CN215833979U - Magnetic head with high-temperature protection - Google Patents
Magnetic head with high-temperature protection Download PDFInfo
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- CN215833979U CN215833979U CN202121127176.5U CN202121127176U CN215833979U CN 215833979 U CN215833979 U CN 215833979U CN 202121127176 U CN202121127176 U CN 202121127176U CN 215833979 U CN215833979 U CN 215833979U
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- temperature
- magnetic head
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Abstract
The invention relates to the field of magnetic heads, in particular to a high-temperature protection magnetic head which comprises a shell, wherein a support is fixed in the shell, a coil is fixed in the support, one end of the coil is fixed with a pin I, the other end of the coil is respectively connected with one end of a fixed value resistor and one end of a thermistor through connecting wires, and the other ends of the fixed value resistor and the thermistor are both fixed with a pin II. The coil is connected with the fixed value resistor in series and is connected with the fixed value resistor in parallel through the thermistor, the thermistor is a negative temperature coefficient thermistor, when the temperature rises, the resistance value of the thermistor is reduced, the partial pressure of the thermistor and the position of the fixed value resistor is reduced, the partial pressure of the position of the coil is increased, when the temperature is too high, the resistance value of the coil is increased, through increasing the partial pressure of the position of the coil, the current passing through the coil is unchanged, even the current is increased, the magnetic field of the coil cannot be reduced due to the rise of the temperature, and the sensitivity of detecting the bank notes by the magnetic head can be effectively ensured.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of magnetic heads, in particular to a magnetic head with high-temperature protection.
[ background of the invention ]
A banknote validator is a machine that verifies the authenticity of banknotes and counts the number of banknotes. Due to the huge cash circulation scale and the heavy cash processing work of the bank cashier counter, the cash counter becomes an indispensable device, the counting and counterfeit identification are integrated, the counterfeit money manufacturing level is higher and higher along with the development of printing technology, copying technology and electronic scanning technology, and the counterfeit identification performance of the cash counter must be continuously improved. The banknote counting machines are classified into horizontal type banknote counting machines and vertical type banknote counting machines according to different movement tracks of banknotes. The false distinguishing means generally comprises three modes of fluorescence recognition, magnetic analysis and infrared penetration.
However, when the banknote detector is used in a high-temperature environment, the environment temperature is high, the resistance of the coil is increased, the current is decreased, the magnetic field formed by the coil is decreased, the sensitivity of the magnetic head is reduced, and when a banknote passes through the magnetic head, the magnetic head cannot detect the magnetic strip on the banknote due to the decrease of the magnetic field.
The invention is provided for overcoming the defects of the prior art.
[ summary of the invention ]
It is an object of the present invention to overcome the above-mentioned disadvantages of the prior art and to provide a magnetic head with high temperature protection.
The invention can be realized by the following technical scheme:
the invention discloses a high-temperature protection magnetic head which comprises a shell, wherein a support is fixed in the shell, a coil is fixed in the support, one end of the coil is fixed with a pin I, the other end of the coil is respectively connected with one end of a fixed value resistor and one end of a thermistor through connecting wires, and the other ends of the fixed value resistor and the thermistor are both fixed with a pin II. The coil is connected with the fixed value resistor in series and is connected with the fixed value resistor in parallel through the thermistor, the thermistor is a negative temperature coefficient thermistor, when the temperature rises, the resistance value of the thermistor is reduced, the partial pressure of the thermistor and the position of the fixed value resistor is reduced, the partial pressure of the position of the coil is increased, when the temperature is too high, the resistance value of the coil is increased, through increasing the partial pressure of the position of the coil, the current passing through the coil is unchanged, even the current is increased, the magnetic field of the coil cannot be reduced due to the rise of the temperature, and the sensitivity of detecting the bank notes by the magnetic head can be effectively ensured.
Compared with the prior art, the invention has the following advantages:
when the temperature is too high, the resistance value of the coil is increased, the current passing through the coil is unchanged or even increased by increasing the partial pressure of the position of the coil, the magnetic field of the coil cannot be reduced due to the rise of the temperature, and the sensitivity of the magnetic head for detecting the paper money can be effectively ensured.
[ description of the drawings ]
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:
FIG. 1 is a first angular configuration of the present invention;
FIG. 2 is a circuit diagram of the present invention;
in the figure: 1. a housing; 2. a support; 3. a coil; 4. a pin I; 5. a connecting wire; 6. a constant value resistor; 7. a thermistor; 8. a pin II;
[ detailed description ] embodiments
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings:
as shown in fig. 1 to 2, the invention discloses a magnetic head with high temperature protection, which comprises a shell 1, wherein a support 2 is fixed inside the shell 1, a coil 3 is fixed in the support 2, one end of the coil 3 is fixed with a pin i 4, the other end of the coil 3 is respectively connected with one end of a fixed resistor 6 and one end of a thermistor 7 through a connecting wire 5, and the other ends of the fixed resistor 6 and the thermistor 7 are fixed with a pin ii 8. Connect coil 3 and fixed value resistance 6 in series to connect in parallel through thermistor 7 and fixed value resistance 6, thermistor 7 is negative temperature coefficient thermistor 7, when the temperature rose, thermistor 7 resistance dropped, the partial pressure in thermistor 7 and fixed value resistance 6 position reduced, the partial pressure in coil 3 position increased, when the temperature was too high, coil 3 resistance increased, through increasing the partial pressure in coil 3 position, can realize the unchangeable even current increase of electric current through coil 3, coil 3's magnetic field can not diminish because of the temperature rose, can effectively guarantee the sensitivity that the magnetic head detected the bank note.
The above description is only a preferred embodiment of the present invention, and it should be noted that a person skilled in the art can make various changes, modifications, substitutions and alterations to the embodiments without departing from the technical principles of the present invention, and such changes, modifications, substitutions and alterations should also be regarded as the protection scope of the present invention.
Claims (1)
1. A high temperature protected magnetic head comprising a housing, characterized by: the support is fixed in the shell, a coil is fixed in the support, a pin I is fixed at one end of the coil, the other end of the coil is connected with one end of a fixed value resistor and one end of a thermistor respectively through a connecting wire, and the other ends of the fixed value resistor and the thermistor are fixed with a pin II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121127176.5U CN215833979U (en) | 2021-05-25 | 2021-05-25 | Magnetic head with high-temperature protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121127176.5U CN215833979U (en) | 2021-05-25 | 2021-05-25 | Magnetic head with high-temperature protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215833979U true CN215833979U (en) | 2022-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121127176.5U Active CN215833979U (en) | 2021-05-25 | 2021-05-25 | Magnetic head with high-temperature protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215833979U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345155A (en) * | 2021-05-25 | 2021-09-03 | 全南群英达电子有限公司 | Magnetic head with high-temperature protection |
-
2021
- 2021-05-25 CN CN202121127176.5U patent/CN215833979U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345155A (en) * | 2021-05-25 | 2021-09-03 | 全南群英达电子有限公司 | Magnetic head with high-temperature protection |
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