Electroplating frame

By using upper and lower frames made of insulating materials and magnet adsorption fixing and electroplating combined with conductive needles, the complex operation and accuracy problems of existing electroplating fixtures are solved, and a high-precision and high-reliability electroplating process is achieved.

CN223163520UActive Publication Date: 2025-07-29KUNSHAN BOTONG MASCH EQUIP CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202421834653.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-31
Publication Date
2025-07-29
Estimated Expiration
2034-07-31

AI Technical Summary

Technical Problem

The existing electroplating fixtures have problems such as complex upper and lower plate steps, metal spring sheets are prone to breaking the battery plate, poor contact accuracy and easy to fall off, resulting in high production costs and difficult to be suitable for industrial production.

Method used

The upper frame and the lower frame are made of insulating material, fixed by adsorption of magnets, and electrically connected by first conductive needles and second conductive needles are avoided to use the spring sheet and ensure the accuracy of conductive point positions and insulation.

Benefits of technology

It simplifies the operation process, improves the accuracy and reliability of the conductive point positions, avoids the detachment of the insulating layer, and reduces production costs.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223163520U_ABST
    Figure CN223163520U_ABST
Patent Text Reader

Abstract

The utility model discloses a frame for electroplating, which comprises an upper frame, a lower frame, a magnet, a first conductive needle and a second conductive needle, the upper frame and the lower frame are both made of insulating materials, the upper frame is provided with first electroplating ports in a penetrating manner, and the lower frame is provided with second electroplating ports in the same number as the first electroplating ports in a penetrating manner; one first electroplating opening corresponds to one second electroplating opening, a first connecting base is arranged on the inner circumferential wall of each first electroplating opening in a protruding mode, a second connecting base is arranged on the inner circumferential wall of each second electroplating opening in a protruding mode, a first abutting table is arranged at the first end of each first conductive needle in the radial direction in a protruding mode, and the second end of each second conductive needle penetrates through the corresponding second connecting hole; the upper frame and the lower frame are both provided with magnets, the workpiece is in a plate shape, the first abutting table can abut against the front face of the workpiece, and the second end of the first conductive needle and the second end of the second conductive needle can be electrically connected with electroplating equipment through wires. The utility model has the advantages of convenient use, high contact precision and higher reliability.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to electroplating tools, in particular to a frame for electroplating. Background Art

[0002] At present, the metallization of solar panels usually adopts silver paste technology, and metal electrodes are prepared by means of screen printing of low-temperature silver paste. However, low-temperature pastes basically rely on imports, and the price is relatively high. Moreover, heterojunction cells have silver electrodes on both the front and back sides, increasing the consumption of silver paste, making it difficult to reduce the production cost of heterojunction cells. Therefore, a process for preparing electrodes on solar panels by electroplating has emerged. However, electroplating solar panels requires the use of electroplating jigs. Currently, existing electroplating jigs usually have the problem that the steps of loading and unloading are too complex. In addition, currently existing electroplating jigs are usually made of a metal frame plus metal spring sheets and are insulated by wrapping rubber on the surface of the metal frame. The metal spring sheets are prone to break the battery panels during use. In addition, due to the elasticity of the metal spring sheets themselves, they are deformed due to elasticity when contacting the battery panels, which easily leads to poor accuracy of the conductive points during contact. In addition, the rubber insulation layer is prone to falling off and requires frequent maintenance, resulting in an increase in production costs, which is not conducive to industrial production and large-scale promotion. Summary of the Utility Model

[0003] In order to overcome the above defects, the utility model provides a frame for electroplating, which has the advantages of convenient use, high contact accuracy and higher reliability.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a frame for electroplating, comprising: an upper frame, a lower frame, magnets, a first conductive needle and a second conductive needle. Both the upper frame and the lower frame are made of insulating materials. A first electroplating port is penetrated and opened on the upper frame, and a second electroplating port with the same number as the first electroplating port is penetrated and opened on the lower frame. One first electroplating port corresponds to one second electroplating port. A first connecting seat protrudes from the inner peripheral wall of the first electroplating port, and a second connecting seat protrudes from the inner peripheral wall of the second electroplating port. Both the first conductive needle and the second conductive needle are made of conductive materials. A first abutting platform protrudes radially from the first end of the first conductive needle. A first connecting hole is penetrated and opened on the first connecting seat, and the second end of the first conductive needle is inserted through the first connecting hole. A second abutting platform protrudes radially from the first end of the second conductive needle. A second connecting hole is penetrated and opened on the second connecting seat, and the second end of the second conductive needle is inserted through the second connecting hole. Magnets are arranged on both the upper frame and the lower frame, and the upper frame and the lower frame can be mutually adsorbed through the magnets. The first abutting platform and the second abutting platform face each other. The workpiece is in a plate shape. The first abutting platform can abut against the front side of the workpiece, and the second abutting platform can abut against the back side of the workpiece. The second ends of the first conductive needle and the second conductive needle can be electrically connected to an electroplating device through wires.

[0005] Optionally, it further includes a guide post. A fixing hole is formed on the lower frame, and a connecting hole is formed on the upper frame. A linear bearing is arranged in the connecting hole. A fixing seat protrudes radially from the first end of the guide post. The second end of the guide post can pass through the fixing hole, and the fixing seat can be fixed to the lower frame by a first bolt. The fixing seat is located on the side of the lower frame away from the upper frame, and the second end of the guide post can be slidably connected to the linear bearing.

[0006] Optionally, it further includes a first compression spring and a foot pad. The first end of the first compression spring is fixed to the side of the upper frame facing the lower frame. A first blind hole is formed on the side of the lower frame facing the upper frame. The second end of the first compression spring can abut against the bottom wall of the first blind hole. The foot pad is fixed to the side of the lower frame away from the upper frame. The foot pad is made of a flexible material, and the height of the foot pad is greater than the height of the fixing seat.

[0007] Optionally, it further includes two handles. The handles are oppositely fixed to the side of the upper frame away from the lower frame. A second blind hole is formed on the side of the upper frame facing the lower frame, and a third blind hole is formed on the side of the lower frame facing the upper frame. Magnets are fixed in the second blind hole and the third blind hole by adhesive.

[0008] Optionally, it further includes a second compression spring and a third compression spring. The second end of the first conductive pin is slidably connected to the first connection hole. The second compression spring is sleeved on the first conductive pin, and both ends of the second compression spring are fixed to the first connection seat and the first abutting platform respectively. The second end of the second conductive pin is slidably connected to the second connection hole. The third compression spring is sleeved on the second conductive pin, and both ends of the third compression spring are fixed to the second connection seat and the second abutting platform respectively. Both the first conductive pin and the second conductive pin are made of copper alloy.

[0009] Optionally, a first wire groove capable of accommodating a wire is formed on the side of the upper frame away from the lower frame, and a second wire groove capable of accommodating a wire is formed on the side of the lower frame away from the upper frame. A long strip-shaped first conductive area is arranged on the side wall of the upper frame. The first conductive pin is electrically connected to the first conductive area through a wire. A long strip-shaped second conductive area is arranged on the side wall of the lower frame. The second conductive pin is electrically connected to the second conductive area through a wire. The electroplating equipment is electrically connected to the first conductive area and the second conductive area through a conductive clip.

[0010] Optionally, the first conductive area is a first metal layer covering the side wall of the upper frame, the second conductive area is a second metal layer covering the side wall of the upper frame, the wire is fixed in the first wire groove and the second wire groove by adhesive, and the wire is a copper alloy enameled wire.

[0011] Optionally, it further includes a positioning member. A positioning groove is provided on one side of the lower frame facing the upper frame. The positioning member is made of an insulating material and is detachably fixed in the positioning groove through a second bolt. The end of the positioning member can extend into the second electroplating port, and the side wall of the workpiece can abut against the end of the positioning member.

[0012] Optionally, the number of the first electroplating ports is twenty, and eight first connection seats are arranged in each first electroplating port, and eight second connection seats are arranged in each second electroplating port.

[0013] The beneficial technical effects of the present utility model are as follows: The electroplating frame includes an upper frame, a lower frame, a magnet, a first conductive needle, and a second conductive needle. During use, first place the lower frame flat on the ground, place the workpiece in the second electroplating port of the lower frame and abut the back of the workpiece against the second abutting platform, and then cover the upper frame on the lower frame. At this time, the upper frame and the lower frame are adsorbed by the magnet, and the first abutting platform abuts the front of the workpiece to fix the workpiece. Then, the first conductive needle and the second conductive needle are electrically connected to the electroplating equipment through wires. Then, put the adsorbed upper frame, the lower frame, and the fixed workpiece together into the electroplating bath. The electroplating solution can contact the workpiece through the first electroplating port and the second electroplating port. At this time, the electroplating equipment is powered on to electroplate the workpiece. Since the upper frame and the lower frame are adsorbed to each other by the magnet, tools are not needed when separating or fixing the upper frame and the lower frame, which is more convenient to use. In addition, the first conductive needle and the second conductive needle are used to contact the workpiece to form conductive points. Compared with the existing method of using spring pieces to contact the workpiece, since the first conductive needle and the second conductive needle do not have elasticity like spring pieces and are not easily deformed when contacting the workpiece, the accuracy of the conductive points is higher. At the same time, since both the upper frame and the lower frame are made of insulating materials, no insulating layer needs to be covered on the upper frame and the lower frame. Therefore, there is no situation where the insulating layer detaches during use, resulting in the insulation failure of the frame, and the reliability is also higher. It has the advantages of convenient use, high contact accuracy, and higher reliability. Description of the Drawings

[0014] Figure 1 is the three-dimensional view of the whole machine of the present utility model from the first perspective;

[0015] Figure 2 is the three-dimensional view of the whole machine of the present utility model from the second perspective;

[0016] Figure 3 is the front view of the lower frame of the present utility model;

[0017] Figure 4 is the side view of the upper frame and the lower frame of the present utility model in a separated state;

[0018] Figure 5It is a top view of the upper frame and the lower frame of the present utility model in a combined state;

[0019] Figure 6 It is a three-dimensional view of the upper frame of the present utility model;

[0020] Figure 7 It is a three-dimensional view of the lower frame of the present utility model;

[0021] Figure 8 It is Figure 6 a partial enlarged view of the position A in

[0022] Figure 9 It is Figure 7 a partial enlarged view of the position B in

[0023] Wherein:

[0024] 1. Upper frame; 2. Lower frame; 3. Magnet; 4. First conductive pin; 5. Second conductive pin;

[0025] 6. First connection seat; 7. Second connection seat; 8. First electroplating port; 9. Second electroplating port;

[0026] 10. Workpiece; 11. Guide post; 12. Connection hole; 13. First compression spring; 14. Foot pad;

[0027] 15. Handle; 16. Second conductive area; 17. Positioning part. Specific embodiments

[0028] In order to more clearly understand the technical means of the present utility model and implement it according to the content of the specification, the following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model but not to limit the scope of the present utility model.

[0029] This specific embodiment details the frame for electroplating described in the present application, as Figures 1-9As shown in the figure, the frame for electroplating includes: an upper frame 1, a lower frame 2, a magnet 3, a first conductive needle 4, and a second conductive needle 5. Both the upper frame 1 and the lower frame 2 are made of insulating materials. A first electroplating port 8 is formed through the upper frame 1, and a second electroplating port 9 with the same number as the first electroplating port 8 is formed through the lower frame 2. One first electroplating port 8 corresponds to one second electroplating port 9. A first connecting seat 6 protrudes from the inner peripheral wall of the first electroplating port 8, and a second connecting seat 7 protrudes from the inner peripheral wall of the second electroplating port 9. Both the first conductive needle 4 and the second conductive needle 5 are made of conductive materials. A first abutting platform protrudes radially from the first end of the first conductive needle 4. A first connecting hole is formed through the first connecting seat 6, and the second end of the first conductive needle 4 is inserted into the first connecting hole. A second abutting platform protrudes radially from the first end of the second conductive needle 5. A second connecting hole is formed through the second connecting seat 7, and the second end of the second conductive needle 5 is inserted into the second connecting hole. Magnets 3 are provided on both the upper frame 1 and the lower frame 2, and the upper frame 1 and the lower frame 2 can be adsorbed to each other through the magnets 3. The first abutting platform and the second abutting platform face each other. The workpiece 10 is in a plate shape. The first abutting platform can abut against the front surface of the workpiece 10, and the second abutting platform can abut against the back surface of the workpiece 10. The second ends of the first conductive needle 4 and the second conductive needle 5 can be electrically connected to the electroplating equipment through wires. During use, first place the lower frame 2 flat on the ground, place the workpiece 10 in the second electroplating port 9 of the lower frame 2 and abut the back surface of the workpiece 10 against the second abutting platform, and then cover the upper frame 1 on the lower frame 2. At this time, the upper frame 1 and the lower frame 2 are adsorbed to each other through the magnets 3, and the first abutting platform abuts against the front surface of the workpiece, realizing the fixation of the workpiece 10. Then, the first conductive needle 4 and the second conductive needle 5 are electrically connected to the electroplating equipment through wires. Then, the adsorbed upper frame 1, lower frame 2, and the fixed workpiece 10 are placed together in the electroplating tank. The electroplating solution can contact the workpiece 10 through the first electroplating port 8 and the second electroplating port 9. At this time, the electroplating equipment is powered on to electroplate the workpiece. Since the upper frame 1 and the lower frame 2 are adsorbed to each other through the magnets 3, tools are not required when separating or fixing the upper frame 1 and the lower frame 2, making it more convenient to use. In addition, conductive points are formed by contacting the workpiece with the first conductive needle 4 and the second conductive needle 5. Compared with the existing method of using spring pieces to contact the workpiece 10, since the first conductive needle 4 and the second conductive needle 5 do not have elasticity like spring pieces and are not easily deformed when contacting the workpiece, the accuracy of the conductive points is higher. At the same time, since both the upper frame 1 and the lower frame 2 are made of insulating materials, there is no need to cover an insulating layer on the upper frame 1 and the lower frame 2. Therefore, there is no situation where the insulating layer detaches and causes the frame to lose insulation during use, and the reliability is also higher. It has the advantages of convenient use, high contact accuracy, and higher reliability.

[0030] Optionally, in this embodiment, it further includes a guide post 11. A fixing hole is formed in the lower frame 2, and a connection hole 12 is formed in the upper frame 1. A linear bearing is arranged in the connection hole 12. A fixing seat protrudes radially from the first end of the guide post 11. The second end of the guide post 11 can pass through the fixing hole, and the fixing seat can be fixed to the lower frame 2 by a first bolt. The fixing seat is located on the side of the lower frame 2 away from the upper frame 1, and the second end of the guide post 11 can be slidably connected to the linear bearing. The guide post 11 can play a guiding role to ensure that the upper frame 1 and the lower frame 2 can be accurately matched, and improve the accuracy of the contact point between the workpiece 10 and the first abutting platform.

[0031] Optionally, in this embodiment, it further includes a first compression spring 13 and a foot pad 14. The first end of the first compression spring 13 is fixed to the side of the upper frame 1 facing the lower frame 2. A first blind hole is formed in the side of the lower frame 2 facing the upper frame 1. The second end of the first compression spring 13 can abut against the bottom wall of the first blind hole. The foot pad 14 is fixed to the side of the lower frame 2 away from the upper frame 1. The foot pad 14 is made of a flexible material, and the height of the foot pad 14 is greater than the height of the fixing seat. The first compression spring 13 can play a buffering role to avoid excessive impact when the upper frame 1 covers the lower frame 2 and cause the first abutting platform to damage the workpiece 10. When the lower frame 2 is placed flat on the ground, the foot pad 14 can lift the lower frame 2 to avoid abrasion.

[0032] Optionally, in this embodiment, it further includes two handles 15. The handles 15 are fixedly arranged oppositely on the side of the upper frame 1 away from the lower frame 2. A second blind hole is formed in the side of the upper frame 1 facing the lower frame 2, and a third blind hole is formed in the side of the lower frame 2 facing the upper frame 1. The magnet 3 is fixed in the second blind hole and the third blind hole by glue. The provision of the handles 15 can facilitate the user to separate the upper frame 1 and the lower frame 2.

[0033] Optionally, in this embodiment, it further includes a second compression spring and a third compression spring. The second end of the first conductive pin 4 is slidably connected to the first connection hole. The second compression spring is sleeved on the first conductive pin 4, and both ends of the second compression spring are respectively fixed to the first connection seat 6 and the first abutting platform. The second end of the second conductive pin 5 is slidably connected to the second connection hole. The third compression spring is sleeved on the second conductive pin 5, and both ends of the third compression spring are respectively fixed to the second connection seat 7 and the second abutting platform. Both the first conductive pin 4 and the second conductive pin 5 are made of copper alloy. When the front surface of the workpiece 10 contacts the first abutting platform, the second compression spring compresses and provides buffering to avoid damage to the workpiece 10. When the back surface of the workpiece 10 contacts the second abutting platform, the third compression spring compresses and provides buffering to avoid damage to the workpiece 10. At the same time, the first abutting platform can squeeze the workpiece 10 under the drive of the second compression spring, and the second abutting platform can squeeze the workpiece 10 under the drive of the third compression spring, thereby improving the fixing firmness of the workpiece 10.

[0034] Optionally, in this embodiment, a first wire groove for accommodating wires is provided on one side of the upper frame 1 away from the lower frame 2, and a second wire groove for accommodating wires is provided on one side of the lower frame 2 away from the upper frame 1. A strip-shaped first conductive area is provided on the side wall of the upper frame 1. The first conductive pins 4 are electrically connected to the first conductive area through wires. A strip-shaped second conductive area 16 is provided on the side wall of the lower frame 2. The second conductive pins 5 are electrically connected to the second conductive area 16 through wires. The electroplating equipment is electrically connected to the first conductive area and the second conductive area 16 through conductive clips. The provision of the first wire groove and the second wire groove facilitates wire management and avoids wire exposure.

[0035] Optionally, in this embodiment, the first conductive area is a first metal layer covering the side wall of the upper frame 1, the second conductive area 16 is a second metal layer covering the side wall of the upper frame 1, and the wires are fixed in the first wire groove and the second wire groove by adhesive. The wires are copper alloy enameled wires.

[0036] Optionally, in this embodiment, a positioning member 17 is further included. A positioning groove is provided on the side of the lower frame 2 facing the upper frame 1. The positioning member 17 is made of insulating material. The positioning member 17 is detachably fixed in the positioning groove through a second bolt. The end of the positioning member 17 can extend into the second electroplating port 9. The side wall of the workpiece 10 can abut against the end of the positioning member 17. The positioning member 17 can play a role in positioning the workpiece 10, improving the accuracy of the contact point between the workpiece 10 and the second abutting platform. At the same time, the side wall of the workpiece 10 abutting against the end of the positioning member 17 can prevent the workpiece 10 from shaking. In addition, the positioning member 17 is detachably fixed in the positioning groove through a second bolt. When the positioning member 17 is damaged, only the positioning member 17 needs to be replaced separately, rather than replacing the entire lower frame 2.

[0037] Optionally, in this embodiment, the number of the first electroplating ports 8 is twenty, and eight first connection seats 6 are provided in each first electroplating port 8. Eight second connection seats 7 are provided in each second electroplating port 9.

[0038] Using the electroplating frame in this embodiment has the advantages of convenient use, high contact accuracy, and higher reliability.

Claims

1. A frame for electroplating, characterized in that, Comprising: an upper frame (1), a lower frame (2), a magnet (3), a first conductive pin (4) and a second conductive pin (5). Both the upper frame (1) and the lower frame (2) are made of insulating materials. A first electroplating port (8) is penetrated and provided on the upper frame (1), and a second electroplating port (9) with the same number as the first electroplating port (8) is penetrated and provided on the lower frame (2). One first electroplating port (8) corresponds to one second electroplating port (9). A first connecting seat (6) is convexly provided on the inner peripheral wall of the first electroplating port (8), and a second connecting seat (7) is convexly provided on the inner peripheral wall of the second electroplating port (9). Both the first conductive pin (4) and the second conductive pin (5) are made of conductive materials. A first abutting platform is convexly provided along the radial direction at the first end of the first conductive pin (4). A first connecting hole is penetrated and provided on the first connecting seat (6), and the second end of the first conductive pin (4) is penetrated through the first connecting hole. A second abutting platform is convexly provided along the radial direction at the first end of the second conductive pin (5). A second connecting hole is penetrated and provided on the second connecting seat (7), and the second end of the second conductive pin (5) is penetrated through the second connecting hole. Magnets (3) are provided on both the upper frame (1) and the lower frame (2). The upper frame (1) and the lower frame (2) can be mutually adsorbed through the magnets (3). The first abutting platform and the second abutting platform face each other. The workpiece (10) is in a plate shape. The first abutting platform can abut against the front surface of the workpiece (10), and the second abutting platform can abut against the back surface of the workpiece (10). The second ends of the first conductive pin (4) and the second conductive pin (5) can be electrically connected to an electroplating device through a wire.

2. The plating frame according to claim 1, characterized in that: It further includes a guide post (11). A fixing hole is provided on the lower frame (2), and a connecting hole (12) is provided on the upper frame (1). A linear bearing is provided in the connecting hole (12). A fixing seat is convexly provided along the radial direction at the first end of the guide post (11). The second end of the guide post (11) can penetrate out of the fixing hole, and the fixing seat can be fixed to the lower frame (2) through a first bolt. The fixing seat is located on the side of the lower frame (2) away from the upper frame (1), and the second end of the guide post (11) can be slidably connected to the linear bearing.

3. The plating frame according to claim 2, characterized in that: It further includes a first compression spring (13) and a foot pad (14). The first end of the first compression spring (13) is fixed to the surface of the upper frame (1) facing the lower frame (2). A first blind hole is provided on the surface of the lower frame (2) facing the upper frame (1). The second end of the first compression spring (13) can abut against the bottom wall of the first blind hole. The foot pad (14) is fixed to the side of the lower frame (2) away from the upper frame (1). The foot pad (14) is made of a flexible material, and the height of the foot pad (14) is greater than the height of the fixing seat.

4. The frame for electroplating according to claim 3, characterized in that: It further includes two handles (15). The handles (15) are oppositely fixed to the side of the upper frame (1) away from the lower frame (2). A second blind hole is provided on the surface of the upper frame (1) facing the lower frame (2), and a third blind hole is provided on the surface of the lower frame (2) facing the upper frame (1). The magnets (3) are fixed in the second blind hole and the third blind hole through an adhesive.

5. The electroplating frame according to claim 4, wherein: The invention also includes a second compression spring and a third compression spring, wherein the second end of the first conductive needle (4) is slidably connected to the first connecting hole, the second compression spring is sleeved on the first conductive needle (4), and the two ends of the second compression spring are respectively fixed to the first connecting seat (6) and the first abutting platform, the second end of the second conductive needle (5) is slidably connected to the second connecting hole, the third compression spring is sleeved on the second conductive needle (5), and the two ends of the third compression spring are respectively fixed to the second connecting seat (7) and the second abutting platform, and the first conductive needle (4) and the second conductive needle (5) are both made of copper alloy.

6. The plating frame according to claim 5, characterized in that: The upper frame (1) is provided with a first wire groove capable of accommodating a wire on a side away from the lower frame (2); the lower frame (2) is provided with a second wire groove capable of accommodating a wire on a side away from the upper frame (1); a first long conductive area is provided on the side wall of the upper frame (1); a first conductive needle (4) is electrically connected to the first conductive area via a wire; a second long conductive area (16) is provided on the side wall of the lower frame (2); a second conductive needle (5) is electrically connected to the second conductive area (16) via a wire; and an electroplating device is electrically connected to the first conductive area and the second conductive area (16) via a conductive clip.

7. The frame for electroplating according to claim 6, wherein: The first conductive area is a first metal layer covering the side wall of the upper frame (1), the second conductive area (16) is a second metal layer covering the side wall of the upper frame (1), the wires are fixed in the first wire trough and the second wire trough by adhesive, and the wires are copper alloy enameled wires.

8. The plating frame according to claim 7, characterized in that: The lower frame (2) is provided with a positioning groove on a side facing the upper frame (1). The positioning member (17) is made of an insulating material. The positioning member (17) is detachably fixed in the positioning groove by a second bolt. The end of the positioning member (17) can extend into the second electroplating port (9), and the side wall of the workpiece (10) can abut against the end of the positioning member (17).

9. The plating frame according to claim 1, characterized in that: The number of the first electroplating ports (8) is twenty, eight first connecting seats (6) are arranged in each first electroplating port (8), and eight second connecting seats (7) are arranged in each second electroplating port (9).