JP2001107943A - Ball joint and stand for monitor television using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ball joint and a stand for a monitor television having structure capable of restraining dislocation of a ball stud. SOLUTION: It is furnished with a body part 3 provided with an enclosing chamber 12 having an opening 3b, a ball stud 7 having a spherical part 9 enclosed in the enclosing chamber 12 free to slide and arranged and a shaft part 8 made integrally with this spherical part 9 and projected from the opening 3b and to slide and incline with the spherical part 9 in the enclosing chamber 12 as a fulcrum, a base material 4 arranged to face against the body part 3 with the spherical part 9 in the enclosing chamber 12 between them and a screw ring member 6 free to adjust holding force to sandwich the spherical body 9 with the body part 3 and the base material 4 when the screw is tightened, and a shape of the spherical part 9 is formed of a non-spherical curved surface the radius of which becomes larger as it advances in the direction not to easily rotate the ball stud 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball joint and a monitor television stand suitable for use in an apparatus for disposing a monitor television or the like on a dashboard of an automobile, for example.

[0002]

2. Description of the Related Art As a monitor television stand for holding a monitor television arranged on a dashboard of an automobile in a position-adjustable manner, for example, a configuration shown in FIG. 4 is known. The monitor television stand 51 shown in FIG. 4 uses a ball joint 52. The ball joint 5
Reference numeral 2 denotes a substantially cylindrical body portion incorporated in the monitor television stand 51 and having an insertion port 53a opened at one end.
A base member 54 for closing the insertion opening 53a is attached to the housing 3, and a substantially cylindrical housing 55 with a bottom that forms a storage chamber 62 therein, and the body 55 of the housing 55 and the base member 54 are fixed. And a ball stud 57.

In more detail, the ball stud 57
Has a shaft portion 58 and a spherical portion 59 having an outer diameter larger than the outer diameter of the shaft portion 58 and provided at one end of the shaft portion 58. The spherical portion 59 here
Is made as a true circular sphere. In this example, a support plate 61 is attached to the other end of the shaft portion 58 as a monitor television mounting portion to which the monitor television 60 is attached. The support plate 61 is made separately from the ball stud 57 and is attached to the ball stud 57 later.

[0004] In the upper part of the body 53, an opening 53b is formed.
Are formed. The inner diameter of the opening 53b is smaller than the outer diameter of the ball stud 57.
8 is formed larger than the maximum outer diameter. Therefore, the shaft portion 58 of the ball stud 57 is inserted from the insertion port 53a.
Is inserted until the spherical body portion 59 comes into contact with the peripheral edge (the bottomed portion) of the opening 53b and can be turned at that position.
Further, at the position where the slit 63 is provided, the shaft portion 58 enters the slit 63 and has a structure in which the shaft portion 58 can be largely inclined in the vertical direction. Further, a flange portion 53c is formed on a lower outer peripheral portion of the body portion 53.

The base member 54 has a low-profile cylindrical shaft shape, and has an outer diameter slightly larger than the outer diameter of the flange 53c of the body 53, and has an external thread formed on its outer periphery. I have. On the upper surface side, the body 53
A protrusion 54a is formed integrally with the ball stud 57 to be in contact with the ball portion 59 of the ball stud 57 and to hold the ball portion 59 slidably in the containing chamber 62. In addition,
In this example, since the ball joint 52 is used as the monitor television stand 51, a base fixing plate 66 is fixed to the lower surface of the base member 54 by a screw (not shown) to fix the base member 54 on the dashboard 65 of the automobile. Installed with.

The screw ring member 56 has a base member 5 on its inner surface.
A female screw to be screwed with the male screw of No. 4 is formed, and an upper portion is provided with an opening 64 and a part of the shape is narrowed. The inner diameter of the opening 64 is determined by the body 5
3 and smaller than the outer diameter of the flange 53c. Further, on the outer periphery of the screw ring member 56, a projection 56a for hanging a finger when rotating the screw ring member 56 is integrally formed. The screw ring member 56 is connected to the body 5
After the ball stud 57 and the base member 54 are combined, the ball stud 57 and the body 5
3 is inserted in order until the flange 53c abuts on the inner surface of the upper end of the screw ring member 56, and the female screw is screwed into the male screw of the base member 54. Spherical part 59 of ball stud 57
Can be fixed in a tightened state. In addition, when the tightening amount of the screw ring member 56 is increased, the sphere 5
The tightening force between the base member 54 containing the body 9 and the body 53 increases, and when the strength decreases, the tightening force decreases. Therefore, the tightening force can be adjusted by adjusting the amount of tightening.

[0007] The ball joint 5 thus configured
In the monitor television stand 51 using the base 2, the base fixing plate 66 is mounted on the dashboard 65 of the automobile using a double-sided adhesive or the like. The monitor TV 60 is mounted on the support plate 61 of the monitor TV stand 51 mounted on the dashboard 65 in this manner. When changing the position of the monitor television 60 arranged on the support plate 61, first, the tightening of the screw ring 56 is loosened. Then, the body 53 can be horizontally turned around the axis 67 together with the ball stud 57, and the ball stud 57 can be rotated in the vertical direction (the direction indicated by an arrow 69 in FIG. 4) within the slit 63. The horizontal turning and the vertical movement can adjust the position and orientation of the monitor television 60 according to the convenience of the driver or the like. After the adjustment, when the screw ring 56 is tightened, the body 53 and the ball stud 57 are fixed, and the adjusted position can be fixed.

[0008]

However, in the monitor television stand 51 using the above-mentioned conventional ball joint 52, the spherical portion 59 made of a perfect circular spherical surface is screwed by the screw ring 56 to the body portion 53. The structure is such that the position in the vertical direction is restricted only by tightening with the base member 54. For this reason, if the screw ring 56 is not sufficiently fastened, the load on the monitor television 60 and the ball stud 57 may cause the ball portion 59 to slip and the entire ball stud 57 to rotate downward, thus causing a displacement. . Also, particularly when used as an in-vehicle monitor television stand or the like, the vibration applied to the monitor television 60 acts as a large force on the sphere portion 59, and the displacement of the ball stud 57 causes the displacement of the ball stud 57, especially the load (gravity). ) Tends to occur in the direction in which 加) is added.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a ball joint having a structure capable of suppressing the displacement of a ball stud.

Another object of the present invention is to provide a monitor television stand having a structure capable of holding a monitor television at an adjusted desired position while suppressing the displacement of a ball stud.

[0011]

According to a first aspect of the present invention, there is provided a ball joint having a body provided with a housing having an opening, and a body slidably housed in the housing of the body. A sphere portion disposed and a shaft portion integrated with the sphere portion and provided to protrude from the opening,
A ball stud that tilts with the sliding with the sphere portion held in the containment chamber as a fulcrum, and a base material that is arranged to face the body portion with the sphere portion of the ball stud interposed therebetween, Holding force adjusting means, which is screw-coupled to the base material with the body portion interposed therebetween, and is capable of adjusting a force holding the sphere portion between the body portion and the base material when the screw is tightened; And a configuration in which the outer shape of the spherical portion is formed by a non-spherical curved surface. With this configuration, since the outer shape of the spherical portion of the ball stud is formed as a non-spherical curved surface, when the ball stud is tilted, the ball stud is tilted by rotating in a direction in which the distance (radius) from the center of the spherical portion increases. A time and a time when the sphere portion is tilted by rotating in the direction in which the radius of the sphere portion becomes smaller are created. And when rotating in the direction in which the radius of the sphere portion is increased and tilted, it cannot be rotated unless a large force is applied compared to the case where the sphere portion is tilted in the direction in which the radius of the sphere portion is reduced, Taking advantage of this difference in operation, if the ball studs are arranged so that the radius of the ball is large in the direction in which the ball studs do not easily rotate, the holding force will increase and stable holding will be performed. You can do it.

[0012] According to a second aspect of the present invention, in the ball joint according to the first aspect, the non-spherical curved surface of the sphere portion has a radial dimension with respect to a tightening direction gradually as the shaft portion falls down in the direction of gravity. It is configured such that it has a curved surface that becomes larger. With this configuration, the holding force of the shaft portion in the direction of gravity can be increased as compared with the holding force when the shaft portion is tilted in another direction.

According to a third aspect of the present invention, there is provided a monitor television stand comprising: a body provided with an enclosure having an opening; and a body slidably disposed in the enclosure of the body. A spherical part which is formed integrally with the spherical part and protrudes from the opening, and has a shaft part provided with a monitor television mounting part to which a monitor television is mounted at the distal end side, and is held in the enclosure. A ball stud for adjusting the position of the monitor television by tilting together with the monitor television mounting portion with the sliding with the spherical portion as a fulcrum, and the body sandwiching the spherical portion of the ball stud. A base member disposed opposite to the base portion, and screwed to the base material with the body portion interposed therebetween, and when the screw is tightened, the body portion and the base material hold the spherical body portion therebetween. Together comprising an adjustable holding force adjusting means is obtained by the formation and comprising form the outer shape of the spherical portion in a non-spherical curved surface. With this configuration, since the outer shape of the spherical portion of the ball stud is formed as a non-spherical curved surface, when the ball stud is tilted, the ball stud is tilted by rotating in a direction in which the distance (radius) from the center of the spherical portion increases. A time and a time when the sphere portion is tilted by rotating in the direction in which the radius of the sphere portion becomes smaller are created. And when rotating in the direction in which the radius of the sphere portion is increased and tilted, it cannot be rotated unless a large force is applied compared to the case where the sphere portion is tilted in the direction in which the radius of the sphere portion is reduced, Taking advantage of this difference in operation, if the ball studs are arranged so that the radius of the sphere increases in the direction in which the ball studs do not easily rotate with the monitor TV, the holding power increases and the monitor TV stabilizes. That is, it is possible to perform the holding.

According to a fourth aspect of the present invention, there is provided a ball joint provided with a housing having an opening,
A sphere part slidably contained in the body chamber of the body part and a shaft part integrally formed with the sphere part and protruding from the opening and held in the body chamber; A ball stud which is tilted with the sliding with the sphere portion as a fulcrum, a base material which is arranged to face the body portion with the sphere portion of the ball stud interposed therebetween, and a ball member which sandwiches the body portion. And a holding force adjusting means capable of adjusting a force holding the sphere portion between the body portion and the base material when the screw is tightened, and the sphere member The outer shape of the portion is provided with a plurality of protrusions that are engaged with the body portion or the base material on the fixed side. With this configuration, when the ball stud is disposed at a position where the projection is in contact with the body portion or the base material, the ball stud cannot be rotated unless further large force is applied to rotate it further. Therefore, if the ball stud is provided with a projection in a direction in which the ball stud is not easily rotated, the holding force of the ball stud is strengthened and stable holding can be performed.

According to a fifth aspect of the present invention, in the ball joint according to the fourth aspect, a projection of the spherical portion is provided in the spherical portion so as to be able to advance and retreat by expansion and contraction of a spring. It is. By using a spring having a different spring force with this configuration, the holding force of the projection can be easily changed depending on the model or the like.

According to a sixth aspect of the present invention, in the ball joint according to the fourth aspect, accurate positioning can be performed accurately and reliably by positioning the ball joint in the recess.

According to a seventh aspect of the present invention, there is provided a monitor television stand, comprising: a body provided with a housing chamber having an opening; and a body slidably housed in the housing chamber of the body. A spherical part which is formed integrally with the spherical part and protrudes from the opening, and has a shaft part provided with a monitor television mounting part to which a monitor television is mounted at the distal end side, and is held in the enclosure. A ball stud for adjusting the position of the monitor television by tilting together with the monitor television mounting portion with the sliding with the spherical portion as a fulcrum, and the body sandwiching the spherical portion of the ball stud. A base member disposed opposite to the base portion, and screwed to the base material with the body portion interposed therebetween, and when the screw is tightened, the body portion and the base material hold the spherical body portion therebetween. And a plurality of protrusions that are in contact with the fixed body portion or the base material and provided on the outer peripheral surface of the spherical body portion. is there. With this configuration,
When the ball stud is disposed at a position where the projection abuts on the body portion or the base material, the ball stud cannot be rotated unless further greater force is applied to rotate it further.
Therefore, if the ball stud is provided with a projection in a direction in which the ball stud is not easily rotated, the holding force of the ball stud is increased and the monitor television can be stably held.

[0018]

(Embodiment 1) Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a monitor television stand according to a first embodiment of the present invention. FIG. 1 is a schematic external perspective view of the stand, and FIG. 2 is a schematic longitudinal sectional view of the stand.
The monitor television stand according to the present embodiment is an example of a monitor television stand arranged on a dashboard of an automobile.

1 and 2, the monitor television stand 1 according to the present embodiment has a structure in which the position and orientation of the mounted monitor television 10 can be easily adjusted using the ball joint 2. Ball joint 2 incorporated in the monitor television stand 1
Is a substantially cylindrical body 3 having an insertion opening 3a at one end.
A base member 4 for closing the insertion opening 3a is attached thereto, and a substantially cylindrical housing 5 with a bottom that forms a storage chamber 12 therein, and a screw for fixing between the body 3 of the housing 5 and the base member 4 It is composed of a ring member 6 and a ball stud 7.

More specifically, the ball stud 7 includes:
It has a shaft portion 8 and a spherical portion 9 having an outer diameter larger than the outer diameter of the shaft portion 8 and provided at one end of the shaft portion 8. As shown in FIG. 2, the spherical portion 9 is formed as a sphere having an elliptical non-circular spherical surface, instead of a true circular sphere. That is, in the structure of the present embodiment, the radius r from the center O to the outer surface gradually increases in the direction in which the own weight W of the ball stud 7 is applied, and is shifted by 90 degrees with respect to the center line 20 of the ball stud 7. The position is the vertex 21, and it is formed so as to become smaller again beyond the vertex. Further, in the structure example of the present embodiment, the monitor TV 10 is connected to the other end of the shaft 8.
The support plate 11 is attached as a monitor television mounting portion for mounting the. The support plate 11 is made separately from the ball stud 7 and is attached to the ball stud 7 later.

In the upper part of the body 3, an opening 3b and a slit 13 are formed continuously from the opening 3b toward the lower part. The inner diameter of the opening 3 b is smaller than the outer diameter of the ball stud 7 and larger than the maximum outer diameter of the shaft 8. Therefore, the insertion opening 3a
When the shaft portion 8 of the ball stud 7 is inserted from above, the sphere portion 5 is inserted until it comes into contact with the peripheral edge (the bottomed portion) of the opening 3b and can be turned at that position, and at the position where the slit 13 is provided, The structure is such that the portion 8 enters the slit 13 and can be tilted more vertically. Further, a flange portion 3c is formed on a lower outer peripheral portion of the body portion 3.

The base member 4 has a low-profile cylindrical shaft shape, and has an outer diameter slightly larger than the outer diameter of the flange portion 3c of the body portion 3, and is formed with an external thread on its outer periphery. I have. Also, on the upper surface side, a protrusion 4 is inserted into the body 3 from the insertion opening 3 a and abuts against the sphere 9 of the ball stud 7 to hold the sphere 9 slidably in the storage chamber 12.
a is formed integrally. In this embodiment, since the ball joint 2 is used as the monitor television stand 1, a base fixing plate 16 is provided on the lower surface of the base material 4 to fix the base material 4 to the dashboard 15 of the automobile. It is attached with screws (not shown).

The screw ring member 6 constitutes a holding force adjusting means. The screw ring member 6 has a female screw which is screwed with the male screw of the base member 4 on the inner surface, and an opening 14 is provided at the upper part to narrow a part. It is made in a substantially cylindrical shape with a bottom. The inner diameter of the opening 14 is larger than the outer diameter of the body 3 and smaller than the outer diameter of the flange 3c. Further, on the outer periphery of the screw ring member 6,
A projection 6a for hanging a finger when rotating the screw ring member 6 is integrally formed. Then, after the body 3, the ball stud 7, and the base member 4 are combined, the screw ring member 6 passes the ball stud 7 and the body 3 sequentially through the opening 14 from above the ball stud 7, The flange 3c is inserted until it comes into contact with the inner surface of the upper end of the screw ring member 6, and the female screw is
Can be fixed between the body portion 3 and the base member 4 while the ball portion 9 of the ball stud 7 is tightened. In addition, when the tightening amount of the screw ring member 6 is increased, the tightening force between the base member 4 containing the spherical body portion 9 and the body portion 3 is increased, and conversely, when the tightening amount is reduced, the tightening force is reduced. Therefore, by adjusting the tightening force, the tightening force can be adjusted.

The ball joint 2 thus configured
In the monitor television stand 1 using the base, the base fixing plate 16 is mounted on the dashboard 15 of the automobile using a double-sided adhesive or the like, and further, the support plate 11 of the monitor television stand 1 mounted on the dashboard 15 is used.
A monitor television 10 is mounted on the upper side. When the position of the monitor television 10 arranged on the support plate 11 is changed, first, the tightening of the screw ring 6 is loosened. Then, the torso part 3 can be turned horizontally together with the ball stud 7 about the axis 18 and the ball stud 7 is moved vertically in the slit 13 (arrow 19 in FIG. 2).
The direction and direction of the monitor television 10 can be adjusted in accordance with the convenience of the driver or the like by the horizontal turning and the vertical tilt. Further, after the adjustment and positioning, when the screw ring 6 is tightened, the adjusted state can be fixed.
Further, in this structure, the spherical portion 9 is not a true circular sphere but a sphere having an elliptical non-circular spherical surface, and the radius r from the center O to the outer surface is the direction in which the own weight W of the ball stud 7 is applied. The position of the vertex 2 is shifted gradually by 90 degrees with respect to the center line 20 of the ball stud 7.
Since the spherical portion 9 is formed so as to be 1, when the ball stud 7 tries to rotate downward (in the direction in which its own weight is applied) under the weight of the television monitor 10, the radius r of the spherical portion 9 is reduced. The growing portion comes into contact with the upper surface of the base member 4 more strongly, and the rotation is forcibly prevented by this contact. Thereby, the ball stud 7
Can be prevented from rotating easily with the monitor television 10.

Therefore, in the structure of the first embodiment, when the ball stud 7 is tilted by rotating in a direction in which the distance (radius r) from the center of the spherical body portion 9 becomes large, the ball stud 7 is reversed. The term “when the radius r of the sphere portion 9 is rotated in the direction in which the radius r is reduced” indicates the direction in which the radius r of the sphere portion 9 is increased, that is, when the sphere portion 9 is rotated downward and tilted in the structure of the present embodiment. Since rotation cannot be performed unless a large force is applied, downward rotation is more firmly stopped. Thus, rotation in the direction in which the ball stud 7 cannot easily rotate, that is, rotation in the downward direction in the structure of the present embodiment is suppressed, and stable holding can be performed.

In the structure of the first embodiment, the structure in which the ball joint 2 is used for the monitor TV stand 1 is disclosed.
It can be widely used as a general ball joint 2. In addition, the shape of the aspherical surface of the spherical portion 9 is set to a radius r with respect to the direction in which the ball joint 2 rotates downward.
Is disclosed so as to gradually increase. However, for example, when it is desired to more firmly suppress the rotation in the left-right direction, the radius r is formed so as to gradually increase with respect to the rotation in the left-right direction. By doing so, the purpose can be achieved.

(Embodiment 2) Next, a stand for a monitor television arranged on a dashboard of an automobile according to a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a schematic vertical sectional view of the monitor television stand according to the present embodiment. Portions corresponding to the monitor television stand according to the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals and described.

In FIG. 3, a monitor television stand 1 according to the present embodiment
The position and the direction of the ball joint 2 can be easily adjusted using the ball joint 2. The ball joint 2 incorporated in the monitor television stand 1 has a substantially cylindrical body 3 having an insertion opening 3a at one end, and a base material 4 for closing the insertion opening 3a attached thereto. The housing 5 includes a substantially cylindrical housing 5 having a bottom, which forms a chamber 12, a screw ring member 6 for fixing the body 5 of the housing 5 to the base member 4, and a ball stud 7.

More specifically, the ball stud 7 is
It has a shaft portion 8 and a spherical portion 9 having an outer diameter larger than the outer diameter of the shaft portion 8 and provided at one end of the shaft portion 8. As shown in FIG. 3, the spherical portion 9 here is a perfect circular sphere, and has a structure in which a plurality of projections 22 are provided on the outer surface. Further, the projection 22 has a structure that can advance and retreat from the outer surface of the spherical body 9. The structure of the projection 22 will be further described. The projection 22 is formed as a pin-shaped member having a hemispherical tip, and this is a hole 2 having an opening on the outer surface of the spherical body 9.
3 are slidably disposed with the hemisphere facing outward.
Further, when housed in the hole 23, the projection 22 is integrated with the coil spring 24, which is inserted with the coil spring 24 first, and is retained in the hole 23. The projection 22 inserted into the hole 23 is held with the hemispherical portion protruding from the surface of the spherical body portion 9. When a force is applied from the outside to the inside, the coil spring 24 is compressed. It is structured so that it can escape into the sphere 9. Further, in the structural example of the present embodiment, a support plate 11 as a monitor TV mounting portion for mounting the monitor TV 10 is mounted on the other end side of the shaft portion 8. The support plate 11 is made separately from the ball stud 7 and is attached to the ball stud 7 later.

In the upper part of the body 3, an opening 3b and a slit 13 are formed continuously from the opening 3b toward the lower part. The inner diameter of the opening 3 b is smaller than the outer diameter of the ball stud 7 and larger than the maximum outer diameter of the shaft 8. Therefore, the insertion opening 3a
When the shaft portion 8 of the ball stud 7 is inserted from above, the sphere portion 5 is inserted until it comes into contact with the peripheral edge (the bottomed portion) of the opening 3b and can be turned at that position, and at the position where the slit 13 is provided, The structure is such that the portion 8 enters the slit 13 and can be tilted more vertically. Further, a flange portion 3c is formed on a lower outer peripheral portion of the body portion 3.

The base member 4 has a low-profile cylindrical shaft shape, and has an outer diameter slightly larger than the outer diameter of the flange portion 3c of the body portion 3, and has an external thread formed on its outer periphery. I have. Also, on the upper surface side, a protrusion 4 is inserted into the body 3 from the insertion opening 3 a and abuts against the sphere 9 of the ball stud 7 to hold the sphere 9 slidably in the storage chamber 12.
a is formed integrally. Further, a recess 25 is formed on the upper surface of the protruding portion 4a for receiving the projection 22 of the ball portion 9 of the ball stud 7. The entire bottom surface of the recess 25 is formed as a concave curved surface, and assists the protrusion 22 to advance and retreat when the sphere 9 rotates. In this embodiment, since the ball joint 2 is used as the monitor television stand 1, a base fixing plate 16 is provided on the lower surface of the base material 4 to fix the base material 4 to the dashboard 15 of the automobile. It is attached with screws (not shown).

The screw ring member 6 constitutes a holding force adjusting means. The screw ring member 6 has an internal surface formed with a female screw to be screwed with the male screw of the base member 4, and an opening 14 is provided at the upper portion to narrow down a part. It is made in a substantially cylindrical shape with a bottom. The inner diameter of the opening 14 is larger than the outer diameter of the body 3 and smaller than the outer diameter of the flange 3c. In addition, a projection 6a for hanging a finger when rotating the screw ring member 6 is integrally formed on the outer periphery of the screw ring member 6. Then, after the body 3, the ball stud 7, and the base member 4 are combined, the screw ring member 6 passes the ball stud 7 and the body 3 sequentially through the opening 14 from above the ball stud 7, When the female screw is screwed into the male screw of the base member 4 while the flange portion 3c is inserted until the flange portion 3c comes into contact with the inner surface of the upper end of the screw ring member 6, the ball portion 9 of the ball stud 7 moves between the body portion 3 and the base member 4. Can be fixed in a tightened state. In addition, when the tightening amount of the screw ring member 6 is increased, the tightening force between the base member 4 containing the spherical body portion 9 and the body portion 3 is increased, and conversely, when the tightening amount is reduced, the tightening force is reduced. Therefore, by adjusting the tightening force, the tightening force can be adjusted.

The ball joint 2 thus configured
In the monitor television stand 1 using the base, the base fixing plate 16 is mounted on the dashboard 15 of the automobile using a double-sided adhesive or the like, and further, the support plate 11 of the monitor television stand 1 mounted on the dashboard 15 is used.
A monitor television 10 is mounted on the upper side. When the position of the monitor television 10 arranged on the support plate 11 is changed, first, the tightening of the screw ring 6 is loosened. Then, the torso 3 can be turned horizontally together with the ball stud 7 about the axis 18 and the ball stud 7 is moved vertically in the slit 13 (arrow 19 in FIG. 3).
The direction and direction of the monitor television 10 can be adjusted in accordance with the convenience of the driver or the like by the horizontal turning and the tilting in the vertical direction. At the position where it falls into the recess 25 of the material 4,
Tighten the screw ring 6. Then, the adjusted state can be fixed. When the projections 22 are dropped into the recesses 25 in this way, when the spherical body 9 is to be rotated, the engagement between the projections 22 and the recesses 25 becomes a load, and Since it must be rotated with a larger force than when it is not
Great holding power is obtained. Therefore, this force forcibly stops the ball stud 7 from rotating downward (in the direction in which the weight W is applied), and prevents the ball stud 7 from rotating easily together with the monitor television 10 downward. be able to.

Therefore, in the structure according to the second embodiment, when the spherical body 9 attempts to rotate, the contact between the projection 22 and the recess 25 (the base member 4) acts as a rotational load force, This acts as a force for stopping the rotation after the adjustment, thereby increasing the holding force of the ball stud 7. In addition, the positioning can be reliably performed at the position determined by the engagement between the projection 22 and the recess 25. Further, the protrusion 22
With the coil spring 24 in the recess 25,
Since the spring force of the coil spring 24 protrudes from the outer surface of the spherical body 9, the coil spring 2 having a different spring force is used.
By using 4, it is possible to easily adjust the strength of the holding force.

The structure of the second embodiment may be implemented as follows. The ball joint 2 is not limited to the monitor television stand 1 and may be used as a general ball joint 2. -The number of the protrusions 22 of the spherical portion 9 may be any number. Although the structure in which the recess 25 is formed on the upper surface of the base member 4 is disclosed, a structure in which the recess 25 is formed on the inner surface of the body 3 may be used. The recess 25 may be formed in the spherical body 9 on the ball stud 7 side, and the protrusion 22 and the coil spring 24 may be provided on the upper surface of the base member 4 or the inner surface of the body 3.

[0036]

As described above, the ball joint according to the present invention, as apparent from the above embodiment,
In the direction in which the ball studs do not easily rotate, the holding force is strengthened by placing the ball studs so that the radius of the sphere becomes large, making it difficult to rotate the ball joint. The posture of the ball joint after the adjustment can be stably held.

Further, a projection is provided in a direction in which the ball stud is not easily rotated, and the rotation of the ball stud is made difficult by the projection. It can be carried out.

Furthermore, in the monitor television stand according to the present invention using the ball joint configured as described above, the adjusted television position can be stably held without shifting.

[Brief description of the drawings]

FIG. 1 is a schematic vertical sectional side view of a monitor television stand according to a first embodiment of the present invention.

FIG. 2 is an external perspective view of a monitor television stand according to the first embodiment.

FIG. 3 is a schematic longitudinal sectional side view of a monitor television stand according to a second embodiment of the present invention.

FIG. 4 is a structural explanatory view of a conventional monitor TV stand.

[Explanation of symbols]

 Reference Signs List 1 monitor TV stand 2 ball joint 3 body 3a insertion opening 3b opening 3c flange 4 base material 4a protrusion 5 housing 6 screw ring member 7 ball stud 8 shaft 9 sphere 10 monitor TV 11 support plate (monitor TV mounting) 12) Enclosure chamber 13 Slit 14 Opening 15 Dashboard 16 Base fixing plate 18 Axis 19 Arrow 20 Center line 21 Apex 22 Projection 23 Hole 24 Coil spring 25 Concave r Radius O Center

Claims (7)

[Claims] 1. A body provided with a housing chamber having an opening, a sphere slidably housed in the housing chamber of the body, and a body integral with the sphere and protruding from the opening. A ball stud having a shaft portion provided at a predetermined position, the ball stud tilting with the sliding with the sphere portion held in the enclosure as a fulcrum, and the body sandwiching the sphere portion of the ball stud. A base member disposed to face the portion, and being screw-coupled to the base member with the body portion interposed therebetween, and tightening the screw to hold the body portion between the body portion and the base material. A ball joint comprising: a holding force adjusting means capable of adjusting a force; and an outer shape of the sphere portion formed by a non-spherical curved surface. 2. The non-spherical curved surface of the spherical portion is formed so as to have a curved surface whose radius in a tightening direction gradually increases as the shaft portion falls down in the direction of gravity. Ball joint as described. 3. A body provided with a housing chamber having an opening, a sphere slidably contained in the housing chamber of the body, and the opening formed integrally with the sphere. Has a shaft portion provided with a monitor TV mounting portion to which a monitor TV is mounted on the distal end side thereof,
A ball stud for adjusting the position of the monitor television by tilting together with the monitor television mounting portion with the sliding around the sphere portion held in the containment chamber as a fulcrum; and the sphere portion of the ball stud A base member disposed opposite to the body portion with the body portion interposed therebetween; and a screw member connected to the base material portion with the body portion interposed therebetween. When the screw is tightened, the ball portion is sandwiched between the body portion and the base material. And a holding force adjusting means capable of adjusting the holding force of the monitor, and the outer shape of the spherical portion is formed as a non-spherical curved surface. 4. A body provided with a housing chamber having an opening, a sphere slidably housed in the housing chamber of the body, and the opening formed integrally with the sphere. A ball stud having a shaft protruding from the ball stud which tilts with the sliding with the sphere held in the enclosure as a fulcrum; and a ball stud sandwiching the sphere of the ball stud. A base member opposed to the body portion, and being screw-coupled to the base material with the body portion interposed therebetween, and tightening the screw to hold the body portion and the base material with the sphere portion interposed therebetween; And a holding force adjusting means capable of adjusting a force applied to the ball, and a projection provided on the outer shape of the spherical body so as to be in contact with the fixed body or the base material. Joint. 5. The ball joint according to claim 4, wherein the projection of the spherical portion is provided in the spherical portion so as to be able to advance and retreat by expansion and contraction of a spring. 6. A ball joint, wherein a recess is provided on the base side for releasably positioning and locking the projection of the spherical body. 7. A body provided with a housing chamber having an opening, a sphere slidably contained in the housing chamber of the body, and the opening formed integrally with the sphere. Has a shaft portion provided with a monitor TV mounting portion to which a monitor TV is mounted on the distal end side thereof,
A ball stud for adjusting the position of the monitor television by tilting together with the monitor television mounting portion with the sliding around the sphere portion held in the containment chamber as a fulcrum; and the sphere portion of the ball stud A base member disposed opposite to the body portion with the body portion interposed therebetween; and a screw member connected to the base material portion with the body portion interposed therebetween. When the screw is tightened, the ball portion is sandwiched between the body portion and the base material. And a holding force adjusting means capable of adjusting the holding force, and a projection that is brought into contact with the body portion or the base material on the fixed side is provided on the outer peripheral surface of the spherical body portion. Characteristic monitor TV stand.