A printed board connector

Abstract

The application discloses a printed board connector and relates to the technical field of electric connectors. The connector comprises a shell, a contact piece, a tail screw cap, a printed board, a grounding wire, a grounding screw, a pouring layer and a plugging body. The rear end of the shell has an inner cavity, and a lateral groove extending to the rear end face in the axial direction is formed in the side wall of the shell. One part of the printed board is electrically connected with the contact piece, and the other part is led out of the shell through the lateral groove. The grounding wire is connected with the grounding layer of the printed board and is connected with the grounding screw after passing through the wire hole on the partition plate of the tail screw cap, and the grounding screw is screwed into the threaded hole of the partition plate. The rear end pouring cavity of the tail screw cap is provided with the pouring layer, and the lateral groove is provided with the plugging body. The printed board is led out through the lateral groove to replace the traditional wire harness, and the tail space and weight are greatly reduced. The low-impedance grounding path is formed by the grounding wire, the grounding screw, the tail screw cap and the shell, and reliable shielding grounding is achieved.

Description

Technical Field

[0001] This invention relates to the field of electrical connector technology, and more specifically, to a printed circuit board connector suitable for confined spaces and having a shielded grounding function. Background Technology

[0002] In modern industry, commercial aviation, aerospace, and marine fields, reliable connections between electrical equipment are crucial. Electrical connectors, as key interfaces for signal and power transmission within a system, directly impact the stability and reliability of the entire system. With technological advancements and the increasing integration and modularization of equipment, there is a pressing need for connectors that are miniaturized, lightweight, high-density, quick-connect / disconnect, and highly environmentally adaptable (e.g., waterproof and dustproof).

[0003] Traditional waterproof connectors, such as the widely used J599 series and JY599 series, are technically mature and highly reliable, but their structural design often results in a large size and weight, making it difficult to meet the needs of modern drones, portable devices, underwater equipment, and other low-altitude economic and high-end equipment fields that are extremely sensitive to space and weight.

[0004] To address the aforementioned issues, several improved connector structures have emerged in the prior art, such as patents CN202512004601.0, CN202411849467.3, and CN201620968825.7. However, these solutions still have the following shortcomings: First, the connector (plug) tail typically uses crimping or soldering processes to lead out the wires, which, together with the tail accessories, achieve wire harness clamping and increased shielding. This traditional wire harness connection method results in a large overall weight and space occupation, making it unsuitable for special occasions where the chassis or backplane has densely packed contacts and limited space. Second, when the plug connector is used as a free end, simultaneously achieving enhanced shielding and grounding functions presents technical challenges. Existing structures often have poor shielding effects or unreliable grounding continuity. Third, under conditions of extremely limited installation space and stringent environmental requirements (such as the installation space requirements of a certain model), traditional connectors cannot simultaneously meet the comprehensive requirements of lightweight design, shielding effectiveness, and grounding function.

[0005] Therefore, there is an urgent need for an innovative connector design that can achieve miniaturization and lightweight design while comprehensively solving technical challenges such as use in confined spaces, improved shielding effect, and reliable grounding function. Summary of the Invention

[0006] This invention addresses the shortcomings of existing technologies by providing an improved printed circuit board connector designed to meet the requirements of use in confined spaces and lightweight design, while also achieving enhanced shielding and grounding functions.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0008] A printed circuit board connector, comprising:

[0009] The housing has an inner cavity at its rear end, and a lateral groove is formed on the side wall of the housing. The lateral groove extends axially to the rear end face of the housing and connects the inner cavity with the outside of the housing.

[0010] The contact element is located inside the housing along the axial direction of the housing.

[0011] The tail nut has an opening at its rear end and an internal partition. The partition has a threaded hole and a wire passage hole. The tail nut is fixedly connected to the rear end of the housing.

[0012] A printed circuit board, one part of which is electrically connected to the contact element, and the other part is led out from the inner cavity to the outside of the housing via the lateral groove;

[0013] A grounding wire, one end of which is electrically connected to the grounding layer of the printed circuit board, and the other end of which passes through a wire hole on the partition;

[0014] A grounding screw is connected to the other end of the grounding wire and screwed into a threaded hole in the partition plate;

[0015] A potting layer is provided in the potting cavity at the rear end of the tail nut to fix and seal the grounding screw and the grounding wire;

[0016] A sealing body is disposed at the lateral groove and is used to seal the lateral groove.

[0017] The beneficial effects are as follows: By creating a lateral groove extending axially to the rear end face on the side wall of the housing, this invention allows the printed circuit board (PCB) to be inserted axially from the rear, enabling it to be led out from the inner cavity of the housing to the outside. This eliminates the need for traditional crimping or soldering of wire harnesses at the tail, significantly reducing the space occupied and overall weight of the connector tail, thus meeting the requirements of limited space and lightweight design. Simultaneously, by incorporating a tail nut, grounding wire, grounding screw, and potting layer, a reliable electrical continuity path is formed from the PCB grounding layer to the tail nut, achieving shielded grounding functionality. The potting layer seals the rear end of the tail nut, and the sealing body seals the lateral groove; together, they ensure the connector's sealing performance and prevent external impurities from entering.

[0018] Furthermore, the contact is a printed circuit board pin, and the printed circuit board and the contact are connected by soldering.

[0019] The beneficial effects are: limiting the contact to printed circuit board pins and connecting it to the printed circuit board by soldering ensures the reliability of signal transmission and electrical continuity. The soldered connection has the advantages of low resistance and high stability.

[0020] Furthermore, the tail nut is connected to the rear end of the housing via a thread.

[0021] The beneficial effects are: the tail nut is connected to the rear end of the housing by a thread, which makes assembly simple, connection reliable, and easy to disassemble and maintain. At the same time, the threaded connection can provide sufficient axial clamping force to ensure the sealing effect.

[0022] Furthermore, the sealing body is formed in the lateral groove by heat shrinking, vulcanization or injection molding.

[0023] The beneficial effects are as follows: the sealing body is formed in the side groove by heat shrinking, vulcanization or injection molding. These molding processes are mature and reliable, and can form a sealing layer that is tightly bonded to the shell, effectively preventing water vapor, dust and other substances from entering the inner cavity of the shell from the side groove. At the same time, the process is simple and low in cost.

[0024] Furthermore, the sealing body fills and seals the entire rear end cavity, including the lateral groove and the tail nut.

[0025] The beneficial effects are as follows: the sealing body not only blocks the lateral groove, but also further fills and seals the entire rear end cavity of the tail nut, forming an integral sealing structure. This design eliminates the seams between the lateral groove and the tail nut, and between the tail nut and the rear end of the housing, significantly improving sealing performance while enhancing shielding effect and anti-interference capability.

[0026] Furthermore, the lateral groove is a rectangular groove or an oblong groove.

[0027] The beneficial effects are: the side slots are designed as rectangular or waist-shaped slots, which facilitates processing and manufacturing, and can adapt to the lead-out requirements of printed circuit boards of different shapes and sizes. The structure is simple and highly practical.

[0028] Furthermore, the grounding wire is connected to the grounding layer of the printed circuit board by welding.

[0029] The beneficial effects are as follows: the grounding conductor is connected to the grounding layer of the printed circuit board by welding. The welding connection has the advantages of low impedance, high mechanical strength and vibration resistance, which ensures the long-term reliable conduction of the grounding path.

[0030] Furthermore, the potting layer covers the head of the grounding screw.

[0031] The beneficial effects are: the potting layer covers the head of the grounding screw, completely encapsulating the grounding screw in the potting material, preventing the grounding screw from loosening due to vibration, and avoiding the adhesion of foreign matter (such as metal shavings and dust) to the grounding screw, which could lead to grounding failure, thus improving the safety and reliability of the product.

[0032] Furthermore, the inner wall of the filling cavity is provided with several annular grooves.

[0033] The beneficial effects are as follows: Several annular grooves are set on the inner wall of the potting cavity, which increases the contact area and bonding force between the potting layer and the inner wall of the shell, preventing the potting layer from peeling or cracking during long-term use or temperature changes, and further improving the sealing durability.

[0034] Furthermore, the printed circuit board is a rigid printed circuit board or a rigid-flex printed circuit board.

[0035] Specifically, when the printed circuit board is a rigid-flex printed circuit board, it includes a first rigid region, a second rigid region, and a flexible connecting portion connecting the first rigid region and the second rigid region, wherein the first rigid region is located inside the housing, the second rigid region is located outside the housing, and the flexible connecting portion extends to the outside of the housing via a lateral groove.

[0036] The beneficial effects are as follows: by adopting a rigid-flexible printed circuit board and utilizing the bendable characteristics of the flexible connection part, the spatial position and orientation of the second rigid zone can be flexibly adjusted, so that the outgoing direction of the connector rear end is no longer limited by the axial direction of the housing, which can adapt to various complex installation and connection scenarios, further improving the environmental adaptability and installation convenience of the product.

[0037] Furthermore, it also includes a spring washer and a flat washer, both of which are inserted through the grounding screw and located between the grounding screw and the partition.

[0038] The beneficial effects are as follows: A spring washer and a flat washer are placed between the grounding screw and the partition. The spring washer provides an anti-loosening function, preventing the grounding screw from loosening due to vibration; the flat washer increases the contact area, protects the partition surface, and improves the stability of the conductive contact. Together, they ensure the long-term reliability of the grounding connection.

[0039] Furthermore, it also includes an insulator, an interface seal, and a sealing wire disposed in the inner cavity of the housing. The contact is disposed in the insulator, and the interface seal and the sealing wire are respectively disposed at the front and rear ends of the insulator, with the contact passing through the interface seal and the sealing wire.

[0040] The beneficial effects are as follows: by setting insulators, interface seals and wire seals in the inner cavity of the housing, and by having the contact pass through the above components, reliable positioning of the contact, insulation isolation and sealing of the connector mating interface and tail are achieved, thereby improving the environmental adaptability of the connector.

[0041] Furthermore, the housing is a hollow stepped shaft with multiple limiting structures on its inner wall, including a first step for axially limiting the interface sealing body, a second step for axially limiting the insulator, and a groove for axially limiting the sealing body.

[0042] The beneficial effects are as follows: by setting the housing as a hollow stepped shaft and setting multiple limiting structures (first step, second step, groove) on the inner wall, the interface sealing body, the insulator and the sealing wire body are axially limited respectively, which ensures the precise position of each component after assembly, prevents axial movement during use, and improves the structural stability and reliability of the connector.

[0043] In summary, this invention comprehensively solves technical problems such as use in confined spaces, lightweight design, enhanced shielding, and reliable grounding through a series of technical means, including lateral slots leading out the printed circuit board, tail nuts working in conjunction with grounding screws to achieve electrical continuity, and a multi-layered sealing structure. It has made significant technological progress.

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is an overall schematic diagram of the connector in this invention (excluding the printed circuit board).

[0047] Figure 2 yes Figure 1 The front view.

[0048] Figure 3 yes Figure 2 The right view.

[0049] Figure 4 This is an exploded view of the connector in this invention.

[0050] Figure 5 This is one of the cross-sectional views of the connector in this invention (including a rigid printed circuit board).

[0051] Figure 6 This is one of the cross-sectional views of the connector in this invention (including a rigid-flex printed circuit board).

[0052] Figure 7 This is one of the cross-sectional views of the connector in this invention.

[0053] The diagram shows the following markings: 1. Connecting nut; 2. Housing; 201. Side groove; 202. First step; 203. Second step; 204. Groove; 3. Tail nut; 301. Partition; 302. Wire hole; 303. Threaded hole; 304. Encapsulation cavity; 3041. Annular groove; 4. Grounding screw; 5. Contact element; 6. Interface seal; 7. Insulator; 8. Sealing body; 9. Flat washer; 10. Spring washer; 11. Printed circuit board; 111. Second rigid zone; 112. Flexible connection; 113. First rigid zone; 12. Sealing body; 13. Grounding wire; 14. Encapsulation layer. Detailed Implementation

[0054] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0055] In the description of this invention, it should be understood that the terms "upper" and "lower" 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 invention 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 limiting the scope of protection of this invention.

[0056] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0057] like Figures 1 to 7 As shown, this embodiment provides a printed circuit board connector, which is particularly suitable for applications requiring confined spaces, high-density contact arrangement, and the need to balance lightweight design with shielding and grounding functions. The printed circuit board connector mainly includes a connecting nut 1, a housing 2, a tail nut 3, a grounding screw 4, a contact 5, an interface seal 6, an insulator 7, a wire seal 8, a spring washer 10, a flat washer 9, a printed circuit board 11, a sealing body 12, a grounding wire 13, and a potting layer 14.

[0058] The housing 2 serves as the main support component of the connector, with an axially arranged cavity inside to accommodate various functional components. A connecting nut 1 is rotatably fitted onto the front outer periphery of the housing 2 for quick insertion and locking with the mating connector. A tail nut 3 is fixedly connected to the rear end of the housing 2 for tail sealing and grounding connection. A printed circuit board 11 is partially located within the cavity of the housing 2 and partially extended to the outside, enabling signal transmission and grounding functions.

[0059] like Figure 4 and Figure 5 As shown, the rear end of the housing 2 has an inner cavity for accommodating the printed circuit board 11. A lateral groove 201 is formed on the rear side wall of the housing 2, extending axially to the rear end face of the housing 2, and connecting the inner cavity of the housing with the outside of the housing. The shape of the lateral groove 201 can be a rectangular groove or an oblong groove to facilitate processing and accommodate the lead-out direction of the printed circuit board 11. The opening area of ​​the lateral groove 201 on the side wall of the housing 2 is limited to a portion of the circumference of the housing 2, thus preserving most of the wall of the housing 2. This design has the following significant advantages: First, the shielding effectiveness of the metal shell against electromagnetic waves depends on its conductive continuity and opening area. The side groove 201 has a smaller opening area, resulting in less electromagnetic leakage, which is beneficial for improving the anti-interference capability during high-frequency signal transmission. Second, the smaller opening facilitates subsequent sealing, and the sealing body 12 can easily achieve a reliable seal. Third, it preserves the overall structural strength of the shell 2, avoiding a decrease in mechanical strength due to a large opening area, and ensuring the structural integrity of the connector under harsh environments such as vibration and impact. Fourth, the side groove 201 extends axially to the rear end face of the shell 2, allowing the printed circuit board 11 to be inserted axially from the rear, facilitating the precise insertion of the tail of the contact 5 into the solder hole of the printed circuit board 11, meeting the national standard requirements for the exposed height of the contact tail. At the same time, the rear opening facilitates observation and operation during the assembly process, improving manufacturability.

[0060] The inner wall of the housing 2 is provided with multiple axial limiting structures. Specifically, the inner wall of the housing 2 is provided with a first step 202, a second step 203 and a groove 204 from front to back (see...). Figure 5 These limiting structures are used for precise axial positioning of internal components, preventing displacement due to vibration or impact during use. For example... Figures 5-7As shown, within the inner cavity of the housing 2, an interface seal 6, an insulator 7, and a sealing body 8 are arranged sequentially from front to back along the axial direction. The interface seal 6 is located at the front (mating end) of the inner cavity of the housing 2, with its front end face abutting against the first step 202 on the inner wall of the housing 2. The interface seal 6 is made of an elastic material and is compressed when the connector and the mating connector are mated, thereby achieving a seal at the mating interface and preventing moisture, dust, etc., from entering the contact area. Its sealing principle is to fill the tiny gaps between the mating surfaces through elastic deformation, forming a pressure seal. The insulator 7 is located behind the interface seal 6, with its front end face contacting the rear end face of the interface seal 6, and the insulator 7 abutting against the second step 203. The insulator 7 is made of an insulating material (such as engineering plastic) and has multiple contact mounting holes inside to accommodate and fix the contacts 5, while ensuring electrical insulation between the contacts. The dielectric strength of the insulator 7 determines the withstand voltage performance of the connector. The sealing body 8 is positioned behind the insulator 7, with its front end contacting the rear end of the insulator 7. The sealing body 8 is embedded in the groove 204 on the inner wall of the housing 2, thus being axially restrained. The sealing body 8 is also made of elastic material, with a through hole in its center for the contact member 5 to pass through. When the contact member 5 passes through, the elastic inner wall of the sealing body 8 tightly adheres to the outer surface of the contact member 5, forming a radial seal to prevent moisture or contaminants from entering the contact area from the tail end along the contact member surface. The design of the groove 204 ensures that the sealing body 8 will not move axially after compression, guaranteeing a long-term sealing effect.

[0061] The contact 5 is preferably a printed circuit board pin, which is disposed within the insulator 7 along the axial direction of the housing 2. The front end of the contact 5 is used to mate with the contact of a mating connector, and its rear end extends rearward and passes through the sealing body 8. The rear end of the contact 5 is reliably electrically connected to a portion of the printed circuit board 11 by soldering. Compared with crimping, soldering has lower contact resistance and higher mechanical strength, and is particularly suitable for miniaturized connectors with high-density contacts.

[0062] The printed circuit board 11 is disposed in a receiving cavity at the rear end of the housing 2. A portion of the printed circuit board 11 (e.g.) Figure 5 The lower half shown is soldered to the rear end of the contact 5, and the other part of the printed circuit board 11 (e.g., the lower half shown) is soldered to the rear end of the contact 5. Figure 5 The upper portion (shown) extends from the inner cavity of the housing 2 to the outside via a side slot 201. In this way, the printed circuit board 11 achieves both signal transmission with internal contacts and allows external signal lines or power lines to be directly soldered or crimped onto the pads at its leads. Compared to traditional connectors that use multiple independent wires at the tail, this invention uses the printed circuit board 11 as the signal transmission carrier. The circuitry is planar copper foil, very thin, allowing multiple signal lines to be integrated onto the same printed circuit board without the need for individual insulation of each line, thus significantly reducing the space occupied at the tail and the overall weight.

[0063] A grounding layer (not shown in the figure) is provided on the printed circuit board 11, which is usually located on the inner layer or back of the printed circuit board 11 for shielding and grounding. The grounding layer is a continuous copper foil plane, which can effectively absorb and conduct electromagnetic interference.

[0064] like Figures 4 to 7 As shown, the rear end of the tail nut 3 is open, and a partition 301 is provided inside. The partition 301 divides the inner cavity of the tail nut 3 into a front space and a rear space, with the rear space being the potting cavity 304. A wire-passing hole 302 and a threaded hole 303 are provided on the partition 301. The wire-passing hole 302 is used for the grounding wire 13 to pass through, and the threaded hole 303 is used to mate with the grounding screw 4. The front end of the tail nut 3 is fixedly connected to the rear end of the housing 2 by threads. A sealing ring (not shown in the figure) can be provided at the connection to ensure a tight seal. The threaded connection provides removability, facilitating maintenance and replacement of internal components.

[0065] One end of the grounding wire 13 is electrically connected to the grounding layer of the printed circuit board 11 by soldering, and the other end of the grounding wire 13 passes through the wire hole 302 on the partition 301 and enters the potting cavity 304. A spring washer 10 and a flat washer 9 are mounted on the grounding screw 4, with the flat washer 9 close to the surface of the partition 301 and the spring washer 10 located between the flat washer 9 and the head of the grounding screw 4. The grounding screw 4 is connected to the other end of the grounding wire 13 (for example, by wrapping or crimping the end of the grounding wire 13 onto the grounding screw 4, or by using a terminal block with a tail), and then the grounding screw 4 is screwed into the threaded hole 303 on the partition 301 and tightened. The spring washer 10 acts as an anti-loosening device to prevent the grounding screw 4 from loosening due to vibration; the flat washer 9 increases the contact area, reduces contact resistance, and protects the surface of the partition 301. Through the above connection, the grounding layer of the printed circuit board 11 forms a complete grounding path sequentially through the grounding wire 13, the grounding screw 4, the partition 301, the tail nut 3, and the housing 2, resulting in low contact resistance and reliable grounding. Compared with the traditional method of leading the grounding wire out of the housing and then grounding, the grounding path of the present invention is completed entirely inside the connector, without relying on external wiring, reducing connection points and the probability of failure, and also avoiding the space occupied by external grounding wires.

[0066] This connector features two independent sealing structures: a sealing body 12 at the side groove 201 and a potting layer 14 at the rear end of the tail nut 3. These two seals work together to ensure the overall environmental sealing of the connector while addressing different leakage paths. The sealing body 12 is located at the side groove 201 and is used to seal it. The sealing body 12 can be formed at the side groove 201 using heat shrinking (e.g., heat shrink tubing), vulcanization (e.g., vulcanized rubber), or injection molding (e.g., injection molded sealant). The sealing body 12 can seal only the side groove 201 itself, or it can further fill and seal the entire rear end cavity, including the side groove 201 and the tail nut 3, forming an integral sealing structure. When using an integral seal, the sealing performance is significantly improved, and the anti-interference performance is better. The entire sealing process does not fill the internal area of ​​the housing 2; only the opening is sealed, ensuring the maintainability of the internal components. A potting layer 14 is disposed in the potting cavity 304 at the rear end of the tail nut 3 to fix and seal the grounding screw 4 and the grounding wire 13. After the connection of the grounding wire 13 and the grounding screw 4 is completed, the potting cavity 304 is potted to form the potting layer 14. The potting layer 14 covers the head of the grounding screw 4 and fills the potting cavity 304 to prevent the grounding screw 4 from loosening and being affected by the external environment. The potting material can be conventional potting adhesives such as epoxy resin and silicone, which, after curing, form a hard or elastic solid that completely covers the grounding screw 4 and the grounding wire 13, providing fixation, insulation, moisture protection, and vibration damping. In addition to sealing, the potting layer 14 has another crucial function: preventing foreign matter from causing grounding failure. In the environment where the connector is used, conductive foreign matter such as metal shavings and dust may be generated. Without the potting layer 14, these foreign matter may fall on the head of the grounding screw 4 or the exposed part of the grounding wire 13, forming an unfavorable electrical connection, such as short-circuiting the grounding terminal with the adjacent signal terminal, or introducing interference. The potting layer 14 completely covers these conductive components, isolates them from external debris, and ensures the uniqueness and stability of the grounding path.

[0067] To further improve the bonding strength between the potting layer 14 and the inner wall of the potting cavity 304, and to prevent the potting layer 14 from cracking or peeling during temperature changes or long-term use, several annular grooves 3041 are provided on the inner wall of the potting cavity 304 (see...). Figure 5 The annular groove 3041 increases the contact area between the potting material and the inner wall of the tail nut 3, forming a mechanical interlock. The cured potting material is embedded in the annular groove 3041 and is difficult to detach even under axial tensile force. This design is particularly suitable for environments with severe high and low temperature cycles, because the difference in the thermal expansion coefficients of different materials will generate internal stress, and the annular groove structure can effectively resist this stress.

[0068] Please refer to Figure 5 and Figure 6The printed circuit board 11 can be a rigid printed circuit board or a rigid-flex printed circuit board. When the printed circuit board 11 is a rigid-flex printed circuit board, it includes a first rigid region 113, a second rigid region 111, and a flexible connecting portion 112 connecting the first rigid region 113 and the second rigid region 111. In this case, the first rigid region 113 is located inside the housing 2, the second rigid region 111 is located outside the housing 2, and the flexible connecting portion 112 is led out from the lateral groove 201 and connected to the second rigid region 111 located outside the housing 2. Then, the lateral groove 201 is sealed. With this configuration, the position and orientation of the second rigid region 111 outside the housing 2 can be flexibly adjusted by means of the features of the flexible connecting portion 112. It is not limited to requiring the contacts of other external connectors or adapters to be inserted and mated with the printed circuit board outside the housing in accordance with the axial direction of the printed circuit board connector of the present invention. This is applicable to connection scenarios where the output end (rear end) of the printed circuit board connector of the present invention is adapted to various directions. Furthermore, when the portion of the rigid-flex printed circuit board that passes through the side groove 201 is configured as a flexible connection portion 112, the inherent flexibility of the flexible connection portion 112 makes it easier to use a heat-shrinkable sleeve fitted on the housing 2 to heat-shrink protect the side groove 201.

[0069] The assembly method of the printed circuit board connector is described below: During assembly, firstly, the interface sealing body 6, insulator 7, contact 5, and sealing body 8 are sequentially installed into the inner cavity of the housing 2, using the first step 202, the second step 203, and the groove 204 for axial positioning. Then, the printed circuit board 11 is installed into the inner cavity of the housing 2 from the rear end, and a portion of the printed circuit board 11 is soldered to the rear end of the contact 5. One end of the grounding wire 13 is soldered to the grounding layer of the printed circuit board 11, and the other end passes through the wire hole 302 on the tail nut 3 partition 301. Then, the tail nut 3 is tightened to the rear end of the housing 2. Next, the spring washer 10 and the flat washer 9 are threaded onto the grounding screw 4, and this end of the grounding wire 13 is connected to the grounding screw 4. Then, the grounding screw 4 is screwed into the threaded hole 303 and tightened. Next, the side groove 201 is sealed to form a sealing body 12 (heat shrink / vulcanization / injection molding), and the potting cavity 304 is filled with glue and cured to form a potting layer 14. Finally, external wires are connected to the leads of the printed circuit board 11 as needed.

[0070] This invention comprehensively solves technical challenges such as limited space, lightweight design, shielding, grounding, and sealing: A printed circuit board (PCB) 11 replaces the traditional wire harness, significantly reducing the tail space and weight; the side groove 201 allows the PCB 11 to extend from the side, reducing axial length. The housing 2 has only one opening, the side groove 201, with a small opening area and minimal electromagnetic leakage; the PCB 11 forms a low-impedance grounding path with the housing 2 via the grounding wire 13, grounding screw 4, and tail nut 3, with the spring washer 10 preventing loosening and the potting layer 14 providing fixation, ensuring reliable grounding under vibration. Two seals (the sealing body 12 sealing the side groove 201 and the potting layer 14 sealing the tail end) respectively prevent moisture from entering from the side and tail, and the annular groove 3041 enhances peel resistance. In summary, the PCB connector of this invention, through its innovative design of extending the PCB 11 via the side groove 201, integrating grounding with the tail nut 3, and multiple seals, achieves significant technical progress in terms of limited space, lightweight design, high shielding effectiveness, and reliable grounding.

[0071] It should be noted that this invention is particularly suitable for improving the JY599 series connectors, and can meet the needs of use in confined spaces without changing the original interface size, while achieving lightweight, enhanced shielding and reliable grounding functions.

[0072] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A printed circuit board connector, characterized in that, include: The housing (2) has an inner cavity at its rear end, and a lateral groove (201) is provided on the side wall of the housing (2). The lateral groove (201) extends axially to the rear end face of the housing (2) and connects the inner cavity with the outside of the housing (2). The contact element (5) is disposed inside the housing (2) along the axial direction of the housing (2); The tail nut (3) has an open rear end and an internal partition (301). The partition (301) has a threaded hole (303) and a wire hole (302). The tail nut (3) is fixedly connected to the rear end of the housing (2). A printed circuit board (11) has a portion electrically connected to the contact (5) and another portion extending from the inner cavity to the outside of the housing (2) via the side groove (201). The printed circuit board (11) is a rigid-flexible printed circuit board, including a first rigid region (113), a second rigid region (111), and a flexible connecting portion (112) connecting the first rigid region (113) and the second rigid region (111). The first rigid region (113) is located inside the housing (2), the second rigid region (111) is located outside the housing (2), and the flexible connecting portion (112) extends to the outside of the housing (2) via the side groove (201). A grounding wire (13) has one end electrically connected to the grounding layer of the printed circuit board (11) and the other end passes through the wire hole (302) on the partition (301). A grounding screw (4) is connected to the other end of the grounding wire (13) and screwed into the threaded hole (303) on the partition plate (301); A potting layer (14) is provided in the potting cavity (304) at the rear end of the tail nut (3) for fixing and sealing the grounding screw (4) and the grounding wire (13). A sealing body (12) is disposed at the side groove (201) for sealing the side groove (201).

2. The printed circuit board connector according to claim 1, characterized in that: The contact (5) is a printed circuit board pin, and the printed circuit board (11) is connected to the contact (5) by soldering.

3. The printed circuit board connector according to claim 1, characterized in that: The tail nut (3) is connected to the rear end of the housing (2) by a thread.

4. The printed circuit board connector according to claim 1, characterized in that: The sealing body (12) is formed at the side groove (201) by heat shrinking, vulcanization or injection molding.

5. The printed circuit board connector according to claim 1, characterized in that: The plug (12) fills and seals the entire rear end cavity, including the side groove (201) and the tail nut (3).

6. The printed circuit board connector according to claim 1, characterized in that: The lateral groove (201) is a rectangular groove or a waist-shaped groove.

7. The printed circuit board connector according to claim 1, characterized in that: The grounding wire (13) is connected to the grounding layer of the printed circuit board (11) by welding.

8. The printed circuit board connector according to claim 1, characterized in that: The potting layer (14) covers the head of the grounding screw (4).

9. The printed circuit board connector according to claim 1, characterized in that: The inner wall of the filling cavity (304) is provided with several annular grooves (3041).

10. The printed circuit board connector according to claim 1, characterized in that: It also includes a spring pad (10) and a flat pad (9), both of which are inserted through the grounding screw (4) and located between the grounding screw (4) and the partition plate (301).

11. The printed circuit board connector according to claim 1, characterized in that: It also includes an insulator (7), an interface seal (6), and a sealing wire (8) disposed in the inner cavity of the housing (2). The contact (5) is disposed in the insulator (7). The interface seal (6) and the sealing wire (8) are respectively disposed at the front and rear ends of the insulator (7), and the contact (5) passes through the interface seal (6) and the sealing wire (8).

12. The printed circuit board connector according to claim 11, characterized in that: The housing (2) is a hollow stepped shaft with multiple limiting structures on its inner wall, including a first step (202) for axially limiting the interface sealing body (6), a second step (203) for axially limiting the insulator (7), and a groove (204) for axially limiting the sealing body (8).

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