CN110916601A - Variable illumination structure and endoscope - Google Patents
Variable illumination structure and endoscope Download PDFInfo
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- CN110916601A CN110916601A CN201910844247.4A CN201910844247A CN110916601A CN 110916601 A CN110916601 A CN 110916601A CN 201910844247 A CN201910844247 A CN 201910844247A CN 110916601 A CN110916601 A CN 110916601A
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- illumination
- light source
- light field
- transmission part
- variable
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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
- A61B1/0661—Endoscope light sources
- A61B1/0684—Endoscope light sources using light emitting diodes [LED]
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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
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
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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
- A61B1/273—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 for the upper alimentary canal, e.g. oesophagoscopes, gastroscopes
Abstract
The invention discloses a variable illumination structure and an endoscope, and the scheme is formed by matching an illumination part, a transmission part and a light field adjusting part, wherein the illumination part can be movably arranged; the transmission part is connected with the illumination part in a driving way and can drive the illumination part to move; the light field adjusting part is in driving connection with the transmission part; the light field adjusting part adjusts and controls the moving stroke of the transmission part, the transmission part drives the illumination part to move, and then the illumination light field area generated by the illumination part is adjusted. The variable illumination structure for the endoscope can realize the adjustment of the direction and the illumination range of an illumination light field, so that an operator can adjust the illumination light window according to the actual operation condition, and the problems that the non-overlapped part is not illuminated in the operation process and the imaging is not clear only by diffuse reflection illumination because the illumination light window and the image view field are not completely overlapped in the existing endoscope are effectively solved.
Description
Technical Field
The present invention relates to an endoscope, and more particularly, to a technique for illuminating a distal end portion of an endoscope.
Background
In recent years, endoscopes have come to be widely used in the medical field. In some endoscopes used in the medical field, a treatment instrument insertion channel through which a treatment instrument can be inserted is provided so that treatment such as treatment can be performed by the treatment instrument. For example, a side-view endoscope used for ERCP (Endoscopic retrogradio-pancreatograpy) or the like has a treatment instrument lift table for changing a projecting direction of a treatment instrument at a distal end portion.
Such side-looking endoscopes, which have particular requirements for the illumination light field to match the image field of view on the side-looking endoscope, are significantly different from ordinary forward-looking endoscopes.
However, in practical application of the illumination structure of the existing side-looking endoscope, the generated illumination light field and the image field of view are not completely overlapped, which results in that the non-overlapped part in the operation process can only rely on diffuse reflection illumination, and the imaging is not clear.
Disclosure of Invention
Aiming at the problems of the illumination structure on the existing side-viewing endoscope, an illumination scheme for the side-viewing endoscope with an adjustable illumination light field is needed.
Therefore, the present invention aims to provide a variable illumination structure and an endoscope, which can adjust an illumination light field for different application scenes after installation.
In order to achieve the above object, the present invention provides a variable illumination structure, comprising:
an illuminating part movably provided;
the transmission part is in driving connection with the illumination part and can drive the illumination part to move;
the light field adjusting part is in driving connection with the transmission part; the light field adjusting part adjusts and controls the moving stroke of the transmission part, the transmission part drives the illumination part to move, and then the illumination light field area generated by the illumination part is adjusted.
Furthermore, the transmission part can drive the light source in the illumination part to rotate by taking the central line of the angle of field of the illumination light generated by the illumination part as an axis.
Further, illumination portion includes light source and supporting seat, the light source is settled in the supporting seat, but the setting of supporting seat rotation, be provided with coupling assembling on the supporting seat, coupling assembling is connected with transmission portion to carry out the rotation under the drive that transmission portion connects.
Further, still include a resilient member in the illumination part, resilient member is connected with the coupling assembling on the supporting seat, resilient member is in when the supporting seat is driven the rotation by transmission part, will take place elastic deformation, form the restoring force opposite with the rotation direction to the supporting seat.
Furthermore, the transmission part can drive the light source in the illumination part to swing.
Further, the illumination part comprises a light source and a support seat, the support seat comprises a first support unit and a second support unit, the first support unit is connected with the light source, and the second support unit can be rotatably arranged and is respectively connected with the first support unit and the transmission part; the second supporting unit can rotate under the drive of the connection of the transmission part and drive the first supporting unit to swing, and then the light source is driven to swing.
Further, still include second elastomeric element in the illuminating part, elastomeric element with the supporting seat cooperation sets up, elastomeric element is in when the supporting seat drives the light source and swings, will take place elastic deformation, form the restoring force opposite with the swing direction to the supporting seat.
Further, the transmission part is of a flexible structure.
Furthermore, the light field adjusting part comprises a magnetic movable block and an electromagnet, the movable block is connected with the transmission part, and the electromagnet is arranged relative to the movable block and can generate magnetic force under the action of current so as to drive the movable block to move.
In order to achieve the above object, the present invention provides an endoscope comprising an insertion portion and an operation portion, wherein the above variable illumination structure is further provided in the endoscope, wherein an illumination portion housing cavity and a conduction portion insertion channel are provided at a distal end portion of the insertion portion, and an illumination portion in the variable illumination structure is provided in the illumination portion housing cavity.
The variable illumination structure provided by the invention can realize the adjustment of the direction and the illumination range of the illumination light field, so that an operator can adjust the illumination light window according to the actual operation condition, and the problems that the non-overlapped part is not illuminated in the operation process and the imaging is not clear only by diffuse reflection illumination because the illumination light window and the image view field are not completely overlapped in the existing endoscope are effectively solved.
In addition, the variable illumination structure provided by the invention has a compact overall structure and stable and reliable performance, and the scheme can realize the adjustment of the direction and the illumination range of the illumination light field in the compact structural layout of the endoscope operation part without changing the overall structure of the endoscope operation part or increasing the illumination light source or the illumination power, so that the endoscope can change the illumination position according to the operation habit or the actual requirement of an operator.
Drawings
The invention is further described below in conjunction with the appended drawings and the detailed description.
FIG. 1 is a schematic view showing a configuration of a distal end portion of an insertion portion of a side-view endoscope in example 1 of the present invention;
FIG. 2 is a cross-sectional view of the distal end portion of the insertion portion of the side-viewing endoscope in example 1 of the present invention;
FIG. 3 is an assembled view of the illuminating section and the front end section in example 1 of the present invention;
FIG. 4 is a schematic view showing the structure of an illuminating section in example 1 of the present invention;
FIG. 5 is a schematic view of an illumination light field in example 1 of the present invention;
FIG. 6 is a schematic view showing the structure of a light field adjusting section (traction state) in example 1 of the present invention;
FIG. 7 is a schematic view showing the structure of a light field adjusting section (released state) in example 1 of the present invention;
FIG. 8 is a schematic diagram showing a variation of the illumination light field adjustment in example 1 of the present invention;
FIG. 9 is a schematic diagram showing a normal structure of a lighting unit in example 2 of the present invention;
FIG. 10 is a schematic view showing a structure of a stretched state of an illuminating part in example 2 of the present invention;
FIG. 11 is a diagram illustrating the range of the illuminating light field along the insertion direction X under normal conditions in example 2 of the present invention;
FIG. 12 is a schematic view of the field range of the illumination light normally along the vertical insertion direction Y in example 2 of the present invention;
FIG. 13 is a schematic view of the range of the illumination field along the insertion direction X after adjustment in example 2 of the present invention;
fig. 14 is a diagram showing the range of the illumination light field along the vertical insertion direction Y after adjustment in example 2 of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
The example takes a duodenoscope as an example, and as one type of side-viewing endoscope, the existing duodenoscope has the problem of unclear imaging caused by incomplete overlapping of an illumination light field and an image view field in the actual use process.
The inventor discovers that if the illumination light field can be changed by analyzing the constitution scheme of the side-looking endoscope, the overlapped part of the illumination light field and the image view field can be effectively enlarged on the premise of not increasing the illumination light source or the illumination power, thereby improving the problem of unclear imaging.
Accordingly, an illumination structure for a side-view endoscope capable of changing an illumination light field has been proposed through a large number of innovative studies. The illumination structure can realize the adjustment of the direction of an illumination light field and the illumination range of the side-looking endoscope.
The implementation process of the scheme is illustrated by specific application examples.
Example one
The endoscope described in this example is configured as a side-viewing endoscope (such as a duodenoscope) and has an insertion portion and an operation portion as an integral structure. A universal cable is connected to the operation portion in an extending manner, and the universal cable is connected with external equipment (such as a light source device and an image processor) through a connector, and finally an image is displayed on the display; and has a distal end portion, a curved portion and a flexible tube portion at the insertion portion. The specific construction scheme of the part is well known to those skilled in the art and will not be described herein.
The present example realizes that the illumination light field of the endoscope is adjustable by providing an adjustable illumination structure at the front end portion of the insertion portion of the side-looking endoscope.
The adjustable illuminating structure mainly comprises an illuminating part, a transmission part and a light field adjusting part which are matched, wherein the illuminating part is movably arranged at the front end part of the endoscope; the transmission part is connected with the illumination part and drives the illumination part to move in the front end part of the endoscope through displacement; the light field adjusting part is connected with the transmission part in a driving mode, the light field adjusting part adjusts and controls the moving stroke of the transmission part, the transmission part drives the illuminating part to move, and then the illuminating light field area generated by the illuminating part is adjusted.
Referring to fig. 1, there is shown a schematic view of the structure of the distal end portion of the insertion portion of the side-viewing endoscope relating to the present example. As can be seen, the distal end portion 10 is provided with a channel opening and an observation opening. The treatment instrument lifting table 20 is disposed at the channel opening portion, and the illumination portion 30 and the observation portion 40 are disposed at the observation opening portion, the illumination portion 30 irradiates illumination light toward the test site, and the observation portion 40 is used for observing the test site. In this example, the illumination hole 11 and the observation hole 12 are provided in the observation opening portion of the distal end portion 10 so as to be engaged with the illumination portion 30 and the observation portion 40, respectively.
Referring to fig. 2 and 3, in order to be able to effectively arrange the respective illumination portions 30 within the observation opening portion of the front end portion 10, the present example is provided with an illumination portion housing cavity 50 and a conduction portion through channel 70 in the front end portion 10 of the insertion portion, the illumination portion housing cavity 50 may be provided in the front end portion 10 of the insertion portion with respect to the illumination hole 11 on the front end portion 10 for seating the respective illumination portions 30; the conduction part through channel 70 is communicated with the illumination part accommodating cavity 50 and is used for arranging the conduction part 60 for driving the illumination part 30; while a corresponding light window 13 is provided on the illumination aperture 11 on the front end portion 10 for sealing the illumination portion 30.
With the illumination section accommodating chamber 50 in this example, the overall shape thereof is substantially rectangular, and the illumination section 30 can be inserted into the endoscope head end as a whole, and after the insertion of the endoscope head end, it can be fixed by adhesive sealing, so as to ensure the stability and reliability of the entire structure.
The illumination portion 30 is movably disposed in the illumination portion accommodating chamber 50 as a whole to form an effective illumination light field to the outside through the light window 13 at the top end of the illumination portion accommodating chamber 50.
Referring to fig. 4, the lighting portion 30 in this embodiment is mainly formed by the LED light source 31, the support base 32 and the elastic member 33.
The LED light source 31 is used for generating illumination light, and mainly includes an LED lamp bead and a wire for supplying power.
In this example, in order to save space, the wires of the LED light source 31 are arranged along the surface of the support base 32 and extend from the insertion portion. Preferably, the conductive portion and the conductive wire share a channel so as not to cause the diameter of the insertion portion to be increased.
The configuration of the LED light source 31 may be determined according to actual requirements, as long as the indexes such as size, heat dissipation performance, and light intensity meet the requirements, which is not described herein again.
The support base 32 is used for supporting and placing the LED light source 31, the support base 32 is rotatably connected to both sidewalls of the illumination portion accommodating chamber 50 by the rotation shaft 34, while the top of the support base 32 is used for placing the LED light source 31 and the bottom is connected to the conductive portion 60. So, the whole revolving shaft 34 that revolutes in illumination portion holds chamber 50 of supporting seat 32, makes a round trip to drive the bottom of supporting seat 32 by conduction portion 60 like this for supporting seat 32 is whole to be swung repeatedly around revolving shaft 34 in illumination portion holds chamber 50, makes supporting seat 32 top drive LED light source 31 carry out the swing back and forth then, realizes the adjustment to LED light source 31 direction of illumination and scope.
As shown in fig. 2 and 4, the shape of the support base 32 in this example may be set according to actual requirements to avoid increasing the size of the illumination portion accommodation chamber. As shown in fig. 4, the support seat 32 in this example is composed of two parts: a first support seat 32a and a second support seat 32 b.
Here, the first support seat 32a serves as the top end of the support seat 32 for supporting the LED light source 31, and the second support seat 32b serves as the bottom end of the support seat 32 and is connected to the conductive part 60; and fixed connection between first supporting seat 32a and the second supporting seat 32b, be provided with corresponding pivot 34 in the junction between first supporting seat 32a and the second supporting seat 32b simultaneously for be connected with illumination portion holds chamber 50, realize like this can rotate and drive first supporting seat 32a swing under the traction, drive LED light source 31 swing then, thereby realize adjusting the illumination light field.
Further, the first support base 32a is preferably formed in a tapered shape, and a large end thereof is used for fixing the LED light source 31, and a small end thereof is used for connecting the second support base 32b, so that space can be saved and the first support base 32a can be conveniently swung in the illumination portion accommodating cavity as a whole.
On the basis of the above scheme, this example further sets up elastomeric element 33 in illumination portion holds chamber 50, and this elastomeric element 33 specifically sets up with supporting seat 32 cooperation to when supporting seat 32 drove LED light source 31 and swings, take place elastic deformation in step, thereby form the restoring force opposite with the swing direction to supporting seat 32, when the supporting seat loses the traction force of conduction portion 60 like this, will drive supporting seat 32 and drive LED light source 31 and return the swing, restore to the original state.
Here, one end of the elastic member 33 is connected to the inner wall of the illumination portion accommodating chamber 50 in a fitting manner, and the other end is connected to the support base 32 disposed in the illumination portion accommodating chamber 50, for resetting the swing state of the support base 32.
The elastic member 33 in this example is preferably a V-shaped spring or a V-shaped leaf spring, or the like, of the elastic member 33, with respect to the fitting structure between the support base 32 and the illumination portion accommodating chamber 50.
The elastic member 33 having such a structure can be fitted with the space between the support base 32 and the side wall of the illumination portion accommodating chamber 50 based on the V-shaped structure thereof, so that one end surface of the V-shaped elastic member 33 is connected and fitted with the surface of the support base 32, and the other end surface is connected and fitted with the side wall of the illumination portion accommodating chamber 50.
When the illumination portion 30 installed and arranged in this way is matched with the traction transmission portion 60, the traction transmission portion 60 generates traction force on the second supporting seat 32b of the supporting seat 32 through movement, so that the second supporting seat 32b rotates around the rotating shaft 34, the first supporting seat 32a connected with the second supporting seat is driven to swing, and then the LED light source 31 is driven to swing, so that the illumination light field is adjusted.
The process of driving the support seat 32 to swing by the lower traction transmission part 60 will be described by taking the structure and arrangement orientation shown in fig. 2 and 4 as an example.
As can be seen first, the traction drive 60 is arranged vertically and is movable in the vertical direction with respect to the lighting unit accommodation chamber 50, the top end of which is in driving connection with the rear end (bottom end) of the support base 32.
Thus, when the traction transmission portion 60 moves downward in the vertical direction, the second supporting seat 32b on the supporting seat 32 is driven to rotate around the rotating shaft 34 toward the lower portion of the accommodating cavity 50 for the illumination portion (i.e., downward in the direction shown in the figure), and then the first supporting seat 32a on the supporting seat 32 is driven to rotate toward the upper portion of the accommodating cavity 50 for the illumination portion (i.e., upward in the direction shown in the figure), so that the first supporting seat 32a drives the LED light source 31 thereon to swing, thereby realizing adjustment of the illumination light field.
During the swing, the second support seat 32b on the support seat 32 will synchronously compress the elastic member 33, so that the elastic member 33 generates a restoring elastic force. Thus, after the transmission part 60 is released, the second support seat 32b loses traction, and the second support seat 32b returns to the original position under the reaction of the elastic force of the elastic part 33 (so that the second support seat 32b rotates around the rotating shaft 34 to face the upper part of the lighting part accommodating cavity 50), thereby driving the LED light source 31 to return to the original position.
Referring to fig. 5, there is shown a schematic view of an illumination field and an observation field formed at an observation opening portion of the distal end portion 10 based on the cooperation of the illumination portion 30 and the observation portion 40 given in this example.
With further reference to fig. 1, 2, 3 and 5, the observation portion 40 in this example embodiment is fixedly disposed in the front end portion 10, which forms a fixed observation field 14 through the observation hole 12 in the front end portion 10; meanwhile, the illumination part 30 is movably arranged in the front end part 10, the LED light source 31 at the front end can swing relative to the illumination hole 11 on the end part 10, when the LED light source 31 is in a normal state, the LED light source forms an illumination light field 16 (namely, a solid line state) through the illumination hole 11 and the light window 13 on the illumination hole, and at the moment, the illumination light field 16 is deviated to the end part of the endoscope head, thereby being beneficial to the insertion action of the endoscope in the body; when the LED light source 31 is driven to swing (as described above in the driving process), the LED light source 31 swings downward, and the illumination hole 11 and the light window 13 thereon form the illumination light field 15 (i.e., in a dotted line state), and at this time, the illumination light field 15 deviates from the front of the endoscope head end and deviates to the observation hole 12, and the overlapping range with the field of view becomes large, which is beneficial to the endoscopic diagnosis and treatment operation.
In the embodiment of the present invention, a state in which the illumination light field of the LED light source is deviated from the end portion of the endoscope head is defined as a normal state, and a state in which the illumination light field of the LED light source is deviated from the end portion of the endoscope head may be defined as a normal state.
In the illumination section 30 configured as described above, in order to stably and reliably draw the support seat 32 in the illumination section 30, the drawing transmission section 60 in this example serves as a driving member, and is inserted into the conduction section passage 70 in the distal end portion 10, and one end thereof is connected to the trailing end of the second support seat 32b of the support seat 32, and the other end thereof is connected to the light field adjusting section 80. This causes displacement by the driving of the light field adjusting unit 80, and then, the lighting unit 30 is pulled to swing the lighting unit 30, thereby adjusting the lighting field.
The transmission section 60 is preferably a traction wire such as a wire rope in order to adapt to a particular structure of the endoscope. The transmission section 60 thus constructed is flexible as a whole, has a compact structure, and is suitable for the flexible characteristics of a flexible endoscope.
The light field adjusting portion 80 in this example serves as a power adjusting member of the entire illumination structure to adjust the moving stroke of the transmission portion 60.
For the convenience of operation, the light field adjusting portion 80 may be provided on the operation portion of the endoscope here, and drive-connects the transmission portion 60.
Referring to fig. 6, a diagram illustrating a structure of the optical field adjusting part 80 in this example is shown.
As can be seen from the figure, the optical field adjusting portion 80 in the present embodiment mainly includes an electromagnet 81 and a movable block 82, which are mutually engaged, and the electromagnet 81 and the movable block 82 are mutually engaged and accommodated in a frame 83.
The movable block 82 is movably disposed in the frame 83, and has one end provided with magnetism and the other end connected to the transmission portion 60 (e.g., a wire rope). The specific configuration of the movable block 82 is not limited herein, as long as it can move within the frame 83 by a certain distance due to the magnetic force.
The electromagnet 81 is positioned within the frame 83 relative to the movable block 82 and is externally connected to a power source to generate a magnetic force facing the magnetic segment of the movable block 82 and thereby drive the movable block 82 to move within the frame 83. Therefore, by changing the direction of the current connected into the electromagnet 81 and then changing the direction of the magnetic force generated by the movable block 82, the movable block 82 can be driven to move in the frame 83, and the transmission part 60 is driven to move.
According to the scheme, the illuminating structure for illuminating the light field is formed in the front end part of the insertion part of the side-looking endoscope, and the whole scheme does not need to change the main structure of the front end part and does not increase an illuminating light source or illuminating power.
The following description will be made by referring to fig. 6 to 8 and the above-mentioned arrangement of the light field adjusting unit 80, the motion transmitting unit 60 and the illumination unit 30 to illustrate the implementation of the illumination light field adjustment according to the present embodiment.
Referring to fig. 6 and 8, the present example provides a scheme that, in a normal state, a positive current is supplied to the electromagnet 81 of the light field adjusting portion 80, the electromagnet 81 generates a magnetic force, and the magnetic force is different from the magnetic force generated on the movable block 82, and then attracts the movable block 82, so that the movable block 82 moves toward the electromagnet 81 in the frame 83, and then forms a traction to the transmission portion 60 (as shown in fig. 6).
At this time, the driving unit 60 is moved by the pulling of the movable block 82, and then the support base 32 of the illumination unit 30 is pulled to swing (as described above), so that the LED light source 31 supported by the support base moves toward the endoscope head.
Since the observation field α formed on the distal end portion 10 is fixed, as shown in fig. 8, the illuminated field range is α 1 formed along the vertical insertion direction Y, and the illuminated field is shifted forward, which facilitates insertion movement in the human body, and the overlapping range of the illuminated field and the field is θ 1.
When inserted to a particular position, the direction of the current to the electromagnet 81 can be changed and the electromagnet 81 will generate a magnetic force in the opposite direction, which is the same as the magnetic force generated on the movable block 82, which in turn repels the movable block 82, causing the movable block 82 to move within the frame 83 in a direction that releases the movable block 82, which in turn pulls the transmission 60 in the opposite direction (as shown in fig. 7).
At this time, the support base 32 of the illumination unit 30 is driven by the traction transmission unit 60 to swing in a direction to deflect the observation unit, and at this time, as shown in fig. 8, an illumination light field range of α 2 is formed in the vertical insertion direction Y, and an overlapping portion θ 2 of the light field and the field of view is increased, thereby improving the imaging quality.
The insertion direction is the moving direction in the cavity of the human body, and the emphasis should be placed on illuminating the area in front of the cavity; during diagnosis and treatment, the view field direction and the light field direction are required to be superposed as much as possible, so that the image is not dark.
It should be noted that, here, it is exemplified that the electromagnet attracts the movable block in the normal state and repels the movable block in the diagnosis and treatment, but the present solution is not limited to this, and if necessary, the electromagnet repels the movable block in the normal state and attracts the movable block in the diagnosis and treatment.
Known from the above example, in the side-looking endoscope scheme formed by the above method, the illumination light field is adjustable, so that the imaging quality can be improved, different control modes can be provided, and an operator can conveniently switch the illumination mode according to different scenes.
Example two
Compared with the first embodiment, the moving mode and the structure of the illumination part are different, and the rest structures are the same, and the description of the same parts is omitted.
Referring to fig. 9 and 10, the illumination portion 90 in this example is mainly formed by the LED light source 91, the support base 92, the elastic member 93, and the rotation shaft 94 in cooperation with each other.
Specifically, in the present embodiment, a corresponding rotating shaft 94 is provided in the lighting portion accommodating chamber (see the lighting portion accommodating chamber 50 in fig. 3), and the supporting base 92 is integrally sleeved on the rotating shaft 94 and can rotate in the lighting portion accommodating chamber along the rotating shaft under the action of force.
The end surface of the top end of the support base 92 is used for arranging the LED light source 91, and the bottom end is used for connecting the conduction part 60. The support base 92 in this example is preferably generally conical in shape to facilitate rotation within the lighting portion receiving cavity.
Further, in this embodiment, an upper lug 95 and a lower lug 96 are symmetrically disposed at the bottom end of the support base 92, and the lower lug 96 on the support base 92 is connected to the conduction portion 60, so that the support base 92 is driven to rotate around the rotation shaft 94 under the action of the conduction portion 6 to adjust the illumination light field.
Further, the upper lug 95 of the support base 92 is connected to one end of the elastic member 93, and the other end of the elastic member 93 is connected to the illumination section accommodating chamber (not shown). Therefore, the elastic component 93 can be deformed synchronously when the transmission part 60 drives the support seat 92 to rotate around the rotating shaft 94, so that the restoring force opposite to the rotating direction is formed on the support seat 92, and the support seat 92 is driven to drive the LED light source 91 to rotate reversely to restore to the original state when the traction force of the transmission part 60 is lost.
In this example, the elastic member 93 is preferably a spring, one end of which is connected to the upper lug 95 of the support base 92, and the other end of which is connected to the illumination portion accommodation chamber along the circumferential direction of the support base 92.
In addition, in order to effectively realize that the LED light source 91 adjusts the illumination light field through rotation, the LED light source 91 here adopts a non-centrosymmetric structure, such as an irregular shape, and the illustrated embodiment adopts a rectangular structure of the LED light source 91. The LED light source 91 with such a structure is arranged on the end surface of the top end of the support base 92, and when rotating around the rotating shaft 94 along with the support base 92, different illumination light field ranges are generated in the same direction, and the illumination light field can be adjusted by matching with the rotation of the support base 92.
The illumination part 90 arranged in this way is integrally rotatably arranged in the illumination part accommodating cavity, and the LED light source 91 arranged on the illumination part is driven to rotate relative to the illumination part accommodating cavity through rotation of the illumination part 90, so that the illumination light field is adjusted.
The basic process of the illumination portion 90 for adjusting the illumination field by rotation in this example is described below with reference to fig. 9 and 10.
Referring to fig. 9, in the normal state of the lighting unit 90, the conductive unit 60 and the elastic member 93 are both in a relaxed state, and the LED light sources 91 on the top end surface of the support base 92 are distributed in a horizontal state (orientation shown in the figure).
Referring to fig. 10, when the conducting portion 60 pulls the lower lug 96 on the supporting base 92, the conducting portion 60 is stretched downward and drives the supporting base 92 to rotate counterclockwise around the rotating shaft 94, and then drives the LED light source 91 to rotate counterclockwise, so that the LED light sources 91 are distributed in a vertical state (shown in the figure); the upper lug 95 of the support base 92 on rotation will compress the resilient member 93 so that the resilient member 93 is in compression. When the conductive part 60 releases the traction of the support 92, the elastic member 93 drives the support 92 to rotate clockwise about the rotation shaft 94 by the generated elastic force, and the recovery is realized.
Since the distribution of the LED light sources 91 changes during the rotation of the supporting base 92, the generated illumination field will also change.
The following illustrates the process of illumination field adjustment by the present example scheme.
In a normal state, a reverse current is supplied to the electromagnet of the light field adjusting part (same as the example 1), the electromagnet repels the movable block, the movable block moves in the frame along the direction of releasing the transmission part, and the transmission part drives the supporting seat of the illumination part to drive the LED light source to rotate anticlockwise.
Referring to fig. 11 and 12, the illuminated light field now has a range of β along the insertion direction X1(as shown in FIG. 11), the illuminated light field along the perpendicular insertion direction Y has a range of β2(as shown in FIG. 12), β1>β2The whole light field is favorable for the insertion movement in the human body, and the overlapping range of the illumination light field range and the view field range is theta3。
When the LED light source is inserted into a specific position, the current direction of the electromagnet is changed, the electromagnet attracts the movable block, the movable block moves in the frame along the direction of the traction transmission part, and the support seat of the illumination part is pulled, so that the support seat drives the LED light source to rotate clockwise.
Referring to fig. 13 and 14, at this time, the illuminated light field range along the insertion direction X is β 3 (as shown in fig. 13), the illuminated light field range along the perpendicular insertion direction Y is β 4 (as shown in fig. 14), β 4> β 3, and the overlapping portion θ 4 of the field of view γ and the illuminated light field is increased, thereby improving the imaging quality.
Finally, the structure described in this example, in which the spring is connected to the upper lug and the lower lug is connected to the conductive portion, is not limited to this. For example, a tension spring may be used, and both ends of the tension spring are respectively connected to one side of the upper lug and the illumination portion accommodating chamber, and the other side of the upper lug is connected to the conduction portion.
In addition, in this embodiment, it is illustrated that the electromagnet attracts the movable block in a normal state, and repels the movable block in diagnosis and treatment, and the embodiment is not limited thereto. In addition, in the present embodiment, the direction of the current is switched to change the traction direction, which is not limited in the present invention, and the current may be switched on or off.
Known from the above example, in the side-looking endoscope scheme formed by the above method, the illumination light field is adjustable, so that the imaging quality can be improved, different control modes can be provided, and an operator can conveniently switch the illumination mode according to different scenes.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. Variable illumination structure, characterized by comprising:
an illuminating part movably provided;
the transmission part is in driving connection with the illumination part and can drive the illumination part to move;
the light field adjusting part is in driving connection with the transmission part; the light field adjusting part adjusts and controls the moving stroke of the transmission part, the transmission part drives the illumination part to move, and then the illumination light field area generated by the illumination part is adjusted.
2. The variable illumination structure of claim 1, wherein the transmission part can drive the light source in the illumination part to rotate around a central line of an angle of field of the illumination light generated by the illumination part.
3. The variable lighting structure according to claim 2, wherein the lighting part comprises a light source and a support base, the light source is arranged in the support base, the support base is rotatably arranged, and the support base is provided with a connecting component, the connecting component is connected with the transmission part and rotates under the driving of the connection of the transmission part.
4. The variable lighting structure according to claim 3, further comprising a first elastic member connected to the connecting member of the supporting base, wherein the elastic member is elastically deformed when the supporting base is driven by the driving portion to rotate, so as to generate a restoring force opposite to the rotation direction of the supporting base.
5. The variable lighting structure according to claim 1, wherein the transmission part can drive the light source in the lighting part to swing.
6. The variable lighting structure according to claim 5, wherein the lighting part comprises a light source and a support base, the support base comprises a first support unit and a second support unit, the first support unit is connected with the light source, the second support unit is rotatably arranged and is respectively connected with the first support unit and the transmission part; the second supporting unit can rotate under the drive of the connection of the transmission part and drive the first supporting unit to swing, and then the light source is driven to swing.
7. The variable illumination structure of claim 6, further comprising a second elastic member, wherein the second elastic member is disposed in cooperation with the supporting base, and the elastic member is elastically deformed when the supporting base drives the light source to swing, so as to form a restoring force opposite to the swinging direction for the supporting base.
8. The variable lighting structure of claim 1, wherein the transmission portion is a flexible structure.
9. The variable lighting structure according to claim 1, wherein the light field adjusting portion comprises a movable block having magnetism and an electromagnet, the movable block is connected to the transmission portion, and the electromagnet is disposed relative to the movable block and generates a magnetic force under the action of an electric current to drive the movable block to move.
10. An endoscope having an insertion portion and an operation portion, wherein the endoscope is further provided therein with the variable illumination structure according to any one of claims 1 to 9, wherein a distal end portion of the insertion portion is provided with an illumination portion accommodation chamber in which an illumination portion in the variable illumination structure is provided, and a conduction portion penetration channel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910844247.4A CN110916601A (en) | 2019-09-06 | 2019-09-06 | Variable illumination structure and endoscope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910844247.4A CN110916601A (en) | 2019-09-06 | 2019-09-06 | Variable illumination structure and endoscope |
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| CN110916601A true CN110916601A (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910844247.4A Pending CN110916601A (en) | 2019-09-06 | 2019-09-06 | Variable illumination structure and endoscope |
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