Stapler

Abstract

A stapler comprises a support, a staple path assembly, an upper cover and a pressing hand cover, the pressing hand cover is hinged to guide holes in the two sides of the support through first hinge shafts, the first hinge shafts can slide relative to the guide holes, the pressing hand cover is located on the upper cover, and the tail end of the pressing hand cover and the tail end of the upper cover are hinged to a first hinge point. The middle of the upper cover and the middle of the nail channel assembly are hinged to a second hinge point of the support together, the second hinge point is located in front of the first hinge shaft, and the first hinge shaft is located above the first hinge point and the second hinge point. The upper cover and the staple path assembly of the stapler rotate around the same point, so that the stapling quality is stable, the stroke waste is less, and the labor-saving effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of paper binding, and particularly relates to a stapler. Background Art

[0002] The Chinese utility model with the authorization announcement number of CN217413903U discloses a stapler. As Figure 1 and Figure 2 shown, it includes a base 1a, a nail channel assembly 2a, an upper cover 3a and a pressing hand cover 4a. The middle part of the pressing hand cover 4a is rotationally connected to the first connection point 5a of the base 1a, the middle part of the upper cover 3a is rotationally connected to the second connection point 6a of the base 1a, the nail channel assembly 2a is rotationally connected to the third connection point 7a of the base 1a, and the tail end of the pressing hand cover 4a is hinged to the tail end of the upper cover 3a through a rotating connecting piece 8a. When binding paper, press the front end of the pressing hand cover 4a, the pressing hand cover 4a rotates around the first connection point 5a of the base 1a, the tail end of the pressing hand cover 4a drives the tail end of the upper cover 3a to lift through the rotating connecting piece 8a, the upper cover 3a rotates around the second connection point 6a of the base 1a, the front end of the upper cover 3a moves downward, and then presses against the front end of the nail channel assembly 2a, so that the nail channel assembly 2a rotates around the third connection point 7a of the base 1a, the front end of the nail channel assembly 2a moves towards the bottom of the base 1a, and the upper blade at the front end of the upper cover 3a applies a downward force to the nails in the nail channel assembly 2a, so that the nails are driven out from the nail outlet at the front end of the nail channel assembly 2a. After being transmitted by the pressing hand cover 4a and the upper cover 3a, the pressing force of this stapler is amplified twice, making it more labor-saving to use and providing a better user experience.

[0003] However, the existing staplers still have the following technical problems: the upper cover 3a rotates around the second connection point 6a of the base 1a, while the nail channel assembly 2a rotates around the third connection point 7a of the base 1a. In this way, the upper cover 3a and the nail channel assembly 2a are not at the same rotation point and cannot rotate synchronously, resulting in lateral movement between the upper cover 3a and the nail channel assembly 2a during nailing, and the nailing quality is very unstable. Secondly, the tail end of the pressing hand cover 4a is connected to the tail end of the upper cover 3a through a rotating connecting piece 8a. When pressing the pressing hand cover 4a, the lower end of the rotating connecting piece 8a will rotate counterclockwise. The counterclockwise rotation of the lower end of the rotating connecting piece 8a will first move forward and then slowly turn upward, so that the upward movement speed of the lower end of the rotating connecting piece 8a will be slow first and then fast. Since the lower end of the rotating connecting piece 8a is connected to the upper cover 3a, the movement speed of the rotating connecting piece 8a will affect the movement speed of the upper cover 3a. Eventually, the movement speed is too slow at the beginning of nailing, wasting too much stroke, and the movement speed is too fast before the end of nailing, not saving enough effort. Content of the Utility Model

[0004] The technical problem to be solved by the present utility model is to provide a stapler in which the upper cover and the nail channel assembly rotate around the same point, so that the stapling quality is stable, the stroke waste is small, and the labor-saving effect is good.

[0005] The technical solution of the present utility model is: a stapler, including a bracket, a nail channel assembly, an upper cover and a pressing hand cover. The pressing hand cover is hinged on the guiding holes on both sides of the bracket through a first hinge shaft, and the first hinge shaft can slide relative to the guiding holes. The pressing hand cover is located above the upper cover, and the tail end of the pressing hand cover is hinged to the tail end of the upper cover at a first hinge point. The middle part of the upper cover and the middle part of the nail channel assembly are hinged together on a second hinge point of the bracket. The second hinge point is located in front of the first hinge shaft, and the first hinge shaft is located above the first hinge point and the second hinge point.

[0006] The working principle of the stapler of the present utility model is as follows:

[0007] When binding paper, press the front end of the pressing hand cover. The pressing hand cover rotates around the first hinge shaft, and as the pressing hand cover is pressed down, its opening angle continuously changes. At this time, the first hinge shaft slides relative to the guiding holes of the bracket to change the hinge position, so that the pressing hand cover can be smoothly pressed down. At the same time, the tail end of the pressing hand cover is hinged to the tail end of the upper cover, which will drive the tail end of the upper cover to lift. Then the upper cover will rotate around the second hinge point, causing the upper blade at the front end of the upper cover to press down. At the same time, the nail channel assembly will also rotate around the second hinge point under the pressing of the upper cover. The front end of the nail channel assembly moves towards the bottom of the bracket, and the upper blade at the front end of the upper cover applies a downward force to the nails in the nail channel assembly to complete the stapling action.

[0008] After adopting the above structure, the present utility model has the following advantages:

[0009] The upper cover and the nail channel assembly of the stapler of the present utility model are hinged together on the second hinge point of the bracket, so that the upper cover and the nail channel assembly rotate synchronously around the same rotation point, which well solves the problem of lateral movement between the upper cover and the nail channel assembly, and the stapling quality is very stable. Secondly, the tail end of the pressing hand cover is directly hinged to the tail end of the upper cover, and there is no need for a rotating connecting piece in the middle, so that the influence of the movement speed of the rotating connecting piece on the movement speed of the upper cover can be well avoided, the stroke waste is small, and the labor-saving effect is good. Moreover, after abandoning the traditional rotating connecting piece, in order to adapt to the change of the opening angle during the continuous pressing of the pressing hand cover, it is realized by setting the first hinge shaft to slide relative to the guiding holes of the bracket to change the hinge position, so as to smoothly press down the pressing hand cover. The structure is simple and will not affect the movement speed of the upper cover.

[0010] Preferably, the following relationship is satisfied between the stapling force generated at the front end of the upper cover and the pressing force applied to the front end of the pressing hand cover:

[0011] L1>L2 and L3>L4;

[0012] Wherein: F 钉 is the nailing force generated at the front end of the upper cover, and F 压 is the pressing force applied to the front end of the push button cover. L1 is the distance between the front end of the push button cover and the first hinge shaft, L2 is the distance between the first hinge shaft and the first hinge point, L3 is the distance between the first hinge point and the second hinge point, and L4 is the distance between the second hinge point and the front end of the upper cover. This setting can form two sections of labor-saving structures, so that the pressing force will be amplified twice after being transmitted through the push button cover and the upper cover, making it more labor-saving to use and providing a better user experience.

[0013] Preferably, both the push button cover and the upper cover are hinged on the outside of the bracket, and the staple channel assembly is hinged on the inside of the bracket. This setting has a reasonable layout, a compact structure, and is convenient for the installation of each component.

[0014] Preferably, the staple channel assembly includes an outer staple channel and an inner staple channel slidably disposed in the outer staple channel, and a lock is provided at the tail end of the outer staple channel for locking the inner staple channel. This setting is convenient for popping out the inner staple channel for loading staples and can reliably fix the inner staple channel to the outer staple channel during stapling.

[0015] Preferably, one end of the lock is hinged to the outer staple channel and the other end is provided with a first hook portion that can hook the inner staple channel. This lock has a simple structure and is convenient for processing.

[0016] Preferably, the end of the lock opposite to the first hook portion is further provided with a pressing portion. When the pressing portion is pressed down, the first hook portion of the lock disengages from the inner staple channel. This setting can disengage the inner staple channel from the outer staple channel by operating the pressing portion of the lock, making the operation more convenient.

[0017] Preferably, the front end of the upper cover is provided with an upper blade, a positioning hole is provided on the upper blade, and the front end of the staple channel assembly is provided with a second hook portion that can hook the positioning hole of the upper blade. This setting can limit the position of the upper blade, making the nailing action more reliable and the nailing quality more stable.

[0018] Preferably, it further includes a guide rod fixedly disposed in the staple channel assembly and a pusher slidably disposed on the guide rod. This setting can guide the movement of the pusher by using the guide rod.

[0019] Preferably, a first elastic member is further provided on the guide rod. One end of the first elastic member abuts against the staple channel assembly and the other end abuts against the pusher, so that the pusher is always kept at the front end of the staple channel assembly. This setting also facilitates the installation of the first elastic member by using the guide rod, and the first elastic member can keep the pusher at the front end of the staple channel assembly all the time, so that the nailing action can be reliably completed. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of an existing stapler;

[0021] Figure 2 Schematic structural diagram of the base of an existing stapler;

[0022] Figure 3 Schematic structural diagram of the stapler of the present utility model;

[0023] Figure 4 Side view of the stapler of the present utility model;

[0024] Figure 5 is Figure 4 Cross-sectional view along A-A' in

[0025] Figure 6 Explosion diagram of the stapler of the present utility model;

[0026] Figure 7 Schematic diagram of the force analysis of the stapler of the present utility model;

[0027] In the prior art figure: 1a - base, 2a - nail track assembly, 3a - upper cover, 4a - press handle cover, 5a - first connection point, 6a - second connection point, 7a - third connection point, 8a - rotating connecting piece;

[0028] In the figure of the present utility model: 1 - bracket, 2 - nail track assembly, 3 - upper cover, 4 - press handle cover, 5 - first hinge shaft, 6 - guide hole, 7 - first hinge point, 8 - second hinge point, 9 - outer nail track, 10 - inner nail track, 11 - lock, 12 - first hook part, 13 - pressing part, 14 - upper blade, 15 - positioning hole, 16 - second hook part, 17 - guide rod, 18 - pusher, 19 - first elastic member, 20 - second elastic member, 21 - third elastic member, 22 - rivet, 23 - second hinge shaft, 24 - third hinge shaft. Specific embodiments

[0029] The present utility model will be further described below with reference to the accompanying drawings and in conjunction with embodiments.

[0030] Embodiment:

[0031] As Figures 3 - 6As shown in the figure, a stapler includes a bracket 1, a nail channel assembly 2, an upper cover 3 and a pressing hand cover 4. The pressing hand cover 4 is hinged on the guiding holes 6 on both sides of the bracket 1 through a first hinge shaft 5, and the first hinge shaft 5 can slide relative to the guiding holes 6. The pressing hand cover 4 is located above the upper cover 3, and the tail end of the pressing hand cover 4 and the tail end of the upper cover 3 are hinged at a first hinge point 7. The middle part of the upper cover 3 and the middle part of the nail channel assembly 2 are hinged together on a second hinge point 8 of the bracket 1. The second hinge point 8 is located in front of the first hinge shaft 5, and the first hinge shaft 5 is located above the first hinge point 7 and the second hinge point 8. In this embodiment, the tail end of the pressing hand cover 4 is hinged to the tail end of the upper cover 3 at the first hinge point 7 through two rivets 22, and the middle part of the upper cover 3 and the middle part of the nail channel assembly 2 are hinged together on the second hinge point 8 of the bracket 1 through a second hinge shaft 23. In this embodiment, the front, rear, upper and lower positions are based on Figure 3 as the standard.

[0032] In the stapler of the present utility model, the upper cover 3 and the nail channel assembly 2 are hinged together on the second hinge point 8 of the bracket 1, so that the upper cover 3 and the nail channel assembly 2 rotate synchronously around the same rotation point, which well solves the problem of lateral movement between the upper cover 3 and the nail channel assembly 2, and the nail driving quality is very stable. Secondly, the tail end of the pressing hand cover 4 is directly hinged to the tail end of the upper cover 3, and there is no need for a rotating connecting piece in the middle, so that the influence of the movement speed of the rotating connecting piece on the movement speed of the upper cover 3 can be well avoided, the stroke waste is less and the labor-saving effect is good. Moreover, after abandoning the traditional rotating connecting piece, in order to adapt to the change of the opening angle during the continuous pressing of the pressing hand cover 4, the first hinge shaft 5 is set to slide relative to the guiding hole 6 of the bracket 1 to change the hinge position, so as to realize the smooth pressing of the pressing hand cover 4. The structure is simple and will not affect the movement speed of the upper cover 3.

[0033] As Figure 7 shown, the nail driving force F 钉 generated at the front end of the upper cover 3 压 and the pressing force F

[0034] applied to the front end of the pressing hand cover 4 satisfy the following relationship:

[0035] Among them: F 钉 is the nail driving force generated at the front end of the upper cover 3, F 压 is the pressing force applied to the front end of the pressing hand cover 4, L1 is the distance between the front end of the pressing hand cover 4 and the first hinge shaft 5, L2 is the distance between the first hinge shaft 5 and the first hinge point 7, L3 is the distance between the first hinge point 7 and the second hinge point 8, and L4 is the distance between the second hinge point 8 and the front end of the upper cover 3. This setting can form two labor-saving structures, so that the pressing force will be amplified twice after being transmitted through the pressing hand cover 4 and the upper cover 3, making it more labor-saving and providing a better user experience.

[0036] The pressing hand cover 4 and the upper cover 3 are both hinged to the outside of the bracket 1, and the staple track assembly 2 is hinged to the inside of the bracket 1. This setting has a reasonable layout, a compact structure, and is convenient for the installation of each component.

[0037] The staple track assembly 2 includes an outer staple track 9 and an inner staple track 10 slidably disposed within the outer staple track 9. A lock 11 for locking the inner staple track 10 is provided at the tail end of the outer staple track 9. This setting not only facilitates the ejection of the inner staple track 10 for loading staples but also enables the reliable fixation of the inner staple track 10 to the outer staple track 9 during stapling.

[0038] One end of the lock 11 is hinged to the outer staple track 9 and the other end is provided with a first hook portion 12 that can hook the inner staple track 10. In this embodiment, the lock 11 is hinged to the outer staple track 9 through a third hinge shaft 24. The lock 11 has a simple structure and is convenient to process.

[0039] The end of the lock 11 opposite to the first hook portion 12 is further provided with a pressing portion 13. When the pressing portion 13 is pressed down, the first hook portion 12 of the lock 11 disengages from the inner staple track 10. This setting enables the separation of the inner staple track 10 from the outer staple track 9 by operating the pressing portion 13 of the lock 11, making the operation more convenient.

[0040] The front end of the upper cover 3 is provided with an upper blade 14, and a positioning hole 15 is provided on the upper blade 14. The front end of the staple track assembly 2 is provided with a second hook portion 16 that can hook the positioning hole 15 of the upper blade 14. This setting can limit the position of the upper blade 14, making the stapling action more reliable and the stapling quality more stable.

[0041] It further includes a guide rod 17 fixedly provided within the staple track assembly 2 and a pusher 18 slidably disposed on the guide rod 17. In this embodiment, one end of the guide rod 17 is fixedly provided at the tail end of the outer staple track 9 and the other end is inserted into the pusher 18. This setting can guide the movement of the pusher 18 by means of the guide rod 17.

[0042] A first elastic member 19 is further provided on the guide rod 17. One end of the first elastic member 19 abuts against the staple track assembly 2 and the other end abuts against the pusher 18, causing the pusher 18 to always remain at the front end of the staple track assembly 2. In this embodiment, the first elastic member 19 is a compression spring. This setting also facilitates the installation of the first elastic member 19 by means of the guide rod 17, and the first elastic member 19 can cause the pusher 18 to always remain at the front end of the staple track assembly 2, thereby enabling the reliable completion of the stapling action.

[0043] In this embodiment, a second elastic member 20 is further provided between the front end of the upper cover 3 and the front end of the staple track assembly 2. The second elastic member 20 is a compression spring. A third elastic member 21 is further provided between the tail end of the staple track assembly 2 and the bracket 1. The third elastic member 21 is a tension spring.

[0044] The working principle of the stapler of the present utility model is as follows:

[0045] When binding paper, press the front end of the press handle cover 4. The press handle cover 4 rotates around the first hinge shaft 5. As the press handle cover 4 is pressed down, its opening angle changes continuously. At this time, the first hinge shaft 5 slides relative to the guide hole 6 of the bracket 1 to change the hinge position, enabling the press handle cover 4 to be smoothly pressed down. At the same time, the tail end of the press handle cover 4 is hinged to the tail end of the upper cover 3, driving the tail end of the upper cover 3 to lift. Then the upper cover 3 rotates around the second hinge point 8, causing the upper blade 14 at the front end of the upper cover 3 to press down. At the same time, the staple track assembly 2 also rotates around the second hinge point 8 under the pressing of the upper cover 3. The front end of the staple track assembly 2 moves towards the bottom of the bracket 1. The upper blade 14 at the front end of the upper cover 3 exerts a downward force on the nails in the staple track assembly 2 to complete the stapling action. The force analysis process is as follows: As Figure 7 shown, the pressing force F applied to the front end of the press handle cover 4 压 rotates around the first hinge shaft 5 through the first power arm L1. The first power arm L1 is the distance between the front end of the press handle cover 4 and the first hinge shaft 5. Then, through the second resistance arm L2, a pulling force F for pulling the upper cover 3 is generated at the first hinge point 7 拉 , and the second resistance arm L2 is the distance between the first hinge shaft 5 and the first hinge point 7. According to the lever principle: F 压 ×L1 = F 拉 ×L2, and we get Since L1 > L2, so F 拉 is greater than F 压 , that is to say, the pressing force F applied to the front end of the press handle cover 4 压 is amplified by the first labor-saving lever of the press handle cover 4; the pulling force F for pulling the upper cover 3 拉 then rotates around the second hinge point 8 through the third power arm L3. The third power arm L3 is the distance between the first hinge point 7 and the second hinge point 8. Then, through the fourth resistance arm L4, a stapling force F is generated at the front end of the upper cover 3 钉 , and the fourth resistance arm L4 is the distance between the second hinge point 8 and the front end of the upper cover 3. According to the lever principle: F 拉 ×L3 = F 钉 ×L4, and we get Since L3 > L4, so F 钉 is greater than F 拉 , that is to say, the pulling force F for pulling the upper cover 3 拉 is amplified by the second labor-saving lever of the upper cover 3. Therefore, the pressing force F applied to the front end of the press handle cover 4 压 is amplified twice after being transmitted through the press handle cover 4 and the upper cover 3, so that the final stapling force F generated at the front end of the upper cover 3 钉 and the pressing force F applied to the front end of the press handle cover 4 压 satisfy the following relationship:

Claims

1. A stapler, comprising a bracket (1), a staple channel assembly (2), an upper cover (3) and a snap cover (4), characterized in that: The snap cover (4) is hinged to the guide holes (6) on both sides of the bracket (1) through a first hinge shaft (5), and the first hinge shaft (5) can slide relative to the guide holes (6). The snap cover (4) is located on the upper cover (3), and the rear end of the snap cover (4) is hinged to the rear end of the upper cover (3) at a first hinge point (7). The middle part of the upper cover (3) is hinged to the second hinge point (8) of the bracket (1) together with the middle part of the nail channel assembly (2). The second hinge point (8) is located at the front end of the first hinge shaft (5), and the first hinge shaft (5) is located above the first hinge point (7) and the second hinge point (8).

2. A stapler according to claim 1, characterized in that: The nailing force F generated by the front end of the upper cover (3) 钉 and the pressing force F applied to the front end of the snap cover (4) 压 The following relationship is satisfied: L1>L2 and L3>L4; Among them: F 钉 is the nailing force generated by the front end of the upper cover (3), F 压 is the pressing force applied to the front end of the snap cover (4), L1 is the distance between the front end of the snap cover (4) and the first hinge shaft (5), L2 is the distance between the first hinge shaft (5) and the first hinge point (7), L3 is the distance between the first hinge point (7) and the second hinge point (8), and L4 is the distance between the second hinge point (8) and the front end of the upper cover (3).

3. A stapler according to claim 1, characterized in that: The snap cover (4) and the upper cover (3) are both hinged on the outside of the bracket (1), and the nail channel assembly (2) is hinged on the inside of the bracket (1).

4. A stapler according to claim 1, characterized in that: The nail channel assembly (2) comprises an outer nail channel (9) and an inner nail channel (10) slidably arranged in the outer nail channel (9), and a lock buckle (11) for locking the inner nail channel (10) is provided at the rear end of the outer nail channel (9).

5. A stapler according to claim 4, characterized in that: One end of the lock buckle (11) is hinged to the outer nail track (9) and the other end is provided with a first hook (12) that can hook the inner nail track (10).

6. A stapler according to claim 5, characterized in that: A pressing portion (13) is further provided at the end of the lock buckle (11) opposite to the first hook portion (12); when the pressing portion (13) is pressed downward, the first hook portion (12) of the lock buckle (11) is separated from the inner nail channel (10).

7. A stapler according to claim 1, characterized in that: The front end of the upper cover (3) is provided with an upper blade (14), the upper blade (14) is provided with a positioning hole (15), and the front end of the nail channel assembly (2) is provided with a second hook (16) that can hook the positioning hole (15) of the upper blade (14).

8. A stapler according to claim 1, characterized in that: It also includes a guide rod (17) fixed in the nail channel assembly (2) and a nail pusher (18) slidably mounted on the guide rod (17).

9. A stapler according to claim 8, characterized in that: The guide rod (17) is also provided with a first elastic member (19), one end of the first elastic member (19) abuts against the nail channel assembly (2) and the other end of the first elastic member (19) abuts against the nail pusher (18), so that the nail pusher (18) is always kept at the front end of the nail channel assembly (2).

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