JP2019013466A - Stand device for surgical microscope - Google Patents

Abstract

To provide a stand device for a surgical microscope that does not generate a rotation moment with a rotation axis as its center for a parallel link mechanism even when an exhaust pump is attached to the parallel link mechanism.SOLUTION: Two kinds of components, that is, a weight adjustment component A and a normal component B, are prepared so that when an exhaust pump 17 is attached above a rear arm 4, the weight adjustment component A is attached. The weight adjustment component A is heavier than the normal component B, and the vertical weight balance with a rotation axis 5 of the parallel link mechanism L as a center is achieved so that a rotation moment with the rotation axis 5 as a center is not generated for the parallel link mechanism L. When the exhaust pump 17 is not used, the normal component B is attached.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a surgical microscope stand apparatus.

  A surgical microscope stand device used in neurosurgery or the like supports a surgical microscope in a state of being suspended in the air. A parallel link mechanism extending in the vertical direction is pivotally supported on the stand main body installed on the floor so as to be rotatable around the rotation axis, and a horizontal arm extending in the horizontal direction is formed from an upper portion of the parallel link mechanism. A surgical microscope is suspended from the tip side and supported.

  The surgical microscope stand device is covered with a drape in order to make at least the surgical microscope and the lateral arm sterile. As the drape hangs, it obstructs the view of the doctor or assistant, and an exhaust pump for sucking air in the drape is attached to the parallel link mechanism as needed. The parallel link mechanism includes two parallel forearms and a rear arm, and the exhaust pump is attached to the upper portion of the rear arm (see, for example, Patent Document 1).

JP, 2006-202598, A

  However, in such a related technique, since the exhaust pump is mounted above the rear arm constituting the parallel link mechanism, the weight balance between the upper and lower parts around the rotation axis of the parallel link mechanism is lost by the weight of the exhaust pump. . Therefore, when the parallel link mechanism is tilted forward or rearward and inclined, a rotational moment about the rotation axis is generated in the parallel link mechanism.

  The present invention has been made paying attention to such a related technique, and even when the exhaust pump is attached to the parallel link mechanism, the stand for a surgical microscope which does not generate a rotational moment about the rotation axis in the parallel link mechanism. The object is to provide a device.

  According to the first technical aspect of the present invention, a parallel link mechanism including two parallel forearms and a rear arm with respect to a stand body installed on the floor is rotated in the middle of the forearm. The parallel link mechanism is mounted on the base end portion of the lateral arm extending forward, and supports the surgical microscope on the distal end side of the lateral arm. And the horizontal arm is covered with a drape, and the horizontal arm has a hollow structure, an intake port is formed at the distal end side of the horizontal arm, and a connection port is formed at the base end portion, and an intake pipe inserted into the connection port is provided. This is a surgical microscope stand device in which an exhaust pump having an exhaust pipe at the upper part and having an exhaust port at the lower end is detachably attached to a position above the rotation axis of the front arm in the rear arm of the parallel link mechanism. The parts located below the rotating shaft of the forearm are prepared in two types: normal parts used when the exhaust pump is not attached and weight adjusting parts used when the exhaust pump is attached, Can be attached to and detached from the front arm, and the weight adjustment part is formed to be heavier than the normal part. Due to the difference in weight, the vertical weight balance around the rotation axis of the parallel link mechanism when the exhaust pump is attached is even. It is possible to do.

  According to the second technical aspect of the present invention, the normal part and the weight adjustment part are formed in the same diameter disk shape exposed to the outside at the lowermost part of the forearm, and form the same surface at the time of mounting. In addition, a concave portion for weight reduction is formed on the back surface of the normal part.

  According to the first technical aspect of the present invention, two types of parts located below the rotation axis of the front arm are prepared as normal parts and weight adjustment parts, so that the exhaust pump is installed in the rear arm. If it is mounted on the upper side, it is sufficient to replace the normal part with the weight adjusting part. The weight adjustment part is heavier than the normal part, and the upper and lower weight balance around the rotation axis of the parallel link mechanism is achieved. Even if the parallel link mechanism is tilted forward or backward, it will rotate to the parallel link mechanism. No rotational moment is generated around the axis.

  According to the second technical aspect of the present invention, the normal part and the weight adjusting part are easy to manufacture because they have a disk shape with the same diameter. In addition, since the normal part and the weight adjusting part form the same surface shape at the time of attachment, the appearance of the stand body does not change regardless of which part is attached.

The side view which looked at the stand apparatus for surgical microscopes from the right side. The perspective view which shows the state which attaches an exhaust pump. The perspective view which shows the front-end | tip vicinity of a horizontal arm. The side view which looked at the stand apparatus for surgical microscopes from the left side. The perspective view which looked at the parallel link mechanism from diagonally forward on the left side. Sectional drawing of the weight adjustment components in alignment with the arrow SA-SA line in FIG. Sectional drawing equivalent to FIG. 6 which shows a normal component. The side view which shows a weight adjustment component. The side view which shows a normal component. The side view which shows the parallel link mechanism without an exhaust pump. The side view which shows the parallel link mechanism with an exhaust pump. The side view equivalent to FIG. 11 which shows the state which inclined the parallel link mechanism ahead.

  A preferred embodiment of the present invention will be described with reference to FIGS. In the above and below, the front / rear / left / right directions are as shown in FIGS. 1 and 2.

  The stand main body 1 is usually installed on the floor in the operating room, and is used for suspending the operating microscope 2 for use. A vertical parallel link mechanism L including a front arm 3 and a rear arm 4 is supported on the stand main body 1 so as to be tiltable back and forth around a rotation shaft 5 set in the middle of the front arm 4.

  A lower portion of the parallel link mechanism L extends rearward, and a counterweight W is attached to the rear end thereof. On the other hand, the horizontal arm 6 extends forward from the upper part of the parallel link mechanism L. A distal arm 7 is pivotally supported at the distal end of the horizontal arm 6, and the surgical microscope 2 is supported below the suspended arm 8 via a suspension arm 8.

  The lower end of the proximal arm 10 is pivotally supported on the pivot point 9 of the horizontal arm 6 with respect to the front arm 3. The proximal arm 10 is always kept vertical by another parallel link mechanism (not shown) in the forearm 3. The upper ends of the proximal arm 10 and the distal arm 7 are connected by a sub arm 11. As a result, the vertical state of the distal arm 7 is maintained even when the horizontal arm 6 is pivoted up and down about the pivot point 9.

  The lateral arm 6 is a metal cylindrical shape and is curved upward. The reason why it is curved upward is to secure a lower space. Both ends of the horizontal arm 6 are formed by hollow members 12 and 13 made of casting. The horizontal arm 6 is hollow as a whole, including the hollow members 12 and 13. A rear portion of the hollow member 12 from the front arm 3 constitutes an upper portion of the parallel link mechanism L, and the lateral arm 6 is interlocked with the parallel link mechanism L.

  An air inlet 14 is formed in the hollow member 13 at the tip of the lateral arm 6 (see FIG. 3). The rear hollow member 12 is attachable as a cover 15 as a separate part on the rear side from the base end arm 10. A connection port 16 is formed in the cover 15.

  A necessary part including the lateral arm 6 from the surgical microscope 2 is covered with a drape P for making the stand main body 1 sterile. If the part of the drape P that covers the horizontal arm 6 or the operation microscope 2 hangs down, the visual field of the doctor or assistant is disturbed. In some cases, the microscope 2 is brought into close contact.

  In that case, the air E in the drape P is sucked from the intake port 14 at the tip using the horizontal arm 6 having the hollow structure described above as a ventilation path, and the drape P is brought into close contact therewith. The suction of the air E is performed by the exhaust pump 17. In FIG. 2 and subsequent figures, the drape P is not shown in order to make the internal structure easier to see.

  The exhaust pump 17 has a vertically long shape with a built-in pump, and has a structure in which a flexible intake pipe 18 provided at an upper part thereof and a straight pipe-like exhaust pipe 19 provided at a lower part thereof are integrally provided. doing. The lower end of the exhaust pipe 19 is an exhaust port 20. A switch 21 is provided in a part of the exhaust pump 17. A power cord (not shown) of the exhaust pump 2 is connected to the power source of the stand body 1. The exhaust pump 17 has an intake pipe 18 and an exhaust pipe 19 integrally. However, since the intake pipe 18 and the exhaust pipe 20 are simply tubes, the weight of the exhaust pipe 17 and the exhaust pipe 20 is almost the weight of the exhaust pump 17.

  A method of mounting the exhaust pump 17 will be described. First, the cover 15 is removed, and the intake pipe 18 of the exhaust pump 17 is inserted into the connection port 16. Then, the cover 15 is attached to the hollow member 12 while the intake pipe 18 is inserted into the end of the lateral arm 6 that is exposed inside the hollow member 12.

  Simultaneously with the attachment of the cover 15, the exhaust pump 17 is attached to the upper portion of the rear arm 4 (above the rotating shaft 5) by the two clamps 22 at the exhaust pipe 19 portion. The exhaust pump 17 is attached to the rear arm 4 to be in a state along the rear arm 4, and the intake pipe 18 is inserted into the lateral arm 6 from the connection port 16 by a predetermined length. By attaching the exhaust pump 17 simultaneously with the attachment of the cover 15 in this manner, the operation of inserting the intake pipe 18 into the lateral arm 6 can be easily performed.

  After the exhaust pump 17 is attached, the above-mentioned drape P including the exhaust pump 17 is covered. When the switch 21 of the exhaust pump 17 is pushed after covering the drape P, the inside of the horizontal arm 6 is depressurized, and the air E in the drape P is sucked from the intake port 14 at the tip, and the sucked air E is It passes through the exhaust pump 17 and is discharged from the exhaust port 20 at the lower end of the exhaust pipe 19 to the outside of the drape P.

  Since air E is sucked from the air inlet 14 at the tip of the horizontal arm 6, the drape P near the surgical microscope 2 and near the tip of the horizontal arm 6 is surely sucked and brought into a close contact state, obstructing the visual field of the person around. do not do.

  When the exhaust pump 17 is attached and operated, the drape P is brought into a close contact state. However, when the exhaust pump 17 is attached to the upper portion of the rear arm 4, the upper and lower weight balance around the rotating shaft 5 in the parallel link mechanism L is achieved. It breaks down. That is, the upper side of the rotating shaft 5 of the parallel link mechanism L is heavier than the lower side by the amount of the exhaust pump 21.

  When the parallel link mechanism L is in a vertical state, it is not significantly affected by the weight difference. However, when the parallel link mechanism L is tilted forward and inclined as shown in FIG. 12, for example, the parallel link mechanism L rotates as it is due to the weight difference. A rotational moment is generated that tends to rotate forward about the shaft 5.

  Therefore, in this embodiment, in order to prevent the generation of such a rotational moment, the part constituting the leftmost surface of the lowermost part of the front arm 3 is the weight adjustment part A. The weight adjusting component A is a circular shape having a uniform thickness in the circumferential direction, and is attached to the lowermost portion of the forearm 3 with four bolts 23. The surface of the weight adjusting part A is connected to the surrounding forearm 3 in a mounted state.

  A normal part B, which is also circular and has the same diameter, is prepared for the attachment part of the weight adjustment part A. This normal part B can also be attached to the same part as the weight adjustment part A by four bolts 23, and the surface thereof is continuous with the peripheral forearm 3 in the same manner as the weight adjustment part A in the attached state.

  The surface shapes of the normal component A and the normal component B are not changed, but the normal component B has a circular recess 24 formed on the back surface. Therefore, the normal part B is lighter than the weight adjusting part A. The concave portion 24 is formed by cutting the back surface of the weight adjusting component A by machining, and the normal component B is formed from the same shape as the weight adjusting component A.

  Normally, the normal part B is attached to the lowermost part of the forearm 3. However, when the exhaust pump 17 is used, the weight adjusting part A is attached instead of the normal part B. Therefore, the weight below the rotating shaft 5 in the parallel link mechanism L increases correspondingly, and the vertical weight balance around the rotating shaft 5 of the parallel link mechanism L becomes equal. Therefore, even if the parallel link mechanism L is tilted forward and inclined as shown in FIG. 12, no rotational moment is generated in the parallel link mechanism L around the rotating shaft 5.

  When the exhaust pump 17 is not used, it is replaced with a normal part B instead of the weight adjustment part A, but the weight adjustment part A and the normal part B are exposed to the outside at the lowermost part of the forearm 3, respectively. Since only four bolts 23 are attached, it is easy to replace the weight adjusting part A and the normal part B.

  Further, since the weight adjusting part A and the normal part B form the same surface in the attached state, the appearance of the stand body 1 does not change when any of them is attached.

DESCRIPTION OF SYMBOLS 1 Stand main body 2 Surgical microscope 3 Front arm 4 Rear arm 5 Rotating shaft 6 Horizontal arm 14 Intake port 15 Cover 16 Connection port 17 Exhaust pump 18 Intake pipe 19 Exhaust pipe 20 Exhaust port 24 Recessed part A Weight adjustment part B Normal part L Parallel link Mechanism E Air P Drape W Counterweight

Claims (2)

A parallel link mechanism including two parallel forearms and rear arms is attached to the stand body installed on the floor so that it can tilt forward and backward around a rotation axis set in the middle of the front arms.
The upper part of the parallel link mechanism is configured by a proximal end portion of a lateral arm extending forward, and supports a surgical microscope on the distal end side of the lateral arm, and at least the surgical microscope and the lateral arm are covered with a drape,
The horizontal arm has a hollow structure, and a suction port is formed on the distal end side of the horizontal arm, and a connection port is formed on the base end portion.
An exhaust pump equipped with an intake pipe inserted into the connection port at the top and an exhaust pipe with the exhaust port at the bottom is detachably mounted at a position above the rotation axis of the front arm in the rear arm of the parallel link mechanism A surgical microscope stand device,
A part of the parts located below the rotating shaft of the forearm is prepared in two types as a normal part used when the exhaust pump is not attached and a weight adjusting part used when the exhaust pump is attached. It is detachable from the front arm,
A surgical microscope stand device characterized in that the weight adjustment component is formed to be heavier than a normal component, and that the weight difference makes it possible to equalize the vertical weight balance around the rotation axis of the parallel link mechanism when the exhaust pump is attached.   The normal part and the weight adjustment part have the same diameter disk shape exposed to the outside at the lowermost part of the forearm, respectively, and form the same surface at the time of mounting. 2. The surgical microscope stand device according to claim 1, wherein the surgical microscope stand device is formed.

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