Endoscope sensor assembling structure

Abstract

The utility model provides an endoscope sensor assembling structure, an endoscope tube comprises a snake bone and a tip portion, a containing cavity channel is arranged inside the tip portion, a sensor assembly is arranged in the containing cavity channel, the sensor assembly comprises a sensor body and a sensor protection device, the sensor protection device is arranged on the outer side of the sensor body in a sleeved mode, and the sensor protection device is arranged in the containing cavity channel. An opening part is formed in the axial side wall of the sensor protection device, the sensor body is communicated with the space of the containing cavity channel through the opening part, a limiting part is arranged on the outer side of the sensor protection device, a limiting groove is formed in the inner side wall of the containing cavity channel, and the limiting part is configured to be capable of being clamped in the limiting groove and used for fixing the sensor assembly in the containing cavity channel. According to the utility model, the sensor is efficiently and stably assembled in the endoscope structure, so that the endoscope has temperature and pressure measuring functions.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to an endoscope sensor assembly structure. Background Art

[0002] The disposable flexible ureteroscope is a sterile and highly flexible flexible endoscope, mainly used for the diagnosis and treatment of ureteral diseases. During the operation, the disposable flexible ureteroscope can enter the bladder through the urethra and then reach the ureter directly, enabling the operating personnel to visually observe and analyze various pathological conditions in the ureter in detail, including but not limited to the formation and location of stones, the growth state of tumors, etc. In addition, due to the high flexibility and bendability of the disposable flexible ureteroscope, the operating personnel can use it for more precise and delicate treatment operations, such as stone removal, tumor resection, etc. With the high flexibility and excellent aseptic performance of the disposable flexible ureteroscope, the operation difficulty of the operation is effectively reduced, and the risk of potential damage to the urinary system caused by the operation is also reduced.

[0003] The disposable flexible ureteroscope structurally includes an imaging system, a bending part, an insertion part, an operation part, etc. Some newly developed disposable flexible ureteroscopes are also provided with a sensor module for detecting the pressure and temperature parameters of human organs during the operation, making the operation process control more precise. For the disposable flexible ureteroscope with a sensor, in the prior art, the sensor is often directly fixed to the tip of the mirror tube by pasting. During the operation, the sensor needs to directly contact the body fluid, and the fluid and foreign object impact in the body fluid may cause the sensor to shift or even be damaged in position, thereby affecting the detection accuracy and efficiency of the sensor. At the same time, in the prior art, the sensor cable and the imaging system cable are often directly placed in the internal cavity of the mirror tube. During the operation, due to the high flexibility of the disposable flexible ureteroscope, the cables in the mirror tube will bend with the swing of the mirror tube, making the sensor cable and the imaging system cable easy to rub against the inner wall of the cavity and be damaged due to the high-intensity bending of the mirror tube, thereby affecting the normal operation of the sensor and the imaging system. Summary of the Utility Model

[0004] The utility model aims to provide an endoscope sensor assembly structure to solve the technical problems that the existing endoscope sensor cannot achieve efficient and stable fixed connection at the tip of the mirror tube and the sensor cable is easily damaged by the swing of the mirror tube.

[0005] To solve the above problems, the technical solution of the utility model is: an endoscope sensor assembly structure, comprising: a mirror tube and a sensor assembly;

[0006] The lens tube includes a snake bone and a distal end portion provided at the distal end of the snake bone. An accommodation channel extending along the length direction of the distal end portion is provided inside the distal end portion. The accommodation channel communicates with the external space of the distal end portion. The sensor assembly is disposed in the accommodation channel and is used for monitoring the temperature and pressure parameters of human organs during surgery.

[0007] The sensor assembly includes a sensor body and a sensor protection device. The sensor protection device is sleeved outside the sensor body. A first opening portion is provided on one axial side of the sensor protection device. The sensor body communicates with the space of the accommodation channel through the first opening portion.

[0008] A limiting portion extending along the length direction of the sensor protection device is provided on the outer side of the proximal end of the sensor protection device. A limiting groove matching the limiting portion is provided on the inner side wall of the accommodation channel. A limiting surface is formed in the inner side wall of the accommodation channel at the distal end of the limiting groove. A through opening is formed at the proximal edge of the inner side wall of the accommodation channel at the proximal end of the limiting groove. The limiting portion is configured to be engaged in the limiting groove, and the distal end surface of the limiting portion abuts against the limiting surface, so as to limit the radial rotation and axial position of the sensor body in the distal end portion.

[0009] Preferably, the sensor protection device has a semi-open tube structure. The first opening portion is defined as an opening cross section in the axial direction of the tube body. The sensor protection device is sleeved outside the sensor body through the first opening portion. A positioning groove is provided on the side of the sensor protection device in contact with the sensor body inside. A fixing flange matching the positioning groove is provided on the outer side of the sensor body. The fixing flange is configured to be engaged in the positioning groove to realize the detachable fixed connection between the sensor body and the sensor protection device.

[0010] Preferably, the sensor protection device has a hollow tube structure. The sensor protection device is configured such that the sensor body can be inserted into its internal channel from the proximal end of the sensor protection device, and the sensor body is fixedly connected to the inner wall of the sensor protection device.

[0011] Preferably, a sensor cable extending along the length direction of the mirror tube is connected to the proximal end of the sensor body. A first sleeve is provided on one side of the proximal end of the sensor body. The first sleeve partially sleeved on the outer periphery of the proximal end of the sensor body and partially sleeved on the outer periphery of the distal end of the sensor cable. A second sleeve is further provided on one side of the proximal end of the first sleeve. The second sleeve partially sleeved on the outer periphery of the proximal end of the first sleeve and partially sleeved on the outer periphery of the sensor cable along the extending direction of the sensor cable. The inner diameter of the first sleeve is slightly smaller than the outer diameter of the proximal end of the sensor body, and a fixed connection is achieved through interference fit between the distal end pipe orifice of the first sleeve and the outer edge of the proximal end of the sensor body. The inner diameter of the second sleeve is slightly smaller than the outer diameter of the proximal end of the first sleeve, and a fixed connection is achieved through interference fit between the distal end pipe orifice of the second sleeve and the outer edge of the proximal end of the first sleeve.

[0012] Preferably, a second opening is further provided on the side of the sensor protection device away from the first opening. The sensor body is provided with a first sensing surface and a second sensing surface. The first sensing surface is in direct contact with the body fluid flowing into the accommodation cavity through the first opening, and the second sensing surface is aligned with the second opening and is in direct contact with the body fluid flowing into the accommodation cavity through the second opening.

[0013] Preferably, a first pore and a second pore perpendicular to the accommodation cavity and penetrating the tube wall of the distal end are respectively provided in the distal end. The first pore forms a first side pore and a second side pore arranged oppositely on the side wall of the distal end, and the second pore forms a third side pore and a fourth side pore arranged oppositely on the side wall of the distal end. The first pore and the second pore are used for introducing and discharging body fluid during the operation.

[0014] Preferably, a tapered closed inclined surface is provided at the distal end of the sensor protection device, and the closed inclined surface is used to guide the body fluid to disperse and flow along the inclined surface to the side part of the sensor protection device.

[0015] Preferably, the limiting groove is defined as a trapezoidal groove body, and the width of the top opening of the limiting groove facing the limiting part is slightly smaller than the width of the bottom of the limiting groove. The limiting part is defined as a trapezoidal structure matching the size of the limiting groove, and the width of the top end face of the limiting part is slightly larger than the width of the bottom end face of the limiting part.

[0016] Preferably, at the proximal opening position of the sensor protection device, a first seal is provided between the outer side of the sensor cable and the inner wall of the sensor protection device to prevent body fluid from flowing along the gap between the sensor cable and the sensor protection device into the rear-end structure of the mirror tube; the accommodating cavity penetrates through the opening position at the proximal end of the distal end portion, and a second seal is provided between the outer wall of the second sleeve and the inner wall of the accommodating cavity to prevent body fluid from flowing along the gap between the second sleeve and the accommodating cavity into the rear-end structure of the mirror tube.

[0017] Preferably, the first sleeve and the second sleeve are made of braided composite tubes, PTFE tubes or protection tube materials with winding springs.

[0018] Due to the adoption of the above technical solutions, the present utility model has the following advantages and positive effects compared with the prior art:

[0019] (1) In an endoscope sensor assembly structure provided by the present utility model, the sensor assembly disposed in the distal end portion of the mirror tube includes a sensor body and a sensor protection device. Corresponding and matching fixing flanges and positioning grooves are respectively provided on the sensor body and the sensor protection device. By engaging the fixing flange with the positioning groove, the sensor protection device is sleeved and fixed outside the sensor body, thereby protecting the sensor body. Further, a limiting portion is provided on the outer side of the sensor protection device, and a limiting groove matching the limiting portion is provided at the corresponding position in the accommodating cavity. By engaging the limiting portion in the limiting groove and based on the fixed relationship between the sensor body and the sensor protection device, the sensor body is stably and firmly fixed in the distal end portion of the mirror tube, avoiding the situation that the sensor body is easily impacted by body fluid and foreign objects during the operation, resulting in position deviation or even damage.

[0020] (2) In an endoscope sensor assembly structure provided by the present utility model, a first pore and a second pore perpendicular to the accommodating cavity and penetrating through the tube wall of the distal end portion are respectively provided in the distal end portion of the mirror tube. The sensing surface of the sensor body faces the cavity position in the accommodating cavity. Through the multi-pore structure setting, during the operation, body fluid can smoothly flow into the accommodating cavity and contact the sensing surface of the sensor body, preventing the situation that when a single pore is blocked by foreign objects, body fluid cannot be smoothly introduced or discharged, resulting in poor detection accuracy and low detection efficiency.

[0021] (3) In an endoscopic sensor assembly structure provided by the present utility model, since the sensor body itself has a small volume and the sensor cable has a thin diameter, the connection between the sensor body and the sensor cable is relatively fragile. During the process of fixedly assembling the sensor body together with the sensor cable to the distal end of the lens tube, the cable at the connection point between the sensor body and the sensor cable is extremely prone to breakage. Therefore, a first sleeve is provided on the outer periphery of the connection point between the sensor body and the sensor cable to enhance the connection strength between the sensor body and the sensor cable. Further, since the present utility model is directed to a disposable flexible ureteral endoscope structure, during the surgical process, the swing amplitude of the snake bone is large and the swing frequency is high. The sensor cable extending proximally to the lens tube, which is located in the snake bone, is prone to rupture and breakage due to long-term high-intensity bending driven by the snake bone. At the same time, since the snake bone is connected by a plurality of rotating shafts and buckles, there are gaps between adjacent rotating shafts and buckles. During the swing of the snake bone, the edge of the snake bone piece is prone to friction with the sensor cable. Therefore, a second sleeve is provided on the outer periphery of the sensor cable located in the snake bone to enhance the anti-bending strength of the sensor cable and prevent the sensor cable from being scratched by the edge of the snake bone piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic structural diagram of an endoscopic device provided by the present utility model;

[0023] Figure 2 Schematic assembly structure diagram a of a sensor assembly and the distal end provided by the present utility model;

[0024] Figure 3 Schematic structural diagram of the first channel and the second channel provided by the present utility model;

[0025] Figure 4 Schematic assembly structure diagram a of a sensor body and a sensor protection device provided by the present utility model;

[0026] Figure 5 Schematic assembly structure diagram b of a sensor body and a sensor protection device provided by the present utility model;

[0027] Figure 6 Schematic structural diagram of the first sleeve and the second sleeve provided by the present utility model;

[0028] Figure 7 Schematic structural diagram of the imaging component provided by the present utility model;

[0029] Figure 8 Schematic structural diagram of the imaging component in the lens tube provided by the present utility model;

[0030] Figure 9 Schematic assembly structure diagram c of a sensor body and a sensor protection device provided by the present utility model;

[0031] Figure 10 Schematic diagram b of the assembly structure of a sensor assembly and the distal end portion provided by the present utility model.

[0032] Explanation of reference numerals: 1: distal end portion; 101: accommodation cavity; 102: first channel; 103: second channel; 104: limiting groove; 2: snake bone; 3: sensor body; 301: sensor cable; 302: fixing flange; 4: sensor protection device; 401: first opening; 402: second opening; 403: limiting portion; 404: positioning groove; 405: closing inclined surface; 501: camera lens; 502: LED lamp group; 601: first sleeve; 602: second sleeve; 603: third sleeve. Detailed implementation manners

[0033] The following further elaborates in detail on an endoscope sensor assembly structure proposed by the present utility model in conjunction with the accompanying drawings and specific embodiments. According to the following description and the claims, the advantages and features of the present utility model will be clearer.

[0034] Refer to Figures 1 to 2 , this embodiment provides an endoscope sensor assembly structure, in which a sensor assembly is provided in the distal end portion 1 of the lens tube. Through the structural improvement of the distal end portion 1 and the sensor assembly, the fixed connection effect between the two and the hardware strength of the sensor assembly are improved.

[0035] Specifically, the lens tube includes a snake bone 2 component and a distal end portion 1 provided at the distal end of the snake bone 2. An accommodation cavity 101 extending along the length direction of the distal end portion 1 is provided inside the distal end portion 1. In this embodiment, the accommodation cavity 101 penetrates through the distal end and the proximal end of the distal end portion 1, that is, the distal end of the accommodation cavity 101 can be directly communicated with the external space of the distal end portion 1. During the operation, body fluid can directly flow into the accommodation cavity 101 through the opening formed by the distal end of the accommodation cavity 101 on the distal end face of the distal end portion 1. An opening is also formed at the proximal end of the accommodation cavity 101 on the proximal end face of the distal end portion 1, so that the accommodation cavity 101 can be directly communicated with the cavity inside the snake bone 2. Subsequently, the sensor cable 301 of the sensor body 3 can be extended and arranged into the cavity inside the snake bone 2 through this opening.

[0036] The sensor assembly is arranged in the accommodation cavity 101. The sensor assembly includes a sensor body 3. During the operation, body fluid flows into the accommodation cavity 101, and the detection surface of the sensor body 3 contacts the body fluid, thereby realizing the detection of parameters such as the temperature and pressure of the human organ.

[0037] More specifically, the sensor assembly further includes a sensor protection device 4. In one embodiment, the sensor protection device 4 has a semi-open hollow tube structure. The far end face of the tube is in a closed state, and the near end face of the tube is in an open state. The axial opening section of the tube is defined as the first opening 401. The sensor body 3 can be directly placed into the internal cavity of the tube through the first opening 401, that is, the sensor body 3 can pass through the first opening 401 and be placed in the sensor protection device 4, thereby achieving the assembly effect of the sensor protection device 4 being sleeved outside the sensor body 3. Further, to improve the fixed connection effect between the sensor body 3 and the sensor protection device 4, a positioning groove 404 is provided on the end face on the side of the sensor protection device 4 that contacts the sensor body 3, and a fixing flange 302 matching the positioning groove 404 is provided on one end face of the sensor body 3. During the assembly process of the sensor body 3 and the sensor protection device 4, the sensor body 3 is moved and placed in the sensor protection device 4 through the first opening 401, and further the fixing flange 302 is engaged in the positioning groove 404. Preferably, the connection strength can be improved by interference fit between the fixing flange 302 and the positioning groove 404 to achieve a locking effect, thereby realizing the detachable fixed connection between the sensor body 3 and the sensor protection device 4. The setting position of the sensor body 3 is defined by the sensor protection device 4, and a protection function is provided for the sensor body 3.

[0038] See Figure 9 And Figure 10 , in another embodiment, the sensor protection device 4 has a hollow tube structure. The far end face of the tube is a closed structure, and the near end face of the tube is an open structure. A first opening 401 is provided on the axial side wall of the tube. The sensor body 3 can be inserted into the internal cavity of the tube through the near port of the tube, that is, the sensor body 3 can be inserted into its internal cavity from the near port of the sensor protection device 4. When the sensing surface of the sensor body 3 is aligned with the first opening 401, preferably, the sensor body 3 is fixedly connected to the inner wall of the sensor protection device 4 by means of spot welding, thereby defining the setting position of the sensor body 3 and providing a protection function for the sensor body 3.

[0039] Furthermore, a limiting portion 403 extending along the length direction of the sensor protection device 4 is provided on the outer side of the proximal end of the sensor protection device 4. A limiting groove 104 matching the limiting portion 403 is provided on the inner side wall of the accommodating cavity 101. Among them, the distal end of the limiting groove 104 is of a closed structure, that is, a limiting surface is formed in the inner side wall of the accommodating cavity 101 at the distal end of the limiting groove 104, and the proximal end of the limiting groove 104 extends to the proximal edge of the inner side wall of the accommodating cavity 101, that is, a through opening is formed at the proximal edge of the inner side wall of the accommodating cavity 101 at the proximal end of the limiting groove 104. During the process of assembling the sensor protection device 4 into the accommodating cavity 101, the sensor protection device 4 and the accommodating cavity 101 maintain a parallel posture. Insert the distal end of the limiting portion 403 into the through opening and move it along the extending direction of the limiting groove 104, insert the entire limiting portion 403 into the limiting groove 104 until the distal end of the limiting portion 403 abuts against the limiting surface, realizing the snap-fitting fixation of the limiting portion 403 and the limiting groove 104, that is, realizing the fixation of the sensor assembly in the distal end portion 1 of the mirror tube, and further restricting the radial rotation and axial position of the sensor body 3 in the distal end portion 1, ensuring the detection accuracy and detection efficiency of the sensor body 3.

[0040] Through the endoscopic sensor assembly structure provided by this embodiment, the efficient and stable connection between the sensor body 3 and the sensor protection device 4, and the efficient and stable connection between the sensor protection device 4 and the distal end portion 1 are respectively realized. Furthermore, the sensor body 3 can maintain a stable posture inside the distal end portion 1, and the risk of damage to the sensor body 3 caused by foreign object impact during the operation is reduced.

[0041] Preferably, referring to Figure 6 , a sensor cable 301 extending along the length direction of the mirror tube is connected to the proximal end of the sensor body 3, which is used to supply power to the sensor body 3 and transmit detection data. A first sleeve 601 is provided on one side of the proximal end of the sensor body 3. A part of the first sleeve 601 is sleeved on the outer periphery of the proximal end of the sensor body 3, and the remaining part of the first sleeve 601 is sleeved on the outer periphery of the distal end of the sensor cable 301 connected to the sensor body 3, that is, the connection end position of the sensor body 3 and the sensor cable 301 is wrapped by the first sleeve 601. Further, a second sleeve 602 is also provided on one side of the proximal end of the first sleeve 601. A part of the second sleeve 602 is sleeved on the outer periphery of the proximal end of the first sleeve 601, and the remaining part of the second sleeve 602 is sleeved on the outer periphery of the sensor cable 301 along the extending direction of the sensor cable 301, that is, the remaining entire sensor cable 301 except the part wrapped by the first sleeve 601 is wrapped by the second sleeve 602.

[0042] In this embodiment, since the sensor body 3 is small in its own volume and the diameter of the sensor cable 301 is thin, the connection strength at the connection end of the sensor body 3 and the sensor cable 301 is relatively weak. During the process of fixedly assembling the sensor body 3 together with the sensor cable 301 to the distal end portion 1 of the lens tube, the cable at the connection point position between the sensor body 3 and the sensor cable 301 is extremely easy to be damaged. Therefore, a first sleeve 601 is provided on the outer periphery of the connection point position between the sensor body 3 and the sensor cable 301 to enhance the connection strength between the sensor body 3 and the sensor cable 301. Further, since the present utility model can be applied to a disposable flexible ureteroscope structure, during the operation, the swing amplitude of the snake bone 2 is large and the swing frequency is high. The sensor cable 301 extending towards the proximal end of the lens tube, i.e., located in the inner cavity of the snake bone 2, is prone to rupture and damage due to long-term high-intensity bending driven by the snake bone 2. At the same time, since the snake bone 2 is connected by a plurality of rotating shafts and buckles, there are gaps between adjacent rotating shafts and buckles. During the swinging process of the snake bone 2, the edge of the snake bone 2 is likely to rub against the sensor cable 301. Therefore, a second sleeve 602 is provided on the outer periphery of the sensor cable 301 located in the snake bone 2 to enhance the anti-bending strength of the sensor cable 301 and prevent the sensor cable 301 from being scratched by the edge of the snake bone 2. Among them, both the first sleeve 601 and the second sleeve 602 are made of braided composite tubes, PTFE tubes or protective tube materials with winding springs, and have better anti-wear performance and bendability, providing a protective effect for the sensor cable 301 without affecting the normal bending of the sensor cable 301.

[0043] Specifically, in this embodiment, the inner diameter of the first sleeve 601 is slightly smaller than the outer diameter of the proximal end of the sensor body 3, that is, the distal end port of the first sleeve 601 and the proximal outer edge of the sensor body 3 are fixedly connected by an interference fit method. The inner diameter of the second sleeve 602 is slightly smaller than the outer diameter of the proximal end of the first sleeve 601, that is, the distal end pipe orifice of the second sleeve 602 and the proximal outer edge of the first sleeve 601 are also fixedly connected by an interference fit method. Preferably, the connection strength between different components can be further enhanced by setting connection colloids at the connection positions between the first sleeve 601 and the sensor body 3 and between the second sleeve 602 and the first sleeve 601, to prevent the first sleeve 601 and the second sleeve 602 from falling off during the use of the endoscope.

[0044] Preferably, refer to Figures 4 to 5, on the side of the sensor protection device 4 away from its first opening 401, a through second opening 402 is further provided. The sensor body 3 is provided with a first sensing surface and a second sensing surface, which are located on both sides of the sensor body 3 respectively, that is, the first sensing surface faces the first opening 401, and the second sensing surface faces the second opening 402. Among them, after the sensor body 3 and the sensor protection device 4 are assembled, the second sensing surface is aligned with the second opening 402, that is, the first sensing surface is in direct contact with the body fluid flowing into the accommodation cavity 101 through the first opening 401, and the second sensing surface is in direct contact with the body fluid flowing into the accommodation cavity 101 through the second opening 402. Through the structural setting of the double openings and double sensing surfaces, the detection function of the sensor body 3 for different parameter indicators of the body fluid can be realized, and the detection efficiency can be improved.

[0045] Preferably, referring to Figure 3 , a first pore 102 and a second pore 103 perpendicular to the accommodation cavity 101 and penetrating the tube wall of the tip 1 are respectively provided in the tip 1. The first pore 102 forms a first side hole and a second side hole arranged oppositely on the side wall of the tip 1, and the second pore 103 forms a third side hole and a fourth side hole arranged oppositely on the side wall of the tip 1. The first pore 102, the second pore, and the opening formed by the distal end of the accommodation cavity 101 mentioned above on the distal end surface of the tip 1 are all communicated with the accommodation cavity 101. Through the design of the multi-pore and multi-side hole structure, the number of body fluid introduction and discharge channels in the tip 1 is increased, avoiding that during the operation, after a single pipeline is blocked by human tissues or foreign objects, the body fluid cannot be smoothly introduced or discharged, affecting the detection accuracy and detection stability of the sensor.

[0046] Preferably, referring to Figure 5 , the distal end surface of the sensor protection device 4 is provided with a conical closed inclined surface 405. During the operation, when the body fluid directly flows in from the opening formed by the distal end of the accommodation cavity 101 on the distal end surface of the tip 1, the body fluid flows along the extension direction of the accommodation cavity 101, and the flow rate is relatively fast, which will generate a large impact force on the distal end surface of the sensor assembly. Under long-term surgical operations, the body fluid is likely to push the sensor assembly to generate a position shift. Therefore, the closed inclined surface 405 is provided to guide the body fluid to disperse and flow along the inclined surface to the side of the sensor protection device 4, thereby improving the stability of the sensor body 3.

[0047] Preferably, the limiting groove 104 is defined as a trapezoidal groove body. The width of the top opening of the limiting groove 104 on the side facing the limiting portion 403 is slightly smaller than the width of the bottom of the limiting groove 104. The limiting portion 403 is also defined as a trapezoidal structure matching the size of the limiting groove 104, that is, the width of the top end face of the limiting portion 403 is slightly larger than the width of the bottom end face of the limiting portion 403. Without affecting the insertability of the limiting portion 403 into the limiting groove 104 to achieve quick assembly, when the limiting portion 403 is placed in the limiting groove 104, the trapezoidal inclined surfaces on both sides of the limiting groove 104 will exert a clamping force on the limiting portion 403 towards the inside of the trapezoidal groove body, so that a better self-locking state is achieved between the limiting portion 403 and the limiting groove 104, thereby preventing the sensor assembly from generating radial movement in the accommodation cavity 101 and enabling the sensor assembly to achieve a better fixing effect.

[0048] Preferably, at the proximal opening position of the sensor protection device 4, a first seal is provided in the gap between the outer side of the sensor cable 301 and the inner wall of the sensor protection device 4. The first seal can be made of components such as sealing colloid and sealing ring, and is used to prevent body fluid from flowing along the gap between the sensor cable 301 and the sensor protection device 4 to the rear-end structure of the lens tube, avoiding equipment contamination and even affecting the normal operation of the lens tube. At the opening position formed by the proximal end of the accommodation cavity 101 penetrating the near end face of the distal end portion 1, a second seal is also provided in the gap between the outer wall of the second sleeve 602 and the inner wall of the accommodation cavity 101. The second seal can be made of components such as sealing colloid and sealing ring, and is used to prevent body fluid from flowing along the gap between the second sleeve 602 and the accommodation cavity 101 to the rear-end structure of the lens tube.

[0049] Furthermore, referring to Figures 7 to 8 , in this embodiment, in addition to the sensor assembly, an imaging assembly is further provided in the distal end portion 1 of the lens tube. The imaging assembly includes a camera lens 501 and an LED lamp group 502. The proximal end of the imaging assembly is connected with an imaging cable extending along the length direction of the snake bone 2 and is built in the internal cavity of the snake bone 2 for supplying power to the imaging assembly and transmitting imaging data. The imaging cable is thicker in diameter than the sensor cable 301. Since the snake bone 2 is connected by a plurality of rotating shafts and buckles, there is a gap between adjacent rotating shafts and buckles. During the swinging of the snake bone 2, the imaging cable is likely to contact the inner wall of the snake bone 2 and generate friction, and even the outer wall of the imaging cable will enter the gap between adjacent rotating shafts and buckles, and then be bitten or even bitten off by the snake bone 2. Therefore, a third sleeve 603 is further provided outside the imaging cable. The third sleeve 603 is made of PTFE polytetrafluoroethylene material, braided composite tube or protection tube with a winding spring, and has better flexibility and wear resistance, which can effectively ensure the operation safety of the imaging cable located in the snake bone 2.

[0050] In addition, in the description of this application, "proximal end" and "distal end" are terms commonly used in the medical field. Specifically, the "proximal end" is the end close to the operator, the "proximal face" is the face close to the operator, the "distal end" is the end far from the operator, and the "distal face" is the face far from the operator.

[0051] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments. Even if various changes are made to the present utility model, provided that these changes fall within the scope of the claims of the present utility model and its equivalent technologies, they still fall within the protection scope of the present utility model.

Claims

1. An endoscope sensor assembly structure, characterized in that: include: Mirror tube and sensor assembly; The scope tube includes a snake bone and a tip portion disposed at the distal end of the snake bone, wherein a receiving cavity extending along the length direction of the tip portion is disposed inside the tip portion, the receiving cavity is communicated with the external space of the tip portion, and the sensor assembly is disposed in the receiving cavity for monitoring the temperature and pressure parameters of human organs during surgery; The sensor assembly comprises a sensor body and a sensor protection device, wherein the sensor protection device is sleeved on the outside of the sensor body, and a first opening is opened on one axial side of the sensor protection device, and the sensor body is connected with the accommodating cavity space through the first opening; A limiting portion extending along the length direction of the sensor protection device is provided on the proximal outer side of the sensor protection device, and a limiting groove matching the limiting portion is provided on the inner side wall of the accommodating cavity. A limiting surface is formed in the inner side wall of the accommodating cavity at the distal end of the limiting groove, and a through opening is formed at the proximal edge of the inner side wall of the accommodating cavity at the proximal end of the limiting groove. The limiting portion is configured to be engaged in the limiting groove, and the distal end surface of the limiting portion abuts against the limiting surface, thereby limiting the radial rotation and axial position of the sensor body in the distal end portion.

2. The endoscope sensor assembly structure according to claim 1, characterized in that: The sensor protection device is in the form of a semi-open tubular structure, wherein the first opening portion is defined as an axial opening section of the tube body, and the sensor protection device is sleeved on the outside of the sensor body through the first opening portion; a positioning groove is provided on the side of the sensor protection device that contacts the sensor body, and a fixing flange matching the positioning groove is provided on the outside of the sensor body, and the fixing flange is configured to be snap-fitted into the positioning groove, so as to achieve a detachable fixed connection between the sensor body and the sensor protection device.

3. The endoscope sensor assembly structure according to claim 1, characterized in that: The sensor protection device is in a hollow tube structure. The sensor protection device is configured such that the sensor body can be inserted into the internal cavity of the sensor protection device from the proximal end thereof, and the sensor body is fixedly connected to the inner wall of the sensor protection device.

4. The endoscope sensor assembly structure according to claim 1, characterized in that: A sensor cable extending along the length direction of the mirror tube is connected to the proximal end of the sensor body, and a first sleeve is provided on one side of the proximal end of the sensor body, and the first sleeve is partially sleeved on the proximal periphery of the sensor body, and partially sleeved on the distal periphery of the sensor cable; a second sleeve is also provided on one side of the proximal end of the first sleeve, and the second sleeve is partially sleeved on the proximal periphery of the first sleeve, and partially sleeved on the periphery of the sensor cable along the extension direction of the sensor cable; the inner diameter of the first sleeve is slightly smaller than the proximal outer diameter of the sensor body, and the distal end of the first sleeve is fixedly connected to the proximal outer edge of the sensor body by interference fit; the inner diameter of the second sleeve is slightly smaller than the proximal outer diameter of the first sleeve, and the distal end of the second sleeve is fixedly connected to the proximal outer edge of the first sleeve by interference fit.

5. The endoscope sensor assembly structure according to claim 2 or 3, characterized in that: The sensor protection device is further provided with a second opening on a side away from the first opening. The sensor body is provided with a first sensing surface and a second sensing surface. The first sensing surface is in direct contact with the body fluid flowing into the accommodating cavity through the first opening. The second sensing surface is aligned with the second opening and is in direct contact with the body fluid flowing into the accommodating cavity through the second opening.

6. The endoscope sensor assembly structure according to claim 1, characterized in that: A first channel and a second channel are respectively opened in the distal end portion, which are perpendicular to the accommodating cavity and penetrate the tube wall of the distal end portion. The first channel forms a first side hole and a second side hole oppositely arranged on the side wall of the distal end portion, and the second channel forms a third side hole and a fourth side hole oppositely arranged on the side wall of the distal end portion. The first channel and the second channel are used for introducing and draining body fluids during surgery.

7. The endoscope sensor assembly structure according to claim 1, characterized in that: The sensor protection device has a conical closed slope at the distal end, and the closed slope is used to guide the body fluid to disperse and flow along the slope to the side of the sensor protection device.

8. The endoscope sensor assembly structure according to claim 1, characterized in that: The limiting groove is defined as a trapezoidal groove body, and the top opening width of the limiting groove toward the limiting portion is slightly smaller than the bottom width of the limiting groove; the limiting portion is defined as a trapezoidal structure matching the size of the limiting groove, and the top end face width of the limiting portion is slightly larger than the bottom end face width of the limiting portion.

9. The endoscope sensor assembly structure according to claim 4, characterized in that: At the proximal opening position of the sensor protection device, a first seal is provided between the outer side of the sensor cable and the inner wall of the sensor protection device, for preventing body fluids from flowing along the gap between the sensor cable and the sensor protection device to the rear end structure of the mirror tube; the accommodating cavity passes through the opening position proximal to the front end, and a second seal is provided between the outer wall of the second sleeve and the inner wall of the accommodating cavity, for preventing body fluids from flowing along the gap between the second sleeve and the accommodating cavity to the rear end structure of the mirror tube.

10. The endoscope sensor assembly structure according to claim 4, characterized in that: The first sleeve and the second sleeve are made of a braided composite tube, a PTFE tube or a protective tube with a winding spring.

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