Currency detection magnetic head and currency detector

Abstract

The utility model discloses a currency detection magnetic head and a currency detector, the currency detection magnetic head comprises a shielding shell, a plurality of magnetic core units and a plurality of first magnetism isolating plates, and one side of the shielding shell is provided with an opening arranged along the length direction of the shielding shell; a plurality of magnetic core units are arranged in the shielding shell at intervals along the length direction of the shielding shell, and one side of each magnetic core unit penetrates through the opening and is used for reading a magnetic characteristic anti-counterfeiting signal on a banknote; a plurality of first magnetism isolating plates are located in the shielding shell and arranged on the two sides of the magnetic core unit. According to the utility model, the two sides of the magnetic core unit are provided with the first magnetism isolating plates so as to isolate a part of electromagnetic field generated by the magnetic core unit, thereby achieving the purpose of noise reduction in the checking process of banknotes.

Description

Technical Field

[0001] The utility model relates to the technical field of banknote checking equipment, in particular to a banknote checking magnetic head and a banknote checking machine. Background Art

[0002] The banknote verification magnetic head is usually installed on the banknote verification equipment to read the magnetic characteristic anti-counterfeiting signal on the banknote to check the authenticity of the banknote.

[0003] However, the existing banknote verification magnetic head generates a strong electromagnetic field and emits a large noise when reading the magnetic characteristic anti-counterfeiting signal on the banknote.

[0004] In view of this, the existing technology still needs to be improved and enhanced. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a currency verification magnetic head and a currency verification machine, aiming to reduce the technical problem of noise generated during the inspection of banknotes.

[0006] The technical solution adopted by the utility model to solve the technical problem is as follows:

[0007] Technical Solution 1

[0008] A currency verification magnetic head comprises a shielding shell, one side of the shielding shell is provided with openings arranged along the length direction of the shielding shell; the currency verification magnetic head further comprises:

[0009] A plurality of magnetic core units are arranged in the shielding shell at intervals along the length direction of the shielding shell, and one side of the magnetic core unit passes through the opening, so as to read the magnetic characteristic anti-counterfeiting signal on the banknote;

[0010] A plurality of first magnetic isolation plates are located in the shielding shell and arranged on both sides of the magnetic core unit.

[0011] As a further improved technical solution, the banknote verification magnetic head further includes:

[0012] Two magnetic seats are fixedly connected to two opposite sides of the shielding shell and are fixedly connected to the magnetic core unit.

[0013] As a further improved technical solution, the magnetic core unit includes:

[0014] Two magnetic cores, one of which is fixedly connected to one of the magnetic seats, and the other magnetic core is fixedly connected to the other magnetic seat;

[0015] The middle magnetic plate is located between the two magnetic cores;

[0016] Two gap sheets, one of which is located between the middle magnetic plate and one of the magnetic cores, and the other gap sheet is located between the middle magnetic plate and the other magnetic core;

[0017] Two wire racks, one wire rack is connected to the bottom end of one of the magnetic cores, and the other wire rack is connected to the bottom end of the other magnetic core;

[0018] Two coils, one of which is wound on one of the wire racks, and the other of which is wound on the other wire rack.

[0019] As a further improved technical solution, the magnetic core is a Permalloy magnetic core.

[0020] As a further improved technical solution, the banknote verification magnetic head further includes:

[0021] The second magnetic isolation plate is arranged at the bottom ends of the two magnetic seats, and two sides of the second magnetic isolation plate are connected to the inner wall of the shielding shell.

[0022] As a further improved technical solution, the first magnetic isolation plate and the second magnetic isolation plate are both silicon steel plates.

[0023] As a further improved technical solution, the banknote verification magnetic head further includes:

[0024] A cover plate, arranged on a side of the shielding shell away from the opening;

[0025] A terminal is connected to the coil through the cover plate and the second magnetic isolation plate in sequence.

[0026] As a further improved technical solution, the length of the magnetic core unit is 11-12 mm.

[0027] As a further improved technical solution, the interval between two adjacent magnetic core units is 0.2 to 0.3 mm.

[0028] Technical Solution 2

[0029] A banknote detector is provided with the banknote detector magnetic head described in technical solution one.

[0030] Compared with the prior art, the beneficial effects of the utility model are:

[0031] The present application provides a currency verification magnetic head and a currency verification machine, wherein the currency verification magnetic head includes a shielding shell, a plurality of magnetic core units and a plurality of first magnetic isolation plates, one side of the shielding shell is provided with an opening arranged along the length direction of the shielding shell; a plurality of magnetic core units are arranged in the shielding shell at intervals along the length direction of the shielding shell, and one side of the magnetic core unit passes through the opening for reading the magnetic characteristic anti-counterfeiting signal on the banknote; a plurality of first magnetic isolation plates are located in the shielding shell and are arranged on both sides of the magnetic core unit. The present application achieves the purpose of reducing noise during the inspection of banknotes by installing first magnetic isolation plates on both sides of the magnetic core unit to block part of the electromagnetic field generated by the magnetic core unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of the magnetic banknote detector provided by the utility model;

[0033] Figure 2 It is a structural schematic diagram of the magnetic banknote verification head in a partial section;

[0034] Figure 3 for Figure 2 A local enlarged view of point A;

[0035] Figure 4 Schematic diagram of the connection between the middle magnetic plate and the gap plate.

[0036] The numbers in the figure are as follows: 1. Shielding shell; 2. Magnetic core unit; 201. Magnetic core; 202. Middle magnetic plate; 203. Gap plate; 204. Wire rack; 205. Coil; 206. First magnetic isolation plate; 207. Second magnetic isolation plate; 208. Terminal; 3. Magnetic base; 4. Cover plate. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0038] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0039] It should also be noted that the same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] Example 1

[0042] like Figures 1 to 3 As shown, Figure 1 It is a structural schematic diagram of the banknote verification magnetic head; Figure 2 It is a structural schematic diagram of the magnetic banknote verification head in a partial section; Figure 3 for Figure 2 A partial enlarged view of A. Specifically, this embodiment provides a currency verification magnetic head, including a shielding shell 1, 8 magnetic core units 2 and 16 first magnetic isolation plates 206, wherein the shielding shell 1 is a rectangular parallelepiped structure with a total length of 100 mm, a width of 11.8 mm, and a height of 15 mm, and one side of the shielding shell 1 is provided with openings arranged along the length direction of the shielding shell 1. Of course, it should be understood that the size of the shielding shell 1 can be flexibly set according to actual needs, and is not limited in this embodiment.

[0043] Two oppositely arranged magnetic seats 3 are fixedly connected to the inner wall of the shielding shell 1, and are specifically fastened by resin; the magnetic seats 3 are fixedly connected to the magnetic core unit 2, and are specifically fixedly connected by bolts. Of course, it should be understood that other fixing methods can also be selected according to actual needs, which is not limited in this embodiment.

[0044] The eight magnetic core units 2 are arranged in the shielding shell 1 at intervals along the length direction of the shielding shell 1, thereby forming eight detection channels, realizing the synchronous detection of the security lines distributed at different positions on the banknotes and the magnetic characteristic anti-counterfeiting signals on the magnetic ink. The effective detection length L of the eight magnetic core units 2 is: L = 11.6mm*8+0.25mm*7=94.55mm, so that it can read the magnetic characteristic anti-counterfeiting signals distributed on a variety of banknotes. The length of the magnetic core unit 2 is 11.6mm, and the interval between two adjacent magnetic core units 2 is 0.25mm. It should be noted that the side of the magnetic core unit 2 passing through the opening is the working end, and the length of the working end is 11.6mm, which is used to read the magnetic characteristic anti-counterfeiting signals on the banknotes.

[0045] Sixteen first magnetic isolation plates 206 are located inside the shielding shell 1 and are arranged in pairs on the eight magnetic core units 2, that is, one first magnetic isolation plate 206 is arranged on two opposite sides of each magnetic core unit 2. Therefore, when the magnetic core unit 2 reads the magnetic characteristic anti-counterfeiting signal on the banknote, the first magnetic isolation plate 206 isolates part of the electromagnetic field generated by the magnetic core unit 2, thereby achieving the purpose of noise reduction during the inspection of the banknote.

[0046] Combination Figure 4 As shown, Figure 4 Schematic diagram of the connection between the middle magnetic plate and the gap pieces. Specifically, each magnetic core unit 2 includes two magnetic cores 201, a middle magnetic plate 202, two gap pieces 203, two wire racks 204 and two coils 205, one of the magnetic cores 201 is fixedly connected to one of the magnetic seats 3, and the other magnetic core 201 is fixedly connected to the other magnetic seat 3. The upper ends of the two magnetic cores 201 are both sloped, so that the upper ends of the two relatively arranged magnetic cores 201 are combined to form a pointed shape. The tops of the two relatively arranged magnetic cores 201 serve as working ends, which pass through the opening and are flush with the outer surface of the shielding shell 1. The outer sides of the two magnetic cores 201 are fixedly connected with a first magnetic isolation plate 206 for isolating the electromagnetic field; the middle magnetic plate 202 is located at the bottom of the shielding shell 1. Between the two magnetic cores 201; one of the gap sheets 203 is located between the middle magnetic plate 202 and one of the magnetic cores 201, and the other gap sheet 203 is located between the middle magnetic plate 202 and the other magnetic core 201. The two gap sheets 203 of suitable size and the middle magnetic plate 202 form a sandwich structure, which is used for the banknote verification head to read the wavelength of the magnetic characteristic information on the banknote, and has high sensitivity; one of the wire racks 204 is connected to the bottom end of one of the magnetic cores 201, and the other wire rack 204 is connected to the bottom end of the other magnetic core 201; one of the coils 205 is coiled on one of the wire racks 204, and the other coil 205 is coiled on the other wire rack 204.

[0047] It should be noted that the magnetic core 201 is a Permalloy magnetic core, also known as an iron-nickel alloy magnetic core, which has a very high weak magnetic field permeability, so Permalloy becomes a good manufacturing material for the magnetic core 201. The wall thickness of the magnetic core 201 is 0.675 mm.

[0048] The second magnetic isolation plate 207 is also provided at the bottom of the two magnetic seats 3, and the two sides of the second magnetic isolation plate 207 are in contact with the inner wall of the shielding shell 1 to isolate the electromagnetic field propagating from the bottom of the magnetic core unit 2. It should be noted that the first magnetic isolation plate 206 and the second magnetic isolation plate 207 are both silicon steel plates. Since silicon steel plates have good magnetic isolation effects, silicon steel plates have become good manufacturing materials for the first magnetic isolation plates 206 and the second magnetic isolation plates 207. Of course, it should be understood that other plate structures with good magnetic isolation effects can also be selected as the manufacturing materials of the first magnetic isolation plates 206 and the second magnetic isolation plates 207, which is not limited in this embodiment.

[0049] A cover plate 4 is provided on the side of the shielding shell 1 away from the opening. The terminal 208 passes through the cover plate 4 and the second magnetic isolation plate 207 in sequence and is connected to the coil 205 for outputting the anti-counterfeiting signal of the magnetic characteristics on the banknote detected by the magnetic core unit 2.

[0050] Specifically, the working principle of the currency verification magnetic head provided in this embodiment is:

[0051] When the banknote verification magnetic head is working, the banknote passes through 8 detection channels. The magnetic ink on the banknote and the magnetic material in the security line can change the magnetic line density of the magnetic core 201, so that the magnetic line density of the detection channel changes, that is, the magnetic flux passing through the coil 205 changes, and an induced electromotive force is generated in the coil 205, and a corresponding voltage signal is output through the terminal 208. The detected eight-way signal is amplified by the banknote verification circuit and transmitted to the banknote detector to identify the authenticity of the detected banknote.

[0052] The first magnetic isolation plate 206 blocks part of the electromagnetic field of the magnetic core unit 2 when the banknote verification head is working, so as to reduce the noise generated when the banknote verification head reads the magnetic characteristic anti-counterfeiting signal on the banknote.

[0053] Specifically, the banknote verification magnetic head provided in this embodiment has the following beneficial effects:

[0054] (1) A first magnetic isolation plate 206 is installed on both sides of the magnetic core unit 2, and a second magnetic isolation plate 207 is installed at the bottom of the magnetic core unit 2 to block part of the electromagnetic field generated by the magnetic core unit 2, thereby achieving the purpose of reducing noise during the inspection of banknotes;

[0055] (2) Eight magnetic core units 2 are provided, which can read the distribution of magnetic core anti-counterfeiting characteristic signals of banknotes issued by different countries, so that the authenticity of banknotes issued by multiple countries can be identified, and the device has high versatility.

[0056] Example 2

[0057] This embodiment provides a banknote detector, which is provided with the banknote detector magnetic head in Example 1. The banknote detector magnetic head can block part of the electromagnetic field generated by the magnetic core unit 2, so as to achieve the purpose of noise reduction during the inspection of banknotes; at the same time, it can read the distribution of anti-counterfeiting characteristic signals of the magnetic cores of banknotes issued by different countries, so as to be compatible with the authenticity identification of banknotes issued by different countries, and has high versatility.

[0058] The banknote verification magnetic head and banknote verification machine provided by the present application, wherein the banknote verification magnetic head comprises a shielding shell 1, a plurality of magnetic core units 2 and a plurality of first magnetic isolation plates 206, one side of the shielding shell 1 is provided with an opening arranged along the length direction of the shielding shell 1; a plurality of magnetic core units 2 are arranged in the shielding shell 1 at intervals along the length direction of the shielding shell 1, and one side of the magnetic core unit 2 passes through the opening for reading the magnetic characteristic anti-counterfeiting signal on the banknote; a plurality of first magnetic isolation plates 206 are located in the shielding shell 1 and are arranged on both sides of the magnetic core unit 2. The present application achieves the purpose of reducing noise during the inspection of banknotes by installing the first magnetic isolation plates 206 on both sides of the magnetic core unit 2 to block part of the electromagnetic field generated by the magnetic core unit 2.

[0059] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the solutions disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not disclosed in the present solution. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present invention are indicated by the claims.

Claims

1. A currency verification magnetic head, comprising a shielding shell, one side of the shielding shell is provided with openings arranged along the length direction of the shielding shell; characterized in that: The banknote verification magnetic head also includes: A plurality of magnetic core units are arranged in the shielding shell at intervals along the length direction of the shielding shell, and one side of the magnetic core unit passes through the opening, so as to read the magnetic characteristic anti-counterfeiting signal on the banknote; A plurality of first magnetic isolation plates are located in the shielding shell and are arranged on both sides of the magnetic core unit; The banknote verification magnetic head also includes: The two magnetic seats are fixedly connected to opposite sides of the shielding shell through resin, and are fixedly connected to the magnetic core unit through bolts.

2. The magnetic banknote detector according to claim 1, characterized in that: The magnetic core unit comprises: Two magnetic cores, one of which is fixedly connected to one of the magnetic seats, and the other magnetic core is fixedly connected to the other magnetic seat; The middle magnetic plate is located between the two magnetic cores; Two gap sheets, one of which is located between the middle magnetic plate and one of the magnetic cores, and the other gap sheet is located between the middle magnetic plate and the other magnetic core; Two wire racks, one wire rack is connected to the bottom end of one of the magnetic cores, and the other wire rack is connected to the bottom end of the other magnetic core; Two coils, one of which is wound on one of the wire racks, and the other of which is wound on the other wire rack.

3. The magnetic banknote detector according to claim 2, characterized in that: The magnetic core is a Permalloy magnetic core.

4. The magnetic banknote verification head according to claim 2, characterized in that: The banknote verification magnetic head also includes: The second magnetic isolation plate is arranged at the bottom ends of the two magnetic seats, and two sides of the second magnetic isolation plate are connected to the inner wall of the shielding shell.

5. The magnetic banknote verification head according to claim 4, characterized in that: The first magnetic isolation plate and the second magnetic isolation plate are both silicon steel plates.

6. The magnetic banknote verification head according to claim 4, characterized in that: The banknote verification magnetic head also includes: A cover plate, arranged on a side of the shielding shell away from the opening; A terminal is connected to the coil through the cover plate and the second magnetic isolation plate in sequence.

7. The magnetic banknote verification head according to claim 1, characterized in that: The length of the magnetic core unit is 11-12 mm.

8. The magnetic banknote verification head according to claim 1, characterized in that: The interval between two adjacent magnetic core units is 0.2 to 0.3 mm.

9. A banknote detector, characterized in that: The banknote detector is provided with a banknote detector magnetic head as described in any one of claims 1 to 8.

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