JP5582328B2 - Stapler with leg flattening means - Google Patents

Description

  The present invention relates to a stapler, and more particularly to a leg flattening means for bending both legs of a staple flatly.

  A conventional stapler includes a leg bending device that bends the leg of the staple. However, the conventional leg bending apparatus bends the staple legs, so that the thickness of the stapled document is thick. The curved legs cannot hold a thick document, easily deform, and easily injure people. Therefore, in order to solve the above problems, a stapler having a leg flattening means such as Taiwan Patent No. 1229026 or No. 112774637 has been proposed.

The 026 patent disclosed a leg flattening means with a V-shaped drive element. (See Patent Document 1). One end of the drive element is pivotally connected to the front end of the trigger lever, and drives the leg flattening means when the trigger lever is pressed. However, the drive element is connected to the front end of the trigger lever and requires a large force to operate the stapler. In addition, the structure of the conventional stapler is complicated and expensive to manufacture. Further, to refill staples in a conventional stapler, the trigger lever must be pivoted to a large angle to open the staple magazine, which makes the stapler easy to tip over.
Taiwan Patent No. 1229026

The 637 patent disclosed a stapler with a sliding element between the trigger lever and the leg flattening means. (See Patent Document 2). When the trigger lever is lowered, the sliding element is moved to actuate the leg flattening means to bend both legs of the released staple. However, the sliding element of the conventional staple has a complicated structure and is difficult to manufacture and assemble, and takes time. Therefore, the force acting on the trigger lever is not efficiently transmitted to the leg flattening means via the sliding element.
Taiwan Patent No. 112774637

  Taiwan Utility Model No. 299629 discloses another conventional stapler. This 629 utility model provides a labor saving effect by forming a drive in the lever system for connecting the trigger lever. However, the drive device of the 629 utility model also has a complicated structure and its production cost is high. In addition, the trigger lever must pivot to a large angle to open the staple magazine in order to refill the staples, and the stapler tends to tip over.

  To overcome this drawback, the present invention provides a stapler that alleviates or avoids the above problems.

  SUMMARY OF THE INVENTION A main object of the present invention is to provide a stapler with a labor-saving lever system and a stapler transmission system having a single fulcrum to bend both legs of a staple flat, simplifying the structure and providing a labor-saving performance. Is to provide.

  The stapler includes a support base, a magazine assembly, a trigger assembly, and leg flattening means. The support base has a front end and a rear end. The magazine assembly is pivotally connected to the rear end of the support base. The trigger assembly is pivotally connected to the support above the magazine assembly and includes a trigger lever and a pusher element. The trigger lever is pivotally attached to the rear end of the support base. The pusher element is pivotally attached to the trigger lever pivotally and has two pusher arms extending towards the support. The said leg part flattening means is attached to a support stand, and has a slide stand, a movement stand, and an anvil element. The slide base is slidably attached to the support base, has an extruded segment formed on the slide base, and is selectively pushed out by the push element by a push arm. The moving table is operably connected to the support table, selectively blocked by the slide table, and held so that the transfer table does not descend before the slide table slides against the support table. And an elongated hole formed. The anvil element is attached to an elongated hole of the moving table.

  Referring to FIGS. 1 and 2, the stapler according to the present invention includes a support base 10, a magazine assembly 20, a trigger assembly 30, leg flattening means 40, and a base holder 50.

The support base 10 has a front end, a rear end, and a bottom, and includes a bottom plate 11 and two side boards 12 formed on the bottom plate 11 and projecting upward from both side portions of the bottom plate 11. The bottom plate 11 is elongated and has a front end, a rear end, a pair of guide holes 111, and a mounting hole 112. The guide hole 111 and the attachment hole 112 are formed at the front end of the bottom plate 11.
Two pivot tabs 114 are formed in the center of the bottom plate 11 of the support base 10. The spring base 113 is formed in the center of the bottom plate 11 between the mounting hole 112 and the pivot tab 114.

  Each side board 12 has a main shaft hole 121 defined at the rear end of the support base 10 and aligned with each other, and a second pivot hole 122 aligned with each other. The main shaft 13 is attached to both side boards 12 through main shaft holes 121 in order to pivotally connect the magazine assembly 20 and the trigger assembly 30 to the support base 10. A curved limiting slot 123 is formed in each side board 12 near the second pivot hole 122 and is aligned with each other. Each side board 12 further forms a hook 124 at its front end.

  The magazine assembly 20 is pivotally connected to the rear end of the support base 10 by a main shaft 13, and includes a staple magazine 21, a magazine cap 23, and a limiting rod 22.

  The staple magazine 21 is pivotally connected to the rear end of the support base by a main shaft 13 and holds the staples inside. The magazine spring 14 is mounted between the bottom plate 11 of the support 10 and the bottom of the staple magazine 21. The staple magazine 21 includes a rear end, a shaft hole 211, and two rod holes 212. The shaft hole 211 is formed at the rear end of the staple magazine 21, and the main shaft 13 is attached via the shaft hole 211 so as to pivotally connect the staple magazine 21 to the support base 10. The rod hole 212 is formed at the center of the bottom of the staple magazine 21 and corresponds to the restriction slot 123 of the side plate 12 of the support base 10.

  The magazine cap 23 is connected to the support base 10 and the staple magazine 21 by the main shaft 13, has a top portion, and forms a hook 231 on the top portion of the magazine cap 23.

  The limiting rod 22 is attached to the staple magazine 21 via a rod hole 212 and has two ends that are each slidably held in a limiting slot 123 of the support 10.

  Still referring to FIG. 3, the trigger assembly 30 is pivotally connected to the rear end of the support base 10 at a position above the magazine assembly 20 by the main shaft 13, and includes a trigger lever 31, a pushing element 36, The pivot 35 and the auxiliary lever 34 are included.

  The trigger lever 31 is pivotally connected to the rear end of the support base 10 by the main shaft 13. The trigger lever 31 has a front end, a rear end, an intermediate portion, two shaft holes 311, and two shaft holes 312. The shaft holes 311 are formed at the rear end of the trigger lever 31 and are aligned with each other. The main shaft 13 is attached through a shaft hole 311 so as to pivotally connect the trigger lever 31 to the support base 10. The shaft holes 312 are formed at the top of the middle portion of the trigger lever 31 and are aligned with each other. The drive tab 32 is fixed to the front end of the trigger lever 31 and slidably engages with the magazine cap 23. The trigger spring 33 is attached between the trigger lever 31 and the magazine cap 23 and abuts against them.

  The push element 36 is U-shaped and is pivotally attached to the trigger lever 31 by a pivot 35 and has a top plate and two push arms 361. The top plate has two ends and an engagement tap 363 that engages the hook 231 with the magazine cap 23. The pushing arms 361 are curved and extend from both ends of the top plate toward the support base 10. Each push arm 361 has a shaft hole 362 aligned with each other.

  The pivot 35 is attached to the trigger lever 31 and the pusher arm 361 via shaft holes 312 and 362 for pivotally connecting to the pusher element 36 and the trigger lever 31. The pivot shaft 35 of the trigger assembly 30 and the push arm 361 of the push element 36 are arranged along the pivot route at the center of the main shaft 13.

  The auxiliary lever 34 is pivotally connected to the rear end of the support base 10 and has two side plates formed on the auxiliary lever 34 and extending downward from the top thereof. A pivot stub 341 is formed at the rear end of each side plate of the auxiliary lever 34, and the second of the corresponding one of the side plates 12 of the support base 10 is pivotally connected to the support base 10. The shaft hole 122 is rotatably attached.

  The auxiliary lever 34 has a rail on which a pivot 35 of the trigger assembly 30 is slidably attached. The rail of the auxiliary lever 34 includes two slots 342 respectively formed on both side plates thereof. Both ends of the pivot 35 of the trigger assembly 30 are slidably held in slots 342 on both side plates of the auxiliary lever 34, respectively.

  2, 5, and 6, the leg flattening means 40 is attached to the support base 10 and includes a slide base 41, a movable base 43, and an anvil element 45.

  The slide base 41 is slidably attached to the support base 10, and an extruded segment 36 is formed on the slide base 41. The extruded segment 36 corresponds to the push arm 361 of the push element 36, and is pushed by the push arm 361. Selectively extruded. The extruded segment of the slide base 41 is disposed along a pivot route, and the pivot shaft 35 of the trigger assembly 30 and the push arm 361 of the push element 36 are disposed along the pivot route. In the preferred embodiment, the extruded segment includes two extruded tabs 412 attached to both sides of the rear end of the slide 41.

  The slide base 41 is further formed with a plurality of engagement tabs 411 formed at the bottom of the slide base 41 and projecting therefrom, each of which is slidably engaged with the guide hole and the mounting hole 112 of the bottom plate 11 of the support base 10. It has an engagement tab 411.

  The slide base 41 further has a contact rib 415 formed at the front end thereof and an opening 414 formed in the slide base 41 in the vicinity of the front end.

  The pull-back spring 42 is attached between the support base and the slide base 41 so as to give a reaction force to the slide base. In the preferred embodiment, the slide base 41 has a spring accommodating hole 413 in the center for holding the pull-back spring 42 inside.

  The moving table 43 is preferably operatively connected to the support table 10 and is selectively blocked by the slide table 41 so that the moving table 43 does not move downward before the slide table 41 slides relative to the support table 10. The The moving table 43 has a front end, a rear end, and an elongated hole 431 formed in the front end. Two pivot stubs 432 are formed at the rear end of the movable table 43 and are pivotally connected to the pivot tabs 114 at the support so as to pivotally connect the movable table 43 to the support 10. ing.

  The moving table 43 further includes a contact flange 434 formed at the bottom at the front end of the moving table 43 and contacting the contact rib 415 with the slide table 41.

  In addition, the base spring (44) is held in the opening 414 of the slide base 41 and is attached between the mobile base 43 and the bottom plate of the support base 10 so as to apply a pulling force to the mobile base 43.

  The anvil element 45 is attached to the elongated hole 431 of the moving table 43, is supported by the support spring 46, and corresponds to the staple driving tab 32.

  With reference to FIGS. 1 and 2, the base holder 50 is attached to the support 10 and has a front end, a recess 51, two side walls 52, two hooking arms 53, and a sliding channel 54.

  The recess 51 is formed on the upper surface of the base holder 50, holds the bottom of the support base 10 inside, and forms side walls on both sides of the base holder 50. The hooking arm 53 is formed on both side walls 52 to securely hold the support base 10 on the base holder 50 and engages with the front ends of both side boards 12 of the support base 10.

  A sliding channel 54 is formed at the front end of the base holder 50 to hold the anvil element 45 movably. In the preferred embodiment, the slip channel 54 is defined between a front tab 541 and two side tabs 542 formed in the vicinity of the side wall 52.

  Referring to FIGS. 1 and 4, for stapling, the trigger assembly 30 is pulled up and the trigger lever 31 is pivoted with respect to the support base 10 so that the pivot 35 moves into the rail on the auxiliary lever 34. Slide along. As a result, the magazine cap 23 is pivoted with respect to the support 10 by the trigger lever 31, and the staple magazine 21 is opened for packing staples. Therefore, refilling staples into a stapler is convenient and easy. Furthermore, due to the limiting effect on the pivot 35 by the rail on the auxiliary lever 34, the trigger lever 31 can only be pivoted to a position that is substantially perpendicular to the support 10. Therefore, the center of gravity of the stapler is always maintained in the area of the support base 10, and the stapler is stably maintained on a plane even when the trigger assembly 30 is pivoted to the refill position.

  Referring to FIGS. 1, 5, and 8, when the trigger assembly 30 is pressed, the auxiliary lever 34 moves downward, causing the trigger lever 31 to pivot downward about the center of the main shaft 13. The drive tab 32 is moved downward to press one of the staples so that it is released from the staple magazine 21. The released staple legs are folded back at the anvil element 45.

  The equation below demonstrates that this stapler is labor saving and convenient to use. These equations include an input F1 at the front end of the auxiliary lever 34, an internal force F2 on the pivot 35, and an output F3 at the front end of the trigger lever 31. The ratio of the length of the auxiliary lever 34 to the distance from the pivot 35 to the pivot stub 341 is 5. The ratio of the length of the trigger lever 31 to the distance from the pivot 35 to the main shaft 13 is 2.

  Since the output F3 is 2.5 times the input F1, this stapler is labor saving.

  5 to 7, when the trigger lever 31 moves downward, the pushing element 36 moves downward together with the trigger lever 31 and pushes the pushed segment on the slide base 41. As a result, the slide base 41 is moved by being pushed toward the rear end of the support base 10, and the blocking effect on the mobile base 43 is cancelled. For this reason, the movable table 43 provided with the anvil element 45 descends and turns back the legs of the released staples.

  Since the pushing element 36 is pivotally attached to the center of the trigger lever 31, the leg flattening means 40 is pushed directly by the pushing element 36. Thus, the staple structure is simplified and the stapler operation is precisely controlled. Furthermore, the trigger assembly 30 is designed to have a labor-saving performance as a lever device, and the stapler's labor-saving lever system and transmission system according to the present invention have a single fulcrum. The action of the components of the trigger assembly 30 at different operating times is efficiently transferred to the leg flattening means 40 via the pushing element 36. Therefore, since the operation time of the trigger assembly 30 is short, the stapler is labor-saving and its structure is simplified.

The perspective view of the stapler which concerns on this invention. The disassembled perspective view of the stapler in FIG. The rear perspective view of the stapler in FIG. FIG. 2 is a perspective view of the stapler of FIG. 1 showing the stapler opened for staple refilling. The partial cross section side view of the stapler in FIG. The partial cross-section operation side view of the stapler of FIG. 1 which shows the state by which the trigger assembly was pressed. The partial cross-section operation side view of the stapler in FIG. 1 which shows the slide base of the leg flattening means slid by the extrusion element. FIG. 7 is a side view of the stapler in FIG. 6 showing lines of force.

Explanation of symbols

10 Support stand 12 Side board 14 Magazine spring 20 Magazine assembly
30 Trigger assembly 34 Auxiliary lever 36 Pushing element 40 Leg flattening means 41 Sliding table 43 Moving table 45 Anvil element

Claims (11)

A stapler,
A support base having a front end and a rear end;
A magazine assembly pivotally connected to a rear end of the support;
A trigger assembly pivotally connected to a rear end of the support above the magazine assembly;
Leg flattening means attached to the support base,
The trigger assembly includes a trigger lever pivotally connected to a rear end of the support base, and a pusher element pivotally attached to the trigger lever at a pivot axis. Has two extrusion arms extending to
The leg flattening means includes a slide base, a movable base, and an anvil element,
The slide base is slidably attached to the support base and has an extruded segment formed on the slide base, and the extruded segment is selectively pushed out by a push arm that is the push element,
The moving table is operatively connected to the support table and selectively blocked by the slide table so as to prevent the transfer table from descending before the slide table slides against the support table. An elongated hole formed in the
The anvil element is mounted in an elongated hole in the moving platform ;
The stapler assembly further includes an auxiliary lever pivotally connected to a rear end of a support base, and the auxiliary lever includes a rail on which the pivot shaft is slidably attached . The support base has a main shaft attached to the rear end thereof,
The magazine assembly and the trigger lever are pivotally attached to the support base by a main shaft,
The stapler according to claim 1, wherein the pivot axis of the trigger assembly, the pushing arm of the pushing element, and the pushed-out segment of the slide base are arranged along the same circumference around the main axis. . The extrusion element has a top plate with two ends;
The pusher arms are curved and extend from both ends of the top plate, each pusher arm having an axial hole aligned with each other;
The stapler of claim 2, wherein the pivot axis of the trigger assembly is attached through a pivot hole in the pusher arm for pivotally connecting the pusher element to the trigger lever. The magazine assembly includes a magazine cap having a top and a hook formed on the top;
The stapler of claim 3, wherein the top plate of the pusher element has an engaging tap that engages the hook on the magazine cap. The trigger lever has a staple drive tab attached to its front end and slidably engaged with the magazine cap;
The stapler according to claim 4, wherein a trigger spring is mounted between and in contact with the trigger lever and the magazine cap. The auxiliary lever has two side boards formed at the top and descending from the top,
The rail of the auxiliary lever includes two slots respectively defined in the both side boards,
The stapler according to claim 5 , wherein both ends of the pivot axis of the trigger assembly are respectively held in slots on both side boards of the auxiliary lever. The trigger lever has two axial holes defined at the top thereof and aligned with each other;
The stapler according to claim 6 , wherein the pivot axis of the trigger assembly is attached to a shaft hole of the trigger lever. The support includes an elongated bottom plate having a front end, a rear end, a pair of guide holes defined in the front end, and a mounting hole defined in the front end;
The sliding block, a plurality of engaging tabs projecting from the bottom portion is formed at the bottom thereof, respectively slidably engage in the guide hole and the mounting hole of the support base of the bottom plate, according to claim 7 Stapler. The support platform forms two pivot tabs on its bottom plate;
The moving table forms two pivot stubs at a rear end thereof, and is rotatably connected to the pivot tab on the supporting table to pivotally connect the moving table to the supporting table. The stapler according to claim 8 . The slide has a contact rib formed at a front end thereof;
The stapler according to claim 9 , wherein the moving table has a contact flange formed at a bottom portion at a front end thereof and contacting a contact rib on the slide table. Further comprising a base holder which is attached to the bottom of the support base, the base holder comprises the slip channels defined at the front end,
The anvil element, the movably mounted on the slip channels of the base holder, stapler according to claim 1 or 10.

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