CN105322257A - Cover board of cavity filter - Google Patents
Cover board of cavity filter Download PDFInfo
- Publication number
- CN105322257A CN105322257A CN201510785156.XA CN201510785156A CN105322257A CN 105322257 A CN105322257 A CN 105322257A CN 201510785156 A CN201510785156 A CN 201510785156A CN 105322257 A CN105322257 A CN 105322257A
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- Prior art keywords
- cover board
- tuning
- cavity
- filter
- board body
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Abstract
The invention discloses a cover board of a cavity filter. The cover board is used for closing a cavity of the cavity filter, and comprises a cover board body, wherein the cover board body is made of an aluminum material; a tuning threaded hole is formed in the cover board body; the tuning threaded hole specifically is a lug boss which extends towards the direction of the cavity and is molded integrally with the cover board body; the middle part of the lug boss is hollow; a threaded hole is formed in the lug boss along the direction of the axis direction; a tuning hole which is connected with the threaded hole is also formed in the lug boss along the axis direction; the tuning hole is closer to the cavity of the filter than the threaded hole; an annular elastic metal sheet is arranged in the tuning hole; and the diameter of the tuning hole is smaller than that of the tuning self-locking bolt of the filter. According to the cover board of the cavity filter, the cost and the tuning performance are considered; and resources are saved.
Description
Technical field
The present invention relates to signal transacting field, particularly relate to a kind of cavity filter cover board.
Background technology
At present, the signal transacting of cavity body filter has been come by the tuning Self-locking screw on filter cover board usually, the problem of tuning screw process is the problem of signal intermodulation in general, specifically refers to two different frequency signals, superposes and the signal of the new frequency of generation in a certain system.
Current common filter comprises cavity, the parts such as cover plate and tuning Self-locking screw, filter cover board mostly adopts mode at sheet material upper punch pressing hole-forming tubular drill to process tuned window now, it is high that the mode of one side punching press processes screwed hole defect rate, too high manufacturing cost, the tuned window stamped out on the other hand also needs to install tuning swivel nut in addition, tuning swivel nut adopts welding, press, the mode such as gluing is fixed on tuned window, the installation of tuning swivel nut not only needs cost of labor and processing cost, simultaneously, this tuning swivel nut installed additional in addition on tuned window is also unstable, just easily produce through after a period of time and loosen, and the also also out-of-flatness of the interface of tuned window and tuning swivel nut, the tuning effect that final impact is actual.
Summary of the invention
The present invention aims to provide a kind of cavity filter cover board.
For solving the problems of the technologies described above, the present invention by the following technical solutions, a kind of cavity filter cover board, described cover plate is used for the cavity of capping cavity body filter, cover plate comprises cover board body, cover board body adopts aluminium, described cover board body is provided with tuning screwed hole, tuning screwed hole is specially the boss integrated with cover board body extended to cavity direction, the mid portion hollow of boss, boss inside is provided with screwed hole along its axis direction, described boss inside is also provided with along its axis direction the tuned window connected with screwed hole, this tuned window is relative to the cavity of screwed hole closer to filter, tuned window inside is provided with cyclic spring sheet metal, the diameter of sheet metal is less than the diameter of filter tuner Self-locking screw.
As preferably, the thickness of described cover board body is 0.8-3.5mm.
As preferably, the height of described boss is 1-20mm.
As preferably, the swivel nut that described boss internal thread holes is formed is suitable for the tuning Self-locking screw of M4-M10 specification.
As preferably, described cyclic spring sheet metal is cyclic spring copper sheet.
As preferably, described cyclic spring sheet metal contacts with the tuning Self-locking screw of filter.
As preferably, described cover board body is also provided with cover screw hole.
Relative to traditional filter cover board, the present invention all adopts aluminium to be used as the material of cover board body, because aluminium is relatively cheap on the one hand, use aluminium to manufacture cover plate and greatly can save material cost, the quality of aluminium is softer on the other hand, processing is got up easily, also save processing cost, consider the actual demand that present filter is tuning, the specification of tuning Self-locking screw is M4-M10 at present, and accordingly, the aluminium extensibility adopted due to cover plate is better, the thickness of cover plate only need control at 0.8-3.5mm, cover plate is light and do not affect result of use, save material cost further, the height of boss also can control at 1-20mm, be enough to the instructions for use meeting Self-locking screw, in addition, cover plate of the present invention be also provided with that namely tuning screwed hole extend to cavity direction with the boss of the integrated mid portion hollow of cover board body, and the present invention uses boss to replace the combination of traditional tuned window and tuning swivel nut, only need stretch to cover board body because process boss, use lathe just automatically can complete the processing of tuning screwed hole, operation need not be overlapped again additionally by stamping out tuned window and fixing tuning swivel nut two, and this tuning screwed hole is by the materials processing of cover board body out, the present invention also can not waste material while saving operation, and integrated boss is very firm, tuning effect can not be affected, boss inside of the present invention is also provided with along its axis direction the tuned window connected with screwed hole, this tuned window is relative to the cavity of screwed hole closer to filter, tuned window inside is provided with cyclic spring sheet metal, the diameter of sheet metal is less than the diameter of filter tuner Self-locking screw, electric capacity is formed between the inwall of annular sheet metal and tuning screw, make effect cover plate being introduced capacity plate antenna, reduce the current density of tuning screw and cover plate binding site, reduce the inter-modulated signal level because tuning screw and cover plate loose contact produce, improve the intermodulation first-pass yield of cavity body filter, and adopt flexible sheet metal to be depart from the front end of screw when screwed hole enters tuning porose area to squeeze elastic sheet metal downwards, sheet metal is because the effect of elastic force inwardly extrudes and can pin Self-locking screw better, consider the factor of cost and efficiency, preferably adopt cyclic spring copper sheet further, because cost is lower on the one hand for copper, there is good elasticity on the other hand.
Accompanying drawing explanation
The schematic diagram of Fig. 1 to be the present invention be embodiment;
Fig. 2 is the schematic diagram of the tuning swivel nut of the present invention.
In figure: 1, cover board body; 2, boss; 3, screwed hole; 4, tuned window; 5, cover screw hole; 6, cyclic spring sheet metal.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
Referring to Fig. 1 to Fig. 2, a kind of cavity filter cover board according to the embodiment of the present invention is described, described cover plate is used for the cavity of capping cavity body filter, cover plate comprises cover board body 1, cover board body 1 adopts aluminium, described cover board body 1 is provided with tuning screwed hole, tuning screwed hole is specially the boss 2 integrated with cover board body 1 extended to cavity direction, the mid portion hollow of boss 2, boss 2 inside is provided with screwed hole 3 along its axis direction, described boss 2 inside is also provided with the tuned window 4 connected with screwed hole 3 along its axis direction, this tuned window 4 is relative to the cavity of screwed hole 3 closer to filter, tuned window 4 inside is provided with cyclic spring sheet metal 6, the diameter of sheet metal 6 is less than the diameter of filter tuner Self-locking screw.
As preferably, the thickness of described cover board body 1 is 0.8-3.5mm.
As preferably, the height of described boss 2 is 1-20mm.
As preferably, the swivel nut that described boss 2 internal thread holes is formed is suitable for the tuning Self-locking screw of M4-M10 specification.
As preferably, described cyclic spring sheet metal 6 is cyclic spring copper sheet.
As preferably, described cyclic spring sheet metal 6 contacts with the tuning Self-locking screw of filter.
As preferably, described cover board body 1 is also provided with cover screw hole 5.
Relative to traditional filter cover board, the present invention all adopts aluminium to be used as the material of cover board body, because aluminium is relatively cheap on the one hand, use aluminium to manufacture cover plate and greatly can save material cost, the quality of aluminium is softer on the other hand, processing is got up easily, also save processing cost, consider the actual demand that present filter is tuning, the specification of tuning Self-locking screw is M4-M10 at present, and accordingly, the aluminium extensibility adopted due to cover plate is better, the thickness of cover plate only need control at 0.8-3.5mm, cover plate is light and do not affect result of use, save material cost further, the height of boss also can control at 1-20mm, be enough to the instructions for use meeting Self-locking screw, in addition, cover plate of the present invention be also provided with that namely tuning screwed hole extend to cavity direction with the boss of the integrated mid portion hollow of cover board body, and the present invention uses boss to replace the combination of traditional tuned window and tuning swivel nut, only need stretch to cover board body because process boss, use lathe just automatically can complete the processing of tuning screwed hole, operation need not be overlapped again additionally by stamping out tuned window and fixing tuning swivel nut two, and this tuning screwed hole is by the materials processing of cover board body out, the present invention also can not waste material while saving operation, and integrated boss is very firm, tuning effect can not be affected, boss inside of the present invention is also provided with along its axis direction the tuned window connected with screwed hole, this tuned window is relative to the cavity of screwed hole closer to filter, tuned window inside is provided with cyclic spring sheet metal, the diameter of sheet metal is less than the diameter of filter tuner Self-locking screw, electric capacity is formed between the inwall of annular sheet metal and tuning screw, make effect cover plate being introduced capacity plate antenna, reduce the current density of tuning screw and cover plate binding site, reduce the inter-modulated signal level because tuning screw and cover plate loose contact produce, improve the intermodulation first-pass yield of cavity body filter, and adopt flexible sheet metal to be depart from the front end of screw when screwed hole enters tuning porose area to squeeze elastic sheet metal downwards, sheet metal is because the effect of elastic force inwardly extrudes and can pin Self-locking screw better, consider the factor of cost and efficiency, preferably adopt cyclic spring copper sheet further, because cost is lower on the one hand for copper, there is good elasticity on the other hand.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (7)
1. a cavity filter cover board, described cover plate is used for the cavity of capping cavity body filter, cover plate comprises cover board body, it is characterized in that, cover board body adopts aluminium, described cover board body is provided with tuning screwed hole, tuning screwed hole is specially the boss integrated with cover board body extended to cavity direction, the mid portion hollow of boss, boss inside is provided with screwed hole along its axis direction, described boss inside is also provided with along its axis direction the tuned window connected with screwed hole, this tuned window is relative to the cavity of screwed hole closer to filter, tuned window inside is provided with cyclic spring sheet metal, the diameter of sheet metal is less than the diameter of filter tuner Self-locking screw.
2. cavity filter cover board according to claim 1, is characterized in that, the thickness of described cover board body is 0.8-3.5mm.
3. cavity filter cover board according to claim 1, is characterized in that, the height of described boss is 1-20mm.
4. the cavity filter cover board according to Claims 2 or 3, is characterized in that, the swivel nut that described boss internal thread holes is formed is suitable for the tuning Self-locking screw of M4-M10 specification.
5. cavity filter cover board according to claim 1, is characterized in that, described cyclic spring sheet metal is cyclic spring copper sheet.
6. cavity filter cover board according to claim 1 or 5, it is characterized in that, described cyclic spring sheet metal contacts with the tuning Self-locking screw of filter.
7. cavity filter cover board according to claim 1, is characterized in that, described cover board body is also provided with cover screw hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510785156.XA CN105322257A (en) | 2015-11-17 | 2015-11-17 | Cover board of cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510785156.XA CN105322257A (en) | 2015-11-17 | 2015-11-17 | Cover board of cavity filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105322257A true CN105322257A (en) | 2016-02-10 |
Family
ID=55249182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510785156.XA Pending CN105322257A (en) | 2015-11-17 | 2015-11-17 | Cover board of cavity filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105322257A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140292446A1 (en) * | 2013-03-29 | 2014-10-02 | Hon Hai Precision Industry Co., Ltd. | Cavity filter |
| CN204156069U (en) * | 2014-11-24 | 2015-02-11 | 深圳市欣天科技股份有限公司 | A kind of cavity body filter |
| CN204632892U (en) * | 2014-12-31 | 2015-09-09 | 深圳市大富科技股份有限公司 | Cavity body filter, duplexer and radio frequency remote equipment |
| CN205609714U (en) * | 2015-11-17 | 2016-09-28 | 强胜精密机械(苏州)有限公司 | Cavity filter cover plate |
-
2015
- 2015-11-17 CN CN201510785156.XA patent/CN105322257A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140292446A1 (en) * | 2013-03-29 | 2014-10-02 | Hon Hai Precision Industry Co., Ltd. | Cavity filter |
| CN204156069U (en) * | 2014-11-24 | 2015-02-11 | 深圳市欣天科技股份有限公司 | A kind of cavity body filter |
| CN204632892U (en) * | 2014-12-31 | 2015-09-09 | 深圳市大富科技股份有限公司 | Cavity body filter, duplexer and radio frequency remote equipment |
| CN205609714U (en) * | 2015-11-17 | 2016-09-28 | 强胜精密机械(苏州)有限公司 | Cavity filter cover plate |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160210 |
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| RJ01 | Rejection of invention patent application after publication |