Adjustable lamp structure

An adjustable lamp structure includes a first and a second adapters, an adapter ring, a limiting unit, a heat sink, and a lampshade. The second adapter is configured in the first adapter, and the adapter ring is configured at the second adapter. The adapter ring has a surface facing the second adapter and pillars configured on the surface. The second adapter is engaged with the pillars. The limiting unit is located in the second adapter and fixed at ends of the pillars to limit a moving distance of the second adapter on the pillars. The heat sink is engaged with the adapter ring and located at one side of the adapter ring. The lampshade is configured at one side of the heat sink. The entire length of the lamp structure can be changed by adjusting relative positions of the second adapter and the pillars.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefit of Taiwan application serial no. 100106044, filed on Feb. 23, 2011. 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

1. Field of the Invention

The invention relates to a lamp structure. More particularly, the invention relates to a lamp structure of which the entire length is adjustable.

2. Description of Related Art

The illumination lamps have been transformed into energy-saving light bulbs from light bulbs and fluorescent lamps ever since lamps were invented, and different applications of the illumination lamps lead to different illumination effects.

At present, most lamps individually comply with one single standard. Namely, each of the lamps is required to have one single specification no matter whether the lamps are light tubes or bulbs, no matter what lamp base of each lamp is, and no matter what the lengths, the brightness, and the shapes of the lamps are. Thus, materials complying with individual standards are required when different orders are received from customers, and the manufacturing costs of suppliers cannot be effectively lowered down.

As a result, many researches are conducted by manufacturers in this field for the need of commonly using the lamps with different specifications.

SUMMARY OF THE INVENTION

The invention is directed to an adjustable lamp structure that can catch up with requirements for customization.

In an embodiment of the invention, an adjustable lamp structure suitable for being configured on a lamp base is provided. The adjustable lamp structure includes a first adapter, a second adapter, an adapter ring, at least one limiting unit, a heat sink, and a lampshade. The first adapter is suitable for being configured on the lamp base, and the second adapter is configured in the first adapter. The adapter ring is configured at one side of the second adapter away from the first adapter. Besides, the adapter ring has a surface and a plurality of pillars, and the surface faces the second adapter. The pillars are configured on the surface, and the second adapter is engaged with the pillars. The limiting unit is located in the second adapter and fixed at ends of the pillars away from the surface, so as to limit a moving distance of the second adapter on the pillars. The heat sink is engaged with the adapter ring and located at one side of the adapter ring away from the second adapter. The lampshade is configured at one side of the heat sink relatively away from the first adapter. The entire length of the lamp structure can be changed by adjusting relative positions of the second adapter and the pillars.

According to an embodiment of the invention, the first adapter has an external thread.

According to an embodiment of the invention, a material of the adapter ring is metal, and the pillars are protrusions extending from the surface.

According to an embodiment of the invention, the at least one limiting unit refers to a plurality of screws, and a diameter of a head of each of the screws is greater than an outer diameter of each of the pillars.

According to an embodiment of the invention, the at least one limiting unit includes a cover and a plurality of screws. The cover is configured at the ends of the pillars away from the surface, and the screws pass through the cover and are correspondingly locked to the pillars.

According to an embodiment of the invention, the second adapter has a plurality of first positioning structures, and the adapter ring has a plurality of second positioning structures. The first positioning structures and the second positioning structures are correspondingly buckled, so as to position the second adapter relative to the pillars. When the second positioning structures are protrusions, the first positioning structures are grooves. Alternatively, when the second positioning structures are grooves, the first positioning structures are protrusions. The adapter ring has a first portion and a second portion. The first portion surrounds the second portion, and the surface and the pillars are located on the second portion. The second adapter has a third portion and a fourth portion. The third portion is lodged in the first adapter, and the fourth portion is lodged in the second portion of the adapter ring. The first positioning structures are configured at the third portion, and the second positioning structures are configured at one side wall of the second portion. Alternatively, the second positioning structures are configured at the pillars, and the second adapter further has a fifth portion connected between the third portion and the fourth portion. The first positioning structures are configured at a side surface of the fifth portion in contact with the pillars.

Based on the above, in the adjustable lamp structure described in the embodiments of the invention, the pillars of the adapter ring allow the second adapter to move on the pillars. Thereby, the entire length of the lamp structure can be adjusted based on actual requirements, so as to meet the requirements for customization.

DESCRIPTION OF EMBODIMENTS

FIG. 1is a schematic exploded view illustrating a lamp structure according to an embodiment of the invention.FIG. 2AandFIG. 2Bschematically illustrate an assembly of the lamp structure depicted inFIG. 1and the lamp structure with the adjusted length, respectively. With reference toFIG. 1,FIG. 2A, andFIG. 2B, the adjustable lamp structure100in this embodiment is suitable for being configured on a lamp base. The adjustable lamp structure100includes a first adapter110, a second adapter120, an adapter ring130, at least one limiting unit140, a heat sink150, and a lampshade160. The first adapter110is suitable for being configured on the lamp base, and the second adapter120is configured in the first adapter110. The adapter ring130is configured at one side of the second adapter120away from the first adapter110. Besides, the adapter ring130has a surface132and a plurality of pillars134, and the surface132faces the second adapter120. The pillars134are configured on the surface132, and the second adapter120is engaged with the pillars134. The limiting unit140is located in the second adapter120and fixed at ends of the pillars134away from the surface132, so as to limit a moving distance of the second adapter120on the pillars134. The heat sink150is engaged with the adapter ring130and located at one side of the adapter ring130away from the second adapter120. The lampshade160is configured at one side of the heat sink150away from the first adapter110. The entire length of the lamp structure100can be changed by adjusting relative positions of the second adapter120and the pillars134. As such, the lamp structure100can be applied to meet the requirement for customization.

The adjustable lamp structure100of this embodiment is a light bulb, and the first adapter110of the lamp structure100has an external thread. The adapter ring130can be made of metal or plastic. If the adapter ring130is made of metal, an insulation pad is required for electrical insulation. Besides, the pillars134are protrusions extending from the surface132of the adapter ring130.FIG. 3Ais a schematic three-dimensional view illustrating the assembly of the limiting unit, the second adapter, and the adapter ring.FIG. 3Bis a schematic cross-sectional view taken along a sectional line A-A depicted inFIG. 3A. With reference toFIG. 1,FIG. 3A, andFIG. 3B, the limiting unit140includes a cover142and a plurality of screws144. The cover142is configured at the ends of the pillars134away from the surface132. The screws144pass through the cover142and are correspondingly locked into the pillars134. The cover142is made of plastic. Besides, the cover142restricts the second adapter120to move between the cover142and the adapter ring132along the pillars134. The cover142can also be made of metal, which is determined based on actual requirements.

In another embodiment which is not shown in the drawings, the limiting unit140can also refer to a plurality of screws, and a diameter of a head of each of the screws is greater than an outer diameter of each of the pillars134. Thereby, the second adapter120is also unlikely to be disassembled from the pillars134.

FIG. 3Cis a schematic cross-sectional view taken along a sectional line B-B depicted inFIG. 3A. As indicated inFIG. 3AandFIG. 3C, in order to position the second adapter120relative to the pillars134, the second adapter120can have a plurality of first positioning structures122, and the adapter ring130has two pairs of second positioning structures136and136′. The two pairs of second positioning structures136and136′ are arranged along an axial direction of the pillars134(shown inFIG. 3B). The first positioning structures122can be correspondingly buckled with one set of the second positioning structures136and136′. The first positioning structures122are protrusions, and the second positioning structures136are grooves in this embodiment, which should be construed as an example of the invention. People having ordinary skill in the art can modify the types or the shapes of the first and second positioning structures122and136as long as the first and second positioning structures122and136can be correspondingly buckled to position the second adapter120relative to the pillars134.

As shown inFIG. 1andFIG. 3C, to be more specific, the adapter ring130of this embodiment has a first portion137and a second portion138. The second portion138has a substantially circular shape, and the first portion137surrounds the second portion138. The surface132and the pillars134are located at the second portion138. The second adapter120has a third portion124and a fourth portion126. The third portion124is lodged in the first adapter110, and the fourth portion126is lodged in the second portion138of the adapter ring130. The first positioning structures122are configured at the third portion124, and the second positioning structures136are configured at a side wall of the second portion138. In another embodiment which is not shown in the drawings, the second positioning structures136can also be configured at the pillars134. The second adapter120can have a fifth portion128(shown inFIG. 3B) that is connected between the third portion124and the fourth portion126. The first positioning structures122can be configured at one side of the fifth portion128in contact with the pillars134.

With reference toFIG. 1,FIG. 2A, andFIG. 3C, when the first and second positioning structures122and136are correspondingly buckled, the length of the adjustable lamp structure100is not extended.FIG. 3Dis a schematic cross-sectional view illustrating a portion of the adjustable lamp structure after the lamp structure is lengthened. As indicated inFIG. 1,FIG. 2B, andFIG. 3D, the first adapter110can be manually pulled, such that the second adapter120engaged with the first adapter110moves along the axial direction of the pillars134. The first positioning structures122are disassembled from the second positioning structures136and moved to the second positioning structures136′, and the first and second positioning structures122and136′ are correspondingly buckled. Here, the entire length of the adjustable lamp structure100is increased.

To sum up, in the adjustable lamp structure described in the embodiments of the invention, the pillars of the adapter ring allow the second adapter that passes through the pillars to move on the pillars. Thereby, the relative positions of the second adapter and the pillars can be changed, and the entire length of the lamp structure can be adjusted based on actual requirements, so as to meet the requirements for customization. In addition, the limiting unit can prevent the second adapter from being disassembled from the adapter ring. Moreover, the positioning structures can fix the second adapter onto a certain part of the pillars, such that the second adapter does not unexpectedly slide relative to the adapter ring.

Although the invention has been described with reference to the above embodiments, it will be apparent to one of the ordinary skill in the art that modifications to the described embodiments may be made without departing from the spirit of the invention. Accordingly, the scope of the invention will be defined by the attached claims rather than by the above detailed descriptions.