Abutment

Abstract

The embodiment of the utility model discloses an abutment. The base station comprises a shell and a connecting seat, the connecting seat is arranged on the shell, the connecting seat comprises a needle threading part, a needle hole allowing a needle tail of a cantilever needle to penetrate through is formed in the needle threading part, the needle hole is communicated with the interior of the shell and the outside, and a clamping groove used for fixing a needle body of the cantilever needle is further formed in the needle threading part. A set angle is formed between the extending direction of the clamping groove and the extending direction of the needle hole corresponding to the clamping groove. According to the embodiment of the invention, the cantilever needle can be stably fixed by using two supporting positions of the clamping groove and the needle hole, so that the position of the suspended needle head can be further ensured to be fixed, the phenomenon that the needle head deviates in the test working process is reduced, and the stability and the reliability of the whole base station in the test working process are ensured.

Description

Technical Field

[0001] This application relates to the technical field of cantilever needle bases, and in particular to a base. Background Art

[0002] Currently, when using a cantilever needle base to test a wafer, when the existing base fixes the cantilever needle, there are often problems such as cumbersome processes and poor fixing effects, resulting in situations such as position deviation and angle deviation of the cantilever needle during the test work; further affecting the efficiency and accuracy of the wafer test work. Summary of the Utility Model

[0003] This application aims to solve at least one of the technical problems existing in the prior art. For this reason, this application proposes a base to solve the problem of poor fixing effect of the existing base on the cantilever needle.

[0004] This application provides a base, including: a housing and a connection seat;

[0005] The connection seat is arranged on the housing. The connection seat includes a needle-passing part. A needle hole for the needle tail of the cantilever needle to pass through is formed on the needle-passing part. The needle hole communicates the inside of the housing with the outside. A clamping groove for fixing the needle body of the cantilever needle is further arranged on the needle-passing part. The extending direction of the clamping groove and the extending direction of the corresponding needle hole form a set angle;

[0006] At least one side wall of the housing is provided with a wire-passing port. The needle tail extends into the inside of the housing through the needle hole, and the needle tail located inside the housing extends out through the wire-passing port through a connecting wire.

[0007] Based on the above base, through the setting of the needle-passing part on the connection seat, an installation space can be provided for the cantilever needle. In addition to the function of allowing the needle tail to extend from the outside into the inside of the housing, the needle hole on the needle-passing part can also position and fix the needle tail, providing support for the periphery of the needle tail. The clamping groove on the needle-passing part can clamp and fix the needle body between the needle tail and the needle head of the cantilever needle. By setting the extending directions of the needle hole and the clamping groove to form a set angle, an included angle is formed between the needle tail fixed in the needle hole and the needle body fixed in the clamping groove, so that a stable fixing effect can be formed on the cantilever needle by the two supporting positions of the clamping groove and the needle hole, thereby further ensuring the fixed position of the suspended needle head, reducing the occurrence of needle head deviation during the test work, and ensuring the stability and reliability of the entire base during the test work.

[0008] In an embodiment of the above base, the needle-passing part includes a plurality of needle holes arranged in an arc, and the needle head of the cantilever needle is located on the concave side of the arc,

[0009] and / or,

[0010] The needle-passing part includes the needle hole extending along an arc with a set radian. The needle tails of a plurality of the cantilever needles pass through the needle hole, and the needle tips of the cantilever needles are located on the concave side of the arc.

[0011] In one embodiment of the above-mentioned base, the connecting seat includes at least two of the needle-passing parts arranged uniformly along its circumferential direction.

[0012] In one embodiment of the above-mentioned base, a first groove structure is provided on the end face of the needle hole facing the corresponding card slot. The bottom surface of the first groove structure is flush with the bottom surface of the card slot and is communicated with the card slot.

[0013] In one embodiment of the above-mentioned base, the needle-passing part includes a plurality of the first groove structures arranged along an arc and a plurality of the card slots arranged along an arc. The first groove structures and the card slots are arranged in one-to-one correspondence.

[0014] and / or,

[0015] The needle-passing part includes the first groove structure extending along an arc with a set radian, and the first groove structure is communicated with a plurality of the card slots.

[0016] In one embodiment of the above-mentioned base, a second groove structure is provided on the end face of the needle hole facing away from the corresponding card slot. The second groove structure is used to avoid part of the needle tails of the cantilever needles, and / or, the second groove structure is used to accommodate at least part of the connecting wire.

[0017] In one embodiment of the above-mentioned base, a first pressing groove is formed on the inner side wall of the housing. The first pressing groove sleeves the outside of the connecting seat, and a first pressing block is arranged in the first pressing groove. The first pressing block is used to squeeze and fix the needle tails of the cantilever needles, and / or, the first pressing block is used to squeeze and fix the connecting wire.

[0018] In one embodiment of the above-mentioned base, a second pressing groove is formed on the inner side wall of the housing. The second pressing groove is located between the wire passing opening and the connecting seat, and a second pressing block is arranged in the second pressing groove. The second pressing block is used to squeeze and fix the needle tails of the cantilever needles, and / or, the second pressing block is used to squeeze and fix the connecting wire.

[0019] In one embodiment of the above-mentioned base, the number of the wire passing openings is at least two;

[0020] The number of the second pressing grooves is the same as the number of the wire passing openings and is arranged in one-to-one correspondence with the wire passing openings.

[0021] and / or,

[0022] The second pressing groove extends a set length along the arrangement direction of the wire passing opening, and at least a part of the second pressing groove is located between the connecting seat and any one of the wire passing openings.

[0023] In an embodiment of the above-mentioned base, the base further includes a cover plate, the cover plate is buckled on the housing, the cover plate is disposed opposite to the connecting seat, and a protection cavity is formed between the cover plate and the housing, and the protection cavity is used to accommodate the connecting seat to protect the cantilever needle on the connecting seat.

[0024] One or more of the above embodiments of the present application have at least one or more of the following beneficial effects:

[0025] The arrangement of the needle passing part on the connecting seat can provide an installation space for the cantilever needle. In addition to the needle hole on the needle passing part being able to serve as a place for the needle tail to extend from the outside into the interior of the housing, it can also position and fix the needle tail and support the periphery of the needle tail. The card slot on the needle passing part can clamp and fix the needle body between the needle tail and the needle head of the cantilever needle. By setting the extension directions of the needle hole and the card slot to form a set angle, an included angle is formed between the needle tail fixed in the needle hole and the needle body fixed in the card slot, so that a stable fixing effect on the cantilever needle can be formed by the two supporting positions of the card slot and the needle hole, thereby further ensuring the fixed position of the suspended needle head and reducing the occurrence of the needle head offset during the test work, and ensuring the stability and reliability of the entire base during the test work.

[0026] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Description of the Drawings

[0027] Referring to the drawings, the disclosure of the present application will become more understandable. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the protection scope of the present application. In addition, similar numbers in the drawings are used to represent similar components, where:

[0028] Figure 1 is a schematic structural diagram of the base according to an embodiment of the present application;

[0029] Figure 2 is a schematic structural diagram of the base removing the cover plate according to an embodiment of the present application;

[0030] Figure 3 is Figure 2 a front view of

[0031] Figure 4 is a schematic structural diagram of the bottom of the base according to an embodiment of the present application;

[0032] Figure 5 Schematic structural diagram of the detachable plate removed from the bottom of the abutment according to the embodiment of the present application;

[0033] Figure 6 Schematic structural diagram of the cantilever needle installed on the connection base according to the embodiment of the present application;

[0034] Figure 7 Schematic structural diagram of the top of the connection base according to the embodiment of the present application;

[0035] Figure 8 Schematic structural diagram of the bottom of the connection base according to the embodiment of the present application;

[0036] Figure 9 Schematic structural diagram of the cover plate according to the embodiment of the present application.

[0037] Explanation of reference numerals

[0038] 1. Housing; 11. Wire passing port; 121. First pressing groove; 122. Second pressing groove; 131. First pressing block; 132. Second pressing block; 14. Detachable plate; 15. Positioning block; 2. Connection base; 21. Needle passing part; 211. Needle hole; 212. Card slot; 213. First groove structure; 214. Second groove structure; 3. Cantilever needle; 31. Needle tail; 32. Needle body; 33. Needle head; 4. Cover plate; 41. Protection cavity. Detailed implementation manners

[0039] Some embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present application and are not intended to limit the protection scope of the present application.

[0040] Currently, when using the cantilever needle abutment to test wafers, when the existing abutment fixes the cantilever needle, there are often problems such as cumbersome processes and poor fixing effects, resulting in situations such as position deviation and angle deviation of the cantilever needle during the test work; furthermore, it affects the efficiency and accuracy of the wafer test work.

[0041] Based on this, this embodiment provides a base station. By setting the needle-passing part on the connecting seat, an installation space can be provided for the cantilever needle. The needle hole on the needle-passing part can not only allow the needle tail to extend into the interior of the housing from the outside, but also position and fix the needle tail, providing support for the circumferential side of the needle tail. The card slot on the needle-passing part can clamp and fix the needle body between the needle tail and the needle head of the cantilever needle. By setting the extension directions of the needle hole and the card slot to form a set angle, an angle is formed between the needle tail fixed in the needle hole and the needle body fixed in the card slot. Thus, a stable fixing effect on the cantilever needle can be formed by using the two supporting positions of the card slot and the needle hole, further ensuring the fixed position of the suspended needle head, reducing the occurrence of needle head offset during the testing process, and ensuring the stability and reliability of the entire base station during the testing work.

[0042] The following will specifically elaborate on this application through specific embodiments.

[0043] Refer to Figures 1 to 9 As shown, this embodiment provides a base station, including: a housing 1 and a connecting seat 2; the connecting seat 2 is arranged on the housing 1, the connecting seat 2 includes a needle-passing part 21, a needle hole 211 for the needle tail 31 of the cantilever needle 3 to pass through is opened on the needle-passing part 21, the needle hole 211 communicates with the interior and the outside of the housing 1, and a card slot 212 for fixing the needle body 32 of the cantilever needle 3 is further provided on the needle-passing part 21. The extension direction of the card slot 212 and the extension direction of the corresponding needle hole 211 form a set angle, that is to say, the extension direction of the card slot 212 is not parallel to the extension direction of the needle hole 211; a wire passing port 11 is opened on at least one side wall of the housing 1, the needle tail 31 extends into the interior of the housing 1 through the needle hole 211, and the needle tail 31 located inside the housing 1 extends out through the wire passing port 11 through a connecting wire.

[0044] The base station provided in this embodiment can, through the setting of the needle-passing part 21 on the connecting seat 2, provide an installation space for the cantilever needle 3. The needle hole 211 on the needle-passing part 21 can not only allow the needle tail 31 to extend into the interior of the housing 1 from the outside, but also position and fix the needle tail 31, providing support for the circumferential side of the needle tail 31. The card slot 212 on the needle-passing part 21 can clamp and fix the needle body 32 between the needle tail 31 and the needle head 33 of the cantilever needle 3. By setting the extension directions of the needle hole 211 and the card slot 212 to form a set angle, an angle is formed between the needle tail 31 fixed in the needle hole 211 and the needle body 32 fixed in the card slot 212. Thus, a stable fixing effect on the cantilever needle 3 can be formed by using the two supporting positions of the card slot 212 and the needle hole 211, further ensuring the fixed position of the suspended needle head 33, reducing the occurrence of needle head 33 offset during the testing process, and ensuring the stability and reliability of the entire base station during the testing work.

[0045] In some embodiments, the extending direction of the card slot 212 is perpendicular to the extending direction of the pinhole 211. Specifically, the card slot 212 is formed on the surface of the connection base 2 opposite to the interior of the housing 1. It should be understood that the opening of the card slot 212 is provided on the side opposite to the interior of the housing 1. The pinhole 211 extends in a direction perpendicular to the side wall of the housing 1 where the connection base 2 is installed. The pin tail 31 and the pin body 32 of the cantilever pin 3 are perpendicular to each other. After the end of the pin tail 31 far from the needle tip 33 is inserted into the pinhole 211 along the direction perpendicular to the side wall of the housing 1 for installing the connection base 2, it continues to be inserted until the pin body 32 is snap-fitted and fixed with the corresponding card slot 212, completing the connection of one cantilever pin 3 to the base; continue to refer to Figures 2 to 5 As shown, when the pin tails 31 of all the cantilever pins 3 are in a divergent state before the pin tails 31 of the cantilever pins 3 are bent at an angle perpendicular to the pin bodies 32, and when the extending direction of the card slot 212 is perpendicular to the extending direction of the pinhole 211, it can be ensured that the action of inserting the pin tail 31 along the pinhole 211 will not affect the snap-fitting action of the pin body 32 with the card slot 212. The direction of inserting the pin tail 31 is the same as the moving direction of the pin body 32 being snap-fitted into the card slot 212, further ensuring the installation efficiency and installation effect of the cantilever pin 3 and reducing the adjustment work of the cantilever pin 3 after inserting the pin tail 31; the extending direction of the card slot 212 and the extending direction of the pinhole 211 can also form an obtuse angle, as long as the situation where the pin body 32 and the pin tail 31 cannot move in place can be avoided.

[0046] Furthermore, the pin tail 31 and the needle tip 33 of the cantilever pin 3 can be arranged in parallel and extend out from both sides of the pin body 32 respectively. That is to say, the pin body 32 can extend in the horizontal direction, and the needle tip 33 and the pin tail 31 at both ends of the pin body 32 extend in opposite directions respectively. The pin tail 31 extends towards the inside of the housing 1, and the needle tip 33 extends towards the side away from the housing 1 to facilitate abutting against the test point.

[0047] In some embodiments, the needle-passing portion 21 includes a plurality of needle holes 211 arranged in an arc. The needle tips 33 of the cantilever needles 3 are located on the concave side of the arc. It should be understood that the plurality of needle holes 211 are arranged on the outer surface of the connection base 2, and / or the needle-passing portion 21 includes needle holes 211 extending along the arc by a set radian. The needle tails 31 of the plurality of cantilever needles 3 pass through the needle holes 211, and the needle tips 33 of the cantilever needles 3 are located on the concave side of the arc. That is to say, the needle holes 211 can be in the shape of a sector ring. Through the plurality of needle holes 211 arranged in an arc and / or the needle holes 211 extending along the arc by a set radian, the needle tips 33 of the plurality of cantilever needles 3 located in the same needle-passing portion 21 can be made to approach each other. Since the diameter of the needle tip 33 is smaller than the diameter of the needle body 32, arranging the cantilever needles 3 in an arc can further arrange the needle tips 33 more densely. Moreover, such an arrangement can also make the lengths of the needle bodies 32 of each cantilever needle 3 match each other and be close to each other in length. Among them, a set gap needs to be provided between every two cantilever needles 3 to ensure insulation between them, or an insulating layer can be provided outside each cantilever needle 3, or insulating layers can be provided at intervals outside the plurality of cantilever needles 3.

[0048] Continue to refer to Figure 7 As shown, the connection base 2 includes at least two needle-passing portions 21 arranged uniformly along its circumference. Specifically, the connection base 2 includes two needle-passing portions 21 arranged opposite to each other. Each needle-passing portion 21 is provided with a plurality of needle holes 211 arranged in an arc. The plurality of needle holes 211 arranged in an arc in the two needle-passing portions 21 are symmetrically arranged on both sides of the central position of the connection base 2. The plurality of needle holes 211 in the two needle-passing portions 21 can be arranged in the same circle. That is to say, the plurality of needle holes 211 in the two needle-passing portions 21 can be arranged on a circular boundary with the central position of the connection base 2 as the center of the circle.

[0049] Furthermore, the connection base 2 can be a cylindrical or other columnar structure, and the connection base 2 can be detachably connected to the housing 1 through structures such as flanges.

[0050] In some embodiments, the end face of the needle hole 211 facing its corresponding card slot 212 is provided with a first groove structure 213. The bottom surface of the first groove structure 213 is flush with the bottom surface of the card slot 212 and is communicated with the card slot 212. Through the setting of the first groove structure 213, it is possible to avoid large stress concentration at the connection bending portion of the needle body 32 and the needle tail 31, make the connection between the needle body 32 and the needle tail 31 transition more smoothly, protect the self-structure of the cantilever needle 3, and reduce the damage rate of the cantilever needle 3. Among them, the first groove structure 213 and the card slot 212 can cooperate to form a glue injection groove. By injecting glue into the first groove structure 213 and / or the card slot 212, the connection and fixation of the cantilever needle 3 and the connection base 2 are realized. At the same time, the injected glue can be insulating glue, so that while fixing the cantilever needle 3, an insulating layer covering the cantilever needle 3 can be formed.

[0051] In a further embodiment, the needle-passing portion 21 includes a plurality of first groove structures 213 arranged in an arc and a plurality of card slots 212 arranged in an arc. The first groove structures 213 and the card slots 212 are arranged in one-to-one correspondence, and / or the needle-passing portion 21 includes a first groove structure 213 extending along an arc by a set radian, and the first groove structure 213 communicates with the plurality of card slots 212.

[0052] Continue to refer to Figure 6 and Figure 8 As shown, on the end face of the needle hole 211 facing away from the corresponding card slot 212, there is a second groove structure 214. The second groove structure 214 is used to avoid part of the needle tail 31 of the cantilever needle 3, and / or the second groove structure 214 is used to accommodate at least part of the connecting wire; further, the setting of the second groove structure 214 can shorten the length of the needle hole 211, reduce the difficulty of the needle tail 31 passing through the needle hole 211, and at the same time can also be used to accommodate the connecting wire. Among them, the connecting wire refers to the electrical connecting wire used to connect the external circuit and the needle tail 31. The connecting wire can be sleeved on the outside of the needle tail 31 to achieve electrical connection and cooperation with the needle tail 31; it should be understood that the second groove structure 214 can also be injected with glue, so that both end faces of the needle hole 211 are adhesively fixed to the needle tail 31 and / or the needle body 32 through injection of glue; among them, the second groove structure 214 can extend along the arrangement direction of the plurality of needle holes 211. For example, the second groove structure 214 can be set as an arc structure, and the second groove structure 214 can also be multiple, and the multiple second groove structures 214 are arranged in an arc.

[0053] Continue to refer to Figure 5 As shown, a first pressing groove 121 is formed on the inner side wall of the housing 1. The first pressing groove 121 is sleeved on the outside of the connecting seat 2, and a first pressing block 131 is arranged in the first pressing groove 121. The first pressing block 131 is used to squeeze and fix the needle tail 31 of the cantilever needle 3, and / or the first pressing block 131 is used to squeeze and fix the connecting wire; specifically, the first pressing groove 121 is an annular groove, and the first pressing block 131 is an annular block, and is opened on the inner side of the side wall of the housing 1 for installing the connecting seat 2 and / or on the inner side of the side wall of the housing 1 opposite to the connecting seat 2. The connecting wire or the needle tail 31 extending from the connecting seat 2 will extend towards the wire passing port 11. The first pressing block 131 in the annular first pressing groove 121 can squeeze and fix all the connecting wires and / or the needle tails 31. Further, two first pressing blocks 131 can be arranged opposite to each other to squeeze and fix the connecting wire and / or the needle tail 31, or the first pressing block 131 and the inner side wall of the opposite housing 1 can squeeze and fix the connecting wire and / or the needle tail 31.

[0054] Continue to refer to Figure 5As shown, in some embodiments, a second pressing groove 122 is formed on the inner sidewall of the housing 1. The second pressing groove 122 is located between the wire passing opening 11 and the connection base 2. A second pressing block 132 is provided in the second pressing groove 122. The second pressing block 132 is used to squeeze and fix the tail 31 of the cantilever needle 3, and / or the second pressing block 132 is used to squeeze and fix the connection wire. Through the arrangement of the second pressing groove 122, the connection wire can be fixed at a position close to the wire passing opening 11, thereby reducing excessive rubbing and friction between the connection wire and the wire passing opening 11 or other positions of the housing 1, and protecting the connection wire.

[0055] In some embodiments, the number of wire passing openings 11 is at least two; the number of second pressing grooves 122 is the same as that of the wire passing openings 11 and is arranged in one-to-one correspondence with the wire passing openings 11, and / or the second pressing grooves 122 extend a set length along the arrangement direction of the wire passing openings 11, and at least part of the second pressing grooves 122 are located between the connection base 2 and any one of the wire passing openings 11.

[0056] Furthermore, a positioning block 15 is provided in the first pressing groove 121 and / or the second pressing groove 122. The positioning block 15 is used for limiting cooperation with the first pressing block 131 and / or the second pressing block 132 to achieve axial or circumferential limitation of the first pressing block 131 and / or the second pressing block 132, avoiding actions such as rotation and displacement of the first pressing block 131 in the first pressing groove 121, and / or avoiding actions such as rotation and displacement of the second pressing block 132 in the second pressing groove 122, which may affect the effect of tightly fixing the connection wire and the cantilever needle 3.

[0057] Continue to refer to Figure 1 and Figure 9 As shown, in some embodiments, the base further includes a cover plate 4. The cover plate 4 is buckled on the housing 1. The cover plate 4 is disposed opposite to the connection base 2, and a protection cavity 41 is formed between the cover plate 4 and the housing 1. The protection cavity 41 is used to accommodate the connection base 2 to protect the cantilever needle 3 on the connection base 2. The cover plate 4 can be detachably connected to the housing 1 through structures such as bolts. Specifically, the cover plate 4 can be coaxially arranged with the connection base 2, and the connection between the cover plate 4 and the housing 1 is offset from the connection base 2, or the cover plate 4, the connection base 2, and the housing 1 can be connected together using the same connection structure.

[0058] In some embodiments, the sidewall of the housing 1 opposite to the connection base 2 is a detachable plate 14. The detachable plate 14 is detachably connected to the housing 1. After the detachable plate 14 is separated from the housing 1, the first pressing groove 121 and the second pressing groove 122 can be completely exposed, so as to facilitate the loading, unloading, and adjustment of the first pressing block 131 and the second pressing block 132. Through the arrangement of the detachable plate 14, after the connection wires are arranged on the first pressing block 131 and the second pressing block 132 in a set manner, the detachable plate 14 can be installed on the housing 1 to fix all the connection wires in the set manner.

[0059] Further, through holes are formed at the centers of the detachable plate 14 and the connecting seat 2, and the needle tip 33 of the cantilever needle 3 is disposed opposite to the position of the through hole for observation and alignment.

[0060] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0062] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A base, characterized in that: include: A housing (1) and a connecting seat (2); The connecting seat (2) is arranged on the shell (1), and the connecting seat (2) comprises a needle threading portion (21), and the needle threading portion (21) is provided with a needle hole (211) for the needle tail (31) of the cantilever needle (3) to pass through, and the needle hole (211) connects the inside of the shell (1) with the outside, and the needle threading portion (21) is also provided with a clamping groove (212) for fixing the needle body (32) of the cantilever needle (3), and the extension direction of the clamping groove (212) and the extension direction of the corresponding needle hole (211) form a set angle; At least one side wall of the shell (1) is provided with a wire passing opening (11), the needle tail (31) extends into the interior of the shell (1) through the needle hole (211), and the needle tail (31) located inside the shell (1) extends out from the wire passing opening (11) through a connecting line.

2. The base according to claim 1, characterized in that The needle insertion portion (21) comprises a plurality of needle holes (211) arranged along an arc, and the needle head (33) of the cantilever needle (3) is located on the concave side of the arc. and / or, The needle threading portion (21) comprises a needle hole (211) extending along an arc with a set arc, wherein the needle tails (31) of a plurality of the cantilever needles (3) are passed through the needle hole (211), and the needle heads (33) of the cantilever needles (3) are located on the concave side of the arc.

3. The base according to claim 1, characterized in that The connecting seat (2) comprises at least two needle-threading portions (21) evenly arranged along its circumference.

4. The base according to claim 1, characterized in that The pinhole (211) is provided with a first groove structure (213) on the end surface facing the corresponding card slot (212); the bottom surface of the first groove structure (213) is flush with the bottom surface of the card slot (212) and is in communication with the card slot (212).

5. The base according to claim 4, characterized in that The needle threading portion (21) comprises a plurality of the first groove structures (213) arranged along an arc and a plurality of the clamping slots (212) arranged along an arc, wherein the first groove structures (213) and the clamping slots (212) are arranged in a one-to-one correspondence. and / or, The needle-threading portion (21) comprises the first groove structure (213) extending along an arc with a set arc, and the first groove structure (213) is connected to the plurality of clamping slots (212).

6. The base according to claim 1, characterized in that: The end surface of the needle hole (211) facing away from the corresponding card slot (212) is provided with a second groove structure (214), and the second groove structure (214) is used to avoid a part of the needle tail (31) of the cantilever needle (3), and / or the second groove structure (214) is used to accommodate at least a part of the connecting wire.

7. The base according to claim 1, characterized in that A first pressing groove (121) is provided on the inner side wall of the shell (1), the first pressing groove (121) is sleeved on the outer side of the connecting seat (2), a first pressing block (131) is provided in the first pressing groove (121), the first pressing block (131) is used to press and fix the needle tail (31) of the cantilever needle (3), and / or the first pressing block (131) is used to press and fix the connecting line.

8. The base according to claim 1, characterized in that A second clamping groove (122) is provided on the inner side wall of the shell (1), and the second clamping groove (122) is located between the wire passing port (11) and the connecting seat (2). A second clamping block (132) is provided in the second clamping groove (122), and the second clamping block (132) is used to compress and fix the needle tail (31) of the cantilever needle (3), and / or the second clamping block (132) is used to compress and fix the connecting wire.

9. The base according to claim 8, characterized in that The number of the wire passing openings (11) is at least two; The number of the second pressing grooves (122) is the same as the number of the wire passing openings (11), and they are arranged in a one-to-one correspondence with the wire passing openings (11). and / or, The second pressing groove (122) extends to a set length along the arrangement direction of the wire passing openings (11), and at least a portion of the second pressing groove (122) is located between the connecting seat (2) and any of the wire passing openings (11).

10. The base according to any one of claims 1 to 9, characterized in that: The base also includes a cover plate (4), which is buckled onto the shell (1), and the cover plate (4) is arranged opposite to the connecting seat (2), and a protective cavity (41) is formed between the cover plate (4) and the shell (1), and the protective cavity (41) is used to accommodate the connecting seat (2) so as to protect the cantilever needle (3) on the connecting seat (2).

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