WO2014119101A1

WO2014119101A1 - Lamp

Info

Publication number: WO2014119101A1
Application number: PCT/JP2013/081489
Authority: WO
Inventors: 寺沢　徳晃
Original assignee: シャープ株式会社
Priority date: 2013-01-31
Filing date: 2013-11-22
Publication date: 2014-08-07

Abstract

Provided is a lamp whereby cost reduction and smaller size are achieved and it is possible to improve reliability of a lighting instrument. A linear lamp (1) comprises: a light source part wherein LED elements are arrayed linearly; a linear cover (9) which houses the light source part; and metal cap parts (5) which attach lamp pins (6) which are connected to the light source part at the end faces and engage with both ends of the linear cover (9). The metal cap parts (5) are shaped from a resin in a cylindrical shape which is closed off on one end. Protrusion part (7) are disposed in either the outer circumference face of the linear cover (9) or the inner circumference faces of the metal cap parts (5), and engagement parts (10) which the protrusion parts (7) engage therewith are disposed in the other thereof. The engagement parts (10) further comprise gaps (S) which are disposed in the longitudinal direction of the linear cover (9) between the engagement parts and the protrusion parts (7) which engage therewith.

Description

lamp

The present invention relates to a straight tube type lamp having a light source unit composed of LEDs.

A conventional lamp is disclosed in Patent Document 1. The straight tube lamp has a straight tube cover and a base part fitted on both ends of the straight tube cover. The straight tube cover is formed to extend in the longitudinal direction of the straight tube cover, and houses a light source unit composed of LEDs and a heat sink that dissipates heat generated by the light source unit.

The base part is connected to the light source part, and a lamp pin attached to the socket of the lighting fixture is projected from the end face, and is fitted on both ends of the straight tube cover. Further, the base part has a first main body part and a second main body part that are divided by a plane perpendicular to the end face. After the first body part and the second body part are integrated with a metal screw, the base part is fitted on the straight pipe cover, and both are fixed by an adhesive.

JP 2012-99414 A

However, according to the conventional lamp, the base part is formed by screwing the first and second main body parts and is fixed to the straight pipe cover with an adhesive. For this reason, there has been a problem that the cost increases because the number of manufacturing steps of the lamp increases.

Also, since metal screws are exposed in the base, a high withstand voltage is required for safety. For this reason, there has been a problem that the cap portion is enlarged in order to ensure insulation between the lamp pin and the screw. In addition, when the straight tube cover thermally expands due to heat generated by the light source part, there is a problem that the entire length of the lamp including the base part is extended, and there is a problem that the socket of the lighting fixture is pressed along with the extension of the lamp and the reliability of the lighting fixture is lowered. .

An object of the present invention is to provide a lamp capable of reducing the cost and downsizing and improving the reliability of a lighting fixture.

In order to achieve the above object, the present invention provides a light source unit in which LED elements are arranged side by side, a straight tube cover for housing the light source unit, and a lamp pin connected to the light source unit attached to an end surface of the straight tube cover. In a straight tube lamp having a base part fitted on both ends, the base part is formed into a bottomed cylindrical shape with resin, and one of the outer peripheral surface of the straight pipe cover and the inner peripheral surface of the base part A projection part is provided on the other side, and an engagement part with which the projection part is engaged is provided on the other side. The straight pipe cover is provided between the engagement part and the projection part engaged with the engagement part. It has the clearance gap provided in the longitudinal direction of this.

Further, in the lamp having the above configuration, the engaging portion is a groove portion recessed in a peripheral surface of the straight tube cover or the base portion.

Further, the lamp having the above-described configuration is characterized in that a packing for sealing between the straight tube cover and the base part on the opposite side of the lamp pin with respect to the protrusion is provided.

Further, in the lamp having the above configuration, the straight tube cover is formed of a resin.

Further, in the lamp having the above-described configuration, the engaging portion and the protruding portion are formed so as to have a plurality of the engaging portion and the protruding portion, and the circumferential position of the base portion is uniquely determined. Features.

According to the present invention, the mouthpiece portion is formed into a bottomed cylindrical shape with a resin, and the protrusion is provided on one of the outer peripheral surface of the straight tube cover and the inner peripheral surface of the mouthpiece portion, and the protrusion engages with the other. Since the engaging portion has a gap provided in the longitudinal direction of the straight pipe cover between the engaging portion and the protruding portion engaged with the engaging portion, the engaging portion is engaged with the engaging portion. The base part can be easily attached to the straight pipe cover. Therefore, the cost of the lamp can be reduced.

Also, since the metallic screw is not exposed on the surface of the base part, the size of the base part can be reduced. In addition, even if the straight tube cover or heat sink expands due to heat generated by the light source, the projection slides in the longitudinal direction with respect to the engaging part, so that fluctuations in the overall length of the lamp can be suppressed and the reliability of the lighting fixture Can be improved.

The perspective view which shows the lamp | ramp of 1st Embodiment of this invention. The top view which shows the lamp | ramp of 1st Embodiment of this invention. AA sectional view of FIG. Sectional drawing along the axial direction of the lamp | ramp of 1st Embodiment of this invention. BB sectional view of FIG. Horizontal sectional view showing a lamp of a second embodiment of the present invention Vertical sectional view showing a lamp of a third embodiment of the present invention Vertical sectional view showing a lamp of a fourth embodiment of the present invention

<First Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a perspective view and a plan view of the lamp 1 of the first embodiment, and FIG. 3 shows a cross-sectional view taken along line AA of FIG. The lamp 1 has a straight tube cover 9 and a base part 5.

The straight pipe cover 9 is formed into a straight pipe shape with resin and has translucency. Moreover, the resin material of the straight pipe cover 9 is transparent or milky white containing a diffusing material depending on the application. Thereby, the light from the light source part 13 mentioned later can be diffused.

A light source 13 and a heat sink 14 are accommodated in the straight tube cover 9. The light source unit 13 is formed by arranging a plurality of LED elements 12 side by side on a substrate 12a extending in the longitudinal direction.

The heat sink 14 is formed to extend in the longitudinal direction of the straight tube cover 9 in contact with the opposite side of the LED element 12 with respect to the substrate 12a. The heat sink 14 has a U-shaped vertical cross section, is formed of a metal such as aluminum, and is held on the straight pipe cover 9 by an adhesive or is fitted and held on the straight pipe cover 9. When the heat generation amount of the light source unit 13 is low, the lamp 1 is formed with a structure in which the heat sink 14 is not used.

The base part 5 is formed into a bottomed cylindrical shape with resin, and a pair of lamp pins 6 connected to the LED elements 12 project from the end surfaces 5a of the base part 5 fitted to both ends of the straight tube cover 9 and are attached. It is done. The lamp pin 6 is attached to the socket of the lighting fixture.

FIG. 4 shows a cross-sectional view along the axial direction of the end portion of the lamp 1. FIG. 5 is a cross-sectional view taken along the line BB in FIG. Protrusions 7 project from two locations on the inner peripheral surface of the base 5. The protrusion 7 has an inclined surface 7 a that is inclined toward the outer peripheral side as the distance from the lamp pin 6 increases.

An engaging portion 10 that engages with the protruding portion 7 is provided on the peripheral surface of the straight pipe cover 9. The engaging portion 10 is formed by a long hole extending in the axial direction of the straight tube cover 9. Therefore, the engaging portion 10 has a gap S provided in the longitudinal direction of the straight tube cover 9 between the engaging portion 10 and the protruding portion 7 engaged with the engaging portion 10. Thereby, when the base part 5 is fitted on the straight pipe cover 9, the projecting part 7 is slidable in the longitudinal direction.

Further, a packing 8 is provided on the opposite side of the lamp pin 6 with respect to the protruding portion 7 so as to seal a radial gap between the straight tube cover 9 and the base portion 5. In addition, the protrusion part 7 and the engaging part 10 may be provided in one place, and may be provided in three or more places.

When the base part 5 is fitted on the straight pipe cover 9, the projecting part 7 engages with the engaging part 10 and the base part 5 is prevented from coming off. At this time, the protruding portion 7 can be easily engaged with the engaging portion 10 by the inclined surface 7a. Further, even if the heat sink 14 and the straight tube cover 9 are thermally expanded due to the heat generated by the LED element 12, since the gap S is provided, the protrusion 7 is slid relative to the engaging portion 10 and absorbed. The Thereby, the fluctuation | variation of the lamp | ramp 1 full length can be suppressed, and the load with respect to the socket with which the lamp pin 6 is mounted | worn can also be prevented.

According to the present embodiment, the base part 5 is formed into a bottomed cylindrical shape with resin, and the projection part 7 is provided on one of the outer peripheral surface of the straight tube cover 9 and the inner peripheral surface of the base part 5, and the projection part 7 is provided on the other side. Since the engaging portion 10 has a gap S provided in the longitudinal direction of the straight tube cover 9 between the engaging portion 10 and the protruding portion 7 engaged with the engaging portion 10. The base portion 5 can be easily attached to the straight tube cover 9 by the engagement between the protrusion 7 and the engaging portion 10. Therefore, the cost of the lamp 1 can be reduced.

Further, since the metallic screw is not exposed on the surface of the base part 5, the size of the base part 5 can be reduced. In addition, even if the straight tube cover 9 and the heat sink 14 are thermally expanded due to the heat generated by the light source unit 13, the projection 7 slides in the longitudinal direction with respect to the engaging unit 10, and therefore fluctuations in the overall length of the lamp 1 can be suppressed. In addition, the reliability of the lighting fixture can be improved.

Further, since the engaging portion 10 is a long hole recessed in the peripheral surface of the straight pipe cover 9, the protruding portion 7 can be easily slidably held.

In addition, you may form by the groove part extended in the longitudinal direction dented in the internal peripheral surface of the straight pipe cover 9, replacing the engaging part 10 with a long hole. Thereby, it can reduce that the gas which degrades LED element performances, such as sulfide gas, flows in through a long hole, and can improve the reliability of the light source part 13. FIG.

Further, since the packing 8 disposed on the opposite side to the lamp pin 6 with respect to the protrusion 7 is provided, the sulfide gas is prevented from flowing through the gap between the base 5 and the straight tube cover 9, and the light source The reliability of the part 13 can be improved.

In the present embodiment, the protruding portion 7 may be provided on the outer peripheral surface of the straight tube cover 9, and the engaging portion 10 formed of a long hole or a groove portion may be provided on the inner peripheral surface of the base portion 5. Further, the straight pipe cover 9 may be formed of glass. At this time, the relative position variation of the base part 5 due to the thermal expansion of the heat sink 14 can be absorbed by the relative sliding movement of the protrusion 7 with respect to the engaging part 10.

Second Embodiment
Next, a second embodiment will be described. In the present embodiment, the arrangement of the engaging portion 10 and the protruding portion 7 is different from that of the first embodiment. Other parts are the same as those in the first embodiment. FIG. 6 shows a part of a horizontal sectional view of the lamp 1 of the present embodiment. For convenience of explanation, the same parts as those in the first embodiment are denoted by the same reference numerals.

The protrusion 7 and the engaging portion 10 are provided at two locations on the peripheral surface of the base portion 5 and the straight pipe cover 9, respectively. Each protrusion 7 and the engaging portion 10 are arranged at different positions in the longitudinal direction. Thereby, the position of the base part 5 in the circumferential direction is uniquely determined. For this reason, when the polarities of the pair of lamp pins 6 are determined, it is possible to prevent erroneous attachment of the cap portion 5. You may provide the protrusion part 7 and the engaging part 10 in three or more places. At this time, at least two protrusions 7 and engaging portions 10 may be arranged at different positions in the longitudinal direction.

According to this embodiment, the same effects as those of the first embodiment can be obtained. Moreover, since the engaging part 10 and the projection part 7 are formed so that the circumferential position of the base part 5 is uniquely determined, when the polarities of the pair of lamp pins 6 are respectively determined, erroneous mounting of the base part 5 is prevented. can do.

<Third Embodiment>
Next, a third embodiment will be described. In the present embodiment, the sizes of the engaging portion 10 and the protruding portion 7 are different from those of the first embodiment. Other parts are the same as those in the first embodiment. FIG. 7 shows a main part of a vertical sectional view of the lamp 1 of the present embodiment. For convenience of explanation, the same parts as those in the first embodiment are denoted by the same reference numerals.

The protrusion 7 and the engaging portion 10 are provided at two locations on the peripheral surface of the base portion 5 and the straight pipe cover 9, respectively. Each protrusion 7 and engagement portion 10 are formed in different widths in the circumferential direction. Thereby, the position of the base part 5 in the circumferential direction is uniquely determined. For this reason, when the polarities of the pair of lamp pins 6 are determined, it is possible to prevent erroneous attachment of the cap portion 5. You may provide the protrusion part 7 and the engaging part 10 in three or more places. At this time, it is only necessary to form at least two protruding portions 7 and engaging portions 10 with different widths in the circumferential direction.

According to this embodiment, the same effects as those of the first and second embodiments can be obtained.

<Fourth embodiment>
Next, a fourth embodiment will be described. The present embodiment is different from the first embodiment in the number and arrangement locations of the engaging portions 10 and the protruding portions 7. Other parts are the same as those in the first embodiment. FIG. 8 shows a main part of a vertical sectional view of the lamp 1 of the present embodiment. For convenience of explanation, the same parts as those in the first embodiment are denoted by the same reference numerals.

The protrusion 7 and the engaging portion 10 are provided in a rotationally asymmetric manner at three locations on the peripheral surface of the base portion 5 and the straight tube cover 9, respectively. Thereby, the position of the base part 5 in the circumferential direction is uniquely determined. For this reason, when the polarities of the pair of lamp pins 6 are determined, it is possible to prevent erroneous attachment of the cap portion 5. You may provide the protrusion part 7 and the engaging part 10 in two places or four places or more in a rotationally asymmetrical manner.

According to the present invention, the present invention can be used for a straight tube type lamp having a light source portion composed of LEDs.

1 Lamp 5 Base 6 Lamp Pin 7 Projection 7a Inclined Surface 8 Packing 9 Straight Tube Cover 10 Engaging Portion (Elongated Hole)
12 LED element 12a Substrate 13 Light source 14 Heat sink S Gap

Claims

A light source unit in which LED elements are arranged side by side, a straight tube cover that houses the light source unit, and a cap unit that is attached to both ends of the straight tube cover by attaching lamp pins connected to the light source unit to the end surface. In a straight tube lamp,
The base part is molded into a bottomed cylindrical shape with resin, and a protrusion is provided on one of the outer peripheral surface of the straight pipe cover and the inner peripheral surface of the base part, and the engaging part is engaged with the protrusion on the other side. Is provided,
The lamp is characterized in that the engaging portion has a gap provided in the longitudinal direction of the straight tube cover between the engaging portion and the protruding portion engaged with the engaging portion.
2. The lamp according to claim 1, wherein the engaging portion is a groove portion recessed in a peripheral surface of the straight pipe cover or the base portion.
The lamp according to claim 1 or 2, further comprising a packing that seals between the straight tube cover and the base portion on the opposite side of the lamp pin with respect to the protrusion.
The lamp according to any one of claims 1 to 3, wherein the straight tube cover is formed of a resin.
A plurality of the engaging portions and the protruding portions;
The lamp according to any one of claims 1 to 4, wherein the engaging portion and the projecting portion are formed so that a circumferential position of the base portion is uniquely determined.