JP2015011916A - Led bulb - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED bulb which improves the mechanical strength while maintaining the heat radiation efficiency.SOLUTION: An LED bulb 1 according to the invention includes a heat radiation part 3 which has an opening at the tip side, houses an LED element 21, and has a container shape. The heat radiation part 3 includes: multiple fins 32 protruding outward; and multiple reinforcement fins 33, 34 which protrude outward and are formed so as to be thicker than the fins 32.

Description

  The present invention relates to an LED light bulb including a container-like heat radiating unit that houses an LED (Light Emitting Diode) element.

  2. Description of the Related Art Conventionally, as an LED bulb, an LED bulb including a container-like heat radiating unit that houses an LED element is known (for example, Patent Document 1). The heat radiating portion includes a plurality of fins protruding outward, and the heat generated from the LED elements is released to the outside by the plurality of fins.

  By the way, the plurality of fins according to Patent Document 1 are formed with a reduced thickness in order to improve the efficiency (heat radiation efficiency) for releasing the heat of the LED element. However, such a thin fin is inferior in strength (mechanical strength) against an external force and easily damaged.

JP2013-55055A

  Therefore, in view of such circumstances, an object of the present invention is to provide an LED bulb that improves mechanical strength while maintaining heat dissipation efficiency.

  The LED light bulb according to the present invention has an opening on the tip side, and includes a container-like heat radiating portion that accommodates the LED element, and the heat radiating portion is directed outward with a plurality of fins protruding outward. And a plurality of reinforcing fins that are thicker than the fins.

  According to the LED bulb according to the present invention, a plurality of fins protrude outwardly in the container-shaped heat radiation portion that houses the LED element. Thereby, the heat | fever emitted from a LED element can be discharge | released outside. In addition, a plurality of reinforcing fins, which are formed to be thicker than the fins, protrude outward from the heat dissipation portion. Thereby, the intensity | strength with respect to an external force can be reinforced. Therefore, the mechanical strength is improved while the heat dissipation efficiency is maintained.

  In addition, the LED bulb according to the present invention accommodates a power supply unit that supplies power to the LED element, and a power supply case disposed on the base end side of the heat dissipation unit, and the power supply case to be fixed to the heat dissipation unit. A convex power supply case fixing body that engages with the power supply case in a state of being inserted into the heat dissipation part, and the heat dissipation part has the plurality of fins and the plurality of reinforcing fins protruding from an outer peripheral part. A cylindrical case body; and an insertion hole portion that is inserted into the power supply case fixing body, wherein the insertion hole portion is at least partially disposed in the case body, and the reinforcing fin includes the insertion hole portion. The structure of adjoining so that it may pinch | interpose may be sufficient.

  According to such a configuration, the power supply case that houses the power supply unit that supplies power to the LED elements is disposed on the proximal end side of the heat dissipation unit. And a power supply case is fixed to a thermal radiation part by engaging with a power supply case in the state by which a convex power supply case fixing body is penetrated by the thermal radiation part. The power supply case fixing body is inserted through the insertion hole portion of the heat radiating portion.

  And at least one part of the insertion hole part is arrange | positioned at the cylindrical case main body from which a several fin and several reinforcement fin protrude from an outer peripheral part. Thereby, since the radial dimension of the plurality of fins and the plurality of reinforcing fins can be ensured, heat dissipation efficiency can be maintained, and moreover, at least a part of the insertion hole portion is disposed in the case body, The size of the direction can be reduced.

  Further, the reinforcing fins are adjacent to each other so as to sandwich the insertion hole portion in the circumferential direction. Thereby, a reinforcement fin reinforces the part in which mechanical strength falls by providing an insertion hole part. Therefore, it is possible not only to reduce the size in the radial direction while maintaining the heat radiation efficiency, but also to improve the mechanical strength.

  Moreover, in the LED bulb according to the present invention, the case main body may be configured such that a slit is formed between the reinforcing fins sandwiching the insertion hole portion.

  According to such a configuration, the case body is formed with slits between the reinforcing fins sandwiching the insertion hole. Thereby, since the slit is let to pass through the inside and the outside of the heat radiating portion, the heat generated from the LED element is directly emitted to the outside through the slit. And the fall of mechanical strength can be suppressed by providing a slit between the reinforcement fins which are improving the mechanical strength. Therefore, the heat dissipation efficiency can be effectively improved while maintaining the mechanical strength.

  The LED bulb according to the present invention includes a cover that covers a front end side of the heat radiating portion, and a convex cover fixing body that engages with the heat radiating portion in order to fix the cover to the heat radiating portion, The heat dissipating part includes a cylindrical case body in which the plurality of fins and the plurality of reinforcing fins protrude from an outer peripheral part, and a concave engaging part that engages with the cover fixing body. The structure may be such that at least a part is disposed in the case body, and the reinforcing fins are adjacent to each other so as to sandwich the engaging portion in the circumferential direction.

  According to such a structure, the cover which covers the front end side of a heat radiating part is fixed to a heat radiating part by a convex cover fixing body engaging with the concave engaging part of a heat radiating part. And at least one part of an engaging part is arrange | positioned at the cylindrical case main body from which a several fin and several reinforcement fin protrude from an outer peripheral part. Thereby, since the radial dimension of the plurality of fins and the plurality of reinforcing fins can be ensured, the heat dissipation efficiency can be maintained, and moreover, at least a part of the engaging portion is disposed on the case main body. The size of the direction can be reduced.

  Further, the reinforcing fins are adjacent to each other so as to sandwich the engaging portion in the circumferential direction. Thereby, a reinforcement fin reinforces the part where mechanical strength falls by providing an engaging part. Therefore, it is possible not only to reduce the size in the radial direction while maintaining the heat radiation efficiency, but also to improve the mechanical strength.

  In the LED bulb according to the present invention, the plurality of reinforcing fins may be arranged so that the heat radiating portion has a rotationally symmetric shape.

  According to such a configuration, the heat radiating portion has a rotationally symmetric shape by arranging the plurality of reinforcing fins at predetermined positions. This improves the balance between heat dissipation efficiency and mechanical strength.

  As described above, the LED bulb according to the present invention has an excellent effect of improving mechanical strength while maintaining heat dissipation efficiency.

FIG. 1 is an overall perspective view of an LED bulb according to an embodiment of the present invention. FIG. 2 is an overall view of the LED bulb according to the embodiment, and shows a cross-sectional view of a main part taken along line II-II in FIG. FIG. 3 is an overall plan view of the heat radiating unit according to the embodiment. FIG. 4 is an overall perspective view of the heat radiating unit according to the embodiment.

  Hereinafter, an embodiment of the LED bulb according to the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the LED bulb 1 according to the present embodiment has a light source part 2 having a light emitting LED element 21 and a container shape having an opening on the tip side and accommodating the light source part 2 therein. The heat radiating part 3 and the cover 4 covering the tip side of the heat radiating part 3 are provided. The LED bulb 1 includes a power supply unit 5 that supplies power to the LED element 21 and a power supply case 6 that houses the power supply unit 5 and is disposed on the proximal end side of the heat dissipation unit 3.

  The LED bulb 1 includes a convex cover fixing body 7 that engages with the heat radiating unit 3 in order to fix the cover 4 to the heat radiating unit 3. The LED bulb 1 includes a convex light source fixing body 8 that engages with the heat radiating unit 3 in order to fix the light source unit 2 to the heat radiating unit 3. The LED bulb 1 includes a convex power supply case fixing body 9 that engages with the power supply case 6 while being inserted through the heat dissipation part 3 in order to fix the power supply case 6 to the heat dissipation part 3. In this embodiment, each fixed body 7, 8, 9 is a long male screw material.

  The light source unit 2 includes an LED substrate unit 22 on which the LED element 21 is mounted. The LED board portion 22 includes a hole 22 a that is inserted into the light source fixing body 8. The LED board portion 22 includes a recess 22 b that engages with the cover 4. The LED substrate unit 22 conducts heat generated from the LED element 21 to the heat radiating unit 3. In this embodiment, the LED board part 22 is formed with the metal (for example, aluminum).

  As shown in FIGS. 3 and 4, the heat radiating unit 3 includes a cylindrical case body 31 and a plurality of fins 32 that protrude outward from the outer periphery of the case body 31. The heat radiating portion 3 protrudes outward from the outer peripheral portion of the case main body 31 and has a plurality of first reinforcing fins 33 that are formed thicker than the fins 32, and outward from the outer peripheral portion of the case main body 31. A plurality of second reinforcing fins 34 protruding and having a thickness larger than that of the fins 32 and thinner than the first reinforcing fins 33 are provided.

  The heat radiating part 3 includes a support part 35 that protrudes inward in the radial direction from the inner peripheral part of the case body 31 and supports the light source part 2 and the power supply case 6 in the axial direction. The heat radiating portion 3 is inserted into the concave first engaging portion 36 that engages with the cover fixing body 7, the concave second engaging portion 37 that engages with the light source fixing body 8, and the power supply case fixing body 9. And an insertion hole 38. In the present embodiment, the heat radiating part 3 is formed of metal (for example, aluminum).

  The fins 32 and the reinforcing fins 33 and 34 protrude radially outward from the outer peripheral portion of the case body 31. The fin 32 and the reinforcing fins 33 and 34 are formed to bend in the same direction. The radial protrusion amount of the fin 32 and the reinforcing fins 33 and 34 from the case main body 31 increases from the base end side to the front end side in the axial direction. Thereby, the thermal radiation part 3 is formed so that an outer diameter may expand toward the front end side of an axial direction.

  On the distal end side of the heat radiating portion 3, the radial protrusion amount of the fin 32 and the reinforcing fins 33 and 34 from the case body 31 is substantially the same as the radial thickness of the case body 31. The plurality of reinforcing fins 33 and 34 are respectively arranged so that the heat radiating portion 3 has a rotationally symmetric shape about the axial direction. In the present embodiment, six each of the reinforcing fins 33 and 34 are provided.

  The first reinforcing fins 33 are adjacent to each other so as to sandwich the insertion hole 38 in the circumferential direction. The case body 31 has a slit 31 a formed between the first reinforcing fins 33 and 33 and allowing the inside and outside of the heat radiating portion 3 to pass therethrough. The thickness of the first reinforcing fins 33 is set to 2.0 times to 2.5 times the thickness of the fins 32. The second reinforcing fins 34 are adjacent to each other so as to sandwich the first engaging portion 36 in the circumferential direction. The thickness of the second reinforcing fin 34 is set to 1.3 times to 1.7 times the thickness of the fin 32.

  A part of the first engaging portion 36 is disposed on the case main body 31. Specifically, a part of the first engagement portion 36 is disposed on the outer peripheral portion of the case main body 31. The first engaging portion 36 is formed in a concave shape along the axial direction. The first engaging portion 36 is a female screw that is screwed into the cover fixing body 7.

  The second engagement portion 37 is disposed on the inner peripheral portion of the support portion 35. The second engaging portion 37 is a female screw that is screwed into the light source fixing body 8. A part of the insertion hole 38 is disposed in the case main body 31. Specifically, a part of the insertion hole portion 38 is disposed on the inner peripheral portion of the case main body 31. The insertion hole 38 is formed in a concave shape along the axial direction.

  Returning to FIG. 2, the cover 4 includes a flat cover portion 41 that covers the opening on the distal end side of the heat radiating portion 3, and an optical system 42 on which the light of the LED element 21 is incident. The cover 4 includes a convex portion 43 that engages with the concave portion 22 b of the LED substrate portion 22, and a hole 44 that is inserted through the cover fixing body 7. The cover 4 is formed with translucency. In the present embodiment, the cover 4 is made of a translucent resin such as polycarbonate or acrylic resin.

  The optical system 42 protrudes from the cover portion 41 toward the base end side in the axial direction. In the optical system 42, semi-elliptical lenses having the optical axis of the LED element 21 as a major axis are arranged in parallel. The convex portion 43 projects from the cover portion 41 toward the base end side, and engages with the concave portion 22b of the LED board portion 22 at the end portion. Thereby, the optical system 42 is positioned with respect to the LED element 21.

  The power supply case 6 includes a third engagement portion 61 that engages with the power supply case fixing body 9. The third engaging portion 61 is a female screw that is screwed into the power supply case fixing body 9. In the present embodiment, the power supply case 6 is made of metal (for example, aluminum).

  The cover fixing body 7 fixes the cover 4 to the heat radiating portion 3 by engaging with the first engaging portion 36 of the heat radiating portion 3 while being inserted through the hole 44 of the cover 4. The light source fixing body 8 fixes the LED substrate portion 22 to the heat dissipation portion 3 by engaging with the second engagement portion 37 of the heat dissipation portion 3 while being inserted through the hole 22a of the LED substrate portion 22. The power supply case fixing body 9 fixes the power supply case 6 to the heat radiating part 3 by engaging with the third engaging part 61 of the power supply case 6 while being inserted through the insertion hole 38 of the heat radiating part 3. .

  As described above, according to the LED light bulb 1 according to the present embodiment, the plurality of fins 32 protrude outward in the container-shaped heat radiation portion 3 that houses the LED elements 21. Thereby, the heat emitted from the LED element 21 can be released to the outside. In addition, a plurality of first and second reinforcing fins 33 and 34 that are formed to be thicker than the fins 32 protrude outward from the heat radiating portion 3. Thereby, the intensity | strength with respect to an external force can be reinforced. Therefore, the mechanical strength is improved while the heat dissipation efficiency is maintained.

  In addition, according to the LED bulb 1 according to the present embodiment, the power supply case 6 that houses the power supply unit 5 that supplies power to the LED element 21 is disposed on the proximal end side of the heat dissipation unit 3. Then, the power supply case 6 is fixed to the heat dissipation part 3 by engaging the power supply case 6 with the convex power supply case fixing body 9 inserted into the heat dissipation part 3. The power supply case fixing body 9 is inserted into the insertion hole 38 of the heat radiating unit 3.

  A part of the insertion hole 38 is disposed in a cylindrical case body 31 from which the plurality of fins 32 and the plurality of reinforcing fins 33 and 34 protrude from the outer peripheral portion. Thereby, since the radial dimension of the plurality of fins 32 and the plurality of reinforcing fins 33 and 34 can be ensured, heat dissipation efficiency can be maintained. Moreover, for example, compared to a configuration in which the insertion hole 38 is disposed on the inner side of the case main body 31, a part of the insertion hole 38 according to the present embodiment is disposed in the case main body 31. The size of the direction is reduced.

  Further, according to the LED bulb 1 according to the present embodiment, the first reinforcing fins 33 that are thicker than the fins 32 are adjacent to each other so as to sandwich the insertion hole 38 in the circumferential direction. Thereby, the 1st reinforcement fin 33 is reinforcing the part by which the mechanical strength falls by providing the insertion hole part 38. FIG.

  On the other hand, for example, in the case where the thin fins 32 are adjacent to each other so as to sandwich the insertion hole 38 in the circumferential direction, the thickness of the case body 31 in the radial direction is set to ensure mechanical strength. It needs to be thicker. In that case, in order to maintain the outer diameter of the heat radiating part 3 constant, it is necessary to reduce the radial dimension of each fin 32, and thus the heat radiation efficiency is lowered. Therefore, according to the LED bulb 1 according to the present embodiment, not only the radial size can be reduced while maintaining the heat radiation efficiency, but also the mechanical strength can be improved.

  Further, according to the LED bulb 1 according to the present embodiment, the case body 31 is formed with the slits 31 a between the first reinforcing fins 33 and 33 that sandwich the insertion hole 38. Thereby, since the slit 31a is made to pass through the inside and the outside of the heat radiating part 3, the heat generated from the LED element 21 is directly emitted to the outside through the slit 31a. And the fall of mechanical strength can be suppressed by providing the slit 31a between the 1st reinforcement fins 33 and 33 which are improving the mechanical strength. Therefore, the heat dissipation efficiency can be effectively improved while maintaining the mechanical strength.

  Further, according to the LED bulb 1 according to the present embodiment, the cover that covers the distal end side of the heat radiating part 3 by the convex cover fixing body 7 engaging with the concave first engaging part 36 of the heat radiating part 3. 4 is fixed to the heat radiating part 3. A part of the first engaging portion 36 is disposed in a cylindrical case body 31 in which the plurality of fins 32 and the plurality of reinforcing fins 33 and 34 protrude from the outer peripheral portion.

  Thereby, since the radial dimension of the plurality of fins 32 and the plurality of reinforcing fins 33 and 34 can be ensured, heat dissipation efficiency can be maintained. In addition, for example, a part of the first engagement portion 36 according to the present embodiment is disposed in the case main body 31 as compared with the configuration in which the first engagement portion 36 is disposed outside the case main body 31. Therefore, the radial size can be reduced.

  Further, according to the LED bulb 1 according to the present embodiment, the second reinforcing fins 34 that are thicker than the fins 32 are adjacent to each other so as to sandwich the first engaging portion 36 in the circumferential direction. Thereby, the 2nd reinforcement fin 34 reinforces the part in which mechanical strength falls by providing the 1st engaging part 36. FIG.

  On the other hand, for example, in the case of a configuration in which the thin fin 32 is adjacent to the first engaging portion 36 so as to be sandwiched in the circumferential direction, the radial direction of the case body 31 is secured in order to ensure mechanical strength. It is necessary to further increase the thickness. In that case, in order to maintain the outer diameter of the heat radiating part 3 constant, it is necessary to reduce the radial dimension of each fin 32, and thus the heat radiation efficiency is lowered. Therefore, according to the LED bulb 1 according to the present embodiment, not only the radial size can be reduced while maintaining the heat radiation efficiency, but also the mechanical strength can be improved.

  Moreover, according to the LED bulb 1 according to the present embodiment, the heat radiating portion 3 has a rotationally symmetric shape by arranging the plurality of reinforcing fins 33 and 34 at predetermined positions. This improves the balance between heat dissipation efficiency and mechanical strength.

  The LED bulb according to the present invention is not limited to the configuration of the above-described embodiment, and is not limited to the above-described effects. In addition, it goes without saying that the LED bulb according to the present invention can be variously modified without departing from the gist of the present invention. For example, it is needless to say that configurations, methods, and the like according to various modifications described below may be arbitrarily selected and employed in the configurations, methods, and the like according to the above-described embodiments.

  In the LED light bulb 1 according to the embodiment, a part of the insertion hole 38 is disposed in the case main body 31. However, the LED bulb 1 according to the present invention is not limited to such a configuration. For example, the LED bulb 1 according to the present invention may have a configuration in which the entire insertion hole 38 is disposed in the case body 31. The configuration in which at least a part of the insertion hole 38 is disposed in the case main body 31 is not an essential configuration in the present invention.

  Moreover, in the LED bulb 1 according to the above-described embodiment, a part of the first engaging portion 36 is disposed on the case main body 31. However, the LED bulb 1 according to the present invention is not limited to such a configuration. For example, the LED bulb 1 according to the present invention may have a configuration in which the entire first engaging portion 36 is disposed in the case main body 31. In addition, the structure that at least one part of the 1st engaging part 36 is arrange | positioned at the case main body 31 is not an essential structure in this invention.

  In the LED bulb 1 according to the above-described embodiment, six first reinforcing fins 33 are provided and are adjacent to each other so as to sandwich the insertion hole 38 in the circumferential direction. However, the LED bulb 1 according to the present invention is not limited to such a configuration. For example, in the LED bulb 1 according to the present invention, the number and arrangement of the first reinforcing fins 33 are not particularly limited.

  In the LED bulb 1 according to the embodiment, six second reinforcing fins 34 are provided and are adjacent to each other so as to sandwich the first engagement portion 36 in the circumferential direction. However, the LED bulb 1 according to the present invention is not limited to such a configuration. For example, in the LED bulb 1 according to the present invention, the number and arrangement of the second reinforcing fins 34 are not particularly limited.

  Moreover, in the LED bulb 1 according to the embodiment, the first reinforcing fin 33 and the second reinforcing fin 34 are provided. However, the LED bulb 1 according to the present invention is not limited to such a configuration. For example, the LED bulb 1 according to the present invention may have a configuration in which only one of the first reinforcing fins 33 and the second reinforcing fins 34 is provided, or three or more reinforcing fins having different thicknesses are provided. It may be configured to be.

  Moreover, in the LED bulb 1 according to the above embodiment, each of the fixed bodies 7, 8, and 9 is a male screw material. However, the LED bulb 1 according to the present invention is not limited to such a configuration. For example, in the LED bulb 1 according to the present invention, the cover fixing body 7 protrudes from the cover portion 41 toward the proximal end side in the axial direction, and fits with the concave first engagement portion 36 of the heat dissipation portion 3. It may be configured as follows.

  In short, the cover fixing body 7 may have any configuration as long as the cover 4 can be fixed to the heat radiating portion 3, and the light source fixing body 8 may have any configuration as long as the light source portion 2 can be fixed to the heat radiating portion 3. The power supply case fixing body 9 may have any configuration as long as the power supply case 6 can be fixed to the heat radiating portion 3, and is not particularly limited.

  Moreover, in the LED bulb 1 according to the present invention, the material of each component is not particularly limited to the material of each component according to the above embodiment.

  DESCRIPTION OF SYMBOLS 1 ... LED bulb, 2 ... Light source part, 3 ... Radiation part, 4 ... Cover, 5 ... Power supply part, 6 ... Power supply case, 7 ... Cover fixing body, 8 ... Light source fixing body, 9 ... Power supply case fixing body, 21 ... LED element 22 ... LED substrate portion 22a ... hole 22b ... recessed portion 31 ... case body 31a ... slit 32 ... fins 33 ... first reinforcing fins 34 ... second reinforcing fins 35 ... supporting portions 36 ... 1st engagement part, 37 ... 2nd engagement part, 38 ... Insertion hole part, 41 ... Cover part, 42 ... Optical system, 43 ... Convex part, 44 ... Hole, 61 ... 3rd engagement part

Claims (5)

It has an opening on the tip side, and is equipped with a container-like heat dissipation part that houses the LED element,
The heat radiation part is an LED bulb including a plurality of fins protruding outward and a plurality of reinforcing fins protruding outward and having a thickness larger than that of the fins. A power supply case that houses a power supply unit that supplies power to the LED element and is disposed on the base end side of the heat dissipation unit;
In order to fix the power supply case to the heat dissipation part, a convex power supply case fixing body that engages with the power supply case in a state of being inserted through the heat dissipation part,
The heat dissipating part includes a cylindrical case body in which the plurality of fins and the plurality of reinforcing fins protrude from an outer peripheral part, and an insertion hole part to be inserted into the power supply case fixing body,
The insertion hole is at least partially disposed in the case body,
The LED light bulb according to claim 1, wherein the reinforcing fins are adjacent to each other so as to sandwich the insertion hole portion in the circumferential direction.   The LED bulb according to claim 2, wherein the case body forms a slit between the reinforcing fins sandwiching the insertion hole. A cover that covers the front end side of the heat dissipation part;
In order to fix the cover to the heat dissipation part, a convex cover fixing body engaged with the heat dissipation part,
The heat dissipating part includes a cylindrical case body from which the plurality of fins and the plurality of reinforcing fins protrude from an outer peripheral part, and a concave engaging part that engages with the cover fixing body,
The engaging portion is disposed at least partially on the case body,
The LED light bulb according to claim 1, wherein the reinforcing fins are adjacent to each other so as to sandwich the engaging portion in a circumferential direction.   The LED light bulb according to any one of claims 1 to 4, wherein the plurality of reinforcing fins are arranged so that the heat radiation portion has a rotationally symmetric shape.

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