JPH0310735Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] TECHNICAL FIELD The present invention relates to a multiple illumination lamp for surgery.

[Conventional technology]

The main requirements for a surgical lighting lamp include the ability to provide sufficient illuminance necessary for surgery, the ability to vary the size of the light field depending on the purpose of the surgery, and good operability. Regarding the size of the light field, as shown in the surgical diagram shown in Figure 1, a wide illumination range of 20 to 30 cm square is required for the incision of the skin area A at the beginning of the surgery, and then for the area B after the incision.
Surgery requires narrowing down the optical field. Furthermore, in order to increase the illuminance, a predetermined surgical area may be illuminated with a plurality of illumination lights. In other words, a focus function is required to converge the optical axis of each lamp's reflector to one point.

In conventional surgical multi-light illumination lights, the only function available for focusing was to manually bring the optical axes of the reflectors of each light to a single point. Therefore, when changing the size of the light field, each light is
The size of the light field was adjusted by shifting the optical axes S ₁ to _{S 4} of the reflecting mirrors L ₁ to L ₄ .

[Problem that the invention attempts to solve]

However, when manually adjusting the focus, it is necessary to visually check the focus of light on the affected area and adjust it to maximize the illuminance. It wasn't easy.

Furthermore, changing the light field by shifting the optical axis not only causes a decrease in illuminance and uneven illuminance, but also impairs the shadowless effect, which is one of the major requirements for surgical lighting. For example, as shown in FIG. 11, when an obstacle R falls within the light beam Q, its shadow R' is formed on the irradiation surface C. However, if this shadow R' is irradiated with a beam of light P, it is possible to eliminate the shadow R'.
In other words, it is necessary that the optical axes from each direction coincide on the irradiation surface, which can be said to be the principle when using a surgical lighting lamp. The conventional method of varying the light field by shifting the optical axis of each lamp is a mistake and has the disadvantage of impairing the shadowless effect.

Furthermore, in the conventional system, the operation of the variable light field device and the operation of the focus adjustment device are not related to each other, and are operated separately. For this reason, the demand for shortening the time required for surgery has not been satisfied.

The present invention was developed in view of the above points, and it automates the focus adjustment work, and when the optical field variable operation is completed, the focus adjustment device is automatically activated to shorten the adjustment operation time and make the surgery smoother. The purpose of the present invention is to provide a multi-lamp type illumination lamp for surgery that can be performed.

[Means for solving problems and their effects]

In order to solve the above problems, in the present invention, one light source is provided on the optical axis of one reflecting mirror, and a lighting lamp that reflects and condenses the luminous flux emitted from the light source by the reflecting mirror. Arrange multiple pieces of
Each of the individual reflecting mirrors is driven by a motor and tilted in a direction to condense light simultaneously to adjust the focus to a predetermined position of the surgically affected area, wherein the light field variable device of the plurality of illumination lights and the optical field variable device for the plurality of illumination lamps are adjusted to a predetermined position of the surgically affected area. an automatic focus adjustment device, a start switch of the automatic focus adjustment device is configured to be linked to completion of adjustment of a rotatable handle that changes the light field of the variable light field device in steps, a rotatable handle; a means for transmitting rotational force of the handle;
The automatic focus adjustment device includes a light source up and down function for simultaneously moving the light sources of the plurality of illumination lights up and down in the same direction by the transmission force, and the automatic focus adjustment device focuses the reflected light flux from the focal point of the surgically affected area. A lens 25 that is optically attached to the housing of the multi-light illumination lamp, a slit 25a on the back of the lens, an optical sensor 26 for the light flux passing through the slit, and an input signal via the optical sensor. a falling detection circuit 28 that detects a falling illuminance change in the focal light field of the surgically affected area and sends a motor stop signal to the on/off relay circuit 22 of the motor that tilts the individual reflector; , a correction circuit 29 having a timer that sends a start signal for the motor to the motor on/off relay circuit 22 for a predetermined time after a set time in response to the fall detection signal from the fall detection circuit; A motor rotation direction relay that changes the rotation direction of the motor in response to a fall detection signal from the fall detection circuit 28 while an off signal is input from the motor on/off relay circuit 22 that does not tilt the individual reflector. It is characterized by consisting of a circuit 23.

With the above configuration, the light field can be easily adjusted by rotating the handle without impairing the shadowless effect, and the focus can be automatically adjusted in conjunction with the light field variable operation.

〔Example〕

Before explaining one embodiment of the present invention with reference to the drawings, a conventional focusing system will be explained below.
FIG. 1 is a schematic diagram at the time of surgery. Reference numeral 1 denotes a multiple surgical lighting lamp that is hung from the ceiling 2 of the operating room. In this embodiment, one multi-light illumination light 1 is provided on one base shaft 5, but it goes without saying that there may be a plurality of multi-light illumination lights 1. The multiple illumination light 1 is rotatable in the horizontal direction by arms 6 and 7, and vertically movable by the arm 8 and boom 9, and the irradiation angle X is also set relative to the boom 9. It can be freely changed by rotating the multi-light illumination light 1.

FIG. 5 is a partial plan view of the multiple illumination lamp 1,
FIG. 6 is a sectional view taken along line YY' in FIG. As shown in FIG. 6, the multiple illumination light 1 includes the boom 9.
Both ends thereof are rotatably attached to a substantially ring-shaped outer frame 11 via attachment members 10. An outer cover 12 is attached to the upper opening portion of the outer frame 11 with a stopper 13 with a predetermined gap between the outer cover 12 and the upper end of the outer frame 11 .

The lower end cover 21 of the outer frame 11 has a ring-shaped frame 14 for supporting four illumination lights _L1 to _L4 .
Four are placed around the circumference at a predetermined angle. That is, reflecting mirrors 15 for the illumination lights L ₁ to _{L 4} are rotatably supported on the ring frame 14 by a rotating shaft 16 (FIGS. 5 and 6), and are fixed to the reflecting mirrors 15. The protruding piece 17 (FIGS. 5 and 6) that has been provided is also pivoted on the ring-shaped frame 14 in the same manner. Further, a motor 18 is fixedly installed in the center of the multiple illumination lamp 1, and a disk 19 that is rotated by the motor is also attached to the shaft of the motor 18. On the circumference of the disc 19, four link rods 20 are mounted at 90° intervals, with their tip ends 20a pivoted. The other end 20b of the link rod 20 holds a protrusion 17 fixed to the reflecting mirror 15.

In the above-mentioned conventional system, the automatic focus adjustment device of the present invention has a lens 25 and a slit 25a attached to the center of the housing of the multiple illumination lamp, as shown in FIG.
, an optical sensor 26 which receives the light flux passing through the slit 25a as an input signal, and a fall detection circuit 28 which detects the fall of illuminance change in the focal light field of the surgically affected area based on the input signal via the optical sensor. After a set time has elapsed since the output signal from the fall detection circuit 28 was applied, the power to the correction circuit 29 equipped with a timer and the motor 18 for tilting the individual reflectors is turned on and off when the output signal is sent for a predetermined time. At the same time, a signal is applied when the fall detection circuit 28 detects a fall, and the motor 18 is controlled to be turned off, and the motor 18 is controlled to be turned on during the sending time of the output signal of the timer included in the correction circuit 29. The on-off relay circuit 22 of the motor 18 that is output from the on-off relay circuit 22 and the inverted signal from the falling detection circuit 28 during the input of the off signal that does not tilt the individual reflector from the output signal of the on-off relay circuit 22. and a motor rotation direction relay circuit 23 to which the rotation direction of the motor 18 can be changed by adding a motor. 24
is a start switch, and 27 is an amplifier.

The lens 25, the slit 25a, the optical sensor 26, and the amplifier 27 are attached to the center of the lower end cover 21 of the multiple illumination lamp 1 as shown in FIG. - The off relay circuit 22 and the motor rotation direction relay circuit 23 are both electronic circuits or small relays built into the printed circuit board, so the multi-light type lighting 1
is installed at an appropriate location on the housing. Also, a limit switch 30 (consisting of an up limit switch and a down limit switch), a position detection device 3
1 and rotational direction switching means 32 are attached to the shaft of the motor 18 (not shown in FIG. 6), and a limit switch 30 limits the tilting angle to prevent the reflector of each illumination light from tilting too much and being damaged. ,
The position detection device 31 detects the tilting side of the reflecting mirror and determines the rotation direction of the motor 18 so that the optical axis is directed toward the center at the start.

FIG. 12 is shown as an example of configuring the control block diagram shown in FIG. 7 into an electric circuit. This will be explained below.

24 is a start switch.

Block 22 is a motor on/off relay circuit, which includes a step counter that advances each control step, a decoder that analyzes the signal of this step counter, and sends out each step signal.
a data flip-flop circuit 32 that controls the rotational direction when the motor is started based on an input signal from a center detection sensor 31 that detects the tilting side of the reflector;
AND circuits 70, 71, which send out motor drive signals based on the input signal from this data flip-flop circuit and the signals from control step 2 and step 4.
72 and 73.

Block 28 is a falling detection circuit, which includes the step counter and decoder, an AND circuit,
It consists of an OR circuit.

Block 29 is a correction circuit, which is comprised of a timer that sends a pulse signal to the step counter at the settling time of each timer to advance the control step.

Block 23 is a motor rotation direction relay circuit, which includes relays R ₁ and R ₂ for driving the motor in either clockwise or counterclockwise direction, and an input signal from limit switch 30 to generate an emergency stop signal for motor 18. It is composed of AND circuits 74, 75, etc. for sending out data. UP test SW and DOWN test SW are provided for testing.

The block 27 is an amplifier section that sends out an H signal when the luminous flux increases and then decreases as detected by the luminous flux sensor 26.

The operation of the above configuration will be explained. When the start switch 24 is turned on, the initial reset circuit clears the step counter to zero and enters control step 0 (signal lines are omitted). In this step, the entire device is put into a startup mode. In response to activation of each part, the step counter enters control step 1. In response to this signal, timer _T1 of the correction circuit 29 is activated. During this time, the signal of control step 1 becomes the set input of the data flip-flop circuit 32, and the D terminal input at this time becomes the Q terminal and ^Q terminal output as it is, and the AND circuits 70, 71, 7
2,73. In this case, for example, it is preset that when the output signal of the center detection sensor 31 is at H level, it is a clockwise rotation signal of the motor 18, and when it is at L level, it is a counterclockwise rotation signal. Timer T ₁ above
The settling time is set at the end of the Q terminal and ^Q terminal outputs, and when the Q terminal and ^Q terminal outputs end, the timer _T1 outputs a pulse signal indicating completion of direction setting to the step counter. The step counter receives this signal and enters control step 2. The signal of this control step 2 is the AND circuit 7
0 and 73 are input. For example, if the Q terminal output of the data flip-flop circuit 32 is H and ^{the Q} terminal output is L, then the AND circuits 70, 71, 72, 7
As for each input terminal of 3, AND70 is LH, AND71 is
HL, AND72 becomes LH, AND73 becomes HH,
It can be seen that AND73 is in the active state. Therefore, the output signal of AND circuit 73 activates relay R ₂ and motor 18 rotates. Control step 2
The signal is also input to the AND circuit 76. While the luminous flux continues to rise as detected by the sensor 26, the amplifier unit 27 outputs the L signal, so the step counter maintains control step 2, the motor 18 continues to rotate, and the focus adjustment operation continues. When the luminous flux stops rising and starts falling, the amplifier section 27 outputs a fall detection signal, and the step counter receives this and advances the control to step 3.
This signal activates timer _T2 of correction circuit 29. AND circuits 70, 71, 72 in this case,
Each input terminal of 73 is AND70 is LL, AND71 is
is HL, AND72 is LL, AND73 is HL, and nothing is active, so the relay
Both R ₁ and R ₂ are turned OFF and the motor 18 stops. The settling time of the timer _T2 is set when the motor 18 is stopped. The step counter is
Upon receiving the inversion wait signal from timer _T2 , control proceeds to control step 4. The input terminals of AND circuits 70, 71, 72, and 73 in control step 4 are LL for AND7, HH for AND71, and HH for AND7.
2 becomes LH, AND73 becomes HL, AND circuit 7
1 is in active state. Therefore, relay _R1 is ON
As a result, the motor 18 rotates in the opposite direction. This rotation time lasts for the settling time of timer _T3 which receives the signal from control step 4.
This is an operation for correcting over-adjustment of focus. After receiving the motor reversal signal after the settling time of timer _T3 , the step counter advances control to step 5.
This signal at step 5 is a step counter reset signal, and the automatic focus adjustment operation is thereby completed.

The UP limit SW and DOWN limit SW turn ON when the reflecting mirror tilts more than a certain level, and the AND
A signal is output to circuits 74 and 75, relay R ₁ or R ₂ is turned OFF, and motor 18 is stopped. Furthermore, a reset signal is sent to the step counter to return control to step 0.

Next, we will discuss the vertical movement mechanism of the light source when changing the light field. Figure 3 (same as Figure 5) and Figure 4
In the figure (YY' sectional view of FIG. 3, which is the same as FIG. 6), 3 is a handle, and a rod member 52 that moves forward and backward via a transmission screw 51 by rotating the handle; Wires 54 for moving the light source up and down are attached to attachment members 53a provided at 90° intervals on the ring body 53 to which the other end 52b of the rod member is fixed. The ends of the wires 54 each have lighting lights.
Buffer spring 5 provided at the base of L ₁ to _{L 4}
5 (FIG. 4) to the base 56 of the light source lamp 56.
Connected to a. Reference numeral 57 denotes a guide portion for vertical movement of the light source lamp 56.

Further, the rotatable handle for varying the light field of the light field variable device is provided with a switch mechanism having mechanical contacts that turn on and off depending on the rotation angle of the handle. This switch mechanism serves as a start switch for a relay circuit (FIG. 13) interposed between the variable light field device and the automatic focus adjustment device. This will be explained below.

As shown in FIGS. 3 to 6, this switch mechanism includes an eccentric cam 61 fixed to a shaft 60 connected to a handle 3 that changes the light field, and a switch 62 provided below the eccentric cam 61. It consists of This switch 62 is connected to the bracket 63.
It is fixedly installed. FIG. 14 is an explanatory diagram of the operation of the switch mechanism. In the figure, A is the angle of the handle 3 that makes the light field large, and C is the angle of the handle 3 that makes the light field small. Set the handle angle to A,
By switching to either C, the light field can be switched to two levels: large and small. In this case, handle 3
is in either position A or C, the eccentric cam 6
1 does not touch the switch 62, so the switch 6
2 is OFF. When the handle 3 is rotated in either direction A or C to switch the light field, the eccentric cam 61 contacts the switch 62 at a position B where the handle 3 and the switch 62 overlap, and the switch 62 is turned on.

As mentioned above, FIG. 13 shows a relay circuit interposed between the variable light field device and the automatic focus adjustment device. In the figure, P-1 is a contact of the switch 62, _R1 is a relay, and _r1-1 and _r1-2 are contacts of this relay _R1 . _T1 is the start switch 2 of the automatic focus adjustment device after the light field variable operation is completed.
This is a timer to turn on 4, t ₁ −1, t ₁
-2 is the contact point of this timer _T1 . _T2 is a timer for cutting off the current in this relay circuit after the automatic focus adjustment operation is completed, and _t2-1 is a contact point of this timer _T2 .

The operation of this relay circuit will be explained. When the switch 62 is turned on by operating the handle 3,
Contact P-1 of this relay circuit turns ON. This causes an exciting current to flow through relay R ₁ and contacts r ₁ −
1, r ₁ -2 is turned on. While self-holding is applied by r ₁ -1, ON/OFF operation of contact P-1 due to rotation of handle 3 is ignored. On the other hand, when the r ₁ -2 contact turns on, current flows through the timer T ₁ , and after the timer has settled, the contacts t ₁ -1 and t ₁ -2 turn on.
It becomes ON. t ₁ -2 is a contact point of the start switch 24 of the automatic focus adjustment device. That is, the timer
_T1 has a delay effect of turning on the start switch of the automatic focus adjustment device after the optical field variable operation is completed. On the other hand, when the contact t ₁ -1 is turned ON, current flows through the timer T ₂ , and after the timer has settled, the normally closed contact t ₂ -1 is turned ON, and the current to the relay R ₁ is cut off. That is, the timer _T2 performs a delay action to cut off the current in the relay circuit after the autofocus operation is completed.

Next, the operation will be explained.

First, adjust the light field. In FIGS. 3 and 4, when the handle 3 is manually turned clockwise, the rod member 52 is rotated clockwise via the transmission screw 51. As shown in FIGS. Since the rod member 52 is fixed to the ring body 53, the ring body 53 also rotates clockwise. Further, since the tips of the four wires 54 attached to the mounting member 53a of the ring body 53 are connected to the base portions 56a of the light source lamps 56 of the illumination lamps _L1 to _L4 , the rotation of the ring body 53 Accordingly, the light source lamp 56 and the wire 54 are guided by the vertical movement guide section 57 and ascend. For this reason, the light source lamp 56 approaches the reflecting mirror, so the incident angle of the reflecting mirror changes, the reflected light is diffused, and the light field becomes larger (FIG. 2A). Next, when the handle 3 is turned counterclockwise, the wire 54 is loosened, causing the spring 55 at the tip of the wire to move the light source lamp 56 away from the reflector, converging the reflected light, and expanding the light field. becomes small.
(Figure 2b).

By adjusting the rotatable handle of the variable light field device, the size of the light field is selected to the desired size;
In conjunction with the completion of the above adjustment of the handle, the automatic focus adjustment device activation switch is activated by the timer circuit (13th
(Figure). This timer circuit is a conventionally known circuit, and turns on the start switch of the automatic focus adjustment device for a predetermined time after the time set in the timer has elapsed.

When the start switch 24 of the automatic focus adjustment device is turned on, the motor 18 rotates so that the optical axis points toward the center, and with this rotation, the disc 1
9 rotates clockwise, for example. Four link rods 20 each pivoted at 90° intervals on the circumference of the disk 19 work together to provide a force that pushes the protrusion 17 held by the tip end 20b of the link rod 20, At the same time, each of the reflecting mirrors disposed around the disk 19 to which the projecting piece 17 is fixed is also moved upward about the pivot shaft 16 to raise the optical axis focal point of each reflecting mirror. As shown in FIGS. 7 and 8, the optical sensor 26 detects the light flux constantly passing through the lens 25, and the falling detection circuit 26 detects the light flux constantly passing through the lens 25.
8 outputs an on signal to the motor on/off relay circuit 22, and the motor 18 continues to rotate.

When the input of the optical sensor 26 passes the peak, a fall detection circuit 28 outputs an off signal to the motor on/off relay circuit 22, and the motor 18 stops. At the same time, the fall detection circuit 28 outputs an inverted output signal to the motor rotation direction relay circuit 23, and
An output signal is sent to the modification circuit 29, and the modification circuit 29 turns the motor on/off for a predetermined time after the set time.
By turning on the relay circuit 22, the motor 18 is reversed for a predetermined period of time, and the input of the optical sensor 26 is fixed at the peak point. The predetermined time is adjusted by the timer of the modification circuit 29 so that the optical axis is focused on the surgical site A. That is, the optical axis is automatically focused on the surgical site A.

[Effect of idea]

As explained above, in the present invention, the light source lamp of each lighting lamp is configured to be moved up and down within the reflector of the lamp by operating the handle, so that the light field formed by the reflector can be wide or narrow. Selection can be made only by operating the handle without moving the entire illumination lamp up and down. Furthermore, there is no need to shift the optical axis of the light field of each reflecting mirror to ensure the necessary width of the light field.

Furthermore, the focus adjustment device starts operating in conjunction with the end of the light field variable operation and automatically adjusts the focus to obtain the maximum illuminance at the required area, so there is no need to adjust the focus visually as in the past. You can easily and accurately adjust the focus without any hassle.

[Brief explanation of drawings]

Figure 1 is a schematic view of the operating room, Figure 2A is a view in which the light field is enlarged by bringing the light source lamp closer to the reflector, and Figure 2B is a view in which the light field is reduced by moving the light source lamp further away. Figures 3 and 5 are partial plan views of the multiple illumination lamp, Figure 4 is a sectional view taken along Y-Y' in Figure 3, and Figure 6 is a sectional view taken along Y-Y' in Figure 5. be. FIG. 7 is a system diagram of the focus adjustment device, and FIG. 8 is a block diagram of the focus adjustment device. FIG. 9 shows a schematic view of the case where the light field is reduced by converging the light flux, and FIG. 10 shows a view of the conventional reflector in which the optical axis is shifted and the light field is enlarged. Figure 11 is an explanatory diagram of the shadowless effect, Figure 12
The figure shows an example of a specific electric circuit diagram of the configuration of the focus adjustment device, FIG. 13 shows an example of a timer circuit diagram that links the variable light field device and the automatic focus adjustment device, and FIG. Turn on and off according to your needs.
FIG. 3 is an explanatory diagram of a switch mechanism having a mechanical contact that turns off. 1...Multi-light lighting, 2...Operating room ceiling, 3...
...Handle, 4...Patient, 5...Principle, 6,7...
...Arm, 8...Arm, 9...Boom, 11...
...Ring-shaped outer frame of a multi-light illumination lamp, 12... Outer cover, A... Skin site, B... Affected area, C... Optical axis focal plane, F, F', F''... Light field, L ₁ , _L2 , _L3 , _L4 ...
...Illumination lamp, S ₁ , S ₂ , S ₃ , S ₄ ... Optical axis, P, Q ...
Luminous flux, R...obstacle, R'...shadow, 14...ring-shaped frame, 15...reflector, 16...rotation axis, 17
... Projection piece, 18 ... Motor, 19 ... Disc, 20
... Link rod, 21 ... Lower end cover, 22 ...
Motor on/off relay, 23... Motor rotation method relay circuit, 24... Start switch,
25...lens, 25a...slit, 26...
Optical sensor, 27... Amplifier, 28... Fall detection circuit, 29... Correction circuit, 51... Transmission screw, 5
2... Rod member, 53... Ring body, 53a... Mounting member, 54... Wire, 55... Buffer spring, 56... Light source lamp, 56a... Light source lamp base, 57... Light source lamp vertical movement. Information department, 61
...Eccentric cam, 62...Switch.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A plurality of illumination lamps each having one light source on the optical axis of one reflecting mirror and condensing the luminous flux emitted from the light source by reflecting it on the reflecting mirror. A rotatable handle and a rotational force of the handle, in which each of the individual reflecting mirrors is tilted by a motor drive in a direction to simultaneously align and condense light to adjust the focus to a predetermined position on the surgically affected area. a light field of the plurality of illumination lights, comprising a transmission means and a light source vertical movement function for moving each light source of the plurality of illumination lights up and down simultaneously in the same direction within each reflecting mirror by the transmission force; a variable device; and an automatic focus adjustment device that is activated by an activation switch and automatically adjusts the focus by detecting a fall in the change in light intensity at the surgically affected area, and the activation switch of the automatic focus adjustment device is configured to operate as described above. A multi-light surgical illumination lamp characterized in that it is configured to be linked to switches that are opened according to the rotation angle of a rotatable handle that changes the light field of a variable light field device. (2) The automatic focus adjustment device includes a lens 25 attached to the housing of the multi-light illumination lamp so as to be able to condense the reflected light beam from the focal point of the surgically affected area, and a slit 25a on the back surface of the lens; Optical sensor 2 for light flux through
6, an on/off relay circuit 22 for a motor that detects a fall in illuminance change in the focal light field of the surgically affected area based on an input signal via the optical sensor, and tilts the individual reflector; a fall detection circuit 28 that sends out a stop signal for the motor; and a fall detection circuit 28 that sends a start signal for the motor for a predetermined time after a set time in response to the fall detection signal from the fall detection circuit to an on/off relay for the motor. Modification circuit 2 with a timer sending to circuit 22
9, motor rotation that changes the rotational direction of the motor in response to a falling signal from the falling detection circuit 28 to an off signal input signal that does not tilt the individual reflector from the on-off relay circuit 22 of the motor; The surgical multiple illumination lamp according to claim 1, characterized in that it comprises a directional relay circuit 23.