JP6084555B2 - Drip-proof structure of rotating electronic parts with illumination mechanism - Google Patents

Description

  The present invention provides a rotary type with an illumination mechanism that prevents liquid that enters the case from the gap between the rotary knob and the opening of the case exposing the rotary knob from entering various electronic components installed in the case. The present invention relates to a drip-proof structure for electronic parts.

  Conventionally, in a rotary electronic component, as shown in Patent Document 1, for example, an opening in which a part of an outer peripheral portion of a rotary knob (30) of the rotary electronic component (1) is provided in a case (100, 10) is provided. (105) is exposed to the outside, and a portion exposed from the opening (105) of the rotary knob (30) is rotated with a finger or the like to drive an electrical function unit (not shown) in the case (100, 10). However, there is a structure that changes the detection output.

  And the rubber | gum which plugs up the clearance gap between the said opening (105) and a rotation knob (30) so that the liquid which penetrates from the clearance gap between the said opening (105) and a rotation knob (30) may not adhere to the said electrical function part. A drip-proof plate (60) is installed. The knob operation surface (31) of the rotary knob (30) is illuminated by light from the light guide (23) installed on the back side thereof.

JP 2011-134573 A

  However, in the conventional drip-proof structure of the rotary electronic component (1), since the rubber-like drip-proof plate (60) has to be installed, not only the number of components is increased and the manufacturing cost is increased, but also the assembly process is increased. It becomes complicated. Further, since the rubber-like drip-proof plate (60) abuts on the rotary knob (30), resistance is generated in the rotary operation of the rotary knob (30), and the smooth operation of the rotary knob (30) may be hindered. Further, even when the rubber-like drip-proof plate (60) as described above is attached, a part of the water passes through the rubber-type drip-proof plate (60) and enters the inside of the case (100). ), The case (100) is not provided with a drip-proof mechanism, so that it cannot be drip-proof, and the infiltrated water adheres to the internal electronic components. There was a fear.

  The present invention has been made in view of the above points, and its purpose is to achieve effective drip-proofing, to reduce the number of parts, to reduce the manufacturing cost, and to further rotate the rotary knob. An object of the present invention is to provide a drip-proof structure for a rotary electronic component with an illumination mechanism that can be smoothly applied.

The present invention has a detection means for mounting an electronic component on one surface of a circuit board and arranging a rotary knob on the other surface side, and changing an output between the rotary knob and the circuit board according to the rotation of the rotary knob. The circuit board and the rotary knob are stored in the case, a part of the outer periphery of the rotary knob is exposed from an opening provided in the case, and the exposed outer peripheral surface is used as a knob operation surface. is a lighting mechanism with a rotary electronic component comprising a light guide which illuminate the aperture or around the knob operation surface of the rotary knob of the introduced light emitting element and the light emitting element is irradiated case, the The light-emitting element is included in an electronic component on one side of the circuit board, and the light guide is formed in a substantially box shape with the surface on the circuit board side open, and the electrons on the one side of the circuit board Structure to cover parts It is characterized in that to prevent the intrusion into the electronic part of the liquid entering from the opening of the case.
If comprised in this way, in addition to the function which guides light to a light guide, the drip-proof function of the electronic component attached to the circuit board can be given together. That is, it is possible to effectively perform drip-proofing of electronic components without increasing the number of components.
In addition, since the light emitting element is included in the electronic component on one surface of the circuit board, the light emitting element itself can also be drip-proof by the light guide.

The present invention is also directed to a light reflecting portion for reflecting light emitted from the light emitting element on the outer surface of the light guide opposite to the circuit board, and to enter the light guide through the opening of the case. A drainage guide protrusion is provided to stand so as to guide the drainage of the liquid flowing along the outer surface of the body.

Further, the present invention provides a drainage port into which the drainage guide projection is inserted at a position facing the drainage guide projection of the case. On the other hand, the liquid flowing along the outer surface is transferred to the outer surface of the light guide. A drainage guide groove to be collected in the drainage guide protrusion is formed.

The present invention, before Kishirube the light has a lighting unit comprising extended on the other side from the edge of the circuit board portion of the opening side of the case, provided with the illuminating unit to the rotary knob By inserting into the groove, the knob operating surface of the rotary knob is illuminated from the back side, and the liquid that enters the groove of the rotary knob from the opening of the case is guided in a direction left and right away from the detection means. It is characterized by.
A function to illuminate the knob operation surface of the rotary knob on the illumination section provided on the light guide, and a function to guide the liquid that has entered the groove of the rotary knob from the opening of the case in a direction away from the detection means and to prevent drip. Can be held together.

  According to the present invention, effective drip-proofing can be performed, the number of parts can be reduced, the manufacturing cost can be reduced, and the rotation knob can be smoothly rotated.

1 is a perspective view of a rotary electronic component 1. FIG. It is a schematic sectional drawing (AA schematic sectional drawing of FIG. 1) of the rotary electronic component 1. FIG. It is a disassembled perspective view of the rotary electronic component 1 (part of it). It is a disassembled perspective view of the rotary electronic component 1 (remaining components). It is a disassembled perspective view of the rotary electronic component 1 (a part of the components) viewed from another direction. It is a disassembled perspective view of the rotary electronic component 1 (remaining components) seen from another direction. 2 is a perspective view of a circuit board 150 and a light guide body 200. FIG. It is the figure which looked at the light guide 200 from the circuit board 150 side. FIG. 6 is a perspective view showing a state where a light guide 200 is mounted on a circuit board 150. It is the perspective view which looked at the rotary knob 100 from another angle.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a rotary electronic component 1 constructed using an embodiment of the present invention, FIG. 2 is a schematic sectional view of the rotary electronic component 1 (A-A schematic sectional view of FIG. 1), FIG. Is an exploded perspective view of the rotary electronic component 1 (part of it), FIG. 4 is an exploded perspective view of the rotary electronic component 1 (the remaining components), and FIG. 5 is a rotary electronic component 1 viewed from another direction. FIG. 6 is an exploded perspective view of the rotary electronic component 1 (remaining components) viewed from another direction. As shown in these drawings, the rotary electronic component 1 is configured by housing various components constituting the rotary electronic component 1 in first, second, and third cases 10, 50, and 250. In the following description, “upper” refers to the direction of viewing the third case 250 from the first and second cases 10, 50, and “lower” refers to the opposite direction.

  As shown in FIGS. 1 to 6, the rotary electronic component 1 includes a rotary knob 100 having a slider 130 attached between a first case 10 and a second case 50, a circuit board 150, and a light guide 200. And a third case 250 attached from above the first and second cases 10 and 50.

  The first case 10 is a molded product of synthetic resin, and is formed in a substantially rectangular box shape in which the upper side and the side facing the second case 50 are released. A cylindrical shaft portion 11 that protrudes toward the second case 50 is provided on the upper surface of the inner surface of the first case 10, and an arc-shaped click engagement portion is provided on the lower inner surface of the shaft portion 11. 13 is formed. A screw insertion hole 17 is formed in the center on the tip end side of the shaft portion 11, and a screw insertion hole 15 is formed in the center on the base side of the shaft portion 11, both communicating with each other inside the shaft portion 11. The screw insertion hole 17 has an inner diameter smaller than that of the screw insertion hole 15, and a step is formed at the connecting portion between the two. A plurality of terminals 21 are attached to the lower side wall of the first case 10 by insert molding. Each terminal 21 is bent in an L shape, and one end portion projects downward from the lower surface in a row, and the other end portion projects in a row toward the second case 50 side. On the other hand, a second case locking hole 23 is formed at a position below the left and right side walls of the first case 10 so as to penetrate therethrough. A substantially rectangular drain port 25 is provided in a substantially central position of the first case 10 so as to penetrate therethrough.

  The second case 50 is a molded product of a synthetic resin, and is formed in a substantially rectangular box shape in which the upper side and the side facing the first case 10 are released. Locking claws 51 projecting toward the first case 10 are formed on the left and right side walls of the second case 50 at positions facing the respective second case locking holes 23 of the first case 10. At a position close to the opening above the left and right side walls of the second case 50, a small case claw-shaped third case locking portion 53 is formed. A drainage port 59 for inserting the drainage guide projection 211 is provided at a position of the second case 50 facing the drainage guide projection 211 of the light guide 200 described below.

  FIG. 10 is a perspective view of the rotary knob 100 as seen from another angle. As shown in FIGS. 3, 5, and 10, the rotary knob 100 is a molded product obtained by molding a synthetic resin into a substantially disk shape, and a part of the outer peripheral surface (about a half circumference) is used as a knob operation surface 105. A shaft support hole 109 is provided in the center of the rotary knob 100. A locking portion 111 (see FIG. 2) is formed inside the shaft support hole 109 so as to project in a ring shape. The surface of the rotary knob 100 on the second case 50 side is a slider attachment surface 113, and the slider attachment surface 113 is provided with three small protrusion-like locking portions 115. An arc-shaped groove 117 is formed around the slider mounting surface 113 of the rotary knob 100 (inside the knob operation surface 105). Further, a click member insertion hole 119 formed of a circular recess is formed in the vicinity of the shaft support hole 109 on the surface of the rotary knob 100 on the first case 10 side. Further, as shown in FIG. 2, a transparent (or translucent such as milky white) light guide 121 is attached to a predetermined position in the side wall 103 provided with the knob operation surface 105 by, for example, two-material molding, and the illumination A portion 123 penetrates the side wall 103 and is exposed to the knob operation surface 105.

  The slider 130 is formed of an elastic metal plate in a ring shape, and a plurality of (three) sliding booklets 131 are provided at equal intervals, and a mounting portion 133 having a small hole is provided at the base portion of each sliding booklet 131. Configured.

  The circuit board 150 is configured by forming circuit patterns (not shown except for those necessary for the description) on both surfaces of the hard board 151. Three arc-shaped sliding contact patterns 153 are formed in a ring shape on the upper surface of the circuit board 150 on the first case 10 side. The sliding contact pattern 153 is arranged in a ring shape around the rotation center axis of the rotary knob 100. The three sliding contact patterns 153 are configured by a common pattern, a switch pattern, and a resistor pattern, respectively. Needless to say, various changes can be made to the type and shape of the sliding contact pattern 153.

  A plurality of electronic components 155 (155a, b, c, d, e) are attached near the center of the surface of the circuit board 150 on the second case 50 side. Each of the electronic components 155a to 155e is a chip-type electronic component, and the electronic component 155a is a light emitting element. The other electronic components 155b to 155b are, for example, fixed resistors, capacitors, diodes, semiconductor elements, and the like. In the vicinity of the lower side of the circuit board 150, a plurality of terminal mounting holes 157 formed in a row are formed, and soldering lands are provided around the terminal mounting holes 157 on the surface on the second case 50 side. A portion 159 is formed.

  7 to 9 are views showing the relationship between the circuit board 150 and the light guide 200, FIG. 7 is a perspective view of the circuit board 150 and the light guide 200, and FIG. 8 is a view of the light guide 200 from the circuit board 150 side. FIG. 9 is a perspective view showing a state where the light guide 200 is mounted on the circuit board 150. As shown in these drawings, the light guide 200 is a molded product of a transparent (or translucent) synthetic resin, and is made of, for example, a transparent acrylic resin, a transparent polycarbonate resin, or the like. The light guide body 200 is formed in a substantially box shape with the surface on the circuit board 150 side opened, and a contact portion 203 is provided on the inner base portion of the outer peripheral side wall 201 so as to substantially follow the outer peripheral side wall 201. . The contact portion 203 is formed in a shape that makes contact with the circuit board surface surrounding the entire circumference of the surface of the circuit board 150 on which the electronic component 155 is attached. For this reason, when the circuit board 150 is attached to the light guide 200, the circuit board 150 is supported by being in contact with the contact portion 203 of the light guide 200, as shown in FIG. Surrounded by In other words, the light guide 200 is configured to cover the electronic component 155 on one surface of the circuit board 150.

  An illumination unit 205 projects from the outer peripheral side wall 201 at the top of the light guide body 200. The illumination unit 205 has a substantially arc plate shape, and is formed to have a size to be inserted into the groove 117 of the rotary knob 100. In other words, as shown in FIG. 9, the illumination unit 205 is provided at a position that surrounds the outer periphery of the portion of the circuit board 150 where the sliding contact pattern 153 is provided about a half circumference. Near the center of the surface of the light guide body 200 on the second case 50 side, a light reflecting portion 207 made up of a horizontally elongated recess having a V-shaped cross section is formed. Further, a condensing portion 208 made of a horizontally long semi-cylindrical lens for condensing is formed at a position facing the light emitting element 155a on the surface opposite to the light reflecting portion 207. The light reflecting unit 207 and the light collecting unit 208 are for the light emitted from the light emitting element 155a to be collected by the light collecting unit 208, reflected by the light reflecting unit 207, and directed toward the illumination unit 205. It is.

  Further, a shallow drainage guide groove 209 is provided on the surface of the light guide body 200 facing the second case 50 side, the width of the drainage guide groove 209 narrows downward, and stands vertically at the lower end thereof. A drainage guide protrusion 211 is provided.

  The third case 250 is a molded product of synthetic resin, and is formed in a substantially rectangular box shape with the lower part released. A horizontally elongated substantially rectangular opening 251 is formed near the center of the upper surface of the third case 250, and a horizontally elongated substantially rectangular light guide hole 253 is formed at a position adjacent to the opening 251. . The left and right side walls of the third case 250 are formed with locking portions 255 made of small holes that are locked to the third case locking portions 53 of the second case 50. A display portion 257 having a desired shape is provided on the side of the light guide hole 253. The display unit 257 is transparent (or translucent) and is illuminated on the front side by illuminating the back side. For example, the display unit 257 is configured by forming the third case 250 with a transparent synthetic resin and applying an opaque paint on the surface thereof, and then removing the paint on the display unit 257 with a laser or the like. What is necessary is just to comprise by shaping | molding. A light guide member 260 is inserted and attached to the third case 250 from below. The light guide member 260 is formed by molding a transparent (or translucent) synthetic resin into a horizontally long substantially rectangular flat plate shape, and is inserted almost exactly into the light guide hole 253 on the surface facing the third case 250 side. The insertion portion 261 having a shape is projected.

  In order to assemble the rotary electronic component 1, first, the slider 130 is first brought into contact with the slider mounting surface 113 of the rotary knob 100, and at this time, each locking portion 115 of the rotary knob 100 is connected to each slider 130. It inserts in the attaching part 133, and attaches by thermally crimping the front-end | tip of each latching | locking part 115. FIG.

  Then, with the coil spring 270 and the click ball 271 inserted in the click member insertion hole 119 of the rotary knob 100, the rotary knob 100 is inserted into the first case 10, and the shaft portion 11 of the first case 10 is rotated. It is inserted into the shaft support 109 of 100 in a rotatable manner. Then, a ring-shaped retaining plate 280 is placed on the tip of the shaft portion 11 and the locking portion 111 of the rotary knob 100, and a screw 290 is inserted into the screw insertion hole 15 of the first case 10 from the outside thereof. The head 291 of the 290 is brought into contact with the bottom surface of the screw insertion hole 15, and at the same time, the tip end portion 293 of the screw 290 is inserted into the screw insertion hole 17 and inserted into the insertion hole 281 in the center of the retaining plate 280, and the tip thereof is inserted. By caulking, the rotary knob 100 is pivotally attached to the first case 10. At this time, the click ball 271 elastically contacts the click engaging portion 13 of the first case 10.

  Next, the circuit board 150 is housed and attached in the first case 10. At this time, the sliding booklet 131 of the slider 130 attached to the rotary knob 100 makes elastic contact with the sliding contact pattern 153 of the circuit board 150. The slider 130 and the sliding contact pattern 153 constitute detection means. At the same time, the end portions of the plurality of terminals 21 that are insert-molded in the first case 10 and facing the second case 50 are inserted into the terminal mounting holes 157 of the circuit board 150 and protrude from the opposite side. Then, the end portion of each protruding terminal 21 and the land portion 159 are soldered with solder 300 (see FIG. 2).

  Next, the light guide 200 is housed and attached in the first case 10. At this time, as shown in FIG. 9, the light guide 200 covers the entire circumference of the circuit board 150, and the contact portion 203 surrounds the entire circumference of the surface of the circuit board 150 to which the electronic component 155 is attached. Abuts against the substrate surface. At this time, the illumination unit 205 of the light guide 200 is inserted into the groove 117 of the rotary knob 100. That is, the illumination unit 205 is located on the back side of the knob operation surface 105 of the rotary knob 100.

  Next, the second case 50 is put on the side of the first case 10 to which the circuit board 150 or the like is attached, and each locking claw 51 of the second case 50 is snapped into each second case locking hole 23 of the first case 10. The first and second cases 10 and 50 are integrated with each other by in-type engagement. At this time, the drainage guide protrusion 211 of the light guide 200 is inserted into the drainage port 59 of the second case 50.

  Next, the light guide member 260 is inserted from the lower side of the third case 250, and the third case 250 is inserted into the light guide hole 253 of the third case 250 with the insertion portion 261 of the light guide member 260 inserted. The first case is inserted over the second case 10, 50, and the third case locking portions 53 of the second case 50 are locked to the respective locking portions 255 of the third case 250 in a snap-in manner. Thus, the first, second, and third cases 10, 5, and 250 (these are collectively referred to as “case”) are integrated. At this time, a part of the knob operation surface 105 of the rotary knob 100 is exposed from the opening 251 of the third case 250. Thereby, the rotary electronic component 1 is completed. The above assembling procedure is an example, and it goes without saying that the assembly may be performed using other various assembling procedures.

  In the rotary electronic component 1 assembled as described above, when the rotary knob 100 is rotated by operating the knob operation surface 105 exposed to the opening 25 with a finger or the like, the sliding booklet 131 of the slider 130 is turned into a circuit. It slides on the sliding contact pattern 153 of the substrate 150, and its detection output changes. At the same time, the click ball 271 engages and disengages from the unevenness of the click engagement portion 13 of the first case 10, thereby generating a click feeling.

  On the other hand, when the light emitting element 155a is turned on, most of the light travels in the upward direction (direction perpendicular to the surface of the circuit board 150), enters the light guide 200, and most of the light is collected by the light collecting unit 208. Later, the light is reflected by the light reflecting portion 207 and travels upward, and further reflected by the upper end portion of the light guide 200 toward the illuminating portion 205, whereby the third case 250 (around the opening 251) and the rotary knob 100 are operated. The surface 105 is illuminated from the back side thereof, and the display portion 257 of the third case 250, the insertion portion 261 of the light guide member 260, and the illumination portion 123 of the rotary knob 100 are illuminated brightly.

  When water (liquid) is splashed from the upper part of the third case 250 (for example, when the cup falls down and all of the water is spilled), the water is operated by the knobs of the opening 251 of the third case 250 and the rotary knob 100. It enters into the case through the gap between the surfaces 105. A part of the infiltrated water tends to enter one side of the circuit board 150 on which the electronic component 155 is mounted and the other side on which the sliding contact pattern 153 is formed.

  Then, the water that is about to enter the one surface side of the circuit board 150 does not enter the surface of the circuit board 150 because the surface of the circuit board 150 is covered with the light guide body 200. It flows along the outer surface of 200. Accordingly, it is possible to prevent water from entering the electronic component 155 covered with the light guide body 200. In the case of the rotary electronic component 1, since the contact portion 203 of the light guide 200 is in contact with the surface of the circuit board 150 surrounding the electronic component 155, the electronic component 155 can be reliably prevented from drip. In particular, in this example, since the contact portion 203 of the light guide 200 is provided so as to contact the surface of the circuit board 150 surrounding the entire circumference of the electronic component 155, the drip-proof effect is further increased. As described above, the infiltrated water flows on the outer surface of the light guide 200 instead of the surface of the circuit board 150 and is drained to the outside from the drain port 59 of the second case 50. Since the drain guide groove 209 is provided on the surface of the light guide 200, water is smoothly collected at the drain port 59 and guided to the drain port 59 side by the drain guide protrusion 211.

  On the other hand, the water that is about to enter the other surface side of the circuit board 150 is an arc surface of the illumination part 205 of the light guide 200 that extends from the end 151a (see FIG. 2) of the circuit board 150 to the other surface side. Are separated into left and right, thereby being guided in a direction away from the detecting means including the sliding contact pattern 153 and the slider 130 and moving downward, and drained to the outside from the drain port 25 of the first case 10. That is, the illumination unit 205 provided in the light guide 200 detects the water that has entered the groove 117 of the rotary knob 100 from the opening 251 of the third case 250 simultaneously with the function of illuminating the knob operation surface 105 of the rotary knob 100. It also has a function to prevent drip by guiding it away from the means.

  As described above, according to the rotary electronic component 1, in addition to the function of guiding light to the light guide 200, the drip-proof function of the electronic component 155 (including the light emitting element 155 a) attached to the circuit board 150. Can also be included. That is, it is possible to effectively prevent the electronic components from drip-proof without increasing the number of components.

  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. Note 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, in the above example, the electronic component is mounted on one surface of the circuit board and the rotary knob is disposed on the other surface side. However, the rotary knob is mounted on one surface side of the circuit board, that is, the electronic component. It is also possible to provide a detecting means that is arranged on the same surface side and that changes the output according to the rotation of the rotary knob between the rotary knob and the circuit board.

In the above example, the case is constituted by three parts of the first, second, and third cases, but the case may be constituted by one part or a plurality of parts other than the three parts. Various modifications can be made to the shape and structure of the light guide. For example, in the above example, the light guide is configured to cover all of one surface of the circuit board, but may be configured to cover a part. The light guide may be fixed to the circuit board by means such as press fitting. The light guide may be fixed to the second case instead of being fixed to the circuit board. Further, if not required, the contact portion of the light guide body need not be provided. In short, any structure that covers a desired electronic component to be drip-proof may be used .

  In the above example, the rotary electronic component is installed so that the opening of the case faces upward. However, the present invention is not limited to this, and the rotary electronic component may be installed obliquely upward. You may install it sideways.

1 Rotating electronic component (Rotating electronic component with illumination mechanism)
10 First case (case)
50 Second Case (Case)
100 Rotating knob 105 Knob operating surface 117 Groove 130 Slider (detection means)
150 Circuit board 153 Sliding contact pattern (detection means)
155a Light emitting device (electronic component)
155 (155b, c, d, e) Electronic component 200 Light guide 203 Abutting portion 205 Illuminating portion 250 Third case (case)
251 opening

Claims (4)

An electronic component is mounted on one surface of the circuit board, a rotation knob is disposed on the other surface side, and a detecting means for changing the output according to the rotation of the rotation knob is provided between the rotation knob and the circuit board. A circuit board and a rotary knob are accommodated in a case, a part of the outer periphery of the rotary knob is exposed from an opening provided in the case, and the exposed outer peripheral surface is used as a knob operation surface. A rotary electronic component with an illumination mechanism having a light guide that introduces light irradiated by the light emitting element and shines around the opening of the case or the knob operation surface of the rotary knob,
The light emitting element is included in an electronic component on one side of the circuit board,
The light guide is formed in a substantially box shape in which the surface on the circuit board side is released and covers an electronic component on one surface of the circuit board, so that the liquid that enters from the opening of the case A drip-proof structure for a rotary electronic component with an illumination mechanism, which prevents intrusion into the electronic component. A drip-proof structure for a rotary electronic component with an illumination mechanism according to claim 1,
A light reflecting portion that reflects light emitted from the light emitting element and an outer surface of the light guide that enters from the opening of the case on an outer surface of the light guide opposite to the circuit board. A drip-proof structure for a rotary electronic component with an illumination mechanism, characterized in that a drainage guide projection is provided so as to guide the drainage of the liquid flowing along the water . A drip-proof structure for a rotary electronic component with an illumination mechanism according to claim 2 ,
A drainage port for inserting the drainage guide projection is provided at a position facing the drainage guide projection of the case,
On the other hand, a drip-proof structure for a rotary electronic component with an illumination mechanism , wherein a drainage guide groove is formed on the outer surface of the light guide to collect liquid flowing along the outer surface on the drainage guide projection . A drip-proof structure for a rotary electronic component with an illumination mechanism according to claim 1, 2 or 3,
Before Kishirubekotai has an illumination portion formed by extending the opening-side portion of the case from the edge of the circuit board on the other side,
By inserting the illumination unit into a groove provided in the rotary knob, the knob operation surface of the rotary knob is illuminated from the back side, and liquid that enters the groove of the rotary knob from the opening of the case A drip-proof structure for a rotary electronic component with an illumination mechanism, wherein the drip-proof structure is guided in a direction left and right away from the detection means.

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