CN217113398U - Currency detection magnetic head - Google Patents
Currency detection magnetic head Download PDFInfo
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- CN217113398U CN217113398U CN202220786363.2U CN202220786363U CN217113398U CN 217113398 U CN217113398 U CN 217113398U CN 202220786363 U CN202220786363 U CN 202220786363U CN 217113398 U CN217113398 U CN 217113398U
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Abstract
The utility model discloses a currency detecting magnetic head, which is applied to a paper currency detector and comprises a shielding shell, wherein an opening is arranged on a working surface at the top of the shielding shell, a double-magnetic-circuit magnetic core unit is arranged in the shielding shell, and a working end of the double-magnetic-circuit magnetic core unit extends out of the opening; the two sides of the working end of the double-magnetic-circuit magnetic core unit are provided with a constant magnet and a resin layer, the resin layer covers the constant magnet, and the constant magnet and the resin layer are located in the opening. Residual magnetic force lines generated by the metal safety lines in the paper money are induced through the double-magnetic-circuit magnetic core unit to generate electromotive force, and the currency detection magnetic head outputs corresponding anti-counterfeiting characteristic signals, so that anti-counterfeiting characteristic information recorded by the metal safety lines in the paper money is read; the permanent magnet magnetizes the soft magnetic material in the paper currency magnetic ink pattern, and the anti-counterfeiting characteristic information recorded in the paper currency magnetic ink pattern can be read by the currency detection magnetic head.
Description
Technical Field
The utility model relates to a magnetism detects the discernment technical field, especially relates to a currency examine magnetic head.
Background
The paper money such as Euro, RMB, Korean and the like is provided with a metal safety line and a magnetic ink pattern of magnetic anti-counterfeiting characteristic information, the metal safety line is made of hard magnetic material and records the remanence of the magnetic anti-counterfeiting characteristic information, and the remanence generates magnetic lines of force. The traditional coil type small magnetic head for currency detection arranged in the currency detector can induce the residual magnetic force line of the Euro security line to generate electromotive force and output corresponding anti-counterfeiting characteristic signals during currency detection.
However, the anti-counterfeiting magnetic ink in the magnetic ink pattern on the paper currency is made of soft magnetic materials without remanence, and does not generate remanence magnetic lines, so that the traditional coil type small magnetic head cannot read anti-counterfeiting characteristic information recorded in the pattern ink on various paper currencies, and the counterfeit identification capability of the traditional coil type currency detection magnetic head for identifying true and false paper currencies is greatly reduced.
Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's above-mentioned defect, provide a currency examine magnetic head, aim at promoting the pseudo-ability of distinguishing to paper currency.
The utility model provides a technical scheme that technical problem adopted as follows:
a currency detection magnetic head is applied to a paper currency detector and comprises a shielding shell, wherein an opening is formed in a working surface of the top of the shielding shell, a double-magnetic-circuit magnetic core unit is arranged in the shielding shell, and a working end of the double-magnetic-circuit magnetic core unit extends out of the opening; the two sides of the working end of the double-magnetic-circuit magnetic core unit are provided with a constant magnet and a resin layer, the resin layer covers the constant magnet, and the constant magnet and the resin layer are located in the opening.
The currency detecting magnetic head is characterized in that the working end of the double-magnetic-circuit magnetic core unit, the resin layer and the working face are all located on the same arc-shaped face.
The magnetic head for bank note detection, wherein the double magnetic circuit magnetic core unit comprises: the magnetic core structure comprises two magnetic cores which are oppositely arranged, a middle magnetic plate arranged between the two magnetic cores, a gap piece arranged between the middle magnetic plate and the magnetic cores, a wire frame arranged on the magnetic cores, a coil arranged on the wire frame and a binding post assembly electrically connected with the end part of the coil; one end of the lug assembly extends towards the bottom of the shielding shell and is arranged outside the shielding shell.
The currency detecting magnetic head is characterized in that a magnetic core seat is arranged in the shielding shell, an accommodating cavity is arranged on the magnetic core seat, a through hole is formed in the top of the accommodating cavity, and the through hole corresponds to the opening; the double-magnetic-circuit magnetic core unit is positioned in the accommodating cavity, and the working end of the double-magnetic-circuit magnetic core unit penetrates through the through hole and extends out of the opening.
The currency detecting magnetic head further comprises at least one elastic sheet, and the elastic sheet is located in the accommodating cavity and is respectively in contact with the inner wall of the accommodating cavity and the double-magnetic-circuit magnetic core unit.
The bottom of the elastic piece is connected with the inner wall of the accommodating cavity; when the double-magnetic-circuit magnetic core unit is not assembled with the accommodating cavity, the top of the elastic sheet is far away from the inner wall of the accommodating cavity.
The currency detecting magnetic head is characterized in that an L-shaped mounting groove is formed in the position, close to the through hole, of the magnetic core seat, and the constant magnet part is located in the L-shaped mounting groove.
The currency detecting magnetic head is characterized in that an assembly gap is formed between the top of the magnetic core seat and the shielding shell, and the assembly gap is communicated with the opening; the resin layer extends into the fitting gap.
Has the advantages that: when the currency detecting magnetic head is used, residual magnetic force lines generated by the metal safety lines in the paper currency are induced through the double-magnetic-circuit magnetic core unit to generate electromotive force, and the currency detecting magnetic head outputs corresponding anti-counterfeiting characteristic signals, so that anti-counterfeiting characteristic information recorded by the metal safety lines in the paper currency is read. Furthermore, the permanent magnets are respectively arranged in the opening and on two sides of the working end of the double-magnetic-circuit magnetic core unit, and the permanent magnets magnetize soft magnetic materials in the paper currency magnetic ink patterns, so that the anti-counterfeiting characteristic information recorded in the paper currency magnetic ink patterns can be read by the currency detection magnetic head. Therefore, currency examine magnetic head not only can read the hard magnetism anti-counterfeiting characteristic information on the paper currency, can also read the soft magnetism anti-counterfeiting characteristic information on the paper currency.
Drawings
FIG. 1 is a partial cross-sectional view of the currency detecting head of the present invention;
FIG. 2 is a schematic view of a portion of the magnetic core holder according to the present invention;
fig. 3 is a schematic structural diagram of the shielding case of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model provides a currency detection magnetic head, the currency detection magnetic head is applied to paper currency detector, as shown in figure 1 and figure 3, the currency detection magnetic head includes a shielding shell 1, an opening 2 is arranged on a working face 11 at the top of the shielding shell 1, wherein, a double-magnetic-circuit magnetic core unit 3 is arranged in the shielding shell 1, and the working end of the double-magnetic-circuit magnetic core unit 3 extends out of the opening 2; the two sides of the working end of the double-magnetic-circuit magnetic core unit 3 are both provided with a constant magnet 4 and a resin layer 5, the resin layer 5 covers the constant magnet 4, and the constant magnet 4 and the resin layer 5 are both positioned in the opening 2.
When the currency detecting magnetic head is used, residual magnetic force lines generated by the metal safety lines in the paper currency are induced through the double-magnetic-circuit magnetic core unit 3 to generate electromotive force, and the currency detecting magnetic head outputs corresponding anti-counterfeiting characteristic signals, so that anti-counterfeiting characteristic information recorded by the metal safety lines in the paper currency is read. Furthermore, the permanent magnets 4 are respectively arranged in the opening 2 and on two sides of the working end of the double-magnetic-circuit magnetic core unit 3, and the permanent magnets 4 magnetize soft magnetic materials in the paper currency magnetic ink pattern, so that the anti-counterfeiting feature information recorded in the paper currency magnetic ink pattern can be read by the currency detection magnetic head. Therefore, currency examine magnetic head not only can read the hard magnetism anti-counterfeiting characteristic information on the paper currency, can also read the soft magnetism anti-counterfeiting characteristic information on the paper currency.
In the currency examine magnetic head, permanent magnet 4 is located 2 departments of opening, the installation of both being convenient for permanent magnet 4 can guarantee again read the soft-magnetic anti-fake characteristic information on the paper currency when currency examine magnetic head uses. In addition, the currency detection magnetic head adopts a structure of a double-magnetic-circuit magnetic core unit 3, so that common-mode rejection interference and noise reduction can be realized. The method can be applied to large currency detectors with large electromagnetic interference. The permanent magnet 4 is covered with the resin layer 5 to prevent the permanent magnet 4 from being exposed to the outside and causing rusting. The permanent magnet 4 is a neodymium iron boron permanent magnet.
The working end of the double-magnetic-circuit magnetic core unit 3, the constant magnet 4 and the working surface 11 are all located on the same arc-shaped surface, so that the moving of the currency detection magnetic head on the paper currency is smoother, and the working end of the double-magnetic-circuit magnetic core unit 3 can be exposed out of the opening 2 to read anti-counterfeiting characteristic information on the paper currency.
The double-magnetic-circuit core unit 3 includes: two magnetic cores 31, a middle magnetic plate 32, two gap sheets 33, two wire frames 34, two coils 35 and a binding post assembly 36; the two magnetic cores 31 are oppositely arranged, the middle magnetic plate 32 is arranged between the two magnetic cores 31, one gap piece 33 is arranged between the middle magnetic plate 32 and each magnetic core 31, and the gap piece 33 is not magnetic. Each magnetic core 31 is provided with a coil holder 34, and each coil holder 34 is correspondingly wound with a coil 35; one end of the terminal assembly 36 is electrically connected to the two coils 35, and the other end extends to the bottom of the shielding case 1 and is disposed outside the shielding case 1.
The wiring column assembly 36 consists of three wiring columns which are arranged at intervals in sequence; the central terminals are electrically connected to the two coils 35, respectively, i.e., the central terminal of the two three terminals is shared by the two coils 35.
The magnetic cores 31 are コ -shaped, the two コ -shaped magnetic cores 31 can be combined into a door shape, and the upper ends of the two magnetic cores 31 are respectively in a slope shape, so that the upper ends of the two magnetic cores 31 which are oppositely arranged are in a tip shape; the bobbin 34 is fitted over the lower end of the magnetic core 31. The magnetic core 31 is stamped from permalloy.
The channel detection width of the double-magnetic-circuit magnetic core unit 3 is 180 mm; the length of the shielding shell 1 is 199mm, the width of the shielding shell is 18mm, and the height of the shielding shell is 15 mm; the length of the opening 2 is 191 mm.
A magnetic core seat 6 is arranged in the shielding shell 1, an accommodating cavity 62 is arranged on the magnetic core seat 6, a through hole 61 is arranged at the top of the accommodating cavity 62, the position of the through hole 61 corresponds to the position of the opening 2, and the through hole 61 is respectively communicated with the opening 2 and the accommodating cavity 62; the accommodating cavity 62 is matched with the double-magnetic-circuit magnetic core unit 3. The double-magnetic-circuit magnetic core unit 3 is positioned in the accommodating cavity 62 and is connected with the magnetic core seat 6; the working end of the double magnetic circuit magnetic core unit 3 passes through the through hole 61 and the opening 2 in sequence and extends out of the opening 2.
The magnetic core holder 6 is connected with the shielding shell 1 through a screw. An L-shaped mounting groove 63 is formed in the magnetic core seat 6 close to the through hole 61, and the L-shaped mounting groove 63 is matched with the permanent magnet 4; the length of the through hole 61 is smaller than that of the opening 2, so that the L-shaped mounting groove 63 can be exposed from the opening 2, and the permanent magnet 4 can be mounted in the L-shaped mounting groove 63. The top of the permanent magnet 4 is located in the opening 2 and below the working surface 11. After the installation of permanent magnet 4 is accomplished, to arrange in opening 2 resin layer 5, and make resin layer 5 covers permanent magnet 4 avoids when permanent magnet 4 rusts, can also promote permanent magnet 4's installation stability.
As shown in fig. 1 and 2, the banknote checking magnetic head further includes at least one elastic sheet 7, and the elastic sheet 7 is located in the accommodating cavity 62 and is respectively in contact with the inner wall of the accommodating cavity 62 and the dual-magnetic-circuit magnetic core unit 3, so that the stability of fixing the dual-magnetic-circuit magnetic core unit 3 in the accommodating cavity 62 is enhanced by the elastic sheet 7.
In one embodiment of the present invention, the number of the elastic pieces 7 is two, and two the elastic pieces 7 are symmetrically arranged on the opposite sides of the accommodating cavity 62. The bottom of the elastic sheet 7 is connected with the inner wall of the accommodating cavity 62; when the double-magnetic-circuit magnetic core unit 3 is not installed in the accommodating cavity 62, as shown in fig. 2, the top of the elastic sheet 7 is suspended and inclined toward the center of the accommodating cavity 62; that is, when the double-magnetic-circuit core unit 3 is not mounted in the housing cavity 62, the elastic piece 7 is inclined from bottom to top toward the center of the housing cavity 62, so as to guide the mounting of the double-magnetic-circuit core unit 3.
When the double-magnetic-circuit magnetic core unit 3 is installed, the double-magnetic-circuit magnetic core unit 3 is inserted into the accommodating cavity 62 from the bottom of the shielding shell 1 upwards, the elastic sheet 7 is gradually pressed by the double-magnetic-circuit magnetic core unit 3 until the working end of the double-magnetic-circuit magnetic core unit 3 sequentially penetrates through the through hole 61 and the opening 2 and extends out of the opening 2, the top of the elastic sheet 7 is respectively contacted with the inner wall of the accommodating cavity 62 and the double-magnetic-circuit magnetic core unit 3, and the elastic sheet 7 is in a compressed state.
An assembly gap is formed between the top of the magnetic core seat 6 and the shielding shell 1, and the assembly gap is communicated with the opening 2 and the L-shaped mounting groove 63; the resin layer 5 extends into the assembly gap and between the constant magnet 4 and the working end of the dual-magnetic-circuit magnetic core unit 3, so that the rest part of the constant magnet 4 except the part connected with the L-shaped mounting groove 63 is covered by the resin layer 5, the constant magnet 4 is more stably mounted in the shielding shell 1, and the connection structure between the magnetic core holder 6 and the shielding shell 1 is more stable.
The installation process of currency examine magnetic head as follows:
firstly, tightly inserting the terminal on the coil holder 34, then winding 1100 coils 35 on the coil holder 34 by using a winding machine, and electrically connecting the end parts of the coils 35 with the terminal assembly 36;
putting the double-magnetic-circuit magnetic core unit 3 into the magnetic core seat 6, sleeving a wire frame 34 on the bottom of the magnetic core 31, arranging a gap piece 33 between the magnetic core 31 and the middle magnetic plate 32, and welding the magnetic core 31, the gap piece 33 and the middle magnetic plate 32 by laser to fasten the magnetic core 31, the gap piece 33 and the middle magnetic plate together;
installing the magnetic core holder 6 provided with the double-magnetic-circuit magnetic core unit 3 into the shielding shell 1, so that the working end of the double-magnetic-circuit magnetic core unit 3 extends out of the opening 2, one end of the terminal post assembly 36 extends out of the bottom of the shielding shell 1, and the shielding shell 1 and the magnetic core holder 6 are locked by using screws;
a permanent magnet 4 is installed on each of both sides of the working end of the dual magnetic path core unit 3, the permanent magnets 4 are arranged in the L-shaped installation grooves 63, and resin is injected from the opening 2 so as to extend into the assembly gap between the core holder 6 and the shield case 1 and cover the permanent magnets 4.
Hardening the resin at a high temperature to form the resin layer 5, and polishing the resin layer 5 by using an arc polishing machine to form a smooth arc surface on the working surface 11 and the resin layer 5.
As shown in fig. 1 and 3, a bottom cover 8 is disposed at the bottom of the shielding shell 1, as shown in fig. 3, three wire through holes 9 are disposed on the bottom cover 8, and three terminals respectively pass through the three wire through holes 9 and extend out of the shielding shell 1.
To sum up, the utility model provides a currency examine magnetic head uses during the currency examine magnetic head, through the remanence magnetic line of force that the metal safety line in the double magnetic circuit magnetic core unit response paper currency produced produces the electromotive force, the corresponding anti-fake characteristic signal of currency examine magnetic head output to the anti-fake characteristic information of metal safety line record in the reading paper currency. Furthermore, the permanent magnets are respectively arranged in the opening and on two sides of the working end of the double-magnetic-circuit magnetic core unit, and the permanent magnets magnetize soft magnetic materials in the paper currency magnetic ink patterns, so that the anti-counterfeiting characteristic information recorded in the paper currency magnetic ink patterns can be read by the currency detection magnetic head. Therefore, currency examine magnetic head not only can read the hard magnetism anti-counterfeiting characteristic information on the paper currency, can also read the soft magnetism anti-counterfeiting characteristic information on the paper currency.
It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (8)
1. A currency detecting magnetic head is applied to a paper currency detector and comprises a shielding shell, wherein an opening is formed in the working surface of the top of the shielding shell; the two sides of the working end of the double-magnetic-circuit magnetic core unit are provided with a constant magnet and a resin layer, the resin layer covers the constant magnet, and the constant magnet and the resin layer are located in the opening.
2. The magnetic head of claim 1, wherein the working end of the dual magnetic core unit, the resin layer, and the working face are all located on a same arc.
3. Banknote validating head according to claim 1, wherein said dual magnetic core unit comprises: the magnetic core structure comprises two magnetic cores which are oppositely arranged, a middle magnetic plate arranged between the two magnetic cores, a gap piece arranged between the middle magnetic plate and the magnetic cores, a wire frame arranged on the magnetic cores, a coil arranged on the wire frame and a binding post assembly electrically connected with the end part of the coil; one end of the lug assembly extends towards the bottom of the shielding shell and is arranged outside the shielding shell.
4. The magnetic head for currency detection according to claim 1 wherein a magnetic core holder is disposed in the shield shell, and a receiving cavity is disposed on the magnetic core holder, and a through hole is disposed at the top of the receiving cavity and corresponds to the opening; the double-magnetic-circuit magnetic core unit is positioned in the accommodating cavity, and the working end of the double-magnetic-circuit magnetic core unit penetrates through the through hole and extends out of the opening.
5. The magnetic banknote validating head of claim 4, further comprising at least one resilient tab positioned within the receiving cavity and contacting an inner wall of the receiving cavity and the dual magnetic circuit core unit, respectively.
6. The banknote validating head of claim 5, wherein a bottom of the resilient tab is coupled to an inner wall of the receiving cavity; when the double-magnetic-circuit magnetic core unit is not assembled with the accommodating cavity, the top of the elastic sheet is far away from the inner wall of the accommodating cavity.
7. The magnetic head for currency examination as claimed in claim 4, wherein said core block is provided with an L-shaped mounting slot adjacent to said aperture, said permanent magnet being partially disposed in said L-shaped mounting slot.
8. The banknote validating head of claim 7, wherein a mounting gap is provided between a top of the core print and the shield shell, the mounting gap being in communication with the opening; the resin layer extends into the fitting gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220786363.2U CN217113398U (en) | 2022-04-06 | 2022-04-06 | Currency detection magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220786363.2U CN217113398U (en) | 2022-04-06 | 2022-04-06 | Currency detection magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217113398U true CN217113398U (en) | 2022-08-02 |
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ID=82580888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220786363.2U Active CN217113398U (en) | 2022-04-06 | 2022-04-06 | Currency detection magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217113398U (en) |
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2022
- 2022-04-06 CN CN202220786363.2U patent/CN217113398U/en active Active
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