GB2246980A

GB2246980A - Motor-driven eraser

Info

Publication number: GB2246980A
Application number: GB9018042A
Authority: GB
Inventors: Chin-Fu Chung
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-08-16
Filing date: 1990-08-16
Publication date: 1992-02-19
Also published as: GB9018042D0; FR2668737A3

Abstract

A battery-operated eraser for erasing ink or pencil marks, comprises a rubber stick (700) which is driven to rotate by means of a motor (6) and adjusted to protrude therebeyond by means of an adjusting device, and a dust collector for collecting the rubber chips and dust by means of suction effect. The adjusting device includes a slider (21) in the form of an L-shaped rod which can engage the rear of the stick (700) when the motor is stopped. Forward movement of the slider causes incremental forward movement of the stick holder (75) within rotary sleeve (70). The dust collector includes a cylindrical wire gauze (42, Fig. 1) housing a centrifugal suction pump (5), dust being drawn into the collector through opening (202) in the eraser body. The eraser can be modified (Fig. 8) to function as a nasal aspirator. <IMAGE>

Description

4UTG! IC ERASE The present invention relatesto erasers and more particularly to a battery-operated automatic eraser for erasing ink or pencil marks.

In writing, a rubber eraser may be used to erase the ink or pencil marks for correction. The use of a rubber eraser commonly produce rubber chips and dust which may be dispersed in the air to pollute the air. The collection of the rubber chips and dust is indeed a matter of concern. It is a generally object of the present invention to solve the said problem.

An object of the present invention is to provide an automatic eraser which can automatically erase ink or pencil marks as well as suck up rubber chips.

Another object of the present invention is to provide an automatic eraser which is impact and easy to operate.

Still another object of the present invention is to provide an automatic eraser which has a dust collector for collecting rubber chips and dust.

Still another object of the present invention is to provide an automatic eraser which is easy to detach and assemble.

Still another object of the present invention is to provide an automatic eraser which is inexpensive to manufacture.

Still another object of the present invention is to provide an automatic eraser which comprises a slider to adjust the range of rubber stick which protrudes therebeyond for erasing ink or pencil marks.

A yet further object of the present invention is to provide an automatic eraser which can be attached with a nasal aspirator for sucking nasal discharge.

An embodiment of the present invention will now be described by uay of example with reference to the accompanying drawings in which: Fig. 1 is a perspective exploded view of an automatic eraser in accordance with the present invention; Fig. 2 is a sectional elevation of the automatic eraser of Fig. 1; Fig. 3 is a perspective vieu of the automatic erasef of Fig. 1; Fig. 4 illustrates the operation of the present invention to erase ink from a paper; Fig. 5 illustrates the operation of the present invention to suck up rubber chips; Figs. 6 and 7 illustrate the operation of the present invention to adjust the rubber stick; and Fig. 8 is an alternate form of the present inven ion.

Referring to the various drawings attached herewith, a detailed description of the structural features of "automatic eraser" of the present invention is as follows:- Turning now to the annexed drawings in greater derail and referring first :e Figs. 1 and 2, therein illustrated is an automatic eraser in accordance with the present invention and generally comprised of a front conical socket 1, an intermediate socket 2, a cylindrical housing 3, a dust collector 4, a centrifugal type suction pump 5, a motor 6, a back cap 7, a rotary sleeve 70 and a rubber stick 700.

The front conical socket 1 has a boring bore 10 for the penetration therethrough of the rubber stick 700, an inner thread and a notch 11 to match with the intermediate socket 2 for connection. The intermediate socket 2 comprises a suction hole 202 on its bottom side, a connecting end 20 projecting from its front end, which connecting end 20 comprises an outer thread 200 for the connection with the inner thread of the front socket 1 and defines therein a hole 20' through its central axis for the penetration therethrough of the rotary sleeve 70 and the rubber stick 700 to connect to the motor shaft 60 of the motor 6, and a slider 21 to slide thereon.The rotary sleeve 70 comprises two opposite elongated notches 71 and 72 piercing therethrough longitudinally, a plurality of holes 76 arranged longitudinally in a line, and a division wall 74 in its boring bore 73 to divide with its boring bore 73 a space for the sliding therein of the stick holder 75. The rubber stick 700 is retained by a stick holder 75 and set in the boring bore 73 of the rotary sleeve 70. The stick holder 75 comprises elongated notches 750 piercing therethrough and a raised portion 751. When the stick holder 75 is inserted in the boring bore 7 of the rotary sleeve 70, the raised portion 751 ca be controlled by the slider 21 to alternatively set in either one of the holes 76 of the rotary sleeve 70 so as to adjust the position of the connected rubber stick 700.

The slider 21 comprises a L-shaped rod 210 having a spring 211 mounted thereon, which spring 211 constantly pushes the slider 21 to separate from the rotary sleeve 70. The dust collector 4 and the suction pump 5 are respectively received in the intermediate socket 2 and secured to the motor shaft 60 of the motor 6. The dust collector 4 has substantially a cylindrical body comprising a through-hole 4C through its central axis, a plurality of vertical rot portions 41 equidistantly disposed around its peripheral and a wire gauze portion 42 internally covering over the vertical rod portions 41. The centrifugal type suction pump 5 comprises a hollow shaft 51 defining therein a boring bore 50 for the insertion therein of the motor shaft 60 of the motor 6 so that it can be fixedly connected to the motor 6 by means of screw or the like to follow the motor 6 to rotate.The cylindrical housing 3 comprises a front neck 300 having thereon an outer thread 301 for the connection thereto of the intermediate socket 2 through screw-joint, a through-hole 30 on its front end through its central axis, an inner space for the setting therein of the motor 6 and the battery 8, a button switch 31 on its outer wall to electrically control the connection of the battery with the motor 6, and an externally threaded rear neck 32 for the connection thereto of the back cap 7. The back cap 7 comprises therein a conducting plate 701 to conduct electricity from the battery 8 to the motor 6 by means of the operation of the button switch 31, a recess hole 702 on its back side for the fastenIng therein of a rubber block 703.

With reference to Figs. 4 and 5, after the battery is set in the cylindrical housing 3 and the back cap 7 is tightly screwed up with the cylindrical housing 3, the button switch 31 can be pressed on to turn on the motor 6 to drive the motor shaft 60 to rotate. The rotation of the motor shaft 60 simultaneously drives the centrifugal type suction pump 5 and the connected rotary sleeve to rotate so as to further carry the rubber stick 700 to rotate. Therefore, the rubber stick 700 can be pressed on a paper to erase ink or pencil marks automatically. Each time after erasing, the suction hole 202 of the intermediate socket 2 can be aimed at the erasing area to suck up rubber chips into the dust collector 4 by means of the operation of the centrifugal type suction pump 5.The intermediate socket 2 can be turned to separate from the cylindrical housing 3 so that the dust collector 4 can be removed for cleaning.

With reference to Figs. 6 and 7, when the protruding end of the rubber stick 700 beyond the front socket 1 is too short to erase conveniently, the rubber stick 700 can be moved forward by means of the control of the slider 21. As soon as the button switch 31 is turned off, the slider 21 is pressed down permitting its L-shaped rod 210 to insert in the boring bore 73 of the rotary sleeve 70 to stop against the rear end of the rubber stick 700 and the stick holder 75. The slider 21 is then driven to push the stick holder 75 to carry the rubber stick 700 to move forward. Hhen the stick holder 75 and the rubber stick 700 are carried to move forward, they can be firmly positioned in the boring bore 73 of the rotary sleeve 70 at a desired position by means of setting the raised portion 751 of the stick holder 75 in either one of the holes 76 of the rotary sleeve 70.

With reference to Fig. 8, the front socket 1 and the intermediate socket 2 may be removed from the cylindrical housing 3, and a nasal aspirator 90 can be secured to outer thread 301 of the front neck 300 of the cylindrical housing 3 by means of its inner thread 91. The nasal aspirator 90 comprises an elongated hollow front end 9 having a flexible tube 92 extending therefrom for inserting in one's nose to suck one's nasal discharge.

Claims

CLAIMS:

1. An automatic eraser, including: a cylindrical housing comprising a front neck having thereon an outer thread, a through-hole on its front end through its central axis, a button switch on its outer wall, and an externally threaded rear neck; an intermediate socket comprising an inner thread screwed up with the outer thread of the front neck of said cylindrical housing, a suction hole on its bottom side, a connecting end projecting from its front end and having an an outer thread thereon, a hole through its central axis, and a slider to slide thereon; a front conical socket having an inner thread screwed up with the outer thread of the connecting end of said intermediate socket, and a boring bore through its central axis;; a cylindrical dust collector received in said intermediate socket, and having a through-hole through its central axis and a circular upstanding wall portion formed of wire gauze for collecting dust; a centrifugal type suction pump having a front hollow shaft inserted and being received in said cylindrical dust collector; a motor received in said cylindrical housing having a motor shaft inserted in the front hollow shaft of said centrifugal type suction pump and fixedly secured thereto; a battery received in said cylindrical housing and having its one end connected to said motor; a back cover having an inner thread screwed up with the outer thread of the rear neck of said cylindrical housing, a conducting plate pressed to contact said battery at its other end opposite to said motor;; a rotary sleeve received in said intermediate socket and fixedly connected to the motor shaft of said motor; a stick holder for holding a rubber stick and being fastened into said rotary sleeve; wherein said motor is turned to operate through the operation of said button switch to drive said rubber stick to rotate, via said rotary sleeve and said stick holder, for erasing ink or pencil marks, and simultaneously drive said centrifugal type suction pump to such up dust into said dust collector through said suction hole; and wherein said slider can be pushed to drive said stick holder to move forward so that the rubber stick in said stick holder can protrude beyond said front socket for use.

2. An automatic eraser as claimed in claim 1, wherein said slider comprises a L-shaped rod having a spring mounted thereon to constantly push said slider away from said stick holder.

3. An automatic eraser as claimed in clain 1, wherein said front socket and said intermediate socket can be removed from said cylindrical-housing and a nasal aspirator or any suction device can be secured to the front neck of said cylindrical housing through screw-joint for other functional operation.

4. An automatic eraser substantially as hereinbefore described with reference to, and as illustrated in Figs 1 to 7; or Fig 8 of the accompanying drawings.