JP-7854867-B2 - Lighting fixture telescopic structure, lighting fixture, and lighting device

JP7854867B2JP 7854867 B2JP7854867 B2JP 7854867B2JP-7854867-B2

Inventors

谷口諭史
梶田明
松井良介
長尾拓

Assignees

三菱電機株式会社
三菱電機照明株式会社

Dates

Publication Date: 20260507
Application Date: 20220620
Priority Date: 20211227

Claims (5)

A long base and A cylindrical outer shell that covers the base and has an opening formed on the longitudinal end face of the base, A lid is attached to the end of the outer shell so as to cover the opening when the end of the outer shell is inserted into the insertion portion, and the end of the outer shell is inserted into the insertion portion. The system comprises a sealing device positioned between the outer shell and the lid in the longitudinal direction, which seals the opening at the end of the outer shell, The aforementioned sealing device is An outer shell sealing portion is positioned in the insertion portion in such a state, and the end of the outer shell is clamped in the circumferential direction in a second direction perpendicular to the first direction which is the longitudinal direction, It comprises a sealing portion formed integrally with the outer sealing portion, which seals the inside of the opening from the outer sealing portion in the second direction, In the first direction, a sealant deformation space is provided between the lid and the sealing portion to allow elastic deformation of the sealant due to movement of the end portion within the insertion portion caused by environmental changes . The outer sealing portion of the sealing device is The outer peripheral portion that contacts the outer surface of the end of the outer shell, The inner circumferential portion that contacts the inner surface of the end of the outer shell, It has a connecting portion that contacts the end face in the first direction of the outer shell and connects the outer periphery and the inner periphery, The insertion portion is a lamp extendable structure having an end space between the lid and the connecting portion of the sealant in the first direction that allows movement of the outer sealing portion along the first direction .
The lamp extension and retraction structure according to claim 1, wherein the sealing device has a connection portion between the outer sealing portion and the sealing portion that faces the sealing device deformation space, and elastic deformation of the connection portion is permitted in the sealing device deformation space.
The lamp extension and retraction structure according to claim 1 or claim 2, wherein the connection portion between the inner circumference and the sealing portion faces the sealing device deformation space, and the elastic deformation of the connection portion is permitted in the sealing device deformation space.
A luminaire comprising the luminaire telescopic structure described in claim 1 or claim 2, and a light source unit disposed on the base.
The luminaire described in claim 4 , A lighting device comprising a lighting fixture that is installed on a mounting part and to which the light fixture is detachably attached.

Description

This disclosure relates to a luminaire extension/contraction structure that accommodates the expansion and contraction of its components, a luminaire, and a lighting device using the luminaire. Conventionally, light source units and lighting fixtures are known that can suppress the generation of excessive stress at the fixing points between structural components when the structural components expand or contract in response to changes in ambient temperature (see, for example, Patent Document 1). The light source unit of the lighting fixture disclosed in Patent Document 1 comprises a light source, a long support member that supports the light source, a waterproof case that houses the support member supporting the light source, and a plurality of fasteners that fix the support member to the waterproof case within the waterproof case. The plurality of fasteners are arranged at intervals along the longitudinal direction of the support member, and at least one of the plurality of fasteners is attached to the support member so as to be movable along the longitudinal direction of the support member. The light source unit described in Patent Document 1 absorbs the difference in expansion and contraction between the support member and the waterproof case due to temperature changes by having a fixing device move relative to the support member. This configuration prevents excessive pressure from being generated at the fixing point between the support member and the waterproof case, thereby preventing malfunctions such as damage to the components caused by temperature changes. Patent No. 6206811 This is a perspective view of a lighting device according to an embodiment.This is a segmented perspective view showing the lighting fixture and luminaire of the lighting device according to the embodiment.This is an exploded perspective view of the lighting device according to the embodiment.This is an enlarged perspective view of one end of the luminaire according to the embodiment.This is a partially disassembled perspective view of one end of the luminaire according to the embodiment.This is an exploded perspective view of one end of the luminaire according to the embodiment.This is an exploded perspective view showing the configuration inside the light-transmitting cover of the light fixture according to the embodiment.This is a cross-sectional view along the longitudinal direction X at one end of the luminaire according to the embodiment.This is a perspective view showing a cross-section along the longitudinal direction X at one end of the luminaire according to the embodiment.This is a perspective view showing a sealing device for a lighting fixture according to an embodiment.This is a cross-sectional view of the surrounding structure, including the sealing device, of the luminaire according to the embodiment.This is a cross-sectional view illustrating the structure around the end cover of a lighting device according to an embodiment.This is an enlarged schematic diagram illustrating the operation of the telescopic structure of the light fixture according to the embodiment.This is an enlarged schematic diagram illustrating the operation of the telescopic structure of the light fixture according to the embodiment.This is a perspective view of the end of a lighting device equipped with a sealing device according to a modified example 1 of the embodiment.This is a perspective view of a sealing device according to a modified example 1 of the embodiment.This is a perspective view of a modified example 2 of the embodiment of the sealing device.This is a cross-sectional view of a modified example 3 of the embodiment of the sealing device.This is a cross-sectional view of a modified example 4 of the embodiment of the sealing device.This is a cross-sectional view of a modified example 5 of the embodiment.This is a cross-sectional view of a modified example 6 of the embodiment of the sealing device. The following description of the luminaire extension structure, luminaire, and lighting device according to the embodiment will be given with reference to the drawings. In each figure, the same or corresponding components are denoted by the same reference numerals, and repetition of the description may be omitted. Furthermore, the luminaire extension structure, luminaire, and lighting device relating to this disclosure are not limited to the embodiments described below, and can be modified in various ways without departing from the spirit of this disclosure. Also, the luminaire extension structure, luminaire, and lighting device shown in the drawings are merely examples of how this disclosure applies, and the scope of application of this disclosure is not limited by the luminaire extension structure, luminaire, and lighting device shown in the drawings. In each drawing, the relative dimensions or shapes of the components may differ from those of the actual parts. Furthermore, in the following explanation, directions, or positions such a