MAGNETIC COMPASS
A magnetic compass includes a base having a receiving chamber for receiving a compass body, a battery chamber for receiving a battery set, an illuminant chamber for receiving an illuminant, and a locating chamber for receiving an electrically conductive member. The illuminant has a first terminal suspended above the battery set. A push button is supported on the first terminal of the illuminant for pressing by the user to force the first terminal of the illuminant downwards into contact with a first terminal of the battery set. The conductive member has a base frame mounted in the locating chamber, and a contact portion extended from the base frame and inserted into the battery chamber and pressed on a second terminal of the battery set. A second terminal of the illuminant is electrically connected to the base frame of the conductive member.
1. Field of the Invention
The present invention relates to a magnetic compass and more particularly, to such a magnetic compass that is usable in the dark.
2. Description of the Related Art
Referring to
The present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide a magnetic compass that provides a stable illumination effect.
To achieve this object of the present invention, the magnetic compass comprises a base, a compass body, a battery set, an illuminant, a push button and an electrically conductive member. The base includes a hollow base body and a top cover covering the hollow base body. The hollow base body has a receiving chamber for receiving the compass body, a battery chamber for receiving the battery set, an illuminant chamber for receiving the illuminant, and a locating chamber for receiving the conductive member. The top cover has a through hole corresponding to the battery chamber. The illuminant has a first terminal suspended above the battery set. The push button is supported on the first terminal of the illuminant and movably mounted in the through hole of the top cover for pressing by the user to force the first terminal of the illuminant downwards into contact with a first terminal of the battery set. The conductive member has a base frame mounted in the locating chamber, and a contact portion extended from the base frame and inserted into the battery chamber and pressed on a second terminal of the battery set. A second terminal of the illuminant is electrically connected to the base frame of the conductive member.
BRIEF DESCRIPTION OF THE DRAWINGS
Referring to
Referring to
The compass body 20 is situated within the receiving chamber 114 of the hollow base body 11 of the base 10, comprising a housing 21, a magnetic needle 22 pivotally mounted within the housing 21, an indication card 23 adhered to the top surface of the bottom wall of the housing 21, and an ornamental ring 24 fastened to the top side of the housing 21.
The battery set 30 is comprised of two flat cylindrical lithium batteries, which are arranged in a stack (electrically connected in series), and mounted within the battery chamber 115 with one terminal, for example, the positive terminal aimed at the battery insertion opening 117.
Referring to
The push button 50 is supported on the first terminal 41 of the illuminant 40 above the battery chamber 116 and partially inserted through the through hole 123 of the top cover 12 to the outside of the base 10 for pressing by the user to force the first terminal 41 of the illuminant 40 downwards into contact with the positive terminal of the battery set 30.
Referring to
Referring to
As indicated above, the metal conductive member 60 holds down the battery set 30 in the battery chamber 116, therefore the battery set 30 is constantly maintained in positive contact with the metal conductive member 60. When the user pressed the push button 50 to force the first terminal 41 of the illuminant 40 into contact with the positive terminal of the battery set 30, electricity is provided to the illuminant 40, thereby causing the illuminant 40 to emit light toward the periphery of the compass body 20.
Claims
1. A magnetic compass comprising:
- a base having a hollow base body and a top cover covering said hollow base body, said hollow base body having a receiving chamber, a top opening in a top side of said receiving chamber, a battery chamber, a battery insertion opening in a top side of said battery chamber, and an illuminant chamber in communication between said receiving chamber and said battery chamber, said top cover closing said top opening of said hollow base body, said top cover having a view window corresponding to said receiving chamber and a through hole corresponding to said battery chamber;
- a compass body situated within said receiving chamber of said hollow base body of said base, said compass body having a housing, a magnetic needle pivotally mounted within said housing, and an indication card mounted in said housing;
- a battery set mounted within said battery chamber, said battery set having a first terminal thereof aimed at said battery insertion opening and a second terminal;
- an illuminant situated within said illuminant chamber and aimed at a periphery of said compass body, said illuminant having a first terminal suspended in said battery insertion opening and a second terminal;
- a push button supported on the first terminal of said illuminant above said battery chamber and partially inserted through the through hole of said top cover to the outside of said base for pressing by the user to force the first terminal of said illuminant downwards into contact with the first terminal of said battery set; and
- a top lid pivotally connected with one end thereof to said base by a pivot for covering said base, said top lid having a biconvex lens mounted therein;
- wherein said hollow base body further comprises a locating chamber disposed at one side of and in communication with said battery chamber; said magnetic compass further comprises an electrically conductive member for connecting one terminal of said battery set to the second terminal of said illuminant, said conductive member having a base frame mounted in said locating chamber, and a contact portion extended from said base frame and inserted into said battery chamber and pressed on the second terminal of said battery set; the second terminal of said illuminant is electrically connected to said base frame of said conductive member.
2. The magnetic compass as claimed in claim 1, wherein said conductive member further comprises two protruding strips respectively upwardly extended from two opposite lateral sides of said base frame and respectively stopped against one side of said locating chamber at one side to force said base frame against an opposite side of said locating chamber.
3. The magnetic compass as claimed in claim 1, wherein said conductive member further comprises a locating strip outwardly extended from a top side of said flat rectangular base frame and curved backwards to hold down the second terminal of said illuminant on said flat rectangular base frame.
4. The magnetic compass as claimed in claim 1, wherein said contact portion of said conductive member is upwardly outwardly extended from a bottom of said base frame and smoothly arched.
Type: Application
Filed: Jun 8, 2004
Publication Date: Dec 8, 2005
Inventor: Gin-Sung Chang (Taichung Hsien)
Application Number: 10/862,571