CN207948012U - A kind of magnetic field shielding structure of metal probe - Google Patents
A kind of magnetic field shielding structure of metal probe Download PDFInfo
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- CN207948012U CN207948012U CN201721793760.8U CN201721793760U CN207948012U CN 207948012 U CN207948012 U CN 207948012U CN 201721793760 U CN201721793760 U CN 201721793760U CN 207948012 U CN207948012 U CN 207948012U
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- field shielding
- magnetic field
- coil
- outer casing
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Abstract
The utility model proposes a kind of magnetic field shielding structure of metal probe, the magnetic field shielding structure is the cavity wall or conduit wall that multilayered structure is formed, which includes outer casing, buffer layer, shielded layer and coil layer successively from the outside to the core；The outer casing is with metal or plastic shaping；The buffer layer is molded with elastic material；The shielded layer includes with the body layer of plastic shaping and set on the magnetic field shielding film of body layer side；The coil layer includes transmitting coil, receiving coil and coil backplate；The utility model uses double layer screen, increases anti-interference and resistance to mechanical vibration ability, and outer casing allows to use plastics or metal forming, increases cost flexibility.
Description
Technical field
The utility model is related to be related to material tests field, the magnetic field shielding structure of especially a kind of metal probe.
Background technology
In the production of food and personal articles for use, metal detection tool is often needed to detect the metal that may mix in finished product
Object, but conventional metal detector shell is usually made of 304 stainless steels, and 304 stainless steel usage amounts are big, and materials are easy, but by
In 304 stainless steels be not high magnetic conductive material, it is weak and of high cost to the screening ability of magnetic field especially low frequency magnetic field, how to solve
Certainly this problem is a research direction.
Invention content
The utility model proposes a kind of magnetic field shielding structures of metal probe to add on the basis of original electric field shielding construction
Strong magnetic field shielding ability, while electric field and magnetic interference are shielded, external environment vibrations can be reduced to the coil working in probe
Caused by interfere, outer casing allow with metal or plastic shaping, increase cost flexibility.
The utility model uses following technical scheme.
A kind of magnetic field shielding structure of metal probe, the magnetic field shielding structure are the cavity wall that multilayered structure is formed or lead to
Road wall, the multilayered structure include outer casing, buffer layer, shielded layer and coil layer successively from the outside to the core；The outer casing is with metal
Or plastic shaping；The buffer layer is molded with elastic material；The shielded layer includes with the body layer of plastic shaping and set on master
The magnetic field shielding film of body layer side；The coil layer includes transmitting coil, receiving coil and coil backplate.
The magnetic field shielding film is molded with high magnetic conductive material.
The shielded layer is close to outer casing, and far from coil layer, the magnetic field shielding film is located on the inside of shielded layer.
When the outer casing is with plastic shaping, electric field shielding film is equipped on the inside of it, electric field shielding film is low with resistivity
Material is molded.
It is locked with the screw of dense distribution between the shielded layer and outer casing.
Electric field shielding film, the equal reliable ground of magnetic field shielding film, avoid stored charge or potential at screened film.
The shielded layer position is far from coil layer.
The usefulness of the utility model is as follows.
1, on the basis of original electric field shielding construction, magnetic field shielding ability is strengthened, magnetic field shielding film is made of metal, this
Body also has electric field shielding ability, and in of the invention, the shielded layer is positioned next to outer casing, far from coil layer, can avoid shielded layer
The electromagnetic wave energy that absorbing coil is sent out so that influence of the shielded layer to coil sensitivity is sufficiently small.
2, when the outer casing is with plastic shaping, spraying electric field shielding film is set on the inside of it, effectively reduces cost, is increased
Cost flexibility.
3, this product sets buffer layer between the outer casing and shielded layer of stainless steel, when there are mechanical oscillation in the external world, buffering
Layer can slow down the Oscillation Amplitude of probe metal shell so that the probing shell metal vibration that extraneous vibration causes is not easy to make coil
At interference.
Description of the drawings
With reference to the accompanying drawings and detailed description to the further details of explanation of the utility model：
Attached drawing 1 is the schematic diagram of the utility model；
Attached drawing 2 is the schematic diagram at the utility model shielded layer；
In figure：3- coil backplates；6- outer casings；7- buffer layers；8- shielded layers；9- coil layers；15- electric field shielding films；16-
The body layer of shielded layer（Insulating layer）；17- magnetic field shielding films.
Specific implementation mode
As shown in Figs. 1-2, the magnetic field shielding structure of a kind of metal probe, the magnetic field shielding structure are formed for multilayered structure
Cavity wall or conduit wall, the multilayered structure from the outside to the core successively include outer casing, buffer layer, shielded layer 8 and coil layer 9；Institute
Outer casing 6 is stated with metal or plastic shaping；The buffer layer is molded with elastic material；The shielded layer 8 includes with plastic shaping
Body layer 16 and magnetic field shielding film 17 set on body layer side；The coil layer includes transmitting coil, receiving coil and line
It encircles for protection plate 3.
The magnetic field shielding film is molded with high magnetic conductive material.
The shielded layer is close to outer casing 6, and far from coil layer 9, the magnetic field shielding film 17 is located at 8 inside of shielded layer.
When the outer casing 6 is with plastic shaping, electric field shielding film is equipped on the inside of it, electric field shielding film is low with resistivity
Material is molded.
It is locked with the screw of dense distribution between the shielded layer 8 and outer casing 6.
The shielded layer position is far from coil layer.
In this example, buffer layer 7 is equipped between outer casing 6 and shielded layer 8；Coil backplate 3 is equipped at coil layer；It is described with modeling
Expect that molding body layer is insulating layer 16,
Coil layer is carved with the groove that width is equal to or slightly less than hair line and receiving coil, by line with plastic shaping on plastics
In circle indentation groove, add epoxy resin sealing.
In this example, the buffer layer is molded with rigid foam, and the magnetic field shielding film is molded with nickel alloy conductive paint, described
Electric field shielding film is molded with copper-clad silver conductive paint.
Claims (3)
1. a kind of magnetic field shielding structure of metal probe, it is characterised in that：The magnetic field shielding structure is what multilayered structure was formed
Cavity wall or conduit wall, the multilayered structure include outer casing, buffer layer, shielded layer and coil layer successively from the outside to the core；It is described outer
Backplate is with metal or plastic shaping；The buffer layer is molded with elastic material；The shielded layer includes the main body with plastic shaping
Layer and the magnetic field shielding film set on body layer side；The coil layer includes transmitting coil, receiving coil and coil backplate；
The magnetic field shielding film is magnetic conduction construction；
The shielded layer is close to outer casing, and far from coil layer, the magnetic field shielding film is located on the inside of shielded layer.
2. a kind of magnetic field shielding structure of metal probe according to claim 1, it is characterised in that：The outer casing is to mould
When material molding, electric field shielding film is equipped on the inside of it, electric field shielding film is conductive structure.
3. a kind of magnetic field shielding structure of metal probe according to claim 1, it is characterised in that：The shielded layer with it is outer
It is locked with the screw of dense distribution between backplate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721793760.8U CN207948012U (en) | 2017-12-20 | 2017-12-20 | A kind of magnetic field shielding structure of metal probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721793760.8U CN207948012U (en) | 2017-12-20 | 2017-12-20 | A kind of magnetic field shielding structure of metal probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207948012U true CN207948012U (en) | 2018-10-09 |
Family
ID=63704348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721793760.8U Active CN207948012U (en) | 2017-12-20 | 2017-12-20 | A kind of magnetic field shielding structure of metal probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207948012U (en) |
-
2017
- 2017-12-20 CN CN201721793760.8U patent/CN207948012U/en active Active
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