CN110666748B - Stapling machine - Google Patents

Stapling machine Download PDF

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Publication number
CN110666748B
CN110666748B CN201910957043.1A CN201910957043A CN110666748B CN 110666748 B CN110666748 B CN 110666748B CN 201910957043 A CN201910957043 A CN 201910957043A CN 110666748 B CN110666748 B CN 110666748B
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China
Prior art keywords
labor
upper cover
stapler
saving
hinge
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CN201910957043.1A
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Chinese (zh)
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CN110666748A (en
Inventor
赵卓君
徐福荣
彭杰
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Shanghai M&G Stationery Inc
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Shanghai M&G Stationery Inc
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Priority to CN201910957043.1A priority Critical patent/CN110666748B/en
Publication of CN110666748A publication Critical patent/CN110666748A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C5/00—Manually operated portable stapling tools; Hand-held power-operated stapling tools; Staple feeding devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C5/00—Manually operated portable stapling tools; Hand-held power-operated stapling tools; Staple feeding devices therefor
    • B25C5/10—Driving means
    • B25C5/11—Driving means operated by manual or foot power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C7/00—Accessories for nailing or stapling tools, e.g. supports

Abstract

The disclosure provides a stapler, which comprises a base, a staple channel, a staple pressing sheet assembly, an upper cover and a labor-saving assembly. The nail path, the nail pressing piece component and the upper cover are respectively hinged at the rear end of the base. The labor-saving component comprises a labor-saving lever, a bracket and a connecting rod. The labor-saving lever is hinged to the nail pressing plate assembly through a hinge part in the middle, the labor-saving lever is provided with a first end and a second end, the distance between the hinge part and the first end is smaller than the distance between the hinge part and the second end, and a first hinge shaft is arranged at the first end. The bracket is arranged on the base and positioned below the labor-saving lever, and a hole groove is formed in the position, corresponding to the first end, of the bracket. One end of the connecting rod is hinged with the upper cover, and the other end is hinged with the second end. When the upper cover is pressed, the upper cover drives the labor-saving lever to rotate relative to the nail sheet pressing assembly through the connecting rod, so that the first hinge shaft moves into the hole groove, and the first end is rotatably connected to the support through the first hinge shaft. Accordingly, the present disclosure can achieve a labor saving effect of reducing the acting force required for stapler pressing.

Description

Stapling machine
Technical Field
The disclosure relates to the technical field of office equipment, in particular to a stapler.
Background
Staplers are widely used in the field of office equipment, where their main function is to bind together sheets of paper. The traditional stapler is limited by the structure, the stapling function is realized completely depending on the direct pressure of a user in the stapling process, the user is required to apply larger acting force, the hand fatigue and pain of the user are easily caused after the stapler is used for a long time, and particularly, when more paper is stapled, if the applied acting force is insufficient, the staple can be bent or cannot penetrate through the paper, the stapling effect is influenced, and even the stapling function cannot be realized.
Disclosure of Invention
It is a primary object of the present disclosure to overcome at least one of the above-mentioned deficiencies of the prior art and to provide a stapler that saves the user's effort.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
according to one aspect of the present disclosure, a stapler is provided that includes a base, a staple path, a staple pressing tab assembly, and an upper cover. The nail channel, the nail pressing piece assembly and the upper cover are respectively hinged to the rear end of the base. The stapler further comprises a labor-saving assembly, and the labor-saving assembly comprises a labor-saving lever, a support and a connecting rod. The labor-saving lever is hinged to the nail pressing piece assembly through a hinged portion in the middle, the labor-saving lever is provided with a first end and a second end, the distance between the hinged portion and the first end is smaller than the distance between the hinged portion and the second end, and a first hinged shaft is arranged at the first end. The bracket is arranged on the base and positioned below the labor-saving lever, and the first hinge shaft is rotatably arranged on the bracket in a penetrating way. One end of the connecting rod is hinged to the upper cover, and the other end of the connecting rod is hinged to the second end. When the upper cover is pressed, the upper cover drives the labor-saving lever to rotate relative to the nail pressing piece assembly through the connecting rod, and the labor-saving lever rotates relative to the support through the first hinge shaft.
According to one embodiment of the disclosure, the position of the first end where the first hinge shaft is arranged is a first hinge position, the position of the second end where the second end is hinged to the connecting rod is a second hinge position, and the hinge position of the labor-saving lever is a third hinge position. Wherein the first hinge position, the second hinge position and the third hinge position are not on a straight path on the labor-saving lever.
According to one embodiment of the present disclosure, the third hinge position is farther from the rear end of the base than a line connecting the first hinge position and the second hinge position.
According to one embodiment of the disclosure, a hole groove is formed in a position, corresponding to the first end, of the support, the first hinge shaft is rotatably arranged in the hole groove in a penetrating mode, and a notch of the hole groove is formed in the rear end, back to the base, of the hole groove.
According to one embodiment of the present disclosure, the bracket has a guide structure adjacent to a front side of a notch of the hole groove. Wherein the guide structure is configured to guide the first hinge shaft to move into the bore groove after the first hinge shaft moves out of the bore groove.
According to one embodiment of the present disclosure, an orthographic projection pattern of the guide structure in the vertical direction is wedge-shaped or arc-shaped.
According to one embodiment of the present disclosure, the groove shape of the hole groove is a U shape.
According to one embodiment of the present disclosure, the labor saving assembly further comprises an elastic return. The elastic restoring piece is elastically connected between the second end and the upper cover. When the upper cover is pressed, the elastic restoring piece is configured to provide an elastic restoring force between the second end and the upper cover through self deformation, so that the upper cover and the labor-saving assembly are driven to restore to an initial state before pressing when the pressing force applied to the upper cover is reduced or disappears.
According to one embodiment of the present disclosure, the elastic restoring member is a spring, two ends of the spring are respectively provided with a connecting ring, and the two connecting rings are respectively rotatably connected to the second end and the upper cover.
According to one embodiment of the disclosure, the stapler comprises two groups of labor-saving assemblies, and the two groups of labor-saving assemblies are symmetrically arranged on the left side and the right side of the staple pressing assembly respectively.
According to the technical scheme, the stapler provided by the disclosure has the advantages and positive effects that:
the stapler that this disclosure provided includes laborsaving subassembly, and laborsaving subassembly includes laborsaving lever, support and connecting rod. The labor-saving lever is hinged with the nail pressing piece component by a hinged part at the middle part, and both ends of the labor-saving lever are respectively hinged with the bracket and the connecting rod, the bracket is arranged on the base, and the connecting rod is hinged with the upper cover. The distance between the position where the labor-saving lever is hinged to the connecting rod and the hinged part is larger than the distance between the position where the labor-saving lever is hinged to the support and the hinged part. One end of the labor-saving lever is provided with a hinge shaft, and the bracket is provided with a hole groove matched with the hinge shaft. Through the design, when the upper cover is pressed, the upper cover drives the labor-saving lever to rotate relative to the nail sheet pressing component through the connecting rod, so that the first hinge shaft moves into the hole groove, and the first end is rotatably connected to the support through the first hinge shaft. Therefore, the labor-saving effect of reducing the acting force required by the stapler to press can be realized by utilizing the design of the force arm difference of the upper side and the lower side of the hinged part of the labor-saving lever.
Drawings
Various objects, features and advantages of the present disclosure will become more apparent from the following detailed description of preferred embodiments thereof, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the disclosure and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:
FIG. 1 is a schematic illustration of a stapler according to an exemplary embodiment;
FIG. 2 is a schematic structural view of the stapler shown in FIG. 1 in another state;
fig. 3 is a schematic view of the respective moment arms of the portions of the stapler shown in fig. 1.
The reference numerals are explained below:
100. a base;
200. nailing channels;
300. a staple pressing assembly;
400. an upper cover;
510. a labor-saving lever;
511. a first end;
5111. a first hinge shaft;
512. a second end;
5121. a second hinge shaft;
513. a hinge portion;
5131. a third hinge shaft;
520. a support;
521. a hole groove;
522. a guide structure;
530. a connecting rod;
540. a spring;
a. a first hinge position;
b. a second hinge position;
c. a third hinged position;
L1a moment arm;
L2a moment arm;
L3a moment arm;
L4a moment arm;
L5a moment arm.
Detailed Description
Exemplary embodiments that embody features and advantages of the present disclosure are described in detail below in the specification. It is to be understood that the disclosure is capable of various modifications in various embodiments without departing from the scope of the disclosure, and that the description and drawings are to be taken as illustrative in nature, and not as restrictive.
In the following description of various exemplary embodiments of the disclosure, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the disclosure may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized, and structural and functional modifications may be made without departing from the scope of the present disclosure. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the disclosure, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples described in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of this disclosure.
Referring to fig. 1, a schematic view of the stapler of the present disclosure is representatively illustrated. In this exemplary embodiment, the stapler proposed by the present disclosure is explained taking a stapler applied to binding sheets of paper as an example. Those skilled in the art will readily appreciate that numerous modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of the present disclosure to other types of binding devices or other office supplies, and such changes are within the scope of the principles of the stapler as set forth in the present disclosure.
As shown in fig. 1, in the present embodiment, the present disclosure proposes a stapler mainly including a base 100, a staple path 200, a staple pressing blade assembly 300, an upper cover 400, and a labor saving assembly. Wherein, the nail path 200, the staple pressing member 300 and the upper cover 400 are respectively hinged to the rear end of the base 100. Referring to fig. 2 and 3 in combination, fig. 2 representatively illustrates a schematic view of another state of the stapler, which can embody principles of the present disclosure; a schematic diagram of the corresponding moment arms of portions of a stapler embodying principles of the present disclosure is representatively illustrated in fig. 3. The structure, connection mode and functional relationship of the main components of the stapler proposed by the present disclosure will be described in detail below with reference to the drawings.
As shown in fig. 1 and 2, in the present embodiment, the laborsaving assembly mainly includes a laborsaving lever 510, a bracket 520, and a link 530. Specifically, the economizer lever 510 is hinged to the cleat assembly 300 at a hinge point 513 in the middle (not in the center of the economizer lever 510). The labor-saving lever 510 has a first end 511 and a second end 512, and the first end 511 is provided with a first hinge shaft 5111. The distance between the hinge portion 513 and the first end 511 is smaller than the distance between the hinge portion 513 and the second end 512, that is, the labor-saving lever 510 uses the hinge portion 513 as the rotation axis of the cylinder rod, so that the arm of the labor-saving lever 510 at the first end 511 is smaller than the arm of the labor-saving lever at the second end 512. The bracket 520 is provided on the base 100 below the effort-saving lever 510, and the first hinge shaft 5111 is rotatably coupled to the bracket 520. The link 530 has one end hinged to the upper cover 400 and the other end hinged to the second end 512 of the effort-saving lever 510. Through the above design, when the upper cover 400 is pressed, the upper cover 400 drives the labor-saving lever 510 to rotate relative to the staple pressing assembly 300 through the connecting rod 530, and the first end 511 of the labor-saving lever 510 rotates relative to the bracket 520 through the first hinge shaft 5111. Accordingly, the labor-saving assembly provided by the present disclosure can achieve a labor-saving effect of reducing the acting force required for pressing the stapler by using the design of the force arm difference between the upper and lower sides of the hinge portion 513 of the labor-saving lever 510.
Preferably, as shown in fig. 3, in the present embodiment, the position of the first end 511 where the first hinge shaft 5111 is provided is defined as a first hinge position a, the position of the second end 512 where the link 530 is hinged is defined as a second hinge position b, and the hinge portion 513 of the labor-saving lever 510 is defined as a third hinge position c. On this basis, the positions of the first hinge position a, the second hinge position b and the third hinge position c on the labor-saving lever 510 may preferably fall on three vertexes of any triangle, i.e. the positions of the first hinge position a, the second hinge position b and the third hinge position c on the labor-saving lever 510 are not on the same straight path.
Further, as shown in fig. 1 to 3, based on the triangular arrangement of the first hinge position a, the second hinge position b and the third hinge position c on the labor-saving lever 510, in the present embodiment, the third hinge position c is farther from the rear end of the base 100 than the connecting line of the first hinge position a and the second hinge position b, that is, the hinge portion 513 of the labor-saving lever 510 hinged to the staple pressing member 300 is farther from the rear end of the base 100 than the connecting line of the first end 511 and the second end 512 of the labor-saving lever 510.
Preferably, as shown in fig. 1 and 2, in the present embodiment, a position of the bracket 520 corresponding to the first end 511 of the labor-saving lever 510 may preferably be opened with a hole 521, and a notch of the hole 521 of the bracket 520 may preferably be opened facing away from the rear end of the base 100. On this basis, when other operations are required, such as replacement of staples, the labor-saving lever 510 can be rotated relative to the staple holder assembly to move the first hinge shaft 5111 out of the opening of the slot 521, thereby enabling a greater opening of the upper cover 400.
Further, as shown in fig. 1 and 2, the bracket 520 may preferably have a guide structure 522 in the present embodiment based on the design that the notch of the hole groove 521 is opened toward the rear end of the base 100. The guide structure 522 is disposed adjacent to the front side of the notch of the aperture slot 521. When the first hinge shaft 5111 moves out of the hole groove 521 and the first hinge shaft 5111 needs to be installed in the open groove 521 again, the bracket 520 can provide a guide function to the first hinge shaft 5111 by using the guide structure 522 during the process that the first hinge shaft 5111 moves into the hole groove 521 from front to back.
Further, as shown in fig. 1 and 2, the orthographic projection pattern of the guide structure 522 in the vertical direction may preferably be wedge-shaped, based on the design of the bracket 520 having the guide mechanism. In other embodiments, the orthographic projection pattern of the guide structure 522 in the vertical direction may be another pattern such as an arc, and is not limited to this embodiment.
Further, as shown in fig. 1 and 2, the slot shape of the hole 521 may preferably be U-shaped in the present embodiment based on the design that the notch of the hole 521 is opened toward the rear end of the base 100. In other embodiments, the groove shape of the hole groove 521 may be selected as a C-shape or other groove shapes, and is not limited to this embodiment.
Preferably, as shown in fig. 1 and 2, in the present embodiment, the labor saving assembly may also preferably include an elastic restoring member. Specifically, the elastic restoring member is elastically connected between the second end 512 of the labor saving lever 510 and the upper cover 400. With the above-described design, when the upper cover 400 is pressed, the elastic restoring member can provide an elastic restoring force between the second end 512 of the labor saving lever 510 and the upper cover 400 by being deformed by itself (the extension of the spring 540 in this embodiment). Accordingly, when the pressing force applied to the upper cover 400 is reduced or disappears, the elastic restoring member can drive the upper cover 400 and the laborsaving assembly to restore to the initial state before the upper cover 400 is pressed.
Further, as shown in fig. 1 and 2, based on the design that the labor saving assembly includes an elastic restoring member, in the present embodiment, the elastic restoring member may preferably be a spring 540. On the basis, the two ends of the spring 540 respectively connected to the labor-saving lever 510 and the upper cover 400 may respectively have a connecting ring, and the two connecting rings are respectively rotatably connected to the second end 512 and the upper cover 400. For example, the connection location of the second end 512 of the power saving lever 510 and the spring 540 passes; a connection, such as a pin, connects one of the connection loops of the spring 540 to the power saving lever 510 and allows rotation of the connection loop relative to the power saving lever 510. Similarly, the connection position of the upper cover 400 and the spring 540 connects another connection ring of the spring 540 to the upper cover 400 through another connection member such as a pin, and can realize the rotation of the connection ring relative to the upper cover 400. Meanwhile, due to the design that the two ends of the spring 540 are respectively and rotatably connected to the labor-saving lever 510 and the upper cover 400 through the connecting rings, the spring 540 can always keep an optimal connection angle in the relative movement process of the labor-saving lever 510 and the upper cover 400, so that an optimal elastic recovery effect is provided. In other embodiments, the elastic restoring member may adopt other types, such as a spring sheet or a plate spring. In addition, the two ends of the elastic restoring member are not limited to be connected with the labor-saving lever 510 and the upper cover 400 respectively in a rotatable manner, and the embodiment is not limited thereto.
Preferably, in the present embodiment, the stapler proposed by the present disclosure may preferably include two sets of labor saving components. Specifically, the two sets of labor saving components may be disposed on the left and right sides of the staple pressing blade assembly 300, respectively, and the two sets of labor saving components are bilaterally symmetric with respect to the center line of the stapler. Through the design, the stress of all parts of the stapler in the working process can be more balanced. In other embodiments, the stapler provided by the present disclosure may also be provided with only one set of labor saving components, and is not limited to the embodiment.
Further, based on the design that the stapler includes two sets of labor-saving components, in the present embodiment, the two sets of labor-saving components may preferably share one first hinge shaft 5111. The first hinge shaft 5111 is hinged to both the labor-saving lever 510 and the staple pressing blade assembly 300.
It should be noted herein that the staplers illustrated in the drawings and described in this specification are but a few examples of the many types of staplers that could employ the principles of the present disclosure. It should be clearly understood that the principles of this disclosure are in no way limited to any of the details of the stapler or any of the components of the stapler as illustrated in the drawings or described in this specification.
For example, as shown in fig. 1 and 2, in the present embodiment, the second end 512 of the labor-saving lever 510 is provided with a second hinge shaft 5121, and the second end 512 of the labor-saving lever 510 is hinged to the connecting rod 530 through the second hinge shaft 5121. Similarly, the hinge portion 513 of the labor-saving lever 510 is provided with a third hinge axis 5131, and the middle portion of the labor-saving lever 510 is hinged to the staple pressing blade assembly 300 through the third hinge axis 5131. In other embodiments, the hinge connection between the second end 512 of the labor-saving lever 510 and the connecting rod 530 and the hinge connection between the middle portion of the labor-saving lever 510 and the staple pressing member 300 can be realized by other hinge structures, which is not limited to this embodiment.
Based on the above detailed description of the stapler proposed by the present disclosure, the force arms corresponding to the main components of the stapler proposed by the present disclosure are analyzed and explained below with reference to fig. 3.
As shown in fig. 3, when the upper cover 400 is pressed by an external force, the first lever structure (i.e., the lever structure formed by the front and rear ends of the upper cover 400 and the hinge position of the upper cover 400 and the link 530) comes into play. The upper cover 400 is forced to be pressed downward, and the hinge position of the link 530 and the upper cover 400 is forced to be pressed according to the lever principle (F)x·Lx＝Fy·L2) It can be known that the force applied to the hinged position of the connecting rod 530 and the upper cover 400 is small and the external force received by the upper cover 400 is small. Since the link 530 is subjected to the force transmitted from the upper cover 400, the link 530 is forced to be forced and transmits the force applied thereto to the hinge position (i.e., the second hinge position b) with the labor-saving lever 510, so that the hinge position of the link 530 with the labor-saving lever 510 is also forced. At this time, the second lever structure (i.e., the lever structure formed by the first end 511, the second end 512 and the hinge portion 513 of the labor-saving lever 510) starts to act. The long arm end (i.e., the second end 512) of the labor-saving lever 510 is hinged to the link 530, and the short arm end (i.e., the first end 511) of the labor-saving lever 510 is hinged to the bracket 520 by the first hinge shaft 5111 in cooperation with the hole 521, again according to the lever principle (F)x·Lx＝Fy·L2) It can be seen that the hinge position (the third hinge axis 5131) of the laborsaving lever 510 and the staple pressing member 300 is less stressed than the long-arm end of the laborsaving lever 510. Since the third hinge shaft 5131 is hinged to the staple pressing blade assembly 300, the staple pressing blade assembly 300 is pressed downward by a force, thereby performing a binding function of the stapler. Referring to fig. 3, a schematic diagram of the moment arm is shown: the first lever is the top cover 400 and the connecting rod 530, and the first lever defines the external force F applied to the top cover 4000The hinge position of the connecting rod 530 and the upper cover 400 is stressed by F1The long arm of the upper cover 400 (i.e., the portion between the front end of the upper cover 400 and the hinge position of the upper cover 400 and the link 530) is the arm L0The short arm of the upper cover 400 (i.e., the portion between the rear end of the upper cover 400 and the hinge position of the upper cover 400 and the link 530) is the arm L1According to the lever principle, the following steps are known:
F0·L0＝F1·L1
then there are: f1＝F0·L0/L1
After the hinge joint of the connecting rod 530 and the upper cover 400 is subjected to the force F1, the force F1 is transmitted to the hinge joint of the labor-saving lever 510 and the connecting rod 530 through the transmission function of the connecting rod 530, so that the force applied to the long arm end of the labor-saving lever 510 is also F1, the long arm of the labor-saving lever 510 is defined as a force arm L2, the short arm is defined as a force arm L3, and the lever principle indicates that:
F1·L2＝F2·L3
then there are: f2＝F1·L2/L3
And because the staple pressing assembly 300 is hinged to the labor-saving lever 510, the staple pressing assembly 300 forms the last lever, defining the staple pressing assembly 300 to be stressed as F3The long arm of the staple pressing member 300 (i.e., the portion between the front end of the staple pressing member 300 and the hinge position of the staple pressing member 300 and the power saving lever 510) is the arm L of force4The short arm (i.e., the portion between the rear end of the staple holder assembly 300 and the hinge position of the staple holder assembly 300 and the power saving lever 510) is the arm L of force5According to the lever principle, the following steps are known:
F3·L4＝F2·L5
then there are: f3＝F2·L5/L4＝F1·L2·L5/L3·L4＝F0·L0·L2·L5/L1·L3·L4
Based on the above derivation formula, the stress F of the top cover 400 can be obtained0Force F on the cleat assembly 3003Has a proportionality coefficient of L1·L3·L4/L0·L2·L5In light of the above-described design of the labor saving assembly of the stapler provided by the present disclosure, it can be seen that L1·L3·L4/L0·L2·L5Less than 1, i.e., the stapler of the present disclosure can achieve the labor saving effect of reducing the force required for the stapler to press.
Specifically, based on the above description, a specific embodiment of the stapler proposed in the present disclosure is taken as an example, wherein the force arms of the main components of the stapler can take the following values as examples: l is0＝113.2；L1＝27；L2＝22.5；L3＝8.6；L4＝102.5；L5If =40.2, the above values are respectively substituted into the above derivation formulas, and then: f1＝F0·L0/L1＝4.19·F0；F2＝F1·L2/L3＝2.6·F1；F3＝F2·L5/L4＝0.39·F2. Further, it is possible to obtain: f0＝0.235·F3. Therefore, in the specific embodiment of the present disclosure, the labor saving effect of the stapler provided by the present disclosure reaches about 76%, the pressing force required to be applied to the upper cover 400 by the user is greatly reduced, and the labor saving effect is significant.
In summary, the stapler provided by the present disclosure includes a labor-saving assembly including a labor-saving lever, a bracket, and a link. The labor-saving lever is hinged with the nail pressing sheet component by a hinge part at the middle part, and both ends of the labor-saving lever are respectively hinged with the bracket and the connecting rod, the bracket is arranged on the base, and the connecting rod is hinged with the upper cover. The distance between the position where the labor-saving lever is hinged to the connecting rod and the hinged part is larger than the distance between the position where the labor-saving lever is hinged to the support and the hinged part. One end of the labor-saving lever is provided with a hinge shaft, and the bracket is provided with a hole groove matched with the hinge shaft. Through the design, when the upper cover is pressed, the upper cover drives the labor-saving lever to rotate relative to the nail sheet pressing component through the connecting rod, so that the first hinge shaft moves into the hole groove, and the first end is rotatably connected to the support through the first hinge shaft. Therefore, the labor-saving effect of reducing the acting force required by the stapler to press can be realized by utilizing the design of the force arm difference of the upper side and the lower side of the hinged part of the labor-saving lever.
Exemplary embodiments of the stapler set forth in the present disclosure are described and/or illustrated in detail above. Embodiments of the disclosure are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or step of one embodiment can also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. described and/or illustrated herein, the articles "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and the description are used merely as labels, and are not numerical limitations of their objects.
While the stapler of the present disclosure has been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.

Claims (10)

1. The utility model provides a stapler, includes base, nail way, staple pressing piece subassembly and upper cover, the nail way, staple pressing piece subassembly and the upper cover articulate respectively in the rear end of base, its characterized in that, stapler still includes laborsaving subassembly, laborsaving subassembly includes:
the labor-saving lever is hinged to the nail pressing sheet assembly through a hinge part in the middle, the labor-saving lever is provided with a first end and a second end, the distance between the hinge part and the first end is smaller than the distance between the hinge part and the second end, and the first end is provided with a first hinge shaft;
the bracket is arranged on the base and positioned below the labor-saving lever, and the first hinge shaft can be rotatably arranged on the bracket in a penetrating way; and
one end of the connecting rod is hinged to the upper cover, and the other end of the connecting rod is hinged to the second end;
when the upper cover is pressed, the upper cover drives the labor-saving lever to rotate relative to the nail pressing piece assembly through the connecting rod, and the labor-saving lever rotates relative to the support through the first hinge shaft.
2. The stapler of claim 1, wherein the first end is hinged at a first hinge position, the second end is hinged at a second hinge position to the connecting rod, and the laborsaving lever is hinged at a third hinge position; wherein the first hinge position, the second hinge position and the third hinge position are not on a straight path on the labor-saving lever.
3. The stapler of claim 2, wherein the third hinge position is further from a rear end of the base than a line connecting the first hinge position and the second hinge position.
4. The stapler of claim 1, wherein the bracket defines a slot at a location corresponding to the first end, the first hinge shaft being rotatably disposed through the slot, a notch of the slot being defined at a rear end of the base opposite the first end.
5. The stapler of claim 4, wherein the bracket has a guide structure adjacent a front side of the slot opening of the slot; wherein the guide structure is configured to guide the first hinge shaft to move into the bore groove after the first hinge shaft moves out of the bore groove.
6. The stapler of claim 5, wherein an orthographic projection of the guide structure in the vertical direction is wedge-shaped or arc-shaped.
7. The stapler of claim 4, wherein the slot is U-shaped.
8. The stapler of claim 1, wherein the labor saving assembly further comprises:
the elastic restoring piece is elastically connected between the second end and the upper cover;
when the upper cover is pressed, the elastic restoring piece is configured to provide an elastic restoring force between the second end and the upper cover through self deformation, so that the upper cover and the labor-saving assembly are driven to restore to an initial state before pressing when the pressing force applied to the upper cover is reduced or disappears.
9. The stapler of claim 8, wherein the resilient return member is a spring having respective coupling loops at opposite ends thereof, the coupling loops rotatably coupled to the second end and the cover, respectively.
10. The stapler of any one of claims 1-9, wherein the stapler comprises two sets of the labor saving components, and the two sets of the labor saving components are symmetrically arranged on the left side and the right side of the staple pressing sheet component respectively.
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