CN211719750U - Cavity filter, cover plate thereof and communication equipment - Google Patents
Cavity filter, cover plate thereof and communication equipment Download PDFInfo
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- CN211719750U CN211719750U CN201921729387.9U CN201921729387U CN211719750U CN 211719750 U CN211719750 U CN 211719750U CN 201921729387 U CN201921729387 U CN 201921729387U CN 211719750 U CN211719750 U CN 211719750U
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- cavity filter
- cavity
- cover plate
- plastic body
- apron
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Abstract
The utility model provides a cavity filter and apron and including communication equipment of this cavity filter, this cavity filter include cavity and apron, and the apron passes through welding mode or the fixed mode closing cap cavity of screw, and wherein, cavity filter's apron includes the plastic body and adheres to the conducting layer on plastic body surface. The utility model provides a cavity filter and apron and including this cavity filter's communication equipment is through will lapping on with tuning screw rod complex part design for plastic material, can reduce the manufacturing cost and the product weight of apron and can not produce the piece from this.
Description
Technical Field
The utility model relates to the field of communication technology, concretely relates to cavity filter and apron and including this cavity filter's communication equipment.
Background
In a base station system for mobile communication, communication signals carrying communication data in a specific frequency range are generally transmitted through a transmitting antenna, and the communication signals are received through a receiving antenna. The signal received by the receiving antenna contains not only the communication signal carrying the communication data within the specific frequency range, but also a number of spurious or interfering signals outside the specific frequency range. To obtain a communication signal carrying communication data in a specific frequency range transmitted by a transmitting antenna from a signal received by a receiving antenna, the signal received by the receiving antenna is usually filtered by a cavity filter, so as to filter out noise or interference signals outside the specific frequency of the communication signal carrying communication data.
The cavity filter is widely used as a frequency selection device. In the prior art, a cavity filter includes a cavity, a cover plate, a resonant rod, and a tuning screw, wherein the cover plate covers the cavity to form a resonant cavity, the resonant rod is fixed on the bottom surface of the cavity by a screw, and the tuning screw extends into the resonant rod to adjust radio frequency parameters.
The cover plate of the existing cavity filter is generally formed by a metal plate through multiple processes of die casting, stamping, machining, grinding, silver electroplating and the like, and the manufacture is relatively inefficient and time-consuming.
The metal material cost is higher, the product is heavier, the processing difficulty is big, the product leakproofness is influenced because the deformation that the metal heat conduction efficiency is good and the easy production is not required during the welding, and the silver-plating in the screw hole on the metal cover plate can take place to drop and lead to the piece to fall into the cavity and cause the product index bad when tuning screw and apron are closed soon.
SUMMERY OF THE UTILITY MODEL
The utility model provides a cavity filter and apron and including this cavity filter's communication equipment to silver-plating in the threaded hole on the metal covering plate can take place to drop and lead to the piece to fall into the interior bad technical problem of product index that causes of cavity when harmonious screw rod closes with the apron soon among the solution prior art.
In order to solve the technical problem, the utility model discloses a technical scheme be: the cover plate of the cavity filter comprises a plastic body and a conductive layer attached to the surface of the plastic body.
According to an embodiment of the present invention, the conductive layer is a silver plating layer and attached to a surface of the plastic body.
According to the utility model discloses an embodiment, the plastic body forms through the mode of moulding plastics.
According to the utility model discloses an embodiment, the plastic body is equipped with and link up the tuning screw of plastic body thickness direction.
According to the utility model discloses an embodiment, it is provided with a plurality of fixed orificess to distribute on the plastic body.
According to the utility model discloses an embodiment, the material of plastic body is PEI.
According to an embodiment of the present invention, the plastic body is doped with glass fibers.
According to an embodiment of the present invention, the glass fiber accounts for 5% to 10% of the plastic body.
In order to solve the technical problem, the utility model discloses a technical scheme be: there is provided a cavity filter comprising:
a cavity;
the cover plate covers the cavity in a welding mode or a screw fixing mode.
In order to solve the technical problem, the utility model discloses a technical scheme be: a communication device is provided, which includes the cavity filter, and the communication device is at least one of a duplexer, a simplex, a splitter, a combiner, or a tower top amplifier.
The utility model has the advantages that: be different from prior art's condition, the utility model provides a cavity filter and apron and including this cavity filter's communication equipment is through will lapping on with tuning screw complex part design for plastic material, can reduce the manufacturing cost and the product weight of apron and can not produce the piece from this.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:
fig. 1 is a schematic partial cross-sectional structure diagram of a cover plate of a cavity filter according to a first embodiment of the present invention;
fig. 2 is a schematic top view of a cover plate of a cavity filter according to a first embodiment of the present invention;
fig. 3 is a schematic partial cross-sectional structure diagram of a cover plate of a cavity filter according to a second embodiment of the present invention;
fig. 4 is a schematic top view of a cover plate of a cavity filter according to a second embodiment of the present invention;
fig. 5a to 5c are schematic diagrams illustrating a cover plate modification of a cavity filter according to a second embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1 and fig. 2 together, fig. 1 is a schematic partial cross-sectional structure diagram of a cover plate of a cavity filter according to a first embodiment of the present invention, and fig. 2 is a schematic top view structure diagram of the cover plate of the cavity filter according to the first embodiment of the present invention.
The first embodiment of the present invention provides a cover plate 100 of a cavity filter, the cover plate 100 of the cavity filter includes a plastic body 110 and a conductive layer (not shown) attached to the surface of the plastic body 110.
The conductive layer can be a silver plating layer and is attached to a surface of the plastic body 110, the surface is a surface facing the cavity (not shown) (i.e., an inner surface that is fastened with the cavity in a use state), and of course, the silver plating layer can also be replaced by other materials with better conductive performance.
The embodiment of the utility model provides an in, the mode of moulding plastics of plastic body 110 accessible directly forms, and the processing technology that the mode of moulding plastics formed is simple, high-efficient, convenient, and material cost is lower, product weight reduction, because the relatively poor difficult deformation that takes place of plastic heat conductivity during the welding guarantees the leakproofness of cavity filter product easily.
The plastic body 110 is provided with a tuning screw hole 112 penetrating through the thickness direction of the plastic body 110, the tuning screw hole 112 can be directly formed by injection molding or formed by a subsequent tapping mode, the tuning screw hole 112 is used for being spirally matched with the tuning screw 130, and the plastic body 110 is further provided with a nut 140 matched with the tuning screw 130.
In this embodiment, the plastic body 110 is further provided with a plurality of fixing holes 114, the fixing holes 114 can be directly formed by injection molding, the fixing holes 114 are used for the fixing screws 150 to pass through, the fixing screws 150 are used for fixing the cover plate 100 on the cavity, and correspondingly, the cavity is provided with a plurality of receiving holes for receiving the fixing screws 150 to be screwed in.
In this embodiment, the plastic body 110 is made of PEI (Polyetherimide), wherein the plastic body 110 is doped with glass fibers, the ratio of the glass fibers in the plastic body 110 is 5% to 10%, and the glass fibers can improve the mechanical strength of the plastic body 110 and the service life of the plastic body 110.
The utility model also provides a cavity filter, cavity filter include cavity and aforementioned apron 100, and apron 100 is through welding mode or the fixed mode closing cap cavity of screw.
The utility model also provides a communication equipment, communication equipment include aforementioned cavity filter, and communication equipment is at least one of duplexer, simplex ware, branching unit, combiner or tower amplifier.
Referring to fig. 3 to 5c, fig. 3 is a schematic partial cross-sectional structure view of a cover plate of a cavity filter according to a second embodiment of the present invention; fig. 4 is a schematic top view of a cover plate of a cavity filter according to a second embodiment of the present invention; fig. 5a to 5c are schematic diagrams illustrating a cover plate modification of a cavity filter according to a second embodiment of the present invention.
The second embodiment of the present invention provides a cover plate 200 of a cavity filter, the cover plate 200 of the cavity filter includes a metal body 210 and a plastic part 220 disposed in the metal body 210, the plastic part 220 is used for setting a tuning screw hole 222.
Wherein, plastic part 220 accessible injection moulding mode directly forms, and the processing technology who adopts the mode of moulding plastics to form is simple, high-efficient, convenient, and tuning screw 222 accessible injection moulding directly forms, or forms through subsequent tapping mode, and tuning screw 222 is used for with tuning screw 230 screw fit, further is equipped with on the plastic part 220 with tuning screw 230 complex nut 240.
In this embodiment, a plurality of fixing holes 216 are further distributed on the metal body 210, the fixing holes 216 may be directly formed by injection molding or formed by a subsequent drilling process, the fixing holes 216 are used for allowing the fixing screws 250 to pass through, the fixing screws 250 are used for fixing the cover plate 200 on a cavity (not shown), and correspondingly, the cavity is provided with a plurality of receiving holes for receiving the fixing screws 250 to be screwed in.
The plastic part 220 may be directly formed in the metal body 210 by injection molding. Alternatively, the plastic part 220 may be formed in the metal body 210 by an extrusion insert method.
Specifically, the metal body 210 is provided with a plastic mounting hole 212 penetrating through the metal body 210 in the thickness direction, and the plastic member 220 is disposed in the plastic mounting hole 212.
Preferably, the plastic setting hole 212 has a certain limit function for the plastic part 220, and the plastic setting hole 212 may be in a step hole shape, and includes an axial annular wall 213, an annular table wall 214 vertically connected to the axial annular wall 213, and a conical annular wall 215 connected to the annular table wall 214 at an acute angle, wherein an included angle between the annular table wall 214 and the conical annular wall 215 may be 80 degrees, 75 degrees, 70 degrees, and the like, so that the plastic part 220 is hard to fall off after being disposed in the plastic setting hole 212. Of course, the plastic setting hole 212 may have other shapes, such as a V-shaped, W-shaped, wave-shaped, and other non-optical inner wall as shown in fig. 5a to 5 c.
In addition, the outline of the plastic part 220 is usually slightly larger than the plastic setting hole 212, and the plastic part 220 and the metal body 210 can be firmly combined by being inserted into the plastic setting hole 212 through a forced extrusion method.
In this embodiment, the plastic part 220 is made of PEI (Polyetherimide), wherein the plastic part 220 is doped with glass fibers, the ratio of the glass fibers in the plastic part 220 is 5% to 10%, and the glass fibers can improve the mechanical strength of the plastic part 220 and the service life of the plastic part 220.
After the plastic part 220 with the tuning screw hole 222 is disposed on the metal body 210, and then the metal body 210 is silver-plated, the silver-plated layer will only adhere to the surface of the metal body 210, will not adhere to the plastic part 220, and will not adhere to the inner wall of the screw thread of the tuning screw hole 222, so that the debris problem described in the background art will not occur. It should be noted that there are many kinds of silver plating processes, the silver plating process adopted in this embodiment can only plate silver on a metal surface, but not on a plastic surface, and the silver plating process adopted in the first embodiment can plate silver on a plastic surface.
The utility model also provides a cavity filter, cavity filter include cavity and aforementioned apron 200, and apron 200 passes through welding mode or the fixed mode closing cap cavity of screw.
The utility model also provides a communication equipment, communication equipment include aforementioned cavity filter, and communication equipment is at least one of duplexer, simplex ware, branching unit, combiner or tower amplifier.
In view of the above, it is easily understood by those skilled in the art that the present invention provides a cavity filter and a cover plate 100(200) thereof and a communication device including the cavity filter, by designing the portion of the cover plate 100(200) that cooperates with the tuning screw 130(230) as a plastic material, the production cost and the product weight of the cover plate 100(200) can be reduced without generating debris.
The above is only the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.
Claims (7)
1. The cover plate of the cavity filter is characterized by comprising a plastic body and a conductive layer attached to the surface of the plastic body;
the conducting layer is a silver coating and is attached to one surface of the plastic body.
2. The decking of claim 1, wherein the plastic body is formed by injection molding.
3. The cover plate according to claim 1, wherein the plastic body is provided with tuning screw holes penetrating through the plastic body in a thickness direction.
4. The cover plate as claimed in claim 1, wherein the plastic body has a plurality of fixing holes distributed thereon.
5. The cover sheet according to claim 1, wherein the plastic body is made of PEI.
6. A cavity filter, comprising:
a cavity;
the cover plate of any one of claims 1 to 5, which covers the cavity by welding or screw-fixing.
7. A communication device comprising the cavity filter of claim 6, the communication device being at least one of a duplexer, a simplex, a splitter, a combiner, or a tower top amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921729387.9U CN211719750U (en) | 2019-10-15 | 2019-10-15 | Cavity filter, cover plate thereof and communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921729387.9U CN211719750U (en) | 2019-10-15 | 2019-10-15 | Cavity filter, cover plate thereof and communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211719750U true CN211719750U (en) | 2020-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921729387.9U Active CN211719750U (en) | 2019-10-15 | 2019-10-15 | Cavity filter, cover plate thereof and communication equipment |
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| CN (1) | CN211719750U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112670684A (en) * | 2019-10-15 | 2021-04-16 | 深圳市大富科技股份有限公司 | Cavity filter, cover plate thereof and communication equipment |
-
2019
- 2019-10-15 CN CN201921729387.9U patent/CN211719750U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112670684A (en) * | 2019-10-15 | 2021-04-16 | 深圳市大富科技股份有限公司 | Cavity filter, cover plate thereof and communication equipment |
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Address after: 233000 building 4, national financial incubation Industrial Park, 17 Yannan Road, high tech Zone, Bengbu City, Anhui Province Patentee after: Dafu Technology (Anhui) Co., Ltd Address before: 518104 First, Second and Third Floors of A1, A2, A3 101, A4 of Shajing Street, Shajing Street, Baoan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd. |
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