CN114618679A - Telescopic magnetic rod with movable magnet - Google Patents
Telescopic magnetic rod with movable magnet Download PDFInfo
- Publication number
- CN114618679A CN114618679A CN202210257480.4A CN202210257480A CN114618679A CN 114618679 A CN114618679 A CN 114618679A CN 202210257480 A CN202210257480 A CN 202210257480A CN 114618679 A CN114618679 A CN 114618679A
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- magnetic rod
- air
- elastic
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- 238000007789 sealing Methods 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 7
- 230000001846 repelling effect Effects 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 229910052742 iron Inorganic materials 0.000 abstract description 9
- 230000005389 magnetism Effects 0.000 abstract description 8
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011027 product recovery Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
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Abstract
The invention relates to the technical field of magnetism, and discloses a telescopic magnetic rod with a movable magnet, which comprises an outer shell and a piston piece, wherein the outer shell comprises a fixed section and a movable section, one end of the fixed section, which is opposite to the movable section, is respectively provided with a first air delivery hole and a second air delivery hole, the piston piece comprises two connecting seats, a plurality of permanent magnets and magnetic conduction plates which are arranged in each connecting seat at intervals, an elastic air bag layer which is fixedly arranged between the connecting seats, and an elastic layer which is fixedly arranged at the outer ring wall of the end part of each connecting seat, and under the action of the elastic air bag layer and the elastic layer, the piston piece is always in air-tight movable fit with a first piston cavity or a second piston cavity in the moving process, the telescopic magnetic rod can flexibly adjust the length, and a sealing piece is always in air-tight movable fit with the interior of the magnetic rod, has good magnetism, simple structure and wide applicability, and is suitable for mass production, after being matched with the iron removal device, the production cost is effectively reduced and the continuous operation can be realized.
Description
Technical Field
The invention relates to the technical field of magnetism, in particular to a telescopic magnetic rod with a movable magnet.
Background
The magnetic rod is mainly used for filtering iron-containing impurities and other magnetic substances in various fine powder, liquid and semi-liquid, and is widely applied to the fields of chemical industry, food, waste product recovery, carbon black and the like. The magnetic rod consists of an internal magnetic core and an external cladding, and the magnetic core also comprises a magnet block and a magnetic conductive iron sheet.
Most of the existing iron removers move mesons formed by permanent magnets into a working cavity by using a power device, and after iron is removed for a period of time, the mesons are moved to a cleaning area by using the power device for cleaning.
Chinese patent No. CN103657846B discloses a movable magnetic bar with magnets and an iron removing device using the same, wherein the magnetic bar disclosed in the patent comprises a housing member and a piston member; a magnetic rod piston cavity is arranged in the shell piece; the magnetic rod piston cavity is a columnar space, one end of the magnetic rod piston cavity is communicated with the first air inlet channel, and the other end of the magnetic rod piston cavity is communicated with the second air inlet channel; the piston part consists of a plurality of permanent magnets, a plurality of magnetic conduction plates and a connecting piece for connecting the permanent magnets and the magnetic conduction plates together; two adjacent permanent magnets are arranged in a mode that like poles repel each other, and a magnetic conduction plate is arranged between the two adjacent permanent magnets; the piston piece is positioned in the magnetic rod piston cavity and is in air-tight fit with the magnetic rod piston cavity, and the piston piece makes linear reciprocating motion in the magnetic rod piston cavity.
Foretell bar magnet is through aerifing in first air inlet channel and second air inlet channel respectively, order to order about the piston spare that is located bar magnet piston intracavity and make a round trip to move under keeping with bar magnet piston chamber gas tightness complex prerequisite, thereby carry the outside iron-containing material removal of shell spare, however, the length of foretell bar magnet is unanimous, to the deironing device of different width, need set up the shell spare of different length, this just leads to, the bar magnet need customize in process of production, unable mass production, this kind of bar magnet rate of application and application scope's reduction just leads to, this kind of telescopic bar magnet just needs to be set up, and the bar magnet possesses the elasticity and just leads to the internal diameter of its shrink section to be less than the internal diameter of fixed segment, can't keep the gas tightness between the piston and the bar magnet piston chamber.
Disclosure of Invention
Aiming at the defect that the application range of the magnetic rod is low due to the fact that the magnetic rod which is provided with a movable magnet and a telescopic shell piece is lacked in the prior art, the invention provides the telescopic magnetic rod with the movable magnet, the application range of the magnetic rod is improved while the production cost is reduced, and the large-scale production can be carried out.
In order to solve the technical problem, the invention is solved by the following technical scheme:
a flexible magnetic rod with movable magnets comprises a shell and a piston piece, wherein the shell comprises a fixed section and a movable section, the fixed section is internally provided with a first piston cavity, the movable section is in air-tight flexible fit with the first piston cavity and internally provided with a second piston cavity, one end of the fixed section, which is far away from the movable section, is provided with a first air delivery hole, one end of the movable section, which is far away from the fixed section, is provided with a second air delivery hole, the piston piece comprises two connecting seats, the upper connecting seat and the lower connecting seat are distributed at intervals, the openings of the two connecting seats are opposite, a plurality of permanent magnets and magnetic conductive plates are distributed in each connecting seat at intervals, an elastic air bag layer is fixedly arranged between the connecting seats, and an elastic layer is fixedly arranged at the outer ring wall of the end part of each connecting seat, two adjacent permanent magnets are distributed in a mode of repelling each other, vertical tangent planes are arranged at two sides of each connecting seat, two sides of the elastic air bag layer are fixedly wrapped outside the tangent planes to form an arc-shaped elastic cavity with an outward protrusion, under the effect of elasticity gasbag layer and elastic layer, piston spare removes the in-process all the time and moves the cooperation with first piston chamber or second piston chamber gas tightness, and the connecting seat is close to the one end tip in second piston chamber and is provided with the first inclined plane that is convenient for piston spare to block into the second piston chamber from first piston chamber.
By adopting the scheme, the connecting seats are arranged for supporting and fixing the permanent magnet and the magnetic conduction plate, the elastic air bag layer positioned between the connecting seats has the deformation function of enabling the piston body and the first piston cavity to be close to or far away from each other while ensuring the air tightness between the piston body and the first piston cavity, and the arc-shaped elastic cavities arranged at the two sides of the connecting seats have the deformation function of compressing or expanding the two sides of the connecting seats, so that the piston piece can be in air-tight fit with the first piston cavity or the second piston cavity all the time in the moving process, and the fact that the air input into the first air input hole or the second air input hole can drive the piston piece to move along the axial direction of the outer shell body is ensured; the second piston cavity is smaller than the first piston cavity, after the first inclined plane arranged at one end of the connecting seat close to the second piston cavity is matched with the end part of the second piston cavity, the connecting seat is driven to be close to each other by the compression force of the air pressure input into the first piston cavity in the first air transmission hole, the arc elastic cavities at two sides are compressed along with the connecting seat so that the whole piston piece enters the second piston cavity and keeps airtight fit with the second piston cavity, the deformable piston piece is suitable for a telescopic outer shell with variable diameter while being suitable for a common outer shell with fixed diameter, after the length of the outer shell is changed at will, the piston piece can be suitable for and keep good magnetism, the movable telescopic magnetic rod of the magnet can flexibly adjust the length of the magnetic rod, and the sealing piece is always in movable fit with the inside airtightness of the magnetic rod, the magnetic rod has good magnetism, a simple structure and wide applicability, is suitable for mass production, effectively reduces the production cost and can continuously operate after being matched with an iron removal device.
Preferably, a reset mechanism which is matched with the first piston cavity in an air-tight mode when the piston piece moves to the first piston cavity from the second piston cavity is arranged in the elastic air bag layer, and the reset mechanism comprises a reset spring which is fixedly arranged between the upper connecting seat and the lower connecting seat in the elastic air bag layer.
By adopting the scheme, the resetting capability of the elastic air bag layer is improved by the resetting mechanism, the elastic air bag layer can be reset when the elastic air bag layer has air leakage or abrasion, and the sealing piece is ensured to be in airtight fit with the first piston cavity or the second piston cavity, so that the service life of the whole sealing piece is prolonged.
Preferably, two fixing plates fixedly arranged with the upper end and the lower end of the elastic air bag layer respectively are inserted into the elastic air bag layer, a plurality of return springs are arranged at intervals along the moving direction of the piston piece, and the upper end and the lower end of each return spring are fixedly arranged with the fixing plates at the upper end and the lower end respectively.
By adopting the scheme, the fixing plate is convenient for the installation and fixation of the reset spring, and the deformation resistance between the end parts of the elastic air bag layer is increased.
Preferably, the movable section comprises a movable section and a limiting ring, the movable section can extend out of the fixed section, the limiting ring is limited in the fixed section, the fixed section comprises an opening for inserting the whole movable section, a sealing cover fixed at the opening and a through opening for inserting the movable section, and a first sealing ring for interference insertion of the movable section is arranged at the through opening.
By adopting the scheme, the limiting moving section is arranged through the through opening and falls off from the fixed section, the opening is arranged so that the moving section can be conveniently installed on the fixed section, and the air tightness is always kept in the process that the moving section moves relative to the fixed section through the arrangement of the sealing ring.
Preferably, an internal thread is arranged at the opening, an external thread matched with the internal thread is arranged on the sealing cover, and the first air delivery hole is formed in the sealing cover.
By adopting the scheme, the sealing cover is matched with the opening in a threaded manner, so that the sealing cover is convenient to mount or dismount.
Preferably, the seal cover is provided with an easy-opening mechanism which is convenient for the seal cover to open, and the easy-opening mechanism comprises inserting rings which are symmetrically arranged at the two sides of the first air transmission hole at the end part of the seal cover and are used for inserting the inserted pin.
By adopting the scheme, the sealing cover is convenient to take down or install after the arrangement of the insert ring is matched with the bolt.
Due to the adoption of the technical scheme, the invention has the following remarkable technical effects: the connecting seats are arranged for supporting and fixing the permanent magnet and the magnetic conduction plate, the elastic air bag layer between the connecting seats has a deformation function of approaching to or separating from each other between the connecting seats while ensuring that the piston body and the first piston cavity keep air tightness, and the arc-shaped elastic cavities arranged at two sides of the connecting seats have a deformation function of compressing or expanding two sides of the connecting seats, so that the piston piece can be always in air-tight fit with the first piston cavity or the second piston cavity in the moving process, and the piston piece can be driven to move along the axial direction of the outer shell by air transmission into the first air transmission hole or the second air transmission hole; the second piston cavity is smaller than the first piston cavity, after a first inclined plane arranged at one end of the connecting seat close to the second piston cavity is matched with the end part of the second piston cavity, the connecting seat is driven to be close to each other by the compression force of air pressure input into the first piston cavity in the first air transmission hole, the arc-shaped elastic cavities at two sides are compressed along with the connecting seat, so that the whole piston piece enters the second piston cavity and keeps airtight fit with the second piston cavity, the deformable piston piece is suitable for a common outer shell with a fixed diameter and a telescopic outer shell with variable diameters, and after the length of the outer shell is changed at will, the piston piece can be suitable for and keeps good magnetism; reset mechanism's setting has improved the reset capability on elasticity gasbag layer, there is gas leakage or the situation of wearing and tearing when elasticity gasbag layer, also can ensure that it can reset, ensure that sealing member and first piston chamber or second piston chamber keep the gas tightness cooperation, thereby prolong the life of whole sealing member, the mobilizable flexible bar magnet of this magnet can adjust bar magnet length in a flexible way, and the sealing member removes the cooperation with the inside gas tightness of bar magnet all the time, possess good magnetism, simple structure and extensive suitability, be fit for mass production, after cooperating with deironing device, effective reduction in production cost just can continuous operation.
Drawings
FIG. 1 is a left side view of a magnet movable telescopic bar magnet of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is an enlarged view of A in FIG. 2;
FIG. 5 is an enlarged view of B in FIG. 3;
FIG. 6 is an enlarged view of C in FIG. 2;
FIG. 7 is an enlarged view of D in FIG. 2;
FIG. 8 is a disassembled view of the seal member of the present invention;
fig. 9 is an isometric view of a magnet movable telescopic bar magnet of the present invention.
The names of the parts designated by the numerical references in the above figures are as follows: 1. a fixed section; 101. a first piston chamber; 2. a moving section; 201. a second piston chamber; 202. a second gas transmission hole; 203. an active segment; 204. a limiting ring; 3. a sealing cover; 301. a first gas transmission hole; 4. inserting a ring; 5. a connecting seat; 501. a first inclined plane; 502. an elastic layer; 6. a permanent magnet; 7. a magnetic conductive plate; 8. an elastic air bag layer; 801. an arc-shaped elastic cavity; 802. a second inclined surface; 9. a fixing plate; 10. a return spring; 11. a first seal ring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Examples
The utility model provides a mobilizable flexible bar magnet of magnet, includes shell body and piston spare, and the shell body includes that inside possesses the fixed section 1 of first piston chamber 101 and can be relative first piston chamber 101 gas tightness telescopic cooperation and inside possess the removal section 2 of second piston chamber 201.
Wherein, remove section 2 including the activity section 203 of protractile fixed segment 1 and spacing in the spacing ring 204 of fixed segment 1, fixed segment 1 is including supplying whole removal section 2 male opening, be fixed in the sealed lid 3 of opening part and supply the mouth of crossing that activity section 203 alternates to set up, it supplies to remove section 2 interference male first sealing washer 11 to be provided with in mouth department, be provided with the internal thread at the opening part, sealed lid 3 is provided with the external screw thread with interior screw-thread fit, be provided with the second sealing washer that keeps sealed lid 3 gas tightness after external screw thread and interior screw-thread fit on sealed lid 3, be provided with first gas transmission hole 301 on sealed lid 3, the one end of keeping away from fixed segment 1 at removal section 2 is provided with second gas transmission hole 202.
The piston piece comprises two connecting seats 5 which are distributed at intervals from top to bottom and have back-to-back openings, a plurality of permanent magnets 6 and magnetic conductive plates 7 which are arranged in each connecting seat 5 at intervals, an elastic air bag layer 8 which is fixedly arranged between the connecting seats 5, and an elastic layer 502 which is fixedly arranged at the outer ring wall of the end part of each connecting seat 5, wherein the two adjacent permanent magnets 6 are arranged in a mode of repelling with each other at the same level, vertical tangent planes are arranged at the two sides of each connecting seat 5, two sides of each elastic air bag layer 8 are fixedly wrapped outside the tangent planes to form an outward-protruding arc-shaped elastic cavity 801, under the action of the elastic air bag layer 8 and the elastic layer 502, the piston piece is always in air-tight movable fit with the first piston cavity 101 or the second piston cavity 201 in the moving process, a first inclined plane 501 which is convenient for the piston piece to be clamped into the second piston cavity 201 from the first piston cavity 101 is arranged at the end part of each connecting seat 5 close to the second piston cavity 201, a second inclined plane 802 is arranged at one end of the arc-shaped elastic cavity 801 close to the second air delivery hole 202, so that the arc-shaped elastic cavity 801 can be clamped into the second piston cavity 201 after being compressed, when air is delivered to the first air delivery hole 301 and the piston piece moves from the first piston cavity 101 to the second piston cavity 201, the two connecting seats 5 are close to each other, at the moment, the elastic air bag layer 8 is in a compressed state, and the piston piece and the second piston cavity 201 are in air-tight movable fit; when the second air delivery hole 202 is supplied with air and the piston member moves from the second piston chamber 201 to the first piston chamber 101, the elastic air bag layer 8 is restored and expanded, and the piston member is in air-tight movable fit with the first piston chamber 101.
In the above arrangement, the connecting seats 5 are used for supporting and fixing the permanent magnet 6 and the magnetic conductive plate 7, while the elastic air bag layer 8 located between the connecting seats 5 provides a deformation function of approaching or separating from each other through the connecting seats 5 while ensuring that the piston body and the first piston cavity 101 maintain air tightness, and the arc-shaped elastic cavities 801 arranged at both sides of the connecting seats 5 provide a deformation function of compressing or expanding at both sides of the connecting seats 5, so that the piston piece can be always in air-tight fit with the first piston cavity 101 or the second piston cavity 201 in the moving process, and the air input into the first air transmission hole 301 or the second air transmission hole 202 can drive the piston piece to move along the axial direction of the outer shell; the second piston chamber 201 is smaller than the first piston chamber 101, after the first inclined plane 501 arranged at one end of the connecting seat 5 close to the second piston chamber 201 is matched with the end part of the second piston chamber 201, the connecting seat 5 is driven to be close to each other by the compression force of the air pressure input into the first piston chamber 101 in the first air delivery hole 301, and the arc-shaped elastic chambers 801 at two sides are compressed along with the compression force, so that the whole piston piece enters the second piston chamber 201 and keeps air-tight fit with the second piston chamber 201.
In order to improve the service life of the sealing element, be provided with in elastic air bag layer 8 when the piston spare from second piston chamber 201 removes to first piston chamber 101 with first piston chamber 101 gas tightness complex canceling release mechanical system, canceling release mechanical system includes in elastic air bag layer 8 inside in the fixed reset spring 10 that sets up between upper and lower connecting seat 5, preferably, insert two fixed plates 9 that set up with elastic air bag layer 8's upper and lower end respectively in elastic air bag layer 8 is inside, reset spring 10 is provided with a plurality of along piston spare moving direction interval, every reset spring 10's upper and lower end respectively with the fixed plate 9 fixed setting of upper and lower extreme. The resetting capability of the elastic air bag layer 8 is improved due to the arrangement of the resetting mechanism, when the elastic air bag layer 8 has air leakage or abrasion, the resetting can be ensured, the sealing piece is ensured to be in airtight fit with the first piston cavity 101 or the second piston cavity 201, and the service life of the whole sealing piece is prolonged.
Be provided with the favourable opening mechanism that sealed lid 3 opened of being convenient for on sealed lid 3, favourable opening mechanism includes that the confession bolt male that the tip of sealed lid 3 set up in the bilateral symmetry of first gas transmission hole 301 inserts ring 4, after inserting ring 4 and bolt cooperation, can install fast or take off sealed lid 3 through operating personnel rotation bolt.
The length of the magnetic rod can be flexibly adjusted through the movable telescopic magnetic rod of the magnet in the scheme, the sealing element is always in movable fit with the air tightness inside the magnetic rod, good magnetism, a simple structure and wide applicability are achieved, mass production is suitable, and after the sealing element is matched with an iron removal device, production cost is effectively reduced, and continuous operation can be achieved to improve production efficiency.
Claims (6)
1. A flexible bar magnet with movable magnets comprises an outer shell and a piston piece, and is characterized in that: the outer shell comprises a fixed section (1) internally provided with a first piston cavity (101) and a moving section (2) which is in air-tight telescopic fit with the first piston cavity (101) and internally provided with a second piston cavity (201), one end of the fixed section (1) far away from the moving section (2) is provided with a first air delivery hole (301), one end of the moving section (2) far away from the fixed section (1) is provided with a second air delivery hole (202), the piston piece comprises two connecting seats (5) which are distributed at intervals from top to bottom and have opposite openings, a plurality of permanent magnets (6) and magnetic conduction plates (7) which are distributed at intervals in each connecting seat (5), an elastic air bag layer (8) fixedly arranged between the connecting seats (5) and an elastic layer (502) fixedly arranged at the outer ring wall of the end part of the connecting seat (5), two adjacent permanent magnets (6) are distributed in a mode of repelling the same grade, two sides of the connecting seats (5) are provided with vertical tangent planes, the fixed parcel in tangent plane outside of both sides of elasticity gasbag layer (8) is formed with convex arc elasticity chamber (801), under the effect of elasticity gasbag layer (8) and elastic layer (502), the piston spare removes the cooperation with first piston chamber (101) or second piston chamber (201) gas tightness all the time at the removal in-process, the one end tip that connecting seat (5) are close to second piston chamber (201) is provided with the first inclined plane (501) that the piston spare is gone into second piston chamber (201) from first piston chamber (101) card of being convenient for.
2. A magnet-movable telescopic magnetic rod according to claim 1, wherein: be provided with in elasticity gasbag layer (8) when the piston spare from second piston chamber (201) remove to first piston chamber (101) with first piston chamber (101) gas tightness complex canceling release mechanical system, canceling release mechanical system includes in elasticity gasbag layer (8) inside reset spring (10) of fixed setting between upper and lower connecting seat (5).
3. A magnet movable telescopic magnetic rod according to claim 2, wherein: two fixing plates (9) which are respectively fixed with the upper end and the lower end of the elastic air bag layer (8) are inserted into the elastic air bag layer (8), a plurality of reset springs (10) are arranged at intervals along the moving direction of the piston piece, and the upper end and the lower end of each reset spring (10) are respectively fixed with the fixing plates (9) at the upper end and the lower end.
4. A magnet movable telescopic magnetic rod according to claim 1, wherein: remove section (2) including activity section (203) and spacing ring (204) in canned paragraph (1) of protractile canned paragraph (1), canned paragraph (1) is including supplying whole removal section (2) male opening, being fixed in sealed lid (3) of opening part and supplying the mouth of crossing that activity section (203) interlude set up, is provided with at mouth of crossing and supplies to remove section (2) interference male first sealing washer (11).
5. A magnet movable telescopic magnetic rod according to claim 4, wherein: an internal thread is arranged at the opening, an external thread matched with the internal thread is arranged on the sealing cover (3), and the first air delivery hole (301) is arranged on the sealing cover (3).
6. A magnet movable telescopic magnetic rod according to claim 5, wherein: the sealing cover (3) is provided with an easy-opening mechanism which is convenient for the sealing cover (3) to open, and the easy-opening mechanism comprises inserting rings (4) which are symmetrically arranged at the end part of the sealing cover (3) on the two sides of the first air transmission hole (301) and are used for inserting a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210257480.4A CN114618679B (en) | 2022-03-16 | 2022-03-16 | Telescopic magnetic rod with movable magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210257480.4A CN114618679B (en) | 2022-03-16 | 2022-03-16 | Telescopic magnetic rod with movable magnet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114618679A true CN114618679A (en) | 2022-06-14 |
| CN114618679B CN114618679B (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210257480.4A Active CN114618679B (en) | 2022-03-16 | 2022-03-16 | Telescopic magnetic rod with movable magnet |
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