JP2002109949A - Lighting device of illumination equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a miniaturized lighting device of an illumination equipment having an improved heat radiation property. SOLUTION: A case 1 of a lighting device of an illumination equipment is composed of a body 2 and a cover 3. A rib 8 for heat radiation is formed integrally with and protrusively from the body 2. A circuit board 7 on which, circuit parts of an electronic stabilizer are mounted, having a notched part 9 formed at a part corresponding with a rib 8, is housed in the body 2 in the state that the rib 8 penetrates through the notched part 9. Out of the circuit parts mounted on the circuit board 7, transistors 5 with relatively high heat value are located facing each other in opposite direction interposing the rib 8. At the lower surface of the cover 3, a pair of ribs 17, 17 protruding to the body 2 side, are formed integrally with and protrusively from the cover 3. The transistors 5 are interposed between the rib 8 of the body 2 and the rib 17 of the cover 3, and the generated heat is conducted to the body 2 and the cover 3 through the ribs 8, 17, and radiated from the body 2 and the cover 3 to outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device having a lighting device for lighting a lamp housed therein.

[0002]

2. Description of the Related Art As this kind of lighting device, there is provided an illumination lighting device in which a circuit component of an electronic ballast is accommodated in a housing 1 as shown in FIG. The container 1 is composed of a substantially box-shaped body 2 formed of an insulating synthetic resin and having an open surface on one side, and a cover 3 for closing the opening of the body 2.

A circuit board 7 on which circuit parts of an electronic ballast are mounted is housed in the body 2. The circuit board 7 has a transistor 5 and a transformer 4 for switching a large current.
Circuit components that generate a relatively large amount of heat (heat-generating components)
And a circuit component 6 that generates a relatively small amount of heat as compared with the transformer 4 and the transistor 5. From the bottom surface of the body 2, a heat-dissipating rib 8 protrudes integrally with the body 2, and a cutout 9 for inserting the rib 8 is formed in a portion of the circuit board 7 corresponding to the rib 8. The plurality of transistors 5 are arranged back-to-back with a rib 8 protruding upward from the notch 9 interposed therebetween. Transistor 5 has rib 8 on flange
Pressed to. Thus, the heat generated by the transistor 5 is conducted to the body 2 via the rib 8, and is radiated from the body 2 to the outside air. The inside of the body 2 is sealed with a sealing resin 31 made of an addition reaction type liquid resin.

[0004] In some cases, a lighting device used in an environment where water drops are splashed thereon is required to have a waterproof property. As shown in FIG. 7, a lighting device having a sealed inside of a housing is also provided. ing. The body 1 of this lighting device is
The body 2 has upper and lower openings, and covers 3 and 3 attached to the upper and lower surfaces of the body 2, respectively. Sealing packings 35 and 35 are provided on contact surfaces between the body 2 and the covers 3 and 3, respectively. Is interposed. Inside the body 2, circuit boards 7a and 7b on which circuit parts 34 of an electronic ballast for lighting a discharge lamp are mounted. On the side surface of the body 2, an input / output coupler 32 for connecting to a power supply or a discharge lamp is formed integrally with the body 2. The coupler 32 has a cylindrical connection part 32a to which a connection coupler (not shown) connected to a terminal of a cable from a power supply or a discharge lamp is detachably connected, and a connection part is provided inside the connection part 32a. The terminal pin 33 is arranged so as to face the opening 32a. The terminal pin 33 is press-fitted and fixed in a hole penetrating the body 2, and the tip of the terminal pin 33 projecting into the body 2 is connected to the circuit board 7 a
Soldered.

Further, as an illumination lighting device in which the inside of the body is sealed, there is provided an illumination lighting device having a structure as shown in FIGS. 8 (a) and 8 (b). The body 1 of this lighting device
Is composed of a box-shaped body 2 having an open upper surface, and a plate-shaped cover 3 for closing the opening of the body 2. The body 2 and the cover 3 are integrated by inserting a fixing screw 36 into insertion holes formed in the body 2 and the cover 3 and screwing the fixing screw 36 protruding toward the body 2 into a nut (not shown). Is combined with

[0006] A circuit board 7 on which circuit parts of an electronic ballast are mounted is mounted inside the housing 1. A boss 42 protruding toward the body 2 is provided upright on the back surface of the cover 3.
The circuit board 7 is fixed to the cover 3 by inserting a fixing screw 43 into an insertion hole provided in the circuit board 7 and screwing the fixing screw 43 into a screw hole provided in the boss portion 42.

A recess 37 is provided at the upper end of the side surface of the body 2.
Is formed, and a seal packing 38 is attached to the recess 37. The seal packing 38 has three through holes 3
8a are provided, and lead wires 39 are inserted into the respective through holes 38a. A connector 40 is connected to one end of the lead wire 39, and the other end is introduced into the body 2 via a seal packing 38 and soldered to the circuit board 7.
A tension stopper 41 is attached to the lead wire 39, and when the lead wire 39 is pulled, the tension stopper 41 is attached.
Is in contact with the seal packing 38, thereby preventing a large force from being applied to the soldered portion of the lead wire 39.

[0008]

Among the above described lighting devices, in the lighting device shown in FIG. 6, the heat generated by the transistor 5 is transmitted to the body 2 through the rib 8, and is radiated from the body 2 to the outside air. However, since there is no path for radiating heat to the outside air via the cover 3, heat radiation is low, and in order to improve heat radiation, the heat radiation surface of the body 2 must be increased, and the entire device becomes large. There was a problem. Further, since the tip of the transistor 5 is sandwiched between the clips 30 in order to enhance the thermal coupling between the transistor 5 and the ribs 8 for heat dissipation, an operation of attaching the clip 30 is required, which increases the number of working steps and the manufacturing cost. There was also a problem that it became high. Further, the circuit components provided inside the body 2 are sealed by the sealing resin 31 and protected from water droplets or the like that have entered the body 2. However, in order to reliably protect the circuit components, the circuit components are required. Needs to be filled with the sealing resin 31 until it is buried, which increases the weight of the device,
There was a problem that the cost increased.

In the illumination lighting device shown in FIG. 7, the coupler 32 is formed integrally with the body 2 and the body 2 and the cover 3 are formed.
Although the inside of the case 1 is sealed by sealing the contact surface with the seal packing 35, a complicated shape must be formed because the coupler 32 is formed integrally with the body 2. There was a problem that the mold cost increased.
In addition, depending on the wear of the mold and the molding conditions, the coupler 3
If the size of the second member varies, there is also a problem that the sealing performance when the coupler is fitted cannot be ensured. Further, since the coupler 32 is formed integrally with the body 2, when the shape of the body 2 or the shape of the coupler 32 is changed, the entire shape must be changed. There was also a problem that it was not easy to respond to the change.

Further, in the illumination lighting device shown in FIG. 8, since the lead wire 39 is drawn out of the body 1, the lead wire 3
Therefore, the connector 40 must be connected to the terminal 9 and the tension stopper 41 must be attached to the terminal. Therefore, there is a problem that the number of assembly steps increases due to the connection operation of the connector 40 and the attaching operation of the tension stopper 41. At the time of assembly, the wire type and length of the lead wire 39 must be selected according to the intended use.
There is a problem that it takes time for production management and inventory management,
In addition, it is necessary to change the packing method depending on the type and length of the lead wire 39, so that handling of the product is troublesome. Further, since the shape of the seal packing 38 is complicated, there is a possibility that an increase in die cost and a decrease in yield may be caused, and there is also a problem that workability when the seal packing 38 is incorporated into the body 2 is poor.

FIG. 9 is a cross-sectional view of a seal groove 19 standardized according to JIS or the like. An O-ring is formed in the seal groove 19 formed in the body 2 constituting the body of the lighting device. Place a seal packing 18 like
A gap between the body 2 and a cover (not shown) attached to the body 2 is sealed. In this seal groove 19, the seal packing 18 is held in the body 2 by the elasticity of the seal packing 18 and the frictional force of the inner surface of the seal groove 19, so that the seal packing 18
If the surface on which the seal groove 19 is formed is turned downward in a state where the seal packing 19 is attached, the seal packing 18 may fall off.
Therefore, when performing the assembling work with the body 2 tilted, the work has to be performed while holding down the seal packing 18 by hand, and the workability is poor. Further, in order to prevent the portion outside the seal groove 19 from being damaged, it is necessary to increase the thickness d5 outside the seal groove 19 to some extent to secure the strength, and the width d4 of the side wall width d4 of the body 2 is reduced. There was also the problem of becoming larger.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an illumination lighting device which improves heat dissipation and reduces the size of the entire device. A third object of the present invention is to provide an inexpensive and easy-to-adaptive lighting device having a waterproof property and having a waterproof function. It is another object of the present invention to provide a lighting device in which waterproof performance is further improved in addition to the object of the third aspect of the present invention. It is still another object of the present invention to provide an illumination lighting device in which the assembling workability is improved in addition to the above object.

[0013]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a box-like shape which is open on one side,
A body accommodating the circuit components of the lighting device for lighting the lamp, a cover for closing the opening of the body, and heat absorption at a portion of the body corresponding to the first heat generating component having a relatively large heat generation among the circuit components A first rib for heat absorption is formed integrally with the body, and a second rib for heat absorption sandwiching the first heat generating component between the first rib and the first rib is formed integrally with the cover. The heat generated by the first heat-generating component is transmitted to the body and the cover via the first and second ribs, and is radiated to the outside from the body and the cover, so that the surface of the cover can be used as a heat-radiating surface. Therefore, heat can be dissipated more efficiently than in the case where heat is dissipated only from the body side, and the entire device can be prevented from increasing in size in order to secure a heat radiation area.

According to a second aspect of the present invention, in the first aspect of the present invention, at least one of the first and second ribs is provided on a surface facing the first heat-generating component. A guide surface that is inclined in a direction away from the first heat-generating component is provided. When the body and the cover are connected, the first heat-generating component moves along the guide surface and the first and second ribs are moved. Since the heat generating element is sandwiched between the first and second ribs, the heat generating element can be brought into contact with the first and second ribs without applying excessive force to the heat generating element. Conduction can be reliably transmitted to the body and the cover.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a coupler holding groove having one end opened to the opening side of the body is formed on a side surface of the body, and a seal groove is formed at an opening end of the side surface. Forming and arranging a coupler for external connection in the coupler holding groove, a cover seal part arranged in the seal groove to seal the gap between the body and the cover, and a coupler surface and coupler holding groove attached to the coupler surface A seal seal formed between the cover seal and the coupler seal, wherein the seal seal is formed integrally with the synthetic resin having elasticity. Since packing is used, one seal packing can simultaneously seal the gap between the cover and the body, and the gap between the coupler surface and the coupler holding groove. That. The seal groove is formed at the open end of the side surface of the body, and the cover holding groove is formed on the side surface of the body. And the plane including the coupler seal portion for sealing between the coupler holding groove and the cross section may intersect with each other, and the shape of the seal packing may be complicated, but the seal packing is formed of an elastic synthetic resin. Since the cover seal can be attached to the body with the cover seal twisted with respect to the coupler seal during assembly, the seal packing can be formed in a simple shape, and the mold for molding the seal packing can be used. The cost of the mold can be reduced, the yield of the seal packing can be improved, the molding accuracy can be stabilized, and the occurrence of defective sealing can be prevented. Further, since the coupler is provided separately from the body or the cover, it is possible to easily cope with a case where the specifications are changed with the coupler alone, the body alone, or the cover alone.

According to a fourth aspect of the present invention, in the third aspect of the present invention, a ridge protruding toward the body is formed on the surface of the cover facing the body with a predetermined gap between the ridge and the inner surface of the body. A sealing portion formed by enclosing a sealing resin filled in the body for sealing the circuit component into a gap between the inner surface of the body and the ridge portion and curing the sealing resin. The contact surface between the body and the cover can be double-sealed by the seal formed between the inner surface of the body and the ridge and the cover seal of the seal packing. Performance can be improved. In addition, by forming a seal between the inner surface of the body and the ridge of the cover, the contact area between the body and the cover increases, and the thermal conductivity between the body and the cover improves. Variations in the surface temperatures of the body and the cover are reduced, and the internal temperature can be efficiently radiated to the outside.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the second heat-generating component having a relatively large calorific value is disposed with a predetermined gap between the circuit component and the cover.
A heat conductive portion formed by wrapping the sealing resin into a gap between the cover and the second heat-generating component and curing the heat-cured resin; Since the heat is transmitted to the cover side through the portion and is radiated to the outside from the cover, the surface of the cover can be used as a heat radiating surface as in the first aspect of the present invention. Therefore, heat can be efficiently dissipated as compared with the case where heat is dissipated only from the body side, and the entire device can be prevented from being enlarged in order to secure a heat dissipation area.

According to a sixth aspect of the present invention, in the first aspect of the present invention, a seal groove in which a seal packing for sealing a gap between the body and the cover is provided at an open end of the side surface of the body. The cross-sectional shape is such that the groove width becomes wider from the bottom side to the opening side, and a slit part whose groove width is smaller than the outer dimension of the seal packing is provided at a key point of the seal groove, Since the seal packing is held by the portion, the seal packing does not fall out of the seal groove, and the workability of the assembling operation can be improved. In addition, the cross-sectional shape of the seal groove is such that the groove width becomes wider from the bottom side to the opening side, and the width of the bottom surface is smaller than the width of the opening of the seal groove. The width of the entire side wall can be reduced while securing the thickness of the portion outside the groove and the width of the portion of the seal groove with which the seal packing contacts, so that the overall size of the apparatus can be reduced.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1 and FIG. 2, the housing 1 of the illumination lighting device according to the present embodiment includes a substantially box-shaped body 2 having an open upper surface made of a synthetic resin having an insulating property. And a cover 3 formed in a substantially plate shape by resin. The body 2 and the cover 3
Insertion holes 10 formed in the body 2 and the cover 3, respectively;
The rivet 12 is inserted into the rivet 11, and the tip of the rivet 12 projecting downward from the body 2 in FIG. The body 2 and the cover 3 are connected by inserting an assembly screw through the insertion hole 11 of the cover 3 and screwing a tip of an assembly screw protruding from the insertion hole 10 of the body 2 into a nut (not shown). You may.

On the lower surface of the cover 3, a ridge 23 protruding toward the body 2 is provided along the inner surface of the body 2 with a predetermined gap between the cover 3 and the inner surface of the body 2. .

Inside the body 2, there is provided a circuit board 7 composed of a printed wiring board on which circuit parts of an electronic ballast (lighting device) for lighting a discharge lamp used for a headlight for a vehicle are mounted. Be mounted. The circuit board 7 includes a circuit component that generates a relatively large amount of heat, such as the transistor 5 and the transformer 4 that switch a large current, and a circuit component 6 that generates a relatively small amount of heat as compared with the transformer 4 and the transistor 5.
And have been implemented. An input coupler 13 and an output coupler 14 are mounted on a portion of the circuit board 7 facing one side surface of the body 2. The couplers 13 and 14 have cylindrical outer shells 13a and 14a, respectively.
A plurality of terminal pins 13b and 14b are respectively disposed inside a so as to face the openings of the outer shells 13a and 14a. Also, the outer surface of the outer shells 13a and 14a is
3c and 14c are protruded from each other at a predetermined interval.

Here, heat absorbing ribs (first ribs) 8, 8 are integrally provided on the bottom surface of the body 2 so as to project therefrom. Notches 9 are formed at portions of the circuit board 7 corresponding to the ribs 8 and 8.
The circuit board 7 is provided with ribs 8
Is placed in the body 2 while passing through. Further, among the circuit components mounted on the circuit board 7, the transistor 5 as the first heat-generating component, which is a circuit component having a relatively large heat value, is arranged back to back with the rib 8 interposed. On the other hand, a pair of heat-absorbing ribs (second ribs) 17, 17 protruding toward the body 2 are integrally provided with the cover 3 on the lower surface of the cover 3. Transistors 5, 5 arranged back to back are inserted into the site. On the opposing surfaces of the ribs 17, 17, there are formed guide surfaces 17a, 17a which are inclined in a direction away from the transistors 5, 5 toward the tip.

When the cover 3 is put on the body 2 from above, the transistor 5 moves along the guide surface 17a of the rib 17, and comes into contact with the heat absorbing ribs 8, 17, respectively. At this time, the thermal coupling between the transistor 5 and the ribs 8 and 17 is increased, and the heat generated by the transistor 5 is efficiently conducted to the body 2 and the cover 3 via the ribs 8 and 17 and is radiated from the body 2 and the cover 3 to the outside air. Because Therefore, heat can be dissipated more efficiently than in the case where heat is dissipated only from the body 2 side, and it is not necessary to increase the size of the body 2 to secure a heat radiation area, so that the overall size of the device can be reduced. Further, since the guide surface 17a is provided on the surface of the rib 17, when the body 2 and the cover 3 are connected, the transistor 5 moves along the guide surface 17a of the rib 17, so that an excessive force is applied to the transistor 5. Without this, the transistor 5 and the ribs 8 and 17 can be brought into contact. In the present embodiment, the guide surface 17 a is formed on the rib 17. However, a guide surface inclined toward the tip away from the transistor 5 may be formed on the rib 8 side, and the same effect as described above can be obtained. . Further, a plurality of concave grooves 2a running in the vertical direction are formed on the side surface of the body 2, and the heat radiation is enhanced by increasing the contact area with the outside air.

At the open end of the side surface of the body 2, a seal groove 19 into which a seal packing 18 described later is fitted is formed over the entire circumference. Further, one side surface of the body 2 facing the couplers 13 and 14 is opened to the upper surface side, and the coupler 1 is opened.
A substantially U-shaped coupler holding groove 15, 15 into which the third and the third 14 are inserted from above is formed, and recesses around the coupler holding grooves 15 and 15 are respectively fitted with the flanges 13 c and 14 c of the couplers 13 and 14. 16, 16 are formed.

The seal packing 18 is formed of a synthetic resin having elasticity, and is integrally connected to a rectangular frame-shaped cover seal portion 18a disposed in the seal groove 19 of the body 2 and one side of the cover seal portion 18a. U-shaped 2
And the coupler seal portion 18b. The cover seal portion 18a and the coupler seal portion 18b are formed in the same plane, and when the seal packing 18 is used, the seal seal portion 18b is used with the coupler seal portion 18b bent downward as shown in FIG. . The state before the coupler seal portion 18b is bent is shown by a broken line in FIG.

As described above, since the seal packing 18 in which the cover seal portion 18a and the coupler seal portion 18b are formed continuously and integrally is used, one seal packing 18 is used.
The gap between the body 2 and the cover 3 and the couplers 13 and 1
The gap between the four surfaces and the coupler holding grooves 15, 15 can be simultaneously sealed. The seal groove 19 is formed at the open end of the side surface of the body 2 and the cover holding groove 1 is formed.
Since the surfaces 5 and 15 are formed on the side surfaces of the body 2, the plane on which the cover seal portion 18a is disposed intersects with the plane on which the coupler seal portion 18b is disposed, and the shape of the seal packing 18 is complicated. However, since the seal packing 18 is made of a synthetic resin having elasticity, the cover seal portion 18a may be replaced with the coupler seal portion 1 during assembly.
Since the seal packing 18 can be attached to the body 2 in a twisted state with respect to 8b, the shape of the seal packing 18 can be formed in a simple shape, and the cost of the mold for forming the seal packing 18 can be reduced. The yield of the seal packing 18 is improved, the molding accuracy is stabilized, and the occurrence of sealing failure can be prevented. Further, since the couplers 13 and 14 are provided separately from the body 2 or the cover 3, it is possible to easily cope with a case where the specifications are changed with the couplers 13 and 14 alone, the body 2 or the cover 3 alone. .

Hereinafter, a method of assembling the lighting device will be briefly described. First, a rib 8 is inserted into the body 2
The insulating plate 20 is housed through the inside of Oa. Next, the circuit components of the electronic ballast and the couplers 13 and 14 are mounted on the circuit board 7, and two flanges 13 provided on the couplers 13 and 14 respectively.
The coupler seal portions 18b, 18b of the seal packing 18 are fitted between c, 14c. The ends of the coupler holding grooves 15, 15 of the body 2 are inserted between the two flanges 13c, 14c provided on the couplers 13, 14, and the ribs 8, 8 are inserted into the notches 9 of the circuit board 7. Thus, the circuit board 7
After being stored in the body 2, the cover seal portion 18 a of the seal packing 18 is fitted into the seal groove 19 of the body 2. Then, the inside of the body 2 is filled with a sealing resin 21 made of a reaction-curable liquid resin, and the cover 3
Is mounted, and the body 2 and the cover 3 are joined using the rivets 12 (see FIG. 5A).

At this time, the cover seal portion 18a is
And the cover 3 and the coupler seal portion 18.
The b and 18b are in elastic contact with the peripheral surfaces of the couplers 13 and 14 and the end surfaces of the coupler holding grooves 15 and 15, respectively, so that the inside of the housing 1 is sealed. In this state, as shown in FIG. 5 (b), the cover 3 is set to the lower side and the body 2 is set to the upper side and left for a predetermined time, and the gap between the inner wall of the body 2 and the ridge 23 of the cover 3, The sealing resin 21 is wrapped around the gap between the transformer 4 and the cover 3 which are the heat-generating components. Then, FIG.
After the cover 3 is on the upper side and the body 2 is on the lower side as shown in FIG.
1 is cured.

As described above, in the illumination lighting device of the present embodiment, the step of inverting the body 2 and the cover 3 and allowing the body 2 and the cover 3 to stand for a predetermined time before heating and curing the sealing resin 21 is provided. Transform the sealing resin 21 into the transformer 4 during the leaving period.
Between the cover 2 and the inner surface of the body 2 and the ridge 2
3 can be wrapped around the gap between
By curing the sealing resin 21 filled in the gap between the transformer 4 and the cover 3, a heat conducting part 22 for thermally coupling the transformer 4 and the cover 3 is formed,
The sealing portion 24 that seals the contact surface between the body 2 and the cover 3 is formed by curing the sealing resin 21 filled in the gap between the inner surface of the body 2 and the ridge 23.

Therefore, the heat generated by the transformer 4 is transmitted to the cover 3 via the heat conducting portion 22 and is radiated from the cover 3 to the outside air. Therefore, the surface of the cover 3 can be used as a heat radiating surface. The heat can be efficiently radiated as compared with the case where the heat is radiated from the outside to the outside air, and the entire device can be downsized. Further, by forming the seal portion 24, the contact surface between the body 2 and the cover 3 can be double-sealed by the cover seal portion 18a and the seal portion 24 of the seal packing 18, and the waterproof performance is improved. be able to. Further, by providing the seal portion 24, the contact area between the body 2 and the cover 3 is increased, and the thermal conductivity between the body 2 and the cover 3 is improved. It is possible to efficiently radiate the internal temperature to the outside while suppressing the internal temperature.

As shown in FIGS. 3, 4 (a) and 4 (b), the seal groove 19 provided in the body 2 is formed in a cross-sectional shape such that the groove width increases toward the opening side. ,
Protrusions 25 projecting inward are provided on both sides of the inner wall of the seal groove 19 at key points, and the width of the seal packing 1 is reduced.
8 is provided with a slit portion 26 which is narrower than the outer dimensions of the slit portion.
As shown in FIG. 4B, the interval between the slit portions 26 is smaller than the outer diameter of the seal packing 18, and
When the cover seal portion 18a of the seal packing 18 is fitted in the seal 9, the seal packing 18 is held by the slit portion 26, so that the seal packing 18 does not fall off from the seal groove 19, and the workability of the assembling operation is improved. .
If the cover seal portion 18a of the seal packing 18 comes off the seal groove 19, there is a possibility that the cover seal portion 18a may bite between the body 2 and the cover 3.
As a result, the cover seal portion 18a is held in the seal groove 19, so that there is no possibility that the cover seal portion 18a may become jammed, thereby reducing defective assembly. Further, since the opening side of the seal groove 19 is wider than the bottom side, the work of attaching the seal packing 18 to the seal groove 19 can be easily performed.

Further, since the cross-sectional shape of the seal groove 19 is an inverted trapezoidal shape such that the groove width increases from the bottom side to the opening side, the width of the bottom of the seal groove 19 is smaller than the width of the opening of the seal groove 19. And the width d2 of the entire side wall can be reduced while securing the thickness d1 of the portion outside the seal groove 19 and the width d3 of the portion of the seal groove with which the seal packing contacts, thereby reducing the entire device. Can be reduced in size. When the number of the slits 26 is large, it is difficult to install the seal packing 18. However, the slits 26 may be arranged only at important points such as near the corners of the body 2, and the workability of the installation work is improved. It does not get worse.

[0033]

As described above, the invention of claim 1 is a box-shaped one-sided opening, in which a circuit component of a lighting device for lighting a lamp is housed inside, and a cover for closing the opening of the body. Of the circuit components, a first heat absorbing component is provided at a portion of the body corresponding to a first heat generating component having a relatively large heat generation amount.
Are formed integrally with the body, and a second heat absorbing rib that sandwiches the first heat generating component between the first heat generating component and the first rib is formed integrally with the cover. The heat generated by the component is conducted to the body and the cover via the first and second ribs, respectively, and is radiated to the outside from the body and the cover, so that the surface of the cover can be used as a heat radiation surface. Therefore, compared with the case where heat is radiated only from the body side, heat can be radiated more efficiently, and the entire device can be prevented from being enlarged to secure a heat radiation area.

According to a second aspect of the present invention, in the first aspect of the present invention, at least one of the first and second ribs is provided on a surface facing the first heat-generating component. A guide surface that is inclined in a direction away from the first heat-generating component is provided. When the body and the cover are connected, the first heat-generating component moves along the guide surface and the first and second ribs are moved. Since the heat generating element is sandwiched between the first and second ribs, the heat generating element can be brought into contact with the first and second ribs without applying excessive force to the heat generating element. There is an effect that conduction can be reliably performed to the body and the cover.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a coupler holding groove whose one end is opened to the opening side of the body is formed on a side surface of the body, and a seal groove is formed at an opening end of the side surface. Forming and arranging a coupler for external connection in the coupler holding groove, a cover seal part arranged in the seal groove to seal the gap between the body and the cover, and a coupler surface and coupler holding groove attached to the coupler surface A seal seal formed between the cover seal and the coupler seal, wherein the seal seal is formed integrally with the synthetic resin having elasticity. Since packing is used,
With one seal packing, the gap between the cover and the body and the gap between the coupler surface and the coupler holding groove can be simultaneously sealed. The seal groove is formed at the open end of the side surface of the body, and the cover holding groove is formed on the side surface of the body. And the plane including the coupler seal portion for sealing between the coupler holding groove and the cross section may intersect with each other, and the shape of the seal packing may be complicated, but the seal packing is formed of an elastic synthetic resin. Since the cover seal can be attached to the body with the cover seal twisted with respect to the coupler seal during assembly, the seal packing can be formed in a simple shape, and the mold for molding the seal packing can be used. There is an effect that the cost of the mold can be reduced, the yield of the seal packing is improved, the molding accuracy is stabilized, and the occurrence of defective sealing can be prevented. Further, since the coupler is provided separately from the body or the cover, there is an effect that it is possible to easily cope with a case where the specifications are changed with the coupler alone, the body alone, or the cover alone.

According to a fourth aspect of the present invention, in the third aspect of the present invention, a ridge protruding toward the body is formed on the surface of the cover facing the body with a predetermined gap between the ridge and the inner surface of the body. A sealing portion formed by enclosing a sealing resin filled in the body for sealing the circuit component into a gap between the inner surface of the body and the ridge portion and curing the sealing resin. The contact surface between the body and the cover can be double-sealed by the seal formed between the inner surface of the body and the ridge and the cover seal of the seal packing. There is an effect that performance is improved. In addition, by forming a seal between the inner surface of the body and the ridge of the cover, the contact area between the body and the cover increases, and the thermal conductivity between the body and the cover improves. Variations in the surface temperatures of the body and the cover are reduced, and the internal temperature can be efficiently radiated to the outside.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, a second heat-generating component having a relatively large calorific value is disposed with a predetermined gap between the circuit component and the cover. A heat conductive portion formed by wrapping the sealing resin into a gap between the cover and the second heat-generating component and curing the resin; and heating the second heat-generating component by the heat conductive portion. As a result, the heat is transmitted to the cover side through the cover, and the heat is radiated to the outside from the cover. Therefore, compared with the case where heat is radiated only from the body side, heat can be radiated more efficiently, and there is an effect that it is possible to prevent the entire device from being enlarged to secure a heat radiation area.

According to a sixth aspect of the present invention, in the first aspect of the present invention, a seal groove is provided at an open end of the side surface of the body, in which a seal packing for sealing a gap between the body and the cover is provided. The cross-sectional shape is such that the groove width becomes wider from the bottom side to the opening side, and a slit part whose groove width is smaller than the outer dimension of the seal packing is provided at a key point of the seal groove, Since the seal packing is held by the portion, the seal packing does not fall out of the seal groove, and the workability of the assembling operation is improved. In addition, the cross-sectional shape of the seal groove is such that the groove width becomes wider from the bottom side to the opening side, and the width of the bottom surface is smaller than the width of the opening of the seal groove. The width of the entire side wall can be reduced while securing the thickness of the portion outside the groove and the width of the portion of the seal groove with which the seal packing contacts, which has the effect of reducing the size of the entire device. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an illumination lighting device according to an embodiment.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is an enlarged view of a main part when a state in which a seal packing is attached to the above-described body is viewed from above.

4A and 4B show a state in which a seal packing is attached to the body, and FIG. 4A is an enlarged perspective view of a main part which can be partially broken, and FIG.
Is a sectional view of a main part.

5 (a) to 5 (c) are cross-sectional views illustrating manufacturing steps of the above.

FIG. 6 is a sectional view of a conventional lighting device.

FIG. 7 is a cross-sectional view of another lighting device according to the first embodiment;

8A and 8B show another illumination lighting device of the above, wherein FIG. 8A is a cross-sectional view in which a part can be omitted, and FIG. 8B is a side view in which a part is viewed from the left side.

FIG. 9 is a cross-sectional view of a main part showing a state in which a seal packing is mounted on the above body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Body 3 Cover 5 Transistor 7 Circuit board 9 Notch 8, 17 Rib

Claims (6)

[Claims] 1. A body having a box shape open on one side, in which a circuit component of a lighting device for lighting a lamp is housed.
A cover for closing the opening of the body and a first heat absorbing rib formed integrally with the body at a portion of the circuit corresponding to the first heat generating component having a relatively large heat generation among the circuit components. An illumination lighting device characterized in that a second rib for heat absorption sandwiching the first heat-generating component between the first heat-generating component and the cover is formed integrally with the cover. 2. A guide which is inclined at a position of at least one of the first and second ribs facing the first heat-generating component in such a direction that a tip end portion thereof is away from the first heat-generating component. The illumination lighting device according to claim 1, wherein a surface is provided. 3. A coupler holding groove whose one end is open to the opening side of the body is formed on a side surface of the body, a seal groove is formed on an opening end of the side surface, and a coupler for external connection is arranged in the coupler holding groove. The cover seal portion disposed in the seal groove and sealing the gap between the body and the cover, and the coupler seal portion attached to the coupler surface and sealing between the coupler surface and the coupler holding groove have elasticity. The illumination lighting device according to claim 1, further comprising a seal packing formed of a synthetic resin continuously and integrally. 4. A projecting ridge protruding toward the body is formed on the surface of the cover facing the body with a predetermined gap between the ridge and the inner surface of the body. 4. A lighting device according to claim 3, further comprising a sealing portion formed by wrapping the sealing resin filled into the gap between the inner surface of the body and the ridge portion and curing the sealing resin. apparatus. 5. A second heat-generating component having a relatively large heat value among the circuit components is disposed with a predetermined gap between the cover and the cover, and the sealing resin is disposed between the cover and the second heat-generate component. 5. The illumination lighting device according to claim 4, further comprising a heat conducting portion formed by wrapping around and curing the gap between them. 6. A seal groove in which a seal packing for sealing a gap between the body and the cover is provided at an open end of a side surface of the body, and the cross-sectional shape of the seal groove increases from the bottom side toward the opening side. The illumination lighting device according to claim 1, wherein a slit portion having a cross-sectional shape so as to have a wide width and a groove width smaller than an outer dimension of the seal packing is provided at a key point of the seal groove.