Connector

Abstract

The present application provides a connector. The connector comprises: a housing assembly, wherein the housing assembly is provided with an accommodating cavity, and two ends of the housing assembly are respectively provided with a connecting opening and a mounting opening that are communicated with the accommodating cavity; a PIN assembly, wherein the PIN assembly is detachably arranged in the accommodating cavity; a terminal fixing assembly, wherein the terminal fixing assembly covers the mounting opening; and a wire harness assembly, wherein one end of the wire harness assembly extends into the terminal fixing assembly and is connected to the PIN assembly by means of the terminal fixing assembly.

Description

A connector

[0001] This application claims priority to Chinese Patent Application No. 202422816531X, filed with the Chinese Patent Office on November 18, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery testing equipment, and more specifically, to a connector. Background Technology

[0003] Currently, the connectors used in the battery pack test harnesses are injection molded as a single piece, with the pins and plastic housing being non-replaceable. If a pin is damaged, the entire connector or the entire test harness becomes unusable, reducing utilization and increasing costs. Furthermore, during battery pack testing, the connectors of the test harness are mated with the battery pack. Because the contact between the connector pins and the mating metal terminals is surface contact, repeated mating and unmapping can easily cause wear and tear on the pins of new battery pack connectors. Technical issues

[0004] When the battery pack is installed in the vehicle, wear on the battery pack connector pins prevents proper assembly with the vehicle-side connector, leading to abnormal signal transmission. Therefore, the relevant technology suffers from poor connector performance. Technical solutions

[0005] This application provides a connector, comprising: a housing assembly having a receiving cavity, and two ends of the housing assembly having a connection opening and a mounting opening communicating with the receiving cavity, respectively; a pin assembly having at least a portion detachably disposed within the receiving cavity; a terminal fixing assembly having at least a portion covering the mounting opening; and a wire harness assembly having one end extending into the terminal fixing assembly and connected to the pin assembly via the terminal fixing assembly. Beneficial effects

[0006] The connector provided in this application has at least a portion of the PIN assembly detachably disposed in the receiving cavity, and the wire harness assembly is connected to the PIN assembly through the terminal fixing assembly. Therefore, when the PIN assembly is damaged or needs to be replaced, it is only necessary to remove the PIN assembly from the receiving cavity and replace it with a new PIN assembly, instead of replacing the entire connector. This effectively reduces the testing cost of the battery pack. Attached Figure Description

[0007] Figure 1 shows a partial structural schematic diagram of the connector according to some implementations of this application;

[0008] Figure 2 shows an exploded view of the connector for some implementations of this application;

[0009] Figure 3 shows a schematic diagram of the housing body of the connector in Figure 2;

[0010] Figure 4 shows a schematic diagram of the snap-fit ​​part of the connector in Figure 2;

[0011] Figure 5 shows a schematic diagram of the internal structure of the PIN pin retaining shell of the connector in Figure 2;

[0012] Figure 6 shows a schematic diagram of the internal structure of the terminal fixing assembly of the connector in Figure 2.

[0013] The above figures include the following reference numerals:

[0014] 10. Housing assembly; 11. Receiving cavity; 111. Stepped surface; 12. Connecting opening; 13. Mounting opening; 14. Housing body; 141. Connecting shaft; 142. Limiting protrusion; 15. Snap-fit ​​part; 151. Snap-fit ​​protrusion; 152. Snap-fit ​​body; 153. Connecting arm; 1531. First connecting section; 1532. Second connecting section; 16. Reset component; 161. Mounting groove; 20. PIN assembly ; 21. Stepped structure; 22. PIN pin fixing shell; 221. PIN pin hole; 2211. Small diameter section; 2212. Large diameter section; 222. Anti-fooling groove; 23. Spring PIN pin; 30. Terminal fixing assembly; 31. Mounting cavity; 32. Window; 40. Wire harness assembly; 50. Fixing cover plate; 51. Clearance through hole; 60. Wire harness fastening plate; 61. Upper end plate; 62. Lower end plate; 63. Wire clamping hole.

[0015] Implementation methods of this application

[0016] As shown in Figures 1 to 6, the connector in this application includes a housing assembly 10, a pin assembly 20, a terminal fixing assembly 30, and a wire harness assembly 40. The housing assembly 10 has a receiving cavity 11, and both ends of the housing assembly 10 are respectively provided with a connection opening 12 and a mounting opening 13 communicating with the receiving cavity 11; at least a portion of the pin assembly 20 is detachably disposed in the receiving cavity 11; at least a portion of the terminal fixing assembly 30 covers the mounting opening 13; one end of the wire harness assembly 40 extends into the terminal fixing assembly 30 and is connected to the pin assembly 20 through the terminal fixing assembly 30.

[0017] When using the connector of this application, since at least a portion of the PIN assembly 20 is detachably disposed within the receiving cavity 11, and the wiring harness assembly 40 is connected to the PIN assembly 20 via the terminal fixing assembly 30, when the PIN assembly 20 is damaged or needs to be replaced, it is only necessary to remove the PIN assembly 20 from the receiving cavity 11 and replace it with a new PIN assembly 20, without having to replace the entire connector, thereby effectively reducing the testing cost of the battery pack. Therefore, the connector of this application effectively solves the problem of poor connector performance in related technologies.

[0018] In some implementations of this application, the housing assembly 10 includes a housing body 14 and a snap-fit ​​portion 15. The housing body 14 has a receiving cavity 11, a connection opening 12, and a mounting opening 13. The snap-fit ​​portion 15 is disposed on the outer surface of the housing body 14 and is movably connected to the housing body 14, and the end of the snap-fit ​​portion 15 near the connection opening 12 has a snap-fit ​​protrusion 151. In this embodiment, after the connector is connected to the corresponding socket of the battery pack through the connection opening 12, the connector can snap-fit ​​with the corresponding position of the battery pack through the snap-fit ​​protrusion 151, thereby achieving self-locking at the interface between the connector and the battery pack, thus ensuring the stability of the connection between the connector and the battery pack and preventing the connector from falling off. In some implementations, a groove that mates with the snap-fit ​​protrusion 151 can be provided at the position of the battery pack corresponding to the snap-fit ​​protrusion 151 to achieve locking between the connector and the battery pack.

[0019] Specifically, the latching part 15 includes a latching body 152 and at least two connecting arms 153. The latching body 152 is spaced apart from the housing body 14. The two ends of the latching body 152 correspond to the connection opening 12 and the mounting opening 13, respectively. The end of the latching body 152 near the connection opening 12 has a latching protrusion 151. The two connecting arms 153 are correspondingly located on both sides of the latching body 152 along its length, with one end of the connecting arm 153 connected to the latching body 152 and the other end movably connected to the housing body 14. By setting the latching body 152 and the housing body 14 apart, a certain amount of movement space can be effectively ensured between them, thereby enabling relative movement between the latching body 152 and the housing. This ensures that the latching protrusion 151 on the latching body 152 can more smoothly lock or unlock with the corresponding position of the battery pack's connector. In other words, in this application, the operator can operate the latch body 152 to lock or unlock the latch part 15 corresponding to the battery pack port. By providing the connecting arm 153, the connection between the latch part 15 and the housing body 14 can be ensured and the latch part 15 and the housing body 14 can be prevented from disengaging.

[0020] In some implementations, the snap-fit ​​protrusion 151 extends along the thickness direction of the snap-fit ​​body 152 and toward the connection opening 12. This arrangement ensures that the snap-fit ​​protrusion 151 can more easily lock or unlock with the corresponding position of the battery pack's connector. Furthermore, in this application, the extension direction of the snap-fit ​​protrusion 151 can be perpendicular to the extension direction of the snap-fit ​​body 152. Preferably, the snap-fit ​​body 152 is positioned on the top surface of the housing body 14, while the snap-fit ​​protrusion 151 extends toward the bottom surface of the housing body 14. Of course, the positional relationship between the snap-fit ​​body 152 and the housing body 14 can be adaptively adjusted according to actual usage.

[0021] In some implementations, the connecting arm 153 includes a first connecting segment 1531 and a second connecting segment 1532 connected sequentially and angled together. The end of the first connecting segment 1531 away from the second connecting segment 1532 is connected to the snap-fit ​​body 152, and the end of the second connecting segment 1532 away from the first connecting segment 1531 is movably connected to the housing body 14. That is, in this application, the two connecting arms 153, the two first connecting segments 1531, and the snap-fit ​​body 152 form a cross shape, and the two second connecting segments 1532 can extend on the same side of the snap-fit ​​protrusion 151 towards the housing body 14, or in other words, the extension direction of the second connecting segments 1532 is the same as the extension direction of the snap-fit ​​protrusion 151. Therefore, in this application, the connecting arm 153 can support the snap-fit ​​body 152 through the second connecting segments 1532, preventing the snap-fit ​​body 152 from contacting the housing body 14.

[0022] Specifically, the housing body 14 is provided with different connecting shafts 141 corresponding to different connecting arms 153. The connecting arms 153 are sleeved on the connecting shafts 141 and can rotate relative to the connecting shafts 141. This arrangement ensures that while the connecting arms 153 are connected to the housing body 14 through the second connecting section 1532, they can also drive the latching body 152 to rotate relative to the housing body 14. This ensures that the latching body 152 can lock and unlock with the corresponding position of the battery pack port through the latching protrusion 151.

[0023] In some implementations, the housing assembly 10 also includes a reset member 16, with its two ends abutting against the housing body 14 and the latching body 152, respectively. Furthermore, in this application, the reset member 16 can be a spring. By providing a spring, a force can be applied to the latching body 152, thereby keeping the latching protrusion 151 on the latching body 152 locked to the battery pack connector. When it is necessary to unlock the latching protrusion 151 from the battery pack connector, the operator can press one end of the latching body 152 away from the latching protrusion 151, causing the latching protrusion 151 to tilt away from the battery pack connector, thereby unlocking the latching protrusion 151 from the battery pack connector, and at this time, the connector can be removed from the battery pack connector. Therefore, in this application, the latching body 152, the connecting arm 153, the connecting shaft 141 of the housing body 14, and the spring can form a lever-like structure, thereby enabling the locking and unlocking of the connector and the battery pack connector in this application. Therefore, when operating the connector in this application, the operator needs to press the latch body 152. Of course, in this application, other structures such as limit pins can be used to replace the reset member 16 to limit the latch body 152, thereby ensuring that the connector and the battery pack socket can switch between locked and unlocked states.

[0024] In some implementations, the spring specifications are as follows: spring wire diameter d = 0.6 mm, spring outer diameter D = 5.6 mm, spring inner diameter D1 = 4.4 mm, free length H0 = 14.2 mm, and total number of coils n1 = 7. Of course, in this application, other spring specifications can be selected depending on the actual design requirements.

[0025] In some implementations, the housing body 14 and the snap-fit ​​body 152 are respectively provided with mounting grooves 161 corresponding to the reset member 16. That is, in this application, the two ends of the spring can be respectively accommodated in the mounting grooves 161 of the housing body 14 and the snap-fit ​​body 152, thereby effectively ensuring the stability of the connection between the spring and the housing body 14 and the snap-fit ​​body 152, thus preventing the spring from falling off and ensuring the performance of the connector. Of course, in this application, the two ends of the spring can also be fixed to the housing body 14 and the snap-fit ​​body 152 by means of adhesive dispensing.

[0026] In some implementations, the housing body 14 has at least two spaced-apart limiting protrusions 142 on the side facing the latching body 152, with at least a portion of the latching body 152 positioned between the two limiting protrusions 142. This arrangement ensures that when the latching body 152 is pressed, the two limiting protrusions 142 limit its movement, preventing deviation and allowing it to move in a predetermined direction and accurately engage with the battery pack's connector. Therefore, this design effectively guarantees the connector's performance.

[0027] In some implementations, the cross-sectional area of ​​the receiving cavity 11 near the mounting opening 13 is larger than the cross-sectional area of ​​the receiving cavity 11 near the connecting opening 12, and the circumferential inner sidewall of the receiving cavity 11 has at least one stepped surface 111. The PIN assembly 20 is correspondingly provided with at least one stepped structure 21 that abuts against the stepped surface 111. Furthermore, in this application, bolt holes can be provided in the stepped structure 21 of the PIN assembly 20 and the stepped surface 111 in the receiving cavity 11, thereby enabling the PIN assembly 20 to be detachably connected inside the receiving cavity 11 by bolts. In addition, in this application, the mutual cooperation of the stepped surface 111 and the stepped structure 21 can also ensure that the PIN assembly 20 is installed in place and can also limit the PIN assembly 20. At the same time, by providing multiple stepped surfaces 111 in the receiving cavity 11, it can also ensure that the receiving cavity 11 can be adapted to PIN assemblies 20 of different models or sizes, thereby improving the compatibility performance of the receiving cavity 11. In some implementations of this application, the receiving cavity 11 is formed by three rectangular cavities of different sizes, and the three rectangular cavities are connected sequentially from largest to smallest, thereby ensuring that a stepped surface 111 can be formed between two adjacent rectangular cavities. Furthermore, the circumferential inner sidewalls of the rectangular cavities have rounded chamfers. Specifically, the external dimensions of the shell body 14 are 45mm × 39mm × 39mm (length, width, height), and the internal structure is a stepped rectangular cavity structure with four rounded corners, i.e., a three-cavity structure. The large rounded corner rectangular cavity has dimensions of 50.16mm × 9.1mm × 45.5mm (length, width, height) and a chamfer radius (R) of 3.08mm; the medium rounded corner rectangular cavity has dimensions of 38mm × 10.4mm × 10mm (length, width, height) and a chamfer radius (R) of 3.08mm; and the small rounded corner rectangular cavity has dimensions of 36.6mm × 8.6mm × 8mm (length, width, height) and a chamfer radius (R) of 3.08mm.

[0028] Specifically, the PIN assembly 20 includes a PIN retaining housing 22 and at least one spring PIN 23. The PIN retaining housing 22 is detachably connected to the housing assembly 10. At least a portion of the PIN retaining housing 22 is disposed within the receiving cavity 11, and at least another portion of the PIN retaining housing 22 extends out of the connection opening 12. The PIN retaining housing 22 is provided with at least one PIN pin hole 221 corresponding to the spring PIN 23. The PIN pin hole 221 includes a small-diameter section 2211 and a large-diameter section 2212 connected in sequence. At least the portion of the PIN retaining housing 22 corresponding to the end of the large-diameter section 2212 away from the small-diameter section 2211 extends out of the connection opening 12, and one end of the spring PIN 23 extends into the PIN pin hole 221 from the end of the small-diameter section 2211 away from the large-diameter section 2212. In this application, when connected to the battery pack connector, the spring PIN 23, under the thrust of its own spring, presses against the top of the battery pack's PIN pins, forming good contact and preventing wear on the battery pack's PIN pins.

[0029] In some implementations of this application, the PIN pin fixing shell 22 can be a PIN pin fixing plastic shell with dimensions of 50mm × 8.45mm × 31mm (length × width × height). It has two stepped bolt holes on each side, with a large bolt hole diameter of ∅6mm and a small bolt hole diameter of ∅3.5mm, for detachable connection to the stepped surface 111 of the receiving cavity 11. The fixing plastic shell has eight stepped through holes for fixing the spring PIN pin 23. The large diameter of the pin hole (i.e., the diameter of the large diameter section 2212) is ∅1.25mm, and the small diameter of the pin hole (i.e., the diameter of the small diameter section 2211) is ∅1.2mm.

[0030] Preferably, the outer surface of the PIN pin retaining housing 22 has at least one anti-misalignment groove 222, and the extending direction of the anti-misalignment groove 222 is parallel to the axial direction of the PIN pin hole 221. In this application, by providing the anti-misalignment groove 222, it can be ensured that when the connector is connected to the battery pack socket, it can only be assembled in a preset direction, thereby ensuring the performance of the connector and preventing incorrect connection between the connector and the battery pack socket.

[0031] In some implementations, the terminal fixing assembly 30 abuts against the PIN pin fixing shell 22. The terminal fixing assembly 30 has different mounting cavities 31 corresponding to different terminals of the wire harness assembly 40. The different mounting cavities 31 correspond to different PIN pin holes 221. The side of the terminal fixing assembly 30 near the PIN pin fixing shell 22 has an opening 32 that communicates with the mounting cavity 31 corresponding to the PIN pin hole 221. In some implementations of this application, the terminal fixing assembly is a terminal fixing shell with dimensions of 31mm × 16mm × 7.5mm (length × width × height). It has eight rectangular cavities inside, namely mounting cavities 31, with dimensions of 4.9mm × 3mm × 14.6mm, used to install and fix the terminals of the wire harness assembly 40. Eight square openings 32 with dimensions of 1.8mm × 1.8mm are opened on the bottom surface of the eight rectangular cavities.

[0032] In some implementations, the connector also includes a retaining cover 50, which covers the side of the terminal retaining assembly 30 away from the PIN pin assembly 20 and is detachably connected to the side of the housing assembly 10 with the mounting opening 13, thereby limiting the position of the terminal retaining assembly 30, and the retaining cover 50 is provided with a clearance through hole 51 for the wire harness assembly 40 to pass through.

[0033] In some implementations, the connector also includes a wire harness fastening plate 60, which is disposed on the side of the fixed cover plate 50 away from the housing assembly 10. The wire harness fastening plate 60 includes an upper end plate 61 and a lower end plate 62 that are spliced ​​together. The lower end plate 62 is detachably connected to the fixed cover plate 50 and the upper end plate 61, respectively. The sides of the upper end plate 61 and the lower end plate 62 that are spliced ​​together form a plurality of wire pressing holes 63, through which different wires of the wire harness assembly 40 pass.

[0034] In some implementations of this application, the fixing cover 50 can be a plastic shell fixing plate with dimensions of 65mm × 25mm × 11.2mm (length × width × height). The plastic shell fixing plate has four stepped bolt holes at its four corners, with the large bolt hole diameter being ∅ 6mm and the small bolt hole diameter being ∅ 3.2mm, used for locking with the shell body 14. There are three M2.5 threaded holes in the middle position for connecting with the wire harness fastening plate 60, and the through hole 51 is 32.5mm long and 2.5mm wide, to ensure that the wire harness assembly 40 can spread out the wire harness without tangling, that is, to spread out the wires of the wire harness assembly 40.

[0035] Meanwhile, the wire clamping hole 63 formed by the combination of the upper end plate 61 and the lower end plate of the wire harness fastening plate 60 has a diameter of ∅1.3mm. The wire clamping hole 63 has an interference fit of 0.1mm with the wire body of the wire harness assembly 40. The upper end plate 61 has two M2.5 threaded holes, and the lower end plate 62 has two stepped bolt holes. The upper end plate 61 and the lower end plate 62 are fastened and fixed to the wire harness by bolts. When the wire harness assembly 40 is subjected to external tension, it can prevent the terminals at the ends of the wire body of the wire harness assembly 40 inside the receiving cavity 11 from being subjected to force. The large diameter of the stepped bolt hole is ∅6mm, the small diameter of the stepped bolt hole is ∅3.2mm, and there are three stepped bolt holes in the middle of the wire harness fastening end plate. The large diameter of the stepped bolt hole is ∅6mm. The diameter of the stepped bolt hole is ∅3.2mm, which corresponds to the three M2.5 threaded holes in the middle of the fixed cover plate 50. The wire harness fastening plate 60 is fastened to the fixed cover plate 50 by bolts.

Claims

1. A connector, comprising: The housing assembly (10) has a receiving cavity (11), and the two ends of the housing assembly (10) are respectively provided with a connection opening (12) and a mounting opening (13) communicating with the receiving cavity (11). A PIN assembly (20), at least a portion of which is detachably disposed within the receiving cavity (11); Terminal fixing assembly (30), at least a portion of which covers the mounting opening (13); A wire harness assembly (40), one end of which extends into the terminal fixing assembly (30) and is connected to the PIN pin assembly (20) through the terminal fixing assembly (30).

2. The connector according to claim 1, wherein the housing assembly (10) comprises: The housing body (14) has the receiving cavity (11), the connection opening (12) and the mounting opening (13). The snap-fit ​​part (15) is disposed on the outer surface of the housing body (14) and is movably connected to the housing body (14), and the snap-fit ​​part (15) has a snap-fit ​​protrusion (151) at one end near the connection opening (12).

3. The connector according to claim 2, wherein the snap-fit ​​portion (15) comprises: The buckle body (152) is spaced apart from the housing body (14). The two ends of the buckle body (152) are respectively provided corresponding to the connection opening (12) and the mounting opening (13). The buckle body (152) has the snap-fit ​​protrusion (151) at the end near the connection opening (12). At least two connecting arms (153) are provided on both sides of the length direction of the buckle body (152), and one end of the connecting arm (153) is connected to the buckle body (152), and the other end of the connecting arm (153) is movably connected to the housing body (14).

4. The connector of claim 3, wherein, The housing body (14) is provided with different connecting shafts (141) corresponding to different connecting arms (153). The connecting arm (153) is sleeved on the connecting shaft (141) and can rotate relative to the connecting shaft (141).

5. The connector according to claim 3, wherein the housing assembly (10) further comprises a reset member (16), the two ends of the reset member (16) abutting against the housing body (14) and the snap-fit ​​body (152) respectively.

6. The connector of claim 5, wherein, The housing body (14) and the buckle body (152) are respectively provided with mounting grooves (161) corresponding to the reset member (16).

7. The connector of claim 3, wherein, The housing body (14) has at least two spaced limiting protrusions (142) on the side facing the buckle body (152), and at least a portion of the buckle body (152) is disposed between the two limiting protrusions (142).

8. The connector according to claim 3, wherein the connecting arm (153) comprises a first connecting segment (1531) and a second connecting segment (1532) connected sequentially and arranged at an angle, wherein the end of the first connecting segment (1531) away from the second connecting segment (1532) is connected to the snap-fit ​​body (152), and the end of the second connecting segment (1532) away from the first connecting segment (1531) is movably connected to the housing body (14).

9. The connector of claim 3, wherein, The snap-fit ​​protrusion (151) extends along the thickness direction of the snap-fit ​​body (152) and toward the connection opening (12).

10. The connector according to any one of claims 1 to 9, wherein the cross-sectional area of ​​the receiving cavity (11) near the mounting opening (13) is greater than the cross-sectional area of ​​the receiving cavity (11) near the connection opening (12), and the circumferential inner wall of the receiving cavity (11) has at least one stepped surface (111), and the PIN pin assembly (20) is provided with at least one stepped structure (21) that abuts against the stepped surface (111).

11. The connector according to any one of claims 1 to 9, wherein the PIN pin assembly (20) comprises: A PIN pin retaining shell (22) is detachably connected to the housing assembly (10), at least a portion of the PIN pin retaining shell (22) is disposed within the receiving cavity (11), and at least another portion of the PIN pin retaining shell (22) extends out of the connection opening (12). At least one spring PIN pin (23), and the PIN pin retaining housing (22) is provided with at least one PIN pin hole (221) corresponding to the spring PIN pin (23). The PIN pin hole (221) includes a small diameter segment (2211) and a large diameter segment (2212) connected in sequence. At least the portion of the large diameter segment (2212) away from the small diameter segment (2211) extends out of the connection opening (12), and one end of the spring PIN pin (23) extends into the PIN pin hole (221) from the end of the small diameter segment (2211) away from the large diameter segment (2212).

12. The connector of claim 11, wherein, The outer surface of the PIN pin retaining shell (22) has at least one anti-fooling groove (222), and the extension direction of the anti-fooling groove (222) is parallel to the axial direction of the PIN pin hole (221).

13. The connector of claim 11, wherein, The terminal fixing assembly (30) abuts against the PIN pin fixing shell (22). The terminal fixing assembly (30) is provided with different mounting cavities (31) corresponding to different terminals of the wire harness assembly (40). The different mounting cavities (31) correspond to different PIN pin holes (221). The side of the terminal fixing assembly (30) near the PIN pin fixing shell (22) is provided with an opening (32) that communicates with the mounting cavity (31) corresponding to the PIN pin hole (221).

14. The connector according to any one of claims 1 to 9, the connector further comprising a fixing cover (50) covering the side of the terminal fixing assembly (30) away from the PIN pin assembly (20) and detachably connected to the side of the housing assembly (10) having the mounting opening (13), and the fixing cover (50) being provided with a clearance through hole (51) through which the wire harness assembly (40) passes.

15. The connector according to claim 14, the connector further comprising a wire harness fastening plate (60), the wire harness fastening plate (60) being disposed on the side of the fixed cover plate (50) away from the housing assembly (10), the wire harness fastening plate (60) comprising an upper end plate (61) and a lower end plate (62) spliced ​​together, the lower end plate (62) being detachably connected to the fixed cover plate (50) and the upper end plate (61) respectively, and the side of the upper end plate (61) and the lower end plate (62) spliced ​​together forming a plurality of wire pressing holes (63), the different wires of the wire harness assembly (40) passing through different wire pressing holes (63).

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