JPS6120567Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of an endoscope accessory connecting device that connects accessories such as a photographing device and a viewing mirror to an eyepiece portion of an endoscope.

Conventionally, devices for connecting accessories such as photographing devices and viewing mirrors to the eyepiece of endoscopes include the so-called bayonet type, and the device that connects accessories such as photographing devices and viewing glasses to the eyepiece of an endoscope, and the device that connects accessories such as photographing devices and viewing glasses to the eyepiece of an endoscope. There is a method of matching. However, in the former method, once fixed, the relationship between the endoscope and the accessories becomes one, and for example, mutual rotation of the endoscope and imaging device is impossible, making it difficult to locate the observation site inside the body. When the endoscope is rotated, the imaging device also rotates, making it difficult to use. Moreover, when a viewing mirror is attached, there is an inconvenience that the image bundle of the viewing mirror may be twisted due to rotation.

On the other hand, in the latter method, it is possible to rotate an accessory, such as an imaging device, with respect to the endoscope in the connected state. However, when an imaging device is connected to an endoscope inserted into a body cavity, if you try to rotate the endoscope while holding only the imaging device in your hand to find the area to be imaged, the endoscope will not move. The body cavity scope cannot be rotated due to friction;
Sometimes only the photographing device rotates. In order to avoid this, it was necessary to hold the imaging device with one hand and the endoscope with the other hand, and rotate the two together. Such operations make an otherwise complicated endoscopic imaging apparatus even more complicated.

This invention was made with attention to the above circumstances,
The purpose of this is to connect accessories such as a photographing device and a viewing mirror to the endoscope, as well as to allow both of the above to rotate freely and to be fixed at any rotational position. The purpose of this company is to provide a product connection device.

Hereinafter, embodiments of the present invention will be described based on the drawings.

Reference numeral 1 in FIG. 1 is a connecting member main body to which a camera (not shown) is attached, and at the end opposite to the side to which the camera is attached, there is an insertion opening for housing and positioning the eyepiece 3 of the endoscope 2. 4 is formed. The insertion opening 4 is formed to have a diameter that matches the outer diameter of the eyepiece 3. In other words, the part corresponding to the final insertion position of the eyepiece 3 should be placed in close contact with the eyepiece 3.
The entrance side matches the outer diameter of the eyepiece 3.
It widens in a tapered shape to make it easier to insert. Further, in the opening 4, corresponding to the final insertion position, there is a projecting edge 5 with which the peripheral end of the eyepiece 3 comes into contact.
is provided. Thus, the eyepiece 3 is fixedly positioned within the insertion opening 4.

Furthermore, a plurality of engagement pieces 7 are attached to the connecting portion main body 1 as engagement members for protruding and retracting the engagement tip 6 into the insertion opening 4. Each engagement piece 7...
are pivoted so as to rotate along the direction of the optical axis l, and each of the engaging pieces 7... is rotated as shown in FIG. 1 by a biasing body 8 such as a torsion coil spring. is biased to rotate counterclockwise.

Each of the engaging pieces 7 is urged to rotate by the urging body 8, so that the engaging tip 6 normally projects into the insertion opening 4. It's summery. Further, the engagement tip 6 comes into contact with and engages with the back surface 9 of the eyepiece 3 inserted into the insertion opening 4, thereby preventing the eyepiece 3 from slipping out.

The engagement tip 6 is formed to engage with the shape of the back surface 9 of the eyepiece 3. Eyepiece part 3
If the back surface 9 of the is conical, for example, the first
As shown in the figure, it is formed as a circular arc eccentric to the center of rotation.

That is, once the engagement tip 6 of the engagement piece 7 comes into contact with the back surface 9 of the eyepiece 3, even if an attempt is made to pull the eyepiece 3, the engagement becomes stronger and the engagement piece 7 rotates. Therefore, even if you try to remove it, it will not come off.

The force relationship at this time is as shown in FIG.

That is, since the arc center O ₁ of the engagement tip 6 is separated by a distance l from the rotation center O ₂ of the engagement piece 7, if you try to pull out the eyepiece 3, at the contact point P, A force F toward the arc center _O1 is generated. This force F can be divided into a component force F _M along the slope and a component force F _O directed toward the center of rotation O ₂ . Here, the component force F _O is not involved in the rotation of the engagement piece 7, and only the component force F _M is involved. However, this component force F _M is
Although this is a force that attempts to rotate the engaging piece 7 in the counterclockwise direction, it is generated when attempting to pull out the eyepiece 3, and is not a force sufficient to rotate the engaging piece 7. In this way, the engaging piece 7 allows the eyepiece 3 to
It remains engaged.

On the other hand, a sliding chamber 10 arranged in an annular shape centered on the optical axis l is provided in the connecting body 1, and a release ring that moves in the direction of the optical axis l is provided in the sliding chamber 10. 11 are installed. Note that a pin 12 is provided protruding from the inner surface of the release ring 11. This pin 12 is fitted into a guide groove 13 provided along the optical axis direction in the connecting portion main body 1, so that the release ring 11 is guided only in the direction of the optical axis l.

Further, the release ring 11 is connected to the connecting portion main body 1
An operating body, for example, an operating ring 14 provided on the outer surface of the
It has come to be operated by.

That is, the operating ring 14 is attached so as to rotate at a fixed position around the optical axis l. A pin 16 is provided on the inner surface of the operating ring 14 and is inserted into and engaged with a cam 15 formed of a helicoid groove provided on the outer periphery of the helicoid 11 provided on the outer periphery of the release ring 11. When rotated, the release ring 11 can be moved along the optical axis direction. Further, the operation ring 14 is urged by a tension spring 17 to rotate in one direction, that is, in the direction of rotation in which the release ring 11 is operated so as to be retracted toward the camera.

By rotating the operation ring 14 against the biasing force, the release ring 11 is moved toward the engagement piece 7, and the other end 18 of the engagement piece 7 is pushed and rotated, causing the mating tip to rotate. 6 can be retracted from the insertion opening portion 4.

Therefore, when attaching the eyepiece section 3 to the connecting section main body 1 in the above configuration, it is sufficient to simply insert the eyepiece section 3 of the endoscope 2 into the insertion opening section 4. That is, in this case, when the eyepiece part 3 is guided deep inside the insertion opening 4, the engaging tip 6 of the engaging piece 7 is pushed in and the engaging piece 7 is rotated. The engagement tip 6 is retracted. Then, when the eyepiece part 3 stops against the protruding edge part 5, the engaging piece 7 comes off and protrudes into the insertion opening 4 again, and the first
As shown in the figure, the engagement tip 6 contacts and engages the back surface of the eyepiece 3. As a result, the eyepiece 3 does not come off naturally as described above, but is fixed in a fixed position.

On the other hand, when removing the eyepiece section 3 of the endoscope 2 from the above-mentioned attached state, the operation ring 14 of the connecting section main body 1 or the operation lever 19 attached to the outer periphery of the operation ring 14 is pulled out of the tension spring 17. All you have to do is turn it against the biasing force and pull out the eyepiece part 3 from its insertion opening part 4. That is, the operation ring 14 is turned to move the release ring 11 toward the engagement pieces 7 . Then, the release ring 11 pushes the base end portions 18 of the engaging pieces 7 against the urging force,
Forcibly rotate the engagement piece 7... and the engagement tip 6
is retracted from the insertion opening portion 4, so the eyepiece portion 3 can be removed by simply pulling it.

Note that the shape of the engagement tip 6 of the engagement piece 7 may be as shown in FIG. 5. That is, the center of the arc
The positions of O ₁ and the center of rotation O ₂ may be reversed. At this time, the relationship of forces becomes as shown in FIG.

However, in this case, the rotation radius r is the circular arc radius h
Because of the larger size, it is no longer possible to press the center of the back surface 9 of the eyepiece 3, and the edge of the back surface must be pressed.

On the other hand, as shown in FIG. 2, a rod-shaped fixture 21 is attached to the connecting part main body 1 so as to face the outer circumferential surface 20 of the eyepiece part 3 and protrude into the insertion opening 4. . That is, the fixture 21 penetrates through the thickness of the projecting edge 5 in the radial direction, and its penetrating end 22 engages with the outer circumferential surface 20 of the eyepiece 3. Further, the outer circumferential surface 20 of the eyepiece portion 3 is formed with a knurled groove 23 as shown in FIG. 3, and the penetrating tip 22 is selectively inserted and locked into the knurled groove 23. .

Further, the outer end 24 of the fixture 21 is connected to the sliding chamber 10.
A collar 25 is formed at the tip of the connecting portion main body 1, and a compression spring 26 is wound around the outer end 24 in the sliding chamber 10. has been done. Thus, the fixture 21 is biased inwardly by its compression spring 26.

A control member 27 is provided on the outer wall of the connecting member main body 1, as shown in FIG. 3, for operating and releasing the fixing member 21. That is,
The control member 27 is attached by a guide frame 28 so as to be able to reciprocate in the circumferential direction of the connecting portion main body 1 . Furthermore, on the inner surface of the control member 27,
The cam surface 29 is formed so that the clearance with respect to the fixture 21 is different at both ends of the movement.
In other words, when the control member 27 is moved in the direction A in FIG.
When the eyepiece 1 attempts to rotate, it comes off the knurled groove 23 of the eyepiece 3 and can be retracted upward.
Furthermore, when the control member 27 is moved in the direction B in FIG. 3, the clearance becomes smaller and the fixture 2
1 can be pushed in to engage the tip 22 with the knurled groove 23. Therefore, the control member 27
By moving the fixing member 21, the fixing member 21 can be activated or released. In order to secure the positions of both ends of the control member 27, engagement balls 30 are provided on the inner surface of the control member 27, and engagement grooves 3 are provided on the outer wall of the connecting body 1.
1 and 32, and the engagement ball 29 is adapted to engage with one of the engagement grooves 31 and 32, respectively, at each position.

By operating the fixing device 21 and the control member 27, the connecting part body 1 is connected to the eyepiece part 3 of the endoscope 2 and can be mutually rotated or fixed at each rotational position. Is possible.
That is, when the control member 27 is moved in the direction A in FIG. 3, the fixture 21 is retracted from the knurled groove 23 in accordance with the rotation of the eyepiece 3. Therefore, the eyepiece 3 can freely rotate relative to the connecting body 1. Furthermore, when the control member 27 is moved in the direction B in FIG. Knurled groove 2
3. Since it is maintained in this state, the eyepiece section 3 is fixed and integrated with the connecting section main body 1. Therefore, the endoscope 2 and the connecting portion main body 1 can be rotated together.

According to the above configuration, both can be rotatably connected at all times, and
If necessary, it can be fixed in a rotational position.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and the tip of the fixture may be configured as shown in FIG. 6 or FIG. 7, for example.

That is, in the device shown in FIG. 6, an elastic member 33 made of rubber or the like is attached to the tip of the fixture 21, and the elastic member 33 is pressed against the outer circumferential surface 20 of the eyepiece 3 and fixed by frictional force. This is what I did.
This embodiment is suitable for cases where the outer circumferential surface 20 of the eyepiece portion 3 is smooth and has no special processing such as grooves.

Furthermore, in the case shown in FIG. 7, a V-groove 34 is carved on the outer periphery of the eyepiece 3 in order to increase the frictional force, and the tip 35 of the fixture 21 is formed into a conical shape that fits the V-groove 34. This is what I did.

As explained above, according to the endoscope accessory connection device of the present invention, the accessory and the endoscope can always be connected in a rotatable state, and when it is necessary to fix both can fix both at any rotational position. Therefore,
The operability when using the endoscope with accessories attached can be greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a connecting portion showing an embodiment of the present invention, FIG. 2 is a side sectional view of a different side of the connecting portion, FIG. 3 is a front sectional view of the connecting portion, and FIG. The figure also shows the force line diagram of the locking member, No. 5
The figure is a force line diagram showing another engagement state, and FIG. 6 is a front sectional view of a connecting part showing another embodiment of the present invention.
FIG. 7 is a perspective view showing yet another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Connection main body, 2... Endoscope, 3... Eyepiece, 4... Insertion opening, 6... Engagement tip, 7...
...Engaging member, 11...Release ring, 14...Operation ring, 21...Fixing tool, 23...Knurled groove, 27...Control member, 29...Cam surface, 33...
...Elastic member, 34...V groove.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An endoscope accessory connecting device for connecting an accessory to the eyepiece of an endoscope, which is provided on the accessory side and connects the eyepiece of the endoscope. a receiving opening, a removable engaging member installed within the opening for fixing the eyepiece to prevent it from being removed, an operating body for engaging and disengaging the engaging member, and an operating body installed within the opening for engaging and disengaging the engaging member; 1. An endoscope accessory connecting device comprising: a releasable fixture that prevents rotation of the eye; and a control member that operates the fixture and performs a release operation. (2) Registration of a utility model characterized in that the fixing device is provided in an opening so as to be freely protrusive and retractable, and is configured to be locked in a knurled groove formed on the circumferential surface of the eyepiece part of the endoscope. An endoscope accessory connection device according to claim 1. (3) The fixture is provided so as to be freely protrusive and retractable into the opening, and is provided with a friction body at its tip so that the friction body can be pressed against the circumferential surface of the eyepiece. An endoscope accessory connection device according to claim 1 of the utility model registration claim.