JPH0217006B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a light source device for an endoscope that includes a collimation light and a backup light.

When examining or treating the inside of a body cavity using an endoscope, if the collimation light used for illumination burns out due to its lifespan, the examination or treatment will not be possible until the collimation light is replaced with a new one. must be interrupted. The problem arises that the replacement of the illumination lamp is relatively time consuming, which means that the patient has to endure pain for a long period of time.

To solve this problem, a collimation light and a backup light are attached to a rotatable mounting plate on the light source device, and when the collimation light goes out, the mounting plate can be rotated to install the backup light. By placing it in a predetermined position, we are trying to minimize interruptions in testing and treatment.

Conventionally, it has been known that the above-mentioned rotating operation of the mounting plate is performed manually or electrically using a motor, but since the electric method complicates the configuration and increases costs, the manual method is often used. ing. In the case of a manual type, by rotating a lever through a predetermined angle, the mounting plate is rotated accordingly. However, when the collimation light burns out and the mounting plate must be rotated, the angle at which the lever is rotated may vary depending on the operator, or the lever may be operated in a hurry. Even with this, the lever may not be rotated by a predetermined angle. If this happens, the backup light will not be in the designated position, and a sufficient amount of illumination light will not be sent to the endoscope, or the rotation of the mounting plate will activate the switch to connect the power circuit from the collimation light to the backup light. When the switch is switched to , the above-mentioned switch does not operate, so the standby light does not turn on.

In order to solve this problem, it was proposed to use pins of equal diameter to transmit force between the operating lever and the lamp mounting plate (Utility Application No. 174631/1983). However, even with this method, it was necessary to rotate the operating lever a large amount in order to reliably rotate the operating lever. Moreover, if a large amount of rotation is required, it is likely that the pin will stop midway due to resistance due to friction between the pin and the pin on the mounting plate that receives it. In addition, since the operating lever is rotated by a large amount, a large amount of rotation space is required for the operating lever.

The present invention was made based on the above circumstances, and
The purpose is to provide a light source device for an endoscope that can reliably rotate a mounting plate to a predetermined angle with a small operating angle of a lever and can be configured compactly.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In the figure, 1 is the main body of the light source device. Inside the main body 1, a support 3, which is a plate material bent into a substantially L-shape, is provided with one side fixed to the bottom of the main body 1. A support shaft 4 is rotatably provided on the other vertical side 3a of the support body 3 by a bearing 5, and a substantially sector-shaped mounting plate 6 is connected and fixed to the support shaft 4. A first mounting hole 7 and a second mounting hole 8 are bored in the mounting plate 6 on the same radius from the support shaft 4 at a predetermined angle in the circumferential direction. A collimation light 9 is attached to the first attachment hole 7, and a backup light 10 is attached to the second attachment hole 8. These constitute a switching mechanism that positions the selected collimation lamp 9 or standby lamp 10 at the use position by rotating the mounting plate 6 at a predetermined angle. This switching mechanism is operated by operating means to be described later. In addition, the collimation light 9 and the backup light 10 are elastically engaged with the bottom portions protruding from the respective mounting holes 7 and 8 toward the support body 3 and the engaging portions 11 formed on the mounting plate 6. It is held by substantially U-shaped elastic wires 12, 12. Therefore, by elastically deforming the elastic wires 12, 12 and removing them from the mounting plate 6, the collimation lamp 9 and the backup lamp 10 can be pulled out to the support body 3 side.

A bulge 13 having a substantially inverted U-shaped cross section is formed on one side 3b of the support 3, and a bearing 14 is provided upright on the bulge 13. This bearing 14 is provided with a rotating shaft 15 . An arm 16 is provided at the upper end of the rotating shaft 15 with one end connected and fixed, and a lever 17 is provided at the lower end with one end connected and fixed. When the lever 17 is rotated, the arm 16 is also rotated integrally. The other end of the arm 16 is located near one side 3b of the support 3, and the rotation shaft 15 is attached to this end.
An operating shaft 18 is erected with its axis parallel to the . The other end of the lever 17 is bent into a crank shape and has a through hole 19 formed at the bottom of the main body 1.
It is led out from the main body 1, and a knob 20 is provided at the extending end. Also, lever 1
A protrusion 17a for preventing abutment is protruded from the lower surface of the support member 3 in the middle thereof, and is arranged to be close to or in sliding contact with the upper surface of the other side portion 3b of the support member 3 to eliminate looseness between the support member 3 and the other side portion 3a. It's summery.

On the other hand, as shown in FIG. 2, an arc-shaped insertion hole 21 centered on the support shaft 4 is bored in the other side 3a of the support body 3, and the insertion hole 21 has an arc-shaped insertion hole 21 for the mounting plate 6. A pair of pins 22a, 22 erected on one end surface
b penetrates and protrudes toward the actuating shaft 18 side. These pins 22a and 22b are located on the same radius from the support shaft 4 and are spaced apart at a predetermined interval in the circumferential direction,
The operating shaft 18 is located between these pins 22a and 22b.
is located. These constitute operating means for rotating the mounting plate 6 of the switching mechanism. Therefore, when the arm 16 is rotated via the lever 17 and the rotating shaft 15, the actuating shaft 18 provided on the arm 16 is rotated by the pair of pins 22a, 22.
By pressing either of b, the mounting plate 6 can be rotated about the support shaft 4. Note that 21a and 22b are damping stoppers.

Further, the pressing portion 18a consisting of the tip of the operating shaft 18 is formed in a tapered shape with a larger diameter on the rotation center side of the mounting plate 6, that is, on the tip side. Then, from the equal diameter portion 18b of the operating shaft 18 to the pressing portion 1
The pins 22a, 2 are attached using the portion extending over 8a.
2b is pressed.

On the other hand, as shown in FIG. 1, the mounting plate 6 is provided with a link 23 rotatably connected at one end to a sector-shaped main part thereof. A guide hole 24 is bored in the middle of the link 23 along its longitudinal direction, and a guide pin 25 erected from one side of the support 3 is engaged with the guide hole 24 . Further, one end of a spring 26 is connected to the other end of the link 23. The other end of this spring 26 is located radially outward from the support shaft 4 of the mounting plate 6, and is located between the support shaft 4 and the link 2.
It is connected to a locking shaft 27 that is erected on the mounting plate 6 on a straight line connecting the pivot point of one end of 3. Therefore, the mounting plate 6 is urged in a predetermined rotational direction by the spring 26 due to the angle formed between the link 23 and the spring 26. In other words, when the spring 26 shifts downward from the state where the link 23 and the spring 26 are on the same straight line as shown in FIG. 1, the mounting plate 6 is biased in the direction of the arrow a by the spring 26. , conversely spring 2
6 is displaced above the link 23, it is biased in the direction opposite to the direction of arrow a.

Further, a first micro switch 28 and a second micro switch 29 are provided on the other side of the support body 3, and a first micro switch 28 and a second micro switch 29 are provided on both sides of the mounting plate 6.
An actuation piece 30 and a second actuation piece 31 are provided. When the mounting plate 6 is in the rotational position shown in FIG. 1, the first operating piece 30 operates the first micro switch 28, thereby lighting up the collimation lamp 9. The illumination light output from the collimation lamp 9 is focused by a lens (not shown) and is made to enter a light guide (both not shown) of an endoscope connected to the main body 1. Further, when the mounting plate 6 is rotated as shown by the chain line in FIG. 29
is activated, thereby lighting up the backup light 10.

The electric cords 41 and 42 of the collimation light 9 and the backup light 10 are connected to the mounting plate 6 as shown in FIG.
After being once gathered together by a cord band 43 at the center of rotation, they are guided to a power source (not shown).

According to the light source device having such a configuration, when the collimation light 9 goes out while using the endoscope, the backup light 10 is turned off.
When switching to , the mounting plate 6 may be rotated by operating the lever 17 . At this time, even if the amount of rotation of the lever 17 is insufficient due to various reasons, if the mounting plate 6 is rotated by a certain angle depending on the positional relationship between the link 23 and the spring 26, then is biased in the direction of rotation by the spring 26. That is, even if the mounting plate 6 is not rotated by the entire predetermined angle by the lever 17, the mounting plate 6 is automatically rotated by the entire predetermined angle in the rotation direction by the biasing force of the spring 26. Become.
Therefore, even if the lever 17 is not operated reliably, the mounting plate 6 remains in a position where the second operating piece 31 operates the second micro switch 29.
In other words, a pair of pins 22 erected on the mounting plate 6
A and 22b, one of which is rotated until it comes into contact with one end of the insertion hole 21 formed on one side of the support 3, and the backup light 10 is placed in the same position as the collimation light 9 was before switching. positioned in the state. Therefore, the backup light 10 is reliably turned on, and moreover, the illumination light output from the backup light 10 is sent to the endoscope in a sufficient amount without wasting it.

Also, when switching from the backup light 10 to the collimation light 9 after replacing the burnt out collimation light 9 with a new one, the mounting plate 6 must be rotated to some extent in the opposite direction using the lever 17. For example, since the mounting plate 6 is biased by the spring 26 in the direction of rotation, even if the operation of the lever 17 is uncertain, it can be rotated until the other pin 22a hits the other end of the insertion hole 21. The collation light 9 can be reliably positioned at a predetermined position.

By the way, since the pressing portion 18a of the actuating shaft 18 is formed in a tapered shape with a larger diameter on the tip side, when the lever 17 is rotated, the pins 22a, 22b
The state shown in FIG. 5 changes to the state shown in FIG. 6 while sequentially sliding and pressing from the small diameter side toward the large diameter side. Therefore, the amount of movement of the actuating shaft 18 (the operating angle of the lever 17) is smaller than in the case of the previous method shown in FIGS. 7 and 8, in which the actuating shaft 18 has the same diameter over its entire length.
Even if the angle of movement of the mounting plate 6 remains the same, the angle of movement of the mounting plate 6 increases as shown in FIG. In other words, a slight lever 1
The mounting plate 6 can be rotated significantly with an operating angle of 7. In addition, the operating shaft 18 and pins 22a, 22b
It also slides better, so you don't have to stop midway and get confused when you think the operation is complete.

As explained above, in the present invention, the pressing part of the operating shaft that presses against the receiving pin on the mounting plate side is formed into a tapered shape, so that the mounting plate can be reliably rotated to a predetermined angle by simply rotating the operating lever slightly. can be moved. Moreover, the rotation range can be narrowed and the structure can be made compact.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which FIG. 1 is a front view of a mounting plate provided in a light source device, FIG. 2 is a rear view, FIG. 3 is a plan view along the line of FIG. 2, and FIG. 4 is a sectional view taken along the line of FIG. 2, FIGS. 5 and 6 are explanatory diagrams showing the operating states of the operating shafts, and FIGS. 7 and 8 show the operating states of the operating shafts of the preceding method. The explanatory diagram, FIG. 9, is a diagram showing the relationship between the operating angle of the lever and the moving angle of the lamp mounting plate in the above-described present invention and the above-mentioned prior system. 6...Mounting plate, 9...Collar examination light, 10...Spare light, 17...Lever, 18...Operating shaft, 18a...
...Press action part, 26...Spring.

Claims (1)

[Claims] 1 A rotatable lamp mounting plate is provided with a collimation light and a backup light, and the lamp has a switching mechanism that selectively positions the collimation light or the backup light in the use position by rotating the mounting plate. In the light source device for an endoscope, each end is connected and stretched between the lamp mounting plate side and the bracket supporting it, and when the mounting plate is rotated, the mounting plate is attached in the direction of rotation. A spring that biases the mounting plate, a receiving pin protruding from the mounting plate, and an operating shaft having a tapered operating portion that presses against the receiving pin when rotating the mounting plate. and a switching lever, and when the operating lever is rotated, the tapered operating portion presses the receiving pin, thereby rotating the lamp mounting plate. A light source device for an endoscope, characterized in that: