CN113440090B - Split medical endoscope - Google Patents
Split medical endoscope Download PDFInfo
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- CN113440090B CN113440090B CN202010210464.0A CN202010210464A CN113440090B CN 113440090 B CN113440090 B CN 113440090B CN 202010210464 A CN202010210464 A CN 202010210464A CN 113440090 B CN113440090 B CN 113440090B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/07—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements using light-conductive means, e.g. optical fibres
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00163—Optical arrangements
- A61B1/00165—Optical arrangements with light-conductive means, e.g. fibre optics
- A61B1/00167—Details of optical fibre bundles, e.g. shape or fibre distribution
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Abstract
The invention relates to a split medical endoscope which can overcome the size limitation of the endoscope and improve the light guide rate. The split type medical endoscope comprises a proximal core body, a distal core body, a proximal glass fiber bundle and a distal glass fiber bundle, wherein the distal core body and the proximal core body are detachably connected, the proximal glass fiber bundle is arranged in the proximal core body, the distal glass fiber bundle is arranged in the distal core body, the proximal glass fiber bundle comprises a plurality of proximal glass fibers which are arranged in a bundle, the proximal glass fibers comprise a light source end, a light guide section and an emission end which are sequentially connected, and the emission ends of all the proximal glass fibers are fused into an integrated light condensing part; the distal glass fiber bundle comprises a plurality of distal glass fibers, and one ends of the plurality of distal glass fibers are thermally fused to form an integrated receiving part; the light condensing portion and the receiving portion are configured to: when the distal core and the proximal core are connected, the light condensing portion condenses light transmitted from the light guide sections of all the proximal glass optical fibers to the receiving portion.
Description
Technical Field
The invention relates to a split medical endoscope.
Background
The existing endoscope is divided into an operating portion (also called a proximal portion) for a doctor's operation and an insertion portion (also called a distal portion) for insertion into the human body, which are detachably connected so that the portion inserted into the human body is disposable and replaceable, avoiding cross infection between patients. With the advent of such split designs, the glass fiber bundles in the endoscope are also split, i.e., the glass fiber bundles in the proximal portion are used to connect with the light source and conduct light, and the glass fiber bundles in the distal portion interface with the glass fiber bundles in the proximal portion to receive light from the light source and transmit the light to the front end of the distal portion for ejection. Therefore, the light guide rate of the split glass fiber bundles is only a fraction of that of the continuous glass fiber bundles, so that the front end of the endoscope is insufficient in illumination, and the imaging effect is further affected.
Generally, in order to increase the light guiding rate, the light guiding area of the glass fiber bundle is increased, that is, the volume of the glass fiber bundle is increased. However, since the size of the endoscope is limited, the structure for attaching the glass fiber bundle to the endoscope, particularly the structure for fixing both ends of the glass fiber bundle to the endoscope, is limited, and thus it is difficult to increase the light guide rate by increasing the volume of the glass fiber bundle in the field of the endoscope.
Disclosure of Invention
The invention aims to solve the technical problem of contradiction between the improvement of the light guide rate of the split medical endoscope and the size limitation of the endoscope mounting structure on the glass fiber bundle.
In order to solve the technical problems, the main technical scheme adopted by the invention comprises the following steps:
the invention provides a split medical endoscope, which comprises a proximal core body, a distal core body, a proximal glass optical fiber bundle and a distal glass optical fiber bundle, wherein the distal core body and the proximal core body are detachably connected; the distal glass fiber bundle comprises a plurality of distal glass fibers, and one ends of all the distal glass fibers are thermally fused to form an integrated receiving part; the light condensing portion and the receiving portion are configured to: when the distal core and the proximal core are connected, the light condensing portion condenses light transmitted from the light guide sections of all the proximal glass optical fibers to the receiving portion.
Preferably, the light source ends of all the proximal glass fibers are hot-melt formed into an integral light source connection part; in the projection of the plane perpendicular to the center line of the proximal glass fiber bundle, the projections of the light source connection portion and the light condensing portion are located within the projection range of the light guide sections of all the proximal glass fibers.
Preferably, the light gathering part comprises a first end part connected with the light guide sections of all the proximal glass optical fibers and a second end part far away from the light guide sections; the condensing part has the following two structures: structure one: the light condensing part comprises a round table, and the small end face of the round table forms the end face of the second end part; and (2) a structure II: an end face of the second end of the light condensing portion is configured as a spherical surface.
Preferably, the light guide sections of the plurality of proximal glass fibers are gathered to form a light guide portion of the proximal glass fiber bundle; the diameter of the light source connecting part is 3mm-4mm, and the diameter of the light guide part is 4mm-5mm; when the light-gathering part comprises a circular table, the diameter of the first end part of the light-gathering part is 4mm-5mm, and the diameter of the second end part of the light-gathering part is 3mm-4mm; when the end face of the second end part of the light condensing part is in a spherical surface, the rest parts except the second end part of the light condensing part are cylinders, and the diameter of each cylinder is 3mm-4mm; the diameter of the receiving portion is 3mm-4mm.
Preferably, the proximal glass fiber bundle comprises a first metal sleeve, a hose and a second metal sleeve which are sequentially connected, wherein the first metal sleeve wraps the light source connecting part, the hose wraps the light guide section, and the second metal sleeve wraps the light condensing part; a first mounting hole is formed in the proximal core body, the second metal sleeve is directly sleeved with the first mounting hole, or the second metal sleeve is sleeved with a first metal connecting pipe in the first mounting hole, and one end, close to the distal glass fiber bundle, of the second metal sleeve is opposite to the first mounting Kong Sujin; the distal glass fiber bundle comprises a third metal sleeve wrapping the receiving part, and the receiving part is flush with the end face of one end, close to the proximal glass fiber bundle, of the third metal sleeve; the distal core body is internally provided with a second mounting hole, the third metal sleeve is directly sleeved with the second mounting hole, one end, close to the proximal glass optical fiber bundle, of the third metal sleeve is inserted into the first mounting hole to be abutted with the second metal sleeve, or the third metal sleeve is sleeved with a second metal connecting pipe in the second mounting hole, and one end, close to the proximal glass optical fiber bundle, of the third metal sleeve and the second metal connecting pipe is inserted into the first mounting hole to be abutted with the second metal sleeve; when the light condensing part comprises a circular truncated cone, the light condensing part is coaxial with the receiving part, the second end part of the light condensing part is propped against the receiving part, and the diameter of the receiving part is smaller than or equal to that of the second end part; when the second end of the light condensing portion is configured as a spherical surface, the second end of the light condensing portion is spaced from the receiving portion, and the diameter of the receiving portion is equal to or smaller than the diameter of the small end of the imaginary circumscribed cone of the spherical surface.
Preferably, the first metal sleeve is adhered to the light source connecting part; the light condensing part is adhered to the second metal sleeve; the receiving part is adhered with the third metal sleeve; the sleeving is connected by threads or is bonded; in the case that the condensing part includes a circular truncated cone: the end face of the second end part of the light condensing part is flush with the outer end face of the second metal sleeve, and the inner wall of the second metal sleeve is matched with the light condensing part in shape; under the condition that the second metal sleeve is directly sleeved with the first mounting hole, the outer wall of the second metal sleeve is matched with the inner wall of the first mounting hole in shape, and the first mounting hole is a circular hole with the same diameter; under the condition that the second metal sleeve is sleeved with the first metal connecting pipe, the first mounting hole is a circular hole with the same diameter, the first metal connecting pipe is a circular pipe with the same outer diameter and the same wall thickness, and the outer wall of the second metal sleeve is matched with the inner wall of the first metal connecting pipe in shape; in the case where the second end portion of the light condensing portion is configured as a spherical surface: the second metal sleeve is a circular tube with equal outer diameter and equal wall thickness; under the condition that the second metal sleeve is directly sleeved with the first mounting hole, the first mounting hole is a circular hole with the same diameter; under the condition that the second metal sleeve is sleeved with the first metal connecting pipe, the first mounting hole is a round hole with the same diameter, and the first metal connecting pipe is a round pipe with the same outer diameter and the same wall thickness; the second mounting hole is a stepped hole; under the condition that the third metal sleeve is directly sleeved with the second mounting hole, the outer wall of the third metal sleeve is matched with the second mounting hole to form a step shape; under the condition that the second metal sleeve is sleeved with the second metal connecting pipe, the outer wall of the second metal connecting pipe is matched with the second mounting hole to form a stepped shape, a stepped hole is formed in the second metal connecting pipe, and the outer wall of the third metal sleeve is matched with the stepped hole in the second metal connecting pipe to form a stepped shape.
Preferably, the device also comprises a bolt, a key and a lock rod; one end of the bolt is fixed on one of the distal core body and the proximal core body, and the other end of the bolt is inserted in the other of the distal core body and the proximal core body in a pluggable manner; one end of the lock rod is fixed on the key, and the other end of the lock rod is movably inserted into a part inserted by the bolt; the key can drive the lock rod to move between a locking position for preventing the plug pin from being inserted and an unlocking position for allowing the plug pin to be inserted under the action of external force.
Preferably, the plug direction of the plug pin is perpendicular to the moving direction of the lock rod; the pin is provided with a first groove, and the lock rod is provided with a second groove: when the lock rod is positioned at the locking position, the first groove is positioned in a part inserted by the bolt, the first groove and the second groove are staggered, and the lock rod is partially embedded in the first groove; when the lock lever is in the unlocked position, the second recess is aligned with the first recess and the latch can move past the second recess to thereby engage or disengage the component into which it is inserted.
Preferably, a bolt jack is arranged in a part inserted by the bolt, the bottom of the bolt jack forms a bolt in-place structure, the bolt is slidably jointed with the bolt jack, and one end of the bolt for jointing with the bolt jack is provided with a front end guiding structure; a lock rod jack is arranged in a part inserted by the bolt, the extending direction of the lock rod jack is perpendicular to the extending direction of the bolt jack, the bottom of the lock rod jack forms a lock rod in-place structure, and the lock rod is slidably connected with the lock rod jack; when the bolt is abutted against the bolt in-place structure, the lock rod can move between an unlocking position and a locking position; when the lock rod is abutted against the lock rod in-place structure, the lock rod is positioned at the unlocking position.
Preferably, the device further comprises a spring; the spring is elastically supported between the key and the part inserted by the bolt; when the lock rod is positioned at the locking position, the spring is in a natural state; the spring stores force in the process that the lock rod moves from the locking position to the unlocking position; the other end of the bolt is configured as a cylinder with an annular first groove; the second groove is an arc-shaped groove, and the radius of the arc-shaped groove is larger than that of the cylinder with the annular first groove.
The beneficial effects of the invention are as follows:
the proximal glass fiber bundle in the split medical endoscope is provided with the integrated light condensing part, at the moment, the light guiding area of the light transmitting part of the proximal glass fiber bundle can be increased, then light is focused through the light condensing part and then transmitted to the distal glass fiber bundle, meanwhile, the light condensing part has the light condensing effect without the same light guiding area as the light transmitting part of the proximal glass fiber bundle, namely, the size of the light condensing part can be reduced relative to the light transmitting part of the proximal glass fiber bundle, thereby overcoming the size limitation of the endoscope, simultaneously improving the light guiding rate, improving the front end lighting effect of the endoscope and further improving the imaging effect.
In addition, the split medical endoscope is characterized in that the distal core body and the proximal core body are detachably connected through the bolt, the bolt is locked through the lock rod to lock the connection of the distal core body and the proximal core body, and the lock rod is driven to lock and unlock through the key.
Drawings
FIG. 1 is a schematic front view of a split medical endoscope according to a first embodiment;
FIG. 2 is a schematic view in partial cross-section of the split medical endoscope of FIG. 1;
FIG. 3 is a schematic view, partially in section, of the split medical endoscope of FIG. 1 at angle A;
FIG. 4 is a schematic view in partial cross-section at angle B of the split medical endoscope of FIG. 1;
FIG. 5 is a schematic view in partial cross-section of a split medical endoscope provided in accordance with a second embodiment;
FIG. 6 is a schematic view in partial cross-section of a split medical endoscope provided in accordance with a third embodiment;
fig. 7 is a schematic partial sectional view of a split medical endoscope provided in the fourth embodiment.
[ reference numerals ]
1: a proximal glass fiber bundle; 11: a light source end; 12: a light guide section; 13: an ejection end; 14: a light-gathering section; 15: a light source connection part; 16: a first end; 17: a second end; 18: a second metal sleeve;
2: a proximal core; 21: a first mounting hole; 22: a first metal connection pipe;
3: a distal core; 31: a second mounting hole; 32: a second metal connection pipe; 33: a latch in place structure; 34: a lock rod in place structure; 35: a plug jack; 36: a lock rod jack;
4: a distal glass fiber bundle; 41: a receiving section; 42: a third metal sleeve; a: imaginary circumscribed vertebral body;
5: a proximal housing;
6: a distal housing.
7: a plug pin; 71: a first groove; 72: front end guiding structure
8: a key;
9: a lock lever; 91: a second groove;
10: and (3) a spring.
Detailed Description
The invention will be better explained by the following detailed description of the embodiments with reference to the drawings.
Example 1
Referring to fig. 1 to 4, the present embodiment provides a split-type medical endoscope including a proximal glass fiber bundle 1, a proximal core 2, a distal core 3, a distal glass fiber bundle 4, a proximal housing 5, a distal housing 6, a latch 7, a key 8, a lock lever 9, and a spring 10.
The proximal core 2 is fixed within a proximal housing 5. The distal core 3 is secured within a distal housing 6. The proximal core 2 and the distal core 3 are detachably connected. Thereby, the proximal housing 5 and the distal housing 6 and the proximal portion and the distal portion are detachably connected.
One end of the proximal glass fiber bundle 1 is mounted to the proximal core 2. The proximal glass fiber bundle 1 includes a plurality of proximal glass fibers arranged in a bundle, for example, assembled into a bundle using 6000-8000 glass fibers having a diameter of 38 μm. Each proximal glass fiber comprises a light source end 11, a light guide section 12 and an emitting end 13, which are sequentially connected, wherein the light source end 11 is connected with a light source to receive light, and the light guide section 12 conducts the light of the light source in the proximal glass fiber until the light is conducted to the emitting end 13. Here, the light source ends 11 of all the near-side glass optical fibers are integrally formed by thermal fusion into the light source connection part 15, and the light source connection part 15 is constructed in a structure to be connected to the light source in a plug-in manner, whereby the light source connection part 15 for connection to the light source transmits light from the light source to the respective light guide sections 12 of all the near-side glass optical fibers. The light guide sections 12 of the plurality of proximal glass fibers are gathered to form the light guide portion of the proximal glass fiber bundle. The emitting ends 13 of all the proximal glass fibers are formed into an integral light condensing portion 14 by thermal fusion, and the light condensing portion 14 is configured to focus and emit light transmitted from the light guiding sections 12 of all the proximal glass fibers. Therefore, through the arrangement mode of the integrated light condensing part 14, the light guide area of the light guide part of the near side glass fiber bundle can be increased, meanwhile, the light condensing part 14 does not need to have the same light guide area as the light guide part of the near side glass fiber bundle due to the light condensing effect, namely, the size of the light condensing part 14 can be reduced relative to the light guide part of the near side glass fiber bundle, thereby overcoming the size limitation of an endoscope, improving the light guide rate, improving the front end lighting effect of the endoscope and further improving the imaging effect. For example, if the existing mounting structure allows the mounted proximal glass fiber bundle to have a diameter of 4mm, then only 5000-6000 fibers of 38 μm can be used to form the proximal glass fiber bundle, and the diameter of the light guiding area is less than 4mm because of the gaps between the fibers. More optical fibers can be used at present, so that the diameter of the light guide part reaches 5mm, the light guide area is increased by using more optical fibers, and the light guide can be installed in the existing endoscope through the light condensing part with the diameter of 4mm and condensed light is emitted.
In the present embodiment, in the projection of the plane perpendicular to the center line of the proximal glass fiber bundle, the projections of the light source connection portion 15 and the light condensing portion 14 are located within the projection range of the light guide sections 12 of the plurality of proximal glass fibers, thereby ensuring an increased light guide area while fitting the size range allowed by the proximal glass fiber bundle mounting structure.
In this embodiment, the light gathering portion 14 includes opposite first and second ends 16, 17, the first end 16 being connected to the light guiding segments 12 of the plurality of proximal glass optical fibers and the second end 17 being remote from the light guiding segments 12. In the present embodiment, the light condensing portion 14 is composed of a cylindrical body including a first end portion 16 and a second end portion 17, and an end face of the second end portion 17 is configured as a spherical surface. It will be appreciated that the second end 17 may not be entirely spherical here, but rather may be partially spherical as shown in the figures, capable of converging light.
In the present embodiment, the light source connection portion 15 is entirely cylindrical. And the diameter of the light source connection part 15 is 3mm-4mm, and the diameter of the light guide part is 4mm-5mm. The diameter of the cylinder of the light condensing portion 14 is 3mm-4mm. It is inevitable that the diameter of the cylindrical body of the light source connection portion 15 and the diameter of the cylindrical body of the light converging portion 14 are smaller than the diameters of the light conducting sections 12 of the plurality of light guides.
In this embodiment, the proximal glass fiber bundle 1 includes a first ferrule (not shown), a hose (not shown), and a second ferrule 18. The first metal sleeve wraps the light source connection portion 15, the hose wraps the light guide section 12, and the second metal sleeve 18 wraps the light condensing portion 14. The first metal sleeve, hose and second metal sleeve 18 are connected in sequence. Wherein, the first metal sleeve is connected with the light source connecting part 15 and the light condensing part 14 is connected with the second metal sleeve 18 in an adhesive manner, and the outer circumferential surface of the second metal sleeve 18 is provided with threads.
In this embodiment, the proximal core 2 is provided with a first mounting hole 21, and a first metal connecting pipe 22 is fixed in the first mounting hole 21 by means of bonding or threaded connection, etc., and an end surface of the first metal connecting pipe 22 near the distal core 3 is flush with an edge of the first mounting hole 21 on the side. Further, the second metal sleeve 18 is sleeved with the first metal connection tube 22, and an end of the second metal sleeve 18 near the distal core 3 (i.e., near the distal glass fiber bundle 4) is retracted with respect to the first mounting hole 21, the purpose of this retraction being to form a space for insertion of the distal glass fiber bundle 4 and a cannula outside thereof.
In this embodiment, the first mounting hole 21 is a circular hole with equal diameter, the first metal connecting pipe 22 is a circular pipe with equal diameter and equal wall thickness, and the second metal sleeve 18 is a circular pipe with equal diameter and equal wall thickness. The inner wall of the first metal connecting pipe 22 is provided with internal threads, and the first metal connecting pipe 22 is in threaded connection with the second metal sleeve 18. Of course, in other embodiments, the first metal connecting tube 22 and the second metal sleeve 18 may be fixed by adhesion.
One end of a distal glass fiber bundle 4 is mounted to the distal core 3. The distal glass fiber bundle 4 includes a plurality of distal glass fibers, for example, 3000 to 4000 glass fibers having a diameter of 38 μm. One end of all distal glass fibers is heat-fused into an integral receiving portion 41, and the other end of all distal glass fibers is divided into a plurality of illumination structures extending to the front end of the distal portion, respectively, in the drawing, two strands are taken as an example, and before connecting the illumination structures, each distal glass fiber is also heat-fused into an integral emitter.
In the present embodiment, the light condensing portion 14 and the receiving portion 41 are cooperatively configured as: when the distal core 3 and the proximal core 2 are connected, the light condensing portion 14 condenses the light transmitted from the light guide section 12 to the receiving portion 41. In the case where the end face of the second end of the light-condensing portion 14 is an arc face in the present embodiment, the second end 17 of the light-condensing portion 14 is spaced from the receiving portion 41, and the diameter of the receiving portion 41 is equal to or smaller than the diameter of the small end of the imaginary circumscribed cone a of the spherical surface, so that the receiving portion 41 receives all the light emitted from the light-condensing portion 14 as much as possible, especially when the diameter of the receiving portion 41 is smaller than the diameter of the small end of the imaginary circumscribed cone a, even when there is an assembly error between the distal core 3 and the proximal core 2.
In this embodiment, the second mounting hole 31 is provided in the proximal core 2, the distal glass fiber bundle 4 includes a third metal sleeve 42 surrounding the receiving portion 41, the receiving portion 41 is bonded to the third metal sleeve 42, and one end face of the receiving portion 41 and one end face of the third metal sleeve 42, which are close to the proximal glass fiber bundle 1, are flush. The second metal connecting pipe 32 is fixed in the second mounting hole 31 through threaded connection or bonding, the third metal sleeve 42 is sleeved with the second metal connecting pipe 32, and the end faces of the second metal sleeve 42 and the end face of the second metal sleeve close to the proximal glass fiber bundle are flush, so that a plug is formed by the receiving part 41, the third metal sleeve 42 and the end of the second metal connecting pipe 32 close to the proximal glass fiber bundle 1. The plug is inserted into the first mounting hole 21 and abuts the second metal sleeve 18. When the second metal connection pipe 32 abuts against the second metal sleeve 18, the distance between the light condensing portion and the receiving portion happens to be appropriate.
In the present embodiment, the second mounting hole 31 is a stepped hole. The outer wall of the second metal connecting pipe 32 is matched with the second mounting hole 31 to form a step shape, a step hole is formed in the second metal connecting pipe 32, and the outer wall of the third metal sleeve 42 is matched with the step hole in the second metal connecting pipe 32 to form a step shape. Therefore, when the distal glass fiber bundle 4 and the second metal connecting pipe 32 are installed to the second installation hole 31, the axial position is accurately fixed, and the distance between the light condensing part and the receiving part when the second metal connecting pipe 32 is abutted with the second metal sleeve 18 is further ensured to be proper.
Further, one end of the latch 7 is configured as a cylinder with external threads for screwing with a hole with internal threads in the proximal core 2, thereby fixing the latch 7 to the proximal core 2, both moving synchronously. The other end of the bolt 7 is also configured as a cylinder with an annular first recess 71 and the front end of the cylinder has a front end guide 72. Wherein the diameter of the cylinder with the first recess 71 in the plug 7 is larger than the diameter of the cylinder with the external thread.
In cooperation, a latch jack 35 is provided in the distal core 3, and the bottom of the latch jack 35 constitutes a latch-in-place structure 33. The cylinder of the latch 7 having the first groove 71 slidably engages the latch receptacle 35, and when the front end of the cylinder of the latch 7 having the first groove 71 abuts the latch-in-place structure 33, the latch 7 is in place, and the proximal core 2 and the distal core 3 abut. The front end guide structure 72 provides a guide function during insertion of the plug 7 into the plug insertion hole 35. In the present embodiment, the front end guiding structure 72 is a cylindrical front end with a bevel cut, however, in other embodiments, the front end guiding structure 72 may be a conical surface or the like.
Thereby, one end of the plug 7 is fixed to the proximal core 2, and the other end of the plug 7 is inserted in the distal core 3 so as to be pluggable. Of course, the invention is not limited thereto, and in other embodiments, the latch 7 may be fixed to the distal core 3 to be removably inserted with the proximal core 2.
It should be noted that "one end" and "the other end" of the latch 7 refer to the portions of the latch 7 that cooperate with the distal core 3 and the proximal core 2, and as can be seen from fig. 3, in this embodiment, the latch 7 is divided into two portions that cooperate with the distal core 3 and the proximal core 2, respectively, so that "one end" and "the other end" of the latch 7 are these two portions. If in other embodiments the distal core 3 and the proximal core 2 do not abut after the latch 7 is in place, there may be a third portion between "one end" and "the other end" of the latch 7, i.e. a portion that does not mate with either the distal core 3 or the proximal core 2.
It should be noted that the above-mentioned "slidably engaged" means that the inner walls of the latch 7 and the latch insertion hole 35 are in contact but such contact does not affect smooth insertion and extraction of both, thereby ensuring the mounting accuracy of the distal core 3 and the proximal core 2, and thus the distal portion and the proximal portion.
The key 8 is located outside the distal housing 6 and the proximal housing 5.
One end of the lock lever 9 is fixed with the key 8.
The other end of the lock lever 9 is movably inserted in a member (i.e., the distal core 3 in this embodiment) in which the latch 7 is inserted. Specifically, a lock rod insertion hole 36 is provided in the component (i.e., the distal core 3 in this embodiment) into which the latch 7 is inserted, and the bottom of the hole of the lock rod insertion hole 36 constitutes a lock rod in-place structure 34, and the "other end of the lock rod 9" described above is slidably engaged with the lock rod insertion hole 36. It should be noted that "slidably engaged" herein means that the inner walls of the lock lever 9 and the lock lever insertion hole 36 are in contact but such contact does not affect smooth insertion and extraction of both, thereby ensuring smooth locking and unlocking (described in detail later) between the lock lever 9 and the latch 7.
It should be noted that "one end" and "the other end" of the lock lever 9 refer to portions of the lock lever 9 that are engaged with the key 8 and the component (i.e., the distal core 3 in the present embodiment) in which the plug 7 is inserted, and as can be seen from fig. 3, the plug 7 is divided into three portions, the first portion is engaged with the component (i.e., the distal core 3 in the present embodiment) in which the plug 7 is inserted, the second portion is engaged with the component (i.e., the distal core 3 in the present embodiment) in which the plug 7 is inserted, and the third portion is located intermediate the first portion and the second portion, and is engaged with neither the key 8 nor the component (i.e., the distal core 3 in the present embodiment) in which the plug 7 is inserted.
Further, the extending direction of the lock lever insertion hole 36 is perpendicular to the extending direction of the latch insertion hole 35, whereby the inserting and extracting direction of the latch 7 is perpendicular to the moving direction of the lock lever 9.
The lock lever 9 has a second groove 91, and the second groove 91 is an arc groove, and the radius of the arc groove is larger than the radius of a cylinder inserted into the distal core 3 in the latch 7.
The spring 10 is elastically supported between the key 8 and the member in which the plug 7 is inserted (i.e., the distal core 3 in this embodiment). In the present embodiment, two springs 10 are provided.
As can be seen from the figure, four pins 7 are provided in a rectangular shape in the present embodiment, two lock bars 9 are provided corresponding to the two pins 7, respectively, i.e., one lock bar 9 is engaged with the two pins 7 located on one side of the four pins 7, and the other lock bar 9 is engaged with the two pins 7 located on the other side of the four pins 7, whereby two second grooves 91 are provided on each lock bar 9 for engagement with the first grooves 71 of the corresponding two pins 7.
The lock lever 9 is movable along the first groove when the latch 7 abuts against the latch-in-place structure 33, and is thus movable between the unlocked position and the locked position.
When the lock lever 9 is in the locking position, the first groove 71 is located in the part (i.e., the distal core 3 in this embodiment) in which the latch 7 is inserted and is offset from the second groove 91, and the lock lever 9 is partially embedded in the first groove 71, whereby the latch 7 is restrained from movement by the lock lever 9 inserted into its first groove 71. And at this time, the spring 10 is in a natural state.
The key 8 is pressed by a doctor, and the lock lever 9 moves toward the lock lever in-place structure 34. When the locking lever 9 abuts against the locking lever in-place formation 34, the locking lever 9 is in the unlocked position, the second recess 91 is aligned with the first recess 71, and the latch 7 can be moved past the second recess 91 to thereby disengage from its interposed component (i.e. the distal core 3 in this embodiment). At this time, the distal core and the proximal core are separated, i.e., the distal portion and the proximal portion of the split medical endoscope are separated. Wherein the spring 10 holds the force during the movement of the lock lever 9 from the locking position to the unlocking position.
After the pressing external force on the key 8 disappears, the external force key 8 provided by the spring piece 13 drives the lock rod 9 to move in a direction away from the lock rod positioning structure 34, and the lock rod 9 moves from the unlocking position to the locking position.
If a new distal portion is to be reinserted, the key 8 is pressed by the doctor, the lock lever 9 moves toward the lock lever positioning structure 34, and the spring 10 stores the force. When the locking bar 9 abuts against the locking bar in-place formation 34, the locking bar 9 is in the unlocked position, the latch 7 is inserted into the latch receptacle and until the latch 7 abuts against the latch in-place formation, during which the latch 7 moves past the second recess 91 to thereby engage with its inserted component (i.e. the distal core 3 in this embodiment). After that, the doctor releases the pressing, and the spring 10 drives the key 8 to drive the lock rod 9 to move along the first groove, and the second groove 91 is staggered with the first groove 71.
Thereby, the distal core 3 and the proximal core 2 are detachably connected.
To sum up, in the split medical endoscope of this embodiment, the distal core 3 and the proximal core 2 are detachably connected through the latch 7, the latch 7 is locked through the lock lever 9 to lock the connection between the distal core 3 and the proximal core 2, and the key 8 can drive the lock lever 9 to move between a locking position for preventing the latch 7 from being inserted and removed and an unlocking position for allowing the latch 7 to be inserted and removed under the action of external force. The structure is simple to operate, and only one of the distal core 3 and the proximal core 2 is required to be plugged in and pulled out while a doctor drives the key 8. Therefore, the structural design can realize one-key plug and pull, and further can realize nondestructive conduction of force, light and electricity.
Meanwhile, the mortise lock in the embodiment has high structural precision, and can ensure that the light condensing part 14 of the near side glass fiber bundle is aligned with the receiving part of the far side glass fiber bundle when the far side core body is connected with the near side core body, so that higher light guide rate is ensured.
Example two
Referring to fig. 5, the second embodiment is different from the first embodiment in the shape of the light condensing portion.
Specifically, the light condensing portion 14 of this embodiment is composed of a cylinder and a circular truncated cone connected to the cylinder, wherein one end of the cylinder far away from the circular truncated cone is used as the first end 16, the large end of the circular truncated cone is connected to the cylinder, and the small end face of the circular truncated cone is the end face of the second end 17. At this time, the diameter of the first end 16 of the light condensing part 14 (i.e., the diameter of the cylinder and the maximum diameter of the circular truncated cone) is 4-5mm, and the diameter of the second end 17 of the light condensing part 14 (i.e., the minimum diameter of the circular truncated cone) is 3-4mm. Of course, the present invention is not limited to this, and the light collecting portion 14 may be integrally formed as a circular truncated cone.
In this embodiment, the end surface of the second end 17 of the light-gathering portion 14 is flush with the outer end surface of the second metal sleeve 18, and the inner wall of the second metal sleeve 18 is matched with the shape of the light-gathering portion 14, i.e. when the light-gathering portion 14 is a cylinder and a circular table, the inner wall of the second metal sleeve 18 is a cylindrical surface and a circular table. The first mounting hole 21 is a circular hole with equal diameter, and the first metal connecting pipe 22 is a circular pipe with equal outer diameter and equal wall thickness. The outer wall of the second metal sleeve 18 is in form fit with the inner wall of the first metal connection tube 22.
When the proximal core 2 and the distal core 3 are connected, the light condensing portion 14 is coaxial with the receiving portion 41 and the second end 17 of the light condensing portion 14 abuts against the receiving portion 41. At this time, the third metal sleeve 42 and the second metal connection pipe 32 are in contact with the second metal sleeve 18, and the diameter of the receiving portion 41 is smaller than the diameter of the second end portion of the light condensing portion 14 (preferably, the difference between the diameter of the receiving portion 41 and the diameter of the second end portion of the light condensing portion 14 is an installation error), so that the second end portion 17 of the light condensing portion 14 is in contact with the receiving portion 41 and the light condensing portion 14 is coaxial with the receiving portion 41.
As in the first and second embodiments, the light-gathering portion is connected to the first mounting hole by the second metal sleeve 18 and the first metal connecting pipe, and the receiving portion is connected to the second mounting hole by the third metal sleeve 42 and the second metal connecting pipe 32, so that the first light beam 1 and the second light beam 4 are independent products and are convenient to mount and dismount from the proximal core 2 and the distal core 3.
Example III
Referring to fig. 6, this embodiment is different from the first embodiment in that the first metal connection pipe and the second metal connection pipe are removed, the second metal sleeve 18 is directly sleeved with the first mounting hole 21, the third metal sleeve 42 is directly sleeved with the second mounting hole 31, and an end of the second metal sleeve 18 near the proximal glass fiber bundle 1 is inserted into the first mounting hole 21 to abut against the second metal sleeve 18.
Preferably, this "nesting" is achieved by screwing or bonding.
Example IV
Referring to fig. 7, the present embodiment is different from the second embodiment in that the first metal connection pipe and the second metal connection pipe are removed, the second metal sleeve 18 is directly sleeved with the first mounting hole 21, and the third metal sleeve 42 is directly sleeved with the second mounting hole 31. Preferably, this "nesting" is achieved by screwing or bonding.
At this time, the outer wall of the second metal sleeve 18 is shape-fitted with the inner wall of the first mounting hole 21, and the outer wall of the third metal sleeve 42 is formed in a stepped shape with the second mounting hole 31.
The foregoing is merely exemplary of the present invention, and those skilled in the art should not be considered as limiting the invention, since modifications may be made in the specific embodiments and application scope of the invention in light of the teachings of the present invention.
Claims (7)
1. The split medical endoscope comprises a proximal core body (2), a distal core body (3), a proximal glass fiber bundle (1) and a distal glass fiber bundle (4), wherein the distal core body (3) and the proximal core body (2) are detachably connected, the proximal glass fiber bundle (1) is arranged in the proximal core body (2), the distal glass fiber bundle (4) is arranged in the distal core body (3),
the proximal glass optical fiber bundle (1) comprises a plurality of proximal glass optical fibers which are arranged in a bundle, wherein each proximal glass optical fiber comprises a light source end (11), a light guide section (12) and an emission end (13) which are sequentially connected, and the emission ends (13) of all the proximal glass optical fibers are thermally fused to form an integrated light-gathering part (14);
the distal glass fiber bundle (4) comprises a plurality of distal glass fibers, one ends of all distal glass fibers are thermally fused to form an integrated receiving part (41), the other ends of all distal glass fibers are divided into a plurality of illumination structures which respectively extend to the front end of the distal part, and before connecting the illumination structures, each distal glass fiber is also thermally fused to form an integrated emitter;
the light condensing portion (14) and the receiving portion (41) are configured to: when the distal core (3) and the proximal core (2) are connected, the light focusing part (14) focuses light transmitted from the light guide sections (12) of all the proximal glass optical fibers to the receiving part (41);
the light source ends (11) of all the near side glass optical fibers are hot-melted to form an integrated light source connecting part (15);
in the projection of a plane perpendicular to the center line of the proximal glass fiber bundle (1), the projection of the light source connection portion (15) and the light condensing portion (14) is located within the projection range of the light guiding sections (12) of all proximal glass fibers;
the light gathering part (14) comprises a first end part (16) connected with the light guide sections (12) of all the near side glass optical fibers and a second end part (17) far away from the light guide sections (12);
the light-gathering section (14) has two structures:
structure one: the light gathering part (14) comprises a round table, and the small end face of the round table forms the end face of the second end part (17);
and (2) a structure II: an end face of the second end (17) of the light-gathering part (14) is configured as a sphere;
the proximal glass fiber bundle (1) comprises a first metal sleeve, a hose and a second metal sleeve (18) which are sequentially connected, wherein the first metal sleeve wraps the light source connecting part (15), the hose wraps the light guide section (12), and the second metal sleeve (18) wraps the light gathering part (14);
a first mounting hole (21) is formed in the proximal core body (2), the second metal sleeve (18) is directly sleeved with the first mounting hole (21), or the second metal sleeve (18) is sleeved with a first metal connecting pipe (22) in the first mounting hole (21), and one end, close to the distal glass fiber bundle (4), of the second metal sleeve (18) is retracted relative to the first mounting hole (21);
the distal glass fiber bundle (4) comprises a third metal sleeve (42) wrapping the receiving part (41), and the receiving part (41) is flush with one end face of the third metal sleeve (42) close to the proximal glass fiber bundle (1);
a second mounting hole (31) is formed in the distal core body (3), the third metal sleeve (42) is directly sleeved with the second mounting hole (31), one end, close to the proximal glass fiber bundle (1), of the third metal sleeve (42) is inserted into the first mounting hole (21) to be in butt joint with the second metal sleeve (18), or the third metal sleeve (42) is sleeved with a second metal connecting pipe (32) in the second mounting hole (31), and one ends, close to the proximal glass fiber bundle (1), of the third metal sleeve (42) and the second metal connecting pipe (32) are inserted into the first mounting hole (21) to be in butt joint with the second metal sleeve (18);
when the light-condensing unit (14) includes the circular truncated cone, the light-condensing unit (14) is coaxial with the receiving unit (41), the second end (17) of the light-condensing unit (14) is abutted against the receiving unit (41), and the diameter of the receiving unit (41) is equal to or smaller than the diameter of the second end (17);
when the second end (17) of the light-collecting part (14) is configured as a sphere, the second end (17) of the light-collecting part (14) is spaced from the receiving part (41), and the diameter of the receiving part (41) is equal to or smaller than the diameter of the small end of an imaginary circumscribed cone (A) of the sphere.
2. The split medical endoscope of claim 1, wherein the split medical endoscope comprises a housing,
the light guide sections (12) of the plurality of proximal glass optical fibers are gathered to form a light guide part of the proximal glass optical fiber bundle;
the diameter of the light source connecting part (15) is 3mm-4mm, and the diameter of the light guide part is 4mm-5mm;
when the light gathering part (14) comprises a circular table, the diameter of a first end part (16) of the light gathering part (14) is 4mm-5mm, and the diameter of a second end part (17) of the light gathering part (14) is 3mm-4mm;
when the end face of the second end part (17) of the light gathering part (14) is in a spherical surface, the rest part of the light gathering part (14) except the second end part (17) is a cylinder, and the diameter of the cylinder is 3mm-4mm;
the diameter of the receiving part (41) is 3mm-4mm.
3. The split medical endoscope of claim 1, wherein the split medical endoscope comprises a housing,
the first metal sleeve is adhered to the light source connecting part (15);
the light gathering part (14) is adhered to the second metal sleeve (18);
the receiving part (41) is adhered to the third metal sleeve (42);
the sleeving is connected by threads or is bonded;
when the light-condensing unit (14) includes the circular truncated cone:
an end face of a second end part (17) of the light gathering part (14) is flush with an outer end face of the second metal sleeve (18), and an inner wall of the second metal sleeve (18) is matched with the light gathering part (14) in a shape;
under the condition that the second metal sleeve (18) is directly sleeved with the first mounting hole (21), the outer wall of the second metal sleeve (18) is matched with the inner wall of the first mounting hole (21), and the first mounting hole (21) is a circular hole with the same diameter;
when the second metal sleeve (18) is sleeved with the first metal connecting pipe (22), the first mounting hole (21) is a circular hole with the same diameter, the first metal connecting pipe (22) is a circular pipe with the same outer diameter and the same wall thickness, and the outer wall of the second metal sleeve (18) is matched with the inner wall of the first metal connecting pipe (22) in shape;
in the case that the second end (17) of the light-gathering section (14) is configured as a sphere:
the second metal sleeve (18) is a circular tube with equal outer diameter and equal wall thickness;
under the condition that the second metal sleeve (18) is directly sleeved with the first mounting hole (21), the first mounting hole (21) is a circular hole with the same diameter;
under the condition that the second metal sleeve (18) is sleeved with the first metal connecting pipe (22), the first mounting hole (21) is a circular hole with equal diameter, and the first metal connecting pipe (22) is a circular pipe with equal outer diameter and equal wall thickness;
the second mounting hole (31) is a stepped hole;
under the condition that the third metal sleeve (42) is directly sleeved with the second mounting hole (31), the outer wall of the third metal sleeve (42) is matched with the second mounting hole (31) to form a step shape;
under the condition that the second metal sleeve (18) is sleeved with the second metal connecting pipe (32), the outer wall of the second metal connecting pipe (32) is matched with the second mounting hole (31) to form a stepped shape, a stepped hole is formed in the second metal connecting pipe (32), and the outer wall of the third metal sleeve (42) is matched with the stepped hole in the second metal connecting pipe (32) to form a stepped shape.
4. The split medical endoscope according to claim 1, further comprising a latch (7), a key (8) and a lock lever (9);
one end of the bolt (7) is fixed on one of the distal core (3) and the proximal core (2), and the other end of the bolt (7) is inserted in the other of the distal core (3) and the proximal core (2) in a pluggable manner;
one end of the lock rod (9) is fixed on the key (8), and the other end of the lock rod (9) is movably inserted into a part inserted by the bolt (7);
the key (8) can drive the lock rod (9) to move between a locking position for preventing the plug pin (7) from being plugged and an unlocking position for allowing the plug pin (7) to be plugged under the action of external force.
5. The split medical endoscope of claim 4, wherein the split medical endoscope comprises a housing,
the plug direction of the plug pin (7) is perpendicular to the moving direction of the lock rod (9);
the latch (7) is provided with a first groove (71), and the lock rod (9) is provided with a second groove (91):
when the lock rod (9) is located at the locking position, the first groove (71) is located in a part inserted by the bolt (7), the first groove (71) and the second groove (91) are staggered, and the lock rod (9) is partially embedded in the first groove (71);
when the lock lever (9) is in the unlocked position, the second recess (91) is aligned with the first recess (71) and the latch (7) is movable past the second recess (91) to engage or disengage a component into which it is inserted.
6. The split medical endoscope of claim 5, wherein the split medical endoscope comprises a housing,
a bolt jack (35) is arranged in a part inserted by the bolt (7), the bottom of the bolt jack (35) forms a bolt in-place structure (33), the bolt (7) is slidably engaged with the bolt jack (35), and one end of the bolt (7) for being engaged with the bolt jack (35) is provided with a front end guide structure (72);
a lock rod jack (36) is arranged in a part inserted by the bolt (7), the extending direction of the lock rod jack (36) is perpendicular to the extending direction of the bolt jack (35), the hole bottom of the lock rod jack (36) forms a lock rod in-place structure (34), and the lock rod (9) is slidably connected with the lock rod jack (36);
-said locking lever (9) being movable between said unlocking position and said locking position when said latch (7) is in abutment with said latch-in-place structure (33);
when the lock rod (9) abuts against the lock rod in-place structure (34), the lock rod (9) is located at the unlocking position.
7. The split medical endoscope according to claim 5, further comprising a spring (10);
the spring (10) is elastically supported between the key (8) and a part inserted by the bolt (7);
when the lock rod (9) is positioned at the locking position, the spring (10) is in a natural state;
-said spring (10) accumulating force during the movement of said locking lever (9) from said locking position to said unlocking position;
the other end of the bolt (7) is configured as a cylinder with an annular first groove (71);
the second groove (91) is an arc-shaped groove, and the radius of the arc-shaped groove is larger than that of the cylinder with the annular first groove (71).
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| CN202010210464.0A CN113440090B (en) | 2020-03-24 | 2020-03-24 | Split medical endoscope |
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