CN105304987B - A kind of cavity body filter - Google Patents
A kind of cavity body filter Download PDFInfo
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- CN105304987B CN105304987B CN201510792786.XA CN201510792786A CN105304987B CN 105304987 B CN105304987 B CN 105304987B CN 201510792786 A CN201510792786 A CN 201510792786A CN 105304987 B CN105304987 B CN 105304987B
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Abstract
A kind of cavity body filter, including cavity, cover board and tuning Self-locking screw, the cover board is used to cover the cavity of cavity body filter, cover board includes cover board body, cover board body uses aluminium, the cover board body is equipped with tuning threaded hole, tuning threaded hole be specially extend to cavity direction with the integrally formed boss of cover board body, tuning Self-locking screw is divided into head and bar portion, Self-locking screw is made using copper, screw one end is head, the other end is bar portion, the head of screw is equipped with screw thread and forms screw, the screw thread is equipped with two sets, the diameter L and pitch P of upper and lower two external threading are identical, section diameter between two screw threads is 40%-the 70% of gauge diameter, the filter that the present invention designs takes into account cost and tuning performance.
Description
Technical field
The present invention relates to field of signal processing more particularly to a kind of cavity body filters.
Background technology
Currently, the signal processing of cavity body filter is usually completed by the tuning Self-locking screw on filter cover board, generally
For tuning screw handle the problem of be signal intermodulation the problem of, in particular to two different frequency signals, in a certain system
The signal of the new frequency of superposition and generation.
Current common filter includes the components such as cavity, cover board and tuning Self-locking screw, and filter cover board is now mostly
Tuned window is processed by the way of the punching press pore-forming on plank, on the one hand processes threaded hole defect rate with the mode of punching press
Height, too high manufacturing cost, the tuned window on the other hand stamped out also need additionally mounted upper tuning swivel nut, and tuning swivel nut is using weldering
Connect, press, the modes such as gluing are fixed on tuned window, the installation for tuning swivel nut not only needs cost of labor and processing cost, together
When, this tuning swivel nut in addition installed additional on tuned window is simultaneously unstable, is easy for generating loosening after a period of time, and
The interface also simultaneously out-of-flatness of tuned window and tuning swivel nut, finally influences actual tuning effect.
Invention content
The present invention is intended to provide a kind of cavity filter cover board.
In order to solve the above technical problems, the present invention uses following technical scheme, a kind of cavity body filter, including cavity, lid
Plate and tuning Self-locking screw, the cover board use aluminium, the cover board body to be equipped with for covering cavity filtering cover board body
Tune threaded hole, tuning threaded hole be specially extend to cavity direction with the integrally formed boss of cover board body, in boss
Between part it is hollow, be equipped with threaded hole along its axis direction inside boss, be additionally provided with along its axis direction inside the boss and spiral shell
The tuned window that pit connects, for the tuned window relative to threaded hole closer to the cavity of filter, tuned window is internally provided with annular elastomeric
Property sheet metal, the diameter of sheet metal is less than the cavity of the diameter device of filter tuner Self-locking screw, and cover board includes cover board body,；
Tuning Self-locking screw is divided into head and bar portion, and Self-locking screw is made using copper, and screw one end is head, and the other end is bar
Portion, bar portion stretch into tuned radio frequency parameter in the cavity of filter, and Self-locking screw is fixed on the cover board of filter by head, head
Top is equipped with for receiving screwdriver and so that tuning screw is screwed in the receiving inside cavity body filter according to the driving of the screwdriver
Slot, the head of screw are equipped with screw thread and form screw, which is equipped with two sections, the diameter >=M4 for the screw that screw thread is formed, two sections of spiral shells
It between line and is not attached to, the diameter L and pitch P of two sections screw thread are identical, and upper screw thread in the axial direction can with lower screw thread
A displacement is generated, displacement S is set as screw thread and originally extended downwardly location and practical lower screw position production
The size of raw deviation, the displacement S is 0.1P -0.8P, and the section diameter between two screw threads is gauge diameter
40%—70%。
Preferably, the thickness of the cover board body is 0.8-3.5mm.
Preferably, the height of the boss is 1-20mm.
Preferably, the swivel nut that the boss internal thread holes are formed is applicable in the tuning Self-locking screw of M4-M10 specifications.
Preferably, the cyclic spring sheet metal is cyclic spring copper sheet.
Preferably, the cyclic spring sheet metal is in contact with the tuning Self-locking screw of filter.
Preferably, being additionally provided with cover screw hole on the cover board body, cover board passes through the screw across cover screw hole
It is fixed on cavity.
Preferably, finish≤0.8 for the copper that Self-locking screw uses, the copper material for making Self-locking screw is H65.
Preferably, the spacing between described two screw threads is 0.1-2mm.
Preferably, receiving channel is interior hexagonal, screw head is evenly distributed with six bar grooves around the part of receiving channel and prolongs
It extends to inside receiving channel.
Relative to traditional cavity body filter, the present invention is all used as the material of cover board body using using aluminium, and one
Aspect is can greatly to save material cost, the matter of another aspect aluminium using aluminium to manufacture cover board because aluminium is relatively cheap
Ground is softer, and it is easy that processing is got up, and also saves processing cost, it is contemplated that the actual demand of present filter tuning tunes self-locking
The specification of screw is M4-M10 at present, and accordingly, since the aluminium extensibility that cover board uses is preferable, the thickness of cover board need to only control
0.8-3.5mm, cover board is light and does not influence using effect, further saves material cost, the height of boss can also
Control is in 1-20mm, it is sufficient to meet the requirement of Self-locking screw；In addition, the cover board of the present invention is also provided with tuning threaded hole i.e.
The boss hollow with the integrally formed middle section of cover board body extended to cavity direction, and the present invention is replaced using boss
The combination of traditional tuned window and tuning swivel nut is that need to only be stretched to cover board body because processing boss, uses
Lathe can be automatically performed the processing of tuning threaded hole, without still further by stamping out tuned window and fixed two sections of swivel nut of tuning
Process, and the tuning threaded hole is processed by the material of cover board body, the present invention while saving process also not
Material can be wasted, and integrally formed boss is very firm, not interfere with the effect of tuning；Along its axis inside boss of the present invention
Direction is additionally provided with the tuned window to connect with threaded hole, and the tuned window is relative to threaded hole closer to the cavity of filter, tuned window
It is internally provided with cyclic spring sheet metal, the diameter of sheet metal is less than the diameter of filter tuner Self-locking screw, annular sheet metal
Capacitance is formed between inner wall and tuning screw so that be able to introduce the effect of capacity plate antenna on cover board, reduce tuning screw and lid
The current density of plate binding site reduces the inter-modulated signal level because of tuning screw and cover board poor contact generation, improves cavity
The intermodulation first-pass yield of filter, and it is to be detached from threaded hole downwards in the front end of screw to enter tuning porose area to use the sheet metal of elasticity
When squeeze elastic sheet metal, sheet metal can preferably lock Self-locking screw because the effect of elastic force inwardly squeezes, it is contemplated that at
The factor of this and efficiency further preferably uses cyclic spring copper sheet, because copper one side cost is relatively low, on the other hand has good
Elasticity；A kind of new tuning Self-locking screw has also been devised in the present invention, and the head of screw is equipped with screw thread and forms screw, which sets
There are two sections, according to the tuning range of cavity body filter and actual use demand, diameter >=M4 of the screw of screw thread formation of the present invention,
The height of corresponding screw is controlled in 1-20mm, and of the invention two sections of screw threads are simultaneously not attached to, due to the present invention using copper come
Screw is made, copper itself has good electric conductivity and ductility, and the diameter L and pitch P of two screw threads that the present invention designs
All identical, upper screw thread and lower screw thread will produce a displacement in the axial direction, displacement S be set as screw thread originally to
The lower deviation for extending location and practical lower screw position generation, the size of the displacement S is 0.1P -0.8P, due to
The presence of the offset, the power that screw head is subject to during screwdriver drives screw to screw in cavity body filter are just no longer uniformly divided
Cloth, since two screw threads form a slight dislocation, such screwdriver driving screw screws in the process inside cavity body filter
Middle screw head will produce slight deformation, because the power that screw head is subject to not is equally distributed, have certain inclined
From, and the screw threads of two dislocation can generate recovery after the extruding force by screwdriver centered on part between two screw threads
The restoring force of original shape resists the cavity of filter, to complete the self-locking of screw, simultaneously, it is contemplated that actual self-locking effect
Fruit, the section diameter between screw thread is 40%-the 70% of gauge diameter, because this section diameter has the danger of fracture when narrow
Danger, while the restoring force of two screw threads has counteracting to a certain extent, and two screw threads generate when this section diameter is wide
Extruding force again inadequate, self-locking effect unobvious, in addition, the present invention be used for manufacture screw copper material be H65, it is neither too hard, nor too soft,
Copper content can also meet the needs of tuning, and copper material finish≤0.8 ensures the friction system on screw surface and filter cover board
Number, it is ensured that self-locking effect, while not interfering with the effect of tuning again, it is contemplated that the height and diameter of screw, between two screw threads
Spacing control in 0.1-2mm, and the receiving channel of screw head is interior hexagonal, and screw head is around the portion of receiving channel
Point being evenly distributed with six bar grooves extends to inside receiving channel, this shape be more convenient the top deformation of screw with obtain it is better from
Lock effect.
Description of the drawings
Fig. 1 is the schematic diagram that the present invention is embodiment；
Fig. 2 is the schematic diagram of cover board of the present invention；
Fig. 3 is the schematic diagram of present invention tuning threaded hole；
Fig. 4 is the structural schematic diagram of present invention tuning Self-locking screw；
Fig. 5 is the partial enlarged view of present invention tuning Self-locking screw；
Fig. 6 is the sectional view of present invention tuning Self-locking screw.
In figure：1, cover board body；2, boss；3, threaded hole；4, tuned window；5, cover screw hole；6, head；7, bar portion；
8, receiving channel；9, screw thread；91, upper screw thread；92, lower screw thread；10, cavity；11, Self-locking screw.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, unless otherwise specified and limited, it should be noted that term " installation ", " connected ",
" connection " shall be understood in a broad sense, for example, it may be mechanical connection or electrical connection, can also be the connection inside two elements, it can
It, can also be indirectly connected through an intermediary to be to be connected directly.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term.
A kind of cavity body filter according to the ... of the embodiment of the present invention, including cavity 10, cover board are described referring to Fig. 1 to Fig. 6
With tuning Self-locking screw 11, the cover board is used to cover the cavity 10 of cavity body filter, and cover board includes cover board body 1, cover board sheet
Body 1 use aluminium, the cover board body 1 be equipped with tuning threaded hole, tuning threaded hole be specially extend to cavity direction with
1 integrally formed boss 2 of cover board body, the middle section of boss 2 is hollow, and threaded hole is equipped with along its axis direction inside boss 2
3, the tuned window 4 to connect with threaded hole 3 is additionally provided with along its axis direction inside the boss 2, the tuned window 4 is relative to threaded hole
3 closer to filter cavity, tuned window 4 is internally provided with cyclic spring sheet metal, and the diameter of sheet metal is less than filter tuner
The diameter of Self-locking screw 11；Tuning Self-locking screw 11 divides for head 6 and bar portion 7, and Self-locking screw 11 is made using copper, screw
11 one end are head 6, and the other end is bar portion 7, and bar portion 7 stretches into tuned radio frequency parameter in the cavity 10 of filter, and head 6 is by self-locking
Screw 11 is fixed on the cover board of filter, and 6 top of head is equipped with for receiving screwdriver and being made according to the driving of the screwdriver
Tuning screw 11 screws in the receiving channel 8 inside cavity body filter, and the head 6 of screw is equipped with screw thread 9 and forms screw, which sets
Have two sections, the diameter >=M4 for the screw that screw thread 9 is formed between two sections of screw threads 9 and is not attached to, the diameter L of two sections screw thread 9 and
Pitch P is all identical, and upper screw thread 91 will produce a displacement in the axial direction with lower screw thread 92, and displacement S is set as
Screw thread 91 originally extends downwardly the deviation that location and practical lower 92 position of screw thread generate, and the size of the displacement S is
0.1P -0.8P, the section diameter between two screw threads 9 are 40%-the 70% of gauge diameter.
Preferably, the thickness of the cover board body 1 is 0.8-3.5mm.
Preferably, the height of the boss 2 is 1-20mm.
Preferably, the swivel nut that 2 internal thread holes 3 of the boss are formed is applicable in the tuning Self-locking screw of M4-M10 specifications.
Preferably, the cyclic spring sheet metal is cyclic spring copper sheet.
Preferably, the cyclic spring sheet metal is in contact with the tuning Self-locking screw 11 of filter.
Preferably, being additionally provided with cover screw hole 5 on the cover board body 1, cover board passes through the spiral shell across cover screw hole
Nail is fixed on cavity.
Preferably, finish≤0.8 for the copper that Self-locking screw 11 uses, the copper material for making Self-locking screw 11 is H65.
Preferably, the spacing between described two screw threads 9 is 0.1-2mm.
Preferably, receiving channel 8 is interior hexagonal, 11 top ring of screw is evenly distributed with six around the part of receiving channel 8
Slot extends to inside receiving channel 8.
Relative to traditional cavity body filter, the present invention is all used as the material of cover board body using using aluminium, and one
Aspect is can greatly to save material cost, the matter of another aspect aluminium using aluminium to manufacture cover board because aluminium is relatively cheap
Ground is softer, and it is easy that processing is got up, and also saves processing cost, it is contemplated that the actual demand of present filter tuning tunes self-locking
The specification of screw is M4-M10 at present, and accordingly, since the aluminium extensibility that cover board uses is preferable, the thickness of cover board need to only control
0.8-3.5mm, cover board is light and does not influence using effect, further saves material cost, the height of boss can also
Control is in 1-20mm, it is sufficient to meet the requirement of Self-locking screw；In addition, the cover board of the present invention is also provided with tuning threaded hole i.e.
The boss hollow with the integrally formed middle section of cover board body extended to cavity direction, and the present invention is replaced using boss
The combination of traditional tuned window and tuning swivel nut is that need to only be stretched to cover board body because processing boss, uses
Lathe can be automatically performed the processing of tuning threaded hole, without still further by stamping out tuned window and fixed two sets of swivel nut of tuning
Process, and the tuning threaded hole is processed by the material of cover board body, the present invention while saving process also not
Material can be wasted, and integrally formed boss is very firm, not interfere with the effect of tuning；Along its axis inside boss of the present invention
Direction is additionally provided with the tuned window to connect with threaded hole, and the tuned window is relative to threaded hole closer to the cavity of filter, tuned window
It is internally provided with cyclic spring sheet metal, the diameter of sheet metal is less than the diameter of filter tuner Self-locking screw, annular sheet metal
Capacitance is formed between inner wall and tuning screw so that be able to introduce the effect of capacity plate antenna on cover board, reduce tuning screw and lid
The current density of plate binding site reduces the inter-modulated signal level because of tuning screw and cover board poor contact generation, improves cavity
The intermodulation first-pass yield of filter, and it is to be detached from threaded hole downwards in the front end of screw to enter tuning porose area to use the sheet metal of elasticity
When squeeze elastic sheet metal, sheet metal can preferably lock Self-locking screw because the effect of elastic force inwardly squeezes, it is contemplated that at
The factor of this and efficiency further preferably uses cyclic spring copper sheet, because copper one side cost is relatively low, on the other hand has good
Elasticity；A kind of new tuning Self-locking screw has also been devised in the present invention, and the head of screw is equipped with screw thread and forms screw, which sets
There are two sections, according to the tuning range of cavity body filter and actual use demand, diameter >=M4 of the screw of screw thread formation of the present invention,
The height of corresponding screw is controlled in 1-20mm, and of the invention two sections of screw threads are simultaneously not attached to, due to the present invention using copper come
Screw is made, copper itself has good electric conductivity and ductility, and the diameter L and pitch P of two screw threads that the present invention designs
All identical, upper screw thread and lower screw thread will produce a displacement in the axial direction, displacement S be set as screw thread originally to
The lower deviation for extending location and practical lower screw position generation, the size of the displacement S is 0.1P -0.8P, due to
The presence of the offset, the power that screw head is subject to during screwdriver drives screw to screw in cavity body filter are just no longer uniformly divided
Cloth, since two screw threads form a slight dislocation, such screwdriver driving screw screws in the process inside cavity body filter
Middle screw head will produce slight deformation, because the power that screw head is subject to not is equally distributed, have certain inclined
From, and the screw threads of two dislocation can generate recovery after the extruding force by screwdriver centered on part between two screw threads
The restoring force of original shape resists the cavity of filter, to complete the self-locking of screw, simultaneously, it is contemplated that actual self-locking effect
Fruit, the section diameter between screw thread is 40%-the 70% of gauge diameter, because this section diameter has the danger of fracture when narrow
Danger, while the restoring force of two screw threads has counteracting to a certain extent, and two screw threads generate when this section diameter is wide
Extruding force again inadequate, self-locking effect unobvious, in addition, the present invention be used for manufacture screw copper material be H65, it is neither too hard, nor too soft,
Copper content can also meet the needs of tuning, and copper material finish≤0.8 ensures the friction system on screw surface and filter cover board
Number, it is ensured that self-locking effect, while not interfering with the effect of tuning again, it is contemplated that the height and diameter of screw, between two screw threads
Spacing control in 0.1-2mm, and the receiving channel of screw head is interior hexagonal, and screw head is around the portion of receiving channel
Point being evenly distributed with six bar grooves extends to inside receiving channel, this shape be more convenient the top deformation of screw with obtain it is better from
Lock effect.
In the description of this specification, the description meaning of reference term " one embodiment ", " example " or " some examples " etc.
Refer at least one reality that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained in the present invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or show
Example.Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples
It can be combined in any suitable manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of being detached from the principle of the present invention and objective a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The range of invention is limited by claim and its equivalent.
Claims (9)
1. a kind of cavity body filter, including cavity, cover board and tuning Self-locking screw, the cover board is for covering cavity body filter
Cavity, cover board include cover board body, which is characterized in that cover board body uses aluminium, the cover board body to be equipped with tuning screw thread
Hole, tuning threaded hole be specially extend to cavity direction with the integrally formed boss of cover board body, in the middle section of boss
Sky is equipped with threaded hole along its axis direction inside boss, is additionally provided with along its axis direction inside the boss and connects with threaded hole
Tuned window, for the tuned window relative to threaded hole closer to the cavity of filter, tuned window is internally provided with cyclic spring sheet metal,
The diameter of sheet metal is less than the diameter of filter tuner Self-locking screw；Tuning Self-locking screw is divided into head and bar portion, Self-locking screw
It is made using copper, the copper material for making Self-locking screw is H65, and finish≤0.8 of copper, screw one end is head, the other end
For bar portion, bar portion stretches into tuned radio frequency parameter in the cavity of filter, and Self-locking screw is fixed on the cover board of filter by head,
Apical head is equipped with for receiving screwdriver and so that tuning screw is screwed in inside cavity body filter according to the driving of the screwdriver
Receiving channel, the head of screw are equipped with screw thread and form screw, and the screw thread is equipped with two sections, the diameter >=M4 for the screw that screw thread is formed, two
It between section screw thread and is not attached to, the diameter L and pitch P of two sections screw thread are identical, and upper screw thread is with lower screw thread in axis direction
On will produce a displacement, displacement S is set as screw thread and the location of originally extended downwardly and practical lower screw thread position
The deviation of generation is set, the size of the displacement S is 0.1P -0.8P, and the section diameter between two screw threads is gauge diameter
40%—70%。
2. cavity body filter according to claim 1, which is characterized in that the thickness of the cover board body is 0.8-3.5mm.
3. cavity body filter according to claim 1, which is characterized in that the height of the boss is 1-20mm.
4. cavity body filter according to claim 2 or 3, which is characterized in that the spiral shell that the boss internal thread holes are formed
Set is applicable in the tuning Self-locking screw of M4-M10 specifications.
5. cavity body filter according to claim 1, which is characterized in that the cyclic spring sheet metal is cyclic spring copper
Piece.
6. cavity body filter according to claim 1 or 5, which is characterized in that the cyclic spring sheet metal and filter
Tuning Self-locking screw be in contact.
7. cavity body filter according to claim 1, which is characterized in that be additionally provided with cover screw on the cover board body
Hole, cover board are fixed on by the screw across cover screw hole on cavity.
8. cavity body filter according to claim 1, which is characterized in that the spacing between two screw threads of Self-locking screw is
0.1-2mm。
9. cavity body filter according to claim 1, which is characterized in that the receiving channel of Self-locking screw is interior hexagonal, spiral shell
Screw top portion is evenly distributed with six bar grooves around the part of receiving channel and extends to inside receiving channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510792786.XA CN105304987B (en) | 2015-11-18 | 2015-11-18 | A kind of cavity body filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510792786.XA CN105304987B (en) | 2015-11-18 | 2015-11-18 | A kind of cavity body filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105304987A CN105304987A (en) | 2016-02-03 |
| CN105304987B true CN105304987B (en) | 2018-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510792786.XA Active CN105304987B (en) | 2015-11-18 | 2015-11-18 | A kind of cavity body filter |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3713011A4 (en) | 2017-12-29 | 2020-11-25 | Huawei Technologies Co., Ltd. | Cavity filter |
| CN110071356A (en) * | 2018-01-24 | 2019-07-30 | 苏州艾通华通讯有限公司 | A kind of integration resonator |
| CN108825635A (en) * | 2018-09-14 | 2018-11-16 | 苏州迈特科技有限公司 | A kind of anti-loosing self-locking structure part |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1435579A (en) * | 2002-02-01 | 2003-08-13 | 名川政人 | Fastener structure, bolt and nut with said structure and making method thereof |
| CN101807736A (en) * | 2010-04-12 | 2010-08-18 | 深圳市大富科技股份有限公司 | Cavity filter, cavity filter cover plate and tuning screw self-locking device |
| 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 |
| CN205159479U (en) * | 2015-11-18 | 2016-04-13 | 强胜精密机械(苏州)有限公司 | Cavity filter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101277824B1 (en) * | 2012-03-22 | 2013-06-21 | 주식회사 에이스테크놀로지 | Waveguide filter |
-
2015
- 2015-11-18 CN CN201510792786.XA patent/CN105304987B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1435579A (en) * | 2002-02-01 | 2003-08-13 | 名川政人 | Fastener structure, bolt and nut with said structure and making method thereof |
| CN101807736A (en) * | 2010-04-12 | 2010-08-18 | 深圳市大富科技股份有限公司 | Cavity filter, cavity filter cover plate and tuning screw self-locking device |
| 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 |
| CN205159479U (en) * | 2015-11-18 | 2016-04-13 | 强胜精密机械(苏州)有限公司 | Cavity filter |
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| CN105304987A (en) | 2016-02-03 |
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