The present invention relates to a portable worklight and in particular to a portable worklight with two switchable lightsources.
Lamps have a variety of forms to suit different needs, floor lamp, wall lamp, table lamp, desk lamp, and many others. To meet the demand of a working place, the lamp design usually requires specific functions. For a car maintenance workshop, for example, the lamps on the workshop usually do not satisfy the need of the maintenance work since the car body or cover, an engine hood or a trunk cover for example, may obstruct the light coming from the lamps on top, and thus the lamps cannot light the area required. Consequently, the emergence of worklight is to meet this specific demand. A conventional worklight usually uses a tungsten wire as light source covered with a mesh metal cage thereon for the protection of its bulb. A hook is disposed on its end for hanging the lamp at the maintenance site to provide lighting. Some operators use a desk lamp instead of worklight and take the advantage of the flexibility of its flexible metallic conduct to change the projection angle of the light. Since the flexible metallic conduct is a hollow structure, in which a power cord runs through, and thus the angle adjustment is restricted by the structure of the flexible metallic conduct itself, leading to a limited change of working angle. Furthermore, if the working angle exceeds its limit, the flexible metallic conduct or power cord may break as a result.
Vehicle maintenance is not limited in handling materials, replacing parts or oil for example. It is sometimes necessary to inspect tubes; for example, in the inspection of the leaking of the refrigerant circulation tubes of the air-condition system, fluorescent agent is first injected into the circulation tubes to mix with fluid in the tubes, and an ultraviolet (UV) tube is projected onto the tubes. In the case of finding a fluorescent agent on certain spots on the tubes, it can be sure that cracks near the spots are responsible for the leaking of fluorescent agent.
Consequently, an ordinary vehicle maintenance site requires both kinds of worklight for conventional lighting and inspecting tube leaking. Purchasing both kinds of worklights will certainly add to the cost, and also the UV worklight is not routinely used. Consequently, it is necessary to design a new electrical connector to overcome the shortcomings described above.
To meet such a demand, the applicant has a long time experience in designing, production, and marketing of the power supply device and lamp design, and understand the drawbacks that different worklights for different purposes are required for some working places, vehicle maintenance shops for example. Thus the applicant proposes the present invention, a portable worklight with two switchable lightsources, which provides double lightsources in a single worklight and adopts a flexible compound cable to replace conventional flexible metallic conduct to increase its service life, as a result of numerous trials and experiments. In order to achieve the object described above, the present invention provides a portable worklight with two switchable lightsources, comprising a main body having a long shell body, in which a power supply unit is disposed to supply power to a main circuit board, which is then further coupled with a switch; a flexible cable coaxially disposed with a first and a second conductors, between which an inner insulated layer is provided, and having a third conductor, which is inserted into the inner insulated layer, and an external insulated layer wrapped over the second conductor, with the end of the cable is connected on the top of the main body and coupled with the switch; and a lampshade having a lamp holder, into which the top of the compound cable is inserted, with the inner chamber of the lamp holder stackingly disposed with the first and second light source modules, which the first light module is coupled with the first and second conductors, and the second light source is coupled with the first and third conductors. Consequently, the switch may be used to selectingly turn on/off the first light source module or the second light source module.
The present invention can be more fully understood by reference to the following description and accompanying drawings, in which:
With reference to
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To protect the first and second light modules 32 and 33, the lampshade 3 is further disposed with a front shade 34 attached on the front end of the lamp holder 31 and a lens 341 is disposed inside the front shade 34 to prevent water or foreign objects from entering thereinto. Moreover, an insulated rear shade 35 is coveringly mounted on the lamp holder 31 to avoid burn as a result of direct contact with the lamp holder 31. A multiple of heat dissipating slots 351 are formed on the surface of the rear shade 35 to promote heat dissipation and to effectively prevent direct contact with the lamp holder 31. As shown in the figures, the front shade 34 is connected with both the lamp holder 31 and the back lampshade 35, such that individual components may be securely fastened without the risk of falling apart. The overall appearance of the present invention after assembly is shown in
With reference to the accompanied figures, when the present invention is being used, one may select the suitable light source by using the switch 131. When one conducts maintenance work on the engine of a car, for example, the present invention may be attached onto an appropriate position of the car body by the magnet 15 on the bottom of the main body 1 and use the switch 131 to select the first light module 32 to turn on the first light source 321 and thus provide suitable lighting for maintenance work. On the other hand, when inspecting tubes leaking, one may select the second light source module 33 by the switch 131 to turn on the light source 331 so as to inspect whether fluorescent agent is leaking or not.
Consequently, with the implementation of a portable worklight with two switchable lightsources, users need not to use separate worklight for lighting and inspection, such that the cost can be reduced. Also, the compound cable itself has the characteristic of flexibility, and, in particular, the first conductor is a metal which is highly flexible and which is a common terminal for both light source modules. The second conductor is a metal mesh net, which is capable of bending with the risk of breaking. Consequently, the first and second conductors may replace the conventional flexible metallic conduct and also have the capability of electrical conductivity. Furthermore, the bottom of the main body is connected with a magnetic object, a magnet for example, to enable the main body suckingly attached onto a car body, such that users mat need to hold worklight when conducting maintenance or inspection. Moreover, the first and second light source modules are stackingly disposed and fastened inside the shade with a front shade at its front to protect the light sources and a rear shade on its back to cover the shade for heat insulation and heat dissipation, which makes a breakthrough to conventional art.
While the invention has been described with reference to the a preferred embodiment thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention, which is defined by the appended claims.
Number | Date | Country | Kind |
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096202831 | Feb 2007 | TW | national |