KR20120028534A - Led lamp provided an improved capability of discharging heat - Google Patents

Abstract

PURPOSE: An LED bulb is provided to rapidly discharge heat to the outside by forming a plurality of heat radiation fins on a heat sink and a vent between the heat radiation fins. CONSTITUTION: A light emitting unit(110) is formed on a substrate(111) with an LED(113). An electric connection unit(170) is formed to supply power to the light emitting unit. A first heat radiation unit(130) includes a first heat radiation unit with a vent. The vent is comprised of a top vent(1359) and a bottom vent(1316).

Description

LED bulb provided an improved capability of discharging heat}

The present invention relates to an LED bulb having improved heat dissipation, and more particularly, LED bulbs having a plurality of heat dissipation fins formed on a heat dissipation plate to efficiently dissipate heat generated from the LED bulbs, and having ventilation holes formed between the heat dissipation fins. It is about.

In general, white light sources using LEDs have been spotlighted as new lighting sources because of their excellent luminous efficiency, high luminous intensity, high speed response and long life.

For example, 40-60W incandescent bulbs can be replaced with 5 ~ 10W of power using about 1W LED 6EA, and 100W incandescent bulbs can achieve the same illumination with about 13W of power using 1W LED 10EA. have. Therefore, much less power is consumed to achieve the same illumination environment than incandescent lamps and fluorescent lamps.

However, a lighting LED having the above characteristics generates a lot of heat in the process of converting electrical energy into light, and this heat not only reduces the light emitting characteristics of the LED, but also acts as a factor of shortening the life of the LED. There was this.

The present invention has been made to solve the above problems, to form a plurality of heat dissipation fins on the heat sink in order to efficiently dissipate heat generated from the LED bulb, and through the heat transfer fins by forming a ventilation hole between the heat dissipation fins and It is to provide an LED bulb with improved heat dissipation that allows heat to be dissipated quickly by conducting convection heat simultaneously.

LED bulbs that improve the heat dissipation function of the present invention for achieving the above object is provided with a light emitting unit having a substrate on which the LED is mounted, an electrical connection unit for supplying electricity to the light emitting unit and between the light emitting unit and the electrical connection unit It is made of a heat dissipation unit formed with at least one vent hole in the longitudinal direction.

The heat dissipation part may include a hollow inner heat dissipation part having a lower end extending outwardly inclined, and an outer heat dissipation part inserted into the inner heat dissipation part and extended downward inclined outward so as to form the vent hole between the inner heat dissipation part.

The inner heat dissipation part is provided in the hollow inner pillar part and the lower part of the inner pillar part, and the inner heat dissipation plate part having an outer diameter increases toward the lower side, the support pin radially protruding from the outer circumferential surface of the inner heat dissipation plate part, and the support pin and the support pin. Consisting of the radiation fins provided radially protruding in the lower portion of the inner circumferential surface of the inner heat dissipating plate portion, the concave fixing groove may be formed in the upper portion of the inner heat dissipating plate portion.

The outer heat dissipating portion is provided in a plurality of hollow outer column, the outer circumferential surface of the outer column at equal intervals, the outer heat dissipating plate portion formed in the lower portion extending in the direction of increasing the outer diameter and the fixing on both sides of the inner side of the outer heat dissipating plate portion; It may be made of a fixing tab provided to correspond to the groove.

The vent may be an upper vent formed between the outer heat dissipating plate part and the outer column, and a lower vent formed between the inner heat dissipating plate part 1313 and the outer heat dissipating plate part, and the upper vent and the lower vent may be communicated with each other.

An upper end of the outer heat dissipation plate part may extend to an upper portion of the outer column part.

A support groove may be formed in an outer pillar portion between the outer heat sink portion and the outer heat sink portion.

When the outer heat dissipation part is stacked on the inner heat dissipation part, the inner column part is inserted into the outer heat part to contact the inner heat dissipation plate part and the outer column part, and the support pin is inserted between the outer heat dissipation plate part and the outer heat dissipation part, The heat dissipation fin may contact the outer heat dissipation plate to form a lower vent hole between the outer heat dissipation plate.

The support pin is formed to extend from the upper end to the lower end of the inner heat dissipation plate, the heat dissipation fin may be formed in a different length than the support pin.

In addition, the LED bulb to improve the heat dissipation function of the present invention for achieving the above object, a light emitting unit having a substrate mounted with an LED, an electrical connection for supplying electricity to the light emitting unit and between the light emitting unit and the electrical connection And a second inner heat dissipation part formed at a lower end of the second inner heat dissipation part, and being integrally spaced apart from the outer circumferential surface of the second inner heat dissipation part in a radially outer direction, and having a lower end extending outwardly inclined. 2 is configured to include a second heat dissipation portion consisting of a plurality of second outer heat dissipation portions having a space on the outer circumferential surface of the inner heat dissipation portion.

On the outer circumferential surface of the second inner heat dissipating portion, a second heat dissipating fin radially protruding and a second support pin protruding radially on the outer circumferential surface of the second inner heat dissipating portion between the second heat dissipating fin and the second heat dissipating fin are provided. The heat dissipation part may be in a state spaced apart from the second inner heat dissipation part by the second support pin and the second heat dissipation pin.

A heat dissipation groove 1355a having a concave shape in the longitudinal direction may be formed in the second outer heat dissipation portion between the second support pin and the second heat dissipation fin.

According to the LED bulb improved the heat dissipation function of the present invention as described above, in order to efficiently dissipate heat generated by the LED bulb, a plurality of heat dissipation fins are formed on the heat dissipation, and a conductive method by forming a vent between the heat dissipation fins The heat transfer by the convection method and the heat transfer by the convection method at the same time to exert heat to the outside can be exerted.

1 is a perspective view showing an LED bulb with improved heat radiation according to a first embodiment of the present invention,
2 is an exploded perspective view illustrating a coupling process of an LED bulb having improved heat radiation according to a first embodiment of the present invention;
3 is a cross-sectional view for explaining the interior of the LED bulb with improved heat dissipation function according to a first embodiment of the present invention,
4 and 5 are perspective views illustrating the coupling process of the first heat dissipation unit according to the first embodiment of the present invention,
6 is a perspective view showing a first heat dissipation unit according to a first embodiment of the present invention;
FIG. 7 is a bottom view illustrating a bottom surface of the first heat radiating part of FIG. 6.
FIG. 8 is a plan view illustrating an upper surface of the first heat radiating part of FIG. 6;
9 is a cross-sectional view showing the flow of heat in the LED bulb with improved heat dissipation function according to the first embodiment of the present invention,
10 and 11 are perspective views illustrating a second heat dissipation unit according to a second embodiment of the present invention;
12 is a bottom view of the bottom surface of the second heat dissipation unit;
13 is a plan view illustrating an upper surface of the second heat radiating unit.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

1 is a perspective view illustrating an LED bulb with improved heat dissipation according to a first embodiment of the present invention, and FIG. 2 illustrates a coupling process of an LED bulb with improved heat dissipation according to a first embodiment of the present invention. Figure 3 is an exploded perspective view shown for the purpose, Figure 3 is a cross-sectional view for explaining the interior of the LED bulb with improved heat dissipation function according to a first embodiment of the present invention.

In the following description, the vertical direction of FIG. 3 is referred to as a “length direction”, and the horizontal direction of FIG. 3 is referred to as a “radial direction”. In FIG. The bottom, the direction of the electrical connection 170 is described as the top.

As shown in FIGS. 1 to 3, the LED bulb 100 having the improved heat dissipation function according to the first embodiment of the present invention radiates heat generated from the light emitting unit 110 and the light emitting unit 110. To the first heat dissipation unit 130 provided on the upper portion of the light emitting unit 110 and the electrical connection unit 170 is provided on the first heat dissipating unit 130 to supply power to the light emitting unit 110 Is done.

As illustrated in FIGS. 2 and 3, the light emitting unit 110 is mounted on a surface of a substantially disk-shaped substrate 111 in a plurality of LEDs 113 in a predetermined arrangement, and the substrate 111 and the LED 113. Can be done by covering with a globe (115).

The substrate 111 is preferably made of a material having excellent thermal conductivity, for example, a plate material of aluminum, copper, iron, or an alloy thereof. In addition, the substrate 111 is provided to be spaced apart from the inner circumferential surface of the glove 115 to prevent the high temperature heat is transferred directly to the glove 115.

The substrate 111 has a plurality of through holes 1113 through which fastening means (not shown), such as bolts and screws, are formed, and fastening holes 173 in the insulating portion 171 of the electrical connection portion 170 to be described later. It can be coupled to the electrical connection 170 through the fastening means.

The globe 115 is formed in a substantially semi-spherical shape with one side open, and the open portion of the first heat dissipation unit 130 is blocked so that foreign matter is introduced into the light emitting unit 110 by casing the LED 113. In contact with the bottom is combined.

The globe 115 may be made of a transparent or translucent plastic material and emits light emitted from the LED 113 to the outside of the globe 115.

4 and 5 are perspective views illustrating a coupling process of the first heat dissipation unit according to the first embodiment of the present invention, and FIG. 6 is a perspective view showing the first heat dissipation unit according to the first embodiment of the present invention. 7 is a bottom view illustrating the bottom surface of the first heat dissipation unit of FIG. 6, and FIG. 8 is a plan view illustrating the top surface of the first heat dissipation unit of FIG. 6.

As shown in FIGS. 4 and 5, the first heat dissipation unit 130 includes a first inner heat dissipation unit 131 disposed above the light emitting unit 110 and an outer side of the first inner heat dissipation unit 131. The first outer heat dissipating part 135 is stacked.

The first inner heat dissipation part 131 is provided with a hollow inner pillar portion 1311 and a lower portion of the inner pillar portion 1311, and is formed of a hollow inner heat dissipation plate portion 1313 which is inclined toward the bottom to increase an outer diameter. In addition, a plurality of first support pins 1315 protruding radially from the inner circumferential surface of the inner heat dissipation plate part 1313 are provided at intervals.

In addition, a plurality of first heat radiating fins 1319 protruding radially under the outer circumferential surface of the inner heat radiating plate part 1313 between the first support pins 1315 and the first support pins 1315 are provided at equal intervals.

In addition, a plurality of fixing recesses 1312 concave in the longitudinal direction are formed in an upper portion of the inner heat dissipation plate part 1313 between the first support pins 1315 and the first support pins 1315.

The first support pin 1315 extends from an upper end to a lower end of the inner heat dissipation plate part 1313, and the first heat dissipation pin 1319 may be provided to have a different length from the first support pin 1315. It is preferably provided with a shorter length than the first support pin 1315.

The first outer heat dissipation part 135 includes a hollow outer column part 1351 and an outer heat dissipation plate part 1353 provided on an outer circumferential surface of the outer column part 1315, and a lower portion of the outer heat dissipation part 1353. Is inclined toward the bottom to increase the outer diameter, the outer heat sink portion 1353 is provided with a plurality in the circumferential direction on the outer circumferential surface of the outer column (1351).

An upper end of the outer heat dissipation plate part 1353 is provided extending to an upper portion of the outer column part 1351, and an upper vent hole 1359 is longitudinally disposed between the outer heat dissipation plate part 1353 and the outer column part 1351. Is formed.

The lower end of the outer heat radiating plate part 1353 is provided extending to the lower part of the outer column part 1351.

In addition, support grooves 1355 are formed in the longitudinal direction 1135 between the outer heat radiating plate part 1353 and the outer heat radiating plate part 1353 in the longitudinal direction, and both side ends of the inner side of the outer heat radiating plate part 1353. A fixing tab 1352 inserted into the fixing groove 1312 is provided in the protrusion.

Here, the fixing tab 1352 is provided to protrude from a portion provided to extend below the outer column (1351).

In addition, the inner pillar 1311 is provided to be inserted into the outer pillar 1351.

Therefore, as shown in FIG. 6, the inner pillar portion 1311 may be inserted into the outer pillar portion 1351, and the first outer radiation portion 135 may be stacked on the first inner radiation portion 131. The inner pillar portion 1311 is inserted into the outer pillar portion 1351 to contact the upper end of the inner heat radiation plate portion 1313 and the lower end of the outer pillar portion 1351.

In addition, one or more first support pins 1315 of the plurality of first support pins 1315 are positioned between the outer heat sink plate part 1353 and the outer heat sink plate part 1353.

One or more of the first support pins 1315 and the first heat sink fins 1319 of the first support fins 1315 may be in contact with the inner side of the outer heat sink plate 1353.

Thus, as shown in FIG. 7, a lower vent hole 1316 is formed between the outer heat radiating plate part 1353.

Here, the lower vent hole 1316 and the upper vent hole 1347 shown in FIG. 8 are in communication with each other.

Since the first heat dissipation unit 130 is made of a material having good heat dissipation, that is, aluminum, it is possible to efficiently discharge heat emitted from the LED 113 and the substrate 111 to the outside.

In addition, as shown in FIG. 3, an upper portion of the glove 115 is inserted into the inner heat radiation plate part 1313 so that the first inner heat radiation part 131 roundly surrounds a part of the upper portion of the glove 115 from the outside. It is structured.

Therefore, since the area of the glove 115 that is in contact with the inner heat dissipation plate part 1313 is large, heat generated from the LED 113 and the substrate 111 can be sufficiently transmitted to the first heat dissipation part 130, and thus heat transfer. The effect will be greater.

As shown in FIGS. 2 and 3, the electrical connection unit 170 includes an insulation unit 171 provided on the upper portion of the first heat dissipation unit 130 and a terminal cap 175 connected to an external power source.

The insulator 171 is positioned between the terminal cap 175 and the first heat dissipation unit 130, and an electric wire inlet (not shown) is formed at the upper portion thereof to supply electricity from the terminal cap 175, and a substrate 111 at the lower portion thereof. Fastening hole 173 is coupled to the through hole 1113 of the).

The insulation unit 171 may be made of an insulation material such as ABS to prevent electricity supplied from the terminal cap 175 from being supplied to the first heat dissipation unit 130 and the substrate 111, which are metal materials.

The terminal cap 175 may be made of a metal material such as nickel (Ni), and may be coupled to an upper portion of the first heat dissipation part 130 through an insulating part 171 and screwed to a conventional socket (not shown). Formed.

Reference numeral 133 denotes a circuit board on which a driving circuit for driving the LED 113 is disposed, and may be provided inside the insulating unit 171.

Thus, the terminal cap 175 may be provided with (+) and (-) electrical contacts (not shown) connected to the wires to supply electricity to the circuit board 133.

9 is a cross-sectional view showing the flow of heat in the LED bulb with improved heat dissipation function according to the first embodiment of the present invention.

As described above, the LED bulb 100 is provided, and when the electricity is supplied to the substrate 111 by coupling the terminal cap 175 to the socket, the light emitting unit 110 emits light.

In this case, the LED 113 may include red, green, and blue LEDs 113, and the red, green, and blue LEDs 113 may be disposed in one unit to emit white light.

Subsequently, as light is emitted, heat is generated in the light emitting unit 110, that is, the LED 113 and the substrate 111, and transferred to the first heat radiating unit 130, and the outer circumferential surface of the first heat radiating unit 130 is Since it is exposed to the air, heat transferred from the light emitting unit 110 may be quickly discharged to the air through the first heat radiating unit 130.

In this case, the first support pins 1315 and the first heat radiation fins 1319 provided in the first inner heat radiation portion 131 are formed to protrude in a relationship with the inner heat radiation plate portion 1313.

Therefore, the heat dissipation area can be widened, so that heat generated in the light emitting unit 110 can be effectively transferred to the atmosphere through the heat conduction in the first heat dissipating unit 130.

On the other hand, as the first support pins 1315 and the first heat radiation fins 1319 are provided in the longitudinal direction, the conducted heat is conducted upward.

In addition, the lower vent hole (1316) and the upper vent hole (1359) is in communication with the hot air flows from the lower vent hole (1316) to the upper vent hole (1359) because the flow is formed in the vertical direction according to the natural convection flow While removing the heat absorbed by the first heat dissipation unit 130 can increase the heat dissipation effect.

10 and 11 are perspective views illustrating a second heat dissipation unit according to a second embodiment of the present invention, FIG. 12 is a bottom view of a bottom surface of the second heat dissipation unit, and FIG. 13 is a top view of the second heat dissipation unit. Top view.

The LED bulb having the improved heat dissipation function to which the second heat dissipating unit 130a is applied according to the second embodiment of the present invention has the same components as other components other than the first heat dissipating unit 130 in the first embodiment. Description of the description is omitted.

As shown in FIGS. 10 and 11, the second heat dissipating part 130a according to the second embodiment of the present invention has a hollow inner second heat dissipating part 131a, the lower end of which is inclined toward the lower part and the outer diameter thereof increases, The second outer heat dissipating part 135a is integrally provided on the outer circumferential surface of the second inner heat dissipating part 131a in a radially outer space.

On the outer circumferential surface of the second inner heat dissipation part 131a, a plurality of second heat dissipation fins 1319a protruding radially are provided integrally at intervals.

In addition, a second support pin 1315a radially protruding from an outer circumferential surface of the second inner heat dissipation part 131a between the second heat dissipation fin 1319a and the second heat dissipation fin 1319a is integrally provided. Therefore, two second heat radiation fins 1319a and one second support pin 1315a may be provided in one set.

The second outer heat dissipation unit 135a is integrally provided on the side surfaces of the second support fins 1315a and the second heat dissipation fins 1319a, and is formed by the second support fins 1315a and the second heat dissipation fins 1319a. It may be provided in a state spaced apart from the second inner heat radiation portion (131a).

The second outer heat dissipation part 135 has a lower end portion formed to be inclined outwardly, and is provided on the outer circumferential surface of the second inner heat dissipation part 131a at intervals in the circumferential direction.

10 to 13, heat dissipation grooves 1355a having a shape concave in the longitudinal direction are formed in the second outer heat dissipation portion 135a between the second support fins 1315a and the second heat dissipation fins 1319a. ) Is formed.

Since the second outer heat dissipation part 135a may be integrally provided at the sides of two second heat dissipation fins 1319a and one second support fin 1315a, two heat dissipation grooves 1355a may be formed. .

As described above, the second heat dissipation unit 130a according to the second embodiment of the present invention is provided between the light emitting unit 110 and the electrical connection unit 170, and the terminal cap 175 is coupled to the socket to form the substrate 111. When electricity is supplied to the light emitting unit 110, light is emitted.

Subsequently, as light is emitted, heat is generated in the light emitting unit 110, that is, the LED 113 and the substrate 111, and transferred to the second heat dissipating unit 130a, and an outer circumferential surface of the second heat dissipating unit 130a. Since the exposed state in the atmosphere, the heat transferred from the light emitting unit 110 can be quickly discharged to the atmosphere through the second heat radiating unit (130a).

At this time, the second support fins 1315a, the second heat dissipation fins 1319a, and the second outer heat dissipation portion 135a, which are integrally provided in the second inner heat dissipation portion 131a, have a relationship with the second inner heat dissipation portion 131a. Protrudes from.

Therefore, the heat dissipation area can be widened, so that heat generated from the light emitting unit 110 can be effectively transmitted to the atmosphere through the heat conduction in the second heat dissipating unit 130a.

On the other hand, as the second support pin 1315a, the second heat dissipation fin 1319a, and the second outer heat dissipation unit 135a are provided in the longitudinal direction, the conducted heat is conducted upward.

In addition, since the hot air flows up and down in accordance with the natural convection flow, as the air passes through the heat dissipation groove 1355a, the heat absorbed by the second heat dissipation part 130a may be removed to increase the heat dissipation effect.

In the above description, the present invention has been described with reference to preferred embodiments, but the present invention is not necessarily limited thereto, and a person having ordinary skill in the art to which the present invention pertains does not depart from the technical spirit of the present invention. It will be readily appreciated that various substitutions, modifications and variations can be made.

110: light emitting unit 111: substrate
113: LED 130: the first heat dissipation unit
131: first inner heat dissipation unit 135: first outer heat dissipation unit
170: electrical connection

Claims (12)

A light emitting unit 110 having a substrate 111 on which an LED 113 is mounted; An electrical connection unit 170 for supplying electricity to the light emitting unit 110 and a first heat dissipation unit 130 provided between the light emitting unit 110 and the electrical connection unit 170, the one or more vent holes in the longitudinal direction LED bulb with improved heat dissipation, characterized in that consisting of). According to claim 1, wherein the first heat dissipation unit 130 is inserted into the hollow first inner heat dissipating portion 131 and the first inner heat dissipating portion 131 formed to extend outwardly inclined lower end extends outward inclined. LED bulb having a heat dissipation function, characterized in that formed by the first outer heat dissipation portion 135 is formed between the first inner heat dissipation portion 131 and the ventilation hole. The method of claim 2, wherein the first inner heat dissipation portion (131) comprises a hollow inner pillar portion (1311); An inner heat dissipating plate part 1313 provided at a lower portion of the inner column part 1311 and having an outer diameter increasing toward the lower portion; A first support pin 1315 protruding radially on an outer circumferential surface of the inner heat-dissipating plate part 1313 and a lower outer circumferential surface of the inner heat-dissipating plate part 1313 between the first support pins 1315 and the first support pins 1315. An LED bulb having a heat dissipation function, comprising a first heat dissipation fin (1319) protruding radially, and a concave fixing groove (1312) is formed on the inner heat dissipation plate part (1313). The method of claim 3, wherein the first outer heat dissipation unit 135 is a hollow outer column (1351); The outer circumferential surface of the outer pillar (1351) is provided in plurality at equal intervals, the outer heat radiation plate portion 1353 and the inner side of the outer surface of the outer heat radiation plate portion 1353, the lower portion of which extends in the direction of increasing the outer diameter is LED bulb with improved heat dissipation, characterized in that consisting of a fixing tab 1352 provided to correspond to the fixing groove (1312). 5. The vent hole of claim 4, wherein the vent hole is formed between the upper vent hole 1359 formed between the outer heat sink portion 1353 and the outer pillar portion 1351, and the inner heat sink portion 1313 and the outer heat sink portion 1353. The lower vent hole (1316), the upper vent hole (1359) and the lower vent hole (1316) LED bulb with improved heat dissipation, characterized in that the communication. 4. The LED bulb of claim 3, wherein an upper end of the outer heat radiating plate part (1353) extends to an upper portion of the outer column part (1351). The LED bulb according to claim 4, wherein a support groove (1355) is formed in the outer column (1351) between the outer heat radiating plate portion (1353) and the outer heat radiating plate portion (1353). The method of claim 7, wherein when the first outer heat dissipation part 135 is stacked on the first inner heat dissipation part 131, the inner column part 1311 is inserted into the outer column part 1351 and the inner heat sink part ( 1313 and the outer pillar portion 1351 are in contact with each other, and the first support pin 1315 is inserted between the outer heat dissipation plate portion 1353 and the outer heat dissipation plate portion 1353, and the first support pin 1315 and the first support pin 1315 are inserted into the outer support portion 1315. The heat dissipation fin (1319) is in contact with the outer heat dissipating plate portion 1353 LED bulb with improved heat dissipation function, characterized in that the lower vent hole 1316 is formed between the outer heat dissipating plate portion (1353). The method of claim 3, wherein the first support pin 1315 is formed extending from the upper end to the lower end of the inner heat radiation plate portion 1313, the first heat radiation fin 1319 is of a different length than the first support pin 1315. LED bulb with improved heat dissipation, characterized in that formed. A light emitting unit 110 having a substrate 111 on which an LED 113 is mounted; It is provided between the electrical connection unit 170 and the light emitting unit 110 and the electrical connection unit 170 for supplying electricity to the light emitting unit 110, the lower second inner heat dissipation unit formed to extend inclined outward ( 131a and the outer circumferential surface of the second inner heat dissipating portion 131a are integrally provided in a radially outwardly spaced state, and a lower end portion is formed to be inclined outwardly and spaced apart from the outer circumferential surface of the second inner heat dissipating portion 131a. LED bulb having a heat dissipation function, characterized in that it comprises a second heat dissipating portion (130a) consisting of a plurality of second outer heat dissipating portion (135a) provided. The second heat dissipation between the second heat dissipation fins 1319a and the second heat dissipation fins 1319a and the second heat dissipation fins 1319a on the outer circumferential surface of the second inner heat dissipation portion 131a. A second support pin 1315a protruding radially from the outer circumferential surface of the part 131a is provided, and the second outer heat dissipation part 135a is formed by the second support pin 1315a and the second heat dissipation pin 1319a. 2 LED bulb with improved heat dissipation, characterized in that the spaced apart from the inner heat dissipation unit (131a). 12. The heat dissipation groove 1355a having a concave shape in the longitudinal direction is formed in the second outer heat dissipation portion 135a between the second support fin 1315a and the second heat dissipation fin 1319a. LED bulb with improved heat dissipation.

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