Multi-material top surface coplanar adjusting mechanism suitable for different thicknesses and printing device

Abstract

The invention discloses a multi-material top surface coplanar adjusting mechanism suitable for different thicknesses and a printing device. The coplanar adjusting mechanism comprises a datum plate, a driving mechanism, a pressing plate, a driver and a height-adjustable suction cup. The datum plate is provided with a datum plane, the driving mechanism is connected with the pressing plate and used for driving the pressing plate to abut against the datum plane or to be separated from the datum plate, an open hole penetrating downwards is formed in the middle of the datum plane, and the driver is connected with the height-adjustable suction cup and used for driving the height-adjustable suction cup to move up and down at the open hole; the height-adjustable suction cup comprises a base and a plurality of elastic ejector pins, the elastic ejector pins have the tendency of bouncing upwards relative to the base, adsorption holes are formed in the top faces of the elastic ejector pins, and the height-adjustable suction cup further comprises a limiting structure which is connected to the base and used for locking or unlocking the positions of all the elastic ejector pins. The problem of how to adjust the top surfaces of a plurality of materials to be coplanar so that the materials with different thicknesses can be reliably printed is mainly solved.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-material automated operations, and in particular to a top surface coplanarity adjustment mechanism and a printing device suitable for multi-materials with different thicknesses. Background Art

[0002] In order to improve the production efficiency of materials, current automation devices need to process multiple materials at the same time. Taking printing devices in the printing field as an example, current printing devices can only print multiple materials of the same thickness. When the thickness tolerance of multiple materials is large or the thickness difference is large, the top surfaces of multiple materials are bound to be uneven, that is, the top surfaces of multiple materials are not coplanar, which makes the printing actuator unable to complete the printing of multiple materials with higher quality requirements.

[0003] Therefore, it is necessary to improve the existing technology. Summary of the invention

[0004] The present invention provides a coplanar adjustment mechanism for top surfaces of multiple materials with different thicknesses and a printing device, which mainly solves the technical problem of how to adjust the top surfaces of multiple materials to be coplanar so that multiple materials with different thicknesses can be reliably printed.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A coplanar adjustment mechanism for the top surfaces of multiple materials with different thicknesses, comprising a reference plate, a driving mechanism, a pressing plate, a driver and a height-adjustable suction cup;

[0007] The top surface of the reference plate is the reference surface, the driving mechanism is connected to the pressing plate and is used to drive the bottom surface of the pressing plate to abut against or evacuate the reference plate, an opening penetrating downward is provided in the middle of the reference surface, and the driver is connected to the height-adjustable suction cup and is used to drive the height-adjustable suction cup to move up and down at the opening;

[0008] The height-adjustable suction cup includes a base and a plurality of elastic ejector pins connected to the base, each of the elastic ejector pins protrudes upward relative to the base and has a tendency to bounce upward, and the top surface of the elastic ejector pin is provided with an adsorption hole for adsorbing a corresponding material. The height-adjustable suction cup also includes a limiting structure connected to the base and used to lock or unlock the position of all the elastic ejector pins relative to the base.

[0009] In one of the technical solutions, the limiting structure includes a plurality of limiting components, each of which is elastically abutted against the base and connected one-to-one with each of the elastic ejector pins, and each of the limiting components is used to lock or unlock the position of a corresponding elastic ejector pin.

[0010] In one of the technical solutions, the limit assembly includes a first elastic member and a locking pin, a plurality of sliding holes extending laterally are provided in the base, each of the locking pins is accommodated in a corresponding sliding hole and can slide along the sliding hole, a through hole penetrating in the up-down direction is provided in the locking pin, each of the elastic ejector pins is inserted into the through hole corresponding to a locking pin, a positive pressure airway connecting all the sliding holes is provided on the base, the positive pressure airway is used for gas to enter and push all the locking pins to laterally lock the corresponding elastic ejector pin, the first elastic member is provided at one end of the locking pin away from the positive pressure airway and is used to apply an elastic force to the locking pin for unlocking the elastic ejector pin.

[0011] In one of the technical solutions, the height-adjustable suction cup includes two rows of elastic ejector pins and two rows of limit assemblies, and the positive-pressure airway is arranged between the two rows of limit assemblies. When all the locking pins unlock the elastic ejector pins under the elastic force of the first elastic member, the ends of the two rows of locking pins facing away from the first elastic member are pressed against each other in pairs, and a notch structure is provided at the ends of all the locking pins facing away from the first elastic member, and the notch structure is part of the positive-pressure airway.

[0012] In one of the technical solutions, a plurality of mounting holes are provided in the base, the bottom end of each of the elastic ejector pins is accommodated in a corresponding mounting hole, a second elastic member is provided in the mounting hole, and the elastic ejector pin has an upward movement tendency relative to the base due to the second elastic member, the adsorption hole penetrates downward through the elastic ejector pin to connect the adsorption hole with the mounting hole, and a negative pressure air duct is further provided in the base below the mounting hole, and the negative pressure air duct connects the plurality of mounting holes.

[0013] In one of the technical solutions, the top surface coplanarity adjustment mechanism for multiple materials with different thicknesses adopts the following adjustment method:

[0014] First, the driving mechanism drives the pressing plate to press on the reference surface of the reference plate, and then the carrier with multiple materials is moved to the bottom of the reference plate and above the height-adjustable suction cup. Then, the driver drives the height-adjustable suction cup to rise, and multiple elastic ejectors on the height-adjustable suction cup lift and adsorb the corresponding materials until multiple materials are against the bottom surface of the pressing plate. Then, the positions of all the elastic ejectors are locked by the limiting structure, and finally, the driving mechanism drives the pressing plate to withdraw from the reference plate.

[0015] In one of the technical solutions, the top surface coplanarity adjustment mechanism for multiple materials with different thicknesses adopts the following adjustment method:

[0016] First, a carrier with multiple materials is moved to the bottom of the reference plate and above the height-adjustable suction cup, and then the driver drives the height-adjustable suction cup to rise, and multiple elastic ejectors on the height-adjustable suction cup lift and adsorb the corresponding materials until all the materials are lifted by the elastic ejectors to be higher than the reference surface, and then the driving mechanism drives the pressing plate downward to gradually approach the reference surface, and the pressing plate presses down all the materials until the bottom surface of the pressing plate abuts against the reference surface, and then the positions of all the elastic ejectors are locked by the limiting structure, and finally the driving mechanism drives the pressing plate to withdraw from the reference plate.

[0017] The present application also provides a printing device, including a printing actuator and the above-mentioned coplanar adjustment mechanism for the top surfaces of multiple materials with different thicknesses, wherein the printing actuator is located above the reference plate and is used to perform printing operations on multiple substrates located on a carrier, and when the pressing plate is driven by the driving mechanism to withdraw from the reference surface, the pressing plate is not located above the reference plate.

[0018] In one of the technical solutions, the printing device further includes a lifting mechanism, which is connected to the printing actuator and is used to drive the printing actuator to move in a vertical direction;

[0019] Alternatively, the lifting mechanism is connected to the driver and the reference plate and is used to simultaneously drive the driver, the height-adjustable suction cup and the reference plate to move in a vertical direction.

[0020] In one of the technical solutions, the driving mechanism includes a cylinder, a connecting rod assembly and a tension spring, the connecting rod assembly is connected to the pressure plate, the cylinder and the tension spring are both connected to the connecting rod assembly, the cylinder drives the pressure plate to press against the reference surface through the connecting rod assembly and applies an oblique downward pressure to the reference surface, and the tension spring drives the pressure plate to evacuate the reference plate through the connecting rod assembly.

[0021] Compared with the prior art, the coplanar adjustment mechanism for top surfaces of multiple materials with different thicknesses provided by the present invention has at least the following beneficial effects:

[0022] This solution uses the top surface of the reference plate as the reference surface. When working, the pressing plate can be pre-pressed on the reference surface, and then the driver drives the height-adjustable suction cup to rise, so that the multiple elastic ejectors of the height-adjustable suction cup adsorb multiple materials one by one and press them against the bottom surface of the pressing plate. When the driving mechanism drives the pressing plate to withdraw from the reference plate, even if the thickness errors of the multiple materials are large or the thickness difference is large, the top surfaces of the multiple materials will eventually be coplanar with the reference surface of the reference plate. Even if the thicknesses of the subsequent multiple materials are different, the top surfaces can still be reliably printed by the printing actuator above. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a top surface coplanarity adjustment mechanism for multiple materials with different thicknesses provided in an embodiment of the present application when the pressing plate is in the initial position;

[0025] Figure 2 for Figure 1 a top view of the structure shown;

[0026] Figure 3 A schematic diagram of the structure of a top surface coplanar adjustment mechanism for multiple materials of different thicknesses provided in an embodiment of the present application when a pressing plate is pressed on the top surface of a reference plate and multiple materials are against the bottom surface of the pressing plate;

[0027] Figure 4 for Figure 3 The schematic diagram of the structure shown is after the pressure plate is evacuated;

[0028] Figure 5 A schematic diagram of the structure of a height-adjustable suction cup provided in an embodiment of the present application;

[0029] Figure 6 A top view of a height-adjustable suction cup provided in an embodiment of the present application;

[0030] Figure 7 for Figure 6 Sectional view at AA in the middle;

[0031] Figure 8 for Figure 7 A partial enlarged view of point B in the middle;

[0032] Fig. 9 for Figure 1 A partial enlarged view of point A in the middle.

[0033] Reference numerals:

[0034] 1. Reference plate; 11. Reference surface; 12. Opening;

[0035] 2. Driving mechanism; 21. Cylinder; 22. Connecting rod assembly; 23. Extension spring;

[0036] 3. Press plate; 4. Driver;

[0037] 5. Height-adjustable suction cup; 51. Base; 511. Sliding hole; 512. Positive pressure airway; 513. Mounting hole; 514. Negative pressure airway; 52. Elastic ejector pin; 521. Adsorption hole; 53. Limiting structure; 531. Limiting assembly; 5311. First elastic member; 5312. Locking pin; 53121. Through hole; 53122. Notch structure; 54. Second elastic member;

[0038] 8. Conveying mechanism; 9. Materials. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0041] It should be understood that the orientations or positional relationships indicated by terms such as "upper", "lower", "top", "bottom", "inside", and "outside" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0044] Please also read Figures 1 to 5The embodiment of the present invention provides a coplanar adjustment mechanism for the top surfaces of multiple materials with different thicknesses, which mainly includes a reference plate 1, a driving mechanism 2, a pressing plate 3, a driver 4 and a height-adjustable suction cup 5. The top surface of the reference plate 1 is a reference surface 11, the driving mechanism 2 is connected to the pressing plate 3, the driving mechanism 2 is used to drive the pressing plate 3 to lean against the reference surface 11 or withdraw from the reference plate 1, the middle of the reference surface 11 is provided with an opening 12 penetrating downward, the height-adjustable suction cup 5 is located below the reference plate 1 and facing the opening 12 in the initial position, the driver 4 is connected to the height-adjustable suction cup 5 and is used to drive the height-adjustable suction cup 5 to move up and down at a position facing the opening 12. The height-adjustable suction cup 5 specifically includes a base 51 and a plurality of elastic ejector pins 52. The plurality of elastic ejector pins 52 are elastically connected to the base 51 and protrude upward. The plurality of elastic ejector pins 52 have a tendency to bounce upward relative to the base 51. The base 51 is connected to the driver 4. When the driver 4 drives the base 51 to move in the up-down direction, the plurality of elastic ejector pins 52 move in the up-down direction together with the base 51. The top surfaces of all the elastic ejector pins 52 are provided with adsorption holes 521. Each elastic ejector pin 52 adsorbs a corresponding material 9 through the adsorption hole 521. In addition, the height-adjustable suction cup 5 also includes a limiting structure 53 connected to the base 51, and the limiting structure 53 is used to lock or unlock the positions of all elastic ejector pins 52 relative to the base 51. When all elastic ejector pins 52 are locked in position by the limiting structure 53, all elastic ejector pins 52 cannot move up and down relative to the base 51. When all elastic ejector pins 52 are not locked in position by the limiting structure 53, all elastic ejector pins 52 can move up and down relative to the base 51.

[0045] The following paragraph provides a first adjustment method of the top surface coplanar adjustment mechanism of multiple materials with different thicknesses in the present solution:

[0046] First, the driving mechanism 2 drives the pressing plate 3 to press on the reference surface 11 of the reference plate 1, and then the carrier with multiple materials 9 is moved to the bottom of the reference plate 1 and above the height-adjustable suction cup 5, and then the driver 4 drives the height-adjustable suction cup 5 to rise. During the rising process of the height-adjustable suction cup 5, multiple elastic ejectors 52 lift and adsorb the corresponding materials 9 until the multiple materials 9 are against the bottom surface of the pressing plate 3, and then the position of all the elastic ejectors 52 is locked by the limiting structure 53, and finally the driving mechanism 2 drives the pressing plate 3 to withdraw from the reference plate 1. At this time, the top surfaces of the multiple materials 9 will be coplanar with the reference surface 11 of the reference plate 1.

[0047] The following paragraph provides a second adjustment method for the top surface coplanar adjustment mechanism of multiple materials with different thicknesses in the present solution:

[0048] First, the carrier with multiple materials 9 is moved to the bottom of the reference plate 1 and above the height-adjustable suction cup 5, and then the driver 4 drives the height-adjustable suction cup 5 to rise. During the rising process of the height-adjustable suction cup 5, multiple elastic ejectors 52 lift and adsorb the corresponding materials 9 until all materials 9 are lifted by the elastic ejectors 52 to be higher than the reference surface 11, and then the driving mechanism 2 drives the pressing plate 3 downward to gradually approach the reference surface 11, and the pressing plate 3 presses all materials 9 until the bottom surface of the pressing plate 3 rests on the reference surface 11, and then the position of all elastic ejectors 52 is locked by the limiting structure 53, and finally the driving mechanism 2 drives the pressing plate 3 to withdraw from the reference plate 1, at which time the top surfaces of the multiple materials 9 will be coplanar with the reference surface 11 of the reference plate 1.

[0049] It is additionally explained here that when the pressure plate 3 is pressed on the reference surface 11 of the reference plate 1, the force applied to the reference surface 11 is vertically downward, and the above two adjustment methods can be applied one by one; when the pressure plate 3 is pressed on the reference surface 11 of the reference plate 1, the force applied to the reference surface 11 is inclined downward, then the first adjustment method is preferably used instead of the second adjustment method, because when the pressure plate 3 applies pressure to the material 9 in an inclined downward posture and has not yet abutted against the reference surface 11, multiple materials 9 may be deformed by the pressure plate 3 or even cause the materials 9 to be separated from the adsorption of the corresponding elastic ejector pins 52. Therefore, when the pressure plate 3 is pressed on the reference surface 11 of the reference plate 1, the force applied to the reference surface 11 is inclined downward, it is necessary to press the pressure plate 3 against the reference surface 11 of the reference plate 1, and then let multiple materials 9 abut upward against the bottom surface of the pressure plate 3, so that the materials 9 will not be deformed by the pressure plate 3, and the materials 9 will not fall off the elastic ejector pins 52.

[0050] Specifically, since this embodiment is preferably applied in the field of printing, there will be a printing actuator (not shown in the figure) above the reference plate 1. The printing actuator needs to move downward to be able to print multiple materials 9, or the multiple materials 9 and the reference plate 1 need to move upward together so that the printing actuator can print multiple materials 9. In order to ensure that the driving mechanism 2 and the pressure plate 3 do not interfere with the printing actuator, and to save costs, please refer to Figure 1 and Fig. 9The driving mechanism 2 used in this solution specifically includes a cylinder 21, a connecting rod assembly 22 and a tension spring 23. The connecting rod assembly 22 is connected to the pressing plate 3. The cylinder 21 and the tension spring 23 are both connected to the connecting rod assembly 22. The cylinder 21 pushes the pressing plate 3 against the reference surface 11 of the reference plate 1 through the connecting rod assembly 22 and applies an oblique downward pressure to the reference surface 11. When the cylinder 21 is depressurized, the tension spring 23 pulls the pressing plate 3 outward to evacuate the reference plate 1 through the connecting rod assembly 22. With this driving mechanism 2, the function of the pressing plate 3 evacuating the reference plate 1 without interfering with the printing operation of the printing actuator is realized. Only one cylinder 21 is used for the execution power, so it has the advantage of low cost. However, the pressing plate 3 acts on the reference surface 11 in an oblique downward manner. Therefore, when using this driving mechanism 2, it is preferred to only apply the first adjustment method mentioned above.

[0051] Please also read Figures 5 to 8 The above-mentioned limiting structure 53 specifically includes a plurality of limiting components 531, each limiting component 531 is elastically abutted against the base 51 and is connected to each elastic ejector pin 52 in a one-to-one correspondence, and each limiting component 531 is used to lock or unlock the position corresponding to a corresponding elastic ejector pin 52. By designing the limiting structure 53 to be a plurality of limiting components 531 with the same number as the elastic ejector pins 52, it is conducive to more reliably achieving the purpose of locking all the elastic ejector pins 52. Specifically, each limit assembly 531 specifically includes a first elastic member 5311 and a locking pin 5312. A plurality of sliding holes 511 extending laterally are provided in the base 51. Each locking pin 5312 is accommodated in a corresponding sliding hole 511 and can slide along the sliding hole 511. A through hole 53121 penetrating in the up-down direction is provided on the locking pin 5312. Each elastic ejector pin 52 is inserted into a through hole 53121 corresponding to a locking pin 5312. A positive pressure airway 512 connecting all the sliding holes 511 is provided on the base 51. When the positive pressure airway 512 is passed through After the gas is introduced, the gas in the positive pressure airway 512 will push all the locking pins 5312 to move laterally and lock a corresponding elastic ejector pin 52, so as to realize the function of locking all the elastic ejector pins 52, and the first elastic member 5311 is arranged at one end of the locking pin 5312 away from the positive pressure airway 512. The first elastic member 5311 is preferably a spring. When the gas in the positive pressure airway 512 is depressurized, the first elastic member 5311 pushes the locking pin 5312 to move, so that the locking pin 5312 unlocks the elastic ejector pin 52, and the unlocked elastic ejector pin 52 can move in the up and down directions.

[0052] Please read again Figures 5 to 8A plurality of mounting holes 513 are provided in the base 51, and the bottom end of each elastic ejector pin 52 is received in a corresponding mounting hole 513. A second elastic member 54 is provided in the mounting hole 513, and the second elastic member 54 is also preferably a spring. The second elastic member 54 is respectively against the base 51 and the elastic ejector pin 52, and the elastic ejector pin 52 has a tendency to bounce upward relative to the base 51 due to the elastic force of the second elastic member 54. In addition, the adsorption hole 521 penetrates downward through the elastic ejector pin 52 so that the adsorption hole 521 can be connected with the mounting hole 513, and a negative pressure airway 514 is provided in the base 51 below the mounting hole 513. The negative pressure airway 514 is connected to multiple mounting holes 513 at the same time, that is, the adsorption holes 521 of multiple elastic ejector pins 52 are downwardly connected to the negative pressure airway 514. When air is pumped into the negative pressure airway 514, negative pressure can be formed in the adsorption holes 521 of the multiple elastic ejector pins 52, so as to realize the function that the multiple elastic ejector pins 52 can adsorb the corresponding material 9.

[0053] Please read again Figures 5 to 8 The height-adjustable suction cup 5 preferably includes two rows of elastic ejector pins 52, correspondingly includes two rows of limiter components 531, and preferably has two negative pressure air passages 514, wherein one negative pressure air passage 514 enables one row of elastic ejector pins 52 to absorb the material 9, and the other negative pressure air passage 514 enables the other row of elastic ejector pins 52 to absorb the material 9, and the above-mentioned positive pressure air passage 512 is arranged between the two rows of limiter components 531, when all the locking pins 5312 unlock the elastic ejector pins 52 under the elastic force of the first elastic member 5311, the two rows of locking pins The ends of 5312 facing away from the first elastic member 5311 are preferably designed to abut against each other to limit the initial position of the locking pin 5312, and all the locking pins 5312 are provided with a notch structure 53122 at one end facing away from the first elastic member 5311, and all the notch structures 53122 are part of the positive pressure airway 512, so that the positive pressure airway 512 can be connected to all the sliding holes 511, that is, when gas is introduced into the positive pressure airway 512, all the locking pins 5312 can laterally lock the positions of all the elastic ejector pins 52.

[0054] This embodiment also provides a printing device, which includes a printing actuator (not shown in the figure) and the above-mentioned coplanar adjustment mechanism for the top surfaces of multiple materials with different thicknesses. The printing actuator is located above the reference plate 1 and is used to perform printing operations on multiple materials 9 (the materials 9 are actually substrates at this time) located on the carrier. In addition, the printing device also includes a lifting mechanism (not shown in the figure). When the lifting mechanism is connected to the printing actuator, the lifting mechanism is used to drive the printing actuator to move downward and approach the multiple materials 9 downward, so that the printing actuator can perform printing operations on the multiple materials 9. When the lifting mechanism is connected to the driver 4 and the reference plate 1 at the same time, the lifting mechanism is used to drive the multiple materials 9 and the reference plate 1 to move upward together and approach the printing actuator upward, so that the printing actuator can perform printing operations on the multiple materials 9. In order to ensure that the driving mechanism 2 and the pressure plate 3 will not interfere with the printing actuator, when the pressure plate 3 is driven by the driving mechanism 2 to withdraw from the reference plate 1, the pressure plate 3 will not be located above the reference plate 1, so that multiple materials 9 can move upward or the printing actuator can move downward without interfering with the pressure plate 3, thereby enabling the printing actuator to perform printing operations on multiple materials 9.

[0055] See also Figure 1 The printing device of this embodiment also includes a conveying mechanism 8, which is used to convey a carrier loaded with multiple materials 9 to automatically drive the carrier with multiple materials 9 to be transported to the bottom of the reference plate 1. When the multiple materials 9 are printed and placed back on the carrier, the conveying mechanism 8 is also used to continue conveying the carrier to unload the printed multiple materials 9 to the designated position.

[0056] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementations of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A coplanar adjustment mechanism for top surfaces of multiple materials with different thicknesses, characterized in that: It includes a reference plate, a driving mechanism, a pressing plate, a driver and a height-adjustable suction cup; The top surface of the reference plate is the reference surface, the driving mechanism is connected to the pressing plate and is used to drive the pressing plate to abut against or evacuate the reference plate, an opening penetrating downward is provided in the middle of the reference surface, and the driver is connected to the height-adjustable suction cup and is used to drive the height-adjustable suction cup to move up and down at the opening; The height-adjustable suction cup includes a base and a plurality of elastic ejectors connected to the base, the base is connected to the driver, each of the elastic ejectors protrudes upward relative to the base and has a tendency to bounce upward, the top surface of the elastic ejector is provided with an adsorption hole for adsorbing a corresponding material, and the height-adjustable suction cup also includes a limiting structure connected to the base and used to lock or unlock the position of all the elastic ejectors relative to the base.

2. The top surface coplanarity adjustment mechanism for multiple materials with different thicknesses as claimed in claim 1, characterized in that: The limiting structure includes a plurality of limiting components, each of which elastically abuts against the base and is connected to each of the elastic ejector pins in a one-to-one correspondence, and each of the limiting components is used to lock or unlock the position of a corresponding elastic ejector pin.

3. The top surface coplanarity adjustment mechanism for multiple materials with different thicknesses as claimed in claim 2, characterized in that: The limiting assembly includes a first elastic member and a locking pin, the base is provided with a plurality of sliding holes extending laterally, each of the locking pins is accommodated in a corresponding sliding hole and can slide along the sliding hole, the locking pin is provided with a through hole penetrating in the up-down direction, each of the elastic ejector pins is penetrated in the through hole corresponding to a locking pin, the base is provided with a positive pressure airway connecting all the sliding holes, the positive pressure airway is used for gas to enter and push all the locking pins to laterally lock the corresponding elastic ejector pin, the first elastic member is provided at one end of the locking pin away from the positive pressure airway and is used to apply an elastic force to the locking pin for unlocking the elastic ejector pin.

4. The top surface coplanarity adjustment mechanism for multiple materials with different thicknesses as claimed in claim 3, characterized in that: The height-adjustable suction cup includes two rows of elastic ejector pins and two rows of limit assemblies. The positive-pressure airway is arranged between the two rows of limit assemblies. When all the locking pins unlock the elastic ejector pins under the elastic force of the first elastic member, the ends of the two rows of locking pins facing away from the first elastic member are pressed against each other in pairs, and the ends of all the locking pins facing away from the first elastic member are provided with a notch structure, and the notch structure is a part of the positive-pressure airway.

5. The top surface coplanarity adjustment mechanism for multiple materials with different thicknesses as claimed in claim 1, characterized in that: A plurality of mounting holes are provided in the base, the bottom end of each of the elastic ejector pins is received in a corresponding mounting hole, a second elastic member is provided in the mounting hole, and the elastic ejector pin has a tendency to bounce upward relative to the base due to the elastic force of the second elastic member, the adsorption hole penetrates downward through the elastic ejector pin to connect the adsorption hole with the mounting hole, and a negative pressure airway is further provided in the base, and the negative pressure airway connects the plurality of mounting holes.

6. The top surface coplanarity adjustment mechanism for multiple materials with different thicknesses as claimed in claim 1, characterized in that: The top surface coplanarity adjustment mechanism for multiple materials with different thicknesses adopts the following adjustment method: First, the driving mechanism drives the pressing plate to press on the reference surface of the reference plate, and then the carrier with multiple materials is moved to the bottom of the reference plate and above the height-adjustable suction cup. Then, the driver drives the height-adjustable suction cup to rise, and multiple elastic ejectors on the height-adjustable suction cup lift and adsorb the corresponding materials until multiple materials are against the bottom surface of the pressing plate. Then, the positions of all the elastic ejectors are locked by the limiting structure, and finally, the driving mechanism drives the pressing plate to withdraw from the reference plate.

7. The top surface coplanarity adjustment mechanism for multiple materials with different thicknesses as claimed in claim 1, characterized in that: The top surface coplanarity adjustment mechanism for multiple materials with different thicknesses adopts the following adjustment method: First, a carrier with multiple materials is moved to the bottom of the reference plate and above the height-adjustable suction cup, and then the driver drives the height-adjustable suction cup to rise, and multiple elastic ejectors on the height-adjustable suction cup lift and adsorb the corresponding materials until all the materials are lifted by the elastic ejectors to be higher than the reference surface, and then the driving mechanism drives the pressing plate downward to gradually approach the reference surface, and the pressing plate presses down all the materials until the bottom surface of the pressing plate abuts against the reference surface, and then the positions of all the elastic ejectors are locked by the limiting structure, and finally the driving mechanism drives the pressing plate to withdraw from the reference plate.

8. A printing device, characterized in that: It comprises a printing actuator and a top surface coplanar adjustment mechanism for multiple materials of different thicknesses as described in any one of claims 1 to 7, wherein the printing actuator is located above the reference plate and is used to perform printing operations on multiple materials located on a carrier, and when the pressing plate is driven by the driving mechanism to withdraw from the reference surface, the pressing plate is not located above the reference plate.

9. The printing device according to claim 8, characterized in that The printing device further comprises a lifting mechanism, which is connected to the printing actuator and is used to drive the printing actuator to move in a vertical direction; Alternatively, the lifting mechanism is connected to the driver and the reference plate and is used to simultaneously drive the driver, the height-adjustable suction cup and the reference plate to move in a vertical direction.

10. The printing device according to claim 8, characterized in that The printing device adopts the coplanar adjustment mechanism for the top surfaces of multiple materials with different thicknesses as described in claim 6, and the driving mechanism includes a cylinder, a connecting rod assembly and a tension spring. The connecting rod assembly is connected to the pressure plate, and the cylinder and the tension spring are both connected to the connecting rod assembly. The cylinder drives the pressure plate to press against the reference surface and applies oblique downward pressure to the reference surface through the connecting rod assembly, and the tension spring drives the pressure plate to evacuate the reference plate through the connecting rod assembly.

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