JP3424895B2 - Operation switch device for endoscope internal conduit - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation switch device for an endoscope inner conduit, and more particularly, an operation switch device for controlling opening / closing of conduits such as an air / water supply pipe and a suction pipe provided in an endoscope. Concerning the structure of.

[0002]

2. Description of the Related Art An endoscope apparatus has, for example, a CCD (Charge Coupled Device), which is an image pickup device, at its tip, and can image and observe the inside of an object to be observed illuminated through a light guide. It is possible to supply air / water to the observation window or the like of the part, or suck the contents in the observed body. That is, an air supply pipe and a water supply pipe connected to the air supply / water supply means are arranged in the endoscope, and a suction tube connected to the suction means and used also as a treatment instrument insertion channel is arranged. As an operation valve device (mechanical opening / closing valve), an air / water supply valve and a suction valve are provided in an operation unit integrated with the endoscope.

According to the above operation of the air / water feeding valve,
For example, air is supplied by opening the air supply pipe during the pushing operation in the first stage, and water is supplied by closing the water pipe and opening the water pipe during the pushing operation in the second stage. In addition, the pressing operation of the suction valve opens the suction pipe, so that dirt and the like in the body to be observed can be sucked.

[0004]

By the way, in recent years, in the endoscope apparatus, the valve opening / closing function which is performed by the air / water feeding valve or the suction valve as described above is not arranged in the endoscope operation section. Instead, it becomes a separate body from the endoscope as a scope,
For example, it has been proposed to arrange it in a solenoid valve unit. Therefore, instead of the mechanical valve type operation member described above, an electric operation switch is arranged in the endoscope operation section.

However, this electric operation switch device is different from the conventional valve device in the operation feeling, and if it is separated from the conventional operation feeling,
It is inconvenient to operate. In addition,
When used as a water supply operation switch, etc., two operations of pushing one operation body perform different operations of air supply and water supply, so some stroke was given for the second operation. In some cases, careless operation can be prevented and operation is easier.

The present invention has been made in view of the above problems, and an object thereof is to retain a conventional operation feeling to some extent and to facilitate the operation of opening and closing a pipeline even when an electric operation switch is used. An object of the present invention is to provide an operation switch device for a duct in an endoscope.

[0007]

In order to achieve the above object, an operation switch device for an endoscope conduit according to a first aspect of the present invention comprises:
A plurality of switches for giving an operation control signal to an opening / closing valve control unit for opening and closing the pipe line, and a vertically movable unit arranged in the support cylinder for the stroke of the first stage by the push button .
A first piston body that turns on and off one of the plurality of switches by a push operation, and a vertically movable arrangement in the support cylinder, and after the first piston body has stopped, the stroke of the first piston body is larger than the stroke of the first piston body. The second stroke for turning on / off the other one of the plurality of switches by further pressing the stroke for the second long stroke with the same push button .
And a piston body. The invention according to claim 2 is such that the piston body is directly pushed.
Place multiple switches at the bottom of the support tube and
The center of the movable part of the switch is placed at a position displaced from the center of the piston body, and the switch which is the pressed position of this movable part is placed.
The position of the pitch frame and flush, the piston body is in contact
It is characterized in that a stop auxiliary member for stabilizing the stop state is arranged.

According to the above construction, when the push button is lightly pushed, the first piston body is pushed down, and the air feed switch (electrical switch) is turned on at the tip of the first piston body. Then, when the push button is further pushed to move the second piston body by a predetermined stroke, the water feed switch (electrical switch) is turned on at the tip of the second piston body. Since the stroke of the second piston body at this time is set to be longer than the stroke of the first piston body, the operation can be performed as if the conventional on-off valve were operated, and water is not inadvertently executed.

According to the second aspect of the invention, the center of the movable portion of the switch is displaced from the center of the piston body,
For example, by arranging the frame body of the water supply switch as the stop assisting member of the first piston body for the air supply operation, there is an advantage that the two switches can be arranged in a narrow range and the switch device can be made compact. .

[0010]

1 to 3 show an operation switch device for an endoscope internal conduit according to an embodiment, and FIG. 4 shows an overall view of an electronic endoscope device. First, the overall configuration of the endoscope will be described. In FIG. 4, an electronic endoscope 10 as a scope has a tip portion 10A having a CCD, an insertion portion 10B, an operation portion 10C, and a first cable 10D, and a connector 11 of the first cable 10D connects the light source device 12 to the light source device 12. Connected and connected to the processor (image processing) device 14 by the signal cable 13. That is, in the endoscope 10, light is emitted from the tip portion 10A by the light guide provided from the tip portion 10A to the light source device 12, and the signal line arranged from the tip portion 10A to the processor device 14 is provided. The CCD can be controlled and the image signal can be read out via the.

The conduit cable 15 branched from the connector 11 is an electromagnetic valve unit (conduit control unit).
16, the conduit cable 15 and the first
In the cable 10D, the air supply / water supply pipe (in the figure, the water supply pipe 18
Is shown only). This solenoid valve unit 16
Is provided with a solenoid valve that controls the opening and closing of a pump and a pipeline, and is electrically connected to the processor device 14.

Further, the operation section 10C is provided with a conduit unit 20 (composed of a support section 20A and a second cable 20B) which is detachable from the operation unit 10C.
The suction pipe 21 is guided to the solenoid valve unit 16 by 0. That is, a cylindrical receiving portion 23 formed with a male screw is provided on the rear end surface of the operating portion 10C, and the supporting portion 2 is provided.
An operation ring 24 having a female screw formed on the inner circumference is provided on the 0A side, and the pipe ring unit 20 is attached to the operation unit 10C by screwing the operation ring 24 to the receiving portion 23.

Further, in the receiving portion 23, the folded portion 25 in which the above-described air supply pipe and water supply pipe 18 are arranged in an open state.
Is provided, and when the conduit unit 20 is removed, brush cleaning can be performed from the conduit opening of the folded portion 25.

The operation section 10C includes an air / water supply switch section (device) 27 for opening / closing the air supply tube and the water supply tube 18, and a suction switch section 28 for opening / closing the suction tube 21. These switch parts 2 are provided.
The on / off signals of 7, 28 are sent to the control circuit in the solenoid valve unit 16. A photographing button 29 is arranged together with the switch portions 27 and 28, and an angle knob or the like is provided on the back side of the operation portion 10C.

As shown in FIG. 1, the air / water feed switch unit 27 includes a push button 32, a first piston body 33, and a first piston body 33 inside the upper support cylinder 31A and the lower support cylinder 31B as outer casings. The two-piston body 34 is arranged so as to be vertically movable. That is, the second piston body 34 is integrated with the push button 32, and these members are upwardly moved by the spring member 36 arranged between the stopper portion 35 of the second piston body 34 and the ceiling surface of the push button 32. Be energized.

Further, inside the second piston body 34,
The first piston body 33 is attached so as to be movable up and down, and the position of the first piston body 33 is restricted by a portion (stopper structure) of the tip end surface 34D of the second piston body 34, and the first piston body 33 is urged downward by the spring member 37. To be done. These piston bodies 3
On the bottom side of the lower support cylinder 31B below 3,3,
A circular air feed switch 39 and a water feed switch 40, which are electrical switches, are attached at the same height, and the movable portion (push button portion) of the air feed switch 39 is moved by the first piston body 33 to the other water feed. The movable portion of the switch 40 is arranged so as to be pushed by the second piston body 34.

The front end surface 33D of the first piston body 33 is disposed apart from the air feed switch 39 by a slight first step stroke S1 (for example, 0.5 mm), and the front end surface of the second piston body 34 is disposed. 34D is the first piston body 3
The second stage stroke S2 (e.g., 2 to 3.5 mm), which is longer than the stroke S1, is arranged apart from the tip surface 33D of No. 3 of FIG. Therefore, the first stage operation stroke of S1 is set in the first piston body 33, and the second stage operation stroke of S2 after the first piston body 33 is stopped is set in the second piston body 34. Will be set.

Further, the air feeding switch 39 is arranged slightly offset from the center of the tip surface 33D of the first piston body 33, and the frame body 40A of the water feeding switch 40 has the tip surface 3D.
Place it so that it touches 3D. According to this, the frame body 40A of the water supply switch 40 functions as a stop assist member that stabilizes the position and the state when the air supply switch (movable part) 39 is pushed by the first piston body 33. Also,
Also for the second piston body 34, the stop assist member 41 is arranged at the same height as the frame body 40A. The movable portions of the switches 39 and 40 described above are lowered to the position of the frame body (40A) during the ON operation.

Furthermore, the upper support cylinder 31A and the lower support cylinder 31B are connected by a screwing portion 42, and as shown in FIG. 2, the upper support cylinder 31A and the piston body 33 attached thereto. , 34 can be separated from the lower support cylinder 31B. According to this, there is an advantage that the operation switch can be easily repaired. As shown in the figure, the first piston body 33 is provided with a ventilation hole 43 penetrating from the central cavity to the outer periphery in order to smooth the vertical movement.

On the other hand, the suction switch unit 28 is a one-stage switch, and the push button 47 and the piston body 48 are integrally and vertically arranged inside the upper support cylinder 46A and the lower support cylinder 46B connected by the screwing portion 45. It is movably arranged. The push button 47 and the piston body 48 are biased upward by a spring member 50 arranged between the stopper portion 49 of the piston body 48 and the ceiling surface of the push button 47. And the lower support cylinder 4
An electrical switch 51 is provided on the bottom surface of 6B, and a stop assist member 52 is attached. Between this switch 51 and the tip surface 48D of the piston body 48, the stroke of S2 is the same as above. Be separated.

The embodiment has the above-mentioned structure, and the operation of the air / water supply switch unit 27 is as shown in FIG. That is, as shown in FIG. 3 (A), the push button 3
When 2 is lightly pushed by the stroke of S1 (about 0.5 mm), the first piston body 33 turns on the air supply switch 39, and the air supply is controlled by the opening / closing control of the solenoid valve unit 16 in FIG. Is executed. Next, as shown in FIG. 3 (B), when the push button 32 is pushed by the stroke of S2 (2-3.5 mm), the second piston body 34 turns on the water feed switch 40. Water is sent by.

According to such an air / water feeding switch unit 27, the operation for feeding water is executed with the stroke S2 larger than the stroke S1, which is similar to the conventional mechanical valve type operating member. It will be possible to perform air / water supply as if operating. Moreover, since there is a stroke difference between the first stage and the second stage, the water supply operation of the second stage will not be carelessly performed.

When the first piston body 33 pushes the air feed switch 39, the frame body 4 of the water feed switch 40
0A, and when the second piston body 34 pushes the water feed switch 40, it also comes into contact with the stop assist member 41. Therefore, even when the respective switches 39, 40 are arranged so as to be displaced from the centers of the tip surfaces 33D, 34D of the respective piston bodies 33, 34, stable switching operation is performed.

Further, in the case of the suction switch section 28,
When the push button 47 is pressed by the stroke of S2, the tip surface 48D of the piston body 48 turns on the switch 51, and suction is performed by the opening / closing control of the solenoid valve unit 16. Also in this case, the stroke S2 can provide the same operation feeling as that of the valve type operation member.

[0025]

As described above, according to the invention described in claim 1, different predetermined electric switches are provided by the first piston body and the second piston body which move up and down in the support cylinder by the same push button. While pressing, the second piston body is set to have an operation stroke longer than the operation stroke of the first piston body, and the valve opening / closing control section is operated, so that the endoscope operation section is electrically operated. Even when a simple operation switch is used, it is possible to leave the conventional operation feeling to some extent. Further, there is an advantage that the operation of opening and closing the conduit can be easily performed by eliminating the inadvertent operation by the second piston body.

According to the second aspect of the present invention, the center of the movable portion of the switch is displaced from the center of the piston body, and at the same height as the switch frame body at which the movable portion is depressed.
Since the stop assisting member is arranged at the lower position, the two switches can be arranged in a narrow range, and the operation switch device can be made compact.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of an operation switch device for an endoscope internal conduit according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which an upper support cylinder of an air / water supply switch unit which is the operation switch device of FIG. 1 is separated.

3A and 3B show the operation of the air / water supply switch unit in FIG. 1, FIG. 3A being a view during an air supply operation, and FIG. 3B being a view during a water supply operation.

4 is a diagram showing a configuration of an entire endoscope to which the operation switch device of FIG. 1 is applied.

[Explanation of symbols]

10 ... Electronic endoscope, 10C ... Operation part, 16 ...
Solenoid valve unit, 20 ... Pipe line unit, 27
... Air / water supply switch part, 28 ... Suction switch part, 32, 47 ... Push button, 33 ... First piston body, 34 ... Second piston body, 48 ... Piston body, 39, 40, 51 ... Electrical switch, 40A
... Frame body, 41, 52 ... Stop assisting member.

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-8-215140 (JP, A) JP-A-56-139734 (JP, A) JP-A-61-73633 (JP, A) JP-A-2- 57231 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A61B 1/00-1/32

Claims (2)

(57) [Claims] 1. A plurality of switches for giving an operation control signal to an on-off valve control unit for opening and closing a pipe line, and a first stage stroke by a push button which is arranged so as to be vertically movable in a support cylinder. A first piston body for turning on and off one of the plurality of switches by pushing the minute switch, and a stroke of the first piston body, which is arranged in the support cylinder so as to be vertically movable and stops after the first piston body stops. to the same push-button the stroke of the long second stage than
And a second piston body for turning on and off the other one of the plurality of switches by further pushing the switch. 2. The compound body is arranged so that the piston body is directly pushed.
With placing the number of switches on the bottom of the support tube, the movable portion center of the <br/> switch disposed at a position shifted from the center of the piston body, a depression position of the movable portion switches
The position of the switch frame and flush, and the piston body is in contact
The operation switch device for an endoscope internal conduit according to claim 1, further comprising a stop auxiliary member for stabilizing the stop state.