JP3843556B2 - Fluorescent lamp and lighting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention,The present invention relates to a fluorescent lamp that protects against a burnout of a synthetic resin base or melting of a glass tube at the end of its life and an illumination device using the same.
[0002]
[Prior art]
  Conventionally, a hot cathode type has been mainly used for a fluorescent lamp for general illumination.
[0003]
  A hot cathode fluorescent lamp has a pair of hot cathode electrodes at both ends of a discharge vessel. The hot cathode electrode is configured by connecting a filament coated with an electron emitting substance between a pair of inner wells.
[0004]
  Thus, the operating principle of the fluorescent lamp is generally as follows. That is, when a predetermined hot cathode heating voltage is applied to the fluorescent lamp and the electrode is heated by energization, the electron emitting material is heated by the red heat of the filament and emits thermoelectrons when the hot cathode electrode is in the cathode phase. To do. These electrons are attracted and moved by the anode on the opposite side, and discharge starts. Electrons flowing by the discharge collide with mercury atoms in the discharge vessel and ionize the mercury atoms. Ultraviolet rays are generated by ionization of mercury atoms, and the ultraviolet rays enter the phosphor particles of the phosphor layer formed on the inner surface side of the discharge vessel. Then, the phosphor particles are excited to generate visible light.
[0005]
  By the way, in many cases, the life of the fluorescent lamp that does not illuminate is reduced when the electron emitting material deposited on the filament gradually decreases during start-up or during lighting. This is because the scattered electron emitting material adheres to the surface of the stem, thereby causing the stem surface to conduct and causing a short circuit phenomenon. It is extremely rare for the decrease in electron-emitting material to proceed to the same extent for a pair of hot-cathode electrodes at the same time, and usually the decrease in electron-emitting material in either one of the hot-cathode electrodes proceeds first. The end of life. At the end of such life, the fluorescent lamp performs half-wave discharge, and at this time, the temperature in the vicinity of the hot cathode electrode abnormally rises.
[0006]
  In recent years, fluorescent lamps with a small discharge vessel diameter, such as compact fluorescent lamps that have been used frequently, can not reduce the hot cathode electrode in proportion to the tube diameter. The hot-cathode electrode becomes large and approaches the glass tube. In particular, the temperature rise becomes excessive, and in a severe case, the glass tube may be melted.
[0007]
  Further, since the bases of fluorescent lamps with a small tube diameter in recent years tend to use a base made of synthetic resin, the base may be burned out due to an excessive temperature rise at the end of the above-mentioned life.
[0008]
  Conventionally, measures for solving such problems at the end of the life have been taken from various aspects. For example, in a fluorescent lamp that is used in a state where it is built in an automobile or a portable device, a thermal element is arranged in the vicinity of the electrode, and an excessive temperature rise at the end of the life is sensed to control the lighting device, Japanese Patent Application Laid-Open No. 4-61740 discloses that if one having different electrode lifetimes is set in advance and the thermal element is disposed only on the short-life electrode, only one thermal element may be used. ing.
[0009]
[Problems to be solved by the invention]
  However, even in the prior art, there are still many problems to be solved for practical application by applying to a fluorescent lamp for general illumination.
[0010]
  That is, in a fluorescent lamp for general illumination that is often used in an exposed state, the hot cathode electrode is generally located at a position away from the base toward the center of the discharge vessel, so that the thermal element is located near the electrode. If it arrange | positions, a thermal element will be exposed outside and will give a user discomfort.
[0011]
  Further, since the output of the thermal element is fed back to the lighting device to control the lighting device, it is difficult to incorporate the thermal element into the fluorescent lamp.
[0012]
  Therefore, even if the thermal element is disposed on the lighting device side, in the case of general illumination, the fluorescent lamp is required to be compatible with products of different manufacturers. The position of the hot-cathode electrode with respect to the discharge tube belongs to the design matters and is currently different for each manufacturer. Therefore, it is difficult to perform the end-of-life protection operation equally for any manufacturer's product. It is.
[0013]
  An object of the present invention is to provide a fluorescent lamp that is practical and suitable for general illumination and a lighting device using the same while performing a protection operation at the end of the lifetime.
[0014]
[Means for achieving the object]
    The fluorescent lamp of the invention of claim 1 has an outer diameter of 23 mm or less.BentGlass discharge tubeNext to each otherBoth endsPartA fluorescent lamp body provided with a hot cathode electrode; and a synthetic resin die base having an insertion hole into which an end of a glass discharge tube is inserted, and a partition wall defining the insertion hole, An arrangement space formed in a part of the partition wall of the base body and communicated with the insertion hole; and a base having a contact supported by the synthetic resin base body; and in a connection circuit between the hot cathode electrode and the contact Placed in series with the synthetic resin die baseInsideArranged inTheAnd a thermal fuse.
[0015]
  In the present invention and each of the following inventions, the definitions and technical meanings of terms are as follows unless otherwise specified.
[0016]
  The present invention relates to various fluorescent lamps called so-called compact fluorescent lamps such as FDL type, FML type, FWL type, FHT type, FUL type, FPR type and FPL type.Equipped with a bent glass discharge tubeAdapts to the format.
[0017]
  The “fluorescent lamp body” means the remaining part excluding the base of the fluorescent lamp. Bent fluorescent lamp bodyGlassWhen the discharge tube is provided, one glass tube may be bent or two or more glass tubes may be connected.
[0018]
  In the fluorescent lamp body, a phosphor layer is formed on the inner surface side of a glass discharge tube, and mercury and a rare gas such as argon are enclosed as a discharge medium. GlassMadeThe inner surface of the discharge tube is glassMadeIt is used to encompass the case where the phosphor layer is directly formed on the inner surface of the discharge tube and the case where the phosphor layer is formed indirectly via a protective film or the like.
[0019]
  As the phosphor layer, it is preferable to use a three-wavelength emission type rare earth phosphor. However, the present invention is not limited to this, and other phosphors such as a calcium halophosphate phosphor can be used. Further, depending on the purpose of use, a phosphor emitting green light or the like can be used.
[0020]
  Mercury can be encapsulated in pure mercury or in the form of an amalgam. When encapsulated in the form of pure mercury, it can be enclosed in a glass capsule or the like.
[0021]
  As a hot cathode type electrode,GlassDischarge tubeBoth adjacent to each otherFrom the edgeRespectivelyA coil filament can be connected between a pair of sealed inner wells, and an electron emitting substance can be further attached to the filament.
[0022]
  The “cap” means a means that is attached to the fluorescent lamp body and is connected to a socket to receive power required for lighting, and it does not matter whether it has a function of supporting the fluorescent lamp. Therefore, the present invention provides power receiving and mechanical support of the lamp at the same time as seen in a compact fluorescent lamp, and the support of the lamp depends on another support means as seen in a high-frequency fluorescent lamp. Applies to both.
[0023]
  In addition, the base includes a synthetic resin base, but it is allowed to have various shapes and structures depending on the type of fluorescent lamp.
[0024]
  Further, the base of the synthetic resin base mainly accommodates the end portion of the fluorescent lamp body inside, and the end portion is fixed to the base by an appropriate means or the necessary wiring is performed. A space is provided, and an arrangement space for arranging a thermal fuse is provided. A suitable means for attaching the end of the fluorescent lamp body to the base is to apply a silicone-based adhesive to the gap between the end and the base and bond them together.
[0025]
  Furthermore, when the fluorescent lamp body has both ends of the discharge tube relatively close to each other, a base having a single structure common to both ends is used. In this case, the partition located between each pipe | tube edge part can be formed in a synthetic resin base die base.
[0026]
  Furthermore, the base has power receiving means. A contact is used as a power receiving means.
[0027]
  The arrangement space isIn the present invention, generally, a synthetic resin base die baseFormed in the interior spaceThe first aspect to be,It means any one of the second modes formed in the wall space of the synthetic resin base. The first aspect includes a case where the thermal fuse is exposed and disposed in the internal space, a case where the thermal fuse is disposed in a silicone adhesive filled in the internal space, and a synthetic resin base. This includes the case where it is disposed in the insertion hole formed in the base. In addition, when the former temperature fuse is exposed and disposed in the internal space, it includes a configuration in which it is suspended in the internal space, attached to the inner wall of the internal space, or brought into contact with the inner wall. . When the latter is disposed in an embedded state in the silicone adhesive filled in the internal space, a thermal fuse is embedded in the silicone adhesive for fixing both ends of the glass discharge tube to the base. Includes configuration. In the second aspect, “inside the wall space” means a space that is a part of the wall if no thermal fuse is provided. That is, in the present invention, in order to accommodate the thermal fuse, the thermal fuse can be accommodated by forming an arrangement space in a portion that should originally constitute the wall.
[0028]
  The wall space is preferably the thinnest part of the partition wall that defines the part where both ends of the fluorescent lamp body are inserted into the synthetic resin base, in other words, the part where both ends are closest It is preferable to form by removing. If a thermal fuse is disposed in this portion, the thermal fuse can be made sensitive to the temperature at both ends of the fluorescent lamp. Therefore, a protection operation can be performed for the end of the life of both ends using one temperature fuse.
[0029]
  However, the wall space has a place other than the above that can be used for arranging the thermal fuse. For example, the partition wall is a portion relatively close to the outer surface of the synthetic resin die base. Although this portion has a large distance between both end portions, if the thermal fuse is arranged so that both end portions of the thermal fuse are close to the respective end portions, the sensitivity is not lowered. This part also has an advantage that it is easy to secure a storage space for the thermal fuse. Filling the gap formed around the thermal fuse after arranging the thermal fuse in the arrangement space consisting of the wall space is advantageous in fixing the thermal fuse and improving the sensitivity.
[0030]
In the present invention, the space for disposing the thermal fuse is formed in the partition wall defining the insertion hole of the synthetic resin base and is formed in communication with the insertion hole. Therefore, it belongs to the second aspect.
[0031]
  “Thermal fuse” means a conductor having a function of breaking an electric circuit by melting at a set temperature. Thermal fuses include those in which a portion to be melted is accommodated in a container and those in which the portion to be melted is exposed, and any of them can be used in the present invention. The operating temperature of the thermal fuse is lower than the temperature at which the glass discharge tube melts (about 700 ° C. in the case of LM glass), and higher than the temperature at the time of manufacture and the temperature at which the fluorescent lamp is normally lit. It is preferable that the temperature is higher than the temperature.
[0032]
  Use an appropriate number of thermal fuses.be able to.For exampleOne or two can be used for each hot cathode electrode.Furthermore, if necessary, only one piece may be used if heat can be received from both ends of the fluorescent lamp.
[0033]
  The fluorescent lamp of the present invention is combined with an inverter lighting device and a socket to constitute a fluorescent lamp lighting device. In this case, the inverter lighting device converts the power source into a high frequency and outputs it. In the socket, the four receivers are arranged at positions corresponding to the respective corners of the square, the pair of output lines of the inverter lighting device are connected to two of the four receivers, and the remaining two receivers. With a starting circuit connected to the gold.
[0034]
  As described above, when the output line of the inverter lighting device is connected to two of the four receptacles of the socket and the starter circuit is connected to the remaining two, the base of the fluorescent lamp depends on the connection position. The thermal fuse can be configured to be connected to the inverter lighting device side regardless of which direction is connected. That is, the fluorescent lamp becomes nonpolar. This means that the temperature fuse is connected to the start circuit side depending on the connection position of the inverter lighting device and the start circuit to the socket.
[0035]
  Regardless of the orientation of the lamp base, the temperature fuse is connected to the inverter lighting device side, that is, to make it nonpolar, the output line of the inverter lighting circuit must be connected. Connect to a diagonal receipt. Therefore, the starting circuit is also connected to the other diagonally received money. In this case, if the thermal fuse is sensitive to the heat at both ends, only one thermal fuse may be used.
[0036]
  Further, a thermal fuse can be connected between the fluorescent lamp and the inverter lighting device no matter how the base of the fluorescent lamp is connected to the socket. That is, for each hot cathode electrode, one thermal fuse is connected to external lead wires that are in a diagonal relationship with each other. However, since any one of the temperature fuses is connected to the starting circuit and thus cannot be protected, it is desirable that any one of the temperature fuses be sensitive to the heat at both ends.
[0037]
  Furthermore, the temperature fuse can be reliably connected to the inverter lighting device side by regulating the connection position of the fluorescent lamp to the socket, that is, the polarity of the mounting. For example, a convex portion or a concave portion may be formed on the regular side facing the socket of the base of the fluorescent lamp, and a concave portion or a convex portion that engages with the convex portion or the concave portion may be formed on the corresponding socket.
[0038]
    The fluorescent lamp of the invention of claim 22. The fluorescent lamp according to claim 1, wherein a gap in the space where the temperature fuse is disposed is filled with a silicone-based adhesive.It is characterized by having.
[0039]
  In the present inventionIs advantageous in fixing the thermal fuse and improving the sensitivity.
[0040]
    The fluorescent lamp of the invention of claim 3 is the fluorescent lamp of claim 1 or 2,Both ends of the glass discharge tube andInsertion hole for synthetic resin baseEachA pair is formed so as to be adjacent to each other, and the arrangement space is characterized in that it is formed at a position displaced outward from the partition wall where the pair of insertion holes are closest.
[0041]
  In this invention, there exists an advantage which is easy to ensure the storage space of a thermal fuse. If desired, if a silicone adhesive is filled in the gap formed around the thermal fuse after the thermal fuse is arranged in the arrangement space consisting of the wall space, it is advantageous in fixing the thermal fuse and improving the sensitivity.
[0042]
    The fluorescent lamp of the invention of claim 4 has an outer diameter of 23 mm or less.BentBoth ends of glass discharge tubePartA fluorescent lamp body provided with a hot cathode electrode; a synthetic resin base having insertion holes into which both ends of the glass discharge tube are inserted and fixed; and a contact supported by the synthetic resin base And a glass discharge tube which is interposed in series in the connecting electric circuit between the hot cathode electrode and the contactBothedgesideAnd a silicone-based adhesive filled in a gap around each temperature fuse.
[0043]
  In the present invention, the position where the thermal fuse is disposed is the insertion hole and the gas guide of the synthetic resin base. It may be a space formed between both ends of the Las discharge tube, or may be a wall space formed in the partition wall.
[0044]
  The present invention is provided with the above-described configuration, so that a position where the thermal fuse is disposed is formed at a position facing the insertion hole of the base body to which each end of the glass discharge tube of the fluorescent lamp body is fixed. Since each temperature fuse arranged at each position is opposed to both ends of the glass discharge tube, and the gap around each temperature fuse is filled with silicone adhesive, the fluorescent lamp body High sensitivity to abnormal heat generation at the end of life.
[0045]
    Claim5The illuminating device of the invention is provided with the illuminating device main body; and the illuminating device main body.Any one of 1 to 4And a fluorescent lamp lighting device as described above.
[0046]
  The present invention provides claims 1 to4It is the illuminating device which has the structure and effect | action of this invention. Therefore, in the present invention, the “illuminating device” refers to any device that utilizes light emission of a fluorescent lamp, such as a lighting fixture, a display device, and a reading device.
[0047]
DETAILED DESCRIPTION OF THE INVENTION
  Embodiments of the present invention will be described below with reference to the drawings.
[0048]
    FIG. 1 is a partially cutaway sectional view showing an example of a fluorescent lamp used in the present invention.
[0049]
  In the figure, 1 is a fluorescent lamp body and 2 is a base.
[0050]
  The fluorescent lamp body 1 includes a glass discharge tube 1a, hot cathode electrodes 1b and 1b, and a phosphor layer 1c, and mercury and argon are enclosed as a discharge medium in the glass discharge tube 1a.
[0051]
  The glass discharge tube 1a has two glass tubes 1a1 and 1a1 made of soda-lime glass having an outer diameter of 16.5 mm, a wall thickness of 1.1 mm, and a length of 1100 mm. The hot cathode electrode 1b is sealed with a flare stem at the base ends of the glass tubes 1a1 and 1a1 to form a U-shaped discharge path having a length of 2100 mm.
[0052]
  The connecting pipe 1a2 is formed by blowing.
[0053]
  When the dimension from the inner surface of the distal end of the glass tube 1a1 to the base on the distal end side of the connecting tube is 10 mm or more, the coldest portion can be formed at the distal end portion of the glass tube 1a1. When the above dimensions are less than 5 to 10 mm, a required mercury vapor pressure can be secured by forming the coldest part behind the hot cathode electrode 1b.
[0054]
  The phosphor layer 1c uses a three-wavelength light emitting phosphor.
[0055]
  On the other hand, the base 2 is composed of a synthetic resin base 2a and a contact 2b.
[0056]
  Thus, a thermal fuse (not shown) is disposed in the base 2. The thermal fuse will be described in detail with reference to FIG.
[0057]
    FIG. 2 is a cross-sectional view of the main part showing the first embodiment of the fluorescent lamp of the present invention.
[0058]
  The same parts as those in FIG.
[0059]
  The base 2 includes a synthetic resin base 2a and a contact 2b. The synthetic resin die base 2a has two discharge tube end insertion holes 2a1, 2a1 on the front surface, and an internal space 2a2 communicating with the discharge tube end insertion hole 2a1 is formed inside. The internal space 2a2 also serves as an arrangement space A in which the thermal fuse 3 is arranged. Therefore, the arrangement space A is included in the internal space 2a2. A pair of locking projections 2a3 and 2a3 are formed on both side surfaces of the synthetic resin base 2a. The contact 2b protrudes rearward from the back surface of the synthetic resin base 2a.
[0060]
  Both ends of the glass discharge tube 1a of the fluorescent lamp body 1 are inserted into the discharge tube end insertion holes 2a1 and 2a1 of the synthetic resin base 2a, and silicone.systemThe adhesive 5 is fixed to the synthetic resin base 2a.
[0061]
  A total of four thermal fuses 3 are used in connection with the connection electric circuit 4 at both ends of the hot cathode electrode 1b. Then, it is exposed in the arrangement space A, and thus in the internal space 2 a, and is supported by the connection electric path 4.
[0062]
  In this embodiment, the location where the abnormal temperature rises at the end of the life may be biased depending on the lighting position of the fluorescent lamp, etc., but the four temperature fuses 3 may be distributed and arranged in the internal space 2a2. In this case, any one of the thermal fuses 3 quickly responds and melts to interrupt and protect the electric circuit.
[0063]
  Since the illustrated hot cathode electrode 1b is disposed on the long flare stem 1d, the coldest part can be formed at the tube end of the glass discharge tube 1a. Along with this, the distance between the hot cathode electrode 1b and the thermal fuse 3 becomes relatively large, but since heat is transmitted through the glass of the glass discharge tube 1a, the protection operation by the thermal fuse 3 is not hindered. .
[0064]
    FIG. 3 is a cross-sectional view of a main part showing a second embodiment of the fluorescent lamp of the present invention.
[0065]
  In the figure, the same parts as those in FIG.
[0066]
  This embodiment is different from the first embodiment in that the thermal fuse 3 is embedded in a silicone adhesive 5 that fixes the glass discharge tube 1a to the synthetic resin base 2a.
[0067]
  Since the thermal fuse 3 is embedded in the silicone-based adhesive, the thermal fuse 3 can be fixed in the base 2 without using any other special fixing means.
[0068]
    FIG. 4 is an essential part cross-sectional view showing a third embodiment of the fluorescent lamp of the present invention.
[0069]
  In the figure, the same parts as those in FIG.
[0070]
  This embodiment differs from the preceding embodiment in that the thermal fuse 3 is mounted on the inner surface of the internal space 2a2 of the synthetic resin base 2a2.
[0071]
  A mounting hook 6 is provided on the inner surface of the internal space 2a2 so that the thermal fuse 3 can be easily mounted. The attachment hook 6 can be formed integrally with the synthetic resin base 2a.
[0072]
  In assembling the fluorescent lamp, the temperature fuse 3 may be attached to the attachment hook 6 after the temperature fuse 3 is interposed in the connection circuit 4, or may be connected to the connection circuit 4 after being first attached. Finally, the glass discharge tube 1a is made of silicone.systemThe adhesive 5 is fixed to the synthetic resin base 2a.
[0073]
    FIG. 5 is a cross-sectional view showing a base portion in the fourth embodiment of the fluorescent lamp of the present invention.
[0074]
  In the figure, the same parts as those in FIG.
[0075]
  This embodiment is different in that the thermal fuse 3 is mounted on the bottom surface of the internal space 2a2 of the synthetic resin base 2a.
[0076]
  Since the bottom surface of the internal space 2a2 of the synthetic resin base 2a2 is located away from the silicone adhesive 5 for fixing the glass discharge tube 1a, siliconesystemIt is difficult to react to the high heat generated when the adhesive 5 is cured.
[0077]
  Further, if a thermal fuse is attached to the bottom surface, wiring work is facilitated.
[0078]
    FIG. 6 is an essential part cross-sectional view showing a fifth embodiment of the fluorescent lamp of the present invention.
[0079]
    FIG. 7 is also a side view of the base.
[0080]
    FIG. 8 is also a plan view of the base.
[0081]
  In each figure, the same parts as those in FIG.
[0082]
  In the present embodiment, the thermal fuse 3 is supported by the connection electric path 4 between the hot cathode electrode 1b and the contact 2b of the base 2, and the arrangement space A is the internal space 2a of the synthetic resin base 2a. It is characterized in that it is formed so as to communicate with.
[0083]
  That is, the arrangement space A is formed in a wall surface on the bottom side of the internal space 2a2 of the synthetic resin die base 2a, and further includes a bowl-shaped space communicating with the contact 2b.
[0084]
  Both ends of the glass discharge tube 1a of the fluorescent lamp body 1 are inserted into the discharge tube end insertion holes 2a1 and 2a1 of the synthetic resin base 2a, and silicone.systemThe adhesive 5 is fixed to the synthetic resin base 2a.
[0085]
  The thermal fuse 3 is simply connected in series in the connection electric circuit 4 and is housed and supported in a disposition space A composed of a bowl-shaped space in the internal space 2a2 of the synthetic resin base 2a2. In the drawing, only the end of the left glass discharge tube 1a is shown, and the right side is not shown.
[0086]
  And in this embodiment, since the temperature fuse 3 is accommodated in the arrangement | positioning space A which consists of a mortar-like space of the interior space 2a2 of the synthetic resin base 2a, the connection electric circuit 4 is another Since there is no short circuit due to contact with the connection circuit, and the thermal fuse 3 is difficult to move, it is difficult to break even if vibration or impact is applied.
[0087]
    FIG. 9 is a cross-sectional view showing a base portion in the sixth embodiment of the fluorescent lamp of the present invention.
[0088]
    FIG. 10 is a front view of the same.
[0089]
  In the figure, the same parts as those in FIG.
[0090]
  This embodiment is different in that the temperature fuse 3 is disposed so as to have substantially the same inclination with respect to any position of the base 2 in the internal space 2a2 of the synthetic resin base 2a.
[0091]
  That is, the thermal fuse 3 is mounted at an angle of 45 ° with respect to the bottom surface and side surface of the base 2 as shown in FIG. 9 and inclined at 45 ° within the bottom surface as shown in FIG. Reference numeral 6 'denotes a mounting hook.
[0092]
  Thus, in this embodiment, even if the fluorescent lamp is used in an arbitrary lighting posture, the posture of the thermal fuse 3 is hardly changed, so that the interruption characteristic can be kept almost constant.
[0093]
    FIG. 11 is a cross-sectional view showing a base part in the seventh embodiment of the fluorescent lamp of the present invention.
[0094]
  In the figure, the same parts as those in FIG.
[0095]
  This embodiment is different in that the thermal fuse 3 'can be observed from the outside.
[0096]
  That is, the window 7 is formed on the bottom surface of the base 2a, and the thermal fuse 3 'is disposed on the inner surface side of the window 7. The thermal fuse 3 'is accommodated in the glass container 3a'.
[0097]
  Thus, in the present embodiment, since the operating state of the thermal fuse 3 ′ can be observed from the outside of the base 2, whether or not the cause of the disadvantage of the fluorescent lamp is due to the operation of the thermal fuse 3 ′ at the end of the lifetime. Can be determined.
[0098]
    FIG. 12 is a cross-sectional view showing a base portion in the eighth embodiment of the fluorescent lamp of the present invention.
[0099]
  In the figure, the same parts as those in FIG.
[0100]
  In the present embodiment, a heat-sensitive sheet 8 that changes color at a temperature higher than the operating temperature of the temperature fuse 3 is provided in the vicinity of the temperature fuse 3, and the synthetic resin base 2 a can be observed from the outside of the base 2. A window 7 is formed.
[0101]
  In this embodiment, when the temperature of the thermal fuse 3 reaches the temperature at which the thermal fuse 3 is activated and cut off, the heat-sensitive sheet 8 changes color, so whether the cause of the malfunction is due to the operation of the thermal fuse 3 at the end of the lifetime. Easy to distinguish.
[0102]
    FIG. 13: is a top view which shows the nozzle | cap | die part in 9th Embodiment in the fluorescent lamp of this invention.
[0103]
  In the figure, the same parts as those in FIG.
[0104]
  The present embodiment is different in that the thermal fuse 3 is arranged in an arrangement space A formed in the partition wall 2a4 of the synthetic resin base 2a.
[0105]
  A portion of the partition wall 2a4 of the synthetic resin base 2a4 is cut away to form an arrangement space A, and the thermal fuse 3 is accommodated in the arrangement space A. The gap around the thermal fuse 3 is filled with a silicone adhesive (not shown), thereby making it possible to sense abnormal heat generation at both ends of the glass discharge tube 1a.The arrangement space A communicates with the insertion hole 2a1 formed adjacent to the partition wall as shown in the figure.
[0106]
    FIG. 14 is a plan view showing a base portion in the tenth embodiment of the fluorescent lamp of the present invention.
[0107]
  In the figure, the same parts as those in FIG.
[0108]
  This embodiment is different in that the thermal fuse 3 is disposed in the arrangement space A at a position displaced from the center of the partition wall of the synthetic resin die base 2a to the outer surface side.
[0109]
  By setting the direction in which the thermal fuse 3 is disposed as close as possible to the glass discharge tube 1a, it is possible to reduce a decrease in sensitivity of the thermal fuse 3. In addition, since the above-mentioned position of the base 2 has a relatively large space, the design becomes easy.
[0110]
    FIG. 15 is a cross-sectional view of a principal part showing an eleventh embodiment of the fluorescent lamp of the present invention.
[0111]
  In the figure, the same parts as those in FIG.
[0112]
  The present embodiment is different in that a temperature fuse (not shown) is added as in each of the embodiments described above, or the light flux sensor 9 is provided alone.
[0113]
  The luminous flux sensor 9 is disposed on the base body 2a so as to face both ends of the glass discharge tube 1a, and is connected to a contact 11 disposed on the bottom outer surface of the base body 2a via a lead wire 10. Then, a socket connected to the contact 11 is disposed in a socket (not shown), and when the fluorescent lamp is attached to the socket, the socket is connected to the control means of the inverter lighting device through the socket, and the luminous flux of the fluorescent lamp reaches a predetermined value. When it is reduced, it is determined that the life has expired, and the fluorescent lamp is turned off.
[0114]
    FIG. 16 is a circuit diagram showing a first embodiment of the fluorescent lamp lighting device of the present invention.
[0115]
  In the figure, 21 is an AC power source, 22 is an inverter lighting device, 23 is a socket, 24 is a starting circuit, 25 is a base, and 26 is a fluorescent lamp body.
[0116]
  The inverter lighting device 22 includes a rectifying unit, an inverter unit, and a ballast unit, and sends a high-frequency output between the output lines 22a and 22b.
[0117]
  The socket 23 has four receivers 23a, 23b, 23c, and 23d arranged in a positional relationship between the vertices of a square.
[0118]
  The starting circuit 24 includes a capacitor and is externally attached to or built in the socket 23.
[0119]
  The base 25 is provided with four contacts 25a, 25b, 25c, and 25d facing the respective receptacles 23a, 23b, 23c, and 23d of the socket 23, and one end connected to the contacts 25a and 25c. Thermal fuses 3a and 3b are incorporated.
[0120]
  In the fluorescent lamp main body 26, both ends of one hot cathode electrode 26a are connected to the other end of the thermal fuse 3a and the contact 25b of the base 25, and both ends of the other hot cathode electrode 26b are connected to the other of the thermal fuse 3b. The end and the contact 25d of the base 25 are connected.
[0121]
  Thus, in the connection state shown in the figure, the thermal fuse 3a is interposed between the inverter lighting device 22 and the fluorescent lamp main body 26. Therefore, when the thermal fuse 3a is cut off, the fluorescent lamp main body 26 becomes inconspicuous.
[0122]
  Therefore, if the temperature fuse 3a is made to be sensitive to an abnormal temperature rise at both ends of the fluorescent lamp body 26, it can be protected against the end of life of any hot cathode electrode.
[0123]
  On the other hand, when the base 25 is mounted in the socket 23 in the opposite direction, the thermal fuse 3b is now interposed between the inverter lighting device 22 and the fluorescent lamp body 26 to provide similar protection. Done. That is, in this embodiment, when the thermal fuse 3a or 3b is used alone with respect to the socket 23, it has a polarity. However, since the fluorescent lamp includes both the thermal fuses 3a and 3b, it becomes nonpolar. Become.
[0124]
    FIG. 17 shows the fluorescent lamp lighting device of the present invention.RuIt is a circuit diagram which shows 2nd Embodiment.
[0125]
  In the figure, the same parts as those in FIG.
[0126]
  The present embodiment is different in that the connection of the inverter lighting device 22 to the socket 23 is improved to make the socket 23 non-polar even if there is only one thermal fuse.
[0127]
  That is, the output line of the inverter lighting device 22 is connected to the receptacles 23 a and 23 c that are diagonally connected to the socket 23. Then, the starter circuit 24 is connected to the remaining diagonally received metals 23b and 23d.
[0128]
  In the base 25, the thermal fuse 3 is connected only to the contact 25a.
[0129]
  Thus, at the position shown in the figure, the temperature fuse 3 is interposed between the inverter lighting device 22 and the fluorescent lamp body 26 via the metal receiver 22a to perform a protective operation. On the other hand, when the base 25 is connected in the direction opposite to that shown in the drawing, the thermal fuse 3 is similarly interposed via the metal receiver 23c to perform the protective operation.
[0130]
  If necessary, the second thermal fuse 3 ″ can be connected to a position indicated by a dotted line in the drawing.
[0131]
    Figure18These are the perspective views of the lighting fixture for emergency parking belts in the tunnel which is one Embodiment of the illuminating device of this invention.
[0132]
  In the figure, 41 is a lighting fixture body, and 42 is a fluorescent lamp.
[0133]
  The luminaire main body 41 includes a shallow box-shaped base body 41a having an open bottom surface, a bottom cover 41b for closing the bottom surface opening of the base body 41a, a socket 41c disposed at one end of the base body 41a, and also disposed at the other end. A lamp holder 41d, a reflector (not shown) optically opposed to the fluorescent lamp 42, and an inverter lighting device are provided.
[0134]
  The lower surface cover 41b includes a cover frame 41b1 and a glass plate 41b2 attached to the cover frame 41b1, and is attached to the base body 41a by a hinge 41e and a latch 41f so as to be opened and closed.
[0135]
  The instrument main body 41 is attached to a predetermined place by the attachment arm 41g.
[0136]
  Since the lamp holder 41d is made of metal, when the tip of the fluorescent lamp 42 is the coldest part, the heat radiation action of the coldest part can be supported by supporting the tip.
【The invention's effect】
    According to the inventions of claims 1 to 3, the fluorescent lamp main bodyBentGlass discharge tubeNext to each otherBoth ends are close to each other, the base body of the base is partitioned by a partition wall in which both ends of the glass discharge tube of the fluorescent lamp body are stored, and the thermal fuse is a partition part of the synthetic resin base body And a fluorescent lamp that protects the glass discharge tube in response to an abnormal temperature rise by being disposed in the disposed space and communicating with the insertion hole. it can.
[0137]
    According to the invention of claim 2, the fluorescent lamp capable of improving the sensitivity of the thermal fuse in addition to the fact that the gap in the installation space where the thermal fuse is arranged is filled with the silicone-based adhesive. Can be provided.
    According to the invention of claim 3,Both ends of the glass discharge tube and the insertion holes of the synthetic resin base are formed so as to be adjacent to each other,The location of the space where the thermal fuse is disposed is shifted outward from the partition wall where the pair of insertion holes of the synthetic resin base is closest, so that it is easy to secure the space of the synthetic resin base. A lamp can be provided.
[0138]
    According to the invention of claim 4, the fluorescent lamp bodyBentGlass discharge tubeBothSince it is disposed at a position facing the insertion hole of the base body with the end fixed, each temperature fuse is connected to both ends of the glass discharge tube.sideSince the silicone adhesive is filled in the gap around each thermal fuse, a fluorescent lamp sensitive to abnormal heat generation at the end of the lifetime of the fluorescent lamp body can be provided.
[0139]
    According to the invention of claim 5, claims 1 to4It is possible to provide a lighting device having the following effects.
[Brief description of the drawings]
FIG. 1 is a partially cutaway sectional view showing an example of a fluorescent lamp used in the present invention.
FIG. 2 is a cross-sectional view of an essential part showing a first embodiment of a fluorescent lamp of the present invention.
FIG. 3 is a cross-sectional view of an essential part showing a second embodiment of the fluorescent lamp of the present invention.
FIG. 4 is a cross-sectional view of an essential part showing a third embodiment of the fluorescent lamp of the present invention.
FIG. 5 is a cross-sectional view showing a base part of a fourth embodiment of the fluorescent lamp of the present invention.
FIG. 6 is a cross-sectional view of a main part showing a fifth embodiment of the fluorescent lamp of the present invention.
[Figure 7] Side view of the base
[Figure 8] Plan view of the same base
FIG. 9 is a cross-sectional view showing a base part of a sixth embodiment of the fluorescent lamp of the present invention.
FIG. 10 is also a front view
FIG. 11 is a cross-sectional view showing a base part of a seventh embodiment of the fluorescent lamp of the present invention.
FIG. 12 is a sectional view showing a base portion of an eighth embodiment of the fluorescent lamp of the present invention.
FIG. 13 is a plan view showing a base portion of a ninth embodiment of the fluorescent lamp of the present invention.
FIG. 14 is a plan view showing a base part of a tenth embodiment of the fluorescent lamp of the present invention.
FIG. 15 is a cross-sectional view of a principal part showing an eleventh embodiment of the fluorescent lamp of the present invention.
FIG. 16 is a circuit diagram showing a first embodiment of a fluorescent lamp lighting device according to the present invention.
FIG. 17 is a circuit diagram showing a second embodiment of the fluorescent lamp lighting device of the present invention.
[Figure18A perspective view of an illuminating device in an emergency parking zone in a tunnel which is an embodiment of the lighting device of the present invention
[Explanation of symbols]
      1. Fluorescent lamp body
      1a ... discharge tube made of glass
      1b ... Hot cathode type electrode
      2 ... base
      2a ... Synthetic resin base
      2a1 ... discharge tube insertion hole
      2a2 ... Internal space
      2a3 ... Locking projection
      2b ... Contact
      3. Thermal fuse
      4 ... Connection circuit
      5 ... Siliconesystemadhesive
      A ... Installation space

Claims (5)

A fluorescent lamp body with a hot cathode type electrode on both end portions adjacent to each other of the glass discharge tube which is below the bending outer diameter 23 mm;
A synthetic resin die base having an insertion hole into which each end of the glass discharge tube is inserted, and a partition defining the insertion hole, and an insertion hole formed in a part of the partition of the base A base provided with an arrangement space communicating with the base and a contact supported by a base base made of a synthetic resin;
A temperature fuse disposed within between disposing space of interposed in series synthetic resin die substrate during connection path between the hot cathode type electrode and contacts;
A fluorescent lamp characterized by comprising: 2. The fluorescent lamp according to claim 1 , wherein a gap in the installation space in which the thermal fuse is provided is filled with a silicone-based adhesive . Both ends of the glass discharge tube and the insertion holes of the synthetic resin base are formed so as to be adjacent to each other, and the arrangement space is a position displaced outward from the partition wall where the pair of insertion holes are closest. The fluorescent lamp according to claim 1, wherein the fluorescent lamp is formed as follows. A fluorescent lamp body with a hot cathode type electrode at both ends of the glass discharge tube bent below the outer diameter of 23 mm;
A synthetic resin base having an insertion hole into which both ends of the glass discharge tube are inserted and fixed, and a base having a contact supported by the synthetic resin base;
A temperature fuse disposed respectively at a position opposed to the both end sides of the glass discharge tube with interposed in series in the connection path between the hot cathode type electrode and contacts;
A silicone adhesive filled in the space around each of the thermal fuses;
A fluorescent lamp characterized by comprising: A lighting device body;
A fluorescent lamp according to any one of claims 1 to 4, wherein the fluorescent lamp is disposed in a lighting device body;
An illumination device comprising:

Images