JP2008142145A - Attachment-free structure for endoscope and portable light source unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve an attachment-free structure for an endoscope and a portable light source unit for reliably attaching or detaching a portable light source unit to or from an endoscope in spite of the simple structure and for enabling a user to visually confirm whether the portable light source unit is surely attached. <P>SOLUTION: The attachment-free structure is equipped with a light source connecting cylindrical part 15 having an engaging recessed part 18 formed on the endoscope 10, the portable light source unit 20 having a light emitting insertion portion 29 inserted into and detached from the light source connecting cylindrical part, a rotary clasping member 33 which is pivotally attached on the peripheral surface of the portable light source unit in a manner to rotate and is biased to rotate in the direction of approaching, and an engaging protrusion 35 which is formed on the rotary clasping member and engages the engaging recessed part when the light emitting insertion portion is inserted into the light source connecting cylindrical part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an attachment / detachment structure for an endoscope and a portable light source device.

As a conventional example of a portable endoscope in which a portable light source device can be attached and detached, there is one described in Patent Document 1, for example.
A male screw portion 3c is provided on the side surface of the operation portion 3 of the endoscope 1, and the portable light source device (battery type light source) 5 includes a mounting screw 24 that can be screwed into the male screw portion 3c.
Therefore, the portable light source device 5 can be attached to the endoscope 1 by screwing the mounting screw 24 of the portable light source device 5 into the male screw portion 3 c of the endoscope 1.
Japanese Patent No. 3708387

However, as in Patent Document 1, the operation of screwing the mounting screw 24 of the portable light source device 5 into the male screw portion 3c of the endoscope 1 and the operation of releasing the screwing are not easy. When the endoscope 1 is operated alone without taking the above into account, it is difficult to reliably perform screwing and releasing.
Further, it is not easy to visually confirm whether or not the mounting screw 24 of the portable light source device 5 and the male screw portion 3c of the endoscope 1 are securely screwed together.

  The present invention provides a structure for attaching and detaching an endoscope and a portable light source device that can be securely attached to and detached from an endoscope with a simple structure and that can be visually confirmed whether or not the portable light source device is securely attached. The purpose is to provide.

  The attachment / detachment structure of the endoscope and the portable light source device according to the present invention includes a light source connection cylindrical portion formed in the endoscope, an annular engagement concave portion provided in a concave shape on an outer peripheral surface of the light source connection cylindrical portion, A portable light source device having a light emitting insertion portion that is inserted into and removed from the light source connecting tubular portion, and rotatable in a direction in which the outer peripheral surface of the portable light source device is in contact with and away from the central axis of the portable light source device. A rotating clamping member that is pivotally attached and is urged to rotate in the approaching direction, and the light emitting insertion portion formed on the rotating clamping member is engaged with and disengaged from the engaging recess when the light source connecting cylindrical portion is inserted. And a possible engaging projection.

  It is preferable to provide a plurality of the rotary clamping members in the circumferential direction at equal angular intervals.

  According to another aspect of the attachment / detachment structure of the endoscope and the portable light source device of the present invention, the light source connecting cylindrical portion formed in the endoscope, and the engaging recess recessed in the outer peripheral surface of the light source connecting cylindrical portion And a portable light source device having a light emitting insertion portion that is inserted into and removed from the light source connecting cylindrical portion, and is rotated in a direction in which the outer peripheral surface of the portable light source device is in contact with and away from the central axis of the portable light source device. A rotating clamping member pivotally attached to be movable and urged to rotate in the approaching direction, and the engaging recess when the light emitting insertion portion formed in the rotating clamping member is inserted into the light source connecting cylindrical portion And an engaging projection that can be engaged and disengaged.

  It is preferable to provide a plurality of the same number of the rotation clamping members and the engagement recesses at the same angular interval in the circumferential direction.

  The rotary clamping member has an intermediate portion pivotally attached to the portable light source device, the rotary clamping member having the engagement protrusion at one end thereof, and an end of the rotary clamping member opposite to the one end. It is preferable to provide a pressed portion for rotating the rotary clamping member.

According to the first aspect of the present invention, the rotary holding member provided in the portable light source device is formed in the endoscope in a state where the engaging projection is rotated in the direction away from the engaging concave portion of the light source connecting cylindrical portion. If the light emitting insertion part formed in the portable light source device is inserted into the light source connection cylindrical part and the hand is released from the rotary holding member, the engaging protrusion of the rotary holding member automatically engages with the corresponding engaging recess. . Therefore, the portable light source device can be easily attached to the endoscope.
Further, in a state where the engagement protrusion of the rotation clamping member is engaged with the engagement recess of the light source connection cylindrical portion, the rotation clamp member is rotated to cause the engagement protrusion to escape from the engagement recess of the light source connection cylindrical portion. Then, the portable light source device can be easily detached from the endoscope by moving the light emitting insertion portion in the axial direction of the light source connecting cylindrical portion.
And since the relative position with respect to the light source connection cylindrical part of a portable light source device can be confirmed visually, an operator (operator) can grasp | ascertain easily the connection state of a portable light source device and an endoscope.
Furthermore, since the attachment / detachment structure of the present invention is a simple structure, it can be realized at low cost.

  If it comprises as Claim 2 or 4, it will become possible to couple | bond firmly the engagement protrusion of a rotation clamping member, and the engagement recessed part of a light source connection cylindrical part.

  Further, even when configured as in claim 3, if the circumferential positions of the engagement recesses and the engagement protrusions are matched, the engagement protrusions of the rotary clamping member can be easily engaged with and disengaged from the corresponding engagement recesses. Can do.

  According to the fifth aspect, since the rotation operation of the rotary clamping member can be performed more easily, the attaching / detaching operation of the endoscope and the portable light source device can be performed more easily.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, an endoscope 10 according to the present embodiment is a medical portable endoscope, and includes an operation unit 11 that is held by an operator and a flexibility that extends forward from the operation unit 11. And an eyepiece 13 that is continuous with the rear end of the operation unit 11. An illumination lens and an objective lens (not shown) are provided on the distal end surface of the insertion portion 12, and a light guide fiber 14 whose distal end is connected to the illumination lens inside the operation portion 11 and the insertion portion 12, An image guide fiber (not shown) having a distal end connected to the objective lens and a rear end connected to the eyepiece 13 is provided. When light is supplied to the light guide fiber 14 from the lamp 27 to be operated later, the light is irradiated to the outside from the distal end surface of the insertion portion 12 through the light guide fiber 14 and the illumination lens. Further, when an object (such as an affected part of a patient) is observed with the objective lens, the object image is transmitted to the eyepiece 13 through the objective lens and the image guide fiber, so that the operator looks into the eyepiece 13 to view the object image. Can be observed.

As shown in the drawing, a cylindrical light source connecting cylindrical portion 15 having an open end projects from the side surface of the operation portion 11. As shown in FIGS. 2 and 3, a condensing lens L <b> 1 connected to the end of the light guide fiber 14 is provided at the bottom of the internal space of the light source connecting cylindrical portion 15.
As shown in the drawing, an annular flange 17 projects from the outer peripheral portion of the open end of the light source connecting cylindrical portion 15, and the light source connecting cylindrical portion 15 is provided on the outer peripheral surface of the light source connecting cylindrical portion 15. An annular engaging recess 18 centering on the axis is provided.

The portable light source device 20 attached to and detached from the light source connecting cylindrical portion 15 is a hollow cylindrical body as shown in FIGS. The portable light source device 20 includes a base portion 21 and a lid portion 22 that can be attached to and detached from the opening end of the base portion 21 as large components.
The base portion 21 includes three large constituent members, that is, a lens holding tube 24, an intermediate tube portion 25, and a large diameter tube portion 26. The lens holding cylinder 24 is a cylindrical member that holds a condensing lens L2 composed of three lenses on its inner peripheral surface. The intermediate cylinder part 25 is a hollow cylindrical member, and the lens holding cylinder 24 is fitted and held at the tip part of the inner peripheral surface thereof, and a lamp 27 is provided in the inner space thereof. As shown in the figure, the intermediate cylinder portion 25 has a base portion 28 and an insertion portion (light emission insertion portion) 29 having a smaller diameter than the base portion 28. The outer diameter of the base portion 28 is larger than the inner diameter of the light source connecting cylindrical portion 15, but the outer diameter of the insertion portion (light emitting insertion portion) 29 is smaller than the inner diameter of the light source connecting cylindrical portion 15.

Furthermore, pivot shafts 31 extending in the tangential direction of the outer circumferential surface of the base portion 28 are fixed to a pair of concave portions 30 that are recessed at equal angular intervals in the circumferential direction on the outer circumferential surface of the base portion 28. Is pivotally fitted with a pivot hole 34 formed in the central portion of the inner surface of the rotary clamping member 33 (the pair of rotary clamping members 33 are provided at intervals of 180 ° in the circumferential direction). Engagement protrusions 35 that can be engaged with and disengaged from the engagement recesses 18 project from the tip of the inner peripheral surface of each rotation clamping member 33, and the opposite end of each rotation clamping member 33 is bent. A pressed portion 36 is formed. As shown in the figure, a torsion coil spring S is wound around each pivot shaft 31 such that both ends thereof elastically contact the rotary clamping member 33 and the concave portion 30 of the intermediate cylinder portion 25, respectively. Accordingly, each rotary clamping member 33 can be rotated in a direction to be in contact with and away from the central axis (not shown) of the portable light source device 20, and the engagement projection 35 is further urged by the biasing force of the torsion coil spring S. It is urged to rotate in the direction approaching.
A battery storage space 38 for storing the dry battery B is formed inside the large-diameter cylindrical portion 26, and a cathode-side electrical contact piece 39 that contacts the cathode of the dry battery B at one end of the battery storage space 38. Is provided. The cathode side electrical contact piece 39 is electrically connected to the cathode of the lamp 27.

  Inside the lid part 22, there is provided an anode-side electrical contact piece 40 that comes into contact with the anode of the dry battery B when the lid part 22 is attached to the large-diameter cylindrical part 26. Further, an internal switch 41 is provided inside the lid portion 22 to connect to the anode side electrical contact piece 40 and the anode of the lamp 27. The internal switch 41 is in an ON state that allows the flow of electricity between the anode of the lamp 27 and the anode-side electrical contact piece 40 each time the button 42 is pressed, and the anode and anode-side electrical connection of the lamp 27. It switches to the OFF state which interrupts | blocks the electric flow between the pieces 40. FIG. An elastic cover 43 made of elastically deformable rubber is fitted and fixed to the opening of the lid portion 22. When the surgeon elastically deforms the elastic cover 43 toward the internal switch 41 with a finger, the elastic cover 43. The button 42 is pushed in via the button. Therefore, each time the operator pushes the button 42 with the finger through the elastic cover 43, the internal switch 41 is switched between the ON state and the OFF state.

Next, how to attach and detach the endoscope 10 and the portable light source device 20 and how to use the portable light source device 20 at the time of wearing will be described.
First, a procedure for attaching the portable light source device 20 to the endoscope 10 will be described.
First, the dry battery B is stored in the battery storage space 38 of the base 21 with the cover 22 removed from the base 21, and then the cover 22 is connected to the base 21 (large diameter cylindrical portion 26). As indicated by the phantom lines in FIG. 2, the pair of rotary clamping members 33 are in contact with the outer peripheral surface of the intermediate cylindrical portion 25 by the rotational biasing force of the torsion coil spring S, so The pressed portion 36 of the rotary clamping member 33 is pressed to rotate the pair of rotary clamping members 33 until the pressed portion 36 contacts the outer peripheral surface of the large diameter cylindrical portion 26 (see FIG. 2). In this state, the lens holding cylinder 24 and the intermediate cylinder part 25 of the portable light source device 20 are inserted into the light source connection cylindrical part 15, and the end face of the base part 28 is set to the end face of the light source connection cylindrical part 15 as shown in FIG. Make contact.
When the end surface of the base portion 28 is in contact with the end surface of the light source connecting cylindrical portion 15 in this way, the finger is released from the pair of rotary clamping members 33. Then, as shown in FIG. 3, the pair of rotary clamping members 33 are rotated by the rotational biasing force of the torsion coil spring S, and the respective engagement protrusions 35 are automatically engaged with the engagement recesses 18, respectively. The device 20 is prevented from coming out of the light source connecting tubular portion 15.
If the elastic cover 43 of the portable light source device 20 is pushed once in this state, the internal switch 41 is switched from the OFF state to the ON state when the button 42 is pushed, so that the lamp 27 is turned on. The light generated by the lamp 27 is transmitted to the light guide fiber 14 via the condenser lens L2 and the condenser lens L1, and is irradiated to the outside from the illumination lens provided at the distal end of the insertion portion 12 of the endoscope 10.

Next, how to remove the portable light source device 20 from the endoscope 10 will be described.
In this case, the surgeon presses the pressed portions 36 of the pair of rotary holding members 33 again by hand, and rotates the rotary holding member 33 to the position indicated by the solid line in FIG. Then, since each engagement protrusion 35 escapes from the engagement recess 18, if the portable light source device 20 is slid to the right side of FIG. 3 with respect to the light source connection cylindrical portion 15, the portable light source device 20 is connected to the light source. It can be easily extracted from the cylindrical portion 15.

As described above, according to the present embodiment, the portable light source device 20 can be easily attached to and detached from the light source connecting cylindrical portion 15, so that the surgeon performs an examination alone without an assistant. Even if it exists, the surgeon can attach and detach the portable light source device 20 to the endoscope 10 easily and smoothly.
In addition, since the surgeon can visually confirm whether or not the engagement protrusions 35 of the pair of rotary clamping members 33 are fitted in the engagement recesses 18, the surgeon can connect the portable light source device 20 and the endoscope 10. The connection state can be easily grasped.
Furthermore, since the attachment structure of the endoscope 10 and the portable light source device 20 of the present invention is a simple structure, it can be realized at low cost.

Furthermore, since the pair of rotation clamping members 33 are provided at equal angular intervals (180 °) in the circumferential direction, the light source connecting tubular portion 15 is paired with the pair of rotation clamping members 33 when the engagement protrusions 35 engage with the engagement recesses 18. Is sandwiched from the opposite direction. Therefore, the holding state of the light source connecting cylindrical portion 15 by the rotation clamping member 33 is stable.
In addition, since the engaging projection 35 of the rotary clamping member 33 is elastically engaged with the engaging recess 18, rattling between the portable light source device 20 and the light source connecting tubular portion 15 is prevented.
Further, since the engaging recess 18 is a recess formed over the entire circumference of the light source connecting cylindrical portion 15, no matter what the relative rotational position of the portable light source device 20 and the light source connecting cylindrical portion 15 is. The engaging protrusions 35 of the pair of rotary clamping members 33 can be reliably engaged with the engaging recesses 18.
In addition, since the pressed portion 36 is formed on the rotation clamping member 33, the rotation operation of the rotation clamping member 33 is easy.

As mentioned above, although this invention was demonstrated using the said embodiment, this invention is not limited to the said embodiment, It can implement, giving various changes.
For example, instead of providing the annular engagement recess 18 in the light source connection cylindrical portion 15, a pair of discontinuous engagement recesses (not shown) are provided in the light source connection cylindrical portion 15 at equal angular intervals in the circumferential direction. The engagement protrusions 35 of the pair of rotary clamping members 33 may be engaged with and disengaged from the respective engagement recesses.
Furthermore, the number of the rotation clamping members 33 is not two but one (in this case, in the case where the annular engaging recess 18 is provided in the light source connecting cylindrical portion 15 and the discontinuous engaging recesses are formed mutually) There may be one non-continuous engaging recess), or a plurality of three or more. Attachment position of each rotary clamping member 33 when three or more rotary clamping members 33 are provided (and further, if the same number of non-continuous engaging concave portions as the rotational clamping members 33 are formed in the light source connecting cylindrical portion 15, each engaging concave portion It is desirable that the formation position of the) be equiangularly spaced in the circumferential direction.
Furthermore, although the endoscope 10 of the present embodiment is a medical endoscope, it can be applied to endoscopes having different uses such as industrial endoscopes.

1 is an overall view of an endoscope according to an embodiment of the present invention. It is a cross-sectional top view when a portable light source device is removed from the light source connection cylindrical part. It is a cross-sectional plan view when a portable light source device is attached to the light source connecting cylindrical part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Endoscope 11 Operation part 12 Insertion part 13 Eyepiece part 14 Light guide fiber 15 Light source connection cylindrical part 17 Grow part 18 Engagement recessed part 20 Portable light source device 21 Base part 22 Lid part 24 Lens holding cylinder 25 Intermediate cylinder part 26 Large diameter cylindrical portion 27 Lamp 28 Base portion 29 Insertion portion (light emission insertion portion)
30 Recess 31 Pivoting shaft 33 Rotating clamping member 34 Pivoting hole 35 Engaging projection 36 Pressed portion 38 Battery receiving space 39 Cathode side electric contact piece 40 Anode side electric contact piece 41 Internal switch 42 Button 43 Elastic cover B Dry battery L1 Optical lens L2 Condensing lens S Torsion coil spring

Claims (5)

A light source connecting cylindrical portion formed on the endoscope;
An annular engaging recess recessed in the outer peripheral surface of the light source connecting cylindrical portion;
A portable light source device having a light emitting insertion part inserted into and removed from the light source connecting cylindrical part;
A rotary clamping member pivotally attached to the outer peripheral surface of the portable light source device so as to be rotatable in a direction approaching and separating from the central axis of the portable light source device, and rotated and biased in an approaching direction;
An engaging protrusion formed on the rotary clamping member, the engaging protrusion being detachable from the engaging recess when the light emitting insertion portion is inserted into the light source connecting cylindrical portion;
An attachment / detachment structure for an endoscope and a portable light source device, comprising: In the attachment / detachment structure of the endoscope according to claim 1 and the portable light source device,
An attachment / detachment structure of an endoscope and a portable light source device, in which a plurality of the above-described rotating clamping members are provided at equal angular intervals in the circumferential direction. A light source connecting cylindrical portion formed on the endoscope;
An engaging recess recessed in the outer peripheral surface of the light source connecting cylindrical portion;
A portable light source device having a light emitting insertion part inserted into and removed from the light source connecting cylindrical part;
A rotary clamping member pivotally attached to the outer peripheral surface of the portable light source device so as to be rotatable in a direction approaching and separating from the central axis of the portable light source device, and rotated and biased in an approaching direction;
An engaging protrusion formed on the rotary clamping member, the engaging protrusion being detachable from the engaging recess when the light emitting insertion portion is inserted into the light source connecting cylindrical portion;
An attachment / detachment structure for an endoscope and a portable light source device, comprising: In the attachment structure of the endoscope and portable light source device according to claim 3,
An attachment / detachment structure for an endoscope and a portable light source device, in which a plurality of the same number of the rotation clamping members and the engagement recesses are provided at the same angular interval in the circumferential direction. In the attachment or detachment structure of the endoscope and portable light source device according to any one of claims 1 to 4,
The rotation clamping member has an intermediate portion pivoted to the portable light source device,
Having the engagement protrusion at one end of the rotary clamping member;
An attachment / detachment structure of an endoscope and a portable light source device, each of which includes a pressed portion for rotating the rotary clamping member at an end opposite to the one end of the rotary clamping member.

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