Endoscope and tip portion thereof

Abstract

The application provides an endoscope and a head end thereof. The head end comprises a head end seat shell and a lifting forceps seat. The head end seat shell is provided with a containing cavity in communication with an instrument channel of the endoscope and forming an extension window for a medical instrument to extend out of. An abutting portion is arranged on the edge of the extension window. The lifting forceps seat is provided with a first guide surface extending from a distal end to a rotating shaft end. The first guide surface is used for supporting the medical instrument and guiding the medical instrument to a preset path. The first guide surface has an abutting position corresponding to the abutting portion. When the lifting forceps seat is lifted to a preset angle, the abutting position cooperates with the abutting portion to clamp and fix the medical instrument supported by the first guide surface. The distal end of the lifting forceps seat is further provided with a positioning groove. At least part of the positioning groove is formed on the first guide surface. The positioning groove is used for positioning the medical instrument on the preset path. The abutting position is located outside the positioning groove. Based on the above scheme, the convenience of instrument replacement can be improved.

Description

Technical Field

[0001] This invention relates to the field of endoscopy technology, and more specifically, to an endoscope and its tip. Background Technology

[0002] Endoscopic imaging, as a non-invasive imaging method, can effectively extend the human field of vision and is widely used in imaging diagnosis and image-guided treatment in many fields such as the digestive tract, cardiovascular system, urinary system and respiratory system, greatly improving the accuracy of disease examination.

[0003] The part of an endoscope that enters the human body is a long, narrow insertion section. This section typically contains an instrument channel. During endoscopic diagnosis or treatment, medical instruments can pass through this channel to reach the distal end of the endoscope to assist in the diagnosis or treatment. To ensure the medical instruments reach the appropriate position after exiting the instrument channel, a guidewire is used for guidance. The guidewire can be delivered to the designated location using a cannula. Specifically, the cannula is first inserted through the instrument channel to the predetermined position within the body. Then, the guidewire is inserted into the cannula's channel and guided to the same predetermined position. The cannula is then withdrawn, and other medical instruments, such as nipple cutters, can follow the guidewire to the intended location within the body. However, when withdrawing the cannula or pushing the nipple cutter, the guidewire is prone to positional changes due to friction between the guidewire and the cannula or between the guidewire and the nipple cutter. Therefore, during the process of the doctor withdrawing the catheter and inserting the nipple cutter, the nurse usually needs to assist in holding the guidewire and cooperating with the doctor's operation to apply a force opposite to the friction generated on the guidewire. At the same time, the nurse should avoid the guidewire from swaying left and right in order to keep the guidewire in the same position as much as possible. This process is time-consuming and laborious. Summary of the Invention

[0004] To at least partially address the problems existing in the prior art, according to one aspect of the present invention, a tip end of an endoscope is provided. The tip end includes a tip end housing and a lifting clamp seat. The headstock housing has a receiving cavity that communicates with the instrument channel of the endoscope and forms an extension window for the medical device to extend out. An abutment portion is provided on the edge of the extension window. A lifting clamp seat is rotatably disposed within the receiving cavity to adjust the direction of the medical device's extension from the extension window. The lifting clamp seat includes a rotating shaft end and a distal end. A first guide surface extending from the distal end toward the rotating shaft end is provided on the lifting clamp seat. The first guide surface supports the medical device and guides it onto a preset extension path or a preset retraction path. An abutment position corresponding to the abutment portion is located on the first guide surface. When the lifting clamp seat is raised to a preset angle, the abutment position cooperates with the abutment portion to clamp and fix the medical device supported by the first guide surface. A positioning groove is also provided at the distal end of the lifting clamp seat. At least a portion of the positioning groove is formed on the first guide surface. The positioning groove is used to position the medical device located on the extension path or the retraction path, wherein the abutment position is located outside the positioning groove.

[0005] The head end provided by the present invention has an abutment portion that can clamp the medical device together with the first guide surface, thereby mechanically locking the medical device and preventing the position of the medical device from changing; the positioning groove can be used to position the medical device located on the extension path or the retraction path, and there can be a large friction between the medical device and the positioning groove, making the medical device less likely to sway left and right. Specifically, during the entire process of replacing medical devices, such as when the cannula is retracted along the guidewire in the instrument channel and when the nipple cutter is extended along the guidewire in the instrument channel, the abutment part can clamp the guidewire together with the first guide surface, so that the guidewire is mechanically locked and its position will not change. However, before the farthest end of the cannula is retracted to the abutment position (i.e., the mechanically locked position of the guidewire) or after the farthest end of the nipple cutter is extended to the abutment position (i.e., the mechanically locked position of the guidewire), although the cannula or nipple cutter is sleeved on the guidewire so that the abutment part cannot mechanically lock the guidewire together with the first guide surface, the large friction between the positioning groove and the guidewire can form a radial constraint on the guidewire, so that the radial position of the guidewire will not shift. As can be seen, the forceps holder of this invention has a mechanically locked state and a semi-locked state. When changing medical instruments along the guide wire, whether during the instrument exchange process on the forceps holder or the movement of the medical instrument within the instrument channel, the position of the guide wire remains stable. This makes using the endoscope simpler and more convenient for the operator. Furthermore, in this invention, the contact point for mechanically locking the medical instrument is located on the first guide surface and outside the positioning groove. The relatively regular shape of this surface allows for more even force distribution on the guide wire, reducing the impact of stress concentration and minimizing damage to the medical instrument. This avoids the need to replace the medical instrument during use due to damage, making the endoscope more stable and improving the operator's experience.

[0006] For example, the distal end of the lifting forceps seat has a positioning groove outlet, and the positioning groove extends from the positioning groove outlet along a predetermined route toward the rotating shaft end to form a positioning groove; the medical device includes a first-size device, the diameter of the first-size device is less than or equal to a preset value, and at least half of the first-size device can be accommodated in the positioning groove outlet.

[0007] For example, when the medical device supported by the first guide surface is a first-specification device, and the forceps seat is raised to a preset angle, at least half of the first-specification device is located within the positioning groove outlet.

[0008] For example, the cross-section of the positioning groove outlet is V-shaped and perpendicular to the predetermined route.

[0009] For example, the opening size of the positioning groove perpendicular to the predetermined path gradually decreases from the distal end toward the rotating shaft end.

[0010] For example, the first guide surface extends along the length axis of the clamp holder, and the predetermined path intersects the length axis of the clamp holder.

[0011] For example, there is a gap between the abutment position and the positioning groove.

[0012] For example, the predetermined route and the central axis of the first guide surface together define an inscribed circle passing through the positioning groove outlet and the abutment position, the diameter of which is greater than the minimum bending diameter of the first specification instrument.

[0013] For example, the head end also includes an optical imaging assembly, which and the protruding window are located on the same side of the head end housing, with a predetermined path inclined toward the center of the imaging area of ​​the optical imaging assembly.

[0014] According to another aspect of the invention, an endoscope is provided. The endoscope includes any of the tip types described above.

[0015] A series of simplified concepts are introduced in the description of the invention, which will be further explained in detail in the detailed description section. This description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0016] The advantages and features of the present invention will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0017] The following figures are included as part of this invention for understanding its principles. The figures illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention. In the figures,

[0018] Figure 1 This is a schematic diagram of an endoscope according to an exemplary embodiment of the present invention;

[0019] Figure 2 This is a partial perspective view of the structure near the tip of an endoscope according to an exemplary embodiment of the present invention;

[0020] Figure 3 for Figure 2 A partial three-dimensional view of the lifting clamp seat and its surrounding structures in the endoscope shown;

[0021] Figure 4 for Figure 3 The exploded view of the clamp holder and its surrounding structure is shown.

[0022] Figure 5 This is a partial perspective view of the structure near the tip of an endoscope according to an exemplary embodiment of the present invention, wherein a medical device is supported on a lifting forceps seat and the lifting forceps seat is in an initial state.

[0023] Figure 6 This is a partial perspective view of the structure of an endoscope near the tip end according to an exemplary embodiment of the present invention, wherein a medical device is supported on the lifting forceps and the lifting forceps is in a semi-locked state.

[0024] Figure 7 for Figure 6 A cross-sectional view of the structures near the tip of the endoscope shown;

[0025] Figure 8 This is a partial perspective view of the structure of an endoscope near the tip end according to an exemplary embodiment of the present invention, wherein a medical device is supported on the lifting forceps and the lifting forceps is in a mechanically locked state;

[0026] Figure 9 for Figure 8 A cross-sectional view of the structures near the tip of the endoscope shown;

[0027] Figure 10 This is a perspective view of a forceps holder according to an exemplary embodiment of the present invention, viewed from a perspective parallel to the protruding window, wherein a medical device is supported on the forceps holder and the forceps holder is in a mechanically locked state.

[0028] Figure 11 This is a partial perspective view of the structure near the tip of an endoscope according to an exemplary embodiment of the present invention, wherein a medical device is supported on a lifting clamp seat, and the lifting clamp seat is in a mechanically locked state; and

[0029] Figure 12 for Figure 11 The image shows a magnified view of the structure near the tip of the endoscope.

[0030] The above figures include the following reference numerals:

[0031] 10. Insertion part; 100. Head end; 110. Head end housing; 111. Extension window; 112. Abutment part; 1121. Abutment surface; 113. Instrument channel outlet; 120. Lifting clamp seat; 121. Rotating shaft end; 122. Distal end; 123. First guide surface; 124. Positioning groove; 1241. Positioning groove outlet; 125. Second guide surface; 126. Rotating part; 130. Optical imaging assembly; 131. Illumination window; 132. Camera; 140. Steel wire rope; 150. Pin; 160. Rotating arm; 170. Head end cap; 20. Operating part; 30. General cable; 40. Light guide part; 50. First specification instrument. Detailed Implementation

[0032] In the following description, numerous details are provided to enable a thorough understanding of the invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the invention, and that the invention can be practiced without one or more of these details. Furthermore, to avoid obscuring the invention, some technical features well-known in the art have not been described in detail.

[0033] According to one aspect of the present invention, a tip portion of an endoscope is provided. Therefore, according to another aspect of the present invention, an endoscope is provided that may include any of the tip portions described below. The endoscope and its tip portion provided by the present invention will now be described in detail with reference to the accompanying drawings.

[0034] See Figures 1-7 An endoscope typically includes an insertion section 10, an operation section 20, a universal cable 30, and a light guide section 40 connected in sequence.

[0035] The insertion section 10 typically includes an instrument channel, one end of which extends to the operating section 20, where an instrument channel inlet is formed, and the other end extends to the tip section 100 (described later), where an instrument channel outlet 113 is formed. Thus, a medical device can be inserted from the instrument channel inlet on the operating section 20 side and then extended from the instrument channel outlet 113 on the tip section 100 side. The operator can manipulate the medical device on the operating section 20 side and utilize the end of the medical device extending from the tip section 100 for auxiliary diagnosis or treatment. The end of the medical device extending from the tip section 100 can be supported by a lifting forceps seat 120 (described later). The medical device can be of various forms; for example, in endoscopic retrograde cholangiopancreatography (ERCP), the medical device can include, but is not limited to, cannulas, guidewires, and nipple cutters.

[0036] The insertion portion 10 typically includes a tip 100. The tip 100 may accommodate components essential for endoscopic imaging, for example, see [link to relevant documentation]. Figure 2 The head end 100 may house an optical imaging component 130, which may include an illumination window 131 and a camera 132. Typically, the head end 100 is rigid.

[0037] The medical system may include a light source device and a main unit. The light guide 40 may be connected to the light source device and, through the light source device, to the main unit; alternatively, the light guide 40 may be connected to both the light source device and the main unit separately. The illumination light generated by the light source device can be transmitted through a light guide medium passing through the light guide 40, the universal cable 30, the operating part 20, and the insertion part 10 to the illumination window 131 of the head end 100 before being emitted to illuminate the subject. The camera 132 of the head end 100 collects the light reflected from the subject, generates an optical image signal of the subject, and transmits it to the light guide 40. The light guide 40 further transmits the signal to the main unit for image processing, thereby obtaining an optical image of the subject.

[0038] It is worth noting that, Figure 1 The illustrated embodiment uses an optical endoscope as an example. In other embodiments not shown, the endoscope provided in this application can also have various other applications. For example, the endoscope provided in this application can also be applied to an ultrasonic endoscope. In this case, the endoscope may include an ultrasonic connector, and the corresponding medical system may include an ultrasonic host.

[0039] The tip end of the embodiments of the present invention will now be described in detail with reference to the accompanying drawings. For ease of description, the distal end referred to below refers to the end of the endoscope closer to the object being observed when the operator uses the endoscope; the proximal end referred to below refers to the end of the endoscope closer to the operator when the operator uses the endoscope.

[0040] See Figures 2-9 The head end portion 100 may include a head end housing 110, a lifting clamp seat 120, and a head end cap 170. The head end housing 110 protects the internal structure of the head end portion 100, as detailed in [reference needed]. Figure 6 The head cap 170 can surround the head base housing 110 to prevent the head base housing from damaging the cavity being inspected.

[0041] The headstock housing 110 may have a receiving cavity communicating with the aforementioned instrument channel outlet 113, and at least one side of this receiving cavity has an extension window 111. A lifting clamp seat 120 is rotatably disposed within the receiving cavity, and the lifting clamp seat 120 communicates with the outside through the extension window 111. The lifting clamp seat 120 is typically rotatable about its own rotating portion 126, thereby allowing the lifting clamp seat 120 to adjust the direction in which the medical device extends from the extension window 111, which may be disposed within the receiving cavity. See details. Figure 3 and Figure 4The lifting clamp seat 120 can be connected to the rotating arm 160 via the pin 150. At this time, the lifting clamp seat 120 can rotate synchronously with the rotating arm 160 around the rotating part 126. The wire rope 140 can be threaded through the insertion part 10, so that the wire rope 140 can have an operating end located at the operating part 20 and a connecting end located at the head end 100. The connecting end can be connected to the rotating arm 160. The operator can control the operating end at the operating part 20, thereby driving the lifting clamp seat 120 to rotate around the rotating part 126. When a medical device is supported on the lifting clamp seat 120, the extension angle of the medical device at the head end 100 can be changed in this way to meet the needs of diagnosis or treatment in different situations.

[0042] The clamp holder 120 may include a rotating shaft end 121 and a distal end 122. The distal end 122 of the clamp holder 120 is close to the distal end of the head end 100, and the rotating shaft end 121 of the clamp holder 120 is close to the proximal end of the head end 100. The rotating shaft end 121 of the clamp holder 120 may be located near the rotating part 126. The clamp holder 120 may be provided with a first guide surface 123 extending from the distal end 122 toward the rotating shaft end 121. The first guide surface 123 can be used to support the medical device and guide the medical device to a preset extension path or a preset retraction path. The first guide surface 123 may be a curved surface with an arc cross-section, or it may be a "V"-shaped groove formed by two planes connected by an arc surface, or it may be any other form with a guiding function. The preset extension path refers to the path that the medical device moves when it extends through the first guide surface 123, and the preset retraction path refers to the path that the medical device moves on the first guide surface 123 when it is retracted. For different application scenarios, the preset extension path or preset retraction path can be different. For example, for a duodenal endoscope, the preset extension path can be an arc with a certain curvature. The distal end 122 of the lifting forceps seat 120 can also be provided with a positioning groove 124. Similar to the first guide surface 123, the positioning groove 124 can be any form with a guiding function. The structure of the positioning groove 124 will be described in detail later with reference to specific embodiments. At least a portion of the positioning groove 124 can be formed on the first guide surface 123, so that the positioning groove 124 is also located on the aforementioned extension path or retraction path. When the medical device is extended on the preset extension path guided by the first guide surface 123, it can be moved from the first guide surface 123 to the positioning groove 124. The positioning groove 124 can be used to position the medical device located on the extension path or the retraction path. The positioning groove 124 positions the medical device by exerting a clamping force on it; alternatively, it can be achieved by extending the groove along an arc, forcing deformation of the portion of the medical device located within it. Since medical devices generally tend to maintain a straight line, this increases the force on the contact surface between the medical device and the positioning groove 124. Understandably, when the positioning groove 124 positions the medical device, there will be a significant force on the contact surface, increasing friction. The process of retracting the medical device along a preset retraction path is similar to extending it along a preset extension path and will not be elaborated further.

[0043] It is understood that the medical device may include a first-specification device 50 with a smaller cross-sectional diameter and a second-specification device with a larger cross-sectional diameter. For example, the first-specification device 50 may be a guidewire, and the second-specification device may be a cannula or a nipple cutter, etc. Because the first-specification device is smaller in size, there are more structures that can be embedded in the positioning groove 124. Therefore, the holding force of the positioning groove 124 on the first-specification device is greater than the holding force of the positioning groove 124 on the second-specification device. However, since the rigidity of the second-specification device is usually greater than that of the first-specification device, even if the holding force formed by the positioning groove 124 on the second-specification device is smaller, the second-specification device is not prone to instability under the positioning of the positioning groove 124.

[0044] Further, see Figure 8 and Figure 9 An abutment portion 112 may be provided on the edge of the protruding window 111, and an abutment position corresponding to the abutment portion 112 may be provided on the first guide surface 123. When the clamp seat 120 is raised to a preset angle, the abutment position cooperates with the abutment portion 112 to clamp and fix the medical device supported by the first guide surface 123. See details. Figure 9 The abutment position can be located outside the positioning groove 124, and along the extending direction of the first guide surface 123, the abutment position can be closer to the rotating shaft end 121 relative to the positioning groove 124. When no medical device is supported on the lifting clamp seat 120, lifting the lifting clamp seat 120 allows the first guide surface 123 to abut against the abutment portion 112, and the abutment position is on the first guide surface 123; when a medical device is supported on the lifting clamp seat 120, lifting the lifting clamp seat 120 allows the first guide surface 123 to cooperate with the abutment portion 112 to clamp and fix the medical device, that is, to mechanically clamp the medical device between the abutment position on the first guide surface 123 and the abutment portion 112.

[0045] Depending on the different angles at which the lifting clamp 120 is raised, the lifting clamp 120 can be in different states. See also Figure 5 The lifting jaw 120 is in its initial state, meaning it can be assumed that the lifting jaw 120 has not yet been lifted. See also... Figure 6 and Figure 7When the forceps holder 120 is in a semi-locked state, it is raised at a certain angle, and the medical device is positioned between the positioning groove 124 and the abutment part 112. Because the forceps holder 120 is raised at this angle, the medical device undergoes a certain degree of deformation, resulting in greater friction between the positioning groove 124 and the medical device than when the forceps holder 120 is in its initial state. It is understandable that when the forceps holder 120 is in the semi-locked state, the first guide surface 123 does not abut against the abutment part 112, but the medical device can still contact the abutment part 112 and undergo partial deformation under its influence. However, the force exerted by the abutment part 112 on the medical device has not yet reached its maximum value and is insufficient to lock the medical device. When the forceps holder 120 is in the semi-locked state, the force restricting the movement of the medical device still primarily comes from the friction between the positioning groove 124 and the medical device. See also... Figure 8 and Figure 9 When the lifting clamp 120 is in a mechanically locked state, it is fully raised, supporting a medical device. The medical device is clamped between the first guide surface 123 and the abutment portion 112. The abutment position is on the first guide surface 123, and there is a gap S between the abutment position and the positioning groove 124. When the lifting clamp 120 is in the mechanically locked state, the abutment portion 112, together with the first guide surface 123, locks the medical device. At this time, the force restricting the movement of the medical device includes not only the frictional force on the contact surface between the positioning groove 124 and the medical device, but also the clamping force of the abutment portion 112 and the first guide surface 123 on the medical device. It is worth noting that the gap S here can be 0, that is, the abutment position can contact the positioning groove 124, but the abutment position is still outside the positioning groove 124.

[0046] The endoscope provided in this application will be described below with reference to the accompanying drawings, taking endoscopic retrograde cholangiopancreatography as an example.

[0047] First, the cannula is inserted through the instrument channel. The lifting clamp 120 supports the end of the cannula extending from the tip 100. By lifting the lifting clamp 120, the direction of the cannula extending from the extension window 111 can be adjusted, allowing the cannula to reach the appropriate position within the patient's body. Then, a guidewire is inserted into the cannula's channel, allowing it to reach the appropriate position within the patient's body. Subsequently, the cannula is withdrawn. When the distal end of the cannula is pulled back onto the lifting clamp 120, the guidewire, originally in the cannula's channel, falls into the positioning groove 124. The positioning groove 124 positions the guidewire; that is, the friction between the positioning groove 124 and the guidewire prevents the guidewire from changing position. Further withdrawing the distal end of the cannula into the instrument channel outlet 113, the guidewire falls into the first guide surface 123. At this point, lifting the clamp seat 120 allows the abutment portion 112 to engage with the first guide surface 123 to clamp the guidewire, placing it in a mechanically locked state. Continuing to withdraw the cannula, as it returns to the instrument channel entrance, although the friction between the cannula and guidewire causes a tendency for the guidewire to retract, the locking effect formed by the abutment portion 112 and the first guide surface 123 clamping the guidewire, along with the positioning groove 124, ensures the guidewire remains stably in place. After the cannula is fully retracted, the nipple cutting blade can be pushed along the guidewire. When the distal end of the nipple cutting blade reaches the instrument channel outlet 113 and is significantly obstructed, the lifting angle of the lifting clamp seat 120 can be reduced to put the lifting clamp seat 120 in a semi-locked state. At this time, the guide wire and the first guide surface 123 are spaced apart from the abutment portion 112, thus creating space for the nipple cutting blade to continue being pushed. When the lifting clamp seat 120 is in the semi-locked state, the positioning groove 124 still provides positioning for the guide wire, keeping the guide wire's position unchanged. Finally, the nipple cutting blade is pushed further so that it can reach the appropriate position within the patient's body along the guide wire to participate in diagnosis or treatment.

[0048] It is understood that the above description is only based on endoscopic retrograde cholangiopancreatography (ERCP) as an example. Medical devices can be of various forms, and the use of the endoscope tip provided by this invention is not specifically limited here.

[0049] The head end provided by the present invention has an abutment portion 112 that can clamp the medical device together with the first guide surface 123, so that the medical device is mechanically locked and the position of the medical device will not change; the positioning groove 124 can be used to position the medical device located on the extension path or the retraction path, and there can be a large friction between the medical device and the positioning groove 124, so that the medical device is not easy to sway left and right. Specifically, during the entire process of replacing medical devices, such as when the cannula is retracted along the guidewire in the instrument channel and when the nipple cutter is extended along the guidewire in the instrument channel, the abutment part 112 can clamp the guidewire together with the first guide surface 123, so that the guidewire is mechanically locked and its position will not change. However, before the farthest end of the cannula is retracted to the abutment position (i.e., the mechanically locked position of the guidewire) or after the farthest end of the nipple cutter is extended to the abutment position (i.e., the mechanically locked position of the guidewire), although the cannula or the nipple cutter is sleeved on the guidewire so that the abutment part 112 cannot mechanically lock the guidewire together with the first guide surface 123, the large friction between the positioning groove 124 and the guidewire can form a radial constraint on the guidewire, so that the radial position of the guidewire will not shift. As can be seen, the lifting clamp seat 120 of the present invention has a mechanically locked state and a semi-locked state. When changing medical instruments along the guide wire, whether during the exchange of medical instruments on the lifting clamp seat 120 or during the movement of the medical instruments within the instrument channel, the position of the guide wire remains stable. This makes it simpler and more convenient for the operator to use such an endoscope. In addition, in the present invention, the abutment position for mechanically locking the medical instrument is on the first guide surface 123 and located outside the positioning groove. The shape of the surface is relatively regular, which allows the guide wire to be subjected to more uniform force, reducing the impact of stress concentration and making it less likely to damage the medical instrument. This avoids the need to replace the medical instrument due to damage during use, making the endoscope more stable during use and improving the operator's experience.

[0050] In one embodiment of the present invention, see Figures 2-5 The clamp holder 120 may also be provided with two second guide surfaces 125, and a first guide surface 123 may be formed between the two second guide surfaces 125. The two second guide surfaces 125 can be used to guide the medical device into the first guide surface 123. This ensures that the medical device always tends to remain on the first guide surface 123 when retracting or extending. That is, if the medical device deviates from the first guide surface 123 when extending or retracting, after the external force is removed, the medical device will eventually be located on the first guide surface 123 under the guidance of the second guide surfaces 125, and move along a predetermined extension path or a predetermined retraction path under the guidance of the first guide surface 123.

[0051] In one embodiment of the present invention, see Figures 5-9The abutment portion 112 may have an abutment surface 1121, which may be an arc-shaped surface. The abutment portion 112 can clamp and fix the medical device supported by the first guide surface 123 by engaging the abutment surface 1121 with the abutment position. The abutment portion 112 abuts against the medical device through the arc-shaped abutment surface 1121, which can further reduce the impact of stress concentration and further ensure that the medical device will not be damaged when the abutment portion 112 abuts against the medical device.

[0052] For example, when the forceps holder 120 is raised to the aforementioned preset angle, the projection of the abutment surface 1121 on the forceps holder 120 can be covered by the first guide surface 123. This ensures that the abutment position is on the first guide surface 123. Moreover, when two second guide surfaces 125 are provided on the forceps holder 120, the abutment portion 112 abuts against the medical device, and the abutment portion 112 will not contact the second guide surface 125.

[0053] In one embodiment of the present invention, see Figures 2-5 The distal end 122 of the lifting clamp holder 120 may have a positioning groove outlet 1241. A positioning groove 124 can be formed by extending from the positioning groove outlet 1241 along a predetermined route toward the rotating shaft end 121. The medical device may include a first-specification device 50, the diameter of which is less than or equal to a preset value, and at least half of the first-specification device 50 can be accommodated within the positioning groove outlet 1241. The positioning groove outlet 1241 is the protrusion of the medical device (especially the first-specification device 50) on the lifting clamp holder 120. When at least half of the first-specification device 50 can be accommodated within the positioning groove outlet 1241, the positioning groove outlet 1241 can provide radial constraint for the first-specification device 50, thereby preventing the first-specification device 50 from wobbling in the radial direction and improving the stability of the guidewire.

[0054] For example, when the lifting clamp seat 120 is lifted to a preset angle, in conjunction with [see reference 1] Figures 9-12The abutment position and the abutment part 112 cooperate to clamp and fix the first-specification instrument 50 supported by the first guide surface 123. At least half of the first-specification instrument 50 can be located within the positioning groove outlet 1241. At this time, the lifting forceps seat 120 is in a mechanically locked state, and at least half of the first-specification instrument 50 is located within the positioning groove outlet 1241. That is to say, there is a large frictional force between the first-specification instrument 50 and the positioning groove 124, which reduces the force required for the abutment part 112 to cooperate with the first guide surface 123 to clamp the first-specification instrument 50. Moreover, the part of the first-specification instrument 50 located further from the contact position with the abutment part 112 is more stably fixed due to the limitation of frictional force. Furthermore, after reducing the lifting angle of the lifting forceps seat 120 to form space for the medical device to be replaced to pass through, the first-specification instrument 50, such as the guide wire, is always positioned within the positioning groove outlet 1241 and will not become unstable.

[0055] For example, the positioning slot outlet 1241 can be any suitable form of opening. See also, for example, a detailed description. Figure 12 The cross-section of the positioning groove outlet 1241 can be perpendicular to the aforementioned predetermined route. The cross-section of the positioning groove outlet 1241 can be V-shaped overall. It is worth noting that the "V" shape mentioned here only describes the approximate shape of the cross-section of the positioning groove outlet 1241, and is not strictly limited to a "V" shape. For example, the cross-section of the positioning groove outlet 1241 can be a "V" shape with an arc perimeter, a "V" shape with rounded corners, or a "V" shape formed by any combination of various other forms. Such a positioning groove outlet 1241 can provide radial constraint on the medical device, for example, it can prevent the medical device from deviating in other directions perpendicular to the extension path, and it can be adapted to a variety of different sizes of medical devices. For the first specification device 50 with a smaller cross-sectional diameter, a variety of first specification devices 50 of different sizes can be accommodated in different positions of the positioning groove outlet 1241, while for the second specification device with a larger cross-sectional diameter, the cross-section of the positioning groove outlet 1241 is "V" shaped, and the two side edges of the "V" shape can provide support and a certain degree of radial constraint for the second specification device.

[0056] For example, the first guide surface 123 may extend along the length axis LL of the clamp holder 120, and the predetermined path may intersect the length axis LL of the clamp holder 120. The predetermined path may be in various forms, such as arc, curve, or polyline. It can be considered that the predetermined path describes the extension trend of the positioning groove 124, but it does not limit how the size of the positioning groove 124 changes along the predetermined path in the direction perpendicular to the predetermined path. The predetermined path may be inclined to the length axis LL of the clamp holder 120, so the distance between the predetermined path and the length axis LL of the clamp holder 120 may gradually decrease and then gradually increase from the distal end 122 to the rotating shaft end 121, thereby forming a similar intersecting form between the predetermined path and the length axis LL of the clamp holder 120. Such a positioning groove 124 can force the medical device located therein to undergo greater deformation, thereby further increasing the friction on the contact surface between the medical device and the positioning groove 124. Such a positioning groove 124 has a better positioning effect on the medical device. When at least part of the medical device is located in the positioning groove 124, the medical device can maintain its position more stably.

[0057] As previously described, the head end portion 100 may include an optical imaging component 130, which may have an imaging area and can generate an optical image of the subject within that imaging area. Exemplarily, the optical imaging component 130 and the protruding window 111 may be located on the same side of the head end portion 100, and the predetermined path may be inclined towards the center of the imaging area of ​​the optical imaging component 130. After the positioning groove 124 positions the medical device, the portion of the medical device extending from the distal end of the lifting forceps seat 120 can reach the imaging area of ​​the optical imaging component 130. This reduces blind spots when operating the medical device. When the operator operates the medical device and controls the portion extending from the protruding window 111 to assist in diagnosis or treatment, they can use the real-time imaging of the optical imaging component 130 to observe the position of the distal end of the medical device, thus improving the effectiveness of diagnosis or treatment.

[0058] For example, the opening size of the positioning groove 124 perpendicular to the predetermined path can gradually decrease from the distal end 122 toward the rotating shaft end 121. On the plane where the first guide surface 123 is located, the positioning groove 124 is generally "V" shaped. Such a positioning groove 124 can facilitate a smooth transition of medical devices between the first guide surface 123 and the positioning groove 124, and can be adapted to medical devices of various sizes, thus broadening the applicability of endoscopes.

[0059] For example, see Figure 8 and Figure 9The first guide surface 123 can extend along the length axis LL of the forceps holder 120, and there can be a gap S between the abutment position and the positioning groove 124. When the overall orientation of the positioning groove 124 and the overall orientation of the first guide surface 123 are relatively inclined, the medical device extends from the first guide surface 123 to the positioning groove 124. Due to the angle change, if the angle change is too large, the medical device may undergo a large deformation, which may cause the medical device to generate a large reaction force and detach from the positioning groove 124. When the medical device extends along the predetermined extension path, it can be considered that the medical device extends approximately along the length axis LL of the forceps holder 120. The medical device passes through the gap S after the abutment position before reaching the positioning groove 124, which provides a certain amount of space for the orientation adjustment of the medical device. This prevents the medical device from detaching from the positioning groove 124 due to excessive deformation when mechanically locked, and thus from deviating from the preset extension path or retraction path. When such an endoscope is equipped with a medical device, it is easier to extend the distal end of the medical device to the appropriate position, and the effect of the endoscope in diagnosis or treatment is better.

[0060] In one embodiment of the present invention, see Figure 10 The extension path can include a first extension path (path AA in the diagram) and a second extension path (path BB in the diagram). The retraction path can include a first retraction path and a second retraction path. The first guide surface 123 can be used to guide the first-specification instrument 50 onto the first extension path AA or the first retraction path. The positioning groove 124 can be used to guide the first-specification instrument 50 located on the first extension path AA to the second extension path BB or to guide the first-specification instrument 50 located on the second retraction path to the first retraction path. The positioning groove 124 can not only position the first-specification instrument 50 but also guide it. Taking the extension path as an example, by designing the positioning groove 124 in a suitable form, the positioning groove 124 can not only force the first-specification instrument 50 located therein to deform, thereby increasing the friction on the contact surface between the positioning groove 124 and the first-specification instrument 50, but also allow the distal end of the first-specification instrument 50 to face the appropriate position after deformation. When such a head end carries the first-specification instrument 50, the position of the first-specification instrument 50 within the subject can be more accurate. The pullback path is similar to the extension path and will not be described in detail here. For example, see... Figure 10The predetermined path (i.e., the second extension path or the second retraction path) and the central axis of the first guide surface 123 (i.e., the first extension path or the first retraction path) together define an inscribed circle passing through the positioning groove outlet 1241 and the abutment position (the arc CC in the illustration is a part of this inscribed circle, and CC in the illustration represents the inscribed circle). The diameter of the inscribed circle CC is greater than the minimum bending diameter of the first specification instrument 50. The minimum bending diameter of the first specification instrument 50 refers to the smallest diameter that the first specification instrument 50 can form within the elastic bending range. When the first specification instrument 50 bends to a diameter smaller than the minimum bending diameter, the first specification instrument 50 will undergo irreversible bending. When the first-specification instrument 50 is mounted on the head end, the deformation of the first-specification instrument 50 under the positioning groove 124 will be elastic bending. This can prevent the first-specification instrument 50 from becoming unstable or irreversibly bent, thereby avoiding the need to replace the first-specification instrument 50 due to damage during use of the endoscope, and also preventing the first-specification instrument 50 from falling out of the positioning groove 124 due to excessive deformation, thus improving the user experience of the operator.

[0061] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front", "rear", "up", "down", "left", "right", "horizontal", "vertical", "horizontal", "top", and "bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0062] For ease of description, relative terms such as "above," "over," "on the upper surface of," and "above" are used here to describe the regional positional relationship of one or more components or features shown in the figures to other components or features. It should be understood that relative terms include not only the orientation of the component as depicted in the figure but also different orientations during use or operation. For example, if the components in the figures are inverted as a whole, "above" or "above other components or features" will include cases where the component is "below" or "under" other components or features. Thus, the exemplary term "above" can include both "above" and "below." Furthermore, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document intends to include all such cases.

[0063] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0064] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0065] The present invention has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, those skilled in the art will understand that the present invention is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of the present invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. The tip of an endoscope, characterized in that, include: A headpiece housing, wherein a receiving cavity is provided on the headpiece housing, the receiving cavity communicating with the instrument channel of the endoscope and forming an extension window for the medical instrument to extend out, and an abutment portion is provided on the edge of the extension window; and A lifting clamp holder, rotatably disposed within the receiving cavity, is used to adjust the direction of the medical device extending from the extension window. The lifting clamp holder includes a rotating shaft end and a distal end. The lifting clamp seat is provided with a first guide surface extending from the distal end toward the rotating shaft end. The first guide surface is used to support the medical device and guide the medical device to a preset extension path or a preset retraction path. The first guide surface has an abutment position corresponding to the abutment part. When the lifting clamp seat is lifted to a preset angle, the abutment position cooperates with the abutment part to mechanically clamp the medical device supported by the first guide surface. The distal end of the lifting clamp seat is further provided with a positioning groove, at least a portion of which is formed on the first guide surface. The positioning groove is used to position the medical device located on the extension path or the retraction path. Wherein, the abutting position is located outside the positioning groove, and there is a gap between the abutting position and the positioning groove; The distal end of the lifting forceps has a positioning groove outlet, and the positioning groove extends from the positioning groove outlet along a predetermined route toward the rotating shaft end to form the positioning groove; the medical device includes a first-size device, the diameter of the first-size device is less than or equal to a preset value, and at least half of the first-size device can be accommodated in the positioning groove outlet; when the medical device supported by the first guide surface is the first-size device, and the lifting forceps is lifted to the preset angle, at least half of the first-size device is located in the positioning groove outlet.

2. The head end portion according to claim 1, characterized in that, The cross-section of the positioning groove outlet is V-shaped and perpendicular to the predetermined route.

3. The head end portion according to claim 1, characterized in that, The opening size of the positioning groove, perpendicular to the predetermined path, gradually decreases from the distal end toward the rotating shaft end.

4. The head end portion according to any one of claims 1-3, characterized in that, The first guide surface extends along the length axis of the lifting clamp seat, and the predetermined path intersects the length axis of the lifting clamp seat.

5. The head end portion according to claim 4, characterized in that, The predetermined route and the central axis of the first guide surface together define an inscribed circle passing through the outlet of the positioning groove and the abutment position, the diameter of which is greater than the minimum bending diameter of the first specification instrument.

6. The head end portion according to claim 4, characterized in that, It also includes an optical imaging assembly, which and the protruding window are located on the same side of the head end housing, and the predetermined path is inclined toward the center of the imaging area of ​​the optical imaging assembly.

7. An endoscope, characterized in that, Includes the head end as described in any one of claims 1-6.

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