Anti-interference information reading magnetic head

Abstract

The utility model relates to the technical field of magnetic heads, in particular to an anti-interference information reading magnetic head which comprises a shell with an open lower end face, a mounting plate arranged in the lower portion of the shell, a magnetic head assembly arranged on the upper portion of the shell and located on the mounting plate, and a shielding bottom shell arranged on the lower portion of the shell and used for covering the opening in the lower portion of the shell. The shielding bottom shell is additionally arranged, the opening in the lower portion of the outer shell is covered with the plug, the outer shell and the shielding bottom shell form a closed protective shell, the information reading safety can be improved, external electromagnetic interference can be effectively reduced, and it is ensured that the data reading process is more stable and reliable.

Description

Technical Field

[0001] The present application relates to the field of magnetic head technology, and in particular to an anti-interference information reading magnetic head. Background Art

[0002] Information reading devices use magnetic heads to read information. A magnetic head is a component that uses magnetism to read data from magnetic media. Card reader heads and banknote detector heads are the most commonly used types of magnetic heads on the market today. Furthermore, magnetic card heads are widely used in various card reading devices, including POS card readers and ATMs.

[0003] Currently, a Chinese patent publication numbered CN 108108640 A discloses a magnetic card head, comprising a housing and a magnetic head assembly housed within the housing. The magnetic head assembly comprises one or more magnetic core groups, a clamp, and a retaining spring. The magnetic core groups are secured within a slot formed by the clamp, and the retaining spring is used to clamp two relatively mounted clamps. The upper end surface of the housing is an R-arc surface, wherein the thickness of the middle portion of the R-arc surface is greater than the thickness of the edge portion, the R-arc radius of the outer surface is smaller than the R-arc radius of the inner surface, and the R-arc edge of the outer surface is lower than the R-arc edge of the inner surface.

[0004] However, the bottom of the shell in the prior art is an open structure, which is easily affected by electromagnetic interference and has low safety, so further improvement is needed. Utility Model Content

[0005] In order to reduce the possibility of electromagnetic interference to the magnetic head assembly in the housing, the present application provides an interference-proof information reading magnetic head.

[0006] The anti-interference information reading head provided in this application adopts the following technical solution:

[0007] An anti-interference information reading magnetic head comprises a shell with an opening at the lower end surface, a mounting plate built into the lower part of the shell, a magnetic head assembly arranged at the upper part of the shell and located on the mounting plate, and a shielding bottom shell arranged at the lower part of the shell to cover the lower opening of the shell.

[0008] By adopting the above technical solution, a shielding bottom shell is added, and the opening at the bottom of the shell is sealed. The shell and the shielding bottom shell form a relatively closed protective shell, which can improve the security of information reading, effectively reduce external electromagnetic interference, and ensure that the data reading process is more stable and reliable.

[0009] Preferably, the shielding bottom shell is a copper shell, a Permalloy shell, or a stainless steel shell.

[0010] By adopting the above technical solution, the shielding bottom shell is made of copper shell, Permalloy shell or stainless steel shell, so that the shielding bottom shell has good electromagnetic shielding performance, further improving the information security and anti-electromagnetic interference capability of the magnetic head.

[0011] Preferably, the shielding bottom shell is welded and fixed to the lower part of the outer shell.

[0012] Preferably, the shielding bottom shell is detachably connected to the outer shell via threaded fasteners.

[0013] By adopting the above technical solution, the shielding bottom shell is threadedly locked to the outer shell by threaded fasteners, thereby achieving a stable connection between the shielding bottom shell and the outer shell, which is convenient for installation and disassembly.

[0014] Preferably, the shielding bottom shell includes a shielding bottom plate and several shielding side plates fixedly connected to the outer edge of the shielding bottom plate. A limiting hole is provided on the outer wall of the shell. The shielding side plate is slidably connected to the limiting rod. The shielding side plate is provided with an elastic part that forces the limiting rod to slide and be inserted into the limiting hole under normal circumstances.

[0015] By adopting the above technical solution, a limiting hole is opened on the outer wall of the shell, and the design of the limiting rod and elastic part makes it possible to easily assemble the shielding bottom shell to the shell, ensuring that the shielding bottom shell is firmly connected while facilitating disassembly and maintenance.

[0016] Preferably, the end of the limiting rod away from the limiting hole is fixedly connected to a force plate, and the elastic member is a spring, one end of the spring is fixedly connected to the outer wall of the shielding side plate, and the other end of the spring is fixedly connected to the force plate.

[0017] By adopting the above technical solution, it is convenient for an operator to apply a force through the force application plate to make the limiting rod slide out of the limiting hole, thereby facilitating the disassembly and assembly of the shielding bottom shell.

[0018] Preferably, the end portion of the limiting rod close to the limiting hole has a guide surface for the lower end surface of the shell to abut against, thereby forcing the limiting rod to slide toward the outer side of the shielding side plate.

[0019] By adopting the above technical solution, a guide surface is provided at the end of the limit rod near the limit hole. When the lower end surface of the shell contacts the guide surface, the limit rod can slide smoothly toward the outside of the shielding side plate. At this time, the elastic part undergoes elastic deformation and has elastic potential energy. After the shielding bottom shell cover is in place, the elastic part forces the limit rod to slide and be inserted into the limit hole, which facilitates the rapid installation of the shielding bottom shell and improves the installation efficiency and convenience.

[0020] In summary, the present invention has the following beneficial effects:

[0021] 1. Add a shielding bottom shell and seal the lower opening of the shell. The shell and the shielding bottom shell form a relatively closed protective shell, which can improve the security of information reading, effectively reduce external electromagnetic interference, and ensure that the data reading process is more stable and reliable;

[0022] 2. The shielding bottom shell is made of copper shell or Permalloy shell, which makes the shielding bottom shell have good electromagnetic shielding performance, further improving the information security and anti-electromagnetic interference ability of the magnetic head;

[0023] 3. A limit hole is provided on the outer wall of the shell, and the design of the limit rod and elastic part enables the shielding bottom shell to be easily assembled to the shell, ensuring a stable connection of the shielding bottom shell while facilitating disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of an anti-interference information reading head in Example 1;

[0025] Figure 2 is a schematic diagram of the internal structure of the housing in Example 1;

[0026] Figure 3 Schematic diagram of the connection structure between the housing and the shielding side plate in Example 2.

[0027] In the figure, 1. outer shell; 11. terminal block; 12. resin; 13. circuit board; 14. wiring trough; 15. limiting hole; 2. shielding bottom shell; 21. shielding bottom plate; 22. shielding side plate; 23. notch; 24. limiting rod; 25. spring; 26. force plate; 27. guide surface. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-3 This application is described in further detail.

[0029] Example 1:

[0030] The present application discloses an anti-interference information reading magnetic head, referring to Figure 1 、 Figure 2 The present invention comprises a housing 1 with an open lower end surface, a mounting plate built into the lower portion of the housing 1, a magnetic head assembly disposed on the upper portion of the housing 1 and positioned on the mounting plate, and a shielding bottom shell 2 disposed at the lower portion of the housing 1 to cover the lower opening of the housing 1. In this embodiment, the housing 1 is a permalloy shell. The connection structure of the housing 1, the mounting plate, and the magnetic head assembly is conventional and will not be described in detail here.

[0031] The inner cavity of the housing 1 is potted with resin 12, so that the mounting plate is embedded in the resin 12. The terminal blocks 11 on the mounting plate are exposed on the surface of the resin 12. The housing 1 contains a circuit board 13 located below the resin 12. The circuit board 13 is electrically connected to the lower ends of the terminal blocks 11. A wiring groove 14 is defined in the lower portion of one side of the outer wall of the housing 1. The connecting wires on the circuit board 13 pass through the wiring groove 14 and exit the housing 1. In this embodiment, the circuit board 13 and the terminal blocks 11 are fixedly connected.

[0032] The shielding bottom shell 2 is made of copper, permalloy, or stainless steel. In this embodiment, permalloy is used. The shielding bottom shell 2 comprises a shielding base plate 21 and several shielding side plates 22 fixedly connected to the outer edges of the shielding base plate 21. In this embodiment, the inner side walls of the shielding side plates 22 are welded to the outer wall of the housing 1. In other embodiments, the shielding side plates 22 can be removably connected to the outer wall of the housing 1 using threaded fasteners, specifically screws. The shielding side plates 22, corresponding to the wiring trough 14, have notches 23 to allow the connecting wires on the circuit board 13 to pass through.

[0033] The implementation principle of the embodiment of the present application is: adding a shielding bottom shell 2, and sealing the lower opening of the outer shell 1. The outer shell 1 and the shielding bottom shell 2 form a relatively closed protective shell, which can improve the security of information reading, effectively reduce external electromagnetic interference, and ensure that the data reading process is more stable and reliable.

[0034] Example 2:

[0035] The difference from Example 1 is that, referring to Figure 3 The outer wall of the housing 1 defines a limit hole 15. A limit rod 24 is slidably inserted through the shielding side panel 22. The end of the limit rod 24, away from the limit hole 15, is fixedly connected to a force application plate 26. An elastic member is disposed between the shielding side panel 22 and the force application plate 26, which normally forces the limit rod 24 to slide into the limit hole 15. Specifically, the elastic member is a spring 25 that sleeves over the limit rod 24. One end of the spring 25 is fixedly connected to the outer wall of the shielding side panel 22, and the other end of the spring 25 is fixedly connected to the force application plate 26. The end of the limit rod 24 near the limit hole 15 has a guide surface 27 that the lower end surface of the housing 1 abuts, thereby forcing the limit rod 24 to slide toward the outside of the shielding side panel 22.

[0036] The implementation principle of the embodiment of the present application is: when the shielding bottom shell 2 is installed, and when the lower end surface of the shell 1 contacts the guide surface 27 at the end of the limit rod 24, the limit rod 24 can slide toward the outside of the shielding side plate 22. At this time, the spring 25 undergoes elastic deformation and has elastic potential energy. After the shielding bottom shell 2 is covered in place, the shielding bottom plate 21 abuts against the lower end surface of the shell 1 and the limit rod 24 and the limit hole 15 correspond in position. The spring 25 forces the limit rod 24 to slide and be inserted into the limit hole 15, thereby realizing rapid fixed installation of the shielding bottom shell 2 and the shell 1. When the shielding bottom shell 2 needs to be disassembled, an outward force is applied to the force plate 26, so that the limit rod 24 slides out of the limit hole 15, unlocking the sliding restriction on the shielding bottom shell 2, and the shielding bottom shell 2 can be pulled out.

[0037] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An anti-interference information reading magnetic head, characterized in that: The invention comprises a housing (1) with an opening at the lower end surface, a mounting plate built into the lower portion of the housing (1), a magnetic head assembly arranged at the upper portion of the housing (1) and located on the mounting plate, and a shielding bottom shell (2) arranged at the lower portion of the housing (1) to cover the lower opening of the housing (1).

2. The anti-interference information reading magnetic head according to claim 1, characterized in that: The shielding bottom shell (2) is a copper shell, a Permalloy shell, or a stainless steel shell.

3. The anti-interference information reading head according to claim 1, characterized in that: The shielding bottom shell (2) is welded and fixed to the lower part of the outer shell (1).

4. The anti-interference information reading magnetic head according to claim 1, characterized in that: The shielding bottom shell (2) is detachably connected to the outer shell (1) via threaded fasteners.

5. The anti-interference information reading magnetic head according to claim 1, characterized in that: The shielding bottom shell (2) includes a shielding bottom plate (21) and a plurality of shielding side plates (22) fixedly connected to the outer edge of the shielding bottom plate (21); a limiting hole (15) is provided on the outer side wall of the shell (1); the shielding side plates (22) are slidably connected to the limiting rod (24); and the shielding side plates (22) are provided with elastic members that force the limiting rod (24) to slide and be inserted into the limiting hole (15) under normal conditions.

6. The anti-interference information reading magnetic head according to claim 5, characterized in that: The end of the limiting rod (24) away from the limiting hole (15) is fixedly connected to a force plate (26), and the elastic member is a spring (25), one end of the spring (25) is fixedly connected to the outer wall of the shielding side plate (22), and the other end of the spring (25) is fixedly connected to the force plate (26).

7. The anti-interference information reading magnetic head according to claim 5, characterized in that: The end of the limiting rod (24) close to the limiting hole (15) has a guide surface (27) for the lower end surface of the housing (1) to abut against, thereby forcing the limiting rod (24) to slide toward the outside of the shielding side plate (22).

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