JP6522480B2 - Sliding electronic parts - Google Patents

Description

  The present invention relates to a sliding electronic component.

  Conventionally, in a slide type electronic component, for example, as in a slide type electronic component (100) shown in FIGS. 11 to 14 of Patent Document 1, an insert is made in a case (60) in which a flexible circuit board (40) is curved. At this time, the sliding contact pattern (43, 45) formed on the surface of the flexible circuit board (40) is exposed to the surface side of the case (60), and the slider is further moved onto the case (60). There is one in which a movable body (130) attached with (150) is slidably attached. When the movable body (130) is slid, the slider (150) slides on the sliding contact pattern (43, 45), and the electrical output thereof changes.

  Here, the attachment of the movable body (130) to the case (60) is achieved by providing an arm portion (131) projecting in a L-shape from the left and right sides of the movable body (130) downward. This is done by attaching (131) to be engaged with the back surface of the case (60) via the left and right outer wall surfaces of the case (60).

JP 2011-135005 A

  By the way, when the flexible circuit board (40) is insert-molded in the case (60), the cavity formed by the mold (10, 30) as shown in FIG. The flexible circuit board (40) is accommodated in (C1), and at that time, the movement of the flexible circuit board (40) in the width direction is prevented by the positioning pins (15) projecting into the cavity (C1). Then, small holes are vertically penetrated in the vicinity of the left and right side walls of the case (60) after molding by the positioning pins (15) (see FIG. 12 of Patent Document 1). The left and right sides of the sliding contact pattern (43, 45) are formed in two places, two on the left and two on the outer side.

  In the above-mentioned conventional slide type electronic component (100), when the reduction of the width dimension is required, it is necessary to reduce the width dimension of the case (60) and the width dimension of the movable body (130). In order to reduce the width of the case (60), the width of the insert-molded flexible circuit board (40) is reduced, and at the same time, the width of the case (60) is set to the left and right sides of the flexible circuit board (40). It is necessary to reduce the size until it becomes approximately the same position.

  Then, as described above, when the width dimension of the case (60) is reduced to substantially the same position as the left and right sides of the flexible circuit board (40), a part of the small hole formed by the positioning pin (15) The arc-shaped recess (corresponding to the positioning recess 151 described below) is exposed on the outer wall surfaces of the left and right side walls of the case (60).

  On the other hand, the movable body (130) contacts the left and right outer wall surfaces of the case (60) and slides while positioning in the width direction. There has been a problem that the moving body (130) is caught, which deteriorates the operability of the moving body (130).

  The present invention has been made in view of the above-described point, and the object thereof is to slide the movable member smoothly even if the concave portion or the like is formed on the left and right outer wall surfaces of the case for downsizing etc. An object of the present invention is to provide a sliding electronic component that can be moved.

According to the present invention, there is provided a case provided with a circuit board, a bottom portion covering the back surface of the circuit board, and side walls erected from both left and right sides of the circuit board, the case being installed on the case By having an arm portion which descends along the outer wall surface of both side walls and engages with and slides on the back surface of the case, a movable body which is vertically positioned with respect to the case and which is slidably attached thereto A sliding type electronic component provided between the movable body and the circuit board and including detection means for changing detection output according to slide movement of the movable body, wherein the movable body has both left and right sides of the case There is provided a positioning portion engaged with the opposing inner wall surface of the wall to perform positioning in the width direction, and the abutment between the arm portion and the outer wall surfaces of both left and right side walls of the case is prevented. It is characterized by the formation of the gap.
Positioning of the movable body in the width direction (left and right direction) is performed by the positioning part, positioning in the vertical direction is performed by engagement between the arm and the back of the case, and the arm does not abut the outer wall surface of both left and right side walls Thus, for the purpose of downsizing or the like, the sliding movement of the movable body can be smoothly performed even in the case where a recess or the like is formed on the outer wall surface of the case.

Further, according to the present invention, the circuit board is insert-molded in a case, and on outer wall surfaces of left and right side walls of the case, marks of positioning pins for positioning the circuit board when insert-molding the circuit board It is characterized in that a positioning recess is formed.
In order to miniaturize the case, even if positioning recesses, which become marks of positioning pins for positioning the circuit substrate when insert-molding the circuit substrate, are exposed on the outer wall surfaces of both left and right side walls of the case, the movable member is this positioning recess It is possible to slide the moving body smoothly without being caught by the That is, downsizing of the case and smooth movement of the moving body can be simultaneously achieved.

Further, according to the present invention, an arm contact surface provided at an inner position beyond the end face of the positioning recess which appears on the case back surface at a position where the arm portion of the movable body engages and slides on the case back surface. It is characterized by being.
Even if the positioning recess appears on the back surface of the case, the arm portion abuts and slides on the arm portion abutting surface at the inner position, so that the movable body can slide smoothly.

Further, the present invention is characterized in that the arm contact surface of the case is a surface projecting downward with a level difference with respect to the end face of the positioning recess which appears on the rear surface of the case.
By this, it is possible to prevent the contact of the arm with the positioning recess more reliably.

  According to the present invention, for downsizing and the like, the movable body can be smoothly slid and moved even in the case where a recess or the like is formed on the left and right outer wall surfaces of the case.

It is a schematic sectional drawing of the slide type electronic component 1-1 which shows the basic composition of this invention simply. It is a perspective view of sliding type variable resistor 1-2 concerning a concrete embodiment. It is the perspective view which looked at sliding type variable resistor 1-2 from lower side. It is a principal part expansion perspective view of slide type variable resistor 1-2 seen from the lower side. It is a schematic sectional drawing of the AA line vicinity of FIG. FIG. 7 is an enlarged perspective view of a moving body 170. It is the expansion perspective view which looked at moving object 170 and slider 190 from the bottom side. FIG. 2 is a plan view of the flexible circuit board 100. FIG. 21 is an explanatory view of a method of manufacturing the circuit board 150 with a case. FIG. 21 is an explanatory view of a method of manufacturing the circuit board 150 with a case.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic cross-sectional view of a sliding electronic component (hereinafter referred to as a “sliding variable resistor”) 1-1 simply showing the basic configuration of the present invention. As shown in the figure, the slide type variable resistor 1-1 comprises a circuit board (hereinafter referred to as "flexible circuit board") 10, a bottom 31 covering the back surface of the flexible circuit board 10, and both left and right sides of the flexible circuit board 10. Along the outer wall surfaces 33a, 33a of the case 30 provided with the side walls 33, 33 erected from the main body 61 installed on the case 30 and the left and right side walls 33, 33 of the case 30; A moving body 60 having a pair of arm portions 63, 63 which descends and engages with and slides on the back surface of the case 30, a resistor pattern 11 and a current collecting pattern 13 formed on the flexible circuit board 10, and And a slider 90 attached to the lower surface of the main body portion 61 of the movable body 60 and in contact with the resistor pattern 11 and the current collecting pattern 13 at the same time. That. Both the resistor pattern 11 and the current collection pattern 13 are sliding contact patterns. The resistor pattern 11, the current collecting pattern 13, and the slider 90 constitute a detection unit that changes the detection output according to the slide movement of the movable body 60. The slide type variable resistor 1-1 is elongated toward the front in the drawing, and the movable body 60 slides on the case 30 in the longitudinal direction. In the following description, “upper” refers to the direction in which the moving body 60 is viewed from the case 30, and “lower” refers to the opposite direction. The “sliding direction” refers to the direction in which the movable body 60 moves, and the direction orthogonal to the sliding direction is referred to as the “width direction”.

  On the lower surface of the main body portion 61 of the movable body 60, positioning portions 65 are provided which engage with the opposing inner wall surfaces 33b, 33b of the left and right side walls 33, 33 of the case 30 to position in the width direction. Thus, gaps 35, 35 for preventing contact between the arm portions 63, 63 and the outer wall surfaces 33a, 33a of the case 30 are reliably formed.

  The flexible circuit board 10 is insert-molded in the case 30, and the outer wall surfaces 33a and 33a of the case 30 become marks of positioning pins for positioning the flexible circuit board 10 when the flexible circuit board 10 is insert-molded. Positioning recesses 37, 37 are formed. The positioning recesses 37, 37 are formed in a straight, semicircular concave shape in the vertical direction. At the inner position beyond the end faces of the positioning recesses 37, 37 appearing on the back surface of the case 30, projecting parts 39, 39 are provided with a level difference from the end faces of the positioning recesses 37, 37. The lower end surfaces thereof are referred to as arm portion contact surfaces 41, 41. The upper surfaces of the tip portions of the arm portions 63, 63 of the movable body 60 are in contact with the arm portion abutting surfaces 41, 41. Since the end faces of the positioning recesses 37, 37 also appear on the upper end surfaces of the left and right side walls 33, 33, the positioning recess 37 is just in case that the lower surface of the main body 61 of the movable body 60 does not abut this part. , 37, and the projecting portions 43, 43 are provided with a step on the inner side of the lower surface of the main body 61 opposite to the end face of the main body 61 so as to project downward. As a result, a slight gap is created between the lower surfaces of the projecting portions 43, 43 and the upper end surfaces of the left and right side walls 33, 33. Therefore, the lower surfaces of the projecting portions 43, 43 Even if it is located on the end face of the positioning recess 37, it does not touch it, and the smooth movement of the moving body 60 is not inhibited (this point is the same in the slide type variable resistor 1-2 described later).

  Then, when the movable body 60 is slid in the longitudinal direction with respect to the case 30, the slider 90 slides on the resistor pattern 11 and the current collecting pattern 13, and the detection output thereof changes.

  At this time, positioning of the movable body 60 in the width direction (left and right direction) is performed by the positioning portion 65, and positioning in the vertical direction is performed by contact between the arm portion 63 and the back surface of the case 30 (arm portion contact surface 41). In addition, since the arm portion 63 does not contact the outer wall surface 33a of the left and right side walls 33 by the gap 35, the flexible circuit board 10 is positioned when the flexible circuit board 10 is insert-molded on the outer wall surface 33a of the case 30. Even if the positioning recess 37 which is the mark of the positioning pin to be performed is exposed, the moving body 60 does not get caught in the positioning recess 37, and the moving body 60 can slide smoothly. The positioning recess 37 is formed by miniaturizing the case 30. That is, downsizing of the case 30 and smooth sliding movement of the movable body 60 can be simultaneously achieved. Further, in the slide type variable resistor 1-1, the positioning recess 37 appears on the back surface of the case 30, but the arm 63 is abutted and slid on the arm contact surface 41 at the inner position thereof. The portion 63 does not touch the end of the positioning recess 37, and the moving body 60 can be slid smoothly from this point as well.

  FIG. 2 is a perspective view of a slide variable resistor 1-2 according to a specific embodiment of the slide variable resistor 1-1, and FIG. 3 is a perspective view of the slide variable resistor 1-2 as viewed from below. 4 is an enlarged perspective view of the main part of the slide type variable resistor 1-2 seen from the lower side, FIG. 5 is a schematic cross-sectional view around the line AA of FIG. 2, FIG. 6 is an enlarged perspective view of the movable body 170 FIG. 7 is an enlarged perspective view of the movable body 170 and the slider 190 as viewed from below, and FIG. 8 is a plan view of the flexible circuit board 100. In addition, the cross section of FIG. 5 represents the contact cross section suitably different so that the part of the positioning part 183 of the moving body 170 mentioned later and the part of the arm part 173 may become a cross section. Further, FIG. 8 shows a flat surface of the flexible circuit board 100 in a curved shape which is insert-molded in a case 130 described below, and in the case of the flexible circuit board 100 alone, the whole is not curved but is in a planar state. In other words, in the case of FIG.

  As shown in these figures, the slide type variable resistor 1-2 is a case-mounted circuit board 150 in which the flexible circuit board 100 is insert-molded in a case 130, and a movable body slidably attached to the case-mounted circuit board 150. It comprises 170 and the slider 190 (refer FIG. 7) attached to the lower surface of the mobile body 170, and is comprised.

  The flexible circuit board 100 shown in FIG. 8 has a resistor pattern 113 and a current collection pattern directed in the longitudinal direction on the surface of an insulating substrate 111 formed by forming a flexible synthetic resin film in a strip shape (long rectangular shape). The two patterns 115 are formed in parallel, and the first and second connection patterns 117 and 119 are respectively connected to both ends of the resistor pattern 113, and a third connection pattern is connected to one end of the current collection pattern 115. The first, second, and third connection patterns 117, 119, and 125 are drawn out to the side of the resistor pattern 113 to which the first connection pattern 117 is connected. The second connection pattern 119 is a flexible circuit board through the through holes 121 provided in the vicinity of the position where this pattern is connected to the resistor pattern 113. The second through provided near the position where the first connection pattern 117 of the resistor pattern 113 is connected after being drawn to the back surface of 00 and further drawn out toward the first connection pattern 117 on the back surface. It is drawn out to the surface side of the flexible circuit board 100 by the holes 123. Further, in the flexible circuit board 100, pin locking portions 127 each consisting of a recess for positioning pin locking, which will be described later, are formed at predetermined positions (four positions each) on the left and right sides.

  Next, the circuit board 150 with a case shown in FIG. 2, FIG. 3 and FIG. 4 is the back side of the flexible circuit board 100 in the curved state where the resistor pattern 113 and the current collecting pattern 115 are formed. And is formed by insert molding in the case 130 (the bottom portion 131 and the left and right side walls 133) so as to cover the outer periphery. The width dimension L4 (see FIG. 5) between the opposing inner wall surfaces 133b of the left and right side walls 133 of the case 130 is constant in the sliding direction.

  9 and 10 are explanatory views of a method of manufacturing the circuit board 150 with a case. As shown in FIG. 10, in order to manufacture the circuit board 150 with a case, the flexible circuit board 100 is formed in the cavity C1 in the shape of the case 130 formed between the first mold 300 and the second mold 350. At that time, the surface of the flexible circuit board 100 is curved and brought into contact with the inner surface of the portion to be the cavity C1 of the first mold 300. At this time, the flexible circuit board 100 shown in FIG. 9 has positioning pins 301 projecting from the first mold 300 four pairs (one pair in FIG. 10 but four pairs in each side as shown in FIG. 9). The flexible circuit board 100 is positioned in the width direction by inserting and locking the pin locking portions 127 in the above. Here, a dotted line C1 shown in FIG. 9 indicates the shape of the cavity C1 viewed from the planar direction. As can be seen from the dotted line C1, the dimension in the width direction of the cavity C1 is substantially the same as the dimension in the width direction of the flexible circuit board 100, thereby reducing the width dimension of the case 130. Further, by thus reducing the width dimension of the cavity C1, approximately half of the positioning pin 301 will be exposed to the inside of the cavity C1.

  Then, the molten resin is pressed from the resin injection hole 351 provided in the second mold 350 to fill the inside of the cavity C1, and after cooling and solidification, the first and second molds 300 and 350 are removed, a circuit with a case The substrate 150 is completed.

  In the completed circuit board 150 with a case, as shown in FIG. 4 etc., at the inner position beyond the end face of the positioning recess 151, 151 appearing on the back of the case 130, a step is made with respect to the end face of the positioning recess 151, 151. The projections 153 and 153 are provided to project downward and extend in a rail shape in the sliding direction, and the lower surfaces of the projections 153 and 155 are used as the arm contact surfaces 155 and 155. The sliding contact portion 181 on the top surface of the tip end portion of the arm portion 173, 173 of the moving body 170 described below abuts on the arm portion abutting surface 155, 155.

  Further, in the cased circuit board 150 shown in FIGS. 2 to 4, the positioning concave portion 151 in which the inner surface is formed in an arc shape linearly in the vertical direction four on the left and right sides is the above-mentioned FIG. The positioning pin 301 shown in FIG. That is, when the width dimension of the cavity C1 is reduced in order to reduce the width dimension of the case 130, a part of the positioning pin 301 is exposed in the cavity C1. The positioning recess 151 is formed on the outer wall surface 133a.

  Next, as shown in FIG. 7, the slider 190 is made of an elastic metal plate, and projects two slide booklets 193 from one side of the outer periphery of the substantially rectangular flat base 191 to make their root portions 180 ° It is structured to be folded. The base 191 is provided with a mounting small hole 195.

  The movable body 170 is a molded product of synthetic resin, and is configured by providing two substantially L-shaped arm portions 173 projecting downward at the lower left and right sides of the substantially rectangular main body portion 171. The lower surface of the main body portion 171 is a slider mounting surface 175, and a mounting portion 177 formed of a small protrusion is provided in a protruding manner on the slider mounting surface 175. The distal end portion of each arm portion 173 is a locking portion 179 which protrudes in an inward direction orthogonal to the sliding direction, and the upper surface of each locking portion 179 is curved in a convex shape with a sliding contact portion 181 It has become. Further, as shown in FIG. 5, the separation distance L1 between the left and right arm portions 173 is formed larger than the width dimension L2 between the opposing outer wall surfaces 133a of the left and right side walls 133 of the case 130 by a predetermined dimension. (L1> L2).

  From lower portions of the front and rear sides 171a and 171b in the sliding direction of the main body portion 171 of the movable body 170, substantially rectangular positioning portions 183 extending a predetermined length in the width direction are provided to protrude. The length dimension L3 (see FIG. 5) in the width direction of the positioning portion 183 is formed to be substantially the same as the width dimension L4 between the opposing inner wall surfaces 133b of the case 130 (L34L4).

  In order to assemble the slide type variable resistor 1-2, first, the base 191 of the slider 190 is placed on the slider mounting surface 175 of the movable body 170, and at this time, the mounting portion 177 of the movable body 170 is slid It is inserted into the mounting small hole 195 of the child 190, and its tip is attached by heat caulking. Then, by inserting the left and right side walls 133 of the circuit board 150 with a case between the main body portion 171 of the moving body 170 to which the slider 190 is attached and the locking portion 179, the mobile body 170 is inserted. When slidably mounted on the substrate 150, the slide type variable resistor 1-2 is completed.

  In the slide type variable resistor 1-2 assembled as described above, the slide booklet 193 of the slider 190 slides on the resistor pattern 113 and the current collection pattern 115 when the moving member 170 slides. Thus, the output between the first, second and third connection patterns 117, 119 and 125 changes.

  At this time, although the slide type variable resistor 1-1 shown in FIG. 1 is also described, as shown in FIG. 5, positioning of the moving body 170 in the width direction is performed by Positioning of the direction is performed by the contact between the arm portion 173 (locking portion 179) provided in two pairs in the sliding direction and the back surface (arm portion contact surface 155) of the case 130, and all the arm portions 173 have gaps. It has a structure which does not contact | abut to the outer wall surface 133a of the left-right both-sides wall 133 by 135. FIG. Therefore, even if the positioning recess 151 is exposed on the outer wall surface 133a of the case 130 for downsizing the case 130, the moving body 170 does not get caught in the positioning recess 151, and the moving body 170 slides smoothly. It can be done. That is, downsizing of the case 130 and smooth sliding movement of the movable body 170 can be simultaneously achieved. Further, in the slide type variable resistor 1-2, although the positioning recess 151 also appears on the back surface of the case 130, the sliding contact portion 181 of the arm portion 173 is in contact with the arm portion contact surface 155 at the inner position thereof. Since it slides, the arm portion 173 can slide smoothly without touching the end of the positioning recess 151. In particular, in the slide type variable resistor 1-2, the arm portion abutting surface 155 of the case 130 is a surface projecting downward with a level difference from the end surface of the positioning recess 151 appearing on the back surface of the case 130. The contact of the contact portion 181 with the positioning recess 151 can be more reliably prevented.

  Although the arc direction is shown as the slide movement direction in the above embodiment, the slide movement direction is a concept including various directions such as a linear direction and other curvilinear directions.

  Alternatively, the sliding contact portion 181 may be in contact with the arm portion contact surface 155 provided on the same plane on the same plane where the protrusion 153 is not provided, that is, the end face of the positioning recess 151 is not provided. Further, instead of providing the projecting portion 153 (or together with the projecting portion 153), the end surface of the positioning recess 151 is more reliably avoided by bending the tip end of the locking portion 179 upward to make the upper end surface a sliding contact portion. It may be configured as follows.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications may be made within the scope of the claims and the technical idea described in the specification and the drawings. It is possible. It is within the scope of the technical idea of the present invention as far as the functions and effects of the present invention can be obtained regardless of any shape, structure or material not described in the specification and drawings directly. For example, in the above-mentioned example, although the flexible circuit board was used as a circuit board, the present invention is applicable even if it is a hard board. Although the circuit board is insert-molded in the case in the above example, the present invention can be applied even when the insert-molding is not performed. In the above example, the case where the positioning recess is formed on the outer wall surface of the case in order to miniaturize the case has been described, but in the case where unevenness or the like other than the positioning recess is formed on the outer wall surface of the case According to the invention, too, it can be configured not to touch it. In the above embodiment, an example is shown in which the slide type variable resistor is configured using the resistor pattern and the current collection pattern, but other various slide contact patterns such as a slide type switch configured using a switch pattern are used. Thus, various slide-type electronic components may be configured. In the above example, the detection means is configured by the slider and the sliding contact pattern, but it is installed between the moving body and the circuit board and the detection output (electrical, magnetic, optical output according to the sliding movement of the moving body Any other configuration of detection means may be used as long as it changes etc.). Needless to say, various changes can be made to the position, number, and shape of the positioning portion and the arm portion.

  Moreover, the embodiments shown in the above-mentioned drawings can be combined with each other as long as there is no contradiction in the purpose, configuration and the like. Moreover, the description content of each figure may become an independent embodiment, and embodiment of this invention is not limited to one embodiment which combined each figure.

1-1, 1-2 slide type variable resistor (slide type electronic parts)
10, 100 flexible circuit board (circuit board)
11, 113 Resistor pattern (sliding contact pattern, detection means)
13, 115 Current collection pattern (sliding contact pattern, detection means)
30, 130 Case 31, 131 Bottom part 33, 133 Side wall 33a, 133a Outer wall surface 33b, 133b Inner wall surface 35, 135 Gap 37, 151 Positioning recess 41, 155 Arm contact surface 60, 170 Moving body 61, 171 Main body 63 , 173 Arm portion 65, 183 Positioning portion 90, 190 Slider (detection means)

Claims (4)

Circuit board,
A case provided with a bottom portion covering the back surface of the circuit board and side walls erected from both left and right sides of the circuit board;
Positioning in the vertical direction with respect to the case by having an arm portion which is installed on the case and which descends along the outer wall surfaces of both left and right side walls of the case and engages with and slides on the back surface of the case. At the same time as the moving body attached to slide freely
Detection means disposed between the movable body and the circuit board and changing a detection output according to slide movement of the movable body;
In a sliding electronic component comprising
The movable body is provided with positioning portions engaged with opposing inner wall surfaces of the left and right side walls of the case to perform positioning in the width direction, and between the arm portion and the outer wall surfaces of the left and right side walls of the case. A slide-type electronic component characterized in that a gap is formed to prevent contact between the two. A sliding electronic component according to claim 1, wherein
The circuit board is insert-molded in a case,
A slide type electronic component, wherein positioning concave portions which become marks of positioning pins for positioning the circuit board when the circuit board is insert-molded are formed on outer wall surfaces of left and right side walls of the case. A sliding electronic component according to claim 2, wherein
The point at which the arm portion of the movable body engages and slides on the back of the case is an arm contact surface provided at an inner position beyond the end face of the positioning recess which appears on the back of the case. Slide-type electronic components. A sliding electronic component according to claim 3, wherein
A sliding electronic component characterized in that the arm contact surface of the case is a surface projecting downward with a level difference with respect to the end face of the positioning recess which appears on the rear surface of the case.

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