JP2012033321A - Led lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology in a lighting system installed in nearly horizontal state on a ceiling or the like of the room in which a problem is solved that in the lighting system having a long LED substrate mounted in a long tube, the longer LED substrate is required the longer the tube becomes, thus bringing up an undesirable cost increase to manufacture such a long LED substrate, and in which the jointing strength of mutual substrates is increased.SOLUTION: An LED substrate of a long band-plate shape is constructed by jointing a plurality of unit substrates. An entrance opening communicating to a jointing end part is provided with a jointing hole narrower than the depth section in one of the unit substrate of the mutual unit substrates to be jointed, and the other unit substrate is provided with a jointing projection to be pressure insertion-engaged with the jointing hole. Both the unit substrates are jointed by insertion-engagement of the jointing hole and the jointing projection and, in that jointing state, electric circuit connections of both the unit substrates are made.

Description

The present invention relates to an LED illuminating device in which a long strip plate-like substrate on which a large number of LEDs (light emitting diodes) are arranged is housed in a long tubular body, and in particular, by connecting a plurality of unit substrates, The present invention relates to a technique for connecting unit substrates in the case of configuring a substrate.

A long support plate 3 (L) in which a large number of LEDs 9 are arranged in a cylindrical pipe 2 made of transparent plastic.
ED board) is mounted horizontally, two terminals 4 and 4 are connected to both ends of the support plate 3, respectively, and terminals 4 and 4 project from base caps 5 and 5 that close both ends of the cylindrical pipe 2. There is a thing (refer patent document 1).

JP 2001-351402 A

Since the thing of patent document 1 is a thing in which a long LED board was attached in the cylindrical pipe, the longer the cylindrical pipe, the longer the LED board is required. Producing it leads to an increase in cost and is not preferable.

As the prior art LED lighting device 1 before reaching the present invention, there are those shown in FIGS. This is because the long LED substrate 3 on which a large number of white LEDs (light emitting diodes) 2 are arranged is at least partially translucent in the longitudinal direction in the straight tubular body 4 (long axis direction of the tubular body 4). An end cap 6 having a terminal portion 5 fitted and attached to a socket portion (not shown) of a straight-tube fluorescent lamp lighting device or the like that is housed so as to extend in the conventional manner is used for the tube body 4. Predetermined power is supplied to the LED 2 via the lead wires 7 attached to the left and right ends and soldered to the terminal portion 5.
May emit light.

In this case, the LED substrate 3 employs a method in which the long strip plate-like LED substrate 3 is formed by joining SS of a plurality of unit substrates A, B, and C. In this case, the unit substrates A, B, and C are used. While maintaining the mutual junction SS and connecting the unit substrates A, B, and C with the jumper wire J to connect the electrical circuits of the LED 2 of the unit substrates A, B, and C, the jumper wire J portion is A method of securing the electrical connection between the unit substrates A, B, and C by soldering H has been adopted.

When connected by this method, when the united board A, B, and C are pulled together when the united LED board 3 is accommodated in the tube 4, the junction SS part is separated and the jumper wire J
If the soldering H part of the solder is peeled off or cut off, an electrical trouble will occur.

Further, when soldering the jumper wire J across the electric circuit between the unit substrates A, B, and C, the jumper wire J is attached while pressing the unit substrates A, B, and C in the direction of the junction SS, Since it is necessary to perform the soldering H work in a state, it is a considerably troublesome work.

In view of such a point, the present invention provides a technique in which the state of the junction SS between the unit substrates A, B, and C is maintained and an electric circuit between the unit substrates A, B, and C is secured. It is.

In addition, even when the connection by the jumper wire J that has been conventionally used is stopped, the unit substrate A,
The present invention provides a technique in which the bonding state between B and C is maintained and an electric circuit between unit substrates A, B, and C is secured.

In the first aspect of the present invention, a long LED board in which a large number of LEDs are arranged on the illumination side surface is accommodated so as to extend in the longitudinal direction in the synthetic resin tube, and an end having a terminal portion that is fitted and attached to a socket portion In the LED lighting device in which the part cap is attached to the left and right ends of the tube body, and power is supplied to the LED through the terminal part,
The LED substrate constitutes a long strip plate-like LED substrate by joining the joining end portions of a plurality of unit substrates, and one unit substrate of the unit substrates to be joined has an entrance opening communicating with the joining end portion. Is provided with a joining hole narrower than the inner part, and the other unit substrate is provided with a joining projection that fits into the joining hole, and the unit substrates are joined to each other by fitting the joining hole and the joining projection. The unit substrates are connected to each other in an electric circuit in a bonded state.

According to a second aspect of the present invention, in the first aspect, the conductive foil forming the wiring pattern is formed up to the surface of the joining end portion on each unit substrate, and the solder at the conductive foil portion formed up to the joining end portion surface As a result, the unit substrates are electrically connected to each other.

According to the first aspect of the present invention, the unit substrates can be maintained in a bonded state that is difficult to separate by fitting the bonding holes and the bonding protrusions. There is no fear that the soldering part will be peeled off or cut off.
Maintenance of the electric circuit between the unit substrates is improved.

In the second invention, in addition to the effects of the first invention, the electric circuit connection between the unit substrates can be directly soldered at the conductive foil portion formed up to the surface of the joining end. Therefore, an effect of increasing the strength of the joint portion between the unit substrates can be obtained. This also makes it possible to eliminate the previously used jumper wires.

It is state explanatory drawing of the board | substrate accommodated in the tubular body of the LED lighting apparatus which concerns on this invention. It is a state explanatory drawing of the LED board accommodated in the tubular body seen from the Y direction of FIG. It is explanatory drawing in case the relationship between the joining hole and joining protrusion as a connection means between unit substrates which concerns on this invention is a trapezoid wedge. It is explanatory drawing in case the relationship between the joining hole as a connection means between unit substrates which concerns on this invention, and a joining protrusion is a round wedge. It is sectional drawing which shows the relationship between the edge part cap and tube of the LED lighting apparatus which concerns on this invention. It is AA sectional drawing of FIG. It is a disassembled perspective view which shows the relationship between the edge part cap, LED board, and tubular body of the LED lighting apparatus which concerns on this invention. It is explanatory drawing which shows the state which connected the unit board | substrate which concerns on a prior art, and comprised the LED board. It is sectional drawing of the connection location of the unit substrates of FIG.

The present invention includes an end portion having a terminal portion that is accommodated so that a long LED substrate in which a large number of LEDs are arranged on an illumination side surface extends in a longitudinal direction in a synthetic resin tubular body and is fitted to a socket portion. In the LED lighting device in which caps are attached to both left and right ends of the tube body, and power is supplied to the LED through the terminal portion,
The LED substrate constitutes a long strip plate-like LED substrate by joining the joining end portions of a plurality of unit substrates, and one unit substrate of the unit substrates to be joined has an entrance opening communicating with the joining end portion. Is provided with a joining hole narrower than the inner part, and the other unit substrate is provided with a joining projection that fits into the joining hole, and the unit substrates are joined to each other by fitting the joining hole and the joining projection. The unit substrates are connected to each other in an electric circuit in a bonded state, and examples of the present invention will be described below.

The LED lighting device 1 according to the present invention is attached to a socket (not shown) in place of a straight tube type fluorescent lamp of a conventional straight tube type fluorescent lamp lighting device, but is not limited thereto. It becomes an illuminating device applicable also to a lighting fixture provided with the socket for exclusive use which attaches LED lighting device 1 concerning the present invention.

Below, LED lighting device 1 concerning the present invention is explained based on a figure. In the LED lighting device 1, a long LED substrate 3 on which a large number of white LEDs (light emitting diodes) 2 are arranged is at least partially translucent in a longitudinal direction within a straight tube 4 (the length of the tube 4). Stored in the axial direction)
End caps 6 having terminal portions 5 fitted and attached to socket portions (not shown) of a straight tube type fluorescent lamp lighting device or the like that are conventionally used are attached to the left and right ends of the tube body 4, and the terminal portions A predetermined power is supplied to the LED 2 through the lead wire 7 soldered to the LED 5, and the LED 2 emits light.

The LED lighting device 1 is mounted on a socket part (not shown) such as a straight tube fluorescent lamp lighting device arranged on the ceiling of a room, for example, and the tube body 4 is supported in a substantially horizontal state. In this state, the illumination side surface 3P is directed downward and illuminates the lower part.

In the tube 4, an LED drive circuit board 8 is housed in addition to the LED board 3. LED
The substrate 3 is made of a flat synthetic resin, and a number of LEDs 2 are arranged so that one side surface (the lower side surface in FIG. 2) becomes the illumination side surface 3P, and the other side surface opposite to the illumination side surface 3P ( On the back surface, a flat LED driving circuit board 8 to which an electric circuit element for supplying power to the LED 2 is attached is attached to the back side (upper side in FIG. 2) of the LED board 3 in parallel with the LED board 3. . In the embodiment, as shown in FIG. 1, the LED illumination device 1 is attached to a ceiling portion of a room and illuminates the lower part, and is arranged so that the lower side surface of the LED substrate 3 becomes the illumination side surface 3P. It is a configuration.

On the illumination side surface 3P of the LED substrate 3, a large number of LEDs 2 electrically connected in series in a row are arranged in a straight line and arranged in a plurality of rows. The total shown is 306
The LEDs 2 are arranged in three rows with a predetermined interval. LED lighting device 1 shown in the embodiment
The length L is approximately 1200 mm, and forming the LED substrate 3 having a length corresponding to this length with a single substrate increases the cost. Therefore, in the embodiment, three unit substrates are used. A, B,
C is connected in series to constitute the LED substrate 3. Therefore, each of the unit boards A, B, and C is in a state where 34 LEDs 2 in one row are arranged in three rows at a predetermined interval, and the LEDs 2 in each row of the unit boards A, B, and C are electrically 306 LEDs connected in series
2 has a three-row configuration.

As shown in FIG. 7, the tube 4 shown in FIG.
The upper region 4U is opaque from the position PL corresponding to the D substrate 3, and the lower region 4D from the position PL substantially corresponding to the LED substrate 3 is translucent or translucent (including colored or milky white). Thus, it is a cylindrical shape formed by extrusion molding or pultrusion molding of a synthetic resin material, or a cylindrical shape close thereto. Since the irradiation angle by the light emission of the LED 2 attached to the flat illumination side surface 3P is approximately 120 degrees, L in each row at both ends of the three rows attached to the flat illumination side surface 3P.
Considering the irradiation angle of the light of the ED 2 and the reflected light from the tube 4, the tube 4 is substantially the LED substrate 3.
The lower region 4D at a position corresponding to the above may be configured to be translucent. If the upper region 4U is opaque, the LED driving circuit board 8 above the LED board 3 and the electric circuit elements attached thereto are invisible from the outside, which is a preferable form in appearance.

The terminal portions 5 of the end caps 6 attached to both ends of the tube body 4 are each provided with two pins. This is a socket portion of a conventionally used straight tube fluorescent lamp illumination device ( This is because it is configured to be fitted and attached to a not-shown).

As shown in FIG. 6, the end cap 6 is formed in a cylindrical shape with a synthetic resin material which is an electrical insulating material in order to match the cylindrical tube body 4. The terminal portion 5 is connected to one end of the lead wire 7 provided with the terminal-side plug 11B by soldering in a state where the terminal portion 5 is attached to the terminal support member 14 made of an electrical insulating material. As shown in FIG. 6, the terminal support member 14 is attached to the end cap 6 with the extension of the terminal support member 14 in contact with the annular mounting portion 6 </ b> A at the outer end of the end cap 6. A cup-shaped metal appearance member 14A integrally combined with 14 is bonded to the outer surface of the annular mounting portion 6A.

LED 2 is supplied by commercial AC power AC supplied to terminal portions 5 at both ends of LED lighting device 1.
LED with an electric circuit element that supplies power to LED 2 in order to emit light
A driving circuit board 8 is provided. A board-side plug 11A connected to the terminal-side plug 11B on the lead wire 7 side connected to the left and right terminal portions 5 is attached to the LED board 3 and the LED drive circuit board 8. With these board-side plug 11A and terminal-side plug 11B connected, commercial AC power AC is supplied from the left and right terminal portions 5 to the electric circuit elements of the LED drive circuit board 8 via the lead wires 7. It is wiring. As this electric circuit element,
The LED drive circuit board 8 includes an AC / DC conversion circuit including a rectification circuit for rectifying the commercial AC power AC supplied from the left and right terminal portions 5 via the lead wires 7 to obtain a predetermined DC voltage. Unit 9 and a voltage control unit 10 that supplies the direct current DC supplied from the AC / DC conversion circuit unit 9 to the LED 2 as a predetermined voltage.

As shown in FIGS. 5 to 7, in order to support the LED substrate 3 in the cylindrical tube body 4, there is a length direction of the tube body 4 (tube 4) at a position facing the inner surface of the cylindrical tube body 4. A pair of opposed support grooves 4 </ b> A extending in the axial direction) is formed simultaneously with the formation of the tube body 4. The pair of support grooves 4A is formed between a pair of opposing ribs 4B and 4B extending in the length direction of the tube body 4 (the axial direction of the tube 4), and the interval between the pair of ribs 4B and 4B is as follows. The tube body 4 is formed over the entire length of the tube body 4 at the same time as the tube body 4 is formed with a space slightly larger than the thickness of the LED substrate 3. The LED substrate 3 is inserted into and supported by the pair of support grooves 4A from the opening end of the tube body 4.

As shown in FIG. 7, the LED board 3 with the LED drive circuit board 8 attached to the back side has a pair of ends 3 </ b> A along the longitudinal direction of the LED board 3 from one end opening of the pipe body 4. The LED substrate 3 is accommodated in the tube body 4 by slidingly inserted into the support groove 4A. In this stored state, the annular mounting portions 6B of the end cap 6 are inserted into the left and right open ends of the tube body 4, and the left and right open end portions of the tube body 4 are in contact with the annular flange 6C of the end cap 6. An end cap 6 is attached to the position. In order to achieve this attachment, the annular attachment portion 6B of the end cap 6 is formed with a notch 6D into which the pair of ribs 4B and 4B are inserted.

When the end caps 6 are attached to the left and right opening ends of the tube body 4, the LED substrate 3 inserted and supported in the pair of support grooves 4 </ b> A in the tube body 4 is placed in a predetermined position in the tube body 4 and positioned. For this purpose, a substrate stopper 6E is formed on the end cap 6 at the center of the notch 6D. Thus, if the LED substrate 3 is displaced in either the left or right direction of the tube body 4 by attaching the end caps 6 to the left and right opening ends of the tube body 4, as shown in FIG. The end 3 </ b> B in the longitudinal direction of the substrate 3 contacts the substrate stopper 6 </ b> E, and the LED substrate 3 is positioned at the left and right central positions of the tube body 4. This positioning is effective so that the light emission of the LED 2 can be obtained uniformly from the entire length of the tube body 4.

As shown in FIG. 5 and FIG. 6, inside the end cap 6, the inner region surrounded by the annular mounting portion 6 </ b> B is bent in the middle of the lead wire 7 so as not to protrude from the annular mounting portion 6 </ b> B. An engaging portion 15 for engaging is provided, and by this bending engagement, acting force such as pulling or bending of the lead wire 7 applied to the soldered portion between the lead wire 7 and the terminal portion 5 is absorbed.

The locking portion 15 includes a pair of first locking portions 15A and 15A facing each other, a second locking portion 15B,
15B. The first locking portions 15A and 15A are formed at the end portions of the holes 16A formed in the inner and outer partition walls 16 in the end cap 6, and the second locking portions 15 so as to face the holes 16A.
B and 15B are formed. Therefore, the two lead wires 7 extending from the terminal portion 5 are bent so as to pass through the inner and outer partition walls 16 in the vicinity of the holes 16A and to be locked to the second locking portions 15B and 15B, respectively. It extends to the plug 11B. In this state, the two lead wires 7 are locked to the first locking portions 15A and 15A, respectively, and are partially locked into the holes 16A and locked to the second locking portions 15B and 15B. Become. The first locking portions 15A, 15A and the second locking portion 15
B and 15B can be locked by inserting and locking the lead wire 7 while bending the lead wire 7 from between the second locking portions 15B and 15B.

The lead wire 7 is inserted and locked to the first locking portions 15A and 15A and the second locking portions 15B and 15B while bending the lead wire 7 between the second locking portions 15B and 15B as shown in FIG. By doing so, locking of the lead wire 7 can be achieved.

The long LED substrate 3 configured as described above is supported by a pair of support grooves 4A in the long tubular body 4, but the longer the tubular body 4, the longer the long LED substrate 3 becomes. Therefore, it is not preferable to produce such a long LED substrate 3 because it leads to an increase in cost. In order to solve this, in the present invention, a long strip plate-like LED substrate 3 is configured by joining a plurality of unit substrates. Hereinafter, a specific configuration of the embodiment in which the unit substrate is configured by three pieces of A, B, and C will be described.

The LED substrate 3 is a long strip plate-like LED substrate 3 by joining a plurality of unit substrates A, B, and C.
The unit substrate to be bonded (for example, A and B) has a bonding hole G in which one of the unit substrates (for example, A) is connected to the bonding end portion and the entrance opening E is narrower than the depth F. The other unit substrate (for example, B) is provided with a joining projection M that is press-fitted into the joining hole G. FIG. 3 shows a trapezoidal wedge shape and FIG. 4 shows a round wedge shape as a joint hole G and a joint projection M as connection means between unit substrates (for example, A and B). Is shown.

In the state formed in this way, the bonding is performed in a state in which the bonding protrusion M of the other unit substrate (for example, B) is made to overlap the bonding hole G of the other unit substrate (for example, A) from above. The protrusion M is pressed into the joint hole G with a finger. As a result, the bonding protrusion M and the bonding hole G are fitted, and the bonding end surface TM of one unit substrate (for example, A) and the bonding end surface TM of the other unit substrate (for example, B) are brought into contact with each other. Unit substrate (for example, A) and the other unit substrate (for example, B)
) Are joined.

In this bonded state, the conductive foil DH of the wiring pattern of the LED 2 in each column of one unit substrate (for example, A) and the conductive foil DH of the wiring pattern of the LED 2 in each column of the other unit substrate (for example, B) are Electrically connected. This electrical connection can be made by jumper wire J and soldering H as shown in FIG. 9, but since the fitting between the joint protrusion M and the joint hole G is ensured, the jumper wire J is abolished. You can also The conductive foil DH of the example is formed of a copper foil.

In the present invention, a configuration is proposed in which sufficient electrical connection can be maintained even if this jumper wire J is omitted at all by the configuration in which the electrical connection of the junctions between the unit substrates A, B, and C is sufficient. Yes. This configuration will be described below.

As shown in FIGS. 3 and 4, the conductive foil DH of the wiring pattern of the LEDs 2 in each column of one unit substrate (for example, A) forms a joint end portion DH1 extending to the joint end. Further, the conductive foil DH of the wiring pattern of the LED 2 in each column of the other unit substrate (for example, B) forms a junction end portion DH2 extending to the junction end as shown in FIGS. . This conductive foil D
Both joint end portions DH1 and DH2 of H are LEDs on which a conductive foil DH having a wiring pattern is formed.
Only the back side of the substrate 3 (the side opposite to the illumination side surface 3P) may be used. In this case, the conductive foil DH that is in the proximity or contact state in a state in which the bonding protrusion M and the bonding hole G are fitted and one unit substrate (for example, A) and the other unit substrate (for example, B) are bonded to each other. The joining end portions DH1 and DH2 are connected by soldering H as shown in FIG.

In the present invention, as a means for increasing the bonding strength between one unit substrate (for example, A) and the other unit substrate (for example, B), as shown in FIG. The end portion DH1 of the conductive foil DH is formed so as to cover the joint end surface TM so that a part of the unit substrate (for example, A) is joined to the illumination side surface 3P from the joint end surface TM. This is a state in which a depression K is formed in a portion covering the surface TM. Also, the conductive foil DH of the other unit substrate (for example, B)
The end portion DH2 of the other unit substrate (for example, B) is formed so as to cover the joint end surface TM so that a part of the end surface DH2 covers the illumination side surface 3P from the joint end surface TM of the other unit substrate (for example, B). This is a state in which the depression K is formed in the covered portion. In such a form, a through hole in which a part of the conductive foil DH exists is formed by the depression K in the joint end surface TM between one unit substrate (for example, A) and the other unit substrate (for example, B). It becomes.

With this configuration, the conductive foil DH that is in the proximity or contact state in a state in which the joining protrusion M and the joining hole G are fitted and one unit substrate (for example, A) and the other unit substrate (for example, B) are joined.
The joining end portions DH1 and DH2 are soldered H. At this time, one unit substrate (for example, A)
The solder H flows into the depression K on the joining end surface TM of the other unit substrate (for example, B), and the soldering H is performed in the depression K, so that the joining end portions DH1 and DH2 are spread over a wide range by the solder H. Be joined. For this reason, one unit substrate (for example, A) and the other unit substrate (for example, B)
) Increases the strength of the joined portion, and the reinforcing effect of the joined portion can be obtained. With this configuration, even if the jumper wire J is abolished, the electrical connection can be sufficiently maintained.

In the above description, the unit substrate (for example, A and B) is shown in FIG. 3 and FIG. 4, but the entrance opening E is narrower than the depth F in one unit substrate (for example, A). With G,
If it is based on the structure provided with the joint protrusion M press-fitted into the joint hole G on the other unit substrate (for example, B), it may be in another form regardless of the form shown in FIGS. it can. Also,
The bonding form between the unit substrates B and C is the same as described above.

The LED lighting device 1 according to the present invention is not limited to the configuration of the straight tube LED lighting device 1 shown in the above embodiment, but includes LED lighting devices having various configurations within the technical scope of the present invention.

1 ... LED lighting device 2 ... LED
3... LED board 3 A... Both end portions along the longitudinal direction of LED substrate 3 3 B... Longitudinal end portion 3 P of LED substrate 3. Tube 4A ... groove 4B ... rib 5 ... terminal 6 ... end cap 6A ... annular mounting 6B ... annular mounting 6C ...・ ・ Annular flange 6D ・ ・ ・ ・ Notch 6E ・ ・ ・ ・ Stopper 7 ・ ・ ・ Lead wire 8 ・ ・ ・ LED drive circuit board 9 ・ ・ ・ AC / DC conversion circuit 10 ..... Voltage control part 11A ... Board side plug 11B ... Terminal side plug 14 ... Terminal support member 14A ... Metal appearance member 15 ... Locking part 15A ... No. 1 latching part 15B ... 2nd latching part 16 ... partition 16A ... hole A, B, C ... single Board E ... Entrance opening F ... Back G ... Joint hole H ... Solder or soldering J ... Jumper wire M ... Join Protrusion DH ··· Conductive foil DH1 and DH2 ··· Joint end portion K ··· Depression TM ··· Joint end surface

Claims (2)

A long LED substrate having a large number of LEDs arranged on the side surface of the illumination is accommodated so as to extend in the longitudinal direction in the synthetic resin tube, and an end cap having a terminal portion fitted and attached to a socket portion is the tube. LE attached to the left and right ends of the body and supplying power to the LED through the terminal portion
In the D lighting device,
The LED substrate constitutes a long strip plate-like LED substrate by joining the joining end portions of a plurality of unit substrates, and one unit substrate of the unit substrates to be joined has an entrance opening communicating with the joining end portion. Is provided with a joining hole narrower than the inner part, and the other unit substrate is provided with a joining projection that fits into the joining hole, and the unit substrates are joined to each other by fitting the joining hole and the joining projection. An LED lighting apparatus, wherein the unit substrates are connected to each other in an electric circuit in a bonded state. Each unit substrate has a conductive foil that forms a wiring pattern formed up to the joint end surface, and the unit substrates are connected to each other by soldering at the conductive foil portion formed up to the joint end surface. The LED lighting device according to claim 1, wherein:

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