KR101537227B1 - Led bulb for vehicle - Google Patents

Abstract

The present invention relates to an LED bulb for a vehicle, and, more specifically, to an LED bulb for a vehicle wherein the conventional halogen bulb for a vehicle is replaced with a high-efficiency LED with a low power consumption and a smooth conversion between a low beam and a high beam is possible by selectively shielding the bottom of the bulb. The LED bulb for a vehicle according to the present invention comprises: a body unit which is a main body part inserted into a bulb access unit of a lamp for a vehicle with an accommodating space inside; a light source unit which comprises an LED; and a PCB with the LED mounted, and which is installed on the front side of the body unit for irradiating light; a lens unit which comprises: a lens which is combined with the body unit, lets penetrate or reflects the light generated by the light source unit, is combined with the front side of the body unit, is made from transparent materials for the light generated by the light source to pass through, and is made into a hollow cylindrical shape with the front side and the rear side open; and a reflector which is combined with the opening on the front side of the lens for reflecting the light generated by the light source unit to the sides and the rear with a reflecting mirror of the lamp for the vehicle; a shade which is placed on the inner circumferential surface of the bottom of the lens for moving straight to the front and the rear and selectively shielding the bottom of the lens; and a shade operating unit which is built in the accommodating space inside the body unit for moving the shade straight.

Description

LED bulb for vehicle {LED BULB FOR VEHICLE}

The present invention relates to an LED bulb for a vehicle, and more particularly, to an LED bulb for a vehicle, which can replace a conventional automotive halogen bulb with a low-power, high-efficiency LED and selectively shield the lower portion of the bulb, will be.

The vehicle is provided with various lamps for illuminating the forward direction according to the external environment and time to secure the view of the driver and to inform the other vehicle of the progress route.

These lamps are classified according to the purpose of use. They include a headlamp having a purpose of illuminating the forward direction, a turn signal lamp having a purpose of informing the progress path of the vehicle, a fog, a head lamp in rainy weather, And a back light that lights up when the vehicle is backward.

Halogen bulbs have been mainly used in conventional vehicle lamps. As a conventional technique using a halogen bulb, there is a registered patent No. 10-259788 (Jun. 15, 2000), in which a halogen lamp is used as a light source and irradiated through a reflector that reflects light emitted from the halogen lamp The light is irradiated forward. Halogen bulb is 220V to 12V, which is inexpensive. However, there is a disadvantage in that the lamp has a low luminance and a short life span as compared with the electricity used.

In order to solve such a problem, the present applicant has proposed a vehicular LED bulb for halogen bulb replacement in Korean Utility Model No. 20-0469595. Such a vehicle LED bulb can achieve low power and high efficiency.

On the other hand, in the case of night driving, a low beam is used for a general city driving in a relatively bright city center, and a high beam is used for illuminating a forward direction on a relatively dark road such as a country road and securing a view to a far distance. However, in the case of a conventional conventional halogen bulb, separate low-beam and high-beam filaments are provided, which can be selectively used when necessary. On the other hand, in the case of the LED bulb substituting for a halogen lamp of the present applicant, No means of

It is an object of the present invention to provide a vehicular LED bulb capable of achieving low power hysteresis by replacing a bulb used in a vehicular lamp with a halogen bulb to an LED bulb, as well as easily switching between a low beam and a high beam.

According to an aspect of the present invention, there is provided an LED bulb for a vehicle, comprising: a main body portion inserted into a bulb connecting portion of a lamp for a vehicle, the body portion including a receiving space therein; An LED and a PCB on which the LED is mounted, a light source installed on a front side of the body to irradiate light; A light emitting diode (LED), which is coupled to the body portion and transmits or reflects light generated from the light source portion, is connected to the front side of the body portion and is made of a transparent material so as to allow light generated from the light source to pass therethrough, And a reflector coupled to the front side opening of the lens to reflect the light generated from the light source part to the rear side of the side provided with the reflector of the vehicle lamp; A shade disposed on an inner circumferential surface of a lower half of the lens and linearly moving toward the front and rear sides to selectively shield the lower half of the lens; And a shade driving unit incorporated in an inner receiving space of the body unit and linearly moving the shade.

Here, the shade includes a shield piece curved in an arc shape corresponding to a shape of an inner lower half of the lens, and a coupling piece protruded from a rear-side center of the shield piece.

The shade driving unit includes: a ring-shaped permanent magnet disposed inside the body casing; A bobbin inserted in the inner space of the permanent magnet so as to be movable forward and backward, a coil wound around an outer circumferential surface of the bobbin and acting as an electromagnet as current flows through the coil; And a shade bobbin having a rear end coupled to the bobbin and the shade coupled to the front lower surface.

In addition, the body includes a casing having a receiving space formed therein so that the light source unit is coupled to the front end thereof and the shade driving unit is embedded therein, the front side is formed as a hollow cylindrical shape extending in the longitudinal direction, A body casing having a cylindrical light source mounting portion in a front end side thereof and a front receiving portion in which a lower portion is cut in a longitudinal direction and a rear side receiving portion in a cylindrical shape having a larger diameter than the front receiving portion; A center pole protruding from an inner side of a rear side inner wall to a front side and a center pole protruding from an inner side of the center pole toward a front side of the rear side inner wall, A cap having a plurality of heat dissipating protrusions for discharging heat generated by LED lighting to the outside; And a socket for coupling the lens to the body portion, the socket being inserted into the front receiving portion of the body casing from the front side.

The permanent magnet is fitted in the magnet holder on the rear side. The magnet holder is inserted into a groove formed on the rear side of the permanent magnet to support the permanent magnet. The permanent magnet is formed in a cylindrical shape to be mounted inside the cap. A hollow shaft is formed at the center so as to be inserted into and supported by the center pole formed at the center of the cap; The bobbin includes a hollow hollow cylinder and a flange for preventing the coil from escaping from the rear end of the bobbin. The bobbin is inserted into the inner space of the permanent magnet and inserted into the hollow shaft outer peripheral surface of the magnet holder, And is mounted movably back and forth while being slid along the hollow shaft.

A V-groove is formed on the outer circumferential surface of the permanent magnet so that the tip end of the fixing bolt passing through the rear receiving portion of the body casing is inserted to fix the permanent magnet fixedly without flowing.

As described above, according to the present invention, by using LED bulb instead of halogen bulb, it is possible to achieve low power and high efficiency as compared with halogen bulb and to easily switch between low beam and high beam through selective shielding under the lens Respectively.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a vehicle LED bulb according to one embodiment of the present invention,
2 is an exploded perspective view of a vehicle LED bulb according to the present invention,
3 is a perspective view of a body casing of an LED bulb for a vehicle according to the present invention,
4 is a socket perspective view of a vehicle LED bulb according to the present invention,
5 is a perspective view illustrating a state where a shade is coupled to a body portion of an automotive LED bulb according to the present invention,
FIG. 6 (a) is a sectional view of the LED bulb for a vehicle according to the present invention taken along line AA 'of FIG. 1,
6 (b) is a sectional view of the LED bulb for a vehicle according to the present invention taken along line BB 'of FIG. 1,
FIG. 7 is a sectional view (a) and a perspective view (b) of a low beam of a vehicle LED bulb according to the present invention,
8 is a cross-sectional view (a) and a perspective view (b) when a high beam is used in a vehicle LED bulb according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the structure and operation of a vehicle LED bulb according to the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

1 to 3, an automotive LED bulb according to the present invention includes a body 100, a light source 200, a lens 300, a shade 400, a shade driver 500, and a power supply .

The body portion 100 is a main body portion inserted into a bulb connection portion (not shown) of a vehicle lamp, and includes a body casing 110, a cap 120, and a socket 130.

The body casing 110 is a casing in which a light source unit 200 to be described later is coupled to a front end thereof and a receiving space is formed therein so that a shade driving unit 500 to be described later is incorporated therein. More specifically, As shown in the figure, the front side is composed of a cylindrical front receiving portion 110A which is formed generally in the longitudinal direction, and the rear side is composed of a cylindrical rear receiving portion 110B which is generally larger in diameter than the front receiving portion 110A .

The front receiving portion 110A of the body casing 110 is formed of a hollow hollow cylinder, but a cylindrical light source mounting portion 111 is installed inside the front end portion so that the light source portion 200 can be installed at the front end.

The light source mounting portion 111 has a diameter corresponding to the inner diameter of the front receiving portion 110A and may be integrally formed with the front receiving portion 110A or may be integrally formed with the front receiving portion 110A by a conventional fastener, 110A. A plurality of bolt holes 111a are formed in the front end of the light source mounting portion 111 to couple the PCB 220 constituting the light source 200 to be described later, Two cable holes 111b (for the positive pole and the negative pole) through which the power cable 116 is passed are formed. Here, the cable hole 111b penetrates the light source mounting portion 111 in the longitudinal direction and communicates with the inner space on the rear side of the front receiving portion 110A.

The lower portion of the front receiving portion 110A of the body casing 110 is partially cut for installation of the shade 400 and the shade bobbin 530 described later. 2, a shade bobbin 530 is inserted into the rear side of the front receiving portion 110A and a rear lower portion of the front receiving portion 110A is inserted into the shade bobbin 530 Are exposed. A shade 400 coupled to the shade bobbin 530 is disposed at a lower portion of the front side of the front receiving portion 110A, that is, a section where the light source attaching portion 111 is provided, So that the lower half is cut in the longitudinal direction. The installation and connection relationship of the shade 400 and the shade bobbin 530 will be described later.

On the other hand, a coupling protrusion 112 for coupling a socket 130 to be described later is provided on the outer peripheral surface of the rear end side of the front receiving portion 110A of the body casing 110. [

The rear receiving portion 110B of the body casing 110 is a portion that receives the bobbin 520, the permanent magnet 510 and the magnet holder 512 of the shade driving portion 500 to be described later, , And is preferably formed of a hollow cylinder having a generally open rear side, and the outer surface is preferably formed with an LED (not shown) A plurality of heat dissipating protrusions 113 are formed for discharging the heat generated at the time of lighting.

A cable inlet 114 through which the power supply cable 116 for the LED 210 is inserted is formed on one side, preferably the lower side, of the rear receiving portion 110B. The grommet 115 is inserted into the cable inlet 114 and the power cable 116 is inserted into the body casing 110 through the grommet 115 and the cable inlet 114. The inserted power cable 116 passes through the rear side flange 522 of the shade bobbin 530 described later and then passes through the empty space inside the front receiving portion 110A of the body casing 110 as shown in FIG. And is finally inserted into a cable hole 111b formed in the PCB 220 of the light source unit 200 and connected to a terminal electrically connected to the LED 210. [

The cap 120 covers a rear opening of the rear housing part 110B of the body casing 110 and houses a magnet holder 512 to be described later. The cap 120 is formed in a hollow cylindrical shape having an open front side, A center pole 122 for mounting the magnet holder 512 protrudes forward from the rear side inner wall at the center of the inner side and a plurality of center poles 122 for emitting heat generated by LED lighting A heat dissipating protrusion 113 is formed. A hook member 124 is formed at the distal end of the cover so as to be engaged with the rear receiving portion 110B of the body casing 110 to form a hook groove 124 formed in the inner peripheral surface of the rear end of the rear receiving portion 110B of the body casing 110 Not shown), and may be coupled by other screw or separate fasteners or the like.

The socket 130 is an intermediate medium for coupling a lens 310 to be described later to the body 100. The socket 130 includes a front receiving portion 110A of the body casing 110, Lt; / RTI > Fig. 4 shows a front side and rear side perspective views of such a socket 130. Fig.

The socket 130 includes a hollow cylindrical body 132 formed with a space at the center so as to be inserted into the outer circumferential surface of the front receiving portion 110A of the body casing 110, And an annular rib 134 protruding along the central perimeter. A plurality of locking protrusions 134a may be spaced apart from the outer end of the annular rib 134 so as to be hung on a reflector 10 (see FIG. 7) of the vehicle lamp.

4 (b), on the rear outer side of the front receiving portion 110A of the body casing 110, the rear end portion of the cylindrical body 132 is formed on the annular rib 134, And a baronet fastener 132a coupled to the coupling protrusion 112 formed therein. 'Bayonet' means a fastening structure originally designed to combine a large sword at the end of a rifle. It is a structure in which projections are inserted into grooves connected to be orthogonal to each other, and then rotated. 4 (b), in order to fix the socket 130 to the front receiving portion 110A of the body casing 110, the rear end of the cylindrical body 132 of the socket 130 And a coupling protrusion 112 formed on the outer circumferential surface on the rear side of the front receiving portion 110A of the body casing 110 is inserted into the baroconvex fitting portion 132a And then rotated. However, it will be appreciated that other fastening methods such as hooks may be used for coupling the socket 130 and the body casing 110, in addition to the baronet fastener 132a.

A hook insertion groove 132b is formed in the front portion of the cylindrical body 132 of the socket 130 so as to insert a plurality of coupling hooks 312 formed in a lens 310 to be described later, 132b are connected to the hook engagement groove 132c formed on the rear side of the cylindrical body 132 through the annular rib 134. [ The coupling hook 312 of the lens 310, which will be described later, is engaged with the hook coupling groove 132c. Preferably, the hook insertion groove 132b and the hook engagement groove 132c are spaced a predetermined distance around the front and rear portions of the cylindrical body 132. However, it will also be appreciated that other fastening methods other than hook coupling may be used for coupling the socket 130 and the lens 310. [

The light source unit 200 is mounted on the front side of the body 100. The light source unit 200 includes an LED 210 and a PCB 220 for lighting the LED 210. 2, a PCB 220 provided with an LED 210 is mounted on a front end surface of a light source mounting portion 111 formed in a front receiving portion 110A of the body casing 110 by bolts And is fixedly coupled. Here, the LED 210 is surrounded by a hemispherical diffusion lens and emits light in all directions on the front side.

The lens unit 300 includes a lens 310 and a reflector 320 coupled to the body 100 to transmit or reflect light generated from the light source 200.

The lens 310 is coupled to the front side of the socket 130 and is made of a transparent material so as to allow light generated from the light source to pass therethrough and has a hollow cylindrical shape with front and rear sides opened.

A plurality of coupling hooks 312 are protruded from the rear end of the lens 310 and spaced apart from each other by a predetermined distance. The coupling hook 312 is disposed in front of the cylindrical body 132 of the socket 130, And is engaged with the hook engagement groove 132c formed on the rear side of the cylindrical body 132 after being inserted into the hook insertion groove 132b formed on the side of the cylindrical body 132. [

A reflector (not shown) for reflecting the light traveling from the light source unit 200 toward the front side to the rear side of the reflector 10 (see FIG. 7) of the vehicle lamp, (320). The reflector 320 is fitted to the front opening of the lens 310 and is plated with a material such as silver or aluminum.

The reflector 320 is configured such that the rear surface thereof is generally "" -shaped and the central portion thereof is convex so that the light generated from the light source unit 200 is reflected on the left and right slopes, The configuration of the reflector 320 is described in detail in Korean Registered Utility Model No. 20-0469595, which is a registered trademark of the present applicant, and will not be described further.

The shade 400 is a part that allows switching between a low beam and a high beam as the shade 400 selectively shields the lower half of the lens 310. The shade 400 is made of a light-transmitting material. As shown in FIG. 2, A coupling piece 420 protruding from the center of the rear side of the shield piece 410 and coupled to a lower portion of a shade bobbin 530 to be described later, . The coupling piece 420 is coupled to a lower portion of a shade bobbin 530, which will be described later, with a fastener such as a bolt.

The shade 400 linearly moves forward and backward according to a driver's selection and selectively shields the lower half of the lens 310, thereby enabling switching between a low beam and a high beam. The vehicle LED bulb according to the present invention further includes a shade driving unit 500 for linear movement of the shade 400. The shade driving unit 500 includes a permanent magnet 510, 512, a bobbin 520, a coil 521, and a shade bobbin 530.

As shown in FIGS. 2 and 6, a ring-shaped (donut-shaped) permanent magnet 510 is disposed inside the rear receiving portion 110B of the body casing 110, Side magnet holder 512 and is mounted. 6 (a), the magnet holder 512 is inserted into a groove formed on the rear side of the permanent magnet 510 to support the permanent magnet 510, so that the permanent magnet 510 is mounted inside the cap 120 And a hollow shaft 512a is formed at the center so as to be inserted into and supported by the center pole 122 formed at the center of the cap 120. [

A V-shaped groove 510a cut in a V-shape is formed on the outer circumferential surface of the permanent magnet 510. The V-shaped groove 510a is formed in the body casing 110 as shown in FIG. 6 (b) The front end of the fixing bolt 511 passing through the rear accommodating portion 110B of the permanent magnet 510 is inserted so that the permanent magnet 510 is fixedly supported without flowing.

In the inner space of the permanent magnet 510, a bobbin 520 is inserted and arranged to be movable back and forth. To this end, the bobbin 520 is formed of a hollow hollow cylinder, a coil 521 is wound on the outer circumferential surface, and a flange 522 is provided around the rear end to prevent the coil 521 from coming off. The bobbin 520 on which the coil 521 is wound functions as an electromagnet. That is, the bobbin 520 is made of a steel material, or a steel material core is provided therein, and an outer surface thereof is molded with a synthetic resin, and the bobbin 520 is magnetized by a current flowing in the coil 521. The bobbin 520 is inserted into the inner space of the permanent magnet 510 and then inserted into the outer circumferential surface of the hollow shaft 512a of the magnet holder 512. The bobbin 520 is slid along the hollow shaft 512a of the magnet holder 512, So as to be movable back and forth.

The bobbin 520 is coupled to the rear side of the shade bobbin 530. The shade bobbin 530 is an intermediary for interconnecting the shade 400 and the bobbin 520. The bobbin 520 is fixedly coupled to the rear side of the shade bobbin 530 by a fastener such as a screw, 400 are fixedly coupled to the lower portion of the shade bobbin 530 by fasteners such as bolts. The shade bobbin 530 and the shade 400 coupled thereto move together when the bobbin 520 with the coil 521 wound thereon linearly moves forward and backward.

The coil 521 wound around the bobbin 520 is drawn out to the outside through an empty space between the bobbin 520 and the shade 400 and is electrically connected to the high beam actuating part, It is configured to receive power.

Up to now, the structure of the LED bulb for a vehicle according to the present invention has been described. Hereinafter, the operation of the LED bulb for a vehicle according to the present invention will be described with reference to Figs. 7 and 8. Fig.

Fig. 7 shows a sectional view (a) and a perspective view (b) when the low beam is used in the vehicle LED bulb according to the present invention. As shown, the LED bulb is installed in the center of the hemispherical reflector 10 provided in the vehicle. Light generated from the LED 210 of the light source unit 200 is reflected laterally by the reflector 320 and then reflected by the reflector 10 to be irradiated forward.

In general, a vehicle lamp has a large amount of light on the outside, so when the vehicle is traveling in a city on a relatively bright inner-city road, a relatively low light amount is used and a low beam is used so as not to interfere with the visibility of an opponent vehicle driver. Refers to light that is reflected from the upper inclined plane of the reflector 320 and is reflected backward by the upper-half curved surface of the reflector 10 to be directed downward.

In order to form such a low beam, the vehicle LED bulb according to the present invention shields the lower half of the lens 310 with the shade 400 so that light can not pass through the lower half of the lens 310. [ As a result, reflection on the lower half curved surface of the reflector 10 is not performed, so that a high beam irradiated toward the front upward direction is not formed. 7 (a), the bobbin 520 on which the initial coil 521 is wound is inserted into the central opening of the permanent magnet 510, And the shade bobbin 530 coupled to the bobbin 520 is also moved forward as far as possible so that the front surface of the shade bobbin 530 is moved to the light source mounting portion 111 As shown in Fig. 7A and 7B, the shade 400 coupled to the shade bobbin 530 is also moved to the front side to cover and cover the entire lower half of the lens 310. As shown in FIGS.

On the other hand, in the case of nighttime driving in a relatively dark place due to lack of external illumination such as a country road or a national highway, the amount of light is larger than that of a low beam and use of a high beam is required for securing a wide field of view. Fig. 8 is a sectional view (a) and a perspective view (b) when a high beam is used in a vehicular LED bulb according to the present invention.

7, when the operator operates the high beam operation selection button or the lever when the low beam is used and the use of the high beam is required, the coil (not shown) wound on the bobbin 520 in the controller 521) in one direction. The bobbin 520 temporarily becomes magnetized when a current is applied to the coil 521 and the bobbin 520 is inserted into the hollow of the magnet holder 512 in accordance with the Fleming left- Sliding along the axis 512a and moved backward as shown in Fig. 8 (a). Here, the direction of the current is selectively applied in the direction of moving the bobbin 520 to the rear side in accordance with the polarity of the permanent magnet 510 and the left-hand rule of Fleming. When the bobbin 520 is moved backward, the shade bobbin 530 coupled to the bobbin 520 and the shade 400 coupled to the shade bobbin 530 move backward together, the lower half of the lens 310 which has been shielded by the shade 400 is opened, as shown in Fig.

8 (a), when the lower half of the lens 310 is opened by the rearward movement of the shade 400, the light reflected on the upper half inclined surface of the reflector 320 is reflected by the upper half curvature of the reflector 10 Reflected by the lower half of the reflecting mirror 10, and forms a high beam which is irradiated toward the front upward direction. As described above, in a dark road such as a country road, the low beam and the high beam are used together to increase the light amount, and the high beam can secure a field of view far enough.

On the other hand, when the user desires to stop using the high beam, when the driver operates the high beam release button or the lever, the controller causes the reverse current to flow to the coil 521 wound on the bobbin 520. [ Then, the direction of the current is changed and the direction of the magnetic field is changed so that the bobbin 520 is advanced again according to the Fleming's left-hand rule so that the shade 400 shields the lower half of the lens 310 again as shown in FIG. 7 Only the low beam can be used.

By repeating such operations, the switching between the low beam and the high beam can be easily performed without taking measures such as the change in the number of the LED elements or the change in the irradiation angle.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the scope of the invention as defined by the appended claims. It should be interpreted as mad.

100: body portion 110: body casing
110A: front receiving portion 111: light source mounting portion
111a: Bolt hole 111b: Cable ball
112: engaging projection 110B: rear receiving portion
113: Heat dissipating protrusion 114: Cable entry
115: Grommets 116: Power cable
120: cap 122: center pole
124: hook member 130: socket
132: Cylindrical body 132a: Baronet fastener
132b: hook insertion groove 132c: hook engagement groove
134: annular rib 134a:
200: light source 210: LED
220: PCB 300: lens part
310: lens 312: coupling hook
320: Reflector 400: Shade
410: shielding piece 420: coupling piece
500: Shade driving part 510: permanent magnet
510a: V-groove 511: Fixing bolt
512: magnet holder 512a: hollow shaft
520: Bobbin 521: Coil
522: flange 530: shade bobbin

Claims (6)

A main body part inserted into a bulb connecting part of a lamp for a vehicle, comprising: a body part (100) having a receiving space therein;
A light source unit 200 including a LED 210 and a PCB 220 on which the LED 210 is mounted and installed on a front side of the body unit 100 to emit light;
A transparent part coupled to the body part 100 to transmit or reflect light generated from the light source part 200 and coupled to a front side of the body part 100 to allow light generated from the light source to pass therethrough A lens 310 having a hollow cylindrical shape whose front and rear sides are opened; a lens 310 coupled to the front side opening of the lens 310 to transmit the light generated from the light source unit 200 to the rear side A lens unit 300 including a reflector 320 for reflecting the light from the light source 300 to the light source 300;
A shade 400 disposed on an inner peripheral surface of a lower half of the lens 310 and linearly moving toward the front and rear sides to selectively shield the lower half of the lens 310;
And a shade driving part (500) incorporated in an inner receiving space of the body part (100) and linearly moving the shade (400);
The shade driving unit 500 includes:
A ring-shaped permanent magnet 510 disposed inside the body 100;
A bobbin 520 inserted into the inner space of the permanent magnet 510 so as to be movable forward and rearward and having a coil 521 wound on an outer circumferential surface thereof and acting as an electromagnet as a current flows through the coil 521;
And a shade bobbin (530) having a rear end coupled to the bobbin (520) and the shade (400) coupled to the front lower surface. The method according to claim 1,
The shade 400 includes a shield piece 410 curved in an arc shape corresponding to a shape of a lower inner half of the lens 310 and a coupling piece 420 protruding from the center of the rear side of the shield piece 410 And the LED bulb for vehicle. delete 3. The method according to claim 1 or 2,
The body part (100)
A housing having a receiving space formed therein so that the light source unit 200 is coupled to a front end thereof and the shade driving unit 500 is incorporated therein. The front side of the casing is formed as a hollow cylindrical shape extending in the longitudinal direction, And a rear side of the front receiving portion 110A is formed with a larger diameter than the front receiving portion 110A so that the rear receiving portion 110A has a larger diameter than the front receiving portion 110A, And a cylindrical rear receiving portion 110B having a substantially rectangular shape.
A center pole 122 protrudes from a rear inner wall toward the front and forms a hollow cylindrical shape having an opening at the front side and covers the rear opening of the rear housing part 110B of the body casing 110, A cap 120 having a plurality of heat dissipating protrusions 113 for emitting heat generated by LED lighting to the outside,
And a socket 130 for coupling the lens 310 to the body 100 and inserted and coupled from the front side of the front housing 110A of the body casing 110. [ Bulb. 5. The method of claim 4,
The permanent magnet 510 is fitted to the rear magnet holder 512 and is inserted into a groove formed on the rear side of the permanent magnet 510 to support the permanent magnet 510 A hollow shaft 512a is formed at the center so as to be inserted into and supported by the center pole 122 formed at the center of the cap 120;
The bobbin 520 is formed of hollow hollow cylinder and a flange 522 is provided around the rear end to prevent the coil 521 from coming off. After the bobbin 520 is inserted into the inner space of the permanent magnet 510, Is inserted and mounted on the outer circumferential surface of the hollow shaft (512a) of the magnet holder (512), and is mounted to be movable back and forth while sliding along the hollow shaft (512a) of the magnet holder (512). 6. The method of claim 5,
A V-groove 510a is formed in the outer circumferential surface of the permanent magnet 510 so that the front end of the fixing bolt 511 passing through the rear receiving portion 110B of the body casing 110 is inserted to fix the permanent magnet 510 fixedly, Is formed on the front surface of the LED bulb.

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