JPH06277230A - Stand device of medical treatment optical apparatus - Google Patents

Abstract

PURPOSE:To provide the stand device of a medical treatment optical apparatus, in which a focus of the medical treatment optical apparatus concentrates in one point (immovable), and also, the medical treatment optical apparatus can be subjected to air stop at an arbitrary position. CONSTITUTION:Base end parts 26, 26 of a parallel link mechanism 25 are placed in one end side of a freely turnable center shaft 21, and in the other end side of the center shaft 21, a counter weight for swinging by interlocking with the parallel link mechanism 25, and also, offsetting weight of the parallel link mechanism 25 and a medical treatment optical apparatus 34 and allowing the medical treatment optical apparatus 34 to be subjected to air stop is hung and supported, and moreover, a focus (f) of the medical treatment optical apparatus 34 is positioned and installed on an extended line L for connecting both the base end parts 26, 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stand device for medical optical equipment.

[0002]

2. Description of the Related Art Brain surgery and heart surgery are performed while observing an affected area with a surgical microscope as a "medical optical device", which is a very fine and nerve-based operation, and the operation time is also long. It often takes a long time. Such a prolonged operation time is not preferable because it increases physical and mental fatigue for both the patient and the doctor.

Medical optical equipment such as a surgical microscope plays a very important role in such advanced surgery, and the ease of use of the medical optical equipment leads directly to the reduction of the operation time. is there. The ease of use of the medical optical device means how accurately and quickly the medical optical device can be aligned with the target site (affected part).
In addition, whether it can be moved from the surgical area and fixed at an arbitrary preparation position when it is not needed, whether the observation point once fixed does not shift, etc. depends on the stand that supports it rather than the medical optical device itself. It's a very big one.

Therefore, as a conventional stand device for medical optical equipment, there is one as shown in FIGS. 11 and 12, for example (see Japanese Patent Laid-Open No. 56-32110).
Reference numeral 1 is a stand base, 2 is a stand column, and a first parallel link 3 is provided at a rotation fulcrum 4 at an upper end portion of the stand column 2.
Is installed through. The first parallel link 3 is rotatable frontward (in the direction of arrow A in the drawing) or rearward (in the direction of arrow B in the drawing) about the rotation fulcrum 4, and is also provided on the rotation fulcrum 4 (not shown). It is freely locked and locked by the electromagnetic clutch. At the upper part of the first parallel link 3, there is a horizontal shaft 5, to which the second, third,
A parallel link mechanism 8 including the parallel links 6 and 7 is assembled. That is, both base end portions 9 of the parallel link mechanism 8 are attached to the horizontal shaft 5. A support shaft 10 is provided in a hanging direction at the front end of the parallel link mechanism 8, and a surgical microscope 11 is attached to the lower end of the support shaft 10. Further, a counterweight W is attached to the lower portion of the first parallel link mechanism 3 to cancel the weight of the surgical microscope 11 and the parallel link mechanism 8, and to stress the surgical microscope 11 to an arbitrary position in space without stress. It can be positioned.

[0005]

However, in such a conventional stand apparatus for medical optical equipment,
Since the focus f of the operating microscope 11 is not on the extension line L connecting both base ends 9 of the parallel link mechanism 8, that is, not on the extension line of the horizontal shaft 5, the parallel link mechanism 8 is deformed (rotated). ), The focus f of the surgical microscope 11 also moved along a rotation trajectory (see FIG. 12). in this way,
Since the focus f of the surgical microscope 11 moves when the parallel link mechanism 8 is deformed, it is impossible to observe one diseased part from various angles while deforming the parallel link mechanism 8, and the operation time is long. It was not possible to achieve effective shortening of.

The present invention has been made by paying attention to such a conventional technique and intends to solve the above problems.

[0007]

In order to achieve the above object, a stand device for an engine medical optical device according to the present invention comprises two rocking link members which rock around a base end portion. Forming a parallel link mechanism including a first parallel link and a second parallel link assembled to and interlocking with the first parallel link, and the swing link of the first parallel link in the second parallel link. A medical optical device is supported by a distal end link member that is kept parallel to the member, and the base end portion of the swing link member is provided at one end side of a rotatable center shaft, and at the other end side of the center shaft. A counterweight that swings in conjunction with the parallel link mechanism and offsets the weight of the parallel link mechanism and the medical optical device to suspend the medical optical device in the air is suspended and supported, and the medical optical device is also supported. Focus of It is obtained by positioning placed on the extension connecting both base end portion of the swing link member.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to FIGS. First, the configuration will be described, and each operation will be described later.

Reference numeral 21 denotes a center shaft, which is rotatably supported in an inclined holding portion 22 via a bearing. The front side (direction A in the figure) side of the center shaft 21 is machined into a plate shape, and a parallel link mechanism 2 including a first parallel link 23 and a second parallel link 24 is formed on the plate part.
5 is attached. That is, the first parallel link 23
Is provided with two swing link members 23a which are swingable about the base end portions 26, 26 which are rotatably attached to the center shaft 21. The second parallel link 24 is assembled to one of the swing link members 23a,
It is adapted to be deformed (rotated) in conjunction with the first parallel link 23. The tip portion (tip link member) 27 of the second parallel link 24 similarly swings while maintaining the parallel state with the swing link member 23a. The tip portion 27 has a turning fulcrum. A turning piece 29 is attached as a "supporting portion" which is turnable in the horizontal direction around 28, and a first turning plate 30 is attached to the tip of the turning piece 29.
It is attached so as to be horizontally rotatable around the center of the first rotating plate 30, and a second rotating plate 32 is further attached to the tip of the first rotating plate 30 so as to be horizontally rotatable around a shaft 33. And
To the position directly below the second rotating plate 32, "medical optical device"
A surgical microscope 34 is attached via a hanging arm 35. The surgical microscope 34 can be tilted and supported about the rotation fulcrum 36 of the hanging arm 35 at tilt angles of 45 ° and 90 ° from the vertical state. The focal point f of the surgical microscope 34 supported in this manner is a vertical position that always passes through the rotation fulcrum 28 regardless of whether the surgical microscope 34 is in a vertical state, a tilted state of 45 °, or a tilted state of 90 °. It is located on the line S. Details will be described later. Moreover, the focal point f of the surgical microscope 34 is on the extension line L connecting both base end portions 26 of the parallel link mechanism 25,
That is, since it is positioned and installed on the extension line of the center axis of the center shaft 21, the position of the focal point f does not change even if the parallel link mechanism 25 is deformed. This is the basic feature of the present invention. Further, 37 is an operation handle, which is a surgical microscope 3
It is used when the 4 is moved (swinged). At the base end and the tip end of the rotating piece 29, mounting portions 38 for replacing the operating handle 37 according to the posture of the operator are provided.

In addition, the rear of the center shaft 21 (B in the figure)
On the (direction) side, a pendulum-shaped first counterweight W1 that swings around a rotation fulcrum 39 is suspended and supported via a swing bar 40. An adjustment handle 41 is provided on the first counter weight W1, and the height position of the first counter weight W1 can be adjusted by rotating the adjustment handle 41. A cover 42 covers the first counterweight W1 and the swing bar 40. Then, the upper end 43 of the swing bar 40 and the rear portion of the parallel link 24 are connected by a connecting arm 44 so that the parallel link mechanism 25 and the first counterweight W1 are interlocked with each other. . The first counterweight W1 thus configured cancels the weights of the surgical microscope 34 and the parallel link mechanism 25 and the rotational moment of the parallel link mechanism 25 about the center shaft 21. Further, since the center shaft 21 is inclined by the angle α, the first counterweight W1
Etc. are excluded from the operation area, and a wide and free operation area for the operator can be sufficiently secured.

Further, on the upper surface of the cover 42 for the first counterweight W1, a second counterweight W2 which swings in a substantially horizontal direction via another swing bar 45 is provided on the cover 4.
It is arranged in a state of being covered with 6. The base end of the swing bar 45 for the second counterweight W2 is fixed to the pivot shaft 47.
Is a pair of bevel gears 48 that convert the rotational force to the right angle direction.
It is designed to be interlocked with a rotatable disc 49 on the side near the rear end of the center shaft 21 via. Then, in the vicinity of the base end portion 26 of the parallel link mechanism 25, the indirect portion 50 of the parallel link mechanism 25, and the tip end portion 27 of the parallel link mechanism 25, discs 51 to 5 similar to the disc 49 are provided.
3 is rotatably arranged. And these discs 4
9, 51 to 53 are connected to each other by a pair of link bars 54 so that the rotational force can be transmitted. The disk 53 at the tip portion 27 of the parallel link mechanism 25 is connected to another pivot shaft 56 fixed to the rotating piece 29 by the same bevel gear 55 as described above. Therefore, when the turning piece 29 is turned in the horizontal direction, the turning power is generated by the pivot shaft 56 → bevel gear 55 → disc 53 → disc 52 → disc 51 → disc 49 → bevel gear 48.
→ Through the pivot shaft 47, the swing bar 45 (that is,
The second counterweight W2) is rotated in a direction opposite to that of the rotating piece 29 so as to cancel the rotational moment about the center shaft 21 generated by the rotation of the rotating piece 29. An adjusting handle 57 is also provided on the second counter weight W2, and the adjusting handle 5 is provided.
By rotating 7 the second counter weight W2
The position of the tilt angle of the surgical microscope 34 (vertical, 45 °,
90 °). The swing locus portion of the second counterweight W2 in the cover 46 is in a released state, and a vertical slit 58 is formed in the upper surface portion thereof. This slit 58 is provided with three marks (memory) 59 corresponding to the respective tilt angles of the above-mentioned three stages.
By aligning the reference mark of the counter weight W2 with each of these marks 59, the three-step adjustment by the adjustment handle 57 of the second counter weight W2 can be easily and accurately performed.

The holding portion 22 that rotatably supports the center shaft 21 is provided with a tubular portion 60 that is rotatably provided via a bearing on the lower side, and the tubular portion 60 is a multistage parallel link mechanism. It is connected to 61. That is, as a part of the multistage parallel link mechanism 61, the holding portion 22 and the tubular portion 60.
The multistage parallel link mechanism 61 supports all structures (weight) above the center shaft 21 so as to be vertically movable. The multi-stage parallel link mechanism 61 is pivotally supported by a stand shaft portion 63 that is rotatably erected on a stand base 62, and includes a pair of left and right upper parallel links 64 and a lower parallel link that are vertically stacked. And 65. The lower parallel link 65 is pivotally supported by a rotating shaft 67 at the tip of the protruding portion 66 of the stand shaft portion 63, and the upper parallel link 64 is a rotating shaft 68 near the upper end of the stand shaft portion 63 above the lower parallel link 65. Is pivoted at. The upper-end parallel link 64 and the lower-side parallel link 65 are connected by a connecting link 69 so that they are interlocked with each other. Further lower parallel link 6
A third counterweight W3 for offsetting the weight of the structure above the center shaft 21 [hereinafter, referred to as "upper structure"] is arranged at the rear end of 5. This third counterweight W3 also has the same adjustment handle 70 as described above.
Is installed. This multistage parallel link mechanism 61 is
In this way, by arranging the lower parallel link 65 and the upper end parallel link 64 one above the other, if one parallel link is to be supported, the substantial length of the upper end parallel link 64 (from the holding portion 22 to the rotating shaft 68). Up to a distance d1) and a substantial length of the lower parallel link 65 (distance from the rotation shaft 68 to the third counterweight W3) d2. The length size can be shortened by the overlapping distance d3 of 68 and the rotating shaft 67, and the overall stand device can be made smarter, and since the third counterweight W3 does not project rearward, it interferes with people and equipment around it. It is difficult to do and is preferable in terms of safety. Reference numeral 71 is another connecting link for reinforcing the lower parallel links 65. 72 is a cover for the stand shaft portion 6
3 and the lower parallel link 65. Also, 7
Bellows 3 and 74 respectively extend and contract following the vertical movement of the upper parallel link 64 and the vertical movement of the third counterweight W3 to prevent the inside of the cover 72 from being exposed. And 75 is an operation panel. Further, an electromagnetic clutch (not shown) is arranged at each operation (indirect) portion of the stand device, and a lock / free state of each portion can be arbitrarily selected and operated by a foot switch (not shown). ing.

Next, each operation of the stand device will be described. Forward / backward movement (directions A and B in the figure ) As shown in FIG. 6, when the surgical microscope 34 is pushed in the forward / backward direction, the stand shaft portion 63 and the tubular portion 60 follow and rotate by an appropriate angle. The angles θ1 and θ between the parallel link mechanism 25 and the surgical microscope 34 during forward and backward movements
The change of 2 is also a turning piece 29 supporting the surgical microscope 34.
Since it can be automatically adjusted by rotating in the F direction, the operating microscope 34 can be moved back and forth (translated) while keeping the observation angle constant.

Vertical movement (direction C in the figure) When the surgical microscope 34 is pushed in the vertical direction, the multistage parallel link mechanism 61 is deformed so that the "upper structure" can be easily moved up and down in an unloaded state in which it is in balance with the third counterweight W3. Move.

Left-right movement (D direction in the figure ) As shown in FIG. 7, when the surgical microscope 34 is pushed in the left-right direction, the stand shaft portion 63 and the tubular portion 60 follow and rotate by an appropriate angle. Also, the change in angle between the parallel link mechanism 25 and the surgical microscope 34 during forward and backward movement is
Since automatic adjustment can be performed by rotating the rotating piece 29 supporting the surgical microscope 34 in the F direction, the surgical microscope 34 can be moved in parallel in the left-right direction while keeping the observation angle constant.

Arbitrary adjustment of observation angle of surgical microscope (see FIG. 4 ) The following points are the greatest features of the present invention. That is, the focus f of the surgical microscope 34 is set to the both base end portions 2 of the parallel link mechanism 25.
On the extension line L connecting 6, 26, that is, the center shaft 21
Since it is positioned and installed on the extension line of the axis center, the focal point f remains fixed at one point even if the parallel link 25 is deformed (rotated). Therefore, it becomes possible to arbitrarily adjust the observation angle in the direction along the parallel link mechanism 25. At this time, since the first counterweight W1 swings by an angle corresponding to the deformation of the parallel link mechanism 25, the surgical microscope 3
The weights of 4 and the parallel link mechanism 25 are offset by the first counterweight W1, and the weight balance is automatically maintained.
The position of the first counterweight W1 is set to the surgical microscope 3
It is necessary to make adjustments with the adjustment handle 41 according to the accessory (eg, microscope for assistant, video camera, etc.) that is loaded on the device 4.

Rotational movement around the center shaft (direction E in the figure) When the surgical microscope 34 is swung in the rotation direction around the center shaft 21, it is rotated together with the parallel link mechanism 25, but the first counterweight W1 is also swung. Since the bar 40 swings in its rotation direction, the weight balance remains maintained, and the surgical microscope 34 stops at the rotated movement position.

Horizontal rotation by the rotating piece (F direction in the figure) By rotating the rotating piece 29, the surgical microscope 34 is horizontally rotated in the F direction. For example, the surgical microscope 34 is moved around the head 76 of the patient. You can make one lap. Even when the turning piece 29 is no longer positioned along the longitudinal direction of the parallel link mechanism 25 (especially, when the turning piece 29 is in a state of protruding in the direction perpendicular to the parallel link mechanism 25), the turning piece 29 is rotated. According to the movement, the second counterweight W is moved by the discs 49, 51 to 53, the link bar 54, the bevel gears 48, 55, etc.
Since 2 swings to the opposite side, the weight balance is maintained when the rotating piece 29 is rotated, and it does not rotate about the center shaft 21 in the E direction.

Observation Angle Change by Tilt of Operation Microscope The observation angle of the operation microscope 34 may need to be changed largely depending on the affected part of the patient. For example, in the case of brain surgery, there are cases where the top of the head 76 is operated and cases where the side of the head 76 is operated. In the stand device according to this embodiment, two points of the first and second rotating plates 3 are used for this point.
It was decided to carry out with 0 and 32. That is,

Vertical support: Both the first and second rotary plates 30 and 32 are inward (toward the rotary 28 side of the rotary piece 29) (see FIG. 8).

45 ° support: First, the surgical microscope 34 in the vertically supported state is tilted at 45 ° about the rotation fulcrum 36 [Fig. 9].
(I)〕. The distance d5 between the focal point f ′ at this time and the vertical line S on which the original focal position f was located is the vertical line S and the axis 3
It is exactly twice the distance d4 from the vertical line of 3. Therefore, when the second rotating plate 32 is rotated 180 ° about the axis 33, the focal point f ′ coincides with the vertical line S (FIG. 9B). Then, when the rotating piece 29 is further rotated 180 ° about the rotating fulcrum 28, the focal point f ′ is located on the same vertical line S even though it is tilted 45 °, and the vertical support state is set. It becomes possible to observe from the same direction [Fig. 9
(C)]. Therefore, the same position as the original focal point f can be observed only by slightly moving the surgical microscope 34 up and down by a vertical mechanism (not shown) attached to the surgical microscope 34 itself.

90 ° support: surgical microscope 3 in a vertically supported state
4 is tilted by 90 ° about the rotation fulcrum 36 [Fig.
(I)〕. Distance d6 between the focus f ′ and the vertical line S at this time
Is exactly twice the distance d7 between the vertical line S and the vertical line of the shaft 31. Therefore, when the first rotating plate 30 is rotated by 180 ° about the axis 31, the focal point f ′ coincides with the vertical line S (FIG. 10B). Then, the turning piece 29 is attached to the turning fulcrum 28.
When it is further rotated by 180 ° to the center, the focal point f is located on the same vertical line S even if it is tilted by 90 ° as in the case of the previous 45 ° support, and observation is made from the same direction as the vertical support state. It becomes possible [Fig. 10 (c)].

In the above description, the surgical microscope has been described as an example of the "medical optical device", but the invention is not limited to this and can be widely applied to various medical laser devices and the like. Further, in this embodiment, the floor-standing stand type is used, but the ceiling hanging stand type can also obtain the same effect.

[0024]

Since the stand device for medical optical equipment according to the present invention has the contents described above, the following effects can be obtained.

Even if the parallel link mechanism is deformed, the focus of the medical optical device does not move (fixed at one point), and the focus does not shift during the operation of the parallel link mechanism. This eliminates the need for time, and the operation time can be greatly shortened. Further, since the affected part can be observed from various angles with the focus fixed at one point, the affected part can be observed from the optimum position (direction), and the surgery or the like can be performed more reliably and quickly.

Since the weight of the optical device and the parallel link mechanism and the rotational moment of the parallel link mechanism centering on the center shaft are offset by the pendulum type counter weight, the structure is simple, and abnormal noise and squeaking are heard. A smooth weight balance can be achieved. Further, since the rotatable center shaft is adopted, the counter weight in the rotating direction is not necessary for the balance of the parallel link mechanism and the like, and the structure is extremely simplified.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing a stand device of a medical optical device according to an embodiment of the present invention.

FIG. 2 is a schematic side view showing a weight balance structure of the stand device shown in FIG.

FIG. 3 is a schematic side view seen from the SA direction shown by the arrow in FIG.

FIG. 4 is an operation explanatory view of a parallel link mechanism showing arbitrary adjustment of a front-back direction observation angle of the medical optical device.

FIG. 5 is a partial perspective view showing a swing mechanism of a counterweight by horizontally rotating a rotating piece.

FIG. 6 is a schematic plan view of a stand device showing a back-and-forth movement of a medical optical device.

FIG. 7 is a schematic plan view of a stand device showing a lateral movement of the medical optical device.

FIG. 8 is a side view of the medical optical device showing a vertically supported state.

9A to 9C are side views of the medical optical device showing the process of changing the angle to support 45 °.

10A to 10C are side views of the medical optical device showing the process of changing the angle to 90 ° support.

FIG. 11 is a side view showing a conventional stand device.

FIG. 12 is an operation explanatory diagram corresponding to FIG. 4 showing the movement of the parallel link mechanism in the conventional stand device.

[Explanation of symbols]

 21 Center Shaft 25 Parallel Link Mechanism 26 Base End of Parallel Link Mechanism 29 Rotating Piece (Supporting Part) 31 First Rotating Plate 33 Second Rotating Plate 34 Surgical Microscope (Medical Optical Equipment) 61 Multistage Parallel Link Mechanism W1 First counter weight W2 Second counter weight W3 Third counter weight

Claims (1)

[Claims] 1. A first parallel link provided with two swing link members swinging about a base end portion, and a second parallel link assembled to the first parallel link and interlocking with each other. A parallel link mechanism is formed, and a medical optical device is supported by a distal end link member that maintains a parallel state with the swing link member of the first parallel link in the second parallel link, and the base of the swing link member is supported. An end portion is provided on one end side of a rotatable center shaft, and is oscillated on the other end side of the center shaft in conjunction with the parallel link mechanism, and offsets the weights of the parallel link mechanism and the medical optical device. A counterweight for suspending the medical optical device in the air is hung and supported, and the focus of the medical optical device is positioned and installed on an extension line connecting both base ends of the swing link member. Medical optics Stand device.