JPH1196830A - Light dimmer for lighting equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent thermal effects such as deformation and melting caused by heat generated by a dimmer used in lighting equipment, and to reduce the size. SOLUTION: A mounting plate (13) and an insulating plate (1) used for enclosing a dimming substrate (2) in a case (11).
In particular, the auxiliary heat radiating plate (1) having substantially the same plane shape as the outer shape of the case, so that a part of the heat radiating plate (10) integrally connected to the triac (8), which is particularly high in temperature, is brought into contact therewith.
4), the heat generated by the dimming substrate in the dimmer case is efficiently and uniformly transmitted to the mounting plate and the side surface of the case via the auxiliary heat radiating plate, so that the case is locally localized. Temperature can be prevented, so that thermal effects such as deformation and melting of the case due to heat are suppressed, and this efficient heat conduction reduces the size of the dimmer itself and improves the load capacity. Can be.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a dimmer used for adjusting a light amount of a lamp as a light source in a lighting fixture.

[0002]

2. Description of the Related Art Conventionally, a dimmer used for adjusting the amount of light of a lamp, which is a light source in a lighting apparatus, incorporates a dimming control semiconductor element such as a triac serving as a heating unit. To protect the dimming control semiconductor element inside the optical device, to enable reliable heat dissipation,
By increasing the size of the dimmer itself, a space is secured around the triac, etc., which becomes a heat generating part, or by forming slits for heat radiation in a part of the case that constitutes the dimmer, the occurrence of triac, etc. It is generally practiced to reduce the heat generated by the airflow of air. Particularly for triacs, which are high in temperature, this heat is radiated by connecting the triac and the mounting plate via a heat sink. Using the heat conduction by the plate, the heat generated by the triac is conducted to the mounting plate to prevent the temperature of the triac from rising.

[0003]

However, in the above-mentioned conventional device, in order to prevent a rise in temperature in a triac, which is to be incorporated in a dimmer, in particular,
By connecting the heat of the TRIAC to the mounting plate by connecting the TRIAC and the mounting plate via a heat sink, the heat can be dissipated to the mounting plate using the heat conduction by the heat sink to prevent the temperature from rising. The heat-dissipating plate integrated with the heat-dissipating plate is inferior in thermal conductivity and heat-dissipating property because it is made of iron, and the heat generated by the triac is efficiently transmitted to the mounting plate via the heat-dissipating plate. However, there is a problem that the temperature of not only the triac but also the entire dimmer becomes high.

[0004] For this reason, by changing the material of the mounting plate, which is integrally connected to the triac via the heat radiating plate, to a material having excellent heat conductivity, for example, aluminum or copper, the mounting plate may be inferior in heat conductivity. Although it is possible to solve the problem of triac failure and the high temperature of the dimmer as a whole, the mounting plate made of aluminum or copper can be used for mounting heavy objects such as switches. However, when the material of the mounting plate is changed to aluminum or the like, the mounting strength cannot be secured, and the mounting plate may be deformed or the switch may fall off. If the material of the plate is changed to copper, increase the manufacturing cost of the mounting plate, add the switch and mounting bracket separately, and manufacture the dimmer for the lighting equipment itself. There is also a problem that also led to a significant increase.

The present invention has been made to solve the above-mentioned drawbacks and problems of the prior art. With a simple structure, the heat generated inside the case can be efficiently dissipated to prevent deformation and melting due to a rapid temperature rise. In addition to improving the durability, the size of the case is reduced.

[0006]

To this end, a knob protruding and held outside through an auxiliary plate, a variable resistor integrally connected via a knob adapter, and a heat sink are integrated with the variable resistor. A light control board made of electronic components such as a micro switch and a triac electrically connected on a printed circuit board, and a case enclosing the light control board with an insulating plate and a mounting plate. An auxiliary heat radiating plate having substantially the same planar shape as the outer shape of the case is sandwiched between an insulating plate and a mounting plate used for sealing the heat radiating plate so that the heat radiating plate and a part thereof are in contact with each other.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A dimmer according to an embodiment of the present invention has the above-described configuration, so that a triac of a dimming board provided in a case constituting a dimmer of a lighting fixture generates heat. Even when the temperature rises, the heat of the triac is transmitted to the heat sink integrated with this triac, and the heat sink and the mounting plate are insulated between the mounting plate and the insulating plate so as to contact a part of the heat sink. Since the heat is transmitted to the sandwiched auxiliary heat radiating plate and the side surface of the case, the heat generated in the case constituting the dimmer can be radiated using a material with good heat conduction such as copper or aluminum. This allows efficient and uniform conduction to the mounting plate and the case that are in contact with the entire surface of the plate, preventing local rise in temperature of the case and preventing failure due to over temperature of electronic components. It is possible to suppress the influence of heat deformation or melting or the like over the scan.

Further, the auxiliary heat sink having the same shape as the outer shape of the case sandwiched between the mounting plate and the insulating plate in such a manner that the heat sink and a part of the heat sink are held in contact with each other can be used to prevent the temperature of the triac from becoming particularly high. A large amount of generated heat can be efficiently and uniformly conducted to the side of the mounting plate and the case, and furthermore, the auxiliary heat sink having substantially the same plane shape as the outer shape of the case is used. The capacity can be improved, and the dimmer for the lighting fixture itself is reduced in size, there is no gap between the case and the auxiliary heat sink, and at the time of construction, cut metal pieces etc. are prevented from entering the case, The dimming circuit is prevented from being damaged due to a short circuit between the printed board and the pattern, a short circuit between the REET legs of the electronic component, and the like, and the range of use thereof can be expanded.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. (1) is a dimmer for a lighting fixture according to an embodiment of the present invention. The dimmer (1) for a lighting fixture according to the embodiment of the present invention protrudes to the outside through an auxiliary plate (3) and is held. A variable resistor (6) integrally connected via a knob (4) and a knob adapter (5), and a heat sink (1)
0), a dimming board (2) made of electronic components such as a micro switch (7), a triac (8) and the like which are electrically connected on a printed board (9) together with the variable resistor (6); A case (1) enclosing the dimming substrate (2) together with the insulating plate (12) and the mounting plate (13).
1). (16) is a slot for installing a dimmer,
(17) is a plate mounting hole.

In the dimmer (1) for a lighting fixture according to an embodiment of the present invention, the insulating plate (1) used for enclosing the dimming substrate (2) in a case (11) is provided.
Between the 2) and the mounting plate (13), an auxiliary radiator plate (14) having a shape substantially the same as the outer shape of the case (11) and made of a material having good heat conductivity such as copper or aluminum is used. ) And a part of the radiator plate (10) integrally connected to the radiator plate so as to be in contact with the radiator plate.

Since the dimmer (1) for a lighting fixture according to an embodiment of the present invention has the above-described configuration, a lighting fixture including the dimmer (1) for a lighting fixture according to an embodiment of the present invention is provided. By using, even if the triac (8), especially the triac (8) of the dimming board (2) built in the case (11) constituting the dimmer (1) for the lighting fixture generates heat, The heat of the triac (8) is transmitted to the radiator plate (10) integrated with the triac (8) of the light control board (2), and the radiator plate to which the heat of the triac (8) is transmitted. (10) and the mounting plate (1
Since it is transmitted to the auxiliary heat radiating plate (14) sandwiched between 3) and the insulating plate (12) and the side surface portion (15) of the case (11), the lighting fixture according to the embodiment of the present invention is provided. The heat generated in the case (11) in which the dimmer (1) of (1) is constituted together with the dimming substrate (2) is transferred to the auxiliary radiator (1).
4) The conductive plate is efficiently and uniformly transmitted to the side surfaces of the mounting plate (13) and the case (11) in contact with the entire surface of the case (11), and the local area of the case (11) in which the light control board (2) is mounted. Since the temperature rise is prevented, it is possible to suppress a thermal effect such as a failure of the electronic component, deformation or melting of the case (11).

Furthermore, the mounting plate (13) used for enclosing the light control board (2) in the case (11) as described above.
A heat radiating plate (10) integrally connected to the high-temperature triac (8) and an auxiliary heat radiating plate (14) sandwiched so as to be in contact with a part thereof,
A large amount of heat generated from the particularly high-temperature triac (8) contained in the case (11) is efficiently and uniformly transmitted to the mounting plate (14) and the side portion (15) of the case (11). Because it is something that can be
The load capacity of the dimmer (1) can be improved, and the dimmer (1) for a lighting fixture can be reduced in size. The thickness of the auxiliary heat sink can be reduced by increasing or decreasing the load capacity. It is possible to respond to an accident by changing the material, and to expand the range of use.

[0013]

According to the above construction, the heat generated by the dimming substrate in the case constituting the dimmer can be efficiently and uniformly distributed to the mounting plate with which the auxiliary radiating plate contacts the entire surface. By transmitting to the side of the case, it is possible to prevent local temperature rise of the case, and to suppress the thermal effects such as deformation and melting due to heat of the case and knobs,
In addition, this auxiliary heat sink is made the same size as the case to prevent foreign substances from entering the case and prevent damage to the board.
Further, by this efficient heat conduction, the dimmer itself is reduced in size and the load capacity is improved, so that the dimmer has an excellent effect of being able to sufficiently expand its use and range.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a dimmer for a lighting fixture according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of a dimmer for a lighting device according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dimmer for lighting fixtures 2 Dimming board 3 Auxiliary plate 4 Knob 5 Knob adapter 6 Variable resistor 7 Micro switch 8 Triac 9 Printed circuit board 10 Heat sink 11 Case 12 Insulating plate 13 Mounting plate 14 Auxiliary heat sink 15 Side part 16 Slot for mounting dimmer 17 Plate mounting hole

Claims (1)

[Claims] 1. A knob which protrudes and is held outside through an auxiliary plate, a variable resistor which is integrally connected via a knob adapter, and a heat sink, and is electrically integrated with the variable resistor on a printed circuit board. It consists of a dimming board made of electronic components such as a microswitch and a triac to be connected, and a case enclosing the dimming board together with an insulating plate and a mounting plate, and is used in enclosing the dimming board in the case. A dimmer for a lighting fixture, comprising an auxiliary heat radiating plate having substantially the same planar shape as the outer shape of a case sandwiched between an insulating plate and a mounting plate so as to contact a heat radiating plate and a part thereof.