Coating implements with material supply – Solid material for rubbing contact or support therefor – Including means to advance material
Reexamination Certificate
2000-06-22
2001-04-03
Huson, Gregory L. (Department: 3751)
Coating implements with material supply
Solid material for rubbing contact or support therefor
Including means to advance material
C401S062000
Reexamination Certificate
active
06210058
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a side knock type mechanical pencil, particularly a side knock type mechanical pencil provided with a mechanism for the delivery of a rod-like article such as an eraser or the like.
2. Description of the Prior Art
Heretofore, various side knock type mechanical pencils have been proposed such as, for example, the one disclosed in U.S. Pat. No. 3,883,253 and illustrated in
FIG. 1
attached hereto. According to this prior art example, a knock lever
22
is mounted within a side hole
21
of a cylindrical shell
20
having a chuck mechanism, and a lead is pushed out by knocking the knock lever
22
with a finger tip of the use while grasping the vicinity of the knock lever. More particularly, upon operation of the knock lever
22
, an actuating portion
22
a
thereof comes into abutment with a slant portion
24
a
of a slider
24
provided in an inner tube set
23
, thereby causing the inner tube set
23
to move forward along the inner wall surface of the cylindrical cell
20
against a backward biasing force of a spring
25
, whereby a chuck
26
is opened to effect delivery of a lead.
In such convention mechanical pencil, however, a side knock mechanism is generally positioned in the grip portion. Therefore, in the case where a grip member formed of an elastic material such as rubber is formed in that portion, the diameter of the grip portion becomes large, so the diameter of a lead tank
27
is set to a size which permits one lead to pass therethrough, and a space for spare leads is formed in the rear portion. Recently, however, there has been proposed a mechanical pencil having in the rear portion thereof a mechanism for the delivery of a rod-like article such as an eraser or the like. In a side knock type mechanical pencil having such a mechanism incorporated therein, there is no space for spare leads in the rear portion thereof; besides, the diameter of the lead tank
27
is required to be made small, and thus it has been difficult to accommodate spare leads.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a side knock type mechanical pencil having a sufficient space in the rear portion thereof and capable of enlarging the inside diameter of a lead tank and that of a side member, which are limited in length, so as to permit a plurality of spare leads to be received therein and also capable of providing a grip member if necessary.
It is another object of the present invention to provide a side knock type mechanical pencil having a rear-end knock mechanism in addition to a side knock function in order to permit a lead to be pushed out easily in the initial continuous knocking though this is difficult in the side knock operation.
It is a further object of the present invention to provide a side knock type mechanical pencil wherein a slide member as a constituent of a side knock mechanism is formed as a one-piece member to reduce the number of components and cost and facilitate the assembling work.
According to the present invention, in order to achieve the above-mentioned objects, there is provided a side knock type mechanical pencil including a cylindrical shell having a ferrule; a lead tank disposed axially slidably within the cylindrical shell; a chuck disposed at a front end portion of the lead tank, with a chuck ring being loosely fitted on the chuck; a resilient member for urging the chuck backward; and a slide knock mechanism provided in the cylindrical shell, the slide knock mechanism comprising a slide knock member provided in the cylindrical shell and a slide member having a lead inserting through hole formed axially and also having a slant portion for abutment with the side knock member, the slide member being movable axially against the backward biasing force of the resilient member.
Further, according to the present invention, in order to achieve the above-mentioned objects, there is provided a side knock type mechanical pencil including a cylindrical shell having a ferrule; a slide member disposed axially slidably within the cylindrical shell; a chuck disposed at a front end portion of the slide member, with a chuck ring being loosely fitted on the chuck; a resilient member for urging the chuck backward; and a side knock mechanism provided in the cylindrical shell, the side knock mechanism comprising a side knock member provided in the cylindrical shell and the slide member, the slide member being movable axially against the backward biasing force of the resilient member and having a slant portion for abutment with the side knock member and also having a lead inserting through hole formed axially.
By depressing a knock lever as the side knock member, the slide member is moved forward against the backward bias of the resilient member through the slant portion as a knock surface of the slide member to open the chuck and push out a lead. Where required, a rod-like article such as an eraser or the like can be pushed out backward by rotating a rear cap. Further, when continuous knocking is required, the rear end of the mechanical pencil can be knocked, whereby a lead can be pushed out.
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Kageyama Hidehei
Mitsuya Yoshihide
Ueki Tomiji
deVore Peter
Huson Gregory L.
Kotobuki & Co. Ltd.
Rothwell Figg Ernst & Manbeck p.c.
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