Energy saving lamp holder

The present invention is to provide an energy saving lamp holder, structurally comprising a body, a set of conducting spring leaves, a set of elastic articles, an anti-backspin guide plate and a positioning plate. When installing an energy saving bulb by inserting the conducting terminals of the bulb in the positioning grooves of the positioning plate for a twist, the anti-backspin guide plate is pressed to move inward and back soon. The anti-backspin guide plate and the contact plate of the conducting spring leaf jointly seize the conducting terminals and refrains the bulb from being back spinning. The energy saving lamp holder disables electric conduction before the completion of the installation of a bulb, which further ensures no possibility of careless electric shock.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to energy saving lamp holders, and relates more particularly to an energy saving lamp holder which is in electric conduction only the whole installation is done, capable of generating anti-backspin blockage, to prevent the installation from possible electric shock and the danger for the bulb to be in backspin.

2. Description of the Prior Art

A conventional lamp holder always accompanies the bulb to be installed in it. Therefore, a variety of structures of lamp holders arise for all kinds of demands which are large in diversity. A prior art energy saving lamp holder1, shown inFIGS. 1-3, comprises a body11, a conducting spring leaf12, an elastic article13and a positioning plate14, where the body11shaped like a saucer is directly fastened to the spot during installation (for instance: the ceiling). A load cylinder111formed in the center of the body includes a set (two pieces) of conducting spring leaves12which are symmetrical in position and are connected to the opposite poles of power supply respectively. The conducting spring leaves12each has at its back an elastic article13which exerts force on the leaf once it is being pressed. Near to the top of the load cylinder111, the positioning plate14is being laid and fastened, where the positioning plate14has at its surface a pair of symmetrical positioning grooves141. Each of the positioning grooves141is further made up of a big hole1411and a connected thin arc groove1412. And each of the positioning grooves141is connected to one of the conducting spring leaves12. During the installation of an energy saving bulb, two conducting terminals16of the bulb are aimed to inserting into the big holes1411of the positioning grooves141, followed by a twist along the thin arc groove1412for a degree until moving to a lodging point121on the conducting spring leaves12(shown inFIG. 3). At this moment, the conducting terminals16each presses the corresponding conducting spring leaf12into a slight bend, which further presses the elastic article13at its back. The conducting terminals16each is seized by a protruded structure which includes the bulges near the lodging point121, preventing the conducting terminals16from back spinning (turning back). Accordingly, the conducting terminals16will be electrically connected to the poles of the power supply through the medium of the conducting spring leaves12, to light the energy saving bulb.

The foregoing prior art energy saving lamp holders are in serious possibility of danger during the installation of an energy saving bulb, which take place as an installer inserted the conducting terminals16of an energy saving bulb into the big holes1411of the positioning grooves141, followed by a twist along the thin arc groove1412to a position ahead of the right lodging point121. At this moment, the conducting terminals16already conducted electrically with the corresponding conducting spring leaves12and the energy saving bulb is lighted; therefore, there could be some possibilities of danger as follows:1. Since the circuit has been conducted to light the bulb at the moment, those who are not familiar with the installation procedure may mistake the action for completion and fail to proceed with the next. The situation looks good in the beginning (turning on and turning off are normal). Since the corresponding conducting spring leaves12are bent and the elastic articles13are compressed, both are in a position with potential energy for engaging a counteraction. Moreover, vibrations arising from uses and thermal effects will push the conducting terminals16spinning back from the corresponding conducting spring leaves12. Once the conducting terminals16spin back to the position of the big holes1411, the energy saving bulb is easy to come off and fall down to ground. The loss could be light as just breaking the bulb that frightens people or serious as hurting people or destroying articles, which means a potential for serious danger.2. For those who are familiar with the installation will keep on spinning the bulb. Since the whole system is electrically conducted, an installer could be hurt for any careless uses with his tools or articles to touch the positioning grooves141during spinning. It is dangerous since an electric shock could be happened before the installer can complete the installation of the bulb.3. Even if the installation is well done in locating the conducting terminals16exactly in the lodging points121, the conducting terminals16could still come off from the lodging points121after a long time use under various vibrations and thermal effects because the protruded structure near the lodging point121are tiny bulges, which the conducting terminals16of the energy saving bulb as times go by will gradually spin back to the position of the big holes1411, the energy saving bulb is then easy to come off same as in item1. This situation is also far from safety.

Therefore, the most serious drawback during the use for the foregoing prior art energy saving lamp holders lies in the electric conduction in the circuit network happened before the installation is completed, which enables a danger of electric shock. The fact is that there is no apparatus set for the prevention of the backspin for the energy saving bulb in the structure of the energy saving lamp holders, and the mentioned drawbacks are thus formed.

Accordingly, the inventor recognized the foregoing described drawbacks and proceeded with further research and improvement, through considerable endeavor and tests, the present invention is eventually accomplished.

SUMMARY OF THE INVENTION

The objective of the present invention is to provide an energy saving lamp holder, which is capable of preventing electric shock from the installation of an energy saving bulb, and preventing the backspin of the energy saving bulb.

To achieve the foregoing objective, the present invention creates an energy saving lamp holder which comprises: a body, saucer-shaped, having a load cylinder at its center and having loaded with a central vessel and a pair of catch troughs, where the load cylinder has a set of deep side cavities; a set of conducting spring leaves, each of which is made of a slice with several folds to form a transverse contact plate, where the conducting spring leaves are located and fastened to the internal of the load cylinder, and both ends of the contact plate are fixed in the catch troughs respectively, where the conducting spring leaves are electrically connected to the poles of power supply external to the lamp holder body; a set of elastic article, fastened to the back of the contact plate, having one end fixed in the corresponding catch trough, featuring to restore the contact plate after the exerting force disappears; an anti-backspin guide plate, lump in shape inside the load cylinder, having slanting walls positioned corresponding to the foregoing conducting spring leaves, and each keeping a distance with the corresponding conducting spring leaf during assembly, forming a downward housing in the middle of its bottom side, for accommodating an elastic element, where the other end is inserted into the central vessel of the body, and the sides of the plate form lodging necks capable of inserting into the side cavities and having pushing chunks at its ends; and a positioning plate, a circular plate fixed in the load cylinder and positioned at its opening, and flanges formed on its rim, which can fit in the side cavities of the load cylinder. The positioning plate has a set of positioning grooves, where each again is divided into a big hole and a connected thin arc groove. The big hole is for the insertion of the conducting terminals of the energy saving lamp and proceed to spin through the thin arc groove.

When installing the energy saving bulb, the conducting terminals will press the anti-backspin guide plate which in turn compresses the elastic article to approach the slanting wall, and further passes the slanting wall to touch the contact plate for enabling electric conduction. The anti-backspin guide plate will be counteracted by the elastic article to move back, and seizes the conducting terminals by jointing with the contact plate, to refrain the conducting terminals from back spinning. When demounting the energy saving bulb, it is to press the pushing chunks to move the anti-backspin guide plate and the lodging neck inward, followed by turning the energy saving bulb to make its conducting terminals spin through the thin arc groove to the big hole, where the conducting terminals exit from the state of being seized, back to the top side of the anti-backspin guide plate, and ready for dismounting.

DETAILED DESCRIPTION OF THE INVENTION

To achieve the foregoing objective of the present invention, the techniques adopted and the achievable function are detailed described with reference to the following preferred example and the accompanying drawings, which is expected to help the honorable Examiner in comprehending the contents of present invention thoroughly.

Please referring toFIGS. 4-5, the example of present invention is an energy saving lamp holder2which comprises:

a body21, in the shape of a saucer (having piercing holes thereon), is directly fastened (threaded) to the spot during installation (for instance: the ceiling), having a load cylinder211at its center, where the load cylinder211embraces a central vessel2111, a set of symmetric piercing holes2112, a set of symmetric catch troughs2113, a set of symmetric linking vessels2114, and a set of deep and symmetric side cavities2115opened on the load cylinder211;

a set of conducting spring leaves22, which are conducting elements made of a slice with several folds, each has an end hole221, and a transverse contact plate222made by a couple of folds. The conducting spring leaf22is put inside the load cylinder211once in assembly, having its end holes221each pointed to a piercing hole2112, by means of a fastener223(for instance: a rivet) for penetrating through the end hole221and the piercing hole2112, and for penetrating into a joint hole2241at one end of a joiner224which is located at the bottom of the body21, followed by a joint (for instance: a rivet joint), such that the conducting spring leaves22has its end hole221standing on the piercing hole2112, through the help of the fastener223to electrically connect the conducting spring leaf22and corresponding joiner224. The joiner224has its another end bent down into a step shape, on which a threaded hole2242is set up, for lodging each of the bolts2243to wire to a pole of power supply and to be screwed to the corresponding threaded hole2242, and conducting to the joiner224and further to the contact plate222of the conducting spring leaf22. The terminals of the contact plate222of the conducting spring leaf22are put into the corresponding catch troughs2113respectively for a lodging (shown inFIGS. 5-6);

a set of elastic article23, suggested selecting a bar-typed spring, where its one end is fastened to the center of the back of the contact plate222, and another end is fixed in the corresponding catch trough2113for a lodging (shown inFIGS. 5-6). Once the contact plate222is pressed by an external force to be bent, the elastic article23at its back is also being compressed. Through the elastic stretch of the elastic article23, the contact plate222is restoring soon after the external force disappears;

a positioning plate24, a circular plate that covers the opening of the load cylinder211, having a flange243formed symmetrically on each of two sides along the rim, and a set of symmetrical positioning grooves241and a set of perforated holes242are opened on the circular plate, where each positioning groove241is divided into a big hole2411and a connected thin arc groove2412; and

an anti-backspin guide plate25, lump in shape, having a downward housing251in the middle of its bottom side, for accommodating an elastic element2511(suggested selecting a bar-typed spring), and both ends are presenting symmetry in structure, where each end comprises a lodging neck252, a pushing chunk253and a slanting wall built in at each side.

When in assembly, the terminals of the conducting spring leaves22and the contact plates222are put in the corresponding catch troughs2113, with their end holes221pointing to the piercing holes2112respectively, where the fastener223is taken for penetrating through the above holes and fixing with the joiner224, and the bottom of the elastic article23is fixed in the catch trough2113(shown inFIG. 5); an elastic element2511is then put in the central vessel2111, followed by pointing the housing251of the anti-backspin guide plate25at the elastic element2511and followed by covering it, and pointing the lodging necks on both sides of the anti-backspin guide plate25at side cavities2115respectively and followed by a lodging. By means of the elastic force of the elastic element2511, the anti-backspin guide plate25can be pressed to move up and down in the load cylinder211, but since both of the lodging necks252are seized respectively in the side cavities2115, which disables the movement of rotation. The slanting walls254each is near a contact plate222, but a distance is kept in between (shown inFIG. 6). The positioning plate24is then taken to cover the opening of the load cylinder211(its bottom is pressing on the anti-backspin guide plate25), and the flanges243of both sides are forced to push against the entrances of the side cavities2115and the lodging necks252of the anti-backspin guide plate25simultaneously (shown inFIG. 7). A fastener2421(for example: a bolt) is taken to penetrate through the perforated hole242to join (screw joint) with the link vessel2114of the load cylinder211, to stabilize the positioning plate24.

The foregoing description is focus on the assembly of the energy saving lamp holder2of the example of the present invention. The forthcoming step is to fix directly the lamp holder2(having piercing holes for accommodating screws to be helically threaded) at the installed spot (for instance: ceiling) to be ready for the installation of energy saving bulb. Referring toFIGS. 7-9, as the energy saving lamp holder2of the example of the present invention is being used for lodging the energy saving bulb, the installer is holding the bulb and pointing the two conducting terminals26(shown inFIG. 9) at the big holes2411of the positioning grooves241respectively and followed by a inserting. The conducting terminals26will touch first the top surface of the anti-backspin guide plate25, with a push and a twist on the energy saving bulb, which is to have its conducting terminals26pressing the anti-backspin guide plate25inward (hence compressing the elastic element2511to be stretched). In the other respect, spinning along the thin arc groove2412, the conducting terminals26arrive at the slanting walls254shortly, and with the push and spin simultaneously, the conducting terminals26soon move through the slanting walls254and across the anti-backspin guide plate25(the conducting terminals26rotate to depart from the top side of the anti-backspin guide plate25). To this point, the conducting terminals26have touched the contact plate222and electrically conducted. Since the anti-backspin guide plate25is free of a push, and the elastic element2511provides restoring force. The conducting terminals26thus will be seized by the contact plate222and the anti-backspin guide plate25, and the contact plate222will be a bit bent subject to the pressing of the conducting terminals26, and the pressing is balanced by the elastic article23at its back. Due to the conducting terminals26being firmly seized, there is no possibility to spin back, which avoids the danger of suddenly being dropped off during uses as in the prior art examples. Moreover, before the conducting terminals26move across the anti-backspin guide plate25, there is no contact to the contact plate222; therefore, no electric conduction in the circuit before the accurate completion of installation, which absolutely abstain from the possibility of electric shock during installation.

As for dismounting the energy saving bulb from the energy saving lamp holder2(for instance: replace the spoiled bulb), one hand should hold the bulb while the other hand presses the pushing chunks253to move the lodging necks inward along the side cavities2115. The movement makes the anti-backspin guide plate25moving inward to touch the tips of the conducting terminals26. With a slight twist on the bulb, the conducting terminals26can be free from the seizure by the contact plate222and the anti-backspin guide plate25, and move along the thin arc groove2412back to the big hole2411, meanwhile, unclasping the pressing on the pushing chunks253(the bulb is still be held). Because the conducting terminals26suddenly come off from the contact with the contact plate222, the electric conduction is ceased immediately, which refrains from the danger of electric shock. Because the tips of the conducting terminals26return to the top side of the anti-backspin guide plate25, the conducting terminals26will be pushed to come off the big hole2411by the outward movement of the anti-backspin guide plate25which is triggered by the restore force of the elastic element2511. At this moment, the energy saving bulb is ready to be taken off from the energy saving lamp holder2.

From the foregoing description, the energy saving lamp holder2of the example of the present invention disables electric conduction before the completion of the installation of the energy saving bulb, which further makes sure no possibility of careless electric shock. It also leaves aside any misconceptions of recognition on completion of installation, which results in dangers of the backspin and suddenly falling of the bulb. Moreover, the energy saving lamp holder2of the present invention can completely avoid the possibility of backspin for the bulb, which completely sure of no uncertainties of danger. Therefore, the present invention has made substantial progresses in improving the drawbacks of prior art examples, and accomplished the expected objective and function.

In general, the disclosed energy saving lamp holder of the present invention has not opened to the public for its whole structure, and absolutely novel. It can completely refrain from the possibility of backspin for the bulb, and further completely sure of no uncertainties of danger, which surely accomplish the expected objective and function of the present invention. It is also construed as being compliant to the requirements for novelty and usefulness of utility patent, and an application is then filed according to the U.S. Patent Statue, which deserves your favorable examination and approval.