Connector

Abstract

The utility model relates to the technical field of signal transmission devices, in particular to a connector. According to the connector provided by the utility model, one end of the first center pin is provided with the plugging cavity, and the second center pin is inserted into the plugging cavity and can slide in a guiding manner relative to the plugging cavity, so that the first center pin and the second center pin are conductively connected; a containing cavity is formed in the insulator, the portion, connected with the second center pin in an inserted mode, of the first center pin extends into the containing cavity and can move relative to the containing cavity, the insertion cavity is of an elastic closing-up structure, the second center pin is provided with an abutting section, the abutting section is provided with a first circular truncated cone face, and the inner side wall of the insertion cavity elastically abuts against the first circular truncated cone face. During installation, radial force can enable the metal petals and the second center pin to be in close contact in the radial direction, axial force can enable the two center pins to be in close contact with the corresponding PCBs, the requirement for axial tolerance can be met without a spring, the size in the axial direction and the radial direction can be smaller, and the requirement for signal transmission between compact boards is met.

Description

Technical Field

[0001] The utility model relates to the technical field of signal transmission devices, and particularly relates to a connector. Background Art

[0002] Board-to-board connectors are widely used for interconnecting wireless system modules, such as communication base stations, RRH (Remote Radio Head), repeaters, GPS devices, and other similar applications. In the connection design of board-to-board or board-to-filter, due to manufacturing and assembly errors, the connector needs to allow axial and radial tolerances when connecting board-to-board or board-to-filter. The main trends of wireless devices are: allowing working tolerances, smaller sizes, and easier installation. These trends have made the spring pin structure widely used in connector design because spring pins have the advantages of small volume and convenient installation. However, as the device size requirements are getting smaller and smaller, it poses a higher challenge to reduce the size of the traditional spring pin connection scheme.

[0003] The existing connectors adopt a structure design with springs in the board-to-board connection design, and the board spacing size cannot meet the requirements of compact applications. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a connector to meet the application requirements for the board spacing size in the board-to-board connection scenario.

[0005] To solve the above technical problems, the utility model provides a connector.

[0006] The connector of the utility model includes an insulator, a first center pin, and a second center pin;

[0007] A plugging cavity is arranged at one end of the first center pin, and the second center pin is inserted into the plugging cavity and can slide relative to the plugging cavity for guiding so that the first center pin and the second center pin are conductively connected;

[0008] A receiving cavity is arranged in the insulator, and the mutually inserted parts of the first center pin and the second center pin extend into the receiving cavity and can move relative to the receiving cavity;

[0009] The plugging cavity is an elastic closing structure, a butting section is arranged on the second center pin, the butting section has a first round table surface, and the inner side wall of the plugging cavity elastically abuts against the first round table surface.

[0010] Further, the plugging cavity is surrounded by a plurality of metal petals to form the closing structure, and the plurality of metal petals elastically abut against the first round table surface of the second center pin.

[0011] Furthermore, a guiding surface is provided at the end of the second center pin inserted into the insertion cavity to expand the metal petals during the insertion process.

[0012] Furthermore, an extension section and an anti - detachment section are provided between the first circular table surface and the guiding surface. The anti - detachment section is adjacent to the guiding surface, and the diameter of the anti - detachment section is greater than that of the extension section.

[0013] Furthermore, a first limiting plane for restricting the tail of the second center pin from entering the accommodation cavity is provided at one end of the insulator, and a first limiting boss for abutting against the first limiting plane is provided at the tail of the second center pin.

[0014] Furthermore, there is one second center pin. A second limiting plane for restricting the tail of the first center pin from entering the accommodation cavity is provided at the other end of the insulator, and a second limiting boss for abutting against the second limiting plane is provided at the tail of the first center pin.

[0015] Furthermore, two insertion cavities are provided at each end of the first center pin, and there are two second center pins which are respectively inserted into the two insertion cavities.

[0016] Furthermore, first limiting planes for restricting the tails of the second center pins from entering the accommodation cavity are provided at both ends of the insulator, and first limiting bosses for abutting against the first limiting planes are provided at the tails of the second center pins.

[0017] Furthermore, at least one annular groove is provided on the outer peripheral surface of the insulator.

[0018] Furthermore, a plurality of accommodation cavities arranged at intervals are provided in the insulator, and the first center pin and the second center pin are arranged in each accommodation cavity.

[0019] Compared with the prior art, the utility model has at least the following beneficial effects:

[0020] During installation, since the first center pin and the second center pin can move in the receiving cavity of the insulator, the first center pin and the second center pin can also slide relative to each other through the insertion cavity. At the same time, the insertion cavity of the first center pin is an elastic closing structure, and its inner side wall can elastically abut against the first conical surface. The force exerted by the metal petals on the first conical surface of the second center pin can be decomposed into a radial force and an axial force. Among them, the radial force can make the metal petals and the second center pin in close contact in the radial direction, and the axial force can make the two center pins keep in close contact with the corresponding PCB board, ensuring good contact. Therefore, without a spring, the requirement of axial tolerance can be met, and the dimensions in the axial and radial directions can be made smaller, so as to meet the demand for signal transmission with a compact board spacing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of an embodiment of the connector of the present invention;

[0022] Figure 2 is a schematic structural diagram of another embodiment of the connector of the present invention;

[0023] Figure 3 is a schematic diagram of the state of placing the connector of the present invention into the structural member;

[0024] Figure 4 is a schematic diagram of the state when the second PCB board is installed after placing the connector of the present invention into the structural member;

[0025] Figure 5 is a schematic diagram of the state of the longest working position of the connector of the present invention;

[0026] Figure 6 is a schematic diagram of the state of the intermediate working position of the connector of the present invention;

[0027] Figure 7 is a schematic diagram of the state of the shortest working position of the connector of the present invention.

[0028] REFERENCE MARKS:

[0029] 10, insulator; 11, annular groove; 12, first limiting plane; 13, second limiting plane; 14, third limiting plane;

[0030] 20, first center pin; 21, second limiting boss;

[0031] 30, second center pin; 31, second conical surface; 32, first conical surface; 33, first limiting boss; 34, extension section; 35, anti - detachment section;

[0032] 40, structural member; 50, first PCB board; 60, second PCB board. Detailed implementation manners

[0033] The connector of the present utility model will be described below in conjunction with the schematic diagrams, in which the preferred embodiments of the present utility model are shown. It should be understood that those skilled in the art can modify the present utility model described herein while still achieving the advantageous effects of the present utility model. Therefore, the following description should be understood as a broad guidance for those skilled in the art and not as a limitation on the present utility model.

[0034] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. And the "connection" and "coupling" mentioned in this application, unless otherwise specified, both include direct and indirect connection (coupling). In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0035] In the present utility model, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0036] In the following paragraphs, the present utility model will be described more specifically by way of example with reference to the drawings. The advantages and features of the present utility model will be clearer according to the following description and the claims. It should be noted that the drawings are all in very simplified forms and use non-precise scales, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present utility model.

[0037] The following is combined with the specification appendices Figure 1 to appendices Figure 7 to introduce the connector of the present utility model.

[0038] In one of the embodiments, as Figure 1As shown, the connector includes an insulator 10, a first center pin 20, and a second center pin 30. Among them, the first center pin 20 and the second center pin 30 are both made of metal and can conduct electricity.

[0039] A socket cavity is provided at one end of the first center pin 20, and the second center pin 30 is inserted into the socket cavity and can slide relative to the socket cavity in a guiding manner so that the first center pin 20 and the second center pin 30 are electrically connected.

[0040] An accommodation cavity is provided in the insulator 10, and the mutually inserted parts of the first center pin 20 and the second center pin 30 extend into the accommodation cavity and can move relative to the accommodation cavity.

[0041] The socket cavity is an elastic closing structure, and an abutting section is provided on the second center pin 30. The abutting section has a first round table surface 32, and the inner side wall of the socket cavity elastically abuts on the first round table surface 32.

[0042] During installation, since the first center pin 20 and the second center pin 30 can move in the accommodation cavity of the insulator 10, the first center pin 20 and the second center pin 30 can also slide relative to each other through the socket cavity. At the same time, the socket cavity of the first center pin 20 is an elastic closing structure, and its inner side wall can elastically abut on the first round table surface 32. The force of the metal petals on the first round table surface 32 of the second center pin 30 can be decomposed into a radial force and an axial force. Among them, the radial force can make the metal petals and the second center pin 30 in close contact in the radial direction, and the axial force can make the two center pins keep in close contact with the corresponding PCB board to ensure good contact. Therefore, a spring is not required to meet the requirements of axial tolerance, and the dimensions in the axial and radial directions can be made smaller, so as to meet the requirements of signal transmission with a compact board spacing.

[0043] In one embodiment, at least one annular groove 11 is provided on the outer peripheral surface of the insulator 10. Specifically, in this embodiment, as Figure 4 shown, one annular groove 11 is provided. During use, the connector is arranged in the mounting hole of the structural member 40 between two PCB boards. The outer peripheral surface of the insulator 10 and the mounting hole of the structural member 40 are in clearance fit. The setting of the annular groove 11 can reduce the friction between the insulator 10 and the mounting hole, facilitating installation and disassembly. In other embodiments, the annular groove 11 may not be provided. In other embodiments, according to the length dimension of the mounting hole of the structural member 40, a plurality of annular grooves 11 arranged at intervals may be provided.

[0044] In one embodiment, the socket cavity is surrounded by a plurality of metal petals to form the elastic closing structure, and the plurality of metal petals elastically abut on the first round table surface 32 of the second center pin 30.

[0045] Specifically, the insertion cavity formed by multiple metal petals has a certain elasticity, thus forming the elastic closing structure. During the process of inserting the second center pin 30, the closing part of the insertion cavity is first expanded. Under the action of the elastic force, the metal petals abut against the first circular table surface 32 of the second center pin 30 to achieve the electrical connection between the first center pin 20 and the second center pin 30.

[0046] Furthermore, in order to facilitate the expansion of the insertion cavity, a guiding surface is provided at the end of the second center pin 30 inserted into the insertion cavity to expand the metal petals during the insertion process. Preferably, the guiding surface is the second circular table surface 31, and the cross-sectional area of the small end surface of the second circular table surface 31 is smaller than the cross-sectional area of the opening of the insertion cavity to facilitate insertion. In other embodiments, the guiding surface can also be a conical surface or a square table surface.

[0047] In order to prevent the first center pin 20 and the second center pin 30 from detaching from the insulator 10 due to gravity or vibration conditions, a first limiting plane 12 for restricting the tail of the second center pin 30 from entering the accommodation cavity is provided at one end of the insulator 10, and a second limiting plane 13 for restricting the tail of the first center pin 20 from entering the accommodation cavity is provided at the other end of the insulator 10. The tail of the first center pin 20 has a second limiting boss 21 for abutting against the second limiting plane 13, and the tail of the second center pin 30 has a first limiting boss 33 for abutting against the first limiting plane 12. Thus, during use, the first center pin 20 and the second center pin 30 can be prevented from detaching from the insulator 10.

[0048] Specifically, an annular stepped surface is provided in the accommodation cavity of the insulator 10, and the annular stepped surface constitutes the first limiting plane 12. The first limiting boss 33 is an annular boss located at the end of the second center pin 30, and the diameter of the first limiting boss 33 is greater than the inner diameter of the annular stepped surface.

[0049] In one embodiment, a third limiting plane 14 is provided at the end of the insulator 10 away from the second limiting plane 13. The third limiting plane 14 can prevent the second center pin 30 from being overly squeezed by the PCB board. Therefore, the second center pin 30 will not penetrate too deeply into the insertion cavity, causing the metal petals to be overly deformed and fail.

[0050] In one embodiment, in order to prevent the separation between the two center pins due to gravity or vibration factors, an extension section 34 and an anti - detachment section 35 are provided between the first circular table surface 32 and the guiding surface. The anti - detachment section 35 is adjacent to the guiding surface, and the diameter of the anti - detachment section 35 is greater than the diameter of the extension section 34.

[0051] Specifically, in this embodiment, both the anti-detachment section 35 and the extension section 34 are cylindrical sections, and an annular stepped surface is formed between them for transition. In other embodiments, a conical surface can also be used for transition between them. Since the diameter of the anti-detachment section 35 is larger than that of the extension section 34 and they are transitioned through an annular stepped surface, sufficient holding force exists between the two center pins during transportation or handling, and they are not easily separated due to gravity or vibration factors.

[0052] In another embodiment, as Figure 2 shown, in order to achieve double axial tolerance, a plugging cavity is provided at each end of the first center pin 20, and there are two second center pins 30. The two second center pins 30 are respectively inserted into the two plugging cavities. Among them, both ends of the first center pin 20 are located in the accommodating cavity.

[0053] To prevent the first center pin 20 and the second center pin 30 from detaching from the insulator 10, first limiting planes 12 for restricting the tail of the second center pin 30 from entering the accommodating cavity are provided at both ends of the insulator 10, and the tail of the second center pin 30 has a first limiting boss 33 for abutting against the first limiting plane 12.

[0054] Specifically, annular stepped surfaces are provided at both ends of the accommodating cavity of the insulator 10, and the annular stepped surfaces constitute the first limiting planes 12. The first limiting boss 33 is an annular boss located at the end of the second center pin 30, and the diameter of the first limiting boss 33 is larger than the inner diameter of the annular stepped surface.

[0055] In one of the embodiments, multiple spaced-apart accommodating cavities can also be provided in the insulator 10, and the first center pin 20 and the second center pin 30 are provided in each accommodating cavity. That is, multiple groups of spaced-apart first center pins 20 and second center pins 30 that are inserted into each other are provided in one insulator 10, so as to meet the requirement of multi-point electrical connection when only one insulator 10 is needed.

[0056] Taking the connector with only one second center pin 30 as an example, the usage process and usage scenarios of the connector of the present invention will be described.

[0057] During assembly, first insert the insertion ends of the first center pin 20 and the second center pin 30 into the receiving cavity of the insulator 10 from both ends of the insulator 10 respectively. During the insertion process, the guiding surface of the second center pin 30 enters the insertion cavity of the first center pin 20, thereby expanding the insertion cavity. During this process, the metal petals elastically abut against the first circular table surface 32 of the second center pin 30. After assembly, the first center pin 20 and the second center pin 30 can approach and move away from each other axially, and can also slide in the receiving cavity of the insulator 10. The insertion cavity of the first center pin 20 is an elastic closing structure, and its inner side wall can elastically abut against the first circular table surface 32. The force of the metal petals on the first circular table surface 32 of the second center pin 30 can be decomposed into a radial force and an axial force. Among them, the radial force can make the metal petals and the second center pin 30 in close contact in the radial direction, and the axial force can make the two center pins in close contact with the corresponding PCB board, ensuring good contact. Without a spring, the requirement of axial tolerance can be met, and the dimensions in the axial and radial directions can be made smaller, so as to meet the requirement of signal transmission with a compact board spacing.

[0058] As Figure 3 and Figure 4 shown, during use, first place the connector into the mounting hole of the structural member 40, so that the end of the first center pin 20 abuts against the signal line of the first PCB board 50. At this time, the other end of the second center pin 30 is outside the insulator 10. Then make the signal line of the second PCB board 60 abut against the other end of the second center pin 30, and the insertion end of the second center pin 30 slides in the insertion cavity until the second PCB board fits against the structural member 40. In addition, according to different usage requirements, the first center pin 20 can also be welded to the first PCB board.

[0059] Among them, due to the different manufacturing tolerances of the structural members 40, there are small differences in the thicknesses of different structural members 40, resulting in multiple working positions of the connector. Figure 5 is the longest working position. Figure 6 is the intermediate position. Figure 7 is the shortest working position. The thicknesses of the three structural members 40 decrease in sequence, that is, H1 > H2 > H3. In order to ensure reliable connection, the thickness of the structural member 40 cannot be greater than H1. In order to prevent the metal petals from deforming and failing, the thickness of the structural member 40 cannot be less than H3. When the structural member 40 is made of metal, the structural member 40 can be connected to the grounding part of the PCB board, and the connector can transmit radio frequency signals or other signals such as current or data. When the structural member 40 is made of non-metal material, the connector can transmit current or data signals. Of course, the structural member 40 can also be not provided, but the insulator 10 is directly fixedly connected to the PCB board, and the connector can also transmit current or data signals.

[0060] It can be seen that the connector of the present utility model can meet the requirements of axial tolerance without the need for a spring, and the dimensions in the axial and radial directions can be made smaller, so as to meet the requirements of signal transmission with a compact board spacing.

[0061] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and its equivalent technologies, the present utility model is also intended to include these modifications and variations.

Claims

1. A connector, characterized in that, including an insulator, a first center pin, and a second center pin; An inserting cavity is provided at one end of the first center needle, and the second center needle is inserted into the inserting cavity and can slide relative to the inserting cavity so that the first center needle and the second center needle are conductively connected; The insulator is provided with a receiving cavity, and the mutually inserted parts of the first center needle and the second center needle extend into the receiving cavity and can move relative to the receiving cavity; The inserting cavity is an elastic closing structure. The second center needle is provided with an abutting section, and the abutting section has a first frustum surface. The inner side wall of the inserting cavity elastically abuts against the first frustum surface.

2. The connector according to claim 1, wherein The plug-in cavity is surrounded by a plurality of metal petals to form the closing structure, and the plurality of metal petals elastically abut against the first truncated table surface of the second center needle.

3. The connector according to claim 2, wherein The end of the second center needle inserted into the plug-in cavity is provided with a guide surface to open the metal petals during the plug-in process.

4. The connector according to claim 3, wherein An extension section and an anti-slip section are provided between the first frustum surface and the guide surface. The anti-slip section is adjacent to the guide surface, and a diameter of the anti-slip section is greater than a diameter of the extension section.

5. The connector according to claim 1, characterized in that, A first limiting plane for limiting the tail of the second center needle from entering the accommodating cavity is disposed at one end of the insulator, and the tail of the second center needle has a first limiting boss for abutting against the first limiting plane.

6. The connector according to claim 5, wherein The second center needle has one, and the other end of the insulator is provided with a second limiting plane for limiting the tail of the first center needle from entering the accommodating cavity, and the tail of the first center needle has a second limiting boss for abutting against the second limiting plane.

7. The connector according to claim 1, wherein One inserting cavity is respectively arranged at both ends of the first center needle, and two second center needles are respectively inserted into the two inserting cavities.

8. The connector according to claim 7, characterized in that, Both ends of the insulator are provided with a first limiting plane for limiting the tail of the second center needle from entering the accommodating cavity, and the tail of the second center needle has a first limiting boss for abutting against the first limiting plane.

9. The connector according to claim 1, characterized in that, At least one annular groove is arranged on the outer peripheral surface of the insulator.

10. The connector according to any one of claims 1 to 9, characterized in that, The insulator is provided with a plurality of spaced-apart accommodating cavities, and each of the accommodating cavities is provided with the first center needle and the second center needle.

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