CN209625382U - Sound Magnetic Sensor - Google Patents
Sound Magnetic Sensor Download PDFInfo
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- CN209625382U CN209625382U CN201920075919.5U CN201920075919U CN209625382U CN 209625382 U CN209625382 U CN 209625382U CN 201920075919 U CN201920075919 U CN 201920075919U CN 209625382 U CN209625382 U CN 209625382U
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- lift magnet
- magnetic
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- magnetizer
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Abstract
The utility model discloses a kind of sound Magnetic Sensors comprising: hollow shell；Resonance plate is disposed in the housing；Lift magnet, be disposed in the housing or the shell outside, and for for the resonance plate providing bias magnetic field；And the magnetizer made of permeability magnetic material, with the lift magnet for being oppositely arranged towards the side of bias magnetic field interference source, and for carrying out magnetic conduction to the bias magnetic field；Wherein, by the bias magnetic field after magnetic conduction, so that the resonance frequency range of the resonance plate is consistent with the operating frequency range of the sound Magnetic Sensor.Sound Magnetic Sensor provided by the utility model can not only be fixed in general goods and packaging, and be fixed on the irony packing material of ferromagnetism commodity surface or commodity and can also work normally.
Description
Technical field
The utility model relates to sound magnetic technology fields, more particularly, to a kind of sound Magnetic Sensor.
Background technique
Sound Magnetic Sensor generally makees commodity anti-theft purposes, referring to Fig. 1, mainly by shell 100, work in setting resonance frequency
The resonance plate 101 of rate (generally 58khz) and the biasing magnetic sheet 102 this three of bias magnetic field is provided for the resonance of resonance plate 101
It is grouped as.Wherein, resonance plate is set in the housing in the hollow cavity 103 having, and biasing magnetic sheet 102 is set to the bottom surface of shell 100,
Double-sided adhesive 104 is additionally provided on the bottom surface of shell 100.
The antitheft working principle of sound Magnetic Sensor are as follows: sound Magnetic Sensor is set to protected commodity by the way that double-sided adhesive 104 is viscous
On, after customer chooses the commodity for pasting sound Magnetic Sensor inside shop, need to be worked people at cashier by cash register
Member's respective handling (such as cash register staff removes sound Magnetic Sensor from commodity, or deactivates to sound Magnetic Sensor
So that sound Magnetic Sensor fails), it, just will not be by Anti-theft detection device when such customer passes through the detection zone in shop with commodity
It detects and triggers alarm；If the respective handling that commodity do not pass through cash register staff is just taken away by customer, then passing through
When detection zone, the resonance plate 101 of the sound Magnetic Sensor on commodity can receive the electricity that the antenna of Anti-theft detection device is launched
Magnetostatic wave signal, the signal frequency of the electromagnetic wave signal and the resonant frequency of resonance plate 101 are almost the same, so that resonance plate
101 are resonated under the action of biasing the bias magnetic field of magnetic sheet 102 with the resonant frequency, and to the antenna of Anti-theft detection device
Electromagnetic wave signal corresponding with resonant frequency is returned to, so that Anti-theft detection device detects and triggers alarm, to realize quotient
Product it is antitheft.
The present inventor has found in the practice of the invention, and following technical problem exists in the prior art: when sound magnetic passes
When sensor is fixed on the irony packing material of ferromagnetism commodity surface or commodity, sound Magnetic Sensor cisco unity malfunction and fail.
The reason of the present inventor is by furtheing investigate, finding its failure are as follows: since the biasing magnetic sheet 102 of sound Magnetic Sensor produces
Raw bias magnetic field died down by the magnetic conduction of ferromagnetism commodity surface or irony packing material 105 (i.e. ferromagnetism commodity surface or
Irony packing material 105 interferes with bias magnetic field as bias magnetic field interference source), and the bias magnetic field to die down makes resonance plate
101 resonant frequency generates larger offset (far from 58khz), can thus make sound Magnetic Sensor cisco unity malfunction and lose
Effect.
Utility model content
In view of the above-mentioned problems, being fixed on ferromagnetism quotient the purpose of this utility model is to provide a kind of sound Magnetic Sensor
It can also be worked normally on the irony packing material of product surface or commodity.
To achieve the goals above, an embodiment of the present invention provides a kind of sound Magnetic Sensor comprising:
Hollow shell；
Resonance plate is disposed in the housing；
For providing the lift magnet of bias magnetic field for the resonance plate, be disposed in the housing or the shell outside；
And
The magnetizer of magnetic conduction is made and is used to carry out the bias magnetic field of permeability magnetic material, with the lift magnet
For being oppositely arranged towards the side of bias magnetic field interference source；
Wherein, by the bias magnetic field after magnetic conduction, so that the resonance frequency range of the resonance plate and the sound magnetic pass
The operating frequency range of sensor is consistent.
As an improvement of the above scheme, the lift magnet and the magnetizer are laminated structure.
As an improvement of the above scheme, the length of the magnetizer is greater than or equal to the length of the lift magnet, described
The width of magnetizer is greater than or equal to the width of the lift magnet.
As an improvement of the above scheme, the magnetizer is to lead made of magnetic permeability μ >=10 Henry/rice permeability magnetic material
Magnet；Wherein, the permeability magnetic material is pure iron, magnetic steel, silicon steel, ferrite, neodymium iron boron, rubber magnet, plastic magnetic, amorphous material
Material, nanocrystalline material or permalloy；
The resonance plate is the resonance plate made of non-crystalline material；
The lift magnet is the lift magnet made of semi-hard magnet or permanent-magnet material.
As an improvement of the above scheme, the magnetizer is fixed on the side of the lift magnet.
It as an improvement of the above scheme, further include the first double-sided adhesive；The magnetizer passes through first sticking double faced adhesive tape
In on the side of the lift magnet.
As an improvement of the above scheme, the lift magnet is set on the bottom surface of the shell, the institute of the lift magnet
State the side that side is the bottom surface far from the shell.
It as an improvement of the above scheme, further include the second double-sided adhesive and release paper；The release paper passes through described second pair
Face gluing is affixed in the one side far from the lift magnet of the magnetizer.
Another embodiment of the utility model provides a kind of sound Magnetic Sensor, comprising: hollow shell, resonance plate and is used for
The lift magnet of bias magnetic field is provided for the resonance plate；
The resonance plate is disposed in the housing；
The lift magnet is disposed in the housing, and is had for towards the side of bias magnetic field interference source；
The position of the side towards the lift magnet of the shell is made of permeability magnetic material, for described
Bias magnetic field carries out magnetic conduction；
Wherein, by the bias magnetic field after magnetic conduction, so that the resonance frequency range of the resonance plate and the sound magnetic pass
The operating frequency range of sensor is consistent.
As an improvement of the above scheme, the shell includes bottom case lid and hollow and bottom made of the permeability magnetic material
The plastic shell of face opening；
The bottom case lid is covered on the opening of the plastic shell；
The side of the lift magnet, with being connected in the plastic shell on one side of the bottom case lid.
Compared with the prior art, the sound Magnetic Sensor provided by the embodiment of the utility model, by the biasing magnetic
Body for towards the side of bias magnetic field interference source be relatively set with the magnetizer or the shell towards it is described partially
The position for setting the side of magnet is made of permeability magnetic material, carries out magnetic conduction with the bias magnetic field generated to the lift magnet,
And the bias magnetic field after magnetic conduction, so that the working frequency of the resonance frequency range of the resonance plate and the sound Magnetic Sensor
Range is consistent, and therefore, the position sound magnetic made of permeability magnetic material for adding the magnetizer or the shell passes
Sensor can work normally.When the irony packing material that the sound Magnetic Sensor is fixed on ferromagnetism commodity surface or commodity is (i.e. inclined
Set magnetic interference source) on when, due to the position of the magnetizer or the shell be located at the side of lift magnet with
Between ferromagnetism commodity surface or irony packing material, therefore the position of the magnetizer or the shell is by ferromagnetism
Commodity surface or irony packing material are effectively isolated with the lift magnet, the bias magnetic field that the lift magnet described in this way generates
The magnetic line of force will not again largely pass through ferromagnetism commodity surface or irony packing material, so ferromagnetism commodity surface or irony packaging
Object not will lead to the bias magnetic field that the lift magnet generates and obviously die down, to not interfere with the resonance work of the resonance plate
Make and (its resonant frequency will not be made to generate larger offset).It can be seen that even if the sound Magnetic Sensor is fixed on ferromagnetic
On the irony packing material of property commodity surface or commodity, the sound Magnetic Sensor can also be worked normally.
Detailed description of the invention
It, below will be to attached needed in embodiment in order to illustrate more clearly of the technical solution of the utility model
Figure is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the utility model, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is that the sound Magnetic Sensor of the prior art is fixed on showing on the irony packing material of ferromagnetism commodity surface or commodity
It is intended to；
Fig. 2 is the cross-sectional view of the first sound Magnetic Sensor provided by the embodiment of the utility model；
Fig. 3 is the cross-sectional view of second of sound Magnetic Sensor provided by the embodiment of the utility model；
Fig. 4 is the cross-sectional view of the third sound Magnetic Sensor provided by the embodiment of the utility model
Attached drawing mark explanation: 1. shells；10. bottom case lid；11. plastic shell；12. resonant cavity；2. resonance plate；3. biasing magnetic
Body；4. magnetizer；5. the first double-sided adhesive；6. the second double-sided adhesive；7. release paper.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
In the description of the utility model embodiment, it is to be understood that term " on ", "lower", "top", "bottom", "inner",
The orientation or positional relationship of the instructions such as "outside" is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing this reality
With new embodiment, rather than the device or component of indication or suggestion meaning must have a particular orientation, with specific orientation
Construction and operation, therefore should not be understood as the limitation to the utility model embodiment.
In addition, term first, second, third, etc. in the specification and in the claims is only used for difference same technique spy
The description purpose of sign is not understood to indicate or imply relative importance or implicitly indicates the number of indicated technical characteristic
Amount, also not necessarily describes order or time sequencing.Term can be interchanged in a suitable case.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include at least one of the features.
Embodiment one:
Referring to fig. 2, Fig. 2 is a kind of structural schematic diagram of sound Magnetic Sensor provided by the embodiment of the utility model.The sound
Magnetic Sensor includes: shell 1, resonance plate 2, lift magnet 3 and magnetizer 4.The shell 1 is hollow structure, in the shell 1
It is formed with resonant cavity 12 to resonate for the resonance plate 2, the resonance plate 2 is set in the resonant cavity 12 of the shell 1.It is described
Lift magnet 3 is set to outside the shell 1, and for providing bias magnetic field for the resonance plate 2.The magnetizer 4 is by magnetic conduction material
Material is made, with the lift magnet 3 for being oppositely arranged towards the side of bias magnetic field interference source, and for described inclined
It sets magnetic field and carries out magnetic conduction；Wherein, by the bias magnetic field after magnetic conduction, so that the resonance frequency range of the resonance plate 2 and institute
The operating frequency range for stating sound Magnetic Sensor is consistent.
In the present embodiment, by being used to set towards the side of bias magnetic field interference source is opposite in the lift magnet 3
It is equipped with the magnetizer 4, and the magnetizer 4 can carry out magnetic conduction to the bias magnetic field that the lift magnet 3 generates, and after magnetic conduction
The bias magnetic field so that the operating frequency range phase of the resonance frequency range of the resonance plate 2 and the sound Magnetic Sensor
Unanimously, therefore, the sound Magnetic Sensor for adding the magnetizer 4 can work normally.When the sound Magnetic Sensor is fixed on
When on the irony packing material (i.e. bias magnetic field interference source) of ferromagnetism commodity surface or commodity, since the magnetizer 4 is set to partially
It sets between the side of magnet 3 and ferromagnetism commodity surface or irony packing material, therefore the magnetizer 4 is by ferromagnetism
Commodity surface or irony packing material are effectively isolated with the lift magnet 3, the biasing magnetic that the lift magnet 3 described in this way generates
The magnetic line of force of field will not largely pass through ferromagnetism commodity surface or irony packing material again, so ferromagnetism commodity surface or irony packet
Dress object not will lead to the bias magnetic field that the lift magnet 3 generates and obviously die down, to not interfere with being total to for the resonance plate 2
Vibration work (will not make its resonant frequency generate larger offset, for example, resonant frequency offset in 0.5kHz or less).Thus
As it can be seen that the sound magnetic passes even if the sound Magnetic Sensor is fixed on the irony packing material of ferromagnetism commodity surface or commodity
Sensor can also work normally.
It should be pointed out that the irony packing material of ferromagnetism commodity surface or commodity is only the bias magnetic field interference source
One of which, the bias magnetic field interference source can also be other types, such as: one with outer scattered magnetic field product (such as
The motor in outer scattered magnetic field), if outer scattered magnetic field being effectively isolated without the magnetizer 4, it will the larger enhancing biasing magnetic
The bias magnetic field of body 3, so that the resonant frequency that will lead to the resonance plate 2 deviates.As long as that is, can be to the lift magnet
3 bias magnetic field generates the object for significantly interfering with (i.e. obvious to become strong or die down) and the resonance plate 2 being caused to be unable to normal resonant,
Belong to the bias magnetic field interference source.
In addition, it should be noted that, the quantity of the resonance plate 2 and the lift magnet 3 all can be one or one
More than, it is not specifically limited herein.The quantity of the magnetizer 4 may be one or more, when the magnetizer 4
When quantity is more than one, the magnetizer 4 can be stacked or be spliced between each other the bigger magnetic conduction of a block size
Plate etc., is also not specifically limited herein.
In addition, it is understood that referring to Fig. 3, the lift magnet 3, can also be in addition to can be set other than the shell 1
Be arranged in the shell 1, for example, the lift magnet 3 be arranged on the interior bottom of the shell 1 and be set to the shell
The resonance plate 2 in 1 is in layered arrangement.Referring to fig. 2 with Fig. 3, and the magnetizer 4 be also possible to be arranged in the shell 1
Outside the interior or described shell 1, as long as ensuring that the magnetizer 4 and the side of the lift magnet 3 are oppositely arranged, thus
When ensuring that the sound Magnetic Sensor is close or is fixed on the bias magnetic field interference source, the magnetizer 4 is located at the biasing
Between magnet 3 and the bias magnetic field interference source, the magnetizer 4 described in this way can effectively completely cut off the bias magnetic field interference source pair
The interference of the bias magnetic field of the lift magnet 3.
In this embodiment, it is preferred that the lift magnet 3 and the magnetizer 4 are laminated structure, be conducive in this way
The sound Magnetic Sensor it is thinner.Certainly, the lift magnet 3 and the magnetizer 4 can also for wavelike structure or
Person is arc surfaced structure etc., is not specifically limited herein.
In the above-described embodiments, preferably, the length of the magnetizer 4 is greater than or equal to the length of the lift magnet 3,
The width of the magnetizer 4 is greater than or equal to the width of the lift magnet 3, in this way can be more effectively by the lift magnet
3 are isolated with the bias magnetic field interference source, thus the bias magnetic field for more effectively avoiding the lift magnet 3 from generating by
The interference of the bias magnetic field interference source.It is understood that the length of the magnetizer 4 can also be slightly less than the biasing magnetic
The length of body 3, the width of the magnetizer 4 can also also be slightly less than the width of the lift magnet 3, as long as the magnetizer 4
Size can ensure that the bias magnetic field interference source will not significantly interfere with the bias magnetic field, do not do have herein
Body limits.
In the above-described embodiments, the magnetizer 4 is the magnetic conduction made of magnetic permeability μ >=10 Henry/rice permeability magnetic material
Body；Wherein, the permeability magnetic material is pure iron, magnetic steel, silicon steel, ferrite, neodymium iron boron, rubber magnet, plastic magnetic, amorphous material
Material, nanocrystalline material or permalloy.The resonance plate 2 is preferably made of non-crystalline material.And the lift magnet 3 is preferably by half
Hard Magnetic or permanent-magnet material are made.Certainly, the lift magnet 3 can also be made of soft magnetic materials, as long as being made of soft magnetic materials
The lift magnet 3 generate the bias magnetic field can effectively be maintained at setting time or more can (such as effectively keep 1
Year or more).
In the above-described embodiments, specifically, referring to fig. 2 with Fig. 3, the shell 1 includes bottom case lid 10 and hollow and bottom
The plastic shell 11 of face opening；The bottom case lid 10 is covered on the opening of the plastic shell 11, by by the shell
Body 1 divides for 11 two parts of the bottom case lid 10 and the plastic shell, is installed on the shell 1 in this way convenient for the resonance plate 2
It is interior or taken out out of described shell 1.Preferably, the material of the plastic shell 11 is polystyrene or polyethylene, the bottom case
The material that lid 10 covers is polyethylene or polyester.
In the above-described embodiments, specifically, the operating frequency range of the sound Magnetic Sensor is 20-200khz, such as can
Think 58KHz.
In the above-described embodiments, preferably, referring to fig. 2, the magnetizer 4 is fixed on described the one of the lift magnet 3
On side.Specifically, the magnetizer 4 is pasted on the side of the lift magnet 3 by the first double-sided adhesive 5.
It is understood that the magnetizer 4 can also be arranged with the side interval of the lift magnet 3.
Further, referring to fig. 2, the lift magnet 3 is set on the bottom surface of the shell 1, the institute of the lift magnet 3
State the side that side is the bottom surface far from the shell 1.Wherein, the length and width dimensions of first double-sided adhesive 5 are greater than the magnetic conduction
The size of body 4, in this way, the side of first double-sided adhesive 5 in addition to the magnetizer 4 to be fixed on to the lift magnet 3
On, the side of first double-sided adhesive 5 can also be pasted with the bottom surface of the shell 1, it may be assumed that first double-sided adhesive 5 will be described
Lift magnet 3 wraps up and is pasted on the bottom surface of the shell 1.
More specifically, referring to fig. 2, the sound Magnetic Sensor further includes the second double-sided adhesive 6 and release paper 7；The release paper 7
By second double-sided adhesive 6 be pasted on the magnetizer 4 far from the lift magnet 3 one side on, in this way when need by
When the sound Magnetic Sensor is fixed on the packing material of commodity, it is only necessary to the release paper 7 be torn, then pass through described second
Double-sided adhesive 6 is pasted on the packing material of commodity.
It is understood that the mode that the sound Magnetic Sensor is fixed on the packing material of commodity can also be snapping or
It is bundled with adhesive plaster, is not specifically limited herein.
Embodiment two:
Referring to fig. 4, the utility model embodiment provides a kind of sound Magnetic Sensor, comprising: hollow shell 1, resonance plate 2
And for providing the lift magnet 3 of bias magnetic field for the resonance plate 2.Resonant cavity 12 is formed in the shell 1 for described total
The piece 2 that shakes resonates, and the resonance plate 2 is set in the resonant cavity 12 of the shell 1.The lift magnet 3 is set to the shell 1
It is interior, and have for towards the side of bias magnetic field interference source；Specifically, the lift magnet 3 is with the resonance plate 2 described
It is in layered arrangement in shell 1.Position (such as the bottom of shell 1 of the side towards the lift magnet 3 of the shell 1
Portion or side etc.) it is made of permeability magnetic material, for carrying out magnetic conduction to the bias magnetic field；Wherein, by described inclined after magnetic conduction
Magnetic field is set, so that the resonance frequency range of the resonance plate 2 is consistent with the operating frequency range of the sound Magnetic Sensor.
In the present embodiment, by by the position of the side towards the lift magnet 3 of the shell 1 by magnetic conduction
Material is made, and carries out magnetic conduction with the bias magnetic field that generates to the lift magnet 3, and the bias magnetic field after magnetic conduction, so that
The resonance frequency range of the resonance plate 2 is consistent with the operating frequency range of the sound Magnetic Sensor, therefore, the shell 1
The position be made of permeability magnetic material the sound Magnetic Sensor can be allowed to work normally.When the sound Magnetic Sensor is fixed on iron
When on the irony packing material (i.e. bias magnetic field interference source) of magnetic commodity surface or commodity, due to the position of the shell 1
Between the side and ferromagnetism commodity surface or irony packing material of lift magnet 3, therefore the institute of the shell 1
It states position and is effectively isolated on ferromagnetism commodity surface or irony packing material with the lift magnet 3, the biasing magnetic described in this way
The magnetic line of force for the bias magnetic field that body 3 generates will not largely pass through ferromagnetism commodity surface or irony packing material again, so ferromagnetism
Commodity surface or irony packing material not will lead to the bias magnetic field that the lift magnet 3 generates and obviously die down, to will not influence
To the resonance work (its resonant frequency will not be made to generate larger offset) of the resonance plate 2.It can be seen that even if will be described
Sound Magnetic Sensor is fixed on the irony packing material of ferromagnetism commodity surface or commodity, and the sound Magnetic Sensor also can normal work
Make.
Further, since the present embodiment only by the position of the side towards the lift magnet 3 of the shell 1 by
Permeability magnetic material is made, so that it may even if ensuring that the sound Magnetic Sensor is fixed on the irony packaging of ferromagnetism commodity surface or commodity
It can also be worked normally on object, compared to sound Magnetic Sensor described in embodiment one, the present embodiment described in still further setting without leading
Magnet 4, therefore cost can be saved and the structure of the sound Magnetic Sensor can be made more simple and compact.
It is understood that after the position of the shell 1 made of the permeability magnetic material completes, then with institute
Remaining position for stating shell 1 is fixedly connected.
In the present embodiment, specifically, the shell 1 includes the bottom case lid 10 made of the permeability magnetic material and hollow
And the plastic shell 11 of bottom opening；The bottom case lid 10 is covered on the opening of the plastic shell 11；The biasing
The side of magnet 3, with being connected in the plastic shell 11 on one side of the bottom case lid 10.In this way, when described
When bottom case lid 10 is fixed on the irony packing material of (such as by way of stickup) ferromagnetism commodity surface or commodity, by institute
It states bottom case lid 10 to be made of permeability magnetic material, therefore can be by ferromagnetism commodity surface or irony packing material and the lift magnet 3
It is effectively isolated, such ferromagnetism commodity surface or irony packing material would not influence the resonance work of the resonance plate 2.
It should be noted that the particular content of the various aspects of the embodiment of the present invention sound Magnetic Sensor can also correspond to reference
To the associated description of the sound Magnetic Sensor in embodiment one, it is not repeated to describe herein.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, any those skilled in the art is in technical scope disclosed by the utility model, the change that can readily occur in
Change or replace, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with described
Subject to scope of protection of the claims.
Claims (10)
1. a kind of sound Magnetic Sensor characterized by comprising
Hollow shell；
Resonance plate is disposed in the housing；
For providing the lift magnet of bias magnetic field for the resonance plate, be disposed in the housing or the shell outside；And
The magnetizer of magnetic conduction is made and is used to carry out the bias magnetic field of permeability magnetic material, with being used for for the lift magnet
It is oppositely arranged towards the side of bias magnetic field interference source；
Wherein, by the bias magnetic field after magnetic conduction, so that the resonance frequency range of the resonance plate and the sound Magnetic Sensor
Operating frequency range it is consistent.
2. sound Magnetic Sensor according to claim 1, which is characterized in that the lift magnet and the magnetizer are piece
Shape structure.
3. sound Magnetic Sensor according to claim 1, which is characterized in that the length of the magnetizer is greater than or equal to described
The length of lift magnet, the width of the magnetizer are greater than or equal to the width of the lift magnet.
4. sound Magnetic Sensor according to claim 1, which is characterized in that
The magnetizer is the magnetizer made of magnetic permeability μ >=10 Henry/rice permeability magnetic material；Wherein, the permeability magnetic material
It is closed for pure iron, magnetic steel, silicon steel, ferrite, neodymium iron boron, rubber magnet, plastic magnetic, non-crystalline material, nanocrystalline material or perm
Gold；
The resonance plate is the resonance plate made of non-crystalline material；
The lift magnet is the lift magnet made of semi-hard magnet or permanent-magnet material.
5. sound Magnetic Sensor according to any one of claims 1 to 4, which is characterized in that the magnetizer is fixed on described
On the side of lift magnet.
6. sound Magnetic Sensor according to claim 5, which is characterized in that further include the first double-sided adhesive；The magnetizer is logical
First sticking double faced adhesive tape is crossed on the side of the lift magnet.
7. sound Magnetic Sensor according to claim 5, which is characterized in that the lift magnet is set to the bottom surface of the shell
On, the side of the lift magnet is the side of the bottom surface far from the shell.
8. sound Magnetic Sensor according to claim 7, which is characterized in that further include the second double-sided adhesive and release paper；It is described
Release paper is by second sticking double faced adhesive tape in the one side far from the lift magnet of the magnetizer.
9. a kind of sound Magnetic Sensor characterized by comprising hollow shell, resonance plate and for being provided for the resonance plate
The lift magnet of bias magnetic field；
The resonance plate is disposed in the housing；
The lift magnet is disposed in the housing, and is had for towards the side of bias magnetic field interference source；
The position of the side towards the lift magnet of the shell is made of permeability magnetic material, for the biasing
Magnetic field carries out magnetic conduction；
Wherein, by the bias magnetic field after magnetic conduction, so that the resonance frequency range of the resonance plate and the sound Magnetic Sensor
Operating frequency range it is consistent.
10. sound Magnetic Sensor according to claim 9, which is characterized in that the shell includes by the permeability magnetic material system
At bottom case lid and hollow and bottom opening plastic shell；
The bottom case lid is covered on the opening of the plastic shell；
The side of the lift magnet, with being connected in the plastic shell on one side of the bottom case lid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920075919.5U CN209625382U (en) | 2019-01-16 | 2019-01-16 | Sound Magnetic Sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920075919.5U CN209625382U (en) | 2019-01-16 | 2019-01-16 | Sound Magnetic Sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209625382U true CN209625382U (en) | 2019-11-12 |
Family
ID=68450145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920075919.5U Active CN209625382U (en) | 2019-01-16 | 2019-01-16 | Sound Magnetic Sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209625382U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109697817A (en) * | 2019-01-16 | 2019-04-30 | 广州齐达材料科技有限公司 | Sound Magnetic Sensor |
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2019
- 2019-01-16 CN CN201920075919.5U patent/CN209625382U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109697817A (en) * | 2019-01-16 | 2019-04-30 | 广州齐达材料科技有限公司 | Sound Magnetic Sensor |
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