JP2009026983A - Electronic component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic component which can obtain a large maximum attenuation amount and can be downsized. <P>SOLUTION: The electronic component includes: a flexible circuit board 80 for which a resistor pattern 83 and a common pattern 85 are formed in parallel, a conductor pattern 89 is connected to the end of the resistor pattern 83, the end of the conductor pattern 89 is turned to a terminal electrode part 93, and an auxiliary conductor pattern 97 arranged along the conductor pattern 89 is formed near the terminal electrode part 93 further; and a slider 41 which is provided with a first sliding sash 45a to be in slidable contact with the common pattern 85 and a second sliding sash 45b to be in slidable contact with the resistor pattern 83, the conductor pattern 89 and the auxiliary conductor pattern 97, wherein the second sliding sash 45b is abutted to the auxiliary conductor pattern 97 at the terminal abutting position. The terminal abutting position of the first sliding sash 45a to the common pattern 85 is set to a position separated from the terminal electrode part 93 more than the terminal abutting position of the second sliding sash 45b to the auxiliary conductor pattern 97. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electronic component having a structure in which a resistance value is changed by moving a slider.

  Conventionally, some electronic components have a structure in which a slider attached to a sliding object is brought into sliding contact with a resistor pattern and a common pattern provided on a circuit board, thereby changing a resistance value between both patterns. There are electronic components (variable resistors). In this type of electronic component, for example, in the variable resistor shown in FIG. 1 of Patent Document 1, the maximum attenuation when the slider (5) is fully turned to the attenuation maximum side is the resistance of the resistor (1). It is determined by the total resistance value RA, the resistance value RR of the conductor (6) connected to the end thereof, and the resistance value RT of the connection portion between the conductor (6) and the external lead terminal portion (2), and (RR + RT ) / (RA + RR + RT). That is, the maximum attenuation is limited by the resistance value RR of the conductor (6) (because the resistance value RR is about 50 to 100 times as large as the resistance value RT).

  Therefore, in Patent Document 1, as shown in FIG. 3, the auxiliary conductor (8) connected to the external extraction terminal (2) on the maximum attenuation side only at a portion other than the conductor (6) is formed. The slider (5) is connected to the auxiliary conductor (8) when the slider (5) is fully turned to the attenuation amount side. Since no current flows between the auxiliary conductor (8) and the external extraction terminal portion (2) and there is no voltage drop, the amount of attenuation is determined only by the resistance value RT of the connection portion of the external extraction terminal portion (2). That is, the maximum attenuation is (RT) / (RA + RR + RT), and RT << (RA + RR + RT), so that a large maximum attenuation can be obtained.

  Incidentally, the variable resistor disclosed in Patent Document 1 is a rotary variable resistor. When this variable resistor is applied to a slide type variable resistor, a circuit board 500 having a structure shown in FIG. 9 is obtained. That is, the circuit board 500 includes two pairs of the linear resistor pattern 501 and the common pattern 511, and the conductor pattern 503 and the auxiliary conductor pattern 507 are linearly formed at one end of the resistor pattern 501. The slider booklet 550 (shown by a one-dot chain line in the figure) is formed, and the conductor pattern 503 and the auxiliary conductor pattern 507 are separately connected to the external extraction terminal 505 and moved to the maximum attenuation amount side. ) Is connected to the auxiliary conductor pattern 507. Between the conductor pattern 503 and the auxiliary conductor pattern 507, a region r where the sliding booklet 550 simultaneously contacts both the conductor pattern 503 and the auxiliary conductor pattern 507 is provided. Further, in order to connect between the conductor pattern 503 and the external extraction terminal 505, a connection pattern 509 is provided at a position protruding outward from the outer side of the conductor pattern 503.

However, in the circuit board 500, when the connection pattern 509 for connecting the conductor pattern 503 and the external lead terminal 505 is provided as described above, the width dimension of the circuit board 500 (in the sliding movement direction of the slider) correspondingly. There is a problem that the slide type electronic component configured using the circuit board 500 cannot be downsized.
Japanese Utility Model Publication No. 55-108706

  The present invention has been made in view of the above points, and an object of the present invention is to provide an electronic component that can obtain a large maximum attenuation and can be miniaturized.

  The invention according to claim 1 of the present application forms a resistor pattern and a common pattern in parallel and connects the conductor pattern to the end of the resistor pattern, and uses the end of the conductor pattern as a terminal electrode portion. Further, in the vicinity of the terminal electrode portion, a circuit board on which an auxiliary conductor pattern arranged along the conductor pattern is formed, a first sliding booklet slidably contacting the common pattern, the resistor pattern and the conductor pattern And a second sliding booklet that is in sliding contact with the auxiliary conductor pattern, wherein the second sliding booklet has at least a slider that contacts the auxiliary conductor pattern at the terminal contact position. An electronic component comprising: a position where the end contact position of the first sliding booklet on the common pattern is farther from the terminal electrode portion than the end contact position of the second sliding booklet on the auxiliary conductor pattern In electronic component, characterized in that the.

  The invention according to claim 2 of the present application is such that the auxiliary conductor pattern and the conductor pattern are arranged closer to the common pattern side closer to the end contact position of the second sliding booklet, 2. The electronic component according to claim 1, wherein a region where the second sliding booklet simultaneously contacts both the pattern and the conductor pattern is provided.

  In the invention according to claim 3 of the present application, the terminal contact position of the first sliding booklet to the common pattern is further away from the terminal electrode portion than the terminal contact position of the second sliding booklet to the auxiliary conductor pattern. The width of the common pattern located in the empty area where the first sliding booklet formed by sliding is not in sliding contact is made narrower than the width of the common pattern in the sliding contact area where the first sliding booklet is in sliding contact. The electronic component according to claim 1 or 2, characterized in that

  According to the first aspect of the present invention, a large maximum attenuation can be obtained by providing the auxiliary conductor pattern. Further, in order to abut the second sliding booklet on the auxiliary conductor pattern at the terminal contact position, the conductor pattern passes through the side of the auxiliary conductor pattern and is connected to the terminal electrode portion. Since the end contact position of the first sliding booklet to the common pattern is set to a position farther from the terminal electrode portion than the end contact position of the second sliding booklet to the auxiliary conductor pattern, the first contact to the common pattern is performed. An empty area where the first sliding booklet does not move from the terminal contact position of the sliding booklet to the terminal electrode portion side is generated, and thus the conductor pattern connected to the terminal electrode portion protrudes into the empty area. Since it can be wired, the overall width dimension (length dimension in the direction orthogonal to the moving direction of the slider) including the common pattern and conductor pattern (and auxiliary conductor pattern), that is, the circuit board The width dimension can be reduced, It can be miniaturized in constructed electronic parts with the circuit board.

  According to the invention described in claim 2, since the second sliding booklet comes into contact with the auxiliary conductive pattern from the conductive pattern as it approaches the terminal contact position, the switching can be performed smoothly.

  According to the third aspect of the present invention, since the width of the common pattern located in the empty region is narrower than the width of the common pattern in the sliding contact region, the common pattern and the conductor pattern (and also the auxiliary conductor pattern) Thus, the overall width dimension including the width of the circuit board, that is, the width dimension of the circuit board can be further reduced, and an electronic component configured using the circuit board can be further reduced in size.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an electronic component (hereinafter referred to as “sliding variable resistor”) 1-1 to which the present invention is applied, and FIG. 2 is an exploded perspective view of the sliding electronic component 1-1. FIG. 3 is a perspective view of the sliding mold 10 with the slider 41 attached as viewed from the lower surface side. As shown in these drawings, the slide type variable resistor 1-1 includes a movable body (hereinafter referred to as “sliding type”) 10, a case 50 that houses the sliding type 10, and a storage portion 55 of the case 50. And a cover 200 for covering.

  The sliding object 10 includes a substantially rectangular main body 20, a lever 40 installed upright in the center of the upper surface of the main body 20, a resilient plate 33 and a sliding plate 37 placed on the main body 20. Two sets of sliders 41, which are electrical functional parts, are attached to the lower surface of the main body 20 (see FIG. 3). The main body 20 is a molded product of a synthetic resin (POM resin is used in this embodiment, but other various synthetic resins may be used), and is formed in a substantially rectangular shape. As shown in FIG. 3, a plurality (four) of small protrusions 31 for attaching the slider 41 are provided on the lower surface of the main body 20.

  The lever 40 is composed of a thin plate-like resin plate or metal plate that is long in the vertical direction, and its lower end is integrated with the main body 20 by press-fitting or insert molding into a recess (not shown) provided on the upper surface of the main body 20. It is fixed to. The elastic plate 33 is formed by forming an elastic plate made of metal (for example, phosphor bronze) into an outer shape to be placed on the upper surface of the main body 20, and has a rectangular shape through which the lever 40 is inserted. An opening (not shown) is provided, and the entirety is curved in an arc shape so as to protrude upward along the slide movement direction A. The sliding plate 37 is formed by forming a thin plate made of synthetic resin (for example, POM resin) into an outer shape to be placed on the upper surface of the main body 20, and a rectangular shape through which the lever 40 is inserted at the center. A shaped opening 39 is provided.

  The slider 41 is made of an elastic metal plate and includes a flat plate-like base portion 43 and two first and second sliding booklets 45 a and 45 b that protrude in parallel from the base portion 43. The base portion 43 is long in the slide movement direction A (in this embodiment, the linear direction), and is provided with rectangular fixing portions 44a and 44b at both ends thereof. A small hole (not shown) for inserting the protrusion 31 is provided. The root portions of the first and second sliding booklets 45a and 45b are connected to the outer periphery of the one fixing portion 44a (the side facing the fixing portion 44b), and the first and second sliding portions are connected at the root portion. The entire booklets 45a and 45b are bent obliquely downward. The direction in which the first and second sliding booklets 45a and 45b protrude is substantially parallel to the sliding movement direction A, and the first and second sliding booklets 45a and 45b have circular arcs in the downward direction in the vicinity of the tips. Abutting portions 46a and 46b are provided. The lengths of the first and second sliding booklets 45a and 45b are different from each other, and the first sliding booklet 45a is longer, whereby the contact portions of the first and second sliding booklets 45a and 45b are arranged. The positions of 46a and 46b are shifted by a predetermined distance toward the slide movement direction A. The first sliding booklet 45a is a booklet that is in sliding contact with the common pattern 85 described below, and the second sliding booklet 45b is a booklet that is in sliding contact with the resistor pattern 83, the conductor pattern 89, and the auxiliary conductor pattern 97 described below. is there. In order to reduce the sliding contact resistance with the resistor pattern 83, in this embodiment, the width of the first sliding booklet 45a (the length in the direction orthogonal to the sliding movement direction A) is larger than that of the second sliding booklet 45b. The width is increased. That is, both the abutting portions 46a and 46b are located at positions where the abutting positions of the resistor pattern 83 and the common pattern 85 of the flexible circuit board 80 described below differ from each other by a predetermined dimension toward the sliding movement direction A of the sliding mold 10. The lengths are different so that The pair of sliders 41 and 41 is formed by inserting the small protrusions 31 provided in the main body 20 into the small holes provided in both the fixing portions 44a and 44b and thermally crimping the tips of the small protrusions 31. , And is fixed to the lower surface of the main body 20 of the sliding mold 10.

  The case 50 is formed by forming a synthetic resin into a rectangular box shape having an open top surface and extending in the slide movement direction A, and further installing a circuit board (hereinafter referred to as a “flexible circuit board”) 80 on the bottom 51 thereof. ing. That is, the case 50 includes a synthetic resin bottom 51 and a pair of side walls 53, 53 erected from the bottom 51 along the sliding movement direction A, so that the main body of the sliding mold 10 is located between the side walls 53, 53. 20 is formed, and the flexible circuit board 80 is insert-molded on the inner bottom surface of the bottom portion 51 so that the upper surface of the flexible circuit board 80 is exposed in the storage portion 55. Further, external lead terminals (hereinafter referred to as “terminal plates”) 150 connected to the respective terminal electrode portions 87, 93, 95 of the flexible circuit board 80 described below project from the lower surfaces of both end portions in the sliding movement direction A of the case 50. Yes. In the lower part of the outer side surface of the side wall 53, a plurality of engaging groove guide grooves 63 having a rectangular groove shape extending in the vertical direction are provided.

  FIG. 4 is a plan view of the flexible circuit board 80. As shown in the figure, the flexible circuit board 80 is a long, substantially rectangular synthetic resin film (in this embodiment, a polyethylene terephthalate (PET) film, but other various synthetic resin films may be used). ) A linear resistor pattern 83 and a common pattern 85 are formed in parallel on the upper surface of 81 in the direction of slide movement A in pairs (two in total) which are electrical function units. ing. The common pattern 85 is substantially linear, and a terminal electrode portion 87 is connected to one end thereof. The resistor pattern 83 is substantially linear, and conductor patterns 89 and 91 for contacting the slider are provided at both ends thereof, and terminal electrode portions 93 and 95 are connected to both ends thereof. Further, on the conductor pattern 89 side, an auxiliary conductor pattern 97 is provided substantially on the same straight line as the conductor pattern 89. In this embodiment, the resistor pattern 83 is formed by applying a resistor paste (screen printing or the like). In this embodiment, the common pattern 85, the terminal electrode portion 87, the conductor patterns 89 and 91, the terminal electrode portions 93 and 95, and the auxiliary conductor pattern 97 are coated with a silver paste (screen printing or the like) and then covered with a carbon paste. Thus, it is formed at the same time in the same process by applying (screen printing or the like). Of course, these various patterns may be formed by using other various methods (for example, techniques such as etching of metal foil and vapor deposition). A portion of the flexible circuit board 80 where the terminal electrode portions 87, 93, 95 are provided is provided with a terminal insertion hole 99 formed of a rectangular small hole penetrating vertically.

  The resistor pattern 83, the conductor pattern 89, the auxiliary conductor pattern 97, and the terminal electrode portion 93 are formed on substantially the same straight line in the slide movement direction A, and the auxiliary conductor pattern 97 is formed on the terminal electrode portion 93. The width of the conductive pattern 89 is tapered toward the common pattern 85 side, and the portion of the conductive pattern 89 that is in the form of a strip (parallel to the conductive pattern 89) is formed in parallel to the side of the auxiliary conductive pattern 97 where the width is increased. A portion connected to the terminal electrode portion 93). As a result, when the contact portion 46b of the second sliding booklet 45b of the slider 41 that has been in contact with the resistor pattern 83 is moved to the auxiliary conductor pattern 97 side, the contact portion 46b first has a resistance. The body pattern 83 abuts on the conductor pattern 89, then abuts on both the conductor pattern 89 and the auxiliary conductor pattern 97 at the same time, and finally at the end abutting position of the abutting portion 46b of the second sliding booklet 45b. It contacts only the auxiliary conductor pattern 97. That is, in this embodiment, the region R in which the second sliding booklet 45b of the slider 41 is in contact with both the auxiliary conductor pattern 97 and the conductor pattern 89 at the same time is the second in contact with only the auxiliary conductor pattern 97. The sliding booklet 45b is provided at a position immediately before the end contact position (indicated by a one-dot chain line in FIG. 7). In other words, the auxiliary conductor pattern 97 and the conductor pattern 89 have an arrangement closer to the common pattern 85 side as they approach the terminal contact position of the second sliding booklet 45b. A region R where the second sliding booklet 45b is in contact with both of the conductor patterns 89 simultaneously is provided. In this embodiment, in order to provide the region R, the width of the auxiliary conductor pattern 97 is formed so as to increase in a taper shape as it approaches the terminal contact position of the second sliding booklet 45b. As shown in the region r, the shape may be a stepped shape, or may be formed in various other shapes.

  5 and 6 are diagrams showing the flexible circuit board 80 and the terminal board 150 which are insert-molded in the case 50. FIG. To manufacture the case 50, first, a flexible circuit board 80 and a terminal board 150 are prepared as shown in FIG. Here, the terminal plate 150 is provided with a terminal contact portion 153 having a substantially rectangular flat plate shape at the tip of the support portion 151 that is in the form of a narrow strip and faces the slide movement direction A, and further connects the support portion 151 of the terminal contact portion 153. The narrow strip-shaped terminal portion 155 protruding from the side is bent downward at a substantially right angle. A base portion (not shown) of each support portion 151 is connected to a single metal plate, whereby the pitch between the terminal portions 155 is the same as the pitch between the terminal insertion holes 99 of the flexible circuit board 80. I am doing so. Then, as shown in FIG. 6, the terminal portions 155 of the terminal plates 150 are inserted into the terminal insertion holes 99 of the flexible circuit board 80, and the terminal contact portions 153 are in contact with the terminal electrode portions 87 and 93. The mold 50 is placed in a mold (not shown), melted resin is injected into a cavity formed in the mold and cured, the mold is removed, and the case 50 protrudes from both end surfaces in the slide movement direction A. When the support portion 151 is cut, the case 50 shown in FIG. 2 is completed. As a result, the bottom 51 is formed on the lower surface side of the flexible circuit board 80, the side walls 53 are formed on both sides along the longitudinal direction of the flexible circuit board 80, and the terminal pressing part 65 that covers the terminal board 150 is formed. The

  As shown in FIG. 2, the cover 200 is formed in a shape that covers the case 50 by bending a metal plate into a box shape with an open bottom surface. That is, the cover 200 bends the side surface portions 203a, b, c, and d protruding from the four sides of the outer periphery of the upper surface portion 201 of the dimension shape covering the storage portion 55 of the case 50 in the downward direction at a substantially right angle, and in the sliding movement direction A. The locking portion 205 protrudes from the position facing the locking portion guide groove 63 of the case 50 on the lower end side of the pair of side surface portions 203a, c along the one side, and toward the sliding movement direction A at the center of the upper surface portion 201. An elongated rectangular lever insertion hole 207 is provided.

  In order to assemble the slide type variable resistor 1-1, first, the slider 41 is attached, and the main body portion 20 of the sliding object 10 to which the elastic plate 33 and the sliding plate 37 are attached is used as the housing portion of the case 50. Store in 55. At this time, the first and second sliding booklets 45a and 45b (the abutting portions 46a and 46b) of the slider 41 attached to the lower surface of the sliding mold 10 are the common pattern 85 and the resistor pattern 83, respectively. Next, they abut at a position shifted by a predetermined distance in the slide movement direction A. Then, the cover 200 is covered on the case 50, and at this time, the respective locking portions 205 of the cover 200 are inserted into the respective locking portion guide grooves 63 of the case 50, and the tip portions of the respective locking portions 205 are placed on the bottom surface of the case 50. Bend to the lower surface side of 51. As a result, the case 50 and the cover 200 are integrally fixed, and the slide type variable resistor 1-1 shown in FIG. 1 is completed.

  When the lever 40 of the sliding mold 10 is moved in the sliding movement direction A, the first and second sliding booklets 45a and 45b (the contact portions 46a and 46b thereof) of the pair of the sliding elements 41 one by one. ) Slide on the common pattern 85 and the resistor pattern 83, respectively, and thereby the resistance value between the terminal boards 150 changes.

  Here, FIG. 7 shows a flexible circuit in which the positions (end contact positions) of the first and second sliding booklets 45a and 45b of the slider 41 when the slider 41 moves to the maximum attenuation side are indicated by a one-dot chain line. 4 is a plan view of a principal part of a substrate 80. As shown mainly in the figure, this slide type electronic component 1-1 includes a resistor pattern 83 and a common pattern 85 formed in parallel, and a conductor pattern 89 connected to the end of the resistor pattern 83. A flexible circuit board 80 having an end portion of the conductor pattern 89 as a terminal electrode portion 93 and an auxiliary conductor pattern 97 disposed along the conductor pattern 89 in the vicinity of the terminal electrode portion 93 and a common pattern 85. And a second sliding booklet 45b slidably in contact with the resistor pattern 83, the conductor pattern 89, and the auxiliary conductor pattern 97. The booklet 45b is a slide type variable resistor 1-1 having at least a slider 41 that contacts the auxiliary conductor pattern 97 at the terminal contact position, The terminal contact position of the first sliding booklet 45a to the mon pattern 85 is more terminal than the terminal contact position of the second sliding booklet 45b to the auxiliary conductor pattern 97 (toward the moving direction of the slider 41). It is configured at a position away from the electrode portion 93. Here, as shown in FIG. 7, the range in which the first sliding booklet 45a slides on the common pattern 85 to the end contact position is called a common sliding contact area A1, and the second sliding booklet 45b is a resistor. A range in which the pattern 83, the conductor pattern 89, and the auxiliary conductor pattern 97 are slid to the end contact position is referred to as a resistor contact area A3, and the end of the first sliding booklet 45a to the common pattern 85 is applied. The first sliding booklet 45a formed by moving the contact position away from the terminal electrode portions 93 and 87 from the terminal contact position of the second sliding booklet 45b to the auxiliary conductor pattern 97 does not slide. The range is referred to as a common empty area A2. Therefore, A1 + A2 = A3. The terminal plate 150 is connected to the terminal electrode portion 93 so that the parallel conductor pattern 89 and the auxiliary conductor pattern 97 are directly connected to the terminal plate 150, respectively.

  Then, the slider 41 attached to the sliding mold 10 slides on the common pattern 85 and the resistor pattern 83 provided on the flexible circuit board 80, and as shown by a one-dot chain line in FIG. When the moving element 41 has moved to the maximum attenuation side, the second sliding booklet 45 b of the sliding element 41 contacts only the auxiliary conductor pattern 97. Since the current does not flow between the auxiliary conductor pattern 97 and the terminal plate 150 and there is no voltage drop as described above, the attenuation amount is only the resistance value RT of the connection portion between the terminal electrode portion 93 and the terminal plate 150. Determined. That is, assuming that the total resistance value of the resistor pattern 83 is RA, the resistance value of the conductor pattern 89 is RR, and the resistance value of the connection portion between the terminal electrode portion 93 and the terminal plate 150 is RT, the maximum attenuation is (RT) / Since (RA + RR + RT) and RT << (RA + RR + RT), a large maximum attenuation can be obtained. In this embodiment, an example in which the terminal plate 150 is attached to the terminal electrode portion 93 is shown. However, in some cases, the terminal plate 150 is not attached, and the present invention is applied to an electronic component having a structure in which the terminal electrode portion 93 is exposed as it is. You can also.

  Further, as described above, in order to bring the second sliding booklet 45b into contact with the auxiliary conductor pattern 97 at the terminal contact position, the conductor pattern 89 passes through the side of the auxiliary conductor pattern 97 and passes through the terminal electrode portion. 93 and the terminal board 150, the terminal contact position of the first sliding booklet 45a with respect to the common pattern 85 is set to the terminal contact position of the second sliding booklet 45b with respect to the auxiliary conductor pattern 97. Since the position is farther from the terminal electrode portion 93 toward the moving direction of the slider 41 (sliding moving direction A) than the terminal electrode portion from the terminal contact position of the first sliding booklet 45a to the common pattern 85. 93 and a terminal plate 150 side portion, the first sliding booklet 45a does not move and an empty area A2 is generated. Overhang Therefore, the entire width including the common pattern 85 and the conductor pattern 89 (and also the auxiliary conductor pattern 97) (the length dimension in the direction perpendicular to the moving direction of the slider 41) is included. That is, the width dimension of the flexible circuit board 80 can be reduced, and the sliding electronic component 1-1 configured using the flexible circuit board 80 can be reduced in size.

  Further, in this embodiment, the auxiliary conductor pattern 97 and the conductor pattern 89 are arranged closer to the common pattern 85 side closer to the end contact position of the second sliding booklet 45b, and the auxiliary conductor pattern 97 is provided. Since the region R where the second sliding booklet 45b abuts at the same time is provided in both the conductor pattern 89 and the conductor pattern 89, the auxiliary conductor is gradually moved away from the conductor pattern 89 as the second sliding booklet 45b approaches the terminal contact position. Since it comes into contact with the pattern 97, the switching can be performed smoothly.

  FIG. 8 is a plan view of the main part of the flexible circuit board 80-2 according to another embodiment of the present invention (the same as FIG. 7). In the flexible circuit board 80-2 shown in the figure, the same reference numerals are given to the same or corresponding parts as those of the flexible circuit board 80 used in the embodiment shown in FIGS. Note that matters other than those described below are the same as those in the embodiment shown in FIGS. The flexible circuit board 80-2 is different from the flexible circuit board 80 in that the end contact position of the first sliding booklet 45a with respect to the common pattern 85 is set to the position of the second sliding booklet 45b with respect to the auxiliary conductor pattern 97. The width W2 of the common pattern 85 located in the empty area A2 where the first sliding booklet 45a formed by being positioned farther from the terminal electrode portions 87 and 93 than the terminal contact position is not slidably contacted is set to the first sliding position. This is a point narrower than the width W1 of the common pattern 85 in the sliding contact area A1 where the booklet 45a is in sliding contact. As a result, even if the conductor pattern 89 protrudes toward the common pattern 85 in the empty area A2, the common pattern 85 can be formed in a straight line shape (or a shape close to a straight line). That is, since the width W2 of the common pattern 85 located in the empty area A2 is made narrower than the width W1 of the common pattern 85 in the sliding area A1, the common pattern 85 and the conductor pattern 89 (and also the auxiliary conductor pattern 97) are changed. The entire width dimension including the width of the flexible circuit board 80 can be further reduced, and the sliding electronic component configured using the flexible circuit board 80 can be further reduced in size. In the embodiment shown in FIGS. 1 to 7, the width W2 of the common pattern 85 located in the empty area A2 is slightly smaller than the width W1 of the common pattern 85 in the sliding area A1, and the same effect is produced. ing.

  Strictly speaking, the part where the width of the flexible circuit boards 80 and 80-2 can be narrowed is not the whole of the flexible circuit boards 80 and 80-2 but mainly the part near the empty area A2. That is, in the circuit board 500 shown in FIG. 9, the sliding booklets 550 are arranged in a line (in a direction orthogonal to the sliding movement direction), so that the connection pattern 509 extends in the width direction of the circuit board 500 and is installed. However, this is not necessary in each embodiment of the present application, and accordingly, the width of the circuit board at that portion can be reduced.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. It should be noted that any shape, structure, or material not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited. For example, various components (each component) such as the slider, resistor pattern, common pattern, conductor pattern, terminal electrode, external lead terminal, auxiliary conductor pattern, circuit board, etc. used in the above embodiment Can be modified. Further, the present invention can be applied not only to the sliding electronic component but also to various other electronic components such as a rotating electronic component. Further, the number of sliding booklets 45a and 45b is not limited to two, but may be one or a plurality of other booklets. Further, in order to improve the contact reliability, a cut booklet provided in one sliding booklet toward the sliding movement direction. The number of notches may be one or more.

It is a perspective view of the slide type variable resistor 1-1. It is a disassembled perspective view of the slide-type variable resistor 1-1. It is the perspective view which looked at the sliding type thing 10 which attached the slider 45 from the back surface side. 3 is a plan view of a flexible circuit board 80. FIG. FIG. 10 is an explanatory diagram of an insert molding method of the flexible circuit board 80 and the terminal plate 150 to the case 50. FIG. 10 is an explanatory diagram of an insert molding method of the flexible circuit board 80 and the terminal plate 150 to the case 50. The principal part of the flexible circuit board 80 in which the positions (terminal contact positions) of the first and second sliding booklets 45a and 45b of the slider 41 when the slider 41 moves to the maximum attenuation side are indicated by alternate long and short dash lines. It is a top view. It is a principal part top view of the flexible circuit board 80-2. 3 is a plan view of a main part of a circuit board 500.

Explanation of symbols

1-1 Sliding variable resistors (sliding electronic components, electronic components)
10 Sliding type (moving body)
41 Slider 45a First sliding booklet 45b Second sliding booklet 50 Case 80 Flexible circuit board (circuit board)
83 Resistor pattern 85 Common pattern 87, 93, 95 Terminal electrode part 89, 91 Conductor pattern 97 Auxiliary conductor pattern A1 Sliding contact area A2 Empty area A3 Sliding contact area 150 Terminal board (external lead terminal)
200 Cover A Slide moving direction 80-2 Flexible circuit board

Claims (3)

A resistor pattern and a common pattern are formed in parallel, and a conductor pattern is connected to an end portion of the resistor pattern. The end portion of the conductor pattern is used as a terminal electrode portion, and the conductive pattern is further adjacent to the terminal electrode portion. A circuit board having an auxiliary conductor pattern disposed along the body pattern;
A slider having a first sliding booklet that is in sliding contact with the common pattern, and a second sliding booklet that is in sliding contact with the resistor pattern, the conductor pattern, and the auxiliary conductor pattern. An electronic component comprising at least a slider that comes into contact with the auxiliary conductor pattern at a terminal contact position of the booklet,
An electronic component characterized in that the end contact position of the first sliding booklet to the common pattern is positioned farther from the terminal electrode portion than the end contact position of the second sliding booklet to the auxiliary conductor pattern.   The auxiliary conductor pattern and the conductor pattern are arranged closer to the common pattern side as the end contact position of the second sliding booklet is closer, and the auxiliary conductor pattern and the conductor pattern are simultaneously placed on both the auxiliary conductor pattern and the conductor pattern. The electronic component according to claim 1, wherein an area where the two sliding booklets abut is provided.   The first contact formed at the end of the first sliding booklet on the common pattern is located farther from the terminal electrode portion than the end of the second sliding booklet on the auxiliary conductor pattern. The width of the common pattern located in the empty area where the sliding booklet is not in sliding contact is made narrower than the width of the common pattern in the sliding contact area where the first sliding booklet is in sliding contact. Electronic components.

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