JP2013004248A - Led lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lamp 1 capable of efficiently performing heat radiation.SOLUTION: In the LED lamp 1 including a base 2 having a terminal section 11, a lens member 6, a connection member 7 for connecting the base 2 and the lens member 6, and an LED board 4 preparing LED elements 3, wherein a storage space for storing the LED board 4 is formed of at least the base 2 and the connection member 7, a communication port 14 for communicating the storage space and an external space is formed between the base 2 and the connection member 7, a part of the LED board 4 externally sticks out from the communication port 14, and an outer surface of the base 2 and a part of the LED board 4 are connected with a thermal conductive member 17.

Description

  The present invention relates to a lamp using, for example, an LED.

  Conventionally, for this type of lamp, for example, a substrate on which an LED chip is mounted, an instrument body to which the substrate is attached, a holding member that holds a lens unit that controls light distribution of light emitted from the LED chip, (For example, refer to FIG. 1 of Patent Document 1).

  In such a conventional lamp, the holding member is formed of a synthetic resin, and has a substantially disk-shaped bottom portion and a side portion extending upward from the outer edge of the bottom portion over the entire circumference.

  In this conventional lamp, in order to release heat from the LED chip to the outside, heat radiation holes are formed in the bottom and side portions of the holding member. This lamp can release the heat of the LED chip to the outside from the heat dissipation hole by air convection.

JP 2008-186636 A

  In a conventional lamp, a heat radiating hole is formed in the holding member and the heat of the internal LED chip is released by air convection, so it takes time until the heat of the LED chip is released to the outside. The efficiency of heat dissipation was low.

  This invention is made | formed in view of said situation, and makes it a subject to provide the LED lamp which can perform heat dissipation efficiently.

  This invention is for solving said subject, Comprising: It has a nozzle | cap | die which has a terminal part, a lens member, a connection member which connects a nozzle | cap | die and a lens member, and an LED board in which an LED element is provided. An LED lamp in which a storage space for storing the LED substrate is formed by at least the base and the connecting member, and a communication port that connects the storage space and the external space is formed between the base and the connecting member. In addition, a part of the LED board protrudes from the communication port, and the outer surface of the base and a part of the LED board are connected by a heat conductive member.

  According to such a configuration, a part of the LED substrate protruding outside from the LED lamp and the outer surface of the base are connected by the heat conductive member, so that the heat generated by the LED element passes through the heat conductive member. Thus, the light is transmitted directly from the LED substrate to the base. Thereby, the LED lamp can perform efficient heat dissipation. Moreover, it is desirable that this heat conductive member is made of metal.

  Further, in the LED lamp according to the present invention, the connecting member is inserted into the base and has a protrusion that protrudes so as to overlap the wall of the base, and the protrusion is configured in a plate shape. In addition, the base has a through-hole penetrating in the thickness direction, and the base has a hole penetrating the wall portion from the outer surface toward the inner surface, and the hole has a protrusion formed at the edge thereof. In addition, it is desirable that the connecting member and the base be connected by inserting the protrusion of the base into the hole formed in the protruding portion of the connecting member.

  According to such a configuration, since the connection between the connecting member and the base is performed simply by forming the through hole from the outer surface of the base, the workability of assembling the LED lamp is improved.

  With the LED lamp according to the present invention, it is possible to efficiently dissipate heat.

FIG. 1 is a front view of an embodiment of an LED lamp. FIG. 2 is a cross-sectional view of the LED lamp in the same embodiment. FIG. 3 is an exploded perspective view of the LED lamp in the same embodiment. FIG. 4 is a bottom view of the LED lamp in the same embodiment. FIG. 5 is a plan view of the LED lamp in the embodiment. FIG. 6 is a cross-sectional view of a main part of the LED lamp in the same embodiment. FIG. 7 is a cross-sectional view of a main part of the LED lamp in the same embodiment.

  Hereinafter, the form for implementing the LED lamp which concerns on this invention is demonstrated, referring drawings. 1-7 shows one Embodiment of the LED lamp 1 which concerns on this invention.

  As shown in FIGS. 1 to 3, the LED lamp 1 includes a base 2, an LED board on which the LED element 3 is mounted, a control board 5 for controlling the LED element 3, a lens member 6, and this lens. A connecting member (joint) 7 that connects the member 6 and the base 2 is provided. In the present embodiment, for convenience of explanation, the part on the lens member 6 side of the LED lamp 1 is referred to as “upper part” and the part on the base 2 side is referred to as lower part. Further, the direction from the base 2 toward the lens member 6 may be referred to as “upward”, the direction from the lens member 6 toward the base 2 may be referred to as “downward”, and the direction along these may be referred to as “vertical direction”.

  As shown in FIGS. 1 to 3, the base 2 is made of metal and has a cylindrical shape. The base 2 is closed at one end (lower end) in the tube center direction, and two terminal portions 11 are provided on the end face (bottom face) (see FIG. 4). The base 2 has a flange portion 12 at the other end portion (upper end portion) in the tube center direction. On the outer surface of the base 2, a protruding portion 13 that protrudes outward is formed so as to be engageable with a device such as a socket to which the LED lamp 1 is connected.

  The LED substrate 4 has a substantially circular central portion 4a and two projecting portions 4b and 4b projecting radially outward from the central portion 4a.

  The LED element 3 is mounted on the central portion 4 a of the LED substrate 4. A control board 5 is electrically connected to the central portion 4a.

  Moreover, the heat transfer pattern 15 for transferring the heat generated from the LED element 3 is formed on the LED substrate 4 (see FIG. 6). The heat transfer pattern 15 is formed so as to be connected to the front surface and the back surface of the LED substrate 4. In the present embodiment, the heat transfer pattern 15 is configured by forming a thin film made of metal (for example, copper) on both surfaces of the LED substrate 4.

  Each protrusion 4b of the LED substrate 4 is formed with a recess 23 that is recessed from its tip toward the center 4a. As shown in FIG. 6, the heat transfer pattern 15 of the LED substrate 4 is continuously formed on the front surface side and the back surface side of the LED substrate 4 across the recess 23. More specifically, the heat transfer pattern 15 includes a connecting portion 16 that connects a pattern on the front surface (upper surface) side of the LED substrate 4 and a pattern on the rear surface (lower surface) side. The connecting portion 16 is provided on a surface constituting the concave portion 23 of the LED substrate 4. In other words, the heat transfer pattern 15 is formed so as to be connected to the front surface side and the back surface side of the LED substrate 4 via the concave portion 23 of the LED substrate 4.

  The LED substrate 4 is set so that its length (the length from one projecting portion 4b to the other projecting portion 4b) is larger than the outer diameter of the flange portion 12 so as to be placed on the flange portion 12 of the base 2. Has been. From this, when the LED substrate 4 is placed on the flange portion 12 of the base 2, the lower surface of each protruding portion 4 b comes into contact with the flange portion 12. In this state, each protrusion 4b protrudes outward from the flange 12 of the base 2 (exposed).

  The LED substrate 4 is fixed to the base 2 with solder 17. Specifically, as shown in FIGS. 1 and 6, the concave portion 23 of the protruding portion 4 b that is placed on the flange portion 12 of the base 2 and protrudes outward, and a part of the base 2 immediately below the solder 2 are soldered. 17 are connected. For fixing the LED substrate 4 to the base 2, copper or other metal may be used in addition to the alloy such as the solder 17.

  The control board 5 is mounted with elements such as an IC chip 19 for controlling the LED elements 3. The control board 5 has two protrusions 5a and 5a connected to the LED board 4 at one end thereof. Two electrodes 20, 20 connected to the respective terminal portions 11 of the base 2 are provided at the other end portion of the control board 5.

  The lens member 6 is configured in a circular shape in plan view (see FIG. 5) with a transparent or translucent resin. The lens member 6 includes a lens portion 21 and a connecting portion 22 that is formed below the lens portion 21 and connected to the connecting member 7.

  As shown in FIG. 2, a concave portion 21 a that is recessed downward from the upper end is formed on the outer surface of the lens portion 21. The lens member 6 can transmit the light from the LED element 3 and irradiate the light to the outside from the concave portion 21 a of the lens portion 21 and its side surface.

  The connecting portion 22 is formed in an annular shape (or cylindrical shape) that protrudes downward from the lower portion of the lens portion 21. A protrusion 24 for connecting the lens member 6 to the connecting member 7 is formed on the outer surface of the connecting portion 22. The protruding portion 24 is formed to protrude outward in the radial direction of the connecting portion 22.

  As shown in FIGS. 2 and 3, the connecting member 7 includes an annular main body 31 and protrusions 32 a to 32 d that protrude downward from the main body 31.

  The main body 31 is formed so that the inner diameter thereof is larger than the outer diameter of the connecting part 22 so that the connecting part 22 of the lens member 6 enters inside. A protrusion 33 is formed on the inner surface of the main body 31 to lock the protrusion 24 formed on the connecting portion 22 of the lens member 6. The protrusion 33 is formed to protrude inward in the radial direction of the main body 31.

  The main body 31 is formed with two recesses 34, 34 that are recessed upward from the lower surface thereof. The recesses 34 are formed at predetermined intervals in the circumferential direction of the main body 31. Specifically, the two concave portions 34 are located on a straight line along the radial direction of the main body portion 31.

  The lower surface 31 a of the main body 31 is configured to abut on the flange portion 12 on the upper portion of the base 2. In a state where the lower surface 31 a of the main body 31 is in contact with the flange portion 12 of the base 2, a communication port that communicates the inside and the outside between the edge of the concave portion 34 of the main body 31 and a part of the flange portion 12 of the base 2. 14 is formed (see FIG. 1). The communication port 14 communicates a storage space formed in the LED lamp 1 for storing the LED board 4 and the control board 5 with a space outside the LED lamp 1.

  The communication port 14 is also for preventing the main body portion 31 from coming into contact with the LED substrate 4 placed on the flange portion 12 of the base 2. Specifically, as shown in FIGS. 1 and 6, in a state where the LED substrate 4 is placed on the flange portion 12 of the base 2, the protruding portion 4 b of the LED substrate 4 does not contact the main body portion 31. , Projecting outward through the communication port 14.

  On the outer surface of the main body 31, two protrusions 35, 35 that protrude outward in the radial direction are formed. The protrusion 35 is configured in a straight line having a predetermined length along the vertical direction of the main body 31.

  The protruding portions 32 a to 32 d of the connecting member 7 are formed to protrude downward from a position corresponding to the inner surface of the main body portion 31. In the present embodiment, the projecting member 32 a to 32 d is formed on the connecting member 7. Each protrusion part 32a-32d is comprised by the cross-sectional arc-shaped plate shape. Of the four protrusions 32 a to 32 d, the two protrusions 32 a and 32 b have a side edge 34 a of the recess 34 so as to sandwich one of the two recesses 34 formed in the main body 31. It is formed corresponding to. Two other similar projecting portions 32c and 32d are formed corresponding to the side edge portion 34a of the recess 34 so as to sandwich the other recess 34.

  The protrusions 32 a to 32 d of the connecting member 7 are inserted into the base 2 to connect the base 2 and the connecting member 7. Therefore, the radius of curvature of the projecting portions 32 a to 32 d configured in an arc shape is set smaller than the inner diameter of the midway portion of the base 2.

  Of the two protrusions 32a and 32b provided corresponding to the one recess 34, the one protrusion 32a is formed with a hole 36 penetrating in the thickness direction (plate thickness direction). Of the two protrusions 32c and 32d provided corresponding to the other recess 34, a similar hole (not shown) is also formed in one protrusion 32c.

  The hole 36 is formed at a position along the longitudinal direction (vertical direction) of the linear protrusion 35 formed on the outer surface of the main body 31. That is, when an extension line extending downward from the linear protrusion 35 is drawn, the hole 36 is positioned on the extension line. When the LED lamp 1 is assembled, the LED lamp 1 is inserted into the base 2 so that it cannot be seen from the outside. At this time, the protruding portion 35 functions as a mark for confirming that the hole 36 exists immediately below the protruding portion 35.

  The holes 36 formed in the protrusions 32 a and 32 c are used for connecting the connecting member 7 and the base 2. As shown in FIG. 7A, the connecting member 7 and the base 2 are connected by passing a pointed tool 41 inward from the outer surface of the base 2. Specifically, the protrusions 32 a to 32 d of the connecting member 7 are inserted into the base 2 and formed in the protrusions 32 a and 32 c of the connecting member 7 in a state where they are positioned so as to overlap the side wall of the base 2. A through-hole 42 is formed at a predetermined position of the base 2 corresponding to the formed hole 36 by a pointed tool 41 from the outer surface side to the inner surface side of the base 2. At this time, a cylindrical projection 43 is formed in the through hole 42 so as to project inward from the edge thereof (see FIG. 7B). The cylindrical projection 43 is inserted into the hole 36 of the projecting portions 32 a and 32 c of the connecting member 7, thereby connecting the base 2 and the connecting member 7.

  Hereinafter, the manufacturing method (assembly method) of the LED lamp 1 in this embodiment is demonstrated. In order to manufacture the LED lamp 1, first, the LED board 4 and the control board 5 are electrically connected to each other, thereby forming an LED unit. Next, the LED unit is accommodated in the base 2. At this time, the protruding portion 4 b of the LED substrate 4 is placed on the flange portion 12 of the base 2. And the electrode 20 of the control board 5 and the terminal parts 11 and 11 formed in the bottom part of the nozzle | cap | die 2 are electrically connected.

  Next, the concave portion 23 of the LED substrate 4 and the base 2 are connected by the solder 17. Thereafter, the protruding portions 32 a to 32 d of the connecting member 7 are inserted inside the base 2.

  When the protruding portions 32 a to 32 d of the connecting member 7 are inserted inside the base 2, the lower surface 31 a of the main body portion 31 is placed on the flange portion 12 of the base 2. At this time, it is desirable that the concave portion 34 formed in the main body 31 and the protrusion 4b of the LED substrate 4 overlap each other so that the main body 31 and the protrusion 4b of the LED substrate 4 do not contact each other.

  In this state, a through-hole 42 is formed from the outside at the position of the base 2 corresponding to the hole 36 formed in the protrusions 32a and 32c of the connecting member 7, and a cylindrical projection 43 is formed at the edge thereof. The The cylindrical projection 43 is inserted into the holes 36 of the protrusions 32a and 32c, whereby the connection member 7 and the base 2 are connected. Thus, when the connection between the connecting member 7 and the base 2 is completed, a storage space for storing the LED board 4 and the control board 5 is formed inside these.

  Thereafter, the lens member 6 is fixed to the connecting member 7. This fixing is performed by inserting the connecting portion 22 of the lens member 6 into the main body portion 31 of the connecting member 7 from above and hooking the protruding portion 33 of the main body portion 31 and the protruding portion 24 of the connecting portion 22. Thereby, the storage space in the LED lamp 1 is in a state where the upper side is covered by the lens member 6. Thus, the LED lamp 1 is completed.

  According to the LED lamp 1 described above, the protruding portion 4b, which is a part of the LED substrate 4, protrudes from the internal storage space to the outside, and the protruding portion 4b and the base 2 are connected by the solder 17, whereby the LED substrate 4 Is securely fixed to the base 2. Furthermore, with this configuration, the heat generated from the LED element 3 is directly transmitted from the LED substrate 4 to the base 2 via the solder 17 that is a heat conductive member. Thereby, the LED lamp 1 can perform efficient heat dissipation. Further, since the LED substrate 4 can be fixed to the base 2 by soldering from the outside, the LED lamp 1 can be easily manufactured.

  Further, when the LED substrate 4 is fixed to the base 2 with the solder 17, since the concave portion 23 is formed in the protruding portion 4 b of the LED substrate 4, the solder 17 easily stays in the concave portion 23. Moreover, the range to which the solder 17 is applied can be limited by the recess 23, and the solder 17 does not reach an excessive range. Furthermore, since the flange portion 12 is formed on the upper portion of the base 2, a large area for contact with the solder 17 is ensured. With these configurations, the LED lamp 1 can sufficiently secure the connecting force of the solder 17 that connects the LED substrate 4 and the base 2.

  Furthermore, since the heat transfer patterns 15 formed on the LED substrate 4 are formed on both surfaces of the LED substrate 4 via the connecting portions 16 formed in the recesses 23, the heat transfer patterns 15 on both surfaces of the LED substrate 4. Is transmitted to the base 2 through the solder 17 at the same time. Also by this, the LED lamp 1 can perform efficient heat dissipation.

  Further, since the communication port 14 is formed between the base 2 and the main body portion 31 of the connecting member 7, heat can be radiated by convection of air through the communication port 14.

  Further, since the connecting member 7 and the base 2 can be connected only by forming the through hole 42 from the outside of the base 2, the LED lamp 1 has good workability in assembly.

  In addition, this invention is not limited to said embodiment, A various change and deformation | transformation are possible.

  For example, in the above-described embodiment, an example in which the flange portion 12 is formed on the upper portion of the base 2 has been described. However, the present invention is not limited thereto, and the flange portion 12 may not be formed on the upper portion of the base 2.

  In the above-described embodiment, the example in which the concave portion 23 is formed in the protruding portion 4b of the LED substrate 4 is shown. However, the present invention is not limited to this, and the tip of the protruding portion 4b is not formed without forming the concave portion 23 in the protruding portion 4b. The outer surface of the base 2 may be connected by solder 17.

  In the above embodiment, the example in which the LED substrate 4 and the outer surface of the base 2 are connected by the solder 17 has been shown. However, the present invention is not limited thereto, and the metal piece is in contact with the LED substrate 4 and the outer surface of the base 2. You may make it fix by means, such as an adhesive agent.

  In the above embodiment, the projection 13 is formed on the outer surface of the base 2 and the projection 13 is held by a device such as a socket. However, the present invention is not limited to this. It is possible to adopt a configuration in which a male screw portion is formed on the outer peripheral surface of the two and this male screw portion is screwed into a female screw portion of a device such as a socket.

  In the above embodiment, the example in which the two terminal portions 11 are formed on the bottom portion of the base 2 has been shown. However, the present invention is not limited thereto, and one terminal portion 11 is provided on the bottom portion of the base 2, and the side wall portion of the base 2 is You may employ | adopt the structure made to become another terminal.

  The LED lamp according to the present invention is also applicable to a so-called wedge bulb type. In this case, the base 2 is not cylindrical, but is formed in a flat cylindrical shape corresponding to the shape of the base of the LED bulb.

  DESCRIPTION OF SYMBOLS 1 ... LED lamp, 2 ... Base, 3 ... LED element, 4 ... LED board, 4a ... Center part, 4b ... Projection part, 5 ... Control board, 5a ... Projection part, 6 ... Lens member, 7 ... Connection member, 11 ... Terminal part, 12 ... Flange part, 13 ... Projection part, 14 ... Communication port, 15 ... Heat transfer pattern, 16 ... Connection part, 17 ... Solder, 19 ... IC chip, 20 ... Electrode, 21 ... Lens part, 21a ... Recessed part, 22 ... Connection part, 23 ... Recessed part, 24 ... Projection part, 31 ... Main body part, 32a to 32d ... Projection part, 33 ... Projection part, 34 ... Recessed part, 34a ... Side edge part, 35 ... Projection part, 36 ... Hole 41 ... Tool 42 ... Through hole 43 ... Projection

Claims (3)

There is a base having a terminal portion, a lens member, a connecting member that connects the base and the lens member, and an LED substrate on which the LED element is provided, and a storage space in which the LED substrate is stored by at least the base and the connecting member. An LED lamp formed,
A communication port is formed between the base and the connecting member so as to communicate the storage space and the external space. A part of the LED substrate protrudes from the communication port, and the outer surface of the base and the LED substrate are connected to each other. An LED lamp characterized in that a part thereof is connected by a heat conductive member.   The LED lamp according to claim 1, wherein the heat conductive member is a metal. The connecting member has a protrusion that is inserted into the base and protrudes so as to overlap the wall of the base;
The projecting portion is configured in a plate shape and has a through hole penetrating in the plate thickness direction.
The base has a hole penetrating the wall portion from the outer surface toward the inner surface, and the hole has a protrusion formed on the edge thereof,
3. The LED lamp according to claim 1, wherein the protrusion of the base is inserted into a hole formed in the protruding portion of the connecting member so that the connecting member and the base are connected.

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