JP6382072B2 - Free lock joint - Google Patents

Description

  The present invention relates to a free lock joint that is used, for example, to install devices such as lighting, a television, and a camera on a desk, a table, and a floor so that the position can be adjusted, and to connect various members so that the angle can be adjusted.

  For example, when using equipment such as lighting, TV, and camera on a desk, table, or floor, it is necessary to adjust the installation position, and various types of adjustment mechanisms have been proposed. The one used is proposed.

  For example, Patent Document 1 discloses a projector having a position adjustment mechanism using a ball joint. In this patent document 1, the purpose is to adjust the position of a device when the device is placed on a table or the like via two support plates, and the legs extending from each support plate are opened to open the device. Position adjustment is possible. A spherical ball joint that is rotatably fixed to the inside of the device via a fixing portion is connected to the tip of each leg portion. An adjusting lever is connected to the fixing lever of the fixing portion, and the fixing lever is operated by operating the adjusting lever. The fixed lever cooperates with the ball presser located at the upper part of the ball joint. When the fixed lever operates, the ball presser rotates around the support pin, and the ball joint stored in the fixed part is fixed by the ball presser. As a result, the ball joint becomes non-rotatable and the position of the device is fixed.

JP 2008-160595 A

  However, in the position adjustment mechanism as described in Patent Document 1 described above, since the ball joint is fixed in the device, it can be used only for the device. Moreover, since the adjustment lever, the fixing lever, the ball presser and the like are used to fix the ball joint in a non-rotatable manner, there is a problem that the structure is complicated and the manufacturing cost is high.

  The present invention has been made paying attention to the above-described problems, and an object of the present invention is to provide a free lock joint that has a simple structure and that can be easily adjusted in position. Moreover, it aims at providing the free lock joint which can connect various members so that angle adjustment is possible.

  The object of the present invention is to provide a ball stud provided with a shaft portion provided so that at least a part of the outer peripheral surface protrudes from the spherical head portion and the head portion, and an opening formed at one end with a smaller diameter than the head portion. A cylindrical socket that rotatably holds the head portion with the shaft portion protruding from the opening; a support member provided in the socket so as to contact the head portion; A movable member provided to be slidable in the axial direction, a spring disposed between the support member and the movable member, and a base member attached to the other end of the socket by screw coupling with the socket; The base member includes a push-in member that pushes and slides the movable member by screwing the socket, and the support member includes a sliding member of the movable member. The spring pressure of the spring to be compressed due to the by acting, are achieved by a free lock joint for pressing said head portion in the socket.

  In the free lock joint configured as described above, the movable member is provided with a pressing member around which the spring made of a coil spring is provided, and the pressing member presses the support member as the movable member slides. Is preferred.

  Moreover, it is preferable that the said socket has a bottom face part which has a through-hole in the other end, and the said pushing member is penetrated by the said through-hole.

  Moreover, it is preferable that the pushing member has an external thread formed on the outer peripheral surface, and the through hole has an internal thread formed on the inner peripheral surface to be screwed with the male screw.

  Further, it is preferable that a hexagonal holding part in a plan view is provided on the outer peripheral surface of the socket so as to protrude from the outer peripheral surface.

  Moreover, it is preferable that the said supporting member is formed with the hollow part dented along the spherical surface of the outer peripheral surface of the said head part.

  According to the free lock joint of the present invention, the structure is simple, the position of the device can be easily adjusted, and various members can be easily fixed in any direction.

It is a side view of the free lock joint concerning one embodiment of the present invention. It is a top view of FIG. It is a bottom view of FIG. It is sectional drawing of FIG. It is a side view of the state which installed the apparatus using the free lock joint. It is a side view of a ball stud. FIG. 7 is a plan view of FIG. 6. FIG. 7 is a bottom view of FIG. 6. It is a side view of the trunk | drum which comprises a socket. FIG. 10 is a plan view of FIG. 9. FIG. 10 is a bottom view of FIG. 9. FIG. 10 is a cross-sectional view of FIG. 9. It is a side view of the cover part which comprises a socket. FIG. 14 is a plan view of FIG. 13. FIG. 14 is a bottom view of FIG. 13. It is sectional drawing of FIG. It is a side view of a supporting member. It is a top view of FIG. It is a bottom view of FIG. It is sectional drawing of FIG. It is a side view of a movable member. It is a top view of FIG. It is a bottom view of FIG. It is a side view of a base member. It is a top view of FIG. It is a bottom view of FIG. It is sectional drawing of FIG. It is sectional drawing which shows operation | movement of a free lock joint. It is sectional drawing which shows operation | movement of a free lock joint. It is sectional drawing which shows operation | movement of a free lock joint.

  Hereinafter, actual forms of the present invention will be described with reference to the accompanying drawings. 1 to 3 show an external configuration of a free lock joint 1 according to an embodiment of the present invention, and FIG. 4 shows an internal configuration of the free lock joint 1.

  As shown in FIG. 5, the free lock joint 1 is configured such that, for example, a device M such as an illumination, a television, or a camera can be installed on a desk, a table, or a floor so that the position of the device M can be adjusted, and the angle between various members S can be adjusted. It is used to connect.

  As shown in FIGS. 1 to 4, the free lock joint 1 includes a ball stud 2, a cylindrical socket 3, and a support member 4 provided in the socket 3 so as to contact the head portion 20 of the ball stud 2, A movable member 5 slidably provided in the socket 3 in the axial direction, a spring 6 disposed between the support member 4 and the movable member 5 in the socket 3, and the other end (lower end in the drawing) side of the socket 3 And a base member 7 to be mounted. Furthermore, the free lock joint 1 includes a dust cover 8.

  As shown in FIGS. 6 to 8, the ball stud 2 is made of a metal material such as non-ferrous metal in addition to iron or steel, and is provided so as to protrude from the substantially spherical head portion 20 and the head portion 20. The shaft part 21 is provided. The shaft portion 21 is a portion to which equipment and various members are mounted. In this embodiment, the shaft portion 21 is formed in a round bar shape, and a distal end portion (a portion opposite to the head portion 20) is formed with a male screw on the outer peripheral surface. The bolt portion 22 is formed. A flange 23 is provided between the bolt portion 22 and the head portion 20 of the shaft portion 21.

  The head portion 20 is formed in a spherical shape in which at least a part of the outer peripheral surface is curved in an arc shape in a cross-sectional view, and the spherical portion rolls smoothly in the socket 3 so that it can rotate. ing. Further, the head portion 20 has a flat top surface on the opposite side to the side to which the shaft portion 21 is connected.

  As shown in FIGS. 1 to 4, the socket 3 is a substantially cylindrical member having an opening 30 formed at one end in the axial direction (the upper end in the drawing), and is made of a metal material such as non-ferrous metal in addition to iron or steel. Is formed. The inner peripheral surface on one end side of the socket 3 is provided with a projecting portion 31 projecting inward, and the diameter of the opening 30 of the socket 3 is smaller than the diameter of the head portion 20 of the ball stud 2. 31 prevents the head portion 20 from coming out of the socket 3. The head portion 20 of the ball stud 2 is rotatably held in the socket 3 and is configured to roll while being sandwiched between the socket 3 (projecting portion 31) and the support member 4. Further, the shaft portion 21 of the ball stud 2 protrudes from the opening 30 on one end side of the socket 3 to the outside. The surface of the protruding portion 31 of the socket 3 is formed as a curved surface along the spherical surface of the outer peripheral surface of the head portion 20 of the ball stud 2, so that the head portion 20 can rotate smoothly in the socket 3. ing.

  In the present embodiment, the socket 3 includes a cylindrical body portion 32 (shown in FIGS. 9 to 12) that is open at both ends, and a lid portion 33 (shown in FIGS. 13 to 16) that is fixed to the body portion 32. It is composed of The body portion 32 has the opening 30 and the protruding portion 31 on one end (upper end in the drawing) side, and a concave groove portion 36 is formed on the outer peripheral surface on one end side over the entire circumference. This groove part 36 is for fixing the dust cover 8 mentioned later. In addition, a grip portion 34 is provided on the outer peripheral surface on the other end (lower end in the drawing) side of the body portion 32 so as to protrude from the outer peripheral surface. The gripping part 34 is made of a plate-like member having a predetermined thickness and a hexagonal shape in plan view. For example, the socket 3 can be easily rotated by gripping the gripping part 34 with a dedicated tool such as a spanner. Further, a stepped portion 35 whose diameter is increased so that the flange 37 of the lid portion 33 abuts is provided on the inner peripheral surface on the other end side of the body portion 32.

  The lid portion 33 is a bottomed cylindrical member provided with a flange 37 at one end (the upper end in the drawing). A through hole 39 penetrating the bottom surface 38 is formed at the center position of the bottom surface 38 of the lid 33. In the present embodiment, the through hole 39 is a bolt hole in which an internal thread is formed on the inner peripheral surface.

  When assembling the socket 3, the lid portion 33 is inserted from the opening on the other end side of the body portion 32, so that the flange 37 of the lid portion 33 is brought into contact with the step portion 35 of the body portion 32. The other end of the portion 32 is crimped to the flange 37 of the lid portion 33. Thereby, the trunk | drum 32 and the cover part 33 are connected so that separation is impossible and integral rotation is possible.

  The support member 4 is placed on the flange 34 of the lid portion 33 in the socket 3. As shown in FIGS. 17-20, the support member 4 consists of a plate-shaped member which has predetermined | prescribed thickness, and is disk shape in this embodiment. The support member 4 is made of a metal material such as non-ferrous metal in addition to iron and steel. A recessed portion 40 that is recessed along the spherical surface of the outer peripheral surface of the head portion 20 of the ball stud 2 is formed at the center position of one surface (the upper surface in the drawing) of the support member 4. Accordingly, the head portion 20 of the ball stud 2 can be smoothly rotated in a state where the head portion 20 of the ball stud 2 is sandwiched between the protruding portion 31 of the socket 3 on the support member 4. Further, a raised portion 41 made of a circular protrusion for positioning a spring 6 described later is formed at the center position of the other surface (lower surface in the drawing) of the support member 4.

  The movable member 5 is placed on the bottom surface portion 38 of the lid portion 33 in the socket 3. As shown in FIGS. 21 to 23, the movable member 5 is formed of a plate-like member having a predetermined thickness, and in the present embodiment, is a disc shape. The movable member 5 is made of a metal material such as non-ferrous metal in addition to iron and steel. The movable member 5 is provided with a columnar pressing member 9 in an upright posture on one surface (the upper surface in the drawing) of the movable member 5. The pressing member 9 is normally set to a length that does not contact the support member 4 whose upper end (the upper end in the drawing) is disposed above. As the movable member 5 slides upward, the pressing member 9 comes into contact with and presses the support member 4.

  As shown in FIG. 4, the spring 6 is disposed between the support member 4 and the movable member 5. In the present embodiment, the spring 6 is formed of a coil spring and is disposed around the pressing member 9. The spring 6 is disposed between the support member 4 and the movable member 5 in a natural length state. The spring 6 compresses as the movable member 5 slides upward, and the spring pressure that the spring 6 tries to return is applied. It acts on the support member 4. As a result, the support member 4 is biased toward the protruding portion 31 side of the socket 3, so that the head portion 20 of the ball stud 2 is pressed against the protruding portion 31 of the socket 3 by the support member 4.

  The base member 7 is attached to the other end side of the socket 3 by screw connection with the socket 3, and as shown in FIGS. 24 to 27, the bottom wall portion 70 having a circular shape in plan view and the periphery of the bottom wall portion 70 are attached. And a peripheral wall portion 71 standing upright. The peripheral wall 71 has an inner diameter slightly larger than the outer diameter of the lid 33 so that the lid 33 on the other end side of the socket 3 can be inserted inside. At the center position of one surface (the upper surface in the drawing) of the bottom wall portion 70, the cylindrical pushing member 10 is provided in an upright posture, the base member 7 is placed in the socket 3, and the pushing member 10 is placed in the through hole 39. Installed in the inserted state. In the present embodiment, the pushing member 10 is formed on the outer peripheral surface with a male screw that engages with a female screw on the inner peripheral surface of the through hole 39. As shown in FIG. 5, the base member 7 is fixed to a desk, a base, a floor, a base base A (or a fixed plate) installed on the floor, and various members S to install the device M on a desk, a base, or a floor. Is done.

  The dust cover 8 is made of an elastically deformable rubber material or a soft synthetic resin material, and covers the upper portion of the socket 3 and the head portion 20 of the ball stud 2 accommodated in the socket 3. As shown in FIGS. 1 and 4, the dust cover 8 is formed in a substantially cylindrical shape in which the central position in the axial direction swells, and one end (the upper end in the drawing) is on the outer peripheral surface of the shaft portion 21 of the ball stud 2. While being fixed, the other end (lower end in the figure) is fixed to a groove 36 formed on the outer peripheral surface of the body portion 32 of the socket 3 via a metal circlip 80. The dust cover 8 prevents water, dust, and foreign matter from entering the socket 3.

  As shown in FIG. 4, the free lock joint 1 according to the present embodiment is such that the spring pressure of the spring 6 does not act so much on the support member 4 when the socket 3 is not screwed into the base member 7. The head portion 20 of the stud 2 can freely rotate within the socket 3. Therefore, as shown in FIG. 28, the direction of the shaft portion 21 of the ball stud 2 can be changed in all directions of up / down, left / right, and diagonal, so that the position and orientation of the device M attached to the shaft portion 21 can be freely set. Can be adjusted. Further, the members S can be connected to each other at an arbitrarily adjusted angle by the free lock joint 1.

  After the adjustment, as shown in FIG. 29, when the socket 3 is screwed into the base member 7, the movable member 5 is pushed by the pushing member 10 of the base member 7 and slides upward in the socket 3. As a result, the spring 6 is compressed, and the spring pressure generated by the compression of the spring 6 acts on the support member 4. As a result, since the head portion 20 of the ball stud 2 is pressed against the protruding portion 31 of the socket 3 by the support member 4, the head portion 20 is suppressed from rotating in the socket 3. When the screwing amount of the socket 3 is increased, the tightening force between the support member 4 that holds the head portion 20 of the ball stud 2 and the protruding portion 31 of the socket 3 is increased, and the head portion 20 protrudes from the socket 3 by the support member 4. It is strongly pressed by the part 31. Therefore, the head 20 of the ball stud 2 is finally restricted from rotating in the socket 3, so that the device M and the member S can be held at adjusted positions and angles. At this time, as shown in FIG. 30, the pressing member 9 of the movable member 5 presses the support member 4, so that the head portion 20 of the ball stud 2 is in a state of being considerably strongly in contact with the protruding portion 31 of the socket 3. M or the member S can be held (fixed) more strongly at the adjusted position or angle.

  On the other hand, when the screwing amount of the socket 3 is reduced, the tightening force between the support member 4 that holds the head portion 20 of the ball stud 2 and the protruding portion 31 of the socket 3 is weakened, so that the screwing amount of the socket 3 is adjusted. Thus, the tightening force can be adjusted.

  As described above, according to the free lock joint 1 of the present embodiment, it can be used only for a specific device, and various devices M can be installed so that the position can be adjusted. Can be connected to adjust the angle. In addition, since the device M and the member S after adjustment can be held at the position by screwing the socket 3 into the base member 7, the adjustment is easy and the structure is simple, so that the manufacturing cost is also low. .

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible unless it deviates from the meaning of this invention. For example, in the above embodiment, the pressing member 9 is provided on the movable member 5, but the pressing member 9 may be provided on the support member 4. Further, if the spring pressure of the spring 6 is strong, the pressing member 9 is not necessarily provided. If the pressing member 9 is not provided, the spring 6 does not necessarily need to be a coil spring, and a leaf spring or the like can also be used.

  In the above embodiment, a female screw is formed in the through hole 39 of the socket 3 (lid portion 33), a male screw is formed in the pushing member 10 of the base member 7, and the socket 3 and the base member 7 are screwed together. However, for example, a male screw is formed on the outer peripheral surface of the socket 3 (lid portion 33), a female screw is formed on the inner peripheral surface of the peripheral wall portion 71 of the base member 7, and the socket 3 and the base member 7 are screwed. May be combined. In this case, the bottom surface portion 38 is not necessarily provided in the socket 3 (lid portion 33).

  Moreover, in the said embodiment, although the base member 7 is being fixed to the base base A (or fixed board) installed on the desk, the stand, and the floor, by increasing the shape of the base member 7, the base member 7 itself It is good also as a foundation foundation which installs on a desk, a stand, and a floor.

DESCRIPTION OF SYMBOLS 1 Free lock joint 2 Ball stud 3 Socket 4 Support member 5 Movable member 6 Spring 7 Base member 9 Press member 10 Push member 34 Gripping part 38 Bottom face part 39 Through-hole 40 Indentation part

Claims (5)

A ball stud provided with a shaft portion provided so that at least a part of the outer peripheral surface protrudes from the spherical head portion and the head portion;
A cylindrical socket having an opening formed at one end with a diameter smaller than that of the head part, and rotatably holding the head part in a state in which the shaft part protrudes from the opening;
A support member provided in contact with the head portion in the socket;
A movable member provided slidably in the axial direction in the socket;
A spring disposed between the support member and the movable member;
A base member that is provided separately from the movable member and is attached to the other end of the socket by screw connection with the socket;
The base member includes a pushing member that pushes and slides the movable member by screwing the socket,
The support member presses the head portion against the socket by the spring pressure of the spring that compresses as the movable member slides ,
The movable member is provided with a pressing member arranged around the spring made of a coil spring,
The pressing member is a free lock joint that presses the support member as the movable member slides . The free-lock joint according to claim 1 , wherein the socket has a bottom surface portion having a through hole at the other end, and the pushing member is inserted through the through hole. The pushing member has a male screw formed on the outer peripheral surface,
The free-lock joint according to claim 2, wherein the through-hole is formed with a female screw that is screwed onto the male screw on an inner peripheral surface. The free lock joint according to any one of claims 1 to 3 , wherein a hexagonal holding portion in plan view is provided on the outer peripheral surface of the socket so as to protrude from the outer peripheral surface. The free lock joint according to any one of claims 1 to 4 , wherein the support member is formed with a recessed portion that is recessed along a spherical surface of an outer peripheral surface of the head portion.