JP2022056829A - Mouth switch for surgical microscope - Google Patents

Abstract

To provide a mouth switch for a surgical microscope with improved durability.SOLUTION: A structure in which a control lever 15 is mounted directly to the inner surface of a case 13 via a support part and four function switches are selectively pressed at the rear end of the control lever 15 makes it possible to reliably switch a function corresponding to the tilting direction of the control lever 15 and improves durability. A compact inner structure allows the mouth switch 11 to be stored reliably in a narrow case 13 and prevents the mouth switch from increase in sizes.SELECTED DRAWING: Figure 6

Description

The present invention relates to a mouse switch for a surgical microscope.

In fields such as neurosurgery, surgery is performed in a magnified field of view while observing the surgical site with a surgical microscope. The operating microscope used in this type of surgery has multiple functions such as focus adjustment and zoom adjustment. Since the surgeon keeps his eyes on the eyepiece of the operating microscope and both hands are used for surgery, a mouse switch that can be operated by mouth is used to switch the functions.

The mouse switch is attached to the operating microscope, and by holding the tip of the operating lever protruding toward the operator with the mouth and tilting the operating lever in four directions, up, down, left, and right, the function corresponding to the tilted direction can be obtained. It has become. The operation lever is attached to the stick portion of the joy stick switch, and by tilting the stick portion together with the operation lever, the tilt direction of the operation lever is detected and the function is switched (see, for example, Patent Document 1).

Japanese Patent No. 4458907

However, in such a conventional technique, since the operation lever is attached to the stick portion of the joystick switch, there is a structural limit in improving the durability.

The present invention has been made focusing on such a conventional technique, and provides a mouse switch for a surgical microscope with improved durability.

According to the first technical aspect of the present invention, a case attached to a surgical microscope and an operation lever having a front end protruding from the case toward the operator are provided, and the front end of the operation lever is held by the mouth to move up, down, left and right. A mouse switch for a surgical microscope that can selectively output four types of signals to the electric mechanism of the surgical microscope by tilting in the direction, and supports the middle part of the operating lever on the inner surface of the case. The operating lever can be tilted in four directions, up, down, left, and right, centering on the support, and functional switches that are pushed by the rear end when the operating lever is tilted are provided at four rear locations in the case. It is characterized by that.

According to the second technical aspect of the present invention, the support portion contacts the middle portion of the cross-sectional square in the support arm, and either the front side or the rear side contacts the middle portion in either the vertical direction or the horizontal direction. And the other is a square cylinder shape separated from the middle part, and in the direction of contact with the middle part, it is separated from the inner surface of the case, and in the direction away from the middle part, the box is in contact with the inner surface of the case, and the middle part of the box. The first axis, which penetrates the part in contact with the part and the middle part in that direction, and both ends are not engaged with the inner surface of the case, and the part separated from the middle part and the middle part of the box are orthogonal to the first axis. It penetrates in the direction, and is characterized by being formed from a second axis that penetrates without a gap with the box, penetrates through a gap with the middle part, and both ends engage with the inner surface of the case. do.

According to the third technical aspect of the present invention, the operating lever is provided with a switching lever whose front end position is retracted from the operating lever, and when the operating lever and the switching lever are held together by the mouth, the operating microscope is electrically operated. It is characterized in that four types of selectable signals output to the mechanism unit can be switched to another four types of signals.

According to the first technical aspect of the present invention, the operating lever is directly attached to the inner surface of the case via the support portion, and the four function switches are selectively pressed at the rear end of the operating lever. Functions can be reliably switched according to the tilting direction of the lever, and durability is improved.

According to the second technical aspect of the present invention, the support portion for the case of the operating lever is formed by the intermediate portion and the box, and the first axis and the second axis penetrating them in two orthogonal directions, so that the operation lever is compact. Due to its structure, it can be securely stored in a narrow case, and it is possible to prevent the mouse switch from becoming large.

According to the third technical aspect of the present invention, by holding the switching lever together with the operating lever by mouth, the four selectable functions can be switched to another four types of functions, which can be selected. A total of 8 types of functions can be used.

The perspective view which shows the mouse switch for the surgical microscope which concerns on one Embodiment of this invention. Schematic cross-sectional view showing focus adjustment and zoom adjustment of a surgical microscope. The schematic diagram which shows the visual field movement adjustment. A side view showing the usage state of the mouse switch. A side view showing the stored state of the mouse switch. Cross-sectional view of the mouse switch in the vertical direction. Cross-sectional view of the mouse switch in the horizontal direction. FIG. 7 is an enlarged cross-sectional view showing the DA portion shown by the middle arrow. An enlarged cross-sectional view corresponding to FIG. 8 showing a state in which the rear of the operating lever is tilted to the right. FIG. 6 is an enlarged cross-sectional view showing a DB portion indicated by a middle arrow. An enlarged cross-sectional view corresponding to FIG. 10 showing a state in which the rear side of the operating lever is tilted upward. An exploded perspective view showing the structure of the support portion and the rear part of the operating lever. Front view of a partial cross section showing a box. A rear view of a partial cross section showing a function switch at the rear of the box. A rear view of a partial cross section showing a mounting seat for a function switch at the rear inside the box.

1 to 15 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 operating microscope 1 is supported by a stand device and other supporting mechanisms 2 in the operating room. The support mechanism 2 is provided with an XY drive unit 3 as an “electric mechanism unit”, and the entire surgical microscope 1 can be moved back and forth and left and right.

The surgical microscope 1 is a stereomicroscope having two eyepieces 4, and as shown in FIG. 2, a focus lens 5 is installed in the vertical direction and a zoom lens 6 is installed in the horizontal direction. The focus lens 5 can be focused by a focus adjusting mechanism 7 as an "electric mechanism unit". The zoom lens 6 can be zoomed by the zoom adjusting mechanism 8 as an "electric mechanism unit".

Further, as shown in FIG. 3, by moving the entire surgical microscope 1 in the horizontal direction by the XY drive unit 3, the field of view E being observed can be moved with respect to the surgical unit T.

A fixed bar 9 extending downward is provided between the eyepieces 4 that the surgeon D observes with his / her eyes. A holding arm 10 composed of two foldable arms is provided at the lower part of the fixed bar 9, and a mouse switch 11 is attached via the holding arm 10. The holding arm 10 can be folded as a whole and both upper and lower ends can be rotated by turning and loosening the handle 12, and the mouse switch 11 can be put into a used state (FIG. 4) and a retracted state (FIG. 5). When the handle 12 is returned to its original position and tightened, the used state and the stored state are fixed. The parts of the mouse switch 11, which will be described later, are represented as an integral part even if they are actually formed of a plurality of small parts and function integrally.

A case 13 is rotatably attached to the lower end of the holding arm 10. The case 13 has a long box shape in the front-rear direction, and an outlet 14 is formed on the front side. An operation lever 15 extending along the longitudinal direction of the case 13 is provided inside the case 13, and the front end 16 thereof projects forward from the outlet 14 of the case 13.

A switching lever 17 is rotatably provided around the rotating shaft 24 below the front side of the operating lever 15. The front end 18 of the switching lever 17 also protrudes forward from the outlet 14 of the case 13, but its position is located behind the front end 16 of the operating lever 15. The changeover lever 17 is provided with a downward projecting piece 19, and the lower end thereof pushes the button 21 of the changeover switch 20.

A spring 22 whose rear side is fixed on the switching lever 17 side is provided between the operating lever 15 and the switching lever 17, and the reaction force thereof is caused by the front side of the spring 22 colliding with the lower surface of the operating lever 15. The switching lever 17 is constantly urged downward, and the state in which the lower end of the projecting piece 19 presses the button 21 is maintained. The changeover switch 20 is OFF when the button 21 is pressed, and is ON when the button 21 is released. Since the elastic force of the spring 22 is small, it does not affect the state of the operating lever 15.

The operating lever 15 is attached to the inside of the case 13 via a support portion, and can be tilted up, down, left, and right around the support portion. The structure of this support portion will be described below.

The intermediate portion 23 of the operating lever 15 has a quadrangular cross section, and the box 25 is attached to the intermediate portion 23. The box 25 is basically a square cylinder shape larger than the middle portion 23, and the inner surface is in contact with the left and right side surfaces of the middle portion 23 only on the left and right sides on the front side thereof, and the inner surface is separated from the middle portion 23 in the vertical direction. (See FIG. 13). Further, the box 25 itself is in contact with the inner surface of the case 13 in the vertical direction (FIG. 10), and is separated from each other via the gap S1 in the horizontal direction (FIG. 8). Therefore, the box 25 is restrained in the case 13 in the vertical direction and cannot move, but can move within the range of the gap S1 in the horizontal direction.

On the front side in contact with the intermediate portion 23 of the box 25, the first axis 26 along the left-right direction penetrates. The first shaft 26 penetrates the box 25 and the intermediate portion 23 without a gap, but its left and right ends do not protrude outward from the box 25 and are not engaged with the inner surface of the case 13.

A second axis 27 along the vertical direction penetrates the rear side of the box 25 away from the middle portion 23. The second shaft 27 penetrates the box 25 without a gap, but the intermediate portion 23 penetrates through the gap S2. That is, the through hole 28 in the middle portion 23 through which the second shaft 27 penetrates has a larger diameter than the second shaft 27. Further, the upper and lower ends of the second shaft 27 project from the box 25 and engage with the inner surface of the case 13. The "support portion" in this embodiment is formed by the intermediate portion 23, the box 25, the first shaft 26, and the second shaft 27.

For such a support portion, when the operator D holds the front end of the operating lever 15 with the mouth 30 via the mask 29 and moves it to the left or right in that state, the operating lever 15 moves as shown in FIGS. 8A and 9. Tilt left and right around the second axis 27. There is a gap S2 between the second shaft 27 and the through hole 28, but since the second shaft 27 penetrates the box 25 without a gap, it can be tilted to the left or right without backlash.

When the front end 16 of the operating lever 15 is moved up and down, the operating lever 15 tilts up and down with respect to the first axis 26 as shown in FIGS. 10 and 11. Since the box 25 is in contact with the inner surface of the case 13 in the vertical direction and the movement is restricted, the box 25 is immovable, and the intermediate portion 23 is tilted in the vertical direction in the box 25. At this time, the second shaft 27 is also immobile because both the upper and lower ends are engaged with the inner surface of the case 13, but the gap S2 is secured because the diameter of the through hole 28 through which the second shaft 27 penetrates is large. Therefore, the tilting of the intermediate portion 23 with respect to the second axis 27 is allowed within the range of the gap S2. Since this support portion has a compact structure using the first shaft 26 and the second shaft 27, it can be reliably stored in the internal space of the narrow case 13.

The rear end of the operating lever 15 penetrates the opening 32 of the mounting plate 31 formed behind the case 13 and extends rearward. The opening 32 has a larger diameter than the operating lever 15, and a gap S3 is secured around the opening 32 and the operating lever 15, and the operating lever 15 can move up, down, left, and right within the range of the gap S3. ..

The operation lever 15 on the front side of the mounting plate 31 is provided with a spring 33 that comes into contact with each other from the top, bottom, left, and right. The spring 33 is housed in a tubular portion 34 integrally formed on the case 13 side, covered with an adjusting screw 35, and housed in the tubular portion 34.

The adjusting screw 35 is screwed with a female screw (not shown) formed on the inner surface of the tubular portion 34, and the elasticity of the spring 33 is adjusted by pushing the spring 33 with the adjusting screw 35. Since the operating lever 15 is pushed from all sides by the spring 33 with the optimum elasticity, it is located at the center of the opening 32 of the mounting plate 31.

At the rear end of the operating lever 15 that has passed through the opening 32, an operating piece 36 extending in four directions is formed at the terminal thereof. Each operation piece 36 projects in the radial direction from one side of the rear end of the operation lever 15. Four mounting seats 37 are formed at adjacent positions in the opening 32 of the mounting plate 31, and a function switch 38 is mounted on each of the mounting seats 37. Each function switch 38 is connected to the focus adjustment mechanism 7, the zoom adjustment mechanism 8, and the XY drive unit 3, respectively.

The button 39 of this function switch 38 corresponds to the operation piece 36 in a close state, and when only the front end 16 of the operation lever 15 is moved, the operation lever 15 tilts around the first axis 26 or the second axis 27. Then, the operation piece 36 moves in the direction opposite to the front end 16 and presses the button 39 of the corresponding function switch 38. When the button 39 of the function switch 38 is pressed, a signal is output from the function switch 38 only to the focus adjustment mechanism 7 and the zoom adjustment mechanism 8. Specifically, the four types of signals are four types of focus-up and focus-down in the vertical direction and zoom-up and zoom-down in the left-right direction.

Then, when the front end 18 of the changeover lever 17 is held and moved by the mouth 30 together with the front end 16 of the operation lever 15, the button 21 of the changeover switch 20 is released and turned ON, and is output from each function switch 38. The four types of signals are switched to another four types. Specifically, four types of signals are output from each function switch 38 only to the XY drive unit 3. As shown in FIG. 3, the four types of signals are the Y direction (+) and the Y direction (-), and the X direction (+) and the X direction (-) regarding the visual field movement corresponding to the movement direction of the operating lever 15. ).

Since the front end 18 of the switching lever 17 is retracted from the front end 16 of the operating lever 15, it is necessary to intentionally hold the operating lever 15 deeply, and there is no concern that the front end 18 of the switching lever 17 is accidentally held.

According to this embodiment, as described above, the intermediate portion 23 of the operation lever 15 is directly attached to the inner surface of the case 13 via the support portion, and the four function switches 38 are pushed by the rear end of the operation lever 15. Therefore, the function can be reliably switched according to the tilting direction of the operation lever 15, and the durability is improved.

In the above description, the first axis 26 is on the front side and the second axis 27 is on the rear side, but the reverse is also possible. Further, the directions of the first axis 26 and the second axis 27 may be changed by 90 degrees together.

1 Operating microscope 3 XY drive unit (electric mechanism unit)
5 Focus lens 6 Zoom lens 7 Focus adjustment mechanism (electric mechanism)
8 Zoom adjustment mechanism (electric mechanism)
11 Mouse switch 13 Case 15 Operation lever 17 Switching lever 23 Midway part (support part)
25 box (support part)
26 1st axis (support part)
27 2nd axis (support part)
D Operator E Field of view T Operation part S1, S2, S3 Gap

Claims (3)

It is equipped with a case that can be attached to the operating microscope and an operating lever whose front end protrudes toward the operator from the case. It is a mouse switch for a surgical microscope that can selectively output four types of signals.
The middle part of the operation lever is supported on the inner surface of the case, and the operation lever can be tilted in four directions of up, down, left, and right around the support part.
A mouse switch for a surgical microscope characterized in that functional switches that are pushed by the rear end to operate when the operating lever is tilted are provided at four rear positions in the case. The support part
The middle part of the cross-section quadrangle in the support arm and
One of the front side and the rear side is in the shape of a square cylinder that is in contact with the middle part in either the vertical direction or the left-right direction and the other is separated from the middle part. And in the direction away from the middle part, the box in contact with the inner surface of the case,
The first axis, which penetrates the part of the box in contact with the middle part and the middle part in that direction, and both ends are not engaged with the inner surface of the case.
It penetrates the part of the box separated from the middle part and the middle part in the direction orthogonal to the first axis, penetrates the box without a gap and penetrates the middle part through the gap, and both ends of the case. The second axis that engages with the inner surface,
The mouse switch for a surgical microscope according to claim 1, wherein the mouse switch is formed of. The operation lever is provided with a switching lever whose front end position is retracted from the operation lever.
A claim characterized in that when the operation lever and the switching lever are held together by mouth, the four selectable signals output to the electric mechanism of the operating microscope can be switched to another four types of signals. The mouse switch for the surgical microscope according to claim 1 or 2.

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