JP6263974B2 - LED lamp and light source for electric decoration - Google Patents

Description

  The present invention relates to an improvement in a bullet-type LED lamp and a light source body for electric decoration using the same.

  As a long light-emitting device having a plurality of light-emitting portions in which a plurality of LED light-emitting balls are wired in series, there is one disclosed in Patent Document 1. In this Patent Document 1, the light of a highly directional LED is irradiated over as wide a range as possible.

JP-A-10-021707

  The main problem to be solved by the present invention is that, firstly, the light of a cannonball type LED lamp can be efficiently spread in a direction having a certain angle with respect to the optical axis with a simple structure. Secondly, the LED lamp is used as the center of the flower, and the reflector body is used as the petal to provide a flower-like light source for lighting that shines as a whole.

  In order to achieve the above object, according to the present invention, the LED lamp is substantially formed in the sealing resin of the LED constituting the bullet-type LED lamp, and the cross-sectional shape in the direction orthogonal to the optical axis of the LED lamp is substantially set. Two or more grooves having a V shape and continuing in the direction along the optical axis are formed with a gap between adjacent grooves in the direction around the optical axis.

  The light emitted from the LED travels in the optical axis direction at the portion located between the grooves in the side portion of the sealing resin. On the other hand, the light emitted from the LED travels in the direction intersecting the optical axis by the groove wall of the groove in the portion of the side portion of the sealing resin where the groove is formed. As a result, the LED lamp has a wide directivity.

  It is one of the preferred embodiments of the present invention that the tip of the sealing resin is a flat surface along a virtual plane orthogonal to the optical axis. When it does in this way, the part with high emitted light intensity can be formed on an optical axis with the light emitted from the said LED.

  The groove is formed so that the start end is positioned in front of the LED so as to reach the leading end of the sealing resin, and the start end is a flat surface along a virtual plane perpendicular to the optical axis. Is one of the preferred embodiments of the present invention. When it does in this way, the part with high emitted light intensity can be formed in the start end of several said groove | channel with the light emitted from said LED, respectively.

  In order to achieve the above object, according to the present invention, a light source body for electric decoration is arranged in a circular shape by arranging a plurality of reflector pieces each having a petal shape from the base side toward the open side. The LED lamp is arranged in the center of a reflector body configured to gradually increase the diameter.

  In such a light source body, the light of the LED lamp is effectively irradiated to the reflector body arranged around the LED lamp due to the wide directivity of the LED lamp, and the light source body shines as a whole.

  The LED lamp according to the present invention can efficiently spread light generated from the LED in a direction having a certain angle with respect to the optical axis by the groove formed in the sealing resin of the LED constituting the LED lamp. It has the feature of having a wide directivity with a simple structure. Moreover, the light source body for electrical decoration according to the present invention forms a flower-like light source that shines as a whole due to the wide directivity of the LED lamp, with the LED lamp as the center of the flower and the reflector body as the petal.

FIG. 1 is a side view of an LED lamp according to an embodiment of the present invention, in which an intermediate lead is omitted. FIG. 2 is a plan view of the LED lamp. FIG. 3 is a bottom view of the LED lamp. FIG. 4 is a cross-sectional configuration diagram of the LED lamp. FIG. 5 is a perspective view of an embodiment of a light source body for electric decoration configured to include the LED lamp. FIG. 6 is an exploded perspective view of the light source body, and also shows an illumination base socket constituting the illumination system. FIG. 7 is a side view showing the light source body and the socket in a separated state. FIG. 8 is a side view showing a state where the plug portion of the light source body is fitted in the socket. FIG. 9 is a cross-sectional view of the state of FIG. FIG. 10 is an exploded perspective view of an embodiment of a resistor constituting the illumination system, and also shows an illumination base socket constituting the illumination system. FIG. 11 is a side view showing a state in which the plug portion of the resistor is fitted in the socket. FIG. 12 is a configuration diagram of an LED collective circuit constituting the illumination system. FIG. 12 is a side view of a main part of an illumination base constituting the illumination system.

  Hereinafter, typical embodiments of the present invention will be described with reference to FIGS.

  1 to 4 show an LED lamp 1 according to an embodiment of the present invention. The LED lamp 1 is a so-called bullet-type LED lamp, and has a structure capable of efficiently spreading emitted light in a direction having a certain angle with respect to the optical axis x. That is, the LED lamp 1 according to this embodiment has a wide directivity.

  FIG. 5 shows a combination of the LED lamp 1 and the reflector body 2, and a flower-like light source L for flower decoration with the LED lamp 1 as the center of the flower and the reflector body 2 as the petal. In such a light source body L, the light of the LED lamp 1 is effectively irradiated to the reflector body 2 arranged around the LED lamp 1 due to the wide directivity of the LED lamp 1, and the light source body L as a whole It has come to shine.

  FIG. 13 shows an illumination base B of an LED illumination system having a plurality of sockets 80 corresponding to the plug portion 3 of the light source body L. In such an LED illumination system, the plug portion 3 of the light source body L is fitted into a socket 80 provided at a desired position, and a plug portion of a resistor R which will be described later is inserted into the socket 80 into which the light source body L is not fitted. 4, the LED illumination system having a desired number of light source bodies L at desired positions is appropriately configured in such a manner that the number and positions of these light source bodies L can be appropriately changed as necessary. Can be made.

(LED lamp 1)
As shown in FIGS. 1 to 4, the LED lamp 1 has a direction orthogonal to the optical axis x of the LED 12 lamp 1 on the outer peripheral portion around the optical axis x of the sealing resin 10 of the LED 12 constituting the LED lamp 1. The cross-sectional shape of the groove 10a is substantially V-shaped, and two or more grooves 10a continuing in the direction along the optical axis x are formed with an interval between adjacent grooves 10a in the direction around the optical axis x. .

  In the figure, reference numeral 11 is a lead frame, reference numeral 12 is a chip-like LED, reference numeral 13 is a wire, and reference numeral 14 is a lead. The sealing resin 10 is a plastic having transparency or translucency, and is formed by filling a synthetic resin to be a plastic in the molding die from a state where the lead frame is positioned in the molding die. . Typically, the sealing resin 10 has a front end portion 10f positioned in front of the LED 12 and a rear end portion 10h positioned rearward of the lead frame 11, and the side portion 10i thereof is in the optical axis x direction. In any of the positions, the shape substantially follows the arc of a virtual circle (not shown) that goes around the optical axis x around the optical axis x. The sealing resin 10 does not change the outer diameter from the rear end portion 10h to a substantially middle position of the entire length, but gradually decreases from the middle position to the front end portion 10f in the forward direction. The shape is A portion 10 j where the outer diameter of the sealing resin 10 starts to be gradually reduced is located in front of the LED 12.

  The groove 10 a is formed so that the start end 10 b is positioned in front of the LED 12 and reaches the tip end portion 10 f of the sealing resin 10. In the illustrated example, the start end 10b of the groove 10a is located in front of the LED 12 and behind the portion 10j where the outer diameter of the sealing resin 10 starts to be gradually reduced. The starting end 10b of the groove 10a is a flat surface 10c along a virtual plane orthogonal to the optical axis x. In the example shown in the drawing, the groove 10a intersects the left and right groove walls 10d and 10d at the groove bottom. As a result, the flat surface 10c has an isosceles triangular shape with the groove bottom of the groove 10a facing the bottom when viewed from the front end 10f side of the sealing resin 10 (FIG. 2). . Further, in the illustrated example, the groove 10a gradually becomes shallower as it approaches the front end portion 10f of the sealing resin 10, and the end 10e of the groove 10a located at the front end portion 10f of the sealing resin 10 is opened forward. I am letting. In the illustrated example, eight grooves 10a are formed in the sealing resin 10, and the interval between the adjacent grooves 10a and 10a is equal at any position in the direction around the optical axis x. ing.

  Further, the front end portion 10f of the sealing resin 10 is a flat surface 10g along a virtual plane orthogonal to the optical axis x.

  The light emitted from the LED 12 travels in the direction of the optical axis x in the portion of the side portion 10i of the sealing resin 10 located between the grooves 10a. On the other hand, the light emitted from the LED 12 is directed in the direction intersecting the optical axis x by the groove wall 10d of the groove 10a in the portion of the side portion 10i of the sealing resin 10 where the groove 10a is formed. . As a result, the LED lamp 1 according to this embodiment has a wide directivity.

  Moreover, since the front end portion 10f of the sealing resin 10 has a flat surface 10g, a portion with high emission intensity is formed on the optical axis x by the light emitted from the LED 12.

  In addition, since the start end 10b of the groove 10a in the sealing resin 10 is also a flat surface 10c, a portion having high emission intensity is formed at each of the start ends 10b of the plurality of grooves 10a by light emitted from the LEDs 12. Is done.

  In the illustrated example, when the LED lamp 1 is viewed from the front, a portion having a high light emission intensity is formed at the position of the optical axis x, and the start end 10b of the groove 10a is equally spaced in the circumferential direction around this. A plurality of portions with high emission intensity are formed.

  When the sealing resin 10 was not provided with the groove 10a and the tip portion 10f was sharpened, the angular distribution of light emission intensity was as shown by the dotted line in Table 1. That is, the light emission intensity of the LED lamp 1 was slightly weakened at the position of the optical axis x (0 degree), and the spread of light was in a range of about plus or minus 45 degrees across the optical axis x.

When the groove 10a was provided in the sealing resin 10 as described above and the flat surface 10g was formed at the tip portion 10f, the angular distribution of light emission intensity was as shown by the solid line in Table 1. That is, the light emission intensity of the LED lamp 1 was increased at the position of the optical axis x (0 degree), and the spread of light was in the range of about plus or minus 60 degrees across the optical axis x.

(Light source body L)
As shown in FIG. 5, the light source body L has a cylindrical shape in which a plurality of reflector pieces 20 each having a petal shape are arranged in a circular shape to gradually increase the inner and outer diameters from the base 20 a side toward the open side. The LED lamp 1 is arranged in the center of a reflector body 2 configured to exhibit.

  In the illustrated example, the light source body L includes the LED lamp 1, a reflector body 2, and a plug portion 3.

  The reflector body 2 is integrated with a cylindrical base 21 having both ends open. The reflector piece 20 has a base 20 a integrally connected to one end of the cylindrical base 21. In the illustrated example, the reflector piece 20 is integrated with the adjacent reflector piece 20 on the base 20a side, but is separated from the adjacent reflector piece 20 on the open side via a notch 20b. It is an aspect. Moreover, each reflector piece part 20 makes the edge part of the said open side the arc-shaped edge 20c, and, thereby, each reflector piece part 20 exhibits petal shape.

  The LED lamp 1 is combined with the reflector body 2 side in a state where the lead 14 protrudes rearward from the other end of the cylindrical base 21 and the sealing resin 10 is positioned inward of the reflector body 2. It is like that.

  In this embodiment, the reflector body 2 and the cylindrical base 21 are plastic molded articles having both a function of reflecting light transmitted from the LED 12 and a function of transmitting light.

  The plug portion 3 includes a receiving portion 30 of the cylindrical base 21 and a fitting portion 31 into a socket 80 described later. When the cylindrical base 21 of the reflector body 2 combined with the LED lamp 1 as described above is inserted into the receiving portion 30 with the lead 14 of the LED lamp 1 first, the through hole 32 formed in the fitting portion 31 is inserted. The lead 14 protrudes outward from the fitting portion 31 of the plug portion 3. The reflector 14, the LED lamp 1, and the plug portion 3 are integrated with each other by the lead 14 that is folded back toward the receiving portion 30 from this state.

  One end of a strip-like piece 33 is connected to the entrance of the receiving part 30 of the plug part 3 via a resin hinge part 33a. An engaging head 34 is formed at the other end of the strip 33. In the illustrated example, the anode-side or cathode-side lead 14 is positioned on the side where the strip-shaped piece 33 is formed, and the engagement head of the strip-shaped piece 33 is engaged with an engaged portion 80b of a socket 80 described later. When the plug portion 3 of the light source body L is fitted in the direction in which the portion 34 is engaged, the LED lamp 1 is appropriately electrically connected to an LED 12 collective circuit described later.

(LED illumination system)
As shown in FIG. 13, the LED illumination system includes an illumination base B, a plurality of light source bodies L, L..., And a plurality of resistors R, R.

  The illumination base B comprises a plurality of branch lines 8 formed by connecting a plurality of sockets 80, 80... In series between the common lines 7, 7 to form a parallel LED assembly circuit, and each branch line The number of the sockets 80 constituting 8 is made equal.

  An example of the configuration of the LED aggregate circuit is shown in FIG. In the figure, reference numeral 9 denotes a power source. The number of branch lines 8 is changed as necessary. One branch line 8 is provided with at least one resistor R. In the illustrated example, one branch line 8 is provided with four sockets 80 (not shown in FIG. 12).

  A configuration example of the illumination base B is shown in FIG. In the figure, reference numeral 7 ′ is a wiring constituting the common line 7, reference numeral 8 ′ is a wiring constituting the branch line 8, and reference numeral 80 is a socket. In the illustrated example, the illumination base B is a long body composed of the wirings 7 ', 8' and a plurality of sockets 80, 80, etc., and is suspended, stretched, wound around an object, etc. Thus, it can be installed.

  The socket 80 has a cup shape for receiving the plug portion 3 of the light source body L. Inside the socket 80 is provided a terminal 80a that forms part of the wiring 8 'of the branch line 8 of the LED collective circuit. An engaged portion 80 b for the engagement head 34 of the plug portion 3 is formed on the outer side of the socket 80 on the insertion opening side. In the illustrated example, the engaged portion 80b is formed by forming a groove 80d having a width that allows the strip 33 of the plug portion 3 to pass but not the engaging head 34 between the pair of ribs 80c and 80c. It is configured. The light source body L is configured such that the plug portion 3 can be fitted into the socket 80 until the position below the receiving portion 30 of the plug portion 3 is accommodated in the socket 80. When the plug portion 3 of the light source body L is fully fitted into the socket 80, the resin hinge portion 33a is bent and the belt-like member 33 is rotated in a direction in which the other end of the belt-like member 33 is brought closer to the side of the plug portion 3. The band-shaped body 33 enters the groove 10a, and the engaging head 34 enters under the pair of ribs 80c and 80c and is caught by the lower end of the rib 80c. Thereby, the combination state of the light source body L to the socket 80 is stably maintained. When the plug portion 3 of the light source body L is fully inserted into the socket 80, the terminal 80a provided in the socket 80 is in contact with and electrically connected to the lead 14 of the light source body L (FIG. 9). Thereby, the LED lamp 1 of the light source body L becomes a part of the LED aggregate circuit.

  The resistor R includes a plug portion 4 for the socket 80 and a resistance element 5 that becomes a part of the LED collective circuit by fitting the plug portion 4 into the socket 80. In the example shown in the figure, the resistor R has a resistor element 5 housed in a plug portion 4 substantially the same as the plug portion 3 of the light source body L. In the figure, reference numeral 42 denotes an engaging head of the socket 80 with respect to the engaged portion 80 b, and reference numeral 41 denotes a belt-like body 41 that connects the engaging head 42 and the entrance of the receiving portion 40 of the resistance element 5 of the plug portion 4. Reference numeral 6 denotes a cap that closes the receiving portion 40 of the plug portion 4 in which the resistance element 5 is housed. A lead 51 electrically connected to the resistance element 5 is projected outside the plug portion 4 of the resistor R in the same manner as the light source body L and is folded back. When the plug portion 4 of the resistor R is fully inserted into the socket 80, the terminal 80a provided in the socket 80 is in contact with and electrically connected to the lead 51 of the resistor R. Thereby, the resistance element 5 of the resistor R becomes a part of the LED aggregate circuit.

  According to such an LED illumination system, the number and arrangement of the light source bodies L provided in one branch line 8 can be easily and appropriately changed as necessary, whereby the entire LED illumination system can be changed. The number and arrangement of the light source bodies L can be customized as required. If a plurality of types of resistors R with different resistance values of the resistance element 5 are prepared, the luminance of the light source L can be customized depending on the type of the resistor R to be used. In the example of FIG. 11, one resistor R is used in the branch line 8 that uses three light source bodies L (the bottom and top branch lines 8 in FIG. 12), and two light source bodies L are used. Two resistors R are used in the branch line 8 (second branch line 8 from the bottom of FIG. 12), and three resistors R are used in the branch line 8 using one light source body L (FIG. 12). The second branch line 8) from the top.

In the example shown in FIG. 12, for example, when the LED lamp 1 (VF = 2.0V) is driven at 15 mA with a 12 V power supply, the number of resistors R and the resistance value of the resistor element 5 are as follows: become.
(1) When there are three light source bodies L, there are one resistor R. The resistance value is 400Ω from the following equation.
R = (12 (V) -2.00 (V) × 3) /0.015=400Ω
(2) When there are two light source bodies L, there are two resistor bodies R. The sum of the resistance values of the two resistors R and R is 533Ω from the following equation.
R = (12-2 × 2) /0.015=533Ω
(3) When the number of light source bodies L is one, the number of resistors R is three. The sum of the resistance values of the three resistors R... R is 666Ω from the following equation.
R = (12-2 × 1) /0.015=666Ω

  Of course, the present invention is not limited to the embodiments described above, but includes all embodiments that can achieve the object of the present invention.

x Optical axis 1 LED lamp 10 Sealing resin 10a Groove 12 LED

Claims (4)

The LED sealing resin constituting the bullet-type LED lamp is a groove that continues in the direction along the optical axis by making the cross-sectional shape perpendicular to the optical axis of the LED lamp substantially V-shaped , An LED lamp in which a start end is positioned in front of the LED and two or more grooves are formed between the adjacent grooves in the direction around the optical axis. . The LED lamp according to claim 1 , wherein the start end is a flat surface along a virtual plane orthogonal to the optical axis . The LED lamp according to claim 1 , wherein a front end portion of the sealing resin is a flat surface along a virtual plane orthogonal to the optical axis . A plurality of reflector pieces each having a petal shape are arranged in a circular shape, and at the center of a reflector body configured to gradually increase the inner and outer diameters from the base side toward the open side, A light source for electric decoration, comprising the LED lamp according to any one of the above.

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