JP2539828Y2 - Dielectric filter - Google Patents
Dielectric filterInfo
- Publication number
- JP2539828Y2 JP2539828Y2 JP1991024083U JP2408391U JP2539828Y2 JP 2539828 Y2 JP2539828 Y2 JP 2539828Y2 JP 1991024083 U JP1991024083 U JP 1991024083U JP 2408391 U JP2408391 U JP 2408391U JP 2539828 Y2 JP2539828 Y2 JP 2539828Y2
- Authority
- JP
- Japan
- Prior art keywords
- resonator
- spring
- spring member
- case
- lid
- 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.)
- Expired - Lifetime
Links
Description
【０００１】[0001]
【産業上の利用分野】この考案は誘電体フィルタに関
し、特に、たとえば、ばね部材を用いて内面Ｕ字状のケ
ース内に円筒形同軸共振器を固定する、誘電体フィルタ
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric filter, and more particularly, to a dielectric filter in which a cylindrical coaxial resonator is fixed in a U-shaped case using a spring member.
【０００２】[0002]
【従来の技術】図６および図７を参照して、この種の従
来の誘電体フィルタ１は、内面がＵ字状に形成されたケ
ース２を含む。ケース２の内部には、第１ばね部材３、
円筒形同軸共振器（以下、単に「共振器」という）４お
よび第２ばね部材５が順次挿入され、図示しないエポキ
シ樹脂等の接着材が充填される。そして、ねじ６によっ
て蓋７が取り付けられる。この従来技術では、第１ばね
部材３および第２ばね部材５による上下方向からの押圧
力と接着材とによって共振器４が固定される。2. Description of the Related Art Referring to FIGS. 6 and 7, a conventional dielectric filter 1 of this type includes a case 2 having an inner surface formed in a U-shape. Inside the case 2, a first spring member 3,
A cylindrical coaxial resonator (hereinafter simply referred to as a “resonator”) 4 and a second spring member 5 are sequentially inserted and filled with an adhesive (not shown) such as epoxy resin. Then, the lid 7 is attached by the screw 6. In this conventional technique, the resonator 4 is fixed by the pressing force from the vertical direction by the first spring member 3 and the second spring member 5 and the adhesive.
【０００３】[0003]
【考案が解決しようとする課題】上述の従来技術では、
接着材を併用するため、組立作業性が悪いという問題点
があった。また、共振器４の外導体８は第１ばね部材３
を介してケース２とアース接続されているが、外導体８
とばね部材３との間等に接着材が回り込んで接続不良を
生じる恐れがあり、フィルタ特性の信頼性に問題があっ
た。In the above-mentioned prior art,
Since the adhesive is used together, there is a problem that the assembling workability is poor. The outer conductor 8 of the resonator 4 is connected to the first spring member 3.
Through the outer conductor 8
There is a possibility that the adhesive may wrap around between the spring member 3 and the like to cause connection failure, and there is a problem in the reliability of the filter characteristics.
【０００４】それゆえに、この考案の主たる目的は、組
立作業性および信頼性の両方を向上できる、誘電体フィ
ルタを提供することである。[0004] Therefore, a main object of the present invention is to provide a dielectric filter which can improve both the assembling workability and the reliability.
【０００５】[0005]
【課題を解決するための手段】この考案は、その内面が
Ｕ字状に形成されたケース、ケースに取り付けられる
蓋、ケース内に第１ばね部材によって固定的に収納され
る円筒形同軸共振器、および蓋と共振器との間に介挿さ
れる第２ばね部材を備える誘電体フィルタにおいて、第
１ばね部材は共振器を挟持するＵ字状の第１ばね部分
と、第１ばね部分の両端部から外方へ延びて形成されか
つケースの内面に対して弾性的に圧接されて共振器をそ
の軸芯方向へ押圧する第２ばね部分とを含むことを特徴
とする、誘電体フィルタである。According to the present invention, there is provided a case having a U-shaped inner surface, a lid attached to the case, and a cylindrical coaxial resonator fixedly housed in the case by a first spring member. And a dielectric filter including a second spring member interposed between the lid and the resonator, wherein the first spring member includes a U-shaped first spring portion sandwiching the resonator, and both ends of the first spring portion. Extending outward from the portion and elastically pressed against the inner surface of the case to remove the resonator.
And a second spring portion that presses in the axial direction of the dielectric filter.
【０００６】[0006]
【作用】ケース内で第１ばね部材の第１ばね部分により
共振器を挟持すると、第２ばね部分の端部がケースの内
側面に圧接され、第１ばね部分と第２ばね部分との境界
部近傍において共振器に軸芯方向の押圧力が働く。ま
た、共振器の上に第２ばね部材を載置して蓋を取り付け
ると、第１ばね部材および第２ばね部材が弾性変形さ
れ、それによって共振器に上下方向からの押圧力が働
く。When the resonator is sandwiched by the first spring portion of the first spring member in the case, the end of the second spring portion is pressed against the inner surface of the case, and the boundary between the first spring portion and the second spring portion. In the vicinity of the portion, a pressing force acts on the resonator in the axial direction . In addition, when the second spring member is placed on the resonator and the lid is attached, the first spring member and the second spring member are elastically deformed, whereby a vertical pressing force acts on the resonator.
【０００７】[0007]
【考案の効果】この考案によれば、従来の上下方向から
の押圧力に加えて第２ばね部分による共振器の軸芯方向
に向かう押圧力が働くので、ケース内で共振器を確実に
固定できる。したがって、接着材を併用する必要がなく
なり、組立の作業性を向上できる。しかも、接着材を併
用することによるアース接続の不良等を解消でき、フィ
ルタ特性の信頼性を向上できる。According to the present invention, in addition to the conventional pressing force in the vertical direction , the axial direction of the resonator by the second spring portion is used.
Since the pressing force acting on the resonator acts, the resonator can be securely fixed in the case. Therefore, it is not necessary to use an adhesive together, and the workability of assembly can be improved. In addition, it is possible to eliminate the failure of the ground connection and the like due to the combined use of the adhesive, thereby improving the reliability of the filter characteristics.
【０００８】この考案の上述の目的，その他の目的，特
徴および利点は、図面を参照して行う以下の実施例の詳
細な説明から一層明らかとなろう。The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.
【０００９】[0009]
【実施例】図１〜図３を参照して、この実施例の誘電体
フィルタ１０は、内面略Ｕ字状（図２）の導電性材料か
らなるケース１２を含む。ケース１２の上面には、複数
のねじ孔１４が形成され、長さ方向両端面には、コネク
タ１６が取り付けられる。コネクタ１６の端子１８は、
ケース１２の内部に延出される。Referring to FIGS. 1 to 3, a dielectric filter 10 of this embodiment includes a case 12 made of a conductive material having a substantially U-shaped inner surface (FIG. 2). A plurality of screw holes 14 are formed on the upper surface of the case 12, and connectors 16 are attached to both end surfaces in the length direction. The terminal 18 of the connector 16
It is extended inside the case 12.
【００１０】ケース１２の内部には、図３に示すような
それぞれ２つの第１ばね部材２０、共振器２２および第
２ばね部材２４等が配置され、そして、蓋２６が被せら
れる。第１ばね部材２０は、たとえばりん青銅からな
り、共振器２２を挟持する略Ｕ字状の第１ばね部分２８
を含む。第１ばね部分２８の両端部には、外方に略
「ハ」字状に延びて第２ばね部分３０が形成され、底部
には、ケース１２の底部および共振器２２の外導体４０
（後述）と弾性的に圧接し得るように略「ヘ」字状に屈
曲された複数（この実施例では１０個）の第３ばね部分
３２が形成される。As shown in FIG. 3, two first spring members 20, a resonator 22, a second spring member 24, and the like are arranged inside the case 12, and a lid 26 is covered. The first spring member 20 is made of, for example, phosphor bronze, and has a substantially U-shaped first spring portion 28 that sandwiches the resonator 22.
including. At both ends of the first spring portion 28, a second spring portion 30 is formed to extend outward in a substantially “C” shape, and at the bottom, the bottom of the case 12 and the outer conductor 40 of the resonator 22 are formed.
A plurality (ten in this embodiment) of third spring portions 32 are formed in a substantially "F" shape so as to be elastically pressed against a later-described portion.
【００１１】共振器２２は、略円筒形状のたとえば酸化
チタン系セラミックなどからなる誘電体ユニット３４を
含み、誘電体ユニット３４の内部には、長さ方向に延び
て貫通孔３６が形成される。誘電体ユニット３４の外側
面には、両端面すなわち開放面３８を除いて金属膜から
なる外導体４０が形成され、貫通孔３６の内面には、金
属膜からなる内導体４２が形成される。また、貫通孔３
６には、接続ばね４４およびその両端面に電極４６が形
成された略円筒形状のコンデンサ４８が挿入される。し
たがって、コンデンサ４８の一方の電極４６は、接続ば
ね４４を介して共振器２２の内導体４２と接続される。
コンデンサ４８の他方の電極４６は、リード線５０によ
りコネクタ１６の端子１８と接続される。The resonator 22 includes a substantially cylindrical dielectric unit 34 made of, for example, a titanium oxide ceramic, and a through hole 36 is formed inside the dielectric unit 34 so as to extend in the longitudinal direction. An outer conductor 40 made of a metal film is formed on an outer surface of the dielectric unit 34 except for both end surfaces, that is, the open surfaces 38, and an inner conductor 42 made of a metal film is formed on an inner surface of the through hole 36. Also, the through hole 3
A substantially cylindrical capacitor 48 having a connection spring 44 and electrodes 46 formed on both end surfaces thereof is inserted into 6. Therefore, one electrode 46 of the capacitor 48 is connected to the inner conductor 42 of the resonator 22 via the connection spring 44.
The other electrode 46 of the capacitor 48 is connected to the terminal 18 of the connector 16 by a lead wire 50.
【００１２】第２ばね部材２４は、たとえばりん青銅か
らなり、略「ヘ」字状の第４ばね部分５２を含む。第４
ばね部分５２の中央部には、蓋２６の底面および共振器
２２の外導体４０と弾性的に圧接し得るように略「ヘ」
字状に屈曲された複数（この実施例では６個）の第５ば
ね部分５４が形成される。蓋２６は導電性材料からな
り、その底面には、図２に示すように、共振器２２の外
面に沿う溝５６が形成される。また、蓋２６の周辺部に
は、ねじ５８を通す複数の孔６０がケース１２のねじ孔
１４と対応する位置に形成され、蓋２６の中央部には、
長さ方向に並んで、ねじ孔６２が形成される。このねじ
孔６２には、周波数調整用ねじ６４がねじ込まれる。し
たがって、ねじ孔６２は周波数調整効果を発揮できる位
置に形成される必要がある。The second spring member 24 is made of phosphor bronze, for example, and includes a substantially "F" -shaped fourth spring portion 52. 4th
The central portion of the spring portion 52 is substantially "f" so that it can be elastically pressed against the bottom surface of the lid 26 and the outer conductor 40 of the resonator 22.
A plurality of (six in this embodiment) fifth spring portions 54 bent in a letter shape are formed. The lid 26 is made of a conductive material, and has a groove 56 formed on the bottom surface along the outer surface of the resonator 22 as shown in FIG. A plurality of holes 60 through which the screws 58 pass are formed at positions corresponding to the screw holes 14 of the case 12 in the peripheral portion of the lid 26.
A screw hole 62 is formed along the length direction. A frequency adjusting screw 64 is screwed into the screw hole 62. Therefore, the screw hole 62 needs to be formed at a position where the frequency adjustment effect can be exhibited.
【００１３】第１ばね部材２０の第１ばね部分２８によ
って共振器２２を挟持した状態で両者をケース１２の内
部に配置すると、第１ばね部材２０の第２ばね部分３０
の端部がケース１２の内壁に弾性的に圧接される。した
がって、第１ばね部分２８と第２ばね部分３０との境界
部近傍において共振器２２には、図２において矢印６６
ａおよび６６ｂで示す方向、すなわち共振器２２の軸芯
方向に押圧力Ｆ1 およびＦ2 が働く。また、共振器２２
の上に第２ばね部材２４を載置して、蓋２６を被せ、ね
じ５８で固定すると、第１ばね部材２０（第３ばね部分
３２）および第２ばね部材２４（第４ばね部分５２およ
び第５ばね部分５４）が弾性変形され、それによって共
振器２２の下部および上部には、図２において矢印６８
ａおよび６８ｂで示す方向に押圧力Ｆ3 およびＦ4 が働
く。したがって、共振器２２は、これら４方向からの押
圧力Ｆ1 ，Ｆ2 ，Ｆ3 およびＦ4 によって強固に固定さ
れる。When the resonator 22 is sandwiched by the first spring portion 28 of the first spring member 20 and both are arranged inside the case 12, the second spring portion 30 of the first spring member 20
Is elastically pressed against the inner wall of the case 12. Therefore, the resonator 22 near the boundary between the first spring portion 28 and the second spring portion 30 has an arrow 66 in FIG.
a and 66b , ie the axis of the resonator 22
Pressing force F 1 and F 2 is acting in the direction. Further, the resonator 22
When the second spring member 24 is placed on the top, the lid 26 is covered, and fixed with screws 58, the first spring member 20 (the third spring portion 32) and the second spring member 24 (the fourth spring portion 52 and The fifth spring part 54) is elastically deformed, so that the lower and upper parts of the resonator 22 have arrows 68 in FIG.
pressing force in the direction indicated by a and 68b F 3 and F 4 acts. Therefore, the resonator 22 is firmly fixed by the pressing force F 1, F 2, F 3 and F 4 from the four directions.
【００１４】この実施例の誘電体フィルタ１０において
は、共振器２２の外導体４０が第１ばね部材２０および
第２ばね部材２４を介してケース１２および蓋２６とア
ース接続される。また、２つの共振器２２は、直列に配
置され、間隔Ａ（図３）によって決まるエアギャップ容
量Ｃ（図４）で電界結合される。したがって図４に示す
ような等価回路が構成される。In the dielectric filter 10 of this embodiment, the outer conductor 40 of the resonator 22 is grounded to the case 12 and the lid 26 via the first spring member 20 and the second spring member 24. Further, the two resonators 22 are arranged in series, and are electrically coupled by an air gap capacitance C (FIG. 4) determined by the interval A (FIG. 3). Therefore, an equivalent circuit as shown in FIG. 4 is formed.
【００１５】この実施例によれば、第１ばね部材２０お
よび第２ばね部材２４によって共振器２２を強固にしか
も簡単に固定できる。また、間隔Ａ（図３）を容易に変
更できるので、フィルタ特性を容易に調整できる。な
お、第１ばね部材２０の第３ばね部分３２は、アース接
続をより安定させることを主目的として形成されるもの
であるが、必ずしも形成される必要はない。すなわち、
図５に示すような第３ばね部分３２が形成されない第１
ばね部材２０が用いられても所期の目的を達成すること
ができる。According to this embodiment, the resonator 22 can be firmly and easily fixed by the first spring member 20 and the second spring member 24. Also, since the interval A (FIG. 3) can be easily changed, the filter characteristics can be easily adjusted. The third spring portion 32 of the first spring member 20 is formed mainly for the purpose of further stabilizing the ground connection, but is not necessarily formed. That is,
The first without the third spring portion 32 as shown in FIG.
Even if the spring member 20 is used, the intended purpose can be achieved.
【００１６】また、上述の実施例では、λ／２共振器２
２を２つ用いた２段のフィルタの例を示したが、１段あ
るいは３段以上のフィルタにも適用可能であるし、また
λ／４共振器にも適用可能である。In the above embodiment, the λ / 2 resonator 2
An example of a two-stage filter using two 2 has been described. However, the present invention can be applied to a one-stage or three-stage or more filter, and also to a λ / 4 resonator.
【図１】この考案の一実施例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of the present invention.
【図２】図１におけるII−II線断面図である。FIG. 2 is a sectional view taken along line II-II in FIG.
【図３】図１の実施例の分解斜視図である。FIG. 3 is an exploded perspective view of the embodiment of FIG.
【図４】図１の実施例の等価回路図である。FIG. 4 is an equivalent circuit diagram of the embodiment of FIG.
【図５】第１ばね部材の変形例を示す斜視図である。FIG. 5 is a perspective view showing a modification of the first spring member.
【図６】従来技術を示す分解斜視図である。FIG. 6 is an exploded perspective view showing a conventional technique.
【図７】従来技術を示す断面図である。FIG. 7 is a sectional view showing a conventional technique.
１０ …誘電体フィルタ １２ …ケース １６ …コネクタ ２０ …第１ばね部材 ２２ …共振器 ２４ …第２ばね部材 ２６ …蓋 ２８ …第１ばね部分 ３０ …第２ばね部分 ４８ …コンデンサ DESCRIPTION OF SYMBOLS 10 ... Dielectric filter 12 ... Case 16 ... Connector 20 ... 1st spring member 22 ... Resonator 24 ... 2nd spring member 26 ... Lid 28 ... 1st spring part 30 ... 2nd spring part 48 ... Condenser
Claims (1)
記ケースに取り付けられる蓋、前記ケース内に第１ばね
部材によって固定的に収納される円筒形同軸共振器、お
よび前記蓋と前記共振器との間に介挿される第２ばね部
材を備える誘電体フィルタにおいて、 前記第１ばね部材は前記共振器を挟持するＵ字状の第１
ばね部分と、前記第１ばね部分の両端部から外方へ延び
て形成され、かつ、前記ケースの内面に対して弾性的に
圧接されて前記共振器をその軸芯方向へ押圧する第２ば
ね部分とを含むことを特徴とする、誘電体フィルタ。1. A case whose inner surface is formed in a U-shape, a lid attached to the case, a cylindrical coaxial resonator fixedly accommodated in the case by a first spring member, and the lid and the lid. A dielectric filter including a second spring member interposed between the resonator and the resonator, wherein the first spring member has a U-shaped first shape sandwiching the resonator.
A spring portion and a second spring formed to extend outward from both ends of the first spring portion and elastically pressed against the inner surface of the case to press the resonator in its axial direction. And a dielectric filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991024083U JP2539828Y2 (en) | 1991-04-12 | 1991-04-12 | Dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991024083U JP2539828Y2 (en) | 1991-04-12 | 1991-04-12 | Dielectric filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04121101U JPH04121101U (en) | 1992-10-29 |
| JP2539828Y2 true JP2539828Y2 (en) | 1997-07-02 |
Family
ID=31909112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991024083U Expired - Lifetime JP2539828Y2 (en) | 1991-04-12 | 1991-04-12 | Dielectric filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2539828Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR112015014309A2 (en) * | 2012-12-20 | 2017-07-11 | Koninklijke Philips Nv | resonance container and magnetic resonance examination system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59121907U (en) * | 1983-02-07 | 1984-08-16 | 株式会社村田製作所 | High frequency equipment using dielectric coaxial resonators |
| JPS63126301A (en) * | 1986-11-15 | 1988-05-30 | Murata Mfg Co Ltd | Fixed structure for dielectric coaxial resonator |
-
1991
- 1991-04-12 JP JP1991024083U patent/JP2539828Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04121101U (en) | 1992-10-29 |
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