CN104795615A - Cavity filter - Google Patents

Cavity filter Download PDF

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Publication number
CN104795615A
CN104795615A CN201410028643.7A CN201410028643A CN104795615A CN 104795615 A CN104795615 A CN 104795615A CN 201410028643 A CN201410028643 A CN 201410028643A CN 104795615 A CN104795615 A CN 104795615A
Authority
CN
China
Prior art keywords
cavity
cavity filter
adjustment screw
resonatron
filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201410028643.7A
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Chinese (zh)
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CN104795615B (en
Inventor
翁国执
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hongfujin Precision Industry Shenzhen Co Ltd
Hongfujin Precision Electronics Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
Original Assignee
Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hongfujin Precision Industry Shenzhen Co Ltd, Hon Hai Precision Industry Co Ltd filed Critical Hongfujin Precision Industry Shenzhen Co Ltd
Priority to CN201410028643.7A priority Critical patent/CN104795615B/en
Publication of CN104795615A publication Critical patent/CN104795615A/en
Application granted granted Critical
Publication of CN104795615B publication Critical patent/CN104795615B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

A cavity filter comprises cavity bodies, resonant tubes, an adjusting screw and an upper cover, wherein the upper cover covers the cavity bodies; each cavity body comprises a cavity body bottom plate; the resonant tube is fixed on the cavity body bottom plate; the resonant tube and the cavity body bottom plate are provided with a thread hole; and the adjusting screw is screwed in the cavity body from the opening of the thread hole to adjust the resonant frequency of the cavity filter. Through arranging the thread hole in the resonant tube and the bottom part of the cavity body, the adjusting screw is screwed inside from the thread hole, space outside the cavity body of the cavity filter is saved, and the needed space for the cavity filter is reduced.

Description

Cavity filter
Technical field
The present invention relates to a kind of cavity filter, particularly relate to a kind of cavity filter saving containment portion space.
Background technology
Cavity filter is one of assembly common in a kind of communication system, cavity filter generally includes upper cover and multiple cavity, one or more resonatron is provided with in each cavity, the function of each cavity is equivalent to an electronics oscillating circuit, existing cavity filter is all the nut covering fixing some adjustment screw He correspond on cavity, but adjustment screw is fixed on and covers, affect the evenness of upper cover, and occupy the space outerpace of cavity.
Summary of the invention
In view of this, need to provide a kind of cavity filter preventing adjustment screw from taking the external space of cavity.
A kind of cavity filter in one embodiment of the present invention, comprise cavity, resonatron, adjustment screw and upper cover, upper cover is covered on cavity, cavity comprises well floor, resonatron is fixed on cavity, resonatron and well floor offer screwed hole, and adjustment screw from screwed hole opening part precession cavity, and then regulates the resonance frequency of cavity filter.
Preferably, described cavity filter also comprises auxiliary annulus, and between upper cover and debugging screw, auxiliary annulus increases the scope of cavity filter debugging frequency.
Preferably, the interior diameter of auxiliary annulus is greater than the diameter of section of adjustment screw.
Preferably, resonatron and well floor run through by screwed hole, and adjustment screw, from screwed hole opening part precession cavity, does not take the space outside cavity.
Preferably, adjustment screw does not have nut, is provided with a cross recess at the end of adjustment screw, conveniently uses screwdriver turning adjusting screw.
Preferably, cavity filter also comprises resonance cup, and resonance cup is cup-shaped, and there is perforate centre, and the mode of resonance cup welding is fixed on resonatron.
Preferably, auxiliary annulus is placed in resonance cup, does not take the space of inside cavity.
Preferably, the mode of auxiliary annulus welding is fixed on upper cover.
The invention solves original cavity filter on covered screw and caused the irregular problem of upper cover, and adjustment screw runs through from resonatron and well floor, does not take the space above cavity upper cover, reduces the space held shared by cavity filter.
Accompanying drawing explanation
Fig. 1 is the profile of cavity filter of the present invention.
Fig. 2 is the cavity of cavity filter of the present invention and the stereogram of resonatron.
Fig. 3 is the stereogram of the adjustment screw of cavity filter of the present invention.
Fig. 4 is the stereogram of the resonance cup of cavity filter of the present invention.
Main element symbol description
Cavity filter 10
Cavity 11
Well floor 111
Screwed hole 112
Resonatron 12
Step surface 121
Adjustment screw 13
Cross recess 131
Resonance cup 14
First resonance cup circle wall 141
Second resonance cup circle wall 142
Resonance cup extension limit 143
Auxiliary annulus 15
Upper cover 16
Lower embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Consult Fig. 1, shown cavity filter 10 comprises cavity 11, resonatron 12, adjustment screw 13, resonance cup 14 and upper cover 16, and upper cover 16 is thin-slab structures, and upper cover 16 is covered on cavity 11, and resonatron 12 is one-body molded with cavity 11.The centre of upper cover 16 lower surface is fixed with an auxiliary annulus 15, auxiliary annulus 15 is circular cylinders of a hollow, be positioned at directly over adjustment screw 13, the interior diameter of auxiliary annulus 15 is greater than the diameter of section of adjustment screw 13, enter in described auxiliary annulus 15 when adjustment screw 13 rotates up, auxiliary annulus 15 encases adjustment screw 13, so just change the area of the upper cover lower surface corresponding with adjustment screw 13 and change distributed capacitance, and then helping the scope changing cavity filter debugging frequency.In addition, auxiliary annulus 15 can be placed in resonance cup 14, so do not take the inner space of cavity 11.
Consult Fig. 2 to Fig. 3, cavity 11 comprises well floor 111, resonatron 12 entirety is in column structure, be divided into upper and lower two diameter of section cylinders in different size, a step surface 121 is formed between two cylinders, run through by screwed hole 112 in the middle of well floor 111 with in the middle of resonatron 12, adjustment screw 13 does not have nut, a cross recess 131 is had in the bottom of adjustment screw 13, convenient with screwdriver turning adjusting screw 13, adjustment screw 13 is from the precession of screwed hole 112 opening part, do not take the superjacent air space of the upper cover 16 of cavity 11, the resonance frequency of cavity filter 10 is regulated by turning adjusting screw 13.
Consult Fig. 4, resonance cup 14 is cup-shaped, middle formation through hole, resonance cup 14 can change the resonance frequency of cavity filter, resonance cup 14 comprises the first resonance cup circle wall 141, second resonance cup circle wall 142 and resonance cup extension limit 143, first resonance cup circle wall 141 and the second resonance cup circle wall 142 are two different column structures of diameter, resonance cup extension limit 143 is caused by the second resonance cup circle wall 142 horizontal expansion, during installation, first resonance cup circle wall 141 is fixed on resonatron 12, and step surface 121 withstands the first resonance cup circle wall 141.
In the specific embodiment of the invention, auxiliary annulus 15 can be fixed on upper cover 16 by spot welding or other mode.
In the specific embodiment of the invention, the inner diameter size of the first resonance cup circle wall 141 on resonance cup 14 is identical with the diameter dimension of a cylinder above of resonatron 12, and the inner diameter size of the first resonance cup circle wall 141 does tolerance, the diameter dimension of a cylinder above of resonatron 12 does lower tolerance, resonance cup 14 and resonatron 12 can be allowed like this to closely cooperate, electric welding then can be utilized resonance cup 14 and resonatron 12 to be welded together.
In the specific embodiment of the invention, well floor 111 is one-body molded by die casting with resonatron 12, and resonance cup 14 also by die casting and machining, can will do second time fine finishining after well floor 111 and resonatron 12, resonance cup 14 die cast.Make size can meet our matching requirements.
The present invention well solves because adjustment screw 13 is positioned on cavity 11 upper cover 16 and causes upper cover 16 out-of-flatness and adjustment screw 13 to take the problem of upper cover 16 superjacent air space, and the present invention not only outward appearance is beautiful, and has saved the space holding cavity filter.
It is more than the specific embodiment of the present invention; it describes comparatively concrete and detailed; but therefore can not be interpreted as the restriction to the scope of the claims of the present invention; it should be noted that; to one skilled in the art; under the prerequisite not departing from inventive concept, can also make some distortion, these apparent replacements all belong to protection scope of the present invention.

Claims (9)

1. a cavity filter, comprise cavity, resonatron, adjustment screw and upper cover, described upper cover is covered on described cavity, described cavity comprises well floor, described resonatron is fixed on described well floor, it is characterized in that: described resonatron and described well floor offer screwed hole, described adjustment screw from cavity described in the precession of described screwed hole opening part, and then regulates the resonance frequency of described cavity filter.
2. cavity filter as claimed in claim 1, is characterized in that: described cavity filter also comprises auxiliary annulus, and between described upper cover and described adjustment screw, described auxiliary annulus increases the scope of described cavity filter debugging frequency.
3. cavity filter as claimed in claim 2, is characterized in that: the interior diameter of described auxiliary annulus is greater than the diameter of section of described adjustment screw.
4. cavity filter as claimed in claim 1, it is characterized in that: described resonatron and described well floor run through by described screwed hole, described adjustment screw, from cavity described in the precession of described screwed hole opening part, does not take the space outside described cavity.
5. cavity filter as claimed in claim 1, it is characterized in that: described adjustment screw does not have nut, be provided with a cross recess at the end of described adjustment screw, convenience screwdriver rotates described adjustment screw.
6. cavity filter as claimed in claim 1, it is characterized in that: described cavity filter also comprises resonance cup, described resonance cup is cup-shaped, and there is perforate centre, and described resonance cup utilizes the mode of welding to be fixed on described resonatron.
7. cavity filter as claimed in claim 2, is characterized in that: described auxiliary annulus is placed in described resonance cup, does not take the space of described inside cavity.
8. cavity filter as claimed in claim 1, is characterized in that: described resonatron and described well floor utilize the mode of die casting one-body molded, or the mode of resonance cup welding is fixed on described well floor.
9. cavity filter as claimed in claim 7, is characterized in that: the mode of described auxiliary annulus welding is fixed on described upper cover.
CN201410028643.7A 2014-01-22 2014-01-22 Cavity filter Active CN104795615B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410028643.7A CN104795615B (en) 2014-01-22 2014-01-22 Cavity filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410028643.7A CN104795615B (en) 2014-01-22 2014-01-22 Cavity filter

Publications (2)

Publication Number Publication Date
CN104795615A true CN104795615A (en) 2015-07-22
CN104795615B CN104795615B (en) 2019-03-05

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Family Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108631029A (en) * 2017-03-23 2018-10-09 鸿富锦精密工业(深圳)有限公司 Cavity filter
US10403957B2 (en) 2017-03-23 2019-09-03 Nanning Fugui Precision Industrial Co., Ltd. Cavity filter

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1355946A (en) * 1999-04-14 2002-06-26 艾利森电话股份有限公司 Tuning arrangement
CN101315999A (en) * 2008-06-27 2008-12-03 华为技术有限公司 Screw device and cavity filter using the same
TWM370077U (en) * 2009-06-18 2009-12-01 Hon Hai Prec Ind Co Ltd Testing probe assembly of a cavity filter
CN102354780A (en) * 2011-07-22 2012-02-15 深圳市大富科技股份有限公司 Cavity filter and communication device
CN203119067U (en) * 2013-01-25 2013-08-07 华为技术有限公司 Cavity filter
CN203180029U (en) * 2013-03-20 2013-09-04 深圳市大富科技股份有限公司 Cavity filter and radio frequency communication device
CN203351722U (en) * 2013-05-15 2013-12-18 成都联帮微波通信工程有限公司 Small-scale cavity filter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1355946A (en) * 1999-04-14 2002-06-26 艾利森电话股份有限公司 Tuning arrangement
CN101315999A (en) * 2008-06-27 2008-12-03 华为技术有限公司 Screw device and cavity filter using the same
TWM370077U (en) * 2009-06-18 2009-12-01 Hon Hai Prec Ind Co Ltd Testing probe assembly of a cavity filter
CN102354780A (en) * 2011-07-22 2012-02-15 深圳市大富科技股份有限公司 Cavity filter and communication device
CN203119067U (en) * 2013-01-25 2013-08-07 华为技术有限公司 Cavity filter
CN203180029U (en) * 2013-03-20 2013-09-04 深圳市大富科技股份有限公司 Cavity filter and radio frequency communication device
CN203351722U (en) * 2013-05-15 2013-12-18 成都联帮微波通信工程有限公司 Small-scale cavity filter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108631029A (en) * 2017-03-23 2018-10-09 鸿富锦精密工业(深圳)有限公司 Cavity filter
US10403957B2 (en) 2017-03-23 2019-09-03 Nanning Fugui Precision Industrial Co., Ltd. Cavity filter
CN108631029B (en) * 2017-03-23 2021-04-27 鸿富锦精密工业(深圳)有限公司 Cavity filter

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