JP2013251239A - Adapter for light bulb - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adapter for a light bulb used when an incandescent light bulb of downlight is exchanged to an LED light bulb, and that can arbitrarily adjust a lighting direction by the LED light bulb, and further can arrange the LED light bulb as high as possible to prevent appearance reduction caused by downward projection of a lower end of the LED light bulb from a lamp case.SOLUTION: An adapter for a light bulb comprises: a power supply connection part 30 having a metal cap 31 for power supply connection removably connected to a power supply socket 3 for a light bulb; a light bulb connection part 40 having a socket 41 for light bulb connection to which a metal cap 13 of an LED light bulb 10 is connected; and a movable supporting part 50 freely rotatably supported by the power supply connection part 30 around a first axis L1 along a center line of the metal cap 31 for power supply connection, and supporting the light bulb connection part 40 freely rotatably around a second axis L2 perpendicular to the first axis L1 three-dimensionally or two-dimensionally, and position-adjustably in a direction of a third axis L3 perpendicular to the first and second axes L1 and L2.

Description

  The present invention relates to a light bulb adapter that can be suitably used for a downlight.

  In recent years, from the viewpoint of energy saving, replacement work for exchanging incandescent light bulbs of lighting fixtures with LED light bulbs using light emitting diodes (LEDs) has been widely performed even in ordinary households.

  By the way, LED bulbs have the advantages of low power consumption and long life compared to incandescent bulbs, but they have directivity in the direction of light irradiation and cannot irradiate light in all directions like incandescent bulbs. Therefore, there are the following problems.

  That is, as the downlight installed on the ceiling of the entrance, an incandescent bulb attached in a slanting manner in a slanting downward direction with respect to the vertical direction is widely used. If it is replaced with a light bulb, there is a problem in that it cannot sufficiently illuminate directly under the downlight and cannot be used.

  Therefore, in order to solve such a problem, an LED bulb adapter that is detachably attached to a socket for an incandescent bulb, and has a power connection base that is detachably screwed to a power socket for the bulb. A power supply connection part, a light bulb connection part having a light bulb connection socket into which a light bulb base is screwed, and a movable supported rotatably with respect to the power supply connection part and along the axial direction of the power supply connection part An LED bulb adapter having a support portion and a movable support portion that rotatably supports the light bulb connection portion around an axis orthogonal to the axial direction of the power supply connection portion has been proposed and put into practical use ( For example, see Patent Document 1.)

  In the LED light bulb adapter described in Patent Document 1, the movable support portion is rotated with respect to the power supply connection portion, and the light bulb connection portion is rotated with respect to the movable support portion, so that the light can be lighted according to the user's preference. The irradiation direction of the lamp can be adjusted, and the movable support part is moved along the axial direction of the power supply connection part, so that the bottom of the downlight has a hemispherical shape, a truncated cone shape, or a bottomed cylindrical lamp case. The center of the LED bulb is arranged on the center line, and the socket for the bulb can be effectively used.

JP 2011-181379 A

  However, in the LED bulb adapter described in Patent Document 1, the light bulb is connected such that the power connection portion and the movable support portion are connected to the obliquely arranged power socket, and the LED bulb is arranged vertically. Since the connection portion and the LED bulb are supported by the movable support portion, the lower end portion of the LED bulb is arranged at a position lower than the lower end portion of the incandescent bulb when the incandescent bulb is attached to the power socket, and the lower portion of the LED bulb Protrudes downward from the lamp case, and there is a problem that the appearance of the downlight is lowered.

  Further, in the LED bulb adapter described in Patent Document 1, since the conductive circuit is configured by connecting the conductive metal plates at the movable part, the number of parts is large, the structure is complicated, and the assembly is good. It was not. In addition, once the angle of the LED bulb adapter is adjusted, basically there is no need to adjust the angle, so there is almost no merit in complicating the energizing circuit, and conversely, there is a concern about the occurrence of poor contact. There is a problem.

  Furthermore, the present inventor has found that the LED light bulb adapter disclosed in Patent Document 1 moves the movable support portion along the axial direction of the power supply connection portion so that the center of the LED light bulb is centered on the bottom surface of the lamp case of the downlight. Although it is configured so that it can be placed on the line, even if the center of the LED bulb is slightly deviated from the center line of the lamp case of the downlight, adjusting the angle of the LED bulb hardly reduces the function as an illumination I found out.

  An object of the present invention is a light bulb adapter that can be used when replacing an incandescent bulb of an incandescent light bulb with an LED bulb, and can arbitrarily adjust the direction of illumination by the LED bulb. An object of the present invention is to provide an adapter for a light bulb that is arranged on the upper side and can prevent deterioration of the appearance due to the lower end of the LED light bulb projecting downward from the lamp case.

  A light bulb adapter according to the present invention includes a power connection portion having a power connection base that is detachably connected to a power socket for a light bulb, a light bulb connection portion having a light bulb connection socket to which a light bulb base is connected, A movable support portion supported by a power supply connection portion so as to be rotatable about a first axis along a center line of the power supply connection base, and the bulb connection portion intersects the first axis three-dimensionally or planarly. And a movable support portion that is rotatable about the second axis and that is capable of adjusting the position in a third axis direction intersecting the first and second axes.

  In this light bulb adapter, the light bulb adapter power connection part is attached to the light bulb power socket, the light bulb is then attached to the light bulb connection part of the light bulb adapter, and then the direction of the light bulb is turned around the first axis and the second axis. You can adjust the direction of the light bulb. Further, by adjusting the position of the light bulb connecting portion in the third axis direction, for example, the height of the light bulb can be adjusted. For this reason, when the incandescent bulb of the downlight installed on the ceiling of the entrance or the like is replaced with an LED bulb, for example, the bulb connection portion is positioned as high as possible in the lamp case. In addition, after adjusting the position of the bulb connecting portion in the third axis direction (height direction) with respect to the movable support portion of the bulb adapter, the power connection cap of the bulb adapter is connected to the power socket, The LED bulb is attached to the socket for connecting the bulb, and then the direction of the LED bulb can be adjusted around the first and second axes to adjust the direction of light emitted from the LED bulb, the same as when using an incandescent bulb In addition, it is possible to illuminate directly under the downlight. Moreover, the lower end portion of the LED bulb protrudes downward from the lamp case by adjusting the height position of the bulb connecting portion according to the depth of the lamp case and arranging the LED bulb as high as possible on the lamp case. This can be prevented as much as possible, and the appearance of the downlight can be prevented from deteriorating due to the lower end of the LED bulb protruding downward from the lamp case.

  Here, an annular portion having an opening penetrating in the third axial direction is provided in the movable support portion, and a pair of guide slits elongated in the third axial direction on both sides of the annular portion on the axis of the second axis. A pair of shaft portions in the second axial direction that fits in both guide slits is provided in the middle of the bulb connection portion, the bulb connection portion is a movable support portion in the opening, and the shaft portion is the center. It is a preferred embodiment that it is attached so as to be rotatable and to be adjustable in position in the third axial direction along the guide slit. In this case, with a simple configuration, the light bulb connection portion can be attached to the movable support portion so as to be rotatable around the second axis and to be adjustable in the third axis direction.

  It is also a preferred embodiment that a narrow portion that holds the shaft portion in the third axial direction so as to be position-adjustable is formed in the middle portion of the guide slit in the third axial direction. In this case, with a simple configuration in which the narrow portion is formed, the bulb connecting portion can be held in the third axis direction with respect to the movable support portion so that the position can be adjusted at two or more positions.

  An elongated auxiliary slit along the guide slit is formed on at least one side of the guide slit, and the shaft portion is moved in the third axial direction by utilizing the elasticity of the material of the intermediate wall portion between the guide slit and the auxiliary slit. It is also a preferred embodiment to hold the position adjustable. In this case, the simple configuration of using the elasticity of the material of the intermediate wall portion between the guide slit and the auxiliary slit makes it possible to adjust the position of the shaft portion in the third axis direction without increasing the number of parts. Can hold well.

  It is also a preferred embodiment that the power supply connection base and the light bulb connection socket are electrically connected by a wiring cord. In the present invention, since the direction of the light bulb is only adjusted by the light bulb adapter, the range of rotation and rotation of the light bulb around the first axis and the second axis is extremely limited. Even if the socket for connecting the light bulb is directly electrically connected with the wiring cord, an unreasonable force does not act on the wiring cord. The energization circuit of the connection socket can be greatly simplified.

  In a preferred embodiment, the power socket is a power socket of a downlight, the third axis direction is a vertical direction, and the light bulb connected to the light bulb connection socket is an LED light bulb. Although it is possible to attach an incandescent bulb to the adapter for the bulb, it is preferable to attach an LED bulb because the direction of light irradiation can be adjusted. Moreover, this adapter for light bulbs is suitable for a downlight. That is, as described above, since the incandescent bulb is attached obliquely with respect to the vertical direction in the downlight, it is not possible to illuminate directly under the downlight if the bulb is replaced with an LED bulb. Even when the LED light bulb is replaced, it is preferable because it is possible to illuminate directly under the downlight and to prevent the lower end portion of the LED light bulb from protruding downward from the lamp case of the downlight as much as possible. However, this light bulb adapter can also be applied to lighting fixtures other than the lamp case.

  According to the light bulb adapter of the present invention, the power supply connection portion of the light bulb adapter is attached to the power socket for the light bulb, then the light bulb is attached to the light bulb connection portion of the light bulb adapter, and then the direction of the light bulb is turned around the first axis. And the direction of the light bulb can be adjusted by adjusting around the second axis. Further, by adjusting the position of the light bulb connecting portion in the third axis direction, for example, the height of the light bulb can be adjusted. For this reason, when the incandescent bulb of the downlight installed on the ceiling of the entrance or the like is replaced with an LED bulb, for example, the bulb connection portion is positioned as high as possible in the lamp case. In addition, after adjusting the position of the bulb connecting portion in the third axis direction (height direction) with respect to the movable support portion of the bulb adapter, the power connection cap of the bulb adapter is connected to the power socket, The LED bulb is attached to the socket for connecting the bulb, and then the direction of the LED bulb can be adjusted around the first and second axes to adjust the direction of light emitted from the LED bulb, the same as when using an incandescent bulb In addition, it is possible to illuminate directly under the downlight. Moreover, the lower end portion of the LED bulb protrudes downward from the lamp case by adjusting the height position of the bulb connecting portion according to the depth of the lamp case and arranging the LED bulb as high as possible on the lamp case. This can be prevented as much as possible, and the appearance of the downlight can be prevented from deteriorating due to the lower end of the LED bulb protruding downward from the lamp case.

Downlight vertical section Perspective view of the bulb adapter with the LED bulb assembled Disassembled perspective view of LED bulb and bulb adapter Front view of light bulb adapter with LED light bulb assembled Top view of the bulb adapter with the LED bulb assembled Longitudinal sectional view of the bulb adapter with the LED bulb assembled VII-VII sectional view of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this Embodiment is a thing at the time of applying the adapter for light bulbs with respect to a downlight, in order to replace the incandescent light bulb of a downlight with an LED light bulb.

  As shown in FIG. 1, the downlight 1 has a truncated cone-shaped lamp case 2 that opens downward, a power socket 3 for an incandescent lamp, and a power socket 3 fixedly supported on the oblique upper side of the lamp case 2. It is embedded and installed through an opening 6 formed in a ceiling 5 such as an entrance. The power socket 3 is supported by the mounting bracket 4 so as to be inclined with respect to the vertical direction so that the light emitting portion of an incandescent lamp (not shown) attached thereto is disposed in the upper central portion of the lamp case 2.

  The light bulb adapter 20 according to the present invention is used in such a downlight 1 when the LED light bulb 10 is attached to the power socket 3 instead of the incandescent light bulb. However, it is also possible to attach an incandescent light bulb to the light bulb adapter 20 instead of the LED light bulb 10, and this light bulb adapter 20 can be applied to lighting fixtures other than the downlight 1 using the incandescent light bulb.

  The LED bulb 10 includes a truncated cone-shaped base part 11, a base 13 fixed to an end part on the small diameter side of the base part 11 via an insulating member 12, and a substrate fixed to an end part on the large diameter side of the base part 11. 14, a transparent hemispherical globe 15 attached to the end of the base 11 on the large diameter side so as to cover the substrate 14, an LED element 16 attached to the surface of the substrate 14 on the globe 15 side, and an LED element And a lighting circuit (not shown) having a well-known configuration in which the LED element 16 is caused to emit light and the light is irradiated to the outside through the globe 15.

  As shown in FIGS. 1 to 7, the light bulb adapter 20 is connected to a power connection portion 30 having a power connection base 31 that is detachably connected to a power socket 3 for the light bulb and a base 13 of the LED light bulb 10. A light bulb connection portion 40 having a light bulb connection socket 41, and a movable support portion 50 supported on the power supply connection portion 30 so as to be rotatable about a first axis L1 along the center line of the power supply connection base 31; The position of the bulb connecting portion 40 can be rotated around a second axis L2 that intersects the first axis L1 three-dimensionally or planarly and is adjusted in the direction of the third axis L3 that intersects the first and second axes L1 and L2. The movable support part 50 supported so that it is possible is provided. However, the first axis L1 can be disposed on the center line of the power connection base 31 or can be disposed in parallel with the center line of the power connection base 31. It is also possible to arrange them with a slight angle with respect to the center line of 31. In addition, the second axis L2 may be configured to intersect with the first axis L1 in a three-dimensional manner, or may be configured to be arranged in the same plane as the first axis L1. Also good. Furthermore, the first axis L1 and the second axis L2 are preferably orthogonal, but may be arranged to intersect at an angle other than 90 °. Further, it is preferable that the third axis L3 is arranged in the vertical direction in a state where the light bulb adapter 20 is assembled to the downlight 1.

  The power connection portion 30 includes a cylindrical support member 32 made of an insulating material, a screw-type power connection base 31 attached to the outer end of the support member 32 in an outer fitting shape, and a bottom surface of the power connection base 31. A central electrode 33 is provided in the central portion so as to protrude outward through an insulating material.

  The bulb connecting portion 40 includes a bottomed cylindrical outer case 42, a bottomed cylindrical inner case 43 fitted in the outer case 42, and a screw-type bulb connection socket 41 fitted in the inner case 43. And a central terminal 44 attached to the central portion of the back end surface of the inner case 43. The bulb connection socket 41 and the central terminal 44 are fixed to the outer case 42 together with the inner case 43 by two fixing screws 45. .

  The LED bulb 10 is attached to the bulb connecting portion 40 by screwing the cap 13 thereof to the bulb connecting socket 41, whereby the central electrode 17 of the LED bulb 10 and the central terminal 44 of the bulb connecting portion 40 are electrically connected. At the same time, the base 13 of the LED bulb 10 and the bulb connection socket 41 of the bulb connection portion 40 are electrically connected. One end portions of two wiring cords 21 are electrically connected to the light bulb connecting socket 41 and the central terminal 44 of the light bulb connecting portion 40, respectively, and both the wiring cords 21 pass through a gap between the outer case 42 and the inner case 43. The other end is electrically connected to the power connection base 31 and the center electrode 33 of the power connection 30. In this way, the light bulb connection socket 41 and the central terminal 44 are electrically connected to the power connection base 31 and the center electrode 33 by the two wiring cords 21, respectively. Can be configured very easily.

  The movable support portion 50 is composed of a pair of divided bodies 50A and 50B that can be divided in a vertical plane including the center line of the power supply connection base 31, and is engaged with the distal end side of one divided body 50A. A claw 51 is formed, and a recessed portion 52 that can be engaged with the engaging claw 51 is formed on the tip end side of the other divided body 50B. Both divided bodies 50A and 50B engage the engaging claw 51 with the recessed portion 52. The front end portion is coupled and the base end portion is fixed by two fixing screws 53.

  In order to rotatably support the movable support portion 50 with respect to the power supply connection portion 30, a small diameter cylindrical portion 34 is formed at the base end portion of the support member 32 of the power supply connection portion 30. An annular groove 35 is formed. In addition, in a state where the pair of divided bodies 50A and 50B are combined, a cylindrical portion 54 that is externally fitted to the small-diameter cylindrical portion 34 of the power supply connection portion 30 is formed at the proximal end portion of the movable support portion 50. An annular protrusion 55 that fits into the annular groove 35 is formed inwardly, and the movable support portion 50 cannot move in the direction of the first axis L1 due to the concave and convex fitting between the annular groove 35 and the annular protrusion 55. And it is attached to the power supply connection portion 30 so as to be rotatable around the first axis L1.

  As shown in FIG. 7, one locking projection 36 is formed on the outer peripheral portion of the distal end of the small-diameter cylindrical portion 34 so as to protrude outward, and the cylindrical portion 54 of the movable support portion 50 has a locking projection 36. A rotation restricting protrusion 56 that engages and restricts the rotation of the movable support portion 50 is formed to protrude inward, and the movable support portion 50 is about 330 with respect to the power supply connection portion 30 about the first axis L1. It is configured to be able to rotate within a range of degrees. Note that the locking protrusion 36 and the rotation restricting protrusion 56 are configured to be disposed at opposite circumferential positions with the first shaft L1 in between, with the LED bulb 10 facing directly downward. Thus, the LED bulb 10 can be rotated as wide as possible to both sides around the first axis L1 from the state in which the LED bulb 10 is directed downward. Further, in order to prevent twisting of the wiring cord 21 when the LED bulb 10 is rotated around the first axis L1, the locking projection 36 and the rotation regulating projection 56 are opposite to each other across the first axis L1. It is preferable to connect the wiring cord 21 so that the wiring cord 21 is not twisted in a state where the wiring cord 21 is arranged at the circumferential position.

  In a state where the pair of divided bodies 50A and 50B are combined, the movable support portion 50 is formed with an annular portion 58 having an opening 57 penetrating in the vertical direction, and in the middle of the divided bodies 50A and 50B in the longitudinal direction. A pair of elongate guide slits 59 is provided in the third axis L3 direction (substantially up and down direction), and in the middle of the height direction of the outer case 42 of the bulb connecting part 40 along the both guide slits 59 in the up and down direction. A pair of shaft portions 46 that are fitted so as to be movable are formed so as to protrude in the direction of the second axis L2. The guide slit 59 has a pair of upper holding projections 60 that hold the shaft portion 46 at the upper portion of the guide slit 59 and a pair of lower holding projections 61 that hold the shaft portion 46 at the lower portion of the guide slit 59 and project inwardly. A narrow portion 62 having a smaller diameter than the shaft portion 46 is formed between the upper holding projections 60 and the lower holding projections 61. An elongated auxiliary slit 63 along the guide slit 59 is formed on at least one side of the guide slit 59, and the shaft portion 46 is utilized by utilizing the elasticity of the material of the intermediate wall portion 64 between the guide slit 59 and the auxiliary slit 63. Can be held at the upper or lower portion of the guide slit 59 so that the position can be switched. A plurality of holding protrusions are formed at intervals in the height direction of the guide slit 59 to form a plurality of narrow portions 62, and the shaft portion 46 can be held between the adjacent narrow portions 62. And it is also possible to comprise so that the height of the light bulb connection part 40 can be switched in multiple steps in the vertical direction. Further, when the auxiliary slit 63 is provided, the shaft portion 46 can be stably held at the upper or lower portion of the guide slit 59, but the auxiliary slit 63 can be formed only on one side of the guide slit 59. However, it can be omitted. Further, instead of the guide slit 59, a guide groove extending in the vertical direction is formed inside the annular portion 58 so as to open toward the inside of the annular portion 58, and the end portion of the shaft portion 46 is fitted into the guide groove. Thus, it is possible to support the bulb connecting portion 40 so that the position of the bulb connecting portion 40 can be switched in the height direction. Furthermore, it is also possible to form a slit or a groove on the outer case 42 side and to form a shaft portion that fits into the slit or groove on the movable support portion 50 side.

  When attaching the LED bulb 10 to the downlight 1 using the bulb adapter 20, the shaft portion 46 is moved along the guide slit 59, and the third axis L <b> 3 of the bulb connection portion 40 with respect to the movable support portion 50 is moved. With the position of the direction (height direction) switched according to the depth of the lamp case 2, the power connection base 31 of the power connection portion 30 of the light bulb adapter 20 is screwed into the power socket 3, and the downlight A light bulb adapter 20 is attached to one power socket 3. In this state, the LED bulb 10 is screwed into the bulb connection socket 41, the LED bulb 10 is attached, and the orientation of the LED bulb 10 is adjusted around the first axis L1 and around the second axis L2, for example, The LED bulb 10 illuminates the downlight 1 directly below.

  Thus, in this light bulb adapter 20, the direction of the LED light bulb 10 can be adjusted around the first axis L1 and the second axis L2, so that the direction of light irradiation by the LED light bulb 10 can be adjusted. Light can be irradiated directly underneath. Further, since the height position of the bulb connecting portion 40 can be adjusted according to the depth of the lamp case 2, the LED bulb 10 is arranged on the back side of the lamp case 2 as shown by a virtual line in FIG. It is possible to prevent the lower end portion of the LED bulb 10 from projecting downward from the lamp case 2 as much as possible, and the appearance of the downlight 1 is reduced due to the lower end portion of the LED bulb 10 projecting downward from the lamp case 2. Can be prevented.

  The embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and it goes without saying that the configuration can be changed without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Downlight 2 Lamp case 3 Power socket 4 Mounting bracket 5 Ceiling 6 Opening 10 LED bulb 11 Base part 12 Insulating member 13 Base 14 Board | substrate 15 Globe 16 LED element 17 Central electrode 20 Light bulb adapter 21 Wiring cord 30 Power supply connection part 31 Power supply base 32 Support member 33 Center electrode 34 Small diameter cylindrical portion 35 Annular groove 36 Locking projection 40 Light bulb connection portion 41 Light bulb connection socket 42 Outer case 43 Inner case 44 Central terminal 45 Fixing screw 46 Shaft portion 50 Movable support portion 50A Divided body 50B Divided body 51 Engaging claw 52 Recessed part 53 Fixing screw 54 External fitting cylinder part 55 Annular protrusion 56 Rotation restricting protrusion 57 Opening part 58 Annular part 59 Guide slit 60 Upper holding protrusion 61 Lower holding protrusion 62 Width Narrow part 63 Auxiliary slit 64 Intermediate wall part L1 First axis L2 Second axis L3 Third axis

Claims (6)

A power connection portion having a base for power connection that is detachably connected to a power socket for a light bulb;
A light bulb connection portion having a light bulb connection socket to which a light bulb base is connected;
A movable support portion supported by a power supply connection portion so as to be rotatable about a first axis along a center line of the power supply connection base, and the bulb connection portion intersects the first axis three-dimensionally or planarly. A movable support portion that is rotatable about a second axis and that is adjustable in position in a third axis direction intersecting the first and second axes;
A light bulb adapter characterized by comprising:   An annular portion having an opening penetrating in the third axial direction is provided in the movable support portion, and a pair of guide slits elongated in the third axial direction are provided on both sides of the annular portion on the axis of the second axis, A pair of shaft portions in the second axial direction that are fitted in both guide slits are provided in the middle of the bulb connection portion, and the bulb connection portion can be rotated around the shaft portion as a movable support portion within the opening portion. The light bulb adapter according to claim 1, wherein the adapter is attached so as to be positionally adjustable in the third axis direction along the guide slit.   The light bulb adapter according to claim 2, wherein a narrow portion that holds the shaft portion so that the position of the shaft portion can be adjusted in the third axis direction is formed in the middle portion of the guide slit in the third axis direction.   An elongated auxiliary slit along the guide slit is formed on at least one side of the guide slit, and the shaft portion is moved in the third axial direction by utilizing the elasticity of the material of the intermediate wall portion between the guide slit and the auxiliary slit. The adapter for light bulbs according to claim 2 or 3, wherein the adapter is held so as to be adjustable in position.   The light bulb adapter according to any one of claims 1 to 4, wherein the power supply connection base and the light bulb connection socket are electrically connected by a wiring cord. The said power socket is a power socket of a downlight, the said 3rd axis direction is an up-down direction, and the light bulb connected to the said socket for light bulb connection is an LED light bulb. Adapter for light bulbs.

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