How a Stapler Works?
A stapler is a machine or tool that binds pages or papers into volumes. The automation of book binding can be improved. The stapler has a simple structure and is generally only used for binding pages of small thickness, or for sealing paper bags and packaging bags. Everyone may have used a stapler, but do you know the structure of a stapler?
Introduction to the structure and principle of stapler
1. The structure of the stapler
However, this small tool is also a mechanical structure, and some staplers on the market also cleverly use a labor-saving mechanism, making it more convenient to staple books and easier to operate. Let's first have a general understanding of the structure of a general stapler. Ordinary stapler includes pusher, pin, support plate, deformer, rivet, shaper, base, spring, shrapnel, positioning shaft. Parts of the stapler The transmission structure has the function of automatically rebounding the pusher when the staples are loaded, and automatically makes the pusher work when the staples are loaded and the handle is closed, so as to withstand the staples.
2. Basic functions of stapler
According to the functional importance of the stapler, the functions of the stapler are divided into main functions, secondary functions and auxiliary functions. It mainly includes the needle loading function and the needle binding function, the secondary function includes the function of changing the shape of the needle head binding, and the auxiliary function includes the anti-slip and anti-noise functions. Each function can be divided into some sub-functions according to its implementation steps. Among them, the needle loading function can be divided into cover opening function, namely, end cap opening function, needle loading function, fixed needle function and cover closing function. Ejector function, automatic springback function and book closing function; the function of changing the needle binding shape can be divided into the function of ejecting the needle head mold, the function of changing the shape of the needle head mold, the function of returning the fixed needle head mold and the function of positioning the needle head mold; anti-slip and anti-noise functions; Trademark display function.
3. The working principle of the stapler
The working principle of the ordinary stapler is that when the end cap of the stapler is pressed by the hand, the top piece, the needle and the clamp will rotate around the connecting pin. At this time, the top will move up and down around the connecting pin, which is slightly larger than a needle height, the end cover spring is compressed, and the shrapnel is compressed, which will then drive the needle to move downward. After moving a certain distance, the needle will touch the need for binding After passing through the object, the needle will touch the mold, and the needle will bend, so as to achieve penetrating binding between the needle and the object; after the binding is completed, the person removes the needle end cap At this time, the shrapnel will rebound, and the needle, clamp, top and end cover will rise under the action of the elastic force, and then the rebound of the end cover spring will make the top and end cover rise again, and the top will be separated from the clamp. ; The expansion of the push spring causes the needle to advance again, thereby returning the stapler to its initial state, waiting for re-stapling.
4. Description of the connection method and characteristics between parts and parts
The connection methods between the parts mainly include the pin connection between the handle and the pallet, the welding of the handle and the deformer, the pin connection between the handle shrapnel and the pallet, the welding of the positioning shaft and the pallet, the welding of the positioning shaft and the thrust spring. , Welding of push spring and pusher, pin connection between pallet and base, rivet connection between deformer and base, interference fit between deformer and base, and interference fit between trademark and base.
Inspection focus of stapler and needle
The stapler uses a lever principle: the longer the handle is, the more forward it is, the more effort is saved when pressing; the larger the area where the stapler is pressed by hand, the larger the force-bearing surface, the more labor-saving nailing; the sharper the needle tip, the more labor-saving.
The shrapnel card in the upper cover of the middle support is placed in the correct position; if the shrapnel card is not placed in place, the shrapnel cannot be pressed to the front of the staple, resulting in insufficient punching force of the needle, resulting in floating needle or twisted needle. The guide spring has sufficient elasticity to close and open smoothly; the insufficient spring force will make the pusher not have enough force to push the staple forward in the second stitch, resulting in a stuck needle or an empty needle.
The guide rail is smooth and straight; when the guide rail is not smooth enough, the force exerted by the push load will not be enough to push the needle to slide forward in parallel, resulting in stuck needle or empty needle.
The needle groove is flat and smooth; the deformation of the needle groove will make the punched product unable to deform smoothly according to the set method, resulting in the pin valgus or the needle stuck.
Assemble the components to be firmly connected; when the assembly of the upper cover, the middle branch and the base is relatively loose, the contact position between the punched needle and the needle groove will change, and the staple cannot be deformed normally, resulting in a twisted needle.
