TW569245B

TW569245B - Variable resistor

Info

Publication number: TW569245B
Application number: TW091120642A
Authority: TW
Inventors: Seishi Morigami; Hirotake Okunishi
Original assignee: Murata Manufacturing Co
Priority date: 2001-09-28
Filing date: 2002-09-10
Publication date: 2004-01-01
Also published as: KR20030027828A; CN100421191C; KR100485047B1; CN1411005A

Abstract

The object of the invention is to provide a variable resistor not affected by resin powder produced between a substrate and a rotating shaft. To achieve the object, the variable resistor is constituted so that its resistance value may be adjusted by sliding the contact pieces 35a and 35b of a slider 35 on a collector and a resistor concentrically provided on the surface of the substrate 10. In the center hole 11a of the substrate 10, a recessed section 11b having a stepped surface 11c is formed, and, on the rotating shaft 30, a stepped surface 33 is formed correspondingly to the stepped surface 11c of the recessed section 11b. The stepped surfaces 11c and 33 are brought into contact with each other. When the rotating shaft 30 is rotated, the resin powder is generated by frictional. However, the resin powder is not scattered on the surface of the substrate 10.

Description

569245 . A7 厂 —___B7___ 五、發明說明（丨）〔技術領域〕本發明係有關可變電阻器，特別係有關使安裝於可旋轉的旋轉軸上的滑動元件在基板上的電阻體及集電體上的滑動，來調整電阻値的可變電阻器。〔先前技術〕習知，作爲具有滑動元件的旋轉型可變電阻器，已知有如日本專利特開2000-138109號公報所揭示者。如圖 7〜1〇所示，該可變電阻器，係在由樹脂成形品所構成的基板100，具有中心孔（軸承孔）101，並埋設有第1及第2 端子112、113。端子112、113的端部112a、113a從基板 1〇〇的側面突出，他端部112b、113b從基板1〇〇的上面露出。在基板100上，集電體104係圓環狀、電阻體105係大致圓環狀而形成於同心圓上。集電體104與端子112的他端部112b相連接，與電阻體相對向的兩端部i〇5a係透過拉出電極106而與端子113的他端部113b相連接。在基板100的中心孔（軸承孔）101，以能自由旋轉的方式組裝由樹脂成形品(具有由導電材料所構成的滑動元件 108)所構成的旋轉軸107。在該滑動元件1〇8，形成在電阻器105上滑動的接片108a、和在集電器1〇4上滑動的接片 l〇8b，按照接片108a、108b的旋轉位置來調整端子in、 113間的電阻値。而且，在基板100上安裝有由樹脂成形品所構成的蓋子109。如圖11所示，在該蓋子109上，形成卡合在基板 100的背面緣部的卡合爪109a。即，在使用如圖12所示的 —____3_____ 張尺度適用中國國家標準（CNS)A4規格（210 X 297公 (請先閱讀背面之注意事項再填寫本頁)569245. A7 Factory —___ B7___ 5. Description of the Invention (丨) [Technical Field] The present invention relates to a variable resistor, and in particular, to a resistor and a current collector for a sliding element mounted on a rotatable rotating shaft on a substrate. Slide the body to adjust the resistance of the variable resistor. [Prior Art] Conventionally, as a rotary variable resistor having a sliding element, it is known as disclosed in Japanese Patent Laid-Open No. 2000-138109. As shown in Figs. 7 to 10, the variable resistor is attached to a base plate 100 made of a resin molded product, has a center hole (bearing hole) 101, and has first and second terminals 112 and 113 embedded therein. End portions 112a and 113a of the terminals 112 and 113 protrude from the side surface of the substrate 100, and other end portions 112b and 113b thereof are exposed from the upper surface of the substrate 100. On the substrate 100, the current collector 104 is formed in a circular shape, and the resistor 105 is formed in a substantially circular shape on a concentric circle. The current collector 104 is connected to the other end portion 112b of the terminal 112, and both end portions 105a opposite to the resistor body are connected to the other end portion 113b of the terminal 113 through the pull-out electrode 106. In the center hole (bearing hole) 101 of the substrate 100, a rotation shaft 107 composed of a resin molded product (having a sliding element 108 made of a conductive material) is rotatably assembled. On this sliding element 108, a tab 108a sliding on the resistor 105 and a tab 108b sliding on the current collector 104 are formed, and the terminals in, 108 are adjusted in accordance with the rotation positions of the tabs 108a and 108b. The resistance between 113 値. A cover 109 made of a resin molded product is mounted on the substrate 100. As shown in FIG. 11, an engaging claw 109a is formed on the cover 109 to be engaged with the edge of the back surface of the substrate 100. That is, when using the —____ 3_____ scale shown in Figure 12, the Chinese National Standard (CNS) A4 specification is applicable (210 X 297 males (please read the precautions on the back before filling this page)

569245 A7 ___ B7_____ 五、發明說明（> ) 模具121、122來進行樹脂成形蓋子109時，卡合爪109a 係藉由模具121的銷部121a來形成，而由銷部121a的拔出痕跡來形成開口 109b。在圖7 (a)圖示有6個開口 109a 〇〔發明所欲解決之技術問題〕然而，在如圖7〜10所示的可變電阻器中，在旋轉軸 107的中心孔l〇7a中***圖中未表示的軸，藉由該軸來對旋轉軸107施以旋轉力。可變電阻器中旋轉軸的旋轉數可達數百萬次。旋轉軸107的凸緣部107b與基板100的表面相滑動抵接（圖8中符號A所表示的部位），會產生樹脂粉末。所產生的樹脂粉末會附著到附近的集電體104及電阻體105上，因而發生引起接片l〇8a與108b的接觸障礙、且使旋轉壽命惡化等問題點。如圖7〜12所示，由於不可避免地要在銷部121a拔出的痕跡(用以形成卡合爪109a)形成開口 109b，所以灰塵等微細異物就容易從該開口 109b進入蓋子109的內部，因而發生滑動元件108的接觸障礙或短路、旋轉壽命惡化等問題點。而且，在基板100上安裝蓋子109時，蓋子109會有不規則傾斜之虞，例如，蓋子109沿如圖1〇所示的箭頭Y 方向傾斜時，則蓋子109的頂部會對滑動元件1〇8的接片 l〇8a推壓，而導致接片108&變形之問題點。進而，在圖13中，如上述般，由於在可變電阻器中，旋轉軸107的旋轉數可達數百萬次，所以就要求旋轉軸 __—_4___________ 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） --- I I I — I I I I--I .1 I (請先閱讀背面之注意事項再填寫本頁) · ·% 569245 A7 --____B7____ 五、發明說明（，） 107與承受其之軸承孔101，對軸的偏心或偏向有足夠的強度。即，較佳係軸承101的有效徑部分C儘量的大、且旋轉軸107的壁厚B儘量的厚。因此，在習知的可變電阻器中，爲了確保軸承孔101 的有效徑部分C的必要量，就需要基板100具有一定的厚度，這樣，就很難實現薄型化。而且，軸的大型化，雖然對其自身的抗旋轉斷裂強度可獲得提高，但爲確保旋轉軸 107的壁厚b具有既定量的厚度，若使軸（中心孔l〇7a) 大型化，則使可變電阻器自身亦大徑化。這與電子元件的小型化的要求背道而馳，使小型化的實現變得困難。換言之，若爲了使基板100薄型化，而使有效徑部分 C變小，或爲了使軸大徑化而使壁厚B變薄，則會有導致軸承部分的強度下降、且易於磨損等問題點。進而，如圖7〜9所不’集電體104係由含銀等良導電材料之糊料經塗敷、燒成而形成在基板1〇〇上，並與第1 端子112的他端部112b具有既定的物理接合強度。但是，這種接合屬於金屬材料(端子112)與糊料的燒結物(集電體 104)之異種物體間的接合，未必能夠獲得足夠的強度。即 ’對端子進行切斷或彎曲加工時的負載、或由於基板1〇〇與集電體104之間的熱膨脹係數的差而產生的應力，會導致前述接合的剝落，且對作爲電子元件的可靠性會有問題點。而且，由於銀的硫化亦會有使接觸電阻增大之品質上的問題點。而且，由於係在基板100上將糊料予以塗敷、燒結而 --- 5 本紙張尺度適用中國國家標準（CNS)A4一規格（210 X 297公楚) --- (請先閱讀背面之注意事項再填寫本頁)569245 A7 ___ B7_____ 5. Description of the invention (&); When the molds 121 and 122 are used to mold the resin cover 109, the engaging claws 109a are formed by the pin 121a of the mold 121, and the traces of the pin 121a are pulled out. An opening 109b is formed. FIG. 7 (a) shows six openings 109a. [Technical problem to be solved by the invention] However, in the variable resistor shown in FIGS. 7 to 10, the center hole 107a of the rotating shaft 107 A shaft (not shown) is inserted in the middle, and a rotating force is applied to the rotating shaft 107 by the shaft. The rotating shaft of a variable resistor can rotate millions of times. The flange portion 107b of the rotation shaft 107 is in sliding contact with the surface of the substrate 100 (the portion indicated by the symbol A in FIG. 8), and resin powder is generated. The generated resin powder adheres to the current collector 104 and the resistor 105 in the vicinity, thereby causing problems such as contact failure of the tabs 108a and 108b and deterioration of the rotation life. As shown in FIGS. 7 to 12, the traces (for forming the engagement claws 109 a) inevitably formed on the pin portion 121 a form the opening 109 b, so fine foreign objects such as dust can easily enter the inside of the cover 109 through the opening 109 b. Therefore, problems such as a contact failure or a short circuit of the sliding element 108, and deterioration of the rotation life occur. In addition, when the cover 109 is mounted on the substrate 100, the cover 109 may be tilted irregularly. For example, when the cover 109 is tilted in the direction of the arrow Y shown in FIG. The tab 108 of 8 is pushed, which causes the problem of the tab 108 & deformation. Further, in FIG. 13, as described above, since the rotating shaft 107 can rotate millions of times in the variable resistor, the rotating shaft is required ____4___________ This paper standard is applicable to the Chinese National Standard (CNS ) A4 specification (210 X 297 mm) --- III-III I--I .1 I (Please read the notes on the back before filling this page) · ·% 569245 A7 --____ B7____ V. Description of the invention (, ) 107 and bearing hole 101 receiving it have sufficient strength to the eccentricity or deflection of the shaft. That is, the effective diameter portion C of the bearing 101 is preferably as large as possible, and the wall thickness B of the rotating shaft 107 is preferably as large as possible. Therefore, in the conventional variable resistor, in order to ensure a necessary amount of the effective diameter portion C of the bearing hole 101, it is necessary to have a certain thickness of the substrate 100, so that it is difficult to achieve a reduction in thickness. In addition, although the enlargement of the shaft can increase its own anti-rotation fracture strength, in order to ensure that the wall thickness b of the rotating shaft 107 has a predetermined thickness, if the shaft (center hole 107a) is made larger, Increase the diameter of the variable resistor itself. This runs counter to the demand for miniaturization of electronic components, making it difficult to achieve miniaturization. In other words, if the effective diameter portion C is reduced to reduce the thickness of the substrate 100, or if the wall thickness B is reduced to increase the diameter of the shaft, the strength of the bearing portion may be reduced, and problems such as wear may occur. . Further, as shown in FIGS. 7 to 9, the current collector 104 is formed on the substrate 100 by coating and firing a paste containing a good conductive material such as silver, and is formed on the other end portion of the first terminal 112. 112b has a predetermined physical bonding strength. However, such joining is a joining between a metal material (terminal 112) and a dissimilar object of a sintered material of the paste (current collector 104), and it is not always possible to obtain sufficient strength. That is, 'the load when the terminal is cut or bent, or the stress caused by the difference in the thermal expansion coefficient between the substrate 100 and the current collector 104 will cause the aforementioned joint to peel off, and the There are problems with reliability. Furthermore, due to the vulcanization of silver, there is a problem in that the quality of the contact resistance is increased. In addition, because the paste is coated and sintered on the substrate 100 --- 5 This paper size applies the Chinese National Standard (CNS) A4 (210 X 297 cm) --- (Please read the (Please fill in this page again)

569245 A7 ___B7 五、發明說明（4 ) 形成集電體104，所以還會使設備與製程增加，導致成本上升。鑒於上述問題，本發明的目的在於，提供一種可變電阻器，能夠避免在分別由樹脂材料所構成的基板與旋轉軸之間產生的樹脂粉末的不良影響。本發明的目的還在於，提供一種可變電阻器，對於蓋子不形成不必要的貫通可變電阻器內部的開口部，故能防止微細異物的侵入。本發明的目的還在於，提供一種可變電阻器，在對基板進行蓋子的組裝時，能夠避免內部元件的滑動元件的變形。本發明的目的還在於，提供一種可變電阻器，可強化旋轉軸的軸承部分，並可提高耐久性，同時可實現基板的薄型化、和旋轉軸的大徑化（旋轉軸的薄壁化）。本發明的目的還在於，提供一種可變電阻器，使端子與集電體的連接可靠性高、且能降低成本。〔解決問題之技術手段及作用〕爲了達到上述目的，本發明的可變電阻器，係在由樹脂材料所構成的基板上，將分別與端子電氣連接的電阻體及集電體設置於同心圓上，並且，將安裝有滑動元件且由樹脂材料構成的旋轉軸，以使該滑動元件能在電阻體及集電體上滑動的方式來安裝於前述基板，其特徵在於·· 在前述基板形成用來將前述旋轉軸組裝成旋轉自如的中心孔，並且，在前述基板形成凹部，該凹部係在與該中 _________6 _____ 本紙張尺度適用中國國家標準（CNS)A4規格（21〇 χ 297公釐） (請先閱讀背面之注意事項再填寫本頁)569245 A7 ___B7 V. Description of the invention (4) The current collector 104 is formed, so the equipment and process will be increased, which will increase the cost. In view of the above-mentioned problems, an object of the present invention is to provide a variable resistor capable of avoiding adverse effects of resin powder generated between a substrate made of a resin material and a rotating shaft. Another object of the present invention is to provide a variable resistor which prevents unnecessary openings through the inside of the variable resistor for the cover, so that the intrusion of fine foreign matters can be prevented. Another object of the present invention is to provide a variable resistor capable of preventing deformation of a sliding element of an internal element when assembling a cover to a substrate. Another object of the present invention is to provide a variable resistor that can strengthen the bearing portion of a rotating shaft and can improve durability while reducing the thickness of the substrate and increasing the diameter of the rotating shaft (thinning the thickness of the rotating shaft). ). It is also an object of the present invention to provide a variable resistor which makes the connection between the terminal and the current collector highly reliable and can reduce the cost. [Technical means and functions to solve the problem] In order to achieve the above-mentioned object, the variable resistor of the present invention is provided on a substrate made of a resin material, and a resistor and a current collector electrically connected to the terminals are provided in concentric circles. Furthermore, a rotating shaft made of a resin material on which a sliding element is mounted is mounted on the substrate so that the sliding element can slide on the resistor and the current collector, and is characterized in that: ... is formed on the substrate It is used to assemble the aforementioned rotating shaft into a freely rotatable center hole, and a recess is formed in the aforementioned substrate, and the recess is connected with the _________6 _____ This paper size applies the Chinese National Standard (CNS) A4 specification (21〇χ297 Li) (Please read the notes on the back before filling this page)

569245 A7 _____B7___ 五、發明說明（5 ) 心孔呈同心的圓上以梯級面與該中心孔連接；在前述旋轉軸，形成與前述凹部的梯級面對向的梯級面；則述旋轉軸的梯級面係與前述凹部的梯級面相互抵接 0 在本發明的可變電阻器中，分別由樹脂材料所構成的基板與旋轉軸，係藉由在基板中心孔上形成的凹部之梯級面與旋轉軸上形成的梯級面相抵接，旋轉軸在該抵接狀態下旋轉。在相互抵接的梯級面之間雖然會產生樹脂粉末，但g亥產生場所係於基板中心孔的內周面，樹脂粉末不會飛散於基板的表面。所以，在基板表面設置的集電體與電阻體上就不會附著樹脂粉末，從而可防止與滑動元件的接觸障礙及旋轉壽命的惡化。特別地’較佳係把前述滑動元件安裝在由旋轉軸外周面突出的凸緣部，並且在該凸緣部與基板的表面之間形成間隙。這樣能夠確實防止在基板表面樹脂粉末的發生。而且’前述中心孔還可以形成突出於基板背面的圓環狀突部中，從而使***旋轉軸的軸的軸承部分的強度得到補強。進而，、較佳係，圓環狀突部能夠嵌合在印刷基板的孔部。在組裝時能夠使可變電阻器的高度降低，並使圓環狀突部能夠以印刷基板來支撐。同時，、可獲得可變電阻器相對於印刷基板的定位作用。本發明中的可變電阻器，具有以下特徵：前述基板由前述樹脂材料所構成的蓋子所覆蓋，在前述基板的側面形 _ 一―_ _ 7__ 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公餐） (請先閱讀背面之注意事項再填寫本頁) 裝 569245 A7 _____B7___ 五、發明說明（匕）成第1卡合部，在設置於前述蓋子的側部的突片，以在前述蓋子的突片附近不存在貫通可變電阻器內部之開口部的方式，來形成與前述基板的第1卡合部相卡合的蓋子的第 2卡合部。具體而言，本說明書中所指的可變電阻器的內部，係指基板表面與覆蓋該基板的蓋子之間所形成的空間。本發明的可變電阻器中，由於在蓋子的突片形成的第 2卡合部，在突片附近不存在貫通可變電阻器內部的開口部，所以能夠確保蓋子內部的防塵性，並防止微小異物的侵入。特別地’藉由將第2卡合部作爲沿著突片厚度方向形成的貫通孔，使在蓋子的樹脂成形時，設於模具的銷部之拔出痕跡不會殘留在突片附近。而且，前述貫通孔係在樹脂成形前述蓋子時，藉由設置能從一方的模具側壁部的側方進退自如的可動構件而可容易地形成。本發明的可變電阻器還具有如下特徵：前述基板係以由前述樹脂材料所構成的蓋子所覆蓋，在前述基板的側面形成第1卡合部，在設置於前述蓋子的側部的突片，形成與前述第1卡合部相卡合的第2卡合部，作爲沿該突片厚度方向形成的貫通孔，前述貫通孔係在進行樹脂成形前述蓋子時，藉由從一方的模具側壁部的側方進退自如的可動構件來形成者。該可變電阻器的作用與上述本發明的可變電阻器中說明的作用基本上相同。 -------- 8_______ 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁)569245 A7 _____B7___ V. Description of the Invention (5) A circle with concentric holes is connected to the center hole by a step surface; on the rotation axis, a step surface facing the step of the recess is formed; then the steps of the rotation axis are described The surface is in contact with the stepped surface of the recessed portion. In the variable resistor of the present invention, the substrate and the rotating shaft made of a resin material are respectively formed by the stepped surface and rotation of the recessed portion formed in the center hole of the substrate. The step surfaces formed on the shaft are in contact with each other, and the rotary shaft is rotated in this abutting state. Although the resin powder is generated between the step surfaces that are in contact with each other, the ghail generation site is tied to the inner peripheral surface of the center hole of the substrate, and the resin powder does not scatter on the surface of the substrate. Therefore, the resin powder is not adhered to the current collector and the resistor provided on the substrate surface, so that it is possible to prevent the contact with the sliding element and the deterioration of the rotation life. In particular, it is preferable that the aforementioned sliding element is mounted on a flange portion protruding from the outer peripheral surface of the rotation shaft, and a gap is formed between the flange portion and the surface of the substrate. This can reliably prevent the occurrence of resin powder on the substrate surface. In addition, the aforementioned central hole may be formed in a ring-shaped protrusion protruding from the back surface of the substrate, so that the strength of the bearing portion of the shaft inserted into the rotary shaft is reinforced. Furthermore, preferably, the annular projection can be fitted into a hole portion of the printed circuit board. The height of the variable resistor can be reduced during assembly, and the annular projection can be supported by a printed circuit board. At the same time, the positioning effect of the variable resistor with respect to the printed circuit board can be obtained. The variable resistor in the present invention has the following characteristics: the aforementioned substrate is covered by a cover made of the aforementioned resin material, and is shaped on the side of the aforementioned substrate _ 1 __ _ 7__ This paper size applies to China National Standard (CNS) A4 (210 X 297 meals) (Please read the precautions on the back before filling in this page) Install 569245 A7 _____B7___ 5. Description of the invention (dagger) Form the first engaging part, the protruding piece on the side of the cover, The second engaging portion of the lid which is engaged with the first engaging portion of the substrate is formed so that there is no opening portion penetrating the inside of the variable resistor near the protruding piece of the lid. Specifically, the inside of the variable resistor referred to in this specification refers to a space formed between a surface of a substrate and a cover covering the substrate. In the variable resistor of the present invention, since the second engaging portion formed on the protruding piece of the cover does not have an opening portion penetrating the inside of the variable resistor near the protruding piece, it is possible to ensure dustproofness inside the cover and prevent Invasion of tiny foreign bodies. In particular, by using the second engaging portion as a through-hole formed in the thickness direction of the protruding piece, when the resin of the lid is molded, the pull-out trace of the pin portion provided in the mold does not remain near the protruding piece. In addition, the through-holes can be easily formed by providing a movable member that can move forward and backward from the side of one side wall portion of the mold when the lid is molded by the resin. The variable resistor of the present invention is also characterized in that the substrate is covered with a cover made of the resin material, a first engaging portion is formed on a side surface of the substrate, and a tab is provided on a side portion of the cover. A second engaging portion that is engaged with the first engaging portion is formed as a through hole formed in the thickness direction of the protruding piece, and the through hole is formed from one side wall of the mold during resin molding of the cover. The side of the part is formed by a movable member that can move forward and backward freely. The function of the variable resistor is substantially the same as that described in the variable resistor of the present invention described above. -------- 8_______ This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page)

569245 A7 ___B7__ 五、發明說明（1 ) 本發明中的可變電阻器，係在由樹脂材料所構成的基板上’將分別與端子電氣連接的電阻體及位於該電阻體內側之集電體設置於同心圓上，並且，將安裝有滑動元件的旋轉軸’以使該滑動元件之第1接片在電阻體上、該滑動元件之第2接片在集電體上分別能滑動的方式來安裝於前述基板，其特徵在於：前述基板係由前述樹脂材料所構成的蓋子所覆蓋；在前述蓋子的側部形成位於前述基板側面的第i及第 2突片，在第1突片形成與在前述基板側面形成的第1卡合部相卡合的第2卡合部，而在第2突片不形成卡合部；前述蓋子的第2突片，係設置成比蓋子的第i突片更遠離在組裝初期設定時的前述滑動元件的第1接片的位置 0 在本發明的可變電阻器中，將蓋子對基板推壓，使形成於第1突片的第2卡合部與在基板側面形成的第1卡合部相卡合。該卡合需要一定的卡合力。另一方面，第2突片則不需要特別的卡合力便可置於基板的側面。此時，如果假定蓋子相對於基板形成傾斜，由於不需要卡合力的第 2突片會首先以沈下的狀態而傾斜，所以如果事先將第2 突片設置於從位於外側的第1接片離開的位置，則蓋子就不會使第1接片變形。而且，由於第2接片位於內側，所以即使蓋子有若干傾斜，也不會發生變形。在本發明的可變電阻器中，在前述第1突片上形成的第2卡合部，如果以在第1突片的附近不存在貫通可變電 _ 9__ (請先閱讀背面之注意事項再填寫本頁)569245 A7 ___B7__ 5. Description of the invention (1) The variable resistor in the present invention is provided on a substrate made of a resin material, and a resistor body to be electrically connected to the terminal and a current collector located inside the resistor body are provided. On the concentric circle, the rotation axis of the sliding element is mounted so that the first tab of the sliding element is on the resistor, and the second tab of the sliding element is on the current collector. The substrate is mounted on the substrate, wherein the substrate is covered with a cover made of the resin material, and the i-th and second protrusions on the side of the substrate are formed on the side of the cover, and the first protrusions are formed on the side of the substrate. The second engaging portion engaged with the first engaging portion formed on the side surface of the substrate, and the engaging portion is not formed on the second protruding piece; the second protruding piece of the cover is provided more than the i-th protruding portion of the cover. The sheet is further away from the position of the first tab of the sliding element at the time of initial assembly. In the variable resistor of the present invention, the lid is pressed against the substrate to form the second engaging portion of the first protruding piece. With the first card formed on the side of the substrate Portion engages. This engagement requires a certain engagement force. On the other hand, the second tab can be placed on the side of the substrate without requiring a special engaging force. At this time, if it is assumed that the lid is inclined with respect to the substrate, the second tab that does not require an engaging force will be tilted first in a sinking state. Therefore, if the second tab is set in advance from the first tab on the outside, Position, the cover will not deform the first blade. Furthermore, since the second tab is located on the inside, even if the lid is slightly inclined, it will not be deformed. In the variable resistor of the present invention, if the second engaging portion formed on the first tab is not connected to the variable power in the vicinity of the first tab _ 9__ (Please read the precautions on the back before (Fill in this page)

本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 569245 A7 ______B7___ 五、發明說明（父）阻器的內部的開口部的方式來形成，則與上述第1、第2 發明中的可變電阻器同樣，能夠防止微小異物的侵入。而且，前述第2卡合部可爲沿前述第1突片之厚度方向形成的貫通孔，該貫通孔係在進行樹脂成形前述蓋子時，藉由設置從一方的模具側壁部的側方進退自如的可動構件而可容易地形成。本發明中的可變電阻器，還具有以下特徵：在前述基板的大致中央形成前述旋轉軸能以旋轉自如的方式組裝的軸承孔，並且，在基板的背面設置突出於與前述軸承孔呈同心的圓上的圓環狀突部。在本發明的可變電阻器中，還具有以下特徵：藉由插入在前述旋轉軸的中心孔的軸，來使旋轉軸與滑動元件一體旋轉，在前述基板的背面設置突出於與前述軸承孔呈同心的圓上的圓環狀突部，把該突部的內周面作爲前述軸的軸承來作用。在第1與第2發明的可變電阻器中，爲了使旋轉軸旋轉而***旋轉軸的軸之旋轉，不僅被旋轉軸的中心孔所支撐，還被設置在基板背面的圓環狀突部所支撐，所以能夠增大軸的軸承部分的強度。因此，基板的薄型化、軸（旋轉軸）的薄壁化等就成爲可能。特別地，較佳係使設置在基板背面的圓環狀突部與旋轉軸的中心孔具有相同的內徑。進而，較佳係圓環狀突部能夠嵌合在安裝有可變電阻器的印刷基板的孔部。隨著基板薄型化而可達成組裝時高度的降低，並且圓環狀突部能 10_ 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) i i II I I I I 訂-! I I I . 569245 A7 _____ Β7______ 五、發明說明（1 ) 夠以印刷基板來支撐。而且，亦可達成可變電阻器對印刷基板的定位作用。本發明中的可變電阻器，還具有以下特徵··前述端子係由第1及第2端子構成，前述集電體係由與前述第1端子一體形成的圓環狀或大致圓環狀的金屬材料材料所構成，並露出於前述基板的表面，按照前述滑動元件的旋轉位置來變更前述集電體及電阻體的總面長度，藉此，來調整前述第1端子與第2端子間的電阻値。在本發明的可變電阻器中，第1端子與集電體係由一個金屬材料所構成，不存在接合部分。因此，即使端子受到負載的作用，或集電體受到熱應力的作用，也不會發生第1端子與集電體之間的電氣特性惡化或動作不良、不能動作等功能障礙。而且，由於集電體係與端子一體處理，可以進行金屬材料的切斷和樹脂成形品（基板）的***，沒有必要以糊料的塗敷、燒結的製程來形成。特別地’較佳係在前述集電體上設置導電性潤滑層。當集電體爲金屬材料時，因滑動元件的滑動會加快磨損，若設置了潤滑層，則能夠使該磨損降低、延長使用壽命。而且’如果該導電性潤滑層使用與前述電阻體同樣的材料 ’則可以採用與電阻體同樣的製程進行塗敷（例如網版印刷）。還有’較佳係前述導電性潤滑層的寬度尺寸等於或小於集電體的寬度尺寸。藉此，潤滑層僅在集電體上形成，就不會受到由於金屬材料（集電體）與樹脂材料（基板） ^紙張尺度適用中國國家標準（CNS)A4^i^1() χ -- (請先聞讀背面之注意事項再填寫本頁)This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 569245 A7 ______B7___ V. Description of the invention (parent) The way of the opening inside the resistor is formed with the above-mentioned first and second inventions In the same way, the varistor can prevent the intrusion of minute foreign matter. In addition, the second engaging portion may be a through hole formed in a thickness direction of the first protruding piece, and the through hole is provided to be freely advanced from the side of one side wall portion of the mold during resin molding of the lid. Can be easily formed. The variable resistor according to the present invention further has a feature that a bearing hole capable of rotatably assembling the rotation shaft is formed at a substantially center of the substrate, and a back surface of the substrate is provided to protrude concentrically with the bearing hole. Ring-shaped protrusions on the circle. The varistor of the present invention further has a feature that the rotation shaft and the sliding element are rotated integrally by a shaft inserted into a center hole of the rotation shaft, and a back surface of the substrate is provided to protrude from the bearing hole. An annular projection on a concentric circle uses the inner peripheral surface of the projection as a bearing for the shaft. In the variable resistor of the first and second inventions, the rotation of the shaft inserted into the rotating shaft for rotating the rotating shaft is supported not only by the center hole of the rotating shaft, but also by an annular protrusion provided on the back surface of the substrate. It is supported, so that the strength of the bearing portion of the shaft can be increased. Therefore, it is possible to reduce the thickness of the substrate and the thickness of the shaft (rotary shaft). In particular, it is preferable that the annular projection provided on the back surface of the substrate and the center hole of the rotation shaft have the same inner diameter. Furthermore, it is preferable that the annular projection can be fitted into a hole portion of a printed circuit board on which the variable resistor is mounted. With the thinning of the substrate, the height can be reduced during assembly, and the ring-shaped protrusion can be 10_ This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back first (Fill in this page) ii II IIII Order-! III. 569245 A7 _____ Β7 ______ 5. Description of the invention (1) Enough to be supported by a printed circuit board. Moreover, the positioning effect of the variable resistor on the printed circuit board can also be achieved. The variable resistor in the present invention further has the following characteristics: the terminal system is composed of first and second terminals, and the current collection system is formed by a ring-shaped or substantially ring-shaped metal integrally formed with the first terminal. Made of materials and exposed on the surface of the substrate, and changing the total surface length of the current collector and resistor in accordance with the rotation position of the sliding element, thereby adjusting the resistance between the first terminal and the second terminal value. In the variable resistor of the present invention, the first terminal and the current collecting system are made of a single metal material, and there is no joint portion. Therefore, even if the terminal is subjected to a load or the current collector is subjected to thermal stress, there will be no malfunction such as deterioration of the electrical characteristics between the first terminal and the current collector, poor operation, or inability to operate. In addition, since the current collecting system and the terminals are integrally processed, cutting of the metal material and insertion of the resin molded product (substrate) can be performed, and it is not necessary to form it by a process of coating and sintering the paste. In particular, it is preferable that a conductive lubricant layer is provided on the current collector. When the current collector is a metal material, the sliding of the sliding element will accelerate the wear. If a lubricating layer is provided, the wear can be reduced and the service life can be extended. Furthermore, if the conductive lubricating layer is made of the same material as the resistor, it can be applied by the same process as the resistor (for example, screen printing). It is also preferable that the width dimension of the conductive lubricating layer is equal to or smaller than the width dimension of the current collector. As a result, the lubricating layer is formed only on the current collector, and it will not be affected by the metal material (current collector) and the resin material (substrate). ^ The paper size applies the Chinese National Standard (CNS) A4 ^ i ^ 1 () χ- -(Please read the notes on the back before filling this page)

569245 A7 __B7 _ 五、發明說明（ί° ) 之間熱膨脹係數的差所引起的應力，故能防止潤滑層發生裂紋。〔發明之實施形態〕以下，參照圖式對本發明之可變電阻器的實施形態進行說明。首先，參照圖1〜4，對本發明之可變電阻器的第1實施形態之構成加以說明。該可變電阻器，係由樹脂成形品所構成的基板10、由樹脂成形品所構成的蓋子20、以及具有滑動元件35且由樹脂成形品所構成的旋轉軸30所構成。在基板10的背面側突設突部11，形成中心孔11a，並埋設端子12、13。端子12的端部12a從基板1〇的側面突出，中央部係作爲圓環狀的集電體12b而露出於基板10的表面。端子13的端部13a從基板10的側面突出，他端部i3b露出於基板10 的表面。如圖4所示，前述端子12、13係由長尺寸的環狀材料 40衝切後形成既定形狀者，***成形模具（圖中未顯示），成形基板10。在該樹脂成形後，在基板10的表面上，藉由導電性樹脂材料的塗敷而形成大致圓環狀的電阻體15 ，電阻體15的相互對向的兩端部15a與前述端子13的他端部13b相連接。在集電體121)上設置有導電性潤滑層14 。該潤滑層14以與電阻體15的樹脂成分近似的樹脂作爲其主要成分。或是，潤滑層14係採用與電阻體15同樣的導電性樹脂材料，並與電阻體15同時塗敷。 · 度適用中關家#?χ i I I I I I 1 I I I I · I I (請先閱讀背面之注意事項再填寫本頁) 訂· -·% 569245 A7 _____B7___ 五、發明說明（丨丨）集電體12b (潤滑層14)與電阻體15設置於基板1〇的表面的同心圓上，集電體12b位於電阻體15的內側。旋轉軸30具有中心孔31，在凸緣部32的周圍安裝有滑動元件35，並以能旋轉自如的方式組裝於基板1〇的中心孔11a。滑動元件35，係由導電性金屬材料所構成，並且具有：在電阻體15上於彈性壓接狀態下滑動的刷狀的第 1接片35a、以及在集電體12b (潤滑層14)上於彈性壓接狀態下滑動的刷狀的第1二接片35b。進而，在前述基板10的中心孔11a的上半部分形成凹部lib。該基板10的凹部lib，係與基板10的中心孔lla 位於同心圓上，且透過梯級面lie而與中心孔Ua連續。如圖1 (A)所示，旋轉軸30的中心孔31，形成圓形孔的一部分被埋設的形狀，旋轉軸30的中心孔31與基板10的中心孔lla具有相同的內徑。如圖2所示，當旋轉軸30安裝在基板10的中心孔31 時，旋轉軸30的梯級面33與基板10的凹部lib梯級面 11c成抵接狀態。旋轉軸30的凸緣部32與基板1〇的表面之間形成間隙C。蓋子20，具有用以將旋轉軸30上部定位的中心孔21 ，且以所謂的咬接(snap in)方式安裝在基板10上。詳言之，如圖6所示，在基板10的側面，形成上側傾斜的卡合用突部10a，在蓋子20的側部設置的第1突片22處，沿突片22的厚度方向形成與突部10a相卡合的貫通孔20a，貫通孔20a以晈接方式卡合在突部l〇a。進而，在蓋子20， ____J3___ 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁)569245 A7 __B7 _ V. The stress caused by the difference in thermal expansion coefficient between the invention description (ί °), so it can prevent the lubrication layer from cracking. [Embodiments of the invention] Hereinafter, embodiments of the variable resistor of the present invention will be described with reference to the drawings. First, the configuration of the first embodiment of the variable resistor according to the present invention will be described with reference to Figs. The variable resistor is composed of a substrate 10 made of a resin molded product, a cover 20 made of a resin molded product, and a rotary shaft 30 including a sliding element 35 and made of a resin molded product. A projection 11 is provided on the back side of the substrate 10 to form a center hole 11a, and the terminals 12 and 13 are embedded. An end portion 12a of the terminal 12 protrudes from a side surface of the substrate 10, and a central portion is exposed on the surface of the substrate 10 as a circular current collector 12b. The end portion 13a of the terminal 13 protrudes from the side surface of the substrate 10, and the other end portion i3b thereof is exposed on the surface of the substrate 10. As shown in FIG. 4, the above-mentioned terminals 12 and 13 are formed by punching a long-sized ring-shaped material 40 into a predetermined shape, and inserting them into a mold (not shown) to mold the substrate 10. After the resin is formed, a substantially annular resistor body 15 is formed on the surface of the substrate 10 by coating with a conductive resin material. The opposite end portions 15a of the resistor body 15 and the terminals 13 The other ends 13b are connected. A conductive lubricating layer 14 is provided on the current collector 121). The lubricating layer 14 has a resin similar to that of the resistor 15 as its main component. Alternatively, the lubricant layer 14 is made of the same conductive resin material as that of the resistor 15, and is applied simultaneously with the resistor 15. · Degree applies to Zhongguanjia #? Χ i IIIII 1 IIII · II (Please read the precautions on the back before filling this page) Order ·-·% 569245 A7 _____B7___ 5. Description of the invention (丨丨) Current collector 12b (lubrication The layer 14) and the resistor 15 are provided on a concentric circle on the surface of the substrate 10, and the current collector 12b is located inside the resistor 15. The rotation shaft 30 has a center hole 31, a slide element 35 is mounted around the flange portion 32, and is rotatably assembled in the center hole 11a of the substrate 10. The sliding element 35 is made of a conductive metal material, and includes a brush-like first tab 35a that slides on the resistor 15 in an elastic crimped state, and a current collector 12b (lubricating layer 14). The brush-like first second contact piece 35b is slid in the elastic pressure-bonding state. Further, a concave portion lib is formed in the upper half of the center hole 11a of the substrate 10. The concave portion lib of the substrate 10 is located on a concentric circle with the center hole 11a of the substrate 10, and is continuous with the center hole Ua through the step surface lie. As shown in FIG. 1 (A), the center hole 31 of the rotation shaft 30 is formed in a shape in which a part of the circular hole is buried. The center hole 31 of the rotation shaft 30 and the center hole 11a of the substrate 10 have the same inner diameter. As shown in FIG. 2, when the rotation shaft 30 is mounted in the center hole 31 of the substrate 10, the step surface 33 of the rotation shaft 30 and the recessed step 11c of the substrate 10 are in abutting state. A gap C is formed between the flange portion 32 of the rotation shaft 30 and the surface of the substrate 10. The cover 20 has a center hole 21 for positioning the upper portion of the rotation shaft 30 and is mounted on the substrate 10 in a so-called snap-in method. Specifically, as shown in FIG. 6, on the side surface of the substrate 10, an engaging protrusion portion 10 a inclined at an upper side is formed, and a first protrusion piece 22 provided on a side portion of the cover 20 is formed along the thickness direction of the protrusion piece 22. The projecting portion 10a is engaged with the through-hole 20a, and the through-hole 20a is engaged with the projecting portion 10a in a snap-fit manner. Furthermore, on the cover 20, ____J3___ This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page)

569245 κι _ Β7____ 五、發明說明（A) 形成位於基板1〇的側面l〇c的第2突片23。爲了避免與端子12、13的干擾，該第2突片23形成梳齒狀，與側面 10c僅係面接觸而並非卡合。由以上構造所構成的可變電阻器，係在圖2中虛線所示的印刷基板45的孔部46，嵌合基板10的突部11，並且，在已將端子12、13焊接於印刷基板45的平面部(land)( 圖中未顯示）的狀態下加以組裝。又，爲了使旋轉軸30及滑動元件35旋轉，在中心孔31、11a中***圖中未表示的操作軸。該軸的***部分形成與中心孔11a相卡合的形狀，藉由向左右任意方向的旋轉驅動，使旋轉軸30與滑動元件35 —體旋轉，藉由接片35a、35b相對於電阻體15及集電體12b的接觸位置的變化，來調整端子12、13之間的電阻値。然而，在本實施形態的可變電阻器中，當以軸來旋轉驅動旋轉軸時，最大的摩擦力發生在相互抵接的梯級面33 、11c。在此處生成樹脂粉末。但是，該發生場所係在中心孔11a的內周面，所以樹脂粉末不會飛散於基板表面。因此，集電體12b (潤滑層14)、電阻體15等上面就不會附著樹脂粉末，從而防止與滑動元件35的接觸障礙，以及旋轉壽命的惡化。並且，由於旋轉軸3〇的凸緣部32與基板 1〇的表面之間形成有間隙C，故能確保防止在此處樹脂粉末的發生。又，軸係由旋轉軸30的中心孔31與設於基板的圓環狀突部11的內周面（中心孔11a)所支撐，能夠使軸承部 ______14 ___ 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) I ---— — — — — 訂·！— II--線. 569245 A7 __J7__ 五、發明說明（) 分的強度增大，耐久性提高。而且’僅使突部11形成突出部分，故可以使基板10薄型化。又，由於前述圓環狀突部11係嵌合於印刷基板45的孔部46，所以在安裝時能夠達成使可變電阻器的高度降低，並能夠使突部11的強度提高。而且’亦可獲得可變電阻器相對於印刷基板的定位作用。本發明的可變電阻器並不限於前述實施形態，在其要旨的範圍內，當然可以做各種變更。下面說明本發明之可變電阻器的第2實施形態，首先參照圖14〜圖17對其構成加以說明。該可變電阻器，係由樹脂成形品所構成的基板210、由樹脂成形品所構成的蓋子220、以及具有滑動元件235 且由樹脂成形品所構成的旋轉軸230所構成。基板210具有中心孔211，並埋設有端子212、213。端子212的端部 212a從基板210的側面突出，中央部係作爲圓環狀的集電體212b而露出於基板210的表面。端子213的端部213a 從基板210的側面突出，他端部213b露出於基板210的表面。如圖17所示，前述端子212、213係由長尺寸的環狀材料240衝切成既定形狀，再***成形模具（圖中未顯示 )後，成形爲基板210。在該樹脂成形後，在基板210的表面上，藉由導電性樹脂材料的塗敷而形成大致圓環狀的電阻體215，電阻體215的相互對向的兩端部215a與前述端子213的他端部213b相連接。又，在集電體212b設置用中國國家標準（CNS)A4規格（210 X -一~ <請先閱讀背面之注意事項再填寫本頁)569245 κι Β7 ____ 5. Description of the invention (A) A second protruding piece 23 is formed on the side surface 10c of the substrate 10. In order to avoid interference with the terminals 12, 13, the second protruding piece 23 is formed in a comb-tooth shape, and is in surface contact with the side surface 10c only, and is not engaged. The variable resistor constituted by the above structure is a hole portion 46 of the printed circuit board 45 shown by a dotted line in FIG. 2, a projection 11 of the substrate 10 is fitted, and the terminals 12 and 13 are soldered to the printed substrate. 45 is assembled in a land (not shown) state. In order to rotate the rotation shaft 30 and the sliding element 35, an operation shaft (not shown) is inserted into the center holes 31, 11a. The insertion portion of the shaft is formed in a shape engaging with the center hole 11a, and the rotary shaft 30 and the sliding element 35 are rotated as a whole by rotational driving in any direction, and the contact pieces 35a and 35b are relative to the resistor 15 And the change in the contact position of the current collector 12b to adjust the resistance 値 between the terminals 12,13. However, in the varistor of this embodiment, when the rotary shaft is driven by the shaft to rotate, the maximum frictional force occurs on the step surfaces 33 and 11c which are in contact with each other. Here, a resin powder is produced. However, since the occurrence site is on the inner peripheral surface of the center hole 11a, the resin powder does not scatter on the surface of the substrate. Therefore, resin powder is not adhered to the current collector 12b (lubricating layer 14), the resistor 15, and the like, thereby preventing contact with the sliding member 35 and deterioration in rotation life. In addition, since the gap C is formed between the flange portion 32 of the rotary shaft 30 and the surface of the substrate 10, it is possible to securely prevent the occurrence of resin powder here. In addition, the shaft system is supported by the center hole 31 of the rotation shaft 30 and the inner peripheral surface (center hole 11a) of the annular projection 11 provided on the substrate, and the bearing portion ______14 ___ This paper size applies Chinese national standards ( CNS) A4 specification (210 X 297 mm) (Please read the notes on the back before filling this page) I ---— — — — — Order ·! — II-- line. 569245 A7 __J7__ 5. Description of the invention () The strength of the () points is increased, and the durability is improved. Further, since only the protruding portion 11 is formed as a protruding portion, the substrate 10 can be made thin. In addition, since the annular protrusion 11 is fitted into the hole portion 46 of the printed circuit board 45, the height of the variable resistor can be reduced during mounting, and the strength of the protrusion 11 can be improved. Moreover, the positioning effect of the variable resistor with respect to the printed circuit board can also be obtained. The variable resistor of the present invention is not limited to the foregoing embodiment, and various modifications can be made within the scope of the gist thereof. Next, a second embodiment of the variable resistor of the present invention will be described. First, its configuration will be described with reference to Figs. 14 to 17. The variable resistor is composed of a substrate 210 made of a resin molded product, a cover 220 made of a resin molded product, and a rotation shaft 230 including a sliding element 235 and made of a resin molded product. The substrate 210 has a center hole 211, and terminals 212 and 213 are embedded. An end portion 212a of the terminal 212 protrudes from a side surface of the substrate 210, and a central portion thereof is exposed on the surface of the substrate 210 as a ring-shaped current collector 212b. An end portion 213a of the terminal 213 projects from the side surface of the substrate 210, and the other end portion 213b is exposed on the surface of the substrate 210. As shown in FIG. 17, the terminals 212 and 213 are punched into a predetermined shape from a long annular material 240, and then inserted into a mold (not shown), and then formed into a substrate 210. After the resin is formed, a substantially circular resistor body 215 is formed on the surface of the substrate 210 by coating with a conductive resin material. The opposite end portions 215a of the resistor body 215 and the terminal 213 are formed. The other ends 213b are connected. In addition, the current collector 212b is installed using the Chinese National Standard (CNS) A4 specification (210 X -1 ~ < Please read the precautions on the back before filling this page)

569245 A7 ____B7____ 五、發明說明（A) 有導電性潤滑層214。該潤滑層214係以與電阻體215的樹脂成分近似的樹脂作爲其主要成分。或是，潤滑層214 亦可與電阻體215採用同樣的導電性樹脂，並同時與電阻體215塗敷。集電體212b (潤滑層214)與電阻體215係設置於基板210表面的同心圓上，集電體212b位於電阻體215的內旋轉軸230，具有中心孔231，在凸緣部232的周圍安裝有滑動元件235，並能旋轉自如的方式安裝在基板21〇的中心孔211。滑動元件235，係由導電性金屬材料所構成，並具有：在電阻體215上在彈性壓接狀態下滑動的刷狀的第1接片235a，以及在集電體212b (潤滑層214)上在彈性壓接狀態下滑動的刷狀的第2接片235b。旋轉軸230的中心孔230a，係如圖7 (A)所示般，形成圓形孔的一部分被埋設的形狀。中心孔230a中***圖中未顯示的操作軸，藉由左右任意方向的旋轉驅動，使旋轉軸230與滑動元件235 —體旋轉，藉由接片235a、235b 相對於電阻體215及集電體212b的接觸位置的變化，來調整端子212、213之間的電阻値。蓋子220，具有將旋轉軸230上部定位的中心孔221，並以咬接方式安裝在基板210。咬接方式係指藉由樹脂等的彈性使兩個卡合部強制嵌合的結合方式，與其他的結合方式如歛縫、熔合、熔接、焊接等相比，由於不需要特別的加工，所以具有組裝簡單、適合於量產、成本低等優點 ______ 16___ 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先闐讀背面之注意事項秀填寫本569245 A7 ____B7____ 5. Description of the invention (A) There is a conductive lubricating layer 214. The lubricating layer 214 is made of a resin similar to the resin composition of the resistor 215 as its main component. Alternatively, the lubricating layer 214 may be made of the same conductive resin as the resistor 215 and coated with the resistor 215 at the same time. The current collector 212b (lubricating layer 214) and the resistor 215 are disposed on a concentric circle on the surface of the substrate 210. The current collector 212b is located on the inner rotation axis 230 of the resistor 215, has a central hole 231, and surrounds the flange portion 232 A sliding element 235 is mounted and can be rotatably mounted in a central hole 211 of the substrate 21. The sliding element 235 is made of a conductive metal material, and has a brush-like first tab 235a that slides on the resistor 215 in an elastic crimping state, and a current collector 212b (lubricating layer 214). The brush-like second contact piece 235b that slides in the elastic pressure contact state. The center hole 230a of the rotation shaft 230 has a shape in which a part of the circular hole is buried, as shown in FIG. 7 (A). An operation shaft not shown in the figure is inserted into the central hole 230a, and the rotation shaft 230 and the sliding element 235 are rotated by a rotation drive in any left and right direction, and the resistors 215 and the current collector are relative to the resistor 215 and the current collector through the tabs 235a and 235b. The contact position of 212b is changed to adjust the resistance 値 between the terminals 212 and 213. The cover 220 has a center hole 221 for positioning the upper portion of the rotation shaft 230 and is mounted on the substrate 210 in a snap-fit manner. The snap-in method refers to a coupling method in which two engagement portions are forcibly fitted by the elasticity of resin or the like. Compared with other coupling methods such as caulking, fusion, welding, welding, etc., special processing is not required, so It has the advantages of simple assembly, suitable for mass production, low cost, etc. ______ 16___ This paper size is applicable to Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back first and fill in this

569245 A7 ________B7___ 五、發明說明（A ) ο 詳言之，如圖19所示’在基板210的側面形成上側傾斜的卡合用突部210a，在蓋子220的側部設置的第1突片 222處，沿突片222的厚度方向形成與突部210a相卡合的貫通孔220a，貫通孔220a以咬接方式安裝在突部210a。如圖20所示，該貫通孔220a，係使用模具251、252對蓋子220進行樹脂成形時’事先設置可從模具251的側方進退自如的可動銷構件253 ’由該銷構件253的拔出痕跡所形成。如圖16所示，卡合用突部210a，在基板210的側面上稍稍下陷的凹部21〇b的4處形成，第1突片222係對應該凹部210b且在保持以咬接方式的卡合所需的彈性狀態下形成。又，由於貫通孔係藉由從側方進退的銷構件253所形成，所以就不會在蓋子220的表面形成如圖12所示的銷構件121a的拔出痕跡的開口部109b (參照圖7 (A))。因此，就不會發生微小異物進入蓋子220內的現象而引起對滑動元件235的接觸障礙、短路，以及旋轉壽命惡化等不良情況。進而，在蓋子220，形成位於基板210側面210c的第 2突片223。爲了避免與端子212、213的干擾，該第2突片223形成梳齒狀，與側面210c僅係面接觸而並非卡合。如圖15所示，蓋子22〇的端部係藉由使梯級面225與基板 210的表面抵接而定位。又，關於基板210與蓋子220的咬接方式之卡合構造 _____17___ 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁)569245 A7 ________B7___ 5. Description of the Invention (A) ο In detail, as shown in FIG. 19, 'an upper-side inclined engagement protrusion 210a is formed on the side of the substrate 210, and a first protrusion 222 is provided on the side of the cover 220. A through hole 220a is formed along the thickness direction of the protruding piece 222 to be engaged with the protruding portion 210a, and the through hole 220a is attached to the protruding portion 210a in a snap-fit manner. As shown in FIG. 20, the through hole 220 a is formed by using the molds 251 and 252 to mold the cover 220 'in advance, a movable pin member 253 capable of advancing and retracting from the side of the mold 251 is provided in advance' and the pin member 253 is pulled out Traces formed. As shown in FIG. 16, the engaging protrusions 210 a are formed at the four recessed portions 21 b slightly recessed on the side surface of the substrate 210, and the first protruding pieces 222 correspond to the recesses 210 b and are held in a snap-fit manner. Formed in the required elastic state. In addition, since the through-hole is formed by the pin member 253 advancing and retreating from the side, the opening portion 109b of the pin member 121a as shown in FIG. 12 is not formed on the surface of the lid 220 (see FIG. 7). (A)). Therefore, there is no problem that a small foreign matter enters the inside of the cover 220, which causes troubles such as a contact failure with the sliding element 235, a short circuit, and a deterioration in rotation life. Furthermore, a second projection 223 is formed on the cover 220 on the side surface 210c of the substrate 210. In order to avoid interference with the terminals 212 and 213, the second projection 223 is formed in a comb-tooth shape, and is in surface contact with the side surface 210c instead of being engaged. As shown in FIG. 15, the end portion of the cover 22 is positioned by abutting the step surface 225 on the surface of the substrate 210. In addition, the engaging structure of the bite connection method between the substrate 210 and the cover 220 _____17___ This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page)

569245 A7 _B7___ 五、發明說明（汄） (請先閱讀背面之注意事項再填寫本頁) ，除了如圖19所示的第1例之外，還可以採用如圖21、 22所示的第2例，圖23、24所示的第3例。當然，也可以採用上述以外的構造。第2例，係在如圖21所示的第1突片222形成的淺的凹部220d、與在圖22所示的凹部210b形成的低的卡合用突部210d組合而成的卡合構造。第三例，係在如圖23所示的第1突片222上所形成的矩形膨出部220e、與在圖24 所示的凹部210b上形成的梯級面21(k組合而成的卡合構造。然而，前述滑動元件235在組裝的初期，如圖16所示，設定滑動元件的第1接片235a在位置A對電阻體215 抵接，滑動元件的第2接片235b在位置B對集電體212b (潤滑層214)抵接。在圖15中也表示了該初期設定狀態。又，蓋子220的第1突片222設置在距離滑動元件的第 1接片235a較近的位置，蓋子220的第2突片223設置在滑動元件的第2接片235b側。即，在組裝的初期設定時，蓋子的第2突片223，設置成比滑動元件的第1突片222 距離滑動元件的第1接片235a的位置A更遠的位置。在本實施形態的可變電阻器中，將蓋子220安裝到基板210上時，若從蓋子的上面推壓，則蓋子220會有從未與基板210的側面210c相卡合的第2突片223側沈下的傾向，即使蓋子220發生了傾斜，亦會沿圖15所示的箭頭Y 的方向傾斜。該傾斜方向對於位在外側的第1接片235a來說，係離開蓋子220的頂部方向，因此不會引起第1接片 ___ 18___ 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 569245 A7 _____Β7 _ 五、發明說明（0) 235a的變形。而且，由於第2接片235b係位於內側，所以即使蓋子220沿箭頭Y的方向發生了若干傾斜，也不會引起變形。下面說明本發明中可變電阻器的第三實施形態，首先參照圖25〜圖28對其構成加以說明。該可變電阻器，係由樹脂成形品所構成的基板310、由樹脂成形品所構成的蓋子320、以及具有滑動元件335 且由樹脂成形品所構成的旋轉軸330所構成。基板310具有中心孔（軸承孔）311a，並埋設有端子312、313。端子 312的端部312a從基板310的側面突出，中央部係作爲圓環狀的集電體312b且露出於基板310的表面。端子313的端部313a從基板310的側面突出，他端部313b露出於基板310的表面。如圖28所示，前述端子312、313係由長尺寸的環狀材料340衝切成既定形狀，再***成形模具（圖中未顯示 )，成形爲基板310。在該樹脂成形後，在基板31〇的表面上，藉由導電性樹脂材料的塗敷而形成大致呈圓環狀的電阻體315，電阻體315的相互對向的兩端部315a與前述端子313的他端部313b相連接。在集電體312b上設置有導電性潤滑層314。該潤滑層314係以與電阻體315的樹脂成分近似的樹脂作爲其主要成分。或是，潤滑層314係與電阻體315採用同樣的導電性樹脂材料，並與電阻體 315同時塗敷。集電體312b (潤滑層314)係與電阻體315設置於基 _______ 19 本紙張尺度適用中國國家標準（CNS)A4規格（210x37^楚) ----- (請先閱讀背面之注意事項再填寫本頁)569245 A7 _B7___ V. Description of the invention (汄) (Please read the precautions on the back before filling this page). In addition to the first example shown in Figure 19, you can also use the second one shown in Figures 21 and 22. Example, the third example shown in Figs. Of course, a structure other than the above may be adopted. The second example is an engagement structure formed by combining a shallow recessed portion 220d formed by the first protruding piece 222 shown in Fig. 21 and a low engaging protruding portion 210d formed by the recessed portion 210b shown in Fig. 22. The third example is a combination of a rectangular bulged portion 220e formed on the first protruding piece 222 shown in FIG. 23 and a step surface 21 (k formed on the concave portion 210b shown in FIG. 24). However, at the initial stage of the assembly of the sliding element 235, as shown in FIG. 16, the first contact piece 235a of the sliding element is set to abut the resistor 215 at position A, and the second contact piece 235b of the sliding element is set at position B. The current collector 212b (lubricating layer 214) abuts. This initial setting state is also shown in FIG. 15. In addition, the first tab 222 of the cover 220 is provided closer to the first tab 235a of the sliding element. The second protruding piece 223 of the cover 220 is provided on the second receiving piece 235b side of the sliding element. That is, in the initial setting of the assembly, the second protruding piece 223 of the cover is provided to slide further than the first protruding piece 222 of the sliding element. The position of the first tab 235a of the element is further away from the position A. In the variable resistor of this embodiment, when the cover 220 is mounted on the substrate 210, the cover 220 may be pushed from the top when the cover 220 is pushed from the top of the cover. The second protruding piece 223 which is not engaged with the side surface 210c of the substrate 210 tends to sink, even if the cover 220 If it is tilted, it will also tilt in the direction of arrow Y shown in Fig. 15. For the first tab 235a located on the outside, the tilt direction is away from the top of the cover 220, so it will not cause the first tab_ __ 18___ This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) 569245 A7 _____ Β7 _ 5. Description of the invention (0) 235a is deformed. Moreover, because the second tab 235b is located on the inside, so The cover 220 is tilted slightly in the direction of the arrow Y without causing deformation. The third embodiment of the variable resistor in the present invention will be described below. First, the structure of the variable resistor will be described with reference to FIGS. 25 to 28. The device includes a substrate 310 made of a resin molded product, a cover 320 made of a resin molded product, and a rotating shaft 330 including a sliding member 335 and made of a resin molded product. The substrate 310 has a center hole (bearing hole) 311a, and the terminals 312 and 313 are buried. The end portion 312a of the terminal 312 protrudes from the side surface of the substrate 310, and the center portion is a ring-shaped current collector 312b and is exposed on the surface of the substrate 310. The terminal 313 The end portion 313a protrudes from the side surface of the substrate 310, and the other end portion 313b thereof is exposed on the surface of the substrate 310. As shown in FIG. A mold (not shown) is formed into a substrate 310. After the resin is molded, a conductive resin material 315 is formed in a substantially circular shape on the surface of the substrate 31, and the resistor is formed. The opposite end portions 315a of 315 are connected to the other end portion 313b of the terminal 313. A conductive lubricant layer 314 is provided on the current collector 312b. The lubricating layer 314 is made of a resin similar to the resin component of the resistor 315 as its main component. Alternatively, the lubricating layer 314 is made of the same conductive resin material as the resistor 315 and is applied simultaneously with the resistor 315. The current collector 312b (lubricating layer 314) and resistor 315 are installed on the base _______ 19 This paper size applies to China National Standard (CNS) A4 specifications (210x37 ^ Chu) ----- (Please read the precautions on the back first (Fill in this page again)

569245 A7 ____B7______ 五、發明說明（θ ) 板310表面的同心圓上，集電體312b位於電阻體315的內旋轉軸330具有中心孔331，在凸緣部332的周圍安裝有滑動元件335，並以能旋轉自如的方式組裝於基板310 的中心孔311。滑動元件335係由導電性金屬材料所構成，並具有：在電阻體315上在彈性壓接狀態下滑動的刷狀的第1接片335a、以及在集電體312b (潤滑層314)上在彈性壓接狀態下滑動的刷狀的第2接片335b。進而，在前述基板310，設置突出於背面側的圓環狀突部311b。該突部311b與軸承孔311a形成在同心圓上，且與旋轉軸330的中心孔311具有相同的內徑。而且，如圖25 (A)所示，旋轉軸330的中心孔311的圓形孔的一部分係形成被埋設的形狀。如圖26所示，可變電阻器，係在印刷基板345的孔部 346嵌合基板310的突部311，並且，在將端子312、313 焊接在印刷基板45的平面部（圖中未顯示）的狀態下來加以組裝。爲了使旋轉軸330及滑動元件335旋轉，在中心孑L 331、311a中***圖中未表示的操作軸350，該軸的插入部分形成與中心孔331相卡合的形狀，在***的狀態下，以中心孔331及前述突部311b的內周面311c來支撐。藉由向左右任意方向旋轉驅動軸350，使旋轉軸330與滑動元件335 —體旋轉，藉由接片335a、335b相對於電阻體 315及集電體312b的接觸位置的變化，來調整端子312、 313之間的電阻値。 —______20 ____ 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） <請先閱讀背面之注意事項再填寫本頁) :裝 ιδτ·- ;線· 569245 A7 ____B7___ 五、發明說明（θ) 蓋子320，具有將旋轉軸330的上部定位的中心孔321 ，並以咬接方式安裝在基板310。詳言之，如圖30所示，在基板310的側面形成上側傾斜的卡合用突部310a，在蓋子320的側面設置的第1突片322，沿突片322的厚度方向形成有與突部310a相卡合的貫通孔320a，貫通孔320a 以咬接方式卡合在突部310a。進而，在蓋子320，形成位於基板310的側面310c的第2突片323。爲了避免與端子 312、313的干擾，該第2突片323形成梳齒狀，且與側面 310c僅係面接觸而並非卡合。然而，在本實施形態的可變電阻器中，軸350係以旋轉軸330的中心孔331及設置在基板310的圓環狀突部 311b的內周面311c所支撐，能夠使軸承部分的強度增大，耐久性提高。而且，藉由僅使突部311b突出，即可以使基板310薄型化。又，亦可使旋轉軸330的壁厚變薄，變薄的壁厚B如圖26所示。由於旋轉軸330的壁厚可以變薄，中心孔331就可以大徑化，這就意味著軸350的大徑化，從而使其抗旋轉破壞強度提高。前述圓環狀突部311b由於係嵌合在印刷基板345的孔部346，因此，能達成在組裝時之可變電阻器的高度降低，並使圓環狀突部311b的強度得到提高。而且，亦可獲得可變電阻器對基板的定位作用。下面說明本發明之可變電阻器的第4實施形態，首先參照圖31〜圖36對其構成加以說明。該可變電阻器，係由樹脂成形品所構成的基板410、一 —___ 21 ___ 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁)569245 A7 ____B7______ 5. Description of the invention (θ) On the concentric circle of the surface of the plate 310, the current collector 312b is located on the inner rotating shaft 330 of the resistor 315 and has a central hole 331. A sliding element 335 is installed around the flange portion 332, and The center hole 311 of the substrate 310 is rotatably assembled. The sliding element 335 is made of a conductive metal material, and includes a first brush-shaped tab 335a that slides on the resistor 315 in a state of elastic compression, and a current collector 312b (lubricating layer 314). The second brush-shaped contact piece 335b that slides in the elastically crimped state. Further, the substrate 310 is provided with an annular projection 311b protruding from the back side. The protruding portion 311b is formed on a concentric circle with the bearing hole 311a, and has the same inner diameter as the center hole 311 of the rotation shaft 330. Further, as shown in Fig. 25 (A), a part of the circular hole of the center hole 311 of the rotation shaft 330 is formed in a buried shape. As shown in FIG. 26, the variable resistor is fitted in the hole 346 of the printed circuit board 345 to the protrusion 311 of the substrate 310, and the terminals 312 and 313 are soldered to the flat surface of the printed circuit board 45 (not shown in the figure). ). In order to rotate the rotation shaft 330 and the sliding element 335, an operation shaft 350 (not shown) is inserted into the center 孑 L 331, 311a, and the insertion portion of the shaft is formed into a shape engaging with the center hole 331. In the inserted state It is supported by the center hole 331 and the inner peripheral surface 311c of the protrusion 311b. By rotating the driving shaft 350 in any direction, the rotating shaft 330 and the sliding element 335 are rotated together, and the contact positions of the contacts 335a and 335b with respect to the resistor 315 and the current collector 312b are adjusted to adjust the terminal 312. , 313 resistance. —______ 20 ____ This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) < Please read the notes on the back before filling this page): Loading δτ ·-; Line · 569245 A7 ____B7___ V. Invention Explanation (θ) The cover 320 has a center hole 321 for positioning the upper portion of the rotation shaft 330 and is mounted on the substrate 310 by a snap-fit method. In detail, as shown in FIG. 30, an upper side inclined engagement protrusion 310a is formed on the side surface of the substrate 310, and a first protrusion 322 provided on the side surface of the cover 320 is formed with the protrusion along the thickness direction of the protrusion 322. The 310a-phase through-hole 320a is engaged, and the through-hole 320a is engaged with the protrusion 310a by a snap-fit method. Furthermore, a second projection 323 is formed on the cover 320 on the side surface 310c of the substrate 310. In order to avoid interference with the terminals 312 and 313, the second protruding piece 323 is formed in a comb-tooth shape, and is in surface contact with the side surface 310c instead of being engaged. However, in the variable resistor of this embodiment, the shaft 350 is supported by the center hole 331 of the rotation shaft 330 and the inner peripheral surface 311c of the annular projection 311b provided on the substrate 310, and the strength of the bearing portion can be increased. It increases and durability improves. Furthermore, by making only the protrusions 311b project, the substrate 310 can be made thin. In addition, the wall thickness of the rotating shaft 330 may be reduced, and the reduced wall thickness B may be as shown in Fig. 26. Since the wall thickness of the rotating shaft 330 can be reduced, the diameter of the central hole 331 can be increased, which means that the diameter of the shaft 350 is increased, thereby increasing the resistance to rotation failure. Since the annular projection 311b is fitted into the hole 346 of the printed circuit board 345, the height of the variable resistor can be reduced during assembly, and the strength of the annular projection 311b can be improved. Moreover, the positioning effect of the variable resistor on the substrate can also be obtained. Next, a fourth embodiment of the variable resistor of the present invention will be described. First, its configuration will be described with reference to Figs. The varistor is a substrate 410 made of a resin molded product. — — 21 — ___ This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before (Fill in this page)

569245 A7 _____B7___ 五、發明說明（>") 由樹脂成形品所構成的蓋子420、以及具有滑動元件435 且由樹脂成形品所構成的旋轉軸430所構成。基板410具有中心孔411，並埋設有端子412、413。第1端子412的端部412a從基板410的側面突出，中央部係作爲圓環狀的集電體412b且露出於基板410的表面。第1端子412的端部412a與集電體412b係由一片金屬材料一體切割而成。第2端子413的端部413a從基板410 的側面突出，他端部413b露出於基板410的表面。如圖34所示，前述端子412、413係由長尺形的環狀材料440衝切成既定形狀，再***成形模具（圖中未顯示 )，而成形基板410。在該樹脂成形後，在基板410的表面，藉由導電性樹脂材料的塗敷而形成大致圓環狀的電阻體415，電阻體415的相互對向的兩端部415a與前述端子 413的他端部413b相連接。集電體412b與電阻體415設置於基板410表面的同心圓上，集電體412b位於電阻體 415的內側。旋轉軸430，具有中心孔431，在凸緣部432的周圍安裝有滑動元件435，並以能旋轉自如的方式安裝於基板41〇的中心孔411。滑動元件435係由導電性金屬材料所構成 ’並具有：在電阻體415上於彈性壓接狀態下滑動的刷狀的第1接片435a、以及在集電體412b上於彈性壓接狀態下滑動的刷狀的第2接片435b。如圖31 (A)所示，旋轉軸430的中心孔43〇a係形成圓开>孔的一部分被埋設的形狀。藉由中心孔430a中***圖 - ：~— _ 22 本紙張尺度適用中國國家標準(CNS)A4規格（210 X 297公爱〉〜-- --------------裝--- (請先閱讀背面之注意事項再填寫本頁} >δτ·569245 A7 _____B7___ 5. Description of the invention (>) A cover 420 made of a resin molded product and a rotating shaft 430 having a sliding element 435 and made of a resin molded product. The substrate 410 has a center hole 411, and terminals 412 and 413 are embedded. An end portion 412a of the first terminal 412 protrudes from a side surface of the substrate 410, and a central portion thereof is a ring-shaped current collector 412b and is exposed on the surface of the substrate 410. An end portion 412a of the first terminal 412 and the current collector 412b are integrally cut from a single piece of metal material. The end portion 413 a of the second terminal 413 protrudes from the side surface of the substrate 410, and the other end portion 413 b is exposed on the surface of the substrate 410. As shown in FIG. 34, the terminals 412 and 413 are punched into a predetermined shape from an elongated ring-shaped material 440, and then inserted into a mold (not shown) to form a substrate 410. After the resin is formed, a substantially circular resistor body 415 is formed on the surface of the substrate 410 by coating with a conductive resin material. The opposite end portions 415a of the resistor body 415 and the other terminals 413 are formed. The end portions 413b are connected. The current collector 412b and the resistor 415 are disposed on a concentric circle on the surface of the substrate 410, and the current collector 412b is located inside the resistor 415. The rotation shaft 430 has a center hole 431. A sliding element 435 is mounted around the flange portion 432, and is rotatably mounted on the center hole 411 of the substrate 41. The slide element 435 is made of a conductive metal material and has a first brush-shaped tab 435a that slides on the resistor 415 in an elastic crimped state and a current collector 412b in an elastic crimped state. Sliding brush-shaped second tab 435b. As shown in FIG. 31 (A), the center hole 43a of the rotation shaft 430 is formed in a shape in which a part of the circular opening> hole is buried. Insert the figure through the central hole 430a-: ~-_ 22 This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 public love) ~--------------- --- (Please read the precautions on the back before filling this page} > δτ ·

569245 A7 ____B7_____ 五、發明說明（j) --------------裝--- <請先閲讀背面之注意事項再填寫本頁) 中未顯示的操作軸，並向左右任意方向的旋轉，來使旋轉軸430與滑動元件435 —體旋轉，藉由接片435a、435b相對於電阻體415及集電體412b的接觸位置的變化，來變更電阻體415及集電體412b的總面長度，藉此，來調整端子 414、413之間的電阻値。蓋子420，具有將旋轉軸430的上部定位的中心孔421 ，且以咬接方式安裝在基板410。詳言之，如圖36所示，在基板410的側面，形成上側傾斜的卡合用突部410a，在蓋子420的側部設置的第1突片422處，沿突片422的厚度方向形成與突部410a相卡合的貫通孔420a，貫通孔 420a以咬接方式卡合在突部410a。進而，在蓋子420，形成位於基板410的側面410c的第2突片423。爲了避免與端子412、413的干擾，該第2突片423形成梳齒狀，且與側面410c僅係面接觸而並非卡合。 -線然而，在第1實施形態的可變電阻器中，集電體412b 與第1端子412係由一片金屬材料所一體形成，在集電體 412b與第1端子412之間不存在接合部。因此，即使端子 412受到負載的作用，或集電體412b受到熱應力的作用，也不會發生端子412與集電體412b之間的電氣特性惡化、或動作不良、不能動作等功能障礙。而且，由於在基板 410上設置集電體，故不須糊料的塗敷、燒結的製程，並使集電體412b與端子412 —體切割，對模具***後而設置於基板410，故可以降低製造成本。進而，因不使用含銀的糊料，所以也不會發生由於銀的硫化而引起接觸電阻變 23 尺度適用中國國家標準（CNS)A4規格（210 X 297公楚) ·~ 569245 A7 _B7____ 五、發明說明（，）大的不良現象。下面參照圖37、38對本發明之可變電阻器的第5實施形態加以說明。該可變電阻器與前述第1實施形態具有基本上相同的構成，其不同之處在於，如圖37所示，在集電體412b上設置有導電性潤滑層414。該潤滑層414，係使用能夠減小與滑動元件435的摩擦阻力的碳或石墨爲主要成分的材料，以與電阻體415的樹脂成分相近似的樹脂爲主要成分。或者潤滑層414亦可與電阻體415爲同一材料。如果潤滑層414與電阻體415採用同一材料，則可以同時對二者進行網版印刷等塗敷處理，可提高作業性。如本第5實施形態，如果在集電體412b上設置了導電性潤滑層414，則可以使其與滑動元件435之間的磨損大大降低，從而可延長集電體412b的壽命。爲了提高滑動性，除了設置這樣的潤滑層414之外/還可以考慮進行使接片435a、435b分別與電阻體415及集電體412b之間的摩擦阻力降低的表面處理。然而，對於滑動元件435的一個構件的兩處（接片435a、435b)進行不同的處理，會引起製造成本的上升，故並不理想。在本第5實施形態中，以在集電體412b上設置潤滑層414的廉價的方法，可以延長集電體412b的壽命，使其與電阻體415幾乎相同。然而，如圖38所示，較佳係畫有斜線的潤滑層414的寬度尺寸B與集電體412b的寬度尺寸a相比，相同或較小。換言之，較佳係潤滑層414不要超越集電體412b而覆蓋到基板410上。由於金屬材料（集電體412b)與樹脂材 I紙張尺度適用中國國家標準（CNS)A4規格（210X 297¾^ " 一 ' --------------裝--- (請先閱讀背面之注意事項再填寫本頁) I. 丨線 569245 A7 _____ 五、發明說明（A ) 料（基板410)的熱膨脹係數不同，如果潤滑層414同時跨越集電體412b與基板410而形成，則會因熱應力而會有使潤滑層414產生裂紋之虞。所以，藉由滿足b 的條件，就能夠將潤滑層414上裂紋的發生、對接片435b的不良影響等不良的情況可防患於未然。又，設置潤滑層414的作用效果，對於習知例的圖 7〜9中所示可變電阻器的集電體104同樣可適用，同樣奏效。本發明的可變電阻器並不限於前述實施形態，在其主要要旨的範圍內可以進行種種變更。特別地，集電體可以不是完全的圓環狀，也可以係一部分缺口的大致圓環狀。〔發明效果〕由以上的說明可知，根據本發明，由於在旋轉軸形成的梯級面與在基板中心孔的內周面形成的凹部之梯級面相抵接旋轉，所以在該抵接部發生的樹脂粉末就不會飛散於基板的表面，能夠防止滑動元件與集電體及電阻體的接觸障礙，從而延長滑動元件的旋轉壽命。另外，若在突出於基板背面的圓環狀突部形成前述中心孔，則能夠增加***於旋轉軸的軸的軸承部分的強度。進而，若將圓環狀突部嵌合於印刷基板的孔部，在組裝時能夠使可變電阻器的高度降低，而且，藉由印刷基板可對圓環狀突部補強。而且，亦可獲得可變電阻器對基板的定位作用。根據本發明，由於與在基板側面形成的卡合部相卡合 ^___25__ 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁)569245 A7 ____B7_____ V. Description of the invention (j) -------------- Installation --- < Please read the precautions on the back before filling this page), and Rotate to any direction to rotate the rotating shaft 430 and the sliding element 435 together, and change the contact positions of the tabs 435a and 435b with respect to the resistor 415 and the current collector 412b to change the resistor 415 and the current collector The overall length of the electric body 412b is used to adjust the resistance 値 between the terminals 414 and 413. The cover 420 has a center hole 421 for positioning an upper portion of the rotation shaft 430 and is mounted on the substrate 410 in a snap-fit manner. Specifically, as shown in FIG. 36, on the side surface of the substrate 410, an engaging protrusion 410a inclined at the upper side is formed, and a first protrusion 422 provided on the side of the cover 420 is formed along the thickness direction of the protrusion 422. The protruding portion 410a is engaged with the through hole 420a, and the through hole 420a is engaged with the protruding portion 410a by a snap-fit method. Further, a second projection 423 is formed on the cover 420 on the side surface 410c of the substrate 410. In order to avoid interference with the terminals 412 and 413, the second protruding piece 423 is formed in a comb-tooth shape and is in surface contact with the side surface 410c instead of being engaged. -Wire However, in the variable resistor of the first embodiment, the current collector 412b and the first terminal 412 are integrally formed of a single piece of metal material, and there is no joint between the current collector 412b and the first terminal 412. . Therefore, even if the terminal 412 is subjected to a load or the current collector 412b is subjected to a thermal stress, functional characteristics such as deterioration of the electrical characteristics between the terminal 412 and the current collector 412b, malfunction, or inability to operate will not occur. In addition, since the current collector is provided on the substrate 410, the process of coating and sintering of the paste is not required, and the current collector 412b and the terminal 412 are cut into one body, and the mold is inserted into the substrate 410. Reduce manufacturing costs. Furthermore, because no silver-containing paste is used, the contact resistance does not change due to the vulcanization of silver. The standard of China National Standard (CNS) A4 (210 X 297) is applicable to the standard. ～ 569245 A7 _B7____ V. Description of the invention (,) Big bad phenomenon. Next, a fifth embodiment of the variable resistor of the present invention will be described with reference to Figs. This varistor has a configuration basically the same as that of the first embodiment, except that a conductive lubricating layer 414 is provided on the current collector 412b as shown in Fig. 37. The lubricating layer 414 is made of carbon or graphite as a main component which can reduce the frictional resistance with the sliding element 435, and a resin similar to the resin component of the resistor 415 is a main component. Alternatively, the lubricating layer 414 may be made of the same material as the resistor 415. If the lubricating layer 414 and the resistor 415 are made of the same material, they can be simultaneously subjected to a coating process such as screen printing, thereby improving workability. As in the fifth embodiment, if the conductive lubricating layer 414 is provided on the current collector 412b, the wear between the conductive lubricating layer 414 and the sliding element 435 can be greatly reduced, and the life of the current collector 412b can be extended. In order to improve the sliding property, in addition to providing such a lubricating layer 414, a surface treatment for reducing the frictional resistance between the contacts 435a and 435b and the resistor 415 and the current collector 412b, respectively, may be considered. However, it is not desirable to perform different treatments on two places (the tabs 435a, 435b) of one member of the sliding element 435, which causes an increase in manufacturing cost. In the fifth embodiment, the current collector 412b can be extended to have a lifespan that is almost the same as that of the resistor 415 by an inexpensive method of providing the lubricant layer 414 on the current collector 412b. However, as shown in FIG. 38, it is preferable that the width dimension B of the lubricating layer 414 with diagonal lines is the same as or smaller than the width dimension a of the current collector 412b. In other words, it is preferable that the lubricating layer 414 does not cover the substrate 410 beyond the current collector 412b. Because the metal material (collector 412b) and the resin material I paper size are applicable to the Chinese National Standard (CNS) A4 specification (210X 297¾ ^ " a '-------------- install --- (Please read the precautions on the back before filling this page) I. 丨 Line 569245 A7 _____ V. Description of the Invention (A) The thermal expansion coefficient of the material (substrate 410) is different. If the lubricating layer 414 crosses the current collector 412b and the substrate 410 at the same time If it is formed, cracks may occur in the lubricating layer 414 due to thermal stress. Therefore, by satisfying the condition of b, it is possible to prevent the occurrence of cracks in the lubricating layer 414 and the adverse effects of the butt piece 435b. It is possible to prevent problems beforehand. In addition, the effect of providing the lubricating layer 414 is also applicable to the current collector 104 of the variable resistor shown in Figs. 7 to 9 of the conventional example, and it is equally effective. The variable resistor of the present invention The device is not limited to the aforementioned embodiment, and various changes can be made within the scope of its main gist. In particular, the current collector may not be a complete ring shape, or it may be a substantially circular shape with a part of a notch. [Inventive Effects] By The above description shows that according to the present invention Since the step surface formed on the rotation axis and the step surface of the recessed portion formed on the inner peripheral surface of the center hole of the substrate abut against rotation, the resin powder generated in the abutting portion will not scatter on the surface of the substrate, which can prevent sliding The contact failure between the element and the current collector and resistor increases the rotation life of the sliding element. In addition, if the center hole is formed in a circular protrusion protruding from the back of the substrate, the bearing of the shaft inserted into the rotating shaft can be increased. In addition, if the annular protrusion is fitted into the hole portion of the printed circuit board, the height of the variable resistor can be reduced during assembly, and the annular protrusion can be reinforced by the printed circuit board. Moreover, the positioning effect of the variable resistor on the substrate can also be obtained. According to the present invention, since it engages with the engaging portion formed on the side of the substrate ^ ___ 25__ This paper size is applicable to China National Standard (CNS) A4 (210 X 297) Mm) (Please read the notes on the back before filling in this page)

569245 A7 _____B7 _ 五、發明說明（外） ----------------- (請先閲讀背面之注意事項再填寫本頁) 的突片附近不存在貫通可變電阻器內部的開口部，所以能夠確保蓋子內部的防塵，即能夠防止微小異物的侵入。因此，能夠解決滑動元件的接觸障礙、短路及旋轉壽命的惡化等問題點。根據本發明，即使在對基板安裝蓋子時發生了傾斜，該傾斜也不會對位於外側的容易引起變形的滑動元件的第 1接片產生影響。因此可以得到接觸可靠性高的可變電阻器。又，在上述發明中，由於基板與蓋子的卡合採用了所謂的咬接方式，與其他結合方式相比，不需要特別的加工，具有組裝簡單、適合於量產、成本低等優點。線· 根據本發明，由於在旋轉軸的中心孔內***的軸，不僅由該中心孔所支撐，而且還由在基板的背面設置的圓環狀突部所支撐，所以能夠增強軸承部分的強度，提高其耐久性。而且，還由於能夠達到基板的薄型化、旋轉軸的薄壁化，軸的大徑化等，所以能夠提高軸的抗旋轉破壞強度〇另外，如果使在基板背面設置的圓環狀突部具有與旋轉軸的中心孔相同的內徑，則基本上可以使用具有連貫直徑的軸。進而，若將圓環狀突部嵌合於印刷基板的孔部，則在組裝時能夠使高度降低，而且，對突部有補強作用。亦可獲得可變電阻器對基板的定位作用。根據本發明，由於使集電體與第1端子一體形成並露出於基板的表面，所以集電體與第1端子的接觸可靠性高 26____ 本紙張尺度適用中國國家標準(CNS)A4規格（210 X 297公釐） 569245 A7 ________B7__ _ __ 五、發明說明（、Λ) ，不需要藉由另外的製程把集電體形成在基板上，所以能夠以低成本製造可變電阻器。進而，因不使用含銀的糊料，所以也不會發生由於銀的硫化而引起電阻增大的不良現象。而且，在本發明中，藉由在前述集電體上設置導電性潤滑層，可以延長集電體的壽命。進而，如果該潤滑層與電阻體係同一材料，則潤滑層與電阻體可由同一製程形成。並且，當潤滑層的寬度尺寸與集電體的寬度尺寸相比’ 相同或較小時，則能夠避免由於熱應力的影響而引起潤滑層的裂紋發生。〔圖式簡單說明〕圖1係表示本發明第1實施形態的可變電阻器，（Α )係俯視圖，（Β)係側視圖。圖2係表示把前述可變電阻器組裝在印刷基板上的截面圖。圖3係表示前述可變電阻器的基板的俯視圖。圖4係表示前述基板鑄模成形狀態的俯視圖。圖5係表示可變電阻器的蓋子的立體圖。圖6係表示前述可變電阻器與蓋子的卡合構造一例的截面圖。圖7係表示習知的可變電阻器，（Α)係俯視圖，（Β )係側視圖。圖8係表示圖7所示可變電阻器的截面圖。圖9係表示圖7所示可變電阻器基板的俯視圖。 _________2J_ 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁)569245 A7 _____B7 _ V. Description of the invention (outside) ----------------- (Please read the precautions on the back before filling this page) There is no penetration change near the tabs The openings inside the resistor ensure dust-proof inside the cover, that is, prevent the invasion of tiny foreign objects. Therefore, it is possible to solve problems such as contact failure of the sliding element, short circuit, and deterioration of the rotation life. According to the present invention, even if a tilt occurs when the cover is attached to the substrate, the tilt does not affect the first tab of the sliding element which is easily deformed on the outside. Therefore, a variable resistor having high contact reliability can be obtained. Moreover, in the above invention, since the so-called snap-in method is adopted for the engagement between the substrate and the cover, compared with other bonding methods, no special processing is required, and it has the advantages of simple assembly, suitable for mass production, and low cost. Wire · According to the present invention, since the shaft inserted into the center hole of the rotating shaft is supported not only by the center hole but also by a ring-shaped protrusion provided on the back surface of the substrate, the strength of the bearing portion can be enhanced To improve its durability. In addition, since the thickness of the substrate can be reduced, the thickness of the rotating shaft can be reduced, and the shaft can be increased in diameter, the strength of the shaft can be increased. Also, if the annular protrusion provided on the back surface of the substrate is provided with With the same inner diameter as the center hole of the rotating shaft, a shaft with a continuous diameter can basically be used. Furthermore, when the annular protrusion is fitted into the hole portion of the printed circuit board, the height can be reduced during assembly, and the protrusion can have a reinforcing effect. The positioning effect of the variable resistor on the substrate can also be obtained. According to the present invention, since the current collector and the first terminal are integrally formed and exposed on the surface of the substrate, the contact reliability between the current collector and the first terminal is high. 26____ This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 569245 A7 ________B7__ _ __ 5. Description of the invention (, Λ), there is no need to form the current collector on the substrate by another process, so the variable resistor can be manufactured at low cost. Furthermore, since a silver-containing paste is not used, there is no occurrence of a problem of increased resistance due to silver vulcanization. Further, in the present invention, by providing a conductive lubricating layer on the current collector, it is possible to extend the life of the current collector. Furthermore, if the lubricating layer is the same material as the resistor system, the lubricating layer and the resistor body can be formed by the same process. In addition, when the width dimension of the lubricating layer is the same as or smaller than the width dimension of the current collector, it is possible to avoid cracks in the lubricating layer due to the influence of thermal stress. [Brief Description of the Drawings] FIG. 1 is a varistor showing a first embodiment of the present invention, (A) is a plan view, and (B) is a side view. Fig. 2 is a cross-sectional view showing that the variable resistor is assembled on a printed circuit board. FIG. 3 is a plan view showing a substrate of the variable resistor. FIG. 4 is a plan view showing a state where the substrate mold is formed. Fig. 5 is a perspective view showing a cover of a variable resistor. Fig. 6 is a sectional view showing an example of the engaging structure of the variable resistor and the cover. FIG. 7 shows a conventional variable resistor, (A) is a plan view, and (B) is a side view. FIG. 8 is a cross-sectional view showing the variable resistor shown in FIG. 7. FIG. 9 is a plan view showing the variable resistor substrate shown in FIG. 7. _________2J_ This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page)

569245 _B7__ 五、發明說明（久）圖10係表示圖7所示可變電阻器的截面圖。圖11係表示圖7所示可變電阻器的卡合構造的截面圖〇圖12係表示對圖7所示可變電阻器的蓋子進行樹脂成形用的模具的截面圖。圖13係表示圖7所示可變電阻器的截面圖。圖14係本發明第2實施形態的可變電阻器，（A)係俯視圖，（B )係側視圖。圖15係表示前述可變電阻器的截面圖。圖16係表示前述可變電阻器的基板的俯視圖。圖17係表示前述基板之鑄模成形狀態的俯視圖。圖18係表示可變電阻器的蓋子的立體圖。圖19係表示前述可變電阻器與蓋子的卡合構造一例的截面圖。圖20係表示對前述蓋子進行樹脂成形用的模具的截面圖。圖21係表示卡合構造的第2例中蓋子側卡合部，（A )係俯視圖，（B)係側視圖。圖22係表示卡合構造的第2例中基板側的卡合部，（ A)係俯視圖，（B)係側視圖。圖23係表示卡合構造的第三例中蓋子側卡合部，（A )係俯視圖，（B)係側視圖。圖24係表示卡合構造的第三例中基板側的卡合部，（、 A)係俯視圖，（B)係側視圖。 28 請先閱讀背再填 % 本頁本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 569245 A7 ___B7 ______- 五、發明說明（/1) 圖25係本發明第3實施形態的可變電阻器，（A)係俯視圖，（B )係側視圖。圖26係表示在印刷基板組裝前述可變電阻器，並揷入軸的狀態的截面圖。圖27係表示前述可變電阻器的基板的俯視圖。圖28係表示前述基板的鑄鑄模成形狀態的俯視圖。圖29係表示可變電阻器的蓋子的立體圖。圖30係表示前述可變電阻器與蓋子的卡合構造一例的截面圖。圖31係本發明第4實施形態的可變電阻器，（A)係俯視圖，（B)係側視圖。圖32係表示前述可變電阻器在印刷基板組裝後的狀態之截面圖。圖33係表示前述可變電阻器的基板的俯視圖。圖34係表示前述基板鑄模成形狀態的俯視圖。圖35係表示可變電阻器的蓋子的立體圖。圖36係表示前述可變電阻器與蓋子的卡合構造一例的截面圖。圖37係表示本發明第5實施形態的可變電阻器的基板的俯視圖。圖38係表示集電體與潤滑層的寬度尺寸關係之說明圖〇〔符號說明〕 10—基板，11 一圓環狀突部，11a —中心孔，lib—凹 ____29 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） " " " -----II--I---. I I t請先閲讀背面之注意事項再填寫本頁) 訂：569245 _B7__ 5. Description of the invention (long time) FIG. 10 is a cross-sectional view showing the variable resistor shown in FIG. 7. Fig. 11 is a cross-sectional view showing the engaging structure of the variable resistor shown in Fig. 7; Fig. 12 is a cross-sectional view showing a mold for resin-forming the lid of the variable resistor shown in Fig. 7. FIG. 13 is a cross-sectional view showing the variable resistor shown in FIG. 7. Fig. 14 is a variable resistor according to a second embodiment of the present invention, (A) is a plan view, and (B) is a side view. FIG. 15 is a cross-sectional view showing the variable resistor. FIG. 16 is a plan view showing a substrate of the variable resistor. FIG. 17 is a plan view showing a mold forming state of the substrate. FIG. 18 is a perspective view showing a cover of the variable resistor. Fig. 19 is a cross-sectional view showing an example of the engaging structure of the variable resistor and the cover. Fig. 20 is a sectional view showing a mold for resin-molding the lid. FIG. 21 shows a lid-side engaging portion in a second example of the engaging structure, (A) is a plan view, and (B) is a side view. FIG. 22 is a diagram showing an engagement portion on the substrate side in a second example of the engagement structure, (A) is a plan view, and (B) is a side view. FIG. 23 shows a lid-side engaging portion in a third example of the engaging structure, (A) is a plan view, and (B) is a side view. FIG. 24 is a diagram showing an engagement portion on the substrate side in a third example of the engagement structure, (, A) is a plan view, and (B) is a side view. 28 Please read the back and then fill in% This page applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 569245 A7 ___B7 ______- 5. Description of the invention (/ 1) Figure 25 shows the third implementation of the present invention (A) is a plan view of the varistor, and (B) is a side view. Fig. 26 is a cross-sectional view showing a state in which the variable resistor is assembled on a printed circuit board and is inserted into a shaft. FIG. 27 is a plan view showing a substrate of the variable resistor. FIG. 28 is a plan view showing a state where a mold of the substrate is formed. FIG. 29 is a perspective view showing a cover of a variable resistor. Fig. 30 is a cross-sectional view showing an example of the engaging structure of the variable resistor and the cover. Fig. 31 is a variable resistor according to a fourth embodiment of the present invention, (A) is a plan view, and (B) is a side view. Fig. 32 is a sectional view showing the state of the variable resistor after the printed circuit board is assembled. FIG. 33 is a plan view showing a substrate of the variable resistor. FIG. 34 is a plan view showing a state where the substrate mold is formed. Fig. 35 is a perspective view showing a cover of a variable resistor. Fig. 36 is a cross-sectional view showing an example of the engaging structure of the variable resistor and the cover. Fig. 37 is a plan view showing a substrate of a variable resistor according to a fifth embodiment of the present invention. Figure 38 is an explanatory diagram showing the relationship between the width and size of the current collector and the lubricating layer. 〇 [Description of Symbols] 10—substrate, 11—annular protrusion, 11a—center hole, lib—concave ____ 29 This paper size applies to Chinese national standards (CNS) A4 specification (210 X 297 mm) " " " ----- II--I ---. II t Please read the notes on the back before filling this page) Order:

569245 A7 B7 五、發明說明（J ) 部，lie一梯級面，12、13 —端子，12b-集電體，15—電阻體，30—旋轉軸，31—中心孔，32—凸緣部，33 —梯級面，35—滑動元件，45 —印刷基板，46—孔部，C一間隙。 --------------裝--- (請先閱讀背面之注意事項再填寫本頁) 訂·- 丨線· 30 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐）569245 A7 B7 V. Part (J) of the invention, lie-step surface, 12, 13-terminal, 12b-collector, 15-resistor, 30-rotation shaft, 31-center hole, 32-flange, 33—step surface, 35—sliding element, 45—printed substrate, 46—hole portion, C—clearance. -------------- Install --- (Please read the precautions on the back before filling in this page) Order ·-丨 Line · 30 This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)

Claims

569245 ab C8 D8 六、申請專利範圍 L-種可變電隱，係在_脂材料__基板上 ’將分別與端子電氣連接的電阻體及集電體設置於同心圓上’並且’將安裝有滑動元件且由樹脂材料構成的旋轉軸，以使該滑動元件能在電阻體及集電體上滑謝裝於前述基板，其特徵在於：在前述基板形成用來將前述旋轉軸組裝成旋轉自如的中心孔，並且，在前述基板形成凹部，該凹部係在與該中心孔呈同心的圓上，以梯級面與該中心孔連接；在前〜述^旋轉軸，形成與前、述凹部的梯級面對向的梯級面；前述旋轉軸的梯級面係與前、述凹部的梯級面相互抵接 0 2. 如申請專利範圍第1項之可變電阻器，其中，前述滑動元件係安裝在從前述旋轉軸外周面突出的凸緣部，在該凸緣部與前述基板的表面之間形成間隙。 3. 如申請專利範圍第1項之可變電阻器，其中，前述中心孔形成在從前述基板的背面突出的圓環狀突部。 4·如申請專利範圍第3·項之可變電阻器，其中，前述圓環狀突部係嵌合在印刷基板的孔部。 5.如申請專利範圍第1項之可變電阻器，其中，前述基板係以由則述樹脂材料所構成的蓋子所覆蓋，在前述基板的側面形成桌1卡合部，在設置於前述蓋子的側部的突片，以在前述蓋子的突片附近不存在貫通可變電阻器內部之開口部的方式，來形成與前述基板的第1卡合部相卡合 _________j______ 本紙張尺度適用中國國家標準(CNS)A4規格(210 x 297公釐) ' 一 — — — — — — — — — — —1 屋 —應 II— ！1111 ·111 (請先閲讀背面之注意事項再填寫本頁) 、1T.· 線 569245 g _ 六、申請專利範圍的蓋子的第2卡合部。 6. 如申請專利範圍第5項之可變電阻器，其中：前述第2卡合部係沿前述突片之厚度方向形成的貫通孔。 7. 如申請專利範圍第6項之可變電阻器，其中：前述貫通孔係在進行樹脂成形前述蓋子時，藉由從一方的模具側壁部的側方進退自如的可動構件來形成者。 8·如申請專利範圍第1項之可變電阻器，其中：前述基板係以由前述樹脂材料所構成的蓋子所覆蓋，在前述基板的側面形成第1卡合部，在設置於前述蓋子的側部的突片，形成與前述第1卡合部相卡合的第2卡合部，作爲沿該突片厚度方向形成的貫通孔，前述貫通孔係在進行樹脂成形前述蓋子時，藉由從一方的模具側壁部的側方進退自如的可動構件來形成者。 9.一種可變電阻器，係在由樹脂材料所構成的基板上，將分別與端子電氣連接的電阻體及位於該電阻體內側之集電體設置於同心圓上，並且，將安裝有滑動元件的旋轉軸，以使該滑動元件之第1接片在電阻體上、該滑動元件之第2接片在集電體上分別能滑動的方式來安裝於前述基板，其特徵在於：則述基板係由前述樹脂材料所構成的蓋子所覆蓋；在則述盍子的側部形成位於前述基板側面的第丨及第 2犬片，在苐1突片形成與在前述基板側面形成的第1卡合部相卡合的第2卡合部，而在第2突片不形成卡合部；前述蓋子的第2突片，係設置成比蓋子的第丨突片更 -------2 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公爱----- (請先閲讀背面之注意事項再塡寫本頁)569245 ab C8 D8 VI. Application scope of patent L-variable electric concealment, which is on the _lipid material__ substrate 'the resistors and collectors that will be electrically connected to the terminals will be placed on concentric circles' and will be installed A rotating shaft having a sliding element and made of a resin material, so that the sliding element can be mounted on the substrate on the resistor and the current collector, and is characterized in that the substrate is formed on the substrate to assemble the rotating shaft to rotate A free center hole, and a recess is formed on the substrate, the recess is connected to the center hole in a circle concentric with the center hole, and is connected to the center hole by a step surface; The step surface facing the step surface; the step surface of the rotation axis and the step surface of the recessed portion mentioned above abut each other. 2. For example, the variable resistor of the first scope of the patent application, wherein the aforementioned sliding element is installed A gap is formed between the flange portion and the surface of the substrate in a flange portion protruding from the outer peripheral surface of the rotation shaft. 3. The variable resistor according to item 1 of the patent application, wherein the center hole is formed in a ring-shaped projection protruding from the back surface of the substrate. 4. The variable resistor according to item 3 of the patent application scope, wherein the annular projection is fitted in a hole portion of a printed circuit board. 5. The variable resistor according to item 1 of the patent application, wherein the substrate is covered with a cover made of a resin material described above, an engaging portion of the table 1 is formed on a side surface of the substrate, and the cover is provided on the cover. The protruding piece on the side of the cover is formed to engage with the first engaging portion of the substrate in such a manner that there is no opening portion penetrating the inside of the variable resistor near the protruding piece of the cover _________j______ This paper size is applicable to China National Standard (CNS) A4 Specification (210 x 297 mm) 'One — — — — — — — — — — 1 House — Should II —! 1111 · 111 (Please read the precautions on the back before filling out this page), 1T. · Thread 569245 g _ 6. The second engaging part of the cover for patent application. 6. The variable resistor according to item 5 of the patent application, wherein the second engaging portion is a through hole formed in a thickness direction of the protruding piece. 7. The variable resistor according to item 6 of the patent application, wherein the through-hole is formed by a movable member that can advance and retract from the side of one side wall portion of the mold during resin molding of the cover. 8. The variable resistor according to item 1 of the patent application scope, wherein the substrate is covered with a cover made of the resin material, a first engaging portion is formed on a side surface of the substrate, and The projecting piece on the side part forms a second engaging portion that engages with the first engaging portion. As a through hole formed in the thickness direction of the protruding piece, the through hole is formed by resin molding the lid by It is formed by a movable member that can move forward and backward from the side of one side wall of the mold. 9. A variable resistor, which is provided on a substrate made of a resin material, and a resistor body electrically connected to a terminal and a current collector located inside the resistor body are provided on a concentric circle, and a slide is installed. The rotation axis of the element is mounted on the substrate so that the first tab of the sliding element is on the resistor and the second tab of the sliding element is slidable on the current collector, and is characterized in that: The substrate is covered with a cover made of the aforementioned resin material; the first and second dog pieces located on the side of the substrate are formed on the side of the zongzi; The second engaging part is engaged with the engaging part, and the engaging part is not formed on the second protruding piece; the second protruding piece of the cover is provided more than the first protruding piece of the cover ------ -2 This paper size applies to China National Standard (CNS) A4 specifications (210 X 297 public love ----- (Please read the precautions on the back before copying this page)

569245 A8 題 D8 六、申請專利範圍遠離在組裝初期設定時的前述滑動元件的第1接片的位置 0 10·如申請專利範圍第9項之可變電阻器’其中’形成在第1突片上的第2卡合部，係以在第1突片附近不存在貫通可變電阻器內部之開口部的方式來形成。 11. 如申請專利範圍第10項之可變電阻器，其中，前述第2卡合部的開口部係沿前述第1突片之厚度方向形成的貫通孔。 12. 如申請專利範圍第11項之可變電阻器，其中，前述貫通孔係在進行樹脂成形前述蓋子時，藉由從一方的模具側壁部的側方進退自如的可動構件來形成者。 13. 如申請專利範圍第1項之可變電阻器’其中’在前述基板的大致中央形成以能旋轉自如的方式來組裝前述旋轉軸的軸承孔，並且，在基板的背面設置突出於與前述軸承孔呈同心的圓上的圓環狀突部。 14. 如申請專利範圍第1項之可變電阻器，其中，藉由 ***在前述旋轉軸的中心孔之軸使旋轉軸與滑動元件一體旋轉，在前述基板的背面設置突出於與前述軸承孔呈同心的圓上的圓環狀突部，把該突部的內周面作爲前述軸的軸承來作用。 15. 如申請專利範圍第13項之可變電阻器，其中，前述圓環狀突部與前述旋轉軸的中心孔具有相同的內徑。 16. 如申請專利範圍第13項之可變電阻器，其中，前述圓環狀突部係嵌合於印刷基板的孔部。本紙張尺度中國國家標準(CNS)A4規格(210 X 297公釐) (請先閲讀背面之注意事項再塡寫本頁)569245 A8 Question D8 Sixth, the position of the patent application is far from the position of the first tab of the aforementioned sliding element during the initial setting of the assembly 0 10 · As in the application of the patent scope 9 of the variable resistor 'wherein' is formed on the first tab The second engaging portion is formed so that there is no opening portion penetrating the inside of the variable resistor near the first tab. 11. The variable resistor according to claim 10, wherein the opening of the second engaging portion is a through-hole formed in the thickness direction of the first protruding piece. 12. The variable resistor according to item 11 of the patent application, wherein the aforementioned through-hole is formed by a movable member that can move forward and backward from the side wall portion of one mold when resin-molding the lid. 13. As in the variable resistor of the first patent application, 'wherein', a bearing hole for assembling the rotating shaft in a freely rotatable manner is formed at approximately the center of the substrate, and a rear surface of the substrate is provided with a protrusion protruding from the bearing. The bearing hole is a ring-shaped protrusion on a concentric circle. 14. The variable resistor according to item 1 of the scope of patent application, wherein the rotation shaft and the sliding element are rotated integrally by an axis inserted in the center hole of the rotation shaft, and a protrusion protruding from the bearing hole is provided on the back surface of the substrate. An annular projection on a concentric circle uses the inner peripheral surface of the projection as a bearing for the shaft. 15. The variable resistor according to item 13 of the patent application, wherein the annular projection has the same inner diameter as the center hole of the rotation shaft. 16. The variable resistor according to item 13 of the patent application, wherein the annular protrusion is fitted into a hole of a printed circuit board. This paper is a Chinese national standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before writing this page)

569245 A8 B8 C8 D8 六、申請專利範圍 17. 如申請專利範園第1項之可變電阻器，其中，前述端子係由第1及第2端子所構成；前述集電體係由與前述第i端子一體形成的圓環狀或大致圓環狀的金屬材料所構成，並露出於前述基板的表面按照前述滑動元件的旋轉位置而變更前述集電體及電阻體的總總面長度，藉此，來調整前述第1端子與第2端子之間的電阻値。 18. 如申請專利範圍第π項之可變電阻器，其中，在前述集電體上設置有導電性潤滑層。 19·如申請專利範圍第18項之可變電阻器，其中，前述導電性潤滑層與前述電阻體係同一材料。 20·如申請專利範圍第18項之可變電阻器，其中，前述導電性潤滑層的寬度尺寸等於或小於集電體的寬度尺寸本紙張尺度適用中國國家標準(CNS)A4規格(210X 297公营) (請先閲讀背面之注意事項再填寫本頁)569245 A8 B8 C8 D8 6. Scope of patent application 17. For example, the variable resistor of item 1 of the patent application park, wherein the aforementioned terminals are composed of the first and second terminals; the aforementioned current collecting system is composed of the same as the aforementioned i The terminal is integrally formed of a ring-shaped or substantially ring-shaped metal material and is exposed on the surface of the substrate to change the total total surface length of the current collector and the resistor in accordance with the rotation position of the sliding element. To adjust the resistance 値 between the first terminal and the second terminal. 18. The variable resistor according to claim π, wherein a conductive lubricating layer is provided on the current collector. 19. The variable resistor according to claim 18, wherein the aforementioned conductive lubricating layer is the same material as the aforementioned resistance system. 20. The variable resistor according to item 18 of the scope of patent application, wherein the width dimension of the aforementioned conductive lubricating layer is equal to or smaller than the width dimension of the current collector. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X 297). ) (Please read the notes on the back before filling this page)