Hard endoscope
Through all-metal welding process and metallization treatment, the problem of inconvenient detachment and cleaning of the adhesive layer during the high-temperature and high-pressure steam sterilization process is solved, and the effect of efficient sterilization and easy cleaning is achieved.
Patent Information
- Application Number
- CN202421005720.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-10
AI Technical Summary
During the high-temperature and high-pressure steam sterilization process of existing endoscopes, the adhesive layer is prone to detachment, resulting in damage to the optical components and inconvenient cleaning of the front-end window glass.
All-metal welding process is used to replace the traditional adhesive process, and the outer circular surface of the front and rear window glass is metallized, and the mirror steel pipe is divided into pipe section one and pipe section two for welding to ensure the sealing and pressure resistance of the structure. ability.
It achieves thorough sterilization under high temperature and high pressure conditions of 134°C 2Ba, extends the service life of the endoscope, and facilitates cleaning of the front-end window glass.
Smart Images
Figure CN222487336U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field related to endoscopes, in particular to a rigid endoscope. Background Art
[0002] According to the development of endoscopes in China over the past 30 years, the disinfection and sterilization methods for endoscopes in my country include liquid immersion, o-phthalaldehyde disinfection, and plasma sterilization. Liquid immersion methods such as glutaraldehyde immersion have a disinfection time of 4 hours and a sterilization requirement of 10 hours, which has low time efficiency and makes the utilization rate of endoscopic surgery low. While the use of 0.53% o-phthalaldehyde for 5 minutes can achieve a high level of disinfection effect on the endoscope, it has not met the sterilization requirements. The advantages of plasma sterilization are that the surface disinfection and sterilization of the endoscope is relatively thorough and efficient, and the disadvantages are that the deep and slender small holes of the blind hole of the endoscope are not thoroughly disinfected, and the damage to the parts of the endoscope body with strong water absorption is relatively large, especially the illumination part of the endoscope and the light transmittance of the illumination part of the organic glue bonding part is greatly affected, which greatly shortens the service life of the endoscope. Therefore, the ideal disinfection and sterilization method is to use high-temperature and high-pressure steam sterilization at 134℃ and 230KP pressure, with a sterilization time of more than 5 minutes and thorough sterilization. The most ideal sterilization method for endoscopes is to eliminate pathogen infection, take a short time, have high efficiency, and sterilize thoroughly. High temperature and high pressure steam sterilization is the standard for endoscopes in the European Union.
[0003] In the existing technology, most of the manufacturers in my country use organic glue such as epoxy resin to bond the front window glass of the endoscope to the metal frame and the steel pipe part of the mirror body. Since the thermal expansion coefficient of the glass window is 7PPm / ℃, the expansion coefficient of the 304 steel pipe is 17PPm / ℃, and the pressure sterilization environment of 2 atmospheres produces a huge expansion difference, if high-temperature and high-pressure steam sterilization is used, it is very easy to cause the adhesive layer to stick and detach on the surface, and the penetration of steam water molecules will cause the optical components to debond, fog and other damage to the optical system.
[0004] Therefore, the welding process between metal and non-metal is adopted for the front window glass of the endoscope, the steel tube of the mirror body, the metal frame of the window glass, and the eyepiece cover and the rear window glass. Since the inorganic metal welding is the mutual penetration between molecules, it blocks the erosion between steam molecules and has excellent pressure resistance, and has the conditions for high temperature and high pressure sterilization at 134℃2Ba, which is conducive to improving the sterilization effect. However, through the welding process, due to the slender steel tube of the mirror body, it is easy to cause the front window glass and the metal frame to be welded with the steel tube of the mirror body, which is not conducive to the cleaning of the inside of the front window glass. Utility Model Content
[0005] The utility model aims to overcome the disadvantage of the inconvenience of cleaning the interior of the front end window glass of the endoscope in the prior art, and provides a rigid endoscope which is convenient for cleaning the interior of the front end window glass.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A rigid endoscope comprises a main body and a mirror body steel tube, wherein a base and an eyepiece assembly are arranged in the main body, the base is fixedly connected to the main body, an optical system is arranged in the mirror body steel tube, the mirror body steel tube is located at one end of the main body, the mirror body steel tube comprises a tube section one and a tube section two, one end of the tube section one is located in the main body and passes through the center of the base and is elastically connected to the eyepiece assembly, the tube section one is located at one end of the base and is fixedly connected to the base, the eyepiece assembly is located at the other end of the base, the other end of the tube section one is located outside the main body and is fixedly connected to one end of the tube section two, the other end of the tube section two is provided with a metal frame and a front end window glass corresponding to the optical system, the front end window glass is fixedly connected to the tube section two through the metal frame, the other end of the main body is sealed and connected to an eyepiece cover, and a rear end window glass corresponding to the eyepiece assembly is fixed in the eyepiece cover.
[0008] The endoscope comprises a main body and a mirror body steel tube, wherein a base and an eyepiece assembly are arranged in the main body, wherein the base is fixedly connected to the main body, wherein an optical system is arranged in the mirror body steel tube, wherein the mirror body steel tube is located at one end of the main body, wherein the mirror body steel tube comprises a tube section one and a tube section two, wherein one end of the tube section one is located in the main body and elastically connected to the eyepiece assembly after passing through the center of the base, wherein the tube section one is located at one end of the base and fixedly connected to the base, wherein the eyepiece assembly is located at the other end of the base, wherein the other end of the tube section one is located outside the main body and fixedly connected to one end of the tube section two, wherein a metal frame and a front end window glass corresponding to the optical system are arranged at the other end of the tube section two, wherein the front end window glass is fixedly connected to the tube section two via the metal frame, wherein an eyepiece cover is sealed at the other end of the main body, wherein a rear end window glass corresponding to the eyepiece assembly is fixed in the eyepiece cover. The endoscope manufacturing process comprises the following steps: step 1, metallizing the outer circumferential surfaces of the front window glass and the rear window glass respectively; step 2, selecting a metal material with a similar expansion coefficient to the front window glass to process a metal skeleton, and the metal material may be a kovar alloy; step 3, connecting and fixing the pipe section 1 to the base by welding; step 4, connecting and fixing the front window glass to the metal skeleton by welding; step 5, welding the front window glass and the metal skeleton to the pipe section 2, and cleaning them, the length of the pipe section 2 being about 15 mm; step 6, connecting and fixing the rear window glass to the eyepiece cover by welding; step 7, welding and fixing the cleaned pipe section 2 to the pipe section 1; step 8, packaging the endoscope. The utility model firstly metalizes the outer circumferential surfaces of the front window glass and the rear window glass respectively to ensure smooth penetration of metal ions; then, all-metal welding is performed between the front window glass and the pipe section 2 and the metal frame on the mirror body steel pipe, between the eyepiece cover and the rear window glass, and between the pipe section 1 on the mirror body steel pipe and the base to replace the traditional gluing process; since inorganic metal welding is mutual penetration between molecules, the erosion between steam molecules is blocked and the utility model has excellent pressure resistance, and the utility model has the high-temperature and high-pressure sterilization conditions of 134°C 2Ba, which is beneficial to improving the sterilization effect; at the same time, the mirror body steel pipe is divided into the pipe section 1 and the pipe section 2 for welding, so as to avoid the problem that the front window glass and the metal frame are welded to the mirror body steel pipe due to the slenderness of the mirror body steel pipe, which is not conducive to the cleaning of the inside of the front window glass, thereby achieving the purpose of facilitating the cleaning of the inside of the front window glass.
[0009] Preferably, the metal frame is provided with an inner hole 1 matching the front window glass, the front window glass is welded and fixed to the metal frame through the inner hole 1, and the gap between the inner hole 1 and the front window glass is greater than or equal to 0.05 mm, so as to facilitate the smooth penetration of solder during welding.
[0010] Preferably, the center of the eyepiece cover is provided with an inner hole 2 which matches the rear window glass, the rear window glass is welded and fixed to the eyepiece cover through the inner hole 2, and the gap between the inner hole 2 and the rear window glass is greater than or equal to 0.05 mm, so as to facilitate the smooth penetration of solder during welding.
[0011] Preferably, the main body includes a main pipe, on which a light source interface connected to the inside is provided, the light source interface is located on the side wall of one end of the main pipe, an optical fiber seat is connected to the light source interface, one end of the pipe section 1 passes through one end of the main pipe and is located inside the main pipe and fixedly connected to the base, the portion of the pipe section 1 that passes through the main pipe is sealed and fixedly connected to the main pipe, the other end of the main pipe is provided with an eyepiece pipe, the main pipe is detachably and sealedly connected to the eyepiece cover through the eyepiece pipe, the base is fixedly connected to the inner side wall of the main pipe, and the eyepiece assembly is located in the eyepiece pipe. The light source interface is connected to an external light source through the optical fiber seat, which is beneficial to improving the clarity of the endoscope during operation and improving safety; the portion of the pipe section 1 that passes through the main pipe is sealed and fixedly connected to the main pipe, which is beneficial to ensuring the sealing and connection firmness between the mirror body steel pipe and the main body and is beneficial to extending the service life.
[0012] Preferably, one end of the base is close to the light source interface and is provided with a through hole matching the pipe segment 1, the other end of the base is far from the light source interface and is provided with a mounting groove connected to the through hole, one end of the pipe segment 1 passes through the through hole and is located in the mounting groove, the portion of the pipe segment 1 passing through the through hole is fixed to the base by welding, a pressing lens barrel is provided on the end of the pipe segment 1 located in the mounting groove, one end of the pressing lens barrel is sleeved on the pipe segment 1, the other end of the pressing lens barrel is sleeved with a spring, and the pressing lens barrel is elastically connected to the eyepiece assembly by the spring. The portion of the pipe segment 1 on the mirror body steel pipe passing through the through hole is fixed to the base by welding to ensure the firmness of the seal; the pressing lens barrel is elastically connected to the eyepiece assembly by the spring, which is convenient for the operator to adjust the position of the eyepiece assembly.
[0013] Preferably, the eyepiece assembly includes an adjustment ring, a fixing ring and an eyepiece body, one end of the eyepiece body is close to the rear window glass, the other end of the eyepiece body is far from the rear window glass, the adjustment ring is fixedly sleeved on the end of the eyepiece body far from the rear window glass through the fixing ring, the eyepiece body is installed in the open end of the installation groove through the adjustment ring, the fixing ring is located on one side of the adjustment ring, and the other side of the adjustment ring corresponding to the eyepiece body is elastically connected to the pressure barrel through a spring. The adjustment ring is fixed and sleeved on the eyepiece body through the fixing ring to ensure the coaxiality of the adjustment ring and the eyepiece body, and then the operator fine-tunes the position of the adjustment ring through external operation, thereby playing a role in adjusting the position of the eyepiece body.
[0014] The beneficial effects of the utility model are as follows: the traditional gluing process is replaced by the all-metal welding method, and the high-temperature and high-pressure sterilization conditions of 134°C 2Ba are achieved, which is beneficial to improving the sterilization effect; at the same time, the mirror body steel pipe is divided into the pipe section one and the pipe section two for welding, thereby avoiding the problem that the front window glass and the metal frame are not conducive to the cleaning of the inside of the front window glass after welding with the mirror body steel pipe due to the slender mirror body steel pipe, thereby achieving the purpose of facilitating the cleaning of the inside of the front window glass; facilitating the smooth penetration of solder during welding; and ensuring the firmness of the seal. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the utility model;
[0016] Figure 2 , Figure 3 and Figure 4 It is a schematic diagram of the installation structure of different forms of front window glass;
[0017] Figure 5 It is a schematic diagram of the structure when the front window glass or the rear window glass is positioned by the fixture;
[0018] Figure 6 yes Figure 5 A magnified view of the structure at center A;
[0019] Figure 7 It is a schematic diagram of the installation structure of the rear window glass.
[0020] In the figure: 1. Main body, 2. Steel tube of the mirror body, 3. Base, 4. Eyepiece assembly, 5. Optical system, 6. Tube section 1, 7. Tube section 2, 8. Metal frame, 9. Front window glass, 10. Eyepiece cover, 11. Rear window glass, 12. Inner hole 1, 13. Inner hole 2, 14. Main pipe, 15. Light source interface, 16. Fiber optic holder, 17. Eyepiece tube, 18. Through hole, 19. Mounting slot, 20. Pressing barrel, 21. Spring, 22. Adjusting ring, 23. Fixing ring, 24. Eyepiece body, 25. Clamping piece, 26. Positioning slot. DETAILED DESCRIPTION
[0021] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.
[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4In the described embodiment, a rigid endoscope comprises a main body 1 and a mirror body steel tube 2, wherein a base 3 and an eyepiece assembly 4 are arranged in the main body 1, the base 3 is fixedly connected to the main body 1, an optical system 5 is arranged in the mirror body steel tube 2, the mirror body steel tube 2 is located at one end of the main body 1, the mirror body steel tube 2 comprises a tube section 1 6 and a tube section 2 7, one end of the tube section 1 6 is located in the main body 1 and passes through the center of the base 3 and is elastically connected to the eyepiece assembly 4, the tube section 1 6 is located at one end of the base 3 and is fixedly connected to the base 3, the eyepiece assembly 4 is located at the other end of the base 3, the other end of the tube section 1 6 is located outside the main body 1 and is fixedly connected to one end of the tube section 2 7, the other end of the tube section 2 7 is provided with a metal skeleton 8 and a front end window glass 9 corresponding to the optical system 5, the front end window glass 9 is fixedly connected to the tube section 2 7 through the metal skeleton 8, the other end of the main body 1 is sealedly connected to an eyepiece cover 10, and a rear end window glass 11 corresponding to the eyepiece assembly 4 is fixed in the eyepiece cover 10.
[0023] like Figure 2 , Figure 3 and Figure 4 As shown, the metal frame 8 is provided with an inner hole 12 matching the front window glass 9, and the front window glass 9 is welded and fixed to the metal frame 8 through the inner hole 12. The gap between the inner hole 12 and the front window glass 9 is greater than or equal to 0.05 mm, which is convenient for the smooth penetration of solder during welding.
[0024] like Figure 7 As shown, the center of the eyepiece cover 10 is provided with an inner hole 13 matching the rear window glass 11, and the rear window glass 11 is welded and fixed to the eyepiece cover 10 through the inner hole 13. The gap between the inner hole 13 and the rear window glass 11 is greater than or equal to 0.05 mm, which facilitates the smooth penetration of solder during welding.
[0025] like Figure 1 As shown, the main body 1 includes a main pipe 14, on which a light source interface 15 connected to the interior is provided, the light source interface 15 is located on a side wall at one end of the main pipe 14, an optical fiber seat 16 is connected to the light source interface 15, one end of a pipe section 6 passes through one end of the main pipe 14 and is located in the main pipe 14 and fixedly connected to the base 3, the portion of the pipe section 6 passing through the main pipe 14 is sealed and fixedly connected to the main pipe 14, an eyepiece pipe 17 is provided at the other end of the main pipe 14, the main pipe 14 is detachably and sealedly connected to the eyepiece cover through the eyepiece pipe 17, the base 3 is fixedly connected to the inner side wall of the main pipe 14, and the eyepiece assembly 4 is located in the eyepiece pipe 17.
[0026] One end of the base 3 is close to the light source interface 15 and is provided with a through hole 18 matching the tube segment 6. The other end of the base 3 is away from the light source interface 15 and is provided with a mounting groove 19 connected to the through hole 18. One end of the tube segment 6 passes through the through hole 18 and is located in the mounting groove 19. The part of the tube segment 6 that passes through the through hole 18 is fixed to the base 3 by welding. A pressing barrel 20 is provided on one end of the tube segment 6 located in the mounting groove 19. One end of the pressing barrel 20 is sleeved on the tube segment 6. A spring 21 is sleeved on the other end of the pressing barrel 20. The pressing barrel 20 is elastically connected to the eyepiece assembly 4 through the spring 21.
[0027] The eyepiece assembly 4 includes an adjustment ring 22, a fixing ring 23 and an eyepiece body 24. One end of the eyepiece body 24 is close to the rear window glass 11, and the other end of the eyepiece body 24 is away from the rear window glass 11. The adjustment ring 22 is fixedly sleeved on the end of the eyepiece body 24 away from the rear window glass 11 through the fixing ring 23. The eyepiece body 24 is installed in the open end of the mounting groove 19 through the adjustment ring 22. The fixing ring 23 is located on one side of the adjustment ring 22, and the other side corresponding to the adjustment ring 22 is elastically connected to the pressure lens barrel 20 through the spring 21.
[0028] The endoscope manufacturing process includes the following steps:
[0029] Step 1: metallizing the outer circumferential surfaces of the front window glass 9 and the rear window glass 11 respectively;
[0030] Step 2, select a metal material with a similar expansion coefficient to the front window glass 9 to process the metal frame 8;
[0031] Step 3: The pipe section 1 6 and the base 3 are connected and fixed by welding;
[0032] Step 4: The front window glass 9 is connected and fixed to the metal frame 8 by welding;
[0033] Step 5, welding the front window glass 9 and the metal frame 8 to the pipe section 2 7, and cleaning them;
[0034] Step 6: The rear window glass 11 and the eyepiece cover 10 are connected and fixed by welding;
[0035] Step 7, welding and fixing the cleaned pipe section 2 7 and pipe section 1 6;
[0036] Step eight, encapsulate the endoscope.
[0037] like Figure 5As shown, both the left and right ends of the front window glass 9 and the rear window glass 11 are light-transmitting surfaces. In step 1, during the metallization process, the two clamping pieces 25 on the fixture are used to clamp the light-transmitting surfaces of the left and right ends of the front window glass 9 or the rear window glass 11 for positioning. This design is conducive to ensuring that the outer cylindrical surfaces of the front window glass 9 and the rear window glass 11 can be fully metallized, and under the positioning protection of the fixture, the light-transmitting surfaces are not polluted by metallization, ensuring that the light transmittance is not affected; the left and right clamping pieces 25 of the fixture should ensure a coaxiality of about 0.02 mm.
[0038] like Figure 5 and Figure 6 As shown, a positioning groove 26 matching the light-transmitting surface is provided at the center of the clamping piece 25, and the depth L from the bottom of the positioning groove 26 to its open end is equal to 1 / 10 of the thickness of the front window glass 9 or the rear window glass 11, and the angle B formed between the side wall of the positioning groove 26 and the bottom of the positioning groove 26 is 135°. The firmness of the positioning and clamping of the front window glass 9 and the rear window glass 11 is ensured, and the maximum outer circumferential surface area is exposed as much as possible, so as to ensure smooth penetration of metal ions in a vacuum state and realize metallization of the outer surface of the window; the light-transmitting surface is not affected by the positioning protection of the clamp.
[0039] like Figure 1 As shown, in step 3, the connection between the pipe section 1 6 and the base 3 is fixed by brazing or laser welding. In steps 4 and 6, lead-free solder or 4:1 gold-tin solder is used for welding to ensure the firmness of the seal.
[0040] The utility model firstly metalizes the outer circumferential surfaces of the front-end window glass 9 and the rear-end window glass 11 respectively to ensure smooth penetration of metal ions; then, the front-end window glass 9 and the pipe section 2 7 and the metal frame 8 on the mirror body steel tube 2, the eyepiece cover 10 and the rear-end window glass 11, and the pipe section 1 6 on the mirror body steel tube 2 and the base 3 are all-metal welded to replace the traditional gluing process. Since inorganic metal welding is mutual penetration between molecules, it blocks the erosion between steam molecules and has excellent pressure resistance, and has the ability to achieve high-temperature and high-pressure sterilization conditions of 134°C 2Ba, so as to achieve the purpose of improving the sterilization effect; at the same time, the mirror body steel tube 2 is welded into the pipe section 1 6 and the pipe section 2 7, so as to avoid the problem that the front window glass and the metal frame 8 are welded to the mirror body steel tube 2 due to the slenderness of the mirror body steel tube 2, which is not conducive to the cleaning of the inside of the front-end window glass 9.
Claims
1. A rigid endoscope, characterized in that: The invention comprises a main body (1) and a mirror body steel tube (2), wherein a base (3) and an eyepiece assembly (4) are arranged in the main body (1), wherein the base (3) is fixedly connected to the main body (1), wherein an optical system (5) is arranged in the mirror body steel tube (2), wherein the mirror body steel tube (2) is located at one end of the main body (1), wherein the mirror body steel tube (2) comprises a pipe section 1 (6) and a pipe section 2 (7), wherein one end of the pipe section 1 (6) is located in the main body (1) and passes through the center of the base (3) and then is elastically connected to the eyepiece assembly (4), wherein the pipe section 1 (6) is located at one end of the base (3) and is fixedly connected to the base (3). The eyepiece assembly (4) is located at the other end of the base (3), the other end of the tube section 1 (6) is located outside the main body (1) and is fixedly connected to one end of the tube section 2 (7), the other end of the tube section 2 (7) is provided with a metal frame (8) and a front window glass (9) corresponding to the optical system (5), the front window glass (9) is fixedly connected to the tube section 2 (7) via the metal frame (8), the other end of the main body (1) is sealedly connected to an eyepiece sleeve (10), and a rear window glass (11) corresponding to the eyepiece assembly (4) is fixed in the eyepiece sleeve (10).
2. A rigid endoscope according to claim 1, characterized in that: The metal frame (8) is provided with an inner hole (12) matching the front window glass (9); the front window glass (9) is welded and fixed to the metal frame (8) via the inner hole (12); and a gap between the inner hole (12) and the front window glass (9) is greater than or equal to 0.05 mm.
3. A rigid endoscope according to claim 1, characterized in that: The center of the eyepiece cover (10) is provided with an inner hole (13) matching the rear window glass (11); the rear window glass (11) is welded and fixed to the eyepiece cover (10) via the inner hole (13); and a gap between the inner hole (13) and the rear window glass (11) is greater than or equal to 0.05 mm.
4. A rigid endoscope according to claim 1, characterized in that: The main body (1) comprises a main pipe (14), the main pipe (14) is provided with a light source interface (15) which is in communication with the interior thereof, the light source interface (15) is located on a side wall at one end of the main pipe (14), an optical fiber seat (16) is connected to the light source interface (15), one end of the pipe section (6) passes through one end of the main pipe (14) and is located inside the main pipe (14) and fixedly connected to the base (3), the portion of the pipe section (6) which passes through the main pipe (14) is sealed and fixedly connected to the main pipe (14), the other end of the main pipe (14) is provided with an eyepiece pipe (17), the main pipe (14) is detachably and sealedly connected to an eyepiece cover via the eyepiece pipe (17), the base (3) is fixedly connected to the inner side wall of the main pipe (14), and the eyepiece assembly (4) is located inside the eyepiece pipe (17).
5. A rigid endoscope according to claim 4, characterized in that: One end of the base (3) is close to the light source interface (15) and is provided with a through hole (18) matching the tube segment 1 (6); the other end of the base (3) is away from the light source interface (15) and is provided with a mounting groove (19) connected to the through hole (18); one end of the tube segment 1 (6) passes through the through hole (18) and is located in the mounting groove (19); the portion of the tube segment 1 (6) passing through the through hole (18) is fixed to the base (3) by welding; a pressing lens barrel (20) is provided on one end of the tube segment 1 (6) located in the mounting groove (19); one end of the pressing lens barrel (20) is sleeved on the tube segment 1 (6); a spring (21) is sleeved on the other end of the pressing lens barrel (20); the pressing lens barrel (20) is elastically connected to the eyepiece assembly (4) via the spring (21).
6. A rigid endoscope according to claim 5, characterized in that: The eyepiece assembly (4) comprises an adjustment ring (22), a fixing ring (23) and an eyepiece body (24); one end of the eyepiece body (24) is close to the rear window glass (11), and the other end of the eyepiece body (24) is away from the rear window glass (11); the adjustment ring (22) is fixedly sleeved on the end of the eyepiece body (24) away from the rear window glass (11) through the fixing ring (23); the eyepiece body (24) is installed in the open end of the installation groove (19) through the adjustment ring (22); the fixing ring (23) is located on one side of the adjustment ring (22); and the other side of the adjustment ring (22) corresponding to the eyepiece body (24) is elastically connected to the pressure lens barrel (20) through the spring (21).