Magnetic jammer and card reader
A magnetic jammer for a card reader and structured to generate a magnetic field for jamming illegal reading of magnetic data stored on a card may include a core including magnetic material; a coil wound around the core and structured to generate a jamming magnetic field; a case accommodating the core and the coil; and a resin sealant filling the inside of the case and covering the core and the coil. The core and the coil may be disposed apart from an inner face of the case such that the core and the coil do not come into contact with the inner face of the case. A portion of the resin sealant may be disposed between the core and the inner face of the case and between the coil and the inner face of the case.
1. A magnetic jammer for a card reader and structured to generate a magnetic field for jamming illegal reading of magnetic data stored on a card, the magnetic jammer comprising:
a core comprising magnetic material;
a coil wound around the core and structured to generate a jamming magnetic field;
a case accommodating the core and the coil; and
a resin sealant filling the inside of the case and covering the core and the coil, wherein,
the core and the coil are disposed apart from an inner face of the case such that the core and the coil do not come into contact with the inner face of the case, and
a portion of the resin sealant is disposed between the core and the inner face of the case and between the coil and the inner face of the case.
2. The magnetic jammer according to claim 1 , further comprising:
a circuit board electrically connected to the coil, at least a portion of the circuit board being disposed inside the case,
wherein the coil is fixed to the circuit board.
3. The magnetic jammer according to claim 2 , wherein the case comprises a circuit-board support supporting the circuit board.
4. The magnetic jammer according to claim 3 , further comprising:
a circuit board electrically connected to the coil, at least a portion of the circuit board being disposed inside the case,
wherein the circuit board covers the core and the coil from at least three directions.
5. The magnetic jammer according to claim 4 , wherein the circuit board comprises a rigid-flexible substrate comprising two rigid substrates between which the core and the coils are disposed and a flexible printed substrate connecting the two rigid substrates, and the circuit board covers the core and the coil from the three directions.
6. The magnetic jammer according to claim 4 , wherein,
the core comprises a plurality of separable core segments that comprise separate bodies integrated into a single unit.
7. The magnetic jammer according to claim 6 , wherein,
the core segments comprise:
a first core segment having a linear rod shape;
a second core segment having a linear rod shape and disposed parallel to the first core segment;
a third core segment having a linear rod shape and disposed parallel to the first core segment;
a fourth core segment having a linear rod shape and disposed parallel to the first core segment; and
a connecting core segment having a linear rod shape and being fixed to an end portion of the first core segment, an end portion of the second core segment, an end portion of the third core segment, and an end portion of the fourth core segment, and
the coil is wound around the first core segment, the second core segment, the third core segment, and the fourth core segment.
8. The magnetic jammer according to claim 3 , wherein,
the core comprises a plurality of separable core segments integrated into a single unit.
9. The magnetic jammer according to claim 8 , wherein,
the core segments comprise:
a first core segment having a linear rod shape;
a second core segment having a linear rod shape and disposed parallel to the first core segment;
a third core segment having a linear rod shape and disposed parallel to the first core segment;
a fourth core segment having a linear shape and disposed parallel to the first core segment; and
a connecting core segment having a linear rod shape and being fixed to an end portion of the first core segment, an end portion of the second core segment, an end portion of the third core segment, and an end portion of the fourth core segment, and
the coil is wound around the first core segment, the second core segment, the third core segment, and the fourth core segment.
10. The magnetic jammer according to claim 2 , further comprising:
a circuit board electrically connected to the coil, at least a portion of the circuit board being disposed inside the case,
wherein the circuit board covers the core and the coil from at least three directions.
11. The magnetic jammer according to claim 10 , wherein the circuit board comprises a rigid-flexible substrate comprising two rigid substrates between which the core and the coils are disposed and a flexible printed substrate connecting the two rigid substrates, and the circuit board covers the core and the coil from the three directions.
12. The magnetic jammer according to claim 10 , wherein the core comprises a plurality of separable core segments integrated into a single unit.
13. The magnetic jammer according to claim 10 , wherein,
the core segments comprise:
a first core segment having a linear rod shape;
a second core segment having a linear rod shape and disposed parallel to the first core segment;
a third core segment having a linear rod shape and disposed parallel to the first core segment;
a fourth core segment having a linear rod shape and disposed parallel to the first core segment; and
a connecting core segment having a linear rod shape and being fixed to an end portion of the first core segment, an end portion of the second core segment, an end portion of the third core segment, and an end portion of the fourth core segment, and
the coil is wound around the first core segment, the second core segment, the third core segment, and the fourth core segment.
14. The magnetic jammer according to claim 2 , wherein,
the core comprises a plurality of separable core segments that comprise separate bodies integrated into a single unit.
15. The magnetic jammer according to claim 14 , wherein,
the core segments comprise:
a first core segment having a linear rod shape;
a second core segment having a linear rod shape and disposed parallel to the first core segment;
a third core segment having a linear rod shape and disposed parallel to the first core segment;
a fourth core segment having a linear rod shape and disposed parallel to the first core segment; and
a connecting core segment having a linear rod shape and being fixed to an end portion of the first core segment, an end portion of the second core segment, an end portion of the third core segment, and an end portion of the fourth core segment, and
the coil is wound around the first core segment, the second core segment, the third core segment, and the fourth core segment.
16. The magnetic jammer according to claim 1 , further comprising:
a circuit board electrically connected to the coil, at least a portion of the circuit board being disposed inside the case,
wherein the circuit board covers the core and the coil from at least three directions.
17. The magnetic jammer according to claim 16 , wherein the circuit board comprises a rigid-flexible substrate comprising two rigid substrates between which the core and the coils are disposed and a flexible printed substrate connecting the two rigid substrates, and the circuit board covers the core and the coil from the three directions.
18. The magnetic jammer according to claim 16 , wherein,
the core comprises a plurality of separable core segments integrated into a single unit.
19. The magnetic jammer according to claim 18 , wherein,
the core segments comprise:
a first core segment having a linear rod shape;
a second core segment having a linear rod shape and disposed parallel to the first core segment;
a third core segment having a linear rod shape and disposed parallel to the first core segment;
a fourth core segment having a linear rod shape and disposed parallel to the first core segment; and
a connecting core segment having a linear rod shape and being fixed to an end portion of the first core segment, an end portion of the second core segment, an end portion of the third core segment, and an end portion of the fourth core segment, and
the coil is wound around the first core segment, the second core segment, the third core segment, and the fourth core segment.
20. The magnetic jammer according to claim 18 , wherein,
the core comprises a plurality of separable core segments that comprise separate bodies integrated into a single unit.
21. The magnetic jammer according to claim 20 , wherein,
the core segments comprise:
a first core segment having a linear rod shape;
a second core segment having a linear rod shape and disposed parallel to the first core segment;
a third core segment having a linear rod shape and disposed parallel to the first core segment;
a fourth core segment having a linear rod shape and disposed parallel to the first core segment; and
a connecting core segment having a linear rod shape and being fixed to an end portion of the first core segment, an end portion of the second core segment, an end portion of the third core segment, and an end portion of the fourth core segment, and
the coil is wound around the first core segment, the second core segment, the third core segment, and the fourth core segment.
22. A card reader for use with a card, the card reader comprising:
a magnetic jammer structured to generate a magnetic field for jamming illegal reading of magnetic data stored on the card, wherein,
the magnetic jammer comprises: a core comprising magnetic material; a coil wound around the core and structured to generate a jamming magnetic field; a case accommodating the core and the coil; and a resin sealant filling the inside of the case and covering the core and the coil,
the core and the coil are disposed apart from an inner face of the case such that the core and the coil do not come into contact with the inner face of the case, and
a portion of the resin sealant is disposed between the core and the inner face of the case and between the coil and the inner face of the case.