JPH0448504A - Lighting device for discharge lamp - Google Patents

Abstract

PURPOSE:To use the case of the lighting device of a discharge lamp concurrently for an apparatus chassis, make it flat and thin, and miniaturize it by blocking one end side opening of the case storing a circuit board section fitted with an inverter lighting circuit with a lamp socket. CONSTITUTION:Coils 22, 23 are wound in parallel with a circuit board 12 to form a flat coil, the lower ferrite core 21 of an inverter transformer 19 is coupled with the insertion hole 30 of a circuit board 12, and the bottom face of the lower ferrite core 21 is brought near or into contact with the inner face of a lower case member 2 for the installation on the circuit board 12. A case 1 is constituted of the lower case member 2 and an upper case member 3 fitted to the lower case member 2, both end sections are blocked by a lamp socket 40 and a terminal base 41, and a circuit board section is connected to the lamp socket 40 and the terminal base 41. The lighting device of a discharge lamp itself thus constituted becomes an illumination apparatus, no unit chassis is required, and it can be made flat and thin.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a discharge lamp lighting device such as a lighting fixture mounted on a ceiling.

(Prior art) A lighting fixture equipped with a conventional discharge lamp lighting device has a circuit board equipped with an inverter lighting circuit attached to the fixture chassis.
A structure was adopted in which a lamp socket connected to this inverter lighting circuit was disposed on a reflector plate attached to the appliance chassis.

(Problems to be Solved by the Invention) In the above-mentioned conventional lighting equipment, circuit boards equipped with inverter lighting circuits are individually attached to the chassis, so there is a problem in making them thinner and smaller. It has also been difficult to make lighting fixtures using discharge lamp lighting devices thin and compact.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a discharge lamp lighting device that is easy to assemble and can be made thin and compact.

[Structure of the invention]

(Means for Solving the Problems) A discharge lamp lighting device according to the invention as set forth in claim 1 includes a cylindrical case having an opening formed at least at one end, and an inverter lighting circuit mounted on a board and housed in the case. A lamp socket is provided that closes an opening at one end of the case and is connected to the circuit board.

The discharge lamp lighting device of the invention according to claim 2 includes: a cylindrical case having openings formed at both ends; a circuit board portion in which an inverter lighting circuit is mounted on a board and housed in the case; and one end of the case. A lamp socket provided by closing a side opening and connected to the circuit board part, and a connecting terminal provided by blocking the other end side opening of the case and connected to the circuit board part, and a power supply line. It consists of a terminal block formed with a terminal block section on which connection terminals are arranged.

(Function) The discharge lamp lighting device of the invention as set forth in claim 1 is characterized in that the opening at one end of the case housing the circuit board section on which the inverter lighting circuit is attached to the board is closed by the lamp socket connected to the circuit board section. By doing so, the discharge lamp lighting device is assembled, and the case of the discharge lamp lighting device also serves as the instrument chassis.
It is possible to make it flat and thin and compact.

In the discharge lamp lighting device according to the second aspect of the invention, the power supply terminal may be further connected to the terminal block that closes the opening on the other end of the case, so that assembly is easy and the device can be made thin and compact.

(Embodiment) The configuration of an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

(2) is a case, and this case 1 has a flat rectangular cylindrical shape with openings at both ends, consisting of a lower case member 2 in the form of an elongated plate and an upper case member 3 with a substantially U-shaped cross section that is fitted into the lower case member 2. is formed. Around this lower case member 2, a wiring section 5 is formed on the back side by a circumferential side part 4 that is bent toward the back side. The lower case member 2 is formed longer than the upper case member 3 with both ends thereof extending in the longitudinal direction, and both ends of the lower case member 2 that protrude from the upper case member 3 are attached to a structure such as a ceiling. The mounting hole 6 is formed in the mounting portion 7, and the mounting portion on one end of the lower case member 2 is extended to form a lamp holding portion 8, and a lamp holder 9 is attached to the lamp holding portion 8. is provided.

Further, 1G is a circuit board section in which an inverter lighting circuit 11 shown in FIG. This inverter lighting circuit 1! are through-hole inserted parts on the surface of the circuit board 12, for example, a transistor 14 and a capacitor 15 with a heat sink 13 attached thereto.
, a resistor 16, etc., a capacitor 17, a resistor 18, etc. as surface-mounted components on the back surface of the circuit board 12, and an inverter transformer 19 inserted through the circuit board 12. This inverter transformer 19
As shown in FIGS. 4 and 5, ferrite cores 20.2+ are vertically opposed and abutted against each other, and primary coils 22 are wound around the ferrite cores 2G and 2+.
and a secondary coil 23. and,
In the ferrite cores 2G and 2+, side circumferential centers 26 are formed parallel to each other via connecting portions 25 that are perpendicular to both sides of the central circumferential center 24, and are located between the central circumferential center 24 and the side circumferential centers 26. Leakage circumferential centers 27 are formed parallel to each other in the connecting portion 25 . In addition, the side circumferential centers 26 are projected longer than the central circumferential center 24 so as to butt each other, and the leakage circumferential center 27 is shorter than the center circumferential center 24, and the leakage circumferential center 27 is shorter than the center circumferential center 24 so that the leakage The relationship with the gap G2 between the tips of the iron core 27 is Gl<62.

Further, the secondary coil 22 includes the ferrite core 2G,
The secondary coil 23 is fitted onto the center circumferential center 24 of the 2+ coil bobbin 28 and has a coil winding portion open on the outer circumferential surface, and the secondary coil 23 is fitted onto the leaky circumferential center 27 and has a coil winding portion open on the outer circumferential surface. The second coil 2 is wound on the coil bobbin 29 which is
A secondary coil 23 is disposed outside of the coil 2 .

As shown in FIG. 3, the lower ferrite core 21 of the inverter transformer 19 is fitted into the insertion hole 30 formed in the circuit board 12, and the bottom surface of the lower ferrite core 21 is connected to the inner surface of the lower case member 2. The upper surface of the upper ferrite core 20 is close to or in contact with the inner surface of the upper case member 3, and the secondary coil 2
Terminals 31 connected to the lead wires of the secondary coil 2 and the secondary coil 23 at the upper part of the coil bobbin 28 and 29 are inserted through through holes into the surface of the circuit board 12, and are connected to the lower surface of the circuit board 12. The lower surfaces of the coil bobbins 28 and 29 of the secondary coil 23 are brought into contact with or close to the circuit board 12 so that the winding direction is parallel to the circuit board 12.

Further, for example, the heat sink 13 attached to the transistor I4
is in surface contact with the inner surface of the upper case member 3.

Further, as shown in FIG. 7, the inverter lighting circuit 11 is connected to a DC power supply circuit 33 connected to an AC power supply 32, and a fluorescent lamp 34 is connected to the secondary coil 23 of the inverter transformer 19 of the inverter lighting circuit 11. is now connected. The inverter lighting circuit 11 includes, for example, a capacitor 35 and an inverter transformer 19 connected to the emitter of the switching transistor 14 by turning on and off the switching transistor 14.
An operating voltage is applied to the fluorescent lamp 34 from the secondary coil 23 due to the resonance operation of the resonant circuit formed by the primary coil 22 . Note that a transistor protection diode 36 is connected between the emitter and collector of the transistor 14.

This inverter transformer 19 has a capacitor 35
Due to the resonance operation of the resonant circuit formed by the primary film 22 of the inverter transformer 19 and the primary film 22 of the inverter transformer 19, an excitation current flows through the negative secondary coil 22, and as shown in FIG. The center circumference 2 of the ferrite core 20 of
4, through the side circumferential center 26 of the other ferrite core 21, and circulates to the central circumferential center 24, and the exciting magnetic flux forms a magnetic circuit shown by the solid line in FIG. Because it is a generating part, it has almost no relation to magnetic resistance, and the magnetic resistance in this magnetic circuit is only at the abutting part of the side circumferential center 26.26, and the magnetic resistance is extremely small, and nearly 100% of the magnetic energy is secondary. 23 is supplied to the coil.

Further, a magnetic circuit for generating leakage inductance by the secondary coil 23 is formed between the side circumferential core 26 and the leakage rotary core 27, as shown by the chain line in FIG. 6, and the magnetic flow direction of this magnetic circuit is the primary The flow of the excitation magnetic flux of the coil 22 is opposite to that of the magnetic flux in the gap between the leakage cores 27 and 27, and current-limiting leakage inductance is obtained, and the operating current emitted by the secondary coil 23 to the fluorescent lamp 34 is reduced. Can be restricted.

This magnetic circuit is shorter than the magnetic path of the magnetic circuit of the primary coil 22, and can secure a large ampere turn for generating leakage inductance, allowing efficient generation of leakage inductance, and reducing the number of turns of the secondary coil 22 and secondary coil 23. (This allows the height of both coils 22 and 23 to be lowered, making it thinner and lighter.

Further, in FIGS. 1 and 2, 40 is a lamp socket fixed to the lower case member 2 and fitted into the opening on one end of the case 1Φ to close the opening on the one end, and 41 is a lamp socket fixed to the lower case member 2. This is a terminal block that is fixed and fitted into the opening on the other end of the case 1 to close the opening on the other end, and the connection terminals built into the lamp socket 40 and the terminal block 41, respectively, are connected to the circuit board 12 of the circuit board section 1G. The lamp sockets 40. Circuit board I2 at terminal block 41
is held within case 1. A terminal block portion 43 is formed on the outer surface of the terminal block 41 and has a plurality of parallel connection holes 42 in which connection terminals for connecting a power line and a power line for feed wiring are arranged. Further, the lamp socket 40 is formed with a mounting portion 44 into which, for example, a single-end metal fluorescent lamp 34 having a light emitting portion bent in a substantially U-shape is mounted.

Incidentally, when attaching the other end side of the lower case member 2 of the case 1, a wire insertion hole 45 is opened in the part 7, and the wire 46 wired to the wiring part 5 is drawn through the wire insertion hole 45 and connected to the terminal block. 41. The terminal block 41 and the mounting section 7 are covered with a removable cover 47.

Next, the operation of this embodiment will be explained.

In this device, the configuration and installation of the inverter transformer 19, which is a factor in increasing the size of the device, and its installation on the circuit board 12 have been studied, and a long life and thin design have been achieved.

In other words, the winding direction of the coils 22 and 23 is the circuit board! 2 to form a flat coil, and for installation on the circuit board I2, the lower ferrite core 21 of the inverter transformer 19 is fitted into the insertion hole 30 of the circuit board 12,
The bottom surface of the lower ferrite core 21 is brought close to or in contact with the inner surface of the lower case member 2, and the coil bobbin 28.2
By arranging and wiring the upper ferrite core 9 in contact with or close to the circuit board I2, the upper surface of the upper ferrite core 20 is brought close to or in contact with the inner surface of the upper case member 3, and the case part can be easily made flat and thin. That's what I do. Further, the fluorescent lamp 34 attached to the lamp socket 40 provided in the opening on one end side of the case 1 of the lighting device is attached to the lower case member 2.
It is held by a lamp holder 9 provided in a lamp holding portion 8 of the lamp holder 9 .

Further, the case 1 is formed of a lower case member 2 and an upper case member 3 attached to the lower case member 2, both ends of which are closed with a lamp socket 4G and a terminal block 41.
This lamp socket 40, the circuit board part 10 on the terminal block 41
By connecting these, the configuration of the lighting device is simple and unitization becomes possible. Further, the case 1 is formed long with both ends extending, and the upper case member 3 of the lower case member 2
For installation where the more protruding end portions are attached to a structure such as a ceiling, the holes 6 are formed in the portion 7, making the installation easier.

Further, since the terminal block 41 is provided with a terminal block section 43 in which connection terminals for power wires are provided, wiring becomes easy.

The discharge lamp lighting device itself configured in this manner serves as a lighting fixture, and a separate chassis or the like is not required, and the device can be made flat and thin.

Note that, specifically, the thickness of the case 1 is reduced to about 20 mm.

Next, the configuration of another embodiment will be explained with reference to FIG.

In this embodiment, the discharge lamp lighting device has the same configuration as the previous embodiment, and the lamp socket 50 provided at the opening on one end side of the case 1 has lamp mounting portions 51 arranged in parallel on the left and right so that two lamps 34 can be mounted. It can also be formed.

Also, 9th r1! As shown in FIG. J and FIG. 10, the width of the case 1 may be shaped to match the width of the lamp socket 50 into which two lamps 34 can be mounted. A mounting section 53 having a hole 52 is formed on the lamp socket 50, and a mounting section 55 having a hole 54 is also formed on the terminal block 41 attached to the opening on the other end side of the case 1.

Furthermore, the configuration of another embodiment will be explained with reference to FIGS. 11 and 12.

In this embodiment, a circuit board section 1 is provided at one end side opening of the case 1.
A connector part 62 is formed on the upper surface of this terminal block 60 and has a connection hole 61 in which a load side terminal connected to the circuit board part 1O is arranged. A lamp socket 64 having a connecting terminal 63 protruding from the bottom surface to be connected to the connector portion 62 is attached to the terminal block 60. In addition, the terminal block 65 that covers the opening on the other end of the case 1 has a hole 66 to form a part 67, and a wire pull-out hole 68 is formed in the part 67. has a plurality of parallel connection holes 69 in which connection terminals for connecting power lines and feed wiring are arranged.

This terminal block 65 has a mounting portion 67 and a connection hole 69.
A cover 70 covering the terminal block 65 is detachably attached to the terminal block 65 by means of concave and convex engaging portions 71 and 72. A lamp holder 73 is provided on this cover 70.

The lamp 34 attached to the lamp socket 64 is disposed along the upper surface of the case 1, and the lamp 34 is held by a lamp holder 73 of the cover 70.

In addition, in the structure of this embodiment, between both ends of the case 1 [
It is also possible to attach lamp sockets that are opposed to the terminal blocks provided in the lamp socket and that accommodate the caps at both ends of the straight tube fluorescent lamp, respectively.

Further, the configuration of another embodiment will be explained with reference to FIGS. 13 and 14.

A lamp socket 75 for mounting the lamp 34 is attached to the opening at one end of the case 1 in a direction perpendicular to the longitudinal direction of the case 1. The lamp socket 75 is provided with lamp mounting parts 76 on both sides, and arms 78 each having a lamp holder 77 at the tip thereof. Hold 77.

In the structure of this embodiment, the case 1 is vertically attached to the ceiling of a building using a hanging wire or a fixture 78 such as a fixture.

Furthermore, as shown in FIG. 15, the lamp mounting portion 76 of the lamp socket 75 is not limited to the upward direction, but can also be formed downward. In this structure, the lamp holder 77 is located above the lamp 34, so that the lamp holder 77 does not cast a shadow.

〔Effect of the invention〕

According to the invention as set forth in claim 1, a circuit board section having an inverter lighting circuit mounted on the board is housed in a cylindrical case having openings formed at both ends, and the circuit board section is closed by closing one end side opening of the case. Since we have provided a lamp socket connected to
The discharge lamp lighting device is assembled by closing the opening at one end of the case that houses the circuit board section mounted on the circuit board with the lamp socket connected to the circuit board section. The case also serves as the instrument chassis, making it possible to make it flat, thin, and compact.

According to the invention as claimed in claim 2, since the terminal block is provided which closes the opening on the other end side of the case and forms a terminal block section connected to the circuit board section and provided with the connection terminal of the power line, the case can be closed. It is only necessary to connect the power terminal to the terminal block that closes the opening on the other end side, and it is easy to assemble and can be made thin and compact.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a discharge lamp lighting device according to an embodiment of the present invention;
Figure 2 is an exploded perspective view of a part of the above, Figure 3 is a vertical sectional view of the same, Figure 4 is a perspective view of the inverter transformer, Figure 5 is a perspective view of the ferrite core, and Figure 6 is the inverter transformer. 7 is a circuit diagram of the same as above, FIG. 8 is a perspective view of a discharge lamp lighting device showing another embodiment, FIG. 9 is a perspective view of a discharge lamp lighting device showing still another embodiment, and FIG. The figure is a perspective view of a part of the same as above, FIG. 11 is a perspective view of a discharge lamp lighting device showing another embodiment, FIG. 12 is an exploded perspective view of the same as above, and FIG. 13 is a discharge lamp lighting device showing another embodiment. FIG. 14 is a longitudinal sectional side view of the same, and FIG. 15 is a partial perspective view of a discharge lamp lighting device showing another embodiment. 1...Case, 10...Circuit board section, 12...Circuit board, 40...Lamp socket, 41...Terminal block. −2′,

Claims (2)

[Claims] (1) a cylindrical case having an opening formed at at least one end; a circuit board section having an inverter lighting circuit attached to the board and housed in the case; A discharge lamp lighting device comprising a lamp socket connected to a circuit board section. (2) a cylindrical case with openings formed at both ends; a circuit board portion in which an inverter lighting circuit is mounted on a board and housed within the case; and the circuit board provided with an opening at one end of the case closed. A terminal block part is formed, which includes a lamp socket connected to the part, and a connecting terminal provided by closing the other end side opening of the case and connected to the circuit board part, and in which a connecting terminal for a power line is arranged. A discharge lamp lighting device comprising a terminal block.