(a) Technical Field of the Invention
The present invention generally relates to lighting devices, and more particularly to a lighting device for illumination when opening a lock under insufficient lighting.
(b) Description of the Prior Art
Using a key to open a door lock or any other kind of lock is something people do in their daily lives. Aiming and inserting the elongated blade of the key into the tiny keyhole is not difficult when there is sufficient ambient light. However, it is quite common an experience for all people to fumble for the keyhole when opening a lock in the dark or during the night. For senior people or people with inferior eyesight, they are troubled simply when there is insufficient ambient light for them to locate the keyhole.
The primary purpose of the present invention is to provides a lighting device for illumination when opening a lock under insufficient lighting.
The lighting device mainly contains a key holding member and a casing member. The bow of a key is fixedly housed inside the key holding member with the blade of the key sticking out in the front. The key holding member in turn is inserted into an opening on the front side of the casing member, and a lamp element is configured right next to the opening.
A terminal of the lamp element is connected to the negative electrode of a battery chamber housed in the back of the casing member. The other terminal of the lamp element is connected to a metallic contact blade floating between the positive electrode of the battery chamber and a press button on the top cover of the casing member. A circuit between the lamp element and the battery chamber is completed when the press button is held down and the contact blade touches the positive electrode, and the lamp element is therefore turned on to provide auxiliary lighting to locate the keyhole.
The foregoing object and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.
Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.
The following descriptions are of exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.
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The lamp element 12 is a light emitting diode or a miniature light bulb, whose two terminals are connected to the contact blade 16 and the negative electrode blade 152, respectively.
A sliding mechanism is configured between the sliding cover 14 and the enclosure of the casing member 1, which contains matching tracks 13 and rails 141 configured along the lateral sides of the enclosure and the sliding cover 14 respectively. A curved slit is carved on the sliding cover 14 to form a floating, resilient, semi-circular press button 142 on the sliding cover 14.
The key holding member 2 contains a top cap element 21 and a matching bottom cap element 22, joined together by a locking mechanism including corresponding hooked edges 211 and 221 along the lateral and back sides of the top and bottom cap elements 21 and 22 respectively. The bow of a key 3, after being applied double-sided scotch tapes to its both sides, is laid flat and sealed inside the key holding member 2. The blade of the key 3 sticks out of the front side of the key holding member 2.
To put the lighting device into use, one or more batteries 5 are installed inside the battery chamber 15 and the sliding cover 14 is slid to seal the exposed space along the track and rail 13 and 141. Then, as shown in
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It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.
While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention.