Patent Application
20090314142
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1. Field of the Invention
The present invention relates generally to a screwdriver bit or drive bit, and more particularly to an innovative drive bit with identification functions.
2. Description of Related Art Including Information Disclosed Under 37 CFR 1.97 and 37 CFR 1.98
In a modern industrial society, a wide range of products can be fastened securely by screw bolts for application in the everyday life and at various work sites. Thus, screwdrivers are frequently used.
Owing to different dimensions of various screw bolts, a plurality of drive bit sets, comprising drive bits that can be flexibly inserted into the handle of the same screwdriver, is developed for operators.
Since multiple drive bit sets can be accommodated in any particular tool bit, identification of metric or English unit, or different dimensions is difficult. For this reason, a bit set with an identification mechanism has been developed. As for the typical structure of a drive bit, a colored ring portion is shaped at the neck of the drive bit by a coating pigment or a sleeved glue ring for identification purposes. However, it is found from actual application that, when this tool with coated pigment is held manually by the operator, the shedding and fading of the pigment may occur, leading to failure of identification. As for the tool with the sleeved glue ring, the glue is easily hardened and scratched, leading to shedding without identification functions.
Moreover, when the typical identification mechanism of the drive bit is used, a better identification effect may be achieved if the drive bit is view laterally. The identification mechanism is generally embedded into the neck of the bit, so this positioning makes identification difficult, when viewed from the end of the bit. As the drive bit set is often inserted vertically into the tool kit, the typical identification mechanism presents a poor identification effect for the operator.
Thus, to overcome the aforementioned problems of the prior art, it would be an advancement in the art to provide an improved structure that can significantly improve efficacy.
Therefore, the inventor has provided the present invention of practicability after deliberate design and evaluation based on years of experience in the production, development and design of related products.
There is enhanced efficacy of the present invention.
The drive bit of the present invention yields and identification effect through an anodized protective film formed on the surface of an aluminum alloy identification ring. The solid aluminum alloy resists deformation, and the protective film presents a bright color and corrosion-resistant property, allowing identification mechanism and preventing discoloration. The present invention provides a durable identification effect.
The outer ring surface of the aluminum alloy identification ring is protruded obviously from the neck portion of the bit body. The operator visualizes the identification easily from the end of the bit. The visualization angle is improved, substantially affecting the identification effect with improved applicability.
With the structural pattern of the aluminum alloy identification ring, it is possible to yield strong slip-resistance for the bit, allowing the operator to take or fetch the bit more easily and conveniently.
There are improvements brought about by this invention.
Based upon the structure of the present invention, an under-reaming portion is shaped on the trepan boring of the aluminum alloy identification ring close to its aperture. The aluminum alloy identification ring can be sleeved smoothly into the neck portion of the bit body. Moreover, when the aluminum alloy identification ring is tightly sleeved into the neck portion, the aluminum scraps generated will be pushed to one end and then collected in the interior space formed by the under-reaming portion, thus ensuring that the aluminum alloy identification ring is aesthetically pleasing.
Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.
The features and the advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.
The drive bit A comprises a bit body 10 with an insertion end 11, an actuating end 12 and a neck portion 13 between the insertion end 11 and actuating end 12.
An aluminum alloy identification ring 20 has a trepan boring 21 for assembly onto the neck portion 13 of the bit body 10. The aluminum alloy identification ring 20 also comprises an outer ring surface 22 protruding from the neck portion 13 of the bit body 10.
An anodized protective film 30 is formed on the surface of the aluminum alloy identification ring 20 as shown in
Referring to
Referring to
Referring to
An anti-slip flange 25 is shaped at the outer ring surface 22 of the aluminum alloy identification ring 20. The anti-slip flange 25 is available with several patterns. Referring to
The trepan boring 21 of the aluminum alloy identification ring 20 could be tightly coupled with, or adhesively adapted with the neck portion 13 of the bit body 10.
Additionally, the aluminum alloy identification ring 20 of the present invention enables slip resistance for bit A. As existing bit sets are generally inserted vertically into the tool kit, and there is only a very limited spacing among them, the operator has to hold manually and apply force onto the bit rod, leading possibly to slippage and difficulty in operation. The aluminum alloy identification ring 20 of the present invention is designed in a manner that the outer ring surface 22 is protruded from the neck portion 13 of the bit body 10. The aluminum alloy identification ring 20 is of a solid metal structure, so it is possible to generate satisfactory slip-resistance for bit A.
