JP2006140092A - Static electricity invasion prevention mechanism of electronic component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a static electricity invasion prevention mechanism of an electronic component in which, even if operated by a finger or the like which is charged, noises due to static electricity does not enter into its electric circuit. <P>SOLUTION: The electronic component is equipped with a case 130 having an opening part 131 and an electronic component main part (made of a first circuit board 20 or the like provided with a sliding molding 50, a slider 70, and a switch pattern 23) which is installed at the lower part of the case 130 and is operated from the upper side of the case 130 through the opening part 131. A grounding plate 80 having conductivity which makes enter the static electricity invading from the opening part 131 of the case 130 is fitted so as to cover the upper face of the sliding molding 50. A conductor pattern 33 is provided which, by contacting a sliding part 85 (elastic sliding part 87) of the grounding plate 80, leads out the static electricity entered from the upper part of the case 130 to the grounding plate 80 through the opening part 131 from the grounding plate 80. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a static electricity intrusion prevention mechanism for an electronic component suitable for removing static electricity entering the electronic component.

  For example, as shown in FIG. 1 of Patent Document 1, a conventional sliding electronic component is provided with an operation knob (40) at the upper part of a case (20), and a sliding type object (50) at the lower part of the case (20). And an electronic component main body composed of a slider (59) and a flexible substrate (63), and an operation knob (40) and a sliding-type object (through a through hole (21) provided in the case (20) ( 50). The sliding electronic component includes a stopper knob (30) protruding upward from a through hole (41) provided in the center of the operation knob (40), and a coil spring (60) for pushing it upward. A locking mechanism is installed.

  Then, the slide type electronic component unlocks the lock mechanism by depressing the stopper knob (30), slides the slide type object (50) freely slidable with respect to the case (20), As a result, the slider (59) slides on the switch pattern of the flexible substrate (63) to change its electrical output.

However, in the sliding electronic component, when the finger touching the operation knob (40) or the stopper knob (30) is charged, this static electricity is applied to the through hole (41) of the operation knob (40) and the stopper knob (40). 30), the clearance between the outer peripheral lower surface of the operation knob (40) and the upper surface of the case (20), etc., from the through hole (21) of the case (20) to the slider (59) or flexible There is a possibility that an electronic circuit having the slide type electronic component attached thereto may be malfunctioned by being incident on a switch pattern on the substrate (63) and causing noise in an electric circuit. In particular, when the through hole (21) for the stopper mechanism is provided as in the above slide type electronic component, static electricity enters through a gap between the outer peripheral lower surface of the operation knob (40) and the upper surface of the case (20). Since the creepage distance through which static electricity enters through the through hole (41) of the operation knob (40) is shorter than the creepage distance, static electricity can easily enter accordingly, resulting in a problem.
JP-A-8-329775

  The present invention has been made in view of the above points, and an object of the present invention is to provide an electrostatic intrusion prevention mechanism for an electronic component in which noise caused by static electricity does not enter the electric circuit even when operated with a charged finger or the like. There is to do.

  The invention according to claim 1 of the present application is an electronic component case having an opening, and an electronic component main body that is installed at a lower portion of the electronic component case and is operated from the upper side of the electronic component case through the opening. In the electronic component comprising: a ground plate having conductivity to which static electricity entering through the opening of the electronic component case is incident is attached to the electronic component main body portion, and the approach to or contact with the ground plate. In the electronic component static electricity intrusion prevention mechanism, a static electricity deriving member for deriving static electricity that has entered the ground plate from the ground plate is provided.

  The invention according to claim 2 of the present application is characterized in that the electronic component main body is moved from an upper side of the case and moved, and an electric functional unit that changes its electric output by movement of the movable object. 2. The electronic component intrusion prevention mechanism according to claim 1, wherein the grounding plate is attached so as to cover an upper surface of the movable object.

  According to a third aspect of the present invention, the static electricity deriving member is fixed to a stationary member adjacent to the movable object, and the static electricity is transferred to the ground plate as the movable object moves. The electronic component intrusion prevention mechanism for an electronic component according to claim 2, wherein a sliding contact portion that slides on the lead member is provided.

  The invention according to claim 4 of the present application is the mechanism for preventing electrostatic intrusion of electronic parts according to claim 2 or 3, wherein the static electricity deriving member is a conductor pattern formed on a substrate.

  According to the first aspect of the present invention, since the ground plate attached to the electronic component main body and the static electricity deriving member for deriving the static electricity that has entered the ground plate from the ground plate are provided, the opening of the electronic component case It is possible to ground all static electricity entering from the ground plate toward the static electricity lead-out member. Therefore, even if this electronic component is operated with a charged finger or the like, the static electricity can be effectively removed, and noise and the like due to static electricity can be reliably prevented from entering the electric circuit of the electronic component.

  According to the second aspect of the present invention, since the ground plate is attached so as to cover the upper surface of the movable object, the ground plate can be installed immediately below the opening of the case, and therefore enters from the opening. Static electricity can be reliably incident on the ground plate.

  According to the third aspect of the present invention, since the ground plate is provided with the sliding contact portion that slides on the static electricity deriving member, the ground plate is always brought into contact with the static electricity deriving member even when the moving member is moved. be able to.

  According to the invention described in claim 4, since the conductor pattern formed on the substrate is used as the static electricity deriving member, even if the moving member is moved, only the substrate is arranged along the moving direction. The conductor pattern can always be brought close to or in contact with a part of the ground plate.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[First embodiment]
1 and 2 show an electronic component constructed by using an electrostatic intrusion prevention mechanism for an electronic component according to a first embodiment of the present invention (hereinafter referred to as “sliding electronic component with a lock mechanism” in this embodiment) 1-1. 1 is an exploded perspective view, FIG. 1 shows an upper portion thereof, and FIG. 2 shows a lower portion thereof. FIG. 3 is a schematic sectional side view of the sliding electronic component 1-1 with a locking mechanism that moves along the linear direction. As shown in these drawings, the sliding electronic component 1-1 with a lock mechanism includes a mounting member 10 having a function of a fixed member and a first board (hereinafter referred to as “first circuit board” in this embodiment). 20, a second substrate (hereinafter referred to as “second circuit substrate” in this embodiment) 30, and a movable object (hereinafter referred to as “sliding object” in this embodiment) 50 attached with a slider 70. And a lock knob 100 to which a ground plate 80, a resilient means (hereinafter referred to as “coil spring” in this embodiment) 120 are attached, a case 130, and an operation knob 160. The electronic component main body is composed of the first circuit board 20 (particularly the switch pattern 23) constituting the electrical functional part and the sliding object 50 to which the slider 70 constituting the electrical functional part is attached. Has been. The lock knob 100, the coil spring 120, and the lock engaging portion 133 provided on the lower surface of the electronic component case (hereinafter referred to as "case") 130 constitute a lock mechanism. Each component will be described below.

  The attachment member 10 is formed of a rigid metal plate (or a synthetic resin plate), and attachment portions 11 made of small holes are provided at predetermined locations (four locations near the four corners in this embodiment). . The first circuit board 20 has a sliding contact pattern (hereinafter referred to as “in this embodiment,“ polyethylene terephthalate film (PET film), polyimide film (PI film), etc.) ”21 on a flexible insulating synthetic resin film. 23), and fixing portions 25 each having a small hole are provided at positions facing the mounting portions 11 of the mounting member 10. A belt-like lead portion 27 is connected to the outer periphery of the first circuit board 20, and a circuit pattern (not shown) drawn from the switch pattern 23 is drawn to the lead portion 27. The switch pattern 23 is formed by printing (screen printing or the like), copper foil etching, or the like. The second circuit board 30 is formed of a conductive static electricity deriving member (hereinafter referred to as a “conductor pattern” in this embodiment) on almost the entire upper surface of an insulating synthetic resin film having flexibility (for example, a PET film or a PI film). 33), a rectangular opening 35 having a dimension and shape that exposes the entire switch pattern 23 at a position facing the switch pattern 23 of the first circuit board 20, and the first circuit board 20 The fixing portions 37 each having a small hole are provided at positions facing the respective fixing portions 25. A strip-shaped lead portion 39 is connected to the outer periphery of the second circuit board 30, and a conductor pattern 33 is also provided on the upper surface thereof. The conductor pattern 33 is formed by printing (screen printing or the like), etching of a copper foil, or the like. In FIG. 2, the first and second circuit boards 20 and 30 are shown cut and separated at the connecting portions 29 and 29 for the sake of illustration. Are connected. That is, the first and second circuit boards 20 and 30 are formed on a single synthetic resin film 21 (31), and are overlapped with each other by folding back the connecting portions 29 and 29. The first and second circuit boards 20 and 30 may be configured as separate members by two independent synthetic resin films 21 and 31 instead of the single synthetic resin film 21 (31).

  The sliding object 50 is formed by molding a synthetic resin into a substantially rectangular shape, and a lock knob housing portion 51 is formed by forming a concave upper surface at the center thereof. In the center of the lock knob housing 51, there is provided a guide portion 53 having a small hole penetrating up and down in a circular shape, and on both sides of the guide portion 53, slit-like mounting portions 55 and 55 penetrating vertically are provided in parallel. Is provided. Further, a click member storage portion 57 having a circular bottomed hole is provided on one side surface parallel to the sliding direction of the sliding mold 50. The click member storage portion 57 stores a resilient means (hereinafter referred to as “coil spring” in this embodiment) 59 and a click member 61 made of a metal ball. The slider 70 is made of an elastic metal plate, and is configured by bending two sliding booklets 73 and 73 protruding from one side of the base 71 downward. Two mounting holes for fixing the slider 70 to the sliding mold 50 by inserting two small projections (not shown) provided on the lower surface of the sliding mold 50 into the base 71 and caulking the tips thereof. 77, 77 are provided.

  The ground plate 80 is configured by bending and deforming a metal plate (for example, a stainless steel plate) into a shape that substantially covers the entire upper surface of the sliding mold 50. That is, the lock knob housing portion of the sliding mold 50 is bent in a U-shape downwardly at the central portion of the flat plate portion which is in contact with the upper surfaces of both sides of the lock knob housing portion 51 of the sliding mold 50 and substantially covers this. A lock knob storage portion 82 is provided so as to be along 51. An insertion portion 81 formed of a through hole of the same shape is provided at a position opposite to the guide portion 53 of the sliding mold 50 at approximately the center of the lock knob storage portion 82, and on both sides of the insertion portion 81. A pair of cutout portions 83 and 83 that are cut out in a rectangular shape to expose the mounting portions 55 and 55 of the sliding mold 50 are provided, and one end portion of the flat plate portion (in the sliding direction of the ground plate 80). A plurality (two in this embodiment) of sliding contact portions 85, 85 project from one end portion, and the base portions of the sliding contact portions 85, 85 are bent downward by 90 °, and the intermediate portion is further slid in the sliding direction. It is bent 90 ° upward so as to face, and elastic contact portions 87, 87 are provided at its tip.

  The lock knob 100 is a molded product of a synthetic resin, and includes a lock main body portion 101 formed in a substantially rectangular shape and a knob portion 103 protruding from the center of the upper surface of the lock main body portion 101. The length of the lock body 101 in the sliding direction is formed to be substantially the same as the length of the lock knob storage portion 82 of the ground plate 80 in the sliding direction. At both ends of the lock body 101 in the sliding direction, there are provided a pair of lock portions 105, 105 protruding in a bar shape extending in a direction orthogonal to the sliding direction, and both sides of the knob 103 of the knob body 101. Insertion portions 107, 107 penetrating vertically in the shape of slits having substantially the same shape as these are provided in parallel at positions facing the mounting portions 55, 55 of the sliding mold 50. The knob portion 103 is configured by projecting a long cylindrical pressing portion 115 from the upper part of the base portion 113, and a circular elastic means housing hole 109 is provided on the lower surface of the knob portion 103 as shown in FIG. 3. A cylindrical guide protrusion 111 is erected in the center of the bottom surface of the bullet means housing hole 109. The guide protrusion 111 protrudes from the elastic means housing hole 109.

  The case 130 is formed by molding synthetic resin into a rectangular box shape with an open bottom surface, and a rectangular opening (longitudinal dimension is in the sliding direction) 131 is provided at the center thereof. . Concave lock engaging portions 133 are provided at four positions on the left and right sides of the lower surface of the opening 131 so as to connect to both sides of the opening 131. The pair of left and right lock engaging portions 133 are formed in a size and shape that simultaneously engages both ends of the pair of lock portions 105, 105 provided on the lock knob 100. An uneven click engagement portion 135 is provided on one side surface (one side surface parallel to the sliding direction) of the case 130. In addition, fixing portions 137 (only three locations are shown in FIG. 1) are provided at the four corners of the lower surface of the case 130. The fixing portions 137 are small protrusions protruding downward.

  The operation knob 160 is formed by molding a synthetic resin into a substantially rectangular flat plate shape, and an elliptical opening 161 into which the pressing portion 115 of the lock knob 100 is vertically movable is provided at the center. Further, on both sides of the opening 161 on the lower surface of the operation knob 160, flat rectangular mounting portions 163 and 163 are provided so as to protrude downward in parallel. The tip portions of the attachment portions 163 and 163 are insertion attachment portions 165 and 165 having a narrow width. The mounting portion 163 can be inserted into the insertion portion 107 of the lock knob 100, but has a size that cannot be inserted into the notch portion 83 of the ground plate 80 and the mounting portion 55 of the sliding object 50. The attachment portion 165 is formed to have a size that can be inserted into the cutout portion 83 of the ground plate 80 and the attachment portion 55 of the sliding object 50.

  An example of assembling the slide-type electronic component 1-1 with the lock mechanism will be described. First, the case 130 is disposed below the operation knob 160, and at that time, a pair of attachments of the operation knob 160 are installed in the opening 131 of the case 130. The parts 163 and 163 are inserted. Next, the lock knob 100 is inserted into the lower surface side of the case 130. At this time, the pressing portion 115 of the lock knob 100 is inserted into the opening 161 of the operation knob 160 and the pair of mounting portions 163 and 163 of the operation knob 160 are locked. Is inserted into the insertion portion 107. Next, the coil spring 120 is inserted into the guide protrusion 111 of the lock knob 100 and is stored in the impact means storing hole 109. Next, the sliding object 50 with the ground plate 80 placed on its upper surface is housed on the lower surface side of the case 130. At that time, the slider 70 is attached to the lower surface of the sliding mold 50, and the coil spring 59 and the click member 61 are stored in the click member storage portion 57 of the sliding mold 50. As a result, the lock main body 101 of the lock knob 100 is accommodated in the lock knob accommodating portion 82 of the ground plate 80, and the click member 61 is elastically contacted with the click engagement portion 135 of the case 130 by the coil spring 59. At this time, the insertion mounting portions 165 and 165 at the tips of both mounting portions 163 and 163 of the operation knob 160 are inserted into the mounting portions 55 and 55 of the sliding object 50 through the notches 83 and 83 of the ground plate 80. Fix the tip by heat caulking. Next, the second and first circuit boards 30 and 20 and the mounting member 10 are arranged below the sliding mold 50 so that the second circuit board 30 is located on the upper side, and the second circuit board 30 is disposed. The fixing part 137 of the case 130 is inserted into each fixing part 37 provided on the circuit board 30, each fixing part 25 provided on the first circuit board 20, and each mounting part 11 provided on the mounting member 10. The tip is fixed with heat caulking on the lower surface of the mounting member 10. As a result, the sliding electronic component 1-1 with the lock mechanism is completed. As shown in FIG. 3, the slide type electronic component 1-1 with the lock mechanism is configured so that substantially the entire upper surface of the sliding object 50 is covered with the ground plate 80 and the sliding contact portion 85 of the ground plate 80 that is elastically deformed. The first circuit board in which the elastic contact portion 87 abuts on the conductor pattern 33 of the second circuit board 30 and the sliding booklet 73 of the slider 70 is exposed by the opening 35 provided in the second circuit board 30. It is in contact with 20 switch patterns 23. Finally, the circuit pattern provided on the first circuit board 20 is connected to another external electric circuit via the lead part 27, and the conductor pattern 33 provided on the second circuit board 30 is connected to the lead part 39. It is connected to an external earth circuit via

  Next, an example of the operation of the sliding electronic component 1-1 with a lock mechanism will be described. 3 is in a state where the lock portions 105 and 105 of the lock knob 100 are not engaged with the lock engagement portions 133 and 133 of the case 130, that is, the lock portions 105 and 105. Is in contact with the surface of the lower surface of the case 130 other than the lock engaging portions 133 and 133, and the entire lock main body portion 101 of the lock knob 100 is inserted into the lock knob housing portion 82 of the ground plate 80. Yes. Therefore, in this state, even if the lock knob 100 is not operated, the sliding mold 50 is slid only by sliding the operation knob 160 in the linear direction, and the sliding booklet 73 of the slider 70 is switched accordingly. At the same time that the electrical output (switch on / off output) is changed by sliding on the pattern 23, the click member 61 elastically contacting the click engaging portion 135 of the case 130 gets over the convex portion of the click engaging portion 135. A click sensation occurs every time. At the same time, the elastic contact portion 87 of the sliding contact portion 85 of the ground plate 80 slides on the conductor pattern 33 of the second circuit board 30. On the other hand, when the pair of lock portions 105, 105 of the lock knob 100 comes to a position facing the pair of lock engagement portions 133, 133 of the case 130 by the sliding movement of the sliding type object 50, the lock knob 100 is moved to the coil spring 120. The pair of lock portions 105, 105 and the pair of lock engaging portions 133, 133 are engaged by being pushed up by the elastic force, and the sliding object 50 is locked at this position. In order to release the lock, the operation knob 160 may be slid in a state where the pressing portion 115 of the lock knob 100 is pressed and the engagement between the lock portions 105 and 105 and the lock engagement portions 133 and 133 is released. .

  By the way, when the operation knob 160 or the lock knob 100 is operated with a finger or the like as described above, if the finger or the like is charged, the charged static electricity is applied to the pressing portion 115 of the lock knob 100 and the opening 161 of the operation knob 160. In some cases, the gap between the outer periphery of the operation knob 160 and the gap between the upper surface of the case 130 and the upper surface of the case 130 may enter the case 130 through the opening 131 of the case 130. Enters the ground plate 80 which is a good conductor disposed close to the opening 131. The static electricity incident on the ground plate 80 is guided to the conductor pattern 33 of the second circuit board 30 through the sliding contact portion 85 and is conducted from the lead-out portion 39 to the external ground circuit. Since the conductor pattern 33 is provided at least over the entire portion where the elastic contact portion 87 slides, the conductive pattern 33 and the elastic contact portion 87 are in contact with each other regardless of the position of the sliding mold 50. Is in a state. Therefore, the static electricity that has entered through the opening 131 of the case 130 is not introduced into the slider 70, the switch pattern 23 of the first circuit board 20, and other circuit patterns, and the electrical output is reliably caused by static electricity. Noise and the like can be prevented from entering.

  That is, the sliding electronic component 1-1 with a lock mechanism includes a case 130 having an opening 131, an operation knob 160 installed on the upper part of the case 130, and a case installed on the lower part of the case 130 via the opening 131. An electronic component main body portion (consisting of a sliding mold 50, a slider 70, etc.) operated from the upper side of 130, and has conductivity to inject static electricity entering from the opening 131 of the case 130. A ground plate 80 is attached to the electronic component main body, and a conductor pattern 33 is provided to guide static electricity that has entered the ground plate 80 by contacting a part of the ground plate 80 from the ground plate 80. The electronic component main body includes a sliding type object 50 that is operated and moved from the upper side of the case 130, and an electrical function part (slider 70 and a sliding element 70) that changes its electrical output as the sliding type object 50 moves. Switch pattern 23). The conductor pattern 33 is formed on the second circuit board 30 installed adjacent to the sliding mold 50.

[Second Embodiment]
FIG. 4 is a schematic sectional side view (a sectional view of the same part as FIG. 3) of the sliding electronic component 1-2 with a locking mechanism according to the second embodiment of the present invention. In the slide-type electronic component 1-2 with the lock mechanism shown in the same figure, the same or corresponding parts as those in the slide-type electronic component 1-1 with the lock mechanism according to the first embodiment are denoted by the same reference numerals. Note that matters other than those described below are the same as those in the first embodiment. The outline of the sliding electronic component 1-2 with the locking mechanism shown in the figure, which is different from the sliding electronic component 1-1 with the locking mechanism, is that of the sliding contact portions 85, 85 of the ground plate 80 shown in the first embodiment. Instead, there is provided a side wall portion 88 that is bent downward from the upper surface of the sliding plate 50 of the ground plate 80 toward the side surface thereof, and the front end side (lower end side) 89 is disposed close to the conductor pattern 33. It is a point that was a part. That is, the discharge unit 89 lowers a part of the ground plate 80 that covers the upper surface of the sliding mold 50 along the side surface of the sliding mold 50 (it does not need to follow), and the tip portion of the ground plate 80 becomes the conductor pattern 33. It is formed so that the static electricity incident on the ground plate 80 can be easily discharged to the conductor pattern 33 via the discharge portion 89. That is, the static electricity that has entered the ground plate 80 can be led out from the ground plate 80 to the conductive pattern 33 not only by directly contacting the conductor pattern 33 with a part of the ground plate 80 but also approaching the conductive pattern 33.

[Third embodiment]
FIG. 5 is a schematic sectional side view (a sectional view of the same part as FIG. 3) of the sliding electronic component 1-3 according to the third embodiment of the present invention. In the slide type electronic component 1-3 shown in the figure, the same or corresponding parts as those in the slide type electronic component 1-1 with the lock mechanism according to the first embodiment are denoted by the same reference numerals. Note that matters other than those described below are the same as those in the first embodiment. The outline of the slide type electronic component 1-3 shown in the figure, which is different from the slide type electronic component 1-1 with the lock mechanism, is the lock mechanism shown in the first embodiment, that is, the lock knob 100, the coil spring 120, and the case 130. This is that the lock engaging portion 133 provided on the lower surface is omitted. Instead, in this embodiment, a columnar operation shaft 65 is provided on the upper surface of the slide mold 50 so as to be integral with the slide mold 50, and the upper portion of the operation shaft 65 is fixed to the operation knob 160, while grounding. The plate 80 covers substantially the entire upper surface of the sliding mold 50 other than the portion penetrating the operation shaft 65. In the case of this embodiment, since no locking mechanism is provided, a structure such as the opening 161 that allows static electricity to easily enter inside the operation knob 160 as in the first embodiment (if the opening 161 is provided, the case The creepage distance to the lower surface side is shortened and static electricity does not easily enter. However, the outer peripheral four sides of the operation knob 160 (especially the outer peripheral two sides in the short direction (width direction) of the operation knob 160 with a short creepage distance) ) Through the gap between the operation knob 160 and the upper surface of the case 130, static electricity may enter the lower surface side of the case 130 from the opening 131, and the antistatic structure using the ground plate 80 or the like is effective.

[Fourth embodiment]
FIG. 6 is a schematic sectional side view of the rotary electronic component 1-4 moving along the circumference according to the fourth embodiment of the present invention. In the structure of each part of the rotary electronic component 1-4, parts corresponding to the structure of the first embodiment are denoted by the same reference numerals (provided with suffixes). A rotary electronic component 1-4 according to this embodiment includes a first board (hereinafter referred to as “first circuit board” in this embodiment) 20-4 and a second board on a mounting member 10-4. (Hereinafter referred to as “second circuit board” in this embodiment) 30-4, and a movable object (hereinafter referred to as “sliding object” in this embodiment) 50-4 to which a slider 70-4 is attached. The earth plate 80-4, the case 130-4, and the operation knob 160-4 are installed.

  The mounting member 10-4 is configured by a rigid metal plate (or a synthetic resin plate), and a shaft portion 67-4 of a sliding type object 50-4 described below is pivotally disposed at a predetermined position thereof. A shaft support portion 13-4 formed of a small hole to be supported is provided. The first circuit board 20-4 is provided with a switch pattern 23-4 extending in an arc shape on the upper surface of an insulating synthetic resin film (for example, PET film, PI film, etc.) 21-4 having flexibility, and the attachment A through portion 28-4 formed of a small hole that penetrates the shaft portion 67-4 is provided at a position facing the shaft support portion 13-4 of the member 10-4. The second circuit board 30-4 is formed of an electrostatic discharge member (hereinafter referred to as a "conductor pattern" in this embodiment) on almost the entire upper surface of an insulating synthetic resin film (for example, PET film, PI film, etc.) 31-4 having flexibility. 33-4, and the entire switch pattern 23-4 is exposed at a position facing the switch pattern 23-4 of the first circuit board 20-4 (and the rotating slider 70-4 is further rotated). An opening 35-4 having a dimension and shape (over the entire movement range) is provided. The first and second circuit boards 20-4 and 30-4 are formed by superimposing them on top of each other by forming them on a single synthetic resin film 21-4 (31-4) and folding them back. Alternatively, it may be composed of two independent synthetic resin films 21-4 and 31-4.

  The sliding mold 50-4 is formed by molding a synthetic resin into a substantially disk shape. The shaft portion 67-4 protrudes from the lower surface and the operation shaft 68-4 protrudes from the upper surface. A slider 70-4 attached to the lower surface of the sliding mold 50-4 is made of an elastic metal plate, and two sliding booklets 73-4 protruding from one side of the base 71-4 are bent downward. It is configured. The sliding booklet 73-4 is in contact with the switch pattern 23-4. The ground plate 80-4 is configured to have a shape that substantially covers the entire upper surface of the sliding-type object 50-4 with a metal plate (for example, a stainless steel plate). Further, from the outer periphery, a sliding contact portion 85-4 projecting outward in the radial direction of the sliding mold 50-4 via a side portion 84-4 descending along the side surface of the sliding mold 50-4. And the elastic contact portion 87-4 is provided at the tip thereof. The elastic contact portion 87-4 is in contact with the conductor pattern 33-4. The conductor pattern 33-4 is provided at least over the entire portion where the elastic contact portion 87-4 slides. The case 130-4 is formed by molding synthetic resin into a box shape having an open bottom surface, and an operation shaft 68-4 of the sliding mold 50-4 is pivotally supported at the center thereof. A circular opening 131-4 is provided. The case 130-4 is fixed on the mounting member 10-4 together with the first and second circuit boards 20-4 and 30-4 by fixing means (not shown). The operation knob 160-4 is formed by molding synthetic resin into a substantially disk shape, and the operation shaft 68-4 is attached to an attachment portion 167-4 provided at the center of the lower surface thereof.

  When the slide-type object 50-4 is rotated integrally with the operation knob 160-4, the sliding booklet 73-4 of the slider 70-4 slides on the switch pattern 23-4 and its electrical output. Changes. On the other hand, when the rotary electronic component 1-4 is operated with a finger or the like, static electricity charged on the finger or the like is caused by a gap between the operation shaft 68-4 and the opening 131-4 on the back side of the case 130-4. However, the static electricity that has entered through the opening 131-4 is incident on the ground plate 80-4, which is a good conductor disposed close to the opening 131-4, and the sliding contact portion 85-4. Is led to the conductor pattern 33-4 of the second circuit board 30-4 and is conducted to an external earth circuit. Therefore, the static electricity that has entered from the opening 131-4 of the case 130-4 is not introduced into the slider 70-4, the switch pattern 23-4, and other circuit patterns, and the electrical output is reliably caused by static electricity. Noise and the like can be prevented from entering.

  That is, the rotary electronic component 1-4 is installed in a case 130-4 having an opening 131-4, an operation knob 160-4 installed at the upper part of the case 130-4, and a lower part of the case 130-4. An electronic component main body (consisting of a sliding mold 50-4, a slider 70-4, etc.) operated from the upper side of the case 130-4 through the opening 131-4. A ground plate 80-4 having conductivity to which static electricity entering from the opening 131-4 side of the metal is incident is attached, and the ground plate 80-4 is intruded by contacting a part of the ground plate 80-4. A conductor pattern 33-4 for deriving static electricity from the ground plate 80-4 is provided. The electronic component main body includes a sliding type object 50-4 that is operated and moved from the upper side of the case 130-4, and an electrical function part that changes its electrical output by the movement of the sliding type object 50-4. (Consisting of a slider 70-4 and a switch pattern 23-4). The conductor pattern 33-4 is formed on the second circuit board 30-4 installed adjacent to the sliding mold 50-4. Also in this embodiment, the sliding contact portion 85-4 of the ground plate 80-4 is omitted as in the second embodiment, and instead, a part of the ground plate 80-4 approaches the conductor pattern 33-4. There may be provided a discharge portion arranged in a row.

[Fifth embodiment]
FIG. 7 is a schematic cross-sectional side view (cross-sectional view of the same portion as FIG. 3) of a sliding electronic component 1-5 with a lock mechanism according to a fifth embodiment of the present invention. In the slide-type electronic component 1-5 with a lock mechanism shown in the figure, the same or corresponding parts as those of the slide-type electronic component 1-1 with a lock mechanism according to the first embodiment are denoted by the same reference numerals. Note that matters other than those described below are the same as those in the first embodiment. In the slide type electronic component 1-5 shown in the figure, the outline different from the slide type electronic component 1-1 with the lock mechanism is that the conductor pattern 33 which is the static electricity deriving member shown in the first embodiment is formed. The second circuit board 30 and the sliding contact portion 85 (including the elastic contact portion 87) of the ground plate 80 which is in sliding contact with the conductor pattern 33 are omitted, and instead, a predetermined position of the ground plate 80 can be used as a static electricity lead-out member. A flexible lead wire or flexible circuit board 91 is electrically contacted (connected), and the other part of the lead wire or flexible circuit board 91 is electrically connected to an external ground circuit 93. The lead wire or the flexible circuit board 91 is attached to the ground plate 80 with a predetermined bending so that the sliding object 50 and the ground plate 80 are slidable. Even with this configuration, the static electricity that has entered the ground plate 80 can be easily led out from the ground plate 80.

  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, and material not directly described in the specification and drawings are 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, in the above embodiment, the conductor pattern 33 formed on the substrate (second circuit board 30) is used as the static electricity extracting member that approaches or contacts a part of the ground plate 80, but the static electricity extracting member is not limited to this. You may comprise with a metal plate etc. In addition, the static electricity deriving member does not need to be installed on the lower side of the movable object, and may be installed on the side surface (for example, the inner surface of the case) or the upper surface side (for example, the lower surface of the case). It suffices if it is installed adjacent to. Further, the mounting member 10 constituting the electronic component is provided as a fixed side member for fixing the substrate (second circuit substrate) 30. However, this is omitted, and an external member other than the electronic component (for example, the electronic component or the like) The substrate 30 may be directly fixed to a member that simultaneously attaches the components. In the above embodiment, the electrical function unit is configured by the switch mechanism including the slider 70 and the switch pattern 23. However, other electrical outputs such as a variable resistance mechanism using a resistance pattern instead of the switch pattern 23 are provided. You may comprise by the mechanism obtained. Moreover, the electrical function part does not necessarily need to be configured by a slider and a pattern provided on the substrate, and may be electrical function parts having other various structures. In short, any structure may be used as long as it is an electrical functional unit that changes its electrical output by movement of a movable object. In the above embodiment, the ground plate 80 is formed of a metal plate. However, the ground plate 80 may be a member having conductivity, for example, a synthetic resin plate (a hard synthetic resin plate may be used, or a flexible synthetic plate). A conductive layer may be provided on the surface of a synthetic resin plate made of a resin film). Further, the operation knob 160 is not always necessary. For example, in the case of the sliding electronic component 1-3 shown in FIG. 5 or the rotary electronic component 1-4 shown in FIG. 6, the operation shaft 65 or the operation shaft 68-4 itself is operated. It may be used as

It is a disassembled perspective view (upper part) of the sliding electronic component 1-1 with a lock mechanism. It is a disassembled perspective view (lower part) of the sliding electronic component 1-1 with a locking mechanism. It is a schematic sectional side view of the sliding electronic component 1-1 with a locking mechanism. It is a schematic sectional side view of the sliding electronic component 1-2 with a locking mechanism. It is a schematic sectional side view of the sliding electronic component 1-3. It is a schematic sectional side view of the rotary electronic component 1-4. It is a schematic sectional side view of the slide-type electronic component 1-5 with a locking mechanism.

Explanation of symbols

1-1 Sliding electronic parts with lock mechanism (electronic parts)
10 Mounting member (fixed side member)
20 First circuit board (electronic component body)
23 Switch pattern (electronic component body, electrical function)
30 Second circuit board (board)
33 Conductor pattern (electrostatic discharge member)
35 Opening 50 Sliding type (movable type, electronic component body)
70 Slider (Electronic component body, electrical function)
80 Ground plate 85 Sliding contact portion 87 Elastic contact portion 120 Coil spring (bounce means, lock mechanism)
100 Lock knob (lock mechanism)
130 Case 131 Opening 133 Locking engagement portion (locking mechanism)
160 Operation Knob 1-2 Slide Electronic Component with Lock Mechanism 1-3 Slide Electronic Component 1-4 Rotary Electronic Component 1-5 Slide Electronic Component with Lock Mechanism 91 Lead Wire or Flexible Circuit Board (Static Deriving Member)

Claims (4)

An electronic component case having an opening;
In an electronic component comprising an electronic component main body portion installed at a lower portion of the electronic component case and operated from the upper side of the electronic component case through the opening,
While attaching to the electronic component main body a conductive earth plate that enters the static electricity entering through the opening of the electronic component case,
An electrostatic component intrusion prevention mechanism for an electronic component, comprising: a static electricity deriving member for deriving static electricity that has entered the ground plate by approaching or contacting the ground plate from the ground plate. The electronic component main body is configured to include a movable object that is operated and moved from the upper side of the case, and an electrical function unit that changes its electrical output by the movement of the movable object,
2. The mechanism for preventing electrostatic intrusion of an electronic component according to claim 1, wherein the ground plate is attached so as to cover an upper surface of the movable object. The static electricity deriving member is fixed to a stationary member adjacent to the movable object,
The mechanism for preventing electrostatic intrusion of an electronic component according to claim 2, wherein the ground plate is provided with a sliding contact portion that slides on the static electricity deriving member as the movable object moves.   4. The mechanism for preventing electrostatic intrusion of an electronic component according to claim 2, wherein the static electricity deriving member is a conductor pattern formed on a substrate.

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