Spring energized desktop stapler
First Claim
1. A stapling device, comprising:
- a body and a handle pivotably attached to the body wherein the handle has a rest position where the handle is pivoted to a farthest position away from the body, the handle has a pre-release position where the handle is pivoted toward the body, and the handle has a re-set position intermediate between the rest position and the pre-release positions;
a striker is movable within the body and is linked to a front end of a lever at a centrally disposed striker slot, and a rear end of the lever is linked to the handle wherein pressing the handle toward the body causes the striker to rise in the body;
a power spring within the body is linked to the striker at a front end of the power spring whereby raising the striker causes the power spring to deflect and store energy;
at a predetermined position of the handle the lever suddenly de-links from the striker and the striker ejects a staple out of a staple loading chamber as the power spring returns to a rest position;
wherein the power spring includes two co-axial helical coils that pivot about a spring axis, with the coils spaced apart from each other, and the lever passes between the coils;
wherein the lever includes a lever pivot axis with an elongated slot wherein the pivot axis is pivotably and slidably mounted to the body, the front of the lever being in front of the helical coils, the rear of the lever being behind the helical coils, and the lever being nested between the two helical coils;
wherein the helical coils of the power spring terminate in two parallel, forward extending arms including a spring end of each arm, the spring ends extend into openings in the striker, the openings being to each side and below the striker slot; and
wherein the spring arms are spaced apart, and an impact force from the arms of the power spring against a bumper stop is directed toward outer portions the body, and the bumper is supported by a ceiling of the staple loading chamber.
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Accused Products
Abstract
A desktop stapler uses a spring to store energy to install staples by impact blow. The force required to fasten papers together is reduced. A very compact mechanism is used, including a dual coil power spring with a nested lever. A multi-function base provides a sloped front all the way to down to a desk top surface to guide paper sheets atop the base, easy access for lifting the stapler off a desk, horizontal or vertical resting positions, and integrated soft grip under-surface. The base surrounds the rear of the stapler body to provide a smooth exterior so that the device is natural to use both horizontally and vertically. A simple re-set spring provides a smooth re-set action as the handle is raised. A staple track includes enlargement features to fit a larger staple pusher spring.
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Citations
22 Claims
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1. A stapling device, comprising:
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a body and a handle pivotably attached to the body wherein the handle has a rest position where the handle is pivoted to a farthest position away from the body, the handle has a pre-release position where the handle is pivoted toward the body, and the handle has a re-set position intermediate between the rest position and the pre-release positions;
a striker is movable within the body and is linked to a front end of a lever at a centrally disposed striker slot, and a rear end of the lever is linked to the handle wherein pressing the handle toward the body causes the striker to rise in the body;
a power spring within the body is linked to the striker at a front end of the power spring whereby raising the striker causes the power spring to deflect and store energy;
at a predetermined position of the handle the lever suddenly de-links from the striker and the striker ejects a staple out of a staple loading chamber as the power spring returns to a rest position;
wherein the power spring includes two co-axial helical coils that pivot about a spring axis, with the coils spaced apart from each other, and the lever passes between the coils;
wherein the lever includes a lever pivot axis with an elongated slot wherein the pivot axis is pivotably and slidably mounted to the body, the front of the lever being in front of the helical coils, the rear of the lever being behind the helical coils, and the lever being nested between the two helical coils;
wherein the helical coils of the power spring terminate in two parallel, forward extending arms including a spring end of each arm, the spring ends extend into openings in the striker, the openings being to each side and below the striker slot; and
wherein the spring arms are spaced apart, and an impact force from the arms of the power spring against a bumper stop is directed toward outer portions the body, and the bumper is supported by a ceiling of the staple loading chamber. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A stapling device, comprising:
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a body and a handle pivotably attached to the body at a rear of the stapling device, wherein the handle has a rest position where the handle is pivoted to an upper position away from the body, the handle has a pre-release position where the handle is pivoted down toward the body, and the handle has a re-set position intermediate between the rest position and the pre-release positions;
a striker movable within the body and linked to the handle through a lever wherein pressing the handle toward the body causes the striker to rise in the body;
wherein the handle presses a lever tab at a contact point near a rear of the lever, and the lever pivots about a lever pivot axis within the body;
a power spring within the body is linked to the striker wherein raising the striker causes the power spring to deflect and store energy;
wherein at a predetermined position of the handle, the lever suddenly releases the striker and the striker ejects a staple out of a staple loading chamber as the power spring returns to a rest position;
a re-set spring pushes upward upon the lever at a rear portion of the lever behind the lever pivot axis, in the re-set position of the handle the re-set spring causes a downward bias upon a front portion of the lever at the lever pivot axis; and
wherein the re-set spring engages the lever at a position rearward of the lever axis, and the re-set spring engages the lever rearward of the contact point. - View Dependent Claims (8, 9)
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10. A stapling device, comprising:
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a body and a handle pivotably attached to the body;
a staple loading chamber;
a track within the loading chamber to hold and guide staples in the stapling device;
a staple pusher to urge staples on the track toward a front of the stapling device;
a striker to eject staples at a front of the loading chamber out of the stapling device wherein a ceiling provides an upper surface of the loading chamber, a channel extends into the ceiling of the loading chamber, and the ceiling includes thicker areas of the ceiling away from the channel. - View Dependent Claims (11, 12)
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13. A stapling device, comprising:
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a body and a handle pivotably attached to the body, wherein the handle has a rest position where the handle is pivoted to a farthest position away from the body, the handle has a pre-release position where the handle is pivoted toward the body, and the handle has a re-set position intermediate between the rest position and the pre-release positions;
a striker that is movable within the body and is linked to the handle through a lever whereby pressing the handle toward the body causes the striker to rise in the body;
a power spring within the body that is linked to the striker wherein raising the striker causes the power spring to deflect and store energy;
wherein at a predetermined position of the handle, the lever suddenly de-links from the striker and the striker ejects a staple out of a staple loading chamber as the power spring returns to a rest position;
the power spring includes a helical coil that pivots about a spring axis; and
the lever axis is defined by a pin and the pin fits into a cavity of the body, and a molded cylindrical sleeve of the body surrounds the pin with the sleeve defining the spring axis, wherein a wire of the power spring slides against the sleeve as the spring is deflected. - View Dependent Claims (14)
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15. A stapling device, comprising:
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a body and a handle pivotably attached to the body, a staple loading chamber, a track within the loading chamber to hold and guide staples in the stapling device, a staple pusher to urge staples on the track toward a front of the stapling device, a striker to eject staples at a front of the loading chamber out of the stapling device, wherein a pusher spring is attached at one end to the track, and at a further end to the pusher, a diameter of the pusher spring fits within an internal area enclosed by the track and the pusher upon the track;
a tab extends into a channel of the loading chamber, a rib of the loading chamber is under the channel;
a bottom of the staple track is lowered at a downward protruding elongated crease whereby the track protrudes below a level of the tab to a level of the rib, the crease providing an enlarged internal area that fits a diameter of the pusher spring. - View Dependent Claims (16, 17)
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18. A stapling device for dispensing staples, comprising:
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a handle pivotably attached to a housing body;
a striker slidably disposed in the body proximate to a front end thereof;
a track disposed beneath the striker within the body for holding the staples, wherein the striker is biased to move toward the track to impact the staples;
a lever having a front end, a back end, a pivot axis therebetween, wherein the pivot axis pivotably engages the body, the handle selectively engages the lever, and the lever front end selectively lifts the striker against the striker bias;
a re-set spring includes a coiled torsion spring including a first arm and a second arm, the re-set spring urging the lever back end away from the track and lowering the lever front end to re-engage the striker;
wherein the re-set spring pivotably engages the body at a first end of the first arm, and the re-set spring presses the lever at a second end of the second arm; and
the re-set spring second end includes a single angled segment at a distal end of the second arm, the angled segment extends in a direction transverse to a length of the second arm, the angled segment extending from a first side of the lever to a second side of the lever, the angled segment being spaced from the first end of the re-set spring at the first side of the lever, the angled segment is further spaced from the first end of the re-set spring at the second side of the lever, and the second arm is drawn toward the first side of the lever as the angled segment presses the lever. - View Dependent Claims (19, 20, 21)
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22. A stapling device for dispensing staples, comprising:
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a handle pivotably attached to a housing body;
a striker slidably disposed in the body proximate to a front end thereof;
a track disposed beneath the striker within the body for holding the staples, wherein the striker is biased to move toward the track to impact the staples;
a lever having a front end, a back end, a pivot axis therebetween, wherein the pivot axis pivotably engages the body, the handle selectively engages the lever, and the lever front end selectively lifts the striker against the striker bias;
a re-set spring including a coiled torsion spring having a first arm and a second arm, the re-set spring urging the lever back end away from the track and lowering the lever front end to re-engage the striker;
wherein the re-set spring pivotably engages the body at a first end of the first arm, and the re-set spring presses the lever at a second end of the second arm; and
the first arm includes a bent segment that extends into a hole of the body, the hole being larger in diameter than a wire diameter of the re-set spring and defining a pivot axis for the first spring arm, wherein the bent segment has at its distal end a further bent portion, and the bent portion presses into a wall of the hole.
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Specification