GB2418637A

GB2418637A - Staple extractor

Info

Publication number: GB2418637A
Application number: GB0421786A
Authority: GB
Inventors: Walter Hsu
Original assignee: Welters Co Ltd
Current assignee: Welters Co Ltd
Priority date: 2004-09-30
Filing date: 2004-09-30
Publication date: 2006-04-05
Also published as: GB0421786D0

Abstract

A staple extractor for removing staples 20 from paper 30 comprises a movable hollow casing 40 pivotally mounted to a guide pressing board 50 having a protruding push block 53 which cooperates with a flat puller element 71 protruding from an engaging piece 70 attached to the casing 40. A spring element 60 is preferably attached at its ends to the guide pressing board 50 and the inner surface of the casing 40. In use, the flat puller element 71 is inserted under a staple to be removed 20, and pressing down of the casing 40 so that it pivots around rods 51 causes the engaging piece 70 to be lifted up, thereby clamping the staple 20 between the flat puller 71 and the push block 53 to pull the staple out, as shown in figure 5.

Description

24 1 8637

IMPROVED STAPLE EXTRACTOR STRUCTURE

The present invention is related to an improved staple extractor structure, including a movable member having an engaging cavity concaved upwards at the underside therein, and a U-shaped coupling recess disposed at the front bottom side thereof for retaining an engaging piece with a flat puller fixedly attached thereto. At preset positions on the inner wall of the engaging cavity thereof is symmetrically disposed a pair of pivoting holes to be mutually registered with pivoting rods of a guide pressing board having a protrusive push block extending at the front side thereof in match to the flat puller of the engaging piece thereof. A spring element is respectively attached at the inner wall of the engaging cavity and the upper surface of the guide pressing board by both ends thereof, permitting the rear side of the movable member to be elastically supported upwards thereby. Thus, via the design of the movable member and the guide pressing board, the staple extractor of the present invention can be directly and levelly placed on top of paper to remove staples pinned thereon in an easy and convenient manner to achieve the best using condition thereof.

Please refer to Figs. 1 to 2 inclusive. A conventional staple extractor 10 is made up of upper and lower handles 11, 12 mutually registered in crisscross manner and elastically supported via a spring (without shown in the diagram). At the front end of the upper and lower handles 11, 12 is respectively equipped with a flat puller 13 having a triangular through hole 131 disposed thereon and a flat push section 121. In practical use, the upper and lower handles 11, 12 must be held by a hand before the flat puller 13 attached at the upper handle 12 thereof is pushed to locate at a staple 20 and paper 30 there-between. Then, the upper and lower handles 11, 12 are mutually clamped together, permitting the flat puller 13 to bring upwards the staple 20 till the push section 121 thereof is abutted against the staple 20 as shown in Fig. 2. When the upper and lower handles 11, 12 keep clamping together, the push section 121 thereof will press at the staple 20 towards the through hole 131 thereof to generate a corresponding clamping force relative to that of the flat puller 13 so as to draw upwards the staple 20 out of the paper 30 thereof.

S There are some drawbacks to the conventional staple extractor above. Most of all, the staple extractor 10 cannot be located levelly onto the paper 30, and the upper and lower handles 11, 12 thereof must be securely held by hands in advance before mutually clamped together to remove the staple 20 thereby. Thus, the conventional staple extractor thereof is rather inconvenient and slow in practical use.

lO It is, therefore, the primary purpose of the present invention at least in preferred embodiments to provide an improved staple extractor structure, including a movable member, a guide pressing board, a spring element, and an engaging piece wherein, via the design of the movable member and the guide pressing board, the staple extractor of the present invention can be directly and levelly placed on top of paper to remove staples pinned on the paper without hands holding on thereto, facilitating an easier and convenient application and achieving the best using condition of the present invention.

Viewed from a first aspect, the present invention provides a staple extractor including a moveable member made up of an engaging cavity concaved upwards at the underside therein, an upwardly-inclined engaging edge formed at one side of the opening of the engaging cavity, a coupling recess extending at the front bottom side thereon, and a limiting groove indented upwards at the front side of the coupling recess thereof; at preset positions on the inner wall of the engaging cavity thereof is symmetrically disposed a pair of pivot holes to be mutually registered with pivot rods of a guide pressing board for locating the guide pressing board in the engaging cavity; a spring element is respectively attached at the inner wall of the engaging cavity and the upper surface of the guide pressing board by both ends thereof, permitting the rear side of the movable member to be elastically supported upwards by the spring element thereof; the guide pressing board having a flat abutting area extending at one bottom side thereon levelly aligned with an abutment facet of the engaging cavity thereof to define a movement space with the adjacent engaging edge thereof; the guide pressing board also includes a protrusive push block disposed at the front side thereof to be precisely located at the limiting groove of the movable member therein and extending outwards there-from; an engaging piece having a flat puller attached thereto is securely fixed to the coupling recess of the movable member and combined therewith into one unit; the movable member and the guide pressing board allowing the staple extractor, in use, to be directly and levelly placed on top of paper and the movable member to be pushed downwardly to remove a staple.

Viewed from a further aspect, the present invention relates to a staple extractor for extracting a staple from at least one sheet of paper, the staple extractor comprising a casing and a pivotably mounted member, a first element for insertion under the staple being provided at the front of the casing, and a second element, cooperable with said first element, being provided at the front of the pivotably mounted member, the pivotably mounted member being mounted in a cavity formed in the casing; wherein an underside of the casing is configured to allow said first element to be inserted under the staple and the casing to be pivoted relative to the pivotably mounted member to displace the first element away from said at least one sheet of paper at least partially to extract the staple; the pivotably mounted member, in use, remaining in contact with said at least one sheet of paper whilst said casing is pivoted to limit the movement of said second element.

The casing is preferably shaped so as to conform to the palm of a user's hand. A rear portion of the pivotably mounted member is preferably received in the cavity in the casing when the casing is pivoted relative to the pivotably mounted member.

The configuration of the underside of the casing may be determined by an edge and/or continuous surface. The underside of the casing may be convex in a longitudinal direction to facilitate the desired pivoting action. Preferably, however, a front portion of the underside of the casing is substantially co-planar with the first element and the rear portion of the underside is inclined upwardly. In this arrangement, the front and rear portions are preferably planar.

The first and second elements are preferably biased apart. The pivotably mounted member is preferably biased to a position whereby the underside of a rear portion thereof is co-planar with the underside of a front portion of the casing. Preferably, a spring is provided to bias the rear portion of the pivotably mounted member to said position.

The casing may be integrally formed. Preferably, the casing comprises a hollow member inside of which the pivotably mounted member is mounted. The casing preferably further comprises a guide member which is attached to the hollow member.

The irst element is preferably provided on said guide member.

Viewed from a still further aspect, the present invention provides an improved staple extractor structure, including a movable member having an upwardly-tilting engaging edge properly cut at one side of an engaging cavity concaved upwards at the underside therein, and a U-shaped coupling recess disposed at the front bottom side thereof for retaining an engaging piece with a flat puller fixedly attached thereto. Preferably, a central limiting groove is properly indented upwards at the front side of the coupling recess thereof, and at preset positions on the inner wall of the engaging cavity thereof is symmetrically disposed a pair of pivoting holes to be mutually registered with pivoting rods of a guide pressing board, permitting a push block of the guide pressing board to be precisely located at the limiting groove therein and protruding outwards there-from in match to the flat puller thereof. Preferably, a spring element is respectively attached at the inner wall of the engaging cavity and the upper surface of the guide pressing board by both ends thereof, permitting the rear side of the movable member to be elastically supported upwards thereby. Besides, the guide pressing board preferably has a flat abutting area extending at one bottom side thereon levelly aligned with an abutment facet of the engaging cavity thereof to define a movement space with the adjacent engaging edge thereof. Thus, the staple extractor of the present invention may be directly and levelly placed on top of paper to remove staples pinned thereon in an easy and convenient manner, achieving the best using condition thereof.

Viewed from a yet still further aspect, the present invention provides an improved staple extractor structure, including a movable member made up of an engaging cavity concaved upwards at the underside therein, an upwardly-tilting engaging edge properly cut at one side of the opening of the engaging cavity thereof, a coupling recess extending at the front bottom side thereon, and a central limiting groove properly indented upwards at the front side of the coupling recess thereof; at preset positions on the inner wall of the engaging cavity thereof is symmetrically disposed a pair of pivoting holes to be mutually registered with pivoting rods of a guide pressing board for locating the guide pressing board thereof at the engaging cavity therein; a spring element is respectively attached at the inner wall of the engaging cavity and the upper surface of the guide pressing board by both ends thereof, permitting the rear side of the movable member to be elastically supported upwards by the spring element thereof; besides, the guide pressing board has a flat abutting area extending at one bottom side thereon levelly aligned with an abutment facet of the engaging cavity thereof to define a movement space with the adjacent engaging edge thereof; the guide pressing board also includes a protrusive push block disposed at the front side thereof to be precisely located at the limiting groove of the movable member therein and extending outwards there-from; an engaging piece having a flat puller attached thereto is securely fixed to the coupling recess of the movable member and integrally combined therewith into one unit; thus, via the design of the movable member and the guide pressing board thereof, the staple extractor of the present invention can be directly and levelly placed on top of paper and stably located thereon without hands holding on thereto when the movable member is pushed downwards to remove a staple pined thereon, facilitating an easier and more convenient application and achieving the best using condition thereof.

A preferred embodiment of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which: Fig. 1 is a diagram showing a conventional staple extractor in practical use.

Fig. 2is a diagram showing the conventional staple extractor applied to remove a staple in practical use.

Fig. 3is a perspective exploded view of the present invention.

Fig. 4 is a diagram showing the operation of the present invention in assembly.

Fig. 5is a diagram showing the present invention applied to remove a staple from paper in practical use.

Please refer to Fig. 3. The present invention is related to an improved staple extractor structure, including a movable member 40 made up of an engaging cavity 41 concaved upwards at the underside therein, an upwardlytilting engaging edge 42 properly cut at one side of the opening of the engaging cavity 41 thereof, a U-shaped coupling recess 43 extending from edge to edge at the front bottom side thereon, and a central limiting groove 44 properly indented upwards at the front side of the coupling recess 43 thereof. At preset positions on the inner wall of the engaging cavity 41 thereof is symmetrically disposed a pair of pivoting holes 45 each communicating with a vertical guide track 46 extending downwards at the bottom side thereof. A guide pressing board is provided with a pair of symmetrical pivoting rods 51 to be led upwards via the vertical guide tracks 46 till precisely registered with the pivoting holes 45 for locating the guide pressing board 50 at the engaging cavity 41 therein. A spring element 60 is respectively attached at the inner wall of the engaging cavity 41 and the upper surface of the guide pressing board 50 by both ends thereof, permitting the rear side of the movable member 40 elastically supported upwards by the spring element 60 thereof. And the guide pressing board 50 is provided with a flat abutting area 52 extending at one lateral edge of the bottom side thereon and levelly aligned with an abutment facet 411 of the engaging cavity 41 thereof to define a movement space A with the adjacent engaging edge 42 thereof as shown in Fig. 4. The guide pressing board 50 also includes a protrusive push block 53 disposed at the front side thereof to be precisely located at the limiting groove 44 of the movable member 40 therein and extending outwards there-from. An engaging piece 70 is securely fixed to the coupling recess 43 of the movable member 40 and integrally combined therewith into one unit. A flat puller 71 with a triangular through hole 711 defined thereon is fixedly attached at one edge of the engaging piece 70 and correspondingly matched to the push block 53 of the guide pressing board 50 thereof.

The flat puller 71 is properly bent downwards to form a plane surface at the bottom thereon.

Please refer to Figs. 4 to 5 inclusive. In practical use, the staple extractor of the present invention is placed onto the upper surface of paper 30 with the flat abutting area 52 of the guide pressing board 50, the abutment facet 411 of the engaging cavity 41, and the engaging piece 70 thereof levelly located on top of the paper 30 thereof. The staple extractor is then moved towards a staple 20 pinned at the paper 30 thereon, and the flat puller 71 thereof is levelly guided and forced between the staple 20 and the paper 30 thereof, securely preventing the flat puller 71 from tearing off the paper 30 thereof. The movable member 40 is then pressed by the rear side thereof to descend downwards at the movement space A therein, actuating the pivoting holes 45 to rotate downwards along the pivoting rods 51 thereof and synchronically compress tight the spring element 60 therewith as shown in Fig. 5. When the engaging edge 42 of the engaging cavity 41 descending downwards at the movement space A therein completely touch and cover the upper surface of the paper 30 thereof, the abutting facet 411 along with the engaging piece 70 mounted at the coupling recess 43 therein will be pivotally bent upwards and ascend at the other side relative to the descending engaging edge 42 thereof. Meanwhile, the flat puller 71 can draw upwards the staple 20 accordingly till the middle section of the staple 20 is stopped by the push block 53 pressing the staple 20 towards the triangular through hole 711 to generate a clamping force relative to that of the flat puller 71 so as to draw out the stapler 20 from the paper 30 in an easy and smooth manner. Thus, via the design of the movable member 40 and the guide pressing board 50 thereof, the staple extractor thereof can be directly and levelly applied on top of the paper 30 and stably located stably thereon without hands holding on thereto when the movable member 40 is pushed downwards to remove the staple 20 pinned onto the paper 30, facilitating an easier and more convenient application to achieve the best using condition of the present invention thereof.

Claims

CLAIMS: 1. A staple extractor including a movable member made up of an

engaging cavity concaved upwards at the underside therein, an upwardly-inclined engaging edge formed at one side of the opening of the engaging cavity, a coupling recess extending at the front bottom side thereon, and a limiting groove indented upwards at the front side of the coupling recess thereof; at preset positions on the inner wall of the engaging cavity thereof is symmetrically disposed a pair of pivot holes to be mutually registered with pivot rods of a guide pressing board for locating the guide pressing board in the engaging cavity; a spring element is respectively attached at the inner wall of the engaging cavity and the upper surface of the guide pressing board by both ends thereof, permitting the rear side of the movable member to be elastically supported upwards by the spring element thereof; the guide pressing board having a flat abutting area extending at one bottom side thereon levelly aligned with an abutment facet of the engaging cavity thereof to define a movement space with the adjacent engaging edge thereof; the guide pressing board also includes a protrusive push block disposed at the front side thereof to be precisely located at the limiting groove of the movable member therein and extending outwards there-from; an engaging piece having a flat puller attached thereto is securely fixed to the coupling recess of the movable member and combined therewith into one unit; the movable member and the guide pressing board allowing the staple extractor, in use, to be directly and levelly placed on top of paper and the movable member to be pushed downwardly to remove a staple.
2. The staple extractor structure as claimed in Claim 1 wherein the flat puller securely fixed at the engaging piece thereof is bent downwards to form a plane surface at the bottom thereof.
3. The staple extractor structure as claimed in Claim I or Claim 2 wherein the movable member is also equipped with a pair of vertical guide tracks symmetrically communicating with and extending under the pivoting holes thereof.
4. The staple extractor structure as claimed in any one of Claims 1, 2 or 3 wherein the coupling recess of the movable member is extending from edge to edge at the front bottom side thereof and properly cut at preset positions into a U-shaped form.
5. A staple extractor for extracting a staple from at least one sheet of paper, the staple extractor comprising a casing and a pivotably mounted member, a first element for insertion under the staple being provided at the front of the casing, and a second element, cooperable with said first element, being provided at the front of the pivotably mounted member, the pivotably mounted member being mounted in a cavity formed in the casing; wherein an underside of the casing is configured to allow said first element to be inserted under the staple and the casing to be pivoted relative to the pivotably mounted member to displace the first element away from said at least one sheet of paper at least partially to extract the staple; the pivotably mounted member, in use, remaining in contact with said at least one sheet of paper whilst said casing is pivoted to limit the movement of said second element.