JP2013098076A - Straight tube type led lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a straight tube type LED lighting device capable of enlarging a coupling force between a base and a lighting device body and attaining labor saving of assembly work and reduction on manufacturing cost.SOLUTION: The straight tube type LED lighting device includes the straight tube type lighting device body 20, and the synthetic resin base 21 for retaining terminals 35 to be connected with LEDs 26 on a board 27 in the lighting device body by penetrating in an axial direction of the lighting device body 20. The base 21 includes a base body 33 integrally having a cylindrical part 30 fitted to an end of the lighting device body 20, and an end plate 31 for closing the pointed head part of the cylindrical part. A window hole 37 for retaining the terminal penetrating the front and the back is formed on the end plate 31, a terminal holding piece 39 for retaining the terminal is fitted into the window hole 37 unremovably, a terminal fitting groove for retaining by fitting the terminal unremovably is formed on the terminal holding piece 39, and the terminal holding piece 39 is fitted in the window hole 37 while the terminal 35 is fitted to the terminal fitting groove.

Description

  The present invention relates to a straight tube type LED illuminator in which an LED is housed in a straight tube type main body to emit light, and more specifically, a composite that holds terminals fixed at both ends of the straight tube type main body. The present invention relates to a straight tube type LED illuminator having an improved resin base.

  In recent years, a large number of straight tube LED illuminators have been developed to replace straight tube fluorescent lamps.

  As shown in FIG. 14, a conventional straight tube type LED illuminator has a cylindrical outer case 2 having a translucent portion 1 that can drop light into and out of a peripheral wall, and a heat radiating dual purpose housed in the outer case 2. An illuminator body A having a substrate holding bracket 3 and a substrate 5 supported on the substrate holding bracket 3 and mounted with a large number of LEDs 4 on its surface is provided. Synthetic resin caps 6 and 7 are fixed to both ends thereof. 15 (for example, Patent Document 1), a translucent portion 1 made of a semi-cylindrical translucent plate and a semi-cylindrical base metal fitting 3 as shown in FIG. Various types of structures have been developed, such as a substrate holding bracket 3 on which a substrate 5 having a number of LEDs 4 mounted thereon is held.

  As shown in FIGS. 16 to 18, the caps 6, 7 of these straight tube type LED illuminators include a cylindrical portion 8 fitted to the end of the illuminator main body A, and the cylindrical portion 8. It is composed of an end plate portion 9 that closes the tip portion, and a terminal is passed through and held in this end plate portion, and one of the caps 6 is connected to the power supply side pattern of the substrate 5 for power supply. In the other base 7, the terminal 10 is held by a ground terminal 11 that is connected to the ground side pattern of the substrate 5 so as to penetrate in the axial direction of the illuminator body A.

  These types of caps 6 and 7 are configured to integrally hold the terminals 10 and 11 by insert molding. The terminals 10 and 11 and the pattern of the substrate 5 are formed by connecting the ends of the conductive wire 12 to the terminals and the pattern. Soldered to.

JP 2009-266432 A

  In the conventional straight tube type LED illuminator as described above, the entire illuminator is supported by the caps at both ends, and for attaching / detaching the illuminator, the illuminator main body part is operated and operated. It is desirable that the coupling strength between the illuminator body and both holders is high. For this purpose, it is preferable in terms of structure and manufacturing that a large fitting allowance between the two is taken.

  However, since each terminal of the base is insert-molded, the conductive wire cannot be connected to the terminal in advance, and the conductive wire must be soldered after the base is molded.

  For this reason, if the cylindrical portion of the base is lengthened, it becomes difficult to solder the conductive wire 2 to the terminal, so that the length is limited, and in order to increase the coupling strength of the base against the illuminator body, It was necessary to apply another reinforcing means.

  In addition, since the LED generates a large amount of heat during light emission, it is necessary to use a resin material having high heat resistance and high flame retardance, and the base is particularly expensive.

  In view of such a conventional problem, the present invention aims to provide a straight tube type LED illuminator that can reduce the manufacturing cost, has a large coupling force between the base and the illuminator main body, and can save the assembly work. It was made.

  In order to solve the above-described conventional problems and achieve the intended object, the invention according to claim 1 is a straight tube having a substrate on which a large number of LEDs are mounted. Connected to the illuminator body having a substrate holding metal fitting for heat dissipation that holds the base, and to the power supply terminal that is fixed to the end of the illuminator body and feeds power to the LED of the board or to the ground side pattern of the board A straight tube type LED illuminator comprising a base made of a synthetic resin that has a terminal for earthing that is held in a penetrating manner in an axial direction of the illuminator main body, wherein the base is the illuminator main body And a base body portion integrally formed with an end plate portion that closes the tip end portion of the cylindrical portion, and the end plate portion includes a terminal that penetrates the front and back sides. A holding window hole is formed,

  A terminal holding piece for holding the power supply terminal or the ground terminal is fitted in the terminal holding window hole so that the power feeding terminal or the grounding terminal cannot be inserted and removed. A terminal fitting groove is formed for holding together, and the terminal holding piece is inserted into the terminal holding window hole of the end plate portion in a state where the power supply terminal or the ground terminal is fitted into the terminal fitting groove. It is made to fit in.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect, the terminal holding piece is constituted by a single molded product, and has a terminal holding groove released on a side surface of the molded product. In the terminal holding groove, the power supply terminal or the grounding terminal having a shape matching with the terminal holding groove is fitted.

  According to a third aspect of the present invention, in addition to the configuration of the first aspect, the terminal holding piece includes a pair of divided pieces divided into two, and the terminal holding groove is formed on the joint surface of the divided pieces. The terminal holding groove is fitted with the feeding terminal or the grounding terminal having a shape matching with the terminal holding groove, and the two divided pieces are joined to each other and fitted into the terminal holding window hole of the end plate portion. That is.

  According to a fourth aspect of the present invention, in addition to the structure of any one of the first to third aspects, the terminal holding piece is made of a material having higher heat resistance and flame retardancy than the base body portion. There is in being.

  In the straight tube type LED illuminator according to the present invention, the bases at both ends of the illuminator main body portion on which a substrate on which a large number of LEDs are mounted are accommodated are fitted into the end portions of the illuminator main body portion. A terminal body having a base part integrally having a cylindrical part and an end plate part closing the tip part of the cylindrical part, and a terminal holding window hole penetrating the front and back in the end plate part of the base part A terminal holding piece for holding the power supply terminal or the grounding terminal is fitted into the terminal holding window so that the power supply terminal or the grounding terminal cannot be inserted / removed. A terminal fitting groove is formed to be fitted and held so that it cannot be inserted and removed, and the terminal holding piece is used to hold the terminal plate in the end plate portion in a state where the power supply terminal or the grounding terminal is fitted in the terminal fitting groove. As a result, the power supply terminal or grounding terminal is assembled to the base. However, it is performed in a state where conductive wires for connecting to the pattern of the substrate are connected in advance, so that the soldering work in a narrow portion in the base is not required as in the prior art, and the work efficiency is reduced. Since the cylindrical portion of the base can be lengthened, the fitting allowance with the illuminator main body can be increased, and the coupling strength can be further increased.

In the present invention, the terminal holding piece is constituted by a single molded product, and has a terminal holding groove released on a side surface of the molded product, and is aligned with the terminal holding groove. By fitting the power supply terminal or grounding terminal having a shape, the number of parts can be reduced, and the manufacturing cost can be reduced.
Furthermore, in the present invention, the terminal holding piece is constituted by a pair of divided pieces divided into two, the terminal holding groove is formed on the joint surface of the divided piece, and is aligned with the terminal holding groove. By fitting the shaped power supply terminal or grounding terminal, joining the two divided pieces to each other and fitting them into the terminal holding window hole of the end plate portion, the terminal holding force against the terminal holding piece is increased. can do.

  Furthermore, in the present invention, since the terminal is held by the terminal holding piece formed separately from the base body portion, an expensive heat-resistant / flame retardant resin for dealing with the heat generation of the LED is used. It is sufficient to use it only for the terminal holding piece, and a high-quality product can be manufactured at a low cost.

It is a longitudinal cross-sectional view which shows the outline of the straight tube | pipe type LED illuminator which concerns on this invention. It is a left end view same as the above. It is a right end view same as the above. It is the sectional view on the AA line in FIG. It is a BB partial sectional view in FIG. It is the CC sectional view taken on the line in FIG. It is a disassembled perspective view of the electric power feeding terminal built-in part of the straight tube | pipe type LED illuminator shown in FIG. It is a disassembled perspective view of the above-mentioned grounding terminal built-in part. It is a disassembled perspective view which shows the outline of the modification of the ground terminal incorporation part of the straight tube | pipe type LED illuminator shown in FIG. It is an exploded perspective view showing the outline of the modification of the terminal incorporation part for electric power supply same as the above. FIG. 6 is a schematic exploded perspective view of another modification of the power feeding terminal incorporating portion. FIG. 5 is a schematic exploded perspective view of another modification of the ground terminal incorporating portion. FIG. 10 is a schematic exploded perspective view of still another modified example of the ground terminal incorporating portion. It is sectional drawing which shows the illuminator main-body part of the conventional straight tube | pipe type LED illuminator. It is sectional drawing which shows the other example of the illuminator main-body part of the conventional straight tube | pipe type LED illuminator. It is a longitudinal cross-sectional view which shows the outline of the whole of the conventional straight tube | pipe type LED illuminator shown in FIG. It is a left end view of the conventional straight tube type LED illuminator shown in FIG. FIG.

  Next, an embodiment of a straight tube type LED illuminator according to the present invention will be described based on an embodiment shown in the drawings.

    1 to 8 show a first embodiment of the present invention. In the figure, reference numeral 20 denotes an illuminator body, 21 denotes a power supply side base fixed to one end of the illuminator body, and 22 denotes a ground side base fixed to the other end.

  The illuminator main body 20 includes a cylindrical outer case 24 having a translucent portion 23 that can drop light into and out of a peripheral wall, a substrate holding metal fitting 25 for heat dissipation housed in the outer case 24, and a substrate holding metal fitting 25. And a substrate 27 having a large number of LEDs 26 mounted on the surface thereof.

  Both the caps 21 and 22 are made of a synthetic resin material, and are integrally molded into a shape in which the end of the cylindrical portion 30 fitted to the end of the illuminator main body 20 is closed by the end plate portion 31. The main body 33 is composed of a terminal holding piece 39 or 48 fitted into a window hole formed in the end plate 31 of the base body 33.

  Each of the side caps 21 and 22 is fixed to the end of the illuminator body 20, and the power feeding side cap 21 has power feeding terminals 35 and 35 that are connected to a power feeding side pattern (not shown) of the substrate 27. On the other ground side base 22, ground terminals 36 to be connected to the ground side pattern (not shown) of the substrate 27 are respectively held penetrating in the axial direction of the illuminator body 20.

  A rectangular window hole 37 is formed in the end plate portion 31 of the power supply side base 21, and the peripheral portion on the inner surface side of the end plate portion of the window hole 37 has an arrangement in which the inner surface of the window hole is extended. A frame-shaped cylindrical portion 37a is integrally formed. An inward projecting piece 38 is integrally formed at the end of the window hole 37 on the inner side of the end plate.

In the window hole 37, a terminal holding piece 39 having a matching shape is fitted, and the peripheral edge portion of the end face comes into contact with the protruding piece 38 so as not to be pushed further. A retaining claw 40 is integrally formed outwardly on the holding piece 39 and cannot be pulled out by engaging with an end plate inner surface side edge portion 37b of the cylindrical portion 37a.
The terminal holding piece 39 holds a pair of power supply terminals 35 and 35 in a state of passing through the terminal holding piece 39.

  As shown in FIG. 7, the power supply terminal 35 is formed by bending a band-shaped metal plate-like material, and a hand-shaped bent portion 35a is formed in the middle portion in the length direction. The piece 39 is formed with a terminal fitting groove 41 opened on one side surface thereof, and the terminal fitting groove 41 has a shape in which the hand-shaped bent portion 35a of the terminal holding piece 39 is fitted and fitted. It is shaped like a cocoon.

  The terminal holding piece 39 is fitted into the window hole 37 with the feeding terminals 35 and 35 fitted in the pair of terminal fitting grooves 41 and 41, respectively. A pair of terminal tip portions 35 b and 35 b are projected from the plate portion 31, and the conductive wire connection ends 35 c and 35 c are projected from the inner surface side terminal of the end plate portion 31.

  When assembling the power feeding base 21, first, one end of each of the conductive wires 43, 43 for connecting the conductive wire connection ends 35 c, 35 c of the power feeding terminals 35, 35 to the pattern of the substrate 27 is soldered or the like. Connect according to the method.

  In a state where the power supply terminals 35 and 35 with conductive wires are fitted into the terminal fitting grooves 41 and 41 of the terminal holding piece 39, the terminal holding piece 39 is inserted into the window hole 37 from the outside of the end plate portion 31. Press fit into. As a result, the end face of the terminal holding piece 39 comes into contact with the projecting piece 38 at the innermost part of the window hole 37, and the retaining claw 40 is engaged with the inner edge 37 b of the end plate part of the cylindrical part 37 a of the window hole 37. As a result, the conductive wires 43 and 43 are led out of the cylindrical portion 30 of the power supply side base 21.

  A square-shaped window hole 44 is formed in the end plate portion 31 of the ground side base 22, and a cylindrical portion 44 a arranged so as to extend the inner surface is formed on the peripheral edge portion on the inner side of the end plate portion of the window hole 44. It is integrally formed. An inward projecting piece 46 is integrally formed at the inner end of the end portion of the window hole 44.

In the window hole 44, a rectangular terminal holding piece 48 that matches this is fitted, and the peripheral edge portion of the end face comes into contact with the protruding piece 46 so that it cannot be pushed any further. The terminal holding piece 48 is integrally formed with a retaining claw 49 that is outwardly integrated. When the terminal retaining piece 48 engages with the edge 44b of the end portion of the cylindrical portion 44a of the window hole 44, it cannot be removed. Yes.
The terminal holding piece 48 holds a single grounding terminal 36 in the center of the terminal holding piece 48 so as to penetrate the terminal holding piece 48.

  As shown in FIG. 8, the grounding terminal 36 is formed with a rod-shaped metal material, and a flange-shaped protrusion 36 a having a flange shape is formed at an intermediate portion in the length direction.

  The terminal holding piece 48 is constituted by a pair of divided pieces 48a and 48a obtained by dividing the terminal holding piece 48 into two vertically, and the groove 50 having a shape in which the grounding terminal 36 is fitted and fitted to the joint surface of both divided pieces. 50 is formed, and the grounding terminal 36 is fitted into this and the divided pieces 48a, 48a are joined to each other so that the grounding terminal 36 is inserted in the center of the terminal holding piece 48, and this terminal By fitting the holding piece 48 into the window hole 44, the grounding terminal 36 is assembled in the center of the end plate portion 31, and the grounding terminal 36 terminal is outside the end plate portion 31 of the ground side base 22. A front end portion 36 b is projected, and a conductive wire connecting end portion 36 c is projected from the inner surface side terminal of the end plate portion 31.

  When assembling, first, one end of the conductive wire 43 for connecting to the pattern of the substrate 37 is connected to the conductive wire connecting end portion 36c of each grounding terminal 36 by soldering or other methods.

  In a state where the grounding terminal 36 with the conductive wire is incorporated in the terminal holding piece 48, the terminal holding piece 48 is fitted into the window hole 44 by being press-fitted from the outside of the end plate portion 31. As a result, the end face of the terminal holding piece 48 comes into contact with the projecting piece 46 at the innermost part of the window hole 44, and the retaining pawl 49 is engaged with the inner edge 44 b of the end plate part of the cylindrical part 44 a of the window hole 44. As a result, the conductor wire 43 is led out of the cylindrical portion 30 of the ground side base 22.

  As an example, the fixing of the power feeding bases 21 and 22 to the illuminator main body 20 is a groove-shaped recessed portion 52 having a U-shaped cross section toward the outer periphery of the cylindrical portion 30 of the both bases in the axial direction. (Shown in FIG. 2 and FIG. 3), one end of the recessed portion 52 is released from the surface of the end plate portion 31, and the other end is formed as a closed end portion 52a. The insertion hole 53 is formed.

  Then, the conductive wire 43 led out from each of the power supply side caps 21 and 22 is connected to a predetermined portion of the pattern of the substrate 27 in the illuminator body 20 by soldering or using a connector.

  Thereafter, with the outer case 24 of the illuminator body 20 fitted in the cylindrical portion 30 of the base, a set screw 54 is inserted through the set screw insertion hole 53 to hold the substrate in the illuminator body 20. It fixes by screwing in the end surface of the metal fitting 25.

  In addition, the coupling | bonding of the electric power feeding side caps 21 and 22 and the illuminator main-body part 20 can take various methods corresponding to the structure of an illuminator main-body part.

  In addition to the above, in the ground side base 22 for the ground terminal, a terminal fitting groove 56 is formed on the side surface of one rectangular terminal holding piece 55 as shown in FIG. The terminal 57 may be fitted and the terminal holding piece 55 may be fitted into the window hole 44 of the end plate portion 31.

  Further, even in the power supply side base 21 for the power supply terminal, as shown in FIG. 10, the terminal holding piece 60 is constituted by the divided pieces 60a and 60a which are divided into two parts, and the terminal fitting groove is formed on the joint surface between them. 61 is formed, power supply terminals 35 and 35 similar to those described above are fitted thereto, and both divided pieces 60a and 60a are joined to hold power supply terminals 35 and 35, which are connected to the end plate portion. You may make it fit in the 31 window holes 37. FIG.

  In this case, rod-shaped power supply terminals 62 and 62 may be used as shown in FIG. 11, and a concave groove 63 that matches the rod-shaped power supply terminal is formed on the joining surface of both split pieces 60a and 60a. In addition, the power feeding terminals 62 and 62 may be held by the power feeding terminals 62 and 62.

  Further, each terminal holding piece may be circular as shown in FIG. 12, and may be configured to have divided pieces 64 and 64 that are divided into half. In this case, the connection with the base body portion is performed by fitting the terminal holding piece 66 in which the circular window hole 65 is formed in a circular shape and the split pieces 64 and 64 are joined to the window hole 65 by screwing. Also good.

  In addition to these, various methods such as bonding with an elastic adhesive, ultrasonic welding, spin-eld welding, and the like can be used to bond the base body portion and the terminal holding piece.

  The base body and the terminal holding piece are preferably both made of a heat-resistant and flame-retardant synthetic resin material, but the terminal holding piece is made more heat-resistant and flame-retardant than the synthetic resin material of the base body. An excellent material can be used, whereby the amount of expensive heat-resistant resin used can be reduced.

20 Illuminator Main Body 21 Power Supply Side Base 22 Ground Side Base 23 Translucent Part 24 External Case 25 Board Holding Metal 26 LED
27 Substrate 30 Cylindrical portion 31 End plate portion 33 Base body portion 35 Power supply terminal 35a Bending portion 35b Terminal tip portion 35c Conductive line connecting end portion 36 Ground terminal 37 Window hole 37a Cylindrical portion 37b End plate inner side edge 38 Overhanging piece 39 Terminal holding piece 40 Retaining claw 41 Terminal fitting groove 43 Conductive wire 44 Window hole 44a Cylindrical part 46 Overhanging piece 48 Terminal holding piece 48a Dividing piece 49 Retaining claw 50 Recessed groove 52 Recessed part 52a Closed End 53 Set screw insertion hole 54 Set screw 55 Terminal holding piece 56 Terminal fitting groove 57 Ground terminal 60 Terminal holding piece 60a Dividing piece 61 Terminal fitting groove 62 Feeding terminal 63 Concave groove 64 Dividing piece 65 Window hole 66 Terminal Holding piece

Claims (4)

It has a straight tube shape and contains a board with a large number of LEDs mounted on its surface. It also has an illuminator main body having a heat-sink-use substrate holding bracket that holds the base, and is fixed to the end of the illuminator main body. And a base made of a synthetic resin in which a power supply terminal for supplying power to the LED of the substrate or a ground terminal to be connected to the ground side pattern of the substrate is held penetrating in the axial direction of the illuminator body. In a straight tube type LED illuminator comprising:
The base comprises a base part integrally having a cylindrical part fitted to an end part of the illuminator main part, and an end plate part closing the tip part of the cylindrical part,
In the end plate portion, a terminal holding window hole penetrating the front and back is formed,
In the terminal holding window hole, a terminal holding piece for holding the power supply terminal or the ground terminal is fitted so as not to be inserted and removed,
The terminal holding piece is formed with a terminal fitting groove for fitting and holding the power feeding terminal or the grounding terminal so as not to be inserted and removed,
A straight tube type characterized in that a terminal holding piece is fitted into a terminal holding window hole of the end plate portion in a state where the power supply terminal or a ground terminal is fitted in the terminal fitting groove. LED illuminator   The terminal holding piece is constituted by a single molded product, and has a terminal holding groove released on a side surface of the molded product, and the power supply terminal or ground having a shape matching the terminal holding groove. The straight tube | pipe type LED illuminator of Claim 1 which made the terminal for fitting fit.   The terminal holding piece is constituted by a pair of divided pieces divided into two, the terminal holding groove is formed in the joint surface of the divided piece, and the power supply terminal or ground having a shape matching the terminal holding groove is formed. The straight tube type LED illuminator according to claim 1, wherein a terminal for use is fitted, and both divided pieces are joined to each other and fitted in a terminal holding window hole of the end plate portion. The straight tube type LED illuminator according to any one of claims 1 to 3, wherein the terminal holding piece is formed of a material having higher heat resistance than the base body portion.

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