A silk-screen pre-take-and-place device for spherical curved lenses

Abstract

The utility model relates to glass processing technical field especially is related to a silk screen printing before taking and placing device for spherical curved surface lens. The traditional silk screen printing before taking and placing device will place lens vertically to clean generally, but if vertical placement is used for spherical curved surface lens, water mark will be left on the concave surface of lens after cleaning, and the subsequent silk screen printing quality is influenced. The silk screen printing before taking and placing device for spherical curved surface lens provided by the utility model forms the first lens placing position that can place spherical curved surface lens obliquely through setting inclined groove and horizontal groove on the cross bar, so that the spherical curved surface lens will not leave water mark after cleaning, and the quality of subsequent silk screen printing is greatly improved by using the adjustable suction head angle of suction pen and the fixing base that can extract vacuum and fix the lens.

Description

Technical Field

[0001] This utility model relates to the field of glass processing technology, and in particular to a screen printing pre-loading device for spherical curved surface lenses. Background Technology

[0002] Watches typically use flat lenses. The edge of the flat lens facing the dial extends slightly downwards, making the dial-facing side concave and the side away from the dial convex. For aesthetic purposes, screen printing is often required around the concave edge of the lens. The screen printing process for flat lenses is as follows: the lens is placed vertically on a storage rack for cleaning; a suction pen is used to pick up the lens, focusing on the center of the concave side; the lens is then flipped over, convex side down, and placed on a screen printing base for printing. However, with consumers' pursuit of individuality, spherical curved lenses have emerged. But due to the unique shape of spherical curved lenses, the handling devices and techniques used for flat lenses are not suitable. For example, when a spherical curved lens is placed on a traditional storage rack for cleaning, water accumulates on the concave side, leaving watermarks after drying, which significantly affects the quality of subsequent screen printing. Furthermore, the suction pen tip cannot pick up the concave side of a spherical curved lens, nor can it conform to the convex side of all spherical curved lenses, making the picking up of spherical curved lenses extremely difficult. The above situation greatly affects the screen printing efficiency of spherical curved lenses, so there is an urgent need for a new screen printing pre-loading device for spherical curved lenses. Utility Model Content

[0003] Based on this, it is necessary to address the above-mentioned shortcomings by providing a screen printing pre-loading and unloading device for spherical curved lenses, comprising: an operating table, a storage rack disposed on the operating table, a fixed base disposed on the operating table, and a suction pen. The storage rack comprises: two opposing support plates and a plurality of horizontal bars clamped between the two support plates and parallel to each other. The two ends of the horizontal bars are respectively connected to the support plates. A first plane is defined parallel to the upper surface of the operating table, and a second plane is defined parallel between the first plane and the upper surface of the operating table. The horizontal bars include an upper horizontal bar located on the first plane and a lower horizontal bar located on the second plane. Every two adjacent upper horizontal bars and a lower horizontal bar whose projection is located between them form a lens placement slot. In each lens placement slot, a plurality of inclined grooves are formed on the opposing surfaces of the two upper horizontal bars, and a plurality of horizontal grooves are formed on the upper surface of the lower horizontal bar. The two opposing inclined grooves and the horizontal grooves in the extension direction of the inclined grooves form a first lens placement position. The first lens placement position is used to tilt and place spherical curved lenses.

[0004] Preferably, the inclined grooves and transverse grooves are evenly spaced along the extension direction of the transverse bar to form a plurality of evenly arranged first lens placement positions.

[0005] Preferably, the two support plates are provided with a plurality of sliding grooves, and the two ends of the crossbar are respectively slidably disposed in the sliding grooves opposite to each other. The crossbar can move between the two support plates to form a lens placement groove and a first lens placement position adapted to spherical curved surface lenses of different sizes.

[0006] Preferably, the upper surface of the fixed base is provided with a hollow boss with a horseshoe-shaped horizontal cross-section. The inner circle of the upper surface of the boss is recessed downward to form a second lens placement position. The surface of the second lens placement position is in contact with the convex surface of the spherical curved lens. The second lens placement position is used to hold the convex-facing spherical curved lens.

[0007] Preferably, the portion of the upper surface of the fixed base located on the side of the opening in the sidewall of the boss is recessed downward to form a first clearance.

[0008] Preferably, the boss has screw holes on both sides, and the fixed base is fixed to the operating table by screws passing through the screw holes.

[0009] Preferably, the second lens placement position is provided with a plurality of first vacuum holes at intervals, and the first vacuum holes are connected to an external vacuum device.

[0010] Preferably, the suction pen includes: a handle, a connecting tube connected to the handle at one end, and a suction head disposed at the other end of the connecting tube. The suction head is in contact with the convex surface of the spherical curved lens. A second vacuum hole communicating with the connecting tube is opened in the center of the suction head. The second vacuum hole is connected to an external vacuuming device through the connecting tube. The diameter of the suction head is smaller than the width of the opening on the side of the protrusion.

[0011] Preferably, the bottom of the suction head is provided with a sleeve portion, and the suction head is detachably sleeved on the top end of the connecting tube through the sleeve portion. The suction pen includes suction heads with sleeve portions having different tilt angles.

[0012] Preferably, the suction head is made of a flexible material.

[0013] The aforementioned screen printing pre-loading device for spherical curved lenses has an upper crossbar and a lower crossbar between two opposing support plates. Slanted grooves and horizontal grooves are formed on the upper and lower crossbars to create a lens placement slot and a first lens placement position. By tilting the spherical curved lens into the first lens placement position, watermarks are prevented from remaining on the lens after cleaning. Subsequently, an adjustable suction head pen is used to transfer the spherical curved lens to a fixed base for screen printing, greatly improving the quality of the screen printing. Attached Figure Description

[0014] Figure 1This is a three-dimensional structural diagram of a storage rack for a screen printing pre-retrieval device for spherical curved lenses in one embodiment of the present invention.

[0015] Figure 2 This is a side view of a storage rack for a screen printing pre-loading and unloading device for spherical curved lenses according to one embodiment of the present invention.

[0016] Figure 3 This is a top view of a storage rack for a screen printing pre-loading device for spherical curved lenses according to one embodiment of the present invention.

[0017] Figure 4 This is a three-dimensional structural diagram of the fixed base of the screen printing pre-loading and loading device for spherical curved surface lenses in one embodiment of the present invention.

[0018] Figure 5 This is a diagram illustrating the state of a screen printing pre-loading device for spherical curved lenses in one embodiment of the present invention, showing the use of a suction pen to transfer the spherical curved lens to a fixed base.

[0019] Figure 6 This is a three-dimensional structural diagram of the suction pen of the screen printing pre-receiving device for spherical curved lenses in one embodiment of the present invention.

[0020] Explanation of reference numerals in the attached drawings: 100-storage rack, 100a-lens placement slot, 100b-first lens placement position, 110-support plate, 110a-slide groove, 120-crossbar, 121-upper crossbar, 121a-sloping groove, 122-lower crossbar, 122a-horizontal groove, 200-fixed base, 200a-first clearance, 200b-bolt hole, 210-protrusion, 210a-second lens placement position, 210b-first vacuum hole, 300-suction pen, 310-handle, 320-suction head, 320a-second vacuum hole, 321-sleeve part, 330-connecting tube. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] This utility model discloses a screen printing pre-loading device for spherical curved surface lenses, such as... Figures 1-6As shown, it includes: an operating table (not shown in the figure), a storage rack 100 on the operating table, a fixed base 200 on the operating table, and a pen 300. The storage rack 100 includes: two opposing support plates 110 and several horizontal bars 120 clamped between the two support plates 110 and parallel to each other. The support plates 110 are fixed to the upper surface of the operating table to prevent the storage rack 100 from accidentally falling and damaging the lenses; or it can be placed on the operating table without being connected to the upper surface of the operating table, so that spherical curved lenses can be transferred in batches together with the storage rack 100, which can save the overall process time. The two ends of the crossbar 120 are respectively connected to the opposite surfaces of the two support plates 110. Two planes are defined to clearly describe the positional information of the crossbar 120. The first plane is defined as parallel to the upper surface of the operating table, and the second plane is defined as located between the first plane and the upper surface of the operating table, and is parallel to both the first plane and the upper surface of the operating table. Several crossbars 120 are divided into two parts: one part is horizontally placed on the first plane as the upper crossbar 121, and the other part is horizontally placed on the second plane as the lower crossbar 122. Every two adjacent upper crossbars 121 and one lower crossbar 122 whose projection on the upper surface of the operating table is located between them form a lens placement slot 100a. In the lens placement slot 100a, the two upper crossbars 121 have several inclined slots 121a on their opposite surfaces for placing spherical curved lenses. In this embodiment, the angle of the inclined slots 121a is 45°. The lower crossbar 122 has a horizontal slot 122a for placing spherical curved lenses. The two opposing inclined slots 121a and the horizontal slot 122a in the extension direction of the inclined slots 121a form a first lens placement position 100b. The first lens placement position 100b is used to place spherical curved lenses at an angle. At this time, the convex surface of the spherical curved lens faces obliquely upward. When cleaning, water will flow down the curved surface of the lens, and no watermarks will be left on the lens after drying.

[0023] The process of using the screen printing pre-loading device for spherical curved lenses provided by this utility model is as follows:

[0024] Step S1: Take the spherical curved lens and insert it at a 45° angle with the concave side facing down into the first lens placement position 100b of the storage rack 100;

[0025] Step S2: After the storage rack 100 is filled with spherical curved surface lenses, the storage rack 100 filled with spherical curved surface lenses is transferred sequentially to the ultrasonic cleaning tank, the drying tank, and the air drying tank to obtain clean spherical curved surface lenses without watermarks.

[0026] Step S3: Randomly check the cleanliness of the products and transfer the storage rack 100 containing the spherical curved surface lenses with qualified cleanliness to the operating table.

[0027] Step S4: Use the suction pen 300 to pick up the convex surface of the spherical curved lens and pull the spherical curved lens out of the storage rack 100;

[0028] Step S5: Use the suction pen 300 to transfer the spherical curved lens to the top of the fixed base 200, and at the same time flip the spherical curved lens so that the convex side of the spherical curved lens is placed on the fixed base 200 with the convex side facing down.

[0029] Step S6: Turn on the vacuum equipment to fix the spherical curved surface lens on the fixed base 200;

[0030] Step S7: Turn on the screen printing equipment and perform screen printing;

[0031] Step S8: After screen printing is completed, turn off the vacuum equipment and use the suction pen 300 to transfer the screen-printed spherical curved lens onto the baking tray.

[0032] Step S9: Transfer the baking tray filled with the screen-printed spherical curved lens into the baking oven for baking and cooling, and then proceed to the next step.

[0033] The present invention provides a screen printing pre-loading device for spherical curved lenses. The storage rack 100 forms several lens placement slots 100a through two layers of crossbars 120. An inclined groove 121a is opened on the upper crossbar 121, and a horizontal groove 122a is opened on the lower crossbar 122. The two inclined grooves 121a and one horizontal groove 122a form a first lens placement position 100b. The inclined grooves ensure that when the lens 121a is placed into the first lens placement position 100b, the convex surface is facing upwards and the entire lens is inserted into the first lens placement position 100b at an overall tilt. When the spherical curved lens is placed in the first lens placement position 100b in this form, no water marks will be left on the surface after cleaning and drying. This solves the problem in the prior art where vertical storage of spherical curved lenses leaves water marks that affect subsequent screen printing, thus improving the quality of subsequent screen printing.

[0034] To maximize the utilization of the storage rack 100, in one embodiment, such as Figures 1-3 As shown, the inclined slots 121a on the upper crossbar 121 and the horizontal slots 122a on the lower crossbar 122 are arranged evenly and at intervals along the extension direction of their respective crossbars 120. The spacing between the inclined slots 121a on the upper crossbar 121 is the same as the spacing between the horizontal slots 122a on the lower crossbar 122. This structure forms several evenly arranged first lens placement positions 100b on the lens placement slot 100a. The even arrangement allows for more placement positions to be set on a unit length of crossbar 120, thereby increasing the capacity of the storage rack 100 through density optimization, effectively reducing the replacement frequency of the storage rack 100, and lowering logistics turnover costs.

[0035] To accommodate spherical curved lenses of different sizes, in one embodiment, such as Figure 1As shown, the two support plates 110 of the storage rack 100 are provided with a number of sliding grooves 110a. The sliding grooves 110a on different support plates 110 correspond to each other. The two ends of each crossbar 120 (including the upper crossbar 121 and the lower crossbar 122) are slidably disposed in a pair of opposing sliding grooves 110a. The crossbar 120 moves between the two support plates 110 to form a lens placement groove 100a and a first lens placement position 100b that are adapted to spherical curved surface lenses of different sizes. When the lens diameter increases, the lower horizontal bar 122 slides downward and the upper horizontal bar 121 slides upward to increase the height of the lens placement slot 100a and the first lens placement position 100b. Simultaneously, the distance between the two inclined slots 121a and the distance between the inclined slot 121a and the horizontal slot 122a are adjusted to ensure the spherical curved lens fits snugly against the first lens placement position 100b. When the lens diameter decreases, the lower horizontal bar 122 slides upward and the upper horizontal bar 121 slides downward to decrease the height of the lens placement slot 100a and the first lens placement position 100b. Simultaneously, the distance between the two inclined slots 121a and the distance between the inclined slot 121a and the horizontal slot 122a are adjusted to ensure the spherical curved lens fits snugly against the first lens placement position 100b. This structure enables the storage rack 100 to accommodate spherical curved lenses of different sizes. The core advantage lies in utilizing the degree of freedom of the mechanical structure to dynamically match the physical parameters of the lenses, thereby improving the versatility and reliability of the device.

[0036] In one embodiment, such as Figure 4 , Figure 5 As shown, the fixed base 200 is fixed to the operating table. The upper surface of the fixed base 200 has a protruding boss 210 with a hollow center and a horseshoe-shaped horizontal cross-section. The inner circle (horseshoe inner circle) of the upper surface of the boss 210 is recessed downwards to form a second lens placement position 210a. The surface of the second lens placement position 210a is in contact with the convex surface of the spherical curved lens. The second lens placement position 210a is used to hold the convex-facing spherical curved lens. The opening direction of the horseshoe-shaped structure facilitates the placement and removal of the lens by the suction pen 300. The suction pen 300 picks up the convex surface of the spherical curved lens, then places the curved surface of the spherical curved lens downwards in the second lens placement position 210a. Then, the suction is released, and the suction pen 300 is pulled out from the horseshoe-shaped opening of the boss 210. Simultaneously, the hollow design reduces the weight of the base. The inner ring of the upper surface of the boss 210 is recessed downward to form a curved surface that fits with the convex surface of the spherical curved lens. The curvature of the recessed surface is customized according to the curvature of the convex surface of the lens to ensure that the two form a surface fit when they come into contact, rather than a point contact or a line contact.

[0037] In one embodiment, such as Figures 4-6As shown, the boss 210 on the fixed base 200 has a horseshoe-shaped horizontal cross-section. The second lens placement position 210a formed by the inner recess of its surface fits against the convex surface of the spherical curved lens and is used to hold the lens with the convex surface facing down. The open side of the horseshoe-shaped structure (i.e. the side of the boss sidewall that is not closed) is usually used for lens picking and placing operations. The suction pen 300 needs to approach the lens from the open side to complete the suction or placement operation. The upper surface of the fixed base 200 is recessed on the side of the opening of the side wall of the boss 210, forming a first clearance 200a. The opening side of the horseshoe-shaped boss 210 is originally a channel for picking up and placing lenses. However, the height difference between the side wall of the boss 210 and the upper surface of the fixed base 200 may hinder the vertical or tilting movement of tools such as the suction pen 300. The first clearance 200a reduces the surface height of the fixed base 200 on the opening side through the recessed design, so that when the suction pen 300 approaches the lens from the opening side, the suction head 320 of the suction pen 300 can be inserted into the inside of the boss 210 more smoothly, avoiding interference (such as collision or jamming) with the surface of the fixed base 200, optimizing the stability of lens placement, thereby improving the practicality and process efficiency of the pre-screening pick-up and place device.

[0038] In one embodiment, such as Figure 4 , Figure 5 As shown, the boss 210 has screw holes 200b on both sides. The fixed base 200 is fixed to the operating table by screws passing through the screw holes 200b, which enhances the connection stability between the fixed base 200 and the operating table and optimizes the performance of the device. The screw connection is a detachable connection. When the fixed base 200 or the boss 210 is worn or damaged, or when the device needs to be cleaned or adjusted, the operator can quickly unscrew the screws and remove the fixed base 200 from the operating table for easy individual repair, replacement of parts, or deep cleaning. This improves the convenience of equipment maintenance and reduces maintenance costs and downtime. Different production scenarios may use different types and specifications of operating tables. By combining the screw holes and screws, the length, diameter, and fastening method of the screws (such as direct screwing in with nuts or bolts) can be flexibly selected according to the material (such as metal or plastic), thickness, and mounting hole position of the actual operating table. This allows the fixed base 200 to be adapted to various operating tables, enhancing the versatility and applicability of the device and expanding its application range.

[0039] In one embodiment, such as Figure 4 , Figure 5 As shown, a plurality of first vacuum holes 210b are provided at intervals on the second lens placement position 210a, and the first vacuum holes 210b are connected to an external vacuum device. By utilizing the first vacuum holes 210b and the external vacuum device, a negative pressure is formed at the bottom of the spherical curved lens when it is placed in the second lens placement position 210a. The pressure difference between the inside and outside is used to adhere the lens to the second lens placement position 210a, thereby improving the stability of the lens placement.

[0040] In one embodiment, such as Figure 5 , Figure 6 As shown, the suction pen 300 includes: a handle 310, a connecting tube 330 connected to the handle 310 at one end, and a suction head 320 disposed at the other end of the connecting tube 330. The suction head 320 is in contact with the convex surface of the spherical curved lens. A second vacuum hole 320a communicating with the connecting tube 330 is opened in the center of the suction head 320. The second vacuum hole 320a is connected to an external vacuuming device through the connecting tube 330. The diameter of the suction head 320 is smaller than the width of the side opening of the boss 210. The process of the suction pen 300 picking up the spherical curved lens is as follows: First, the curved surface of the suction head 320 is attached to the convex surface of the lens, and a vacuum is drawn to generate an adsorption force. The lens is smoothly taken out from the storage rack 100 along the inclined groove 121a. Then, the lens is placed in the second lens placement position with the convex surface facing down. After the curved surfaces are attached, the vacuum is stopped, and the suction head 320 is pulled out from the opening on the side wall of the boss 210. After the screen printing is completed, the above operation is repeated to put the lens back into the storage rack 100. The above structure improves the stability of the suction pen 300 in picking up and placing the spherical curved lens.

[0041] In one embodiment, such as Figure 5 , Figure 6 As shown, the bottom of the suction pen 300 has a protruding fitting 321 (or insertion part). The suction pen 320 is detachably fitted onto the top of the connecting tube 330 via the fitting 321 (the insertion part is detachably inserted into the top of the connecting tube). The suction pen 300 includes suction 320 with fittings 321 (or insertion parts) of different tilt angles and connecting tubes 330 with different bending angles at their top ends. When the angle or spacing of the inclined groove 121a makes it impossible for a regular suction pen 300 to place the suction 320 in the optimal position for picking up the spherical curved lens, the suction pen 300 of this embodiment can adjust the angle of the suction 320 so that the suction 320 is completely aligned with the center of the convex surface of the spherical curved lens. In this case, picking up the lens can effectively reduce accidental drops caused by misalignment and greatly improve the stability of picking up and placing spherical curved lenses.

[0042] In one embodiment, the suction head of the suction pen 320 is made of a flexible material, such as silicone, polyurethane (PU), or thermoplastic elastomer (TPE), which has good elastic recovery ability. When the suction head 320 contacts the convex surface of the lens, the flexible material fills the curvature difference between the two through elastic deformation, so that the contact area is upgraded from point / line contact of the rigid suction head to surface contact. The elastic buffering effect of the flexible material makes the vacuum adsorption force evenly distributed on the convex surface of the lens, avoiding lens deformation or breakage caused by local stress concentration of the rigid suction head 320, and improving the stability of picking up and putting in spherical curved lenses.

[0043] The aforementioned screen printing pre-loading device for spherical curved lenses has an upper crossbar and a lower crossbar between two opposing support plates. Slanted grooves and horizontal grooves are formed on the upper and lower crossbars to create a lens placement slot and a first lens placement position. By tilting the spherical curved lens into the first lens placement position, watermarks are prevented from remaining on the lens after cleaning. Subsequently, an adjustable suction head pen is used to transfer the spherical curved lens to a fixed base for screen printing, greatly improving the quality of the screen printing.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A screen printing pre-loading device for spherical curved lenses, comprising: An operating table, a storage rack (100) disposed on the operating table, a fixed base (200) disposed on the operating table, and a pen suction device (300) are characterized in that the storage rack (100) includes: two opposing support plates (110), and a plurality of crossbars (120) clamped between the two support plates (110) and parallel to each other, the two ends of the crossbars (120) being respectively connected to the support plates (110), a first plane being defined parallel to the upper surface of the operating table, and a second plane being defined parallel between the first plane and the upper surface of the operating table, the crossbars (120) including an upper crossbar (121) located on the first plane and a lower crossbar located on the second plane. (122) Each pair of adjacent upper crossbars (121) and a lower crossbar (122) whose projection is located between them form a lens placement slot (100a). In each lens placement slot (100a), the opposing surfaces of the two upper crossbars (121) are provided with a plurality of oblique grooves (121a), and the upper surface of the lower crossbar (122) is provided with a plurality of horizontal grooves (122a). The two opposing oblique grooves (121a) and the horizontal grooves (122a) in the groove length extension direction of the oblique grooves (121a) form a first lens placement position (100b). The first lens placement position (100b) is used to place a spherical curved lens at an angle.

2. The screen printing pre-loading device for spherical curved surface lenses according to claim 1, characterized in that, The inclined groove (121a) and the transverse groove (122a) are evenly arranged at intervals along the extension direction of the transverse bar (120) to form a plurality of evenly arranged first lens placement positions (100b).

3. The screen printing pre-loading device for spherical curved lenses according to claim 1, characterized in that, The two support plates (110) are provided with a plurality of sliding grooves (110a) facing each other. The two ends of the crossbar (120) are respectively slidably disposed in the sliding grooves (110a) facing each other. The crossbar (120) can move between the two support plates (110) to form a lens placement groove (100a) and a first lens placement position (100b) adapted to spherical curved surface lenses of different sizes.

4. The screen printing pre-loading device for spherical curved surface lenses according to claim 1, characterized in that, The upper surface of the fixed base (200) is provided with a hollow boss (210) with a horseshoe-shaped horizontal cross section. The inner circle of the upper surface of the boss (210) is recessed downward to form a second lens placement position (210a). The surface of the second lens placement position (210a) is in contact with the convex surface of the spherical curved lens. The second lens placement position (210a) is used to hold the spherical curved lens with the convex surface facing downward.

5. The screen printing pre-loading device for spherical curved surface lenses according to claim 4, characterized in that, The portion of the upper surface of the fixed base (200) located on the side of the opening of the side wall of the boss (210) is recessed downward to form a first relief (200a).

6. The screen printing pre-loading device for spherical curved surface lenses according to claim 4, characterized in that, The boss (210) has screw holes (200b) on both sides, and the fixed base (200) is fixed to the operating table by a screw passing through the screw holes (200b).

7. The screen printing pre-loading device for spherical curved surface lenses according to claim 4, characterized in that, The second lens placement position (210a) is provided with a plurality of first vacuum holes (210b) spaced apart, and the first vacuum holes (210b) are connected to an external vacuum device.

8. The screen printing pre-loading device for spherical curved surface lenses according to claim 4, characterized in that, The suction pen (300) includes: a handle (310), a connecting tube (330) connected to the handle (310) at one end, and a suction head (320) at the other end of the connecting tube (330). The suction head (320) is in contact with the convex surface of the spherical curved lens. A second vacuum hole (320a) communicating with the connecting tube (330) is opened in the center of the suction head (320). The second vacuum hole (320a) is connected to an external vacuum device through the connecting tube (330). The diameter of the suction head (320) is smaller than the width of the side opening of the boss (210).

9. The screen printing pre-loading device for spherical curved surface lenses according to claim 8, characterized in that, The suction head (320) has a protruding sleeve (321) at the bottom. The suction head (320) is detachably sleeved on the top of the connecting tube (330) through the sleeve (321). The suction pen (300) includes suction heads (320) with sleeves (321) having different tilt angles.

10. The screen printing pre-loading device for spherical curved surface lenses according to claim 8, characterized in that, The suction head (320) is made of a flexible material.

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