JP6851615B2 - Medical stand device - Google Patents

Description

The present invention relates to a medical stand device.

Medical devices such as operating microscopes and cameras are supported and used by stand devices installed on the floor.

The stand device has a structure that uses a parallel link mechanism so that the medical device can be moved back and forth and up and down while maintaining the vertical state.

The movement in the vertical direction is performed by a parallel link mechanism in which a base end arm provided in a part of the stand body and a tip arm supporting a medical device are connected by two upper and lower main arms and a sub arm. The base arm side is immobile, and the tip arm side moves up and down together with the medical device. Due to the parallel link mechanism, the vertical state of the tip arm is maintained, and the vertical state of the medical device is also maintained. The doctor can easily observe and take pictures because the vertical state of the medical device is always maintained.

Both the main arm and the sub arm are made of metal pipe. The main arm pipe has a large diameter and supports the weight of medical equipment. The pipe of the sub-arm has a small diameter and functions to transmit torque from the base end arm side to the tip end arm to maintain the posture of the tip end arm vertically (see, for example, Patent Document 1).

Japanese Patent No. 4480703

However, in such a related technology, since the two pipes of the main arm and the sub arm can be seen from the outside, there is a feeling of oppression and the appearance is not good. A structure has also been proposed in which the sub-arm is housed inside the main arm so that it looks like a single piece, but since the sub-arm is housed inside the pipe-shaped main arm with a closed cross section, the installation work of the sub-arm is difficult. Is. In addition, it was difficult to check the mounting state of the sub arm after mounting.

The present invention has been made by paying attention to such a related technique, and an object of the present invention is to provide a medical stand device which looks like one in appearance and yet is easy to attach to the main arm of a sub arm. There is.

According to the first technical aspect of the present invention, the lower end of the vertical base end arm provided on a part of the stand body and the lower end of the vertical tip arm on which the medical device is supported below are formed on the medical device. A parallel link mechanism that extends laterally by connecting with a large-diameter main arm that bears the weight of the main arm and connecting the upper ends of the base end arm and the tip end arm with a sub-arm that is mechanically parallel to the main arm and has a smaller diameter than the main arm. However, the tip arm side of the main arm and the sub arm is a medical stand device that can move up and down around the base end arm side, respectively, and the main arm has a hollow concave shape in cross section in which a recess along the longitudinal direction is formed in the upper part. The sub-arm is housed in the recess.

According to the second technical aspect of the present invention, a cover along the longitudinal direction is attached to the upper part of the recess.

According to the third technical aspect of the present invention, ribs for dividing the internal space into a plurality of spaces are integrally formed along the longitudinal direction in the closed cross section of the main arm.

According to the first technical aspect of the present invention, since the sub-arm is housed in the recess formed from the upper part of the main arm, it looks like one and looks good. Since the upper part of the recess is open, the sub-arm can be attached from above, and workability is good. Work such as maintenance of the sub arm can be easily performed. Since the main arm has a hollow concave cross section, it has higher rigidity than a simple pipe cross section.

According to the second technical aspect of the present invention, since the upper part of the recess is covered with the cover, it is possible to prevent dust and dirt from entering the recess.

According to the third technical aspect of the present invention, since the rib is integrally formed in the closed cross section of the main arm, the rigidity of the main arm is further improved.

The perspective view which shows the stand device. A side view showing a stand device. The perspective view which shows the structure of both ends of a sub arm. FIG. 1 is a cross-sectional view of a sub-arm along the line SA-SA shown in the middle. The mechanism diagram which shows the parallel link mechanism. A mechanism diagram showing a state in which the parallel link mechanism is deformed up and down.

1 to 6 are views showing a preferred embodiment of the present invention. In the above and below, the front-back and left-right directions are as shown in FIG.

The stand device 1 is a device for suspending and using the operating microscope 2 as a medical device in the operating room. An intermediate portion of the vertical arm 4 is pivotally supported on the stand body 3 so as to be tilted back and forth around the shaft fulcrum a. The vertical arm 4 is made of casting and has a hollow shape that is long vertically.

An upper arm 5 and a main arm 6 are attached to the upper part of the vertical arm 4. The upper arm 5 is made of casting, and the main arm 6 is an extruded product made of aluminum alloy, and the rear end of the main arm 6 is inserted into the front end of the upper arm 5 and connected. A shaft fulcrum b is set at the front end of the upper arm 5, and mechanically, the front side of the shaft fulcrum b is the main arm 6 and the rear side is the upper arm 5. The upper arm 5 and the main arm 6 are gently curved upward as a whole.

A lower arm 7 extending rearward is provided on the lower side of the vertical arm 4, and a counterweight W is attached to the end of the lower arm 7. The rear end of the upper arm 5 and the middle portion of the lower arm 7 are connected by a vertical sub-arm 8. As a result, a vertical parallel link including the vertical arm 4 and the vertical sub-arm 8 is formed.

The lower end of the base end arm 9 is pivotally supported at the shaft fulcrum b of the main arm 6, and the lower end of the tip arm 10 is pivotally supported at the tip of the main arm 6. Inside the upper part of the vertical arm 4, a horizontal member 11 that is integrated with the base end arm 9 and rotates together with the shaft fulcrum b is provided. Further, an immovable horizontal member 12 fixed to the stand body 3 is provided inside the lower part of the vertical arm 4 at a position corresponding to the shaft fulcrum a. Both ends of the upper and lower horizontal members 11 and 12 are connected by two shafts 13 extending vertically.

A parallel link is also formed inside the vertical arm 4 by the upper and lower horizontal members 11, 12 and the two shafts 13 and the virtual link ab of the vertical arm 4. Since the spindle direction of the base end arm 9 is fixed to the horizontal member 12 fixed in the horizontal direction, the base end arm 9 is always kept vertical even if the vertical arm 4 is tilted back and forth about the shaft fulcrum a. Will be done.

As shown in FIG. 4, the main arm 6 has a hollow concave shape in cross section in which a concave portion 14 along the longitudinal direction is formed. Further, in the cross section, a V-shaped rib 15 that connects the vicinity of the bottom of the recess 14 and the opposite position thereof is integrally formed, and the cross section is divided into three spaces. The rigidity of the main arm 6 has already been increased by making the cross section hollow concave, but the rigidity is further increased by adding the rib 15.

The base end arm 9 and the tip end arm 10 face the terminals of the recesses 14 at both ends of the main arm 6. Then, the upper end of the base end arm 9 and the upper end of the tip end arm 10 are connected by a sub-arm 16 that is gently curved upward. The sub-arm 16 is inserted from above the recess 14 and both ends are connected to the base end arm 9 and the tip end arm 10, and are located inside the recess 14 in a connected state. A substantially inverted U-shaped cover 17 is attached to the upper portion of the main arm 6 to which the sub arm 16 is attached along the longitudinal direction, and a substantially triangular cap 18 is attached to the upper portion of the tip arm 10.

By connecting the sub-arms 16, a lateral parallel link mechanism A including the main arm 6, the tip arm 10, and the proximal arm 9 is formed. Therefore, the angle between the horizontal member 12 fixed to the stand body 3 and the base end arm 9 by the two parallel link mechanisms is always maintained constant. That is, since the vertical state of the base end arm 9 is always maintained by the above-mentioned structure, the tip arm 10 connected by the sub arm 16 is also maintained vertical, and the posture of the operating microscope 2 supported under the vertical state is also maintained. The vertical state is always maintained. Even if the main arm 6 is moved up and down around the shaft fulcrum b as shown in FIG. 6 or the entire vertical arm 4 is tilted back and forth around the shaft fulcrum a, the vertical state of the tip arm 10 is always maintained. ..

When the operating microscope 2 is moved up and down as shown in FIG. 6, the parallel link mechanism A including the main arm 6 and the sub arm 16 is deformed obliquely in the vertical direction, so that the distance between the main arm 6 and the sub arm 16 changes. The width E is the widest when the space between the two is horizontal, and the width e becomes narrow when the width E is deformed up and down. Based on the main arm 6, the sub-arm 16 moves up and down relatively in the recess 14, but the internal space formed by the recess 14 and the cover 17 has a vertical size that allows the sub-arm 16 to move up and down. Therefore, the sub-arm 16 does not interfere with the bottom of the recess 14 or the cover 17.

According to this embodiment, since the sub-arm 16 is housed in the recess 14 formed from the upper part of the main arm 6, it looks like one and looks good. Since the upper portion of the recess 14 is open, the sub-arm 16 can be attached from above, and the workability is good. Work such as maintenance of the sub arm 16 can be easily performed. Since the main arm 6 has a hollow concave cross section, it has higher rigidity than a simple pipe cross section. Since the upper portion of the recess 14 is covered with the cover 17, it is possible to prevent dust and dirt from entering the recess 14.

1 Stand device 2 Operating microscope (medical equipment)
3 Stand body 6 Main arm 9 Base end arm 10 Tip arm 14 Recess 15 Rib 16 Sub arm A Parallel link mechanism W Counterweight

Claims (3)

The lower end of the vertical base arm provided on a part of the stand body and the lower end of the vertical tip arm on which the medical device is supported below are connected by a large-diameter main arm that bears the weight of the medical device.
A parallel link mechanism is formed in which the upper ends of the base end arm and the tip end arm are mechanically parallel to the main arm and are connected by a sub arm having a diameter smaller than that of the main arm to form a lateral link mechanism. A medical stand device that can move up and down around the arm side.
A medical stand device characterized in that the main arm has a hollow concave shape in a cross section in which a recess along the longitudinal direction is formed in the upper portion, and a sub arm is always housed in the recess. The medical stand device according to claim 1, wherein a cover along the longitudinal direction is attached to the upper portion of the recess. The medical stand device according to claim 1 or 2, wherein ribs for dividing the internal space into a plurality of spaces are integrally formed along the longitudinal direction in the closed cross section of the main arm.

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