Knife pad rotating device and binding machine

Abstract

The present invention discloses a knife pad rotating device, comprising a mounting bracket, a knife pad fixing seat and a driving spring; the knife pad fixing seat has a cylindrical end rotatably mounted on the mounting bracket; the driving spring has a driving sleeve portion and a driving toggle portion, the driving sleeve portion is sleeved on the cylindrical end, the driving toggle portion is a free end extending out of the driving sleeve portion, and the driving toggle portion causes the driving sleeve portion to radially contract or relax when toggled. The knife pad rotating device provided by the present invention utilizes the principle of a spring-type one-way clutch, and the driving spring is tightened to hold the knife pad fixing seat to transmit torque; the knife pad rotating device has a simple structure, low cost, and is quick and convenient to install.

Description

Technical Field

[0001] The invention relates to office equipment, in particular to a knife pad rotating device and a binding machine. Background Art

[0002] In an automatic punching and binding machine for office use, the punching drill needs to punch through paper or other binding materials and generate a corresponding signal to send to the control system of the binding machine. The control system controls the up and down movement of the drill; the drill also needs to be buffered and supported to avoid wear of the drill, which requires the use of a knife pad. The knife pad has conductive properties and is a special rubber product with a relatively high cost, and its service life needs to be extended as much as possible. Therefore, after each punching, the knife pad needs to be changed to avoid repeated contact with the drill at the same position.

[0003] The knife pad device on the existing binding machine has a complex structure for changing the position of the knife pad. The driving structure realizes the rotation of the knife pad through a gear rack or cam structure, and then cooperates with two sets of one-way bearings or ratchets to realize the unidirectional rotation of the knife pad. The cost is high and the installation is complicated.

[0004] Therefore, it is necessary to solve the above technical problems. Summary of the invention

[0005] In view of the above technical problems, the present invention provides a knife pad rotating device, which utilizes the principle of a spring-type one-way clutch and radially contracts or relaxes the driving spring through the friction between the driving spring and the knife pad fixing seat, thereby realizing the separation and combination of the driving spring and the knife pad fixing seat. The driving spring tightens the knife pad fixing seat to transmit torque. The knife pad rotating device has a simple structure, low cost, and is quick and convenient to install.

[0006] To achieve the above object, the technical solution of the present invention is:

[0007] A knife pad rotating device, comprising:

[0008] Mounting bracket;

[0009] A knife pad fixing seat having a cylindrical end rotatably mounted on the mounting bracket;

[0010] The driving spring comprises a driving sleeve portion and a driving toggle portion, wherein the driving sleeve portion is sleeved on the cylindrical end, and the driving toggle portion extends out of the driving sleeve portion at a free end, and the driving toggle portion causes the driving sleeve portion to radially contract or relax when toggled.

[0011] The above-mentioned knife pad rotating device utilizes the principle of a spring-type one-way clutch. The friction force between the driving spring and the knife pad fixing seat causes the driving spring to radially contract or relax, thereby realizing the separation and combination of the driving spring and the knife pad fixing seat. The driving spring is tightened and holds the knife pad fixing seat to transmit torque to realize the rotation of the knife pad. When the driving spring is separated from the knife pad fixing seat, the knife pad fixing seat is constrained and does not rotate, realizing the one-way rotation of the knife pad. The knife pad rotating device has a simple structure, low cost, and is quick and convenient to install.

[0012] Furthermore, a brake is provided between the knife pad fixing seat and the mounting bracket, which realizes the unidirectional rotation of the knife pad fixing seat. When the driving spring is separated from the knife pad fixing seat, the knife pad fixing seat is constrained by the brake and does not rotate.

[0013] Further, the brake member is a brake spring arranged in the opposite direction to the driving spring, and has a brake sleeve portion and a brake connection portion, wherein the brake sleeve portion is sleeved on the cylindrical end, and the brake connection portion extends out of the brake sleeve portion and is connected to the knife pad fixing seat. The brake spring has a simple structure, low cost, and is easy and quick to install.

[0014] Furthermore, the inner diameter of the driving sleeve portion is smaller than the outer diameter of the cylindrical end.

[0015] Furthermore, the inner diameter of the brake sleeve portion is smaller than the outer diameter of the cylindrical end.

[0016] Furthermore, the brake member is a one-way bearing. When the driving spring is separated from the knife pad fixing seat, the one-way rotation of the knife pad is achieved through the one-way bearing.

[0017] Furthermore, the brake member is a ratchet. When the driving spring is separated from the knife pad fixing seat, the one-way rotation of the knife pad is achieved through the ratchet.

[0018] Furthermore, the shifting part is a U-shaped shifting fork. The U-shaped shifting fork is easy to install and is conducive to shifting the driving spring to drive the knife pad to rotate in one direction.

[0019] Further, the mounting bracket includes a fixing plate and an insulating plate, wherein the insulating plate is located between the shim fixing seat and the fixing plate. The insulating plate insulates the shim fixing seat and the fixing plate, which is beneficial to the signal transmission between the drill bit and the shim.

[0020] A binding machine comprises any one of the above-mentioned knife pad rotating devices.

[0021] Compared with the prior art, the present invention has the following technical advantages: the knife pad rotating device utilizes the principle of a spring-type one-way clutch, and the friction between the driving spring and the knife pad fixing seat causes the driving spring to radially contract or relax, thereby realizing the separation and combination of the driving spring and the knife pad fixing seat, and the driving spring is tightened to hold the knife pad fixing seat to transmit torque to realize the rotation of the knife pad, and when the driving spring is separated from the knife pad fixing seat, the knife pad fixing seat is constrained by the braking part and does not rotate, realizing the one-way rotation of the knife pad; therefore, the knife pad rotating device has a simple structure, low cost, and is quick and convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a front view of an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 A top view of

[0024] Figure 3 yes Figure 2 AA section view;

[0025] Figure 4 It is a cross-sectional view of a brake component which is a one-way bearing. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the embodiments in the accompanying drawings.

[0027] like Figures 1 to 3 As shown, the first embodiment of the knife pad rotating device of the present invention includes a mounting bracket 10, a knife pad fixing seat 20, a braking member 30, a driving spring 40 and a retaining spring 50.

[0028] like Figure 1 and Figure 3 As shown, the knife pad fixing seat 20 has a cylindrical end 21 , and the cylindrical end 21 penetrates the mounting bracket 10 for installation. The knife pad is installed on the knife pad fixing seat 20 , and the knife pad fixing seat 20 can rotate on the mounting bracket 10 .

[0029] like Figure 1 and Figure 3 As shown, the brake member 30, the drive spring 40 and the retaining spring 50 are sequentially mounted on the cylindrical end 21 outside the mounting bracket 10; the retaining spring 50 is used to limit the drive spring 40. The drive spring 40 has a drive sleeve portion 41 and a drive toggle portion 42, the drive sleeve portion 41 is sleeved on the cylindrical end 21, the drive toggle portion 42 extends out of the drive sleeve portion 41 at a free end, and the inner diameter of the drive sleeve portion 41 is smaller than the outer diameter of the cylindrical end 21; the drive toggle portion 42 is toggled forward or backward, and the drive sleeve portion 41 is radially contracted or relaxed to achieve separation and combination with the cylindrical end 21.

[0030] When the driving sleeve portion 41 and the cylindrical end 21 are in a separated state, the brake member 30 restricts the rotation of the knife pad fixing seat 20 ; when the driving sleeve portion 41 and the cylindrical end 21 are in a combined state, the knife pad fixing seat 20 can rotate within the brake member 30 .

[0031] like Figure 2 As shown, the driving shifting part 42 at the outer end of the driving spring 40 is a U-shaped shifting fork 421 wound by its spring steel wire. The U-shaped shifting fork is easy to install and is conducive to shifting the driving spring to drive the knife pad to rotate in one direction.

[0032] like Figure 3 As shown, the mounting bracket 10 includes a fixing plate 11 and an insulating plate 12, and the insulating plate 12 is located between the shim fixing seat 20 and the fixing plate 11. The insulating plate insulates the shim fixing seat and the fixing plate, which is beneficial to the signal transmission between the drill bit and the shim.

[0033] The knife pad rotating device utilizes the principle of a spring-type one-way clutch. The friction between the driving spring and the knife pad fixing seat causes the driving spring to radially contract or relax, thereby realizing the separation and combination of the driving spring and the knife pad fixing seat. The driving spring is tightened and holds the knife pad fixing seat to transmit torque to realize the rotation of the knife pad. When the driving spring is separated from the knife pad fixing seat, the knife pad fixing seat is constrained by the braking member and does not rotate, realizing the one-way rotation of the knife pad. The knife pad rotating device has a simple structure, low cost, and is quick and convenient to install.

[0034] like Figure 1 and Figure 3 As shown, the brake member 30 is a brake spring 31, and the brake spring 31 has a brake sleeve portion 311 and a brake connection portion 312. The brake sleeve portion 311 is sleeved on the cylindrical end 21, and the brake connection portion 312 extends out of the brake sleeve portion 311 to connect the knife pad fixing seat 20. The inner diameter of the brake sleeve portion 312 is smaller than the outer diameter of the cylindrical end 21. The spring steel wire of the contact end of the brake connection portion 312 and the driving spring 40 extends outward to the hole of the mounting bracket 10 for fixing, and the other end is a free end. When the driving spring 40 is separated from the knife pad fixing seat 20, the brake spring 31 holds the knife pad fixing seat 20 tightly to realize the unidirectional rotation of the knife pad. The brake spring 31 has a simple structure, low cost, and is easy and quick to install.

[0035] like Figure 2 As shown, the driving toggle portion 42 of the driving spring 40 moves from position a to position b, the braking spring 31 radially relaxes and separates from the knife pad fixing seat 20, and the driving spring 40 tightens and holds the knife pad fixing seat 20 to rotate a certain angle; the driving toggle portion 42 of the driving spring 40 moves from position b to position a, the driving spring 40 radially relaxes and separates from the knife pad fixing seat 20, and the braking spring 31 tightens and holds the knife pad fixing seat 20 to prevent it from rotating, thereby realizing that the knife pad fixing seat 20 drives the knife pad to rotate in one direction.

[0036] like Figure 4 As shown in the second embodiment of the knife pad rotating device of the present invention, the brake member 30 is a one-way bearing 32. The driving spring 40 is twisted to hold the knife pad fixing seat 20 tightly and rotate it to a certain angle; when the driving spring 40 is separated from the knife pad fixing seat 20, the one-way bearing 32 limits the rotation of the knife pad fixing seat 20, and the one-way rotation of the knife pad is achieved through the one-way bearing 32. The brake member 30 can also be a ratchet, which is not shown in the figure. The one-way rotation of the knife pad is achieved through the ratchet.

[0037] The present invention further discloses a binding machine, comprising the knife pad rotating device of the first embodiment or the second embodiment.

[0038] In summary, the present invention is as described in the specification and the illustrations, and actual samples are made and tested for multiple times. From the test results, it is proved that the invention can achieve the expected purpose and its practicality is beyond doubt. The above embodiments are only used to facilitate the description of the content of the invention, and are not formally limited to it; any equivalent embodiments made by partial changes or modifications made by anyone with common knowledge in the technical field of the invention without departing from the scope of the technical features and similar features of the present invention and using the technical content disclosed by the invention, all belong to the protection scope of the present invention.

Claims

1. A knife pad rotating device, characterized in that: include: Mounting bracket; A knife pad fixing seat having a cylindrical end rotatably mounted on the mounting bracket; A driving spring, comprising a driving sleeve portion and a driving toggle portion, wherein the driving sleeve portion is sleeved on the cylindrical end, and the driving toggle portion extends out of the driving sleeve portion at a free end, and the driving toggle portion causes the driving sleeve portion to radially contract or relax when toggled; A brake member is provided between the knife pad fixing seat and the mounting bracket, the brake member is a brake spring arranged in the opposite direction to the driving spring, and has a brake sleeve portion and a brake connection portion, the brake sleeve portion is sleeved on the cylindrical end, and the brake connection portion extends out of the brake sleeve portion to connect with the knife pad fixing seat; The inner diameter of the driving sleeve portion is smaller than the outer diameter of the cylindrical end.

2. The knife pad rotating device according to claim 1, characterized in that: The inner diameter of the brake sleeve portion is smaller than the outer diameter of the cylindrical end.

3. The knife pad rotating device according to claim 1, characterized in that: The driving shifting part is a U-shaped shifting fork.

4. The knife pad rotating device according to claim 1, characterized in that: The mounting bracket comprises a fixing plate and an insulating plate, wherein the insulating plate is located between the knife pad fixing seat and the fixing plate.

5. A binding machine, characterized in that: It comprises the knife pad rotating device as described in any one of claims 1 to 4.

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