CN103839319B - Magnetic sensor device - Google Patents
Magnetic sensor device Download PDFInfo
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- CN103839319B CN103839319B CN201310606249.2A CN201310606249A CN103839319B CN 103839319 B CN103839319 B CN 103839319B CN 201310606249 A CN201310606249 A CN 201310606249A CN 103839319 B CN103839319 B CN 103839319B
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Abstract
The present invention provides a kind of magnetic sensor device, and this magnetic sensor device can be while by the gap turn narrow between transmission plane and the Magnet of medium, it is ensured that the rigidity of the cover plate being present between transmission plane and Magnet.Magnetic sensor device includes, Magnet, and the medium of reading object is magnetized by described Magnet；Cover plate, described cover plate has the transmission plane transmitting medium, and has the recess that the tip portion for Magnet is inserted and fixed overleaf in front；And support plate, described support plate stacking is fixed on the back side of cover plate, and is had the through hole that the rear section prominent from the opening of recess for Magnet inserts.Due to the size between bottom surface portions and transmission plane that the clearance G between transmission plane and Magnet is recess, even if therefore in the case of clearance G narrows, it is also possible to make the gauge of cover plate increase so that it is guaranteed that the rigidity of cover plate improve peel strength.
Description
Technical field
The present invention relates to a kind of magnetic pattern for media such as the bank note that printed by magnetic ink of detection
Magnetic sensor device.
Background technology
This magnetic sensor device includes medium carrying out magnetized magnetization Magnet and carrying out by magnetization Magnet
The magnetic-field detecting unit that the magnetic pattern of the medium after magnetization is read out.Magnetization Magnet is covered by cover plate, described lid
Plate has the transmission plane transmitting medium in its front, and cover plate prevents the loss of magnetization Magnet and comes off.
Owing to the gauge of cover plate is the gap between transmission plane and the magnetization Magnet transmitting medium, therefore need
Cover plate is thinning.But, according to thin cover plate, then existing owing to the rigidity of cover plate reduces, peel strength declines,
Therefore the problem that cover plate easily peels off from the housing of INVENTIONMagnetic sensing devices.
Patent documentation 1 describes following magnetic sensor device: in order to be not required to reduction covering magnetization Magnet
By the gap turn narrow between transmission plane and magnetization Magnet in the case of the rigidity of cover plate, and use composite plate as lid
Plate guarantees that rigidity, described composite plate have a thin face side cover plate and the back side of this face side cover plate is fixed in stacking
Rear side cover plate.In same document, the front of face side cover plate becomes transmission plane, and side cover plate is formed overleaf
There is the pilot hole embedded for magnetization Magnet.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2012-137451 publication
Summary of the invention
Invent technical problem to be solved
In patent documentation 1, ensure that the rigidity of entirety owing to cover plate is made up of composite plate.But, rule
Having determined the face side cover plate in gap between transmission plane and magnetization Magnet, for example, below 0.3mm's is very thin
Sheet material, rigidity declines, bends or distort and be easily deformed.Thus it is not easy to process this face side cover plate.
Here, if make the thickness increase of face side cover plate to guarantee rigidity, although the process of face side cover plate becomes
Easily, but the problem that there is the gap enlargement between transmission plane and magnetization Magnet.
In view of problem above, the technical problem of the present invention is to provide and a kind of is guaranteeing transmission plane that front is medium
In the case of the rigidity of cover plate, it is also possible to by the magnetic sensor of the gap turn narrow between transmission plane and magnetization Magnet
Device.
Solve the technical scheme that technical problem is used
In order to solve above-mentioned technical problem, the magnetic sensor device of the present invention is characterised by, including, magnetization
With Magnet, cover plate and support plate, the medium of reading object is magnetized by described magnetization Magnet, described cover plate
There is in front the transmission plane transmitting described medium, and there is part insertion for described magnetization Magnet overleaf
And fixing recess, described support plate stacking is fixed on the back side of described cover plate, and is had for described magnetization Magnet
The through hole that inserts of the prominent ledge of the opening from described recess.
According to the present invention, owing to cover plate and the support plate keeping the parts of magnetization Magnet to be fixed by stacking is constituted,
Therefore, it is possible to guarantee the integral rigidity of these parts.Thus it is possible to prevent cover plate and support plate from filling from magnetic sensor
The housing put peels off.Further, it is formed with recess owing to having the back side of the cover plate of transmission plane in front, and recessed at this
Portion is fixed with magnetization Magnet, and the gap therefore transmitted between the transmission plane of medium and magnetization Magnet becomes recess
Size between bottom surface portions and transmission plane.Therefore, even if guaranteeing the rigidity of cover plate to be easily processed cover plate
In the case of, it is also possible to by the gap turn narrow between transmission plane and magnetization Magnet.
In the present invention, it is preferred to when observing from the stacked direction of described cover plate with described support plate, described through
Hole is positioned at the inner side of described recess, and described magnetization Magnet is by being configured in described through hole, thus it is described
Position in recess is prescribed.Consequently, it is possible to after cover plate is fixed with support plate stacking, by from support plate
Magnetization Magnet is inserted in through hole by rear side, it is possible to make the configuration target location that magnetization Magnet is positioned on cover plate
(the configuration target location in recess).
In the present invention, it is preferred to described cover plate is nonmagnetic metal, the inner peripheral surface of described recess include bottom surface portions,
Annular wall part and curved surface portion, described bottom surface portions is parallel with described transmission plane, described annular wall part from
The described back side extends towards described transmission plane side, and described curved surface portion is by described bottom surface portions and described annular wall
Part connects, and described magnetization Magnet abuts with described bottom surface portions.If the recess being arranged at metal cover plate exists
There is between bottom surface portions and annular wall part curved surface portion, then can pass through etching, rotary type tower hexagon ring punching press,
Laser Processing etc. is readily formed recess.Here, due to the position of the Magnet on cover plate be not by the shape of recess come
Regulation, but specified by the through hole of support plate, even if what the magnetization Magnet the most not in recess was abutted
Corner is set between bottom surface portions and annular wall part, it is also possible to by magnet configuration configuration target position on cover plate
Put.Further, owing to curved surface portion is continuous at the outer circumferential side of the bottom surface portions of recess, as a result of which it is, to bottom surface
During part force, disperseed by curved surface portion stress.Therefore, it is possible to prevent or suppress the deformation of bottom surface portions.
Here, owing to bottom surface portions becomes the installed surface of magnetization Magnet, if the deformation of bottom surface portions therefore can be suppressed,
The gap between transmission plane and magnetization Magnet then can be made to keep equalization.
In the present invention, it is preferred to described recess is formed by etching.If being formed by etching, then easily by recess
Bottom surface portions be processed as the state parallel with transmission plane, and the gap between transmission plane and magnetization Magnet can be made
Keep equalization.
In the present invention, it is preferred to described support plate is fixed on the back side of described cover plate by binding agent stacking.So
One, engage cover plate compared with the situation that support plate engages with by diffusion, fix operation due to stacking and be easier to,
Therefore, it is possible to the manufacturing cost of restraining device.
In the present invention, it is preferred to described support plate engages stacking by diffusion is fixed on the back side of described cover plate.
In the present invention, it is preferred to the gauge of described magnetization Magnet is less than or equal to the deep of the recess of described cover plate
The total size of the gauge of degree size and described support plate.
In the present invention, it is preferred to the bottom surface portions at the top end face with described recess that make described magnetization Magnet abuts
State under, the described ledge of this magnetization Magnet is positioned at described through hole.
In the present invention, it is preferred to the gauge of described cover plate is bigger than the gauge of described support plate.
In the present invention, it is preferred to described magnetization Magnet is fixed on described cover plate and described supporting by binding agent
Plate, by the opening edge portion of the prominent described through hole in the inner side to described recess in described support plate with described
The space that the recess portions of the position of through hole outer peripheral side described in the ratio in recess is formed, is filled out by described binding agent
Full.Consequently, it is possible to the ratio through hole owing to being filled in the opening edge portion by support plate and recess is the most all
The binding agent in the space that the recess portions of the position of side is formed, plays as the anchor stoping magnetization Magnet to come off and makees
With, therefore, it is possible to magnetization Magnet is firmly secured to cover plate and support plate.
In the present invention, it is preferred to be provided with gap between described magnetization Magnet and the inner peripheral surface of described through hole.
Consequently, it is possible to after magnetization Magnet is inserted in through hole, it is possible to by these gaps to through hole and recess
Filling adhesive.Further, when utilizing binding agent fixed magnetization Magnet, it is possible to the Magnet in through hole at lid
Position on plate is finely adjusted whole.
According to the present invention, owing to the cover plate keeping the parts of magnetization Magnet to be fixed by stacking is constituted with support plate,
Therefore, it is possible to guarantee the integral rigidity of these parts.Therefore, it is possible to prevent cover plate and support plate from filling from magnetic sensor
The housing put peels off.Further, it is formed with recess owing to having the back side of the cover plate of transmission plane in front, and recessed at this
Portion is fixed with magnetization Magnet, and therefore, the gap transmitted between transmission plane and the magnetization Magnet of medium is recess
Size between bottom surface portions and transmission plane.Therefore, even if guaranteeing the firm of cover plate to easily locate capping plate
In the case of property, it is also possible to by the gap turn narrow between transmission plane and magnetization Magnet.
Accompanying drawing explanation
Fig. 1 is the explanatory diagram of the magnetic pattern detecting apparatus of the magnetic sensor device carrying the present invention.
Fig. 2 is the explanatory diagram of the magnetic sensor device of the present invention.
Fig. 3 is the axonometric chart of cover plate and support plate.
Fig. 4 is the explanatory diagram of magnetic sensor element.
Fig. 5 is excitation waveform and the detection waveform of magnetic sensor element.
Detailed description of the invention
Hereinafter, referring to the drawings, to the magnetic pattern detecting apparatus carrying the magnetic sensor device being suitable for the present invention
Illustrate.
(overall structure)
Fig. 1 is the explanatory diagram of the magnetic pattern detecting apparatus carrying the magnetic sensor device being suitable for the present invention.As
Shown in Fig. 1, magnetic pattern detecting apparatus 1 includes media transportation mechanism 4 and magnetic sensor device 5, is given an account of
Matter connecting gear 4 transmits the medium 2 of the lamellar such as banknote, marketable securities, described magnetic transducing along transmitting path 3
Device device 5 detects the magnetic pattern of medium 2 being arranged at the magnetic reading position A transmitted on path 3.
Magnetic sensor device 5 includes first magnetization Magnet group the 6, second magnetization Magnet group 7 and magnetic field inspection
Survey portion 8, the first direction X1 from medium direction of transfer X is read by described first magnetization Magnet group 6 by magnetic
Fetch bit is put the medium 2 of A and is magnetized, and described second magnetization Magnet group 7 is to from contrary with first direction X1
The medium 2 that second direction X2 reads position A by magnetic magnetizes, and described magnetic-field detecting unit 8 reads at quilt
First magnetization Magnet group 6 or the second magnetization Magnet group 7 have carried out, under magnetized state, reading position by magnetic
Put the magnetic pattern of the medium 2 of A.Magnetic-field detecting unit 8 is being applied with bias magnetic field to the medium 2 being magnetized
State under, magnetic flux is detected, magnetic pattern detecting apparatus 1 is by the inspection of self-magnetic field test section 8 in the future
Survey waveform to compare with reference waveform, thus judge the true and false and the kind of medium 2.
(magnetic sensor device)
Magnetic sensor device 5 is described in detail with reference to Fig. 2, Fig. 3.Fig. 2 (a) is for representing magnetic sensor device
In 5, the first magnetization magnetizes the axonometric chart of the layout using Magnet group 7 and magnetic-field detecting unit 8 with Magnet group 6, second,
Fig. 2 (b) is the diagrammatic cross-sectional view of magnetic sensor device 5, and Fig. 2 (c) is to be expanded by the periphery of magnetization Magnet
The partial sectional view represented.What Fig. 3 (a) was the stacked fixing cover plate observed from below with support plate is vertical
Body figure, Fig. 3 (b) is the axonometric chart of the cover plate observed from below, Fig. 3 (c) be observe from below
The axonometric chart of board.It addition, in the following description, for convenience's sake, upper and lower, to magnetic according to accompanying drawing
Illustrating up and down of sensor device 5.
Magnetic sensor device 5, as shown in Figure 2 (a) shows, including framework 10, cover plate 11 and support plate 12,
Described framework 10 carries magnetic-field detecting unit 8, and described cover plate 11 is installed on the upper part of this framework 10.Cover plate
11 tops being laminated in support plate 12, and engaged by diffusion or binding agent etc. is fixing thus form as one.
First magnetization Magnet group 6 and the second magnetization Magnet group 7 are formed cover plate 11 and the support plate of one
12 keep.As shown in Fig. 2 (b), in order to make to respectively constitute the first magnetization Magnet group 6 and the second magnetization use
Multiple Magnet 16 of Magnet group 7 are not lost by the medium 2 being read position A by magnetic, and cover plate 11 covers respectively
The upper part of Magnet 16.Support plate 12 supports the lower portion of each Magnet 16 from side.
Framework 10 is formed by nonmagnetic substances such as resins.As shown in Fig. 2 (b), in the upper surface 101 of framework 10
The middle body of medium direction of transfer X be formed with the recess 102 of rectangle, the recess 102 of described rectangle is used for pacifying
Fill the cover plate 11 and support plate 12 formed as one.Arrange in the both sides of the medium direction of transfer X of recess 102
Have towards outside and the inclined plane 103 that tilts downwards.
Recess 102 has constant depth, and extends along the direction orthogonal with medium direction of transfer X with fixed width.
Middle body at the medium direction of transfer X of recess 102 is constituted magnetic-field detecting unit 8.Magnetic-field detecting unit 8 upper
End face is sensor cover 8a, and is positioned in the plane identical with the upper surface of framework 10.Magnetic-field detecting unit 8 includes
Multiple magnetic sensor element 13, the plurality of magnetic sensor element 13 is orthogonal with medium direction of transfer X
Arrange with specified gap on direction.
Cover plate 11 is nonmagnetic stainless steel.As shown in Figure 3 (b), cover plate 11 has the profile of rectangle
While shape, the middle body at medium direction of transfer X has the peristome 111 of rectangle.Cover plate 11 is just
Face is the transmission plane 11a for transmitting medium 2.Back side 11b(lower surface at cover plate 11) split shed portion 111
The upstream side of first direction X1 be formed with the first recess group 112.Further, in the second direction of peristome 111
The downstream of X2 is formed with the second recess group 113.First recess group 112 and the second recess group 113 wrap respectively
Include multiple recess 114, these multiple recesses 114 respectively on the direction orthogonal with medium direction of transfer X with necessarily
Gap arrangement.
The opening 114a of each recess 114 is rectangular.Further, as shown in Figure 2 (c), the inner circumferential of each recess 114
Face includes bottom surface portions 114b, annular wall part 114c and sweep 114d, described bottom surface portions 114b
Parallel with transmission plane 11a, described annular wall part 114c from the back side 11b of cover plate 11 towards transmission plane 11a's
Side extends, and bottom surface portions 114b is connected by described curved surface portion 114d with annular wall part 114c.Bending
Face part 114d is the part of the arc-shaped making bottom surface portions 114b be connected with annular wall part 114c.Peristome
111, first recess group's 112(recess 114) and second recess group's 113(recess 114) formed by etching.
Support plate 12 is nonmagnetic stainless steel, and has certain thickness.As shown in Figure 3 (c), support plate
The contour shape of 12 is identical with the contour shape of cover plate 11, and the middle body of medium direction of transfer X have with
The peristome 121 of peristome 111 same shape.Further, support plate 12 is at the first direction X1 of peristome 121
Upstream side there is the first through hole group 122, the upstream side in second direction X2 of peristome 121 has second
Through hole group 123.First through hole group 122 and the second through hole group 123 are respectively included on above-below direction and pass through
Logical multiple through holes 124, these multiple through holes 124 in the direction orthogonal with medium direction of transfer X with necessarily
Gap arrangement.The flat shape of each through hole 124 observed from above-below direction is rectangle.Peristome 121,
Consistent group of holes 122(through hole 124) and second through hole group's 123(through hole 124) formed by etching.
When above-below direction is observed, cover plate 11 is consistent with peristome 121 at its peristome 111 with support plate 12
State under, stacked fixing.When cover plate 11 is in laminated arrangement with support plate 12, from above-below direction (lid
Plate 11 and the stacked direction of support plate 12) observe time, each through hole 124 of support plate 12 is arranged in and covers
The position of each recess 114 overlap of plate 11.Further, as shown in Figure 2 (c), the peristome 114a of each recess 114
Bigger than the flat shape of each through hole 124, and when above-below direction is observed, each through hole 124 is positioned at each recess
The inner side of 114.
As in figure 2 it is shown, the first magnetization Magnet group 6 and the second magnetization Magnet group 7 include multiple magnetic respectively
Ferrum (magnetization Magnet) 16.Each Magnet 16 is the permanent magnet such as ferrite or neodium magnet, and has phase each other
Same magnetic force.Further, each Magnet 16 in the rectangular shape of each through hole 124 being inserted in support plate 12,
And be of similar shape each other.
When making each Magnet 16 be held in be formed cover plate 11 and the support plate 12 of one, first, will be each
Magnet 16, relative to cover plate 11 and support plate 12, is inserted in each of this support plate 12 from support plate 12 side
Through hole 124.It is to say, tip portion 16a of the direction of insertion of each Magnet 16 is inserted in cover plate 11
In recess 114, and its top end face 16b is made to abut with the bottom surface portions 114b of recess 114.Thus, each Magnet
Rear section (ledge) 16c prominent for the opening 114a from each recess 114 in 16 is positioned at through hole 124
In.
Here, when the stacked direction of cover plate 11 and support plate 12 is observed, each through hole 124 is positioned at each recessed
The inner side in portion 114.Therefore, the Magnet 16 by Magnet 16 is inserted in through hole 124, in recess 114
Position be prescribed.It is to say, by being configured in through hole 124 by Magnet 16, Magnet 16 is configured in
Configuration target location (the configuration target location in recess 114) on cover plate 11.It addition, the layer of each Magnet 16
The gauge in folded direction, as shown in Figure 2 (c), less than or equal to depth dimensions and the support plate 12 of recess 114
Gauge be added gained total size.Therefore, if making top end face 16b and the recess 114 of each Magnet 16
Bottom surface portions 114b be in the state of abutting, the rear end of the direction of insertion of the most each Magnet 16 is in not from support plate
The back side 12b(lower surface of 12) project to outside state.
It follows that each Magnet 16 is fixed in cover plate 11 and support plate 12 by binding agent R.It is to say,
After the bottom surface portions 114b of the top end face 16b with recess 114 that make each Magnet 16 is in the state abutted, bonding
Agent R is filled in each through hole 124 and the recess 114 of this support plate 12 from support plate 12 side, logical
Cross this binding agent R, complete fixing to cover plate 11 and support plate 12 of each Magnet 16.
Here, the size that each Magnet 16 is seamlessly fitted together to without respect to each through hole 124, and at each Magnet
It is provided with gap between 16 and the inner peripheral surface of each through hole 124.Therefore, it is possible to pass through each Magnet 16 is inserted in
After through hole 124, by these gaps to through hole 124 and recess 114 filling adhesive R.Further, pass through
Filling adhesive R, thus opening by the prominent through hole 124 in the inner side towards recess 114 in support plate 12
The recess portions of the position of through hole 124 outer peripheral side described in ratio in mouth marginal portion 12c and recess 114
The space S that 114e is formed, is filled up by binding agent R.As a result of which it is, fill up the binding agent R of space S as resistance
The anchor that only Magnet 16 comes off plays a role, therefore, it is possible to more reliably fixed magnet 16.Further, since respectively
Be provided with gap between the inner peripheral surface of Magnet 16 and each through hole 124, therefore by binding agent by each Magnet 16
Time fixing, it is possible in each through hole 124, each Magnet 16 position on cover plate 11 is finely adjusted whole.
If each Magnet 16 is kept by cover plate 11 and support plate 12, then by each recess 114 of the first recess group 112
And first through hole group 122 each through hole 124 keep each Magnet 16 constitute the first magnetization Magnet group 6,
The each magnetic kept by each recess 114 of the second recess group 113 and each through hole 124 of the second through hole group 123
Ferrum 16 constitutes the second magnetization Magnet group 7.Each Magnet 16 of the first magnetization Magnet group 6 with medium sender
To direction orthogonal for X with certain interval arrange, each Magnet 16 of the second magnetization Magnet group 7 with medium transmission
Direction orthogonal for direction X arranges with certain interval.Further, when medium direction of transfer X observes, the first magnetization
Overlapping with the Magnet 16 of Magnet group 6 and the Magnet 16 of the second magnetization Magnet group 7.
If using binding agent will to keep the first magnetization Magnet group 6 and cover plate 11 of the second magnetization Magnet group 7
And support plate 12 is installed on the recess 102 of framework 10, the most as shown in Figure 2 (a) shows, at the opening of cover plate 11
The inner side in portion 111 is inserted with the position of cover plate 11 side of magnetic-field detecting unit 8, and the transmission plane 11a of cover plate 11
In the same plane with the sensor cover 8a of magnetic-field detecting unit 8.Further, in the first party of magnetic-field detecting unit 8
It is configured with the first magnetization Magnet group 6, in second direction X2 upper of magnetic-field detecting unit 8 to the upstream side of X1
Trip side is configured with the second magnetization Magnet group 7.And, magnetic-field detecting unit 8 be positioned at the first magnetization Magnet group 6 with
The second magnetization centre of Magnet group 7, and when medium direction of transfer X observes, magnetic-field detecting unit 8 is carried
Multiple magnetic sensor element 13 respectively with Magnet 16 and the second magnetization magnetic of the first magnetization Magnet group 6
The Magnet 16 of ferrum group 7 is overlapping.
It addition, in the present example, as shown in Figure 2 (a) shows, in each first magnetization with Magnet group 6 and second
Magnetization is with in Magnet group 7, and multiple Magnet adjacent on the direction orthogonal with medium direction of transfer X are each other with phase
Anti-direction magnetizes.More particularly, be arranged on the direction orthogonal with medium direction of transfer X many
In individual Magnet 16, for a Magnet 16, the end being positioned at transmission plane 11a side is magnetized into N pole, will
Its end being positioned at transmission plane 11a opposite side is magnetized into S pole, for orthogonal with medium direction of transfer X
Direction on the Magnet 16 adjacent with this Magnet 16, the end being positioned at transmission plane 11a is magnetized into S pole, will
Its end being positioned at transmission plane 11a opposite side is magnetized into N pole.
It addition, in the present example, as shown in Fig. 2 (b), on medium direction of transfer X opposed first
The magnetization Magnet 16 and second of Magnet group 6 magnetizes with the Magnet 16 of Magnet group 7, clips magnetic between different magnetic poles
Property sensor device and opposed.Specifically, the first opposed on medium direction of transfer X magnetization Magnet group 6
Magnet 16 and the second magnetization with in the Magnet 16 of Magnet group 7, the Magnet 16 of a side is positioned at transmission plane
The end of 11a side is magnetized into N pole, by the end of the side being positioned at transmission plane 11a of the Magnet 16 of the opposing party
It is magnetized into S pole.Further, since the first magnetization by the distance between Magnet group 6 and magnetic-field detecting unit 8 equal to the
Two magnetization distances between Magnet group 7 and magnetic-field detecting unit 8, therefore, in the position being configured with magnetic-field detecting unit 8
Putting, the first magnetization magnetic field of Magnet group 6 neutralizes with the second magnetization magnetic field of Magnet group 7.
(magnetic sensor element)
Fig. 4 is the explanatory diagram of the magnetic sensor element 13 being loaded in magnetic-field detecting unit 8.Magnetic sensor unit
Part 13 includes the laminal sensor iron core 131 being made up of amorphous alloy or permalloy, and will sensing
The thickness direction of device iron core 131 is configured to towards medium direction of transfer X.By at sensor iron core 131 winding line
Circle, constitutes the magnet exciting coil 132 for producing bias magnetic field and for detecting the detection of the magnetic pattern of medium 2
Coil 133.
Saying in further detail, sensor iron core 131 includes main part 131a, from the upper end of main part 131a
The middle body first teat 131b prominent towards transmission plane 11a side, in the opposite side of the first teat 131b
And prominent downward the second teat 131c of the middle body from the bottom of main part 131a and from main body
The both sides of the first teat 131b of the upper end of portion 131a and the second teat 131c of the bottom of main part 131a
Prominent respectively the 3rd teat 131d in both sides.Magnet exciting coil 132 is by winding coil in main part 131a
Constitute in the position being clipped between the first teat 131b and the second teat 131c and the 3rd teat 131d.Inspection
Test coil 133 is constituted by coil is wound in the first teat 131b.
(the magnetic pattern detection action of magnetic pattern detecting apparatus)
With reference to Fig. 1, Fig. 4 and Fig. 5, the magnetic pattern detection action to magnetic pattern detecting apparatus illustrates.
Fig. 5 (a) is the excitation waveform of magnetic sensor elements 13, and Fig. 5 (b) is from magnetic sensor element 13
Detection waveform.As it is shown in figure 1, in magnetic pattern detecting apparatus 1, if medium 2 is transmitting on path 3, edge
First direction X1 or second direction X2 are transmitted, then medium 2 arrives before magnetic reads position A by first
Magnetization Magnet group 6 or the second magnetization Magnet group 7 magnetize.Then, the medium 2 after magnetization passes through magnetic field detection
The magnetic in portion 8 reads position A.
In magnetic-field detecting unit 8, as shown in Fig. 5 (a), apply to hand over constant current to magnet exciting coil 132
Time-dependent current, forms the bias magnetic field being represented by dashed line in Fig. 4 around sensor iron core 131.If medium 2
It is sent to magnetic and reads position A, then export the letter of the detection waveform shown in Fig. 5 (b) from detection coil 133
Number.Detection waveform is the differential signal relative to bias magnetic field and time.
Here, the shape of detection waveform, peak value and valley from magnetic sensor element 13 are formed because being used for
The kind of the magnetic ink of magnetic pattern, the position of magnetic pattern and the depth of magnetic pattern formed and become
Change.Therefore, by this detection waveform is compareed with the reference waveform prestored, it is possible to judge medium 2
The true and false and differentiate medium 2 kind.
(action effect)
According to this example, due to the cover plate 11 that keeps the parts of Magnet 16 to be fixed by stacking and to form as one with
And support plate 12 is constituted, it is ensured that the integral rigidity of these parts.Therefore, it is possible to prevent cover plate 11 and prop up
Board 12 peels off from the framework 10 of magnetic sensor device 5.
Further, the back side 11b of the cover plate 11 in front with transmission plane 11a is formed with recess 114, recessed at this
Portion 114 is connected with Magnet 16.Therefore, the clearance G (ginseng between transmission plane 11a and the Magnet 16 of medium 2 is transmitted
According to Fig. 2 (c)) it is the size between the bottom surface portions 114b of recess 114 and transmission plane 11a.Therefore, though
By thickening for cover plate 11 so that it is guaranteed that in the case of the rigidity of cover plate 11, it is also possible to by transmission plane 11a and Magnet 16
Between clearance G narrow.
Here, in the present example, as it ensure that the rigidity of cover plate 11, therefore the peel strength of cover plate 11 carries
High such that it is able to prevent or suppress cover plate 11 to peel off from support plate 12.
Further, as it ensure that the rigidity of cover plate 11, therefore, it is possible to suppression cover plate 11 bends or distorts, from
And it is prevented from the deformation of cover plate 11.Therefore, in the manufacturing process of device, the process of cover plate 11 becomes easy.
It is additionally, since bending or distortion, the therefore transmission plane 11a inhibiting the cover plate 11 keeping Magnet 16
And the clearance G between Magnet 16 keeps equalization.
Further, in the present example, as it ensure that the rigidity of cover plate 11, therefore the peel strength of cover plate 11 carries
High.Therefore, when cover plate 11 and support plate 12 stacking are fixed, it is possible to use binding agent.Here, make
In the case of cover plate 11 and support plate 12 stacking being fixed with binding agent, engage cover plate 11 with by diffusion
Compared with the situation that support plate 12 engages, owing to stacking fixed operation is relatively simple, therefore, it is possible to the system of restraining device
Cause this.
It follows that in the present example, the outer circumferential side at the bottom surface portions 114b of recess 114 is provided with bending continuously
Face part 114d.Therefore, when applying power to bottom surface portions 114b, stress passes through curved surface portion 114d quilt
Dispersion.As a result of which it is, be prevented from or suppress the deformation of bottom surface portions 114b.Here, due to bottom surface portions
114b is the installed surface of Magnet 16, therefore, if the deformation of bottom surface portions 114b can be suppressed, then can make biography
The gap between face 11a and Magnet 16 is sent to keep equalization.
Further, in the present example, the allocation position of the Magnet 16 on cover plate 11 is not by the recess 114 of cover plate 11
Shape regulation, but specified by the through hole 124 of support plate 12.Therefore, even if not at the end of recess 114
Corner is formed, it is also possible to be arranged on cover plate 11 by Magnet 16 between face part 114b and annular wall part 114c
Configuration target location.Here, due to through by support plate 12 of the allocation position of the Magnet 16 on cover plate 11
Hole 124 specifies, even if therefore having curved surface portion 114d at recess 114 at the outer circumferential side of bottom surface portions 114b
In the case of, it is also possible to easily Magnet 16 is configured to the bottom surface portions do not interfered with curved surface portion 114d
Position on 114b.
And, in the present example, due to Magnet 16 is configured on cover plate 11 configuration target location time, no
Need to be formed corner between bottom surface portions 114b and annular wall part 114c, it is possible to formed recessed by etching
Portion 114.
Further, in the present example, owing to forming recess 114 by etching, therefore, it is possible to by the bottom surface of recess 114
Part 114b is processed as the state parallel with transmission plane 11a exactly.Therefore, it is possible to avoid transmission plane 11a with
Clearance G between each Magnet 16 is unequal or produces the problems such as deviation.
(other embodiments)
In the above example, although employ etching and form the recess 114 of cover plate 11, but owing to need not the end of at
Corner is formed between face part 114b and annular wall part 114c, therefore, it is possible to use rotary type tower hexagon ring punching press,
Laser Processing etc. replaces etching..
In the above example, the gauge of cover plate 11 is bigger than the gauge of support plate 12, but cover plate 11
Also can have the gauge identical with support plate 12.Further, the gauge of support plate 12 is also than cover plate
The gauge of 11 is big.
In the above example, when each Magnet 16 is fixed on cover plate 11 and support plate 12, each Magnet is utilized
Gap between 16 and the inner peripheral surface of each through hole 124, carries out micro-to each Magnet 16 position on cover plate 11
Adjust, but also can the inner peripheral surface part of side with each through hole 124 by making each Magnet 16 abut, and incite somebody to action
Each Magnet 16 positions.
Further, in the above example, the gauge of each Magnet 16 is the depth dimensions less than or equal to recess 114
With the total size of the gauge of support plate 12, but can also than add up to size big.It is to say, each magnetic
The rear end of the direction of insertion of ferrum 16 also can project to outside from the back side 12b of support plate 12.
Symbol description
2 media
5 magnetic sensor devices
11 cover plates
11a transmission plane
The 11b back side
11c opening edge portion
12 support plates
16 Magnet (magnetization Magnet)
The fore-end (a part of) of 16a Magnet
The rear section (ledge) of 16c Magnet
114 recesses
114a opening
114b bottom surface portions
114c annular wall part
114d curved surface portion
114e recess portions
124 through holes
R binding agent
S space
Claims (10)
1. a magnetic sensor device, it is characterised in that including:
Magnetization Magnet, the medium of reading object is magnetized by described magnetization Magnet；
Cover plate, described cover plate has the transmission plane transmitting described medium, has overleaf for described magnetization in front
The recess being inserted and fixed by a part for Magnet；And,
Support plate, described support plate stacking is fixed on described cover plate, and have for described magnetization Magnet from institute
State the through hole that the prominent ledge of the opening of recess inserts,
When observing from the stacked direction of described cover plate with described support plate, described through hole is positioned at described recess
Inner side,
By being configured in described through hole, described magnetization Magnet position in described recess is prescribed.
Magnetic sensor device the most according to claim 1, it is characterised in that
Described cover plate is nonmagnetic metal；
The inner peripheral surface of described recess includes the bottom surface portions parallel with described transmission plane, from the described back side towards described
Annular wall part that transmission plane side extends and bending that described bottom surface portions is connected with described annular wall part
Face part；
Described magnetization Magnet abuts with described bottom surface portions.
Magnetic sensor device the most according to claim 2, it is characterised in that
Described recess is formed by etching.
Magnetic sensor device the most according to claim 1, it is characterised in that
Described support plate is fixed on the back side of described cover plate by binding agent stacking.
Magnetic sensor device the most according to claim 1, it is characterised in that
Described support plate engages stacking by diffusion and is fixed on the back side of described cover plate.
Magnetic sensor device the most according to claim 1, it is characterised in that
The gauge of described magnetization Magnet is less than or equal to the depth dimensions of the recess of described cover plate and described supporting
The total size of the gauge of plate.
Magnetic sensor device the most according to claim 6, it is characterised in that
When the bottom surface portions of the top end face with described recess that make described magnetization Magnet abuts, this magnetization
It is positioned at described through hole with the described ledge of Magnet.
Magnetic sensor device the most according to claim 1, it is characterised in that
The gauge of described cover plate is bigger than the gauge of described support plate.
9., according to the magnetic sensor device described in any one claim in claim 1 to 8, its feature exists
In,
Described magnetization Magnet by binding agent be fixed on described cover plate and described support plate,
The opening edge portion of the described through hole highlighted by the inner side towards described recess in described support plate
Described with the space that the recess portions of the position of through hole outer peripheral side described in the ratio in described recess is formed
Binding agent fills up.
Magnetic sensor device the most according to claim 9, it is characterised in that
It is provided with gap between described magnetization Magnet and the inner peripheral surface of described through hole.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-257903 | 2012-11-26 | ||
| JP2012257903A JP6188314B2 (en) | 2012-11-26 | 2012-11-26 | Magnetic sensor device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103839319A CN103839319A (en) | 2014-06-04 |
| CN103839319B true CN103839319B (en) | 2016-08-17 |
Family
ID=50802780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310606249.2A Expired - Fee Related CN103839319B (en) | 2012-11-26 | 2013-11-25 | Magnetic sensor device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6188314B2 (en) |
| CN (1) | CN103839319B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5881925B1 (en) * | 2014-07-25 | 2016-03-09 | 三菱電機株式会社 | Magnetic sensor device and manufacturing method thereof |
| JP6789711B2 (en) * | 2016-07-29 | 2020-11-25 | キヤノン電子株式会社 | Magnetic identification device |
| JP2023097943A (en) * | 2021-12-28 | 2023-07-10 | グローリー株式会社 | Magnetic feature detection device, and paper sheet identification device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH027585U (en) * | 1988-06-29 | 1990-01-18 | ||
| CN102592349A (en) * | 2010-12-28 | 2012-07-18 | 日本电产三协株式会社 | Magnetic sensor device and method for manufacturing magnetic sensor device |
| CN102610021A (en) * | 2010-12-28 | 2012-07-25 | 日本电产三协株式会社 | Magnetic sensor unit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4283708A (en) * | 1979-06-13 | 1981-08-11 | Rowe International, Inc. | Paper currency acceptor |
| EP2363854B1 (en) * | 2006-02-17 | 2014-07-16 | Nidec Sankyo Corporation | Medium processor and magnetic head adaptable to same |
-
2012
- 2012-11-26 JP JP2012257903A patent/JP6188314B2/en not_active Expired - Fee Related
-
2013
- 2013-11-25 CN CN201310606249.2A patent/CN103839319B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH027585U (en) * | 1988-06-29 | 1990-01-18 | ||
| CN102592349A (en) * | 2010-12-28 | 2012-07-18 | 日本电产三协株式会社 | Magnetic sensor device and method for manufacturing magnetic sensor device |
| CN102610021A (en) * | 2010-12-28 | 2012-07-25 | 日本电产三协株式会社 | Magnetic sensor unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014106050A (en) | 2014-06-09 |
| JP6188314B2 (en) | 2017-08-30 |
| CN103839319A (en) | 2014-06-04 |
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