Adjustable fixing structure and illumination apparatus

An adjustable fixing structure includes a main body, a first fixing element and at least one second fixing element. The main body has a containing space, a containing cavity communicating with the containing space and at least one opening communicating with the containing space. The opening is disposed corresponding to the containing cavity, and a light shaft is adapted to be disposed in the containing space. The first fixing element is movably disposed in the containing cavity of the main body. The second fixing element is movably disposed in the opening of the main body. The first and the second fixing elements are moved along an axis to lean against the light shaft, so as to fix the light shaft in the containing space.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefit of China application serial no. 201611174923.4, filed on Dec. 19, 2016. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.

BACKGROUND OF THE INVENTION

Field of the Invention

The invention relates to a fixing structure and an illumination apparatus and more particularly, to an adjustable fixing structure and an illumination apparatus using the adjustable fixing structure.

Description of Related Art

In a design of a street lamp of the related art, a light shaft fixing holder is disposed on a side of the lamp and used to fix a light shaft. Generally speaking, a size (i.e., a bore diameter) of the light shaft fixing holder of the related art may be substantially classified into to three types i.e., 48 mm, 60 mm and 76 mm, and a suitable light shaft fixing holder may be selected according to the size of the light shaft. That is to say, during the installation process of the street lamp, in the presence of light shaft with a different size, the light shaft fixing holder originally disposed on the lamp has to be replaced with a suitable light shaft fixing holder, thereby fixing the light shaft to the lamp through the light shaft fixing holder. In this way, the installation and use become more inconvenient.

SUMMARY OF THE INVENTION

The invention provides an adjustable fixing structure capable of fixing various light shafts with different sizes.

The invention further provides an illumination apparatus including the adjustable fixing structure capable of fixing various light shafts with different sizes on a lamp.

An adjustable fixing structure of the invention is adapted to be disposed on a lamp of an illumination apparatus to fix a light shaft of the illumination apparatus. The adjustable fixing structure includes a main body, a first fixing element and at least one second fixing element. The main body has a containing space, a containing cavity communicating with the containing space and at least one opening communicating with the containing space. The at least one opening is disposed correspondingly to the containing cavity, and the light shaft is adapted to be disposed in the containing space. The first fixing element is movably disposed in the containing cavity of the main body. The at least one second fixing element is movably disposed in the opening of the main body. The first fixing element and the at least one second fixing element are moved along an axis to respectively lean against the light shaft, so as to fix the light shaft in the containing space.

In an embodiment of the invention, the main body has a plurality of fixing holes which communicate with the containing cavity and are opposite to one another, and the first fixing element includes a positioning plate and at least one first locking unit. The positioning plate has a plurality of positioning holes with different heights. The first locking unit sequentially penetrates through one of the fixing holes of the main body, one of the positioning holes and another one of the fixing holes of the main body, so as to position the positioning plate in the containing cavity of the main body.

In an embodiment of the invention, a moving direction of the positioning plate is perpendicular to a locking direction of the first locking unit.

In an embodiment of the invention, a fixing portion is on a side of the main body, and a bore diameter of the light shaft is proportional to a distance of the positioning plate with respect to the fixing portion.

In an embodiment of the invention, the positioning holes with different heights define a step-like positioning hole.

In an embodiment of the invention, a vertical distance is between the first fixing element and the second fixing element, and the vertical distance is proportional to the bore diameter of the light shaft.

An illumination apparatus of the invention includes a lamp, a light shaft and an adjustable fixing structure. The adjustable fixing structure is disposed on the lamp to fix the light shaft. The adjustable fixing structure includes a main body, a first fixing element and at least one second fixing element. The main body has a containing space, a containing cavity communicating with the containing space and at least one opening communicating with the containing space. The at least one opening is disposed correspondingly to the containing cavity, and the light shaft is adapted to be disposed in the containing space. The first fixing element is movably disposed in the containing cavity of the main body. The at least one second fixing element is movably disposed in the opening of the main body. The first fixing element and the at least one second fixing element are moved along an axis to respectively lean against the light shaft, so as to fix the light shaft in the containing space.

In an embodiment of the invention, the main body has a plurality of fixing holes which communicate with the containing cavity and are opposite to one another, and the first fixing element includes a positioning plate and at least one first locking unit. The positioning plate has a plurality of positioning holes with different heights. The first locking unit sequentially penetrates through one of the fixing holes of the main body, one of the positioning holes and another one of the fixing holes of the main body, so as to position the positioning plate in the containing cavity of the main body.

In an embodiment of the invention, a moving direction of the positioning plate is perpendicular to a locking direction of the first locking unit.

In an embodiment of the invention, a fixing portion is on a side of the main body, and a bore diameter of the light shaft is proportional to a distance of the positioning plate with respect to the fixing portion.

In an embodiment of the invention, the positioning holes with different heights define a step-like positioning hole.

In an embodiment of the invention, a vertical distance is between the first fixing element and the second fixing element, and the vertical distance is proportional to the bore diameter of the light shaft.

To sum up, the first fixing element and the at least one second fixing element of the adjustable fixing structure of the invention are moved along an axis to respectively lean against the light shaft located in the containing space of the main body. Therefore, all light shafts with the sizes that allows them to be disposed in the containing space of the main body can be fixed in the containing space of the main body by the first fixing element and the at least one second fixing element. In other words, the adjustable fixing structure of the invention can be used to fix various light shafts with different sizes. As being compared with the related art in which various light shafts with different sizes have to be fixed by using the light shaft fixing holders with different sizes, the adjustable fixing structure of the invention can achieve preferable use convenience and flexibility to effectively reduce development cost and enhance product competitiveness in the market.

DESCRIPTION OF EMBODIMENTS

FIG. 1Ais a schematic partial perspective view showing an illumination apparatus according to an embodiment of the invention.FIG. 1Bis a schematic exploded view showing a part of elements of an adjustable fixing structure of the illumination apparatus depicted inFIG. 1A.FIG. 2Ais a schematic perspective view of a light shaft fixed by the adjustable fixing structure depicted inFIG. 1A.FIG. 2Bis a schematic side view ofFIG. 2A.FIG. 2Cis a schematic cross-sectional view ofFIG. 2A.

Referring to bothFIG. 1AandFIG. 1Bfirst, an illumination apparatus100includes a lamp200, a light shaft300and an adjustable fixing structure400. The adjustable fixing structure400is disposed on the lamp200, so as to fix the light shaft300. The lamp200may include a plurality of light emitting units (not shown) used to emit light for illumination. One end of the light shaft300is fixed by the adjustable fixing structure400, and the other end of light shaft300is fixed onto the ground. In this case, the illumination apparatus100is, for example, a street lamp, but the invention is not limited thereto.

Referring toFIG. 2A,FIG. 2BandFIG. 2C, the adjustable fixing structure400includes a main body410, a first fixing element420and at least one second fixing element430(schematically illustrated as two herein). The main body410has a containing space412, a containing cavity414communicating with the containing space412and at least one opening416(schematically illustrated as two herein) communicating with the containing space412. The openings416are disposed correspondingly to the containing cavity414, and the light shaft300is adapted to be disposed in the containing space412. The first fixing element420is movably disposed in the containing cavity414of the main body410. The second fixing elements430are movably disposed in the openings416of the main body410. The first fixing element420and the second fixing elements430are moved along an axis A to respectively lean against the light shaft300, so as to fix the light shaft300in the containing space412.

Specifically, referring toFIG. 1Bagain, the main body410of the adjustable fixing structure400of the present embodiment has a plurality of fixing holes418(schematically illustrated as four herein) which communicate with the containing cavity414and are opposite to one another, and the first fixing element420includes a positioning plate422and at least one first locking unit424(schematically illustrated as two herein). The positioning plate422has a plurality of positioning holes P1, P2and P3with different heights. The positioning hole P2is located between the positioning hole P1and the positioning hole P3, a vertical height of the positioning hole P1with respect to the light shaft300is greater than a vertical height of the positioning hole P3with respect to the light shaft300. Herein, the positioning holes P1, P2and P3with different heights on the positioning plate422may define a step-like positioning hole, and the light shaft300may be positioned in one of the positioning holes P1, P2and P3with different heights according to a bore diameter of the light shaft300.

Additionally, the first locking unit424is embodied as being composed of a screw bolt424aand a screw nut424b, but the invention is not limited thereto. Each of the first locking units424sequentially penetrates through one of the fixing holes418of the main body410, the positioning hole P2(or the positioning hole P1or the positioning hole P3) and another one of the fixing hole418of the main body410, so as to position the positioning plate422in the containing cavity414of the main body410. Each of the second fixing elements430is also embodied as a combination of a screw bolt and a screw nut, but the invention is not limited thereto. In addition, a fixing portion415is provided on a side of the main body410of the adjustable fixing structure400, and the fixing portion415is locked onto the lamp200through a screw, so as to fix the adjustable fixing structure400to the lamp200.

As illustrated inFIG. 1B,FIG. 2A,FIG. 2BandFIG. 2C, a moving direction D1of the positioning plate422of the first fixing element420is perpendicular to a locking direction D2of each of the first locking units424in the present embodiment. Namely, the positioning plate422of the first fixing element420is inserted into the containing cavity414along the moving direction D1, the positioning plate422is locked to the main body410along the locking direction D2by the first locking units424, and the moving direction D1and the locking direction D2are substantially perpendicular to each other. When the light shaft300is inserted in the containing space412of the main body410of the adjustable fixing structure400, the positioning plate422of the first fixing element420is moved down (in the same direction as the moving direction D1) along the axis A to lean against the light shaft300, and the second fixing elements430are moved upward along the axis A to lean against the light shaft300. Then, the positioning plate422is locked to the main body410along the locking direction D2by the first locking units424, the second fixing elements430are also locked onto the main body410along the direction of the axis A, so as to fix the light shaft300in the containing space412of the main body410of the adjustable fixing structure400.

In addition, referringFIG. 2A,FIG. 2C,FIG. 3A,FIG. 3C,FIG. 4AandFIG. 4Csimultaneously, bore diameters of light shafts300,300′ and300″ are proportional to a distance of the positioning plate422with respect to the fixing portion415. As the positioning holes P1, P2and P3with different heights on the positioning plate422define a step-like positioning hole in the present embodiment, positions of the positioning holes P1, P2and P3vary with the light shafts300,300′ and300″ having different bore diameters. As a result, as the bore diameter of one of the light shafts300,300′ and300″ (for example, the light shaft300′) increases, the distance of the positioning plate422with respect to the fixing portion415becomes far (i.e., the first locking unit424is locked in the positioning hole P3). Otherwise, as the bore diameter of one of the light shafts300,300′ and300″ (for example, the light shaft300″) decreases, the distance of the positioning plate422with respect to the fixing portion415becomes close (i.e., the first locking unit424is locked in the positioning hole P1).

Additionally, referring toFIG. 2B,FIG. 3BandFIG. 4Bsimultaneously, a vertical distance H, H′ or H″ is between the first fixing element420and each of the second fixing elements430, and each of the vertical distances H, H′ and H″ is proportional to the bore diameter of each of the light shafts300,300′ and300″. Actually, the vertical distances H, H′ and H″ are approximately equal to the bore diameters of light shafts300,300′ and300″ and are variable values. Thus, as the bore diameter of one of the light shafts300,300′ and300″ (for example, the light shaft300′) increases, the vertical distance H, H′ or H″ (for example, the vertical distance H′) between the first fixing element420and the second fixing element430increases. Otherwise, as the bore diameter of one of the light shafts300,300′ and300″ (for example, the light shaft300″) increases, the vertical distance H, H′ or H″ (for example, the vertical distance H″) between the first fixing element420and the second fixing element430also decreases.

In brief, through the design of the adjustable fixing structure400of the present embodiment, each of the light shafts300,300′ and300″ with difference sizes may be fixed through the adjustable fixing structure400of the present embodiment, which provides preferable use convenience and flexibility. Moreover, the illumination apparatus100using the adjustable fixing structure400of the present embodiment may achieve effectively reducing development cost and enhancing product competitiveness in the market.

In light of the foregoing, the first fixing element and the second fixing elements of the adjustable fixing structure of the invention are moved along an axis to respectively lean against the light shaft located in the containing space of the main body. Therefore, all the light shafts with the sizes that allows them to be disposed in the containing space of the main body can be fixed in the containing space of the main body by the first fixing element and the second fixing elements. In other words, the adjustable fixing structure of the invention can be used to fix various light shafts with different sizes. As being compared with the related art in which various light shafts with different sizes have to be fixed by using light shaft fixing holders with different sizes, the adjustable fixing structure of the invention can achieve preferable use convenience and flexibility to effectively reduce development cost and enhance product competitiveness in the market.