JP2977586B2 - Light control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a light control device for controlling a lighting load, and more particularly to an arrangement of an electric component and a light control operation unit.

(Prior Art) A dimming device includes a built-in dimming control unit that changes power supplied to a lighting load in a housing. Generally, electric components forming the dimming control unit include: Heating elements such as semiconductor switching elements or anti-noise coils, that is, electric components having a large amount of heat generation are included.

Further, the dimmer has an operation unit for dimming operation, but conventionally, this operation unit is a rotary or slide type knob, and as a dedicated operation unit,
The structure was arranged at a position distant from the heating element. During use, the heat generated by the heating element heats the surface of the housing and the decorative plate covering the front of the housing, but the operation unit including the knob is separated from the heating element as described above and is preferably heated as described above. I try not to be.

By the way, as described in, for example, JP-A-59-5530 or JP-A-1-132096, a push-button-type switch is used for a dimming operation section, and an operating element (handle) for opening and closing the switch is provided. There is also known a dimming device in which an operation member (decorative handle) for operating the device is made large and also serves as a decorative plate on the front of a housing. The operation element is movably supported by a mounting frame on the front of the housing, and an operation member is fixed to the operation element. Further, in the dimming device described in the above publication, two pairs of switches are provided, and a pair of operation members and operation members are provided. The dimming device described in the above publication employs a structure in which a triac, which is a semiconductor switching element, is disposed between both operators.

However, in this conventional structure, since the operating member pressed by a finger also serves as a decorative plate, heat from the semiconductor switching element, which is a heating element, is easily transmitted to the operating member as well as the semiconductor switching element is located between the two operating elements. Therefore, heat is more easily transmitted to the operating member via the operating element, and the operating member is likely to be heated. Therefore, when the operator presses the operation member, the operator feels hot and feels discomfort.

(Problems to be Solved by the Invention) As described above, in the conventional light control device in which the light control operation unit is a push button type, the semiconductor switching element which is a heating element is disposed near the operation element. There is a problem that the operating member is likely to be heated and the operator feels discomfort.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a light control device that can reduce the possibility that an operation member is heated by heat of a heating element.

(Means for Solving the Problems) A dimming device according to the present invention includes a main body case having an open front surface and a support plate fixed to the front surface of the main body case. An elongated housing; a first circuit board on which a dimming switch is mounted and disposed on an opening side in the main body case; and a power supply to a lighting load is changed according to a signal from the dimming switch. At least a heating element among the electric components of the dimming control unit is mounted, and the heating element is located at one end in the longitudinal direction within the main body case and is disposed deeper than the first circuit board in the main body case. A second circuit board; an operator provided on the support plate of the housing at a position closer to the other end than the center in the longitudinal direction of the housing and closer to the center in the longitudinal direction, and configured to open and close the dimming switch. And coupled to the operator along the longitudinal direction of the housing. And an operating member.

(Operation) In the dimming device of the present invention, when the operation member is pressed during dimming, the dimming switch is opened and closed via the operation element, and the dimming inside the housing is performed according to a signal from the dimming switch. The light control unit changes the power supplied to the lighting load. And the first
The dimming switch is arranged on the circuit board, and the heating element of the dimming control unit is arranged separately on the second circuit board, and furthermore, the operation element and the heating element are arranged apart in the longitudinal direction of the housing. By doing so, it is difficult for the heat of the heating element to be transmitted to the operator,
In addition, by interposing the first circuit board between the support plate and the second circuit board, that is, between the operator and the heating element, it is possible to cut off the space where heat is conducted on the first circuit board. This makes it more difficult for the heat of the heating element to be transmitted to the operator, and reduces the possibility that the operating member becomes hot via the operator. In addition, while the operating member extends along the longitudinal direction of the housing, the operating element is disposed at a position closer to the longitudinal center of the housing, so that the stability of the support of the operating member is reduced. Often, this operating member is reliably operated.

(Embodiment) Hereinafter, the configuration of an embodiment of the light control device of the present invention will be described with reference to the drawings.

 First, electrical wiring will be described with reference to FIG.

In FIG. 1, reference numeral 1 denotes a light control device. An external AC power supply 3 is connected to an illumination load 4, that is, a light source lamp, and a dimming control unit 5 built in the dimming device 1.
The dimming control unit 5 includes a well-known phase control circuit of a bidirectional thyristor, and turns on / off the power supplied to the lighting load 4 and changes the power stepwise or continuously. It is.

Further, the dimming device 1 has a dimming switch 6 having a normally open contact connected to the dimming control unit 5. When the dimming switch 6 is closed for a predetermined time or less, the dimming control unit 5 turns on / off the power supply to the lighting load 4 and
When the dimming switch 6 is kept closed for a certain period of time or more, the dimming control unit 5 changes the power supplied to the lighting load 4. That is, if the dimming switch 6 is kept closed, for example, the power supplied to the lighting load 4 gradually increases, and when it reaches the maximum value, returns to the minimum value and increases again.

Next, regarding the mechanical configuration of the light control device 1,
This light control device 1 will be described with reference to FIG. 6 to FIG. 6. The light control device 1 is a kind of embedded wiring device, and has an elongated housing 11 whose longitudinal direction is a vertical direction embedded in a wall or the like. The housing 11 has an outer shell formed by a main body case 12 having an open front surface and a support plate 13 fixed to the front side of the main body case 12 with screws or the like, and a pair of front and rear circuit boards 14 and 15 is provided. Built-in. Various electric components 16 forming the dimming control unit 5 are mounted on the circuit boards 14 and 15. The circuit board 15 provided on the opening side of the main body case 14 is configured as a first circuit board, and the circuit board 15 provided on the back side in the main body case 14 is provided.
14 is configured as a second circuit board.

In particular, on the uppermost part of the rear circuit board 14, a noise prevention coil 17 and a semiconductor switching element 18 as heat generating elements, which are electric parts having a large heat generation among the electric parts forming the dimming control unit 5, are provided. Are arranged. Therefore, the noise prevention coil 17 and the semiconductor switching element 18 are located at the upper end in the housing 11. Further, a metal radiator plate 19 is joined to the switching element 18, and the radiator plate 19 is connected to an upper portion of the support plate 13 by a metal screw 20. This support plate 13 is made of metal and also serves as a heat radiating plate.

Further, a pair of terminals 21 is attached to the lowermost portion of the rear circuit board 14. These terminals 21 are accommodated in a terminal accommodating portion 22 formed at the lowermost portion in the main body case 12. The electric wires inserted into the through holes 23 formed in the rear surface of the main body case 12 so as to face the terminal storage portions 22 are to be locked and connected to the terminals 21. In addition,
Reference numeral 24 denotes a terminal cover that covers the terminals 21 from the front.

On the other hand, on the front surface of the circuit board 15 on the front side,
A light-emitting element 25 that is constantly lit to indicate the position of the light control switch 6 is disposed in the center, and a pair of normally open contacts 6a and 6b of the dimming switch 6 are disposed on the left and right sides of the lower part. These normally open contact switches electrically connected to the terminal 21
6a and 6b respectively have push button switches 31a and 31b that protrude forward and are urged forward, and are closed only when these switches 31a and 31b are pressed rearward.

In the support plate 13, a window 32 facing the light emitting element 25 is formed at the center, and the window 32
An operation element mounting opening 33 is formed at a position below the operation element.
The operator 34 is movably supported by the operator mounting opening 33. Specifically, the operator 34 is supported by a fulcrum (not shown) having an axial direction in the vertical direction so as to be able to swing left and right or to move forward and backward.
Are pressed rearward. The operator 34 is located below the vertical center of the housing 11, that is, on the vertical center opposite to the noise prevention coil 17 and the semiconductor switching element 18, and in the vertical center. It is located closer. Note that claw receiving portions 35 are formed on both left and right sides of the operation element 34, respectively.

Reference numeral 41 denotes an operation member also serving as a decorative cover called a wide handle.
Is mounted so as to be detachably fitted to the operator 34 and covers the support plate 13 from the front. In other words, two pairs of left and right substantially L-shaped claws 42 are formed at the lower portion of the rear rear surface of the operation member 41 so as to protrude therefrom for coupling with the operation member 34. Are engaged with the two claw receiving portions 35 in a detachable manner. Thereby, the operation member 41 is swingable in the left-right direction or movable back and forth integrally with the operation element 34. Further, a display window 44 facing the light emitting element 25 is formed at the center of the operation member 41. The center of the operation member 41 substantially coincides with the center of the housing 11 in the vertical and horizontal directions.

Further, reference numeral 46 denotes a frame-shaped plate for makeup.
Numeral 46 covers the periphery of the support plate 13 surrounding the operation member 41 and is joined to a wall surface or the like.

 Next, the operation of the above embodiment will be described.

By operating one operation member 41, the lighting load 4
The power supplied to the power supply can be turned on / off or changed. That is, when the operating member 41 is pressed for a short time with the finger F, the operating member 34 swings right or left together with the operating member 41, and the right or left normally open contacts 6a, 6
The switches 31a and 31b of b are pressed rearward, and one of the normally open contacts 6a and 6b closes for a short time. In response to the signals from the normally open contacts 6a and 6b, the dimming control unit 5 turns on the lighting load 4 if it has been turned off, and if the lighting load 4 has been turned on so far. This is turned off. Operation members
When the finger F is released from the contact 41, the operation member 41 returns to the normal state at all times, and the normally open contacts 6a and 6b are opened again.

Further, for example, when the operation member 41 is kept pressed and one or both of the normally open contacts 6a and 6b are kept closed, the brightness of the lighting load 4 gradually increases during that time, and returns to the minimum brightness when it reaches the maximum brightness. Then, the brightness gradually increases again. That is, the light control is repeated while the operation member 41 is kept pressed. When the finger F is released from the operation member 41 and the normally open contacts 6a and 6b are opened, the dimming state is completed,
Thereafter, the luminance of the illumination load 4 is maintained.

Note that semiconductor switching elements that generate a large amount of heat
The heat generated by 17 is radiated from the large supporting plate 13 made of metal via the heat radiating plate 19.

By the way, while the noise prevention coil 17 and the semiconductor switching element 18 which are heating elements are provided at the upper end portion in the housing 11, the operating element 34 to which the operating member 41 is coupled is a housing.
Because it is supported below the vertical center of 11,
The operator 34 is far away from the noise prevention coil 17 and the semiconductor switching element 18.

And the noise prevention coil 17 and the semiconductor switching element
The heat generated by 18 is directly transmitted from the support plate 13
Although transmitted to the operating member 41 via the, the above-described noise prevention coil 17, the semiconductor switching element 18, and the operating element 34
The direct heat conduction distance from the noise-preventing coil 17 and the semiconductor switching element 18 to the operator 34 is large because of the positional relationship with the control element 34. As a result, heat is hardly transmitted to the operation member 41, and the temperature rise of the operation member 41 is suppressed as much as possible. Further, heat is easily transmitted upward, but in the above-described embodiment, the housing
Since the noise prevention coil 17 and the semiconductor switching element 18 are provided at the upper end of the inside 11, the heat radiation effect is enhanced, and the heat is hardly transmitted to the operation member 41.

Further, the dimming switch 6 is mounted on the first circuit board 15,
Heating elements such as the noise prevention coil 17 and the semiconductor switching element 18 of the dimming control unit 5 are separately provided on the circuit board 14 of the light control unit 5, and further, the operation element 34 and the heating element are separated in the longitudinal direction of the housing 11. The heat generated by the heating element
34, and between the support plate 13 and the second circuit board 14, that is, between the operator 34 and the heating element.
Since the circuit board 15 is interposed, the space in which heat is conducted by the first circuit board 15 can be cut off, and the heat of the heat generating element can be more difficult to be transmitted to the operator 34. Thus, the operation member 41 can be prevented from becoming hot.

In this way, the operation member 41 directly pressed can be prevented from becoming hot as much as possible, so that the operator does not need to feel uncomfortable.

In addition, the operation member 41 is coupled to the operation element 34 at a position as close to the center of the operation member 41 as possible, so that the stability of the support is increased, and therefore, the operation is easy, but according to the above configuration, Actually, since the operation element 34 is disposed at a position near the center in the vertical direction of the housing 11, the stability of the support of the operation member 41 is good, and the operation member 41 is reliably operated.

(Effect of the Invention) According to the light control device of the present invention, the light control switch is provided on the first circuit board, and the heating element of the light control section is separately provided on the second circuit board. Since the operation element and the heating element are arranged apart from each other in the direction in which the body is adjusted, the heat of the heating element can be hardly transmitted to the operation element, and furthermore, between the support plate and the second circuit board, that is, the operation element First between heating element
Since the circuit board of the first embodiment is interposed, it is possible to cut off the space where heat is conducted in the first circuit board, and it is possible to further prevent the heat of the heat generating element from being transmitted to the operator, and to operate the operating member via the operator. Can be reduced from becoming hot.

[Brief description of the drawings]

The drawings show one embodiment of the light control device of the present invention.
FIG. 2 is a sectional view, FIG. 2 is an exploded perspective view, FIG. 3 is a perspective view, FIG. 4 is a front view excluding an operation member, FIG.
The figure is a front view, and FIG. 7 is a wiring diagram. 1 ... dimmer, 4 ... lighting load, 5 ... dimmer controller,
6 dimmer switch, 11 housing, 12 body case,
13 ... Support plate, 14 ... Circuit board configured as second circuit board, 15 ... Circuit board configured as first circuit board, 16 ... Electrical components, 17 ... Miscellaneous as heating element Coil prevention coil, 18: semiconductor switching element as heating element, 34: operating element, 41: operating member.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Junichi Takayanagi 180 Furuichi-cho, Maebashi-shi, Gunma Toshiba Equipment Co., Ltd. (56) References JP-A-63-21798 (JP, A) JP-A-57-26500 (JP) , A) Japanese Utility Model Application Sho 59-3438 (JP, U) Japanese Utility Model Application Hei 1-107899 (JP, U) Japanese Utility Model Application Hei 2-62698 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB (Name) H05B 37/02

Claims (1)

(57) [Claims] 1. A main body case having an open front surface and a support plate fixed to the front surface of the main body case, a case elongated in one direction along the front surface of the main body case; A first circuit board disposed on the opening side in the main body case; and at least heat generation among electric components of a dimming control unit that changes power supplied to a lighting load according to a signal from the dimming switch. An element is mounted, and the heating element is positioned at one end in the longitudinal direction within the main body case, and the first
A second circuit board disposed on the back side of the circuit board of the first embodiment; and a second position on the support plate of the case at a position closer to the other end than the center in the longitudinal direction of the case and closer to the center in the longitudinal direction. An operation member for opening and closing the dimming switch; and an operating member coupled to the operation member and extending in a longitudinal direction of the housing.