 33 is formed by bending the boundary portion so that “one end is opened and the other end is closed. "

  The plate surfaces of the pair of long side plates 32 and 32 are parallel to each other. A pair of through-holes 321 and 321 for penetrating bolts and the like are formed at substantially central portions of the pair of long side plates 32 and 32. The centers of the pair of through holes 321 and 321 coincide with each other when viewed from the short direction of the substrate 31.

  The plate surfaces of the pair of short side plates 33 and 33 are parallel to each other. A pair of through holes 331 and 331 for penetrating bolts and the like are formed at substantially the center of the pair of short side plates 33 and 33. The centers of the pair of through holes 331 and 331 coincide with each other when viewed from the longitudinal direction of the substrate 31.

  In the present embodiment, the centers of the pair of through holes 321 and 321 and the centers of the pair of through holes 331 and 331 are arranged in the same plane. A line connecting the centers of the pair of through holes 321 and 321 and a line connecting the centers of the pair of through holes 331 and 331 are orthogonal to each other when viewed from a direction perpendicular to the plate surface of the substrate 31.

In addition, although the connection bracket 30 which concerns on a present Example is comprised in "the substantially rectangular parallelepiped shape by which one end was opened and the other end was obstruct | occluded," the connection member which concerns on this invention is not limited to this. For example, the shape of the connecting member may be “substantially columnar shape with one end opened and the other end closed (cylindrical shape with one end opened)” or “substantially frame shape (square tube shape with both ends opened)” Or “substantially annular (cylindrical with both ends opened)”.
However, from the viewpoint of further improving the strength of the connecting member, “a cylindrical shape in which one end is opened and the other end is closed” rather than a “cylindrical shape in which both ends are open (including a cylindrical shape and a square cylindrical shape)”. (Including cylindrical and rectangular tube shapes) "is desirable.

As shown in FIGS. 7 to 9, the connecting bracket 30 includes a pair of first rotating bolts 34, 34, a pair of second rotating bolts 35, 35, a pair of first braking members 36, 36, A pair of second braking members 37.
The pair of first rotating bolts 34 and 34 is an embodiment of the first shaft member according to the present invention and an embodiment of the pair of first shaft pieces according to the present invention.
The pair of second rotating bolts 35 and 35 is an embodiment of the second shaft member according to the present invention and an embodiment of the pair of second shaft pieces according to the present invention.

  As shown in FIGS. 7 and 9, the pair of first rotating bolts 34 and 34 are pivotally supported by the first mounting bracket 10 so as to be rotatable. Each of the pair of first rotation bolts 34 and 34 has a head 341 and a shaft portion 342 extending from the head 341. The shaft portions 342 and 342 of the pair of first rotating bolts 34 and 34 are respectively connected to the through holes 331 and 331 of the pair of short side plates 33 and 33 of the connection bracket 30 and the pair of first side plates 12 of the first mounting bracket 10. -It penetrates in 12 through-holes 122-122. The pair of shaft portions 342 and 342 are rotatably supported by the pair of first side plates 12 and 12. A pair of male screw portions 342A and 342A are formed at the ends of the pair of shaft portions 342 and 342 protruding from the pair of first side plates 12 and 12, respectively.

  The pair of first braking members 36, 36 generates a braking force between the pair of first rotating bolts 34, 34 and the first mounting bracket 10, so that the second mounting bracket 20 is applied to the connection bracket 30. The rotation of the pair of first rotation bolts 34 and 34 around the axis is restricted.

  Here, “around the axis of the first rotation bolt 34” refers to a circumferential direction around the axis of the first rotation bolt 34 when the first rotation bolt 34 is viewed from the axial direction. .

  In addition, since the structure of a pair of 1st braking members 36 and 36 is substantially the same, in the following description, it demonstrates focusing on one braking member 36, and demonstrates only the other braking member 36 only when needed. .

  The first braking member 36 includes a first corrugated washer 361, a first nut 362, and washers 363 to 367.

  The first corrugated washer 361 applies an urging force in the axial direction of the first rotating bolt 34. The first corrugated washer 361 is disposed between the first nut 362 and the first side plate 12. The first corrugated washer 361 is fitted to the first rotating bolt 34 so as to be rotatable about the axis of the first rotating bolt 34.

  The first nut 362 adjusts the urging force of the first corrugated washer 361. The first nut 362 is screwed into the male thread portion 342A of the first rotation bolt 34. That is, when the first nut 362 is tightened or loosened, the urging force of the first corrugated washer 361 is arbitrarily set. A washer 363 is disposed between the first nut 362 and the first corrugated washer 361, and a washer 364 is disposed between the first corrugated washer 361 and the first side plate 12.

  The washer 363 is fitted to the first rotation bolt 34 so that it cannot rotate about the axis of the first rotation bolt 34.

  The washer 364 is fitted to the first rotation bolt 34 so as not to rotate about the axis of the first rotation bolt 34. The washer 364 is applied with the biasing force of the first corrugated washer 361. The urging direction of the washer 364 is the first side plate 12 side direction in the axial direction of the first rotating bolt 34. A washer 365 is disposed between the washer 364 and the first side plate 12.

  The washer 365 has a locking piece 365 </ b> A and is fitted to the first rotating bolt 34. Since the washer 365 fitted to the first rotating bolt 34 is locked in the locking groove 121 of the first side plate 12 by the locking piece 365A, the washer 365 and the first mounting bracket 10 are integrally formed in the first time. It rotates around the axis of the dynamic bolt 34. A frictional force is generated between the washer 365 and the washer 364 by the urging force of the first corrugated washer 361. That is, this frictional force becomes a braking force that restricts the connection bracket 30 from rotating about the axis of the pair of first rotation bolts 34 and 34 with respect to the first mounting bracket 10. A washer 366 is disposed between the first side plate 12 and the short side plate 33.

  The washer 366 has a locking piece 366 </ b> A and is fitted to the first rotation bolt 34. Since the washer 366 fitted to the first rotating bolt 34 is locked in the locking hole 123 of the first side plate 12 by the locking piece 366A, the washer 366 and the first mounting bracket 10 are integrated together in the first time. It rotates around the axis of the dynamic bolt 34. A washer 367 is disposed between the washer 366 and the short side plate 33.

  The washer 367 is fitted to the first rotation bolt 34 so as not to rotate about the axis of the first rotation bolt 34. A frictional force is generated between the washer 367 and the washer 366 by the urging force of the first corrugated washer 361. That is, this frictional force becomes a braking force that restricts the connection bracket 30 from rotating about the axis of the pair of first rotation bolts 34 and 34 with respect to the second mounting bracket 20.

In addition, although a pair of 1st rotation bolt 34 * 34 which concerns on a present Example is comprised combining two bolts comprised separately, the 1st rotation shaft member which concerns on this invention is comprised. , You may comprise with one shaft member.
Further, the first urging member according to the present invention is not limited to the pair of first corrugated washers 361 and 361 according to the present embodiment, and may be, for example, a spring washer or the like.

  As shown in FIGS. 8 and 9, the pair of second rotating bolts 35, 35 are pivotally supported by the second mounting bracket 20 so as to be rotatable. The pair of second rotation bolts 35 and 35 are orthogonal to the pair of first rotation bolts 34 and 34. Each of the pair of second rotating bolts 35 and 35 includes a head 351 and a shaft portion 352 extending from the head 351. The pair of shaft portions 352 and 352 of the pair of second rotating bolts 35 and 35 are respectively connected to the through holes 321 and 321 of the pair of long side plates 32 and 32 of the connection bracket 30 and the pair of second portions of the second mounting bracket 20. The through holes 222 and 222 of the side plates 22 and 22 are inserted. The pair of shaft portions 352 and 352 are pivotally supported by the pair of second side plates 22 and 22 so as to be rotatable. A pair of male screw portions 352A and 352A are formed at the ends of the pair of shaft portions 352 and 352 protruding from the pair of second side plates 22 and 22, respectively.

  The pair of second braking members 37, 37 generates a braking force between the pair of second rotating bolts 35, 35 and the second mounting bracket 20, so that the second mounting bracket 20 acts on the connection bracket 30. The rotation of the pair of second rotation bolts 35 and 35 around the axis is restricted.

  Here, “around the axis of the second rotating bolt 35” refers to a circumferential direction around the axis of the second rotating bolt 35 when the second rotating bolt 35 is viewed from the axial direction. .

  In addition, since the structure of a pair of 2nd braking members 37 and 37 is substantially the same, in the following description, it demonstrates focusing on one braking member 37, and demonstrates only the other braking member 37 only when needed. .

  The second braking member 37 includes a second corrugated washer 371, a second nut 372, and washers 363 to 367.

  The second corrugated washer 371 applies an urging force in the axial direction of the second rotating bolt 35. The second corrugated washer 371 is disposed between the second nut 372 and the second side plate 22. The second corrugated washer 371 is fitted to the second rotating bolt 35 so as to be rotatable around the axis of the second rotating bolt 35.

  The second nut 372 adjusts the urging force of the second corrugated washer 371. The second nut 372 is screwed into the male thread portion 352 </ b> A of the second rotation bolt 35. That is, the biasing force of the second corrugated washer 371 is arbitrarily set by tightening or loosening the second nut 372. A washer 373 is disposed between the second nut 372 and the second corrugated washer 371, and a washer 374 is disposed between the second corrugated washer 371 and the second side plate 22.

  The washer 373 is fitted to the second rotation bolt 35 so that it cannot rotate about the axis of the second rotation bolt 35.

  The washer 374 is fitted to the second rotation bolt 35 so as not to rotate about the axis of the second rotation bolt 35. The washer 374 is applied with the urging force of the second corrugated washer 371. The urging direction of the washer 374 is the second side plate 22 side direction in the axial direction of the second rotating bolt 35. A washer 375 is disposed between the washer 374 and the second side plate 22.

The washer 375 has a locking piece 375 </ b> A that is locked in the locking groove 221 of the second side plate 22, and is fitted to the second rotating bolt 35.
Since the washer 375 fitted to the second rotating bolt 35 is locked in the locking groove 221 of the second side plate 22 by the locking piece 375A, the washer 375 and the second mounting bracket 20 are integrally formed in the second time. It rotates around the axis of the dynamic bolt 35. A frictional force is generated between the washer 375 and the washer 374 by the biasing force of the second corrugated washer 371. That is, this frictional force is a braking force that restricts the connection bracket 30 from rotating about the axis of the pair of second rotation bolts 35 and 35 with respect to the second mounting bracket 20. A washer 376 is disposed between the second side plate 22 and the long side plate 32.

The washer 376 has a locking piece 376 </ b> A that locks in the locking hole 223 of the second side plate 22, and is fitted to the second rotating bolt 35.
Since the washer 376 fitted to the second rotating bolt 35 is locked in the locking hole 223 of the second side plate 22 by the locking piece 376A, the washer 376 and the second mounting bracket 20 are integrally formed in the second time. It rotates around the axis of the dynamic bolt 35. A washer 377 is disposed between the washer 376 and the long side plate 32.

  The washer 377 is fitted to the second rotation bolt 35 so that it cannot rotate about the axis of the second rotation bolt 35. A frictional force is generated between the washer 377 and the washer 376 by the urging force of the second corrugated washer 371. That is, this frictional force is a braking force that restricts the connection bracket 30 from rotating about the axis of the pair of second rotation bolts 35 and 35 with respect to the second mounting bracket 20.

In addition, although a pair of 2nd rotation bolt 35 * 35 which concerns on a present Example is comprised combining two bolts comprised separately, the 2nd rotation shaft member which concerns on this invention is comprised. , You may comprise with one shaft member.
The second urging member according to the present invention is not limited to the pair of second corrugated washers 371 and 371 according to the present embodiment, and may be, for example, a spring washer or the like.

  In the free joint 100 configured as described above, as shown in FIGS. 10 and 11, the first mounting bracket 10 is rotated about the axis of the pair of first rotating bolts 34 and 34 (in the horizontal direction in this embodiment). While moving (see FIG. 10), the second mounting bracket 20 rotates around the axis of the pair of second rotating bolts 35 and 35 (in the vertical direction in this embodiment) (see FIG. 11).

  Here, as shown in FIG. 10, when the first mounting bracket 10 is rotated around the axis of the pair of first rotating bolts 34, 34, the shaft portions 352 of the pair of second rotating bolts 35, 35 are arranged. The end of 352 and the pair of second nuts 372 and 372 are accommodated in the pair of notches 112 and 112. As a result, the rotation angle of the first mounting bracket 10 can be increased, and as a result, the rotation angle of the universal joint 1 can be increased.

The pair of notches 112 and 112 according to the present embodiment is substantially “semicircular” when viewed from the direction perpendicular to the plate surface of the first substrate 11. The shape of the part is not limited to this, and may be a hole or a long hole (groove).
That is, the shape of the notch according to the present invention may be any shape that can prevent the second rotating member and the second braking member from contacting (interfering) with the first mounting portion.

  As described above, the free joint 100 according to one embodiment of the present invention is a universal joint 1 that rotatably connects the display device 2 that is the first connection object to the mounting member 3 that is the second connection object. The first mounting bracket 10 serving as a first mounting member mounted on the display device 2, the second mounting bracket 20 serving as the second mounting member mounted on the mounting member 3, the first mounting bracket 10 and the second mounting bracket 20. And a connecting bracket 30 serving as a connecting member that is rotatably connected to each other, and the connecting bracket 30 is a pair of first rotating shaft members that are pivotally supported by the first mounting bracket 10. A pair of second rotation shafts 34 and 34 and a pair of second rotation shaft members that are orthogonal to the pair of first rotation bolts 34 and 34 and are pivotally supported by the second mounting bracket 20. Times By generating a braking force between the bolts 35, 35, the pair of first rotating bolts 34, 34, and the first mounting bracket 10, the first mounting bracket 10 is paired with the connection bracket 30. A braking force is applied between the pair of first braking members 36, 36 that restrict the rotation of the dynamic bolts 34, 34 around the axis, and the pair of second rotating bolts 35, 35 and the second mounting bracket 20. A pair of second braking members 37 and 37 for restricting the second mounting bracket 20 from rotating about the axis of the pair of second rotating bolts 35 and 35 with respect to the connecting bracket 30 by being generated. Is.

  With such a configuration, the display device 2 can be connected to the attachment member 3 so as to be rotatable, and the display device 2 can be restricted from rotating with respect to the attachment member 3. The joint 1 can be configured compactly.

  The pair of first braking members 36 and 36 are a pair of first corrugated washers 361 and 361 serving as a first biasing member that applies a biasing force in the axial direction of the pair of first rotating bolts 34 and 34. A pair of first nuts 362 and 362 serving as a first biasing force adjusting member that adjusts a biasing force of the pair of first corrugated washers 361 and 361, and the pair of second braking members 37 and 37 is a pair of first nuts A pair of second corrugated washers 371 and 371 serving as a second biasing member that imparts a biasing force in the axial direction of the two rotating bolts 35 and 35, and a pair of second corrugated washers 371 and 371 for adjusting the biasing force. And a pair of second nuts 372 and 372 serving as two urging force adjusting members.

  With such a configuration, the braking force can be adjusted according to the weight of the display device 2, so that even when the display device 2 is heavy, the posture can be maintained by increasing the braking force.

  The first urging member is a pair of first corrugated washers 361 and 361 fitted to the pair of first rotating bolts 34 and 34, and the second urging member is a pair of second rotating bolts. A pair of second corrugated washers 371 and 371 fitted to 35 and 35.

  With such a configuration, the urging member can be composed of a pair of first corrugated washers 361 and 361 and a pair of second corrugated washers 371 and 371, which are small parts. It is possible to configure.

  Furthermore, the first mounting bracket 10 is provided with a first substrate 11 serving as a first mounting portion to be mounted on the display device 2 and a predetermined distance D1 between the first substrate 11 and a pair of first rotating bolts 34. The first side plates 12 and 12 serving as a pair of first shaft support portions that pivotally support both end portions of 34, and the second mounting bracket 20 is a second mounting portion that is attached to the mounting member 3. The pair of second substrates 21 and 21 and the pair of second substrates 21 and 21 are provided with a predetermined distance D2, and both ends of the pair of second rotation bolts 35 and 35 are pivotable. A pair of second side plates 22 and 22 that serve as a pair of second shaft support portions, and a distance D1 between the pair of first side plates 12 and 12 is larger than a distance D2 between the pair of second side plates 22 and 22, A first mounting bracket 10 has a pair of first rotating bolts on the first substrate 11. A pair of cutout portions 112, 112 to accommodate the shaft end portions of the pair of second pivot bolt 35, 35 when pivoted about the axis 34, 34 is intended to be formed on the first substrate 11.

  With such a configuration, it is possible to increase the rotation angle of the universal joint 1 without increasing the size of the universal joint 1, so that the universal joint 1 having a large rotation angle can be configured compactly. It is.

  The axis of the pair of first rotation bolts 34 and 34 and the axis of the pair of second rotation bolts 35 and 35 are arranged in the same plane.

  With such a configuration, the distance between the axes of the pair of first rotation bolts 34 and 34 and the pair of second rotation bolts 35 and 35 can be reduced, so that the universal joint 1 is configured to be compact. Is possible.

  The connecting bracket 30 is a support member that supports the pair of first rotating bolts 34 and 34 and the pair of second rotating bolts 35 and 35, and includes a substrate 31, a pair of long side plates 32 and 32, and a pair of short plates. A combination of side plates 33 and 33 is provided.

  With such a configuration, the connection bracket 30 has a function of supporting the pair of first rotation bolts 34 and 34 and the pair of second rotation bolts 35 and 35, so that the pair of first rotation bolts 35 and 35 is separated from the connection bracket 30. Since it is not necessary to provide a dedicated member for supporting the rotating bolts 34 and 34 and the pair of second rotating bolts 35 and 35, the universal joint 1 can be configured compactly.

  Further, the shape of the support member is a cylindrical shape with one end opened and the other end closed, and the first rotation shaft member is formed from a pair of first rotation bolts 34 and 34 that form a pair of first shaft pieces. The second rotation shaft member is composed of a pair of second rotation bolts 35 and 35 that form a pair of second shaft pieces, and the pair of first rotation bolts 34 and 34 and the pair of second rotation bolts 35 and 35. 35 protrudes from the outer peripheral surface of the support member, and the axes of the pair of first rotating bolts 34 and 34 provided on the cylindrical peripheral surface of the support member are aligned with each other, and are provided on the cylindrical peripheral surface of the support member. The axes of the pair of second rotating bolts 35 and 35 are aligned with each other.

  With such a configuration, since the support member can be configured by a cylindrical member, the shape of the support member can be simplified, and the other end of the cylindrical member is closed, so that the strength of the support member can be increased. It is possible to improve.

  The support member includes a substrate 31 serving as a substantially square central plate, a pair of long side plates 32 and 32 and a pair of short side plates 33 and 33 serving as four end plates respectively extending from four pieces of the substrate 31. By using a substantially cross-shaped metal plate as a starting material, and bending a pair of long side plates 32 and 32 and a pair of short side plates 33 and 33 of the metal plate substantially perpendicular to the substrate 31 at the boundary with the substrate 31 It is to be molded.

  With such a configuration, since the support member can be bent and molded, the support member can be easily manufactured.

  The support member has a cylindrical shape with both ends opened, and the first rotation shaft member includes a pair of first rotation bolts 34 and 34 that form a pair of first shaft pieces. The member includes a pair of second rotating bolts 35 and 35 that form a pair of second shaft pieces, and the pair of first rotating bolts 34 and 34 and the pair of second rotating bolts 35 and 35 are outer peripheral surfaces of the support member. The axis of the pair of first rotating bolts 34 and 34 provided on the cylindrical peripheral surface of the support member is aligned with each other, and a pair of second rotary provided on the cylindrical peripheral surface of the support member The axes of the bolts 35 and 35 are aligned with each other.

  With such a configuration, since the support member can be configured by a cylindrical member, the shape of the support member can be simplified.

  Note that the first mounting bracket 10, the second mounting bracket 20, and the connection bracket 30 according to the present embodiment are all made of a metal material, but the first mounting member and the second mounting according to the present invention. The material constituting the member and the connecting member is not limited to a metal material, and may be, for example, a resin material, wood, ceramic, or the like.

Next, a free joint 200 according to a second embodiment of the present invention will be described with reference to FIG.
In FIG. 12, members having the same reference numerals as those in the first embodiment have substantially the same configurations as those in the first embodiment, and thus detailed description thereof is omitted.

  As shown in FIG. 12, the free joint 200 according to the second embodiment includes a second rotating shaft member 38 and a torsion spring 39 wound around the second rotating shaft member 38.

The second rotation shaft member 38 is pivotally supported by the second mounting bracket 20 so as to be rotatable. The second rotation shaft member 38 is orthogonal to the pair of first rotation bolts 34 and 34.
The second rotation shaft member 38 includes a shaft portion 381 and a pair of bolt portions 382 and 382.

The shaft portion 381 is bridged between the pair of long side plates 32 and 32 of the connection bracket 30. The cross-sectional shape of the shaft portion 381 is circular when viewed from the axial direction.
The pair of bolt portions 382 and 382 are respectively inserted into the through holes 321 and 321 of the pair of long side plates 32 and 32 of the connection bracket 30 and the through holes 222 and 222 of the pair of second side plates 22 and 22 of the second mounting bracket 20. Intruded.
The pair of bolt portions 382 and 382 are provided with a second corrugated washer 371, a second nut 372, and washers 373 to 377 constituting the pair of second braking members 37 and 37, respectively.
The ends of the pair of bolt portions 382 and 382 protrude from the through holes 222 and 222 of the pair of second side plates 22 and 22 of the second mounting bracket 20.
A pair of male screw portions 382A and 382A are formed at the ends of the pair of bolt portions 382 and 382, respectively. A pair of second nuts 372 and 372 are screwed into the pair of male screw portions 382A and 382A, respectively.

  The torsion spring 39 applies a biasing force around the axis of the second rotation shaft member 38. The torsion spring 39 is wound around the shaft portion 381 of the second rotation shaft member 38. One end 391 of the torsion spring 39 is locked to the plate surface of the substrate 31 of the connection bracket 30. The other end 392 of the torsion spring 39 is bent into a substantially “L” shape and is locked to the mounting surface 211 of the second substrate 21 of the second mounting bracket 20. An insertion hole 211 </ b> A into which the other end 392 of the torsion spring 39 is inserted is opened in the second substrate 21 of the second mounting bracket 20.

  With such a configuration, when the second mounting bracket 20 rotates around the axis of the second rotation shaft member 38 with respect to the connection bracket 30, the torsion spring in the direction opposite to the direction in which the second mounting bracket 20 rotates. The urging force of 39 acts on the second mounting bracket 20 to restrict the rotation of the second mounting bracket 20.

Here, of the pair of long side plates 32 and 32 of the connection bracket 30 according to the present embodiment, one long side plate 32 is “the substrate 31, the other long side plate 32, and the pair of short side plates 33 and 33 are connected. The “member to be configured” (hereinafter referred to as “connecting bracket body”) is a separate member. That is, one long side plate 32 can be attached to and detached from the connecting bracket body.
The end of one long side plate 32 on the substrate 31 side is bent along the plate surface of the substrate 31 and extends in the direction of the other long side plate 32. That is, the cross-sectional shape of one long side plate 32 is substantially “L” shape when viewed from the longitudinal direction of the long side plate 32. One long side plate 32 and the substrate 31 are fixed with screws or the like in a state where the opposing plate surfaces are aligned.

  With such a configuration, the second rotation shaft member 38 is assembled to the connecting bracket body, and then one long side plate 32 is assembled to the second rotation shaft member 38 (or the second rotation shaft member 38 is assembled to the one long side plate 32. Since the connecting bracket body can be assembled to the connecting bracket 30, the second rotating shaft member 38 can be easily assembled to the connecting bracket 30.

As described above, the free joint 200 according to the second embodiment of the present invention includes the torsion spring 39 wound around the second rotating shaft member 38, and one end 391 of the torsion spring 39 is connected to the connection bracket 30. While being locked, the other end 392 of the torsion spring 39 is locked to the second mounting bracket 20, and the second mounting bracket 20 is connected to the second rotation shaft member 38 with respect to the connection bracket 30. The rotation about the axis is restricted.
With such a configuration, even when the weight of the connection target attached to the second mounting bracket 20 is large, the rotation of the connection target can be restricted, so that the connection target is reliably supported in a desired posture. it can.

  In the present embodiment, the torsion spring 39 is wound around the second rotating shaft member, but the present invention is not limited to this. That is, it is good also as a structure which comprises the torsion spring wound by the 1st rotating shaft member, one end part being latched by a connection member, and the other end part latching by a 1st attachment member.

Next, a free joint 300 according to a third embodiment of the present invention will be described with reference to FIG.
In FIG. 13, members having the same reference numerals as those in the first embodiment have substantially the same configurations as those in the first embodiment, and thus detailed description thereof is omitted.

  As shown in FIG. 13, the free joint 300 according to the third embodiment includes a third mounting bracket 41, a third rotating bolt 42, and a third braking member 43.

The free joint 300 is different from the free joint 100 shown in FIG. 1 in that a third mounting bracket 41 is attached to a connection object (the display device 2 shown in FIG. 1).
That is, in the free joint 100 according to the first embodiment, the first mounting bracket 10 is directly attached to the connection object (the display device 2 shown in FIG. 1), whereas in the free joint 300 according to the present embodiment. The first mounting bracket 10 is attached to the connection object via the third mounting bracket 41.

The third mounting bracket 41 is a plate-like member having a substantially square plate surface. The surface of the third mounting bracket 41 facing the display device 2 (see FIG. 1) is a mounting surface 411 that is mounted on the display device 2.
Note that the shape of the plate surface of the third mounting bracket 41 is not limited to a substantially square shape, and may be any shape that can be attached to the connection object.

The third rotating bolt 42 is an embodiment of the third rotating shaft member according to the present invention. The third rotation bolt 42 is disposed between the third mounting bracket 41 and the first mounting bracket 10. The third rotation bolt 42 is orthogonal to the first rotation bolt 34.
The third rotation bolt 42 has a head 421 and a pair of shaft portions 422 and 422.

  The pair of shaft portions 422 and 422 project to the third mounting bracket 41 side and the first mounting bracket 10 side with the head portion 421 interposed therebetween. A pair of male screw portions 422A and 422A are formed at the ends of the pair of shaft portions 422 and 422, respectively.

  In the following description, of the pair of shaft portions 422, the shaft portion 422 that protrudes toward the third mounting bracket 41 with the head portion 421 interposed therebetween is referred to as a “shaft portion 422 on the third mounting bracket 41 side”. A shaft portion 422 that protrudes toward the first mounting bracket 10 with a pinch therebetween is referred to as a “shaft portion 422 on the first mounting bracket 10 side”.

The third mounting bracket 41 is attached to the shaft portion 422 on the third mounting bracket 41 side so as to be movable in the axial direction of the shaft portion 422. In the present embodiment, the third mounting bracket 41 is fitted to the shaft portion 422 on the third mounting bracket 41 side so as not to rotate around the axis of the third rotating bolt 42.
The first mounting bracket 10 is rotatably supported on the shaft portion 422 on the first mounting bracket 10 side.

  The third braking member 43 generates a braking force between the third rotating bolt 42 and the first mounting bracket 10, so that the third mounting bracket 41 is connected to the connection bracket 30 with the axis of the third rotating bolt 42. Regulates turning around.

  Here, “around the axis of the third rotation bolt 42” refers to a circumferential direction around the axis of the third rotation bolt 42 when the third rotation bolt 42 is viewed from the axial direction. .

  The third braking member 43 includes a pair of third nuts 431 and 431, a third corrugated washer 432, and washers 433 to 436.

  The pair of third nuts 431 and 431 are screwed into a pair of male screw portions 422A and 422A formed on the pair of shaft portions 422 and 422 of the third rotating bolt 42, respectively. The third mounting bracket 41 can be attached to and detached from the third rotating bolt 42 by tightening or loosening the third nut 431 screwed into the shaft portion 422 (male thread portion 422A) on the third mounting bracket 41 side. Is possible.

The third corrugated washer 432 applies a biasing force in the axial direction of the third rotating bolt 42. The third corrugated washer 432 is disposed between the third nut 431 screwed into the shaft portion 422 (male screw portion 422A) on the first mounting bracket 10 side and the first substrate 11 of the first mounting bracket 10. . The third corrugated washer 432 is fitted to the shaft portion 422 on the first mounting bracket 10 side so as to be rotatable around the axis of the third rotation bolt 42.
The biasing force of the third corrugated washer 432 is arbitrarily set by tightening or loosening the third nut 431 screwed into the shaft portion 422 (male screw portion 422A) on the first mounting bracket 10 side.
A washer 433 is disposed between the third corrugated washer 432 and the third nut 431 screwed into the shaft portion 422 (male thread portion 422A) on the first mounting bracket 10 side, and the third corrugated washer 432 and A washer 434 is disposed between the first substrate 11 and the first substrate 11.

  The washer 433 is fitted to the shaft portion 422 on the first mounting bracket 10 side so as not to rotate about the axis of the third rotation bolt 42.

  The washer 434 is fitted to the shaft portion 422 on the first mounting bracket 10 side so as not to rotate about the axis of the third rotation bolt 42. The washer 434 is applied with the urging force of the third corrugated washer 432. The urging direction of the washer 434 is the third mounting bracket 41 side direction in the axial direction of the third rotating bolt 42. A washer 435 is disposed between the washer 434 and the first substrate 11.

  The washer 435 has a locking piece 435A and is fitted to the shaft portion 422 on the first mounting bracket 10 side. Since the washer 435 fitted to the shaft portion 422 on the first mounting bracket 10 side is locked to the locking hole 112 of the first substrate 11 by the locking piece 435A, the washer 435 and the first mounting bracket 10 are integrated. Then, it rotates about the axis of the third rotation bolt 42. A frictional force is generated between the washer 435 and the washer 434 by the urging force of the third corrugated washer 432. That is, this frictional force becomes a braking force that restricts the third mounting bracket 41 from rotating about the axis of the third rotation bolt 42 with respect to the first mounting bracket 10. A washer 436 is disposed between the head 421 of the third rotation bolt 42 and the first substrate 11.

  The washer 436 is fitted to the shaft portion 422 on the first mounting bracket 10 side so as not to rotate about the axis of the third rotation bolt 42.

As described above, the free joint 300 according to the third embodiment of the present invention is attached to the display device 2 serving as the first connection object, and the display device 2 and the first mounting bracket 10 serving as the first mounting member. A third mounting bracket 41 serving as a third mounting member disposed between the first mounting bracket 41 and a first mounting bracket which is mounted on the third mounting bracket 41 and perpendicular to the first rotating bolt 34 serving as the first rotating shaft member. The third rotation bolt 42 is a third rotation shaft member that is pivotally supported by the first rotation shaft 10, and the braking force is generated between the third rotation bolt 42 and the first mounting bracket 10. And a third braking member 43 that restricts the three mounting brackets 41 from rotating about the axis of the third rotating bolt 42 with respect to the first mounting bracket 10.
With such a configuration, the display device 2 serving as the first connection object is attached to the axis of the third rotation bolt 42 in addition to the two directions around the axis of the first rotation bolt 34 and the axis of the second rotation bolt 35. It is possible to configure the free joint 300 having a high degree of freedom in posture and being capable of maintaining the posture because the rotation of the display device 2 serving as the first connection object can be restricted while being able to turn around. Is possible.

  In the present embodiment, the third mounting bracket 41 is mounted on the first mounting bracket 10, but the present invention is not limited to this, and a fourth mounting member having substantially the same structure as the third mounting bracket 41 is mounted on the second mounting bracket. The structure attached to the bracket 20 may be sufficient. For example, a fourth attachment member that is attached to the second connection object and disposed between the second connection object and the second attachment member, and the fourth attachment member is pivotally supported by the second attachment member. A fourth rotating shaft member that generates a braking force between the fourth mounting member and the second mounting member, whereby the fourth mounting member rotates about the fourth rotating shaft member relative to the second mounting member. And a fourth braking member that restricts the rotation of the second braking member.

The top view which showed the universal joint which concerns on the 1st Example of the state which connected the display apparatus and the attachment member. The perspective view which showed the universal joint. The front view which showed the universal joint. The perspective view which showed the 1st attachment bracket. The perspective view which showed the 2nd mounting bracket. The perspective view which showed the connection bracket. FIG. 4 is a cross-sectional view taken along line A-A ′ in FIG. 3. FIG. 4 is a cross-sectional view along B-B ′ in FIG. 3. The perspective view which showed the 1st, 2nd rotation bolt and the 1st, 2nd braking member. The top view which showed the universal joint in the state which the 1st mounting bracket rotated. The side view which showed the universal joint of the state which the 2nd mounting bracket rotated. Sectional drawing which showed the free joint which concerns on 2nd Example. The top view which showed the free joint which concerns on a 3rd Example.

Explanation of symbols

2 Display device (first connected object)
3 Mounting member (second connection object)
10 First mounting bracket (first mounting member)
11 First board (first mounting part)
12 First side plate (first shaft support)
20 Second mounting bracket (second mounting member)
21 Second board (second mounting part)
22 Second side plate (second shaft support)
30 Connection bracket (connection member)
31 Substrate (center plate)
32 Long side plate (end plate)
33 Short side plate (end plate)
34 First rotation bolt (first rotation shaft member, first shaft piece)
35 Second turning bolt (second turning shaft member, second shaft piece)
36 First brake member 37 Second brake member 38 Second rotating shaft member 39 Torsion spring 41 Third mounting bracket (third mounting member)
42 Third rotation bolt (third rotation shaft member)
43 Third braking member 100 Universal joint 112 Notch 200 Free joint 300 Free joint 361 First corrugated washer (first biasing member)
362 First nut (first biasing force adjusting member)
371 Second corrugated washer (second biasing member)
372 Second nut (second biasing force adjusting member)
391 One end of torsion spring 392 The other end of torsion spring

Claims (13)

A universal joint for rotatably connecting the first connection object to the second connection object,
A first attachment member attached to the first connection object;
A second attachment member attached to the second connection object;
A connecting member that rotatably connects the first mounting member and the second mounting member;
The connecting member is
A first rotating shaft member pivotally supported by the first mounting member;
The second rotation shaft member that is orthogonal to the first rotation shaft member and is rotatably supported by the second mounting member;
By generating a braking force between the first rotating shaft member and the first mounting member, the first mounting member rotates about the axis of the first rotating shaft member with respect to the connecting member. A first braking member that regulates,
By generating a braking force between the second rotating shaft member and the second mounting member, the second mounting member rotates about the axis of the second rotating shaft member with respect to the connecting member. And a second braking member that regulates this. The first braking member is
A first biasing member that applies a biasing force in the axial direction of the first rotation shaft member;
A first biasing force adjusting member that adjusts the biasing force of the first biasing member,
The second braking member is
A second biasing member that applies a biasing force in the axial direction of the second rotating shaft member;
The universal joint according to claim 1, further comprising a second biasing force adjusting member that adjusts a biasing force of the second biasing member. The first biasing member is
A first spring washer or a first wave washer fitted to the first rotating shaft member;
The second biasing member is
The universal joint according to claim 1 or 2, wherein the universal joint is a second spring washer or a second corrugated washer fitted to the second rotating shaft member. The first mounting member is
A first attachment portion attached to the first connection object;
A pair of first shaft support portions that are provided at a predetermined interval in the first mounting portion and pivotally support both end portions of the first rotation shaft member;
The second mounting member is
A second attachment portion attached to the second connection object;
A pair of second shaft support portions that are provided at a predetermined interval in the second mounting portion and pivotally support both end portions of the second rotation shaft member;
An interval between the pair of first shaft support portions is larger than an interval between the pair of second shaft support portions,
The first mounting portion is formed with a notch for receiving the shaft end of the second rotating shaft member when the first mounting member rotates about the axis of the first rotating shaft member. The universal joint as described in any one of Claim 1- Claim 3.   The universal joint according to any one of claims 1 to 4, wherein the axis of the first rotation shaft member and the axis of the second rotation shaft member are arranged in the same plane. The connecting member is
The universal joint as described in any one of Claim 1-5 provided with the supporting member which supports said 1st rotating shaft member and said 2nd rotating shaft member. The shape of the support member is a cylindrical shape with one end opened and the other end closed,
The first rotating shaft member is composed of a pair of first shaft pieces,
The second rotating shaft member is composed of a pair of second shaft pieces,
The pair of first shaft pieces and the pair of second shaft pieces protrude from the outer peripheral surface of the support member,
The axes of the pair of first shaft pieces provided on the cylindrical peripheral surface of the support member are aligned with each other,
The universal joint according to claim 6, wherein the axes of the pair of second shaft pieces provided on the cylindrical peripheral surface of the support member are aligned with each other. The support member is
Starting from a substantially cross-shaped metal plate having a substantially square central plate and four end plates respectively extending from four pieces of the central plate,
The universal joint according to claim 7, wherein the four end plates of the metal plate are formed by bending substantially perpendicularly to the center plate at a boundary portion with the center plate. The shape of the support member is a cylindrical shape with both ends opened,
The first rotating shaft member is composed of a pair of first shaft pieces,
The second rotating shaft member is composed of a pair of second shaft pieces,
The pair of first shaft pieces and the pair of second shaft pieces protrude from the outer peripheral surface of the support member,
The axes of the pair of first shaft pieces provided on the cylindrical peripheral surface of the support member are aligned with each other,
The universal joint according to claim 6, wherein the axes of the pair of second shaft pieces provided on the cylindrical peripheral surface of the support member are aligned with each other.   The first torsion spring wound around the first rotation shaft member, having one end locked to the connecting member, and the other end locked to the first mounting member. The universal joint according to any one of 9 to 9.   The second torsion spring wound around the second rotating shaft member, having one end locked to the connecting member, and the other end locked to the second mounting member. The universal joint according to any one of 10 to 10. A third attachment member attached to the first connection object, and disposed between the first connection object and the first attachment member;
A third rotating shaft member that pivotally supports the third mounting member on the first mounting member;
By generating a braking force between the third mounting member and the first mounting member, the third mounting member rotates about the third rotation shaft member with respect to the first mounting member. The universal joint as described in any one of Claim 1- 11 provided with the 3rd braking member which regulates this. A fourth attachment member attached to the second connection object, and disposed between the second connection object and the second attachment member;
A fourth rotating shaft member that pivotally supports the fourth mounting member to the second mounting member;
By generating a braking force between the fourth mounting member and the second mounting member, the fourth mounting member rotates around the axis of the fourth rotating shaft member with respect to the second mounting member. A universal joint according to any one of claims 1 to 12, further comprising a fourth braking member that regulates this.

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