JP2013196944A - Led lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lighting device facilitating replacing work of an LED element.SOLUTION: An LED lighting device is provided with a board fitting member 21, a flexible board 31 to be arranged on the board fitting member 21, an LED element 51 arranged on the flexible board 31, an electric conduction part 41 to be inserted between the flexible board 31 and the LED element 51, and a detachable LED element-pressing cover 61 for pressing the LED element 51. The LED element 51 is sandwiched between the board fitting member 21 and the LED element-pressing cover 61, and thereby, the flexible board 31 and the LED element 51 are electrically connected through the electric conduction part 41.

Description

  The present invention relates to an LED lighting device including an LED element as a light source.

  With respect to a conventional LED lighting device, for example, Japanese Patent Application Laid-Open No. 2004-191901 aims to provide a rail light that does not require soldering or the like, and that allows easy replacement and repair of LEDs and is convenient for installation. A rail light of a light emitting diode has been disclosed (Patent Document 1). In the rail light of the light emitting diode disclosed in Patent Document 1, an LED chip in which an anode electrode and a cathode electrode are attached to a curtain rail case made of a synthetic resin material, and an elastic conductor are alternately arranged. Closely arranged.

JP 2004-191901 A

  Conventional LED elements, when used as a light source for lighting equipment, did not have such a high brightness that sufficient illuminance can be secured. For this reason, it has been very rare that the LED element is used as a light source of lighting equipment. However, in recent years, high-brightness LED elements have been realized. In addition, the LED element itself can be used for 40,000 hours if used at a rated value, consumes low power, and the public's interest in energy saving is increasing, so that the LED element can be used for lighting equipment. Progressing.

  In an LED lighting device provided with such an LED element as a light source, if an initial failure occurs, it is necessary to send the LED lighting device to a production factory and replace the light source. However, when the LED element is directly fixed to the substrate of the lighting device main body, it is necessary to redo the fixing operation of the LED element with respect to the substrate, and thus the light source cannot be easily replaced. Even if only the light source is to be changed in order to change the color of the illumination light, it is very difficult for the individual to perform the work.

  On the other hand, in Patent Document 1 described above, for the purpose of facilitating the replacement and repair of LEDs, a light-emitting diode rail light in which LED chips and conductors are alternately arranged in a case is proposed. According to such a rail light, it is possible to realize an illumination device in which the LED element is not fixed to the substrate. However, when replacing a specific LED chip among the plurality of LED chips mounted on the case, it is necessary to remove other LED chips and conductors from the case in order from the case entrance. For this reason, it cannot be said that the replacement work of the LED chip is easy.

  Accordingly, an object of the present invention is to solve the above-described problems and to provide an LED lighting device that facilitates the replacement work of LED elements.

  An LED lighting device according to the present invention includes an attachment member, a terminal portion, a substrate disposed on the attachment member, an LED element disposed on the substrate, and a terminal portion and the LED element interposed therebetween. A conductive portion to be inserted and a detachable presser member that presses the LED element are provided. By sandwiching the LED element between the attachment member and the pressing member, the terminal portion and the LED element are electrically connected via the conductive portion.

  According to the LED lighting device configured as described above, by removing the pressing member from the LED lighting device, the LED element is released from the state of being sandwiched between the mounting member and the pressing member. For this reason, the replacement | exchange operation | work of an LED element can be performed easily.

  Preferably, the LED illumination device further includes a lens unit that is provided on the opposite side of the mounting member with respect to the LED element and emits light emitted from the LED element.

  Preferably, the conductive portion is formed of a conductive elastic member. According to the LED illumination device configured as described above, the adhesion between the conductive portion, the terminal portion, and the LED element is improved. Thereby, the reliability of the electrical connection between the terminal part and the LED element through the conductive part can be improved.

  Preferably, the conductive portion is formed of an anisotropic conductive elastic member that is energized only in a direction connecting the terminal portion and the LED element. According to the LED illumination device configured as described above, a structure in which the anode and the cathode of the LED element are electrically insulated can be obtained with a simple configuration in the conductive portion.

  Preferably, the attachment member has an attachment surface on which a substrate is disposed and curved in a shape of a primary curved surface. The substrate is a flexible substrate that can be deformed according to the shape of the mounting surface.

  According to the LED lighting device configured in this way, even when the mounting surface of the mounting member is curved and the flexible substrate is deformed according to its shape, the conductive portion is formed by the elastic member. It can suppress that a mechanical stress acts on the connection position between LED elements. Thereby, it is possible to realize various types of LED lighting devices while maintaining the reliability of the electrical connection between the terminal portion and the LED element.

  Preferably, the LED element changes its posture by being pressed by the pressing member with an unequal force. According to the LED illumination device configured as described above, the direction of the light emitted from the LED element and emitted through the lens unit can be freely set.

  Preferably, the LED lighting device further includes a heat radiation fin provided on the attachment member. According to the LED lighting device configured as described above, heat generated by energization of the LED element can be efficiently radiated from the LED lighting device.

  Preferably, the radiation fin is formed integrally with the attachment member by a material forming the attachment member. According to the LED illumination device configured as described above, the LED illumination device including the heat radiation fin can be realized with a simpler configuration.

  As described above, according to the present invention, it is possible to provide an LED lighting device that facilitates replacement work of LED elements.

It is a perspective view which shows the LED lighting apparatus in Embodiment 1 of this invention. It is a disassembly assembly figure which shows the LED lighting apparatus in FIG. It is sectional drawing which shows the LED lighting apparatus in FIG. It is a top view which shows the flexible substrate provided in the LED lighting apparatus in FIG. It is sectional drawing which shows the 3rd modification of the LED lighting apparatus in FIG. It is sectional drawing which shows the 4th modification of the LED lighting apparatus in FIG.

  Embodiments of the present invention will be described with reference to the drawings. In the drawings referred to below, the same or corresponding members are denoted by the same reference numerals.

(Embodiment 1)
FIG. 1 is a perspective view showing an LED lighting apparatus according to Embodiment 1 of the present invention. FIG. 2 is a disassembled assembly view showing the LED lighting device in FIG. 1. FIG. 3 is a cross-sectional view showing the LED lighting device in FIG. 1.

  With reference to FIGS. 1 to 3, LED lighting device 10 in the present embodiment is a lighting device having LED element 51 as a light source.

  The LED lighting device 10 further includes a substrate attachment member 21, a flexible substrate 31, a conductive portion 41, an LED element pressing cover 61, and a lens portion 71. A substrate mounting member 21, a flexible substrate 31, and a conductive portion 41 are provided on one side of the LED element 51, and an LED element pressing cover 61 and a lens portion 71 are provided on the other side.

  The board attachment member 21 includes a base part 22, a rib-like part 23, and a rib-like part 24 as constituent parts thereof. The base 22 has a flat plate shape. The base 22 has a mounting surface 22a and a back surface 22b disposed on the back side thereof. When the attachment surface 22a and the back surface 22b are viewed from the front, the base 22 has a rectangular plan view. The rib-like portions 23 and 24 are formed so as to protrude in a rib shape from the attachment surface 22a. The rib portions 23 and 24 are formed to extend in one direction. The rib-like portions 23 and 24 are formed extending in the longitudinal direction of the base portion 22. The rib-like portion 23 and the rib-like portion 24 are arranged with a space therebetween in the longitudinal direction of the base portion 22.

  The board attachment member 21 is made of a material having excellent heat dissipation. The board attachment member 21 is made of, for example, aluminum, copper, iron, or an alloy containing them. The board attachment member 21 may be formed from a resin containing a metal filler. When the LED element 51 is used in a high temperature state, its life is shortened. In the present embodiment, the life of the LED element 51 can be extended by increasing the heat dissipation of the board mounting member 21.

  The LED lighting device 10 further includes heat radiation fins 26. The radiation fins 26 are provided on the board attachment member 21. The radiating fins 26 are formed integrally with the board mounting member 21 by a material forming the board mounting member 21. The heat radiation fin 26 includes a plurality of protrusions 26t. The protruding portion 26 t is formed to protrude from the back surface 22 b of the base portion 22. The protruding portion 26 t extends in the short direction of the base portion 22. The plurality of projecting portions 26 t are provided at intervals in the longitudinal direction of the base portion 22.

  In consideration of convection caused by heat radiation, the heat radiation fins 26 are preferably provided such that the protrusions 26t extend in the vertical direction (direction perpendicular to the ground).

  In the present embodiment, the fin-integrated substrate mounting member 21 has been described, but the substrate mounting member 21 and the radiation fins may be provided separately. Further, even when the heat radiation fin is not provided, it is possible to prevent the LED element 51 from rising in temperature due to heat radiation through the board attachment member 21.

  FIG. 4 is a plan view showing a flexible substrate provided in the LED lighting device in FIG. 1. With reference to FIGS. 1 to 4, the flexible substrate 31 is disposed on the substrate attachment member 21. The flexible substrate 31 is superimposed on the attachment surface 22 a of the base portion 22. The flexible substrate 31 has flexibility that can be deformed according to the shape of the mounting surface 22a.

  The flexible substrate 31 has a shape corresponding to the shape of the mounting surface 22 a exposed from the rib-like portions 23 and 24. Specifically, the flexible substrate 31 has a pair of linear portions 33 and a connection portion 32 as its constituent parts. The pair of linear portions 33 are disposed on both sides of the rib-like portions 23 and 24 on the attachment surface 22a. The connecting portion 32 is disposed between the rib-like portion 23 and the rib-like portion 24 on the attachment surface 22a, and connects between the pair of linear portions 33.

  With such a configuration, the position of the flexible substrate 31 is regulated by the rib-like portions 23 and 24, so that the flexible substrate 31 is accurately positioned with respect to the substrate attachment member 21. The positioning of the flexible substrate 31 with respect to the substrate mounting member 21 is not limited to the above configuration, and may be a structure using positioning pins, for example.

  The flexible substrate 31 has terminal portions 36 and 37 and wiring patterns 38 and 39. The terminal portions 36 and 37 are provided in the connection portion 32. The terminal portion 36 and the terminal portion 37 are provided at a distance from each other. The terminal part 36 and the terminal part 37 are provided corresponding to the anode and the cathode of the LED element 51, respectively. The wiring pattern 38 and the wiring pattern 39 extend from the terminal portion 36 and the terminal portion 37, respectively, and extend toward a power source (not shown).

  The LED element 51 is provided on the flexible substrate 31. The LED element 51 is disposed so as to overlap the connection portion 32 when the flexible substrate 31 is viewed from the front. A conductive portion 41 is interposed between the LED element 51 and the flexible substrate 31. The conductive part 41 has a sheet shape. The conductive portion 41 is provided in contact with the terminal portion 36 and the terminal portion 37. The conductive portion 41 is provided so as to electrically connect the terminal portion 36 and the anode of the LED element 51 and to electrically connect the terminal portion 37 and the cathode of the LED element 51.

  In the conductive portion 41, a portion connected to the terminal portion 36 and a portion connected to the terminal portion 37 are formed of a conductor so that the anode and the cathode of the LED element 51 are not short-circuited, and the other portions are insulated. It is formed from the body. The LED element 51 disposed on the conductive portion 41 is a surface mount type in which anode and cathode terminals are visible from the back surface of the light emitting surface.

  The LED element pressing cover 61 and the lens portion 71 are provided on the opposite side of the board mounting member 21 with respect to the LED element 51. The LED element presser cover 61 includes a cover part 62, a locking part 63, and a presser part 66 as its constituent parts.

  The cover part 62 is provided on the board attachment member 21 so as to surround the LED element 51. The cover part 62 extends in a cylindrical shape in a direction away from the board attachment member 21. The cover part 62 is formed with a notch part 64. When the LED element presser cover 61 is positioned on the board attachment member 21, the notch portion 64 is fitted into the rib-like portions 23 and 24.

  The LED element pressing cover 61 is detachably attached to the board mounting member 21. Specifically, the locking portion 63 has a claw shape that can be locked to the board mounting member 21. The locking portion 63 extends from the cover portion 62 and extends in a key shape along the outer edge of the base portion 22 of the board mounting member 21.

  The LED element pressing cover 61 is accurately positioned by the notch portion 64 and the locking portion 63 with respect to the substrate mounting member 21 in which the flexible substrate 31, the conductive portion 41, and the LED element 51 are sequentially stacked.

  Note that the structure in which the LED element presser cover 61 is detachably attached to the board mounting member 21 is not limited to the structure using the claw-shaped locking portion 63 described above, and is, for example, a structure using screwing. Also good.

  The pressing portion 66 is provided so as to press the LED element 51. The pressing portion 66 is provided so as to press the LED element 51 toward the conductive portion 41. The pressing portion 66 has an arm shape that extends inward from the cover portion 62 on the conductive portion 41 and extends to the LED element 51. The flexible substrate 31, the conductive portion 41, and the LED element 51 are sandwiched between the pressing portion 66 and the substrate attachment member 21.

  In the present embodiment, the LED element presser cover 61 in which the constituent parts of the cover part 62, the locking part 63, and the presser part 66 are integrally provided has been described. However, these constituent parts constituting the LED element presser cover 61 include , May be provided separately.

  The lens unit 71 emits light emitted from the LED element 51. The lens unit 71 is attached to the LED element presser cover 61. The lens unit 71 is provided to face the LED element 51. The lens portion 71 is provided so as to close the opening end of the cover portion 62 that extends in a cylindrical shape in a direction away from the substrate attachment member 21. The light emitted from the LED element 51 is irradiated to the outside through the lens unit 71.

  The lens unit 71 is not limited to the spherical lens shown in FIG. 3. For example, a cylindrical lens may be used as the lens unit 71, and a plurality of LED elements 51 may be provided at positions facing the lens.

  By connecting a plurality of LED lighting devices 10 in FIG. 1, various types of lighting devices can be configured. For example, if the LED lighting device 10 in FIG. 1 is formed in a linear shape, a lighting device such as a straight tube type of a current fluorescent lamp can be configured. Moreover, if the LED lighting device 10 in FIG. 1 is connected in a curved shape or a polygonal shape, a ring-shaped lighting device can be configured.

  In the LED lighting device 10 according to the present embodiment, the LED element 51 is sandwiched between the board attachment member 21 and the LED element pressing cover 61, whereby the terminal part 36 of the flexible board 31 through the conductive part 41, 37 and the LED element 51 are electrically connected. The terminal portions 36 and 37 of the flexible substrate 31 and the LED element 51 are not soldered.

  According to such a configuration, by removing the LED element pressing cover 61 from the board mounting member 21, the LED element 51 is released from the state of being sandwiched between the board mounting member 21 and the LED element pressing cover 61. For this reason, the replacement | exchange operation | work of the LED element 51 can be performed easily.

  The structure of the LED lighting device according to Embodiment 1 of the present invention described above will be described together. The LED lighting device 10 according to the present embodiment includes a board mounting member 21 as a mounting member, and terminal portions 36 and 37. The flexible board 31 as a board | substrate arrange | positioned on the board | substrate attachment member 21, the LED element 51 arrange | positioned on the flexible board | substrate 31, and the terminal parts 36 and 37 and the LED element 51 are inserted. The electroconductive part 41 and the LED element pressing cover 61 as a detachable pressing member which presses the LED element 51 are provided. When the LED element 51 is sandwiched between the board attachment member 21 and the LED element pressing cover 61, the terminal portions 36 and 37 and the LED element 51 are electrically connected via the conductive portion 41.

  According to the LED illumination device 10 according to the first embodiment of the present invention configured as described above, the LED element 51 can be easily replaced even if an initial failure occurs or the illumination light is changed. Can be done. Moreover, since the LED element 51 can be easily removed, the lighting device can be easily recycled. Since it is possible to continue using the lighting device by replacing only the LED element 51, an environmentally friendly product can be realized.

  Furthermore, since soldering is not required when assembling the lighting device using the LED element 51, the manufacturing process can be simplified and the number of necessary parts can be reduced. Moreover, since the board | substrate and the LED element 51 are not soldered, even if it is a case where the board | substrate surface does not have a planar shape, it is possible to carry out the replacement work of the LED element 51 without applying mechanical stress. it can.

(Embodiment 2)
In the present embodiment, various modifications of the LED lighting device 10 in FIG. 1 will be described. Hereinafter, as compared with LED lighting device 10 in the first embodiment, the description of the overlapping structure will not be repeated.

  With reference to FIG. 3, in the first modification, the conductive portion 41 is formed of an elastic member. Specifically, the conductive portion 41 is configured such that metal, carbon, or the like excellent in conductivity is in a granular, linear, or plate-like form and is contained in an elastic body such as rubber, silicon, or sponge.

  When the conductive portion 41 is formed of a hard member, the conductive portion 41, the LED element 51, and the flexible substrate are used even though the pressing force acts on the LED element 51, the conductive portion 41, and the flexible substrate 31 from the LED element pressing cover 61. There is a possibility of point contact with 31. In this case, there is a concern that the electrical resistance increases at the connection position between the two and the LED element 51 is damaged.

  On the other hand, in this modification, the adhesiveness between the electroconductive part 41, the LED element 51, and the flexible substrate 31 can be improved by forming the electroconductive part 41 from an elastic member. As a result, the reliability of electrical connection between the LED element 51 and the flexible substrate 31 via the conductive portion 41 can be improved.

  Further, when the conductive portion 41 is formed of an elastic member, even if there are some irregularities on the terminal surface of the LED element 51 or the terminal surface of the flexible substrate 31, such irregularities are caused by the elastic deformation of the conductive portion 41. Can be canceled. Even when the terminal surface of the LED element 51 and the terminal surface of the flexible substrate 31 are not parallel to each other, the same effect can be obtained.

  In addition, when forming the electroconductive part 41 from a hard member, the electroconductive paste is apply | coated to the connection position between the electroconductive part 41, the LED element 51, and the flexible substrate 31, and the adhesiveness between both is improved. be able to.

  Referring to FIG. 3, in the second modification, conductive portion 41 is formed of an anisotropic conductive elastic member that can be energized only in the thickness direction. That is, the conductive portion 41 conducts electricity only in the direction connecting the terminal portions 36 and 37 of the flexible substrate 31 and the LED element 51.

  As the anisotropic conductive elastic member, for example, a member in which a conductor wire such as metal or carbon or a continuous filler is connected to the elastic body in the thickness direction of the conductive portion 41 is used. . The size of the line and filler contained in the elastic body has a sufficiently small cross-sectional area as compared with the terminals arranged above and below the conductive portion 41 and has a sufficient density. With such a configuration, the conductive portion 41 that exhibits conductivity only in the thickness direction of the conductive portion 41 and exhibits insulation in the orthogonal direction is realized.

  The conductive portion 41 electrically connects the LED element 51 and the terminal portions 36 and 37 of the flexible substrate 31. At this time, the anode and cathode of the LED element 51 must not be short-circuited. When there is a sufficient distance between the anode and the cathode of the LED element 51, as described in the first embodiment, only the portion corresponding to the anode and the cathode is formed from the conductor, and the other portion is formed from the insulator. 41 can be used, but there are many LED elements 51 having a short pitch of 1 mm or less between the anode and the cathode.

  On the other hand, in this modification, the LED element is formed by inserting a conductive portion 41 formed of an anisotropic conductive elastic member between the LED element 51 and the terminal portions 36 and 37 of the flexible substrate 31. A structure in which the anode and cathode of 51 are electrically insulated can be obtained with a simple configuration.

  FIG. 5 is a cross-sectional view showing a third modification of the LED lighting device in FIG. FIG. 5 is a diagram corresponding to FIG. 3 in the first embodiment.

  Referring to FIG. 5, in the present modification, the conductive portion 41 is formed of an elastic member, as in the first modification or the second modification.

  Furthermore, in this modification, the mounting surface 22a is curved because the substrate mounting member 21 has a shape that is curved in an arc shape. More specifically, the attachment surface 22a is curved into a primary curved surface shape (a shape obtained by bending a flat surface into a concave shape or a convex shape into a cylindrical shape). On the attachment surface 22a, the flexible substrate 31, the conductive portion 42, and the LED element 51 are overlaid. The flexible substrate 31 is curved according to the shape of the attachment surface 22a.

  When the LED element 51 is soldered to the substrate, mechanical stress is applied to the soldered portion between the LED element 51 and the substrate when the substrate is bent immediately below the LED element 51. In this case, since there is a possibility that the soldering may be removed or the LED element 51 may be destroyed, it is not allowed to bend the substrate at such a position. However, in this modification, the conductive part 41 formed of an elastic member absorbs mechanical stress, and thus such a usage pattern can be realized.

  Note that the deformation tolerance of the flexible substrate 31 varies depending on the thickness and curvature of the conductive portion 41. It is always necessary for the conductive portion 41 and the terminal surface of the LED element 51 and the terminal portions 36 and 37 of the flexible substrate 31 to be in close contact with each other.

  FIG. 6 is a cross-sectional view showing a fourth modification of the LED lighting device in FIG. 1. FIG. 6 is a diagram corresponding to FIG. 3 in the first embodiment.

  Referring to FIG. 6, in the present modified example, similarly to the third modified example, conductive portion 41 is formed of an elastic member, and attachment surface 22 a has a curved shape.

  Furthermore, in this modification, the LED element 51 is pressed by the LED element pressing cover 61 with an unequal force, thereby changing its posture. Specifically, the pressing allowance of the LED element 51 by the pressing portion 66 of the LED element pressing cover 61 differs depending on the location. In the example shown in FIG. 6, the pressing portion 66 is formed so that the pressing margin of the LED element 51 is larger on the right side in the drawing than on the left side. The posture of the LED element 51 is changed so that the light emitting surface of the LED element 51 is directed to the right side by further distorting the conductive portion 41 on the right side in the drawing where the presser foot is large.

  According to such a configuration, even if a lighting device is configured by arranging a plurality of LED elements 51 in a straight line, light can be irradiated in a direction other than the direction orthogonal to the flexible substrate 31. .

  According to the LED lighting device in the second embodiment of the present invention configured as described above, the effects described in the first embodiment can be similarly obtained.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention is used for illumination such as a ceiling light, a learning stand, and a spotlight.

  DESCRIPTION OF SYMBOLS 10 LED illuminating device, 21 Substrate attachment member, 22 Base part, 22a Attachment surface, 22b Back surface, 23, 24 Rib-like part, 26 Radiation fin, 26t Protrusion part, 31 Flexible substrate, 32 Connection part, 33 Linear part, 36, 37 Terminal part, 38, 39 Wiring pattern, 41 Conductive part, 51 LED element, 61 Element holding cover, 62 Cover part, 63 Locking part, 64 Notch part, 66 Holding part, 71 Lens part

Claims (8)

An attachment member;
A substrate having a terminal portion and disposed on the mounting member;
An LED element disposed on the substrate;
A conductive portion interposed between the terminal portion and the LED element;
A detachable presser member that presses the LED element;
The LED lighting device, wherein the terminal element and the LED element are electrically connected via the conductive part by sandwiching the LED element between the attachment member and the pressing member.   The LED lighting device according to claim 1, further comprising a lens unit that is provided on the opposite side of the attachment member with respect to the LED element and emits light emitted from the LED element.   The LED lighting device according to claim 1, wherein the conductive portion is formed of a conductive elastic member.   4. The LED lighting device according to claim 3, wherein the conductive portion is formed of an anisotropic conductive elastic member that energizes only in a direction connecting the terminal portion and the LED element. The mounting member has a mounting surface on which the substrate is disposed and curved in a shape of a primary curved surface,
The LED lighting device according to claim 3 or 4, wherein the substrate is a flexible substrate that can be deformed according to a shape of the mounting surface.   The LED lighting device according to claim 3, wherein the LED element changes its posture by being pressed by the pressing member with an unequal force.   The LED lighting device according to claim 1, further comprising a heat dissipating fin provided on the attachment member.   The LED illuminating device according to claim 7, wherein the heat dissipating fin is formed integrally with the attachment member by a material forming the attachment member.

Images