Labor-saving stapler

Abstract

The labor-saving stapler comprises an upper shell, an upper cover, a staple path, a base and a lower pressing wheel, the front portion of the upper shell is hinged to the front portion of the base, the upper cover is hinged to the staple path, the tail portion of the staple path is hinged to the tail portion of the base, the lower pressing wheel is hinged to the upper shell, and the lower pressing wheel is hinged to the upper shell. The lower pressing wheel is connected in a shaft hole of the upper shell through a rotating shaft, a shaft column is arranged on the inner side wall of the position of the shaft hole of the upper shell, the shaft column is provided with a reinforcing part with the outer diameter gradually increased, and in the rotating and pressing process of the upper shell, the rotating shaft is subjected to the counter-acting force of the lower pressing wheel, so that the lower pressing wheel is pressed. The reinforcing part is located in the direction of the counter-acting force of the rotating shaft. According to the labor-saving stapler, the strength of the side wall of the upper shell is enhanced by arranging the reinforcing part, the stress of the rotating shaft is effectively dispersed, the risks of cracks and deformation are reduced, the durability of the stapler is remarkably improved, and the service life of the stapler is remarkably prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of office stationery, and more particularly to a labor-saving stapler. Background Art

[0002] A Chinese utility model patent, granted as CN 216731672 U, discloses a handheld stapler comprising a base, a staple channel, an upper cover, and a machine lid. A lower pressure wheel is mounted below the cover, located above the front of the upper cover and in contact with its upper surface. The lower pressure wheel presses against the upper cover to move the machine lid. This utilizes a lever-like mechanism to apply pressure to the staple channel cover, combined with a lower pressure wheel-type pressing mechanism. This design not only saves effort but also provides smoother operation, prevents jamming, and allows the cover to easily rebound.

[0003] In the aforementioned patent solution, the lower pressure wheel is mounted on the plastic upper cover via a shaft. During repeated use of the stapler, the stress generated by the stapling action will be concentrated at the contact point between the shaft and the upper cover. As the number of uses increases, the material structure of this part will gradually be damaged. For example, cracks and deformations may appear at the upper cover where the shaft is installed, which in turn affects the normal operation of the entire stapler and ultimately shortens the service life of the stapler. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art to a certain extent. To this end, the present invention proposes a labor-saving stapler that, by providing a reinforcement portion to enhance the strength of the upper shell side wall, effectively disperses the stress of the rotating shaft, reduces the risk of cracks and deformation, and significantly improves the durability and service life of the stapler.

[0005] The technical solution adopted by the present utility model is: to provide a labor-saving stapler, including an upper shell, an upper cover, a nail channel, a base and a lower pressure wheel, the front part of the upper shell is hinged to the front part of the base, the upper cover is hinged to the nail channel, the tail part of the nail channel is hinged to the tail part of the base, the lower pressure wheel is hinged to the upper shell, the lower pressure wheel is connected to the axial hole of the upper shell through a rotating shaft, the inner side wall of the axial hole position of the upper shell is provided with a shaft column, wherein the shaft column has a reinforcement part with an outer diameter gradually increasing, and in the process of the upper shell rotating and pressing down, the rotating shaft is subjected to the reaction force of the lower pressure wheel, and the reinforcement part is located in the direction of the reaction force of the rotating shaft.

[0006] With this structure, the reinforcements increase the structural strength of the upper shell sidewalls, effectively dispersing the stress on the shaft and improving the stapler's durability. As the upper shell rotates and presses downward, the reaction force of the shaft is absorbed by the reinforcements, significantly reducing the risk of cracks and deformation in the upper cover at the shaft mounting point, thereby extending the stapler's service life.

[0007] According to one embodiment of the present invention, the shaft hole of the upper shell includes a first shaft hole, and one or both sides of the upper shell are provided with a through-hole-shaped first shaft hole. The rotating shaft passes through the first shaft hole to install the lower pressure wheel, so that the rotating shaft can be flexibly installed and removed, making the replacement and maintenance of the lower pressure wheel more convenient. At the same time, the through-hole structure effectively reduces the material usage of the upper shell, improves the overall lightweight design, and helps reduce the manufacturing cost of the product.

[0008] According to one embodiment of the present invention, a decorative shell is detachably connected to one or both sides of the upper shell, and the decorative shell covers the first shaft hole; the decorative shell not only has an aesthetically pleasing appearance, but also is effectively dustproof, preventing dust and debris from entering the first shaft hole, thereby protecting the internal mechanical structure and extending the service life.

[0009] According to an embodiment of the present invention, the upper shell is provided with a connection hole for connecting to the decorative shell.

[0010] According to one embodiment of the present invention, the upper housing's shaft hole also includes a second shaft hole, spaced apart from the first shaft hole. The second shaft hole serves as a backup mounting structure for the rotating shaft. This design takes into account the possibility of wear or damage to the rotating shaft after prolonged use and provides a convenient replacement solution. If the user discovers a shaft failure in the first shaft hole, they can switch to the second shaft hole, ensuring continued use of the stapler.

[0011] According to an embodiment of the present invention, the inner side wall of the upper shell is provided with a reinforcing rib, and the reinforcing rib is connected to the reinforcing portion.

[0012] According to one embodiment of the present invention, the base comprises a plastic base and a metal base, with the upper cover and the staple channel both hingedly connected to the plastic base. The hinged design of the plastic base allows for smooth opening and closing of the upper cover and staple channel during operation, reducing friction and improving the user experience. Furthermore, the plastic base is lightweight, making it easy to carry and move, making it particularly suitable for users who frequently change their work positions. Combined with the metal base, this not only enhances the base's structural strength but also provides greater functional versatility for the entire stapler.

[0013] According to one embodiment of the present invention, the upper cover is provided with a guide rib, and the lower pressure wheel is provided with a circle of annular grooves corresponding to the position of the guide ribs. The cross-section of the annular groove is trapezoidal, and the two sides of the guide ribs maintain close contact with the two side walls of the annular groove. This design effectively ensures the stability and guidance of the lower pressure wheel during movement, allowing the lower pressure wheel to move smoothly along a predetermined trajectory, reducing the deviation phenomenon that may occur during operation. Due to the trapezoidal cross-section of the annular groove, it can better adapt to the shape of the lower pressure wheel, making the contact surface more stable, and further reducing the jamming caused by friction.

[0014] According to one embodiment of the present invention, a protrusion is provided at the tail end of the guide rib; when the stapler is pressed down to the lowest position of the stroke, the lower pressure wheel rotates, and its annular groove rolls along the guide rib until the protrusion abuts against the bottom of the groove of the lower pressure wheel to form tactile feedback.

[0015] According to an embodiment of the present invention, a circle of soft rubber is provided at the bottom of the annular groove; when the protrusion contacts the soft rubber at the bottom of the annular groove, the tactile feedback of the stapler is obviously different. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a three-dimensional diagram of the stapler in the embodiment of the present utility model.

[0018] Figure 2 It is a cross-sectional view of the stapler in the embodiment of the present utility model.

[0019] Figure 3 It is an exploded view of the stapler in the embodiment of the present utility model.

[0020] Figure 4 for Figure 3 A partial enlarged view of point A in the middle.

[0021] Figure 5 It is a three-dimensional diagram of the upper shell and the lower pressure wheel in the embodiment of the present utility model.

[0022] Figure 6 It is a structural schematic diagram of the upper shell in an embodiment of the present utility model.

[0023] Figure 7 It is a cross-sectional view of the upper shell in the embodiment of the present utility model.

[0024] Figure 8 It is a partial structural diagram of the upper shell in the embodiment of the utility model.

[0025] Description of the numbers in the figure:

[0026] 1. Upper shell; 2. Upper cover; 3. Nail channel; 4. Base; 5. Lower pressure wheel; 6. Rotating shaft;

[0027] 11. Decorative shell; 12. First axial hole; 13. Axis column; 14. Reinforcement rib; 15. Connecting hole; 16. Second axial hole;

[0028] 13a, reinforcement part;

[0029] 21. Guide rib; 22. Protrusion;

[0030] 41. Plastic seat; 42. Metal seat;

[0031] 51. Annular groove. DETAILED DESCRIPTION

[0032] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention. Example

[0033] like Figure 1-8 As shown, in this embodiment, a labor-saving stapler is disclosed, including an upper shell 1, an upper cover 2, a nail channel 3, a base 4 and a lower pressure wheel 5, the front part of the upper shell 1 is hinged to the front part of the base 4, the upper cover 2 is hinged to the nail channel 3, the tail part of the nail channel 3 is hinged to the tail part of the base 4, the lower pressure wheel 5 is hinged to the upper shell 1, and the lower pressure wheel 5 is connected to the axial hole of the upper shell 1 through a rotating shaft 6, and the inner side wall of the axial hole position of the upper shell 1 is provided with a shaft column 13, wherein the shaft column 13 has a reinforcing portion 13a with a gradually increasing outer diameter, and in the process of the upper shell 1 rotating and pressing down, the rotating shaft 6 is subjected to the reaction force of the lower pressure wheel 5, and the reinforcing portion 13a is located in the direction of the reaction force of the rotating shaft 6.

[0034] Furthermore, in this embodiment, the upper shell 1 has a top wall and two side walls, each of which is provided with a first axial hole 12. The first axial hole 12 is a through-hole and extends through the inner and outer sides of the side walls of the upper shell 1. The central axis of the lower pressure wheel 5 is connected to the rotating shaft 6, and both ends of the rotating shaft 6 are rotatably engaged with the first axial hole 12.

[0035] Furthermore, the base 4 includes a plastic seat 41 and a metal seat 42. The upper cover 2 and the nail channel 3 are both hinged to the plastic seat 41, and the metal seat 42 is fixedly connected to the plastic seat 41. The front of the upper shell 1 is hinged to the front of the metal seat 42, and the rear end of the upper cover 2 and the rear end of the nail channel 3 are both hinged to the plastic seat 41 via the same axis. At the rear end of the nail channel 3, the upper cover 2 is elastically connected to the upper shell 1.

[0036] Further, combined with Figure 8 As shown, in this embodiment, the shaft column 13 is formed by the protrusion 22 on the inner wall of the upper shell 1, and its inner hole is adapted to the rotating shaft 6. A part of the outer diameter is circular, and the remaining part is spiral, resulting in a gradual increase in the wall thickness of the shaft column 13 in this part.

[0037] Specifically, combined Figure 5-6 As shown, in this embodiment, a decorative shell 11 is detachably connected to one or both sides of the upper shell 1, and the decorative shell 11 covers the first shaft hole 12. The upper shell 1 is provided with a connecting hole 15 for connecting the decorative shell 11.

[0038] Furthermore, in this embodiment, the decorative shell 11 has a connecting column adapted to the connecting hole 15 , and the connecting column is snap-fitted with the connecting hole 15 .

[0039] Specifically, combined Figure 7-8 As shown, the axial hole of the upper shell 1 also includes a second axial hole 16, and the second axial hole 16 is spaced apart from the first axial hole 12. The inner wall of the upper shell 1 is provided with a reinforcing rib 14, and the reinforcing rib 14 is connected to the reinforcing portion 13a. The upper cover 2 is provided with a guide rib 21, and the lower pressure wheel 5 is provided with a circle of annular groove 51 corresponding to the position of the guide rib 21. The cross-section of the annular groove 51 is trapezoidal, and the two sides of the guide rib 21 are in close contact with the two side walls of the annular groove 51. A protrusion 22 is provided at the tail end of the guide rib 21, and a circle of soft rubber is provided at the bottom of the annular groove 51; when the protrusion 22 contacts the soft rubber at the bottom of the annular groove 51, the tactile feedback of the stapler is significantly different.

[0040] Furthermore, in this embodiment, the working principle of the stapler is as follows:

[0041] First, the user presses the upper shell 1 downward, causing the upper shell 1 to move downward, so that the lower pressure wheel 5 is in close contact with the upper cover 2. Subsequently, the upper shell 1 drives the upper cover 2 and the nail channel 3 to move downward as a whole, and the annular groove 51 on the lower pressure wheel 5 rolls along the guide rib 21. The trapezoidal cross-section design of the guide rib 21 ensures that the inclined surfaces on both sides thereof are in close contact with the annular groove 51, providing stable guidance. The lower pressure wheel 5 pushes the upper cover 2 downward, and the reaction force of the lower pressure wheel 5 on the rotating shaft 6 is vertically upward. The reinforcement portion 13a is always located on the upper side of the rotating shaft 6 during the rotation of the upper shell 1. The reinforcement portions 13a on the side walls on both sides of the upper shell 1 are mirror images of each other, that is, the reinforcement portion 13a on the side wall of one side of the upper shell 1 gradually increases in the wall thickness of the shaft column 13 in the clockwise direction, and the wall thickness of the shaft column 13 on the side wall of the other side gradually increases in the counterclockwise direction.

[0042] Finally, the front end of the stapling track 3 is pressed against the paper to be stapled. The user continues to apply pressure, further pressing the upper shell 1 downward, and the lower pressure wheel 5 drives the upper cover 2 downward relative to the stapling track 3, thus completing the stapling action. At this time, the protrusion 22 on the guide rib 21 contacts the soft rubber at the bottom of the annular groove 51, providing a damped tactile feedback.

[0043] The whole process combines the lever principle and guide design, making the operation smoother and more labor-saving.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0046] In the description of this specification, the reference terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0047] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A labor-saving stapler, characterized in that: It includes an upper shell, an upper cover, a nail channel, a base and a lower pressure wheel, the front part of the upper shell is hinged to the front part of the base, the upper cover is hinged to the nail channel, the tail part of the nail channel is hinged to the tail part of the base, the lower pressure wheel is hinged to the upper shell, and the lower pressure wheel is connected to the axial hole of the upper shell through a rotating shaft, and the inner side wall of the axial hole position of the upper shell is provided with a shaft column, wherein the shaft column has a reinforcement part with an outer diameter gradually increasing, and in the process of the upper shell rotating and pressing down, the rotating shaft is subjected to the reaction force of the lower pressure wheel, and the reinforcement part is located in the direction of the reaction force of the rotating shaft.

2. The labor-saving stapler according to claim 1, characterized in that: The axial hole of the upper shell includes a first axial hole, and one side or both sides of the upper shell are provided with a through-hole-shaped first axial hole.

3. The labor-saving stapler according to claim 2, characterized in that: One side or both sides of the upper shell are detachably connected to a decorative shell, and the decorative shell covers the first shaft hole.

4. The labor-saving stapler according to claim 3, characterized in that: The upper shell is provided with a connection hole for connecting with the decorative shell.

5. The labor-saving stapler according to claim 2, characterized in that: The axial hole of the upper shell further includes a second axial hole, and the second axial hole is spaced apart from the first axial hole.

6. The labor-saving stapler according to claim 1, characterized in that: The inner side wall of the upper shell is provided with a reinforcing rib, and the reinforcing rib is connected to the reinforcing portion.

7. The labor-saving stapler according to claim 1, characterized in that: The base comprises a plastic base and a metal base, and the upper cover and the nail channel are both hinged to the plastic base.

8. A labor-saving stapler according to any one of claims 1 to 7, characterized in that: The upper cover is provided with a guide rib, and the lower pressing wheel is provided with a circle of annular grooves corresponding to the position of the guide ribs. The cross section of the annular groove is trapezoidal, and both sides of the guide ribs maintain close contact with the two side walls of the annular groove.

9. The labor-saving stapler according to claim 8, characterized in that: The tail end of the guide rib is provided with a protrusion.

10. The labor-saving stapler according to claim 9, characterized in that: A circle of soft rubber is provided at the bottom of the annular groove.

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