CN110053315A - A kind of flexibility frequency-selective surfaces and preparation method - Google Patents
A kind of flexibility frequency-selective surfaces and preparation method Download PDFInfo
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- CN110053315A CN110053315A CN201910309529.4A CN201910309529A CN110053315A CN 110053315 A CN110053315 A CN 110053315A CN 201910309529 A CN201910309529 A CN 201910309529A CN 110053315 A CN110053315 A CN 110053315A
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- 238000002360 preparation method Methods 0.000 title claims description 10
- 241001232787 Epiphragma Species 0.000 claims abstract description 28
- 239000012528 membrane Substances 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000007711 solidification Methods 0.000 claims abstract description 5
- 230000008023 solidification Effects 0.000 claims abstract description 5
- 230000000737 periodic effect Effects 0.000 claims description 14
- 238000007731 hot pressing Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000005530 etching Methods 0.000 claims description 5
- 238000002203 pretreatment Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000004642 Polyimide Substances 0.000 claims description 3
- 230000003064 anti-oxidating effect Effects 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 229920006267 polyester film Polymers 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 3
- 210000004379 membrane Anatomy 0.000 description 16
- 210000002469 basement membrane Anatomy 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
- B32B3/085—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts spaced apart pieces on the surface of a layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/162—Cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/208—Magnetic, paramagnetic
Landscapes
- Laminated Bodies (AREA)
Abstract
The present invention provides a kind of flexible frequency-selective surfaces, including glue-line；The lower surface of the glue-line is covered with base membrane layer, and solidification has frequency to select layer in glue-line, and the upper surface of glue-line is covered with epiphragma layer；The frequency selects layer for forming electromagnetic protection or RCS reduction to equipment, and base membrane layer and glue-line are for protecting frequency that layer is selected to avoid being damaged and insulate, and epiphragma layer is for protecting the flexibility frequency-selective surfaces integrally to avoid being damaged.The present invention is fabricated to bent flexible frequency-selective surfaces using flexible material, can accordingly be cut according to size requirements；It is able to achieve the conformal fitting of each curved-surface structure and installation is simple to operation；It can be effectively reduced the cost of manufacture of curved-surface structure frequency-selective surfaces；Compared with traditional curved-surface structure frequency-selective surfaces, the actual use performances of flexible frequency-selective surfaces is closer to design objective.
Description
Technical field
The present invention relates to a kind of flexible frequency-selective surfaces and preparation methods, belong to technical field of electromagnetic compatibility, can be used for
The electromagnetic protection of all kinds of curved-surface structures.
Background technique
Frequency-selective surfaces have been widely used in promoting aircraft, radar etc. as a kind of functional form microwave defense material
Stealth capabilities on, have the characteristics that obviously to reduce RCS.But with the development of technology and demand, either aircraft or radar
All there is more and more curved-surface structures, such as the airflow design of aircraft, the conformal design of antenna, traditional not bent frequency
Rate selection surface can only be made by the methods of fragment approximate expansion, microfabrication, big, at high cost, molding that there are manufacture difficulties
The disadvantages of performance is undesirable afterwards.Therefore, using it is traditional can not inflection frequency selection surface have been unable to meet increasing song
Face structure electromagnetic protection demand.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of flexible frequency-selective surfaces and preparation method, the flexibility
Frequency-selective surfaces and preparation method high reliablity, production is simple, bending is good, is easy installation, the table suitable for curved-surface structure
The out-of-band interference of face paste dress, RCS reduction and antenna that object may be implemented inhibits.
The present invention is achieved by the following technical programs.
A kind of flexible frequency-selective surfaces provided by the invention, including glue-line；The lower surface of the glue-line is covered with basement membrane
Layer, the interior solidification of glue-line have frequency to select layer, and the upper surface of glue-line is covered with epiphragma layer；The frequency selects layer anti-for forming electromagnetism to equipment
Shield or RCS reduction, base membrane layer and glue-line are for protecting frequency that layer is selected to avoid being damaged and insulate, and epiphragma layer is for protecting the flexibility
Frequency-selective surfaces integrally avoid being damaged.
It is the flexible copper foil with two-dimensional periodic structure that the frequency, which selects layer,.
The two-dimensional periodic structure is prepared using engraving method.
The material of the base membrane layer and epiphragma layer is polyimides or polyester film.
The base membrane layer is by hot-press solidifying in the lower surface of glue-line, and epiphragma layer is by hot-press solidifying in the upper table of glue-line
Face.
The frequency, which selects, is evenly distributed with the identical patch of several shapes or slit on layer.
A kind of preparation method based on flexible frequency-selective surfaces, comprising the following steps:
S1. pre-treatment: cleaning frequency selects the spot and oxide of layer surface；
S2 pastes base membrane layer: layer will be selected to be glued on base membrane layer by glue-line frequently；
S3. it selects layer to etch frequently: layer will be selected to be made as two-dimensional periodic structure frequently by etching；
S4. it is surface-treated: to selecting layer surface to carry out anti-oxidation processing frequently；
S5. it pastes epiphragma layer: epiphragma layer being glued at frequency by glue-line and is selected on layer；
S6. it hot pressing: to the flexibility frequency-selective surfaces integral heat pressure, shapes；
S7. solidify: the flexible frequency-selective surfaces integrally curing after hot pressing carries out qualitative.
The beneficial effects of the present invention are: bent flexible frequency-selective surfaces are fabricated to using flexible material, it can root
It is accordingly cut according to size requirements；It is able to achieve the conformal fitting of each curved-surface structure and installation is simple to operation；It can effectively drop
The cost of manufacture of low curved-surface structure frequency-selective surfaces；Compared with traditional curved-surface structure frequency-selective surfaces, flexible frequency choosing
The actual use performance on surface is selected closer to design objective.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram that frequency of the invention selects layer；
Fig. 3 is flow chart of the invention；
In figure: 1- base membrane layer, 2- glue-line, 3- frequency select layer, 4- epiphragma layer.
Specific embodiment
Be described further below technical solution of the present invention, but claimed range be not limited to it is described.
As depicted in figs. 1 and 2, a kind of flexible frequency-selective surfaces, including glue-line 2；The lower surface of the glue-line 2 is covered with
Base membrane layer 1, the interior solidification of glue-line 2 have frequency to select layer 3, and the upper surface of glue-line 2 is covered with epiphragma layer 4；The frequency selects layer 3 for equipment
Electromagnetic protection or RCS reduction are formed, base membrane layer 1 and glue-line 2 are for protecting frequency that layer 3 is selected to avoid being damaged and insulate, epiphragma layer 4
For protecting the flexibility frequency-selective surfaces integrally to avoid being damaged.In a particular application, flexible frequency-selective surfaces pass through
Gluing or fixed form are completely covered by the equipment surface for needing to carry out electromagnetic protection or RCS reduction.
It is the flexible copper foil with two-dimensional periodic structure that the frequency, which selects layer 3, can electromagnetic waveforms to special frequency channel at anti-
It penetrates or is connected, realize the reception to demand frequency range electromagnetic wave and the decaying to frequency range electromagnetic wave is inhibited.
Further, two-dimensional periodic structure is made of flexible copper clad, can pass through maturation at present in a flat state
Etching technique processing can be straight by having good flexibility after the hot-press solidifying of the solidification of glue-line 2 and base membrane layer 1 and epiphragma layer 4
Connect it is conformal after bending be covered in curved surface equipment, do not have to through cutting fragment attachment after approximate expansion, without passing through complex machines
People consumes a longer time the mechanical microfabrication of progress, with higher compared with existing curved surface frequency-selective surfaces processing technology
Machining accuracy, for end properties index closer to design objective, production method is simple, for different curve without individually fixed
System is, it can be achieved that batch production.
The two-dimensional periodic structure is prepared using engraving method, guarantees better performances after its molding.
The material of the base membrane layer 1 and epiphragma layer 4 is polyimides or polyester film.
The base membrane layer 1 is by hot-press solidifying in the lower surface of glue-line 2, and epiphragma layer 4 is by hot-press solidifying in the upper of glue-line 2
Surface.
The frequency, which selects, is evenly distributed with the identical patch of several shapes or slit on layer 3, want for meeting performance indicator
It asks.
Specifically, it is actual be uniformly distributed, the patch of periodic structure feature or slit, need performance indicator as needed
It is required that being designed, shape may be cross, hexagon, circle, rectangular etc., and slit is also not necessarily limited to through-hole, it may be possible to patch,
Gap etc..
Based on a kind of preparation method of flexible frequency-selective surfaces, as shown in Figure 3, comprising the following steps:
S1. pre-treatment: cleaning frequency selects the spot and oxide on 3 surface of layer；
S2. it pastes base membrane layer: layer 3 will be selected to be glued on base membrane layer 1 by glue-line 2 frequently；
S3. it selects layer to etch frequently: layer 3 will be selected to be made as two-dimensional periodic structure frequently by etching；
S4. it is surface-treated: to selecting 3 surface of layer to carry out anti-oxidation processing frequently；
S5. it pastes epiphragma layer: epiphragma layer 4 being glued at frequency by glue-line 2 and is selected on layer 3；
S6. it hot pressing: to the flexibility frequency-selective surfaces integral heat pressure, shapes；
S7. solidify: the flexible frequency-selective surfaces integrally curing after hot pressing carries out qualitative.
Embodiment 1
As described above, by taking certain type guided missile as an example, further illustrate using flexible frequency-selective surfaces of the present invention and
It is as follows that preparation method carries out the anti-out-of-band interference embodiment of antenna on bullet:
According to the anti-out-of-band interference demand of antenna on bullet, design frequency selects the two-dimensional periodic structure and base membrane layer 1, glue of layer 3
Layer 2, the thickness for selecting layer 3 and epiphragma layer 4 frequently, to selecting layer 3 to carry out pre-treatment S1 frequently, cleaning frequency selects 3 surface blot of layer, oxide,
By pasting basement membrane S2, layer 3 will be selected to be glued on base membrane layer 1 by glue-line 2 frequently, by selecting layer to etch S3 frequently, lost on selecting layer 3 frequently
The two-dimensional periodic structure designed is carved, by improving the inoxidizability that frequency selects layer 3 to selecting layer 3 to carry out surface treatment S4 frequently,
Epiphragma layer 4 is glued at frequency by glue-line 2 by pasting epiphragma S5 to select on layer 3, by hot pressing S6 and solidifying S7 for the soft of production
Resistant frequency selects surface shape, is qualitative, and the antenna area size then protected according to antenna on bullet is soft to what is made
Resistant frequency selection surface is cut, and the flexible frequency-selective surfaces cut are attached to antenna by way of pasting or fixing
Or antenna house surface, realize the anti-out-of-band interference of antenna on bullet.
Embodiment 2
As described previously for certain equipment surface for needing to carry out RCS reduction, demand, design frequency are reduced according to the RCS of equipment
The two-dimensional periodic structure and base membrane layer 1, glue-line 2, the thickness for selecting layer 3 and epiphragma layer 4 frequently for selecting layer 3, to select frequently layer 3 carry out
Pre-treatment S1, cleaning frequency select 3 surface blot of layer, oxide, by pasting basement membrane S2, layer 3 will be selected to be glued at basement membrane by glue-line 2 frequently
On layer 1, by selecting layer to etch S3 frequently, the two-dimensional periodic structure that is designed is etched on selecting layer 3 frequently, by selecting layer 3 frequently
Surface treatment S4 is carried out, the inoxidizability that frequency selects layer 3 is improved, epiphragma layer 4 is glued at frequency by glue-line 2 by pasting epiphragma S5
It selects on layer 3, by hot pressing S6 and solidify S7 for the flexible frequency-selective surfaces of production setting, qualitative, then according to equipping surface
Size, the flexible frequency-selective surfaces made are cut into corresponding size and shape, by the flexible frequency cut select
Surface is attached to equipment surface by way of stickup, realizes the RCS reduction of equipment.
Claims (7)
1. a kind of flexibility frequency-selective surfaces, including glue-line (2), it is characterised in that: the lower surface of the glue-line (2) is covered with base
Film layer (1), the interior solidification of glue-line (2) have frequency to select layer (3), and the upper surface of glue-line (2) is covered with epiphragma layer (4)；The frequency selects layer (3)
For forming electromagnetic protection or RCS reduction to equipment, base membrane layer (1) and glue-line (2) are for protecting frequency that layer (3) is selected to avoid being damaged
Insulation is injured, epiphragma layer (4) is for protecting the flexibility frequency-selective surfaces integrally to avoid being damaged.
2. flexibility frequency-selective surfaces as described in claim 1, it is characterised in that: it is with two-dimentional week that the frequency, which selects layer (3),
The flexible copper foil of phase property structure.
3. flexibility frequency-selective surfaces as claimed in claim 2, it is characterised in that: the two-dimensional periodic structure is using etching
Method preparation.
4. flexibility frequency-selective surfaces as described in claim 1, it is characterised in that: the base membrane layer (1) and epiphragma layer (4)
Material is polyimides or polyester film.
5. flexibility frequency-selective surfaces as described in claim 1, it is characterised in that: the base membrane layer (1) passes through hot-press solidifying
In the lower surface of glue-line (2), epiphragma layer (4) is by hot-press solidifying in the upper surface of glue-line (2).
6. flexibility frequency-selective surfaces as described in claim 1, it is characterised in that: the frequency selects to be evenly distributed on layer (3)
The identical patch of several shapes or slit.
7. a kind of preparation method of flexibility frequency-selective surfaces, it is characterised in that: the following steps are included:
S1. pre-treatment: cleaning frequency selects the spot and oxide on layer (3) surface；
S2. it pastes base membrane layer: layer (3) will be selected to be glued on base membrane layer (1) by glue-line (2) frequently；
S3. it selects layer to etch frequently: layer (3) will be selected to be made as two-dimensional periodic structure frequently by etching；
S4. it is surface-treated: to selecting layer (3) surface to carry out anti-oxidation processing frequently；
S5. it pastes epiphragma layer: epiphragma layer (4) being glued at frequency by glue-line (2) and are selected on layer (3)；
S6. it hot pressing: to the flexibility frequency-selective surfaces integral heat pressure, shapes；
S7. solidify: the flexible frequency-selective surfaces integrally curing after hot pressing carries out qualitative.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910309529.4A CN110053315A (en) | 2019-04-17 | 2019-04-17 | A kind of flexibility frequency-selective surfaces and preparation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910309529.4A CN110053315A (en) | 2019-04-17 | 2019-04-17 | A kind of flexibility frequency-selective surfaces and preparation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110650603A (en) * | 2019-09-10 | 2020-01-03 | Oppo广东移动通信有限公司 | Housing assembly and electronic device |
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| CN209999786U (en) * | 2019-04-17 | 2020-01-31 | 江南机电设计研究所 | kinds of flexible frequency selective surface |
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2019
- 2019-04-17 CN CN201910309529.4A patent/CN110053315A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110650603A (en) * | 2019-09-10 | 2020-01-03 | Oppo广东移动通信有限公司 | Housing assembly and electronic device |
| CN110650603B (en) * | 2019-09-10 | 2021-06-08 | Oppo广东移动通信有限公司 | Housing assembly and electronic device |
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