A multi-pin coaxial connector

Abstract

The utility model provides a kind of multi-PIN coaxial connector, including male connector and female connector, male connector is equipped with the cylinder plug of stepped column structure, 4PIN terminal layout and sealing ring, female connector is equipped with the cylinder slot of stepped groove structure and matched 4PIN terminal;When inserting, the stepped structure of male end and female end cooperates to realize blind insertion, 4PIN terminal meets the demand of multi-signal transmission, and sealing ring forms radial seal to realize IPX7 waterproof.The utility model is compact in structure, efficient in assembly, reliable in performance, and can be widely applied in communication, automotive electronics, industrial control and other scenes requiring multi-signal transmission and adaptation to harsh environments.

Description

Technical Field

[0001] This utility model relates to electrical connector technology, and in particular to a multi-pin coaxial connector, which is suitable for electronic equipment connection scenarios requiring multiple signal transmission, blind mating assembly, and harsh and humid environments. Background Technology

[0002] Coaxial connectors are widely used in communications, industrial control, and automotive electronics due to their stable signal transmission and strong anti-interference capabilities. However, existing coaxial connectors have the following technical problems in practical applications:

[0003] (1) Insufficient number of pins to meet the needs of multi-signal transmission: Traditional coaxial connectors are mostly 2PIN structures, which can only realize the transmission of single signal or power. However, with the increase in the integration of electronic devices, such as vehicle radar and industrial sensors, multiple signals (such as data signals, control signals and power signals) need to be transmitted at the same time. 2PIN coaxial connectors can no longer adapt to such multi-signal transmission scenarios.

[0004] (2) 4PIN connectors require a foolproof design and cannot be blindly inserted, resulting in low assembly efficiency: To avoid terminal mismatch, a few existing 4PIN coaxial connectors require additional foolproof structures (such as irregular plugs and positioning pins). During assembly, alignment marks must be identified before insertion, making blind insertion impossible. Especially in scenarios where the internal space of the equipment is small and the line of sight is obstructed, the assembly difficulty increases significantly, seriously affecting production efficiency.

[0005] (3) Lack of waterproof structure, limited application scenarios: Most multi-pin coaxial connectors on the market are not designed with waterproof sealing structure. When used in outdoor equipment, vehicle water-contact components or industrial humid environments, moisture can easily enter the connector from the mating interface, causing terminal oxidation, signal transmission interruption or even short circuit of the equipment, and cannot meet the waterproof level requirements of IPX7 and above.

[0006] To address the aforementioned issues, there is an urgent need to design a coaxial connector that combines multi-pin signal transmission, blind mating assembly, and waterproofing to overcome the shortcomings of existing technologies. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of existing coaxial connectors, such as "few pins, difficulty in blind mating, and lack of waterproofing," and to provide a multi-pin coaxial connector that achieves the following objectives: ① Expanding to a 3-4 pin structure to meet the needs of multiple signal transmissions; ② Achieving blind mating without the need for foolproof design, thus improving assembly efficiency; ③ Achieving an IPX7 waterproof rating, suitable for harsh and humid environments; ④ Providing multiple installation methods to enhance scenario adaptability.

[0008] To achieve the above and other related objectives, the technical solution provided by this utility model is: a multi-pin coaxial connector, comprising:

[0009] A male connector, comprising a male insulating shell, male pin terminals, male sleeve terminals one, male sleeve terminals two, and male sleeve terminals three. The insertion end of the male insulating shell extends along the insertion direction to form a cylindrical plug. The male pin terminals are coaxially fixed inside the cylindrical plug. The male sleeve terminals are fitted onto the inner wall of the cylindrical plug. The male sleeve terminals two and three are both fitted onto the outer wall of the cylindrical plug and are arranged sequentially along the insertion direction.

[0010] A female connector comprises a female insulating shell, a female sleeve terminal, a female waist drum terminal, a female leaf spring terminal one, and a female leaf spring terminal two. The insertion end of the female insulating shell extends along the insertion direction to form a cylindrical slot. The cylindrical slot has coaxially arranged cylindrical posts. The female sleeve terminal is sleeved on the inner wall of the cylindrical post, and the female waist drum terminal is sleeved on the outer wall of the cylindrical post. The female leaf spring terminal one and the female leaf spring terminal two are circumferentially attached to the inner wall of the cylindrical slot. The contact springs of the female leaf spring terminal one and the female leaf spring terminal two are arranged sequentially along the insertion direction.

[0011] In the mating state, the male pin terminal is connected to the female sleeve terminal, the first male sleeve terminal is connected to the female waist drum terminal, the second male sleeve terminal is connected to the second female leaf spring terminal, and the third male sleeve terminal is connected to the first female leaf spring terminal.

[0012] A preferred technical solution is that the outer diameter of the cylindrical plug is matched with the inner diameter of the cylindrical slot.

[0013] The preferred technical solution is as follows: the outer ring of the cylindrical plug is configured as a stepped column structure and includes a large-diameter plug section and a small-diameter plug section. The second male sleeve terminal and the third male sleeve terminal are sequentially attached to the outer periphery of the small-diameter plug section along the insertion direction. A sealing ring is sleeved on the outer periphery of the large-diameter plug section.

[0014] The preferred technical solution is as follows: the internal structure of the cylindrical slot is a stepped groove structure and includes a large-diameter slot and a small-diameter slot. The contact spring of the first female leaf spring terminal and the contact spring of the second female leaf spring terminal are sequentially arranged on the inner wall of the small-diameter slot along the insertion direction. The large-diameter slot is matched with the large-diameter plug, and the small-diameter slot is matched with the small-diameter plug.

[0015] The preferred technical solution is as follows: the first female end spring-type terminal is configured as an F-type structure, including a vertically arranged PIN pin and two spring contact structures connected to the top of the PIN pin, the two spring contact structures being arranged horizontally at intervals; the second female end spring-type terminal is configured as an F-type structure, including a vertically arranged PIN pin and two spring contact structures connected to the top of the PIN pin, the two spring contact structures being arranged horizontally at intervals.

[0016] The preferred technical solution is as follows: four sets of assembly slots are arranged at equal angles along the inner wall of the cylindrical slot, the assembly slots extend along the axial direction, and the first spring structure and the second spring structure are inserted into the assembly slots.

[0017] Due to the application of the above technical solution, the beneficial effects of this utility model are as follows:

[0018] Solving the problem of multi-signal transmission: Through the male terminal design of "1 pin terminal + 3 sleeve terminals" and corresponding female terminals, a 4PIN transmission channel is formed, which can transmit multiple signals or power simultaneously, adapting to the needs of highly integrated devices.

[0019] Achieving blind insertion and improving assembly efficiency: The guide structure of the male stepped plug and the female stepped slot replaces the traditional foolproof design, eliminating the need for alignment identification during insertion. This is especially suitable for assembly in confined spaces, thus improving assembly efficiency.

[0020] Achieves IPX7 waterproof rating: The sealing ring of the large-diameter plug forms a radial seal with the female end slot, making it suitable for harsh environments such as outdoor, vehicle-mounted water immersion, and industrial humidity. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the male connector structure involved in this utility model.

[0022] Figure 2 This is a schematic diagram of the female connector structure involved in this utility model.

[0023] Figure 3 This is a schematic diagram of the female end leaf spring type terminal involved in this utility model. Detailed Implementation

[0024] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0025] Please see Figures 1-3It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component 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 utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Example:

[0028] like Figures 1 to 3 As shown, according to a general technical concept of this utility model, a multi-pin coaxial connector is provided, comprising:

[0029] The male connector is composed of a male insulating shell 11, a male pin terminal 12, a male sleeve terminal one 13, a male sleeve terminal two 14, and a male sleeve terminal three 15. The insertion end of the male insulating shell 11 extends along the insertion direction to form a cylindrical plug 111. The male pin terminal 12 is coaxially fixed inside the cylindrical plug 111. The male sleeve terminal one 13 is sleeved on the inner wall of the cylindrical plug 111. The male sleeve terminal two 14 and the male sleeve terminal three 15 are both sleeved on the outer wall of the cylindrical plug 111 and are arranged sequentially along the insertion direction.

[0030] The female connector is composed of a female insulating shell 21, a female sleeve terminal 22, a female waist drum terminal 23, a female leaf spring terminal 1 24, and a female leaf spring terminal 25. The insertion end of the female insulating shell 21 extends along the insertion direction to form a cylindrical slot 211. The cylindrical slot 211 is provided with coaxially arranged cylindrical posts 212. The female sleeve terminal 22 is sleeved on the inner wall of the cylindrical post 212, and the female waist drum terminal 23 is sleeved on the outer wall of the cylindrical post 212. The female leaf spring terminal 1 24 and the female leaf spring terminal 25 are circumferentially attached to the inner wall of the cylindrical slot 211. The contact springs of the female leaf spring terminal 1 24 and the female leaf spring terminal 25 are arranged sequentially along the insertion direction.

[0031] In the mating state, the male pin terminal 12 is connected to the female sleeve terminal 22, the male sleeve terminal 13 is connected to the female waist drum terminal 23, the male sleeve terminal 24 is connected to the female leaf spring terminal 25, and the male sleeve terminal 35 is connected to the female leaf spring terminal 24.

[0032] By matching the female terminal with "1 male pin + 3 male sleeve terminals", a 4-pin independent signal / power transmission channel is formed, which can transmit multiple signals (such as data signals and control signals) and power at the same time. This effectively overcomes the defect of insufficient pin count of traditional 2-pin coaxial connectors, adapts to the multi-signal transmission needs of highly integrated devices such as automotive radar and industrial sensors, and improves the functional adaptability of the connector.

[0033] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, the outer diameter of the cylindrical plug 111 is matched with the inner diameter of the cylindrical slot 211.

[0034] Precise size matching reduces the assembly gap between the male plug and the female slot, ensuring accurate alignment of terminals during insertion and preventing terminal contact misalignment due to excessive gaps. At the same time, tight size matching enhances structural stability after insertion, reduces the risk of terminal contact loosening in vibration environments (such as vehicle driving or industrial equipment operation), and further ensures the continuity and reliability of signal transmission.

[0035] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, the outer ring of the cylindrical plug 111 is configured as a stepped column structure and includes a large-diameter plug 1111 and a small-diameter plug 1112. The male end sleeve terminal 2 14 and the male end sleeve terminal 3 15 are sequentially attached to the outer periphery of the small-diameter plug 1112 along the insertion direction, and a sealing ring 3 is sleeved on the outer periphery of the large-diameter plug 1111.

[0036] Stepped post structure: It forms a “concave-convex cooperative guidance” with the stepped groove structure of the female end, replacing the foolproof structure (such as irregular plugs and positioning pins) that traditional 4PIN connectors need to set. No manual identification of alignment marks is required during insertion. Even in the narrow interior of the equipment and in the scene where the line of sight is obstructed, it can achieve fast blind insertion, which greatly reduces the assembly difficulty and improves the production assembly efficiency.

[0037] Sealing ring design: After mating, the sealing ring 3 on the outer periphery of the large-diameter plug 1111 can fit tightly against the inner wall of the large-diameter slot 2112 of the female end, forming a radial sealing barrier. This effectively prevents moisture from entering the connector from the mating interface, meeting the IPX7 waterproof rating requirements. It is suitable for outdoor equipment, vehicle water-contaminated components, industrial humid environments, and other scenarios, avoiding terminal oxidation, signal transmission interruption, or equipment short circuit problems.

[0038] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, the inner structure of the cylindrical slot 211 is a stepped groove structure and includes a large-diameter slot 2111 and a small-diameter slot 2112. The contact spring of the female end spring-type terminal 24 and the contact spring of the female end spring-type terminal 25 are sequentially arranged on the inner wall of the small-diameter slot 2112 along the insertion direction. The large-diameter slot 2111 is matched with the large-diameter plug 1111, and the small-diameter slot 2112 is matched with the small-diameter plug 1112.

[0039] Precise matching of stepped groove and stepped column: further enhances the blind insertion guidance effect. During the insertion process, the stepped structure can automatically correct the offset direction of the plug, ensuring that the male sleeve terminal two and three and the female leaf spring terminal two and one are precisely connected, completely avoiding the risk of terminal mismatch.

[0040] Small-diameter slot layout terminals: The compact space of the small-diameter section allows for layered arrangement of terminals without increasing the overall size of the connector, ensuring structural compactness.

[0041] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, the female end spring-type terminal 24 is configured as an F-type structure, including a vertically arranged PIN pin 241 and two spring contact structures 242 connected to the top of the PIN pin 241, the two spring contact structures 242 being horizontally spaced apart; the female end spring-type terminal 25 is configured as an F-type structure, including a vertically arranged PIN pin 2 and two spring contact structures 2 connected to the top of the PIN pin 2, the two spring contact structures 2 being horizontally spaced apart.

[0042] Vertical pins: facilitate soldering or insertion with the device's PCB (printed circuit board), simplify the connector assembly process, and improve installation convenience;

[0043] Double-spaced spring contacts: form multi-point contact with the male sleeve terminal, increasing the contact area, reducing contact resistance, reducing signal transmission loss, and improving transmission efficiency; at the same time, the spring contacts have elastic deformation capability, which can compensate for small dimensional deviations during mating, avoid terminal wear caused by rigid contact, and extend the service life of the connector.

[0044] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, four sets of equidistantly arranged assembly slots are provided on the inner wall of the cylindrical slot 21 along the circumferential direction. The assembly slots extend axially, and spring structure 1 241 and spring structure 2 are inserted into the assembly slots.

[0045] Positioning and fixing function: The assembly slot can accurately position the spring structure of the female end spring type terminal, prevent the spring from shifting or deforming during the insertion process, ensure the stability of the terminal position, and avoid poor contact caused by spring offset;

[0046] Force balance and assembly efficiency: The four sets of assembly slots arranged at equal angles ensure that the terminals are subjected to uniform force. During insertion, the male plug can be smoothly inserted along the circumference, reducing insertion and removal jamming and improving assembly smoothness. At the same time, the assembly slots provide a clear benchmark for the batch assembly of terminals, reducing the positioning difficulty during production and improving production efficiency and product consistency.

[0047] Therefore, this utility model has the following advantages:

[0048] This invention provides a multi-pin coaxial connector, including a male connector and a female connector. The male connector features a stepped cylindrical plug, a 4-pin terminal layout, and a sealing ring. The female connector features a stepped cylindrical slot and matching 4-pin terminals. During mating, the stepped structures of the male and female connectors work together to achieve blind mating, the 4-pin terminals meet the requirements of multi-signal transmission, and the sealing ring forms a radial seal to achieve IPX7 waterproofing. This invention features a compact structure, efficient assembly, and reliable performance, and can be widely used in communication, automotive electronics, industrial control, and other scenarios requiring multi-signal transmission and adaptation to harsh environments.

[0049] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A multi-pin coaxial connector, characterized in that, include: A male connector, comprising a male insulating shell, male pin terminals, male sleeve terminals one, male sleeve terminals two, and male sleeve terminals three. The insertion end of the male insulating shell extends along the insertion direction to form a cylindrical plug. The male pin terminals are coaxially fixed inside the cylindrical plug. The male sleeve terminals are fitted onto the inner wall of the cylindrical plug. The male sleeve terminals two and three are both fitted onto the outer wall of the cylindrical plug and are arranged sequentially along the insertion direction. A female connector comprises a female insulating shell, a female sleeve terminal, a female waist drum terminal, a female leaf spring terminal one, and a female leaf spring terminal two. The insertion end of the female insulating shell extends along the insertion direction to form a cylindrical slot. The cylindrical slot has coaxially arranged cylindrical posts. The female sleeve terminal is sleeved on the inner wall of the cylindrical post, and the female waist drum terminal is sleeved on the outer wall of the cylindrical post. The female leaf spring terminal one and the female leaf spring terminal two are circumferentially attached to the inner wall of the cylindrical slot. The contact springs of the female leaf spring terminal one and the female leaf spring terminal two are arranged sequentially along the insertion direction. In the mating state, the male pin terminal is connected to the female sleeve terminal, the first male sleeve terminal is connected to the female waist drum terminal, the second male sleeve terminal is connected to the second female leaf spring terminal, and the third male sleeve terminal is connected to the first female leaf spring terminal.

2. A multi-pin coaxial connector according to claim 1, characterized in that: The outer diameter of the cylindrical plug is matched with the inner diameter of the cylindrical slot.

3. A multi-pin coaxial connector according to claim 1, characterized in that: The outer ring of the cylindrical plug is configured as a stepped column structure and includes a large-diameter plug section and a small-diameter plug section. The second male sleeve terminal and the third male sleeve terminal are sequentially attached to the outer periphery of the small-diameter plug section along the insertion direction. A sealing ring is sleeved on the outer periphery of the large-diameter plug section.

4. A multi-pin coaxial connector according to claim 3, characterized in that: The cylindrical slot has an internal stepped groove structure and includes a large-diameter slot and a small-diameter slot. The contact spring of the first female leaf spring terminal and the contact spring of the second female leaf spring terminal are sequentially arranged on the inner wall of the small-diameter slot along the insertion direction. The large-diameter slot is matched with the large-diameter plug, and the small-diameter slot is matched with the small-diameter plug.

5. A multi-pin coaxial connector according to claim 1, characterized in that: The first female end spring-type terminal is configured in an F-shape, including a vertically arranged PIN pin and two spring contact structures connected to the top of the PIN pin, with the two spring contact structures arranged horizontally at intervals; the second female end spring-type terminal is configured in an F-shape, including a vertically arranged PIN pin and two spring contact structures connected to the top of the PIN pin, with the two spring contact structures arranged horizontally at intervals.

6. A multi-pin coaxial connector according to claim 5, characterized in that: The inner wall of the cylindrical slot is provided with four sets of assembly slots arranged at equal angles along the circumference. The assembly slots extend axially, and the first spring structure and the second spring structure are inserted into the assembly slots.

Images