CN213987519U - Magnetic head assembly with waterproof function, card reader and card swiping equipment - Google Patents

Abstract

The utility model relates to a equipment technical field of punching the card mainly discloses a magnetic head subassembly and card reader and equipment of punching the card with waterproof function. The magnetic head assembly comprises a clamping rail seat and a magnetic head arranged on the clamping rail seat, wherein a clamping groove and a clamping rail seat window arranged on the clamping groove are arranged on the clamping rail seat, a magnetic head body and a support connected with the magnetic head body are arranged on the magnetic head, the magnetic head body is movably arranged in the clamping rail seat window, a gap is formed between the magnetic head and the clamping rail seat, and a sealing water blocking structure which is used for sealing the gap and blocking the environment outside the clamping groove is arranged on the clamping rail seat. The magnetic head assembly seals a gap between the magnetic head and the clamping rail seat through a sealing water blocking structure arranged between the magnetic head and the clamping rail seat window, so that water or vapor of the external environment is prevented from entering the inside of the card swiping equipment through the gap.

Description

Magnetic head assembly with waterproof function, card reader and card swiping equipment

[ technical field ] A method for producing a semiconductor device

The utility model relates to a equipment technical field of punching the card especially relates to a magnetic head subassembly and card reader and equipment of punching the card with waterproof function.

[ background of the invention ]

At present, the basic structure of the prior magnetic head assembly is shown in fig. 1 and fig. 2, and comprises the following structures: the clamping rail seat is provided with a clamping groove, a clamping rail seat window and a bracket fixing hole; the magnetic head comprises a magnetic head body arranged on the magnetic head, an FPC (flexible printed circuit) connected with the magnetic head body and a bracket for connecting the magnetic head body to the rail clamping seat; and the screw is used for fixing the bracket on the bracket fixing hole.

And aligning the support hole of the magnetic head with the support fixing hole on the rail clamping seat, simultaneously placing the magnetic head body into the rail clamping seat window, and twisting the screw into the support fixing hole through the support hole to complete the assembly of the magnetic head assembly. When the magnetic card is used, the magnetic card is inserted into the card swiping slot, the magnetic card is contacted with the ground surface of the magnetic head body, the magnetic head body is pushed inwards by the magnetic card and moves a little in the direction away from the card swiping slot, as shown in the direction indicated by the downward arrow in the attached drawing 3; when the magnetic card is drawn out of the card slot, the magnetic head body rebounds to the initial position under the rebounding action of the bracket, as shown in the direction indicated by the upward arrow in fig. 3; the magnetic head body repeats the above movement in a cycle with the card swiping operation.

As shown in fig. 3, the outside of the card swiping slot and the dotted line is the outside of the magnetic head assembly, and the inside of the card swiping slot side wall and the dotted line is the inside of the magnetic head assembly, so that when the card is swiped, in order to avoid the situation that the magnetic head body touches the card rail seat when being pushed out by a magnetic card to influence the card swiping performance, the existing magnetic head assembly leaves a sufficient gap between the magnetic head body and the window of the card rail seat, as shown in fig. 4. However, the magnetic head assembly is not waterproof, and because a gap exists between the magnetic head body and the clamping rail seat window, the inside and the outside of the magnetic head assembly are communicated with each other, and outside water or water vapor can enter the inside of the card swiping equipment through the gap to influence the performance of a machine. Such head assemblies are therefore not applicable in environments where water resistance is required, such as outdoors, often humid environments, and the like. The application of the existing card swiping component has certain limitation.

[ Utility model ] content

The utility model aims at providing a magnetic head subassembly with waterproof function to solve current magnetic head subassembly because there is the gap between magnetic head and the card rail seat window, lead to water or steam to get into the problem of the inside performance that influences the equipment of punching the card of equipment of punching the card through the gap.

In order to realize the above-mentioned purpose, the utility model provides a magnetic head subassembly with waterproof function, include the card rail seat and locate magnetic head on the card rail seat, be equipped with on the card rail seat and brush the draw-in groove and locate brush the card rail seat window on the draw-in groove lateral wall, be equipped with the magnetic head body on the magnetic head and with this body coupling of magnetic head is to support on the card rail seat, the elastic deformation of support magnetic head reciprocating motion when can satisfying the card of punching, the activity of magnetic head body is located in the card rail seat window, the magnetic head with form the gap between the card rail seat, be equipped with on the card rail seat with the magnetic head with gap between the card rail seat is sealed, and with the sealed water-blocking structure that separates is hindered to the outside environment of the card groove of punching.

Preferably, the sealing water-blocking structure is arranged between the magnetic head body and the clamping rail seat window to prevent water or water vapor from entering the inside of the card swiping equipment through a gap between the magnetic head and the clamping rail seat to influence the performance of the card swiping equipment.

Preferably, the sealing water-blocking structure is an elastic sealing diaphragm arranged between the magnetic head body and the clamping rail seat window, the gap between the magnetic head and the clamping rail seat is sealed through the sealing diaphragm, the inside of the card swiping equipment is separated from the outside environment of the card swiping groove, and water or water vapor is prevented from entering the inside of the card swiping equipment to influence the card swiping performance of the card swiping equipment. The sealing diaphragm is a silica gel diaphragm made of silica gel.

Preferably, the sealing diaphragm comprises a magnetic head combination part, a card swiping movement part connected with the magnetic head combination part, and an injection molding connection part, wherein one side of the injection molding connection part is connected with the card swiping movement part, and the other end of the injection molding connection part is connected with the window of the card rail seat; the magnetic head combining part, the card swiping motion part and the injection molding connecting part can be bonded into a whole through adhesive or directly integrated into a whole, so that a better sealing effect is achieved. The magnetic head body comprises a magnetic head shell, a magnetic sheet, a magnetic shell and a coil, wherein the magnetic sheet, the magnetic shell and the coil are arranged in the magnetic head shell, the magnetic head combination part is tightly wrapped on the peripheral side of the magnetic head body, namely the peripheral side of the magnetic head shell, and extends for a certain length along the peripheral side of the magnetic head body to the direction of the clamping rail seat window, and the length does not exceed the width of the magnetic head body so as to form an annular surface structure surrounding the peripheral side of the magnetic head body and improve the sealing effect.

Preferably, the bracket is provided with a bent welding edge matched with the shape of the magnetic head body, and the bent welding edge is used for enabling the bracket to be in contact with the magnetic head shell and enabling the bracket and the magnetic head shell to be connected into a whole through laser welding. The magnetic head joint part extends towards the bending welding edge and is tightly attached to the surface of the bending welding edge so as to improve the sealing effect. The magnetic head joint part extends along the direction of the bent welding edge towards the peripheral side surface of the magnetic head body to form an integral annular surface structure, a step is formed at the transition position of the bent welding edge towards the peripheral side surface of the magnetic head body, the magnetic head joint part is tightly attached to the bent welding edge and the peripheral side surface of the magnetic head body along the step, and due to the flexibility of the sealing diaphragm made of silica gel, the sealing diaphragm can be tightly attached along the step between the magnetic head shell and the bent welding edge to achieve full coverage, so that a gap is avoided, the sealing diaphragm cannot fall off from the magnetic head body, and meanwhile, water and water vapor are prevented from passing through the sealing diaphragm. The part where the magnetic head connecting part and the card swiping motion part are connected is perpendicular to the part extending along the peripheral side surface direction of the magnetic head body.

Preferably, the card swiping motion part is wavy, very thin and soft, has elasticity, and is convenient for the magnetic head body to move together with the magnetic head body when in contact with the card, and the damage to the mechanical strength and the toughness of the sealing diaphragm is reduced as much as possible.

Preferably, a circle of dovetail groove is formed in the peripheral side of the window of the card rail seat, one end, far away from the card swiping motion part, of the injection molding connecting part is connected with the dovetail groove in a tight mode in an integrated structure in a secondary injection molding mode, so that a sealing effect is better achieved, and water or water vapor is prevented from entering the card swiping equipment. Of course, the injection-molded connecting part can be sealed and adhered in the dovetail groove through glue.

Preferably, the sealing water-blocking structure is arranged on one side of the magnetic head back to the rail clamping seat window.

Preferably, the sealing water-blocking structure comprises a waterproof double-sided adhesive tape and a waterproof cover connected with the waterproof double-sided adhesive tape, the magnetic head and the gap between the clamping rail seat windows are sealed through the waterproof double-sided adhesive tape and the waterproof cover and are separated from the external environment outside the card swiping groove, so that the effect of preventing water or water vapor from entering the inside of the card swiping equipment is achieved, and the card swiping performance of the card swiping equipment is prevented from being influenced.

Preferably, the waterproof cover is provided with a bulge matched with the outline of the magnetic head, and the periphery of the waterproof cover is planar; the waterproof double faced adhesive tape and the waterproof cover are consistent in contour all around, the middle of the waterproof double faced adhesive tape is provided with a through cavity for the magnetic head to penetrate through, the front side and the back side of the waterproof double faced adhesive tape are provided with back adhesive, and the waterproof cover is in sealing connection with the clamping rail seat through the waterproof double faced adhesive tape.

Preferably, the waterproof cover is provided with a positioning hole, and the clamping rail seat is provided with a waterproof cover positioning column, so that the waterproof cover can be rapidly connected to the clamping rail seat through the positioning column and the positioning hole in matched guiding and positioning when being connected to the clamping rail seat.

Compared with the prior art, its beneficial effect lies in:

the utility model discloses magnetic head subassembly with waterproof function, through the magnetic head with the sealed block water structure that sets up between the card rail seat window, with the gap seal between magnetic head and the card rail seat, make and separate between the inside and the external environment of equipment of punching the card, prevent that the water or the steam of external environment from getting into inside the equipment of punching the card through this gap, avoid influencing the performance of punching the card of equipment of punching the card, the life of magnetic head subassembly has been prolonged greatly, enlarge the range of application of magnetic head subassembly, make the magnetic head subassembly of this application can work for a long time under the environment that has waterproof requirement. Obviously, the card reader and the card swiping equipment comprising the magnetic head component with the waterproof function of the utility model also have the advantages of the magnetic head component.

[ description of the drawings ]

Fig. 1 is a structural view of a conventional magnetic head assembly.

FIG. 2 is an exploded view of a prior art magnetic head assembly construction.

FIG. 3 is a top view of a prior art magnetic head assembly.

Fig. 4 is a sectional view taken along a section line a-a in fig. 3.

Fig. 5 is a structural view of a head assembly according to embodiment 1 of the present invention.

Fig. 6 is a first exploded view of a magnetic head assembly according to embodiment 1 of the present invention.

Fig. 7 is an exploded view of a magnetic head assembly according to embodiment 1 of the present invention.

Fig. 8 is a plan view of a magnetic head assembly according to embodiment 1 of the present invention.

Fig. 9 is a sectional view taken along the section line B-B in fig. 8.

Fig. 10 is a side view of a magnetic head assembly according to embodiment 1 of the present invention.

Fig. 11 is a sectional view taken along a section line C-C in fig. 10.

Fig. 12 is a structural view of a magnetic head assembly according to embodiment 2 of the present invention.

Fig. 13 is an exploded view of a magnetic head assembly according to embodiment 2 of the present invention.

Fig. 14 is a sectional view taken along the sectional line D-D in fig. 12.

Fig. 15 is an enlarged view of a partial structure E in fig. 9.

Fig. 16 is an enlarged view of a partial structure F in fig. 11.

In the figure, 1, a rail clamping seat; 11. brushing a clamping groove; 12. a rail clamping seat window; 13. a bracket fixing hole; 14. a dovetail groove; 15. sealing the diaphragm; 151. a magnetic head joint part; 152. a card swiping motion part; 153. injection molding the connecting part; 16. a waterproof cover positioning column; 17. a head case;

2. a magnetic head; 21. a magnetic head body; 210. a magnetic head body lapping surface; 22. a support; 221. bending the welding edge; 23. a bracket hole; 24. FPC (flexible wiring board); 25. a screw; 26. a gap between the magnetic head body and the rail clamping seat window; 27. a waterproof cover; 271. a protrusion; 272. positioning holes; 28. waterproof double faced adhesive tape; 281. passing through a cavity; 29. a space between the waterproof cover and the magnetic head.

[ detailed description ] embodiments

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Example 1: as shown in fig. 5 to 11, and fig. 15 and 16, this embodiment provides a magnetic head assembly with a waterproof function, including a clamping rail seat and a magnetic head arranged on the clamping rail seat, a card slot and a clamping rail seat window arranged on the side wall of the card slot are arranged on the clamping rail seat, a magnetic head body and a support connected to the magnetic head body on the clamping rail seat are arranged on the magnetic head, the elastic deformation of the support can satisfy the reciprocating motion of the magnetic head when the card is swiped, the magnetic head body is movably arranged in the clamping rail seat window, one end of the magnetic head body is connected with an FPC so as to be electrically connected with the inside of a card swiping device through the FPC, a gap is formed between the magnetic head and the clamping rail seat, and a sealing water blocking structure for sealing the gap between the magnetic head and the clamping rail seat and blocking the environment outside the card slot is arranged on the clamping rail seat.

Specifically, in this embodiment, the sealed water-blocking structure is provided with an elastic sealing diaphragm between the magnetic head body and the rail clamping seat window, and the sealing diaphragm is a silica gel diaphragm made of silica gel. The gap between the magnetic head body and the clamping rail seat window (namely the gap between the magnetic head and the clamping rail seat) is sealed through the sealing diaphragm, the environment inside the card swiping equipment is separated from the environment outside the card swiping groove, water or water vapor is prevented from entering the inside of the card swiping equipment through the gap to influence the performance of the card swiping equipment, and the problem that the performance of the card swiping equipment is influenced by the fact that the water or the water vapor enters the inside of the card swiping equipment due to the gap between the magnetic head and the clamping rail seat window in the background art is solved.

As shown in fig. 6 and 7, the sealing diaphragm includes a magnetic head combining portion, a card swiping moving portion connected to the magnetic head combining portion, and an injection molding connecting portion having one side connected to the card swiping moving portion and the other end connected to the rail seat window, the magnetic head combining portion is used for being connected to the magnetic head body and the bracket in a sealing manner, and the injection molding connecting portion is used for being connected to the rail seat window. The magnetic head body comprises a magnetic head shell, a magnetic sheet, a magnetic shell and a coil, wherein the magnetic sheet, the magnetic shell and the coil are arranged in the magnetic head shell, and the magnetic head combining part is tightly wrapped on the peripheral side of the magnetic head body, namely the peripheral side of the magnetic head shell. As an optimized technical scheme, the magnetic head combining part extends for a certain length along the peripheral side of the magnetic head body to the direction of the clamping rail seat window to form an annular surface structure surrounding the peripheral side of the magnetic head body so as to improve the sealing effect, and the length does not exceed the width of the magnetic head body.

As an optimized technical scheme, the bracket is provided with a bending welding edge matched with the shape of the magnetic head body and used for enabling the bracket to be in contact with the magnetic head shell, and the bracket and the magnetic head shell are connected into a whole through laser welding. The magnetic head joint part extends towards the bending welding edge and is tightly attached to the surface of the bending welding edge so as to improve the sealing effect. The magnetic head joint part extends along the direction of the bent welding edge towards the peripheral side surface of the magnetic head body to form an integral annular surface structure, a step is formed at the transition position of the bent welding edge towards the peripheral side surface of the magnetic head body, the magnetic head joint part is tightly attached to the bent welding edge and the peripheral side surface of the magnetic head body along the step, and due to the flexibility of the sealing diaphragm made of silica gel, the sealing diaphragm can be tightly attached to the magnetic head shell along the step between the bent welding edges to achieve full coverage, so that a gap is avoided, the sealing diaphragm is not easy to fall off from the magnetic head body, and meanwhile, water and water vapor are prevented from passing through, and the sealing effect is achieved. The part where the magnetic head connecting part and the card swiping motion part are connected is perpendicular to the part extending along the peripheral side surface direction of the magnetic head body.

Particularly, the card swiping motion part is wavy and has elasticity, the wavy arc shape is convenient for the magnetic head body to move together with the magnetic head body when the magnetic head body is in contact with the card, and the damage to the mechanical strength and the toughness of the sealing diaphragm is reduced as much as possible.

In this embodiment, the magnetic head combination part, the card swiping movement part and the injection molding connection part are directly and integrally formed, so that a better sealing effect is achieved. The clamping rail seat is characterized in that the periphery of the window of the clamping rail seat is provided with a circle of dovetail groove corresponding to the injection molding connecting part, and the dovetail groove and the injection molding connecting part are molded into an integrated structure in a secondary injection molding mode to achieve a better sealing effect and prevent water or water vapor from entering the inside of the card swiping equipment.

The assembly and the working process of the magnetic head assembly with the waterproof function of the embodiment are as follows: and the magnetic head shell of the magnetic head body is firstly welded with the bent welding edge of the bracket, and then the FPC is welded on the magnetic head body through a welding procedure to be assembled into a magnetic head finished product. And tightly connecting the injection molding connecting part in the dovetail groove through secondary injection molding, so that the sealing diaphragm and the clamping rail seat form an integrally connected part. Then the magnetic head body is arranged in a magnetic head combining part of a sealing diaphragm made of silica gel, the card swiping moving part is connected with the magnetic head combining part, and the magnetic head combining part is tightly attached to the magnetic head shell and the bent welding edge after the magnetic head body is plugged into the magnetic head combining part. And finally aligning the support holes with the support fixing holes of the rail clamping seats, and fixing the support on the rail clamping seats through screws to finish the assembly of the magnetic head assembly.

When punching the card, the magnetic card contacts the magnetic head and grinds the face, and the magnetic head body is pushed out slightly by the magnetic card, and the direction of keeping away from the card swiping slot removes a little, and at this moment, the magnetic head joint portion of sealed diaphragm closely pastes the magnetic head shell, and under its traction, the card swiping motion portion of sealed diaphragm also removes towards the moving direction of magnetic head body, because the card swiping motion portion is very soft and frivolous, it can not have the pulling force to the magnetic head body, can not obstruct the motion of magnetic head body, can not exert an influence to the card swiping. In the card swiping process, the injection molding connecting part is always fixed in the dovetail groove of the card rail seat and cannot move. When the magnetic card was taken out the card swiping groove, the magnetic head body kick-backed to initial position under the resilience effect of support, and simultaneously, the card swiping motion part and the magnetic head joint part of sealed diaphragm also followed the magnetic head body and kick-backed. The magnetic head body repeats the above movement in a cycle with the card swiping operation. Therefore, the sealing diaphragm forms a waterproof barrier between the magnetic head body and the clamping rail seat window, the sealing diaphragm can move along with the magnetic head body without falling off, the waterproof barrier is formed all the time in the card swiping process, meanwhile, the card swiping performance cannot be influenced, and the technical problem in the background technology is solved.

Example 2: the present embodiment is substantially the same as the basic structure of embodiment 1, and the difference is that the sealing water-blocking structure of the present embodiment is disposed on a side of the magnetic head opposite to the card rail seat window, as shown in fig. 12 to 14, the sealing water-blocking structure includes a waterproof double-sided adhesive and a waterproof cover connected to the waterproof double-sided adhesive, a gap between the magnetic head and the card rail seat window is sealed by the waterproof double-sided adhesive and the waterproof cover, and is separated from an external environment outside the card swiping slot, so as to prevent water or water vapor from entering the inside of the card swiping device, and avoid affecting the card swiping performance of the card swiping device.

Specifically, the waterproof cover is provided with a protrusion matched with the outline of the magnetic head, the periphery of the waterproof cover is planar, namely the protrusion of the waterproof cover faces the inside of the card swiping equipment to form a space enough for accommodating the magnetic head, and the peripheral regions of the waterproof cover except the protrusion are planar so as to facilitate the tight contact of the vertical side wall of the card rail seat; the waterproof double faced adhesive tape and the waterproof cover are consistent in contour all around, a through cavity for the magnetic head to pass through is arranged in the middle of the waterproof double faced adhesive tape, back adhesive tapes are arranged on the front and back surfaces of the waterproof double faced adhesive tape, and the waterproof cover is bonded on the rail clamping seat through the waterproof double faced adhesive tape.

Preferably, the waterproof cover is provided with a positioning hole, and the clamping rail seat is provided with a waterproof cover positioning column corresponding to the positioning hole, so that the waterproof cover can be quickly connected to the clamping rail seat through the matching guiding and positioning of the positioning column and the positioning hole when being connected to the clamping rail seat.

When the magnetic head assembly is used, one side of the waterproof double-sided adhesive tape is aligned with the outline of the waterproof cover and is attached to the peripheral plane of the waterproof cover, then the waterproof cover together with the waterproof double-sided adhesive tape is attached to the side wall of the clamping rail seat, the positioning hole of the waterproof cover is aligned to the waterproof cover positioning column on the clamping rail seat, the waterproof double-sided adhesive tape is tightly attached to the clamping rail seat, the waterproof double-sided adhesive tape together with the waterproof cover covers the whole magnetic head, and water vapor are prevented from entering the magnetic head assembly. Referring to fig. 14, the FPC is adhered and tightly pressed on the surface of the rail seat by the waterproof double-sided tape, the magnetic head is tightly attached to the surface of the sidewall of the rail seat around the waterproof double-sided tape, and the bottom plane of the waterproof cover is adhered to the other surface of the waterproof double-sided tape, so as to cover the entire magnetic head. Meanwhile, the area of the waterproof cover corresponding to the magnetic head body is outwards (actually towards the inside of the card swiping equipment, and outwards in the attached drawings 12 to 14), and enough space is reserved between the waterproof cover and the magnetic head, so that the magnetic head body does not touch the waterproof cover when the card swiping is carried out. The scheme is that a waterproof barrier is formed on one side of the magnetic head back to the rail clamping seat window to achieve the waterproof function.

In the above embodiment, the magnetic head is mounted on only one side of the rail clamping seat, but the magnetic head can be mounted on both sides for convenience of use. The utility model discloses a magnetic head with waterproof function can be applied to card reader or equipment of punching the card. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims (10)

1. Magnetic head subassembly with waterproof function, including card rail seat with locate the magnetic head on the card rail seat, its characterized in that: be equipped with on the card rail seat and punch the draw-in groove and locate card rail seat window on the draw-in groove of punching the card, be equipped with the magnetic head body on the magnetic head and incite somebody to action the magnetic head body is connected to support on the card rail seat, the activity of magnetic head body is located in the card rail seat window, the magnetic head with form the gap between the card rail seat, be equipped with on the card rail seat with the gap is sealed, and with the sealed structure of blocking water that separates is hindered to the outside environment of the card groove of punching the card.

2. The head assembly with waterproof function according to claim 1, wherein: the sealing water-blocking structure is arranged between the magnetic head body and the rail clamping seat window.

3. The head assembly with waterproof function according to claim 2, wherein: the sealing water-blocking structure is a sealing diaphragm arranged between the magnetic head body and the rail clamping seat window.

4. The head assembly with waterproof function according to claim 3, wherein: the sealing diaphragm comprises a magnetic head combination part, a card swiping movement part connected with the magnetic head combination part and an injection molding connection part, wherein one side of the injection molding connection part is connected with the card swiping movement part, and the other side of the injection molding connection part is connected with the clamping rail seat window; the magnetic head combining part is tightly wrapped on the peripheral side of the magnetic head body and extends to the direction of the clamping rail seat window along the peripheral side of the magnetic head body.

5. The head assembly with waterproof function according to claim 4, wherein: the magnetic head joint part extends towards the bending welding edge and is tightly attached to the surface of the bending welding edge.

6. The head assembly with waterproof function according to claim 4, wherein: the card swiping motion part is wave-shaped; and a circle of dovetail groove is formed on the peripheral side of the window of the clamping rail seat, and one end of the injection molding connecting part, which is far away from the card swiping motion part, is tightly connected with the dovetail groove.

7. The head assembly with waterproof function according to claim 1, wherein: the sealing water-blocking structure is arranged on one side of the magnetic head back to the rail clamping seat window.

8. The head assembly with waterproof function according to claim 7, wherein: the sealing water-blocking structure comprises a waterproof double-sided adhesive and a waterproof cover connected with the waterproof double-sided adhesive; the waterproof cover is provided with a bulge matched with the outline of the magnetic head, and the periphery of the waterproof cover is planar; the waterproof double-sided adhesive tape and the waterproof cover are consistent in peripheral outline, a through cavity for the magnetic head to pass through is arranged in the middle, back adhesives are arranged on the front side and the back side of the waterproof double-sided adhesive tape, and the waterproof cover is bonded on the rail clamping seat in a sealing mode through the waterproof double-sided adhesive tape; the waterproof cover is provided with a positioning hole, and the clamping rail seat is provided with a waterproof cover positioning column corresponding to the positioning hole.

9. Card reader, its characterized in that: a magnetic head assembly having a waterproof function comprising any one of claims 1 to 8.

10. Equipment of punching card, its characterized in that: a magnetic head assembly having a waterproof function comprising any one of claims 1 to 8.

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