1301624 九、發明說明： 【發明所屬之技術領域】 本發明係關於可變電阻器之構造，該可變電阻器使用於音 響機器等’藉由操作紐而進行旋轉操作，以調節音量等。 【先前技術】 作為先前之可變電阻器之構造，眾所周知的是，在被保持 於外设内之开>成有電阻體等之絕緣基板上，對向配置具有導 電性滑動件之旋轉體，使旋轉體隨著操作軸之旋轉操作而旋 轉並使滑動件與電阻體滑接，藉此檢測電阻值之變化（例 如，參照專利文獻1)。 圖9表示此先前之可變電阻器之構造。圖9係表示先前之可 變電阻器之剖面圖。 /圖中軸承51藉由壓鑄鋅以一體成形加工成大致圓筒狀而 形成。於該軸承51上，設有圓冑狀軸部51a，於軸部51a上， 形成插入有操作軸之貫通孔51c。[Technical Field] The present invention relates to a configuration of a variable resistor for use in a sound machine or the like to perform a rotation operation by an operation button to adjust a volume or the like. [Prior Art] As a structure of a conventional variable resistor, it is known that a rotating body having a conductive slider is disposed oppositely on an insulating substrate that is held in a peripheral device and has a resistor or the like. The rotating body is rotated in accordance with the rotation operation of the operating shaft, and the slider is slidably connected to the resistor body, thereby detecting a change in the resistance value (for example, refer to Patent Document 1). Fig. 9 shows the construction of this prior variable resistor. Figure 9 is a cross-sectional view showing a prior variable resistor. In the figure, the bearing 51 is formed by die-casting zinc into a substantially cylindrical shape by integral molding. The bearing 51 is provided with a rounded shaft portion 51a, and a through hole 51c into which the operation shaft is inserted is formed in the shaft portion 51a.
呆由52包含合成樹月旨等絕緣材料，形成為大致圓柱狀 Γ亥操作軸52之前端部，設有操作部❿，其貫通軸承5U 並向外方突出，於後端部，形成有大致_ 板等之:二 外側，固著有包含作為導電材料之金肩 、-動件53。又，於旋轉體似之 座叫，其包含連續於心圓上之由複數山部^有凹淘 驅動體54包含人士、此咏 σ 又，於驅動體5之面“絕緣材料，形成為大致環狀。 體4之-面，形成有凹鎖座54e，其包含連續於 109644.doc 1301624 同心圓上之複數山部與谷部。 彈簧構件55包含磷青銅板或不銹鋼板等具有彈性之金屬 板’形成為大致環狀。於該彈簧構件55上，f折成立起狀態 而形成有彈簧片55ee由該彈簧構件55對驅動體冲旋轉體 5 2b側施力。 電阻基板56包含苯酚樹脂等之絕緣基板，於其一面，設有 藉由炭墨印刷而形成之圓弧狀電阻體（未圖示）。又，於該電 阻體之兩端部上，藉由孔眼部57而固著有端子58。 外殼59係用於將電阻基板56及端子58等保持於内部，其包 含合成樹脂等絕緣材料，並採用插入成形等方法一體形成有 電阻基板56。於該外殼59之中央，設有一同貫通電阻基板％ 之嵌合孔59a，又，於外殼59之前面部，形成有安裝用銷座（未 圖示），其構成電氣構件之蓋，且用於安裝框架6〇。 [專利文獻1]曰本專利特開2000-277308號公報 [發明所欲解決之問題] 然而，於先前可變電阻器之構造中，在將包含苯酚樹脂等 之絕緣基板插入成形於包含合成樹脂等絕緣材料之外殼 時，於絕緣基板與合成樹脂之間會產生極其微小之間隙。而 且，當產生端子鍍層材料之金屬遷移（晶須或遷徙）時，會經 由該間隙而出現端子間短路之問題。 因此，本發明之目的在於解決上述問題點，提供一種將絕 緣基板插入成形於合成樹脂製外殼時，亦難以產生端子間短 路之不良現象，而具有較高可靠性之可變電阻器。 【發明内容】 109644.doc 1301624 為解決上述問題，作為本發明之第味決方法 可變電阻3|描+ & S月之 體及华+Γ 包板狀絕緣基板，其形成有電阻 體及集讀；複數安裝孔，其設置於該絕緣基板之—端側. ==、’其固著於該複數安裝孔上，分別與上述電阻體及 v通，並且從上述絕緣基板之一端側向外方延伸；合 成樹脂製保持構件，其以上述電阻體及集電體露出之狀離： 埋設有上述複數端子之固著部與上述絕緣基板；以及滑動 件’其滑=於上述電阻體與集電體上，於固著在上述絕緣基 板之上述複數端子的固著部之間’設置有絕緣性突條部，其 在與上述絕緣基板之平板面交又之方向上延伸。 又，作為第2解決方法，本發明之可變電阻器於絕緣基板 之上述複數端子的固著部之間，設有凹狀槽部或者貫通之狹 縫部，藉由使上述合成樹脂製保持構件之樹脂之一部分充填 於該槽部或狹縫部内，而形成上述突條部。 又，作為第3解決方法，本發明之可變電阻器將上述槽部 或狹縫部連續設至上述絕緣基板之端緣為止。 又’作為第4解決方法，本發明之可變電阻器之上述突條 部設置於上述絕緣基板之兩面側。 又’作為第5解決方法，本發明之可變電阻器於上述端子 之表面實施鍍錫。 [發明之效果] 如上所述，本發明之可變電阻器包括··平板狀絕緣基板， 其形成有電阻體及集電體；複數安裝孔，其設置於絕緣基板 之一端側；複數端子，其固著於複數安裝孔上，並分別與電 109644.doc 1301624 阻體及集電體導通，並且從絕緣基板之一端側向外方延伸，· 合成樹脂製保持構件，其以電阻體與集電體露出之狀態，埋 設有複數端子之固著部與絕緣基板；以及滑動件，其滑動於 電阻體及集電體上，並且在固著於絕緣基板之複數端子的固 著部之間，設置有絕緣性突條部，其在與絕緣基板之平板面 交叉之方向上延伸，因此，藉由絕緣性突條部而抑制相鄰端 子間於端子上實施鍍材等金屬之遷移或轉移，故難以產生端 子間之短路，可靠性提高。 又，於絕緣基板之複數端子的固著部之間，設有凹狀槽部 或貫通之狹縫部，藉由使合成樹脂製保持構件之樹脂之一部 分充填於該槽部或狹縫部内，而形成突條部，故在將絕緣基 板内插入成形於合成樹脂製保持構件時，可利用樹脂之一部 分而形成突條部，因此生產性良好。 又，將槽部或狹縫部連續設至絕緣基板之端緣，故直至絕 緣基板之端緣為止形成有突條部，因此金屬之遷移或轉移效 果提高。 又’突條部設置於絕緣基板之兩面側，故可抑制於絕緣基 板之兩面產生之金屬遷移或轉移，並謀求效果之提高。 又’於端子表面實施鍍錫，故不覆蓋焊錫，因此可實現無 錯化，並且可抑制隨著錫晶須產生而導致端子間之短路。 【實施方式】 以下，圖丨至圖8表示本發明之實施方式。圖丨係表示本發 明之可變電阻器之剖面圖，圖2係表示本發明之絕緣基板與 保持構件之前視圖’圖3係圖2中3_3線之剖面圖，圖4係圖2 109644.doc 1301624 中4-4線之剖面圖，圖5係表示將本發明之端子固著之絕緣基 板之前視圖，圖6係圖5之後視圖，圖7係圖5之7-7線之剖面 圖’圖8係表示本發明之絕緣基板之前視圖。 圖中，本發明之可變電阻器包括··操作軸1 ;軸承2，可旋 轉地保持該操作軸1 ;驅動體3，具有扭矩產生用板彈簧4， 並能夠隨著操作軸1之旋轉而旋轉；滑動件承塊5，具有滑動 件6 ’並扣合於驅動體3而能夠與之一同旋轉；絕緣基板7， 設置有滑動件6滑接的電阻體8與集電體9，並被一體埋設保 持構件11 ;端子10，固著於絕緣基板7上；以及蓋12，覆蓋 保持構件11之背面側。 操作軸1包含合成樹脂等絕緣材料或鋁等金屬材料，其具 有從軸承2向外方突出之操作部la;可旋轉地插通軸承2之軸 部lb;以及向轴部lb之後方突出之非圓形驅動部lc。於該驅 動部lc上扣合有驅動體3，使驅動體3隨著操作轴1之旋轉而 旋轉。 軸承2藉由將鋅等金屬材料壓鑄成形而形成，其具有基部 2a與筒狀部2b。於筒狀部2b插通有操作軸1之軸部b，於基 部2a側突出有驅動部1 c。 驅動體3包含合成樹脂等絕緣材料，其包括圓板狀基板部 3a，該圓板狀基板部3a具有於中央插通有驅動部1(：之非圓形 孔（例如橢圓孔）3c ;以及擋止部3b，該擋止部儿從基板部“ 之外周突出。又，於非圓形孔3c之周緣，設置有一對圓弧狀 凸部3d，其夾隔孔而對向，該圓弧狀凸部3d與滑動件承塊$ 之未圖示之凹部嵌合，使滑動件承塊5與驅動體3卡合，並可 109644.doc -10 - 1301624 一體旋轉。 又，於驅動體3之基板部3a之一面側（對向於軸承2之面 側），女裝有包含具有彈性之金屬板之扭矩產生用板彈簧4， 於驅動體3旋轉時，藉由板彈簧4與軸承2之基部以之内面滑 接’使操作軸1產生旋轉時之扭矩（產生厚重感）。 滑動件承塊5由合成樹脂等絕緣材料而形成為圓板狀，其 中央具有圓形孔5a，插通有操作軸1之驅動部丨c，於該圓形 孔5a之周緣，設置有未圖示之一對圓弧狀凸部，其夾隔孔而 對向；以及未圖示之一對凹部，其同樣位於該凸部之間。該 一對凹部嵌合有驅動體3之圓弧狀凸部3d。 又，於滑動件承塊5之一面側（驅動體3所在之面側），固著 有包含具有彈性之導電性金屬板之滑動件6。該滑動件6具有 圓環狀基部6a ;以及從該基部6a因具有彈性而彎折所成之接 點部6b，基部6a利用鉚接等方法固著於設在滑動件承塊5之 一面側之複數銷座5b上。該滑動件6與滑動件承塊5 —同旋 轉’並與形成於絕緣基板7上之電阻體8與集電體9滑接。 絕緣基板7包含苯紛樹脂等之樹脂積層板，其形成為平板 狀，且於中央具有稍大之貫通孔7a。又，如圖8所示，於絕 緣基板7之一面侧（表面側），設有圓環狀集電體9，以包圍貫 通孔7a之周圍，於該集電體9之周圍設有一部分開放之圓弧 狀電阻體8。於此情形下，電阻體8例如藉由印刷炭漿而形 成，集電體9例如於印刷銀漿後，為防止銀之硫化再塗覆炭 而形成。 又，從電阻體8之兩端側以及集電體9之中央，設有朝向絕 109644.doc -11 - 1301624 緣基板7之一端側延伸之引線部8a、9a。於該引線部仏、％ 之前端側，分別設有電極部8b、9b，該電極部8b、9b於特定 長度印刷有銀漿後，對其一部分再塗覆炭而形成。又，前端 側之電極部8b、9b之一部分，呈現出印刷銀漿而形成之銀圖 案狀態’將端子10固著於該銀圖案上，將電阻體8與集電體9 導通。The insulating layer 52 includes an insulating material such as a synthetic tree, and is formed at a front end portion of the substantially cylindrical cymbal operating shaft 52, and is provided with an operation portion ❿ which penetrates the bearing 5U and protrudes outward, and is formed at the rear end portion. _ Board and the like: two outer sides, fixed with a gold shoulder and a moving member 53 as a conductive material. Further, in the case of a rotating body, it is composed of a plurality of mountain portions that are continuous on the center of the circle. The concave motoring body 54 includes a person, and the 咏σ is on the surface of the driving body 5, and the insulating material is formed substantially. The surface of the body 4 is formed with a female lock 54e which comprises a plurality of mountains and valleys continuous on the concentric circles of 109644.doc 1301624. The spring member 55 comprises a resilient metal such as a phosphor bronze plate or a stainless steel plate. The plate member ' is formed in a substantially annular shape. The spring member 55 is formed in a state in which the f-fold is established, and the spring piece 55ee is biased by the spring member 55 to the side of the driving body rotating body 5 2b. The resistor substrate 56 contains a phenol resin or the like. The insulating substrate is provided with an arc-shaped resistor body (not shown) formed by carbon ink printing on one surface thereof, and is fixed to the both end portions of the resistor body by the hole portion 57. The case 59 is provided for holding the resistor substrate 56, the terminal 58 and the like inside, and includes an insulating material such as synthetic resin, and integrally forms the resistor substrate 56 by insert molding or the like. In the center of the case 59, One through the resistance substrate% Further, in the front surface of the outer casing 59, a mounting pin holder (not shown) is formed on the front surface of the outer casing 59, which constitutes a cover for the electric member, and is used for mounting the frame 6A. [Patent Document 1] Japanese Patent Laid-Open No. 2000 In the structure of the conventional variable resistor, when an insulating substrate containing a phenol resin or the like is inserted into an outer casing including an insulating material such as a synthetic resin, the insulating substrate and the insulating substrate are used. There is a very small gap between the synthetic resins. Moreover, when metal migration (whiskers or migration) of the terminal plating material occurs, a problem of short-circuit between terminals occurs through the gap. Therefore, the object of the present invention is to solve the above problems. The problem is to provide a variable resistor having high reliability when inserting and molding an insulating substrate into a synthetic resin case, and it is difficult to cause a short circuit between terminals. [Summary of the Invention] 109644.doc 1301624 The problem is that, as the method of the present invention, the variable resistor 3|correlation + & S month body and the hua+Γ package plate-shaped insulating substrate are formed with a resistor And a plurality of mounting holes, which are disposed on the end side of the insulating substrate. ==, 'which is fixed to the plurality of mounting holes, respectively connected to the resistor body and the v, and from one end side of the insulating substrate a synthetic resin holding member that is exposed such that the resistor body and the current collector are exposed: a fixing portion in which the plurality of terminals are embedded and the insulating substrate; and a sliding member that slides over the resistor body An insulating ridge portion is provided between the fixing portion of the plurality of terminals fixed to the insulating substrate on the current collector, and extends in a direction overlapping the flat surface of the insulating substrate. According to a second aspect of the invention, the variable resistor of the present invention is provided with a concave groove portion or a slit portion penetrating between the fixing portions of the plurality of terminals of the insulating substrate, and the resin of the synthetic resin holding member is provided. A part of the ridge portion is formed by filling a part of the groove portion or the slit portion. Further, as a third solution, the variable resistor of the present invention has the groove portion or the slit portion continuously provided to the edge of the insulating substrate. Further, as a fourth solution, the ridge portion of the variable resistor of the present invention is provided on both sides of the insulating substrate. Further, as a fifth solution, the variable resistor of the present invention is tin-plated on the surface of the above-mentioned terminal. [Effects of the Invention] As described above, the variable resistor of the present invention includes a flat insulating substrate formed with a resistor body and a current collector, a plurality of mounting holes provided on one end side of the insulating substrate, and a plurality of terminals. It is fixed to a plurality of mounting holes, and is electrically connected to the resistor body and the current collector, respectively, and extends outward from one end side of the insulating substrate, and a synthetic resin holding member is formed by a resistor body and a collector. a state in which the electric body is exposed, a fixing portion of the plurality of terminals and an insulating substrate are embedded; and a slider that slides on the resistor body and the current collector, and is fixed between the fixing portions of the plurality of terminals fixed to the insulating substrate, Since the insulating ridge portion is provided to extend in a direction intersecting the flat surface of the insulating substrate, the insulating ridge portion suppresses migration or transfer of metal such as a plating material between the adjacent terminals. Therefore, it is difficult to generate a short circuit between the terminals, and the reliability is improved. Further, a concave groove portion or a slit portion penetrating between the fixing portions of the plurality of terminals of the insulating substrate is provided, and a part of the resin of the synthetic resin holding member is filled in the groove portion or the slit portion. Since the ridge portion is formed by inserting and molding the insulating substrate into the synthetic resin holding member, the ridge portion can be formed by using one of the resins, and the productivity is good. Further, since the groove portion or the slit portion is continuously provided to the end edge of the insulating substrate, the ridge portion is formed up to the edge of the insulating substrate, so that the migration or transfer effect of the metal is improved. Further, since the ridge portions are provided on both sides of the insulating substrate, metal migration or transfer occurring on both surfaces of the insulating substrate can be suppressed, and the effect can be improved. Further, since tin plating is applied to the surface of the terminal, solder is not covered, so that it is possible to achieve error-free, and it is possible to suppress short-circuit between terminals due to generation of tin whiskers. [Embodiment] Hereinafter, Fig. 8 to Fig. 8 show an embodiment of the present invention. Figure 2 is a cross-sectional view showing a variable resistor of the present invention, and Figure 2 is a front view of the insulating substrate and the holding member of the present invention. Figure 3 is a cross-sectional view taken along line 3-3 of Figure 2, and Figure 4 is a view of Figure 2 109644.doc FIG. 5 is a front view of the insulating substrate to which the terminal of the present invention is fixed, FIG. 6 is a rear view of FIG. 5, and FIG. 7 is a sectional view of the line 7-7 of FIG. 8 shows a front view of the insulating substrate of the present invention. In the figure, the variable resistor of the present invention includes an operating shaft 1; a bearing 2 rotatably holds the operating shaft 1; and a driving body 3 having a spring plate 4 for generating torque and capable of rotating with the operating shaft 1 Rotating; the slider block 5 has a slider 6' and is fastened to the driving body 3 to be rotatable together with one; the insulating substrate 7 is provided with the resistor 8 and the collector 9 which are slidably connected to the slider 6, and The holding member 11 is integrally embedded; the terminal 10 is fixed to the insulating substrate 7, and the cover 12 covers the back side of the holding member 11. The operation shaft 1 includes an insulating material such as synthetic resin or a metal material such as aluminum, and has an operation portion 1a that protrudes outward from the bearing 2; a shaft portion 1b that is rotatably inserted into the bearing 2; and a rear portion that protrudes toward the shaft portion 1b Non-circular drive unit lc. The driving body 3 is fastened to the driving portion lc, and the driving body 3 is rotated in accordance with the rotation of the operating shaft 1. The bearing 2 is formed by die-casting a metal material such as zinc, and has a base portion 2a and a tubular portion 2b. The shaft portion b of the operation shaft 1 is inserted into the tubular portion 2b, and the drive portion 1c is protruded from the base portion 2a side. The driving body 3 includes an insulating material such as a synthetic resin, and includes a disk-shaped substrate portion 3a having a driving portion 1 (a non-circular hole (for example, an elliptical hole) 3c inserted in the center thereof; The stopper portion 3b protrudes from the outer periphery of the substrate portion. Further, a pair of arc-shaped convex portions 3d are provided on the periphery of the non-circular hole 3c, and the arc is opposed to the hole. The convex portion 3d is fitted into a recess (not shown) of the slider holder $, and the slider holder 5 is engaged with the driver 3, and can be rotated integrally with the 109644.doc -10 - 1301624. One side of the substrate portion 3a (opposite to the surface side of the bearing 2), the wearer has a spring generating plate spring 4 including a resilient metal plate, and the leaf spring 4 and the bearing 2 are rotated when the driving body 3 rotates. The base portion is slidably connected to the inner surface of the base shaft to cause a torque (a feeling of heavyness) when the operating shaft 1 is rotated. The slider block 5 is formed in a disk shape by an insulating material such as synthetic resin, and has a circular hole 5a at the center thereof. The driving portion 丨c of the operating shaft 1 is provided, and a pair of arcs not shown is provided on the periphery of the circular hole 5a. The convex portions are opposed to each other by a pair of holes, and a pair of concave portions (not shown) are also located between the convex portions. The pair of concave portions are fitted with the arcuate convex portions 3d of the driving body 3. On one side of the slider block 5 (the side of the surface on which the driving body 3 is located), a slider 6 including an elastic conductive metal plate is fixed. The slider 6 has an annular base portion 6a; and from the base portion 6a is a contact portion 6b which is bent by being elastic, and the base portion 6a is fixed to a plurality of pin seats 5b provided on one surface side of the slider block 5 by caulking or the like. The slider 6 and the slider block 5 - the same rotation "and the resistor 8 formed on the insulating substrate 7 is slidably connected to the current collector 9. The insulating substrate 7 includes a resin laminate such as benzene resin, which is formed into a flat shape and has a slightly larger center. Further, as shown in FIG. 8, an annular current collector 9 is provided on one surface side (surface side) of the insulating substrate 7 so as to surround the periphery of the through hole 7a, and the current collector 9 is provided. A part of the open arc-shaped resistor body 8 is provided around. In this case, the resistor body 8 is formed by, for example, printing a carbon paste. The current collector 9 is formed, for example, after printing silver paste, and is formed by preventing the vulcanization of silver and then coating the carbon. Further, from the both end sides of the resistor body 8 and the center of the current collector 9, the direction is set to 109644.doc - 11 - 1301624 Lead portions 8a and 9a extending from one end side of the edge substrate 7. On the front end sides of the lead portions 仏 and %, electrode portions 8b and 9b are respectively provided, and the electrode portions 8b and 9b are printed with silver paste at a specific length. Then, a part of the electrode portions 8b and 9b on the front end side is formed in a silver pattern state in which silver paste is printed, and the terminal 10 is fixed to the silver pattern, and the resistor is placed. The body 8 is electrically connected to the current collector 9.
又，於各個電極部8b、9b之中央部，設有複數安裝孔7b、 7b，包含貫通絕緣基板7之表面與背面之小孔，將包含導電 性金屬板之複數端子1 〇、1 〇，鉚接於擠壓加工而形成圓筒狀 之前端孔眼部10a而固著，（參照圖5〜圖7)。於此情形下，對 端子10實施底層鎳鍍後，於其上面側實施鍍錫。其次，藉由 將端子10固著於安裝孔7b，而使端子1〇與電阻體8及集電體9 分別導通而連接。 即，本實施例中，於端子10之表面不實施焊鍍錫，而是以 鍍錫取代焊鍍錫，藉此謀求環境處理方面之無錯化。 又’於絶緣基板7之複數安裝孔7b、7b之間，在與絕緣基 板7之平板面正交並交叉之方向上，即板厚方向上形成有凹 狀槽部7c。該槽部7c沿著電極部8b、9b，從安裝孔几之上方 延伸至絕緣基板7之端緣，連續形成為長條狀，該槽部乃當 如圖5所示，於電極部8b、9b固著有端子1〇時，形成為位於 各個端子10之間。再者，該槽部乃於呈現出電極部朴、外之 邛刀即銀圖案部分之間，在完全遮蔽之範圍内形成長條 狀。 又’於絕緣基板7之對向於形成有電阻體8及導雷體 109644.doc -12- 1301624 面側的另一面侧（背面侧）’在與槽部7c對向之位置上，同樣 形成有於板厚方向上呈凹狀之槽部7d。該槽部7d同樣從安裝 孔7b之上方至絕緣基板7為止連續形成為長條狀，該槽部^ 當如圖6所示，於電極部8b、9b上固著有端子1〇時，形成為 位於將各個端子10鉚接而成為固著部之孔眼部i〇a之間。 即，對向於絕緣基板7之兩面側而設有同樣之槽部乃、7d， 該等槽部7e、7d’於至少設有各個槽部7e、7d之絕緣基板7 之一面侧與另一面侧的端子10之各個部分（固著部）之間，在 上述端子10之延伸方向完全隔開之範圍内形成為長條狀。 作為槽部7c、7d之形成方法，可藉由衝壓加工等方法簡單 形成’亦可藉由對絕緣基板7之表面與背面實施雷射加工而 形成，此時可形成精度優良且無裂紋等產生之槽部7c、Μ。 又，作為槽部7c、7d之形狀，可為v字形、u字形、角形之任 意形狀，而U字形於加工性等方面適合。 再者，未圖示，亦可取代槽wc、7d，設置從安裝孔几之 • 上方至絕緣基板之端緣為止連續形成為長條狀、並貫通於絕 緣基板7之表面與背面之狹縫部。 保持構件11由合成樹脂等絕緣材料而形成為大致矩形形 狀。如圖2、圖3所示，採用插入成形等方法將絕緣基板7一 體埋設於保持構件11内，於保持構件11之-面側，形成有圓 y第開口 °卩1 la ’於該第1開口部1 la之内底部，將電阻體 8與集電體9以露出狀態而配設。又’藉祕持構件u將絕緣 基板7之周緣部與端子1G之固著部—體埋設，並且從絕緣基 板7之底面側（圖2、圖3之下方側）突出形成有端子心 109644.doc -13· 1301624 又’於設在絕緣基板7之端子1 〇之固著部之間的槽部7c、 7d内，在一體埋設於保持構件u内時，以合成樹脂製保持構 件11之樹脂之一部分充填，藉此沿著槽部7〇、7d之形狀而形 成突出之突條部lib、11c。該突條部llb、llc係於絕緣基板7 的複數端子10之固著部之間，以與絕緣基板7之平板面成正 父狀恶而突出（延伸）於交叉方向上，如圖4所示，該突條部 Ub、lie形成於絕緣基板7之兩面側。 本實施例中，對端子1〇之表面實施鍍錫以取代焊鍍錫，故 由於未覆蓋焊錫而可實現無鉛化，然而此情形下，伴隨錫晶 /員之產生’於端子10、10之間可能會發生短路。為防止該短 路’於本實施例中，在絕緣基板7之複數端子10之固著部之 間，設置有凹狀槽部7c、7d，並且於該等槽部7c、7d内充填 合成樹脂製保持構件11之樹脂之一部分，藉此形成突條部 lib v lie 〇 於絕緣基板7與保持構件11進行插入成形時，該突條部 lib、lie形成壁，利用該壁可隔斷插入成形時絕緣基板7與 保持構件11之間所產生之沿著絕緣基板7之平板面的微小間 隙’因此可抑制隨著具有直線延伸傾向之錫晶須之產生而造 成的端子10、10間之短路。 又，於此情形下，將槽部7c、7d連續設至絕緣基板7之端 緣為止’並且設置於絕緣基板7之兩面侧（表面側與背面側）， 故直至絕緣基板7之端緣為止，形成有突條部ub、lie，由 此可提高對金屬遷移或轉移之抑制效果。 又，於保持構件11之四個角部，設有貫通孔丨ld，藉由將 109644.doc -14 - 1301624 包含棒狀金屬材料之鉚釘13插通該貫通孔1 id，而將保持構 件11安裝於軸承2之基部2a之後面侧。又，在與設於保持構 件11之一面側之第1開口部11a對向之另一面側，同樣設有圓 形第2開口部lie，於該第2開口部lle内，可旋轉地收納有驅 動體3之基板部3a，並且於絕緣基板7之貫通孔7a内插通有圓 弧狀凸部3d。又，於第2開口部lie中，設有擋止用突壁部Uf， 藉由驅動體3之擋止部3b與突壁部Uf之抵接，而限制操作 之旋轉。 ® 又，於第1開口部11a内收納有滑動件承塊5，插通於絕緣 基板7之貫通孔7a内之驅動體3的圓弧狀凸部3d，嵌合於設在 圓形孔5 a之周緣而未圖示之一對凸部之間所設置之一對凹 部（未圖示），藉此使滑動件承塊5與驅動體3能夠一體旋轉。 即，當操作軸1旋轉操作時，隨著驅動體3之旋轉，滑動件承 塊5亦旋轉，固著於滑動件承塊5之滑動件6之接點部6b、 形成於絕緣基板7之電阻體8以及集電體9相互滑接。 • 於保持構件11之第1開口部11 a側，安裝有包含合成樹脂等 絕緣材料之矩形蓋12，使用鉚釘13鉚接而安裝。即， 、I，保持構 件11以被夾持於軸承2與蓋12之間之狀態而一體安震。 根據上述本發明之實施例，於形成有電阻體8及集電體9之 平板狀絕緣基板7之一端侧設置有複數安裝孔几，於該複數 女裝孔7b内固著有複數端子1〇，其分別與上述電阻體8及集 電體9導通，並且從上述絕緣基板7之一端側向外方而延伸^ 於上述電阻體8及集電體9露出之狀態下，將上述複數端子 之固著部與上述絕緣基板7埋設於合成樹脂製保持構件^ 109644.doc -15- 1301624 内，並且於上述絕緣基板7之複數端子丨〇之固著部之間，設 置有凹狀槽部7c、7d，於該等槽部7c、7d内充填有合成樹脂 製上述保持構件丨丨之樹脂之一部分，藉此設有在與上述絕緣 基板7之平板面正交並交叉之方向、即板厚方向上延伸之絕 緣性突條部lib、lie，並利用該等絕緣性突條部nb、nc， 抑制於相鄰端子10、10之間對端子10、1〇實施包含錫或銀之 鍍材等之金屬遷移或轉移（錫晶須與銀遷徙），故難以產生端 子10 ' 10間之短路，可靠性提高。 又藉由充填合成樹脂製上述保持構件11之樹脂之一部 刀而形成有上述突條部1 lb、1 lc，故於將上述絕緣基板7 插入成形於合成樹脂製上述保持構件丨丨時，利用樹脂之一部 刀了易於形成上述突條部11 b、11 C，因此生產性優良。 再者，本發明之突條部lib、lie並未限於利用保持構件11 樹月曰之°卩分所形成之上述實施例，例如，亦可於絕緣基 板7之平板面上，塗敷絕緣性接著劑，並使該接著劑形成於 與絶緣基板7之平板面交叉之方向上，以作為突條部。 【圖式簡單說明】 圖1係表示本發明之可變電阻器之剖面圖。 圖2係表示本發明之可變電阻器之絕緣基板與保持構件之 如視圖。 圖3係本發明之圖2中3_3線之剖面圖。 圖4係本發明之第2中4-4線之剖面圖。 圖5係表示將本發明之可變電阻器之端子固著的絕緣基板 之前視圖。 109644.doc -16- 1301624 圖6係表示將本發明之可變電阻器之端子固著的絕緣基板 之後視圖。 圖7係本發明之圖5中7-7線之剖面圖。 圖8係表示本發明之可變電阻器的絕緣基板之前視圖。 圖9係表示先前之可變電阻器之剖面圖。 【主要元件符號說明】Further, a plurality of mounting holes 7b and 7b are provided in a central portion of each of the electrode portions 8b and 9b, and include a small hole penetrating through the front surface and the back surface of the insulating substrate 7, and a plurality of terminals 1 and 1 including a conductive metal plate are placed. The cylindrical end portion eyelet portion 10a is caulked and pressed to be fixed by extrusion (see FIGS. 5 to 7). In this case, after the underlying nickel plating is applied to the terminal 10, tin plating is performed on the upper surface side. Next, by fixing the terminal 10 to the mounting hole 7b, the terminal 1A is electrically connected to the resistor body 8 and the current collector 9, respectively. That is, in the present embodiment, solder plating is not performed on the surface of the terminal 10, and tin plating is replaced by tin plating, thereby achieving environmentally sound processing. Further, between the plurality of mounting holes 7b and 7b of the insulating substrate 7, a concave groove portion 7c is formed in a direction orthogonal to and intersecting with the flat surface of the insulating substrate 7, i.e., in the thickness direction. The groove portion 7c extends from the upper side of the mounting hole to the end edge of the insulating substrate 7 along the electrode portions 8b and 9b, and is continuously formed in an elongated shape. The groove portion is formed in the electrode portion 8b as shown in FIG. When 9b is fixed with the terminal 1〇, it is formed between the respective terminals 10. Further, the groove portion is formed in a strip shape between the silver pattern portions which are the ridges of the electrode portion and the outer knives. Further, the other surface side (back side) of the surface of the insulating substrate 7 on which the resistor body 8 and the lightning conductor 109644.doc -12-1301624 are formed is formed in the same position as the groove portion 7c. There is a groove portion 7d which is concave in the thickness direction. Similarly, the groove portion 7d is formed in a continuous shape from the upper side of the mounting hole 7b to the insulating substrate 7, and the groove portion is formed as shown in Fig. 6 when the terminal 1 is fixed to the electrode portions 8b and 9b. It is located between the eyelet portions i〇a which are caulked to form the fixing portions. That is, the same groove portion 7d is provided on both sides of the insulating substrate 7, and the groove portions 7e, 7d' are on one side and the other side of the insulating substrate 7 provided with at least the respective groove portions 7e, 7d. The respective portions (fixing portions) of the terminal 10 are formed in an elongated shape in a range in which the extending direction of the terminal 10 is completely separated. The method of forming the groove portions 7c and 7d can be easily formed by a method such as press working, or can be formed by performing laser processing on the front surface and the back surface of the insulating substrate 7. In this case, precision can be formed without cracks. The groove portion 7c, Μ. Further, the shape of the groove portions 7c and 7d may be any shape of a v-shape, a u-shape, or an angular shape, and the U-shape is suitable for workability and the like. Further, instead of the grooves wc and 7d, the slits wc and 7d may be formed so as to be continuously formed in a long shape from the upper side of the mounting hole to the edge of the insulating substrate, and penetrate the slit portion on the front surface and the back surface of the insulating substrate 7. . The holding member 11 is formed in a substantially rectangular shape from an insulating material such as synthetic resin. As shown in FIG. 2 and FIG. 3, the insulating substrate 7 is integrally embedded in the holding member 11 by insert molding or the like, and a circle y first opening ° 卩 1 la ' is formed on the surface side of the holding member 11 The inner bottom portion of the opening portion 1 la is disposed so that the resistor body 8 and the current collector 9 are exposed. Further, the peripheral portion of the insulating substrate 7 and the fixing portion of the terminal 1G are embedded by the holding member u, and the terminal core 109644 is formed to protrude from the bottom surface side (the lower side of FIGS. 2 and 3) of the insulating substrate 7. Doc -13· 1301624 Further, when the ink is provided in the groove portions 7c and 7d between the fixing portions of the terminal 1 of the insulating substrate 7 and is integrally embedded in the holding member u, the resin of the holding member 11 made of synthetic resin is used. A part of the filling is carried out, whereby the protruding ridge portions lib and 11c are formed along the shapes of the groove portions 7A and 7d. The ridge portions 11b and 11c are formed between the fixing portions of the plurality of terminals 10 of the insulating substrate 7, and are protruded (extending) in the intersecting direction with the flat surface of the insulating substrate 7, as shown in FIG. The ridge portions Ub and lie are formed on both sides of the insulating substrate 7. In this embodiment, tin plating is applied to the surface of the terminal 1〇 instead of soldering tin, so lead-free can be realized because the solder is not covered. However, in this case, the tin crystal/member is produced in the terminals 10 and 10. A short circuit may occur between them. In order to prevent this short circuit, in the present embodiment, concave groove portions 7c and 7d are provided between the fixing portions of the plurality of terminals 10 of the insulating substrate 7, and the groove portions 7c and 7d are filled with synthetic resin. One portion of the resin of the holding member 11 is thereby formed as a ridge portion lib v lie. When the insulating substrate 7 and the holding member 11 are insert-molded, the rib portions lib and lie form a wall, and the wall can be used to block insulation during insertion molding. The minute gaps along the flat surface of the insulating substrate 7 which are generated between the substrate 7 and the holding member 11 can thus suppress short-circuiting between the terminals 10 and 10 due to the occurrence of tin whiskers having a tendency to extend linearly. In this case, the groove portions 7c and 7d are continuously provided to the edge of the insulating substrate 7 and are provided on both sides (front surface side and back surface side) of the insulating substrate 7, so that the edge of the insulating substrate 7 is not provided. The ribs ub and lie are formed, thereby suppressing the effect of inhibiting metal migration or migration. Further, through holes 丨ld are provided at the four corners of the holding member 11, and the holding member 11 is inserted by inserting the rivet 13 including the rod-shaped metal material 109644.doc -14 - 1301624 into the through hole 1 id. Mounted on the back side of the base 2a of the bearing 2. Further, a circular second opening portion lie is provided in the same manner as the other surface side opposite to the first opening portion 11a provided on one surface side of the holding member 11, and the second opening portion lle is rotatably accommodated in the second opening portion lle. The substrate portion 3a of the driving body 3 has an arc-shaped convex portion 3d inserted into the through hole 7a of the insulating substrate 7. Further, in the second opening portion lie, a stopper protruding portion Uf is provided, and the stopper portion 3b of the driving body 3 abuts against the protruding wall portion Uf to restrict the rotation of the operation. Further, the slider holder 5 is housed in the first opening 11a, and the arcuate projection 3d of the driving body 3 inserted through the through hole 7a of the insulating substrate 7 is fitted to the circular hole 5 One of the peripheral edges of a is not shown, and one pair of concave portions (not shown) are provided between the convex portions, whereby the slider holder 5 and the driving body 3 can be integrally rotated. That is, when the operating shaft 1 is rotated, the slider block 5 is also rotated as the driving body 3 rotates, and is fixed to the contact portion 6b of the slider 6 of the slider holder 5, and formed on the insulating substrate 7. The resistor body 8 and the current collector 9 are slidably coupled to each other. • A rectangular cover 12 containing an insulating material such as synthetic resin is attached to the first opening 11 a side of the holding member 11, and is attached by caulking with a rivet 13 . Namely, I and I hold the member 11 in an integrated state in a state of being sandwiched between the bearing 2 and the cover 12. According to the embodiment of the present invention, a plurality of mounting holes are provided on one end side of the flat insulating substrate 7 on which the resistor body 8 and the current collector 9 are formed, and a plurality of terminals 1 are fixed in the plurality of women's holes 7b. Each of the resistor body 8 and the current collector 9 is electrically connected to the resistor body 8 and the current collector 9 and extends outward from one end side of the insulating substrate 7 so that the resistor body 8 and the current collector 9 are exposed, and the plurality of terminals are The fixing portion and the insulating substrate 7 are embedded in the synthetic resin holding member ^109644.doc -15-1301624, and a concave groove portion 7c is provided between the fixing portions of the plurality of terminal turns of the insulating substrate 7. And the groove portions 7c and 7d are filled with a portion of the resin of the holding member made of a synthetic resin, and the plate thickness is orthogonal to and intersects with the flat surface of the insulating substrate 7. The insulating rib portions lib and lie extending in the direction are used to suppress the plating of the tin or silver on the terminals 10 and 1 between the adjacent terminals 10 and 10 by the insulating rib portions nb and nc. Metal migration or transfer (tin whiskers and silver migration) 10 it is difficult to produce a short circuit 10, the reliability is improved terminal '. Further, the rib portions 1 lb and 1 lc are formed by filling one of the resin knives of the holding member 11 with the synthetic resin, so that when the insulating substrate 7 is inserted into the holding member made of synthetic resin, It is easy to form the above-described ridge portions 11b and 11C by using one of the knives of the resin, and thus the productivity is excellent. Further, the ribs lie and lie of the present invention are not limited to the above-described embodiment formed by the enthalpy of the holding member 11, and for example, insulating properties may be applied to the flat surface of the insulating substrate 7. Next, the adhesive is formed in a direction crossing the flat surface of the insulating substrate 7 as a ridge portion. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a variable resistor of the present invention. Fig. 2 is a view showing the insulating substrate and the holding member of the variable resistor of the present invention. Figure 3 is a cross-sectional view taken along line 3-3 of Figure 2 of the present invention. Figure 4 is a cross-sectional view taken along line 4-4 of the second aspect of the present invention. Fig. 5 is a front view showing an insulating substrate to which the terminals of the variable resistor of the present invention are fixed. 109644.doc -16- 1301624 Fig. 6 is a rear view showing an insulating substrate to which the terminals of the variable resistor of the present invention are fixed. Figure 7 is a cross-sectional view taken along line 7-7 of Figure 5 of the present invention. Fig. 8 is a front view showing an insulating substrate of the variable resistor of the present invention. Figure 9 is a cross-sectional view showing a prior variable resistor. [Main component symbol description]
1 操作軸 la 操作部 lb 軸部 lc 驅動部 2 軸承 2a 基部 2b 筒狀部 3 驅動體 3a 基板部 3b 擋止部 3c 非圓形孔 3d 圓弧狀凸部 4 板彈簧 5 滑動件承塊 5a 圓形孔 5b 銷座 6 滑動件 6a 基部 109644.doc -17- 1301624 6b 7 7a 7b 7c 7d 接點部 絕緣基板 貫通孔 安裝孔 槽部 槽部 8 電阻體 8a 引線部 8 b 電才虽部 9 集電體 9a 引線部 9b 電極部 10 端子 10a 孔眼部1 Operating shaft la Operating part lb Shaft part lc Drive part 2 Bearing 2a Base part 2b Cylindrical part 3 Driving body 3a Substrate part 3b Stopping part 3c Non-circular hole 3d Arc-shaped convex part 4 Leaf spring 5 Slider block 5a Round hole 5b Pin holder 6 Slider 6a Base portion 109644.doc -17- 1301624 6b 7 7a 7b 7c 7d Contact portion Insulation substrate through hole Mounting hole groove portion groove portion 8 Resistor body 8a Lead portion 8 b Electrical component only Current collector 9a Lead portion 9b Electrode portion 10 Terminal 10a Eyelet portion
11 11a lib 11c lid lie Ilf 12 13 保持構件 第1開口部 突條部 突條部 貫通孔 第2開口部 突壁部 蓋 鉚釘 109644.doc -18-11 11a lib 11c lid lie Ilf 12 13 Holding member First opening portion Projection portion Projection portion Through hole Second opening portion Projecting wall cover Rivet 109644.doc -18-