Crimping type printed circuit board connector and forming method thereof

Abstract

The invention relates to the technical field of electric connectors, and particularly discloses a crimping type printed circuit board connector and a forming method thereof. Wherein the connector 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 method has the technical characteristics of easiness in manufacturing and high forming quality.

Description

Technical Field

[0001] The invention relates to the technical field of electric connectors, in particular to a crimping type printed circuit board connector and a molding method of the connector. Background Art

[0002] Printed circuit boards (PCBs) are important electronic components and support the electronic components. They need to be connected to electrical connectors to meet the technical requirements of electrical connection of electronic components. Therefore, the connection structure between the electrical connector and the printed circuit board will directly affect the performance of the finished printed circuit board.

[0003] There are two types of connection structures between electrical connectors and printed circuit boards: soldering termination and crimping termination. Among them, crimping termination is to apply pressure to the electrical connector so that the lead end of the power terminal (i.e., the crimping part) is inserted into the corresponding plated hole of the printed circuit board to achieve a tight connection. It is a solderless termination. In order to adapt to the arrangement of the electrical connector on the printed circuit board and crimping termination, the power terminal of the electrical connector is L-shaped between the mounting plate of the electrical connector and the printed circuit board, and the lead end of the power terminal of the electrical connector is a flexible structure that can be squeezed and deformed - i.e., a fisheye structure. In this way, when the electrical connector is crimped and assembled on the printed circuit board, pressure is applied to the top of the mounting plate of the electrical connector so that the lead end of the power terminal of the electrical connector collapses flexibly and is inserted into the corresponding plated hole of the printed circuit board, but this flexible collapse still retains sufficient spring force to maintain an airtight connection with the plated hole of the printed circuit board. Obviously, the crimping termination method of the electrical connector on the printed circuit board does not require welding, and electrical connection can be achieved by simply inserting it. This is not only conducive to improving the assembly efficiency between the electrical connector and the printed circuit board and reducing the assembly cost, but also eliminates the negative effects of welding, including effectively protecting heat-sensitive components from possible damage and greatly reducing thermal stress on the electrical connector.

[0004] Based on the assembly structure between the above-mentioned crimping type printed circuit board connector and the printed circuit board, the inner contact piece and the outer contact piece constituting each power terminal of the electrical connector need to form abutment with the top relative structure constituting the corresponding contact piece slot (the top relative structure of the inner contact piece slot is the layer plate between the inner contact piece slot and the outer contact piece slot, and the top relative structure of the outer contact piece slot is the upper wall plate of the mounting plate - that is, the top plate) when they are inserted into the corresponding inner contact piece slot and the outer contact piece slot of the mounting plate to ensure that the contact piece will not be deformed when the crimping force is transmitted. This requires that the structural dimensions of the corresponding contact piece slot on the mounting plate match the base contour of the inner and outer contact pieces, and only allow the inner and outer contact pieces to pass through the corresponding contact piece slot with a slight gap. In addition, since the front part of the inner contact piece has a contact finger portion with an upward arc-shaped curved structure, and the front part of the outer contact piece has a contact finger portion with a downward arc-shaped curved structure, the inner and outer contact pieces are not flat thin plate structures, but three-dimensional structures with certain spatial structural dimensions at the front. In this way, when the inner and outer contact pieces constituting the power terminal are inserted into the corresponding contact piece slots of the mounting plate, they must be inserted from front to back and then bent into shape, that is: Before wearing, the inner and outer contact pieces are straight plate structures except for the three-dimensional structure at the front; When inserting, the crimping parts of the inner and outer contact pieces are used as the front end of the insertion, and the contact pieces are inserted from the front to the back through the corresponding contact piece slots of the mounting plate; After installation, the crimping parts of the inner and outer contact pieces extend straightly at the rear side of the mounting plate. To adapt to the connection with the printed circuit board, the inner and outer contact pieces need to be bent into an L shape, so that the contact fingers of the inner and outer contact pieces after bending face forward in the mounting plate and the crimping parts face downward at the rear side of the mounting plate. Such technology is shown in the Chinese patent document entitled “Electrical connector and method for manufacturing the same”, with publication number CN 102832472 A and publication date December 19, 2012.

[0005] However, the technical problems with this technology are: 1. It is necessary to use special equipment with high technical requirements to perform L-shaped bending and shaping on the inner and outer contact pieces that have been installed on the rear side of the mounting plate. The purchase cost of the special equipment is high, which increases the manufacturing cost of the electrical connector; 2. Even if special equipment is used to bend and shape the inner and outer contact sheets at the rear side of the mounting plate, the bending parts of the inner and outer contact sheets are required to be bent based on the structure of the mounting plate (such as the lower wall plate - the bottom plate, the contact sheet slot layered layer plate - the partition plate), which puts forward high technical requirements on the design and manufacturing accuracy of the mounting plate and increases the technical difficulty; 3. Since the inner and outer contact pieces are spring structures with certain elastic properties, it is difficult for the inner and outer contact pieces to achieve the bending accuracy required by the design by the post-installation bending performed on the rear side of the mounting plate, which is not conducive to the quality assurance of the finished electrical connector. Summary of the invention

[0006] The technical purpose of the present invention is to provide a crimped printed circuit board connector that is easy to manufacture and has high molding quality, as well as a molding method for the connector, in view of the particularity of the assembly structure between the above-mentioned crimped printed circuit board connector and the printed circuit board and the shortcomings of the prior art.

[0007] The technical purpose of the present invention is achieved by the following technical solution: a crimping printed circuit board connector, comprising a mounting plate and a plurality of groups of power terminals; Each group of power terminals has relatively independent inner contact pieces and outer contact pieces; The mounting plate is provided with contact slots for inserting each group of power terminals, and the same group of contact slots is divided into relatively independent outer contact slots and inner contact slots by the layer plate; The structural dimensions of the outer contact sheet slot allow the outer contact sheet of the corresponding power terminal to pass through from the back to the front; The structural dimensions of the inner contact sheet slot allow the inner contact sheet of the corresponding power terminal to pass through from the back to the front; The outer contact piece of the power terminal is an L-shaped bending structure before installation, and the outer contact piece installed in place in the corresponding outer contact piece slot is limited; The inner contact piece of the power terminal is an L-shaped bending structure before being installed, and the inner contact piece installed in place in the corresponding inner contact piece slot is limited.

[0008] Furthermore, when the outer contact piece is inserted into the corresponding outer contact piece slot and is in place, the top side of the outer contact piece abuts against the upper wall plate at the outer contact piece slot.

[0009] Furthermore, when the inner contact piece is inserted into the corresponding inner contact piece slot and is in place, a spacing fit is formed between the top side of the inner contact piece and the layer plate at the inner contact piece slot; Furthermore, a clamping strip abutting against the inner contact piece is filled in the matching space between the top side of the inner contact piece and the corresponding layer plate.

[0010] The above technical measures aim at the special assembly structure between the above-mentioned crimping printed circuit board connector and the printed circuit board, and expand the contact slot in the mounting plate to allow the front contact finger of the corresponding contact piece to pass through, so that the corresponding contact piece is installed from back to front in the assembly structure in the mounting plate. This assembly method can pre-form the contact piece to be assembled into a precise L-shaped bending structure that meets the design requirements, and it does not need to be L-shaped after being assembled in place on the mounting plate. At the same time, 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, and the excess gap of the outer contact slot where the outer contact piece is located does not need to be filled; while the excess gap of the inner contact slot where the inner contact piece is located is filled by the card strip of the plug-in combination, and the card strip abuts against the layer plate of the inner contact slot where it is located and abuts against the inner contact piece; in this way, the force technical requirements of the inner and outer contact pieces during crimping are effectively met.

[0011] It can be seen that the above-mentioned technical measures, while meeting the technical requirements for force during crimping of crimp-type electrical connectors, pre-bend the contact pieces to be assembled in the mounting plate in accordance with the design requirements, eliminating the bending process after assembly, and thus eliminating the need for special equipment with specific technical requirements and high purchase costs, which is beneficial to controlling the manufacturing cost of the electrical connector; and the pre-bent contact pieces do not need to rely on the structure of the mounting plate for guided bending, and have low technical requirements for the design and manufacturing precision of the mounting plate, making them easy to manufacture; the pre-bent contact pieces do not experience elastic recovery deformation after assembly, and have high stability after assembly, and the final formed electrical connector has high quality.

[0012] As one of the preferred technical solutions, the clamping strip is inserted into the matching space between the top side of the inner contact piece and the corresponding layer board at the bending part of the inner contact piece, and the rear edge of the clamping strip extends out from the rear side of the bending part of the inner contact piece. This technical measure is aimed at the stress characteristics of the inner contact piece during crimping, and forms a reliable abutment limit for the bent inner contact piece at the bending part, so as to ensure that the inner contact piece during crimping can clearly transfer the pressure to the clamping strip, and avoid the inner contact piece from being deformed by stress.

[0013] As one of the preferred technical solutions, the rear edge of the card strip is located at the front side of the corresponding outer contact piece and matches the spacing of the corresponding outer contact piece; The bending portion of the outer contact piece is located in front of the rear edge of the upper wall plate of the mounting plate.

[0014] The above-mentioned technical measures are aimed at the stress characteristics of the outer contact piece during crimping, and form a reliable abutment limit for the bent outer contact piece at the bending position to ensure that the outer contact piece during crimping can clearly transfer the pressure to the upper wall plate of the mounting plate, while eliminating the interference of the card strip on the position of the outer contact piece, thereby avoiding the outer contact piece from being deformed due to stress.

[0015] As one of the preferred technical solutions, the clamping strip has a wedge inserted between the top side of the corresponding inner contact piece and the layer plate; The top side of the wedge block is provided with a convex interference ridge 2 for forming an interference fit with the corresponding layer plate; The wedge block has protruding ridges 1 on both sides of the transverse width direction, which are used to form interference fit with the two sides of the corresponding inner contact slot; The bottom side of the wedge block is a planar structure, forming a surface contact fit with the top side of the corresponding inner contact piece.

[0016] The card strip of the above technical measures has less position interference and is easy to insert when inserted into the corresponding contact piece slot. It has good stability after insertion and can form a flat abutment support for the inner contact piece, which is beneficial to ensure that the inner contact piece transmits force clearly during crimping and avoids deformation of the inner contact piece.

[0017] Furthermore, the clamping strip is matched with multiple groups of power terminals at adjacent positions in the horizontal width direction of the mounting plate; The clamping strip has a beam body, and a plurality of protruding wedge blocks are arranged at intervals along the horizontal width direction on the front side of the beam body, each wedge block is used to be inserted between the top side of the corresponding inner contact sheet and the layer plate, and there is a recessed structure between adjacent wedge blocks, which matches the corresponding partition wall; When the clamping strip is inserted into the corresponding inner contact sheet slot through the wedge blocks, the beam body of the clamping strip is located above and behind the bending portion of the inner contact sheet.

[0018] The card strip of the above technical measures forms a "one-to-many" structural form. Under the premise of satisfying the filling and limiting of the penetration structure of the inner contact piece, it is conducive to simplifying the insertion operation of the card strip in the mounting plate, improving the assembly efficiency of the card strip, and is conducive to further improving the insertion stability of the card strip in the mounting plate.

[0019] Furthermore, the rear side of the beam body of the clamping strip has a protruding clamping portion. This technical measure makes it easy to clamp and apply force to the clamping strip, which is conducive to improving the convenience of inserting and removing the clamping strip.

[0020] Furthermore, at both ends of the beam body of the clamping strip, there are limit end stops extending from the outer sides of the wedge blocks at the corresponding edges; Correspondingly, the rear side of the mounting plate has a limit stop for abutting against the clamping strip inserted into place; When the clamping strip is inserted into place at the rear side of the mounting plate, the limit end stops at both ends of the clamping strip abut against the limit stop openings at the rear side of the mounting plate.

[0021] The above-mentioned technical measures are based on the characteristic of the card strip being inserted from back to front on the rear side of the mounting plate. Through the matching relationship between the limit stop and the limit end stop, it can effectively ensure the insertion accuracy of the card strip on the rear side of the mounting plate, avoid the "feeling" error of inserting too deep or too shallow, and form an accurate insertion positioning reference.

[0022] As one of the preferred technical solutions, the inner contact piece comprises a base body, a contact finger portion located in the front of the base body, and a crimping portion located in the rear of the base body. The contact finger portion is an upward arc-shaped curved structure, and the base body has a convex fixed winglet on both sides of the horizontal width. Correspondingly, the corresponding inner contact slot of the mounting plate has a limiting structure for constraining the fixed wing 1. The inner contact piece installed in the corresponding inner contact slot is limited by the fixed wing 1 on both sides of the horizontal width of the base and the mounting plate.

[0023] As one of the preferred technical solutions, the outer contact piece has a base body 2, a contact finger part 2 located at the front of the base body 2, and a crimping part 2 located at the rear of the base body 2, the contact finger part 2 is a downward arc-shaped curved structure, and the base body 2 has two convex fixed wings on both sides of the horizontal width; Correspondingly, the corresponding outer contact piece slot of the mounting plate has a limiting structure for constraining the fixed small wing 2. The outer contact piece installed in the corresponding outer contact piece slot is limited by the fixed small wing 2 on both sides of the horizontal width of the second base and the mounting plate.

[0024] The contact pieces of the above technical measures can not only meet the design technical requirements, but also form a stable insertion limit in the mounting plate through the corresponding fixed winglets, and can form precise insertion positioning to avoid the "feeling" error of inserting too deep or too shallow.

[0025] As one of the preferred technical solutions, a positioning plate is connected to the bottom of the rear side of the mounting plate; The positioning plate is provided with positioning holes corresponding to the outer contact pieces of each group of power terminals in the height direction; Each outer contact piece is inserted into the mounting plate, and the second crimping portion is inserted into the corresponding positioning hole on the positioning plate; Furthermore, the positioning plate connected in place at the rear side of the mounting plate forms a limiting groove between the front edge and the rear edge of the lower wall plate of the mounting plate for the crimping portion of each inner contact piece to pass through, and the crimping portion of each inner contact piece installed in the mounting plate passes through the limiting groove at the front edge of the positioning plate.

[0026] The above technical measures are based on the matching relationship between the mounting plate and the positioning plate of the existing electrical connector. The positioning plate vertically supports the crimping portion of each contact piece after bending, which can effectively cooperate with the card strip structure to form an assembly in the mounting plate, which is beneficial to ensure that each contact piece clearly transmits force during crimping and avoids deformation of each contact piece.

[0027] A molding method of the above-mentioned crimp-type printed circuit board connector, the molding method comprising the following process steps: Step 1. Obtain the mounting plate, positioning plate, clamping strip and corresponding number of power terminals that meet the design requirements; The inner contact piece and the outer contact piece of each group of power terminals are L-shaped bending structures respectively; Step 2. Insert the inner contact piece of the power terminal into the corresponding inner contact piece slot of the mounting plate by pushing it from back to front, with the contact finger 1 as the insertion front end, until it is inserted into place; Step 3. Insert the card strip into the top side of the corresponding inner contact piece by pushing it forward from the back. The inserted card strip will clamp and fix the corresponding inner contact piece in the corresponding inner contact piece slot. Step 4. Insert the outer contact piece of the power terminal into the corresponding outer contact piece slot of the mounting plate by pushing it from back to front, with the second contact finger as the insertion front end, until it is inserted into place; Step 5. Install the positioning plate from the bottom to the top of the crimping part of each power terminal, and insert the installed positioning plate into the bottom of the rear side of the mounting plate; A finished electrical connector is obtained.

[0028] The above technical measures are aimed at the particularity of the assembly structure between the above-mentioned crimped printed circuit board connector and the printed circuit board, as well as the electrical connector matching the above structure. The pre-bent contact pieces form an assembly process from back to front in the assembly of the mounting plate, and the assembled contact pieces do not need to be further L-shaped bent. The technical advantage of the electrical connector with the above structure is that while meeting the technical requirements for force during crimping of the crimped electrical connector, the bending process after assembly is eliminated, which is beneficial to controlling the manufacturing cost of the electrical connector, and has low technical requirements for the design and manufacturing precision of the mounting plate, is easy to manufacture, and has high stability and high molding quality after assembly.

[0029] The beneficial technical effect of the present invention is as follows: while the above-mentioned technical measures meet the technical requirements for force during crimping of the crimp-type electrical connector, the contact pieces to be assembled in the mounting plate are pre-bent in accordance with the design requirements, eliminating the need for bending treatment after assembly, and thus eliminating the need for special equipment with specific technical requirements and high purchase costs, which is beneficial to controlling the manufacturing cost of the electrical connector; and the pre-bent contact pieces do not need to rely on the structure of the mounting plate for guided bending, and the technical requirements for the design and manufacturing accuracy of the mounting plate are relatively low, making it easy to manufacture; the pre-bent contact pieces do not experience elastic recovery deformation after assembly, and are highly stable after being assembled, and the final formed electrical connector is of high quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A structural schematic diagram of the present invention.

[0031] Figure 2 for Figure 1 Vertical section (along the front-to-back direction).

[0032] Figure 3 It is an exploded view of the present invention.

[0033] Figure 4 for Figure 1 Partial top view of the horizontal section at point A in the figure.

[0034] Figure 5 for Figure 1 Schematic diagram of the partial structure of the mounting plate at the rear end (i.e., the output end).

[0035] Figure 6 for Figure 1 , Figure 2 and Figure 4 Schematic diagram of the card strip structure.

[0036] Figure 7 It is a schematic structural diagram of the inner contact piece of the present invention before bending.

[0037] Figure 8 It is a schematic diagram of the structure of the inner contact piece of the present invention after being bent.

[0038] Meanings of the codes in the figure: 1—mounting plate; 11—upper wall plate; 12—lower wall plate; 13—partition wall; 14—outer contact piece slot; 15—inner contact piece slot; 2—inner contact piece; 21—base one; 22—contact finger part one; 23—crimping part one; 24—fixed winglet one; 3—outer contact piece; 31—base two; 32—contact finger part two; 33—crimping part two; 34—fixed winglet two; 4—clamping strip; 41—beam body; 42—wedge block; 43—give way groove; 44—clamping part; 45—limit end stop; 46—interference ridge one; 47—interference ridge two; 5—positioning plate; 51—positioning hole; 52—limiting groove. DETAILED DESCRIPTION

[0039] The present invention relates to the technical field of electrical connectors, and more particularly to a crimp-type printed circuit board connector and a molding method for the connector. The main technical solution of the present invention is specifically described below in conjunction with a plurality of embodiments. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 The technical solution of the present invention is explained clearly and in detail; although other embodiments are not separately drawn with drawings, their main structures can still refer to the drawings of embodiment 1.

[0040] It should be noted that the drawings of the present invention are schematic, and unnecessary details have been simplified to clarify the technical purpose of the present invention, so as to avoid blurring the technical solution of the present invention that contributes to the prior art. In addition, the expressions "approximately", "substantially" and the like regarding quantity or matching relationship in the following text mean that reasonable assembly errors and processing errors in the industry are allowed to exist, and do not literally express absolute quantities or matching relationships.

[0041] Example 1 See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the connector of the present invention comprises a mounting plate 1 formed of insulating material, a positioning plate 5, a clamping strip 4, and a plurality of power terminals formed of metal conductive material.

[0042] Specifically, the mounting plate 1 comprises an upper wall plate 11 and a lower wall plate 12, and a plurality of partition walls 13 (including a vertical wall plate whose end is located between the upper wall plate 11 and the lower wall plate 12) arranged at intervals along the horizontal width direction (i.e., the left-right direction relative to the input / output end) between the upper wall plate 11 and the lower wall plate 12. The partition walls 13 separate a plurality of groups of insertion slots for inserting power terminals and signal terminals between the upper wall plate 11 and the lower wall plate 12. The technical contribution of the present invention lies in the insertion slots for inserting power terminals separated by the partition walls 13, and the associated insertion structure.

[0043] In the mounting plate 1, between the adjacent left and right partition walls 13 (i.e., in the horizontal width direction) of each insertion slot for receiving the power terminal, there is a layer plate 16 that divides the insertion slot into relatively independent insertion spaces in the upper and lower parts (the aforementioned upper and lower positions are relative to the top and bottom heights of the mounting plate). In this way, between the adjacent left and right partition walls 13 of each insertion slot for receiving the power terminal, there are relatively independent outer contact sheet slots 14 and inner contact sheet slots 15 that are layered and separated in the upper and lower parts.

[0044] It should be noted that the partition wall 13 and the layer plate 14 of the mounting plate 1 are formed at the middle and rear part of the mounting plate 1 in the front-to-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 connected in the horizontal width direction so that the supporting equipment can be electrically connected with the power terminals and the signal terminals during use. The space at the rear part (i.e., the output end) of the mounting plate 1 is used for the bending arrangement of the contact pieces and the arrangement of the card strip 4 and the positioning plate 5.

[0045] Each group of power terminals is composed of an inner contact piece 2 and an outer contact piece 3.

[0046] Among them, the inner contact piece 2 has an integrally formed base body 21, a contact finger portion 22 located at the front of the base body 21 (relative to the input / output end of the mounting plate), and a crimping portion 23 located at the rear of the base body 21 (relative to the input / output end of the mounting plate). In order to adapt to the electrical connection plugging and unplugging during use, the contact finger portion 22 is an upward (relative to the top and bottom heights of the mounting plate) arc-shaped curved structure that matches the outer contact piece 3. Of course, the contact finger portion 22 can also form a fork in the horizontal width direction. In order to adapt to the crimping assembly relationship with the printed circuit board, the crimping portion 23 is provided with a vertical elliptical micro-deformation hole, similar to a "fisheye". This type of contact piece is also known as a fisheye contact piece in the industry. Of course, the fisheye structure on the same contact piece can be formed into multiple in the form of a fork. Figure 8 As shown, the inner contact sheet 2 before assembly on the mounting plate 1 is pre-bent from the middle and rear part of the base body 21 into an L-shaped bending structure. Figure 7 The straight plate structure is bent into Figure 8 In order to enable the inner contact piece 2 to be accurately and stably assembled in the corresponding inner contact piece slot 15 of the mounting plate 1, the base body 1 21 at the front side of the bending part has a fixed winglet 1 24 with a convex shape and a toothed structure on both sides of the horizontal width.

[0047] The outer contact piece 3 has an integrally formed base body 2 31, a contact finger part 2 32 located at the front of the base body 2 31, and a crimping part 2 33 located at the rear of the base body 2 31. To adapt to the electrical connection plugging and unplugging during use, the contact finger part 2 32 is a downward arc-shaped curved structure that matches the inner contact piece 2. Before being assembled on the mounting plate 1, the outer contact piece 3 is pre-bent from the middle and rear part of the base body 2 31 into an L-shaped bending structure. In order to enable the outer contact piece 3 to be accurately and stably assembled in the corresponding outer contact piece slot 14 of the mounting plate 1, the base body 2 31 at the front side of the bending part has two sides of the horizontal width, which are respectively provided with fixed small wings 2 34 with a convex shape and a tooth-shaped structure.

[0048] In view of the structural form of the outer contact piece 3 of the power terminal, the structural dimensions of the outer contact piece slot 14 in the mounting plate 1 allow the outer contact piece 3 of the corresponding power terminal to pass through from the back to the front, that is, the structural dimensions of the outer contact piece slot 14 match the three-dimensional contour structure of the contact finger portion 2 32 of the corresponding outer contact piece 3, so that the contact finger portion 2 32 of the corresponding outer contact piece 3 can be pushed forward from the rear side of the mounting plate as the insertion front end. Of course, in order to adapt to the insertion depth positioning and anti-loosening limit of the inserted outer contact piece 3, the left and right partition walls 13 on the top of the corresponding outer contact piece slot 14 have limit slots that match the fixed small wings 2 34 on the outer contact piece 3.

[0049] In view of the structural form of the inner contact piece 2 of the power terminal, the structural dimensions of the inner contact piece slot 15 in the mounting plate 1 allow the inner contact piece 2 of the corresponding power terminal to pass through from the back to the front, that is, the structural dimensions of the inner contact piece slot 15 match the three-dimensional contour structure of the contact finger part 22 of the corresponding inner contact piece 2, so that the contact finger part 22 of the corresponding inner contact piece 2 can be pushed forward from the rear side of the mounting plate as the front end of the insertion. Of course, in order to adapt to the insertion depth positioning and anti-loosening limit of the inserted inner contact piece 2, the bottom left and right side partition walls 13 of the corresponding inner contact piece slot 15 have limit slots that match the fixed small wings 24 on the inner contact piece 2.

[0050] As described above, the outer contact piece 3 of the power terminal is an L-shaped bending structure before being inserted into the mounting plate 1, and the outer contact piece 3 is inserted into the corresponding outer contact piece slot 14 of the mounting plate 1 in a manner of being pushed from the back to the front. The outer contact piece 3 inserted into the corresponding outer contact piece slot 14 is inserted and matched with the limiting slot in the corresponding outer contact piece slot 14 through the fixing small wings 2 34 on both sides of the horizontal width of the base 2 31, so as to form an embedded limit in the mounting plate 1, and is located on the outside of the inner contact piece 2 of the same power terminal.

[0051] The second contact finger portion 32 of the installed outer contact piece 3 extends forward to the front of the mounting plate 1, and the downward curved arc structure of the second contact finger portion 32 cooperates with the installed inner contact piece 2 to form an electrically connected elastic contact "gold finger". The bending part of the outer contact piece 3 is located inside the rear edge of the upper wall plate 11 of the mounting plate 1, that is, the rear edge of the upper wall plate 11 of the mounting plate 1 extends behind the bending part of the outer contact piece 3. The second crimping part 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, and is used for crimping and terminating with the printed circuit board. In order to meet the aforementioned "gold finger" matching relationship, the top side of the base body 2 31 of the outer contact piece 3 is in contact with the upper wall plate 11 at the outer contact piece slot 14. Of course, this contact requires the limit slot in the outer contact piece slot 14 to be plugged and matched with the fixed wing 2 34. The positioning plate 5 described below provides limit support, and provides limit support during the crimping with the printed circuit board, which has good stability. Since the top side of the outer contact piece 3 is in contact with the upper wall plate 11 of the mounting plate 1 to achieve the rigid support limit required by the design, the excess space of the outer contact piece slot 14 does not need to be filled and can be left empty.

[0052] As described above, the inner contact piece 2 of the power terminal is an L-shaped bending structure before being inserted into the mounting plate 1, and the inner contact piece 2 is inserted into the corresponding inner contact piece slot 15 of the mounting plate 1 in a manner of being pushed horizontally from the back to the front. The inner contact piece 2 inserted into the corresponding inner contact piece slot 15 is plugged and matched with the limiting slot in the corresponding inner contact piece slot 15 through the fixing small wings 24 on both sides of the horizontal width of the base 21, so as to form an embedded limit in the mounting plate 1, and is located on the inner side of the outer contact piece 3 of the same power terminal.

[0053] The contact finger 1 22 of the installed inner contact piece 2 extends forward to the front of the mounting plate 1, and the upward curved arc structure of the contact finger 1 22 cooperates with the installed outer contact piece 3 to form an electrically connected elastic contact "gold finger". The crimping part 1 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 and terminating with the printed circuit board. In order to satisfy the aforementioned "golden finger" matching relationship, the bottom side of the base 21 of the inner contact piece 2 is located on the lower wall plate 12 at the inner contact piece slot 15, and a preliminary limit is formed by plugging and matching the limiting slot in the inner contact piece slot 15 with the fixed wing 24. There is no direct abutment matching relationship between the top side of the inner contact piece 2 and the layer plate 16 at the inner contact piece slot 15, but a spacing matching relationship is formed. This single matching structure is relatively difficult to meet the rigid support limit of stability required by the design. Therefore, the following card strip 4 is inserted from the back to the front between the top side of the inner contact piece 2 and the layer plate 16. The following card strip 4 is used as an intermediate transition support structure to abut the inner contact piece 2 at the layer plate 16 of the mounting plate 1 to achieve the rigid support limit required by the design and improve stability. The inserted clamping strip 4 is located at the bending part of the inner contact piece 2 , and the rear edge of the clamping strip 4 extends behind the bending part of the inner contact piece 2 and is located in front of the corresponding outer contact piece 3 , matching the spacing with the corresponding outer contact piece 3 .

[0054] The clamping strip 4 is matched with multiple groups of power terminals at adjacent positions in the horizontal width direction of the mounting plate 1, for example Figure 6 This "one-to-many" clip strip 4 has a beam body 41, and a plurality of protruding wedges 42 are arranged at intervals along the horizontal width direction on the front side of the beam body 41 (relative to the front-to-back direction of the mounting plate 1), and each wedge 42 is used to be inserted between the top side of the corresponding inner contact sheet 2 and the layer plate 16, and there are recessed grooves 43 between adjacent wedges 42 that match the corresponding partition wall 13, and a protruding clamping portion 44 is provided at the middle of the rear side of the beam body 41.

[0055] When the clamping strip 4 is inserted on the rear side of the mounting plate 1, the wedge blocks 42 on the front side of the clamping strip 4 are inserted into the space reserved on the top side of the corresponding inner contact piece 2 by clamping the clamping portion 44 of the clamping strip 4. At this time, the beam body 41 of the clamping strip 4 is located above and to the rear of the bending portion of the inner contact piece 2, serving as the rear edge of the clamping strip 4.

[0056] In order to ensure the stability of the insertion of each wedge block 42 of the card strip 4 in the corresponding inner contact piece slot 15 and to form a stable abutment support for the corresponding inner contact piece 2, each wedge block 4 of the card strip 4 has a convex interference ridge 47 at the top side, which is used to form an interference insertion fit with the corresponding layer plate 16. The interference ridge 47 is preferably arranged in a plurality of strips along the horizontal width direction of the wedge block 42, so that the purpose of interference insertion fit is achieved, and the force stability after insertion is ensured to prevent warping. Each wedge block 42 of the card strip 4 has a convex interference ridge 46 at both sides of the horizontal width direction, which is used to form an interference insertion fit with both sides of the corresponding inner contact piece slot 15. The bottom side of each wedge block 42 of the card strip 4 is a planar structure, which forms a surface contact fit with the top side of the corresponding inner contact piece 2.

[0057] In order to ensure the accuracy of the insertion of the clip strip 4 from the back to the front at the rear side of the mounting plate 1, the two ends of the beam body 41 of the clip strip 4 are provided with limit end stops 45 extending from the outside of the wedge block 42 at the corresponding edge. Correspondingly, the rear side of the mounting plate 1 has a limit stop for abutting the inserted clip strip 4. When the clip strip 4 is inserted and installed at the rear side of the mounting plate 1, the limit end stops 45 at both ends of the clip strip 4 abut against the limit stop at the rear side of the mounting plate 1.

[0058] The positioning plate 5 is inserted and installed at the bottom of the rear side of the mounting plate 1 by pushing and inserting from bottom to top, and the positioning plate 5 connected in place is located at the bottom side of the clamping strip 4. The positioning plate 5 is used to straighten the contact pieces of each power terminal and the signal terminal, so the positioning plate 5 is provided with positioning holes 51 corresponding to the outer contact pieces 3 of each group of power terminals in the height direction, and a limiting groove 52 corresponding to the inner contact pieces 2 of each group of power terminals is formed inwardly at the front edge, and the same is true for each signal terminal. The outer contact pieces 3 of each group of power terminals installed in the mounting plate 1, the corresponding crimping parts 2 33 pass through the corresponding positioning holes 51 on the positioning plate 5 and extend downward; at the same time, since the positioning plate 5 connected in place at 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, then the corresponding crimping parts 1 23 of each inner contact piece 2 installed in the mounting plate 1 pass through the limiting groove 52 at the front edge of the positioning plate 5.

[0059] The molding method of the electrical connector of the above structure includes the following process steps: Step 1. Separately manufacture and obtain the mounting plate, positioning plate, clamping strip and corresponding number of power terminals that meet the design requirements; The inner contact piece and the outer contact piece of each group of power terminals are L-shaped bending structures respectively; Step 2. Insert the inner contact piece of the power terminal into the corresponding inner contact piece slot of the mounting plate by pushing it horizontally (without tilting or making way for it when inserting) from the back to the front (relative to the front and back of the mounting plate) with the contact finger 1 as the insertion front end until it is inserted into place; Step 3. Insert the card strip wedge block at the top side of the corresponding inner contact piece by pushing it from the back to the front. The inserted card strip will clamp and fix the corresponding inner contact piece in the corresponding inner contact piece slot; Step 4. Insert the outer contact piece of the power terminal into the corresponding outer contact piece slot of the mounting plate by pushing it from back to front, with the second contact finger as the insertion front end, until it is inserted into place; Step 5. Install the positioning plate from the crimping part of each power terminal from bottom to top (relative to the height direction of the mounting plate) so that the installed positioning plate is inserted into the rear bottom of the mounting plate; A finished electrical connector is obtained.

[0060] Example 2 The other contents of this embodiment are the same as those of Embodiment 1, except that: The card strip only corresponds to a single inner contact piece insertion position on the mounting plate, that is, one card strip is inserted into one inner contact piece slot, and the card strips inserted into adjacent inner contact piece slots are independent of each other.

[0061] This embodiment is equivalent to canceling the beam body of the clamping strip, and the front side of the clamping strip is a wedge block, and the rear side is a clamping portion.

[0062] Example 3 The other contents of this embodiment are the same as those of Embodiment 1, except that: The clamping part on the rear side of the clamping strip is eliminated, and the beam body itself is used as the clamping part.

[0063] Example 4 The other contents of this embodiment are the same as those of Embodiment 1, except that: The outer convex structure of the fixed small wing 1 on the inner contact piece is enlarged and formed, and the fixed small wing 1 is plugged into the corresponding inner contact piece slot to form a constraint limit, eliminating the wedge-tightening structure of the card strip.

[0064] The above embodiments are only used to illustrate the present invention, but not to limit it.

[0065] Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the above embodiments or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not deviate the essence of the corresponding technical solutions from the spirit and scope of the present invention.

Claims

1. A crimp-type printed circuit board connector, comprising a mounting plate (1) and a plurality of groups of power terminals; Each group of power terminals has relatively independent inner contact pieces (2) and outer contact pieces (3); The mounting plate (1) is provided with contact slots for receiving groups of power terminals, and the same group of contact slots is divided into relatively independent outer contact slots (14) and inner contact slots (15) at the upper and lower sides by a layer plate (16); Features: The structural dimensions of the outer contact sheet slot (14) allow the outer contact sheet (3) of the corresponding power terminal to pass through from the back to the front; The structural dimensions of the inner contact sheet slot (15) allow the inner contact sheet (2) of the corresponding power terminal to pass through from the back to the front; The outer contact piece (3) of the power terminal is an L-shaped bent structure before installation, and the outer contact piece (3) installed in place in the corresponding outer contact piece slot (14) is limited; The inner contact piece (2) of the power terminal is an L-shaped bent structure before installation, and the inner contact piece (2) installed in place in the corresponding inner contact piece slot (15) is limited.

2. The crimp-type printed circuit board connector according to claim 1, characterized in that: When the outer contact piece (3) is inserted into the corresponding outer contact piece slot (14) and in place, the top side of the outer contact piece (3) abuts against the upper wall plate (11) at the outer contact piece slot (14).

3. The crimp-type printed circuit board connector according to claim 1, characterized in that: When the inner contact piece (2) is inserted into the corresponding inner contact piece slot (15), a spacing fit is formed between the top side of the inner contact piece (2) and the layer plate (16) at the inner contact piece slot (15); Furthermore, a clip (4) abutting against the inner contact piece (2) is filled in the matching space between the top side of the inner contact piece (2) and the corresponding layer plate (16).

4. The crimp-type printed circuit board connector according to claim 3, characterized in that: The clamping strip (4) is inserted into the matching space between the top side of the inner contact piece (2) and the corresponding layer plate (16) at the bending part of the inner contact piece (2), and the rear edge of the clamping strip (4) extends behind the bending part of the inner contact piece (2).

5. The crimp-type printed circuit board connector according to claim 4, characterized in that: The rear edge of the clamping strip (4) is located at the front side of the corresponding outer contact piece (3) and is spaced in a manner matching the corresponding outer contact piece (3); The bent portion of the outer contact piece (3) is located in front of the rear edge of the upper wall plate (11) of the mounting plate (1).

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

7. The crimp-type printed circuit board connector according to claim 6, characterized in that: The clamping strip (4) cooperates with multiple groups of power terminals at adjacent positions in the horizontal width direction of the mounting plate (1); The clamping strip (4) has a beam body (41), and a plurality of protruding wedge blocks (42) are arranged at intervals along the horizontal width direction on the front side of the beam body (41), each wedge block (42) is used to be inserted between the top side of the corresponding inner contact sheet (2) and the layer plate (16), and there is a recessed structure (43) between adjacent wedge blocks (42) that matches the corresponding partition wall (13); When the clamping strip (4) is inserted into the corresponding inner contact sheet slot (15) through the wedge blocks (42), the beam body (41) of the clamping strip (4) is located above and behind the bent portion of the inner contact sheet (2).

8. The crimp-type printed circuit board connector according to claim 7, characterized in that: The rear side of the beam body (41) of the clamping strip (4) is provided with a protruding clamping portion (44).

9. The crimp-type printed circuit board connector according to claim 7 or 8, characterized in that: At both ends of the beam body (41) of the clamping strip (4), there are limit end stops (45) extending from the outside of the wedge blocks (42) at the corresponding edges; Correspondingly, the rear side of the mounting plate (1) has a limit stop for abutting against the clamping strip (4) that is inserted into place; When the clamping strip (4) is inserted into place on the rear side of the mounting plate (1), the limit end stops (45) at both ends of the clamping strip (4) abut against the limit stoppers on the rear side of the mounting plate (1).

10. The crimp-type printed circuit board connector according to claim 1, characterized in that: The inner contact piece (2) comprises a base body (21), a contact finger portion (22) located in front of the base body (21), and a crimping portion (23) located in the rear of the base body (21); the contact finger portion (22) is an upward arc-shaped curved structure; and the base body (21) has convex fixed small wings (24) on both sides of its transverse width. Correspondingly, the corresponding inner contact piece slot (15) of the mounting plate (1) has a limiting structure for constraining the fixed small wing (24), and the inner contact piece (2) inserted into the corresponding inner contact piece slot (15) is locked and limited with the mounting plate (1) through the fixed small wing (24) on both sides of the horizontal width of the base (21); The outer contact piece (3) comprises a base body (31), a contact finger portion (32) located in front of the base body (31), and a crimping portion (33) located in the rear of the base body (31); the contact finger portion (32) is a downward arc-shaped curved structure; and the base body (31) has two fixed small wings (34) formed outwardly on both sides of its transverse width. Correspondingly, the corresponding outer contact slot (14) of the mounting plate (1) has a limiting structure for constraining the second fixed wing (34), and the outer contact piece (3) inserted into the corresponding outer contact slot (14) is limited by the second fixed wing (34) on both sides of the horizontal width of the second base (31) and the mounting plate (1).

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

12. A method for forming a crimp-type printed circuit board connector according to any one of claims 1 to 11, characterized in that: The molding method comprises the following process steps: Step 1. Obtain the mounting plate, positioning plate, clamping strip and corresponding number of power terminals that meet the design requirements; The inner contact piece and the outer contact piece of each group of power terminals are L-shaped bending structures respectively; Step 2. Insert the inner contact piece of the power terminal into the corresponding inner contact piece slot of the mounting plate by pushing it from back to front, with the contact finger 1 as the insertion front end, until it is inserted into place; Step 3. Insert the card strip into the top side of the corresponding inner contact piece by pushing it forward from the back. The inserted card strip will clamp and fix the corresponding inner contact piece in the corresponding inner contact piece slot. Step 4. Insert the outer contact piece of the power terminal into the corresponding outer contact piece slot of the mounting plate by pushing it from back to front, with the second contact finger as the insertion front end, until it is inserted into place; Step 5. Install the positioning plate from the bottom to the top of the crimping part of each power terminal, and insert the installed positioning plate into the bottom of the rear side of the mounting plate; A finished electrical connector is obtained.

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