CN110547751A - Button lever, button, and endoscope system - Google Patents
Button lever, button, and endoscope system Download PDFInfo
- Publication number
- CN110547751A CN110547751A CN201910841826.3A CN201910841826A CN110547751A CN 110547751 A CN110547751 A CN 110547751A CN 201910841826 A CN201910841826 A CN 201910841826A CN 110547751 A CN110547751 A CN 110547751A
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- Prior art keywords
- button
- sliding fit
- rod
- push button
- guide hole
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00066—Proximal part of endoscope body, e.g. handles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00066—Proximal part of endoscope body, e.g. handles
- A61B1/00068—Valve switch arrangements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/0011—Manufacturing of endoscope parts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00131—Accessories for endoscopes
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biophysics (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Manufacturing & Machinery (AREA)
- Endoscopes (AREA)
Abstract
The invention provides a button rod, a button and an endoscope system, and belongs to the technical field of medical instruments. The endoscope system solves the problems that a button of an existing endoscope system is extremely easy to wear and poor in hand feeling. The button rod comprises a rod body, wherein a sliding fit part is arranged on the rod body, a plurality of pits for forming a fluid film are arranged on the outer surface of the sliding fit part, and the pits are uniformly distributed on the outer surface of the sliding fit part; the button comprises a sleeve and a button rod, wherein a guide hole is formed in the sleeve, a sliding fit part is arranged in the guide hole in a penetrating mode and is in sliding fit with the guide hole, and a reset piece for resetting the button rod after the button rod is pressed down is arranged between the button rod and the sleeve; the endoscope system comprises an endoscope main machine and an endoscope body, wherein the button is arranged on the endoscope body. The invention can form fluid film between the concave pit and the inner surface of the guide hole through the arranged concave pit, and plays the roles of improving friction and increasing lubricity.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and relates to a button rod, a button and an endoscope system.
Background
The endoscope system is widely applied to the medical field and comprises an endoscope main machine and an endoscope body, wherein a water-air button and an attraction button are arranged on the endoscope body, the water-air button realizes the functions of supplying water and air by pressing or bouncing up a button rod, and the attraction button realizes the attraction function by pressing or bouncing up the button rod. In the process of pressing or bouncing, the button rod and the button valve barrel form a friction pair, and the friction performance of the button rod and the button valve barrel plays a decisive role in the hand feeling and the service life of the button.
The conventional water-air button friction pair mainly comprises two parts, as shown in fig. 1, one part is friction between the first O-ring 104, the second O-ring 105 and the third O-ring 106 and a water-air button valve cylinder 107, and the other part is friction between a water-air button rod 101 and a water-air button rod support 103. The friction between the water vapor button rod 101 and the water vapor button rod support 103 has a larger influence on the hand feeling, and when the friction performance between the water vapor button rod 101 and the water vapor button rod support 103 is poor, the operation button has obvious metal scraping feeling, is easy to wear and has poor hand feeling. As shown in fig. 2, the suction button friction pair is formed by rubbing the suction button rod 201 and the suction button valve sleeve 203, and when the friction coefficient between the two is large, the button operation feeling is poor, and the suction function is easily deteriorated due to abrasion.
Although friction between the friction pairs can be reduced by finishing (e.g., polishing) the contact surfaces, the surface roughness cannot be increased infinitely and the processing cost increases more with higher precision, due to the influence of material properties and processing precision. When the surface reaches a certain degree of smoothness, the wear resistance of the surface no longer increases with the smoothness of the surface.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a button rod, a button and an endoscope system with improved friction performance.
The purpose of the invention can be realized by the following technical scheme:
The button rod comprises a rod body and is characterized in that the rod body is provided with a sliding fit part, the outer surface of the sliding fit part is provided with a plurality of pits for forming a fluid film, and the pits are uniformly distributed on the outer surface of the sliding fit part.
In the above-mentioned push-button stem, the sum of the surface areas of the outer surfaces of the sliding fit portions occupied by the plurality of recesses is 10% to 15% of the total surface area of the sliding fit portions. And if the surface area of each pit occupying the outer surface of the sliding fit part is S, the total surface area of the sliding fit part is S, and the sum of the surface areas of the n pits occupying the outer surface of the sliding fit part is n multiplied by S, the ratio formula between the n and the S is n multiplied by S, wherein n multiplied by S is 10-15%.
In the above-described push button lever, the sum of the surface areas of the outer surfaces of the sliding fit portions occupied by the plurality of recesses is 15% of the total surface area of the sliding fit portions.
In the above-described push button lever, the slidably engaging portion has a cylindrical shape, and the depth direction of the recess extends in the radial direction of the slidably engaging portion. The slip fit may also be of other shapes, such as a polygonal prism or the like.
in the button rod, the cross section of the concave pit perpendicular to the depth direction is circular, and the ratio of the depth of the concave pit to the aperture of the concave pit is 0.01-0.1. The contact stress and the forming ability of the lubricating film will be affected according to the fine structure of the material surface; the fine structure can change the contact stress distribution of the surface of the material, thereby realizing the synergistic effect of lubrication and abrasion resistance. A larger pocket means a higher roughness of the outer surface of the slip fit portion and a greater ability of the pocket to accommodate wear debris, so a pocket with a moderate depth to diameter ratio balances chip holding performance and surface roughness. Each dimple acts as a lubricated bearing, thereby generating additional hydrodynamic pressure that can significantly increase the load bearing capacity around the dimple. Pits with a suitable depth to diameter ratio can significantly reduce the coefficient of friction of the contact surface. The cross-section of the pit perpendicular to its depth may be rectangular, oval, triangular, etc., in addition to being circular.
In the above-described push button lever, the ratio of the depth of the depression to the aperture of the depression is 0.05.
In the button stem, the depth of the concave pit is 0.01mm-0.03 mm.
In the above-mentioned button stem, the depth of the depression is 0.01 mm. When the depth of the pit is 0.01mm, the aperture of the pit is 0.2 mm.
In the button rod, the rod body is made of a permanent magnet material, namely the rod body is a permanent magnet.
In the above-mentioned push button lever, an inner surface of the recess is a spherical surface.
The button is characterized by comprising a sleeve and the button rod, wherein the sleeve is internally provided with a guide hole, a sliding fit part arranged on the button rod is arranged in the guide hole in a penetrating manner and is in sliding fit with the guide hole, and a reset piece used for resetting the button rod after the button rod is pressed is arranged between the button rod and the sleeve. Since the minute dimples are provided on the outer surface of the sliding fit portion, a fluid film is formed between the dimples and the inner surface of the guide hole, thereby improving friction and increasing lubricity.
In the above button, the concave pit is filled with a lubricating liquid.
In the button, a plurality of ferroferric oxide particles with the diameter of 5-15 nanometers are arranged in the lubricating liquid, and the surfaces of the ferroferric oxide particles are coated with a layer of active agent molecular layer.
The ferroferric oxide particles are uniformly distributed in the lubricating liquid, and the ferroferric oxide particles do Brownian motion in the lubricating liquid and form a ferroferric oxide fluid film with solid and liquid of the lubricating liquid, the ferroferric oxide fluid film is a nano composite material, solid and liquid can not be separated under the magnetic action of a rod body made of a permanent magnetic material, and the lubricating liquid with solid and liquid integrated can not be separated from the pits under the magnetic action of the rod body.
The solid-liquid integrated lubricating liquid plays a role in lubricating in the pits.
Coating an active agent molecular layer on the surface of the ferroferric oxide particle in a physical and chemical reaction mode: the preparation method comprises the steps of taking a silane coupling agent as an activating agent, putting ferroferric oxide particles into a silane coupling agent solution, carrying out ultrasonic vibration dispersion for 20 minutes, heating to 70 ℃, stirring for 20 minutes, and coating the surface of the ferroferric oxide particles with an activating agent molecular layer. In the button, the diameter of the ferroferric oxide particles is 10 nanometers.
In the above button, the return member is a spring. In order to prevent the spring from falling off, the spring is sleeved on the button rod, the rod head is arranged on the button rod, one end of the spring abuts against the rod head, and the other end of the spring abuts against the sleeve.
The endoscope system comprises an endoscope host and an endoscope body, wherein the button is arranged on the endoscope body.
Compared with the prior art, the invention has the following advantages: the plurality of tiny pits are formed in the outer surface of the sliding fit part, a fluid film is formed between the pits and the inner surface of the guide hole, the effects of improving friction and increasing lubricity are achieved, a friction pair formed by the sliding fit part and the sleeve is protected, and the service life is prolonged.
Drawings
Fig. 1 is a sectional view of a water vapor button provided in the background art.
Fig. 2 is a sectional view of an attraction button provided in the background art.
Fig. 3 is a cross-sectional view of a button stem in accordance with an embodiment of the present invention.
Fig. 4 is a sectional view of a button stem in the second embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a sliding fit portion in the first embodiment of the invention.
Fig. 6 is an enlarged schematic view of the invention at a in fig. 3.
Fig. 7 is a cross-sectional view of a third embodiment of the push button of the present invention.
FIG. 8 is a cross-sectional view of a fourth embodiment of the push button of the present invention.
Fig. 9 is a schematic structural diagram of an endoscope system in the fifth embodiment of the present invention.
In the figure, 1, a rod body; 2. a slide-fit portion; 3. a pit; 4. a sleeve; 5. a guide hole; 6. a reset member; 7. an endoscope host; 8. an endoscope body; 9. a button; 10. a club head; 11. a button valve cartridge.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Example one
The push button stick shown in fig. 3 includes a stick body 1, and the stick body 1 has a sliding fit portion 2 coaxially disposed thereon, and the sliding fit portion 2 is located at an upper portion of the stick body 1. The outer surface of the sliding fit part 2 is provided with a plurality of pits 3 for forming a fluid film, and as shown in fig. 5, the pits 3 are uniformly distributed on the outer surface of the sliding fit part 2. The sliding fit portion 2 is cylindrical, and the depth direction of the recess 3 extends in the radial direction of the sliding fit portion 2. As shown in fig. 6, the inner surface of the dimple 3 is a spherical surface having a radius r, and the depth of the dimple 3 is l, l < r. The ratio of the depth of the pits 3 to the diameter of the pits 3 is 0.05, the depth of the pits 3 is 0.01mm, and the diameter of the pits 3 is 0.2 mm. Wherein, the rod body 1 is processed by permanent magnet material.
The surface area of each concave pit 3 occupying the outer surface of the sliding fit part 2 is S, the total surface area of the sliding fit part 2 is S, the shape of each concave pit 3 is the same, the size of each concave pit 3 is equal, the sum of the surface areas of n concave pits 3 occupying the outer surface of the sliding fit part 2 is n multiplied by S, and the ratio formula of the surface area of n concave pits 3 occupying the outer surface of the sliding fit part 2 to the total surface area of the outer surface of the sliding fit part 2 is n × S/S15%.
In this embodiment, the dimples 3 can be formed by the following methods:
The first method is as follows: and laser processing, namely processing the pits 3 with the depth of 0.01mm and the diameter of 0.02mm by adopting a laser surface fine processing technology, wherein the occupied area of the pits 3 accounts for 15 percent of the total surface area. In this way, the pockets 3, when lubricated with liquid, are similar to micro-dynamic bearings, storing lubricant in the case of boundary friction; it may also act to collect wear particles in the case of dry friction.
The second method comprises the following steps: in the sputtering etching process, ion beams from an ion source are accelerated, shaped and the like and then focused on the surface of a material, momentum is transferred to atoms on the surface of the sliding matching part 2, and the atoms on the surface of the sliding matching part 2 are etched to form fine pits 3.
The third method comprises the following steps: and (3) ultrasonic machining, namely applying ultrasonic vibration with the vibration frequency f being more than 16kHZ along the radial direction of the working surface of the cylinder by using a single tool head or a matrix tool head or a honeycomb tool head, wherein the pressure is more than 5N/cm2, and forming pits 3 with consistent depth on the surface of the sliding fit part 2.
The method is as follows: in the fine electric discharge machining, the surface of a cylinder is corroded by electric spark, instantaneous spark discharge is generated between a machine table and the sliding fit part 2 through electrodes, the sliding fit part 2 is machined through electric corrosion, and fine pits 3 are formed on the surface of the sliding fit part 2.
The fifth mode is as follows: and (3) performing micro electrolytic machining, shielding the surface of the cylinder without generating the pits 3 by a pad printing or transfer printing technology, corroding the exposed part of the surface of the cylinder, and controlling the corrosion depth of the pits 3 by controlling the corrosion time.
Example two
The push button stick shown in fig. 4 includes a stick body 1, and the stick body 1 has a sliding fit portion 2 coaxially disposed thereon, and the sliding fit portion 2 is located at a lower portion of the stick body 1. The outer surface of the sliding fit part 2 is provided with a plurality of pits 3 for forming a fluid film, and the pits 3 are uniformly distributed on the outer surface of the sliding fit part 2. The sliding fit portion 2 is cylindrical, and the depth direction of the recess 3 extends in the radial direction of the sliding fit portion 2. The inner surface of the pit 3 is a spherical surface, the ratio of the depth of the pit 3 to the aperture of the pit 3 is 0.1, the depth of the pit 3 is 0.01mm, and the aperture of the pit 3 is 0.1 mm.
In the present embodiment, the ratio of the surface area of the outer surface of the sliding-fit portion 2 occupied by the n dimples 3 to the total surface area of the outer surface of the sliding-fit portion 2 is expressed by n × S/S as 10%.
Wherein, the rod body 1 is also processed by permanent magnet material.
The processing mode can be realized by selecting the processing mode of the first embodiment.
EXAMPLE III
The button shown in fig. 7 is a water-air button, and includes a sleeve 4 and a button rod, a guide hole 5 is provided in the sleeve 4, a sliding fit portion 2 provided on the button rod is inserted into the guide hole 5 and is in sliding fit with the guide hole 5, and a reset member 6 for resetting the button rod after the button rod is pressed is provided between the button rod and the sleeve 4. The push button lever in this embodiment has a structure as shown in fig. 1, and a plurality of dimples 3 are uniformly distributed on the outer surface of the sliding fit portion 2, and a fluid film is formed between the dimples 3 and the inner surface of the guide hole 5, thereby improving friction and increasing lubricity.
In this embodiment, methyl silicone oil is provided in the pit 3 as a lubricating liquid, a plurality of ferroferric oxide particles having a diameter of 10 nm are provided in the methyl silicone oil, and the surface of the ferroferric oxide particles is coated with an active agent molecular layer composed of a hydrocarbon compound. Ferroferric oxide particles are uniformly distributed in the methyl silicone oil, and do brownian motion continuously, and the solid-liquid separation phenomenon can not occur under the action of external force. Meanwhile, the button rod is made of a permanent magnet material, the sleeve 4 is made of a stainless steel material, and the ferroferric oxide particles are attached to the pit 3 under the action of magnetic force, so that loss of the ferroferric oxide particles is avoided.
As shown in fig. 7, the restoring member 6 is a spring. In order to prevent the spring from falling off, the spring is sleeved on the button rod, meanwhile, the rod head 10 is arranged on the button rod, one end of the spring is abutted against the rod head 10, and the other end of the spring is abutted against the sleeve 4.
As shown in fig. 7, a button valve barrel 11 is disposed at the lower portion of the sleeve 4, a button rod penetrates through the sleeve 4 and then extends into the button valve barrel 11, four joints are disposed on the button valve barrel 11, three seal rings are disposed on the button rod, the seal rings divide an inner cavity of the button valve barrel 11 into a plurality of sections, and switching of water and air is achieved by pressing the button rod.
Example four
The button shown in fig. 8 is a water-air button, and includes a sleeve 4 and a button rod, a guide hole 5 is provided in the sleeve 4, a sliding fit portion 2 provided on the button rod is inserted into the guide hole 5 and is in sliding fit with the guide hole 5, and a reset member 6 for resetting the button rod after the button rod is pressed is provided between the button rod and the sleeve 4. The push button lever in this embodiment has a structure as shown in fig. 2, and a plurality of dimples 3 are uniformly distributed on the outer surface of the sliding fit portion 2, and a fluid film is formed between the dimples 3 and the inner surface of the guide hole 5, thereby improving friction and increasing lubricity.
In this embodiment, methyl silicone oil is provided in the pit 3 as a lubricating liquid, a plurality of ferroferric oxide particles having a diameter of 10 nm are provided in the methyl silicone oil, the surface of the ferroferric oxide particles is coated with an active agent molecular layer, the active agent molecular layer is made of a hydrocarbon compound, and if the active agent is a silane coupling agent. Ferroferric oxide particles are uniformly distributed in the methyl silicone oil, and do brownian motion continuously, and the solid-liquid separation phenomenon can not occur under the action of external force. Meanwhile, the button rod is made of a permanent magnet material, the sleeve 4 is made of a stainless steel material, and the ferroferric oxide particles are attached to the pit 3 under the action of magnetic force, so that loss of the ferroferric oxide particles is avoided.
As shown in fig. 7, the restoring member 6 is a spring. In order to prevent the spring from falling off, the spring is sleeved on the button rod, meanwhile, the rod head 10 is arranged on the button rod, one end of the spring is abutted against the rod head 10, and the other end of the spring is abutted against the sleeve 4.
EXAMPLE five
The endoscope system shown in fig. 9 includes an endoscope main body 7 and an endoscope body 8, and the endoscope body 8 is provided with a button 9 according to the third embodiment; or a button 9 in the fourth embodiment; or the buttons 9 in the third embodiment and the fourth embodiment are simultaneously arranged.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. The button rod comprises a rod body (1) and is characterized in that a sliding fit portion (2) is arranged on the rod body (1), pits (3) used for forming a fluid film are formed in the outer surface of the sliding fit portion (2), and the pits (3) are uniformly distributed on the outer surface of the sliding fit portion (2).
2. The button stem according to claim 1, wherein the sum of the surface areas of the outer surfaces of the sliding engagement portions (2) occupied by the plurality of recesses (3) is 10 to 15% of the total surface area of the sliding engagement portions (2).
3. Push button stem according to claim 1 or 2, wherein the cross-section of the indentation (3) perpendicular to its depth direction is circular, the ratio of the depth of the indentation (3) to the aperture of the indentation (3) being 0.01-0.1.
4. A button stem according to claim 3, characterised in that the ratio of the depth of the indentation (3) to the aperture of the indentation (3) is 0.05.
5. A button stem according to claim 3, characterised in that the depth of the indentation (3) is 0.01-0.03 mm.
6. The push button stem according to claim 1 or 2, characterized in that said stem (1) is machined from a permanent magnetic material.
7. A push button comprising a sleeve (4) and a push button stem as defined in any of claims 1 to 6, said sleeve (4) having a guide hole (5) therein, a sliding fit portion (2) provided on the push button stem being inserted into the guide hole (5) and slidably fitted into the guide hole (5), and a reset member (6) for resetting the push button stem when the push button stem is pressed being provided between the push button stem and the sleeve (4).
8. The push button according to claim 7, wherein a lubricant is provided in the recess (3) formed in the outer surface of the sliding fit portion (2), a plurality of ferroferric oxide particles having a diameter of 5-15 nm are provided in the lubricant, and the surface of the ferroferric oxide particles is coated with a layer of active agent molecules.
9. Push button according to claim 7 or 8, wherein the return element (6) is a spring.
10. An endoscope system comprising an endoscope main body (7) and an endoscope body (8), characterized in that the endoscope body (8) is provided with a push button (9) according to any one of claims 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910841826.3A CN110547751A (en) | 2019-09-06 | 2019-09-06 | Button lever, button, and endoscope system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910841826.3A CN110547751A (en) | 2019-09-06 | 2019-09-06 | Button lever, button, and endoscope system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110547751A true CN110547751A (en) | 2019-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910841826.3A Pending CN110547751A (en) | 2019-09-06 | 2019-09-06 | Button lever, button, and endoscope system |
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| Country | Link |
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| CN (1) | CN110547751A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111449608A (en) * | 2020-04-02 | 2020-07-28 | 重庆金山医疗技术研究院有限公司 | Endoscope body and method for improving lubricating performance of endoscope body |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2125755U (en) * | 1992-06-19 | 1992-12-23 | 冯逸骅 | Combined magnetic oil sealing |
| JP2011030866A (en) * | 2009-08-04 | 2011-02-17 | Hoya Corp | Endoscope |
| CN104665752A (en) * | 2013-11-28 | 2015-06-03 | 富士胶片株式会社 | Switching Valve Unit And Endoscope Apparatus |
| CN107429848A (en) * | 2015-03-11 | 2017-12-01 | 伊格尔工业股份有限公司 | Slide unit |
-
2019
- 2019-09-06 CN CN201910841826.3A patent/CN110547751A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2125755U (en) * | 1992-06-19 | 1992-12-23 | 冯逸骅 | Combined magnetic oil sealing |
| JP2011030866A (en) * | 2009-08-04 | 2011-02-17 | Hoya Corp | Endoscope |
| CN104665752A (en) * | 2013-11-28 | 2015-06-03 | 富士胶片株式会社 | Switching Valve Unit And Endoscope Apparatus |
| CN107429848A (en) * | 2015-03-11 | 2017-12-01 | 伊格尔工业股份有限公司 | Slide unit |
Non-Patent Citations (1)
| Title |
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| 蔡仁良，顾伯勤，宋鹏云: "《过程装备密封技术》", 31 May 2006 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111449608A (en) * | 2020-04-02 | 2020-07-28 | 重庆金山医疗技术研究院有限公司 | Endoscope body and method for improving lubricating performance of endoscope body |
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Application publication date: 20191210 |