JP2002158513A - Dielectric resonator device - Google Patents

Dielectric resonator device

Info

Publication number
JP2002158513A
JP2002158513A JP2001052811A JP2001052811A JP2002158513A JP 2002158513 A JP2002158513 A JP 2002158513A JP 2001052811 A JP2001052811 A JP 2001052811A JP 2001052811 A JP2001052811 A JP 2001052811A JP 2002158513 A JP2002158513 A JP 2002158513A
Authority
JP
Japan
Prior art keywords
screw
dielectric resonator
frequency
resonator device
screw hole
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
JP2001052811A
Other languages
Japanese (ja)
Other versions
JP4369068B2 (en
Inventor
Hideo Hashimoto
秀生 橋本
Takehito Kuno
竹仁 久野
Yutaka Ozawa
裕 小澤
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.)
Maspro Denkoh Corp
Original Assignee
Maspro Denkoh Corp
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 Maspro Denkoh Corp filed Critical Maspro Denkoh Corp
Priority to JP2001052811A priority Critical patent/JP4369068B2/en
Publication of JP2002158513A publication Critical patent/JP2002158513A/en
Application granted granted Critical
Publication of JP4369068B2 publication Critical patent/JP4369068B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To reduce component costs and to shorten time for controlling resonance frequency using a frequency control screw. SOLUTION: A dielectric resonator system 1 is configured by providing a screw hole 3 on the upper surface of a conductive shield 2, which covers a dielectric resonator 5, and fastening a frequency control screw 4 into the screw hole 3. A screw head equally forming a pressure side flank angle, and idle side flank angle is engraved around all the periphery of the frequency control screw 4 and on the top of the screw head, a groove is provided along with that screw head top.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、誘電体共振器装置
に関し、特に、ねじにより共振周波数の調整が可能な誘
電体共振器を備えた誘電体共振器装置に関する。
The present invention relates to a dielectric resonator device, and more particularly, to a dielectric resonator device having a dielectric resonator whose resonance frequency can be adjusted by a screw.

【0002】[0002]

【従来の技術】従来の、ねじにより共振周波数の調整が
可能な誘電体共振器装置(以後、従来の誘電体共振器装
置とする)としては、例えば実公平7−1847号公報
に記載されたものがある。この誘電体共振器装置は、調
整ネジの回動により、金属製シールド体内に設置した誘
電体共振器の上面と調整ネジとの間隔を変えることによ
って共振周波数を調整するが、その時、調整ネジとして
タッピングネジを用いて、ネジ溝を刻みながら金属製シ
ールド体の上面に設けたネジ孔に螺入し、ネジ孔のタッ
プ加工を省くと共に、がたつきを抑えて周波数調整の容
易化を図っている。また、ネジ部分に樹脂(たとえばエ
ポキシなど)を付着させた樹脂加工ネジを用いてネジ孔
に螺合し、樹脂とネジ孔との摩擦によりがたつきを解消
して共振周波数を調整する誘電体共振器装置や、その
他、調整ネジとロックナットを組合せて取付けることに
より調整ネジを締結し共振周波数の調整を行う誘電体共
振器装置が、従来の誘電体共振器装置として知られてい
る。
2. Description of the Related Art A conventional dielectric resonator device whose resonance frequency can be adjusted by a screw (hereinafter referred to as a conventional dielectric resonator device) is described in, for example, Japanese Utility Model Publication No. 7-1847. There is something. This dielectric resonator device adjusts the resonance frequency by changing the distance between the adjustment screw and the upper surface of the dielectric resonator installed in the metal shield by turning the adjustment screw. Using a tapping screw, screw into the screw hole provided on the upper surface of the metal shield body while cutting the screw groove, eliminating the tapping of the screw hole, suppressing rattling and facilitating frequency adjustment. I have. A dielectric material that is screwed into a screw hole using a resin-processed screw having a resin (for example, epoxy or the like) adhered to the screw portion, to eliminate rattling due to friction between the resin and the screw hole, and to adjust a resonance frequency. 2. Description of the Related Art A resonator device and a dielectric resonator device that adjusts a resonance frequency by attaching an adjustment screw and a lock nut in combination to adjust a resonance frequency are known as conventional dielectric resonator devices.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、これら
の従来の誘電体共振器装置は、調整ネジとしてタッピン
グネジを使用するものの場合、一度そのネジを抜く方向
へ回すと、雌雄ネジの噛み合いが緩み、保持力が劣化す
るため、最終的には、調整ネジとネジ孔に接着剤等をつ
け、両者を固定してがたつきを抑えるという余計な手間
が発生し、調整時間が長くかかっていた。加えて、タッ
ピングネジによるねじ立て時の金属の切粉が金属製シー
ルド体内に落下した時には、回路の電気的短絡を引き起
す恐れがあり、機器の故障を招くことがあった。また、
調整ネジとして樹脂加工ネジを使用するものの場合に
は、部品コストが高くなっていた。そして、ロックナッ
トを使用する場合には、調整ネジの他にロックナット分
のコスト上昇は避けられず、さらに共振周波数調整に
は、調整ネジ及びロックナットによる2段階の調整の手
間が必要となり、その調整には長時間を要していた。
However, in these conventional dielectric resonator devices, when a tapping screw is used as an adjusting screw, once the screw is turned in the pulling-out direction, the engagement between the female screw and the male screw is loosened. Since the holding force is deteriorated, the adjustment screw and the screw hole are finally attached with an adhesive and the like, and the extra work is required to fix the two and suppress the rattling, and the adjustment time is long. In addition, when metal chips from the tapping screw when the metal chips fall into the metal shield body, an electrical short circuit may be caused, which may lead to a failure of the device. Also,
In the case of using a resin-processed screw as the adjusting screw, the component cost is increased. When a lock nut is used, an increase in the cost of the lock nut in addition to the adjustment screw is unavoidable, and furthermore, the resonance frequency adjustment requires two-step adjustment with the adjustment screw and the lock nut. The adjustment took a long time.

【0004】こうした問題に鑑み、本発明は、部品コス
トを削減し、周波数調整ネジによる共振周波数の調整時
間を短縮する誘電体共振器装置の提供を課題とする。
[0004] In view of these problems, an object of the present invention is to provide a dielectric resonator device that reduces the cost of parts and shortens the time for adjusting the resonance frequency by the frequency adjustment screw.

【0005】[0005]

【課題を解決するための手段】請求項1の発明による誘
電体共振器装置は、誘電体共振器を覆う導電性シールド
体にネジ孔を設け、ネジ孔に周波数調整ネジを螺合し
て、前記誘電体共振器と前記周波数調整ネジの先端部と
の間隔を変化させ、共振周波数を調整可能とする誘電体
共振器装置において、前記周波数調整ネジは、ねじ山の
山頂に、該山頂に沿って溝を有して構成される。
According to a first aspect of the present invention, there is provided a dielectric resonator device, wherein a conductive shield covering the dielectric resonator is provided with a screw hole, and a frequency adjusting screw is screwed into the screw hole. In the dielectric resonator device in which the distance between the dielectric resonator and the tip of the frequency adjusting screw is changed to adjust the resonance frequency, the frequency adjusting screw may be mounted on the crest of the screw thread along the crest. It has a groove.

【0006】請求項2の発明による誘電体共振器装置
は、前記周波数調整ネジのネジ部または前記導電性シー
ルド体のネジ孔は、その断面形状が非円形であり、前記
ネジ部または前記ネジ孔の中心軸から前記ねじ山の山頂
までの距離が最大値となる最大径部が円周方向の複数箇
所に設けられて構成される。
According to a second aspect of the present invention, in the dielectric resonator device, the screw portion of the frequency adjusting screw or the screw hole of the conductive shield has a non-circular cross-sectional shape, and the screw portion or the screw hole. The maximum diameter portion where the distance from the center axis of the screw thread to the crest of the screw thread becomes the maximum value is provided at a plurality of positions in the circumferential direction.

【0007】請求項3の発明による誘電体共振器装置
は、前記最大径部は、円周方向の等角度箇所に設けられ
て構成される。
In the dielectric resonator device according to a third aspect of the present invention, the maximum diameter portion is provided at an equiangular position in a circumferential direction.

【0008】請求項4の発明による誘電体共振器装置
は、前記最大径部は、円周方向の3箇所に設けられて構
成される。
In a dielectric resonator device according to a fourth aspect of the present invention, the maximum diameter portion is provided at three locations in a circumferential direction.

【0009】請求項5の発明による誘電体共振器装置
は、前記ねじ山の谷底近傍が、フランクの延長面から内
側にえぐり取られた形状の広底凹部として成形され構成
される。
In the dielectric resonator device according to a fifth aspect of the present invention, the vicinity of the root of the thread is formed as a wide-bottom concave portion cut out inward from the extension surface of the flank.

【0010】請求項6の発明による誘電体共振器装置
は、導電性シールド体に周波数調整ネジを複数本設けて
構成される。
A dielectric resonator device according to a sixth aspect of the present invention is constructed by providing a conductive shield with a plurality of frequency adjusting screws.

【0011】[0011]

【発明の実施の形態】以下に、本発明の実施の形態を図
面に基づいて説明する。なお、以下各図中の同一又は類
似する構成要素には同一の符号を付す。図1は、本発明
に係る誘電体共振器装置の第一実施形態を示す断面図で
ある。本誘電体共振器装置1は、誘電体共振器5を導電
性シールド体2内に備え、その導電性シールド体2の上
面のネジ孔3に、周波数調整ネジ4を螺合して構成され
る。図2は、図1の誘電体共振器装置1のネジ孔3と周
波数調整ネジ4との螺合を示し、軸線を含む拡大断面図
である。周波数調整ネジ4には圧力側フランク角と遊び
側フランク角とを等しく形成したねじ山14が全周に刻
設され、その山頂25に沿って溝幅tの溝26が設けら
れる。
Embodiments of the present invention will be described below with reference to the drawings. Hereinafter, the same or similar components in the respective drawings are denoted by the same reference numerals. FIG. 1 is a sectional view showing a first embodiment of the dielectric resonator device according to the present invention. The dielectric resonator device 1 includes a dielectric resonator 5 in a conductive shield 2, and a frequency adjusting screw 4 is screwed into a screw hole 3 on the upper surface of the conductive shield 2. . FIG. 2 is an enlarged cross-sectional view showing the screwing of the screw hole 3 and the frequency adjusting screw 4 of the dielectric resonator device 1 of FIG. 1 and including the axis. The frequency adjusting screw 4 is provided with a thread 14 having the same flank angle as the pressure side flank angle and the play side flank angle, and is provided with a groove 26 having a groove width t along the crest 25 thereof.

【0012】ねじ山14は所望のピッチPを有するよう
に形成される。また、ねじ山14の両側のフランク24
の交差する角度であるフランク角Aも所望の値になるよ
うに成形される。フランク角Aは通常60度に設定され
る。ねじの有効径D(ねじ山の中央高さ)の位置が2点
鎖線によって示されている。ねじ山14の谷部は有効径
Dより谷底側において、フランク24の延長面から内側
にえぐり取った形状の広底凹部33として成形されてい
る。広底凹部33の底面は従来のねじ溝より広く比較的
平坦に成形されている。また、広底凹部33の側面32
がフランク24と交差する角度はフランク角Aよりも小
さく設定される。フランク角Aが60度の場合、側面3
2の公差角は例えば20度〜40度(好ましく25度〜
35度)とされる。側面32の公差角が小さいため、広
底凹部33はねじ山14の横断面においてほぼ矩形状を
呈する。
The threads 14 are formed to have a desired pitch P. The flanks 24 on both sides of the thread 14
Are formed so that the flank angle A, which is the angle at which they intersect, also has a desired value. The flank angle A is usually set to 60 degrees. The position of the effective diameter D (central height of the thread) of the screw is indicated by a two-dot chain line. The valley portion of the thread 14 is formed as a wide-bottom concave portion 33 having a shape that is cut inward from the extension surface of the flank 24 on the valley bottom side from the effective diameter D. The bottom surface of the wide-bottom concave portion 33 is formed to be relatively flat wider than a conventional screw groove. Also, the side surface 32 of the wide-bottom concave portion 33
Is set to be smaller than the flank angle A. When the flank angle A is 60 degrees, the side surface 3
2 is, for example, 20 to 40 degrees (preferably 25 to
35 degrees). Due to the small tolerance angle of the side surface 32, the wide-bottom concave portion 33 has a substantially rectangular shape in the cross section of the thread 14.

【0013】そして、ねじ山14の溝26は、ネジ孔3
に刻設されたねじ山13の斜面部分であるフランク23
と周波数調整ネジ4に刻設されたねじ山14の斜面部分
であるフランク24とが、溝26を閉じる方向の力と、
溝26の弾性による反発力とのバランスを保ちながら接
触するように形成される。
The groove 26 of the screw thread 14 is
Flank 23 which is the slope of thread 13 engraved on
And a flank 24 which is a slope portion of the screw thread 14 engraved on the frequency adjusting screw 4, a force in a direction to close the groove 26,
The grooves 26 are formed so as to be in contact with each other while maintaining a balance with the repulsive force due to the elasticity of the grooves 26.

【0014】共振周波数の調整は、周波数調整ネジ4を
回動して上下に動かすことにより誘電体共振器5との間
隙dを変化させて行う。この時、周波数調整ネジ4のフ
ランク24とネジ孔3のフランク23との接触面では、
隙間や緩みの無い締結状態を維持するように、弾性応力
と接触による摩擦抵抗が発生しており、周波数調整ネジ
4はネジ孔3への締め込み時、常に所定の締結力を持っ
た締結状態になる。このような状態で、振動や衝撃的な
外力が加わっても、ネジ孔3のねじ山13と周波数調整
ネジ4のねじ山14との間には相対すべりが生じなくな
り、周波数調整ネジ4のがたつきや緩みを防ぐと共に、
山頂25に設けた溝26がそれらの外力を逃がす役目を
するため、安定した締結状態を長期間保持可能である。
なお、本誘電体共振器装置1において、周波数調整ネジ
4と誘電体共振器5との間隙dに対する共振周波数fa
の変化率fa/dは、略100kHz/μmである。
The adjustment of the resonance frequency is performed by changing the gap d with the dielectric resonator 5 by rotating the frequency adjustment screw 4 up and down. At this time, at the contact surface between the flank 24 of the frequency adjusting screw 4 and the flank 23 of the screw hole 3,
A frictional resistance is generated due to elastic stress and contact so as to maintain a fastening state without a gap or looseness. When the frequency adjusting screw 4 is tightened into the screw hole 3, the fastening state always has a predetermined fastening force. become. In such a state, even if vibration or impact external force is applied, relative slip does not occur between the screw thread 13 of the screw hole 3 and the screw thread 14 of the frequency adjusting screw 4, and the frequency adjusting screw 4 While preventing rattling and loosening,
Since the groove 26 provided on the peak 25 serves to release those external forces, a stable fastening state can be maintained for a long time.
In the dielectric resonator device 1, the resonance frequency fa with respect to the gap d between the frequency adjusting screw 4 and the dielectric resonator 5 is determined.
Is approximately 100 kHz / μm.

【0015】また、ねじ山14の谷底近傍に広底凹部3
3を設けると、ねじ素材の材料はねじ山14の山頂部に
向かって塑性移動するために、広底凹部33がない場合
よりも溝26の深さが深く形成される。したがって、フ
ランクが弾性変形し易くなり締結効果が向上する。さら
に、ねじ山14の谷底部が広底凹部33として広くとら
れており曲率が比較的滑らかに変化するため、谷底部に
応力集中が生じにくく、応力破壊や疲労破壊が発生しに
くくなる。
The wide-bottom concave portion 3 is located near the root of the thread 14.
When 3 is provided, since the material of the screw material plastically moves toward the crest of the screw thread 14, the depth of the groove 26 is formed deeper than when the wide-bottom concave portion 33 is not provided. Therefore, the flank is easily elastically deformed, and the fastening effect is improved. Furthermore, since the root of the thread 14 is widened as the wide-bottom concave portion 33 and the curvature changes relatively smoothly, stress concentration hardly occurs at the root, and stress fracture and fatigue fracture hardly occur.

【0016】特開平8−177839号公報には、ねじ
山の両方のフランク角を相違させた緩み防止ネジが開示
されているが、完全に締め付けない状態では、軸線方向
のスプリングバック作用によりネジが緩む可能性があっ
た。これに対し、本発明に係る周波数調整ネジ4では、
両方のフランク角が等しくなっているので、完全に締め
付けていない調整位置であっても緩むおそれは無い。
Japanese Patent Application Laid-Open No. H8-177839 discloses a loosening prevention screw in which both flank angles of a screw thread are different. However, when the screw is not completely tightened, the screw is actuated by an axial spring back action. Could loosen. On the other hand, in the frequency adjusting screw 4 according to the present invention,
Since both flank angles are equal, there is no risk of loosening even in the adjustment position where the flank angle is not completely tightened.

【0017】したがって、本実施形態の誘電体共振器装
置1によれば、周波数調整ネジ4のネジ孔3への螺合
時、常時締結状態の維持が可能となるから、周波数調整
ネジ4だけの単部品で、他に締結処理をすること無く周
波数調整ネジ4の先端部と誘電体共振器5との間隔を一
定に固持でき、共振周波数の調整が完了可能となる。よ
って、部品点数が減り、コストが削減でき、調整時間を
短くすることができる。また、タッピングネジを使用す
る時のような切粉もほとんど発生しないので、切粉によ
る短絡故障も防止可能である。さらに、周波数調整ネジ
4は繰り返しのねじ込み使用にも耐え、締結効果が減衰
しにくいので誘電体共振器装置1自体の耐久性が向上す
る。また、締結の為の接着剤や樹脂加工等が不要のた
め、さらに製造コストを低減できる。
Therefore, according to the dielectric resonator device 1 of the present embodiment, when the frequency adjusting screw 4 is screwed into the screw hole 3, it is possible to always maintain the fastening state. The distance between the tip of the frequency adjustment screw 4 and the dielectric resonator 5 can be fixed at a constant value without any other fastening processing using a single component, and the adjustment of the resonance frequency can be completed. Therefore, the number of parts can be reduced, the cost can be reduced, and the adjustment time can be shortened. In addition, since chips are hardly generated as in the case of using a tapping screw, short circuit failure due to chips can be prevented. Further, the frequency adjusting screw 4 withstands repeated screw-in use, and the fastening effect is hardly attenuated, so that the durability of the dielectric resonator device 1 itself is improved. In addition, since an adhesive or resin processing for fastening is not required, the manufacturing cost can be further reduced.

【0018】図3は、本発明に係る誘電体共振器装置1
の第二実施形態を示す断面図であり、図4は、ネジ孔3
と周波数調整ネジ4との螺合状態を示す図3のA−A線
断面図である。この周波数調整ネジ4のネジ部6の断面
形状は非円形であり、3面が外側に膨らんだ略三角形を
呈している。ネジ部6の中心軸からネジ部6の外周(ね
じ山の先端部)までの距離は、最大径部11において最
大値となり、最小径部12において最小値となる。最大
径部11はネジ部6の周方向に120度の等角度毎に3
箇所設けられている。最小径部12もネジ部6の周方向
に120度の等角度毎に3箇所設けられている。最小径
部12は最大径部11と最大径部11の中間角度位置に
ある。そして3箇所の最大径部11付近にはねじ山14
が形成されている。
FIG. 3 shows a dielectric resonator device 1 according to the present invention.
FIG. 4 is a sectional view showing a second embodiment of the present invention, and FIG.
FIG. 4 is a sectional view taken along line AA of FIG. The cross-sectional shape of the screw portion 6 of the frequency adjusting screw 4 is non-circular, and has a substantially triangular shape with three surfaces bulging outward. The distance from the central axis of the screw portion 6 to the outer periphery (the tip of the screw thread) of the screw portion 6 has a maximum value at the maximum diameter portion 11 and a minimum value at the minimum diameter portion 12. The maximum diameter portion 11 is 3 at every equal angle of 120 degrees in the circumferential direction of the screw portion 6.
It is provided in places. Three minimum diameter portions 12 are also provided at equal angles of 120 degrees in the circumferential direction of the screw portion 6. The minimum diameter portion 12 is located at an intermediate angular position between the maximum diameter portion 11 and the maximum diameter portion 11. In the vicinity of the three maximum diameter portions 11, screw threads 14 are provided.
Are formed.

【0019】ネジ部6の中心軸から最大径部11までの
距離と、中心軸から最小径部12までの距離との比は、
約1:0.8である。これら距離の比は、1:(0.7
〜0.9)とすることが好ましい。また、ネジ部6の中
心軸から3箇所の最大径部11までの距離は全て等し
い。ただし、ネジ部6の中心軸から3箇所の最小径部1
2までの距離は必ずしも全て等しくする必要はない。
The ratio of the distance from the central axis of the screw portion 6 to the maximum diameter portion 11 and the distance from the central axis to the minimum diameter portion 12 is:
It is about 1: 0.8. The ratio of these distances is 1: (0.7
To 0.9). The distances from the central axis of the screw portion 6 to the three maximum diameter portions 11 are all equal. However, three minimum diameter portions 1 from the central axis of the screw portion 6
The distances to 2 need not all be equal.

【0020】ネジ部6の外周における最大径部11の数
は、3箇所に限らず4箇所、5箇所等の複数であっても
良いが、偶数よりも奇数の方が好ましい。また製造上の
容易さ及びネジ孔3との適合性からは、3箇所設けて略
三角形とすることが最も好ましい。また、ねじ山14は
ネジ部6の最大径部11付近だけでなく全周に設けても
良い。なお、ねじ山14の山頂25には、第一実施形態
と同様の溝26が形成されている。
The number of the maximum diameter portions 11 on the outer periphery of the screw portion 6 is not limited to three, but may be plural such as four or five, but an odd number is preferable to an even number. In addition, from the viewpoint of ease of manufacture and compatibility with the screw hole 3, it is most preferable to provide three places and make a substantially triangular shape. Further, the thread 14 may be provided not only in the vicinity of the maximum diameter portion 11 of the screw portion 6 but also in the entire circumference. In addition, a groove 26 similar to that of the first embodiment is formed in the crest 25 of the screw thread 14.

【0021】この第二実施形態の誘電体共振器装置1に
よれば、ネジ部6の断面形状を略三角形に形成すること
により、ネジ孔3とネジ部6とが全周で接することなく
3箇所で点接触する。このため、締結力が3つの接触点
に集中し、周波数調整ネジ4の保持力が増し、複数回調
整を行った後であっても周波数調整ネジ4の緩みが防止
され、周波数変動を抑えることができる。また摩擦が小
さくなり螺入がスムーズになるため、周波数の調整が容
易になる。
According to the dielectric resonator device 1 of the second embodiment, by forming the cross-sectional shape of the screw portion 6 into a substantially triangular shape, the screw hole 3 and the screw portion 6 do not come into contact with each other all around. Point contact at a point. For this reason, the fastening force concentrates on the three contact points, the holding force of the frequency adjustment screw 4 increases, and the frequency adjustment screw 4 is prevented from loosening even after performing the adjustment a plurality of times, thereby suppressing the frequency fluctuation. Can be. In addition, since the friction is reduced and the screwing is smooth, the frequency can be easily adjusted.

【0022】上記作用効果を、図5に示す実験結果に従
って確認する。この実験では、ネジ部の断面を円形状と
した第一実施形態の周波数調整ネジ(第1実施品)と、
略三角形状とした第二実施形態の周波数調整ネジ(第2
実施品)とを夫々同じ構造の導電性シールド体のネジ部
に螺合し、周波数調整回数に対するねじ込みトルクと調
整周波数の変動値とを比較した。なお、ねじ込みトルク
は周波数調整ネジをネジ孔にねじ込む時のトルクメータ
による回転トルクの測定値であり、周波数変動値は6時
間の振動試験後の共振周波数の変動値である。この結果
から、第1実施品では、調整回数の増加に伴い、ねじ込
みトルクが小さくなることで周波数調整は容易にはなる
けれども、周波数変動が調整回数に比例して大きくなり
調整5回目で規格値を上回ってしまう。これに対し、第
2実施品では、調整回数の増加に伴い、ねじ込みトルク
が小さくなって調整が容易になるのに加え、10回程度
では緩み防止性能が低下しないため周波数変動がほとん
ど無いことがわかる。
The above operation and effect will be confirmed in accordance with the experimental results shown in FIG. In this experiment, the frequency adjusting screw (first embodiment) of the first embodiment in which the cross section of the screw portion was circular,
The frequency adjusting screw (second
) Was screwed into the screw portion of the conductive shield having the same structure, and the screwing torque with respect to the frequency adjustment frequency and the fluctuation value of the adjustment frequency were compared. The screwing torque is a measured value of the rotation torque by a torque meter when the frequency adjusting screw is screwed into the screw hole, and the frequency fluctuation value is a fluctuation value of the resonance frequency after the vibration test for 6 hours. From this result, in the first embodiment, the frequency adjustment becomes easy by reducing the screwing torque with the increase in the number of adjustments, but the frequency fluctuation increases in proportion to the number of adjustments, and the standard value is obtained at the fifth adjustment. Will be exceeded. On the other hand, in the second embodiment, as the number of adjustments increases, the screwing torque decreases and the adjustment becomes easy. In addition, the loosening prevention performance does not decrease after about 10 times, so that there is almost no frequency fluctuation. Understand.

【0023】図6は、第二実施形態の変更例を示す断面
図である。ここでは、導電性シールド体2の上面に粗調
整用の大径周波数調整ネジ4と微調整用の小径周波数調
整ネジ4aとが螺入されるネジ孔3及び3aが設けられ
ている。両周波数調整ネジ4及び4aのネジ部は、その
断面形状が図4に示したネジ部6と同様に略三角形に形
成されている。
FIG. 6 is a sectional view showing a modification of the second embodiment. Here, screw holes 3 and 3a into which a large-diameter frequency adjustment screw 4 for coarse adjustment and a small-diameter frequency adjustment screw 4a for fine adjustment are screwed are provided on the upper surface of the conductive shield body 2. The thread portions of both frequency adjusting screws 4 and 4a are formed in a substantially triangular shape in cross section, similarly to the thread portion 6 shown in FIG.

【0024】このような誘電体共振器装置1によれば、
ネジ部の断面形状を略三角形に形成した2本の周波数調
整ネジ4及び4aを設けたので、周波数変動が無く、周
波数調整が容易なことに加え、大径周波数調整ネジ4に
より粗調整を行ない、小径周波数調整ネジ4aにより微
調整を行なうなど、細かな周波数調整をより容易に行う
ことができる。
According to such a dielectric resonator device 1,
Since two frequency adjusting screws 4 and 4a having a substantially triangular cross section are provided, there is no frequency variation, frequency adjustment is easy, and coarse adjustment is performed by the large diameter frequency adjusting screw 4. Fine frequency adjustment can be performed more easily, for example, by performing fine adjustment using the small-diameter frequency adjustment screw 4a.

【0025】図7,8は第二実施形態のさらに別の変更
例を示している。図7のように、ネジ孔3は導電性シー
ルド体2の内側からバーリング加工して形成しても良
い。図8のように、ナット状の別体部品を嵌めてネジ孔
3を形成しても良い。また図6のように、導電性シール
ド体2自身の板厚を利用してネジ孔3を設けても良い。
FIGS. 7 and 8 show still another modification of the second embodiment. As shown in FIG. 7, the screw hole 3 may be formed by burring from the inside of the conductive shield 2. As shown in FIG. 8, a screw hole 3 may be formed by fitting a nut-shaped separate component. As shown in FIG. 6, the screw hole 3 may be provided by utilizing the thickness of the conductive shield 2 itself.

【0026】なお、本発明は上記実施形態に限定される
ものではない。以上の実施形態では周波数調整ネジ4の
ネジ部6に適用する場合を説明したが、導電性シールド
体2のネジ孔3に適用することもできる。ネジ孔3に適
用する場合は、ネジ孔3の断面形状を非円形とすれば良
い。また例えば、周波数調整ネジ4の山頂25の溝26
は、その断面形状をV字状、U字状或いは略コ字状等に
形成して設けても良く、また1山毎、2山毎等の任意の
ねじ山に設ける等、断続的に設けても良い。
The present invention is not limited to the above embodiment. In the above embodiment, the case where the present invention is applied to the screw portion 6 of the frequency adjusting screw 4 has been described. However, the present invention can be applied to the screw hole 3 of the conductive shield 2. When applied to the screw hole 3, the sectional shape of the screw hole 3 may be non-circular. Also, for example, the groove 26 of the peak 25 of the frequency adjusting screw 4
May be provided in a V-shaped, U-shaped, or substantially U-shaped cross-sectional shape, or may be provided intermittently, such as provided on an arbitrary thread such as every single crest or every second crest. May be.

【0027】また、周波数調整ネジ4の材質は、鉄、ス
テンレス、銅、アルミニウム、真鍮などの導電性のある
金属に限定されず、ポリカーボネートなど電気絶縁物で
ある合成樹脂を用いることもできる。また、導電性のあ
る金属製ネジと合成樹脂製のネジとを併用しても良い。
この場合、導電性金属ネジは誘電体共振器との間隙を狭
くすると、周波数が高くなり、合成樹脂製ネジは、逆
に、周波数が低くなる傾向にあるので、周波数の調整範
囲を広げることができる。
The material of the frequency adjusting screw 4 is not limited to a conductive metal such as iron, stainless steel, copper, aluminum and brass, and a synthetic resin which is an electric insulator such as polycarbonate can be used. Further, a conductive metal screw and a synthetic resin screw may be used in combination.
In this case, when the gap between the conductive metal screw and the dielectric resonator is narrowed, the frequency increases.On the contrary, the frequency of the synthetic resin screw tends to decrease. it can.

【0028】さらに、導電性シールド体2は、鉄(軟
鉄、硬鉄)、アルミニウム、銅(軟銅、硬銅)、真鍮、
亜鉛ダイカスト、アルミダイカスト、マグネシウム合金
等の導電性金属で形成することはもちろん、その表面を
例えばクロム酸等で腐食防止処理しても良い。また、導
電性シールド体2を合成樹脂で成形し、その表面を導電
性材料でメッキや蒸着処理等しても良い。
Further, the conductive shield 2 is made of iron (soft iron, hard iron), aluminum, copper (soft copper, hard copper), brass,
The surface may be formed of a conductive metal such as zinc die-cast, aluminum die-cast, or magnesium alloy, or its surface may be subjected to a corrosion prevention treatment with, for example, chromic acid. Alternatively, the conductive shield 2 may be formed of a synthetic resin, and the surface thereof may be plated or vapor-deposited with a conductive material.

【0029】その他、導電性シールド体2の形状を立方
体型、かまぼこ型、おわん型等に形成したり、誘電体共
振器5の向きを変更し、これと相対する導電性シールド
体2の側面等にネジ孔3を形成したり、周波数調整ネジ
4の頭部を、なべ、さら、丸、丸さら或いは六角等の形
状や、すりわり付きや十字穴付等にするなど、本発明の
趣旨を逸脱しない範囲で各部の形状並びに構成を適宜に
変更して実施することも可能である。
In addition, the shape of the conductive shield 2 is formed into a cubic shape, a kamaboko shape, a bowl shape, or the like, the direction of the dielectric resonator 5 is changed, and the side surface of the conductive shield 2 opposed to the shape is formed. The purpose of the present invention, such as forming a screw hole 3 in the head, or making the head of the frequency adjusting screw 4 a pan, a flat, a round, a round or a hexagon, or a slotted or cross-shaped hole, etc. The shape and configuration of each part can be changed as appropriate without departing from the scope of the present invention.

【0030】[0030]

【発明の効果】以上詳述したように、請求項1の発明に
よれば、周波数調整ネジ単体でネジ孔とのがたつきや緩
みの無い締結状態を常時維持できるから、最小部品点数
で共振周波数調整が可能となり部品コストを削減するこ
とができ、加えて、周波数調整ネジを回すだけで共振周
波数の調整を完了させることが可能となり,調整時間を
短縮できる。
As described above in detail, according to the first aspect of the present invention, the frequency adjusting screw alone can always maintain the tightened state without rattling or loosening with the screw hole. The frequency can be adjusted and the cost of parts can be reduced. In addition, the adjustment of the resonance frequency can be completed only by turning the frequency adjusting screw, and the adjustment time can be reduced.

【0031】請求項2、3及び4の発明によれば、ネジ
部またはネジ孔を断面非円形に形成したので、周波数調
整ネジの保持力を複数の接触点に集中させて増加させ、
緩み止め効果を高めることができる。
According to the second, third and fourth aspects of the present invention, since the screw portion or the screw hole is formed to have a non-circular cross section, the holding force of the frequency adjusting screw is increased by concentrating on a plurality of contact points.
The loosening effect can be enhanced.

【0032】請求項5の発明によれば、ねじ山の谷底近
傍に広底凹部を設けたので、ねじ山の山頂の溝を深く形
成して、ねじの緩み防止性能を向上できる。
According to the fifth aspect of the present invention, since the wide-bottom concave portion is provided near the root of the thread, the groove at the top of the thread can be formed deep, and the performance of preventing the screw from loosening can be improved.

【0033】請求項6の発明によれば、複数本の周波数
調整ネジを設けたので、共振周波数の微調整を容易に行
なうことができる。
According to the sixth aspect of the present invention, since a plurality of frequency adjusting screws are provided, fine adjustment of the resonance frequency can be easily performed.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の第一実施形態を示す誘電体共振器装置
の断面図である。
FIG. 1 is a sectional view of a dielectric resonator device according to a first embodiment of the present invention.

【図2】図1の要部拡大断面図である。FIG. 2 is an enlarged sectional view of a main part of FIG.

【図3】本発明の第二実施形態を示す誘電体共振器装置
の断面図である。
FIG. 3 is a sectional view of a dielectric resonator device according to a second embodiment of the present invention.

【図4】図3のA−A線断面図である。FIG. 4 is a sectional view taken along line AA of FIG. 3;

【図5】ねじ込みトルク特性及び周波数変動特性を示す
グラフである。
FIG. 5 is a graph showing screwing torque characteristics and frequency fluctuation characteristics.

【図6】第二実施形態の変更例を示す断面図である。FIG. 6 is a sectional view showing a modification of the second embodiment.

【図7】第二実施形態の別の変更例を示す断面図であ
る。
FIG. 7 is a sectional view showing another modification of the second embodiment.

【図8】第二実施形態のさらに別の変更例を示す断面図
である。
FIG. 8 is a sectional view showing still another modified example of the second embodiment.

【符号の説明】[Explanation of symbols]

1・・誘電体共振器装置、2・・導電性シールド体、
3,3a・・ネジ孔、4,4a・・周波数調整ネジ、5
・・誘電体共振器、6・・ネジ部、11・・最大径部、
13,14・・ねじ山、23,24・・フランク、25
・・山頂、26・・溝、33・・広底凹部。
1. Dielectric resonator device 2. Conductive shield,
3, 3a screw holes, 4, 4a frequency adjustment screws, 5
..Dielectric resonators, 6 screw sections, 11 maximum diameter sections,
13, 14 ... thread, 23, 24 ... flank, 25
··· Crest, 26 ·· groove, 33 ·· wide bottom recess.

フロントページの続き (72)発明者 小澤 裕 愛知県日進市浅田町上納80番地 マスプロ 電工株式会社内 Fターム(参考) 5J006 HC03 HC21 LA11 MA01 MB01 PA01 Continuation of the front page (72) Inventor Hiroshi Ozawa 80 Nogami, Asada-cho, Nisshin-shi, Aichi F-term (reference) in Maspro Denko Corporation 5J006 HC03 HC21 LA11 MA01 MB01 PA01

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 誘電体共振器を覆う導電性シールド体に
ネジ孔を設け、ネジ孔に周波数調整ネジを螺合して、前
記誘電体共振器と前記周波数調整ネジの先端部との間隔
を変化させ、共振周波数を調整可能とする誘電体共振器
装置において、前記周波数調整ネジは、ねじ山の山頂
に、該山頂に沿って溝を有することを特徴とする誘電体
共振器装置。
1. A screw hole is provided in a conductive shield body that covers a dielectric resonator, and a frequency adjustment screw is screwed into the screw hole to increase a distance between the dielectric resonator and a tip end of the frequency adjustment screw. A dielectric resonator device capable of changing and adjusting a resonance frequency, wherein the frequency adjusting screw has a groove on a crest of a screw thread along the crest.
【請求項2】 前記周波数調整ネジのネジ部または前記
導電性シールド体のネジ孔は、その断面形状が非円形で
あり、前記ネジ部または前記ネジ孔の中心軸から前記ね
じ山の山頂までの距離が最大値となる最大径部が円周方
向の複数箇所に設けられている請求項1記載の誘電体共
振器装置。
2. A screw portion of the frequency adjusting screw or a screw hole of the conductive shield body has a non-circular cross-sectional shape, and is formed from a central axis of the screw portion or the screw hole to a crest of the screw thread. 2. The dielectric resonator device according to claim 1, wherein a maximum diameter portion having a maximum distance is provided at a plurality of positions in a circumferential direction.
【請求項3】 前記最大径部は、円周方向の等角度箇所
に設けられている請求項2記載の誘電体共振器装置。
3. The dielectric resonator device according to claim 2, wherein the maximum diameter portion is provided at an equiangular position in a circumferential direction.
【請求項4】 前記最大径部は、円周方向の3箇所に設
けられている請求項3記載の誘電体共振器装置。
4. The dielectric resonator device according to claim 3, wherein the maximum diameter portion is provided at three positions in a circumferential direction.
【請求項5】 前記ねじ山の谷底近傍が、フランクの延
長面から内側にえぐり取られた形状の広底凹部として成
形されている請求項1乃至4記載の誘電体共振器装置。
5. The dielectric resonator device according to claim 1, wherein a portion near the root of the thread is formed as a wide-bottom concave portion cut out inward from an extension surface of the flank.
【請求項6】 導電性シールド体に周波数調整ネジを複
数本設けた請求項1乃至5記載の誘電体共振器装置。
6. The dielectric resonator device according to claim 1, wherein a plurality of frequency adjusting screws are provided on the conductive shield.
JP2001052811A 2000-09-05 2001-02-27 Dielectric resonator device Expired - Fee Related JP4369068B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001052811A JP4369068B2 (en) 2000-09-05 2001-02-27 Dielectric resonator device

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JP2000269174 2000-09-05
JP2000-269174 2000-09-05
JP2001052811A JP4369068B2 (en) 2000-09-05 2001-02-27 Dielectric resonator device

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Cited By (3)

* Cited by examiner, † Cited by third party
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JP2015227922A (en) * 2014-05-30 2015-12-17 コニカミノルタ株式会社 Lens holding member manufacturing method, and slide core mold, lens barrel, and imaging device for use in the manufacturing method
CN108656003A (en) * 2017-03-28 2018-10-16 京都机械工具株式会社 Locking tool

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US9633183B2 (en) 2009-06-19 2017-04-25 Uniloc Luxembourg S.A. Modular software protection

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Publication number Priority date Publication date Assignee Title
KR101122829B1 (en) 2010-12-17 2012-03-21 주식회사 에이스테크놀로지 Locking nut for tuning bolt in rf-filter
JP2015227922A (en) * 2014-05-30 2015-12-17 コニカミノルタ株式会社 Lens holding member manufacturing method, and slide core mold, lens barrel, and imaging device for use in the manufacturing method
CN108656003A (en) * 2017-03-28 2018-10-16 京都机械工具株式会社 Locking tool

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