A three-dimensional laparoscope with high assembly stability

Abstract

The present invention discloses a three-dimensional laparoscope with high assembly stability, which relates to the technical field of endoscopes. The three-dimensional laparoscope with high assembly stability comprises: 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 connector, wherein the connector is arranged on the optical path tube at intervals, and the connector confines the optical path tube in the outer tube by glue, and the connector comprises a supporting plate, and the supporting plate has an optical path hole for accommodating the optical path tube. The three-dimensional laparoscope with high assembly stability fixes the optical path tube to the inside of the outer tube by the connectors arranged at intervals, and only glue is needed to fix the connector to the inside of the outer tube. 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 can conveniently separate the outer tube and the connector during rework, thereby facilitating maintenance.

Description

Technical Field

[0001] The present 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. Under normal circumstances, the light guide cannot fill the gap, which will cause the optical path tube to shake when the product is in use, thereby causing deviation in the two-path optical imaging. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the present invention provides a three-dimensional laparoscope with high assembly stability, which solves the problem in the existing technology 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 at intervals on the optical path tube, 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, the glue will automatically fill the gap between the support sheet and the outer tube due to the action of gravity and the surface tension of the glue.

[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. The sealing tube is provided with pressure deformation parts at intervals. The pressure deformation parts are used to reduce the gap of assembly and improve the stability of assembly.

[0010] Furthermore, it includes an eyepiece cover, one end of the outer tube is fixedly mounted on one end of the eyepiece cover, the end of the light path tube close to the eyepiece cover is longer than the outer tube, and the light path tube and the eyepiece cover are connected via an end positioning piece;

[0011] The end of the system tube close to the eyepiece cover is longer than the sealing tube;

[0012] The end positioning member comprises:

[0013] a metal ring, welded to one end of the system tube located inside the eyepiece housing and disposed close to the sealing tube;

[0014] A pressing piece, which can press the system pipe into the sealing pipe through the metal ring;

[0015] 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.

[0016] 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.

[0017] Furthermore, a limiting groove is provided on the inner wall of the arc-shaped chamber of the C-shaped frame, and a ridge is provided on the outer surface of the system tube to match the limiting groove. The ridge cooperates with the limiting groove to limit the rotation of the system tube.

[0018] A friction-increasing surface is provided on 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.

[0019] Furthermore, the optical path tubes are provided in 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.

[0020] The present invention has the following beneficial effects:

[0021] (1) The three-dimensional laparoscope with high assembly stability fixes the optical path tube to the inside of the outer tube by setting connectors at intervals. It only needs to use glue to fix the connector to the inside of the outer tube. 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 can easily separate the outer tube and the connector during repair, thereby facilitating maintenance.

[0022] (2) The three-dimensional laparoscope with high assembly stability achieves adjustment of the fitting clearance by making a small extrusion deformation on the surface of the optical path tube and controlling the deformation amount by the applied force. The micro-deformation makes the contact surface between the tubes smaller, thus generating less friction. This method can significantly reduce the assembly clearance and improve the assembly stability.

[0023] (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 easy to repair.

[0024] 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

[0025] Figure 1 This is an appearance diagram of the present invention;

[0026] Figure 2 Schematic diagram of the internal structure of the present invention;

[0027] Figure 3 This is an orthographic projection diagram of the internal structure of the outer tube in Example 1 of the present invention;

[0028] Figure 4 Schematic diagram of the structure of the connecting member in the first embodiment of the present invention;

[0029] Figure 5 This is a diagram showing the fixing of the optical path tube through the end positioning member and the connecting member in the first embodiment of the present invention;

[0030] Figure 6 A schematic diagram of an additional limiting recessed area in a connecting member in Embodiment 1 of the present invention;

[0031] Figure 7 This is a schematic diagram of adding a limiting convex area to the sealing tube in Example 1 of the present invention;

[0032] Figure 8 A schematic diagram of the sealing tube of the present invention being pressed against the system tube after the pressure deformation portion is added;

[0033] Figure 9 Schematic diagram of the position of the ridge of the present invention;

[0034] Figure 10 This is a schematic structural diagram of the C-shaped frame of the present invention;

[0035] Figure 11 This is a schematic diagram of the present invention's tablet being removed from the system pipe;

[0036] Figure 12 This is an orthographic projection diagram of the internal structure of the outer tube in Example 2 of the present invention;

[0037] Figure 13 This is a schematic structural diagram of a connecting piece in the second embodiment of the present invention.

[0038] 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-transmitting 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 piece; 85. pressing plate; 9. connecting piece; 91. supporting piece; 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

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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.

[0041] The following is based on Figures 1-13 A three-dimensional laparoscope with high assembly stability provided by an embodiment of the present invention is described.

[0042] Example 1:

[0043] 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. Two groups of optical path tubes 14 are provided. The two optical systems of the optical three-dimensional laparoscope are independently encapsulated in the corresponding optical path tubes 14, and then the optical path tubes 14 with the optical systems are assembled into the outer tube 11 so that the optical path tubes 14 are wrapped in the outer tube 11.

[0044] In order to improve the stability of the optical tube 14 in the outer tube 11, a connecting piece 9 is also provided. The connecting piece 9 includes a supporting plate 91. The supporting plate 91 has an optical path hole 92 for accommodating the optical tube 14. During assembly, the optical tube 14 should be stuck in the optical path hole 92.

[0045] 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.

[0046] Optional, such as Figure 5 As shown, the maximum width of the connecting piece 9 is 10 mm, and the distance between two adjacent connecting pieces 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 curvature that must be generated during operation of the outer tube 11 is not affected.

[0047] Although the above-mentioned connecting member 9 can fix the spatial position of the optical tube 14 in the outer tube 11, it cannot limit the rotation of the optical tube 14. Therefore, a structure for limiting the rotation of the optical 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 (in fact, the limiting convex area 22 is 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).

[0048] Preferably, the glue 10 is medical epoxy resin.

[0049] Combine Figure 2 and Figure 4 Preferably, a beam through hole 93 is provided on one side of the support plate 91, and the beam through hole 93 is for the optical fiber 12 to pass through, and the optical fiber 12 is used to illuminate the optical system.

[0050] Based on the three-dimensional laparoscope with high assembly stability in this embodiment, the present invention further provides an assembly method for a three-dimensional laparoscope with high assembly stability, comprising the following steps:

[0051] Step 1: Clamp each support sheet 91 onto the optical 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;

[0052] Step 2: Apply 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;

[0053] 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 .

[0054] 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 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.

[0055] like Figures 1-4 As shown, in essence, the above-mentioned optical path tube 14 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, and the objective lens is assembled in the objective lens tube 6. After the image of the eyepiece tube 3, the rotating lens group 5, the objective lens tube 6 and the prism 7 are adjusted, they are glued and assembled in the system tube 4. An eyepiece cover 1 is also provided. The end of the outer tube 11 close to the eyepiece tube 3 is fixed on the eyepiece cover 1. A 0° end, a 30° slope end 111 or a 45° slope end is also provided at the end of the outer tube 11 away from the eyepiece cover 1.

[0056] 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 applying glue. 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 applying glue. The disadvantage is that the system tube 4 cannot be repaired after applying glue, which leads to scrapping.

[0057] Therefore, the present invention forms a pressure deformation portion 21 (such as Figure 8 , the pressure-deformation portion 21 is a recessed groove). By controlling the amount of deformation by the applied force, the clearance is adjusted. This minimizes the contact surface between the system tube 4 and the slightly deformed sealing tube 2, resulting in less friction. This method significantly reduces assembly clearance and improves assembly stability. The specific principle is that when pressure is applied to the sealing tube 2, the recessed pressure-deformation portion 21 of the sealing tube 2 undergoes slight axial and radial deformation. This radial deformation exerts pressure on the system tube 4, reducing the gap between them.

[0058] Preferably, the pressure deformation portion 21 avoids the limiting convex area 22 and is preferably located between two limiting convex areas 22 .

[0059] 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.

[0060] Due to the requirements of minimally invasive optical endoscopy, the outer tube 11 of a typical scope is approximately 10mm in diameter. To balance the diameters of the optical components and the optical fiber 12, the center-to-center distance between the two optical systems of a three-dimensional scope is limited to approximately 5mm. Specifically, the center-to-center distance between the two optical tubes 14 is a maximum of 5mm, and the diameters of the optical components (objective lens, image-transmitting lens assembly 5) are approximately 3.5mm-4mm. The end of the two-way optical tube 14 near the eyepiece housing 1 is typically secured to the system tube 4 by a dispensing process. However, this dispensing process makes the glue difficult to disassemble, preventing repairs during normal assembly and resulting in scrapping.

[0061] Therefore, the end positioning member 8 is provided, combined with Figure 2 、 Figure 5 as well as Figure 9 As shown, the two optical tubes 14 are fixed to the eyepiece housing 1 by end positioning members 8 through screw crimping. Specifically, the end of the optical tube 14 near the eyepiece housing 1 is longer than the outer tube 11, that is, the optical tube 14 protrudes from the outer tube 11, and the end positioning members 8 are used to position the portion of the optical tube 14 protruding from the outer tube 11 on the eyepiece housing 1. In addition, the system tube 4 is fixed during the fixing process. Therefore, the end of the system tube 4 near the eyepiece housing 1 is longer than the sealing tube 2, that is, the end of the system tube 4 near the eyepiece housing 1 protrudes from the sealing tube 2.

[0062] Specifically, the end positioning member 8 includes a metal ring 83 and a pressing piece 84 .

[0063] First, the metal ring 83 is welded to the end of the system tube 4 that protrudes from the sealing tube 2. However, it does not reach the very end of the system tube 4. Its position is aligned with the end of the sealing tube 2 and is located inside the eyepiece housing 1. The pressing piece 84 is an annular piece that can be pressed against the metal ring 83. Thus, the pressing piece 84 presses the system tube 4 into the sealing tube 2 through the metal ring 83. In addition, a step portion 23 is provided at the end of the sealing tube 2 near the objective lens to prevent the system tube 4 from being pressed out of the sealing tube 2 by the metal ring 83, thereby achieving the system tube 4 being limited at both ends within the sealing tube 2.

[0064] In order to further enable the pressing piece 84 to be pressed tightly 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. The C-shaped frame 81 is also used to generate pressure on the pressing piece 84.

[0065] 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. Figure 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.

[0066] 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 cover 1. Combined with the above-mentioned setting of the 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.

[0067] 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.

[0068] Preferably, a pressing plate 85 is provided on the adjacent 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 .

[0069] 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 no glue is used to connect the sealing tube 2 and the system tube 4, thereby ensuring that the three-dimensional laparoscope will not be subjected to temperature shock during the sterilization process, causing 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, further improving the imaging accuracy of the objective lens and the eyepiece.

[0070] Furthermore, the optical path tube 14 is encapsulated in the outer tube 11 by using 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, and 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.

[0071] Example 2:

[0072] Reference Figure 12-13The difference between this embodiment and the first embodiment is that it further includes a connecting member 9, which includes a supporting plate 91. The supporting plate 91 has an optical path hole 92 for accommodating the optical path tube 14; a glue groove 94 is provided on one side of the supporting plate 91. The glue groove 94 is positioned upward and glue 10 is dripped into the outer tube 11. When the glue groove 94 is positioned downward, due to the action of gravity and the surface tension of the glue 10, the glue 10 will automatically fill the gap between the supporting plate 91 and the outer tube 11, thereby fixing the position of the supporting plate 91 and locking the position of the optical path tube 14.

[0073] 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 groove provided along the outer arc surface of the support sheet 91 or a rough area provided along the outer arc surface of the support sheet 91; whether it is a dot groove or a rough area, it provides a larger flow space for the glue 10, thereby improving the fastening performance of the glue 10.

[0074] 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 supporting plate 91 .

[0075] Based on the three-dimensional laparoscope with high assembly stability in this embodiment, the present invention further provides an assembly method for a three-dimensional laparoscope with high assembly stability, comprising the following steps:

[0076] Step 1: Clamp each support sheet 91 onto the optical 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;

[0077] Step 2: Place the assembly in a direction where glue can be dispensed, with the glue groove 94 facing upwards, and place a certain amount of glue 10 in the glue groove 94;

[0078] Step 3: Place the assembly into the outer tube 11 with the glue groove 94 facing upwards;

[0079] Step 4: Flip the outer tube 11 so that the glue groove 94 is facing downward. Due to the effects of gravity and the surface tension of the glue 10, the glue 10 will automatically fill the gap between the support sheet 91 and the outer tube 11.

[0080] 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 .

[0081] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0082] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. 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 by: include: outer tube (11); An optical tube (14), wherein the optical tube (14) has an optical system therein, the optical tube (14) is wrapped in an outer tube (11), and the optical tube (14) includes a system tube (4) and a sealing tube (2) located outside the system tube (4); A plurality of connecting members (9), the connecting members (9) being arranged at intervals on the optical tube (14), the connecting members (9) confining the optical tube (14) within the outer tube (11) via glue (10), the connecting members (9) comprising a supporting sheet (91), the supporting sheet (91) having an optical path hole (92) for accommodating the optical tube (14); It also includes an eyepiece outer cover (1), one end of the outer tube (11) is fixed to one end of the eyepiece outer cover (1), the end of the light path tube (14) close to the eyepiece outer cover (1) is longer than the outer tube (11), and the light path tube (14) and the eyepiece outer cover (1) are connected via an end positioning member (8); One end of the system tube (4) close to the eyepiece housing (1) is longer than the sealing tube (2); The end positioning member (8) comprises: A metal ring (83) is welded to one end of the system tube (4) located inside the eyepiece housing (1) and is disposed close to the sealing tube (2); A pressing piece (84), wherein the pressing piece (84) is capable of pressing the system pipe (4) tightly into the sealing pipe (2) through 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.

2. The 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. The 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, the glue (10) is automatically filled into the gap between the support sheet (91) and the outer tube (11) due to the action of gravity and the surface tension of the glue (10).

4. The three-dimensional laparoscope with high assembly stability according to claim 3, characterized in that: The outer arc surface of the support piece (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 piece (91) or a rough area provided along the outer arc surface of the support piece (91).

5. A three-dimensional laparoscope with high assembly stability according to any one of claims 1 to 4, characterized in that: 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 in an area of ​​the outer wall of the light path tube (14) opposite to the limiting concave area (911).

6. The three-dimensional laparoscope with high assembly stability according to claim 5, characterized in that: The sealing tube (2) is provided with pressure deformation parts (21) at intervals, and the pressure deformation parts (21) are used to reduce assembly gaps and improve assembly stability.

7. The three-dimensional laparoscope with high assembly stability according to claim 1, 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) that is longer than the sealing tube (2), and the C-shaped frame (81) is locked in the eyepiece cover (1) by screws, and the C-shaped frame (81) is used to generate pressure on the pressing piece (84).

8. The three-dimensional laparoscope with high assembly stability according to claim 7, 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).

9. The three-dimensional laparoscope with high assembly stability according to claim 8, 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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