JP4277054B1 - Fluorescent tube holder and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluorescent tube holder for holding a plurality of fluorescent tubes, which has a high strength even when it is long, and can improve insulation between a conductive portion and an external metal portion.
SOLUTION: A plurality of sockets 31, a first strip plate 32, and a second strip plate 33 are formed of the same metal plate, and a base portion of the socket 31 and the first strip plate 32 and the second strip plate 33 are: It is embedded in an insulating base 20 made of synthetic resin. The insulating base 20 has a long shape with a plurality of sockets 31 arranged at intervals, but is reinforced by the first strip 32 and the second strip 33, so that it is damaged during work. Hateful. The first band plate 32 and the second band plate 33 are used as current paths. However, since the band plates 32 and 33 are embedded in the synthetic resin of the insulating base 20, the band plates 32 and 33 and metal It is easy to ensure insulation from the main body base 2 made of metal.
[Selection] Figure 2

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. The backlight device includes a plurality of fluorescent tubes arranged in parallel to each other, a fluorescent tube holder that holds electrode portions formed at both ends of each fluorescent tube, and a main body base that supports the fluorescent tube holder. It is configured.

  The fluorescent tube holder has a long shape and is disposed on both sides of the plurality of fluorescent tubes, and extends in a direction in which the longitudinal direction is orthogonal to the fluorescent tubes. In this fluorescent tube holder, conductive sockets into which the electrode portions of the respective fluorescent tubes are fitted are arranged at intervals in the longitudinal direction, and conductive currents connected to the respective sockets are connected. There is a road.

  As described in Patent Document 1 below, in the conventional fluorescent tube holder, the sockets formed independently are fixed individually to the surface of a substrate formed of a rectangular plate material. 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 sockets arranged in the longitudinal direction are fixed to the surface of a long and thin substrate, so that the strength is low between adjacent sockets, and the substrate is bent during work or the like. I am worried.

  In addition, since the conventional fluorescent tube holder has sockets formed independently, and it is necessary to position and attach each socket to the substrate, it takes time to assemble. Furthermore, since the conductive path for energizing each socket is formed of a conductive metal thin film, there is a problem that it is easily damaged when the substrate is extremely bent.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide a fluorescent tube holder that has a high overall strength and is less likely to be damaged during work, even if it has a long shape.

  Another object of the present invention is to provide a fluorescent tube holder that is easy to assemble and that can have a sturdy and stable shape for a conductive path for energizing each socket.

Another object of the present invention is to provide a fluorescent tube holder manufacturing method capable of easily manufacturing a fluorescent tube holder having a structure in which a plurality of sockets are fixed to an insulating base and the insulating base is reinforced. Yes.

The present invention relates to a fluorescent tube holder in which a plurality of conductive sockets for holding an electrode portion provided at an end of a fluorescent tube are arranged.
Synthetic size of the resin material is formed longitudinally plate-shaped insulating base provided we are a long, which is longer than the lateral dimension,
Each of the sockets is made of metal, has a base portion embedded in the insulating base, and an electrode holding piece for holding the electrode portion, and the electrode holding piece protrudes from the surface of the insulating base,
The sockets are spaced apart in the vertical direction, and the synthetic resin material forming the insulating base is interposed between the adjacent sockets, and the insulating base passes through the side of the plurality of sockets. and metal strip extending in the longitudinal direction is provided with at least a portion of said strip between said socket adjacent is embedded in the insulating base, the electrode portions of each through the strip It is characterized by being energized .

  In the fluorescent tube holder of the present invention, since the base of each socket is embedded in the insulating base made of synthetic resin, the mounting strength of each socket with respect to the insulating base can be increased. In addition, since a metal strip is embedded between the adjacent sockets, the strength of the insulating base can be increased between the adjacent sockets, and it is easy to prevent bending or bending.

It is preferable that most of the strip plate is embedded in an insulating base except for a power supply portion and a structure that is unavoidable in terms of structure. For example, it is good preferable that strip is completely embedded in the insulating base at the side of the base of the socket.

In the present invention, the band plate is electrically connected to the plurality of sockets, and the band plate serves as a current path to each of the sockets. For example, a plurality of the sockets and the band plate are formed of metal plates that are continuous with each other , or a support plate portion provided under the electrode holding piece is provided at the base portion of the socket. A capacitor element is attached between the support plate portion and the band plate, and the socket is energized through the capacitor element from the band plate .

  Each of the fluorescent tube holders can energize each socket through a strip that increases the strength of the insulating base. And since the conductive path is formed of a strip, the conductive path is hardly broken. Furthermore, since the strip plate constituting the conductive path is embedded in an insulating base made of a synthetic resin material, and the base of each socket is also embedded in the insulating base, the fluorescent tube holder is placed on the metal main body base. Even if it is fixed, it is possible to increase the withstand voltage between the base of the socket or the strip and the metal main body base.

Further, the present invention, the provided supporting plate portion and said strip is formed of the same metal plate, the electrode holding piece, the support plate portion is formed of a plate spring material different from the said metallic material Can be configured as fixed .

Since the electrode holding piece of the socket is detachably fitted with the electrode portion of the fluorescent tube, it needs to be formed of a leaf spring material having a high spring property. Since this electrode holding piece is formed independently of the support plate portion and the band plate, the support plate portion and the band plate can be formed of a material having inferior spring property than the electrode holding piece . By using a material having a high spring property only for the electrode holding piece as described above, the manufacturing cost can be reduced.

  In the present specification, “high spring property” means that when different materials are made in the same shape and the same weight is applied to the same place, the strain amount is large and the yield point is high.

  In the present invention, it is preferable that an insulating wall facing the end portion of the electrode portion of the fluorescent tube held by the socket is erected on the surface of the insulating base where the socket is disposed. .

  When the insulating wall is formed, when the insulating wall faces the side plate of the metal main body base, the dielectric strength between the end of the electrode portion of the fluorescent tube and the side plate is increased. Can do.

  Further, according to the present invention, the strip plate is not exposed on the back surface opposite to the side where the socket of the insulation base is disposed, that is, the base plate of the insulation base is not exposed on the back surface. It is preferable that it is covered with.

  As described above, at least a part of the band plate is embedded in the insulating base, but it is preferable that the entire surface of the band plate is covered with resin on the back surface of the insulating base so that the band plate is not exposed. If comprised in this way, even if the back surface of an insulation base is made to approach and fix the bottom plate of a metal main body base, the withstand voltage between a strip and a main body base can be raised.

  Further, in the present invention, when the direction in which the main body portion of the fluorescent tube held by the socket extends is an extension side, the band plate passes through the side of the extension side of each socket. Is preferred.

  In the said structure, since a strip can be arrange | positioned in the position away from the side plate formed in the metal main body base, the withstand voltage between a strip and the said side plate can be raised.

The present invention relates to a method of manufacturing a fluorescent tube holder in which a plurality of conductive sockets that hold electrode portions provided at the end of a fluorescent tube are arranged.
A plurality of metal sockets having a base portion and electrode holding pieces for holding the electrode portions are arranged at intervals in the vertical direction and pass through the sides of the sockets in the vertical direction . A metal strip that can be energized to each of the extending electrode portions is disposed,
Forming a plate-like insulating base with a length longer than a dimension in the horizontal direction with a synthetic resin material so that the base portions of the plurality of sockets are embedded and the electrode holding pieces protrude , The synthetic resin material forming the insulating base is interposed between the adjacent sockets, and at least a part of the band plate is embedded in the insulating base between the adjacent sockets. is there.

  In the above manufacturing method, since the base portion of the socket and the strip plate can be embedded in the insulating base at the same time, there is no need to position and attach the individual sockets to the substrate, and the long fluorescent tube holder can be mounted in a short time. Can be mass produced.

In this case, a plurality of said socket and said strip, and formed continuously in the same metal sheet, the electrode holding piece by bending a portion of the metal plate located between said socket adjacent formation Is possible.

  By continuously forming the socket and the strip with the same metal material, the work of embedding the base of the socket and the strip in the insulating base can be performed more easily.

Further, the present invention is formed by connecting a plurality of support plate portions and the strip plate from the same metal plate material, and cutting and separating the plurality of support plate portions from the strip plate to support each of them. A plate part is arranged at a position away from the band plate, and the electrode holding piece formed separately from the support plate part is fixed on the support plate part, and then a plurality of the support plate parts It is also possible to form the insulating base so as to be embedded.

As described above, the support plate portion and the strip plate are integrally formed, and the support plate portion and the strip plate are punched out by cutting the support plate portion from the strip plate and embedding it in the insulating base away from the strip plate. It is possible to reduce the width dimension of the metal plate at the time, eliminate waste of punching, and improve the yield.

  The fluorescent tube holder of the present invention has a structure in which a plurality of sockets are attached to a long insulating base as a whole, but since the base portion of the socket is embedded in the insulating base, the socket on the insulating base is attached. Strength can be increased. In addition, a band plate extending in the longitudinal direction is provided between adjacent sockets, and since this band plate is embedded in the insulating base, the bending rigidity of the long insulating base can be improved, It is hard to cause problems such as breaking.

  Moreover, the said strip can be used as an electricity supply path to each socket. In this case, since the strip is embedded in the insulating base made of synthetic resin, even if the main body base that supports the fluorescent tube holder is made of metal, the insulation withstand voltage between the strip and the main body base that is the current path It is possible to improve.

  According to the method for manufacturing a fluorescent tube holder of the present invention, since the base portion of the socket and the strip can be simultaneously embedded in the insulating base of the synthetic resin material, the long fluorescent tube holder can be easily mass-produced in a short time.

  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 an enlarged perspective view showing the fluorescent tube holder of the first embodiment used in the backlight device, and FIG. 4 is a metal part embedded in the insulating base of the fluorescent tube holder shown in FIG. FIG. 5A is an enlarged front view of the fluorescent tube holder shown in FIG. 3 as seen from the direction of the arrow Va, and FIG. 5B is an enlarged front view of the metal part shown in FIG. 4 as seen from the direction of the arrow Vb. It is.

  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.

  A pair of long fluorescent tube holders 10 and 10 are fixed to the inner surface 2f of the bottom plate 2a 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 placed inside an insulating base 20 made of a synthetic resin material shown in FIG.
The metal part 30 shown in FIG. 4 is embedded and configured. A socket 31 is formed by a part of the metal part 30. The socket 31 is exposed upward from 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 respective electrode portions 72 of the plurality of fluorescent tubes 70 are fitted in all the sockets 31 provided in the fluorescent tube holder 10, and in the embodiment shown in FIG. A fluorescent tube 70 is attached.

  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.

  As shown in FIG. 4, the metal part 30 embedded in the insulating base 20 is formed by punching and bending a single metal plate. The metal plate which comprises the metal part 30 is iron plates, such as a rolled steel plate which is electroconductivity and high intensity | strength. A steel plate whose surface is plated is preferably used.

  As shown in FIG. 4, the metal part 30 is provided with a first band plate 32 and a second band plate 33 that extend in parallel in the longitudinal direction of the fluorescent tube holder 10, and the first band plate 32. And the second strip 33 are connected to each other via a socket 31 formed therebetween.

  The socket 31 is formed with a connecting plate portion 34 for connecting the first band plate 32 and the second band plate 33. As shown in FIG. 4, a projecting piece 35 a extending in parallel with the first strip plate 32 and the second strip plate 33 is formed integrally with the central portion of the connecting plate portion 34. As shown in FIG. 5B, the folded portion 35b continuous to the protruding piece 35a is folded 180 degrees from the protruding piece 35a toward the back side, and the support plate portion 36 is formed integrally with the folded portion 35b. Has been.

  In addition, an electrode holding piece 37 a and an electrode holding piece 37 b that are bent from both sides of the connecting plate portion 34 and face each other are provided inside the first band plate 32. Are provided with an electrode holding piece 37c and an electrode holding piece 37d which are bent from both sides of the connecting plate portion 34 and face each other. An electrode holding portion 37 of the socket 31 is formed by the electrode holding piece 37a and the electrode holding piece 37b, and the electrode holding piece 37c and the electrode holding piece 37d. The support plate portion 36 is laid under the electrode holding portion 37.

  The support plate portion 36 and the electrode holding pieces 37 a, 37 b, 37 c, 37 d are integral with the connecting plate portion 34, and are cut out from between the first strip plate 32 and the second strip plate 33. Therefore, a notch 38 is formed between the first band plate 32 and the second band plate 33 and between the adjacent electrode holding portions 37.

A connector electrode 39 is provided at the end of the first strip 32. The connector electrode 39 is formed by bending a conductive metal plate different from the metal plate forming the first band plate 32 and the like, and is fixed to the upper surface of the first band plate 32 by welding. .

  As shown in FIG. 3, the first band plate 32 and the second band plate 33 of the metal part 30, the support plate part 36 of the socket 31, and the protruding piece 35 a and the folded part 35 b are embedded in the insulating base 20. Has been. Rectangular openings 22 are arranged on the surface 21 of the insulating base 20 at intervals in the longitudinal direction, and the electrode holding pieces 37 a, 37 b, 37 c, and 37 d constituting the respective sockets 31 are formed on the openings 22. The electrode holding pieces 37 a, 37 b, 37 c, and 37 d exist inside and protrude upward from the surface 21 of the insulating base 20.

  As shown in FIG. 3, the electrode portion 72 of the fluorescent tube 70 is sandwiched and attached between the electrode holding piece 37a and the electrode holding piece 37b and between the electrode holding piece 37c and the electrode holding piece 37d. .

  The long insulating base 20 has an opposing side edge 20a facing the short side plate 2d of the main body base 2 and an extended side edge 20b from which the fluorescent tube 70 held by the socket 31 extends. .

  The surface 21 of the insulating base 20 is integrally formed with an insulating wall 23 that rises substantially vertically on the extended side edge portion 20b side. As shown in FIG. 5A, the plurality of insulating walls 23 are opposed to the socket 31 from the side of the extended side edge portion 20b. Therefore, when the electrode part 72 of the fluorescent tube 70 is attached to the electrode holding part 37 of the socket 31, the end surface 72 a of the electrode part 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 second strip 33 is embedded over the entire length inside the insulating base 20, and the second strip 33 is connected to all sockets 31 and all sockets 31. Is passing through the side. As shown in FIG. 3, a concave portion 26 is formed in the middle of the longitudinal direction in the opposite side edge portion 20 a of the insulating base 20, and the first strip 32 is separated into two in the concave portion 26. . Each of the first strips 32 passes through the side of the socket 31 and is connected to the socket 31 on one and the other side of the recess 26.

  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.

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. Thus , the 1st strip 32 and the 2nd strip 33 function as each energization way. Moreover, since all the metal parts 30 shown in FIG. 4 can be press-molded from the same metal plate except for the connector electrodes 39, the 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.

Furthermore, as shown in FIG. 2, the opposite side edges 20a of the insulating base 20, the first strip 32 is not exposed from the end face 28. 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 It will be possible to ensure sufficient insulation.

Next, a method for manufacturing the fluorescent tube holder 10 will be described.
As shown in FIG. 4, a continuous belt-like metal plate is trimmed and bent in a pressing process to form a first belt plate 32, a second belt plate 33, and a socket 31. The socket 31 is formed by a pressing process in which a plate piece between the first band plate 32 and the second band plate 33 is cut out and bent. By this pressing process, the connecting plate portion 34, the support plate portion 36 folded back 180 degrees from the connecting plate portion 34, and electrode holding pieces 37a, 37b, 37c, which are bent from both sides of the connecting plate portion 34, 37d is formed. Further, after processing the socket 31, the connector electrode 39 is attached on the first strip plate 32.

The metal part 30 shown in FIG. 4 is sent to the insert molding process. The insert molding process, the metal portion 30 is held inside the mold cavity, the molten resin into the inner part of the cavity is injected, the resin is cooled, the insulating base 20 as shown in FIG. 3 is formed.

  In the insert molding process, the electrode holding pieces 37 a, 37 b, 37 c, and 37 d of each socket 31 are held in the recesses of the frame formed on the inner surface of the mold, and the edge of the frame supports the socket 31. The molten resin is injected into the cavity while being abutted against the plate portion 36. Therefore, the opening 22 corresponding to the shape of the frame body is formed after the mold release.

  In insert molding, the upper and lower molds are provided with support inserts that can be moved back and forth, so that the first strip 32, the second strip 33, and the support plate 36 are supported and inserted from above and below in the cavity. The molten resin is injected into the cavity in this supported state. After the molten resin is injected, before the molten resin is completely cured in the cavity, a support insert that supports the first band plate 32, the second band plate 33, and the support plate portion 36 from below. Is extracted from the cavity. As a result, the molten resin enters the portion where the support insert was present, and when the molten resin is cured, the entire area of the lower surfaces of the first band plate 32 and the second band plate 33 is covered with the synthetic resin. Therefore, the back surface 27 of the insulating base 20 has no holes or the like leading to the back surface of the first belt plate 32, the second belt plate 33, and the support plate portion 36, and the first belt plate 32 on the back surface 27 side. And the back surfaces of the second strip 33 and the support plate 36 are not exposed.

  FIG. 6 is a perspective view showing a fluorescent tube holder 110 according to the second embodiment of the present invention, and FIG. 7 is a perspective view of a metal portion 130 embedded in the insulating base 120 of the fluorescent tube holder 110. FIG. 8 is a perspective view showing a method for manufacturing the metal part 130.

Fluorescent tube holder 110 of the second embodiment, the metal portion 130 shown in FIG. 7 is embedded in the inner portion of the synthetic resin of the insulating base 120 shown in FIG. 6, the surface 121 of the insulating base 120, in the longitudinal direction Metal sockets 131 appear at intervals.

  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 is provided with a capacitor 160 interposed between the energizing portion and each socket 131. In FIGS. 6 and 7, the capacitor 160 connected to the two sockets 131 on the right side is illustrated, but actually, the capacitor 160 is connected to all the sockets 131 of the fluorescent tube holder 110.

  As shown in FIG. 7, the metal part 130 has a strip 133 that extends continuously in the longitudinal direction of the fluorescent tube holder 110, and a socket 131 that is disposed at a slight distance from the strip 133 to the right side. ing. The sockets 131 are arranged at regular intervals in the longitudinal direction of the fluorescent tube holder 110.

  The socket 131 has a support plate part 136 and an electrode holding part 137. The support plate portion 136 is formed of the same metal plate as the band plate 133. The electrode holding portion 137 is formed of a leaf spring material different from the metal plate forming the band plate 133 and the support plate portion 136. This leaf spring material is more springy than the metal plate forming the strip 133 and the support plate 136. That is, when the leaf spring material and the metal plate have the same dimensions and the same load is applied, the leaf spring material has a larger strain and a higher yield point.

The electrode holding portion 137 includes an electrode holding piece 137a and an electrode holding piece 137b that are formed by bending the leaf spring and face each other. The electrode holding portion 137 is installed on the support plate portion 136 and fixed by welding or the like. The electrode portion 172 of the fluorescent tube 170 is sandwiched between the electrode holding piece 137a and the electrode holding piece 137b.

  The metal part 130 of the fluorescent tube holder 110 according to the second embodiment is formed of a relatively expensive leaf spring material having a high spring property only for the electrode holding part 137, and the other band plate 133 and the support plate part 136 are rolled steel plates. Therefore, the entire cost of the metal part 130 can be reduced. Further, the band plate 133 can be formed of a metal material having high strength.

  As shown in FIG. 7, the strip 133 is formed with a pair of electrode portions 133a with a certain interval in the longitudinal direction, and the support plate portion 136 of the socket 131 is also paired with the electrode portions 136a, 136a is formed. As shown in FIG. 6, any one electrode portion 136 a of the support plate portion 136 and the electrode portion 133 a of the strip plate 133 facing the electrode portion 136 a appear in the opening portion 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. 7, 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.

The fluorescent tube holder 110 shown in FIG. 6 is manufactured by an insert molding process in the same manner as the fluorescent tube holder 10 shown in FIG. That is, the band plate 133 of the metal part 130 shown in FIG. 7 is embedded in the insulating base 120 made of synthetic resin shown in FIG. When the insulating base 120 is formed, the opening 123 is formed in the surface 121, the electrode part 133a and the electrode part 136a are exposed in the opening 123, and the insulating base 120 is formed. It becomes possible to mount the capacitor 160 in 123.

  In addition, the electrode holding portion 137 of each socket 131 protrudes upward from the surface 121 of the insulating base 120. On the left side of the electrode holding portion 137, a tube holding portion 124 that is integral with the insulating base 120 is formed to protrude. The tube holding portion 124 has a U-shaped holding groove. As shown in FIG. 6, 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 portion in which the linear electrode portion 172 is formed of a leaf spring material. 137 and held.

  Further, the insulating base 120 is integrally formed with a pair of sandwiching pieces 125a and 125b protruding from the upper surface thereof. One clamping piece 125a is provided outside one electrode holding piece 137a of the electrode holding part 137, and the other clamping piece 125b is provided outside the other electrode holding piece 137b. After the electrode portion 172 of the fluorescent tube 170 is sandwiched between the electrode holding piece 137a and the electrode holding piece 137b, the electrode holding pieces 137a and 137b are sandwiched between the holding piece 125a and the holding piece 125b so that the holding piece is held. The front part of 125a and the front part of the clamping piece 125b are concavo-convexly fitted. Thereby, the holding state of the electrode part 172 by the electrode holding piece 137a and the electrode holding piece 137b is stabilized.

  As shown in FIG. 6, 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. 6 also has a metal strip 133 embedded in an elongated insulating base 120. The band plate 133 is provided over almost the entire length of the insulating base 120 in the longitudinal direction, and the band plate 133 passes through the side of each socket 131 so that the band plate 133 exists between the adjacent sockets 131. ing. Therefore, the long insulating base 120 made of synthetic resin is reinforced, and the inconvenience such as breaking of the insulating base 120 during work can be prevented.

  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. Further, as shown in FIG. 7, 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.

Next, a method for manufacturing the fluorescent tube holder 110 will be described.
As shown in FIG. 8, the opening 201 and the opening 202 are alternately punched into the metal plate 200, and the support plate 136, the electrode 136a, and the electrode 133a are punched out. At this time, the support plate portion 136 is connected to the band plate 133 via the electrode portion 136a.

  After punching and forming the respective parts from the metal plate 200, the metal plate is separated at the boundary between the electrode portion 136 a and the strip plate 133, and the respective support plate portions 136 are separated from the strip plate 133. After the separation or before the separation, the electrode holding portions 137 are placed on the respective support plate portions 136 and fixed by welding or the like.

  Thereafter, the connecting piece 203 extending between the support plate portions 136 is cut and separated, and the individually separated support plate portions 136 are held together with the belt plate 133 in the cavity of the molding die, and in the cavity. By injecting the molten resin, as shown in FIG. 6, the insulating base 120 in which the band plate 133 and the support plate portion 136 are embedded is formed.

Alternatively, in a state where the support plate portion 136 is connected by the connecting piece 203, the connecting piece 203 and the band plate 133 are held in the cavity, and molten resin is injected into the cavity to form the insulating base 120. At this time, the shape of the insulating base 120 is determined so that the connecting piece 203 is exposed from the insulating base 120, and the connecting piece 203 exposed from the insulating base 120 is cut. Since the metal part is partially exposed from the insulating base 120 after cutting, it is preferable to further cover this exposed part with resin.

  Similarly to the embodiment shown in FIG. 3, the support plate that supports the band plate 133 and the respective support plate portions 136 from the lower side is extracted before the resin in the cavity is cured, The back surface of 133 and the back surface of the support plate portion 136 can be completely covered with the resin forming the insulating base 120, and the strip plate 133 and the support plate portion 136 are not exposed to the back surface 127 of the insulating base 120.

  The strip preferably extends continuously over substantially the entire length in the longitudinal direction of the fluorescent tube holder, like the second strip 33 shown in FIG. 4 or the strip 133 shown in FIG. As in the first strip 32 shown in FIG. 4, the strip extends halfway in the longitudinal direction of the fluorescent tube holder, and a plurality of strips are intermittently arranged in the fluorescent tube holder. Also good. In other words, if the band plate is arranged so as to pass through the side of the plurality of sockets, the adjacent sockets can be reinforced with the band plate within the length range in which the band plate is provided. It becomes possible.

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 FIG. 1 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, (A) is an enlarged side view of the fluorescent tube holder shown in FIG. 3 seen from the direction of the arrow Va, (B) is an enlarged side view of the metal part shown in FIG. 5 seen from the direction of the arrow Vb, 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, Explanatory drawing which shows the manufacturing method of the fluorescent tube holder of 2nd Embodiment,

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 Insulating base 21 Front surface 22 Opening 23 Insulating wall 24 Connector part 27 Back surface 30 Metal part 31 Socket 32 First strip 33 2 band plate 34 connecting portion 36 support plate portion 37 electrode holding portion 37a, 37b, 37c, 37d electrode holding piece 39 connector electrode 70 fluorescent tube 72 electrode portion 110 fluorescent tube holder 120 insulating holder 121 surface 124 tube holding portion 130 metal portion 133 Band plate 131 Socket 136 Support plate portion 137 Electrode holding portion
139 Connector electrode 170 Fluorescent tube 172 Electrode part

Claims (13)

In the fluorescent tube holder in which a plurality of conductive sockets holding the electrode portion provided at the end of the fluorescent tube are arranged,
Synthetic size of the resin material is formed longitudinally plate-shaped insulating base provided we are a long, which is longer than the lateral dimension,
Each of the sockets is made of metal, has a base portion embedded in the insulating base, and an electrode holding piece for holding the electrode portion, and the electrode holding piece protrudes from the surface of the insulating base,
The sockets are spaced apart in the vertical direction, and the synthetic resin material forming the insulating base is interposed between the adjacent sockets, and the insulating base passes through the side of the plurality of sockets. and metal strip extending in the longitudinal direction is provided with at least a portion of said strip between said socket adjacent is embedded in the insulating base, the electrode portions of each through the strip A fluorescent tube holder that is energized . 2. The fluorescent tube holder according to claim 1, wherein the strip passes through the sides of all the sockets along at least one of a pair of side edges extending in the longitudinal direction of the insulating base. The fluorescent tube holder according to claim 1 or 2 , wherein the plurality of sockets and the strip are formed of the same metal plate and are connected to each other . The fluorescent tube holder according to claim 3, wherein a part of the metal plate material positioned between the adjacent sockets is bent to form the electrode holding piece. A support plate portion laid under the electrode holding piece is provided at the base portion of the socket, and a capacitor element is attached between the support plate portion and the strip plate, from the strip plate to the The fluorescent tube holder according to claim 1 or 2, wherein the socket is energized through a capacitor element . Wherein and supporting plate portion and said strip is formed of the same metal plate, according to claim wherein said electrode holding piece, wherein the metallic material is secured to the support plate portion is formed of a plate spring material different 5. The fluorescent tube holder according to 5 . Wherein the surface of the insulating base of the socket is disposed on either of said to have no claim 1 is formed by standing retained ends opposite the insulating walls of the electrode portion of the fluorescent tube into the socket 6 The fluorescent tube holder as described. The fluorescent tube holder according to any one of claims 1 to 7 , wherein the strip is not exposed on the back surface opposite to the side where the socket of the insulating base is disposed. When the extending side direction in which the main body portion extends a fluorescent tube held in said socket, said strip is claims 1 passes through the side of the extension side of each of the socket 8 The fluorescent tube holder according to any one of the above. The fluorescent tube holder according to any one of claims 1 to 9, wherein the insulating base is formed with a mounting hole penetrating the synthetic resin material layer interposed between adjacent sockets on the front and back sides. In the method of manufacturing a fluorescent tube holder in which a plurality of conductive sockets holding electrode portions provided at the ends of the fluorescent tube are arranged,
A plurality of metal sockets having a base portion and electrode holding pieces for holding the electrode portions are arranged at intervals in the vertical direction and pass through the sides of the sockets in the vertical direction . A metal strip that can be energized to each of the extending electrode portions is disposed,
Forming a plate-like insulating base with a length longer than a dimension in the horizontal direction with a synthetic resin material so that the base portions of the plurality of sockets are embedded and the electrode holding pieces protrude , The fluorescent tube characterized in that the synthetic resin material forming the insulating base is interposed between the adjacent sockets, and at least a part of the band plate is embedded in the insulating base between the adjacent sockets. Manufacturing method of the holder. Claims a plurality of said socket and said strip, and formed continuously in the same metal plate, bent portions of the metal plate located between said adjacent sockets forming the electrode holding piece 11 The manufacturing method of the fluorescent tube holder of description. A plurality of support plate portions and the strip plate are formed from the same metal plate material, and a plurality of the support plate portions are cut and separated from the strip plate, and each support plate portion is separated from the strip plate. The electrode holding piece formed separately from the support plate portion is fixed on the support plate portion .
The method for manufacturing a fluorescent tube holder according to claim 11 , wherein the insulating base is formed so that a plurality of the support plate portions are embedded thereafter.

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