Endoscope and head end thereof

Abstract

The utility model provides an endoscope and a head end part thereof. The head end part comprises a head end seat shell and a forceps lifting seat, a containing cavity is formed in the head end seat shell, the containing cavity is communicated with an instrument channel of the endoscope and forms an extending window for extending out of a medical instrument, and an abutting part is arranged on the edge of the extending window; a first guide face extending from the far end to the end of the rotating shaft is arranged on the forceps lifting seat, the first guide face is used for supporting the medical instrument and guiding the medical instrument to a preset path, the first guide face is provided with an abutting position corresponding to the abutting portion, and when the forceps lifting seat is lifted to a preset angle, the abutting portion is located on the first guide face. The abutting position is matched with the abutting part to clamp and fix the medical instrument supported by the first guide surface; a positioning groove is further formed in the far end of the forceps lifting seat, at least part of the positioning groove is formed in the first guide face, the positioning groove is used for positioning the medical instrument located on a preset path, and the abutting position is located outside the positioning groove. Based on the scheme, the convenience of instrument replacement can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to an endoscope and a head end thereof. Background Art

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

[0003] The part of the endoscope that enters the human body is an elongated insertion part, and an instrument channel is usually provided in the insertion part. When the endoscope is used for diagnosis or treatment, the medical device can be passed through the instrument channel to reach the distal end of the endoscope to assist in diagnosis or treatment. In order to allow the medical device to reach a suitable position after extending out of the instrument channel, a guide wire can be used to guide the medical device. The guide wire can be delivered to a specified position using a cannula. The specific method of use is to first allow the cannula to pass through the instrument channel and reach a predetermined position in the human body, then insert a guide wire into the cannula channel, so that the guide wire also reaches the predetermined position, and then the cannula is pulled out, and other medical devices such as a nipple cutter can follow the guide wire to reach the predetermined position in the human body. However, when the cannula is pulled out or the nipple cutter is pushed, the guide wire is prone to change position due to the friction between the guide wire and the cannula or the friction between the guide wire and the nipple cutter. Therefore, during the process of the doctor pulling out the cannula and inserting the nipple cutter, a nurse is usually required to assist in holding the guide wire and cooperate with the doctor's operation to apply a force on the guide wire opposite to the friction force generated, and at the same time, prevent the guide wire from shaking left and right to try to maintain the insertion position of the guide wire unchanged. This process is time-consuming and laborious. Utility Model Content

[0004] In order to at least partially solve the problems existing in the prior art, according to one aspect of the utility model, a head end portion of an endoscope is provided. The head end portion includes a head end seat shell and a lifting clamp seat. A accommodating cavity is provided on the head end seat shell, which is connected to the instrument channel of the endoscope and forms an extension window for the medical device to extend out, and an abutment portion is provided on the edge of the extension window; the lifting forceps seat is rotatably arranged in the accommodating cavity, and is used for adjusting the direction in which the medical device extends out from the extension window, the lifting forceps seat includes a rotating shaft end and a distal end, and a first guide surface extending from the distal end toward the rotating shaft end is provided on the lifting forceps seat, the first guide surface is used for supporting the medical device and guiding the medical device to a preset extension path or a preset withdrawal path, and the first guide surface has an abutment position corresponding to the abutment portion, and when the lifting forceps seat is lifted 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 forceps seat, and at least a part of the positioning groove is formed on the first guide surface, and the positioning groove is used for positioning the medical device located on the extension path or on the withdrawal path, wherein the abutment position is located outside the positioning groove.

[0005] The head end portion provided by the utility model and the abutment portion can clamp the medical device together with the first guide surface, so that the medical device is mechanically locked, and the position of the medical device will not change; 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, so that the medical device is not easy to shake left and right. Specifically, during the entire process of replacing the medical device, for example, during the process of retracting the cannula along the guide wire in the instrument channel and during the process of extending the nipple cutter along the guide wire in the instrument channel, the abutment portion can clamp the guide wire together with the first guide surface, so that the guide wire is mechanically locked, and the position of the guide wire will not change; and before the farthest end of the cannula is retracted to the abutment position (i.e., the mechanical locking position of the guide wire) or after the farthest end of the nipple cutter is extended to the abutment position (i.e., the mechanical locking position of the guide wire), although the cannula or the nipple cutter is sleeved on the guide wire so that the abutment portion cannot form a mechanical lock on the guide wire together with the first guide surface at this time, due to the large friction between the positioning groove and the guide wire, a radial constraint can be formed on the guide wire, so that the radial position of the guide wire will not be offset. It can be seen that the lifting forceps seat of the utility model has a mechanical locking state and a semi-locking state. When the medical device is replaced along the guide wire, whether it is the process of exchanging medical devices on the lifting forceps seat or the process of moving the medical device in the device channel, the position of the guide wire can be kept stable and unchanged, and the operator can use such an endoscope more simply and conveniently. In addition, in the utility model, the abutment position for mechanically locking the medical device is on the first guide surface and outside the positioning groove. The shape of the surface is relatively regular, which can make the guide wire more evenly stressed, reduce the impact of stress concentration, and is not easy to damage the medical device, thereby avoiding the replacement of the medical device due to damage to the medical device during use of the endoscope. The endoscope is more stable when in use, which improves the operator's experience.

[0006] Exemplarily, a positioning groove outlet is provided on the distal end of the lifting forceps seat, and a positioning groove is formed by extending from the positioning groove outlet along a predetermined route toward the rotating shaft end; the medical device includes a first specification device, the diameter of the first specification device is less than or equal to a preset value, and at least half of the first specification device can be accommodated in the positioning groove outlet.

[0007] Exemplarily, when the medical device supported by the first guide surface is a first-specification device and the forceps lifting seat is lifted to a preset angle, at least half of the first-specification device is located in the exit of the positioning groove.

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

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

[0010] Exemplarily, the first guide surface extends along the longitudinal axis of the lifting clamp seat, and the predetermined route intersects with the longitudinal axis of the lifting clamp seat.

[0011] Exemplarily, there is a gap between the abutting position and the positioning groove.

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

[0013] Exemplarily, the head end also includes an optical imaging assembly, the optical imaging assembly and the extension window are located on the same side of the head end base shell, and the predetermined route is inclined toward the center of the imaging area of ​​the optical imaging assembly.

[0014] According to another aspect of the utility model, an endoscope is provided, which includes any head end portion as described above.

[0015] A series of simplified concepts are introduced in the utility model content, which will be further described in detail in the detailed implementation section. The utility model content section does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0016] The advantages and features of the present invention are described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the implementation of the present invention and its description, and are used to explain the principle of the present invention. In the drawings,

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

[0019] Figure 2 It is a partial stereoscopic view of the structure near the head end of an endoscope according to an exemplary embodiment of the utility model;

[0020] Figure 3 for Figure 2 A partial stereoscopic view of the lifting forceps seat and its surrounding structures in the endoscope shown;

[0021] Figure 4 for Figure 3 An exploded view of the lifting clamp seat and its surrounding structures is shown;

[0022] Figure 5It is a partial stereoscopic view of the structure of an endoscope near the head end according to an exemplary embodiment of the utility model, wherein a medical device is supported on the lifting clamp seat, and the lifting clamp seat is in an initial state;

[0023] Figure 6 It is a partial stereoscopic view of the structure of an endoscope near the head end according to an exemplary embodiment of the utility model, wherein a medical device is supported on the lifting clamp seat, and the lifting clamp seat is in a semi-locked state;

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

[0025] Figure 8 It is a partial stereoscopic view of the structure of an endoscope near the head end according to an exemplary embodiment of the utility model, wherein a medical device is supported on the lifting clamp seat, and the lifting clamp seat is in a mechanically locked state;

[0026] Fig. 9 for Figure 8 A cross-sectional view of the structure near the tip end of the endoscope shown;

[0027] Fig.10 It is a three-dimensional view of a forceps lifting seat according to an exemplary embodiment of the utility model observed from a perspective parallel to the extension window, wherein a medical device is supported on the forceps lifting seat, and the forceps lifting seat is in a mechanically locked state;

[0028] Fig.11 A partial stereoscopic view of the structure of an endoscope near the head end according to an exemplary embodiment of the utility model, wherein a medical device is supported on the lifting forceps seat, and the lifting forceps seat is in a mechanically locked state; and

[0029] Fig.12 for Fig.11 A partial enlarged view of the structure of the endoscope near the tip end is shown.

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

[0031] 10. Insertion portion; 100. Head end portion; 110. Head end seat shell; 111. Extension window; 112. Abutment portion; 1121. Abutment surface; 113. Instrument channel outlet; 120. Lifting forceps seat; 121. Rotation shaft end; 122. Distal end; 123. First guide surface; 124. Positioning groove; 1241. Positioning groove outlet; 125. Second guide surface; 126. Rotating portion; 130. Optical imaging component; 131. Illumination window; 132. Camera; 140. Wire rope; 150. Pin; 160. Rotating arm; 170. Head end cap; 20. Operating portion; 30. Universal cable; 40. Light guide portion; 50. First specification instrument. DETAILED DESCRIPTION

[0032] In the following description, a large number of details are provided so that the present invention can be thoroughly understood. However, it will be appreciated by those skilled in the art that the following description only illustrates preferred embodiments of the present invention, and the present invention can be implemented without one or more of such details. In addition, in order to avoid confusion with the present invention, some technical features known in the art are not described in detail.

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

[0034] See also Figure 1-Figure 7 An endoscope may generally include an insertion portion 10, an operation portion 20, a universal cable 30, and a light guide portion 40 which are connected in sequence.

[0035] The insertion portion 10 may generally include an instrument channel, one end of which extends to the operating portion 20 and is provided with an instrument channel entrance, and the other end of which extends to the head portion 100 described later and is provided with an instrument channel exit 113 at the head portion 100. In this way, a medical device can be inserted from the instrument channel entrance on the operating portion 20 side and then extended from the instrument channel exit 113 on the head portion 100 side. An operator can operate the medical device on the operating portion 20 side and use the end of the medical device extending at the head portion 100 for auxiliary diagnosis or treatment. The end of the medical device extending at the head portion 100 can be supported by a forceps lifting seat 120 described later. The medical device can be in various forms. For example, in endoscopic retrograde pancreatocholangiopancreatography, the medical device can include but is not limited to a cannula, a guide wire, and a papillary cutter.

[0036] The insertion portion 10 may generally include a head end portion 100. The head end portion 100 may accommodate components that are essential for endoscopic imaging, for example, Figure 2 The head end portion 100 may contain an optical imaging component 130, and the optical imaging component 130 may include an illumination window 131 and a camera 132. Generally, the head end portion 100 is hard.

[0037] The medical system may include a light source device and a host. The light guide portion 40 may be connected to the light source device and connected to the host through the light source device, or the light guide portion 40 may be connected to the light source device and the host respectively. The irradiation light generated by the light source device may be transmitted to the illumination window 131 of the head end portion 100 through the light guide medium passing through the light guide portion 40, the universal cable 30, the operating portion 20 and the insertion portion 10, and then emitted to illuminate the subject; after the camera 132 of the head end portion 100 collects the light returned from the subject, it generates an optical image signal of the subject and transmits it to the light guide portion 40, which is further transmitted to the host for image processing, thereby obtaining an optical image of the subject.

[0038] It is worth noting that Figure 1 The illustrated embodiment is introduced by taking an optical endoscope as an example. In other embodiments not shown, the endoscope provided by the present application may also have various other applications. For example, the endoscope provided by the present application may 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 head end of the embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings. For the convenience of description, the distal end mentioned below refers to the end of the endoscope that is closer to the object being observed when the operator uses the endoscope; the proximal end mentioned below refers to the end of the endoscope that is closer to the operator when the operator uses the endoscope.

[0040] See also Figure 2-Figure 9 The head end 100 may include a head end housing 110, a lifting clamp seat 120 and a head end cap 170. The head end housing 110 may protect the internal structure of the head end 100, see Figure 6 The head end cap 170 can surround the head end base shell 110 to prevent the head end base shell from causing damage to the cavity under inspection.

[0041] The head end housing 110 may be formed with a receiving cavity connected to the aforementioned instrument channel outlet 113, and at least one side of the receiving cavity may be formed with an extension window 111. The lifting forceps seat 120 may be rotatably disposed in the receiving cavity, and the lifting forceps seat 120 may be connected to the outside through the extension window 111. The lifting forceps seat 120 may generally rotate around its own rotating portion 126, so that the lifting forceps seat 120 may be used to adjust the direction in which the medical device extends from the extension window 111. The rotating portion 126 may be disposed in the receiving cavity. For details, see Figure 3 and Figure 4The lifting forceps seat 120 can be connected to the rotating arm 160 by the pin 150. At this time, the lifting forceps seat 120 can rotate around the rotating part 126 synchronously with the rotating arm 160. The wire rope 140 can be passed 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 forceps seat 120 to rotate around the rotating part 126. When a medical device is supported on the lifting forceps 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 lifting forceps seat 120 may include a rotating shaft end 121 and a distal end 122, wherein the distal end 122 of the lifting forceps seat 120 is close to the distal end of the head end 100, and the rotating shaft end 121 of the lifting forceps seat 120 is close to the proximal end of the head end 100, and the rotating shaft end 121 of the lifting forceps seat 120 may be located near the rotating portion 126. The lifting forceps seat 120 may be provided with a first guide surface 123 extending from the distal end 122 toward the rotating shaft end 121, and the first guide surface 123 may be used to support the medical device and guide the medical device to a preset extension path or a preset withdrawal path. The first guide surface 123 may be a curved surface with an arc cross section, or may be a "V"-shaped groove formed by connecting two planes through an arc surface, or may be any other form with a guiding function. The preset extension path refers to the path that the medical device moves when it is extended through the first guide surface 123, and the preset withdrawal path refers to the path that the medical device moves on the first guide surface 123 when the medical device is recovered. For different application scenarios, the preset extension path or the preset retraction path may be different. For example, for an endoscope for the duodenum, the preset extension path may be an arc with a certain curvature. The distal end 122 of the lifting forceps seat 120 may also be provided with a positioning groove 124. Similar to the first guide surface 123, the positioning groove 124 may be in any form with a guiding function. The structure of the positioning groove 124 will be described in detail later in conjunction with a specific embodiment. At least a portion of the positioning groove 124 may be formed on the first guide surface 123, so that the positioning groove 124 may also be located on the aforementioned extension path or retraction path. When the medical device is extended on the preset extension path under the guidance of the first guide surface 123, it may be moved from the first guide surface 123 to the positioning groove 124. The positioning groove 124 may be used to position a medical device located on the extension path or on the retraction path. The positioning of the positioning groove 124 on the medical device can be achieved by the positioning groove 124 having a certain clamping force on the medical device; or the positioning groove 124 can be extended along an arc to achieve the positioning of the medical device. Such a positioning groove 124 can force the part of the medical device located in the positioning groove 124 to deform. Since medical devices generally have a certain tendency to maintain a straight state, this can increase the force on the contact surface between the medical device and the positioning groove 124. It is understandable that when the positioning groove 124 positions the medical device, there will be a large force on the contact surface between the positioning groove 124 and the medical device, so that the friction force on the contact surface between the positioning groove 124 and the medical device will increase. When the medical device is recovered on the preset withdrawal path, it is similar to the medical device extending on the preset extension path, and will not be repeated here.

[0043] It is understandable 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 guide wire, and the second specification device may be a cannula or a nipple cutter, etc. Since the size of the first specification device is smaller, there are more structures that can be embedded in the positioning groove 124, so 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, but since the rigidity of the second specification device is generally greater than the rigidity of the first specification device, even if the holding force of 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 Fig. 9 The edge of the window 111 may be provided with an abutment portion 112, and the first guide surface 123 may have an abutment position corresponding to the abutment portion 112. When the lifting forceps seat 120 is lifted 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. Fig. 9 , the abutment position can be located outside the positioning groove 124, and, along the extension 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 forceps seat 120, the lifting forceps seat 120 is lifted, and the first guide surface 123 can 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 forceps seat 120, the lifting forceps seat 120 is lifted, and the first guide surface 123 will cooperate with the abutment portion 112 to clamp and fix the medical device, that is, the medical device is mechanically clamped between the abutment position on the first guide surface 123 and the abutment portion 112.

[0045] According to the different angles at which the jaw lifting seat 120 is lifted, the jaw lifting seat 120 can be in different states. Figure 5 , the lifting clamp seat 120 is in the initial state, and it can be considered that the lifting clamp seat 120 has not been lifted at this time. Figure 6 and Figure 7, the lifting forceps seat 120 is in a semi-locked state. At this time, the lifting forceps seat 120 is lifted to a certain angle, and the medical device is placed between the positioning groove 124 and the abutment portion 112. At this time, since the lifting forceps seat 120 is lifted to a certain angle, the medical device has been deformed to a certain extent, and the friction force on the contact surface between the positioning groove 124 and the medical device is greater than the friction force on the contact surface between the positioning groove 124 and the medical device when the lifting forceps seat 120 is in the initial state. It can be understood that when the lifting forceps seat 120 is in a semi-locked state, the first guide surface 123 does not form an abutment with the abutment portion 112, but the medical device can form a contact with the abutment portion 112 at this time, and the medical device can also be partially deformed under the action of the abutment portion 112, but the force of the abutment portion 112 on the medical device has not yet reached the maximum value, which is insufficient to lock the medical device. When the lifting forceps seat 120 is in a semi-locked state, the force that limits the movement of the medical device still mainly comes from the friction force on the contact surface between the positioning groove 124 and the medical device. See. Figure 8 and Fig. 9 , the lifting forceps seat 120 is in a mechanical locking state. At this time, the lifting forceps seat 120 is fully lifted, and a medical device is supported on the lifting forceps seat 120. 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 forceps seat 120 is in a mechanical locking state, the abutment portion 112 will lock the medical device together with the first guide surface 123. At this time, the force that limits the movement of the medical device includes not only the friction 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 be in contact with the positioning groove 124, but the abutment position is still outside the positioning groove 124.

[0046] The endoscope provided in the present application is described below by taking endoscopic retrograde cholangiopancreatography as an example in conjunction with the accompanying drawings.

[0047] First, the cannula is passed through the instrument channel. The lifting forceps seat 120 can support the end of the cannula extending from the head end 100. By lifting the lifting forceps seat 120, the direction in which the cannula extends from the extension window 111 can be adjusted, so that the cannula can reach the appropriate position in the subject. Then a guide wire can be inserted into the cannula channel, so that the guide wire can reach the appropriate position in the subject along the cannula channel. The cannula can then be pulled out. When the farthest end of the cannula is pulled back onto the lifting forceps seat 120, the guide wire originally located in the cannula channel will fall into the positioning groove 124. The positioning groove 124 can position the guide wire. That is to say, at this time, under the action of the friction force on the contact surface between the positioning groove 124 and the guide wire, the position of the guide wire will not change. The farthest end of the cannula is further withdrawn into the instrument channel outlet 113, and the guide wire falls into the first guide surface 123. At this time, the lifting clamp seat 120 is lifted, so that the abutment portion 112 and the first guide surface 123 cooperate to clamp the guide wire, so that the guide wire is in a mechanical locking state. The cannula is continuously withdrawn. In the process of the cannula returning to the instrument channel entrance, although the friction between the cannula and the guide wire makes the guide wire tend to withdraw, the locking effect formed by the abutment portion 112 and the first guide surface 123 cooperating to clamp the guide wire and the positioning effect of the positioning groove 124 on the guide wire enable the guide wire to stably maintain its position. After the cannula is completely recovered, the nipple cutter can be pushed along the guide wire. When the farthest end of the nipple cutter reaches the instrument channel outlet 113 and is obviously blocked, the lifting angle of the lifting forceps seat 120 can be reduced to make the lifting forceps 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 avoiding a space for continuing to push the nipple cutter. When the lifting forceps seat 120 is in a semi-locked state, the positioning groove 124 still forms a positioning effect on the guide wire so that the position of the guide wire remains unchanged. Finally, the nipple cutter is continued to be pushed so that the nipple cutter can follow the guide wire to the appropriate position in the subject's body to participate in diagnosis or treatment.

[0048] It is understandable that the above content is only described by taking endoscopic retrograde cholangiopancreatography as an example, and the medical device can be in various forms, and the use process of the head end of the endoscope provided by the utility model is not specifically limited here.

[0049] The head end portion provided by the utility model, the abutment portion 112 can clamp the medical device together with the first guide surface 123, so that the medical device is mechanically locked, so that 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 force between the medical device and the positioning groove 124, so that the medical device is not easy to shake left and right. Specifically, during the entire process of replacing the medical device, for example, during the process of withdrawing the cannula along the guide wire in the instrument channel and during the process of extending the nipple cutter along the guide wire in the instrument channel, the abutment portion 112 can clamp the guide wire together with the first guide surface 123, so that the guide wire is mechanically locked, and the position of the guide wire will not change; and before the farthest end of the cannula is withdrawn to the abutment position (i.e., the mechanical locking position of the guide wire) or after the farthest end of the nipple cutter is extended to the abutment position (i.e., the mechanical locking position of the guide wire), although the cannula or the nipple cutter is sleeved on the guide wire so that the abutment portion 112 cannot form a mechanical lock on the guide wire together with the first guide surface 123 at this time, due to the large friction between the positioning groove 124 and the guide wire, a radial constraint can be formed on the guide wire, so that the radial position of the guide wire will not be offset. It can be seen that the lifting forceps seat 120 of the utility model has a mechanical locking state and a semi-locking state. When the medical device is replaced along the guide wire, whether it is the process of exchanging medical devices on the lifting forceps seat 120 or the process of moving the medical device in the device channel, the position of the guide wire can be kept stable and unchanged, and the operator can use such an endoscope more simply and conveniently. In addition, in the utility model, the abutment position for mechanically locking the medical device is on the first guide surface 123 and is located outside the positioning groove. The shape of the surface is relatively regular, which can make the guide wire more evenly stressed, reduce the impact of stress concentration, and is not easy to damage the medical device, thereby avoiding the replacement of the medical device due to damage to the medical device during use of the endoscope. The endoscope is more stable during use, which improves the operator's experience.

[0050] In one embodiment of the present invention, see Figure 2-Figure 5 , two second guide surfaces 125 may also be provided on the forceps lifting seat 120, and the first guide surface 123 may be formed between the two second guide surfaces 125. The two second guide surfaces 125 may be used to guide the medical device into the first guide surface 123. The medical device always tends to remain on the first guide surface 123 when it is retracted or extended. In other words, if the medical device deviates from the first guide surface 123 when it is extended or retracted, 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 surface 125, and move on the predetermined extension path or the predetermined withdrawal path under the guidance of the first guide surface 123.

[0051] In one embodiment of the present invention, see Figure 5-Figure 9 The abutting portion 112 may have an abutting surface 1121, which may be an arcuate surface. The abutting portion 112 may clamp and fix the medical device supported by the first guide surface 123 by cooperating with the abutting position through the abutting surface 1121. The abutting portion 112 abuts against the medical device through the abutting surface 1121 in the form of an arcuate surface, which may further reduce the influence caused by the stress concentration phenomenon and further ensure that the medical device will not be damaged when the abutting portion 112 abuts against the medical device.

[0052] Exemplarily, when the forceps lifting seat 120 is lifted to the aforementioned preset angle, the projection of the abutment surface 1121 on the forceps lifting seat 120 can be covered by the first guide surface 123. In this way, it can be ensured that the abutment position is on the first guide surface 123. Moreover, when two second guide surfaces 125 are provided on the forceps lifting seat 120, the abutment portion 112 abuts against the medical device, and the abutment portion 112 does not contact the second guide surface 125.

[0053] In one embodiment of the present invention, see Figure 2-Figure 5 , the distal end 122 of the lifting forceps seat 120 may be provided with a positioning groove outlet 1241, and the positioning groove 124 may be formed by extending from the positioning groove outlet 1241 along a predetermined route toward the rotating shaft end 121, and the medical device may include a first specification device 50, the diameter of the first specification device 50 is less than or equal to a preset value, and at least half of the first specification device 50 can be accommodated in the positioning groove outlet 1241. Among them, the positioning groove outlet 1241 is the protruding opening of the medical device (especially the first specification device 50) on the lifting forceps seat 120. When at least half of the first specification device 50 can be accommodated in the positioning groove outlet 1241, the positioning groove outlet 1241 can provide radial constraints for the first specification device 50, thereby preventing the first specification device 50 from shaking in the radial direction, and thus improving the stability of the guide wire.

[0054] Exemplarily, when the lifting clamp seat 120 is lifted to a preset angle, in combination with reference to Figure 9-12, the abutting position cooperates with the abutting portion 112 to clamp and fix the first specification instrument 50 supported by the first guide surface 123, and at least half of the first specification instrument 50 can be located in the positioning groove outlet 1241. At this time, the lifting forceps seat 120 is in a mechanical locking state, and at least half of the first specification instrument 50 is located in the positioning groove outlet 1241, that is, at this time, there is a large friction force between the first specification instrument 50 and the positioning groove 124, thereby reducing the force required for the abutting portion 112 and the first guide surface 123 to clamp the first specification instrument 50, and the part of the first specification instrument 50 located at the more distal end of the contact position with the abutting portion 112 can be more stably fixed due to the restriction of friction. Further, after reducing the lifting angle of the lifting forceps seat 120 to form a space for the medical device to be replaced to pass through, the first specification instrument 50 such as the guide wire is always positioned in the positioning groove outlet 1241, and will not be unstable.

[0055] For example, the positioning slot outlet 1241 can be an opening of any suitable form. Fig.12 The cross section of the positioning groove outlet 1241 can be perpendicular to the aforementioned predetermined route, and the cross section of the positioning groove outlet 1241 can be "V" shaped as a whole. It is worth noting that the "V" shape mentioned here is only used to describe the general shape of the cross section of the positioning groove outlet 1241, and does not strictly limit the cross section of the positioning groove outlet 1241 to be "V" shaped. For example, the cross section of the positioning groove outlet 1241 can be a "V" shape with an arc line around the periphery, or 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 constraints on the medical device, for example, it can prevent the medical device from deviating in other directions perpendicular to the extension path, and can be adapted to medical devices of various sizes. For a first-specification device 50 with a smaller cross-sectional diameter, first-specification devices 50 of various sizes can be accommodated in different positions of the positioning groove outlet 1241, and for a 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 constraints for the second-specification device.

[0056] Exemplarily, the first guide surface 123 may extend along the length axis LL of the lifting clamp seat 120, and the predetermined route may intersect with the length axis LL of the lifting clamp seat 120. The predetermined route may be in various forms such as an arc form, a curve form or a polyline form. It can be considered that the predetermined route can describe the extension trend of the positioning groove 124, but it does not limit how the size of the positioning groove 124 in the direction perpendicular to the predetermined route changes along the predetermined route. The predetermined route may be inclined to the length axis LL of the lifting clamp seat 120, so that the distance between the predetermined route and the length axis LL of the lifting clamp seat 120 can first gradually decrease and then gradually increase from the distal end 122 to the rotating shaft end 121, so that the predetermined route and the length axis LL of the lifting clamp seat 120 can form a cross-like form. Such a positioning groove 124 can force the medical device located therein to undergo a greater degree of deformation, thereby further increasing the friction force 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 mentioned above, the head end 100 may include an optical imaging component 130, the optical imaging component 130 may have an imaging area, and the optical imaging component 130 may generate an optical image of the subject in the imaging area. Exemplarily, the optical imaging component 130 and the extension window 111 may be located on the same side of the head end 100, and the predetermined route may be inclined toward the center of the imaging area of ​​the optical imaging component 130. After the positioning groove 124 forms a positioning for 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, which can reduce the blind spot of the field of vision when operating the medical device. When the operator operates the medical device and then controls the portion of the medical device extending from the extension window 111 to assist in diagnosis or treatment, the real-time imaging of the optical imaging component 130 can be used to observe the position of the distal end of the medical device, which can improve the effect of diagnosis or treatment.

[0058] For example, the opening size of the positioning groove 124 perpendicular to the predetermined route can be gradually reduced 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 in a "V" shape as a whole. Such a positioning groove 124 can facilitate the 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, so that the endoscope has a wider range of applicability.

[0059] For example, see Figure 8 and Fig. 9, the first guide surface 123 can extend along the length axis LL direction of the lifting forceps seat 120, and there can be a gap S between the abutment position and the positioning groove 124. When the overall direction of the positioning groove 124 and the overall direction 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, when the angle change is too large, the medical device may produce a large deformation, so that the medical device may produce a large reaction force and escape from the positioning groove 124. When the medical device is extended on the predetermined extension path, it can be considered that the medical device is approximately extended in the length axis direction LL of the lifting forceps seat 120. The medical device passes through the abutment position and the gap S before reaching the positioning groove 124, which is equivalent to providing a certain space for the direction adjustment of the medical device, so as to prevent the medical device from escaping from the positioning groove 124 due to excessive deformation when it is mechanically locked, and then escaping from the preset extension path or withdrawal path. When such an endoscope is equipped with a medical device, it can be more convenient to extend the distal end of the medical device to an appropriate position, and the effect of the endoscope participating in diagnosis or treatment is better.

[0060] In one embodiment of the present invention, see Fig.10 , the extension path may include a first extension path (illustrated path AA) and a second extension path (illustrated path BB), the retraction path may include a first retraction path and a second retraction path, the first guide surface 123 may be used to guide the first specification instrument 50 to the first extension path AA or the first retraction path, and the positioning groove 124 may 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 may not only position the first specification instrument 50, but also guide the first specification instrument 50. Taking the extension path as an example, by designing the positioning groove 124 into a suitable form, the positioning groove 124 may not only force the first specification instrument 50 located therein to deform and increase the friction force on the contact surface between the positioning groove 124 and the first specification instrument 50, but also enable the first specification instrument 50 to be deformed, and the distal end of the first specification instrument 50 may be oriented to an appropriate position. When such a head end is equipped with the first specification instrument 50, the position of the first specification instrument 50 in the subject may be more accurate. The retraction path is similar to the extension path and will not be described in detail here. Fig.10The predetermined route (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) jointly define an inscribed circle passing through the positioning groove outlet 1241 and the abutment position (the arc CC in the figure is a part of the inscribed circle, and the inscribed circle is represented by CC in the figure), and 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 minimum diameter that the first specification instrument 50 can enclose within the elastic bending range. When the first specification instrument 50 bends less than the minimum bending diameter, the first specification instrument 50 will be irreversibly bent. When a first-specification instrument 50 is mounted on such a head end, the deformation of the first-specification instrument 50 under the positioning of the positioning groove 124 will be elastic bending, which can avoid the first-specification instrument 50 from becoming unstable or irreversibly bent, and further avoid the need to replace the first-specification instrument 50 due to damage of the first-specification instrument 50 during use of the endoscope, and also avoid the first-specification instrument 50 from detaching from the positioning groove 124 due to excessive deformation, thereby improving the operator's experience.

[0061] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "vertical", "horizontal", "top", "bottom", etc. are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the contours of each component itself.

[0062] For ease of description, regional relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the regional positional relationship between one or more components or features shown in the figure and other components or features. It should be understood that regional relative terms include not only the orientation of the components as described in the figure, but also different orientations in use or operation. For example, if the components in the accompanying drawings are inverted as a whole, the components "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Therefore, the exemplary term "above" may include both "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this article is intended to include all of these situations.

[0063] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, parts, components and / or combinations thereof.

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

[0065] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of protection claimed by the utility model. The protection scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A tip portion of an endoscope, characterized in that: include: A head end base shell, wherein the head end base shell is provided with a receiving cavity, the receiving cavity is communicated with the instrument channel of the endoscope and is formed with an extension window for extending the medical instrument, and an abutment portion is provided on the edge of the extension window; and A forceps lifting seat, which is rotatably disposed in the accommodating cavity and is used to adjust the direction in which the medical device extends from the extension window. The forceps lifting seat includes a rotating shaft end and a distal end. The lifting forceps 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 withdrawal path, the first guide surface has an abutment position corresponding to the abutment portion, when the lifting forceps seat is lifted 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; The distal end of the lifting forceps seat is also provided with a positioning groove, at least part of which is formed on the first guide surface, and the positioning groove is used to position the medical device located on the extension path or the withdrawal path. Wherein, the abutting position is located outside the positioning groove.

2. The head end portion according to claim 1, characterized in that: The distal end of the lifting forceps seat is provided with a positioning groove outlet, and the positioning groove is formed by extending from the positioning groove outlet along a predetermined route toward the rotating shaft end; the medical device includes a first specification device, the diameter of the first specification device is less than or equal to a preset value, and at least half of the first specification device can be accommodated in the positioning groove outlet.

3. The head end portion according to claim 2, characterized in that: When the medical device supported by the first guide surface is a device of the first specification and the forceps lifting seat is lifted to the preset angle, at least half of the device of the first specification is located in the outlet of the positioning groove.

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

5. The head end portion according to claim 2, characterized in that: The opening size of the positioning groove perpendicular to the predetermined route gradually decreases from the distal end toward the rotating shaft end.

6. The head end portion according to any one of claims 2 to 5, characterized in that: The first guide surface extends along the longitudinal axis direction of the lifting clamp seat, and the predetermined route intersects with the longitudinal axis of the lifting clamp seat.

7. The head end portion according to claim 6, characterized in that: There is a gap between the abutting position and the positioning groove.

8. The head end portion according to claim 7, characterized in that: The predetermined route and the central axis of the first guide surface jointly define an inscribed circle passing through the positioning groove outlet and the abutment position, and the diameter of the inscribed circle is greater than the minimum bending diameter of the first specification instrument.

9. The head end portion according to claim 6, characterized in that: It also includes an optical imaging component, wherein the optical imaging component and the extension window are located on the same side of the head end base shell, and the predetermined route is inclined toward the center of the imaging area of ​​the optical imaging component.

10. An endoscope, characterized in that: It comprises the head end portion as claimed in any one of claims 1 to 9.

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