Printing head and screen printing machine

Through the modularly designed printing head, the use of a detachable connecting plate and a motor lead screw system, the problem of inconvenient disassembly of scrapers is solved and the printing head is conveniently inspected and maintained.

CN223173757UActive Publication Date: 2025-08-01WUXI LEAD INTELLIGENT EQUIP CO LTD
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Patent Information

Application Number
CN202422254508.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-13
Publication Date
2025-08-01
Estimated Expiration
2034-09-13

AI Technical Summary

Technical Problem

The existing printing head has complex structure and inconvenient scraper disassembly, which leads to difficulty in maintenance.

Method used

The print head adopts a modular design, including a mounting bracket, a first and second drive mechanism, a first and second scraper, is connected to the scraper through a detachable connecting plate, and combines the motor and lead screw guide system to achieve convenient disassembly and angle adjustment of the scraper.

Benefits of technology

The printing head structure is simplified, which is convenient for maintenance and maintenance, and improves the convenience of scraper replacement and angle adjustment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a printing head and a screen printing machine. The printing head comprises a mounting bracket, a printing head and a driving device, the first driving mechanism is arranged on the mounting bracket, and the first driving mechanism comprises a first connecting plate; the second driving mechanism and the first driving mechanism are arranged on the mounting bracket in a spaced mode in the X direction, and the second driving mechanism comprises a second connecting plate; the first scraper is detachably connected with the first connecting plate; the second scraper and the first scraper are arranged in a spaced mode in the Y direction, and the second scraper is detachably connected with the second connecting plate. The technical scheme provided by the utility model is simple in structure and convenient to overhaul and maintain.
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Description

Technical Field

[0001] This application belongs to the technical field of photovoltaic module processing equipment, and particularly relates to a printing head and a screen printing machine. Background Art

[0002] In the prior art, the structure of the printing head is complex, and it is inconvenient to disassemble the squeegee, resulting in inconvenient maintenance of the printing head. Utility Model Content

[0003] The purpose of the embodiments of this application is to provide a printing head and a screen printing machine.

[0004] According to the first aspect of the embodiments of this application, a printing head is provided, including:

[0005] An installation bracket;

[0006] A first driving mechanism, the first driving mechanism is arranged on the installation bracket, and the first driving mechanism includes a first connecting plate;

[0007] A second driving mechanism, the second driving mechanism and the first driving mechanism are arranged on the installation bracket at an interval in the X direction, and the second driving mechanism includes a second connecting plate;

[0008] A first squeegee, the first squeegee is detachably connected to the first connecting plate;

[0009] A second squeegee, the second squeegee is arranged at an interval from the first squeegee in the Y direction, and the second squeegee is detachably connected to the second connecting plate.

[0010] Optionally, a receiving space is formed inside the installation bracket;

[0011] The first driving mechanism further includes a first motor and a first driving component, the first driving component is arranged in the receiving space, the first motor is located above the receiving space in the Z direction, the first connecting plate is connected to the first driving component, and the first motor can drive the first connecting plate to move in the Z direction;

[0012] The second driving mechanism further includes a second motor and a second driving component, the second driving component is arranged in the receiving space, the second motor is located above the receiving space in the Z direction, the second connecting plate is connected to the second driving component, and the second motor can drive the second connecting plate to move in the Z direction.

[0013] Optionally, the first driving assembly includes a first lead screw, a first guide rail, and a first nut block. The first lead screw is connected to the driving end of the first motor. The first nut block is sleeved on the first lead screw and rotatably connected to the first lead screw. The first guide rail is arranged on the mounting bracket. The first connecting plate is connected to the first nut block, and the first connecting plate is slidably connected to the first guide rail.

[0014] Optionally, the second driving assembly includes a second lead screw, a second guide rail, a second nut block, and a driving member. The second lead screw is connected to the driving end of the second motor. The second nut block is sleeved on the second lead screw and rotatably connected to the second lead screw. The second guide rail is arranged on the mounting bracket. The driving member is connected to the second nut block, and the driving end of the driving member is connected to the second connecting plate. The second connecting plate is slidably connected to the second guide rail.

[0015] Optionally, the second connecting plate includes a first connecting portion and a second connecting portion. A groove is formed between the first connecting portion and the second connecting portion. An elastic connecting member is arranged in the groove. The driving end of the driving member is connected to the elastic connecting member.

[0016] Optionally, the second driving mechanism further includes a grating. The grating is arranged on the second connecting plate. The mounting bracket is provided with a reading assembly. The reading assembly can monitor the displacement of the second connecting plate in the Z direction through the grating.

[0017] Optionally, the first connecting plate includes a first end face. A limiting groove is formed in the first end face and arranged along the X direction;

[0018] The first squeegee includes a limiting portion. The limiting portion is arranged in the limiting groove;

[0019] The first squeegee is connected to the first connecting plate by bolts.

[0020] Optionally, the second connecting plate is connected to the second squeegee by bolts.

[0021] Optionally, the printing head further includes an adjusting member. The adjusting member includes two limiting pins and an adjusting plate. The two limiting pins are arranged on the second connecting plate at intervals. One end of the adjusting plate is rotatably connected to the second connecting plate. The adjusting plate is located between the two limiting pins. The other end of the adjusting plate is connected to the second squeegee.

[0022] According to the second aspect of the embodiments of the present application, a screen printing machine is provided, including the above-mentioned printing head.

[0023] One technical effect of the embodiment of the present application is that the first driving mechanism and the second driving mechanism are both arranged on the mounting bracket to form a modular structure. The first connecting plate is detachably connected to the first scraper, and the second connecting plate is detachably connected to the second scraper, making the printing head have a simple structure and being convenient for inspection and maintenance.

[0024] Other features and advantages of the present application will become clear from the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings incorporated in and constituting a part of this specification illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0026] Figure 1 It is a schematic structural diagram of the printing head in the embodiment of the present application;

[0027] Figure 2 It is a schematic structural diagram of the printing head in the embodiment of the present application;

[0028] Figure 3 It is a schematic structural diagram of the printing head in the embodiment of the present application;

[0029] Figure 4 It is a schematic structural diagram of the printing head in the embodiment of the present application.

[0030] Description of the reference numerals: mounting bracket 1; first mounting plate 11; second mounting plate 12; third mounting plate 13; fourth mounting plate 14; accommodation space 15; first driving mechanism 2; first motor 21; first lead screw 22; first guide rail 23; first connecting plate 24; first end face 241; limiting groove 242; first nut seat 25; second driving mechanism 3; second motor 31; second lead screw 32; second guide rail 33; second connecting plate 34; first connecting portion 341; second connecting portion 342; groove 343; second nut seat 35; driving member 36; elastic connecting member 37; third guide rail 38; adjusting member 4; limiting pin 41; adjusting plate 42; first scraper 5; second scraper 6; grating 7; reading assembly 8. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Now, various exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of the components and steps set forth in these embodiments, numerical expressions and values do not limit the scope of the present application.

[0032] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as a limitation to the present application and its application or use.

[0033] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the specification.

[0034] In all the examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0035] It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof in subsequent figures is not necessary.

[0036] First, it should be noted that for the X-direction, Y-direction, and Z-direction mentioned in the embodiments of the present application, please refer to the directions marked in the attached Figure 1 drawings. Among them, the X-direction, Y-direction, and Z-direction intersect pairwise.

[0037] First, it should be noted that for the X-direction, Y-direction, and Z-direction mentioned in the embodiments of the present application, please refer to the attached Figure 1 , Figure 2 drawings and the directions marked therein. Among them, the X-direction, Y-direction, and Z-direction intersect pairwise.

[0038] As Figures 1-4 shown, according to the first aspect of the embodiments of the present application, a print head is provided, which includes a mounting bracket 1, a first driving mechanism 2, a second driving mechanism 3, a first squeegee 5, and a second squeegee 6; the first driving mechanism 2 is disposed on the mounting bracket 1, and the first driving mechanism 2 includes a first connecting plate 24; the second driving mechanism 3 is spaced from the first driving mechanism 2 in the X-direction on the mounting bracket 1, and the second driving mechanism 3 includes a second connecting plate 34; the first squeegee 5 is detachably connected to the first connecting plate 24; the second squeegee 6 is spaced from the first squeegee 5 in the Y-direction, and the second squeegee 6 is detachably connected to the second connecting plate 34.

[0039] As Figure 1 , Figure 3 and Figure 4 shown, the print head includes a mounting bracket 1, a first driving mechanism 2, a second driving mechanism 3, a first squeegee 5, and a second squeegee 6.

[0040] Among them, the first driving mechanism 2 and the second driving mechanism 3 are spaced in the X-direction on the mounting bracket 1, so that the first driving mechanism 2, the second driving mechanism 3, and the mounting bracket 1 are modularized for easy maintenance.

[0041] The first driving mechanism 2 includes a first connecting plate 24, and the first connecting plate 24 is detachably connected to the first squeegee 5, so as to facilitate the replacement of the first squeegee 5 and also facilitate the adjustment of the angle of the first squeegee 5 as needed.

[0042] The second driving mechanism 3 includes a second connecting plate 34, and the second connecting plate 34 is detachably connected to the second squeegee 6, so as to facilitate the replacement of the second squeegee 6 and also facilitate the adjustment of the angle of the second squeegee 6 as needed.

[0043] Therefore, the print head provided by the embodiment of the present application has a simple structure and is convenient for inspection and maintenance.

[0044] Among them, the first squeegee 5 can be a flood blade, and the second squeegee 6 is a squeegee; alternatively, the first squeegee 5 is a squeegee and the second squeegee 6 is a flood blade; or, both the first squeegee 5 and the second squeegee 6 are squeegees.

[0045] In an optional embodiment, a receiving space 15 is formed in the mounting bracket 1; the first driving mechanism 2 further includes a first motor 21 and a first driving component, the first driving component is disposed in the receiving space 15, the first motor 21 is located above the receiving space 15 in the Z direction, the first connecting plate 24 is connected to the first driving component, and the first motor 21 can drive the first connecting plate 24 to move in the Z direction; the second driving mechanism 3 further includes a second motor 31 and a second driving component, the second driving component is disposed in the receiving space 15, the second motor 31 is located above the receiving space 15 in the Z direction, the second connecting plate 34 is connected to the second driving component, and the second motor 31 can drive the second connecting plate 34 to move in the Z direction.

[0046] As Figure 3 and Figure 4 shown, a receiving space 15 is formed in the mounting bracket 1. Specifically, the mounting bracket 1 includes a first mounting plate 11, a second mounting plate 12, a third mounting plate 13 and a fourth mounting plate 14. The first mounting plate 11 and the third mounting plate 13 are spaced apart in the Z direction, the second mounting plate 12 and the fourth mounting plate 14 are spaced apart in the X direction, the second mounting plate 12 connects the first mounting plate 11 and the third mounting plate 13, and the fourth mounting plate 14 connects the first mounting plate 11 and the third mounting plate 13. Therefore, the first mounting plate 11, the second mounting plate 12, the third mounting plate 13 and the fourth mounting plate 14 enclose the receiving space 15.

[0047] The first driving mechanism 2 further includes a first motor 21 and a first driving component. Among them, the first motor 21 is arranged on the first mounting plate 11, the first driving component is located in the accommodation space 15, a first through hole is formed on the first mounting plate 11, the driving end of the first motor 21 is connected to the first driving component through the first through hole, a second through hole is formed on the third mounting plate 13, and the first connecting plate 24 passes through the second through hole and is connected to the first driving component. The first motor 21 drives the first driving component to drive the first connecting plate 24 to move in the Z direction, so that the first scraper 5 moves in the Z direction.

[0048] The second driving mechanism 3 further includes a second motor 31 and a second driving component. Among them, the second motor 31 is arranged on the first mounting plate 11, the second motor 31 and the first motor 21 are arranged at intervals in the X direction, the second driving component is located in the accommodation space 15, the second driving component and the first driving component are arranged at intervals in the X direction, a third through hole is further formed on the first mounting plate 11, the driving end of the second motor 31 is connected to the second driving component through the second through hole, a fourth through hole is further formed on the third mounting plate 13, and the second connecting plate 34 passes through the fourth through hole and is connected to the second driving component. The second motor 31 drives the second driving component to drive the second connecting plate 34 to move in the Z direction, so that the second scraper 6 moves in the Z direction.

[0049] In an alternative embodiment, the first driving component includes a first lead screw 22, a first guide rail 23 and a first nut seat 25. The first lead screw 22 is connected to the driving end of the first motor 21. The first nut seat 25 is sleeved on the first lead screw 22 and is rotatably connected to the first lead screw 22. The first guide rail 23 is arranged on the mounting bracket 1. The first connecting plate 24 is connected to the first nut seat 25, and the first connecting plate 24 is slidably connected to the first guide rail 23.

[0050] As Figure 3 and Figure 4As shown, the first driving component includes a first lead screw 22, a first guide rail 23, and a first nut block 25. Among them, the first lead screw 22 is connected to the driving end of the first motor 21. The length direction of the first lead screw 22 is the same as the Z direction. The first motor 21 drives the first lead screw 22 to rotate, and the first lead screw 22 rotates around the Z direction. The first nut block 25 is sleeved on the first lead screw 22 and is rotatably connected to the first lead screw 22. Therefore, when the first lead screw 22 rotates around the Z direction, the first nut block 25 can move relative to the length direction of the first lead screw 22, that is, the first nut block 25 can move along the Z direction. The first connecting plate 24 is connected to the first nut block 25. When the first nut block 25 moves along the Z direction, the first connecting plate 24 will also move accordingly. The first guide rail 23 is arranged on the mounting bracket 1. The length direction of the first guide rail 23 is the same as the Z direction. The first connecting plate 24 is slidably connected to the first guide rail 23 through a first slider. Therefore, when the first connecting plate 24 moves along the Z direction, the first slider will move along the first guide rail 23 in the Z direction. The first guide rail 23 can provide a guiding function for the first connecting plate 24 to move along the Z direction to prevent the first connecting plate 24 from being skewed, and further prevent the first scraper 5 from being skewed.

[0051] In an optional embodiment, the second driving component includes a second lead screw 32, a second guide rail 33, a second nut block 35, and a driving member 36. The second lead screw 32 is connected to the driving end of the second motor 31. The second nut block 35 is sleeved on the second lead screw 32 and is rotatably connected to the second lead screw 32. The second guide rail 33 is arranged on the mounting bracket 1. The driving member 36 is connected to the second nut block 35. The driving end of the driving member 36 is connected to the second connecting plate 34. The second connecting plate 34 is slidably connected to the second guide rail 33.

[0052] As Figure 3 and Figure 4As shown in the figure, the second driving component includes a second lead screw 32, a second guide rail 33, a second nut seat 35, and a driving member 36. Among them, the second lead screw 32 is connected to the driving end of the second motor 31. The length direction of the second lead screw 32 is the same as the Z direction. The second motor 31 drives the second lead screw 32 to rotate, and the second lead screw 32 rotates around the Z direction. The second nut seat 35 is sleeved on the second lead screw 32 and is rotatably connected to the second lead screw 32. Therefore, when the second lead screw 32 rotates around the Z direction, the second nut seat 35 can move relative to the length direction of the second lead screw 32, that is, the second nut seat 35 can move along the Z direction. The driving member 36 is arranged on the second nut seat 35 and can move along the Z direction with the second nut seat 35. The driving end of the driving member 36 is connected to the second connecting plate 34. Therefore, when the second nut seat 35 moves along the Z direction, the second connecting plate 34 will also move accordingly, and the driving member 36 can independently drive the second connecting plate 34 to move along the Z direction to finely adjust the second scraper 6 in the Z direction. The second guide rail 33 is arranged on the mounting bracket 1. The length direction of the second guide rail 33 is the same as the Z direction. The second connecting plate 34 is slidably connected to the second guide rail 33 through a second slider. Therefore, when the second connecting plate 34 moves along the Z direction, the second slider will move along the second guide rail 33 in the Z direction. The second guide rail 33 can provide a guiding function for the second connecting plate 34 to move along the Z direction to prevent the second connecting plate 34 from deflecting and further prevent the second scraper 6 from deflecting.

[0053] In a preferred embodiment, the second driving mechanism 3 further includes a third guide rail 38. The length direction of the third guide rail 38 is the same as the Z direction. The second nut seat 35 is slidably connected to the third guide rail 38 through a third slider. The third guide rail 38 can provide a guiding function for the second nut 35 and indirectly provide a guiding function for the driving member 36 to prevent the driving member 36 from deflecting during the movement.

[0054] In an alternative embodiment, the second connecting plate 34 includes a first connecting portion 341 and a second connecting portion 342. A groove 343 is formed between the first connecting portion 341 and the second connecting portion 342. An elastic connecting member 37 is arranged in the groove 343. The driving end of the driving member 36 is connected to the elastic connecting member 37.

[0055] As Figure 3As shown, the second connecting plate 34 includes a first connecting portion 341 and a second connecting portion 342. The first connecting portion 341 and the second connecting portion 342 are spaced apart in the X direction. In the X direction, a groove 343 is formed between the first connecting portion 341 and the second connecting portion 342. An elastic connecting member 37 is disposed in the groove 343. The driving end of the driving member 36 is connected to the elastic connecting member 37, and the elastic connecting member 37 can provide a buffering effect in the Z direction for the second connecting plate 34, so as to provide a buffering effect when the second squeegee 6 contacts the screen plate.

[0056] In a preferred embodiment, there are two second guide rails 33. The two second guide rails 33 are spaced apart in the X direction. The first connecting portion 341 is slidably connected to one of the second guide rails 33 through a second slider, and the second connecting portion 342 is slidably connected to the other second guide rail 33 through a second slider, so as to improve the movement stability of the second connecting plate 34.

[0057] In an alternative embodiment, the second driving mechanism 3 further includes a grating 7. The grating 7 is disposed on the second connecting plate 34. The mounting bracket 1 is provided with a reading component 8. The reading component 8 can monitor the displacement of the second connecting plate 34 in the Z direction through the grating 7, so as to detect the displacement of the second squeegee 6 in the Z direction and accurately position the second squeegee 6.

[0058] Wherein, the reading component 8 is disposed on the mounting bracket 1 and does not need to move, so as to avoid the movement of the circuit connected to the reading component 8 and prevent the circuit from falling off the reading component 8.

[0059] In an alternative embodiment, the first connecting plate 24 includes a first end face 241, and a limiting groove 242 is formed in the first end face 241 along the X direction; the first squeegee 5 includes a limiting portion, and the limiting portion is disposed in the limiting groove 242; the first squeegee 5 is connected to the first connecting plate 24 by bolts.

[0060] As Figure 1 and Figure 3 shown, the first connecting plate 24 includes a first end face 241, and a limiting groove 242 is formed on the first end face 241. The length direction of the limiting groove 242 is the X direction, and the depth direction of the limiting groove 242 is the Y direction; the first squeegee 5 includes a limiting portion, and the limiting portion is embedded in the limiting groove 242, so as to limit the first squeegee 5 in the Z direction and prevent the first squeegee 5 from moving relative to the first connecting plate 24 in the Z direction; the first squeegee 5 is connected to the first connecting plate 24 by bolts, so that the first squeegee 5 and the first connecting plate 24 are detachably connected, which is convenient for replacing or repairing the first squeegee 5. This connection method is simple and easy to operate.

[0061] In an alternative embodiment, the second connecting plate 34 is connected to the second squeegee 6 by bolts. Thus, the second squeegee 6 and the second connecting plate 34 are detachably connected, which facilitates the replacement or repair of the second squeegee 6. This connection method is simple and easy to operate.

[0062] In an alternative embodiment, the print head further includes an adjusting member 4. The adjusting member 4 includes two limit pins 41 and an adjusting plate 42. The two limit pins 41 are spaced apart on the second connecting plate 34. One end of the adjusting plate 42 is rotatably connected to the second connecting plate 34. The adjusting plate 42 is located between the two limit pins 41. The other end of the adjusting plate 42 is connected to the second squeegee 6.

[0063] As Figure 2 and Figure 4 shown, the print head further includes an adjusting member 4. The adjusting member 4 is used to adjust the angle of the second squeegee 6 relative to the second connecting plate 34. Specifically, the adjusting member 4 includes two limit pins 41 and an adjusting plate 42. The two limit pins 41 are arranged at intervals on the second connecting plate 34. One end of the adjusting plate 42 is connected to the second connecting plate 34. The other end of the adjusting plate 42 is rotatably connected to the second squeegee 6. By relatively rotating the adjusting plate 42 and the second connecting plate 34, the angle of the second squeegee 6 relative to the second connecting plate 34 is adjusted, thereby adjusting the angle of the second squeegee 6. The adjusting plate 42 is located between the two limit pins 41, which can limit the rotation angle of the adjusting plate 42.

[0064] According to the second aspect of the embodiments of the present application, a screen printing machine is provided, including the above-mentioned print head.

[0065] Although some specific embodiments of the present application have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A printing head, characterized in that, Comprising: Mounting bracket (1); First driving mechanism (2), the first driving mechanism (2) is arranged on the mounting bracket (1), and the first driving mechanism (2) includes a first connecting plate (24); Second driving mechanism (3), the second driving mechanism (3) and the first driving mechanism (2) are arranged on the mounting bracket (1) at an interval in the X direction, and the second driving mechanism (3) includes a second connecting plate (34); First scraper (5), the first scraper (5) is detachably connected to the first connecting plate (24); Second scraper (6), the second scraper (6) is arranged at an interval in the Y direction from the first scraper (5), and the second scraper (6) is detachably connected to the second connecting plate (34).

2. The print head according to claim 1, characterized in that, A receiving space (15) is formed inside the mounting bracket (1); The first driving mechanism (2) further includes a first motor (21) and a first driving component, the first driving component is arranged in the receiving space (15), the first motor (21) is located above the receiving space (15) in the Z direction, the first connecting plate (24) is connected to the first driving component, and the first motor (21) can drive the first connecting plate (24) to move in the Z direction; The second driving mechanism (3) further includes a second motor (31) and a second driving component, the second driving component is arranged in the receiving space (15), the second motor (31) is located above the receiving space (15) in the Z direction, the second connecting plate (34) is connected to the second driving component, and the second motor (31) can drive the second connecting plate (34) to move in the Z direction.

3. The print head according to claim 2, characterized in that, The first driving component includes a first lead screw (22), a first guide rail (23) and a first nut seat (25), the first lead screw (22) is connected to the driving end of the first motor (21), the first nut seat (25) is sleeved on the first lead screw (22) and is rotatably connected to the first lead screw (22), the first guide rail (23) is arranged on the mounting bracket (1), the first connecting plate (24) is connected to the first nut seat (25), and the first connecting plate (24) is slidably connected to the first guide rail (23).

4. The print head according to claim 2, characterized in that, The second driving component includes a second lead screw (32), a second guide rail (33), a second nut seat (35) and a driving member (36), the second lead screw (32) is connected to the driving end of the second motor (31), the second nut seat (35) is sleeved on the second lead screw (32) and is rotatably connected to the second lead screw (32), the second guide rail (33) is arranged on the mounting bracket (1), the driving member (36) is connected to the second nut seat (35), the driving end of the driving member (36) is connected to the second connecting plate (34), and the second connecting plate (34) is slidably connected to the second guide rail (33).

5. The print head according to claim 4, characterized in that, The second connecting plate (34) includes a first connecting portion (341) and a second connecting portion (342). A groove (343) is formed between the first connecting portion (341) and the second connecting portion (342). An elastic connecting member (37) is disposed in the groove (343). The driving end of the driving member (36) is connected to the elastic connecting member (37).

6. The print head according to claim 1, characterized in that, The second driving mechanism (3) further includes a grating (7). The grating (7) is disposed on the second connecting plate (34). The mounting bracket (1) is provided with a reading assembly (8). The reading assembly (8) can monitor the displacement of the second connecting plate (34) in the Z direction through the grating (7).

7. The print head according to claim 1, characterized in that, The first connecting plate (24) includes a first end face (241). A limiting groove (242) is formed in the first end face (241) and is arranged in the X direction. The first squeegee (5) includes a limiting portion. The limiting portion is disposed in the limiting groove (242). The first squeegee (5) and the first connecting plate (24) are connected by bolts.

8. The print head according to claim 1, characterized in that, The second connecting plate (34) and the second squeegee (6) are connected by bolts.

9. The print head according to claim 1, characterized in that, The printing head further includes an adjusting member (4). The adjusting member (4) includes two limiting pins (41) and an adjusting plate (42). The two limiting pins (41) are spaced apart and disposed on the second connecting plate (34). One end of the adjusting plate (42) is rotatably connected to the second connecting plate (34). The adjusting plate (42) is located between the two limiting pins (41). The other end of the adjusting plate (42) is connected to the second squeegee (6).

10. A screen printing machine, characterized in that, A printing head including any one of claims 1-9.