Three-dimensional laparoscope with high assembly stability

Abstract

The invention discloses a three-dimensional laparoscope with high assembly stability, and relates to the technical field of endoscopes. The three-dimensional laparoscope with high assembly stability comprises an outer tube; an optical system is arranged in the optical path tube, and the optical path tube is wrapped in the outer tube; the three-dimensional laparoscope comprises an outer tube, a light path tube and connecting pieces, the connecting pieces are arranged on the light path tube at intervals, the connecting pieces limit the light path tube in the outer tube through glue, each connecting piece comprises a supporting piece, and a light path via hole for containing the light path tube is formed in each supporting piece. And the connecting piece only needs to be fixed in the outer pipe by using glue. According to the mode, the gap between the connecting piece and the outer pipe is small, movement of the optical path pipe is limited, the stability of the optical system is guaranteed, the outer pipe and the connecting piece can be conveniently separated in the repairing process, and therefore overhauling is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of endoscopes, in particular to a three-dimensional laparoscope with high assembly stability. Background Art

[0002] The three-dimensional laparoscope has two sets of optical path tubes. Due to the setting of the two sets of optical path tubes, there is usually a suspended part between the optical path tube and the outer tube. A light guide (optical fiber) passes through the suspended part. Generally, the light guide cannot fill the gap, which will cause the optical path tube to shake when the product is in use, thereby causing deviations in the two-path optical imaging. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides a three-dimensional laparoscope with high assembly stability, which solves the problem in the prior art that the optical path tube shakes to a certain extent during use, thereby causing deviation in the two-path optical imaging.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a three-dimensional laparoscope with high assembly stability, comprising: an outer tube; an optical path tube, wherein the optical path tube has an optical system, and the optical path tube is wrapped in the outer tube; and a connecting piece, wherein the connecting piece is arranged on the optical path tube at intervals, and the connecting piece confines the optical path tube in the outer tube by glue, and the connecting piece includes a supporting plate, and the supporting plate has an optical path hole for accommodating the optical path tube.

[0005] Furthermore, the glue is dispensed on the outer arc surface of the support sheet to bond the support sheet to the inner surface of the outer tube.

[0006] Furthermore, a glue groove is provided on one side of the support sheet. When the glue groove is facing upward, glue is dripped into the outer tube. When the glue groove is facing downward, due to the effect of gravity and the surface tension of the glue, the glue will automatically fill the gap between the support sheet and the outer tube.

[0007] Furthermore, the outer arc surface of the support piece is provided with a tension release area, and the tension release area is: a dot-shaped groove provided on the outer arc surface of the support piece or a rough area provided along the outer arc surface of the support piece.

[0008] Furthermore, a limiting concave area is provided on the inner wall of the light path hole, and a limiting convex area is provided on the outer wall of the light path tube in an area opposite to the limiting concave area.

[0009] Furthermore, the optical path tube includes a system tube and a sealing tube located outside the system tube, and the sealing tube is provided with pressure deformation parts at intervals, and the pressure deformation parts are used to reduce the gap of assembly and improve the stability of assembly.

[0010] Furthermore, it also includes an eyepiece outer cover, one end of the outer tube is fixedly arranged at one end of the eyepiece outer cover, one end of the optical path tube close to the eyepiece outer cover is longer than the outer tube, and the optical path tube and the eyepiece outer cover are connected by an end positioning piece; One end of the system tube close to the eyepiece cover is longer than the sealing tube; The end positioning member comprises: A metal ring, the metal ring is welded to one end of the system tube located inside the eyepiece housing and is disposed close to the sealing tube; A pressing piece, which can press the system pipe into the sealing pipe through the metal ring; The inner arc surface of one end of the sealing tube away from the metal ring is provided with a step portion, and the step portion is used to limit the end of the system tube close to the objective lens to form a state in which both ends of the system tube are positioned.

[0011] Furthermore, the end positioning member also includes a C-shaped frame, the arc-shaped chamber of the C-shaped frame is used to accommodate one end of the system tube that is longer than the sealing tube, the C-shaped frame is locked in the eyepiece cover by screws, and the C-shaped frame is used to generate pressure on the pressing piece.

[0012] Furthermore, a limiting groove is provided on the inner wall of the arc-shaped chamber of the C-shaped frame, and a convex ridge matching the limiting groove is provided on the outer surface of the system pipe, and the convex ridge cooperates with the limiting groove to limit the rotation of the system pipe; A friction-increasing surface is arranged at one end of the metal ring close to the sealing tube, and the friction-increasing surface of the metal ring is pressed on the sealing tube to limit the rotation of the sealing tube.

[0013] Furthermore, the optical path tubes are provided with two groups, and a pressing plate is provided on one side where the two C-shaped frames are close to each other, and the two groups of pressing plates are connected by screws.

[0014] The present invention has the following beneficial effects: (1) The three-dimensional laparoscope with high assembly stability fixes the optical path tube to the inside of the outer tube by means of spaced connectors. The connectors only need to be fixed to the inside of the outer tube using glue. This method not only limits the movement of the optical path tube due to the small gap between the connector and the outer tube, thereby ensuring the stability of the optical system, but also enables the outer tube and the connector to be easily separated during repair, thereby facilitating maintenance.

[0015] (2) The three-dimensional laparoscope with high assembly stability adjusts the matching clearance by making a small extrusion deformation on the surface of the optical path tube and controlling the deformation amount by applying a force. The micro-deformation makes the contact surface between the tubes smaller, so the friction force generated is smaller. This method can significantly reduce the assembly clearance and improve the stability of the assembly.

[0016] (3) The three-dimensional laparoscope with high assembly stability is fixed by setting an end positioning piece to fix the end of the optical path tube close to the eyepiece cover. Compared with the spot glue fixation in the prior art, it is easy to disassemble and repair.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an appearance diagram of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 It is an orthographic projection diagram of the internal structure of the outer tube in the first embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the connecting member in the first embodiment of the present invention; Figure 5 A diagram showing the fixing of the optical path tube through the end positioning piece and the connecting piece in the first embodiment of the present invention; Figure 6 A schematic diagram of adding a limiting concave area to the connecting member in the first embodiment of the present invention; Figure 7 This is a schematic diagram of adding a limiting convex area to the sealing tube in the first embodiment of the present invention; Figure 8 A schematic diagram of the sealing tube of the present invention being pressed against the system tube after a pressure deformation portion is added thereto; Fig. 9 is a schematic diagram of the position of the ridge of the present invention; Fig.10 It is a structural schematic diagram of the C-shaped frame of the present invention; Fig.11 A schematic diagram of the present invention wherein the tablet is removed from the system pipe; Fig.12 It is an orthographic projection diagram of the internal structure of the outer tube in the second embodiment of the present invention; Fig.13 It is a schematic diagram of the structure of the connecting piece in the second embodiment of the present invention.

[0019] In the figure, 1, eyepiece cover; 2, sealing tube; 21, pressure deformation part; 22, limiting convex area; 23, stepped part; 3, eyepiece tube; 4, system tube; 41, convex ridge; 5, image transfer lens group; 6, objective tube; 7, prism; 8, end positioning piece; 81, C-shaped frame; 811, limiting groove; 82, top connecting plate; 83, metal ring; 831, friction-increasing surface; 84, pressing plate; 85, pressing plate; 9, connecting piece; 91, supporting plate; 911, limiting concave area; 92, light path through hole; 93, light beam through hole; 94, glue groove; 10, glue; 11, outer tube; 111, 30° inclined end; 12, optical fiber; 14, light path tube. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] According to the following Figure 1-Figure 13 A three-dimensional laparoscope with high assembly stability provided by an embodiment of the present invention is described.

[0023] Embodiment 1: See also Figure 1-Figure 5 An embodiment of the present invention provides a three-dimensional laparoscope with high assembly stability, including an outer tube 11 and an optical path tube 14. The optical path tube 14 is provided in two groups. The two optical systems of the optical three-dimensional laparoscope are independently packaged in the corresponding optical path tubes 14, and then the optical path tube 14 with the optical system is assembled into the outer tube 11 so that the optical path tube 14 is wrapped in the outer tube 11.

[0024] In order to improve the stability of the optical path tube 14 in the outer tube 11, a connecting member 9 is also provided. The connecting member 9 includes a supporting plate 91 having an optical path hole 92 for accommodating the optical path tube 14. The optical path tube 14 should be stuck in the optical path hole 92 during assembly.

[0025] like Figure 3 As shown, glue 10 is dispensed on the outer arc surface of the support sheet 91 to bond the support sheet 91 to the inner surface of the outer tube 11. Since the gap between the support sheet 91 and the outer tube 11 is small, the movement of the optical path tube 14 is limited, thereby ensuring the stability of the optical system.

[0026] Optional, such as Figure 5 As shown, the maximum width of the connecting member 9 is 10 mm, and the distance between two adjacent connecting members 9 is 30 mm-60 mm. Therefore, due to the spacing arrangement, on the one hand, the weight of the three-dimensional laparoscope can be reduced, and on the other hand, the bending degree that must be generated by the outer tube 11 during operation is not affected.

[0027] Although the above-mentioned connecting member 9 can fix the spatial position of the optical path tube 14 in the outer tube 11, it cannot limit the rotation of the optical path tube 14. Therefore, a structure for limiting the rotation of the optical path tube 14 is provided, as follows: Figure 5-Figure 7 As shown, a limiting concave area 911 is provided on the inner wall of the light path hole 92, and a limiting convex area 22 is provided on the outer wall of the light path tube 14 in an area opposite to the limiting concave area 911, thereby limiting the rotation of the light path tube 14 in the light path hole 92 and ensuring the stability of the light path tube 14 (the limiting convex area 22 is actually located on the sealing tube 2, and during production, it should be bonded to the outer surface of the sealing tube 2 using a long medical polyethylene strip with an adhesive).

[0028] Preferably, the glue 10 is medical epoxy resin.

[0029] Combination Figure 2 and Figure 4 Preferably, a beam through hole 93 is provided on one side of the support plate 91, and the optical fiber 12 passes through the beam through hole 93, and the optical fiber 12 is used to illuminate the optical system.

[0030] Based on the three-dimensional laparoscope with high assembly stability in this embodiment, the present invention further provides an assembly method of a three-dimensional laparoscope with high assembly stability, comprising the following steps: Step 1: clamp each support sheet 91 on the optical path tube 14 through the optical path holes 92, and pass the optical fiber 12 through each beam hole 93, so that the support sheet 91, the optical path tube 14 and the optical fiber 12 form an assembly; Step 2: Add glue 10 to the outer arc surface of the support sheet 91, and insert the assembly support sheet 91 carrying the glue 10 into the outer tube 11; Step 3: The glue 10 is cured to stabilize the positions of the support plate 91 , the optical tube 14 and the optical fiber 12 .

[0031] Therefore, the three-dimensional laparoscope with high assembly stability provided by the embodiment of the present invention ensures that the relative positions of the optical path tube 14 and the outer tube 11 are fixed, thereby ensuring that the imaging does not change after the optical system is impacted by mechanical force.

[0032] like Figure 1-Figure 4 As shown, in essence, the optical path tube 14 mentioned above includes a system tube 4 and a sealing tube 2 located outside the system tube 4, the optical system is assembled inside the system tube 4, the optical system includes an eyepiece tube 3, a rotating lens group 5, an objective lens tube 6 and a prism 7 arranged in sequence, the eyepiece is assembled in the eyepiece tube 3, the objective lens is assembled in the objective lens tube 6, the eyepiece tube 3, the rotating lens group 5, the objective lens tube 6 and the prism 7 are glued and assembled in the system tube 4 after adjusting the image, and an eyepiece cover 1 is also provided, one end of the outer tube 11 close to the eyepiece tube 3 is fixed on the eyepiece cover 1, and a 0° end or a 30° inclined end 111 or a 45° inclined end is also provided at the end of the outer tube 11 away from the eyepiece cover 1.

[0033] In the prior art, in order to achieve a tight fit between the system tube 4 and the sealing tube 2, the problem is solved by reducing the fitting tolerance or using a glue dispensing process. However, reducing the tolerance will increase the friction between the system tube 4 and the sealing tube 2, which will eventually cause the optical path tube 14 to become tighter and tighter during the assembly process. This process has very high requirements on the fit and straightness of the system tube 4 and the sealing tube 2. The tight fit between the system tube 4 and the sealing tube 2 can be improved by using a glue dispensing method. However, the disadvantage is that the system tube 4 cannot be repaired after glue dispensing, which leads to scrapping.

[0034] Therefore, the present invention forms a pressure deformation portion 21 (such as Figure 8 , the pressure deformation part 21 is a concave groove), the deformation amount is controlled by the applied force to adjust the matching clearance, and the contact surface between the system tube 4 and the slightly deformed sealing tube 2 is small, so the friction force generated is small. This method can significantly reduce the assembly clearance and improve the stability of the assembly. The specific principle is that when pressure is applied to the sealing tube 2, the concave pressure deformation part 21 of the sealing tube 2 will undergo slight axial and radial deformation. This radial deformation will generate pressure on the system tube 4 and reduce the gap between the two.

[0035] Preferably, the pressure deformation portion 21 avoids the limiting convex area 22 and is preferably located between two limiting convex areas 22 .

[0036] Therefore, the three-dimensional laparoscope with high assembly stability provided by the embodiment of the present invention can significantly reduce the gap between the sealing tube 2 and the system tube 4 due to the setting of the pressure deformation part 21, improve the assembly stability of the sealing tube 2 and the system tube 4, and then improve the stability of the entire three-dimensional laparoscope.

[0037] Due to the requirements of optical endoscope minimally invasive treatment, the outer tube 11 of a general optical scope will have a diameter of about 10mm. In order to balance the diameter of the optical parts and the diameter of the optical fiber 12, the center distance of the two-way optical system of the three-dimensional optical scope is about 5mm at most, that is, the center distance between the two optical path tubes 14 is 5mm at most, and the diameter of the optical parts (objective lens, image transfer lens group 5) is about 3.5mm-4mm. The end of the two-way optical path tube 14 close to the eyepiece cover 1 is generally limited by the process of dispensing glue to limit the movement of the system tube 4 in the front and rear positions. However, the glue is difficult to disassemble by dispensing glue, and it is impossible to achieve repair during the normal assembly process, resulting in scrapping.

[0038] Therefore, the end positioning member 8 is provided, combined with Figure 2 , Figure 5 as well as Fig. 9As shown, the two optical path tubes 14 are fixed to the eyepiece outer cover 1 by the end positioning piece 8 through screw crimping; specifically, the end of the optical path tube 14 close to the eyepiece outer cover 1 is longer than the outer tube 11, that is, the optical path tube 14 protrudes from the outer tube 11, and the end positioning piece 8 is used to position the part of the optical path tube 14 protruding from the outer tube 11 on the eyepiece outer cover 1; and when fixing, the system tube 4 is selected to be fixed, so the end of the system tube 4 close to the eyepiece outer cover 1 is longer than the sealing tube 2, that is, the end of the system tube 4 close to the eyepiece outer cover 1 protrudes from the sealing tube 2.

[0039] Specifically, the end positioning member 8 includes a metal ring 83 and a pressing sheet 84 .

[0040] First, the metal ring 83 is welded to the end of the system tube 4 protruding from the sealing tube 2, but it does not reach the end of the system tube 4. Its position is aligned with the end of the sealing tube 2 and is located inside the eyepiece cover 1. The pressing piece 84 is an annular sheet body, which can be pressed on the metal ring 83, so that the pressing piece 84 presses the system tube 4 in the sealing tube 2 through the metal ring 83. In addition, a step portion 23 is provided at one end of the sealing tube 2 close to the objective lens, which is used to limit the system tube 4 from being pressed out of the sealing tube 2 by the metal ring 83, so as to achieve the limit position of the two ends of the system tube 4 in the sealing tube 2; In order to further enable the pressing piece 84 to be pressed against the metal ring 83, the end positioning member 8 also includes a C-shaped frame 81. The arc-shaped chamber of the C-shaped frame 81 is used to accommodate the end of the system tube 4 that is longer than the sealing tube 2. Top connecting plates 82 are provided on both sides of the C-shaped frame 81. Threaded holes are provided on the top connecting plates 82. The C-shaped frame 81 is locked in the eyepiece outer cover 1 by the cooperation of screws and threaded holes, and the C-shaped frame 81 is used to generate pressure on the pressing piece 84.

[0041] After the two ends of the sealing tube 2 and the system tube 4 are positioned, in order to prevent the sealing tube 2 and the system tube 4 from rotating relative to each other, a limiting groove 811 is provided on the inner wall of the arc-shaped chamber of the C-shaped frame 81. Fig. 9 The outer surface of the system tube 4 is provided with a ridge 41 adapted to the limiting groove 811. The ridge 41 cooperates with the limiting groove 811 to limit the rotation of the system tube 4, thereby first ensuring that the system tube 4 does not rotate. In addition, in order to ensure that the sealing tube 2 does not rotate, a friction-increasing surface 831 is provided at one end of the metal ring 83 close to the sealing tube 2. The friction-increasing surface 831 of the metal ring 83 is pressed on the sealing tube 2 to limit the rotation of the sealing tube 2.

[0042] Preferably, the friction-increasing surface 831 is a convex dot-shaped pattern, which can increase the friction between the metal ring 83 and the sealing tube 2, thereby limiting the rotation of the sealing tube 2 near one end of the eyepiece outer cover 1. Combined with the setting of the above-mentioned limiting convex area 22 and the limiting concave area 911, the rotation of the optical path tube 14 can be completely limited at multiple points.

[0043] In summary, the sealing tube 2 and the system tube 4 will not produce relative displacement in the axial and circumferential directions, thereby ensuring the relative stability of the sealing tube 2 and the system tube 4. Compared with the spot glue connection in the prior art, the connection method proposed in the present invention can facilitate subsequent repairs.

[0044] Preferably, a pressing plate 85 is provided on one side of the two C-shaped frames 81 , and the two sets of pressing plates 85 are connected by screws, thereby further improving the relative stability of the two optical tubes 14 .

[0045] Therefore, through the packaging process of this design, the two ends of the three-dimensional laparoscope optical path tube 14 are subjected to force and circumferential limit, and the sealing tube 2 and the system tube 4 are connected without using glue, thereby ensuring that the three-dimensional laparoscope will not be subjected to temperature shocks during the sterilization process to cause changes in the imaging of the optical system. In addition, this packaging structure can ensure that the eyepiece tube 3 and the objective lens tube 6 of the optical system are not subjected to force, thereby further improving the imaging accuracy of the objective lens and the eyepiece.

[0046] Furthermore, the optical path tube 14 is encapsulated in the outer tube 11 by the connector 9. The connector 9 can better fix the optical path tube 14. The three-dimensional laparoscope will be affected by impact and vibration during use and transportation. The use of the connector 9 can greatly reduce the amount of glue between the outer tube 11 and the optical path tube 14, thereby facilitating subsequent repairs.

[0047] Embodiment 2: Reference Figure 12-13 The difference between this embodiment and the first embodiment is that it also includes a connecting member 9, which includes a supporting sheet 91, and the supporting sheet 91 has an optical path hole 92 for accommodating the optical path tube 14; a glue groove 94 is set on one side of the supporting sheet 91, and the glue groove 94 is positioned upward and the glue 10 is dripped into the outer tube 11, and the glue groove 94 is positioned downward. Due to the effect of gravity and the surface tension of the glue 10, the glue 10 will automatically fill the gap between the supporting sheet 91 and the outer tube 11, thereby fixing the position of the supporting sheet 91 and locking the position of the optical path tube 14.

[0048] In addition, a tension release area is provided on the outer arc surface of the support sheet 91, and the tension release area is: a dot-shaped groove arranged along the outer arc surface of the support sheet 91 or a rough area arranged along the outer arc surface of the support sheet 91; whether it is a dot-shaped groove or a rough area, it provides a larger flow space for the glue 10, thereby improving the fastening performance of the glue 10.

[0049] Preferably, the light path through hole 92 and the light beam through hole 93 are symmetrically arranged along a line connecting the centers of the two light path through holes 92 to improve the stability of the support sheet 91 .

[0050] Based on the three-dimensional laparoscope with high assembly stability in this embodiment, the present invention further provides an assembly method of a three-dimensional laparoscope with high assembly stability, comprising the following steps: Step 1: clamp each support sheet 91 on the optical path tube 14 through the optical path holes 92, and pass the optical fiber 12 through each beam hole 93, so that the support sheet 91, the optical path tube 14 and the optical fiber 12 form an assembly; Step 2: Place the assembly in a direction where glue can be dispensed, with the glue groove 94 facing upward, and place a certain amount of glue 10 in the glue groove 94; Step 3: Place the assembly into the outer tube 11 with the glue groove 94 facing upward; Step 4: Flip the outer tube 11 so that the glue groove 94 is facing downward. Due to the gravity and the surface tension of the glue 10, the glue 10 will automatically fill into the gap between the support sheet 91 and the outer tube 11. Step 5: The glue 10 is cured to stabilize the positions of the support plate 91 , the optical tube 14 and the optical fiber 12 .

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A three-dimensional laparoscope with high assembly stability, characterized in that: include: outer tube (11); An optical path tube (14), wherein the optical path tube (14) has an optical system therein, and the optical path tube (14) is wrapped in the outer tube (11); A connecting piece (9), the connecting piece (9) being arranged at intervals on the optical path tube (14), the connecting piece (9) confining the optical path tube (14) within the outer tube (11) by means of glue (10), the connecting piece (9) comprising a supporting sheet (91), the supporting sheet (91) having an optical path through hole (92) for accommodating the optical path tube (14).

2. A three-dimensional laparoscope with high assembly stability according to claim 1, characterized in that: The glue (10) is dispensed onto the outer arc surface of the support sheet (91) to bond the support sheet (91) to the inner surface of the outer tube (11).

3. A three-dimensional laparoscope with high assembly stability according to claim 1, characterized in that: A glue groove (94) is provided on one side of the support sheet (91). When the glue groove (94) is positioned upward, glue (10) is dripped into the outer tube (11). When the glue groove (94) is positioned downward, due to the effects of gravity and the surface tension of the glue (10), the glue (10) is automatically filled into the gap between the support sheet (91) and the outer tube (11).

4. A three-dimensional laparoscope with high assembly stability according to claim 3, characterized in that: The outer arc surface of the support sheet (91) is provided with a tension release area, and the tension release area is: a dot-shaped groove provided on the outer arc surface of the support sheet (91) or a rough area provided along the outer arc surface of the support sheet (91).

5. A three-dimensional laparoscope with high assembly stability according to any one of claims 1 to 4, characterized in that: The inner wall of the light path hole (92) is provided with a limiting concave area (911), and the outer wall of the light path tube (14) is provided with a limiting convex area (22) in an area opposite to the limiting concave area (911).

6. A three-dimensional laparoscope with high assembly stability according to claim 5, characterized in that: The optical path tube (14) comprises a system tube (4) and a sealing tube (2) located outside the system tube (4), the sealing tube (2) being provided with pressure deformation portions (21) at intervals, the pressure deformation portions (21) being used to reduce assembly gaps and improve assembly stability.

7. A three-dimensional laparoscope with high assembly stability according to claim 6, characterized in that: It also comprises an eyepiece outer cover (1), one end of the outer tube (11) is fixedly mounted on one end of the eyepiece outer cover (1), one end of the optical path tube (14) close to the eyepiece outer cover (1) is longer than the outer tube (11), and the optical path tube (14) and the eyepiece outer cover (1) are connected via an end positioning member (8); The end of the system tube (4) close to the eyepiece cover (1) is longer than the sealing tube (2); The end positioning member (8) comprises: A metal ring (83), the metal ring (83) being welded to one end of the system tube (4) located inside the eyepiece cover (1) and being arranged close to the sealing tube (2); A pressing sheet (84), wherein the pressing sheet (84) can press the system pipe (4) into the sealing pipe (2) via the metal ring (83); A stepped portion (23) is provided on the inner arc surface of one end of the sealing tube (2) away from the metal ring (83), and the stepped portion (23) is used to limit the end of the system tube (4) close to the objective lens, so as to form a state in which both ends of the system tube (4) are positioned.

8. The three-dimensional laparoscope with high assembly stability according to claim 7, characterized in that: The end positioning member (8) further comprises a C-shaped frame (81), wherein the arc-shaped chamber of the C-shaped frame (81) is used to accommodate an end of the system tube (4) which is longer than the sealing tube (2), and the C-shaped frame (81) is locked in the eyepiece outer cover (1) by means of screws, and the C-shaped frame (81) is used to generate pressure on the pressing piece (84).

9. A three-dimensional laparoscope with high assembly stability according to claim 8, characterized in that: A limiting groove (811) is provided on the inner wall of the arc-shaped chamber of the C-shaped frame (81), and a convex ridge (41) adapted to the limiting groove (811) is provided on the outer surface of the system tube (4), wherein the convex ridge (41) cooperates with the limiting groove (811) to limit the rotation of the system tube (4); A friction-increasing surface (831) is provided at one end of the metal ring (83) close to the sealing tube (2); the friction-increasing surface (831) of the metal ring (83) is pressed against the sealing tube (2) to limit the rotation of the sealing tube (2).

10. The three-dimensional laparoscope with high assembly stability according to claim 9, characterized in that: The optical path tubes (14) are provided in two groups, and a pressing plate (85) is provided on the adjacent side of the two C-shaped frames (81), and the two groups of pressing plates (85) are connected by screws.

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