JPH0135522B2 - - Google Patents
Info
- Publication number
- JPH0135522B2 JPH0135522B2 JP23663883A JP23663883A JPH0135522B2 JP H0135522 B2 JPH0135522 B2 JP H0135522B2 JP 23663883 A JP23663883 A JP 23663883A JP 23663883 A JP23663883 A JP 23663883A JP H0135522 B2 JPH0135522 B2 JP H0135522B2
- Authority
- JP
- Japan
- Prior art keywords
- shield case
- conductive screw
- conductive
- screw
- cylindrical bobbin
- 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
Links
- 238000005476 soldering Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/005—Helical resonators; Spiral resonators
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明はVHF・UHF帯で使用され、導電性の
螺子とヘリカルコイル間の容量を導電性螺子によ
つて可変し、周波数調整を行うヘリカルフイルタ
に関するものである。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a helical filter that is used in the VHF/UHF band and that adjusts the frequency by varying the capacitance between a conductive screw and a helical coil using the conductive screw. It is something.
従来例の構成とその問題点
一般にVHF帯やUHF帯の周波数帯では、ヘリ
カルフイルタの周波数特性の調整を行うのに導電
性螺子が使用されるが、導電性螺子が高電位にあ
ると、調整に用いるドライバーの影響で共振周波
数が変わり、周波数特性の調整が困難となるた
め、前記導電性螺子を接地して使用されることが
多い。導電性螺子を接地すれば電位が低くなり、
調整ドライバーの影響を受けることなく周波数調
整が可能となる。その時一般には導電性螺子をシ
ールドケースに接触させ、シールドケースを介し
て接地する手段が用いられている。Conventional configuration and its problems Conductive screws are generally used to adjust the frequency characteristics of helical filters in the VHF and UHF frequency bands, but when the conductive screws are at a high potential, the adjustment The resonant frequency changes due to the influence of the driver used, making it difficult to adjust the frequency characteristics, so the conductive screw is often used with the conductive screw grounded. If the conductive screw is grounded, the potential will be lowered,
Frequency adjustment becomes possible without being affected by the adjustment driver. At that time, a method is generally used in which a conductive screw is brought into contact with a shield case and grounded through the shield case.
以下図面を参照しながら従来のヘリカルフイル
タについて説明する。この種のヘリカルフイルタ
は第１図に示すように構成されていた。すなわ
ち、シールドケース１の天井面に第２図に示すよ
うな貫通孔にねじ２を設けた導電性のナツト３を
半田付け、圧着、接着などにより装着し、両者を
電気的に接触させ、前記ナツト３のねじ部２に導
電性螺子４を螺合させるとともに、ヘリカルコイ
ル５を巻回したプラスチツクからなる円筒状ボビ
ン６をシールドケース１内の導電性ナツト３の下
方に挿入することにより構成されていた。しか
も、前記導電性螺子４は導電性のナツト３によつ
てのみ保持され、電気的にシールドケース１と接
触し、接地されるようになつている。 A conventional helical filter will be described below with reference to the drawings. This type of helical filter was constructed as shown in FIG. That is, a conductive nut 3 with a screw 2 provided in a through hole as shown in FIG. 2 is attached to the ceiling surface of the shield case 1 by soldering, crimping, gluing, etc., and the two are brought into electrical contact. The conductive screw 4 is screwed into the threaded part 2 of the nut 3, and a cylindrical bobbin 6 made of plastic around which a helical coil 5 is wound is inserted below the conductive nut 3 in the shield case 1. was. Furthermore, the conductive screw 4 is held only by the conductive nut 3, and is electrically contacted with the shield case 1 and grounded.
前記導電性螺子４とヘリカルコイル５間には容
量が存在し、導電性螺子４を回転移動させること
によつて容量が変化し、それによつて同調周波数
が変わり周波数特性を調整することができるよう
になつている。しかしながら、この構造のヘリカ
ルフイルタは、導電性螺子４が導電性ナツト３に
よつてのみ螺合されているだけであり、両者の間
にはがたがあり、振動や加振などにもより導電性
螺子４ががたついたり、動いたりして、シールド
ケース１への接触が不十分となり、同調周波数が
ずれてしまい、安定性にも欠けてしまうという欠
点があつた。また導電性ナツト３の下部の円筒状
ボビン６の内周面にリブ７を設けて導電性螺子４
の一部が螺合されるようにしても、導電性螺子４
を完全に係止することはできなかつた。これを防
止するため通常は、導電性螺子４と導電性ナツト
３をペイント塗布や半田付けなどにより固定して
いた。しかし、ペイントによる固定では、絶縁性
のものを使用すると導電性螺子４と導電性ナツト
３が絶縁される危険性があり、また導電性のもの
を使用すれば高価であり大幅なコストアツプにな
るいう不経済の面もあつた。また半田付けでは、
ヘリカルコイル５にも半田付けによる高熱が加わ
り特性が大幅に変わるなどの危険性もあつた。し
かもいずれも作業性を著しく悪くするものであつ
た。 A capacitance exists between the conductive screw 4 and the helical coil 5, and by rotating and moving the conductive screw 4, the capacitance changes, thereby changing the tuning frequency so that the frequency characteristics can be adjusted. It's getting old. However, in the helical filter of this structure, the conductive screw 4 is only screwed together by the conductive nut 3, and there is play between the two, and the conductivity may be affected by vibration or excitation. The screw 4 rattles or moves, resulting in insufficient contact with the shield case 1, resulting in a shift in tuning frequency and a lack of stability. Furthermore, ribs 7 are provided on the inner circumferential surface of the cylindrical bobbin 6 at the bottom of the conductive nut 3, so that the conductive screw 4
Even if a part of the conductive screw 4 is screwed together,
could not be completely locked. To prevent this, the conductive screw 4 and the conductive nut 3 are usually fixed by painting or soldering. However, when fixing with paint, if an insulating material is used, there is a risk that the conductive screw 4 and the conductive nut 3 will be insulated, and if a conductive material is used, it will be expensive and the cost will increase significantly. There were also uneconomical aspects. Also, when soldering,
There was also a risk that the helical coil 5 would be exposed to high heat due to soldering, causing its characteristics to change significantly. Moreover, in both cases, workability was significantly deteriorated.
発明の目的
本発明はこのような従来の欠点を徐去するもの
で、導電性螺子のシールドケースへの接触を確実
にして電気的接触性を増すとともに、波形調整後
は導電性螺子を確実に係止し、振動に対してもが
たつかず、作業性も良く、特性も安定なヘリカル
フイルタを提供しようとするものである。OBJECT OF THE INVENTION The present invention aims to eliminate these conventional drawbacks, and improves electrical contact by ensuring the contact of the conductive screw with the shield case. The objective is to provide a helical filter that locks in place, does not wobble against vibrations, has good workability, and has stable characteristics.
発明の構成
この目的を達成するために本発明は、凸部、凹
部を有するシールドケースの天井面の貫通孔の凹
部に挿入された円筒状ボビンの少なくとも２個以
上の突片の内周面にリブを設けるとともに、円筒
状ボビンの左半面と右半面でのリブの大きさを変
え、導電性の螺子の中心と、シールドケースのめ
ねじの中心をずらせて構成したものである。Composition of the Invention In order to achieve this object, the present invention provides a method for forming an inner circumferential surface of at least two projecting pieces of a cylindrical bobbin inserted into a recess of a through hole in a ceiling surface of a shield case having a protrusion and a recess. In addition to providing ribs, the sizes of the ribs on the left and right half surfaces of the cylindrical bobbin are changed, and the center of the conductive screw is offset from the center of the female thread of the shield case.
この構成によつて、導電性螺子は、シールドケ
ース天面の凹部のめねじによつて螺合され、調整
ドライバーによつて回転させることによつて、シ
ールドケースの凸部に挿入された円筒状ボビンの
上端に設けた突片のリブにも導電性螺子のねじ部
が食い込み、ドライバーの回転を止めることによ
つて導電性螺子が円筒状ボビンに係止される。そ
の時円筒状ボビンの左半面と右半面でのリブの大
きさが異なることにより、導電性螺子は、リブの
小さい方へ押されシールドケースの凹部のめねじ
への接触性が部分的に良くなる。したがつて、導
電性螺子は、シールドケースのめねじを通して電
気的にシールドケースに接触して接地されるとと
もに円筒状ボビンのリブによつて振動などに対す
るがたつきや回転が防止されることになる。 With this configuration, the conductive screw is screwed into the female thread in the recess on the top surface of the shield case, and is inserted into the cylindrical shape by rotating it with an adjustment screwdriver. The threaded portion of the conductive screw also bites into the rib of the projecting piece provided at the upper end of the bobbin, and by stopping the rotation of the driver, the conductive screw is locked to the cylindrical bobbin. At this time, due to the difference in the size of the ribs on the left and right half surfaces of the cylindrical bobbin, the conductive screw is pushed toward the smaller rib side, which partially improves contact with the female thread in the recess of the shield case. . Therefore, the conductive screw is grounded by electrically contacting the shield case through the female thread of the shield case, and the ribs of the cylindrical bobbin prevent it from rattling or rotating due to vibrations. Become.
実施例の説明
以下本発明の一実施例を第３図〜第７図の図面
を参照しながら説明する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings of FIGS. 3 to 7.
シールドケース１１の天井面に第４図のシール
ドケース１１の斜視図に示すような円弧状の凸部
１２と凹部１３が各４個からなる貫通孔１４を設
け、凸部１２には周波数調整用の導電性螺子１５
が螺合し、かつドライバーなどで回転すれば、上
下に回転移動するようにめねじ１６が設けられて
いる。 A through hole 14 consisting of four arc-shaped convex portions 12 and four concave portions 13 is provided in the ceiling surface of the shield case 11 as shown in the perspective view of the shield case 11 in FIG. conductive screw 15
A female thread 16 is provided so that it rotates up and down when the two are screwed together and rotated with a screwdriver or the like.
また、一端を接地、他端を開放してなるヘリカ
ルコイル１７を巻回したプラスチツクからなる円
筒状ボビン１８の上部に、第５図に示ような内周
面にリブ１９，２０を有する円弧状の突片２１を
設け、これを前記シールドケース１１の円弧状の
凹部１３に挿入し、更に前記シールドケース１１
の天井面の貫通孔１４内には周波数調整用の導電
性螺子１５が螺合されている。 Further, on the upper part of a cylindrical bobbin 18 made of plastic wound with a helical coil 17 having one end grounded and the other end open, an arc-shaped bobbin 18 having ribs 19 and 20 on the inner circumferential surface as shown in FIG. A projecting piece 21 is provided, which is inserted into the arc-shaped recess 13 of the shield case 11, and then the shield case 11
A conductive screw 15 for frequency adjustment is screwed into the through hole 14 in the ceiling surface.
尚、前記円筒状ボビン１８の上部に設けた突片
２１のリブ１９，２０は、第６図のボビン上面図
に示すように左半面のリブ１９の形状を右半面の
リブ２０の形状より高さ、幅ともに大きくしてい
る。 The ribs 19 and 20 of the projecting piece 21 provided on the upper part of the cylindrical bobbin 18 are arranged such that the shape of the rib 19 on the left half surface is higher than the shape of the rib 20 on the right half surface, as shown in the top view of the bobbin in FIG. Well, both the width and width are increased.
前記導電性螺子１５をドライバーで回転させる
とシールドケース１１の貫通孔１４の凸部１２の
めねじ１６と螺合し、回転して上下移動すると同
時に、シールドケース１１の凹部１３に挿入した
円筒状ボビン１８の突片２１のリブ１９，２０に
も導電性螺子１５のねじ部が食い込み、自動的に
ねじが切られていくことになる。ここで、ドライ
バーの回転を停止すれば、導電性螺子１５のねじ
部が円筒状ボビン１８の突片２１のリブ１９，２
０に食い込み、係止することとなる。また、導電
性螺子１５はシールドケース１１の凹部１３のめ
ねじ１６を通してシールドケース１１と電気的に
接触し接地されるが、導電性螺子１５の嵌合状態
は第７図に示すように、シールドケース１１の４
個の凸部１２で決まる中心点c1と導電性螺子１５
がリブ１９，２０と嵌合して決まる導電性螺子１
５の中心点c2は同一点とならずｄだけ差が生ず
る。すなわち、形状の大きいリブ１９により導電
性螺子１５が形状の小さいリブ２０側へ押され、
その中心点c2が右側に寄ることになる。これによ
つて導電性螺子１５のシールドケース１１の凸部
１２のめねじ１６′との接触性が更に良くなり、
電気的安定性も高いことになる。また、リブ１
９，２０によつて、回転やがたつきが阻止されて
固定される。 When the conductive screw 15 is rotated with a screwdriver, it engages with the female thread 16 of the protrusion 12 of the through hole 14 of the shield case 11, and at the same time rotates and moves up and down, the cylindrical screw 15 inserted into the recess 13 of the shield case 11 is rotated. The threaded portion of the conductive screw 15 also bites into the ribs 19, 20 of the projecting piece 21 of the bobbin 18, and the thread is automatically cut. Here, if the rotation of the driver is stopped, the threaded portion of the conductive screw 15 will be connected to the ribs 19 and 2 of the protruding piece 21 of the cylindrical bobbin 18.
It will bite into 0 and become locked. Further, the conductive screw 15 is electrically contacted with the shield case 11 through the female thread 16 of the recess 13 of the shield case 11 and grounded, but the fitted state of the conductive screw 15 is as shown in FIG. Case 11-4
The center point c 1 determined by the convex portions 12 and the conductive screw 15
The conductive screw 1 is determined by fitting with the ribs 19 and 20.
The center points c2 of 5 are not the same point, but differ by d. That is, the conductive screw 15 is pushed toward the small rib 20 by the large rib 19,
The center point c2 will be on the right side. This further improves the contact between the conductive screw 15 and the female thread 16' of the protrusion 12 of the shield case 11.
Electrical stability is also high. Also, rib 1
9 and 20 prevent rotation and wobbling and are fixed.
ヘリカルコイル１７と導電性螺子１５間には容
量が存在し、導電性螺子１５を回転移動させるこ
とにより、前記容量を変えることができ、同調周
波数を変えて周波数調整を行うことができる。 A capacitance exists between the helical coil 17 and the conductive screw 15, and by rotating and moving the conductive screw 15, the capacitance can be changed, and the tuning frequency can be changed to perform frequency adjustment.
このように、導電性螺子１５はシールドケース
１１と電気的に接触することができるとともに、
円筒状ボビン１８に設けた突片２１のリブ１９，
２０によつて固定されているため、ドライバーな
どで導電性螺子１５を回転させない限り、振動な
どにより自然に回転することはない。したがつ
て、導電性螺子１５のがた防止のためのペイント
塗布や半田付け作業も不要で、しかも導電性螺子
１５がシールドケース１１を通して接地されてい
るため、調整用ドライバーの影響もなく容易に周
波数調整ができ、がたつきもないため特性的にも
安定したヘリカルフイルタを提供できることにな
る。なお、上記実施例ではシールドケース１１の
天井面に円弧状の凸部１２、凹部１３とボビン１
８の突片２１を各４個ずつとしたが、２個、３個
あるいは５個以上としても実現可能である。ま
た、従来の導電性ナツト３の内側形状を本発明の
ような形状にしても同等の効果を得ることができ
る。 In this way, the conductive screw 15 can make electrical contact with the shield case 11, and
Rib 19 of protruding piece 21 provided on cylindrical bobbin 18,
20, it will not rotate naturally due to vibrations or the like unless the conductive screw 15 is rotated with a screwdriver or the like. Therefore, there is no need to apply paint or solder work to prevent rattling of the conductive screw 15, and since the conductive screw 15 is grounded through the shield case 11, it can be easily adjusted without being affected by the adjustment screwdriver. Since the frequency can be adjusted and there is no rattling, it is possible to provide a helical filter with stable characteristics. In the above embodiment, the ceiling surface of the shield case 11 has an arc-shaped convex portion 12, a concave portion 13, and a bobbin 1.
Although the number of protrusions 21 of 8 is four each, it is also possible to use two, three, or five or more protrusions. Further, even if the inner shape of the conventional conductive nut 3 is changed to the shape of the present invention, the same effect can be obtained.
発明の効果
以上のように本発明のヘリカルフイルタによれ
ば、周波数調整用導電性螺子をシールドケースと
確実に電気的にしかも、安定に接触させ、導電性
螺子をドライバーなどで回転させない限り、振動
などでは、自然に回転したりがたつきの発生しな
い構造となつており、信頼性の向上が図れるとと
もに、ペイント塗布や半田付けによる固定なども
不要で作業性も良くコスト的にも有利であるなど
の効果が得られる。Effects of the Invention As described above, according to the helical filter of the present invention, the conductive screw for frequency adjustment is brought into reliable electrical and stable contact with the shield case, and unless the conductive screw is rotated with a screwdriver or the like, vibrations will occur. For example, it has a structure that rotates naturally and does not cause rattling, improving reliability, and does not require fixing with paint or soldering, making it easy to work and cost-effective. The effect of this can be obtained.
さらに、シールドケース天面に挿入された円筒
状ボビンの左半面もしくは右半面のうちの一方だ
けにリブを設ければ、導電性螺子のシールドケー
スの凸部のめねじとの接触性を高めることがで
き、電気的安定性を良くすることができる。 Furthermore, if a rib is provided on only one of the left half surface and right half surface of the cylindrical bobbin inserted into the top surface of the shield case, it is possible to improve the contact between the conductive screw and the female thread of the convex portion of the shield case. can improve electrical stability.
また、導電性螺子が、円筒状ボビンと、シール
ドケースの凸部のめねじの両方に嵌合するので、
シールドケースをめてボビンを固定しなくても
良く、工数低減を図れるなどのメリツトもある。 Also, since the conductive screw fits into both the cylindrical bobbin and the female thread on the convex part of the shield case,
There is no need to close the shield case and fix the bobbin, which has the advantage of reducing man-hours.
第１図は従来のヘリカルフイルターの断面図、
第２図は同ヘリカルフイルタに用いる導電性ナツ
トの斜視図、第３図は本発明のヘリカルフイルタ
の一実施例を示す断面図、第４図は本発明におけ
るシールドケースの天井面の斜視図、第５図は本
発明における円筒状ボビンの上部の斜視図、第６
図は本発明における円筒状ボビンの上面図、第７
図は本発明における導電性螺子の嵌合状態を示す
上面図である。
１１……シールドケース、１２……凸部、１３
……凹部、１４……貫通孔、１５……導電性螺
子、１６……めねじ、１７……ヘリカルコイル、
１８……円筒状ボビン、１９，２０……リブ、２
１……突片。
Figure 1 is a cross-sectional view of a conventional helical filter.
FIG. 2 is a perspective view of a conductive nut used in the helical filter, FIG. 3 is a sectional view showing an embodiment of the helical filter of the present invention, and FIG. 4 is a perspective view of the ceiling surface of the shield case in the present invention. FIG. 5 is a perspective view of the upper part of the cylindrical bobbin according to the present invention, and FIG.
The figure is a top view of the cylindrical bobbin according to the present invention.
The figure is a top view showing the fitted state of the conductive screw in the present invention. 11... Shield case, 12... Convex portion, 13
... recess, 14 ... through hole, 15 ... conductive screw, 16 ... female thread, 17 ... helical coil,
18... Cylindrical bobbin, 19, 20... Rib, 2
1...Protrusion.
Claims (1)
部、凹部からなる貫通孔を設け、この凸部に導電
性螺子が回転自在に螺合するめねじを設け、凹部
にヘリカルコイルを巻回した円筒状ボビンの上端
の円弧状の突片を挿入して構成され、前記シール
ドケースの天井面の貫通孔に挿入された円筒状ボ
ビンの少なくとも２個所以上の突片の内周面にリ
ブを設けるとともに、円筒状ボビンの左半面と右
半面でのリブの大きさを変え、導電性螺子の中心
と、シールドケースのめねじの中心をずらせてな
るヘリカルフイルタ。1. A through hole consisting of a plurality of arc-shaped convex parts and concave parts is provided on the ceiling surface of the shield case, a female screw is provided in the convex part to which a conductive screw is rotatably engaged, and a cylindrical coil is wound around the concave part. The cylindrical bobbin is constructed by inserting an arcuate protrusion at the upper end of the cylindrical bobbin, and ribs are provided on the inner circumferential surface of at least two protrusions of the cylindrical bobbin inserted into the through hole in the ceiling surface of the shield case. , a helical filter made by changing the size of the ribs on the left and right half surfaces of a cylindrical bobbin, and shifting the center of the conductive screw from the center of the female thread of the shield case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23663883A JPS60127802A (en) | 1983-12-15 | 1983-12-15 | Helical filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23663883A JPS60127802A (en) | 1983-12-15 | 1983-12-15 | Helical filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60127802A JPS60127802A (en) | 1985-07-08 |
| JPH0135522B2 true JPH0135522B2 (en) | 1989-07-26 |
Family
ID=17003587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23663883A Granted JPS60127802A (en) | 1983-12-15 | 1983-12-15 | Helical filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60127802A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0511536U (en) * | 1991-07-23 | 1993-02-12 | 株式会社大真空 | Surface mount electronic components |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643302U (en) * | 1987-06-24 | 1989-01-10 | ||
| FI92265C (en) * | 1992-11-23 | 1994-10-10 | Lk Products Oy | Radio frequency filter, whose helix resonators on the inside are supported by an insulation plate |
| JP2007290094A (en) * | 2006-04-27 | 2007-11-08 | Mitsubishi Heavy Ind Ltd | Tailstock center and tailstock |
-
1983
- 1983-12-15 JP JP23663883A patent/JPS60127802A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0511536U (en) * | 1991-07-23 | 1993-02-12 | 株式会社大真空 | Surface mount electronic components |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60127802A (en) | 1985-07-08 |
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