Full-automatic lens assembly equipment for camera production

Abstract

The invention relates to the field of camera production, in particular to full-automatic lens assembly equipment for camera production, which comprises a machine table, a transverse moving platform, a telescopic driving piece I, a connecting rod, a connecting block and the like, a transverse moving platform is arranged on the machine table; two first telescopic driving pieces are arranged on the transverse moving platform, and the telescopic ends of the two first telescopic driving pieces are oppositely arranged; a connecting rod is arranged at the telescopic end of each telescopic driving part I; two linkage rods are hinged to each connecting rod; and a connecting block is hinged between the two linkage rods which are symmetrical left and right on the two connecting rods. According to the invention, the four correction blocks are matched with the inclined guide surface of the guide block under the action of uniformly distributed elastic force of the elastic piece I, so that the self-adaptive centering positioning of the lens is realized, the precise alignment of the optical center of the lens and the axis of the suction head is ensured, and a high-precision and damage-free positioning guarantee is provided for the subsequent automatic assembly of the lens and the lens.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of camera production, and particularly relates to a full-automatic lens assembling equipment for camera production. BACKGROUND

[0002] As the core optical component of the camera module, the assembling quality of the lens directly determines the imaging clarity and the overall performance of the module. In the traditional lens assembling process, in order to facilitate the lens to be smoothly picked up from the tray, a certain gap is usually reserved between the tray placement groove and the lens to avoid the lens edge from being in close contact or rubbing with the groove wall. However, the gap also causes the lens to be easily offset in the placement groove, affecting the positioning accuracy of the subsequent grabbing.

[0003] In the prior art, after the lens is adsorbed by the suction rod, a pair of correction rods are used to correct the position of the lens. However, since the lens is still adsorbed and fixed by the suction rod during the correction process, the suction force needs to be overcome when the correction rod pushes the lens, resulting in forced relative friction between the lens and the end face of the suction rod. This friction process is extremely easy to form micro scratches on the optical surface of the lens, which not only affects the imaging quality, but also reduces the optical performance and yield of the lens product. SUMMARY

[0004] In order to overcome the lens offset caused by the placement groove gap in the lens assembling process, the correction needs to be performed in the suction state, which causes forced friction between the lens and the suction rod, easily damages the optical surface and affects the product quality. The present application provides a full-automatic lens assembling equipment for camera production.

[0005] The technical implementation scheme of the present application is as follows: a full-automatic lens assembling equipment for camera production, comprising a machine table and a transverse moving platform; the machine table is provided with the transverse moving platform; further comprising a telescopic driving member one, a connecting rod, a correction block, an elastic member one, a connecting block, a bearing assembly and a material taking assembly; the transverse moving platform is provided with two telescopic driving member ones, the telescopic ends of the two telescopic driving member ones are oppositely arranged; each telescopic driving member one is provided with a connecting rod at the telescopic end; each connecting rod is hingedly connected with two linkage rods; the two linkage rods on the left and right symmetrical connecting rods are jointly hingedly connected with a connecting block; the two connecting blocks are distributed in front and back symmetry; each connecting rod is provided with an activity cavity; each connecting block is provided with a sliding cavity; each activity cavity and each sliding cavity are slidably connected with a correction block for correcting the lens; each pair of symmetrical correction blocks are respectively provided with an arc notch on the opposite sides; the correction block and the corresponding activity cavity inner wall are provided with an elastic member one; the correction block and the corresponding sliding cavity inner wall are also provided with an elastic member one; the machine table is provided with a bearing assembly for bearing the material tray; the transverse moving platform is provided with a material taking assembly for adsorbing the lens.

[0006] Optionally, the bearing assembly comprises slide rails, electric slide blocks and a bearing plate; two slide rails are fixedly connected to the machine table; each slide rail is slidably connected with an electric slide block; all the electric slide blocks are fixedly connected with a bearing plate for bearing the material tray; two limiting grooves are formed in the bearing plate.

[0007] Optionally, a plurality of avoiding grooves are formed in the bearing plate; each avoiding groove is communicated with the limiting groove on the bearing plate.

[0008] Optionally, the material taking assembly comprises a telescopic driving member three, a suction pipe and a suction head; the telescopic driving member three is fixedly connected to the transverse moving platform; the telescopic end of the telescopic driving member three is fixedly connected with the suction pipe; the suction head is arranged on the lower side of the suction pipe; the four correction blocks are all directed to the center point of the suction head.

[0009] Optionally, the lower end of the suction head is provided with a rubber soft pad for protecting the lens.

[0010] Optionally, it further comprises guide blocks; two guide blocks for guiding the correction of the lens are arranged on each correction block; each guide block is provided with a guide surface directed to one side of the center of the suction head; the guide surface is arranged in a concave arc shape.

[0011] Optionally, it further comprises a sealing buckle; the lower part of the suction pipe is connected with the sealing buckle for locking and fixing the suction head through an outer convex edge; the upper part of the suction head is provided with an outer convex edge two which is located in the sealing buckle.

[0012] Optionally, it further comprises an air pipe and an elastic member two; the air pipe is fixedly connected to the lower side of the sealing buckle; an air cavity is formed between the lower side of the outer convex edge two and the sealing buckle; the air pipe is communicated with the air cavity; an elastic member two is fixedly connected between the suction pipe and the suction head.

[0013] Optionally, the outer side edge of the outer convex edge two is provided with a sealing rubber ring; the lower part of the sealing buckle is also provided with a sealing rubber ring at the contact position with the outer side columnar surface of the suction head.

[0014] Compared with the prior art, the present application has the following advantages: the present application realizes the self-adaptive center positioning of the lens through the four correction blocks under the uniform elastic force of the elastic member one, cooperates with the inclined guide surface of the guide block, ensures the accurate alignment of the optical center of the lens and the axis of the suction head, and provides high-precision and non-damage positioning guarantee for the subsequent automatic assembly of the lens and the lens. Through the air pipe cooperating with the elastic member two to drive the suction head to instantaneously rise in the sealing buckle, the lens is quickly separated from the suction head when it is separated from the adsorption state, so that in the process of the correction block relying on the elastic force of the elastic member one to flexibly center and correct the lens, the contact friction between the suction head and the surface of the lens is prevented, the risk of scratches on the surface of the lens is avoided, and the protection effect of the lens in the process of correcting the lens is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 This is a three-dimensional structural diagram of the fully automated lens assembly equipment for camera production according to the present invention; Figure 2 This is a three-dimensional structural diagram of the connecting rod, bearing component, material handling component, air pipe and sealing buckle combination of the present invention; Figure 3 This is a three-dimensional structural diagram of the connecting rod, straightening block, elastic element 1, connecting block, guide block, material picking assembly, and sealing buckle assembly of the present invention; Figure 4 This is a three-dimensional structural diagram of the combination of the connecting rod, the straightening block, the elastic element, the connecting block and the guide block of the present invention. Figure 5 This is a three-dimensional structural diagram of the material handling component, air tube, elastic element 2, and sealing buckle combination of the present invention; Figure 6 This is a three-dimensional structural diagram of the combination of the correction block, guide block, and suction head of the present invention.

[0016] The components in the attached diagram are labeled as follows: 1-Machine base, 2-Transverse platform, 3-Telescopic drive component one, 4-Connecting rod, 4001-Linkage rod, 4002-Moving cavity, 5-Correcting block, 6-Elastic component one, 7-Connecting block, 7001-Sliding cavity, 8-Guide block, 8001-Guide surface, 101-Slide rail, 102-Electric slider, 103-Bearing plate, 10301-Allowing groove, 201-Telescopic drive component three, 202-Suction tube, 20201-Outer protrusion one, 203-Suction head, 20301-Outer protrusion two, 301-Air pipe, 302-Elastic component two, 401-Sealing buckle, 40101-Air cavity. Detailed Implementation

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1: As Figures 1-6 As shown, a fully automated lens assembly equipment for camera production includes a machine table 1 and a transverse platform 2; the machine table 1 is equipped with the transverse platform 2. It also includes telescopic drive 3, connecting rod 4, correction block 5, elastic element 6, connecting block 7, bearing assembly and material taking assembly; The transverse moving platform 2 is provided with two telescopic drive 3 which are symmetrically distributed left and right, the telescopic ends of the two telescopic drive 3 are oppositely arranged, and the telescopic drive 3 is an electric push rod; The telescopic end of each telescopic drive 3 is provided with a connecting rod 4; Each connecting rod 4 is hingedly connected with two linkage rods 4001 which are symmetrically distributed front and back; The two connecting rods 4 are symmetrically arranged left and right, and the two linkage rods 4001 are symmetrically arranged front and back; The two connecting rods 4 are symmetrically arranged left and right, and the two linkage rods 4001 are symmetrically arranged front and back; Each connecting rod 4 is provided with an active cavity 4002; Each connecting block 7 is provided with a sliding cavity 7001; Each active cavity 4002 and each sliding cavity 7001 are slidably connected with a correction block 5; Each of the two correction blocks 5 is provided with an arc notch on the opposite side; The correction block 5 and the inner wall of the corresponding active cavity 4002 are provided with an elastic element 6, and the correction block 5 and the inner wall of the corresponding sliding cavity 7001 are also provided with an elastic element 6; The machine table 1 is provided with a bearing assembly; The transverse moving platform 2 is provided with a material taking assembly.

[0019] The bearing assembly comprises a sliding rail 101, an electric sliding block 102 and a bearing plate 103; The machine table 1 is fixedly connected with two sliding rails 101 which are symmetrically distributed left and right; Each sliding rail 101 is slidably connected with an electric sliding block 102; All the electric sliding blocks 102 are fixedly connected with a bearing plate 103; The bearing plate 103 is provided with two limiting grooves.

[0020] The bearing plate 103 is provided with a plurality of avoidance grooves 10301 which are distributed on both sides of the material tray; Each avoidance groove 10301 is in communication with the limiting groove on the bearing plate 103, so as to facilitate the worker to take the material tray from the lower side of the material tray for discharging.

[0021] The material taking assembly comprises a telescopic drive 201, a suction pipe 202 and a suction head 203; The transverse moving platform 2 is fixedly connected with a telescopic drive 201, and the telescopic drive 201 is an electric push rod; The telescopic end of the telescopic drive 201 is fixedly connected with a suction pipe 202; The suction pipe 202 is provided with a suction head 203 on the lower side; The four correction blocks 5 are all directed to the center point of the suction head 203.

[0022] The lower end of the suction head 203 is provided with a rubber soft pad.

[0023] It also includes a guide block 8; Each correction block 5 is provided with two guide blocks 8 which are symmetrically distributed up and down; Each guide block 8 is provided with a guide surface 8001 on the side of the center of the suction head 203; The guide surface 8001 is provided in concave arc shape.

[0024] Further comprising a sealing buckle 401; the lower part of the suction pipe 202 is detachably connected with the sealing buckle 401 through the outer convex edge one 20201; the upper part of the suction head 203 is provided with an outer convex edge two 20301, which is located in the sealing buckle 401.

[0025] Further comprising a trachea 301 and a second elastic member 302; the lower side of the sealing buckle 401 is fixedly connected with the trachea 301; the lower side of the outer convex edge two 20301 and the sealing buckle 401 form an air cavity 40101; the trachea 301 communicates with the air cavity 40101; a second elastic member 302 is fixedly connected between the suction pipe 202 and the suction head 203, and the second elastic member 302 is a spring.

[0026] The outer side edge of the outer convex edge two 20301 is provided with a sealing rubber ring; the contact position between the lower part of the sealing buckle 401 and the outer side cylindrical surface of the suction head 203 is also provided with a sealing rubber ring, which is used to enhance the sealing effect of the air cavity 40101.

[0027] In the production and assembly of the lens, the staff first places the tray containing the lens and the tray containing the lens on the two limiting grooves on the bearing plate 103, then controls the transverse moving platform 2 to drive the telescopic driving member one 3 and the telescopic driving member three 201 to move above the lens to be grabbed, then controls the telescopic driving member three 201 to drive the suction pipe 202 to descend, so that the lower end of the suction head 203 is attached to the upper side of the lens, at this time, the external air pump is controlled to suck the lens through the suction head 203 by the suction pipe 202, so that the lens is adsorbed and fixed on the suction head 203, then the telescopic driving member three 201 is controlled to drive the suction pipe 202 to rise, so that the suction head 203 takes out the lens from the tray placing groove, and drives the lens to rise to the same height as the correcting block 5, and the lens taking work is completed; then the transverse moving platform 2 is controlled to drive the telescopic driving member one 3 and the telescopic driving member three 201 to move towards the lens tray, so that the suction head 203 moves the lens above the lens tray, because the sizes of the lenses and the lenses are different, the positions of the lenses and the lenses on the respective trays cannot be corresponded one by one, therefore, while the transverse moving platform 2 moves, the electric sliding block 102 is synchronously controlled to drive the bearing plate 103 to slide on the sliding rail 101, so that the bearing plate 103 drives the lens on the tray to be opposite to the suction head 203, then the telescopic driving member three 201 is controlled to drive the suction pipe 202 and the suction head 203 to descend, so that the suction head 203 installs the lens into the lens, and the automatic installation work between the lens and the lens is completed, when the lens installation is completed, the telescopic driving member three 201 is controlled to drive the suction pipe 202 and the suction head 203 to rise and reset, then the transverse moving platform 2 is controlled to drive the telescopic driving member one 3 and the telescopic driving member three 201 to move towards the lens tray, in this process, the electric sliding block 102 is synchronously controlled to drive the bearing plate 103 to slide on the sliding rail 101, so that the bearing plate 103 drives the lens on the tray to move to the position to be grabbed, preparing for the next taking work.

[0028] It is considered that, since the lens surface is usually convex, when the lens is positionally offset in the placing groove, the suction head 203 will not be able to suck the center of the lens arc when it is adsorbed, so that the lens is adsorbed and fixed in an inclined state on the suction head 203, affecting the subsequent correction and assembly operation. Therefore, when the lens is taken out from the tray and moved towards the lens tray by the horizontal moving platform 2 driving the telescopic driving member one 3 and the telescopic driving member three 201, the two telescopic driving members one 3 drive the two connecting rods 4 to move towards each other, and the two connecting rods 4 drive the two correction blocks 5 opposite to each other to move towards the lens on the suction head 203. In this process, the two connecting rods 4 drive the two connecting blocks 7 to move towards each other through the linkage rod 4001, and the two connecting blocks 7 drive the two correction blocks 5 opposite to each other to move towards the lens on the suction head 203. With the continuous movement of the two connecting rods 4 towards each other, all the correction blocks 5 will contact the lens. Combined with the fact that the lens is inclined, the four correction blocks 5 will be in contact with the lens and limit the lens in position. At the same time, the edge of the inclined lens is in contact with the guide block 8. The correction block 5 that first contacts the lens is blocked by the lens and is squeezed into the movable cavity 4002 and the sliding cavity 7001, and the elastic member one 6 is compressed. It should be noted that the compression amount of the elastic member one 6 that first contacts the lens and is squeezed by the correction block 5 is greater than that of the elastic member one 6 that later contacts the lens and is squeezed by the correction block 5, and the elastic force of the elastic member one 6 is smaller than the suction force of the suction head 203 on the lens. When the lens is completely in contact with the four correction blocks 5, the external air pump is controlled to stop suctioning the suction pipe 202, and the suction of the suction head 203 on the lens is released. The lens is clamped and fixed by the four correction blocks 5 under the elastic force of the elastic member one 6, and at the same time, the four correction blocks 5 drive the offset lens to be centered and corrected through the elastic force of the elastic member one 6, so that the lens moves to the position directly below the suction head 203. At the same time, the guide block 8 is squeezed by the two correction blocks 5 opposite to each other to squeeze the edge of the inclined lens, so that the edge of the lens is guided to the same level as the correction block 5 by the guide surface 8001 under the action of the squeezing force, realizing the flexible self-centering positioning of the lens in the state of no suction force constraint. It avoids the damage to the lens surface caused by the forced friction between the lens and the suction head 203 in the traditional hard correction process, and at the same time, it ensures the accurate alignment of the center of the optical arc surface of the lens and the suction head 203, prevents the lens from being inclined, and ensures the normal operation of the subsequent assembly operation. Figure 6

[0029] ​When the inclined lens is corrected by the correction block 5 and the guide block 8, the control of the telescopic drive one 3 makes the two connecting rods 4 continuously move towards each other, so that the correction block 5 is compressed into the movable cavity 4002 and the sliding cavity 7001, further compressing the elastic member one 6, so that the correction block 5 clamps the corrected lens, prevents the lens from shaking between the four correction blocks 5 during movement, enhances the stability of the corrected lens during movement, and facilitates the subsequent suction head 203 to re-suck and fix the lens after correction and centering; when the lens is clamped by the four correction blocks 5, the external air pump controls the suction pipe 202 to suck and fix the lens after correction and centering by the suction head 203, and then the telescopic drive one 3 drives the two connecting rods 4 to move away, in this process, the connecting rod 4 drives the two connecting blocks 7 to move away through the linkage rod 4001, so that the connecting rod 4 and the connecting block 7 drive the correction block 5 to separate from the lens, and at the same time, the elastic member one 6 drives the correction block 5 to extend and reset from the movable cavity 4002 and the sliding cavity 7001 under the action of its own elastic force, and then the telescopic drive three 201 drives the suction pipe 202 and the suction head 203 to descend for lens installation work.

[0030] It is also considered that when the suction of the lens by the suction head 203 is released, the four correction blocks 5 drive the offset lens to center and correct under the action of the elastic force of the elastic member one 6, although there is no suction force of the lens by the suction head 203, but at this time the lens is still in contact with the lower side of the suction head 203, and when the lens is moved by the correction block 5 for centering, the lens and the lower side of the suction head 203 contact and move relatively, the sliding friction caused by the relative displacement still exists the risk of slightly scratching the surface of the lens, especially when the lens is in an inclined state of the suction head 203, the scratching is more serious, therefore, before the lens is sucked by the suction head 203, the external air pump controls the air pipe 301 to suck the air cavity 40101, so that a negative pressure is formed in the air cavity 40101, and the negative pressure drives the outer convex edge two 20301 to drive the suction head 203 to descend and fix to the lower part of the sealing buckle 401, and the elastic member two 302 is stretched, before the suction of the lens by the suction head 203 is released, the external air pump is controlled to reverse and inject air into the air cavity 40101 through the air pipe 301, and then the suction of the lens by the suction head 203 is released, at this time, under the action of the resilience of the elastic member two 302 and the air pressure, the outer convex edge two 20301 drives the suction head 203 to instantaneously rise on the sealing buckle 401 and separate from the surface of the lens, so that the lens is not in contact with the lower side of the suction head 203 when it is moved by the correction block 5 for centering, and the protection effect of the lens during the correction process is enhanced, when the lens is corrected, the external air pump is controlled to suck the air cavity 40101 through the air pipe 301, so that the outer convex edge two 20301 drives the suction head 203 to be fixed to the lower part of the sealing buckle 401 again, and the subsequent lens installation work is continued.

[0031] In summary, the present application realizes self-adaptive centering positioning of the lens through the four correction blocks 5 under the uniform elastic force of the elastic member one 6, cooperates with the inclined guide surface 8001 of the guide block 8, ensures the accurate alignment of the optical center of the lens and the axis of the suction head 203, provides high-precision and non-damage positioning guarantee for the subsequent automatic assembly of the lens and the lens, at the same time, through the cooperation of the air pipe 301 and the elastic member two 302 to drive the suction head 203 to instantaneously rise in the sealing buckle 401, the lens is quickly separated from the suction head 203 when it is separated from the adsorption state, so that in the process of the correction block 5 relying on the elastic force of the elastic member one 6 to flexibly center and correct the lens, the contact and friction between the suction head 203 and the surface of the lens are prevented, the risk of scratches on the surface of the lens is avoided, and the protection effect of the lens in the process of correcting the lens is enhanced.

[0032] When the lens assembly is completed, the worker needs to take down the tray, the worker places both hands in the avoiding groove 10301 to take down the material tray from the bearing plate 103, and the unloading is completed, when different specifications of lenses need to be assembled, the worker only needs to open the sealing buckle 401, takes down the suction head 203 from the sealing buckle 401, and replaces the suction head 203 matched with the lens specification for use, realizes the quick disassembly and assembly of the suction head 203, effectively solves the problems of complicated operation and long time consumption in the traditional replacement mode, and improves the adaptability and overall efficiency of the lens assembly process.

[0033] Although the present application has been described with reference to the example embodiments, it is to be understood that the application is not limited to the disclosed example embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all variations and equivalents.

Claims

1. A fully automated lens assembly equipment for camera production, comprising a machine table (1) and a transverse platform (2); the machine table (1) is provided with the transverse platform (2); characterized in that: It also includes a telescopic drive component (3), a connecting rod (4), a straightening block (5), an elastic component (6), a connecting block (7), a load-bearing assembly, and a material handling assembly; two telescopic drive components (3) are provided on the transverse platform (2), and the telescopic ends of the two telescopic drive components (3) are arranged opposite each other; a connecting rod (4) is provided on the telescopic end of each telescopic drive component (3); two linkage rods (4001) are hinged on each connecting rod (4); a connecting block (7) is hinged between the two linkage rods (4001) that are symmetrically arranged on the left and right sides of the two connecting rods (4); the two connecting blocks (7) are symmetrically distributed front and back; a movable cavity is opened on each connecting rod (4). 4002); a sliding cavity (7001) is provided on each connecting block (7); a corrective block (5) for correcting lenses is slidably connected in each movable cavity (4002) and each sliding cavity (7001); an arc notch is provided on the opposite side of each pair of symmetrical corrective blocks (5); an elastic element (6) is provided between the corrective block (5) and the inner wall of the corresponding movable cavity (4002); an elastic element (6) is also provided between the corrective block (5) and the inner wall of the corresponding sliding cavity (7001); a bearing component for carrying material trays is provided on the machine base (1); a material picking component for picking up lenses is provided on the transverse platform (2).

2. The fully automated lens assembly equipment for camera production according to claim 1, characterized in that: The load-bearing components include a slide rail (101), an electric slider (102), and a load-bearing plate (103); two slide rails (101) are fixedly connected to the machine base (1); an electric slider (102) is slidably connected to each slide rail (101); a load-bearing plate (103) for carrying material pallets is fixedly connected to all electric sliders (102); two limiting grooves are provided on the load-bearing plate (103).

3. A fully automated lens assembly device for camera production according to claim 2, characterized in that: The support plate (103) has several clearance grooves (10301); each clearance groove (10301) is connected to the limiting groove on the support plate (103).

4. A fully automated lens assembly device for camera production according to claim 1, characterized in that: The material handling assembly includes a telescopic drive component three (201), a suction pipe (202), and a suction head (203); the telescopic drive component three (201) is fixedly connected to the transverse platform (2); the suction pipe (202) is fixedly connected to the telescopic end of the telescopic drive component three (201); the suction head (203) is provided on the lower side of the suction pipe (202); and the four correction blocks (5) are all facing the center point of the suction head (203).

5. A fully automated lens assembly device for camera production according to claim 4, characterized in that: The lower end of the suction head (203) is provided with a rubber pad for protecting the lens.

6. A fully automated lens assembly device for camera production according to claim 5, characterized in that: It also includes guide blocks (8); each correction block (5) is provided with two guide blocks (8) for guiding the lens to perform correction; each guide block (8) is provided with a guide surface (8001) on the side facing the center of the suction head (203); the guide surface (8001) is set in a concave arc shape.

7. A fully automated lens assembly device for camera production according to claim 6, characterized in that: It also includes a sealing buckle (401); the lower part of the suction tube (202) is connected to a sealing buckle (401) for locking and fixing the suction head (203) via an outer protrusion first (20201); the upper part of the suction head (203) is provided with an outer protrusion second (20301), which is located inside the sealing buckle (401).

8. A fully automated lens assembly device for camera production according to claim 7, characterized in that: It also includes an air tube (301) and an elastic element two (302); the air tube (301) is fixedly connected to the lower side of the sealing buckle (401); an air cavity (40101) is formed between the lower side of the outer protrusion two (20301) and the sealing buckle (401); the air tube (301) is connected to the air cavity (40101); an elastic element two (302) is fixedly connected between the suction tube (202) and the suction head (203).

9. A fully automated lens assembly device for camera production according to claim 8, characterized in that: A sealing rubber ring is provided on the outer edge of the outer protrusion (20301); a sealing rubber ring is also provided at the contact position between the lower part of the sealing buckle (401) and the outer columnar surface of the suction head (203).

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