Patent Application
20090098493
1. Field of the Invention
The invention relates to a child resistant gas lighter with a free wheel a diameter of which is a certain larger than a fixed wheel thereof and being able to both prevent child from using and lower a cost of manufacturing.
2. Description of the Prior Art
Flint gas lighters having child resistant mechanism have long been developed. One conventional such kind of lighter is disclosed in a Chinese utility model patent bearing a patent number of “ZL 200620055328.4” and published on Feb. 28, 2007. As shown in
A drawback of such lighter is that its structure is complex and a cost of manufacturing thus becomes high.
The main object of the invention is to provide a child resistant flint gas lighter with a free wheel a diameter of which is a certain larger than a fixed wheel thereof and being able to both prevent child from using and lower a cost of manufacturing.
In order to accomplish the above object, the present invention provides a child resistant flint lighter having a body on which a pair of brackets are formed, a pivotal means being of bar-shaped and installed on the pair of brackets, a free wheel rotatably installed on the pivotal means, a flint wheel covering on the pivotal means, a fixed wheel covering on the pivotal means and fixed with respect to the flint wheel, a flint with respect of which the flint wheel and fixed wheel is able to rotate, and a flint spring pressing the flint on the flint wheel.
These and other objectives, features, and advantages of the present invention will become apparent from the following detailed description, the accompanying drawings, and the appended claims.
With reference to
Generally, a radius of the free wheel 15 is of 0.1 to 1.0, and preferably 0.5, millimeter greater than a radius of the fixed wheel 13. A thickness of the free wheel 15 is 0.8 to 1.2, and preferably 1.0 millimeter. The flint wheel 14 and the fixed wheel 13 are able to be either loose- or close-fitted to the pivotal means 12. In the loose fit, the pivotal means 12 is able to either fixed or rotatable with respect to the brackets 11, 11′, and in the close fit, the pivotal means 12 must be able to rotatable with the brackets 11, 11′.
In use, an adult human is able to hold the lighter with his hand and rotate the free wheel 15, the flint wheel 14 and the fixed wheel 13 together to spark the flint 16 with his thumb. Generally, there will be enough skin of his thumb that contacts the flint wheel and he is able to spark and ignite the lighter. However, when a user is a child, whose thumb is smaller than the adult user, there is not so much skin contacting the flint wheel 14 so when his thumb moves, only the free wheel 15 rotates and he is not able to spark and ignite the lighter.
It could be seen from above description, there is only one bar-shaped pivotal means needed in stead of the complex shafts in the conventional lighter. It will significantly reduce the complexity and time, thus cost, of manufacturing and assembling the pivotal means to the lighter.
One skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limiting.
It will thus be seen that the objects of the present invention have been fully and effectively accomplished. Its embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.
