Information reading magnetic head

Abstract

The utility model relates to the technical field of magnetic heads, in particular to an information reading magnetic head which comprises a shell with an open lower end face, a magnetic head module and potting resin, the magnetic head module is arranged in the shell, an iron core of the magnetic head module is arranged on the upper surface of the shell in a penetrating mode, and the magnetic head module and the shell are fixed through the potting resin. An inner cavity, located below the potting resin, of the shell is a circuit board cavity, the lower portion of a wiring terminal of the magnetic head module extends to the circuit board cavity, the shell is provided with a base plate and a circuit board body which are arranged in the circuit board cavity, the base plate is provided with a through hole for the wiring terminal to penetrate through, and the upper end face of the base plate abuts against the inner wall of the top of the circuit board cavity. The upper end face of the circuit board body abuts against the lower end face of the base plate, and the wiring terminal is electrically connected to the circuit board body. The circuit board has the effect of improving the connection stability of the circuit board.

Description

Technical Field

[0001] The present application relates to the field of magnetic head technology, and in particular to an 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] At present, an information reading device in the prior art includes a base plate, a shielding shell, which is buckled on the base plate; a magnetic head assembly, which is passed through the shielding shell and arranged above the shielding shell, and the magnetic head assembly includes an iron core clamped on the base plate and a potting resin that fixes the iron core to the shielding shell, and multiple iron cores are arranged along the length direction of the shielding shell; a clamp for clamping and fixing the iron core, which is clamped on the outside of the iron core, and the outer surface abuts against the inner wall of the shielding shell; a wiring terminal, including a frame passed through the base plate and a connecting terminal passed through the frame, and the connecting terminal is exposed from the lower end surface of the potting resin; a plurality of grounding plates are provided, which are respectively arranged around the base plate and connected to the base plate, and the height of the grounding plate plug extending out of the base plate is greater than the height of the connecting terminal exposed outside the base plate.

[0004] The inner cavity below the resin surface of the shielding shell is a circuit board cavity, in which a circuit board is placed. The circuit board is used to electrically connect to the connecting terminals. In the assembly of the information reading head, when the height dimensions of the circuit board cavity of the shielding shell tree are different and the thickness dimensions of the circuit board are the same, a gap is easily generated between the circuit board and part of the circuit board cavity of the shielding shell, resulting in low connection stability of the circuit board, and therefore needs further improvement. Utility Model Content

[0005] In order to improve the connection stability of a circuit board, the present application provides an information reading head.

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

[0007] An information reading magnetic head includes a shell with an open lower end surface, a magnetic head module, and a potting resin. The magnetic head module is built into the shell, the iron core of the magnetic head module is passed through the upper surface of the shell, and the potting resin fixes the magnetic head module and the shell. The inner cavity of the shell below the potting resin is a circuit board chamber. The lower part of the connection terminal of the magnetic head module extends into the circuit board chamber. The shell is provided with a pad built into the circuit board chamber and a circuit board body. The pad is provided with a through hole for the connection terminal to pass through. The upper end surface of the pad is in contact with the top inner wall of the circuit board chamber, and the upper end surface of the circuit board body is in contact with the lower end surface of the pad. The connection terminal is electrically connected to the circuit board body.

[0008] By adopting the above technical solution, by adding a pad in the circuit board cavity and selecting pads of different thicknesses according to the height size of the circuit board cavity, support compensation is provided for the circuit board body, thereby effectively reducing the gap between the circuit board body and the circuit board cavity when the height specification of the circuit board cavity does not match the thickness specification of the circuit board, improving the connection stability of the circuit board and improving the reliability of the connection of the product.

[0009] Preferably, the backing plate is provided with a mass-reducing hole.

[0010] By adopting the above technical solution and opening the mass-reducing holes on the pad, the weight of the pad can be reduced, thereby reducing the overall weight of the information reading head, while reducing the amount of material used and reducing costs.

[0011] Preferably, a first threaded hole is opened on the upper end surface of the pad, and a plurality of first threaded holes are provided. The pad is provided with a top screw threadedly connected to the first threaded hole, and the nut end surface of the top screw is against the top inner wall of the circuit board cavity.

[0012] By adopting the above technical solution, the feed amount of the top screw is adjusted by rotating the top screw, thereby adjusting the length of the top screw exposed above the pad, thereby adjusting the position of the pad in the circuit board cavity, providing support compensation for the circuit board body, and improving the versatility of the pad.

[0013] Preferably, the pad includes an upper plate and a lower plate, and an adjustment component for adjusting the distance between the upper plate and the lower plate is provided between the upper plate and the lower plate. The upper end surface of the upper plate abuts against the top inner wall of the circuit board cavity, and the upper end surface of the circuit board body abuts against the lower end surface of the lower plate.

[0014] By adopting the above technical solution, the distance between the upper plate and the lower plate can be adjusted by adjusting the assembly according to the height of the circuit board cavity, thereby adjusting the thickness of the pad and improving the versatility of the pad.

[0015] Preferably, the adjustment assembly includes a spring arranged between the upper plate and the lower plate and an adjustment bolt threadedly connected to the lower end surface of the upper plate, the nut end surface of the adjustment bolt abuts against the upper end surface of the lower plate, and the spring forces the upper plate and the lower plate to slide toward each other under normal conditions.

[0016] By adopting the above technical solution, the thickness of the pad can be flexibly adjusted by rotating the adjustment bolt, effectively reducing the gap between the circuit board body and the circuit board cavity, improving the connection stability of the circuit board and improving the reliability of the product connection.

[0017] Preferably, an upper mounting countersunk hole is provided on the lower end surface of the upper plate, and a lower mounting countersunk hole is provided on the upper end surface of the lower plate. The upper end of the spring is fixedly connected to the upper mounting countersunk hole, and the lower end of the spring is fixedly connected to the lower mounting countersunk hole.

[0018] By adopting the above technical solution, by opening an upper mounting countersunk hole on the lower end surface of the upper plate and a lower mounting countersunk hole on the upper end surface of the lower plate, the two ends of the spring can be fixedly connected to the upper mounting countersunk hole and the lower mounting countersunk hole respectively, thereby achieving a stable connection between the upper plate and the lower plate.

[0019] Preferably, a second threaded hole is provided on the lower end surface of the upper plate, and the adjusting bolt is threadedly connected to the second threaded hole. A rotating hole is provided through the lower end surface of the lower plate, and the adjusting bolt is a hexagon socket bolt. The inner diameter of the rotating hole is larger than the inner diameter of the hexagonal unlocking groove of the hexagon socket bolt and smaller than the outer diameter of the nut of the hexagon socket bolt.

[0020] By adopting the above technical solution, it is convenient for the hexagonal wrench to pass through the rotating hole and be inserted into the hexagonal unlocking groove to rotate the adjusting bolt.

[0021] In summary, the present invention has the following beneficial effects:

[0022] 1. By adding a pad in the circuit board cavity and selecting pads of different thicknesses according to the height of the circuit board cavity, support and compensation are provided for the circuit board body, thereby effectively reducing the gap between the circuit board body and the circuit board cavity, improving the connection stability of the circuit board and improving the reliability of the connection of the product;

[0023] 2. By rotating the top screw, the feed amount of the top screw is adjusted, thereby adjusting the length of the top screw exposed above the pad, thereby adjusting the position of the pad in the circuit board cavity, providing support compensation for the circuit board body, and improving the versatility of the pad;

[0024] 3. By rotating the adjusting bolt, the thickness of the pad can be flexibly adjusted, effectively reducing the gap between the circuit board body and the circuit board cavity, improving the connection stability of the circuit board and improving the reliability of the product connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of an information reading magnetic head in Example 1;

[0026] Figure 2 is a schematic diagram of the bottom structure of the housing in Example 1;

[0027] Figure 3 is a schematic structural diagram of the circuit board body and the backing plate in Example 1;

[0028] Figure 4 is a structural diagram of the pad in Example 2;

[0029] Figure 5 It is a structural schematic diagram of the pad in Example 3.

[0030] In the figure, 1. outer shell; 11. circuit board chamber; 2. head module; 21. terminal block; 3. potting resin; 4. pad; 41. through hole; 42. mass reduction hole; 43. first threaded hole; 44. top screw; 45. upper plate; 451. upper mounting countersunk hole; 452. second threaded hole; 46. lower plate; 461. lower mounting countersunk hole; 462. rotating hole; 5. circuit board body; 6. adjustment assembly; 61. spring; 62. adjustment bolt; 63. hexagonal unlocking slot. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-5 This application is described in further detail.

[0032] Example 1:

[0033] The present application embodiment discloses an information reading magnetic head, referring to Figure 1 , including a shell 1 with an open lower end surface, a head module 2 and a potting resin 3. The head module 2 is built into the shell 1, and the iron core of the head module 2 is passed through the upper surface of the shell 1. The potting resin 3 fixes the head module 2 and the shell 1. The structure of the head module 2 is existing technology and will not be described here.

[0034] Reference Figure 2 、 Figure 3The inner cavity of the housing 1 located below the potting resin 3 is the circuit board chamber 11, and the lower portion of the terminal 21 of the magnetic head module 2 extends into the circuit board chamber 11. The housing 1 is provided with a pad 4 and a circuit board body 5 built into the circuit board chamber 11. A mass-reducing hole 42 is provided in the middle of the pad 4. The pad 4 is provided with a through hole 41 for the terminal 21 to pass through. There are multiple through holes 41 distributed around the circumference of the mass-reducing hole 42. The number of through holes 41 corresponds to the number of the terminal 21. The upper end face of the pad 4 is in contact with the top inner wall of the circuit board chamber 11. The upper end face of the circuit board body 5 is in contact with the lower end face of the pad 4. The terminal 21 is electrically connected to the circuit board body 5. In this embodiment, the terminal 21 and the circuit board body 5 are fixed by plug-in welding.

[0035] The implementation principle of an information reading head in an embodiment of the present application is as follows: by adding a pad 4 in the circuit board cavity 11, pads 4 of different thicknesses are selected according to the height size of the circuit board cavity 11 to provide support compensation for the circuit board body 5, thereby effectively reducing the gap between the circuit board body 5 and the circuit board cavity 11 when the height specification of the circuit board cavity 11 does not match the thickness specification of the circuit board, thereby improving the connection stability of the circuit board and improving the reliability of the connection of the product.

[0036] Example 2:

[0037] The difference from Example 1 is that, referring to Figure 4 The upper end surface of the backing plate 4 is provided with a first threaded hole 43, of which there are multiple. The backing plate 4 is provided with a top screw 44 that is threadedly connected to the first threaded hole 43. The nut end of the top screw 44 abuts against the top inner wall of the circuit board chamber 11. By rotating the top screw 44, the feed amount of the top screw 44 is adjusted, thereby adjusting the length of the top screw 44 exposed above the backing plate 4, thereby adjusting the position of the backing plate 4 within the circuit board chamber 11, providing support and compensation for the circuit board body 5, and improving the versatility of the backing plate 4.

[0038] Example 3:

[0039] The difference from Example 1 is that, referring to Figure 5The backing plate 4 includes an upper plate 45 and a lower plate 46. An adjustment assembly 6 is provided between the upper plate 45 and the lower plate 46 to adjust the distance between the two plates. The upper end surface of the upper plate 45 abuts against the top inner wall of the circuit board chamber 11, and the upper end surface of the circuit board body 5 abuts against the lower end surface of the lower plate 46. The adjustment assembly 6 includes a spring 61 fixedly connected between the upper plate 45 and the lower plate 46 and an adjustment bolt 62 threadedly connected to the lower end surface of the upper plate 45. The lower end surface of the upper plate 45 defines an upper mounting countersunk hole 451, and the upper end surface of the lower plate 46 defines a lower mounting countersunk hole 461. The upper end of the spring 61 is fixedly connected to the upper mounting countersunk hole 451, and the lower end of the spring 61 is fixedly connected to the lower mounting countersunk hole 461. Under normal conditions, the spring 61 forces the upper plate 45 and the lower plate 46 to slide toward each other.

[0040] The adjusting bolt 62 is a hexagon socket head bolt. A second threaded hole 452 is defined in the lower end surface of the upper plate 45, into which the adjusting bolt 62 is threadedly connected. A rotating hole 462 is defined through the lower end surface of the lower plate 46. The inner diameter of the rotating hole 462 is larger than the inner diameter of the hexagonal unlocking slot 63 of the hexagon socket head bolt and smaller than the outer diameter of the hexagon socket head bolt's nut. The end face of the nut of the adjusting bolt 62 abuts against the upper end surface of the lower plate 46. To adjust the spacing between the upper and lower plates 45 and 46, an hexagonal wrench is inserted through the rotating hole 462 and into the hexagonal unlocking slot 63 to rotate the adjusting bolt 62, thereby adjusting the thickness of the backing plate 4.

[0041] 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 information reading magnetic head, characterized in that: The invention comprises a shell (1) with an open lower end surface, a magnetic head module (2) and a potting resin (3), wherein the magnetic head module (2) is built into the shell (1), the iron core of the magnetic head module (2) is passed through the upper surface of the shell (1), the potting resin (3) fixes the magnetic head module (2) and the shell (1), the inner cavity of the shell (1) below the potting resin (3) is a circuit board chamber (11), the lower part of the terminal (21) of the magnetic head module (2) extends to the circuit board chamber (11), the shell (1) is provided with a pad (4) built into the circuit board chamber (11) and a circuit board body (5), the pad (4) is provided with a through hole (41) for the terminal (21) to pass through, the upper end surface of the pad (4) is in contact with the top inner wall of the circuit board chamber (11), the upper end surface of the circuit board body (5) is in contact with the lower end surface of the pad (4), and the terminal (21) is electrically connected to the circuit board body (5).

2. The information reading head according to claim 1, wherein: The backing plate (4) of the backing plate (4) is provided with a mass-reducing hole (42).

3. The information reading magnetic head according to claim 1, wherein: The upper end surface of the backing plate (4) is provided with a first threaded hole (43), a plurality of first threaded holes (43) are provided, and the backing plate (4) is provided with a top screw (44) threadedly connected to the first threaded hole (43), and the nut end surface of the top screw (44) is in contact with the top inner wall of the circuit board chamber (11).

4. The information reading head according to claim 1, wherein: The pad (4) comprises an upper plate (45) and a lower plate (46), an adjustment component (6) for adjusting the distance between the upper plate (45) and the lower plate (46) is provided between the upper plate (45) and the lower plate (46), the upper end surface of the upper plate (45) abuts against the top inner wall of the circuit board chamber (11), and the upper end surface of the circuit board body (5) abuts against the lower end surface of the lower plate (46).

5. The information reading magnetic head according to claim 4, characterized in that: The adjustment assembly (6) includes a spring (61) arranged between the upper plate (45) and the lower plate (46) and an adjustment bolt (62) threadedly connected to the lower end surface of the upper plate (45). The nut end surface of the adjustment bolt (62) abuts against the upper end surface of the lower plate (46). Under normal conditions, the spring (61) forces the upper plate (45) and the lower plate (46) to slide toward each other.

6. The information reading magnetic head according to claim 5, characterized in that: An upper mounting countersunk hole (451) is provided on the lower end surface of the upper plate (45), and a lower mounting countersunk hole (461) is provided on the upper end surface of the lower plate (46). The upper end of the spring (61) is fixedly connected to the upper mounting countersunk hole (451), and the lower end of the spring (61) is fixedly connected to the lower mounting countersunk hole (461).

7. The information reading magnetic head according to claim 5, characterized in that: The lower end surface of the upper plate (45) is provided with a second threaded hole (452), and the adjusting bolt (62) is threadedly connected to the second threaded hole (452). The lower end surface of the lower plate (46) is provided with a rotating hole (462) through it. The adjusting bolt (62) is a hexagon socket bolt, and the inner diameter of the rotating hole (462) is larger than the inner diameter of the hexagonal unlocking groove (63) of the hexagon socket bolt and smaller than the outer diameter of the nut of the hexagon socket bolt.

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