414902 Μ Β7 經濟部智慧財產局員工消費合作社印製 五、發明説明（1 ) 【解決方式】 在端蓋4之內側底面，以例如金、錫或銀等之電鍍+， 實施爲帶來接觸電阻小且安定之表面的表面處理2i。進一 步’最好在與端蓋4 —體形成之轉子端子18上，實施提昇 焊接性之表面處理22。 【發明所屬之技術領域】 此發明係有關可變電容，特別是，使定子電極與轉子 電極之有效對向面積’藉相對於定子電極的轉子電極之旋 轉而變化，藉以改變靜電容量之物。 [習知技術】 和本發明有關之可變電容，例如日本專利公報特開平 第6-120079號所記載之物。圖.1及圖2係顯示記載於此公 報之可變電容1。又’圖1中⑴係可變電容1之俯視圖、 (2)係其前視圖' (3)係其右側視圖、（4)係其仰視圖，圖2係 圖1(1)之沿線A—A之截面圖。 參照圖1及圖2，可變電容1大致來說，具有定子2、.， 轉子3岌端蓋4。定子2之主要部係由陶瓷電介質構成_/ 轉子3係由如黃銅之金屬構成。端蓋4係由如不銹鋼般之 具彈性之金屬構成。 以下，針對上述各要件之詳細的構造加以說明。 定子2就整體來說具對稱之構造。其內部並列形成有 定子電極5及6。定子2之各端部外表面上，藉導電膜形 成與此等定子電極5及6電氣連接之定子端子7及8。 又’ 2個定子電極5及6與2個轉子電極7及8之所 ί#先閱讀背面之注意事項再 •裝· ，1Τ -線. 本紙張尺度適用中國國家標準（CNS ) Λ4規格（210X297公釐） 414902 at ______ B7 五、發明説明（l) 以形成，係爲使定子2的構造對稱，在使用此定子2的可 變電容1組裝時，去除考慮定子2的方向的需要。因此， 如不期待此種優點·，則可省略定子電極5及6之任一方或 與此關連之轉子電極7或8之任一方。 定子2之下面，形成有自其對向之兩側緣分別向內延 伸之凹部9及1〇。 轉子3係配置於上述定子2之上面上方，其下面，藉 突出之梯部形成有大致成半圓狀之轉子電極11。又，轉子 3之下面，彤成有與轉子電極11等高之凸部12，藉轉子電 極U之存在可防止轉子3之傾斜。 轉子3上，形成有起子槽13以接受使其旋轉操作用之 起子等工具。 端蓋4，係收容轉子3且固定於定子2之物，藉此端 蓋4，轉子3相對於定子2以可旋轉之方式保持住。端蓋4 上，形成有使轉子3之起子槽13露出之調整用孔14，藉 此，容許爲使轉子3旋轉操作之起子等之工具插入。. 調_用孔14的周圍，設有與轉子3接觸，將轉子3'壓 接向定子2的彈簧作用部15。此彈簧作用部15，在調整用 孔14周圍，被賦予越向中心越往下傾斜之形狀，而此係藉 調整用孔14周圍之金屬材料本身達成。 端蓋4上’以相對向且和端蓋結合爲一體之方式設有 向下方延伸之卡合片16及17。卡合片16及Π，爲分別與 形成於定子2的下面凹部9及1〇卡合，係之後再作彎折加 之物。 (諳先閲讀背面之注意事項再 頁) 裝- 訂 •線 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公疫） 經濟部智慧財產局員工消費合作社印製 414902 g 五、發明説明（1 ) 又，端蓋4上，以自設置卡合片16及17之不同位置 沿定子2向下延伸且和其結合爲一體之方式，設有轉子端 子 18 〇 ' 進一步v在相當於彈簧作用部下面側之端蓋4之內側 底面19與轉子3之間，配置有導電性之彈簧墊片20。彈 簧墊片20，以向其厚度方向之變形發揮其彈性。 使用上述之定子2、轉子3、端蓋4及彈簧墊片20之 可變電容1以下述之方式組合。 在定子2上配置轉子3，在轉子3上配置彈簧墊片20 ，以覆蓋轉子3及彈簧墊片20之方式配置端蓋4。接著’ 以使轉子3壓接於定子的方式將端蓋4壓向定子2 ’同時 將設於端蓋4上之卡合片16及17之端部分別向內折。藉 此，卡合片16及17分別與形成於定子2下方之凹部9及 10卡合。 此時，設於端蓋4上之轉子端子18，被置於設於定子 2上之定子端子8(圖示狀態下並未具備定子端子之機能)之. 對向位滅。因此，此等轉子端子18及定子端子8之間以_焊_ 接等方式(未圖示)強化端蓋4對定子2之固定狀態，使定 子端子8具備轉子端子之機能亦可。 如此，完成可變電容i之組裝。 此組裝狀態中，如圖2之詳示，轉子電極11相對於定 子電極5，經由構成定子2之陶瓷電介質之一部份成對向 ，以形成靜電容量。爲使轉子電極11相對定子電極5之有 效對向面積產生變化以變化靜電容量，操作轉子3使其轉 ί讀先閱讀背面之注意事項再 -裝 頁) 訂 線 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐） 414902 Α7 Β7 五、發明説明（γ) 動。此靜電容量係取自於電氣連接於定子電極5之定子端 子7及轉子端子丨8間。其中，轉子端子18係設置於透過 彈簧墊片20對形成轉子電極11之轉子3電氣連接之端蓋 4上。 【發明欲解決之問題】 然而，上述可變電容1卻有如下待解決之問題。 如前所述，爲取出靜電容量，自形成轉子端子18之端 蓋4至形成轉子霉極11之轉子3止之電氣連接路徑之〜部 份中，端蓋4之內側底面19有與彈簧墊片20接觸之部份 。又，如前所述，端蓋4因被要求具彈性，典型上是以> 銹鋼構成。 此種狀況中，不銹鋼會帶來接觸電阻大的表面， 其不安定，在端蓋4之內側底面19與彈簧墊片20間之觀 氣導通會缺乏可靠性。 經濟部智慧財產局員工消費合作社印製 ----I---；--襄-- I (“請先閱讀背面之ίΐ意事項再^頁」 •訂- 又，因不銹鋼是會造成焊接性差的表面的金屬，離_ 4上結合爲一體之轉子端子18的焊接性亦極差。所以i > & 可變電έ 1組裝於配線基板(未圖示)時所使用之焊錫。 易付著於轉子端子18上，而遭遇組裝著時可靠性不佳旳间 題。 因此，本發明之目的即在提供一可解決上述問題之听 變電容。 [解決問題的方法】 此發明相關之可變電容，包含有： 定子，其上形成有定子電極及與定子電極電氣連璲之 本紙乐尺度適用中國國家標準（CNS ) Α4规格（210Χ297公漦） 414902 A7 B7 五、發明説明（七） 定子端子； 轉子，其上有相對於定子電極介由電介質對向形成之 轉子電極； / 端蓋，具導電性，係電氣連接於轉子電極，爲使轉子 電極對定子電極之有效對向面積變化，轉子相對於定子具 有以可轉動的方式收容之形狀，且固定於定子； 此端蓋，由帶來接觸電阻較大之表面之金屬而成，又 -一-端蓋之至轉子電極之電氣連接路徑，包含端蓋內側底面 與轉子電極電器連接之導體接觸的部份。 本發明中，此種可變電容，爲解決上述技術性的問題 ，至少在端蓋內側底面，施有爲帶來接觸電阻較小且安定 之表面之表面處理。 此發明中，構成端蓋之金屬，如爲不銹鋼時，此金屬 如上所述，不僅帶來接觸電阻較大之表面，亦有焊接性差 的表面。據此，.如構成端蓋之金屬係具有焊接性差的表面 之金屬，在端蓋一體形成轉子端子時，至少在轉子端子上 實施提昇焊接性之表面處理較好。 ％ ~ 又，在上述情形下，轉子端子沿定子延伸時，提昇焊 接性之表面處理，最好只實施在轉子端子向著外側的面上 0 如上述之爲帶來接觸電阻較小且安定之表面之表面處 理及提昇焊接性之表面處理，較好之實施彤態，係互爲相 同之表面處理，舉例來說，金、錫或銀電鍍即適用於作爲 此種表面處理。 (#-先閱讀背面之注意事項再表 .裝. 訂 線 經濟部智慧財產局員工消費合作社印製 本紙張尺废適用中國國家標準（CNS ) Λ4規格（210Χ297公釐） 414902 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明（(） 此發明相關之可變電容中，最好是在端蓋上形成容許 操作轉子轉動之工具插入之調整用孔，同時在調整用孔之 周圍設置使轉子壓接向定子之彈簧作用部。 又，此發明之較佳之實際形態中，轉子係由導電性之 金屬構成，前述電氣連接路徑之一部份，藉轉子自身構成 。此情形，在某些實施形態中，與端蓋之內側底面接觸之 前述導體爲轉子。 · 此發明其他較佳之實施形態中，端蓋之內側底面與轉 子之間，配置有彈簧墊片。此情形中，與端蓋之內側底面 接觸之前述導體爲此彈簧墊片。 又，此發明中，端蓋最好是由電介質構成，其內部形^ 成有定子電極，且具有以其外部表面上之導電膜形成定子 端子之構造。 【發明之實施彫態】 前述圖1及圖2,係用來說明本發明之一實施形態。 因此，參照圖1及圖2說明之可變電容1，其基本構成與 · 此發明之實施形態相同，所以，與此實施形態相關之可_變 電容1之基本構成之說明，援用前述之說明而省略。 圖3，顯示可變電容1具備之端蓋4之主要部位沿圖1 之A-A線之截面圖。端蓋4，如前所述，係以具彈性之導 電性的金屬，例如不銹鋼構成。此不銹鋼，眾所周知的， 係一種不僅帶來接觸電阻較大且不安定之表面，亦帶來焊 援性差的表面之金屬。 此實施形態中，如圖3中以粗線圖解所示，端蓋4之 _s_ 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 〔讀先間讀背面之注意事項再 -裝-414902 Β7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (1) [Solution] The inner bottom surface of the end cap 4 is plated with gold, tin, or silver, for example, to bring in contact resistance Surface treatment 2i for small and stable surfaces. Further, it is preferable to perform a surface treatment 22 for improving the solderability on the rotor terminal 18 formed integrally with the end cover 4. [Technical field to which the invention belongs] This invention relates to a variable capacitor, and in particular, the effective opposing area of the stator electrode and the rotor electrode 'is changed by the rotation of the rotor electrode relative to the stator electrode, thereby changing the electrostatic capacity. [Conventional Technology] The variable capacitor related to the present invention is, for example, what is described in Japanese Patent Laid-Open No. 6-120079. Fig. 1 and Fig. 2 show the variable capacitor 1 described in this bulletin. Also, 'The top view of the variable capacitor 1 in FIG. 1 is (2) a front view thereof' (3) is a right side view, (4) is a bottom view thereof, and FIG. 2 is along line A of FIG. 1 (1) — A sectional view. 1 and 2, the variable capacitor 1 generally includes a stator 2, a rotor 3, and an end cover 4. The main part of the stator 2 is made of ceramic dielectric. The rotor 3 is made of metal such as brass. The end cap 4 is made of a flexible metal such as stainless steel. The detailed structure of each of the above-mentioned requirements will be described below. The stator 2 has a symmetrical structure as a whole. Inside the stator electrodes 5 and 6 are formed in parallel. On the outer surface of each end of the stator 2, stator terminals 7 and 8 electrically connected to these stator electrodes 5 and 6 are formed by a conductive film. There are 2 stator electrodes 5 and 6 and 2 rotor electrodes 7 and 8. The first read the precautions on the back, and then install, 1T-wire. This paper size applies the Chinese National Standard (CNS) Λ4 specifications (210X297 (Mm) 414902 at ______ B7 V. Description of the invention (l) The formation is to make the structure of the stator 2 symmetrical. When the variable capacitor 1 using this stator 2 is assembled, the need to consider the direction of the stator 2 is removed. Therefore, if such advantages are not expected, either one of the stator electrodes 5 and 6 or the rotor electrode 7 or 8 associated with it may be omitted. The lower surface of the stator 2 is formed with concave portions 9 and 10 extending inwardly from opposite side edges. The rotor 3 is arranged above and above the stator 2, and a rotor electrode 11 having a substantially semicircular shape is formed on the lower portion of the stator 2 by a protruding step portion. A convex portion 12 having a height equal to that of the rotor electrode 11 is formed below the rotor 3. The presence of the rotor electrode U prevents the rotor 3 from tilting. In the rotor 3, a screwdriver groove 13 is formed to receive a tool such as a screwdriver for rotating the screwdriver. The end cover 4 is an object that accommodates the rotor 3 and is fixed to the stator 2, whereby the end cover 4 holds the rotor 3 in a rotatable manner with respect to the stator 2. The end cover 4 is formed with an adjustment hole 14 for exposing a screwdriver groove 13 of the rotor 3, thereby allowing a tool such as a screwdriver for rotating the rotor 3 to be inserted. A spring action portion 15 is provided around the adjusting hole 14 to contact the rotor 3 and press-contact the rotor 3 'to the stator 2. This spring action portion 15 is provided with a shape that slopes downward toward the center around the adjustment hole 14, and this is achieved by the metal material around the adjustment hole 14 itself. The end cover 4 is provided with engaging pieces 16 and 17 extending downward so as to be opposed to and integrated with the end cover. The engaging pieces 16 and Π are engaged with the concave portions 9 and 10 formed on the lower surface of the stator 2, respectively, and are added after being bent. (谙 Please read the precautions on the back first) Binding-Order • Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs Employees' Cooperatives This paper is printed in accordance with the Chinese National Standard (CNS) A4 specification (210 X 297 public epidemic) Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the employee consumer cooperative 414902 g V. Description of the invention (1) In addition, the end cap 4 is extended along the stator 2 from different positions where the engaging pieces 16 and 17 are provided, and is integrated with the integral manner. The rotor terminal 18 ′ ′ is further provided with a conductive spring washer 20 between the inner bottom surface 19 of the end cover 4 corresponding to the lower surface side of the spring action portion and the rotor 3. The spring washer 20 exhibits its elasticity by being deformed in the thickness direction. The variable capacitor 1 using the above-mentioned stator 2, rotor 3, end cover 4 and spring washer 20 is combined in the following manner. A rotor 3 is disposed on the stator 2, a spring washer 20 is disposed on the rotor 3, and an end cover 4 is disposed so as to cover the rotor 3 and the spring washer 20. Then, 'the end cover 4 is pressed toward the stator 2 so that the rotor 3 is crimped to the stator, and at the same time, the ends of the engaging pieces 16 and 17 provided on the end cover 4 are respectively folded inward. Thereby, the engaging pieces 16 and 17 are engaged with the concave portions 9 and 10 formed under the stator 2, respectively. At this time, the rotor terminal 18 provided on the end cover 4 is placed on the stator terminal 8 provided on the stator 2 (the function of the stator terminal is not provided in the state shown in the figure). Therefore, the fixed state of the end cover 4 to the stator 2 is strengthened by means of welding (not shown) between the rotor terminal 18 and the stator terminal 8 so that the stator terminal 8 may have the function of a rotor terminal. In this way, the assembly of the variable capacitor i is completed. In this assembled state, as shown in detail in FIG. 2, the rotor electrode 11 is opposed to the stator electrode 5 through a portion of the ceramic dielectric constituting the stator 2 to form an electrostatic capacity. In order to change the effective opposing area of the rotor electrode 11 with respect to the stator electrode 5 to change the electrostatic capacity, operate the rotor 3 to read it, read the precautions on the back, and then install the page.) Binding This paper size applies Chinese national standards ( CNS) A4 specification (210 X 297 mm) 414902 A7 B7 V. Description of the invention (γ) Movement. This electrostatic capacity is taken between the stator terminal 7 and the rotor terminal 丨 8 which are electrically connected to the stator electrode 5. Among them, the rotor terminal 18 is provided on the end cover 4 which is electrically connected to the rotor 3 forming the rotor electrode 11 through the spring washer 20. [Problems to be Solved by the Invention] However, the above-mentioned variable capacitor 1 has the following problems to be solved. As mentioned above, in order to take out the electrostatic capacity, among the parts of the electrical connection path from the end cover 4 forming the rotor terminal 18 to the rotor 3 forming the mold pole 11 of the rotor, the inner bottom surface 19 of the end cover 4 has a spring pad. The contact portion of the sheet 20. As described above, since the end cap 4 is required to have elasticity, it is typically made of > rust steel. In such a situation, stainless steel brings a surface with a large contact resistance, which is unstable, and the air conduction between the inner bottom surface 19 of the end cap 4 and the spring washer 20 may lack reliability. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs ---- I ---;-Xiang--I ("Please read the" Issuing Matters on the Back "and ^ Pages" • Order-Also, because stainless steel will cause welding The metal with a poor surface is also extremely poor in solderability from the rotor terminal 18 which is integrated into the _4. Therefore, i > & Variable Electric 1 is a solder used when assembled on a wiring board (not shown). It is easy to attach to the rotor terminal 18, and encounters a problem of poor reliability when assembled. Therefore, the object of the present invention is to provide an audio-capacitor that can solve the above problems. [Method for solving the problem] This invention is related to The variable capacitor includes: a stator on which a stator electrode is formed and electrically connected to the stator electrode. The paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210 × 297 cm) 414902 A7 B7 V. Description of the invention (Seven ) Stator terminals; rotor, with rotor electrodes formed opposite to the stator electrodes via dielectric; / end caps, which are electrically conductive, are electrically connected to the rotor electrodes, in order to make the rotor electrodes effectively face the stator electrodes Variety, The stator has a shape rotatably received with respect to the stator, and is fixed to the stator. This end cap is made of metal that brings a surface with a larger contact resistance, and the electrical connection of the end cap to the rotor electrode The path includes the portion where the bottom surface of the inner side of the end cover is in contact with the conductor connected to the rotor electrode electrical appliances. In the present invention, in order to solve the above-mentioned technical problem, at least the bottom surface of the inner side of the end cover is provided with contact Surface treatment of a surface with low resistance and stability. In the present invention, when the metal constituting the end cap is stainless steel, as mentioned above, this metal not only brings a surface with higher contact resistance, but also a surface with poor weldability. According to Therefore, if the metal constituting the end cover is a metal with a poorly weldable surface, when the end cover is integrally formed with the rotor terminal, it is better to perform a surface treatment to improve the weldability at least on the rotor terminal.% ~ Also, in the above case When the rotor terminal extends along the stator, the surface treatment to improve the weldability is best implemented only on the outer side of the rotor terminal. As mentioned above, it brings contact resistance. And the surface treatment of stable surface and the surface treatment to improve the weldability, the better implementation of the Tong state, are the same surface treatment, for example, gold, tin or silver plating is suitable for such surface treatment. # -Read the precautions on the back and then the table. Packing. Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. This paper rule applies to the Chinese National Standard (CNS) Λ4 specification (210 × 297 mm) 414902 A7 B7 Intellectual Property Printed by the Bureau ’s Consumer Cooperatives. 5. Description of the invention (() Among the variable capacitors related to this invention, it is best to form an adjustment hole on the end cover that allows the tool to operate the rotor to insert, and set it around the adjustment hole. The rotor is crimped to the spring action portion of the stator. Moreover, in a preferred practical form of the invention, the rotor is made of a conductive metal, and a part of the aforementioned electrical connection path is formed by the rotor itself. In this case, in some embodiments, the aforementioned conductor in contact with the inner bottom surface of the end cap is a rotor. · In other preferred embodiments of the present invention, a spring washer is arranged between the inner bottom surface of the end cap and the rotor. In this case, the aforementioned conductor in contact with the inner bottom surface of the end cap is a spring washer. Further, in this invention, the end cap is preferably made of a dielectric, a stator electrode is formed inside, and a structure in which a stator terminal is formed by a conductive film on an outer surface thereof. [Embodiment of the Invention] The foregoing FIG. 1 and FIG. 2 are used to describe one embodiment of the present invention. Therefore, the basic structure of the variable capacitor 1 described with reference to FIG. 1 and FIG. 2 is the same as that of the embodiment of the present invention. Therefore, for the description of the basic structure of the variable capacitor 1 related to this embodiment, refer to the foregoing description. And omitted. FIG. 3 is a cross-sectional view of a main part of the end cap 4 included in the variable capacitor 1 along line A-A in FIG. 1. As described above, the end cap 4 is made of an elastic conductive metal such as stainless steel. This stainless steel, as is well known, is a metal that not only brings a surface with large contact resistance and instability, but also a surface with poor solderability. In this embodiment, as shown by the thick line in Figure 3, the _s_ of the end cap 4 is the same as the Chinese National Standard (CNS) A4 specification (210X297 mm). [Read the precautions on the back before reading- Loading-
11T 線 414902 at _B7 五、發明説明（7) 內側底面19實施有表面處理21以帶來接觸電阻較小且安 定之表面，而轉子端子18上，實施有爲提昇焊接性之表面 處理22。施於轉子端子18上之表面處理22，自與想像線 表示之定子2之關係位置看時，只要能達到定子2之上面 即足夠。 上述之表面處理21及22，在此實施形態中互爲相同 之表面處理，舉例來說，施有金、錫或銀之電鍍。此種金 、錫或銀之電鍍.，除帶來接觸電阻小且安定之表面外、亦 提昇焊接性。 因此，依據此實施形態，藉施於端蓋4之內側底面19 之表面處理21，可確保與彈簧墊片20間之較佳之耐環境 性，且接觸電阻小、安定之電氣接觸。又，如圖4所示， 此可變電容1組裝於配線基板23上時，爲組裝之焊錫24( 塗黒表示)被良好的付與在轉子端子18上，提昇組裝的可 信度。 圖5相當於圖3，係顯示施於端蓋4上之表面處理之./ 他種形式。 " 參照圖5，表面處理25，不僅是施於端蓋4之內側底 面及轉子端子上，而幾乎是施於全面。此表面處理25，與 前述表面處理21及22相同，除帶來接觸電阻小且安定之 表面外、亦爲提昇焊接性之，如金、錫或銀之電鍍。 •即使以圖5所示之形式來實施表面處理25，亦如實施 前述圖3之表面處理21及22般，得到實質上同樣的效果 〇 本紙張尺度適用中國國家樣準（CNS ) A4規格（210 X 297公釐） (#先®^背面之注意事項再頁 -裝· 訂 線 經濟部智慧財產局員工消費合作社印製 A7 B7 41490^ 五、發明説明（g ) (諳先閱讀背面之注意事項 如上述圖3及圖5所示之表面處理之各形式中，如注 意轉子端子18的部份，圖3中之表面處理22及圖5中之 表面處理25，皆施於轉子端子18的兩面。因此，甚至會 發生組裝用之焊錫24及熔接劑(未圖示)滲入未預期部份之 不良狀況。 譬如說，乳狀焊錫之塗布量過多時，焊錫24滲入端蓋 24內部，造成轉子3被此焊錫24固定，或熔接劑滲入端 蓋4與彈簧墊片21、彈簧墊片20與轉子3、轉子電極11 與定子2等接觸的部份、而造成電氣接觸之損害。 爲確實迴避此種問題，最好是採用以下圖7及圖8所 示之表面處理的形式。 圖7及圖8係分別相當於圖3之圖，顯示施於端蓋4 上之表面處理之他種形式。 經濟部智慧財產局員工消費合作杜印製 圖7，係與圖3所示端蓋4之內側底面19.上之表面處 理21相同形式，在端蓋4之內側底面上施有爲帶來接觸電 阻小且安定之表面的表面處理26外、而在轉子端子18上 ，僅在真向外側之面，施以提昇焊接性之表面處理27。'达匕: 實施形態中，表面處理26及27，亦可採用如金、錫或銀 之電鍍等，互爲相同之表面處理。 在圖8中，除轉子端子18之向內側之面外，端蓋4之 幾乎全面上皆施有表面處理28。此表面處理28，除帶來接 觸電阻小且安定之表面外、亦爲提昇焊接性之，與前述各 種表面處理相同之金、錫或銀之電鍍。 據此，如圖7及圖8所示之表面處理之形式，因朝向 —---------Ιΰ_________ 本紙張尺度適用中國國家標準{ CNS ) Λ4规格（210 X297公釐） 414902 λ7 _ _Β7 __ 五、發明説明（f) 轉子端子18內側之面上未實施表面處理27或28，像端蓋 4之材料之不銹鋼般帶來焊接性較差的表面之金屬以其原 狀露出。因此，如圖6所示'，可確實防止組裝用之焊錫24 滲入端蓋4的內部，或熔接劑滲入端蓋4內各要件之接觸 部份的不良狀況，而可確實達成如圖4所示24等之正確的 付與狀態。 以上，說明了與圖示之本發明相關連之實施形態，在 本發明之範圍內，可有其他種種的變形例。 譬如說，圖示之實施形態中，係使用不銹鋼作爲構成 端蓋4之帶來接觸電阻較大之表面之金屬，但亦可使用其 他的金屬。 又，圖示之實施形態中，構成端蓋4之金屬，如不銹 鋼般，係一種不僅帶來接觸電阻較大之表面，亦帶來焊接 性不良之表面之金屬，但此發明中之端蓋4，雖帶來接觸 電阻較大之表面，但亦可由帶來焊接性良好之表面之金屬 構成。 又：圖示之實施形態中，如上所述，構成端蓋4之_金 屬，係既帶來接觸電阻較大之表面又帶來焊接性不良的表 面之物，因此，至少’作爲施於端蓋4之內側底面19及轉 子端子18上之表面處理，採用了具有帶來接觸電阻較小且 安定之表面之機能及提昇焊接性之機能之表面處理，但爲 帶來接觸電阻較小且安定之表面之表面處理與爲提昇焊接 性之表面處理，係不同種類之表面處理，如將前者之表面 處理施於端蓋4之內側底面19，後者之表面處理施於轉子 ______U______ 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 414902 A7 ____ _B7_________ 五、發明説明（[Ό ) 端子18上亦可。 又，作爲具有上述共通機能之表面處理，係採用金、 錫或銀之電鑛，但亦可採用其他金屬之電鑛’或其他的表 面處理方法〜 又，關於適用本發明之可變電容之構造，在圖示之實 施形態中，於端蓋4之內側底面19與轉子3之間，配置有 彈簧墊片20，但省略此種彈簧墊片，採端蓋4之內側底面 19直接接觸於轉子3之構造亦可。 又，在圖示之實施形中，係藉由導電性之金屬構成轉 子3，而端蓋4對轉子電極11之電氣連接路徑之一部份以 轉子3自身帶來，但不以金屬構成轉子全部，例如以鋁等 之電氣絕緣體構成，將其中需要的部份以導體形成之物置 換亦可。 又，在圖示之實施形態中，定子2係由介電質形成， 其內部形成有定子電極5及6，且其外表面上以導電膜形 成有定子端子7及8之構造，但，例如將定子電極形成於 外表面i:，或電介質以和定子不同的部件構成，或以金痛— 板構成定子端子亦可。 【發明的效果】 如上所述，此發明中，電氣連接於轉子電極，具有相 對於定子以可轉動的方式收容轉子之形狀之導電性的端蓋 ，係由帶來接觸電阻較大之表面的金屬構成，又，端蓋之 至轉子電極之電氣連接路徑，包含端蓋之內側底面與被電 氣連接於轉子電極之導體接觸之部份，在該種可變電容中 本紙張尺度適用中國國家標隼（CNS ) A4規格（210X297公釐） 414902 經濟部智慧財產局員工消費合作社印製 五、發明説明（丨I) ，至少在端蓋之內側底面，因爲施有爲帶來接觸電阻較小 具安定之表面之表面處理，在包含於上述電氣連接路徑之 端蓋之內側底面與被電氣連接於轉子電極之導體接觸之部 份，具極佳之耐環境性，且可確保安定之電氣接觸。 此發明中，構成端蓋之金屬係帶來焊接性較差之表面 的金屬，在端蓋與轉子端子結合成一體之情況中，當至少 在轉子端子上實施爲提昇焊接性之表面處理時，於配線基 板上組裝可變電容之際，焊錫被良好的付著，可提昇組裝 之可信度。 如上述之轉子端子沿定子延伸時，爲提昇焊接性之表 面處理僅實施在轉子端子向外側之面上時，可迴避組裝時 付與之焊錫，發生不期待之，滲入端蓋之內部，同時，熔 接劑滲入端蓋內之各要件間之接觸部份之不良狀況。 又，如上述之爲帶來接觸電阻小且安定之表面的表面 處理和爲提昇焊接性之表面處理，例如說，像金、錫或銀 的電鍍般，在互爲相同之表面處理時，此等表面處理可以: 相同的歩驟實施，可有效率的達成期望之表面處理。… 又，前述端蓋上，形成有容許操作前述轉子轉動之工 具插入之調整用孔，同時在前述調整用孔之周圍設有將前 述轉子壓接向前述定子之彈簧作用部° 又，前述轉子係由導電性之金屬構成，前述電氣連接 路徑之一部份係由轉子本身帶來。 前述端蓋內側底面與前述轉子間’配置有導電性之弾 簧墊片，前述端蓋內側底面所接觸之導體係前述彈賛塾片 ('諳先閲讀背面之注意事項再 -裝· 訂- 線. 本紙張尺度適用中國國家標芈（CNS〉Λ4規格（210 X 297公釐〉 A7 414902 __ B7 五、發明説明（I>) 〇 前述定子係由電介質構成，具有在內部形成前述轉子 電極，且在外表面上以導電膜形成有前述定子端子之構造 〇 〆. 【圖式之簡單說明】 圖1係顯示本發明之一實施形態之可變電容的外觀， (1)係俯視圖、⑵係前視圖、⑶係右側視圖、⑷係仰視圖 〇 圖2係圖1中⑴之沿線A-A之截面圖。 圖3係圖2中所示之施於端蓋4上之表面處理的情況 以圖解顯示之截面圖。 圖4係以相當於圖2之截面圖，顯示可變電容1安裝 於配線基板23之狀態。 圖5係相當於圖3之圖，顯示施於端蓋4上之表面處 理之他種情況。· 圖6係對應於圖4之圖，顯示可變電容1安裝於配線 基板23之狀態中，焊錫24滲入不期望之部份之狀態。％ ~ 圖7係相當於圖3之圖，顯示施於端蓋4上之表面處 理之另一之他種情況。 圖8係相當於圖3之圖，顯示施於端蓋4上之表面處 理之另一之他種情況。 【符號的說明】 1 可變電容 2 定子 '(#先閲讀背面之注意事項再1^^^ -裝. 線 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標隼（CNS ) A4規格（210 X 297公釐） 414902 五、發明説明（β) A7 B7 經濟部智慧財產局員工消費合作社印製 3 轉子 4 端蓋 5，6 '定子電極 7，8 - 定子端子 11 轉子電極 13 起子槽 14 調整用孔 15 . 彈簧作用部 18 轉子端子 19 內側底面 20 彈簧墊片 21，22，25，26，27，28 表面處理 C請先Μ讀背面之注意事項再t本頁) 裝. 訂 線· -L5- 本紙張尺度適用中國囷家標準（CNS ) Α4規格（210 X 29"7公釐）11T line 414902 at _B7 V. Description of the invention (7) The inner bottom surface 19 is provided with a surface treatment 21 to bring about a low and stable contact resistance, and the rotor terminal 18 is provided with a surface treatment 22 for improving solderability. The surface treatment 22 applied to the rotor terminal 18 is sufficient as long as it can reach above the stator 2 when viewed from the position of the relationship with the stator 2 indicated by the imaginary line. The above-mentioned surface treatments 21 and 22 are mutually the same surface treatment in this embodiment, for example, electroplating of gold, tin or silver is applied. This kind of plating of gold, tin or silver, in addition to bringing a stable surface with low contact resistance, also improves solderability. Therefore, according to this embodiment, the surface treatment 21 applied to the inner bottom surface 19 of the end cap 4 can ensure better environmental resistance with the spring washer 20, and has small contact resistance and stable electrical contact. As shown in FIG. 4, when the variable capacitor 1 is assembled on the wiring substrate 23, the solder 24 (shown by a coating) for assembly is well applied to the rotor terminal 18, and the reliability of assembly is improved. FIG. 5 is equivalent to FIG. 3 and shows a surface treatment applied to the end cap 4. " Referring to Fig. 5, the surface treatment 25 is applied not only to the inner bottom surface of the end cover 4 and the rotor terminals, but also to almost the entire surface. This surface treatment 25 is the same as the aforementioned surface treatments 21 and 22, in addition to bringing a stable and low-contact surface, and also improving solderability, such as gold, tin or silver plating. • Even if the surface treatment 25 is implemented in the form shown in FIG. 5, the same effect can be obtained as the surface treatments 21 and 22 of the aforementioned FIG. 3. The paper size applies the Chinese National Standard (CNS) A4 specification ( 210 X 297 mm) (# 先 ® ^ Notes on the back page-booking and binding printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs printed A7 B7 41490 ^ V. Description of invention (g) (谙 Please read the notes on the back first Matters are as shown in the above-mentioned various forms of surface treatment shown in FIG. 3 and FIG. 5. If attention is paid to the part of the rotor terminal 18, the surface treatment 22 in FIG. 3 and the surface treatment 25 in FIG. 5 are applied to the rotor terminal 18. Both sides. Therefore, even the undesirable situation that the solder 24 and the welding agent (not shown) for the assembly penetrate into the unexpected part may occur. For example, when the coating amount of the milky solder is too much, the solder 24 penetrates into the inside of the end cap 24, causing The rotor 3 is fixed by the solder 24, or the welding agent penetrates into the contact parts of the end cover 4 and the spring washer 21, the spring washer 20 and the rotor 3, the rotor electrode 11 and the stator 2, and the electrical contact is damaged. To avoid such problems, it is best to Use the following surface treatment forms shown in Figure 7 and Figure 8. Figures 7 and 8 are equivalent to Figure 3, respectively, and show other forms of surface treatment applied to the end cap 4. Employees, Bureau of Intellectual Property, Ministry of Economic Affairs Consumption cooperation Du printed Figure 7, which is the same form as the surface treatment 21 on the inner bottom surface 19 of the end cap 4 shown in FIG. 3, and the inner bottom surface of the end cap 4 is provided with a surface that has low contact resistance and is stable. In addition to the surface treatment 26 on the rotor terminal 18, the surface treatment 27 to improve the weldability is applied only to the true outward side. 'Dagger: In the embodiment, the surface treatment 26 and 27 can also be used as gold , Tin or silver plating, etc., are the same surface treatment. In FIG. 8, except for the inward facing surface of the rotor terminal 18, the surface of the end cap 4 is almost completely covered with a surface treatment 28. This surface treatment 28, In addition to bringing a stable and stable surface with low contact resistance, it is also used to improve the solderability, and is the same as the aforementioned various surface treatments. Gold, tin or silver plating. According to this, the surface treatment form shown in Fig. 7 and Fig. 8 Due to the orientation —--------- Ιΰ _________ This paper size applies to China Home standard {CNS) Λ4 specification (210 X297 mm) 414902 λ7 _ _B7 __ V. Description of the invention (f) No surface treatment 27 or 28 is applied to the inner surface of the rotor terminal 18, like stainless steel of the material of the end cover 4 The metal from the surface with poor solderability is exposed as it is. Therefore, as shown in FIG. 6, it is possible to surely prevent the solder 24 for assembly from penetrating into the inside of the end cover 4, or the welding agent from penetrating into the contact portions of the various elements in the end cover 4. 4 and the like, as shown in Fig. 4, the correct payment state can be surely achieved. In the above, the embodiment related to the present invention shown in the figure has been described. Within the scope of the present invention, there can be various other forms. Modification. For example, in the illustrated embodiment, stainless steel is used as the metal that constitutes the surface of the end cap 4 with a large contact resistance, but other metals may be used. In the illustrated embodiment, the metal constituting the end cap 4 is, like stainless steel, a metal that not only brings a surface with a large contact resistance but also a surface with poor solderability, but the end cap in this invention 4. Although it brings a surface with a larger contact resistance, it can also be composed of a metal that brings a surface with good weldability. In addition, in the illustrated embodiment, as described above, the metal constituting the end cap 4 is a material that brings both a surface with a large contact resistance and a surface with poor solderability. The surface treatment on the inner bottom surface 19 of the cover 4 and the rotor terminal 18 uses a surface treatment that has a function of bringing about a low and stable contact resistance surface and a function of improving solderability, but to bring about a small and stable contact resistance The surface treatment of the surface and the surface treatment for improving weldability are different types of surface treatments. For example, the former surface treatment is applied to the inner bottom surface 19 of the end cap 4, and the latter surface treatment is applied to the rotor. ______U______ This paper size applies China National Standard (CNS) A4 specification (210X297 mm) 414902 A7 ____ _B7_________ 5. Description of the invention ([Ό) Terminal 18 is also available. In addition, as the surface treatment having the above-mentioned common function, gold, tin, or silver power ore is used, but power ore of other metals or other surface treatment methods can also be used. Also, regarding the variable capacitor to which the present invention is applied, Structure, in the embodiment shown in the figure, a spring washer 20 is arranged between the inner bottom surface 19 of the end cover 4 and the rotor 3, but this type of spring washer is omitted, and the inner bottom surface 19 of the end cover 4 is directly contacted The structure of the rotor 3 is also possible. In the illustrated embodiment, the rotor 3 is made of conductive metal, and part of the electrical connection path of the end cap 4 to the rotor electrode 11 is brought by the rotor 3 itself, but the rotor is not made of metal. All of them are made of, for example, an electrical insulator such as aluminum, and the required part may be replaced by a conductor. In the illustrated embodiment, the stator 2 is formed of a dielectric, and the stator electrodes 5 and 6 are formed inside the stator 2 and the stator terminals 7 and 8 are formed on the outer surface with a conductive film. However, for example, The stator electrode may be formed on the outer surface i :, or the dielectric may be formed of a different component from the stator, or the stator terminal may be formed of a gold pain-plate. [Effects of the Invention] As described above, in this invention, an electrically conductive end cap that is electrically connected to the rotor electrode and has a shape that accommodates the rotor in a rotatable manner with respect to the stator is provided with a surface having a large contact resistance. It is made of metal, and the electrical connection path from the end cap to the rotor electrode includes the inner bottom surface of the end cap and the part that is electrically contacted with the conductor electrically connected to the rotor electrode.隼 (CNS) A4 specification (210X297 mm) 414902 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (丨 I), at least on the inner bottom surface of the end cap, because the application has a small contact resistance. The surface treatment of the stable surface, on the inner bottom surface of the end cover included in the electrical connection path, and the portion that is electrically connected to the conductor electrically connected to the rotor electrode, has excellent environmental resistance and can ensure stable electrical contact. In this invention, the metal constituting the end cover is a metal that brings a surface with poor weldability. In the case where the end cover is integrated with the rotor terminal, when at least the rotor terminal is subjected to a surface treatment to improve the weldability, the When the variable capacitor is assembled on the wiring substrate, the solder is well attached, which can improve the reliability of the assembly. As described above, when the rotor terminal extends along the stator, the surface treatment to improve the solderability is only applied to the outer side of the rotor terminal, and the solder applied during assembly can be avoided, which can cause unexpected penetration and penetrate into the inside of the end cover. , Defective condition of the contact part where the welding agent penetrates into the various elements in the end cap. In addition, as mentioned above, the surface treatment for bringing a stable and low contact resistance surface and the surface treatment for improving the solderability, for example, like gold, tin or silver plating, when the surface treatments are the same, The surface treatment can be carried out in the same step, which can effectively achieve the desired surface treatment. ... and the end cover is formed with an adjustment hole allowing insertion of a tool for operating the rotor to rotate, and a spring action portion for crimping the rotor to the stator is provided around the adjustment hole. It is made of conductive metal, and part of the electrical connection path is brought by the rotor itself. Between the inner bottom surface of the end cover and the rotor, a conductive reed washer is arranged, and the guide system in contact with the inner bottom surface of the end cover is a spring-like cymbal ('谙 first read the precautions on the back before you install-order- The size of this paper applies to the Chinese national standard (CNS> Λ4 specification (210 X 297 mm> A7 414902 __ B7) V. Description of the invention (I >) 〇 The stator is made of a dielectric and has the rotor electrode formed inside, The aforementioned structure of the stator terminal is formed by a conductive film on the outer surface. [Simplified description of the figure] FIG. 1 shows the appearance of a variable capacitor according to an embodiment of the present invention. View, ⑶ is a right side view, ⑷ is a bottom view. Figure 2 is a cross-sectional view taken along the line AA in Figure 1. Figure 3 is a diagram showing the surface treatment applied to the end cap 4 shown in Figure 2. Fig. 4 is a cross-sectional view corresponding to Fig. 2 and shows a state where the variable capacitor 1 is mounted on the wiring substrate 23. Fig. 5 is a diagram corresponding to Fig. 3 and shows other surface treatments applied to the end cap 4. This situation. · Figure 6 corresponds to Figure 4 The figure shows the state in which the variable capacitor 1 is mounted on the wiring substrate 23, and the solder 24 has penetrated into an undesired part.% ~ FIG. 7 is a diagram corresponding to FIG. 3 and shows the surface treatment applied to the end cap 4. Another situation. Fig. 8 is a diagram corresponding to Fig. 3 and shows another situation of surface treatment applied to the end cover 4. [Description of Symbols] 1 Variable Capacitor 2 Stator '(# 先Read the notes on the back 1 ^^^ -pack. Printed on the paper by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Online Economics. The paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) 414902 5. Description of the invention ( β) A7 B7 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economy 3 Rotor 4 End caps 5, 6 'Stator electrode 7, 8-Stator terminal 11 Rotor electrode 13 Screwdriver slot 14 Adjustment hole 15. Spring acting portion 18 Rotor terminal 19 Inside bottom surface 20 Spring washer 21, 22, 25, 26, 27, 28 Surface treatment C Please read the precautions on the back side before t this page.) Binding. -L5- This paper size applies Chinese standard CNS) Α4 size (210 X 29 " 7 mm)