JP2019053940A - Led headlight - Google Patents

Abstract

To provide an LED headlight which enables change of a radiation direction of the LED headlight even if the LED headlight is attached to any kinds of vehicle lamp fittings.SOLUTION: An LED headlight includes: an LED5; a heat radiation pedestal 4 which radiates heat generated by the LED 5; and a heat conduction rod 2 which conducts the heat generated by the LED 5 to the heat radiation pedestal 4. In the heat conduction rod 2, the LED 5 is provided at the tip 20a side and the heat radiation pedestal 4 is provided at the base end 20b side. The heat radiation pedestal 4 has a shape in which one side (a breadth W1 side shown in Fig. 1(b)) protrudes further than the other side (a breadth W2 side shown in Fig 1(b)) with respect to an axis O1 of the heat conduction rod 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an LED headlamp, and more particularly to an LED headlamp used by being attached to a vehicle lamp.

  As a conventional LED headlamp, for example, the one described in Patent Document 1 is known. The LED headlamp will be described in detail with reference to FIG. 7. As shown in FIG. 7B, the conventional LED headlamp 100 includes a heat conducting rod 101, a base 102, and a heat radiating base 103. And mainly consists of. A pair of left and right LEDs 110 (only one LED 110 is shown in the figure) is attached and fixed to the tip 101a side of the heat conducting rod 101 via a printed wiring board 111 on which connection terminals (not shown) are mounted. Further, the tip end 102 a side of the base 102 is attached and fixed to the base end 101 b side of the heat conducting rod 101. The distal end 103a side of the heat dissipating base 103 is attached and fixed to the base end 102b side of the base 102 so that the axis O1 of the heat conducting rod 101 and the axis O2 of the heat dissipating base 103 are on the same axis. . Note that, as shown in FIG. 7A, a heat dissipating electric fan 112 is attached and fixed to the base end 103 b side of the heat dissipating base 103.

  Thus, in the conventional LED headlamp 100 configured as described above, the heat generated by the LED 110 is conducted by the heat conducting rod 101, and the conducted heat is radiated to the outside by the heat radiating base 103 or radiated. The electric fan 112 is forcibly radiated to the outside. As a result, the heat can be efficiently radiated, and therefore, it can be used for a long time without lowering the efficiency.

Japanese Patent Laying-Open No. 2006-081688

  By the way, as shown in FIG. 7A, the LED headlamp 100 as described above is used by being mounted in a reflector Tb1 in a tubular portion Tb provided at the rear portion of the housing Ta of the vehicular lamp T. Is. More specifically, the cap 102 of the LED headlamp 100 is provided with locking projections 102c having a central angle of 120 degrees as shown in FIG. 7B, and the locking projections 102c. A locking groove 102d is provided between the two. Thus, as shown in FIG. 7B, the locking protrusions Tb1a provided at intervals of 120 degrees on the rear inner periphery of the reflector Tb1 are formed in the locking grooves 102d provided in the base 102. By fitting, the base 102 and the reflector Tb1 are fitted to each other, so that the LED headlamp 100 is mounted in the reflector Tb1. Thereby, instead of the conventional halogen bulb or incandescent bulb, the LED headlamp 100 can be used as the light source of the vehicular lamp T.

  By the way, with the LED headlamp 100 mounted in the reflector Tb1, in order to change the irradiation direction of the LED headlamp 100, a levelizer (not shown) is used to change the direction of the arrow Y1 as shown in FIG. May be moved. At this time, the LED headlamp 100 also moves in the direction of the arrow Y1 as shown in FIG.

  By the way, at this time, as shown in FIGS. 7A and 7B, the gap H1 between the upper cylindrical portion Tb and the heat radiating pedestal 103 is the gap between the lower cylindrical portion Tb and the heat radiating pedestal 103. In the case of the vehicular lamp T that is narrower than H2, as shown in FIG. 7B, the heat dissipation pedestal 103 has the shape of the left and right objects around the axis O2, that is, the horizontal width W100 of the heat dissipation pedestal 103. Therefore, when the LED headlamp 100 is moved downward, the heat dissipation pedestal 103 interferes with the lower cylindrical portion Tb, that is, one side surface 103c of the heat dissipation pedestal 103 is lower cylindrical. Even when the LED headlamp 100 is moved upward (see the broken line portion shown in FIG. 7B) without contacting the portion Tb, the heat radiating base 103 interferes with the upper cylindrical portion Tb, that is, The other side surface 103d of the heat radiating base 103 is an upper cylindrical portion. Contacting the b, it may not be moved further. Thereby, there existed a problem that the irradiation direction of the LED headlamp 100 could not be changed in such a shape of the vehicular lamp T.

  Further, a waterproof cap (not shown) is attached to the inner peripheral portion of the tubular portion Tb, but the LED headlamp 100 is moved upward (see the broken line portion shown in FIG. 7B). At this time, even if the heat dissipating base 103 does not interfere with the upper cylindrical portion Tb, there is a possibility that it interferes with the waterproof cap, that is, touches and cannot be moved any more, so that the irradiation direction of the LED headlamp 100 can be changed. There was also a problem that it could not be changed.

  Therefore, in view of the above-described problems, an object of the present invention is to provide an LED headlamp that can change the irradiation direction of the LED headlamp regardless of the vehicular lamp.

  The object of the present invention is achieved by the following means. In addition, although the code | symbol in a parenthesis attaches the referential mark of embodiment mentioned later, this invention is not limited to this.

According to invention of Claim 1, a light emitting element (for example, LED5),
A heat dissipating part (for example, a heat dissipating base 4) that dissipates heat generated by the light emitting element (for example, the LED 5);
A heat conducting part (for example, heat conducting rods 2, 2A, 2C) that conducts heat generated in the light emitting element (for example, LED 5) to the heat radiating part (for example, the heat radiating base 4),
The heat conducting part (for example, the heat conducting rod 2, 2A, 2C) is provided with the light emitting element (for example, LED 5) on the tip (for example, 20a) side, and the heat radiating part (for example, 20b) on the base end side (for example, 20b). , A heat dissipating base 4) is provided,
The heat dissipating part (for example, the heat dissipating base 4) has a lateral width shown on one side (for example, FIG. 1B) with respect to the axis (for example, O1) of the heat conducting part (for example, the heat conducting rods 2, 2A, 2C). W1 side, the width W1A side shown in FIG. 3 (b)) protrudes from the other side (for example, the width W2 side shown in FIG. 1 (b), the width W2A side shown in FIG. 3 (b)). It is characterized by.

  According to a second aspect of the present invention, in the LED headlamp according to the first aspect, the heat dissipating part (for example, the heat dissipating pedestal 4) is arranged such that the heat conducting part (for example, the heat conducting rod 2) has an axis (for example, , O1) is eccentric to the protruding shape side (see, for example, FIG. 1B).

  On the other hand, according to the invention of claim 3, in the LED headlamp according to claim 1, the axis (for example, O2) of the heat dissipating part (for example, heat dissipating base 4) and the heat conducting part (for example, heat conducting part). The axis (for example, O1) of the rod 2) is on the same axis.

  Next, effects of the present invention will be described with reference numerals in the drawings. In addition, although the code | symbol in a parenthesis attaches the referential mark of embodiment mentioned later, this invention is not limited to this.

  According to the invention of claim 1, the heat radiating part (for example, the heat radiating pedestal 4) is provided on one side (for example, the figure) with reference to the axis (for example, O1) of the heat conducting part (for example, the heat conducting rods 2, 2A, 2C). Since the width W1 side shown in FIG. 1 (b) protrudes from the other side (for example, the side of width W2 shown in FIG. 1 (b)), a levelizer (not shown) is used, and FIG. Even if it is moved in the direction of the arrow Y1, as shown in FIG. 6, it can be prevented from interfering with, ie, not contacting, the cylindrical portion (Tb) provided at the rear portion of the housing (Ta) of the vehicular lamp (T). Therefore, the irradiation direction of the LED headlamp can be changed no matter what kind of vehicle lamp is attached.

  By the way, in realizing the shape as described above, as in the invention of claim 2, the heat radiating portion (for example, the heat radiating base 4) is placed on the axis (for example, O 1) of the heat conducting portion (for example, the heat conducting rod 2). It may be eccentric (for example, see FIG. 1 (b)) to the protruding shape side, and as in the invention of claim 3, the axis (for example, O2) of the heat dissipating part (for example, heat dissipating base 4), You may make it the axis line (for example, O1) of a heat-conducting part (for example, heat-conducting rod 2) exist on the same axis line.

(A) is a perspective view which shows the LED headlamp which concerns on one Embodiment of this invention, (b) shows the side view of the LED headlamp which concerns on the embodiment, and the LED headlamp is a vehicle lamp It is a figure which shows the partial cross section figure of the vehicle lamp which shows the state attached to the. It is a disassembled perspective view of the LED headlamp which concerns on the same embodiment. (A) is a perspective view of the LED headlamp in which the axis of the heat-conducting rod and the axis of the heat dissipating base are on the same line, and (b) is a side view thereof. It is a disassembled perspective view of the LED headlamp which concerns on other embodiment. It is a disassembled perspective view of the LED headlamp which concerns on other embodiment. It is a disassembled perspective view of the LED headlamp which concerns on other embodiment. (A) is a perspective view which shows the state by which the conventional LED headlamp is attached in the cylindrical part Tb of a vehicle lamp, (b) shows the side view of the conventional LED headlamp, and the LED It is a figure which shows the partial cross section figure of the vehicle lamp which shows the state in which the headlamp is attached to the vehicle lamp.

  Below, one Embodiment of the LED headlamp which concerns on this invention is described concretely with reference to FIG.1 and FIG.2. In addition, in the following description, when showing the direction of up, down, left and right, it means up, down, left and right when viewed from the front of the figure.

  As shown in FIGS. 1 and 2, the LED headlamp 1 is mainly composed of a heat conducting rod 2, a base 3, and a heat radiating base 4. The heat conducting rod 2 is, for example, a substantially cylindrical shape integrally formed of aluminum, and is integrally formed with the substantially cylindrical heat conducting rod main body 20 and the base end 20b side of the heat conducting rod main body 20 as shown in FIG. And a cylindrical portion 21 having a diameter larger than that of the provided heat conducting rod main body 20. On both the left and right side portions of the heat conducting rod main body 20, a long first recess 20c is provided from the longitudinal direction (axial direction) tip 20a side to the middle portion, and the first recess 20c is further provided in the first recess 20c. A shorter second recess 20c1 is provided. In the second recess 20c1, a pair of left and right LEDs 5 (only one LED 5 is shown in the figure) is provided with a heat conductive adhesive via a printed wiring board 6 on which connection terminals (not shown) are mounted. It is fixed by ultrasonic welding or rivets. The LED 5 is composed of a high beam or low beam LED chip.

  On the other hand, the base 3 is formed of aluminum or the like, for example, and as shown in FIG. 2, a thick plate protruding integrally from the outer peripheral surface of the cylindrical cylindrical portion 30 and the base end portion 30 a of the cylindrical portion 30. And a circular portion 31 having a shape. The inner diameter of the cylindrical portion 30 is formed larger than the diameter of the heat conducting rod main body 20, and an O-ring for an annular O-ring 7 is fitted in a substantially middle portion of the outer peripheral surface of the cylindrical portion 30. A groove 30b is formed. The outer circumferential surface of the circular portion 31 is provided with locking protrusions 31a having a central angle of 120 degrees, and a locking groove 31b is provided between the locking protrusions 31a. Further, a screw insertion hole 31c into which the fixing screw 8 is screwed is formed through the lower end side of the outer peripheral surface of the circular portion 31.

  On the other hand, the heat radiating pedestal 4 is formed of, for example, aluminum or the like. As shown in FIG. 2, as shown in FIG. Then, it is comprised with the cylindrical receiving part 41 integrally provided in the front end surface 40a upper end part side. A plurality of fins 40a1 are formed radially through the front end surface 40a of the heat radiating base body 40, and a heat radiating electric fan 112 as shown in FIG. 7A is attached to the base end surface 40b. It is fixed. Further, the inner diameter of the receiving portion 41 is formed to be substantially the same as the cylindrical portion 21 of the heat conducting rod 2, and the cylindrical portion 21 of the heat conducting rod 2 is fitted into the receiving portion 41.

  Thus, in assembling the LED headlamp 1 configured as described above, as shown in FIG. 2, the cylindrical portion 21 of the heat conducting rod 2 is fitted into the receiving portion 41 of the heat radiating base 4, and press-fitted and bonded. Fit and fix with etc. Thereby, the cylindrical part 21 of the heat-conducting rod 2 is concealed in the receiving part 41 of the heat-radiating base 4, and the heat-dissipating base 4 is fixed to the base end 20b side of the heat-conducting rod main body 20 in a state where the heat conducting bar main body 20 is exposed. The Rukoto.

  Next, when the heat conducting rod body 20 of the heat conducting rod 2 is passed through the cylindrical portion 30 of the base 3 in which the annular O-ring 7 is fitted in the O-ring groove 30b, the circular shape of the base 3 is obtained. The bottom surface (base end surface) of the portion 31 comes into contact with the distal end surface of the receiving portion 41 of the heat dissipating pedestal 4, so that the position of the base 3 is fixed at that position. Then, after finely adjusting the position of the base 3, the fixing screw 8 is screwed into the screw insertion hole 31 c formed through the circular portion 31 of the base 3. As a result, the screwed fixing screw 8 comes into contact with the outer peripheral surface of the heat-conducting rod main body 20, and thus the position of the base 3 is fixed.

  Thus, the LED headlamp 1 as shown in FIG. 1A is configured through the assembly as described above. Thus, the LED headlamp 1 configured as described above allows the heat generated by the LED 5 to be conducted by the heat conducting rod 2 and the conducted heat is radiated to the outside by the fins 40a1 of the heat radiating base 4, or Then, the heat can be forcibly radiated to the outside using the heat radiating electric fan 112 (see FIG. 7A). As a result, heat can be efficiently dissipated as in the prior art, so that it can be used without lowering efficiency for a long time.

  By the way, since the feature of this embodiment has a feature in the shape part of the heat radiating base 4, it will be described in detail in this respect. The heat dissipating base 4 of the LED headlamp 1 configured as described above, that is, the heat dissipating base body 40, as shown in FIG. 1B, the heat dissipating base with the axis O1 of the heat conducting rod 2 as a reference (boundary). One side (the lower side in the figure) of the main body 40 has a shape protruding from the other side (the upper side in the figure) of the heat radiating base body 40. That is, as shown in FIG. 1B, the width W1 of the heat radiating pedestal main body 40 on one side (the lower side in the drawing) is set on the other side (the lower side in the drawing) with the axis O1 of the heat conducting rod 2 as a reference (boundary). It is larger than the lateral width W <b> 2 of the heat dissipation pedestal main body 40. In other words, the heat dissipation pedestal main body 40 has an asymmetric shape with respect to the heat dissipation pedestal 4, that is, the axis O <b> 2 of the heat dissipation pedestal main body 40 as a reference (boundary).

  Thus, the LED headlamp 1 including the heat dissipation pedestal main body 40 having such a shape is similar to the conventional case, as shown in FIG. 1B, the housing Ta of the vehicle lamp T (FIG. 7B). (Refer to FIG. 1) The reflector Tb1 in the cylindrical portion Tb provided at the rear portion is used. More specifically, the locking protrusions Tb1a provided at intervals of 120 degrees are fitted to the locking groove 31b provided in the base 3 of the LED headlamp 1 at the rear inner periphery of the reflector Tb1. As a result, the base 3 and the reflector Tb1 are fitted to each other, so that the LED headlamp 1 is mounted in the reflector Tb1. Thereby, instead of the conventional halogen bulb or incandescent bulb, the LED headlamp 1 can be used as the light source of the vehicular lamp T.

  Thus, in the state where the LED headlamp 1 is mounted in the reflector Tb1, in order to change the irradiation direction of the LED headlamp 1, using a leveler (not shown), the direction of the arrow Y1 as shown in FIG. When moved to the position, the LED headlamp 1 also moves in the direction of the arrow Y1 as shown in FIG. At this time, the heat dissipating pedestal main body 40 is configured as shown in FIG. 1 (b) so that the gap with the upper cylindrical portion Tb is larger than the conventional gap H1 (see FIGS. 7A and 7B). ) With the axis O1 of the heat conducting rod 2 as a reference (boundary), the other side (the upper side in the figure) of the heat radiating base body 40 is not protruding beyond the one side (the lower side in the figure) of the heat radiating base body 40. It has become. Thereby, even if the LED headlamp 1 is moved upward (see the broken line portion shown in FIG. 1B), the heat radiating base 4, that is, one side surface 40c of the heat radiating pedestal main body 40 is in the upper cylindrical shape. The LED headlamp 1 can be moved upward (see the broken line portion shown in FIG. 1B) without interfering with the portion Tb. In addition, with reference to the axis O1 of the heat conducting rod 2 as a reference (boundary), one side (the lower side in the drawing) of the heat radiating base body 40 has a shape protruding from the other side (the upper side in the drawing) of FIG. As shown in (b), the gap between the lower tubular portion Tb and the other side surface 40d of the radiating pedestal main body 40 is set to a gap H2 of the same level as the conventional one. Even if it is moved in the direction, the heat radiating pedestal 4, that is, the other side surface 40d of the heat radiating pedestal main body 40 does not interfere with the lower cylindrical portion Tb. Although not shown, even if a waterproof cap (not shown) is attached to the inner peripheral portion of the cylindrical portion Tb, the gap H10 with the cylindrical portion Tb on the upper side is the conventional gap H1 (FIG. 7 (a), As shown in FIG. 1B, the heat radiating pedestal main body 40 has the other side of the heat radiating pedestal main body 40 (as shown in FIG. 1B) with reference to the axis O1 of the heat conducting rod 2 as a reference (boundary). Since the upper side is shaped so as not to protrude from one side (the lower side in the figure) of the radiating base body 40, the LED headlamp 1 is moved upward (see the broken line portion shown in FIG. 1B). In addition, it is possible to prevent the heat dissipation pedestal 4, that is, one side surface 40 c of the heat dissipation pedestal main body 40 from interfering with the waterproof cap. Thereby, the LED headlamp 1 can be moved upward (see the broken line portion shown in FIG. 1B).

  Therefore, according to this embodiment, even if the LED headlamp 1 is moved in the direction of the arrow Y1 as shown in FIG. One side of the heat dissipating base 4 (heat dissipating base body 40) with reference to the axis O1 of the heat conducting rod 2 as a reference (boundary) so as not to interfere with the cylindrical portion Tb provided at the rear part of the housing Ta of the lamp T. Side) is formed so as to protrude from the other side (illustrated upper side) of the radiator base 4 (the radiator base body 40) so as not to interfere with the cylindrical portion Tb provided at the rear portion of the housing Ta of the vehicle lamp T. I have to. Thereby, the irradiation direction of the LED headlamp can be changed regardless of any vehicle lamp.

  By the way, in this embodiment, as shown in FIG.1 (b), it heat-radiates one side (illustration lower side) of the thermal radiation base 4 (radiation base body 40) on the basis of the axis line O1 of the heat-conducting rod 2 (boundary). In making the shape projecting from the other side (the upper side in the drawing) of the base 4 (the heat dissipation base body 40), the axis O1 of the heat conducting rod 2 and the axis O2 of the heat dissipation base 4 (the heat dissipation base body 40) are not on the same line. That is, the heat radiation base 4 (heat radiation base body 40) is eccentric to the shape side (lower side shown in FIG. 1B) protruding from the axis O1 of the heat conducting rod 2. However, even if it is not eccentric in this way, as shown in FIG. 3 (particularly FIG. 3 (b)), the axis O1 of the heat conducting rod 2 and the axis O2 of the heat dissipation base 4 (heat dissipation base main body 40) are on the same line. It can also be.

  Thus, even if the axis O1 of the heat conducting rod 2 and the axis O2 of the heat dissipating base 4 (heat dissipating base main body 40) are on the same line, the axis O1 of the heat conducting rod 2 as shown in FIG. Can be a shape in which one side (the lower side in the drawing) of the heat radiating pedestal body 40 protrudes from the other side (the upper side in the drawing) of the radiating pedestal main body 40. That is, as shown in FIG. 3 (b), the width W1A of the heat radiating pedestal main body 40 on one side (lower side in the figure) is set on the other side (lower side in the figure) with the axis O1 of the heat conducting rod 2 as a reference (boundary). It can be made larger than the lateral width W2A of the radiating base body 40. In other words, the heat dissipating pedestal body 40, that is, the axis line O2 of the heat radiating pedestal main body 40 can be used as a reference (boundary), and the heat radiating pedestal main body 40 can be formed in an asymmetric shape.

  Thus, even in this way, it is possible to prevent interference with the tubular portion Tb provided at the rear portion of the housing Ta of the vehicular lamp T. Thereby, the irradiation direction of the LED headlamp can be changed regardless of any vehicle lamp. For ease of understanding, the width W1A of the radiating pedestal main body 40 on one side (lower side in the figure) shown in FIG. 3B and the width W2A of the radiating pedestal main body 40 on the other side (lower side in the figure) are Although shown as a width different from the horizontal widths W1 and W2 shown in FIG. 1B, it is of course possible to have the same horizontal width.

  By the way, the assembling method, shape, and the like of the LED headlamp 1 shown in the present embodiment are merely examples, and various modifications and changes are possible within the scope of the gist of the present invention described in the claims. It is. For example, a method as shown in FIG. 4 is also possible as a method of assembling the LED headlamp. In the description of the LED headlamp 1A shown in FIG. 4, the same components as those of the LED headlamp 1 shown in FIG. 1 and FIG.

  The LED headlamp 1A shown in FIG. 4 is mainly composed of a heat conducting rod 2A, a base 3A, and a heat radiating base 4. The heat conducting rod 2A has a heat conducting rod on the surface of the base end 20b of the heat conducting rod main body 20. A cylindrical portion 21A having a diameter smaller than that of the main body 20 is provided so as to project integrally. Further, the cylindrical portion 30 </ b> A of the base 3 </ b> A is provided so as to protrude from the front and rear ends of the circular portion 31. The cylindrical portion 21A is formed to have a smaller diameter than the inner diameter of the cylindrical portion 30A of the base 3A, so that it can be inserted into the cylindrical portion 30A of the base 3A. Further, the outer diameter of the cylindrical portion 30A of the base 3A is formed to be the same diameter as or smaller than the inner diameter of the receiving portion 41 of the heat radiating pedestal 4, and thus the rear end of the circular portion 31 in the receiving portion 41 of the heat radiating pedestal 4 The more protruding portion 30A1 can be inserted.

  Thus, in assembling the LED headlamp 1A configured as described above, as shown in FIG. 4, it protrudes from the rear end of the circular portion 31 of the cylindrical portion 30A of the base 3A into the receiving portion 41 of the heat radiating base 4. The fitted portion 30A1 is fitted and fixed by press fitting, adhesion or the like. As a result, the portion 30A1 protruding from the rear end of the circular portion 31 of the cylindrical portion 30A of the base 3A is concealed in the receiving portion 41 of the heat radiating base 4. The annular O-ring 7 is fitted in the O-ring groove 30b.

  Next, when the cylindrical portion 21A protruding from the heat conducting rod main body 20 is inserted into the cylindrical portion 30A of the base 3A, the base end 20b surface of the heat conducting rod main body 20 contacts the distal end surface of the cylindrical portion 30A of the base 3A. Accordingly, the position of the heat-conducting rod main body 20 is fixed at that position. Then, after finely adjusting the position of the heat conducting rod main body 20, the fixing screw 8 is screwed into the screw insertion hole 31c formed through the circular portion 31 of the base 3A. As a result, the screwed fixing screw 8 comes into contact with the outer peripheral surface of the heat-conducting rod main body 20, and the position of the heat-conducting rod main body 20 is fixed.

  Even in this way, the LED headlamp can be assembled.

  A method as shown in FIG. 5 is also possible. In the description of the LED headlamp 1B shown in FIG. 5, the same components as those of the LED headlamp 1 shown in FIG. 1 and FIG.

  The LED headlamp 1B shown in FIG. 5 is such that the receiving portion 41 of the heat radiating base 4 is integrally provided on the base end 20b side of the heat conducting rod main body 20 of the heat conducting rod 2 as shown in FIGS. It is different from the headlamp 1, and other than that is the same.

  Thus, when assembling the LED headlamp 1B configured as described above, the inside of the cylindrical portion 30 of the base 3 in which the annular O-ring 7 is fitted in the O-ring groove 30b is passed through the heat conducting rod. Two heat conducting rod main bodies 20 are passed. As a result, the bottom surface (base end surface) of the circular portion 31 of the base 3 comes into contact with the distal end surface of the receiving portion 41 of the heat radiation base 4, and the position of the base 3 is fixed at that position. Then, after finely adjusting the position of the base 3, the fixing screw 8 is screwed into the screw insertion hole 31 c formed through the circular portion 31 of the base 3. As a result, the screwed fixing screw 8 comes into contact with the outer peripheral surface of the heat conducting rod main body 20, and the position of the base 3 is fixed.

  Even in this way, the LED headlamp can be assembled.

  Furthermore, a method as shown in FIG. 6 is also possible. In the description of the LED headlamp 1C shown in FIG. 6, the same components as those of the LED headlamp 1 shown in FIGS. 1 and 2 are denoted by the same reference numerals and description thereof is omitted.

  The LED headlamp 1C shown in FIG. 6 is mainly composed of a heat conducting rod 2C, a base 3 and a heat radiating pedestal 4, and the heat conducting rod 2C and the heat radiating pedestal 4 are integrally provided. That is, the receiving portion 41 of the heat radiating pedestal 4 is integrally provided on the base end 20b side of the heat conducting rod main body 20 of the heat conducting rod 2C, and the heat conducting rod 2C and the heat radiating pedestal 4 in this state are formed in half. ing. As shown in FIG. 6, the half-shaped heat conducting rod 2C has a storage groove 20d for storing the printed wiring board 6 to which the LED 5 is attached and fixed along the longitudinal direction (axial direction). Is provided. Furthermore, a small window 20ca for exposing the LED 5 to the outside is formed through the first recess 20c.

  Thus, when assembling the LED headlamp 1C configured as described above, the LED 5 is exposed to the outside from the small window 20ca in the housing groove 20d provided in the half-shaped heat conducting rod 2C. The printed wiring board 6 is accommodated, and in this state, the half-shaped heat conducting rod 2C and the heat radiating base 4 are fixed by a heat conductive adhesive, ultrasonic welding or the like. Thereby, for example, the state shown in FIG. 5 is obtained.

  Next, the heat conducting rod main body 20 of the heat conducting rod 2C is passed through the cylindrical portion 30 of the base 3 in which the annular O-ring 7 is fitted in the O-ring groove 30b. As a result, the bottom surface (base end surface) of the circular portion 31 of the base 3 comes into contact with the distal end surface of the receiving portion 41 of the heat radiation base 4, and the position of the base 3 is fixed at that position. Then, after finely adjusting the position of the base 3, the fixing screw 8 is screwed into the screw insertion hole 31 c formed through the circular portion 31 of the base 3. As a result, the screwed fixing screw 8 comes into contact with the outer peripheral surface of the heat conducting rod main body 20, and the position of the base 3 is fixed.

  Even in this way, the LED headlamp can be assembled.

  On the other hand, in the present embodiment, the example in which the heat dissipating electric fan 112 as shown in FIG. 7A is mounted and fixed in the base end surface 40b of the heat dissipating base body 40 has been shown. The heat dissipating electric fan 112 may not be attached and fixed. That is, the heat dissipation electric fan 112 may not be provided.

  Moreover, in this embodiment, although the example which provides only one LED5 was shown, not only that but you may provide two or more. At this time, for example, a high beam LED chip and a low beam LED chip may be arranged in a straight line.

1, 1A, 1B, 1C Vehicle lamp 2, 2A, 2C Heat conducting rod (heat conducting part)
3 Base 4 Heat dissipation base (heat dissipation part)
5 LED (light emitting element)
O1 (heat conducting rod) axis O2 (heat radiating base) axis T Vehicle lamp Ta Housing Tb Tubular part

According to invention of Claim 1, a light emitting element (for example, LED5),
A thick heat radiation part (for example, heat radiation base 4) that dissipates heat generated by the light emitting element (for example, LED 5);
A rod-shaped heat conducting portion (for example, heat conducting rods 2, 2A, 2C) that conducts heat generated in the light emitting element (for example, the LED 5) to the heat radiating portion (for example, the heat radiating base 4);
A circular base (for example, bases 3 and 3A) provided with a locking protrusion (for example, locking protrusion 31a) that can be locked to a vehicle lamp (for example, a vehicle lamp T). ,
The heat conducting part (for example, the heat conducting rod 2, 2A, 2C) is provided with the light emitting element (for example, LED 5) on the side surface of the distal end (for example, 20a), and the base (for example, 20b) on the base (for example, 20b). , 3, 3 A) are provided,
The base (for example, the base 3, 3A) is provided with the heat conducting portion (for example, the heat conducting rods 2, 2A, 2C) on the tip surface side, and the heat radiating portion (for example, the heat radiating base 4) on the other end surface side. And
The heat dissipating part (for example, the heat dissipating base 4) is arranged on one side (for example, FIG. 1 (b) with reference to an axis (for example, O1) along the longitudinal direction of the heat conducting part (for example, the heat conducting rods 2, 2A, 2C). ) And the lateral width W1A side shown in FIG. 3B) are extended beyond the other side (for example, the lateral width W2 side shown in FIG. 1B and the lateral width W2A side shown in FIG. 3B). It is characterized by its shape.

According to a second aspect of the present invention, in the LED headlamp according to the first aspect, the heat dissipating part (for example, the heat dissipating base 4) is arranged in the longitudinal direction of the heat conducting part (for example, the heat conducting rod 2). along the axis (e.g., O1) comprising eccentrically to the bulgy side with respect to (e.g., see FIG. 1 (b)) are characterized by.

On the other hand, according to the invention of claim 3, in the LED headlamp according to claim 1, the axis (for example, O2) along the thickness direction of the heat dissipating part (for example, heat dissipating base 4), and the heat conducting part An axis (for example, O1) along the longitudinal direction of the heat conducting rod 2 (for example, O1) is on the same axis.

According to the first aspect of the present invention, the heat conducting portion (for example, the heat conducting rods 2, 2A, 2C) is provided with the light emitting element (for example, the LED 5) on the side surface of the distal end (for example, 20a), and the base end side (for example, 20b). ) Is provided with a base (for example, base 3, 3 </ b> A), a heat conducting portion (for example, heat conducting rod 2, 2 </ b> A, 2 </ b> C) is provided on the tip surface side of the base (for example, base 3, 3 </ b> A), The heat dissipation part (for example, the heat dissipation pedestal 4) in the LED headlamp provided with the heat dissipation part (for example, the heat dissipation pedestal 4) is an axis along the longitudinal direction of the heat transfer part (for example, the heat transfer rods 2, 2A, 2C) ( For example, on the basis of O1), one side (for example, the width W1 side shown in FIG. 1B) protrudes from the other side (for example, the width W2 side shown in FIG. 1B). From the arrow as shown in FIG. 1 (b) using a leveler (not shown). Even if it is moved in one direction, it can be prevented from interfering with, i.e., not contacting, the cylindrical portion (Tb) provided at the rear portion of the housing (Ta) of the vehicle lamp (T). Even if it is attached to a vehicular lamp, the irradiation direction of the LED headlamp can be changed.

By the way, in realizing the shape as described above, as in the invention of claim 2, the heat radiating portion (for example, the heat radiating base 4) has an axial line (for example, the heat conducting portion (for example, the heat conducting rod 2)) along the longitudinal direction. , O1) may be eccentric (see, for example, FIG. 1 (b)) on the protruding shape side, and as in the invention of claim 3 , along the thickness direction of the heat dissipating part (for example, heat dissipating base 4). An axis line (for example, O2) and an axis line (for example, O1) along the longitudinal direction of the heat conducting section (for example, the heat conducting rod 2) may be on the same axis.

Claims (3)

A light emitting element;
A heat dissipating part for dissipating heat generated in the light emitting element;
A heat conducting part for conducting heat generated in the light emitting element to the heat radiating part,
The heat conducting part is provided with the light emitting element on the distal end side and the heat radiating part on the proximal end side,
The heat radiation part is an LED headlamp having a shape in which one side protrudes from the other side with respect to the axis of the heat conducting part.   The LED headlamp according to claim 1, wherein the heat dissipating part is eccentric to the protruding shape side with respect to the axis of the heat conducting part. The LED headlamp according to claim 1, wherein an axis of the heat radiating portion and an axis of the heat conducting portion are on the same axis.

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