CN217609570U - Electronic cigarette clamping device for measuring suction resistance - Google Patents
Electronic cigarette clamping device for measuring suction resistance Download PDFInfo
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- CN217609570U CN217609570U CN202221615228.8U CN202221615228U CN217609570U CN 217609570 U CN217609570 U CN 217609570U CN 202221615228 U CN202221615228 U CN 202221615228U CN 217609570 U CN217609570 U CN 217609570U
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Abstract
The utility model provides a inhale and hinder electron cigarette clamping device for measurement includes internal fixation frame subassembly, external seal section of thick bamboo, aerosol filter plate and the filter mantle of coaxial setting in proper order from left to right in the internal fixation frame subassembly, the sealed latex tube of cigarette holder with the internal fixation frame can form the negative pressure chamber, will the sealed latex tube of cigarette holder adsorb in the internal fixation frame, insert the electron cigarette in the sealed latex tube of cigarette holder, close the negative pressure after the sealed latex tube of cigarette holder will recover the original state, will wrap up the electron cigarette holder of various shapes strictly, leak gas when preventing the suction of electron cigarette to realize the electron cigarette of the different cigarette holder shapes of a clamping device centre gripping, thereby be favorable to the inhaling of the electron cigarette of different specification models and hinder and measure.
Description
Technical Field
The utility model relates to an electron cigarette detection area especially relates to a can be used to electron cigarette and inhale and hinder measuring electron cigarette clamping device.
Background
The electronic cigarette is an electronic product simulating a cigarette, is a novel tobacco product, and has the same appearance, smoke, taste and sensation as the cigarette. The evaluation index of the electronic cigarette is similar to that of a cigarette, and the suction resistance is also an important index for evaluating the electronic cigarette. The device for clamping the electronic cigarette holder is required in the process of carrying out the smoking resistance test on the electronic cigarette, and the sealing performance of the clamping device is also related to the accuracy of the smoking resistance test result of the electronic cigarette.
Different from the traditional cigarette, the cigarette holders of the electronic cigarette have a plurality of special-shaped types, and have shapes such as a closing design, a lengthened cigarette holder design and a conical design, and the special-shaped cigarette holders need different electronic cigarette clamps to clamp so as to effectively avoid or reduce the measurement error caused by air leakage.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention is to provide an electronic cigarette clamping device for measuring smoking resistance, which can clamp various special-shaped electronic cigarette holders and prevent air leakage during smoking of the electronic cigarette.
Therefore, the utility model provides a technical scheme does: an electronic cigarette clamping device for measuring suction resistance comprises an inner fixed frame assembly, an outer sealing cylinder, an aerosol filter plate and a filter cover which are coaxially arranged from left to right in sequence;
the internal fixing frame component comprises a cigarette holder sealing latex tube and an internal fixing frame coaxially arranged with the cigarette holder sealing latex tube, and the cigarette holder sealing latex tube and the internal fixing frame can form a negative pressure cavity to adsorb the cigarette holder sealing latex tube in the internal fixing frame;
the outer sealing cylinder is of a hollow structure and consists of an inner fixing frame assembly mounting cavity positioned on the left side and a suction resistance testing cavity positioned on the right side, inner and outer sealing matching surfaces are formed on the wall of the inner fixing frame assembly mounting cavity and the outer surface of the inner fixing frame, a negative pressure joint communicated with the negative pressure cavity is arranged on the wall of the inner fixing frame assembly mounting cavity, and a suction resistance testing joint communicated with the suction resistance testing cavity is arranged on the wall of the suction resistance testing cavity;
the aerosol filter plate is fixed on the right side of the outer sealing cylinder through the filter cover, the inner edge of the filter cover and the outer surface of the outer sealing cylinder form a cylinder cover sealing matching surface, and the center of the filter cover is hermetically provided with a suction airflow joint communicated with the suction resistance testing cavity.
Based on the above, the inner fixing frame comprises a guide sleeve, a first tensioning sleeve, a second tensioning sleeve, a first pressing plate and a second pressing plate, wherein a coaxial circumferential groove is formed in the guide sleeve and is communicated with the negative pressure connector, two symmetrical radial holes are formed in the bottom of the circumferential groove, and the guide sleeve and the wall of the mounting cavity of the inner fixing frame assembly form the inner and outer sealing matching surfaces;
the cigarette holder sealing latex tube is arranged in the inner fixed cavity and can form the negative pressure cavity together with the first tensioning sleeve and the second tensioning sleeve, a controllable gap communicated with the negative pressure cavity is formed at the splicing position of the first tensioning sleeve and the second tensioning sleeve, the guide sleeve is arranged in the annular variable groove, the guide sleeve and the second tensioning sleeve form a coaxial annular gap, and a sleeve groove sealing matching surface is formed by the inner wall of the guide sleeve and the annular variable groove;
the first pressing plate is fixed on the right side of the first tensioning sleeve through a compression screw, and the right end of the cigarette holder sealing latex tube is compressed through the first pressing plate, the compression screw and the first tensioning sleeve;
the second pressing plate is fixed on the left side of the second tensioning sleeve through a compression screw and an adjusting screw, the left end of the cigarette holder sealing latex tube is compressed through the second pressing plate and the compression screw thereof, the adjusting screw and the second tensioning sleeve, and the adjusting screw can control the interval of the annular gap to enable the controllable gap to be communicated with the radial hole.
Based on the above, the suction resistance testing cavity is formed by sequentially connecting a reducing cavity, a suction resistance joint mounting cavity and an expanding cavity from left to right, the diameter of the reducing cavity is gradually reduced to the diameter of the suction resistance joint mounting cavity, the diameter of the expanding cavity is gradually increased from the diameter of the suction resistance joint mounting cavity, and the suction resistance testing joint communicated with the suction resistance joint mounting cavity is arranged on the wall of the suction resistance joint mounting cavity.
Based on the above, the internal fixing frame assembly, the external sealing cylinder, the negative pressure joint, the suction resistance test joint, the filter cover and the suction airflow joint are installed in a threaded or plugging mode.
Based on the above, the inner and outer sealing matching surfaces, the barrel cover sealing matching surface and the sleeve groove sealing matching surface are respectively provided with a sealing ring.
Based on the above, be formed with on the interior outer seal fitting surface and establish the cover and establish twice first sealing washer on the uide bushing, first sealing washer symmetry cover is established the both sides in the circumferential groove.
Based on the above, four second sealing rings are formed on the sealing and matching surface of the sleeve groove, and the second sealing rings are respectively sleeved on the first tensioning sleeve and the second tensioning sleeve by taking the controllable gap as a symmetric center.
Based on the above, when the adjusting screw releases the mouthpiece sealing latex tube, the radial hole is sealed by the second sealing ring on the second tensioning sleeve; when the adjusting screw tensions the cigarette holder sealing latex tube, the radial hole is communicated with the controllable gap.
Based on the above, two third seal rings sleeved on the outer surface of the outer seal cylinder are arranged on the cylinder cover seal matching surface.
Based on the above, the suction airflow joint is sleeved with two fourth sealing rings, so that the suction airflow joint is in sealing fit with the contact surface of the filter cover.
Therefore, the utility model provides an above-mentioned inhale and hinder electron cigarette clamping device for measurement includes internal fixation frame subassembly, external sealing cylinder, aerosol filter plate and the filter mantle of coaxial setting in proper order from left to right in the internal fixation frame subassembly, the sealed latex tube of cigarette holder with the internal fixation frame can form the negative pressure chamber, will the sealed latex tube of cigarette holder adsorb in the internal fixation frame, insert the electron cigarette in the sealed latex tube of cigarette holder, close the negative pressure after the sealed latex tube of cigarette holder will the reconversion, will wrap up the electron cigarette holder of various shapes strictly, leak gas when preventing the suction of electron cigarette to realize the electron cigarette of the different cigarette holder shapes of a clamping device centre gripping, thereby be favorable to the inhale and hinder the measurement of the electron cigarette of different specification models.
Drawings
Fig. 1 is a front view of an electronic cigarette clamping device for measuring smoking resistance provided by an embodiment of the present invention.
Figure 2 is a left side view of the electronic cigarette holding device for resistance to draw measurement shown in figure 1.
Fig. 3 is a sectional view taken along line B-B shown in fig. 2.
Fig. 4 is an enlarged view of the inner mounting bracket assembly shown in fig. 3 with the mouthpiece seal latex tube in a relaxed state.
Figure 5 is an enlarged view of the internal retaining bracket assembly shown in figure 3 with the mouthpiece sealing latex tube in a tensioned state.
Fig. 6 is a schematic view of the assembly of the outer canister, aerosol filter and filter cap of fig. 3.
Fig. 7 is a schematic view of a clamping process of the electronic cigarette clamping device for measuring smoking resistance provided by the embodiment of the present invention.
Wherein reference symbols in the various figures represent: 10. an inner mounting bracket assembly; 11. the latex tube is sealed by the cigarette holder; 12. a guide sleeve; 122. a circumferential groove; 124. a radial bore; 126. a first seal ring; 13. a first tensioning sleeve; 132. a controllable gap; 134. a second seal ring; 14. a second tensioning sleeve; 142. circumferential clearance; 15. a first platen; 16. a second platen; 17. a compression screw; 18. an adjusting screw; 20. an outer sealing cylinder; 21. the inner fixing frame component mounting cavity; 22. a negative pressure joint; 23. a suction resistance test chamber; 24. a suction resistance test joint; 25. a third seal ring; 30. an aerosol filter; 40. a filter housing; 42. a suction airstream connector; 44. a fourth seal ring; 50. an electronic cigarette.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
Referring to fig. 1 to 3, an embodiment of the present invention provides an electronic cigarette clamping device for measuring resistance, including an inner fixing frame assembly 10, an outer sealing cylinder 20, an aerosol filter 30 and a filter cover 40 coaxially disposed in sequence from left to right.
Referring to fig. 4 and 5, the internal fixing frame assembly 10 includes a mouthpiece sealing latex tube 11 and an internal fixing frame coaxially disposed with the mouthpiece sealing latex tube, and the mouthpiece sealing latex tube 11 and the internal fixing frame may form a negative pressure cavity to adsorb the mouthpiece sealing latex tube 11 in the internal fixing frame. The cigarette holder sealing latex tube 11 can be directly contacted with the electronic cigarette holder and is used for wrapping the cigarette holder. The cigarette holder seals two ends openings of the latex tube 11, and is respectively a small hole end and a large hole end, the small hole end is sleeved at the right end of the inner fixing frame, and the large hole end is sleeved at the left end of the inner fixing frame. The internal fixing frame comprises a guide sleeve 12, a first tensioning sleeve 13, a second tensioning sleeve 14, a first pressing plate 15 and a second pressing plate 16.
The guide sleeve 12 is a base shell of the internal fixing frame and is used for supporting the first tensioning sleeve 13 and the second tensioning sleeve 14 and providing a cavity for a negative pressure environment. The guide sleeve 12 is provided with a coaxial circumferential groove 122, the bottom of the circumferential groove 122 is provided with two symmetrical radial holes 124, the guide sleeve 12 is sleeved with two first sealing rings 126, the two first sealing rings 126 are symmetrically sleeved on two sides of the circumferential groove 122, so that the guide sleeve 12 and the wall of the outer sealing cylinder 20 form an inner and outer sealing matching surface to provide a sealing environment.
The first tensioning sleeve 13 and the second tensioning sleeve 14 are spliced to form an inner fixed cavity positioned inside and a coaxial annular variable groove positioned outside. The cigarette holder sealing latex tube 11 is fixed in the inner fixing cavity and can form the negative pressure cavity together with the first tensioning sleeve 13 and the second tensioning sleeve 14. The splicing position of the first tensioning sleeve 13 and the second tensioning sleeve 14 forms a controllable gap 132 communicated with the negative pressure cavity. The guide sleeve 12 is installed in the annular variable groove, a coaxial annular gap 142 is formed between the guide sleeve 12 and the second tensioning sleeve 14, and the size of the controllable gap 132 is controlled by controlling the size of the annular gap 142. The first tensioning sleeve 13 and the second tensioning sleeve 14 are respectively provided with two second sealing rings 134 at the circumferential variable groove position with the controllable gap 132 as a symmetric center, so that the inner wall of the guide sleeve 12 and the circumferential variable groove form a sleeve groove sealing matching surface, and when the controllable gap 132 is increased for the outward movement of the first tensioning sleeve 13 and the second tensioning sleeve 14 relative to the guide sleeve 12, the negative pressure cavity is sealed. In addition, when the mouthpiece sealing latex tube 11 is in a relaxed state and is not tightened, in this embodiment, the radial hole 124 is sealed by the second sealing ring 134 on the second tightening sleeve 14.
The first pressing plate 15 is fixed on the right side of the first tensioning sleeve 13 through four compression screws 17, and meanwhile, the small hole end of the cigarette holder sealing latex tube 11 is compressed and compacted through the first pressing plate 15, the compression screws 17 and the first tensioning sleeve 13. The second pressing plate 16 is fixed on the left side of the second tensioning sleeve 14 through two pressing screws 17 and two adjusting screws 18, and meanwhile, the large hole end of the cigarette holder sealing latex tube 11 is pressed and compacted through the second pressing plate 16 and the pressing screws 17, the adjusting screws 18 and the second tensioning sleeve 14. The adjusting screw 18 is mainly used for tensioning the mouthpiece sealing latex tube 11, the adjusting screw 18 is screwed clockwise, the second tensioning sleeve 14 moves outwards relative to the guide sleeve 12, so that the distance between the annular gap 142 and the controllable gap 132 is increased, the mouthpiece sealing latex tube 11 is pulled and tensioned, and meanwhile, the controllable gap 132 is communicated with the radial hole 124, and further communicated with the negative pressure cavity.
Referring to fig. 6, the outer sealing cylinder 20 is a hollow structure, and the inside of the outer sealing cylinder 20 is composed of an inner fixing frame assembly installation cavity 21 located on the left side and a suction resistance testing cavity 23 located on the right side. The shape of the inner fixing frame assembly installation cavity 21 is matched with the overall outline of the inner fixing frame assembly 10, and the inner fixing frame assembly 10 is installed in the inner fixing frame assembly installation cavity 21 to form the inner and outer sealing matching surfaces so as to provide a sealing environment. In this embodiment, the internal fixing frame assembly 10 is installed in the internal fixing frame assembly installation cavity 21 in a threaded manner. The inner fixing frame assembly installation cavity 21 is cylindrical, the cavity wall of the inner fixing frame assembly installation cavity is sealed with the guide sleeve 12 through a first sealing ring 126, a negative pressure joint 22 communicated with the negative pressure cavity is further arranged on the cavity wall of the inner fixing frame assembly installation cavity, and the negative pressure joint 22 is fixed on the outer sealing cylinder 20 in a threaded mode and is communicated with the negative pressure cavity through the annular groove 122. In other embodiments, the internal fixing frame assembly 10 is installed in the internal fixing frame assembly installation cavity 21 in a plugging manner; the negative pressure joint 22 is fixed on the outer sealing cylinder 20 in a plugging manner.
The suction resistance testing cavity 23 is formed by sequentially connecting a reducing cavity, a suction resistance connector mounting cavity and an expanding cavity from left to right, and the diameter of the reducing cavity is gradually reduced to the diameter of the suction resistance connector mounting cavity so as to facilitate mounting of a suction resistance testing connector 24; the diameter of the diameter expansion cavity is gradually increased from the diameter of the suction resistance joint installation cavity so as to facilitate the subsequent installation of the aerosol filter sheet 30. In this embodiment, the diameter of the left bottom surface of the reducing cavity is larger than the diameter of the small hole end of the mouthpiece sealing latex tube 11. And a suction resistance test connector 24 communicated with the suction resistance joint installation cavity is arranged on the wall of the suction resistance joint installation cavity, and the suction resistance test connector 24 is fixed on the outer sealing cylinder 20 in a threaded manner. In other embodiments, the suction resistance test connector 24 is fixed to the outer seal cylinder 20 by plugging.
The aerosol filter sheet 30 covers the right bottom surface of the diameter expanding cavity and is fixed on the right side of the outer sealing cylinder 20 in a threaded manner through the filter cover 40. And two third sealing rings 25 are sleeved at the right end of the outer sealing cylinder 20, so that the inner edge of the filter cover 40 and the outer surface of the outer sealing cylinder 20 form a cylinder cover sealing matching surface. In other embodiments, the filter cap 40 is fixed to the outer sealing cylinder 20 by plugging.
The filter housing 40 is threaded at its center with a suction air fitting 42, the suction air fitting 42 communicating with the suction resistance test chamber 23. Two fourth sealing rings 44 are sleeved on the suction air flow joint 42, so that the suction air flow joint 42 is in sealing fit with the contact surface of the filter cover 40. In other embodiments, the filter sock 40 and the suction airflow connection 42 are connected by a plug-in connection.
Referring to fig. 7, the process of clamping the electronic cigarette by the electronic cigarette clamping device for measuring the smoking resistance provided by the embodiment is as follows:
after the electronic cigarette clamping device for measuring the suction resistance is assembled, the adjusting screw 18 is screwed clockwise, and the cigarette holder sealing latex tube 11 is tightened to enable the controllable gap 132 to be communicated with the radial hole 124; then, the negative pressure is communicated through the negative pressure connector 22, so that the cigarette holder sealing latex tube 11, the guide sleeve 12, the first sealing ring 126, the second sealing ring 134 and the outer sealing cylinder 20 jointly form a negative pressure cavity to provide a negative pressure environment, and the cigarette holder sealing latex tube 11 is tightly attached to the inner walls of the inner first tensioning sleeve 13 and the inner second tensioning sleeve 14 under the action of the negative pressure; at this moment, insert electronic cigarette 50 in the sealed emulsion pipe of cigarette holder 11, then close the negative pressure, the sealed emulsion pipe of cigarette holder 11 resumes from the tight state that rises gradually, simultaneously radial hole 124 gradually with controllable clearance 132 dislocation is sealed by second sealing washer 134, and the sealed emulsion pipe of cigarette holder 11 returns the original position this moment, is in the state of relaxing and is wrapped up electronic cigarette 50, and gas leakage when preventing the suction of electronic cigarette to the realization uses the electronic cigarette of a clamping device centre gripping different specification models, thereby is favorable to the resistance to smoking of the electronic cigarette of different specification models to be measured.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (10)
1. The utility model provides a inhale and hinder measuring and use electron cigarette clamping device which characterized in that: comprises an inner fixed frame component, an outer sealing cylinder, an aerosol filter plate and a filter cover which are coaxially arranged from left to right in sequence;
the internal fixing frame component comprises a cigarette holder sealing latex tube and an internal fixing frame coaxially arranged with the cigarette holder sealing latex tube, and the cigarette holder sealing latex tube and the internal fixing frame can form a negative pressure cavity to adsorb the cigarette holder sealing latex tube in the internal fixing frame;
the outer sealing cylinder is of a hollow structure and consists of an inner fixing frame assembly mounting cavity positioned on the left side and a suction resistance testing cavity positioned on the right side, inner and outer sealing matching surfaces are formed on the wall of the inner fixing frame assembly mounting cavity and the outer surface of the inner fixing frame, a negative pressure joint communicated with the negative pressure cavity is arranged on the wall of the inner fixing frame assembly mounting cavity, and a suction resistance testing joint communicated with the suction resistance testing cavity is arranged on the wall of the suction resistance testing cavity;
the aerosol filter plate is fixed on the right side of the outer sealing cylinder through the filter cover, the inner edge of the filter cover and the outer surface of the outer sealing cylinder form a cylinder cover sealing matching surface, and the center of the filter cover is hermetically provided with a suction airflow joint communicated with the suction resistance testing cavity.
2. The electronic cigarette clamping device for measuring smoking resistance according to claim 1, wherein: the inner fixing frame comprises a guide sleeve, a first tensioning sleeve, a second tensioning sleeve, a first pressing plate and a second pressing plate, wherein a coaxial circumferential groove is formed in the guide sleeve and is communicated with the negative pressure connector, two symmetrical radial holes are formed in the bottom of the circumferential groove, and the guide sleeve and the wall of a mounting cavity of the inner fixing frame assembly form the inner and outer sealing matching surface;
the cigarette holder sealing latex tube is arranged in the inner fixed cavity and can form the negative pressure cavity together with the first tensioning sleeve and the second tensioning sleeve, a controllable gap communicated with the negative pressure cavity is formed at the splicing position of the first tensioning sleeve and the second tensioning sleeve, the guide sleeve is arranged in the annular variable groove, the guide sleeve and the second tensioning sleeve form a coaxial annular gap, and a sleeve groove sealing matching surface is formed by the inner wall of the guide sleeve and the annular variable groove;
the first pressing plate is fixed on the right side of the first tensioning sleeve through a compression screw, and the right end of the cigarette holder sealing latex tube is compressed through the first pressing plate, the compression screw and the first tensioning sleeve;
the second pressing plate is fixed on the left side of the second tensioning sleeve through a compression screw and an adjusting screw, the left end of the cigarette holder sealing latex tube is compressed through the second pressing plate and the compression screw thereof, the adjusting screw and the second tensioning sleeve, and the adjusting screw can control the interval of the annular gap to enable the controllable gap to be communicated with the radial hole.
3. The electronic cigarette clamping device for measuring smoking resistance according to claim 2, wherein: the suction resistance testing cavity is formed by sequentially connecting a reducing cavity, a suction resistance joint mounting cavity and an expanding cavity from left to right, the diameter of the reducing cavity is gradually reduced to the diameter of the suction resistance joint mounting cavity, the diameter of the expanding cavity is gradually increased from the diameter of the suction resistance joint mounting cavity, and the suction resistance testing joint communicated with the suction resistance joint mounting cavity is arranged on the wall of the suction resistance joint mounting cavity.
4. The electronic cigarette clamping device for measuring smoking resistance according to claim 3, wherein: the inner fixing frame assembly, the outer sealing barrel, the negative pressure connector, the suction resistance testing connector, the filter cover and the suction airflow connector are installed in a threaded or plugging mode.
5. The electronic cigarette clamping device for measuring smoking resistance according to claim 4, wherein: and the inner and outer sealing matching surfaces, the cylinder cover sealing matching surface and the sleeve groove sealing matching surface are respectively provided with a sealing ring.
6. The electronic cigarette clamping device for measuring smoking resistance according to claim 5, wherein: two first sealing rings are formed on the inner and outer sealing matching surfaces and sleeved on the guide sleeve, and the first sealing rings are symmetrically sleeved on two sides of the annular groove.
7. The electronic cigarette clamping device for measuring smoking resistance according to claim 5, wherein: four second sealing rings are formed on the sealing matching surface of the sleeve groove, and the second sealing rings are respectively sleeved on the first tensioning sleeve and the second tensioning sleeve by taking the controllable gap as a symmetrical center.
8. The electronic cigarette clamping device for measuring smoking resistance according to claim 7, wherein: when the adjusting screw enables the cigarette holder sealing latex tube to be in a relaxed state, the radial hole is sealed by a second sealing ring on the second tensioning sleeve; when the adjusting screw tensions the cigarette holder sealing latex tube, the radial hole is communicated with the controllable gap.
9. The electronic cigarette clamping device for measuring smoking resistance according to claim 5, wherein: and two third sealing rings sleeved on the outer surface of the outer sealing cylinder are arranged on the sealing matching surface of the cylinder cover.
10. The electronic cigarette clamping device for measuring smoking resistance according to claim 5, wherein: and two fourth sealing rings are sleeved on the suction airflow joint, so that the suction airflow joint is in sealing fit with the contact surface of the filter cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221615228.8U CN217609570U (en) | 2022-06-27 | 2022-06-27 | Electronic cigarette clamping device for measuring suction resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221615228.8U CN217609570U (en) | 2022-06-27 | 2022-06-27 | Electronic cigarette clamping device for measuring suction resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217609570U true CN217609570U (en) | 2022-10-21 |
Family
ID=83629719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221615228.8U Active CN217609570U (en) | 2022-06-27 | 2022-06-27 | Electronic cigarette clamping device for measuring suction resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217609570U (en) |
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2022
- 2022-06-27 CN CN202221615228.8U patent/CN217609570U/en active Active
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