CN218957481U

CN218957481U - Coil assembly and electronic equipment

Info

Publication number: CN218957481U
Application number: CN202223000535.8U
Authority: CN
Inventors: 姜强; 张海鹏
Original assignee: Lanto Electronic Ltd
Current assignee: Lanto Electronic Ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-05-02
Anticipated expiration: 2032-11-10

Abstract

The embodiment of the utility model provides a coil assembly and electronic equipment. The first adhesive layer forms a first arc-shaped groove through the substrate, the first arc-shaped edge and the second arc-shaped edge to limit the gasket structurally, and forms physical bonding fixation through self bonding force to the gasket, so that the gasket is ensured not to shrink or deviate in the assembling and transporting processes. The first arc edge and the second arc edge are respectively provided with the first positioning groove and the second positioning groove for increasing the bonding degree of the first arc edge and the second arc edge to the side wall of the gasket, the side wall of the gasket is better bonded by reducing the self stress of the arc edge, the bonding force of the gasket and the first adhesive layer is enhanced, the gasket is further ensured not to deviate or shrink inwards in the assembly process of a finished product and a semi-finished product and the subsequent transportation process, and the product yield and the reliability are improved.

Description

Coil assembly and electronic equipment

Technical Field

The utility model relates to the technical field of electronic devices, in particular to a coil assembly and electronic equipment.

Background

With the development of portable demands of electronic devices, electronic products are increasingly thinned. In the production and assembly of electronic products, thinner coils are inconvenient to assemble, and auxiliary gaskets are usually used. Auxiliary gaskets are used for positioning the coil and protecting the coil at special stations.

Taking a PC (Polycarbonate) pad for fixing an NFC (Near Field Communication) coil as an example, the PC pads are currently fixed by direct adhesion with PSA (Pressure Sensitive Adhesive ). Therefore, there is a certain risk of shrinking the PC pad during the process, and fig. 1 is a schematic diagram illustrating the existing pad shrinking. As shown in fig. 1, one side of the conventional gasket is easily contracted to deviate from the original shape due to external force, or both sides of the gasket are externally changed to change the overall gasket structure, thereby changing the shape of the coil inside the gasket and causing the product to malfunction. Furthermore, it has been simulated by reliability tests that there is also a greater risk of shifting the product during transport.

Disclosure of Invention

Accordingly, an object of the present utility model is to provide a coil assembly and an electronic device, in which the coil assembly can be mounted and then normally operated without causing problems of shrinkage and offset of the gasket.

In a first aspect, embodiments of the present utility model provide a coil assembly, including: a substrate; the first adhesive layer is arranged on the substrate and comprises a base, a first arc-shaped edge and a second arc-shaped edge which are concentrically arranged on the base in a protruding mode, and the base, the first arc-shaped edge and the second arc-shaped edge surround to form a first arc-shaped groove; the gasket is arranged in the first arc-shaped groove, and one side of the gasket, which is far away from the substrate, is provided with a second arc-shaped groove; and a coil disposed in the second arc-shaped groove; the first arc edge is provided with a plurality of first positioning grooves which are distributed at intervals in an arc shape on one side of the first arc edge away from the substrate, and the second arc edge is provided with a plurality of second positioning grooves which are distributed at intervals in an arc shape on one side of the second arc edge away from the substrate.

Further, the first arc-shaped groove comprises a bottom surface formed by a substrate, a first side wall formed by a first arc-shaped edge and a second side wall formed by a second arc-shaped edge, and the bottom surface, the first side wall and the second side wall are respectively connected with the outer wall of the gasket in an adhesive mode.

Further, the middle part of the first adhesive layer is provided with a positioning hole, the aperture of the positioning hole is smaller than the inner diameter of the first arc-shaped edge, and the aperture of the positioning hole is smaller than the inner diameter of the second arc-shaped edge.

Further, the thickness of the middle part of the substrate is larger than the thickness of the edge of the substrate, and the first adhesive layer further comprises an inclined surface arranged on the periphery of the positioning hole, and the inclined surface is attached to the substrate.

Further, the thickness of the middle part of the substrate is larger than the thickness of the edge of the substrate, and the first adhesive layer is attached to the substrate.

Further, the first positioning grooves and the second positioning grooves are arranged in one-to-one correspondence.

Further, the first positioning groove and the second positioning groove are arranged at intervals.

Further, the first arcuate slot depth is greater than or equal to the shim thickness.

Further, the second arcuate slot depth is equal to or greater than the coil thickness.

Further, the first positioning groove and/or the second positioning groove is a through groove penetrating along the direction vertical to the substrate.

Further, the first positioning groove and/or the second positioning groove are/is internally provided with a marker for assisting in positioning the gasket.

Further, the marker is a color block with a color different from that of the first adhesive layer.

Further, the marker is a machine-identifiable two-dimensional code.

Further, the first arc-shaped edge, the second arc-shaped edge, the first arc-shaped groove and the second arc-shaped groove are arc-shaped structures with matched sizes.

Further, the first adhesive layer and the gasket are of a circular ring structure with matched sizes, and the first arc-shaped edge, the second arc-shaped edge, the first arc-shaped groove and the second arc-shaped groove are of a circular ring structure with matched sizes.

Further, the coil assembly further comprises a second adhesive layer, the second adhesive layer is arranged on one side, away from the substrate, of the coil and the gasket, and the second adhesive layer is matched with the first adhesive layer to fix the gasket.

Further, the second glue film laminating gasket one side and deviate from the gasket one side all have the viscosity.

In a second aspect, embodiments of the present utility model provide an electronic device comprising a coil assembly as in the first aspect.

The embodiment of the utility model provides a coil assembly and electronic equipment. The coil sets up in the gasket, first glue film includes the basement of bonding gasket bottom and provides the first arc limit and the second arc limit of side direction fixed stay for the gasket, first glue film still provides three direction physics bonding spacing in order to ensure that the gasket does not take place the skew or shrink in the time of providing structural spacing for the gasket through above-mentioned structure. The first arc edge and the second arc edge are respectively provided with the first positioning groove and the second positioning groove to reduce the stress of the arc edge so as to better fit the side wall of the gasket, strengthen the adhesive force of the gasket and the first adhesive layer, further ensure that the gasket cannot deviate or shrink in the assembly process of the finished product and the semi-finished product and the subsequent transportation process, and improve the yield and the reliability of the product.

Drawings

The above and other objects, features and advantages of the present utility model will become more apparent from the following description of embodiments of the present utility model with reference to the accompanying drawings, in which:

FIG. 1 is a schematic illustration of prior art gasket retraction;

FIG. 2 is an exploded view of a coil assembly according to an embodiment of the present utility model;

FIG. 3 is a partial cross-sectional view of a first embodiment of the utility model;

FIG. 4 is a partial cross-sectional view of a second embodiment of the present utility model;

FIG. 5 is a partial top view of a first adhesive layer according to a first embodiment of the present utility model;

fig. 6 is a partial top view of a first glue line according to a second embodiment of the utility model.

Reference numerals illustrate:

1-a substrate; 2-a first adhesive layer; a 21-substrate; 22-a first arcuate edge; 221-a first positioning groove; 23-a second arcuate edge; 231-a second positioning groove; 24-a first arc-shaped groove; 25-positioning holes; 26-inclined plane; 3-a gasket; 31-a second arcuate slot; 4-coils; 5-a second adhesive layer.

Detailed Description

The present utility model is described below based on examples, but the present utility model is not limited to only these examples. In the following detailed description of the present utility model, certain specific details are set forth in detail. The present utility model will be fully understood by those skilled in the art without the details described herein. Well-known methods, procedures, flows, components and circuits have not been described in detail so as not to obscure the nature of the utility model.

Moreover, those of ordinary skill in the art will appreciate that the drawings are provided herein for illustrative purposes and that the drawings are not necessarily drawn to scale.

Unless the context clearly requires otherwise, the words "comprise," "comprising," and the like in the description are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to".

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly, as they may be fixed, removable, or integral, for example; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the utility model will be understood by those skilled in the art according to the specific circumstances.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

Fig. 2 is an exploded schematic view of a coil assembly according to an embodiment of the present utility model, the coil assembly including a substrate 1, a first adhesive layer 2, a spacer 3 and a coil 4. In this embodiment, the coil 4 is an NFC coil. The spacer 3 is used to secure and protect the coil 4. The spacer 3 has a second arc-shaped groove 31 for receiving and fixing the coil 4, and the second arc-shaped groove 31 has a depth equal to or greater than the thickness of the coil 4, thereby better receiving the coil 4. The first glue layer 2 has a first arc-shaped groove 24 accommodating the spacer 3, the first glue layer 2 being arranged on the substrate 1. In this embodiment, the spacer 3 is made of polycarbonate, and the substrate 1 is made of graphite. The first adhesive layer 2 may be, but is not limited to, a pressure sensitive adhesive, and the side of the first adhesive layer 2 adjacent to the gasket 3 has adhesiveness.

Fig. 3 is a partial cross-sectional view of a first embodiment of the present utility model, wherein the first adhesive layer 2 includes a substrate 21, a first arcuate edge 22 and a second arcuate edge 23, and the first arcuate edge 22 has a smaller diameter than the second arcuate edge 23. The base 21, the first arcuate side 22 and the second arcuate side 23 enclose a first arcuate slot 24 formed with concentric circular arcs on both sides, and the gasket 3 housing the coil 4 is disposed within the first arcuate slot 24. The first arc-shaped groove 24 is matched with the shape of the gasket 3, and the depth of the first arc-shaped groove is greater than or equal to the thickness of the gasket 3, so that the gasket 3 can realize embedded positioning, the stability of the gasket 3 can be effectively improved, and the gasket 3 is not easy to deviate. The first arcuate slot 24 includes a bottom surface formed by the base 21, a first side wall formed by the first arcuate edge 22, and a second side wall formed by the second arcuate edge 23. Because the first adhesive layer 2 is near the gasket 3 and has viscosity, the bottom surface is adhered to the bottom of the gasket 3, and the first side wall and the second side wall are respectively adhered and connected with the outer wall of the gasket 3. The embodiment of the utility model has the first arc-shaped edge 22 and the second arc-shaped edge 23 which are not provided in the prior gasket, thereby increasing the bonding fixation of two sides of the gasket 3 while carrying out the structure limit on the gasket 3, and forming the structure of physical bonding limit on the bottom surface and two sides and three sides of the gasket 3. The gasket 3 is further fixed by the structural limit and the bonding limit, so that the gasket cannot shrink or deviate in the assembly and subsequent transportation processes.

Fig. 5 is a partial top view of a first adhesive layer according to a first embodiment of the present utility model, where the first arcuate edge 22 is provided with a plurality of first positioning slots 221 that are distributed at intervals in an arc shape on a side of the first arcuate edge 22 away from the substrate 1, and the second arcuate edge 23 is provided with a plurality of second positioning slots 231 that are distributed at intervals in an arc shape on a side of the second arcuate edge 23 away from the substrate 1. The first positioning groove 221 and the second positioning groove 231 can reduce the stress of the first arc-shaped edge 22 and the second arc-shaped edge 23, so that the gasket 3 can be better attached while the structural strength is not affected, and more gaskets 3 with different shapes can be compatible. Because the coil 4 and the shim 3 are relatively small, the first arcuate slot 24 is also relatively small, and the first arcuate slot 24 is not easily visible to an assembler when installing the shim 3 into the first arcuate slot 24. The first positioning groove 221 and the second positioning groove 231 are located at two sides of the first arc-shaped groove 24 to form visual grabbing edges, so that assembly personnel are assisted to position the first arc-shaped groove 24, and the assembly efficiency of the coil assembly is improved.

In the present embodiment, the first positioning groove 221 and the second positioning groove 231 are blind holes. The first positioning groove 221 and/or the second positioning groove 231 are/is internally provided with a marker for assisting in assembling and positioning the first arc-shaped groove 24, so that the gasket 3 and the first adhesive layer 2 can be assembled conveniently, and damage caused in the assembling process of the gasket 3 is reduced. Specifically, when the gasket 3 is manually assembled by an assembler, the pigment with the color different from that of the first adhesive layer 2 can be painted in the positioning groove, that is, the marker is a color block with the color different from that of the first adhesive layer 2, and the thickness of the color block is greater than or equal to the groove depths of the first positioning groove 221 and the second positioning groove 231, when the color block locally protrudes out of the notch of the first positioning groove 221 and the second positioning groove 231, the configuration of the color block locally protruding is more obvious when the color block is equal to the depths of the first positioning groove 221 and the second positioning groove 231, and the machine identification is more convenient. When the gasket 3 is assembled by a machine, the marker may be a machine-identifiable marking, such as a bar code, two-dimensional code, or the like, to facilitate machine installation.

In some embodiments, the first positioning groove 221 and/or the second positioning groove 231 is a through groove penetrating in a direction perpendicular to the substrate 1. The positioning groove provided in this way can be formed by using an assembly table with a color different from that of the first adhesive layer 2 or a substrate 1 with a color different from that of the first adhesive layer 2, and a visual grabbing edge is formed without providing a color block so that an assembler can recognize the positioning groove to position the first arc-shaped groove 24 so as to mount the gasket 3.

As shown in fig. 5, the first positioning grooves 221 and the second positioning grooves 231 are provided in one-to-one correspondence. The both ends of constant head tank that correspond each other and set up are parallel and level each other, and this kind of constant head tank structure has higher reliability, when one side constant head tank damages, corresponds the side constant head tank and can ensure that the arc limit of this side closely laminates gasket 3 to ensure the fixed action to gasket 3. Furthermore, this structural design allows the first and second

arcuate edges

22, 23 to be machined using the same mold, thereby simplifying the production steps of the first adhesive layer 2.

Fig. 6 is a partial top view of a first adhesive layer according to a second embodiment of the present utility model, in which a first positioning groove 221 and a second positioning groove 231 are spaced apart from each other. The second arcuate edge 23 beside the first positioning slot 221 does not have a complete second positioning slot 231. The front side of the first positioning groove 221 corresponds to the rear side of the adjacent second positioning groove 231. The design can ensure that one side of the arc-shaped edge adhered with the gasket 3 is always provided with the positioning groove, so that at least one side of the arc-shaped edge is ensured to have good fitting performance, and the reliability of fixing the gasket 3 by the first adhesive layer 2 is improved.

Further, the first arc-shaped edge 22, the second arc-shaped edge 23, the first arc-shaped groove 24 and the second arc-shaped groove 31 are arc-shaped structures with matched sizes, and the number of central angles of the arc-shaped structures is larger than a preset value. In this embodiment, the predetermined value is 180 °.

In some embodiments, the coil 4 is a circular coil, where the predetermined value is 360 °. The first adhesive layer 2 and the gasket 3 are of a circular ring structure with matched sizes, and the first arc-shaped edge 22, the second arc-shaped edge 23, the first arc-shaped groove 24 and the second arc-shaped groove 31 are of a circular ring structure with matched sizes.

In this embodiment, the substrate 1 is a graphite wafer. In some embodiments, the substrate 1 has a through hole in the center. The first adhesive layer 2 is of an annular structure, and the middle part of the first adhesive layer is provided with a positioning hole 25. The positioning holes 25 correspond to the through holes to position the installation position of the first adhesive layer 2. The aperture of the positioning hole 25 is smaller than the inner diameter of the first arc-shaped edge 22, and the aperture of the positioning hole 25 is smaller than the inner diameter of the second arc-shaped edge 23. The positioning holes 25 can also reduce the volume of the first adhesive layer 2, so that the manufacturing cost is saved and the whole coil structure has lighter weight.

In the first embodiment of the present utility model, the substrate 1 is a disk having a thickness greater in the middle than in the edges, and the substrate 1 has an annular slope due to the thickness variation. The outer edge of the disc is provided with a sinking groove matched with the first adhesive layer 2 in shape, and the annular slope is arranged on the inner side of the sinking groove or the outer side of the sinking groove. As shown in fig. 3, the first adhesive layer 2 is partially or wholly disposed in the countersink, and the first arc-shaped edge 22 is disposed on the annular slope and is inclined along the annular slope, so that the first adhesive layer 2 can be better fixed with the substrate 1, and the reliability of the coil assembly is improved. The first arc-shaped edge 22 is provided with the first positioning groove 221, and the first positioning groove 221 can reduce the self stress of the first arc-shaped edge 22 to be attached to the gasket 3 and enable the first arc-shaped edge 22 to be attached to the annular slope better.

Fig. 4 is a partial cross-sectional view of a second embodiment of the present utility model, the first adhesive layer 2 further includes an inclined surface 26 extending centrally from the base 21 under the first arcuate edge 22. The inclined surface 26 conforms to the annular ramp. The inclined surface 26 is attached to the substrate 1 and increases the contact area between the first adhesive layer 2 and the substrate 1, so that the first adhesive layer 2 can be better fixed with the substrate 1, and the reliability of the coil assembly is improved.

The coil assembly further comprises a second glue layer 5 arranged on the side of the spacer 3 remote from the substrate 1. The second adhesive layer 5 may be, but is not limited to, a pressure sensitive adhesive. The second adhesive layer 5 is matched with the first adhesive layer 2 to fix the gasket 3. In this embodiment, the second adhesive layer 5 is adhered to one surface of the spacer 3 and one surface facing away from the spacer 3, so that the coil 4, the spacer 3, the first adhesive layer 2, the substrate 1 and other structures can be adhered, and the coil assembly and other structures can be connected while the structures of the coil assembly are fixed.

The embodiment of the utility model also provides electronic equipment, which is provided with the coil assembly structure. The electronic device has higher reliability due to the coil assembly structure.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and various modifications and variations may be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A coil assembly, the coil assembly comprising:

a substrate (1);

the first adhesive layer (2) is arranged on the substrate (1), the first adhesive layer (2) comprises a base (21) and a first arc-shaped edge (22) and a second arc-shaped edge (23) which are concentrically and convexly arranged on the base (21), and the base (21), the first arc-shaped edge (22) and the second arc-shaped edge (23) surround to form a first arc-shaped groove (24);

a gasket (3) arranged in the first arc-shaped groove (24), wherein a second arc-shaped groove (31) is arranged on one side of the gasket (3) away from the substrate (1); and

a coil (4) disposed within the second arcuate slot (31);

the first arc-shaped side (22) is provided with a plurality of first positioning grooves (221) which are distributed at intervals in an arc shape and are arranged on one side, far away from the substrate (1), of the first arc-shaped side (22), and the second arc-shaped side (23) is provided with a plurality of second positioning grooves (231) which are distributed at intervals in an arc shape and are arranged on one side, far away from the substrate (1), of the second arc-shaped side (23).

2. Coil assembly according to claim 1, characterized in that the first arc-shaped groove (24) comprises a bottom surface formed by the base (21), a first side wall formed by the first arc-shaped edge (22) and a second side wall formed by the second arc-shaped edge (23), which bottom surface, the first side wall and the second side wall are respectively adhesively connected to the outer wall of the spacer (3).

3. Coil assembly according to claim 1, characterized in that the middle part of the first glue layer (2) is provided with a positioning hole (25), the aperture of the positioning hole (25) is smaller than the inner diameter of the first arc-shaped side (22), and the aperture of the positioning hole (25) is smaller than the inner diameter of the second arc-shaped side (23).

4. A coil assembly according to claim 3, wherein the thickness of the middle part of the substrate (1) is larger than the thickness of the edge of the substrate (1), the first adhesive layer (2) further comprises an inclined surface (26) provided on the circumferential side of the positioning hole, and the inclined surface (26) is attached to the substrate (1).

5. Coil assembly according to claim 1, characterized in that the thickness of the middle part of the substrate (1) is greater than the thickness of the edges of the substrate (1), the first glue layer (2) being attached to the substrate (1).

6. The coil assembly according to claim 1, wherein the first positioning grooves (221) and the second positioning grooves (231) are provided in one-to-one correspondence.

7. The coil assembly according to claim 1, wherein the first positioning slot (221) and the second positioning slot (231) are arranged at a distance from each other.

8. Coil assembly according to claim 1, characterized in that the first arcuate slot (24) has a depth equal to or greater than the thickness of the shim (3).

9. Coil assembly according to claim 1, characterized in that the second arc-shaped groove (31) has a depth equal to or greater than the thickness of the coil (4).

10. Coil assembly according to claim 1, characterized in that the first positioning slot (221) and/or the second positioning slot (231) are through slots running in a direction perpendicular to the substrate (1).

11. Coil assembly according to claim 1, characterized in that the first positioning slot (221) and/or the second positioning slot (231) have a marker inside them that aids in positioning the shim (3).

12. Coil assembly according to claim 11, characterized in that the marker is a colour block of a different colour to the first glue layer (2).

13. The coil assembly of claim 11, wherein the marker is a machine identifiable two-dimensional code.

14. The coil assembly of claim 1, wherein the first arcuate edge (22), the second arcuate edge (23), the first arcuate slot (24) and the second arcuate slot (31) are cooperatively dimensioned arcuate structures.

15. The coil assembly according to claim 1, wherein the first adhesive layer (2) and the spacer (3) are of a ring structure with matched dimensions, and the first arcuate edge (22), the second arcuate edge (23), the first arcuate slot (24) and the second arcuate slot (31) are of a ring structure with matched dimensions.

16. The coil assembly according to claim 1, further comprising a second glue layer (5), the second glue layer (5) being arranged on a side of the coil (4) and the spacer (3) remote from the substrate (1), the second glue layer (5) being adapted to fix the spacer (3) in cooperation with the first glue layer (2).

17. Coil assembly according to claim 16, characterized in that the second glue layer (5) has an adhesive property both on the side that is applied to the shim (3) and on the side that is directed away from the shim (3).

18. An electronic device comprising a coil assembly according to any one of claims 1-17.