JPH11250730A - Bulb type fluorescent lamp and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bulb-type fluorescent lamp saving space for a connection structure of a lighting circuit with an emission tube. SOLUTION: This bulb type fluorescent lamp 10 is prepared with an emission tube 18, a cover 14 with a metal cap, a circuit board 24 provided with an electric connection terminal 27 on the peripheral surface, and a lighting circuit 16 sandwiching a lead wire 29 of the emission tube 18 between the electric connection terminal 27 and the cover 14 and contained within the cover 14. Consequently, the space on the circuit board 24 where the electric connection terminal 27 is set is reduced to minify the lighting circuit 16, thus the bulb-type fluorescent lamp 10 can be miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact fluorescent lamp.

[0002]

2. Description of the Related Art Conventionally, for example, a light bulb type fluorescent lamp which has a cover having a base mountable to a socket of an incandescent light bulb, a lighting circuit is housed inside the cover, and an arc tube is bent and housed in a glove. Lamps are known.

[0003] The compact fluorescent lamp is miniaturized as much as possible for compatibility with the incandescent lamp. However, the conventional compact fluorescent lamp has a slightly larger outer dimension than the incandescent lamp, so that the incandescent lamp cannot be used. It is not possible to completely replace it. Therefore, further miniaturization of the bulb-type fluorescent lamp is desired, and miniaturization of the arc tube, globe, and cover is being studied.

In miniaturizing a compact fluorescent lamp,
Lighting circuits also need to be miniaturized, and methods of selecting or mounting circuit components are being studied.

On the other hand, as a method of connecting a light emitting tube and a lighting circuit of a bulb-type fluorescent lamp, for example, Japanese Unexamined Patent Publication No.
As described in Japanese Unexamined Patent Publication (Prior Art), a method of implanting a wrapping pin on a circuit board and winding a lead wire derived from an arc tube around the pin is often used.

[0006]

In the connection between the arc tube and the lighting circuit according to the prior art method, there is no problem in reliability and workability, but a space for implanting pins on the circuit board is increased. Must be secured. In addition, a space must be secured around the pins in order to wind the lead wires around the pins, which has been a factor that hinders miniaturization of the circuit board.

The present invention has been made in view of the above problems, and has as its object to provide a compact fluorescent lamp in which the connection structure between the lighting circuit and the arc tube is space-saving.

[0008]

According to a first aspect of the present invention, there is provided a light bulb-shaped fluorescent lamp having an arc tube, a cover having a base, and a circuit board provided with electric connection terminals on a peripheral surface thereof. And a lighting circuit housed in the cover with the lead wire of the arc tube sandwiched between the lighting circuit and the lighting circuit.

The terms defined in claim 1 and the following claims are defined according to the following description.

[0010] The arc tube only needs to have a bent portion, so that it is allowed to be an arc tube having various shapes such as double U and triple U. In addition, the arc tube seals a pair of filament electrodes inside both ends of an elongated glass bulb, and directly or indirectly applies a phosphor layer to the inner surface,
It is preferable that a discharge medium such as a rare gas and mercury is sealed inside. As the phosphor, a three-wavelength emission rare earth phosphor, a calcium halophosphate phosphor, or the like can be used. The arc tube may use a rare gas discharge that does not enclose mercury or may have an electrode outside.

Although the lighting circuit is preferably of an inverter type, it is not limited to this, as long as it has a circuit board, due to the nature of the present invention. The lighting circuit is housed directly or indirectly attached to the cover.

The electric connection terminals may be provided only if the terminals are provided on the peripheral surface of the circuit board, and may be formed by attaching the terminals to the circuit board or may be formed by printing.

The peripheral surface of the circuit board on which the electric connection terminals are disposed may be a smooth surface continuous with the adjacent peripheral surface, but may be a concave portion locally recessed inward or a convex portion locally projected inward. May be. Further, the electrical connection terminal may be provided in a notch groove cut in a rectangular shape continuously on the circumferential surface. In any case, the shape of the peripheral surface of the circuit board on which the electrical connection terminals are provided may be any shape as long as the lead wires can be sandwiched between the electrical connection terminals and the cover. The cover for holding the lead wire may be a member attached to the cover such as a holder for supporting and fixing the arc tube or the lighting circuit.

As the base, a screw-in type called an E type is usually used, but the present invention is not limited to this. In addition,
It is not necessary that the cover is directly attached to the cover, and the cover may be indirectly attached to the case or a part of the cover may constitute a base.

The cover directly or indirectly supports the arc tube. As a means of indirect support,
It is preferable to mount a holder having a shape in which both ends of the arc tube can be inserted in a portion of the cover opposite to the direction in which the base is mounted.

A glove for covering the arc tube may be attached to the cover. This glove may be light-diffusing or transparent as long as it has light-transmitting properties, and may be patterned or colored. The material of the glove may be either glass or plastic. Although the shape of the glove is arbitrary, it is possible to adopt a so-called G-shape similar to a generally popular sphere, a so-called T-shape having a spherical tip and a cylindrical shape, and the like.

According to the bulb-type fluorescent lamp of the first aspect, the electric connection terminal of the lighting circuit is provided on the peripheral surface of the circuit board, and the lead wire of the arc tube is sandwiched between the electric connection terminal and the cover to make the electric connection. As a result, the space for arranging the electrical connection terminals is reduced, and the lighting circuit is reduced, so that the compact fluorescent lamp can be downsized.

According to a second aspect of the present invention, in the light bulb-shaped fluorescent lamp according to the first aspect, the cover is provided with a mounting piece formed in accordance with the outer peripheral shape of the lighting circuit, and the lead wire is connected to the mounting piece. The lighting circuit is mounted on the mounting piece while being sandwiched between the electrical connection terminals.

The mounting piece is preferably formed integrally with the cover, but may be formed indirectly on another member mounted on the cover, such as a holder for supporting the arc tube.

According to the bulb-type fluorescent lamp of the second aspect, the mounting piece is formed inside the cover so as to match the outer peripheral shape of the lighting circuit, and the lighting circuit is mounted on the mounting piece and the lead wire of the arc tube is connected. The lighting circuit is sandwiched between the mounting piece and the electrical connection terminal, so that the lighting circuit can be easily mounted on the cover.

According to a third aspect of the present invention, in the bulb-type fluorescent lamp according to the second aspect, the circuit board of the lighting circuit has a substantially circular outer peripheral shape, and the circuit board and the mounting piece are provided in the circumferential direction of the circuit board. Characterized by being provided with respective engagement portions for restricting the rotation of.

The engaging portion can be formed by forming means for engaging the concave and convex relative to the peripheral surface of the circuit board and the mounting piece, respectively. The peripheral surface on which the electrical connection terminals are provided may be an engagement recess, and the means for holding the lead wire and the means for restricting the rotation of the circuit board may be used.

According to the third aspect of the present invention, the circuit board of the lighting circuit has a substantially circular outer peripheral shape, and is engaged with the circuit board and the mounting piece to restrict rotation of the circuit board in the circumferential direction. Since the portion is provided, it is possible to reliably prevent the electrical connection between the electrical connection terminal and the lead wire of the arc tube from being disconnected due to the rotation of the circuit board in the circumferential direction.

The lighting apparatus of claim 4 is the lighting apparatus of claims 1 to 3
A light bulb-type fluorescent lamp according to any one of the above aspects is provided.

According to the lighting apparatus of the fourth aspect, it is possible to provide a lighting apparatus having the compact fluorescent lamp according to any one of the first to third aspects.

[0026]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a compact fluorescent lamp and a lighting device according to the present invention.

FIG. 1 is a partial cross-sectional view showing an embodiment of a bulb-type fluorescent lamp of the present invention, FIG. 2 is a side view of a globe of the above-mentioned bulb-type fluorescent lamp, and FIG. FIG. 2 is an exploded perspective view of a part of the shaped fluorescent lamp.

1 to 3, reference numeral 10 denotes a bulb-shaped fluorescent lamp. The bulb-shaped fluorescent lamp 10 includes a cover 14 having a base 12, a lighting circuit 16 housed in the cover 14, and a light-transmitting light. Gloves 17 having properties,
An arc tube 18 housed in the globe 17 is provided. The envelope composed of the globe 17 and the cover 14 is formed to have an outer shape that approximates the standard size of an incandescent lamp with a rated power of 60 W. That is, the lamp length H including the base 12 is about 120 mm to 125 mm, the diameter, that is, the outer shape D1 of the globe 17 is about 60 mm, and the cover 1
4 has a maximum diameter D2 of about 40 mm. Hereinafter, description will be made with the base 12 side being the upper side and the glove 17 side being the lower side.

The cover 14 has a cover body 21 made of a heat-resistant synthetic resin such as polybutylene terephthalate (PBT). The cover body 21 has a substantially cylindrical shape that expands downward, and is covered with a cap 12 such as an Edison type E26 type on its upper end, and is fixed with an adhesive or a caulking.

The globe 17 is made of a transparent or light-diffusing milky white or the like, and is formed of glass or synthetic resin into a smooth curved surface having substantially the same shape as the glass bulb of the incandescent lamp. The edge has a fitting edge 17 that fits inside the opening at the lower end of the cover 14.
a is formed. The globe 17 may be combined with another member such as a diffusion film to improve the uniformity of luminance, or may be omitted.

The lighting circuit 16 housed in the cover 14 includes a circuit board (PC board) 24 arranged horizontally, that is, perpendicular to the longitudinal direction of the arc tube 18. A plurality of electric components 25 and 26 are mounted on the upper surface on the side 12 and the lower surface on the side of the arc tube 18 to constitute an inverter circuit (high-frequency lighting circuit) for high-frequency lighting. On the upper surface of the circuit board 24, electric components 25 such as an electrolytic capacitor and a film capacitor which are relatively weak to heat are arranged.
On the lower surface, a chip-shaped electric component (chip component) 26 that is relatively resistant to heat and has a small height dimension is arranged. The chip-shaped electric component 26 is a REC (rectifying element, diode bridge), a transistor, a resistor, or the like.
It is formed to about 3 mm. The circuit board 24
Has a substantially disk shape and a diameter dimension smaller than a substantially circle of 40 mm. A wire (not shown) derived from the circuit board 24 is connected to the base 12 of the cover 14.

On the circuit board 24 of the lighting circuit 16, electric connection terminals 27 are provided at four locations at regular intervals on the peripheral surface. The electric connection terminal 27 is formed by processing a metal plate made of phosphor bronze or the like into a substantially U shape. The electrical connection terminal 27 has one end formed in a flat plate shape and the other end formed in a wire shape. One end is close to the circumferential surface of the circuit board 24, and the other end is connected to the circuit board 24. It is inserted through the formed through-hole and soldered to the printed pattern.

The circuit board 24 of the lighting circuit 16 includes
Engaging recesses 28a, which are cut out in a rectangular shape continuously to the circumferential surface of the circuit board 24, are formed.

The arc tube 18 has three tubes 31 of substantially the same shape.
Are arranged at predetermined positions and are sequentially connected by the communication pipe 32 to
The discharge path is formed, and at the end of the discharge path, an electrode provided with a filament coil or the like is provided. The electrode is composed of four lead wires 29 led out from the arc tube 18 to the outside. It is connected to the. In addition, each tube 31
Has a phosphor film formed on the inner surface and a rare gas such as argon and mercury sealed inside. And
Each tube 31 is a glass cylindrical valve having an outer diameter of 10 mm and an inner diameter of 8 mm, that is, a wall thickness of 1 mm.
It is formed in a substantially U-shape provided with. That is, each tube 31 includes a bent portion 31a that smoothly reverses, and a pair of parallel straight tube portions 31b that are continuous with the bent portion 31a.

The arc tube 18 is mounted on a partition plate 33 as a holder which is a fluorescent lamp fixing member and a lighting circuit fixing member, and the partition plate 33 is fixed to the cover 14. That is, the partition plate 33 includes a disk-shaped substrate portion 34, and the end of each tube 31 is inserted into a mounting hole 34 a formed in the substrate portion 34, and is bonded with an adhesive or the like. The arc tube 18 is fixed to the partition plate 33. Further, a fitting step portion 35 is formed from the outer peripheral portion of the substrate portion 34 toward the upper side and further outward. The fitting step 35 is fitted inside the cover 14, and the fitting edge 17 a of the glove 17 is fitted between the fitting step 35 and the cover 14. By filling an adhesive 37 between the step portion 35 and the cover 14, these members are fixed to each other. A mounting piece 38 having a cylindrical shape or the like is protruded above the fitting step 35, and the circuit board 24 of the lighting circuit 16 is attached to the mounting piece 38 by fitting or bonding. Have been. An engagement projection 28b that engages with the engagement recess 28a of the circuit board 24 is formed on the attachment piece 38 so as to protrude inward.

The circuit board 24 of the lighting circuit 16 is mounted on the mounting piece 38 such that the engaging concave portion 28a and the engaging convex portion 28b are engaged with each other, and the lead wire 29 is electrically connected. It is sandwiched between the terminal 27 and the mounting piece 38. Note that in FIG.
The space between the lead wire 29 and the electric connection terminal 27 is reduced by minimizing the space for reliable electric connection. It is desirable to increase the pressure.

One end of each tube 31 of the arc tube 18 is sealed with a line seal using a mount or a pinch seal without using a mount.
A thin tube 41, also called an exhaust pipe, is welded to the other end to exhaust gas or to include amalgam as needed. The electrodes 28 formed at the ends of the respective tubes 31 located at both ends of the discharge path of the arc tube 18 are arranged such that a filament coil is supported by a pair of wells (introduction lines). And each wells is a tube 3
Through a dumet wire sealed to the glass at one end,
Connected to the lead wire 29 led out of the tube 31,
This lead wire 29 is connected to the electrical connection terminal 24 of the circuit board 24.
Is electrically connected to Note that one of the wells is provided with an auxiliary amalgam as needed.

Further, with the bulb-type fluorescent lamp 10 assembled as described above, the arc tube 18 is housed at a predetermined position in the globe 17. That is, in this state, the top P of each tube 31 is connected to the bulb-type fluorescent lamp 10.
Are located at equal intervals on one circumference centered on the central axis whose longitudinal direction is the vertical direction of the lamp, and each straight pipe portion 31b of each pipe body 31 is also a predetermined centered on the central axis of the lamp. They are located at substantially equal intervals on the circumference. Further, the straight pipe sections 31b are arranged so that the straight pipe sections 3 which are adjacent to each other in the circumferential direction.
1b is the outer diameter Lal0 of the tube body 31.
It is formed to be smaller than mm.

The bulb-shaped fluorescent lamp 10 thus configured has an input power rating of 14 W, is applied to the arc tube 18 at a high frequency of 12.5 W, the lamp current is 280 mA, and the lamp voltage is 65 V. The total luminous flux is 810 lm by using a three-wavelength light emitting phosphor.

According to this embodiment, by mounting the electric components 25 and 26 on both sides of the circuit board 24, the circuit board 24 can be downsized, and the cover 14 located near the base 12 can be downsized. it can.

The outer diameter of the circuit board 24 is substantially equal to the inner diameter of the cover 14 and is formed so as to cover the inside of the cover 14. Can be arranged, and the diameter in the vicinity of the base 12 can be reduced.

In this state, the planar positions of the circuit board 24 and the arc tube 18 are arranged so as to overlap with each other. By disposing the light emitting tube 18 at a position shifted from the end of the light emitting tube 18, in particular, the projecting thin tube 41, it is possible to prevent the light emitting tube 18 from interfering with the electric component 26, suppress the thermal effect, and provide a chip-shaped The lamp length can be further reduced by 2 to 3 mm, which is the thickness dimension of the component 26.

Further, the electric components 26 arranged on the surface of the circuit board 24 facing the arc tube 18 are arranged on the side of the arc tube 18 away from the electrodes, so that heat generated from the electrodes causes heat to the electric components 26 to be generated. Influence can be suppressed and reliability can be improved.

The arc tube 18 has a substantially U-shaped tube 31.
Are arranged in parallel, so that the lamp length can be reduced.

In this manner, a portion near the base 12, for example, a portion 30 mm from the vicinity of the base 12, is reduced in diameter so as to approach a so-called general PS-type bulb size, and the lamp length is shortened. Shape can be realized. Thus, the light bulb shaped fluorescent lamp 10 can be widely mounted on lighting equipment for incandescent light bulbs, so that versatility can be improved, uncomfortable feeling when mounted, and appearance can be improved.

In the above-described embodiment, the arc tube 18 is formed by connecting three U-shaped tubes 31. However, the shape of the arc tube 18 is not limited to this. Two, three, or four H-shaped tubes are juxtaposed, that is, a four-, six-, or eight-axis discharge path is formed along the longitudinal direction to reduce the lamp length. You can also.

The lighting circuit 16 is composed of one circuit board 2
Although 4 is arranged horizontally, a plurality of circuit boards may be provided.

Then, the bulb-type fluorescent lamp 1 having the above-described configuration is used.
The lighting fixture is constructed by attaching 0 to a fixture main body having a socket for an incandescent lamp or the like. In this configuration, a lighting fixture having the effects of the above-described bulb-type fluorescent lamp 10 can be configured.

[0049]

According to the bulb-type fluorescent lamp of claim 1,
The electric connection terminals of the lighting circuit are provided on the peripheral surface of the circuit board, and the lead wire of the arc tube is sandwiched between the electric connection terminals and the cover so that the electric connection is made. As the lighting circuit becomes smaller and the lighting circuit becomes smaller, the compact fluorescent lamp can be downsized.

According to the bulb-type fluorescent lamp of the second aspect, the cover is provided with a mounting piece formed in accordance with the outer peripheral shape of the lighting circuit, the lighting circuit is mounted on the mounting piece, and the lead wire of the arc tube is connected to the mounting piece. Since the light emitting circuit is sandwiched between the mounting piece and the electrical connection terminal, the lighting circuit can be easily mounted on the cover.

According to the third aspect of the present invention, the circuit board of the lighting circuit has a substantially circular outer peripheral shape, and is engaged with the circuit board and the mounting piece to restrict the circuit board from rotating in the circumferential direction. Since the portion is provided, it is possible to reliably prevent the electrical connection between the electrical connection terminal and the lead wire of the arc tube from being disconnected due to the rotation of the circuit board in the circumferential direction.

According to the lighting device of the fourth aspect, it is possible to provide a lighting device having the compact fluorescent lamp according to any one of the first to third aspects.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing one embodiment of a bulb-type fluorescent lamp of the present invention.

FIG. 2 is a side view of the bulb-type fluorescent lamp as seen through the globe.

FIG. 3 is an exploded perspective view of a part of the bulb-type fluorescent lamp;

[Explanation of symbols]

10: bulb-type fluorescent lamp, 12: base, 14: cover,
16 lighting circuit, 18 arc tube, 24 circuit board, 27
... Electrical connection terminals, 28 ... engaging portions, 29 ... lead wires, 38
… Mounting piece.

Claims (4)

[Claims] 1. A cover having an arc tube; a cover having a base; and a circuit board having an electric connection terminal provided on a peripheral surface thereof, wherein a lead wire of the arc tube is sandwiched between the electric connection terminal and the cover. And a lighting circuit housed therein. 2. A mounting piece is provided on the inner side of the cover so as to match the outer shape of the lighting circuit, and the lead wire is lit while being held between the mounting piece and the electrical connection terminal. 2. The compact fluorescent lamp according to claim 1, wherein the circuit is mounted on the mounting piece. 3. The circuit board of the lighting circuit has a substantially circular outer peripheral shape, and the circuit board and the mounting piece are provided with engaging portions for restricting rotation of the circuit board in the circumferential direction. The bulb-type fluorescent lamp according to claim 2, wherein: 4. A lighting fixture comprising the light bulb-shaped fluorescent lamp according to claim 1.