CN215735071U

CN215735071U - Plate pressing device

Info

Publication number: CN215735071U
Application number: CN202122370261.0U
Authority: CN
Inventors: 肖燕青; 曾振军; 陈海巍; 王方江; 王翰文
Original assignee: Jiangsu Yingsu Integrated Circuit Equipment Co ltd
Current assignee: Jiangsu Yingsu Integrated Circuit Equipment Co ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-02-01
Anticipated expiration: 2031-09-28

Abstract

The utility model relates to a pressing plate device, and belongs to the technical field of circuit board production. The pressure plate device comprises a workbench, a fixed pressure plate structure assembly and a movable pressure plate structure assembly; the fixed pressing plate structure assembly is arranged at the front end of the workbench and the position of the fixed pressing plate structure assembly is fixed relative to the workbench; the movable pressing plate structure component is arranged at the rear end of the workbench and is parallel to the fixed pressing plate structure component, the movable pressing plate structure component is connected with the workbench through a guide rail group arranged on the workbench, and the movable pressing plate structure component can automatically move back and forth along the workbench according to the dimension and specification of the PCB. According to the plate pressing device, the plate pressing structure is additionally arranged on the workbench of the photoetching machine, so that the phenomena of tilting and bulging of the edge and four corners of a PCB in the photoetching process are avoided, and the problem that the plate pressing structure possibly shields or interferes with marking points on the PCB after the PCB is pressed downwards in photoetching of PCBs with different sizes is solved.

Description

Plate pressing device

Technical Field

The utility model relates to a pressing plate device, and belongs to the technical field of circuit board production.

Background

In the photoetching process of the PCB, the working table top of the photoetching machine fixes the PCB in a negative pressure adsorption mode. However, because the PCB has a large size and some boards have a small thickness (less than 0.5 mm), the edges or four corners of the boards are prone to be warped or protruded during transportation or transportation. Moreover, due to the composition characteristics of some PCB plates, the phenomenon of unevenness such as warping and protrusion of the edge or four corners of the plate exists, such as single-sided copper-clad plate, two-sided copper-clad plate with different thicknesses, and the like. In the photoetching process, after the PCB is adsorbed by a workbench of a photoetching machine, the phenomena of unevenness such as tilting and protrusion of the edge or four corners of the PCB are easy to occur, and the PCB is scrapped in the photoetching process.

In addition, the phenomena of different sizes and specifications, different marking point positions and the like often exist among different batches of PCB plates, so that when a single fixed plate pressing structure is used, the problem that the pressing position cannot be reasonably adjusted according to the different sizes of the PCB plates exists; the pressing position cannot be adjusted according to the marking point positions of different batches of PCB plates, and the method is particularly important in photoetching of inner-layer PCB plates; therefore, interference or even shielding is caused to the grabbing of the plate marking points in the photoetching process.

SUMMERY OF THE UTILITY MODEL

[ problem ] to

According to the plate pressing device, the plate pressing structure is additionally arranged on the workbench of the photoetching machine, so that the phenomena of tilting and bulging of the edge and four corners of a PCB in the photoetching process are avoided, and the problem that the plate pressing structure possibly shields or interferes with marking points on the PCB after the PCB is pressed downwards in photoetching of PCBs with different sizes is solved.

[ solution ]

The utility model provides a pressing plate device which comprises a workbench (1), a fixed pressing plate structure component (2) and a movable pressing plate structure component (3); the fixed pressing plate structure assembly (2) is arranged at the front end of the workbench (1), and the fixed pressing plate structure assembly (2) is fixed with the workbench (1) through a bolt fastener; the movable pressing plate structure component (3) is arranged at the rear end of the workbench (1) and is parallel to the fixed pressing plate structure component (2), the movable pressing plate structure component (3) is connected with the workbench (1) through a guide rail set (3.11) arranged on the workbench (1), and can automatically move back and forth along the workbench (1) according to the dimension and specification of the PCB.

In one embodiment, a rotating shaft a (2.6) is disposed on the fixed platen structure assembly (2), a plurality of first press finger assemblies (2.7) are disposed on the rotating shaft a (2.6), and the plurality of first press finger assemblies (2.7) can move axially along the rotating shaft a (2.6). The first pressing finger assemblies (2.7) are used for adjusting the positions of the first pressing finger assemblies (2.7) according to the sizes of the PCB when the PCB with different sizes and specifications is subjected to photoetching, so that the PCB can be well pressed down, and grabbing of the mark positioning used in the photoetching process of the PCB is not influenced.

In one embodiment, in particular, during the photoetching process of the inner-layer PCB, when the PCB completes one-side photoetching and turns over to photoetch the other side, the mark point is located on the exposed surface of the PCB, and if the mark point is just shielded by the first finger pressing component (2.7), the point position grabbing in the photoetching process is easily affected.

In one embodiment, each of the plurality of first pressure finger assemblies (2.7) is provided with a first pressure finger body (2.71), the first pressure finger bodies (2.71) can be sleeved on the rotating shaft A (2.6), and locking screws (2.72) arranged on the first pressure finger bodies (2.71) can lock the positions of the first pressure finger assemblies (2.7) on the rotating shaft A (2.6) after the first pressure finger assemblies (2.7) are adjusted in place. The variable pressure finger (2.73) is fixed on the first pressure finger main body (2.71), the length of the variable pressure finger (2.73) can be changed according to the tilting and protruding degree of the PCB which needs to be pressed down and the position of the mark point of the PCB from the edge of the PCB, and the structure can also be changed according to different forms of the first elastic pressing block (2.74) arranged on the variable pressure finger. The first elastic pressing block (2.74) can be made of elastic materials such as polyurethane, rubber and the like, or can be designed into a structure with elasticity such as a spring, an elastic sheet and the like.

In one embodiment, a dotting mark (1.3) and a lower graduated scale (1.2) for photoetching a PCB (printed circuit board) are arranged at the front end of a workbench (1), a left graduated scale (1.4) is arranged on the left side of the workbench (1), the dotting mark (1.3) and the lower graduated scale (1.2) are both positioned at the front end of the workbench (1), and the lower graduated scale (1.2) is positioned on one side close to the edge of the workbench (1) (as shown in FIG. 3); the lower graduated scale (1.2) is fastened and fixed on the workbench (1) through bolts, and the dotting marks (1.3) can be circular mark holes.

In one embodiment, the dotting mark (1.3) and the lower graduated scale (1.2) are used for observing and calibrating the positions of the first pressure finger assemblies (2.7) when the fixed pressure plate structure assembly (2) is pressed down, and preventing the first pressure finger assemblies (2.7) from shielding the dotting mark position when pressed down to influence normal photoetching production.

In one embodiment, the left scale (1.4) is used for observing and checking whether the position of the movable pressure plate structure assembly (3) is consistent with the size of pressing the PCB when the movable pressure plate structure assembly (3) is pressed down, preventing the PCB from being pressed too much, affecting normal photoetching production, and failing to meet the photoetching production requirement when the PCB is pressed too little.

In one embodiment, a first driving fixing plate (2.1) is arranged on the fixed pressing plate structure assembly (2), a first pushing driving mechanism (2.2) is arranged on the first driving fixing plate (2.1), and the driving mechanism can use different types of rotating cylinders and different types of motors to realize the rotating pushing process of the whole mechanism.

In one embodiment, the first push-down drive (2.2) is connected to the drive wheel a (2.3) and drives the rotary shaft wheel a (2.5) via the drive belt a (2.4). The transmission mode can not be limited to various belt type transmission, and the rotary power can be realized by using transmission modes such as chains, magnetic wheels and the like. The rotating shaft wheel A (2.5) is connected with the rotating shaft A (2.6), and the rotating shaft A (2.6) can be square, rectangular or round shaft notch type, etc.

In one embodiment, a shaft support (2.8) is provided at the other end of the rotational axis a (2.6). And the first fixed driving plate (2.1) and the shaft supporting piece (2.8) are respectively fastened and fixed with the workbench (1) through bolts.

In one embodiment, a second driving fixing plate (3.12) and a connecting plate (3.17) are installed on a guide rail set (3.11) of the workbench (1), and a reinforcing connecting rod (3.3) is arranged between the second driving fixing plate (3.12) and the connecting plate (3.17), so that the movable pressure plate structure assembly (3) is guaranteed to be parallel to the fixed pressure plate structure assembly (2) after the movable pressure plate structure assembly (3) is adjusted in position due to the fact that the width of the workbench (1) is large. And a second pushing driving mechanism (3.13) is arranged on the second driving fixing plate (3.12), and the second pushing driving mechanism (3.13) can use different types of rotary cylinders and different types of motors to realize the rotary pushing process of the whole mechanism.

In one embodiment, the second press driving mechanism (3.13) is connected with a transmission wheel B (3.14), and drives a rotating shaft wheel B (3.16) through a transmission belt B (3.15); the transmission mode can not be limited to various belt type transmission, and the rotary power can be realized by using transmission modes such as chains, magnetic wheels and the like. The rotating shaft wheel B (3.16) is connected with the rotating shaft B (3.2), and the rotating shaft B (3.2) is designed with a notch. A plurality of second pressure finger assemblies (3.4) are arranged at the notches of the rotating shaft B (3.2). Position indication sheets (3.5) are arranged on the connecting plates (3.17) and can indicate size data on the left graduated scale (1.4), so that when the movable pressure plate structure component (3) is conveniently observed and corrected to be pressed down, whether the position of the movable pressure plate structure component (3) is consistent with the size for pressing the PCB plate or not is judged. A driving shaft (3.6) is arranged below the workbench (1) and is connected with a second driving fixing plate (3.12) through a connecting plate (3.17), so that the driving shaft (3.6) can drive the whole movable pressure plate structure assembly (3) to move according to the size of the PCB plate to change the position of the pressure plate. The drive shaft (3.6) may be an electric cylinder, a linear module, or a motor driven drive shaft.

In an implementation mode, the second pressing finger assemblies (3.4) are provided with second pressing finger main bodies (3.41), the second pressing finger main bodies (3.41) can be set to be L-shaped or straight, the second pressing finger main bodies (3.41) can press the tilting and protruding degrees of the PCB as required, the length of the marking point of the PCB can be changed according to the position of the marking point of the PCB away from the edge of the PCB, and the structure of the second pressing finger assemblies can be changed according to different forms of the second elastic pressing blocks (3.42) installed on the second pressing finger main bodies. The second elastic pressing block (3.42) can be made of elastic materials such as polyurethane and rubber, or can be designed into a structure with elasticity such as a spring and an elastic sheet.

[ advantageous effects ]

According to the pressing plate device, the dotting mark (1.3) and the lower graduated scale (1.2) can be arranged at the front end of the workbench (1), and the left graduated scale (1.4) is arranged on the left side of the workbench (1), so that when the fixed pressing plate structure assembly (2) and the movable pressing plate structure assembly (3) are pressed downwards, whether the positions of the fixed pressing plate structure assembly (2) and the movable pressing plate structure assembly (3) are consistent with the size for pressing the PCB can be observed and corrected, the phenomenon that the normal photoetching production is influenced due to the fact that the PCB is pressed too much is prevented, and when the PCB is pressed too little, the photoetching production requirement cannot be met.

The pressing plate device can be provided with a plurality of first pressing finger assemblies (2.7), and when the PCB plates with different dimensions are subjected to photoetching, the position of each first pressing finger assembly (2.7) is adjusted according to the dimension of the PCB plate, so that the PCB plate can be well pressed down, and grabbing of marking and positioning of the PCB plate in the photoetching process cannot be influenced.

The pressing plate device can be provided with a plurality of second pressing finger assemblies (3.4), and the connecting plate (3.17) is provided with the position indicating sheet (3.5) which can indicate the size data on the left graduated scale (1.4), so that whether the position of the movable pressing plate structure assembly (3) is consistent with the size of the pressed PCB plate or not can be conveniently observed and corrected when the movable pressing plate structure assembly (3) is pressed downwards.

In the plate pressing device, the plurality of second pressing finger assemblies (3.4) are respectively provided with a second pressing finger main body (3.41), the second pressing finger main bodies (3.41) can be arranged in an L shape or a straight shape, the second pressing finger main bodies (3.41) can change the length according to the tilting and protruding degree of a PCB required to be pressed and the position of a mark point of the PCB away from the edge of the PCB, and the structure can also be changed according to different forms of the second elastic pressing blocks (3.42) arranged on the second pressing finger main bodies.

Drawings

FIG. 1 is a schematic view of a platen assembly according to the present invention, with the platen structure assembly in an open position;

FIG. 2 is a schematic view of a platen assembly in a depressed state according to the present invention;

FIG. 3 is a schematic diagram of the general structure of a platen assembly, a work platform, according to the present invention;

FIG. 4 is a schematic view of the general structure of a platen assembly for holding platen structure assemblies in accordance with the present invention;

FIG. 5 is a schematic diagram of the general structure of a first pressing finger assembly of the platen device according to the present invention;

FIG. 6 is a schematic view of the overall structure of a movable platen structure assembly of the platen apparatus according to the present invention;

FIG. 7 is a front view of a movable platen structure assembly in accordance with the platen apparatus of the present invention;

FIG. 8 is a schematic view of the overall structure of a second pressing finger assembly of the platen device according to the present invention;

description of reference numerals: 1-a workbench; 2-fixing the platen structure assembly; 3-a movable platen structure assembly; 1.2-lower graduated scale; 1.3-dotting mark; 1.4-left scale; 2.1-driving the first fixing plate; 2.2-pressing driving mechanism I, 2.3-driving wheel A; 2.4-drive belt A; 2.5-rotating arbor wheel A; 2.6-rotation axis A, 2.7-first pressure finger component; 2.71-pressing the first finger body; 2.72-locking screw; 2.73-variable pressure finger; 2.74-elastic pressing block one; 2.8-shaft support; 3.11-guide rail set; 3.12-driving the second fixing plate; 3.13-pressing the driving mechanism two; 3.14-driving wheel B; 3.15-drive belt B; 3.16 rotating arbor wheel B; 3.17-connecting plate; 3.2-rotation axis B; 3.3-reinforcing connecting rods; 3.4-pressing the finger assembly II; 3.5-position indicating sheet; 3.6-drive shaft; 3.41-pressing the second finger body; 3.42-elastic pressing block two.

Detailed Description

In order to achieve the above objects, features and advantages and to make the utility model more comprehensible, the present invention is described in detail with reference to the following embodiments.

Example one

The present embodiment provides a platen apparatus, wherein the lower left corner of the PCB board in the direction shown in fig. 1 is the origin during photolithography.

As shown in fig. 1 and 2, the platen device of the present embodiment includes: the device comprises a workbench 1, a fixed pressing plate structure component 2 and a movable pressing plate structure component 3; the fixed pressing plate structure component 2 is arranged at the front end of the workbench 1, and the position of the fixed pressing plate structure component 2 is fixed relative to the workbench 1; the movable pressing plate structure component 3 is arranged at the rear end of the workbench 1 and is parallel to the fixed pressing plate structure component 2, the movable pressing plate structure component 3 is connected with the workbench 1 through a guide rail set 3.11 arranged on the workbench 1, and the movable pressing plate structure component can automatically move back and forth along the workbench 1 according to the dimension and specification of the PCB.

Fig. 3 is a schematic diagram of the overall structure of the work platform. As shown in fig. 3, the front end of the workbench 1 is provided with a dotting mark 1.3 and a lower graduated scale 1.2 when the PCB is photoetched, the left side of the workbench 1 is provided with a left graduated scale 1.4, the dotting mark 1.3 and the lower graduated scale 1.2 are both located at the front end of the workbench 1, and the lower graduated scale 1.2 is shown in fig. 3 at the side close to the edge of the workbench 1; the lower graduated scale 1.2 is fastened and fixed on the workbench 1 through bolts, and the dotting marks 1.3 can be circular marking holes.

The dotting mark 1.3 and the lower graduated scale 1.2 are used for observing and correcting the positions of the plurality of pressure finger assemblies I2.7 when the fixed pressure plate structure assembly 2 is pressed down, and preventing the pressure finger assemblies I2.7 from shielding the dotting mark position when pressed down to influence normal photoetching production.

The left graduated scale 1.4 is used for observing and checking whether the position of the movable pressure plate structure component 3 is consistent with the dimension of pressing the PCB when the movable pressure plate structure component 3 is pressed down, so as to prevent the PCB from being pressed too much to influence normal photoetching production, and when the PCB is pressed too little, the photoetching production requirement cannot be met.

As shown in fig. 4, a rotating shaft a2.6 is disposed on the fixed platen structure assembly 2, a plurality of first press finger assemblies 2.7 are disposed on the rotating shaft a2.6, the plurality of first press finger assemblies 2.7 can move along the axial direction of the rotating shaft a2.6, and a shaft support 2.8 is disposed at the other end of the rotating shaft a 2.6; the shaft support 2.8 is fixed to the table 1 by means of a screw fastening.

When PCB plates with different dimensions are photoetched, the position of each pressure finger component 2.7 can be adjusted according to the dimension of the PCB plate, so that the PCB plate can be well pressed down, and grabbing of the PCB plate for marking positioning in the photoetching process can not be influenced. Particularly, in the photoetching process of the inner-layer PCB, when the PCB completes one-side photoetching and turns over to perform photoetching on the other side, the mark point is positioned on the exposure surface of the PCB, and if the mark point is just shielded by the first 2.7 pressing finger assembly, the point position grabbing in the photoetching process is easily influenced.

As shown in fig. 4, a first driving fixing plate 2.1 is disposed on the first fixing pressing plate structure assembly 2, and a first downward pressing driving mechanism 2.2 is disposed on the first driving fixing plate 2.1, and the driving mechanism may use different types of rotating cylinders and different types of motors to implement a rotating downward pressing process of the whole mechanism. The first fixed driving plate 2.1 is fixed with the workbench (1) through a bolt fastener. The first press driving mechanism 2.2 is connected with the driving wheel A2.3 and drives the rotating shaft wheel A2.5 through a driving belt A2.4. The transmission mode can not be limited to various belt type transmission, and the rotary power can be realized by using transmission modes such as chains, magnetic wheels and the like. The rotating shaft wheel A2.5 is connected with a rotating shaft A2.6, and the rotating shaft A2.6 can be square, rectangular or round shaft notch type, etc.

As shown in fig. 5, each of the plurality of first pressure finger assemblies 2.7 is provided with a first pressure finger body 2.71, the first pressure finger bodies 2.71 can be sleeved on the rotating shaft a2.6, and the locking screws 2.72 arranged on the first pressure finger bodies 2.71 can lock the positions of the first pressure finger assemblies 2.7 on the rotating shaft a2.6 after the first pressure finger assemblies 2.7 are adjusted in place. The variable pressure fingers 2.73 are fixed on the first pressure finger bodies 2.71, the length of the variable pressure fingers 2.73 can be changed according to the tilting and protruding degrees of the PCB which needs to be pressed downwards and the position of the mark point of the PCB, which is far away from the edge of the PCB, and the structure of the variable pressure fingers can also be changed according to different forms of the elastic pressing blocks 2.74 which are arranged on the variable pressure fingers. The first elastic pressing block 2.74 can be made of elastic materials such as polyurethane and rubber, or can be designed into a structure with elasticity such as a spring and a spring sheet.

As shown in fig. 6 and 7, the movable platen structure assembly 3 is connected to the table 1 via a guide rail set 3.11 mounted on the table 1. Install two 3.12 of drive fixed plate and connecting plate 3.17 on guide rail group 3.11, be provided with reinforcing connecting rod 3.3 between two 3.12 of drive fixed plate and the connecting plate 3.17, because of workstation 1 width is great, design reinforcing connecting rod 3.3 is in order to guarantee that activity clamp plate structure subassembly 3 is behind the adjusting position, guarantees the parallel with fixed clamp plate structure subassembly 2. And a second pressing driving mechanism 3.13 is arranged on the second driving fixing plate 3.12, and the driving mechanism can use different types of rotary cylinders and different types of motors to realize the rotary pressing process of the whole mechanism. The second press driving mechanism 3.13 is connected with the transmission wheel B3.14 and drives the rotating shaft wheel B3.16 through the transmission belt B3.15. The transmission mode can not be limited to various belt type transmission, and the rotary power can be realized by using transmission modes such as chains, magnetic wheels and the like. The rotating shaft wheel B3.16 is connected with the rotating shaft B3.2, and a notch is designed on the rotating shaft B3.2. A plurality of second pressure finger assemblies 3.4 are arranged at the notches of the rotating shaft B3.2. The position indication sheet 3.5 is arranged on the connecting plate 3.17, and can indicate the size data on the left graduated scale 1.4, so that when the movable pressing plate structure component 3 is pressed down, the movable pressing plate structure component 3 is observed and corrected conveniently, and whether the position of the movable pressing plate structure component 3 is consistent with the size for pressing the PCB plate or not is judged. The driving shaft 3.6 is arranged under the workbench 1 and is connected with the second driving fixing plate 3.12 through the connecting plate 3.17, so that the driving shaft 3.6 can drive the whole movable pressing plate structure assembly 3 to move according to the size of the PCB to change the position of the pressing plate. The drive shaft 3.6 may use an electric cylinder, a linear module, or a drive shaft driven by a motor.

As shown in fig. 8, the second finger pressing assembly 3.4 is provided with a second finger pressing main body 3.41, the second finger pressing main body 3.41 can be designed into an L shape or a straight shape, the second finger pressing main body 3.41 can change the length according to the tilting and protruding degree of the PCB required to be pressed down and the position of the mark point of the PCB from the edge of the PCB, and can also change the structure according to the different forms of the second elastic pressing block 3.42 installed on the second finger pressing main body. The second elastic pressing block 3.42 can be made of elastic materials such as polyurethane and rubber, or can be designed into a structure with elasticity such as a spring and a spring sheet.

The scope of the present invention is not limited to the above embodiments, and any modifications, equivalent substitutions, improvements, etc. that can be made by those skilled in the art within the spirit and principle of the inventive concept should be included in the scope of the present invention.

Claims

1. The pressing plate device is characterized by comprising a workbench (1), a fixed pressing plate structure component (2) and a movable pressing plate structure component (3); the fixed pressing plate structure assembly (2) is arranged at the front end of the workbench (1), and the fixed pressing plate structure assembly (2) is fixedly connected with the workbench (1); the movable pressing plate structure component (3) is arranged at the rear end of the workbench (1) and is parallel to the fixed pressing plate structure component (2), the movable pressing plate structure component (3) is connected with the workbench (1) through a guide rail group (3.11) installed on the workbench (1) and can automatically move back and forth along the workbench (1) according to the size specification of a PCB, a rotating shaft A (2.6) is arranged on the fixed pressing plate structure component (2), a plurality of first pressing finger components (2.7) are arranged on the rotating shaft A (2.6), and the plurality of first pressing finger components (2.7) can axially move along the rotating shaft A (2.6).

2. The press plate device as claimed in claim 1, wherein the plurality of first press finger assemblies (2.7) are used for adjusting the position of each first press finger assembly (2.7) according to the size of the PCB when the PCB with different sizes is photoetched, so that the PCB can be well pressed down, and the grabbing of the mark positioning used by the PCB in the photoetching process is not influenced.

3. A platen device according to claim 1, characterized in that the rotation axis a (2.6) can be square, rectangular or round.

4. A platen device according to claim 1, wherein a plurality of said first press finger assemblies (2.7) are each provided with a first press finger body (2.71), said first press finger bodies (2.71) being capable of being fitted over said rotation axis a (2.6); and a locking screw (2.72) is arranged on the first pressure finger main body (2.71) and used for locking the position of the first pressure finger assembly (2.7) on the rotating shaft A (2.6) after the first pressure finger assembly (2.7) is adjusted to the right position.

5. The pressure plate device as claimed in claim 4, wherein a plurality of the pressure finger main bodies (2.71) are all fixed with variable pressure fingers (2.73), the variable pressure fingers (2.73) can change length according to the tilting and protruding degree of a PCB required to be pressed downwards and the position of a marking point of the PCB from the edge of the PCB, and can also change structure according to different forms of elastic pressure blocks (2.74) arranged on the variable pressure fingers; the first elastic pressing block (2.74) can use elastic materials, or be designed into a spring or a shrapnel with an elastic structure.

6. The platen device according to claim 1, wherein the front end of the workbench (1) is further provided with a dotting mark (1.3) and a lower graduated scale (1.2) for photoetching a PCB (printed circuit board), and the dotting mark is used for observing and calibrating the positions of the first pressing finger assemblies (2.7) when the fixed platen structure assembly (2) is pressed down, so that the positions of the dotting mark are prevented from being blocked when the first pressing finger assemblies (2.7) are pressed down, and normal photoetching production is prevented from being influenced.

7. A platen device according to claim 1, wherein a left scale (1.4) is provided on the left side of the table (1) for observing and checking whether the position of the movable platen structure assembly (3) is consistent with the dimension of pressing the PCB plate when the movable platen structure assembly (3) is pressed down, preventing the PCB plate from being pressed too much to affect the normal photolithography production, and when the PCB plate is pressed too little, the photolithography production requirement cannot be reached.

8. The platen device according to claim 1, wherein the movable platen structure assembly (3) is provided with a second driving fixing plate (3.12) and a connecting plate (3.17), and a reinforcing connecting rod (3.3) is arranged between the second driving fixing plate (3.12) and the connecting plate (3.17) to ensure that the movable platen structure assembly (3) is parallel to the fixed platen structure assembly (2) after the position adjustment.

9. A platen device according to claim 8, characterized in that the movable platen structure assembly (3) is provided with a rotating shaft B (3.2), and the rotating shaft B (3.2) is provided with a notch; a plurality of second pressure finger assemblies (3.4) are arranged at the notches of the rotating shaft B (3.2).

10. The platen device according to claim 9, wherein each of the plurality of second press finger assemblies (3.4) is provided with a second press finger main body (3.41), the second press finger main bodies (3.41) can be arranged in an L shape or a straight shape, the second press finger main bodies (3.41) can change the length according to the tilting and protruding degree of the PCB to be pressed and the position of the mark point of the PCB from the edge of the PCB, and can also change the structure according to the different forms of the second elastic press blocks (3.42) mounted thereon; the second elastic pressing block (3.42) can be made of elastic materials or be designed into a spring or a shrapnel with an elastic structure.