JP5506041B2 - LED bulb and lighting fixture - Google Patents

Description

  The present invention relates to an LED bulb and a lighting fixture.

  2. Description of the Related Art Conventionally, lighting fixtures that can change the direction of illumination by an LED (Light Emitting Diode) bulb have been proposed (see, for example, Patent Documents 1 and 2).

JP 2008-251444 A (Claim 1, paragraphs 0012, 0060 to 0062) JP 2007-12288 (Claim 3, paragraphs 0024 and 0083)

  However, the conventional lighting fixture cannot illuminate the lower portion of the lighting fixture when the insertion direction of the LED bulb with respect to the socket is horizontal or obliquely upward.

  The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide an LED bulb and a lighting fixture that can always illuminate the lower side regardless of the insertion direction of the LED bulb with respect to the socket.

LED bulb of the present invention comprises a body having an insertion portion to be inserted into the socket, the dome-shaped cover attached to the body, is accommodated in the cover, and the LED unit comprising an LED light source, wherein the the socket insertion portion is horizontal, or, when installed inclined vertically so that the LED light source becomes lower direction, is rotatable in conjunction each of the cover and the LED unit.

Lighting device of the invention, the LED light bulb and socket and a portion and a portion for supporting the socket for supporting the body of the LED bulb, comprising the insertion portion of the LED bulb LED insertion portion of the LED bulb is inserted It disposed over side from the light source.

According to the present invention, the LED power source can always be directed downward regardless of the vertical angle of the central axis of the LED bulb with respect to the horizontal direction.
Moreover, according to this invention, the downward direction of a lighting fixture can be irradiated with an LED light bulb irrespective of the insertion direction of the LED light bulb in a socket.

The side view which shows the LED light bulb of embodiment which concerns on this invention The longitudinal cross-sectional view which shows the structure of the LED bulb of embodiment which concerns on this invention AA sectional view of FIG. Part B enlarged view of FIG. The perspective view which shows the 1st protrusion and 2nd protrusion of the pressing member of embodiment which concerns on this invention The perspective view which shows the 3rd protrusion of the main body of embodiment which concerns on this invention The perspective view explaining the relationship between the notch of the cover which concerns on embodiment of this invention, and the 2nd protrusion of a pressing member. The longitudinal cross-sectional view which shows the lighting fixture of embodiment which concerns on this invention (A) is a side view which shows the groove | channel of the LED unit of another embodiment which concerns on this invention, (B) is a perspective view which shows the protrusion concerning another embodiment Sectional drawing explaining the non-rotatable range of the LED unit of embodiment which concerns on this invention The side view which shows the case where the horizontal rotation angle of the LED unit of another embodiment which concerns on this invention is 90 degree | times.

Hereinafter, an LED bulb and a lighting fixture according to embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an LED bulb 1 according to an embodiment of the present invention. The LED bulb 1 includes a main body 2 and a hemispherical dome-shaped cover 3 attached to the main body 2. As shown in FIG. 2, the main body 2 is disposed in the cover 3 that is electrically connected to the power supply device 4, an insertion portion 5 provided on the opposite side of the cover 3 and inserted into the socket, and the power supply device 4. The LED unit 7 and a reflecting member 9 provided around the LED light source 8 in the LED unit 7 are included.

  In the present embodiment, the LED unit 7 is formed in a substantially disk shape having the same diameter as the inner surface of the cover 3. The upper surface 7A and the lower surface 7B of the LED unit 7 are parallel to each other. The diameter of the upper surface 7A is larger than the diameter of the lower surface 7B. Further, a maximum diameter portion 7C having a diameter larger than that of the upper surface 7A and the lower surface 7B is provided between the upper surface 7A and the lower surface 7B.

  Thereby, the LED unit 7 is movable in a state in which the outer peripheral surface is in contact with the inner surface 3 </ b> A of the cover 3. The LED light source 8 is provided on the lower surface 7B of the LED unit 7. Further, the weight distribution of the LED unit 7 is such that the diameter line of the maximum diameter portion 7C is horizontal while the two intersection points of the diameter line of the maximum diameter portion 7C and the outer peripheral surface of the LED unit 7 are supported. When the LED unit 7 is adjusted in posture by its own weight, the upper surface 7A and the lower surface 7B are horizontally disposed, and the upper surface 7A is disposed above the lower surface 7B. .

  As shown in FIG. 3, the LED unit 7 is movably accommodated in the inner surface 3 </ b> A of the cover 3 and the hemispherical recess 2 </ b> A of the main body 2. As will be described later, the LED light source 8 always keeps the lower side in the state where the central axis C1 of the LED bulb 1 is horizontal (see FIG. 2) or the central axis C1 is inclined up and down (see FIG. 8). It is configured to face.

  As shown in FIG. 3, a ring-shaped pressing member 10 is sandwiched between the main body 2 and the cover 3. As shown in FIG. 4, a flange 3 </ b> C is provided on the end surface 3 </ b> B of the cover 3, and a grip portion 2 </ b> B having a U-shaped cross section for rotatably holding the flange 3 </ b> C is provided on the main body 2. The cover 3 is gripped by the grip portion 2B of the main body 2 so as to be rotatable about a center axis C1 on a plane orthogonal to the center axis C1. Hereinafter, this rotation is referred to as vertical rotation.

  Further, as shown in FIG. 3, at the intersection of the inner surface 3 </ b> A of the cover 3 and the center line C <b> 2 of the cover 3 orthogonal to the center axis C <b> 1 of the LED bulb 1, the position 2 A plurality of hemispherical protrusions 11A and protrusions 11B are provided.

  An annular groove 12 (see FIG. 9A) parallel to the upper surface 7A and the lower surface 7B (see FIG. 2) is provided on the outer peripheral surface of the maximum diameter portion 7C of the LED unit 7. In a state where the two protrusions 11A and the protrusions 11B are inserted into the groove 12, the LED unit 7 can rotate around the center line C2. Hereinafter, this rotation is referred to as horizontal rotation.

  As shown in FIG. 5, a first protrusion 10 </ b> B extending in the direction of the central axis C <b> 1 of the LED bulb 1 is provided on the inner peripheral surface 10 </ b> A of the pressing member 10. In addition, a second protrusion 10 </ b> D that extends outward from the pressing member 10 is provided on the outer peripheral surface 10 </ b> C of the pressing member 10. The first protrusion 10B and the second protrusion 10D are provided at positions corresponding to each other. Further, the flange 3 </ b> C of the cover 3 is provided with a notch 3 </ b> D communicating with the inner periphery and the outer periphery.

  As shown in FIG. 6, the grip 2B of the main body 2 is provided with a third projection 2C that projects into the recess 2A. As shown in FIG. 7, the second protrusion 10 </ b> D of the pressing member 10 is inserted into the notch 3 </ b> D of the cover 3. Thereby, the cover 3 rotates vertically around the central axis C <b> 1 simultaneously with the pressing member 10. The circumferential width of the notch 3D is formed wider than the circumferential width of the second protrusion 10D.

  When the cover 3 rotates clockwise about the central axis C1, the first protrusion 10B of the pressing member 10 contacts one side surface of the third protrusion 2C of the main body 2, and the cover 3 rotates counterclockwise. When the first protrusion 10B is rotated, the first protrusion 10B comes into contact with the side surface opposite to the third protrusion 2C. Thereby, the horizontal rotation angle of the cover 3 is limited to an angle of 360 degrees or less and close to 360 degrees.

  In the LED bulb 1, the LED light source 8 is always directed downward when the LED unit 7 is free-falled, the cover 3 is vertically rotatable, and the LED unit 7 in the cover 3 is horizontally rotated. Therefore, when the central axis C1 is horizontal and when it is inclined up and down, the LED unit 7 is oriented horizontally (the upper surface 7A and the lower surface 7B are horizontal) and the LED light source 8 is It is automatically adjusted so that

  In addition, as shown in FIG. 8, the electric wire 15 extended from the power supply device 4 is connected to the center part in the upper surface 7A of the LED unit 7. As shown in FIG. Therefore, the LED unit 7 cannot be rotated in the direction in which the LED unit 7 interferes with the electric wire 15, but this non-rotatable range corresponds to a range in which the main body 2 is irradiated, so that irradiation is unnecessary and there is no problem. Further, the LED unit 7 can be rotated outside the non-rotatable range.

  Also, as shown in FIG. 9A, the cross-sectional shape of the groove 12 of the LED unit 7 is U-shaped, and as shown in FIG. 9B, the first protrusion 11A or the second protrusion of the cover 3 is formed. By providing the square column part 16 in one or both of 11B, the rotation angle of the LED unit 7 can be limited to 90 degrees.

  That is, when the LED unit 7 rotates in the clockwise direction, one inner surface 12A of the groove 12 comes into contact with one end surface 16A of the quadrangular prism portion 16, and the rotation of the LED unit 7 is stopped. When the unit 7 is rotated 90 degrees counterclockwise, the other inner surface 12B of the groove 12 comes into contact with the other end surface 16B of the quadrangular prism portion 16, and the rotation of the LED unit 7 is stopped. Accordingly, as shown in FIG. 10, the horizontal rotation angle of the LED unit 7 is limited to 90 degrees.

  FIG. 11 shows a ceiling-embedded lighting fixture 20 to which the LED bulb 1 is applied. This lighting fixture 20 is a socket 21 that holds the LED bulb 1 in a state where the insertion portion 5 is above the LED light source 8 by inserting the LED bulb 1 and the insertion portion 5 of the LED bulb 1 obliquely from below. And a bottomed cylindrical cover portion 23 that supports the body 2 of the LED bulb 1 and covers the cover 3. An opening 23 </ b> A is provided at the lower end of the cover portion 23. A transparent member 24 is provided in the opening 23A.

  In this lighting fixture 20, the insertion portion 5 of the LED bulb 1 is inserted into the socket 21 from obliquely below, and the central axis C1 of the LED bulb 1 is inclined upward in FIG. It is automatically adjusted to be horizontal. Thereby, the LED light source 8 of the LED unit 7 is always adjusted to face downward, and the lower part of the lighting fixture 20 is irradiated by the light emitted from the LED light source 8.

  According to the LED bulb 1 of the present embodiment, the LED light source 8 of the LED unit 7 can always be directed downward regardless of the vertical inclination angle of the central axis C1 with respect to the horizontal line.

  Moreover, according to the lighting fixture 20 of this embodiment, the lower part of the lighting fixture 20 can be irradiated by the LED bulb 1 regardless of the insertion direction of the insertion portion 5 of the LED bulb 1 in the socket 21.

DESCRIPTION OF SYMBOLS 1 LED bulb 2 Main body 2A Recessed part 2B Gripping part 2C 3rd protrusion 3 Cover 3A Inner surface 3B End face 3C Flange 3D Notch 4 Power supply device 5 Insertion part 7 LED unit 7A Upper surface 7B Lower surface 7C Maximum diameter part 8 LED light source 9 Reflective member 10 Holding member 10A Inner circumferential surface 10B First projection 10C Outer circumferential surface 10D Second projection 11A Projection 11B Projection 12 Groove 12A Inner surface 12B Inner surface 15 Electric wire 16 Square column 16A One end surface 16B Other end surface 20 Lighting fixture 21 Socket 23 Cover portion 23A Opening 24 Transparent member C1 Center axis C2 Center line

Claims (2)

A main body having an insertion portion to be inserted into the socket;
A dome-shaped cover attached to the main body,
An LED unit including an LED light source, housed in the cover,
The insertion portion is horizontal to the socket, or when attached to be inclined vertically, so that the LED light source becomes lower facing, pivotable in conjunction each of the cover and the LED unit An LED bulb. It includes an LED bulb according to claim 1, and a socket in which the insertion portion of the LED bulb is inserted, and a portion for supporting the part and the socket for supporting the body of the LED bulb, the LED bulb luminaire the insertion portion is positioned above side of the LED light source.

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