JP2001135132A - Lamp socket mounting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp socket mounting structure for preventing the application of machine screw locking force to a printed board. SOLUTION: In the lamp socket mounting structure, a lamp socket 1 is electrically connected to a printed board 3, a boss 13 protruded from a mounting board 10 located at the back of the printed circuit board 3 is passed through the printed circuit board 3 and the lamp socket 1 is locked to the boss 13 with machine screws. A metal pin 14 erected on the printed circuit board 3 is inserted in the lamp socket 1 for electric connection.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a lamp socket mounting structure.

[0002]

2. Description of the Related Art Conventionally, when a lamp socket is arranged on a printed circuit board, it is assumed that the lamp socket is directly fixed to the printed circuit board with screws.

[0003]

However, the printed circuit board is bent or cracked by the fixing force, and there is a concern that the copper foil is peeled or cut. Accordingly, the present invention provides a lamp socket mounting structure in which a screwing force is not applied to a printed circuit board.

[0004]

Means for solving the problems are as described in the claims.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described. However, this is merely an exemplary embodiment adopted based on the present invention, and the present invention will be described based on matters unique to the embodiment. Therefore, the technical scope of the present invention should be determined based on the matters stated in the claims and matters substantially equivalent to the matters.

In the illustrated embodiment, the lamp socket 1 and an opening facing the lamp socket 1 are formed in a part of a metal case 4 in which a printed circuit board 3 on which a lighting circuit component 2 constituting a high-frequency lighting circuit is arranged is placed. A hole 5 is formed, and a base of a reflective cap 6 made of synthetic resin is inserted through the opening 5 into the case 4 and disposed around the lamp socket 1. The lamp socket 1 includes a lamp such as a discharge lamp. Reference numeral 7 denotes a mounted downlight. Further, the lamp 7 and the lamp socket 1 and the lighting circuit component 2 are thermally isolated by the base of the reflector 6. The opening 5 is opened over the lower surface and the side surface of the case 4, and a heat radiating hole 8 is formed on the base side surface of the reflector 6 facing the side opening of the opening hole 5. Further, an eave portion 9 is provided on the case 4 at a position above the heat radiation hole 8. According to this configuration, since the lamp socket 1 and the reflector 6 are arranged on the printed circuit board 3 on which the lighting circuit components 2 are arranged, an integrated rationalization structure is achieved. The troublesome work such as the work of connecting a so-called cord from the printed circuit board 3 is eliminated. Further, the lamp 7 is substantially thermally isolated by the base of the reflector 6, and the temperature rise of the lighting circuit component 2 can be reduced. Further, since the heat radiating hole 8 is formed on the base side surface of the reflection shade 6 facing the side opening of the opening hole 5,
The heat of the lamp 7 can be radiated through the heat radiating hole 8 and the side opening of the opening 5, and the temperature rise of the socket 1 and the lighting circuit component 2 can be reduced. Further, since the eaves portion 9 is provided on the case 4 above the heat radiating hole 8, it is difficult for dust to enter the lamp 7 or the socket 1 through the heat radiating hole 8. The case 4 includes an upper case and a lower case, which are fixed to each other with screws.

Further, a printed circuit board 3 on which the lighting circuit components 2 are mounted and a case 4 containing a mounting base 10 made of synthetic resin to which the printed circuit board 3 is mounted are fixed to the reflective shade 6 and a base end face of the reflective shade 6. It is also a printed board mounting structure in which the printed board 3 and the mounting base 10 are sandwiched between the case 4 and the case 4. To fix the case 4 to the reflector 6, a boss 11 projecting from the base end surface of the reflector 6 is screwed from the upper surface of the case 4. Further, the lower peripheral edge of the mounting base 10 is locked by a locking claw 12 formed on the inner surface of the case 4, and the mounting base 10 is temporarily fixed to the case 4. According to this configuration, the base end surface of the reflection shade 6 and the case 4
Between the printed circuit board 3 and the mounting base 10
The printed circuit board 3 and the mounting table 10 can be easily fixed. In addition, the printed board 3 and the mounting base 10 may be fixed to the case 4 by screws or other appropriate means at a location apart from the base of the reflector 6. Conventionally, since the reflection shade 6 is arranged apart from the printed circuit board 3, many printed circuit boards 3 are often screwed directly to the case 4, and the assembling workability is poor.

Further, the lamp socket 1 is connected to the printed circuit board 3.
And a boss 13 protruding from the mounting base 10 located on the back surface of the printed circuit board 3 penetrates the printed circuit board 3, and the lamp socket 1 is screwed to the boss 13 to provide a lamp socket mounting structure. . Metal pins 14 are erected from the printed circuit board 3, and the metal pins 14 are inserted into the lamp socket 1 and are electrically connected. According to this configuration, since the lamp socket 1 is screwed to the boss 13 of the mount 10, no screw fixing force is applied to the printed board 3.
Of the copper foil can be prevented from being peeled or cut. Further, since there is no need to integrally form a component corresponding to the boss 13 from the socket 1, the socket 1 does not need to be deformed, and it is easy to handle as a component. In the conventional example, it is assumed that the lamp socket 1 is directly fixed to the printed circuit board 3, and the printed circuit board 3 is bent or cracked by the fixing force, and the copper foil is peeled or cut off. .

Further, the mounting base 10 to which the printed circuit board 3 on which the lighting circuit components 2 are mounted is mounted in the case 4, and a locking claw 12 formed on the inner surface of the case 4.
Thus, the lighting device structure is such that the lower edge of the peripheral portion of the mounting base 10 is locked. According to this configuration, when the mounting base 10 is pushed into the inner surface of the case 4, the peripheral portion of the mounting base 10 elastically deforms the locking claws 12 outward. Is restored and the mounting claw 12 is
0, the lower edge of the peripheral portion is locked, so that the mounting base 10 can be temporarily fixed easily. Conventionally, it is assumed that the mounting base 10 is screwed to the case, and the mounting base 1
The work of attaching the equivalent to 0 to the case was troublesome.

In a configuration in which the base end surface of the electrically insulating reflector 6 is brought into contact with the printed circuit board 3 on which the lighting circuit component 2 is mounted in close proximity to the lighting circuit component 2, the reflector 6 is indicated by a bold line in FIG. Although the metal reflective film 15 shown is deposited by vapor deposition to efficiently reflect the light from the lamp 7 downward, at least the base outer surface and the base end surface of the reflector 6 have no metal reflective film 15 attached thereto. It is also a light. Preferably, the metal reflection film 15 is attached only to the inner surface of the reflection shade 6. According to this configuration, since the metal reflection film 15 is not attached to the base outer surface and the base end surface of the reflector 6,
Discharge of the high voltage induced from the lighting circuit component 2 and the wiring pattern of the printed circuit board 3 to the metal reflection film 15 does not occur, and the malfunction of the weak current control unit (control IC or the like) in the lighting circuit component 2 can be prevented. . Conventionally,
Since there was no configuration in which the base end surface of the electrically insulating reflective shade 6 was disposed close to the lighting circuit component 2, no consideration was given to devising the attachment portion of the metal reflective film 15.

Further, a metal eyelet 16 is caulked and fixed in the hole of the printed circuit board 3, and a metal pin 14 having a flange 17 is passed through the eyelet 16, and the metal pin 14 is formed on the side without the flange 17. The eyelet 16 is soldered 18 to the printed circuit board 3, and the metal pin 14 is inserted into the connection hole 19 of the socket 1, which is an electrical component, on the side where the flange 17 is provided, and is connected to the electrical component. A connection terminal 20 such as a quick connection terminal is provided inside the connection hole 19. According to this configuration, the flange 17 of the metal pin 14 contacts the eyelet 16 made of metal, and the eyelet 1 having a fixed inner diameter is used.
Since the directionality of the metal pin 14 is easily determined by being fitted and inserted into the connector 6, the operation of inserting and connecting the metal pin 14 into the connection hole 19 of the socket 1 can be easily performed, and
The fixing strength of the metal pin 14 can be improved. In addition, Tsuba 17
Therefore, the metal pins 14 are regulated so as not to be pushed more than necessary in the direction of the printed circuit board 3, so that it is natural that solder cracking on the surface of the printed circuit board 3 and peeling of the copper foil can be prevented. In the past, it was known to use metal pins, but it was not known to use them together with eyelets, and it was difficult to determine the direction of the metal pins, so insert the metal pins into the connection holes of electrical components such as sockets. The connection work was difficult, and the fixing strength of the metal pins was poor.

An opening 21 is formed in a part of the case 4 in which the printed circuit board 3 on which the lighting circuit parts 2 are mounted is formed.
The lighting device also includes a power supply terminal block 22 that supplies power to the lighting circuit component 2 in the opening 21. Further, a part of the case 4 is cut and raised, and the power supply terminal block 22 is fixed to a mounting piece 24 which passes through a slit 23 of the printed circuit board 3. Also,
The case 4 including the mounting piece 24 is made of metal, and the electrically insulating mounting base 1 interposed between the printed circuit board 3 and the case 4.
At 0, a flat cylindrical portion 25 is formed so as to protrude between the inner periphery of the slit 23 and the outer periphery of the mounting piece 24. The case 4 is made of metal, the power supply terminal block 22 is arranged near the lower part of the opening 21, and the mounting base 10 made of synthetic resin is interposed between the printed board 3 and the case 4. In the case where the power supply terminal block 22 does not reach, the case 4
A closing piece 26 is formed so as to project from the opening 21, and the opening 21 is inserted into a groove 27 formed on both sides of the closing piece 26.
Is inserted. According to this configuration, since the power supply terminal block 22 is provided in the opening 21, the power supply terminal block 22 does not substantially protrude. Therefore, the lighting device has a smart shape and is easy to handle. Case 4
The power supply terminal block 22 is fixed to the mounting piece 24 having a part of the power terminal block cut and raised, and another mounting piece is not required for fixing the power supply terminal block 22, which is reasonable. Further, the flat tubular portion 25 improves the electrical insulation between the metal mounting piece 24 and the printed circuit board 3. Further, since the cut edge 41 of the opening 21 is inserted into the groove 27 formed on both sides of the closing piece 26, the cut edge 41 does not appear on the surface, so there is no risk of injury at the cut edge 41. In the opening 21, a bent piece 42 integrally bent inward from the case 4 is formed at a position facing the power terminal block 22, and the bent piece 42 is connected to the power terminal block 2.
2 located on both sides. A power supply line (not shown) is connected to the connection hole 43 of the power supply terminal block 22. Conventionally, there has been a lighting device provided with a power terminal block for supplying power to the lighting circuit component outside a case containing a printed circuit board on which the lighting circuit component is mounted.However, the lighting device has an irregular shape, and handling is inconvenient. there were.

To explain another structure, a mounting spring 31 is fixed to the lower end of the reflector 6 and an opening edge 33 of the ceiling 32.
The downlight is buried and mounted by the elastic force of the mounting spring 31. Further, the portion 34 at the base of the reflection shade 6 is a portion recessed in the direction of the socket 1 and is not necessarily open. A locking claw 35 is formed on the periphery of the mounting base 10, and the printed circuit board 3 is temporarily fixed to the mounting base 10.

[Brief description of the drawings]

FIG. 1 is an overall perspective view.

FIG. 2 is an overall sectional view

FIG. 3 is a partially enlarged sectional view of FIG. 2;

FIG. 4 is an overall sectional view in which a cutting direction is orthogonal to FIG. 2;

FIG. 5 is a partially enlarged sectional view of FIG. 4;

FIG. 6 is a partially broken sectional view of a socket portion.

FIG. 7 is a partial sectional view of a metal pin and a printed circuit board;

FIG. 8 is a sectional view of a reflection shade;

FIG. 9 is a side view of the power supply terminal block side.

FIG. 10 is a bottom view of the power supply terminal block side.

FIG. 11 is a top view of the power supply terminal block side.

FIG. 12 is a partially exploded perspective view of the vicinity of a power terminal block.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lamp socket 3 Printed circuit board 10 Mounting base 13 Boss

Continued on the front page (72) Inventor Tadashi Adachi 1-55 Yoshida Shimojima, Higashiosaka-shi, Osaka Asahi National Lighting Co., Ltd. F-term (reference) 3K013 BA04 CA05 CA07 DA04 DA09 EA01 3K014 DA02 5E024 BD00

Claims (1)

[Claims] 1. A lamp socket in which a lamp socket is electrically connected to a printed circuit board, and a boss protruding from a mounting base located on the back surface of the printed circuit board is penetrated through the printed circuit board, and the lamp socket is screwed to the boss. Mounting structure.