Tip head assembly and endoscope

Abstract

The tip end assembly comprises a tip end shell, and the tip end shell is provided with a water injection opening and a composite function opening; one end of the water injection pipe is arranged in the water injection opening, and the other end of the water injection pipe is used for being connected with a filling pump; one end of the composite function pipe is arranged in the composite function opening, the other end of the composite function pipe is used for being connected with negative pressure equipment, and a pipe cavity of the composite function pipe is used for allowing stone breaking equipment to penetrate through. The lithotripsy equipment can be used for crushing calculi, and meanwhile, by means of the fluidity of perfusate and the suction effect of the negative pressure equipment, the perfusate can carry crushed calculi to be discharged from the composite function pipe, so that the effect that water injection and water discharge as well as lithotripsy and calculi discharge can be synchronously performed in an operation is achieved; the related preparation work content that a negative pressure suction sheath needs to be installed by means of a guide wire in the preoperative preparation stage is omitted, time consumed for preoperative preparation is shortened, and therefore the operation efficiency can be remarkably improved, and the burden of a patient is relieved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly to a distal head assembly and an endoscope. Background Art

[0002] An endoscope is a commonly used medical device. More specifically, an endoscope is a detection instrument integrating traditional optics, human engineering, precision machinery, modern electronics, mathematics, software, etc., and has an image sensor, an optical lens, an illumination light source, a mechanical device, etc. It can enter the human body cavity through natural orifices to examine the cavities communicating with the outside (such as the digestive tract, respiratory tract, urinary tract, etc.), or can be inserted into the endoscope through an incision to examine the closed body cavities (such as the thoracic cavity, abdominal cavity, joint cavity, etc.). Medical endoscopes have been widely used in various departments for examination. To clearly and intuitively understand the lesion site and improve the accuracy of lesion diagnosis, the endoscope plays a crucial role in the surgical process. According to the parts reached by the medical endoscope in the human body, it can be divided into otorhinolaryngoscope, gastroscope, ureteroscope, arthroscope, etc.

[0003] Ureteropyeloscopic technology is increasingly used in clinical practice and has become an indispensable part of urology. It has the advantages of less trauma, simple operation, and rapid postoperative recovery. Currently, ureteropyelolithotripsy surgery generally uses an endoscope in combination with a flexible negative pressure aspiration sheath. The perfusion fluid enters the renal pelvis through the instrument channel tube of the endoscope and is discharged under negative pressure through the gap formed between the outer wall of the insertion part and the inner wall of the negative pressure aspiration sheath. However, in order to smoothly insert the negative pressure aspiration sheath into the human body cavity, a guide wire needs to be implanted before the operation, then the negative pressure aspiration sheath is implanted using the guide wire, and then the guide wire is removed before the lithotripsy surgery can be performed, resulting in a long preoperative preparation time, affecting the surgical efficiency, and easily increasing the burden on patients. Summary of the Utility Model

[0004] Based on this, it is necessary to provide a distal head assembly and an endoscope to address the problems of long preoperative time, affecting surgical efficiency, and increasing the burden on patients.

[0005] In the first aspect of the present application, a distal head assembly is provided, which includes:

[0006] A distal housing that is respectively provided with a water injection port and a composite function port;

[0007] A water injection tube, one end of which is disposed in the water injection port, and the other end of which is used to connect to a perfusion pump; and

[0008] A composite function tube, one end of which is disposed in the composite function port, the other end of which is used to connect to a negative pressure device, and the lumen of the composite function tube is used for a lithotripsy device to pass through.

[0009] In the tip component of the present application, by providing a water injection port and a composite function port on the tip shell, and installing a water injection pipe and a composite function pipe into the water injection port and the composite function port respectively, after implanting the tip component into the patient's body cavity, starting the perfusion pump, the perfusion fluid can be injected into the body cavity through the water injection pipe and the water injection port. At the same time, the lithotripsy device arranged in the composite function pipe is started and the negative pressure device connected to the composite function pipe is started, so that the lithotripsy device can perform crushing treatment on the stone. Meanwhile, by virtue of the fluidity of the perfusion fluid and the suction effect of the negative pressure device, the perfusion fluid can carry the crushed stones and discharge from the composite function pipe. Thus, the effects of synchronously injecting and discharging water and synchronously crushing and discharging stones during the operation are achieved, eliminating the relevant preparatory work content of installing a negative pressure suction sheath with the aid of a guide wire in the preoperative preparation stage, reducing the time-consuming of the preoperative preparation, and thus significantly improving the operation efficiency and reducing the burden on the patient.

[0010] The technical solution of the present application will be further described below:

[0011] In one embodiment, a gap is formed between the inner pipe wall of the composite function pipe and the outer wall of the lithotripsy device, and the gap is used for returning water and discharging stones.

[0012] In one embodiment, the lithotripsy device can be completely withdrawn from the composite function pipe, so that the lumen of the composite function pipe forms a discharge channel, and the discharge channel is used for returning water and discharging stones.

[0013] In one embodiment, the tip component further includes a first adhesive, and one end of the water injection pipe is adhesively fixed in the water injection port through the first adhesive.

[0014] In one embodiment, the tip component further includes a second adhesive, and one end of the composite function pipe is adhesively fixed in the composite function port through the second adhesive.

[0015] In one embodiment, the water injection port is formed on the side surface of the tip shell, at least two water injection pipes are provided, and at least two water injection pipes are jointly installed in the water injection port;

[0016] Alternatively, two water injection ports are provided, the tip shell has opposite first and second sides, one water injection port is provided on each of the first side and the second side, at least two water injection pipes are provided, and at least one water injection pipe is installed in each water injection port;

[0017] Alternatively, the water injection port is formed on the end surface of the tip shell, at least two water injection pipes are provided, and at least two water injection pipes are jointly installed in the water injection port;

[0018] Alternatively, there are two water injection ports. One of the water injection ports is formed on the side surface of the tip housing, and the other water injection port is formed on the end surface of the tip housing. There are at least two water injection pipes, and at least one water injection pipe is installed in each water injection port.

[0019] In one embodiment, the tip head assembly further includes a pressure measuring unit and / or a temperature measuring unit. The tip housing further has a first mounting hole, and the measuring head of the pressure measuring unit and / or the temperature measuring unit is disposed in the first mounting hole.

[0020] In one embodiment, the tip head assembly further includes a camera unit. The tip housing further has a second mounting hole, and the camera unit is disposed in the second mounting hole.

[0021] In one embodiment, the tip head assembly further includes a lighting unit. The tip housing further has a third mounting hole, and the lighting unit is disposed in the third mounting hole, and the lighting unit is arranged in cooperation with the camera unit;

[0022] And / or, the tip housing is made of a colorless and transparent material.

[0023] In the second aspect of the present application, an endoscope is further provided, which includes a handle, an insertion tube, a snake bone, and the tip head assembly as described above. The handle, the insertion tube, the snake bone, and the tip head assembly are connected in sequence. Description of the Drawings

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application.

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is an assembly structure diagram of the tip head assembly of an embodiment.

[0027] Figure 2 It is Figure 1 a partial exploded structure diagram of the tip head assembly in

[0028] Figure 3 It is an assembly structure diagram of the tip head assembly of another embodiment.

[0029] Figure 4 It isFigure 3 Partial exploded structural schematic diagram of the front end head assembly.

[0030] Figure 5 Assembly structure diagram of the front end head assembly of another embodiment.

[0031] Figure 6 For Figure 5 Partial exploded structural schematic diagram of the front end head assembly.

[0032] Explanation of reference numerals:

[0033] 100, front end head assembly; 10, front end housing; 11, water injection port; 12, composite function port; 13, first mounting hole; 14, second mounting hole; 15, third mounting hole; 20, water injection pipe; 30, composite function pipe; 40, pressure measurement unit and / or temperature measurement unit; 50, camera unit; 60, lighting unit. Detailed implementation manners

[0034] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that if there appear these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present application.

[0036] In addition, if there appear these terms "first", "second", these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if there appears the term "plurality", the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0037] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In this application, unless otherwise clearly specified and defined, if there is a description such as the first feature being "on" or "under" the second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0040] Refer to Figures 1 to 6 , a tip head assembly 100 shown in an embodiment of this application, which includes a tip shell 10, a water injection pipe 20, and a composite function pipe 30.

[0041] The tip shell 10 serves as the load-bearing main body of the tip head assembly 100 and is used to load the integrated water injection pipe 20 and the composite function pipe 30.

[0042] Specifically, the tip shell 10 is respectively provided with a water injection port 11 and a composite function port 12; one end of the water injection pipe 20 is disposed in the water injection port 11, and the other end of the water injection pipe 20 is used to connect to a perfusion pump; one end of the composite function pipe 30 is disposed in the composite function port 12, the other end of the composite function pipe 30 is used to connect to a negative pressure device, and the lumen of the composite function pipe 30 is used for a lithotripsy device to pass through.

[0043] It is easy to understand that the water injection port 11 and the water injection pipe 20 and the composite functional port 12 and the composite functional pipe 30 need to be structurally profiled to ensure that the water injection pipe 20 can be installed and fixed in the water injection port 11 and the composite functional pipe 30 can be installed and fixed in the composite functional port 12. For example, when the water injection port 11 and the composite functional port 12 both adopt circular holes, the water injection pipe 20 and the composite functional pipe 30 both adopt circular pipe fittings; when the water injection port 11 and the composite functional port 12 both adopt rectangular holes, the water injection pipe 20 and the composite functional pipe 30 both adopt square pipe fittings; and so on.

[0044] It should be noted that the lumen of the composite functional tube 30 has at least the following two functions: one is to provide the space required for the installation of the lithotripsy equipment so that the processing head of the lithotripsy equipment can reach the lesion site in the body cavity and then perform lithotripsy treatment; the other is to allow the perfusion fluid (such as saline solution, etc.) injected into the body cavity through the water injection tube 20 to be discharged from the patient's body through the composite functional tube 30 under the suction of the negative pressure device.

[0045] Optionally, the negative pressure device may be, but is not limited to, a negative pressure pump. The lithotripsy device may be, but is not limited to, a laser fiber.

[0046] In summary, the implementation of the technical solution of this embodiment will achieve the following beneficial effects: in the front-end assembly 100 of the present application, by setting the water injection port 11 and the composite functional port 12 on the front-end shell 10, and installing the water injection pipe 20 and the composite functional pipe 30 into the water injection port 11 and the composite functional port 12 respectively, after the front-end assembly 100 is implanted into the patient's body cavity, the perfusion pump is started, and the perfusion liquid can be injected into the body cavity through the water injection pipe 20 and the water injection port 11. At the same time, the lithotripsy device installed in the composite functional pipe 30 is started and connected with the composite functional pipe 30. The negative pressure device connected to the functional tube 30 is started, allowing the lithotripsy device to crush the stones. At the same time, with the help of the fluidity of the perfusion fluid and the suction effect of the negative pressure device, the perfusion fluid can carry the crushed stones and be discharged from the composite functional tube 30, thereby achieving the effect of simultaneous water injection and water discharge as well as stone crushing and stone removal during the operation, eliminating the need for the relevant preparatory work of installing the negative pressure suction sheath with the help of a guide wire in the preoperative preparation stage, reducing the time spent on preoperative preparation, thereby significantly improving the efficiency of the operation and reducing the burden on patients.

[0047] It is necessary to explain that the inner diameter of the composite functional pipe 30 of the present application adopts an expanded diameter design, that is, compared with the conventionally used composite functional pipe 30, the inner diameter of the composite functional pipe 30 of the present application will be larger, so as to simultaneously meet the dual needs of penetrating and installing stone crushing equipment and discharging water and stones.

[0048] During the actual surgical treatment process, depending on the different particle sizes of the crushed stones formed after the stones are processed through breakage, the means of discharging the stones also vary. For example, in an alternative embodiment, to meet the need for simultaneous water discharge and stone discharge, the inner diameter of the composite function tube 30 is designed to be slightly larger than the outer diameter of the stone crushing device, so that a gap is formed between the inner wall of the composite function tube 30 and the outer wall of the stone crushing device. The gap is used for returning water and discharging stones. At this time, the size of the gap is small, so it can meet the requirement that crushed stones with smaller particle sizes pass through the gap for discharge, that is, it can achieve the simultaneous discharge of returned water and small-particle-size crushed stones.

[0049] In another alternative embodiment, if the particle size of the crushed stones formed after being processed by the stone crushing device is still large, at this time, the stone crushing device can be completely withdrawn from the composite function tube 30, so that the lumen of the composite function tube 30 forms a discharge channel. The discharge channel is used for returning water and discharging stones. This enables the perfusion fluid and large-particle-size crushed stones to be smoothly discharged from the larger-diameter discharge channel, avoiding problems such as stone blockage and unsmooth stone discharge.

[0050] In addition, on the basis of any of the above embodiments, the tip end assembly 100 further includes a first adhesive member (not shown in the figure), and one end of the water injection pipe 20 is adhesively fixed in the water injection port 11 through the first adhesive member. Further, the tip end assembly 100 further includes a second adhesive member (not shown in the figure), and one end of the composite function tube 30 is adhesively fixed in the composite function port 12 through the second adhesive member.

[0051] With the adhesive force provided by the first adhesive member and the second adhesive member, the strength and stability of the installation of the water injection pipe 20 in the water injection port 11 and the installation of the composite function tube 30 in the composite function port 12 can be improved.

[0052] Optionally, the first adhesive member and the second adhesive member can be, but are not limited to, glue, double-sided tape, etc.

[0053] Alternatively, in other alternative embodiments, the water injection pipe 20 and the composite function tube 30 can also be detachably installed by means of magnetic attraction, buckling, threading, etc.

[0054] In addition, by adopting different layout schemes for the water injection port 11, different perfusion fluid flushing directions can be obtained, and different layout schemes of the tip end assembly 100 can be obtained, so as to adapt to different size design requirements and meet the needs of different treatment occasions. For example, as Figure 1 and Figure 2 shown, in an alternative embodiment, the water injection port 11 is formed on the side surface of the tip end shell 10, and at least two water injection pipes 20 are provided. The at least two water injection pipes 20 are jointly installed in the water injection port 11. In this way, water can be discharged from the side surface of the tip end assembly 100.

[0055] Alternatively, as an alternative to the above embodiments, as Figure 3 and Figure 4 , there are two water injection ports 11. The front end housing 10 has opposite first and second sides, and one water injection port 11 is provided on each of the first side and the second side. There are at least two water injection pipes 20, and at least one water injection pipe 20 is installed in each water injection port 11. In this way, water can be discharged simultaneously from both sides of the front end head assembly 100.

[0056] Alternatively, as an alternative to any of the above embodiments, as Figure 5 and Figure 6 , the water injection port 11 is formed on the end face of the front end housing 10. There are at least two water injection pipes 20, and at least two water injection pipes 20 are jointly installed in the water injection port 11. In this way, water can be discharged from the end face of the front end head assembly 100.

[0057] Alternatively, as an alternative to any of the above embodiments, there are two water injection ports 11. One water injection port 11 is formed on the side of the front end housing 10, and the other water injection port 11 is formed on the end face of the front end housing 10. There are at least two water injection pipes 20, and at least one water injection pipe 20 is installed in each water injection port 11. In this way, water can be discharged simultaneously from the end face and the side of the front end head assembly 100.

[0058] In this application, the water injection port 11 can be any one of regular shapes such as circular, square, triangular, etc., or the water injection port 11 can also adopt a special-shaped structure design.

[0059] In this application, the composite function port 12 is formed on the end face of the front end housing 10. The local or overall end face of the front end housing 10 forming the composite function port 12 is a bevel or arc surface structure, which can form a guiding effect and make it easier for the front end head assembly 100 to be implanted into the patient's body cavity.

[0060] In addition, on the basis of any of the above embodiments, the front end head assembly 100 further includes a pressure measuring unit and / or a temperature measuring unit 40. The front end housing 10 is further provided with a first installation hole 13, and the measuring head of the pressure measuring unit and / or the temperature measuring unit 40 is arranged in the first installation hole 13.

[0061] Specifically, the pressure measuring unit and / or the temperature measuring unit 40 includes a pressure measuring sensor and / or a temperature measuring sensor. The pressure measuring sensor and the temperature measuring sensor are two independent devices, or can also be integrated into one structure, and can be flexibly selected according to actual needs.

[0062] The measuring heads of the pressure sensor and the temperature sensor both extend from the first mounting hole 13 to the outside of the distal end housing 10. In some endoscopic surgeries, due to the small space at the lesion site of the patient and some special reasons, the outlet diameter is small, resulting in insufficient water output, which causes a large cavity pressure in the patient's body cavity and brings secondary harm to the patient. To avoid this situation, a pressure sensor is usually installed on the distal end housing 10 to measure the cavity pressure at the lesion site in real time. When it is measured that the cavity pressure abnormally increases, measures such as controlling the water inflow are taken to reduce the cavity pressure, thereby reducing the discomfort of the patient. According to clinical feedback, both too low and too high perfusion fluid temperatures will affect the patient's vital signs. If the perfusion fluid temperature is too low, it will carry away a large amount of heat, reduce the body temperature, increase the oxygen consumption of the body, and cause adverse reactions such as hypothermia, increased heart rate, postoperative shivering, restlessness, and arrhythmia. If the perfusion fluid temperature is too high, the patient will have a sense of fever, and the blood flow velocity of the capillaries in the renal pelvis will increase, and the loss of electrolytes from the perfusion fluid will increase, resulting in an increased risk of electrolyte imbalance in the patient's body. Therefore, setting a temperature sensor helps medical staff to grasp the temperature of the perfusion fluid injected into the patient's body in real time to avoid the above problems.

[0063] As Figure 1 , Figure 3 and Figure 5 shown, in another embodiment, the distal end head assembly 100 further includes a camera unit 50, and the distal end housing 10 is further provided with a second mounting hole 14, and the camera unit 50 is disposed in the second mounting hole 14. Further, the distal end head assembly 100 further includes a lighting unit 60, and the distal end housing 10 is further provided with a third mounting hole 15, and the lighting unit 60 is disposed in the third mounting hole 15, and the lighting unit 60 is arranged in cooperation with the camera unit 50. During the operation, the camera unit 50 obtains images of the lesion site in real time, which provides strong assistance for medical staff to clearly and intuitively understand the lesion site and improve the accuracy of lesion diagnosis. Considering that the body cavity is a narrow and enclosed space, setting the lighting unit 60 to provide auxiliary illumination light for the camera unit 50 helps to obtain brighter and clearer image data.

[0064] Preferably, the distal end housing 10 is made of a colorless and transparent material. This can enable the illumination light emitted by the lighting unit 60 to penetrate the distal end housing 10 and illuminate a larger body cavity area, assisting the camera unit 50 to obtain a larger clear field of view.

[0065] For example, the camera unit 50 specifically includes, but is not limited to, a CMOS image sensor. The lighting unit 60 uses an LED lighting lamp, and the LED lighting lamp can be any one of a lamp bead, a light strip, a lamp tube, etc.

[0066] In addition to the above, the present application also provides an endoscope, which includes a handle, an insertion tube, a snake bone, and the above distal end head assembly 100, and the handle, the insertion tube, the snake bone, and the distal end head assembly 100 are connected in sequence.

[0067] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0068] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A tip component, characterized in that, Comprising: A distal end housing, the distal end housing is respectively provided with a water injection port and a composite function port; A water injection pipe, one end of the water injection pipe is arranged in the water injection port, and the other end of the water injection pipe is used for connecting with a perfusion pump; and A composite function pipe, one end of the composite function pipe is arranged in the composite function port, the other end of the composite function pipe is used for connecting with a negative pressure device, and the lumen of the composite function pipe is used for a lithotripsy device to pass through.

2. The tip head assembly according to claim 1, wherein, A gap is formed between the inner pipe wall of the composite function pipe and the outer wall of the lithotripsy device, and the gap is used for returning water and discharging stones.

3. The tip head assembly according to claim 1, wherein The lithotripsy device can be completely withdrawn from the composite function pipe, so that the lumen of the composite function pipe forms a discharge channel, and the discharge channel is used for returning water and discharging stones.

4. The tip head assembly according to claim 1, wherein The distal end head assembly further includes a first adhesive, and one end of the water injection pipe is adhesively fixed in the water injection port through the first adhesive.

5. The tip head assembly according to claim 1, wherein, The distal end head assembly further includes a second adhesive, and one end of the composite function pipe is adhesively fixed in the composite function port through the second adhesive.

6. The tip head assembly according to claim 1, characterized in that, The water injection port is formed on the side surface of the distal end housing, at least two water injection pipes are provided, and at least two water injection pipes are jointly installed in the water injection port; Or, two water injection ports are provided, the distal end housing has opposite first side and second side, one water injection port is respectively provided on the first side and the second side, at least two water injection pipes are provided, and at least one water injection pipe is installed in each water injection port; Or, the water injection port is formed on the end surface of the distal end housing, at least two water injection pipes are provided, and at least two water injection pipes are jointly installed in the water injection port; Or, two water injection ports are provided, one of the water injection ports is formed on the side surface of the distal end housing, and the other water injection port is formed on the end surface of the distal end housing, at least two water injection pipes are provided, and at least one water injection pipe is installed in each water injection port.

7. The tip head assembly according to claim 1, wherein The distal end head assembly further includes a pressure measuring unit and / or a temperature measuring unit, the distal end housing is further provided with a first mounting hole, and the measuring head of the pressure measuring unit and / or the temperature measuring unit is arranged in the first mounting hole.

8. The tip head assembly according to claim 1, wherein, The distal end head assembly further includes a camera unit, the distal end housing is further provided with a second mounting hole, and the camera unit is arranged in the second mounting hole.

9. The tip component according to claim 8, characterized in that, The distal end head assembly further includes a lighting unit, the distal end housing is further provided with a third mounting hole, the lighting unit is arranged in the third mounting hole, and the lighting unit is arranged in cooperation with the camera unit; And / or, the distal end housing is made of a colorless transparent material.

10. An endoscope, characterized in that, Comprising a handle, an insertion tube, a snake bone and the distal end head assembly according to any one of claims 1 to 9, the handle, the insertion tube, the snake bone and the distal end head assembly are connected in sequence.

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