Patent Application
20080078856
This invention will be better understood by referring to the accompanying drawings, wherein:
A preferred embodiment of an adhesive-tape roll base for an adhesive-tape holder in the present invention, as shown in
The adhesive-tape holder 20 assembled on the base 10 has the topside of its front wall plate disposed with a saw blade 21 and its upper portion bored with an adhesive-tape accommodating cavity 22 at a preset location.
The adhesive-tape roll base 30 is positioned at a preset location of the adhesive-tape holder 20 at the upper side of the adhesive-tape accommodating cavity 22. The adhesive-tape accommodating groove 22 of the adhesive-tape holder 20 has one upper side wall bored with a shaft hole 31 being larger than a semicircle and having an open topside, and the shaft hole 31 has a position-limiting block 311 formed on a preset location of its bottom. The adhesive-tape accommodating groove 22 of the adhesive-tape holder 20 has the other upper sidewall bored with a shaft groove 32 with an arc-shaped bottom and an upward opening. The adhesive-tape roll base 30 also consists of a positioning shaft 33 whose length is approximately equivalent to the distance between the shaft hole 31 and the shaft groove 32. The positioning shaft 33 has a first end, opposite to the shaft groove 32, formed with a thin and flat holding member 331, and one circumferential side bored with an axial through guiding groove 332. The positioning shaft 33 is further bored with an axial position-limiting groove 334 at one side of the first end the guiding groove 332 with an open end abutting to the holding member 331 and a closed end. The position-limiting groove 334 is exactly able to restrict and secure the position-limiting block 311 therein. Thus, the positioning shaft 33 can be inserted through the shaft hole 31 and secured on the adhesive-tape holder 20 with the guiding groove 332 moved forward along the position-limiting block 311. After positioned, the positioning shaft 33 has one end secured in the shaft groove 32 and the other end fixed in the shaft hole 31. Afterward, the positioning shaft 33 can be turned clockwise by means of its holding portion 331 to make the position-limiting block 311 engaged in the position-limiting groove 334 to push against the closed end of the position-limiting groove 334. After the positioning shaft 33 is secured in position, the topside 335 of the holding member 31 of the positioning shaft 33 is flush with the upper edges of the opposite side walls of the adhesive-tape holder 20.
In using, as shown in
Specifically, the adhesive-tape roll base for an adhesive-tape holder in the present invention is provided with a positioning shaft to be inserted through the shaft hole and having its opposite ends respectively secured in the shaft groove and in the shaft hole. In addition, the positioning shaft can be firmly secured on the adhesive-tape holder by mutual engagement of the position-limiting groove at one end of the positioning shaft and the position-limiting block at the bottom of the shaft hole. By so designing, an adhesive-tape roll can be firmly positioned in the adhesive-tape accommodating cavity of the adhesive-tape holder not to fall off even in case of applying force improperly.
While the preferred embodiment of the invention has been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention.
