JPS6356523B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an endoscope accessory connecting device for connecting an accessory such as a photographing device or 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 accessories becomes one, for example,
The endoscope and the photographing device cannot be mutually rotated, and when the endoscope is rotated to search for an observation site within a body cavity, the photographing device also rotates at the same time, 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, accessories such as the imaging device can be rotated relative to the endoscope while connected, but when the imaging device is connected to an endoscope inserted into a body cavity, or vice versa, the endoscope A large amount of force is required when connecting the imaging device with the device inserted into the body cavity. If it becomes necessary to take a photograph while observing the inside of a body cavity, the photographing device must be attached and removed while the endoscope remains inserted into the body cavity. Therefore, applying external force to the endoscope during attachment and detachment must be avoided from the standpoint of invasiveness to the patient.

This invention has been made in consideration of the above-mentioned circumstances, and its purpose is to connect one end of the locking piece rotatably provided on the side of the connecting part body using a biasing body such as a torsion coil spring. By protruding into the insertion opening of the main body and locking it to the back of the endoscope eyepiece, accessories and the endoscope are connected, and the optical axis is supported between the main body and the top cover of the main body. By rotating a rotatably provided cam ring at the center of the eyepiece, pressing the other end of the locking piece, and retracting the locking piece from the insertion opening, the locking piece and the eyepiece are removed. It is an object of the present invention to provide an endoscope accessory connecting device which allows the accessory to be removed by releasing the lock from the back surface, and which facilitates attachment and detachment.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.
This will be explained with reference to the figures.

In Fig. 1, reference numeral 1 denotes a cylindrical connection body to which an accessory such as a camera (not shown) is attached.
An insertion opening 4 consisting of a round hole is formed to accommodate and position the. The inner surface of this insertion opening 4 extends inward in a tapered shape, and the diameter at the extending end is the same as that of the eyepiece 3.
It is formed to have the same size as the outer diameter of. An end surface 3 of the eyepiece portion 3 is provided within the opening 4 corresponding to the extending end.
A protruding edge portion 5 is provided that abuts. Thus, the eyepiece 3 can be fixedly positioned within the insertion opening 4. Further, a circular groove 6 is formed in the distal end surface of the main body 1 on the endoscope 2 side, and a plurality of slots 8 are formed in the inner wall 7 in the longitudinal direction. This slot 8 is provided with a plurality of locking pieces 10 rotatably supported by a pivot 9. This locking piece 10 is attached to the pivot 9
It is always biased clockwise by a biasing body 11 made of a torsion coil spring or the like attached to the base plate. Therefore, when the endoscope 2 is not attached, the locking piece 10 is located at a position further rotated clockwise than shown in FIG.
On the other hand, a top cover 12 is provided at the tip of the circular groove 6, and a cam ring 13 is supported between the top cover 12 and the main body 1, facing the other end 10a of the locking piece 10. , is guided by the upper cover 12 and the upper part of the main body 1, and rotates on the inner wall 7 about the optical axis l. In order to rotate this cam ring 13 in the circumferential direction, a groove (not shown) is provided in the outer surface of the main body 1 and the upper lid 12 in the circumferential direction, and the cam ring operating part 14 protrudes from this groove. There is. Further, as shown in FIG. 2, the cam ring 1
3 is provided with a through hole 15 that fits into the inner wall 7, and cam surfaces 16, 16 are formed so as to press the other end 10a of the locking piece 10 and rotate it counterclockwise. It's summery. Further, one end of tension springs 17, 17 is fixed to the cam ring 13 at a position close to the through hole 15. The other ends of the springs 17, 17 are fixed to the main body 1, and the cam ring 13 is always biased counterclockwise. Further, the amount of rotation of the cam ring 13 is suppressed by two stoppers (not shown) provided on the side of the main body 1 spaced apart from each other in the left and right directions, and the amount of rotation in the clockwise direction is limited as shown in FIGS. 4, the other end 10a of the locking piece 10 is the other end 10a.
is pressed by the cam surfaces 16, 16 and rotates counterclockwise until it is completely retracted from the insertion opening 4, and a stopper is provided at this position. Further, the amount of rotation in the counterclockwise direction is determined by the amount of rotation of the other end 10 of the locking piece 10 as shown in FIGS. 1 and 2.
a and the highest position of the cam surfaces 16, 16 face each other, and the distance between the other end 10a of the locking piece 10 and the cam surfaces 16, 16 is limited to a maximum, and a stopper is provided at this position. There is. Therefore, in the normal state, the cam ring 13 is always urged counterclockwise by the springs 17, 17 as described above, so that the cam surfaces 16, 1 of the cam ring 13
6 and the other end 10a of the locking piece 10 are spaced apart from each other as shown in FIGS. 1 and 2.

In this invention configured as described above, in order to connect the endoscope 2 and accessories, the eyepiece 3 of the endoscope 2 is inserted into the insertion opening 4 of the main body 1. Since the end face 3a pushes up the locking piece 10 protruding into the insertion opening 4 against the urging force of the urging body 11, the locking piece 10 retreats from the insertion opening 4 and the eyepiece The end surface 3a of 3 is in contact with the end surface of the projecting edge 5 to be positioned. At this stage, the locking piece 10 is rotated clockwise by the biasing force of the biasing body 11 and comes into contact with the back surface 3b of the eyepiece 3, and the endoscope 2 and the accessory are connected. Note that when this endoscope 2 is attached to the main body 1, the cam ring 13 does not rotate, but is urged by the springs 17, 17, and the cam surfaces 16, 16 and the other end 1 of the locking piece 10
Since the locking piece 10 is separated from the cam ring 1
3 does not prevent its rotation.

Next, in order to disconnect the endoscope 2 and the accessories, in the state shown in FIG.
3 by operating the cam ring operating section 14 to release the spring 1.
When the cam surfaces 16, 16 are rotated clockwise against the elastic force of the locking pieces 10, the other end 10a of the locking piece 10
The locking piece 10 gradually comes close to the cam surfaces 16, 16, and eventually comes into contact with each other. When the locking piece 10 is further rotated clockwise, the other end 10a is pressed by the cam surfaces 16, 16, as shown in FIGS. 3 and 4. It rotates counterclockwise against the biasing force of the biasing body 11 and retreats from the insertion opening 4 as shown in FIG. At this stage, the cam ring 13 is prevented from rotating clockwise by a stopper (not shown), and the endoscope 2 and accessories can be separated from each other.

Next, FIGS. 5 and 6, in which the same parts in FIGS. 1 to 4 are denoted by the same reference numerals, show a second embodiment of the present invention. In the figure, reference numeral 18 denotes a roller, and this roller 18 has a groove 19 formed in a direction perpendicular to the optical axis l of the main body 1 and toward the center, and a groove 19 formed in the upper cover 12 in a direction perpendicular to the optical axis l. Further, both ends thereof are fitted into a groove 20 formed toward the center, and are slidably provided within the grooves 19 and 20. Since the other configurations are the same as those in FIGS. 1 to 4, their explanation will be omitted.

Next, attachment and detachment of the endoscope in this second embodiment will be explained. Since the installation is the same as in the first embodiment, the explanation thereof will be omitted.

For removal, see cam ring 1 in Figure 6.
3 rotates clockwise from this state against the elasticity of the spring 17 (not shown), the locking piece 10
are pressed against the cam surfaces 16, 16, and the grooves 19 and 2
0, the roller 18 slides toward the center of the optical axis l. In this way, the other end 10a of the locking piece 10 is pressed to the center of the optical axis by the roller 18,
The locking piece 10 rotates counterclockwise against the biasing force of the biasing body 11. When the locking piece 10 is rotated from the insertion opening 4, the endoscope 2 can be removed.

As in the second embodiment, the other end 10 of the locking piece 10
Since the rollers are provided between a and the cam surfaces 16, 16 of the cam ring 13, friction is reduced and the cam ring 13 can be easily rotated, making removal even easier.

Next, FIGS. 7 and 8, in which the same parts in FIGS. 1 to 4 are denoted by the same reference numerals, show a third embodiment of the present invention. In the figure, reference numeral 21 denotes a roller, and this roller 21 is rotatably provided on a rotating shaft 22 attached to the locking piece 10. The other configurations and operations are the same as those in the first embodiment, so their explanation will be omitted.

As in the third embodiment, the locking piece 10 and the cam ring 1
Since the roller 21 is rotatably provided between the cam ring 13 and the cam ring 3, the cam ring 13 can be rotated more easily, and the endoscope 2 can be attached and detached more easily.

Next, FIGS. 9 to 11, in which the same parts in FIGS. 1 to 4 are denoted by the same reference numerals, show a fourth embodiment of the present invention. In the figure, a cam ring 23 is fitted on the outer surface of the main body 1 so as to be rotatable and prevented from sliding in the longitudinal direction. Cam surfaces 24, 24 are formed on the end surface of the cam ring 23 on the endoscope side.
4, the locking piece 10 is rotated by pressing in the longitudinal direction. The other configurations are the same as in the first embodiment, and will therefore be omitted.

Next, in the fourth embodiment, the mounting of the endoscope 2 is exactly the same as in the first embodiment, so a description thereof will be omitted. When removing, if the cam ring 23 is rotated counterclockwise when viewed from the side of the endoscope 2 in the figure, the cam surfaces 24, 24 will move the locking pieces 10 against the urging force of the urging member 11. By rotating counterclockwise, the locking piece 10 is retracted from the insertion opening 4, so the endoscope 2 can be removed.

By configuring as described above, the same effects as in the first embodiment can be obtained.

As explained above, the endoscope is fixed to the main body by the locking piece that protrudes and retracts into the insertion opening formed in the connection body, and when the locking piece is retracted from the insertion opening, the cam Since we decided to operate the ring by rotating it around the optical axis,
It is possible to provide a safe endoscope accessory connection device that facilitates attachment and detachment of the endoscope, improves operability, and does not cause any invasion to the subject.

[Brief explanation of drawings]

1 to 4 show a first embodiment of the present invention, FIG. 1 is a sectional view of the endoscope and the main body connected, and FIG. 2 is a sectional view taken along the line - in FIG. 1. , FIG. 3 is a cross-sectional view of the locking piece retracted from the insertion opening by rotating the cam ring, FIG. 4 is a cross-sectional view taken along the line - in FIG. 3, and FIGS.
The figures also show this second embodiment; FIG. 5 is a sectional view of the tip of the main body, FIG. 6 is a sectional view taken along the line - in FIG. 5, and FIGS. FIG. 7 is a side view showing the positional relationship between the cam ring and the locking piece, FIG. 8 is a side view of FIG. 7 viewed from the left, and FIGS. 9 to 11 are the fourth embodiment. For example, FIG. 9 is a sectional view of the tip of the main body, FIG. 10 is a perspective view of the cam ring, and FIG. 11 is a plan view of FIG. 9 viewed in the direction of arrow A. DESCRIPTION OF SYMBOLS 1... Connection main body, 2... Endoscope, 3... Eyepiece, 4... Insertion opening, 10... Locking piece, 11
...Biasing body, 13...Cam ring, l...Optical axis.

Claims (1)

[Scope of Claims] 1. A connecting portion main body, an insertion opening formed in the main body for accommodating an eyepiece of an endoscope, and a connecting portion pivotally connected to the main body so as to rotate along the optical axis direction. A plurality of locking pieces are provided, one end of which protrudes into the insertion opening, and which abuts against the back surface of the eyepiece when the eyepiece is protruded to prevent the eyepiece from being removed and fixed, and the locking pieces are always protruded. a biasing body that biases in the direction, and a biasing body rotatably supported by the main body around the optical axis, and the rotation presses one end of the locking piece to retract the locking piece from the insertion opening. 1. An endoscope accessory connecting device comprising a cam ring having a cam surface formed on its inner peripheral surface. 2. The endoscope accessory connecting device according to claim 1, wherein the cam ring presses one end of the locking piece in a direction perpendicular to the optical axis. 3. The endoscope accessory connecting device according to claim 1, characterized in that a friction buffer member is interposed between the locking piece and the cam ring to rotate the cam ring. 4. The endoscope accessory connecting device according to claim 3, characterized in that a roller is provided at the other end of the locking piece.