PIN connector and manufacturing method thereof
By designing the positioning holes and protruding edge structure of the core holder and terminal assembly, the problems of skewing and plating scratches in the injection molding process of PIN connectors were solved, achieving stable connection and high-quality processing between the terminal and the core body.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-11
- Publication Date
- 2026-04-03
AI Technical Summary
Existing automotive pin connectors are prone to problems such as misalignment, deformation, and scratches on the plating when the terminals are placed in the mold during injection molding, resulting in unstable connections.
A PIN connector is designed, including a core body and a terminal assembly. The terminal assembly is inserted into the core body through a receiving groove. The terminal is bent in shape. The core seat has a positioning hole and a raised edge design. A firm connection is formed by injection molding, which avoids terminal misalignment and plating scratches.
It improves the connection strength between the terminal and the core body, prevents loosening, ensures processing quality, and improves shrinkage and sticking phenomena during injection molding.
Smart Images
Figure CN121790804A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of connector product technology, and in particular to a PIN connector and a method for manufacturing it. Background Technology
[0002] In related technologies, automotive connectors are devices used in automotive electronic systems to detachably connect two circuit conductors. They establish a reliable, safe, and detachable electrical signal and power transmission channel between core electrical components (such as ECUs, sensors, and actuators) and wiring harnesses, or between wiring harnesses themselves. Simply put, they are "standardized bridges and junctions" in the complex circuit network of a car, ensuring that electrical energy and signals can flow efficiently and stably between different components. Automotive connectors are high-tech components integrating electrical engineering, materials science, mechanical structure, and environmental engineering. They are fundamental and crucial to ensuring the realization of all functions in modern automobiles, especially electrified and intelligent vehicles. Without high-performance connectors, today's highly complex and reliable automotive electronic systems would not exist.
[0003] However, existing automotive pin connectors are prone to problems such as misalignment, deformation, and scratches on the plating when the terminals are placed in the mold and the outer plastic core body is injected, resulting in a variety of defects. Summary of the Invention
[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a PIN connector that can improve the connection strength between the terminal and the core body, while also having high processing quality.
[0005] This application also proposes a manufacturing method for processing the aforementioned PIN connector.
[0006] According to a first aspect of the present invention, a PIN connector includes: a core body and a terminal assembly. The core body is provided with a receiving groove. The terminal assembly includes a terminal group and a core holder. The terminal assembly is inserted into the core body through the receiving groove. The terminal group includes a plurality of terminals. The terminals are bent and include a first straight portion, a second straight portion, and a bent portion. The bent portion connects the first straight portion and the second straight portion. The first straight portion and the second straight portion are perpendicular to each other. The core holder is provided with a plurality of positioning holes for fixing the terminals. The positioning holes penetrate the front and rear of the core holder. The upper wall of the core holder extends forward and backward to form an upper protrusion protruding from the positioning hole, and the lower wall of the core holder extends forward and backward to form a lower protrusion protruding from the positioning hole, respectively.
[0007] According to the first aspect of the present invention, the PIN connector has at least the following advantages: The PIN connector includes a terminal assembly and a core body encased within the terminal assembly. The terminal assembly passes through a receiving groove in the core body and includes a terminal group and a core seat. Multiple terminals of the terminal group are respectively fixed to multiple positioning holes in the core seat, thereby positioning and fixing the terminal group through the core seat. The core body is then injection molded together with the terminal group and the core seat, thus avoiding misalignment and scratches to the plating during terminal placement. The positioning holes extend through the front and rear of the core seat, and an upper and lower protrusion are formed at the front end of the positioning hole, as well as at the rear end. This structural design allows the core seat to be more firmly positioned inside the core body after injection molding, improving connection strength and preventing loosening. Therefore, the PIN connector of this application can improve the connection strength between the terminals and the core body while also having high processing quality.
[0008] According to some embodiments of the present invention, a plurality of material removal holes are respectively provided on the upper and lower end faces of the core body, the material removal holes avoid the receiving groove and penetrate the upper or lower end face of the core body.
[0009] According to some embodiments of the present invention, the core holder is provided with at least two sets, and is respectively sleeved on the terminal along the length direction of the terminal.
[0010] According to some embodiments of the present invention, the core holder and the terminal are interference-fitted.
[0011] According to some embodiments of the present invention, the bent portion is located inside the core body.
[0012] According to some embodiments of the present invention, the bent portion is arc-shaped.
[0013] According to some embodiments of the present invention, the core holder includes a plurality of core units connected in sequence, and the core units are arranged in a one-to-one correspondence with the terminals.
[0014] According to some embodiments of the present invention, the port of the positioning hole is provided with a guide surface for connecting the end face of the core seat and the inner side surface. The guide surface is inclined from the outside to the inside to facilitate the insertion of the terminal.
[0015] The manufacturing process of the PIN connector according to a second aspect embodiment of the present invention includes the following steps: The terminals are stamped into a bent shape; The terminal surface is electroplated. Processing and injection molding strip-shaped rubber core material, the rubber core material having several positioning holes; The required length of the rubber core material is cut to obtain the rubber core seat; The terminals are respectively inserted into the positioning holes of the core holder to form a terminal assembly; The terminal assembly is injection molded to form a core body covering the middle of the terminal assembly; wherein the upper and lower end faces of the injection-molded core body are respectively formed with the material removal holes, and the material removal holes avoid the terminals.
[0016] According to the second aspect of the present invention, the manufacturing process of the PIN connector has at least the following advantages: the manufacturing method of this PIN connector is to first stamp the terminals, and then electro-machine the surface of the stamped and bent terminals to form a plating layer; then injection mold a long strip of rubber core material, cut the required length of the rubber core material to obtain a rubber core seat, the rubber core seat having multiple positioning holes; insert the terminals one by one into the positioning holes of the rubber core seat to achieve positioning and fixation, forming a terminal assembly, and finally injection mold the terminal assembly. The terminal assembly, which is finally wrapped in the rubber core body, is neatly arranged with a good outer surface plating, avoiding the occurrence of terminal skewing. At the same time, the upper and lower end faces of the rubber core body have material removal holes, which improves the shrinkage and sticking phenomena during the injection molding process. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the overall structure of one embodiment of the PIN connector of the present invention; Figure 2 for Figure 1 The diagram shown is a structural schematic of the PIN connector after the core body has been removed. Figure 3 for Figure 1 The diagram shows the structure of the core holder in the PIN connector.
[0018] Figure label: The core body 100; receiving groove 110; material removal hole 120; terminal assembly 200; terminal group 210; terminal 211; first straight part 2111; second straight part 2112; bending part 2113; core seat 220; core unit 221; positioning hole 222; upper protrusion 223; lower protrusion 224; guide surface 225. Detailed Implementation
[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0020] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0021] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0022] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.
[0023] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0024] The following is for reference. Figures 1 to 3 This invention describes a PIN connector and a method for manufacturing it, according to an embodiment of the present invention.
[0025] like Figures 1 to 2As shown, the PIN connector according to an embodiment of the present invention includes: a core body 100 and a terminal assembly 200. The core body 100 is provided with a receiving groove 110; the terminal assembly 200 includes a terminal group 210 and a core holder 220. The terminal assembly 200 is inserted into the core body 100 through the receiving groove 110. The terminal group 210 includes a plurality of terminals 211. The terminals 211 are bent and include a first straight portion 2111, a second straight portion 2112, and a bent portion 2113. Part 2113 connects the first straight part 2111 and the second straight part 2112. The first straight part 2111 and the second straight part 2112 are perpendicular to each other. The core holder 220 is provided with a plurality of positioning holes 222 for fixing the terminal 211. The positioning holes 222 penetrate the front and rear of the core holder 220. The upper wall of the core holder 220 extends forward and backward to form an upper protruding edge 223 protruding from the positioning hole 222, and the lower wall of the core holder 220 extends forward and backward to form a lower protruding edge 224 protruding from the positioning hole 222.
[0026] Understandably, this PIN connector includes a terminal assembly 200 and a core body 100 encased within the terminal assembly 200. The terminal assembly 200 passes through the receiving groove 110 of the core body 100 and includes a terminal group 210 and a core holder 220. Multiple terminals 211 of the terminal group 210 are respectively fixed to multiple positioning holes 222 of the core holder 220, thereby positioning and fixing the terminal group 210 through the core holder 220. Then, the core body 100 is injection molded together with the terminal group 210 and the core holder 220, thus avoiding the need for misalignment during the placement of the terminals 211. The plating may be misaligned or scratched due to impacts. The positioning hole 222 extends through the front and rear of the core seat 220, and an upper protrusion 223 and a lower protrusion 224 are formed at the front end of the positioning hole 222 in the core seat 220. The upper protrusion 223 and the lower protrusion 224 are also formed at the rear end of the positioning hole 222. This structural design allows the core seat 220 to be more firmly located inside the core body 100 after injection molding, improving the connection strength and preventing loosening. Therefore, the PIN connector of this application can improve the connection strength between the terminal and the core body, while also having high processing quality.
[0027] It is understood that the upper and lower end faces of the core body 100 are respectively provided with a plurality of material removal holes 120, the material removal holes 120 avoiding the receiving groove 110, and penetrating the upper or lower end face of the core body 100. For example, as Figure 1As shown, in this embodiment, by providing material removal holes 120 that avoid the receiving groove 110 on the upper and lower end faces of the core body 100, the temperature difference between the material near the geometric center of the core body 100 and the outer surface of the core body 100 can be reduced during the thermal expansion and contraction process after injection molding, thereby improving the shrinkage of the core body 100 after injection molding and also improving the sticking to the mold.
[0028] It is understood that the adhesive core holder 220 is provided with at least two sets, and each set is sleeved on the terminal 211 along the length direction of the terminal 211. For example, as Figures 1 to 2 As shown, in this embodiment, by providing at least two sets of adhesive core holders 220 along the length of the terminal 211, the terminal 211 is better positioned and fixed, thus improving the situation of terminal 211 displacement. In other embodiments, more than two adhesive core holders 220 may be provided.
[0029] It is understandable that the core holder 220 and the terminal 211 are interference-fitted. For example, as Figure 2 As shown, in this embodiment, the core holder 220 and the terminal 211 are interference-fitted, thereby achieving the positioning and fixation of the core holder 220 and the terminal 211. In other embodiments, other positioning methods can be used to fix the terminal 211, such as anti-slip textures.
[0030] It is understandable that the bending portion 2113 is located inside the core body 100. For example, as... Figures 1 to 2 As shown, in this embodiment, the terminal 211 is positioned and further fixed by injection molding the bent portion 2113 into the interior of the core body 100.
[0031] It is understandable that the bend 2113 is arc-shaped. For example, as... Figures 1 to 2 As shown, in this embodiment, the arc-shaped bend 2113 can provide stress relief and protect the root of the terminal 211.
[0032] It is understood that the adhesive core holder 220 includes a plurality of adhesive core units 221 connected in sequence, and the adhesive core units 221 are arranged in a one-to-one correspondence with the terminals 211. For example, as Figures 2 to 3 As shown, in this embodiment, the glue core holder 220 includes a plurality of interconnected glue core units 221. The glue core units 221 connected one by one can respectively position a single terminal 211, and the structure of the plurality of interconnected glue core units 221 allows the raw material of the glue core holder 220 to be easily cut into the required number of glue core units 221 as needed.
[0033] It is understood that the port of the positioning hole 222 is provided with a guide surface 225 connecting the end face and inner side of the adhesive core seat 220. The guide surface 225 is inclined from the outside to the inside to facilitate the insertion of the terminal 211. For example, as Figures 2 to 3 As shown, in this embodiment, a guide surface 225 is provided at the port of the positioning hole 222 to connect the end face and the inner side of the glue core seat 220, thereby facilitating the insertion of the terminal 211.
[0034] A method for manufacturing a PIN connector according to a second aspect embodiment of the present invention includes the following steps: The terminals are stamped into a bent shape; Electroplating is performed on the terminal surface; Process and injection mold strip-shaped rubber core material, the rubber core material has several positioning holes; Cut the rubber core material to the required length to obtain the rubber core seat; The terminals are inserted into the positioning holes of the core holder to form a terminal assembly; The terminal assembly is injection molded to form a core body covering the middle of the terminal assembly; wherein, the upper and lower end faces of the injection-molded core body are respectively formed with material removal holes, which avoid the terminals.
[0035] Understandably, the manufacturing method of this PIN connector involves first stamping the terminals, then electrically machining the surface of the stamped and bent terminals to create a plating layer; next, injection molding a long strip of core material, cutting it to the required length to obtain a core holder, which has multiple positioning holes; inserting the terminals one by one into the positioning holes of the core holder for positioning and fixing, forming a terminal assembly; finally, injection molding the terminal assembly, resulting in a neatly arranged terminal assembly encased in the core body with a complete outer plating layer, avoiding terminal misalignment; and the core body has ejector holes on both the upper and lower ends, improving shrinkage and mold sticking during injection molding.
[0036] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.
Claims
1. A PIN connector, characterized in that, include: The core body is equipped with a receiving groove; A terminal assembly includes a terminal group and a core holder. The terminal assembly is inserted into the core body through the receiving groove. The terminal group includes multiple terminals, each terminal being bent. Each terminal includes a first straight portion, a second straight portion, and a bent portion. The bent portion connects the first straight portion and the second straight portion, which are perpendicular to each other. The core holder has multiple positioning holes for fixing the terminals. The positioning holes extend through the front and rear of the core holder. The upper wall of the core holder extends forward and backward to form upper protrusions protruding from the positioning holes, and the lower wall of the core holder extends forward and backward to form lower protrusions protruding from the positioning holes.
2. The PIN connector according to claim 1, characterized in that, The upper and lower end faces of the core body are respectively provided with a plurality of material removal holes, which avoid the receiving groove and penetrate the upper or lower end face of the core body.
3. The PIN connector according to claim 2, characterized in that, The core holder is provided in at least two sets, and is respectively sleeved on the terminal along the length direction of the terminal.
4. The PIN connector according to claim 2, characterized in that, The core holder is interference-fitted with the terminal.
5. The PIN connector according to claim 1, characterized in that, The bent portion is arc-shaped and located inside the core body.
6. The PIN connector according to claim 1, characterized in that, The core holder includes a plurality of core units connected in sequence, and each core unit is configured to correspond one-to-one with a terminal.
7. The PIN connector according to claim 1, characterized in that, The positioning hole has a guide surface at its port that connects the end face and inner side of the core seat. The guide surface is inclined from the outside to the inside to facilitate the insertion of the terminal.
8. A method for manufacturing a PIN connector, characterized in that, Includes the following steps: The terminals are stamped into a bent shape; The terminal surface is electroplated. Processing and injection molding strip-shaped rubber core material, the rubber core material having several positioning holes; The required length of the rubber core material is cut to obtain the rubber core seat; The terminals are respectively inserted into the positioning holes of the core holder to form a terminal assembly; The terminal assembly is injection molded to form a core body covering the middle of the terminal assembly; wherein the upper and lower end faces of the injection-molded core body are respectively formed with the material removal holes, and the material removal holes avoid the terminals.