CN212675574U - Pole piece for grounding fingerprint module and fingerprint device - Google Patents
Pole piece for grounding fingerprint module and fingerprint device Download PDFInfo
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- CN212675574U CN212675574U CN202021828661.0U CN202021828661U CN212675574U CN 212675574 U CN212675574 U CN 212675574U CN 202021828661 U CN202021828661 U CN 202021828661U CN 212675574 U CN212675574 U CN 212675574U
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- fingerprint module
- pole piece
- circuit board
- fingerprint
- external circuit
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Abstract
The utility model discloses a pole piece and fingerprint device for fingerprint module ground connection, the pole piece includes: the fingerprint module is arranged between the fingerprint module and the external circuit board and comprises a square frame and two bending surfaces extending from the side edges of the square frame; the square frame comprises a plurality of contact points or surfaces and two edges for connecting the contact points or surfaces; the contact points or the surfaces are respectively contacted with a plurality of grounding copper foil frames of the fingerprint module; the two edges are in contact with the fingerprint module to support the fingerprint module; the bending surface is connected with the external circuit board. The utility model discloses a pole piece realizes being connected of fingerprint module and external circuit board, has satisfied fingerprint module's ground connection demand, has guaranteed the normal operating of fingerprint module function.
Description
Technical Field
The utility model relates to a fingerprint module technical field, in particular to a pole piece and fingerprint device for fingerprint module ground connection.
Background
The radio frequency fingerprint module utilizes the biological radio frequency fingerprint identification technology, and transmits a trace radio frequency signal through the sensor, and the trace radio frequency signal penetrates through the epidermal layer of the finger to control and measure the texture of the inner layer, so as to obtain the optimal fingerprint image. The radio frequency fingerprint module has strong anti-fake fingerprint capability, and the radio frequency identification principle only reacts to human genuine leather skin, thereby fundamentally avoiding the problem of artificial fingerprints, and the radio frequency fingerprint module is widely applied to fingerprint verification at present. Currently, in order to meet various customer requirements and reduce costs, some fingerprint modules are made as a part of an injection molded part of the housing. However, current injection molding often only includes upper portion in order to reduce the outward appearance piece and moulds plastics shell and lower part and mould plastics two structures of shell, including only upper portion mould plastics shell and lower part when moulding plastics shell two structures, fingerprint module and external circuit board are parted, do not have the contact surface, this just can't let fingerprint module ground connection, can't guarantee the normal operating of fingerprint module function.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome the not enough of prior art, provide a pole piece and fingerprint device for fingerprint module ground connection, the utility model discloses a pole piece realizes being connected of fingerprint module and external circuit board, has satisfied fingerprint module's ground connection demand, has guaranteed the normal operating of fingerprint module function.
The utility model adopts the following technical scheme:
on one hand, the pole piece for grounding the fingerprint module is arranged between the fingerprint module and the external circuit board and comprises a square frame and two bending surfaces extending from the side edges of the square frame; the square frame comprises a plurality of contact points or surfaces and two edges for connecting the contact points or surfaces; the contact points or the surfaces are respectively contacted with a plurality of grounding copper foil frames of the fingerprint module; the two edges are in contact with the fingerprint module to support the fingerprint module; the bending surface is connected with the external circuit board.
Preferably, the pole piece is made of brass and nickel plating materials.
Preferably, the contact surface of the pole piece and the fingerprint module is not more than the grounding copper foil frame of the fingerprint module.
Preferably, the square frame is provided with four contact points or surfaces corresponding to the grounding copper foil frame on the fingerprint module.
Preferably, the bending surface is square and a first circular hole is formed in the middle of the bending surface.
Preferably, the bending surface is connected with the external circuit board through a connecting piece so as to be in contact with a copper foil of the circuit board; the connector comprises a screw.
On the other hand, the fingerprint device comprises an injection molding shell, a fingerprint module and an external circuit board, wherein the fingerprint module and the external circuit board are arranged in the injection molding shell; the injection molding shell comprises an upper injection molding shell and a lower injection molding shell; the external circuit board is connected with the lower injection molding shell; the fingerprint module is connected with the upper injection molding shell.
Preferably, the upper injection-molded shell and the lower injection-molded shell are connected by a snap.
Preferably, the number of the grounding copper foil frames on the fingerprint module is four; and a second circular hole matched with the first circular hole is formed in the external circuit board.
Preferably, the pole piece is arranged above an external circuit board and is locked with the lower injection molding shell through a screw; the fingerprint module is adhered to the upper injection molding shell through a back adhesive, and after the upper injection molding shell is connected with the lower injection molding shell, a contact point or a surface on the pole piece is in contact with a grounding copper foil frame on the fingerprint module.
Compared with the prior art, the beneficial effects of the utility model are as follows:
(1) the utility model realizes the connection between the fingerprint module and the external circuit board through the pole piece, meets the grounding requirement of the fingerprint module, and ensures the normal operation of the function of the fingerprint module;
(2) the pole piece of the utility model adopts brass nickel plating material and is provided with four contact points or surfaces, which can ensure good grounding of the fingerprint module;
(3) the utility model discloses a pole piece with fingerprint module's contact surface does not exceed fingerprint module's ground connection copper foil frame can avoid fingerprint module's components and parts, ensures that the circuit can not the short circuit, can guarantee the good ground connection performance of fingerprint module again, ensures that fingerprint module normally works.
The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention can be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following description lists the embodiments of the present invention.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Fig. 1 is an exploded view of a fingerprint device according to an embodiment of the present invention;
fig. 2 is an overall schematic view of a fingerprint device according to an embodiment of the present invention;
fig. 3 is a schematic view of a contact surface of a pole piece and a fingerprint module according to an embodiment of the present invention;
fig. 4 is a schematic view of a contact surface between a pole piece and an external circuit board according to an embodiment of the present invention;
fig. 5 is a schematic view illustrating a pole piece connected to a screw according to an embodiment of the present invention;
fig. 6 is a schematic diagram of an external circuit board according to an embodiment of the present invention;
fig. 7 is a schematic diagram of the connection between the pole piece and the external circuit board according to the embodiment of the present invention;
fig. 8 is a schematic diagram of a fingerprint module according to an embodiment of the present invention;
fig. 9 is a schematic diagram of the pole piece connected to the fingerprint module according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the fingerprint device of the present invention includes an injection molding housing, and a fingerprint module 20, a pole piece 30 and an external circuit board 40 disposed inside the injection molding housing; the injection molded housing comprises an upper injection molded housing 10 and a lower injection molded housing 50; the external circuit board 40 is connected with the lower injection molding shell 50; the fingerprint module 20 is connected with the upper injection-molded housing 10.
Specifically, the upper injection-molded housing 10 and the lower injection-molded housing 50 are connected by a snap. The pole piece 30 is arranged above the external circuit board 40 and is locked with the lower injection molding shell 50 through a screw 60; the fingerprint module 20 is bonded with the upper injection molding shell 10 through back glue, and after the upper injection molding shell 10 is connected with the lower injection molding shell 50, a contact point or a surface 301 on the pole piece 30 can be propped against a grounding copper foil frame 201 on the fingerprint module 20, so that the grounding function is realized.
Further, referring to fig. 3 and 9, the utility model relates to a pole piece for fingerprint module ground connection sets up between fingerprint module 20 and external circuit board 40, wherein fig. 3 does pole piece 30 with the face of fingerprint module 20 contact, fig. 4 does pole piece 30 with the face of external circuit board 40 contact. Specifically, the pole piece 30 includes a square frame and two bending surfaces 303 extending from the sides of the square frame; the square frame comprises a plurality of contact points or surfaces 301 and two edges 302 for connecting the contact points or surfaces 301; the contact points or surfaces 301 are respectively in contact with the grounding copper foil frames 201 of the fingerprint module 20; the two edges 302 contact the fingerprint module 20 to support the fingerprint module 20; the bending surface 303 is connected to the copper foil 402 on the external circuit board 40.
Further, the pole piece 30 is made of brass and nickel plating. Four contact points or surfaces 301 are arranged on the square frame, and four grounding copper foil frames 201 are arranged on the fingerprint module 20. Each of the contact points or surfaces 301 is in contact with one of the grounded copper foil frames 201.
The shape of the pole piece 30 is designed to have four contact points or surfaces 301, which aim to ensure that the four contact points of the pole piece 30 are in contact with the four grounding copper foil frames 201 of the fingerprint module 20, and the grounding can be ensured to be good through multi-point contact.
Further, the size and tolerance of the pole piece 30 are designed to ensure that the contact surface of the pole piece 30 and the fingerprint module 20 cannot exceed the grounding copper foil frame 201 of the fingerprint module 20 during the assembly process, so as to avoid short circuit of the circuit; and two edges of the pole piece 30 connecting the four contacts or faces are used for supporting the fingerprint module 20, so that the fingerprint module 20 can be pressed repeatedly.
Further, in order to connect the external circuit board 40 and the pole piece 30, a first circular hole 304 is disposed in the middle of each of the bending surfaces 303. Similarly, two second circular holes 401 are disposed at corresponding positions of the external circuit board 40. The screw 60 passes through the first circular hole 304 and the second circular hole 401 to connect the external circuit board 40 and the pole piece 30, and finally the external circuit board 40 and the pole piece 30 are locked on the lower injection molding shell 50. After the external circuit board 40 is connected to the pole piece 30, the pole piece 30 can contact with the copper foil 402 on the external circuit board 40, so as to connect the external circuit board 40 and the pole piece 30.
The above-mentioned be the utility model discloses a concrete implementation way, nevertheless the utility model discloses a design concept is not limited to this, and the ordinary use of this design is right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.
Claims (10)
1. A pole piece for grounding a fingerprint module is arranged between the fingerprint module and an external circuit board and comprises a square frame and two bending surfaces extending from the side edges of the square frame; the square frame comprises a plurality of contact points or surfaces and two edges for connecting the contact points or surfaces; the contact points or the surfaces are respectively contacted with a plurality of grounding copper foil frames of the fingerprint module; the two edges are in contact with the fingerprint module to support the fingerprint module; the bending surface is connected with the external circuit board.
2. The pole piece for grounding a fingerprint module of claim 1, wherein the pole piece is made of brass plated with nickel.
3. The pole piece for grounding of a fingerprint module of claim 1, wherein a contact surface of the pole piece with the fingerprint module does not exceed a grounding copper foil frame of the fingerprint module.
4. The pole piece for grounding of a fingerprint module of claim 1, wherein the square frame is provided with four contact points or faces corresponding to a grounding copper foil frame on the fingerprint module.
5. The pole piece for grounding of a fingerprint module of claim 1, wherein the bent surface is square and has a first circular hole in the middle.
6. The pole piece for grounding of a fingerprint module of claim 5, wherein the bent surface is connected with the external circuit board through a connector to contact with the copper foil of the circuit board; the connector comprises a screw.
7. A fingerprint device is characterized by comprising an injection molding shell, a fingerprint module and an external circuit board, wherein the fingerprint module and the external circuit board are arranged in the injection molding shell, and the injection molding shell also comprises a pole piece according to any one of claims 1 to 6; the injection molding shell comprises an upper injection molding shell and a lower injection molding shell; the external circuit board is connected with the lower injection molding shell; the fingerprint module is connected with the upper injection molding shell.
8. The fingerprint device of claim 7, wherein the upper injection molded housing and the lower injection molded housing are connected by a snap fit.
9. The fingerprint device according to claim 7, wherein the number of the grounding copper foil frames on the fingerprint module is four; the external circuit board is provided with a second round hole matched with the first round hole; the first circular hole is arranged in the middle of the bending surface.
10. The fingerprint device of claim 7, wherein the pole piece is mounted on an external circuit board and locked to the lower injection molded housing by screws; the fingerprint module is adhered to the upper injection molding shell through a back adhesive, and after the upper injection molding shell is connected with the lower injection molding shell, a contact point or a surface on the pole piece is in contact with a grounding copper foil frame on the fingerprint module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021828661.0U CN212675574U (en) | 2020-08-27 | 2020-08-27 | Pole piece for grounding fingerprint module and fingerprint device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021828661.0U CN212675574U (en) | 2020-08-27 | 2020-08-27 | Pole piece for grounding fingerprint module and fingerprint device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212675574U true CN212675574U (en) | 2021-03-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021828661.0U Active CN212675574U (en) | 2020-08-27 | 2020-08-27 | Pole piece for grounding fingerprint module and fingerprint device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212675574U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112101143A (en) * | 2020-08-27 | 2020-12-18 | 厦门厦华科技有限公司 | Pole piece for grounding fingerprint module and fingerprint device |
-
2020
- 2020-08-27 CN CN202021828661.0U patent/CN212675574U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112101143A (en) * | 2020-08-27 | 2020-12-18 | 厦门厦华科技有限公司 | Pole piece for grounding fingerprint module and fingerprint device |
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