CN101922493B - Screw device and cavity filter using same - Google Patents
Screw device and cavity filter using same Download PDFInfo
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- CN101922493B CN101922493B CN 200910147646 CN200910147646A CN101922493B CN 101922493 B CN101922493 B CN 101922493B CN 200910147646 CN200910147646 CN 200910147646 CN 200910147646 A CN200910147646 A CN 200910147646A CN 101922493 B CN101922493 B CN 101922493B
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Abstract
The invention discloses a screw device, which at least comprises a threaded part and an expanded part, wherein the threaded part and the expanded part are fixedly connected; the expanded part is provided with a groove along an axis extension direction of the screw device; and the section expansion of one end of the expanded part close to the threaded part is smaller than that of the other end of the expanded part away from the threaded part. The screw device can be self-locked without a nut, so that the screw device has greatly low cost compared with the conventional screw locking by adopting the nut. Besides, the invention also provides a cavity filter using the screw device.
Description
Technical field
The present invention relates to communication technical field, relate in particular to screw device and use the cavity body filter of this screw device.
Background technique
Wave filter is widely used in the communications field as a kind of frequency selection device, especially field of radio frequency communication.In the base station that communications system completion signal transmits and receives, wave filter is used to select signal of communication, clutter or undesired signal that the filtering communication signal frequency is outer.
At present, in mobile communication base station system, the signal that generally uses cavity body filter to come antenna is transmitted and received carries out the frequency selection.Cavity body filter comprises cavity and cover plate, and this cavity is provided with a plurality of cavitys.The bottom that on this cavity, forms each cavity is provided with resonatron.This resonatron inside is hollow shape, forms resonant cavity.On the cover board corresponding with the resonant cavity of this resonatron position offers screw, and a tuning screw cooperates with this screw, and gos deep in this cavity.Through adjusting the distance of this tuning screw and this resonatron, reach the purpose of adjustment resonant frequency.
After adjusting resonant frequency, loosening in order to prevent above-mentioned tuning screw, need set up a set screw nut in the part that this tuning screw is positioned at outside the cavity usually.Yet, in the real world of resource worsening shortages nowadays, must not become irrespective problem in order to pursue higher economic and social benefit, to save production cost.And each tuning screw of above-mentioned cavity body filter all needs the extra set screw nut of setting up, and needs tuning cavity body filter for having a plurality of resonatrons, needs a large amount of set screw nuts, therefore, has greatly increased the cost of production of cavity body filter.
Summary of the invention
In view of this, the present invention provides a kind of have auto-lock function and screw device with low cost.
In addition, also be necessary to provide a kind of cavity body filter that uses above-mentioned screw device.
A kind of screw device comprises a helical thread portion and a dilation at least; Said helical thread portion is fixedly connected with dilation; On the said screw device axis bearing of trend of said dilation upper edge, be provided with groove, said dilation near the cross-sectional expansion of an end of said helical thread portion less than cross-sectional expansion away from an end of said helical thread portion.
In the above-mentioned screw device, the periphery of said dilation is provided with the screw thread identical with the pitch of said helical thread portion.
In the above-mentioned screw device, the part that forms said groove on the said dilation is two relative faces, and the plane at said two faces place has certain included angle.
In the above-mentioned screw device; Said dilation comprises first fastening part and second fastening part; Said first fastening part and second fastening part are of similar shape and size; And on said first fastening part and second fastening part, near shape and the shape and the equal and opposite in direction big or small and of said helical thread portion away from said helical thread portion.
In the above-mentioned screw device, said helical thread portion and said dilation are one-body molded, and are processed by elastic material.
A kind of cavity body filter, said cavity body filter is provided with the screw that cooperates with above-mentioned screw device, and said screw device adjustable ground is assemblied in the said screw.
After above-mentioned screw device is screwed into cavity body filter; Because the said cross-sectional expansion of said dilation is extruded said dilation greater than the cross-sectional expansion of said helical thread portion, said groove is distortion therefore; Producing one makes said dilation recover the active force that it is not extruded preceding shape; This active force pushes said screw, and said screw device is locked on the said screw, and then realizes the self-locking of said screw device.Said screw device does not need nut can realize self-locking, adopts nut to come lock screw with respect to tradition, and its cost reduces greatly.Because said screw dress combines with said cavity body filter; It does not need nut from locking on said cavity body filter; And said screw device can be contained in the cavity of said cavity body filter fully; The size that does not need the said cavity body filter of extra increase helps the miniaturization of said cavity body filter and integrated.
Description of drawings
Fig. 1 is the schematic representation of the screw device of a preferred embodiments.
Fig. 2 is the schematic representation of the cavity body filter of use screw device shown in Figure 1.
Embodiment
Present embodiment provides a kind of screw device; This screw device comprises a helical thread portion and a dilation at least; Said helical thread portion is fixedly connected with dilation; On the said screw device axis bearing of trend of said dilation upper edge, be provided with groove, said dilation near the cross-sectional expansion of an end of said helical thread portion less than cross-sectional expansion away from an end of said helical thread portion.In addition; Present embodiment also provides a kind of cavity body filter that uses above-mentioned screw device, and this cavity body filter comprises cavity, on said cavity, is provided with a cavity at least; Cavity bottom at the said cavity of said formation is provided with screw; Said screw device cooperates with said screw rotationally, and said dilation is squeezed in said screw and has the power to the screw expansion, makes said screw device from locking in the said screw.
In order to specify screw device provided by the invention, see also Fig. 1.Said screw device 100 comprises helical thread portion 110 and dilation 120.
Said helical thread portion 110 is provided with screw thread.Said dilation 120 comprises first fastening part 121 and second fastening part 123.The said screw device 100 axis bearing of trends in said dilation 120 upper edges are provided with groove 125.First fastening part 121 and second fastening part 123 are relatively arranged on the both sides of said groove 125, and are provided with the screw thread identical with the pitch of said helical thread portion 110 in the periphery of said first fastening part 121 and second fastening part 123.In other embodiments, screw thread also can not established in the periphery of said first fastening part 121 and second fastening part 123.Said first fastening part 121 and second fastening part 123 are of similar shape and size, and on said first fastening part 121 and second fastening part 123, near shape and the shape and the equal and opposite in direction big or small and away from said helical thread portion of said helical thread portion 110.The part that forms said groove 125 on the said dilation 120 is two relative faces, and the plane at said two faces place has certain included angle.
Said helical thread portion 110 is formed in one with said dilation 120, and said helical thread portion 110 and dilation 120 are processed by elastic material.In other embodiments, said helical thread portion 110 can also be that split is fixedly connected with dilation 120, and said helical thread portion 110 can be that conductor material is processed, and said dilation 120 is processed by elastic material or plastic material.
Said groove 125 is used for said screw device 100 is screwed into cavity, covers the back at the cover plate of cavity body filter said screw device 100 is adjusted, thereby adjust the electric capacity of said cavity body filter, realizes the purpose of adjustment resonant frequency.
After said screw device 100 is screwed into cavity; Because the cross-sectional expansion of said dilation 120 is extruded said dilation 120 greater than the cross-sectional expansion of said helical thread portion 110, the therefore distortion of said groove 125; Producing one makes said dilation 120 recover the active force that it is not extruded preceding shape; This active force pushes said cavity, said screw device 100 is locked on the said cavity, and then realizes the self-locking of said screw device 100.
Said screw device 100 can be realized self-locking, and the realization of said auto-lock function do not need the extra nut of setting up, and therefore, makes and makes said cost with screw device of auto-lock function and significantly reduce.In addition; Because said screw device 100 combines with said cavity body filter; It does not need nut from locking on said cavity body filter; And said screw device can be contained in the cavity of said cavity body filter fully, does not need the size of the said cavity body filter of extra increase, helps the miniaturization of said cavity body filter and integrated.
As shown in Figure 2, it is the schematic representation of the cavity body filter of use screw device 100 shown in Figure 1.Said cavity body filter 200 comprises cavity 210, resonance post 220, cover plate 230, screw device 100.Said cavity 210 is provided with cavity 211; Said resonance post 220 is contained in the said cavity 211, and an end of said resonance post 220 and said cavity 210 is fixing, and its other end has flange plate 221; Said resonance post 220 inside are hollow shape, form containing space 223.Corresponding part, position with said resonance post 220 on the said cover plate 230 is provided with screw 213.Said screw device 100 matches with said screw 213, and said helical thread portion 110 has part to go deep in the said cavity 211.Said cover plate 230 is covered on the said cavity 210.After said cover plate 230 covers, through groove 125 positions of the said screw device 100 of adjustment in said cavity body filter 200 of screw device 100, and then the purpose of realization adjustment resonant frequency.
The detailed description of above-mentioned screw device 100 and the cavity body filter 200 that uses this screw device 100 is a technological scheme of understanding the present invention for help, and the technician of related domain should be appreciated that the content of this specification should not be construed as limitation of the present invention.
Claims (2)
1. screw device; Be used for cavity body filter; It is characterized in that: this screw device comprises a helical thread portion and a dilation at least; Said helical thread portion is fixedly connected with dilation, and said dilation less than the cross-sectional expansion away from an end of said helical thread portion, is provided with groove near the cross-sectional expansion of an end of said helical thread portion on the said screw device axis bearing of trend of said dilation upper edge; Said dilation comprises first fastening part and second fastening part; First fastening part and second fastening part are relatively arranged on the both sides of said groove, and said first fastening part and second fastening part are of similar shape and size, and on said first fastening part and second fastening part; Shape and shape and equal and opposite in direction big or small and near said helical thread portion away from said helical thread portion; The periphery of said dilation is provided with the screw thread identical with the pitch of said helical thread portion, and the part that forms said groove on the said dilation is two relative faces, and the plane at said two faces place has certain included angle;
Said helical thread portion and said dilation are one-body molded; Said helical thread portion and said dilation are processed by elastic material; Perhaps said helical thread portion is fixedly connected with said dilation split; Said helical thread portion is processed by conductor material, and said dilation is processed by elastic material or plastic material;
Said cavity body filter comprises cavity, resonance post, cover plate, screw device, and said cavity is provided with cavity, and said resonance post is contained in the said cavity; And an end and the said cavity of said resonance post are fixed; Its other end has flange plate, and said resonance post inside is hollow shape, forms containing space; Corresponding part, position with said resonance post on the said cover plate is provided with screw; Said screw device matches with said screw, and said helical thread portion have the part go deep in the said cavity, said cover plate is covered on the said cavity; Said screw device does not need nut from locking on the said cavity body filter, and said screw device is contained in the cavity of said cavity body filter fully.
2. cavity body filter, it is characterized in that: comprise cavity, resonance post, cover plate, screw device, said cavity is provided with cavity; Said resonance post is contained in the said cavity, and an end of said resonance post and said cavity fix, and its other end has flange plate; Said resonance post inside is hollow shape; Form containing space, the corresponding part, position with said resonance post on the said cover plate is provided with screw, and said screw device matches with said screw; And the helical thread portion of said screw device has part to go deep in the said cavity; Said cover plate is covered on the said cavity, and said screw device does not need nut from locking on the said cavity body filter, and said screw device is contained in the cavity of said cavity body filter fully;
This screw device comprises a helical thread portion and a dilation at least; Said helical thread portion is fixedly connected with dilation; Said dilation near the cross-sectional expansion of an end of said helical thread portion less than cross-sectional expansion away from an end of said helical thread portion; On the said screw device axis bearing of trend of said dilation upper edge, be provided with groove, said dilation comprises first fastening part and second fastening part, and first fastening part and second fastening part are relatively arranged on the both sides of said groove; Said first fastening part and second fastening part are of similar shape and size; And on said first fastening part and second fastening part, near shape and the shape and the equal and opposite in direction big or small and away from said helical thread portion of said helical thread portion, the periphery of said dilation is provided with the screw thread identical with the pitch of said helical thread portion; The part that forms said groove on the said dilation is two relative faces, and the plane at said two faces place has certain included angle;
Said helical thread portion and said dilation are one-body molded; Said helical thread portion and said dilation are processed by elastic material; Perhaps said helical thread portion is fixedly connected with said dilation split; Said helical thread portion is processed by conductor material, and said dilation is processed by elastic material or plastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910147646 CN101922493B (en) | 2009-06-11 | 2009-06-11 | Screw device and cavity filter using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910147646 CN101922493B (en) | 2009-06-11 | 2009-06-11 | Screw device and cavity filter using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101922493A CN101922493A (en) | 2010-12-22 |
| CN101922493B true CN101922493B (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910147646 Active CN101922493B (en) | 2009-06-11 | 2009-06-11 | Screw device and cavity filter using same |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661308A (en) * | 2012-05-23 | 2012-09-12 | 无锡商业职业技术学院 | Anti-loosening fastening screw |
| CN105927650A (en) * | 2016-06-29 | 2016-09-07 | 王辉 | Tuning self-locking screw rod for radio frequency device and manufacture method thereof |
| KR101894761B1 (en) * | 2018-05-29 | 2018-10-18 | 주식회사 엠피디 | Cavity filter comprising tunning bolt |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2093171A (en) * | 1933-01-27 | 1937-09-14 | Illinois Tool Works | Tapping screw |
| US4628283A (en) * | 1983-11-07 | 1986-12-09 | The Narda Microwave Corporation | Hermetically sealed oscillator with dielectric resonator tuned through dielectric window by adjusting screw |
| CN1355946A (en) * | 1999-04-14 | 2002-06-26 | 艾利森电话股份有限公司 | tuning device |
| CN101315999A (en) * | 2008-06-27 | 2008-12-03 | 华为技术有限公司 | Screw device and cavity filter using the same |
| CN201412426Y (en) * | 2009-06-10 | 2010-02-24 | 大富（深圳）科技有限公司 | Screw device and chamber wave filter applying same |
-
2009
- 2009-06-11 CN CN 200910147646 patent/CN101922493B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2093171A (en) * | 1933-01-27 | 1937-09-14 | Illinois Tool Works | Tapping screw |
| US4628283A (en) * | 1983-11-07 | 1986-12-09 | The Narda Microwave Corporation | Hermetically sealed oscillator with dielectric resonator tuned through dielectric window by adjusting screw |
| CN1355946A (en) * | 1999-04-14 | 2002-06-26 | 艾利森电话股份有限公司 | tuning device |
| CN101315999A (en) * | 2008-06-27 | 2008-12-03 | 华为技术有限公司 | Screw device and cavity filter using the same |
| CN201412426Y (en) * | 2009-06-10 | 2010-02-24 | 大富（深圳）科技有限公司 | Screw device and chamber wave filter applying same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101922493A (en) | 2010-12-22 |
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Address after: 518104, Guangdong, Shenzhen province Baoan District manhole Street oyster road manhole Industrial Company Third Industrial Zone A1, A2, A3 101 and 2 layers, A4 Applicant after: Shenzhen Tat Fook Technology Co., Ltd. Address before: 518108 Bao'an District, Shenzhen City, Guangdong Province, Shiyan Town, love group with the rich industrial area A \ B Dong Applicant before: Shenzhen Tat Fook Technology Co., Ltd. |
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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, Guangdong, Shenzhen province Baoan District manhole Street oyster road manhole Industrial Company Third Industrial Zone A1, A2, A3 101 and 2 layers, A4 Patentee before: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd. |
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