JP6414735B2 - Light source for illumination - Google Patents

Description

  The present invention relates to an illumination light source including a light emitting module having a light emitting element such as a light emitting diode (LED).

  Semiconductor light emitting devices such as LEDs have been adopted as light sources for various products because of their small size, high efficiency, and long life.

  For example, a conventional light bulb shaped lamp includes an LED module, a globe that covers the LED module, a drive circuit that supplies power to the LED module, a housing that is provided so as to surround the drive circuit, and a base that receives power. Is provided. The LED module includes a substrate and a plurality of LEDs mounted on the substrate.

JP 2006-313717 A

  Conventional bulb-type lamps including the bulb-type lamp described in Patent Document 1 are generally attached to a luminaire having a socket into which a cap of the bulb-type lamp is screwed, and illuminating light is supplied by electric power supplied from the luminaire. To emit. Therefore, the distance from the socket to the light emitting module (for example, LED module) is constant.

  On the other hand, there is a demand to change the position of the light source, and in order to meet this demand, for example, there is a lamp whose overall length can be changed.

  However, in such a lamp, after changing the length, the movable part for changing the length may be rattled due to the influence of wind or the like. It has become.

  An object of the present invention is to provide an illumination light source that can be adjusted in length and has high structural stability in consideration of the above-described conventional problems.

  In order to achieve the above object, an illumination light source according to an aspect of the present invention is an illumination light source including a light emitting module and a housing, and the housing includes a cylindrical first cylindrical body, A cylindrical second cylindrical body inserted into the first cylindrical body and arranged to be axially movable with respect to the first cylindrical body, and each of the inner peripheral surface of the first cylindrical body and the first cylindrical body A first projecting portion, a second projecting portion, and a third projecting portion that are arranged on either one of the outer peripheral surfaces of the two cylinders and contact the other of the inner peripheral surface and the outer peripheral surface at the same position in the axial direction. And (a) the position of the first protrusion and the second protrusion at the center of a circle connecting the position of the first protrusion, the position of the second protrusion, and the position of the third protrusion. A first angle which is an angle formed with the position of the part, and (b) the position of the first protrusion and the position of the third protrusion. It is an angle, each of the second corner, 120 ° or more and less than 180 °.

  According to the present invention, it is possible to provide an illumination light source that can be adjusted in length and has high structural stability.

The perspective view which shows the external appearance of the lightbulb-shaped lamp which concerns on embodiment Exploded perspective view of a light bulb shaped lamp according to an embodiment The figure which shows the cross-sectional outline | summary of the lighting fixture with which the lightbulb-shaped lamp which concerns on embodiment was attached The bottom view of the 1st cylinder concerning an embodiment The bottom view of the 2nd cylinder concerning an embodiment The perspective view which shows the external appearance of the protrusion part provided in the 1st cylinder which concerns on embodiment, and a retaining part Bottom view of the housing according to the embodiment Sectional drawing of the housing | casing in the state in which the 1st cylinder and the 2nd cylinder were combined Sectional drawing of the housing | casing which concerns on the modification 1 of embodiment Sectional drawing of the housing | casing which concerns on the modification 2 of embodiment The figure which shows the cross-sectional shape of the protrusion part which concerns on the modification 3 of embodiment. The perspective view which shows the example of the arrangement position of the group of three protrusion parts in the modification 4 of embodiment

  Hereinafter, a light bulb shaped lamp according to an embodiment of the present invention will be described with reference to the drawings. Each figure is a schematic diagram and is not necessarily illustrated exactly.

  In addition, each of the embodiments and modifications thereof described below show specific examples of the present invention. Numerical values, shapes, materials, constituent elements, arrangement positions of constituent elements, connection forms, and the like shown in the following embodiments and modifications thereof are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments and modifications thereof, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

  In the following embodiments and modifications thereof, a light bulb shaped lamp (LED light bulb) will be described as an example of an illumination light source.

[Overall configuration of bulb-type lamp]
First, the whole structure of the light bulb shaped lamp 1 according to the present embodiment will be described with reference to FIGS.

  FIG. 1 is a perspective view showing an appearance of a light bulb shaped lamp 1 according to an embodiment.

  FIG. 2 is an exploded perspective view of the light bulb shaped lamp 1 according to the embodiment.

  FIG. 3 is a diagram illustrating a cross-sectional outline of a lighting fixture to which the light bulb shaped lamp 1 according to the embodiment is attached.

  In FIG. 2, the alternate long and short dash line drawn in the vertical direction on the paper indicates the lamp axis J (center axis) of the bulb-type lamp 1. The lamp axis J is an axis that serves as a rotation center when the light bulb shaped lamp 1 is attached to a socket of a lighting fixture, and in the present embodiment, coincides with the rotation axis of the base 90.

  In FIG. 2, illustrations of electronic components included in the drive circuit 40 and elements such as lead wires connected to the drive circuit 40 are omitted.

  In FIG. 3, the lighting fixture is shown in cross section and the light bulb shaped lamp 1 is shown in side view so that the outline of the structure of the lighting fixture can be easily understood.

  As shown in FIGS. 1 to 3, the light bulb shaped lamp 1 according to the present embodiment includes a light emitting module 10 and a housing 50.

  The light emitting module 10 is a device that emits light by power supplied from the drive circuit 40 accommodated in the housing 50 in the present embodiment, and includes a substrate 11 and a plurality of light emitting elements 12 mounted on the substrate 11. . In the present embodiment, the substrate 11 is a substantially circular plate-like substrate in plan view, and is disposed in the opening of the first cylindrical body 60.

  Examples of the type of the substrate 11 include a metal base substrate or a ceramic substrate made of alumina or the like.

  In the present embodiment, a plurality (18 in this embodiment) of light emitting elements 12 are mounted on one surface of the substrate 11.

  In the present embodiment, a surface mount device (SMD) type LED element is employed as the light emitting element 12.

  As shown in FIG. 2, the light emitting element 12 which is an SMD type LED element includes a container 12a, an LED chip 12b mounted in the container 12a, and a wavelength conversion material for converting the wavelength of light from the LED chip 12b. And a sealing member 12c.

  In the present embodiment, for example, a blue LED chip that emits blue light is employed as the LED chip 12b. As the blue LED chip, for example, a gallium nitride based semiconductor light emitting element having a central wavelength of 440 nm to 470 nm, which is made of an InGaN based material, is employed. In this case, in order to obtain white light, for example, yttrium-aluminum-garnet (YAG) -based yellow phosphor particles are employed as the wavelength conversion material.

  The drive circuit 40 receives AC power from a base 90 connected by a pair of lead wires (not shown), converts it into DC power, and supplies the converted DC power to the light emitting module 10 via a pair of lead wires (not shown). . The drive circuit 40 includes a circuit board and a plurality of electronic components (not shown) mounted on the circuit board.

  In the present embodiment, the drive circuit 40 is accommodated in the second cylinder 70 and is fixed to the second cylinder 70 by screwing, adhesion, engagement, or the like. In the present embodiment, the drive circuit 40 is arranged in a posture in which the main surface of the circuit board is parallel to the lamp axis J, but the posture in which the drive circuit 40 is arranged is not particularly limited.

  Further, the drive circuit 40 may not have a function of converting AC power into DC power. For example, when direct current power is directly supplied from the lighting fixture to the light bulb shaped lamp 1, the drive circuit 40 is a circuit for adjusting the direct current power supplied from the base 90 to direct current power having characteristics suitable for the light emitting module 10. Just have it.

  In addition, when direct-current power having characteristics suitable for the light emitting module 10 is supplied to the light bulb shaped lamp 1 via the base 90, the light bulb shaped lamp 1 may not include the drive circuit 40. In this case, the base 90 and the light emitting module 10 are connected by a pair of lead wires.

  The casing 50 in the present embodiment is a cylindrical first cylinder 60 and a cylindrical cylinder that is inserted into the first cylinder 60 and arranged so as to be movable in the axial direction with respect to the first cylinder 60. A second cylinder 70. The material of the first cylinder 60 and the second cylinder 70 is, for example, an insulating resin such as polybutylene terephthalate (PBT).

  In the present embodiment, the axial directions of the first cylindrical body 60 and the second cylindrical body 70, both of which are cylindrical, coincide with each other, and both are parallel to the Z axis. Therefore, the axial direction of the housing 50 constituted by the combination of the first cylindrical body 60 and the second cylindrical body 70 is also a direction parallel to the Z axis.

  The housing 50 has at least three protrusions as characteristic elements. Specifically, each of the housings 50 is disposed on one of the inner peripheral surface 60a of the first cylindrical body 60 and the outer peripheral surface 70a of the second cylindrical body 70, and at the same position in the axial direction, A first protrusion, a second protrusion, and a third protrusion that contact the other of the surface 60a and the outer peripheral surface 70a are provided.

  In the present embodiment, the housing 50 includes a first projecting portion 61a, a second projecting portion 61b, and a third projecting portion 61c arranged on the inner peripheral surface 60a of the first cylindrical body 60.

  In the light bulb shaped lamp 1 according to the present embodiment, the housing 50 has these protrusions, so that the backlash of the first cylinder 60 with respect to the second cylinder 70 can be suppressed.

  Note that two flanges 78 are provided on the outer peripheral surface 70a of the second cylindrical body 70 as shown in FIG. These flanges 78 function to prevent the second cylinder 70 from coming out of the first cylinder 60 and to prevent the second cylinder 70 from rotating with respect to the first cylinder 60. Details of the housing 50 will be described later with reference to FIGS. 4A to 7.

  Further, as described above, the casing 50 expands and contracts in the axial direction, and the first cylindrical body 60 can rotate about the axis with respect to the second cylindrical body 70. Therefore, the drive circuit 40 fixed to the second cylinder 70 and the light emitting module 10 are, for example, lead wires having a sufficient length so that the electrical connection is not interrupted by the expansion or contraction or rotation operation. Connected with.

  In the present embodiment, for example, as shown in FIG. 2, a cover 80 having a reflection plate on the inner surface is attached to the end of the first cylindrical body 60 on the side where the light emitting module 10 is disposed. An optical member 81 having optical transparency is disposed in the opening of the cover 80 opposite to the light emitting module 10.

  The optical member 81 is, for example, a member that diffuses and transmits light emitted from the light emitting module 10. The light diffusing function of the optical member 81 is realized by a light diffusing material such as silica or calcium carbonate contained in the resin forming the optical member 81, for example. Further, the light diffusing function may be realized by forming fine irregularities on the inner or outer surface of the resin or glass forming the optical member 81.

  In addition, it is not essential that the optical member 81 has a light diffusing function, and the optical member 81 may have transparency that allows the light emitting module 10 to be visually recognized from the outside.

  The base 90 supplies electric power received from the outside to the drive circuit 40. The base 90 is supplied with AC power from, for example, a commercial power supply of AC 100V.

  The base 90 has a bottomed cylindrical shape made of metal. In the present embodiment, the base 90 is disposed at the end of the second cylinder 70 exposed from the first cylinder 60. For example, an attachment portion (not shown) having a thread formed on the outer peripheral surface is provided at the end portion of the second cylindrical body 70, and the attachment portion is screwed into the base 90. The base 90 is attached to the second cylinder 70.

  The type of the base 90 is not particularly limited, but in the present embodiment, a screwed-type Edison type (E type) base is used. As the base 90, for example, a base such as E26 type, E17 type, or E16 type is adopted.

  As shown in FIG. 3, the light bulb shaped lamp 1 having the above configuration is attached to an embedded lighting device 3 embedded in a ceiling 200 of a building, for example. That is, the light bulb shaped lamp 1 can be used as a downlight that emits illumination light downward from the ceiling side (such as a hallway or a wall).

  The luminaire 3 includes a main body 5 that forms a space for housing the light bulb shaped lamp 1 and a socket 4 connected to a power source. The socket 4 is electrically and mechanically connected to the base 90 by screwing the base 90 of the light bulb shaped lamp 1, and supplies the base 90 with AC power from, for example, a commercial power source.

  Here, the socket 4 is a socket to which a base of Edison type (E type) such as E26 type or E17 type can be attached, and a light bulb shaped lamp such as a general light bulb shaped lamp can be attached to the lighting fixture 3. It is.

  That is, the light bulb shaped lamp 1 according to the present embodiment is a device that can provide illumination light using a general lighting fixture to which a general light bulb shaped lamp can be attached.

  In general, the lighting fixtures including the lighting fixture 3 shown in FIG. 3 have various cover member depths (for example, the width of the main body 5 in FIG. 3 in the Z-axis direction). Therefore, when the light bulb shaped lamp is attached to the luminaire, the position of the tip of the light bulb shaped lamp (the top of the globe), for example, with respect to the cover member differs depending on the type of the luminaire.

  However, the light bulb shaped lamp 1 according to the present embodiment has a housing 50 that can be expanded and contracted, and can maintain a stable state in which rattling or the like is suppressed.

  Therefore, for example, as shown in FIG. 3, the length of the housing 50 can be adjusted so that the light irradiation surface of the light bulb shaped lamp 1 (the outer surface of the optical member 81) approaches the ceiling 200.

  Hereinafter, details of the housing 50 having the above-described features will be described with reference to FIGS. 4A to 7.

[Case details]
4A is a bottom view of the first cylinder 60 according to the embodiment, and FIG. 4B is a bottom view of the second cylinder 70 according to the embodiment. Specifically, FIG. 4A and FIG. 4B show the appearance of the first cylinder 60 and the second cylinder 70 when viewed from below in FIG. 2 (the Z-axis negative side, hereinafter the same).

  FIG. 5 is a perspective view showing the external appearance of the protruding portion and the retaining portion 64 provided on the first cylinder 60 according to the embodiment. Specifically, FIG. 5 illustrates a state in which the first cylindrical body 60 is cut in approximately half along the axial direction. In FIG. 5, the first protrusion 61 a is not shown for the sake of convenience of illustrating about half of the first cylinder 60, but in the present embodiment, the shape and size of the first protrusion 61 a are The second protrusion 61b and the third protrusion 61c are the same.

  FIG. 6 is a bottom view of the housing 50 according to the embodiment. Specifically, FIG. 6 shows an appearance of the housing 50 in a state where the first cylinder 60 and the second cylinder 70 are combined when viewed from below in FIG.

  FIG. 7 is a cross-sectional view of the housing 50 in a state where the first cylinder 60 and the second cylinder 70 are combined. Specifically, FIG. 7 illustrates a cross section orthogonal to the axial direction of the housing 50 at a position where the protruding portions (61a to 61c) exist in the axial direction.

  In the present embodiment, the outer diameter is D2 (D2 <D1) from the opening (lower opening in FIG. 2) of the first cylinder 60 having the inner diameter D1 on the side where the retaining portion 64 is not disposed. A certain second cylinder 70 is inserted. The second cylinder 70 inserted into the first cylinder 60 is prevented from coming out of the first cylinder 60 by the flange 78 provided on the outer peripheral surface 70 a coming into contact with the retaining portion 64.

  In the present embodiment, when the second cylinder 70 is inserted into the first cylinder 60, the three or more projecting portions provided on the first cylinder 60 abut on the second cylinder 70. Thereby, the relative movement of the 1st cylinder 60 and the 2nd cylinder 70 in the radial direction is controlled. In addition, since the height (length in the radial direction) from the inner peripheral surface 60a of the retaining portion 64 is shorter than the height from the inner peripheral surface 60a of the projecting portions (61a to 61c), It is not substantially involved in the regulation of radial movement.

  In this Embodiment, as FIG. 4A shows, the 1st protrusion part 61a, the 2nd protrusion part 61b, and the 3rd protrusion part 61c are arrange | positioned at the internal peripheral surface 60a of the 1st cylinder 60. As shown in FIG. .

  In addition, although these protrusion parts (61a-61c) are formed as an element integral with the 1st cylinder 60, for example, each of the protrusion parts (61a-61c) is produced as another component, and the inside of the 1st cylinder 60 You may attach to the surrounding surface 60a.

  In the present embodiment, each of the first projecting portion 61a, the second projecting portion 61b, and the third projecting portion 61c contacts the outer peripheral surface 70a of the second cylindrical body 70 as shown in FIG.

  That is, the outer diameter D2 of the second cylindrical body 70 (the outer diameter of the portion excluding the flange 78) is the diameter of a circle passing through the vertices of the first protruding portion 61a, the second protruding portion 61b, and the third protruding portion 61c. Designed to be approximately equal.

  Specifically, when the material of the first cylindrical body 60 and the second cylindrical body 70 is PBT and the diameter of a circle passing through the apex of the protruding portions (61a to 61c) is 30 mm, the outside of the second cylindrical body 70 The diameter D2 is, for example, 29.8 mm to 30 mm in design. That is, when manufacturing tolerances are taken into consideration, the second cylinder 70 and the first cylinder 60 are slidable with each other, and it is difficult to insert the second cylinder 70 into the first cylinder 60. The 1st cylinder 60 and the 2nd cylinder 70 are designed so that it may not become.

  For example, when the second cylinder 70 is inserted into the first cylinder 60, each of the three protrusions (61a to 61c) undergoes elastic deformation or plastic deformation, so that the second cylinder 70 and the first cylinder The relative movement in the axial direction of the body 60 is allowed and the relative movement in the radial direction is restricted. Various sizes of the first cylinder 60 and the second cylinder 70 are determined in consideration of the possibility of such an operation.

  Thereby, the axial length of the casing 50 can be adjusted, and the position of the first cylinder 60 relative to the second cylinder 70 (stabilization of backlash) is realized.

  In addition, there is no limitation in particular in the fixing means for fixing the length after adjustment with which the housing | casing 50 is equipped. For example, the length of the housing 50 may be fixed by a pin (not shown) penetrating a part of the first cylinder 60 and a part of the second cylinder 70 in the radial direction. Further, the relative positions in the axial direction of the first cylindrical body 60 and the second cylindrical body 70 may be adjustable in a plurality of stages by a latch structure (not shown) capable of fixing the position in a plurality of stages. Further, the casing 50 does not have a clear fixing means such as a pin, and the length after the adjustment of the casing 50 may be maintained depending on the fixing force by the three protrusions.

  Here, in this embodiment, in order to improve the effect of suppressing the above-described rattling, the position P1 of the first protrusion 61a, the position P2 of the second protrusion 61b, and the position P3 of the third protrusion 61c are as follows: The following conditions are met.

  That is, (a) the position P1 of the first projecting portion 61a and the second projecting portion 61b at the center P0 of a circle (in this embodiment, a circle formed by the inner peripheral surface 60a) connecting P1, P2, and P3. And (b) a second angle θ2 that is an angle formed between the position P1 of the first protrusion 61a and the position P3 of the third protrusion 61c. Is 120 ° or more and less than 180 °.

  More specifically, P1, P2, and P3 are not evenly spaced on the circumference at an interval of 120 °, and when the position is based on the position P1 of the first protrusion 61a, the second protrusion Each of the part 61b and the 3rd protrusion part 61c is arrange | positioned in the position far from an equal position.

  Thereby, the stability of the relative position of the 1st cylinder 60 and the 2nd cylinder 70 which mutually press in a radial direction at three points improves in the radial direction.

  For example, in FIG. 7, the balance of forces in the Y-axis direction for the second cylindrical body 70 is described as follows.

  That is, the second cylinder 70 receives the force F1 in the positive Y-axis direction from the first protrusion 61a. In addition, the second cylinder 70 receives forces F2 and F3 in a direction inclined with respect to the Y axis from the second protrusion 61b and the third protrusion 61c.

  In this case, F1 is balanced with the resultant force of the component F2 ′ of F2 in the Y-axis direction and the component F3 ′ of F3 in the Y-axis direction.

  Here, F2 ′ = cos θa, and as θa approaches 0 °, that is, as the first angle θ1 (see FIG. 4A) approaches 180 °, F2 ′ increases.

  Further, F3 ′ = cos θb, and as θb approaches 0 °, that is, as the second angle θ2 (see FIG. 4A) approaches 180 °, F3 ′ increases.

  Therefore, as the first angle θ1 approaches 180 ° or the second angle θ2 approaches 180 °, the resultant force of F2 ′ and F3 ′ increases, and thus F1 also increases.

  That is, simply speaking, as at least one of the first angle θ1 and the second angle θ2 approaches 180 °, the fixing force in the Y-axis direction between the first cylinder 60 and the second cylinder 70 increases. improves.

  As a result, the effect of suppressing the relative movement of the first cylinder 60 and the second cylinder 70 in the radial direction is improved.

  When both θa and θb are less than 90 °, that is, when both the first angle θ1 and the second angle θ2 are larger than 90 °, both F2 ′ and F3 ′ are larger than 0. That is, the relative movement of the second cylinder 70 in the radial direction with respect to the first cylinder 60 can be restricted.

  However, for example, the second cylinder 70 in the direction between two protrusions adjacent in the circumferential direction (between P1 and P2, between P2 and P3, and between P1 and P3 in FIG. 4A). Considering the possibility of rattling, the uniformity of the positions of the three protrusions (61a to 61c) is required. That is, it is preferable that θ1 and θ2 are 120 °, rather than the case where the first angle θ1 and the second angle θ2 in FIG. 4A are greater than 90 ° and less than 120 °.

  Further, as described above, as each of the first angle θ1 and the second angle θ2 approaches 180 °, as described above, the Y-axis direction (the position P1 of the first protrusion 61a and the center P0 are connected). The fixing force between the first cylinder 60 and the second cylinder 70 in the direction is improved.

  When both the first angle θ1 and the second angle θ2 are 180 °, that is, the second protrusion 61b and the third protrusion 61c overlap, and the second cylinder 70 is aligned in the Y-axis direction. When supported at two points, the stability in the X-axis direction between the first cylinder 60 and the second cylinder 70 decreases.

  Therefore, in the light bulb shaped lamp 1 of the present embodiment, values of 120 ° or more and less than 180 ° are adopted as the values of the first angle θ1 and the second angle θ2.

  Thereby, the fixing force between the 1st cylinder 60 and the 2nd cylinder 70 is improved, As a result, the backlash with respect to the 2nd cylinder 70 of the 1st cylinder 60 is suppressed. As a result, for example, the generation of abnormal noise caused by rattling of the first cylindrical body 60 due to wind or the like is suppressed.

  Further, for example, in order to suppress the backlash of the first cylinder 60, the first cylinder 60 is not provided with the three protrusions (61 a to 61 c), and the inner diameter of the first cylinder 60 and the second cylinder 70 are not provided. A case is assumed in which the first cylindrical body 60 and the second cylindrical body 70 are formed so that their outer diameters substantially coincide with each other. In this case, the frictional force between the inner peripheral surface of the first cylindrical body 60 and the outer peripheral surface of the second cylindrical body 70 becomes excessively large, and the expansion and contraction of the housing 50 is substantially impossible or difficult. However, in the light bulb shaped lamp according to the present embodiment, the second cylindrical body 70 is supported from the radial direction by the three projecting portions (61a to 61c), so that the first cylindrical body 60 has a backlash with respect to the second cylindrical body 70. Both suppression of sticking and smooth expansion and contraction of the housing 50 are possible.

  Here, in case 50 according to the present embodiment, as shown in FIG. 4A, the distance between P2 and P3 is relatively small. Thereby, when the tolerance of the size of each of the first cylinder 60 and the second cylinder 70 is taken into consideration, the first cylinder in the direction between P2 and P3 (direction parallel to or close to the Y-axis direction). The possibility of minute movement (backlash) with respect to the second cylinder 70 of 60 is reduced.

  That is, as compared with the case where the three protrusions (61a to 61c) are evenly arranged on the circumference, the degree of freedom in the play direction is lowered.

  On the other hand, the distance between P1 and P2 and the distance between P1 and P3 are relatively large. However, as described above, the fixing force in the direction connecting the P1 and the center P0 (Y-axis direction) is relatively small. Become bigger. Therefore, as a result, the backlash of the first cylindrical body 60 is suppressed in both the direction between P1 and P2 and the direction between P1 and P3.

  As described above, the light bulb shaped lamp 1 according to the present embodiment is a light bulb shaped lamp that can be adjusted in length and has high structural stability.

  In the present embodiment, for example, as shown in FIG. 4A, the first protruding portion 61a has a vertical line 2 that connects the position P2 of the second protruding portion 61b and the position P3 of the third protruding portion 61c. It is arranged on an equal line.

  Thereby, for example, a shift between the axis of the first cylinder 60 and the axis of the second cylinder 70 can be suppressed at least in a direction parallel to the perpendicular bisector (Y-axis direction). That is, the radial position regulation between the first cylinder 60 and the second cylinder 70 can be performed in a more balanced manner.

  Moreover, in this Embodiment, each of the 1st protrusion part 61a, the 2nd protrusion part 61b, and the 3rd protrusion part 61c is elongate in an axial direction (refer FIG. 5).

  Thereby, for example, the possibility of minute rotation (backlash) of the first cylinder 60 with respect to the second cylinder 70 around the axis parallel to the radial direction is reduced.

  In addition, the light bulb shaped lamp 1 includes a drive circuit 40 housed in a housing 50 for causing the light emitting module 10 to emit light, and a base disposed at an end of the second cylinder 70 exposed from the first cylinder 60. 90, and a base 90 for supplying electric power received from the outside to the drive circuit 40. As the base 90, for example, a general base such as an E26 type common to a light bulb shaped lamp used in a general home can be adopted.

  Therefore, for example, it is possible to attach the light bulb shaped lamp 1 to a lighting fixture provided in a general house, and the total length is adjustable, so that, for example, an appropriate length corresponding to the size of the lighting fixture is obtained. Can be adjusted to.

  Moreover, the structure of the housing | casing 50 which concerns on embodiment may be other than the structure shown by FIGS. Various modifications of the housing 50 will be described with reference to FIGS.

(Modification 1)
In the housing 50 according to the above-described embodiment, the first protrusion 61a is arranged on a vertical bisector of a line segment connecting the position P2 of the second protrusion 61b and the position P3 of the third protrusion 61c. However, this is not essential.

  FIG. 8 is a cross-sectional view of a housing 50 according to Modification 1 of the embodiment.

  As shown in FIG. 8, when the first angle θ1 and the second angle θ2 are different, the first protrusion 61a does not exist on the vertical bisector connecting the line P2 and P3.

  However, even in this case, each of the first angle θ1 and the second angle θ2 may be 120 ° or more and less than 180 °. Accordingly, as described with reference to FIG. 7, the first cylinder 60 and the second cylinder 70 are fixed to each other in the direction (Y-axis direction) connecting the position P1 and the center P0 of the first protrusion 61a. The power is relatively large. As a result, the backlash of the first cylinder 60 with respect to the second cylinder 70 is suppressed.

(Modification 2)
In the embodiment described above, the three or more projecting portions of the first cylinder 60 and the second cylinder 70 that interact with each other are arranged on the inner peripheral surface 60 a of the first cylinder 60. However, three or more protrusions may be disposed on the outer peripheral surface 70 a of the second cylinder 70.

  FIG. 9 is a cross-sectional view of a housing 50 according to the second modification of the embodiment.

  In the housing 50 according to this modification shown in FIG. 9, the first protrusion 71 a, the second protrusion 71 b, and the third protrusion 71 c are arranged on the outer peripheral surface 70 a of the inner second cylindrical body 70. Yes.

  Further, the position P1 of the first protrusion 71a, the position P2 of the second protrusion 71b, and the position P3 of the third protrusion 61c satisfy the following conditions.

  That is, at the center P0 of a circle (in this embodiment, a circle formed by the outer peripheral surface 70a) connecting P1, P2, and P3, (a) the position P1 of the first protrusion 71a and the second protrusion 71b Each of the first angle θ1 that is an angle formed with the position P2 and (b) the second angle θ2 that is an angle formed between the position P1 of the first protrusion 71a and the position P3 of the third protrusion 71c is 120 ° or more and less than 180 °.

  Accordingly, as described with reference to FIG. 7, the fixing force between the first cylinder 60 and the second cylinder 70 in the direction connecting the position P1 and the center P0 of the first protrusion 61a (the Y-axis direction). Is relatively large. As a result, the backlash of the first cylinder 60 with respect to the second cylinder 70 is suppressed.

  When three or more protrusions are arranged on the outer peripheral surface 70a of the second cylinder 70 as in this modification, any one of these protrusions is connected to the retaining part 64 of the first cylinder 60. By coming into contact, the second cylinder 70 can be prevented from coming off from the first cylinder 60.

  Further, the one or more protrusions are provided on the inner peripheral surface 60a of the first cylindrical body 60 so as to come into contact with any one of the three or more protruding portions in the circumferential direction. The first cylinder 60 may be functioned as a detent.

  Further, for example, one of the three protrusions of the housing 50 is disposed on one of the first cylinder 60 and the second cylinder 70, and the remaining two are the first cylinder 60 and the second cylinder. It may be arranged on the other side of the body 70.

(Modification 3)
In the said embodiment, the cross section orthogonal to the axial direction of the three protrusion parts (61a-61c) which the housing | casing 50 has is a triangle. However, the cross-sectional shape of each of the three protrusions (61a to 61c) included in the housing 50 is not limited to a triangle.

  FIG. 10 is a diagram illustrating a cross-sectional shape of the protruding portion according to the third modification of the embodiment. In FIG. 10, two examples of the cross-sectional shape of the first protrusion 61a are shown as representatives of the three protrusions (61a to 61c), but the other protrusions (61b and 61c) are also illustrated in FIG. The cross-sectional shape shown in FIG.

  As shown to (a) of FIG. 10, the front-end | tip part of the 1st protrusion part 61a may form the plane. In this case, for example, the contact area between the first protruding portion 61a and the outer peripheral surface 70a of the second cylindrical body 70 can be increased, and thereby the first protruding portion 61a and the outer peripheral surface 70a of the second cylindrical body 70 can be increased. The frictional force can be increased. That is, the fixing force between the first cylinder 60 and the second cylinder 70 can be improved.

  As shown in FIG. 10B, the tip of the first protrusion 61a may form a curved surface. Specifically, the cross-sectional shape of the first protrusion 61a may be semicircular. In this case, for example, the strength of the first projecting portion 61a can be improved, whereby the first projecting portion 61a is deformed or broken by contact between the first projecting portion 61a and the outer peripheral surface 70a of the second cylindrical body 70, and the like. Can be suppressed. As a result, the stability of the radial position of the first cylinder 60 with respect to the second cylinder 70 can be further improved.

  In addition, the example of the cross-sectional shape of these 1st protrusion parts 61a is applicable also to the three protrusion parts (71a-71b) arrange | positioned at the outer peripheral surface 70a of the 2nd cylinder 70 shown in FIG.

(Modification 4)
In the said embodiment, the group of the three protrusion parts (61a-61c) which the housing | casing 50 has was one. However, the housing 50 may have a plurality of sets of three projecting portions (61a to 61c).

  FIG. 11 is a perspective view illustrating an example of an arrangement position of a set of three projecting portions (61a to 61c) in Modification 4 of the embodiment.

  In addition, in FIG. 11, the 1st cylinder 60 is notionally illustrated by the dotted line so that each position of the group of three protrusion parts (61a-61c) can be visually recognized. The illustration of the second cylinder 70 is omitted.

  In the housing 50 according to this modification, a plurality of sets of the first projecting portion 61a, the second projecting portion 61b, and the third projecting portion 61c are arranged discretely in the axial direction.

  As a result, as in the case where the three protrusions (61a to 61c) are elongated in the axial direction, the first cylindrical body 60 is minute relative to the second cylindrical body 70 about the axis parallel to the radial direction. The possibility of rotation (backlash) is reduced.

  Furthermore, since the contact area between the first cylinder 60 and the second cylinder 70 can be made relatively small, the fixing force between the first cylinder 60 and the second cylinder 70 becomes excessive. Is suppressed. That is, the expansion and contraction of the housing 50 can be facilitated while suppressing the play around the axis parallel to the radial direction.

(Supplement of the embodiment)
In the above embodiment, the casing 50 has two cylinders (the first cylinder 60 and the second cylinder 70). However, the casing 50 has three or more cylinders. May be. That is, the housing | casing 50 has a 3 or more cylinder, and may be expanded-contracted, for example by a telescopic structure.

  Even when the housing 50 has three or more cylinders, a structure in which two cylinders that are in contact with each other press each other in the radial direction via, for example, the three protrusions (61a to 61c) described above. Should be adopted. Accordingly, the light bulb shaped lamp 1 in which the casing 50 has three or more cylindrical bodies, the length of which can be adjusted, and the light bulb shaped lamp 1 having high structural stability can be realized. It is.

  In the above embodiment, the light emitting module 10 is arranged in the first cylinder 60, and the base 90 is arranged in the second cylinder 70 inserted into the first cylinder 60. However, the base 90 may be arranged on the first cylinder 60, and the light emitting module 10 may be arranged on the second cylinder 70 inserted into the first cylinder 60.

  That is, the light emitting module 10 is disposed on one of the second cylinder 70 and the first cylinder 60 that move relatively in the axial direction, and the base 90 is disposed on the other, so that the base 90 and the light emitting module 10 It is possible to change the distance between.

  Further, the light emitting module 10 does not need to be directly attached to the housing 50. For example, the light emitting module 10 may be fixed to a base or a column fixed directly or indirectly to the housing 50. For example, the light emitting module 10 may be fixed to the cover 80.

  In addition, the first cylinder 60 in which the light emitting module 10 is disposed and the cover 80 do not have to be separate. For example, the first cylinder 60 integrally including the cover 80 is manufactured by integral molding of resin. Also good.

  Further, the height and shape of the three protrusions (61a to 61c) in the embodiment in the radial direction are not necessarily the same. The three protrusions (61a to 61c) may have different radial heights or shapes.

  The shape and size of the cover 80 and the optical member 81 included in the light bulb shaped lamp 1 are not particularly limited, and the light bulb shaped lamp 1 may not include the cover 80 and the optical member 81.

  Each of the first angle θ1 and the second angle θ2 (see, for example, FIG. 4A) is 120 ° or more and less than 180 °, but more preferably, the first angle θ1 second Each angle θ2 is greater than 120 ° and less than 180 °.

  Further, the first cylinder 60 does not have to be rotatable about the axis with respect to the second cylinder 70. For example, a part of the second cylinder 70 is always in contact with one of the three protrusions (61a to 61c) arranged on the inner peripheral surface 60a of the first cylinder 60 from the circumferential direction. The rotation of the first cylinder 60 with respect to the second cylinder 70 may be substantially impossible.

  In the present embodiment, the circles passing through P1, P2, and P3 are circles formed by the inner peripheral surface 60a. This is because the positions of the three protrusions (61a to 61c) are defined as the center positions in the circumferential direction on the inner peripheral surface 60a of the protrusions whose cross section is an isosceles triangle (for example, see FIG. 7). . That is, when each of P2 and P3 is defined as, for example, the apex of the three protruding portions (61a to 61c) (the portion that contacts the outer peripheral surface 70a of the second cylinder 70, see FIG. 6), P1, P2, and P3 A circle passing through is defined as a circle passing through these vertices. That is, in this case, the first angle θ1 and the second angle θ2 (see FIG. 8) are specified using circles passing through the apexes of the three protrusions (61a to 61c).

  In the above embodiment, the light emitting element 12 is an SMD type LED element, but is not limited thereto. For example, a COB (Chip On Board) type light emitting module in which a bare chip is directly mounted on a substrate may be employed in the light bulb shaped lamp 1.

  In this case, for example, a sealing member that seals a plurality of LED chips collectively or individually, and by disposing a sealing member including a wavelength conversion material such as the above-described yellow phosphor, The wavelength of the light may be converted to a predetermined wavelength.

  In the above embodiment, the LED is exemplified as the light emitting element. However, a semiconductor light emitting element such as a semiconductor laser, or a solid light emitting element such as an organic EL (Electro Luminescence) or an inorganic EL may be used.

  Other configurations and functions in the above-described embodiments and modifications can be arbitrarily obtained without departing from the spirit of the present invention, or forms obtained by making various modifications conceived by those skilled in the art with respect to the above-described embodiments and modifications. Embodiments realized by combining these are also included in the present invention.

1 Light bulb shaped lamp (light source for illumination)
DESCRIPTION OF SYMBOLS 10 Light emitting module 40 Drive circuit 50 Case 60 1st cylinder 60a Inner peripheral surface 61a, 71a 1st protrusion part 61b, 71b 2nd protrusion part 61c, 71c 3rd protrusion part 70 2nd cylinder 70a Outer surface 90 Base

Claims (5)

An illumination light source comprising a light emitting module and a housing,
The housing is
A cylindrical first cylindrical body, a cylindrical second cylindrical body that is inserted into the first cylindrical body and arranged to be axially movable with respect to the first cylindrical body;
Each is disposed on one of the inner peripheral surface of the first cylindrical body and the outer peripheral surface of the second cylindrical body, and contacts the other of the inner peripheral surface and the outer peripheral surface at the same position in the axial direction. Having a first protrusion, a second protrusion, and a third protrusion,
(A) the position of the first protrusion and the position of the second protrusion at the center of a circle connecting the position of the first protrusion, the position of the second protrusion, and the position of the third protrusion; And (b) each of a second angle that is an angle formed by the position of the first protrusion and the position of the third protrusion is greater than 120 °, and When the angle is less than 180 ° , the first protrusion, the second protrusion, and the third protrusion are not arranged at equal intervals in the circumferential direction of the circle . The illumination light source according to claim 1, wherein the first protrusion is disposed on a perpendicular bisector of a line segment connecting the position of the second protrusion and the position of the third protrusion. The illumination light source according to claim 1, wherein each of the first protrusion, the second protrusion, and the third protrusion is elongated in the axial direction. 4. The illumination light source according to claim 1, wherein a plurality of sets of the first protrusion, the second protrusion, and the third protrusion are discretely arranged in the axial direction. . further,
A drive circuit for emitting light from the light emitting module housed in the housing;
A base disposed on an end portion of the second cylindrical body exposed from the first cylindrical body, the base supplying electric power received from the outside to the drive circuit. The illumination light source according to item.

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