CN218948416U

CN218948416U - FPC board bending test automaton

Info

Publication number: CN218948416U
Application number: CN202122874374.4U
Authority: CN
Inventors: 刘旭东; 许俊东
Original assignee: Dongguan Zhengguan Shengzhi Control Technology Co ltd
Current assignee: Dongguan Zhengguan Shengzhi Control Technology Co ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2023-05-02
Anticipated expiration: 2031-11-22

Abstract

The utility model relates to the technical field of FPC board processing, in particular to an FPC board bending test automaton, which comprises a base, a material taking and placing device erected on the base, a feeding device, a material receiving device and bending test equipment, wherein the feeding device, the material receiving device and the bending test equipment are respectively arranged on the base, the bending test equipment is arranged between the feeding device and the material receiving device, a material taking and placing end of the material taking and placing device is movably arranged above the feeding device, the material receiving device and the bending test equipment, and the bending test equipment comprises a rotation driving mechanism arranged on the base, a rotary table connected with an output end of the rotation driving mechanism, a plurality of carriers respectively arranged on the circumference of the rotary table, a positioning and separating device, a bending device and a test device, wherein the positioning and separating device are distributed outside the circumference of the rotary table. According to the utility model, the feeding, the separation of the FPC board and the PI sheet, the bending forming, the electrical test and the discharging are automatically realized, the production efficiency is greatly improved, and the labor cost and the labor intensity are reduced.

Description

FPC board bending test automaton

Technical Field

The utility model relates to the technical field of FPC board processing, in particular to an FPC board bending test automaton.

Background

The end parts of electronic products such as mobile phone screens are connected with FPC boards, and PI sheets are adhered to the FPC boards. In the processing production of electronic products, the FPC board and the PI sheet are required to be separated, and then the FPC board after PI separation is subjected to bending molding and testing. In the prior art, the FPC board and the PI sheet are separated by manpower, then the product after PI separation is manually conveyed into a bending machine for bending and forming, and the product after bending and forming is manually conveyed into a testing machine for testing, so that the production efficiency is low, the labor cost is high, and the labor intensity is high. Thus, the drawbacks are quite apparent and there is a need to provide a solution.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide an FPC board bending test automaton.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a FPC board test automaton that bends, its includes the frame, erects in getting the blowing device of frame and install respectively in the feedway of frame, receiving material device and bend test equipment, bend test equipment and be located between feedway and the receiving material device, get the blowing end activity of blowing device and set up in the top of feedway, receiving material device and bend test equipment, bend test equipment including install in the rotation actuating mechanism of frame, the carousel of being connected with rotation actuating mechanism's output, install respectively in a plurality of carriers of the circumference of carousel and distribute in the outer positioning separation device of circumference of carousel, bending device and testing arrangement.

Further, the positioning and separating device comprises a machine table arranged on the machine table, a positioning mechanism arranged on the machine table, a pressing mechanism movably arranged on the machine table and a separating mechanism arranged on the machine table, wherein the machine table is provided with a separating notch communicated with the positioning end of the positioning mechanism, the separating mechanism comprises a Y-axis moving driver arranged on the machine table, a rotating driver connected with the output end of the Y-axis moving driver, a rotating block connected with the output end of the rotating driver, a clamping driver arranged at the eccentric position of the rotating block and two separating clamping claws respectively arranged at the two clamping ends of the clamping driver, the clamping driver is used for driving the two separating clamping claws to be close to or far away from each other, and the separating notch is used for providing avoidance space for the two separating clamping claws.

Further, the separation clamping jaw is a cylindrical rod.

Further, the positioning mechanism comprises a first positioning piece arranged on the base, a second positioning piece movably arranged on the base and a first positioning driver which is arranged on the base and used for driving the second positioning piece to be close to or far away from the first positioning piece, and the first positioning piece and the second positioning piece are enclosed to form a positioning cavity.

Further, the positioning mechanism further comprises a third positioning piece arranged on the base in a moving mode and a second positioning driver which is arranged on the base and used for driving the third positioning piece to be close to or far away from the first positioning piece and the second positioning piece, the third positioning piece protrudes to the separation notch, and the first positioning piece, the second positioning piece and the third positioning piece are enclosed to form a positioning cavity.

Further, the pressing mechanism comprises an X-axis moving driver arranged on the base, a pressing driver arranged at the output end of the X-axis moving driver and a pressing piece arranged at the output end of the pressing driver, wherein the X-axis moving driver is used for driving the pressing driver to be close to or far away from the positioning end of the positioning mechanism, and the pressing piece is positioned above the positioning end of the positioning mechanism.

Further, get blowing device includes material loading manipulator, shifts manipulator and unloading manipulator, material loading manipulator switches between feedway and location separator, it switches between the carousel to shift the manipulator at location separator, unloading manipulator switches between carousel and receiving device.

Further, the feeding device or/and the receiving device comprises a receiving tray frame arranged on the machine base, a tray feeding mechanism arranged at a distance from the receiving tray frame, a transfer driving mechanism arranged on the machine base and a lifting transfer table connected with the output end of the transfer driving mechanism, wherein the transfer driving mechanism is used for driving the lifting transfer table to reciprocate below a tray receiving opening of the receiving tray frame, below the material taking and discharging device and below a tray feeding opening of the tray feeding mechanism.

Further, the number of the bending devices is one or more.

Further, the machine is provided with a suction hole, and the suction hole is positioned in the positioning cavity.

The utility model has the beneficial effects that: in practical application, the feedway is used for supplying the product to getting the blowing device, get the blowing device and pick up the product to location separator, location separator is to the product location, then carry out FPC board and PI piece to the product after the location, make the PI piece peel off from the FPC board, then, get the blowing device and pick up the product after peeling off the PI piece to being located on the carrier of material loading station, the carrier bears the product after peeling off the PI piece, the rotation driving mechanism drives the carousel and rotates simultaneously with all carriers, along with the rotation of carousel, the carrier rotates cyclically between material loading station, bending station, test station and unloading station, bending station and test station correspond with bending device and test device respectively, when the product after peeling off the PI piece removes to bending station, bending device carries out the shaping of bending to the FPC board on the product, when the product after the shaping of bending of FPC board removes to the test station, test device carries out the electrical test with the FPC board of product, when the product after the electrical test removes to the unloading station, pick up the product after the electrical test to the receiving device with the product after the electrical test to receiving device, the electrical test is carried out the electrical test to the product after receiving device and the electrical test. According to the utility model, the feeding, the separation of the FPC board and the PI sheet, the bending forming, the electrical test and the discharging are automatically realized, the production efficiency is greatly improved, and the labor cost and the labor intensity are reduced.

Drawings

Fig. 1 is a schematic perspective view of the present utility model.

Fig. 2 is a schematic perspective view of the positioning and separating device of the present utility model.

Fig. 3 is a schematic structural view of a positioning mechanism and a machine of the present utility model.

Fig. 4 is a schematic perspective view of a feeding device or a receiving device according to the present utility model.

Reference numerals illustrate:

1. a machine table; 2. a positioning mechanism; 3. a pressing mechanism; 4. a separation mechanism; 5. a separation notch; 6. a Y-axis movement driver; 7. a rotary driver; 8. a rotating block; 9. a grip drive; 10. separating the clamping jaw; 11. an X-axis movement driver; 12. a pressing driver; 13. a pressing member; 14. a first positioning member; 15. a second positioning member; 16. a first positioning driver; 17. a positioning cavity; 18. a third positioning member; 19. a second positioning driver; 20. a second positioning column; 21. positioning a chute; 22. a first positioning column; 23. a third positioning column; 24. a product; 25. a suction hole; 26. a base; 27. a material taking and discharging device; 28. a feeding device; 29. a material receiving device; 30. a rotation driving mechanism; 31. a turntable; 32. a carrier; 33. positioning and separating device; 34. a bending device; 35. a testing device; 36. a feeding manipulator; 37. a transfer robot; 38. a blanking manipulator; 39. a disc collecting frame; 40. a tray supply mechanism; 41. a transfer drive mechanism; 42. lifting the transfer table.

Detailed Description

The utility model will be further described with reference to examples and drawings, to which reference is made, but which are not intended to limit the scope of the utility model.

As shown in fig. 1 to 4, the bending test automaton for the FPC board provided by the utility model comprises a base 26, a material taking and placing device 27 erected on the base 26, a material feeding device 28, a material receiving device 29 and a bending test device which are respectively arranged on the base 26, wherein the bending test device is positioned between the material feeding device 28 and the material receiving device 29, the material taking and placing end of the material taking and placing device 27 is movably arranged above the material feeding device 28, the material receiving device 29 and the bending test device, and the bending test device comprises a rotation driving mechanism 30 arranged on the base 26, a rotary table 31 connected with the output end of the rotation driving mechanism 30, a plurality of carriers 32 respectively arranged on the circumference of the rotary table 31, a positioning and separating device 33, a bending device 34 and a test device 35 which are distributed on the circumference of the rotary table 31; one end of the product 24 is provided with an FPC board and a PI sheet attached to the FPC board, and the PI sheet is a polyimide sheet.

In practical application, the feeding device 28 is used for supplying the product 24 to the feeding and discharging device 27, the feeding and discharging device 27 picks up the product 24 to the positioning and separating device 33, the positioning and separating device 33 positions the product 24, then the positioned product 24 is subjected to FPC board and PI sheet, the PI sheet is peeled off from the FPC board, then the feeding and discharging device 27 picks up the product 24 with the PI sheet peeled off onto the carrier 32 positioned at the feeding station, the carrier 32 carries the product 24 with the PI sheet peeled off, the rotary driving mechanism 30 drives the rotary table 31 to synchronously rotate along with all the carriers 32, the carrier 32 rotates cyclically between the feeding station, the bending station and the testing station respectively correspond to the bending device 34 and the testing device 35, the bending device 34 bends and forms the FPC board on the product 24 when the product 24 with the PI sheet peeled off moves to the bending station, the testing device 35 is electrically connected with the FPC board of the product 24 to electrically test the FPC board, the product 24 after the FPC board is bent and formed, the product 24 is electrically tested after the product 24 is subjected to the bending station, the electrical property is picked up by the electrical property collecting device 29 after the product 24 is electrically tested to the feeding and discharging device after the product 24 is picked up by the electrical property collecting device 29. According to the utility model, the feeding, the separation of the FPC board and the PI sheet, the bending forming, the electrical test and the discharging are automatically realized, the production efficiency is greatly improved, and the labor cost and the labor intensity are reduced.

In this embodiment, the positioning and separating device 33 includes a machine 1 mounted on the machine base 26, a positioning mechanism 2 disposed on the machine 1, a pressing mechanism 3 movably disposed on the machine 1, and a separating mechanism 4 disposed on the machine 1, the machine 1 is provided with a separating gap 5 communicating with a positioning end of the positioning mechanism 2, the separating mechanism 4 includes a Y-axis moving driver 6 mounted on the machine 1, a rotating driver 7 connected with an output end of the Y-axis moving driver 6, a rotating block 8 connected with an output end of the rotating driver 7, a clamping driver 9 disposed at an eccentric position of the rotating block 8, and two separating jaws 10 respectively disposed at two clamping ends of the clamping driver 9, the clamping driver 9 is used for driving the two separating jaws 10 to approach or separate from each other, and the separating gap 5 is used for providing an avoidance space for the two separating jaws 10; specifically, the driving direction of the Y-axis moving driver 6 is parallel to the horizontal offset direction of the clamping driver 9, the driving direction of the Y-axis moving driver 6 is parallel to the Y-axis of the machine table 1, the Y-axis moving driver 6 may be a cylinder, the rotating driver 7 may be a rotary cylinder or a motor, and the clamping driver 9 may be a clamping cylinder.

Initially, two separation clamping jaws 10 are in the state of expanding, and correspond with the position of separation breach 5, get blowing device 27 and place product 24 on board 1, the FPC board and the PI piece of product 24 are located separation breach 5 departments, after the location end of positioning mechanism 2 carries out accurate positioning to product 24, then, push down the main part of product 24 after the positioning and press down mechanism 3 on board 1, so as to guaranteed the position accuracy and the stability of product 24, then two separation clamping jaws 10 are close to each other and closed of clamping driver 9 drive, two separation clamping jaws 10 of closed centre gripping FPC board and PI piece, then rotation driver 7 drive rotary block 8 forward rotation preset angle (for example: 90 degrees), the rotating block 8 drives the clamping driver 9 to synchronously rotate, because the clamping driver 9 is positioned at the eccentric position of the rotating block 8, the clamping driver 9 drives the two separating clamping jaws 10 to rotate upwards and forwards, the clamping driver 9 and the two separating clamping jaws 10 can generate Y-axis offset, the two separating clamping jaws 10 clamp the FPC board and the PI sheet to turn upwards and the Y-axis offset, at the moment, the FPC board is bent into an arc shape, the Y-axis moving driver 6 drives the rotating driver 7 to drive the clamping driver 9 and the two separating clamping jaws 10 to move along the direction away from the pressing mechanism 3, the FPC board bent into the arc shape can move along the two separating clamping jaws 10, in the process, the elasticity of the PI sheet can gradually separate from the FPC board along the tangential direction of the arc, and finally the rotating driver 7 drives the rotating block 8 to reversely rotate and reset, so that the two separating clamping jaws 10 restore the FPC board to a flat state, the FPC board and the PI sheet are completely separated, the device is convenient for separating the FPC board from the PI sheet of the next product 24, the separating jaw 10 is opened to facilitate access to the product 24. The positioning and separating device 33 not only can position the product, but also can automatically separate the FPC board and the PI sheet of the product 24, thereby improving the separating efficiency and quality and reducing the labor cost and labor intensity.

In this embodiment, the pressing mechanism 3 includes an X-axis moving driver 11 mounted on the machine 1, a pressing driver 12 mounted on an output end of the X-axis moving driver 11, and a pressing member 13 mounted on an output end of the pressing driver 12, where the X-axis moving driver 11 is used to drive the pressing driver 12 to approach or depart from a positioning end of the positioning mechanism 2, and the pressing member 13 is located above the positioning end of the positioning mechanism 2, and a driving direction of the X-axis moving driver 11 is parallel to an X-axis direction of the machine 1.

In practical application, the X-axis moving driver 11 drives the pressing driver 12 to move along with the pressing member 13 toward the product 24 until the pressing member 13 is located above the product 24, and then the pressing driver 12 drives the pressing member 13 to move downward until the pressing member 13 presses the located product 24 onto the machine 1, so as to ensure the stability of the product 24.

In this embodiment, the separating jaw 10 is a cylindrical rod; this structural design, at the in-process of separation FPC board and PI piece, not only prevent damage product 24, still make the FPC board make tangent line or circular arc motion along the arc surface of cylinder pole, be favorable to FPC board and PI piece to separate fast, separation effect is good.

In this embodiment, the positioning mechanism 2 includes a first positioning member 14 disposed on the machine 1, a second positioning member 15 movably disposed on the machine 1, and a first positioning driver 16 disposed on the machine 1 and used for driving the second positioning member 15 to approach or depart from the first positioning member 14, where the first positioning driver 16 is an air cylinder, and the first positioning member 14 and the second positioning member 15 enclose a positioning cavity 17. In practical application, the product 24 is placed in the positioning cavity 17, and then the first positioning driver 16 drives the second positioning member 15 to move close to the first positioning member 14, so that the positioning cavity 17 is reduced until the edges of the product 24 respectively collide with the first positioning member 14 and the second positioning member 15, so as to realize accurate positioning of the product 24.

In this embodiment, the positioning mechanism 2 further includes a third positioning member 18 movably disposed on the machine 1, and a second positioning driver 19 disposed on the machine 1 and used for driving the third positioning member 18 to approach or depart from the first positioning member 14 and the second positioning member 15, where the second positioning driver 19 is an air cylinder, the third positioning member 18 protrudes to the separation notch 5, and the first positioning member 14, the second positioning member 15 and the third positioning member 18 enclose a positioning cavity 17.

In practical application, the product 24 is placed in the positioning cavity 17, and the second positioning driver 19 drives the third positioning member 18 to move close to the first positioning member 14 and the second positioning member 15 while the first positioning driver 16 drives the second positioning member 15 to move close to the first positioning member 14 and the second positioning member 15, so that the positioning cavity 17 is reduced until the first positioning member 14, the second positioning member 15 and the third positioning member 18 respectively collide with the edges of the product 24, so as to accurately position the product 24.

In this embodiment, the second positioning member 15 is provided with a plurality of second positioning columns 20, and the plurality of second positioning columns 20 are arranged in a linear arrangement. By the interference of the plurality of second positioning columns 20 with the edges of the product 24, the contact area between the product 24 and the second positioning piece 15 is reduced, and the risk of abrasion to the product 24 is reduced.

In this embodiment, the machine 1 is provided with a plurality of positioning sliding grooves 21, the plurality of positioning sliding grooves 21 are respectively arranged in one-to-one correspondence with the plurality of second positioning columns 20, and the second positioning columns 20 penetrate through the positioning sliding grooves 21. The positioning chute 21 is used for the second positioning column 20 to reciprocate, so that the second positioning column 20 and the machine 1 are compact in structure.

In this embodiment, the first positioning member 14 includes a plurality of first positioning columns 22, the plurality of first positioning columns 22 are L-shaped and disposed on the machine 1, the third positioning member 18 is provided with a plurality of third positioning columns 23, the third positioning columns 23 are located in the separation gaps 5, and the plurality of first positioning columns 22, the plurality of second positioning columns 20 and the plurality of third positioning columns 23 enclose a positioning cavity 17. The first positioning column 22, the second positioning column 20 and the third positioning column 23 respectively collide with the peripheral edges of the product 24, so that the risk of abrasion of the product 24 is reduced, and the positioning accuracy is improved.

Specifically, the machine 1 is provided with a plurality of suction holes 25, and the suction holes 25 are located in the positioning cavity 17; when the product 24 is positioned, the suction holes 25 suck the product 24 on the machine 1, so as to improve the position accuracy and stability of the product 24.

In this embodiment, the material taking and placing device 27 includes a material loading manipulator 36, a transferring manipulator 37 and a material discharging manipulator 38, the material loading manipulator 36 is switched between the material feeding device 28 and the positioning and separating device 33, the transferring manipulator 37 is switched between the positioning and separating device 33 and the turntable 31, and the material discharging manipulator 38 is switched between the turntable 31 and the material receiving device 29.

In practical application, the feeding manipulator 36 picks up the product 24 supplied by the feeding device 28, and places the product 24 in the positioning cavity 17 of the positioning and separating device 33, and the positioning and separating device 33 positions the product 24 and separates the FPC board from the PI sheet; the transfer manipulator 37 picks up the product 24 with the PI piece separated to the carrier 32 at the loading station; when the blanking manipulator 38 picks up the tested product 24 carried by the carrier 32 at the blanking station to the receiving device 29.

In this embodiment, the feeding device 28 and/or the receiving device 29 includes a receiving frame 39 mounted on the base 26, a tray feeding mechanism 40 disposed at a distance from the receiving frame 39, a transfer driving mechanism 41 mounted on the base 26, and a lifting transfer table 42 connected to an output end of the transfer driving mechanism 41, where the transfer driving mechanism 41 is used to drive the lifting transfer table 42 to reciprocate below a tray receiving opening of the receiving frame 39, below the material taking and placing device 27, and below a tray feeding opening of the tray feeding mechanism 40. Since the structure of the feeding device 28 is the same as that of the receiving device 29, the working principles of the feeding device 28 and the receiving device 29 are the same, so the working principles of the receiving device 29 are not described again.

In practical application, the tray supply mechanism 40 stacks a large number of trays fully loaded with the products 24, the transfer driving mechanism 41 drives the lifting transfer table 42 to move below the tray supply opening of the tray supply mechanism 40, the table surface of the lifting transfer table 42 lifts and carries the tray fully loaded with the products 24 supplied by the tray supply mechanism 40, the tray supply mechanism 40 supplies the tray at the bottommost layer to the table surface of the lifting transfer table 42, then, the transfer driving mechanism 41 drives the lifting transfer table 42 to move below the loading manipulator 36 of the loading and unloading device 27 along with the tray fully loaded with the products 24, the loading manipulator 36 sequentially picks up the products 24 on the tray, and when no products 24 are on the tray, the transfer driving mechanism 41 drives the lifting transfer table 42 to move below the tray receiving opening of the tray receiving frame 39 along with the empty tray, the lifting transfer table 42 lifts and places the empty tray in the tray receiving frame 39, and the tray receiving frame 39 stacks and stores the empty tray so that an operator or the manipulator can take up and unload the tray in the tray receiving frame 39 repeatedly, and the operations of loading and unloading tray receiving and loading are repeated.

In this embodiment, the number of the bending devices 34 is one or more; according to different bending processes, the bending devices 34 bend and shape the FPC board of the product 24 according to actual bending requirements.

All technical features in the embodiment can be freely combined according to actual needs.

The foregoing embodiments are preferred embodiments of the present utility model, and in addition, the present utility model may be implemented in other ways, and any obvious substitution is within the scope of the present utility model without departing from the concept of the present utility model.

Claims

1. An automatic bending test machine for an FPC board is characterized in that: the bending test device is positioned between the feeding device and the receiving device, the material taking and placing end of the material taking and placing device is movably arranged above the feeding device, the receiving device and the bending test device, and the bending test device comprises a rotating driving mechanism arranged on the base, a rotary table connected with the output end of the rotating driving mechanism, a plurality of carriers respectively arranged on the circumference of the rotary table, and a positioning and separating device, a bending device and a testing device which are distributed outside the circumference of the rotary table.

2. The FPC board bending test automaton according to claim 1, wherein: the positioning and separating device comprises a machine table arranged on the machine table, a positioning mechanism arranged on the machine table, a pressing mechanism movably arranged on the machine table and a separating mechanism arranged on the machine table, wherein the machine table is provided with a separating notch communicated with the positioning end of the positioning mechanism, the separating mechanism comprises a Y-axis moving driver arranged on the machine table, a rotating driver connected with the output end of the Y-axis moving driver, a rotating block connected with the output end of the rotating driver, a clamping driver arranged at the eccentric position of the rotating block and two separating clamping jaws respectively arranged at two clamping ends of the clamping driver, the clamping driver is used for driving the two separating clamping jaws to be close to or far away from each other, and the separating notch is used for providing a space for avoiding for the two separating clamping jaws.

3. The FPC board bending test automaton according to claim 2, wherein: the separation clamping jaw is a cylindrical rod.

4. The FPC board bending test automaton according to claim 2, wherein: the positioning mechanism comprises a first positioning piece arranged on the base, a second positioning piece arranged on the base in a moving mode and a first positioning driver which is arranged on the base and used for driving the second positioning piece to be close to or far away from the first positioning piece, and the first positioning piece and the second positioning piece are arranged to form a positioning cavity in a surrounding mode.

5. The automatic bending test machine for the FPC board according to claim 4, wherein: the positioning mechanism further comprises a third positioning piece arranged on the base in a moving mode and a second positioning driver which is arranged on the base and used for driving the third positioning piece to be close to or far away from the first positioning piece and the second positioning piece, the third positioning piece protrudes to the separation notch, and the first positioning piece, the second positioning piece and the third positioning piece are enclosed to form a positioning cavity.

6. The FPC board bending test automaton according to claim 2, wherein: the pressing mechanism comprises an X-axis moving driver arranged on the base, a pressing driver arranged at the output end of the X-axis moving driver and a pressing piece arranged at the output end of the pressing driver, wherein the X-axis moving driver is used for driving the pressing driver to be close to or far away from the positioning end of the positioning mechanism, and the pressing piece is positioned above the positioning end of the positioning mechanism.

7. The FPC board bending test automaton according to claim 1, wherein: the material taking and discharging device comprises a material feeding manipulator, a material transferring manipulator and a material discharging manipulator, wherein the material feeding manipulator is switched between the material feeding device and the positioning and separating device, the material transferring manipulator is switched between the positioning and separating device and the rotary table, and the material discharging manipulator is switched between the rotary table and the material collecting device.

8. The FPC board bending test automaton according to claim 1, wherein: the feeding device or/and the receiving device comprises a receiving tray frame arranged on the machine base, a tray feeding mechanism arranged at a distance from the receiving tray frame, a transfer driving mechanism arranged on the machine base and a lifting transfer table connected with the output end of the transfer driving mechanism, wherein the transfer driving mechanism is used for driving the lifting transfer table to reciprocate below a tray receiving opening of the receiving tray frame, below the material taking and discharging device and below a tray feeding opening of the tray feeding mechanism.

9. The FPC board bending test automaton according to claim 1, wherein: the number of the bending devices is one or more.

10. The automatic bending test machine for the FPC board according to claim 4 or 5, wherein: the machine is provided with a suction hole, and the suction hole is positioned in the positioning cavity.