Crimping type printed circuit board connector

Abstract

The utility model relates to the technical field of electric connectors, in particular to a crimping type printed circuit board connector, which comprises a mounting plate and a plurality of groups of power supply terminals, and each group of power supply terminals is provided with an L-shaped inner side contact piece and an L-shaped outer side contact piece which are relatively independent; an outer contact piece slot and an inner contact piece slot which are used for installing each group of power supply terminals in a penetrating mode are arranged in the installation plate. The structural size of the outer contact piece slot and the inner contact piece slot allows the corresponding contact piece of the corresponding power supply terminal to penetrate out from back to front; the outer side contact pieces are limited when penetrating in the corresponding outer contact piece slots in place; and the inner side contact pieces are limited when penetrating in the corresponding inner contact piece slots in place. The die has the technical characteristics of easiness in manufacturing and high forming quality.

Description

Technical Field

[0001] This utility model relates to the field of electrical connector technology, specifically a crimp-type printed circuit board connector. Background Technology

[0002] Printed circuit boards (PCBs) are important electronic components, serving as the support for electronic devices. They need to connect with electrical connectors to meet the technical requirements for electrical connections between electronic components. Therefore, the connection structure between the electrical connectors and the PCB directly affects the performance of the finished PCB product.

[0003] There are two types of connection structures between electrical connectors and printed circuit boards (PCBs): soldered termination and crimped termination. Crimped termination involves applying pressure to the electrical connector to insert the power terminal lead (the crimped portion) into the corresponding plated hole on the PCB, achieving a tight connection; this is a solderless termination. To accommodate the arrangement of electrical connectors on the PCB and for crimping termination, the power terminal of the electrical connector is L-shaped bent between the connector's mounting plate and the PCB. The power terminal lead is a flexible, deformable structure—a fisheye structure. Thus, during crimping assembly on the PCB, pressure is applied to the top of the connector's mounting plate, causing the power terminal lead to flexibly collapse and insert into the corresponding plated hole on the PCB. However, this flexible collapse still retains sufficient spring force to maintain an airtight connection with the PCB's plated hole. It is obvious that the crimp termination method of electrical connectors on printed circuit boards eliminates the need for soldering; electrical connection can be achieved simply by insertion. This not only improves the assembly efficiency between electrical connectors and printed circuit boards and reduces assembly costs, but also eliminates the negative effects of soldering, including effectively protecting heat-sensitive components from potential damage and greatly reducing thermal stress on electrical connectors.

[0004] Based on the aforementioned assembly structure between the crimp-type printed circuit board connector and the printed circuit board, the inner and outer contact pieces that make up each power terminal of the electrical connector, when inserted into the corresponding inner and outer contact slots on the mounting plate, need to form an abutment fit with the top-side opposing structure constituting the corresponding contact slot (the top-side opposing structure of the inner contact slot is the layered plate between the inner and outer contact slots, and the top-side opposing structure of the outer contact slot is the upper wall plate of the mounting plate—i.e., the top plate) to ensure that the contact pieces do not deform during the transmission of crimping force. This requires that the structural dimensions of the corresponding contact slots on the mounting plate match the base contours of the inner and outer contact pieces, allowing only a slight gap between the inner and outer contact pieces within the corresponding contact slots. Furthermore, because the front part of the inner contact piece has an upwardly curved contact finger structure, and the front part of the outer contact piece has a downwardly curved contact finger structure, the inner and outer contact pieces are not flat thin plate structures, but rather three-dimensional structures with a certain spatial structural dimension at the front. Therefore, when the inner and outer contact pieces constituting the power terminal are inserted into the corresponding contact slots on the mounting plate, they must be inserted from front to back and then bent into shape, that is:

[0005] Before wearing the garment, the inner and outer contact plates, except for the three-dimensional structure at the front, are all straight plates.

[0006] When inserting, use the crimping part of the inner and outer contact pieces as the insertion front end, and insert it from front to back through the corresponding contact piece slot in the mounting plate;

[0007] After being fitted, the crimping portions of the inner and outer contact pieces extend straight on the rear side of the mounting plate. To accommodate the connection with the printed circuit board, the inner and outer contact pieces need to be bent in an L-shape, so that the finger portions of the bent inner and outer contact pieces move forward in the mounting plate and the crimping portions move downward on the rear side of the mounting plate.

[0008] Such technologies are exemplified by the Chinese patent document entitled "Electrical Connector and Method for Manufacturing Electrical Connector", with publication number CN 102832472 A and publication date of December 19, 2012.

[0009] However, the technical problem with this type of technology is:

[0010] 1. High-tech specialized equipment is required to perform L-shaped bending and shaping of the inner and outer contact pieces on the back of the mounting plate. The high purchase cost of specialized equipment increases the manufacturing cost of electrical connectors.

[0011] 2. Even if specialized equipment is used to bend and shape the inner and outer contact pieces on the back of the mounting plate, the bending of the inner and outer contact pieces must be guided by the structure of the mounting plate (i.e., the lower wall panel - the base plate, and the contact piece slot layered panels - the partitions). This places high technical requirements on the design and manufacturing precision of the mounting plate and increases the technical difficulty.

[0012] 3. Since the inner and outer contact pieces are spring-like structures with a certain degree of elasticity, it is difficult for the inner and outer contact pieces to achieve the bending accuracy required by the design when bent on the back side of the mounting plate, which is not conducive to the quality assurance of the finished electrical connector. Utility Model Content

[0013] The technical objective of this utility model is to provide a press-fit printed circuit board connector that is easy to manufacture and has high molding quality, addressing the unique assembly structure between the press-fit printed circuit board connector and the printed circuit board, as well as the shortcomings of the existing technology.

[0014] The technical objective of this utility model is achieved through the following technical solution: a crimp-type printed circuit board connector, comprising a mounting plate and multiple sets of power terminals;

[0015] Each set of power terminals has relatively independent inner and outer contact pieces;

[0016] The mounting plate has contact slots arranged inside for mounting each group of power terminals. The same group of contact slots is divided into upper and lower independent outer contact slots and inner contact slots by a shelf.

[0017] The structural dimensions of the external contact slot allow the outer contact piece of the corresponding power terminal to extend from back to front;

[0018] The structural dimensions of the inner contact slot allow the inner contact piece of the corresponding power terminal to extend from back to front;

[0019] The outer contact piece of the power terminal has an L-shaped bent structure before being inserted. The outer contact piece is limited after being inserted into the corresponding outer contact piece slot.

[0020] The inner contact piece of the power terminal has an L-shaped bent structure before being inserted. The inner contact piece is limited after being inserted into the corresponding inner contact piece slot.

[0021] Furthermore, when the outer contact piece is inserted into the corresponding outer contact piece slot, the top side of the outer contact piece abuts against the upper wall plate at the corresponding outer contact piece slot.

[0022] Furthermore, when the inner contact piece is inserted into the corresponding inner contact piece slot, a gap fit is formed between the top side of the inner contact piece and the layer plate at the inner contact piece slot.

[0023] Furthermore, a retaining strip is installed in the mating space between the top side of the inner contact piece and the corresponding layer plate to abut against the inner contact piece.

[0024] The aforementioned technical measures address the unique assembly structure between the crimp-type printed circuit board connector and the printed circuit board. The contact slots within the mounting plate are enlarged to allow the front contact fingers of the corresponding contact pieces to protrude, enabling the corresponding contact pieces to be inserted from back to front within the assembly structure of the mounting plate. This assembly method allows the contact pieces to be pre-formed into a precise L-shaped bend structure that meets design requirements, eliminating the need for further L-shaped bending after assembly on the mounting plate. Furthermore, based on the force characteristics of the inner and outer contact pieces during crimping, the outer contact piece is abutted by the upper wall plate of the mounting plate, eliminating the need to fill any excess space in the outer contact slot. Conversely, the excess space in the inner contact slot is filled by the retaining clip of the insertion assembly, which abuts against the inner contact slot's shelf, thus abutting the inner contact piece. This effectively satisfies the force requirements of the inner and outer contact pieces during crimping.

[0025] Therefore, the above-mentioned technical measures not only meet the force requirements of crimping electrical connectors, but also pre-bend the contact pieces to be assembled in the mounting plate according to the design requirements, eliminating the need for post-assembly bending. This eliminates the need for specialized equipment with specific technical requirements and high purchase costs, which helps control the manufacturing cost of electrical connectors. Furthermore, the pre-bent contact pieces do not need to rely on the structure of the mounting plate for guiding bending, which reduces the technical requirements for the design and manufacturing precision of the mounting plate and makes it easier to manufacture. The pre-bent contact pieces do not exhibit elastic recovery deformation after assembly, resulting in high stability after assembly and ultimately high quality electrical connectors.

[0026] As one preferred technical solution, the retaining strip is inserted into the mating space between the top side of the inner contact piece and the corresponding layer at the bent portion of the inner contact piece, and the rear edge of the retaining strip extends out from the rear side of the bent portion of the inner contact piece. This technical measure addresses the stress characteristics of the inner contact piece during crimping, providing a reliable abutment limit at the bent portion of the bent inner contact piece, ensuring that the pressure of the inner contact piece is clearly transmitted to the retaining strip during crimping, and preventing deformation of the inner contact piece under stress.

[0027] As one of the preferred technical solutions, the rear edge of the card strip is located on the front side of the corresponding outer contact piece and is matched with the spacing of the corresponding outer contact piece;

[0028] The bent portion of the outer contact piece is located on the front side of the rear edge of the upper wall panel of the mounting plate.

[0029] The above-mentioned technical measures are designed to address the stress characteristics of the outer contact piece during crimping. They form a reliable abutment limit at the bending point of the bent outer contact piece to ensure that the pressure of the outer contact piece is clearly transmitted to the upper wall of the mounting plate during crimping. At the same time, they eliminate the interference of the retaining strip on the position of the outer contact piece and prevent the outer contact piece from deforming under stress.

[0030] As one of the preferred technical solutions, the card strip has a wedge block inserted between the top side of the corresponding inner contact piece and the shelf;

[0031] The top side of the wedge has a raised, interference-fit ridge 2, which is used to form an interference fit with the corresponding layer plate.

[0032] The wedge has protruding ridges on both sides in the transverse width direction, which are used to form an interference fit with the corresponding inner contact slot.

[0033] The bottom side of the wedge has a planar structure, which forms a surface contact fit with the top side of the corresponding inner contact piece.

[0034] The aforementioned technical measures result in less positional interference when the clips are inserted into the corresponding contact slots, making them easier to insert. They also provide good stability after insertion and can form a flat abutment support for the inner contact piece, which helps ensure clear force transmission during pressing and prevents deformation of the inner contact piece.

[0035] Furthermore, the card strip mates with multiple sets of power terminals in adjacent positions along the horizontal width of the mounting plate;

[0036] The card strip has a beam body, and multiple protruding wedges are arranged at intervals along the horizontal width direction on the front side of the beam body. Each wedge is used to be inserted between the top side of the corresponding inner contact piece and the shelf. Adjacent wedges have a recessed groove that matches the corresponding partition wall.

[0037] When the card strip is inserted into the corresponding inner contact slot through each wedge, the beam of the card strip is located above and behind the bent part of the inner contact piece.

[0038] The aforementioned technical measures form a "one-to-many" structure for the card strips. While satisfying the filling and limiting of the inner contact piece insertion structure, it helps to simplify the insertion operation of the card strips in the mounting plate, improves the assembly efficiency of the card strips, and further improves the insertion stability of the card strips in the mounting plate.

[0039] Furthermore, the rear side of the beam of the card strip has a protruding clamping portion. This technical feature facilitates the clamping force on the card strip, improving the convenience of card strip insertion and removal.

[0040] Furthermore, at both ends of the beam of the card strip, there are limiting end stops extending from the outside of the wedge blocks at the corresponding edges;

[0041] Correspondingly, the rear side of the mounting plate has a limiting stop that abuts against the inserted clip;

[0042] When the clip is inserted into the rear side of the mounting plate, the limiting end stops at both ends of the clip abut against the limiting stop on the rear side of the mounting plate.

[0043] The above technical measures are based on the back-to-forward insertion characteristic of the card strip on the back side of the mounting plate. Through the cooperation of the limiting stop and the limiting end stop, the insertion accuracy of the card strip on the back side of the mounting plate can be effectively ensured, avoiding the "feeling" error of insertion that is too deep or too shallow, and forming a precise insertion positioning benchmark.

[0044] As one of the preferred technical solutions, the inner contact piece has a base, a finger part at the front of the base, and a pressing part at the rear of the base. The finger part is an upward arc-shaped bending structure, and the base has outwardly protruding fixing small wings on both sides of its horizontal width.

[0045] Correspondingly, the mounting plate has a limiting structure in the corresponding inner contact slot that constrains the fixing wing one. The inner contact piece that is inserted into the corresponding inner contact slot is fitted and limited by the fixing wing one on both sides of the horizontal width of the base one with the mounting plate.

[0046] As one of the preferred technical solutions, the outer contact piece has a base two, a finger part two at the front of the base two, and a pressing part two at the rear of the base two. The finger part two has a downward arc-shaped bending structure, and the base two has outwardly protruding fixing small wings two on both sides of its horizontal width.

[0047] Correspondingly, the mounting plate has a limiting structure in the corresponding outer contact slot that constrains the second fixing wing. The outer contact piece, which is inserted into the corresponding outer contact slot, is fitted and limited by the second fixing wing on both sides of the horizontal width of the base.

[0048] The contact pads of the above-mentioned technical measures not only meet the design technical requirements, but also form a stable insertion limit in the mounting plate through the corresponding fixing fins, and form a precise insertion positioning, avoiding the "feeling" error of insertion being too deep or too shallow.

[0049] As one of the preferred technical solutions, a positioning plate is connected to the bottom rear side of the mounting plate;

[0050] The positioning plate has positioning holes in the height direction corresponding to the outer contact pieces of each group of power terminals;

[0051] Each outer contact piece is fitted inside the mounting plate, and the second pressing part protrudes through the corresponding positioning hole on the positioning plate;

[0052] Furthermore, the positioning plate connected to the rear side of the mounting plate forms a limiting groove between its front edge and the rear edge of the lower wall of the mounting plate, through which the pressing part of each inner contact piece passes through. Each inner contact piece installed in the mounting plate has its pressing part passing through the limiting groove at the front edge of the positioning plate.

[0053] The above technical measures are based on the existing mating relationship between the mounting plate and the positioning plate of the electrical connector. The positioning plate provides vertical support for the crimping part of each contact piece after bending. It can effectively cooperate with the clip structure to form an assembly within the mounting plate, which helps to ensure clear force transmission during crimping of each contact piece and avoid deformation of each contact piece.

[0054] A method for molding the above-mentioned crimp-type printed circuit board connector, the molding method comprising the following process steps:

[0055] Step 1. Obtain the mounting plate, positioning plate, clips, and the corresponding number of power terminals that meet the design requirements;

[0056] The inner and outer contact pieces of each set of power terminals have L-shaped bending structures.

[0057] Step 2. Insert the inner contact piece of the power terminal into the corresponding inner contact piece slot on the mounting plate with the first contact finger as the insertion front end, and push it from back to front until it is in place.

[0058] Step 3. Insert the clip into the top side of the corresponding inner contact piece by pushing it from back to front. The inserted clip will lock and fix the corresponding inner contact piece in the corresponding inner contact piece slot.

[0059] Step 4. Insert the outer contact piece of the power terminal into the corresponding outer contact piece slot on the mounting plate with the second contact finger as the insertion front end, and push it from back to front until it is in place.

[0060] Step 5. Insert the positioning plate from the crimping part of each power terminal in an upward manner, so that the positioned plate is inserted into the bottom rear side of the mounting plate.

[0061] Obtain the finished electrical connector.

[0062] The above-mentioned technical measures address the unique assembly structure between the crimp-type printed circuit board connector and the printed circuit board, as well as the electrical connectors that match the above structure. The pre-bent contact pieces form a back-to-forward assembly process during the assembly of the mounting plate. The assembled contact pieces do not need to undergo L-shaped bending again. This has the technical advantages of the electrical connector with the above structure, namely, while meeting the force requirements of the crimp-type electrical connector during crimping, it eliminates the bending process after assembly, which helps to control the manufacturing cost of the electrical connector. It also has lower requirements for the design and manufacturing precision of the mounting plate, is easier to manufacture, and has high stability and high forming quality after assembly.

[0063] The beneficial technical effects of this utility model are as follows: the above-mentioned technical measures, while meeting the force requirements of crimping electrical connectors, pre-bend the contact pieces to be assembled in the mounting plate according to the design requirements, eliminating the need for post-assembly bending treatment, and thus eliminating the need for special equipment with specific technical requirements and high purchase costs, which is conducive to controlling the manufacturing cost of electrical connectors; moreover, the pre-bent contact pieces do not need to rely on the structure of the mounting plate for guiding bending, which reduces the technical requirements for the design and manufacturing precision of the mounting plate and makes it easier to manufacture; the pre-bent contact pieces do not exhibit elastic recovery deformation after assembly, resulting in high stability after assembly and high quality of the final formed electrical connector. Attached Figure Description

[0064] Figure 1 This is a schematic diagram of one structure of the present utility model.

[0065] Figure 2 for Figure 1 Vertical cross-sectional view (in the front-to-back direction).

[0066] Figure 3 This is an exploded view of the present invention.

[0067] Figure 4 for Figure 1 Partial top view of the horizontal cross-section at point A in the diagram.

[0068] Figure 5 for Figure 1 A partial structural diagram of the mounting plate at the rear end (i.e., the output end).

[0069] Figure 6 for Figure 1 , Figure 2 and Figure 4 A schematic diagram of the card strip structure.

[0070] Figure 7 This is a schematic diagram of the inner contact piece of this utility model before bending.

[0071] Figure 8This is a schematic diagram of the inner contact piece of this utility model after bending.

[0072] The symbols in the diagram have the following meanings: 1—Mounting plate; 11—Upper wall plate; 12—Lower wall plate; 13—Partition wall; 14—Outer contact plate slot; 15—Inner contact plate slot; 2—Inner contact plate; 21—Base 1; 22—Touch finger 1; 23—Crimping part 1; 24—Fixing wing 1; 3—Outer contact plate; 31—Base 2; 32—Touch finger 2; 33—Crimping part 2; 34—Fixing wing 2; 4—Clamping strip; 41—Beam; 42—Wedge; 43—Leaning groove; 44—Clamping part; 45—Limiting end stop; 46—Interference rib 1; 47—Interference rib 2; 5—Positioning plate; 51—Positioning hole; 52—Limiting groove. Detailed Implementation

[0073] This utility model relates to the field of electrical connector technology, specifically a crimp-type printed circuit board connector. The main technical solution of this utility model will be described in detail below with reference to several embodiments. Embodiment 1 is illustrated in conjunction with the accompanying drawings—that is… Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 The technical solution of this utility model is clearly and thoroughly explained; although other embodiments are not shown in separate drawings, their main structures can still be referred to the drawings of Embodiment 1.

[0074] It should be noted that the accompanying drawings of this utility model are schematic, and unnecessary details have been simplified to clarify the technical purpose of this utility model, so as to avoid obscuring the technical solution contributed by this utility model to the prior art. In addition, the expressions such as "about" and "basically" regarding quantity or fit relationship in the following text mean that reasonable assembly errors and processing errors are allowed in the industry, and do not literally describe absolute quantity or fit relationship.

[0075] Example 1

[0076] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the connector of this utility model includes an insulating mounting plate 1, a positioning plate 5, a retaining strip 4, and multiple sets of power terminals formed of conductive metal.

[0077] Specifically, the mounting plate 1 has an upper wall plate 11 and a lower wall plate 12, and multiple partitions 13 (including vertical wall plates with ends located between the upper wall plate 11 and the lower wall plate 12) arranged along the horizontal width direction (i.e., the left-right direction relative to the input / output terminals) between the upper wall plate 11 and the lower wall plate 12. These partitions 13 divide the upper wall plate 11 and the lower wall plate 12 into multiple sets of insertion slots for mounting power terminals and signal terminals. The technical contribution of this utility model lies in the insertion slots for mounting power terminals divided by the partitions 13, and the associated insertion structure.

[0078] In the mounting plate 1, between the left and right adjacent partitions 13 (i.e., in the horizontal direction) of each insertion slot used for mounting power terminals, there is a shelf 16 that divides the insertion slot into relatively independent vertical insertion spaces (the aforementioned upper and lower positions are relative to the top and bottom heights of the mounting plate). Thus, between the left and right adjacent partitions 13 of each insertion slot used for mounting power terminals, there are upper and lower layered, relatively independent outer contact slots 14 and inner contact slots 15.

[0079] It should be noted that the partition wall 13 and the shelf 14 of the mounting plate 1 are formed at the middle-rear part of the mounting plate 1 in the front-back direction (i.e., the direction between the input end and the output end). The insertion slots at the front part (i.e., the input end) of the mounting plate 1 are continuous in the horizontal width direction so that the supporting equipment can form an electrical connection with the power terminal and signal terminal during use. The space at the rear part (i.e., the output end) of the mounting plate 1 is used for the bending and arrangement of the contact pieces and the arrangement of the retaining strip 4 and the positioning plate 5.

[0080] Each set of power terminals consists of an inner contact piece 2 and an outer contact piece 3.

[0081] The inner contact piece 2 comprises an integrally formed base 21, a contact finger 22 located at the front of the base 21 (relative to the input / output terminals of the mounting plate), and a crimping portion 23 located at the rear of the base 21 (relative to the input / output terminals of the mounting plate). To accommodate electrical connection plugging and unplugging during use, the contact finger 22 has an upward (relative to the top and bottom height of the mounting plate) arc-shaped structure to match the outer contact piece 3. The contact finger 22 can also be forked in the horizontal direction. To accommodate the crimping assembly relationship with the printed circuit board, the crimping portion 23 has vertically elliptical micro-deformation holes, similar to "fisheyes." Such contact pieces are also known in the industry as fisheye contact pieces. Of course, multiple fisheye structures on the same contact piece can be formed by forking. Figure 8 As shown, the inner contact piece 2, before assembly on the mounting plate 1, is pre-bent into an L-shaped bending structure from the middle and rear part of the substrate 21, i.e., by... Figure 7 The straight plate structure is bent into Figure 8The L-shaped bending structure. In order to enable the inner contact piece 2 to form a precise and stable assembly in the corresponding inner contact piece slot 15 of the mounting plate 1, the base 21 at the front side of the bending part has convex, toothed fixing fins 24 on both sides of the horizontal width.

[0082] The outer contact piece 3 has an integrally formed base 31, a contact finger 32 at the front of the base 31, and a crimping part 33 at the rear of the base 31. To accommodate electrical connection insertion and removal during use, the contact finger 32 has a downwardly curved structure to match the inner contact piece 2. Before assembly on the mounting plate 1, the outer contact piece 3 is pre-bent into an L-shaped structure from the middle and rear of the base 31. To ensure precise and stable assembly of the outer contact piece 3 within the corresponding outer contact piece slot 14 of the mounting plate 1, two protruding, toothed fixing fins 34 are respectively provided on both sides of the horizontal width of the base 31 at the front of the bent portion.

[0083] Regarding the structural form of the outer contact piece 3 of the aforementioned power terminal, the structural dimensions of the outer contact piece slot 14 within the mounting plate 1 allow the outer contact piece 3 of the corresponding power terminal to pass through from back to front. In other words, the structural dimensions of the outer contact piece slot 14 match the three-dimensional contour structure of the second contact finger 32 of the corresponding outer contact piece 3, allowing the second contact finger 32 of the corresponding outer contact piece 3 to be pushed forward from the rear side of the mounting plate as the insertion front. Of course, to accommodate the insertion depth positioning and anti-loosening limit of the inserted outer contact piece 3, the top left and right side partitions 13 of the corresponding outer contact piece slot 14 have limiting slots that match the fixing fins 34 on the outer contact piece 3.

[0084] Regarding the structural form of the inner contact piece 2 of the aforementioned power terminal, the structural dimensions of the inner contact slot 15 within the mounting plate 1 allow the inner contact piece 2 of the corresponding power terminal to pass through from back to front. In other words, the structural dimensions of the inner contact slot 15 match the three-dimensional contour structure of the contact finger portion 22 of the corresponding inner contact piece 2, allowing the contact finger portion 22 of the corresponding inner contact piece 2 to be pushed forward from the rear side of the mounting plate as the insertion front. Of course, to accommodate the insertion depth positioning and anti-loosening limit of the inserted inner contact piece 2, the bottom left and right side partitions 13 of the corresponding inner contact slot 15 have limiting slots that match the fixing fins 24 on the inner contact piece 2.

[0085] As described above, the outer contact piece 3 of the power terminal has an L-shaped bent structure before being inserted into the mounting plate 1. The outer contact piece 3 is inserted into the corresponding outer contact piece slot 14 of the mounting plate 1 in a back-to-forward pushing manner. The outer contact piece 3, after being inserted into the corresponding outer contact piece slot 14, is fitted and positioned on the outside of the inner contact piece 2 of the same power terminal by the fixing small wings 34 on both sides of the horizontal width of the base 2 31 and the limiting slot in the corresponding outer contact piece slot 14.

[0086] The outer contact piece 3, once inserted into place, has its second contact finger 32 extending forward to the front of the mounting plate 1. The downwardly curved arc structure of the second contact finger 32, in conjunction with the inserted inner contact piece 2, forms an elastic contact "gold finger" for electrical connection. The bent portion of the outer contact piece 3 is located inside the rear edge of the upper wall plate 11 of the mounting plate 1, meaning the rear edge of the upper wall plate 11 of the mounting plate 1 extends behind the bent portion of the outer contact piece 3. The second pressing portion 33 of the outer contact piece 3 extends downward to the lower rear side of the lower wall plate 12 of the mounting plate 1, serving as a pressing termination for contact with the printed circuit board. To satisfy the aforementioned "gold finger" mating relationship, the top side of the base 31 of the outer contact piece 3 abuts against the upper wall plate 11 of the outer contact piece slot 14. Of course, this abutment requires the limiting slot in the outer contact piece slot 14 to be inserted and mated with the fixing wing 34. The positioning plate 5 described below provides limiting support, as well as limiting support during the pressing with the printed circuit board, resulting in good stability. Since the top side of the outer contact piece 3 abuts against the upper wall plate 11 of the mounting plate 1, the rigid support limiting required by the design is achieved. As for the excess space in the outer contact piece slot 14, it does not need to be filled and can be left empty.

[0087] As described above, the inner contact piece 2 of the power terminal has an L-shaped bent structure before being inserted into the mounting plate 1. The inner contact piece 2 is inserted into the corresponding inner contact piece slot 15 of the mounting plate 1 in a back-to-forward pushing manner. The inner contact piece 2, after being inserted into the corresponding inner contact piece slot 15, is engaged with the limiting slot in the corresponding inner contact piece slot 15 by the fixing small wings 24 on both sides of the horizontal width of the base 21, thereby forming a fitting limit in the mounting plate 1, and is located inside the outer contact piece 3 of the same power terminal.

[0088] The inner contact piece 2, once inserted into place, has its finger portion 22 extending forward to the front of the mounting plate 1. The upwardly curved arc structure of the finger portion 22, in conjunction with the inserted outer contact piece 3, forms an elastic contact "gold finger" for electrical connection. The crimping portion 23 of the inner contact piece 2 extends downward to the lower rear side of the lower wall plate 12 of the mounting plate 1, and is used for crimping termination with the printed circuit board. To satisfy the aforementioned "golden finger" mating relationship, the bottom side of the base 21 of the inner contact piece 2 sits on the lower wall plate 12 at the inner contact piece slot 15. The limiting slot in the inner contact piece slot 15 and the fixing wing 24 are inserted and mated to form a preliminary limiting. The top side of the inner contact piece 2 and the shelf 16 at the inner contact piece slot 15 do not form a direct abutting mating relationship, but rather a gap mating relationship. This single mating structure is relatively difficult to meet the design requirements for stable rigid support limiting. Therefore, the following retaining strip 4 is inserted from back to front between the top side of the inner contact piece 2 and the shelf 16. The retaining strip 4 serves as an intermediate transition support structure to abut the inner contact piece 2 at the shelf 16 of the mounting plate 1, so as to achieve the design requirements for rigid support limiting and improve stability. The aforementioned insertable clip 4 is located at the bent portion of the inner contact piece 2. The rear edge of the clip 4 extends from the rear side of the bent portion of the inner contact piece 2 and is located in front of the corresponding outer contact piece 3, with a spacing matching the corresponding outer contact piece 3.

[0089] The aforementioned clip 4 mates with multiple sets of power terminals adjacent to each other in the horizontal direction of the mounting plate 1, for example... Figure 6 The three sets shown. This type of "one-to-many" clip 4 has a beam 41. On the front side of the beam 41 (relative to the front-rear direction of the mounting plate 1), there are multiple protruding wedges 42 arranged at intervals along the horizontal width direction. Each wedge 42 is used to insert between the top side of the corresponding inner contact piece 2 and the shelf 16. There is a recessed groove 43 between adjacent wedges 42 that matches the corresponding partition wall 13. There is a protruding clamping part 44 at the middle of the rear side of the beam 41.

[0090] When the clip 4 is inserted into the rear side of the mounting plate 1, the clamping part 44 of the clip 4 causes each wedge 42 on the front side of the clip 4 to be inserted into the space gap left on the top side of the corresponding inner contact piece 2. At this time, the beam 41 of the clip 4 is above and behind the bent part of the inner contact piece 2, serving as the rear edge of the clip 4.

[0091] To ensure the stability of each wedge 42 of the card strip 4 when inserted into the corresponding inner contact slot 15, and to provide stable abutment support for the corresponding inner contact piece 2, each wedge 4 of the card strip 4 has a raised second interference ridge 47 on its top side for forming an interference fit with the corresponding layer plate 16. These interference ridges 47 are preferably multiple ridges arranged along the transverse width of the wedge 42, thus achieving both interference fit and ensuring stress stability after insertion, preventing warping. Each wedge 42 of the card strip 4 has raised first interference ridges 46 on both sides of its transverse width for forming an interference fit with the sides of the corresponding inner contact slot 15. The bottom side of each wedge 42 of the card strip 4 is a planar structure, forming a surface contact fit with the top side of the corresponding inner contact piece 2.

[0092] To ensure the accuracy of the insertion of the retaining strip 4 from back to front on the rear side of the mounting plate 1, the retaining strip 4 has limiting end stops 45 extending from the outer side of the wedge block 42 at both ends of the beam body 41. Correspondingly, the rear side of the mounting plate 1 has a limiting stop that abuts against the retaining strip 4 when it is inserted into place. When the retaining strip 4 is inserted into place on the rear side of the mounting plate 1, the limiting end stops 45 at both ends of the retaining strip 4 abut against the limiting stop on the rear side of the mounting plate 1.

[0093] The positioning plate 5 is inserted into the bottom rear side of the mounting plate 1 in an upward pushing motion, with the positioning plate 5 connected to the bottom side of the retaining strip 4. The positioning plate 5 is used to straighten the contact pieces of each power terminal and signal terminal. Therefore, the positioning plate 5 has positioning holes 51 in the height direction corresponding to the outer contact pieces 3 of each group of power terminals, and a limiting groove 52 at the front edge corresponding to the inner contact pieces 2 of each group of power terminals. The same applies to each signal terminal. The outer contact pieces 3 of each group of power terminals that are inserted into the mounting plate 1 have corresponding pressing parts 23 that extend downward through the corresponding positioning holes 51 on the positioning plate 5. At the same time, since the positioning plate 5 connected to the rear side of the mounting plate 1 forms a limiting insertion structure at the rear edge of the lower wall plate 12 of the mounting plate 1 through the limiting groove 52 at the front edge, the inner contact pieces 2 that are inserted into the mounting plate 1 have corresponding pressing parts 23 that extend out of the limiting groove 52 at the front edge of the positioning plate 5.

[0094] The forming method for an electrical connector with the above structure includes the following process steps:

[0095] Step 1. Separate manufacturing to obtain mounting plates, positioning plates, clips, and the corresponding number of power terminals that meet the design requirements;

[0096] The inner and outer contact pieces of each set of power terminals have L-shaped bending structures.

[0097] Step 2. Insert the inner contact piece of the power terminal into the corresponding inner contact piece slot of the mounting plate from back to front (relative to the front and back of the mounting plate) with the first contact finger as the insertion front end, until it is inserted in place.

[0098] Step 3. Insert the card strip wedge block as the insertion front end into the top side of the corresponding inner contact piece in a backward-forward pushing manner. The inserted card strip will lock and fix the corresponding inner contact piece in the corresponding inner contact piece slot.

[0099] Step 4. Insert the outer contact piece of the power terminal into the corresponding outer contact piece slot on the mounting plate with the second contact finger as the insertion front end, and push it from back to front until it is in place.

[0100] Step 5. Insert the positioning plate from the crimping part of each power terminal in a bottom-up manner (relative to the height direction of the mounting plate) so that the positioned plate is inserted into the bottom rear side of the mounting plate.

[0101] Obtain the finished electrical connector.

[0102] Example 2

[0103] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0104] Each card slot on the mounting plate corresponds to a single inner contact slot, meaning one card slot is inserted into one inner contact slot, and the card slots inserted into adjacent inner contact slots are independent of each other.

[0105] In this embodiment, the beam of the card strip is eliminated, and the resulting card strip has a wedge on the front and a clamping part on the back.

[0106] Example 3

[0107] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0108] The clamping part on the back of the card strip is removed, and the beam itself is used as the clamping part.

[0109] Example 4

[0110] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0111] The protruding structure of the fixing wing on the inner contact piece is enlarged and formed. The fixing wing is used to form a constraint limit by interlocking with the corresponding inner contact piece slot, thus eliminating the wedge-tightening structure of the card strip.

[0112] The above embodiments are only used to illustrate the present invention and are not intended to limit it.

[0113] Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications can still be made to the above embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the present invention.

Claims

1. A press-type printed circuit board connector, comprising a mounting plate (1) and a plurality of power terminal groups; Each power terminal group has a relatively independent inner contact piece (2) and an outer contact piece (3); The mounting plate (1) is arranged with contact piece slots for passing through the power terminals, and the contact piece slots of the same group are separated by a layer plate (16) into upper and lower relatively independent outer contact piece slots (14) and inner contact piece slots (15); Characterized in that: The outer contact piece slots (14) are sized to allow the outer contact pieces (3) of the corresponding power terminals to pass through from back to front; The inner contact piece slots (15) are sized to allow the inner contact pieces (2) of the corresponding power terminals to pass through from back to front; The outer contact pieces (3) of the power terminals are L-shaped before being bent and installed, and the outer contact pieces (3) that have been installed in the corresponding outer contact piece slots (14) are limited; The inner contact pieces (2) of the power terminals are L-shaped before being bent and installed, and the inner contact pieces (2) that have been installed in the corresponding inner contact piece slots (15) are limited.

2. The press-type printed circuit board connector according to claim 1, characterized in that: When the outer contact pieces (3) are installed in the corresponding outer contact piece slots (14), the top side of the outer contact pieces (3) abuts against the upper wall plate (11) at the outer contact piece slots (14).

3. The press-type printed circuit board connector according to claim 1, characterized in that: When the inner contact pieces (2) are installed in the corresponding inner contact piece slots (15), the top side of the inner contact pieces (2) is spaced apart from the layer plate (16) at the inner contact piece slots (15); And, a clamping strip (4) that abuts against the inner contact pieces (2) is filled in the space between the top side of the inner contact pieces (2) and the corresponding layer plate (16).

4. The press-type printed circuit board connector according to claim 3, characterized in that: The clamping strip (4) is inserted in the space between the top side of the inner contact pieces (2) and the corresponding layer plate (16) at the bending position of the inner contact pieces (2), and the rear edge of the clamping strip (4) extends out from the rear side of the bending position of the inner contact pieces (2).

5. The press-type printed circuit board connector according to claim 4, characterized in that: The rear edge of the clamping strip (4) is spaced apart from the front side of the corresponding outer contact piece (3); The bending position of the outer contact piece (3) is in front of the rear edge of the upper wall plate (11) of the mounting plate (1).

6. The press-type printed circuit board connector according to claim 3, 4 or 5, characterized in that: The clamping strip (4) has a wedge block (42) that is inserted between the top side of the corresponding inner contact piece (2) and the layer plate (16); The wedge block (42) has a protruding interference ridge two (47) at the top side, which is used to form an interference fit with the corresponding layer plate (16); The wedge block (42) has protruding interference ridge one (46) at both sides, which is used to form an interference fit with both sides of the corresponding inner contact piece slot (15). The bottom side of the wedge (42) is a planar structure, and forms a surface contact with the top side of the corresponding inner contact piece (2).

7. The crimped printed circuit board connector of claim 6, wherein: The card strip (4) is matched with multiple groups of power terminals of adjacent positions in the transverse width direction of the mounting plate (1); The card strip (4) has a beam body (41), multiple protruding wedges (42) are arranged on the front side of the beam body (41) in the transverse width direction, each wedge (42) is used for being inserted between the top side of the corresponding inner contact piece (2) and the layer plate (16), and the wedges (42) are matched with the accommodation grooves (43) of the corresponding partition walls (13) and have a recessed structure therebetween; When the card strip (4) is inserted into the inner contact piece slot (15) through the wedges (42), the beam body (41) of the card strip (4) is located above and at the rear side of the bending position of the inner contact piece (2).

8. The crimped printed circuit board connector of claim 7, wherein: The rear side of the beam body (41) of the card strip (4) has a protruding clamping portion (44).

9. The crimped printed circuit board connector of claim 7 or 8, wherein: The beam body (41) of the card strip (4) has a limiting end stop (45) extending from the outer side of the wedge (42) at the corresponding edge portion at both ends of the beam body (41); Correspondingly, the rear side of the mounting plate (1) has a limiting stop for abutting the limiting end stop (45) of the card strip (4) inserted into position; When the card strip (4) is inserted into position at the rear side of the mounting plate (1), the limiting end stop (45) at both ends of the card strip (4) abuts on the limiting stop at the rear side of the mounting plate (1).

10. The crimped printed circuit board connector of claim 1, wherein: The inner contact piece (2) has a base body one (21), a contact finger portion one (22) at the front portion of the base body one (21), and a crimping portion one (23) at the rear portion of the base body one (21), the contact finger portion one (22) is an upward arc-shaped bending structure, and the transverse width sides of the base body one (21) respectively have outward protruding fixed wings one (24); Correspondingly, the inner contact piece slot (15) of the mounting plate (1) has a limiting structure for restricting the fixed wings one (24), and the inner contact piece (2) inserted into position in the inner contact piece slot (15) is limited by the fixed wings one (24) at the transverse width sides of the base body one (21) and the mounting plate (1); The outer contact piece (3) has a base body two (31), a contact finger portion two (32) at the front portion of the base body two (31), and a crimping portion two (33) at the rear portion of the base body two (31), the contact finger portion two (32) is a downward arc-shaped bending structure, and the transverse width sides of the base body two (31) respectively have outward protruding fixed wings two (34); Correspondingly, the mounting plate (1) has a limiting structure in the corresponding outer contact piece slot (14) to constrain the fixed small wings (34). The outer contact piece (3) that is installed in the corresponding outer contact piece slot (14) is limited by the mounting plate (1) through the fixed small wings (34) on both sides of the base (31).

11. The crimped printed circuit board connector according to claim 1 or 10, characterized in that: The rear side of the mounting plate (1) is connected with a positioning plate (5); The positioning plate (5) is provided with a positioning hole (51) corresponding to the outer contact piece (3) of each group of power terminals in the height direction; Each outer contact piece (3) installed in the mounting plate (1) has a crimping part (33) that passes through the corresponding positioning hole (51) on the positioning plate (5); And the positioning plate (5) connected to the rear side of the mounting plate (1) has a limiting groove (52) for the crimping part (23) of each inner contact piece (2) to pass through between the front edge and the rear edge of the lower wall plate (12) of the mounting plate (1). Each inner contact piece (2) installed in the mounting plate (1) has a crimping part (23) that passes through the limiting groove (52) at the front edge of the positioning plate (5).

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