JP2010040293A - Fluorescence tube holder and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluorescent tube holder to support a plurality of fluorescent tubes in which the whole unit is made thin, the supporting state of an individual socket is stabilized, and an elastic deformation force of an electrode support member to constitute the socket can be sufficiently demonstrated. <P>SOLUTION: A plurality of sockets 31 and a first belt plate 32 and a second belt plate 33 are formed of an identical metal plate. In the socket 31, the electrode supporting member group 37 is bent upward from the socket base portion 34. Projection pieces 35a, 35b extending from the socket base portion 34 are folded back 180 degrees and the support plate portion 36 is arranged adhered to the lower side of the socket base portion 34. The support plate portion 36 is embedded into the insulation base 20 to support the socket 31 and an opening 22 is formed in the insulation base 20, and the electrode supporting member group 37 extends upward from the opening 22 without receiving a restraint of the insulation base 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fluorescent tube holder for holding electrode portions of a plurality of fluorescent tubes used in a backlight device for a liquid crystal display device and the like, and a manufacturing method thereof.

  In a liquid crystal display device used for a display of a television or a personal computer, a backlight device is provided on the back of a transmissive liquid crystal cell. In this backlight device, a fluorescent tube holder is attached to each of both side portions of the main body base disposed on the back of the liquid crystal cell. The fluorescent tube holder has a long shape, and a plurality of sockets are supported at intervals along the longitudinal direction. The electrode portion provided at one end of the fluorescent tube is held by the socket of one fluorescent tube holder, and the electrode portion provided at the other end of the fluorescent tube is held by the socket of the other fluorescent tube holder. The As a result, the plurality of fluorescent tubes are installed parallel to each other and spaced apart in the longitudinal direction of the fluorescent tube holder.

  In the conventional fluorescent tube holder described in the following Patent Document 1, sockets each independently assembled are fixed to a surface of a substrate formed of a rectangular plate material with a space therebetween. . The socket has a metal contact holding portion attached to a housing formed of a plastic material, and a convex portion provided at the bottom of each housing is fitted into an attachment hole formed in the substrate. Thus, the socket is positioned and fixed on the board.

The conductive path for energizing each socket is composed of a conductive metal thin film formed on the surface of the substrate.
JP 2006-344602 A

  The conventional fluorescent tube holder has a structure in which a plurality of individually assembled sockets are fixed to the surface of a long and thin substrate. Therefore, the strength is low between adjacent sockets, and the substrate is not in operation. I worry about breaking.

  Further, in the conventional fluorescent tube holder, the sockets are assembled independently, and it is necessary to position and attach each socket to the substrate, so that the assembly work takes time. In addition, each socket has a housing, and the housing is fixed to the substrate, so that there is a drawback that the thickness cannot be reduced.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a thin fluorescent tube holder in which a plurality of sockets are positioned and attached with high accuracy.

  Another object of the present invention is to provide a fluorescent tube holder that can secure insulation between sockets and can secure a deformation margin of electrode holding pieces constituting the sockets.

  Furthermore, an object of the present invention is to provide a method of manufacturing a fluorescent tube holder that can efficiently manufacture the fluorescent tube holder with few steps.

The present invention relates to a fluorescent tube holder in which a plurality of conductive sockets having a pair of electrode holding pieces for holding electrode portions provided at end portions of the fluorescent tube are arranged.
A long insulating base formed of a synthetic resin material is provided, and the sockets are arranged at intervals along the longitudinal direction of the insulating base,
Each socket includes a base portion formed of a metal plate, the electrode holding piece bent upward from the base portion, and is formed integrally with the base portion and is folded back to the lower side of the base portion. And a support plate portion located on the lower side, and the support plate portion is embedded and supported in the insulating base.

  In the fluorescent tube holder of the present invention, the metal plate extending from the base portion is bent to the lower side of the base portion to form the support plate portion, so that the support plate portion projects to both sides of the base portion on the lower side of the electrode holding piece. It is formed in a wide area. By embedding this support plate portion in the insulating base, the base portion of the electrode holding piece can be stably supported on the insulating base.

  In addition, since the base portion of the holder is embedded in a long insulating base formed of a synthetic resin material, the fluorescent tube holder can be configured to be thin.

  In the present invention, it is preferable that an opening is formed on the surface of the insulating base, and a bending boundary between the base and the electrode holding piece and a part of the support plate are exposed in the opening.

  If the support plate portion appears in the opening of the insulating base and the electrode holding piece extends upward from the support plate portion, the bending boundary between the electrode holding piece and the base portion is not buried in the insulating base, and the base portion of the electrode holding piece The tip can be used as the deformation area. Therefore, it is possible to configure an electrode holding piece that reliably holds the electrode portion without being constrained by the insulating base.

  In the present invention, a plurality of the base portions and the electrode holding pieces are formed of the same metal plate, and a part of the metal plate between the adjacent sockets is bent to form the support plate portion. Can be configured.

  Alternatively, in the present invention, the strip extending in the arrangement direction of the plurality of sockets is formed of the same metal plate as the base and the electrode holding piece, and a part of the metal plate between the socket and the strip Is bent to form the support plate portion.

  As described above, the support plate portion is formed by the metal plate between the adjacent sockets, or the support plate portion is formed by the metal plate between the socket and the band plate, so that the metal plate is not wasted. Use efficiency is improved.

The present invention relates to a method of manufacturing a fluorescent tube holder in which a plurality of conductive sockets having a pair of electrode holding pieces for holding electrode portions provided at end portions of the fluorescent tube are arranged.
(A) A plurality of sockets having a base portion and the electrode holding pieces bent upward from the base portion are formed of the same metal plate, and a part of the metal plate continuous from each of the base portions is formed under the base portion. Folding back to the side and forming a support plate portion located on the lower side of the electrode holding piece;
(B) forming an insulating base in which the support plate portion provided in the plurality of sockets is embedded with a synthetic resin material;
It is characterized by having.

  In the method for manufacturing a fluorescent tube holder according to the present invention, in the step (b), a bent boundary portion between the base portion and the electrode holding piece and a part of the support plate portion are formed on the surface of the insulating base in the step (b). It is preferable to form an opening through which is exposed.

  Furthermore, in the manufacturing method of the fluorescent tube holder according to the present invention, in the step (a), a part of the metal plate between the adjacent sockets can be bent to form the support plate portion. Alternatively, in the step (a), a band plate extending in the direction in which the plurality of sockets are arranged is formed of the metal plate, and a part of the metal plate between the socket and the band plate is bent to support the support plate. A plate part can be formed.

  The fluorescent tube holder of the present invention is provided with a support plate portion that protrudes in an area wider than the opposing interval of the electrode holding pieces on the lower side of the socket, and this support plate portion is embedded and supported in an insulating base. It is possible to position the base of the socket on the base with high accuracy and to support it stably. Further, since the base portions of the plurality of sockets are embedded in the common insulating base, the fluorescent tube holder can be configured to be thin.

  In addition, if an opening for exposing the support plate portion is formed on the surface of the insulating base, the electrode holding piece can be elastically deformed without being constrained by the insulating base from the base to the tip.

  According to the manufacturing method of the present invention, a fluorescent tube holder that is thin and has a holder positioned with high accuracy can be efficiently manufactured with a small number of steps.

  FIG. 1 is a plan view of the backlight device, and FIG. 2 is an enlarged cross-sectional view showing a cross section of the backlight device of FIG. 1 taken along line II-II. FIG. 3 is a perspective view showing the fluorescent tube holder of the first embodiment used in the backlight device, and FIG. 4 shows a metal part embedded in the insulating base of the fluorescent tube holder shown in FIG. FIG. 5 is a perspective view showing a metal plate for forming the metal part. 6A is an enlarged front view of the fluorescent tube holder shown in FIG. 3 as viewed from the direction of the arrow VI, and FIG. 6B is a cross-sectional view of FIG. 6A.

  As shown in FIG. 2, the backlight device 1 is disposed on the back surface of the liquid crystal cell 5. The liquid crystal cell 5 is a transmissive type capable of full color display. The light emitted from the backlight device 1 makes it possible to clearly see the image of the liquid crystal cell 5.

  As shown in FIGS. 1 and 2, the backlight device 1 has a metal base 2. The main body base 2 is formed by bending an iron plate such as a rolled steel plate. The main body base has a shallow box shape, a rectangular bottom plate 2a, long side plates 2b and 2c bent at right angles from the long sides of the bottom plate 2a, and a short side plate bent at right angles from the short sides of the bottom plate 2a. 2d, 2e.

  The metal plate constituting the main body base 2 is plated or coated on the surface, but is further processed so that the inner surface 2f of the bottom plate 2a facing the fluorescent tube 70 can function as a reflecting surface. . For example, a thin white sheet is laid on the inner surface 2f, a thin metal sheet is laid, or white or metal color coating is applied.

  As shown in FIG. 1, a pair of long fluorescent tube holders 10 and 10 are fixed to an inner surface 2 f of the bottom plate 2 a of the main body base 2. One fluorescent tube holder 10 is fixed to the bottom plate 2a just inside the short side plate 2d of the main body base 2, and the other fluorescent tube holder 10 is fixed to the bottom plate 2a just inside the short side plate 2e of the main body base. It is fixed. The fluorescent tube holder 10 arranged inside the short side plate 2d and the fluorescent tube holder 10 arranged inside the short side plate 2d are exactly the same, but their arrangement directions are 180 degrees different. .

  The fluorescent tube holder 10 is configured by embedding a metal portion 30 shown in FIG. 4 in an insulating base 20 formed of a synthetic resin material shown in FIG. A socket 31 is formed by a part of the metal part 30. The socket 31 is exposed upward from an opening 22 formed on the surface 21 of the insulating base 20, and the socket 31 is provided at a certain interval in the longitudinal direction of the insulating base 20.

  As shown in FIG. 1, the fluorescent tube holder 10 provided on the inner side of the short side plate 2d and the fluorescent tube holder 10 provided on the inner side of the short side plate 2e are arranged so that the sockets 31 face the same position on the left and right, respectively. Is done. The fluorescent tube 70 is held between the fluorescent tube holders 10 on both sides. The fluorescent tube 70 includes an arc tube 71 and electrode portions 72 and 72 provided on both sides thereof. The electrode portions 72 and 72 on both sides are fitted into the socket 31 of the right fluorescent tube holder 10 and the socket 31 of the left fluorescent tube holder 10 shown in FIG. Is disposed at a position slightly away from the inner surface 2 f of the bottom plate 2 a of the main body base 2.

  The electrode portions 72 of the plurality of fluorescent tubes 70 are fitted into all the sockets 31 provided in the fluorescent tube holder 10. In the embodiment shown in FIG. 1, a total of 12 fluorescent tubes 70 are attached in the main body base 2.

  The fluorescent tube 70 shown in FIGS. 1 and 3 is an EEFL type, and a capacitor for generating a voltage at the time of lighting is incorporated in the electrode portion 72, and it is necessary to attach the capacitor to the fluorescent tube holder 10 Absent.

  The metal part 30 shown in FIG. 4 is formed by being bent from the hoop material 30A. As shown in FIG. 5, the hoop material 30A has a connecting plate 30B on the side, and the hoop material 30A and the connecting plate 30B are integrally joined by a rib 30D at a constant interval. Feed holes 30E are formed in the connecting plate 30B at regular intervals in the longitudinal direction.

  The metal plate constituting the hoop material 30A and the connecting plate 30B is an iron plate such as a rolled steel plate that is conductive and has high strength. A steel sheet whose surface is plated with a low-resistance metal material such as gold is preferably used.

  By applying a transfer force to the feed hole 30E, the connecting plate 30B and the hoop material 30A are integrally fed out in the longitudinal direction (Y1 direction). When the hoop material 30A is transferred in the longitudinal direction and sent to the pressing process, each part is bent to form the metal part 30 shown in FIG. Furthermore, by applying a transfer force to the feed hole 30E, the metal part 30 is sent to the insert injection molding process, the insulating base 20 with the metal part 30 inserted is formed of a synthetic resin material, and the fluorescent tube holder 10 is formed. Complete. Thereafter, the rib 30D is cut, and the fluorescent tube holder 10 is separated from the connecting plate 30B.

  As shown in FIG. 5, the hoop material 30 </ b> A includes a first strip 32 and a second strip 33 that extend in parallel in the longitudinal direction of the fluorescent tube holder 10, and the rib 30 </ b> D has a first rib 30 </ b> D. It is connected to the second strip 33. The hoop material 30 </ b> A is provided with a base connecting piece 34 </ b> A that connects the first band plate 32 and the second band plate 33. The base connecting pieces 34A are formed at regular intervals in the longitudinal direction of the hoop material 30A. Between the first band plate 32 and the second band plate 33, a pair of holding plate pieces 37A and 37C extending from the base connecting piece 34A in the Y2 direction and a pair extending from the base connecting piece 34A in the Y1 direction. The holding plate pieces 37B and 37D are integrally formed.

  As shown in FIG. 5, the hoop material 30 </ b> A includes a support plate by a part of the metal plate located between the holding plate pieces 37 </ b> A and 37 </ b> C extending in the Y <b> 2 direction and the holding plate pieces 37 </ b> B and 37 </ b> D extending in the Y <b> 2 direction. A piece 36A is formed. A protruding plate piece 35A is formed integrally with the support plate piece 36A, and the protruding plate piece 35A is integrally connected to the base connecting piece 34A between the holding plate piece 37A and the holding plate piece 37C. ing.

  In the pressing step, the holding plate pieces 37A and 37C protruding in the Y2 direction from the base connecting piece 34A are bent upward to form the electrode holding pieces 37a and 37c shown in FIG. 4, and the base connecting piece 34A to Y1 are formed. Holding plate pieces 37B and 37C protruding in the direction are bent upward to form electrode holding pieces 37b and 37d, and individual sockets 31 are formed. As shown in FIGS. 4 and 6B, the socket 31 has a socket base 34 that connects the first strip 32 and the second strip 33, and an electrode is provided from the Y2 side of the socket base 34. The holding pieces 37a and 37c rise, and the electrode holding pieces 37b and 37d rise from the Y1 side of the socket base 34. The socket base 34 has a width dimension in the Y1-Y2 direction that is substantially the same as the width dimension of the base connecting piece 34A before being bent.

  Further, in the pressing step, the protruding plate piece 35A shown in FIG. 5 is folded back 180 degrees in the middle to become an upper protruding piece 35a and a lower protruding piece 35b stacked below the upper protruding piece 35a, as shown in FIG. Then, as shown in FIGS. 4 and 6B, the support plate piece 36A shown in FIG. 5 is stacked under the socket 31 to form the support plate portion 36 that is in close contact with the lower surface of the socket base 34.

  As shown in FIG. 5, the width dimension W1 in the X1-X2 direction of the support plate portion 36A is a width dimension obtained by combining the holding plate piece 37A and the holding plate piece 37C (the holding plate piece 37B and the holding plate piece 37D are combined). Width dimension) which is larger than W2. Therefore, in the metal part 30 of FIG. 4, the support plate part 36 located under the socket 31 protrudes to the X1 side from the electrode holding pieces 37a and 37b, and protrudes in the X2 direction from the electrode holding pieces 37c and 37d. Yes. Further, as shown in FIGS. 4 and 6B, the support plate portion 36 protrudes toward the Y2 side from the bending boundary portion between the electrode holding pieces 37a and 37c and the socket base 34, and the electrode holding piece 37b. , 37d and the socket base portion 34 project beyond the bending boundary portion to the Y1 side.

  In FIG. 4, the electrode holding pieces 37 a, 37 b, 37 c, and 37 d provided in one socket 31 are shown as one set of electrode holding pieces group 37. The metal part 30 includes a pair of electrode holding piece groups 37 arranged in the longitudinal direction at a predetermined interval, and between the adjacent sockets 31, the electrode holding pieces 37a, 37b, 37c, 37d and A notch 38 is formed after the support plate 36 is cut out.

  As shown in FIGS. 4 and 5, the electrode holding pieces 37a, 37b, 37c, 37d and the support plate portion 36 are formed by cutting the metal plate between the first band plate 32 and the second band plate 33. The metal material is used efficiently because it is formed by bending.

  As shown in FIG. 4, a connector electrode 39 is provided at the end of the first band plate 32. The connector electrode 39 is formed by bending a conductive metal plate different from the metal plate forming the loop member 30A, and is fixed to the upper surface of the first strip plate 32 by welding.

  In the insert injection molding process, the metal part 30 shown in FIG. 4 is held inside an injection mold, and a synthetic resin material is injected into the mold to form the insulating base 20. As a result, as shown in FIG. 2, the first strip 32 and the second strip 33 of the metal part 30 are embedded in the insulating base 20. Further, as shown in FIG. 6B, a part of the support plate portion 36 arranged at the base portion of each socket 31 and the upper protruding pieces 35a and the lower protruding pieces 35b are embedded in the insulating base 20. Is done.

  In the portion where each socket 31 is provided, a rectangular opening 22 is formed in the surface 21 of the insulating base 20. A part of the support plate 36 is located in the entire area of the opening 22.

  As shown in FIG. 6B, a gap Wa is formed between the bend boundary between the electrode holding pieces 37b and 37d and the socket base 34 and the inner edge of the opening 22 on the Y1 side. A gap Wa is formed between the boundary between the bent portions 37a and 37c and the socket base 34 and the inner edge of the opening 22 on the Y2 side. Furthermore, a gap is also formed between the electrode holding pieces 37a and 37b and the inner edge of the opening 22 on the X1 side, and between the electrode holding pieces 37c and 37d and the inner edge of the opening 22 on the X2 side. A gap is also formed.

  In the insert injection molding process, when the metal part 30 is held in the mold, a rectangular frame-like insert is inserted into the cavity, and the electrode holding pieces 37a, 37b, 37c, 37d are inserted into the insert. The tip of the nest is brought into contact with the surface of the support plate 36 by entering the frame. In this state, the opening 22 is formed by supplying synthetic resin into the cavity. At the bottom of the opening 22, the upper surface of the support plate 36 appears over the entire area, and the electrode holding pieces 37a, 37b, 37c, and 37d are not subjected to binding force by the insulating base 20. , Projecting upward from the surface 21 of the insulating base 20.

  As shown in FIG. 3, the long insulating base 20 includes an opposing side edge portion 20 a facing the short side plate 2 d of the main body base 2, and an extended side edge from which the fluorescent tube 70 held by the socket 31 extends. It has a part 20b.

  An insulating wall 23 is formed integrally with the surface 21 of the insulating base 20 so as to rise substantially vertically on the opposite edge 20a side. As shown in FIG. 6A, each of the plurality of insulating walls 23 faces the socket 31 from the side of the opposite side edge portion 20a. Therefore, when the electrode portion 72 of the fluorescent tube 70 is attached to the electrode holding piece group 37 of the socket 31, the end surface 72 a of the electrode portion 72 faces the insulating wall 23.

  As shown in FIG. 3, a connector portion 24 that protrudes upward from an end portion is integrally formed on the surface 21 of the insulating base 20. The connector portion 24 has a connector housing 24a and an insertion space 24b formed in the connector housing 24a, and a connector electrode 39 shown in FIG. 4 appears in the insertion space 24b.

The insulating base 20 has a plurality of mounting holes 25 penetrating the front and back.
In this fluorescent tube holder 10, a first strip 32 and a second strip 33 are embedded within the insulating base 20 over almost the entire length, and the first strip 32 and the second strip 33 are embedded. Are connected to all the sockets 31 and pass through the side portions of all the sockets 31.

  As shown in FIG. 2, the first band plate 32 and the second band plate 33 are not exposed on the front surface 21 and the back surface 27 of the insulating base 20 over the entire length thereof. Furthermore, the 1st strip 32 is not exposed from the end surface 28 of the opposing side edge part 20a of an insulation base over the full length. That is, the first strip 32 and the second strip 33 are completely covered with the synthetic resin on the back surface 27, and the first strip 32 is covered with the synthetic resin on the end surface 28.

  As shown in FIG. 1, the fluorescent tube holder 10 has an elongated shape and an insulating base 20 made of synthetic resin, and a first strip 32 and a second strip 33 are formed in the longitudinal direction inside the fluorescent holder 10. Since it is embed | buried, the intensity | strength of the elongate insulating base 20 can be raised with the 1st strip | belt board 32 and the 2nd strip | belt board 33. FIG. In particular, the first band plate 32 and the second band plate 33 pass through the side portions of the plurality of sockets 31, and a metal band plate is always formed between the adjacent sockets 31 and 31. Therefore, the probability that the insulating base 20 is damaged by bending stress during the operation can be extremely reduced.

  Further, in each socket 31, a support plate portion 36 having a large area is provided so as to be in close contact with the lower surface of the socket base portion 34, and this support plate portion 36 is made of a synthetic resin material constituting the insulating base 20. It is buried inside. Therefore, the base portion of each socket 31 is accurately positioned on the insulating base and supported with sufficient strength. Therefore, a failure such that the metal socket 31 is detached from the insulating base 20 is unlikely to occur.

  Further, an opening 22 is formed in the surface 21 of the insulating base 20 at the base of the socket 31, and the bases of the respective electrode holding pieces 37 a, 37 b, 37 c, and 37 d protrude upward from the opening 22. Therefore, the electrode holding pieces 37a, 37b, 37c, and 37d are not restrained by the insulating base 20, and the whole can be used as a deformation region, and the electrode portion 72 of the fluorescent tube 70 is reliably held by the electrode holding pieces. Further, the insulating base 20 is not cracked by the force by which the electrode holding pieces 37a, 37b, 37c, and 37d are deformed.

  In addition, since the electrode holding pieces 37a, 37b, 37c, and 37d extend upward from the middle portion of the thickness of the insulating base 20, the fluorescent tube holder 10 can be configured to be thin.

  As shown in FIG. 1, the fluorescent tube holder 10 is installed on the bottom plate 2a of the main body base 2, and mounting screws inserted through a plurality of mounting holes 25 are screwed into the bottom plate 2a and fixed. Then, a power supply plug is attached to the connector portion 24, and power is supplied to the connector electrode 39. The electric power given to the connector electrode 39 is given to each socket 31 via the first strip plate 32 and the second strip plate 33. The metal part 30 shown in FIG. 4 is press-molded from the same metal plate except for the connector electrode 39 so that the first band plate 32 and the second band plate 33 function as respective current paths. Therefore, manufacture is easy. The connector electrode 39 may be integrally bent from the first band plate 32 or the second band plate 33.

  In the fluorescent tube holder 10, the electrode holding pieces 37 a, 37 b, 37 c, 37 d constituting the socket 31 are exposed from the surface 21 of the insulating base 20, but on the back surface 27 of the insulating base 20, Since the second strip 33 is not exposed and a layer of synthetic resin exists between the bottom plate 2a of the main body base 2 and the two strips 32, 33, the bottom plate 2a A high withstand voltage between the two strips 32 and 33 can be secured.

  Further, as shown in FIG. 2, the first strip 32 is not exposed from the end face 28 at the opposite side edge 20 a of the insulating base 20. Therefore, the dielectric strength between the first strip 32 and the short side plate 2d of the main body base 2 can be maintained high. Furthermore, since the insulating wall 23 made of synthetic resin rises between the end surface 72a of the electrode portion 72 of the fluorescent tube 70 attached to the socket 31 and the metal short side plate 2d, the electrode portion 72 and the main body base 2 are raised. It will be possible to ensure sufficient insulation.

  FIG. 7 is a perspective view showing a fluorescent tube holder 110 according to a second embodiment of the present invention, and FIG. 8 is a perspective view of a metal portion 130 embedded in the insulating base 120 of the fluorescent tube holder 110. FIG. 9 is a cross-sectional view of the fluorescent tube holder 110 of FIG. 7 taken along line IX-IX.

  In the fluorescent tube holder 110 according to the second embodiment, the metal part 130 shown in FIG. 8 is embedded in the insulating base 120 made of synthetic resin shown in FIG. 7, and the surface 121 of the insulating base 120 is spaced in the longitudinal direction. A metal socket 131 appears with a gap.

  A CCFL type fluorescent tube 170 is attached to the fluorescent tube holder 110. The fluorescent tube 170 has an elongated arc tube 171 and linear electrode portions 172 protruding from both ends of the arc tube 171. Since the CCFL type fluorescent tube 170 does not have a capacitor in the electrode portion, the fluorescent tube holder 110 needs to be provided with a capacitor 160 interposed between the energizing portion and each socket 131. Although the capacitor 160 connected to the two right sockets 131 is illustrated in FIG. 7, the capacitors 160 are actually connected to all the sockets 131 of the fluorescent tube holder 110.

  As shown in FIG. 8, the metal part 130 has a band plate 133 extending continuously in the longitudinal direction (Y1-Y2) of the fluorescent tube holder 110 and a small distance from the band plate 133 to the right side (X1 side). And a socket 131 disposed therein. The sockets 131 are arranged at regular intervals in the longitudinal direction (Y1-Y2 direction) of the fluorescent tube holder 110.

  The socket 131 has a support plate portion 136 and an electrode holding piece group 137 disposed thereon. The support plate portion 136, the electrode holding piece group 137, and the strip plate 133 are formed by cutting out from the same metal hoop material. Similar to the hoop material 30A of the first embodiment, the hoop material is formed by plating a surface of a conductive metal plate such as a steel plate with a low resistance material such as gold.

  The electrode holding piece group 137 includes a socket base 134, electrode holding pieces 137a and 137c that are integrally bent upward from the Y1 side of the socket base 134, and electrode holding that is integrally bent upward from the Y2 side of the socket base 134. It has pieces 137b and 137d. A projecting piece 135 extending in the X2 direction is formed integrally with the socket base part 134, and the support plate part 136 is integrally connected to the projecting piece 135.

  In the hoop material before being bent as shown in FIG. 8, the support plate portion 136 is located between the socket base portion 134 and the strip plate 133, and the socket base portion 134, the electrode holding piece group 137, the support plate portion 136, and The strip 133 is integrated with a flat metal plate. By pressing the hoop material, the electrode holding pieces 137a and 137c and the electrode holding pieces 137b and 137d are bent upward from the socket base portion 134, and the boundary portion between the support plate portion 136 and the strip plate 133 is cut. The projecting piece 135 is bent 180 degrees, and the support plate 136 comes into close contact with the lower surface of the socket base 134.

  The strip 133 is embedded in the insulating base 120 so as to extend in the longitudinal direction. In addition, at the base portion of each socket 131, a support plate portion 136 is embedded in an insulating material constituting the insulating base 120. As shown in FIG. 9, in a portion where the socket 131 is provided, an opening 122 is formed in the surface 121 of the insulating base 120, and a support plate 136 appears at the bottom of the opening 122. The edge of the opening 122 is separated from the base of each electrode holding piece 137a, 137b, 137c, 137d in the X1-X2 direction and the Y1-Y2 direction, and the electrode holding pieces 137a, 137b, 137c, 137d are The insulation base 120 can be deformed without being constrained.

  Further, since the support plate portion 136 is formed by cutting and bending the metal plate between the socket base portion 134 and the strip plate 133, the use efficiency of the metal plate is improved and the yield of the material is improved.

  As shown in FIG. 8, a plurality of electrode portions 133 a are formed on the band plate 133, and the electrode portions 136 a are also formed on the support plate portion 136. As shown in FIG. 7, the electrode portion 133 a of the strip plate 133 and the electrode portion 136 a of the support plate portion 136 appear in the opening 123 of the surface 121 of the insulating base 120. Capacitors 160 are installed in the respective openings 123, one terminal of the capacitor 160 is soldered to the electrode part 133a, and the other terminal is soldered to the electrode part 136a.

  As shown in FIG. 8, the strip plate 133 is provided with a connector electrode 139. The connector electrode 139 is formed of a conductive leaf spring material having a high spring property that is separate from the strip plate 133, and the connector electrode 139 is fixed to the upper surface of the strip plate 133 by welding means or the like.

  In the fluorescent tube holder 110 shown in FIG. 7, a tube holding portion 124 that is integral with the insulating base 120 is formed on the left side (X2 side) of the electrode holding piece group 137. The tube holding portion 124 has a U-shaped holding groove. As shown in FIG. 7, the end portion of the arc tube 171 of the fluorescent tube 170 is held by the tube holding portion 124 made of synthetic resin, and the electrode holding piece in which the linear electrode portion 172 is formed of a leaf spring material. It is held between the groups 137.

  Further, the insulating base 120 is integrally formed with a pair of sandwiching pieces 125a and 125b protruding from the upper surface thereof. One holding piece 125a is provided outside the electrode holding pieces 137a and 137c, and the other holding piece 125b is provided outside the electrode holding pieces 137b and 137d. After the electrode portion 172 of the fluorescent tube 170 is sandwiched between the electrode holding pieces 137a and 137c and the electrode holding pieces 137b and 137d, the electrode holding pieces 137a, 137b, 137c, and 137d are held by the holding piece 125a and the holding piece 125b, respectively. Is sandwiched between the upper part of the sandwiching piece 125a and the upper part of the sandwiching piece 125b. Thereby, the holding state of the electrode part 172 by the electrode holding pieces 137a and 137c and the electrode holding pieces 137b and 137d is stabilized.

  As shown in FIG. 7, a current-carrying connector portion 126 is integrally formed on the surface 121 of the insulating base 120, and the connector electrode 139 appears on the connector portion 126. Furthermore, mounting holes 128 are formed through the insulating base 120 at a plurality of locations.

  The fluorescent tube holder 110 shown in FIG. 7 also has a high bending strength in the longitudinal direction because the metal strip 133 is embedded in the long insulating base 120. Further, since the support plate portion 136 at the base portion of the electrode holding pieces 137a, 137b, 137c, and 137d is embedded in the insulating base 120, the support strength of each socket 131 can be increased. Furthermore, as shown in FIG. 9, an opening 122 is formed on the surface 121 of the insulating base 120, and the respective electrode holding pieces 137 a, 137 b, 137 c, and 37 d are not restrained by the insulating base 120 from the opening 122. Since it extends upward, the electrode holding portions 137a, 137b, 137c, and 137d can exhibit elastic force without being constrained.

  When the fluorescent tube holder 110 is energized to the connector electrode 139, the electric power is transmitted to the strip plate 133 and given to the electrode holding portion 137 of the socket 131 through the respective capacitors 160.

  Similar to the fluorescent tube holder 10 shown in FIG. 3, the band plate 133 is embedded in the insulating base 120, and the band plate 133 is not exposed on the back surface 127 of the insulating base 120. Therefore, when the fluorescent tube holder 10 is installed on the bottom plate 2a of the metal main body base 2, a high withstand voltage between the band plate 133 and the bottom plate 2a can be secured.

  The band plate 133 is disposed on the left side of each socket 131, that is, on the side where the arc tube 171 of the fluorescent tube 170 extends from the socket 131. Therefore, the distance between the band plate 133 that is the current path and the short side plate 2d of the main body base 2 can be kept long, and the insulation between the band plate 133 and the short side plate 2d can be easily maintained. Also, as shown in FIG. 8, only one strip 133 is arranged on the left side, and the sockets 131 are arranged at intervals in the longitudinal direction, so that the space between the adjacent sockets 131 can be effectively used. A mounting hole or the like can be easily formed in this portion.

A plan view of a backlight device disposed on the back of the liquid crystal display device; The expanded sectional view which cut | disconnected the backlight apparatus of a figure by the II-II line | wire, The perspective view which shows the fluorescent tube holder of the 1st Embodiment of this invention, The perspective view which shows the metal part embed | buried under the insulation base of the fluorescent tube holder of 1st Embodiment, The perspective view which shows the hoop material for forming the metal part of the fluorescent tube holder of 1st Embodiment, (A) is the enlarged side view which looked at the fluorescent tube holder shown in FIG. 3 from the VI arrow direction, (B) is sectional drawing of (A), The perspective view which shows the fluorescent tube holder of the 2nd Embodiment of this invention, The perspective view which shows the metal part embed | buried under the insulation base of the fluorescent tube holder of 2nd Embodiment, Sectional drawing which cut | disconnected the fluorescent tube holder shown in FIG. 7 with the IX-IX line,

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Backlight apparatus 2 Main body base 2a Bottom plate 2d, 2e Short side plate 5 Liquid crystal cell 10 Fluorescent tube holder 20 Insulation base 21 Front surface 22 Opening 23 Insulation wall 24 Connector part 27 Back surface 30 Metal part 30A Hoop material 31 Socket 32 1st belt | band | zone Plate 33 Second strip 34 Socket base 36 Support plate 37 Electrode holding piece group 37a, 37b, 37c, 37d Electrode holding piece 39 Connector electrode 70 Fluorescent tube 72 Electrode portion 110 Fluorescent tube holder 120 Insulating base 121 Surface 124 Tube holding Part 130 metal part 133 strip 131 socket 134 socket base 136 support plate part 137 electrode holding piece group 137 connector electrode 170 fluorescent tube 172 electrode part

Claims (8)

In the fluorescent tube holder in which a plurality of conductive sockets having a pair of electrode holding pieces for holding the electrode portions provided at the ends of the fluorescent tubes are arranged,
A long insulating base formed of a synthetic resin material is provided, and the sockets are arranged at intervals along the longitudinal direction of the insulating base,
Each socket includes a base formed of a metal plate, the electrode holding piece bent upward from the base, and formed integrally with the base and folded back to the lower side of the base. A fluorescent tube holder, comprising: a support plate portion positioned on a lower side, wherein the support plate portion is embedded and supported in the insulating base.   The fluorescent tube holder according to claim 1, wherein an opening is formed on a surface of the insulating base, and a bending boundary between the base and the electrode holding piece and a part of the support plate are exposed in the opening. .   The said base part and the said electrode holding piece are formed from the same metal plate, and a part of metal plate between the said adjacent sockets is bend | folded, and the said support plate part is formed. Fluorescent tube holder.   A strip extending in the direction in which the plurality of sockets are arranged is formed of the same metal plate as the base and the electrode holding piece, and a portion of the metal plate between the socket and the strip is bent and the The fluorescent tube holder according to claim 1, wherein a support plate portion is formed. In the method of manufacturing a fluorescent tube holder in which a plurality of conductive sockets having a pair of electrode holding pieces for holding the electrode portions provided at the ends of the fluorescent tubes are arranged,
(A) A plurality of sockets having a base portion and the electrode holding pieces bent upward from the base portion are formed of the same metal plate, and a part of the metal plate continuous from each of the base portions is formed under the base portion. Folding back to the side and forming a support plate portion located on the lower side of the electrode holding piece;
(B) forming an insulating base in which the support plate portion provided in the plurality of sockets is embedded with a synthetic resin material;
A method of manufacturing a fluorescent tube holder, comprising:   6. The fluorescent tube according to claim 5, wherein in the step (b), an opening is formed on the surface of the insulating base so that a bent boundary portion between the base portion and the electrode holding piece and a part of the support plate portion are exposed. Manufacturing method of the holder.   The method for manufacturing a fluorescent tube holder according to claim 5 or 6, wherein in the step (a), a part of a metal plate between adjacent sockets is bent to form the support plate portion.   In the step (a), the support plate portion is formed by forming a strip extending in the direction in which the plurality of sockets are arranged with the metal plate, and bending a part of the metal plate between the socket and the strip. The manufacturing method of the fluorescent tube holder of Claim 5 or 6 which forms.

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