JPH0730001Y2 - Endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an endoscope used for medical purposes, industrial purposes, etc., and in particular, an angle operation mechanism for operating an angle of a distal end portion of an insertion portion thereof is attached. The present invention relates to a mechanism for fixing a mounting substrate for.

[Prior Art] As is well known, an endoscope is formed by connecting an insertion section to be inserted into a body cavity or the like to a main body operation section.
Most of the portion from the side connected to the main body operating portion is a flexible portion that is configured to smoothly bend along the insertion path, and an angle portion and a distal end hard portion are sequentially connected to the tip of the flexible portion, By bending the angle portion, the lighting window,
The distal end hard portion provided with the observation window, the treatment tool outlet, etc. can be directed in a desired direction.

Here, in order to perform a so-called angle operation for bending the angle portion, an angle operation wire is provided, and the angle operation wire is extended to the main body operation portion,
It is wound around a pulley that can be rotated by an angle knob provided on the main body operation unit. Therefore, when operating the endoscope while holding the main body operating portion, the angle operation of the angle portion can be performed by rotating the angle knob.

In order to enable the above-described angle operation, a mounting board is internally provided in the main body operation part, and a pulley, an angle operation wire guide, and the like forming an angle operation mechanism are mounted on the mounting board. Here, since the angle operation wire is subjected to a considerably large tensile force or bending force, the mounting substrate must be fixed in a stable state. Therefore, this mounting board is usually connected and fixed to the casing of the main body operation section, but in recent years, in order to reduce the weight of the endoscope and reduce the manufacturing cost, the main body operation section is attached. Since a casing made of plastic is used, it is not possible to fix the mounting substrate directly to the casing.

Therefore, using a pair of metal plates, the casings are mounted so as to be sandwiched by these metals, and the two are connected and fixed with screws or the like, and the connecting portion is extended to the inner metal plate of the casing among these metal plates. It has been known that the mounting board is connected to the connecting portion by being provided.

[Problems to be solved by the invention] By the way, during the angle operation, since the angle operation wire is pulled, a pulling force always acts on the mounting board, and in addition to this pulling force, bending and force also cause a swinging force. To work. Therefore, as described above, when the connecting portion is extended from the inner metal plate of the casing, the inner metal plate is removed from the casing by the tensile force, the bending force, the twisting force, etc. acting on the mounting substrate. It receives a force in the direction of separating. This force is transmitted to the outer metal plate through the screw connecting the inner metal plate and the outer metal plate, and the outer metal plate is received by being pressed against the casing. become. Therefore, a very large force is applied to the screw, which causes a problem such as deformation and damage of the screw.

The present invention has been made in view of the above points, and an object thereof is to provide a pair of metal plates that sandwich a casing even when a large force acts on a mounting substrate on which an angle operation mechanism is mounted. An object of the present invention is to provide an endoscope having a structure in which an excessive force does not act on a screw that connects the two.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a through hole in a casing of the main body operating part for fixing a mounting substrate of an angle operating mechanism built in the main body operating part. And an inner metal plate and an outer metal plate are provided in contact with the inner and outer surfaces of the casing sandwiching the through hole, and the outer metal plate of the two metal plates extends into the casing through the through hole. A connecting plate part for connecting the connecting plate part to the mounting board, and further, a connecting member is arranged on the main body operating part so as to cover the outer metal plate, and the connecting member and the inner side are provided. The present invention is characterized in that the casing and the outer metal plate are sandwiched between the metal plate and the metal plate and screwed.

[Operation] By adopting such a configuration, the angle operation mechanism is actuated, and a large force acts on the mounting substrate on which the angle operation mechanism is mounted. It will be transmitted to the board. Here, both the front and back surfaces of the outer metal plate to which the force from the mounting substrate directly acts are sandwiched between the casing and the connecting member to the main body operation part, and further, the inner metal plate is provided inside the casing, and the outer metal plate is screwed. Since the plate is held in pressure contact from both sides, no matter which force such as pulling, bending, or twisting acts on this outer metal plate, this force can be transmitted to the screw. There is no possibility that an excessive force acts on the screw to deform it or damage it.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the drawings.

First, FIGS. 1 to 3 show a first embodiment of the present invention, and FIG. 1 shows the entire structure of the endoscope. As is clear from the figure, the endoscope includes a main body operation part 1, an insertion part 2 that is continuously provided to the main body operation part 1 and is inserted into a body cavity or the like, and an LG flexible part through which a light guide is inserted. It is composed of 3 and 3.

The insertion portion 2 is a flexible portion 2a which is bent along the insertion path for the most part from the connection portion to the main body operation portion 1.
An angle portion 2b and a hard tip portion 2c are successively connected to the flexible portion 2a. An illumination window, an observation window, a treatment instrument lead-out portion, etc. are formed in the distal end hard portion 2c, and in order to direct the distal end hard portion 2c in a desired direction, the angle portion 2b is arbitrary as shown by an imaginary line. It is designed to be curved in the direction of.

In order to perform this angle operation, an angle operation wire (see FIGS. 2 and 3) is provided, and the tip end portion of the angle operation wire 4 is provided with an angle ring (not shown) forming the angle portion 2b. It is fixed to the ring or the hard tip portion 2c located at the tip of the two. Here, when the angle portion 2b is configured to be curved only in the vertical direction, a pair of upper and lower angle operation wires is provided, but it is possible to bend the angle portion 2b not only in the vertical direction but also in the horizontal direction. For example, a pair of angle operation wires is provided on the top, bottom, left and right. Then, the other ends of these angle operation wires 4 are made to extend into the main body operation portion 1,
As shown in FIG. 2 and FIG. 3, the pair of upper and lower angle operation wires 4 are connected to the pulley 6a via the guides 5, respectively.
The pair of left and right angle operation wires 4 are wound around the pulley 6b. Therefore, by appropriately rotating these pulleys 6a and 6b, the angle operation wire 4 can be pushed and pulled to bend the angle portion 2b in a desired direction.

In order to rotate the pulleys 6a, 6b, the shafts connected to the pulleys 6a, 6b are led out of the main body operation part 1 and an angle knob 7 is attached. Therefore, when the person who operates the endoscope operates the angle knob 7 with his / her fingers, the pulley 6a or 6b is rotated to push / pull the angle operation wire 4.

Here, the pulleys 6a, 6b and the guide 5 described above are mounted on the mounting substrate 1
It is attached to 0. A pair of metal plates 11 and 12 is used to fix the mounting substrate 10. Both these metal plates 1
One of the metal plates 11 and 12 is an inner metal plate provided inside the casing 1a, and the metal plate 12 is an outer metal plate provided outside the casing 1a. The inner and outer metal plates 11 and 12 are attached to an eyepiece portion for attaching an eyepiece portion 8 serving as a connecting member connected to the plastic casing 1a forming the outer shell of the main body operating portion 1. It is attached so as to sandwich the through hole 13 formed in the portion 8a. Here, as these mounting structures, the metal plate 11, the casing 1a, the metal plate 12, and the eyepiece mounting portion 8a are arranged in this order from the inside, and the screw 14 is inserted through these, and the metal plate 11 is screwed. It is done like this. This allows the outer metal plate 12
The entire surface of both the front and back sides is completely covered with the casing 1a and the eyepiece attachment portion 8a. Then, in the outer metal plate 12, in the casing 1a, a connecting portion 12a that is introduced into the inside of the casing 1a through an opening 15 for leading out the light guide to the eyepiece 8 side is extended. The mounting substrate 10 is connected to the connecting portion 12a by screws 16.

The present embodiment is configured as described above, and when the angle knob 7 provided on the main body operation unit 1 is rotated, the pulleys 6a and 6b connected to the angle knob 7 are appropriately rotated to perform the angle operation. The wire 4 is pushed and pulled, and the angle portion 2b is bent. At this time, the pulling force of the angle operation wire 4 acts on the mounting substrate 10, the mounting substrate 10 is pulled in the direction of the arrow in FIGS. 2 and 3, and bending force, twisting force, etc. act. . Then, such a force acting on the mounting substrate 10 acts on the metal plate 12 having the coupling portion 12a coupled to the mounting substrate 10. Here, since the metal plate 12 is sandwiched between the casing 1a and the eyepiece attachment portion 8a and fixed by the screw 14,
Forces in various directions such as pulling, bending, and twisting transmitted from the mounting substrate 10 to the metal plate 12 at the time of the angle operation are surely received by the sandwiching by the casing 1a and the eyepiece mounting portion 8a. Therefore, there is no possibility that the screw 14 for fixing the metal plate 12 is deformed or damaged due to an excessive force. Next, FIGS. 4 to 7 show a second embodiment of the present invention, in which the same or equivalent members as those in the first embodiment described above are designated by the same reference numerals and their description is omitted. Shall be omitted.

Therefore, in this embodiment, the pair of upper and lower connecting portions 21a and 21b are provided to extend on the metal plate 20 provided on the outside, and the projections 22a and 22b are provided at the tip portions of the respective connecting portions 21a and 21b. The ones shown are shown. Each of these protrusions 22a, 22b is
An inclined portion that is inclined outward from the tip end side, that is, in the upper connecting portion 21a and in the lower connecting portion 21b is formed.

On the other hand, as shown in FIG. 7, the attachment board 23 to which the connecting portions 21a and 21b are connected is folded back inward at both the upper and lower sides of the base end portion thereof so as to be engaged with the engaging portions 24a and 24b.
Are formed, and the connecting portion 21 is formed in the engaging portions 24a and 24b.
a, 21b are inserted, and the projections 22a, 22b are engaged with the edge portions by a snap action action, so that the mounting substrate 23 can be fixed in a state of being connected to the connecting portions 21a, 21b of the metal plate 20. Has become.

With this configuration as well, the pulling force, bending force, twisting force, and the like of the angle operating mechanism that acts on the mounting substrate 23 are transmitted to the metal plate 20 via the connecting portions 21a and 21b, and the metal plate 20 is It is possible to prevent an excessive force from being applied to the screw 14, which is received by the surface that comes into contact with the casing 1a and the eyepiece mounting portion 8a.

Moreover, a metal plate in which the metal plate 20 is provided inside the casing 1a
A screw 15 is tightened between the connecting plate 21 and the metal plate 20, the connecting portions 21a and 21b integrally connected to the metal plate 20 are made to project into the casing 1a, and the connecting substrate 21a and 21b are attached to the mounting substrate 23. By engaging the locking portions 24a, 24b, the attachment board 23 can be connected to the metal plate 20. The mounting board 23
As is well known, the member continuing to this is fixed at the connecting portion between the main body operating portion and the flexible portion, so that the mounting substrate 23 is stable in the state of being engaged with the connecting portions 21a, 21b, and the casing 1a. There will be no inconvenience that the mounting board 23 moves inadvertently.

Further, since the mounting substrate 23 is connected to the connecting portions 21a, 21b of the metal plate 20 by using a snap action action of the connecting portions 21a, 21b without using screws or the like, the attachment and detachment between the two can be performed. It will be extremely easy. Moreover, the connecting portions 21a, 21
Since b is made to extend from the side of the metal plate 20 disposed on the outside, the length of the connecting portions 21a, 21b can be increased, and therefore a snap action action is exerted on the connecting portions 21a, 21b. It can have sufficient elastic force to do.

[Effects of the Invention] As described above, according to the present invention, the outer metal plate having the connecting plate portion to the mounting substrate is sandwiched between the casing and the connecting member connected to the main body operating portion, and the connecting member is connected. Since it is configured to be screwed between the inner metal plate and the inner metal plate, even if forces in various directions such as a pulling force, a bending force, and a twisting force of the angle operating mechanism acting on the mounting substrate are transmitted to the outer metal plate, The outer metal plate is sandwiched between the casing and the connecting member and is securely fixed, so that the screw for fixing the outer metal plate is deformed or damaged. There is no effect.

[Brief description of drawings]

FIGS. 1 to 3 show a first embodiment of the present invention. FIG. 1 is an overall configuration diagram of an endoscope, and FIG. Enlarged view, Figure 3 is of Figure 2
III-III sectional views, FIGS. 4 to 7 show a second embodiment of the present invention, and FIG. 4 is an enlarged view of an essential part showing a part of the main body operating portion, and FIG. 4 is a sectional view taken along line VV of FIG. 4, FIG. 6 is an external view of a metal plate, and FIG. 7 is a sectional view taken along line VII-VII of FIG. 1: Main body operation part, 2: Flexible part, 5: Guide, 6a, 6b: Pulley, 7:
Angle knob, 10, 23: Mounting board, 11, 21, 20: Metal plate, 12
a, 21a, 21b: connecting part, 14: screw, 22a, 22b: protrusion, 23a, 23b:
Locking part.

Claims (2)

[Scope of utility model registration request] 1. A fixing board for an angle operation mechanism built in a main body operating section, wherein a casing of the main body operating section is provided with a through hole, and inside and outside of the casing sandwiching the through hole, respectively. Of the metal plates, the connecting plate part extending to the inside of the casing through the through hole is provided on the outer metal plate, and the connecting plate part is connected to the mounting board. And further, a connection member is disposed on the main body operation portion so as to cover the outer metal plate,
An endoscope characterized in that the casing and the outer metal plate are sandwiched between the connecting member and the inner metal plate and screwed together. 2. The endoscope according to claim 1, wherein the connecting plate portion of the outer metal plate and the mounting substrate are connected by snap action means.