CN203826559U - Coil antenna and antenna device - Google Patents
Coil antenna and antenna device Download PDFInfo
- Publication number
- CN203826559U CN203826559U CN201320878055.3U CN201320878055U CN203826559U CN 203826559 U CN203826559 U CN 203826559U CN 201320878055 U CN201320878055 U CN 201320878055U CN 203826559 U CN203826559 U CN 203826559U
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- China
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- coil
- antenna
- antenna substrate
- magnetic sheet
- sheet material
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- Expired - Fee Related
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Abstract
The utility model provides a coil antenna and an antenna device. The coil antenna comprises an antenna substrate, a coil formed on one main face of the antenna substrate, and a magnetic sheet formed on one main face of the antenna substrate. In the peripheral side of the antenna substrate, a holding part is arranged between the antenna substrate and the magnetic sheet. As the holding part is arranged between the antenna substrate and the magnetic sheet in the peripheral side of the antenna substrate, the holding part can enable the magnetic sheet and the antenna substrate to contact tightly directly when the antenna substrate and the magnetic sheet are crimped. Accordingly, the pressure during the crimping can be uniformly transmitted to the holding part and thus the magnetic sheet can be prevented from detaching from the antenna substrate.
Description
Technical field
The utility model relates to antenna assembly, relates in particular to the RFID label of HF frequency band, the antenna assembly that read write line utilizes.
Background technology
RFID (Radio Frequency Identification: radio-frequency (RF) identification) popularized as expense system, Articla management system.In rfid system, with cordless, make read write line and RFID label carry out radio communication, between these devices, receive and dispatch high-frequency signal.Read write line and RFID label comprise respectively: for the treatment of the wireless IC chip of high-frequency signal; And for the antenna element of sending and receiving high-frequency signal.
If be for example the HF frequency band rfid system that utilizes 13.56MHz frequency band, use coil antenna to be used as antenna.And the coil antenna of the coil antenna of read write line side and RFID label-side is coupled via induced field.
This rfid system also carries in mobile phone and smart mobile phone etc. in recent years.Knownly in the housing of being made by metallic plate of mobile phone or smart mobile phone, coil antenna is set, and as RFID label.
Conventionally, for carry the situation of coil antenna in mobile phone and smart mobile phone, on the metallic plate 1 as mobile phone and smart mobile phone housing, be formed with coil antenna 1.Coil antenna 1 disposes successively adhesive sheet 2, antenna substrate 3, magnetic sheet material 5 from metallic plate 1 one sides.On two interareas of antenna substrate 3, be formed with coil 4a and the 4b being formed above by the coilings such as electrode material 1 circles such as copper.This antenna substrate 3 is adhesively fixed on metallic plate 1 via adhesive sheet 2.In addition, known to improve communication performance, at the upper surface of antenna substrate 3, magnetic sheet material 5 is set.
According to the difference of mobile phone and smart mobile phone, as shown in Fig. 1 (A), Fig. 1 (B), have sometimes the cut portion 11 of the part excision of metal portion 1.The peristome 7 of roughly the same shape also can be set accordingly on coil antenna 1.Now, be arranged to the cut portion 11 of metallic plate 1 and the peristome 7 of coil antenna 1 is consistent.
Utility model content
Thus, if adopt near the structure that is formed with cut portion 11 end edge portion of metallic plate 1 or end edge portion, need structure as following.
(1) due to magnetic flux, be concentrated in the inner peripheral end of cut portion 11, therefore near the ora terminalis of the preferred cut portion 11 at metallic plate 1, configure coil 4a and 4b.
(2) due to when connecting the flux channeled peripheral part to mobile terminal of cut portion 11, can improve communication performance, therefore preferably magnetic sheet material 5 forms greatlyr than coil 4a and the 4b of coil antenna 1.
(3) in order to make coil antenna 1 and metallic plate 10 (below also referred to as installation base plate) closely fixing, need on whole of coil antenna 1, attach adhesive sheet 2.(in fact, antenna substrate 3 is identical shaped with adhesive sheet 2)
Design based on 1-3, when manufacturing coil antenna 1, order with adhesive sheet 2, antenna substrate 3, magnetic sheet material 5 is carried out stacked and crimping, but because coil 4a and the 4b of antenna substrate 3 has thickness, can near the cut portion 11 of metallic plate 10, be formed obliquely, therefore may, in the generation space, region of the peripheral edge portion (dotted portion of Fig. 2 and Fig. 3) of coil antenna 1, cause not fluid-tight engagement.As shown in Figure 3, even pressurize in order to strengthen, pressure is also difficult to be delivered to following dotted portion, causes connecting airtight insufficient, can produce the problem that magnetic sheet material 1 is peeled off from this end edge portion.
The purpose of this utility model is to provide a kind of coil antenna and antenna assembly of peeling off that be difficult to produce between antenna substrate and magnetic sheet material.Especially, object is that online circle is formed in the coil antenna of central portion side of antenna substrate, prevents that magnetic sheet material from peeling off from antenna substrate.
A kind of coil antenna of the present utility model is characterised in that, comprising: antenna substrate; Coil, this coil is formed on an interarea of antenna substrate; And magnetic sheet material, this magnetic sheet material is formed on an interarea side of antenna substrate, in the outer peripheral edges side of antenna substrate, between antenna substrate and magnetic sheet material, is provided with maintaining part.
Due near the outer peripheral edges at magnetic sheet material, be provided with maintaining part between antenna substrate and magnetic sheet material, therefore, when antenna substrate and magnetic sheet material are carried out to crimping, maintaining part can make magnetic sheet material and antenna substrate directly connect airtight.Its result, pressure Transmit evenly during crimping is to maintaining part, can prevent that magnetic sheet material from peeling off from antenna substrate.
Coil antenna of the present utility model is characterised in that, the thickness of maintaining part is identical with coil essence.
When the thickness of maintaining part is identical with coil essence, magnetic sheet material with maintaining part in identical height and position fluid-tight engagement, therefore comparatively preferred.
Coil antenna of the present utility model is characterised in that, at the middle section of antenna substrate, is formed with open pore, and coil is formed near open pore.
Under structure as described above, coil is formed obliquely near the opening of antenna substrate, is the central portion side of antenna substrate.Therefore, do not form coil pattern, thereby can not keep magnetic sheet material at the outer circumferential side of antenna substrate, magnetic sheet material is easily peeled off.The technological thought of the utility model application is particularly useful for having the coil antenna of this structure.
Coil antenna of the present utility model is characterised in that, maintaining part consists of linear structure, and this linear structure consists of the pattern identical with coil.
In this situation, while using with printed coil, identical pattern just can form maintaining part near the periphery of antenna substrate.The operation that forms maintaining part is comparatively easy, can manufacture simply.
Coil antenna of the present utility model is characterised in that, maintaining part by by coil, the coil that is positioned at the most peripheral side of the antenna substrate peripheral part side that is drawn out to antenna substrate forms.
In this situation, by making to be positioned at the coil of antenna substrate most peripheral side itself, be drawn out to the peripheral part side of antenna substrate, the major part of magnetic sheet material is kept by this maintaining part, therefore can make crimping more stable, thereby can prevent more reliably peeling off of magnetic sheet material.
Coil antenna of the present utility model is characterised in that, on another interarea of antenna substrate, is formed with coil, and another interarea side that is formed with the antenna substrate of coil is formed with adhesive sheet.
In this situation, because coil antenna main body is provided with adhesive sheet, be therefore easily installed on installation base plate.
Coil antenna of the present utility model is characterised in that, at the outer circumferential side of antenna substrate, between antenna substrate and adhesive sheet, is provided with maintaining part.
Due to not only, in magnetic sheet material one side of antenna substrate, also maintaining part is set in adhesive sheet one side, be therefore the magnetic sheet material structure further consistent with the height and position of antenna substrate.Therefore, when by magnetic sheet material, antenna substrate and resin sheet crimping, magnetic sheet material and maintaining part are further connected airtight, and are not easy to produce to peel off.
Coil antenna of the present utility model is characterised in that, the part of the antenna substrate side in the outer peripheral edges of magnetic sheet material is provided with the rib that thickness is identical with the coil thickness of antenna and is used as maintaining part.
Due to not in antenna substrate side, and in magnetic sheet material one side, be provided as the rib of maintaining part, therefore without forming more coil pattern, can only utilize the shape of magnetic sheet material to improve adhesion.
Antenna assembly of the present utility model comprises: installation base plate; Antenna substrate, this antenna substrate is formed on installation base plate; Coil, this coil is formed on two interareas of antenna substrate; Magnetic sheet material, this magnetic sheet material is formed on an interarea side of antenna substrate; Adhesive sheet, this adhesive sheet is formed on another interarea side of antenna substrate; Coil antenna, this coil antenna between antenna substrate and magnetic sheet material and/or outer peripheral edges side between antenna substrate and adhesive sheet, antenna substrate be provided with maintaining part; And transmission circuit, this transmission circuit is electrically connected to coil antenna, it is characterized in that, the central portion of installation base plate is formed with cut portion, coil antenna is formed with the open pore corresponding with the cut portion of installation base plate, and the coil of coil antenna is formed on the peripheral side of peristome.
For the above-mentioned situation that like that forms cut portion at the central portion of installation base plate, is provided with the coil antenna of the open pore corresponding with this cut portion, coil is formed obliquely near the open pore of antenna substrate, is the central portion side of antenna substrate.Therefore, do not form coil pattern, thereby can not keep magnetic sheet material at the outer circumferential side of antenna substrate, magnetic sheet material is easily peeled off.The technological thought of the utility model application is particularly useful for having the antenna assembly of this structure.
Accompanying drawing explanation
Fig. 1 (A), Fig. 1 (B) are the schematic diagrames of the antenna assembly of prior art.
Fig. 2 is the profile along the AA' line of Fig. 1 (A) and Fig. 1 (B).
Fig. 3 is the schematic diagram when antenna assembly of prior art is exerted pressure.
Fig. 4 is the schematic diagram of the coil antenna of the utility model embodiment 1.
Fig. 5 is the schematic diagram of the another way of the utility model embodiment 1.
Fig. 6 is that the variation of the utility model embodiment 1 is the schematic diagram of embodiment 2.
Fig. 7 is that the variation of the utility model embodiment 1 is the schematic diagram of embodiment 3.
Fig. 8 is that the variation of the utility model embodiment 1 is the schematic diagram of embodiment 4.
Embodiment
< embodiment 1>
[structure]
Fig. 1 (A), Fig. 1 (B) are the schematic diagrames of the antenna assembly of prior art, and make the schematic diagram of antenna assembly of the present utility model.The transmission circuit (not shown) that antenna assembly has coil antenna 1, the installation base plate 10 of coil antenna 1 is installed and is electrically connected to coil antenna 1.
Installation base plate 10 is arranged on the installation base plate 10 in mobile phone and smart mobile phone, uses metallic plate or utilizes metal pair surface to carry out the sheet material of plating.In addition, a part for installation base plate 10 of the present utility model is provided with cut portion 11.Cut portion 11 might not be set, even the shape of cut portion 11 is not set, also can be suitable for the utility model.
Fig. 4 is the vertical view of coil antenna 1 of the present utility model.
Coil antenna 1 of the present utility model has antenna substrate 3, the adhesive sheet 2 that coil antenna 1 and installation base plate 10 are adhesively fixed and the magnetic sheet material 5 arranging in order to strengthen magnetic coupling.
On the first surface of antenna substrate 3 of the present utility model, be formed with the first coil 4a, and be formed with the second coil 4b on second of first surface.
Here, antenna substrate 3 consists of pet substrate, and its flat shape is rectangle.Antenna substrate 3 is not limited to this, such as also using flexible base, board etc.
The first coil 4a and the second coil 4b form by the electrode pattern that makes to consist of compared with thin metal material like that Copper Foil, the aluminium foil one or many that detours ringwise.The first coil 4a is identical with the direction of circling of the second coil 4b, and the first coil 4a and the second coil 4b conducting via being arranged on through hole on substrate (not shown), and is connected in series.In addition, direction of circling and the number that detours etc. can suitably change according to various requirement.In Fig. 4, detoured 4 times on (4 ring).
Consider that the inductance of this first coil 4a and the second coil 4b or the electric capacity such as line capacitance of the first coil 4a and the second coil 4b design live width, the distance between centers of tracks of coil pattern, near the resonance frequency of the signal that Shi Qi signal post is used.
In the utility model, at the middle body of antenna substrate 3, be formed with peristome 7.This peristome 7 forms mainly with the corresponding mode of cut portion 11 shapes with installation base plate 10 greatly.For the situation that is provided with this peristome 7, magnetic flux is concentrated in the inner peripheral end of cut portion 11, and the first coil 4a or the second coil 4b mostly therefore can detour near peristome 7.Therefore, can near the peripheral part of coil antenna 1, vacate the space suitable with coil thickness.
In addition via the wire of drawing from the first coil 4a and the second line 4b circle, be electrically connected to transmission circuit (not shown).In transmission circuit, be for example provided with IC chip and match circuit for RFID.
In the utility model application, between antenna substrate 3 and magnetic sheet material 5, be provided with the maintaining part 6 that magnetic sheet material 5 is kept.Thus, even the overlapping and crimping by antenna substrate 3 and magnetic sheet material 5, due to the existence of maintaining part 6, antenna substrate 3 can connect airtight via maintaining part 6 with magnetic sheet material 5, so magnetic sheet material 5 is not easy to peel off.For the material of maintaining part 6, can use the electrode material of being made by the material identical with the first coil 4a, also can use different electrode materials, metal, resin etc. even.In addition, the thickness of maintaining part 6 is preferably identical with the first coil 4a in fact thickness.Now, preferably make magnetic sheet material 5 with maintaining part 6 in identical height and position fluid-tight engagement.Yet, might not want thickness identical, as long as can obtain the effect of the utility model application, the slightly thick or Bao Junke slightly of thickness.
As shown in Figure 4, be characterised in that, for this maintaining part 6, in fact the coil pattern with the coil width identical with the first coil 4a is arranged on antenna substrate 3 two interareas outer circumferential side (, outer circumferential side at magnetic sheet material 5 and adhesive sheet 2 also has), and be not electrically connected to the first coil 4a and the second coil 4b.Like this, as long as form the coil of identical patterns when forming the first coil 4a and the second coil 4b, can easily form maintaining part 6.In addition,, because this maintaining part 6 is not electrically connected to the first coil 4a, therefore, even if this maintaining part 6 is set, can not produce substantial effect to antenna performance yet.
In addition, adhesive sheet 2 of the present utility model is at installation base plate 10, the coil antenna 1 that is adhesively fixed on the sheet material of metal that has been sheet metal or plating.Therefore, it is preferably dimensioned to be and has the area identical with coil antenna 1.It has used resin materials such as acrylic acid, epoxy, but is not limited to this.And thickness, viscosity etc. also can carry out various adjustment.
Magnetic sheet material 5 of the present utility model is arranged on not formation adhesive sheet 2 one sides of antenna substrate 3.This is at coil 4a and 4b induced inside magnetic flux, thereby produces induced electromotive force setting in coil 4a and 4b.Magnetic sheet material 5 is preferably used such as the material consisting of Mn-Zn ferrite, Ni-Zn ferrite etc., but is not limited to this.In addition, the structure of magnetic sheet material 5 is preferably large to the degree that covers coil antenna 1 completely.This be because, if by connecting the flux channeled peripheral part to mobile terminal of the cut portion 11 of installation base plate 10, more can improve communication performance.Yet, also can not exclusively cover and expose a part.
In addition, maintaining part 6 also can as shown in Figure 5, only be formed on magnetic sheet material 5 one sides of antenna substrate 3.Also can only be formed on adhesive sheet 2 one sides.Any side that is only formed on antenna substrate 3 can significantly be improved characteristic.
< embodiment 2>
Fig. 6 is that the variation of embodiment 1 is embodiment 2.In embodiment 2, between antenna substrate 3 and adhesive sheet 2, be also provided with the maintaining part 6 that adhesive sheet 2 is kept near the outer peripheral edges of above-mentioned antenna substrate 3.Other content is identical with embodiment 1.
Under this structure, due to not only, in magnetic sheet material 5 one sides of antenna substrate 3, also maintaining part 6 is set in adhesive sheet 2 one sides, be therefore magnetic sheet material 5 structure further consistent with the height and position of antenna substrate 3.Therefore, when by magnetic sheet material 5, antenna substrate 3 and resin sheet crimping, magnetic sheet material 5 further connects airtight with maintaining part 6, and magnetic sheet material 5, resin sheet are all difficult to produce to be peeled off.
< embodiment 3>
[structure]
Fig. 7 is that the variation of embodiment 1 is embodiment 3.In embodiment 3, by being positioned at the coil 4aa of most peripheral side and peripheral part side that 4ba extends to magnetic sheet material 5 in the first coil 4a and the second coil 4b, form.This is positioned at the coil 4aa of most peripheral side and the effect that 4ba plays maintaining part 6.Other content is identical with embodiment 1.
Under this structure, by by fact to coil 4a and the inoperative coil pattern 4aa of most peripheral side and the peripheral part side that 4ba itself is drawn out to magnetic sheet material 5 of being positioned at of 4b characteristic, the major part of magnetic sheet material 5 is kept by this maintaining part 6, can further increase and connect airtight area, thereby can prevent more reliably peeling off of magnetic sheet material 5.In addition, although be positioned at coil pattern 4aa and the 4ba of most peripheral side, can be electrically connected to other coil pattern 4a and 4b, because electric current flows with beeline, therefore can have electric current to flow through at peripheral part hardly, therefore can not produce substantial effect to antenna performance.
< embodiment 4>
[structure]
Fig. 8 is that the variation of embodiment 1 is embodiment 4.In embodiment 4, not utilize the first coil 4a to form maintaining part 6, but in the outer peripheral edges of magnetic sheet material 5, the rib 6a that thickness is identical with the first coil 4a essence is set.Other content is identical with embodiment 1.
Under this structure, because the outer peripheral edges at magnetic sheet material 5 arrange rib 6a, be used as maintaining part, therefore, without forming too much coil pattern, can only utilize the shape of magnetic sheet material 5 to improve adhesion.
Label declaration
1 coil antenna
2 adhesive sheets
3 antenna substrates
4a, 4b coil
4aa, the coil of 4ba most peripheral side
5 magnetic sheet materials
6 maintaining parts
6a rib
7 peristomes
10 installation base plates
11 cut portions
Claims (11)
1. a coil antenna, is characterized in that, comprising:
Antenna substrate;
Coil, this coil is formed on an interarea of described antenna substrate; And
Magnetic sheet material, this magnetic sheet material is formed on an interarea side of described antenna substrate,
In the outer peripheral edges side of described antenna substrate,
Between described antenna substrate and described magnetic sheet material, be provided with maintaining part.
2. coil antenna as claimed in claim 1, is characterized in that,
The thickness of described maintaining part is identical with described coil essence.
3. coil antenna as claimed in claim 1 or 2, is characterized in that,
Middle section at described antenna substrate is formed with open pore, and described coil is formed near described open pore.
4. the coil antenna as described in any one of claim 1 or 2, is characterized in that,
Described maintaining part consists of linear structure, and this linear structure consists of the pattern identical with described coil.
5. the coil antenna described in any one as claimed in claim 3, is characterized in that,
Described maintaining part consists of linear structure, and this linear structure consists of the pattern identical with described coil.
6. the coil antenna as described in any one of claim 1 or 2, is characterized in that,
Described maintaining part by by described coil, the coil that is positioned at the most peripheral side of the described antenna substrate peripheral part side that is drawn out to described antenna substrate forms.
7. the coil antenna described in any one as claimed in claim 3, is characterized in that,
Described maintaining part by by described coil, the coil that is positioned at the most peripheral side of the described antenna substrate peripheral part side that is drawn out to described antenna substrate forms.
8. the coil antenna as described in any one of claim 1 or 2, is characterized in that,
On another interarea of described antenna substrate, be formed with described coil,
Another interarea side that is formed with the described antenna substrate of described coil is formed with adhesive sheet.
9. coil antenna as claimed in claim 8, is characterized in that,
At the outer circumferential side of described antenna substrate,
Between described antenna substrate and described adhesive sheet, be provided with described maintaining part.
10. the coil antenna as described in any one of claim 1 or 2, is characterized in that,
The part of the described antenna substrate side in the outer peripheral edges of described magnetic sheet material is provided with the rib that thickness is identical with the coil thickness of described antenna and is used as described maintaining part.
11. 1 kinds of antenna assemblies, comprising:
Installation base plate;
Antenna substrate, this antenna substrate is formed on described installation base plate;
Coil, this coil is formed on two interareas of described antenna substrate;
Magnetic sheet material, this magnetic sheet material is formed on an interarea side of described antenna substrate;
Adhesive sheet, this adhesive sheet is formed on another interarea side of described antenna substrate;
Coil antenna, this coil antenna between described antenna substrate and described magnetic sheet material and/or outer peripheral edges side between described antenna substrate and described adhesive sheet, described antenna substrate be provided with maintaining part; And
Transmission circuit, this transmission circuit is electrically connected to described coil antenna, it is characterized in that,
The central portion of described installation base plate is formed with cut portion,
Described coil antenna is formed with the open pore corresponding with the cut portion of described installation base plate,
The coil of described coil antenna is formed on the peripheral side of described peristome.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320878055.3U CN203826559U (en) | 2013-12-27 | 2013-12-27 | Coil antenna and antenna device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320878055.3U CN203826559U (en) | 2013-12-27 | 2013-12-27 | Coil antenna and antenna device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203826559U true CN203826559U (en) | 2014-09-10 |
Family
ID=51482026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320878055.3U Expired - Fee Related CN203826559U (en) | 2013-12-27 | 2013-12-27 | Coil antenna and antenna device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203826559U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107204510A (en) * | 2016-03-18 | 2017-09-26 | Tdk株式会社 | Antenna assembly and the portable wireless apparatus for possessing it |
| CN107871600A (en) * | 2016-09-22 | 2018-04-03 | 三星电机株式会社 | Coil module and the wireless power dispensing device using the coil module |
-
2013
- 2013-12-27 CN CN201320878055.3U patent/CN203826559U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107204510A (en) * | 2016-03-18 | 2017-09-26 | Tdk株式会社 | Antenna assembly and the portable wireless apparatus for possessing it |
| CN107871600A (en) * | 2016-09-22 | 2018-04-03 | 三星电机株式会社 | Coil module and the wireless power dispensing device using the coil module |
| CN107871600B (en) * | 2016-09-22 | 2020-07-14 | 株式会社Wits | Coil module and wireless power transmission device using the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20211227 |