JPH026412Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a connecting device for an endoscope photographing device for connecting a photographing device or the like to an eyepiece of an endoscope.

[Prior art] In body cavity inspection using an endoscope, in addition to visual observation, photographs of affected areas such as ulcers are taken, records of the affected areas are kept, and after the examination is completed, multiple images are taken again based on the photographs. This is useful when doctors are conducting examinations, or when making progress diagnosis by comparing the affected area after treatment, or by connecting a television camera to an endoscope and allowing multiple doctors to observe the inside of the body cavity at the same time to ensure complete diagnosis. When observing an object, a photographing device such as a photographic device or a television photographing device is often connected to the eyepiece of the endoscope.

In such cases, since the imaging device and the eyepiece are connected during endoscopy, the operation of attaching and detaching is not only necessary, but also the operation itself is a preparation for the next attachment. Therefore, even after removal, the device must be ready for the next installation without any additional operations, and the connection must be made by the examiner who is operating the endoscope. It is desirable to be able to easily and quickly hold the endoscope with one hand while using the remaining hand.

[Problems to be solved by the invention] However, the conventional methods for connecting the endoscope eyepiece of an imaging device include a screw-in type, and a method that requires an operation to release a locking claw to secure the connection. In addition, there was a two-action type in which the rear connection device was located in the eyepiece and the locking claw was in a fixed position for connection. Furthermore, even in the case of single-action type devices, devices have been invented in which the outer edge of the connecting device is rotated along the circumference when the device is removed, and the device returns to the initial locked state at the same time as the device is removed. However, in any case, in the case of a rotary operation type, the center of rotation must be fixed in some way, making it difficult for the operator to remove the imaging device while holding the endoscope with one hand. I had no choice but to ask for the help of a caregiver or let go of one hand holding the endoscope and use my left hand to operate the lever of the connection device held by my right hand to remove it. There were defects that caused the endoscope to be dropped or the field of view of the examined area to be changed.

The present invention solves these problems and allows the examiner to easily and quickly connect the eyepiece of the endoscope and the photographing device using the other hand while holding the endoscope in one hand. It is an object of the present invention to provide a connection device for an endoscope photographing device that is capable of performing the following operations and has good operability.

[Examples] Hereinafter, according to the preferred embodiments shown in the attached drawings,
The present invention will be explained in detail.

FIG. 1 is a longitudinal sectional side view showing a connecting device which is an embodiment of the present invention, and FIG. 2 is a longitudinal sectional front view taken from the line - - in FIG. 1. In addition, in Fig. 1, the state in which the eyepiece of the endoscope and the photographing device are connected (hereinafter simply referred to as the connected state) is represented by solid lines, and for some parts, the eyepiece and the photographing device are connected. An unconnected state (hereinafter simply referred to as an unconnected state) is also indicated by a two-dot chain line. On the contrary, in FIG. 2, the unconnected state is shown by solid lines, and the connected state of some members is also shown by two-dot chain lines. FIG. 3 is a longitudinal sectional plan view of the same embodiment seen in a plane perpendicular to the cross section of FIG. 1 (that is, viewed from the - line in FIG. 4);
FIG. 3 is a longitudinal sectional front view showing a connected state as seen from the line - in the figure.

In the figure, 1 is the main body of the connecting device that is integrally fixed to the photographing device (not shown), 2 is the connection part of the connecting device, and 3
is the eyepiece of the endoscope. The main body 1 has a connection part 2
The inner cylinder 4 and the outer cylinder 5 forming the inner cylinder 4 and the outer cylinder 5 are fixed by screws 6 and 7, respectively. The inner cylinder 4 has an insertion opening 8 that has an inner diameter that matches the outer diameter of the eyepiece 3 and allows the insertion of the eyepiece 3, and an insertion opening 8 that abuts the front end surface of the eyepiece 3 and allows the eyepiece 3 to be inserted. A restraining step portion 9 is provided to restrain the above insertion. A plurality of holes 8a are formed in the peripheral wall of the insertion port 8 toward the inside of the insertion port 8, and a locking pin 10 is fitted into each hole 8a. The locking pin 10 is
The tip 10a is rounded into a hemispherical shape, and the rear end has a tsuba 10b.
As shown by the chain double-dashed line in FIG. 1 and the solid line in FIG. 2, the tip 10a is inserted into the hole 8a of the insertion port 8 in the unconnected state by the leaf spring 11 in contact with the collar 10b. It is biased for storage.

A locking pin 10 is provided on the outside of the insertion opening 8 of the inner cylinder 4.
cam surface 1 that comes into contact with the head of the locking pin 10 and restricts the locking pin 10;
A fastening ring 12 having a diameter 2a is provided, and the locking pin 10 is projected or buried in the hole 8a in response to rotation of the fastening ring 12.

As can be seen from FIG. 4, a groove is bored along the outer periphery of the inner cylinder 4, and one end of the spring 13 accommodated in the groove is locked to the inner cylinder 4 with a screw 13a. The other end is locked to the tightening ring 12 by a screw 13b, and the tightening ring 12 is urged counterclockwise in FIG. 2 with respect to the inner cylinder 4. In addition, the stopper step 9 of the inner cylinder 4
A groove 4 other than the above-mentioned groove is provided along the outer circumference of the outer circumference.
A is bored in the groove 4a, one end is pivotally attached to the inner cylinder 4 by the shaft 14, and the other end is inserted into the notch 12b on the side end surface of the tightening ring 12, and the circumferential end surface of the notch 12b is inserted. A semicircular arc-shaped release lever 15 is provided in contact with. The release lever 15 is located at the stopper step 9 of the inner cylinder 4.
A support shaft 16 is provided at a position corresponding to approximately the center of the support shaft 16 , and a release button 17 passing through the outer cylinder 5 is placed on the support shaft 16 . The release button 17 is biased outward by a coil spring 18 inserted into the support shaft 16, and the ring-shaped presser cover 19 is pressed against the collar 17a of the release button 17.
is held down to prevent the release button 17 from falling off. Further, a groove 20 is bored in the inner cylinder 4 along the axis of the connecting device, and a locking pawl 21 is pivotally supported in the inner cylinder 4 in parallel to the groove 20 within this groove 20. The biasing member 22 containing a coil spring biases the locking pawl 21 to rotate clockwise in FIG. The end is exposed inside the insertion opening section 8.

Hereinafter, the operation of the connecting device having the above configuration will be explained.

First, in the unconnected state, the locking pin 10 is urged by the leaf spring 11 and accommodated in the hole 8a, and the locking pawl 21 has one end inserted into the slit 12 of the tightening ring 12.
c, and the other end is exposed from the insertion opening 8. As a result, the tightening ring 1 resists the contraction force of the spring 13.
2 rotation is blocked. In this state, when the endoscope is inserted into the insertion opening 8 of the eyepiece 3, the peripheral end of the eyepiece 3 comes into contact with the end of the locking claw 21, and the locking claw 21 is inserted into the insertion opening 8 of the endoscope. Push up as shown by the solid line in Figure 1. As a result, the locking pawl 21 rotates counterclockwise in FIG. 1 against the biasing force of the biasing member 22.
The other end of the locking pawl 21 comes out of the slit 12c. Then, the tightening ring 12 is released from the locking by the locking pawl 21, and is rotated counterclockwise in FIGS. 2 and 4 by the contraction force of the spring 13. Due to this rotation, the locking pin 10 comes into contact with the cam surface 12a of the tightening ring 12 and is regulated by the tightening ring 12.
is pressed against the biasing force of the leaf spring 11, and the first
As shown by the solid line in the figure, the tip 10a protrudes from the hole 8a and comes into contact with the rear edge of the eyepiece 3, so that the eyepiece 3 and the photographing device are connected.

By slightly tilting the hole 8a so that the tip 10a of the locking pin 10 faces the direction of the locking step 9, it is possible to make the eyepiece 3 have a different shape as shown by the broken line in FIG. Not only can the eyepiece part 3 be locked by the locking pin 10, but also the locking pin 1 can be locked by the locking pin 10.
Even if the zero axis is perpendicular to the axis of the connecting device, the distance to the inclined rear edge of the eyepiece 3 is shortened, so the actuation stroke of the locking pin 10 is shortened, improving operability. It is possible to improve the performance and downsize the device.

Next, when the release button 17 is pressed in the above-mentioned connected state, the collar 17a of the release button 17 comes into contact with the release lever 15, as seen in FIG. oscillate.
As a result of this rocking, the tightening ring 12 that contacts the end of the release lever 15 at the notch 12b rotates clockwise in FIG. 5, and as a result, as shown in FIG. The pressing force of the locking pin 10 is released, and the locking pin 10 is retracted into the hole 8a according to the biasing force of the leaf spring 11. With this, the eyepiece section 3
is disconnected from the connecting device and can exit from inside the insertion port 8.

In the above configuration, instead of the mechanism that swings the tightening ring 12 when the release button 17 is pressed, a tightening member provided with a cam groove or the like that comes into contact with the release button 17 is rotated around the tightening ring 12 when the release button 17 is pressed. A mechanism that moves in the direction may also be adopted. In addition, instead of the mechanism in which the locking claw 21 is rotated by the eyepiece 3 and the tightening ring is rotated by this rotation, a pin is protruded from the stopper step 9 and the eyepiece is inserted. It is also possible to adopt a mechanism in which the pin is pushed by the pusher and the tightening ring is rotated by the push of the pin.

[Effect of the invention] According to the connecting device for an endoscope photographing device according to the present invention, the photographing device and the eyepiece can be connected by simply pushing the eyepiece of the endoscope into the insertion opening of the connecting device. connected,
By simply pressing a release button provided on the outer periphery of the connecting device, the connection between the eyepiece and the photographing device is released. Therefore, even when observing the inside of a body cavity using an endoscope, the examiner can quickly and easily attach and detach the imaging device and the eyepiece using only the other hand while holding the endoscope with one hand. Is possible. However,
The connecting device according to the present invention is extremely simple, as it is only necessary to press the release button with a finger for the disconnecting operation.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view showing a connecting device which is an embodiment of the present invention, Fig. 2 is a longitudinal sectional front view taken from the - line in Fig. 1, and Fig. 3 is a longitudinal sectional view taken from the - line in Fig. 4. FIG. 4 is a longitudinal sectional plan view taken from the line - 1 in FIG. 1, and FIG. 5 is a diagram illustrating the operation when the release button is pressed to remove the eyepiece. 3... Eyepiece part, 8... Insertion opening part, 9... Stopping step part, 10... Locking pin, 12... Tightening ring, 13...
... Spring, 15 ... Release lever, 17 ... Release button, 21 ... Locking claw.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An insertion port that allows insertion of the eyepiece of an endoscope, and a stopper that comes into contact with the front end surface of the eyepiece when the eyepiece is inserted. a receiving portion, two or more holes provided in a radial direction on a side surface of the insertion port toward the inside of the insertion port, and a receiving portion that is inserted into each of the holes;
A locking pin biased toward the outside of the insertion opening,
Normally, each locking pin is located in the hole.
A clamping member assumes a second position in which each locking pin protrudes from the corresponding hole into the insertion opening upon completion of insertion of the eyepiece; A movement restricting member that acts to restrict movement and releases the restricting action on the tightening member in response to insertion of the eyepiece, and a release button that projects from the outer edge and acts perpendicularly to the axis in response to pressure. to move the tightening member from the second position to the first position.
and a release member incorporating a lever device configured to lock the tightening member with the movement regulating member when the locking pin is rotated back to the position and the locking pin is retracted from the eyepiece insertion opening. A connection device for an endoscope imaging device. (2) Utility model registration claim No. 1, in which the hole into which the locking pin is inserted is inclined in the direction of the locking step with respect to a plane perpendicular to the axis of the connecting device. A connection device for the endoscopic imaging device described in 2.