CN207480517U - A kind of labor-saved stapler - Google Patents

Abstract

The utility model discloses a kind of labor-saved staplers, order needle assemblies, the base assembly and binding assembly including a base assembly, a binding assembly, one and order needle assemblies tail portion being articulated and connected by the first axis pin；Further include the laborsaving component being interconnected to constitute by a lever dolly and a lever arm and a plastic housing upper cover etc., the positioning hook groove of the support chip set on metab in the set collar and base assembly of lower connecting hole that the lever dolly is equipped with is fastened and connected, the upper connecting hole that lever dolly is equipped with is ordered the first pin shaft hole set on plate with the upper pressure ordered in needle assemblies and is hinged, the pin shaft hole that the lever arm tail portion is equipped with and the upper pressure ordered in needle assemblies are ordered the axis pin both ends head being slidably connected in the horizontal concrete chute hole that plate tail portion is set and are fixedly connected, the upper cover connecting hole that the plastic housing upper cover tail portion is equipped with is hinged with the first axis pin.The labor-saved stapler of three-level lever combination structure is formed after the connection combination of above-mentioned component, during using bookbinding, several times more laborsaving than common stapler, and it is good to bind effect.

Description

A kind of labor-saved stapler

Technical field

The utility model is related to office appliances, and in particular to a kind of labor-saved stapler.

Background technology

Stapler is a kind of common office equipment of people, is mainly used for multipage binding papers together in order to protecting It deposits.Traditional stapler structure includes base assembly, is hingedly connected with binding assembly with base assembly and orders needle assemblies, orders needle group Part head is equipped with pressure and orders piece, and the pedestal head ordered below piece is pressed to be equipped with down and orders slot.During stapled paper, hand pressure stapler orders needle assemblies Upper cover head makes pressure order after the staple filled in the dress needle casket of binding assembly is pressed downward and penetrates paper by piece, and ordering slot under makes Staple outwardly or inwardly turns down the binding work completed to paper.This stapler places one's entire reliance upon hand in forwarding Directly press, need larger active force, for a long time using user's hand fatigue pain is be easy to cause, particularly bookbinding compared with During more paper, if the active force of hand is less than required pressing force, it will cause staple bending or paper can not be penetrated, influences to fill Order effect.

Utility model content

Technical problem to be solved in the utility model is in view of the deficiencies of the prior art, and to provide a kind of former using lever Manage a kind of labor-saved stapler of novel structure of Curve guide impeller.

Technical solution is used by the utility model：A kind of labor-saved stapler, including a base assembly, a bookbinding group Part, one order needle assemblies, the base assembly and binding assembly and orders needle assemblies tail portion to be hinged by the first axis pin；Its feature exists In：

The middle and back both sides of metab in the base assembly are equipped with symmetrical support chip, supported on both sides rear side Face is equipped with symmetrical arc-shaped positioning hook groove；

The middle and back both sides that the upper pressure ordered in needle assemblies orders plate are equipped with corresponding the first concentric pin shaft hole, on this The two sides of tail that pressure orders plate is equipped with symmetrical horizontal concrete chute hole, and third axis pin is slidably connected in horizontal concrete chute hole, is ordered in upper pressure The arc groove that the two sides of tail bottom surface of plate is additionally provided with；

The labor-saved stapler has further included a laborsaving component, and the laborsaving component includes a lever dolly, a lever Arm, a plastic housing upper cover, the lever dolly both sides be equipped with distribution corresponding concentric and triangular in shape upper and lower connecting hole and after connect Hole is connect, set collar is respectively equipped in the lower connecting hole of lever dolly both side surface and the nose end oral area of rear connecting hole；The thick stick Lever arm head on both sides are equipped with corresponding concentric sliding rod hole, which is equipped with corresponding the second concentric axis pin Hole, the lever arm rear portion lower end both sides are equipped with corresponding concentric lever connecting hole；The plastic housing upper cover lumen caudal both sides Surface is equipped with corresponding concentric upper cover connecting hole, and cover cavity middle top surface both sides are equipped with lug, both sides lug phase in the plastic housing Corresponding inner surface is respectively equipped with caulking groove, and cover cavity front part sides surface is equipped with the horizontal stroke that corresponding convex ribs are formed in the plastic housing To sliding groove；The connection collar for the rear connecting hole that the lever connecting hole that the lever arm both sides are set is set with lever dolly both sides is distinguished Be nested connection, and lever arm is made to be hinged and connected with lever dolly, and slip is set in the sliding rod hole that the lever arm head on both sides are set Bar, sliding bar both ends head merging plastic housing on cover cavity front part sides set slide laterally in slot with sliding groove holding be slidably matched Connection；It is embedded in the caulking groove of lug that cover cavity middle top surface both sides are set in the plastic housing and is fixed with second spring piece；

The lever dolly and the above-mentioned upper pressure ordered in needle assemblies order plate by the upper connecting hole that lever dolly both sides are set with Upper pressure is ordered the second axis pin set in the first pin shaft hole that plate middle and back both sides are set and is hinged and connected, which sets Lower connecting hole on set collar and above-mentioned base assembly in the support chip that sets of metab middle and back both sides on positioning Hook groove is fastened and connected, and in metab tail portion top surface, riveting has the first spring leaf, and the head upper surface of the first spring leaf is resisted against Lever dolly inner top surface makes the set collar on the lower connecting hole that lever dolly both side surface sets be acted on without external force backward Under positioning hook groove holding on the support chip that is set always with metab middle and back both sides be fastened and connected state；Above-mentioned lower connecting hole On set collar and support chip on positioning hook groove be fastened and connected under state, the axis of the axial line of the second axis pin and lower connecting hole Heart line remains in same plane and perpendicular to the surface of metab；

The second pin shaft hole that the lever arm two sides of tail is set orders what plate tail portion was set with the above-mentioned upper pressure ordered in needle assemblies The head at third axis pin both ends being slidably connected in horizontal concrete chute hole is fixedly connected；

Both ends of the upper cover connecting hole that the plastic housing upper cover lumen caudal both side surface is set respectively with the first axis pin are hinged It is connected, the tail portion bottom table of fixed second spring piece is embedded on the caulking groove of lug that cover cavity middle top surface both sides are set in the plastic housing Face is resisted against the tail portion upper surface that the above-mentioned upper pressure ordered in needle assemblies orders plate；What the two sides of tail bottom surface that the upper pressure orders plate was equipped with The axis perimeter surface of arcuate recess surface and the first axis pin is mutually leaned on.

Preferably, the sliding bar both ends head is also respectively installed with two sliding shoes, and two sliding shoes are respectively implanted plastic housing What upper cover cavity front part sides were set slide laterally keeps being slidably connected in slot with sliding groove.

Preferably, sliding sleeve is gone back in the middle part of the third axis pin equipped with slip ring, slip ring circumferential upper surface orders plate with upper pressure Upper surface is mutually leaned in tail portion.

The structure of following three-level lever combination is formed after above-mentioned stapler mechanism member interconnection combination：

First order lever：The first axis pin in stapler is the fulcrum of first order lever, and the power arm of first order lever is certainly To the fulcrum of first order lever, the resistance arm of first order lever covers plastic housing upper cover head A points from the sliding rod hole of lever arm front end For the sliding bar of dress to the fulcrum of first order lever, the length ratio of power arm and resistance arm is 1.6:1；

Second level lever：The connection collar of the rear connecting hole of lever dolly in stapler is the fulcrum of second level lever, The sliding bar that the power arm of second level lever is set with from the sliding rod hole of lever arm front end is to the fulcrum of second level lever, the second level The third axis pin that the resistance arm of lever is connected from the second pin shaft hole of lever arm is to the fulcrum of second level lever, and power arm is with hindering The length ratio of the arm of force is 3.1:1；

Third level lever：The second axis pin in stapler is the fulcrum of third level lever, and the power arm of third level lever is certainly Upper pressure orders the third axis pin that is slidably connected in the horizontal concrete chute hole of plate tail portion to the fulcrum of third level lever, the resistance of third level lever Arm orders wrench portion B points to the fulcrum of third level lever from upper pressure, and the length ratio of power arm and resistance arm is 0.6:1.

Compared with prior art, the utility model has the advantage of：The laborsaving principle of structure application bar bar of this stapler is set Meter, by adding laborsaving component on the basis of common stapler, laborsaving component and improved common stapler thermomechanical components are mutual Three-level lever combination structure is formed to reach laborsaving purpose after connection combination.3 times more laborsaving than common stapler during use, and have Reasonable design, dress needle is convenient, binds the characteristics of effect is good, is particularly suitable for using when binding more paper.

Description of the drawings

Fig. 1 is the dimensional structure diagram of the utility model embodiment；

Fig. 2 is the schematic cross-sectional view of the utility model embodiment；

Fig. 3 is the sectional block diagram of the utility model embodiment plastic housing upper cover；

Fig. 4 is the sliding bar connection that the utility model embodiment plastic housing upper cover is connect with second spring piece and lever arm head Relation schematic diagram；

Fig. 5 is the three-dimensional exploded view of the utility model embodiment；

Fig. 6 is the first order lever construction schematic diagram of the utility model embodiment；

Fig. 7 is the second level lever construction schematic diagram of the utility model embodiment；

Fig. 8 is the third level lever construction schematic diagram of the utility model embodiment；

Fig. 9 is the mechanics schematic diagram of first, second and third grade of lever combination of the utility model embodiment.

In figure：1st, base assembly, 11, metab, 12, plastic housing pedestal, 13, fastening screw, 14, under order slot, 15, under order Slot post, 16, under order slot spring, 17, support chip, 171, positioning hook groove, 2, binding assembly, 21, bookbinding casket, 22, axostylus axostyle, 23, Push away and order spring, 24, pushing device, 3, order needle assemblies, 31, upper pressure order plate, 32, push and order plate, 33, pressure order piece, 34, pressure order plate bullet Spring, 35, protecgulum, the 311, first pin shaft hole, 312, horizontal concrete chute hole, 313, groove, 4, laborsaving component, 41, lever dolly, 411, Upper connecting hole, 412, lower connecting hole, 413, rear connecting hole, 42, lever arm, 421, sliding rod hole, the 422, second pin shaft hole, 423, thick stick Lever attachment hole, 43, plastic housing upper cover, 431, upper cover connecting hole, 432, lug, 433, caulking groove, 434, slide laterally slot, 44, slide Bar, 45, sliding shoe, 46, second spring piece, the 47, second axis pin, 48, third axis pin, 49, slip ring, the 5, first axis pin 5,6 orders casket Compression spring, 7, pull rod, the 8, first spring leaf.

Specific embodiment

The utility model embodiment is described in further detail below in conjunction with the accompanying drawings.

Referring to shown in Fig. 1 to Fig. 6, labor-saved stapler provided by the utility model is bound including a base assembly 1, one Component 2, one orders needle assemblies 3, a laborsaving component 4, and the base assembly 1 includes a metab 11, plastic housing pedestal 12, described 11 both ends of metab are connect with 12 snapping of plastic housing pedestal, and in 12 middle and back of plastic housing pedestal, setting is fastened with fastening screw 13；Institute The setting of pedestal head is stated to be connected with down and order slot 14, under order riveting sleeve on slot 14 and be equipped with down to order slot post is ordered under slot spring 16 15；11 two sides of tail of metab is equipped with corresponding concentric pin shaft hole.

The binding assembly 2 includes the bookbinding casket 21 of a strip, along the length of dress needle casket in needle casket 21 is filled Direction, which fastens, installs an elongated axostylus axostyle 22, and suit one, which pushes away, on the axostylus axostyle 22 orders spring 23, pushes away the front end for ordering spring 23 and suit It is connected in the pushing device 24 being located in dress needle casket of the axostylus axostyle leading portion, pushes away and order spring 23 pushing device 24 is pushed to send to realize and order work( Energy；21 two sides of tail of bookbinding casket is equipped with corresponding concentric pin shaft hole.

Described needle assemblies 3 of ordering include that pressure on a strip orders plate 31, plate 32 is ordered in strip pushing, and plate is ordered in upper pressure Front end is snapped with pressure and orders piece 33, and pressure is ordered and guide groove is equipped among piece 33, and guide groove orders what wrench portion front end was equipped with the pushing Positioning plush copper is nested and can slide up and down snapping, and the upper surface that 32 forepart of plate is ordered in pushing presses the bottom surface for ordering 31 forepart of plate to set with upper It puts and is connected with pressure and orders flat spring 34；The upper pressure, which orders 31 head of plate and is fastened and connected, protecgulum 35.

It the base assembly 1 and binding assembly 2 and orders needle assemblies 3 and is articulated and connected together by the first axis pin 5；The pedestal It is set on the 12 rear upper surface pillar of plastic housing pedestal of component 1 and orders casket compression spring 6, order 6 top of casket compression spring across base assembly 1 After the through-hole that 11 rear portion opposite position of metab is equipped with, the 21 corresponding bottom of dress needle casket of top end face and binding assembly 2 Surface is mutually by connection；Pull rod 7, the tail portion head of pull rod 7 are snapped in the plush copper that 24 top surface of pushing device of the binding assembly 2 is equipped with End both sides are equipped with the concentric pylone articulated connection that connection protruding shaft is ordered 32 rear portion both sides of plate and be equipped with ordering the pushing of needle assemblies 3.More than For the prior art, it is characterised in that：

The middle and back both sides of metab 11 in the base assembly 1 are equipped with symmetrical support chip 17, supported on both sides 17 trailing flank of piece is equipped with symmetrical arc-shaped positioning hook groove 171.

The middle and back both sides that the upper pressure ordered in needle assemblies 3 orders plate 31 are equipped with corresponding the first concentric pin shaft hole 311, pressure orders the two sides of tail of plate 31 and is equipped with symmetrical horizontal concrete chute hole 312 on this, and the is slidably connected in horizontal concrete chute hole 312 Three axis pins 48, in the upper arc groove 313 for pressing and ordering the two sides of tail bottom surface of plate 31 and being additionally provided with.

The laborsaving component 4 includes a lever dolly 41, a lever arm 42, a plastic housing upper cover 43, the lever dolly 41 both sides are equipped with the upper and lower connecting hole 411,412 and rear connecting hole 413 of distribution corresponding concentric and triangular in shape, in lever branch The lower connecting hole 412 of 41 both side surface of frame and the nose end oral area of rear connecting hole 413 are respectively equipped with set collar；The lever arm 42 Head on both sides are equipped with corresponding concentric sliding rod hole 421, which is equipped with corresponding the second concentric axis pin Hole 422, the 42 rear portion lower end both sides of lever arm are equipped with corresponding concentric lever connecting hole 423；In the plastic housing upper cover 43 Chamber two sides of tail surface is equipped with corresponding concentric upper cover connecting hole 431, which is equipped with Lug 432,432 corresponding inner surface of both sides lug are respectively equipped with caulking groove 433, the 43 inner cavity front part sides table of plastic housing upper cover Face slides laterally slot 434 equipped with what corresponding convex ribs were formed；The lever connecting hole 423 and lever that 42 both sides of lever arm are set The connection collar for the rear connecting hole 413 that 41 both sides of stent are set is nested connection respectively, and lever arm 42 is made hingedly to connect with lever dolly 41 Connect it is connected, in the sliding rod hole 421 that 42 head on both sides of lever arm are set sliding sleeve be equipped with sliding bar 44,44 both ends head of sliding bar Sliding sleeve is equipped with two sliding shoes 45 respectively, and what two sliding shoes 45 were respectively implanted that 43 inner cavity front part sides of plastic housing upper cover set slides laterally It keeps being slidably connected with sliding groove in slot 434；The lug 432 that the 43 inner cavity middle top surface both sides of plastic housing upper cover are set it is embedding It is embedded in slot 433 and is fixed with second spring piece 46.

The lever dolly 41 orders the upper company that plate 31 is set by 41 both sides of lever dolly with the above-mentioned upper pressure ordered in needle assemblies 3 It connects hole 411 and orders the second axis pin 47 set in the first pin shaft hole 311 that 31 middle and back both sides of plate set with upper pressure and be hinged and connected, the thick stick After in the set collar on lower connecting hole 412 and the metab 11 in above-mentioned base assembly 1 that 41 both side surface of bar stent is set The positioning hook groove 171 on support chip 17 that portion both sides are set is fastened and connected, and in 11 tail portion top surface of metab, riveting has the first spring Piece 8, the head upper surface of the first spring leaf 8 are resisted against 41 inner top surface of lever dolly, set down 41 both side surface of lever dolly The support that set collar on connecting hole 412 is set under without external force effect backward with 11 middle and back both sides of metab always Positioning hook groove 171 on piece 17 keeps the state that is fastened and connected；On set collar and support chip 17 on above-mentioned lower connecting hole 412 Positioning hook groove 171 is fastened and connected under state, and the axial line of the axial line of the second axis pin 47 and lower connecting hole 412 remains in same Plane and perpendicular to the surface of metab 11.

The second pin shaft hole 422 that 42 two sides of tail of lever arm is set orders plate 31 with the above-mentioned upper pressure ordered in needle assemblies 3 The head at 48 both ends of third axis pin being slidably connected in the horizontal concrete chute hole 312 that tail portion is set is fixedly connected, in third axis pin 48 Portion's sliding sleeve is equipped with slip ring 49, and 49 circumferential upper surface of slip ring presses upper surface in the tail portion for ordering plate 31 mutually to lean on upper, when pressure lever The head of arm 42 can make third axis pin 48 in upper pressure orders the horizontal concrete chute hole 312 of plate 31 when the tail portion of lever arm 42 upwarps It slides, while 49 circumferential surface of slip ring is driven to be close to pressure and orders upper surface rotation in the tail portion of plate 31.

The upper cover connecting hole 431 that the 43 lumen caudal both side surface of plastic housing upper cover is set both ends with the first axis pin 5 respectively Portion is articulated and connected, and fixed second bullet is embedded on the caulking groove 433 of lug 432 which sets The tail portion bottom surface of reed 46 is resisted against the tail portion upper surface that the above-mentioned upper pressure ordered in needle assemblies 3 orders plate 31, and the upper pressure orders plate 313 surface of arc groove and the axis perimeter surface of the first axis pin 5 that 31 two sides of tail bottom surface is equipped with mutually are leaned on, and are in quiet in stapler State state or when opening up upper and lower pressure and ordering plate 31,32 toward bookbinding 21 built-in staple of casket, utilizes the elastic force of second spring piece 46 Effect can make 313 surface of arc groove that the two sides of tail bottom surface for ordering plate 31 is pressed to be equipped with all with the axis of the first axis pin 5 always Surface is kept mutually by connection.

The utility model stapler of above-mentioned component composition, when staple to be loaded, can up lift plastic housing upper cover 43 It opens, the set collar of the lower connecting hole 412 of lever dolly 41 is forced to be detached from and fastens company with the positioning hook groove 171 on support chip 17 It connects, and then opens upper and lower pressure and order plate 31,32 and pull the pull rod 7 being connect with pushing device 24, moved after making pushing device 24, you can with It is ordered in bookbinding casket 21 and staple is packed into slot, then plastic housing upper cover 43 is deflected into lid down and is closed.

The labor-saving structure of the utility model stapler：The laborsaving principle design of structure application bar bar of this stapler, by above-mentioned Stapler mechanism member forms the structure of three-level lever combination to reach laborsaving purpose after being connected with each other combination：Referring to Fig. 6 to Fig. 8 institutes Show, fulcrum Z1 of the first axis pin 5 in above-mentioned stapler for first order lever, the rear connecting hole of the lever dolly 41 in stapler 413 connection collar is the fulcrum Z2 of second level lever, and the second axis pin 47 in stapler is the fulcrum Z3 of third level lever.

(first order lever shown in Figure 6：), the power arm L1 of first order lever is from 43 head A points of plastic housing upper cover to The sliding bar that the fulcrum Z1 of primary lever, the resistance arm L2 of first order lever are set with from the sliding rod hole 421 of 42 front end of lever arm 44 to the fulcrum Z1, power arm L1 and resistance arm L2 of first order lever length ratio be 1.6:1.

Slip shown in Figure 7, that the power arm L3 of second level lever is set with from the sliding rod hole 421 of 42 front end of lever arm To the fulcrum Z2 of second level lever, the resistance arm L4 of second level lever connects bar 44 from the second pin shaft hole 422 of lever arm 42 Third axis pin 48 to second level lever fulcrum Z2, power arm L3 and resistance arm L4 length ratio be 3.1:1.

Shown in Figure 8, the power arm L5 of third level lever orders the company of slip in 31 tail portion horizontal concrete chute hole 312 of plate from upper pressure For the third axis pin 48 connect to the fulcrum Z3 of third level lever, the resistance arm L6 of third level lever orders 31 head B points of plate extremely from upper pressure The length ratio of the fulcrum Z3 of third level lever, power arm L5 and resistance arm L6 are 0.6:1.

The laborsaving principle of the utility model stapler：It is shown in Figure 9, such as to the power arm L1 starting points of first order lever A applies the active force pushed as F, and it is F1 to be transferred to the active force that resistance arm L2 distal points B obtains by lever principle, due to L1 with The length ratio of L2 is 1.6:1, then F1 is 1.6 times of F, and B points are also the power arm L3 starting points of second level lever, similarly, F1 It is F2 to be transferred to the active force that resistance arm L4 distal points C is obtained, since the length ratio of L3 and L4 is 3.1:1, then F2 is F1's 3.1 times, C points are also the power arm L5 starting points of third level lever, and similarly, F2 is transferred to the work that resistance arm L6 distal points D is obtained The length ratio for being firmly F3, L5 and L6 is 0.6:1, then F3 is 0.6 times of F2.Its calculation formula is as follows：F × 1.6= F1；F1 × 3.1=F2：Obtain F2=(F × 1.6) × 3.1 ≈ 5F；F3=0.6 × F2；Obtain F3=(5F) × 0.6=3F.With The power arm L1 starting points A of upper first order lever is 43 head of plastic housing upper cover of this stapler, and third level lever resistance arm L6 is last Endpoint D is that the upper pressure of this stapler orders the head that the connection pressure of plate 31 orders piece 33, that is to say, that as long as this stapler is in use, use As soon as person applies directed force F on stapler upper cover head, the pressure of stapler, which orders piece, can obtain the power of 3 times of F, reach bookbinding labour-saving Effect.

The embodiment of above-described the utility model does not form the restriction to scope of protection of the utility model, appoints It is new to should be included in this practicality for modifications, equivalent substitutions and improvements made by where within the spiritual principles of the utility model etc. Within the claims of type.

Claims (3)

1. a kind of labor-saved stapler orders needle assemblies (3), the pedestal including a base assembly (1), a binding assembly (2), one Component (1) and binding assembly (2) and order needle assemblies (3) tail portion by the first axis pin (5) be articulated and connected；It is characterized in that：

The middle and back both sides of metab (11) in the base assembly (1) are equipped with symmetrical support chip (17), and two is collateral Blade (17) trailing flank is equipped with symmetrical arc-shaped positioning hook groove (171)；

The middle and back both sides that the upper pressure ordered in needle assemblies (3) orders plate (31) are equipped with corresponding the first concentric pin shaft hole (311), the two sides of tail that pressure orders plate (31) on this is slided equipped with symmetrical horizontal concrete chute hole (312) in horizontal concrete chute hole (312) Third axis pin (48) is connected with, in the upper arc groove (313) for pressing and ordering the two sides of tail bottom surface of plate (31) and being additionally provided with；

The labor-saved stapler has further included a laborsaving component (4), the laborsaving component (4) including a lever dolly (41), One lever arm (42), a plastic housing upper cover (43), lever dolly (41) both sides are equipped with distribution corresponding concentric and triangular in shape Upper and lower connecting hole (411), (412) and rear connecting hole (413), in the lower connecting hole (412) of lever dolly (41) both side surface Set collar is respectively equipped with the nose end oral area of rear connecting hole (413)；Lever arm (42) head on both sides are equipped with corresponding coaxial The sliding rod hole (421) of the heart, lever arm (42) two sides of tail are equipped with corresponding concentric the second pin shaft hole (422), the lever arm (42) rear portion lower end both sides are equipped with corresponding concentric lever connecting hole (423)；Plastic housing upper cover (43) lumen caudal two Side surface is equipped with corresponding concentric upper cover connecting hole (431), which is equipped with lug (432), both sides lug (432) corresponding inner surface is respectively equipped with caulking groove (433), plastic housing upper cover (43) the inner cavity forepart two Side surface slides laterally slot (434) equipped with what corresponding convex ribs were formed；The lever connecting hole that lever arm (42) both sides are set (423) the connection collar of rear connecting hole (413) set with lever dolly (41) both sides is nested connection respectively, make lever arm (42) and Lever dolly (41) is hinged and connected, and sliding sleeve is equipped with sliding bar in the sliding rod hole (421) that lever arm (42) head on both sides are set (44), sliding bar (44) both ends head merging plastic housing upper cover (43) inner cavity front part sides set slide laterally in slot (434) with cunning Dynamic slot keeps sliding connection；The caulking groove (433) of lug (432) that plastic housing upper cover (43) the inner cavity middle top surface both sides are set In be embedded in be fixed with second spring piece (46)；

The lever dolly (41) is ordered plate (31) with the above-mentioned upper pressure ordered in needle assemblies (3) and is set by lever dolly (41) both sides Upper connecting hole (411) presses middle the second axis pin (47) set of the first pin shaft hole (311) ordered plate (31) middle and back both sides and set with upper It is hinged and connected, the set collar and above-mentioned base assembly (1) on lower connecting hole (412) which sets In the support chip (17) that sets of metab (11) middle and back both sides on positioning hook groove (171) be fastened and connected, in metab (11) riveting of tail portion top surface has the first spring leaf (8), and the head upper surface of the first spring leaf (8) is resisted against in lever dolly (41) Top surface makes the set collar on the lower connecting hole (412) that lever dolly (41) both side surface sets be acted on without external force backward Under positioning hook groove (171) holding on the support chip (17) that is set always with metab (11) middle and back both sides be fastened and connected shape State；Set collar on above-mentioned lower connecting hole (412) is fastened and connected with the positioning hook groove (171) on support chip (17) under state, The axial line of the axial line of second axis pin (47) and lower connecting hole (412) remains in same plane and perpendicular to metab (11) surface；

The second pin shaft hole (422) that described lever arm (42) two sides of tail is set orders plate with the above-mentioned upper pressure ordered in needle assemblies (3) (31) head at third axis pin (48) both ends being slidably connected in the horizontal concrete chute hole (312) that tail portion is set is fixedly connected；

The upper cover connecting hole (431) that plastic housing upper cover (43) the lumen caudal both side surface is set respectively with the first axis pin (5) two End is articulated and connected, and is embedded in and fixes on the caulking groove (433) of lug (432) which sets The tail portion bottom surface of second spring piece (46) be resisted against the tail portion upper table that the above-mentioned upper pressure ordered in needle assemblies (3) orders plate (31) Face；Upper arc groove (313) surface that the two sides of tail bottom surface for ordering plate (31) is pressed to be equipped with and the axis weekly form of the first axis pin (5) Face is mutually leaned on；

The structure of following three-level lever combination is formed after above-mentioned stapler mechanism member interconnection combination：

First order lever：Fulcrum (Z1) of the first axis pin (5) for first order lever in stapler, the power arm of first order lever (L1) from plastic housing upper cover (43) head A points to the fulcrum (Z1) of first order lever, the resistance arm (L2) of first order lever is from lever The sliding bar (44) being set in the sliding rod hole (421) of arm (42) front end to first order lever fulcrum (Z1), power arm (L1) with The length ratio of resistance arm (L2) is 1.6:1；

Second level lever：The connection collar of the rear connecting hole (413) of lever dolly (41) in stapler is second level lever Fulcrum (Z2), the sliding bar of power arm (L3) suit from the sliding rod hole (421) of lever arm (42) front end of second level lever (44) to the fulcrum (Z2) of second level lever, the resistance arm (L4) of second level lever is from the second pin shaft hole of lever arm (42) (422) the third axis pin (48) connected in is to the fulcrum (Z2) of second level lever, the length of power arm (L3) and resistance arm (L4) Ratio is 3.1:1；

Third level lever：Fulcrum (Z3) of the second axis pin (47) for third level lever in stapler, the power of third level lever Arm (L5) orders the third axis pin (48) that is slidably connected in plate (31) tail portion horizontal concrete chute hole (312) to third level lever from upper pressure Fulcrum (Z3), the resistance arm (L6) of third level lever are ordered plate (31) head B points to the fulcrum (Z3) of third level lever from upper pressure, are moved The length ratio of the arm of force (L5) and resistance arm (L6) is 0.6:1.

2. a kind of labor-saved stapler according to claim 1, it is characterised in that：Described sliding bar (44) the both ends head is also Sliding sleeve is respectively implanted the horizontal stroke that plastic housing upper cover (43) inner cavity front part sides are set equipped with two sliding shoes (45), two sliding shoes (45) respectively It keeps being slidably connected with sliding groove into sliding groove (434).

3. a kind of labor-saved stapler according to claim 1, it is characterised in that：It is also sliding in the middle part of the third axis pin (48) Dynamic to be set with slip ring (49), slip ring (49) circumferential upper surface presses upper surface in the tail portion for ordering plate (31) mutually to lean on upper.