Front end shell assembly, insertion portion and endoscope

Abstract

The present invention provides a front end shell assembly, an insertion part and an endoscope, and belongs to the technical field of endoscopes. The front end shell assembly includes a front end shell, a marker and a release structure; the front end shell has a camera module mounting position and a light source mounting position, the marker and the release structure are both installed on the front end shell, the marker is used to provide a visual guidance effect, and the release structure is used to separate the marker and the front end shell so that the marker is separated from the front end shell. The present application sets a release structure to cooperate with the marker so that the marker is separated from the front end shell, thereby achieving the purpose of placing the marker in the body; the marker can provide a visual guidance effect, and when the insertion part is inserted into the human body for the second time, the image information is obtained through the camera module at the front end of the insertion part, and the operator can judge the position of the marker through the image information, thereby quickly moving the insertion part toward the position of the marker, so that the insertion part can quickly reach the first sampling position, reducing the insertion time of the insertion part.

Description

Technical Field

[0001] The present invention belongs to the technical field of endoscopes, and in particular relates to a front end shell component, an insertion part and an endoscope. Background Art

[0002] As a medical device, the insertion part of the endoscope can enter the human body to collect samples from the lesion. After the sampling is completed, the sample is analyzed and the treatment method is determined. After that, the insertion part is controlled to reach the lesion location where the sample was collected for the first time and the lesion location is treated.

[0003] In the related art, a mark is set at the distal end of the insertion part, and the position of the internal mark is detected in vitro to determine the location of the first sampling. When the insertion part is inserted into the human body for the second time, navigation is provided for the insertion part so that the insertion part can quickly move to the lesion location where the first sampling is performed, thereby reducing the operation time.

[0004] However, due to insufficient positioning accuracy, it is difficult to quickly identify the specific location of the first sampling in complex body cavities such as multi-branch three-dimensional overlapping body cavities, and the insertion portion cannot quickly reach the location of the first sampling. Summary of the invention

[0005] The purpose of the present application is to provide a front end shell assembly, an insertion portion and an endoscope to solve the above-mentioned technical problems existing in the prior art.

[0006] This application is implemented as follows:

[0007] In the first aspect, an embodiment of the present application provides a front end shell assembly, which is applied to an endoscope, including a front end shell, a marker and a release structure; the front end shell has a camera module mounting position and a light source mounting position, the marker and the release structure are both installed on the front end shell, the marker is used to provide a visual guidance effect, and the release structure is used to separate the marker and the front end shell so that the marker is detached from the front end shell.

[0008] In a second aspect, an embodiment of the present application provides an insertion portion, comprising a front end shell assembly provided in the embodiment of the first aspect.

[0009] In a third aspect, an embodiment of the present application provides an endoscope, comprising the insertion portion provided by the embodiment of the second aspect.

[0010] The technical solution adopted in this application can achieve the following beneficial effects:

[0011] In the present application, a marker is set to be positioned in the body, and the marker can provide a visual guidance effect. When the insertion part is inserted into the human body for the second time, the image information is obtained through the camera module at the front end of the insertion part. The operator can determine the position of the marker through the image information, and thus quickly move the insertion part toward the position of the marker, so that the insertion part can quickly reach the first sampling position, thereby reducing the insertion time of the insertion part. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 This is a schematic diagram of the overall structure of the front end shell assembly provided in some embodiments of the present application. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the overall structure of the front end shell assembly provided in some embodiments of the present application. Figure 2 ;

[0015] Figure 3 is a cross-sectional view of a front end housing assembly provided in some embodiments of the present application;

[0016] Figure 4 This application is about Figure 3 Detailed view of point A;

[0017] Figure 5 This application is about Figure 3 Detail of point B;

[0018] Figure 6 is a cross-sectional view of a front end housing provided in some embodiments of the present application;

[0019] Figure 7 This is a schematic diagram of the structure of the front end shell assembly of the marker provided in some embodiments of the present application during the marking process. Figure 1 ;

[0020] Figure 8 This is a schematic diagram of the structure of the front end shell assembly of the marker provided in some embodiments of the present application during the marking process. Figure 2 ;

[0021] Fig. 9 is a cross-sectional view of a front end housing assembly of a marker provided by some embodiments of the present application during a marking process;

[0022] Fig.10is a schematic diagram of a partial structure of a front end housing assembly provided in some embodiments of the present application;

[0023] Fig.11 It is a schematic diagram of the coordination between the limiting member, the elastic member and the traction member provided in some embodiments of the present application;

[0024] Fig.12 It is a schematic diagram of the overall structure of an endoscope provided in some embodiments of the present application.

[0025] In the figure: 100-front end shell, 110-installing groove, 120-second clamping structure, 130-slide groove, 200-marker, 210-anchoring protrusion, 300-elastic member, 400-limiting member, 410-slider, 500-traction member, 510-tensioning section, 520-redundant section, 530-connecting section, 600-first clamping structure, 700-electric heating layer, 800-phase change layer, 10-insertion part, 20-endoscope handle. DETAILED DESCRIPTION

[0026] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0027] In each embodiment of the present application, "proximal end" and "distal end" refer to the end of the endoscope and its accessories that are closer to the user in the use environment as the "proximal end" and the end that is farther from the user as the "distal end", where the "distal end" and "proximal end" also correspond to the front and back relationships respectively.

[0028] In the related art, a marker is installed at the front end of the insertion part, and then an external device is used outside the body to locate the position of the marker and determine the sampling position information. When the insertion part is inserted into the human body for the second time, an external device is used for navigation. Through the information feedback of the marker at the front end of the insertion part, the operator can control the insertion part to move toward the sampling position and quickly reach the sampling position. However, in complex body cavities such as body cavities with multiple branches overlapping in three dimensions, the accuracy of this in vitro positioning is not enough. When the insertion part enters one of the three-dimensional overlapping branches, the in vitro device cannot determine the specific branch that the insertion part has entered, and it is difficult to quickly and accurately identify the marker position.

[0029] In view of this, an embodiment of the present application provides a front end shell assembly, which is applied to an endoscope. By installing a marker 200 at the sampling site, a visual guide is provided for the secondary entry of the insertion part 10, so that the insertion part 10 can quickly reach the first sampling position.

[0030] The front end shell assembly includes a front end shell 100, a marker 200 and a release structure. The front end shell 100 is located at the front end of the insertion portion 10 of the endoscope. Devices such as a camera module and a light source are installed inside the front end shell 100. During the use of the endoscope, the surface of the front end shell 100 directly contacts the inner wall of the human body cavity. The front end shell 100 has an instrument channel running through both ends of its axial direction. The instrument channel is used for medical devices such as sampling forceps to pass through to assist the doctor's intraoperative operation. The front end shell 100 also has a camera module installation position and a light source installation position. The camera module installation position is used to install the camera module, and the light source installation position is used to install the light source assembly.

[0031] refer to Figures 1 to 3 As shown, the marker 200 is installed inside the front end shell 100 and moves synchronously with the front end shell 100 to reach the preset marking position. The marker 200 is used to provide visual guidance, and provides different visual effects relative to the inner wall of the body cavity, so that the operator can clearly distinguish the location of the marker 200. The visual effect of the marker 200 can be a color that is obviously different from the inner wall of the body cavity, or it can be a fluorescent substance that improves the visual guidance effect by emitting light. For example, the marker 200 can be a fluorescent labeled drug, such as a fluorescent labeled protein, a fluorescent modified polypeptide, a fluorescent labeled phospholipid, etc.

[0032] In some preferred embodiments, the marker 200 may be a substance that can be dissolved in the human body, saving the subsequent recovery process of the marker 200 and reducing or avoiding the impact of the marker 200 on the surgical operation. In addition, the marker 200 needs to be able to remain in the body for a certain period of time to reserve time for sample analysis, so that after the sample analysis is completed, the marker 200 can still be stably attached to the inner wall of the body cavity at the sampling site to provide visual guidance for the operator.

[0033] The release structure is installed on the front end shell 100 and moves synchronously with the front end shell 100 to reach the preset marking position. The function of the release structure is to release the marker 200 in the human body. Specifically, the release structure is used to separate the marker 200 from the front end shell 100, and to separate the marker 200 from the front end shell 100. When the front end shell 100 is located in the body cavity, the marker 200 separated from the front end shell 100 falls into the body cavity and is positioned in the body cavity.

[0034] The embodiment of the present application sets a marker 200 and releases it in the body cavity, thereby marking the position of the first sampling. The marker 200 can provide a visual guidance effect. During the second insertion of the insertion part 10 into the human body, the operator can quickly determine the position of the marker 200 based on the image information obtained by the camera module in the front end shell 100, and operate the insertion part 10 to move closer to the marker 200, so that the insertion part 10 can quickly reach the position of the first sampling, reducing the time of the second insertion of the insertion part 10. Compared with the in vitro positioning in the prior art, the embodiment of the present application provides a visual guidance effect by marking the marker 200 in the body. Even in a complex body cavity such as a body cavity position with multiple branches overlapping in three dimensions, the marker 200 can provide a clear visual guidance effect to assist the insertion part 10 to quickly and accurately reach the position of the first sampling.

[0035] refer to Figures 1 to 3 As shown, the marker 200 is disposed inside the front end shell 100 , and the front end shell 100 protects the marker 200 to ensure that the marker 200 can smoothly reach the preset marking position.

[0036] In some embodiments, the release structure may be a film coating structure, which wraps the marker 200, and the film coating structure is fixed to the front end shell 100, and is inserted into the human body cavity synchronously with the front end shell 100. The film coating structure can be dissolved in the human body, so the film coating structure is placed at a preset marking position, and after the film coating structure is dissolved, the wrapped marker 200 can be released into the human body cavity to mark the sampling position.

[0037] In some other embodiments of the present application, the release of the marker 200 can be controlled manually. The release structure includes an elastic member 300, a limiter 400 and a traction member 500. The limiter 400 contacts the elastic member 300 to compress the elastic member 300, and the marker 200 is located on the rebound path of the elastic member 300. The distal end of the traction member 500 is connected to the limiter 400, and the proximal end of the traction member 500 extends toward the endoscope handle 20. By controlling the position of the traction member 500, the position of the limiter 400 is controlled, so that the limiter 400 maintains the compression of the elastic member 300, so that the elastic member 300 can be stably in a compressed state. The rebound of the elastic member 300 refers to the process of the elastic member 300 returning to a normal state from a compressed state. The rebound path of the elastic member 300 refers to the movement path of the elastic member 300 during the rebound process of the elastic member 300. The marker 200 is located on the rebound path of the elastic member 300 . During the rebound process of the elastic member 300 , the elastic member 300 can drive the marker 200 to move outside the front end shell 100 , so that the marker 200 is separated from the front end shell 100 .

[0038] The traction member 500 can move along its axial direction under the action of external force. During the movement of the traction member 500, the traction member 500 can control the limit member 400 to release the compression of the elastic member 300, so that the elastic member 300 changes from a compressed state to a decompressed state. The elastic member 300 in the decompressed state can provide power for the marker 200 and drive the marker 200 to move outside the front end shell 100. The schematic diagram of the marker 200 being ejected outside the front end shell 100 can be referred to Figures 7 to 9 shown.

[0039] The front end shell 100 has an outlet, and the marker 200 is detached from the front end shell 100 through the outlet. The outlet of the front end shell 100 is aligned with the inner wall of the body cavity to be marked, so that the marker 200 can be driven to the outside of the front end shell 100 by the elastic member 300 and attached to the inner wall of the body cavity to be marked, thereby completing the fixation of the marker 200.

[0040] In the embodiment of the present application, by controlling the movement of the traction member 500, the marker 200 can be controlled to pop out from the front end shell 100 and attached to the inner wall of the body cavity at the designated position. The overall operation is convenient and quick, and the conventional functional operation of the endoscope will not be affected. The proximal end of the traction member 500 can be directly extended to the endoscope handle 20. When the endoscope is in use, when the insertion part 10 is inserted into the human body, the operator can directly control the movement of the traction member 500 through the proximal end of the traction member 500 located at the endoscope handle 20, and quickly control the marker 200 to pop out. The traction member 500 is relatively long, and generally a rope-like structure can be selected, extending along the extension direction of the insertion part 10 and located inside the insertion part 10. When the traction member 500 is short and its proximal end cannot extend to the endoscope handle 20, an additional connecting rope can be set to be fixed to the proximal end of the traction member 500, and the connecting rope extends to the endoscope handle 20. The operator controls the traction member 500 by controlling the connecting rope.

[0041] The marker 200 can be directly set in the original instrument cavity inside the front end shell 100, and the outlet of the front end shell 100 refers to the outlet of the instrument cavity; the marker 200, the elastic member 300 and the limit member 400 are all installed in the instrument cavity accordingly. In some embodiments of the present application, a mounting groove 110 can be set on the surface of the front end shell 100, and the marker 200 is installed in the mounting groove 110, which can avoid the influence of the marker 200 located in the instrument cavity on the operation of the endoscope. When the marker 200 is installed in the mounting groove 110, the outlet of the front end shell 100 refers to the outlet of the mounting groove 110.

[0042] The front end shell 100 is provided with a mounting groove 110 on its surface, and the opening of the mounting groove 110 is located on the surface of the front end shell 100, so that the objects in the mounting groove 110 can pass through the mounting groove 110 and contact the inner wall of the human body cavity. Figure 3 As shown, the marker 200, the elastic member 300 and the stopper 400 are all installed inside the installation slot 110. The marker 200 is arranged close to the notch of the installation slot 110 relative to the elastic member 300, providing a position condition for the marker 200 to be separated from the installation slot 110.

[0043] The mounting groove 110 can be set on the distal end surface of the front end shell 100, or can be set on the circumferential side wall of the front end shell 100. When the mounting groove 110 is set on the distal end surface of the front end shell 100, since the camera module is also set on the distal end surface of the front end shell 100, the operator can determine the position of the marker 200 to be marked through the image information obtained by the camera module, and then align the marker 200 with the preset inner wall of the body cavity for marking. When the mounting groove 110 is set on the circumferential side wall of the front end shell 100, it can avoid occupying the front end surface of the front end shell 100, providing a more flexible layout space for various devices on the front end surface.

[0044] The marker 200 is disposed inside the front end shell 100. Under the elastic force of the elastic member 300, the marker 200 first needs to pass through the outlet of the front end shell 100, move from the inside of the front end shell 100 to the outside of the front end shell 100, and then adhere to the inner wall of the body cavity. In some embodiments of the present application, the marker 200 may be connected to the front end shell 100 to prevent the marker 200 from accidentally detaching from the front end shell 100 during the insertion of the front end shell 100 into the human body.

[0045] Exemplarily, the marker 200 can be directly connected to the front end shell 100. The marker 200 is directly fixed to the inner wall of the front end shell 100. After the marker 200 is driven by the elastic member 300, the connection between the marker 200 and the front end shell 100 is first broken, and then the marker 200 is driven by the elastic member 300 to move outside the front end shell 100.

[0046] Exemplarily, the marker 200 may also be indirectly connected to the front end shell 100. The marker 200 is fixed inside the front end shell 100 through the stopper 400 or other components, that is, the marker 200 is fixed to the stopper 400 or other components, and the stopper 400 or other components are constrained in the front end shell 100. When the marker 200 is attached to the inner wall of the body cavity, the fixed connection between the marker 200 and the stopper 400 or other components is released, and the insertion portion 10 can be normally withdrawn from the human body.

[0047] In some embodiments of the present application, the stopper 400 may be a structure installed on the wall of the front end shell 100, the elastic member 300 abuts against the stopper 400, and the stopper 400 is connected to the traction member 500. When the operator controls the movement of the traction member 500, the operator pulls the traction member 500 toward the proximal end, thereby changing the position of the stopper 400. After the position of the stopper 400 changes, the elastic member 300 can no longer be compressed, and the elastic member 300 changes from a compressed state to a decompressed state. The elastic member 300 that is not restricted recovers its deformation, and provides power to the marker 200 during the process of recovering its deformation, driving the marker 200 to move.

[0048] Exemplarily, the inner wall of the front end shell 100 is provided with a slot, the edge of the limiter 400 is engaged in the slot, and the limiter 400 is a folding structure. When the traction member 500 pulls the limiter 400 toward the proximal end of the traction member 500, the limiter 400 gradually begins to fold. Fig.11 As shown, the dotted line indicates the position and state of the limiter 400 before folding, and the solid line indicates the limiter 400 during folding. The edge of the limiter 400 is out of the slot, and the elastic member 300 is a spring. After folding, the limiter 400 directly passes through the middle of the elastic member 300, and the elastic member 300 can no longer be compressed, and the elastic member 300 directly pops out.

[0049] Exemplarily, the limiting member 400 is a strip-shaped structure, and both ends of the limiting member 400 are clamped in the wall surface of the front end shell 100. By pulling the traction member 500, the structure of the limiting member 400 is damaged, thereby releasing the compression effect on the elastic member 300.

[0050] In other embodiments of the present application, the stopper 400 is located between the elastic member 300 and the marker 200, and the stopper 400 is movably disposed in the front end shell 100. The elastic member 300 can drive the stopper 400 and the marker 200 to move synchronously to the outside of the front end shell 100. Figure 3 and Fig. 9 As shown. The limit member 400 contacts the elastic member 300 to compress the elastic member 300. The limit member 400 is connected to the traction member 500, and the traction member 500 is in a tensioned state, providing a pulling force for the limit member 400, so that the limit member 400 can compress the elastic member 300. The limit member 400 is in balance under the pulling force of the traction member 500 and the elastic force of the elastic member 300. When the operator controls the traction member 500, the control of the traction member 500 is weakened, thereby weakening the pulling force of the traction member 500 on the limit member 400. As the pulling force decreases, the compression effect of the limit member 400 on the elastic member 300 is gradually released, and the elastic member 300 recovers its deformation, pushing the limit member 400 and the marker 200 to move.

[0051] The stopper 400 is movably arranged in the front end shell 100. Since the stopper 400 is connected to the traction member 500, the elastic member 300 can push at least part of the stopper 400 out of the front end shell 100. Subsequently, the stopper 400 can be driven into the front end shell 100 by pulling the traction member 500 to facilitate the withdrawal of the insertion portion 10. Since part of the stopper 400 can be pushed out of the front end shell 100, the marker 200 in contact with the stopper 400 moves synchronously with the stopper 400. After the marker 200 is pushed out of the front end shell 100 by the stopper 400, refer to Figures 7 to 9 As shown, the moving direction of the marker 200 is limited by the limiter 400, and the moving direction of the marker 200 is predictable. Therefore, the limiter 400 can push the marker 200 to move toward the preset position, so that the marker 200 can be smoothly attached to the preset cavity wall position.

[0052] If the elastic member 300 directly contacts the marker 200, the marker 200 is pushed out of the front end shell 100 and moves toward the inner wall of the body cavity under the action of inertia. The moving direction of the marker 200 outside the front end shell 100 is uncertain, and the probability of the marker 200 being attached to the preset cavity wall position is low. The position limiter 400 is set to move synchronously with the marker 200, so that the moving direction of the marker 200 outside the front end shell 100 can be determined, the probability of the marker 200 being attached to the preset cavity wall position can be increased, and the accuracy of the marker 200 attachment position can be improved.

[0053] In some preferred embodiments of the present application, reference is made to Figures 2 to 4 , the traction member 500 is connected to the first clamping structure 600. Figure 4 , Figure 6 and Figure 8 , the front end housing 100 is provided with a second clamping structure 120. Figure 4 As shown, the first clamping structure 600 is fixed to the second clamping structure 120, thereby limiting the position of the traction member 500 and preventing the traction member 500 from moving along its axial direction toward its distal end, so that the position of the traction member 500 is stable. Corresponding to the traction member 500, the position of the limiting member 400 is stable, and the compression effect on the elastic member 300 is also stable, which can avoid the situation where the traction member 500 moves accidentally and causes the marker 200 to be accidentally ejected from the front end shell 100.

[0054] In some specific embodiments, the first clamping structure 600 may be a block structure fixed outside the traction member 500, and the second clamping structure 120 may be a groove structure provided on the front end shell 100. Figure 4As shown, the first clamping structure 600 is directly clamped and fixed on the second clamping structure 120 to complete the fixation of the two. The second clamping structure 120 can also be set on the step surface of the front end shell 100, the step surface is on the moving path of the first clamping structure 600, and the first clamping structure 600 is pressed against the step surface to squeeze and fix the traction member 500.

[0055] In some embodiments of the present application, reference Figure 3 and Figure 4 As shown, along the direction from the distal end to the proximal end of the traction member 500, the traction member 500 includes a tensioning section 510, a redundant section 520 and a connecting section 530 in sequence. The tensioning section 510 is tensioned and arranged between the stopper 400 and the second clamping structure 120. The distal end of the tensioning section 510 is connected to the elastic member 300, and the proximal end is fixed between the first clamping structure 600 and the second clamping structure 120. The tensioning section 510 provides a pulling force for the stopper 400 to stabilize the position of the stopper 400. Both ends of the redundant section 520 are squeezed and fixed between the first clamping structure 600 and the second clamping structure 120. The distal end of the redundant section 520 is the proximal end of the tensioning section 510, and the proximal end of the redundant section 520 is the distal end of the connecting section 530. Both ends of the redundant section 520 are fixed, and the redundant section 520 is in a relaxed state. The connecting section 530 extends toward the endoscope handle 20.

[0056] The operator controls the connecting section 530 to move along its axial direction toward the proximal end, pulling the first clamping structure 600 to move so that the first clamping structure 600 is separated from the second clamping structure 120. After separation, the first clamping structure 600 and the second clamping structure 120 cannot squeeze the two ends of the redundant section 520, and the redundant section 520 is released.

[0057] Before the redundant section 520 is released, the tensioning section 510 is pulled by the limiting member 400 and is in a tensioned state. The tensioning section 510 provides tension for the limiting member 400 , and the position of the limiting member 400 remains stable. The distance between the limiting member 400 and the second clamping structure 120 is the length of the tensioning section 510 .

[0058] After the redundant section 520 is released, the maximum distance between the limit member 400 and the second clamping structure 120 is the sum of the lengths of the tensioning section 510 and the redundant section 520. The redundant section 520 provides a movable distance for the limit member 400. The position of the limit member 400 cannot be maintained stable and the elastic member 300 can no longer be compressed. Therefore, when the redundant section 520 is released, the compression of the elastic member 300 by the limit member 400 is also released.

[0059] When the tensioning section 510 is in a tensioned state, it can pull the limiting member 400, so that the limiting member 400 maintains balance under the tension of the tensioning section 510 and the elastic force of the elastic member 300, and maintains a stable position. When the redundant section 520 is released, the tensioning state of the tensioning section 510 is released, so the traction member 500 can no longer pull the limiting member 400, and the limiting member 400 is subjected to unbalanced force. Driven by the elastic force of the elastic member 300, it will move toward the outside of the front end shell 100, drive the marker 200 to move synchronously, and complete the release of the marker 200.

[0060] When the first clamping structure 600 and the second clamping structure 120 are separated, the squeezing and fixing effects of the two clamping structures on the redundant segment 520 are simultaneously released, and the movable distance of the limit member 400 increases instantly. At this time, the traction member 500 cannot provide pulling force to the limit member 400. Driven by the elastic member 300, the limit member 400 can move quickly. At this time, the resistance encountered by the limit member 400 from the traction member 500 is small or even zero, and the movement of the limit member 400 driven by the elastic member 300 is smoother.

[0061] By setting the redundant section 520 to provide a movable distance for the limit member 400, in the process of controlling the movement of the connecting section 530 to release the marker 200, the moving distance of the connecting section 530 is shorter, which can avoid a large change in the position of the connecting section 530 relative to the insertion part 10, resulting in a large friction between the connecting section 530 and the insertion part 10, resulting in damage to the structure of the connecting section 530.

[0062] After the marker 200 is attached to the inner wall of the body cavity, the operator can pull the connecting section 530 to drive the limit member 400 to reset, so that the limit member 400 moves back into the front end shell 100 to prevent the limit member 400 from being exposed outside the front end shell 100 and affecting the insertion portion 10 from withdrawing from the human body.

[0063] In some embodiments, the mounting groove 110 is disposed at the distal end surface of the front end shell 100, the mounting groove 110 is opened along the axial direction of the front end shell 100, the stopper 400 is movably disposed in the mounting groove 110 along the axial direction of the front end shell 100, and the compression direction of the elastic member 300 is parallel to the axial direction of the front end shell 100. In the process of the elastic member 300 driving the marker 200 to move, the moving direction of the marker 200 is the same as the axial direction of the front end shell 100, which makes it easier for the operator to determine the expected marking position of the marker 200 and increases the probability that the marker 200 is attached to the preset inner wall of the body cavity. The traction member 500 is extended along the axial direction of the insertion portion 10, which makes it easier for the operator to control the movement of the traction member 500 and reduces the friction between the traction member 500 and the insertion portion 10.

[0064] The marker 200 and the stopper 400 can be in direct contact and cooperation, and there is no connection between the two. The stopper 400, driven by the elastic member 300, pushes the marker 200 to move synchronously. In some preferred embodiments, the marker 200 is fixed to the stopper 400, and the stopper 400 can stably push the marker 200 to the preset inner wall of the body cavity, and the connection structure between the marker 200 and the stopper 400 needs to be set to a releasable structure, so as to ensure that the stopper 400 can be smoothly recovered into the front end shell 100 without affecting the insertion part 10 from exiting the human body.

[0065] Exemplary, reference Figure 3 and Figure 5 The electric heating layer 700 and the phase change layer 800 are fixedly arranged between the stopper 400 and the marker 200, wherein the electric heating layer 700 is arranged close to the stopper 400, and the phase change layer 800 is arranged close to the marker 200. The electric heating layer 700 is fixed to the stopper 400 and the phase change layer 800 at the same time, and the phase change layer 800 is fixed to the marker 200, so as to fix the marker 200 and the stopper 400. The electric heating layer 700 is connected to a power line. When the electric heating layer 700 is powered on, the electric heating layer 700 can generate heat. After the heat increases, the phase change layer 800 undergoes a phase change, and the phase change layer 800 changes from a solid phase to a liquid phase. The phase change layer 800 that becomes a liquid phase cannot be fixed to the marker 200 or the electric heating layer 700, so the marker 200 is separated from the stopper 400.

[0066] The electric heating layer 700 is arranged to cooperate with the phase change layer 800. Before the phase change layer 800 is transformed into a liquid phase, the marker 200 can be stably connected to the stopper 400, and the probability of the marker 200 accidentally detaching is very small or even zero. After the phase change layer 800 is transformed into a liquid phase, the marker 200 can be smoothly detached from the stopper 400. In some preferred embodiments, the proximal end face and the side wall of the marker 200 can be fixed with the phase change layer 800. Figure 5 As shown, the stability of the connection between the marker 200 and the limiting member 400 is further improved.

[0067] Further preferably, the traction member 500 can be set as a power cord connected to the electric heating layer 700. Directly using the power cord as the traction member 500 can reduce the number of pipelines passing through the insertion part 10, and can also avoid the situation where the number of pipelines in the insertion part 10 is large and entangled. In addition, since the power cord is connected to the electric heating layer 700, the power cord will move synchronously with the electric heating layer 700 during the release of the marker 200. If the power cord is set separately, the power cord will rub against the insertion part 10 during the movement and is easily damaged; in the subsequent recovery process of the limiter 400, the power cord also needs to be pulled to prevent the power cord from affecting the recovery of the limiter 400. Using the power cord as the traction member 500 and setting the redundant section 520 can reduce the moving distance of the power cord in the insertion part 10 and reduce the probability of the power cord being damaged by friction.

[0068] In some embodiments of the present application, a limiting structure needs to be set between the limiting member 400 and the front end shell 100 to limit the movable distance of the limiting member 400 and prevent the limiting member 400 from detaching from the front end shell 100, resulting in the limiting member 400 being unable to be recovered.

[0069] For example, when the traction member 500 is provided with the first clamping structure 600 and the front end shell 100 is provided with the second clamping structure 120, the traction member 500 may be provided to directly penetrate the second clamping structure 120 and extend toward the stop member 400, as shown in FIG. Figure 8 and Fig. 9 As shown, the second clamping structure 120 is located on the moving path of the first clamping structure 600. In the process of the elastic member 300 driving the limiting member 400 and the marker 200 to move, the traction member 500 is pulled to move, and the first clamping structure 600 follows the traction member 500 to move until it abuts against the second clamping structure 120. The second clamping structure 120 can cooperate with the first clamping structure 600 to prevent the traction member 500 from moving further, thereby preventing the limiting member 400 from moving further, and limiting the moving distance of the limiting member 400.

[0070] For example, a sliding structure may be provided between the front end shell 100 and the stopper 400 to limit the movable travel of the stopper 400 in the front end shell 100, thereby preventing the stopper 400 from being separated from the front end shell 100 and causing the stopper 400 to be unable to be recovered. Figure 3 and Fig. 9As shown, the sliding structure includes a slide groove 130 and a slider 410. One of the front end shell 100 and the limiting member 400 is provided with the slider 410, and the other is provided with the slide groove 130. The slider 410 is slidably arranged in the slide groove 130. The slide groove 130 has two ends, one of which is close to the outlet of the front end shell 100 and the other is far away from the outlet of the front end shell 100. The slider 410 and the end of the slide groove 130 close to the outlet of the front end shell 100 are limitedly matched to prevent the slider 410 from being separated from the slide groove 130 and the limiting member 400 from being separated from the front end shell 100.

[0071] When the front end housing 100 is provided with the mounting groove 110 and the stopper 400 is installed in the mounting groove 110, the slide groove 130 can be directly provided on the inner wall of the mounting groove 110 and communicated with the mounting groove 110. Figure 6 shown.

[0072] In some preferred embodiments of the present application, a plurality of anchoring protrusions 210 are provided on the surface of the marker 200. Figure 5 As shown, the anchoring protrusion 210 can assist the marker 200 to penetrate into the inner wall of the body cavity, thereby improving the stability of the marker 200 attached to the inner wall of the body cavity. The anchoring protrusion 210 can be a truncated cone structure or a conical structure. Preferably, a plurality of anchoring protrusions 210 are provided on the surface of the marker 200 away from the elastic member 300 to assist the marker 200 to penetrate into the inner wall of the body cavity.

[0073] In some preferred embodiments of the present application, reference is made to Figure 6 As shown, the mounting groove 110 can be set as an annular structure, surrounding the instrument channel of the front end shell 100. Fig.10 As shown, the limiter 400 is also configured as an annular structure, and the marker 200, the electric heating layer 700 and the phase change layer 800 are also configured as an annular structure. The marker 200 with an annular structure has a larger overall size and can provide a clearer visual guidance effect. When the elastic member 300 and the traction member 500 are connected to the limiter 400, there is more space to separate the two, so as to avoid cross-entanglement between the traction member 500 and the elastic member 300. Multiple elastic members 300 can be provided, refer to Fig.10 As shown, the multiple elastic members 300 provide a relatively large driving force for the limiting member 400 , and the multiple elastic members 300 are evenly distributed along the circumference of the mounting groove 110 , so that the limiting member 400 is subjected to a uniform and stable force.

[0074] The embodiment of the present application also provides a positioning method, using the front end shell assembly provided in any of the above embodiments to perform positioning in the human body, and the specific operation steps include:

[0075] First, the insertion portion 10 of the endoscope is inserted into the human body cavity, and the insertion portion 10 is operated to move forward to move the front end housing 100 to the target position. The target position is the lesion position, and the lesion position needs to be sampled.

[0076] The position of the front end housing 100 is adjusted so that the marker 200 can be aligned with the preset marking position. The marker 200 is located inside the front end housing 100, and aligning the marker 200 with the preset marking position actually aligns the outlet of the front end housing 100 with the preset marking position.

[0077] After the position adjustment of the front end shell 100 is completed, the operator can control the traction member 500 to move, thereby driving the marker 200 to move outside the front end shell 100, so that the marker 200 is attached to the inner wall of the body cavity at the preset marking position. The attachment of the marker 200 is completed, and the position of the lesion is located. After the operator controls the traction member 500 to move, the traction member 500 can be used to control the limit member 400 to release the compression of the elastic member 300, and the elastic member 300 is changed from a compressed state to a decompressed state. The elastic member 300 in the decompressed state can provide power for the marker 200, drive the marker 200 to move toward the outside of the front end shell 100, and make the marker 200 attached to the inner wall of the body cavity.

[0078] In some preferred embodiments, the front end housing 100 is provided with a mounting groove 110, and the marker 200 is located in the mounting groove 110. In the mounting groove 110, only the marker 200 will pass through the notch of the mounting groove 110 and leave the front end housing 100, and aligning the notch of the mounting groove 110 with the preset marking position makes it easier to accurately mark the marker 200 at the preset position.

[0079] Generally, the position of the front end housing 100 is adjusted after sampling the lesion position, and the traction member 500 is controlled so that the marker 200 is attached to the preset marking position. In other embodiments, the position of the front end housing 100 can also be adjusted before sampling, and the traction member 500 can be controlled to eject the marker 200, and sampling can be performed after the marker 200 is attached.

[0080] The present application embodiment also provides an insertion portion 10, referring to Fig.12 As shown, it includes a front end shell assembly provided by any of the above embodiments.

[0081] The present application also provides an endoscope, including the insertion portion 10 provided in the above embodiment, Fig.12 As shown, the insertion portion 10 is connected to the endoscope handle 20. The endoscope can be a bronchoscope, a suction endoscope, a pyeloscope, an esophagoscope, a gastroscope, an enteroscope, an otoscope, a nasal endoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A front end housing assembly, applied to an endoscope, characterized in that: It comprises a front end shell (100), a marker (200) and a release structure; The front end housing (100) has a camera module mounting position and a light source mounting position, the marker (200) and the release structure are both mounted on the front end housing (100), the marker (200) is used to provide a visual guidance effect, and the release structure is used to separate the marker (200) from the front end housing (100) so that the marker (200) is separated from the front end housing (100); The release structure comprises an elastic member (300), a limiting member (400) and a pulling member (500); The marker (200) is arranged inside the front end shell (100), the limiting member (400) contacts the elastic member (300) to compress the elastic member (300), the marker (200) is located on the rebound path of the elastic member (300), the distal end of the traction member (500) is connected to the limiting member (400), and the proximal end of the traction member (500) extends toward the endoscope handle (20); The traction member (500) can move along its axial direction under the action of an external force to control the limiting member (400) to release the compression of the elastic member (300); the elastic member (300) in the decompressed state can provide power for the marker (200) to drive the marker (200) to separate from the front end shell (100); The limiting member (400) is located between the elastic member (300) and the marker (200), the limiting member (400) is movably arranged in the front end shell (100), and the elastic member (300) can drive the limiting member (400) and the marker (200) to move synchronously to the outside of the front end shell (100); The traction member (500) is connected to a first clamping structure (600), the front end shell (100) is provided with a second clamping structure (120), and the first clamping structure (600) and the second clamping structure (120) are clamped and fixed to prevent the traction member (500) from moving along its axial direction toward its distal end; The traction member (500) comprises a tensioning section (510), a redundant section (520) and a connecting section (530) arranged from the distal end to the proximal end thereof; the tensioning section (510) is tensionedly arranged between the limiting member (400) and the second clamping structure (120); both ends of the redundant section (520) are squeezed and fixed between the first clamping structure (600) and the second clamping structure (120); the connecting section (530) can be moved along its axial direction toward its proximal end under the action of an external force, so as to drive the first clamping structure (600) to separate from the second clamping structure (120) and release the squeezing of the redundant section (520); the redundant section (520) is used to provide a movable distance for the limiting member (400) to release the compression of the elastic member (300) by the limiting member (400).

2. A front end housing assembly, applied to an endoscope, characterized in that: It comprises a front end shell (100), a marker (200) and a release structure; The front end shell (100) has a camera module mounting position and a light source mounting position, the marker (200) and the release structure are both mounted on the front end shell (100), the marker (200) is used to provide a visual guidance effect, and the release structure is used to separate the marker (200) from the front end shell (100) so that the marker (200) is detached from the front end shell (100); The release structure comprises an elastic member (300), a limiting member (400) and a pulling member (500); The marker (200) is arranged inside the front end shell (100), the limiting member (400) contacts the elastic member (300) to compress the elastic member (300), the marker (200) is located on the rebound path of the elastic member (300), the distal end of the traction member (500) is connected to the limiting member (400), and the proximal end of the traction member (500) extends toward the endoscope handle (20); The traction member (500) can move along its axial direction under the action of an external force to control the limiting member (400) to release the compression of the elastic member (300); the elastic member (300) in the decompressed state can provide power for the marker (200) to drive the marker (200) to separate from the front end shell (100); The limiting member (400) is located between the elastic member (300) and the marker (200), the limiting member (400) is movably arranged in the front end shell (100), and the elastic member (300) can drive the limiting member (400) and the marker (200) to move synchronously to the outside of the front end shell (100); An electric heating layer (700) and a phase change layer (800) are fixedly arranged between the limit member (400) and the marker (200), wherein the electric heating layer (700) is arranged close to the limit member (400), and the phase change layer (800) is arranged close to the marker (200), and the electric heating layer (700) is connected to a power line, and when the electric heating layer (700) is energized, the electric heating layer (700) can provide heat to transform the phase change layer (800) from a solid phase to a liquid phase.

3. A front end housing assembly according to claim 2, characterized in that: The traction member (500) is the power line to which the electric heating layer (700) is connected.

4. A front end housing assembly according to any one of claims 1 to 3, characterized in that: The surface of the marker (200) is provided with a plurality of anchoring protrusions (210); and / or the marker (200) is capable of dissolving in the body.

5. An insertion portion, characterized in that: Comprising the front end shell assembly according to any one of claims 1-4.

6. An endoscope, characterized in that: It comprises the insertion part (10) as claimed in claim 5.

Images