JP4752821B2 - Dimmer and method for manufacturing the dimmer - Google Patents

Description

  The present invention relates to a dimmer that performs dimming of an illumination load, and a method for manufacturing the dimmer.

2. Description of the Related Art Conventionally, there has been known a dimmer that is interposed between an AC power source such as a commercial power source and an illumination load and performs dimming of the illumination load (for example, Patent Document 1). This dimmer is a dimmer for dimming an illumination load inside a housing composed of a box-shaped body having an opening on the front side and a cover fixed to the opening of the body. A circuit block including electronic components constituting the circuit is accommodated. The circuit block is configured by mounting multiple electronic components such as variable resistors on a printed circuit board, and the operation axis of the variable resistor protrudes from the front of the housing, and an operation knob is attached to the tip of the circuit block. Has been. When the operation shaft is rotated via the operation knob, the dimmer adjusts the resistance value of the variable resistor according to the rotation amount of the operation shaft, and the incandescent lamp according to the change in the resistance value. Dimming control is performed.
Japanese Patent Laid-Open No. 11-16684

  Since the dimmer as described above is operated by rotating the operation shaft of the variable resistor via the operation knob, there is a possibility that the circuit block may rattle inside the housing when the operation knob is operated. . If the circuit block rattles inside the housing, the rattling is transmitted to an operator who operates the dimmer via the operation knob, which may impair the usability of the dimmer.

  In general, when manufacturing this type of dimmer, the process of housing the circuit block in the body and fixing the cover to the opening of the body is performed manually, so that the assembly accuracy is improved. There is a problem that variations tend to occur. When the assembly accuracy is low, the circuit block is likely to be loose with respect to the housing.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a dimmer capable of reducing variation in assembly accuracy and suppressing rattling of a circuit block during operation, and the dimmer. It is in providing the manufacturing method of a light controller.

In order to solve the above-mentioned problems, the inventions according to claims 1 and 2 include a box-shaped body that opens to the front side and a box-shaped cover that opens to the rear side and is fixed to the opening of the body. And a variable resistor having an operation shaft that projects from the front surface of the housing to the outside of the housing. A dimmer comprising a circuit block formed by mounting the electronic component on a printed circuit board and an operation knob attached to the operation shaft, wherein the cover protrudes inside the cover from the side. The gist of the invention is to have a plurality of side holding portions that contact the circuit block and a front holding portion that protrudes inside the cover and contacts the circuit block from the front.

  According to this configuration, the side holding portion provided on the cover contacts the circuit block from the side, and the front holding portion similarly provided on the cover contacts the circuit block from the front. Yes. Therefore, rattling of the circuit block with respect to the housing is suppressed. As a result, rattling of the circuit block during operation of the operation shaft via the operation knob is suppressed, so that the feeling of use of the dimmer is suppressed. Moreover, since the shakiness of the circuit block with respect to a housing | casing is suppressed, the load to the electronic component resulting from the vibration at the time of carrying a dimmer is reduced. Furthermore, when manufacturing the dimmer, the position of the circuit block in the housing is substantially determined by fixing the cover to the opening of the body so that the side holding part and the front holding part are in contact with the circuit block. Therefore, variation in assembly accuracy can be reduced.

According to one aspect of the present invention, prior Symbol circuit block includes a bottom portion and a first printed circuit board of the vertically disposed plate of the body, the body bottom and disposed parallel to the plate-like second printed A heat dissipating main body having a rectangular plate shape that is disposed perpendicularly to the first printed circuit board and parallel to the second printed circuit board and has a side holding recess at an end opposite to the first printed circuit board A heat radiating plate disposed on the front side of the second printed circuit board, wherein the plurality of side holding portions include a side holding portion engaged with the side holding recess, and the first A lateral holding portion that contacts the printed circuit board, and the front holding portion contacts the front surface of the heat radiating main body.

  According to this configuration, rattling of the circuit block with respect to the housing is further suppressed by engaging the side holding portion with the side holding recess provided in the heat dissipation main body portion. Further, the plurality of side holding parts include side holding parts that come into contact with the plate-like first printed circuit board, and the front holding part comes into contact with the front surface of the plate-like heat radiating main body part. The position of the circuit block is easily determined inside. Then, when the circuit block is accommodated inside the housing, the side holding portion is brought into contact with the first printed circuit board and the front holding portion is brought into contact with the heat radiating main body portion, thereby positioning the circuit block with respect to the housing. Can be performed more easily.

According to a second aspect of the invention, prior Symbol circuit block includes a first printed circuit board bottom and vertically disposed plate-like of the body, disposed in parallel with the bottom of the body penetrating in the thickness direction thereof A plate-like second printed circuit board having a plurality of press-fitting holes, a plurality of press-fittings disposed between the second printed circuit board and the cover, projecting toward the second printed circuit board, and press-fitted into the press-fitting holes, respectively. And a heat sink having a convex portion, and the gist is that the second printed board and the heat sink are sandwiched in the front-rear direction by the body and the cover.

  According to the configuration, the press-fitting convex portion formed on the heat sink is press-fitted into the press-fitting hole formed on the second printed board, and the second printed board and the heat sink are sandwiched between the body and the cover. . Therefore, for example, even when the size of the heat dissipation plate varies in the front-rear direction, the position of the heat dissipation plate relative to the second printed circuit board can be adjusted by changing the press-fitting amount of the press-fitting convex portion into the press-fitting hole. Is possible. Therefore, variation in assembly accuracy can be further reduced. Further, since the second printed circuit board and the heat radiating plate are sandwiched between the body and the cover, rattling of the circuit block with respect to the housing is further suppressed. As a result, rattling of the operation shaft operated via the operation knob is further suppressed, and the use feeling of the dimmer is further suppressed from being impaired.

According to a third aspect of the present invention, in the dimmer according to the first or second aspect , the body protrudes inside the body and faces the bottom of the body on the second printed circuit board. The gist of the present invention is to have a supporting convex part with which the abuts.

  According to this configuration, even if a force toward the bottom side of the body is applied to the circuit block, the support convex portion prevents the second printed circuit board from moving toward the bottom side. Therefore, the electronic component disposed on the opposite surface of the second printed circuit board is prevented from being excessively pressed by the second printed circuit board and the bottom portion of the body, so that the electronic component is applied to the second printed circuit board. It is suppressed that a load is applied to the connection part.

The invention according to claim 4 is housed in a housing having a box-shaped body that opens to the front side and a box-shaped cover that opens to the rear side and is fixed to the opening of the body, A dimming circuit for dimming an illumination load is configured, and a plurality of electronic components including a variable resistor having an operation shaft protruding from the front surface of the housing to the outside of the housing are mounted on a printed circuit board. A circuit block, and an operation knob mounted on the operation shaft, wherein the cover protrudes inward of the cover, and a plurality of side holding portions that contact the circuit block from the side, and A dimmer manufacturing method including a front holding portion that protrudes inward and abuts against the circuit block from the front , wherein the dimming circuit to the first printed circuit board and the second printed circuit board disposed on the same plane is provided. All before composing An electronic component is disposed and a heat dissipating plate is fixed to the first printed circuit board, and all the electronic components are electrically connected to the first printed circuit board and the second printed circuit board. A connection step in which a circuit block is completed; a molding step in which the shape of the circuit block is adjusted so that the first printed circuit board and the second printed circuit board are perpendicular to each other; and the circuit block is disposed inside the body. And a housing step in which the cover is fixed to the opening of the body.

  According to the method, in the arranging step, all electronic components constituting the dimming circuit are arranged on the first printed board and the second printed board, and in the connecting step, all electronic components constituting the dimming circuit are It is electrically connected to the first printed circuit board and the second printed circuit board. Therefore, since the connection of the electronic component to the first and second printed circuit boards does not extend over a plurality of processes, it is possible to suppress the load on the connection part of each electronic component with the printed circuit board when manufacturing the dimmer. can do. In addition, since all the electronic components constituting the dimming circuit are connected to the first and second printed circuit boards in one process, the circuit block is simply molded and accommodated in the housing after the connection process is completed. It's okay. Therefore, the dimmer can be easily manufactured.

The invention according to claim 5 is the method of manufacturing a dimmer according to claim 4 , wherein the second printed circuit board has a plurality of press-fitting holes penetrating in the thickness direction, A plurality of press-fitting protrusions protruding rearward; in the molding step, the press-fitting protrusions are loosely inserted into the press-fitting holes; and in the accommodating step, the first printed circuit board is perpendicular to the bottom of the body. The circuit block is housed inside the body so that the second printed circuit board is parallel to the bottom of the body, and the cover and the body are fixed as the cover is fixed to the body. The gist is that a pressing force in the front-rear direction is applied to the second printed circuit board and the heat radiating plate to press-fit the press-fitting protrusions into the press-fitting holes.

  According to this method, as the cover is fixed to the body, a pressing force in the front-rear direction is applied from the cover and the body to the second printed circuit board and the heat radiating plate, and the press-fitting protrusion is press-fitted into the press-fitting hole. Therefore, for example, even when the size of the heat dissipation plate varies in the front-rear direction, the position of the heat dissipation plate in the front-rear direction relative to the second printed circuit board is fixed by simply fixing the cover to the opening of the body. The press-fitting amount of the press-fitting convex portion into the press-fitting hole is adjusted. Therefore, variation in assembly accuracy can be further reduced. Further, since the second printed circuit board and the heat sink are sandwiched between the body and the cover, the second printed circuit board and the heat sink are rattled with respect to the casing, and the circuit block is rattling with respect to the casing. Sticking is further suppressed. As a result, rattling of the operation shaft operated via the operation knob is further suppressed, and the use feeling of the dimmer is further suppressed from being impaired.

  ADVANTAGE OF THE INVENTION According to this invention, the dimmer which can suppress the dispersion | variation in assembly | attachment precision and can suppress the shakiness of the circuit block at the time of operation, and the manufacturing method of this dimmer can be provided.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIG. 1, the three dimmers 1 are fixed to a mounting frame (not shown) for an embedded wiring fixture in which a decorative plate 2 is fixed on the front surface, and in the width direction ( It is connected in the short direction and the same in the horizontal direction in FIG.

  As shown in FIG. 2, the box-shaped housing 11 constituting each dimmer 1 is made of a thermosetting synthetic resin material, and is fixed to the body 12 disposed on the rear side and the front end of the body 12. And a cover 13 to be formed.

  The body 12 has a substantially rectangular parallelepiped box shape with an opening on the front side, and the width in the left-right direction is narrower than the width in the vertical direction. Then, at the front ends of the two side walls 21a and 21b on both sides in the width direction (short direction) of the body 12, a rectangular plate shape is located at a position slightly below the center in the vertical direction of the side walls 21a and 21b. The engaging convex parts 22 and 23 which form are projected and formed toward the front side. Further, rectangular engagement holes 24 and 25 are formed in the front side portions of the upper and lower side walls 21c and 21d of the body 12, respectively.

  Further, in the body 12, portions corresponding to the four sides extending in the front-rear direction of the body 12 are provided with body-side inclined portions 26 each having a shape such that the four sides are chamfered. Each body-side inclined portion 26 is inclined by a predetermined angle (for example, 45 °) with respect to two side walls on both sides of each body-side inclined portion 26 among the four side walls 21a to 21d.

  Each body-side inclined portion 26 includes a first inclined portion 26a and a second inclined portion 26b provided at a position on the rear side of the first inclined portion 26a and inside the body 12 relative to the first inclined portion 26a. It is composed of In the two body-side inclined portions 26 provided on both sides in the width direction of the upper side wall 21c of the body 12, the second inclined portion 26b is located on the rear side of the body 12 with respect to the substantially central portion in the front-rear direction of the body 12. It is formed in the site. On the other hand, the two body-side inclined portions 26 provided on both sides in the width direction of the lower side wall 21d of the body 12 are partly located on the rear side of the body 12 rather than the substantially central portion in the front-rear direction of the body 12. Therefore, the second inclined portion 26b is formed (see FIG. 4A). And as shown in FIG.5 (b), the 2nd inclination part 26b (FIG.4 (a)) inside the 1st inclination part 26a in the site | part of the back side of the four sides extended in the front-back direction of the body 12 is shown. 4), four support convex portions 27 projecting inward of the body 12 are formed. Each support convex portion 27 has a contact surface 27 a parallel to the bottom portion 28 of the body 12 on the opening side of the body 12, and the four contact surfaces 27 a are in the same plane parallel to the bottom portion 28.

  Further, as shown in FIG. 4A, a raised bottom portion 28a protruding partially forward is formed at a lower portion of the bottom portion 28 of the body 12, and the raised bottom portion 28a includes a body. A pair of electric wire insertion holes 29 arranged in the 12 width direction is formed. Further, as shown in FIG. 4B, a rectangular screw insertion hole 30 is formed in the rear side wall 21 d of the body 12 at a position closer to the rear.

  As shown in FIG. 2, the cover 13 has a substantially rectangular parallelepiped box shape whose rear side is open, and, like the body 12, has a width in the left-right direction narrower than its vertical width. Then, the engagement portion is located at a position slightly below the central portion in the vertical direction of each side wall 31a, 31b at the rear end of the side wall 31a, 31b on both sides in the width direction (short direction) of the cover 13. Engaging recesses 32 and 33 with which the mating projections 22 and 23 are engaged are formed, respectively. Each of the engagement recesses 32 and 33 is recessed in a rectangular shape according to the engagement protrusions 22 and 23. Further, on the upper and lower side walls 31c, 31d of the cover 13, engaging claws 34, 35 extending from the center in the width direction toward the rear side are formed respectively (about the engaging claws 35). (See FIG. 4 (b)). At the tip of the engaging claw 34 formed on the upper side wall 31c, an engaging protrusion 34a that protrudes upward and engages with the engaging hole 24 is formed, and formed on the lower side wall 31d. An engagement protrusion 35a that protrudes downward and engages with the engagement hole 25 is formed at the tip of the engagement claw 35 (see FIG. 4B). Furthermore, a circular operation hole 37 is formed at the center of the bottom portion 36 of the cover 13, and an LED exposure hole 38 is formed at a position above the operation hole 37 in the bottom portion 36 of the cover 13. .

  Further, as shown in FIG. 5A, the inner surface of one of the side walls 31a and 31b on both sides in the short direction of the cover 13 (the side wall on the right side when the housing 11 is viewed from the rear). The two side holding portions 41 and 42 are formed to protrude toward the inside of the cover 13, and the one side holding portion 43 is formed to protrude toward the inside of the cover 13 on the other side wall 31 b. Has been. The two side holding portions 41 and 42 provided on the side wall 31a project from the portions near the both ends in the vertical direction of the side wall 31a to the other side wall 31b side, and along the front-rear direction of the dimmer 1 The side wall 31a extends from the front end to the rear end. And the side holding part 43 provided in the side wall 31b protrudes from the center part of the up-down direction of the side wall 31b to one side wall 31a side, and from the front end of the side wall 31b to the substantially center part of the front-back direction of the side wall 31b. It extends.

  Further, on the inner side surface of the side wall 31a, the front holding portion 44 faces the inside of the cover 13 at a portion between the two side holding portions 41 and 42 and closer to the lower side holding portion 42. The protrusion is formed. The front holding portion 44 extends from the front end of the side wall 31a to the front of the center portion in the front-rear direction of the side wall 31a, and the height in the width direction of the cover 13 in the front holding portion 44 is the same as that in the side holding portions 41 and 42. The cover 13 is formed higher than the height in the width direction. Further, a contact holding surface 44a parallel to the bottom portion 36 of the cover 13 is provided at the rear end of the front holding portion 44, and from the portion of the contact holding surface 44a near the side wall 31a toward the rear side. The protruding auxiliary convex portion 44b is integrally formed. The height in the width direction of the cover 13 at the auxiliary convex portion 44 b is formed to be equal to the height in the width direction of the cover 13 at the side holding portions 41 and 42.

  Furthermore, front holding portions 45 and 46 are formed so as to protrude toward the inside of the cover 13 on both sides in the vertical direction of the side holding portion 43 on the inner side surface of the side wall 31b. Each of the front holding portions 45 and 46 extends from the front end of the side wall 31b toward the rear side, and is formed shorter than the side holding portion 43 in the front-rear direction. Further, at the rear ends of the front holding portions 45, 46, contact holding surfaces 45a, 46a parallel to the bottom portion 36 of the cover 13 are provided, and these contact holding surfaces 45a, 46a 44 is in the same plane as the abutment holding surface 44a. In addition, the height in the width direction of the cover 13 in the side holding portion 43 and the front holding portions 45 and 46 is formed to be equal to each other.

  As shown in FIG. 3, the cover 13 is configured so that the engagement protrusions 34 a and 35 a of the engagement claws 34 and 35 are disposed on the body 12 with the opening and the opening of the body 12 facing each other. By being snap-fit engaged with the engagement holes 24 and 25, the holes are fixed to the opening of the body 12 (see FIG. 4B). In the state where the cover 13 is fixed to the body 12, the engaging convex portions 22 and 23 are engaged with the engaging concave portions 32 and 33, respectively, thereby suppressing rattling of the cover 13 with respect to the body 12. Has been.

  As shown in FIG. 2, a plurality of electrons constituting a dimming circuit 52 (see FIG. 6) that performs dimming of an incandescent lamp 51 (see FIG. 6) as an illumination load is provided in the housing 11 as described above. A circuit block 53 having components is accommodated. The circuit block 53 includes a first printed board 54 and a second printed board 55, and the plurality of electronic components (such as the variable resistor 60) are mounted on the boards 54 and 55.

  Here, the dimming circuit 52 will be described with reference to FIG. The dimmer 1 includes a pair of external connection terminals Ta and Tb provided in the circuit block 53, and the dimming circuit 52 and an AC power source 56 such as a commercial AC power source and an AC current through the external connection terminals Ta and Tb. It is connected to a series circuit with an incandescent lamp 51 of the type. Between the external connection terminals Ta and Tb, a series circuit of a lighting switch SW1, a TRIAC TRC (in this embodiment, a mesa-type TRIAC), a choke coil L for removing power supply noise and a thermal fuse 57 is connected. A capacitor C1 used for power supply noise removal is connected between the rear stage of the lighting switch SW1 and the external connection terminal Tb. A series circuit of two resistors R1, R2 and an LED 58 is connected in parallel to the lighting switch SW1, and a diode D1 in the reverse direction is connected in parallel to the LED 58. A phase control circuit 59 is connected to both terminals T1, T2 of the triac TRC.

  In the phase control circuit 59, a series circuit of two resistors R3 and R4, a variable resistor VR1 and a capacitor C2 connected in parallel is connected between the terminals T1 and T2 of the triac TRC. Incidentally, the variable resistor VR1 is provided in the later-described variable resistor 60 together with the lighting switch SW1, and the variable resistor 60 is turned off from the lighting switch SW1 based on the turning operation of the operation shaft 60a (see FIG. 2). The switch is turned on and the resistance value of the variable resistor VR1 is changed to change from the minimum dimming to the maximum dimming. A resistor R5 and a trigger element (SBS) 61 are connected in series between a connection point N1 between the variable resistor VR1 and the capacitor C2 and the gate of the triac TRC.

  Between the connection point N2 between the parallel-connected resistors R3 and R4 and the variable resistor VR1 and the gate of the trigger element 61, a diode D2 and a resistor R6 whose anode is connected to the connection point N2 are connected in series. . The node N2 is connected to the cathode of the diode ZD1 in the two-stage Zener diodes ZD1 and ZD2, while the terminal T2 of the triac TRC is connected to the diode ZD4 in the two-stage Zener diodes ZD3 and ZD4. Are connected, and the anodes of the Zener diodes ZD2 and ZD3 are connected to each other. Further, a resistor R7 and a semi-fixed resistor VR2 are connected in series between the connection points N2 and N1.

  As shown in FIG. 2, in the housing 11, the first printed circuit board 54 having a rectangular plate shape is parallel to one side wall 21 a in the short direction of the body 12, and the bottom portion 28 of the body 12 and the bottom portion of the cover 13. 36, and is opposed to the side wall 21a of the body 12 and one side wall 31a in the short direction of the cover 13. Further, in the housing 11, the second printed circuit board 55 having a rectangular plate shape is disposed so as to be parallel to the bottom portion 28 of the body 12 and perpendicular to the first printed circuit board 54. Furthermore, the longitudinal directions of the first printed circuit board 54 and the second printed circuit board 55 coincide with the vertical direction of the dimmer 1.

  As shown in FIG. 7, on the first arrangement surface 54a opposite to the side wall 21a (see FIG. 2) of the body 12 in the first printed circuit board 54, heat dissipation for dissipating heat generated by the triac TRC or the like. The plate 63 is fixed, and the heat radiating plate 63 is disposed in the housing 11 between the cover 13 and the second printed circuit board 55. The heat radiating plate 63 has a U-shape when viewed from the side, and one end of the heat radiating plate 63 in the short direction (perpendicular to the paper surface in FIG. 7) is the first arrangement surface 54 a of the first printed circuit board 54. And is fixed to the first printed circuit board 54.

  The heat radiating plate 63 includes a first heat radiating piece 63a (heat radiating main body) having a rectangular plate shape, and a second heat radiating piece 63b and a third heat radiating piece 63b each having a rectangular plate shape extending rearward from the first heat radiating piece 63a. The heat dissipating piece 63c is integrally formed. Inside the housing 11, the first heat radiating piece 63 a is disposed in parallel with the bottom portion 28 of the body 12 and the bottom portion 36 of the cover 13, and the front surface thereof is in the same plane as the front end surface of the first printed circuit board 54. Has been placed. In addition, the width of the first heat radiation piece 63a in the direction orthogonal to the first printed circuit board 54 is slightly narrower than the distance between the side walls 21a and 21b on both sides in the width direction of the body 12 (see FIG. 2). Of the both ends in the width direction of the first heat radiating piece 63a, the end opposite to the first printed circuit board 54 is recessed toward the first printed circuit board 54 at a position that is substantially the center in the vertical direction. A side holding recess 63d is provided. In the housing 11, the side holding recess 43 d is engaged with the side holding portion 43 that protrudes inward from the side wall 31 b of the cover 13. The width of the dimmer 1 in the side holding recess 63d is slightly wider than the width of the dimmer 1 in the side holding portion 43, and the depth of the side holding recess 63d is The depth at which the tip of the engaged side holding portion 43 contacts the bottom surface of the side holding recess 63d, or a slight gap between the tip of the side holding portion 43 and the bottom surface of the side holding recess 63d. The depth is set so as to be formed. In addition, a through hole 63e penetrating in the thickness direction is formed at the center of the first heat radiating piece 63a, and the upper end portion of the first heat radiating piece 63a has a thickness near the first printed circuit board 54. An LED insertion hole 63f penetrating in the direction is formed (see FIG. 2).

  The second heat radiating piece 63b and the third heat radiating piece 63c are extended from both ends in the vertical direction of the first heat radiating piece 63a so as to be perpendicular to the first heat radiating piece 63a. And inside the housing | casing 11, while the 2nd thermal radiation piece 63b is arrange | positioned in parallel with these side walls 21c and 31c along the side wall 21c of the upper side of the body 12, and the upper side wall 31c of the cover 13, it is 3rd heat dissipation. The piece 63c is disposed along the lower side wall 21d of the body 12 and the lower side wall 31d of the cover 13 in parallel with the side walls 21d and 31d. Further, when viewed from the thickness direction of the first printed circuit board 54, the second heat radiation piece 63 b is along the upper end of the first printed circuit board 54. Further, the length in the front-rear direction of the dimmer 1 in the second heat radiating piece 63b and the third heat radiating piece 63c is set to be substantially equal to the length in the front-rear direction of the dimmer 1 in the first printed circuit board 54. Yes.

  As shown in FIG. 8, at the tip of the second heat radiating piece 63b, two press-fit convex portions 63g and 63h projecting toward the rear side are provided integrally with the second heat radiating piece 63b, and the third heat radiating piece 63b is provided. A press-fit convex portion 63i similar to the press-fit convex portions 63g and 63h protruding toward the rear side is provided integrally with the third heat radiating piece 63c at the tip of the piece 63c. Each of the press-fitting convex portions 63g to 63i has a shape as viewed from the thickness direction of the second heat radiating piece 63b and the third heat radiating piece 63c, and gradually increases in width from the base end toward the tip (the left and right sides of the dimmer 1). It has a trapezoidal shape with a narrower width. In addition, each press-fit convex portion 63g to 63i is formed to have a constant thickness in the same direction as the thickness direction of the second heat radiating piece 63b and the third heat radiating piece 63c. The shape of the cross section cut along the thickness direction of the printed circuit board 54 is a square shape.

  As shown in FIG. 7, the triac TRC is disposed and fixed on the lower outer surface 63 k of the third heat radiating piece 63 c of the heat radiating plate 63. The triac TRC is electrically connected to the first printed circuit board 54, and the fixing screw 64 is screwed into the fixing screw hole 63m provided in the third heat radiating piece 63c via the triac TRC. It is fixed to the third heat radiating piece 63c. A variable resistor 60 is disposed at the center of the first arrangement surface 54a of the first printed circuit board 54, and an operation shaft 60a of the variable resistor 60 is connected to the through hole 63e of the first heat radiation piece 63a. It protrudes from the front side. Furthermore, resistors R3 and R4, a semi-fixed resistor VR2, a capacitor C2 (see FIG. 9B), and an LED 58 are mounted in a region on the inside of the heat dissipation plate 63 on the first arrangement surface 54a. In addition, as shown to Fig.9 (a), LED58 protrudes in the front side of the 1st heat radiating piece 63a through the said LED penetration hole 63f. Further, resistors R1, R2, R5, R6, and R7, diodes D1 and D2, Zener diodes ZD1 to ZD4, and a trigger element are provided on the first solder surface 54b that is the back surface of the first arrangement surface 54a in the first printed circuit board 54. 61 is mounted (see FIG. 6). These electronic components arranged on the first placement surface 54a and the first solder surface 54b of the first printed circuit board 54 are soldered on the first solder surface 54b, so that they are electrically connected to the first printed circuit board 54. Connected.

  As shown in FIG. 7, the annular choke coil L is disposed on a second disposition surface 55 a (opposing surface) facing the bottom portion 28 of the body 12 in the second printed circuit board 55. The choke coil L is disposed on the upper portion of the second placement surface 55 a and is mounted on the second printed circuit board 55 so that the axial direction thereof is orthogonal to the second printed circuit board 55. A thermal fuse 57 having a terminal 57a bent in an L shape is disposed on the second arrangement surface 55a. The thermal fuse 57 is arranged in such a manner that its terminal 57a is bent in an L shape so as to cover the central portion in the radial direction of the choke coil L and to be in contact with the end face of the choke coil L. Further, the capacitor C1 and the terminal block 65 are disposed at a position below the choke coil L on the second arrangement surface 55a, and the terminal block 65 holds the external connection terminals Ta and Tb, respectively. As shown in FIG. 4A and FIG. 4B, the external connection terminals Ta and Tb are respectively provided with tip portions of electric wires 66 inserted into the inside of the housing 11 from the electric wire insertion holes 29, respectively. The electric wires 66 are electrically connected by being pressed against the external connection terminals Ta and Tb by the screw 67 inserted through the screw insertion hole 30. And the series circuit of the incandescent lamp 51 and the alternating current power supply 56 is connected between the external connection terminals Ta and Tb via these electric wires 66.

  Each electronic component (choke coil L and the like) and external connection terminals Ta and Tb arranged on the second arrangement surface 55a are on the second solder surface 55b which is the back surface of the second arrangement surface 55a in the second printed circuit board 55. By being soldered, the second printed circuit board 55 is electrically connected.

  As shown in FIG. 8, the second printed circuit board 55 is formed with three press-fitting holes 55 c to 55 e corresponding to the three press-fitting convex portions 63 g to 63 i provided on the heat radiating plate 63. . Each of the press-fit holes 55c to 55e penetrates in the thickness direction of the second printed circuit board 55, and the shape viewed from the second solder surface 55b has a quadrangular shape. Moreover, each press-fit hole 55c-55e is formed in the square shape larger than the front-end | tip of the press-fit convex part 63g-63i inserted, and smaller than the base end of the press-fit convex part 63g-63i inserted.

  As shown in FIG. 9B, the first printed circuit board 54 and the second printed circuit board 55 as described above are electrically connected by three first to third lead wires 71 to 73. . As shown in FIG. 6, the first lead wire 71 is provided so as to connect the external connection terminal Ta and the lighting switch SW1, and the second lead wire 72 is connected so as to connect the lighting switch SW1 and the capacitor C1. Further, the third lead wire 73 is provided so as to connect the choke coil L and the triac TRC. 8 and 9A, the second printed circuit board 55 includes the first printed circuit board 55 so that the second solder surface 55b faces the tips of the second heat radiating piece 63b and the third heat radiating piece 63c. 54, and the press-fitting protrusions 63g to 63i are press-fitted into the corresponding press-fitting holes 55c to 55e, respectively.

  As shown in FIG. 7, in the circuit block 53 accommodated in the housing 11, two side holdings provided on the side wall 31 a of the cover 13 are provided on the first solder surface 54 b (see FIG. 9A). The tips of the portions 41 and 42 are brought into contact with each other, and the side holding portion 43 provided on the side wall 31b of the cover 13 is engaged with the side holding recess 63d provided on the first heat radiating piece 63a. That is, the height in the width direction of the cover 13 in the side holding portions 41 and 42 is the first printed circuit board constituting the circuit block 53 in which the tips of the side holding portions 41 and 42 are accommodated in the housing 11. The height is set so as to be in contact with the first solder surface 54b. Moreover, in the circuit block 53 accommodated in the housing | casing 11, the contact holding surfaces 44a-46a of the front holding parts 44-46 provided in the cover 13 on the front surface of the 1st heat radiating piece 63a (FIG. ))) And the four corners of the second arrangement surface 55a of the second printed circuit board 55 are in contact with the contact surfaces 27a of the support protrusions 27 provided on the body 12, respectively. The abutment holding surface 44a abuts not only on the front surface of the first heat radiating piece 63a but also on the front end surface of the first printed circuit board 54, and the auxiliary convex portion 44b (see FIG. 5A) has the first solder. It abuts on the surface 54b. The press-fit protrusions 63g to 63i are formed by the front holding portions 44 to 46 of the cover 13 and the front holding portions 44 to 46 of the cover 13 along with the relative movement of the body 12 and the cover 13 in the front-rear direction when the cover 13 is fixed to the opening of the body 12. When the support convex part 27 of the body 12 presses the heat sink 63 and the second printed board 55 in the front-rear direction, they are press-fitted into the corresponding press-fitting holes 55c to 55e, respectively. Therefore, the heat sink 63 and the second printed circuit board 55 are sandwiched between the front holding portions 44 to 46 of the cover 13 and the support convex portion 27 of the body 12.

  As shown in FIG. 7, a bottomed cylindrical operation knob 81 is integrated with the tip of the operation shaft 60a of the variable resistor 60 protruding forward from a through hole 63e provided in the first heat radiation piece 63a. It is attached so that it can rotate. As shown in FIG. 2, the operation knob 81 has a diameter smaller than the inner diameter of the operation hole 37 provided in the cover 13, and the opening of the operation knob 81 has a radially outer side. A flange 81 a that extends toward the outside and has an outer diameter larger than the inner diameter of the operation hole 37 is integrally formed. An operation knob 81 mounted on the operation shaft 60 a of the variable resistor 60 housed in the housing 11 protrudes from the operation hole 37 to the front side of the housing 11. Then, by rotating the operation knob 81, the operation shaft 60a is rotated, and the lighting switch SW1 (see FIG. 6) is switched from OFF to ON (or switched from ON to OFF). The resistance value of the variable resistor VR1 is changed according to the rotation amount (operation amount) of the operation shaft 60a.

  As shown in FIGS. 6 and 1, in the dimmer 1 configured as described above, when the lighting switch SW <b> 1 is off, the incandescent lamp 51 is not supplied with power from the AC power source 56 and is turned off. Thus, the LED 58 exposed from the LED exposure hole 38 provided in the cover 13 is lit by receiving its power supply.

  On the other hand, when the operation knob 60 is rotated to rotate the operation shaft 60a and the lighting switch SW1 is turned on, the LED 58 is turned off and the AC voltage from the AC power source 56 is applied between the terminals T1 and T2 of the triac TRC. And applied to the phase control circuit 59. In the phase control circuit 59, a trigger signal having a timing based on the time constant of the variable resistor VR1 and the capacitor C2 is output to the gate of the triac TRC. In this case, if the resistance value of the variable resistor VR1 is changed by rotating the operation shaft 60a via the operation knob 81, the phase of the trigger element with respect to the voltage waveform of the AC power supply 56 changes, and the resistance value increases. Then, the phase of the trigger signal changes in the direction of being delayed. The triac TRC is turned on for a half-wave period from the input of the trigger signal, and supplies a current for lighting to the incandescent lamp 51 during the on-period. When the resistance value of the variable resistor VR1 is changed, the phase of the trigger signal with respect to the AC voltage waveform changes, and the on period of the triac TRC becomes longer or shorter. Thus, the dimming of the incandescent lamp 51 is performed by changing the load current to the incandescent lamp 51 by lengthening the ON time of the triac TRC.

Next, the manufacturing method of the light controller 1 comprised as mentioned above is demonstrated. The dimmer 1 is manufactured through an arrangement process, a separation process, a connection process, a molding process, and a housing process.
First, in the arrangement step, as shown in FIGS. 10A and 10B, all the electronic components and the heat radiating plates constituting the light control circuit 52 with respect to the first printed board 54 and the second printed board 55. 63 is arranged. At this time, the first printed circuit board 54 and the second printed circuit board 55 are arranged on the same plane and are integrated by a support frame 91 provided on the outer periphery. 10A and 10B, the first printed circuit board 54 and the second printed circuit board 55 are shown with the connection pieces connecting to the support frame 91 omitted. Resistors R1, R2, R5, R6, and R7, diodes D1 and D2, Zener diodes ZD1 to ZD4, and trigger element 61 are bonded onto the first solder surface 54b of the first printed circuit board 54 in this state. Further, on the first arrangement surface 54a of the first printed circuit board 54, the capacitor C2, the LED 58, the resistors R3 and R4, the semi-fixed resistor VR2, the triac TRC, the variable resistor 60, and the heat sink 63 are arranged, and the second On the second arrangement surface 55a of the printed circuit board 55, the capacitor C1, the choke coil L, the thermal fuse 57, and the terminal block 65 for holding the external connection terminals Ta and Tb are arranged. Further, the first to third lead wires 71 to 73 are arranged so as to straddle the first arrangement surface 54 a of the first printed circuit board 54 and the second arrangement surface 55 a of the second printed circuit board 55. The radiator plate 63 is arranged on the first arrangement surface 54 a together with the variable resistor 60, and the triac TRC is arranged on the first arrangement surface 54 a through the radiator plate 63.

  Next, a separation step is performed, the support frame 91 is removed from the first printed board 54 and the second printed board 55, and the first printed board 54 and the second printed board 55 are separated. Note that, after the separation step is completed, the first printed circuit board 54 and the second printed circuit board 55 are kept in a state of being arranged on the same plane.

  Next, a connecting step is performed, and soldering is performed on the first solder surface 54b of the first printed circuit board 54 and the second solder surface 55b of the second printed circuit board 55, and the first printed circuit board 54 and the second printed circuit board Electronic components arranged with respect to 55 are electrically connected to the substrates 54 and 55, respectively. In this connection process, the circuit block 53 is completed.

  Next, a molding process is performed, and the first printed circuit board 54 is bent while bending the first to third lead wires 71 to 73 as shown in FIGS. 8, 9A and 9B. Thus, the shape of the circuit block 53 is adjusted so that the second printed circuit board 55 is vertical. At this time, the second printed circuit board 55 is disposed so that the second soldering surface 55b faces the second heat radiating piece 63b and the tip of the third heat radiating piece 63c of the heat radiating plate 63 fixed to the first printed circuit board 54. In addition, the tip portions of the three press-fit convex portions 63g to 63i formed at the tips of the second heat radiating piece 63b and the third heat radiating piece 63c are three press-fit holes formed in the second printed circuit board 55. It is loosely inserted into 55c to 55e, respectively. Accordingly, the first printed circuit board 54 and the second printed circuit board 55 are positioned through the heat radiating plate 63. In addition, after completion | finish of a formation process, the press-fit convex parts 63g-63i are only loosely inserted with respect to the corresponding press-fit holes 55c-55e, and are not press-fitted.

  Next, a housing step is performed, and as shown in FIG. 7, the circuit block 53 is housed in the body 12, and the cover 13 is fixed to the opening of the body 12. At this time, the circuit block 53 is inserted into the body 12 from the second printed circuit board 55 side so that the second arrangement surface 55 a of the second printed circuit board 55 faces the bottom of the body 12. The circuit block 53 is directed toward the bottom portion 28 of the body 12 until the four corners of the second arrangement surface 55a of the second printed circuit board 55 abut on the abutment surface 27a of the support convex portion 27 provided inside the body 12. Inserted. Next, after the operation knob 81 is attached to the operation shaft 60 a, the cover 13 is fixed to the opening of the body 12. At this time, the tip of the two side holding portions 41 and 42 provided on the side wall 31a of the cover 13 facing the first solder surface 54b of the first printed circuit board 54 contacts the first solder surface 54b. Thus, the side holding portion 63 provided on the side wall 31b of the cover 13 is inserted into the side holding recess 63d provided in the first heat radiation piece 63a from the front side so that the side holding portion 43 is inserted from the front side. Moved. When the body 12 and the cover 13 are moved relative to each other along the front-rear direction so as to snap-engage the engagement claws 34, 35 with the engagement holes 24, 25, the front holding portions 44 to 46 and The heat sink 63 and the second printed circuit board 55 are pressed in the front-rear direction by the support convex portion 27. Accordingly, the press-fitting convex portions 63g to 63i are press-fitted into the corresponding press-fitting holes 55c to 55e. In the state where the cover 13 is fixed to the opening of the body 12, the contact holding surfaces 44a to 46a of the front holding portions 44 to 46 are in contact with the front surface of the first heat radiation piece 63a, respectively, and the second print The contact surfaces 27a of the support convex portions 27 are in contact with the four corners of the second arrangement surface 55a of the substrate 55, and the second printed circuit board 55 and the heat radiating plate 63 are sandwiched between the front holding portions 44 to 46 and the support convex portions 27. Has been. That is, the front holding portions 44 to 46 and the support convex portion 27 position the circuit block 53 in the front-rear direction with respect to the housing 11.

As described above, according to the present embodiment, the following operational effects are obtained.
(1) Inside the housing 11, the side holding portions 41 to 43 provided on the cover 13 abut against the circuit block 53 from the side, and the front holding portions 44 to 46 similarly provided on the cover 13 are front sides. To the circuit block 53. That is, the front ends of the side holding portions 41 and 42 are in contact with the first solder surface 54b of the first printed circuit board 54, and the side holding portion 43 is the end of the first heat radiation piece 63a opposite to the first printed circuit board 54. Further, the front holding portions 44 to 46 are in contact with the front surface of the first heat radiation piece 63a. Therefore, rattling of the circuit block 53 with respect to the housing 11 is suppressed by the side holding portions 41 to 43 and the front holding portions 44 to 46. As a result, rattling of the circuit block 53 during operation of the operation shaft 60a via the operation knob 81 is suppressed, so that the feeling of use of the dimmer 1 is suppressed. Moreover, since the rattling of the circuit block 53 with respect to the housing | casing 11 is suppressed, it is mounted on the electronic component (it mounted on the 1st printed circuit board 54 and the 2nd printed circuit board 55) resulting from the vibration at the time of conveying the light control device 1. The load on the variable resistor 60 and the like) is reduced. Further, when the dimmer 1 is manufactured, the cover 13 is fixed to the opening of the body 12 so that the side holding portions 41 to 43 and the front holding portions 44 to 46 are in contact with the circuit block 53. 11 can almost determine the position of the circuit block 53, so that variations in assembly accuracy can be reduced.

  (2) The side holding recesses 63d provided in the first heat radiating piece 63a are engaged with the side holding portions 43 provided on the side wall 31b of the cover 13, so that the circuit block 53 against the housing 11 is deformed. Shaking is further suppressed. Further, of the three side holding portions 41 to 43, the side holding portions 41 and 42 provided on the side wall 31a of the cover 13 are in contact with the first solder surface 54b of the plate-like first printed circuit board 54 and the front side. Since the holding portions 44 to 46 are in contact with the front surface of the plate-like first heat radiating piece 63 a, the position of the circuit block 53 is easily determined inside the housing 11. In the housing step of housing the circuit block 53 in the housing 11, the side holding portions 41 and 42 are brought into contact with the first solder surface 54 b of the first printed circuit board 54 and the front holding portions 44 to 46 are moved to the first. Positioning the circuit block 53 with respect to the housing 11 can be performed more easily by bringing it into contact with the front surface of the 1 heat dissipating piece 63a.

  (3) The press-fitting convex portions 63g to 63i formed on the heat radiating plate 63 are press-fitted into the press-fitting holes 55c to 55e formed on the second printed circuit board 55, respectively, and the second printed circuit board 55 and the heat radiating plate 63 are It is sandwiched between the body 12 and the cover 13. Therefore, for example, even when the size of the heat dissipation plate 63 in the front-rear direction varies, heat dissipation to the second printed circuit board 55 can be achieved by changing the amount of press-fitting protrusions 63g to 63i into the press-fitting holes 55c to 55e. The position of the plate 63 can be adjusted. Therefore, variation in assembly accuracy can be further reduced. Further, since the second printed circuit board 55 and the heat radiating plate 63 are sandwiched between the body 12 and the cover 13, rattling of the circuit block 53 with respect to the housing 11 is further suppressed. As a result, rattling of the operation shaft 60a operated via the operation knob 81 is further suppressed, and the use feeling of the dimmer 1 is further suppressed.

  (4) Even if a force directed toward the bottom portion 28 of the body 12 is applied to the circuit block 53, the support convex portion 27 prevents the second printed circuit board 55 from moving toward the bottom portion 28 of the body 12. Accordingly, the electronic components (that is, the choke coil L, the thermal fuse 57, the terminal block 65, and the capacitor C1) arranged on the second arrangement surface 55a of the second printed board 55 are connected to the second printed board 55 and the bottom portion 28 of the body 12. Therefore, it is possible to prevent the electronic component from being excessively compressed in the front-rear direction, so that a load is not applied to the connection portion of the electronic component to the second printed circuit board 55.

  (5) In the arranging step, all electronic components constituting the dimming circuit 52 are arranged on the first printed board 54 and the second printed board 55, and in the connecting step, all electronic components constituting the dimming circuit 52 are arranged. It is electrically connected to the first printed circuit board 54 and the second printed circuit board 55. Therefore, since the connection of the electronic component to the first printed circuit board 54 and the second printed circuit board 55 does not extend over a plurality of processes, the connection of the electronic component with the printed circuit boards 54 and 55 is made when the dimmer 1 is manufactured. It can suppress that a load is applied to a part. Further, since all the electronic components constituting the dimming circuit 52 are connected to the first and second printed circuit boards 54 and 55 in one process, the circuit block 53 is molded and the housing is formed after the connection process is completed. It only needs to be accommodated in the body 11. Therefore, the dimmer 1 can be easily manufactured.

  (6) In the housing step, a pressing force in the front-rear direction is applied from the cover 13 and the body 12 to the second printed circuit board 55 and the heat radiating plate 63 as the cover 13 is fixed to the body 12, and the press-fitting convex portions 63g to 63i are formed. Each is press-fitted into the press-fitting holes 55c to 55e. Therefore, for example, even when the size of the heat dissipation plate 63 varies in the front-rear direction, the position of the heat dissipation plate 63 in the front-rear direction relative to the second printed circuit board 55 can be determined simply by fixing the cover 13 to the opening of the body 12. The press-fitting amounts of the press-fitting convex portions 63g to 63i to the press-fitting holes 55c to 55e are adjusted so as to be constant. Therefore, variation in assembly accuracy can be further reduced. Furthermore, since the second printed circuit board 55 and the heat radiating plate 63 are sandwiched between the body 12 and the cover 13, the second printed circuit board 55 and the heat radiating plate 63 rattle against the housing 11, and pull the housing. The rattling of the circuit block 53 with respect to the body 11 is further suppressed.

  (7) In the placement step, the first printed circuit board 54 and the second printed circuit board 55 are disposed on the same plane, so that all the electronic components constituting the light control circuit 52 can be easily placed on the boards 54 and 55. Can be arranged.

  (8) The press-fitting protrusions 63g to 63i are such that the shape of the second heat radiating piece 63b and the third heat radiating piece 63c viewed from the thickness direction gradually decreases in width from the base end toward the tip. It has a shape. Moreover, each press-fit hole 55c-55e is formed in the square shape larger than the front-end | tip of the press-fit convex part 63g-63i inserted, and smaller than the base end of the press-fit convex part 63g-63i inserted. Therefore, it is possible to easily perform loose insertion and press-fitting of the press-fit convex portions 63g to 63i into the press-fit holes 55c to 55e.

In addition, you may change embodiment of this invention as follows.
In the above embodiment, in the arrangement step, the connection step is performed after all the electronic components and the heat radiating plate 63 constituting the dimming circuit 52 are arranged on the first printed board 54 and the second printed board 55. The electronic components arranged with respect to the first printed board 54 and the second printed board 55 are electrically connected to the boards 54 and 55, respectively. However, the step of arranging the electronic components constituting the dimming circuit 52 on the first printed board 54 and the second printed board 55 may be performed across a plurality of steps. For example, in the first placement step, several electronic components constituting the dimming circuit 52 are placed on the first printed board 54 and the second printed board 55, and after performing the connecting step and the forming step, the placement step and The remaining electronic components may be connected to the first and second printed boards 54 and 55 by performing a connection process.

  In the above embodiment, four support convex portions 27 are provided inside the body 12. However, the number of support convex portions 27 provided in the body 12 is not limited to four, and may be three or less or five or more. Further, in the above-described embodiment, each support convex portion 27 is formed to protrude inside the body 12 by providing the second inclined portions 26 b on the four sides extending in the front-rear direction of the body 12. However, if the support convex part 27 is provided so that it may protrude inside the body 12, it will not be restricted to the structure of the said embodiment. For example, the support convex portion 27 may be provided so as to form a ridge on the inner peripheral surface of the body 12 having a configuration in which the body-side inclined portion 26 is not provided. Further, the support convex portion 27 is provided so as to protrude to the inside of the body 12 at the center portion in the vertical direction on the inner side surfaces of the side walls 21a and 21b and the center portion in the width direction on the inner side surfaces of the side walls 21b and 21d. Also good. The body 12 may be configured not to include the support convex portion 27.

  In the above-described embodiment, the three press-fit convex portions 63g to 63i are formed so that the shapes of the second heat radiating piece 63b and the third heat radiating piece 63c viewed from the thickness direction gradually increase in width from the base end toward the tip. Has a trapezoidal shape, and is press-fitted into the press-fitting holes 55c to 55e. However, the shape of each press fitting convex part 63g-63i is not restricted to this. For example, each press-fit convex portion 63g to 63i may have a polygonal column shape, a cylindrical shape, or the like. In this case, the press-fitting convex parts 63g to 63i are press-fitted into the press-fitting holes 55c to 55e, respectively, also at the tip part. Further, the shape and size of the press-fitting convex portions 63g to 63i may be set so as to be only inserted into the press-fitting holes 55c to 55e (that is, not press-fitted). In this case, by inserting the press-fitting convex portions 63g to 63i into the press-fitting holes 55c to 55e, the second printed board 55 can be easily positioned with respect to the first printed board 54 via the heat sink 63. Further, the number of press-fit convex portions 63g to 63i provided in the heat radiating plate 63 is not limited to three, and may be two or less or four or more. In this case, the second printed circuit board 55 is formed with the same number of press-fitting holes 55c to 55e as the number of press-fitting convex portions 63g to 63i provided in the heat radiating plate 63. Furthermore, the shape of the press-fit holes 55c to 55e may be appropriately changed to a polygonal shape, a circular shape, or the like according to the shape of the press-fit convex portions 63g to 63i. The circuit block 53 may have a configuration that does not include the press-fit convex portions 63g to 63i and the press-fit holes 55c to 55e.

  The heat radiating plate 63 may be configured not to include the side holding concave portion 63d. In this case, the side holding part 43 engaged with the side holding recessed part 63d may be configured such that the tip thereof is in contact with the end of the first heat radiation piece 63a opposite to the first printed board 54. , May be omitted.

  -In above-mentioned embodiment, the front holding parts 44-46 contact | abut to the front surface of the 1st thermal radiation piece 63a, respectively. However, as long as the front holding portions 44 to 46 are in contact with the circuit block 53 from the front, they may be in contact with portions other than the front surface of the first heat radiation piece 63a in the circuit block 53. For example, the front holding portions 44 to 46 may be configured to contact the front end surface of the first printed board 54. Further, the number of the front holding portions 44 to 46 provided in the cover 13 is not limited to three, and may be a plurality. Further, the front holding portions 44 to 46 may be provided on the inner side surfaces of the side walls 31 c and 31 d on both sides in the vertical direction of the cover 13 as long as they abut against the circuit block 53 from the front.

  In the above embodiment, the side holding portions 41 and 42 are in contact with the first solder surface 54b of the first printed circuit board 54, respectively, and the side holding portion 43 is in contact with the first heat radiation piece 63a. However, the side holding portions 41 to 43 contact the circuit block 53 from the side (from the side walls 21a to 21d and 31a to 31d between the bottom portion 28 of the body 12 and the bottom portion 36 of the cover 13). For example, the circuit block 53 may be in contact with a portion other than the first solder surface 54b of the first printed board 54 and the first heat radiation piece 63a. For example, the front holding portions 44 to 46 may be configured to come into contact with both end portions in the width direction of the second printed board 55 and the upper surface of the second heat radiation piece 63b. Moreover, the number of the side holding | maintenance parts 41-43 provided in the cover 13 is not restricted to three, What is necessary is just plural. Further, the side holding portions 41 to 43 may be provided on the inner side surfaces of the side walls 31 c and 31 d on both sides in the vertical direction of the cover 13 as long as they abut against the side of the circuit block 53.

  In the above embodiment, the first printed circuit board 54 is arranged in parallel with the side wall 21 a in the width direction of the body 12 and the side wall 31 a in the width direction of the cover 13. However, the first printed circuit board 54 may be arranged along the upper side wall 21 c of the body 12 and the upper side wall 31 c of the cover 13 so as to be perpendicular to the bottom portion 28 of the body 12 in the housing 11. . The first printed circuit board 54 is disposed along the lower side wall 21d of the body 12 and the lower side wall 31d of the cover 13 so as to be perpendicular to the bottom portion 28 of the body 12 in the housing 11. Also good. In this case, the heat radiating plate 63 is disposed such that the second heat radiating piece 63b and the third heat radiating piece 63c are parallel to the side wall 21a, 21b in the width direction of the body 12 and the side wall 31a, 31b in the width direction of the cover 13, respectively. Is done.

  In the above embodiment, three dimmers 1 are fixed to the mounting frame in which the decorative plate 2 is fixed on the front surface. Up to three dimmers 1 can be fixed to the mounting frame, but two or one dimmer may be fixed to the mounting frame and used.

  In the above embodiment, the dimmer 1 to which two electric wires are connected has been described as an example, but the present invention may be applied to a dimmer for three-way wiring.

The front view of the light controller connected and fixed to the attachment frame to which the decorative plate was fixed. The disassembled perspective view of a light controller. The perspective view of a dimmer. (A) is a rear view of a dimmer, (b) is a bottom view of a dimmer. (A) is a rear view of a cover, (b) is a front view of a body. The circuit diagram of a dimmer. A sectional view of a dimmer. The exploded perspective view of a circuit block. (A) is a top view of a circuit block, (b) is a side view of a circuit block. (A) And (b) is explanatory drawing for demonstrating the manufacturing process of a light control device.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Light control device, 11 ... Housing | casing, 12 ... Body, 13 ... Cover, 27 ... Support convex part, 28 ... Bottom part of body, 41-43 ... Side holding part, 44-46 ... Front holding part, 44b ... Auxiliary convex part as a side holding part, 51 ... Incandescent lamp as illumination load, 52 ... Dimming circuit, 53 ... Circuit block, 54 ... First printed circuit board, 55 ... Second printed circuit board, 55a ... As an opposing surface 2nd arrangement surface, 55c-55e ... press-fit hole, 57 ... thermal fuse as electronic component, 58 ... LED as electronic component, 60 ... variable resistor as electronic component, 60a ... operating shaft, 61 ... as electronic component Trigger element, 63 ... heat radiating plate, 63a ... first heat radiating piece as heat radiating main body, 63d ... side holding concave part, 63g to 63i ... press-fitting convex part, 71 to 73 ... lead wire as electronic component, 81 ... operation knob , C1, C2 ... Electronic Capacitors as products, D1, D2 ... diodes as electronic components, L ... choke coils as electronic components, R1 to R7 ... resistances as electronic components, Ta, Tb ... external connection terminals as electronic components, TRC ... electronic components Triac as VR2, semi-fixed resistor as electronic component, ZD1 to ZD4, Zener diode as electronic component.

Claims (5)

A box-shaped body that opens to the front side and a box-shaped cover that opens to the rear side and is fixed to the opening of the body; and
A plurality of electrons including a variable resistor housed in the housing and constituting a dimming circuit for dimming an illumination load and having an operation shaft protruding from the front surface of the housing to the outside of the housing A circuit block in which components are mounted on a printed circuit board;
An operation knob mounted on the operation shaft;
A dimmer with
The cover is then closed and a plurality of side holding portion abuts the protruding side to the circuit block to the inside of the cover, it protrudes to the inside of the cover and the front holding portion which abuts from the front to the circuit blocks,
The circuit block includes a plate-shaped first printed circuit board arranged perpendicular to the bottom of the body, a plate-shaped second printed circuit board arranged parallel to the bottom of the body, and a vertical line to the first printed circuit board. And a heat dissipating main body having a rectangular plate-like shape that is disposed in parallel with the second printed circuit board and has a side holding recess at the end opposite to the first printed circuit board. The front side of the second printed circuit board And a heat sink disposed on the
The plurality of side holding portions include a side holding portion that is engaged with the side holding recess and a side holding portion that contacts the first printed circuit board.
The light control device , wherein the front holding portion is in contact with a front surface of the heat radiating main body portion . A box-shaped body that opens to the front side and a box-shaped cover that opens to the rear side and is fixed to the opening of the body; and
A plurality of electrons including a variable resistor housed in the housing and constituting a dimming circuit for dimming an illumination load and having an operation shaft protruding from the front surface of the housing to the outside of the housing A circuit block in which components are mounted on a printed circuit board;
An operation knob mounted on the operation shaft;
A dimmer with
The cover has a plurality of side holding portions protruding inside the cover and coming into contact with the circuit block from the side, and a front holding portion protruding inside the cover and coming into contact with the circuit block from the front,
The circuit block includes a plate-shaped first printed circuit board disposed perpendicular to the bottom of the body, and a plate-shaped first printed circuit board having a plurality of press-fitting holes disposed in parallel with the bottom of the body and penetrating in the thickness direction. 2 printed circuit boards, and a heat radiating plate that is disposed between the second printed circuit board and the cover, has a plurality of press-fitting protrusions that protrude toward the second printed circuit board and are press-fitted into the press-fitting holes, respectively. The dimmer , wherein the second printed circuit board and the heat sink are sandwiched in the front-rear direction by the body and the cover . The dimmer according to claim 1 or 2 ,
The light control device according to claim 1, wherein the body includes a support protrusion that protrudes inward of the body and abuts a facing surface of the second printed circuit board that faces the bottom of the body. A box-shaped body that opens to the front side and a box-shaped cover that opens to the rear side and is fixed to the opening of the body; and
A plurality of electrons including a variable resistor housed in the housing and constituting a dimming circuit for dimming an illumination load and having an operation shaft protruding from the front surface of the housing to the outside of the housing A circuit block in which components are mounted on a printed circuit board;
An operating knob mounted on the operating shaft, and the cover protrudes inward of the cover from a side and abuts against the circuit block, and protrudes inward of the cover and protrudes from the front. A method of manufacturing a dimmer having a front holding portion that comes into contact with a circuit block,
Arrangement step in which all of the electronic components constituting the dimming circuit are arranged on the first printed board and the second printed board arranged on the same plane, and the heat sink is fixed to the first printed board. When,
A connection step in which all the electronic components are electrically connected to the first printed circuit board and the second printed circuit board to complete the circuit block;
A molding step in which the shape of the circuit block is adjusted so that the first printed circuit board and the second printed circuit board are perpendicular to each other;
A housing step in which the circuit block is housed in the body, and the cover is fixed to the opening of the body;
A method of manufacturing a dimmer, comprising : In the manufacturing method of the light controller of Claim 4 ,
The second printed circuit board has a plurality of press-fitting holes penetrating in the thickness direction,
The heat radiating plate has a plurality of press-fit convex portions protruding rearward,
In the molding step, the press-fitting convex portion is loosely inserted into the press-fitting hole,
In the housing step, the circuit block is housed in the body so that the first printed circuit board is perpendicular to the bottom of the body and the second printed circuit board is parallel to the bottom of the body. Along with the fixing of the cover to the body, a pressing force in the front-rear direction is applied from the cover and the body to the second printed circuit board and the heat radiating plate, and the press-fitting convex portion is press-fitted into the press-fitting hole. A method of manufacturing a dimmer characterized by the above .

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