JP4596170B2 - Light bulb-type fluorescent lamp and lighting fixture - Google Patents

Description

  The present invention relates to a bulb-type fluorescent lamp and a lighting fixture having a globe that covers the fluorescent lamp.

  A bulb-type fluorescent lamp that has a cover body that has a base that can be mounted on a socket for a general lighting bulb, houses a lighting device inside the cover body, and stores it in a globe by bending the arc tube, etc. Yes.

  In recent years, fluorescent lamps, which are light-emitting tubes, have become smaller and more efficient due to electronic circuits of lighting devices and improvements in processing technology. The incandescent bulb has a size equivalent to 60W, but has high light output, high efficiency, and long life. A bulb-type fluorescent lamp having features is known (see, for example, Patent Document 1).

  Further, a bulb-type fluorescent lamp having a so-called PS (pear shape) glove in which the tip side, which is a characteristic bulb shape of an incandescent bulb, has a substantially spherical shape and the diameter of the vicinity of the base is reduced is known (for example, Patent Document 2).

  The bulb-type fluorescent lamp of Patent Document 2 is provided with a PS-shaped globe having approximately the same size and shape as the incandescent bulb, and has an incandescent bulb silhouette. Since it can be almost attached to the mounted lighting fixture, it greatly contributes to the popularization of the bulb-type fluorescent lamp.

  Further, a bulb-type fluorescent lamp in which a globe and a cover body are integrally formed of translucent plastic is known (for example, see Patent Document 3).

According to Patent Document 3, since the envelope is formed by combining the divided bodies in which the globe and the cover body are integrally formed, the assembly can be simplified.
JP 2000-21351 A JP 2005-108699 A JP 2003-217305 A

  The bulb-type fluorescent lamp of Patent Document 2 has a spiral arc tube that forms a contour along the inner surface of a PS-shaped globe in order to increase the discharge path length. The width dimension is formed so as to be smaller than the width dimension of the intermediate portion where the spiral diameter is maximum. The PS-shaped globe that covers the arc tube is formed by heating and contracting one end of the cylindrical bulb in a state where the arc tube is accommodated in the cylindrical bulb. That is, a state where the other end side is closed in a substantially spherical shape in advance and a cylindrical bulb having one end side opened with the same diameter as the intermediate portion is covered from the other end side of the arc tube, and the arc tube is accommodated in the cylindrical bulb A PS-shaped glove is formed by heating and shrinking one end of the cylindrical bulb.

  However, if one end side is heated and shrunk while the arc tube is housed inside the cylindrical bulb, the electrode member sealing portion, the arc tube support member, etc. provided on the one end side of the arc tube are heated and heated. May deteriorate.

  In addition, since the opening of the glove formed by shrinking one end of the cylindrical valve is a part that is attached to the cover body or the base side, it has high precision so that it has a predetermined size to facilitate attachment work. Need to be processed. However, it is difficult to accurately process the opening in a state where the arc tube is accommodated inside the cylindrical bulb.

  On the other hand, the bulb-type fluorescent lamp of Patent Document 3 is provided with predetermined joining means so that the divided envelopes are not separated. However, considering that the peripheral surface of the envelope is handled and handled by the user when the bulb-type fluorescent lamp is mounted and removed, the bonding strength of the envelope alone is not sufficient. On the other hand, when the base is attached to the envelope, the joint of the glove is maintained. However, since the base is made of metal, the base has little elastic force, and the outer periphery is made using the elastic force. It is difficult to firmly engage the vessel and the base. In addition, since the base is fixed to the cover body by recessing a part of the base with a small diameter punch or the like and biting into the cover body, the base is fixed by being fixed to the envelope. Separation of the vessel is also suppressed. However, just by fixing the base to the envelope with a punch, the base cannot be bonded firmly enough to prevent separation of the divided bodies.

  The present invention has been made in view of the above-described problems, and is formed so that the divided globe is securely joined and the connection strength between the cover body made of resin and the globe is increased to be substantially the same as the external dimensions of a general incandescent bulb. It is an object of the present invention to provide a small-sized light bulb-type fluorescent lamp and a lighting fixture.

  The light-emitting fluorescent lamp according to claim 1 is a light-emitting tube formed so that a width dimension on one end side provided with a sealing portion becomes smaller than a maximum width dimension from the other end side to the intermediate part, and the light-emitting tube A fluorescent lamp having a phosphor layer formed on the inner surface, a discharge medium sealed in the arc tube, and electrode means provided so as to be able to generate a single discharge path bent in the arc tube; The divided part divided into a plurality of parts on the plane is combined, the opening on one end side is reduced in diameter, the middle part bulges from the one end side, and a substantially spherical part is formed on the other end side. A glove in which the fluorescent lamp is housed in an internal space; a cap is provided at least on the outer surface side of one end side, and the one end side of the glove in a state where the divided bodies are joined to the inner peripheral surface side of the other end side. The engaging portion is formed in a circumferential shape, and the fluorescent run And the cover member and the housing at least a portion of the fluorescent lamp lighting apparatus for lighting a; characterized in that it comprises a.

  The arc tube of the fluorescent lamp has a sealing part formed on one end side, and has an external shape such that the width dimension on one end side becomes smaller than the maximum width dimension from the other end side to the intermediate part. The specific structure is not limited. As a structure of such an arc tube, for example, a plurality of tube parts in which a substantially central part of a straight tubular glass bulb is heated to be bent in a U-shape and a middle part of the U-tube bulb is further formed into a curved shape or an arc shape. Examples include a combined structure and a spirally formed structure. The width dimension of the arc tube means a width dimension in a direction substantially orthogonal to an axis connecting the base and the top of the globe in a state where the arc tube is accommodated in the globe and the base is covered.

  The electrode means is generally one in which electrodes are sealed at both end positions of a discharge path formed in the arc tube, but it may be a so-called electrodeless type having no pair of electrodes. Examples of the electrode include a hot cathode made of a filament, a ceramic electrode carrying an electron emitting material, and a cold cathode made of nickel or molybdenum.

  The globe that covers the fluorescent lamp preferably has substantially the same shape as the silhouette of a general incandescent bulb, but if the opening at one end is reduced in diameter and the middle portion bulges from the one end, Good.

  The cover body has an engaging portion configured to engage with one end side of the globe. The engaging portion is formed in a circumferential shape on the inner wall surface on the other end side of the cover body. The term “circumferential shape” as used herein means that the engaging portions are provided intermittently at a predetermined interval in addition to those provided continuously on the inner wall surface. Further, the entire cover body may be disposed on the inner surface side of the globe or the base so that the cover body cannot be visually recognized from the outside, and only the base and the globe can be visually recognized. By doing so, it is possible to obtain a bulb-type fluorescent lamp that is identical in appearance to a general incandescent bulb.

  The lighting device for lighting the fluorescent lamp may be accommodated in the globe or may be accommodated in the base and fixed. The connection between the fluorescent lamp and the lighting device is generally a structure in which the lead wire derived from the electrode means is connected to the connection pin mounted on the circuit board constituting the lighting device, but the lead wire derived from the lighting device and You may connect by twisting the lead wire derived | led-out from the electrode means, and the connection method is not specifically limited.

  The bulb-type fluorescent lamp according to claim 2 is characterized in that a rotation preventing means is provided in a gap between one end side of the globe and the cover body.

  The rotation preventing means is a means provided to prevent relative rotation between the cover body and the globe. For example, the rotation preventing means is composed of a convex portion provided on the outer peripheral surface on one end side of the globe and a silicone resin filled in a gap between the convex portion and the cover body. If it is this structure, since a convex part and a silicone resin latch, relative rotation of a cover body and a glove can be prevented. In addition, the convex part may be provided in the cover body side, and the structure which provides a recessed part instead of a convex part and latches it with a silicone resin may be sufficient.

  The bulb-type fluorescent lamp according to claim 3, wherein the globe is moved in the state where the fluorescent lamp is supported by the cover body and the globe is brought into contact with the fluorescent lamp by moving the globe to the other end side. Sometimes, the glove has a predetermined dimensional relationship such that one end side edge portion of the globe is located on the other end side with respect to the cover body.

  According to a fourth aspect of the present invention, there is provided a lighting fixture comprising: the bulb-type fluorescent lamp; and a fixture body on which the bulb-type fluorescent lamp is mounted.

  According to the light bulb shaped fluorescent lamp according to claim 1, since the globe is formed of a divided body divided into a plurality of parts, it approximates the external shape of a general incandescent light bulb without requiring special processing of the globe such as heating. In addition, it is possible to accommodate a fluorescent lamp having a predetermined shape in which the intermediate portion has the maximum width dimension in the envelope. Moreover, since the engaging part which engages with the one end side of a glove is provided in the inner peripheral surface side of the other end side of a cover body in the shape of a circumference, it is strong so that the division | segmentation body of a glove may not isolate | separate. The glove can be attached to the cover body while being joined.

  According to the bulb-type fluorescent lamp of claim 2, since the rotation preventing means is provided in the gap between the one end side of the globe and the cover body, the relative rotation between the globe and the cover body can be prevented. .

  According to the light bulb shaped fluorescent lamp according to claim 3, when the inner wall surface of the globe and the fluorescent lamp are brought into contact with one end side from the position on the other end side to the position where the globe and the cover body engage with each other. Since the moving distance has a predetermined dimension larger than that of the engaging portion, the fluorescent lamp can be attached to the cover body after the fluorescent lamp is supported on the cover body, and can be attached to the cover body. Assembling work becomes easy.

  According to the lighting fixture of Claim 4, the illuminating device which has an effect | action of the lightbulb-type fluorescent lamp as described in any one of Claim 1 thru | or 3 can be provided.

  Hereinafter, an embodiment of a light bulb shaped fluorescent lamp of the present invention will be described with reference to the drawings.

  FIG. 1 is a side sectional view of a bulb-type fluorescent lamp according to a first embodiment of the present invention. The globe 10 of the bulb-type fluorescent lamp 50 is formed by combining two divided parts 10a and 10a made of a translucent resin material. The globe 10 has an opening 11 on one end side, and has a PS shape in which the top on the other end side is substantially spherical, and is bulged so that the intermediate portion has the maximum outer diameter. The globe 10 is formed in a rotating body shape having a straight line passing through the approximate center of the opening 11 and the vertex 10b on the other end side as a central axis. The divided bodies 10a and 10a are obtained by dividing the globe 10 so as to be symmetrical with respect to a plane including the central axis. Further, on one end side of the globe 10, a protruding portion 10 c that protrudes continuously in a circular shape on the outer peripheral surface side of the globe 10 is provided.

  Reference numeral 13 denotes a cover body made of PBT resin, which has an opening edge portion slightly larger than the outer diameter of the opening portion 11 of the globe 10 on the other end side, and has a substantially cylindrical shape that expands toward the other end side. Is formed. The other end side of the cover body 13 supports one end side of a fluorescent lamp 20 to be described later by a holder 26, and the opening 11 of the globe 10 covering the fluorescent lamp 20 is attached to the opening edge. On the inner peripheral surface of the opening edge portion of the cover body 13, a part of the wall surface continuously protrudes in an annular shape, and an engaging portion 13a is formed. The engaging portion 13a engages with the protruding portion 10c of the globe so that the cover body 13 and the globe 10 are connected. On one end side of the cover body 13 is formed a cylindrical projection 14 having a thread formed on the outer peripheral surface thereof, and a cap 30 is screwed onto the cylindrical projection 14 to be crowned. The base shell portion constituting the base 30 is formed by, for example, forming a conductive metal such as brass or copper into a cylindrical shape.

  Hereinafter, the base 30 side will be described as one end side (upper side in FIG. 1), and the top side of the globe 10 will be described as the other end side (lower side in FIG. 1).

  The fluorescent lamp 20 has an arc tube 21 having a double spiral structure. The arc tube 21 is formed in a spiral shape with the central portion in the longitudinal direction of the straight tube bulb as a top 23, and a pair of straight portions 22 located on one end side of the arc tube 21 has a longitudinal direction that is the central axis of the fluorescent lamp 20. They are arranged side by side so as to be substantially parallel. The maximum width of the pair of linear portions 22 of the arc tube 21 is smaller than the maximum diameter located at the intermediate portion of the arc tube 21, and spirals so that the diameter decreases from the intermediate portion toward the top portion 23 located on the other end side. It is formed in a shape. The arc tube 21 having such a shape forms a discharge path curved along the inner surface of the PS-shaped globe 10 and becomes the arc tube 21 having the maximum discharge path length. The lamp efficiency can be made higher than that of a conventional arc tube that is substantially the same as the inner diameter of 11.

  The arc tube 21 has, for example, a tube outer diameter of 6 to 13 mm, about 7 mm in the present embodiment, a tube inner diameter of 5.5 to 11.5 mm, about 6 mm in the present embodiment, and a discharge path formed to about 400 mm. Has been. The arc tube 21 is preferably made of glass, but may be formed of a light-transmitting material such as ceramics.

  A phosphor layer is applied directly or indirectly to the inner surface of the arc tube 21. Examples of the phosphor layer include, but are not limited to, rare earth metal oxide phosphors and halophosphate phosphors. However, in order to improve luminous efficiency, it is preferable to use a three-wavelength emission type phosphor in which phosphors emitting red, blue and green light are mixed.

  A discharge medium is enclosed in the arc tube 21. The discharge medium consists of an inert gas such as argon, neon, krypton, xenon, and mercury.

  A pair of linear portions 22 positioned at both ends of the discharge path formed in the arc tube 21 are provided with sealing portions 25 for sealing a pair of electrodes 24 connected to a lighting device 40 described later. Yes. A lead wire is led out from the sealing portion 25. Further, the arc tube 21 is supported by the holder 26 at the straight portion 22. The holder 26 is attached to the circuit board 41 and the cover body 13. The holder 26 can be attached by a method such as silicone resin or engagement. Here, the cover body 13 supports the holder 26 that holds the arc tube 21 and the circuit board 41. That is, the globe 10 is not subjected to loads such as the arc tube 21 and the circuit board 41, and no force is applied in the direction of separating the divided bodies 10a from each other. For this reason, in the case of a lamp in which the globe is composed of a plurality of divided bodies, the connection strength between the divided bodies of the globe is higher in the configuration of the present invention than in the lamp configured to support the circuit board, the arc tube, and the like. Also, by placing the cover body 13 between the base and the globe, the elasticity of the cover body can be improved even when the gap required for insertion cannot be secured only by the elasticity of the globe when attaching the globe. It can be engaged using. That is, a glove can be attached more reliably. With this configuration, the glove can be attached after the parts other than the glove are assembled, and therefore, the manufacture is facilitated.

  The lighting device 40 for lighting the fluorescent lamp 20 includes a disk-shaped circuit board 41 and electronic components 42 mounted on both surfaces of the circuit board 41 so as to be orthogonal to the longitudinal direction of the arc tube 21. An inverter circuit for lighting the fluorescent lamp 20 at a high frequency is configured. The circuit board 41 has substantially the same diameter as the inner diameter of the opening 11 of the globe 10 and is fixed to the inner peripheral edge of the cover body 13 by fixing means (not shown). However, it may be fixed in the vicinity of the opening 11 as long as it does not affect the bonding strength between the divided bodies 10a. The input end of the high-frequency lighting circuit composed of these components is electrically connected to the base 30 side. In the present embodiment, the lead wires connected to the pair of electrodes 24 are directly mounted on the lighting device 40, but by twisting the lead wires respectively derived from the lighting device 40 side and the fluorescent lamp 20 Electrical connection may be made. In addition, as long as it is possible to stand the wrapping pin on the circuit board 41, a method of winding and connecting a lead wire led out from the fluorescent lamp 20 may be used.

  FIG. 2 is an enlarged cross-sectional view of a main part of the bulb-type fluorescent lamp of FIG. In FIG. 2, the circuit board 41 and the lamp 20 are not shown for convenience of explanation.

  As shown in FIG. 2, the globe 10 and the cover body 13 are connected to each other by engaging a protruding portion 10c and an engaging portion 13a. The protruding portion 10c is continuously provided around the opening 11 of the globe 10, and the engaging portion 13a is continuously provided on the inner wall surface of the opening edge of the cover body 13a. When one end portion side of the globe 10 in a state where the divided bodies 10a and 10a are joined is inserted into the other end side of the cover body 13, the protruding portion 10c and the engaging portion 13a come into contact with each other, and both of them are elastically deformed so that the protruding portion 10c Is engaged over the engaging portion 13a. At this time, since the inner wall surface of the cover body 13 and the protruding portion 10c are in contact with each other, the divided bodies 10a and 10a of the globe 10 cannot be displaced in the direction in which they are separated from each other, and the divided bodies 10a and 10a are firmly joined. . Furthermore, a configuration in which the inner wall surface of the cover body 13 is held by a predetermined elastic force so as to sandwich the protruding portion 10c may be employed.

  In addition, since the end of one end of the globe 10 abuts the cover body 13a and the insertion of the globe 10 into the cover body 13 over a predetermined distance is restricted, positioning when the globe 10 and the cover body 13 are assembled. Can be made easier. In addition, it is preferable that an engaging means is provided so that the divided bodies 10a and 10a of the globe 10 are engaged with each other at the contact surfaces with which the divided bodies 10a and 10a come into contact. Furthermore, the contact surfaces on which the divided bodies 10a and 10a contact each other may be bonded with silicone resin.

  By filling the gap between the globe 10 and the cover body 13 with the silicone adhesive 27, the movement of the globe 10 can be restricted and fixed more reliably. Further, by providing the silicone adhesive 27, the globe 10 and the cover body 13 are reliably bonded.

  Next, the assembly process of the bulb-type fluorescent lamp according to the first embodiment of the present invention will be described with reference to FIG.

  First, as shown in FIG. 3A, a globe 10 is formed by combining resin-made divided bodies 10 a and 10 a having a light diffusion layer formed in advance on the inner surface so as to cover the arc tube 21. At this time, the holder 26 and the lighting device 40 are connected to the arc tube 21. The lighting device 40 may have a structure that is supported inside the globe 10 when the divided bodies 10a and 10a are combined.

  Next, as shown in FIG. 3B, the cover body 13 is connected to the opening 11 of the globe 10. Further, one end side of the fluorescent lamp 20 is accommodated in the other end side of the cover body 13. The cover body 13 accommodates the holder 26 and the lighting device 40 inside. Then, as shown in FIG. 3C, the fluorescent lamp 20 having a spiral bulb having a diameter larger than that of the opening 11 is accommodated. Then, the lighting device 40 and the base 30 are electrically connected and the base 30 is attached to the cylindrical protrusion 14 to complete the bulb-type fluorescent lamp 50.

  In the bulb-type fluorescent lamp of the present embodiment, the globe 10 and the cover body 13 are fixed by engagement. Therefore, in order to engage the globe 10 with the cover body 13 with the arc tube 21 and the cover body 13 fixed, the globe 10 is moved to some extent while the arc tube 21 is accommodated in the globe 10. It is necessary to let However, when the globe 10 is formed by combining the divided bodies 10a so as to cover the arc tube 21 before the cover body 13 is attached, for example, if there is a space in the globe 10 that can accommodate the arc tube 21. The lamp can be assembled even when there is not much gap between the two. For this reason, if it is a manufacturing method shown in FIG. 3, the shape of the globe 10 and the arc_tube | light_emitting_tube 21 can be formed comparatively freely.

  Next, a bulb-type fluorescent lamp according to the second embodiment will be described.

  As shown in FIG. 4, the arc tube 21 'is formed by further heating the substantially central portion of the straight tubular glass bulb and bending the middle portion of the U-shaped bulb bent into a U shape into a curved or arcuate shape. A plurality are connected. Hereinafter, the arc tube 21 'will be described.

  This arc tube 21 ′ has a shape in which the middle part of the U-shaped bulb is formed in a curved shape or an arc shape so that the middle part having the maximum width dimension bulges in the outer circumferential direction. A curved discharge path is formed along the inner surface of the PS-shaped globe 10. Therefore, since the arc tube 21 'has a discharge path length as large as possible as in the first embodiment, the lamp efficiency is higher than that of a conventional arc tube whose maximum width is almost the same as the inner diameter of the opening 11 of the globe 10. Can be high. In addition, a slight gap is formed between the intermediate portions of the U-tube bulbs adjacent to each other by forming a curved shape or an arc shape, and the central axis of the arc tube 21 ′ is formed by this gap. Since the light from the U-shaped tube bulbs facing each other is easily transmitted, there is an advantage that the total luminous flux value of the arc tube 21 ′ is improved. 4 does not show the sealing portion of the arc tube 21 ′, but the sealing portion of the arc tube 21 ′ is the electrode sealing end portion on one end side of the arc tube 21 ′ as in the first embodiment. Are provided by means such as a stem seal or a pinch seal, and lead wires connected to the electrodes are led out from the sealing portion. As shown in FIG. 4A, one end side of the arc tube 21 'is held by a holder 26 made of a heat-resistant member, and the arc tube 21' and the lighting device 40 are connected. The globe 10 is formed by combining the divided bodies 10a and 10a so as to cover the holder 26 and the arc tube 21 '. Thereafter, a light bulb shaped fluorescent lamp 50 'is completed through steps similar to those shown in FIGS. 3 (b) and 3 (c).

  FIG. 5 is an enlarged cross-sectional view of a main part of a bulb-type fluorescent lamp that is a third embodiment of the present invention.

  As shown in FIG. 5, in the gap between the cover body and the globe, a plurality of projections 10d provided at the end of the globe 10 and the silicone adhesive 27 filled in the gap between the projections 10d and the cover body 13 are provided. An anti-rotation means is provided. The silicone adhesive 27 filled in the gap between the convex portion 10d and the cover body 13 and the convex portion 10d are locked, so that the relative rotation between the globe 10 and the cover body 13 is prevented.

  In this configuration, the silicone adhesive 27 disposed in the gap between the convex portion 10d and the cover body 13 is for preventing the globe 10 from rotating. However, if the silicone resin is arranged around the entire periphery of the convex portion as in this configuration, the convex portion 10d and the silicone resin 27 pass through the approximate center of the opening 11 and the vertex 10b on the other end side in the direction of the central axis. Can also be locked. For this reason, it is also possible to regulate the movement in this direction.

  Although the fluorescent lamp 20 having the spiral bulb larger in diameter than the opening 11 has been described, the shape of the arc tube is not limited to this as long as it has a portion larger in diameter than the opening 11. Further, the third embodiment can be manufactured by an assembly process similar to that of the first and second embodiments.

  Next, a bulb-type fluorescent lamp according to a fourth embodiment of the present invention will be described.

  The fourth embodiment has a predetermined separation dimension between the inner wall surface of the globe and the fluorescent lamp. The operation and effect of this configuration will be described with reference to the process diagrams showing the assembly process of the bulb-type fluorescent lamp shown in FIGS. 6 (a), (b), and (c) are process diagrams for the spiral arc tube, and FIGS. 7 (a), (b), and (c) are intermediate portions of the U-shaped tube bulb. FIG. 4 is a process diagram for arc tubes connected in a curved or arcuate form. 6 and FIG. 7 are only different in assembly order from FIG. 3 and FIG. 4, respectively, and the other configurations are the same. Therefore, the same configurations are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 6A, a fluorescent lamp 20 in which one end side of the arc tube 21 is accommodated in the other end side of the cover body 13 is prepared. At this time, the fluorescent lamp 20 and the base 30 are electrically connected to the lighting device 40 accommodated in the cover body 13, and the base 30 is attached to the cylindrical protrusion 14. Then, the divided bodies 10a and 10a are combined from both sides of the fluorescent lamp 20 to form the globe 10. The globe 10 has one edge of the globe 10 when the fluorescent lamp 20 is supported by the cover body 13 and the globe 10 is moved to the other end so that the inner wall surface of the globe 10 and the fluorescent lamp 20 come into contact with each other. There is a predetermined dimensional relationship such that the portion is located on the other end side of the cover body 13. Therefore, in a state where the globe 10 is moved to the other end side, the protruding portion 10c and the engaging portion 13a can be separated from each other so that the globe 10 can be separated in the lateral direction.

  At this time, the components such as the circuit board 41 and the arc tube 21 are supported by the cover body 13, and these components do not apply a force to separate the globe 10. In this way, the connection strength can be ensured by adopting a configuration in which the globe 10 is not subjected to a load that is separated by other components.

  Next, as shown in FIG. 6B, the opening 10 of the globe 10 is connected to the cover body 13 by moving the globe 10 to the cover body 13 and engaging the protruding portion 10c with the engaging portion 13a. To do.

  Then, as shown in FIG. 3C, the fluorescent lamp 20 having a spiral bulb having a diameter larger than that of the opening 11 is accommodated in the globe 10, and the bulb-type fluorescent lamp 50 is completed. . 7 (a), (b), and (c) complete the light bulb-type fluorescent lamp 50 'through the same steps as in FIGS. 6 (a), (b), and (c).

  When the fluorescent lamp 20 is attached to the cover body 13 after the globe 10 is attached to the fluorescent lamp 20, the work efficiency is lowered due to the globe 10 being an obstacle to the work. However, according to the present embodiment, since the globe 10 can be attached after the fluorescent lamp 20 is connected to the cover body 13 and the lighting device 40, the assembling work efficiency is improved.

  According to the bulb-type fluorescent lamp of each of the above embodiments, the globe 10 is configured by combining the divided bodies 10a and 10a, the opening 11 on one end side is reduced in diameter, and the substantially spherical portion 12 is formed on the other end side. Since it is formed, the bulb-type fluorescent lamp can be brought close to the external shape of a general incandescent bulb.

  Further, the globe 10 and the cover 13 can be reliably connected by the protruding portion 10c and the engaging portion 13a.

  Further, since the cover body 13 comes into contact with the globe 10 and a pressing force is applied so as to be opposed from the outer surface of the globe 10, the divided bodies 10a are firmly joined to each other. Since the cover body 13 and the globe 10 are made of resin, they can be processed and molded with high accuracy. For this reason, the cover body 13 and the globe 10 can be reliably brought into contact with each other, and there is no problem in the mounting operation of the globe 10 due to the dimensional deviation of the opening 11.

  Further, if the silicone adhesive 27 is disposed in the gap between the globe 10 and the cover body 13, the globe 10 and the cover body 13 can be securely fixed. Further, if the convex portion 10d is provided on one end side of the globe 10 and the silicone adhesive 27 is disposed in the gap between the globe 10 and the convex portion 10d to be locked to the convex portion, the divided bodies 10a are arranged on the outer surface. Can be reliably bonded together and the movement of the globe 10 can be restricted. In particular, the relative rotation between the globe 10 and the base 30 can be suppressed when the bulb-type fluorescent lamps 50, 50 'are mounted on the instrument.

  Further, if a predetermined separation dimension is provided between the globe 10 and the arc tube 21, the assembling process is facilitated and the working efficiency is increased.

  As shown in FIG. 8, a luminaire 81, which is a downlight, for example, has a luminaire main body 82, and a socket 83 and a reflector 84 are mounted in the luminaire main body 82. The socket 83 has a light bulb shaped fluorescent lamp. 50 is installed.

1 is a side sectional view of a bulb-type fluorescent lamp that is a first embodiment of the present invention. The principal part expanded sectional view of the lightbulb-type fluorescent lamp of FIG. Schematic of the principal part expanded cross section of the bulb-type fluorescent lamp which is the 2nd Embodiment of this invention. Process drawing which shows the assembly process of the lightbulb-type fluorescent lamp of 1st and 2nd embodiment. FIG. 5 is a process diagram showing an assembly process of a bulb-type fluorescent lamp having a different shape of the arc tube of FIG. 4. Process drawing which shows the assembly process of the lightbulb-type fluorescent lamp which is the 3rd Embodiment of this invention. FIG. 7 is a process diagram showing an assembly process of a bulb-type fluorescent lamp having a different shape of the arc tube of FIG. 6. Schematic of the illuminating device using the lightbulb-type fluorescent lamp of this embodiment.

Explanation of symbols

  10 Globe, 11 Opening, 12 Spherical part, 13 Cover body, 20 Fluorescent lamp, 21, 21 'Arc tube, 24 Electrode means, 25 Sealing part, 30 Base, 40 Lighting device, 50,50 '... bulb-shaped fluorescent lamp.

Claims (4)

An arc tube formed so that the width dimension on one end side provided with the sealing portion is smaller than the maximum width dimension from the other end side to the intermediate portion, the phosphor layer formed on the inner surface of the arc tube, light emission A fluorescent lamp having a discharge medium enclosed in a tube and electrode means provided so as to be able to generate one bent discharge path in the arc tube;
Consists of a combination of divided bodies divided from the one end to the plane along the other end, the opening at one end is reduced in diameter, the middle portion bulges from the one end, and is approximately spherical at the other end A glove in which the fluorescent lamp is housed in an internal space formed with a portion;
A base is provided at least on the outer surface side of one end side, and an engaging portion that engages with one end side of the globe in a state where the divided bodies are joined to each other is formed on the inner peripheral surface side of the other end side. A cover housing at least a part of the fluorescent lamp and a lighting device for lighting the fluorescent lamp;
A bulb-type fluorescent lamp characterized by comprising:   The bulb-type fluorescent lamp according to claim 1, wherein a rotation preventing means is provided in a gap between one end side of the globe and the cover body.   In the state where the fluorescent lamp is supported by the cover body, the glove moves the glove to the other end side, and when the inner wall surface and the fluorescent lamp come into contact with each other, 3. The bulb-type fluorescent lamp according to claim 1, wherein the fluorescent lamp has a predetermined dimensional relationship so as to be located on the other end side of the cover body. A bulb-type fluorescent lamp according to any one of claims 1 to 3;
An instrument body equipped with this bulb-type fluorescent lamp;
The lighting fixture characterized by comprising.

Images