Screen and FPC pressing and pasting equipment

Abstract

The invention relates to the technical field of screen processing, in particular to a screen and FPC pressing and pasting device which comprises a workbench, a hot pressing assembly and a winding assembly, the workbench is provided with a working area used for containing processing materials, and the hot pressing assembly comprises a driving shaft, a hot pressing head and a one-way transmission mechanism; the winding assembly comprises a new material winding wheel, a waste material winding wheel and a plurality of guide wheels. A rack is arranged on the driving shaft in the axial direction and connected with the waste winding wheel through a one-way transmission mechanism. The winding work of the driving shaft and the winding work of the isolation belt are cooperated, when the one-way transmission mechanism drives the waste winding wheel to rotate when the hot-pressing head is close to or away from the working area, the waste winding wheel winds the isolation belt, the isolation belt of the working section is replaced in the moving process of the hot-pressing head, the time for pressing and pasting a screen and an FPC at a time can be shortened, and the production efficiency is improved. And meanwhile, a replacement driving mechanism of the isolation belt is omitted, the equipment is simplified, and the production cost of the equipment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of screen processing, and in particular to a screen and FPC pressing device. Background Art

[0002] In the process of touch screen production and processing, the touch screen and FPC are pressed and formed by using conductive glue. Specifically, in the prior art, the conductive glue is generally pre-fixed on the touch screen, and then the FPC pins and the touch screen are aligned, and then the conductive glue is hot-pressed to achieve stable pressing between the touch screen and the FPC. In the process of realizing the present invention, the applicant found that in order to prevent damage to the product when hot-pressing the conductive glue, an isolation belt needs to be set between the hot pressing head and the conductive glue, but the introduction of the isolation belt increases the manufacturing cost of the equipment. Summary of the invention

[0003] The purpose of the present invention is to provide a screen and FPC pressing device to solve the above technical problems existing in the prior art, which mainly includes the following contents: The invention discloses a screen and FPC pressing device, comprising a workbench, a hot pressing component and a winding component, wherein a work area for placing processed materials is arranged on the workbench, the hot pressing component comprises a driving shaft, a hot pressing head and a one-way transmission mechanism, the output end of the driving shaft is connected with the hot pressing head, and the input end of the driving shaft is used to connect a power source, so as to realize the axial reciprocating movement of the driving shaft, so as to make the hot pressing head approach or move away from the work area; the winding component comprises a new material winding wheel, a waste material winding wheel and a plurality of guide wheels, the isolation belt wound on the new material winding wheel passes through the plurality of guide wheels in sequence and is connected with the waste material winding wheel, the plurality of guide wheels are used to change the winding path of the isolation belt, the winding path comprises a working section, the working section is located between the working area and the hot pressing head, a rack is axially arranged on the driving shaft, the rack is connected with the waste material winding wheel through the one-way transmission mechanism, and the one-way transmission mechanism is used to convert the axial movable stroke of the rack into the rotation stroke of the waste material winding wheel when the hot pressing head approaches or moves away from the work area, so as to realize the replacement of the isolation belt at the working section.

[0004] The technical solution adopted by the present invention can achieve the following beneficial effects: The drive shaft of the present invention and the winding of the isolation belt work in coordination. When the one-way transmission mechanism drives the waste winding wheel to rotate when the hot pressing head approaches or moves away from the working area, the waste winding wheel winds up the isolation belt. The isolation belt of the working section can be replaced during the movement of the hot pressing head, thereby shortening the single screen and FPC pressing time and improving the screen and FPC pressing processing efficiency. At the same time, the replacement driving mechanism of the isolation belt is eliminated, the equipment is simplified, and the equipment production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0006] Figure 1 is a schematic structural diagram of the laminating device of the present invention; Figure 2 is a schematic connection structure diagram of the hot pressing component and the winding component of the present invention; Figure 3 is a schematic structural diagram of the hot pressing component of the present invention; Figure 4 is a schematic internal structure diagram of the swinging member of the present invention; Figure 5 is a sectional view of the swinging member of the present invention; Figure 6 is a schematic structural diagram of the storage chamber of the present invention; Figure 7 is a schematic structural diagram of the one-way transmission component of the present invention; Figure 8 is an exploded view of the first gear and the second gear of the present invention; Figure 9 is an exploded view of the first gear and the second gear from another perspective of the present invention; Figure 10 is Figure 9 a partial enlarged view of part A in

[0007] In the figure: 10, workbench; 110, working area; 20, hot pressing component; 210, driving shaft; 220, rack; 230, swinging member; 240, hot pressing head; 241, connecting rod; 242, sliding rod; 243, resetting member; 250, storage chamber; 251, piston; 252, storage area; 260, comparison tube; 261, vertical section; 270, power source; 30, winding component; 310, new material winding wheel; 320, guiding wheel; 330, waste material winding wheel; 40, one-way transmission mechanism; 410, first rotating shaft; 420, first gear; 421, annular groove; 422, wedge-shaped surface; 423, abutting surface; 430, second gear; 431, limiting member; 432, elastic member; 440, gear set; 50, isolation belt; 510, working section. Detailed implementation manners

[0008] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by the present invention.

[0009] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same type, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0010] In the production and processing of touch screens, there is a process of pressing and forming the touch screen and the FPC using conductive adhesive. The principle is to pre-fix the conductive adhesive on the touch screen, then align the FPC pins with the touch screen, and then through the process of hot-pressing the conductive adhesive, to achieve stable pressing between the touch screen and the FPC; to prevent damage to the product during the hot-pressing of the conductive adhesive, an isolation tape needs to be set between the hot-pressing head and the conductive adhesive. During the hot-pressing process, the molten adhesive liquid is easily attached to the isolation tape. To avoid the isolation tape with residual conductive adhesive affecting the pressing and forming of the next touch screen and FPC, a driving mechanism needs to be added to replace the isolation tape during the gap of the hot-pressing process. However, the introduction of the driving mechanism not only complicates the equipment structure but also increases the manufacturing cost of the equipment. To solve the technical problem of high equipment preparation cost caused by the replacement of the isolation tape, the present invention provides a screen and FPC pressing device, which drives the isolation tape to be replaced orderly through the driving mechanism of the hot-pressing head, eliminating the driving mechanism for replacing the isolation tape, and at the same time integrating the replacement work of the isolation tape into the hot-pressing process. Compared with replacing the isolation tape during the gap of the hot-pressing process, the pressing efficiency of the touch screen and the FPC is effectively improved, as described in the following embodiments.

[0011] Embodiment 1 Some embodiments of this application provide a screen and FPC pressing device, as Figures 1 to 3As shown, it includes a workbench 10, a hot pressing assembly 20 and a winding assembly 30. A working area 110 for placing processing materials is provided on the workbench 10. In this embodiment, the processing materials refer to the materials on which the conductive adhesive has been fixed on the touch screen and the alignment between the FPC pins and the touch screen has been completed. The production technology for realizing the above-mentioned processing materials is the prior art and will not be elaborated here; the hot pressing assembly 20 includes a driving shaft 210, a hot pressing head 240 and a one-way transmission mechanism 40. The output end of the driving shaft 210 is connected to the hot pressing head 240, and the input end of the driving shaft 210 is used to connect to a power source 270. The power source 270 outputs kinetic energy to the driving shaft 210, driving the driving shaft 210 to reciprocate axially, and the hot pressing head 240 moves synchronously with the driving shaft 210, making the hot pressing head 240 approach or move away from the working area 110. The power source 270 is the prior art, and specifically can be a cylinder, a hydraulic cylinder, a motor, a screw drive assembly, etc., and will not be specifically limited here; the winding assembly 30 includes a new material winding wheel 310, a waste material winding wheel 330 and a plurality of guide wheels 320. The new material winding wheel 310 is a driven wheel, and the isolation belt 50 wound on the new material winding wheel 310 sequentially passes through the plurality of guide wheels 320 and is connected to the waste material winding wheel 330. The plurality of guide wheels 320 are used to change the winding path of the isolation belt 50. The winding path includes a working section 510, and the working section 510 is located between the working area 110 and the hot pressing head 240. A rack 220 is axially arranged on the driving shaft 210, and the rack 220 is connected to the waste material winding wheel 330 through a one-way transmission mechanism 40. The one-way transmission mechanism 40 is used to convert the axial movement stroke of the rack 220 into the rotation stroke of the waste material winding wheel 330 when the hot pressing head 240 approaches or moves away from the working area, so as to realize the replacement of the isolation belt 50 at the working section 510.When performing the lamination molding process on the screen and the FPC, the processing material is placed in the working area 110, and then the hot pressing head 240 is driven by the driving shaft 210 to move towards the processing material. During this process, the hot pressing head 240 first contacts the isolation belt 50 of the working section 510, and then drives the isolation belt 50 to move downward synchronously until it abuts against the processing material in place. Then the hot pressing head 240 works, and the conductive adhesive is melted through the isolation belt 50, so that the conductive adhesive is evenly distributed between the screen and the FPC. After a preset time, the hot pressing head 240 is driven by the driving shaft 210 to retract, and the lamination process of the screen and the FPC can be realized. During this process, when the one-way transmission mechanism 40 drives the waste material winding wheel 330 to rotate when the hot pressing head 240 approaches the working area 110, the waste material winding wheel 330 winds the isolation belt 50, and the isolation belt 50 of the working section 510 is replaced during the movement of the hot pressing head 240 towards the working area 110. Preferably, the complete replacement of the isolation belt 50 in the working section 510 is completed before the hot pressing head 240 contacts the isolation belt 50, so as to shorten the single lamination time of the screen and the FPC, improve the lamination processing efficiency of the screen and the FPC, and at the same time eliminate the replacement driving mechanism of the isolation belt 50, simplify the equipment, and reduce the equipment production cost.

[0012] When the one-way transmission mechanism 40 drives the waste material winding wheel 330 to rotate when the hot pressing head 240 moves away from the working area 110, the waste material winding wheel 330 winds the isolation belt 50. During the movement of the hot pressing head 240 away from the working area 110, after the lamination of the screen and the FPC is completed correspondingly, the isolation belt 50 of the working section 510 is replaced, and the separation between the isolation belt 50 and the processing material is assisted to be realized.

[0013] In some embodiments, the guide wheel 320 is a fixed pulley.

[0014] In some embodiments, under normal conditions, there is a preset gap between the isolation belt 50 of the working section 510 and the processing material in the working area 110, so that during the process of retracting the hot pressing head 240, the isolation belt 50 automatically separates from the processing material under its own tension, which is convenient for replacing the isolation belt 50 and also convenient for replacing the processing material in the working area 110.

[0015] In some embodiments, to improve the pressing and forming quality of the screen and the FPC, the device may be further provided with a swing member 230. The output end of the driving shaft 210 is rotatably connected to the swing member 230. The hot pressing head 240 is disposed at the bottom of the swing member 230. Along the direction of gravity, the center of gravity of the swing member 230 is below the rotation connection point of the driving shaft 210 and the swing member 230. The reciprocating movement of the driving shaft 210 is a reciprocating movement stroke along the direction of gravity. Based on the above structural design, when there are defects in the pre-fixing of the conductive adhesive to the touch screen and the contact between the processing material and the hot pressing head 240 is unbalanced, the swing member 230 and the driving shaft 210 cooperate to correct the contact angle between the hot pressing head 240 and the processing material, adapt to the inclination of the contact surface of the processing material caused by the defects in the pre-fixing of the conductive adhesive, so that the pressure of the driving shaft 210 can overcome the defects and be evenly conducted to the processing material. Cooperating with the subsequent heating work, the melted conductive adhesive is redistributed evenly due to the pressure difference received, thereby improving the pressing and processing quality of the product. At the same time, it avoids the stress concentration caused by the defects in the pre-fixing of the conductive adhesive, resulting in the damage of the processing material, improves the yield rate of the pressing and processing of the product, and reduces the processing loss cost.

[0016] In some embodiments, when performing the hot pressing and laminating work on the screen and the FPC, increasing the tension of the isolation belt 50 helps to improve the hot pressing and laminating processing quality. Therefore, as Figures 3 to 5 shown, it can be set that the hot pressing head 240 and the swing member 230 have a sliding stroke along the direction of gravity. The hot pressing head 240 is connected to the swing member 230 through a reset member 243. Under normal conditions, the hot pressing head 240 and the swing member 230 are at the lower limit of the sliding stroke, and the maximum distance is maintained between the hot pressing head 240 and the swing member 230. Based on the above structure, when the one-way transmission mechanism 40 drives the waste material winding wheel 330 to rotate when the hot pressing head 240 approaches the working area 110, the driving shaft 210 moves downward, and at the same time drives the waste material winding wheel 330 through the one-way transmission mechanism 40 to replace the isolation belt 50 in the working section 510. The complete replacement of the isolation belt 50 in the working section 510 is completed before the hot pressing head 240 contacts the isolation belt 50. Then, the driving shaft 210 that continues to move downward will drive the isolation belt 50 to contact the processing material through the hot pressing head 240, so that the isolation belt 50 is clamped by the hot pressing head 240 and the processing material. At the same time, since there is a sliding stroke between the hot pressing head 240 and the swing member 230, the driving shaft 210 has a certain continued downward movement stroke. During this stroke, the swing member 230 can be used to overcome the defects in the pre-fixing of the conductive adhesive, and at the same time, because the driving shaft 210 drives the waste material winding wheel 330 to continue winding, the clamped isolation belt 50 is tensioned, thereby assisting in improving the uniformity of the distribution of the melted conductive adhesive during the hot pressing process and improving the hot pressing and laminating processing quality.

[0017] In some embodiments, to detect the uniformity of the contact pressure between the hot pressing head 240 and the processing material, asFigures 2 to 6 As shown, at least two storage chambers 250 can be provided on the swing member 230. A piston 251 is provided in the storage chamber 250. Above the piston 251, a storage area 252 for filling the observation medium is provided. Below the piston 251, it is connected to the hot press head 240 through a connecting rod 241. The connecting rods 241 are symmetrically arranged on both sides of the hot press head 240. The storage area 252 is communicated with the comparison tube 260. The inner diameter of the comparison tube 260 is smaller than the inner diameter of the storage area 252. The local contact pressure between the hot press head 240 and the processed material is fed back by the observation medium. The greater the local contact pressure between the hot press head 240 and the processed material, the greater the amount of the observation medium pushed by the piston 251 into the comparison tube 260. Based on the design that the inner diameter of the comparison tube 260 is smaller than the inner diameter of the storage area 252, the observation sensitivity of the observation medium in the comparison tube 260 can be effectively improved. Preferably, the ratio of the inner diameter of the comparison tube 260 to the inner diameter of the storage area 252 is 1:2 to 20.

[0018] In some embodiments, for facilitating the comparative observation of the contact pressure between the hot press head 240 and the processed material, as Figure 6 shown, it can be set that the comparison tube 260 includes a vertical section 261 arranged along the gravity direction. The vertical sections 261 are arranged adjacent to each other. Based on the above structural design, the uniformity of the contact pressure between the hot press head 240 and the processed material can be judged by the height difference of the observation medium in the vertical section 261, and whether there is local stress concentration can be checked.

[0019] In some embodiments, for facilitating the quantitative observation of the contact pressure between the hot press head 240 and the processed material, a marking unit can be provided on the vertical section 261. The marking unit is used to assist in observing the observation medium in the vertical section; the marking unit can be a numerical value or a scale line.

[0020] In some embodiments, to avoid damage to the processed material caused by excessive local stress, it can be set that the head end of the comparison tube 260 is communicated with the storage area 252 through a connecting tube, and a pressure relief valve is provided at the tail end of the comparison tube 260. When the contact pressure between the local hot press head and the processed material is greater than the preset value, correspondingly, the contact pressure is conducted to the comparison tube 260 through the corresponding connecting rod 241 and piston 251. Correspondingly, the pressure in the comparison tube 260 is greater than the threshold value, and the pressure relief valve opens, so that the contact pressure between the hot press head 240 and the processed material at this place is released, avoiding damage to the processed material at this place due to excessive contact pressure, and providing safety redundancy for the screen and FPC laminating work.

[0021] In some embodiments, to achieve uniform transmission of power between the hot press head 240 and the swing member 230, a sliding rod 242 may be provided on the hot press head 240, and a sliding groove matching the sliding rod 242 is provided on the swing member 230. The sliding rod 242 is connected to the inner wall of the sliding groove through a reset member 243. The center of gravity of the hot press head 240, the center of gravity of the swing member 230, the sliding rod 242, and the sliding groove are arranged on the same straight line along the direction of gravity.

[0022] In some embodiments, to convert the axial movement stroke of the rack 220 into the rotational stroke of the waste reel 330 by the one-way transmission mechanism 40, as Figures 7 to 10 shown, the one-way transmission mechanism 40 may be provided to include a first rotating shaft 410. A first gear 420 that rotates coaxially is provided on the first rotating shaft 410. The first gear 420 meshes with the rack 220. A second gear 430 is rotatably sleeved on the first rotating shaft 410. A limiting member 431 is provided on one of the second gear 430 and the first gear 420. The limiting member 431 is connected to the corresponding gear through an elastic member 432. An annular groove 421 is provided on the other of the second gear 430 and the first gear 420. A plurality of engaging members are provided in the annular groove 421. The engaging members are provided with a wedge surface 422 and an abutting surface 423. The abutting surface 423 is used to abut and cooperate with the limiting member 431 to achieve synchronous rotation of the second gear 430 when the first gear 420 rotates clockwise. The wedge surface 422 is used to cooperate with the limiting member 431 to achieve unlocking of the transmission between the first gear 420 and the second gear 430 when the first gear 420 rotates clockwise. The second gear 430 is in transmission connection with the waste reel 330.

[0023] In some embodiments, to control the winding amount of the isolation belt 50 by the waste reel 330 to match the rotational stroke of the waste reel 330 driven by the rack 220, the second gear 430 may be in transmission connection with the waste reel 330 through a gear set 440; based on the above structure, to complete the complete replacement of the isolation belt 50 in the working section 510 before the hot press head 240 contacts the isolation belt 50. It should be noted that the gear set 440 is a prior art and may specifically be at least one of spur gears, helical gears, bevel gears, worm gears, and planetary gears, and no specific limitation is made here.

[0024] In some embodiments, to achieve one-way transmission of kinetic energy to the waste reel 330 by the one-way transmission mechanism 40 during the extension or contraction of the drive shaft 210, so that the waste reel 330 replaces the isolation belt 50, a rotational damping may be provided on the rotating shaft of the waste reel 330. The rotational damping is used to limit the rotation of the second gear 430 when the first gear 420 rotates clockwise and prevent the second gear 430 from rotating synchronously with the first gear 420.

[0025] In some embodiments, in order to achieve one-way transmission of kinetic energy from the one-way transmission mechanism 40 to the waste rewinding wheel 330 during the extension or contraction of the drive shaft 210, so that the waste rewinding wheel 330 replaces the isolation belt 50, the one-way transmission mechanism 40 can also be set as a ratchet structure.

[0026] In some embodiments, it is preferably set that the one-way transmission mechanism 40 is used to convert the axial movement stroke of the rack 220 into the rotation stroke of the waste rewinding wheel 330 when the hot pressing head 240 approaches the working area 110, so as to replace the isolation belt 50 before the hot pressing work is carried out, and reduce the risk of environmental pollution of the isolation belt 50.

[0027] In some embodiments, as the working time of the waste rewinding wheel 330 increases, the amount of the isolation belt 50 accumulated on the waste rewinding wheel 330 increases, and the winding radius gradually increases. To avoid an increase in the replacement amount of the isolation belt caused by the increase in the winding radius, resulting in waste of the isolation belt, it can be set that the height of the hot pressing head 240 lifted by the drive shaft 210 away from the working area 110 gradually decreases with the number of working times. Specifically, when the number of telescopic times of the drive shaft 210 reaches a preset number, the height of the drive shaft 210 contracted by one level is reduced, and the corresponding stroke of the rack 220 driving the waste rewinding wheel 330 to rotate is reduced, so as to control the replacement amount of the isolation belt 50 by the waste rewinding wheel 330 and avoid waste of the isolation belt 50 due to excessive replacement.

[0028] It should be noted that in this article, the terms "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including that element.

[0029] In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0030] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A screen and FPC pressing device, characterized in that, It includes a workbench, a hot pressing assembly, and a winding assembly. A work area for placing processing materials is provided on the workbench. The hot pressing assembly includes a driving shaft, a hot pressing head, and a one-way transmission mechanism. The output end of the driving shaft is connected to the hot pressing head, and the input end of the driving shaft is used to connect to a power source to enable the driving shaft to reciprocate axially, so that the hot pressing head approaches or moves away from the work area; the winding assembly includes a new material winding wheel, a waste material winding wheel, and a plurality of guide wheels. The isolation belt wound on the new material winding wheel sequentially passes through the plurality of guide wheels and is connected to the waste material winding wheel. The plurality of guide wheels are used to change the winding path of the isolation belt. The winding path includes a working section, and the working section is located between the work area and the hot pressing head. A rack is axially provided on the driving shaft, and the rack is connected to the waste material winding wheel through a one-way transmission mechanism. The one-way transmission mechanism is used to convert the axial movement stroke of the rack into the rotation stroke of the waste material winding wheel when the hot pressing head approaches or moves away from the work area, so as to realize the replacement of the isolation belt at the working section.

2. The screen and FPC laminating device according to claim 1, characterized in that, The device further includes a swinging member. The output end of the driving shaft is rotatably connected to the swinging member. The hot pressing head is arranged at the bottom of the swinging member. Along the direction of gravity, the center of gravity of the swinging member is below the rotational connection point of the driving shaft and the swinging member. The reciprocating movement of the driving shaft is a reciprocating movement stroke along the direction of gravity.

3. The screen and FPC laminating device according to claim 2, wherein The hot pressing head and the swinging member have a sliding stroke along the direction of gravity. The hot pressing head is connected to the swinging member through a reset member. Under normal conditions, the hot pressing head and the swinging member are at the lower limit of the sliding stroke, and the maximum distance is maintained between the hot pressing head and the swinging member.

4. A screen and FPC pressing device according to claim 2 or 3, characterized in that, At least two storage chambers are provided on the swinging member. A piston is arranged in the storage chamber. A storage area for filling an observation medium is provided above the piston. The piston is connected to the hot pressing head through a connecting rod below. The connecting rods are symmetrically arranged on both sides of the hot pressing head. The storage area is communicated with a comparison tube, and the diameter of the comparison tube is smaller than the inner diameter of the storage area.

5. The screen and FPC laminating device according to claim 4, wherein, The comparison tube includes a vertical section arranged along the direction of gravity, and the vertical sections are arranged adjacent to each other.

6. The screen and FPC laminating device according to claim 5, characterized in that, A marking unit is arranged on the vertical section, and the marking unit is used to assist in observing the observation medium in the vertical section; And / or, the head end of the comparison tube is communicated with the storage area through a connecting tube, and a pressure relief valve is arranged at the tail end of the comparison tube.

7. The screen and FPC laminating device according to claim 4, characterized in that A sliding rod is arranged on the hot pressing head, and a sliding groove matching the sliding rod is arranged on the swinging member. The sliding rod is connected to the inner wall of the sliding groove through a reset member. The center of gravity of the hot pressing head, the center of gravity of the swinging member, the sliding rod, and the sliding groove are arranged on the same straight line along the direction of gravity.

8. A screen and FPC laminating device according to any one of claims 1 to 3, characterized in that, The one-way transmission mechanism includes a first rotating shaft, on which a first gear rotating coaxially is provided. The first gear meshes with a rack. A second gear is rotatably sleeved on the first rotating shaft. A limiting member is provided on one of the second gear and the first gear, and the limiting member is connected to the corresponding gear through an elastic member. An annular groove is provided on the other of the second gear and the first gear, and a plurality of engaging members are arranged in the annular groove. The engaging member is provided with a wedge surface and an abutting surface. The abutting surface is used to cooperate with the limiting member to enable the second gear to rotate synchronously when the first gear rotates clockwise. The wedge surface is used to cooperate with the limiting member to unlock the transmission between the first gear and the second gear when the first gear rotates clockwise. The second gear is in transmission connection with a waste material winding wheel.

9. A screen and FPC laminating device according to claim 8, characterized in that The second gear is in transmission connection with the waste material winding wheel through a gear set; and / or, a rotational damping is provided on the rotating shaft of the waste material winding wheel, and the rotational damping is used to limit the rotation of the second gear when the first gear rotates clockwise.

10. A screen and FPC laminating device according to any one of claims 1 to 3, characterized in that, The one-way transmission mechanism is used to convert the axial movement stroke of the rack into the rotational stroke of the waste material winding wheel when the hot press head approaches the working area; and / or, the height of the hot press head lifted by the driving shaft away from the working area gradually decreases with the number of working times.

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