CN102335903B - Labor-saving stapler - Google Patents

Abstract

The invention provides a labor-saving stapler and belongs to the technical field of office supplies. It solves the problem of poor labor-saving effect of the existing stapler. The labor-saving stapler includes a base, a nail pressing plate, an upper cover, and a staple box between the base and the nail pressing plate for placing staples. The tail end of the upper cover is hinged by the rear pin, and an auxiliary upper cover is also provided between the upper cover and the base. There is a pressing structure 1 that can make the upper end move to the tail of the upper cover and press down when a downward force is applied to the upper cover. The middle part of the auxiliary upper cover is provided with a nail that can make the pressing nail The second pressing structure that the plate is pressed down together with the auxiliary upper cover. The invention has the advantages of good labor-saving effect and the like.

Description

labor saving stapler

technical field

The invention belongs to the technical field of office supplies, and relates to a stapler, in particular to a labor-saving stapler.

Background technique

The stapler is a commonly used office product. The common stapler structure includes a base, a staple box hinged on the base, and a cover. , after the staples in the staple box are pressed down and penetrate the paper through the staple pressing sheet on the cover, the staples are folded inward or outward through the folding foot plate.

For the convenience of portability and use, the length of the general stapler will not be very large, so the force arm generated when using the downward pressure is limited, especially when binding more papers, it takes a lot of effort to complete, sometimes even Unable to complete stapling. Especially for the elderly, children or women with little strength, it will cause great inconvenience. Long-term use of this labor-saving stapler will cause pain in fingers and palms, which will affect health and work efficiency.

For existing problems, people have designed various labor-saving staplers, and some have applied for patents. For example, Chinese patent literature discloses a labor-saving stapler [application number: 200620013017.1; authorization announcement number: CN2902712Y ], which includes a base, a staple box assembly, a pressing bar assembly and a labor-saving bar assembly; the base includes a fixed frame; the staple box assembly is pivotally mounted on the base, and includes a staple box, the rear end of the staple box is pivoted on the fixed frame, the pressure rod assembly is pivoted on the fixed frame; the labor-saving rod assembly is pivoted on the pressure rod assembly and the base, and includes a labor-saving rod and a connecting rod. The rear end of the labor-saving rod is pivotally arranged on the fixed frame and is located above the rear end of the staple case and the rear end of the pressure rod. The front end of the connecting rod is pivotally arranged on the pressure rod, and the rear end is pivotally arranged on the labor-saving rod.

The above-mentioned patent achieves a certain labor-saving effect through a series of lever principles, but the labor-saving effect is still not obvious enough in use, especially when the upper cover is pressed down, the lengths of the resistance arm and the power arm do not change. In the process, the user has to maintain a large force all the time to complete the binding.

Contents of the invention

The object of the present invention is to provide a labor-saving stapler with good labor-saving effect for the above-mentioned problems existing in the prior art.

The object of the present invention can be achieved through the following technical solutions: a labor-saving stapler, comprising a base, a nail pressing plate, an upper cover and a staple box for placing staples between the base and the nail pressing plate, the upper The tail of the cover, the tail of the nail plate, and the tail of the box are all hinged with the tail of the base through the rear pin. It is characterized in that an auxiliary upper cover is also provided between the upper cover and the base. The auxiliary The lower end of the upper cover is hinged at the front end of the base, the upper end of the auxiliary upper cover is close to the tail of the upper cover, and there is a device between the upper end and the upper cover that can move the upper end to the upper cover when a downward force is applied to the upper cover. And press down structure one, the middle part of described auxiliary loam cake is provided with when auxiliary loam cake presses down and can make nail plate press down together with auxiliary loam cake.

This labor-saving stapler adds an auxiliary upper cover, which exerts a downward force on the upper cover during stapling. The force uses the first pressing structure to make the upper end of the auxiliary upper cover move to the tail of the upper cover and press down, and the second pressing structure makes the pressure The nail plate is pressed down together with the auxiliary top cover to complete the binding.

This labor-saving stapler realizes labor-saving operation through the first pressing structure and the second pressing structure, and the double-lever principle realizes labor-saving operation, and the labor-saving effect is good; moreover, during the stapling process, the upper end of the auxiliary upper cover will move to the tail of the upper cover, so that the resistance arm is continuously reduced , while the power arm remains unchanged, the binding process will become more and more labor-saving, and will not cause fatigue damage to the user's hand.

In the labor-saving stapler described above, the pressing structure includes a first drive pin and a long strip-shaped first chute on the upper cover, and the first drive pin passes through the upper end of the auxiliary upper cover And located in the first chute. When a downward force is applied to the upper cover, the first transmission pin slides in the first chute towards the tail of the upper cover, because the first transmission pin passes through the upper end of the auxiliary upper cover, so the first transmission pin drives the auxiliary upper cover The upper end of the cover moves together to the tail of the upper cover. The first chute also has a guiding function, so that the first transmission pin can only move in the first chute, and the first transmission pin will not be misplaced when moving.

In the above labor-saving stapler, the first transmission pin sleeve is provided with a roller located between the two sides of the auxiliary upper cover, and the circumferential surface of the roller is against the inner bottom surface of the upper cover. The roller plays the role of transmitting the force. When the roller is subjected to the force, the circumferential surface of the roller fits the inner bottom surface of the upper cover, and rotates with the first transmission pin as the axis, driving the first transmission pin to slide smoothly on the first slide. The movement in the groove has good process stability, and the wear of the inner bottom surface of the upper cover and the first transmission pin is also reduced in this way to ensure the service life of the first transmission pin.

As another situation, in the above-mentioned labor-saving stapler, the pressing structure includes an inclined pressing surface of the upper cover and a first transmission pin passing through the auxiliary upper cover, and the first transmission pin Against the inclined pressing surface. When a downward force is applied to the upper cover, the first transmission pin slides along the inclined downward pressure surface in the direction of the tail of the upper cover, because the first transmission pin passes through the upper end of the auxiliary upper cover, so the first transmission pin drives the auxiliary upper cover The upper end of the cover moves together to the tail of the upper cover.

In the labor-saving stapler described above, the second pressing structure includes a second transmission pin and a second sliding slot in the middle of the auxiliary upper cover, and the second transmission pin passes through the nail pressure plate and is located on the second sliding slot. in the slot. When the auxiliary upper cover is pressed down, the position of the second chute changes, so that the second transmission pin passively moves in the second chute, because the second transmission pin passes through the nail pressing plate, so the nail pressing plate will follow the second transmission pin The pin moves and presses down. The second chute has a guiding function, so that the second transmission pin can only move in the second chute, and the second transmission pin will not be misaligned when moving.

In the above labor-saving stapler, both sides of the nail presser plate have lugs protruding from the top surface of the nail presser plate, and the second transmission pin passes through the lugs to be hinged with the nail presser plate . The arrangement of the lug facilitates the hinged installation of the second transmission pin.

In the labor-saving stapler described above, a compression spring is fixed between the nail presser plate and the staple box, one end of the compression spring is against the nail presser plate, and the other end of the compression spring is against the staple box. After the binding is completed, the user removes the active force on the upper cover, and the clip spring provides elastic force to reset the position of the nail pressing plate, so as to prepare for the next nail pressing of the nail pressing plate.

In the labor-saving stapler described above, the rear pin sleeve is provided with a torsion spring and a needle groove hook piece, one end of the torsion spring acts on the needle groove hook piece, and the other end acts on the base. After the staples in the binding box are used up, the needle groove hook piece is pressed by hand, and the nail track in the binding box is released and ejected. When the hand is released, the needle groove hook piece is reset under the action of the torsion spring. After the staples are loaded, the inner nail track is pushed back into the binding box, and now the needle groove hook piece will always firmly position the inner nail track in the binding box under the action of the torsion spring.

In the labor-saving stapler described above, a base spring is fixed between the base and the staple box, one end of the base spring leans against the staple box, and the other end of the base spring leans against the base. After the binding is completed, the user removes the force on the upper cover, and the base spring provides elastic force to reset the binding box, which is the best preparation for the next binding.

In the labor-saving stapler described above, the staple box is provided with a staple pushing assembly capable of pushing the staples in the box towards the front end all the time. The staple pushing assembly is arranged in the staple box, and its purpose is to push the staple forward so that there is always a staple in the staple path.

Compared with the prior art, this labor-saving stapler adds an auxiliary upper cover, and through the first pressing structure and the second pressing structure, the labor-saving operation is realized with the principle of double levers, and the labor-saving effect is good, and in the binding process, the auxiliary upper cover The upper end of the cover will move to the tail of the upper cover, so that the resistance arm is continuously reduced, while the power arm remains unchanged, the binding process will become more and more labor-saving, easy to bind, good in operability, and will not cause fatigue damage to the user's hand .

Description of drawings

Fig. 1 is a schematic diagram of the front view of the labor-saving stapler under normal conditions.

Fig. 2 is a front structural schematic view of the labor-saving stapler in working state.

Fig. 3 is a structural sectional view of the labor-saving stapler.

Fig. 4 is a schematic diagram of an exploded structure of the labor-saving stapler.

Fig. 5 is a force analysis diagram of the labor-saving stapler.

Fig. 6 is another structural schematic diagram of the labor-saving stapler.

In the figure, 1. base; 2. nail plate; 2a, lug; 3. upper cover; 4. box; 5. rear pin; 6. auxiliary upper cover; 7. first chute; 8. first Transmission pin; 9, roller; 10, inclined pressing surface; 11, second chute; 12, second transmission pin; 13, torsion spring; 14, compression spring; 15, base spring; 16, needle groove hook piece.

Detailed ways

The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

Example 1

As shown in Fig. 1, Fig. 3 and Fig. 4, the labor-saving stapler includes a base 1, a nail pressing plate 2, a staple box 4 and an upper cover 3 for placing staples between the base 1 and the nail pressing plate 2, The staple box 4 is provided with a push nail assembly that can push the staples in the staple box 4 to the front end all the time. Rear pin 5 is hinged, and auxiliary loam cake 6 is also provided between loam cake 3 and base 1, and the lower end of auxiliary loam cake 6 is hinged at the front end place of base 1, and the upper end of auxiliary loam cake 6 is close to the afterbody of loam cake 3 and this Between the upper end and the upper cover 3, there is a pressing structure 1 that can move the upper end to the tail of the upper cover 3 and press down when a downward force is applied to the upper cover 3. In this embodiment, the pressing structure 1 includes the upper cover. 3 has a first chute 7 and a first transmission pin 8, the first transmission pin 8 passes through the upper end of the auxiliary upper cover 6 and is located in the first chute 7, and the end of the first transmission pin 8 passes through the E-shaped snap ring fixed. The middle part of the auxiliary upper cover 6 is provided with a second pressing structure that can make the nail plate 2 press down together with the auxiliary upper cover 6 when the auxiliary upper cover 6 is pressed down. In this embodiment, the second pressing structure includes a second transmission pin 12 And the second chute 11 in the middle of the auxiliary upper cover 6, the second transmission pin 12 passes through the nail plate 2 and is located in the second chute 11; of course, according to the actual situation, the second pressing structure can also pass through the nail The second transmission pin 12 of the plate 2 and the lower pressing surface in the middle of the auxiliary upper cover 6, when the auxiliary upper cover 6 is pressed down, the lower pressing surface in the middle of the auxiliary upper cover 6 directly presses on the second transmission pin 12, so that the first Two driving pins 12 drive the nail plate 2 to press down together.

As shown in Figure 3, in order to ensure the service life of the first transmission pin 8 and the stability of the transmission process, the first transmission pin 8 is provided with a roller 9 between the two sides of the auxiliary upper cover 6, and the circumference of the roller 9 The surface is against the inner bottom surface of the upper cover 3. In order to make the nail-pressing plate 2 reset automatically after the binding is completed, a stage clip 14 is fixed between the nail-pressing plate 2 and the binding box 4, one end of the stage clip 14 leans against the nail-pressing plate 2, and the other end of the stage clip 14 rests against the nail-pressing plate 2. Lean against the box 4; 5 sets of rear pins are provided with a torsion spring 13 and a needle groove hook piece 16, one end of the torsion spring 13 acts on the needle groove hook piece 16, and the other end acts on the base 1, and there is still a gap between the base 1 and the box 4 A base spring 15 is fixed, one end of the base spring 15 leans against the binding box 4 , and the other end of the base spring 15 leans against the base 1 . As shown in Figure 4, in order to facilitate the hinged installation of the second drive pin 12, both sides of the nail press plate 2 have lugs 2a protruding from the top surface of the nail press plate 2, and the second drive pin 12 passes through the lugs 2a. The ear 2a is hinged to the nail plate 2, and the end of the second transmission pin 12 is fixed by an E-shaped snap ring.

This labor-saving stapler adds an auxiliary upper cover 6, and when binding, the upper cover 3 is pressed down, and the first transmission pin 8 slides in the first chute 7 towards the tail of the upper cover 3, because the first transmission pin 8 Pass through the upper end of the auxiliary upper cover 6, so the first transmission pin 8 drives the upper end of the auxiliary upper cover 6 to move to the tail of the upper cover 3 together, and the auxiliary upper cover 6 is pressed down. At this time, the position of the second chute 11 changes, so that the second The driving pin 12 passively moves downward in the second chute 11, because the second driving pin 12 passes through the nail pressing plate 2, so the nail pressing plate 2 will be pressed down with the action of the second driving pin 12, and then the binding work is completed , the position of the first transmission pin 8 in the first chute 7 and the position of the second transmission pin 12 in the second chute 11 after binding are shown in FIG. 2 .

Because in the binding process, the upper end of the auxiliary upper cover 6 will move to the tail of the upper cover 3, so that the resistance arm is continuously reduced, while the power arm remains unchanged, the binding process will become more and more labor-saving, and the user's hands will not be damaged. suffered fatigue damage. The specific principle is as shown in Figure 5. When the binding is established, the force applied to the upper cover 3 is F, the force at the first drive pin 8 is F1, the force at the second drive pin 12 is F2, and the nail is pressed. The front end force of the plate 2 is F3, the hinge point between the upper cover 3 and the base 1 is B0, the hinge point between the nail plate 2 and the base 1 is B1, and the hinge point between the lower end of the auxiliary upper cover 6 and the base 1 is B2, the initial state , the ratio of the distance from the application point of the force F at the front end of the upper cover 3 to B0 to the distance from the first drive pin 8 to B0 in this embodiment is 2.7:1, so the downward pressure applied to the upper cover 3 during binding is 2.7:1. When the force F transmits the force to the first transmission pin 8 via the principle of leverage, a force F1 of 2.7 parts is formed at the first transmission pin 8; for the auxiliary upper cover 6, the distance from the first transmission pin 8 to B2 is the same as The ratio of the distance between the second transmission pin 12 and B2 is 2.8:1. When the force F1 exerted by the first transmission pin 8 on the auxiliary upper cover 6 is transmitted to the second transmission pin 12 through the principle of leverage, the second transmission The pin 12 forms an active force F2 that is enlarged to 2.8 parts; for the nail plate 2, the distance from the front end of the nail plate 2 to B1 is 1.6:1 to the distance from the second drive pin 12 to B1, so F2 passes through The force generated when the force is transmitted to the front end of the nail plate 2 by the principle of leverage is the force F3 which is reduced by 0.625, and its calculation formula is as follows: F*2.7=F1*1, and F1=2.7F; F1* 2.8=F2*1, get F1=0.36F2; F2*1=F3*1.6, get F3=0.625F2; F3/F1=(0.625/0.36)F2, get F3=1.7F1, F3=1.7*2.7F =4.6F, initially, the front end of the nail plate 2 is subjected to the force exerted by the user whose portion is enlarged by 4.6. As shown in Figure 2, the positions of the first drive pin 8 and the second drive pin 12 have changed after binding, and the distance from the application point of the force F of the front end of the upper cover 3 to B0 is the same as that of the first drive pin 8 to B0. The ratio of the distance is 3.5:1, so when the downward force F applied to the upper cover 3 is transmitted to the first transmission pin 8 through the principle of leverage during binding, the first transmission pin 8 forms a 3.5 part Force F1; for the auxiliary upper cover 6, the ratio of the distance from the first transmission pin 8 to B2 to the distance from the second transmission pin 12 to B2 is 3.7:1, and the first transmission pin 8 is applied to the auxiliary upper cover 6 during binding. When the force F1 transmits the force to the second drive pin 12 via the principle of leverage, the second drive pin 12 forms an force F2 that is enlarged to 3.7 parts; for the nail plate 2, the front end of the nail plate 2 reaches B1 The ratio of the distance between the second drive pin 12 and the distance from B1 is 1.6:1, so the force generated when F2 transmits the force to the front end of the nail plate 2 through the principle of leverage is the force F3 that is reduced by 0.625, and its calculation The formula is as follows: F*3.5=F1*1, get F1=3.5F; F1*3.7=F2*1, get F1=0.27F2; F2*1=F3*1.6, get F3=0.625F2; F3/ F1=(0.625/0.27)F2, get F3=2.3F1, F3=2.3*3.5F=8.0F, so finally, the front end of the nail plate 2 is subjected to the force exerted by the user who has enlarged 8 parts. Of course, according to the actual situation, the above ratio can be adjusted to save more effort. Therefore, this labor-saving stapler exerts a downward force on the upper cover 3 to produce a binding force of 4.6 to 8 parts through the principle of leverage. The labor-saving effect is good, and the resistance arm is reduced during the binding process. Operability is good.

Example 2

As shown in Figure 6, the structure and principle of this embodiment are basically the same as that of Embodiment 1. The difference lies in the pressing structure in this embodiment—including the inclined pressing surface 10 of the upper cover 3 and passing through the auxiliary upper pressing structure. The first transmission pin 8 of the cover 6 abuts against the inclined pressing surface 10 . When applying the force of pressing down on the upper cover 3, the first transmission pin 8 slides in the direction of the tail of the upper cover 3 along the inclined pressing surface 10, because the first transmission pin 8 passes through the upper end of the auxiliary upper cover 6, so the first The transmission pin 8 drives the upper end of the auxiliary upper cover 6 to move to the tail of the upper cover 3 together.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Although the base 1, the nail plate 2, the lug 2a, the upper cover 3, the staple box 4, the rear pin 5, the auxiliary upper cover 6, the first chute 7, the first transmission pin 8, and the roller 9 are frequently used in this paper. , Inclined pressing surface 10, second chute 11, second drive pin 12, torsion spring 13, compression spring 14, base spring 15, needle groove hook piece 16 and other terms, but the possibility of using other terms is not excluded. These terms are used only for the purpose of describing and explaining the essence of the present invention more conveniently; interpreting them as any kind of additional limitation is against the spirit of the present invention.

Claims (6)

1. A labor-saving stapler, comprising a base (1), a nail pressing plate (2), an upper cover (3) and a staple box for placing staples between the base (1) and the nail pressing plate (2) (4), the tail of the upper cover (3), the tail of the nail plate (2), and the tail of the box (4) are all hinged to the tail of the base (1) through the rear pin (5). It is characterized in that an auxiliary upper cover (6) is provided between the upper cover (3) and the base (1), and the lower end of the auxiliary upper cover (6) is hinged at the front end of the base (1) to assist The upper end of the upper cover (6) is close to the tail of the upper cover (3) and there is a device between the upper end and the upper cover (3) that can make the upper end cover (3) upward when a downward force is applied to the upper cover (3). ) The tail moves and presses down. The middle part of the auxiliary upper cover (6) is equipped with a nail plate (2) that can follow the auxiliary upper cover (6) when the auxiliary upper cover (6) is pressed down. The second pressing structure that presses down together, the second pressing structure includes the second transmission pin (12) and the second chute (11) in the middle of the auxiliary upper cover (6), the second transmission pin ( 12) Through the nail presser plate (2) and located in the second chute (11), the press-down structure includes a first transmission pin (8) on the upper cover (3) and a long strip-shaped second A chute (7), the first transmission pin (8) passes through the upper end of the auxiliary upper cover (6) and is located in the first chute (7), the first transmission pin (8) sleeves There is a roller (9) located between the two sides of the auxiliary upper cover (6), and the circumferential surface of the roller (9) abuts against the inner bottom surface of the upper cover (3). 2. The labor-saving stapler according to claim 1, characterized in that, both sides of the nail pressing plate (2) have lugs (2a) protruding from the top surface of the nail pressing plate (2) , the second transmission pin (12) passes through the lug (2a) and is hinged with the nail plate (2). 3. The labor-saving stapler according to claim 1 or 2, characterized in that, a compression spring (14) is fixed between the nail pressing plate (2) and the staple box (4), and the compression spring One end of (14) leans against the nail plate (2), and the other end of the compression spring (14) leans against the staple box (4). 4. The labor-saving stapler according to claim 1 or 2, characterized in that the rear pin (5) is sheathed with a torsion spring (13) and a needle groove hook piece (16), and the torsion spring (13) One end acts on the needle groove hook piece (16), and the other end acts on the base (1). 5. The labor-saving stapler according to claim 1 or 2, characterized in that a base spring (15) is fixed between the base (1) and the staple box (4), and the base spring (15 ) against the staple box (4), and the other end of the base spring (15) against the base (1). 6. The labor-saving stapler according to claim 1 or 2, characterized in that, the staple box (4) is provided with a staple pushing assembly capable of pushing the staples in the box (4) forward all the time .