Ink reclaiming knife and printing mechanism

Abstract

The utility model relates to the technical field of printing mechanisms, in particular to an ink reclaiming knife and a printing mechanism. The ink reclaiming knife comprises a main knife body, at least one end, in the length direction of the main knife body, of the main knife body is connected with an auxiliary knife body, and the auxiliary knife body inclines relative to the main knife body; the main cutter body is provided with a first main cutter face and a second main cutter face which are distributed in the thickness direction of the main cutter body, and the auxiliary cutter body is provided with a first auxiliary cutter face and a second auxiliary cutter face which are distributed in the thickness direction of the auxiliary cutter body. The first main tool face is connected with the first auxiliary tool face, the included angle between the first main tool face and the first auxiliary tool face is smaller than 180 degrees, the second main tool face is connected with the second auxiliary tool face, and the included angle between the second main tool face and the second auxiliary tool face is larger than or equal to 180 degrees. The first auxiliary cutter face is a plane. By means of the ink reclaiming blade, the risk that slurry overflows from the two ends of the ink reclaiming blade can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing mechanism, and in particular to a back-ink blade and a printing mechanism. BACKGROUND

[0002] In the process of screen printing, the squeegee and the back-ink blade are arranged above the screen, the paste is laid on the upper surface of the screen, the printing turntable rotates to move the battery piece under the screen, and the squeegee and the back-ink blade cooperate with each other to realize the grid line printing of the paste on the battery piece.

[0003] The squeegee can apply pressure to the screen to extrude the paste through to the surface of the battery piece to form an electrode pattern; the back-ink blade can re-lay the paste on the screen and push the excess paste back to one side of the screen. However, in the process of re-laying the paste on the screen by the back-ink blade, the paste is easy to overflow from both ends of the back-ink blade, which will increase the loss of the paste and increase the cost. CONTENT OF THE INVENTION

[0004] The back-ink blade and the printing mechanism disclosed by the embodiments of the present application can reduce the risk of paste overflowing from both ends of the back-ink blade.

[0005] In order to achieve the above-mentioned purpose, in a first aspect, the embodiments of the present application disclose a back-ink blade, comprising:

[0006] A main blade body, at least one end of the main blade body along the length direction of the main blade body is connected with an auxiliary blade body, and the auxiliary blade body is inclined relative to the main blade body;

[0007] The main blade body has a first main blade surface and a second main blade surface distributed along the thickness direction of the main blade body, and the auxiliary blade body has a first auxiliary blade surface and a second auxiliary blade surface distributed along the thickness direction of the auxiliary blade body;

[0008] The first main blade surface and the first auxiliary blade surface are connected, and the included angle between the first main blade surface and the first auxiliary blade surface is less than one hundred and eighty degrees; the second main blade surface and the second auxiliary blade surface are connected, and the included angle between the second main blade surface and the second auxiliary blade surface is greater than or equal to one hundred and eighty degrees;

[0009] The first auxiliary blade surface is a plane.

[0010] In an optional embodiment, the thickness of the auxiliary blade body gradually increases in the direction along the auxiliary blade body from the end connected with the main blade body to the other end.

[0011] In an optional embodiment, one end of the auxiliary blade body away from the main blade body is a first end, and the auxiliary blade body is movable relative to the main blade body to adjust the minimum distance between the first end of the auxiliary blade body and the main blade body along the length direction of the main blade body.

[0012] In an alternative embodiment, the second end of the auxiliary blade body is rotationally coupled with the main blade body, and the rotation axis of the auxiliary blade body is perpendicular to the length direction and the thickness direction of the main blade body, respectively.

[0013] In an alternative embodiment, one of the main blade body and the auxiliary blade body is provided with a receiving groove, and the other is provided with a rotating part, the receiving groove extends to the bottom surface of the main blade body or the auxiliary blade body, and the rotating part is rotationally arranged in the receiving groove, the bottom surface of the one of the main blade body and the auxiliary blade body provided with the receiving groove is flush with the bottom surface of the rotating part.

[0014] In an alternative embodiment, the auxiliary blade body is of a telescopic structure, so as to adjust the minimum distance between the first end of the auxiliary blade body and the main blade body along the length direction of the main blade body.

[0015] In a second aspect, the present application provides a printing mechanism, which comprises a doctor blade and the ink return blade according to any one of the above embodiments, and the doctor blade and the ink return blade are spaced apart.

[0016] In an alternative embodiment, the ink return blade is arranged obliquely relative to the vertical direction, and the distance between the ink return blade and the ground plane gradually decreases along the ink return stroke direction of the ink return blade.

[0017] In an alternative embodiment, the printing mechanism further comprises a driving mechanism, the driving mechanism comprises a driving source and a transmission mechanism, the transmission mechanism is connected with the doctor blade and the ink return blade, respectively, and the driving source is used to drive the doctor blade or the ink return blade to ascend or descend.

[0018] The transmission mechanism is configured to drive one of the doctor blade and the ink return blade to ascend while driving the other to descend, and drive one of the doctor blade and the ink return blade to descend while driving the other to ascend.

[0019] In an alternative embodiment, the driving source is a telescopic driving member, and the transmission mechanism comprises a first vertical rod, a second vertical rod, a fixed rod, a first connecting rod and a second connecting rod.

[0020] The telescopic driving member is connected with the first vertical rod or the second vertical rod, the ink return blade is connected with the first vertical rod, the doctor blade is connected with the second vertical rod, the fixed rod is located between the first vertical rod and the second vertical rod, the first connecting rod is hingedly connected with the first vertical rod, the second vertical rod and the fixed rod, respectively, the second connecting rod is hingedly connected with the first vertical rod, the second vertical rod and the fixed rod, respectively, and the first connecting rod and the second connecting rod are spaced apart and parallel to each other in the vertical direction.

[0021] Compared with the related art, the application has the following beneficial effects:

[0022] In the application, the ink return blade includes a main blade body and an auxiliary blade body, at least one end of the main blade body is connected with the auxiliary blade body, the auxiliary blade body is located on one side of the main blade body and is inclined relative to the main blade body. When the ink return blade re-paves the paste on the screen, the part of the paste overflowing to both sides of the main blade body will be blocked by the auxiliary blade body, thereby reducing the risk of paste overflowing from both sides of the ink return blade.

[0023] In addition, since the first auxiliary blade surface of the auxiliary blade body is a plane, that is, the blade surface of the auxiliary blade body facing the paste is a plane, when the auxiliary blade body is cleaned by using a cleaning tool, compared with the case where the blade surface is a curved surface, the cleaning tool can be easily attached to the flat blade surface, thereby facilitating the cleaning of the blade surface.

[0024] Furthermore, when the paste is scraped back by using the ink return blade of the application, the first auxiliary blade surface will be in contact with the paste, and part of the paste will be splashed under the action of the first auxiliary blade surface. Since the first auxiliary blade surface is a plane, the first auxiliary blade surface makes the splashing direction of the paste consistent, and the paste is not easy to splash out of the ink return blade, while the curved surface will make the paste splash everywhere, causing waste of the paste.

[0025] Then, when the first auxiliary blade surface is a plane, the bottom edge of the first auxiliary blade surface is a straight line, so that when the ink return blade is inclined relative to the vertical direction, the bottom edge of the first auxiliary blade surface can be well attached to the screen. However, if the first auxiliary blade surface is a curved surface, the bottom edge of the first auxiliary blade surface is an arc, so that when the ink return blade is inclined relative to the vertical direction, the bottom edge of the first auxiliary blade surface cannot be attached to the screen, which obviously will cause the paste to leak from the bottom of the auxiliary blade body. It can be seen that by using the ink return blade of the application, even if the ink return blade is inclined relative to the vertical direction, it can be well attached to the screen. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0027] Figure 1 The top view of the ink return blade disclosed in the embodiments of the application;

[0028] Figure 2 The isometric view of the ink return blade disclosed in another embodiment of the application;

[0029] Figure 3 The exploded view of the ink return blade disclosed in another embodiment of the application;

[0030] Figure 4The structural diagram of the auxiliary cutter body disclosed in another embodiment of the present application is shown in the figure below.

[0031] Figure 5 The structural diagram of the printing mechanism disclosed in the embodiment of the present application is shown in the figure below.

[0032] Figure 6 Comparison between the printing mechanism of the prior art and the printing mechanism disclosed in the embodiment of the present application Figure 1 ;

[0033] Figure 7 Comparison between the printing mechanism of the prior art and the printing mechanism disclosed in the embodiment of the present application Figure 2 ;

[0034] Figure 8 The structural diagram of the driving mechanism disclosed in the embodiment of the present application is shown in the figure below.

[0035] Figure 9 The structural diagram of the driving mechanism when the first vertical rod is descending is shown in the figure below.

[0036] Figure 10 The structural diagram of the driving mechanism when the first vertical rod is ascending is shown in the figure below.

[0037] Explanation of reference numerals:

[0038] 100, main cutter body; 101, first main cutter face; 102, second main cutter face; 110, accommodating groove; 200, auxiliary cutter body; 201, first auxiliary cutter face; 202, second auxiliary cutter face; 210, rotating part; 300, squeegee; 400, driving mechanism; 410, driving source; 420, transmission mechanism; 421, first vertical rod; 422, second vertical rod; 423, fixed rod; 424, first connecting rod; 425, second connecting rod; 500, screen. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative work fall within the scope of protection of the present application.

[0040] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0041] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0042] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0043] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0044] The ink return knife and printing mechanism provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0045] like Figures 1 to 4 As shown in the figure, this application discloses an ink-returning knife, including:

[0046] Main blade 100, main blade 100 along its own length direction ( Figure 1 At least one end of the main blade 100 (in the direction indicated by the arrow m in the diagram) is connected to an auxiliary blade 200, which is inclined relative to the main blade 100. Specifically, the main blade 100 has an auxiliary blade 200 on any side along its length, and the auxiliary blade 200 is connected to the main blade 100, thus increasing the length of the ink return blade.

[0047] The main cutter body 100 has a first main cutting surface 101 and a second main cutting surface 102 distributed along the thickness direction of the main cutter body 100, and the auxiliary cutter body 200 has a first auxiliary cutting surface 201 and a second auxiliary cutting surface 202 distributed along the thickness direction of the auxiliary cutter body 200.

[0048] The first main cutting surface 101 and the first auxiliary cutting surface 201 are connected, and the included angle between the first main cutting surface 101 and the first auxiliary cutting surface 201 is less than one hundred and eighty degrees, the second main cutting surface 102 and the second auxiliary cutting surface 202 are connected, and the included angle between the second main cutting surface 102 and the second auxiliary cutting surface 202 is greater than or equal to one hundred and eighty degrees. Specifically, the included angle between the second main cutting surface 102 and the second auxiliary cutting surface 202 herein can be greater than ninety degrees.

[0049] The first auxiliary cutting surface 201 is a plane.

[0050] In the present application, the ink return blade includes a main cutter body 100 and an auxiliary cutter body 200, at least one end of the main cutter body 100 is connected with the auxiliary cutter body 200, the auxiliary cutter body 200 is located on one side of the main cutter body 100 and is inclined relative to the main cutter body 100, when the ink return blade re-paves the paste on the screen 500, the part of the paste overflowing to both sides of the main cutter body 100 will be blocked by the auxiliary cutter body 200, reducing the risk of paste overflowing from both sides of the ink return blade.

[0051] In addition, since the first auxiliary cutting surface 201 of the auxiliary cutter body 200 is a plane, that is, the cutting surface of the auxiliary cutter body 200 facing the paste is a plane, when the auxiliary cutter body 200 is cleaned by using a cleaning tool, compared with the case where the cutting surface is a curved surface, the cleaning tool can easily fit the flat cutting surface, so that the cutting surface is easily cleaned.

[0052] Furthermore, when the paste is scraped back by using the ink return blade of the present application, the first auxiliary cutting surface 201 will be in contact with the paste, part of the paste will be splashed under the action of the first auxiliary cutting surface 201, and since the first auxiliary cutting surface 201 is a plane, the first auxiliary cutting surface 201 makes the direction of splashing of the paste consistent, and it is not easy to make the paste splash outside the ink return blade, while the curved surface will make the paste splash everywhere, causing waste of the paste.

[0053] Then, when the first auxiliary blade face 201 is a plane, the bottom edge of the first auxiliary blade face 201 is a straight line, so when the ink return blade is inclined relative to the vertical direction, the bottom edge of the first auxiliary blade face 201 can well fit the screen plate 500; but if the first auxiliary blade face 201 is a curved surface, the bottom edge of the first auxiliary blade face 201 is an arc, so when the ink return blade is inclined relative to the vertical direction, the bottom edge of the first auxiliary blade face 201 cannot fit the screen plate 500, which will obviously cause the slurry to leak from the bottom of the auxiliary blade body 200. It can be seen that the ink return blade of the present application can well fit the screen plate even if the ink return blade is inclined relative to the vertical direction. It should be noted that the beneficial effects of the ink return blade being inclined relative to the vertical direction can be seen below.

[0054] In an optional embodiment, please refer to Figure 1 , the thickness of the auxiliary blade body 200 gradually increases in the direction extending from the end of the auxiliary blade body 200 connected to the main blade body 100 to the other end.

[0055] In the present application, the thickness of the auxiliary blade body 200 gradually increases in the direction extending from the end of the auxiliary blade body 200 connected to the main blade body 100 to the other end, which can prevent the end of the auxiliary blade body 200 away from the main blade body 100 from having a large thickness, thereby preventing the end of the auxiliary blade body 200 away from the main blade body 100 from cracking and breaking during frequent printing. In addition, the thickness of the auxiliary blade body 200 gradually increases in the above direction, which can reduce the included angle between the first auxiliary blade face 201 and the first main blade face 101, thereby increasing the inclination degree of the auxiliary blade body 200 and improving the blocking effect of the auxiliary blade body 200 on the slurry to reduce the risk of slurry overflowing from the edge of the first auxiliary blade face 201. Of course, the thickness of the auxiliary blade body 200 can remain unchanged or gradually decrease in the direction extending from the end of the auxiliary blade body 200 connected to the main blade body 100 to the other end, which is not limited in the present application.

[0056] In order to adapt the ink return blade of the present application to screen plates 500 of different widths, in an optional embodiment, the end of the auxiliary blade body 200 away from the main blade body 100 is the first end, and the auxiliary blade body 200 can move relative to the main blade body 100 to adjust the minimum distance between the first end of the auxiliary blade body 200 and the main blade body 100 in the length direction of the main blade body 100.

[0057] In the embodiment, the auxiliary cutter body 200 is movable relative to the main cutter body 100, and during the movement, the minimum distance between the first end of the auxiliary cutter body 200 and the main cutter body 100 along the length direction of the main cutter body 100 is constantly changing, which can make the auxiliary cutter body 200 protrude out of the main cutter body 100 by different lengths along the length direction of the main cutter body 100, so that the ink return blade can be adapted to screens 500 of different widths, and thus the ink return blade can be adapted to more processes. Of course, the connection between the auxiliary cutter body 200 and the main cutter body 100 can also be a fixed connection, and the two cannot move relative to each other, that is, the auxiliary cutter body 200 is fixed relative to the main cutter body 100.

[0058] In an alternative embodiment, referring to Figures 2 to 4 , the second end of the auxiliary cutter body 200 is rotationally connected with the main cutter body 100, and the rotation axis of the auxiliary cutter body 200 is perpendicular to the length direction and the thickness direction of the main cutter body 100.

[0059] In the embodiment, the second end of the auxiliary cutter body 200 is rotatable relative to the main cutter body 100, and during the rotation, the second end of the auxiliary cutter body 200 will move away from or close to the main cutter body 100, so as to adjust the minimum distance between the first end of the auxiliary cutter body 200 and the main cutter body 100 along the length direction of the main cutter body 100. The rotational connection between the auxiliary cutter body 200 and the main cutter body 100 can make the structure of the ink return blade simpler and easier to manufacture.

[0060] In an alternative embodiment, referring to Figure 3 and Figure 4 , one of the main cutter body 100 and the auxiliary cutter body 200 is provided with a receiving groove 110, and the other is provided with a rotating part 210, and the receiving groove 110 extends to the bottom surface of the main cutter body 100 or the auxiliary cutter body 200, that is, when the main cutter body 100 is provided with the receiving groove 110, the receiving groove 110 extends to the bottom surface of the main cutter body 100, and when the auxiliary cutter body 200 is provided with the receiving groove 110, the receiving groove 110 extends to the bottom surface of the auxiliary cutter body 200.

[0061] The rotating part 210 is rotatably arranged in the receiving groove 110, and the bottom surface of the one of the main cutter body 100 and the auxiliary cutter body 200 provided with the receiving groove 110 is flush with the bottom surface of the rotating part 210.

[0062] In the embodiment, the receiving groove 110 extends to the bottom surface of the one of the main cutter body 100 and the auxiliary cutter body 200 provided with the receiving groove 110, and the bottom surface of the rotating part 210 is flush with the bottom surface of the one of the main cutter body 100 and the auxiliary cutter body 200 provided with the receiving groove 110, that is, the rotating joint of the main cutter body 100 and the auxiliary cutter body 200 has a portion that overlaps and is embedded with each other, and the overlapping can provide two times of blocking to the paste, which can reduce the risk of paste leakage from the rotating joint between the main cutter body 100 and the auxiliary cutter body 200.

[0063] In one alternative embodiment, the auxiliary blade 200 is a telescopic structure (not shown in the figure) to adjust the minimum distance between the first end of the auxiliary blade 200 and the main blade 100 along the length direction of the main blade 100.

[0064] In this application, the auxiliary cutter body 200 is a telescopic structure, that is, the auxiliary cutter body 200 can be extended and retracted. The extension and retraction direction is parallel to the direction from the first end of the auxiliary cutter body 200 to the second end. By extending and retracting the auxiliary cutter body 200, the minimum distance between the first end of the auxiliary cutter body 200 and the main cutter body 100 along the length direction of the main cutter body 100 can be adjusted. The adjustment range is larger and more processes can be adapted.

[0065] In one optional embodiment, the auxiliary blade 200 includes a first segment and a second segment. The first segment is connected to the main blade 100. One of the first segment and the second segment is provided with a groove, and the other segment is provided with a sliding part. The groove extends to the bottom surface of the first segment or the second segment, and the sliding part is slidably disposed in the groove to realize the extension and retraction of the auxiliary blade 200. That is, the sliding direction of the sliding part is parallel to the direction from the first end to the second end of the auxiliary blade 200, and the bottom surface of the segment with the groove is flush with the bottom surface of the sliding part.

[0066] In this embodiment, the groove extends to the bottom surface of the first segment and the second segment where the groove is provided. The bottom surface of the first segment and the second segment where the groove is provided is flush with the bottom surface of the sliding part. That is to say, the sliding joint of the first segment and the second segment has overlapping and embedded parts. The overlap can provide two barriers to the slurry, which can prevent the risk of slurry leakage from the sliding joint between the main cutter body 100 and the auxiliary cutter body 200.

[0067] like Figures 5 to 10 As shown, this application also discloses a printing mechanism, including a doctor blade 300 and a return ink blade from any of the above embodiments. This gives the printing mechanism the beneficial effects of the return ink blade, which will not be elaborated further here. The doctor blade 300 and the return ink blade are spaced apart. Specifically, the return ink blade can move along with the doctor blade 300, and their movement directions are the same; in the direction of the doctor blade 300's ink scraping stroke ( Figure 7 In the direction indicated by the arrow in the image, the doctor blade 300 and the ink return blade are distributed sequentially.

[0068] The specific printing process is as follows: The squeegee 300 is controlled to move downwards and come into contact with the screen 500 to apply pressure to the screen 500; the squeegee 300 and the back-ink blade are controlled to move along the squeegee stroke direction. During the movement of the squeegee 300, the ink drips from the graphic portion of the screen 500, thus printing the grid lines onto the material, such as a silicon wafer; the squeegee 300 is controlled to move upwards, and the back-ink blade is controlled to move downwards and contact the screen 500. Then, the back-ink stroke direction of the squeegee 300 and the back-ink blade is controlled... Figure 6 The ink is moved in the direction indicated by the arrow in the middle, and the ink refill knife is used to refill the ink onto the screen 500 to achieve cyclic printing.

[0069] In some embodiments, such as Figure 6 and Figure 7 In the upper half of the image, the ink return blade can be parallel to the vertical direction. In this case, the distance between the ink return blade and the doctor blade 300 is relatively large, thus increasing the distance in one ink scraping stroke (see [link]). Figure 7 On the surface, the distance the scraper 300 moves is determined by... Figure 7 X2 is shown in the figure; in a re-inking cycle (see [reference]). Figure 6 On the other hand, the distance the ink scalpel moves is... Figure 6 X1 is shown in the figure.

[0070] In one alternative embodiment, please refer to Figure 5 The ink return blade is set at an angle relative to the vertical direction, and the distance between the ink return blade and the ground plane gradually decreases along the ink return stroke direction of the ink return blade.

[0071] In this embodiment, the distance between the ink return blade and the doctor blade 300 is relatively small, so that in one ink scraping stroke (see...). Figure 7 On the surface, the distance the scraper 300 moves is determined by... Figure 7 Y2 is shown in the diagram; in a reflow stroke (see...) Figure 6 On the other hand, the distance the ink scalpel moves is... Figure 6 Y1 is shown in the diagram. (By...) Figure 6 It can be deduced without a doubt that X1 > Y1, and by Figure 7 It can be deduced without a doubt that X2 > Y2. Therefore, compared to a vertically positioned recirculating blade, tilting the recirculating blade reduces the travel distance of the doctor blade 300 during the ink-scraping stroke, thus shortening the printing press's processing time and improving production efficiency. Furthermore, tilting the recirculating blade relative to the vertical direction ensures a line contact between it and the screen 500. This reduces the contact area between the recirculating blade and the screen 500, thereby increasing the pressure between them and reducing ink residue on the screen 500.

[0072] In one alternative embodiment, please refer to Figures 8 to 10The printing mechanism further comprises a driving mechanism 400, the driving mechanism 400 comprises a driving source 410 and a transmission mechanism 420, the transmission mechanism 420 is connected with the doctor blade 300 and the ink return blade respectively, and the driving source 410 is used for driving the doctor blade 300 or the ink return blade to lift. For example, the driving source 410 can be a pneumatic cylinder, an electric cylinder, an electrode or the like; and the transmission mechanism 420 can be a gear mechanism, a connecting rod mechanism or the like.

[0073] The transmission mechanism 420 is configured to drive the other to descend when one of the doctor blade 300 and the ink return blade lifts, and drive the other to lift when one of the doctor blade 300 and the ink return blade descends.

[0074] In the embodiment, the driving mechanism 400 comprises the driving source 410 and the transmission mechanism 420, the driving source 410 can drive the doctor blade 300 or the ink return blade to lift, and the transmission mechanism 420 can drive the ink return blade or the doctor blade 300 to descend when the driving source 410 drives the doctor blade 300 or the ink return blade to lift, and drive the ink return blade or the doctor blade 300 to lift when the driving source 410 drives the doctor blade 300 or the ink return blade to descend. It can be seen that, in the embodiment, the doctor blade 300 and the ink return blade are driven to move in opposite directions by the driving source 410 and the transmission mechanism 420, compared with the embodiment of “setting two driving sources 410 to respectively drive the doctor blade 300 and the ink return blade to move in opposite directions”, the number of the driving sources 410 can be reduced, thereby saving cost.

[0075] In an alternative embodiment, the driving source 410 is a telescopic driving member, and the transmission mechanism 420 comprises a first vertical rod 421, a second vertical rod 422, a fixed rod 423, a first connecting rod 424 and a second connecting rod 425. The telescopic driving member is connected with the first vertical rod 421 or the second vertical rod 422, the ink return blade is connected with the first vertical rod 421, the doctor blade 300 is connected with the second vertical rod 422, the fixed rod 423 is located between the first vertical rod 421 and the second vertical rod 422, the first connecting rod 424 is hingedly connected with the first vertical rod 421, the second vertical rod 422 and the fixed rod 423 respectively, the second connecting rod 425 is hingedly connected with the first vertical rod 421, the second vertical rod 422 and the fixed rod 423 respectively, and the first connecting rod 424 and the second connecting rod 425 are spaced apart and parallel to each other in the vertical direction.

[0076] In the embodiment, please refer to Figure 9For example, the telescopic driving member and the first vertical rod 421, when the telescopic driving member drives the first vertical rod 421 to descend, the first vertical rod 421 drives the second vertical rod 422 to descend through the first connecting rod 424 and the second connecting rod 425, so as to realize the purpose of driving the ink return blade to descend and the squeegee 300 to ascend; when the telescopic driving member drives the first vertical rod 421 to ascend, the first vertical rod 421 drives the second vertical rod 422 to ascend through the first connecting rod 424 and the second connecting rod 425, so as to realize the purpose of driving the ink return blade to ascend and the squeegee 300 to descend. The transmission mechanism 420 of the present application only includes several rod members, and the structure is simple, and the first vertical rod 421, the second vertical rod 422, the first connecting rod 424 and the second connecting rod 425 jointly form a parallelogram structure, which can provide good stability, so that the transmission mechanism 420 is not easy to deform when subjected to external force.

[0077] The above embodiments of the present application mainly describe the differences between the various embodiments, and the different optimization features between the various embodiments can be combined to form a better embodiment without contradiction. In view of the brevity of the text, the above will not be described again. The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative and not restrictive. Those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application, and all forms belong to the protection of the present application.

Claims

1. An ink return blade, characterized by, The application relates to a main blade body (100) connected with an auxiliary blade body (200) at at least one end in the length direction of the main blade body (100), the auxiliary blade body (200) being inclined relative to the main blade body (100). The main blade body (100) has a first main blade surface (101) and a second main blade surface (102) distributed in the thickness direction of the main blade body (100), and the auxiliary blade body (200) has a first auxiliary blade surface (201) and a second auxiliary blade surface (202) distributed in the thickness direction of the auxiliary blade body (200). The first main blade surface (101) and the first auxiliary blade surface (201) are connected, and the included angle between the first main blade surface (101) and the first auxiliary blade surface (201) is less than 180 degrees; the second main blade surface (102) and the second auxiliary blade surface (202) are connected, and the included angle between the second main blade surface (102) and the second auxiliary blade surface (202) is greater than or equal to 180 degrees. The first auxiliary blade surface (201) is a plane. The thickness of the auxiliary blade body (200) gradually increases in the direction from one end of the auxiliary blade body (200) connected with the main blade body (100) to the other end.

2. The inking blade of claim 1, wherein The auxiliary blade body (200) has a first end away from the main blade body (100), and the auxiliary blade body (200) is movable relative to the main blade body (100) to adjust the minimum distance between the first end of the auxiliary blade body (200) and the main blade body (100) in the length direction of the main blade body (100).

3. The inking blade of claim 1, wherein The second end of the auxiliary blade body (200) is rotationally connected with the main blade body (100), and the rotation axis of the auxiliary blade body (200) is perpendicular to the length direction and the thickness direction of the main blade body (100).

4. The inking blade of claim 3, wherein One of the main blade body (100) and the auxiliary blade body (200) is provided with a receiving groove (110) extending to the bottom surface of the main blade body (100) or the auxiliary blade body (200), and the other is provided with a rotating part (210) rotationally arranged in the receiving groove (110), and the bottom surface of the one provided with the receiving groove (110) is flush with the bottom surface of the rotating part (210).

5. The inking blade of claim 4, wherein The auxiliary blade body (200) is of a telescopic structure to adjust the minimum distance between the first end of the auxiliary blade body (200) and the main blade body (100) in the length direction of the main blade body (100).

6. The inking blade according to any one of claims 3 to 5, characterized in that The application further relates to a scraper (300) and the ink return blade, and the scraper (300) is spaced apart from the ink return blade.

7. A printing mechanism characterized by, The ink return blade is arranged to be inclined relative to the vertical direction, and the distance between the ink return blade and the ground plane gradually decreases in the ink return stroke direction of the ink return blade.

8. The printing mechanism of claim 7, wherein, ​ 9. The printing mechanism of claim 7, wherein, The printing mechanism further comprises a driving mechanism (400) including a driving source (410) and a transmission mechanism (420) connected with the squeegee (300) and the doctor blade respectively, the driving source (410) being used to drive the squeegee (300) or the doctor blade to lift up or down. The transmission mechanism (420) is configured to drive one of the squeegee (300) and the doctor blade to lift up while the other one to lift down, and vice versa.

10. The printing mechanism of claim 9, wherein, The driving source (410) is a telescopic driving member, and the transmission mechanism (420) includes a first vertical rod (421), a second vertical rod (422), a fixed rod (423), a first connecting rod (424) and a second connecting rod (425). The telescopic driving member is connected with the first vertical rod (421) or the second vertical rod (422), the doctor blade is connected with the first vertical rod (421), the squeegee (300) is connected with the second vertical rod (422), the fixed rod (423) is located between the first vertical rod (421) and the second vertical rod (422), the first connecting rod (424) is hingedly connected with the first vertical rod (421), the second vertical rod (422) and the fixed rod (423) respectively, the second connecting rod (425) is hingedly connected with the first vertical rod (421), the second vertical rod (422) and the fixed rod (423) respectively, and the first connecting rod (424) and the second connecting rod (425) are vertically spaced and parallel to each other.

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