JPH0753026Y2 - Joint - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a joint that bends in all directions,
In particular, in a dust suction device, etc., it is mounted on the joint part of the free arm (absorption hose) so that the suction port at the tip of the free arm can be widely and smoothly positioned while maintaining air permeability. Regarding fittings.

[Prior art]

Conventionally, the suction ports of dust suction devices (vacuum) used for medical treatment and technicians are either provided integrally with the device main body that has the mechanical part of the suction device used at a fixed position, or from the device main body. It was attached to the tip of a suction hose that was supported by hanging the extended support rod (arm) at several places and bending it. The suction hose should be bent in all directions as much as possible, but it was not possible to find a cheap joint that could be installed in the suction hose, did not impede air permeability so much, and had a bending range in all directions.

[Problems to be solved by the device]

Since there is no joint suitable for the device or the like, the device has the following problems. In a suction device in which the suction port is juxtaposed with the main body of the device, the suction port can only suck dust near the device.
It cannot be easily moved to approach the dust scattering source. When the suction hose is supported on the supporting rod by using a hanger, the structure becomes complicated and it is difficult to link the hose with the supporting rod, which causes problems in terms of aesthetics and functionality. Further, even if the suction port is attached to the tip of the suction hose so as to approach the dust scattering source, the suction port cannot be moved in a delicate direction / angle and stopped. Therefore, the dust collection efficiency of the dust suction device remains low, for example, because it is impossible to minimize the cutting dust of the teeth and the dissipation of bacteria in the dental clinic. In the present invention, an object of the present invention is to devise a joint joint which is installed in a hollow tube such as a suction hose while maintaining air permeability and is bendable in all directions.

[Means for solving problems]

The present invention proposes a joint equipped on a free arm that enables the suction port at the tip of the free arm (suction hose) in a dust suction device or the like to be smoothly positioned over a wide range. According to the present invention, conical locking holes are continuously provided so that their edges are in contact with each other over substantially half of the entire circumferential surface of each of the two disks, and the two disks are tracked. Join the locking holes so that the circumferential surfaces intersect at a right angle, and join them at the vertices of the semi-circular surfaces that do not form a row. A bolt that is sandwiched and has a screw hole in the base portion that is bifurcated and that has two arms on the side surface of the base end that is pivotally supported around the center of the disk to be rotatable and that is screwed into the screw hole. A cylindrical hole is formed at the center of the entire surface of the disk, and a coil spring is interposed in the cylindrical hole to urge the ball so as to slightly project in the axial direction, and the ball comes into contact with the circumferential surface of the disk. By screwing this bolt into the screw hole, it slides on the circumferential surfaces of the two disks. The movement of the moving ball and the rotation of the rotating rod can be made smooth, and the ball can be freely locked in the locking holes in any direction among the locking holes provided in series, and the rotating rod can be moved in all directions. The joint is characterized in that it can be bent to a wide range, and the range of choices for positioning the rotating rod can be widened. One rotating rod rotates in the vertical direction (latitude), the other rotating rod rotates in the horizontal direction (longitude), and as a whole it becomes a joint that can be bent in all directions by the combination of vertical and horizontal directions. .

【Example】

Next, an embodiment of the joint according to the present invention will be specifically described with reference to the drawings. FIG. 1 is a front sectional view of a main part of the joint, and FIG. 2 is a rear view of the joint showing a state in which one rotating rod is rotated. The conical locking holes 3 are continuously provided so that their edges are in contact with each other over substantially half of the entire circumferential surfaces of the disks A and B, and the circumferential surfaces of the disks A and B are intersected at a right angle. As described above, the discs A and B are sandwiched between the discs A and B so that they are joined by soldering or the like at the apexes of the semi-circumferential surface where the locking holes 3 are not provided, and intersect at right angles at this joint point to form a kinematic pair. Rotating rods 1 and 2 which are bifurcated and pass through a screw hole 4 in the base portion and provided with two arms 10 on the side surface of the base end portion are pivotally supported by a shaft 6 at the center of the disks A and B. A cylindrical hole 7 is formed in the center of the entire surface of the bolt 5 that is screwed into the screw hole 4 of each of the rotary flexible members 1 and 2, and a coil spring 9 is interposed in the cylindrical hole 7 so that a ball 8 is formed. The bolt 5 is biased so as to slightly project in the direction of the shaft 6, and the bolt 5 is moved so that the ball 8 comes into contact with the circumferential surfaces of the disks A and B. Screwed into the shaped hole 4. When the balls 8 sink into the cylindrical hole 7 while being pushed by the inclined surface of the conical locking hole 3 and move to the next locking hole 3, the repulsive force of the coil spring 9 is generated. It is rotated while repeating the action of engaging with the engaging hole 3. The locking holes 3 are formed in a conical shape and are continuously provided while their edges are in contact with each other, so that the sliding movement of the balls 8 is made smooth and the locking points are increased, and the stop positions of the rotary rods 1 and 2 are increased. Since the range of selection can be made wide, it is possible to stop the rotating rods 1 and 2 in a delicate direction and angle. Further, both shafts 6 are arranged at a right angle with a space therebetween, and the rotating rod 1,
Since the two rods are paired at right angles at the joining points of the disks A and B, in the embodiment, if the rotary rod 1 is rotated in the horizontal direction (arrow E), the conical locking of the cone A is achieved. When the ball 8 retained in the hole 3 is pressed by the inclined surface of the retaining hole 3 and sinks while compressing the coil spring 9, the ball 8 moves to the next retaining hole 3 beyond the edge, The revolving rod 1 is stopped by the repulsive force of the coil spring 9, so that the revolving rod 1 is stopped. By repeating this action, the revolving rod 1 is joined along the circumferential surface of the disk A. It rotates (reciprocates) around almost the entire circumference except points. When the rotating rod 2 is rotated in the vertical direction (arrow F), the rotating rod 2 moves along the circumferential surface of the disk B by the same action as above.
It rotates (reciprocates) almost all around the joint except the joint. The actual size of the joint in the example is a joint having a total length of 19.4 cm and a total width of 6 cm, and the actual size of each part is that the disks A and B have a diameter of 3.6 c.
The thickness of the conical locking hole 3 is 0.3 cm and the depth is 0.1 cm.
cm The conical surface has an inclination angle of 25 °, the ball 8 has a diameter of 0.4 cm,
The rotating rods 1 and 2 have a total length of 5.2 cm, a fork length of 3.2 cm, a width of 2 cm and a thickness of 0.5 cm, a base end diameter of 1.8 cm, and a screw hole diameter of 1 cm.
Is. The number of the locking holes 3 is 21 in the embodiment. Of course, the angle between the locking hole 3 and the adjacent locking hole 3 determines the rotation angle per piece. As shown in FIG. 3, when it is used in the joint part of the free arm 13 such as a suction machine, , If the arm 10 of the rotating rod 2 is connected and fixed to the body of the cylindrical arm 13 and the suction port 12 is connected to the suction port mounting plate 11 attached to the arm 10 of the rotating rod 1, the suction port 12 or the handle When holding 15 and moving it up or down, the disk A is connected to the disk B at a right angle, so that the rotating rod 1, disk A, and disk B are fixed and rotated around the axis 6 of the disk B. Therefore, the suction port 12 moves upward and downward to move the suction port 12
If it is moved to the left or right while holding the disk B and disk A, only the rotating rod 1 is rotated and the suction port 12 is rotated.
Moves left and right. By combining the upward and downward movement and the horizontal movement, the suction port 12 can be bent in all directions with each axis 6 of the rotating rod 1 or 2 as a base point. A bellows-shaped cover 14 is attached to the joint portion of the free arm 13 such as a suction machine, and the free arm 13 serves as a suction hose as a whole. Then, the joint body is located in the suction passage. The cover 14 of the joint portion of the free arm 13 has an elastic ring and the like so that it does not block the passage even if it is bent, but since the discs A and B of the joint still project in four directions, it is somewhat soft. Even if the joint cover 14 is made of a material, it is not closed. Further, since the disks A and B intersect at right angles, a gap is formed between them and the passage is always maintained. Very useful as a joint in passages. In terms of fluid dynamics, it is possible to propose a configuration in which the shapes of the rotating rods 1 and 2 are streamlined with minimal resistance, and a configuration in which the disks A and B are thin. It should be noted that this embodiment is merely an example, and, for example, the number and depth of the locking holes 3 can be easily changed in design, and the present invention is not limited to this. Finally, this embodiment can be modified in design, modified in design, or modified in details based on the known state of the art, and application in other fields and addition of other techniques are also included in the present invention.

[Effect of device]

The joint according to the present invention has the structure and operation as shown in the above embodiment, and has the following unique technical effects. Assembling work is easy because it has a simple structure.
Since it has a symmetrical structure, it can be manufactured at a low cost with a small number of parts. Since the locking holes are formed in a conical shape and are continuously connected with their edges in contact with each other, the balls slide smoothly. Therefore, the rotating rod can be smoothly and accurately rotated in all directions without applying a strong force. Also, once the ball is in the locking hole, it will snap into place and will not move easily unless external force is applied. Based on the joining point of the two discs, the two rotating rods were shifted at right angles and made to mate, so when the arm of one rotating rod is fixed, the arm of the other rotating rod should be moved in all directions. Is possible. That is, refraction in all directions is possible. Moreover, it is possible to easily bend it to a desired position with one hand by balancing the forces. It has versatility that it can be widely used not only for medical and technical purposes but also for joints such as desk lamps and other refractive joints. Especially, when it is installed in a bendable passage, the passage gap can be made abnormal by a disk, which is extremely useful. INDUSTRIAL APPLICABILITY As described above, the present invention is a joint that allows refraction in all directions, such as being used as a joint for a free arm of a dust suction device, etc., and can perform delicate positioning over a wide range and smoothly. It should be a useful and valuable invention.

[Brief description of drawings]

The drawings show one embodiment of a joint according to the present invention. FIG. 1 is a sectional view of a front main part of the joint, and FIG. 2 is a joint showing a state in which one of the rotating rods is rotated. Rear view of Figure 3,
It is an incision view of the free arm joint part of the suction machine which uses a joint. Explanation of symbols A, B ... Disk 1, 2 ... Rotating rod 3 ... Locking hole 4 ... Screw hole 5 ... Bolt 6 ... Shaft 7 ... Cylindrical hole 8 ... Ball 9 ... Coil spring 10 …… Arm 11 …… Suction port mounting plate 12 …… Suction port 13 …… Free arm 14 …… (joint part) cover 15 …… Handle EF …… Arrow

Claims (1)

[Scope of utility model registration request] 1. A pair of discs, in which locking holes are continuously provided so that their edges are in contact with each other over substantially a half circumference of the entire circumferential surface, so that the circumferential surfaces of each disc intersect with each other at a right angle. The holes are joined at the apexes of the peripheral surface that are not connected, and the discs are sandwiched in each disc so that they intersect at right angles at this joint point to form a kinematic pair. A rotating rod provided with two arms on its side surface is rotatably supported by the center of the disk, and a cylindrical hole is formed in the center of the entire surface of a bolt screwed into the screw hole. By interposing a spring in the hole to urge the ball to project in the axial direction, and by screwing this bolt into the screw hole so that the ball contacts the circumferential surface of the disk, In each of the rotating rods, the movement and rotating rod of the ball sliding on the circumferential surface of the disk The joint is characterized in that the rotation of the rotary rod can be made smooth and the range of selection of the positioning of the rotary rod can be widened.