Insertion part for endoscope and endoscope

Abstract

The utility model relates to an insertion part for an endoscope and the endoscope, which can effectively reduce the size of the insertion part, improve the discomfort of a patient in the use process and reduce the risk of invasive injury to the patient. The insertion part for the endoscope comprises an insertion part main body which is provided with an illumination imaging channel and an instrument channel which are mutually independent; the optical module is arranged in the illumination imaging channel, and the optical module comprises a lens group, a partial reflection and transmission element, an area light source and an image sensor; the lens group is arranged close to the far end of the illumination imaging channel, the partial reflection and transmission element is located on the image side of the lens group, and the area light source and the image sensor are symmetrically distributed relative to the partial reflection and transmission element, so that the area light source, the partial reflection and transmission element and the lens group jointly form an illumination system. And an imaging system is formed by the lens group, the partial reflection and transmission element and the image sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to an insertion part for an endoscope and an endoscope. Background Art

[0002] In recent years, cancer has become the leading cause of death in humans, and the earlier tumor cells are discovered, the more effective the cure for cancer will be. Currently, the main way to detect tumors is to use laparoscopic, thoracoscopy and other endoscopic images to explore suspicious areas, and to confirm them with in vitro biopsy.

[0003] In addition to the imaging channel 11P and the instrument channel 12P, the insertion portion 10P in the existing endoscope usually needs to be provided with two or even three lighting channels 13P for passing the lighting fiber bundle and the homogenizing mirror group to meet the illumination intensity and uniformity requirements. Therefore, the distal end size of the existing insertion portion 10P is relatively large, that is, the distal end diameter cannot be less than 2.8 mm, which not only greatly increases the discomfort of the patient during use, but also easily causes invasive damage to the patient. Utility Model Content

[0004] One advantage of the utility model is that it provides an insertion portion for an endoscope and an endoscope, which can effectively reduce the distal end size of the insertion portion, improve the discomfort of the patient during use, and reduce the risk of invasive damage to the patient.

[0005] Another advantage of the present invention is that it provides an insertion portion for an endoscope and an endoscope. In one embodiment of the present invention, the insertion portion for an endoscope can save the space originally occupied by the lighting channel through a common optical path design for lighting and imaging, thereby facilitating the reduction of the outer diameter of the entire insertion portion.

[0006] Another advantage of the present invention is that it provides an insertion portion for an endoscope and an endoscope, wherein, in one embodiment of the present invention, the insertion portion for the endoscope can symmetrically distribute the surface light source and the image sensor relative to a portion of the reflective element to achieve a common optical path design for the imaging optical path and the illumination optical path, which can not only reduce the distal size of the insertion portion, but also effectively reduce the cost, thereby meeting the needs of disposable endoscopes.

[0007] Another advantage of the present invention is to provide an endoscope insertion portion and an endoscope, wherein in order to achieve the above-mentioned purpose, no expensive materials or complicated structures are required in the present invention. Therefore, the present invention successfully and effectively provides a solution, not only providing a simple endoscope insertion portion and an endoscope, but also increasing the practicality and reliability of the endoscope insertion portion and the endoscope.

[0008] In order to achieve at least one of the above advantages or other advantages and purposes of the present invention, the present invention provides an insertion portion for an endoscope, comprising:

[0009] An insertion portion body having an illumination imaging channel and an instrument channel that are independent of each other; and

[0010] An optical module, wherein the optical module is arranged within the illumination imaging channel, and the optical module comprises a lens group, a partial reflective element, a surface light source and an image sensor; the lens group is arranged adjacent to the far end of the illumination imaging channel, the partial reflective element is located on the image side of the lens group, the surface light source and the image sensor are symmetrically distributed relative to the partial reflective element, so that the surface light source, the partial reflective element and the lens group together constitute an illumination system, and the lens group, the partial reflective element and the image sensor together constitute an imaging system.

[0011] According to one embodiment of the present application, the partially reflective element is a semi-reflective and semi-mirror element.

[0012] According to one embodiment of the present application, the semi-reflective and semi-transmissive mirror has a first optical surface facing the lens group, a second optical surface facing the surface light source, and a third optical surface facing the image sensor.

[0013] According to an embodiment of the present application, the first optical surface is arranged opposite to the second optical surface; or the first optical surface is arranged opposite to the third optical surface.

[0014] According to one embodiment of the present application, the semi-reflective and semi-transparent mirror includes a first right-angle prism, a second right-angle prism, and a semi-reflective and semi-transparent film glued between the inclined surfaces of the first right-angle prism and the second right-angle prism.

[0015] According to an embodiment of the present application, the surface light source is a surface array light source formed by an array of multiple LED lamp beads.

[0016] According to one embodiment of the present application, the insertion portion for the endoscope further includes an electric wire extending along the lighting and imaging channel, the distal end of the electric wire is electrically connected to the surface light source, and the proximal end of the electric wire extends out of the lighting and imaging channel for electrical connection to an external power source.

[0017] According to one embodiment of the present application, the image sensor is a CCD chip.

[0018] According to one embodiment of the present application, the insertion portion for the endoscope further includes a signal line extending along the illumination and imaging channel, the distal end of the signal line is communicatively connected to the image sensor, and the proximal end of the signal line extends out of the illumination and imaging channel for being communicatively connected to an external display.

[0019] According to another aspect of the present application, the present application further provides an endoscope, comprising:

[0020] Operations; and

[0021] The endoscope insertion portion described in any one of the above, wherein the proximal end of the endoscope insertion portion is connected to the operating portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the distal end surface of the insertion portion of a conventional endoscope;

[0023] Figure 2 A schematic structural diagram of an endoscope according to an embodiment of the utility model;

[0024] Figure 3 A schematic structural diagram of a distal end surface of an endoscope insertion portion in an endoscope according to the above embodiment of the utility model is shown;

[0025] Figure 4 Shows Figure 2 An enlarged schematic diagram of a part A in the endoscope is shown;

[0026] Figure 5 A schematic diagram of the principle of an optical module in an insertion portion for an endoscope according to the above embodiment of the utility model is shown.

[0027] Explanation of the main component symbols: 1. Endoscope; 10. Insertion part for endoscope; 11. Insertion part body; 111. Illumination imaging channel; 112. Instrument channel; 12. Optical module; 121. Lens group; 122. Partially reflective element; 1220. Half-reflective and half-transparent mirror; 1221. First right-angle prism; 1222. Second right-angle prism; 1223. Half-reflective and half-transparent membrane; 12201. First optical surface; 12202. Second optical surface; 12203. Third optical surface; 123. Surface light source; 124. Image sensor; 13. Electric wire; 14. Signal line; 20. Operating part.

[0028] The above main component symbols are combined with the accompanying drawings and specific implementation methods to further illustrate the present invention in detail. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0032] Considering that the insertion portion of the existing endoscope usually needs to be equipped with two or even three lighting channels for passing through the lighting fiber bundle and the homogenizer group in order to meet the illumination intensity and uniformity requirements, the distal end size of the existing insertion portion is relatively large, which not only greatly increases the patient's discomfort during use, but also easily causes invasive damage to the patient. Therefore, the present application provides an insertion portion and an endoscope for an endoscope, which can effectively reduce the size of the insertion portion, improve the patient's discomfort during use, and reduce the risk of invasive damage to the patient.

[0033] Specifically, refer to the attached Figures 2 to 5 As shown, one embodiment of the utility model provides an endoscope 1, which may include an endoscope insertion portion 10 and an operating portion 20, wherein the proximal end of the endoscope insertion portion 10 is connected to the operating portion 20 so that the distal end movement of the endoscope insertion portion 10 can be controlled by the operating portion 20 to perform corresponding endoscopic operations.

[0034] More specifically, if Figure 3 , Figure 4 as well as Figure 5As shown, the insertion part 10 for endoscope may include an insertion part body 11 and an optical module 12. The insertion part body 11 has an illumination imaging channel 111 and an instrument channel 112 that are independent of each other. The optical module 12 is arranged in the illumination imaging channel 111, and the optical module 12 includes a lens group 121, a partial reflective element 122, a surface light source 123 and an image sensor 124; the lens group 121 is arranged adjacent to the distal end of the illumination imaging channel 111; the partial reflective element 122 is located on the image side of the lens group 121; the surface light source 123 and the image sensor 124 are symmetrically distributed relative to the partial reflective element 122, so that the surface light source 123, the partial reflective element 122 and the lens group 121 together constitute an illumination system, and the lens group 121, the partial reflective element 122 and the image sensor 124 together constitute an imaging system, so that the illumination system and the imaging system share the lens group 121.

[0035] In this way, Figure 5 As shown, a portion of the illumination light emitted by the surface light source 123 is transmitted to the lens group 121 through the partial reflective element 122, so as to be modulated by the lens group 121 for uniform light, so as to evenly illuminate the object for illumination, which helps to meet the illumination intensity and uniformity requirements; at the same time, Figure 5 As shown, the illumination light reflected by the object is first modulated by the lens group 121 to form imaging light, wherein a portion of the imaging light is then transmitted to the image sensor 124 through the partial reflective element 122 to be received by the image sensor 124 to obtain image information.

[0036] It is worth noting that since the optical module 12 of the present application utilizes the reversible principle of the optical path to allow the illumination system and the imaging system to share the lens group 121, so that the illumination light and the imaging light can be transmitted along the same optical path, the insertion body 11 of the present application only needs to be provided with one illumination and imaging channel 111 and one instrument channel 112, without the need to additionally provide a separate illumination channel, which helps to reduce the outer diameter of the entire insertion portion, improve the patient's discomfort during use, and reduce the risk of invasive injury to the patient.

[0037] In addition, in addition to being an optical lens that modulates the reflected illumination light into imaging light received by the image sensor 124 to perform imaging modulation, the lens group 121 of the present application can also cooperate with the surface light source 123 to perform uniform light illumination without the need for additional uniform light devices, which helps to reduce the cost of the lens. In other words, the lens group 121 in the endoscope insertion part 10 of the present application has both uniform light illumination and imaging functions, so that the insertion part body 11 in the endoscope 1 of the present application only needs to be configured with one illumination imaging channel 111 to achieve the endoscope illumination imaging function, without the need to separately set up an imaging channel and multiple illumination channels as in the prior art, which helps to minimize the size of the insertion part, significantly reduce the cost of the insertion part, and facilitate meeting the low-cost requirements of disposable endoscopes.

[0038] According to the above embodiments of the present application, Figure 4 and Figure 5 As shown, the partially reflective element 122 can be implemented as, but not limited to, a half-reflective half-mirror 1220, which is used to reflect half of the light and transmit the other half of the light, so as to split a beam of light into two sub-beams of light with similar light energy, which helps to take into account the light energy requirements of illumination and imaging. It can be understood that the half-reflective half-mirror 1220 mentioned in the present application can be a half-reflective half-transparent prism (i.e., BS prism) or a half-reflective half-transparent mirror. Of course, in other embodiments of the present application, the partially reflective element 122 can also be implemented as other splitting devices such as a partially reflective lens or a polarization splitter prism (i.e., PBS prism), as long as the light beam can be split into the required sub-beams.

[0039] For example, taking a semi-reflective and semi-transparent prism as an example, Figure 4 and Figure 5 As shown, the half-reflective half-mirror 1220 may have a first optical surface 12201 facing the lens group 121, a second optical surface 12202 facing the surface light source 123, and a third optical surface 12203 facing the image sensor 124; the first optical surface 12201 and the second optical surface 12202 are arranged relative to each other, so that the image sensor 124 is located on the reflection side of the half-reflective half-mirror 1220, and the surface light source 123 is located on the transmission side of the half-reflective half-mirror 1220 along the optical axis direction of the lens group 121. In this way, the half-reflective half-mirror 1220 is used to transmit a portion of the illumination light incident from the second optical surface 12202 to form an illumination sub-light emitted from the first optical surface 12201 and propagates to the lens group 121; and the half-reflective half-mirror 1220 is used to reflect a portion of the imaging light incident from the first optical surface 12201 to form an imaging sub-light emitted from the third optical surface 12203 and propagates to the image sensor 124.

[0040] In other words, if Figure 5As shown, a portion of the illumination light from the surface light source 123 and incident from the second optical surface 12202 is transmitted by the semi-reflective and semi-mirror 1220 to form illumination sub-light emitted from the first optical surface 12201; then, the illumination sub-light emitted from the first optical surface 12201 is homogenized by the lens group 121 and then emitted from the far end of the illumination imaging channel 111 for illumination. Figure 5 As shown, the illumination light reflected by the object is modulated into imaging light by the lens group 121 to propagate to the first optical surface 12201; then, a portion of the imaging light incident from the first optical surface 12201 is reflected by the semi-reflective mirror 1220 to form imaging sub-light emitted from the third optical surface 12203; finally, the imaging sub-light emitted from the third optical surface 12203 is received by the image sensor 124 for imaging. It can be understood that in other examples of the present application, the first optical surface 12201 and the third optical surface 12203 in the semi-reflective mirror 1220 are arranged opposite to each other, so that the surface light source 123 is located on the reflection side of the semi-reflective mirror 1220, and the image sensor 124 is located on the transmission side of the semi-reflective mirror 1220 along the optical axis direction of the lens group 121, and this application will not repeat it.

[0041] Alternatively, if Figure 5 As shown, the semi-reflective and semi-transparent mirror 1220 may include a first right-angle prism 1221, a second right-angle prism 1222, and a semi-reflective and semi-transparent film 1223 glued between the inclined surface of the first right-angle prism 1221 and the inclined surface of the second right-angle prism 1222. The two right-angle surfaces of the first right-angle prism 1221 serve as the first optical surface 12201 and the third optical surface 12203 respectively; a right-angle surface on the second right-angle prism 1222 parallel to the first optical surface 12201 serves as the second optical surface 12202. In other words, the first optical surface 12201 in the semi-reflective and semi-transparent mirror 1220 of the present application is perpendicular to the third optical surface 12203 and parallel to the second optical surface 12202, which helps to reduce the light loss of splitting light and improve the overall light energy utilization rate of the device. In this way, in the illumination light path, among the illumination light emitted by the surface light source 123, only the light transmitted through the half-reflecting half-mirror 1220 can be irradiated onto the object through the lens group 121; and in the imaging light path, among the imaging light reflected by the object and modulated by the lens group 121, only the light reflected through the half-reflecting half-mirror 1220 can be received by the image sensor 124 to form an image.

[0042] According to the above-mentioned embodiments of the present application, the surface light source 123 of the present application can be implemented as a surface array light source formed by an array of multiple LED lamp beads.

[0043] Alternatively, if Figure 2 and Figure 4As shown, the insertion portion 10 for endoscope of the present application further includes an electric wire 13 extending along the lighting imaging channel 111; the distal end of the electric wire 13 is electrically connected to the surface light source 123, and the proximal end of the electric wire 13 extends out of the lighting imaging channel 111, and is used to be electrically connected to an external power supply (not shown in the figure) to obtain power supply.

[0044] Optionally, the image sensor 124 may be implemented as a CCD chip but is not limited to it.

[0045] Alternatively, if Figure 2 and Figure 4 As shown, the endoscopic insertion portion 10 of the present application further includes a signal line 14 extending along the lighting and imaging channel 111; the distal end of the signal line 14 is communicatively connected to the image sensor 124, and the proximal end of the signal line 14 extends out of the lighting and imaging channel 111, and is used to establish a signal connection with an external display (not shown in the figure) for image display.

[0046] It is worth noting that the endoscope 1 of the present application can be used as an independent endoscope, so as to be directly inserted into the body through a sheath or a human cavity (or a surgical fistula) to perform endoscopic imaging of the target tissue; of course, the endoscope 1 of the present application can also be used as an auxiliary endoscope, so as to enter the body through the tool channel of a conventional endoscope, and can still perform endoscopic imaging of the target tissue in the body, because the insertion portion of the endoscope 1 of the present application is extremely thin and can pass through the tool channel of a conventional endoscope.

[0047] In addition, the instrument channel 112 in the insertion part body 11 can be used for inserting surgical instruments to perform corresponding operations. Of course, in other examples of the present application, the insertion part body 11 can also be provided with auxiliary channels such as perfusion holes or suction holes, so as to expand the use function of the endoscope 1 while achieving endoscopic imaging, and this application will not repeat them.

[0048] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. An insertion portion for an endoscope, characterized in that: include: The insertion part body has a lighting imaging channel and an instrument channel which are independent of each other; and An optical module, wherein the optical module is arranged within the illumination imaging channel, and the optical module comprises a lens group, a partial reflective element, a surface light source and an image sensor; the lens group is arranged adjacent to the far end of the illumination imaging channel, the partial reflective element is located on the image side of the lens group, the surface light source and the image sensor are symmetrically distributed relative to the partial reflective element, so that the surface light source, the partial reflective element and the lens group together constitute an illumination system, and the lens group, the partial reflective element and the image sensor together constitute an imaging system.

2. The endoscope insertion portion according to claim 1, characterized in that: The partially reflective element is a semi-reflective and semi-mirror element.

3. The endoscope insertion portion according to claim 2, characterized in that: The semi-reflective mirror has a first optical surface facing the lens group, a second optical surface facing the surface light source, and a third optical surface facing the image sensor.

4. The endoscope insertion portion according to claim 3, characterized in that: The first optical surface is arranged opposite to the second optical surface; or the first optical surface is arranged opposite to the third optical surface.

5. The endoscope insertion portion according to claim 3, characterized in that: The semi-reflective and semi-transparent mirror includes a first right-angle prism, a second right-angle prism, and a semi-reflective and semi-transparent film glued between the inclined surface of the first right-angle prism and the inclined surface of the second right-angle prism.

6. The insertion portion for an endoscope according to any one of claims 1 to 5, characterized in that: The surface light source is a surface array light source formed by an array of multiple LED lamp beads.

7. The endoscope insertion portion according to claim 6, characterized in that: It also includes an electric wire extending along the illumination imaging channel, the distal end of the electric wire is electrically connected to the surface light source, and the proximal end of the electric wire extends out of the illumination imaging channel for being electrically connected to an external power source.

8. The endoscope insertion portion according to any one of claims 1 to 5, characterized in that: The image sensor is a CCD chip.

9. The endoscope insertion portion according to claim 8, characterized in that: It also includes a signal line extending along the illumination and imaging channel, wherein the distal end of the signal line is communicatively connected to the image sensor, and the proximal end of the signal line extends out of the illumination and imaging channel for being communicatively connected to an external display.

10. An endoscope, characterized in that include: Operations Department; and The endoscope insertion portion according to any one of claims 1 to 9, wherein a proximal end of the endoscope insertion portion is connected to the operation portion.

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