JPH07143995A - Stand device for optical instrument for medical treatment - Google Patents

Abstract

PURPOSE:To provide a stand device for optical instrument for medical treatment wherein balance adjustment to change in weight of an operational microscope side can be easily and reliably performed by only one counter weight. CONSTITUTION:The intermediate part 4a of a holding link mechanism 4 made up of the first parallel link 2 and the second parallel link 3 interlocking with each other is attached movably in the vertical direction to a rotating support S of a trestle 1. In addition, an optical instrument W1 for medical treatment and/or its auxiliary instruments W2 and W3 is held on the end of a supporting arm 5 formed by extending a part of the first parallel link 2 in the horizontal direction and a movable counter weight W4 is held on the end of a weight holding arm 6 formed by extending a part of the second parallel link 3 in the horizontal direction on the opposite side to the supporting arm 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention is applicable to microsurgery (MICROS
In the case of URGERY), the present invention relates to a stand device that can stop a surgical microscope, which is a heavy object, and its accessory equipment at a desired spatial position.

[0002]

2. Description of the Related Art In the field of brain surgery and heart surgery,
There is what is called microscopic surgery (MICROSURGERY), in which surgery is performed while observing the affected area with a surgical microscope as a "medical optical device". For use in such microscopic surgery, various types of stands have been proposed that can hold a surgical microscope, which is a heavy object, and its accessories in a desired aerial position (see, for example, JP-A-56-32110). . This type of stand generally supports a midway portion of a holding link mechanism using parallel links on a mount so as to be rotatable (tilting freely), and holds a surgical microscope at one end of the holding link mechanism to support a turning fulcrum. A balance structure is provided with a counterweight for offsetting the weight of the surgical microscope at the end opposite to the one sandwiching it.

The optimum location of the balance stand is selected in the operating room according to the contents of the surgery to be performed, and the balance is adjusted there. Since an auxiliary device such as a side endoscope for an assistant doctor or a video camera is also attached to the surgical microscope, the position of the counter weight is changed according to the weight of the surgical microscope to adjust the overall balance.

[0004]

However, in the case of this type of stand device, in order to suspend the surgical microscope and the accessory in the air at a desired spatial position, the balance of the surgical microscope in both the horizontal and vertical directions is required. Although it is necessary to take it completely, the conventional stand has a structure that allows easy and reliable balance adjustment in both horizontal and vertical directions against the weight of the surgical microscope side, which changes depending on the presence of various accessories. There wasn't. Therefore, as a countermeasure,
There has been proposed a type in which two counter weights are provided so as to be movable in the vertical direction and the vertical direction, and the two counterweights are moved in conjunction with each other to adjust the balance in the horizontal direction and the vertical direction. The structure for moving the two counterweights in conjunction with each other at the same time is complicated and large in size, which is not preferable in terms of weight and cost.

The present invention was made by paying attention to such a conventional technique, and even one counter weight is
(EN) A stand device for a medical optical device capable of easily and surely performing balance adjustment with respect to a weight change on the side of an operating microscope.

[0006]

In order to achieve the above-mentioned object, a stand device for a medical optical device according to the present invention comprises a holding link mechanism composed of a first parallel link and a second parallel link interlocking with each other. Attach the middle part of the so that it can move freely in the vertical direction with respect to the rotation fulcrum of the frame,
A medical optical device and / or its accessory device is held at the tip of a support arm formed by horizontally extending a part of the first parallel link, and a part of the second parallel link is the support arm. The movable counterweight is held at the tip of a weight holding arm formed by extending in the horizontal direction on the opposite side. The holding link mechanism may be moved in the horizontal direction and the counterweight may be moved in the vertical direction.

[0007]

According to the present invention, the balance in the horizontal direction can be adjusted by moving the counterweight in the horizontal direction, and the balance in the vertical direction can be adjusted by moving the entire holding link mechanism in the vertical direction. it can.
As described above, only one counterweight is required, and it is not necessary to move two counterweights in conjunction with each other as in the conventional case. Therefore, the movement control of the counterweight is easy and the mechanism therefor can be simplified. Further, since the balance in the vertical direction is performed by moving the entire holding link mechanism, efficient balance adjustment can be performed even with a small amount of movement. Therefore, balance adjustment work is easy,
The time required for balance adjustment can be shortened.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to FIGS.
It will be described based on. In the figure, A is the front and B is the rear.

In the stand of this embodiment, a part (a midway portion 4a) of a holding link mechanism 4 composed of a first parallel link 2 and a second parallel link 3 is supported at a rotation fulcrum S of a gantry 1, 1) A surgical microscope W ₁ or the like is held at the tip of a support arm 5 formed by extending a part of the parallel link 2 to the front side.
It has a basic structure in which a weight holding arm 6 formed by extending a part of the parallel link 3 to the rear side is provided with a movable counterweight W ₄ . The support arm 5 is curved upward and has a structure that is unlikely to interfere with the doctor's head.

A vertical tip arm 7 is rotatably supported at the tip of the support arm 5, and a small supporting parallel link 8 in which two parallel links are interlocked is provided below the tip arm 7. There is. Then, a surgical microscope (medical optical device) W ₁ is attached to the lowermost portion of the supporting parallel link 8. Since the supporting parallel link 8 has a curved shape as a whole, the doctor can easily operate the surgical microscope W ₁ . The change in the observation angle of the surgical microscope W ₁ is
This can be done by deforming the supporting parallel link 8. Further, this surgical microscope W _1, side endoscope W ₂ for assistant doctors and a video camera W ₃ for recording is attached as "auxiliary components", these "accessories"
By attaching and detaching the surgical microscope W
The weight on side ₁ changes.

An L-shaped crank member 9 is pivotally supported at a connection point which is the starting point of the support arm 5, and one end of the crank member 9 is connected to the upper end of the tip arm 7 via a horizontal sub-arm 10. And the other end is connected to the gantry 1 via the vertical sub-arm 11. The vertical sub-arm 11 is divided into an upper part and a lower part, and they are connected by an intermediate length adjusting part 12. By adjusting the degree of insertion into the length adjusting part 12, the total length can be changed. With the crank member 9 and the vertical / horizontal sub-arms 10 and 11, even if the holding link mechanism 4 rotates about the rotation fulcrum S, the crank member 9 does not rotate. Is always maintained in a vertical state, and as a result, the supporting parallel link 8 for supporting the surgical microscope W _{1 and the} like.
Even if it does not fall, the vertical state is always maintained.

On the other hand, a counter weight W ₄ is movably attached to a weight holding arm 6 extending rearward from the second parallel link 3. That is, the weight holding arm 6 is threaded, and the counter weight W ₄ is screwed into the weight holding arm 6, and the counter weight W ₄ can be moved by rotating the counter weight W ₄ .

The holding link mechanism 4 having the above structure is fixed to the gantry 1 via the slide mechanism 13. The slide mechanism 13 is rotatably attached to the rotation fulcrum S of the pedestal 1, and has a fixed portion 15 provided with a rotatable long screw 14 in a vertical state, and a holding link mechanism 4 side and the long screw 14. And a movable part 17 having a projecting piece 16 that is screwed into the. Therefore, by rotating the long screw 14, the holding link mechanism 4 moves in the direction perpendicular to the rotation fulcrum S. Since the distance between the gantry 1 and the crank member 9 changes as the holding link mechanism 4 moves in the vertical direction, the length adjusting unit 12 adjusts the length of the vertical sub-arm 11.

Next, the balance state of the stand device will be described. The total weight of the surgical microscope W ₁ , side endoscope W ₂ , and video camera W ₃ supported by the tip of the support arm 5 will be described as a surgical microscope W (= W ₁ + W ₂ + W ₃ ). In order to stop the surgical microscope W etc. in the air at an arbitrary position, the balance of the holding link mechanism 4 must be adjusted in both the horizontal direction and the vertical direction as described above. That is, from the rotation fulcrum S to the surgical microscope W, etc.
To the counterweight W ₄ , the horizontal distance to the counterweight W ₄ is X ₁ , the vertical distance from the rotation fulcrum S to the surgical microscope W, etc. is Y, and the vertical distance to the counterweight W ₄ is Y _1. , Must satisfy the following formula.

Horizontal balance: W × X = W ₄ × X ₁ Vertical balance: W × Y = W ₄ × Y ₁

From this state, if the side endoscope W ₂ is detached and the one supported by the holding link mechanism 4 becomes a surgical microscope W-W ₂ and becomes lighter, the balance will be lost, so that Need to be corrected.

For that purpose, in order to balance in the horizontal direction, the counterweight W ₄ is attached to a surgical microscope W-W ₂ or the like.
Is moved by X ₂ minutes in a direction close to and rotates the long screw 14 in order to balance the vertically lifting the retaining link mechanism 4, the relative position of the pivot point S with respect to the retaining link mechanism 4 Y ₂ minutes down.

The above-mentioned X ₂ and Y ₂ are quantities satisfying the following equations, respectively. Horizontal _{balance: (W-W 2) ×} X = W 4 × (X 1 -
X ₂ ) Vertical balance: (W−W ₂ ) × Y = W ₄ × (Y ₁ −
Y ₂ )

[0019] FIG movement amount Y ₂ in the vertical direction of the holding link mechanism 4 is 4 in the are illustrated on the movement amount to the same extent as on the horizontal direction of the counterweight W _4, in practice than in X ₂ Y ₂ is sufficiently small. because,
This is because the holding link mechanism 4 as a whole moves, so a large balance adjustment effect can be obtained even with a slight movement.

Furthermore, in the above description, the counter weight W ₄ is moved in the horizontal direction, and the holding link mechanism 4 is moved in the vertical direction, but the structure may be reversed.

Although the floor installation type in which the gantry 1 is installed on the floor is taken as an example, a ceiling installation type in which the gantry 1 is suspended on the ceiling of the operating room may be used.

In addition, as the "accessory device", a side endoscope W is used.
It is not limited to ₂ and the video camera W ₂ , but may be other ones.

[0023]

As described above, the stand device for a medical optical device according to the present invention requires only one counterweight, and it is necessary to move two counterweights at the same time as in the conventional case. Since it is not provided, the movement control of the counter weight is easy and the mechanism therefor can be simplified. Further, since the balance in the vertical direction is performed by moving the entire holding link mechanism, efficient balance adjustment can be performed even with a small amount of movement. Therefore, the balance adjustment work is easy, and the time required for the balance adjustment can be shortened.

[Brief description of drawings]

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

FIG. 2 is a side view of a partial cross section as seen from the direction of arrow DA in FIG.

FIG. 3 is an explanatory diagram showing a state in which the total weight of the surgical microscope, the side endoscope, and the video camera is balanced with the counter weight.

FIG. 4 is an explanatory diagram showing a state in which the weights of the surgical microscope and the video camera are balanced with the counter weight.

[Explanation of symbols]

1 mount 2 first parallel link 3 second parallel link 4 holding link mechanism 4a middle part 5 support arm 6 weight holding arm S rotation fulcrum W ₁ surgical microscope (medical optical equipment) W ₂ side scope (accessory equipment) W ₃ video camera (accessory) W ₄ counter weight

Claims (2)

[Claims] 1. A first parallel link and a second interlocking link with each other.
A support arm formed by attaching an intermediate part of a holding link mechanism composed of parallel links so as to be movable in a vertical direction with respect to a rotation fulcrum of a gantry and extending a part of the first parallel link in a horizontal direction. A counter capable of holding a medical optical device and / or its accessory device at the tip of the arm, and movable to a weight holding arm formed by extending a part of the second parallel link in the horizontal direction opposite to the support arm. A stand device for medical optical equipment, characterized in that a weight is provided. 2. A weight holding arm is extended in a vertical direction, a movable counterweight is provided on the weight holding arm, and an intermediate portion of the holding link mechanism is attached movably in a horizontal direction with respect to a rotation fulcrum of a gantry. The stand device for medical optical equipment according to claim 1.